THE CYCLOPAEDIA; on, UNIVERSAL DICTIONARY OF >titntf0, anb i^itcrature, BY ABRAHAM REES, D.D. F.R.S. F.L.S. S.Amer.Soc. WITH THE ASSISTANCE OF EMINENT PROFESSIONAL GENTLEMEN. ILLUSTRATED WITH NUMEROUS ENGRAVINGS, SY THE MOST DISTINGUISHED ARTISTS. IN THIRTY-NINE VOLUMES. VOL. XXXV. LONDON: Printed for LONGMAN, HURST, REES, ORME, & BROWN, Paternoster-Row, F.C. AND J. RIVINGTON, A. STRAHAN, PAYNE AND FOSS, SCATCHERD AND LETTERMAN, J. CUTHELL, CLARKE AND SONS, LACKINGTON HUGHES HARDING MAYOR AND JONES, J. AND A. ARCH, CADELL AND DAVIES, S. BAGSTER, J. MAWMAN, JAMES BLACK AND SON, BLACK KINGSBURY PARBURY AND ALLEN, R. SCHOLEY, J. BOOTH, J. BOOKER, SUTTABY EVANCE AND FOX, BALDWIN CRADOCK AND JOY, SHERWOOD NEELY AND JONES, R. SAUNDERS, HURST ROBINSON AND CO., J. DICKINSON, J. PATERSON, E. WHITESIDE, WILSON AND SONS, AND BRODIE AND DOWDING. 1819. v'K .r:m CVCLO P MDIA: v.or- OR, A NEW UNIVERSAL DICTIONARY OF ARTS and SCIENCES. TA confonant, and the nineteenth letter in the alpha- > bet ; the found of which is formed by a ftrong ■expulfion of the breath through the mouth, upon a fudden drawing back of the tongue from the fore part of the palate, with the lips at the fame time open. The T, at the beginning and end of words, has always the fame found, nearly refembling that of D, for which reafon they are often put for each other ; and QuinAilian even rallies thofe who made any fcruple of writing the one .indifferently for the other : as at for ad. Jet iot fid, haul for haud, &c. The cuftomary found of T is that which occurs in the words take, temptation ; but before an ;', when followed by a vowel, it has the found of an obfcure s, as nation, falvation, except when s precedes /, as Chriflian ; and in derivatives from y, as mighty, migiitit>: The T is one of the five confonants which the abbot de Dangeau calls palatal : thefe five are D, T, G, K, and A'^; the four firft of which have the fame relation to each other, as the labials B-P and F-F have ; D, for inftance, having the fame relation to T, that B has to P, and V to F. The T, the fame author obferves, is a letter of a ftrong found ; fo that a feeble one cannot be heard before it. Hence, to form the fupine of rego, the T of turn changes the g, and ftrengthens it to the found of a c, fo that we fay reBum ; as in the preterperfeft tenfe rext, which we pro- nounce reckfi. Th has two founds : the one foft, as thus ; the other hard, as thing. The found is foft in thefe words, then, thence, there, with their derivatives and compounds, that, thefi, &c. ; and in all words between two vowels, za fiithtr ; and be- tween r and a vowel, as burthen. In other words it is hard, as thich, thunder. Where it is foftened at the end of a word, an e filent muft be added, as breath, breathe. Johnfcn. Vol. XXXV. T is ufed as an abbreviature on ancient monuments, &c. for Titus, Titius, and Tullius. T, among the Ancients, was ufed as a numeral letter, fig- nifying i6o, according to the verfe, " T quoque centenos & fexaginta tenebit." When a dafh was at the top, thus, T, it fignified 1 6© thoufand. T', with a kind of acute accent over it, denoted among the Greeks 300 ; and if the accent was below it, thus Tj, it denoted 300,000. The Q of the Hebrews fignified 9 ; and with two points fixed horizontally over it, thus, ^, it fignified 9000. Sometimes an acute accent over this, or any one of the firft nine letters, multiplies its value by a thoufand. We fhall here obferve, that the number 15 (hould be reprefented by p', i. e. 10 and 5 ; but, becaufe thefe letters conftitute part of the word nin'i Jehovah, the letters IJ^, i.e. 9 and 6, reprefent 15, to prevent, as the Jews allege, the profanation of the peculiar name of God. For the fame reafon, 1£3, i.e. 9 and 7, are ufed inftead of y, i.e. 10 and 6, to exprefs 16. T, on the French coins, denotes thofe that were llruck at Nantes. When the Roman tribunes approved of the decrees of the fenate, they teftified their confent by fubfcribing a T. T, in Mufic, is the initial of tenor, vocal and inftru- mental ; of tacet, for filence : as adagio tacet, when a per- former is to reft during the whole movement. In concertos and fymphonies, t is the initial of tutti, the whole band, after a folo part. It alfo frequently ftands for trillo, or ft., a (hake. T is alfo a mark or brand, with which by ftat. 4 Hen. VII. every perfon convifted of felony, fave murder, and admitted B to 444076 T A to the benefit of the clergy, (hall be marked on the brawn of the left thumb. T, or Tau, in Heraldry, is a kind of crofs-potent, or truncated ; found in all the armories of the commanders of the order of St. Anthony. The azure T, or Tau, is feen in arms above 400 years old. Its origin, according to fome autliors, is taken from the Apocalypfe ; where the fame is a mark that the angel impreties on the foreheads of the eleA : others take it to re- prefent a crutch, a fymbol proper enough for this order, which was fworn to hofpitality. But the trutli, F. Menef- trier obfervcs, is, that it is the top of a Greek crofier. The bifhops and abbots of the Greek church wear it ftill ; and if it be found on the habit of St. Anthony, it is only to Ihew that he was an abbot. T Bandage, in Surgery, is fo called from its refembling that letter in fhape. It confifts of two bands of linen, of greater or lefler breadth, according to circumftances. The tranfverfe piece of the bandage ferves to go round the body above the hips. The perpendicular portion is fewed at one of its ends to the middle and back point of the band, which furrounds the pelvis ; and its other or anterior extremity is generally flit into two portions, or tails, about fix or eight inches in length. The perpendicular piece of the T bandage applies itfelt between the glutasi mufcles and to the peri- neum ; while the two tails, which we have juft now de- fcribed, are carried between the thighs and the pudenda to the right and left, and are laftly faftened to the tranfverfe piece, which furrounds the body. The T bandage is chiefly employed for keeping on the dreflings, after the operation for the fiftula in ano, in difeafes of the perinaeum, and in thofe of the anus, groins, &c. Befides the common T bandage, furgeons make ufe of another, which they call double, and which is furniflied with two perpendicular pieces, fewed to the tranfverfe one, about four inches apart. The double T bandage is repre- fented to be particularly calculated for cafes of lithotomy, and for difeafes in the perinjeum ; becaufe the two perpendi- cular bands may be made to crofs each other on the part affefted, and leave -the anus uncovered ; an advantage which the fingle T bandage certainly has not. The T bandage admits of application alfo in other modes. When the crofs band is broad, it may be applied round the cheft, while the perpendicular portion, being flit into two, may be made to pafs over the flioulders, fo as to keep the bandage from flipping downward. There is no kind of bandage whicli can be more conveniently applied to the cheft, than that which has juft now been defcribcd. See Bandage. TA, in Geography, a fortified city of China, of the fe- cond rank, in the province of Se-tchuen ; 650 miles S.W. of Pekin. N. lat. 31° 18'. E. long. 107° ij' Alfo, a river of China, w"hicn runs into the Eaft fea, N. lat. 36° 55' E. long. 121° 34'. Ta, Lough, a lake of the county of Wexford, Ireland, not far from Carnfore Point. It receives two or three fmart rivulets, and having no outlet, the waters accumulate, and gradually overflow the adjacent grounds ; till the peafantry, once in three or four years, let them off, by making a cut through the high fand-bank that parts the lake from the fea ; which cut very foon fills up again. Ta, a name given in China to their pagodas. Thefe are moft numerous in hilly parts of the country, upon the fum- mits of which they are frequently erefted. They are gene- rally from { 20 to 1 60 feet high, which height is equal to four or five of their diameters at the bafe ; and they confift moftly of an unequal number, five, feven, or nine giUleries TAB or ilories, diminifliing as they rife, with as many projefting roofs. Ta, Ta, one of the four fyllables ufed by the ancient Greeks in folmifation, or the firft leflbns in finging. TAAIF, in Geography, a town of Arabia, in the pro- vince of Hedsjas, fituated upon a lofty mountain, in a country fo agreeable, that the Arabs compare its environs to thofe of Damafcus and Sana. This city fupplies Jidda and Mecca witli excellent fruits, particularly raifins ; and carries on a confidcrable trade in almonds, which abound in its territories. Near Taaif is the lofty mountain of Gazvan, which, accord- ing to Arabian authors, is covered with froft and fnow in tlie midft of fummer. TAAMBOOTERA, a large town of the Birman empire, on the Irawaddy. TAAPAN, a town on the eaft coaft of Mindanao. N. lat. 7° 38'. E. long. 124^5'. TAAS, or Ta«s, a city of Arabia, in the province of Yemen, fituated at the foot of the fertile hill of Sabber, and encompafled with a wall, between 16 and 30 feet thick, and flanked with feveral towers. Within the circuit of the wall ilands the fortrefs of Kahhre. The city has only two gates, each fortified vi^Ji three towers ; affording a very infufticient defence againft any alTault but that of Arabs, unfldlled in the ufe of artillery. The faint who is the patron of Tases is the famous Ifmael Mulk, reported by tradition to have been once king of this country. His remains are interred in a mofque bearing his name. Near this mofque is a garden, which was poflefled by Ifcliia, his fon. The city has feveral other deferted and ruinous mofques. The laft lords of Taaes have chofen to diftinguifli themfelves, not by mofques, but by noble palaces, and have contented themfelves with a fmall kubbet for their oratory and burial-place. Thefe palaces are now the ornaments of the city. Near the city are the ruins of two ancient cities : one called Thobad, fituated near mount Sabber ; and the other Oddena, upon the fum- mit of mount Sabber, over-againft Kahhre. This was for- merly the refidence of the kings of the country. Its only remains are the ruins of fome mofques. Taass has under- gone feveral revolutions ; but after various events, which we cannot recite, the Imam fent a Dola to this city, and it is now under the fame government as the other cities in his dominions; 48 miles E.N.E. of Mocha. N. lat. 13° 33'. E. long. 44° 10'. TAASINGE, an ifland of Denmark, about 16 miles in circumference, fituated between Funen and Langeland, with a town upon it of the fame name. N. lat. 55". E. long. 10" 37'. TAAUT, TuoYT, or That, in Ancient Mythology, the name of a deity among the Phoenicians, and probably the fame with the Egyptian Thoyt, That, or Hermes, the Theutate or Teutat of the Greeks, and the Mercury of the Latins. His cofmogony has been tranfmitted to us by the Phoenician writer Sanchoniathon, whofe account is preferved by Eufebius, De Prsep. Ev. lib. i. cap. 10. To him the Phoenicians afcribe the firft invention of letters. See Mer- cury. TAAWIRRY, in Geography, an ifland in the South Pacific ocean. There are two fituated within the reef of the ifland of Otaheite, and on the eaft fide of the main ifland. Within thefe iflands there is anchorage within the- reef that furrounds them. The French veffels under ttie com- mand of M. Bougainville lay here. The name of the other ifland is Boourou. TAB, the ancient Arofn, a river of Perfia, in the pro- vince of Fars or Farfiftan, formed by the junftion of two ftreams, "within a few miles of the town of Zeitoon, Both thefe TAB * -"fe ftreams take their rife in tlie recefles of the mountains v>f Fars ; the firfl at the foot of the high hill of Kamarah, and the other near that of Ardicoone, 12 finfungs (tlie furfung being- eftimated at three Englifh miles and three qum-ters) N.W. of Shirauz. This branch of the river is meationed by Arrian in the march of Alexander. It divides Fars from Chufiftan, and pafTes through the centre of the town of Eiidian, being navigable for boats of 20 tons burthen. Nine miles above the town is a ford ; and 1 6 miles below it, the Tab falls into the fea. When the river paffcs Zeitoon, the waters are perfeftly fweet ; but in its courfe over the hills, towards Endian, they become corrupted, and at that place are fo brackifh as to be hardly fit for ufe. TABA, a town of Africa, on the Grain Coaft. Taba IJlatuls, four fmall iflands in the Eaft Indian fea, lying north-weft and fouth-eail near the caft coaft of Borneo. N. lat. 2° 6'. E. long. 1 18° 12'. Taba, or Tabo-feil, in Modern Hijlory, a name by which the Negroes, who inhabit the Gold Coaft in Africa, de- fcribe their king, whofe power is very arbitrary, infomuch that they regard him as a being fuperior in nature to them- felves. TABAB MANAM, in Geography, a town of Abyf- fmia ; 100 miles S.S.E. of Gondar. TABACUM, in Botany, whence comes its common Englifh name Tabacco, or, at prefent, Tobacco. (See Nicotiana.) Bauhin fays, after Monardez, that this ap- pellation is derived from an ifland fo called ; but it ftiould feem to originate from the Indian name of the plant, Tubac, or Tubacka. TABiE, in Ancient Geography, a town of Afia, in Ci- licia. — Alfo, a town of Afia, on the confines of Pifidia, on the coaft of the fea of Pamphylia. — Alfo, the name of three towns in Afia Minor ; one in Caria, another in Perjca, and a third in Lydia. TABAFRA, in Geography, a town of Africa, on the Ivory Coaft ; 15 miles E. of Druin. TABAGO, an ifland in the Pacific ocean, near the coaft of Mexico ; about three miles long, and two broad. It is mountainous, and on the north fide the high land declines with a gentle defccnt to the fea. Near the ftrand the foil is a black mould, and deep, but towards the top of the moun- tain ttrong and dry. The north fide of the ifland makes a very pleaiant appearance', and feems to be a garden of fruit- trees, inclofed with others of the foreft-kind. The prin- cipal produ£ls are plantains and bananas, which grow very well from the foot to the middle of the mountain ; but thofe near the top are fmall, as wanting moiilure. There was formerly a fmall town near the fea, on the north fide of the ifland ; but it was ruined by the privateers that then fre- quented thofe feas. Before it is a good road, about a mile from the fliore, where fliips may ride very fafely in 16 or 18 fathom water ; 18 miles S. of Panama. N. lat. 8° 40'. W. long. 80° 9'. TABAGUILLA, or LittleTabago, a fmall ifland in the Pacific ocean, near Tabago. TABAJANA, a town of Africa, in the country of Woolly ; 1 2 miles W.S.W. of Medina. TABALLAR Point, a cape on the eaft coaft of the ifland of Borneo. N. lat. 2° 12'. E. long. 11 7° 4'. TABALTHA, in Ancient Geography, a town of Africa, en the route from Tuburbum to Tacapse, between Cella; Picentinae and Septimunicia. Anton. Itin. TABALUM, a town of Afia Minor, in the vicinity of Ionia. Herodotus. TABANA, Mankoup, a town in the interior of the Tauric Cherfonefus. Ptol. T A B TABANIE', in Geography, a town of Egj-pt, on the caft branch of the Nile ; 6 miles S.W. of Manfora. TAB ANUS, the 0.-c^ji,in£n/omo/o^j',agenusof theDip- tera order of infetls ; the generic c-harafters of which are, that the mouth has a flefliy probofcis, terminated by two hps, and that the roftrum is. furniftied with two awl-fliaped palpi, placed on each fide of, and parallel to, the probofcis. Gmelin, in his edition of the Linna;an fyllem, enumerates 38 fpecies. The infefts of this genus very much refcmble thofe of the Mufca; which fee. Species. RosTRATUS. With brownifti eyes, and fucker of the length of the body. Baubatus. With black eyes, and fucker half the length of the body. Both thefe fpecies are found at the Cape of Good Hope. Mauritanus. With blackifli eyes, a black fpot on the fecond fegment of the abdomen, and fucker equal to the body. Found in Barbitfy and Spain. BoviNUS. Greenifli eyes ; mark''d down the back by a feries of large, whitilh, triangular fpots, and on each fide Is a fimilar appearance, but lefs diilinft than that of the dorfal row. This is the largeft of the Britifli fpecies, and, like others of its fpecies, is feen generally in the hottcft part of the day, during the middle and the decline of fummer. It is very troublefome to cattle. Its larva is large and dufli(h, and whitifli legs. A German fpecies. RUFICORNIS. With fafciated eyes, white wings, brown fide, and red antenns. Found in America. Paganus. With green eyes, three yellow fafciae, and both fides of the abdomen ferruginoufly fpotted. Found in England. IxALicus. Cinereous, with brown eyes ; obfcure abdo- men, with the bafe palely pellucid. Found in Italy. Cayennensis. With eyes brown before, and behind green ; black abdomen ; the fecond and_third fegments yellow, the reft white at the margin. This and the next are found in Cayenne. Pl'n'c TA rus. Cinereous, with teftaceous eyes, and white wings fpecklcd with black. Inanis. Cinereous, like the former, with brown eyes, and pellucid abdomen, having a brown apex. BoREALls. With eyes having three purphfh fafciae, black abdomen, and the margins of the fegments whitifh. Found rarely in Norway. LoSGlcoRNis. With fpotted eyes, wings half brown, a white fpot, and longer antennje.. Found in Brafil. Striatub. Cinereous, with brown abdomen, and three abbreviated white lines. A Chinefe fpecies. Bidentatus. Ferruginous ; the abdomen having on each fide two yellow fpots, and the fcutellum bidentated. Found in Auftria. Bisi'iNOSus. Brown, ferruginous, abdomen black at the bafe, and fcutellum bifpinofe. Found in Gottingen. M«REK.s. Varied with whitifh and black ; black eyes ; white wings ; fide and fafcia black. Found in Cayenne. Griseus. Black, with greyifli thorax ; the fecond feg- ment of the abdomen having on the hind part a cinereous fafcia, fhe fourth, fifth, and fixth being on both fides cine- reous, and the wings ferruginous. Albipes. With eyes having four fafcis ; the abdomen with a black ring, and the legs white. Found in Bulgaria. M/^RITIMUS. Cinereous, with glafiy wings ; margin and broad fafcia black. Found in Carniola, Auftria, and France. TABARA, in Geography, a town of Spain, in the pro- -yince of Leon; 14 miles N.W. of Zaniora. TABARABA, a river of Mexico, in the proviuce of Veragua, whicii runs into the Pacific occin, N. lat. 8° 40'. W. long. 82^ 48'. TABARCA, a town of Africa, in the kingdom of Tunis, fituated on the north coall, at the mouth of the Zaine, of which Uttlc but ruins are exiiUng, and a fmall garrifon ; 60 miles N.W, of Tunis. TAB TaBARCA, or Tabagurr, an idand in the Mediterra- nean, near the coaft of Africa, at the mouth of the river Zaine, which feparates Algiers from Tunis. The Lomel- lines, a noble Genoefe family, have been in poffeffion of the little ifland that lies before Tabarca, at the mouth of the Zaine, ever fince the time of the famous Andrea Doria, to whom the Tunifeans gave it, with the folemn confent of the grand feignior, in ranfom for one of their princes, whom Andrea had taken captive. This place is defended by a fmall caftle, well armed, and in good order, and pro- teifted the coral fifliery which was carried on in thefe feas. But, in the year 1740, that monfterof princes, Aly Balhaw, the reigning king of Tunis, took it by treachery from the Genoefe ; and, contrary to all juftice and the right of nations, put fome of them to the fword ; and the reft, in num- ber 300 or 400, he carried into captivity. N. lat. 36" 55'. E. long. 9° 8'. Tabarca. See Plana. TABARD, or Taberd, derived from the low I^atin, tabarda, denotes a flaort jacket or coat, open on both fides, with a fquare collar and hanging fleeves. From the wear- ing of this garment, fome of thofe on the foundation of Queen's college, Oxford, are called Taberdarii. From an inn in Southwark, whofe fign was the Tabard, afterwards changed to the Talbot, Chaucer and his compa- nions fet out on a pilgrimage to the fhrine of Becket at Can- terbury ; on which was founded his Canterbury Tales. TAB A RE K, a town of Perfia, in the province of Irak; 8 miles S.E. of Caft)in. ' TABARIA, or Taberayan, or Tabar'teh, anciently Tiberias, a. town of Paleftine, fituated on the weft bank of a lake, called in the fcriptures the " Lake of Gennefareth," and the " Sea of Tiberias," and at the foot of a high and (harp mountain ; furrounded with walls, except towards the water. This town was built by Herod Antipas, to the honour of Tiberius, and was long the capital of Galilee, and after the deftruAion of Jerufalem, for fome time the re- fidence of the high prieft. This city Herod was obliged to people moftly w ith Galileans and ftrangers, becaufe it be- ing built on a ground which was full of fepulchres, the going over which pollutes the Jews feven whole days, he could fcarcely get any of that nation to fettle there, though he endowed it with confiderable privileges, and gave its inhabitants the greateft encouragement, viz. lands to fome, houfes to others, to take off their qualms of con- fcience about treading on dead bodies. At the deftruftion of Jerufalem the town fubmitted to Vefpafian, and received the Jews which efcaped. In the year iioo, it was taken by the Chriftians under Godfrey; but in 11 16, it was re- taken by the Saracens, through the treachery of Ray- mond III. count of Thouloufe. During the time of Chrif- tianity it was the fee of a bilhop, fuffragan of Nazareth. Near it are fome warm baths. The Chriftians have a church here, and the Jews a feminary. In i 759, it fiiffered much by an earthquake; 16 miles S. of Safad. TABAS, a town of Afiatic Turkey, in Natolia ; 34 miles S. of Dignizlu. Tabas, the ancient Tabienne, a town of Perfia, in the province of Chorafan, fituated in a range of hills, 337 miles from Herat and 1 50 from Yezd. It contains a population of about 20,000 perfons, and carries on a trifling trade with Herat and Yezd. TABASCO, a province of Mexico, bounded on the north by the gulf of Mexico, on the eaft by Yucatan, on the fouth by Chiapa, and on the weft by Guaxaca, about 100 miles in length, but narrow. The climate is not rec- koned healthy, nor is the foil remarkable for its fertilitv. The TAB The inhabitants, however, have good farms wcll-ftockL-d with cattle, which fell to good advantage. Tiiey liave alfu great plenty of Indian corn and cocoa-nuts, wliich they fend to Vera Cruz. Moll: of the country is flat and molll, has many marlhes and lakes well-llocked with fifli. It niins nine months out of the twelve, fo that the air is exceffively damp ; and in February, March, and April, remarkably hot, when infinite fwarms of gnats and other infefts are pro- duced. The coaft, from the beginning of September to the end of March, is fubjeft to tempeftuous northerly winds, which render failing dangerous during that feafon. The Spaniards brought hither vines, lemon, orange, and fig trees, which ail thrive here very well. Here are large tiiickets of mangroves and bamboos, and woods of cedar, Brafil wood, &c. frequented by lions, tigers, wild bears, and deer. They have a great number of rabbits, apes, and fquirrels, with the common fruits of America ; and three or four hai-vefts of maize in a year ; befides rice, barley, and all forts of garden-herbs, different fpccies of European fowls, and others to us unknown. This province was ac- cuftomed to pay its tribute to the ancient kings of Mexico in chocolate. Tabasco, a river of North America, which runs into the bay of Campeachy, N. lat. i8° 15'. W. long. 93° 40'. On the banks of this river are fome of the largelt cabbage and cotton trees fuppofed in the world. Tabasco, a town of Mexico, and capital of a province, to which it gives name, called alfo by the Spaniards " Nuef- tra Sennora de la Vittoria," from a great viftory obtained here by Cortez, on his firft arrival. It ftands on an ifland, at the mouth of the river Grijalva, which divides itfelf near the fea into tw© branches, of which the weftern falls into the river Tabafco, which rifes in the mountains of Chiapa ; and the other continues its courfe till within four leagues of the fea, where it fubdivides, and feparates the ifland above mentioned from the continent. Near it are plains, which abound with cattle and other animals, particularly the mountain-cow, fo called from its refembling that creature, and feeding on a fort of mofs found on the trees near great rivers. The ifland of Tabafco, on which the town of that name is built, is about I2 leagues long and 25 broad. The town is not very large, but well-built, and confiderably en- riched by a conftant refort of merchants and tradefmen at Chriftmas. N. lat. 18° 20'. W. long. 93° 46'. TABASHEER, in Mcdiane, a drug of high repute in many parts of the Eaft, the knowledge of which has been communicated to the weftern world by the works of the Indian phyficians, by all of whom it is mentioned as an important article in the Materia Medica ; and it is ftill con- fidered to be adminiflered under this and other names in Turkey and in various parts of India. The Arabian medical writers generally agree, that the Tabafheer is a produftion of the Indian reed. The genuine Tabafheer, according to Dr. Patrick RufTell (Phil. Tranf. vol. Ixxx. p. 275.) is undoubtedly a produftion of the Arundo Bambos of Lin- nsEUS ; and the bamboo in which it is found, is vulgarly called the female bamboo, and diflinguifhed by the large- nefs of its cavity from the male, employed for fpears and lances. The bamboo, however, yields this drug only in a fmall quantity, varying according to the foil or fituation in which the bamboo grows. For a farther account of it, we refer to the Phil. Tranf. ubi fupra. See Arundo. TABASO, in jincient Geography, a town of India, on this fide of the Ganges, between Bynda and Pfeudofiomus. Ptol. V . TABASSERAN, in Geography, a diftrift of the trad of land fituated along the Cafpian fea, between the rivers Terek TAB and Kur, and one of the divifions of the province of Daghcf-- tan, dependent on Perfia. It lies between the Durbach and Rubas, towards their fources ; extending about fix German miles inland from .ibove the territory of Derhent as far as the higheft ridge of the I>efgian mountains, which is here very rocky and woody. Rcineggs calculates the ftrength of the different tribes inhabiting TabafTeran, who, befides the Tar- tarian, fpeak another language peculiar to thcmfelves, at about 10,000 families : and, according to him, the reigning family have held the fovereignty over the country for more than 600 years. See Reineggs' General Hiftorico-topogra- phical Defcription of Caucafus, &c. The town of Tabaf- feran is the refidence of a prince, and the centre of the trade carried on between Perfia and Dagheflan. TABAXIR, in Botany, pronounced Tahajheer, appears to be a Perfian name, appropriated to the Bamboo, Arundo Bambos of Linnaeus, or rather originally to an internal fccre- tion of the ftem of that plant. This is at firfl of a milky afpeft, but fubfcquently concretes into a folid form, and very hard fubflance, compared to fugar, but more like fand or pebbles, being indeed a real filiceous earth. The difcovcry of its true nature was made by Mr. Maeie, now Smilhfon, and pubhfhed in the PhilofophicaFTranfaftions for 1 791, vol. viii. p. 368. See Arundo, and Taba.siif.er. TABAZET, a word ufed by fome writers to exprefs highly-refined fugar. TABBAJEE, in Geography, a town of Africa, in Neola. S.lat. 13° 32'. W.long. 11° 8'. TABBAY, one of the Weftern iflands of Scotland, near the eaft coaft of Skye. N. lat. 57° 16'. W. long. TABBY, a mixture of ftone and mortar, which becomes as hard as a rock, ufed in Morocco. The walls of the city are formed of this fubftance. Tabby, in Co u a kind of thick filk, ufually wa- tered. It ,is manufaftured like the common taffety, ex- cepting that it is ftronger and thicker both in the woof and warp. The watering is given it by means of a calender, the rolls of which are of iron, copper, or wood, which, bearing un- equally on the ftuff, render the furface of it unequal, fo as to refleft the rays of light differently. TABBYING, or Watering, the palling afhiff under a calender, to make the reprefentation of waves on it as on a tabby. It is ufual to tabby mohairs, ribbands, &c. Tab- bying is performed without the addition of any water, or dye ; and furnifhes the modern philofophers with a ftrong proof that colours are only appearances. TABE, in Geography, a river of PrufTia, proceeding from the Niemen, and running into the Curifch-Haff. TABEA, in Ancient Geography, a town of Afia Minor, in the Greater Phrygia. Strabo. TABEIPILLY, in Geography, a town of Hindooflan, in Myfore ; 25 miles W.N. W. of Bangalore. TABELLA, or Tablet, Tabularium, in Pharmacy, a folid kind of eledluary, or confeftion, made of di-y ingre- dients, ufually with fugar, and formed into httle flat mor- fules, or fquares, more ufually called lozenges, and fomctimes morfelli, troches, &c. Powders, fruits, falts, &c. are diflblved with fugar, and made into taiuU, as thofe of the juice of liquorice for colds, &c. We have cordial, Jlnmachic, aperitive, and hepatic tablets. Jellies and broths are fometimes reduced into a f)rt of tablets, to be carried in the pocket, and called packet- f'lup. TabelU manus Chrijli are made of fugar of mfes pearled, TabelU magnanimitatis are a fort taken by feeble old men, I wlien T A IJ when matched with young wives, to aflift them in the affair of concration. Tabeli-.i-; Votlvs, in yinliquity, a name given to certain tablets, which were hung up in tlie temples : for, according to an ancient curtoni, which prevailed all over Greece, fuch as recovered from any dillcmper uied to write in a tablet the nature and fymptoms of their refpetlive maladies, and the remedies which had been n.oll iuccefsful. Tl'^fc tablets Hippocrates is faid to have copied and followed when he firit began to pniftife ; and, if we believe Plli.y (lib. vii. C. 37.), he learned from thcfe the firft rudiments of phyfic. A tablet of this nature was difcovercd at Rome, not many years ago, among the ruins of the ancient temple of ^fculapius, with tliis infcription in Greek. .lUlianus being afflified with vomiting of blood, and abandoned by men, tiie pods hallened to i\is relief, and having nourifhcd him for the fpace of three days with honey, reftored him to his health : for which favour lie came to return them thanks in the pre- fence of the people. Tables of a fimilar kind, under the fame denomination, were hung up in the temples by thofc who had efcaped (hipwreck, &c. TABELLIO, Tabl'laril.v, in the Rom.an law, ?ifcn- •eener ; a kind of officer often confoimded with the notary, notiirius : yet the two differed in this ; that the notaries only drew up and kept the minutes of atts and inftruments on paper, and in notes, or (hort-hand ; whereas the tabclliones delivered them engroflTed fair, on parchment, in the full executory form. The fame alfo put the feals to contrafts, and rendered them authentic. The domeflic clerks of thcfe tabelliones, who at firft wrote under them, in procefs of time came to be called nolariei. Pafquier obferves, that the tabelliones at Rome were public flaves, appointed for the keeping of contradts made between private pcrfons. According to Loyfeau, a con- traft WTitten by a notary was not perfeft, or obligatory, till the tabellio had written it fair : after which, the parties fubfcribed it, /. e. they wrote at bottom, that they ap- proved the contents ; for fignatures were not then in ufe. See Signature. " Quoniam tabellionum ufus in regno Anglise non habetur, propter quod magis ad figilla authentica credi eft necelTe, ut eorum copia facihus habeatur, ftatuimus, ut figillum ha- beant non folum archiepifcopi, et epifcopi, fed eorum ofB- ciales." TABENNE, in Geography, an ifland in the river Nile, between Dendera and the ruins of the ancient Thebes ; famous on account of the retreat of the monk Pacomius and feveral hundred of his brethren. TABENUS Campus, in Ancient Geography, a country of Afia Minor, on the confines of Phrygia and Myfia. Strabo. TABERG, in Geography, a town of Sweden, in the pro- vmce of Smaland, fitr.ated on a mountain of the fame name, which abounds in iron-ore ; 8 miles S. of Jonkioping. TABERISTAN. See Mazanderan. TABERN, in Rural Economy, a term fometimes apphed to a cellar, or other fimilar excavation, for the containing of liquor of the domeftic kind. TABERNA Meritoria, among the Romans, Mars' hofpital, or a place where difabled foldiers were maintained at the charge of the government. TABERNACLE, Tabernaculum, g. d. a tent; among the Jews, was a kind of moveable chapel, fo contrived as to be taken to pieces, and .put together at pleafure, for the convenience of carrying it from place to place, during the BiigratJOD of the Ifraelites ia the wildemefs for forty years. TAB It wa« crcfted by Mofes, in confequence of the expreftf command of God, partly to be a palace of his prefencc aa the king of Ifrael, and partly to be the medium of the moll folemn public worlhip, which the people were to pay to him. It was crcfted on the firll day of the firil month of the fecond year after the Ifraehtes' exodus from Egypt. Exod. xl. 2. 17. 26. 29. 34, 35. The tabernacle was of a reftangular figure, thirty cubits long, ten broad, and ten high ; or, according to Dr. Cum- berland's reduftion to Englifli meafure, fifty-five feet long, eighteen broad, and eighteen high. The two fides and one end were compofed of broad boards, ftanding upright ; each board being about two feet nine inches broad, faftened at the bottom by two tenons in each board, fitted into two mortifes on the foundation ; at the top by links or hafps, and on the fides by five wooden bars, which run through rings or Ilaples in each of the boards. Each fide confifted of twenty of thefe boards, and the end of eight. Both the boards and bars were overlaid with gold ; and the rings and hafps were of the fame metal. The foundation, on which they ftood, confifted of folid blocks of filver, two under each board ; each of which was about fixteen inches long, and weigliing a talent, or about an hundred weight. The num- ber of thefe blocks was about an hundred ; ninety-fix of which were laid under the forty-eight boards, and the other four were the bales of the columns that fupported the veil or curtain, which divided the infide of the tabernacle into two rooms. Hence fome have derived the ancient falhioii of fetting porphyry columns on bafes of white marble. The tabernacle had four different coverings, or carpets, thrown over one another. The firft and loweft was made of fine linen, richly embroidered with figures of cherubims, in ftiades of blue, purple, and fcarlet : and confifted of ten breadths, which were joined together with blue loops and clafps of gold. The next over this was made of a fort of mohair, the breadths of which were joined with clafps of brafs. The third carpet was made of ram's (lrty-white or reddifh fcentlefi cvmofc. with fcaly flower-dalks.— Gathered by Commerfon, Jiaiucrs, the h/.e of the fuil or fecond fpccies. Folhch, .n the illand of Mauritius. The branches are round, forked, large, very blunt, red, fpotted «ath bro«rn ; one of thera generally abortive. 8. T. obtufa. Blunt-leaved Tabernasmontana. — Leaves obovate, obtufe. Panicles terminal, aggregate, forked, level- topped, many-flowered. — Gathered by Commeifon, in the ifle of Bourbon. The haves are three or four inches long, flat, fniooth and fliining, with fine clofe tranfverfe veins ; very obtufe, and often emarginate at the extremity ; tapering at the bale into a fooljlalk about an inch in length. Panicles three, in our fpecimen, at the end of the branch, on ftalks, nearly equal to the adjoining leaves, repeatedly forked, con- fiding of numerous yeWow Jlowers, fmaller than in moil ot the foregoing. We know nothing of the fruit. 9. T. amygdaUfclia. Almond-leaved Tabernsemontana. Jacq. Amer. 39. t. 181. f. 15. — Leaves oval-lanceolate, acute, fmooth and {hining. Anthers projecting out of the tube. — Frequent in woods and thickets at Carthagena. A branching milky Jhrub, fix feet high. Leaves flat, highly pohfhed. Flowers but few on a ftalk, white, powerfully fcented. Filaments in the upper part of the tube, fo that their anthers project above the orifice, in the form of a pointed cone. FoUicLs pointed, green and fhining, refem- bhng thofe of T. citrifolia, but fcarcely half, or one-third, fo large ; their pulp orange. When this fhrub begins to flower, it is moftly without leaves. Jacquin. 10. ^.dif color. Two-coloured Tabernsemontana. Swartz Ind. Occ. 535. Willd. n. 7. Poiret in Lamarck n. 3. — Leaves elliptic -lanceolate, fmooth, tapering at each end. Stalks two-flowered, terminal, thread-fhaped Na- tive of bufliy place's in Jamaica. Sivartz. The Jlem is fix feet high, with fmooth, oppofite branches, quadrangular when young, leafy at the ends. Leaves two or three inches long, ftalked ; dark green above ; pale beneath. rough «-ith minute white tubercles. Leaves three or four inches long, and two or three broad, very fmooth, opaque, (lightly wavy, with one rib, and many tranfverfe veins, on {mooth foolJlaHs three quarters of an inch in length. Pani- tles in pairs from the forks of tlie branches, each cloven and fomewhat fubdivided, divaricated, of about ten apparently white or yellowifh /?owfrj ; their partial ftalks clothed with numerous, roundi/h, imbricated brafleas, gradually larger upward, which we have not feen in any other fpecies. Tube of the corolla above an inch long ; limb fomewhat fliorter, rough with glandular hairs, on the upper fide, about the centre. We cannot refer this to any defcribed fpecies, even in Lamarck. 4. T. odorala. Fragrant Tabernimontana. " Vahl Eclog. Amer. fafc. 2. 22." Poiret in Lamarck Dift. n. 17. ( Cameraria Tamaquarina ; Aubl. Guian. 260. t. 102. C. lutca; Willd. Sp. PI. v. i. 1244.)— Leaves elliptic- lanceolate, pointed, fmooth and (hining, on (hort ftalks. Umbels from the forks of the branches, of about four flowers. Corolla nightly downy externally. — Found by Aublet, on the banks of rivers in Guiana, flowering in May. Vahl was induced by the remarks of Von Rohr to remove this plant hither. (See Cameraria, n. 3.) The /<'ai.« in Aublet's fpecimen are highly polifhed, about four inches long, and above one wide. Partial flower-jlalhs above an inch long, fmooth, naked, fimple. Flowers yellow, with a fweet pleafant fmell ; their Umb longer than the tube, which meafures about three quarters of an inch. 5. T. echinata. Prickly-fruited Tabernaemontana. Aubl. Guian. 263. t. 103. Willd. n. 3 Leaves on (hort ftalks, elliptic-lanceolate, pointed ; fomewhat downy beneath. Um- bels denfe, many-flowered, from the forks of the branches. „, , p . . ■ •■ Follicles muricated. — Native of Guiana, flovi-ering in Au- FootJlaHs bordered, about half an inch in length. Flower- ft. The jlems are numerous, knotty, four or five feet Jlalks very flender, fmooth, one and a half or two inches long, divided rather below the middle, and bearing two whiti(h or yellowi(h Jloivers, with one or two ftraggling bractcas. Tube of the corolla half an inch long ; limb fhorter. The injlorejcence is terminal in Dr. Swartz's own fpecimen, as he defcribes it ; and yet it is called axillary in the fpecific charafter ; perhaps becaufe it is, as in other fpecies, clofely attended by leaves. II. T. multijlora. Many -flowered Tabernaemontana Leaves ellliptic-lanceolate, fmooth, pointed. Stalks lateral and terminal, many-flowered, thread-lhaped, corymbofe. — Gathered by the late Mr. ChriftopLer Smith, in the ifle of Banda. This much refembles the laft in general habit, though the leaves are fomewhat larger, with an oblong ob- tufe point, and more reticulated beneath. 'Yh.e Jlotuers too are rather larger, and differ elTentially in compofing ample, repeatedly fubdivided, corymbofe panicles, about the ends hie Sigh. Leaves five or fix inches long, and two broad, fmooth and green above ; clothed with a flight whitifh down beneath. Flowers fmall, yellowi(h ; their tube dotted with red. The foUiclei are ovate, deflexed, an inch long, covered with crowded foft tubercles, ylublet. We have feen no fpecimen. The author mentions no pulp in the feed-veffels. 6. T. grandiflora. Large-flowered Tabernaemontana. Linn. Mant. 53. Willd. n. 4. Jacq. Amer. 40. t. 31. Lamarck f. 2 Leaves ovato-lanceolate, acute. Stem forked. Segments of the calyx unequal, very lax. — Found by Jacquin in woods at Carthagena, but rarely, flowering from July to September. A Jhruh eight feet high, with iforked divaricated, leafy branches. Leaves three or four inches long, tapering at each end, fmooth and (hining, on (hort ftalks. Flowers large, inodorous, two or three together on a ftalk, at the fide of each uppermoft fork of the branches. Calyx divided into five whitilh, flat, ovate fegments, very of the branches, accompanied here and there by very mi unequal in length, and loofely fpreading, ill agreeing with ^ > z- ■ i. . - rr,. the ufual charafter of the genus ; but the fruit, which is in this cafe much more important, is that of a Tabernemotitana. Its furface is fmooth and green. Jacquin. 7- T. cymofa. Cymole Tabernaemontana. Linn. Mant. 53. Willd. n. 5. Jacq. Amer. 39. t. 181. f. 14 Leaves ovato-lanceolate, acute. Cymes axillary, many-flowered. Stamens in the bafe of the tube. Follicles coloured, re- nute, fcattered, fcale-like braHeas. The corolla feems fle{h- coloured in the dried fpecimen, with long (lender fegments ; its tube an inch long. 12. T. undulata. Wave-leaved Tabernaemontana. " Vahl Eclog. Amer. fafc. s. 20." Poiret in Lamarck n. 5. — Leaves lanceolate-eUiptical, pointed, undulated, fmooth, nearly felTile. Branches forked. Flowers fome- what cymofe. Follicles fmooth. — Native of South Ame- curved, very obtufe — -Frequent in woods and bufliy places rica, and the ifland of Trinidad. The haves are five or fix at Carthagena, flowering in July and Auguft — An elegant inches in length, tipped with a long point ; contrafted at Jhrub, from fix to fifteen feet in height. Leaves flightly the bafe ; bright green above ; pale and yellowifti beneath. wary, half a foot long. Cymes large and handfome, convex, Flo-u/erf three or four together, in fmall, lohtary, axillary TABERN^MONTANA. or terminal, cymofe clujlers. Tube an inch long. Follicles an inch and a half in length, refiexed, even, rather pointed. We have no knowledge of this fpccies, or of the two fol- lowing, but from the autliors quoted. 13. T. heterophylla. Various-leaved Tabemxmontana. " Vahl Eclog. Amer. fafc. 2. 22." Poiret in Lam. n. 7. — " Leaves elliptic-lanceolate ; partly fomcwhat heart- fhaped, pointed, rather \va\-y, fmooth. Branches forked. Flowers racemofe." — Native of Cayenne. The haves im- mediately under the forks of the branches are lanceolate, tliree or four inches long, and moderately (talked : the reft are feffile, much (horter, and almoft heart-fhaped. The Jloiver-Jlalhs are folitary, in the forks as well as at the fum- mits of ' the branches, fmooth and flender, each bearing from five to {evenjlowers, whofe corolla is half an inch long, with fome filky hairs about the mouth. l''abl. 14. T. Pandacaqui. Pandacaqui Tabernasmontana. Poiret in Lam. n. 8. (Pandacaqui; Sonnerat Nouv. Guin. 49. t. 19.) — Leaves elliptic -lanceolate, fmooth, with a blunt point. Panicles axillary, corymbofe, many-flowered, half as long as the leaves Native of the Philippine iflands, where it was found by Sonnerat. He fays the natives of the ifle of Lugon apply the milk of this (hrub to their wounds. The Jlem is four or five feet high. Leaves two or three inches long, fmooth, even, and quite entire, on (hort ftalks. Flotuers white ; their tube an inch long ; limb fcarcely half that length. He did not fee tlie fruit. The younger Linnaeus moft unaccountably referred this plant, in the Supplement, to Chiococca racemofa, with which it accords as little as can well be. It is now, on JulTieu's authority, removed to the prefent genus ; and as he fpeaks decifively on the fubjeft. Gen. PI. 145, we prefume he was acquainted with xhe follicles. 15. T. perjicaridfolia. Knot-grafs-leaved Tabernsmon- tana. Jacq. Coll. v. 4. 139. Ic. Rar. t. 320. Willd. n. 8. Poiret in Lam. n. 9 Leaves lanceolate, fmooth, tapering at each end. Corymbs from the forks of the branches, in pairs, divided. — Native of the ifland of Mauritius. The jlem is fhrubby, ereft, flender, repeatedly branched. Leaves four or five inches long, more or lefs tapering at the end, dark green, Ihining, with a white rib and veins ; their mar- gin (lightly undulated. Footjlalks hardly an inch in leng:th. Flowers yellowifh-white ; their tube and limb each meafuring nearly an inch. We have from Commerfon a fpecimen col- lefted in the ifland above-mentioned, which anfwers to Jac- quin's defcription and figure, except the leaves being lefs elongated ; but it can fcarcely be more than a variety. Another from the ifle of Bourbon would appear to be the fame plant, but its injlorejcence is lateral, from the bofoms of the leaves, not from the forks of the branches. Still we dare not defcribe this as a feparate fpecies. 16. T. neriifolia. Oleander-leaved Tabernaemontana. " Vahl Eclog. Amer. fafc. 2. 21." Poiret in Lam. n. 10. — Leaves lanceolate, fmooth, veinlefs, acute at each end. Clutters axillary, folitary, of few flowers. Limb of the corolla downy about the mouth. Stamens prominent. — Native of Porto-Rico. Allied to the laft. Leaves two or diree inches long, fcarcely wavy at the margin ; paler be- neath ; marked with a few fine lateral diftant ribs. Foot- jlalks half an inch long. Clujlers twice the length of the ibotftalks, each of three or ioxvcjloivers, with a fmall, linear, (deciduous braUea to each of their (hort partial ilalks. Co- rolla about half an inch long, with wedge-lhaped fegments, a little downy on their inner fide towards the bafe. The Jlamens, (we prefume the anthers only,) projeft out of the tube. Fahl. The fpecific charader given by this author Vol. XXXV. being quite infufRcient, we have ventured to enlarge it from his defcription, without feeing the plant. 17. T . mauritiana. Brittle TabernsEmontana. Poiret in Lam. n. 1 1. — Leaves ovate, obtufc, membranous ; fcarcely downy beneath. Cluflers axillary, of few flowers. Branches with brittle joints Gathered by Commerfon in the ifland of Mauritius, and by Sonnerat in the Eaft Indies. We find no fpecimen in our colletlion anfwerable to Poiret's de- fcription. He fays the plant is remarkable for its woody, cylindrical, llriated, fmooth branches being jointed at the in- fertion of the leaves, and very brittle at thofe joints ; bear- ing very fmall, oval, whitifh tubercles. Leaves thin, mem- branous, oval, obtufe, rounded at each end, entire, a httle wav-y at the edges, tlu-ee or four inches long, and two and a half wide ; green and rather (hining above ; paler beneath, and very foft to the touch, but hardly pubcfcent ; ha\'ing one (tout yellowifh mid-rib, with fine parallel tranfverle veins. /'oo//?a//.f thick, from fix to eight hnes in length. Cluf- ters fliort and nearly fimple, towards the ends of the branches, a little drooping. Corolla yellovsifli -white ; it* tube three or four lines long ; limb ftiort and obtufe. Fruit not examined. Poiret. 18. T. Sananho. Sananho Tabernasmontana. " Ruiz and Pavon. Fl. Peruv. v. 2. 22. t. 144." Poiret in Lam. n. 12 Leaves oblong, pointed, fmootli, foraewhat wavy. Cor)-mbs with four or five branches. Brafteas inverfely heart -Ihaped. Follicles roundifli-obovate, pointed. — Native of the extenfive forefts of Peru, flowering in Auguft and September. A Jhrub twelve or fifteen feet high, or more, with fmooth cylindrical branches. Leaves fix or eight inches long, llalked, fliining, fomewhat veiny. Flowers yellowifli-white, lateral and terminal, from fifteen to twenty in each corymb. Corolla large, with a very long angular tube. Follicles the fize of an apricot, of a dirty white, containing many brown ftriated feeds lodged in pulp. Poiret, 19. T. arcuata. Curve-fruited Tabernaemontana. "Ruiz and Pavon Fl. Peruv. v. 2. 22. t. 143." Poiret in Lam. n. 15. — Leaves obovate-oblong, pointed, entire, on (hort flialks. Corymbs axillary, ternate, many-flowered. Fol- licles recurved Common in the great forefts of Peru, about Pozuzo, flowering in November and December. A tree, thirty or forty feet high, difcharging, when wounded, a very copious milky juice, which hardens in the air into a gum-refin of a brown hue. The branches form an ample leafy head, and are forked, pale, flightly compreffed. Leaves eight or nine inches long, on Ihort, ratlier twifted, ftalks. Flowers yellowifli -white, with fmall, oval, pointed braaeas. Follicles oblong, thick, three inches in length, reddifli, full of red wrinkled Tt-t-A, in a crimfon pulp. 20. T. fafciculata. Clufter-flowcr^d Taberniemontana. Poiret in "Lam. n. 14. — Leaves oval-lanceolate, pointed, fmooth, ribbed. Clufters axillary, fomcwhat umbellate, many-flowered. Segments of the corolla linear. Branches jointed.— Native of Cayenne. Seen by Poiret in Lamarck's herbarium. He defcnbes the branches as very brittle at the infertion of the leaves, whicli are ftalkcd, two or three inches long, .in inch or more in width, rather obtufe, though pointed; ftiining above, reddilh beneath. Flowers plenti- ful about the ends of the branches, in fliort, tufted, m- chned corymbs, whofe ramifications are fomewhat forked and jointed, with httle fliort deciduous braaeas. Tube of the corolla but two or three lines long ; limb in five narrow, line.-u-, obtufe fegments. Fruit unknown. If it fliould prove muricated, Poiret thinks this fpecies m.-iy not diffei much from T, echinala of Aublet. See fpecies 5. C 21 T. TABEIIN.EMONTANA. 21. T. corottaria. Garland Tabernimontana. Ait. ti. 3. Roxburgh MSS. (Nerium coronarium ; Willd. Sp. PI. V. 1. 1236. Jacq. Ic. Rar. t. 52. N. divarica- tum ; Linn. Sp. PI. 306. Willd. ibid. Jafminiim zeylani- cum, folio oblongo, flore albo pleno odoratiffimo ; Burm. Zeyl. 129.1.59. Nandi-ervatam ; Rhcede Hort. Malab. V. 2. 105. 107. t. 54, 55.) — Leaves elliptical, pointed, fmooth. Stalks forked, corj-mbofe, from the forks of the branches, as long as the leaves. — Native of the Eaft Indies, in a fandy foil, flowering two or three times in a year. It is faid to have been introduced into the Englifh ftoves by the late Mr. Gordon, in 1770. This plant blooms at various feafons, and is ornainental as well as fragrant, though in- ferior in both refpedls to the Gardenia Jlorida, with which fome of its fynonyms have been confounded. Its genus is now more correftly determined in the fecond edition of Hort. Kew. than in the firft ; but a faulty fpecific charac- ter flill remains, taken (as it feems) from Jacquin's plate, which exhibits a weak imperfefl fpecimen. The Jlem is fhrubby, budiy, fmooth, three or four feet high, with copious forked fpreading branches. Leaves two or two and a half inches long, paler beneath, on channelled /oo/^fl//fj half an inch in length. The corymbs, in various wUd or cul- tivated, fingle or double-flowered, fpecimens before us, con- fift of from three to fix cream-coloured _/?owfrj-, and are elevated on a ftalk, an inch and a half long, always fohtary, from the forks of the branches. The fingle corolla has a rather flender tube, an inch long, with broad fegments to the limb, about the fame length ; but in a double ftate both parts are much enfarged and thickened. Mr. Brown has determined the Nirium divar'tcatiim of Linnseus, erroneoufly marked as biennial, to be the fame plant with the above. We fliall now proceed to enumerate three new fpecies from his Prodromiis. 22. T. orientalis. Smooth Indian Taberna:montana. Brown n. I. — " Leaves lanceolate-oblong, pointed, very fmooth, as well as the branches. Cymes repeatedly compound, fmooth. Brafteas awl-fliaped, not foon deciduous." — Ga- thered in the tropical part of New Holland, by Mr. Brown, who fufpefts the Curutu-Pala, Hort. Malab. 83. t. 46, cited by Linnxus for his T. altertiifolia, fee our 25th fpecies, may belong to the prefent plant, the haves being erroneoufly reprefented as alternate. 23. T. pubefcens. Downy New Holland Tabemsemon- tana. Br. n. 2. — " Leaves elhptic-oblong, fomewhat pointed, downy beneath like the young branches. Branches of the cymes ereft, hairy as well as the calyx. Brafteas very minute, deciduous." — Native of the tropical part of New Holland. M^. R. Brown. 24. T. ebraSeata. Naked-flowered Tabernjemontana. Br. n. 3. — " Leaves fomewhat elliptical, downy as well as the cymes. Branches and flower-ftalks fpreading. Brac- teas none." — Found by Mr. Brown in the fame country as the two lail. We have feen no fpecimens of any of thefe three fpecies. 25. T. alternifolia. Alternate-leaved Tabernsemontana. Linn. Sp. PI. 308. Willd. n. 10. Poiret in Lam. n. 20. (Curutu-Pala } Rheede Hort. Malab. v. i. 83. t. 46.) — Leaves fcattered, ovato-lanceolate Native of fandy ground on the coafl of Malabar, flowering all the year, but efpe- cially in the rainy feafon. A fmall tree, from fix to twelve feet high, a foot in diameter. The leaves are three or four inches long, pointed, on fliort thick footjlalks, more or lefs alternate, or difperfed, according to the figure, which is our only authority for that charafter. Panicles lateral or terminal, corymbofe, drooping, of about nine white fra- grant Jlotxiers, whofe tube is near two inches long, the limb dilated and notched, very much twifted. Follicles tawny, ovate, an inch long, with a recurved point. LinnEus de- pended folely on the Hortus Malabaricus for this fpecies, ef which he had no fpecimen. The circumftance of the alter- nate leaves, unexampled in any known Taberntmontana, has excited a reafonable fufpicion of error. See our 2 2d fpecies. 26. T. bufalina. Buffalo-horned Tabernaemontana. Loureir. Cochinch. 117. (Capficum fylveftre ; Rumph. Amboin. v. 4. 133. t. 67.) — Leaves lanceolate, fmooth. Stalks lateral, in pairs, fingle-flowered, pendulous — Na- tive of moid (hady vaUies in Amboina, and of bufliy places in Cochinchina, where it is called Cay Jung tldu. A Jhrub five feet high, branched, nearly ereft. Leaves oppofite, from five to eight inches in length, ovato-lanceolate, fliining, entire. Flotuers white, on long fimple ftalks. Tube long and flender, inflated at the bafe. FollicL-s rather long, pointed, fwelling, fmooth, with an unequal furface. Seeds oblong, angular, imbedded in red pulp. The fruit in Rumphius's plate is more Hke the following. Lourelro. 27. T. bovina. Bull-horned TabernxmontaJia. Loureir. Cochinch. llB. (Cay fun ^ bo of the Cochinchinefe.) — Leaves lanceolate, fmooth. Stalks axillary, foUtary, nearly ereft, about five-flowered Native of the plains of Cochin- china. A Jhrub four feet high, with drooping branches. Leaves oppofite, entire. Flowers white. Follicles fhort, recurved, tumid, pointed, even in the furface. Seeds roundifh, angiJar, lodged in red piJp. Loureiro, from whofe work and that of Rumphius all our knowledge of the two laft fpecies is derived, attributes to them an emolhent and relaxing quality. Their vifcid milky juice is faid gently to draw out thorns from the flefli. The herbaceous plants, fuppofed by Linnaeus to belong- to this genus, conftitute, as we have already faid, and as Linnaeus himfelf originally thought, a very diftinft one, of which we fliall now treat by the name of Amfonia. We can give no poCtive accoimt of the meaning or origin of thLs name, except that its author, according to Miller, was Clayton. Linnasus, in his own copy of Gronovius's Flora Virginica, cd. I. p. 26, has vmtten Amfonia, as a generic name, to what Clayton took for a fpecies of Nerium, and has fubjoined alfo in manufcript the charafters of the fol- licles and feeds. This plant, in the fecond edition of Sp. PI. is the Tabernimontana Amfonia ; and fo it remained, till Mr. Walter reftored it to rank as a genus ; but without throwing any hght upon the name. A fimilar obfcurity envelopes the nearly fimilar nameof Amasonia, (fee that article, ) which is reported in the vSupplementum of Linnxus to be dedicated to the honour of Amafon, a traveller in America, whom M. De Theis has baptized Thomas. But we have never been able to learn any tidings of fuch a perfon. Whether Amfonia, being an error in orthography for Anfonia, may have been defigned to commemorate the great lord Anfon, who brought home a new efculent pea, and deferved bota- nical commemoration as much as any other eminent naviga- tor not a profefled botanift ; and whether Amafonia be a (till further corruption of the fame name, we muft leave in doubt. We have only to obferve, that if both thefe naiues (honld prove to have the fame origin, or be thought, as they cer- tainly are, too nearly alike, the former, Amfonia, ought to be retained in preference to the latter, which is of much later date. Amsonia. Walter Carolin. 98. Michairx Boreal- Amer. v. i. 121. Purfh 184. Ait. Hort. Kew. v. 2. 72. — Clafs TABERNiEMONTANA. — -Clafs and order, Pentandria Monogynia. Nat. Ord. Con- t*rte, Linn. Apoc'mett, Juff. Brown. Gen. Ch. Cal. Perianth inferior, of one leaf, fmall, in five deep, acute, triangular, fpreading fegments, perma- nent. Cor. of one petal, funnel-(haped ; tube many times longer than the calyx, gradually fwelling upwards, hairy in the throat ; limb about as long as the tlibe, in five deep, lanceolate, varioufly fpreading, oblique fegments. Neftary of five minute glands, furrounding the germen. Stam. Fi- laments five, fmall, infcrtcd into the upper part of the tube ; anthers ereA, arrow-fhaped, converging, within the tube. P'ljl. Germens two, fimple, ovate ; ftyle fohtary, central, thread-fhaped, about as long as the tube ; (ligma oblong, obtufe. Peric. Follicles two, ereft, long, cylindri- cal, pointed, dcftitute of internal pulp. Seeds numerous, pointed, rough, naked, abrupt and oblique at the point. Eff. Ch. Corolla funnel-fhaped ; its limb in five deep oblique fegments. Anthers arrow-(haped, within the tube. Follicles two, cylindrical, ereft. Seeds cylindrical, naked. 1. A. lat'tfolia. Broad4eaved Amfonia. Michaux n. i. Purlh n. I. Ait. n. i. (Tabernjemontana Amfonia; Linn. Sp. PI. 308. Willd. Sp. PI. v. i. 1246. Apocy- num virginiaiium ereftum, alternis afclepiadis foliis, floribus pallida cseruleis, radice crada ; Pluk. Almag. 35. Phyt. t. 115. f. 3.) — Stem fmooth. Leaves ovato-lanceolate ; (lightly hairy beneath. Panicle taller than the lateral branches. Limb of the corolla afcending. — Native of (hady wet woods in Carohna, flowering in May. PurJIj. Culti- vated by Miller in 1759, and hardy in our chmate. The root is flefhy, perennial. Stem herbaceous, eretft, a foot high, round, leafy, nearly or quite fmooth, terminated by a compound fmooth panicle of greyifh-blue fccntlefs^oiyfrj-, and bearing two or three alternate leafy branches, which do not rife above the panicle till the flowers are pall. Corolla very hairy about the mouth ; its tube pale, nearly half an inch long. The leaves are all alternate, on fliort footftalks, entire, pointed, two or three inches in length, and one in breadth ; paler beneath, and minutely hairy about the edges and veins. 2. K.trijlis. Brownifh-flowered Amfonia — Stem fmooth; its branches overtopping the panicle. Leaves ovate ; flightly hairy beneath. Limb of the corolla reflexed. — Brought from North America, by Mr. Lyon. We received a fpeci- men in flower, in June 1808, from Mr. Vere's garden, at Knightfbridge. This is rather taller than the foregoing, and diftinguiftied by its leafy lateral branches rifing high above the panicle. The Jionuers are fmaller, of a dingy brown hue ; the fegments of their limb ftrongly reflexed, at leafl; in fading. Follicles fmooth, cylindrical. Perhaps Mr. Wal- ter might have this fpecies in view when he attributes tawny flowers {J.ores fulvi) to his j1. cilicUa, our 4th fpecies. 3. A. faiuifolia. Willow-leaved Amfonia. Pur(h n. 2. — " Stem fmooth. Leaves linear -lanceolate, acute at each end, very fmooth." — Gathered by Mr. Lyon in Carohna and Georgia, flowering in May. Flowers the fame as the firft fpecies, more abundant. Purjh. 4. A. angujlifolia. Narrow-leaved Amfonia. Michaux n. 2. Purfh n. 3. Ait. n. 2. Venten. Choix. t. 29. (A. ciliata; Walter n. 2. Tabernicmontana anguftifolia ; Willd. Sp. PI. V. I. 1247.) — Stem downy. Leaves linear, ereft, fringed In fandy barren ground of Carohna and Georgia, flowering in May and June. Floiuers of the fame difpofition and colour as in A. latifotia dinAfalicifolia. PurJIi. This fpecies is faid to have been introduced into the Englifh gardens, in 1774, by the late Mr. James Gordon. Its copious narrow leaves are glaucous beneath, and fmooth, except at the edges, where they are fringed with long foft liairs, fach as clotiie iiirjlem. Ventenat fays the upper ones are quite fmoclh, but this is not the cafe in our fpecimen. The teeth of the calyx .ire fomctimcs tipped with a tuft of hairs. Walter fays the flowers are tawny ; others dcfcribc them, as we find tliem, like ihofe of y/. lalifolia, blue, with a pale, or fomewhat tawny, tube. The follicles of all the fpecies, as far as we have feen, are flender, cyhndrical, and fmooth, about two inches long. Tabernj.montana, in Gardening, contains plants of the woody, exotic, and hardy perennial kinds, among which the fpecies chiefly cultivated for garden purpofes are, the citron-leaved tabernacmontana (T. citrifolia) ; the laurel- leaved taberna:montana (T. laurifoUa) ; the Virginian tabcr- nxmontana (T. amfonia) ; and the narrow-leaved taberna:- montana (T. anguilifolia). Thefe are all plants of the more tender and delicate kind, but more efpecially the two firft forts, which require the conftant aid of artificial heat in this chmate. Method of Culture. — All ihefc plants may be increafid by feeds, which muft be procured from the countries where the plants grow naturally, and be fown early in the fpring on a hot-bed ; and when the plants are come up, and fit to re- move, be carefully planted out into fmall pots filled with hght rich earth, and then plunged into a hot -bed of tanners' bark, being careful to fliade them in the heat of the day, until they have taken new root ; after which they fliould have free air admitted to them every day when the weather is warm ; but on cold nights have the glafles of the hot -bed covered with mats every evening, foon after the fun goes off from the bed : they muft. be often refreflied with water, but not in large quantities, efpecially while they are young, as they are full of a milky juice, and are fubjeft to rot with much moifture : they may remain during the fummer feafon in the hot-bed, by fl;irring up the tan to renew xhe heat when it wants it, and a little new tan being added ; but when the nights begin to be cold, the plants ftiould be removed, and plunged into the bark-bed in the ftove, where, during the winter feafon, they mufl be kept in a moderate degree of warmth, and in cold weather have but little water given them : they fliould conftantly remain in the ftove, where, in warm weather, they may have free air admitted to them by opening the glaffes, but in cold weather be kept in a warm ftate. With this management they thrive and produce flowers ; and, as their leaves are always green, make a pleafant diverfity among other tender exotic plants : they may be increafed likewife by cuttings in the fummer feafon, which fliould be cut off' from the old plants, and laid to dry in the ftove five or fix days before they are planted, that the wounded parts may heal over : thefe fliould then be planted in pots filled with frefli hght earth, and be plunged into the hot-bed of tanners' bark, and clofely co- vered with a hand-glafs, fliading them from the fun in the middle of the day in hot weather, rcfrefliing them now and then with a little water : when they have taken root, they may be pknted out into feparate pots, and be treated in the fame manner as thofe railed from feeds are recommended to be. It may be noticed, that the third and fourth forts are ca- pable of living in the open air here, provided they arc planted in a warm fituatloo : they love a light foil, rather moift than otherwife ; of courfe, when planted in dry ground, they fliould be frequently watered in dry weather. They arc beft increafed by off"bets from the roots, which fliould be planted out in the autumnal fcafoiv Among thefe, the two firft forts afi"ord variety in the ftove, and the latter forts in this as well as the borders in mild climates. „„„ C 2 TABER- TAB TABERNiEMONTANUS, James TnEODORE,in£io- graphy, a phyGcian and botanift, was born at Berg-Zabcrn, in Alface, and having praftifed as an apothecary, and ac- quired fomc knowledge of botany, went to France, where he took the degree of M.D. Advancing in his profeffion, he became- firft phyfician to the Eleaor-Palatine, the bifhop of Spire, and other perfons of rank. He died at Heidelberg, whither he had removed from Worms, in the year 1 590. Apprehending that Providence had furnifhed every country with remedies fuitable to its difeafes, he coniided much in the efficacy of herbs ; and particularly in the powder of mugwort. His German Herbal confifts of three volumes, publiflicd fcparately in the years 1558, 1590, and 1592, and containing figures, copied either by himfelf or others from nature. This work was well received, and has been often reprinted. He alfo publiftied in German a treatife on baths and mineral waters. Haller. Eloy. Gen. Biog. TABERNAS, in Geography, a town of Spain, in the province of Grenada ; 15 miles N.N.E. of Almeria. TABERNE, a town of Curdiflan ; 50 miles E.S.E. of Kerkuk. TABES, in Ancient Geogynphy, a town of Afia, in the mountains of Paretacene, upon the frontiers of Perfia and Babylonia. Strabo and Quintus Curtius. Tabes, in Medicine, a wafting or confumption of the body, accompanied with heftic fever. The diftinftion which nofologifts have made between tabes and atrophia, is founded on the prefence of heftic fever in the former, and its abfence in the latter form of difeafc. Such a definition of tabes, however, would comprehend phtliifis, a term which is ge- nerally reftrifted to that fpecies of confumption which has its origin in difeafes of the lungs. (See Consumption.) The ground of the diftinftion between tabes and atrophy, has already been fully difculTed under the head of Atrophy : and the train of fymptoms conftituting the fever that accom- panies tabes, is fufficiently detailed under the article Hedic Fever. Dr. CuIIen has enumerated three fpecies of tabes ; the firft, which he calls the purulent, arifing from fuppura- tion, either of an internal or external part, and the feat of which may be various, according to the organ originally dif- eafed ; the fecond, the fcrofulous, being the confcquence of fcrofula affefting different parts, but more efpecially the mefenteric glands ; and the third, the venenata, proceeding from the operation of a poifonous fubftance received into the body. The other affeftions which had been claffed by Sauvages under tabes, fuch as the tabes dorfalis, nutricum, fudatoria, a fanguifluxu, fyphilitica, and a hydrope, are re- ferred by Dr. CuUen to the genus Atrophy ; which fee. Tabes Dorfalis, a fpecies of confumption arillng from the excelTive evacuation of femen : its fymptoms and treatment are detailed under Atrophy. Tabes Mefenlcrlca, or mefenteric confumption, is a dif- eafe that more paiticularly affefts children, and arifes from obftruclion and enlargement of the mefenteric glands. Children are liable to its attacks from the age of three or four years, and become lefs fo when they have attained that of eight or ten, unlefs they are of fcrofulous habits, in which cafe the difeafe may fupervene at a much later period. Its relation to fcrofula is clearly marked, from its more frequent occurrence in families where this difeaie is hereditary : but it may, at the fame time, arife independently of that affec- tion, from a great variety of caufes. It may be induced by any protrafted difeafe of infancy producing much conftitu- tional difturbance, and more efpecially by fuch as are at- tended with diforder of the funftions of the alimentary canal. It may often be traced to improper treatment, or unwhole- fome food ; to long-continued irritation from teething ; to TAB the fupprefTion of eruptions, or the incautious ftopping of diarrhoea ; and fometimes appears to be the confequence of exanthcmatous fevers, as the meafles, fmall-pox, or fcarlatina. The prefence of worms in the inteftines, has very frequently been accufed of laying the foundation of this difeafe : but it may be queftioned, whether tliey are not more generally the confequence than the caufe of derangement in the primae via; attendant on this diforder. The fymptoms which attend the early ftages of this affec- tion, and before the enlargement of the glands has become fen- iible,are fimilar to thofe which accompany many of thedifeafes of the alimentary canal, more efpecially thofe produced by worms, and can hardly be diftinguifhed from them. Indi- geftion occurs in various degrees, denoted by the ufual figns, fuch as acid eruftations, fetid breath, great in-egu- larity in the adfion of the bowels, and in the appearance of the llools ; occafional fever, occurring, however, lefs in regu- lar paroxyfms tlian happens in the remitting fever of infants, but giving a heft ic flulh to the cheeks, which, when the fever has iubfided, are of a pallid hue. The appetite is extremely- irregular ; fometimes it is nearly gone, at other times it is voracious, and attended with a fenfe of craving, unlefs fpee- dily fatisfied. The fymptom which particularly charafter- ifes this difeafe, when occurring in conjunftion with thofe above ftated, is fhooting pains in the abdomen, varying con- fiderably, both in their feat and their intenfity-, at different times. Thefe pains, though felt more or lefs every day, occur only at intervals, and frequently, after a longer inter- mifTion than ufual, they return with more feverity thaa before. The belly now begins to fwell and to grow hard, while, at the fame time, the limbs and countenance are emaciated : the ftrength and fpirits decline ; the heftic fever is more and more diftinftly marked, and exerts its ufual undermining influence on the conftitution. Cough frequently attends this complaint in its latter ilages, and the fyniptoms become blended with thofe of true pulmonary confumption. The difeafe of the mefenteric glands is often, indeed, found, on dif- feftion, to have extended to other vifcera, and more efpecially to the lungs : and tubercles, and even purulent matter, are not unfrequently found in them, although the fymptoms during life did not particularly indicate any affeftion of thefe organs. The mefenteric glands themfelves exhibit different appear- ances, according to the progrefs which the difeafe has made : in the early ftages they are enlarged in their fize, and are fomewhat fofter to the touch than in a natural ftate : but upon being cut into, do not exhibit any fenfible deviation from their natural ftrufture. If the patient, however, has not already funk from the exhauftion of the conftitutional affeftion, the difeafe proceeds to fuppuration, the pus being intermixed with the white, foft, and curdy matter which is fo peculiar to fcrofula. Mefenteric confumption is a difeafe of frequent occur- rence, and when it has proceeded a certain length, is almofl invariably fatal. Yet we find, in fome rare inftances, that the powers of the conftitution are fometimes called forth in an extraordinary manner under the moft unpromifing circum- flances, and the difeafe recovered from. In the early periods of life, indeed, we fee nature abounding in rcfources, which a more mature age cannot fupply : and there is, to ufe the language of the late Dr. Gregory, " a greater luxuriancy of life and health in infancy than at any other period. In- fants, it is acknowledged, are more dehcately fenfible to injury than thofe advanced in life ; but to compenfate this, their fibres and veffels are more capable of diftention, their whole fyftem is more flexible, their flvuds are lefs acrid, and- lefs difpofed to putrefcence ; they bear all evacuations more eafily, T A B cafily, except that of blood ; and, which is an important circumftanee in their favour, they never fuffer from tiic terrors of a diftratled imagination. Their fpirits are hvely and equal ; they quickly forget their palt fuffcrings, and never anticipate the future. In confequencc of thefe ad- vantages, children recover from difcafes, under fuch unfa- vourable circuni fiances as are never furvived by adults. If they vvafle more quickly under ficknefs, their recovery from it is quick in proportion, and generally more complete than in older people ; as difcafes feldom leave thofe baneful efteds on their conilitutions fo frequent in adults. In Ihort, a phy- fician ought fcarce ever to defpair of a child's life, while it continues to breathe." The plan of treatment to be purfued in this difeafe, mud be founded very much on the fame principles as that of fcrofula in general, modified, however, in fome degree, by its peculiar feat, and by the funftions of the parts affefted. It is chiefly in the earlier ilages that we can expetl much efficacy from an alterative courfe of remedies in the re- moval of the glandular obftruftions. As there is often much ambiguity between the fymptoms of this difeafe and thofe occafioned by the prefence of tiie round worm in the intef- tines, we fhould firft fatisfy ourfelves that this is not the fole caufe of the diforder. In both difeafes there is a tumid belly, and emaciated extremities : fo that the chief ground of dillinftion is derived from the effeft of ftrong purgatives, which bring away worms in the one cafe, and none in the other. It is obferved by Dr. Baillie, that ilartings and grinding of the teeth during fleep, occur very commonly in worms, but are rarely obferved as fymptoms of fcrofulous enlargement of the mefenteric glands. Some difcrimination, likewife, between the two difeales, may fometimes be derived from examining ftritlly into the nature of the conftitution. If decided marks of fcrofula fliew themfelves in an external part of the body, they will lead a praftitioner more fatisfac- torily to the opinion, that the mefenteric glands are alfo affeiied with the fame difeafe. The principal alterative remedy on which any dependence can be placed is mercury, particularly in '^'le form of calo- mel ; half a grain, or a grain of which, may be given two or three times a week, in conjunftion with, or fucceeded by, fome mild purgative. On the intermediate days, fmall dofes of alkalies, with rhubarb, may be exhibited. Great atten- tion (hould, at all times, be paid to the (late of the bowels, which fhould be kept freely open : while the acrimony of their contents fhould be counterafted by abforbents, fuch as magnefia, when there is no diarrhoea, or by prepared chalk, or gentle aftringents, in fmall dofes, when this latter Ifate prevails. For the removal of fever, the fame means are to be employed as have already been pointed out when treat- ing of the infantile remitting fever, under the head of Dif- eafes of Infants. The calomel, combined with purgatives, may be continued, for feveral weeks, till a favourable change has been efFefted in the fize and hardnefs of the belly. The milder vegetable tonics, fuch as chamomile, or cafcarilla, may then be tried, and according as the conftitution will bear them, preparations of iron fhould be given, in order to flrengthen the digeftive organs, and the fyftem in general. Together with thefe means, every circumilance which can contribute to general health fhould be attended to. Pure air, regular exercife, gentle friftions of the body and limbs, an eafy drefs, frequent wafhing of the whole body with foap and warm water in young children, or the cold bath in older children, and efpecially a light and nutritious diet, with fuch mild aromatics as may affift digeftion, are fome of the prin- cipal and moil effeftual means of fecuring the ground that has been gained, and of preventing a retiurn, as well as 6 TAB guarding againft an attack, of the difeafe. For greater de- tails on thefe points, fee Difeafes of Infants, and Scro- fula. TABEYRO, in Geography, a town of Spain, in Ga- hcia ; 5 miles S.E. of St. Jago. TAI5IANA, m /Indent Geography, an ifland of the Per- fian gulf, near and well of the ifle of Sophthc, and over- againil the promontory of Taoee. Tabiana, in Geography, a town of the duchy of Parma ; 1 3 miles W. of Parina. TABIDIUM, in ylnciait Geography, a town in the in. terior of Africa, towards the fource of the river Bagrada. TABILLOLA, in Geography, a town on the foutli coafl of the ifland of Machian. N. lat. 0° 13'. E. long. 127° 21'. TABINSK, a town of RufTia, in tiie government of Upha, on the Bielaia ; 40 miles S. of Uphj. N. lat. 54". E. long. 56" 14'. TABLADA, a town of South America, in the pro- vince of Carthagena ; 80 miles S. of Mompox. TABLANATZ, a town of lilria ; 24 miles N.E. of Pedena. TABLAS, one of the Philippine iflands, about 25 miles long from north to fouth, but narrow and interfered by a deep bay on the eaft and well coails. N. lat. 12° 30'. E. long. 121° 40'. TABLATURE, in Anatomy, a divifion or parting of the fl and fome other authors. The Latin is very old and baibarous, and remarkably obfcure. See Civil Law. Although thefe venerable monuments of antiquity were confidercd as the rule of right and the founiain of juftice, tJiey were overwhelmed by the weight and variety of new laws, which, at the end of five centuries, became a grievance more intolerable than tlie vices of the city. The laws of the twelve tables have been juftly charged with inexcufable feverity. They are written, fays Mr. Gibbon, like the ftatutes of Draco, in charafters of blood. They approve the inhuman and unequal principle of retalia- tion ; and tlie forfeit of an eye for an eye, a tooth for a tooth, a limb for a limb, is rigoroufly exaftcd, imlcfs the offender can redeem his freedom by a fine of 300 lbs. of copper. Befides the flighter chaftifements of flageHation and fervitude very liberally diftributed by the decemvirs, nine crimes of a very different complexion are adjudged worthy of death: vl%. i. Any aft of treafon againft the ilate, or of correfpondence with the public enemy ; 2. Noc- turnal meetings in the city, under any pretence of pleafure, or religion, or the pubhc good ; 3. The murder of a citizen ; 4. The malice of an incendiary ; 5. Judicial perjury ; 6. The corruption of a judge, who accepted bribes to pronounce an iniquitous fentence ; 7. Libels or fatires ; 8. The nofturnal mifchief of damaging or deftroying a neighbour's corn ; 9. Magical incantations. The cruelty of the twelve tables againft infolvent debtors merits pecuhar notice. After the judicial proof or confeflion of the debt, 30 days of grace were allowed before a Roman was delivered into tlie power of his fellow-citizen. In this private prifon, 1 2 ounces of rice were his daily food : he might be bound with a chain of 15 pounds' weight ; and his mifery was thrice expofed in the market-place, to folicit the compaffion of his friends and countrymen. At the expiration of 60 days, the debt was difcharged by the lofs of liberty or hfe : the infolvent debtor was either put to death, or fold in foreign flavery beyond the Tyber ; but if feveral creditors were alike obftinate and unrelenting, tliey might legally difmember his body, amd fatiate their revenge by this horrid partition. When the manners of Rome were infenfibly poli(hed, the criminal code of the decemvirs was aboliflied by the hu- manity of accufers, witneffes, and judges ; and impunity became the confequence of immoderate rigour. The Por- cian and Valerian laws prohibited the magiftrates from in- llifting on a free citizen any capital, or even corporal punifhment ; and the obfolete ftatutes of blood were artfuUy, and perhaps truly, afcribed to the fpirit, not of patrician, ' but of civil, tyranny. Gibbon's Decl. and Fall, &c. vol. viii. Tables of the Law, in Scripture Hifiory. See Deca- logue. Tables, New, Tabulit Novd, an edift occafionally pub- lifhed in the Roman commonwealth, for the abolifhing all kinds of debts, and annulling all obligations. It was thus called, in regard that all anteotdent afts being deftroyed, there were nothing but new ones to take place. TAB Table, among Jewellers. A table diamond, or other pre- cious ftone, is that whofe upper furface is quite flat, and only the fides cut in angles : in which fenfe, a diamond cut table-wife, is ufed in oppofition to a rofe-diamond. See Diamond. Table, in the Glafi-Manufaflure, denotes a circular fhcet of finilhed window-glafs. 1 hefe tables are generally four feet in diameter, and each of them weighs 10, 10^, or i i pounds. Twelve of thefe is called zfide or a crate of glafs. Some tables of glafs have been four, and even five feet in diameter. Such have been made by MelTrs. Attwood and Smith, formerly Hammond and Smith, of Gatefhead, in tlie county of Durham ; and thefe tables are the more valua- ble, as they yield larger fquares than ever were made, except in plate-glafs, and die quality alfo is of the bcft kind. The centre of the table of glafs, where the punting iron was at- tached, is of coiu-fe fomewhat tiiicker, and is denominated by the workmen " bull's eye :" nevcrthelefs, the reft of the plate is of an uniform tliicknefs. Table is alfo ufed for an index, or repertory, put at the beginning or end of a book, to direft the reader to any paf- fage he may have occafion for. Thus we may fay, table of matters ; table of authors quoted; table of chapters. Sec. Tables, of themfelves, fometimes make large volumes, as that of Dravitz on the civil and canon laws. Tables of the Bible, are called Concordances. See Cox- CORDANCE. TA^LE-Rents:. See Bord-lands. Tables of ffoufes, among /tflrologers, are certain tables, readily drawn up, for tlie afliftanec of praftitioncrs in that art, for tlie erefting or drawing of figures or fchemes. Ste House. Tables, in Mathematics, are fyftem« of numbers, calcu- lated to be ready at hand for expediting aftronomical, geome- trical, and other operations. See Canon. Tables, Aflronomical, are computations of the motions, places, and other phenomena of the planets, both primary and fecondary. See each planet. The oldeft aftronomical tables are the Ptolemaic, found in Ptolemy's Almageft ; but thefe now no longer agree with the heavens. In 1252, Alphonfo XI. king of Caftile, undertook the correftion of them, chiefly by the afliftance of Ifaac Ha- zen, a Jew ; and fpent four hundred thoufand crowns there- in. Thus arofe the Alphonfme tables, to which that prince himfelf prefixed a preface. But the deficiency of thefe, alfo, was foon perceived by Purbachius and Regiomon- tanus ; upon which Regiomontanus, and after him Walthe- rus and Warnenis, applied themfelves to celeftial obferva- tions, for the farther amending of them ; but death pre- vented any progrefs therein. Copernicus, in his books of the celeftial revolutions, in- ftead of the Alphonfine tables, gives others of his own cal- culation, from the latter, and partly from his own ob- fervations. From Copernicus's obfervations and llieories, Eraf. Rein- holdus afterwards compiled the Pruttnu tables, whicli liave been printed feveral times, and in feveral places. Tycho de Brahc, even in his youth, became fenfible of the deficiency of the Prutenic tables ; which was what deter- mined him to apply himfelf, with fo much vigour, to celef- tial obfervations : yet all he did, by tliem, was to adJTift the motions of the fun and moon ; though Longomontanus, from the fame, to tlie theories of the feveral planets pub- lifhed in his " Aftronomia Danica," added tables of their motions, now called the Dani/h tables ; and Kepler likewife, from T A B from the Tame, in 1627, publilhed the Rudolphlne xMes, which are much i-ilvcmcd. Tliefc wt-ro afterwards, amio 1650, turned into another form, by Maria Cunitia, whofe allroiiomical tables, com- prehending the effeA of Kepler's phyfical hypothefis, are cxcotdinjrlv eafy, and fatisfy all the phenomena, without any trouble of calculation, or any mention of logarithms ; fo that tlie Rudolpiune calculus is here greatly improved. Mcrcator made a like attempt in iiis Aftronomical Inllitu- tion, pubhihed in 1676, and the hke did J. Bap. Morini, whofe abridgement of the Rvidolpiiine tables was prefixed to a Latin verfion of Street's " Ailronomia Carohna," pub- lifhed in 1705. Lanfbergius, indeed, endeavoured to difcredit the Ru- dolphine tables, and framed Pirpttual tables, as he calls them, of the heavenly motions ; but liis attempt was never much regarded by the aftronomers ; and our countryman Horrox warmly attacked him, in his defence of the Kep- lerian ailronomy. Since the Rudolphine tables, many others have been publithed ; as the Philolak tables of Bullialdus ; the Brl- lannk tables of Vincent Wing, calculated on BuUialdus's hypothefis ; the Britannic tables of Newton ; the French ones of the count de Pagan ; the Caroline tables of Street, all calculated on Dr. Ward's hypothefis, and the Novalma- jejiic tables of Ricciolus. Among thefe, however, the Philolaic and Caroline tables are efteemed the beft ; info- much that Mr. Whiilon, by the advice of Mr. Flamfteed (a perfon of undoubted authority in fuch cafes) thought fit to fubjoin the Caroline tables to his aftronomical leftures. The Ludovician tables, publiihed in 1702, by M. de la Hire, are conftrufted wholly from his own obfervations, and \vithout the alTiftance of any hypothefis ; which, before the invention of the micrometer, telefcope, and the pendulum clock, was held impoffible. Another fet of tables, Dr. Halley, the aftronomer royal, long laboured to perfeft. M. le Monnier, in 1746, pubhdied in his " Inftitutions Aftronomiques" tables of the motions of the fun, moon, and fatellites, of refraftions, and of the places of the fixed ftars. M. de la Hire has alfo publiihed tables of the planets, and M. de la Caille tables of the fun. Mayer conftrufted tables of the moon ; and we have many aftronomical tables of va- rious kinds, and computed with different views, in our mo- dern books of aftronomy, navigation, &c. For an account of feveral, and efpecially of thofe pubhfhed annually under the direftlon of the commifGoners of longitude, fee Alma- nac, Ephemerides, and Longitude. For Tables relating to annuities, &c. fee Annuities, Expectation of Life, 'L,its.-/innuities, Mortality, and Survivorship. Tables, Sexagenary. See Sexagenary. For Tables of the Stars, fee Catalogue and Star. Tables of Sines, Tangents, and Secants, of every degree and minute of a quadrant, ufed in trigonometrical opera- tions, are ufually called Canons ; which fee. See alfo Sine. Tables of Logarithms, Rhumbs, ufed in geometry, navi- gation, &c. See Logarithm and Rhumb. Tables, Loxodromic, are tables in which the difference of longitude, and quantity of the way in any rhumb, are exhi- bited to every ten minutes of every degree of the quadrant ▼ariation of the latitude. See Rhumb. Table of Heights, in Enghfh feet, from the level of the fea. The Cafpian fea, lower by - - - - 306 The Thames at Hampton, Roy ... 144 The Tiber at Rome ..... j 5 TAB The Seine at Paris, mean heiglit - - - 36; The Thames, at Buckingham-ftairs, 15V feet below! the pavement in the left-hand arcade - - y ^^ By barometrical comparifon with the Seine and the Mediterranean ; but this height is probably too great. Roy fuppofes the low water of the fpring tides at Ifleworth to be only one foot above the mean furface of the ocean. He allows feven feet for the difference of the low water at the Nore and at Ifleworth, and taking 1 8 feet for the height of tlie fpring tide, adds one-third of this for tlie mean height of the fea. At Hampton, the Thames is 13!,, feet above low water-mark at Ifle- worth. The pagoda in Kew gardens, from the ground i l6i The well end of the Tarpeian rock - - 151 The Palatine hill 166 The Claudian aqueduft, bottom of the canal - 208 The Janiculum ...... 293 The crofs at St. Paul's, from the ground - . 340 St. Peter's, fummit of the crofs - - - 535 From the ground 47 1 Arthur's feat, from Leith pier-head - - 803 Lake of Geneva ..-..- 1230 Its greateil depth 393 Mount Vefuvius, bale of the cone ... 202 1 Skiddaw ....... 3270 Chamouny, ground floor of the inn ... 3367 Mount Vefuvius, mouth of the crater . - 3938 For the heights of other mountains, &c. ; fee Moun- tain. It may be obferved, with refpeft to general Roy's calcu- lation of the mean height of the fea, that it does not appear that in rivers, or even in narrow feas, we ought to add one- third of the height of the tides only to that of low water, in order to find the level ; for it is probable that even the original tides may often refemble thofe of lakes, wliere, for want of breadths, the effefts of a fpheroidical tide cannot take place, and the elevation and depreflion are very nearly- equal. Table, in Heraldry. Coats, or efcutcheons, containing nothing but the mere colour of the field, and not charged with any bearing, figure, or moveable, are called tablet d^attente, tables of expeifalion, or tabula raftt. Table Bay, in Geography, a bay fituated on the well coaft of the fouthern extremity of Africa, near which are the fort and town of the Cape of Good Hope. This bay is formed by three lofty mountains. Cape Town, the capi- tal of the colony, lies on the S.E. angle of the bay. The primary objeft to which Table bay is fubfervient, is the con- venience of a plentiful ftream of pure limpid water, rufh. ing out of the mountain, and this circumftance determined the firft fettlers in their choice of the fcite for the town. If this had not been the cafe, the firft fettlers would unquef- tionably have given the preference to Saldanlia bay, the only defeft of which is the want of frefh water near it ; whereas Table bay is faulty in every point that conftitutes a proper place for the refort of fhipping, and fo boifterous for four months in the year, as totally to exclude all (hips from entering into it. The anchoring ground in tliis bay is tolerably good ; but the fiiifting of the fand leaves bare fometimes whole ridges of the fame kind of hard blue fchif. tus that appears every vvhere on the weft (hore of the bay. Thefe ridges are fo (harp, that a cable that comes acrofs them will be cut in pieces. Hence it has happened, that the bay is fiJl of anchors, which have never been fifhed up, and thefe contribute, as well as the rocks, to cut and chafe the TAB the cables of (hips. If fome pains be not taken to remove the anchors, the number of which is annually incrcafing, a clear anchorage for a fingle large fhip will not be found. It has been propofed to fuik mooring-chains for large fliips, inftead of their lying at anchor. During the S.E. winds, which blow from September to the end of April, and which is the feafon when all fhips bound for the Cape re- fort to Table bay, the only danger is that of their being driven out to fea from the wear and tear of the cables. However, as the fea is not high, it is hardly pofTible for a fhip to go on (hore, unlcfs it be on the S. point of Robben ifland, which being diftant feven or eight miles, may be always avoided. Within this ifland and the continent there is excellent anchorage, where fhips fo driven out ufually bring up. Here alfo fhips intending to come into Table bay generally wait the abatement of a S.E. wind, if it fhall happen to blow too llrong for their working up againft it. This ifland is too fmall and too far to afford the leail fhelter to Table bay from the N. W. winds that blow in the winter months. Naval officers feem to be divided in opinion as to the preference of Table bay or Simon's bay, (fee Simon'j Bay,) which lies on the eaftern fide of the peninfula, in the great bay of Falfe, and which is the ufual refort of (hipping for five months in the year. Both are defeftive, but the latter appears to be more fecure, from the circumftance of few, if any, fhips having been ever known to drive on (hore from their anchors, whilft fcarcely a feafon palfes without the lofs of fome in Table bay. In the winter months, when the wind blows from N. to N.W., 40 or 50 (hips may lie at anchor perfeftly fecure in Simon's bay, and eight or ten may be fufficiently (hcltered in the Ifrongeft fouth-eaftern. From a furvey of the Great Falfe bay in 1797, the exaft fituation was afcertained of a very dangerous rock, placed direftly in the paffage of (hips into Simon's bay. The months in which (hips ufually refort to this bay, are from May to September inclufive. The dif- tance from Cape Town, being 24 miles, and the badnefs of the road, moftly deep fand and fplafhes of water, render the communication at all times difficult, but more efpecially in winter ; and few fupplies are to be had at Simon's town, a name given to a coUeftion of about a dozen houfes. We have a chart of this bay in the fecond volume of Barrow's Africa. S. lat. 53° 50'. E. long. 18° 15' Alfo, a bay on the E. coaft of Labrador. N. lat. 53° 44'. W. long. 20° 57'. Table IJland, a fmall ifland near the coaft of Spitz- bergen. N. lat. 80° 57'. E. long. 20° 30'. — Alfo, one of the New Hebrides, in the South Pacific ocean. S. lat. 15=38'. E. long. 167° 7' Alfo, a fmall ifland in the Eaft Indian fea, near the ifland of Paraguay. N. lat. 9° 15'. E. long. 118° 2' Alfo, a fmall ifland in the Eaft Indian fea. N. lat. 14° 8'. E. long. 93° 32'. Table Mountain, a mountain of Ireland, in the county of Wicklow ; 15 miles W. of Wicklow. — Alfo, a moun- tain of Africa, near the Cape of Good Hope, fo called from its flat fummit. In fine weather this mountain is vifible at fea at the diftance of 28 or 30 miles. Table mountain fnpplies Table bay and Hout bay with ftreams of water. Table Mountains, mountains of North Carolina. N. lat. 36°. W. long. 81° 40'. Table Point, a cape on the S. coaft of the ifland of Bali. S. lat. 8° 45'. E. long. 1 15° 1 1'. Table River, a river of Louifiana, which runs into the MifTifippi, N. lat. 37° 12'. W. long. 90° 11'. Table-ZF/jic/, in Rope-Making. To lay ropes, &c. from a fix-thread line to a two-inch and half rope, a table-wheel is fixed in the wheel-houfe, at the upper end of the rope-walk. Vol. XXXV. TAB in a frame fixed in the ground, with two Aiding checks. The -bands which work the whirls, go feparatcly over each whirl, and ro\nid the turning-wheel. Some have fix fets of whirls of dilferent fizcs, with iron fpindles, and nibbed or fore- lock hooks at the outer end. A tackle-board, twelve inches broad, and three inclies thick, wit!, fix holes for the hooks to go through, is fixed above the cheeks upon cleats. TABLEAU, Fr. This word is ufed frequently in mudc, fays Roufllau, to cxprei's the whole defign of a compofition in tlie fcore : as " this fcore is quite a pidure ;" " this opera is full of admirable paintings and imitations of nature." TABLET, in Pharmacy. Sec Tabella. lABLIER, Le, in Geography, a town of France, in the department of the Vendee ; 6 miles S.S.E. of La Roche fur Yon. TABLING of Fines, is the making a table for every county, where his majefty's writs run ; containing the con- tents of every fine pa(fed each term. It is to be done by the chirographer of fines of the com- mon pleas ; who, every day of the next term, after engroff- ing any fuch fine, fixes one of the faid tables in fome open place of the faid court, during its litting ; and likcwife de- hvers to the flieriff of each comity a content of the faid tables made for that refpeftivc county, the term before the aflizes, to be affixed in fome place in the open court, while the juftices lit. Tabling, in Ship-BuiUing, letting one piece of timber into another by alternate fcores or projeftions from the middle, fo that it cannot be drawn afunder either lengthwife or fidewife ; fuch are beams, &c. Tabling, in Sail-Making, a broad hem made on the (liirts of fails, by turning the edge of the canvas over and fewing it down. It is to ftrengthen the fail for fewing on the bolt-rope. TABO Dagrou, or Little Dieppe, in Geography, a town of Africa, on the Grain Coaft. Tabo Dune, a fea-port of Africa, on the Ivory Coaft ] 90 miles from Cape Palmas. TABOA, a town of Portugal, in the province of Beira, on the Mondego ; 9 miles S. of Vifeu. TABOCANA, a town of Africa, in the kingdom of Quoja. N. lat. 5° 55'. TABOCURU, a river of Brafil, which runs into the Atlantic, near the ifland of Maranhao. S. lat. 2° 40'. W. long. 45° 30'. TABOGA. SeeTABAGO. TABOLATO, a town of Mexico, in the province of Cuhacan ; 30 miles W. of Culiacan. TABON, in Natural Hi/lory, a name given by the people of the Philippine iTlands to a bird called in other places daie, and remarkable for the largenefs of its eggs ; though fome accounts of thefe are certainly fabulous. TABONES, in Geography, one of the fmall Philippine iflands, near Mafljate. N. lat. 12° 12'. E. long. 123° 5'. TABOO, a town of Africa, and capital of a countr)-, fituated to the E. of Sahara. N. lat. 24°. E. long. 12° lo'. Taboo, a term ufed in the Sandwich iflands to denote a kind of religious intcrdiftion, of very powerful and extenfive operation. With places and perfons that were tabooed, all intercourfe was prohibited. The word was alfo ufed to ex. prefs any thing facred, or eminent, or devoted. Cook'* Third Voyage, vol. iii. p. 164. TABOR, or Hradijlie Hory Tabor, i. e. the camp of Mount Tabor, in Geography, a town of Bohemia, in the circle of Bechin, founded by the Huflites, fituated on a mountain, near the river Luznice, is naturally ftrong, and D it TAB it is fortilied in the ancient manner, with a ditch, walls, and bulwarks. It had been the camp of John Zilka in tlie year 1420, and was raifed to a royal borough by the emperor Sigifmund. It was taken by llratajrem by Rodolph II. in l6i?, ajid alfo in 1621, 1648, and 1744; 10 miles N.E. of Bechin. N. lat. 49° 27'. E. long. 14° 28'. Tabok, Mnunl, a mountain of Palelliue, frequently m'-n- tioned in the Old Teftamcnt. (See Jofh. xiv. 22. Judg. iv. 6. 12. Pf. Ixxxix. 12. Jer. xlvi. 18. Hof. v. i.) It ftands about the middle of Lower Galilee, between Nazareth and the co\mtry of Gennefareth. According to Jofephus, it is 30 furlongs in height, and 26 in compafs. It is an infulatcd mountain, fituated on a plain (that of Ef- draelon), and having a level area at the fummit, very fer- tile and pleafaiit. According to Maundrell, this area is of an oval figure, extending in breadth about a furlong, and two furlongs in length, .lofcphus fays, that he caufcd it to be furrounded by walls, within the fpace of 40 days, that he might thus, without doubt, render it more inaccef- fible to the Romans. An ancient tradition informs us, that Jcfus was tranf- figured upon mount Tabor (fee Matt. xvii. 2. Mark, ix. 2. Luke, ix. 28.), and that this is the place which is called by St. Peter the " holy mount." (2 Pet. i. 18.) Some learned authors, however, are of opinion, that the tranf- figuration happened upon a mountain near Ctefarea Philippi, i ,'. upon mount Paiiium, which is very high, according to Jofephus. We find the city called Tabor, mentioned I Chron. vi. 77 ; but it is not well known, how it was fituated with relation to the mount. Tabor, Tabour, Tabret, or Tabour'm, a fmall drum; (which fee.) It is an accompaniment to a fmall pipe or fife ; inftniments very animating in a country dance. TABO RITES, or Thaborites, in Ecclejiajlkal H'lf- tory, a branch or feft of the ancient Huffites. The Huflltes, towards the beginning of the 15th cen- tury, dividing into feveral parties, and about the year 1420, into two great faftions ; one of them retired to a httle mountain or rock, fituate in Bohemia, 15 leagues from Prague, and there put themfelves under the conduft of Ziflta ; building themfelves a fort or caftle, and a regular city, which they called Tabor or Thabor, either from the general word thabor, which in the Sclavonic language figni- fies cajlk ; or from the mountain Tabor, mentioned in Scrip- ture ; and hence they became denominated Thaborites. Thofe of the other party were denominated Cnlixt'ins. The Taborites not only infifted upon reducing the reh- gion of Jefus to its primitive firaphcity, but required alfo that the fyftem of ecclefialHcal government fliould be re- formed in the fame manner, the authority of the pope de- ftroyed, and the form of divine worfhip changed : they demanded the ereftion of a new church and hierarchy, in which Chrift alone (hould reign, and all things fhould be carried on by a divine dircftion and impulfe. In maintain- ing thefe demajids, fome of their leaders went fo far as to flatter themfelves with the chimerical notion, that Chrift woidd defcend in perfon upon earth, armed with fire and fword, to extirpate herefy, and purify the church from its numerous corruptions. This enthufialtic elafs of Huffites alone, Mofheim fays, we are to look upon as accountable for all thofe afts of violence, which are too indiicriminately laid to the charge of tlie Huffites in general, and to their two leaders, Zifka and Procopius, in particular. After the time of the council of Bafil, in 1433, which endeavoured, though without fuccefs, to reconcile the Taborites with the Roman pontiff, they began to review their religious tenets, and their ecclefiaftical difcipline, with a defign to 9 TAB render them more perfeiS. This review, conduced with great prudence and impartiality, gave a rational afpeft to the religion of this feft, who withdrew themfelves from the war with Sigifmund, in which they were engaged, abandoned the doArincs, which, upon ferious examination, they foimd to be inconfiftent with the genius and fpirit of the Gofpel, and banifhed from their communion all thofe whofe dif- ordered brains or licentious manners might expofe them to reproach. The Taborites, thus new-modelled, were the fame with thofe Bohemian brethren (or Picards, /. e. Beg- hards, as their adverfaries called them) who joined Luther and his fucceffors at the Reformation, and of whom there are at this day many of the defcendants and followers in Poland and other countries. Mofh. Eccl. Hift. vol. iii. TABORNOST, in Geography, a town of Africa, in the country of Darah ; 120 miles S.E. of Morocco. TABORO, a mountain of Naples, in Principato Citra, on the confines of Lavora. TABOROWKA, a town of Poland, in the palatinate of Kiev ; 1 6 miles W.N. W. of Bialacerkiev. TABOTUVO, a town of Africa, oa the Ivory Coaft ; 45 miles S.W. of Druin. TABOU, a town of Africa, on the Ivory Coall ; 36 miles S.W. of Druin. TABOURET, Privilege of the, in France, is a privilege fome great ladies enjoy, to lit, or have a ftool, in the queen's prefence. TABRE, in Geography, a town of Hindoollan, in the Carnatic ; 15 miles E. of Volconda. TABREEZ, or Tauris, a city of Perfia, the capital of the province of Adirbeitzan, or Azerbijan. Sir William Jones, and other learned perfons, are of opinion, that this city was the ancient Ecbatana. M. D'Anville, adjudging that honour to Hamadan, conceives Tauris to be Gaza, or Gunzaca, where Cyrus depofited the treafures of Croefus, and which was afterwards taken by Heraclius. According to the Perfians, Zobcida, the celebrated wife of Haroun-ul- Rafhid, was its founder ; but on their authority we can place little reliance. It is certain, however, that Tauris was a favourite refidence of Haroun-ul-Rafhid ; and though he had not the honour of founding this city, it is probable that he improved and cmbeUiftied it in a confiderable degree. In the days of Chardin, it was one of the largeft and moll populous cities in the Eaft, and, according to that traveller, contained half a milHon of inhabitants. But no town has fuffercd more from the ravages of W'ar. Situated towards the frontiers of contending empires, it has alternately been oc- cupied by Turks, Tartars, and Perfians, and has been cap- tured and facked eight different times ; but its ruin has been chiefly owing to the number of earthquakes which have, at different times, levelled its proudell edifices with the duft. Tabreez does not now contain more than 30,000 inha- bitants, and is one of the moil wretched cities in Perfia. It is feated on an immenfe plain at the foot of a mountain, on the banks of a fmall river, the waters of which are confumed in the cultivation. This river, called Agi, proceeds from the mountains at Buftum, and enters the plain of Tabreez three miles N. of that city. This city is furrounded with a decayed wall, and the only decent houfe in the place is a new barrack, erefted by the prince for the accommodation of his troops. The ruins of the ancient city are very ex- tenfivc and very mean, being nothing but a confufed mafs of old mud walls. Tabreez is fituated in N. lat. 38"^ 10'. E. long. 46° 37'. Kinneir's Mem. of the Perfian Empire. TABUDA, in Ancient Geography, a river of Belgic Gaul, in the country of the Morini, near Gefforiacum Navale. Ptol. TABUE', TAG TABUE', in Geography, a town of Egypt, on the NUe ; 9 miles S.W. of Menuf. TABUIL, a town of South America, in the province of Tucuman ; 20 miles E. of St. Fernando. TABULAR Spar, in Mineralogy, Spathon tables, Haiiy ; a fpecies of lime-ilone, generally of a greyifh-white colour, but fometimes inclining to greenifh-yellow or reddifh-white. It occurs maflive and cryftallized in reftangnlar four-fided tables. The luftre of the principal frafture is (hining and pearly ; the ftrufture is imperfectly lamellar. Tabular fpar occurs in large diftinft prifmatic concretions, which are promifcuoufly aggregated : it is tranflucent, and phofpho- refces when fcratched with a knife : its fpecific gravity is 2.86. It is fometimes friable. When put into nitrous acid it effervefces, and then falls into grains. It is infufible by the blowpipe. The analyfis, as given by Klaproth, is Silex Lime Water 50 45 S This mineral is of rare occurrence ; its locality, as given by Stiitz, is at Dognafl fs- '7') Tard tackles are compofed of double and fingle blocks ; the double blocks are fpHced into the lower ends of the pendants /, and the fingle blocks are flrapped, with hooks and thimbles : they are ufed to hoifl the boats in or out. Tackle-Fa//, that end of the rope of a tackle which is bowfed on, or the rope which compofes the tackle. Tackle, Gunner's, that which ferves to hale the ordnance in or out. Tackle Pendants. See Pendant. Tackle, TAG Tackle, Taek, is a fmall tackle ufed occafionally to pull down the tack of the principal fails of a fhip to their refpcc- tive ftations. There is alfo a tackle of this kind conftantly fixed to the tacks of the main-fail in brigs, floops, and fchooners, for the fame purpofe. Falconer. TACKRAMAH, in Geography, a town of Africa, on the Gold Coaft. N. lat. 4° 52'. W. long. 3° lo'. TACKSMAN, in Agriculture, the tenant or perfon who holds or takes a tack of land of another. In fubfetting, the original perfon of this kind is, it is faid, by the writer of the Peebles Correfted Agricultural Report, confidered as bound to the proprietor, as well as the fub-tenant ; whilft, in alTignment, the original tenant is free, fubftituting the other in his place. In conformity to the analogy of the feudal law, tlierefore, it is faid, as well as to tlie greater fecurity of the proprietor, the Scottifh law is confidered as more favourable to fubfet, than to afTignatiou ; becaufc, jn fubfet, the firft tenant does not relinquifli his pofition as a qujji valTal, and the purpofes of the metaphorical dc- liBus may be, thus, confidered as metaphorically, or ana- logically fulfilled by thj^fia'w juris, or quaft: moreover, too, the fecurity of the proprietor, fo far from being weakened, is greatly ftrengthened, in having his right of hypothec un- impaired, and the fecurity of two inftead of one. Upon this principle, it was confidered, it is faid, by the Scottifli law oracle, Erfkine, that a power of fubfet was implied, in all cafes where the contrary was not direftly cxprefled ; until the decifion, in 1791, came to reftify the mifconceptions of the people, when it was decided, that, in a tack of nineteen years, it was implied, in law conftruftion, without any formal ilipulation in the leafe to that efFeft, that the power of de- leSus was retained ; and that the tack was neither aflignable nor fubfetable. But even Erflcine allows, it is faid, that, upon legal prin- ■ciples, an exprefs Ilipulation in the tack againft. afliguees, both legal and voluntary, would prevent the tack from being cvifted by the tenant's creditors : otherwife a tack, unaf- fignable by the tenant's voluntary deed, would, according to iim, be eviftable by adjudication, at the iiiftance of the tenant's creditors ; but even in that cafe, the creditors would Tse guilty of lefe-majejle towards the facred riglit of the de- hflus, were they to bring the reverfion of the leafe to a fair fale to the bell bidder : they are debarred, therefore, it is laid, from fuch unhallowed and irreverend meafures ; they can only enter upon adminiftration, as refponfible faftors of the tenant's concerns. TACKUMBREET, in Geography, a town of Africa, ■or, as it may be rather denominated, the ruins of an ancient town called " Siga," or " Sigeum," once the metropolis of Mauritania, fituated on the coaft of the Mediterranean, at the mouth of the river Tafna ; 44 miles S.W. of Oran. N. lat. 35° 30'. W. long. 0° 55'. TACKYSERAI, a town of Hindooftan, in Oude ; 35 sniles W. of Lucknow. TACLAOUR, a town of Thibet. N. lat. 38° 5'. E. long. 80° 51'. TACOLA Imperium, in yJndent Geography, a port on the weftern coaft of India, on this fide of the Ganges : and now Junhjeylon. TACOMA, in Geography, a town of Mexico ; 16 miles N. of Mexico. TACOMA R-Tree, a name by which fome authors call the fugar-cane. TACON Mountain, in Geography, a mouHt;iin of Ame- rica, in Maflachufetts, S. of Great Barringlon. TA-CONG-TO-CHE, a town of the illgnd of For- mofa. N. lat. 22° zz'. E. long. 120° 4'. Vot, XXXV, T A C TA-COO, a town of China, in the province of Pe-tche-li, within the mouth of the Pei-ho, or White river, and the fiHl place of any note in the N.E. frontier of the country. The grand cmbalTy to China arrived at this town in Auguft 1795, and found here a confiderable number of yachts, or large covered bai-ges and boats of burden, fit for paffing over the fliallows of the Pci-ho, (wliicli fee,) and dcUined to convey the whole of the cmbafty as far as the river led towards the capital of the empire. Many of thcfe veflcls were eighty feet long, and very capacious ; and yet they were fo con- ftrufted of light wood, as not to fink more than eighteen inches into the water, though they were lofty above it. The cabins were high and airy above : there were births for tlic crew, and beneath the floors were lockers for fccuring the neccffaries. The yacht appropriated to the ambaflador had an apartment, confifting of an anti-chamber, a faloon, a bed- chamber and a clofet ; and its windows were adorned with a great number of glafs-pancs ; whereas the frames of the windows of the other yachts were generally filled with a kind of paper, manufaftured chiefly in Corea, having in its com- pofition an unftuous fubftance, which rendered the paper more durable when expofed to the weather, as it was much lefs affefted by the rain or any kind of moifture, than that which is made in Europe. During the ambaffador's ftay before Ta-coo, he was vifited by the viceroy of the province, •who, by order of the emperor, came from Pao-ting-foo, his ufual place of refidence, at the diftance of a hundred miles ; and who took up iiis abode at the principal temple of Ta- coo, confccrated to the god of the fea, to whom invocations were frequently addreflijd under the appellation of " Toong- hai-vaung," or king of the Eaftern fea. Of this idol there were feveral figures in different brilliant edifices of porcelain, within one inclofure. Sir George Staunton, in his account of this embaffy, has given an engraved reprefentation of tliis Chincfe Neptune, bearing in one hand a magnet, whilft he is fitting on the waves, with firmnefs, eafe, and dignity, and thus confcious of his own fecurity ; and in tlie other, a dol- phin, denoting his power over the inhabitants of the ocean. His beard flowed in all direftions, and his agitated lock* feemed to be intended for a perfonification of the troubled clement. At a fmall diftance from the " Hai-chin-miao," or temple of the fea-god, is the hall of audience of Ta-coo, fituated in the midft of a fpacious court. TACOTALPA, a town of Mexico, in the province of Guaxaca, on the river Alvarado ; 6 miles S.E. qf Alvarado. — Alfo, a town of Mexico, in the province of Tabafco ; 30 miles S.W. of Villa Hermofa. TA-COU, a river of Cliina, whicli runs into the fea, 7 miles E.N.E. of Kiao. TACOUR, a town of Hindooftan, in Myfore ; 10 mile« S. of Bangalore. TAC-POU-CHAI, a town of Thibet ; 250 mile*, S.E, of Lan"a. TAC-POU-NAI, a town of Thibet ; 240 miles S.E. of Lafla. TAC-POUY CouRou^vAMKiN, a town of Thibet ; 145 miles S.E. of Laifa. Tac-polv Lafoi, a town of Thibet ; 120 miles S. S.E- of Lafl^a. TACPOY, a town of Thibet, and capital of a diflj-icl ; 126 miles S.E. of Laflii. N. lat. 27^ 53'. E. long. TACQUET, Andrew, in Biography, a mathematician, was born at Antwerp in 161 1, and having entered into llie order of Jefuits in 1629, was a teacher of the languages and mathematics for feveral years. He died in 1660. 1 acquct was the author of feveral mathematical works, among E wliiofi T A C which we may enumerate the following : viz. " Cylindri- corum ct Annularium, Libri V. Elemcnta brevi hiftonca Nairatione dc Ortu ct ProffrcfTu Mathcfeos," &c. printed at Venice in 1737, with Whillon's additions; " Arithmetics: Thcoria et Praxis ;" " Thcorcmata fclcfta ex Arehimede." After his death, fevernl of liis treatifes were publilhed under the title of " Andrex Tacqucti Antvcrpienfis Opera Mathe- matica," containing" Aftronomix Lib. VIII.," " Gcome- trix PradicK, Lib. III.," " Architeaurx Mllitaris, Lib. I. :" diftinguifhed by their perfpicuity. Montucla. Gen. Biog. TACSAI Raki, in Gw^rfl/>/jiy, a lake of Thibet, about 36 miles in circumference. N. lat. 32°. E. long. 88° 34'. TACSANLU, a town of Afiatic Turkey, in Natolia ; 23 miles N.N.W. of Kiutajah. TACSONIA, in Botany, JulT. 398, a name of Peruvian origin, given by that author to fuch fpecies of Paffion- flower, as have a tubular elongation of the bafe of their calyx. See Passiflora. TACTICS, TKXTiK«, formed from rafu-, order ; the art of difpofing forces in form of battle, and of performing the military or naval motions and evolutions. The fcience of taftics is either niUitary or naval. Tactics, Military, comprehcml great or general taiElics, lagrande tadique of the French writers, which includes every thing that relates to the order, difpofition, and formation of armies, their encampment, and every other circumftance per- taining to ftores, baggage, &c. ; and alfo particulai- or fubordinate taftics, more immediately comprifing their movements and evolutions. With the former every general officer ought to be thorouglily acquainted ; whilft the latter tlie talTeias nous ot L,yons. JLivJiring, J ■'^ - Taffetas noir lujlre of the French, is our alamode. Non lujlre is our lujlrhig. There are tafFeties of all colours ; fome plain, others ftriped with gold, filver, filk, &c. others checquered, others flowered, others in the Chlnefe point, others the Hungarian ; with various others to which the mode, or the caprice of the workmen, gives fuch whimfical names, that it would be as difficult, as it is ufelefs, to rehearfe them : befides, that they fcldom hold beyond the year in which they firft rofe. The old names of tafFeties, and which ftill fubfifl, are, tafFeties of Lyons, of Spain, of England, of Florence, of Avignon, &c. The chief confumption of tafFeties is in the fummer- dreffes for women, in gowns, linings, window-curtains, &c. There are three things which contribute chiefly to the perfeftion of tafFeties, t/'z. the filk, the water, and the fire. Thefilkis not only to be of the finefl kind, but it mufl be work- ed a long time, and very much before it be ufed : the watering is only to be given very lightly, and feems only intended to give that fine luflre, by a peculiar property not found in all water : laftly, the fire, which is paflTcd under it to dry the water, has its particular manner of application, on which the perfeftion of the fluff depends very much. Oftavio May, of Lyons, is held the firil founder of the manufadlure of glofTy taflcties ; and tradition tells us the occafion of it. Oftavio, it feems, going backwards in the world, and not able to retrieve himfelf by the manufacture of tafFeties, fuch as were then made, was one day mufing on his misfortunes, and, in mufing, chanced to chew a few hairs of filk which he had in his mouth : his reverie being over, the filk he fpit out feemed to fhine, and, on that ac- count, engaged his attention. He was foon led to refleft on the reafon ; and, after a good deal of thought, concluded. that the hiflrc of that filk mufl come, i. From his having prcflcd it between his teeth. 2. From his having wetted it with his faliva, which had fomething glutinous in it. And, 3. From its having been heated by the natural warmth of his mouth. All this he executed upon the next taftcties he made, and immediately acquired in.mcnfe ritlns to himfelf, and to the city of Lyons the reputation it ftill maintains, of giving the glofs to tafFeties better than any other city in the world. It will not, we conceive, be lefs ufeful than curious, to infert here the defcription of the engine contrived by Oc- tavio to give the glofs to taft'ety ; and to add the manner of applying it, and the compofitioii of the water ufed in it. The machine is much like a filk-loom, except that, in- ftcad of iron points, here is ufed a kind of^ crooked needles, to prevent the taflety from flipping : at the two extremities are two beams, on one of which is rolled the tafFety to take the glofs ; and on the other, the fame taft'ety, as faft as it has received it. The firft beam is kept firm by a weight of about two hundred pounds, and the other turned by means of a little lever pafFmg through mortifcs at each end. The more the tafFety is ftretched, the greater luflre it takes : care, however, is to be ufed that it be not weakened by over-ftretching. Befides this inftrument for keeping the ftuff ftretched, there is another to give it the fire : this is a kind of carriage, in form of a long fquare, and of the breadth of the tafFeties : it moves on trundles, and carries a charcoal fire under the tafFety, at the dillance of about half a foot. Thefe two machines prepared, and the tafFety mounted, the luflre is given it by rubbing it gently with a ball, or a handful of lifts of fine cloth, as it rolls from one beam to the other ; the fire, at the fame time, being carried under- neath it to dry it. As foon as the piece has its luftre, it is put on new beams to be ftretched a day or two ; and the oftener this laft prep.vation is repeated, the more it increafes the glofs. For black taffeties, the glofs is given with double beer and orange or lemon-juice ; liut this laft is the leaft proper, as being apt to whiten them. The proportion of the two liquors is, a gallon of orange -juice to a pint of beer, to be boiled together to the confiftence of a rich broth. For coloured taffeties, they ufe gourd-water diftilled in an alembic. There are alfo feveral different forts of tafFeties manufac- tured in China ; as corded tafFeties, which wear well ; and alfo fome with flowers, and others beautifully ftriped ; and a particular taflety, of which they make drawers, and other kinds of wearing apparel. This laft is thick, and yet fo pliant, that it may be folded and prefled with the har.d, with- out leaving any mark in it. They alfo wafh it, like other ftufFs, without its lofing much of its luftre. The Chinefe workmen give the luflre to this taftety with the fat of the river-porpoife, which they purify by waflu'ng and boiling ; and then with a fine brufli, they give the taft'ety two beds in the fimie direction, on the fide which they intend to render gloft'y. TAFFI, Andkea, in Biography, was one of thofe early matters to whom the revival of the arts in Italy is attributed. His fhare lay in the praftice of mofaic painting, which he learned of a Greek monk, named Apollonius, who had been called to 'Venice to work in the great church of St. Marco ; and who afterwards accompanied Taffi to Florence. Andrea was born at Florence in the year 1213, and died there at the age of 8 1 . TAFILET, or Tafilelt, in Geography, a diftrift, for- merly a kingdom of Africa, in the empire of Morocco, and country T A F cauiitry of Bilcdulgerid, cxtonding along the caft fide of mount Alias ; the habitations of which arc about 1500 fcat- tcred houfes, and of thefe fcvoral are defended by a tower, and each of them (lands amidll an inclofure of gardens, cul- tivated grounds, and plantations of palm-trees, forming a variegated and pleafant country, interfered by many rivers and nvulcts, defcending from the call of mount Atlas, and ferving to water their lands. Tafilelt, as well as Draha, produces a fupcrior breed of goats, and a great abundance of dates, which are fmall, but good, conftituting the wealth of the country, and fupplying food for the people, and even for the cattle. Although the Koran prohibits the life of fpirituous liquors, yet by ancient cuftom, brandy is made at Tafilelt of dates, which is very llrong, and drank fo immoderately by the (herifs, that wine produces no effeft npon them. Moil of thefe flicrifs are poor, and employ themfelves in their grounds and gardens, and very frequently pillage one another. The countries fituated near the banks of the rivers of Draha and Tafilelt have feveral plantations of Indian corn, rice, and indigo. Tlie town of Tafilelt, after which the kingdom was named under the (herifs of the reigning houfe, is not an ancient city. It derives its name from the word" Fileli," which denominates the inhabitants of the countr)-, and alfo the fluffs and carpets which are here manufaftured. The foil of the extenfive plain on which it is fituated is a whitifh clay, which when moiilened refem- bles foap ; and though it pafTes a river that rifes in the At- las, and purfues a courfe from tlie S.W. to tlie N.E., being at Tafilelt about as wide as the Thames at Putney, its water, traverfing the faline plains, is brackilh : after a courfe of about 4J0 miles, it is abforbed m the defert of Angad. It has feveral caftles of tarrace on its banks, inhabited by the fherifs or princes of the reigning family of Morocco. Wheat and barley have been lately cultivated near the river and the caftles. Another river of inferior note rifes in the plains N. of Tafilelt, and flowing in a foutherly direftion, is abforbed in the Great Defert or Sahara. The water of this nver is alfo brackiih, and unfit for culinary purpofes. The inhabitants of this country, it is faid, poffefs fuch a fenfe of honour, that a robbery is fcarcely known among them, though they ufe no locks. Commercial tranfaftions are carried on amongft them by barter or exchange, fo that they have little fpecie ; but in aU tranfaftions of magnitude, gold-dufl is the circulating medium. They live in the fimple patriarchal manner of the Arabs, differing from them only in having walled habitations, which are invariably near the river. The climate during a great part of the year is in- tenfely hot, and the fhume, or hot wind from Sahara, blow- ing tempefluoufly in July, Augufl, and September, and carrying with it particles of earth and fand, is very perni- cious to the eyes of the inhabitants. A confiderable trade is carried on from Tafilelt to Tombuftoo, HoufTa, and Jinnic, S. of Sahara, and alfo to Morocco, Fez, Sufe, Al- giers, Tunis, and Tripoli. Indigo abounds, but by reafon of the indolence of the cultivators, it is of inferior quality. Here are alfo mines of antimony and lead-ore. The common drefs confifts of a loofe (hirt of blue cotton, with a Ihawl or belt round the waift. A caravan paffes annually from hence to Tombudloo. Woollen haiks, of a curious texture, being light and fine, are manufaftured here. The Tafilelt goats are very prolific, and afford a rich milk in great abundance : and therefore they conflitute an article of confi- derable export. The Tafilelt leather is very foft and fine, and much fuperior to that of Morocco : it is as foft and pliable as filk, and impervious to water. The tanners uie the leaves of a (hrub called t^zra, which grows in the Atlas moun- tains, to which forae have afcribed the peculiar quality of TAG the leather ; though others afcribe it to fome quality in the air and water. The population of the dillricl of Tafilelt is dated by Mr. Jackfon at 650,000. The town is 140 miles E.S.E. of Morocco. N. lat. 31° 20'. W. long. 6". TAFNA, a river of Algiers, which runs into the Me- diterranean, near Tackumbreet. TAFO, or Tafa, a town of Africa, on the Gold Coaft. TAG, or Tagge, in Rural Economy, See Teg. Tag, or Tag-Sore, a difeafe in fheep, which confifts, as ftated in a paper in the third volume of the " Tranfaftions of the Highland Society of Scotland," of fcabs and fores fituated on the under fide of the tail ; arifing, in warm wea- ther, from its being fouled with purging and other dif- charges. The matter hardens there, irritates the tender vefTels, and produces fores, which, if not attended to, run into mortification, and prove fatal, as in the legs. See Swelling or L,eg-E-vil. It is (hewn by the (heep turning frequently round to bite the tail. As this complaint arifes principally from purging, and the naflinefs caufed by it, &c. the firfl thing to be done is the reilraining and ciu^e of this evacuation : after which the tail of the animal is to be chpped, and the fore part laid bare, wafhed carefully with milk and water, blood-warm, and then with lime-water. The fheep is then to be turned out into a dry pafture, and looked at again in two or three days, and if not then well, the wafliing mufl be repeated, and the parts anointed with greafe and tar mixed together in equal proportions. TAGABONA, in Geography, a river of Weft Florida, which runs into the St. Mark, N. lat. 30° 22'. W. long. 84° 34'- TAGADEMPT, Tagadeont, or Tigedent, a town of Algiers, anciently called I^aga ; 60 miles E.S.E. of Oran. TAGiE, in Ancient Geography, a town of Afia, in Par- thia, near the river Oxus, and on the confines of Hyr- cania. TAGAI, in Geography, a town of Ruflia, in the go- vernment of Simbirflc ; 48 miles W. of Simbirfk. N. lat. 54° 20'. E. long. 47°. TAGAL, a town of the ifland of Java, on the N. coaft, the refidence of a Dutch agent for the purchafe of rice ; 35 miles E. of Cheribon. TAGALA, Ta-Gala, or Gala language, is among th# PhiUppines what the Malayu is in the Malay iflands, or the Hindoftani in Hindooftan Proper. It poffefTes the com- bined advantages of the four principal languages in the world : it is myfterious as the Hebrew ; it has articles for nouns, both appellative and proper, like the Greek ; it is elegant and copious as the Latin ; and equal to the Italian, as the language of compliment or bufinefs. This language has been cultivated only by the Spanifh miffionaries. The Tagala grammar of Fra. Gafpar de San Auguflin, was printed in 1 703, and again in 1787. The alphabet confifts of feventeeu letters, three of which are vowels, and four- teen confonants. The Tagala charafters are faid to have been derived from the Malays, and they are read with as much difficulty as the eafe w-ith which they are written. This Tagala is written with an iron ftyle on bamboos and palm- leaves, and the Spanifh miffionaries affert, that the ancient mode of writing was from top to bottom, like the Chinefe. This language, with a confiderable number of peculiar vo- cables, and great fingularity of idiom, is ueverthelefs to be confidered as a cognate language with Malayu, Bujis, and Javanefe. Few languages, on a curfory examination, pre- fent a greater appearance of originality than the Tagala. For TAG For a farther account of it, we refer to Dr. Leyden's EfTay on the " Languages and Literature of the Indo-Chinefe Nations," in the Afiatic Refearches, vol. x. TAGALAZ, in Geography, one of the Fox iflands, in the North Facitic ocean. N. lat. 53° 30'. E. long. 185° 26'. TAGAMA, in /Iticknt Geography, a town of Africa, in the interior of Libya, upon the bank of the Niger. Ptol. Tagama, in Geography, a country of Africa, in Nigri- tia. W. of Caftina. TAGANROG, a fort of Ruffia, on the f^-a of Azoph, firil built by Peter the Great in 1696; 32 miles W.N.W. of Azof. Taganrog is fituated upon the cliff of a very lofty pro- montory, commanding an extenfive profpe£l of the fea of Azof, and the whole European coaft to the mouths of the Don. The number of inhabitants does not at pre- fent exceed 5000. The mole in the haven is fo (hallow, that fhips performing quarantine lie off at the diflance of 10 miles, and all vefFels drawing from 9 to 10 feet of vi^ater cannot approach nearer to the town tlian this diflance. This town has funk into decay ; and all the beft houfes are in its fuburbs. If it had water, its fituation is very favourable for commerce ; but it can be carried on here only for three months in the year. In the winter the fea is frozen. Here are three fairs in the year. The iifh caught in great abund- ance in the fea of Azof is dried and fent over all the fouth of Ruffia. Fruit is brought from Turkey, fuch as figs, raifins, and oranges ; Greek wine from the Archipelago, with incenfe, coffee, filk, fliawls, tobacco, and precious ftones. Copper of a very inferior quahty comes from Tre- bifond, and is forwarded to Mofcow. Among the principal exports are caviare, butter, leather, tallow, corn, fur, can- vas, rigging, lines, wool, hemp, and iron. The greatefl advantage this town enjoys is its being the depofitor^' of Si- berian produftions. The Cahnucks form large fettlemcnts in the vicinity of Taganrog. It is the refort of people from a great variety of countries ; infomuch that the inha- bitants of fifteen different countries have been obferved in this place at the fame time. TAGAPOLA, a fmall ifland among the Phihppines ; 25 miles W. of the ifland of Samar. TAGARA, an ancient city of India, known to the Greeks about 2050 years ago. Arrian, in his Periplus Maris Erythraei, fays that it was a large city, and all kinds of mercantile goods throughout the Deccan were brought "hither, and hence convyed in carts to Baroach, or Bary- gaza. Arrian alfo informs us that Tagara was fituated at about 10 days' journey E. of another famous mart, called Plithana, or Pluthana ; that Pluthana was 20 days' journey S. of Baroach ; and that the road to it was through the Bala-gaut mountains. Pluthana, now called Pultanah, is fituated on the fouthern bank of the Godavery, about 217 Britifh miles to the fouthward of Baroach. If we divide thefe 217 miles by 20, the number of days travellers fpent in palling from between Pultanah and Baroach, according to Arrian, we fnall have nearly 11 miles ^fr day, or y cofs, xvhich is the ufual rate of travelling with heavy loaded carts. Arrian informs us, that Tagara was about 10 days' journey W. of Pultanah. Allowing thefe lodays to be equal to about 100 Britifh miles, Tagara, by its bearing and diflance from Pultanah, falls at Deoghire, or Deogire (which fee), a place of great antiquity, and famous through all India, on account of the pagodas of Eloura. It is now called Dow- latabad, and about four cofs N.W. of Aurungabad. It ap- pears in Arrian's Periplus, that on the arrival of the Greeks 3 TAG into the Dfccan, above 2000 years ago, Tagara was the metropolis of a large dillrift called Ariaca, which ctimpre- hended the great-fl part of fubah Aurungabad, and the fouthern part of Concan. About the middle of the firft ccn- tury, Tagara was no longer the capital of Ariaca, rajah Salbahan having removed the feat of the empire to Pattan. However, the rajahs, headed by Salbahan, having revolted, they gave him battle, and he was flain. Tagara became again the metropolis of Ariaca ; at leafl this was the cafe towards the latter end of the eleventh century. When the MulTulmans carried their arms into the Deccan, about the year 1293, Tagara or Deoghir was flill the refidence of a powerful rajah, and remained fo till the time of Shah-Jehan, when the diftrift belonging to it became a fubah of the Mogul empire. Thus Tagara was deferted, and Kerkhi, four cofs S.E. of it, became the capital, now called Aurun- gabad. Thus the ancient kingdom or rajahfhip of Tagara was deftroyed, after it had exillcd, with little inten-uption, above 2000 years. Afiatic Refearches, vol. i. TAGASA, a town of Fez, fcated on a river about three leagues from tlie Mediterranean ; 20 miles W. of Melilla. TAGASTA, in Ancteitt Geography, a town of Africa, in Numidia, on the route from Hippone to Cjefarea. An- ton. Itin. TAG A VAST, in Geography. See Tagoast. TAGAZEE, a town of Africa, on the road from Mourzouk to Agades ; 260 miles S. of Mourzouk. N. lat. 23° 32'. E. long. 12° 55'. TAGAZOUTE, a town of Algiers ; 45 miles S.E. of Oran. TAGEBACHI, an ifland in the Red fea. N. lat. 25° 2'. TAGETES, in Botany, a name which Fuchfius tells us is appKed by Apuleius to the Tanfy, but which he himfelf adopts for a plant, not very diffimilar in fohage, now vul- garly called the French, or African, Marygold. He is followed by Dillenius, Linnaeus, and every fubfequcnt writer. De Theis derives the word from Tages, an Etruf- can deity, grandion of Jupiter, and teacher of divination ; and fuppofes the beauty of its flowers may have procured the plant this mythological appellation. Of this intention we can find no traces in the above writers. — Linn, Gen. 430. Schreb. 561. Willd. Sp. PI. v. 3. 2126. Mart. Mill. Dia. V. 4. Ait. Hort. Kew. v. j. 88. Tourn. t. 278. Juir. 182. Lainarck lUuilr. t. 684. Gsertn. t. 172 Clafs and order, Syngenejia Polygam'ta-fuperJJua. Nat. Ord. Compofittc oppojittfolite, Linn. Corymbifern:, JufT. Gen. Ch. Common calyx perfeftly fimple, of one leaf, tubular, oblong, with about five teeth, and as many longitu- dinal angles. Cor. compound, radiant. Florets of the ele- vated diflc numerous, all perfedl, tubular, longer than the calyx, ereft, cut half way down into five hncar fegments, villous at the infide : thofc of the radius five, ligulate, fe- male, longer than thofe of the dilk, tlieir limb almofl as broad as long, very obtufe, contratted and downy towards the tube, permanent. Stam. in the perfeft florets. Filaments five, capillary, veiy fhort ; ar.lhers united into a cylindrical tube. P'ifl. in the perfeft florets, Gtrmen oblong ; flyle thread-fhaped, the length of the ftamens ; fligma divided, flender, reflexed. Perk, none, the calyx remaining un- changed. Seeds, to both kinds of florets, folilary, linear, compreffed, rather fhorter than the calyx ; crowued with five, more or lets, ereft, pointed, unequal fcales. Recept. naked, fmall, flat. Obf. In a cultivated (late, tlie two common garden fpe- cies have ufually, from luxuriance, more fegments in the calyx. TAGETES. csUt, and more florets in the radius, than is natvjral ; one of thefc luxuriant flowers is what Girtner lias delineated. Some more recently difcovered fpccios, on the other hand, have naturally but three or four radiant florets. EfT. Ch. Receptacle naked. Secd-tiown of feveral ercft pointed fcales. Calyx fimple, of one leaf, tubular, with five tecdi. Florets of the radius five, permanent. 1. T.patula. French Marj'gold. Linn. Sp. PI. 1249. Willd. n. 2. Ait. n. 2. Loureir Cochinch. 504. Curt. Mag. t. 1 50. ( Flos aphricanus minor, limplici flore ; Gcr. Em. 750. Caryophyllus indicus minor ; Camer. Epit 407.) I3. T. minor, flore fulvo maculato ; Dill. Elth. 373. t. 270. — Stem fpreading. Leaves pinnate ; leaflets lanceo- late, with hair-pointed ferraturcs. Stalks fingle-flowered, fomewhat fweUing upwards. — Native of Mexico, from whence it was brought to the gardens of Europe, about the middle of the fixteenth century, and hence difperfed over otiier countries, being now, according to Loureiro, com- monly cultivated in Cochinchina, China, and various parts of India. With us it is a tender annual, ralfedon a hot -bed in fpring ; and being planted out after midfummer, decorates almoft every garden throughout the autumn. Its appella- tions of French Marygold, and African Flower, are alto- gether founded in error. Thejlem is about a foot or 18 inches high, branched and widely fpreading. Leaves oppo- fite, of five or fix pair of dark green ([lining leaflets, with an odd one ; all gradually fmaller downwards. Floivers about two inches in diameter, yellow, with broad lateral ftripes, or fpots, to each radiant floret, of a peculiarly rich brown. They vary in fize and tints, as well as fcent, and are gene- rally more or lefs double. Theplant of Dillenius hardly de- ferves to be marked as a variety. The herb when bruifed is very fetid, acrid, and fuppofed to be poifonous, though too naufeous to be very dangerous. Few flowers are more linking in appearance. 2. T. ereha. African Marygold. Linn. Sp. PI. 1249. Willd. n. 3. Ait. n. 3. (Flos aphricanus major; Ger. Em. 749. Carj-ophyllus major indicus ; Befl. Eyftet. aefl:. ord.14. t.2. C. indicus ; Camer. Epit. 406. ) — Stem ereft. Leaves pinnate ; leaflets lanceolate, with hair-pointed fer- raturcs. Stalks fingle-flowered, fwelling upwards. — Native of Mexico ; introduced into the gardens of Europe about the fame time as the foregoing, nor is the epithet of African mpre correftly apphed to one than to the other. The fame mode of culture fuits both, and both are equally common. This fpecies is much the talleft,and grows ered. The leaves are rather paler. Floiuers twice as large, of a golden uni- form yellow ; fometimes orange-coloured. Columna, in his Ecphrafis, part 2. 47. t. 46, reprefents a quilled variety, as it is termed, whofe radiaiit_^o/-f/j are funnel-lhaped, and another vihok Jlorets arc all of that fort. 3. T. elongata. Long-ftalkcd American Marygold. Willd. n. 4 Stem ereft, nearly fimple. Leaves pinnate ; leaflets linear, ferrated at the end ; thofe of the lower leaves wedge-fliaped. Stalks fingle-flowered, elongated, flightly fwelling — Native of South America. Root annual. Stem from three inches to a fpan high, either fimple, or furniflied with a branch or two from the bottom. Leafets of the Jower leaves obovato-lanceolate, ferrated at the extremity ; thofe of the upper linear, with a few flightly hair-pointed ferraturcs at the end. StalL folitary at the top of the ftem or branch, and abnoll as long as the ftem itfelf. Flower deep yelkiw, agreeing in form and ftrufture with T. patula. 4. T. minuta. Small-flowered Chili Marygold. Linn. Sp. PI. 1250. Willd. n. 5. Ait. n. 4. (T. multiflora, plinuto flore albicante j DUl. Elth. 374. t. z8o.) Stem 6 ereA, denfely panicled. Lcitos pinnate ; leaflets lanceo- late, ferrated. Stalks many-flowered, fcaly — Native of Chili. Cultivated in Dr. Sherard's garden, before the year 1728. . A hardy annual, flowering in autumn, but feldom preferved in collcdions. Thcjlem is ten or twelve feet liigh, covered with leaves, which are fmaller than thofe of the firft fpecies. The floujers are very fmall and pale, forming denfe, compound, tufted, ereft panicles, at the ends of the branches ; th'jnjlall-s clothed with briftly fcales. Cr.Iyx cylindrical. Radius of two, three, or four varioufly lobed florets. This is furely the Chili plant of which Feuillc (quoted by Dille- nius) defcribestwo varieties, differing in the number of their radiant fiorets ; and which he fays is extremely hot in qua- lity. The Indians eat it to warm themfelves after their return from fifliing. 5. T. caracafana. Long-ftalked South American Mary- gold. Willd. n. 6. (T. peduncularis ; Cavan. Leccion 201. n. 494 ; ' Stem corymbofe, furrowed, ereft. Leave* pinnate ; leaflets lanceolate, ferrated at the end. Stalks elongated, fingle-flowered, ereft. Calyx cylindrical." — Gathered by Baron Humboldt at the Caiaccas. — Root an- nual. Stem corymbofe at the top. Leafets linear -lanceo- late, ferrated at the end, not fringed. Flozi-ers like thofe of the next fpecies, on long alternate ftalks. Leafets of the uppermoft leaves entire. Willdcnoiu. Tlie plant of Cava- nilles was raifed in the gai-den at Madrid, from feeds col- lefted at Cumana by Bonpland, the companion of the cele- brated Humboldt. Thejlem is defcribed a foot and a half high, furrowed, much branched. Floiuer-Jlalhs fix inches long, tumid near the calyx, leafy in their lower part. Corolla en- tirely yellow, with fix or eight rays fliorter than in the fol- lowing. We find nothing in his account which is not con.- • formable to the plant before us, and fhould have been glad if we could have adopted his greatly preferable fpecific name. 6. T. tenuifolia. Fine-leaved Peruvian Marygold. Cavan. Ic. v. 2. 54. t. 169. Willd. n. 7. Ait. n. 5 — Stem pani- cled. Leaves pinnate ; leaflets linear, ferrated ; their lower ferraturcs elongated. Stalks alternate, fingle-flowered. Ca- lyx club-fliaped Native of Peru. Cavanilles. We have fpecimens from Mutis. Mr. W. Malcolm is faid in Hort. Kew. to have cultivated this fpecies in 1797, but being a late-flowering annual, greatly inferior in fize and beauty to the popular fpecies of the fame genus, it has probably not been preferved. The appearance of the dried fpecimens is like a ftar\ed 7". patula, with more numerous, much fmaller, Jloiuers than ufual. The calyx abounds with oblong glan- dular dots, of which traces are likewife found in that fpecies. The corolla is defcribed of a full unfpotted yellow. 7. T. elliptica. Oval-leaved Peruvian Mar^'gold. — Stem ere£l, branched. Leaves pinnate ; leaflets elliptical, with fliallow ferratures. Stalks corymbofe, with lanceolate brac- teas. — Native of Peru. We received a dried fpecimen from the late abbe Cavanilles, in 1 804. The^^m has a flirubby appearance, and is much branched, leafy and furrowed. Leafets fcarcely vifibly ferrated, pointed, fmooth and even ; the lower ones of each leaf gradually fmaDer, and moftly al- ternate. Flowers rather numerous, not very much fmaller than in T. patula when not luxuriant ; their partial ftalks accompanied by alternate lanceolate braBeas. Calyx marked with fcattered, apparently glandular, lines. This is cer- tainly very diilindl from all the fpecies we can find de- fcribed. 8. T. mtcrantha. Small-flowered Mexican Marygold. Cavan. Ic. v. 4. 31. t. 352. Willd. n. 8 Stem much branched, fpreading. Leaves pinnate ; leaflets linear-awl- fhaped, entire. Stalks axillary, fingle-flowered. — ^Gathered by Lovis Tag Louis Nee, near the town of Queretaro, in New Spain, it flowered in the Madrid garden, in Oftober 1796. Root annual. S(ems hardly a foot high, round, rather woody, fmooth like every other part of the plant. The fiendernefs of the leaves, and fmallnefs of the Jlonuers, give this fpecies the appearance of a PECTisor Heteuospermum (fee thofe articles) ; but the calyx is perfectly fimple, tubular, with five furrows and five teeth. Florets of the radius two only, whitifli and undivided : thofe of the difli generally five, yellow, fcarcely more than four-cleft. Seeds long, coni- prefled, each crowned with two briftles, and two intermediate, notched, unequal fcales. 9. T. luc'ida. Sweet Chili Marygold. Cavan. Ic. v. 3. 3.3. t. 264. Willd. n. I. Ait. n. i. Curt. Mag. t. 740. Andr. Repof. t. 359. — Leaves fimple, finely ferrated. Panicle corymbofe. — Native of New Spain. Its feeds were brought to England in 1798, by the late marchionefs of Bute, along witli many otiier novelties from the gardens of Madrid. The root is perennial, and will endure our ordi- nary winters, with a flight degree of protection. Stan ereft, •about two feet high, round, ftriated, leafy, fmooth ; branched in the upper part. Leaves one and a half or two inches long, oppofite, on (hort, broad, comhhmd footjlalis, elliptic -oblong, fmooth, veiny, full of pellucid dots ; their lower ferratures tipped with briftly points, or hairs. Panicie level-topped, many-flowered ; its ilalks angular, fmooth, with linear-lan- ceolate braBeas. Calyx half an inch long, befprinklcd with glandular dots. Flo-uers of a golden yellow, agreeably fcented ; their radiant Jlorets generally three, very broad. Seed crowned with from two to five linear-lanceolate unequal fcales. The ferratures of the leaves are very incorreftly re- prefented in Cavanilles's plate, where they are made to re- lemble a fringe of fine hairs, which only belongs to the lower ones, and is not expreffed in any of the figures hitherto pub- iilhed. Tagetes, in Gardening, furnifhes plants of the herbaceous annual kind, among which the fpecies mofl;ly cultivated are, the French marygold (T. patula), and the African mary- gold (T. eretta). The firil fort has feveral varieties, as the pale yellow- flowered, deep yellow-flowered, golden yellow-flowered, crimfon-coloured, velvety, variegated crimfon and yellow, ilriped crimfon and yellow ; each of which has both fingle and double flowers : and there are the large-flowered, fmall- fiowered, fweet-fcented, and the dwarf French marygolds. In the fecond fort, alfo, there are varieties ; as thofe with pale yellow or brimftone -coloured flowers, with deep yellow flowers, with orange -coloured flowers ; the fweet-fcented :ind the dwarf, &c. ; each with fingle, double, and fiftulous flowers ; the middling African, with orange-coloured flowers, and tlie fweet-fcented African, and perhaps fome others. Method of Ctdture All thefe plants are increafed by feeds, which ihould be fown in the beginning of April upon a hot -bed ; and when the plants appear, they (hoidd have plenty of fre(h air, and, after they have attained fome growth, be tranfplanted on to another hot-bed, which is arched over by hoops, at the diftance of fix inches ; water- ing and Ihading them well till frefli-rooted, being afterwards gradually inured to the open air ; and about the beginning of May they may be taken up with balls of earth about their roots, and be planted in pots, to be fet out in the courts, yards, &c. about the houfe, fliading them till frefh rooted, and giving them water occafionally. But the firft fort divides and fpreads out widely near the ground, in a rambling manner, and requires to be trimmed up at bottom 10 a fins^L' fl:em, and its branches occafionally, to preferve the head fomewhat xegular, and within due bounds. Vol. XXXV. TAG In raifing them in the open ground, in cafe of the default of hot -beds and other conveniencies, the feed flioiJd not be fown before the beginning of April, when the plants are to be covered and protefted in the nights, and in fcvcrc weathtT ; and when otlierwife, not imtil the middle or latter end of it, and tlK^n in a warm rich fituation, either in drilU of half an inch in depth, or on the furface, and raked in lightly. After the plants are a few inches high, they Ihould be planted out cither finally into the borders and otiicr parts, or, when too fmall, into nurfery-rows for a little time, and then fet out where they are to remain. Two or three plants may be placed nearly together, m patches at five or ten feet diilance ; and when they (hew their flowers, fo as to judge of their properties, the worft. may be cleared away, and one only of the beft left to eacK patcli, &c. The fame way may be had recourfe to in- planting in pots, &c. In the future culture of all thefe kinds of plants, occa- fional waterings are neceilary, frequently the firil and fecond weeks after planting out, but more feldom afterwards. Thofe in pots (hould have it three times in the week con- ftantly, and morning and night in very hot weather. Stakes are requifite to the ilrong large-headed plants, one to each. They fliould alfo be properly trimmed in their fide-branches near the bottom, and the too great ramblers, to produce regularity. However, the fecond fpecies in particular, and the va- rieties of it, as they always grow firmly creft, both in ftem and branches, require but very httle trouble after their final planting out : they afford ornament and variety, among other plants, in the borders, clumps, and other parts of pleafure-grounds, as well as in pots for particular place* about the houfe, among other potted annual plants. The feeds of each fpecies, and their varieties, fliould be annually faved from the bell plants. All the forts grow very well and freely in any common garden foil, whicfi is in an open expofure, exhibiting a par- ticularly confpicuous autumnal bloom, in long fucceflion ; and when properly arranged, and difpofed in afiemblagc with other forts of plants, afford a highly ornamental •Briety and effeft, in the great diverfity of the various forms and colourings of the flowers, in the different forts and varieties. In faving the feed, it fliould be collefted only from the fineft and fullcft double flowers, when perfedly ripe, keep- ing that of the different varieties quite diftinft. The prime large heads of feed of each fort, after being well dried, may either have the feed beat nnd rubbed out, or kept in them, putting the whole up into bags, boxes, or drawers, until the period of putting them into the ground. Frefli feed fliould conft;antly be faved every year, as that of more than one year old will feldom grow well. TAGGAH, in Geography, a town of Africa, in the country of Algiers ; 24 miles S.E. of Seteef. TAGGIA, a town of the Ligurian republic; 4 miles N.E. of St. Remo. TAGGING. See She.ahing. TAGHAYOOG Bay, in Geography, a bay on the weft coaft of the ifland of Paraguay. N. lat. 25° 2'. TAGHMON, a poll -town of the county of Wexford, Ireland, on the road from New Rofs to Wexford, which was a borough before the union, and fent two members to the houfe of commons. It is 73 miles S, by W, from Dubhn, and about 9 W. from Wexford. TAGIA, a fmall ifland in the bay of Gunong-Tellu, 00 the eaft coaft of Celebes. S. lat. o^ 30'. E. long. 1 22* 6'. TAGIABAD, a town of Perfia, in the province of I„l.;.5-ae.E.ofNatens^ TAGIAH, T A G TAGI AH, a river of Algiers, wliich runs into the Medi- terranean, 24 miles E. of Oran. TAGIDOG, a river of North Wales, which runs into the AUn, 4 miles N. of Wrexham. TAGIL, a river of Ruffia, which runs into the Tura, 48 miles W. of Turinflc. TAGILSKOI, Verchn'ei, a town of Ruffia, in the province of Ekaterinburg ; 52 miles N. of Ekaterinburg. Tagilskoi, Niirui, a town of RufTia, in the province of Ekaterinburg ; 60 miles N. of Ekaterinburg. TAGIOURA, a town of Africa, in the country of TripoH ; 10 miles E. of Tripoli. TAGLARET, a town in the department of the Po ; 7 miles W. of Pinerolo. TAGLIACOZZI, or Taliacotius, Gasparo, in Biography, was born at Bologna in 1546, and praftifed with celebrity as a phylician and iurgeon in his native city from the year 1570 to 1599, where he died. The peculiar prac- tice, implied in his name, was that of reftoring loft parts by infition ; and this practice he derived from fome Neapolitan and Sicilian furgeons. It was founded on the principle, that two raw furfaces of living bodies or parts, attached to each other in clofe contaft, will adhere and mutually tranfmit circulating fluids. On this fubjeft he publifhed two trea- tifes : -viz. " Epiilola ad Hieronymum Mercurialem de Naribus, multo ante abfciffis, reficiendis," Francof. 1587; and " De Curtorum Chirurgia per Infitionem, Lib. duo, additis Cutis traducis, Inttrumentorum omnium, atque De- ligationum, iconibus et tabulis," Venet. 1597, fol. A fimilar practice has anciently prevailed in India, and is now occafionally adopted after the common punifhment of am- putating the nofe ; for reftoring which, a piece from the (kin of the forehead is ingenioufly engrafted. Modern fiu-- geons have availed themfelves of the principle, by bringing over flaps of the adjacent flaVing fometimes fucceeded. See Works abr. vol. i. p. i6o. but vide fupra. Talc, Phllofophlc, a name given by fome of the chemical writers to the flowers of zinc. This fubftance, difTolved in vinegar, affords what they have in their unintelhgible language called oil of talc, and extolled as a thing of vaft power in the fixing of mercury, and many other imaginary operations ; and befides this, they call it a fovereign remedy for all difeafes. TALCAGUANO, or Talcagiana, in Geography, a fea-port of Chili, nine miles within the point of the fame name, and about fix from the town of Conception. This is the principal port in the bay of Conception, and is much the mod frequented, as fhips that anchor here have not only better gi'ound than in any other part of the bay, but are in fome meafure fheltered from the north winds. The town, or village, as Peroufe calls it, has been built fince the city of Conception was deftroyed by an earthquake in 1751 : it ftands on the river Biobin, and is faid to contain 10,000 in- habitants. Here are the epifcopal cathedral, the feat of the bifiiop, and all the religious houfes. The government of the adjacent diftrift has been wholly military and ecclefiaf- tical. The country round it is very healthy and fertile. Great numbers of cattle are annually killed for their hides and tallow, which are fent to Lima. About 200,000 dol- lars' worth of gold is annually coUefted from the fands in the rivers of this bifhopric. The Indians of the country have numerous herds of cattle, and plenty of horfes, and live more like the Tartars of Afia than the favages of North America. Ships are here fupplied with water, wood, and other neceflaries. N. lat. 36° 42'. E. long. 73° 6'. Talcaguano Point, a cape on the coaft of Chili, 1 1 leagues N.E. of the ifland of Santa Maria, and 2 N. of Port St. Vincent. TALCAN, a town of Afia, in Tokariftan, befieged by Gengis Khan in the year 1221, and taken after a fiege of feven months ; 100 miles S.E. of Termed. N. lat. 36° 45'. E. long. 67^ 9'. TALCKENSTEIN, a mountain of Silefia; 4 miles NiN.E. of Loewenberg. TALCONAH, a town of Bengal ; 30 miles E. of Goragot. TALCOT, a town of Hindooftan, in Concan ; 25 miles N.E. of Goa. TALCOTE, a town of the ifland of Ceylon ; 20 miles W.S.W. of Candy. TALCOUS Slate, in Geology, is confidered by fome geologifts as a variety of clay-date, but it has a nearer re- lemblance to mica-flate. The colour is generally a grcenifii- grey, with a fhining luftre, like that of the finer kinds of mica-fiate. It is fofter than mica-flate, but is frequently divided into laminae by thin feams of quartz, and has a twilled or contorted form. The flate on fome of the moun- tains of the higher Alps, as defcribed by SaufiYire, feems to be of an intermediate kind between mica-flate and talcous flate. Talcous flate occurs on the weftern fide of the ifland of Anglefea, and in many alpine diftrifts, forming beds in clay-flate. See Slate. TALDINGA, in Geography, a town of Bengal; 15 miles W. of BifTunpour. TALE, in Lata, See Count aiid Declaration. Tale, or Tael, in Commerce, a weight for gold and filver in China, and certain parts of the Eafl Indies ; and alfo a money of account. In China, each tale is 10 maces := 100 candareens = 1000 cafh. A tale of fine filver fhould be worth 1000 cafh, which cafh is compofed of fix parts of Vol. XXXV. T A L eoppef, and four of lead, having a fquarc hole in the middle, fo that they may be ftrung on a firing or wire ; but on ac- count of their convenience for common ufc, their price is fometimes fo much raifed, that only 750 cafh are given for the tale. Gold is not confidered as money, but as merchandize ; and it is fold in ingots of a determinate weight, called by the Englifh " fhoes" of gold ; the largeft of which weighs 10 tales, and the gold is reckoned 94 touch (/. e. 94 parts fine in 100), though it is only 92 or 93. Of late, from 100 to 1 10 tales of filver of 94 touch, have been given for 10 talci of gold of 92 or 93 touch ; and fometimes from 1 10 to i 20 tales, or even more, of Spanifh dollars, reckoned at 92 touch, have been paid for 10 tales of gold. When gold it exchanged for filver, its price is always valued by the ten. tale weight, and it is fold either above or below touch, at follows : -viz. if the gold be 96 touch, and fold at 5 under touch, fubtraft 5 from 96, and 91 remains: then 91 talcs of filver are paid for 10 of gold : if gold be fold at 10 above touch, the finenefs being flill 96, add 10 to 96, and 106 tales of filver are paid for 10 tales of gold. Silver ingots are ufed as money, and are from ^ to 100 tales, their, value being determined by their weight. In payment of fmall fums, they fometimes lay the ingot on the fire, and by finking it with a hammer, detach fmaller pieces from it. The Enghfii reckon the tale of filver at 6s. Sd. fterling, fo that il. fterhng is =r 3 tales. The catty of 16 tales weighs 19 oz. 6 dwts. 4 grs. Englilh troy ; fo that 10 tales would weigh 5792 Enghfh grains. Upon the whole, the weight of a Chinefe tale may be taken at about j8o grains Englifh troy ; and therefore 48 tales = 58 ounces troy weight. One hundred Spanifh dollars weigh about 722 tales. The heavielt weight for merchandize (peculiar to the coafl of Canton) is called pecul, and contains 100 catties or 1600 tales, with the fame decimal divifion as above. Hence a pecul = 132 lbs. 8 oz. 9 dr. avoirdupois: and a catty =: 21 oz. 35dr. avoirdupois. At Acheen, in the ifle of Sumatra, accounts are kept in tales, pardows, mace, copangs, and cafhes. A tale = 4 par- dows =: 16 mace = 64 copangs. The coins of the country are mace and cafhes. The mace is a fmall gold coin weighing nine grains, and worth about 14//. fterling. The cafhes are fmall pieces of tin or lead, 2500 of which ufually pafs for a mace, fubjeft to occafional variation. In Si.im, accounts are kept in catties, tales, ticals or tuals, miams» fanangs, and cowries. The catty is 20 tales : the tale = 4 ticals =16 miams =32 fanangs : the fanang is = 800 cowries. In Tonquin, accounts are kept in tales of 10 mace or 1 00 candareens. The tale weighs here I oz. 4dwt. HI g""*- Englifh, which is about 10 grs. more than the Chinefe tale. Kelly's Cambift. TALED, in the Jewijh Antiquities, a fort of habit that the Jews wore, chiefly when they repeated their prayers in the fynagogue. Numbers, xv. 38. Deuteronomy, xxii. 12. It ferved inftead of that fquare garment they wore here- tofore, to wliich Mofes had appointed that they (hould faften borders of blue to the four quarters, and fringes or ribbands all along the borders. But at prefent, that they may not be expofed to the laughter of tlie people for the too great fingularity of their drefs, they content themfelves with wearing a fquare piece of cloth underneath, with four tufts at the fourcorners, and when they meet in the fynagogue to fay their prayers, they cover their heads with a iquarq woollen veil, which has four tufts at its four corners. It is this they call thald, or taled. Calmet, Did. & Leo of Modena, Ceremonies of the .lews, p. i. ch. 11. G TALEGONG, T A L TALEGONG, in Geography, a town of Hindooftan, in Do\vlatabad ; I ; miles S. of Oudighir.— Alfo, a town of Baglana ; 12 miles S. of Chandor. TALEKAN, a town and caftle of Perfia, m the pro- unce of Khoraffan ; 160 miles N.E. of Herat.— Alfo, a town of Perlia, in the province of Irak ; 30 miles N.L. ot Hamadan. _ r xt- 1, TALENNI, a town of Japan, in the illand ol Niphon ; 160 miles W.N. W. of Meaco. TALENT, Talentl'm, a weight, and a com, both very famous among the ancients ; but very different in different count lies. • -n vru The value of the talent it is very hard to allign in JinglUti money, as being ufcd among all the people throughout the Ealt, and its value, and the manner of computation, being different among each : a difficulty abundantly fliewn by Budius, in his learned treatil'e "De Affe." There were various kinds of talents, both with regard to weight and to fpeeies ; the value of thefe kit ftill increafing, as the metal of which they confiftcd was purer, though the talent weights contained the fame number of pounds and drachms. Accordingly, all talent weights are equally fixty mina;, and the mina oiic hundred drachms ; but the drachma of one place exceeding that of another, there hence arofe a difference in the talents. The common Attic talent then (the talent weight \ve mean) contained fixty Attic raina;, or fix thoufand Attic drachmx ; equal, according to Dr. Arbuthnot's redudion, to fifty-fix pounds, eleven ounces, feventeen and one-feventh grains, Englilhtroy weight. There was another Attic talent, by fome faid to confift of eighty, by others of one hundred minae. The Egyptian talent was eighty minx ; the Antiochian alfo eighty ; the Ptolemaic of Cleopatra eighty-fix and two-thirds ; that of Alexandria ninety-fix ; the Infular talent one hundred and twenty ; and that of Antioch three hundred and fixty minx. In the valuation of money, the Grecian talent, according to Dr. Arbuthnot, was equal to fixty minx, or reckoning the mina at 3/. -ff. -fd. equal to 193/. 15^. ; the Syrian talent in this valuation confiiled of fifteen Attic minx ; the Ptolemaic of twenty ; the Antiochian of fixty ; the Euboic of fixty ; the Babylonic of feventy ; the greater Attic of eighty ; the Tyrian of eighty ; the Eginean of one hundred ; the Rho- dian of one hundred ; and the Egyptian of eighty minx. (See Arbuthnot's Tables of Ancient Coins, &c. p. 33, and Tab. 18, 19. 23, 24.) Stating the Attic drachm of filver at nine-pence of our money, the beft medium value, the mina of Athens will be worth 3/. 15^. ; and the Athenian common talent, 225/. ; and the reft may eafily be eftimated in pro- portion. But Mr. Raper makes the Attic talent, which confifted of fixty minx, or fix thoufand drachmx, each drachm being equal to fixty-fix grains and a half troy weight, or 3/. I "js, 4,V<^. ilerhng, equal to 232/. 3J. Sec Drachm. This ingenious writer alfo obferves, that hiftorians and others mention the Eginean and the Euboic talent. The former weighed ten thoufand Attic drachms ; but, like other talents, contained only fix thoufand of its own ; which being fo much heavier than the Attic, the Athenians called it OTa;:^!i«v ifo.xu'^'i or the thick drachm. This talent was \ifed at Corinth ; and in a paffage of Aulus Gellius, lib.i. c. 8. it is valued at ten thoufand Attic drachms ; and was pro- bably ufed in moft of the cities of Peloponnefus. If the Attic drachm weighed fixty-fix and a half troy grains, the Eginean ftiould weigh one hundred and ten and five-fixths, •wiuch Mr. Raper ftates at one hundred and eleven. This T A L Eginean talent he concludes from the mean drachm of ITk Macedonian coins, which he found to be one hundred and eleven grains and one-fourth, muft have been the ftandard of the Macedonian money, till Philip changed it. And it ap- pears likewife to have been the ftandard of the Ptolemaic money in Egypt. Phny indeed (Nat. Hift.lib. xxxiii. c. 3.) tells us, on the authority of Varro, that the Egyptian talent weighed eighty Roman pounds ; but he fuppofes that this is a falfe reading, and that for ^gyptium we ftiould read Euboicum : for Pliny is fpeaking of the riches of Afia, where the Euboic talent was ufed for weighing gold ; and it is known, that the weight of that talent was fettled at eighty Roman pounds, by the treaty between the Romans .ind Antiochus. There is a paffage in Pollux (hb. ix. c. 6. § 86. ) which makes the Egyptian talent contain fifteen hundred Attic drachms. But this, he apprehends, is an injudicious interpolation in the laft coUeftion of that author. The Euboic talent, fays this writer, certainly came from Afia ; for Herodotus (lib. iii. feft. 8g. ) tells us, the kings of Perfia weighed their gold by that talent : in the fame place he informs us, that the Babylonian talent weighed feventy Euboic minx. Pollux fays, it weighed feventy Attic minx. Therefore the Euboic talent ffiould be equal to the Attic. But iElian (Var. Hift. hb.i. c. 22.) tells us, that it weighed feventy-two Attic minx ; and if fo, the Euboic talent ftiould be heavier than the Attic, in the proportion of feventy-two to feventy. By two paffages, cited by Mr. Raper, from Xenophon, Exped. lib. i. it appears probable, that the Babylonian talent weighed above feventy Attic minx, and above feventy Euboic minx ; and if Pollux took his value of the Babylonian talent from Herodotus, as the text now ftands, and jElian his value of the fame from a more correft copy of that author, or from fome^better autho- rity, the Euboic talent muft have been equal to the Attic. Accordingly it contained fix thoufand Attic drachms. Phil. Tranf. vol. Ixi. part ii. p. 483, &c. There is another tiJent much more ancient, and much lefs than any of thofe already mentioned, which Dr. Arbuthnot calls the Homerical talent of gold, fuppofed, he fays, to be equal to three Attic aurei. Pollux fpeaks of fuch a talent. Euftathius upon Homer reckons it worth twenty-four drachmx. That its value was fmall, whether ftxed or un- certain, is conjeftured from the paffage of Homer, where, defcribing the prizes at the funeral of Patroclus, two talents of gold are propofed as a more inconfiderable prize than a mare with foal, &c. Hence Mr. Raper, ubi fupra, p. 527, concludes, that it was the fame that the Dorian colonies car- ried to Sicily and Calabria : for Pollux teUs us, from Ariftotle, that the ancient talent of the Greeks in Sicily contained twenty-four nummi, each of which weighing an obolus and a half, the talent muft have weighed fix Attic drachms, or three darics ; but the daric weighed very little more than one guinea ; and if two talents weighed about fix guineas, we may reckon the mare with foal worth twelve ; which was no improbable price, fince we learn from a paffage in the Clouds of Ariftophanes, that, in his time, a running horfe coft twelve minx, or above forty-fix pounds fterling ; therefore this feems to have been the ancient Greek talent, before the art of ftamping money had introduced the greater talents from Afia and Egypt. According to this ancient talent, fays Dr. Arbuthnot, fome reckon the treafure of king David, particularly that mentioned 1 Chron. xxii. 14. which, according to the common reckoning, would amount in gold talents to the value of 547,500,000/. and the filver to above 342,000,000/. ; or reckoning according to the decuple proportion of gold to filver. TAT T A L filver, the two fums would he equal. As David reigned in Judea after the ilege of Troy, it is not improbable but Homer and he .-inght ufe the fame numeral talent of gold. It is fuggefted by Mr. Piiikerton (ElTay on Medals, vol.i.p. 65.) thatall the ancient coins of Afia, Africa, Greece, Magna GrKcia, and Sicily, were reducible to three talents or ftandards. i. That of Egina, ufed in moft of the more ancient filver coinages ; and as it would feem in even the later of Egypt, Carthage, Greece, &c. 2. The Attic, being the Afiatic gold ftandard ; afterwards ufed by Phidon, ling of Argos, in eftimating gold, and called Euboic, from Eubosa, one of the quarters of the city of Argos. It was afterwards ufed in Athens, and the greater part of the world, as the ftandard both of gold and filver. 3. The Doric, or Sicilian talent, of 24 nummi, each worth an obolus end a half : whence the talent is eftimated at fix Attic drachms, or three darics. Thefe weights continued to be the ftandard of money after it began to be diftinguiftied by impreflion ; nay, to the fall of Greece, and prevalence of the Roman empire. Among the Romans there were two kinds of talents, the tittle and the great talent ; the little was the common talent ; and whenever they fay fimply talentum, they are to be under- ftood of this : the Iktle talent was fixty minas or Roman poimds ; the mina, or pound, eftimated at one hundred drachmx, or denarii : it was alfo eftimated at twenty-four great fefterces, which amounted to fixty pounds. The great talent exceeded the lefs by one-third part. Budsus computes, that the little talent of filver was worth 75/. fterling ; and the greater 99/. 6s. 8rf. fterling. The greater of gold was worth 1 125/. fterling. Talent, as afpec'ies, or money, among the Hebrews, was fometimes ufed for a gold coin, the fame with the Jheiel of gold, called alfo /later, and weighing only four drachms. The Hebrews reckoned by thefe talents as we do by pounds, &c. Thus a million of gold, or million of talents of gold, among them, was a million of ftiekels, or nummi ; the nummus of gold being the fame weight with the ftiekel, ■viz. four drachms. But the Hebrew talent weight of filver, which they called dear, was equivalent to that of three thoufand ftiekels (Exod. xxxviii. 25. 28.) or one hundred and thirteen pounds, ten ounces, one pennyweight, ten grains and two-fevenths, Englifti troy weight, according to Arbuthnot's compu- tation. It ftiould be obferved, however, that the talent was not every where the fame. The Hebrew talent weighed more than that of the Greeks, and is faid to have amounted to 341/. 10s. A^d. and J. The common Attic talent might be ■worth about 193/. 15/. which might probably have been ufed by the Jews in their commerce. TALESj in Law, a fupply or addition of men for thofe impannelled on a jury of inqueft, and not appearing, or at their appearance challenged by either party as not indifferent. In I'uch cafe, the judge, upon motion, grants fupply to be made by tlie (heriff^ of one or more tales, fuch as are prefent inecjrt, equal in reputation to thofe impannelled. For this purpofe, a writ of decern tales, o&o tales, and the like, was ufed to be ifliied to the fheriff' at common law ; and muft be ftill fo done at the trial at bar, if the jurors make default ; but at the affizes, or nifi prius, by virtue of the ftatute 35 Hen. VIII. c. 6. and other fubfequent ftatutes, the judge is impowercd, at the prayer of either party, to award a tales de c'lrcumjlantthus, of perfons prefent in court, to be joined to the other jurors to try the caufe ; who are liable, however, to the fame challenges as the principal jurors. This is ufually done till the legal number of twelve be com- pleted. The tales de c'lrcumjlant'ibus is jn fome mcafure rfn- dered ufelefs by the ftatute fur regulating juries, 3 Geo. II. c. 25. See Challengk and Juiiv. TALGA, in Geography, a town of Hungary ; 8 milet N. of Tokay. TALGARTH, a fmall town in a hundred of the fame name, and county of Brecon, South Wales, is fituated on the banks of the river Llyfni, at one end of the Black Mountains, which ftretch hence into Hercfordlhire : from its fituatioii it derived its name ; Talgarth meaning literally the front of the hill. Tiie town is a borough by prefcription, but without privilege, jurifdiAion, or municipal officers. The parifli church is a fubftantial edifice, but has no archi- teftural elegance, nor is it enriched by any remarkable monuments, ancient or modern : it has a tower, which forms a confpicuous objeft from moft parts of the furrounding country. The population of the parifti, which, befides the borough, contains five hamlets, was in the year 1811 re- turned to parliament as 1 1 24, the number of houfes being 274. No lefs than eight annual fairs are held here. In the Foreft hamlet of the parifli of Talgarth are fonie veftiges of Dinas-caftle, which, at a remote period, was a fortrefs of importance, but has long fince been demolifhcd. In Leland's time, it was " ruinus almoft to the hard ground." From his defcription, it muft have been of con- fiderable dimenfions. It coufifted of three wards " waullid about," and had three parks and a foreft attached to it. From the fame writer we learn, that thecaftle was deftroyed by the natives, that it might not be occupied by the favourers of Owen Glendwr Beauties of England and Wales, vol. xviii. South Wales, by T. Rees, F.S.A. CarUfle'* Topographical Diftionary of Wales. TALGAUTPORAM, a town of Hindooftan, in My- fore ; 6 miles S. of Bangalore. TALGRISTAN, a town of Perfia, in the province of Irak ; 50 miles E. of Nchavend. TALGUL, a town of Hindooftan, in Myfore ; 10 miles S.S.W. of Sirpy. TALHA-KIAMEN, a poft of Chinefe Tartary. N. lat. 46° 16'. E.long. 123° 44'. TALHAM, a town of Auftria ; 2 miles S.S.W. of Voglabruck. TALI, a town on the W. coaft of the ifland of Formofa. N. lat. 23° 36'. E. long. 129° 41'. Ta-LI, a city of China, of the firft rank, in Yun-nan. This is the principal place where they make curious tables, and other ornaments of fine marble, which is got from a mountain called Tienjung, and is naturally beautified with different colours, in the form of mountains, flowers, trees, and rivers. Ta-li has under its jurifdiftion four cities of the fecond order, and three of the third; 1205 n.iles S.W. of Peking. N. lat. 25° 45'. E. long. 100°. TALIA, in Ancient Geography, a town of the Upper Moefia, on the route from Viminatium to Nicomcdia. Ant. Itin. TALJARA, in Geography, a town of Bengal ; 46 miles S. of Curruckdeah. TALIFAY, a town on the N. coaft of the ifland of Lu?on. N. lat. 14- 21'. E. long. 123° 24'. TALIGALEA, in Botany, an unexplained name, Aublet Guian. 625. t. 252. Jufl". 109, appears to be the fame genus, and even the fame fpecies, as Amasonia of Linnsus. (See that article.) The fruit of the latter having been examined in a drier ftate, may folve all the difficulty, Aublet defcribesTiis only fpecies, T. campejirls, as an herb with a perennial root, fometimes creeping. Slemt aunual* G 2 two T A L two or three feet high, fimple, leafy, downy. Leavts slier- natc, ftalked, eUiplical, pointed, from three to fix inches long, downy, with tooth-like fcrratures. The variety with a creeping root has fmooth leaves, and we ftiould prefume it may be a diftind fpecies. The Jlawers are yellow, about an inch lont^, numerous, in a long compound clujler, with ovate purple iraatoj. Berry hlaek, with two hard feeds — -Tliis plant grows abundantly in the fandy meadows of the idand of Cayenne, as well as on the continent of Ssuth America, bearing flowers and fruit all fummer long. TALIGONG, in Geography, a town of Hindooftan, in the Carnatic ; 7 miles N. of Tcrriore. TALIGOV, a town of Ruflia, in the government of Riga ; 24 miles N. of Dorpat. TALIHOU, afmallilland, with a lazaretto, onthecoaft of France. At low-water the land which joins to the con- tinent is dry ; 3 miles N. of La Hogue. N. lat. 49° 36'. W. long. 1° 9'. TALINA, a town of Peru ; 50 miles E.S.E. of Lipes. TA-LIN-HO, a town of Chinefe T.artary. N. lat. 41° 10'. E. long. 1 20'' 50'. TALINUM, in Botany, a genus of Adanfon's, well feparated by him from the Linnian Portulaca. ( See that article.) Its name no one, not even De Theis, has under- taken to explain ; Adanfon having given fo many barbarous, and even arbitrary ones, that the inquiry might well be deemed alike hopelcfs and unprofitable. We conjefture, however, that he muft have had in liis mind the verb SaA?.ie, to ie verdant, or fiouri/hing, and confequently OxMc, or 9a>dcc, M green bough ; for he often wrote words with a T which in Greek begin with a 9 ; and the above idea is fuitable enough to the fucculent, and durably verdant, habit of the genus. We hence learn the true accentuation of the word, 7a/T««m. Ehrhart called this fame genus Rulingia, after Dr. John Philip Killings, who publifhed at Gottingen, in 1774, a catalogue of the genera of plants, difpofed in natural orders. Linnaeus had formerly diftinguifhed it by the name of jinacampferos Adanf. Fam. v. 2. 245. JulT. 312. Willd. Sp. PI. V. 2. 862. Ait. Hort. Kew. v. 3. 148. Purlh 365. Lamarck lUuftr. t. 402. Gsrtn. t. 128. (Riilingia; Ehrh. Beitr. v. 3. 132. Orygia ; Forik. ^gypt.-Arab. 103. Anacampferos ; Linn. Gen. ed. i. 152. Sims in Curt. Mag. p. 1367.) — Clafs and order, PolyanJrla Monogynia. (Dodecandria Monogynia, Willd.) Nat. Ord. Succulenta, Linn. Portulacett, JufT. Gen. Ch. Cal. Perianth inferior, of two or five oblong, rather unequal, permanent leaves. Cor. Petals five, fpread- Ing, ovate, obtufe, as long or longer than the calyx. Stam. Filaments numerous, capillary, not half fo long as the corolla ; anthers incumbent, oblong. Pijl. Germen fupe- rior, roundiih ; ftyle fimple, about as long as the corolla ; ftigmas three, oblong, reflexed. Perk. Capfule ovate, of one cell, and three, five, or fix valves. Seeds numerous, roundifh, affixed to a globular central receptacle. EfT. Ch. Petals five. Calyx of two or five leaves. Cap- fule fuperior, with from three to fix valves, one cell, and many feeds. SeAion I. Stipulas none. Seeds without wings. I. T. trianguhire. Triangular-ftalked Yellow Talinum. Willd. n. I. Ait. n. i. (Portulaca triangularis; Jacq. Amer. 147. Obf. fafc. 1. 35. t. 23. P. racemofa ; Linn. Sp. PI. 640. Heliaiithemum frutefcens, portulacas foho ; Plum. Ic. 142. t. 150. f. 2.) — Leaves flat, channelled, wedge-(haped, emarginate, with a fmall point. Clufter fimple, with a triangular ft.ilk. Stem fpreading Native of the fea-lhores of the Weft Indies. Cultivated in Chelfea garden in 1739. Mr. Alton fays it bloflbms in the ftove, T A L moll part of liic fummer. The Jlcm is Ihrubby, two feet high, round, fmooth, branched, decuii.Vient in the lower part. Leaves fcattered, about one and a hai£ or two inches long, fucculent, fmooth, fliining, brittle, entire aithe edges; occafionally convex, being reflexed at the fides, tapering at the bafe into a fliort footftalk. Flowers two or nwre, on a terminal triangular ftalk, very elegant, of a brilliant yellow, without fcent. Calyx of two leaves. Capfule with tlisee valves. 2. T. crajftcaule. Thick-ftemmed Red Talinum. (T. craflifolium; Willd. n.2. T. patens; Andr. Repof. t.253., Ait. n. 2. Portulaca craflicaulis ; Jacq. Hort. Vind. v. 3. 29. t. 52. P. craffifolia ; Murray in Linn. Syft. Veg. ed. 14. 446.) — Leaves flat, obovate, entire at the point. Co- rymbs compound, elongated. Stem ereift — Native pro- bably of the Well Indies. Jacquin cultivated it at Vienna, and we have feen it flowering in many of the Englifh ftoves. This differs from the former in its more ereft and thicker fiem, as well as in the fine pink colour of ilsjloiuers. The leaves moreover are not emarginate. The corymbofe, or panicled, many-flowered /aMj, at firft terminal, are fome- times overtopped by the aggregate leafy branches, and thus become lateral, or axillary. Murray, from mere inadver- tence in tranfcribing, altered Jacquin's original name, for one which has here no appropriate meaning — Willdenow feems to have copied him, without feeing the work of Jac- quin ; which from this, and fome other inilances, we fufpeft he had not in his pofleffion. We do not think it neceifary to perpetuate fuch an error, any more than that of Andrews, who took this plant for Willdenow's T. patens, fee n. 4. 3. T . fruticofum. Shrubby White Talinum. Willd. n. 7. (Portulaca fruticofa; Linn. Syft. Veg. ed. 13. 371. P. paniculata ; Linn. Sp. PI. 640. P. americana latifolia erefta, floribus albis ; Comm. Hort. v. i. 7. t. 4.) — Leaves flat, obovate, fomewhat emarginate. Corymbs compound, elongated. Stem creft. Calyx of five leaves. — Native of the Weft Indies, or of South America. This fpecies, a ftranger to our gardens, appears to differ eifentially from the two foregoing in having five leaves to the calyx, inftead of two ; to fay notliing of the white petals. In habit, leaves, and injlorefcence, it comes very near the laft. The capfule is faid to confift of three valves in both. 4. T. patens. Panicled Red Talinum. Willd. n. 4. Haworth Succ. PL 123. (T. panic ulatum ; Gsertn. v. 2. 219. Portulaca patens ; Linn. Mant. 242. Jacq. Hort. Vind. V. 2. 71. t. 151. P. paniculata ; Jacq. Amer. 148.) — Leaves flat, obovate, obtufe. Panicle repeatedly com- pound, forked, many -flowered. — Native of rocks on the fea-coaft of Martinico and Hifpaniola. Jacquin. We have feen it in the Englifh ftoves, as Mr. Haworth likewife appears to have done, when he remarks that the patens of Andrews is a widely different plant. ( See our 2d fpecies. ) That before us has an upright fhrubby Jlem, one and a half or two feet high, branched ; fomewhat quadrangular below. Leaves fcattered, or imperfeftly oppofite, obovate, lanceo- late or oval, more or lefs obtufe, very fmooth and juicy ; the lower ones three inches long, the reft fhorter ; all tapering at the bafe into a fhort fuutjlalh. Panicles folitary at the top of the ftem and branches, creft, from fix to ten inches long, with numerous, moftly oppofite, repeatedly fubdivided, and partly forked, flendtr, fmooth, fpreading ftalks, accom- pariied here and there by fmall lanceolate bradttas at their bafe. Flowers numerous, fmall, inodorous. Calyx of two orbicular, concave, red, widely fpreading leaves. Petals five, obovate, red, thrice the fize of the calyx, hkevpife widely fpreading. Capfule globofe, fmaller than a pepper- corn, its three valves, whi^h Jacquin defcribes as double, or of twe T A L T A L two layers, fufpended from the top of three intermediate fibres. See Gitrtner's figure and defcription, where tlie fynonym of CommeHn, which belongs to the foregoing, is very erroneoufly cited for the prefent fpecies. This miiil have arifen from Linngeus's having once called the former Portulaca pati'tculata, and Gcertiier's having copied tlie above fynonym without examination. 5. T. reflexam. Panicled Yellow Talinum. Cavan. Ic. V. I. I. t. I. Havvorth Succ. PI. 124. Curt. Mag. t. 1543. Ait. Epit. 375. (T. patens g; Willd. n. 4.) — Leaves fomewhat convex, elliptic-lanceolate, acute. Panicle twice compound, many-flowered Native of South America. — An annual or biennial, fcarcely flirubby, plant in our lloves. Mr. Haworth obferves, it is more tender, and much taller, than the laft, of which Willdenow thought it a mere variety. We are not fure that the differences indicated in our fpecific charafters are fufficient or permanent, not having had an opportunity of comparing the two plants. The flowers of T. rijlexum being yellow, feems an important diilinftion in this genus. Both fpecies are faid to be abundantly pro- pagated by feed. 6. T. cuneifolium. Wedge-leaved Talinum. Willd. n. 5. (Portulaca cuneifolia ; Vahl Symb. v. i. 33. Orygia por- tulacifolla ; Forflc. jEgypt.-Arab. 103.) — Leaves flat, wedge-fhaped, obtufe, with an occafional point. Panicle many-flowered ; its lower branches umbellate, three- flowered. — Native of Arabia Felix A Jhrub three feet high. Leaves eatable, alternate, fpreading, feflile, taper- ing at the bafe, about an inch long, thick and fmooth. Calyx of two unequal leaves, deciduous. Pettils of a violet red. Stamens green, with yellow anthers. Capfule three- angular, of three valves. Seeds black, comprefled, fmooth. Forjkall. — Vahl fays this fpecies is akin to T. patens, n. 4, but differs in having thicker Jloiver^a/is, the lower ones bearing three-flowered umbels. 7. T. decumbens. Decumbent Glaucous Talinum. Willd. n. 6. ( Portulaca decumbens ; Vahl Symb. v. i. 33. Orygia decumbens; Forlk. ^gypt.-Arab. 103.) — Leaves flat, obovate, pointed. Clufters axillary. Stem decumbent. Calyx of five leaves Native of Arabia Felix, in ftony places near Mufa, but not common. Forjkall, Stem fhrubby, with angular branches, clothed, like the reft of the plant, with a gla\icous mealinefs. Leaves diftant, ftalked, thickifh, fomewhat wavy. Clujlers from thebofoms of the uppermoft leaves, with an awl-fhaped fcale, or braBea, oppofite to each partial ftalk. Capfule of five valves. Vahl. — Forfkall de- fcribes numerous lanceolate/f/aZr, about twenty, of a reddifh violet ; and five cells, as well as valves, to the capfule. 8. T. teretifoHum. Cylindrical-leaved Talinum. Purfh 11. I. — " Leaves cylindrical, flelhy. Corymbs ftalked, ter- minal."— On funny rocks in Delaware and Virginia, flower- ing in July. Perennial. Flowers purple. Purjh. Seftion 2. Stipulas luithinfide of the lea-ves, jagged. Seeds •winged. 9. T. Anacampferos. Round-leaved Talinum. Willd. n. 3. Ait. n. 3. " Decand. PI. Graffes, t. 3." (Rlihngia Anacampferos ; Ehrh. Beitr. v. 3. 133. Haworth Succ. PI. 124. Portulaca Anacampferos ; Linn. Sp. PI. 639. P. africanafempervirenSjflorerubicundo ;Comm.Hort. v. 2. 177. t. 89. Telephiaftrum folio globofo ; Dill. Elth. 375. t. 281.) — Leaves ovate, acute, fmooth ; convex and tumid beneath. Stipulas filamentous, many times fhorter than the leaves. Petals obovate. — Native of the Cape of Good Hope. Cul- tivated by Sherard in 1732. A greenhoufe plant, flowering in July. A humble fhrubby fpecies, whofe extremely thick and fucculent leaves, about an inch long, give it the habit of an Ahe. They are feflile, of a pale glaucous green, not na- in- fliining ; their upper fide nearly flat, with a longitudinal furrow ; the under very convex. Slipulas fliort, in many capillary fegments. Flotvers crimfon, the fize of our fecond or third fpecies, in long-ftalked terminal fimple cluflers, which are fometimes two together. Calyx of two leaves. Petals fomewhat pointed. The feeds are faid to be winged. Ehrhart calls them arillata, tunicated. — The fpecific name, borrowed from PHny, derived from xyaxafM7r%, to return, and !3o?, love, was at firtl adopted by Linnxus as a generic appel- lation for the prefent plant, when he confidered it as a dif- tindl genus from Portulaca, in liis earlier publications. But this name, and the foolifh fuperftition to which it alludes, of the very touch of the lierb retlorlng alienated love, rather belongs to the Sediim Anacampferos of Linnaeus, and its near relation S.Telephium. See Sedim. 10. T. arachnoides. Cobweb Talinum. Ait. n. 4. (Ana campferos arachnoides ; Sims in Curt. Mag. 1. 1368. Riilin gia arachnoides; Haworth Succ. PI. 125.) — Leaves ellip- tical, acute ; flightly convex, and covered with cobweb-like down above ; tumid beneath. Stipulas filamentous, fhorter than the leaves. Petals elliptical Found by Mr. MafTon at the Cape of Good Hope, and fent to Kew about the year 1790. It is treated like the laft, and agrees with that fpecies in general habit, though fmaller in fize. The leaves are lefs glaucous ; the lower ones covered with a kind of web. Stipulas longer and more robull. Flowers white, with a faint blulb. Seeds obferved by Mr. Haworth to be lefs winged The leaves are reprefented in the Botanical Magazine with a tinge of purphlh-brown. Perhaps Mr. Haworth's Riilingia rubens, n. 3, may be only a higher-coloured variety. II. T. filamentofum. Thready TaUnum. Ait. n. y. (Anacampferos filamentofa ; Sims in Curt. Mag. t. 1367. Riihngia filamentofa; Haworth Succ. PI. 125.) — Leaves ovate, bluntifh, tumid and covered with cobweb-hke down on both fides. Stipulas filamentous, longer than the leaves. Petals lanceolate Found by Mr. Maffon, at the Cape of Good Hope, and fent to Kew a few years after the laft, from which it differs in having fmaller, blunter leaves, and much longer, more confpicuous, Jlipulas, whofe feg- ments are linear and flattened, like ftiavings of horn. Tne petals are rofe-colourcd, and elliptic-lanceolate, very fuga- cious, as in the two foregoing fpecies. We have never feen Mr. Haworth's Riilingia lanceolata, n.j, but it feems, by his definition, nearly akin to this. The winged feeds can hardly entitle the fpecies of this feAion to form a feparate genus, there being fo little differ- ence in habit. If they did, the name of Riilingia muil cer- tainly be preferred to Anacampferos, the latter, notwithftand- ing its right of priority, having been arbitrarily and errone- oufly applied to thefe Cape plants, with which the ancients were of courfe unacquainted. See our remark under the 9th fpecies. TALIO, Lex Talionis, or Pcena Talionis, a rct.-diation, or punifhment, by which an evil is returned porft-ftly hke that committed againft us by another ; which is what we ufually exprefs by the words, eye for eye, tooth fur tooth. The pcena talionis was enjoined by tlie law of Mofes, among the Jews ; it was cfteemed a natural piece of juftice, and yet the Romans fet it atide, inafmuch as fuch a parity or equality of puniflimcnt could not always be obferved. For this reafon the pra'tor allowed fuch as had fufFered an injury to make an cftimale of it in nioiny, that juftice might be done him that way ; only rei'erving to himfelf the power of moderating the fame. And this was what was conftantly praftifed, and thus the /ana talionis became quite difuftd with them. TALISIA, in Botany, a barbarous name of Aublet's, which. T A L which lie appears to have fabricated out of the Caribbean appellation of the plant in queftion, Toulichi. We (hoiild be incxciifable in giving more than a temporary fantlion to fuch a name, till the genus is eith.r better known than at prefent, or fet alto'n'iher afide. — Aubl. Guian. 349. Jul!'. 247. Lamarck lUuftr. t. 310. — Clafs and order, Oilandria Mono- gyitia. Nat. Ord. Sapindi, Ju(T. Gen. Cli. Cal. Perianth inferior, of one leaf, in five deep, acute fegments. Cor. Petals five, ovate, inferted into the orbicular receptacle of the flower beneath the gcrmen. Nedary of five fhort, hairy, upright fcales, one inferted into the bafe of each petal, covering the ftamens. Stam. Fila- ments eight, fhort, inferted into the orbicular receptacle ; anthers oblong, of two cells. Pijl. Gcrmen fuperior, mi- nute, roundifli, of four cells ; ftyle one, very (hort ; ftigma fimple, obtufe. Penc. unknown. EfT. Ch. Calyx in five deep fegments. Petals five. Neftary of five hairy fcales, attached to the petals. Germen of four cells. 1. T.giiiiinenjls. Toulichi of Guiana. Aubl. Guian. 349. t. 136. — Native of banks of rivers in Guiana, flowering in Oftobcr A flirub, whofe tnmi is three or four feet high, and as many inches in diameter, with a greyifli bark, and whitifli wood ; the branches long, compound, varioudy fpreading. Leaves alternate, pinnate, very large, each confifl;ing of about thirty alternate, ftalked, elliptic-lanceolate, pointed, entire, fmooth, veiny leaflets, befides an odd one, from five to fix inches long, and above one broad. Clujlers axillary and terminal, doubly compound, many-flowered, all over of a fine rofe-colour, with a fmall fcaly hraSea under each fub- divifion. Flowers fmall, in little tufts, nearly feflile. — No- thing is known of the/rmV, except that the germen has four cells, nor is any thing recorded concerning the qualities or ufes of this plant. TALISKERAN, in Geography, a town of Perfia, in the province of Adirbeitzan ; 100 miles N.N.E. of Ar- debil. TALISMANS, magical figures engraven or cut under certain fuperftitious obfervances of the charafterifms and con- figurations of the heavens ; to which fome aftrologers, her- metical philofophers, and other adepts, attribute marvel- lous virtues, particularly that of calling down celeftial in- fluences. The word is pure Arabic ; though Menage, after Salma- fius, thinks it may come from the Greek ■nXtsrfj.a., operation, or conjecrat'ion. Borel fays it is Perfian, and fignifies literally an engraven conftellation. Others derive it a talamacis Uteris, which are myfterious charafters, or cyphers, ufed byforcerers, thus called from lalamafca, a phantom, or illufion. The author of a book, entitled, Talifmans jujlifiez, fays, a tahfman is the feal, figure, charadler, or image of a hea- venly fign, conftellation, or planet, engraven on a fympa- thetic ilone, or on a metal correfponding to the ftar, &g. in order to receive its influences. The talifmans of the Samothracians, fo famous of old, were pieces of iron, formed into certain images, and fet in rings, &c. They were held prefervatives againft all kinds of evils. There were other talifmans taken from vegetables, and others from minerals. In the general, we may diftinguifh three kinds of talif- mans. AJlronomical, which are known by the figns or con- ttellationsof the heavens engraven on them, with other figures, and fome unintelligible charatlers. Magical, wliich bear very extraordinary figures, with fuperftitious words and names of angels unheard of. And mixt, which confift of figns, and barbarous words j but have no fuperftitious ones, or names of angels. T A L Some rabbins maintain, that the brazen fcrpent, raifed by Mofes in the wildernefs, for the deftruftion of the fcrpents that annoyed the Ifraelites, was properly a talifman. All the miraculous things wrought by Apollonius Tya- nasus are attributed to the virtue and influence of talifmans : and that wizard is even faid by fome to have been the in- ventor of talifmans. Some authors take feveral Runic medals, at leaft medals whofe infcriptions are in Runic charafters, for talifmans ; it being notorious, that the northern nations, in their heathen ftate, were much devoted to them. M. Keder, however, has fliewn, that the medals here fpoken of are quite other things than talifmans. TALISSE, in Geography, a fmall ifland in the Eaft Indian fea, neai- the N. coaft of the ifland of Celebes. N. lat. 1° 40'. E. long. 124° 50'. TALK, in Mineralogy. See Talc. TALKAN, in Geography, a town of Perfia, in the pro- vince of Irak ; 30 miles E. of Sultania. TALKEAVE, a town of Perfia, in KhoraflTan ; 50 miles E. of Tabaflvili Alfo, a town of Perfia, in Segeftan ; 21 miles S.W. of Kin. TALKHAN, a town of Grand Bucharia; 80 miles S.S.W. of Balk. TALKING. See Speaking. TALLAGH, in Geography, a poft-town of the county of Dublin, Ireland, where is the ancient and noble refidence of the archbifliops of Dublin ; 5 miles S.W. by W. from Dubhn. TALLANO, a town of Corfica, and capital of a dif- trift, in the department of the Liamone, fituated in a bay of the Mediterranean, called the " Gulf of TaUano ;" 30 miles S.S.W. of Corte. N. lat. 41" 33'. E. long. 9° II'. TALLAPOUR, a town of Hindooftan, in Oude ; 22 miles N.E. of Lucknow. TALLARAPESCET, a town of Perfia, in the pro- vince of Mazanderan ; 2 1 miles S. of Fehrabad. TALLARD, a town of France, in the department of the Higher Alps, on the Durance ; 9 miles S. of Gap. TALLARO, in Commerce, a filver coin of Tufcany, Venice, and Ragufa. At Florence the tallaro is = 6 lire or 9 paoU, the hre bemg worth about 8^/. The new tallari of Ragufa, called libertine, coined between 1791 and 1794, are of the weight of i oz. 10 carats, containing 9 parts of pure filver to 6 of alloy ; and the value of the tallaro was reckoned at 80 groftetti. Since 1 796 there have been coined ducats of 40 groifetti, containing 9 parts of pure filver and 1 1 of alloy. The ducat of 1 796 is worth i 7,\d. fterling, which is nearly the value of the Turkifli piaftre of the latell coinage. By Mr. Bingley's aflay, the mint price of filver in Eng- land being jj. 2d. per ounce ttandard, the tallaro of Venice (■5, &c. in proportion) is worfe than Englifh ftandard (W. ) I oz. 3 dwts., its weight iSdwts. lofgrs., its content in pure filver 367.1 grs., and value in fterhng 4^. ■^^d. The tallaro and its divifions are marked with the head of a woman, legend, Refpublica Veiteta ; reverfe, a winged lion, and a book ; legend, the reigning doge's name, thus Paulo Rainario duca. The affay of the tallaro of Ragufa, or Ragufian of 1759, is W. 4 oz. 2 dwts., its weight 18 dwts. 7^ grs., its con- tent in pure filver 256.4 grs., and its fterling value 2J. I \\d. That of 1774, W. 40Z. 4dwts., weight 18 dwts. 85 grs., content in pure filver 253.3 grs., and value zs. \\\d. That of 1794, W. 3 oz, i9dvrts., weight 18 dwts. 17^ grs., con- tent 267.6 grs., and fterling value 3^. i\d. The ducat of 17971 T A L ■'7W> ^^^- 5°'' 1 1 dwts., weight 8 dwts. i7:Jgrs., content 57 grs., and value is. l^d. The tcillaro of Ragufa is marked with the head of the chief magiftrate, called the rcttor ; legend, Reilor Reip. Rhacitftn ; reverfe, arms of the city ; legend, Ducat et Sum, Reip. Rac. In the Levant, and other places, the term tal- laro is applied to dollars in general. Kelly's Cambiil. TALLEVENDE, in Geography, a townof France, in the department of the Calvados, containing near 3000 inhabit- ants, chiefly employed in the mamifafture of earthenware ; 2 miles S.W. of Vire. TALLIAGE, Tai-LAgium, a certain rate, according to which barons and knights were anciently taxed by the king towards the expences of the ilate, and inferior tenants by their lords, on certain occafions. That raifed to the king was on his demefnes, efcheats, and ivardfhips, and upon the cities and burgiis of the realm. When it was paid out of knights' fees, it was called y^j/Za^f (which fee) ; when by cities and burghs, talliage ; when upon lands not of a military tenure, hidage ; which fee. This latter talhage of the cuftomary tenants was fome- times fixed and certain, and fometimes at tiie pleafure of the lord ; and was alfo fometimes compounded for. Talliages were anciently called cuttings ; which name is ftill retained in Ireland, though in a different fignification. Talliage, fays fir Ed. Coke, is a general name including all taxes ; and is derived from the French taille, tax, founded on the tally of petty tradefmen ; as the country people appointed to colleiil it, not being able to write, fcored down what they received on tallies. See Land-tax and Sub- MDY. TALLIKA, in Geography, a town of Africa, in the kingdom of Bondou, inhabited by Foulahs of the Ma- hometan religion, in the road of the caravans ; 70 miles W.S.W. of Fatteconda. N. lat. 13° 56'. W. long. 1 1° 40'. TALLIPOUR, a town of Hindooftan, in Bahar ; 10 miles S.E. of Hajypour. TALLIS, Thomas, in Biography, the mailer of Bird, and one of the greateft muficians, not only of this country, but of all Europe, during the i6th century, in which many ;;ble contrapuntiils fiourifhed. He was born early in the reign of Henry VIII. ; but though it has frequently been afferted that he was organift of the chapel royal during the reigns of that monarch, Ed- ward VI., queen Mary, and queen EUzabeth, yet it would be difficult to prove that, in the three iirft of thefe reigns, laymen were ever appointed to any fuch office. In the reign of Henry, and his daughter Mary, when the Roman Catholic religion prevailed, the organ, in convents, was ufually played by monks ; and in cathedrals and collegiate churches and chapels, by the canons, and otliers of the priefthood. The firft lay orgajiills of die chapel royal upon record were Dr. Tye, Bhthman, the mailer of Dr. Bull, Tallis, and Bird ; all during the reign of queen Elizabeth. 1 nough the melody or plain-fong of the cathedral fervice was firft adjufted to Englifh words by Marbeck, yet Tallis enriched it with harmony. Indeed the melody ufed by Talhs is not exaftly fimilar to that of Marbeck, it is only of the lame kind ; confifting of fragments of the ancient ec- clefiaftical canto fermo. But the harmony in vi'hich he has clothed it is admirable ; and the modulation being fo an- tique, chiefly in common chords or fundamental harmony to each note of the diatonic fcale, often where the moderns have fixths, fevenths, and their inverfions, produces a folemn and very different effeft from any mufic that has been com- pofed durmg the laft century. As all melody, in which the femito-.ies are avoided, mufl refemble that of Scotland-; T A L fo all harmony, in which neither the tr'ttonus nor faife fifth occurs, and where the fecond, third, and fixth of the k -y, are only accompanied with common cho'ds, muft remind ug of that which prevailed in the fixteenth century ; and though fo ancient, appear new to our ears, from its long difufe. There are two compofitions by Tallis for the organ, prc- ferved in queen Elizabeth's Virginal Book, one of'which is dated 1561, ar.d the other 1564; both built upon a dull and unmeaning ground, or fragment of plain-chant (f.tlix namque), and both alike dry, elaborate, and difficult, to hands formed by modern mufic. The little melody and rhythm in the compofitions of thefe times required all the harmony that could be crowded into them. Notes are mul- tiplied witiiout end, and difficulties created without effect. It is not by the inftrumental mufic, which had been but little cultivated, that we mufl judge of the genius of old mailers ; but by vocal, in parts : where the harmony and contrivance compenfate for want of accent, talle, and inven- tion. The Latin motets and hymns, or " Caiitiones facroe," which he publidied jointly with thofe of his difciple Bird, are perhaps the bed of his compofitions that have been pre- ferved. Thefe appeared in 1575, under the following title : " Cantiones qux ab Argumento facrx vocantur qiiinque et fex Partium. Autoribus Tiioma Talliffio et Gulielmo Birdo, Anglis, Sereniffima; Rcginas Majeftati a private facello Gcnerofis et Organiilis." At the time of this pub- lication, a very arbitrary and monopolifing patent was granted by queen Elizabeth to thefe compofors, for twenty- one years, not only for the publication of tlieir own produc- tions, vocal and inftrumental, but thofe of all other mufi- cians, whether Enghili, Frencli, or Italian, as well as for the fole ruling and vending of mufic-paper. Moft of thefe excellent compofitions, of which the words were originally Latin, were afterwards adjufted to Enghfh words by Dr. Aldrich, and others, for the ufe of our cathedrals. The canons, inverfions, augmentations, dimi- nutions, and other learned and fafhionablc contrivances of the times, which were of very difficult accomplilhment, are carried to a wonderful degree of ingenuity in thefe pro- dudlions. Dr. Thomas Tiidway, of Cambridge, made a very valu- able colleftion of Enghfh church mufic, in fcore, from the Reformation to the Reftoration, in fix volumes, thick 4to. for Lord Harlev, afterwards earl of Oxford, which is now among the Harleian manufcripts, in the Britifli Mufeum, No. 7337. In the firft volume of this coUedlion we have the whole fervice of Tallis in D minor, in four pai'ts, con- fifting of the Te Deum, Benediilus, Kyrie Eltifon, Credo, Magnificat, Nunc Diniittis, and Litany, as printed in 1760, by Dr. Boyce ; with feveral anthems in four and five parts ; as, " Wipe away my fins ;" " With all our hearts and mouths ;" " O Lord, give thy holy fpirit ;" " I call and cry;" and his anthem, " Difcomfit them, O Lord!" er- roneoufly faid by Dr. Tudway to have been ftt for the vic- tory over the Spanifli Armada, 1588. In Chrift-Church, Oxford, are nianufcript fcores of his Prices, Litany, and Anthems, among others by Bird, Farrant, Bull, Gibbons, and Child. Five of his motets and full anthems, in five parts, to I-atin and Englifli words, are likewife here preferved among liie works of other Eng- hfh mafters, in Dr. Aldrich's coUedlion. But the moil curious and extraordinary of all his labours was his " Song of forty Parts," which is ftill fubiilling, and now before us. This wonderful effort of hrjmonical abilities is not di- vided into choirs of four parts : fopraiio, altus, tenor, and bafe, in each, like the compofitions a moiti cori, of Bencvoli, and others ; but confiitg of eight trebles, placed under each other J T A L other ; elclit mez.zi foprani, or mean parts ; eight conntcr- tcnors ; eight tenors ; and eight bafcs ; with one line allotted to the organ. All thofc feveral parts, as may be imagined, are not in fimple counterpoint, or filled up in mere harmony, without meaning or defign, but have each a (hare in the fhort fubiefts of fugue and imitation, which are introduced upon every change of words. The firft fubje£l is begun in G, by the firft mezzo foprano, or medius, and anfwcred in D, the fifth abovf, by the firft foprano ; the fecond me- dius in like manner beginning in G, is anfwered in the oftave below by the firft tenor, and that by the firft counter-tenor in D, the fifth above ; then the firft bafe has the fubjeft in D, the eighth below the counter-tenor ; and thus all tlic forty real parts are feverally introduced in the courfe of thirty-nine bars, when the whole vocal phalanx is employed at once, during fix bars more. After which a new fubjeft is led off" by the loweft bafe, and purfued by other parts, feverally, for about twenty-four bars, when there is a general chorus of all the parts ; and thus this ftupendous, though perhaps Gothic, fpecimen of human labour and intelleft, is carried on in alternate flight, purfuit, attack, and choral union to the end ; when the Polyphonic phenomenon is ter- minated by twelve bars of univerfal chorus, in quadragin- tefimal harmony. The entire compofition confifts of one hundred and thirty-eiglit bars, in alia breve time. This venerable mufician died in November, 1585, and was buried in the old parifh church of Greenwich, in Kent. The following epitaph, which Dr. Boyce has printed in the firft volume of his CoUeftion of Cathedral Mufic, Strype, in his Continuation of Stow's Survey, printed 1720, fays he found engraved in Gothic letters, on a brafs plate in the chancel. " Enterred here doth ly a worthy wyght. Who for long tyme in mufick bore the bell : His name to (hew was Thomas Tallis hyght. In honeft vertuous lyfF he did excell. He ferv'd long tyme in chappel with grete prayfe Fower fovereygnes reignes, (a thing not often feene) ; I mean king Henry and prince Edward's dayes, Quene Marie, and Elizabeth our queue, He maryed was, though children he had none, And lyv'd in love full three and thirty yeres With loyal fpowfe, whos name yclept was Jone, Who here entorab'd, him company now bears. As he dyd lyve, fo alfo dyd he dy. In myld and quyet fort, O happy man ! To God ful oft for mercy did he cry. Wherefore he lyves, let Deth do what he can." The ftone to which this plate was affixed had been re- newed by Dr. Aldrich ; but the old church having been pulled down, about the year 1720, in order to be rebuilt, no memorial remains of Tallis, or any other illuftrious per- fon, who had been interred there anterior to that period. TALLOW, a fort of animal fat, melted down and cla- rified. There are fcarcely any animals but a fort of tallow may be prepared from j but thofe which yield the moft, and of which the moft ufe is made, are the horfe, bullock, (heep, hog, goat, deer, bear, and viper. Some of which tallows, or fats, are ufed in medicine, and called axung'ia. Moft of the reft are ufed in the making of foap, and the dreffing of leather ; but chiefly in making of candles. For this purpofe, large quantities are annually imported from RuiTia in ca(ks. (See Candle.) Tallow-chandlers alfo melt tallow, which is done by chopping the fat, as it is tjjien from oxen aijd (heep, and then boiling it for fome time in a large copper ; and when the tallow is extrafted by tlus T A L procefs, the remainder is fubjefled to the operation of a ftrong iron prefs ; and the cake that is left, after the tallow is expreffed from it, is called a " greave." With this dogs are fed, and moft of the ducks that are reared in the vale of Avle(bury, and which fupply the London markets. It is alfo fometimes given to oxen and pigs, but certainly without meliorating the flavour of the meat. It has been obferved, that candles (hould be made without any admixture of oil or greafe ; and when laid up, (hould be preferved from the aftion of the atmofphere. For this purpofe, fome perfons keep their candles clofely covered up in bran. If tallows are weak, a part foon becomes con- verted to an acid by expofure to the air ; and this renders the whole, when melted together, unfit for candles. Tallows, alfo, that contain a large portion of febacic acid, require much more barilla than good tallow, in the manufafture of foap, and yet produce a lefs quantity. Foreign tallows, which frequently contain a large portion of acid, rendering them inferior to the Englilh, may be purified at an infignifi- cant expence by chemical means ; and by the proper appli- • cation of chemical agents, other brown tallows may be ren- ■ dered beautifully white, and fit for the beft purpofes. The mode, fays a chemical writer of reputation, which naturally prefents itfelf as the beft for feparating the febacic acid from tallow, is that of melting it in water containing fome alkali ; but old tallows may in general be fufliciently purified from their rancidity by melting them upon lime-water, and giving a confiderable agitation to the whole mixture ; for when the water is again luffered to fubfide, it will be found to be of- fenfive in fmell, and to have fubtrafted moft of the impurities of the tallow. If the tallow, however, (hould not be fuifi- ciently purified, a repetition of this procefs would completely effeft it. Parkes's Chemical EflTays, vol. i. p. 67, &c. Tallovi -Tree, in China, is a tree growing in great plenty in that country, which produces a fubftance like our tallow, and ferving for the fame purpofe. See Croton ■ Sebiferum. * All the preparation they give it, is to melt it down and mix a little oil with it, to make it fofter, and more pliant. — It is true, their candles made of it ^neld a thicker fmoke, fl and a dimmer light than ours ; but thofe defefts are owing, ^ in a great meafure, to the wicks, which are not of cotton, but only a little rod or fwitch of dry light wood, covered with the pith of a ru(h, wound round it ; which being very porous, ferves to filtrate the minute parts of the tallow, attrafted by the burning ftick, which by this means is kept burning. T ALhow -Chandlers' Greaves, in j^griculture, the refufe of tallow-chandlery, which is found at the bottom of the pan, after the melting of tallow, in a fort of cake, and which is an excellent 7nanure ; which fee. Tallow, in Geography, a poft-town of the county of Waterford, Ireland, fituated within half a mile of the river Bride, on which there is a village called Tallow-bridge. It was a borough which returned two members, previous to the Union. It is 104 miles S.W. by S. from Dublin, and 4 S. from Lifmore. Tallow Point, a mark for anchoring in the harbour of Port Royal, in Jamaica. TALLOWING, in Rural Economy, a term applied to the property or means of forming tallow internally in animals of fome kinds, efpecially thofe of the (heep and neat cattle forts. It has been ftated in the corrected Agricultural Re- port of the County of Snftex, that it is by no means a fettled point upon the South Downs of that diftriA, how far a (heep, which gathers its fat upon the inteftines, is or is not pre- ferable to another which collefts it upon the back and the neck, T A L T A L- neck. The Leicefterlliire gra/.iers, it is faid, contending as much for the latter as the former, is confidered as a tell of merit in Norfolk, and, various other counties. But when it is confidered, that it requires a certain portion of food to create a given quantity of fat, the queilion is, it is thought, which is the belt part to colleft it upon, — \^•ithin or without ? As long as the fat of the latter will fell at more than one- third of the other, it would fcem, it is faid, that there can- not be a dovibt which of the two is preferable ; and that, upon the principle of food eaten to produce the tallow or fat, that which tallows the leaft is the beft breed. The tal- low, with the major part of the fifth quai-ter, is all the butcher's profit, it is faid, who would no doubt encourage that breed which tallows beft, and yields moil offal. It is noticed, however, that the South Down (lieep are not great tallowers, compared with fomc other forts ; but that what they lofe in tallow, they make up in a difpofition to fatten. The tallow of a wether, i'.i common management, will, it is faid, [generally average from an eighth to a tenth part of its dead weight. In a fat wether of Mr. Ellman's, one-feventh pai-t of the dead weight was, it is faid, infide fat (caul and loofe fat) ; and that in another which was fince killed, one-fixth was infidc fat. In others, too, that have been flaughtered, the variation has been found from a feventh to a tenth. The quantity of infide fat depends, it is faid, much upon the age and time of fattening. It gathers itfelf much more in old fheep than in young ones. The bad ill-formed breeds of fheep, for the mofl part, tallow in the largeft and moil favourable manner ; and the fame is moflly the cafe in neat-cattle ftock, as thofe which have the beft forms and difpofitions for fattening have com- monly the leaft property of tallowing well, or afford the leaft proof, as it is often called. In regard to the fuperiority of fat meat, it may be juft noticed that, in fome great thoroughfares for travelling, the inn-keepers agree with the butchers to give them a penny the pound above the common price for mutton, provided it be very fat. It is likewife the fame with beef. This is faid to be the cafe at Petersfield, and to ilrongly (hew that very fat mutton, or meat of any kind, will go much farther than that which is not equally fo. It, however, makes againft tal- lowing in animals of thefe kinds. See L,iVE-Sioci and Sheep. TALLWATER, in Geography, a river of Ireland, in the county of Armagh, which runs with the CaUen into Blackwater, near Charlemont. TALLY, Taile, or Ttiilk, a piece of wood on which retail traders ufe to fcore or mark, by notches or incifions, the feveral quantities of goods they deliver out on credit, to fave the trouble of writing down fo many httle articles in books. Each fcore confifts of two pieces of wood, or rather of a fingle piece cleft length-wife, the parts of which falling in with one another, things delivered are fcored on both at the fame time ; the feller keeping one, and the buyer the other. Tallies are taken as evidences in courts of juftice, as much as books. The ancient way of keeping all accounts was by tallies ; the debtor keeping one part, and the cre- ditor the other. Hence the lallkr of the exchequer, now called the teller. There are three kinds of tallies mentioned in our ftatutes, and long ufed in the exchequer ; -via. Tallies of Loans, one part of which is kept in the ex- ' chequer, and the other part given to particular perfons, in lieu of an obhgation for the monies they have lent to the government on ails of parliament. This laft part is called Vol. XXXV. the Jloci, and the former the counler-Jloch, or the conntcr- tail. The tallies are numbered, and bear the perfon's name, and the fum lent : thus we fay, tiic tallies, N" have been paid, or difcharged ; tallies are rifen, fallen, 4, 5, &c. Tallies, or Ta'iks of Debt, are a kind of acquittances for debts paid to the king. E. gr. The univerfity of Cambridge pays yearly ifl/. for fuch things as are by charter granted them in fee-farm. He that pays this receives a taile, or tally, for his difcharge, with which, or a note of it, he repairs to the clerk of the pipe, and there R)r the tally receives a full difcharge oi» parchment. Tallies of Reivard, or allowance. Thefe are made t» (lieriffs, for fuch matters as (to their charge) they have per- formed in their office, or by fuch money as is by courfe cafl on them in their accounts, but which they cannot levy. In the exchequer there is a tally-court, where attend the- two deputy chamberlains of the exchequer, and the tally- cutter. TALLY-Co«n/cr. See Counter. Tallies, Cutter of the. See Cutter. Tally, Petty. See Petty. Tallies, Writer of. See Writer. Tally the Sheets, at fea, a word of command, when the flieets of a main-fail or fore-fail are to be hauled aft. See Sheets, Tally for Flowers and Plants, in Gardening, that fort of mark or contrivance, either by pieces of lead or flips of wood, employed for diftinguifhing thera. The practice of marking flowers, trees, and plants, with talhes of fome kind or other, is always highly ufeful and necetTai-y in regulating their culture, as well as for many other purpofes. TALLYOOR, in Geography, a town of Hindooftan, in Myfore ; 8 miles N.W. of Dindigul. TALMAS, a town of France, in the department of the Somme ; 9 miles S. of Dourlens. TALMAY, a town of France, in the department of the Cote d'Or, at the union of the Vigenne and the Sa6nc ; 18 miles N.E. of Dijon. TALMOND, afea-port town of France, in the depart- ment of the Lower Charente, on the right fide of the Gi- ronde, with a harbour ; 18 miles S.W. of Saintes. TALMONT, a town of France, in the department of the Vendee; 6 miles E.S.E. of Sables d'Olonne. TALMUD, or Thalmud, from -|V^^n> doar'inr, from "XO^, he taught, a .Tewifh book, which contains a col- leftion of all that relates to the cxphcation of tlieir law. The Talmud is the body of the Hebrew law ; a compila- tion of expofitions of the duties impofed on the people, either in fcripture, or by tradition, or by authority of their doftors, or by cuftom, or even by fuperftition : to fpcak more plainly flill, it is the courfe of cafes of confcience, or of moral theology, in which the duties are explained, and the doubts cleared, not by reafoning, but generally by au- thority, by the cuftoro of the nation, and by the decifions of the moll approved of the ancient dotlors. The Talmud confifts of two general parts, the one called the Mifchna, the other the Gemara; which firft part is alfo frequently called abfolutely the " 'i'almud," the general name of the whole work. The Jews divide their law into written, which is that con- tained in the books of Mofes ; and unwritten, which is that conveyed by tradition. This latter is, in effeft, no other than a glofs or interpretation of the former, given by the ancient rabbins, H The T A L The Talmud then contains the traditions of the Jews, their polity, duftrino, and tercmonics, which they obforvc as rcligioufly as the law of God itfelf : they would never put them in writing till they were compelled to it by the de- ftruftion of Jerufalem, and till they faw themfclves difperfed throughout the werld. They had two famous fchools ; the one at Babylon, and the otlier at Jerufalem : in thefe they made two feveral col- feftions of thofe traditions ; the firft at Jerufalem, the other at Babylon ; but both called Talmud, both exceedingly re- verenced, efpecially the Babylonian, though full of extra- vagancies. This was compiled by tlie Jews of Mefopotamia, about 500 years after Chrift, according to Buxtorf : but Father Morinus offers feveral reafons to prove that it was not finiihed till the year 700. The laft edition of this Tal- mud, at Amltcrdam, is in twelve folios. The Talmud of Jerufalem is the Icaft efleemed. It was compiled by tiie Jews of that city, and particularly by Rabbi Jochanan, rcftor of the academy at Tiberias, about 300 years after Chrift, according to Buxtorf; but Father Morinus, in his " Excrcitationes Biblica:," lib. ii. exerc. 6. judges, from feveral bai-barous terms found in it, of Vnndalic or Gothic extraction, that it did not appear till the fifth century. This is publllhed in one large folio. The Babylonian Talmud confifts of two parts : the one tlic text, the other the glofs or comment : the comment, called the Gemara, contains the decifion of the Jewilh doc- tors, and their expofitions of the text. — This we find ftuffed with dreams and chimeras; together with much ig- norance, and many impertinent queftions and difputations : the ftyle is alfo very coarfe. On the contrary, the text called the Mtfchna, is written in a tolerably pure ftyle, and the reafonings generally much more folid. The Jews pretend that this was compofed by Rabbi Juda, fornamed the Saint ; and that God revealed to him the doc- trine, and the chief myfteries of it. But this is only to be underftood of the Mifchna, not of the Gemara, the compilation of which was' not begun till the fixth century, after the dcftru&ion of the fecond temple. Rabbi Juda is faid to have compofed the Mifchna under the empire of Antoninus, in the fecond century ; but they do not all agree about this antiquity, fome carrying it back much farther. It is the Talmud of Babylon that is ufually read, and moft frequently confulted, among the Je%vs ; fo that when tliey fay fimply " the Talmud," they always meant this ; never quoting the other without the addition of Jerufalem. Maimonidcs has made an abridgment of the Talmud, which Scaliger prefers to the Talmud itfelf ; as being purged of many of the fables of which the other is full. It is a fyftem of the laws and cuftoms of the Jews, both of their civil and their canon law, ajid the beft of their traditions. About the year 1236, a Jew of Rochelle, well verfed in the Hebrew, becoming Chriftian, made a journey to pope Gregory IX., and difcovered to him a number of errors in the Talmud : thefe the pope fent, in thirty-nine articles, to the archbilhops of France, with a letter, appointing them to feize the books of the Jens, and to burn all fuch as ftiould con- tain thofe errors : in confequence of which order, about twenty cart-loads of Hebrew books were burnt. He vrrote to the fame effeft to the kin^s of England, France, Ara- gon, Caftile, &c. His fucceflbr. Innocent IV., giving commiflion to his legate, Eudes de Chateauroux, to examine the Talmud, and other Jewifti books, more carefully, and to tolerate fuch errors as were not contrary to the Cluiftian religion ; the legate wrote to the pope, that to tolerate them was to ap- T A L prove them ; and the 1 5th of May, 1 248, he alfo conderan^d them juridically to the flames ; and Pa\d IV. ordered 12,000- volumes of the Talmud to be confumed ; and Clement VIII. ordered all the talmudic books that could be found to be de- ftroyed ; a zeal worthy of the Papal fee ! See MiscHNA, Gemara, Caraites, and Rabbixists. TALO-CHAN, in Geography, a fmall ifland near tlic coaft of China. N. lat. 29° 57'. E. long. 122° 4'. TALOIRE, a town of France, in the department of Mont Blanc ; 8 miles S.S.E. of Annecy. TALON, in Ornithology, the claw of a bird. Talos, in ArchiteHure, a kind of moulding, confifting^ of a cymatium, crowned with a fquare fillet ; frequently found to terminate ornaments of joiners' work, as thofe of doors, &c. The word is French, and literally Cgnifies heel. The talon, more properly fo called, is a moulding con- cave at the bottom, and convex at top ; haN-ing an effeft juft oppofite to the doucine. \\'hen the concave part is at top, it is called an inverted talon. The talon is ufually called by our Englifli workmen ogee, or O.G. and by authors an upright or in-verted cymatium. TALOO,in Geography, a harbour on the N. coaft of Ri' meo ; which fee. TALOVKA, a river of Ruffia, which unites OTth the Analik, and runs with it into the Irgis, 32 miles E. of Vollk, in the government of Saratov. TALPA, the Mole, in Zoology, a genus of the Mam- malia Ferae, the charaAers of which are, that the front teeth in the upper jaw are fix and unequal, thofe in the lower jaw are eight ; the canine teeth are one on each fide, the upper ones being the largeft ; and that the grinders are feven in the upper jaw, and fix in the lower. Gmelin enumerates four fpecies, befides feveral varieties. Species. EuroPjEA ; Common Mole. Has a (hort tail, and pen- tadaclylous or five-toed feet. The body is thick and cy- Hndric ; the fnout flender, but very ftrong and tendinous ; the head not diftinguifhed from the body by any appearance of neck ; the legs fo extremely fhort, as fcarcely to projeft perceptibly from the body ; the fore-feet fituated obliquely outwards, exceflively ftrong and broad, and fumifhed with very large and ftout claws, fo as to give the animal the power of working under the furface with the utmoft eafe and readi- nefs ; the hind-feet are fmall in proportion to the fore-feet, and are calculated for throwing back with eafe the mould from behind the creatiu-e, during his fubterraneous progrefs ; the tail is fhort and fmall ; the fkin is much thicker aiid tougher in proportion than in other quadrupeds, and the fur with which it is covered equally furpaffes that of other ani- mals in finenefs and foftnefs. The mufcular ftrength of the mole is very great, and it is enabled to force itfelf into the ground with an extraordinary degree of celerity. The ge- neral length of the mole is about five inches and three quar- ters, exclufive of the tail, which meafures one inch. This animal is fuppofed to pofTefs the power of hearing in an ex- quifite degree ; and if at any time it emerges from a fub- terraneous retreat, inftantly difappears on the approach of any danger. When firft taken, either by digging it out or otherwife, it utters a fhrill fcream, and prepares for defence by exerting the ftrength of its claws and teeth. According to the count de Buffon, fo hvcly and reciprocal an attachment fi'bfifts between the male and female, that they feem to dread or difrclifti all other fociety. It has been doubted whether the mole has eyes adapted to ▼ifion. T A L vifton, or merely for the purpofe of apprizing it of the ap- proach of light, fo as to warn it of the danger of cxpofure. Galen is of the former opinion. Sir Thomas Brown refers this to the clafs of vulgar errors ; but Derham, by dilTec- tion, and the aid of a microleope, confirmed the opinion of Galen. This animal is faid to feed not only on worms and infefts, &c. but on the roots of vegetables: however, it is more carnivorous than frugivorous. In particuLtr circum- ftances it is very fierce and voraciousv Without damp mould for its relidence, it is kept alive with difficulty in a Hate of confinement. Like other animals of a black colour, the mole is fometimes found perfeftly white, or creauKoloured, and fometimes fpotted. Gmelin reckons four varieties, "vit. the vai-iegated or fpotted mole of Edwards, the wiiite, the yellow, and the cinereous. Of its furprifnig power in Iwimraing, we have a curious initance recorded in the 3d vo- lume of the Tranfaftions of the Linnjeaii Society ; which is that of a mole that was feen fwimming towards a fmall ifland in the middle of the loch of Clunie, in Scotland, at the diftance of 180 yards from the land. Linnxus and Gmelin affirm that the mole paffes the winter in a ftate of torpidity ; but this is contradifted by Buffon, and he alleges fadls to prove the contrary. The mole is faid to be unknown in Ireland. In Siberia it attains a larger iize than in Eu- rope, and its fur is fo foft and beautiful, that it would make the moil elegant articles of drefs, were it not for the difficulty of curing and dreffing the {Icin. See Mole. AsiATiCA. Has no tail, and tridaftylous fore-feet. This is the Siberian mole of Pennant. It is fomewhat fmaller than the common mole, its length being four inches ; and is a na- tive of the, Cape of Good Hope. LoNGlCAUDATA. With a tail of middhng length, and pentadaftylous feet, the hinder ones fcaly. This is the long-tailed mole of Pennaiit : its length from iiofe to tail is four inches and fix-tenths ; and it is a native of North America. Rubra ; Red Mole of Pennant. Has a fliort tail, tri- da£Iylous fore -feet, and tridaftylous hind-feet. This is faid to be a native of America. Dr. Shaw mentions fome other fpecies, as the 7". purpu- rafcens, or black mole, with a glofs of purple^ pentadafty- loBS feet, and white tail, firft defcribed by Seba, and by him faid to be a native of Virginia : — the 7". rad'iata, or black mole, with v.'hite feet, and nofc radiated with papilla: ; an inhabitant of North America : — the Sorex crijlatus of Liu- naius ; a variety, as Dr. Shaw fays, of the T. longicaudata: — and the T.fujca, or brown mole, with white teet and tail, the fore-feet very broad ; a native of North America, and fup- pofed to be the fame with the Sorex aquaticits of Linnaeus. Talpa, (a mole,) in Surgery, a tumour, which makes its way under the Ikin, as a mole under the furface of the ground. Such is faid to be the derivation of the terra. Talpa is often ufed in the language of furgery, to exprefs an encyiled tumour, which forms on the head, and contains a pap-like matter. See Atheboma. TALPA R, in Geography, a town of Perfia, in the pro- vince of Irak ', 70 miles N.W. of Hamadan. TALPARIA, in Surgery, an encyiled tumour, filled with a pap-like matter. See Talpa. TALPIA, in Geography, a town of Chinefe Tartary, in the country of Hami ; 28 miles N.E. of Hatamtam. TALSENGHE, a town of Hmdooitan, in Vifiapour ; 10 miles S.W. of Vifiapour. TALSHIDE. SeeTALwooD. TALSPERG, a town of France, in the department of the Upper Rhine ; 12 miles E. of Porcntrui. r A M TALTITZ, a tovfn of Saxony, in the Vogtiand ; 4 miles S. of I'lauen. TALUS, in Analomy, a name formerly given to the allragalus, or that bone of the foot which is articulated to the leg. (See ExTitKMiTiES.) This bone in the pecori has a cubic (liape ; and was employed by the ancients in their famous game, ludus talorum. (See Ariftotle, Hill. Anim. lib. ii. c. 1.) For the various appellations of this well-known bone in moll of the European and Oriental languages, and for its form in dilfereiit animals ; fee Th. Hyde, Hilloria Talorum, in vol. ii. of his Syntagma Dif- fcrtationura, Oxon. 1767, 410. Talus, or TiJud, in /Irchketlure, the inclination or flope of a work ; as of the outfide of a wall, when its thickiiefs is diminiflicd by degrees, as it rifes in height, to make it the firmer. Talus, or Talud, in Fortification. — Taltts of a bajlion, or rampart, is the Hope or diminution allowed to fuch a work ; whether it be of earth, or ftone ; the better to fupport its weight. The exterior talus of a work, is its flope on the fide to- wards the country ; which is always made as little as pof- fible, to prevent the enemy's efcaladc, unlefs the earth be bad, and then it is abfolutely neceflary to allow a confider- able talus for its parapet, and fometimes to fupport the earth with a flight wall, called a re-uctcmmt. The interior talus of a work, is its flope on the (ide to- wards the place. This is larger than the former, and has, at the angles of the gorge, and fometimes in the middle of the curtains, ramps or Hoping roads for mounting upon the terre -plain of the rampart. Talus, Superior, of the parapet, is a flope on the top of the parapet, that allows of the foldiers defending the covert-way with fmall-fhot, which they could not do if it were level. TALWOOD, Taliatura, in our Old Writers, fire- wood cut and cleft into billets of a certain length : it ij otherwife written talghwood and taljhide. Stat. 34 & 3^ Hen. VIII. c. 3. 7 Edw. VI. c. 7. 43 Eliz. c. 14. TALYSIAN, in Geography, a town on the E. coall of the iflaiid of Borneo. N. lat. 1^48'. E. long. 117° 40'. TAM, a river of China, which runs into the Ta; 5 miles S.E. of Khi, in Pe-tche-li. Tam, El, a town of Perfia, in Segeftan, on the Heei^ mund ; 25 miles E. of Zarcng. TAMA, a town of Circaffia, on the Black fca ; 60 mile* E.N.E. of Theodofia. TAMACH. See Taisacii. TAMACHABAD, a town of Hindooftan, in Benares; 18 miles W. of Benares. TAMACLIPA, a town of Mexico, in the proTince of Gualleca ; 52 miles N. of Paiiuco. TAMACUIL, a town of Mexico, in the province of Guafleca ; 40 miles S. of Panuco. TAMAHOO, a fmall ifland in the Eaftern Indian fea, near the wed coafl of Borneo. N. lat. 0° 7'. E. long. 109'' 21'. TAMALAMEQUE, a town of South America, in the province of St. Martha, on the river Magdalena ; 160 miles S. of St. Martha. N. lat. 8=^40'. W. long. 73° 0'. TAMALAPATRA, in the Materia Medico, a name by which fome authors have called the folium Indicum, or In- dian leaf, ufed in medicine. The tree which produces this leaf i« the laurus tajfia of H 2 Linnxu*, T A M Lin'nafUS, or eaffia llgnra tree. It is a large and lofty tree, the flow.TS uiid fruit of which refemble the cinnamon-tree. Its kaves, when full grown, are ten inches or more in length ; and fix or eight in breadth. The flowers {land in clullers, in the manner of umbels on the tops of the branches, and are of a ga-eni(h-white colour. The fruit is of the bignefs of our currant. The ancients recommended Indian leaf as ftomachic, fudorific, and cephalic. At prefent, it is utterly difre- garded, being only kept in the (hops as an ingredient in mithridatc and thcriaca ; and is, in its greateft perfection, far inferior to the mace wliich our college direfts as a fuc- cedanenm to it. See Cassia Lignea. TAMALIPAN, in Geography, a chiin of mountains in Spanilh North America, called by Alcedo, in his defcription of New Leon, the Grand Sierra, and a branch of which is called tile Eallern Tamalipa by Al/ate. This laft branch extends from the defarts of Jaumape to the callern coall of the province of Santander, where it is marked in the Spanifh chart of the gulf of Mexico by the names of various peaks ; while the mountain of Orcafites, viiible at fea at the diftance of J 60 miles inland, muft nearly equal Orizava in height, and appears to belong to the fame branch of the grand ridge of Tamalipa. TAMALMA, a town of Africa, in the country of Kawar ; I20 miles N. of Kanem. TAMAMES, a town of Spain, in the province of Leon ; i 5 miles E. of Civdad Rodrigo. TAMAN, an idand at the mouth of the Kuban, and a principahvy belonging to it, and alfo a town on the fame ifland, called Phanagoria, (wliich fee.) This principality was anciently occupied by the Chazarcs ; but it was wrefted from them in the year 965 by the Ruffian combined with the Byzantine Greeks, who made themfelves mailers of the countries bordering on the fea of Azof in 1015, and com- pletely overturned the Chazarian Hate, creating a d'.ftinft principahtv on the ifle of Taman, to which both the Cha- zarcs and the Zichians were for a long time tributary. See Tmutarakak. Towards the end of the nth century, while Ruffia was torn bv inteftine broils, the principality of Taman was loft to that empire. At length, in 1221, the Mongoles made their firft attack. The Romanes were expelled or fubdued, but the Ziches fought for their liberty, and could not be made to fubmit till the year 1277, when they were over- po'vered by Margu-Timur-Khan and the famous Nogay. Neverthelefs, they retained fome degree of independence in their woody and mountainous regions. The Ottomans indeed, in 1484, conquered the cities and forts of Taman, Teraryuk, and Atfchuk : but they gained no fovereignty over the Tfchcrkaffians or Circaffians. At the peace of 1774, the fultan of the Ottomans relinquifhed his pofieffions in thefe parts ; but, contrary to treaty, held Taman and Temryuk in a ftate of fiege, till the Crimean khan, by the aid of the Ruffians, drove the Ottoman garrifon out of them. By the treaty of the year 1783, Ruffia obtained, together with the Crimea and the Eallern Nogay, the northern part of the Kuban as far as the promontory of Caucafus. The Zichians or Tfchekians, called by the Ruffians Yafi, are the principal inhabitants of the ille of Taman. They formerly paid a fmall tribute to the Crimean khan, but in all other refpecls are governed by their own beys. The ifle Atfchuk or Atfchuycf is likewife inhabited by Zichians. Thefe two tribes, wliich, properly fpeaking, are only one collateral branch of the Tfcherkafiians, have be- T A M longed to the Ruffian empire, as inhabitants of the Kuban, fince the year 1783. Taman, the ilrait or channel that forms a communi- cation between the Black fea and the fea of Azof. TAMANAH, a fca-port town of Hindooftan, on the coatl of Malabar, in the country of Concan ; 25 miles S. of Gheriah. N. lat. 16" 30'. E. long. 73° 15'. TAMANDUA, in Zoology, a creature called in Englillt the ant-bear ; and by the Brafilians tamanduaguaeu ; and the tanianvir of Buffon ; different fpecies of the fame genus. See Mykmkcoi'Iiaga. TAMAR, ill Geography, a confiderable river, which originates in the county of Cornwall, England, and fepa- rates that county, except for the fpace of a few miles, from Devon (hire. It riles in a moor in the parifli of Morwinftow, about three miles from the North fea : paffing near Whit- ftone, about ten miles from its fource, it reaches Tamerton, which takes its name from this river ; here it receives the waters of the V/errington, and about a mile and a half fur- ther its current is increafed by the Attery, which runs under the walls of the town of Launcefton : at Poulfton- bridge it is a wide and rapid ftream ; a mile below Graifton- bridge it is joined by the laney, which, rifing in Alternon, paffijs through the parilhes of Lewanick and Lezant. In the parifh of Stoke -Climfiand, the Tamar has a high, ftrong, Hone bridge, called by Leland " Hawtebrig," or the High bridge, now com.monly Horfe -bridge. The laft or loweft bridge on this river is in the parilh of Calftock, and was begun, according to Leland, by i"ir Piers Edgcombe. Five miles farther the Tamar receives the Tavy from the eaft, and having made a creek into the parifhes of Botesfieming and Landulph on the weft, becomes a fpacious hai-bour ; and after paffing near the ancient borough of Saltaffi, is joined by the Lynher creek and river. Increafing in import- ance as it winds along, it next forms, between Dock and Saltafli, the noble baiin called the " Hamoaze," or Ply- mouth Harbour, where a lai-ge proportion of the Britilh navy rides in complete fecurity. Having made two large creeks, one called St. John's, the other Milbrook, on the weft, and Stonehoufe creek on the eaft, the Tamar, after a coiirfe of about 40 miles nearly fouth, falls into the fea, having mount Edgcumbe for its weftern, and the lands of Stone- houfe and St. Nicholas ifland for its eaftern boundary, and produces the noble road for ftiipping named Plymouth Sound. The Tamar is one of the moll confiderable rivers in the weft of England ; its banks are richly diverfified with rocks, woods, and meadows ; and the fcenery in various parts of its courfe is extremely interefting and beautiful. The views about the Cater-marther rocks, Taviftock-New- bridge, the Morwell rocks, Cotele and Pentilly, are pecu- liarly romantic, and can fcarcely be equalled by any other river in the weftern part of the kingdom. (See Plymouth Harbour.^ Lyfons's Magna Britannia, vol. iii. Cornwall. Beauties of England and Wales, vol. ii. Cornwall. By J. Britton and E.W. Brayley. Tamar, a town of Arabia, in the province of Hedsjas j 40 miles N.N.W. of Karac. Tamak Bay, a harbour in the ftraits of Magellan, E. of Cape Tamar.' TAMARA, in ylneient Geography, a river of Spain, which rofe in tlie mountains W. of Lucus Augufto, and difcharged itfelf into the fea to the W. of a fmall gulf, on the banks of which were Grandinirum and Acrse Seftianse. Mela calls this river Tanaris. The Tamarifci inhabited its banks. Tamara, a town of the ifle of Albion, affigned by Pto- lemy T A M T A M l.emy to the Damnouii or Dumnonii. Mr. Hortley thinks it was Saltafli ; but Mr. Camden and Mr. Baxti-r fiippofc it, more probably, to be Tamertoii, which flill retains its ancient name. Tama K A, in Geography, a town of Morocco, on the loaft of the Athintic ; 30 miles W. of Tanidant. — Alfo, a fea-port town on the N.W. coafl of the illand of Soco- tora, and refideiice of the king. Tamaba I/les, or //lands of Idols, a duller of iflands near the coait of Sierra Leone. N. lat. ^° 40'. TA^(ARA', in Botany, the Hindoo name of a very cele- brated plant. (See our article Cyaml'x, written by the late Rev. Mr. Wood.) The above name fhould feem to origi- nate from the Hebrew "IJ^H, Tamar, a Palm-tree, whence dates are called Tamara by the Spaniards ; and it may allude to the form of the feeds of the Cyamus, rcfembling dates ; or to their llmilar ufe as an oriental article of food. Tamar is alfo the Arabic name of the fame fruit. See Tamarindus. TAMARACA, Tamarica, or Itamaraca, in Geo- graphy, a diftrift of Brafil, in the jurifdittion of Fernam- buco. It has its name from an ifland on the coail, near the mouth of the river Tamaraca, which conllitutes the prin- cipal part of its diftrift, though the territory thereof ex- tends inland between 30 and 40 leagues, having Parayba on the north, Fernambnco on the fouth, the ocean on the eail, aiid imfubdued Indians on the weft. It was reckoned one of the moft ancient and flourilhing captainfhips in Bratil ; but Parayba and Fernainbuco have lince exceeded it. The ifland is parted from the main land by a very narrow chan- nel. It is fertile and pleafant enough ; producing large quantities of Brafil wood, cotton, cocoa-nuts, fugar, melons, citrons, &c. befides a good deal of timber for fuel and other purpofes. It is about nine miles in length, and three in breadth, and about Z2 in circuit. It has a commodious haven on the fouth fide, with fome good fprings and rivulets of frefh water. The entrance into the port is by a channel of between 15 and 16 feet water, commanded by a caftle, built on an eminence, and formerly taken by the Dutch : who alfo built Fort Orangj at the moutii of the channel, which was inacceffible, by reafon of the marfhes furrounding it ; fo that the veffels that failed dov/n from the illand were ex- pofed to it, and they had in fome meafure flopped all the avenues from the Portuguefe. This illand, and the terri- tory on the continent belonging to it, pay 3000 ducats to the governor of the captainfhip, and in it are reckoned to be about 22 fugar-mills. The French had formerly a can- ton or fettlement on this coail, ftill called from them " Porto dos Francefe ;" but the Portuguefe obliged them to eva- cuate it. The capital, called " Noftra Segnora de Con- ceizao," or " Da Tamaraca," ilands at the entrance into the river of the latter name ; and near it is a fmall callle with a redoubt, commanding the avenues ; and about four miles N. of the mouth of the river is the famous point de- nominated " Punta Pedro." Tamaraca, a river of Brafil, which runs into the At- lantic, S. lat. 7° 52'. TAMARIL, a town of Spain, in Catalonia, fituated about a mile from the fea-coaft ; z miles N.E. of Tar- ragona. TAMARINDUS, in Botany, the Tamarind-tree, is fo called from Taituir, which is Hebrew for a Palm-tree, (and likewife the Arabic appellation of its fruit, the Date,) com- bined with the Latin word Indus, Indian. The fonn of the pod, and its ufe as an article of food, may well have given rife to the name. (See Tamara'.) — Linn. Gen. 23. Schreb. 450. WiUd. Sp. PI. v. 3. 577. Mart. Miil. 12 Dift. Y. 4. Ait. Hort. Kew. v. 4. 134. .Tuff. 347. Lamarck Illuftr. t. 2y. Grertn. t. 146 Clafs and order, Triandria Monogynia, Linn. Monadlphia Tritmdria, Schreb. Willd. Nat. Ord. I.omentaccf, Linn. Leg>imino/ourciro be this plant, his deicrijition it not fufficient to determine. He fays the pitals are hnear. 5. T. mucronata. Pointed Tainari(l<. — Stamens eight or ten. Spikes lati-ral and terminal. Leaves (heathing, abrupt, pointed. BraCleas taper-pointed, lanceolate The fpeci- incns of till* very diltinct fpecies, in the Liuuxan herbarium, Wve T A M have no mark by wliich we cm afcertain its native country, though w- fufpoft tlicm to have been fent from the Eall Indies. The jointed appearance of the young branches, and the (heathing abrupt form of the leaves, approach thofe of T. arlkulata; but the leaves have mucli more elongated and tapering points, and every part is twice the fizc of that fpecics. T\\c foliage moreover is much lefs evidently dotted. Flowers large, feffile, with lanceolate, membranous-edged braBeas, whofe points are longer than the calyx, and very flender. Segments of the calyx elliptical, obtufe, flat. Petals obovate. Stamens eight or ten, we cannot be certain which is their general number. Capfules prifmatic, glau- cous, three-quarters of an inch long. Seed-dotvn long and feathery. 6. T. fongarica. Songarian Tamarifl<. "Pallas Nov. Aa. Petrop. v. lO. 374. t. 10. f. 4." Willd. n. 3.—" Sta- mens eight or ten. Flowers axillary, fomewhat fpiked. Leaves flefliy, obtufe, triangular." — Gathered by Pallas, in a fait foil, on the banks of the Songari. We know nothing of this fpecies but from Willdenow. The " triangular blunt leaves" indicate an effential difference from the lalh 7. T. germanica. German Tamarifl<;. Linn. Sp. PI. 387. Willd. n. 4. Ait. n. 2. Fl. Dan. t. 234. Mill. Ic. t. 262. f. 2. Pall. Rofs. V. I. p. 2. 73. t. 80. (Tamarifcus ger- manica ; Ger. Em. 1378. Lob. Ic. 218. Myrica ; Camer. Epit. 74. f. 2.) — Stamens ten, monadelphous. Cluiters terminal. Leaves linear-lanceolate, feffile, obtufe. — Native of fwamps in Germany, Siberia, Switzerland, and the mountains of Dauria and Caucafus. Common in our gar- dens, where it flowers in the open air from June to Sep- tember. Mr. Aiton fays, on Hakluyt's authority, that this was the fpecies introduced by archbilhop Grindall ; fee T. gallica. Gcrarde fpeaks of both as profpering well in the EngUfh gardens. The prefent is a more upright and ghu- consjljrub than the gallica, as well as larger in all its parts. Leaves feflile, imbricated, channelled, dotted, entirely point- lefs, not dilated at the bafe. Brafleas ovate, pointed, with membranous edges. Segments of the calyx ovato-lanceolate, likewife membranous at the fides. Petals obovate, flefh- coloured, not much longer than the calyx. Capfule glaucous, the fize and fliape of our T. mucronata. Seed-doivn long and finely feathery. Pallas figures what he conceives to be an annual herbaceous variety of this fpecies, of which, not having feen it, we do not feel ourfelves competent to give an opinion. Tamaiux, in Gardening, furniflies plants of the hardy, deciduous, tree and fhrub kinds, of which the fpecies that are cultivated are, the French tamaridc (T. gallica) ; and the German tamarifl-c (T. germanica). Though the firft in its native fituation grows to a tree of middling fize, in this climate it feldom rifes more than four- teen or fixteen feet high, fendmg out many flender branches, moll of which fpread out flat, and hang downward at their ends, being rather of a flirubby nature. It is prevalent in the fouth of France, and in other fouthern coimtries. But the fecond fpecies is rather a flirub than a tree, having feveral woody ftalks arifing from the fame root, which grow quite ereft, fending out many fide branches, which are alfo ereft. It is found in many parts of Germany, &c. Method of Culture — AH thefe plants may be increafed either by laying down their tender fhoots in autumn, or by planting cuttings in an eaft border, which will take root in a ftiort time, if they are fupphed with water in the fpring, before they begin to fhoot in dry weather ; but they (hould not be removed until the following autumn, at which time they may be either placed in a nurfery, to be trained up two or three years, or where they are defigned to remain, mulch- T A M ing their roots, and watering them according as the feafon requires, until they have taken root ; after which, the only- culture they wiU require is to prune off the ftraggling flioots, and keep the ground clear about them. The layer method is not only tedious, but unneceffary, as the cuttings grow readily, and the layers often will not ilrike at all. The cuttings fliould be of the lalt fummer's flioots, and a moiil border is mofl proper for them. In two years they will be good plants for the fhrubbery% and may be planted out in almofl any foil, though they like a light, moiit earth befl:, efpecially the latter fort, which grows na- turally in low watery fituations. Both thefe plants are of a rather haidy nature, and beau- tiful in their fohage and fine fpikes of flowers. They will fucceed in almoft any fort of foil and fituation. They are very ornamental in the fhrubbery borders, clumps, and other parts of grounds. The former fort has likewife been lately recommended as a beneficial plant for forming quick or living hedges with, in fuch fituations as are cxpofed much to the fea-air and blafts, as it has been found to ftand fuch expofures remarkably well, where not affefted by the winter trofts, of which it is ra- ther impatient. See Quick Hedges, and Tamarfsk- Plant. TAMARUS, in Ancient Geography, a river of the ifle of Albion, which ftill retains its ancient name, being called Tamar, from Tamara, a gentle river ; and its mouth is Plymouth haven. TAMASA, or Tamasi, in Hindoo Mythology, is a name given to the goddefs Parvati, in her black charafler ; the word meaning blacknefs or darknefs . The name of Tamas, or Tamafa, was given to a dark, gloomy, aftronomical cha- rafter, called Rahu, (fee that article,) and Ketu, the names feverally of the dragon's head and tail, or the afcending and defcending nodes of aftrologers. One of the fons of Pa- vaka, the Hindoo fire-king, is likewife named Tamafa. (See Pavaka.) Alfo one of thofe mythological, or hif- torical perfonages, called Menus, of whom fee under Menu. In the Sanfcrit tongue, the root tarn is prolific of derivations indicating properties of a dark, or gloomy, or malignant tendency. Tamasa, in Geography, a river of Afia, in Mingrelia, which difcharges itfelf into the Black fea. TAMASIDAVA, in Jncient Geography, a town fituated in the interior of Lower Moefia, at fome diftance from the river Hierafus. TAMASQUI, in Geography, a town of Mexico, in the province of Guafleca ; 36 miles W.S.W. of St. Yago de los Valles. TAMASSUS, in Ancient Geography, a town fituated in the interior of the ifle of Cyprus, W. of Ledra, on one of the flreams which formed the Pedaeus. TAMATAMQUE, or Villa de las Palmas, in Geogra- phy, a town of South America, in the kingdom of Gra- nada, on the river St. Martha ; 25 miles S. of TenerifFe. TAMATIA, in Ornithology, the name of a very flrange bird of the Brafils. It is a fpecies of Bucco in the Linnaean fyftem by Gmelin, and the fpotted-bellied barbut of Latham. Its head is very large ; its eyes large and black ; its beak is two fingers breadth long, and one broad, fliaped fome- what hke a duck's, but pointed at the end ; its upper chap is black, its under one yellow ; its legs are long, and the thighs in great part naked ; its toes are long ; its tail is very fhort ; its head is black, ,aid its back and wings of a plain duflcy brown ; its belly is of the fame brown, variegated with white. TAMATMA, T A M TAMATMA, in Geography, a town of Africa, in the kingdom of Bornou. TAMBA, a town of Africa, in the kingdom of Bcn- guela ; 165 miles E. of Benguela. — Alfo, a town of Hin- dooftan, in Vifiapour ; 20 miles S.W. of Sattarah. TAMBA-AWRA, or Tambaoura, a town of Africa, in the kingdom of Bambouk, liaving in its vicinity a gold- mine ; 108 miles S.E. of Gallam. N. lat. 13° 20'. W. long. 9° 25'. TAMBAC, or Tambaqua, a mixture of gold and copper, which the people of Siam hold more beautiful, and fet a greater value on, than gold itfelf. Some travellers fpeak of it as a metal found in its peculiar Klines ; but upon what authority we do not know. The abbe de Choify, in his Journal of Siam, doubts whether this may not be the eledrum, or amber of So- lonx)n. The ambafladors of Siam brought feveral works in tam- bac to Paris in the reign of Lewis XIV., but they were not found fo beautiful as was expefted. See TosrBAC and Gold- coloured Metal. TAMBACH, in Geography, a town of Germany, in the principality of Gotha ; 6 miles N.E. of Smalkalden. TAMBACUNDA, a town of Africa, in the country of Woolly ; 30 miles E.N.E. of Medina. — Alfo, a town of Africa, in the country of Neola ; 52 miles W. of Ba- niferile. TAMBERCHERRY, a town of Hindooftan ; 18 miles N.E. of Calicut. TAMBILLO, a town of Peru ; 56 miles N. of Oruro. TAMBO, a town of South America, in the province of Popayan ; 12 miles W. of Popayan. — Alfo, a town of Paraguay ; 250 miles E. of AfTumption. Tambo de Oeros, a town of Peru, in the diocefe of Cufco ; 136 miles W.N.W. of Cufco. TAMBONA, a town of Hindooftan, in the country of Travancore ; 40 miles N.E. of Travancore. TAMBOOKIES, a people of the colony of the Cape of Good Hope, fituated N.E. of the Kouflis, or the Kooffis, N. to the Orange river and tropic of Capricorn, are fup- pofed by Mr. Barrow to be of Arabian extraft, as they widely differ from the Hottentots and tlie Negroes, and are acquainted with the fmelting of iron, and fome other rude arts. He conceives that a belt of this race fpreads acrofs to the Atlantic. The Demaras on the Copper mountains are Kouflis ; and their country is fo barren and fandy, that they cannot keep cattle. The Orange river, called the Groot or Great river, feems to rife about S. lat. 30°. E. long. 28°, and paffes W. by N. till it f;Jls into the fea be- tween the Great and Little Nemakos. It has high catarafts and inundations like the Nile. On the fhores are carne- lians, calcedonies, agates, and variolites. See Orasge- River. TAMBOPALLA, a town of Peru, in the diocefe of Arequipa, at the mouth of the Nombre de Dios ; 48 miles S. of Arequipa. S. lat. 17^ 10'. TAMBOS, in Peruvian Antiqttlty, buildings placed at certain diftances, for the lodging of the princes of that country, in their travels through their dominions. See M. de la Condamine, in Mem. de I'Acad. de Berlin, torn. ii. p. 435 ; who tells us (p. 438.) that he faw feveral remains of thefe tambos, in his journey from Quito to Lima. TAMBOV, in Geography, a city of Ruffia, on the Tzna, capital of a government, and fee of a bifhop ; 228 miles S.E. of Mofcow. N. lat. 52° 48'. E. long. 41° 4'. TAMBOUR, in Jrditeaure, a term applied to the Vol. XXXV. T A M Corinthian and Compofite capitals, as bearing fome refcm- blance to a drum, which the French call tambour. Some choofe to call it the vafe, and others camtana, or the bell. Tambour is alfo ufed for a little box of timber work, covered with a ceiling, withinfide the porch of certain churches ; both to prevent the view of pcrfoiis pafling by, and to keep off the wind, &c. by means of folding-doors, &c. Tambour alfo denotes a round courfe of ftone, feveral of which form the fliaft of a column, not fo higli as a dia- meter. Tambour, in the Arts, is a fpecies of embroidery. Tlie tambour is an inftrument of a fphcrical foi-m, upon whicli is ftrctched, by means of a ftring and buckle, or otiier fuitable appendage, a piece of linen or thin filken Huff; which is wrought, with a needle of a particular form, and by means of filken or gold and filver threads, into leaves, flowers, or other figures. Tambour, Fr., a drum ; which fee. Tambour de Bafque, a fmall drum ufed by the Bifcayans as an accompaniment to the flageolet, or oftave flute : a tabor and pipe. TAMBOURIN, a French dance, much in favour for- merly on the French ftage in all the opera dances of Lulli and Rameau. The air is gay and in common time. TAMBOURISSA, or TAMnouRtxissA, in Botany, Sonnerat's name for what is now called Mithridatea ; fee that article. The French appellation of this tree, Bois Tam- bour, or Drum-tree, might be fuppofed to allude to the lightnefs and hollownefs of the wood, or to its ufe, were not this word evidently derived from the Madagafcar name of the fame tree, Amlora. TAMBOVSKOE, \\\ Geography, a government of Ruf- fia, bounded on the north by the government of Vladimir, on the eaft by the governments of Nizegorod, Penza, and Saratov ; on the fouth by the government of Saratov ; and on the weft by the governments of Riazan and Voronez ; about 200 miles in length, and from 80 to 100 in breadth. N. lat. 51° 36' to 55^ 20'. E. long. 38* 30' to 48°. TAMBRAX, in Ancient Geography, a town of Afia, in Hyrcania, which, according ta Polybius, was large, and had a royal palace. TAMBRAY, in Geography, a town of Hindooflan, in Travancore ; 60 miles N.N.W. of Anjenga. TAMBRO, a river of Spain, which runs into the At- lantic, near Muros, in Galicia. TAMBUCO, or Tabuco, a town on the eaft coaft of the ifland of Celebes, fituated in a bay to which it givci name. S. lat. 2° 50'. TAME, a river of England, which rifes near Winflow, in the county of Buckingham, and runs into the Thames at Dorchefter, in Oxfordftiire Alfo, a river of England, which rifes near Dudley, in the county of Staflbrd, and runs into the Trent, about 7 miles above Burton. Tamk. See Thame. TAMEGA, a river of Portugal, which runs into the Duero, 10 miles S. of Am.-irante. TAMEG AN, a town of the ifland of Ceylon ; 48 miles S. of Candi. TAMERLANE, in Biography. Sec TiMOUR. TAMETAVE, in Geography, a town on the E. coaft of Madagafcar. S. lat. 18^ 5'. E. long. 49° 41'. TAMIA, in Ancient Geography, a town of the ifle of Albion, in the vicinity of Banatia and Alata Caftra. Pto- lemy alfiirns it to the Vacomagi. f TAMI- T A M TAMIAGUA, in Geography, a river of Mexico, which joins the Tufpa at its mouth Alfo, a town of Mexico, in the province of Guafteca. TAMIEH, a town of Egypt, on a canal which forms a communication between the Nile and the Birket el Kerum ; 12 miles N.E. of Fayonm. TAMINIZ, a river of Carniola, about four miles in extent ; 4 miles S.E. of Veit. It has no vifiblc communi- cation with any other river. TAMINO, a river of Switzerland, virhich runs into the Rhine, 2 miles S. of Sargans. TAMISRA, denoting darknefs, a name of one of the hells of the Hindoos, of which they had upwards of a fcore. Another of the Hindoo hells is named Andha Taniifra, meaning utter darknefs ; and as thcfe purgatories are dif- ferently placed, this is fuppofed to be the one fituated in the bowels of the earth, and its degree of puiiiftiment an ag- gravation of the eaficr penalties inflifted in Tamifra. In the Inllitutes of Menu it is ordained, that " a twice-born man, who barely aflaults a Brahman with an intention to hurt him, (hall be whirled about for a century in the hell called Ta- mifra." (Ch. iv. v. 165.) By " a twice-born man" is meant an individual of one of the three firft tribes or feA.KK.-Bed, Hor-Bed, Moj-Hoiife, and Stove. Tan, Floiver of, is a name given by the people employed in the tanning-trade, to a yellow fubftance, often found upon old tan, or oak-bark broken to pieces, which has been ufed HS tan, and is of no farther fervice. The name, however, is very improper ; and though every body converfant in tan-yards muft have feen the thing, yet :t has always pafTed as an efflorefcence of the bark, till the curious Mr. Marchand inquired more accurately into its na- ture, and found it to be a plant of itfelf, wholly different from the matter of the tan ; and to which the bark, which had been often wetted and dried again, ferved as a proper matrix. He found it to be more nearly allied to the fpunge, than to any other genus of plants, and therefore named it fpongia fugax mollis Jlava £5* amana in pidvere coriario najcens, ioft, beautiful, yellow-fading fpunge, growing on tanners' jbark. It makes its appearance motl frequently in the furamer- TAN months, and is then feen in fmall tufts of a beautiful yellow colour, on different parts of the old heaps of bark. It ap- pears at firil in form of a thin yellow fcum, and is of a fort of jelly-like ftrufture ; but it every day grows larger and thicker, till it ftands above half an inch out from the furfacc of the bark. As it grows, its fnrface becomes more and more cavernous and fpnngy, the pores or holes being of dif- ferent diameters, and the nitcrilicial matter forming a fort of net -work more or lefs regular, and often interrupted by ir- regular prominences in feveral parts ; and, in fine, when tlje growth is complete, tlie whole more refembles a fpunge than any vegetable fubftance, and is of a deep yellow co- lour, and confiderably thick and tough confiilence ; there are no roots to be difeovered ift'uing from it ; its fmcll is like that of rotten wood, and its taftc is fomewhat ftyptic. It always appears in tlie warm months, and always upon fuch old tan as has begun to ferment, and is in the ftatc in which our gardeners ule it for hot-beds. If it happens to ftand expofed to the fouth fun, it is but of (liort duration ; but if it be in a Iheltered place, it will lall a confiderable time, and often fpread itfelf to a great extent, and make a very beautiful figure for many weeks. Mem. Acad. Par. 'Xxs-Bed, in Gardening. See Bakk-^iW. Tan-P/V. See Baiik-P/V. T^A^-Spud, in Rural Economy, the name ufually given to a particular fort of tool ufed for peeling of the bark from oak, and fome other trees, in certain dilirifts ; but in others they employ feveral different implements for effctling this purpofe. TAs-Stove. See Hor-Hoii/e and Stove. TANA, in Geography, the moft confiderable river in Finmark. TANACETUM, in Botany, Tanfy, a barbarous Latin word, of which, like Ofmunda, it is fcarcely poffible, as Linnasus remarks, Phil. Bot. 160, to determine the mean- ing, or from what language it is derived. Of OsMUNDA we have attempted an explanation. ( See that article. ) De Theis cites Linn;eus and Dodonxus as deducing Tanacetum from Athanajia ; but we find no fuch etymology given by them, though feveral writers fpeak of thefe words as fy- nonimous, and fome lexicographers give that explanation. ASxvKTia, as exprefBng an unfading, or everlafting, flower, is little applicable to our Tanfy. — Linn. Gen. 417. Schrcb. 549. Willd. Sp. PI. v. 3. 1809. Mart. Mill. Dift. v. 4. Sm. Fl. Brit. 862. Prodr. Fl. Graec. Sibth. v. 2. 167. Ait. Hort. Kevv. v. 5. 1. Purlh 522. Jud". 184. Toum. t. 261. Lamarck Illuftr. t. 696. Gsrtn. t. 165 — Clafs and order, Syngenejia Polygamia-fuperjlua. Nat. Ord. Cum- pofiliZ difcoidex, Linn. Coryndifer two feet high, leafy, dark green, with a (Iroiig b.nl. fannc icent, and bitter talle. It was formerly more ufed than at prefent to give a flavour, as well as a green colour, to a rich knid of pudding. The lea-ves are copious, felfile, a fpaii long, fometimes a little hairy underneath ; clafping the Item with tlicir dilated bafe. Flowers compoCwg a large, flattifli, terminal, golden corymbus. The raJiiij is fcarcely remark- able but in hot fcafons, though its rudiments may' generally be detefted. The curled-leaved variety is efteemed moll aromatic and wholefome. Willdenow's fiftcentii fpecies, T. monanlbot, Linn. Mant. Ill, having a fcaly receptacle, is referred to Santolina, (fee that article,) in the Prodr. Fl. (kaeca, by the fpecific name of S. rigida. This is a deprell'ed annual jilant, with doubly-pinnatifid jjointlefs leaves ; fingle-flowered afcending hiury jalis ; and a hairy calyx, whofe fcales are nearly equal. T\Kj!owcrs arc yellow. This is a native of Cyprus, and very nearly akin to S. anthemoides, Linn. Sp. PI. 1 1 80 ; whofe calyx is imbricated on all iides, and its leaves have briftle-pointed fegments. Tanacetum, in Gardening, furnifltcs plants of the her- baceous and fhrubby perennial kinds, among which the fpecies mod: commonly cultivated are, the common tanfy (T. vulgare) ; the annual tanfy (T. annuum) ; the coft- mary tanfy (T. balfamita) ; the Siberian tanfy (T. fibiri- cum) ; the flirubbv tanfy (T. fufl"ruticofum) ; and the fan- leaved twify (T. flabelliforme). Ill the firit fort there are varieties with curled leaves, called double tanfy ; with variegated leaves ; and with larger leaves, which have little fcent. Method of Culnire — All the different herbaceous fpecies are increafed by parting the roots, and by feed. In the firll mode the bufinefs is effefted by flipping or di- viding the roots in autumn or winter, wlien the ftalks are decayed ; or early in fpring, before new ftalks (hoot forth ; planting the flips at once where they are to remain ; thofe for the kitchen-garden, as the common tanfy, &c. in anv bed or border a foot and a half afunder ; and thofe intended for va- riety in the pleafure-ground, fingly here and there, at fuitable diitances, to elfeCl a proper diverfity. The feed faved in autumn fhonld be fown in the fpriner following, in beds of light earth, broad-call and raked in, when the plants will foon come up, and in July be fit to prick out in beds, in rows a foot afunder ; fome to remain, and others to be planted out in autumn where they are to grow. All the fhrubby forts are callly increafed by cuttings of the branches, which Ihould be planted any time in fpring and fummer, choofing the yoimg and moft robufl fhootf, which fhould be cut off in proper lengths, and if early in fpring, &c. be planted in pots of good earth, feve« ral in each, plunging them in a hot-bed, where they will be rooted, and fit for potting off feparatcly in fix weeks ; or if in fummer, the young flioots may be planted in the full ground, in a fhady border, or where they may be fhaJed v.'ith mats from the fun ; or in ])ots, ajid placed ni the fliadc, or under a garden-frame, &c.: in all of which methods, giving plenty of water, they will readily take root ; but thofe in the hot -bed will be fonvardell : they, iiowever, will all be well rooted the lame feafon, and Ihould then be trani- planted into feparate pots, and managed as other fhrubby greenhoufe plants. See Gkef.n-hoUsk Plants. Moft of the former forts require to be afterwards kept free from weeds, culling down the decayed ftalks annually in autumn ; and as the roots increafe fafViato large bunches, fprcadjug rden oc- tlie and TAN fpreadinff widely round, they (hould be cut in, or be flipped occafionally, otherwnfe they are apt to overrun the ground ; and to have the ground dug between the plants annually. All the latter forts are fomewhat tender, but only re- quire (belter from froft, being kept in pots, and deporited among the grcenhoufe plants, and treated as other (hrubby exotics of that collection. They effeft a very agreeable variety at all times of the year, but particularly m fummer and autumn, when in flower. The common tanfy has been long cultivated in the gan as a culinary and medicinal herb ; the leaves bemg ufed cafionally while young and tender, in fallads during fprini' feafon, as well as for making cakes, puddings, many other (imilar articles. The powder of the dried leaves, the feeds, and the flowers, have alfo been fometimes employed as a remedy againft worms. . . The curled and variegated forts or varieties are pnncipaUy made ufe of for ornamental purpofes. The earl of Dundonald has propofed the cultivation ot the tanacetum, or tanfy, for the produftion of potafs, averting that it will yield more of this alkah than can be procured from an equal weiglit of any other vegetable. Tasacetum, in the Materia Maiica. See Tansy. TANADASSA, in Jncienl Geo^rap/jy, a town oi Africa Propria, on the route from the Grand Leptis to Tacapae. TANjECIUM, in Botany, fo named by Dr. Swartz, on account of its very long climbing ftem and branches, from TX.MKW, Jl retched out, or rather having an elongated point. —Swartz Prodr. 91. Ind. Occ. 1049. t. zo. Schreb. Gen. 412. 834. Willd. Sp. PI. v. 3. 312. Mart. Mill. Dirt. V. 4. Clafs and order, Didynamia Angiofpermia. Nat. Ord. Lurtdt, or perhaps Putaminea, Linn. Swartz. Akin to Solanaceit, Ju(r. Gen. Ch. Ca!. Perianth inferior, of one leaf, tubular, undivided, abrupt, nearly or quite entire. Cor. of one petal, long ; tube cylindrical, dilated upwards, limb fpread- ing, in five, fomewhat unequal, or two-lipped, deep feg- ments. Stam. Filaments four, Iborter than the tube of the corolla, two of them rather (horter than the reft, with an intermediate rudiment of a fifth ; anthers two-lobed. Pijl. Germen fupcrior, roundifti, feated on an annular receptacle ; ftyle fimple, about the length of the ftamens ; ftigma of two thick fpreading lobes. Peric. Berry very large, globofe or oblong, on a (hort ftalk, of two cells, with a hard coat. Seeds fmall, numerous, oblong, angular, inferted into a central globofe receptacle. EfT. Ch. Calyx cylindrical, undivided, abrupt. Corolla tubular, rather unequal, five-cleft. Rudiment of a fiftli ftamen. Berry coated, of two cells, with many feeds. Obf. This genus furely belongs to the Lurida: of Lln- nxus, and is confiderably akin to another genus of Swart/.'s, the SoLASDRA, fee that article, though he does not appear to advert to this affinity. I. T- parajilicum. Simple -leaved Tancecium. Willd. n. I. Swartz Ind. Occ. 1053. Jacq. Hort. Schoenbr. V. I. 61. t. 1 15 Leaves fimple, ovate, coriaceous. Stem fhrubby, climbing parafitically. — Native of woods ffi the weftern part of Jamaica. Stem when young clofcly at- tached by fibrous radicles to the trunks of trees, round, with a grey rugged bark ; when full-grown, it often de- cays below, fupporting itfelf altogether parafitically, and fending out round, fpreading, fmooth, leafy branches. Leaves oppofite, on ihort thick ftalks, five or fix inches long, entire, acute, fcaicely pointed, fmooth, of a fine (hining green, with one rib, and many oblique veins. plovitr-fialh axillary, (hort, each bearing about four elegant TAN drooping Jlowers, about an inch and a half long. Calyx fwelling, purpli(h-red, contrafted at the mouth, quite en- tire. Corolla with a pale yellowidi tube, and crimfon, fpreading or reflexed, border, whofe fegments are rounded, and nearly uniform, the lowermoft only a little the largeft, and folding over the mouth like a Ud, before the flower ex- pands. Berry globofe, as big as a fmall apple, with a brown brittle coat. Swartz once found a fruit with three cells. 2. T. Jaroba. Three-leaved Tanxcium. Willd. n. 2. Swartz Ind. Occ. 1050. t. 20. f. I. (Jaroba; Marcgr. Brafil. 25. Pis. Biafil. 173. Cucurbitifera fruticofa tri- folia fcandens ; Sloane Jam. v. 2. 175.) — Lower leaves ter- nate ; upper in pairs, with an intermediate terminal tendril. Stem climbing. — Native of woods, on the banks of rivers, in the weftern part of Jamaica. Swartz found it in flower in February, climbing to the top of a tree of the Bignonia leucoxyhn. The fhrubby Jlem mounts to a great height, where it has an opportunity of fupport, fending out long, pendulous, round, flightly ftriated, herbaceous branches. Leaves oppolite, ftalked ; the lower ones with three ovate, pointed, entire, ribbed, fmooth, fcarcely coriaceous, leaflets, each half a foot long ; upper of two rather fmaller ones, with a flender rigid tendril in tlie place of a third leaflet, by which tile branches are fupported on thofe of neighbouring trees. Clujlers axillary, of few flowers, with thick, round, oppofite ftalks. Flowers white, fhort -lived. Calyx gibbous at the bafe ; fometimes very minutely five-toothed at the margin. Corolla funnel-fliaped ; its tube fix or feven inches long, fwelling at the top, downy both within and without ; fegments of the limb ovate, wavy or plaited, about three- quarters of an inch in length, all nearly equal, though the two uppermoft arc, as in the former fpecies, lefs deeply fe- parated. Berry verj^ large, a foot long, oval, pendulous, fmooth, brittle when ripe. Seeds large, broad, compreffed, lying clofely over each other. The Portuguefe call this plant Cafca amargofa, on account of its bitteniefs. 3. T.? pinnatum. Pinnate Tanxcium. Willd. n. 3, (Crefcentia pinnata ; Jacq. Coll. v. 3. 203. t. 18.) — Leaves pinnate. Stem arboreous, ereft Native of Mozambique, where it is called Kigelikeia, and from whence it was carried to the ifles of Mauritius or Bourbon, and thus got into the imperial gardens at Schoeubrun, being accompanied by a dif- fefted drawing of the jloiver, which is all that Jacquin has exhibited of the plant. The young tree, about feven feet high, and four inches in the diameter of its trunk, bore in the ftove feveral branches, ■vn'Cd alternate pinnate leaves, each of four pair of oblong leaflets with an odd one, all coria- ceous, obtufe with a point, undulated, fparingly and (harply ferrated ; fmooth above ; roughifti to the touch beneath ; the largeft near fix inches long ; the odd one on a confider- able partial ftalk. The Jlowers are faid to grow on the trunk and older branches, but of their mode of infertion or inflorefcence we have no account. The calyx is ovate, tu- bular, fmooth, palcifh-green, about an inch long, with five acute, rather deep, red fegments. Tube of the corolla cy- lindrical, pale, the length of the calyx ; limb very large, bell-(haped, three inches long, with five acute, unequal, re- flexed, marginal lobes ; its outfide ftrongly and copioufly ribbed, pale, with a tinge of red ; the whole infide of a fine crimfon. The fifth Jlamen is apparently perfeft, with an anther, though but half the length of the others ; all the filaments hairy. Germen accompanied at the bafe by five glands. Stigma of two lanceolate plates. Berry as large as a man's head, coated, full of pulp, in which the feeds are lodged. — Jacquin was doubtful of the genus of this magni- ficent TAN Scent and curious plant, which is faid to form, in its native country, a very large tree. There fecms as much reafon to refer it to Crefcentla as to Tamcium, the calyx not anfwering well to either, and the internal ftrufture of the fruit being unknown. TANAEIM, or TenAIBM, in Geoxraphy, a town of Arabia, in the province of Yemen, famous among the Arabian Jews, who had anciently their chief leat, and many confiderable fynagogues in it ; at prefent it is almoft defo- late ; 30 miles S.E. of Sana. TANAGA, one of the Fox idands, in the North Pacific ocean, about 40 miles in circumference. N. lat. 53° 20'. E. long. 182° 14'. TANAGER, 11 Jiume Negro, in Ancient Geography, a river of Italy, in Lucania, according to Virgil. It has its Source in a mountain called Albufnus, now monte Poftig- lione, and difcharges itfelf into tlie Silanus. TANAGRA, a confiderable town of Bccotia, towards the weft, feated on an eminence, at fome diftance from the mouth of the Afopns. In a temple of Bacchus at this town was a fine ftatue of this god, and above, a triton of ad- mirable workmanfhip. Befides the temple of Bacchus, here were temples of Themis, Venus, Apollo, and Mercury. In the moft confpicuous place of this city was the tomb of Corinna, fo famous for her beauty and poetical talents, fo that at Thebes fte gained a prize in preference of Pindar. Here was alfo the tomb of Orion. Paufanias. Tanagra, Tanager, in Ornithology, a genus of the order Pafferes ; the characters of which are, that the bill is conic, .icuminated, emarginated, fubtrigonous at the bafe, and in- clining at the apex. Gmehn enumerates forty-fix Species. Jacapa. Black ; the forehead, neck, and breaft, crim- fon-coloured. This is the jacapu of Maixgrave, the red- breafted blackbird of Edwards, and the red-breafted tanager of Latham. It is found in America. Brasilia. Crimfon, with black tail and wings. This is the cardinal of Buffon, and the Brafilian tanager of La- tham. Found in South America. Of this bird there are two varieties, one of which is the rumplefs blue, red, and black Indian fparrow of Willughby. Rubra. Red, with black wings and tail, and tail- feathers white at the apex. This is the Canada tanager of Pennant, and the red tanager of Latham. Found in Canada. Of this the fcarlet fparrow of Edwards, or merula brafilienfis of Ray and Willughby, is a variety. Jacarina. Violet-black, with wings whitirti beneath, and tail of two divaricated branches. This is a bird of Brafil and Guiana, the jacarini of Marcgrave. Violacea. Violet, and the under part very yellow : the teitei of Marcgrave, the golden titmoufe of Edwards, and golden tanager of Latham. A variety of this, found in Brafil, Surinam, and Cayenne, is (hining black, with the ab- domen, breaft, and front pale yellow, and the outer tail- feather having on its inner fide a white fpot. Olivacea. Ohve ; the throat and breaft yellow, the abdomen wliite, the quills and tail-feathers brown, with a white margin. This is the olivet of Buffon, and found in Cayenne. Gyrola. Green, red-headed, yellow collar, and ceru- leous breaft ; the rouvardin of Buffon, the red-headed green- finch of Edwards, and red-headed tanager of Lathani. Found in various parts of South America. Cayana. Yellow, green back, red cap, and black cheeks. A bird of Cayenne, of which there is a variety, Vol, XXXV. T A N underneath golden-coloured, back green and yellow, head ceruleous, wings and tail green. Atrata. Siiining black : the black tanager of Latham. Found in India. MiiXiCANA. Black, underncatli yelluwini, breaft and rump bhieifh : the black and blue titmoufe of Edwards, and black and blue tanager of Latham. The tangara bar- badenfis ccruk-.i of Briffon is a variety. Found in Cayenne, Guiana, and New Spain. Tatao. Violet, black back, yellow rump, green head, and violet breaft and wings: the titmoufe of paradife of Edwards, the paradife tanager of L.itham, and the tang;u-a of Brift'on, Ray, Willughby, and Buffon. Found in Guiana. Ai.bikosthis. Black, with a fpot on the wings, and tail yellow, and a wliite beak : the wliite-billed tanager of Latham. Of this there is a variety. It is an American bird. Gfi.AKis. Black, beneath white, red head, and purple throat : the rouge-cap of Buffon, and red-headed tanager of Latham. Found in Cayenne and Gui;uia. Cayenxekms. Black, both fides of the breaft and under part of the wings yellow. Found in Brafil, Guiana, and New Spain. Bhasiliensis. Black, under part white, tliroat and rump blueifli, face and breaft black : the guira-genoia of Marc- grave, the turquin of Buffon, and turquoife tanagiT of Latham. A Brafil fpecies. Dominica. BLick-fpotted, above, brown, and below whitifti : called from the place of its refidence, by Latham, the St. Domingo tanager. M1LITARI.S. Brown ; breaft, neck, throat, and ftioul- ders fanguineous : the military tanager of Latham, and greater bulfinch of Edwards. Found in South America. Grisea. Grey-olive, under grey, with wings and tail black, grey at their margin. Found in Guiana and Loui- fiana. Ei'iscopus. Cinereous, with wings and tail externally blueilh : the biftiop tanager of Latham. Found in Cayenne. Sayaca. Hoary, with blueifti wings : the fayacu of Marcgrave. Found rarely in Cayenne. Punctata. Green, pointed with black ; under yel- lowidi-whitiftl : the fyacoa of Buffon, fpotted green titmoufe of Edwards, and fpotted tanager of Latham. Found in Cayenne. ViiiENS. Green, under yellowifti, cheeks and throat black : the green tanager of Latham. Found in New Spain, Peru, ajid Brafil. MississiPENsis. Wholly red : the Miffiffippi tanagor of Latham. Of this fpecies there arc two varieties ; one found on the river Miffiffippi, and the other in New Spain. Cristata. Blackilh, golden creft, throat and rump yellow : the houppette of Buffon, and crefted tanager of Latham. Found in Guiana. jEstiva. Red, bill yellowilh : the fummer red-bird of Catefby and Edwards, and fummer tanager of Pennant and Latham. Found in Carolina and Virginia. Magva. Olive-brown ; under rcddifti ; legs, front, and temples blueifti ; vent-featliers and tliroat red, and the middle of the throat white : the grand tanager of Latham. Found in Guiana and Cayenne. CvERULEA. Blueifti, black bill, and light-red legs : the blue tanager of Latham. A Cayenne bird. Variabili';. Green, partly blueifti and partly brown, black band about the eye, quills and tail-feathers black, with green margins : variable tanager of Latham. K Tricolor. TAN Tricolor. Green ; head, chin, throat, and breaft pal? fca-colour ; black neck-band, head and fides of the neck golden-green, a large fpot on the throat, and back black, the brcatl-band blucifh, the abdomen and vent-feathers yel- lowifli-green : the green-headed tanager of Latham. Of this there is a variety. GilANENsis. Green, head cinereous-grey, front and head-band on both fides from the front to the nape red : the grey-headed tanager of Latham. Found rarely in the forefts of Guiana. NiOKicoLi.is. Ohve, beneath yellow, black throat, golden bread, feathers of the wings and tail-feathers brown, with ohvaceoiis margins : the black-throated tanager. Found in Guiana. Ri-FicoLLis. Black and blue, with a large red ftreak on the throat, and black wings and tail : the rufous-throated tanager of Latham. Found in Jamaica. LiiLCOCEPHALA. Black and brown, white front, reddifli throat, purple breaft and wings, and yellowifli abdomen and tent-feathers : the quatoztli of Seba. Found in the moun- tains of Brafil. Flava. Yellow throat, breaft and fpots of the abdomen black, quills and tail-feathers black, fea-coloured at the margin. This is the guiraperea of Ray and Willughby, ind the yellow tanager of Latham, Found in Brafil, of the fize of a lark. Amboinensis. Varied with black and blue, black vertex, blucifti-green rump ; cheeks, chin, throat, and breaft blueifti ; abdomen and vent -feathers white. Found in Amboina, and called calatti. Canora. Blueifti, varied with yellow ; black tail, white at the apex ; and wings partly blueifti and partly yellow : the xiuhtototlof Fernandes. Found in New Spain. Sinensis. Olivaceous, beneath yellow, with the quills and tail-feathers black, yeOow at their margin : the Cliinefe tanager of Latham. BoNARiENsis. Black and violet, with a flight greenifti tint in the wings and tail : the violet tanager of Latham. Atra. Cinereous, with the face, chin, and throat black, (thofe of the female yellow:) the camail or cravatte of BufFon, and black-faced tanager of Latham. Found in Guiana. PiLEATA. Blueifti -cinereous, beneath filvei-y, with the vertex, temples, and fides of the neck black, and the ocular fpot white ; the hooded tanager of Latham. Of this the tijepiranga of Ray and Willughby is a variety. Found in Guiana and Brafil. Melanictera. Above ferruginous, beneath very yel- low, head and nape black, wings ftreaked with white, and tail brown : the black-crowned tanager of Latham. Found on the Caucafus and in Georgia. SiBiRiCA. Black, the tips of the down between the {houlders and the rump ciliated with white. A Siberian fpecies. Atricapili.a. Reddifti and rufous ; head, tail, and wings ftiining black, with a roundifti tail : the mordore of Buffon, and black-headed tanager of Latham. Found in Guiana. Striata. Beneath yellow, with a head ftriated with black and blue, back above blackifli and beneath golden, quills and tail-feathers black, with a blue margin : the onglet of Buffon, and furrow-clawed tanager of Latham. Found in South America. NiGERRiMA. Black, with a white fpot within the wings : the Guiana tanager of Latham. Capensis. Above ferruginous-brown, beneath ferru- TAN ginous, Taried with white ; the middle of the tail black, its fides ferruginous-nifefcent, the bill yellowifti, the legs black. Found at the Cape of Good Hope. TANAH, in Geography. See San. TANAIS, the Don, in Auclent Geography, a large river which had its rile towards tlie eaft, in the territory of the Thyrfagetes, traverfed the country of the Sarmatians, turned its courfe to the fouth, and difcharged itfelf in the lake of Maeotis. Its courfe was fo rapid, that it never froze. Its borders were inhabited by the Sarmatians. The two mouths of the Tanais were diftant 70 ftadia from one another, according to Strabo. — Alfo, a town of European Sarmatia, fituated between the mouths of the river of the fame name. — Alfo, a river of Africa, which ran into the Mediterranean, towards the fouth-weft, at five miles from Thena. Tanais, in Mythology, a divinity peculiar to the Arme- nians, to whom were confecrated the flaves of both fexes ; and it is alfo faid, that the people of better rank offered to him their daughters, who, as foon as they were confecrated to this god, were authorifed by the law to proftitute themfelves to the firft comer, until the time of their mai-riage. Nor did this conduft by any means prevent the addrefles of fuitors. TANAK Point, in Geography, a cape on the north coaft of Java. S. lat. 6° 24'." E. long. 108^ 36'. TANAKAKA, a fmall ifland near the fouth-weft coaft of Celebes, belonging to the Dutch. S. lat. 5° 30'. E. long. 119° 42'. TANALITZKAIA, a fortrefs of Ruffia, in the go- vernment of Upha, at the conflux of the Urdafim and Ural ; 120 miles E. of Orenburg. TANAMBE, a town on the eaft coaft of Madagafcar. S. lat. 16° 20'. E. long. 50° 20'. TANAON, a town on the eaft coaft of the ifland of Leyta. N. lat. 11^ 10'. E. long. 125° l'. TANAOSIMA, one of the Japanefe iflands, about 100 miles in circumference. N. lat 30° 20'. E. long. 132° 30'. TANARGUE, a mountain of France, which gives name to a diftrift in the department of the Ardeche ; 20 miles S.W. of Privas. TANARO, one of the fix departments of Piedmont, after its union with the French republic, Auguft 26, i8oa, formerly Acqui and Afti, in N. lat. 44° 45', weft of Ma- rengo, containing 197 fquare leagues, and 311,458 in- habitants. It was divided into three circles, wz. Afti, including 131,910; Acqui, 82,914; and Alba, 96,634 in- habitants. The foil is broken by torrents, which form many lakes and marfties. The fouth-weft diftrift confifts of barren fpots and fruitful vallies ; the northern part is fertile, and the hills yield abundance of wine of an inferior quality. The principal produfts of the department 3tre grain, fruits, and paftures, with quarries of ftone, mineral fprings, &c. Tanaro, a river of France, which rifes in the mountains near Tenda, paffes by Coni, Cherafco, Alba, Afti, Alex- andria, &c. and joins the Po, 3 miles E. of Valenza. TANARUS, the Tanaro, in Ancient Geography, a river of Italy, in Liguria, which having been formed by the con- fluence of many rivers, difcharged itfelf into the Padus, north-weft of Dertona. TANASSERIM, in Geography. See Si AM. TANAVELLE, a town of France, in the department of the Cantal ; 4 miles W.S.W. of St. Flour. TANAW, a town of Napaul ; 45 miles S.W. of Catmandu. TANBAY, coaft of the ifland of of of TAN ^ANBAY, a town on the E. Negros. N. lat. lo'^ 3'. E. long. 123° 1'. TANCACA, a town of Mexico, in the provnice Guaileca ; 50 miles W.S.W. of St. Yago de los Valles. TANCALE, a town of Mexico, in the province Guafteca ; 50 miles N.W. of St. Yago de los Valles. TANCANCHY, a town of Hindoollan, in Madura ; 8 miles S. of Vadagary. TANCARVILLE, a town of France, in the depart- ment of the Lower Seine; 10 miles S.E. of Montevilliers. TANCHOY, a town of Mexico, in the province of Guafteca ; 35 miles N. of Panuco. TANCICUY, a town of Mexico, in the province of Guafteca ; 15 miles S.W. of Panuco. TANCOA, a town of Abyffinia ; 40 miles N.N.E. of Mine. TANCOBANCA, a river of Perfia, which runs into the fea, 69 miles W.N.W. of Port Jaques. TANCOS, a town of Portugal, in Eftremadura, at the conflux of the Zezare and the Tagus ; 2 1 miles N.E. of Santarem. TANCUYLABO, a town of Mexico, in the province of Guafteca ; 30 miles S.S.E. of St. Yago de los Valles. TANCYTOWN, a poft-town of Maryland ; 27 miles N.E. of Frederickftown. TANDA, a town on the eaft coaft of the ifland of Min- danao. N. lat. 8° 48'. E. long. 126° 12'. Tanda, or Tanrah, a town of Hindooftan, called fome- times Chatvafpour Tanda, from the original name of the diftriA in which it was fituated. It was a ftiort time, in the reign of Shere Shaw, about the year 1540, the capital of Bengal, and became the eftablifhed capital under Acbar, about 1580. It is fituated very near to the fcite of Gour, on the road leading from it to Rajemal. There is little remaining of this place, fave the rampart ; nor do we know for certain when it was deferted. In 1659 it was the capital of Bengal, when that fubah was reduced under Aurungzebe. TANDAH, a town of Bengal; 12 miles S.E. of Cal- cutta. TAND AM, a town of Bootan ; 57 miles N. of Dinage- pour. TANDAMORGONG,atovvnofHindooftan,inGoond- wanah ; 25 miles E. of Nagpour. TANDEGO, a town of Africa, on the St. Domingo river ; 25 miles E. of Farim. TANDERAGEE, a poft-town of the county of Ar- magh, Ireland, which has a good linen market. It is near the Nevnry canal, and 61 miles N. by W. from Dublin. TANDLA, a town of Hindooftan, in Malwa ; 72 miles W. of Ougein. N. lat. 23° 5'. E. long. 74° 30'. TANDOO Baas, a fniall ifland in the Sooloo Archi- pelago. N. lat. 5° 8'. E. long. 120° 15'. Tandoo Battoo, a fmaU ifland in the Sooloo Archipelago. N. lat. 5° 9'. E. long. 120° 12'. TANDORF, a town of Bohemia, in the circle of Koni- gingratz ; 20 miles E. of Konigingratz. TANE, a river of Finmark, which runs into the Frozen fea, N. lat. 70° 48'. Tane. See Taroataiiietoomo. TANG, in Geography, a town of Sweden, in Weft Goth- land ; 30 miles E.N.E. of Uddevalla. TANGA, in Commerce, a money of account at Goa, in the Eaft Indies ; fome of which are good, and others bad. A pardo is worth 4 good tangas or 5 bad ; 16 good vintins, or 20 bad, are equal to 300 good bafaruccos, or 360 bad. The coins are the St. Thomas, a gold piece of money of TAN nearly the weight of a ducat, which pafTes for 11 good tangas, more or lefs. The filver coins arc the pardo xera- pliin of 5 good tangas, and the common pardo of 4 good tangas. The copper and tin coins are the good and bad bafaruccos. Venetian fcquins are worth if) good taugas ; pagodas, 10 good tangas; and Spanifti dollars, 550 good bafaruccos, all more or lefs. A good tanga is worth about l\d ftcrhng ; a pardo, 2s. 6d. ; and a xeraphin, y. ^^J, fterling nearly. Kelly's Cambift. TANGALA, in Geography, a fmall ifland in the Eaft Indian fea, near tlie S. coaft of Java. S. lat. 8" 20'. E. long. 1 1 1° 45'. TANGALE, a town of the ifland of Ceylon ; 92 nvleg S. of Candy. TANGA R AC, in Botany, a poifonous Brafilian plant; but the root, fays Pifo, is an antidote to the leaves, flowers, and fruit. Boyle's Works, Abr. vol. i. p. 14. TANGA WA, in Geography, a town of Japan, in tbe ifland of Ximo ; 30 miles S.E. of Kokura. TANGE, a town of Sweden, in Weft Gothland ; 21 miles N. of Gotheburg. TANGEN, a town of Norway, in the province of Aggerhuus ; 2 miles E. of Stromfoe. TANGENE, a town of Sweden, in Weft Gothland ; 26 miles E. of Uddevalla. TANGENT, in Geometry, a right line which touches a circle, that is, meets it in fuch manner, as that, though infinitely produced, it would never cut the fame ; that is, never come within the circumference. Thus^theline AD {P/ate XV. Geometry, fg. 3.) is a Un- gent to the circle in D. It is demonftrated in geometry; i. That if a tangent, A D, and a fecant, A B, be both drawn from the Tan»e point, A ; the fquare of the tangent will be equal to the reftangle, under the whole fecant A B, and that portion of it, A C, which falls without the circle. 2. That if two tangents, AD, A E, be drawn to the fame circle from the fame point A, they will be equal to each other. As a right line is the tangent of a circle, when it touches the circle fo clofely, that no right line can be drawn through the point of contaft between it and the arc, or within the angle of contaft that is formed by them ; fo in general, when any right line touches any arc of a curve, in fuch a manner that no right line can be drawn through the point of contad, betwixt the right line and the arc, or within the angle of contaft tliat is formed by them, then is that Unctbe tangent of the curve at the faid point. I'he tangent of an arc is tlie right line that admits the pofition of all the fecants that can pafs through the point of contaft, though, ftriftly fpeaking, it is no lecant. MacL Flux. art. i8i. 505. Tangent, in Trigonometry. — u4 tangent of an arc is a right line, raifed perpendicularly on the extreme of the diameter, and continued to a point, where it is cut by a fecant, that is, by a line drawn from the centre through the extremity of the arc of which it is a tangent. A tangent oj an arc A {Plate II. Trigonom. fg. 'S-) is a part of a tangent of a circle (that is, of a right line, which touches a circle without cutting it), intercepted between two right lines drawn from tlie centre C, through the extremes of the arc E and A. Hence the tangent F E is perpendicular to the radius- EC. And hence the tangent F E is the tangent of the angle ACE, as alfo of that of A C 1 ; fo that two adjacent angkg have only the fame commoa tangent. ]i, 2 Tangbmt, TANGENT. Takges'T, Co, or Tjnj^ent ef the Complement, is the tan- «cnt of an arc, whicli is the complement of another arc to a quadrant. Thus a tangent of the arc A H, is the co-tangent of the arc A E, or the tangent of the complement of the arc A E. Tofnd the length of the tangent of any arc, the fine of the arc being given : fuppofe the arc A E, the given fine A D, and the tangent required E F. Since both the fine and tangent are perpendicular to the radius E C, they are parallel to each other. Wherefore as the cofine D C is to the fine A D, fo is the whole fine to the tangent E F. See Sike. Hence, a canon of fines being had, a canon of tangents is eafily conftruAed from it. Tangents, jirtificial, are the logarithms of the tangents of arcs. Tangents, Line of, is a line ufually placed on the feftor, and Guntcr's fcale ; the dcfcription and ufes of which, fee under Sector. Tangent of a Conic SeSion, as of a parabola, is a right line, which only touches or meets the curve in one point, and does not cut or enter within the curve. See Conic SeHioni. Tangents, Method of, is a method of drawing tangents to any algebraical curve, or of determining the magnitude of the tangent and fub-tangent, the equation to the curve being given. .' The method of tangents is nearly related to that of maxima et minima ; and the fame authors, who in the early ftate of algebra attempted one of thofe cafes, never failed of touching alfo on the other. Hence we have the methods of Def- cartes, Fermat, Roberval, Hudde, &c. We have already explained under the article Maxima et Minima, the feveral methods of thefe authors relating to the latter fubjeft ; and as their methods of tangents differ in no refpeft from this, we fhall not repeat them again in this place, but merely explain the principle which led to fo intimate a conneftion between the two problems. Defcartes' Method of Tangents It has been (hewn under the article above referred to, that Defcartes' method of maxima and minima, depended upon his making two roots of his equation equal to each other, and the fame principle led liim alfo to his problem of tangents. Let us conceive, for example, a curve A B i, ( Plate XIV. Analyft!, fig. l6. ) defcribed on an axis A C ; and from any point in this axis, C, as a centre, let there be defcribed a circle, which fhall cut the curve at leafl in two points, as B, b ; from thefe draw two ordinates, which will ncceffarily be common both to the circle and curve : let us now imagine the radius of this circle to decreafe, while its centre remains fixed ; and it is obvious that thus the two points of inter- feftion will approach each other, and finally coincide, in which cafe the circle will touch the curve at the point E, and the tangent at that point will be common to both, and perpendicular to the radius of the circle at that point. Thus the problem of determining the tangent to a curve, is reduced to finding the pofition of a perpendicular to the curve, drawn from any point in its axis. In order to effeA this, Defcartes fought, in a general manner, the points of ijiterfeftion in the curve made by a circle defcribed with a given radius from a given point in the axis. He thus ar- rived at an equation, which, in the cafe of two interfeftions, ought to contain two unequal roots, expreffing the diflance •f the two ordinates from the vertex of the curve. But when the two points of interfeftion are united in one, as in the cafe of the circle touching the curve, then the tvi'o roots of the equation are neceffarily equal to each other. His objed, therefore, was, in the equation firfl obtaineii, and of which the co-efficients were indeterminate, to values, that the two roots fhoiild be equal ; pofe, he compared the propofed equation w of the fame degree, having two equal roots ; equating the co-efficients, obtained the value firft equation. In order to illuflrate this, let A B i {fig. bola, and B 4 a circle. Make C A — a, radius C B = r, then CD =; a — k ; and nate B D belongs to the circle, we have give them fiicli tor which pur- ith an equation and hence, by of thofe in his 1 6.) be a para- A D = x, the fince the ordi- CD" = r'- (a- x)-= r'-a'-}- ;a.■l: — X . But the fame ordinate belonging alfo to the parabola, we have from the known property of that curve, y' = px,jf> being the parameter ; therefore r^ — a^ -(- 2a.x — .v' = p.x, or s,^ + (J>— 2a) X + {a^ — r') = o, which, being an equation of the fecond degree, mull necef- farily have two roots, or values, of x, anfwering to the two abfciffes AD, Ad: for we Ihould arrive at the fame con- clufion, if our equation had been deduced with reference to the point 6 ; and it is obvious that thefe roots depend entirely upon the relation of the co-efficients {/> — 2 a) and (a' — r"), or upon the ratio of the quantities a, p, and r, to each other ; and, confequently, fuch values may be given to thefe quantities, that the two values of x may be equal. In order to find this ratio, Defcartes formed an equation of the fecond degree, having two equal roots, as .\- ° — 2e s. -t- e^ =: o, TOz. \x — e) (x — e) =. o; and comparing this with that found above, he obtained the equation .v — a = CD = \p, which (hews that in the parabola, the fub- normal is equal to half the parameter ; whence it alfo fol- lows, that the fub-tangent is equal to double the abfcifs, which is the known property of the curve. Defcartes had alfo another method for tangents, a little different from the above in praftice, although it was th^ fame in principle ; thus he conceived a right line to revolve about a fixed point in the axis of the curve produced, which at firft fhould cut the curve in a certain number of points, but by its revolution, thefe points of interfeftion ap- proaching each other would finally coincide, and thus the revolving line become a tangent to the curve. For this purpofe he alfo firft obtained the general equation, which he afterwards equated with another having two equal roots, and thus determined the feveral relations of his indeterminate co-efficients, exaftly as in the cafe above given. Fermat' s Method of Tangents. — It will be found by com- paring the above method of tangents of Defcartes, with that of his maxima and minima, that the two ultimately de- pend upon the fame principle, vi%. of making two roots of an equation equal to each other ; and the coincidence of Fermat's methods for thefe two problems is ftill more ob- vious ; in faft, he fcarcely treats of them as diftinft cafes, but refers immediately for the folution of the cafe of tangents to that of his maxima and minima. In order, fays this author, that a line may be a tangent to a curve, as for ex- ample to the parabola A Bi, at the point h, {fig. 17.) it is evident that every ordinate, except B C, will meet that tangent beyond the curve, as in C. Thus the ratio of B C' : ce', which is the fame as C D' : cDSwill be lefsthan that of C B': c l>', or than that of C A to ir A ; but if we fuppofe thefe ratios to be the fame, and confequently the diftance f C to vanifh, the points B, i, will coincide, and we fhall have an equation, which, treated in the fame manner as in his method de tnaximii ct minimis, will give the ratio of C D ; C A. A» TANGENT. fluxions of the abfcifs A P, and tJie ordinate PM- «nd becaufe the triangles M m R and T M P arc fimilar, wc have R m : M R :: P M : P T. Let, therefore, the ahfcifs A P be put = X, and the ordinate P M =^, and we (hall hare y : X .: y : —. = p Y. By means of this general eKpref. fion for the fub-tangcnt, and the equation of the curve es- prHl.ng the relation between x and y, the ratio of the fluxions * and > will be found, and from thence the length ot the fub-tangcnt ; whence the tangent itfelf may be cafilT determined and drawn. This we fhaU iUuftrate in the fol- lowing examples : I. The equation defining a circle hax — Kx=y^- and by taking the fluxions of thefe quantities, ax -2xiz= 2yy confequently — = y a — 2 X i> J' and, molti* plying both fides by y, we have ^ = — i!_ = the fub- y ifl — .V fuppofmg P/. the increafe of the abfcifs = e, tangent PT {ice fig. 20.) ; whence U a — «) or AC — r_„_.:._ : c. „. .u - _..: ^ P, i.e. C P : (^) P M :: (j,) P M?P T ; a property of the circle deduced from the principles of common eeo- metry. ° II. The equation defining the common parabola is ok = >', a being the parameter, .-c the abfcifs, and y the or- ^/px; dinate ; hence ax = 2 yj, and — = — ; confequently. y x y a 2 ax As to the methods propofed by Hudde, Roberval, Huygens, &c. they differ fromthofc given above, only in the fame manner as in their methods of maxima and minima ; it would therefore be ufelcfs to defcribe them in this place. Barroiu's Method of Tangents — It is obvious from what is faid above, and what has been ftatcd under the article Maxi- ma et Minima, that both the method of tangents, and that for the greateft and leaft ordinates, were very nearly related to the prefent fluxional way of treating the fame fubjcfts ; hut with regard to tangents, a flill nearer approach was made by Dr. Barrow. This accurate geometer confidered the little triangle formed by the difference of the two ordinates, their diilance from each other, and the indefinitely fmall part of the curve, as fimilar to that which is formed by the ordinate, the tangent, and fub-tangent. He then fought by the equation of the curve, the ratio of the two fides ba, BiJ, (fg. 18.) of the triangle B 3 a, when the difference of the ordinates is infi- nitely little ; and then faid, 3& ba : B a :: ordinate B P : the fub-tangent T P. In the cafe of the parabola, for example, whofe equation hf=px '.."__"./■ and b a the correfponding increafe of the ordinate y z= a% then the equation for the ordinate p b becomes (jr -f ay =/. (x + e), or y^ + zay + a' — px + pi. ^ubtrafting from both fides j^^ =^ p x, there remains 2 ay -ir ci' ^= p e. Alfo a being itfelf infinitely fmall, its fquai-e «' may be entirely neglefted, and there refults z ay = pe\ therefore a : e ■.: p : 2y ; but a ■=■ b a, and e =.^ a, alfo y =z therefore, from the propofition ftated above, •uiz. ab : aB :: ordinate : fubtangent, we ha»e p : 2 ^ px :: ^f p x ; 2 x, the fubtangent required. Such were the principles employed in the folution of this interefting problem prior to the brilliant difcovery of the fluxional calculus, which from its generality fupplanted them all, and they are now therefore merely matters of hiftorical curiofity ; but as they exhibit the flow and progreflive ad- vances of genius and fcience towards an ultimate ftate of per- feftion, they are highly deferving of the attention of the mathematician, who will find in them much to admire ; they will at the fame time enable him duly to appreciate the tran- fcendant talents of that great philofophcr, who formed out of them one general and comprehenfive principle of folution, which will apply with equal facility to algebraical curves of every order. The Method of Tangents accordingto the DoSrim of Fluxions. — Its ufe is very great in Geometry ; becaufe in determining the tangents of curves, we determine at the fame time the quad- rature of the curvilinear fpaces : on which account it well deferves to be here particularly infilled on. To find the Sub-tangent in any algebraic Curve Let the pro- pofed curve be A M O ( Plate XIV. Anal.jig. 19.), and the right line T M Q a tangent to it at the point M ; let the femiordinate pm \>e infinitely near another P M, and M R parallel to A H ; then the relative celerities of the point M, moving along the curve from A towards O, in the dircftions M R and PM, with which A P and P M increafe in this po- _ _ „— _ _ fltion, will be truly expreffed by M R and R m ; but the " '^ 3 " •* " /v 2 " " a " celerities by which quantities increafe are as the fluxions of T being given, through which the tangent muft pafs, the thofe quantities ; therefore (Mm being the fluxion of the tangent itfelf may be drawn. curve line A^) MR and Rw are the correfpondipg V. Becaufe the equation, exhibiting the nnture of all kind» V ; therefore the fub-tangcnt P T {fs- 19- ) is the double of its correfponding abfcifs A P ; which is a well-known property of the parabola. III. The general equation for parabolas of any kind being a"' k" = ji" + " ; we have n a" x"- ' k any m + n X ' ' i ; and, therefore. X _ m-l-nxj''" -; whence y X m + n X y" y ~ na" xT- m-^-ny.a'" x' na" x' {heczuiey"*' = a"*") m -\- n X jc = the true value of the fub-tangcnt ; which, therefore, is to the abfcifs in the conftant ratio of m -f n to n. IV. The equation defining an cUipfis is b^ x ax — x* = a' f, A P (fg. 21.) being = x, MP=y, AB=a, and the leffer axis = b ; for by the property of the el- lipfis, we have a' : b' :: a x - x'' {A P X P B) : >' (M P') ; whence 3' x and, therefore, b' x ax— 2xx = za'yy. and — = a- y; 2a^y X a 2.V and, con- fequently, the fub-tangent P T p— ) = — -—/I— = b'y X a — 2x whence the point TANG Itiuds 9^ elUpfcs, (putting a aad c fur llie two priii- dpal ^ametws) is a-x^ x x" = ^ x jr"' * ", vre (hall l»ve -mix a — x^" - \ x. x" + n x x" ' xa — x|' •^ m + h X y"+'- 'y; and, therefore, X m + n X 31"' UL — m + n X a — «) " X x*^ _ m x" X a - .v'>'" - ' + n.x"- ' X a- *' . m-\-nXa — xXx m-r-tiy.ax — x'' ,- + ■. = a _ xl"- X «") = ; = - J -mx+nxa — x na — n+mxx =r the fubtangent required. VI. The equation defining the hyperbola is c' x f X + x' = a'' y', a and c being ufed to denote the two principal diameters ; whence we have, c^ x ax + z k x X ^^ y V X = 2 «' »i ; confequently — = ^ — ■ and - — =t y c' X ^a +x y a-y- r X ax + X _ ax -{- X- _ = the fubtangent ; e' X ^a + X c'' X ^a + X \a + x whence the diftance of the point of interfeftion of the tangent and axis from the vertex, which is equal to the difference of the fub-tangent and abfcifs, may be found ; ax + x^ I „ ^ for ==^ - * = T^ ■ ; and, therefore, that point ExNT. The preceding examples relate to curves, whofe ordinates are parallel to each other. We fhall now briefly illuftratc the method of drawing tangents to curves of the fpiral kind, all whofe ordlnales iffue from a point : fuch as the fpiral BAG ( Plate XV. Anal. Jig. I . ) whofe ordinates, C B, C A , C G, are referred to the point C, called the centre of tlie fpiral. Let SAN be a tangent to the fpiral at any point A, and let C T be perpendicular to it, and let the arc C B A (confi- dered as variable by the motion of A towards G) be de- noted by 2, and the ordinate CA by j'. Then z:y :: AC (>) : AT =-''^. Hence, if upon C A, as a dia- meter, a femicircle be defcribed, and in it, from A, a right line equal to -r- be infcribed, that right line will be a tan- gent to the fpiral at the point A. VIII. Let the nature of the curve C B A be fuch, that the arc C B A may be, always, to its correfponding ordi- nate C A in a conftant ratio, w'z. as a to i : then, becaufe X : y :: a : t, •we have z = -y-, and z ■ ; and, confe- being given, the tangent may be eafily drawn. The manner of drawing tangents to all forts of hyper- bolas umverfally, will be the fame as in the eUipfes, the equations of the two kinds of curves differing in nothing but their figns. After the manner above explained, the fubtangent, in curves whofe abfciffes are right lines, may be determined ; but if the abfcifs, or line terminating the ordinate, on the lower part, be another curve, then the tangent may be drawn as in the following example. VII. Let the curve B R F {Plate XIV. Anal. fg. 22.) be a cycloid ; whofe abfcifs is here fuppofed to be the femi- circle B P A, to which let the tangent P T be drawn, as above. Moreover, let r R H be a tangent to the cycloid, at the correfponding point R, and let G R e be parallel to T P ■« ; putting the arc, or abfcifs, B P = z, its ordi- nate P R ^ J-, A F = *, and B P A = ^ ; then, by the property of the cycloid, we ihall have c (BPA) : b (AF :: 2 (BP) :;, (PR) ) ; therefore j, = ^^ andi = hi. — = re. But by fimilar triangles, r* (j) : R« (= P ^ = i) t: P R (jy) : P H = ^ = ^ (becaufe J, = i?) ; con. fequently, if in the right line P T, there be taken P H equal to the arc P B, we (hall have a point H, through i^lMct U^ tangent of the cycloid muft pafe. quently, A T {^-P\ = ^ = — x A C : therefore A C Snd A T being in a conftant ratio, the angle CAT muft alfo be invariable ; which is a known property of the loga- rithmic fpiral. IX. Let BAA {Jig. 2.) be the fpiral of Archi- medes ; whofe nature is fuch, that the part E A of the ge- nerating ordinate, intercepted by the fpiral, and a circle, BED, defcribed about the fame centre C, is always in a conftant ratio to the correfponding arc B E of that circle. Suppofe A n perpendicular to AC; B C = c, C A = ^, and the given ratio of A E to B E, that of ^ to c ; then I : c :: y — c {KY.") : -^—j — = B E ; whofe fluxion is = cy If the right line C E A a be fuppofed to revolve about the centre C, the angular celerity of the generating point A, in the perpendicular direftion A n, will be to that of E, as A C to E C ; and as the latter of thefe celerities is ex- preffed by -j-, the former will be exprelTed by -— x - *' jy or ■'-J ; which is to j, the celerity of A in the direftion A a, as ~j- to unit, or as y to I. Confequently, C T and AT are in the fame ratio, and AC : CT :: -^ yy + bb ■.y; and AC : AT :: Vyy + i>b:b; whence C T and A T are given, equal to — — ^ , and '^ yy + ib "^ yy + ^^ fpeftively ; from either of which exprefllons the tangent A T may be drawn ; aad, in the fame manner, may the pofition of the tangent of any other fpiral be determined. Simpfon's Flux. vol. i. feft. 3. As to the method of inveftigating tangents by fluxions, fee Macl. Flux, book i. c. 7. where it is demonilrated in- dependently of infinitefiraals. To TANGENT. To determine the tangents of curves, fuppofed to be de- fcribed by the iiiterfeftions of right lines revolving about given poles, fee Mr. Maclaurin's Fluxions, art. 210, fcq. In finding the tangents of curves by tli- method of iiilinite- fimal differences, it has been objeftcd that the conclufion is found by a double error, i. By taking the curve for a polygon of an infinite number of fides. 2. By the falfo rule for taking the differentia] of a power. But there is no need of fuch fuppofitions in the method of fluxions, for it may be geometrically demonftratcd, tliat the fluxions of the bafe, ordinate, and curve, are in the fame proportion to each other, as the fides of a triangle refpeftively parallel to the bafe, ordinate, and tangent. When the bafe is fup- pofed to flow uniformly, if the curve be convex towards the bafe, the ordinate and curve increafe with accelerated motions ; but their fluxions at any term are the fame as if the point which defcribes the curve had proceeded uniformly from that term in the tangent. Any farther increment which the ordinate or curve acquires, is to be imputed to the acceleration of the motions with whicli they flow. See Maclaurin's Fluxions, book i. chap. vii. and viii. Any two arcs of curve lines touch together, when the fame right line is the tangent of both at the fame point. But when they are applied to each other in this manner, they never perfeftly coincide, unlefs they be fimilar arcs of Cmilar and equal figures. In the Philofophical Tranfaftions, we have the following method of drawing tangents to all geometrical curves, with- out any labour or calculation, by M. Slufius. Suppofe a curve, as D Q {Plate XV. Anal. jig. 3.) whofe points are all refcrrible to any right line given, as E A B, whether that right line be the diameter or not ; or whether there be more given right lines than one, provided their powers do but come into the equation. In all his equations, he puts -o for the line D A, y for B A ; and for E B, and the other given lines, he puts b, d, Sec. that is, always confonants only. Then, fuppofing D C to be drawn touching the curve in D, and meeting with E B produced in C, he calls the fought line, C A, by the name of a. To find which, he gives this general method. I. Rejeft out of the equation all members which have not either ■V or y in them ; then put all thofe that have j on one fide, and all thofe which have v on the other ; with their figns + or — ; and the latter, for diftinftion and eafe fake, he calls the right, the former the left fide. 2. On the right fide, let there be prefixed to each member the exponent of the power, which V hath there ; or, which is the fame thing, let that exponent be multiphed into all the members. 3. Let the fame be done alfo on the left fide, multiplying each member there by the power of the exponent of y ; adding this more- over, that one y mufl:, in each part, be changed into a. This done, the equation thus reformed will (hew the method of drawing the required tangent to the point D ; for, that being given, as alfo y, v, and the other quantities exprefled by confonants, a cannot be unknown. Suppofe an equa- tion iy — yy = v v, in which E B is called b ; ^ A — y, D A = 1), and let a, or A C, be required fo as to find the point C, from whence C D being drawn, (hall be a true tangent to that curve Q D in D. In this example, nothing is to be rejefted out of the equation, becaufejr or v are in each member : it is alfo difpofed, as required by the rule I ; to each part, therefore, there mud be prefixed the expo- nent of the powers of y or i>, as in the rule 2 ; and on the left fide, let one y be changed into a, and then the equa- tion will be in this form, ba - 2ja = zvv, which equa- JO 2VV tion reduced, gives cafily the value of a = ' " '" = A C. 6 — Zy And fo the point C is found, from wliich the tangent DC may be drawn. To determine wliich way the tangent is to be drawn, whe- ther towards B or E, he direcis to confidcr the numerator and denominator of the fratlion. For, i. If in bolii paru of the fraftion all the figns are affirmative ; or if the affirm- ative ones are more in number ; then the tangent is to run towards B. 2. If the affirmative quantities are greater than the negative in the numerator, but equal to thole in the de- nominator, the right line drawn through D, and touching the curve in that point, will be parallel to A B ; for in thi» cafe a is of an infinite length. 3. If in both parts of the fraftion the affirmative quantities are lefs tlian the negative, changing all the figns, the tangent mufl: be drawn now alfo* towards B ; for tliis cafe, after the change, comes to be the fame as the firll. 4. If the affirmative quantities are greater than the negative in the denominator, but in the numerator are lefs, or -vice verfi, then changing the figns in that part of the fraftion where they are lefs, the tangent mud be drawn a contrary way ; that is, A C mud be taken towards E. 5. But whenever the affirmative and negative quantities are equal in the numerator, let them be how they will in the denominator, a will vanifh into notiiing : and, confequently, the tangent is either A D itfelf, or E A, or parallel to it ; as will eafily be found by the data. This he gives plain examples of, in reference to the circle, thus : let there be a femicirclc, whofe diameter is E B ; in which there is given any point, as D (Jig. 4.), from which the per- pendicular D A is let fall to the diameter. Let D A = -u, B A =^', B E = i : then the equation will be by — yy -=1 ■V V, and drawing the tangent D C, we have AC, or a = 2 7) 1; 2y Now, if 6 be greater than zy, the tangent rnxiH be dravvn towards B j if lefs, towards E ; if it be equal to it, it will be parallel to E B, as was faid in the firil, Ucond, and fourth rules. Let there be another femicircle inverted, as N D D i/s- 5-)» the points of whofe periphery are referred to the right line B E, parallel and equal to the diameter. Let N B be called d, and all things elfe as before ; then the equa- tion will be by — yy z= dd ^ -vv — idv; which being ma- naged according to his rules, you have a = '"'" ~ ^"'"^ b — 2y Now, fince V here is fuppofed to be always lefs than d ; if b be greater than 2y, then the tangent muft be drawn towards E ; if equal, it will be parallel to B E ; if lefs, changing all the figns, the tangent muft be drawn towards B, as by rules fourth, fifth, and third. But there could be no tangent drawn, or at leaft E B would be it, if N B liad been taken equal to the diameter. Let there be another femicircle, whofe diameter N B {fg. 6. ) is perpendieular to E B, and to which its points arc fuppofed to be referred. Let N B be called b, and all things elfe as above ; the •11 L I J bv — 2W ,, equation will he yy = b-u — vv, and a = . If zy now, b be greater than 2 v, the tangent muft be drawn to- wards B ; if lefs, towards E ; if equal, D A will be the tangent, as appears by rules fourth and fifth. Tancjents, Inverfe Method of, is a method of finding the equation, or the couftruAion, of any curve ; from the tan- gent TAN gent of any other line, whofc determination depends on the tancent pivcn. This mt-thod is alfo one of the great refults of the new caliulus intfgralis. .... , r n tu a Its application we fliall give m what follows. 1 he Hux- ional exprcffions of the tangent, fub-tangent, &c. being de- livered under the lall article, if you make the given value equal to the fluxional txpreflion, and either fum up the fluxional equation, or, if that cannot be, conftrua it, the curve required is had. For example : ^ y' I. To fnd the curve-line, nuhofe fub-tangent = —^^ Since the fub-tangent of an algebraic line is = haveJ^ = 2S- and ay X =^ ty yt and a X =■ zy y therefore (taking the fluents by the inverfe method of flux- ions) ax = y"". The curve fought, therefore, is a parabola ; whole con- ftruftion is (hewn under Parabola. 2. To find the curve, nuhofe fub-tangent is a third propor- yx tiond /o I a - x and y. Since ia - x : y :: y : —.we have \a — x:y {-.-.yy -.yx) ::} : i; confequently lai — XX = yj, and, taking the fluents, \ax — i x' = i ^% i.e. ax — x'' =■ y''- The curve fought is, therefore, a circle. 3. To find a line, wherein the fub-tangent is equal to the femiordinate. Since ^ = y ; y x = yy , zni. x = y ; there- fore X ^= y. Hence it appears, that the line fought is a right hne, which refpefts the cathetus of an equicrural triangle, as an axis, or the hypothenufe of an equicrural reftangled triangle. If X had been taken for the arc of a circle, the line fought had been a cycloid. TANGER, in Geography, a river of Weftphalia, which runs into the Elbe at I'angermunde. TANGERE, ATo/ime. See Noli. TANGERMUNDE, in GfOfra/ij-.atown of Weftphalia, in the Old Mark of Brandenburg, fituated on the Elbe, where feflels pay a toll : the chief trade of the town is brewing ; 24 nules N. of Magdeburg. N. lat. 52° 32'. E. long. 12° 2'. TANGHOO, or Tenhoa, a capital of a province of Tonquin, fituated on a fmall river near the W. coaft of the gulf of Cochinchina. Rice and cattle conftitute the chief riches of the province. The town is called " Cua- bang." N. lat. 19° 40'. TANGIA, a town of Arabia, in the province of Hedf- jas ; 50 miles W.N.W. of El Catif. TANGIBLE. See Tactile. TANGIER Islands, in Geography, feveral iflafids of the Chefapeak, near the coaft of Maryland, oppofite to the mouth of the Potomack. N. lat. 38° 12'. W. long. 76° 12'. TANGIERS, anciently called Tinjis and Tingia, and now by the Arabs Tinjiah, a town of Africa, in Fez, fituated at the weftern mouth of the ftraits of Gibraltar, about a day's iourney from Tetuan. This town was firft poflefled by the Romans, who took it under Strtorius ; next by the Goths ; and it was furrendered by count Julian to the Saracens. It was taken in 147 1 by Alonfo, king of Portugal ; and given TAN to Charles II., king of England, in 1662, as a. marrjagir portion with the princefs Catherine of Portugal. The Englifli abandoned it in 1684, after deftroying the mole and fortifications. Although now almoft. in ruins, it ftilF re- tains fomc batteries, in tolerable condition, facing the bay ; at the bottom of which are a river, and the remains of the bridge of Old Tangiers ; but on account of the accumu- lated fand, the bridge, if it had continued, as well as the rivt-r, would be ufck'fs. The bay of Tangiers, independently of Ceuta, is fo fituated, being the narroweft part of the ftraits, that it muft be favourable to Moorifli piracy ; but Tangiers can never be a commercial town, as it has few produftions iij its vicinity ; the Spaniards, however, formerly (hipped in this place, eggs, vegetables, and fome fruits ; and the Englifli at prefent obtain fupplies for their garrifon at Gibraltar. The bay of Tangiers is not very fafe when the wind is in the weft, having been encumbered by the ruins of the mole and fortification, as the cables are liable to be rent, and the fliips to be driven on (hore. The beft anchorage for frigates and the larger velTels, is at the eaftern point, whence they may eafily fail whatever way the wind fets : however, the bay is only dangerous in winter ; 108 miles N.N.W. of Fez, and 38 W.S.W. of Gibraltar. N. lat. 35° 42'. W.long. 5°5o^ Clienier's Morocco. TANGLAKE, in Ichthyology, the viviparous blenny of Pennant ; the muftela vivipara of Willughby, Ray, &c. ; and the blennius viviparus of the Linnean fyftem. TANGME W, in Geography, a town of the Birman empire, on the right bank of the Ava ; 10 miles N.W. of Prome. TANGO, a town of Japan, in the illand of Niphon ; 65 miles S.W. of Meaco. TANGOLOTANGO, a feaport town of Mexico, in the province of Guaxaca, near the gulf of Mexico ; 100 miles S.S.E. of Guaxaca. N. lat. le" 8'. W. long. 97° 36'. TANGONE, a town of New York ; 9 miles "W. of Kingfton. TANGOUZI, a town on the eaft coaft of Madagafcai. S. lat. 19° 5'. E. long. 49-^12'. TANGOUZLIO, a town of Afiatic Turkey, in Na- tolia ; 70 miles E.S.E. of Smyrna. TANGU, a city of Pegu, and capital of a province which was formerly a kingdom ; fituated a conliderable dif- tance to the north of Pegu. TANGUEY, or Tonguey, a town of Chili, on the coaft. S. lat. 30° 30'. TANGUI A, a river of Chinefe Tartary, which rifes near mount Ilha, and running nearly fouth, falls into the river Ya-lou-kiang. TANGULAW, a fmall ifland in the Spanifli Main, near the Mofquito fliore. N. lat. 13° 35'. W. long. 83° 55'. TANGUT. See Thibet. TANG-YANG, a lake of China, about thirty miles in circumference ; 32 miles N. of Hoai-ngan. TANIALA, a town of Hindooftan, in Palnaud ; 25 miles E.N.E. of Timerycotta. TANIBOUCA, in Botany, a Caribsean name, to be tole- rated only till the genus is properly underftood. — Aubl. Guian. 448. Ju(r. 76 Clafs and order, Decandria Mono- gynia. Nat. Ord. Elaagni? JulT. Gen. Ch. Cal. Perianth fuperior, of one leaf, bell-(haped, internally downy ; its limb in five deep, roundi(h, acute feg- ments. Cor. none. Stam. Filaments ten, thread-fhaped, inferted into the tube of the calyx, as long as its limb ; anthers oval, of two lobes. Pfl. Germen inferior, round- ifli ; ftyle folitary, thread-fliaped, curved ; iiligma fimple. Peric Eff. T A N Eir. Cli. Calyx bell-fliapcd, five-cleft, fuperior. Corolla none. Fruit 1. T. guianenfis. Aubl. t. 178. — Native of maifhes in Guiana, flowering in May. A tree, whofe trunk is twenty foet, or more, in'height, and two feet in diameter, tvitli a vvhitilh, light and brittle wood ; the batk, greyifh.. Branches fpreading every way ; their young {hoots leafy at tiic ends. Leaves deciduous, alternate, ftalked, obovate, pointed, en- tire, coriaceous, fmooth ; the largell feven inches long, and three broad. Spikes axillary, folitary, ftalked, about three or four inches long, of many fmall, alternate, greenidi, fra- grant Jlowers, clothed internally with white hairs. Aublet not having met with the fruit, nor liavjng been able to deter- mine any thingiof the internal ftrufture of the minute ^frmm, we are left in great doubt as to the effential characler of this genus, and even fts natural order. Nothing is recorded of its ufe or qualities. TANICHI, in Geography, a town of Hindooftan, in the Carnatic ; 16 miles S.S.W. of Tritcliinopoly. TANILA, a river of Mexico, wliich runs into the gulf of Mexico, N. lat. 18° 10'. W. long. -95° 6'. • TANINGE, a town of France, in the department of the Leman ; 24 miles S.E. of Geneva. Takjong Currang, a town on the weft coalt of the ifland of Lombock. S. lat. 8° 31'. E. long. 115° 48'. Tanjoxg Putus, a town of Malacca, on the north fide of tlie river Pera, where the Dutch have a faftory. TANJORE, a country of Hindooftair, included in the Carnatic ; bounded on the north and weft by part of the Carnatic, and on the call and foutli by the gulf of Bengal : about ninety-five miles in length from north to fouth, and lifty in breadth from eaft to weft ; watered by the river Cauvery, which divides itfclf into feveral fti-eams. Though torming a part of the Carnatic, it is governed by a prince or •rajah, and pays an annual fubfidy to the Englifti of 160,000/. ilerling. Tan.fore, a town of Hindooftan, and capital of a country to which it gives name, fituated in a plain between two branches of the Cauvery ; including the iuburbs, about two leagues in circumferejice ; a double wall and a large ditch are the only defence. The palace is fituated to the eaft of the town, and is a grand fquare, fortified with a wall and a wet ditch, abounding in crocodiles. It was originally only a pagoda. In 1773, this city was taken by the Britifti under general Jofeph Smith ; 176 miles S.E. of Seringapatam. N. lat. 10=' 46'. E. long. 79" 10'. TAN IS, in Ancient Geography, a town of Egypt, fitu- ated bet%veen the Mer.defian mouth of the Nile towards the ■weft, and the Pelufiar. mouth to tlie eaft. It lay on a fmall branch of the Nile, and gave its name to one of the mouths of the river. This town was the capital of the nome called Tanites. TANISTRY, Takjstria, an ancient municipal law, or tenure, which allotted the inheritance of lands, caftles, &c. held by this tenure, to the oldeft and moft worthy and capable perfon of the deceafed's name and blood, without any regard to proximity. This, in reality, was giving it to the ftrongeft ; and this naturally occafioned bloody wars in families ; for which reafon it was abolifhed under king James I. Sir John Davies defcribes it thus : " Quant afcun perfon moruft feifie des afcuns caftles, m.jmors, terres ou tenements del jiature et tenure de tenijlry ; que donques mefmes le caftles, &c. doent defcender, et de temps dont memory ne court ont ufe de defcender, Seniori et dignijfimo viro fanguints et cogno- minis de tiel perfon," &c. Vol. XXXV. TAN TANITICUM Ostium, in Ancient Geography, the name of the fixth mouth of the Nile, in palling from the weft to the eaft. TAN RABAT, \n Geography. See Tantabee. TANKARD Turnip, in Agriculture, the common Eiiglifli name of a particular fort of this kind of root, which has thj property of ftaiiding high above the ground. It is a good fort for feeding off before the froft fets in, in the winter fcafon ; but after that has taken place, it is not fo v.iluable or ufeful, as being more liable to be injured and affeded by it than the other forts, in confequence of ftand- ing expofcd fo much above the furface of the land. Sec TUUNIP. TANKERDSONG, in Geography, a town of Thibet ; 230 miles E. of Lafla. N. lat. 29° 50'. E. long. 100°. TANKESIR, a town of Perfia, near the gulf; 9 mile N. of Buftleer. TANKISA, a town and fortrefs of Thibet, at the foot of a mountain, which is faid to exhale fuffocating fumes ; 1 20 miles N. W. of Taffafudon. N. lat. 28° 23'. E. long. 87° 20'. TANKROWAL, a town of Africa, in the kingdom of Kaeii, with a faftory belonging to the Englifli African com- pany, near the river Gambia. The Portugucfe have a church there. The chief trade is in wax. N. lat. 13° 10'. W. long. 14° 27'. TANKUNNY, a town of Hindooftan, in Berar ; 20 miles W. of EUichpour. TANLA Y, a town of France, in the department of the Yonne ; 6 miles E. of Tonnerre. TANLOCOM, a town of Mexico, in the province of Guafteca ; 40 miles S.W. of St. Yago de los Valles. TANNA, an ifland in the South Pacific ocean, and one of thofe called New Hebrides, difcovered by captain Cook in the year 1774 ; about twenty-two miles in length, and ten in breadth. Tiic inhabitants would not fuffer captain Cook, or any of his company, to advance far into the ifland. The produce, as far as could be feen, is bread-fruit, plantains, cocoa-nuts, a fruit like a nectarine, yams, tarra, a fort of potatoe, fugar-cane, wild figs, j fruit like an orange, which is not eatable, and fome other fruits and nuts. Captain Cook doubts not but nutmegs likewife grow in this ifland. The bread-fruit, cocoa-nut, and plantains, are neither fo plenti- ful nor fo good as at Otaheite ; on the other hand, fugar- canes and yams are not only in great plenty, but of fuperior quality, and much larger. One of the latter weighed fifty- fix pounds, every ouHce of which was good ; hogs did not feem to be fcarce ; but they faw not many fowls. Thcfe are the only domeftic animals they have. Land-birds are not more numerous than at Otaheite, and the other iflands ; but they faw fonie fmall birds, with a very beautiful plu- mage, whicli they had never feen before. There is a great variety of trees and plants. The inhabitants of this ifland, as well as thofe of Erromango, were at firft thought to be a race between the natives of the Friendly Iflands and thofe of Mallicollo ; but upon further acquaintance, it was found that they had little or no affinity to either, except in their hair, which is generally black and brown, growing to a tolerable length, and very crifp and curly. Their beards, which are ftrong and briftly, are generally fhort. One of the languages which they fpeak is nearly, if not exaflly, the fame wjth that of the Friendly Iflands : the other, which is alfo that of Erromango and Annatom, is properiy their own. Thefe people are of the middle fize, rather {lender than othjir- wife ; many arc little, but few tall or ftout ; moft of them have eood features and agreeable countenances, are, like all ^ ^ L the TAN the tropical race, aflive aiul nimble, and fcem to excel in the ufc of arms, but not to be fonil of labour. Both fexes are of a very dark colour, but not "black ; nor have they the lead charafterillic of the negro about them. They make them- fclves blacker tlian they really are, by painting their faces with a pigment of the colour of black lead. They alfo ufe aiiother fort, which is red ; and a tliird fort, brown, or a colour between red and black. All thcfe, but efpecially the firft, thev lay on with a liberal hand, not only on the face, but on the neck, flioulders, and breaft. The men wear no- thing but a belt, and the wrapping-leaf, as at MaUicollo. The women have a kind of petticoat, made of the filaments of the plaintain-tree, flags, or fome fuch thing, which reaches below the knee. Both fexes wear ornaments, fuch as brace- lets, car-rings, necklaces, and amulets. The bracelets are chiefly worn by the men ; fome made of fea-fliells, and others of thofe of the cocoa-nuts. The men alf6 wear amu- lets ; and thofe of mod value being made of a greeniih ftone, the green ftone of New Zealand is valued by them for this purpoft. Necklaces aie cliiefly ufed by the women, and made moftly of fhells ; ear-rings are common to both fexes, and thofe valued moft are made of tortoife-fltell. Thefe people, befide the cultivation of ground, have few other arts worth mentioning. They know how to make a coarfe kind of matting, and a coarfe cloth of the bark of a tree, which is chiefly ufed for belts. The workmanfhip of their canoes is very rude ; and their arms, with which they take the moft pains in point of neatnefs, come far fhort of fome others. Their weapons are clubs, fpears, or darts, bows and arrows, and ftones. The clubs arc of three or four kinds, and from three to five feet long. Captain Cook knew no more of their cookery, than that it confifts of roafting and baking ; for they have no veftels in which water can be boiled. Nor did he kno.w that they had any other liquor but water, and the juice of the cocoa-nut. They were utter flrangers to their religion, and but little acquainted with their government. They feeni to have chiefs among them, at leaft fome were pointed out to him by that title-, but they appeared to have very little authority over the reft of the people. They gave ntimations that they praftjfed circumcifion, and that they allowed themfelves to eat human flefti ; but captain Cook fays, that it admits of doubt whether they are cannibals. The idand contains a very conliderable volcano, and fome hot fprings were difcovered, which raifed the thermometer frpm 80° to 170°, and in one place to 202°. Captain Cook named the harbour where he lay. Port Refolution, from the name of the fliip, wliich was the firft that had ever entered it: which is fituated in S. lat. 19° 32' 25". E. long. 169° 44' 3j". The variation of the needle was 7° 14' I2"E. ; and the dip of its fouth end 45° 2^'. The time of high water on full and change days was about 5'" 45'", and tlie tide rofe and fell three ieet. Tanna, a town of Hindooftan, in the ifland of Salfette, on the eaft coaft ; 15 miles N.E. of Bombay. N. lat. 19° 13'. E. long. 72° 53'. Tanna, or Thann, a town of Saxony, in the county of Reuffen ; 17 miles S.W. of Greitz. N. lat. 50° 25''.. E. long. 1 1° 57'. Tanna Balloo, a fmall ifland in the Eaft-Indian fea, near the eaft coaft of Borneo. N. lat. 4° C2'. E. lone-. 118° 21'. ^ Tanna Mera, a fmall ifland in the Eaft-Indian fea, near the eaft coaft of Borneo. N. lat. 3° 45'. E. long. 117=5'. TANNA R, a town of Bengal ; 35 miles E.S.E. of Moorftiedabad. TAN TANNAS, a town of Sweden, in Harjedalen ; 15 miles N.W. of Langafchantz. TANNASER, a town of Hindooftan, in the fubah of Delhi. This place was formerly held facred by the Hindoos. In 101 1 it was taken by Mamhood, king of Gizni ; 45 miles N.E. of nifl"ar. N. lat. 29° 31'. E. long. 76° 20'. TANNAY, a town of France, in the department of the Nievre ; 16 miles S.S.E. of Clamecy. TANNDORF, a town of the principality of Culmbach ; S miles S. of Culmbach. TANNEBERG, a town of Auftria ; 8 miles S. of Aigen. TANNED Hide. See Hide and Leather. TANNENBERG, in Geography, a town of PruflTia, in the province of Oberland ; 6 miles S.S.W. of Hohenftein. — Alfo, a town of Saxony, in the circle of Erzgebirg ; 6 miles S.W. of Wolkenftein. TANNER, Thomas, in Biography, an Englilh prelate, and eminent antiquary, was the fon of a clergyman, who was vicar of the parifh of Market Levington, in Wiltfliire, where he was born in the year 1 674. He entered into Queen's college, Oxford, in 1689, and having graduated as B.A., he removed to All-Souls college in 1694, of which he became a fellow in 1696. At the univerfity he devoted himfelf very much to the ftudy of antiquities, and in 1695 publiflted his " Notitia Monaftica," or " A ftiort Account of the rehgipus Houfes in England and Wales," which attrafted notice ; and foon after Dr. Moore, biftiop of Norwich, appointed, him his chaplain, and in 1701 made him chancellor of his diocefe ; which office led him to acquire an extenfive and correft ac- quaintance with municipal and ecclefiaftical law, fo that he was often confulted by the dignitaries of the church. Having married the bifhop's daughter, he obtained in fuc- ceflion various prefeiTnents ; and in 1 710 he took the degree of DiD. In 1723 he became canon of Chrift-church, Ox-- ford; in 1727, prolocutor of the lower houfe of convo- cation ; and in 1732, bifhop of St. Afaph. He died at Chrift-church, in 1735, where he was buried. He was thrice married, but left only one fon. He was diftinguiftied by the exemplary difchargeof his clerical fun&ions, and by the liberality of his charities. Availing hmifelf of papers prefented to him by Wood, lie puhlillied a fecond edition of his " Athenae Oxonienfes," much correfted and enlarged, with the addition of more than five hundred lives from the author's MS. Lond. 1721. 2 vols. fol. A pofthumous work, founded on his Notitia, and entitled " Notitia Monaftica j or, an Account of all the Abbies, Priories, and Houfes of Friars, heretofore in England and Wales, and alfo of all the Colleges and Hofpit^ls founded before 1540," was pub- hflied by his brother, the Rev. John Tanner, Lond. 1744. fol. Another elaborate work, on which he had beftowed the application of forty years, entitled " Bibliotheca Bri- tannico-Hibernica ; five, de Scriptoribus qui in Anglia, Scotia, et Hibernia, ad Szeculi xvii. initium floruerunt, lite- rarnm ordine juxta familiarum nomina difpofitis Commen- tarius, &c." was publiflied in 1748, fol. under the care of Dr. Wilkins, who prefixed to it a learned preface. He had alfo made coUeftiqns for the hiftory of his native county of Wilts, but by removal to a diftance he was pre- vented from profecuting his delign. To the Bodleian li- brary he bequeathed many valuable papers, tending to illuf- trate the hiftory of thefe illands, and he made feveral com- munications of a fimilar nature to the Society of Anti- quaries, of which he was a member. His various labours in this way rank him among the moft valuable contributors to Britifti hterature and ecclefiaftical hiftory. Biog. Brit^ Gen. Biog. Tannt;r, T A N Tanker, a perfon who m;uuif;i£tiiix-s liidca and (liins by tanning. It is only within a few years paft, tliat the tanners ot this country have been Hberated from a variety of penalties and prohibitions, which were extremely opprelllvc, and long re- tarded the progrcfs of the manufafture. Ill the reigns of Elizabeth and James I. when patents of monopoly were in exiftence — when the true principles of trade were not well undetilood — and when the leather manufac- ture was condufted by unllcilful pcrfons, fome rules and re- gulations as to the mode and manner of tanning, the ma- terials to be employed, and the time to be confunied in the procefs, might, perhaps, be in fome degree necelfary : but fuch prohibitions and reltriftions were, wholly inapplicable to the prefent enlightened age. It was not, however, till 4808, after a long parliamentary inveftigation, that the aft I James I. c. 22, and others of a fimilar tendency which had long difgraced our ftatute-book, were at length repealed by the 48 Geo. III. c. 60. By this aft, the tanner is now allowed, like all other manufafturers, to exercife his ingenuity in the difcovery of new materials or new methods, in abridging the time or improving the procefs. Nor can any injury thereby arife to the community ; for the compe- tition which in this country exills in every branch of trade, combined with the credit and the intereft of the parties, will always infure to the public the produftion of the belt ar- ticles which can be manufaftured. See Leather, Taw- ing, and Vellum. TannerV Bart, is the bark of the oak or other tree, which, after it has been ground in a mill into a coarfe pow- der, is ufed in tanning of leather. When the tanning prin- ciple has been wholl)' exhaufted, it is taken out of the pits, aiid called tan. It is then fold to the gardeners, who ufe it \n hot-houfes to produce an artificial heat, for the pur- pofe of railing pine-apples, &c. After a certain time the tan ceafes to caufe fermentation : it is then taken out of the hot-houfe, and, when entirely rotted, becomes a vegetable mould, and is employed as a manure in kitchen-gardens and on grafs-land. With refpeft to its advantages as a manure, different opi- nions are entertained. MiDer, Mortimer, and others, have reprefented it as highly nutritious, while more modern agri- culturalifts confider it of very little value. When, however, it istlended and incorporated with other vegetable fubftances, or with hme or earthy matter in certain proportions, cautioufly employed, and laid on foon after Michaelmas, it will be found a good top-drefling for ftiff and cold grafs-land. TANNETE, in Geography, a town on the W. coaft of the illand of Celebes. S. lat. 4° 14'. " E. long. 1 20° 4'. T ANNE WANG, a river on the S. coart of the illand of Celebes, which runs into the fea, 5 miles W. of Bonthain. TANNHAUSEN. See THA>ranAUSEN. TANNIN, in Vegetable Chemijiry, a peculiar fubtlance which is naturally formed, and exifts in a great number of vegetable bodies, fuch as oak bark, galls, fumach, catechu, &c. Its name is derived from the eft'eft it has in converting the gelatine into leather. Several proceffes have been given to obtain pure tannin, which have been fo various in their refults, as to induce che- rhifts to fufpeft the identity of tannin. The procefs recommended for procuring pure tannin, is to powder nutgalls, and make an infufion in water, which wdl be of a deep brown colour. Evaporate th.e infuijon with a gentle heat till it is very ftrong, but ilill retaining its humi- dity. Add to this a faturated folution of carbonate of potafh. A^yellowilh-white precipitate is formed, which is faid to be TAN pure tannin. When the liquid part is poured ofl', a little cold water mull be added to walh the precipitate, as a large quantity would dilfolve it again. When the precipitate is feparated and dried, it alTumes the appearance of rcfin, having a vitreous frafture. It is of a brown colour. Its talle ij bitter, and (Irongly aftringent. It is very foluble in water. The folution becomes frothy by agitation, as if it contained foap. It dilTolves ftill more plentifully in alcohol. The fo- lution is of a dark-brown colour, diflfering little in its pro- perties and appearance from what has been termed tinfturc of galls. For our firft knowledge of this fubftance in a definite ftatc, we are indebted to Deyeux. Scguin afterwards feparated it by means of a folution of gelatme, the matter which was prccipatcd being a fubftance, having the fmell and many other properties of leather. Thefe fads led to the great nnprovements he made in the procefs of tanning, of which no true theory was known before his time. For a more minute inveftigation of the properties of tannin, we are indebted to Prouft. He obtained his tannin by adding an acid to a concentrated infufion of nutgalls. A preeipitate is obtained of the confiftency of pitcli. This precipitate is tobewafhedwitha littlccoldwater, withtlic fame caution obferved in the lail procefs. The precipitate is now to be diffolved in boiling water, and carbonate of potafh added, which takes up the acid and precipitates the tannin. Prouil recommends the following procefs for procuring pure tannin. Drop into an infufion of nutgalls, a folution of muriate of tin. This gives a yellow precipitate, which being fepai-ated, wafhed, and dried, is of a buff-colour. This is a compound of oxyd of tin and tannin. He then mixes this powder vi-ith water, and palVes through it fulphuretted hy- drogen gas. The fulphur combines with the tin, and becomes infoluble, while the tannin diffolves in the water. When the fulphuret is feparated, and the folution of tannin evaporated with a gentle lieat, a brown fubftance is left be- hind, v/hich he contidercd as pure tannin. Another procefs for obtaining tannin from infufion of nutgalls, has been given by Merat Guillot. This confills in mixing pure water with an infufion of galls. If to this mixture dilute nitric or muriatic acid be added, a deep brown precipitate is formed, which, when dry, becomes black. This he fuppofes to be pure tannin. Trommfdorff has fhewn that all thefe proceffes are infuf- ficient to produce pure tannin. As the fubftance called extraft was contained in all the above precipitates, and more or lefs gallic acid, he made a great number of experi- ments to obtain pure tannin ; and although he obtained it nearer to a Hate of purity than any of his predeceffors, his labours were not completely fuccefsful. He evaporated the infufion of galls with a gentle heat to one-fourth its bulk. The liquid became muddy from the precipitation of ex- traftive matter, and was feparated by ftraining. It was now" further evaporated to the confiltence of jelly, and ulti- mately dried by a gentle heat. He now digefted the mafs with pure alcohol, till no more gallic acid could be taken up. He then confidered the mafs left behind as pure tannin, or nearly fo. In order to afcertain if it ftill contained extraft, he re -diffolved it in pure water, and evaporated this and future portions of water from it, judging that if any extraft ftill remained it would become infoluble by oxygenation, and thus be precipitated, but no depofition took phice. Suf- pefting it might contain mucilage, he left the folution in a warm place for fome time. It became covered with mould, which he attributed to the prefence of mucilage. The mould was feparated by filtration, and the folution cvapo- L 2 rated TANNIN. rated to dryiicfs, which left the tannin in "a (tatc of eon- fidcrablc purity. He ftill, however, found that it contained a portion of fulphate of lime. In order to feparate this fait, he diflblved ihe tannin in water, to which he added carbonate of potafs : this caufed a precipitation, which has been already noticed. The dear liquor being feparatcd, a foiution of acctite of lead was added to it. A precipitate fell down, which confifted of tannin, combined with ox yd of lead, and probably ful- phate of lead. The hmc alfo combined with the tannm, forming an infoluble compound. He then fcparated this precipitate, mixed it with water, and pafTcd a ftrcam of fulphurctted hydrogen gas through it. The lead and falphur became feparatcd, and the combination of lime and tannin unchanged, while the pure tannin remained in foiution, which was obtained by evaporating the feparatcd liquid to drynefs. The tannin thus obtained, approaches much nearer to purity than that obtained by any of the former proceffes. But we (hall (hew further on, that, even in this (late, its purity is doubtful. Tannin obtained by the above procefs does not differ much from that formed by the other proceffes. We' have already ilated it to be foluble in alcohol : when, however, bioth the tannin and alcohol are pure, the tannin does not diffolve. Moll of the metallic oxyds form infoluble compounds with tannin. There is, however, great reafon to believe that the gallic acid, which is difficult to feparate from it, has a much greater " effect upon thefe bodies. It is fup- pofed that when the metallic oxyds are precipitated by tan- nin, the latter combines with the oxygen, and, in feme inftances, converts the tannin into extraft. The common method of detaching the prefence of tannin is by a foiution of gelatine in water. Ifinglafs is moftly ufcd for this purpofe. The folutions both of the tannin and the gelatine (hould be in a coniiderably concentrated ilate ; as weak folutions of either rediffolve, to a certain extent, the precipitate which the tannin forms with the gelatine. The gelatine fhould be quite frefh, as the precipitate is imperfecl when it has the lead figns of putridity. Sir Humphrey Davy ftates that the proportion of the gelalme to the water (hould be 1 20 grains of the former to 20 ounces of the latter. According to the authority of the fame chemift, the com- pound formed by the tannin and gelatine dried at 1 50°, is compofed of Gelatine . . . . ^^ Tannin - - - - 46 100 Potafh, foda, and ammonia, combine with tannin, forming compounds which are lefs foluble in water than pure tannin. Thefe idkalies have a ftronger attraftion than gelatine for tannin; as the alkaline folutions do not precipitate gelatine till the alkali is faturated by an acid. The combinations of the earths vpith tannin are moftly infoluble. Thofe with barytes and lime are (lightly fo, and do not precipitate gelatine till an acid is added. Moft of the acids form infoluble compounds with tannin ; but v.hen extraft is prefent, it is alfo precipitated : hence the imperfetlion of the procefs for feparating tannin by acids. When perfectly free from gallic acid it has no aftion upon fulphate of iron ; but it produces a deep bhie pre- cipitate from the oxyfnlphate : hence its efieft in commoD 5 writing-ink and black dye. The black is not complete without expofure to the air. The precipitate which the tannm forms is very heavy, and alniolt immediately feparates from the water ; while that formed by the gallic acid re- mains longer fufpendcd, ajid certainly, on that account alone, is an cflTential ingredient in writing-ink. Taimin exifts in a great number of vegetables in fome proportion, but is the moft abundant in nutgalls ; and of them, the Aleppo galls afford the moft. Sir Humphrey Davy has given the following analyiis of the Aleppo galls. He extrafted, by infufion with water, all the foluble part from 500 grains of powdered galls. .This foiution he fub- mitted to (low evaporation, from which he obtained, in folid matter, 1 85 grains. Thefe he found to confift of Tannin ...... GaUic acid, with extractive matter Mucilage and matter rendered infoluble"} by evaporation . - . .j Calcareous earth and (aline matter 130 3' 12 12 185 We are indebted to the fame diftlngui(hed chefijift for bringing into notice a new fubftance, which contains a large proportion of tannin. This fubftance is brought from the Eail Indies, and is known by the names of catechu, or terra Japonica. It is produced by the evaporation of a vegetable fufion from the wood of a fpecies of mimofa, which grows in India. There are two varieties of this fubftance, one brought: from Bengal, and the other from Bombay. The former is of a chocolate colour, of the fpecific gravity I-.28 ; the latter of a lighter colour, of the fpecific gravity 1.39- Both have an aftringent tafte, leaving an impreffion of fweet- nefs. They are not changed by expofure to the air. Sir Hiimphrey procured an infufion from this fubftance by long decoftion, the fpecific gravity of which was 1.102 : 500 grains of this infufion yielded, by evaporation, 41 grains of folid matter ; 34 of which were tannin, and 7 of a pe- culiar extraftive matter. This fubftance, in its original ftate, feems to contain a very large proportion of tannin. The above chemift found that 100 grains of the powdered catechu required 18 ounces of water for its infufion. The refiduum, or undiffclvcd part, is feldom more than -rT-th of the original weight, and condfts of calcareous and aluminous earth, with a little fine fand : 200 grains of the Bombay catechu gave Tannin -.-... jop Peculiar extraft . - . . . gg Mucilage - - - - - - 13 Of the refiduum above-mentioned - lo . 200 The catechu from Bengal gave, in 200 grains, Tannin - - . - - . py Peculiar extraftive matter ... yj Mucilage -..-.. i5 Refidual matter, confifting of hme, :du-7 mine, and fand - - ■ "i »4 The TANNIN. Die great iincertjiinty which has prevailed refpefting the definite nature of tannin, feems to have been completely removed by the very important difcovery made by Mr. Hatchett, who has fucceeded in forming artificial tan- nin. An account of his experiments may be found in three papers in the Philofophical Tranfaftions for 1805 ;uid 1806. The moft direfl procefs which is given for obtaining it, is by pouring an ounce of nitric acid, diluted with two parts of water, upon 100 grains of charcoal, in a matrafs. This is to be placed in a fand-heat. Great effervefccnce takes place, and much nitrous gas is difcngaged. At the end of two days he added a fecond ounce of acid, and fometimes even a third. The digelUon is continued till the whole is difTolved. This folution is of a reddifli-brown colour. It is then to be (lowly evaporated to drynefs, which produces a brown glolTy fubftance, exhibiting a refi- no js frafture. This fubftance has the following properties : 1. It diflTolves in cold water and alcohol. 2. The flavour is highly allringent. 3. Expofed to heat, it fmokes a little, fwells up, and af- fords a bulky coal. 4. The folution in water reddens litmus paper. 5. It copioudy precipitates the metallic falts, efpecially the muriate of tin, acetite of lead, and oxyfulphate of iron. The precipitates are commonly of a brown colour. 6. It precipitates gold in the metallic flate. 7. It precipitates the earthy falts ; fuch as the nitrates of lime, barytes, &c. 8. When the ahkalies are added to this folution, the colour becomes deeper, and ultimately turbid. 9. A folution of ifinglafs added to the fame folution jjro- duces a precipitate, which is infoluble in boiling water, re- lembling in its cffential properties the precipitate formed by the natural tannin. . Mr. Hatchett produced the fame fubftance by treating various kinds of coal in the fame way, fuch as pit-coal, coke, and animal charcoal. What may feem very curious, he formed it from the coal ot one portion of ifinglafs to pre- cipitate another portion difTolved in water ; and hence aflferts that one portion of the Ikin of an animal may be employed to convert the other into leather. Of the different fubftances employed, he found thofe the beft which confifted of carbon unmixed with other vege- table matter, which always reduced the quantity ; and that thofe. vegetable fubftances which contained gum or mucilage, produced the leaft tannin. When he fucceeded in producing tannin from other vege- table fubftances, fuch as indigo, refin, lac, and many other bodies, it was by repeatedly adding frefh nitric acid ; by which he \erf properly fuppofes that the carbon be- comes feparated, fo as to put it under fimilar circumftances to the charcoal itfelf. Indigo produced the moft in this way. At the commencement of his paper he mentions the faft of Mr. Chenevix having found that coffee-berries ac- quired, by roafting, a portion of tannin. He made fome . experiments which, although not very fuccefsful, convinced him that the chief charafteriftic properties of tannin may be formed or developed at fome particular temperature and under favourable circumftances, by very fimple means. He ingenioufly conjeftures, that the tannin found in fome varieties of peat has been produced in this way. In making ufe of fulphuric acid to char various fubftances, he found that, in ^me inftances, the artificial tannin, or a fubftance nearly rcfembhng it, was formed. He firll difTolved too grains of camphor in an ounce of concentrated fulphuric acid. The camphor firft difTolved, without producing mucli change of colour. In a little time it became brown, and ultimately black. During this cliange, fulphurous acid gas was dilengaged. After two days, during which time the alembic had not been heated, the difengagement of gas dimi- nifhed, and the veflel was placed in a moderately liealed fand- bath. This increafed the aftion. At the end of two days, fix ounces of cold water were added ; the liquid ciianged to a reddifli-brown colour ; the difengagement of gas ceal'ed, and was fucceeded by a fmell refembling a mixture of tlie oils of lavender and peppermint. By gradual diftillation, the water came over impregnated ftrongly with the above odour, and accompanied by an cffential oil, which weighed tlnee grains. When the whole water had come over, two ounces more were added. The fmell before mentioned did not return, and the evaporation was continued to drynefs. The blackifli- brown refiduum was not afted upon by water, but by feveral digeftions with alcohol, leaving behind a compaft coaly re- fiduum, which, when dried and heated to a red heat in a clofe vefTel, weighed 53 grains. The alcohol was then drawn ofT from tlie folution by diftillation in a water-bath, leaving a blackifli-brown mat's, of the appearance of a gum refin, and the fmell of calomel. Its weight was 49 grains. The whole of this therefore confifted of The effential oil above-mentioned - - - . - 3 A compaft hard coal in fmall fragments - - J3 And the b lac kifti -brown mafs above-mentioned - 49 105 •This increafe 'of five grains Mr. Hatchett attributes lo the oxygen united to the carbon by the acid, or the water combined with the blackifh -brown fubftance. This latter fubftance had the following properties : 1. It had an aftringent tafte, and when difTolved in cold water, formed a d;u-k-brown folution. 2. It yielded a dark-brown precipitate with fulphate of iron, acetite of lead, muriate of tin, and nitrate of lime. 3. It precipated gold in its metallic ftate. 4. It formed fo complete a precipitate with a folution of ifinglafs, thatthe liquid became colourlcfs as water. The precipitate was nearly black, and was, hke the other compounds of tannin and gelatine, infoluble in hot water. Mr. Hatchett obferves that although this fubftance pof- feffcs the general charafter of that obtained by the nitric acid with charcoal, yet it feems to aft lefs powerfully upon Ikin. The precipitate, at the time of its formation, is more floc- culent and lefs tenacious than that produced by the other procefs. Mr. Hatchett fuppofes this difference may arife from the want of azote, which feems to exift in that produced by nitric acid and charcoal. He afcertained this by fubjefting to analyfis a portion which had been prepared from vegetable charcoal. He ex- pofed in a retort fome of this tannin in the dry ftate, to the heat of a lamp connefted with a jar, to obtain the gafeouB produft. Firft a fmall quantity of water rofe ; thin a little niuic acid, which had not been expelled in th-- evaporation. Next a fmall quantity of yellowilh liquor, whicli fta.:.ed the neck of the retort. Tlie fire was liien raifed, when a quantity of gas was explofively d^fengaged, and upfet the jar. This gas he judged from the fmcllto be ammonia. He .illo obfcrved TANNIN. obffrvcd fome wliitc fumes, which ri'fuhed from the nitric acid uniting with the ammonia. On replacing the jar, he continued the procefs. The future gas which came over was carbonic acid, and a little of another, which he fuppofed to be nitrogen. Although the artificial tannin appears in almoft every re- fpeft fimilar to the natural tannin, it might be expefted that eacli would have been fimilarly affected by nitric acid, yet Mr. Hatchctt found that the one was dellruftible by that acid, while the other was not in the lead affected by it/ He frequently diftillcd nitric acid from the artificial tannin, without producing any change upon it. The fame acid being added to infufion of galls, fumach, Pegu cutch, and kafcutti, completely deftroyed the tannin. The common catechu and oak bark treated in the fame way, had not the whole of their tannin deftroyed. He then made infufions of equal ftrength of nutgalls, ■ fumach, fhavings of oak wood, oak bark, and the artificial tainiitig fubftances. To half an ounce of each of thcfe, one drachm in meafure of ftrong nitric acid was added. The tannin of all were deftroyed, with the exception of the oak bark and the ar- tificial tannin. Mr. Hatchett obferves that the tannin of thofe bodies containing much mucilage is the moft hable to dcftruftion by the nitric acid ; and that in the cafes where the tannin is deftroyed, the oxalic acid is moftly formed. The oak bark and the common catechu contain little or no mucilage, and hence have lefs of their tannin deftroyed. Thefe fafts feem to prove that pure tannin, unmixed with otlier matter, is not affefted by nitric acid, and that in thofe inftances in which it is deftroyed, the effeft muft arife from fome new fubftance being formed by the aftion of the acid upon the extraneous matter, and alfo that mucilage contri- butes the moft to this change. Mr. Hatchett has not given us any precife analyfis of this fubftance, but concludes, from its formation, that it has car- bon for its bafe'. From the circumftance of its being formed with greater facility when the nitric acid is diluted, he thinks that the water is decompofed, and that the hydrogen enters into its conipofition. In the cafe of its decompofition by heat, the formation »>f ammonia led him to believe that azote was alfo one of its elements. This, however, does not agree with the faft of its being formed with fulphuric acid and vegetable matter only. Al- though this objeftion feems partly to be removed by the cir- cumilance of the tannin from fulphuric acidteing different in fome of its properties from that produced from the nitric acid and charcoal, it may, however, be here obferved that the natural tannin, which is not known to contain azote, more nearly refemblcs that formed with nitric acid, than that from the fulphuric acid. It does not appear probable that azote is a component part, even of the natural tannin. The ammonia which Mr. Hatcliett obtained might be in combination with the tannin, and may perhaps always be formed when the tannin is formed. Tile circumftance of the tannin not being changed by re- peatedly digefting it with nitric acid, would feem to favour the idea of its confifting of carbon and oxygen only. The importance of this fubftance in the art of tanning, ought to be a fufficient ftimulus to future experiments. If in the procefs of forming artificial tannin, the nitric acid is decompofed merely into nitrous gas, it might be pratticable to bring it back to its original ftate by the oxy- gen of the atmofphere only, and thus produce a valuable produft, which is now obtained at confiderable expence from certain vegetables. . The following table flievvs the proportions prcfent of na- tural tannin in a variety of fubftances. Catechu from Bombay Bengal Aleppo nutgalh Sumach - - - Souchong ti.a Green tea Leiccfterfhire willow baik Oak bark Spaiiifti chefnut bark Elm bark Common willow bark 54-5 48.5 26 18 1 1 9.2 7.5 6.6 5 ■ 3 2.5 in the Philofophical Mr. Biggin alfo has publifticd Tranfaftions for 1799, the rcfult of fome experiments on the proportions of tannin in various kinds of bark, which nearly correfponds with the preceding flatement, as will be feen by the following table, in which the maximum of the tanning principle is luppofed to be 20. Tanning Principle. By lilt Weight Hyilroineter. ill Grains. Elm - - - - 2.1 28 Oak (cut in winter) 2.1 30 Horfe chefnut 2.2 30 Beech 2.4 31 Willow (boughs) 2.4 31 Elder 3-0 41 Plum-tree - . - 4.0 58 Willow (trunk) 4.0 52 Sycamore . . - 4.1 53 Birch 4.1 54 Cherry-tree 4.2 59 Sallow ... 4.6 59 Mountain afti - - 4.7 60 Poplar - 6.0 76 Hazel - ■- - 6.3 !•} Afh - 6.6 82 Spanifli chefnut 9.0 98 Smooth oak 9.2 104 Oak (cut in fpring) - 9.6 108 Huntingdon or Leieefter willow lo.i 109 . Sumach .... 16.2 158 It appears from this table that fimilar barks, when taken from trees at different feafons of the year, differ as to the quantities of tannin contained in them. In the winter they contain the leaft, and in the fpring (which is the ufual time of felling oak -timber), if the feafon is very cold and un- genial, the quantity is diminifhed. This is well known to praftical men, as likewife that all barks contain the greatefl proportion of tannin ; at the time when the buds of the trees begin to germinate. It is found by experience that, on an average, four or five pounds of good oak bark are required to form one pound of leather. Sir Humphrey Davy obferves that the aftringent princi- ples in barks vary cbnfiderably, according as their age and fize are different. That in every aftringent bark, the in- terior white bark (which is the part next to the alburnum) contains the largefl quantity of tannin. The proportion of extraftive matter is generally greateft in the middle ; but the epidermis feldom furnifties either^ tannin or extraftive matter. The white cortical layers are, comparatively, moll abundant in young trees ; and hence their barks contain, in the fame weight, a larger proportion of tannin than the 7 ' barks TAiNNING. barks of okl trees. (Pliil. Traiif. 1803, p. 264.) From thefe obfervatioiis, founded 011 cxpcrimeiils, Mr. Hatchctt infers that, there is an intimate coinieftion between the form- ation of new wood and the formation of tannin in fuch ve- getables as afford the latter ; and this idea is corroborated by the chemical nature of thofe fubitances. It has been fuggcfted that the extraftive matter found in barks, or in lubRances ufed in tanning, affetts t0 inhabitants. It has been much celebrated for its coftly marble and excellent wine. The an- -ient Tauromenium was much more extenfive than the pre- fcnt town, and comprehended within its walU the town of the promontory of St. Andrew, where was a theatre placed between two high rocks, tmd commanding a full view both of jEtna and of tiie plains. This theatre is reckoned the moll beautiful monument of antiquity extant. A con- fiderable portion of this building has efcaped the ravages of time, and affords tiie antiquary, as well as the architect, an opportunity of examining that divifion of a theatre on which the adors ilood ; a part that is wanting in almoft all other ruined theatres. The arcades are all compofed of brick, the reft of the walls of pebbles, and covered with cafings of marble. The wliole range of the vomitoria and galleries that encircled the feats is yet Handing as high from the ground as the bottom of the fecond order ; the profcenium, which formed the ciiord of the arch, is almoft entire ; it is a thick wall, with a large opening in the centre, and three niches ; a fmall door, and a fourth niche on each fide ; be- tween each of thefe apertures, or recclfes, are marks in the wall, where columns were placed. According to the plan deduced from thefe ruins, the ftage was a parallelogram of 138 feet by 58 ; on each fide was a lofty fquare building, confifting of a bafement and .two upper ftories, from the higheil of which a communicating gallery was carried along the back fcenes : the diameter of the femicircular part of the theatre, where the audience fat, was 142 Englilh feet. The ftreets of the modern town, the courts and houfes, are every where interfpcrfed with fragments of antique walls, aquedufts, and mofaic pavements. The afcent to Taormina is very fteep and difficult ; but the charms of the landfcape amply recompenfe the labour of attaining the height. Every thing belonging to it is drawn in a large fublime ftyle ; the mountains tower to the clouds ; the caftles and ruins rife on weighty maftes of perpendicular rock, and feem to defy the attacks of mortal enemies ; ^tna, with all its fnowy and woody fwceps, fills half the horizon ; the fea is ftretched out upon an immenfe fcale, and occupies the remainder of the profpeft. The beach is confined by high cliffs, that are cal- careous and confining generally of a fpecies of red and white marble, which was in high efteem among the ancients. The houfes in the vicinity are inhabited by peafants, who occupy them with their children and cattle. Thefe feveral monu- ments are undoubtedly coeval with the Romans ; that is, pof- terior to Cifar, who, having expelled the inhabitants of Tauromenium, placed in it a Roman colony. The origin of this city is loft in the obfcurity of ages. It is known that it was confiderably augmented, when Dionyfius, in the 94th Olympiad, 443 years B.C., having taken and deftroyed Naxos, caufed it to be deferted by its inhabitants, who fettled here. This proud city was at length deftroyed by the Vene- tians, and fortified by the Norman conquerors ; and it ftill ex- ifts in a reduced ftate. When it was taken by the Saracens from the Greek emperor in the loth century, it was one of the ftrongeft places in the ifland, and called by them " Al Moezzia," which name it retained for a confiderable time ; 27 miles S,S,W- of Meffina. N. lat. 37° 51'. E. long. 15° 23'. TAOS Lapis, the peatock-Jione, a name given by fome of the ancient writers to a very beautiful variegated agate, refembling, in fome degree, the great variety of colours in the peacock's tail. TAOSANLU, in Geography, a town of Afiatic Turkey, in Natolia ; 20 miles N.W. of Kiutaja. 10 TAP TAOUKA, one of the Society iflands, in the South Pa- cific ocean. S. lat. 14° 30'. W. long. 145° 9'. TAP, among Hunters. A hare is faid to tap, or beat, when fhe makes a particular noife at rutting-time. Tap. See Tapping. Tav-RooI, that fort of root which (hoots direftly down- wards to a great depth. There are many roots of this na- ture, which are in conftant ufe by the farmer, fuch as the carrot, parfnip, beet, &c. ; and there are many plants of the tree kind which have tap-roots, as the oak, &c. See- Tapping. In the vegetable kinds of tap-rooted plants, they all re- quire a deeply broken-down and prepared foil, in order to grow them with any fuccefs, and to any confiderable fizes. And, as in the tree forts, they muft always rife from the feeds where they are fown ; as they cannot be tranfplanted out with any kind of propriety or advantage. Where the land is not properly prepared to a fuitable depth, they are ufually ftiort, forked, and of aukvvard growth ; and when raifed by tranfplanting, very fmall and ftunted ; but fome of them cannot be at all grown in the laft method. T AP-Rooti-cJ Turnip, in Agriculture, that fort which gjrows much with this kind of root. It is not a favourable kind of growth for this fort of crop. See Turnip. TAPACRI, in Geography, a town of Peru; 20 miles N.E. of Cochabamba. TAPAJOS, a river of Brazil, in the Capitania of Matto GrofTo, which runs N. between the Madeira and the Chingu for 300 leagues, flowing into the Amazons, in lat. 2° 24' 50" and long. 55°, the geographical pofition of the town of Santarem fituated at its mouth. This river rifes in the plains of the Paresis, fo called from an Indian nation wliich inhabits them. From thefe elevated plains defcend the two greateft rivers of South America, iiiz. the Para- guay, and the Madeira, the largeft river that flows into the Amazons on the fouth. The Tapajos flows in a contrary dircftion from thefe mountains. Its weftenmioft branch is the river Arinos, which entwines its fources with thofe of the Cuiaba at a fhort diftance from thofe of the Paraguay. The largeft and wefternmoft branch of the Tapajos is the Juruena, which rifes in lat. 14° 20', 20 leagues N.N.E. of Villa Bella, and running N. 120 leagues, flows into the Arinos, and with it forms the bed of the Tapajos. The Juruena may be navigated to its upper fall, within two leagues of its own fource. From the geographical pofition of the Tapajos, it is evident that this river facilitates naviga- tion and commerce from the maritime city of Peru to the mines of Matto Groflb and Cuiaba, by means of its large branches, the Juruena and Arinos. The Tapajos is known to be auriferous through a great part of its courfe. TAPANA, a name of the Hindoo regent of the fun. It means the inflamer. (See Surya.) One of the five ar- rows with which the Hindoo Kama, or cupid, wounds his votaries, is named Tapana. Its head is formed of a flower of a fuppofed inflaming quaUty. TAPARICA, in Geography, an ifland at the entrance of All Saints' bay, on the coaft of Brafil, about 25 miles long, and 5 broad. S. lat. 13*^. TAP AS, the name of a fpecies of devotion, to which great merit and efficacy are afcribed by the Hindoos. It confifts of intenfe contemplation, accompanied by aullerities. See Jap. The performance of the Tapas, or, more correAly writ- ten, Tapafya, is ftrongly recommended in Hindoo books ; and numerous inftances are there given of benefits conferred on the fuppliants by the gods fo propitiated. An individual, while in the performance of the penances of Tapafya, is called TAP called Tapafwi : he is much revered, and liis prayci-s are earneftly folicited by the fuperftitious as neceflfarily efficacious. (See Ravena.) Among his aufterities he went through the following feries, each of the eleven fpeciiic mortifica- tions enduring one hundred years. I. He Hood on one foot, Iiolding the other and both hands up toward heaven, with his eyes fixed on the fun. 2. He flood on one great toe. 3. He took as fuftenance nothing but water. 4. He lived fimilarly on air. 5. He remained in the water. 6. He was buried in the earth, but continued, as in the other inflexions, in inccfTant adoration. 7. The fame in lire. 8. He Hood on his head, with his feet upwards. 9. He flood on one hand. 10. He hung by his hands on a tree. 11. He hung on a tree with iiis head downwards. Some of the Puranas, or books of divine authority, con- tain a feries of eighteen fpecific mortifications. One is now lying before iis, and we give their denominations, with fome explanatory obfervations. I. T'hcdfftr, is an elevation of the head, as the word de- notes, during life : in this penance fome devotees profefs never to fit. 2. Akas-muiii : this means etherial contempla- tion : the afpirant in this cafe looks conflantly on the heavens. 3. Med' ha-miim, indicates felf-examination : the arms are ufu- ally croffed over the breall, and the penitent preferves a thoughtful pofture or gait, with downcafl looks. 4. Pherfa- bahu, with arms projedled horizontally. 5. Dhami-paiia, inverfion ; by fufpenfion on a tree, &c. head downwards, over a fire. 6. Patala-muni: this is the reverfe of Akas- muni, meaning fubterrene contemplation ; Patala being the name of the lower regions, and Yama the lord thereof. The Patala-muni conflantly looks downwards to the earth. 7. Mum, preferving continued filence in aid of abftraftion. The word means a wife man, a fage, or faint, as well as wifdom and contemplation. We know of no difference be- tween this fpecies of devotion and that called Jap, which fee. 8. Chouraft-afin : the meaning of this compound word is eighty-four fitting pofitions ; but it may have fome other more myflerious and lefs obvious meaning. It would feem to be the reverfe of fome other penances, the merit of whicli confifl in preferving one pollure ; whereas this imphes an in- ceflant variation to the extent of eighty-four changes. 9. K off all : the Areka or betle-nut penance. This con- fiHs in Handing foles upwards, the head relling on the nut placed on the ground. This is done at flated times ; but cannot, one wovdd think, be long continued. 10. Patal't, the earthly or fubterrene penance. This is defcribed to be a partial burying of the body up to the breait, head down- wards, and of courfe under ground, with the feet in the air, as in the lafl. One can fcarcely fee at firfl how this can be done ; but probably the earth is placed very loofely about the head, &c. with the body or legs fupported againft a tree or wall. II. Urd'ha-bahu, with elevated hands, keeping them above the head. This is a common penance, perfevered in fometimes till the arms become mere flr twelve times, till the tapers be brought to the required dimenfions. The firft call only foaks the wick, the fecond begins to cover it, ajid the reft give it the form and thick- neis ; in order to which, they take care that every caft, after the fourth, be made lower and lower below the wicks to make them taper. The tapers, thus formed, are laid, while yet hot, one againft another, in a feather-bed, folded double, to preferve them foft ; and afterwards taken out thence, one after another, to be rolled on a long fmooth table, witli an oblong inllrumcnt of box, polifhed at the bottom, and fur- nifhed with a handle above. The taper thus rolled and polifhed, a piece of its larger end is cut off, and a conical hole bored in it, with a boxen inftrument, into which the pin or point of the candleftick is to be received. While the broach is yet in the hole, they ufe to ttamp the maker's name and the weight of the taper, with a boxen ruler, on which proper charaifters are cut. The taper is theu Iiung up to harden, after which it is fit for ufe. Making of Tapers by Hand — The wicks being difpofed, as in the former manner, they begin to foften the wax, by working it in hot water, in a narrow, deep, copper veffel. They then take a quantity of this wax out with the hand, and apply it gradually on the wick, which is faftened to a hook in the wall, at the end oppofite to the collet ; fo that they begin to form the taper by the lai'ge end, and proceed, ftill leffening the thicknefs to the neck or collet. The reft is performed after the fame manner as in tapers m.ide with the ladle, except that they do not lay them in the feather-bed, but roll them on the table as faft as they are formed. Two things there are to be obferved in the two kinds of tapers ; the firft, that, in the whole procefs of tapers with the ladle, t\\ej ufe water to moiilen the table, and other inftruments ufed therein, that the wax may not ftick ; and that, in the other, they ufe oil of olives, or lard, for the fame end. Tapeu, Pajchal, among the Romanijls, is a large taper, on which the deacon apphes five bits of frankincenfe, in holes made for the purpofe, in form of a crofs ; and which he lights with new fire in the ceremony of Eafter- Saturday. The Pontifical makes pope Zofimus the author of this ufage ; but Baronius will have it more ancient ; and quotes a h)rmn of Prudentius to prove it. That pope he fuppofes to have only eftabliftied the ufe of it in parifh- churches, which till then had been reftrained to greater churches. F. Papebroch explains the original of the pafchal taper more diftinCtlyin his"ConatusChronico-Hiftoricus,"&c. It feems that, though the council of Nice regulated the day on wliich Eafter was to be celebrated, the patriarch of Alexan- dria was enjoined to make a yearly canon of it, and to fend it to the pope. As all the other moveable feafts were to be regu- lated by that of Eafter, a catalogue of them was made every year ; and this was written on a taper, cereus, which was "■lefTed in the church with much folemnity. This taper, according to the abbot Chaftelain, was not a wax -candle made to be burnt ; it had no wick, nor was it any thing more than a kind of column of wax, made on pur- pofe to write the lift of moveable feafts on ; and which would fufficc to hold that lift for the fpace of a year. For, among the ancients, when any tiling was to be TAP they came to write the moveable feafts on paper, but they ftiU faftened it to the pafchal taper ; which pradice waa ob- ferved for a long time at Notre Dame, in Rouen, a;id through- out the order of Cluny. Such is the original of the benedic- tion of the pafchal taper. TAPER A, in Ornithology, a fpccies of fwallow. Sei- HiRUNDO. T.APERA dos Bocas, in Geography, a town of Brafd, in ihf govtrninent of Para, on the Guanapu ; 90 miles S.W. of Para. TAPERI, a town of Peru ; 16 miles N.E. of Cocha. TAPESTRY, or'TAPlSTRV, a curious kind of nianu- fa the woof of the tapeftry. The comb or reed is of wood or ivory ; it has ufually teeth on both fides ; it is about an inch thick in the middle, but diminillies each way to thi- ex- tremity of the teeth : it ferves to beat th<- threads of the woot clofe to each otlier, as faft as the workman lias pafted and placed them with his flute among tiie threads of tiie warp. The workman is feated on a bench before tiie loom, with his breaft againft th<- beam, only a eiilhion or pilloW between them ; and, in this pofture, feparating, with his fingers, the threads of the warp, that he may fee the defign under- neath, and taking a flute, mounted with a proper colour, he pafl'ea it among the tlireads, after having raifed or lowered them, by means of the treddles moving the fpring- ftaves and coats. Laftly, To prefs and clofe the threads of the filk or yarn, &c. thus placed, he ftrikes each courfe (/'. e. what the flute leaves in its paffing and coming back again) with the reed. What is very remarkable in the manufafture of the low warp, is, that it is all wrought on the wrong fide ; fo that the workman cannot fee the right fide of his tapeftry, till the piece be finiftted and taken out of the loom. M. Le Blon, in endeavouring to 'iw the true harmony of colouring in painting, found that all vifible objefts may be reprefented by the three primitive colours, red, yellow, and blue ; becaufe out of thefe, all others, even black itfelf, may be compounded. From the principle of producing any vifible objeft with a fmall number of colours, and from obferving the com- pounded colours wliich were reflected from two pieces of filk of different colours, placed near to one another, he arrived at the fliill of producing in the loom all that the art of paint- ing requires. In weaving, indeed, he hath been obliged to make ufe of white and black threads, befides red, yellow, and blue ; and tliough he found that he was able to imitate any pifture with thefe five colours, yet for cheapnefg and expedition, and to add a brightnefs where it was required, he found it more convenient to make ufe of feveral inter- mediate degrees of colours. In his new way of weaving tapeftry in the loom with a draw-boy, it may be performed almoft as expeditioufly as fine brocades ; for when the loom is once fet and mounted, any common draught-weaver, unacquainted with drawing or painting, and indeed hardly knowing what figure he is about, may exaftly produce what the painter hath reprefented in the original pattern : and thus a piece of tapeftry may be woven ni a month or two, which, in the common way of working, would take up feveral years \ and what in the common way cofts a thoufand pounds, may, by tliis mcana, be afforded f-ner and better for a hundred. The main fecret of this confills in drawiiig the patterns, from which any cominon draught-weaver can mount the loom ; and when that is done, llie piece may be made of any fize, by only widening the reeds and the warp : and a re- verfe may be made with the fame cafe ; wliich is done by the boy's puOing the lafties up again in the fame order in which he pulled them down before : by which contrivance the tapeftry may be fuited to any room, whether the light comes in on the right, or on tiie left. The patterns are painted upon paper, on which are printed fquores from copper, plates, and thefe fubdiN-ided by as many lines aa anfwer to the threads of the warp, which run lengthwife ot the piece ; then they try how m.any threads of the {hoot anfwer in breadtk to every fubdiyifion of the fquwes. Every tiircad N » ot TAPESTRY. of the warp goe» tliroujrh a liiiall biafs riiij; called a male, or through a loop in the kifli, and hath a final! long weight or hngoe hung below, to counterbalance the packthreads, wluch goin| from Uie top of the rings or loops, are palTed over the pidlies in tlie table diredly over the loom, and are continued nearly in an horizontal pofilion on one fide of the loom to a convenient dillance ; where they are all fpread on a crofs piece fallcned to two ftaples : thefe are called the tail of tk' mountun- ; and from each of thefe packthreads, juft by the fide of the loom, arc faftened other packthreads, called /;«/>/«, which defcend to the ground; fo that by pulling thefe fimple cords, you raife any of the threads of the warp at pleafure : wherefore they fatten a loop or pot- lart to as many of thefe fimple cords as there are threads of the warp to be pulled up at every (hoot, or every throw of the (huttlc ; by which means the (hoot (hews itfelf on the right fide, where the warp is pulled up : and in ordering this, they are guided by the pattern, on which they count the difta'nces of the fubdivifions, which contain the fame colours in the fame line, and can be (hot at once : then they fallen potlarls to the feveral fimple cords that draw up the rings, through which thofe threads of the warp run, which are to lie behind this colour ; they tie all thefe loops to- gether, and fatten a piece of worfted or filk to the knot, of the fame colour that the workman is to thro\v ; and the boy, when he pulls each loop, names the colour, that the weaver may take the proper (huttle, and fo on for every colour to be thrown. Phil. Tranf. abr. vol. vi. p. 469, See. In conneftion with this fubjeft, we are naturally led to give a brief account of the manufadure of carpets. This is faid to have been introduced into France from Perfia, in the reign of Henry IV., where it has been dittinguiihed by ex- traordinary encouragement. The moft confiderablc manu- faftory of this kind was that of Chaillot, or the royal manu- factory of La Savoniere, or the Soap-houfe, about a league from Paris. This manufafturc was altogether of wool, and worked in the manner of velvet. AU forts of figures of animals may be imitated in this work, but fruits and flowers anfwer beft ; and it is moft fuccefsfully applied to the manu- fadure of carpets and all forts of fcreens. The carpets are, in fome refpeft, wrought by the upright way of tapeftry. The two rollers are placed the fame way : the warp is braced from the top downward ; the chain, with its loops, keeps all the threads of the warp equally per- pendicular ; the ftick, which facilitates their croffmg, runs through them in the fame manner, and feparates the fore- moft threads from the reft ; the lizier-pole holds all the firings, which ferve to draw the fore-threads in their turns, and then the oppofite threads, in order to infert the fpindles of wool. But the method of working in this manufactory differs from the upright way of tapeftry in the following particulars. The warp is divided, both before and behind, into parcels of ten threads, nine white and one blue ; which is regularly continued through the whole width of the piece. The weaver works on the fore -fide, and confcquently fees what he docs. The defign or pattern is traced in its proper colours on cartons, tied about the workman, who looks at it every moment, becaufe every ftitch is marked upon it, as it ought to be in his work. By this means he always knows what colours and (hades he is to ufe, and how many ftitches of the fame colour. In this he is affitted by fquares, into which the whole defign is divided ; each fquare is fubdivided into ten vertical lines, correfponding with each parcel of ten threads of the warp ; and befides, each fquare is ruled with ten horizontal fines, croffmg the vertical lines at right angles. The woik/nan having placed his fpindles of thread near him, begins to work on the firll horizontal line of one of the fquares. Thefe lines marked on the carton are not traced on the warp, for this would be endlefs ; becaufe an iron- wire, which is longer than the width of a parcel of ten threads, fupplies the place of a crofs Une. This wire is managed by a crook at one end, at the workman's right hand ; towards the other end it is flatted into a fort of knife, with a back and edge, and grows wider to the point. The workman fixes his iron wire, or rod, horizontally on the warp, by twitting fome turns of a fuitable thread of the woof round it, which he paifes forward and backward, be- hind a fore-thread of the warp, and then behind the oppofite thread, drawing them in their turn by their leilhes. After- wards, if it be neceffary, he brings his (voof-throad round the wire, in order to begin again to thruft it into the v^'arp. He continues in this manner to cover the iron rod or wire, and to fill up a fine to the tenth thread of the warp, which is the blue one. He is at hberty either to ftop here, or go on with the fame crofs line in the next divifion. According as he pafTes the thread of the woof round the iron wire, and into the warp, the threads of which he caufes to crofs one another at every inttant ; wheu he comes to the end of the line, he takes care to ftrike iu, or clofe again all the ftitches with an iron reed, whofe teeth freely enter between the empty threads of the warp, and which is heavy enough to ttrike in the woof he has ufed. This row of ftitches is again clofed and levelled, by a dweet of blue thread doubled, which the workman puts into the warp, Aiding his hand over the whole length of line he has wrought. He crofles the fame threads of the warp, and then ftretches through them another fingle blue thread. He beats in thefe two threads, one after another, with his reed ; thefe dweets of crofs thread, which are a fupport to each line, will be hid by the pile on the fore-fide, and they indeed diminifh the beautv of the wrong fide ; but this is of no coniequence. This done, the workman draws the iron rod or knife out of the loops of the woof that covered it ; and as it is wider to- wards its end, thefe loops refift its pafTage ; but being edged at its fore part, it cuts them through. Then the workman witf: his left hand lays a ftrong pair of (liears alCng the fini(hed fine, cuts off the loofe hairs, and thus forms a row of tufts perfectly even, which, together with thofe before and after it, form the (hag. One line of this fort comprehend- ing the row of ftitches and woollen pile, with the two blue threads which fupport them, fomewhat furpafs in thickncfs the fpace between the firft and fecond crofs line of a fquare. By this means the workman always fees what he is doing. He follows, ftitch for ftitch and colour for colour, the plan of his pattern which he is at, and paints magnificently, with- out having the leaft notion of painting or drawing. The manufacture of carpets, after the manner of Chaillot, was introduced into London in the year 1750, by two workmen who left the manufaftory in difguft, and came here to procure employment. They were encouraged and furnifhed with materials by Mr. Moore, to whofe alTiduity and zeal the eftabUfhment of this fort of manufacture has been princi{>ally owing. However, thefe men afterwards connected themfelves wath a Mr. Peter Parifot, \vl\o, under the patronage, and by means of the pecuniary afGitance of his royal highnefs the duke of Cumberland, piu-fued the manufacture of a carpet already begim at Paddington. This undertaking was foon removed to Fulham, and, under the munificence of the duke, promifed to be durable and advantageous. In 1752, Parifot, the undertaker, propofed a plan of fubfcription, the nature of which it is now needlefs to recite ; as the whole fcheme, as far as he was concerned io it, foon came to nothing. But Mr. Moore, being pro- vided T A i» vided with the nfccflary materials, and fngagiiifr proper workmen, and rifking a very confidcrablc cxpeiice, fuc- ceeded in eftablifhing this important and idcful manufafture, infomuch that, in 1757, he obtained a premium from the Society of Arts, &c. for the bed carpet in imitation of the Turkey carpets ; and by his ingenuity and porfeverance in bringing this manufafture to perfedion, it is nou- arrived at a very high degree of reputation. Mr. Whitby and Mr. Paflfavant were alfo lionoured with premiums for carpets of their manufafture by the Society of Arts in 1757 and 1758. We have alfo manufaftorics for carpets that are much efteemed at Axminller and Wil- ton ; not to mention thofe of Kidderminiler and other places. TAPETI, in Zoology, the name of an animal common in the Weft Indies, and called by fome cumruliis Americanus, the American rabbit. In the Linnsean fyftem, this animal is a fpecies of hare, or lepus Brafillenjis. (See Lepus.) It lias large ears like the common hare ; a white ring round the neck, though fome have not this ring ; the face of a rcddilh colour ; the chin white, the eyes black ; colour of the body like that of the common hare, but darker ; the body whitilh, without a tail. Thefe animals inhabit Brafil, live in woods, do not burrow, are very prolific, and afford good meat. The tapeti is found alfo in Mexico, where it is called citli. Pennant. TAPHICESIUS Lapis, a name given by Pliny and the ancients to a fpecies of jEtites, or eagle-ftone, found in a place of that name near Leucadia. TAPHNEUS, a word ufed by fome writers to exprefs r.ny thing when depurated or purified to the greateft degree, as the falts, by repeated folutions and cryftallizations, and the like. Paracelfus ufes it for a fpecies of earth, the things produced from which, he fays, never alter their nature by calcination or reverberation, or the hke operations. TAPHNIS, in Ancient Geography, a town of Egypt, mentioned by the prophet Jeremiah, to which he and the Ifraelites that were with him retired. TAPHRA, a town fituated in the ifthmus of the Tau- ric Cherfonefus, mentioned by Pliny and Strabo. TAPHROS, a name which was given to the ftrait that fepar;ites the idand of Sardinia from that of Corfica. TAPHRURA, orTAPHRA, a town of Africa Propria, upon the gulf of Numidia. TAPHUA, a town of Palefline, in the tribe of Juda. — Alfo, a town of Paleftine, which belonged to the tribe of Ephraim, and was fituated upon the frontier of that of ManafTeh. TAPIA, in Botany, an American name, adopted by Plumier from Pifo. See Crateva. Tapia, in Geography, a town of South America, in the kingdom of New Granada, and province of St. Martha. TAPIAN Point, a cape on the W. coaft of Mindanao. N. lat. 7°. E. long. 124° 30'. TAPIAU, a town of Pruflia, in Samland, on the Pregel ; 20 miles E.S.E. of Konigfberg. N. lat. 54° 36'. E. long. 21° 13'. TAPICURU, a river of Brafil, which runs into the fea, S, lat. 12° 20'. TA-PI-HOTUN, a town of Corea ; 690 miles E. of Peking. N. lat. 40° 20'. E. long. 125° 22'. TAPINOSIS, TxTiiv^^t.-, in Rhetoric, the fame with di- minution ; which fee. TAPION, Le, in Geography, a town on the W. coaft of Hifpaniola 5 10 miles E. of St. Marc. TAPIR, or Tapijerete of Marcgrave, in Zoology, the name of an animal found in fome parts of America, and T A P called by tlic Portuguefe anln, by others lianta, by Dainpier yache montagnarile, and by otiiers <'/rtn, m<\ fiu nrjualicui, and in the tenth edition of the Linna;an Syftem, hippopottimut ter- rejlris. Gmelin makes it a dillind genus ; and his generic charafters, amended by Dr. Shaw, are as follow ; front teeth in both jaws ten ; canine teeth in botii jaws lingle, incur- vated ; grinders in both jaws five on eacli fide, very broad ; feet witii three hoofs, and a falfe hoof on the fore-feet. This animal {Tapir Americanus) is of the fizc of a young calf, or iieifer, and in fhape fomewhat approaching to the figure of the liog, and the back arched ; its head is tiiicker than a hog's, and ends in a iharp ridge at top ; and the male has a fnout, or fort of probofcis, lianging over the opening of the moutli, in wliich he has a vi ry itrong mufcle, (erving to retraft it at pleafure ; the nofe of the female is deftitutc of the probofcis, (this circumftance is doubted by Sonnini,) and the jaws are of equal length; its eyes are fmall, and very hke thofe of the hog; its ears roundifh, bordered with white ; and thefe he can draw forward at pleafure ; its legs arc thick, and not longer than thofe of our hogs ; its fore- hoofs are divided into three portions ; and a lort of falfe hoof behind ; but its hind-hoofs into three ; its tail i* ver* fmall ; the (kin is hard and folid ; and the hair (liort, and of a pale brown, and when yoimg, variegated with white fpots ; and along the neck is a brillly mane, an inch and a half high. It lives in thick woods, on the eaftern fide of South Amenca, from the iithmusof Darien to the river of the Amazons ; and fleeps all day, but at night, or early in the morning, goes out for its prey : it feeds on vegetables, and is particularly fond of the ftalks of the fugar-cane ; it often takes the water, and fwims excellently : the natives, in places where it it common, eat its flefti, which is faid to be good : the In- dians (hoot it with poifoned arrows, and cut the /kin into bucklers. This animal is falacious, flow-footed, and (luggifti, and makes a kind of hilfing noife ; but perfectly harmkfs : the young are eafily tamed, and may be rendered domellic, which is laid to be the cafe in fome piu-ts of Guiana. When attacked by dogs, it makes a vigorous refiftance. The tapif produces but one young at a birth, of which it is very care- ful, leading it at an early age to the fea, and inftrufting it to fwim. Ray and Pennant. TAPIRIA, in Botany, .luft. 372, (lightly altered from the ftill more barbarous Tapirira, Aubl. Guian. 470. t. 188, which is itfelf an alteration of the Caribbean name Tupiriri, by which this tree is known in Guiana. See Jonquetia. TAPIR-TALA, in Geography, a town of Chinefc Tartary. N. lat. 43° 15'. E. long. 120° 39'. TAPIS. See Tunica. TAPE, in Geography. See Topel. TAPLAKEN, a town of Pruffia, in Samland, on the Pregel ; 24 miles E. of Konigfberg. TAPLEYS, a town of North Carolina ; 12 miles N.E. of Hillfborough. TAPLINGS, in the Engli/h Salt-Worts, Uie name giten to certain bars of iron which fupport the bottom of the pan in which the brine is boiled. Thefe pans are very large, and cover a wide furnace ; but as their width would make them apt to bend in the mid- dle, which would fpoil the working of the fait, there is a fort of wall of brick carried along the middle of the fur' nace, and on the top of this are placed thefe t^phngs : they are about eight inches high, and from four to fix in ihicknefs, being fmalleit at the top. Thefe are placed at about thre* feet diftance one from another, and the wall wiiich fupports them, and which is called the mid father, is broad at the bafe, and fo narrow at the top, as bwely W give room for ttte bafes of the tapUugt. TAPOA- T A 1' TAPOAMANAO, in Geography. See Sir Charles Saisueks'/ IJhnd. TAPO AN A, a river of Brafil, which runs into the fca, S. lat. 2 1^ lo'. TAPOCOROI, a river of Brafil, whicli runs into the fea, S. lat. 27". TAPOGOMEA, in Botany, from the Caribbean name of one of the fpecies, Tapogomo ; Aubl. Guian. 157. .luff. 208. Sec Cai.licocca. TAPOOKAS, in Geography, a town of the ftate of Georgia, on tlic Yazoo. N. lat. 35° 57'. W. long. TAPOOL, a fmall ifland m the Sooloo Archipelago. N. lat. 5' 37'. E. long. 120° 52'. TAPObR, a town of Hindooftan, in the Myforc ; 15 miles S.S.W. of Darampoory. — Alfo, a river of Hin- dooftan, which runs into the Cauvery, 4 miles N. of Cave- ripatam. TAPOSIRIS, in ylncient Geography, a town of Egypt, at fome dillance from the fea, between Cynofl'cma and Pin- thyna. — Alfo, another town, called Parva Tapofiris, on a tongue of land between the fea and the canal which pafled from Canopus to Alexandria. TAPPA, in Geography, one of the fmall Molucca iflands ; feparated by a narrow channel from Latalatta : on it is a fool of frefh water ; a little to the north of the line. ;. long. 127^ 5'. TAPPAHANOCK, a town of the United States of America, in Virginia, on a fmall river, which runs into the Rappalianock ; 43 miles N.E. of Richmond. N. lat. 57= 58'. W. long. 76^ 55'. TAPPALANG, a town on the weft coaft of the ifland of Celebes. S. lat. 2° 25'. E. long. 1 19° 5'. TAPPAN. See Oraxgk-town-. TAPPANOOLY, a fea-port town of the ifland of Su- matra, fituated on the weft coaft, in the country of Batta, on a fmall ifland called Punchongcacheeie. The bay is very deep, capable of containing the united navies of Eu- rope, and confifting of a number of harbours within one another. The bay ftretches into the heart of the Batta do- rninions, and its borders are inhabited by that people, who barter here the produce of their country for fuch articles as they want. The Englifli Eaft India company have a fac- tory here. N. lat. 1° 40'. E. long. 98° 12'. TAPPI, or Tai'I, called by the Moors Chedder, a river of Hindooftan, which, as Thevenot fays, has its fource ten miles from the little town of Brempore, in the kingdom and mountains of Deccan, and runs into the fea about z\ leagues below Sural. The Banians and Gentoos efteem this a very holy river. TAPPING, tiie aft of piercing a hole in a veffel, and applying a tube, or cannula, in the aperture, for the com- modious drawing off the liquors contained therein. Tapping, in Agriculture, is the making an incifion in the bark of a tree, and letting out the juice. To tap a tree at the root, is to open it round about the root. Ratray, the learned Scot, affirms, that he has found by experiment, that the liquor, which may be drawn from the birch-tree in the fpring-time, is equal to the whole weight of the tree, branches, roots, and all together. In the tapping of trees, the juice, taken in from the earth, afctaids from the root ; and, after it is concofted and affimilated in the branches, Ac. it defcends, Uke a hquor in ao alembic, to the orifice or incifion where it iflues out. One of the moft effeftual wayj of tapping, fo as to obtain the greateft quantity of fap in the Ihorteft time, is not only T A r to pierce the bark, or to cut the body of the tree almoft t» the pith, with a chiftel (as fome have direfted), but to bore it quite through all the circles, on both fides of tin- pith, leaving only the outermoft and the bark on the north-eaft fide unpierced. This hole is to be bored floping upwards, as large as the largeft auger will make ; and that alfo through and \nider a large arm near the ground. So will it not need any ftone to keep open tiie orifice, nor tap to direft the fap into the receiver. By this method the tree will, in a fliort time, afford liquor enough for brewing ; and with fome of this fweet fap, one bufliel of malt will make as good ale as four bufttels of malt with ordinary water. The large maple, which we call the fycamore, is faid to yield the beft brewing fap, its juice being very fweet and wholefome. See Betula. To preferve the Sap for Breiuing Infolate it by a conftant expofure to the fun in proper veflels, till the reft be gathered and ready, otherwife it \\ ill contraft an acidity ; when there is enougii, put into it as much very thin cut and hard-toafted rye-bread, as will ferve to ferment it ; and when it works, take out the bread, and bottle up the liquor. A few cloves in each veftel that receives the fap, as it oozes from the tree, will alfo, certainly, preferve it a twelvemonth. See Dr. Tonge's Obf. in the Philofophical Tranfaftions, W 43, 44. 46. 68. or Abr. vol. ii. p. 673, &c. Tapping of Oaklings and other Trees, the praftice of cutting off^ the tap-roots of young oaks and other trees or plants of that kind. It has been noticed by Mr. Nicol, in his work on planting, that thofe who are in favour of this method, rather tlian that of fowing the feeds of thefe forts of trees, fuppofe that tapping the downward roots of the young plants while they are in the nurfery plantation, has the power and capability of making their roots ever afterward have a horizontal ten- dency in the earth or foil ; that in confequence of it they are not liable to injury by infinuating themfelves downwards into bad foil ; and that by a plentiful planting of nurfing plants, to draw them upright, the neceflity of heading them down is prevented. But that thefe are correft and folid arguments, he thinks, it is much to be queftioned. No doubt, he fup- pofes, exifts that tapping is of infinite advantage to all tap- rooted plants of the tree kind, previous to their removal, fince it caufes them to put forth fibres on the upper part of the root, which they otherwife would not have done ; fitting them thereby for being tranfplanted into ftiallow foils, and for feeking pafturage for the fuftenance of the plants. But that the roots will, ever afterwards, have a horizontal ten- dency, may, it is believed, be fairly denied. Every plant, unlefs conftrained, it is maintained, will follow its own na- tural inchnations and habits of growth. Nor can all the art of man prevent a downward tendency in the roots of thefe forts of tree-plants, and at the fame time allow them depth of foil. See Tav-RooI. Tapping o/" Springs, the praftice of boring through the furface covering materiids of land with the auger, and letting oft" the hurtful water which is pent up, confined, and contained in the clayey bed or ftratum below. See SpRlNG-Z)ra/n. Tapping, a term applied to an operation which is fome- times performed on ftieep for removing a difeafe of the local dropfical kind in the head. It is executed either by means of a very large pin, or a trocar made for the purpofe. See Sturdy. Tapping, in Mechanics, a term applied to the making and ' reftifying of female fcrews by means of a tap, ;'. e. a Icrew prepared and referved for this purpofe. The procefs, which . J confift-s T A K ■-onfifts of various manipulations, is minutely dcfcribed in Nicholfon's Journal, vol. i. p. 160 — 163. See Sckew. Tapping, in Surgery. See Parackntesis. TAPPOOS, in Gfogrnphy, a town on the W. coall of Sumatra ; 25 miles N. of Tappanooly. TAPROBANA, orTAPRor.AXE, in Ancient Geography, J name anciently given to the illand of Ceylon ; which fee. TAPSAGUN, a town in the interior of Africa, and one of thofe wliich were fubjugated by Cornelius Balbus. TAPSAS, a river of Africa, which ran near the town of Ruficada. TAPSON, in Geography, a town of Thibet ; 50 miles E. of Tchontori. TAPSUS, or TllAP.sUS, in Ancient Geography, a penin- fula on the eaftcrn coail of Sicily, between Hybia parva and Syracufe — Alfo, a promontory of Africa, I 2 leagues E. of the promontory Tritum. This formed the caltern extremity ot the Sinus Nuraidicus. TAPTEE, in Geography, a river of Hindooftan, formed by the union of feveral fmaller rivers in the Candeilh country, which runs into the gulf of Cambay, about i 2 miles below Sural. See Tappi. TAP-TOO. See Tat-too. TAPUI-TAPERA, in Geography, a town of Brafil, on the coaR ; 15 miles N.W, of St. Luis de Marannon. TAPURA, in Botany, an unexplained name of Aublet's. See RoHRlA. Tapura, in Ancient Geography, a town of Afia, in the jnountains of Lefler Armenia. TAPURI, or Tapyri, a people of Afia, in Media. Tapuri Monies, mountains of Scythia, on this fide of mount Imaus. Ptolemy. TAPUYAS, in Geography, a river of Brafd, which runs into the river of the Amazons ; the banks of which are in- habited by Indians, independent of the Portuguefe. TAQUARI, a river of Brafil, having the largeft of its many mouths in the Paraguay, in lat. 19° 15', and long. 54°- TAR. See Pami.ico. Tar, or Tarr, a thick dark-brown or black refinous ad- hefive juice, iffuing from the wood and bark of old pines or isrs, either naturally, or by burning. See PiNUs. Some modern writers inform us, that tar flows from the trunks of pines and firs, when they are very old, through incifions made in the bark near the root ; that pitch is only tar infpiffated ; and both are the oil of the tree grown thick and black with age and the fun. The trees, like old men, being unable to perfpire, and the fecretory dufts obftrufted, they are, as one may fay, choaked and Huffed with their own juice. But the method ufed by our colonies in America of making tar and pitch, is, in effeur or five inches acrofs. The dry chips at the top of the furnace are then fet on fire, and the heat fpreads downwards, till the whole charge is fufficiently kindled. The chimney is then entirely clofed with a large flone, and wet earth is heaped on the flones at top, and thrown on wherever the fmoke is obferved to burfl out too flrongly. The melting then be- gins, and the tar falls to the bottom, fills the hollow of the floor (which detains any bits of wood and other impurities), and runs off through the gun-barrel into cafl the Pacific ocean, S. lat. 2cP lo'. TARAPILLY, a town of Hindooftan, in Coimbetore ; 20 miles N.E. of Damicotta. TARARE, a town of France, in the department of the Rhone and Loire ; i8 miles W.N.W. of Lyons. TARAS, in /Int'unl Geography, a fmall river of Italy, which pafFcd to Tarentum, and probably gave it its tiame. — Alfo, a river of Italy, in Japygia. — Alfo, a river of Epirus. — Alfo, a town of Afia Minor — Alfo, a river of Scythia. Tauas, iu Geography, a town of the duchy of Wurz- burg ; 2 miles N.W. of Hasfurt. TARASCO, in Am'fvt Geography, a town of Gallia Naibonnenfis, on the left of the Rhone, and weft of Are- late. TAR A SCON, in Geography, a town of Spain, in Nevf Caftile ; 22 milus S.W. of Huete. — Alfo, a town of France, and principal place of a diftrift, in the department of the Mo\iths of the Rhone, on the Rhone, with a caftle, fortified in th^ ancient manner. It is fituated oppofite Beaucaire, with which it communicates by means of a bridge of boats. The number of inhabitants is about 7000 ; 3 polls E. of Nifines. N. lat 43° 48'. E. long. 4'' 44' — Alfo, a city of France, and capital of the department of the Arriege, on the river Arriege. In it ai-e feveral manufactures of iron ; 48 miles S. of Toulo jfe. N. lat. 42'' 50'. E. long, i" 41'. TARASOVA, a town of Ruflia, in the government of IrkntiV, on the Lena; 12 miles 8. of Tutura. TARATATO, a town on the eaft coaft of Fortaven- tura, one of the Canary iflands. TARAUMARA, a large province of North America, in the north-eaft part of New Bifcay, bounded on the weft by Sonora, on the eaft by New Mexico, its limit being the Rio Bravo. On the fouth-weft it borders on Cinaloa. Alcedo computes the extent at 100 Spanifh leagues from eaft to weft, and as much from north to fouth. This pro- vince was difcovered in 1 614, and derives its name from a favage nation found there, of pacific difpofitions. This province contains 48 pueblos, or villages, or ftations of Francifcan miffionaries, exclufive of the capital of St. Fe- lippe de Chiguaga. It is chiefly rich in mines, the minerals being fmelted at the Real, or royal ftation of St. Eulalia, or probably the Real Nueva in the maps, in N. lat. 29° 36'. TARAXACUM, or Taraxacon, in Botany, a name ufed by the Arabians, fuppofed by Ambrofini to have been derived from the Greek r^toji/io?, eatable, becaufe the plant to which it was applied, (our Dandelion, or fomething nearly akin,) was ufed for food. De Theis derives it, with more appearance of probability, from Ta^ao-o-w, to move, or trouble, becaufe of the laxative and diuretic quality of the plant in queftion, commemorated in its vulgar Englifli, as well as French, appellation. See Leontodon ; at the end of which botanical article, we muft obferve, genus of Leon- todon is printed by miftake for gender. TARAXIPPUS, formed of TXi^xa-a-ii; Ifrighten,3ni Itv; horfe, a kind of evil genius, the ftatue of which was erefted in tlie Grecian hippodromes, in order to alarm and frighten the horfes in their courfe. The (hape and form of this ftrange deity are not defcribed ; but he certainly anfwered the end for which he was defigned : it frequently happening, that the horfes were fo feared at his appearance, as to turn away with the utmoft violence, and expofe the lives of their riders or drivers to the moft imminent danger. Many con- jectures have been formed concerning this ftrange deity, and the means he ufed to frighten the hor(es : but the moft pro- bablq TAR T A R bable conclufion will be, perhaps, to fuppofc that fome tricks and artifices were pradifed under the difguife of this figure, either witli a defign to render the viftory more ho- nourable in proportion to the difficulty of gaining it, or elfe that this horfe-frightening deity was placed in the courfe as a touch-ftone, to prove the refolution and temper of the horfes ; and to oblige the candidates to bring none into the field but fuch as by exercife and difcipline were fo affured and ftcady, as not to let their obedience be fliaken upon the moft trying occaiions. Berenger's Hiil. and Art of Horfe- manftiip, vol. i. p. 54. See Stadium. TARAXIS, from Tajacrirs., to (UJlurb, in Surgery, a flight ophthalmy, or inflammation of the eye. Sec Oi'ii- THALMY. TARAZ, in Geography, a river of Independent Tar- tary, which runs into the Sirr or Jaxartes at Otrur. Some fuppofe this to be the fame with the river Tulas ; but others reprefent it as a much more inconfiderable ftream. Taraz, or Turkejlan, a city of Afia, and capital of the country of Tu'-keftan, fituated on a fmall river which runs into the Sirr, 2J0 miles N. of Samarcand. N. lat. 44° 45'. E. long. 69° 42'. TARAZONA, a town of Spain, in New Caftile ; ly miles S. of Alarcon. — Alfo, a city of Spain, in Aragon, the fee of a bifhop, fuffragan of Saragofla. This town is ancient, and was deftroyed by the Moors in the year 724, and by the fame people rebuilt in the beginning of the 12th century ; 43 miles N.W. of Saragofla. N. lat. 42°. W. long, i' 43'. TARBA, in Ancient Geography, a town fituated on the fouthern coall of the i(le of Crete. TARBASON, a word ufed by fome chemical writers as a name of antimony. TARBASSUS, in Ancient Geography, a town of Afia, in Pifidia. TARBAT, in Geography, a town of Scotland, in the county of Cromarty. This parilh originally belonged to the county of Rofs, but was feparated from it and annexed to Cromarty, in 1693 ; 6 miles E. of Tam. Tarbat Ncfs, a cape of Scotland, on the cafl coaft of the county of Rofs, between the friths of Dornoch and Murray. N. lat. 37^ 5^'. W. long. 3'° 40'. TARBE, a city of France, and capital of the depart- ment of the Upper Pyrenees, built on the ruins of the an- cient Bigorre : before the revolution it was the fee of a bifhop, and refidence of a governor. It confifts principally of one flreet along the Adour, and is defended by a caftle ; 7i polls S. of Auch. N. lat. 43° 14'. E. long. 0° 8'. TARBELLI, in Ancient Geography, a people of Gaul, in Aquitania, whofe territory extended along the Aquitanic gulf. TARBE RT, in Geography, a poll -town of the county of Kerry, Ireland, on the river Shannon, where there is a charter-fchool. It is 1 24 miles S.W. from Dublin. There is alfo a fmall ifland of this name off the coaft of Galway. TARBIDO, or Marazzo, a river of Naples, which runs into the Mediterranean, 13 miles S.W. of Cofenza. TARBOU, a town of Hungary, on the river Theyfe ; 14 miles N.N.E. of Kifwarda. TARBURGH, or Tarborough, a town of North Carolina, on the Tar ; 45 miles N.N.W. of Newbern. N. lat. 35° 52'. W. long. 77° 44'. TARBUT, a city of Perfia, in KhorafTan, eight furfungs diftant from Turfhifh ; with a population of about 8000 perfons, defended by a llrong wall, and flanked with towers. Froviiions are here plentiful and cheap ; it has 220 dependent villages, nnd is poflefled by Ifa Khan, a powerful chief, who can bring into the field an army of 10,000 men. TARCHI, in Biography, a Neapolitan compofer, who arrived in England in 1786, at the fame time as Rubinelli. He was young at that time, but though he remained lierc only one fcafon, lie difcovered confiderable abilities, and feemed advancing rapidly into fame. He had tire, tafte, and invention. If lie lliU lives, we make no doubt but that he ranks high among the dramatic compofers of his country. TARCHONANTHUS, \n Botany, fo called from /ar- con, or taracon, the Arabic name of Artiniifm Dracunculus, our Taragon, and &.v9o , a fower, becaufe its flowers re- femble thofe of that plant. Vaillant contrived tliis name in the Mem. de I'Acad. des Sciences, for 1719, but it is not one of his happieft. — Linn. Gen. 416. Schreb. 547. Willd. Sp. PI. v. 3. 1792. Mart. Mill. Dia. V. 4. Ait. Hort. Kew. V. 4- Siy. JufT. 185. Lamarck Ilhiftr. t. 671. Gajrtn. t. 166. — Clafs and order, Syngemjla Polygamia-irqua- lis. Nat. Ord. Compojlta Nucamentacea, Linn. Corymbi' ferg, .lufl-. Gen. Ch. Common Calyx turbinate, of one leaf, cut half way down into (for the moft part) feven rather acute feg- ments, coloured internally, fhortcr than the corolla, perma- nent. Cor. compound, uniform, of about twenty florets, all perfeft, equal, each of one petal, funr.el-lhaped, with five teeth. Slam, in each floret. Filaments five, capillary, very fliort ; anthers united into a cyhndrical tube, as long as their own partial corolla, with a filamentous appendage at the bafe. Pift. in eacii floret, Germen inferior, oblong ; ftyle twice the length of the floret ; ftigmas two, divaricated. Peric. none, except the permanent calyx. Seeds fohtary, ovate -oblong, comprefTed. D jivn woolly, inveftnig every part of the feed. Recept. minute, clothed with woolly hairs, the length of the calyx. Obf. The JeeJ-etown is very remarkable, as not crowning but entirely mvefting tlie feed. Linnteus. Eft^. Cii. Receptacle villous. Seeds inverted with hairs. Common calyx of one leaf, turbinate, cut half way down into feveral fegments. Anthers fpurred at the bafe. 1. T. camphoratus. Shrubby African Fleabane, or Aro- matic Taragon-bloflom. Linn. Sp. PI. 1 179. Suppl. 361. Willd. n. I. Ait. n. i. (Elichryfo affinis africana arbo- refcens, floribus purpuro-violaceis, fohis Salvia?, odore Rof- marini ; Herm. Lugd.-Bat. 228. t. 229. Pluk. Phyt. t. 174. f. I.) — Leaves elliptic-oblong, n-arly entire ; denfely downy beneath. Native of the Cape of Good Hope, from whence it was brought very early into the gardens of Europe. This is a greenhoufe evergreen_yZ'rtti, or fmall tree, flowering from June to Oftober. The branch s are angular, tuberculated, denlely downy and hoary. Leaves fcattered, ftalked, two or tluee inches long, more or lefs acute, fomewhat wavy, entire or minutely toothed ; their upper fide of a dark dull green, quite fmooth, reticulated with fine veins ; the under white and cottony, with a prominent rib and veins. When bruifed they fmell like rofemary, but lefs agree.ibly. Pani- cles terminal, many-flowered, with numerous lanceolate braHcas, all together hoary, like the branches. Segments of the calyx from five to feven, or more. Florets dark dull purple, with whitifli anthers. Seeds enveloped in copious white wool, like thofe of an Eriocephai.U!j ; fee that article. 2. T. ellipticus. Oval-leaved Taragon-blofTom. Thunb. Prodr. 145. Willd. n. 2. — " Leaves elliptical, finely toothed ; denfely woolly beneath." — Gathered by Thunberg at the Cape. We have feen no authentic fpecimen from him, but there aro fome in the Linnsan herbarium which anfwer to the TAR the fpecific charafter, tliough they are obvioufly a mere va- riety of the foregoing^ 3. T. racemofus. CUifter-flowered Taragon-blotTom. Thunb. Prodr. 145 " Leaves elliptical, pointed, finely tootlied ; dcnfely woolly beneath." — From the fame country. This is perhaps but another variety. The leavss of T. cam- phoraluj vary in acutenefs. Willdenow feems accidentally to have omitted this in tranfcribing. It fhould have been his n. 3. 4. T. lanceolatus. Lanceolate Taragon-blofTom. Thunb. Prodr. 1 4 J. Willd. n. 4 " Leaves elliptical, entire, fmootli." — Gathered at the Cape by Thunberg. His fpe- cific name is exceptionable, when compared with the cha- rafters of this and the reft of the fpecics. We muft rely on him for the fynonyms of the following, it being his own difcovery ; or we (hould have prcfumed, without feeing fpecimens, that the plant before us might be T. glaber of Linnxus. 5. T. Jentatus. Toothed Taragon-bloflbm. Thunb. Prodr. 145. Willd. n. 5. (T. glaber; Linn. Suppl. 360, according to Thunberg. ) — i' Leaves oblong, Entire or toothed ; (lightly downy beneath." — Gathered by Thun- berg at the Cape. We have feen no fpecimen. Linnaeus defcribes his plant as extremely like T. camphoratus, but quite fmooth, and without any fmell. It varies with nar- rower or broader leaves, fometimes entire, fometimes toothed. 6. T. ericoiJes. Heath-like Taragon-bloffom. Lmn. Suppl. 360. Willd. n. 6. — Leaves oblong, fmooth, im- bricated in four rows. Calyx in four deep fegments Native of the Cape of Good Hope. A n^id Jljrub, with copious, round, irregulai- branches, whofe points fometimes taper into a fpinous point. Leaves like thofe of many Erica, minute, fcarcely a line in length, elliptic-oblong, ob- tufe, entire, concave, fmooth on both fides, dotted, aro- matic when rubbed, imbricated in four rows on the very Ihort, oppofite, lateral fhoots. Floiuers folitary at the end of thofe fhoots, each on a (hort filky ftalk. They are er- roneoufly termed " conferti" in the Supplement, being no otherwHfe crowded than becaufe the little branches which bear them are fo^ Calyx in four very deep, elliptical, fmooth, reddifh divifions, very aromatic. Florets few, mi- nute, concealed in the copious woolly hair, which is twice the length of the calyx. Linnxus juftly obferves of this laft fpecies, that its ge- nus is rather doubtful. We conceive it might as readily be fuppofed an Eriocephalus, and if the leaves could by any means be called filiform, we might guefs it to be E. glaber, Thunb. Prodr. 168, a fpecies not adopted in our account of that genus ; (where Lamarck Illuftr. t. 717, ought to have been quoted after Juff. 186.) The above conjefture is ftrengthened by Thunberg's having mentioned no Tarcho- nanthus ericoides, nor, as far as we can difcover, has he de- fcribed the (hrub in queftion under any other name. We beg leave to remark that the fpecies of this whole genus, except the original one, are involved in much uncertainty, nor are the materials with which we are furnifhed fufBcient to enable any botanift to form an opinion about them. Tauchonanthus, in Gardening, contains a plant of the flurubby evergreen exotic kind, of which the fpecies that is moft commonly cultivated is the (hrubby African fleabane, (T. camphoratus,) which has a ftrong woody ftem, that rifet to the height of twelve or fourteen feet, fending out many woody branches at the top, which may be trained to ? regular head. Method of Culture. — This is a plant that may be increafed TAR by cuttings, which (hould be planted out in the fpring or early fummer feafons, in pots filled with light mould, giving them fhade and water occafionally. They foon ftrike root, and in three or four months may be potted o(f into feparate pots, aflFording them (hade and water as before, and placing them under (belter. They alfo ftrike root in the fummer feafon, when planted in a common border, and covered with hand-glalFes, and may in thefe cafes be potted off in the autumn. Afterwards they require the management of other hardy greenhoufe plants. The plants do not produce ripe feeds in this climate. They afford variety in thefe different fituations. TARDA Avis, in Ornithology, a name given by many to the buftard, more commonly known among authors by the name otis. TARDETS, in Geography, a town of France, in the department of the Lower Pyrenees ; 6 miles S. of Mau- leon. TARDIGRADUS, or Sloth, in Zoology. See Bra- DYPUS. TARDO, in the Italian Mufic, is ufed to denote a flow movement, being much the fame as largo. TARDOIRE, or Tardouere, in Geography, a river of France, which runs into the Charente, near Rouchefou- cault. TARDOU, El, a town of Spain, in the province of Cordova ; z8 miles W. of Cordova. TARDSONG, a town of Thibet; 250 miles E. of Laff"a. N. lat. 29° 54'. E. long. 95° 34'. TARE, in Botany. See Vetch. Tare, in Agriculture, a well-known plant of the vetch kind, of which there are two forts ; the common purple- flowered fpring or fummer tare, and the purple-flowered wild or winter tare ; the latter of which fort is by much the hardieft. Numerous experiments in the culture of thefe different kinds of tares, were made by the Rev. Mr. Laurents, in order to afcertain their differences in hai'dinefs, for which we refer to the Correfted Agricultural Siu-vey of the County of Suffolk. It is evident from the tall, clofe, hardy growth and fuccu- lent quality of the winter tare, that it muft be a plant of much value to the farmer, as affording an abundant produce of green food for animals ; and by being alternated with thofe of the grain kind, in amehorating or preventing the exhauftion of the land that muft otherwife take place. It has been fuggefted by the writer of the Agricultural Survey of the County of Middlefex, that it may be the means of enabling the arable farmer to fupport as much live-ftock as the grazier, as while crops of this fort remain upon the ground, they afford larger fupplies of the beft kind of green food on the acre than the moll rich and fertile grafs lands ; and they may be taken from the ground at fo early a period in the fummer feafon, as on the friable loamy foils to admit of a clean crop of turnips, &c. being obtained from the fame land in the fame year ; and of thole of the more heavy kinds being prepared and fown with wheat. And while they are capable of being raifed with fuccefs on moft forts of foils and fituations, they fupport and fatten cattle and flieep of dif- ferent fizes and breeds in an expeditious manner. And further, they afford a good preparation for other forts of green crops, and in that way keep up the fucceflion of fuch forts of food for the fattening of additional numbers of animals, and in that manner afford abundance of manure in fituations where it could not otherwife be pi-oeured. Qn the TARE. the whole, he fuppofes, that by a judicious combination of this plant with thofe of turnips, clover, and fainfoin, the poor downs, (heep-walks, and other wafte lands may be rendered from ten to thirty times more valuable than they are in their prefent flate. The tare in all its varieties is a plant which, in refpeft to foil, according to the author of the Prefent State of Huf- bandry, admits of confiderablc latitude, growing without difficulty or trouble on all the varieties, from that of the thin gravelly, to thofe of the deep and tliff clayey kinds, but flourifhing in the moft vigorous and perfed manner on thofe of the gravelly, loamy defcriptions, that are not too moill or wet at particular feafons. . With regard to the preparation of the land for this fort of crop, there is lefs care neceffary than for many other kinds of gralTy forts of crops, as it will fucceed well where the foil has not been fo much broken down, or reduced into fine mould ; but it always grows in the moft perfeft and vigorous manner where a good degree of pulverization and finenefs has been produced in the land by proper tillage. But in common, two or three plough- ings, with occafional good harrowings in the intermediate times, may be fully fufficient for the purpofe, at whatever feafon the crop is to be put into the ground. As to the lowing of the feed of this crop, it has been obferved, that as the feed of the fpring tare docs not fuc- ceed well when fown for the winter crop, nor that of the winter kind when put in for the fummer produft, care fhould be taken to keep the feeds of the two forts as per- feftly diftinft as poffible. And that as they are, from their being both of nearly the fame colour and fize, as well as their agreeing in other particulars, extremely liable to be mixed in the feed-lhops, it may be the beft praftice for the cultivator to preferve his own feed, as by that means he may not only be certain of having the feed good in its quality, but of the right forts, and, of courfe, may depend more fully on his crops. And it has been fuggefted by the writer of the Middlefex Report on Agriculture, that fteeping the feed in dry feafons may be of utility in promoting the quick vegetation of the crop in many fituations of land and peculiarities of feafon. With regard to the quan- tity of feed that ihould oe employed, it fhould, of courfe, vary according to the nature of the foil, and the time as well as manner of fowing. But from two bulhels to two and a half are the proportions moft commonly recommended in the broad-caft method of fowing. But on poor forts of lartd, where the feed is fown late, and the climate is backward, three bufhels may not be too much. And it has been alfo obferved by a late writer, that where the crops are either to be cut for foihng, or to be fed down by live-ilock, the proportion of feed Ihould be confiderably increafed, as not only a greater produce is thereby provided, but the growth of the crops rendered more quick and full. In the drill method of fowing, when at the diftance of fix inches, two bulhels of feed will be quite fufficient ; and where the diftances are larger, ftill fmaller proportions of feed will anfwer the purpole. In regard to the periods and manner of fowing thefe forts of crops, it is evident that the former muft vary with the in- tentions of the cultivator ; but the winter fowings (hould be performed fome time between Auguft and Oftober ; and in expofed fituations and poor foils, more early than in thofe of the contrary defcription. As for the fpring fowings of thefe crops, they may be executed from the beginning of March to the end of April, or even earlier, with fuccefs. In fome places, as on the down lands in Suffex, they find great advantage from fowing fpring tares in June with a light mix- VoL. XXXV. ture of rape or cole feed, as about a quart to the acre, on the fame land, as furnifliing a good and nutritious feed for weaned lambs in the autumnal feafon. With regard to the mode of fowing crops of this nature, it is moftly that of the broad-caft, which fhould be performed as evenly as polTible over the furface of the well-prepared land ; the feeds being afterwards well covered in by proper harrowing, in order to prevent their being picked up by birds, and to enfure their perfeft vegetation and growth. It has been fuggefted, however, that in rich clean foil, it is probable the row method would fucceed well with this fort of crop, as is the praftice in fome of the fouthern diftrids of the ifland, according to a late praftical writer. And with fome it has been the cuftom to fow a little rye with their winter tare crops, and a fmall quantity of barley with thofe of the fpring, on which, however, it has been well ob- ferved, that as plants of different forts never fucceed well together, it is probable that little advantage can be derived from the praftice, cfpecially as the tare is not a plant that ftands much in need of proteftion in the early flages of ita growth, and may be injured by too much fhade and clofc- ncfs. The former of thefe forts of feed, and fome others, may, however, be occafionally blended with it, and fown at a good green feed for fome forts of young animals, as already noticed. It has been fuggefted in the firft volume of the Farmer's Magazine, that the moft produftive method of fowing this crop, when intended for feed, is to mix them amongft beans when drilled, at the rate of one firlot of tares to one boll of beans. It is further ftated, however, as obvious, that when tares are intended for green food, there is no neceflity for mixing them with beans. But that when fuch is the purpofe, they require to be fown tolerably thick, fo as the furface may be early covered ; and if the ground is good, and recently dunged, an acre of them will afford as much keep for horfes and cows, as can be gained from a full clover crop ; at leaft the writer has found them fully as beneficial. It has been found that crops of this fort are capable of being grown well after wheat or barley, but that they may be grown after almoft any fort of crop where the land is in good heart, and properly prepared for the purpofe. In regard to the after-management of thefe forts of crops, from their covering the land in a very complete manner, when they are fufliciently full, they do not require any great attention during their growth. And in the procefs of making tare-crops into hay, more attention is found neceffary than in thofe of moft of the arti- ficial graffes, as wet is more injurious to them, and they re- quire more fun and air ; but in other refpcfts they demand the fame cautious management, in order to prevent the foliage from being loft. The moft proper time for cutting for this purpofe is, ac- cording to the author of the Synopfis of Hufbandry, when the bloffbras have declined, and the crops begin to fall flat on the ground. When well made, the hay is of the beft and moft nutritious quality or properties, being extremely ufcful in many intentions. The writer of the Report of the State of Agriculture in Middlefex, ftates the produce as the refult of experience, in having frequently weighed greeo tares, to be ten or twelve tons per acre, which is a large crop. And when made into hay, at about three tons the acre, which ffiews the vaft difad- vantage of making thefe crops into hay. The value of the produce, eitimating it as if the whole were made into hay, being in that diftrift from twelve to fifteen guineas the acre ; and in fituations where other forts of hay fcU at fifty fhil- P lingi TARE. lir.jrs or tlirri- pounds, at from about fcvon pounds ten (IiiUings to nine pounds the acre. And it is found that the fpring tan.-crops are lighter, and moll liable to be injured by a dry fcafon. The produce in feed is likewife found to be confidcrable, bring by fome ftated at from three to fix facks ; but in other inftances forty bufticls or more have been obtained from the acre. It has been fuc;gefted, that this fort of feed is greedily devoured by pigeons, and that it may probably be ufrd for poultry with advantage and profit, as being a very ftimulant fort of food in the produftion of eggs. In refpcft to the application of taie-crops, it has been well remarked by a late writer, that there can be little hefitation in pronouncing that of foiling them with horfes or other forts of live-ftock on the farm, as the moft advantageous and beneficial method of any whi jh can be adopted for them. It has, however, been adviied by the author of the Agri- cultural Survey of the above diftrift of Middlefex, that the farmer's ftock fhould be wholly fupported on them, from the time they begin to blow till the bloiToms begin to fall off, and the formation of pods to take place. And, on ac- count of the rifk from wet, he advifes that all the Hock of a farm ftiould be foiled on them green, as it will have the good effeft of taking the ftock off the grafs land long enough to allow of its being mown for hay ; and by this means the meadow-hay be much increafed in quantity, and there will not be fo much occafion for pafture, the tares abundantly fupplying its place. And that befides, at the time the cattle return from green tares, the grafs land in the mean time having been mown, may be ready to receive them. The fame able writer remarks, in addition, that as it would be wafteful in the extreme to turn live-ftock into a field of tares, as their treading and lying down would do great mif- chief to the crop, even by feeding it in fmall patches hurdled off ; the moft advifeable method would be to mow the tares of tLe firft half acre, and to c^rry the produce into the ftables, cow-houfes, and fold-yards, or on poor land, to be confumed by ftock ; then to hurdle the growing tares from fuch ckared ground, into which put the ftock, and feed them all with the tares, given to them in racks, removing tie hurdles and the racks forward daily to the edge of the grjwing tares ; which wiU manure the land uniformly, and depofit all the urine in the foil. But the writer of the Cor- refted Gloucefter Report on Agriculture, has ftated another method of proceeding, where iheep are the fort of ftock employed, which feems by no means ineligible, 'uia. to feed them through rack hiadles, which are made the fame as the common hve-railed ones, only leaving the middle rail out, and nailing upright pieces acrofs, at proper diftances, to admit the (lieep to put iheir heads through. A fwathe of vetches being mown in the diieftion you wifli to plough the land, a fufficient number of thefe hurdles, allowing one to five (heep, are fet up clofe to it : at noon, the fhepherd mows the fwathe and throws it to the hurdles, and the fame at night : next morning, a fwathe being firft mown, the hurdles are again fet, thus moving them once in the twenty- four hours. By this trifling additional trouble, the vetches are, it is faid, eaten clean off, and the land equally benefited. The writer of the Hertfordfhire Corrected Agricultural Report remarks, that in the heavy land diftrifts, he has found tares very generally cultivated for foiling the teams ; a hufbandry, he thinks, that cannot be too much commended. And he contends farther, that it appears by the writings of Ellis, that this branch of agriculture was common in this county above fixty years ago, before it was at all praftifed in many other counties, and he was glad to find it holds its place (leadily in the management of the prefent period. It is noticed, that Mr. Leach, of the fame diftriil, manures foi' tares, and that they are mown early, and then three earths are given to the land, when he gets good turrjps after them. And that they are univerfal about Rickmanf-.vorth and Watford, many being fed off by fheep. And the fame writer fays, in his Agricultural Survey of Norfolk, that the culture of this plant has increafed very coiifiderably in that diftriiSl : within his memor)- they are multiplied at leaft tenfold. And that Mr. Overir.an there bep-ins fowing winter tares about Michaelmas, once more betore Chriftmas, and fometimes twice or thrice more, with fpring tares for a fucceffion. That after moviring, he does not plough the land, but runs fiieep over it till the whcat- fowing. But that the cultivator who has made by far the greateft exertions ia this hufoandry that he ever met with, is Mr. Purdis, of Eggmorc, who has 300 acres every year, feeding no more than is neceffary to Supply himfelf : they are fed by his (heep ; ufed in foiling his numerous horfes ; and immenfe quantities made into hay. It is fuggefted, as the remark of Mr. Blithe, that the fowing tares for fummer-feeding fheep, is an abfolutcly new improvement in the hulbandry of Weft Norfolk, and that he thinks it a very gieat and important one. And in both the counties of Gloucefter and Worcefter, it is the praftice to fow thefe crops as pafturage or feed for horfes, and eat or get them off early enough to allow of turnips being fown the fame feafon. But, as in the wet feafons^ when the tare-crops are large, the ftems are apt to become rotten upon the ground, and in this condition fuch food often proves prejudicial to the horfes ; in all iuch cafes, it will be imprudent to cut or eat them any longer for the purpofe of foiling in thefe ways. It is noticed in the twenty-fecond volume of the Annals of Agriculture, that in the county of Suffex, thefe forts of crops are of fuch ufe and importance, that not one-tenth of the ftock could be maintained without them ; horfes, cows, ftieep, and hogs, all feed upon them, the hogs are foiled upoit them without any other food. Tlus plant maintains more (lock than any other plant whatfoever. Upon one acre, Mr. Davis, of this diftrift, can maintain foui- horfes in much better condition than upon five acres of grafs. Upon eight acres he has kept twelve horfes and five cows for tlu-ee months without any other food. No ai-tificial food what- ever is equal to this excellent plant in his opinion. They here find this srcp to be a hearty and moft no^rith- ing food for all forts of oattle. Cows give nioi-e butter when fed with this plant than with any other food wliat- foever. And by having one crop of vetches fuccecding another, Mr. Halftead, in the fame county, infures a crop the whole fummer of the beft food that can be given to cat- tle ; after this, he fows turnips, and then wheat. In many of the fouthern counties, as Cornwall, Devon, Kent, and fome others, the culture of this fort of crop might be greatly extended with vaft advantage, efpccially if it were grown with the view of foiling different kinds of live- ftock, to which purpofe it is by far the beft fuited. Alfo, in many cafes, as a highly valuable early fort of green fpring feed for many kinds of young animals ; the climates and foils being mild, and particularly favourable for their very early produftion and abundant growth, when fown at the moft proper fe.-ifon. It is remarked alfo, that they have on the South Downs an admirable praftice in their courfe of crops, which cannot be too much commended, that of fubftituting a double crop of tares, inftead of a fallow for wheat. Let the improving cultivator give his attention to this pra.oa. See TiKGA. TARGAR, a name given by fome of the tlieinical writers to oil of juniper. TARGET, ajh'uld; thus called from the Latin, tergum, hack, becaufe originally made of leather, wrought out of the back of an ox's hide. Target is alfo the name of a mark for the artillery to hre at in their praftice. Target, in Geography, a town of France, in the depart- ment of the AUier ; 2 miles S.E. of Montmarault. TARGIONI, Tozzetti, Giovanni, in Biography, an eminent Italian phyfician, was born at Florence in 1712, and took his degree of M.D. at Pifa, where he had ftudied and acquired fmgular reputation. Upon his return to Florence, he applied to the iludy of botany under the celebrated Micheli, who, at his death, bequeathed to him his library, herbarium, and MSS., and alfo the fuccefTion to his direftor- fhip of the botanical garden. He was likewife nominated profefTor of botany in the Florentine college by the grand duke ; and admitted to the two academies of the Apatilli and Delia Crufca. In conjunftion with Cocchi, he engaged in making a catalogue of the library of Magliabecchi, which he had bequeathed to the public ; and in recompence of his labour, the grand duke appointed him librarian. His va- rious occupations, in conneftion with his praftice, rendered it neceflary for him to refign the office of direiftor of the bo- tanical garden in 1 749. The mind of Targioni, however, was fo aftive, that not content with his literary and profef- fional employments at home, he made feveral fcientific ex- curfions, the refult of which he publifhed in his " Relazioni d'alcuni Viaggi fatti in divcrfe parte della Tofcana per of- fervar le Produzioni naturali, e gli antichi Monumcnti d'effe," Firenz. t. i. 175 1, 8vo. As a phyfician, he alfo publifhed feveral pieces, and among thefe were " Direftions for the Recovery of drowned Perfons." He alfo promoted inoculation for the fmall-pox ; and direfted his attention to the treatment of epidemics, the draining of marfhes, the prevention of the inundations of the Arno, and the examina- tion of vegetables to be fiibftituted for bread in a time of fcarcity. Having taken leave ot littrary labours by a work on the progrefs of the phyfical faiences in Tufcany, compre- hended in four volumes, he rcftrifted himfelf to medical praftice from the year 1770 to 1780. At length, in Ja- nuary 1782, being in his 71ft year, his life terminated by a gradual decay. Haller. Gen. Biog. TARGIONIA, in Botany, was fo named by Micheli, in honour of his friend and fellow-labourer in the natural hiftory of Italy and other parts of the world. Dr. Cyprian Targioni, of Florence, whofe valuable mufeum he highly celebrates. There have been feveral perfons of this name, diftinguifhed at Florence, in medicine and natural hiftory. John Targioni, who took the furname of Tozzetti for an eftate, was profeflbr of botany there, and died in 1782, aged 70. He publilhed Travels in Tufcany, as well as feveral other works relating to natural fcience, and purchafed the mufeum and library of Micheli. (See that article.) — Mich. Nov. Gen. 3. t. 3. Linn. Gen. 565. Schreb. 764. Mart. Mill. Did. v. 4. Sprengel in Stockholm Tranf. for 1802. 85. t. 4: alfo in Bullet, des Sciences, 27. t. 2. f. 2. JuiT. 8. Lamarck Illuftr. t. 877. — Clafs and order, Cryj)- togamia Hepatic^. Nat. Ord. ^Iga, Linn. Hepatict, Jufl. Gen. Ch. Cat.? Perianth a continued membrane, finely reticulated, enveloping the piftil, at length burfting. Stam.f Anthers numerous, rouJidilh, feffile, fcattercd over the in- fide of the perianth. PiJ/. Germeii oval, nearly feflile, ac- companied at the bafe by the rudiments of others, with abortive lUKs ; (lyle terminal, awl-{liaped, tubular, deci- duous ; iligma concave. Peric. Capfule fefTile, nearly glo- bofe, ot two hemifpherical valves, burfting vertically, and one cell. Seeds very numerous, minute, roundilh, connefted by five threads into a denfe globular mafs. Ell. Ch. Capfule globofe, of two concave valves, and one cell. Seeds numerous, combined by fibres into a globe. I. T. hypophylla. Dotted Targionia. Linn. Sp. PI. 1603. Hudl. 519. Engl. Bot. t. 287. Dickf. Dr. PI. 20. (T. minima et vulgaris ; Mich. n. i. Lichen petrxub minimus, fruftu orobi ; Dill. Mufc. 532. t. 78. f. 9. L. alter acaulis LTTo-K^Xoxaaroi ; Column. Ecphr. part I. 333> t. 331.) — Very common in heathy rather moill places, among moffes, on old walls and rocks, in moft parts of Italy. It is faid alfo to have been found in Dcvonfliire, and in Scotland. We have had hving plants from a bank near Nayland in Suffolk, where the Targionia was difcovered by the Rev. Mr. Kirby. The fronds are oblong, inverfcly heart-fhaped, three quarters of an inch in length, growing nearly horizontally, in denfe imbricated patches, attached by copious fine fibrous roots ; their upper furface dark green, marked with a (light longitudinal furrow, and be- fprinkled with pale prominent points ; the under fide black, becoming vifible when, by drought, the margins arc curled in. The parts of the Jlower we have not feen. The fruit ftands at the back of the frond, a little below the end, and looks like the feed of a vetch, being nearly globular, of a very dark brown, almoft black ; feparating when ripe into two hemifpherical valves, enclofing a globular mafs of black powdery feeds, conncfted by fibres. The habit of the plant is exaftiy like that of a Marchantia, (fee that article,) but the generic charafter differs cfTentially, by the fruit alone, from that genus, as well as from Jungermannia, of which latter Hedwig fufpedled it to be a fpecies. We rely on the obfervations of Sprengel for the ftrufture of the flower, though without any fohd conviftion that the anthers are what he defcribes. The female parts of fruftificatiou refemble thofe of true Musf'l, (fee that article,) but the capfule is totally different. This part is called calyx in the JEnglifh Botany, from a fuppofed analogy to Sphttrocarpus, which we now believe to have little foundation. Whether there be any membrane extended from the bafe of the ftyle over the germen, like the calyptra of moffes, does not appear from Sprengel's defcription, but it is highly probable ; though as he exprefsly fays the ftyle itfelf is deciduous, that circumftance would ftill aftbrd a material diftinftion. T ARGON, in Geography, a town of France, in the department of the Gironde ; 6 miles N.E. of Cadillac. TARGOWISKA, a town of Poland, in Volhynia ; 9 miles S. of Lucko. TARGUM, in the Sacred Literature, a name which the Jews give to their Chaldee gloffes and paraphrafes on the Scripture. See PAKAniUASK. Thefe Chaldee paraphrafes, which were tranflations of the fcriptures of the Old Teftament, from the Hebrew text into the language of the Chaldxans, were called Targums : for the word targum fignifies in Chaldee an iiiterprelation or verfion of one language into another, and may properly be applied to any fuch verfion or trandation ; but it is moft commonly by the Jews appropriated to thefe Chaldee para- phrafes by way of eminence. A$ TAllGUAI. As tlie Jews, during llicir long captivity in Babylon, had forgot their ancient language, the Hebrew ; and now under- llood nothing but the language of thoir maftcrs, the ChaJ- deans; there was a nccclfity of explaining the prophets in that language ; and to this nocclTity is o-.vi:!g the firft begin- ning of the Chaldec paraphiafc. To make the fenfe of the text underftood, each doftor made a paraphrafc of feme pari of it in tlie vulgar tongue ; and as thefc feveral interpretation-?, in time, became very voluminous, certain rabbins undertook to coUeft them to- gether ; and this colledion they called The Targum. The Jewifli doftors do not agree about the antiquity of tlie Targum ; for the more modern Jews having blended tiieir own comments with thofe of the ancients, no certain ao^e or era can be fixed for the whole work. It is commonly believed, that R. Jonathan, who Uved under the reign of Herod the Great, made the firft Chaldee verfion of the prophets ; and with this verfion mixed the interpretations borrowed from tradition. Onkelos, it is certain, tranflatcd the Pentateuch almoft word for word ; and without any paraphrafe ; and another verfion of the Pentateuch is akribed to Jonathan, but that without much certainty. Dr. Prideaux thinks, that the verfion or Targum of Onkelos is the moft ancient of all that are now extant : and 'the principal reafon of his adopting this opinion is, that the ftyle in which it is written approaches nearer to the ftyle of that part of Daniel and Ezra, which is written in the Chaldee language, and which may be corifidered as a ftandard of its punty, more than any other. This Tar- gum has been held in higher efteem among the Jews than all the other Targums, and being fet to the fame mufical notes with the Hebrew text, it is thereby made capable of be- ing read in the fame tone in their public affembhes. The r.ext to this in the purity of its ftyle, is the Targum of R. Jonathan Ben Uzziel on the prophets ; that is, on Jofhua, Judges, the two books of Samuel, the two books of Kings, ifaiah, Jeremiah, Ezekiel, and the twelve minor prophets. The Targum of Onkelos is a ftrift verfion, rendering the Hebrew word for word ; v/hereas Jonathan takes the liberty of a paraphraft, by enlargements and addi- tions to the text. The third Targum, or that on the law, afcribed to Jonathan, is not his, bcca'^fe the ftyle of it is wholly different from that of his true Targum on the pro- phets, and feveral things are mentioned in it, which had no being, or at leaft no name, till after Jonathan's time. The fourth Targum is on the law, written by an unknown au- thor, and at an unknown period. It is called the JerufaJem Targum, probably becaufe it was written in the Jerufalem dialeiS, which was fpoken by the Jews after their return from Babylon, and which contains a mixture of Hebrew v/ords vrith the Chaldee. This Jerufalem Targum is not a continued paraphrafe, as all the reft are, but confined to feleft palTages, as the author feems to have thought the text moft wanted an explication. In many places it is taken word for word from the Targum, faid to be Jonathan's on the law : and contains feveral things, which are delivered in the fame words in the New Teftament by Chrift and his apoftles. Dr. Prideaux accounts for this circumftance, by fuppofing that thefe were fayings and phrafcologies, which had obtained among the Jews in the time of our Saviour, and continued among them long after : and hence Chrift and his apoftles, and afterward the author of this Targum, de- rived them from the fame fource. The fifth Targum, which is that on the Megilloth, «. <•. Ruth, Efthcr, Ecclefiaftes, Solomon's Song, and Jeremiah's Lamentations ; the fixth, which is the fcrond Targum on Efther ; and the fcventh, which is that on Job, tJbe Pfahns, and the Proverbs, are all written in the moft corrupt Chaldee of the Jerufalem diaieft. Of the two former, no author is named ; but the author of the third is faid to be Jofeph the one-eyed, but who he was, or when he lived, we are not told : that on the Megilloth, which mentions the Mifchna and the Talmud with the expli- cation, muft have been written after the Babylonifti Talmud, or the year of Chrift 500. The eighth and laft of thefe Targums, is that on the two books of Chronicles ; pub- lifhed by Beckius at Augft)urg in Germany, that on the firft book in i68o, and that on the fecond in 1683. On Ezra, Nehemiah, and Daniel, there is no targum. That the Targum of Onkelias on the law, and that of Jonathan on the prophets, are as ancient as our Saviour's time, if not more ancient, is the general opinion of both Jews and Chriftians. As to all the other Targums befides thefe two, they are certainly of a much later date ; the ftyle of every one of them is more baibarous and impure than that of the Jerufalem Talmud, and they muft, therefore, have been written after the compofure of that work, ;". e. after the beginning of the fourth century after Chrift ; and if the Talmudic fables, with which they abound, were taken out of the Babylonifii Talmud, this will bring their date ftill lower, and prove them to have been written after that Talmud, or after the beginning of the fixth century after Chrift. • The Targums of Onkelos and Jonathan are in fuch great efteem among the Jews, that they hold them to be ot tlie fame authority with the original facred text, and for the fup- port of this opinion, they feign them to be derived from the fame fountain. The Chaldee paraphrafe of Onkelos, they fay, was delivered in the fame manner with the real law, when God gave the written law unto Mofes at Mount Sinai ; and %vhen by his holy Spirit he diftated to the pro- phets the prophetical books, he delivered feverally to them upon each bock the Targum of Jonathan at the lame time. Thefe were delivered by faithful hands, the firft Iroui Mofes, and the other from the prophets, till they came down to Onktlos and Jonathan, who only put them into writing. Agreeably to the high opinion that was entertained of them, they were read every Sabbath-day in their fynagogues, in the fame manner as the original facred word itfelf, of which they were verfions ; and this ufe of them was con- tinued to late times. Whether the Targums of Onkelos and Jonathan were received for this ufe fo early as our Saviour's time is not certain ; however, it feems that thefe, or fome others, were ufed for the inftruftion of the peof>le, and were read among them in private as well as in public. Agreeably to this purpofe, they had fome of their bibles written out in Hebrew and Chaldee together ; that is, each verfe firft in Hebrew, and then in Chaldee ; and thus from verfe to verfe through the whole volume. In thefe bibles, the Targum of Onkelos was the Chaldee verfion for the law ; and that of Jonathan for the prophets ; and for the Hagiographa, the other Targums that were written on them. One of thefe bibles, thus written, Buxtorf tells us he had feen at Strafburg : and biftiop Walton acquaints us, that he had the perufal of two others of the fame fort, one in the public Hbrary of the church of Weftminfter, and the ether in the private ftudy of Mr. Thomas Gataker. The other Targums are all of a much later date than thofe of Onkelos and Jonathan, and of far lefs authority : however, biftiop Walton has introduced moft of them into his Poly- glot. The Targums of Onkelos and Jonathan are of great ufe for the better underftanding not only of the Old Tefta- ment, on which they are written, but alfo of the New. As to the TAR tJie Old Teilament, they fei-ve to vindicate the genuincnefs of the prefent Hebrew text, by proving it to be the fame that was in ufe when thefe Targums were made, contrary to the cpinioa of thofe v/!io think the Jews corrupted it after our .S;.viour's time. They help to explain many words and phrafes in tlie Hebrew originul, and they hand down to us rr.any of the ancient cuiloms of the Jews. And fome of thefe, with the phrafeologies, idioms, and peculiar forme of fpeech, which we find in . them, do in many iiiftances help as much for the better illuftration and b<;tter underftanding of the New Teftament as of the Old ; the Jerufalem Chal- dee dialeft, in which they are written, being the vulgar lan- guage of the Jews in our Saviour's time. They alfo very mufh ferve the Chrillian caufe againft the Jews by inter- preting many of the prophecies of the Mefliali in the Old Teftament, in the fame manner as the Chriftians do. Many inilances aj-e produced to this purpofe by Dr. Prideaux in his Conned, of the I lift, of the Old and New Teft. vol. iv. ?• 777. &c. , _ Thefe Taigums are publilhed to the beft advantage in the lecond edition of the great Hebrew bible fet forth at Bafil by Buxtorf the father, anno 1610, for he has reftified the Chaldee text, and reformed the vowel pointings in it : the Targums having at firft been written without vowel points, which were afterwards added very erroneoufly by fome Jews. TARHONA, in Geography, a town of Africa, in Tri- poh ; 25 miles S.W. of Lebida. TARI, or Torn, a river of Africa, which runs through the kingdom of Popo into the fea. TARI, in Commerce. See TaRO. TARICHI.iE, in Jncient Geogrsphy, iflands fituated on the coaft of Africa, in the Mediterranean fea, between Leptis and Thapfus, mentioned by Strabo. TARIDEGO, in Geography, a town of Africa, on the riuer St. Domingo. N. lat. 12° 10*. W. long. 13° 56'. TARIENTO, a town of Italy, in Friuli ; 8 miles N. of Udina. TARIER of Buffbn, in Ornithology. See MoTACILLA Rubetra. TARI ERA, in Ichthyology, the name of a river-fifti raught in many parts of America. It is an oblong fifh, with a ftraight back, and a belly fomewhat hanging down ; its under jaw is longer than its upper, and its teeth are extremely fhai-p : among thefe are two longer than the reft in the middle of the under jaw, and four fuch in the upper ; its fcales are large, its back brown, and its belly and fides whitifh. It is a well-tafted iiih, but full of bones. Marcgrave. TARIF, or Tariff, Book of Rates ; a table or cata- logue, drawn ufually in alphabetical order, containing the names of feveral kinds of merchandize, with the duties or cuftoms to be paid for the fame, as fettled by authority, and agreed on between the feveral princes and ftates, that hold commerce together. TARIFFA, in Geography, a fea-port town of Spain, in the province of Seville, fituated on a bay to which it gives name, on the north fide of the Straits of Gibraltar, fortified with old walls and towers, with a caftle, in which the governor refides. By the Romans it was called " Julia Tradufta," and " Julia Joza." The prefent n.ame is from the Moors ; 27 miles S.S.E. of Medina Sidonia. N. lat. 36° 3'. W. long. 5° 41'. TARIFILON, in Botany, a name by which Avicenna, and fome other authors, have called the trlfol'tum bitum'inofum, or ftinking trefoil. TARIJA, in Geography, a jurifdidlion of South Ame- TAR rica, in Peru, but placed under the viceroyalty of Buf no? Ayres. This is reprcfentcd a charming and fertile country, with a ferene (ky and a fine temperature of air, producing wheat, maize, and all other things that are cftential to the fupport of man ; togetlier with the tree, which produces the herb of Paraguay, the cocoa, the vine, and flax, whicli is cuhivated merely for the fake of its feed. In the abun- dance of padures are fed a vaft number of cattle and fheep. The annual tranfports of black cattle alone are computed at little Icfs then 10,000 head, which are valued at from eight to ten piaftres each. The hides tanned and prepa^-ed form fole-leather for the inhabitants of La Plata, Potofi, &c. The demands for Spanifn and colonial merciiandife an- nually exceed 60,000 piaftres; the returns for which are made in productions of the province. St. Bernardo de Tarija is the chief town. Chicas and Tarija form one government. Tarija, a river of South America, which runs into the Vermejo, in the province of Tucuman. Tarija. See St. Bernardo de Tarija. TARIN, in Ornithology, a name given by the French, and from them by many others, to the citrinella ; a bird com- mon in Italy, and kept in cages for its beauty and fine notes. See Frincilla, TARINGASONG, in Geography, a town of Thibet; 17 miles S.S.E. of Laffa. N. lat. 28° 6'. E. long. 93'. TARINGTING, in Ornithology, a name given by the people of the Philippine iflands, to a fpecies of lapwing, which is common on the fea-fhores, and runs remarkably fwift. •' TARINURAK, in Geography, a river of Ruffia, which runs into the Lena, N. lat. 61°. E. long. 124° 14'. TARISKERI, a town of the iiland of Metelin, on the N, coaft ; 1 2 miles E. of Cape Sigri. TARITH, one of the many names given by chemifts to mercury. TARITO, in Geography, a town of Thibet; 33 niiles S.E. of Tchontori. TARKA, a mountain of Tranfylvania; 28 miles N.N.E. of Udvarhely. TARKI, a town of Hungary; 15 miles N.N.W. of Topoltzen. Tarki, or Tarhu, a town of Afia, in Dagheftan, capi- tal of the diftrift of Schamgul, feated in N. lat. 42° 50', and fuppofed to contain 10,000 inhabitants, ftands on the Cafpian {hore, in a narrow glen, through which run many ftreams of falt-water. TARKIRA-HOUTCHIN, a poft of Chinefe Tartary, in the country of the Monguls. N. lat. 44° 34'. E. long. 113° 48'. TARKO, a town of Hungary, 6 miles E.S.E. of Szeben. TARKSHA, a name of the fabulous bird Garuda, on which, in the mythology of the Hindoos, their god Vifhnu rides. This vehicle, or vahan, in the Sanfcrit tongue, is reprefented as half man half eagle ; and offers an argument for the identity of the Hindoo deity, and the Jupiter of the Greeks. Another name of this bird is Superna; which fee. See alfo Vahan. TARMA, ill Geography, a jurifdiftion of South America, in Peru, fituated to the north of Atun Xauxa, about 90 miles from Lima, to which dioccfe it belongs, and is one of the moft extenfive in this part of Peru. The climate is temperate, and the foil fertile, except towards the mountains, xvhere it is cold, and the land is chiefly applied to feeding of cattle ; and many mines of filvcr are found. Tarma, the capital, TAR capital, U 85 miles E. of Lima. S. lat. 11°. VV. long. 75' 5°'- TARMONBARRY Bridgk, a village of the county of Rofcommon, Inland, at which there is a bridge over the Shannon. The royal canal, if it (hould ever be completed, is to join the Sliannon near this place. It is 4 miles N.W. from Longford, ajid above 60 from Dublin. TARMON-HILL, a mountain at the fouthern extre- mity of the peninfula, called The Mullet, being a detached part of the county of Mayo, Ireland. TARN, a river of France, which rifes in the mountains of Lo/.cre, pafTes by Florae, Ifpanhac, St. Enimie, Com- peyre, Milhaii, St. Rome, Alby, L'lfle, Rabaftens, Ville- mur, Montauban, &c. and joins the Garonne, near Moiffac, in the department of the Lot. Tarn, a department of France, being one of the nine departments of the fouthern region, and formerly a portion of Upper Languedoc, in N. lat. 43° 40', bounded on the N. and N.E. by the department of tlic Aveiron, on the S.E. by that of Herault, on the S. by that of the Aude, and on the W. bv the departments of the Upper Garonne and the Lot, and taking its name from the river Tarn, which traverfes it from E. to W. Its territorial extent is 6080 kiliometres, and itspopulation comprehends 272,163 perfons. It is divided into 4 circles, 35 cantons, and 356 communes. The circles are Gaillac, including 59,501 inhabitants ; Alby, 63,064; Cadres, 106,918; and Lavaur, 42,680 inhabitants. Its contributions in the iith year of the French era, amounted to 2,693,820 francs ; and its expences to 252,749 fr. 18 cents. According to HafTenfratz, its ex- tent in French leagues is 30 in length, and 20 in breadth : it is divided into 5 circles and 48 cantons, and its population comprehends 289,148 fouls. Its capital is Alby. This department is diverfihed with hills and plains, and abounds in a variety of produftions, t>/z. grain, flax, hemp, wine, fruits, and paftures. It has confiderable forefts, with mines of iron, copper, lead, coal, quarries of marble, &c. TARNA, a town of Sweden, in the lapmark of Umea : 145 miles N.W. of Umea. TARN AC, a town of France, in the department of the Correze, on the Vienne ; 25 miles N. of Tulle. TARNAVAY, a town of Hindooftan, in the county of Calicut ; 20 miles N.E. of Paniany. TARNISHING, a diminution of the natural luftre of any thing, efpecially of a metal. Gold and filver, when tarnifhed, refume their brightnefs, by fetting them over the fire in certain leys. Copper, pewter, &c. that are tarnilhed, recover their luftre with tripoli and potalhes. TARNOGROD, in Geography, a town of Poland, in the palatinate of Belcz ; 52 miles W.S.W. of Belcz, TARNOPOL, atown of Auftrian Poland, in Galicia; 72 miles E. of Lemberg. N. lat. 49° 30'. E. long. 25° 40'. TARNOW, a town of Auftrian Poland, in Gahcia ; 52 miles S.W. of Sandomir. N. lat. 49° 56'. E. long. 20° 53'. TARNOWITZ, a town of Silefia, in the principality of Oppeln, near which is a filver mine ; 6 miles N. of Ober Beuthen. N. lat. 50° 25'. E. long. 18° 47'. TARO, a river which rifes in the fouthern part of the duchy of Parma, and runs into the Po, 9 miles E. of .Bufleto. The country through which it pafles is called Val di Taro — Alfo, a late department of France, formed by the duchies of Plaeentia and Parma. Taro, in Commerce, a money of account and copper coin ef Naples, Sicily, and Malta. For the accounts at Malta, fee ScuDO. The banks at Naples keep their accounts in diucati, tari, and grani. A ducat contains 5 tari, locarlini, or T A R 40 cinquini : a taro, or tarino, is worth 2 carlini, or 20 grani. Among the filver coins aro tari, at 2 carlini. By the coinage of 1804, the piece of 12 carlini (hould contain 350I Englilh grains of fine filver ; fo that it is worth 49(/. fterling ; and the ducat of 10 carlini is worth 41^. fterling nearly, or l/. fterling = 5 ducats 88 grani. The taro of Sicily is worth about 4^., or more accurately, 1/. fterling — I ounce 28 tari 15 grani. TAROATAIHETOOMO, is the name of one of the two firft or fupreme deities at Otaheite : the other, who is fup- pofed to have been a rock, is called Tepapa. Thefe produced a fon called Tune, to whom their prayers are generally ad- dreffed, and who is fuppofed to intereft himfelf in the aff'airs of mankind ; and a daughter called Telloivmatatayo,- the Tear, from whom proceed the months and days. From the two firft beings they fuppofe alfo to have fprung an inferior race of deities called Eatuas. Hawkefworth's Voy. vol. ii. p. 238. TARODUNUM, in AnclenI Geography, a town of Ger- many, near the Danube, and in the vicinity of Arje Flavix. TAROM, in Geography. See Tarum. TARON, or TiROAN, a town of Perfia, in the province of Adirbeitzan ; 120 miles S.E. of Tauris. TARONA, in Ancient Geography, a town of the Tauric Cherfonefus, S.E. of Taplira, and E. of Satarcha. TAROONCHI, in Geography, a town of Hindooftan, in Myfore ; 15 miles SS.W. of Chinna Balabaram. TAROUC Y.\MDSON, a lake of Thibet, about 53 miles in circumference. N. lat. 31° 52'. E. long. 84° 38'. TAROUCA, a town of Portugal, in the province of Beira ; 9 miles S. of Lamego. TAROULA, a town on the eaft coaft of the ifland of Tidor. N. lat. 0° 42'. E. long. 127° 20'. TAROURS, a town of Hindooftan, in Berar ; 30 miles N.N.E. of Neermul. TAROUT, a town of Arabia, in the province of Heds- jas ; 32 miles S.E. of El Catif. TARP, a town of Sweden, in the province of Dalland ; 12 miles N. of Uddevalla. TARPANS, a kind of wild horfes in the Caucafian defert, E. of the river Yaik. They are of a middling fize, roundifti, ftiort, generally of a blueifti-grey coloOr, with big heads, and ewe -necked. They are taken with a noofe, and broken to the faddle by being coupled to a tame horfe. TARPAULIN, or Tarpawling, is a piece of canvas, well pitched and tarred over, to cover the hatchways of a fliip at fea, in order to prevent the penetration of the rain or fea-water, which may occafionally rufh over the decks. The term is alfo ufed in derifion for a perfon bred at fea, and educated in the mariner's art. We alfo, of late, ufe it to exprefs a painted floor-cloth. Tarpaulin Cove, in Geography, a bay on the S. of Maflachufetts, near Falmouth. TARPEIAN, Takpkiu.s, in Antiquity, an epithet given to a rock in ancient Rome, of confiderable height ; whence, by the law of the Twelve Tables, thofe guilty of certain crimes were precipitated. It was on this rock that the Capitol was built. The Tarpeian rock might formerly be fteep enough on one fide to break a man's neck ; but it could never have been of that furprifing height mentioned by fome writers, if any judgment can be formed from its appearance at pre- fent. See Burnet's Letters, p. 238, and Miffon's N, Voyage, p. 103. It took its name from a veftal, called Tarpeia, who be- trayed the Capitol, of which her father was governor, to the Sabines ; on condition that they would give her all they bore T A R TAR bore on their left arms, meaning their bracelets. But, in- ilead of bracelets, they threw their bucklers (which were likewife borne on their left ;irm) upon her head, and cm (Tied her to death. Others afcribc the delivery of the Capitol to her father, Spurius Tarpcius ; and add, that he was precipitated down this rock by Ronuilus's order, and tliat this hence- forward became the punifliment of all criminals of the like kind. Tarpeian Games, Ludt Tarpcii, were games inftitutcd by Romulus in honour of Jupiter Feretrius ; and called alfo Cnpitolini /utJi. Sec Capitoline. TARPORLEY, in Geography, a fmall market-town in the hundred of Ediibury, and county palatine of Chefter, England, is fituated on the great road from London to Cheller, at the diftance of 172 miles N.W. from the former, and 1 1 miles E.S.E. from the latter. In ancient records, Tarporley is called a borough, and the houfes burgages : it had in former times a mayor, as appears by deeds of the years 1348 and 1396: it is now governed by a conftable. The market, which was originally on Tuefday, was granted in 1 28 1 to Hugh de Tarporley, then lord of tlie manor : it had been many years difufed, but was reilored in 1 705 by fir John Crew, who alfo procured a grant of three annual fairs, and built a market-houfe. The parifh of Tarporley, which includes the townihips of Eaton, Rufhton, and Utkinton, contained in the yeai- 1 8 1 1 , according to the population report, 365 houfes, and 1852 inhabitants. An annual fox-hunt, of great celebrity, is held at Tarporley, on the firil week in November, during which week are horfe-races, at a place called Crab-tree Green, on Delamere foreft. About t«o miles fouthward of Tarporley rifes the great infulated rock of Beefton. It is compofed of fand-ftone, and is nearly perpendicular on one fide, which gives it a tremendous appearance, but the other fide gradujilly flopes to the level of the country. Its height is 366 feet. On the creft of this rock are the ftately ruins of the far-famed Beefton caftle, whofe almoil impregnable llrength was once proverbial. This fortrefs was erefted in 1220 by Ranulph de Blundeville, earl of Chefter. It confifted of an outer and inner area. The outer was defended by a ftrong wall, for- tified with round towers, which ran acrofs the flope from one end of the precipice to the other. Some parts of this wall, and fix of the towers, are ftill extant. The area in- clofed is nearly five acres. The caftle was defended, on one fide of the area, by a deep ditch cut out of the folid rock ; on the other, by the abrupt precipice that overhangs the vale of Chyfnire. The entrance is through a noble gateway, guarded on each fide by a great round tower, with walls of prodigious thicknvfs. During the civil wars of the 17th century, this foreft was alternately befieged by the royal and parhamentary forces; and in 1646 was difmantled by order of the parliament Lyfons's Magna Britannia, vol. ii. part 2. Chefhire. Beauties of England and Wales, vol. ii. Cheftiire, by J. Britton and E. W. Brayley. TARPOU, a lake of Tliibet, about 60 miles in cir- cumference. N. lat. 30° 32'. W. long. 81° 54'. TARQUINIUS PRISCUS, Targuin the ^Indent, in Biography, the fifth king of Rome, was the fonofan opulent merchant of Corinth, wlio, efcaping from tyranny at home, fettled at Tarquinii, in Etruria, where he married a female of rank, by wliom he had two fons. One of them died, and the other, named Lucumo, was urged by his wife Tanaquil, a lady of rank and of ambition, to remove from Etruria to Rome ; where he chancred his praenomen Lucumo into Lucius, and his family name Damaratus into Tarquinius, borrowed from his native city. Here be ingratiated liim- VoL. XXXV. felf by his manners with Ancus M.Trtius, tiie king, and alfo with the people ; and by the liberal application of his wealth to public purpofes, particularly to the fupport of the wars in which Rome was engaged, as well as by his flcill and valour in the field, he gained a reputation whicli ferved to advance him to the rank of patrician and fenator. Ancus alio appointed him to the confidential office of guar- dian to his two fons. Upon the death of Ancus, B. C. 616, the ambition of Tarquin prompted him to take meafures for fecuring the fuccefiion to iiimfelf. The crown being eleftive, ho contrived, by bribes and folicitations, to obtain the fuffrages of the people, who proclaimed him king ; and in order to ftrcngtiien his intcreft in the feiiate, he intro- duced from plebeian families 200 new members into this body. In his wars with the Latins, he took feveral of their towns, and obhged the Sabincs and Etrurians, whofe confederacy he defeated, to feek an alliance with Rome on humihating terms. Tarquin, in honour of his fuccefs, was granted a triumph ; and the fpoils of war were devoted to the ereftion of the Circus Maximus, for the exhibition of the Roman or great games. The Etrurians, having after- wards rebelled, obtained peace upon condition of their recognizing Tai-quin as their fovereign. During an inter- val of peace, after a nine years' war, Tarquin employed himfelf in improving the city, by enclofing it with walls, and by conftrufting thofe fewers, which were in fubfequeiit times the objefts of admiration. On occafion of a new war with the Sabincs, Tarquin, whofe army was deficient in cavalry, augmented the ftrength of each divifion ; and having defeated the Sabines, they fubmitted, and furrendered all their fortrefTes to the Romans. At this time Tarquin fulfilled his vow of erefting a temple to Jupiter, Juno, and Minerva, on the Tarpeian rock ; and by this aft he acquired the honour of founding the principal feat of the Roman worfhip. Having attained to his 80th year, the fons of Ancus took occafion to make an attempt for defeating his plan of continuing the crown in his own family by the marriage of his daughter to Servius TuUius, by confpiring againft his life. They fo far fucceeded as to procure the aflaffination of the king. His queen Tanaquil, however, by keeping the event fecret, adopted meafiu"es for fecuring the fucceffion of her fon-in-law : and the fons of Ancus, whofe plot had been dctefted, went into voluntary banilh- ment. Thus ended, in the year B. C. 570, the profperous and fplendid reign of Tarquin the elder, one of the moft illuftrious of the Roman kings, and equally diftinguiftied by his conduft in peace and in war. Univ. Hift. Tarquinius Superbus, or Tarquin the Proud, fuppofed to have been a grandfon of the elder Tarquin, afcendcd the throne in the year B. C. 534. His government was arbi- trary and tyrannical, and it was fupported by a band of foreign mercenaries, employed in the defence of himfelf and his party, who had contributed to advance him to the throne in contempt of the fuffrages of the people. Many of the principal ienators dreading the fate of thofe who were made the viftims of his fu^icion and avarice, retired into a voluntary exile. Tlie plebeians, at firft pleafed with the humiliation of the fenate, had fome reafon to complain of the yoke impofed upon themfelvee. The laws that had been made in their favour were abrogated ; fpies and informers watched their words and aftions ; and all public afiemblies for bufinefs or amufemcnt were prohibited. Tarquin, confcious of the odium of the Roman citizens, took meafures for ingratiating himfelf with the allies ; and with this view, he eredlcd a temple near the ruins of Alba, confecrated to Jupiter Latialis, at which the diets of the confederate cantons were annually to aiTeinble ; the Romans, Q as T A II as chief membcre of the confederation, prcfidmg at thr iacri- ficcs and deliberations. This inftitution contributed to the ftrength of the Roman ftatc, and the extcnfion of its domi- nion throughout Italy. Having taken up arms againft the Volfcians and Sabines, he returned, after a fuccefsful war, to Rome, and twice triumphed ; and he took occafion to 6ni(h the great circus and the fewers, which hi: grandfather had begun. But a war again commenced with fome dif- contentfd patricians, who had taken refuge at Gabii, a Latin city not far from Rome ; and this war lafted ieven years. At length Gabii was conquered by the treachery of Sextus, one of Tarquin's fons ; and the inhabitants, whom he treated with lenity, were incorporated with the Romans. During the reign of this Tarquin, the Sibylline books were brought to Rome, as \te have related under that ai'ticle, and fhff Capitolian temple finifhed. Ardea, the capital of the Rutuli, was the next objeft of Tarquin's military enter- prife ; and this circumftance was the remote caufe of the rape of Lucretia by Sextus Tarquin, which at length occa- fioned the expulfion of the Tarquiiiian family from Rome, as well as the extinfliou of the kingly government. Brutus, availing himfelf of the pafTions excited among the multitude by the tragic fate of Lucretia, and expoling the tyrannical government under which Rome groaned, obtained a public decree for the banifhment of Tarquin and his fons, and the army concurring in this refolution, the king was reduced to the neceflity, at the age of 76, B. C. 509, to abandon his capital, and take refuge at Caere, in Etruria. Many attempts were made for his reftoration, but all proved in- effeftual. Tarquin retired into Campania, and died there, in the 90th year of his age, and 14th of his exile. PofTefT- ing talents tit for command, he was neverthelefs violent, Cruel, and wholly unprincipled. Univ. Hift. Gen. Biog. TARRA, in Ancient Geography, a town of Afia Minor, in Lydia Alfo, a town and mountain of Crete. TARRABERRY, in Geography, a town of Bengal; 30 miles N. of Dinagepour. TARRABOGA, a town of Bengal; 45 miles S. of Doefa. TARRA.CE, Tarrass, Terraci, or Terrafs, a coarfe fort of plafter, or mortar, durable in the wet, and chiefly ilfed to line bafins, citterns, wells, and other refervoirs of water. See Calcareous Cement. That which is called the Dutch terrafs, is made of a foft I'ock-ftone, found near CoUen, upon tlie lower part of the Rhine ; it is burnt like lime, and afterwards reduced to pow- der by means of mills : from thence it is brought to Hol- land in great quantities, where it has acquired the name of Dutch terrafs. It is of a greyifli colour when it is not mixt, which is very feldom the cafe : becaufe it is very dear, and the demand for it in aquatic works very great. It is faid that in fome parts of England there is found a foft ftonc, rcfembling that of Dutch terrafs, and which might ferve as well in aquatic works. An artificial terrafs, rcfembling the true, may be formed of two parts of lime, and one of plaiiler of Paris, well beaten together, and ufed immediately. There is another fort of terrafs, ufed for coarfcr ufss, which is fometimes called Weljh terrafs, formed of one part lime, and two parts of well-fifted coal-alhes, thoroughly mixt bj^ being well beaten together. Handm. to the Arts, vol. ii. p. 32. TARRACO, in Ancient Geography, a town of Hifpania Citerior, belonging to the Cofetani. This was an ancient town in the time of the Romans. Some Spanifh authors have attributed its foundation to Tubal. Others, with greater probability, afcribe it to the Phcenicians, who called it Tarcon, which tlie Romans changed into Tarraco. Having 10 T A R been deftroycd, it was re-eftabli(hed by the two Scipios. At length it became thecapitalof that region, to which it gave the name of Hifpania Tarragonenfis. Augultus vifited this city on occafion of his war againft the Cantabri ; and it was here that the firtt altar was erefted to his honour, Galba, A.D. 68, was ])refentcd by the Tarraconians with a crown of gold. It was in the year 121 or 122 that Adrian re- cftablilhed the temple built in this city in honour of Auguf- tus, under the reign of Tiberius. See Taukagona. TARRAGON, in Botany, a name fometimes given to fouthemiuood ; which fee. See alfo Artemisia. TARRAGONA, in Geography, a town of Spain, in the province of Catalonia, fituated on a riling ground on the coaft of the Mediterranean, at the mouth of the river Francoli, and one of the moft ancient cities in Spain, faid to have been founded by the Phoenicians. Under the Romans it was the capital of a province, called Tarragonenfis, and was fortified by Scipio as a defence againft the Carthaginians. In the year 467 it was taken by the Goths, and levelled with the ground. In 516, a council was held here, in which monks ai-e firft mentioned ; when it was ordained that the fabbath ftiould commence on Saturday evening. It af- terwards ftU into the hands of the Moors, from whom it was recovered in the latter part of the iith century, and re- built by the archbifhop of Toledo, who was by the pope abfolved of the oath he had taken of going to the holy war, on condition that he would lay out the fum defigned for that expedition in rebuilding Tarragona. In the war of the fuc- ceflion, the Englilh obtained pofreffion of this city, and in- tended to keep and fortify it, by bringing the river Francoli quite round it ; and for this purpofe threw up vaft out- works and redoubts, the ruins of which are yet vifible. On the pofleffion of Gibraltar, they gave up the defign. The environs at Campus Tarragonenfis they efteem one of the moft fertile fpots in Europe. Tarragona has but few re- mains of its ancient grandeur ; infcriptions almoft deilroyed by time, fome coins, and a few ruins, give but an imperfect idea of what it formerly was. It is now depopulated, and of little importance. The harbour is dangerous, and not much frequented ; there are a few baftions in bad repair, which were formerly built for its defence. Tarragona is, however, the fee of an archbiibop, the metropobs of Cata- lonia, and difputes with Toledo the primacy of Spain. The eftabliftiment of the fee is faid to have been in the firft ages of the church : the fucceflion of archbiftiops was inter- rupted by the Moors, and remained fufpended until the ilth century. The cathedral is worthy of attention for its vaft dimenfions, the elegance of its Gothic architefture, and a magnificent chapel, built with rich m.arble and jafper, in honour of St. Thecla, tutelar faint of the church ; 08 miles E.S.E. of SaragoiTa. N. lat. 41° 8'. E. long. TARRAGUNGE, a town of Bengal; 22 miles S.E. of Moorfhedabad. TARRAPOUR, a town of Hin-dooftan, in Bengal ; 17 miles S.W. of Boghpour. — Alfo, a town of Hindoo- ftan, in Malwa, on the Nerbuddah ; 12 miles S. of Mundu. TARRAR, a circar of Hindooftan, in Allahabad, bounded on the north by Allahabad Proper, on the E. by Chunar, on the fouth-eaft by Boggilcund, and on the weft, by Bundelcund ; about 35 miles long, and 12 broad. TARRASA, a town of Spain, in Catalonia; 13 miles N. of Barcelona. TARRATZ Point, a cape on the north coaft of 3t Vincent. N. lat. 13° 24'. W. long. 65° 15'. TAR REG A, a town of Spain, in Cat.ilonia, on the Cervera ; T A K T A 11 Ccrvora; 5 miles W. of Ccrvcr.i. N. lat. 41° 36'. E. lonjT. 0° 19'. TARRIE, in Commerce, a meaiurc at Algiers for corn and dry goods, holding fomcwh.U lefs than 2\ pecks Eng- liih meafure ; 16 tarries make a caffife. TARROCK, in Ornithology, the name of a fea-fowl of the larus or gull-kind, and diftinguidied by authors by tlic name of the larus dnereus Bellonii ; and called by Linnncus the Larus trtdaBylus ; which fee. It is of the fize of the common pigeon, and is not mucli unhke it in fhape, except that the head is larger and tliickcr. The bill is black, (hort, thick, and ilrong ; the throat, neck, and under fide are white ; near each ear, and under the throat, is a black fpot ; on the hind part of the neck is a black crcfcent, with the horns pointing to the throat. Its gre.it diftinAion, however, from all the other birds of the gull-kind, is, that it has no hinder toe, but in lieu of it a fmall protuberance. It is very common on the coalls of Cornwall, and fome other of the Englifli fhores. Ray and Pennant. TARRY-TOWN, in Geography, a town of New York, where major Andre, of the Britilh army, was appreliended as a fpy ; 24 miles N. of New York. TARSAH, a town of Hindooftan, in Berar ; 18 miles E. of Nagpour. TARSI, in the Materia Medica, a name by which fome authors have called the root of the cypenis efculeiitus, or fweet cyperus of the (hops, and by which it is, in fome places, ufually called by the druggifts. See Avellanda and Habhazzis. TARSO, in the Glafs Trade, a fort of white ftone found in many rivers in Italy, and other places ; and ufed inftead of fand for the fineft cryftal-glafs, being firft burnt, and cal- cined with the fait of the polverine into frit. Neri's Art ol Glafs, p. 7. Neri calls this ftone a kind of white marble ; and adds a general rule, that all ftones that will ftrike fire with fteel, are fit to vitrify ; and thofe that will not ftrike fire with fteel, ivill never vitrify. The criteria or determinate characters of foffils were not At all fixed in this author's time, otherwife he had not called this ftone a kind of marble ; fince his own general rule of trying ftones by fteel is, though liable to a few exceptions, a very good one ; and, according to that, this tarfo could be of no affinity to marble ; for marble will not ftrike fire with fteel, nor ever be converted into glafs. The tarfo, therefore, of this and other authors, could be notliing of the marble kind ; but is truly a cryftalline mat- ter debafed by an admixture of white earth, and found in form of fmall pebbles, of a whitilh, yellowifti, or pale reddini colour ; and this is common in all the gravel-pits of England, and in the beds of fome of our rivers ; and might be ufed with great advantage by our glafs-makers, if they knew it was fo eafily to be had. On comparing thefe ftones of ours, with the cuogoli, or tarfo of the foreign glafs-makers, there is no diff'erence dil- tinguiftiable to the eye, nor will the niceft experiments by the fire, acid menftrua, &c. (hew the leaft diftinftion between them. We are not to wonder, however, tliat the glafs- makers did not hitherto diftinguifh this to be the true cuo- goli, or tarfo, fince the charafters of folTils have been hi- therto fo little afcertained, that the beft and lateft author on thefe fubjetts. Dr. Woodward, fo far miftook the ftrufture of this ftone, as to call it a fparry pebble. It is certain that fpar could never have any thing to do with glafs- making ; but this ftone has no fpar iii its conipofition. TARSUS, in Ancient Geography, a town and country of Afia, in Bithynia. Steph. Byz. Tarsus, in Geography, a fua-port town of Afiatic Turkey, in the government of Marafch, faidto have been founded b^ Sardanapalus. It was at one time the capital of Cilicia, and traverfed by the river Cydnus. It is mentioned by Dionyfius Periegctcs, Ptolemy, Mela, Pliny, and Strabo, the latter of whom fays, that it was very powerful and populous ; that its inhabitants excelled in the ftudy of philofophy, and of all the fcicnces cultivated among the Greeks ; indeed in this refpetl they furpaffed Athens, Alexandria, and all other academies in the world. It is now inhabited by Turks, Greeks, and Armenians, and is the fee of a Jacobite bifhop and Neftorian archbifhop. It is large, and furrounded with a double wall. St. Paul called himfelf a native of Tarfus ; and here the emperor Julian was buried. It has been faid that in the time of St. Paul, Tarfus was a Roman colony, and that the apoftle was a citizen of Rome by virtue of hia n^itivity at Taifus. (Afts, xxi. 37 — 39. ch. xxii. 3.) But Dr. Lardner has particularly examined this ])oint, and al- leged feveral arguments to prove, that Tarfus, though it was no mean city, as St. Luke fays, was not a municipium, or town of Roman citizens. (See Si. Paul.) Tarfus was taken by the Saracens in 640 ; 25 miles W. of Adana. N. lat. 37° I'. E. long. 34° 37'. Tausus, in Anatomy, that part of the foot (confifting of about its pofterior half ) to which the leg is articulated. Its front portion correfponds to the inftep in common language. Sea EXTREMITIFS. The fame name is applied to the portion of cartilage con- tained in each eyelid. See Eye. TARTAGLIA, Nicholas, in Biography, a celebmted mathematician, was born at Brefcia about the beginning of the 1 6th century. Being left deftitute in his childhood by the death of his father, he was no lefs unfortunate at the fiege of Brefcia in 15 12, in receiving feveral wounds, and particularly one which divided his lip, fo that he loft the power of diftinil articulation ; and from this circumftance he got the name of Tartaglia. The defefts of his early- education were amply compenfatod by his genius and dili- gence. Having reilded ten years at Verona, he afterwards, viz. in 1534, became profeffor of the mathematics at Ve- nice ; and here, except during an interval of eighteen monthis at Brefcia, he remained till the time of his death, in 1557. His works are numerous. Befides tranflations of Archi- medes and Euclid, he wrote many original treatifes in ma- thematics, one of the moft important of which, entitled " Quefiti e' inventione diverfi," was publifticd at Venice in 1546, and dedicated to Henry VIII. of England. It is comprehended in nine books, and contams anfwers to feve- ral queftions that were propofed to him at different timee concerning mechanics, hydroftatics, &c.; and more pai'ticu- larly worthy of notice is the hiftory of the invention of the rules for folving cubic equations, which he conununicatedto Cardan, under an oath that he wovild keep the fecrct. (See Algebra and Cardan.) Tartaglia's genius was wo lefs confpicuoufly difplayed in other fciences than in algebra. He treats of artillery and gunnery, and alfo of tlie different methods of fortifying towns, befides various mechanical and algebraical queftions. He alfo propofes many queftions with regard to the motion of bodies, and the metiiod of mea- furing diftances, in his " Nuovia Scienzia" and " De' Numeri e Mefure."- To Tartaglia we owe the fu-ft difcovery of the beft angle, ('. e. 45°, as it was then thought, for elevating a piece fo as to throw a ball or fhell to die greatell diilance. He iJfo annoiuiced a method of raifuig reffttls that were Q 2 fimk, TAR funk, and other heavy bodies, from the bottom of the fea, and the means by wlilcli a perfon may be enabled to remain a confiderable time under water ; and to him we owe a treatife on the figns which indicate changes in the atmofphere. He has hkewifc furnilhed us with a large treatife on arithtnetic, algebra, and geometry, piiblilhcd at Venice, in folio, in 1556. Tirabofchi remarks, that all Tartaglia's works ma- nifeft great penetration and acutenufs, and that they would claim tiigher commendation, if the author had paid more at- tention to his ftylc, and if the editions were more corrcftiy printed. But with all their imperfeftions and faults, and after all the improvements to which they have led the way, they were juftly eileemcd at the time when they were wT-itten, and they have been ufeful to thofe who have in more modern times purfued the fame courfe of lludy and inveftigation. Tirabofchi. Montucla. Hutton. Tartaglia is mentioned by Pietro della Valle among great Roman muficians in 1640, and the compofer of " Clearco," the firll opera that was performed at a pubhc theatre in Rome. For though feveral miiiical dramas had been exr.ibited in the palaces of ambaffadors and other great perfonages in that city, no theatre had been previoufly opened there for the public at large. TARTAGLINI, la Rosa, the daughter of Tibaldi, an excellent tenor finger in the fervice of the emperor at Vienna. She was extremely celebrated for her beauty and agility of voice, and quitted the ftage in 1768. TART A LA, in Geography, a town of Hindooftan, in Cahcut ; 21 miles E. of Paniany. TARTAN, in Sea Language, a fmall coafting vefTel navigated in the Mediterranean fea, and ha\-ing only one mall and a bowfprit, the principal fail, which is extremely large, being extended by a lateen-yard. When tartans put up a fquare fail, it is called a fail of fortune. TARTAR, Tartarus, or Tartanim, in Chemiflry, an acid concrete fait which rifes from wines, after complete fermentation, and flicking to the top and fides of the callcs, forms a cruft, which hardens to the confiftence of a Ilone. It is in this ftate a hard, brittle, brown-red mafs, inter- fperfed with imperfeclly cryftalli/.ed particles ; and called crude or rough tartar, or argol, by way of diftindlion from that which is purified. Its goodnefs rather depends on the number of repeated fermentations, which a fucceffion of new wines in the fame calks for fcveral years makes, than on the foil or climate where tlie wine is produced. The fwcct wines afford always lefs tartar than the (harp ones, and it is alfo lefs valuable. The tartar of Rhenifh wine is better than that of any other ; and in general thofe wines which have the moft acid in them, and which are the moft coloured and flrongeft-bodied, afford the greateft quan- tity of tartar, and tliat in the largefl cryflals. The tallc of tartar is vinous, and flightly acid. It is not entirely a product of fermentation, for it is contained in the " muft," or grape juice, and affifls in the procefs of fer- mentation, and the produftion of alcohol. This fait has alfo been found native, under different combinations, in fome other vegetable juices. Befides the ufual way in which tartar is produced, there is a very remarkable account in the Memoirs of tlie Aca- demy of Sciences at Paris, an. 1737, of its having been found in a more than ordinary beautiful ftate on a human ikull : the difcovery was owing to accident, and it was found that there had been lees of wine in the veflel in which the ikull had been laid ten days in foak. r A R The formation of the cryftds of this tartar on the ikuii» while the fides of the velFel had none created on them, (hews that tlic (lre powerfully than the operation of any en- tirely neutral falts. On this property is founded their utility in the cafe of dropfy. They occafion a confiderable dif- charge of ferous fluid into the bowels, which is thrown off in TARTAR. ■II the form of ferous ftools ; tlic difchargc by urine being alio augmented. The water in the cavity of the abdomen is thus rapidly caiTied oH" ; and the chances of a return of the difeafe are fuppofed to be fewer than when other diuretics are employed. It is remarked, that they do not readily pafs off by the kidnies, unlefs they are taken with a large quantity of water ; and, therefore, when intended as a diu- retic, they ought to be given in a liquid form, as Dr. Holme has dircded. It has been fuggefted, that, in cafes complicated with hepatic obftruclions, the efFefts of this remedy are very uncertain. It may be advantageoufly united with fquills ; and, on account of the exhauilion which it occafions, the ufe of it Ihould be followed by preparations of iron, and other tonics. As a purgative and hydragogue, the dofe is from jiv to 3vj, in the form of eleftuary ; and for the latter purpofe, this dofe muft be repeated until the kidnies are affefted ; diluting freely during its ufe. Thcfe falls enter feveral officinal compofitions : fuch as " carbonas potaffix puriffimus," Ed. Ph. ; " ferrum tartarizatum," L. D. ; " pulvis jalaps compoiitus," E. ; " pulvis fcam- monii compoiitus," E. ; " pulvis fennas compofitus," E. ; " potaffoe tartras," L.E.D. ; " autimonium tartarizatum," L.E.D. ; " foda tartarizata," L.E.D. Woodville. T. Thomfon. Tartar, Emetk. See Antimony. A confiderable diverfity has occurred in the method of pre- paring this tartar, probably from want of confidering, that the emetic quality of this preparation proceeds from the metallic earth being diflblved by the acid of tartar, and forming with it a kind of foluble tartar, a true neutral fait, no lefs capable of a very exa£t folution than the vegetable fait, the fait of feignette, and all the otlier foluble tartars. By confidering this faturation as a fixed point, tliere may be produced only one kind of emetic tartar, always equally ftrong. See a detail of M. Geoffroy's experiments on this uibjeft, in Mem. Acad. Par. for 1734. M. Beaume direfts it to be prepared by mixing together equal parts of cream of tartar, and of porphyrifed glafs of antimony, or rather a larger quantity of the latter ingredient. This mixture is to be thrown gradually into boiling water ; and the boiling muft be continued gently, till there is no efFervefcence, and till the cream of tartar be entirely faturated. The liquor is to be filtrated ; and when it is cooled, there will be formed in it fine cryftals, in the form of pyramids with triangular bafcj, which arc a foluble tartar perfectly faturated with glafs of antimony. Thefe are tranfparent while moiil ; but by ex- pofure to a dry air, they lofe a part of the water of their cryftalhzation, and become opaque and white. Emetic tartar thus prepared, very well produces an emetic effett when taken from a grain to two and a half, or three, accord- ing to the conftitution of the patient. The refult of M. Beaume's experiments on the manner and duration of boiling this preparation is, that veffels of iron and copper ought to be avoided, and thofe of filver or glafs ufed, hecaufe in thefe it may be boiled for any length of time, without being decompofed ; and that as the intention of the operation is to perfeftly faturate the cream of tartar, the boiling muil be continued till this faturation be effetted, which requires a long time, when the glafs of antimony is grofsly pounded, but a much lliorter time when it is well porphyrifed. Macquer, in the Chemical Dsftionary, ob- ferves, that we are not certain that the emetic tartar, pre- pared by faturating tartar with glafs of antimony, has always an uniform and conftant emetic power. And there- fore he recommends the powder of algaroth, or mercury of Ufe, which, however dangerous in itfelf, may be rendered fafe, by waflijng it with a little fixed alkali, which will fcparate all that marine acid that communicates to it a cer- tain degree of cauftic quality. The powder thus waflied, he fays, is altogether foluble by cream of tartar, and con- vertible into a foluble emetic tartar, perfcdlly neutral, by boiling it, and faturating it with cream of tartar, and treat- ing it iu the manner above direfted, for the preparation of emetic tartar with glafs of antimony. The powder of algaroth, tinis prepared, is a calx of antimony conftantly of the fame degree of emetic ftrength. The total eva- poration of the fluid appears to be the beft way of fecuring uniformity of ilrength to the medicine ; and the folubility of the compound affords one of the bell means for eftimat- ing its ftrength, or the degree of its impregnation with the antimony. Dr. Saunders relates, that an ounce of cold water, about the middle temperature of the air, diffolved, of fome of the common emetic tartars of the fhop, not thirty-two grains. or one-fifteenth of its own weight ; whereas of a well fatu- rated fort, which he had himfelf prepared by long boiling, ^ the fame quantity of water diffolved fifty-two grains, or near T one -ninth of its own weight. The beft way, probably, of obtaining a faturated and uniform preparation of this kind, would be to digeft the common emetic tartar in eight times its weight, or lefs, of cold water, and evaporate the filtered yellow folution to drynefs ; or to continue the boDing of the glafs of anti- mony and tartar for twelve hours, or longer, adding water occafionally to keep the tartar always diffolved, and at length to let the water wafte fo far, as not to exceed eight times the quantity of the tartai- employed, after which the hquor is to be fuffered to cool, and then filtered and evapo- rated. The dofe of this preparation, as an emetic, is from two or three to fix or eight grains. It may be given alfo as an alterative, or diaphoretic, in dofes of a quarter of a grain, or half a grain, or more, and added, in the quantity of a grain or two, as a ftimulus to the milder vegetable cathartics. Lewis's Mat. Med. by Aikin. Tartar, Foliated, is a preparation of tartar withdiftilled vinegar, which reduces it into white leaves. See Acetas PoTASs.'E, and Terra Foliata. Tartar of Iron. See Tartrite of Potafs and Iron. Tartar, OU of, is the fait of tartar expofed to the air for fome days in an open veffel, in a moift place, till it dif- folvc into a fluid ; though it is improperly called an oil, being no more than a diffolved fait. Oil of tartar per deliquutm is held the beft counter-poifon to corrofive fubhmate. Tartar, Regenerated. When cream of tartar has been made foluble by any alkaline fubftance whatever, it may be revived, or regenerated, into cream of tartar again ; its acid in this ftate has diffol-ved the alkaline matter prefented to it, and that has been itfelf attenuated in fuch a manner as to render it capable of infinuating itfelf between the mole- cules or integrant parts of the conftituent matter of the cream of tartar ; on this only depends the folubility of this preparation : and to render the whole of its primitive nature again, there requires no more than the addition of a new acid, which fliall free the tartar from this alkali ; but this muft neceffarily be ftronger than that naturally in the tartar. Thus fpirit of nitre, or oil of vitriol, regenerate the foluble tartar in a moment, as being more powerful acids than that in the cream of tartar, and therefore taking from it all its alkali. The acid of dillilled vinegar, which is not only a vegetable acid, but the fame with that of tartar, is alfo able to regenerate the foluble tartars. It might feem wonderful that this fhould be able to effeft this change without any fuperiority of force : but it is to be obferved, that in the cream TARTAR. cream of tartar the acid has a tcrrcftrial and alkaline bafis, which is natunJ to it in that form ; bnt in the ilate of folu- ble tartar it takes a new alkaline biifis, which is not natural to it : and when we view the proccfs in this light, it does not appear wonderful, that an acid of its own kind (hould be able to take away from it this artificial alkaline bafis, though it was not able to take from it the natural one. Mem. Acad. Par. 1733. This fecond or artificial bafis is diflerent, according to the different alkalies which have been employed to reudei the tartar foluble, and confequently the fame acid may attach itfelf more to one than to iuiotlier of thofe alkalies, or quit them the more or lefs eafily. There is one kind of foluble tartar, however, which is not to be regenerated at all; this is that which is made with borax. Dr. Huxham fays, he has often experienced the good effetts of regenerated tartar in the cure of obllnidlions of the bowels, and for (luggilli humours. See Acclale of Potajlj under Salts, and Terka Foliata. TAFiTAR, Salt of, is made of tartar waflied, ground, purified, or cream of tartar, and calcined either per fc or with nitre, by a reverberatory fire ; or it is made by pulveriKing what remains in the retort after the diilillation of tartar, and calcining it as above by a reverberatory fire. On the one or the other of thefe preparations, they pour a great quantity of hot water, to make a ley of it ; this they filtrate, and evaporate the liquor by a fand-heat, till the fixed lalt be found at the bottom of the veffel. This is the pure alkali, or fixed fait of tartar. See Carbonate of Potajh under Salts, and Salt of Tartar. Tartar, Soluble, (fee Tartrate of Potajh under Salts, and Tartrite of Potajlj,) may be made by the following procefs : Take of an alkaline fixed fait, a pound ; of water, a gallon ; and having ditfolved the fait in this water boiling, throw cryftals of tartar in powder as long as any fermentation is raifed, which ufually ceafes before thrice the weight of the alkali is thrown in. Then ftrain the liquor through paper, and after due evaporation fet it by for the fait to cryftallize, or elfe evaporate the liquor whoUy away, that the fait may be left dry. This fait, by the aftion of the alkali on the acid of tartar, being freed from thofe grofs terreftrious parts, with which the cryttals of tartar, how pure foever, remain ftill charged, diflolves readily, and keeps fufpended in cold water. The feveral alkaline falts, that of tartar itfelf, the common pot-afhes, borax, &c. all make a very good foluble tartar ; and not only thefe, but the common terreftrial alkalies, whe- ther of the mineral kingdom, as chalk or lime ; or of the vegetable, as the alhes of plants after ehxiviation ; or of the animal, as oyfter-fhells calcined or not calcined, and hartf- horn : all thefe give a better or worfe foluble tartar ; but of thefe, none fucceeds fo well as the oyfter-fhell, after it has been calcmed ; the foluble tartar, prepared with this, colls alfo greatly lefs than when prepared with fait of tartar. In wood-afhes there is always a part, which when mixed with water fwinis, and is fufpended in it a long time, and at length fubfides into a kind of foft and impalpable matter ; and another part, which fubfides readily to the bottom, and feels rough and harfh. It is the firil of thefe fubftances alone, which being mixed with cream of tartar, renders it foluble : the other part will not mix with the cream of tartar, or produce any fuch effeft, unlefs reduced to the nature of the firft, by repeated and violent calcinations, and then only a part becomes fo altered, the whole never is fo. It appears that the firft portion has been wholly diverted of its acid by the fire, and thence is become fufceptible of the imprelfion of the weakeft acid, fuch as is that of the cream of tartar, but in the fecond, or coarfcr part, the acid it natu- rally contained rem.iins fixed and concentrated, fo that it is not fufceptible of any imprefiion from the weak acid of the cream of tartar. Mem. Acad. Par. 1733. The different kinds of foluble tartar have alfo their dif- ferent degrees of folubility, or different rcadinefs to run \i\to a \\c\\\oT per deliquium. The mod eafily foluble of all arc thole made with chalk, with lime, and with wood-afhes ; and that which is moll difficultly fo, is the kind made with borax ; it will at length run however, and is truly foluble tartar. For the chemical and medical properties of this fait, fee Tartrate of PotaJI' under Salt.s, and Tartrite of PotaJJ}. Tartar, Vitrlolatett, which iowK ci\\\ magljlery of tartar, is a neutral fait, compoled of a vitriolic acid, faturated with the fixed alkali of tartar, or with any other pure vegetable fixed alkah. Vitriolated tartar may be decompofcd by nitrous acid in the following manner, according to M. Baume. Equal parts of both are put into a matrals, and heated till the fait be diffolved. From the liquor when eolJ, true crvllals of nitre may be obtained. And according to M. Margraaf, vitriolated tartar may, in the fame ntethod of treatment, be decompofed by marine acid. This fait is not of any ufe in the arts, and little ufed in chemiilry. It is chiefly employed in medicine. Like the other neutral falts, with bales of fixed alkali, ii is aperitive in fmall dofes, as a grofs, or 59igi"s., and it is laxative, when taken from 6 to 1 2 grofs. See Sulphate of Potajh under Salts. The chemifts have fometimes boafled of great virtues, in what they call the magiftery of this fait ; this is the earth precipitated in the making of it. It is the opinion of fome ingenious authors, that all fixed falts are produced by a blending together of the acid and alkaHne falts, which the plants they are obtained from originally contained, with fome earth. The making of this preparation of tartar and vitriol, gives great ftrength to this opniion by means of this magillery ; which (hews, that an earth neceffary to the cementing a mixture of an acid and an alkali into a neutral fait, may exiil even in one of the principles themfelves, though unfeen by us ; and that, as in the prelent inftance, in fo large a quantity, as not only to be fufficient for the combining the two volatile fubftances into a fixed one, but even to leave a remainder of it, that was not neceffary. While the acid of vitriol is poured upon the diffolved fait of tartar, or its oil per deliguium, for the making of this fait, during the great effervefcence between the acid and the alkali, there is a precipitation made of an earth, for the feparation of all which great care is to be had to the degree of faturation of the alkali with the acid. This earth after- wards may be fevered by filtration. This earth is precipi- tated, not out of the fpirit of vitriol, but out of the fait of tartar ; and this experiment fhews, that this fixed fait did originally contain that earth, which, according to the fyftem of the formation of fixed falts out of volatile ones, origin;dly refiding in plants, muft necelfarily be mixed with them, and which, not being able to mix with the acid, is feparated and thrown off in the conflidl, in which the acid mixes itfelf with the reft. This earth is what is pompoufly called the magijlery of -vitriolated tartar; but it is very wrong to give that name to an earth which has none of the properties of that or any other fait ; and they greatly deceive themfelves and their patients, who prelcribe it inftead of the fait itfelf. Its faline tafte, probably, has induced them to think that it poffefled great virtues ; but tliis ib not innate but adventi- tious. T A K tious, and the effect only of the fluid in which it was pre- cipitated : it cannot but have feme of the falts of that fluid hanging about it, when firil made ; but tliefc may, by re- peated wartings, be carried wluilly ofl', and tlie magiftery will then remain a pure iimple earth, and (hew itfelt to be no other than that earth, which may be properly called the earth of all fixed falts ; and which, though neceffary to give the fait of tartar its form as a lixivial fait, yet being not neceffary to it in its new form of a neutral fait, is depofited ill the making it into that form. It yet remains to be proved by more numerous experiments, that the fixed falts of plants owe that form only to a fixing earth, combining their two original volatile principles into a fixed mafs ; for if this be truly the cafe, there then needs no more to the volatilizing thorn again, but the divelling them of this earth. Phil. Tranf. N= 90. TARTAREOUS or Tartaric -^« The firft knowni mother-countrj- of the Turks or 1 artare lies fomewhcrc in the countries on the eallern and northern fides of the Cafpiar., where their defcendants arc ftill fituated. In ancient times they were fpread from the Oxus or Gihon into the Mongoley and the Orenburp; territory ; that is, in regions wliere they had conftantly ambitious and domineer- ing nations for their neighbours and enemies : on the E. the Chinefe ; on the S.W. the Perfians, Macedonians, Romans, Partho-Perfians, and Arabians ; and towards the N.E. the Mongoles. Here they ferved from time imme- morial as a mound againll the inciirfions of the nations which could penetrate from the E. to the W., or contrariwife, till at length the Mongoles, like a ruthing ftream that has burft its banks, fwept away all oppofition. The Tartars, fays baron de Tott, in his "Memoirs," (vol. i.) have the beil title to the higheft antiquity. To this purpofe h" obferves, that the flat high land of Tartary, which extends to the north, and the chain of the mountains of Caucafus and Thibet, continued almoft as far as the penin- fula of Cona, (if we may judge by the courfe of the water, which, from the centre of Afia, fpreads to the S. and to the N. of that part of the globe,) prefent the higheft portion of land which feparates the Indian feas from thofe of Kamt- fchatka. This obfervation, it is alleged, feems to prove, that the country at prefent occupied by the Tartars, muft have been the firft land difcovered in Afia, the firft in- habited, the firft fource of population, and the origin of thofe emigrations, which, conftantly repelled by the Chinefe wall, and the defiles of Thibet and Caucafus, have paffed from the north of Afia into Europe. (See Huns.) How- ever, the annals of the Tartars are involved in confiderable uncertainly before the time of Jenghis Khan, who was elefted grand cham (khan) by the chams of the different tribes, and was only chofen to be the king of kings, becaufe he was the moft powerful among them. It is well known, that Jenghis Khan conceived and executed projefts of ufurpation, by which he formed the moft extenfive empire known in hiftory. The Tartars began to acquire fome importance in hiftory, after the time of their fubjugation by the Mongoles ; but from the moment that their hiftory excites attention, it ceafes to be the hiftory of a pecuhar nation. Diftributed under the banners and commanders of the Mongoles, thefe enjoy with pofterity the glory of their conquefts, while the Tartars are conftrained to lend their name to the devaft- ations with which both nations every where marked the bloody progrefs of their armies. ( See Mongoles. ) Subju- gated in their conquered countries, and even forced from a great part of their old habitations, fome few of the Tartar hordes (few in reference to the whole Tartarian tribes,) have preferved their independence : ;'. e. thofe who inhabit the fouth-weftem part of the former Great Tartary, towards the Perfian, Indian, and Soongarian borders. Here we find the great Kirghifian horde, the Bukharians, the Khivans or Khivlnfcs, the Karakalpalis, Truchmenes, Tafchkantians, Turkeftans, Arabians, and fome other races, which ftill form diftinft ftates, and retain a kind of national liberty ; but they exift in fo feeble a ftate, that they are obliged to feek protcftion fometimes from one power, and fometimes ifrom another. The whole remnant of this nation, once fo great, fubfifts under foreign fovereignty. Many hordesbefong, either as fubjefts or as dependent wards of the RulTian em- pire ; others are, in like manner, appanages to the Ottoman Turks, or fubjeft to the Great Mogul, to China, and ta Perfia. Mr. Strahlenburg, a Swedifti officer, who refided fome years in Siberia, places them in fix clafles : the firft, con- taining feven diff^erent nations, all in the dominions of Ruffia, viz. the Mordvines, who dwell in the government of Nize- gorod ; the Tfcheremifies, or CzeremifTes, in the govern- ment of Kazan ; the Permians, in the government of Perm ; the Votiaks, in the government of Viatka ; the Vogouls, vvho dwell on both fides of the mountains, which formed a fepa- ration between Ruffia and Siberia ; the Oftiaks, who dwell on the coafts of the river Oby ; and the Barabintzi, who inhabit the country between Tara and Tomflc. The fecond clafs of people, called Tartars, includes the Budziaks, which dwell on the coafts of the Black fea ; the Crim Tartars, who inhabit the province of Taurida ; the Kuban Tartars, on the borders of the Kuban river ; and the Tartars of Dagheftan ; the Nogais, or Tartars of Aftrachan, of Kazan, and Upha ; the Bafchkirs and the Tartars about the towns of Tiumen, Tara, Tobolfl<, and Tomfk ; the Ulbeck Tartars, the Turcomans, the Kurguis, the Karakalpas, the Sayantzi, who dwell near the head of the Yenifley ; the Kir- ghifes, who occupy the mountains fouth of lake Baikal ; the Burats ; the Ariiitzi, who alfo inhabit near the fame moun- tain ; and the Yaktai, more to the north, on the fides of the Lena. The third clafs includes the Samoiedes, on the coaft of the Frozen fea, from Archangel to the Lena. The fourth clafs includes the Kalmucks and Monguls, who were formerly but one people. The fifth clafs includes the Mant- cheux and the Tungufes. The fixth clafs contains the favage nations on the north-eaft coaft of Afia, as the Tfchutki, &c. with the inhabitants of Kamtfchatka, and the Kurile idands. Of thefe, the firft, third, and fixth clafs are fubjeft to Ruffia, except that a fmall part of the fecond is independent. The fourth is partly independent, and partly fubjeft to China. The fifth clafs is wholly fubjeft to China. Abulgafi, in his account of the Turkifli ftems, mentions among them the Tartarian as one of the moft ancient and famous, and derives its origin from a khan of the name of Tatar. This ftem, which in procefs of time increafed to 70,000 families, was at firft governed by its own commander, and afterwards divided into various branches, difperfed into feveral and very diftant regions, by which difperfion their power was weakened. The moft confiderable branch fet- tled on the borders of Kitay (China), and fell under the fovereignty of that empire, againft which it frequently re- belled, and thereby gave occafion to ruinous wars. At the time of Jenghis Khan, fome Tartars dwelt on the Oxus or Amur, who were tributary to the emperor of Kin, reigning in Kitay. The Tartars who belong to the Ruffian empire inhabit the northern coafts of the Euxine and the Cafpian, the north fide of the mountains of Caucafus, the exte.nfive fteppes from the river Ural to the Soongarey, the fouthern Ural, in Siberia the fouthern frontier mountains and fteppes from the Tobol quite over the Yenifley, and the deferts in the middle region of the Lena ; and fome few Tartar colonies are dif- perfed among the Ruffian habitations, particularly in the governments of Upha, Kazan, and Tobolfk. Frequent me- morials are found in various regions of their ancient gran- deur, magnificence, and culture, fome of which are demon- ftrably of 1000 years' antiquity. The branches of this na- tion which belong to Ruffia are the proper Tartars, or the 8 dekendautt TAR deicendants of thofe two great Rates, which the fucceflbrs of Jenghis crefted on the Volga and in Siberia (fee Kapt- SCHAK, and the fequel of the article) ; the Nogayans, the Mefchtfcheryaks, the Bafchkirs, the Kirghifes, the Bucha- nans, the Yakutes, the Teleutes, and in part the tribes of Caucafus. The Kaptfchak Tartars are reduced to a fmall rcfiduc, intermixed among the Bafchkirs and Kirghifes. The Kazan Tartars are alfo a feeble remnant of what they for- merly were, and are difperfed in the governments of Kazan, Simbirdc, Riefen, Viatka, Penii, and Upha. The Ailra- chan Tartars are for the moft part Nogayans : they are dif- tinguifhcd into town, village, and tent Tailars. The firft dwell in Aftrachan, the fecond in fix villages near Altrachan, and the third wander about the Cafpian. In 1772, thofe of the two fonner clafles were only 1 200, and of the tent Tartars fcarcely 2000 kettles, or families. For the ftate of the Krim Tartars, fee Crimea. The ftems of the Siberian Tartars, who are numerous, are the Turalinzes, one of the firft colonies that became permanent in Siberia, when the Tai-tars fubjugated the country in the 13th century ; the Tobol- flvian Tartars, who dwell on the river Tobol ; the Tomfliian Tartars, who inhabit both fides of the river Tom, above and below the city of Tomfk ; the Krafnoyarflcian and Kufnetz- kian Tartars ; the Tartars of the Oby ; the Tfchulymfliian Tartars, inhabiting the territory along the river Tfchulym ; the Barabinzes, between the Oby and Irtilh ; the Kat- fchinzes, on the left (hore of the Yenifl'ey ; the Kiftim and Tulibert Tartars, on the left bank of the Tom ; the Biriuffes ; the Abintzes ; the Sayane Tai-tars ; the Beltirs, the Vercho- tomfkian Tartars, and fome other infignificant ftems. For the other branches of the Tartars who inhabit Ruflia, we refer to the feveral articles, Nogayans, &c. &c. The Tartars who are Mahometans bordering on Ruflia, but independent of that crovrn, take every opportunity of robbing their neighbours : tlie Kalmucks and Monguls are ▼ery different in their behaviour, living quietly on the produce of their foil, without doing injury to others. The Tartars of Afiatic Ruflia are likewife reprefented as a quiet, inof- fenfive people, living chiefly by the chafe and fifliing. See the following articles. See alfo Mandshurs, Mongoles, TUNGUSES, &c. TARTARY, or Tatary, a vague name, as it relates to AfiaticRuflia, whichcannot be ufed with precifionas defcrip- tive of any particular country : inftead of it might therefore be fubftituted names derived from the feats of the chief nations, as TungufiaorMandlhuriain theeaft, Mongolia in the centre, and Tataria in the weft. In a general fenle, however, whilft the name remains, it may include three diftinft countries, miz. Chinefe Tartary, Independent Tartary, and Ruflian Tartary. Tartary, Cb'mefe, according to the abbe Grofier's de- fcription, is bounded on the north by Siberia, on the eaft by the gulf of Kamtfchatka and the Eaftern fea, on the fouth by China, and on tlie weft by the country of the Kalmucks, who are eftabliftied between the Cafpian fea and Kafligar. The different tribes which at prefent inhabit it, were formerly comprehended under the general name of Mongul or Mogul Tartars, a warlike and formidable nation, who, on the one hand, conquered Hindooftan, under the famous Jenghis Khan, and on the other, fubdued China. It was in the 1 3th century that the Monguls took polfcflion of the latter empire ; but after having reigned there for 100 years, they were expelled by the Chinefe, in the year 1368. The fugi- tives took different routes ; fome went towards the Eaftern fea, and eftabhftied themfelves between China and the river Saghalien ; the reft returned weftward to their former coun- :ry, where, intermixing with the Monguls that remained. TAR they foon refumed their ancient manner of living ; thofe who fettled towards the eSft, having found the country almoft j deferl, and without inhabitants, retained tlie fame cuftom* whicli they had brought from China : hence thcfe two Mon- gul nations differ at prefent in language, government, reli- gion, and cuftoms. Thofe of the eaft retain their ancient name of Mongul, or Mogul Tartars ; the reft are known by the name of Mantchew, or Eaftern Tartars. Chinefe Tartary is therefore divided into two parts, the Eaftern and Weftcrn. Eaftern Chinefe Tartary extends, north and fouth, from the 41ft to tlie 55th degree of north latitude ; and eaft and weft, from about the i2otii degree of longitude, as far as the Eaftern lea. It is bounded on the north by Siberia, on the fouth by the gulf of Leao-tong and Corca, on the call by the Eaftern fea, and on the weft by the country of the Monguls. The Tartars who retired liithcr, after their expulfion from China, in the year 1368, immediately began to build cities, towns, and villages, and to cultivate the earth, after the manner of the Chinefe, among whom they had lived : iience the greater part of them have remained fixed, and are much more civilized than the reft of the Mongul nation. They were at firft governed by particular khans, each independent of the other ; but fince that of Ningouta (who was the moft powerful among them) took pofleffion of China, about the middle of the 1 7th century ; the emperor, who is ftill one of his defcendants, has reduced under his dominion all the other khans of this part of Tartary : this prince governs it imme- diately by himfelf, and fends thither governors and oflficcrs, as into all the other provinces of the empire. The country of the Mantchew Tartars is divided into three grand depart- ments : Chen-yang, Kirin, and Tcitcicar ; which fee refpec- tively. Ningouta, already mentioned, which is confidered as the cradle of the prefent imperial family, is furrounded by a wooden wall, confifting of ftakes, touching each other and twenty feet high, and alfo another pahfado without this, a league in circumference, and having four gates, correfponding to the four cardinal points. The Mantchew Tartar, who re- fides in it as lieutenant-general, extends his jurifdi£lion over the adjacent country, and all the villages of Yupi-tafe, and fome other petty nations that inhabit the banks of the rivers Oufouri and Saghalien, and along the fea-coaft. The Tartars of Yupi-tafe 'are peaceful in their difpofition, but ftupid and clownifti, without letters, and without any rehgious worfliip. They fow neither wheat nor rice, nor any thing elfe except tobacco, which they cultivate in fome of the fields furround- ing their villages. They are fupplied with fifti from the river Oufouri, and this is their only food : nor have they any clothes befides thofe which they make of their flcins, drelfed, dyed of three or four colours, and artfully fewn together with a thread cut from an exceedingly fine fliin. The wo- men fufpend from the bottoms of their long cloaks pieces of money and little bells ; and the trefles of their hair, which hang over their flioulders, are loaded with fmall mirrors, rings, and other toys. Of one part of their fifh, which they employ the fummer in taking with harpoons and fmall nets, they make oil for their lamps ; another fupphes tliem with food ; and a third part is referved for winter, when the ice prevents them from filhing. Beyond the Yupi-tafe Tar- tars arc the Ketchcng-tafe Tartars, who inhabit both banks of the r'wQT Saghal'ifii-oula (which foe), and extend as far as the Eaftern fea. Thcfe Tartars arc Icfs clownifti than the preceding, and employ much of their time in hunting fables. Tlie Mantchews, difperfed throughout Eaftern Chinefe Tartary, have neitlier temples nor idols ; they adore (as they exprofs it) only the " emperor of heaven," to whom they R 2 offer TARTAKY. nffcr facrifices : but fiiico tliey havi- entered China, fome of thera worftiip the ^'od " Fo," and other idols reverenced in the empire. When they became mafters of China, they pretended to a celeftial extraftion, and placed a god at the head of their race. Since the Tartars have had pofTefrion of the tlirone of China (fee Cms a), their language has become familiar at the court of Pe-king. This language they are very careful in prcfcrving, and it is faid that it may be much more eafily acquired than that of China. Although the Tartars have only one kind of charafters, they write them in four dift'erent ways, which they write with a pencil, or a kind of pen, formed of the bamboo reed, and which they can read with equal eafe when reverfed. Tartaiiv, Weftern Chincfi, is called alfo the country of the Mongoles, or Moguls ; for an accoimt of which, fee the article Mongoles. See alfo Kalkas, Kalmucks, and Ko- KO.voR. We fball here add that the country of the Ortous, who inhabit N. of the great wall, and W. of the Moguls pro- perly lo called, is i lo leagues in extent from E. to W., and 70 from N. to S. Thefe people are divided into fix ftand- ards, which comprehend 166 companies, each compofed of 150 heads of families. The Ortous are of a free difpofition, very lively, and never fubjeft to melancholy, and may be juftly called the " French of Tartary." Wild animals of various kinds are innumerable in the plains and forefts of Tartary. The country abounds with game, and all the animals that are hunted in Europe, with large flocks of yellow goats, wild mules, wild camels, and horfes ; an animal refembling the elk, a fpecies of lynx, whofe fkin is highly valued, tygers of prodigious fize and agility, whofe (lv.v.^AnV)0,\n Biography, an eminent poet, bom at Bergamo of an ancient and noble family in the year 1493, became an early proficient in tlie Greek and Latin claffic^. His uncle, the bithop of Recanati, who was his initruftor and patron, and fupphed the place of a parent when he loft his father, having been aflafllnated by robbers in 1520, Ber- nardo was under a necefllty of quitting his native city,- and in 1525 became feci'Ctary to count Guido Rangoni, genera! of the papaliarmy. Having been for a (hort time occupied in a fimilar fituation under the duchefs of Ferrara, he after- wards purfued his ftudies at Padua and Venice. la 15-; I he publiflied at Venice a volume of poems, which induced Fer» rante Sanfeverino, prince of Salerno, to invite him to his court. Having accepted this invitation, he recommended himfelf to the prince, and obtained annual flipends, amount- ing to 900 ducats. He accompanied his patron in feveral expeditions, and accompanying iiim to Naples, he there- married Porzia de' Roffi, a lady of noble family. At Sor- rento, whither he removed, he for fome time led a tranqui' and ftudious life ; until his patron, m 1547, incurred the dif- pleafure of the imperial court by concurring in prefenting a petition againll the eftabhfliment of the inquifition at Naples. On this occafion the prince joined the French party, fo that he was declared a rebel, and his property was confifcated. In- fluenced by refpeft for his patron, Bernardo accompanied him to France, where at firft he obtained encouragement, but being in procefs of time deprived of all fupport, and having loft his wife, lie requefted the prince's permiffion to leave him ; and complying with an invitation to the court of Gui- dubaldo H., dulie of Urbino, a diftinguifhed patron of literary perfons, he was liberally compenfated for his paft fufferings, and made a member of the celebrated Venetian academy. In 1563 he became fecretary at the court of Mantua, and in the fervice of this court he died in 1569, being then governor of Oftiglia. Tiie duke of Mantua caufed his remains to be honourably interred in that city, and a marble monument to be erefted over his tomb, bearing the fimple infcription, " Ofla Bernardi Taffi." Of his poems, belonging to the clafs of " Romanefque," there were two ; Ilia. " Amadigi," confifl;ing of roo cantos, and " II Floridante," left unfiniflied, but correfted and publifiicdby his fon Torquato, at Bologna, in 1587. His other works are five books of " Rime," with various kinds of poems, fuch as eclogues, elegies, hymns, odes, &c. He was alfo the author of " A Difcourfe concerning Pocti-y," and " Let- ters," of which an edition has been given in three volumes. Tasso, Torquato, pre-eminent as an Italian' poet, was the fon of Bernardo and Porzia de Rofli, born at Sorrento March II, 1544, and fent at the age of five years to the Jefuits' fchool at Naples. Here his proficiency was fo rapid, that in two years he recited, publicly, verfes and orations of his own compofition. At Bergamo, whither the circum- ftances of his family conftrained him to remove, he profe- cuted the ftudy of Latin and Greek with fuch fuccefs, that at the age of twelve years, he was admitted into the univer- fity of Padua. Here his proficiency in vaiious branches of literature was fo fignal, that in his feventeenth year he was honoured with degrees in the four branches of canon and civil law, theology, and philofophy. For law he had no predi- T A S predileftion ; but all the powers and affeftions of his mind were devoted to poetry. Thus dillinguifhcd, he was invited by tlie cdebrated Cefi to Bologna, in the fchools and aca- demies of which city his talents were eminently difplayed. During his refidence in Bologna, he was charged with having written fome defamatory verles, and deprived of his books ; and tliough he avowed his innocence, he thought proper to withdraw from the city to a place called Caftlevetro, where he was protefted by the count Rangoni. Some time after this event he fettled at Padua, and acquired diftinftion among the academicians denominated " Eterci." At the age of eighteen yeai-s he liad publifhed at Venice his poem of the Romanefque clafs, entitled " II Rinaldo," which he dedi- cated to cardinal Luigi d'Efte, in confequcnce of which he was invited, in 1566, to the court of Fei-rara, where he was liberally accommodated, and where, it is faid, he profecutcd the execution of his plan of the " Gerufalemme Liberata ;" fix cantos of which were compofed in the 17th year of his life. In IJ71 he accompanied the cardinal d'Efte into France, where he was honourably received by Charles IX. and his court, and alfo by all the learned men of Paris. In the following year he returned to Italy, and caufed to be re- prefented his dramatic paftoral of " Aminta." Several cantos of his " Gerufalemme" were at this time difperfed in Ms. throughout Italy, and in 1579 the fourth canto was printed in a coUeftion of poems at Genoa. In the following year, fragments of i6 cantos were pubhChed at Venice, and we may naturally imagine that this mode of introducing to public notice a work on which he had beftowed much atten- tion and labour, excited his difpleafure. In 1581 three edi- tions were printed, and of thefe, the third at Ferrara has been confidered as that which lirft exhibited this celebrated work in its genuine form. It has occafioned fome degree of fur- prife, that TafTo himfelf did not guard againft thefe incoiTeft publications, by committing his work to the prefs in a more perfeft ftate. His negligence in this refpeft has been attri- buted to fome mental malady under which he laboured. Of the caufe of this malady different accounts have been given. Tirabofchi has narrated a variety of circumllances, which operating on a mind like that of Taflb, might have contri- buted to produce, or at leaft to aggravate the mental dif- order under which he laboured. His narration is recited in the General Biography ; but within our limits we cannot do it full juftice. His firft provocation feems to have been ex- cited by a courtier, who divulged the fecret of his amours, in the prefence-chamber of Alfonfo, duke of Ferrara, and whom he publicly infulted, fo that he was under a necefllty of defending liimfelf with his fword againft the aggreffbr and his tlu-ee brothers. The brothers were banifned, and TafTo was confined to his apartment. Difturbed in his mind, and dreading worfe confequences, he made his efcape, wan- dered to Turiji, Rome and Sorrento, and at length obtained permifTion to return to Ferrara. Sufpefting fome hoftile de- iign, he withdrew to the court of Urbino, and again re- turned to Ferrara. Here his diforder was fo manifeft, that Alfonfo ordered him to be (hut up in a hofpital appropriated to lunatics. The evidence of his diforder is faid by fome to have been an indecorous hberty which he took in faluting the princefs Leonora, the duke's fifter ; but others have thought this circumftance very improbable, and indeed it is hardly ne- cefTary to make an attempt for juilifying the duke's condudt in the confinement of Taifo, after he had given fo many in- conteftible proofs of mental derangement. At length, how- ever, TafTo was reftored to entire liberty. But his difpofition to wander ftill continued ; and it is lamentable to refletl, that, as one of his biograpers obferves, " the admired author of ' Jerufalem delivered,' the favourite of princes and the boail 'J' A S of Italy, (Iiould have harboured in his mind fomctliing which defeated every plan to render his circumftances profptrous." His laft retreat was with cardinal Cinzio Aldobrandini, at Rome, wlio obtained for him a pcnfion from pope Cle- ment VIII., and had intended, as a compcnfation for his fufferings, to procure for him the honour of a folemn poeti- cal coronation in the Capitol ; but the ceremony was delayed on account of the cardinal's illnrfs, and TafTo manifefled fymptoms of approaching diffolution. As foon as he was apprized of his danger, he was removed to tlie convent of St. Onofrio, where, deriving every pofTible confolation from the kindnefs of the cardinal, and exliibiting every evidence of fmcere piety, he clofed his days in April 1595, at the age of 51. His remains were honourably interred, and after fome time a monument was eredted to his memory by cardinal Bonifacio Bevilacque, in the church of St. Onofrio. TafTo, " in perfon, was tall, aftive, and well-proportioned, naturally of a firm temperament, and fit for all bodily ex- ercifes. He was fparing of words, fedate and grave in manner, and in converfation difplayed little of the fire tiiat animates his works. He was kind and affeftionate in all his focial relations, and condufted himfelf with great propriety in company." His works are very numerous. Thofe in profe confift of a great number of treatifes, dialogues, and letters, on mo- ral, literary, and familiar topics. In poetry, his " Geru- falemme Liberata" is pre-eminent. " Its fubjeft is fmgu- larly happy, its charafters well-drawn and fupported, its fiiftions ftrongly imagined, its ftyle dignified, and its verfifi- cation harmonious." His " Gerufalemme Conquifata," pub- hfhed in 1593, was a kind of rccompofition of the former work, but lefs fatisfadlory to its readers. His " Aminta" has been already mentioned ; his " Rime" confifted of occa- fional and mifceUaneous pieces ; his " Sella Giornata," or Works of the Seven Days, pieces on facred topics, bear the imprefTion of the gloomy flate of his mind. Tirabofchi. Gen. Biog. Tasso, in Geography, a fmall idand on the W. coaft of Afi-ica, at the mouth of the river Sierra Leona. Tasso, or Thafo, an ifland of the Grecian Archipelago, "fituatcd in the gulf of Contefa, tov.ards the W. extreinity of Macedonia, and two leagues from the continent. The channel which feparates that ifland from the main land is alfo divided by a fterile inlet called " Little TafTo," and in Greek " Tafl'o-poulo," the veftige of an ancient continuity of lands, at prefent feparatcd. A fpacious road, where the ground is good for holding, hes between the two iflands. TalTo is the moft northern of the iflands of the Archipelago, and its high mountains, covered with forefts, are feen at a diftance. This ifland was formerly one of the moft famous for its rich gold mines. Herodotus fpeaks of them, and they were under the dircftion of Thucydides. Theic mines led the Greeks to denominate it Chryie, fignifying gold or gilt ; its riches had become proverbial, and tlic expreflioii was a " Thafos of wealth." Its natural troafuies alfo were opals, amethyfts, and other precious ftones ; but though thefe are loft, TafTo ftill furniflies the beautiful marble, that forms the greater part of the mountains, which was anciently- held in fuch eflimation by the Romans ; the whitenefj of which vies with fuow, and the fiuencfs of its grain with that of Parian marble. TJie inhabitants of Pai'os ai-e faid to have peopled tUe ifland of TafTo, and to have there built the town of Thafos, which was its capital, and the vefliges of which are ftill to be feen. The ifland is ueai- 30 leagues in circumference ; it produces abundance of corn, oil, wax, &c.; but the fertility, extolled by the ancients, is turned to no account for want of encouragement and cul- S 2 ture. T A S ture. Its wines, famous even in the time of the Lower em- pire, as Chryfollom exclaimed againft the cxceffes to which they gave rife at Conllaiitinople, have no longer the excellent qualities which eaufed them to fetch a high price. Its popu- lation has experienced the fame fate as the produftions of its foil ; it is confulerably diminiOied. TafTo, however, has Hill remaining a kind of wealth very important to a maritime and trading nation ; this is capital wood for ihip-buildmg. N. lat. 40'' 34'. E. long. 24'' 46'. TASSONI, AlessandRO, in Biography, an Italian poet and man of letters, was born of an ancient and noble familv, at Modcna, in the year 1565. Notwithllanding va- rious difadvantages in early life, fuch as the lofs of his pa- rents, a feeble difeafed frame, and the pcrfecution of ene- mies, he fuccefsfuUy cultivated Greek and Latin hterature, poetry, and eloquence. At the age of twenty he fought further improvement in the univerfity of Bologna, and here, as well as at Fen-ara, he directed his particular attention to jurifprudence. Being under a necedlty of feeking employ- ment, he went to Rome, where, being known by his writings, he was admitted into the fervice of cardinal Colonne, as fecre- tary, and accompanied him to Spain in the year 1 600. Being afterwards domefticated with cardinal Cefi, he be- came a member of the academics degli Umorifti and de' Lincei, and was held in high eftimation among the lite- rati of Rome. A fpecimen of his " Penfieri diverfi" (Thoughts on various Subjeds) was publifhed in 1608, un- der the title of " Queiiti," and the whole in 1612. His"Con- fiderations on Petrarch" were firft printed in 1 609, and were intended to reftrain the prevalent idolatry of this author. In 1613 he entered into the fervice of Charles Emanuel, duke of Savoy, in which fituation he was regarded as an enemy to the Spanifli monarchy ; and he was confidercd as the author of " Philippics" againlt the Spaniards, and of a book entitled " EfTequie della Monarchia di Spagna." In 1623 he quitted the family of Savoy ; and about this time he finiflied " A Compendium of the Annals of Baro- nius." In 1626 he was taken into the fervice of cardinal Lodonfio, nephew of Gregory XV.; and upon Iris death, in 1632, he was invited to the court of Francis I., duke of Modena, who gave him a penfion and fome honorary titles. Of this fituation death deprived him in 1635, at the age of 70. One of his biographers fays of him, that " he had a prepolTefiing countenance, with a cheerful expreffion, was open in convcrfation, a good fpeaker, ferious or pleafant, according to the occafion, of a hvely imagination, and found judgment." The work by which the memory of Tafloni is chiefly preferved is his mock heroic poem " La Secchia Re- pita." Tirabofchi. Gen. Biog. This penetrating and learned writer, in the tenth book of his " Penfieri diverfi," treats of mufic, ancient and modern, but not with hisufual acumen or feverity. He only retails the old {lories of its miraculous powers among the ancients, and tries to match them by wonders pretended to be performed by its inferior perfeftions in modern times, without any re- marks or refleftions which difcover a knowledge of the art, or doubts of the authenticity of thcfe relations. After fpeaking of extraordinary dilettante compofers of mufic in modern times, he fays, " among thefe we may enumerate James I., king of Scotland, who not only com- pofed facred mufic, but invented a new fpecies of plaintive melody, different from all others ; in which he has been imitated by the prince of Venofa, who, in our times, has embeUiftied mufic with many admirable inventions." This pafTage has given birth to two capital miftakes, into which the readers and writers of mufical hiilory have been led, particularly in Scotland. Li the firft place, it in- 6 T A S finuates that James I. was the inventor of the national melo' dies of that country ; and fecondly, that tiiefe melodies had been imitated in Italy by the prince of Venofa, a voluminous and celebrateddilettantecompofer of madrigals in the fixteentli century. Unluckily for the favourers of thefe opinions, the Scots' national melodies can be proved of much higher antiquity, not only than David Rizzio, but the time of James I. See Rizzio, Ja.mes I. of Scotltiitd, and Ossian. And the prince of Venofa, who was not the great mufi- cian he was reported to be by learned men w ho were ignorant of mufic, has not in all his works, which we have carefully- examined, a fingle paffage of melody which reminds us of the national tunes of Scotland ; the melodies of which re- femble thofe of no other country with which we are ac- quainted, except thofe of China. See Venosa, and Chinese Mufic. Another Aleffandro Tafloni of Modena, born in 1488, made a compilation of the different annals of that city, pub- lifhed in Muratori's Colleftion of Italian hiflorians. TASSOW, in Geography, a town of Moravia, in the circle of Iglau ; 30 miles S.E. of Iglau. TAS8U, a town of Perfia, in the province of Adir- beitzan ; 60 miles W. of Tauris. TASTATURA, Ital., the whole range or fet of keys, in an organ, harpfichord, virginal, fpinet, clavichord, or piano-forte. The term is naturally formed from tajlo, a touch, or key. The Italians, we believe, call tl«; finger- board of the lute, guitai", viols, and all ftringed inftrumcnts with a neck that is fretted, the tajlatura. TASTE, Savour, a fenfation excited in the foul by- means of the organ of tafte, m-x.. the papillae of the tongue, &c. Dr. Grew, in a lefture on the diverfity of taftes, befbre the Royal Society, diftinguiflies them into ftmple and com- pound. By ftmple taftes he underftands fuch as are fimple modes of tafte, although mingled with others in the fame thing : thus, the tafte of a pippin is aci-dulcis ; of rhubarb, amar-aftringent, and therefore compounded, in both ; but yet in the pippin the acid is one fimple tafte, and the fvveet another, as diftinft as the bitter and aftringent are in the rhubarb. Two faults, he obferves, have here been committed : the firlt, a defeftive enumeration of fimple taftes ; the fecond, a reckoning of them indiftintlly among fuch as are com- pounded. Simple taftes, of which we ufually only reckon fix or fcveji forts, are at leaft fixteen : i. Bitter, as in v^formwood ; whofe contrary is, 2. Sweet, as in fugar. 3. Sour, as in vinegar ; whofe contrary is, 4. Salt. 5. Hot, as in cloves ; to which is oppofed, 6. Cold, as in fal prunellas ; for we may as properly fay a cold tafte as an hot one, fince there are fome bodies which do manifeftly imprefs the fenfe of cold upon the tongue, though not to the touch. 7. Aromatic ; to which is contrary, 8. Naufeous, or malignant. 9. Scft, which are either vapid, as in water, ftarch, whites of eggs, &c. or unftuous, as in oils, fat, &c. 10. Hard, of which he reckons four kinds. 1 1 . Penetrant, which worketh itielf into the tongue without any pungency ; as is found in the root and leaves of the wild cucumber. 12. Stupefacient, as in the root of black hellebore, which, being chewed, and for fome time retained upon the tongue, affefts that organ with a numbnefs, or paralytic ftupor. 13. Aflringent, as in galls. And, 14. Pungent, as in fpirit of fal armoniac ; which two laft taftes he makes contrary to the unftuous, as penetrant and ftupefacient ai-e contrary to the vapid one. The TASTE. The compound taftcs are very numerous ; but we have Xvords to exprefs but fix of them: i. Aujlcre, which is ailringent and bitter, as in the green and foft ftones of grapes. 2. Acerb, properly fo called, which is ailringent and acid, as in the juice of unripe grapes. 3. Acrid, which is pungent and hot. 4. Muriatic, which is fait and pun- gent, as in common fait. Lixivious, which is faltnefs joined with fome pungency and heat. 6. Nitrous, which is falt- nefs joined with pungency and cold. Tail ■ conftitutes one of the moft obvious characters of bodies, and much is to be judged from it of the nature of many things. Dr. Abercromby, in a treatife partly written on this fubjedl, has carried his obfervations fo far, as to lay down a fet of rules for the judging of any plant, or other body, without knowing what it is, merely from its tafte, in regard 10 its virtues in medicine. In order to judge of what he exprefsly means by the names of the feveral taftes, it is proper to add the liil: of them, with fome of the things to which they are applied. Plants, fruits, &c. are eitiier four as the common forrcl, harlh as the medlar, auftere or rough as the quince, fweet as the fre(h juice of ripe grapes, fat and oily as the fefamum, bitter as gentian or the wild cucumber, fait as common fea- falt, tart as garlic, or, laftly, infipid as the gourd, or of lome mixed talles, made of two or more of thefe. The har{h or acerb things are cold, repelling, and bind- ing, hardly concofted, and they may all be known upon the tongue by their contradling or drying it. The auftere or rough things differ from thefe only in degree, as being fome- what milder in tafte, and weaker in virtues. The four or acid things are always cooling ; but this never to excefs, by reafon of their penetrating parts : this tafte is known by a biting on the tongue, but without any heat. Sweet things are all nutritive ; and taking the word in its proper fenfe, they only have this quality. Their fweetnefs arifes from their neither being too hot nor too cold upon the tongue. Fat things are moderately hot, and, on this account they all, in fome degree, moiften and relax ; but they alfo ob- ftruft : they are known from the fweet things by filling, and, as it were, anointing the tongue, without giving that fenfe of pleafure that the others do. Salt things are aftringent and deterfive ; the one quality they have from their earthy part, the other from their watery. Bitter things may be very beneficial to the ftomach ; but, in improper cafes, they may alfo do hurt. The pungent bitters, fuch as the elaterium, or wild cucumber, are all hurtful, unlefs rendered fafe by other means. Tart things are hot, and often bad for the head, but good in heavy and phlegmatic conftitutions : they are known by their heat in the mouth. Laftly : infipid things in general have no peculiar quahty, but are cold and watery ; they are generally hurtful to the ftomach, unlefs mixed with hotter and fpicy things. Aber- cromb. Nov. Medic. Clavls. It is obferved by fir John Floyer, that the tafte is fo good a judge for us, that all the chemical principles in plants may be difcovered by it, before their diftillation. All watery plants (hew their phlegm, as well to the tafte as by diftilling ; and in all dry woods, the tafte difcovers the earth they con- tain, as well as a chemical analyfis ; by the mucilaginous and gummy tafte, and by the manifeft oilinefs in fome plants, we diftinguiih their abounding in oil as well as by the retort. The fmell alfo helps us greatly in an extemporary judging of plants, and we ai'e able to declare upon the fpot, that all the aromatic plants, and all the fetid ones, contain a large quantity of a volatile oil and hJt. By the acrimony and pungency, we are the Conqueror to Eudo, one of his Norman followers, whofe defcendants affumed the name of TAtterfhall, from this place. Robert Fitz-Eudo obtained a grant from king John, for the inhahitants of the town to hold a weekly market : and another of the family, in the time of Edward III., received the royal licence to ereft a caftle within his manor of Tatter- fhall. But the prefent fortrefs was built by fir Ralph, after- wards lord Cromwell, treafurer of the Exchequer to Henry V I . The caftle and manor were granted by Henry VII. to Margai-et, countefs of Richmond, and entailed on the duke of Richmond ; who dying without iflue, they were granted by Henry VIII. to the duke of Suffolk ; and in the * next reign pafTed to Edward, lord Clinton, afterwards I eail of Lincoln. By marriage with an heirefs oi the CUn- tons, they are now in the pofleffion of lord Fortefcue. The caftle ftands on a level moor, and is furroundtd by two great foffes, the outer one formed of earth, and the inner faced with brick, ten feet deep. It was originally intended as a place of defence, and was progreffively raifed to great height and extent. In the civil wars it was, however, dilapidated. TiU vei-y lately the principal gateway was remaining : the part at prefent left ftanding, is a fquare tower of brick, flanked by four oflangular embattled turrets, which are crowned with fpires covered with lead. It was divided into four ftories. The main walls were carried to the top of the fourth ftory, where a capacious machicolation furrounded the tower, on which there is a parapet wall of great thicknefs. This was to proteft the perfons employed at the machicolations. The tower is conftrufted upon ponderous groined arches, which fupport the ground-floor. Near the outer moat ftands the parifh church, a beautiful and fpacious edifice, built in form of a crofs. Few churches, perhaps, have fuffered more dilapidations than this. It confifted of a nave, having five large arches on a fide, and eight clereftory windows, placed in pairs ; on each fide is a tranfept, and a magnificent choir. , The windows of the latter were glazed with ftained glafs, which was removed, by a late earl of Exeter, to the chapel of Bur- leigh, on condition that he replaced it with plain glafs, which could have been done for the fum of forty pounds ; but this being neglefted, the infide has fuffered greatly from the weather ; although the walls, roof, and pavement remain almoil entire. The ruined fcreen and ftalls of wood, richly carved, are ;iImoft rotten : behind it is a ftone fcreen, in the arches of which are painted figures. The body of the church and tranfepts had their vrindows richly adorned with the legendary hiflories TAT liiftories of Romift faints. Before the altar lay two rich fcrafs figures of Ralph, lord Cromwell, who died in 1455, and ci' Marg.iret his wife, wlio died in 1453. This nobleman, in the feventeenth yen.r of Henry VI., obtained a licence to make the church of Tatterflinll collegiate, for a matter or warden, fix priefts, fix fccular clerks, and fix choriflers. He alfo founded, near the church-yard, .an hofpital or alms- houfe, for thirteen poor men and women. At the dilfoliition, the collegiate revenues were granted to Charles, duke of Suffolk. The hofpital Hill remains, with a fmall endow- ment. The population report of the year 1811, Hated that Tatterfliall contained 506 inhabitants, occupjnng 105 houfes. The market is held on Tuefdays, and there are three fairs annually, — Beauties of England and Wales, vol. ix., Lineoln,- ihire.byJ.Britton, F.S.A. Hiftory, &c. of Tatterfhall, with plates, 8vo. 1801. TATTICOMBA, a town of Hindooflan, in Myfore ; 4 miles N. of Dindigul. TATTO, Ital. from Tamils, Lat. in Aliific, implies a meafure, or bar, the period when the hand or foot is beaten down in marking the time. See Tactus, and Battuta. TAT-TOO, q. d. Tap-to, a beat of a drum, at night, to advertife the foldiers to retreat, or repair to their quarters in a garrifon, or to their tents in a camp. See Retreat. TATTOOING, in Modem Hiflory, a name given at Otaheite, and other iflands of the South fea, to the operation of ftaining die body. For this purpofe they prick the fliin, fo 2S juft not to fetch blood, with a fmall inftrument, fome- what in the form of a hoe, or blade of a faw : that part which anfwers to the blade is made of a bone or fliell fcraped very thin, and from a quarter of an inch to an inch and a half Avide : the edge is cut into Iharp teeth or points, from the number of three to twenty, according to its fize. When this .is to be ufed, they dip the teeth into a mixture of a kind of lamp-lack, formed of the fmoke that riles from an oily nut which they burn inllead of candles, and water, or charcoal- dull diluted with water ; the teeth, thus prcp.ircd, are placed upon the fkin, and the handle to which they are laftened, being ftruck by quick fmart blows, with a (lick fitted for the purpofe, they pierce it, and at the fame time carry into the punfture the black compofition, which leaves an indelible llain. This operation is performed upon the youth of both fexes, when they are about twelve or fourteen years of age, in fever.il parts of the body, and in various figures, according to the fancy of the parent, or perhaps the rank of the party. The women are generally marked with this ftain in the form of a Z, in every joint of their fingers and toes, and fre- quently on the outfide of their feet : the men are alfo marked with the fame figure ; and both men and women have fquares, circles, crefcents, and ill-defigned reprefentations of men, birds, or dogs, and various other unintelhgible devices, im- preffed upon their legs and arms. But the part on which thefe ornaments are lavifhed with the greateft profufion ta the breech ; this, in both fexes, is covered with a deep black ; above which, arches are drawn over one another, as high as the ftiort ribs. Thefe are often a quarter of an inch broad, and the edges are indented. Thefe arches are exhi- bited, both by the men and the women, with fingular often- tation. The face in general is left unmarked. Some old men had the greateft part of their bodies covered with large patches of black, deeply indented at the edges, like a rude imitation of flame. It is only at New Zealand, and in the . Sandwich iflands, that they tattoo the face. There is alfo this difference between the two laft, that, in the former, it is done in elegant fpiral volutes, and in the latter, in ftraight lines, crofling each other at right angles. The hands and £j"ms of the women are very neatly marked, and they have 6 T A T among them a fingular cuftom, tlic meaning of which could not be learned, th,at of tattooing the tip of the tongms of the females. This cuAom of t.attooing, it is apprehended, is fn qnently defigned as a fign of mourning on the death of a chiif, or any other calamitous event. Pc rfons of the loweft clafs are often tattooed with a mark, that diftinguilhet them as the property of the feveral chiefs to whom they be- long. Hawkefworth's Voyages, vol. ii. p. 189. Mar- chand's Voyage, vol. i. p. 99. Cook's Third Voyage, vol. iii. p. 155. TATTUBT, anciently Taditti, in Geography, a town of Algiers, formerly a confiderahle city, now almoft com- pletely in ruins : fome beautiful granite pillars were dug up ionie years ago, and placed in a niofque at Conftantina ; 25 miles S. of Conftantina. TATU, in Ancient Geography, an ifland fituated in the Nile, in the vicinity of the town of Meroe. Pliny. Tatl', in Zoology, the Brafilian name for the armadillo, or niell-lu dge-hog, or dajypus of Linnieus. See Dasvi'I's. T :\Ti:-j-Ipar(i, the name of a creature of the armadillo kind, being the three-banded or triciniliis dafypus of Lin- njeus. See Da.syi'US. This animal burrows under ground, keeps its hole in the day, and rambles out at night : when it would fleep, or when it is afraid of being taken up, it contrafts its cruft into a round figure ; and hiding its whole body within, it might fooner be taken for a fea-(hell than a land-animal. It is hunted with little dogs, .feeds on potatoes, &c. drinks much, grows very fat, and is reckoned dehcious eating when young, but when old, has a mufky difagreeable tafte ; breeds every month, and brings four at a time. Ray and Pennant. TATV-MnJellims, the IVeafel-headcd ylrmadUlo, the name of a Imall animal of the armadillo kind. This is the dafypus iwkhUliis of Linnoeus, and banded armadillo of Pennant : it has a very flender head, fmall ereft ears, the cruft on the Ihouldcrs and rump confifting of fquare pieces ; eighteen bands on the fides ; five toes on each foot ; length from nofe to tail about fifteen inches ; the tail five and a half. It in- habits South America. Ray, Pennant, and Grew's Muf. Reg. Soc. p. 19. "VATV-Paba of Brafil, is the fix-banded dafypus of Lin- na;us, having the cruft of the head, flioulders, and rump, formed of angular pieces, and between the bands, and alio on the neck and belly, a few fcattered hairs ; the tail thick at the bafe, tapering to a point, and not fo long as the body, and five toes on each foot. It inhabits Brafil and Guiana. Pennant. TA'VV-Porcinus, the name of the pig-headed armadillo, or nine-banded dafypus of Linnveus, with long ears, cruft on the head, flioulders, and rump, marked with hexangular figures ; the nine bands on tlie fides diftinguiflied by tranf- verfe cuneiform marks ; breaft and belly covered with long hairs ; four toes on the fore -feet, and five on the hind ; the tail taper, and a little longer than the body ; and length of the whole animal three feet. This animal inhabits South America : and one, that was brought into England a few years ago from the Mofquito (hore, was fed with raw beef and milk, but refufed our grains and fruit. Pennant. TATUETE, the name of a fpecies of tatu, or arma- dillo, being the nine-b;uided dafypus of Linnxus, though BufFon and Pennant afcribe to it only eight bands ; it has upright ears, two inches long ; fmall black e)Ts ; four toes on the fore -feet, and five on the hinder ones ; the length from nofc to tail about ten inches, the tail nme : it is of an iron colour on the back, and whitifh at the fides ; its belly alfo is whitifh and naked, except for a few hairs. It inha- bits Brafil. The T A V The flefh of this is accounted more delicious than that of «uy other creature of this kind, though they may all be eaten. Ray and Pennant. TATULA, in Botany, a name ufcd by Clufius, and fome other authors, for the ftramonium, or thorn-apple. TATZO, in Geography, a town of Hungary ; 40 miles E. of Munkacz. TAU, in our Jncient Cujloms, fignifies a crofs. " Tradendo difto comiti Thau eboreum." So Mr. Seldcn, in his notes upon Eadmcrus, p. 1 59. " Ego Eadgifa prse- difti regis ava lioc opus cgregium crucis Taumate confoli- davi." See Mon. tom. iii. p. 121. Tau, in Entomology, a fpecies of beetle. See ScARA- B.*:us. — Alfo, a fpecies of Phahna bombyx. — Alfo, a fpecies of Mufca. Tau, or Taw, in Heraldry, an ordinary, in figure of a T, fuppofed to reprefcnt St. Andrew's crofs, or a crofs potence, the top part cut off. It is thus called from the name of the Greek T, tau. Tau, \n Ichthyology, a fpecies of Ga^w ; which fee. TAUA, ill Jncient Geography, a town of Egypt, and the metropolis of the nomc Phthemphthus. Ptol. and Steph. Byz Alfo, a town of Afia, between Namaris and Augara. Ptol. — Alfo, a gulf of the ifle of Albion, on the fouth-eallcrn coaft. This eftuary is the firth of Tay. Taua, in Geography, a town of Egypt; 12 miles S. of Denutar. TAVACCAR.S, in the Materia Med'ica, the name by which many authors call the coccus Maldimt, or Maldive nut. TAUAG, in Geography, a town of Perfia, in Farfiftan ; 39 miles S.E. of Bender-Rigk. TAVAI, an ifland in the Indian fea, near the coaft of Siam, about 20 miles long and 3 broad. N. lat. 1 3'^. E. long. 97° 52'. Tavai, a town of Afia, in Lower Siam ; 148 miles S. of Martaban. N. lat. 14° 10'. E. long. 98° 12'. Tavai Point, the extreme point of a traft of land on the coaft of Lower Siam. N. lat. 13° 40'. E. long. 98°. Tavai or Tovy Poenammoo, the fouthernmoft of the two idands into which New Zealand is divided by Cook's ftrait, which is for the moft part mountainous and apparently barren, and in this refpeft of a lefs favourable afpeft than the other ifland, or Eaheinomautue ; which fee. The ftraits, which are about four or five leagues broad, were difcovered by Capt. Cook at the clofe of the year 1769. The iflands are fituated between the latitudes of 34° and 48° S., and be- tween the longitudes of 181" and 194° W. Tavai- Poenam- moo is faid to be 500 miles long from S.W. to N.E., and from 55 to 140 broad. See Ne-w Zealand. TAVANAGUROY, a town of Hindooftan, in Myfore ; 13 miles W. of Colar. TAVARADO, a town of Portugal, in the province of Beira; 7 miles W.S.W. of Montemor o Velho. TAVARES, a town of Portugal, in the province of Beira ; 1 3 miles E. of Vifeu. TAVASTLAND, a province of Sweden, bounded on the N. by Eaft Bothnia, on the E. by Savolax or the go- vernment of Kuopio, and the Ruffian government of Vi- borg, on the S. by Nyland, and on the W. by the govern- ment of Abo, or Finland Proper ; about 150 miles in length from N. to S., and from 35 to 100 in breadth from E. to W. The country is very fertile, and confifts of fine plains, watered by a great number of rivers and lakes, which abound in firti. It is divtrfified with arable and mea- dow lands ; fo that with refpeft to ihefe natural advantages, it may not only be looked upon as the beft part of Finland, TAU but is indeed fcarcely furpafled in thofe particulars by any province in Sweden. It is likewife ftored with cattle, fifti, and all forts of game. But notwithftanding this country is fo fertile, it is far from being well cultivated ; and, confe- qucntly, the peafaut* are generally very poor. Sometimes, indeed, the corn is much damaged by keen and unexpefted fr,ofty nights. The northern part of Tavaftland is more mountainous and woody than the fouthern. In the morafles and uncultivated fandy wilds, a ferruginous earth is dug up, from whicli the Eifenfand ertz, or iron fandy ore, as it is called, is prepared. The inhabitants lubfift" by agriculture, grazing, and breeding of cattle, and fome of them are em- ployed in the fiflieries. They alfo traffic in corn, peas, beans, flax, hemp, dried fifh, cattle, leather, tallow, but- ter, lime, the bark of trees, &c. TAVASTHUS, or Kroneborg, a town of Sweden, and principal place in the province of Tavaftland, built in the year 1650, on a pleafant fpot, by count Pehr Brahe, and endowed with confiderable privileges. In 1713, this town was taken by the Ruffians ; and in the laft war between them and the Swedes, it was laid in afhes. The caftle, which, exclufive of the town, is properly called " Tavaf- thehus," or " Tavafteborg," is well fortified, and ferves for an arfenal and royal magazine ; 80 miles N.N.E. of Abo. N. lat. 6i°l'. E. long. 24° 15'. TAVAVIS, or Thaouaouis, a town of Afia, in Grand Bucharia ; 15 miles N.E. of Bucharia. TAUBATE', a town of Brafil ; 130 miles W. of Rio Janeiro. TAUBE, Frederick William Von, LL.D., in Bio- graphy, was the fon of Dr. Taube, phyfician to queen Ca- roline, confort of George II., and born in London in the year 1728. After the queen's death, the father fettled at Zelle, where he died in 1 742 ; and in the following year his fon was entered at the univerfity of Gottingen. Here he affiduoufly applied to the ftudy of jurifprudence ; and before he left the univerfity, being in his 19th year, he publiftied a diflertation " De Differentiis Juris civilis a jure Naturae," intended to prove that the principles of the Ro- man, Canon, and German law were contrary to the law of nature, and inconfiftent with the rights of man. When he quitted the univerfity, in the year 1747, he travelled into fo- reign countries, and particularly through fome parts of Africa and America. On his return he praftifed the law at Gottingen, but finding, in confeqiience of fome dif- pleafure which he had excited by the freedom with which he cenfured the tedioufnefs of law-fuits, that he had no profpeft of advancement, he removed to Vienna in 1756, where he obtained fome preferment in the army. Soon after an en- gagement in which he was wounded during the feven years' war, he abandoned Lutheranifm, and embraced the tenets of the church of Rome, hoping thus to rife in the Imperial fervice. Having given proof of his talents and fidelity in an honourable office, which he occupied, and being ac- quainted with the Englifli language, he was appointed fecre» taiy to the Imperial ambaffador at the court of London, and repaired hither in Oftober, 1763. Here he married a niece of the celebrated Dean Tucker, with whom he lived in habits of intimacy and friendlhip. In 1766 he returned to Vienna, and was appointed fecretary to the council of trade, which was an office of great fatigue, on account of the journies which it obliged him to take to diftant places. When this college was diffolved, in 1776, he retired to Bruf- fels. Having fulfilled another confidential commifTion with which lie wasentrufted, he returned from Belgrade to Vienna in 1777, and was ennobled by the emperor, and appointed a member of the government of Lower Auftria. His iiealth being T A U T A V being much impaired, required an attention which it did not fuit his inclination or occupation to give it : liis diforder, which was an inflammation of the lungs, incrcafed, and ter- minated his hfe in June, 1778, in the 50th year of his age. He was juilly honoured for his integrity, his zeal to ferve Jus friends, and his liberality. His Utcrary labours evince the extent of his learning and refcarches. His principal works are the traft already mentioned ; " Thoughts on the prefent State of our Colonies in America, on their Behaviour to the Mother-Country, and on the true Intereft of the Na- tion in regard of the Colonies," London, 1766 ; " Hiftori- cal and Pohtical Sketch of the prefent State of the Englifh Manufailures, Trade, Navigation, and Colonies, &c." 1774, 8vo. ; " Hiilory of the Englifh Trade, &c. from the ear- lieft Periods till the Year 1776, with an authentic Account of the true Caufes of the prefent War \vith North Ame- rica," 1776, 8vo. ; " J. J. Schetzen's Elements of Geo- graphy, improved and enlarged," 1786, Bvo. ; " Hiilorical and Geographical Defcription of the Kingdom of Sclavonia and Duchy of Syrmia, Sec. in three parts," 1777, 1778; " An Account of various New Difcoveries, made in 1776 and 1777, in Sclavonia, &c. &c." Leipfic, 1777, 410. He contributed alfo, between the years 1773 and 1778, to Buf- ching's periodical publications. He alfo communicated to the Royal Society of London " A fliort Account of a par- ticular Kind of Torpedo found in the River Danube, with feveral Experiments on that Fifh," publifhed in the Phil. Tranf. for 1775. Gen. Biog. Taube, in Geography, a river of Weftphalia, which runs into the Aland, near Seehaufen. TAUBER, a river of Germany, which rifes about eight miles S. of Rotenburg, in Franconia, and runs into the Maine at Wertheim. Taubek See, a lake of Bavaria ; 6 miles W. of Berch- tefgaden. TAUCAEL, or Tuchel, a town of Pruffian Pome- relia. This town was taken and burned, in the year 1320, by the Teutonic knights, and afterwards rebuilt ; 44 miles S.S.W. of Dantzic. TAUCHA, a town of Saxony, in the circle of Leipfic. This town was built in the year 1221, by Albert, arch- bifhop of Magdeburg, afterwards rebuilt, and in the year 1 43 1 deftroyed by the Bohemians and Huflites, when moll of the inhabitants removed to Leipfic ; 6 miles N.E. of Leipfic. N. lat. 51° 22'. E. long. 12'^ 30'. TAUCHIRiE, in Ancient Geography, a town of Africa, in Libya, belonging to the territory of Barce, according to Herodotus, afterwards called Arfinoe. M. D'Anville lup- pofes that it is the prefent Teukera. TAVDA, in Geography, a river of Ruffia, which rifes in Pelim lake, and runs into the Tobol, 40 miles S. of Tobolflc. TAUDECOND A, a town of Hindooftan, in Golconda ; 25 miles S.W. of Warangole. — Alfo, a town of Hindoo- ftan, in Dindigul ; 7 miles N. of Dindigul. TaUDENNY, or TuDENNY, a Moorifh and Negro town or village, on the borders of the Defart in Africa ; at which place are large ponds or beds of fait, which both the Moors and Negroes purchafe, as well as dates and fig-trees of a large fize. The falt-beds are about 5 or 6 feet deep, and from 20 to 30 yards in circumference. The fait comes up in red lumps mixed with earth, and part of it is red ; 270 miles N.N.W. of Tombuftoo. N. lat, 21" 15'. W. long. 1° 25'. TAUDOON, a town of Hindooftan, in Lahore ; 34 miles S.S.E. of Nagercote. TAVE, a river of France, which runs into the Rhone, about 6 miles below Loudon. Tave, or Taj", a river of Wales, which runs into the fea, near Llaugharn. — Alfo, a river, which rifes in two ftreams in the fouthern part of Brecknockfhire, and runs into the Severn below Cardiff. TAVERA, a town of Corfica, 18 miles N.N.E. ot Ajazzo. Tavera di Orta, a town of Naples, in Capitanata ; 14 miles S.S.W. of Afcoli. TAVERNA, a town of Naples, in Calabria Ultra, formerly the fee of a hifhop, transferred to Catanzaro ; 15 miles N. of Squillace. TAVERNER, John, in Biography, an eminent mu- Ccian, who flourifhed in the early part of the i6th century. He is often mentioned by Morley among our early contra- puntiils, and by Anthony Wood, as having begun his career by being organift of Bofton, in Lincohithire. At tiie efta- blifhment of Cardinal college, now Chrift-church, Oxford, by cardinal Wolfey, he was appointed organift there ; but narrowly efcaped martyrdom for herefy, having held fre- quent converfations with fome Lutherans on the abufes of religion. They were all imprifoned in a deep cave under the college, ufed for tiie keeping of falt-fi(h, of which the ftench occafioned the death of fome of them, and fome were burnt in Smithfield. Taverner had not gone fuch lengths as many of the fra- ternity ; the fufpicions againft him were founded merely on his having hidden fome heretical books under the boards of the fchool where he taught, for which reafon, and on accoua* of his profeffional eminence, the cardinal excufed him, fay- ing " he was but a mufician," and fo he efcaped. A fet of books containing mafies and motets to Latin words, fome of which were compofcd in the time of Henry Vn., and all before the Reformation, is prefcrved in the mufic-fchool at Oxford. Thefe volumes contain com- pofitions by John Taverner, Dr. Fayrfax, Avery Burton, John Marbec, Wilham Kafar, Hugh Afhton, John Nor- man, John Sheppard, and Dr. Tye. The pieces by the three or four latt are entered in a more modern hand, with different charafters, and paler ink. The chief parts of the compofitions are tranfcribed in a large, diftinft, and fine hand and charafter ; but bars not having been yet intro- duced, and being all ad longam, alia breve, or in tempo di Ca- petla, the ligatures, prolations, and moods, render thefe books extremely difficult to read, or tranfcribc in fcore. However, by dint of meditation and perfeverance, we ar- ranged the parts under each other, of feveral movements by all thefe founders of our church mufic, particularly John Taverner, Dr. Fayrfax, and Dr. Tye ; having fcored an entire mafs by each of them : as they are the moft ancieat and eminent of thefe old mafters, in whofe compofitions the ftyle is grave, and harmony, in general, unexceptionable, if tried by fuch rules as were eftablifhed during tlieir time ; but with refpcft to invention, air, and accent, the two firft are totally deficient. The compofitions, however, of thefe early Englifh maf- ters, have an appearance of national orig-.na'ity, frej from all imitation of the choral produftions of the continent. Few of the arts of canon, ir.verfion, aagin'.ntation, or di- minution, were as yet praftifed by tH. m : Ihort pi.ints of imitation are fomclimes difjoverable, bi.t chi.y Ur-ni more the effefts of chance th.m dcfign : and to char.xte'"ifo the chief of thefe compofers in the order they liav^ been named ; Taverner and Fayrfax have but lictk J fipii ai.J i o m locly in their compofitions ; and it fecms as it they (liould not have T A V have been ranked, as they are by Morley, with thofe of a much higher clafs, at a later period. We can venture to give a charader of Taverner, from an adual fur\'ey of his principal \v«rks which have been pro- ferved, and which we have taken the pains to fcore. Thus author is in general very fond of flow notes, fo that all his pieces which we have fecn, are nd longam, or, at quickeft, alia irtrvc. Long notes in vocal miific, unlefs they are to difplay a very fine voice, have httle meaning, and are wholly dellruAive of poetr)- and accent ; but our old compofers have no fcruples of that kind ; and being as great enemies to Jhort fyllables, as U>Jhort notes, exerciled the lungs of a linger as frequently upon one as the other. As the firil eflays at harmony were made in extemporary difcant, upon a plain-fong, fo in written counterpoint, it was long a favourite and ufcful excrcife, to build the feveral parts of a movement upon fome favourite chant, making it tlic ground-work of the compofition. And this cuftom an- fwered feveral purpofes : it excited ingenuity in the con- tlruAion of the parts ; it regulated and retrained the mo- dulation within the ecclefiaftical limits ; and as the plain- fong had been long ufed in the church, by the priefts and people, it was ftill eafy for the mufical members of the congregation, to join the chorus in finging this fimple and effential part, while the chorifters and choirmen by profeffion, performed the new and more difficult melodies, v.liich had been fuperadded to it by the compofer. The firil reformers, or at leaft their followers, who were perhaps no great mu- ficians, wilhed to bani/h every fpecies of art from the church ; and either retaining fmall portions of ancient chants, or making melodies, in the fame plain and fimple ftyle, for their hymns and pfalms, threw afide all figurative harmony and florid counterpoint ; and fung in notes of equal duration, and generally in mere unifon, thofe tunes which are ftill retained by the Calvinifts, and in moft of the re- formed churches of Chriftendom. At the latter end of the fifteenth, and during the whole of the fixteenth century, as fome chant or tune was the foundation upon which the har- mony of almoll every movement of a mafs or motet was built, the additional parts were the fuperior, medius, counter- tenor, tenor, to which was given the plain-fong in fquare black notes, of equal lengths to femibreves in alia breve time, and bafles. The clofe or final movement of one of thefe mafies is inferted in Burney's General Hiftory of Mu- fic, vol. ii. p. 557. TAVERNES, in Geography, a town ef France, and chief place of a canton, in the department of the Var, and dift.rift of BrignoUes. The place contains 1536, and the canton 4529 inhabitants, on a territory of 280 kiUometres, and 9 communes ; 3 miles N. of Barjols. TAVERNIER, John Baptist, in Biography, 3 dif- tinguifhed traveller, was the fon of a native of Antwerp, and born at Paris in the year 1605. The frequent infpcftion of the maps and charts fold by his father, infpired him with a paffion for travelling ; fo that at the age of twenty-two he had made tours through France, England, the Low Countries, Germany, Switzerland, Poland, Hungary, and Italy. In his bufinefs as a jeweller he was eminently (l- dutifs ; the duty upon houfes and tu'witoius ; the duty arifing from licences to h^ickxicy -coaches and chairs in Loudon, and tl.e parts adjacent ; and the duty upon offices and penfions. See Land-/ijx, &c. &c. The alTefled taxes comprehend thofe on windows, houfes, fervants, carriages, horfes and mules, dogs, horfe-dealers, hair-powder, armorial bearings, and game licences. Fot thofe on windows, fee the following fchedule. Schedule (A.) 48 G. III. c. 55. Number of windows accordin;; 10 which the duties Ihall he charged . Not more than 6 windows or lights (except in fuch houfes which fhall be worth the rent of 5/. by the year, and fhall be charged to the duty mentioned in Schedule (B.), ac- cording to the rent thereof) Not more than 6 windows or lights, if of the value before-mentioned, and charged to the faid duty accordingly - - - . 7 windows or lights - , - Dulles. i' s. d. 066 8 - . Jo. 9 - _ do. 10 . do. 1 1 . do. 12 - do. 13 - - do. 14 - . do. '5 - . do. 16 - . do. 17 . do. 18 . do. J9 - - do. 20 . do. 21 _ do. 22 . do. 23 - . do. 24 - 25 - 26 - ; do. do. do. 27 - - do. 28 - - do. 29 - 30 - 31 - ■ do. do. do. 32 - . do. 33 - 34 - 35 - 36 _ - do. do. do. do. 0 8 0 I 0 0 I 13 0 £ 2 0 2 16 0 3 12 6 4 9 6 5 6 6 6 3 6 7 0 0 7 17 0 8 14 0 9 10 6 10 7 6 II 4 6 12 I 0 12 18 0 13 J5 0 14 1 1 6 15 8 6 16 5 6 17 2 0 17 19 0 18 16 0 19 12 6 20 9 6 21 6 6 22 3 0 23 0 0 n 16 6 24 13 6 TAX. Not more than 37 windo \vs or lights 38 - - do. 39 - - do. 40 to 44 do. 45 - 49 do. 50 - 54 do. 5} - 59 do. 60 - 64 do. 6s - 69 do. 70 - 74 do. 75 - 79 do. 80 - 84 do. 85 - 89 do. 90 - 94 do. 95 - 99, do. 100 - 109 do. IIO - 119 do. 120 - 129 do. 130 - 139 do. 140 - 149 do. 150 - 159 do. 160 - 169 do. 170 - 179 do. 180 and upwards do. And for every fiich dwelling-houfe wliicli (hall contain more than 180 windows or lights, for every window or light exceeding the number of 180 See Windows. £ s. rl. 25 lO 6 26 7 0 27 4 0 28 17 6 3' J 3 6 34 10 0 37 6 0 39 •5 6 42 0 6 44 5 0 46 10 0 48 •5 0 5« 0 0 53 4 6 55 9 6 58 17 0 63 6 6 67 16 6 72 6 0 76 16 0 81 5 6 85 15 6 90 5 0 93 2 6 Schedule (C.) N'^ 2. Duties payable annually for maK- fcrvants retained or employed in the feveral capacities herein mentioned. For every gardener or pcrfon employed to work £ j. J. in any garden under any perfoii chargeable to the duties mentioned in Sch.'dnle (C), N^ i ; and for every gardener employed in any garden wherein the conftanl labour of one perfon (liall not be ncceflary, the fum of - 060 To be paid by each perfon in whofe garden fuch perfon fhall be employed. Exemptions from the Duties as fit forth in Schedule (C. ) N° I. and 2. Any perfon employed by the day or week to work as a day labouier, at tlie ufual rate of wages for day labourers in agriculture, in any garden belonging to a dwelling-houfe, being a farm-houfe, and exempted as fucli from the duties mentioned in Schedule (B.), or in any garden belonging to a dwelling-houfe not chai'geable to the duties mentioned in the faid fchedule, fucli garden not requiring the conftanl labour of one fuch labourer. Schedule (C.) N° 3. Duties payable annually for every male perfon or fervant retained or employed in the feveral capacities herein mentioned. O 3 Schedule (B.) 48 Geo. III. c. 55. Duties on inhabited dwelling-houfes. For every fuch inhabited lioufe with the houfe- hold and other offices, yards, and gardens, therewith occupied and charged, as are or fhall be worth the rent herein -after mentioned by the year, there (hall be charged the yearly fums following ; viz. ^l. and under 20/. rent, by the year 20/. and under 40/. rent, by the year 40/. rent by the year, and upwards The duties payable by 48 Geo. III. c. 55. annually for male fervants are as below. Schedule (C.) N°i. Number of Servants. For Value in the Pound. £ s. d. 6 3 o o o 1 fuch fervant 2 do. 3 4 5 do. do. do. 6 - do. 7 - 8 - do. do. 9 - 10 do. do. ri do. a and upwards - - r For every fuch fervant retained or employed by any male perfons, never having been married, over and above the before -mentioned duties, the further fum of - - - - - Vol. XXXV. Amount of Duty for each Servant. £ J-. d. 2 4 0 2 16 0 3 7 0 3 18 0 4 9 0 4 14 0 4 16 0 5 3 0 5 12 0 6 3 0 7 I 0 1 14 o For every male perfon employed by any mer- chant or trader as a traveller or rider, the duties following ; viz. Where one fuch traveller or rider and no more fhall be fo employed, the fum of - - And where more than one fuch traveller or rider fhall be fo employed, for each the fum of For every male perfon employed by any perfon in trade, or exercifing any profeffion whatever, as a clerk or book-keeper, or office-keeper, except apprentices, where no premivim, or a premium lefs in value than the fum of 20/. has been paid or contrafted for with fuch appren- tice, the duties following ; -viz. Where one fuch clerk, book-keeper, or office- keeper, and no more fhall be fo employed, the fum of And where more than one fuch clerk, book- keeper, or office-keeper fhall be fo employed, for each the fum of .... For every male perfon employed by any perfon in trade as a fhopman, for the purpofe of ex- pofing to fale or felling goods, w-ares, or mer- chandife, in fuch fhop or warehoufe, whether by wholefale or retail ; and every male perfon employed as a warehoufcman, porter, or cellar- man, in fuch fhop or warehoufe, except ap- prentices as aforefaid, the fum of - - The faid duties to be paid by the employer or employers of fuch perfons, and to ex- tend to every body politic or corporate, ■whether aggregate or fole, and to every fociety, fraternity, or partnerlhip, al- though not corporate ; and to every manufadlure or concern (except huf- bandry) whereby the employer ihall feek a profit. £ 10 F.V TAX. l-"or every male fcrvant employed as a waiter £ i. d. (except occafional waiters, over and above the ordinary nimiber ufiially kept) in any taverns, coffee -houfes, inns, ale-lioufes, or other Ucenfed lioufes, or in eating or viftualling houfes, or in hotels or lodging-houfes, being eating or viftualling houfes, the fum of -250 For every male fervant retained by any ftable- keeper to take care of any horfe, mare, or •Tclding, of any otiier perfon or perfons, kept for the purpofc of racing or running for any plate, prize, fum of money, or other thing, or any horfe, mare, or gelding, in training for any of the faid purpofes, whereby fuch ilable- keeper (hall gain a livelihood or profit, the fum of 140 For every male fervant bond fide retained for the purpofes of hufbandry, manufafture, or trade, by which the mailer or millrefs (hall gain a livelihood or profit, and at any time employed in any domeftic employment in any of the capacities in Schedule (C), N°i, and not chargeable to the duties in the faid fchedule, the fum of 060 For every male fervant bond fide retained for the purpofes of hufbandry, or any manufacture or trade, by which the mafter or miftrefs (hall gain a livelihood or profit, and at any time employed in the capacity of a groom, (lable- boy, or helper in the ftables, where the mafter or miftrefs fhall be chargeable for one horfe, and no more, to the duty on horfes kept for the purpofes of riding, or drawing a taxed cart, or to the duty on fuch taxed cart, and not on any other carriage chargeable with duty by this aft, the fum of - - -060 The faid laft -mentioned duties to be paid by the employer, or mafter or miftrefs of fuch perfons or fervants. SchedVile (C.) N° 4. Duties payable on fervants let to hire. For every coachman, groom, poftilion, or helper, i! s. d. kept for the purpofe of being let to hire for any period of time lefs than one year, and in fuch manner that the ftamp-office duty pay- able by law on horfes let to hire fhall not be payable on every fuch letting by any poft- mafter, inn-keeper, or other perfon, duly licenfed to let poft-horfes by the commilTioners for managing the duties on ftamped vellam, parchment, and paper, or by any coach- maker or maker of fuch carriages, or other perfon, the annual fum of- - - -240 The faid duty to be paid by the perfon or perfons letting the fame to hire. Thefe feveral duties are fubjeft to certain exemptions. The provifions of 43 Geo. III. c. 161. relating to the affeffments of fervants, are as follow. Perfons hable to thefe duties are to return lifts of their fervants, and are chargeable accordingly from the year commencing from the days ftated in their returns ; and they are fubjeft to the powers of furcharge. Perfons beginning or ceafing to keep fer- vants are to give notice in writing to the aflelTor of the diftrift in which they refide. Schedule (D.) N" i. Duties pivyable on all carriages of any of the defcriptions mentioned herein. Amount of Nu;nbei- of Carriages. Duty lor each Carriage. For carriages with four wheels : £' s. d. For 1 fuch carriage, the annual (um of -1150 2 - do. 1270 3 - do. - - - - -13100 4 - do. - - - - -1400 5 - do. - - - - -14120 6- do. - - - - -'530 7 - do. - - - - - 15 14 o 8 - do. - - - - -1650 9 - do. and upwards - - - 16 l6 o And for every additional bvdy fucceffively ufed on the fame carriage or number of v\heels, the further fum of- - - - -5120 Schedule (D.) N° 2. For carriages with lefs than four wheels : For every fuch carriage ( except taxed carts, con- ftrufted, kept, and ufed, under the regulations of this aft) drawn by one horfe, mare, or geld- ing, and no more - - - - -5180 And for every fuch carriage, drawn by two or more horfes, mares, or geldings - - -850 And for every additional body of the defcription herein-after mentioned, fuccefllvely ufed on the fame carriage or number of wheels, the further fum of - - - - -2160 Schedule (D.) N°3. ' For carriages hired for any period of time lefs than one year, or kept to be let to hire, or to carry paflengers : For every fuch carriage kept for the purpofe of being let to hire, with horfes to be ufed therewith, for any period of time not exceed- ing twenty-eight days, fo that the ftamp- office duty, payable by law on horfes let to hire (hall be duly paid and fatisfied on every fuch letting by any poft-mafter, inn- keeper, or other perfon duly licenfed to let poft-horfes, by the commiffioners for manag- ing the duties on ftamped vellum, parchment, and paper, and whereon the name or names and place of abode of the perfon or perfons fo licenfed (hall be marked or painted, accord- ing to the direftlons of the aft in that cafe made and provided ; if fuch carriage fhall have four wheels, the fum of - - - ■ 9 9 O And if fuch carriage (hall have lefs than four wheels, the refpeftive fums men- tioned in Schedule (D.) N° 2, accord- ing to the nimiber of horfes ufed there- with, as therein mentioned. And for every coach, diligence, caravan, or chaife with four wheels or more, or other carriage with four whee\s or more, by what- ever name the fame (hall be called or known, which (liall be kept and employed as a public ftage -coach or carriage for the purpofe of con- veying paffengers for hire to and from dif- ferent places, and which fhall be duly entered as fuch with the faid commilTioners of ftamp duties, the like fum of - - - -99° AU TAX. All -vvhich lail-mentii)ne(l diilios (hall re- JU s. J. fpeftively bo paid by tlic pcrfon or per- foiis keeping the fame, for the purpofes aforefaid. For every carriage kept for the purpofe of being let to hire for any period of time lefs than one year, and in fueh manner that the faid ilamp-office duty (hall not by law be payable on fucli letting by any perfon fo licenfed as aforefaid, or by any coach-maker or maker of fuch carriages, or otlier perion, if fuch carriage (hall have four wheels, the annual fum of - - - - -1150 The laid laft-mentioned duty to be paid by tlic perfon or perfons keeping the fame for the purpofes aforefaid. , Provided, if a due return thereof (hall not \)C made by the hirer or hirers according to the diredlions of the afts herein mentioned, the progrefTive duty, as fet forth in Schedule (D.) N^ i, (hall be chargeable in refpeft of every fuch carriage on the perfon or perfons hiring the fame, and making fuch default as aforefaid, fubjeft to the provifions contained in the faid acts concerning the fame. And if fuch carriage (hall have lefs than four wheels, the refpeftive furas mentioned in Schedule (D.) N° 2, accord- ing to the number of horfes to be ufed therewith, to be paid by the perfon or perfons keeping the fame for the purpofe aforefaid, fubjeft to the proviiions herein-after contained concerning the fame. See Coach and Taxed Cart. By 50 Geo. III. c. 104. certain new duties are impofed. A Schedule of the Duties payglile on Carriages caUed Taxed Carts. N° I. For every carriage called a taxed cart, built and € s. d. conftrufted according to the regulations of the faid aft, in every refpeft the original price of which (hall not have exceeded, or the value whereof (hall not at any time exceed the fum of 15/. rterling, and which (hall not at any time be ufed with a covered or fluffed feat, or with a covered foot-board or apron thereto fixed or not fixed, there (hall be charged the annual fum of t - - I 6 6 N°II. For every fuch carriage called a taxed cart, built and conllrufted with a fpring or fprings of any materials whatever, (except of iron, fteel, or any other metallic fubilance, or any compofition of iron, (feel, or other metallic fubftance, either wholly or in part,) the ori- ginal price of which carriage (hall not have exceeded, or the value whereof fliall not at any time exceed the fum of 20/. fterliiig, or which (hall be ufed with a ftu{fcd feat or cufhion, or with a covered foot-board or apron thereto fixed or not fixed, there (hall be charged the annual fum of 2100 A Schedule of the Duties payable on Carriages with lefs than Four Wheels. N°III. For every carriage with lefs than four wheels chargeable by the faid adl of the forty -eighth of his prefent majefty's reign with the duty of Taxes were dillinguifhed into free, which were thole due, in the four cafes, by freemen, or thofe who held free lands ; and fervih and b.ife', which were thofe due from perfons ot bafe condition. ,- 7 rr. They were alfo diftinguidied into real and perfonal. 1 he perfonal were impofed on the head of the fervant or man in mainmort, and fo followed him wherever he went. TAXA, in Geography, one of the fmall Weftern illands, near the fouth-eaft coaft of Hay. N. lat. 55" 43'. W. long. 6° 3'. TAXAMALCA, a town of Mexico ; 60 miles S. of Mexico. TAXAMARCA, a town of Mexico, in the province of Mechoacan ; 40 miles E. of Mechoacan. TAXANTHEMA, in Botany, fo named by Necker, from TK?!,-, a row, and av9n,x«, hiflnrefcence^ becaufe fome of the plants on which this fuppofed genus is founded differ from other fpecies of Statice, in having their flowers difpofed in a regular feries, or row, and not in a round head ; wit- nefs S. Limonium and its allies. Thefe fpecies indeed con- ftitute Tournefort's genus of Limonium, but he affociates with them others with difperfed flowers. (See Statice and Limonium.) Mr. Brown, Prodr. Nov. Holl. v. i. 426, adopts Necker's genus and name, citing Tournefort's Limonium as a fynonym. The latter name was probably judged too near Llmonia to be retained. We prefume to think the genus of Statice is in itfelf fo natural, and fo well diftinguiihed from every other, that if a praftical example were defired, to warn us againft founding generic dillinftions upon inflorefcence alone, no better could be felefted. See Cyme and Genus. TAXERS, two officers yearly chofen in Cambridge, to fee the true gauge of all weights and meafures obferved. The name took beginning from taxing and rating the rents of houfes, which was anciently the duty of their office. TAX-GUTIUM, in Ancient Geography, a town of Rh^tia, towards the fource of the Rhine, near Brigantium. Ptol. TAXIANA, an ifland fituated in the Perfian gulf, on the coaft of Sufiana, weft of the ille of Tabiana. Ptol. TAXILA, a large town of India, on this iide of the Ganges. Ptol. and Strabo. TAXIMIRA, a town of Phoenicia. Strabo. TAXIPA, in Geography, a town of Mexico, in the pro- vince of Guafteca ; 30 miles N.N.W. of Panuco. TAXIS, Ta|.;, in the Ancient Architefliire, fignifies the fame with ordonnance in the new, and is dcfcribed by Vitru- vius to be that which gives every part of a building its juft dimenf^ons with regard to its ufe. Taxis, from To-s-^i', lo put in order, in Surgery, the opera- tion of reducing a hernia with the hand. See a particular account of it in the article Hernia. TAXITLAN, in Geography, a town of Mexico, in the province of Guafteca ; 38 miles S. of St. Yago de los Valles. TAXUS, in Botany, the ancient Latin name of the J. ^ A. ^^ X^I 1^ , 111 JJUIiHiy, b(li~ (1IIV.1^,11V .LJAI.I11 11UI11\. ^'X \.li^ ew-tree, ufed by Pliny. The word is fuppofed by fome • be derived from to|o-., a boiu, arroiu, or dart, becauie T A X mifTile weapons were poifoned with its berries. We are con- fident that this precife explanation is erroneous, becaufe, whatever may be the noxious quahties of any other part of the plant, the berries are fimply mucilaginous and faccha- rine, eatable vvitli impunity, as we have often experienced. The ancient ufe of this wood for bows, perhaps alfo for arrows or darts, might more truly account for the above etymology, did not Diofcorides exprefsly tell us Txfo; was Latin Linn. Gen. 532. Schreb. 706. Willd. Sp. PI. V. 4. 856. Mart. Mill. Dia. v. 4. Sm. Fl. Brit. 1086. Prodr. Fl. Grxc. Sibth. v. 2. 265. Ait. Hort. Kew. V. 5. 415. Purfh 647. Juff. 412. Lamarck lUuftr. t. 829. Gsertn. t. 91. — Clafs and order, Dloecia Mona- delphia. Nat. Ord. Cnnifert, Linn. JufT. Gen. Ch. Male, Gal. none, except the fcales of the bud, refembling a perianth of four leaves. Cor. none. Stam. Filaments numerous, united below into a column, longer than the bud ; anthers depreffed, blunt, with eight notches, at the edge, fphtting all round at the bafe, and after fliedding tlieir pollen becoming flat and peltate, re- markable for their eight marginal fegments. Female, Cal. inferior, of one leaf, clofe, undivided, en- tire. Cor. none. Pijl. Germen fuperior, ovate, acute ; ftyle none ; ftigma obtufe. PeKtc none, except a fpu- rious incomplete berry, formed of the calyx elongated into a globofe juicy coloured Iheath, open at the top, at lengtli (hrivelling and drying away. Seed one, ovate- oblong, projefting with its fummit beyond the berry. Eff. Ch. Male, Calyx none. Corolla none. Stamens numerous. Anthers peltate, with eight fegments. Female, Calyx cup-fhaped, entire. Style aone. Seed one, partly enveloped in the pulpy calyx. Obf. LinnKus properly mentions that the berry of this genus cannot, ftriftly fpeaking, be denominated a pericarp. " It is a remarkable fpecies of bern-, like which nothing elfe is to be feen, except perhaps in Gaulthcria.'" If the analogy here cited be juft, the part in queftion is a real calyx, not more extraordinary in its change than that of Blitum, or of Morus, and we have always ventured to term it fuch, truiling to the analogies of Juniperus and Ephedra for our iupport. I. T. baccata. Common Yew. Linn. Sp. PI. 1472. Willd. n. I. Fl. Brit. n. i. Engl. Bot. t. 746. (Taxus ; Ger, Em. 1370. Matth. Valgr. v. 2. 444. Camer. Epit. 84P. ) — Leaves linear, two-ranked, crowded, nearly flat. Male flowero globofe. — Native of mountainous woods, par- ticularly in the clefts of high calcareous rocks, in various parts of Europe, from Norway to Greece, flowering in March or April. Diofcorides indeed, who calls this tree o-|UiAaf, fpeaks of it as an exotic, the la^oc of the Romans ; but Mr. Hawkins noticed it wild on the rocks of mounc CyUenein Laconia. Thunberg fays it is common ir. Jripan. The trunk is ftraight, of flow gi-owth, with a fmooth deci- duous bark, and very hard, tough, cloie-grained wood. Branches fpreading horizontall)' in two direftions. Leanies numerous, fcattered, crowded, fpreading in two rows, nearly fcfTile, linear, entire, flightly revolute, Qbtufe with a fmall point, fmooth, of a dark fhining green, permanent, about an inch long. Floivers axillai-y, folitary, nearly feflile, en- veloped with imbricated bradeas ; the male ones numerous, fometimes two or three together, cream-coloured, half the fize of a pea, globofe, abounding with pollen ; females drooping, their green entire calyx juft vifible beyond the bradeas. This afterwards affumes the appearance ot a bright fcarlct berry, the fize of a currant, open at the top, where the feed appears. The leaves are very poifonous, and if ac- cidentally eaten by domeftic cattle, prove fatal. The ancienti TAXUS. ancients report that it is dangerous to fleep under this tree. It was JFormerly much planted in church-yards ; and many Yews, perhaps " the tenants of a thoufand years," Hill re- main in the northern and WcKh village cemeteries. This was the favourite tree for clipping into any fantaftic fliape, on which art our 4to. The firfl of thefe letters contains an account and ex- amination of the various opinions among Chriflians, concern- ing the nature and perfon of Chrift. In the fecond, third, and fourth letters, it is propofed to fliew from fcripture, that the Logos was the angel of the covenant, and to prove the fame from the moft approved commentators on fcripture, both ancient and modern, both Jewifh and Cliriflian ; and to demonflrate that Jefus was the MefTiah. The fifth, fixth, and feventh letters contain preparatory principles to the Chriflian fcheme of redemption ; giving the fcheme of Cliriflianity itfelf, and fhewing it to be one, plain, regular, and confiflent fyflem of divine economy, from the beginning of the world to the end ; and containing proofs, illuflrations, anfwers to objeftions, and an examination of Mr. Hume's notion of miracles. — " Thoughts on the Nature of the Grand Apoftacy, with Refleftions and Obfervations on the Fif- teenth Chapter of Mr. Gibbon's Hiflory of the Decline and Fall of the Roman Empire ; to which are added three difTertations : I. On the ParouCa of Chrifl ; 2. On the Mil- lennium ; 3. On the late Rev. Mr. Richard Wood, on Pro- phecy," 1781. — " Farther Thoughts on the Nature of the Grand Apoflacy of the Clu"iflian Churches, foretold by the Apoftles ; witli Obfervations on the Laws againft Herefy, the Subfcription to Articles of Human Compofition, and other Subjefts of the utmofl Importance to the Religion of Pro- teftants, and to Chriflianity in general," 1783. — " Confider- ations on Ancient and Modern Creeds compared ; the Supre- macy of the Father ; the perfon;d Exiflence of the Holy Spi- rit; the Pre-exiflenceof Chrifl and hisDivinity,&c." publifhed after the author's death by his fon, the Rev. Henry Taylor, reftor of Spridlington, Lincolnlhire, 1788. Mr. Taylor, who was of a fprightly, cheerful difpofition, occafionally amufed himfelf in writing verfes ; fome of which, particularly his " Paradife Regained," are publifhed in Dodfley's Collection. On Mr. Taylor's principles and charafter it is needlefs to enlarge. Hisconduft in private and focial life correfpondcd to his clerical profeflion : to the fentiments of bifhop Hoadley, in church and flate, hcw.is invariably attached ; he joined the petitioning r c H T C H petitioning clergy in their application for an enlargement of the terms of conformity ; and he avowed hinifclf on all oc- cafions, without difguife, the friend and advocate of civil and religious liberty. In his theological opinions, he confi- Uered iiimftlf as coinciding more nearly with Apollinaris, than with any other. ot RulUa, which rifes near Suchotzkoi, in the government TAY-MING, in Geography, a city of China, of the fiHl of Novgorod, and runs into the Mologa, 16 milc« N. of rank, in Pe-tche-li ; 232 miles S.S.W. of Peking. N. lat. Uftiuzna. E. long. 114=49'. TCHAHAN Hotun, a town of Chincfe Tartary TA YNG, a town of Corea ; 25 miles S.E. of Haimen. 260 miles N. of Peking. N lat ai° c8' E loii TAYWAN, or Tai-ouan, the capital of Formofa; 117° 29'. ^ • '\i i ■ ■ TCHAGANSKOI, a fortrefs of Rnma, 011 the Ural ; i6mile6 S. of Undflc. TCHAGODO, a town of Ruflia, in the government of Novgorod, on the lake Voz ; 240 miles N.E. of Nov- gorod. N. lat. 60° 30'. E. long. 38° 44'._Alfo, a river )tzkoi, in Mologa, 36° 20' ang. which fee. TAZ, a river of Ruflia, which rifcs from two lakes, Ku and Din, and runs into the Tazovlkaia gulf, N. lat. 67^35'. E. long 80° 14'. TAZABUCO, a town of Peru ; 46 miles E.N.E. of La Plata. TAZATA, in Anc'iaU Geography, an ifland of the Cafpian fea, near the coaft of Hyrcania. Pliny. It is called Talca by Ptolemy, and Tidga by Mela. TAZEE, in Geography, 7i town of Candahar ; 70 miles E. of Candahar. TAZEWELL, a poft-town of Tenneflee ; 517 miles W.S.W. of Wafhington. TAZINA, in Ancient Geography, *a town of Afia, in Media. TAZLA, or Salato, in Geography, a lake of Afiatic Turkey, 36 miles long, and 2 broad ; 30 miles N. of Cogni. Tazla, a town of Afiatic Turkey^ in Caramania ; 28 miles N. of Cogni. TAZOVSKAIA, a gidf or bay in the Obn2 miles EL of Enifei/k. Tchahan Hanwr, a town of Chinefe Tartary ; 38^ miles S.W. of Coucou. Ten AH AN Soubarhan Hotun, a town of Chinefe Tartary ; 163 miles N.N.E. of Peking. N. lat. 41° 38'. E. lonff. 1 18° 44'. ^ TCHAHASGU Hotuk, a town of Chincfe Tartary ; 683 miles N.N.E. of Peking. N. lat. 49° 74'. E. W. 127° 42'. t:' Jt fi TCHAHI, a town of Perfia, in the province of Cho- rafan, or Khoraflan ; 258 miles N. of Herat. TCHAIA, a river of Ruflia, which runs into the Lena, near Tchamflca, in the government of Irkutfk. N. lat. 58° 5'. E. long. 109° 34'. TCJiAICAN, a town of Corea; 28 miles W. of Outchuen. TCHAI-YAM, a river of China, which joins the Lo, 15 miles W.S.W. of Pao-king. TCHAKAN-TOTOHO Kiamen, a poft of Chinefe Tartary, in the country of the Monguls ; 18 miles S.E. of Kara-Hotun. TCHAKET, a town of Afiatic Turkey, in Aladulia ; 15 miles N. of Adana. TCHAKTELA, a town of Afiatic Turkey, in Cara- mania ; 27 miles N. of Akfhehr. TCHAL, a town of Kurdiftan, or Curdiftan ; 28 miles E. of Amadielu TCHALBISCHEVO, a town of Ruflia, in the go- vernment of Tobolfk ; 20 miles S. of Enifeiflc. TCHALMOZA, a town of Ruflia, in the government of Oloiietz, on the north-calb coaft of lake Onezfkoe ; 32 miles S.E. of Povenetz. TCHAM, a town of Corea ; 420 miles E. of Peking. TCHAMDSOU-TIGAC, a lake of Thibet, about 36 miles in circumference. N. lat. 31° 30'. E. long. 81° 26'. TCHAMNAGOM-DOU, a lake of Thibet, about 36 miles in circumference. N. lat. 30° 50'. E. long. 9f 54'- TCHAMSKA, a town of Ruflia, in the government of Irkutfc ; 64 miles E.N.E. of Kirenlk. TCHAM-TCHIM Hotun, a town of Corea; 415 miles E. of Peking. N, lat. 40° 9'. E. long. 1 34" 46'. TCHAM-TIEN, a town of Chinefe Tartary ; 43 miles N.W, of Siao-ku-leou. TCHAMTOU, a town of Thibet ; 54 miles S.W. of Contchondfong. TCHANG, a lake of China, about 20 miles in circum- ference ; 40 miles N.E. of Tcin-tcheou. TCHANG-CHAN, or Chan-sax, a fmall ifland in the Chinefe fea, and inotl foutherly of thofe called Mi-a-tou ; 18 miles N.W. of Tcng-tcheou. TCHANG-FONG, a town of Corea ; 63 miles E.S.E. of King-ki-tao. TCHANG-HOA, a town of China, of the third rank, in the ifle of Hainan ; 42 miles S.W. of Tchen-tchcou. TCHANG-ING, a town of Corea ; 40 miles S. of Kang. TCHANG- T C H TCHANG-KIA-KEOU, a gate on the great wall, which feparatcs Cl>iiia from Tartary, in the northern part of Pc-tche-li, the principal palTage by which the Tartars enter China ; 90 miles N.N.W. of Peking. TCHANG-PING, a town of Corea; 15 miles E. of Koang-tcheou Alfo, a city of China, of the fecond rank, in Pe-tche-li ; 20 miles N.N.W. of Peking. N. lat. 40° 14'. E. long. 1 15° 37'- TCHANG-SING, a town of Corea ; 35 miles S. of Koang-tcheou. TCHANG-SONG, a town of Corea ; 33 miles N.W. of Kang-tcheou. TCHANG-TCHA, a city of China, of the firft rank, in Hou-quang, on the Heng river. The inhabitants of this city have given occafion to a great fcftival, which is celebrated in the fifth month throughout the empire. The mandarin who governed this city, and was much efteemcd and beloved by the people for his probity and virtue, hap- pening to be drowned in the river, they indituted a feftival to his honour, which is celebrated by fports, and feafts, and fights upon the waters, as if they intended to fearch for the mandarin, the objcft of their love and grief. This feftival, which was at firft peculiar to this city, came afterwards to be obferved throughout the empire ; 742 miles S. of Peking. N. lat. 28° 11'. E. long. II 2° 25'. TCHANG-TCHEOU, a city of China, of the firft rank, in Fo-kien; 950 miles S. of Peking. N. lat. 24° 32'. E. long. 117° 34' Alfo, a city of China, of the firft rank, in Kiang-nan ; 525 miles S.S.E. of Peking. N. lat. 31° 50'. E. long. 1 19° 29'. TCHANG-TE, a city of China, of the firft rank, in Hou-quang ; 717 miles S.S.W. of Peking. N. lat. 29° 2'. E. long. 1 1 1° 2'. TCHANG-YUEN, a town of Corea ; 60 mUes W.S.W. of Ho-ang-tcheou. — Alfo, a town of Corea ; 30 miles S.E. of Kang-tcheou. TCHANI, a lake of Rufiia, in the government of Koli- van, upwards of 200 miles in circumference ; 100 miles W.N.W. of Kolivan. TCHANKOUR, a town of Thibet ; 105 miles S.E. of Sourman. TCHAN-TE, a city of China, of the firft rank, in Ho-nan. This is one of the moft northern cities of the pro- vince. Two things are here remarkable : the firft is a fi(h refembling a crocodile, the fat of which is of fuch a fingular nature, that when once kindled it cannot be extinguiftied ; the fecondjs a mountain in the neighbourhood, fo iteep and inacceflible, that in time of war, it affords a place of refuge to the inhabitants, and a fafe afylum from the infults and Tiolence of the foldiery. Tchan-te contains in its diftrift one city of the fecond clafs, and fix of the third ; 255 miles S.S.W. of Peking. N. lat. 36° 6'. E. long. 1 14°. TCHAO-KING, a city of China, of the firft rank, in Quang-tong, on the river Si ; 1 062 miles S.S.W. of Peking. N. lat. 23° 3'. E. long. 111^44'. TCHAO-NAIMAN-SOUMI-HOTUN, a town of Chinefe Tartary ; 198 miles N. of Peking. N. lat. 42° 28'. E. long. 1 1 5° 44'. TCHAO-TCHEOU, a city of China, of the firft rank, in Quang-tong, on the Pe-kiang ; 1007 miles S. of Peking, N. lat. 23° 37'. E. long. 1 16° 21'. TCHAOUTCHE-AGHISI, a town of Afiatic Tur- key, in Natolia, on the Black fea ; 12 miles N.W. of Erekli. TCHAPIE-DSAKE-TOMPSOU, a lake of Thibet, jibout 54 miles in circumference. N. lat. 32° 12'. E. long. •4° 3V- T C H TCHARKAZ. See Zakciias. TCHARONDA, a town of Rufiia, in the government of Novgorod, on the Sula ; 188 miles E.N.E. of Nov- gorod. N. lat. 59° 40'. E. long. 37° 34'. TCHASl RCONG, a town of Thibet, near the Ganges; 24 miles E. of Latac. TCHASTIJA, an ifland of Ruflia, in the government of Irkutflc, on the Lena ; 112 miles N.E. of Kirendv. TCHAT, a mountain of Thibet, on the frontiers of Yarkan. N. lat. 33° 10'. E. long. 78° 44'. TCHATELI, a town of Chinefe Tartary, in the country of Hami ; 38 miles N.W. of Hami-Hotun. TCHAUNSKAIA, a gulf on the northern coaft of Rufiia, in the Frozen fea. N. lat. 71° to 72°. E. long. 166° to 169°. TCHAUSI, a town of Ruflia, in the government of Mogilev, on the Soz ; 40 miles S.E. of Mogilev. N. lat. 53° 36'. E. long. 31° 14'. TCHAZMIUNSKOI, a cape on the eaft coaft of Kamtfchatka; 52 miles S. of Verchnei Kamtfchatfl'riter of the Nor- folk Agricultural Report met with on entering the diflrift of Fleg, in coming from Yarmouth. It confills in carting turnips on to wheat in February and March ; they call it pull and thronv on wheat, eating them on that crop by fhcep and bullocks, if Iheep are kept ; if not, by bullocks alone. The outfield grafs-land in fome of the fheep diftrifts in the northern parts of the ifland, which are inclofed in a tem- porary manner, and intended to be broken up for tillage, ai-e fometimes teathed, by confining black cattle and (heep upon them in fomething of the fold manner. TEATINOS, in Geography, a fmall ifland in the Pacific ocean, between the ifland of Chiloe and the coaft of Chili. S. lat. 43° 35'. TEATS, Sore, in Neat Cattle, an affeftion m thofe of the cow-kind, to which fome are much more fubjeft than others ; efpeciiiUy fuch as have newly or lately calved. When the teats of thefe animals are affefted during the fummer months, they often become ulcerated, and by the tcazing of the flies, the cattle ;u-e rendered difficult to be milked : they alfo become a very great nuifance at the periods of milking, as the difcharges from them are apt, without much attention, to pafs between the fingers of the operator into the milk -pail, and fpoil the milk. The affeftion is caufed by inflammation, irritation, and too much diftention of the parts by the milk. In order to the removal of it, the milk fliould be firfl fre- quently drawn, and the parts well waflied with foft foap and warm water ; after which, a fubfl:ance compofed of elder ointment and wax melted together, to which is then added a little alum and fugar of lead, in fine powder, may be ufed to the parts after milking at night and in the morning ; or a weak folution of white vitriol and a little fugar of lead, in foft water, may be made ufe of in the fame way, in fome cafes, with more advantage. The addition of a httle affa- foetida, and fuch hke lubftances, in powder, is, it is faid, be- neficial in the fummer feafon in driving away the flies. TEC Great care is to be taken to keep tlic teats as clean an poffible during the time of cure. TEBALA, in Geography, a town of Arabia, in the pro- vince of Hedsjas ; 128 miles S.S.E. of Mecca. TEBALDEO, Antonio, in Biography, an Italian poet, was born at Ferrara in 1463. Although brought up to the medical profeffion, he cliiefly devoted himfih" to poetry, and it was his cullom to accompany his verfcs with his lute. Of thefe, which were much admired, a coUeftion was pubhihed by his coufin Jacopo, in 1499, and often reprinted. In Latm verfe he fuccecded better than in tiiofe of his native language ; and it is faid, that pope Leo X. gave him 500 gold ducats for a finglc epigram. After the death of Leo, whofe favour lie enjoyed, he was reduced to the neceflity of bfgging 30 florins of cardinal Bembo. He died at Rome in the year 1537. Specimens of his compofitions in both lan- guages are given in Mr. Rofcoe's Life of Leo X. Gen. Biog. TEBECRIT, in Geography, a town of Algiers, near tlie Mediterranean ; 2 miles from Ned Roma. TEBELBELT, a town of Africa, in the country of Tafilet ; 100 miles S. of Sugulmefla. TEBENDA, in Ancient Geography, a town of Afia, in the interior of Pontus Galaticus. Ptolemy. T'E.YiJ.'^T A.,\nGeography,A town of Africa, in the kin^ dom of Tunis, on the borders of Algiers, wlierc are found feveral beautiful ruins. It was anciently very fl;rong ; but, in the year 1057, was laid wade by MuUy Mahomet. Te- befta is well fupplied with water, and the environs abound in almonds and nuts ; 130 miles S.S.W. of Tunis. TEBET, or Thevet, the fourth month of the civil year of the Hebrews, and the tenth of their ecclcfiaflical year. It anfwered to part of our December and January, and lias but twenty-nine days. The fecond day of this month is tiie lail of the oftave of the dedication of the temple, after it .was purified by Judas Maccabeus. See i Mace. iv. 59. John, X. 22. The tenth day of this month is obferved by the Jews as a faft, in memory of the fiege of Jerufalem by Nebuchadnez- zar, in the ninth year of Zedekiah. TEBIQUARl, in Geography, a river of South America, which rifes in S. lat. 27'', and joins the Iquay, to form the Rio Grande, in S. lat. 30" 55' Alfo, a river of South America, which runs into the Paraguay, 8 miles below Affumption. TEBOOA. See Hood's IJland. TEBSEN, a town of Egypt, on the Nile ; 16 miles N. of Cairo. TEBUC. See Tahuk. TEBUHASAN, a town of Africa; 15 miles S.E. of Sugulmeffa. TEC A LA, a town of European Turkey, in Theffaly ; 30 miles W. of Lariffa. TECALETH, a town of Morocco ; 1 2 1 miles W.N.W. of Morocco. TECALIA, in Ancient Geography, a town in the northern part of Germany. Ptolemy. TECEUT, or Teciieit, in Geography, a town of Africa, in the country of Sus, fituated in a fertile foil, abounding with grain, dates, figs, grapts, and fugar-canes. Here is a manufafture of Morocco It-ather ; 150 miles S.W. of Morocco. TECH, a river of France, which rifes in the Pyrenees, and runs into the Mediterranean, near Elne. TECHE, a river of Louifiana, which connefts with the Vermillion ; and thefe arc the principal rivers of the Atta- kapas. Their general courfcs are nearly the fame to the lake TEC lake Taffe ; their channels are deep, and they are conncfted by ftrcams from the lake TafTe. The Tcche is much iarger and longer than the other, being upwards of 200 miles in length. The Taffe is a beautiful lake of clear water, about 10 miles in circumference. The principal fettlements of the Attakapas are on each fide of the Teche, moftly weftern, and on the Vermillion. Befides the culture of cotton, maize, &c. they have the advantage of extenfive natural meadows to fupport their herds, which, on account of the natural mild- nefs of the climate, are kept without much trouble. The inhabitants of the Attakapas are generally wealthy, and live as luxuriantly as the planters of the MilTifippi. Upon the whole, this part of Louifiana feems deftincd to become one of its richell dittridls. TECHIA, a town of the Arabian Irac ; 160 miles N. of Bagdad. TECHNICAL, Technicus, formed of t!x«ixo;, artifaal, of Tsx", "'■/, fome'thing that relates to art. In this fenfe we fay, technical -words, technical verfes, &c. And in this fenfe Dr. Harris entitles his diftionary of arts and fciences, Lexicon Technicum. Technical is more particularly applied to a kind of verfes, in which are contained the rules or precepts of any art, thus digefted to help the memory to retain them. See Arti- fcial Memory. Technical verfes are ufed in chronology, &c. Such, e. gr. are thofe expreffing the order and meaiure of the calends, nones, &c. thofe exprefling the feafons, and thofe expreffing the order, &c. of the figns. F. Labbe has compofed a fet of teshnical Latin verfes, in- cluding all the epochas in chronology ; and F. Buffier, after his example, has put both chronology and hiftory into French verfe, and even geography alio. Technical verfes are commonly compofed in Latin ; they are generally wretched ones, and often barbarous ; but utility is all that is aimed at in them : to give fome idea of which we will here add a few inftances. The cafuifts include all the circumftances which make us partakers with another in a theft, or other crime, in thefe two technical verfes. " Juffio, confilium, confenfus, palpo, recurfus, Participans, mutus, non obftans, non manifeftans." The firft of F. Buffier's technical verfes of the hiftory of France, are thefe : " Ses lois en quatre cents Pharamond introduit, Clodion Chevelu, qu' Aetins vanquit. Merovee ; avec lui combatit Attila ; Childeric fut chafle, mais on le repella." TEcnKiCAL Words, are what we otherwife call terms of art, TECHUKS, in Geography, the moft remote people of Afiatic Ruffia, who fcarcely exceed 1000 families, are ge- nerally found in fmall camps, pitched by the fides of rivers. Their rude tents are fquare, confifting of four poles, fupport- ing {l del's grand Te Deum for the peace of Utrecht was firft per- formed. It was natural to imagine that it was firft heard at St. Paul's, and that queen Anne went thither in ftate on the occafiOn, which fir John Hawkins pofitively aft'crts, telHng us that, " in 1713, the treaty of peace at Utrecht being finiftied, a public thankfgiving was ordered for the occalion, and Mr. Handel received from the queen a command to compofe a Te Deum and Jubilate, which were performed at St. Paul's cathedral, her majefty herfelf attending the fer- vice." Hift. Muf. vol. v. p. 269. But though in a paragraph of the Poft Boy, July 2, 1713, it is announced that " her majefty goes the 7th to St. Paul's, being the day appointed for the thankfgiving, accompanied by the houfes of the lords and commons;" yet in the fame newfpaper, from Saturday July 4, to Tuefday July 7, 1713, the public was informed that " her majefty does not go to St. Paul's July 7, as ftie defigned, but comes to St. James's (from Windfor) to return thanks to God for the bleflings of peace." If Handel's elaborate compofition had been executed at St. Paul's, a ftyle of mufic fo new, forcible, and maflerly, muft have had a great effeft on an Englifti congregation, who had never heard ecclefiaftical mufic fo accompanied. Pur- cell's voice parts, always pleafing, well accented, and ex- preflive, had little affiftance from an inftrumental band. In- ftrumental mufic, except organ playing, was but little culti- vated in our country during his time. But Handel, befides his experience in Germany, had heard operas and maffes per- formed by great bands in Italy, with fuch precifion and efi^efts, as were unknown in our country till he came hither to teach us. Handel's Te Deum for the battle of Dettingen, 1743, and Graun's for the king of Pruffia's viftory at Colin, in 1757, are the moft celebrated compofitions to that facred hymn of the laft century, and the moft likely to furvive the prefent. TEDIASTUM, in Anc'unt Geography, a town placed by Ptolemy in the interior of Liburnia, near Aruciae.' TEDJEN, or TeDVEK, in Geography. See Tedzen. TEDIF, a town of Syria, in the pachalic of Aleppo. Here is a Jewilh fynagogue ; and the inhabitants have a tra- dition that one of the minor prophets refided here. On a hill near this town are fome fepulchres and aquedufts cut in the rock ; 2 1 miles E. of Aleppo. TEDINGHAUSEN, a town of the duchy of Bre- men ; 9 miles S. of Otterlberg. TEDIUM, in Ancient Geography, a town of Arabia De- ferta, near Mefopotamia. Ptol. TEDLA, or Tedila, in Geography, a province of the empire of Morocco, in the kingdom of Fez, which ex- tends along the eaftern fide of Mount Atlas, and has to the weft the province of Shavoya, and to the S. Morocco. This is a rich province, abounding in fheep, whofe wool is fo fine, that no filk is fofter : it is ufed in the manufacture of caps worn by the opulent, and is fold at Fez at a very high price : its exportation being prohibited, it is confumed by the in- habitants. The province contains 450,000 inhabitants. TEDNEST, or Tedoest, a town of Africa, in the empire of Morocco. This town was deftroyed by the Por- tuguefe in the year 15 14, and in part rebuilt by the Jews ; 40 mOes N.E. of Mogador. TEDONG. See Tirun. TEDSI, a town of Africa, in the coimtry of Sus, fituated to the eaft of Tarudant ; 90 rnjles S.W. of Mo- rocco. TEDZEN, TED T E D TEDZEN, a town of Perfia, in Klioraflfan, on a river of the faille name ; 32 miles E. of Mefghid. — Alfo, a river of Perfia, in the province of Klioraflfan, fuppofeJ to be the aiTcient Ochus, and next in fize to the Oxus. It has its fource near Saraks ; and after receiving many ilreams, and in tlie number McHicd river, falls into the Cafpiau fea, in N. lat. 38° 41'. ■ TEE, in the Manege. See Breast-/'/^/,?. T^t.-Square. See Square. TEEBAKAN, in Geography, a fmall ifland in the Eaft Indian fea, near the N. coall of Borneo. N. lat. 7^52'. E. long. 117° 39. , . TEECHA, a town (rf Bengal; 45 miles E. of Cal- cutta. TEEDIA, in Botany, fo named by Perfoon, we know not with what meaning. — " Perf. Syn. .v. 2. 166." Brown in Ait. Hort. Kew. v. 4. 47. See Capkakia, fp. 3, lucida, on which alone this genus is founded, being dillin- guiihed by having a berry inftead of a capfule, as is r'einarked in the place indicated. We have not had an opportunity of examining wliether this be really the cafe, or whether it be a capfule with or without a pulpy coat ; nor do we know how far WiUdenow's fuggeftion, that all the Cape fpeciea poffibly have a fimilar feed-veifel, is well founded. TEEFEE, in Geography, a town of Africa, in KafTon ; 30 miles N.W. of Kooniakary. TEEHEENGAN, a fmaU ifland in the Eaft Indian fea, N. of Borneo. N. lat. 7° 49'. E. long. 117° 30'. TEEKOOL, a fmall ifland in the Sooloo Archipelago. N. lat. 6^ 6'. E. long. 120" 25'. TEELNA, a town of Bengal ; lo miles W. of Con- thong. TEEMBIE, a town of Africa, in the country of Foota. N. lat. 10° 28'. W. long. 10"' 48'. TEEMBOO, a town of Africa, in the country of Foota. N. lat. 9° 59'. W. lang. 10° 18'. TEEN-TALLOW, a town of Hindooftan, in Guze- rat ; 20 miles S.E. of Brodera. TEERAH, a province of Candahar, W. of Paiftiawar. TEERANDAZEE, a town of Candahar; 8 miles E. of Suffa. TEERRAWHITTE, the fouth-weft point of the iiorthernmoft: ifland of New Zealand, in the. South Pacific ocean, and the N. fide of Cook's Straits. TEERWISCH, a town of Pruflia, in the province of Oberland ; 8 miles N.N.W. of Ortelfljurg. TEES, a river of England, which rifes on the borders of Cumberland, and runs into the German ocean, about ten miles below Stockton, N. lat. 54° 42'. The whole courfe forms a boundary between the counties of York and Durham. TEESDALIA, in Botany, received that name from Mr. R. Brown, in memory of the late Mr. Robert Teef- dale, F.L.S., who died on Chriflmas^lay, 1804. This accurate EngUfli botanift was, for many years, a feedfman in the Strand, but retired from bufinefs fome time before his death, refiding firft at Ranclagh, near Chelfea, and after- wards at Tumham-Grecn. He was the author of " Planttc Eboracenfes ; or a Catalogue of the more rare Plants, which ^ow wild in the neighbourhood of Caftle Howard, in the North Riding of Yorkfliire, difpofed according to the Lin- .lajan Syflem ;" publiflied in the Tranfaftions of the Lin- isan Society, v. 2. 103. The author compofed this cata- logue whilft he was gardener to the earl of Carhfle Brown !"i Ait. Hort. Kew. v. 4. 83. Sm. Tr. of Linn. Soc. v. i r. 28V Compend. Fl. Brit, ed- 2. 98 Clafs and order, Te- Vou. XXXV. Nat. Ord. Silijuo/e, Liin. Cruciftrt, fradynamia Silkulofa. Juir. Gen. Ch. Cat. Perianth inferior, of four cllii)tical, con- cave, fnull, fpreading, equal, deciduous leaves. Cor. Pe- tals four, obovate-oblong, obtufc, fpreading, with fliort broad claws. Stum. Filaments fix, (lightly club-fliapcd, afcendnig, each with a dilated ovate fcale attached to its inner fide, a little above the bafc, the two lateral ones fliorteR and mod diftant, in one fpecies wanting ; anthers vertical, of two round lobes, diltant at their bafe. Pijl. Germen fuperior, feflile, roundifli, emarginatc, tumid at one lide, flat at the other ; llyle fcarcely any ; fligma capitate. Ptrit. Pouch erea, inverfely heart-fliaped, tumid, with a longi- tudinal furrow in front ; cuncave, with an elevated ridge, ;it the back, two- cifely refembling the foregoing, except in being ufually ra- ther lefs luxuriant, that it is fcarcely poffible to diftingui/h them, except by thcjloiuers. 'V\k petals of the prefent are all of equal fize, fpreading, longer than the calyx. Sta- mens only four, two at eacli broad fide of the gcmici:, each bearing a white expanded fcale, as in the T. nudUaulii ; the two ftiorter, or more fpreading^flmc/u entirely wanting. It is much to be wilhed that feeds of this fpecies could be pro- cured from Montpelher, that we might compare both ia a living ftate. Linnxus was .ilways perfuaded of their being diftin£\. B b TEESEE, TEE T E E TEESEE, in G«frfl/)/;^', a town of Africa, in Kajaaga. N. lat. 14° 50'. W." long. 9^ 27'. TEESHOO LOOMBOO, or Lrnnoxc, a town and large monallory of Thibet, confillinir of three or four liun- drcd habitations of the Gylongs, bclides temples, maufolca, and the palace of the fovereign pontiffs, all built of ftone ; 2 miUs S.W. of Sgigatchee; TEESTA, orYoS.WPOO, a river of Afia, which rifes in Thibet, and runs into the Ganges by two llreams, one 25 miles N., the other 80 E.S.E. of Moorfhedabad. TEETBADDY, a town of Bengal ; 27 miles N.E. of TEETH, Difeafcs of the. The difeafes which affed the teeth and the parts conncftcd with them, are ufually divided into two kinds ; namely, into fuch as are termed common, becaufe they are alfo met with in other parts ; and into thofe which are called proper, being obferved only in the teeth. Hence, as the celebrated Plenck has remarked, the fubjed may be conveniently treated of under the following heads. Doftrina de Morb. Dentium, &c. Lovanii, 1796. Of Natural Denl'itlon. — The procefs by which the teeth make their way through the gums, is named dentition, (fee Dentition,) which may be divided into the Jirfl and fccond. I. Of the F'lrjl Dentition In the fixth or feventh month after birth, the Jlrjl or milk teeth make their appearance tlirough the gums. The two middle incifores of the lower jaw are thofe which mod frequently firft come out, and, in the courfe of a few weeks, they are generally followed by the two middle incifor teeth of the upper jaw. At length, after fome months more, the lateral incifors and the canme teeth (hew themfelves. The anterior molares, or front grinders, do not commonly pafs through the gums until the child is a twelvemonth old. The third and fourth grinders are cut about the tenth or twelfth year, and the dentes fapientiae at the age of twenty, or even at a more advanced period of life. The Jirfl dentition, therefore, lads from the fixth month to the fecond or third year. The fccond from the ninth to the thirteenth year. But it is to be obferved, that the interval betwixt the periods when the teeth are aftually cut, is fubjeft to very great variety, both with refpcdl to different teeth and dif- ferent children. Sometimes a month, fometimes half a year, and, on, other occafions, a whole twelvemonth will elapfe between the firft appearance of one tooth and that of another. The cutting of each tooth has two diftinft ftages ; the firft of which has been called the pcrlodus ingrtffus ; the fecond, the perlodus egrejfus. The firft ftage is ufually obferved in the fourth month, or about fix weeks before the tooth pafTes through the gums. It happens when the tooth, in confequence of its augmented fize, begins to prefs againft the bony laminae of the focket, fo as to make them recede. At this period the child feels a degree of itching in the gums, and hence it is that he now frequently puts mto his mouth his fingers, or other hard bodies, and comprefTes them by ftrongly biting them between the gums. The fecretion of the faliva is increafed. The gums become red, and fwell in the fituation of the tooth which is about to be cut. When the child fucks, he irritates and bites the nipple ; he is alfo commonly troubled with a purging and a cough; he is watchful, cries frequently, and becomes feverifh. Sometimes, however, dentition takes place fo eafily, that none of the preceding fymptoms are remarked. After a few days, the above complaints generaDy ceafe, II but not unfrcquently come on again in about a fortnight or a month, that is to fay, about the commencement of the fecond ftage, or that in which the tooth makes its egrefs. Tiien tlie gum grows white, or exhibits whitifh points iji the fituation of the tooth which is about to be cut. Thefe are caufed by the tooth itfelf, and difappear as foon as it has paffed through the gum. 2. Of the Second Dentition In the feventh or eighth year, the milk-teeth, amounting in number to twenty, become loofe, and gradually fall out, generally in the fame order in which they were cut. Soon afterwards, the fecond or perma- nent teeth rife out of the gums. It hardly ever happens, that the fecond dentition produces any dangerous fymptoms, the paffage through the alveolary procefs and gum being now fufRciently capacious. After the milk-teeth have fpontaneoufiy fallen out, or been extrafted, they are almoft always found to be deftitute of fangs. This is a circumftance which has puzzled many eminent writers, and has even given birth to the eiTOneous doftrine, that the milk-teeth are never furnifhed with fangs. Suffice it here to fay, that in the opinion of the bsft informed modern furgeons, the difappearance of the fangs is the ciTcft of abforption. Sometimes children, but more frequently adults, cut their teeth a third time. It is faid that dentition has been ob- ferved to happen thrice in an infant five years of age ; and Plenck was acquainted with a man, who was born with two of the grinding teeth, which were afterwards changed twice. (Doftrina de Morbis Dentium, p. 10.) Even a fourth dentition has been noticed by fome very experienced men. Halleri, torn. viii. 1. 30. p. 22. Of Difficult Dentition. — The advance of the teeth out of the fockets or gums may be attended with the moft alai-ming fymptoms. But experience proves, th&t in numerous children, the whole femicircle of each jaw becomes furnifhed with teeth, without the flighteft mark of indifpofition either before, or during the progrefs of the teeth through the gums. In other inftances the worft fymptoms prevail, both while the teeth are making their way out of the fockets, and through the gums ; fuch as an inflammatory fwelling of the gums, tonfils, and parotid glands ; rednefs of the eyes and cheeks ; vomiting, griping pains, tenefmus, proiufe diarrhcea with green evacu- ations, and fometimes obftinate coftivenefs and retention of urine. Fever, accompanied with cough and other catarrhal affeftions, hiccough, univerfal or partial tetanus, convulfions, &c. are the fymptoms by which, according to tlie cftimate of feveral writers, nearly a third of children are deftroyed in difficult dentition. Thefe are the common fymptoms of difRcult dentition ; but occafionally /ifc/z/wr ones arife, which not unfrcquently fubfide as foon as the tooth is cut ; as, for inftance, gutta rofacea (Lorry, Traft de iVIorb. Cutaneis, 1777, p- 4ll-)5 deafnefs ; amaurotic blindnefs ; enlargement of the knees; paralyfis ; and lamenefs of one or both legs. (P;d^ch, Ab- handlung aus der. Wundarzney von. den Zahaen, S. 25. 36.) Aphthae of the mouth ; an inflamed tubercle over the tooth which is about to be ctit ; fuppuration, ulceration, and even Houghing of the gums. Rachitis is alfo alleged to have its origin fometimes from difficult dentition. Thefe effcfts arc particularly met with in very plethoric and irritable children ; or in infants whofe bowels are over- charged with irritating excrementitious matter. Too much laxity, or too great hardnefs of the gums, is hardly ever the fole caufe of fuch fymptoms. With regard to the prognofis, it may be remarked, that favourable dentition is a fign of future health. Ricketty children almoft invariably cut their teeth with difficulty. The TEETH. The more numerous the teeth are which are making their way out together, the more fevtrc are generally the lymp- toms, and the greater is the danger. Bloated, coliive, heavy children are extremely liable to be carried off by dentition. The iucifors and grinders ufually come out with more eafe than the canine teeth. Thin children, who are aflFcfted with acute fever, and whofc bowels are open, arc in Icfs danger from dentition. Infants who have a cough during tliis pro- cefs, are often a long while in cutting their teeth. The fore- going prognofis accords with what was pronounced upon the lubjeft by Hippocrates, whofe accuracy remains unim- peached. As the fymptoms of dentition are partly inflatmnatory, being accompanied with a ftrong determination of blood towards the head and brain ; and partly fpafmoilic, in confe- quence of the fympathy of the teeth with other parts, the treatment requires that antiphlogiilic and antifpafmodic means be en>ployed. It is neceifary, therefore, 1. That the bowels be kept open with emollient clyfters. 2. That leeches be applied behind the ears. 3. That the fyrup of poppies, with nitre and one or two drops of laudanum be internally adminiftercd. 4. That the red part of the gum over the tooth which is about to be cut, be rubbed with a mixture of lemon-juice and honey, or cream. 5. That in the event of there being a tendency to convul- fions, in addition to tlie other fymptoms, a divifion of the gum be made over the tooth. By the majority of praftitioners, indeed, the lall is confidered as by far the mofl ufeful and efficient means of relief. This incifion is to be made through the gum with the common inftrument, well known by the name of the gum- lancet, which is fai- better for the purpofe than an ordmary lancet, which is apt to cut the tongue and lips, efpecially when the child moves about much. The grinding teeth re- quire a crucial incifion : all the others a fimple tranfverfe cut completely through the gum. The wound is then to be examined v?ith the finger, in order to afcertain that no tenfe fibre over the tooth continues undivided. In this country, pradtitioners feldom apply any thing to the incifion ; but abroad, it is not uncommon to put to it a mixture of lemon- juice and honey. Internally, antifpafmodics may be exhibited, particularly the fyrup of poppies, with the fpiritus ammonia: fuc- cinatus. In order to promote dentition, and render its effefts on the conftitution as mild as poffible, the celebrated Plenck re- commends, that as foon as the infant is five months old, its goims be rubbed fcveral times a day with a mixture of lemon- juice and honey, firfl over the middle incifors of the lower Jaw, and when thefc have come out, over thofe of the upper jaw. Emollient remedies are faid to relax the gums too much, the confequence of which is, that the loofe gum is (lowly and difficultly perforated by the tooth, as inilead of ulcer- ating, it is only raifed and rendered tenfe. The ufe of hard applications, as biting the root of marfh- mallows, fmooth corals, boars' tuilcs, &c. render the gums callous ; but more good might, perhaps, be derived, if fub- ftances with rough furfaces were employed. A premature incifion of the gum foon clofes again, and therefore does little fervice ; but we do not believe that the cicatrix, thus produced, can be any impediment afterwards to dentition, as many have imagined ; for it is a;i ellabliilied faft, that cicatrices in general are more difpofed to ulce- rate and be abforbed, than the original parts of the body. We would never fulTcr any idle apprehenfions of the above fort to deter us from dividing the gum, were there any chance of benefit from the proceeding. At the fame time, we do not recommend this as a prophybaic meafure, but as being proper only when illncfs, fufpeded to arife from dentition, aftually cxifts. Pranalure Denl'ilion — This is ftated to happen, when the milk-teelii come out before the infant is fix months old. Sometimes children are even born with their teelli already cut. R/.afcynky, Rliodiu8, 1'Eclufe, and Stoerck, mention a boy, who had the molares at the time of birth. Alfo in an abortion of fix months, and anotlier of feven, teeth have been obferved. (Haileri Elemcnta Phyfiol. t. vi. p. 19.) Van Swieteu met with two incifors in an abortion of five months. (Comm. t. iv. p. 742.) In a very weak male child, born at eight months, Arnold faw two perfed teeth rife out of the lower jaw ou the feventh day after birth, and grow with ex- traordinary quicknefs ; but they fell out in tlie eighth week from their firft appearance. Obf. Phyfico-Med. p. 70. In general it is to be concluded, that early dentition indi- cates great conftitutional vigour and ftrength. Of BacLzuard Denthiiii — Backward dentition is when the milk-teeth are not cut, though the child is a twelvemonth old, or even older. The proximate caufe of this delay is gene- rally referred by medical writers to languor and weak- nefs of the conilitution. But late dentition is of fcveral kinds. 1. Backward dentition from an unknown caufe fome- times happens, the teeth not making their appearance for a year after birth, notwithftanding the children have not any appearance of debility. Van Swieten met with a moll healthy female child, who was nineteen months old when fbe cut the firll tooth. Comm. t. iv. p. 742. 2. Backward dentition from the rickets. It is univcr- fally known, that in rickelty children the cutting of the teeth is a long while delayed. In thefe fubjedts the gums are always much relaxed, and wc have already Hated, that this circumllance is by no means favourable to dentition. It is probable, alfo, that in ricketty infants the teeth them- felves are a long while before they are perfeftly formed, it being well afcertained, that in fuch conflitutions the depofi- tion of the phofphate of lime takes place with extraordinary flownefs and difficulty. 3. Backward dentition of the dentes fapientix. The wife teeth are feldom cut before the twentieth year, and fome- times they firll come out in perfons confidcrably advanced in years. Hallcri Element. Phyfiol. t. vi. p. 28. 4. Late dentition in adults. Sometimes this takes phce a third time, chiefly with refpedl to the incifores ; and iii- ilances are aftually recorded, in which thefe teeth were cut in adults, or even in old perfons. Hallcr quotes examples, in which they were cut at the ages of 90, 95, 100, 1 1 8, 1 20, and later. Haileri, 1. c. t. viii. 1. 30. Wrong Situation of the Teeth This iiappcns when the teetii make their appearance in the palate, or in any place not comprifed in the alvcolary arches. The proximate caufe of this unpleafant occurrence is the preternatural formation of the young tooth in an erroneous fituation. The caies may be of different kinds, in regard to the place which the tooth occupies. 1. When a tooth grows out of the palate, it obilrufts maftication, and by rubbing againll the tongue, often makes it ulcerate. The inconvenience can only be remedied by extraftiiig the difplaced tooth. 2. The tooth may come out under the tongue. This cafe produces the fame grievances as the preceding, and requires the fame mode of relief. B b 2 3. The TEETH. ^. Tlic iiAt curious circumftancc whicli we have to rotice, is the ^owth of-tceth in the ovaries. It is now be- Kevtd, that the teeth fometinies found in thcfe organs, arc not always the relics of a previous embryo, but may be formed tfiere as a lufus naturj^. An iuftance, in which a tooth was formed in an encyfted fwcllmg in the orbit, has been lately recorded by Mr. Barnes of Exeter. See Medico- Chir. Tranf. 4. Albinus records an example, m which a tooth grew out of the maxillary proccfs below the orbit. It was concealed until it made its way out in tliis extraordinary fituation. Annot. Acad. t. i. p. 54. e. The teeth have fomctimes been obfervcd inverted, their bodies being fituated towards the jaw. Poilich, Increm. OlTium, p. 25. Albin. c. 9. Palfin, c. 9. Exlraordinayy Dijlance of theTeelh from each other — Somer times the teeth are placed too diftant apart, fo that between their crowns large intcrfpaces are left. 1. In children three years of age, the crowns of the milk- teeth are fo clofe to each other, that they are laterally as it were in contaft ; but in children feven years old, there are wide interfpaces between them. The reafon of tliis is owing to the iaw increafing in fize, while the dimenfioiis of the teeth undergo no alteration. The fecond or permanent teeth, on the other hand, (at leaft the firft twenty of them,) liave larger bodies than the milk-fet. 2. Fnquently the tartar infinuates itfelf between the crowns of the teeth, and occafions a confiderable feparation ' of them. We need fcarcely obferve, that the cure requires that the tartar fhould be taken off, and the teeth reduced into their natural pofition. 3. The deformity of which we are now treating, is occa- fionally afcrib.ible in adult fubjefts to the preternatural breadth of the jaw, in which circumftance it is abfolutely incurable. Extraordinary Chfemfs of the Teeth — The teeth may be too crowded together, fo that their crowns are laterally in contaft. This d»f«'ft may extend to feme or all the teeth. The frequent conf-quence is, that the lateral margins of thefe parts b"come carious. There are two fpecies of the diforder. 1. The firft arifes from the gi-eat width of the crowns of the teeth, and it may be afcertained by oculai- examination. In fome inftances, all the bodies of the teeth are preter- natnrally wide ; in others, only a certain number of them. The mode of cure confifts in filing off" a little of the lateral edges of tlr.' teeth affected. 2. The fecond fpecies is caufed by the uncommon (hort- nefs of the jaw. It may be known by obferving that the crowns of the teeth ai-e not too large, and that the alveolary arches are ftrikingly diminutive. Here the mode of relief is the fame as in the foregoing cafe. Extraordinary Number of Teeth. — Sometimes the number of the teeth exceeds what is the ufual (hare of the human fpecies in general ; and this particularly occurs whenever the number amounts to more than thirty-two.- Columbus has feen thirty-three (p. 34. ) ; Fauchart, thirty-three and thirty- four (edit. 2. torn. i. p. 3.>; Boui-det, thirty-fix (p. 25.); and Ingi-aflias, thirty-fix, including twenty-four grinders. Text 2. 1. With refpeft to the redundant number of each clafs, it i» when ther-" are fix incifores, or four canine teeth, or more than ten molares in one jaw. The cafe is incurable. 2. In fome inftances, the exceffive number is owing to there being a double row of teeth. This malformation may ihappen to both jaws, or be confined to one. It has been noticed in both jaws by Munick, p. 144; Plinius, e. xi. p. 623 ; C. Bartholinus, p. 464, &c. Arnold met with a boy, fourteen years old, who had al- together feventy-two teeth in his mouth. There was a double fet of the incifores, canine teeth, and three pofterior grinders ; but the anterior grinders were triple : confe- quently there were counted in each jaw eight incifores, two canine on each fide, and twelve molares. The incifores were not arranged in an even double row, but each row feemed iiTegular, and its order as it were promifcuous. The ar- rangement of the canine and grinding teeth was more regular. None of thefe teeth were affedled with caries. Obf. Phyf. Med. p. 69. 3. Thrre may be a larger number of teeth than common, in confequence of the prefence of one of the milk-teeth ; for when the latter does not fall out at the ufu.il period, the cor- refponding permanent teeth come out in the vicinity of it. Here the cure confifts in drawing the fuperfluous milk- tooth. Deju'ient Number of Teeth. — Sometimes the number of the teeth falls ftiort of what is ufual ; and this happens whenever they are fewer in the adult fubjctl than thirty-two. 1. Tlie defedlive number may be owing to a preternatural fhortnefs of tlie jaw. Sometimes one or more teeth remain concealed during life. Thus, the dentes fapientia are never cut in pcrfons who have the upper or lower alveolary arch not fufficiently long. 2. The fex alfo makes a difference ; women, generally fpeaking, having fewer teeth, than belong to men. Riolan, p. 38, and 39. 3. The deficiency in the number may proceed from a tooth having been drawn, or di-opped out. This is evi- dently a caf ' wliich can only be remedied by the infertion o£. an artificial tooth. 4. Laftly, the limitation of the number may be owing to infancy ; for, in children under feven years of age, the na- tural number of the teeth does not exceed twenty. Obliquity of the Teeth. — The pofition of fome or all the teeth may bv oblique ; an inconvenience which may be caufed by the milk-teeth not being ftied, by tartar infinu- ating itfelf into the interfpaces of the teeth, by loofenefs of the alveoli, and, laftly, by a forcible luxation of the teeth affefted. The milk-teeth feldom grow obliquely ; the per- manent ones do fo much more frequeiitly. The molares hardly ever rife in a wrong direftion ; and, in general, they are only the incifores and canine teeth which deviate from the right pofition. With regard to the effefts of fuch obliquity, we have ta obferve, thafthe teeth affected impede maftication, interfere with the articulation of words, ferioufly disfigure the cou«- tenance, and, unlefs .drawn, or replaced in their natural po- fition, may occafion incurable ulcers on the tongue, lips, or cheeks. The differences of the obliquity make thefe cafes divifible into feveral kinds. 1. The obliquity fcM-ward is when the tooth projefts an-' teriorly, fo as to hurt the cheek or lipSi Such a tooth may caufe ulceration of thefe parts, as already m:.itioned. The paiotid duft has been known to be perforated, and a fali-. vary fiftula brought on, by an oblique tooth in the upper jaw. Pafch, 1. c. p. 71. 2. The obliquity backward is when the pofition of the tooth inclines towards the centre or pofterior part of the mouth, fo as to be capable of hurting the tongue. Teeth, fo circumftanced, have fometimes been the caufe of ulcers 011 the tongue, which in point of obftinacy and malignancy have truly vied with cancer. Plenck informs us, that by draw- ing TEKTH. iiig'thc left eye-looth, lie once curr«l an ulcer, wliich had cxiftt d half a year on the left edge of the tongue. P. Jo. 3. The converging obliquity is when the crowns of the teeth converge in tht ir fituation, or even crofs each other. 4. The diverging obliquity is when they diverge. 5. The lateral obli-'—'' --'"■- I. Tartar from negka to wa(h the mouth. It originates from the gluten of the faliva, whidi, in uncleanly fcorbutio fubieAs, and great wine-drinkers, adlie.es to the teeth, be- comes putrid "with the lieat. and in putrefying depolits a lort of earthy matter upon the teeth. People who drink chiefly water are (Adorn troubled with earthy mcrullations on tlieir teeih. . , , on The cure require the removal of the tartar. Small por- tions of tartar may be taken off by means of a brufli and a thickifh tooth-powder. But when the tartar is abundant, thick, and grown, as it were, to the teeth, it mull be cut witii a fuitable mftrument placed obliquely, beginning from the neck, and cai-rying the inftrument towards the upper part of the tooth. The tartar hiring been cut, is then to be removed picc-meal. Any remaining particles of tartar may afterwards be gra- dually got rid of by the ufe of a brulh and tooth-powder. 2. Spontaneous tartar. There are certain perfons, whofe teeth are conftantly incruftcd with tartar, notwithftanding they are in the continual habit of wadiing their teeth and mouths. This peculiar d^athefis feems to confiR in an extraordinary quantity of earthy matter in the faliva. were fo tliick, that the lower lip was rendered more promi nent. Diu-ing a fortnight, Berdmore removed every day fome of the tartar from the teeth with an inftrument, and at length employed a dentifrice and brufli. The retraced gums were fcarified, and thus made to adhere to the necks of the teeth. The patient was obhged to brulh his gums and teeth three times a day, partly with a view of preventing the new formation of tartar, and partly in order that the regene- ration of the gums might be flill more promoted. But although the patient ftriftly followed this plan, his teeth and gums, in the courfe of half a year, became again covered with an extremely thick coat of tartar. Berdmore was there- fore under the neceffity of recommending the ufe of a ftiffer brufli, and a dentifrice made of fliells, for the purpofe of re- moving the tartar. P. 56. With refpeft to the treatment of tartareous incruftations of the teeth in general, it is effential to remove the tartar and clean the teeth well every day. The internal and external remedies alfo, which are ufually advifed for diffolving ftones in the bladder, may be employed, as lime-watei, pure potaffa, &c. Sometimes peppermint-water, with a few drops of nitrous acid, is ufed with advantage. 3. Tartar from the porofity of the furface of the teeth. Perfons who are in the habit of ufing acrid tindlures or pow- ders which diffolve the enamel, and make it porous, are fre- quently troubled with tartareous incniftations. The x:aufe being avoided, the mode of treatment is the fame as in the preceding cafes. 0/ Blacknefs or Necrofis of the Teeth. — This is a very pe- culiar affeftion of all the teeth, making them appear black, rough, and eroded. Sometimes only the upper part of the crown exhibits a dark-coloured erofion ; while, in other inftances, the whole fubflance of the tooth is eroded. The proximate caufe of this difeafe is imputed by Plenck to injury of the nutrient veffels of the pulp by difeafe, before 6 put on a black colour. The cure demands the immediate exhibition of anti-fcor- butic medicines, with the affiftance of which the fecond teeth are fometimes perfeftly healthy. 3. Blacknefs of the teeth from the fmall-pox. In chil- dren who are feized with malignant fmall-pox during the firft or fecond dentition, a black erofion of the teeth is fre- quently obferred. The cure requires the repeated adminiftration of purga- tives, and then the Peruvian bark. 4. Blacknefs of the teeth from mealies. The fame black erofion of the teeth has been remarked after fevere cafes of meafles. The cure is the fame as in the .foregoing inftance. All the preceding fpecies of necrofis, when they affect the milk-teeth, are to be ftopped by their proper fpecific reme- dies, in order that the fecond fet of teeth may not be af- fefted ; but when thefe are difordered, the cafe is irreme- diable. 5. Blacknefs of the teeth from tart.ir. The tartar it- felf fometimes tunis black, and even after its removal, the teeth often remain of a blackifli colour, wliich cannot be effaced. 6. Blacknefs of the teeth from the appbcation of mineral acids. Nitrovis acid diluted with water, in a fliort time, whitens the teeth ; but foon afterwards renders them black and friable. Plenck has feen the lateral edges of the teeth turned black and corroded by the employment of mercurial cofmetics. 7. Blacknefs of the teeth from cancer. Plenck has twice noticed in men, who were afflifted with ulcerated cancers of the lower lip, the teeth disfigured with a deep black colour. But it is to be remarked, that the affeftion was confined to the enamel, and did not extend to the bony fubftance of the fangs. Preternatural Co/our of the Teeth, — This is a change of the natural colour of the teeth to a yellow or alh-eolour. I . Difcolouration from negleft to clean the teeth. The fordcs. TEETH. fordes, which colkft upon the teeth, dimuiifli their glofs and wliitenefs, and render them yellow or afli-coloured. The cure confirts in removing tlic fordes. 2. Dilcolouration from age. The wliitenefs and polifh of the teeth, peculiar to youth, change in the advanced period of life into a dull yellow, which is totally irre- mediable. 3. Difcolouration from the ufe of mercury. The teeth are difcoloured not only by the internal, but alfo by the ex- ternal ufe of mercury. Hence gilders, and other .irtizans T7ho make ufe of mercury, have their teeth ftaincd of a leaden colour. Plenck has feen the fame fort of disfigure- ment occafioned by cofmetics containing quickfilver. The cure requires that the mercury be got out of the fyftem as expeditioufly as poffiblc. 4. Difcolouration from fcurvy, &c. Scorbutic perfons are efpecially noticed as having the colour of the teeth fpoiled. Venereal and ricketty fubjefts are alfo frequently afFefted in the fame way. To this head muft likewlfe be referred the difcolouration of the teeth obfervablc in mariners. 5-. Difcolouration of the teeth from pregnancy. In preg- nant and fuckling women, the luftre of the teeth is often remarked to leflen, and thefe parts to be difcoloured. Lorry, Tra£t. de Morb. Cutaneis, p. 61. It is fuppofed that this change of the teeth is frequently connefted with the bad ftate of the milk, the evacuation and correftion of which are the means of cure advifed by feveral authors. 6. Difcolouration from taking hot food. Perfons who make a praftice of drinking very hot hquids, or of chew- ing fubftances which are top warm, have the luftre and whitenefs of their teeth deftroyed. It is queftionable, whe- ther the beautiful white colour of the teeth of animals in general may not be owing to their abftainmg from hot aliments ? 7. Difcolouration from dentifrice powders and tinftures containing mineral acids. Thus, burnt alum and fpirit of nitre for a (hort time whiten the teeth ; but a little while afterwards, the enamel turns pale and falls off in bits. 8. Difcolouration from the fmoke of tobacco. The oil of this plant is well known to have the effeft of turning the colour of the teeth to a dark brown or black. 9. Difcolouration from thinnefs of the enamel. When the vitreous fubftance is in a certain degree worn away, the bony fubftance, which is yellow, can be feen through it. The defeft is incurable. 10. Difcolouration from an internal caries of the tooth. Such a tooth lofes its luftre and whitenefs, and becomes pale, afti-coloured, dark-brown, and at length black. Here the only mode of cure is to extraft the difeafed t®oth. 11. Difcolouration from the ufe of madder. It is re- marked, that only the bony part of the tooth is ftained red by this root, but not the enamel. The rednefs alfo does not extend itfelf to the portion of the tooth already formed ; but only to the part formed while the animal is fed with madder. This coloi:r hkewife never difappears : circumftances much againft the doftrine of the teeth being vafcular. 12. Golden difcolouration of the teeth. This fpecies is brought on by art. Fragility of the Teeth, — In this affeftion, the cohefion of the fubftance of the teeth is fo flight, that a very inconfi- derable force makes it break. The proximate caufe of this fragility of the teeth is pro- bably connefted, in many examples, with fome imperfeftions sn their original growth. The varieties defcribed by writers are as follow : Vol. XXXV. 1. The fcprbutie fragility. In people affliAcd with the fcurvy, the bodies of the teeth by degrees become fo fragile that they drop out piccon1e.1l. 2. Fragility from rickets. In children thus affefted, the milk-teeth, foon after they have been cut, become dark- coloured, are cafily broken, .ind ufually fall out in pieces. 3. Fragility from old age. In old age the teeth .ve apt to be broken in biting With force, and to fall out piece- meal. 4. Fragility from the application of mineral acids or burning oils. The abufe of fuch medicines, too long con- tinued, brings on a fpecies of fragility, which admits of no mode of cure. 5. Fragility from caries. Teeth, which are excavated by caries, and rendered thin, are readily broken in mallica- tion, and drop out in jiieces. All the difl'erent fpecies of fragility arc incurable. MoUilies, or Pretcriuiturjl Softncfs of the Teeth. — This dif- eafe is fo remarkable a foftnefs of the fubftance of the teeth, that it can almoll becompreircd together by the fingers. The proximate caufe is faid to be either too great a quantity of the gluten, which connects the earthy particles together, or elfe a deficiency of tlie earth. The fpecies arc : 1. Softncfs of a milk-tooth. Plenck extrailcd from a girl fevcn years of age, a canine milk-tooth of th« lower jaw, which was livid and foft, like cartilage, and was com- preflible by the fingers, efpecially at the fang. Dc Morb. Dentium, p. 39. 2. Softnefs of the teeth from farcoftofis of the fang. Sometimes the fang of a tooth is abforbed, and a fungous fubftance fills up its place. This cafe has been abfurdly in- ftanced as a fpecimen of mollities of the teeth. 3. Softnefs of the teeth from fcurvy. It is aflertcd, that in the fcurvy, the teeth have been fometimes fofteiTcd and enlai-ged. (Grainger Hift. Febris Anom. p. 6.) But fuch accounts muft be incorred, fince they imply a vafcular or- ganization of the teeth. It merits attention alfo, that in certain dead fubjcCls, whofe bones are all affetled with mol- hties, the teeth are found pcrfeftly hard. Preternatural Angles, or Sharpnefs of the Teeth. — Some- times the form of a tooth is fo acute, that it hurts the neighbouring parts by pricking them. The effefts of fuch a tooth are irritation of the tongue, or of the inner furface of the lips, or check. Hence in- flammation of thefe parts, or an ill-conditioned ulcer oppofif e the ftiarp portion ot the tooth, curabla by no means Vrlir.t- foever, except the removal of the angle or fli.vpnefs. The fpecies are afcribablc to the particularity of the caufe. 1. Irritating angles, or (liarpnefs from malformation of a tooth. In this caie the tooth has a found appearance, and the crown is felt to be too pointed or (harp. 2. Irritating angles, or Iharpncfs from an oblique frac- ture of a tooth ; as fometimes happens from biting hard nuts and other fubftances. The cafe can be detcitcd on ocular examination, 3. Irritating angles, or fharpnefs from the tooth being worn obliquely. This is the moft common cafe. The cure requires that the pointed or (harp part of t!ic tooth be removed cither with a file or a pair of cutting forceps ; but if this cannot be acconiplilhed, the tooth (hould be pulled out. Fradurcs of the Teeth. — A frafture of a tooth is a folu- tion of it into two or more fragments. The folution of continuity may be tranfvcrfc, oblique, or comminuted. The moft common kind of fraAure is the ft- paration of a particle of the enamel from the reft. C c The TEETH. The offfiSs r.re, confiderablo pain in the tooth, and fomc- fimes convuliions ; an implcal'ant I'onfation in the tongue upon its touching the fradhire. An oblique fradure hurts the tongue, hps, or check, by its pointed form. The broken furface of a tooth not unfretiuently becomes carious. The fpecies .ire : 1. Frafture from violence ; as occurs in a fall upon the teeth, a blow on them, or in biting the hard ilones of fruits, or in an iinperfeft extraction of a tooth. 2. Fradure from previous caries, or fragility of a tooth. When either of thefe caufes is prefent, a very inconliderable force will break the tooth, and fplit it into feveral pieces. The furface of the fraftured part ought to be kept covered for feveral days with mallich. The fraAure of a tooth is an incurable accident. Fi/fures of the Teeth A fiffure of a tooth means a folu- tion of continuity, like a mere line, or a crack in the enamel. For the mod part, the caufe originates from biting the ftones of fruit, or other hard fubltances. The effects are pain and tendernefs of the tooth, and, in confequcnce of the entrance of fordes into the fifliire, caries is frequcntiv produced. The treatment confifls in filling up the fiffure, while recent, with gum maftich. Luxations of the Teeth The luxation of a tooth means the difplaccment of it from its natural pofition in the focket, occafioned by violence. The caufes are biting hard or refilling bodies with ex- trertle force ; falls or blows upon the teeth ; but, mod commonly, the accident is brought on by an imperfeft and imfucccfsful attempt to draw a tooth. The disfigurement, arifing from the wrong pofture of the tooth, is the chief efFeft. The tooth may be put into its right pofition again with the aid of a pair of forceps. Stupor of the Teeth This is a very fingular fenfation in the teeth, which cannot be defcribed by words. It was called by the Greeks hismodia, from j^i^inJixa, olflupefco : the French term it I'agacement des dents. The proximate caufe is a peculiar affeftion of the nerves ■of the teeth. With regard to the effefts, this annoying fenfation pre- vents maftication, and excites a preternatural fecretion of the faliva ; while it is exafperated by the entrance of air into the cavity of the mouth. For the moft part, the complaint is only of a tranfient nature. The fpecies are : 1 . Stupor of the teeth from eating unripe fruit. Hence wc find, the affeftion is often caufed by eating four cherries, currants, goofeberries, &c. This cafe may be relieved by chewing fweet almonds, or applying fomentations to the teeth. 2. Stupor of the teeth from vomiting dark bilious matter from the ftomach. The fecretions thrown up from the llomach are fometimes of an auftere acid kind, and therefore may give rife to this affeftion of the teeth. Plenck has many times noticed the occurrence in hypochondriacal fub- jeds. Doftrina de Morb. Dentinm, p. 42. The cure demands emetics and abforbents, or mild alka- line remedies. 3. Stupor of the teeth in ricketty fubjefts. The teeth of perfons who labour under rachitis, are, on account of their greater fenfibility, particularly expofed to the attack of this complaint. Befides the radical cure of rachitis, which is to be at- tempted by tonic and abforbent medicines, external palliative means are not to be omitted 4. Stupor of the teeth from harft r.oifes. Thus the pain- 7 ful fenfation is brouglit on by the acute rough found made by filing various fubltances, fcraping (late, favviug (lone, &c. In a fright, the gnalhing of the teeth has been obferved to have a fimilar effeft. Odontalgia, or Tooth-ache. — This fignifies pain in one or more of the teeth ; the etymology being oJoi/f, dens, and i.'hyiji, doleo. The proximate caufe is an irritation of the nerves which are dillributed to the teeth and gums. As for the effedls, the pain in the teeth fometimes rifes to fuch a degree, that relllcfTnefs, fever, delirium, fpafms, convulfions, faintings, &c. are produced, efpecially in per- fons of irritable conllitutions. The cheek of the painful fide very often fwells upon a little abatement of the complaint taking place ; the patient drivels confiderably ; and maftication cannot be performed without an increafe of iuffering. The different fpecies of the complaint are as follows : 1. Odontalgia rheumatica, or the tooth-ache occafioned by the rheumatifm affecting the gums and teeth. The fymptoms of this cafe are, pain in the teeth, without any thing ailing the gums, as far as can be detected by ocu- lar examination. The cure demands purgative medicines, and afterwards fudorifics. Externally, wine and water ; or vinegar, in which the radix pyrethri has been boiled ; the fmoking of tobacco ; finapifms to the cheek ; or blifters upon the temples, or nape of the neck ; are efteemed amongft the moft eligible means of relief. 2. Odontalgia catarrhalis. This cafe is moftly brought on by a cold damp atmofphere and the fuppreffion of per- fpiration, or from fudden expofure to cold while the body is very much heated. This fpecies may be known by the prefence of the ufual fymptoms of catarrh, the difcharge of mucus from the noilrils, cough, occ. It admits of relief by the fame means which are proper for a catarrh, or the rheumatic fpecies of tooth-ache. 3. Odontalgia inflammatoria. The complaint is brought on by inflammation of the gums. Such inflammation often- times affedts, at the fame time, all the neighbouring parts, as the cheeks, ears, ej'es, and indeed fometimes the whole head. Frequently the cafe brings on, in a flow manner, the form- ation of abfceffes between the gums and cheek, which ab- fceffes, after a great deal of violent pain, burft. This tooth-ache is exafperated by every kind of warm medicine, whether given inwardly, or ufed as an externa] ap- plication. The cure of the complaint in its early ftage demands venefedtion, purgatives, nitre, and other antiphlogiftic re- medies. Externally, there is no better application than the aqua plumbi fuperacetatis. 4. Odontalgia arthritica, or odontagra, arifes on the abatement of a gouty affedtion of the joints, but fubCdes again as foon as the latter difeafe recommences. 5. Odontalgia venerea. Both the venereal difeafe itfelf, and the merciu-y which is adminiftered for its cure, not unfrequently give rife to fevere tooth-ache. In each of thefe cafes, purgatives are indicated, and afterwards an emulfion of gum arabic, the warm bath, and the compound decodtion of farfnparilla. Here drawing the teetli is faid to be extremely dangerous, as it is apt to bring on inflammation of the throat, and even fatal confequences. 6. Odontalgia fcoi-butica. This cafe may be known by the TEETH. the exifteilce of the ufual fymptoms of the fcurvy. In ad- dition to an intolerable itching in the gums, very acute pain is alfo often experienced. With refpeft to the cure, topical remedies muft be em- ployed, together with fuch external and internal medicines as are generally requiilte for the fcurvy. 7. Odontalgia gaftrica is an acute pain in the teeth and gums, arifing from a vvrojig ftate of the prima: vis. It may be cured by emetics, purgatives, and other me- dicines calculated to put the bowels and llomach into order again. Odontalgia gaftrico-vcrminofa. People who have worms are frequently tormented with the tooth-ache. Authors at- tempt to explain the faft as follows : they ilate that worms in the inteiltines irritate the great intercoftal nerve, which has a ftrong fympathetic conneftion with the nerves of the teeth. The ciu-e demands purgatives and anthelmintic remedies. 8. Odontalgia a ventriculi debilitate, feu irritabilitate. It fometimes happens that men and hyfterical women, whofe ftomachs are weak and irritable, are afflifted with excru- ciating tooth-aches, which yield to no remedies but antifpaf- modics, ftomachics, and tonics. 9. Odontalgia gravidarum. In the tooth-aclie originating "from pregnancy, the pain often fhifts from one tooth to another, and comes on very repeatedly, although the teeth are frequently perfedlly found. Sometimes the pain is merely fympathetic ; but, in moft inftances, it is connefted with that plethoric ftate of the female conftitution known to prevail during pregnancy. Venefeftion is, therefore, the chief means of rehef, and then topical applications may be ufed. It is a queftion, whether the operation' of drawing a tooth fliould ever be performed on pregnant women. There are fome women who have fuch a dread of the inftruments for tliis purpofe, that the very fight of them brings on the danger of convulfions and a mifcarriage. But, on the other hand, the pain may be fo violent as to create a chance of the fame evils. Here much addrefs is requifite to per- fuade the patient to undergo the operation, and at the fame time great prudence not to advife it, unlefs rendered abfolutely indifpenfable by the feverity and obilinacy of the pain. 10. Odontalgia nutricum. Women who fuckle are alfo particularly fubjeft to be afBifted with excruciating tooth- ache, whether the teeth be found or carious. When the pain refifts the ufual means, efpecially opium and venefec- tion, the tooth muft be extrafted. This cafe has been fup- pofed to depend upon a certain fympathy between the mamma; and the teeth. 11. Odontalgia from cutting the dens fapientis. Some- times great and long-continued pain, delirium, and other alarming fymptoms take place, until the tooth has made its way out, or the gums have been divided. 12. Odontalgia hyfterica. This fpecies of tooth-ache often affedls hyfterical women a long while, notwithftanding the teeth may be perfeftly healthy^; nor does it always yield to opium, nor even to the operation of extradting feveral of the painful teeth. The treatment requires the warm bath, emollient fomen- tations to the cheeks, and gargles of the fame quality to the mouth. 13. Odontalgia from the teeth being worn away. The bony fubftance of the teeth is fo fenfsble, when deprived of the enamel, that on coming into contaft with air, or food, at all too warm, or cold, the moft intolerable pain is excited. 14. Odontalgia from tartar on the teeth. The tartar feparates the gums from the neck and fang of the tootli, fo as to expofe the latter parts to the cold air, and the tlimu- lating quality of the food. Hence, it is obvious, p;>in mulf be the confcquence. Tlie radical cure can only be accomplifhed by removing the tartar. The complaint may be palliated by the common applications for the relief of tooth-ache. I 5. Odontalgia from a frafture of the body of the tootli. In tlijs cafe the nerves of the remaining portion of the tooth are expofed to the air, and fometimes become afTcfted with extreme pain. Writers recommend for the purpofe of relieving thiti complaint, either applying the cautery to the furfacc of the fraftured tooth, or elfe covering it with wax, or gum maftich. 16. Odontalgia verminofa. Whether the tooth-ache can ever really arife from the prefence of worms in a carious tooth, is doubtful. Plenck conceives the occurrence pof- fible, and he propofes as a means of cure the employ- ment of a gargle containing the muriates of ammonia and foda. 17. Odontalgia periodica fignifies that form of the tooth- ache, which comes on every other day, and refembles in its periods of attack an intermittent fever. In the treatment, authors recommend the ufe of'purgatives, emetics, and the Peruvian bark. 18. Odontalgia cariofa. It is not every fort of caries of the teeth which is accompanied with pain ; but only the internal or external humid kind of caries. In the dry caries, and alio in the humid, when all the nervous filaments of tlie bone of the tooth have been deftroyed by it, the carious tooth remains free from pain. In the tooth-ache from caries, the following modes of relief are recommended : 1. Preffure upon the nerve which comes out of the jnfra- orbitary canal of the fuperior maxillary bone. 2. Preffure upon the nerve whicli paffes out of the canalij mentalis of the lower jaw-bone. 3. Sulphuric acid apphed to the carious part of the tooth by means of a probe. Plenck has fometimes found this plan ufeful. 4. Vinum pyrethri, vel rutre, or ftrong vinegar. 5. Sinapifms to the cheek. 6. Blifters to the nape of the neck, and behfhd tlie ears. 7. The application of a magnet to the painful tooth. 8. Oil of cloves introduced into the carious tootli. 9. Camphorated milk retained for a time in the mouth. 10. Burning the nerve with a heated probe. 1 1 . Opium applied to the carious tooth, or admiiiiftered internally, 12. Luxating the painful tooth is another mode of ixlief which has been propofed. With the aid of a fuitablc iii- ftrument the tooth is to be turned a httle round in its focket, and then turned back again into its natural pofition. Thus, the fmall nerve, which enters the hole in the fang, is cither broken or rendered paralytic. Caries of the Teeth, — This fignifies an erofion of the fub- ftance of the teeth. The dentes molares are more frequently than the reft of the teeth affefted with caries, and the dentes fapiciitiie oftener than any of the other grinders. Caries of the teeth varies in rcfped to its Ctuation, figure, nature, and caufe. In regard to fituation, the caries may take place in one, in feveral, or in all tlic teeth. It may occur upon the ex- C c 2 ternal TEETH. ternal or internal furface of a tooth ; upon tlie l>ody or the fang of a tooth ; or it may affert every part ot it. As to caufcs, the caries may proceed from fuch as are properly called external, as a fiiTure ; a wearing away of the enamel ; fordcs adhering to the teeth ; tartar ; a detach- ment of the glims ; a violent effort to bite, by which the apex of the fang, or the bottom of the fockct, is contufcd ; the ufe of mercury ; cofmetics ; the application of acids, efpecially thofe which are termed mincrj ; dentifrice powders containing alum ; cold damp air ; fmoking, or chewing tobacco, &c. Sugar has been imagined to he hurtful to the teeth ; but probably without real foundation. General de Beaufort ate every day for forty years a pound of fugar, and lived to the age of fevcnty. After death, his vifcera were found free from difeafe, .ind his teeth found. (Anecdotes de Medccine, torn. ii. p. 35.) Plenck put a healthy tooth into fome fyrup diluted with water, and kept it there two months, at the end of which time it was taken out, and found to have undergone no change. Doftrina de Morb. Dentium, p. 52. The internal caufes are fcurvy, rachitis, fcrofula, &c. In relation to the particular nature of caries of the teeth, there are two fpecies ; one termed humid, which quickly deilroys the tooth afFeftcd with it ; the other is the di-y ca- ries, which advances (lowly, lafts a long while, is altogether indolent, and cannot be palliated by any known remedy. The effefts of caries are fetor of the breath; repeated attacks of tooth-ache ; infeftion of the neighbouring teeth ; and not unfrcqueutly the correfponding tooth on the oppo- fite fide of the mouth becomes alfo affedled with caries, as feveral authors whimfically fuppofe, from nervous fympathy. In the fituation of the difeafed tooth, efpecially, over the carious fang, the gum is moft. commonly attacked with a parulis, or epulis. Sometimes chronic ophthalmy originates from the irritation of the difeafed fang (Journ. de MCd. tom. xxxvi.) ; or elfe a fiftula of the gums or cheek, or an ozaena of the antrum Highmorianum. Even a locked-jaw has been known to arife from carious teeth. Truka Com. de Tetano, p. 151. In refpeft to figure or form, the following fpecies of caries may be eftablifhed. 1. Caries foraminofa, or a carious canal, which runs from the external furface of the crown, and penetrates the fub- ftance of the tooth. In the treatment, it is proper to clean out the carious canal with a needle, and by injefting a fluid into it. Then it is to be burnt with a heated needle ; and, laftly, elofed with wax, maftich, gold, or lead. 2. Caries of the whole crown or body of a tooth. When the middle of the crown of a tooth is eroded in fuch a man- ner, that the caries is wider fuperficially than it is more deeply, then the gold, or lead, or whatever is ufed for filling it up, cannot be retained in its place. In this circumftance it becomes neceffary to burn the carious furface with a fuitable inltrument ; or to deftroy it with cauftic applications ; or to apply antifeptics. But when, notwithttanding all thefe means, the caries yet fpreads, the tooth ought to be extrafted, in order to re- move the pain, prevent the occurrence of other difeafes, and not incur the rifk of the tooth breaking in pieces in the attempt to take it out at a later period, vvhen it may be excavated and rendered too thin. 3. Caries maculofa. If the fuperficial fpot only appear upon the external furface of the tooth, it may be removed with a file. 4. Caries ftriata. Whfn the caries occurs in the form of a longitudinal black (Ireak, it is cither in the middle of tlie crown, or on the lateral margins of the tooth. This cafe may be oecafioned by the teeth being placed too clofely together, and alfo by the ufe of cofmetics. It admits of being taken off with a file. 5. Caries of tlie fang of a tooth. The body of fuch a tooth is fometimes found. The tooth, however, is fre- quently painful, the cheek of the affeAed fide, and the gum near the painful tooth fvvell, and an abfcefs is formed, which is lefs common in the other fpecies of caries. The cure requires that the tootli ftiould he drawn out as foon as the inflammation has fubfided, It is reckoned dan- gerous to perform the operation while the parts are much inflamed. 6. Internal caries of a tootli. In this complaint the tooth is painful, and exhibits a leaden colour, and if it be fliaken with an inflrument the pain is confiderably ex- afperated. Thus the difeafed tooth may be detefted ampngfl many which are healthy, even when feveral of them are thought by the patient to be unfound. The cure requires the tooth to be extrafted. 7. Caries of all the teeth. This afHiftion is fometimes induced by the fcurvy, and rachitis. The radical cure is of courfe impoffible ; but the progrefs of the caries can be checked by the internal ufe of antilcorbutic medicines, the remedies againft rachitis, and by giving affa-foetida. Externally, antifeptic wafhes may be ufeful. Plumhatio dentis is the fiUing of the carious cavity with thin fheet-lead, tin, or gold. Gold is preferable to lead, which is apt to be afted upon and diffolved by acid food, and may therefore produce the faturnine colic ; but, on the other hand, lead is more cafily introduced into the tooth, and it can be more firmly fixed there. Some dentiils give the preference to tin. The operation is proper, if the carious tooth has a narrow- entrance. It can only be performed on the incifors, canine teeth, 'and firfl grinders, which are furnifhed with but one The operation is contraindicated, when the orifice of the caries is wider than its bottom, as the lead cannot then be retained. Alfo, when pain and inflammation are prefent, the introduflion of the lead muft be deferred until thefe fymptoms have fubfided. The inftruments for this operation are, 1. The introduftor. 2. The perforator. 3. The planatorium. 4. The file. 5. The plates or leaves of gold, about three or four times as thick as thofe commonly met with. As for the operation itfelf, 1. A thin plate of lead, tin, or gold, is to be put into the hollow of the tooth, by means of the inltrument called the introduftor. 2. The lead or gold is to be gradually compreffed more and more clofely, fo that it may fill up well the (ides of the cavity. This is to be done with the planatorium. Then fome holes a»e to be drilled in the metal with the perforator, and thefe are to be filled with lead. Laftly, the place is to be rendered even and fmooth with the file. The lead, for fome days after the operation, proves r.-ither difagrccable to the tongue ; but, in a ihort time, the patient is habituated to it, and he experiences no longer any fuch in- convenience. Sometimes pain and inflammation follow ; in which cafe, the lead muft be taken out for a few days with a pointed ioftrument. 8 There TEE TIL [ There liave been pcrlons who liave had load in their teeth feveiity years, and upwards, without any annoyance from it. Of drawing or extrading a Tooth. — We fhall conclude this article with a few obfervations upon the furgical operation of extrafting a tooth from its focket. The following cafes make the performance of it necef- fary. 1. A carious tooth, producing a fe\ere degree of pain, which can be abated by no remedies. 2. A (liarp tooth, which irritates and hurts the tongue, and does not admit of being amended with the file. 3. An ulcer, or abfcefs of the maxillary finus. 4. A tooth which renders the focket carious, or caufes abfcefles, or excrefcences of the gums, fiftulx of the jaw, or fome other troublefome complaints. 5. A milk-tooth not being fhed at the ufiial period, and its prefence forcing one of the permanent ftft to grow in a wrong direftion. 6. A tooth growing out of the palate, or in any otlier unnatural place. On the other hand, the operation is contraindicatcd, when the gums are highly inflamed ; or when a tooth-ache, excited by mercury, or the fcurvy, is prcfent. Drawing a tooth, in thefe circumftances, might give rife to exteniive inflam- mation and angina in a dangerous degree. The common inftruments are, 1. The odontagra. 2. The pelicanus. 3. The clavis, or key. Thefe three inftruments are objeftionable in one refpeft : namely, they pull the tooth out of its focket obliquely ; and hence they often break the alveolary procefs, or the tooth itfelf. 4. But the tooth-inftrument which Aitken has defcribed, draws the tooth out of the focket perpenaicularly ; and, on this account, has an advantage. See Eftays on feveral im- portant Subjefts in Surgery, London, 1771, p. 196. 5. The tooth forceps. fi. The pes caprinus, or punch. The molares, when they can be firmly taken hold of, may be extrafted with either of the firft four inftruments. The incifores, canini, and firft molares, may be drawn out with the forceps. Stumps and fangs cannot be taken hold of with thefe in- ftruments ; they muft, therefore, be puftied out of the al- veolary procefs with the pes caprinus, or punch, and then be removed with a pair of forceps. The patient and furgeon are to place themfelves as follows. I . If the tooth be in the up.per jaw, and it is to be taken out with the odontagra, pelicanus, or punch ; or if the tooth, which is to be drawn, is in the lower jaw, the patient muft be feated in a low chair, or on the ground, the furgeon ftanding behind him. ;. But if the tooth is to be taken out with the key, or from the upper jaw with the forceps, the patient is to fit in a common chair, and the furgeon is to ftand in front of him. The following are the different methods of performing the operation. I. Of extrafting a tooth with the odontagra. The inner gum of the tooth about to be drawn, is to be deprefted with the claw of the inftrument nearly down to the alveolary procefs. The other part of the inftrument is to lie apphed to the crown of the tooth. While the thumb is employed in making iirm preffurc upon the claw, the liandle is to be held with the fingers, and, under the diredion of tlie palm, the tooth is to be raifed perpendicularly from its focket. By means of the fcrew, which admits of- being turned, the inftrument may readily be adapted to the larger teeth. 2. Of drawing a tooth with the key. The key is applied to the tooth nearly in the fame way as the odontagra, except that the thumb of the other hand is placed upon the claw. At the commencement, the key is to be turned verj* gradually ; and the tooth, when it yields, is to be cautioully and (lowly raifed, left it flip away, and re- main adherent to the gum. 3. Of drawing a tooth with the pfclicanus. 'J'he claw of this inltrumcnt is to be applied to the infide of the neck of the tooth, while the rotula is to be put upon the two neighbouring teeth. The thumb of tlie liand not holding the inftrument is to be applied to the infide of thein, fo as to counteraft the refiftance of tlie rotula. 4. Of the cxtradtion of a tooth with the forceps. The neck of the tooth being firmly grafped with the forceps, is to be gradually moved, until it is fufficicntly loofened to admit of being taken out perpendicularly. 5. Of taking out a tooth with the pes caprinus, or punch. The two points of the inftrument are to be firmly applied, under the gum, to the lower part of the neck of the re- maining portion of the tooth. The tliumb of the hand not thus employed is to be covered with fome linen, and ap- plied internally. The fang is then to be puflicd out of the focket, and removed with a pair of forceps. With regard to the fymptoms arifing after the operation : a flight hn?morrhage, and a fwelling of the gums and check, are the ufual confequences. Thefe, however, are free from danger, and, when the mouth is waflicd with a gargle of tepid vinegar, they are foon relieved. The more ferious confequences, which fometiines occur after the extraftion of a tooth, are, 1. A violent and dangerous degree of hxmorrhage. 2. Alarming inflammation of the gums and cheek. 3. Abfcefles of the gums ; vei-y apt to take place, when the gums have been confiderably bruifed by the inftrument, or when fphntcrs of bone are left b.^hind. 4. A frafture of the alveolary procefs, or of the pailate. This accident is moft hable to happen, when the fangs of the teeth diverge, or when the fang and focket have grown together by the procefs of olTification. The cxiftence of the laft cafe may be known by the neck of the tooth being curved. Here the tooth fhould always be drawn out to- wards its concave fide. 5. Diflocation of the jaw. This may occur, if thCmouth be too much open, or the lower jaw be brought too much forward, in the operation. The luxation ought to be im- mediately reduced. See Lvxation. 6. Frafture of the jaw. See Frac ruuE. 7. Caries of the focket. 8. Laftly, frafture and luxation of the tooth may be the confequences of an unfuccefsful attempt to perform the operation. In the preceding remarks, we have been chiefly aflifted by Plenck's excellent compendium, entitled " Doftrina de Morbis Dentium," &c. Lovanii, 1796. Some interefting obfervations on the difeafes of the teeth, particularly with a view to the qucftion whether thefe parts are vafcular, will be found in the article CitANiui.f. For a defcription of the difeafes of the gums, we refer to Gums, Difeafes of. A Daniflt TEETH. A Danilh pliyficiaii, named H.ngeriip, maintains in cer- tain tlicfes that otic may licar with the teeth. As to animals, there are fome lilhcj whicli have teeth on their tongues, as trouts ; others have them at the bottom of the gull>-t, .IS the cod-li(h ; fome, as the great fea-dog or (hark, called canis carcharias, iiave throe, four, or five rows of teeth on tlie fame jaw ; tlic crocodile three, and thofe all incifors ; vipers have two large crooked canine teeth, which «re moveable, .md ordinarily lie flat, only being raifed when they would bite ; and the rana pifcatrix, fea-frog, or fea- devil, has whole rows of the like moveable teeth. The toad and cuttle-filh have no teeth, and yet they can bite. See ylnatomy of FisH. Teeth, Chemical Analyfis of. The teeth clofely re- femble bone in their compolition.. The bodies conlifl of a cartilaginous bafis, united with phofphate of lime, and fmall proportions of other earthy falts. The enamel differs fo far only from the bodies, that it contains no cartilaginous matter, bnt confifts entirely of earthy fubftances. The teeth have been often examined, and with various refults, according to the ftate of chemical knowledge at the period of examina- tion. We do not think it neceflary to give an account of all that has been faid on the fubjeft, but fhall confine our attention principally to the lateft and mod perfeft analyfes. We (hall begin with the analyfis of Mr. Pepys : he found the enamel of teeth compofed of Phofphate of lime - Carbonate of lime - Lofs and water 78 6 16 The bodies of the teeth, according to the fame chemift, confift. of the following proportions. Roots of tlie Teeth. Teeili of AduUs. F.rft Teetlt of Children. Phofphate of lime - Carbonate of lime Cartilage Lofs - - - 58 4 28 10 64 6 20 10 62 6 20 12 100 100 100 A much more complete analyfis, however, of the enamel of teeth has lately been made by Berzelius. He gives the following table of his refults, compared with the compofition of the .bones of the fame animals. Drieil Human Bones. Enamel of Human Teeth. Bones of Oxen. Enamel of Ox Teeth. Cartilage Blood-veffels Fluate of lime Phofphate of lime - Carbonate of lime - Phofphate of mag-' nefia Soda, muriate of foda, water, &c. 32-17 '•'3 2.00 51.04 11.30 1. 16 1.20 3-2 85-3 8.0 1-5 2.0 133-30 2.50 3-85 2.05 2.45 } 3-56 4.00 81.00 7.10 3.00 1-34 too 100 100 100 Tiius confirming a difcovery made many years before by Morichini, an Italian chemift, namely, that the enamel of teeth contains fluoric acid ; a circumftance which had been called in quellion by later inquirers. FoJJile ivory and bone have been found by Fourcroy and Vauquelin to retain proportions of animal matter, varying from 45 to 15 per cent. ; a curious fatil, and highly illuftra- tive of the powers of intimate mixture, or rather perhaps cliemical union, in preventing the deftruftion of organic fubftances. Tketh, jlrtificial, are thofe fet in lieu of natural ones, whicli are wanting. See Teeth, Difeafes of. Teeth, Mark of, in the Manege. See M.-VRK and Eye of a Bean. See alfo Teeth, infra. Teeth of Fijl^. See Anatomy of Fish. Teeth, in Rural Economy, little bones fixed in the jaws, which ferve not only to reduce the food and nourifliment, but lliew the age in fome animals. The horfe has forty- teeth, including the tufhes, which are thus diftinguiftied. Twenty-four are called grinders, being placed at the bottom of the mouth, beyond the bars, twelve on each fide of the channel, ^'^z. fix above, and fix on each fide. Thefe teeth continue, and do not give place to new teeth in their room, fo that they are of no ufe in diftinguiftiing a horfe's age ; and they are fubjeft to wolves teeth. In re- gard to the other fixteen, twelve of them are called in their infancy milk or foal teeth, and the remaining four go by the name of tujlxs. The twelve foal teeth are (hort, fmall, and white, and are feated on the fore -part of the mouth, fix above, and fix below : and thefe change and call, to give place to others ; which, in procefs of time, become long, large, and yellovvifh. Thefe new teeth are diftinguiftied by different names given them, according to their putting forth ; and it is the manner of their coming forth that gives the knowledge of the firft years of a horfe's age. Of thefe twelve, four are caUed nippers, four middling teeth, and four go by the name of corner teeth. The four nippers are feated on the fore -part of the mouth, two above, and two below. When a horfe iias put forth thefe, he is concluded to be from two and a half to three years old. The middling teeth are placed near the nippers or ga- therers, one above, and one below, on each fide of the jaws. They come out and appear between three and a half and four years. The corner teeth are placed ftill more forward in the mouth, one above, and one below, on each fide of the jaws. They begin to ftioot between the fourth and the fifth year, and are got above the gum at five years ; and when furmounting the gum at that age, they become hollow, and mark commonly till feven or eight years. By marking is meant, that in the hoDow or cavity of the corner teeth a little black fpeck is formed, which, from its refemblance, is called the h\iA or eye of a bean, or the mark. But when the horfe pafles fix, the cavity begins to fill, and the black mark difappears by degrees ; yet this diminution of the cavity and the mark continues from fix to feven and a half. However, at eight years, the cavity is filled up, and the black mark gone ; and the tooth is then full, and even as if it had been ftiaved. It is then faid, that the horfe has raized, which happens a little before the eighth year ; and after that, the horfe does not mark ; fo that the fureft knowledge of his age is then formed from his turtles. The turtles are placed beyond the corner teeth, upon the bars, two on each fide below, without being preceded by any foal teeth. The two under turtles cut fometimes at three years, fometimes at three and a half, fometimes at four; T E E four ; bill the two upper Hifhcs fomctimt-s at four, fomc- times at four and a half; fonietimes before and fometimes after the corner teeth, without any certain rule ; and till the age of fix they are chamfered within. And at about ten years of age the two under tuflies appear much worn, which ferves for that age. After that they grow out in length, and become bare of flefli, becaufe the gum flirinks and re- tires ; and at laft, about the iiftcentli or fixteenth year, the horfe JheUs. It is fometimes faid, that a horfe is not capable of any great fatigue till his tulhcs have cut the flcin. See AcK, in Horfemanjl.np. The teeth in flieep are divided into two kinds, the inciforcs and the molares, or the cutting and dividing, and the rub- bing and grinding teeth. Such flieep as are fuU-mouthed have eight of the firft fort of teeth ; throwing up two every year, conlequently lole their fucking teeth. The incifores are found to wear down in proportion to the adfion which they have ; but the molares, having more ftrength, and a different form, do not fuffer fo much in this way. It has been fuggeiled by an experienced flieep-farmer, that thefe forts of young animals moltly renew their firfl two teeth at from about fourteen to fixteen months of age ; and after that, every year nearly at the fame tiine, until they are turned three years old, or, in the technical language of the fheep-mafter, three fhear, when they become full- mouthed ; for although they have eight teeth before in the imder jaw, it is commonly believed that they only caft and renew the fix infide ones. Shepherds, however, differ much on this point, fome contending that they only fhed the fix fore-teeth, while others maintain that they caft the whole eight fore-teeth. The matter is, therefore, not yet well afcertained. Some properly remark, that iheep are very uncertain in their throwing up their teeth ; much depending upon their being early or late lambed, well or ill fed, and other fimilar circumftances. Tups have been known to have four broad or renewed teeth, when by the age, as (hewn in the above manner, they ought to have had only two. Some fheep are remarked to be more backward than others, by feveral months, in proportion to their ftrength of conftitu- tion, and other matters. In Romney Marrti the teeth of fheep are found to decay much fafter, it is believed, than in any other part of the coimtry. Clofe feeding wears the teeth exceedingly ; of courfe, the teeth of the fheep of thofe who ftock the hardeft commonly decay the fooneft. The fheep graziers m this dillrift are very particular in mouthing their ftieep, which are kept or rejefted according as their mouths are found to be good or bad ; as, where the latter is the cafe, they have great difficulty in maintaining themfelves during the winter feafon. It is noticed that fheep, about the tiine of renewing their teeth, are very tender in their mouths, and do not thrive fo well as they do at other feafons. At one feafon a teg, it is fuppofed, may ilarve any fheep by clofe feeding ; but on the renewal of its broad teeth, any (lieep may itarve it. In the above diftrift, the barrens or old breeding ewes are generally caft off" when they have had their third lamb ; though fometimes, if their mouths be good, and they are often better than thofe that have had only one lamb, they are kept for the fourth lamb : nor is this fuppofed a bad praflice, fince by it fome valuable ewes may be referved. Sheep are feldom kept here to any great age : fome fa- vourites are, however, kept till ten years old, without a tooth in their heads. Some have heard of their living twenty years. In the county of Hereford they are faid to live to a great age : they live on long grafs in the fummcr feafon, and T E F pcafc-ftraw and other fnnilar matters in the winter, which do not wear their teeth fo mucii as when they labour hard on a clofe fliort-fef turf. See Shkei'. The teeth of the various other forts of domeftic animals have hitherto been but little noticed or attended to by ftore or ftock mafters, though tiiey are probably, in many cafes, as much changed, and lervc to mark the ages and growths of the animals as much and as certainly, as in the inilanccs ami cafes which have been given above. • Teeth, Mammoth's. See MaMMOTh'j Teeth. Tf.eth, IVolf's. See Wolves' Teeth. Tkktii of a Wheel, in Mcchamcs. See WllEEL. TEETHING. See Dentition, and Difeafei of Teeth, fupra. TEETMOW, in Geography, a town of Bengal : 40 miles S.S.E. of Curruckpoiu-. TEFEE, a town of Brafil, in the government of Para, on the river of the Amazons ; 220 miles W. of Fort Rio Negro. TEFELSDORF, a town of Tranfylvania ; 7 mUes N. of Scheftiurg. TEFEN, a town of Afiatic Turkey, in Natolia ; 28 miles S.W. of Amafieh. TEFESSAD, or Tfessad, a town of Algiers, whofc ruins extend along the coaft of the Mediterranean near a league, fuppofed to have been the ancient Tipafa ; 32 miles S.S.W. of Algiers. N. lat. 36° 32'. E. long. 2° 54'. TEFETHNE, or Teftane, a town of Morocco, on the coaft ; 60 miles W. of Morocco. — Alfo, a river of Morocco, which runs into the fea near Mogodor. TEFFEREG, a town of the archbiffiopric of Salzburg ; I mile S. of Windifch Matray. TEFLIS, a town of Afia, capital of the principality of Georgia, and fee of a bifliop, founded, according to an old infcription in the citadel, by a certain prince Sarang, A.D. 1063, is fituated on the N.W. fide of the great plain of Kara- joes, at the foot of a hill, occupying both banks of the river Kur, over which is a bridge. This city is furrounded with ftrong walls, except towards the river ; and has a large fortrefs at the declivity of the mountain, which contains a garrifon, and is often made ufe of as a place of refuge for criminals and debtors. All the houfes are of ftonc, with flat roofs, which ferve, according to the cuftom of the Eaft, as walks for the women. The buildings are neat and clean ; but the ftreets are exceedingly dirty and narrow. The town contains one Roman Catholic, thirteen Greek, and feven Ar- menian churches. Near it are fome warm fprings, and hence it is called Theleftokar, or Warm town. In the year 13^6, this town was taken by Tamerlane, and the king of Geor- gia made prifoner. In 1723 it was taken by tlic Turks; and in 1734 retaken by Kouli Khan. Before it was taken by Aga Mahomed Khan, in 1 797, it contained 4000 houfes, and 22,000 inhabitants. Although mo.-t of the houfes, which are neatly built, are now ftanding, the population does not exceed 15,000 fouls. It was for many years the refidence of prince Herachus, and is at prefent tiiat of the Ruffian governor and commander-in-chief, who has at all times a large force ftatioiied in the city, to the difguft of the inhabitants, who iluidder at the thoughts of their wives and daughters being conftantly expofed to the view and impor- tunities of ftrangers. This circimiftance tends to render the Ruffian name detefted by the Georgians: 1 00 miles N.N.E. of Erivan. N. lat. 42^^ 45'. E. long. 45° 2o'. TEFTE RI) A R, the name of an officer of dignity in the Eaftern nations. In Egypt he is lord high trealurer of tlie tribute p;ud out of the lauds to the grand fignior. He is named for TEG for a year by the Porte, but is generally comimicd in his office many years. This oHice is romctimes given to one ot the poorer beys, to help him to fupport his dignity ; and fre- quently to a quiet one, who is not likely to enter into in- trigue;. For one party never cares that a Ihrring man of the oppofite party Ihould be invelted with an office of this dignity. See DKKTAnnAR. ■ TEFUT, in Gevgruphy, a town of Africa, in the country of Darah, formeriy the capital of the ancient kings of Darah, now gone to deciy. TEFZA, a town of Morocco, built by llie Arabians on the fide of a mountain : the funounding walls are com- pofed of blocks of marble ; 70 miles N.E. of Morocco. N. lat. ^i'4o'. TEFZRA, a town of Algiers; 15 miles S. of Tre- mecen. • TEG, a term ufed in fome parts of the kingdom by the farmers, to exprefs a lamb of a year old. Among fportfmen it denotes a roe of two years old. When a flock of ewes and lambs are turned into a turnip-iield, the young lambs of three weeks old will immediately fall to eating the turnips, and fcoop them very prettily ; but thefe tegs will not touch them for feveral days. They ufually ftay till almoft ilarved to death before they begin, but when they have begun, they foon grow fat. In the Romney Marfli fyftem of management, both the ewe and the wether tegs are kept upon the upland grafs farms during the winter feafon, by which advantages aie gained in various ways. They are by this means enabled to keep more ewes and fattening fheep on their marth-lands, and to have the tegs when the pallures require them. See Sheep. TEGADOO Bay, in Geography, a bay on the eaft coaft of themoft northern iflands of New Zealand, difcovered by captain, then lieutenant Cook, in 1769. S. lat. 38° 10'. W. long. 181° 14'. ■ TEGiEA, JiMMEL, in Ancient Geography, a town of Africa, mentioned by Hirtius, fituated S.W. of Leptis. TEGANAN, an illand of the Mediterranean, in the vicinity of that of Rhodes. TEGAPATAM.in Geography. See FoRT St. David. TEGAREE, a town of Bengal; 11 miles N. of l\.i(henagur. TEGAZA, a town of Africa, capital of a diftrift in Zenhaga ; near it is a falt-mine, about 300 miles from the Atlantic, and 4CX3 S. of Cape Non. N. lat. 22° 20'. TEGE, in Ancient Geography, a town of Africa Propria, between the two Syrtes. Ptol. TEGEA, a town in the S.E. part of Arcadia, at a fmall diftance from the Argolide ; and placed by M. D'An- ville on the fcite of the modern Mokha. In this place was a famous temple of Minerva Alea, in which was a ftatue of the goddefs, which was removed to Rome by Auguftus. This temple contained a number of other curiofities ; and the priefthood in it was exercifed by a young female under fifteen years of age. Near this temple was a ftadium, in which were celebrated games in honour of Minerva, and others in memory 'of a viftory gained over the Lacedaemonians. The public place was ornamented with ftatues, and particularly one of Mars Gynecothoene, (yt/mxoS&iB!,) fculptured upon a column. The epithet ferved to maintain the remembrance of a viftory obtained by the valour of the females of Tegea. At a fmall diftance from the public place was a magnificent theatre, encompaffed with bronze ftatues. This city fuffered much in the wars which raged in Arcadia in the time of the Achaean league. Paufanias fays that here was a temple of Venus Urania, near that which was dedicated to Ceres TEG and Proferpine. The Tegeates were a valiant people. Herodotus (1. i. c. 61.) mentions them with commendation. The Lacedarmonians ravaged the territory of Tegea, and at length obtained a fuperiority over its inhabitants. Tkgea, a town of the iile of Crete, faid to have been inhabited by Agamemnon. — Alfo, a town of Macedonia. TEGEHET, or Tegegilt, in Geography, a town of Africa; 120 miles S.S.W. of Fez. TEGEL, Eric, in Biography, a Swedifh hiilorian, and principal fecretary to Eric XIV. His father, having in- curred the juft refentment of Eric, as the caufe of the mif- fortunes that occurred during his reign, was apprehended by Charles, duke of Sudermania the brother of Eric, aad put to death at Stockholm in 1568. Charles, however, took the fon under his protetlion, and fent him to Germany for improvement ; and when he had vifited Spain and Poland, appointed him his fecretary. In 1614 he was nominated by Guftavus Adolphus hiftoriographer of the kingdom, and in 161 7 a privy-counfellor. He died at Stockholm in 1636, and left feveral works, of which the following were printed in Swedilh : viz. " The Hillory of Guftavus I. in two Parts." Stockholm, 1622, fol. " TheHiftory of Eric XIV. with Stiernman's Remarks ;" 16-172 1, 4to. TEGENUM, or Tegianum, in Ancient Geography, a town of Lucania. TEGERHY, or Teigarea, in Geography, a town of Africa, in the country of Fezzan ; 80 miles S.W. of Mour- zouk. It is a fmall town, and collefts from its lands little produce beCdcs 'flates and Indian coru. N. lat. 26° 17'. E. long. 15° 5'. TEGERN, a town of Bavaria, on a lake called the Tegcrn See, anciently Lacus Tigurinus. Here is a cele- brated abbey, founded by Albert and Ockar, two Bavarian princes; 28 miles S. S.E. of Munich. TEGESSUS, in Ancient Geography, a town of the ifland of Cyprus. TEGEWSE, in Geography, a town of Africa, near the lake of Marks, anciently c;dled Tichafa ; 38 miles S.S.W. of Gafsa. TEGHURI, a large river of Mingrelia, which rifcs be- tween the Alani and Soanni hills, and diferobogues into die Phafis, 10 verfts above the Schariftkali. TEGIANUM, in Ancient Geography, a town of Italy, in Campania, according to Gluvier ; though others affign it to Lucania, and call it Tegenum TEGIUM, a town of Afia Minor, in the Troade. TEGLA, in Geography. See TtGGALA. TEGLIO, a town of Italy, in the Valtehne, fituated upon the top of a mountain, is a long ftraggling place, con- taining about 300 houfes, about 9 miles from Tirano, and 12 from Sondrio. Cloie to the town arc the ruins of a fortrefs, ftanding upon an infulated rock, and formerly efteemed of great ftrength. This elevated fpot com- mands a rich and extenfive profpeft from Tirano to the lower part of the valley, beyond Sondrio, as far as Mor- begno. The government of Teglio is faid to contain the 12th part of the Valteline ; it is the moft populous diftrift, and contains about 8000 fouls. In a good feafon, it pro- duces much more corn than is fufKcient for the confumption of the inhabitants, and rivals Sondrio and Tirano in the goodnefs of its wine. TEGNA, in Ancient Geography, a town of Gaul, on the banks of the Rhone, not far from Valentia, to the north ; the modern Tein. TEGOM A, in Geography, a town of Africa, in the country of Afoudan ; 50 miles S. of Agades. N. lat. 19° 10'. E. long. 12° 20', TEGO- TEH T E 1 TEGORARIN, a town of Africa, in BiWulgerid ; 70 miles N.N.W. of Gardeiah. TEGUCO, a town of New Mexico, in the province of Culincan ; 40 miles N. of Culiacan. TEGUIXIN, in Zoology, a fpecies of li%ard ; which fee. TEGULA., in jlncitnt Geography, a town of Sardinia, on the route from Sulci to Nora. Anton. Itin. TEGULET, in Geography, a town of Abyflinia ; 180 miles S. of Gondar. N. lat. 9° 54'. E. long. 38° 35'. TEGUMENT. See Integument, TEGYRA, in Ancient Geography, a town of Greece, in Bcetica. TEHAE', in Geography, a town of Curdillan ; 30 miles E. of Amadieh. TEHAMA, a fandy belt which encompafles the penin- fulaof Arabia, beginning at Suez, and terminating at the mouth of the Euphrates. It is of various breadth ; for the mod part about two days' journey from the fea-fhore to the rife of the hills ; or at leaft this is the breadth of the plain adjacent to the Red fea. It bears every mark of having been anciently a part of the bed of the fea. Its bottom foil is agre'yifh clay, with a large proportion of fand, and having marine exuvix interfperfed to a great diftance from the fea- ihore. It contains large ftrata of fait, which in fome places rife up to hills. Its regular inclination towards the fea indi- cates that it has emerged gradually. The fmall eminences on the confines of this plain are compofed of calcareous itones, with a blackifh appearance, as if they had been burnt by the fun. The adjoining hills contain fchiftus and bafaltes. The fea, it is thought, ftill continues to recede, and the Tehama on that fide is gradually extending its limits. Hif- tory confirms thefe appearances of the gradual receffion of the waters ; and mentions, as fea-ports, feveral places which are at prefent inland, without noticing the prcfent maritime towns, which muft have been of later origin than the formation of the land on which they ftand. Thefe newly- formed lands, however, are barren and unfruitful. TEHRAUN, one of the five large diftrifts of the pro- vince of Irak, in the Perfian empire : the other four being Ifpahan, Naen, MuUayer, and Kermanfhaw. Tehraun is alfo the name of the prefent capital of Perfia, which is rendered in- terefting by the furrounding fcenery. To the S. are the exten- five ruins of the grand and once proud city of Rae ; to the E. the mountains of Elburz( famed in the Perfian traditions as the abode of dsemons) ; to the N. the fnow-clad fummit of the lofty Dumavend ; and to the W. a plain enriched with cul- tivation and villages, and forming a delightful contraft with the rugged and ftupendous rocks which (kirt it on the N. and S. Tehraun is about four miles in circumference, fur- rounded by a ftrong wall, flanked by innumerable towers, and a noble dry ditch, with a glacis between it and the wall. The only building of confequence within the city is the citadel, which contains the palace of the fovereign and his officers. It was founded by Kurim Khan, enlarged by the late king, and beautified by the prefent fovereign. The forti- fications can be conlidercd as formidable only in a country where the military art is unknown. The population is va- riable, being in fummer about 10,000, and in winter not lefs than 60,000 people. The environs of Tehraun are not unpleafant ; the plain, to the E. and W., being covered with villages, and abounding in grain. On the N. fide the king has completed a palace, which, from its fituation, and the fine gardens that furround it, is a moft delightful refi- de!\ce. There are many reafons which have probably in- duced the late king to fix upotj Tehraun as the capital of his dominions. Its centrical fituation, and the eafy defence Vol. XXXV. which it affords to the Perfian empire ; the fertiKty and pro- dudivenefs of the furroundijig country ; the number of wandering tribes tluit have fettled round it, and th.at may be eafily and foon affembled ; and above all, perhaps, its pro- pinquity to Ailrabad, the native city of Aga Mahomed Khan, and alfo to Mazandemn and Daluftan, countries pof- fclfcd by the Kajer tribe, of which ho was the chief, and on whofe power and affeftion to his pcrfon his authority wa$ in a great meafure founded ;— all thefe confiderations might have induced him to make this city the capital of the em- pire. N. lat. 35° 40'. E. long. 50° 52'. TEHROOT, o.r ZKiiEftooT, a town of Perfia, in the province of Kerman, furrounded by numerous gardens ; 8 miles N.W. by W. from Subzillan, and about 52 miles from the ruins of Bumm. TEHUACAN, or Teguacan, a pleafant town of New Spain, between Oaxaca and Orizava. It is fituated in a delight- ful vale, near a river of the fame name, called alfo Rio Grande, of a nitrous quality, and fo petrifying a nature, that the Ihorcs referable ruinous walls. It has four churches ; and the ftreets, fquares, and houfes are neat and modern. The chief market is that of wheat, which is excellent, and the pomegranates are highly efteemed. Befides numerous fami- lies of Spaniards and Mulattoes, here are about 2080 In- dians. In the vicinity of this town are two wheat-harvefts, one in May, the other in September. TEHUELS, a large lake of South America, towards the S. of Chili. TEHUKHA, a town of Thibet; 4 miles S. oT Jhanfu Jeung. TEICHOPCEUS, Tii^oTOiof, among the Athenians, an officer who had the care of the city walls ; their number wa« the fame with that of the tribes, every tribe having the choice of one. TEIGN, in Geography, dLTivtroi England, in the county of Devon, which runs into the Englilh Channel at T*ign- month. TEIGNMOUTH, a market-town in the hundred of Exminfter, and county of Devon, England, is fituated, at its name imports, at the mouth of the river Teign, and if flieltcred on the eaft and north-eaft by a chain of hills, near the foot of which it ftands. It is diftant from Exeter i z miles S. by E., and from London 187 W.S.W. A fmall rivulet divides the town into two parts or parifhes, called Weft and Eaft Teignmouth. The town is recorded to have bee« burnt in the tenth century by the Danes, who, having landed here, and defeated the king's lieutenant, ravaged the country to a confiderable extent. It was alfo nearly eon- fumed in the reign of queen Anne, when the French landed and fet fire to it : one of the new ftreets, erefted with the money procured by a brief for the diftreffed inhabitants, was named French-ftreet, as a memorial of the calamity. Siiice that period the tow]-, has become of much greater im- portance, and is now one of the moft falhionable watering- places in the wcftern part of England. The principal re- fort of company is Eaft Teignmouth, where the public rooms and theatre are fituated : the former, a neat building, contains tea, coffee, aflcmhly, and billiard-rooms ; the theatre has been recently built on a fpot of ground given by lord Courtenay, and was firft opened in the fummer of 1802. A walk or promenade leads from the public rooms towards the fouth, over an cxtrnfivc flat called the Dan, on which is a fmall fort creftrd for the defence of the town. The viaw hence, up the river, is extremely beautifid ; the rrourd gradually rifing on each fide into vcrdar.t hiilf, well culti- vated, and adorned with woods. The cli.Ts overhangi.'ig the fea have a fingular appearance, being, with the exception of D d a few T E I a fevr broad patches of verdure, of a deep red cplour, and mount in rude irregular fhapes to the height of feventy or eiehty feet. Nc-ar the centre of Weft 1 e.gnmouth is the church, a very ancient ttune fabric, buih in the form of a crofs : the roof is fupported in a fingular manner by the ramifications of a wooden pillar, that was formed from the trunk of a fmgle tree. Eaft Teignmouth church is a vene- rable pile near the beach, and, from the appearance ot its architeaure, was probably one of the earheft ftrudures crefted after the coming of tlie Normans. The trade ot Teignmouth confills chiefly of commercial intercourfe with Newfoundland ; the exportation of clay, and the importation of co:d ; and is carried on principally ui craft built at the place, where are conveniences for launching vei- fels of a hundred tons. The clay exported is brought from Bovcy, for tiie moft part by a canal ; and dug on the eftate of James Templar, efq., who, with true patriotifm, is em- ployed indefatigably in promoting the folid interefts of his country, by improving agriculture, and encouraging manu- faftures. Weft; Teignmouth had anciently a chartered mar- ket, held on Sundays ; but this was difcontinued by order of the (heriff in the reign of Henry III. The market is now held on Saturdays. Salmon, trout, whiting, mac- karel, and various other kinds of filh, are taken here ; and by fome excellent local regulations, the inhabitants have the privilege of fupplying themfelves before any can be fold to the dealers. The lord of the manor holds a court -baron, or court -leet, in the town once every year : at which court a jury is nominated, two confl;ables deputed and fworn, and a portreve chofen, who is inverted with confiderable authority. In the population return of the year 1811, Weft Teign- mouth was ftated to contain 441 houfes ; Eaft: Teignmouth, 188; the inhabitants of the former being 2080; of the latter 813 : making an aggregate of 2893 perfons, occupy- ing 629 houfes. Nearly oppofite Teignmouth, and almoft under the pro- montory called the Nefs, is the hamlet of Shaldon, the pro- perty of lord Clifford, which has lately become a favourite fummer refidence for many families who vifit the watering places on this coaft. The chapel, erefted about the year 1670, ftands in a beautiful fituation, a little above the Teign, about three quarters of a mile from the hamlet, and is approached by a level walk (haded with luxuriant trees. — Beauties of England and Wales, vol. iv. Devonfliire. By J. Britton and E. W. Brayley, 1803. Warner's Walk through the Weftern Counties, 1 800. TEIJEUT, a town of Morocco ; 15 miles S.E. of Mo- godor. TEIL, a river of France, which runs into the Atlantic, N. lat. 47= 39'. W. long. 3° 8'. Teil, Le, a town of France, in the department of the Ardeche, on the Rhone ; 1 2 miles S. of Privas. — Alfo, a town of France, in the department of the Ille and Vilaine ; 15 miles S.E. of Rennes. TEILLEUL, Le, a town of France, in the depart- ment of the Channel ; 6 miles S. of Mortain. TEIN, a town of Bohemia, in the circle of Pilfen ; 6 miles N.E. of Tachau. Tein, or Teyn, a town of Bohemia, in the circle of Bechin ; 4 miles S. of Bechin. TEINITZ, a town of Bohemia, in the circle of Pilfen ; 26 miles S.W. of Pilfen. N. lat. 49° 30'. -E. long. 12'' ^7'. — Alfo, a tovrn of Moravia, in the circle of Brunn ; 27 miles S.S.E. of Brunn. Teinitz Jungfern, a town of Bohemia, in the circle of Schlan ; 8 milts W. of Sc'ilan. TEINTS, and Semi-Teints, in Painting, denote the fe- 1 T E I veral colours ufed in a pifture, confidered as more or lefs high, or bright, or deep, or thin, or weakened, and dimi- nilhcd, &c. to give the proper relievo, or foftnefs, or dif- tance, to the feveral objefts. See Colouring. The word is pure French, where it fignifies the fame. TEIRCE, or Teirs. See TlEKCE. TEISBACH, in Geography, a town of Bavaria, on the Ifer ; i mile W. of Dingelfingen. TEISENDOPvF, a town of the archbifhopric of Salz- burg ; 1 2 miles W.N. W. of Salzburg. TEISKO, a town of Sweden, in Tavaftland ; 45 miles N.N.W. of Tavafthus. TEISSIER, Anthony, in Biography, a voluminous French writer, was born at Montpellier in the year 1632. Having ftudied Greek and philofophy at Orange, and being deftined for the miniftry among the Calvinifts, he applied to Hebrew and theology at Nifmes ; and after fpending fome time in the academy at Montauban, he removed to that of Saumur. From thence he went to Paris, where lie cul- tivated an acquaintance with feveral learned men ; but giving up his defigns for the miniftry, on account of a dif- order under which he laboured, he turned his thoughts to jurifprudence, and took the degree of LL.D. at Bruges. In 1683 he married ; but upon the revocation of the edift of Nantes, he was obliged to quit France. He then retired with his wife to Switzerland, and was recommended by Turretin and Heidegger to the family of Efcher, a burgo- mafter of Zurich. Declining to accept advantageous offers if he returned to France, he engaged with the fenators of Berne for two years in condufting a French gazette in tliat city. In 1 69 1 he quitted Berne aijd went to Zurich ; and from thence he proceeded to Brandenburgh, where refugees enjoyed common privileges with thofe of the natives of the country. At Berlin, the eledlor appointed him hiftoriogra- pher, with an annual penfion of 300 crowns, which was fuc- ceflively augmented. He was alfo honoured with the title of counfellor of legation, and ordered by the elettor to tranf- late into French the life of his father, Frederic WilHam, written in Latin by Puffendorf. For this fervice he was liberally rewarded, though his tranflation was never printed. He was afterwards employed in compofing many works for the inftruflion of the prince royal ; and though his confti- tution was delicate, he enjoyed good health till his death, which happened in 1715, in the eighty -fourth year of his age. It would exceed our limits to enumerate all his works ; an ample account of them may be found in the General Biography. TEI-TCHANG, in Geography, a town of Corea ; 13 miles N.N.E. of Haimen. TEITEI, in Ornithology, the name of a Brafilian bird, a fpecies of tanagra, in the Linnxan fyftera, called alfo gui- ranheemegeta, and guraundi. It is of the fize of our red-breaft, and beautifully co- loured. It fings very fweetly, and is kept in cages, five or fix to- gether in the fame cage. Marcgrave's Hift. of Brafil. TEITH, in Geography, a river of Scotland, formed by ftreams from feveral lakes, in the county of Perth, which runs into the Forth, two miles above Stirhng. TEJUCO, the capital of the Diamond diftria in Brafil, fituated in a ravine at the foot of a mountain. Tejuco is feparated by the fmall rivulet of St. Francifco from the op- pofite mountains. The greateft of the diamond works, called Mandanga, is fituated on the river Izgitanhanha, and employs about 1000 negroes, fometimes double this number. This rich river, formed by the junaion of feveral ftreams, is as wide as the Thames at Windfor, and in general from three to T E 1 T E L to nine feet deep. The part now working is a curve or elbow, from which the current is divvrtcd into a canal cut acrofs the tongue of land round wliich it winds ; the river being flopped below the licad of the canal by an embankment formed of feverat thoufand bags of fand. The deeper parts of the channel of tlie river are laid dry by large caiflbns, or chain-pumps, worked by a water-wheel. The mud is then carried off, and the cafcalhao is dug up and removed to a con- venient place for wafhing by machinery adapted to tliis pur- pofe. The contrivance for obtaining th- diamonds from tlie cafcaliiao is particularly defcribed by Mr. Mawe, ubi infra. Tejuco is fituated in a fterile diftrift, which produces no- thing for the maintenance of its inhabitants, whofe number IS about 6000 ; and therefore depends for a fupply of provi- fions, on farms fituated at the diftance of feveral leagues. Neverthelefs, Tejuco may be called flourifliing, on account of the circulation of property created by the diamond-works in its vicinity. The annual fum paid by government for the hire of negroes, falaries of officerB, and various neceffaries, ■fuch as nitre and iron, does not amount to lefs than 35,000/. and this, added to the demands of the inhabitants of the town and its neighbourhood, occafions a confiderable trade. The (hops are Itocked with Englifh cottons, baizes, and cloths, and other manufaftured goods ; alfo hams, cheefe, butter, porter, and other articles of confumption, which are brought on mules from Bahia and Rio de Janeiro. Te- juco, from its fituation on the fide of a hill, is very irregu- larly built ; its ftreets are uneven, but the houfes in general are well conftrudled, and in good condition, compared with thofe of other towns in the interior. Its name, fig- nifying in the Portuguefe language a muddy place, is de- rived from places of that defcription near it, which are ren- dered pafTable by being covered with large pieces of wood. The diamonds are locked in the treafury under three locks ; and thofe found in tlie diftrift are depofited every month, as they are received from the works ; they are carefully weighed, and fome of them felefted and kept feparate. The average quantity obtained may be eftimated at from 20,000 to 25,000 carats annually, which are fent under a military cfcort to Rio, and there lodged in the treafury. The diamonds are tied up in black filk bags, and depofited in elegant inner ca- binets, all which are locked up in ftrong chefts, bound with iron. Tejuco affords fome good barley, but grafs for cattle is fcarce and dear. Moll parts of the country abound in oranges, pines, peaches, guavas, and a great variety of in- digenous fruits : ginger and pepper grow fpontaneoufly, and many fpices might probably be cultivated with fuccefs. Mawe's Travels in the Interior of Brazil, 1812. TEJUGUACU, in Zoology, the name of a fpecies of lizard, common in the Brazils, and called alfo temapara. It much refembles the iguana in its general figure, but differs from it in that its whole body is black, only variegated with fome white fpots. It lives principally on tlie fucking of eggs, but it is capable of bearing hunger a long time ; Marcgrave having kept one alive feven months without eat- ing. This fpecies afforded alfo a certain tellimony to that author of the reprodudlion of the tail when cut off. Ray. TEIUM, in Ancient Geography, a town of ACa Minor, fituated on the Euxine fea, on the frontiers of Paphlago- nia, near the fmall river BiUis, 370 ftadia from the town of Heraclea. It was a Greek Ionian colony, which derived its name and its origin from Ths, a Milefian prieil, according to Arrian and Mela. The wcrfhip of Jupiter named Patarus was praftifcd in this town, according to Demofthenes. On the E. the territory of this town was bounded by the river Parthenius. The town was much augmented when the em- pire of the Perfians was deftroyed. TEIUNHANA,inZ/3fl%^, thenameofafmall American lizard. It is about tlie thickncfs of one's little fir.ger, and ha» a (harp nofe. Its tail is very (lender, fix fingers breadtli long, and terminates in a point almoft as fharp as a needle. It* head is covered with fcales ; and its back, fides, and legs, with a tender flvin, as foft as fatin to the touch ; and its tail is covered with extremely minute fcales, of a fqoare figure Ray. TEKAT, in Geography, a town of Afiatic Turkey, in Natolia ; 10 miles N. of Kiangari. TEKEBI, a town of Egypt; 22 miles W.S.W. of Damietta, TEKEH, a town of Turkilh Armenia ; 40 miles S.E. of Trebifond. TEKEREE, a town of Hindooftan, in Candeifli ; 14 miles E. of Barrawnay. TEKIN, a town of Afiatic Turkey, in Caramania ; 100 miles W. of Tocat. TE-KING, a city of China, of tlie fecond rank, in Quang-tong, near the river Si ; 1064 ™'" S.S.W. of Peking. N. lat. 23° 12'. E. long. 111° Alfo, a city of China, of the fecond rank, in Quang-tong ; 1065 miles S. of Peking. N. lat. 23° 12'. E. long. 1 10° 50'. TEKKIUR DAG, a mountain of European Turkey, in Romania; 32 miles S.S.E. of Adrianople. TEKLA, a town of Bohemia, in the circle of Chrudim ; 6 miles S.W. of Leutmifchl. TEKMABAD, a town of Perfia, in the province of Scgeilan ; 70 miles E.N.E. of Boll. TEKOA, a village, and anciently a city of Paleftinc, built by Rehoboam, king of Judah, and confiderable ruins appear of its ancient grandeur. It was the native place of the prophet Amos ; 9 miles S. of Bethlehem. TEKOLY, a town of Hindooflan, in Bahar ; 53 mile* S.S.W. of Patna. TEKUPH^, or Thekupii.t., in the Je-wijh Chronology, are the times in which the fun proceeds from one cardinal point to the next. The fame term is alfo apphed to the moment in which the fun enters a cardinal point : thefe four terms, or tckuphat, into which the Jews divided their folar year, are obfervcd among the Jews with a great deal of ceremony ; the rcafon, as we ai-c informed by Munfler, is this : That people have a notion, that in each tekupha the fun has a feparate angel appointed to guard and direct it ; and that in the very point where the fun finifhcs one tekupha, and enters upon another, before the one direftor has taken place of the other, the devils have a power to exercife all kinds of tyranny in the water. And hence, they fancy, that if any body drinks the fmalleft quantity of water at that time, he will infallibly have a dropfy, or fome other grievous dillemper. The tekupha of Tifri correfponded to the autumnal equi- nox, that of Tebeth to the winter folilice, that of Nifan to tlie vernal equinox, and that of Tamuz to the fummer folilice TEKY Sound, in Geography, a road on the coaft of Georgia, fouth of the Savannah river, where a large fleet may anchor in ten or fourteen fathoms, and have lafe en- trance over the bar of the river ; the flood tide generally feven feet. TEL Aremas, a town of Afiatic Turkey, on the Eu- phrates ; 5 miles W.N.Wof Diarbekir. Tel Gi%ir, a town of Afiatic Turkey, in the province of Diarbekir ; 16 miles W. of Merdin. Tel K'laran, a town of Afiatic Turkey ; 30 miles S.S.W. of Diarbekir. D d 2 Tel T E L Tel Miifcl, a town of Afiatic Turkey, in the govern- ment o{ Diarbekir ; 33 miles N.W. of Mo*ul. Tel tlJuduh, a town of Egvpt, where the Jews had for- merly a temple, deftroyed by Vefpafian ; 17 miles N.L. ot CtATO. r o • \ TELA, in Ancient Geography, a town of Spam, on the route from A'fturica to Saragoita, between Intercatia and Pintia. Anton. Itin. Tela, or ConJIantia, a place of Afia, m Mefopotamia, near the mountains, about N. lat. 37° 25'. Tela Cellulofa, in Anatomy, the Cellular Subjiance ; which fee. It is fometimes alfo called tela mucofa. TELACH, in Geography, an ifland of RulTin, in the Penzinrtvoi fea. N. lat. 61^ 35'. E. long. 159° 14'. TELAMON, in Ancient Geography, a promontory of Italy, in Etruria, at the foot of which was a port, between the rivers Almina and Alma. (Anton. Itin.) Pliny calls this port Telamon. TELAMONE, in Geography, a town of the Stato del Prefidii, on the coaft ; 10 miles N. of Orbitello. N. lat. 42° 38'. E. long. 11° 6'. TELAMONES, a name given by the Romans to what the Greeks called At/antes ; -viz. the figures of men fup- porting entablatures, and other projeftures. See Atlas. The woi-d, according to fome, is derived from the Greek TiXxfiut, from TEXau, or -r'Ao-u;, I bear. AmoBg the Greeks they were called atlantes, otTXavxi;, which comes from the fame word, Ta^«w, or tA«i', by the figure metathefis. Telamones is alfo ufed by furgical writers fometimes for lint, and fometimes for the fillets or bandages which they apply over their dreflings. TEL ANA, in AncunS Ge-ography, a very ancient town of Afia, in Affyria. Steph. Byz. fays that the king made it the place of his refidence before Nineveh was built. TELANADING Islands, in Geography, three fmall idands lying eaft and weft, near the N.W. coaft of the ijland of Gilolo. N. lat. 2° 18'. E. long. 127° 30'. TELANDRIA, in Ancient Geography, an ifland on the coaft of Lycia, in Afia Minor. Pliny. TELANDRUS, a town of Afia Minor, in Lycia. Pliny. TELAPSAR, in Geography, a town of Afiatic Tur- key, in the province of Diarbekir ; 20 miles W. of Mtoful. TELARUSE, a river of Afia, which forms the north boundary of the kingdom of Queda, feparating it from Lower Siam, and runs into the Eaft Indian fea, N. lat. 6° 55'. E. long. 99° 42'. TELAUGIA, in Natural Hifiory, the name of a genus of fcrupi, of a glittering appearance, ufually containing flakes of talc, and emulatine the ftrufture of the granites. Hill. Of this genus we have twelve fpeciet. TELCHINE3, in Ancient Geography, a people who de- rived their origin from the ifle of Crete. They eftablifhed themfelves in Cyprus, and in Rhodes, where it is faid they in- vented the ufe of iron and brafs. TELCOOTE, in Geography, a town of Hindooftan, in Orifla ; 20 miles S.E. of Jaypour. TELDOM HoTUN, a town of Chinefe Tartary, on the weft fide of the river Saghalien ; 745 miles N.E. of Peking. N. lat. 49° 56'. E. long. 127'=' 33'. TELE, TtAx, among the Athenians, thofe revenues that were brought in by lands, mines, woods, and other public pofleflions, fet apart for the ufe of the commonwealth ; as TEL alfo tributes paid by fojourners and freed-fer^-ants, and ti"" cuftoms laid upon cettain trades and goods. TELEBA, in Ancient Geography, a town of Albania, be- tween the mouth of Soana and that of Garrus. Ptol. TELEBOAS, a river of Afia, in the environs of the fources of the Tigris ; furrounded, as Xenophon fays, by a great number of villages. TELEGRAPH, a machine adapted for communicating intelligence at a confiderable diftance, by making various fignals, which have been previoufly agreed upon between twc parties, to reprefent letters, words, or ideas. The means of making fignals that are ufed in naval and military oper- ations, :u-e not called telegraphs, although they effeft in a great degree the fame objeft. See Signal. The word telegraph, which is derived from two Greek words, tuXf, at a diftance, andy^o^f, to lurite, was brought into ufe about 1 793 or 1 794, when the French direftory eftablilhed machines of this kind for communicating intelligence betweeFi Paris and all the principal towns in France. The Britifin government foon after adopted the fame meafure, and it has ' fince become very general. No machine for making fignals can with propriety be called a telegraph, unlefs it is adapted to exprefs a fufficient number of Tetters or words to form a complete language, and which can therefore be made to communicate any inform- ation which can be exprefTed by oral or written language, Lefs perfeA fyftems of fignals, which extend only fo far as to communicate intelligence of events which have been forefeen, and the appropriate fignals previoufly arranged, are ftill called fignal flags, fignal lanthorns, fignal guns, or fires, &c. When people wifh to tranfmit intelligence to others at a diftance, in a quicker manner than by Tetters fent by mef- fengers or carrier-pigeons, it can be done only by fignals, Thefe may be employed in three diff^erent ways : either by fingle fignals, which, according to previous agreement, con- vey whole ideas ; or by feveral fuccefiive fignals, which, by reprefenting letters and words, anfwer the fame purpofe ; or otherwife, by employing fignals which exprefs numbers, each perfon being provided with a diftionary in which every word has a number affixed to it. The firft kind of fignals were employed in the earlieft periods, and fome of them were fuited to the ear as well as to the eye. For the making of vifible fignals, the ancients employ- ed fire and fmoke, torches, flags, &c. ; and in modern times, flcy-rockets have been ufed. For the audible fignals, they employed drums and trumpets ; and fince the invention of gunpowder, the firing of cannon has been applied to the bke ufe. But all thefe methods are incapable of expreffing- what could be communicated by fpeech and writing ; and the means of exprelfing all the poffible variations and com- binations of the letters of the alphabet, form, in a proper fcnfe, the true telegraphic art. Even the fignals commonly ufed at fea, as they extend only to particular circumftances, are, when compared to fignals by letters, only a kind of hieroglyphics. Thepropofed objeft of the telegraphic art is, therefore, to obtain a figurative language, the charafters of whicli may be diltinguifhed at a diftance. On the firft refieftion, we find that the prafticable modes of fuch diftant communications muft be confined to found and vifion ; each of which is in a great degree fubjeft to the ftate of the atmofphere ; for independent of the wind's direftion, it is known that the air is fometimes fo far deprived of its elafticity, or fome other quality that in- fluences the conveyance of founds, that the heaviefl ordnance can fcarcely be heard farther than the fhot flies. It is alfo well known, that in thick hazy weather, the largeft and moft TELEGRAPH. moft defined objafts become totaUy obfcured at a (hort diilance. No inib-ument, therefore, defigned for the purpofe can be perfeft. We can only endeavour to diminith thefe irremediable defefts as much as may be. The moft barbarous nations employed fignals, which could quickly inform them of the approach of enemies, as appears by the teftimony of feveral ancient authors ; and there is reafon to believe that fome fort of telegraphic com- munication was in ufe among the Greeks. The deftruc- tion of Troy was certainly known in Greece very foon after it took place, and before any perfon could have returned from it. A Greek play begins with a fcene, in which a watchman defcends from the top of a tower in Greece, and gives information that Troy is taken. " I have been look- ing out thefe ten years (fays he) to fee when that would happen, and this night it has been done." In addition to the Stenterophonic tube which was known and ufed by Alexander the Great, the Romans had a method, in their walled cities, either of forming a hollow in the mafonry, or of applying tubes to the walls, fo as to confine or augment found, and convey information to any part of their works. In lofty hoafes and warehoufes, it is now a common cuftom to have a pipe, by way of fpeaking trumpet, to give orders from the upper apartments to the lower. Bv tliis mode of confining its volume, found may be carried to a very confiderable diftance ; but beyond a certain extent the found will lofe all articulation, and only convey alarm, with- out giving direflions. Every city of the ancients had its watch-towers ; and the caftra ftativa of the Romans had always fome fpot, elevated either by nature or art, from whence fignals were given to the troops cantoned or foraging in the neighbourhood : but it appears that they had not arrived to any greater refine- ments in the telegiaphic art, than that on feeing a certain fignal they were immediately to repair to their appointed rtations. Flags or enfigns, with their various devices, .ire of the earlieft invention, efpecially at fea, where, from the firft idea, which was raoft probably that of a vane, to fliew the direction of the wind, they have been long adopted as the diftinguifliing marks of nations, and are now fo perfefted into a fyftem of fignals, that evexy requifite order and queftion is received and anfwered by the moft diftant (hips of a fleet. The mode of fignalling in ufc about half a century ago was very imperfeft. It was a good deal amended and fim- plified by that lamented officer admiral Kempenfelt ; and his fyftem, as it was called, continued in ufe till within thefe twenty-five years. It was fuperfeded in the navy by fir Home Popham's, who firft brought into praftical utility a plan originally, it is believed, fuggefted . by Mr. Richard Gower, of the Eaft India Company's fervice, in his " Prac- tical Seamanfhip," pubhfhed in 1794. This was the fubfti- tution of ten or twelve numbered flags, for a great number of flags. It is furprifing that this eafy fcheme fhould not fooner have been difcovered and adopted. Inftead ot the immenfe " colour cheft" that we and our naval cotempora- ries can recolleft, and the difficulty of finding and hoifting the variety of flags required, it is pleafing to witnefs the facility with which communications can be now made, by means almofl; as eafy of application as the pen. The fyjl em now in ufe, originating, as we have ftated, with an officer of the Eaft India Company's fervice, has recently been greatly improved by another of thefe officers. It is not eafy to deicribe the nature of thofe improvements ; nor proper, perhaps, were it otherwife ; for the direftors of the Eaft India Company have deemed it expedient to keep them fecret. The author of them is captain Thomas Lynn. His work was printed in 1 8 14, at the Company's ex'pence, in a confiderable quarto volume, under the title of •' Lynn's Improved Syftcm of Telegraphic Communication." It is adopted throughout the extenfive fervice of the Eaft India Company ; and we are glad to fee it noticed in the preface to the volume, that the highly refpcflable court of dircftorc moft hbcrally patronized the work and its author. Wc do not find, notwithftanding the manifeft advantage of the " Improved Syftem," that it has yet been introduced into the royal navy ; although every officer in tliat as well as the Eaft India C jmpany's fervice, who have had opportunities of ti-ying it, are loud in its praifc. It adapts itfelf to every detcription of telegraphic machinery now in ufc ; or, as fur as we can fee, that can be ufed : it requires fewer flags tlian were heretofore neccfl^ary ; and its powers are vaftly greater than the other codes or fyftems. This paragraph, and perhaps this whole page of our dictionary, can be thus com- municated, word for word, or phrafe by phrafe, without dil- ficulty, and with a rapidity unattainable by any fcheme hitlierto publifhed. The numbers, and powers, and meaning of the fignals, may be changed at plcafure : fo that if the work, fall into improper hands, it merely communicates the principle on which the fyftem is founded. In applying tliis or a fimilar mode of communicating in- teUigence in land fervice, feveral objeftions prefent ihem- felves : the variety of communications neceffary to be made is fo much greater, that the combination would become too comphcated ; and if the perfon for whom the information is intended, ftiould be in the direftion of the wind, the flag would then prefent a ftraight line only, and at a little diftance would be fcarcely vifible. The Romans were fo well aware of this inconvenience of flags, that many of their ftandards were folid, and the name manipulus denotes the rudeft of their enfigns, which was a trufs of hay fixed on a pole. A beacon or bonfire, made of the firft inflammable ma- terials that offeredj being the moft obvious, is perhaps the moft ancient mode of general alarm. By being previoufly concerted, the number of points where the fires appeared may have paiticular intelligence affixed. The fame ob- fervations may be referred to the more modern plan of tlirow- ing up rockets, whofe number, or the places from whence they are thrown, may have affixed fignifications. Many of our hills ftill retain the name of beacon hills, from the fignals which ufed to be made upon them, by means of fire and fmoke, which were the chief things employed during the dark ages, and in the times of the feudal fyftem. The fire was ufed by night, and the fmoke by day. Within a few years, fignals made by thefe means were very common amongft the fmugglers on our coaft. The machine of .£neas, who wrote a trcatifc on the duties of a general in the time of Ariftotle, is defcribed by Polybius to have confifted of two earthen veffels, made cxaAly fimilar in all their dimenfions : they were to be filled with water, and each was to have a cock or fpout, which could be opened or ftut at pleafure, and would, when open, difcharge an equal quantity of water from both veflels, fo that each of thcveifels would take precifely the fame period of time to difcharge the whole, or any given proportion, of its contents. A float of cork was to be provided for each veffel to reft upon the fur- face of the water, andfupport a perpendicular ftem or index, which could be divided, and have certain fentenccs written to correfpond with each divifion. The apertures of the fpouts of the two veffels were to be previoufly adjuftcd, and the veffels filled with water to the fame height, fo that their floats and indices would correfpond in pointing out the fame fentences : then, if both cocks were opened at the fame in- ftant, the water would run out from each vcffel, and the floats of both would fubfide together, fo that when either index flood TELEGRAPH. flood at a particular fentence, the other index would, at the fame time, point out the fame fentence. Now this operation could be equally well performed when the two veffels were moved to any dillance afunder, provided the obfervers were within fight of each other, to be able to make the requifite fignals for opening and (hutting the cocks of both veffels at the fame moment. The author thus defcribes the ufe of this inftrument : The two veffels being prepared and adjulled, they muff be carried to the two places where the fignals are to made and obferved ; water is poured into each, and the floats and indices are put into the veffels. When any of the events which are written upon the indices (hall happen, a torch or light is raifed, which muft be held aloft till fuch time as ano- ther is raifed by the party to whom it is direfted. (This firft Cgnal is only to give notice that both parties are ready and attentive.) Then the torch or other light muil be taken away, and the cocks fet open inllantly by both parties. When the interval ordivifion on that part of the index where the event, of wliich notice is to be given or written, (hall be fallen to a level vpith the veffels, then the man who gives the fignals lifts up his torch, and on the other fide, the corre- fpondent fignal maker immediately fhuts the cock of his veffel, and looks at what is written on that part of the (lick which touches the mouth of the veffel ; on which occafion, if every tiling has been executed exaftly and equally on both fides, both parties will read the fame thing. The proper telegraphic art was not wholly unknown to the ancients. The Greeks and the Romans made ufe of pots filled with lighted twigs and ftraw for fignals, over which they poured oil ; and thefe being placed in certain rows, ex- preffed certain letters, according to the order in which each row was lighted. Polybius defcribes a new method of communication, which was invented by Cleoxenus, or by Democlitus, and vi'hich Polybius himfelf very much improved. It poffeffes the prin- cipal advantage of the modern telegraph, -via. that, by means of fignals, it communicates the letters of the alphabet, and can therefore be ufed to exprefs any thing which can be required. It is only inferior to the telegraph in the means of making the fignals, which is by the light of torches, and rather complicated, fo that it would be te- dious to tranfmit any thing more than fhort fentences. Polybius defcribes this method, which he calls Pyrfia, in the following manner : Take the letters of the Greek alphabet, and divide them into five parts, each oi which will confift of five letters, except the laft divilion, in which there will be only four. Let thefe be fixed on aboard, in five columns. The man who is to give the fignals is then to begin by holding up two torches, which he is to keep aloft till the other party has alfo fiiewn two : this is only to denote that both fides are ready : thefe torches are then withdrawn. Both parties are pro- vided with boards, on which the letters are difpofed as for- merly defcribed. Then the perfon who gives the fignal is to hold up torches on the left hand, to point out to the Other party, from what column he (hall take the letters as they are pointed out to him : thus, if the letter is to be from the firft column, he holds up one torch ; if from the fecond, two ; and fo on for the others. He is then to hold torches on the right hand, to denote the particular letter of the column that is to be taken. All this muft have been agreed on before- hand. The man who gives the fignals muft have an inftru- ment (JiQTT^o., perfpehive), confifting of two tubes, and fo placed, that by looking thnVUgh one of them he can fee only the right fide, and looking through the other, he can only fee the left-hand fide of him who is to anfwer. The board muft be fet up near this inftrument ; and the ftations on tlie right and left muft each be furrounded with a wall ten feet broad, and about the height of a man, that the torches raifed abote it may give a clear and ftrbng light, and that when taken down they may be completely concealed. The ftegaiiographia trithemiana of a Benedidline monk, in the fifteenth century, feems to have been fomething of the fame kind ; but the firft recorded experiment, after the man- ner of the Greeks, is defcribed by Kircher, in his " An magna Lucis et Umbrae," under the title of Cryptogamia catoplrlca ; it was however imperfeft, and could be em- ployed only at a certain diftance. Schott, in his " Technics curiofa," propofes, after an anonymous author, to ereft pofts upon an eminence, fo as to be diftinguiflied through a tele- fcope, and on which proper fignals could be elevated, as might be neceffary. The marquis of Worcefter, who is fojuftly celebrated for having firft dilcovered that the force of fteam could be applied to mechanical purpofes, brought telegraphic com- munication to a confiderable degree of perfeftion, if at leaft we give him credit for having really effefted every thing which he mentions in his Century of Inventions. This little tra& was pubhlhed in 1663, and contains the following articles. " No. 6. How at a window, as far as eye can difcover black from white, a man may hold dii'courfe with his corre- fpondent, without noife made, or notice taken, being accord- ing to occafion given and means afforded, ex re natd, and no need of provifion before-hand, though much better if forefeen, and means prepared for it, and a premeditated courfe taken by mutual confent of parties. " No. 7. A way to do it by night, as wejl as by day, though as dark as pitch is black." The marquis gives us no idea of the means which he ufed for exhibiting his fignals, by which we can judge of the prac- ticability of his plan for communicating any detailed intel- hgence. Kefsler, in his Concealed Arts, advifes charafters to be cut out in the bottom of a caflc, fo as to appear luminous when a light is placed withinfide, and the charafters muft be changed fucceffively to exprefs words and fentences. Dr. Hookers Telegraph. — The firft idea of a telegraph upon a fimilar conftruftion to thofe ufed at prefent, was fuggefted by Dr. Hooke towards the end of the laft century, the fiege of Vienna by the Turks having turned his attention to the bufinefs. He gave the firft complete defcription of fuch a machine, as appears by the following extraft, from a paper of his, read before the Royal Society on the zift of May, 1684. " I propofed (fays he) fome years fince, a method of difcourfing at a diftance, not by found but by fight : I fay that it is poffible to convey intelligence from any one high and eminent place, to any other that is in fight of it, though thirty or forty miles dirtant, in as ftiort a time almoft as a man can write what he would have fent ; and as fuddenly to receive an anfwer, as he that receives it has a mind to re- turn it, or can write it down on paper. Nay, by the help of three, four, or more eminent places vifible to each other, lying in a ftraight line, 'tis poffible to convey intelligence almoft in a moment, to tvs'ice, or thrice, or more times that diftance, with as great a certainty as by writing. " For the performance of this, we muft be beholden to a late invention, which we do not find any of the ancients knew ; that is, the eye muft be aflifted with telefcopes, that whatever charadljrs are expof^d at one ftation, may be made plain and diftinguifhable at the other. " Firft : For dij ftations, if they be far diftant, it will be neceffary that they fliould be high, and lie expofed to the flcy ; that there be no higher hill or part of the earth be- yond them, that may hinder the diftinftnefs of the charac- ters, TELEGRAPH. ters, which are to appear dark againft the (ky, beyond thfm appearing white, by which means ;iiio the vapours near the ground will be pafled over and avoided. Next, in clioofing thefe ftations, care muft be taken, as near as may be, that there be no hill that interpofes between them, that is almotl high enough to touch the vifible ray, becaufe in fnch cafes the refraftion of the air of that hill will be very apt to dif- turb the clear appearance of the objctl. The (lations being found convenient, the next thing to be confidered is, what telefcopcs will be neceflary for each ftation. One of thefe telefcopes muft be fixed at each extreme ftation, and two of them in each ' intermediate ftation ; fo that a man for each glafs, fitting and looking through them, may plainly dif- cover what is done in the next adjoining ftation, and with his pen write down on a paper the charafters there expofed, in their due order ; fo that there ought to be two perfons at each extreme ftation, and three at each intermediate one, that intelligence may be conveyed backwards and forwards at the fame time. Next there muft be certain times agreed on, when the correfpondents are to expeft it ; or elfe there muft be fet at the top of a pole, in the morning, the hour ap- pointed by either of the correfpondents for afting that day. " Next there muft be convenient apparatus of charafters, confifting of at leaft as many diftinft charafters as there are secefTary letters in the alphabet, (to be made ufe of as is ex- prefled in Plate Telegraph, fg. I.) And thefe muft be either day charafters or night charafters. If they are to be made ufe of in the day-time, they may all be made of deals, and of a fize convenient for the feveral diftances, any one of which charafters may fignify any one letter of the alphabet, and the whole alphabet maybe varied io,ooo ways, fo that none but the two extreme correfpondents fhall be able to dif- cover the information conveyed. If the charafters are for the night, then they may be made with links, or lights dif- pofed in a certain order, which may be covered or un- covered, according to the method agreed on. There will be alfo requifite feveral other charafters, which may for expe- dition exprefs a whole fentence, fuch as ' I am ready to communicate ;' ' I am ready to obferve.' I could inftance a hundred ways of facilitating the method of performing the defign with the more dexterity and quickncfs, and with little change, but that I think will, be needlefs at prefcnt, fince, whenfoever fuch a way of correfpondence . ftiall be put in praftice, thofe and many more than I can think of at pre- fent will of themfelves occur, fo that I do not in tlie leaft doubt but that with a little praftice dl things may be made fo convenient, that the fame charafter may be feen at Paris, within a minute after it hath been expofed in London ; and that the charafters may be expofed fo quick after one ano- ther, that a compofer ftiall not much exceed the expofer in fwiftnefs, and this not only at the diftance of one ftation, but of an hundred ; for fuppofing all things ready at all of thofe feveral ftations for obferving and expofing as fail as the fecond obferver doth read the charafters of the firft expofer, the fecond expofer will difplay them to the obferver of the third ftation, whofe expofer will likewife difplay them for the fourth obferver, as faft as his obferver doth name them to him or write them down. There may be many objeftions brought againft this way of communication, becaufe it has not yet been put in praftice, but hardly any that may not be eafily anfwered and obviated." Dr. Hooke illuftrates his invention thus : Let ABC (^jig. 2.) reprefent three very long mafts or poles erefted, E the top piece that joins them together, D a fcrecn, behind which all the deal-board charafters hang upon certain rods or line8, and may, by the help of fniall lines connefted with each of them, be expofed at 1"', or drawn back at D, at occafion may require. This propofal of our ingenious countryman it very com- plete and well ftndied ; it would be Icfs convenient and expe- ditious than the modern telegraphs, but would certamly have anfwered very ufifiil purpolee, with the advantage of being very free from the uncertainties and errors of more complete machines, which, at the fame time that they admit of mak- ing a greater variety of figns than the letters of the alphabet, are for the fame reafon more liable to miftakes in exhibiting as well as in reading or tranflating them. The only obvious improvement on Dr. Hooke's telegraph is, that, inilcad of concealing the charafters behind the fcreen D, they (hould be kept down below in the houfe on which the machine is to be erefted, and be hoifted up into tlie frame when they are to be exhibited. M. Amontons, an ingenious French academician who ftu. died mechanics, was born at Paris in 1663, and died in 1 705, at the age of forty-two. He propofed the following method : Let there be people placed in l^L'veral ftations, and at fuch a diftance from each other, that by the help of a telcfcope, a man at one ftation may fee a fignal made in the next before him : he muft immediately repeat the fame fignal, that it may be feen by perfons in tlie ftation next after him, who are to communicate it to thofe in the following ftation, and fo on. Thefe fignals may be as letters of tlie alphabet, or as a cipher, underftood only by the two perfons who are in, the diftant places, and not by tliofe who make the fignals. The perfon in the fecond ftation making the fignal to the perfon in the third the very moment he fees it in the firft, the news may be carried to the greateft diftance in as little time as is neceftary to make the fignals in the firft ftation. The diftance of the feveral ftations, which muft be as few as poftible, is meafured by the reach of a telefcope. M. Amontons is faid to have tried this method on a fmall traft of land, before feveral perfons of the highefl rank at the court of France ; but we are not acquainted with the kind of apparatus he employed ; all that we know of his method is precifely the fame as Dr. Hooke's. Guyat, a long time after Dr. Hooke, propofed tables, with letters cut out in them : and Paiihan, in his Diftionnaire de Phyfique, defcribes a tranfparent figure, confilling of one perpendicular and three Iiorizontal ftripes, forming ten compartments, each of which can be rendered vifible or in- vifible at pleafure, by blinds or ftiutters moveable from behind. Mr. Richard LovcU Edgeworth, in a memoir which he prefented to the Royal Society of Ireland (fee their Tranf- aftions, vol. vi. p. 125.), adduces proof, that in 1767 he tried an experiment of tlie prafticabllity of communicating intel- ligence by a fwift and unfufpefted mode ; and for this pur- pofe he employed a common windmill, and arranged a fyf- tem of fignals, which could be made by the different pofitions of the arms of its fails, the canvas being removed fr^i" °n*' or more arms, as was required. Thefe fignals were made to denote numbers, and both parties were provided with voca- bularies, in which all the words were numbered. French Telegraph Akhough the telegraph was thm fully explained in 1684, it does not appear that this valuable invention was at all praftifed or applied to any ufcful pur- pofe until 1793 or 1794, \\hen the events of the French re- volution had direfted all the energies of that ingenious people to the improvement of the art of war. A report made by Barrere to the fitting of the French Convention in Auguft 1794, attributes the invention of the telegrapli which they ufed to citizen Chappe. " The new invented telegraphic language of fignals is an artful TELEGRAPH. ariful contrivance, to tranfmit thaughts m a peculiar lan- auaee from one diftance to another, by means of machines, which arc placed at different dillanccs of from twelve to fifteen miles afunder, fo that the expreffion reaches a very diftaiu place in the fpace of a few minutes. This is now brought to fuch a (late of perfeftion, that a correfpondence may be conduded with Liflc, upon every fubjeft and every thing : even proper names can be cxpreffed ; an anfwer may be received ; and the correfpondence thus be renewed feveral times a day. The only thing which can interrupt their cffeft is the weather, when the air is fo very bad and turbid that the objcifts and fignals cannot be diftinguidied. By this invention, remotenefs and diftance almoft difappear, and all the communications of correfpondence are effefted with the rapidity of the twinkhng of an eye. By its aid the opera- tions of government can be very much facilitated, and the unity of the republic confolidated much more by the fpeedy communications with all its parts. " The greateft advantage can be derived from this mode of correfpondence, becaufe, if thought proper, its objects need only be made known to certain individuals, or to one indi- vidual alone, or to the extremities of any diftance ; fo that the Committee of Public Welfare may at prefent carry on a correfpondence with the reprefentative of the people at Lifle, without any other perfons being acquainted with their ob- jefts. If Lifle was even befieged, we fhould know every thing at Paris that might happen in that place, and could fend thither the decrees of the Convention without the enemy being apprifed of it, or able to prevent it." M. Chappe's or^he French telegraph is reprefented in^^. 4, which ii made from fome fketches taken from the telegraph »n the palace of the Louvre, at the time of its firft eftablifti- ment, and publifticd in the Monthly Magazine, and other publications. A B is a beam or ftrong maft of wood, erefted perpen- dicularly from the centre of a cabin or fmall houfe fituated on a rifing ground: it muft be about 15 or 16 feet high above the top of the houfe. C D is a balance-beam, jointed to the top of the maft, fo as to be moveable on its centre, like a fcale-beam. This balance-beam, which is called the long indicator, may be placed vertically or horizontally, or any how inclined, by means of ftrong cords, which are at- tached to the central wheel or pulley D , which has two grooves in the edge to receive the cords. The long indicator is about 1 1 or 12 feet long, and 9 inches in breadth ; and at each extremity it carries fecondary indicators F, G, which like- wife turn upon centres or joints, by means of four cords, which are condufted through a hollow in the centre pin or axis of motion of the long indicator, otherwife the motion of the long indicator to put it into different pofitions, would derange the cords, and alter the direftion of the fecondary indicators, which are capable of being placed in any pofition with refpeft to the long indicator, by thofe cords being con- di;fted by puUies down into the cabin, and there attached to Other mechanifm, by means of which the whole machine is moved, and can be made to affume any of the pofitions re- prefented by the fmall figures in the plate, in which pofi- tions it forms a variety of different charafters, to denote the letters of the alphabet or numerals. That the indicators may be very light, and at the fame time oppofe the leaft refiftance to the wind, they are formed by frames, the interior parts of which are filled up by fmall oblique and feparate boards, which however, being feen in front, appear contiguous. The ends of the fmall indicators are carried beyond the centres, and carty counter -weights to balance the weight of the indicators ; but thefe ends and balances are made fo as to be invifible at a diftance. It is eafy to find the number of fignals polTible to be made with this telegraph : for if we confider the great indi- cator as being fixed, we (hall find that each of the fmaller ones may diftinftly take five different pofitions : two where it makes a right angle wiih the great indicator ; two where it makes an angle of 45° ; and one where it falls back upon the great one, in which cafe it will difappear. Three other diftinft pofitions might alfo be created ; one where the fmall indicator would be Horizontal with the great one, and two where it would make an angle of 135° with it. The leffer indicators then, confidered as fingle movers, will furniffi five times five, or twenty-five fignals. As the great indicator is alfo a mover, there are twenty-five times as many fignals as this indicator has diftinft pofitions ; and as it has but four diftinft pofitions, one horizontal, one ver- tical, and two inclined, there are in all four times twenty-five, or one hundred fignals. The manner of ufing the telegraph was as follows : At the firft ftation, which was on the roof of the principal pavilion of the Louvre at Paris, M. Chappe, the inventor, received in writing, from the Committee of Public Welfare, the words to be fent to Lifle, near which the French army was at that time ftationed. Each of the telegraphs in the line employed three perfons to work it : one to move the machine, which was done by a fingle motion of a winch, and could there- fore be effefted in a moment. A fecond perfon was em- ployed with a telefcope to obferve the telegraphs of the two adjacent ftations, to receive the communications, and to know- by their fignals, if they had underftood the communication made to them, and alfo to receive the anfwers. The third perfon was employed to write down the obfervations made by the fecond perfon, and to give orders to the firft. The ftations were about three or four leagues diftant, and an obfervatory was fituated near the Committee of Public Safety at Belleville, to obferve the laft telegraph. The grammarian will eafily conceive that iixteen figns may amply l"upply all the letters of the alphabet ; fince fome letters may be omitted, not only without detriment, but with advantage. Thefe figns, as they were arbitrary, could be changed every week : fo that the fign for B one day, might be the fign for M the next ; and it was only neceffary that the perfons at the extremities ffiould know the key. The intei^- mediate operators were only inftrufted generally in imitating and repeating thefe fixteen fignals, which were fo diftinft, and fo marked, as diff^erent the one from the other, that they were eafily remembered. The conftruftion of the machinery within the houfe was fuch, that each fignal was uniformly given in precifely the fame manner at all times. It did not depend on the operators' manual fliill, becaufe the pofition of the arms could never for any one fignal be a degree higher or a degree lower than was intended, their movements being- regulated mechanically. M. Chappe, having received at the Louvre the fentence to be conveyed, gave a known fignal to the fecond ftation, which was Montmartre, to prepai-e : at each ftation the obfervers with telefcopcs were on watch, and each telegraph immediately gave the fignal of preparation which he had received ; and this being communicated fuccef- fively through all the line, all the machines were brought into a ftate of readinefs. The perfons at Montmartre then received, letter by letter, the fente/ice from the Louvre, which they repeated with their own machine, and this was again repeated from the next height, with inconceivable ra- pidity, to the final ftation at Line, where the obfervations were written down, and tranflated according to the key which had been before arranged to be ufed, either by pre- vious concert, or by fome particular ^ignal made with the telegraph, to denote that ksy which was ufed. The time taken TELEGRAPH. taken up for each movement was about twenty feconds ; of whicli the motion alone took up four feconds ; and during tlie other fixteen, the telegraph was kept ftationary, that it might be diftinClly oblerved and written down by the people at the next ftation. The figns were fometimes made for words, and fometimes for letters: when in words, a fmall flag was hoilled ; and as the alphabet could be changed at plcafure, it was only the correfponding perfons at each end of the line wlio knew the meaning of the figns. In general, news was gi\-en every day about eleven or twelve o'clock ; but the obfervers were conftantly on the watch, and as foon as a cer- tain fignal was given and anfwered, they begun from one end to the other to move their machines. All the moveable paits wefe painted of a dark-brown colour, to be more dif- tinftly vifible when viewed againft the bright &y. Another line of telegraphs, from Paris to Landau, was completed in 1796: the firll of them was erefted on a pavihon of the palace of the Tuilleries. The conftruftion was more comphcated than the firil. A fixed black bar, fifty feet long, was fupported horizontally by four uprights. This bar carried five indicators, fimilar to the fmaller indi- cators of the machines before defcribed. Two of the up- right pofts which fupported the horizontal bar, carried each a fimilar indicator : in this way the centres of the indicators were all ftationary, inftead of having the long indicator with fmaller ones at the extremities. Thefe feven indicators were moved by puUies, in the ufual way ; and there was none of the difficulty of conveying the communicating cords through the hollow axis of the central pulley. Each of the indicators could take feven diftinft pofitions ; -uiz. for thofe which were fupported by the horizontal bar,- two vertical, four inclined, and one horizontal ; and for thofe indicators which were fupported by the upright pofts, one vertical pofition, four inclined, and two horizontal ones. The number of combinations which fuch a conftruftion can make, is 7x7x7x7x7x7x7, which gives the ailonifhing number of 823,543 fignals. This number, which is eight thoufand times larger than that of the fignals of the firft telegraph, is doubtlefs more than fufficient : it, however, allowed them to abridge confiderably the telegraphic lan- guage, and to tranfmit whole phrafes at a time. The Engl'tjli Telegraph. — M. Chappe's machine was known in England not long after it was fet up, and two working models were made at Frankfort, and fent to England, by which the plan and alphabet became known ; and its advantages were fo obvious, that the Britilh government tried various experiments on telegraphic communication, and at length lines were efta- bli(3ied from the Admiralty -ofiice to Deal, Portfmouth, and other points of the fea-coaft. Thefe machines are upon the conftruftion reprefentcd v\ fig- 3, not being made with indi- cators, like the French, to move upon centres into different pofitio;is, but with fix oftagon boards, each poifed upon an horizontal axis, and fupported in a frame in fuch a manner, that each can be placed vertically, and will then appear of the full fize ; or if they are placed edgeways, as fliewn at d, the naiTOw edge alone will be prefented, and this at a fmall diftance will be invifible. The boards are turned by means of cranks, r, upon the end of the axles, and from thefe, lines defcend into the cabin below, where each has a handle, which is confpicuoufly marked with the letter or charadler which will be indicated when the handle is drawn down. By the changes in the pofition of thefe fix boards, thirty- fix changes may be eafily exhibited, and the fignal to repre- fent any letter may be made. By certain pofitions, a variety of other things may be fignified, according to the will of the two perfons employed at the two extreme pofts in jiiaking the fignals. Thus, one board being in a horizontal Vol. XXXV. pofition, and the others fhut, or in a perpendicular fituation,- may denote the letter a ; two boards only being in a hori- zontal pofition may give tiie letter h ; ilirec in the fame manner, llie letter c, and fo on. As theve may be made as many changes with thefe boards as with the fame number of bells, the letters of the alphabet may be made with eafr, and a fufficient number of fignals may be formed for extra- dinary purpofes. This number of changes is fufficient ; for as this telegrapli is intended to convey information by reprefenting the fuc- cefTive letters of each word, a greater number of changes, than would cxprefs all the effential letters of the alphabet," the numerals, and three or four more lignals, to fignify at- tention, repeat, period, error, &c. would be only em- barralfing, and liable to error. It is a good fyftem to fpell every word, rather than attempt to communicate entire word» or fentences, as by keeping always to one fyftem, mif- takes are avoided. The communication is in itfclf fo rapid, that it is more important to attain certainty in the operation, than to make any facrifice for the fake of difpatch. This telegraph was judicioufly contrived to have a fufTi- cient number of combinations, without having more tlian necefTary. Five boards would have been infiifhcient, and feven more than were necefTary. But there are feveral ferious objeftions to it : the form renders it too bulky to admit of being raifed to any great height above a build- ing ; and after all, the boards are lefs evident to the eye at a diftance than the indicators of the French machine. The ftations muft, therefore, be nearer together, to ren- der the bars of the frame vifible as well as the boards. Neither can this telegraph be made to change its diredion, but it can only be feen from one particular point. It was found necefTary to have two telegraphs at the Admuralty, one for each line, and alfo at any point of the line where it branched off. To enable the telegraph to be ufed at night, the flrll French telegraph which was fet up was furnilhed with Argand lamps, but the Englifli was never ufed in that man- ner. It would have required a great number of lamps ; becaufe it would have been necefliiry to have fixed lamps to indicate the points of the frame in which the boards work, as well as the boards themfelves. Thefe two forms of telegraph, the French and the Eng- lifh, continued in ufe for fome years. The French made frequent changes in the details of their fyftem, though for a long time they preferved M. Chappe's machine ; and when Buonaparte alTumed the fupreme command in France, the original machines were taken down. A number of machines were fet up on various parts of the French coaft, and were ufed in fome of their campaigns : they were of a very temporary nature, and compofed of the fimpleft materials, of marts and yards, with large balls at the end ; the yards were in- clined by cords, fo as to cffetl the fignals on the fame prin- ciple as M. Chappe's original machine. About 1806 a new fe't of telegraphs was cftabhfhcd on the whole extent of the coaft of the French empire, of which the following de- fcription is given by captain C. W. Pafley, in the Philo- fophical Magazine. Sce^^j. 5 and 6, Modern French Telegraph. — Every telegraph confifts of an upright poll, R, to which are attached three arms, A, B, and C, exaftly fimilar to each other, and each mov- ing upon its own diftinft fpindle or axis. The axis of one of thefe arms. A, is near the head of tlie poft R ; and the dif- tance between the centres of motion of either of ihc two uppermoft arms, and the centre of the one immediately be- low it, is rather lefs than double the length of one arm. The higheft of the thiec arms, A, can e.'thibit ftvcn dif- E e tinft TELEGRAPH. tina pofitions, as is fticwn by the dotted lines A i, As, A 3, &c. ; but the other two arms, B and C, can only ex- hibit fix pofitions each, becaufe they are hidden by the poft when in a vertical pofition. The total number of combina- tions, or of dillina fipials, which can be made by this tele- graph, will conftaiitly'be three hundred and ninety-one ; but a« the arm A, when in the vertical pofition A 4, may appear to be part of the poft, R, it is not fafe to employ that pofition, and this will reduce the number of fignals to three hundred and forty-two. As only three bodies are employed in this telegraph, it appears very fuperior to the Ad- miralty telegiaphs ufed in England, which, by the combina- tion of double that number of bodies, can only make fixty- three diftind fignals. Captain Pailey obferves, that the mechanifm of the French telegraphs jull defcribcd, muft be either imperfeft, or the men employed in working them muft have been very unlkilful, for the fignals were made and repeated in an awkward manner, with what feemed to him much unneceffary lofs of time. But thefe defefts, it will be evident, detrad nothing from its merit as an invention. In regard to the mechanical conftruftion, he could only ob- ferve that the arms, which were painted black, and appeared folid at a diftanee, were made in the fafliion of a Venetian blind, in order, it may be prefumed, to diminifh the aftion of the wind in bad weather. Each arm had a counterpoife of thin materials painted white, which, unlefs the obferver be very near the telegraph, becomes invillble. Fig. 5. fhcws the telegraph in a Hate of reft, the dotted Knes marking the feveral pofitions in which the arms can be exhibited. Fig. 6. is a fpecimen of the telegraph at work. Fig. 7. (hews the conltruftion of one of the arms on a larger fcale, D E being the part which is fafliioned like a Venetian blind, and E F the counterpoife. Sir Home Popham's Telegraph at the yidmiralty. — The original telegraphs at the Adrniralty, with the fix boards, have been lately taken down, and a new kind fubilituted. It is on the fame principle with the French, being an upright maft with two indicators, which move upon centres one above the other, in the manner of the laft defcribed. The maft is made to turn round on its vertical axis, fo as to pre- fent its arms fucceffively to all quarters, when required. The mechanifm, which is the invention of fir Home Pop- ham, is the bcft which has ever been contrived, the move- ments being very fimple, and efi^efted by iron fpindles and endlefs Icrews, fo that the indices below are certain to ac- company the indicators exaftly in their movements, and place them precifely in their required pofitions, which cannot be done by the old machinery with cords, becaufe they are liable to expand and contraft by wet or dry weather. The machinery for this fet of telegraphs was conftrufted in the moft fubftantial manner by Mr. Maudflay in 1 8 16. (See ^^j. 8, 9, and 10. ) L M is a tall maft of an hexagonal form, framed up from fix fir planks put together at the angles, and bound by iron hoops at different places, fo as to be hollow within. The lower end, L, terminates in a pivot, and the maft is retained in a vertical pofition by a circular collar at O, which embraces it, and is fupported in the roof of the building. The two arms, P M and Q R, are move- able upon centres, one at the top of the maft and the other half way down. When the arms are placed in a vertical pofition, they fhut up within the hollow of the maft, fo as to be entirely concealed ; and for this purpofe, two of the fix fides are cut away at the upper part, fo as to leave an opening through the maft of fufiicient width to admit the two arms to work in it. To communicate motion to the arms, a fmall toothed wheel is fixed upon each arm at the centre of motion, and clofe to the fide of the arm. The 10 teeth of thefe wheels aie aftuated by endlefs fcrews or worms, formed on the upper ends of the long fpindl'\s d eanA fg, which defcend down to the bottom of the hollow maft, and have fmall bevelled wheels upon them, which are aftuated by wheels of fimilar fize, fixed on the ends of ftiort horizontal fpindles, which have handles, p, q, applied at the extremities. ( See Jig. II.) By turning thefe handles, motion is given to the vertical fpindles d andy"; and by means of the endlefs fcrews upon the upper ends of them, the wheels at M and R, on the centres of the arms, are turned round, and the arms are put into any required pofition. But in order that the people below may at all times know exactly what pofitions the arms ftand in, two dials, m and r, are formed on the lower part of the maft, the upper one, m, being for the upper arm M, and the other, /-, for the lower arm R ; and each dial has an index or Iiand, which turns round with a motion ex- aftly correfpoiiding to the motion of the arms. For pro- ducing this motion, the axle of each hand or index has a fmall toothed wheel, ,f or /, (Jig. 1 1 .) fixed upon it in the middle ; and an endlefs fcrew is formed upon the upright fpindle to work in the teeth of the wheel. The wheels upon the centre of the arms, and thofe upon the axes of the indices, have the fame number of teeth ; and as every turn of the fpindles and fcrews will move the wheels round one tooth, the angular motion of the arms, P M and Q R, and the hands, m and r, will in all caies be the fame. The dials are each divided into eight, correfponding with the eight pofitions in which the arms are to be exhibited : viz. pointing vertically ; ift, upwards ; and 2d, downwards : pointing horizontally ; 3d, to the right ; and 4th, to tlie left : pointing upwards at an inclination of 45 degrees ; 5th, to the right ; and 6th, to the left : pointing downwards at an inclination of 45 degrees ; 7th, to the right ; and 8th, to the left. But of thefe eight pofitions, only the four laft are made ufe of to reprefent characters ; becaufe, in the two vertical pofitions, the pointers enter within the maft, and cannot therefore be feen whether they are pointing up- wards or downwards : the horizontal pofitions of the arms are referved for -the neceflary fignals of preparation, &c. Each arm, then, has four pofitions, in which it will exprefs different fignals ; and thefe pofitions are all made with the pointer, at an inclination of 45 degrees from the horizontal line. Thefe fignals either exprefs the letters of the alphabet, or the numeral charafters, according to previous arrange- ment, which muft be made known by exhibiting a prepara- tory fignal, before the commimication is begun. The fignal to prepare for receiving letters is the lower arm extended horizontally to the right ; and for the nimierals, both armt are extended horizontally to the left. The upper pointer, P M, ufed by itfelf, at an elevation of 45 degrees, denotes, A, or I, when pointing upwards to the left. B, or 2, when pointing downwards to the left. C, or 3, when pointing upwards to the right. D, or 4, when pointing downwards to the right. The lower pointer, Q R, ufed by itfelf, at an elevation of 45 degrees, denotes, E, or 5, when pointing upwards to the left. F, or 6, when pointing downwards to the left. G, or 7, when pointing upwards to the right. H, or 8, when pointing downwards to the right. It is eafy to conceivej that, by repeating all thefe pofi- tions with both arms exhibited together, inftead of one fingly, various com.biuations inay be made, which are fuf- ficient TELEGRAPH. ficient to exprefs all the remaining letters, and fome otlier neceflary iignals. The dial for each arm is double ; that is, a dial is fixed at each fide of the mail, and the axles of the indices or hands proceed quite through the mall, fo as to have a hand at each end. Thefe dials are not numbered cxaftly fimilar to each other, but are reverfed ; and the two indices on tlie oppofite ends of the fame axle, though tliey point in one diredlion, do not indicate the fame numbers on the two dials ; becaufe each dial is adapted to indicate the meaning which the different pofitions of the arms will have, when the tele- graph is viewed on that fide to whicli the dial faces. For when a fignal is made, tliat arm vvhicli projcfts from the right-hand iide, if the telegraph is examined on one fide, will projeft on the left hand, when the telegraph is viewed on the other fide. It was before flated, that the telegraph can be turned round, fo as to prefent its arms to any direftion. This is done by the pivot, L, at the lower hand ; but to hold it fad in the defired dii'edtion, a circular iron plate is placed on the floor, with holes in it ; and a bolt, W, is fitted into two eyes, which are fixed to the axle of the mail. The point of this bolt drops into any of the holes in the plate, and thus holds the mall firm ; but if the bolt is lifted up, to draw its point out of the holes, it can be turned round. The arms are made with boards, like Venetian blinds ; and each has a piece of calt-iron at the oppofite end, to coimterpoife the weight, and make the arm move freely into all pofitions. Since the telegraph has been brought into aftual ufe, its great utility has been obvious ; and many ingenious perfons have ftudied the means of fimplifying the methods of repre- ienting the fignals, with a view to obtain the greater facihty and rapidity of communication. This would enable us to avoid the danger of miftakes, by being able to repeat the whole communication feveral times, which at prefent is tedious. Many of thefe contrivances difplay great in- genuity ; but it appears to us, that the defeA or difficulty 'of communicating detailed intelligence by means of tele- graphs, arifes from the complicated conflruftion of all the languages at prefent in ufe, rather than from any defedls in the machines, which have been propofed to exhibit the fymbols ; and that to perfeft telegraphic communication, it would be neceffary to invent a new and more perfetl lan- guage, which would be a moil valuable acquifition, to faci- litate all other modes of communicating ideas. All languages originated in a very rude ftate of fociety, and were at firft limited to the exprefiTion of very fimple ideas. As men advanced in civilization, they found the ne- ceflity of increafing the number of their words ; and to enable them to exprefs more complex ideas, compound words were occafionally introduced ; but, in all cafes, knowledge mull have made a confiderable advance, before any arrangement or claffification of words was imagined : becaufe the necefiity of any grammar would not be dif- covered, until the number of words were fo multiplied, as to render the ufe of them troublefome, and hable to con- fufion. Before a fyftem of grammar was eftablifiied, no improvements could be made in a language, except by the addition of new words ; and every fuch addition mud have introduced new difficulties in the ufe of the language. Even when a fyftem of grammar is completely eftablifhed, as is now the cafe in all the languages of civilized nations, the number of words which were invented, or introduced without any fyftem, is fo confiderable, as to prevent that perfedlion of expreffion which might be obtained, if the language had been wholly conftrufted in an advanced ftage of fociety. There is no doubt but a new language might be contrived, which, with .i very fmall number of words, compared with any of the known languages, might exprefj all ideas in a much more expeditious and definite manner than they do. In oral communication, this defeftive con- ftruclion of language, and the want of precifion, is little experienced, unlefs by thofe who begin to learn a foreign language ; becaufe the extreme rapidity of expreffion en- ables us to amplify and enlarge upon any fubjeft, fo as to elucidate any words or phrafes which are not direftly ap- plicable to the expreffion of an idea to be communicated, or which are at all indefinite. In writing or reading, the de- ficiency of language is more obfervable, from the greater difficulty of expreffion and communication. But when we attempt to converfe by fignals, we experience in its full force the great complexity of language, and find tliat it becomes a tedious operation to rcprefent a fcntencc clearly by fignals, which is fpoken or written in a moment ; and this muft continue to be tlie cafe, even if the mechanical operation of exhibiting the fignals is reduced to the utmoft poifible fimi>hcity. As no fucli fcientific language as that wiiich we hint at has been perfefted, we muft content our- felves to find the beil means of communicating our ideas by fignals, which ftiall indicate the letters and words of our prefent languages : and this may be done in two ways ; firft, by charadlers or fignals, which fliall either exprefs the letters of the alphabet, or words, or, in fome cafes, com- plete fentences. Tiie other method is to exhibit fignals, which fliall indicate numbers ; and thefe numbers can be tranflated into words, by means of a diftionary in which every word is numbered. The telegraphs which we have defcribed are of the former clafs, and we have explained the manner of ufing them ; but the latter kind requires a greater variety of fignals, becaufe they muft be capable of making as many fignals as there are words in the language in which the communication is intended to be made. There is fome difficulty in making a telegraph fo univerfal as this requires, otherwife the numeral method has decided advantages, in the convenience witli which it can be carried on by means of a common diftionary, alphabetically arranged, and in which every word is regularly numbered from one end to the other. In this any word can be inftantly found, by its place in the alphabet ; and the number correfponding to it being exhibited by the telegraph, and obferved by the op- pofite party, he can as quickly find out the fame word in the diftionary by means of its number. The numeral method is perliaps the eafieft of all others, and may be exhibited by fire and fmoke in the fimpleft manner, without any telegraph or compUcated apparatus being made for the purpofe. The meaning of a fignal is afcertained by the continuance or difappearance of fire and fmoke at a different place. In the day-time, the fmoke on a particular iiill may give notice to an obferver on the next liill, tliat a communication is to be made : he of courfe will anfwer it by fmoke, to ftiew that he is upon his watch. The fmoke will then difappear on both hills, by a cover being placed over the fire ; which, being taken off and put on again repeatedly, will fhew a fucceffion of clouds of fmoke rifing at proper inter>als in the air. The obferver notes the number of times that the fmoke rifes without a confiderable interval, fuppofe three times; and he then writes down the number 3. After a more confiderable intcrvid, determined on by the parties, the fmoke rifes again, we will fnppofe four times ; he writes down the number 4. He lias now the number 34 to com- municate by fignals to the next poft. At night this is done by a fucceffive appearance and difappearance of fire. As the number denoted by the fucccffive appearance of Ee 2 fmoke TELEGRAPH. fmokc or fire, or firing of guns, may, if it i3 a large number, be liable to miftake, a learned profeffor in Germany propofed to (horten the numbers employed, by ufmg a quaternary inftead of the decenary arithmetic. Thus, according to his fyftem, the units were to be placed as in common arithmetic ; a figure in the next place, to the left hand, inftead of denot- ing the number of tens, was a niHltiple of 4, denoted by the figure, that is, it denoted the number of fours to be exprefTed ; in the third place, the figure denoted the number of fixteens inftead of hundreds ; and the fourth place of figures would be fixty-fours inftead of thoufands ; and fo on. £. gr. To write down 95, he placed his figures thus: 1133 ; the 3 in the place of units denoted 3, the next 3 denoted 3 X 4, or 1 2 ; the third figure, i , denoted 4 x 4, or 1 6 ; the next figure, I, denoted 4 x 4 x 4, or64; confequently 1133, in the quaternary arithmetic, was equivalent to 64 + 16 + 12 4- 5 =: or ill the common decimal numeration. The advantage propofed by thus changing the figures was, that in making the fignals 95, there muft be fourteen firings, or appearances of fmoke, which, in the other mode, is done by eight firings. In this arithmetic, a greater number than four never appears ; and there is kfs danger in mifcouiiting fo fmall a number. Some of the numbers in the diftionary muit be devoted to the fingle letters of the alphabet, as it is by means of them alone that proper names can be made out. Mr. Edgeworth, who, we believe, firft introduced the nu- meral fyftem of communication, gives the following account of its advantages, in point of fecrecy, over the alphabetical method, which is a great objeft in telegraphic communication. Although the alphabet may be varied at pleafure, and any arbitrary figns employed, yet thefe are poffible to be deci- phered by rules which depend upon the ufual arrangements of letters : thus, for inftance, a fingle charafter being exhi- bited as a word, muft, in the Englilh language, be either A or I. The proportion which exifts between the number of words of one, two, three, or any greater number of letters, can be clafted in catalogues, and from thefe the monofylla- bles of any cipher are eafily obtained ; and from the letters of thefe monofyllables, the letters of longer words are dif- covered. By fimilar rules, fome of which are very ingenious, and depend upon the phllofophy of language, any alph.ibetical cipher may be eafily unfolded. (See Cipher. ) But thefe rules, excepting a few of them, are ufelefs, when ciphers are employed to denote entire words ; and the moft obvious mode of difcover)' may be avoided, by omitting thofe common words which occur fo frequently in every lajiguage, as ihe, and, that, to, &c. ; and even fuppofing that, from its frequent recurrence, any word ftiould be difcovered, no progrefs can be made from fuch data, for the cipher of any word is an ifolated fa£l which leads to nothing farther. Suppofe the knowledge of any particular vocabulary ftiould fall into hands for which it was not intended, a flight change in the numeration, without any aftual change of the figures, would prevent difcovery : for inftance, fuppofe it is fettled between the parties, that 6, or any other number, is to be added or fubtraftcd from the numbers which are exhibited before referring them to tlie vocabulary. The advocates of the numeral fyftem ftate, that a letter can be communicated much quicker by fignals which exprefs words, than by fig- nals which exprefs only letters. Words may be forwarded as faft as they can be looked out in a didlionary, and even fafter, whilft only an equal number of letters could have been communicated by the alphabetical mode. Another alleged advantage refulting from the ufe of words in the telegraphic correfpondence is, that the words of the fame meaning in different languages having the fame number attached to each, a correfpondence could be carried on from one language into 9 another, which, though not grammatically corrttt, yet would be fufficif^tly intelligible. Proper names muft be fpell, which may eafily be done, every letter having a correfpond- ing number. , ' Mr. Richard Lovel Edgeworth, in the Tranfaftions of the Royal Society of Ireland, vol. vi. p. 125, has delcribed his telegraph, which is fimple, and admits of very numerous com- binations : it \', intended to reprefent numbers to which words may be referred. The machinery confifts of four indices or pointers, each capable of revolving on a centre or axis, fo as to affume dif- ferent pofitions. The ftiape of each pointer is that of an ifofceles triangle, of wliich the bafe is rather lefs than half the perpendicular. The four pointers are placed in a row, as jhewn hy Jig. 12, and, as in common numeration, the right hand reprefents units ; the fecond from the right, tens ; the third, hundreds ; and the fourth, thoufands. It is eafy to diftinguifti whether a hand moving vertically, points perpt-n- dicularly downwards or upwards, horizontally to the right or left, or to any of the four intermediate fituations : tliis pro- duces eight pofitions, which can be made by each pointer ; but of thefe eight pofitions, feven only are employed to de- note figures ; the upright pofition of the hand or pointer being referved to repreicnt o, or zero. The figures thus in- dicated refer to a vocabulary, in which all the words are numbered. Telegraphs of this kind, which are to be fixed at.permanent ftations, which may be feen clearly with tolerable glaflijs at twenty miles diftance, are to be mounted on ftonc or wooden pillars, fixteen or twenty feet high ; four of which muft be folidly erefted in a row ; and on the top of each a moveable circle or platform turns horizontally upon a centi'e, in the manner of a moveable windmill head. Acrofs the plat- form an axis lies horizontally, and carries the arm or pointer, fixed vertically at one extremity of the axis, whilft, at the other end, are eight handles to turn the pointer round by. The handles are fixed in their different pofitions by a catch or alidad. By means of the platform, the pointer may be turned to any part of the compafs ; and as one fide of it is painted black, and the other white, either fide may be employed, as the colour of the clouds, or the fituation of the place, may require. In managing a correfpondence by thefe machines, it is neceflary to have certain fignals eftabliftied ; nor are thefe fignals merely arbitrary ; it is abfolutely neceflary that they {hould be made by the two external pointers of the row, viz.. units and thoufands ; or by the two internal pointers, i-i-z. tens and hundreds ; elfe they could not be repeated by the intermediate ftations without confitfion ; becaufe,in the middle ftations, that pointer which reprefents thoufands, when con- veying a meiTageeaft wards for inftance, muft, when an anfwer is returned to an oppofite direftion, reprefent un-its. The fame change will take place between the pointer that denotes hundreds and tens. When any com.munication is to be commenced, the pointers that denote thoufands and units are to be whirled round till the fame is done at the correfponding ftation. When this fignal has been anfwered, the perfon wlio gave it proceeds to fend his intelligence. As foon as he begins, the pointer of hundreds at the oppofite ftation is turned to 2, and kept in that pofition till the word is made out from the vocabulary ; the pointer is then turned round to o, or zero. The perfon who is fpeaking, when he perceives by this fignal that he is underftood, turns all the machines to o, which is always to be done at the end of every word. Wiien aU his machines are in this pofition, his correfpondent again turns his pointer belonging to the place of hundreds to 2, to ftiew that he is ready to receive tl»e intelligence, and it TELEGRAPH. it is to remain there till he receives aiiotlicr wor J, and fo on, till all that is meant to be i;ud is iiiiiflied : the pointers of thoufands and units are then to be vibrated backwards and forwards, with the points downwai-ds, like pendulums, till the fame is done at the oppofite ftation. if any interruption takes place on either fide from a cloud, or fhowcr, or any accident, it is to be indicated by vibrating thovfands and units, with their points upwards ; which fignal muft be repeated from the oppofite ilation ; and whoever lias madfe the fignal of interruption,, muft make the fignal of recommencement, when he is ready to proceed. This fignal is by vibrating hundirds and /raj-, with their points upwards, and when this is anfwered, (hut not before,) the bufinefs may proceed. It fliould be obferved in general, that every iignal (liould be acknowledged by the party to whom it is addreffed. The vocabulary con'efpo;iding with the numbers denoted by this rnachinery is conipofed of a large book, Jig. 13, with mahogany covers, framed, to prevent them from warp- ing. Its fize, when opened, is 47 inches by 21 ; it confifts of 49 double pages, that is to fay, each flieet is folded in the middle, and when it is opened forms one page. Tiie book is divided into feven parts by^ thin flips of mahogany, which ferve to open it eafily at each of thefe divifions, every one of which contains feven pages, and each page forty-nine words. No more than forty-nine words are contained in each page, becaufe the numbers 8 and 9, and zero, are not admitted. This omiffion arifes from the ftruclure of the machinery, which points only to feven numbers, refcrving o for a point of reft, at which point the hands indicate nothing. In every hundred, there- fore, only forty-nine numbers are ufed ; and in every thoufand, only feven hundreds are counted. Each divifion of the book, feparated by the mahogany rulers, contains all the efficient numbers in feven hundred. Each of thefe rulers projedts beyond the fides of the pages, and is num- bered in fucceffion from i to 7 ; and they are fo placed below one another, as to permit ihc numbers on all fides of them to be leen at once, as in llie figure. When any number of thoufands is pointed out, it can by means of thefe rulers, be immediately feleded : the feries ot feven pages, which one of thefe rulers opens, is cut, like the alphabet of a ledger, at the edge in feven divifions. By thele means, the page containing the iiundrcd whicli i« wanted is inftanlly found. In the page thus obtained, the tens, from 10 to 70 inclufive, are divided from each other, fo as to be inftanlly diftinguifliable, and the units under, each divifion arc in like manner eafily felcfted. The following is a fpccimcn of feveji lines of the firll page, and tliougli it is but one-tenlh of tjie real fize, it is iufficienlly dlftiiift. Its contents arc divided into eight clafies, the words in each clafs being numbered downwards, from 1 to 77, omitting all cyphers, or zero, and all eights and nines. Wlien once the clafs required is afcertained, any number in the page can be found iminediately. As f6r inftance, the reader will eafily felect Clafs VII. N°li, Clafs IV. N° 15, and fo of the reft. Nothing remains to be explained but the manner in which the clafs in each page is pointed out by the machinery. For this purpofe, before the pointers are turned to any fet of figures, the pointer that reprefents thoufands is turned to the clafs that is wanted, and as foon as the correCpondent anfwers this fignal, thoufands is returned to o. Then all the pointers are moved to the places which denote the figures required for any word or fentence. When the clafs is thus afcertained, an index, which flides on the maiiogany cover of the book, is fet to the column belonging to this clafs. When an obfervation is made, tlie number of thoufands can be opened by the ruler. As foon as it is read off' by the telcfcope, the number. of hundreds is opened by the pages, where they are cut away, and the number of tens and units is feen on the page. As the pointers are moved in fucceflion from thoufands to units, the different divifions of the book can be opened as faft, as the pointers are moved. Specimen of the Vocabulary belonging to Mr. Edgeworth's Telegraph, Commnn Words. ■ Clafs 0. Wonls lefs CiitniTinn. Clafs 1. TcclinicalTerms 0, n, m. Cl.lb II. Perfons. CUs III. Officers. Cliifs IV. Places. Clafs V. Navy ami Mer- chant SItips. CIdfs VI. Phraffs and Sentences. Clafs VII. [U. A. 1-2. Ab. 13. Ac, I 14. Ad. 1 .s Ae. I16. Af. 17. Aa. 11. Aliafe. \}. Abate. 13. .'\hbcv. 14. Ahbcis. 15. Abliut. Ifi. Abdicate. 17. Abed, Abet. 11. Aback. 11. Abacus. 1-J. Abaft. 14. .Ab.itis. 15. Al)d(inicn. 16. Abdutftur. 17. Abeal. 11. Abbot. 12. Ackland. l.S. Acftini. 14. Achefiin 1 i. Adams. 10. Adamfoii 17- Adair. 11. Academy of Infcript 12. Acad, of B. L. Paris 1 3. Academy. 14 Account-Office. 15. Admiralty. 16. Af;ent to the. 17. Admiral. I 1. Abbeville. 12. Aberdeen. 1.3. Aberj;avenny. 14. Abinglon. 15. Abydos. 1(5. AbylTinia. 1 7 . Acadia. 11. Alias. 12. Ajjx. 13. Albion. 14. Africa. 15. Audacious. 16. •.Agamemnon. 17. America. , Attend to day la.- 14. - 15. - 16. . 17.- - to-morrow - to night - to-niorrotv nig - on Monday at A.M. .iP. M. at A.M at P.M. at P.M. at P. M. at A. M. The principal objcftion to Mr. Edgeworth's machine is, that it would be of a vaft fize, and each pointer would require a man to work it. He defcribes, at the end of his paper, a portable machine, which is made of fpars and poles jointed together, and braced by cords. We think the fecond kind of French telegraph, which was fet up between Landau and Paris, would anfwer the purpofe very well : it has five indicators, and the movements are made by machinery in the houfe below. Major C. Le Hardy, in the Tranfatftions of the Society of Arts for 1808, vol. xxvi. has defcribed a telegraph which is well adapted for exhibiting fignals which fliall indicate numbers. It has four indices or pointers, each confifting of a long arm, carrying a fquare index-board or pointer at the extremity. One of thefe pointers reprefents units ; the fecond, tens ; the third, hundreds ; and the fourth, thou- fands. All the four indices move on a common centre by the machinery ; and to diftinguiih them one from another, each board is placed at a different diftance from the centre, of motion, fo that in their motion they defcribe four circles of different radii. The pofition of the arm, with refped to the horizon, is made to iiKlicate the numbir which is to be exprcffed by each index refpeftively, and there arc ten dif- ferent poClionsfor each, anfwering to the numeral charaflers. To identify thefe ten pofitions, a large frainc is fixed dole behind the pointers, parallel to tiic plane of their motion ; • .-.nd TELEGRAPH. »nd this frame fiipports ten radial bars, which diverge from the common centre of motion. Tlie radii arc again inter- fected by other bars, forming four concentric arcs of circles, each correfponding in radius with the length of one of the four pointers or fignal-boards. By means of the radii, the pofitions of the pointers, and their correfponding numbers, are read off, wliilil the arcs ferve to diftinguifli the different pointers of units, tens, hundreds, and thoufands, becaufe they always (liew the length of the arms from the centre. By this machinery, 10,000 can be exhibited ; and for higher numbers, there are two fquare fignal-boards, which can be turned fo as to be inviCble or vifible at pleafure ; one reprefents 10,000, and the other 20,000, and both toge- ther 30,000, either of which numbers is to be added to the number (liewn'by the arms, according as thefe fignal-boards are exhibited. By this addition, this telegraph can exhibit as high as 40,000. The frame with radial bars is a good method of reading off the exact pofition of the arms ; and it is fo much more certain than trufting to the eye alone, that by its aid the arms may be fliewn in a much greater number of pofitions ; ftill, if each arm is diftindly capable of exhibiting ten fignals, it will be fufficient for the numeral method. Mr. Edge- worth's pointers, as we have feen, were only capable of eight pofitions for each ; and this obliged him to mutilate the fyllem of numbers, by taking away all the eights, nines, and zero. The dial-plate of a clock has been propofed as a model, and would make a mod excellent telegraph, as it might exhibit 144 figns, fo as to be vifible at a great diftance. The dial fhould only be divided into fix divifions inftead of twelve ; and this being raifed twenty or thirty feet above a building, and the indices and the dial being painted with very diftinft colours, would be clearly vifible. The dial, if fupported on one port, might be always turned to the direftion in which the information was to be conveyed. In the Supplement to the Gentleman's Magazine for 1 794, a telegraph is defcribed, which confifl:s of a femi-circle placed in a vertical pofition on a flrong ftand. The circum- ference is divided into tvs'enty-four divifions, which are ren- dered vifible by circular holes cut through the femi-circle. In the centre is an index, which can fucceffively be brought to point out any divifion, very much in the manner of the dial of a clock. In the night-time each divifion is to be furnilhed with a lamp, and the index is made fufiiciently broad to eclipfe or hide any of the lamps at pleafure to which it is turned, and by this means the letters of the alphabet are to be defignated. Mr. Garnet's Telegraph Of all the propofals for making a variety of fignals by the different pofitions of an index or pointer which moves on a centre, the following is the moll certain as to the identity of the pofitions, and hence it admits of the ereateft number of fignals from each pointer. It has alfo a farther advantage, that tliere is no neceflity for any frame or dials, like the three laft defcribed machines, which, as their divifions are intended to be obferved at, a diftance, muft be exceedingly large. The pointer or indicator of Mr. Garnet's machine is i\\t fame as the foregoing, and its different pofitions reprefent different charafters or letters : its length fhould be two and a half or three feet from the centre, for every mile of diftance. The diftant obferver can find out, and exaftly read off thefe pofitions by a wire fixed acrofs the eye -piece of the telefcope with which he ob- ferves, which eye-piece turns round on the end of the tube of the telefcope, fo as to bring the wire to be parallel to, or cor- refpond with the diftant pointer. This is as eafy to do as to look through the telefcope. The index or pointer has a fmall circle fixed on its axis of motion, and turning round with it. This circle is divided into twenty-four divifions, or even more, and each divifion is lettered with a letter of the alphabet. A fixed index is alfo provided, to wliich any letter on the divided circle can be brought by turning the pointer round, and this determines the pofition of the pointer. Or, inftead of an index, the divided rim of the circle may be concealed in a box, with a hole at one fide juft fufficient to fee one letter or divifion at a time, and then there can be no miftake in fetting the pointer. The eye-piece of the telefcope is to be made to turn round upon the end of the tube, and is to have a circle fixed upon it fimilarly divided and lettered. A fine wire is alfo to be ftretched acrofs the centre of the eye -piece in the focus of its lenfes ; and there muft be likewife an index or mark on the telefcope, to read the divifions of the circle on the eye-piece. If this circle be likewife enclofed in a box, having a hole to fee only one letter at a time, there will be lefs danger of miftake. The inftrument being correctly adjufted, it is obvious that (the eye-piece of the telefcope being turned round till its wire covers or becomes parallel to the diftant pointer) the index on the telefcope will point out the fame letter on the divided circle of the eye-piece, as is indicated by the index and circle of the diftant pointer : hence the two parties have the fame letter or charafter prefented to them by their refpeftive inftruments. The idea of reading the fignals by means of wires on the eye-piece of the telefcope is very valuable, and promifes many advantages. In intermediate ftations, there is always danger of confufion in making fignals to parties in both di- reftions ; becaufe an arm which inchnes towards the right when the telegraph is viewed in one direAion, in an op- pofite direftion vrill appear to incline to the left, and indicate a different thing : hence it is always neceffary for the parties to be informed, by a previous fignal, in what direction the communication is to be made, that the ob- fervers, when they fee a iignal made, may know whether it is intended for them, or for the next ftarion beyond. Now when the telefcope is ufed, if the circle of each telefcope be figured to correfpond with the circle of the pointer which is to be obferved with it, all fignals will become intelligible to any party who obferves them. The Rev. John Gamble fuggefted a form of telegraph, which confifted of four arms, each ten feet long, and fur- nifhed with a circular board .it the end. All the four moved upon a common centre of motion, and independently of each otlier, fo that one, two, three, or four, could be exhibited at different degrees of elevation with refpeft to the horizon, or with refpeft to each other, fo as to afford a great number of fignals. One of thefe was erefted in 1 803 upon one of the towers of Weftminfter Abbey, but has long been removed. About the time when telegraphs were firft ufed, this gentleman publifhed a fmall pamphlet, entitled " Obfervations and Telegraphic Experiments," which contains fome good ideas. Nodurnal Telegraphs. — In 1801, Mr. John Boaz of Glaf- gow obtained a patent for a telegraph, which effefted the fignal by means of twenty-five Argand lamps. Thefe were arranged in five rows, with five in each row, fo as to form a fquare. Each lamp being provided with a blind, with which its light could be obfcured, the lamps could be made to exhibit letters and figures, the fame as Dr. Hooke's charac- ters, by leaving fuch lamps only vifible as were neceffary to form the charafter. The mashine is defcribed in the Repertory of Arts, Firft Series, vol. xvi. p. 223 ; and in the Philofophical Magazine, vol. xii. p. 84. TEL T E L In the Pliilofophical Magazine, vol. xxix. Capt. Paflcy has defcribed a telegraph, which is nearly the fame as Mr. Boaz's, but with fix lights only; alfo what is called a Polygramic telegraph. The Chevalier Edelcrantz has defcribed a machine in the Tranfaftions of the Society of Arts, which is for working the vanes of a telegraph with boards, like^^f. 4, fo that by merely preffing keys, like an organ, and then turning a handle, the required fignals fhall be made. The telegraph was propofed with nine boards infteadof fix ; but as we confider tiiis form of telegraph decidedly inferior to thofe with arms moving on centres, we fliall not enter into any further defcription of it. To conclude, we clufs the telegraphic art amongfl thofe which are not carried to fuch a ftate of perfection as to be incapable of farther improvement : it is much to be wifhed that it could be fo fyltematized, that the communication of intelligence could be cffefted with the fame eafe and cer- tainty as by writing. We are confident of the pofTibility of this, from having obferved the abbe Sicard converfing with his deaf and dumb pupils by making figns of the fimplell nature with the hands, in which manner he could communi- cate his ideas on any fubjeft with more rapidity than by writing. TELEM, in Ancient Geography, a town of Paleftine, in the tribe of Judah, towards the extremity of this tribe, along the frontiers of Edom. TELEMANN, Gio. Philip, in Biography, one of the greateft and mofl voluminous mufical compofers during the firft fifty or fixty years of the laft century, in Germany. He was born at Magdeburg in 1681, and preceded Keifer as opera compofer at Hamburgh, for which city he produced thirty-five operas. His compofitions for the church and chamber are fuppofed to be more numerous than thofe of Aleflandro Scarlatti. In the year 1 740, his overtures on Lulli's model amounted to fix hundred. This compofer, like Raphael and fome other great painters, had a firft and fccond manner, which were ex- tremely different from each other ; in the firft he was hard, fliff, dry, and inelegant ; in the fccond, pleafing, graceful, and refined. Teleniann, who lived to a great age, drew up a well-written narrative of his own life, in the early part of which he was an intimate acquaintance and fellow- ftudent with Handel. The lift of Telemann's printed works, inferted in Wal- ther's Mufical Lexicon in 1732, amounted to twenty-nine ; and in Gerber's Continuation of Walther, fifteen or fixteen more are fpecified. But ftill double the number of thofe printed were long circulated in manufcript from the mufic- fhops at Jjeipfic and Hamburgh. The beft account of Telemann's profeffional merit as a compofer, was publiftied at Hamburgh immediately after his deceafe at 85, in 1767, by profefibr Ebeling, an excellent mufical critic, a friend of Emanuel Bach, a man of a refined taite, found judgment, and a perfeft acquaintance with the merits and various ilyles of the great muficians of his country. TELEMBO, in Geography, a river of South America, which joins the Patia, 8 miles N.W. of Baracoas. TELENGUTES. See Teleutes. TELENTO, a town of Perfia, in the province of La- riftan, on lhe fea-coaft ; 10 miles S.W. of Congo. TELEOLOGY, formed of TtXo;, end, and \oyt.c, dif- courfe, the fcience of the final caufes of things. This is an ample and curious field of inquiry, though pretty much aeglefted by philofophers. TELEPHANES, iu Biography, a celebrated performer on the flute in tlie time of Philip of Macedon. Accprdinp to Paufanias he was a native of Samos, and had a tomb crefted to him by Cleopatra, the fiftcr of Philip, in the road between Megara and Corinth, which was fubfifting in his time. The epitaph upon this mufician, which is pre- ferved in the Anthologia, equals his talents to ihoft of the greateft names in antiquity. " Orpheus, whom gods and men admire, Surpafs'd all mortals on the lyre : Neftor with eloquence could charm. And pride, and infolence difarm : Great Homer, witii his heav'nly ftrain, Could foften rocks, and quiet pain : — Here lies Telcphanes, whofe flute Had equal pow'r o'er man and brute." Telcphanes was clofely united in friendfliip with Dcmof- tlienes, who has made honourable mention of liim in liis harangue againft Midias, from whom he received a blovr in public, during the celebration of the feaft of Bacchus. As this was a kind of mufical quarrel, we fhall relate the caufe of it. Demofthenes had been appointed by his tribe to furnifli a chorus, to difpute the prize at this feflival ; and as this cho- rus was to be inftrudled by a mafter, Midias, in order to difgrace Demofthenes, bribed the mufic-mafter to negleA his funftion, that the chorus might be unable to perform their feveral parts properly before the public, for want of the ne- cefTary teaching and rehearfals. But Telcphanes, who had difcovered the defign of Midias, not only ehaftifed and dif- mifted the mufic-mafter, but undertook to iuftrutt the chorus himfelf. TELEPHIASTRUM, in Botany, Dill. Ekh. 375, fo called by Vaillant, from its refemblance to Tekphium. Sec Talinum. TELEPHIOIDES, Toum. Cor. 50. t. 485. DilL Elth. 377. t. 282. See ANnRACHNE. TELEPHIS, in Ancient Geography, a town of Afia, in Greater Armenia, fituated in the vicinity of the river Phafis. TELEPHIUM, in Botany, a name adopted from Diof- corides, whofe teAv.J'ioi' the plant we are about to defcribe was fuppofed, by Imperato, Clufius, and moft authors, to be. Dr. Sibthorp however fatisfied himfelf that the plant of Diofcorides was Cerinthe minor, and pofTibly alfo the afpera of Willdenow. To this conclufion he was led, firft, by the authority of the famous old manufcript with draw- ings, at Vienna ; and next, by obferving that C. minor is particul:u-ly common in Greece among vines in the fpring, as well as iu other cultivated ground,' as Diofcorides relates of his TiXtiiTiof. The yellow colour of the flowers alfo an- fwers to his defcription, which our Tekphium, in that point, does not, nor did Dr. Sibthorp obferve the latter in any part of Greece. — Linn. Gen. 149. Schreb. 201. Willd. Sp. PI. V. I. 1506. Mart. Mill. Dia. v. 4. Ait. Hort. Kew. V. 2. 173. Juft". 313. Toum. t. 128. Lamarck Illuftr. t. 213. Gxrtn. t. 129 — Clafs and order, Petilan- d/ni Trigynia. Nat. Ord. Hohraced:, Linn. Portulacee, Juff. Gen. Ch. Cal. Perianth inferior, of five oblong, obtufe, concave, keeled leaves, the length of the corolla, permanent. Cor. Petals five, oblong, obtufe, ere6\, tapering downwards, inferted into the receptacle.- Stam. Eilainents five, awl- fhaped, fhorter than the coroUa ; anthers incumbent. Pifl. Germen fuperior, triangular, acute ; ftyle none ; ftigmas three, acute, fpreading. Pcric. Capfule fliort, triangular, of one cell with three valves, and a central unconnetted re- ceptacle, half as long as the capfule. Seeds numerous, roundifh -kidney (haped. ' E(r. TEL Eff. C!i. Calyx of five leaves. Petals live-, inlerted into the receptacle. Capfule with one cell, three valves, and many feeds. 1. T. Impetati. Green Orpine. Linn. Sp. PI. 388. Willd. n. I. Ait. n. 1. (T. legitimum ; Cluf. Hill. v. 2. 67. Ger. Em. 520. Tilcpliio di Diofcor.ide ; Irapcrat. Hift. Nat. 662.)— Leaves alternate.— Native of Switzer- land, Italy, and the i'«uth of France. A hardy perennial, kept in our botanic gardens, flowering in fumnier. Nu- merous decumbent, round, herbaceous, leafy Jli-ms, a fpan long, but flightly branched, fpring from the crown of the root, fpreading in all dircftions. The leaves are fcattered, nearly fcfiile, obovatc, entire, fmooth, ghiucous, rather fuc- culent, an inch long, more or Icfs. Cymes terminal, foli- tary, convex, of numerous {moolhjlo'wei-s, with white, or pale flefli-coloured, petals. 2. T. oppofitifoUum. Barhary Orpine. Linn. Sp. PI. 388. Willd. n. 2. (T. myofotidis foliis, amplioribus, con- jugatis ; Shaw Afric. n. 572. f. 572.) — Leaves oppofite.— Found by Shaw in Barbary. Nothing is known of this fpecies but from his rude figure, and (liort defcription. The leaves arc elliptic-oblong, above an inch in length ; the lower ones ftalkcd. Tops of the flowering brnnches recurved, as in the Hellotropium. Petals fmall. Capfules of three valves, with many feeds ; fo that there feems no doubt of the genus. Telephium, in Gardening, furnilhes a plant of the fmall hardy perennial kind, of which the fpecies ufually cultivated for garden ufe is the true orpine (T. imperati). Method of Culture. — This plant is increafed by fowing the feeds in the autumn or fpring, in dry light mould, either where the plants are to remain, or in beds to be afterwards planted out. They appear in the fpring, when they fliould be kept clear from weeds, and they will flower the follow- ing year. It is alfo capable of being increafed fometimes by offsets, flips, or cuttings, planted out in the fpring feafon. It likes a dry light foil, in which it grows beft and lafts longeft. The plants afford variety in the common borders and clumps when placed in the fronts of thofe parts. Telephium, a mahgnant dangerous ulcer. The term is derived from Telephus, who was wounded by Achilles, and whofe wound, it is faid, became before he died a difeafe of the above kind. TELEPHORUS, in Entomology, the Necydalis Ca- rulefcens ; which fee. TELESCOPE, from T)l^:, at a d'ljlance, and o-xott/d, / fee, is an optical inftrument that enlarges the vifual angle fubtended by a diftant objeft, and thereby is faid to magnify it, fo as to render it vifible to the eye of an obferver. This property of niifking diftant objefts appear clofe to the eye, never fails to excite the furprife of every one who looks through a telefcope for the firft time ; but few, compara- tively fpeaking, have their curiofity fully gratified, as' it re- gards the means by which this wonderful phenomenon is effefted. They are told, that the tube through which they look, contains magnifying glaffes, or polilhed ijiecula, which, by a pecuhar arrangement, produce the furprifing effeft they witnefs, and there the explanation ufually ends ; but it is our province to give our readers a better account of this aftonilhing inftrument, which we propofe to do in a fyf- tematic manner, firfl; by giving a fliort hijlory of its inven- tion and improvements ; fecondly, by givmg a popular ex- planation of the theory of the dioptric conftrudion, includ- ing the doftrine of aberrations ; thirdly, by explaining the theory of the cata-dioptric conftruftion ; fourthly, by de- fcribing the jnoft approved infliniments, with reference to TEL the drawings that reprefent their figures on their refpeftive Hands ; fifthly, by fliewing how their magnifying poiuers may be meafured by dynametcrs, and varied by different arrange- ments ; and lallly, by exemplifying their iifcs in meafur- ing fmall angles and their correfponding terreftrial diftances. But before we proceed further with this fubjeft, we muft requeit our readers to perufe the articles Aberration, Catoptrics, Dioptrics, Lens, Mirror, Reflection, Refraction, and Speculum, in the preceding volumes of our work, in order that we may not have occafion to repeat what would otherwife have been neceffary to be in- troduced in this place, to render our account fufficiently full, particularly in that part of it which relates to the theory of fingle lenfcs. I. The Hijlory. — The invention of the telefcope, which was one of the nobleft that modern ages can boaft of, has ena- bled man to raife his eyes far above the furf.ice of the globe he inhabits, in fearch of worlds that v.-ere invifible to the unaffiited eye ; and the more perfeft his inftrument is made, the more celeftial bodies he difcovers fcattered through the infinitude of endlefs fpace. Whether this invention, was cafual, or the offspring of ratiocination, cannot perhaps be pofitively affirmed from any exift^ing document ; but the pro- bability is, that it was in a certain degree cafual : lenfes of both the concave and convex formation were ufed feparately to affift the human eye, antecedently to the conftruSion of any telefcope ; and the general belief is, that fome accidental placing of two lenfes, one convex and the other concave, of different focal lengths, at fuch diftance from each other, that the rays tranfmitted through them formed a pifture on the retina of the eye, led to the difcovery that they poffeffed the wonderful property of rendering a diftant body appa- rently more large, and confequently more near, than it will appear to the unaflifted eye, or to an eye ufing any fingle lens whatever : this difcovery, once made, would obviouily lead to the conftruftion ot an inftrument, in which this fimple combination of two lenfes would be the bafis. The honour of having conftrufted the firft telefcope, which was no doubt of the dioptric or refrafting fort, ( from JioTTT^o", a perfpeciive injlrument,) has been attributed to va- rious inventors, feveral of whom may have been equally en- titled to the claim of originality, though only one can be confidered as the Jirjl inventor. We profefs not to be in poffeflion of better information on this fubjeft than our pre- deceffors were, and therefore fliall fatisfy ourfelves with the enumeration of thofe perfons who appear to us worthy of being put on the lift of competitors for the honour of this noble invention. Mr. W. Molyneux has alferted, in his " Dioptrica Nova," that our countryman Friar Bacon well anderftood the nature of all forts of optical glaffes, and how to combine them fo as to form fome fuch inftrument as the telefcope ; and Samuel Molyneux, the Ion, has affirmed, that not only the invention but conftruftion of a telefcope is fairly attributable to Bacon, as may be collefted from various Latin phrafes in his Opus Majus; and Dr. Jebb, who edited this work, adduces a paffage from Bacon's maiuifcript, to prove that he aftually applied telefcopes to aftronomical purpofes fo long ago as in the 13th century ; the friar hav- ing died in the year 1294. The paffages to which Mr. Molyneux refers, in fupport of Bacon's claims, occur in his Opus Majus, p. 348, and P- 357- Jebb's ed. 1733. The firft is as follows: " Si vero non fint corpora plana, per quje vifus videt, fed fphae- rica, tunc eft magna daverfitas : nam vel concavitas corporis eft verfus oculum vel convexitas :" whence it is inferred, that he knew what a concave and convex glafs was. The fecond is comprifed in a whole chapter, where he fays, " De rlfion? TELESCOPE. vlfione frafta majora funt ; nam de facili patet per canoiios fupra-dklos, quod maxima pofTuiit apparere minima, et e contra, et longc dillantia vidcbuntur propinquiffime, cte con- vcrfo. Nam pofl'umus iic figurare perfpicua, et taliter ca ordinare refpeftu uoftri vifus ct rerum, quod frangentur ra- dii, ct fledtentur quorfumcunque voluerimus, ut fub quo- cunque angiilo voluerimus, videbimus rem prope vel longe. Sec. Sic etiam faceremus folem et lunam et ftellas defcen- dere fecundum apparentiam hie inferius, &c. :" i.e. greater things than thefe may be performed by refrafted vifion ; for it is eafy to underftand by the canons above-mentioned, that the greatelt things may appear exceeding fmall, and on the contrary : alfo that the moil remote objefts may appear juft at hand, and on the contrary : for we can give fuch figures to tranfparent bodies, and difpofe them in fuch order with rc- fpeft to the eye and the objefts, that the rays fhall be re- fra&ed and bent towards any place we pleafe ; fo that wi- fhall fee the objeft near at hand or at a diftance, under any angle we pleafe, &c. So that thus the fun, moon, and ftars, may be made to defcend hither in appearance &c. Mr. Molyneux has alfo cited another palTage out of Bacon's Epillle ad Parifienfem, of the Secrets of Art and Nature, cap. 5. to this purpofe : " Poffunt etiam fic figurari perfpi- cua, ut longiffime pofita appareant propinqua, et e contra- rio : ita quod ex incredibili diftantia legeremus literas minu- tiflimas, et numeraremus res quantumque parvas, et ilellas faceremus apparere quo velleraus ;" ;. e. glafles or diapha- nous bodies may be formed, that the moll remote objefts may appear juft at hand, and contrarily ; fo that we may read the fmalltft letter at an incredible diftance, and may number things though never fo fmall, and may make the ftars appear as near as we pleafe. Dr. Smith, however, who muft be confidered as having been a competent judge of this fubjeft, was unwilling to allow the inference, that Bacon actually made a telefcope, and conjeftures that he only conceived in liis mind how fuch an inftrument might be conftruftcd ; which, by the bye, is ftlll allowing the invention, though not the conftruftion, to have been his. But be this as it may, we find no further notice taken of any fuch inftrument as a telefcope until about the year 1560, when John Baptifta Porta, a Neapolitan, is faid by Wolfius to have made a telefcope ; but the defcription he gave of his invention in his Magia Naturalis is fo defeftive, that Kepler declared it unintel- ligible ; neither does it appear that this telefcope was ufed in any celeftial obfervation. Soon after this time, -viz. in the year 1579, according to the account of Thomas Diggcs, in his Stratifticos, his father, Leonard Digges, had learned from a manufcript book of the learned Bacon, how to dif- cover objefts at a diftance, by perfpeftive glafles fet at due angles, when the fun fhone upon them ; but it is not evi- dent whether the conftruftion refembled that of a telefcope or of a camera obfcura, nor whether it was of the dioptric or catoptric kind. According to Defcartes, .Tames Metius, while amufing liimfclf with making mirrors and burning-glafles, happened to look through two lenfes, one concave and the other con- vex, placed by accident at a proper diftance from each other, and thus difcovcred the property that fuch a combination of glaftes pofleftes of (hewing objefts at a diftance ; this difcovery is faid to have been neat the end of the i6th cen- tury. The fame difcovery has been alio attributed to John Lipperftieim, a maker of fpeftacles at Middleburgh ; but Bo- rellus, in his book entitled " De vero Teleicopii Invcntore," makes Janfen, or Hanfcn, (Zacliarias Joannidcs, ) another maker of fpeftacles at the fame place, the real inventor of the telefcope in the year 1590; and there feems to remain Vol. XXXV, little doubt but that Janfon was entitled to the honour. The account is, that after having arranged the glalTcs in a( tube, tliis ingenious mcctianic haftened to prefe?it it to prince Maurice, under a perfuafion that it would benefit him in his wars ; but the fecret foon became public, and Lipperlhoim immediately copied the invention. This firll telefcope mag- nified about fifteen or fixteen times, and its inventor vifwed with it tlie fpots of the moon, the body of Jupiter, and even faw fome fmall ftars above and below his difc, which appeared to move round him, and which therefore muft have been his fatellites. From this fource, it is fuppofed that Metius gained his information, as well as Cornelius Drcbell, of Alcmaer in Holland, who afterwards made fimilar mftrii- ments. We may alfo mention Francis Fontana, an Italian, as one who claimed the honour of this invention in the )ear 1608 ; but from what we have already faid, of Janfen par- ticularly, he cannot be confidered as the firft inventor, though it is poffible that the report of fuch an invention having taken place might incite him to devife the means of eft^ecling a fimilar contrivance. This, it is generally undcr- ftood, was the cafe with the famous Galileo, who, when profeftbr of mathematics at Padua, heard it reported at Venice, in the year 1609, that a Dutchman had prefcntcd count Maurice of Naftau with an optical inftrument, whicli had the property of making diftant objetfs appear as though they were near ; but notwithftanding about twenty years had elapfed fince the invention, the means ufed for producing the wonderful effeft were not known ; and Galileo, on his return to Padua, in a very few days not only contrived but conftrufted a telefcope, which he prefented to the doge Leonardo Donati, and to the fenate of Venice, together with an account of the conftruftion and ufes which the inftru- ment might be apphed to, both by fea and land ; for wlii^i fervice it is well known that his ftipend as profeftbr was thenceforth tripled. Among other difeoveries that were made with Gahleo's telefcope in the heavenly regions, the four fatellites of Jupiter were found by him to revolve round this planet in their refpeftive periods, and were called tlie Medkeanjlars, in honour of the houfe of Medici. This dif- covery took place early in the year 16 10, and Gahleo, pur- fuing his favourite ftudy till March, pubhftied at Venice his " Nuncius Sidereus," containing an account of all his difeo- veries, and dedicated it to Cofmo, the grand duke of Tiif- cany, who, in a letter written by himfelf, invited the aftro- nomer to quit Padua for an increafed ftipend, without the labour of a Icftureftiip. The firft telefcope which Galileo conftrufted had only a power of three times ; liis fecond was fix times more powerful ; and his third magnified thirty- three times, which, at fo early a date, was no contemptible inftrument. Hence Galileo, though evidently not the firft maker of a telefcope, has been confidered as entitled to all the merit that is due to fuch a noble invention, feeing he had no model before him, nor inftruftions how to proceed in the accom- pliftiment of his ingenious work. But though Gahleo was fuccefsful in the conftruftion and ufes of his telefcope, which was of the refrafting fort, with a concave eye-glafs, as we (hall ftiew prefently, vet it remained for that fagacious ma- thematician Kepler to explain, on philofophical principles, the ratioihilr of that conftruclion. It was he who firft ex- plained the nature and effefts of both the converging and diverging rays of light, after pafting through the refpeftive lenfes, and who demonftrated the principles by which new arrangements might be made in the glaftes, that would pro- duce a fupcrior inftrument. He ftiewed that in fmall obli- quities of incidence, the angle of incidence exceeds the angle of refraftion about three times. Ff He TELESCOPE. He alfo firft proved, that in a plano-convex lens, parallel rays are made to converge to a point which is iliftant from the lens jult the diameter of the fpherc of convexity ; and that, if both fides of the lens are equally convex, this point will be at the centre of the circle of convexity. It remained however for Cavalheri to dilcover and to prove, in cafes where the radii of curvature of the two fides of a double- convex lens are unequal, that as the fum of both the diame- ters is t« one of them, fo is the other to the diltance of the focus: and it may be proper to notice here, that the fame rules are applicable to concave lenfes, except that the focus is at the contrary fide of the glafs. It is reinaikable, however, that Dcicartcs, tlie pupil of Kepler, makes no mention of his tutor's improvements, in the art of conllrufling a telefcope, having been carried into exe- cution for feveral years after Gahlco's was brought into ufe. It was not till the year 1630, that Scheincr delcribes, in his " Rofa Urfina," the plan of fubftituting a convex inilead of a concave eye-glafs, as fuggelled by Kepler, to be ufed for aftronomical purpofcs, where the inverfion of the objeft is a matter of no importance, but where the increafed field of view is of material confequence. The iame mechanician foon after adds a fecond convex glafs to his eye-tube, by means of which the objefts become ereft, which addition was no improvement to the vifion, but rather a detriment ; and after him, Rheita gave an ereft pofition to objefts, by uiing three fimilar lenfes in the eye-tube inilead of two, whicli greatly improved the vifion, without other detriment than the lofs of a little light : and becaufe Rheita's telefcope was adapted for viewing objeAs on the earth, as well as in the heavens, it was diflinguiflied by the name of the ter- rejlrial telefcope, by way of diftinftion from Scheiner's aflronomical one. In both thefe telefcopes, as well as in Gahleo's with a concave eye-glafs, the power is eftimated from the focus of the objeft-glafs divided by the focus of tlie eye-glafs, as will be feen hereafter. The iludy of dioptrics now became general, and feveral improvements were offered by different individuals in die conftruftion of the refrafting telefcope ; but among the real improvers muft be placed the very ingenious Huygens, who, being well acquainted with the aberration of tlie rays of light arifing from the fpherical figure of the glaffes, con- trived a better arrangement of the eye-glafles than had before been devifed. It was however very foon found, that the power of a telefcope of any of the preceding conftruftions, could not be increafed by fhortening the focus of the eye- glafs alone, beyond certain limits, without introducing great indiftinftnefs, arifing from the fpherical aberrations ; and that the beft mode of gaining power, without diminution of light and diftinftnefs, is an increafe of the focal length, with- out much increafe of aperture of the objeft-glafi ; and a little experience (hewed, that it is neceffary to increafe this length in the duplicate ratio of the propofed increafe of power : i. e. in order to magnify fwlce as much, the focus of the objeft.glafs muft be made /our times as long as that of another telefcope that has the fame light and dittinftnefs ; and for any other power in a fimilar proportion. The con- fequence of this difcovery was, that different makers began to vie with, each other, with refpeft fimply to the length of their telefcopes : among thefe may be mentioned Euftachio Divini at Rome ; Campani at Bologna ; fir Paul Neille, Mr. Reive, and Mr. Cox, in England; and in Fiance, Borelli and Auzout. The laft-mentioned mechanician fuc- ceeded in grinding an objea-glafs of the aftonifhing length of 600 feet ; and it is faid, that Hartfocker made them even longer than this. It will here occur to the reader, that tubes of this enor- 10 mous length, if pradicable, could not be manageable by an obferver ; and hence we find, that tlicfe very long objeft- glaffes were fixed on the top of long poles, or to growing trees, and fo contrived as to be capable of adjuilment for the axis of vifion when turned to different altitudes, agreeably to the required pofition of the remote eye-glafs. But while the length of the telefcope was thus inconve- niently increafed, and the trouble of making good obferv- ations therewith proportionably augmented, it became a queftion to determine in what proportion the aperture might be enlarged with the increafe of focal length of the objeft- glafs. Auzout wrote a paper, and delivered it to the Royal Society in the year 1665, in which he affirmed, that the diameter of the objedl -glafs ought always to be in a fub- duplicate ratio of its focal length, or nearly fo ; and accord- ingly drew up a table of apertures fuitable tor all focal lengths, from 4 inches to 400 feet : upon which Dr. Hooke very properly remarked, that the fame glafs may have its aper- ture advantageoufly enlarged or diminifned, according to the quantity of light proceeding from the objeft viewed. While powerful telefcopes were thus obliged to be un- manageably long, and obtained the name of flfWa/ telefcopes, from thecircumilance of their having no tubes to be inclofed in, the immortal Newton had his penetrating mind occupied with meditated improvements on the figure and airangement of lenfes, and proceeding, as he always did, on rational prin- ciples, difcovered, from the elongated and coloured fpec- trum formed by rays of light palfing through a triangular prifm, and from experiments calculated to inveftigate the caufe of fucli an oblong form and coloured appearance, that light is not homogeneous, and that different rays are dif- ferently refrangible, when tranfmitted through the fame medium. This grand difcovery prefented difficulties Handing in the way of tlie improvement of the refradling or dioptric telefcope, apparently much greater than tliofe which had previoufly been difcovered, as arifing only out of the fpherical figure of the glaffes ; and all hope of fuccefs in making (hort telefcopes of great power, and yet with fuf- ficient light and diftinftnefs, but without an admixture of coloured rays, was given up. Yet to a mind like Newton's, it natur.ally occurred, that what could not be praftically effetled by refradlion, might probably be accompliihed by refleftion of the rays of light into a focus, where, as there would be no feparation of the colorific rays by a refrafting medium, there would be ne colour nor elongation of the focal point, arifing from any other aberration, than w'hat might be caufed by the figure of the reflefting furface ; he therefore abandoned his propofed plan of grinding lenfes after the figure of fonie of the conic feftions, (for which fir Chriftopher Wren contrived a machine,) to avoid the efFefts of fpherical aberration in dioptric telefcopes, and turned his mind to the improvement of catoptric or rather cata-dioptric telefcopes, which had been previoufly propofed to Defcartes by Merfenne, and aftually conilrufted by James Gregory of Aberdeen. The compofition for the bell metal for refleftion, and the mode of grinding an(J polilhing, as propofed and praftifed by Newton, we have already detailed under our article Speculum ; but as reflefling telefcopes have been con- ftruftcd differently, we will here introduce a fhort account of the refpeftive differences, before we refumethe remaining narrative of the improvenj- nts in dioptric telefcopes. The firft conftruftion of the refiefling telefcope was the Grego- rian, and moil of the portable refleftors continue to be of this conftrudtion at the prefent day : its large fpeculum is concave, perforated at the centre, and placed at the interior end of the large tube ; and the fmall rellettoris alfo concave, placed TELESCOPE. placed oppofite the central hole of tlie larcre one, in fuch an adjuftable manner, that the rays, after a fecond rcflcftion, crofs one another, and come to the eye-glafs in fuch a way, that an ereS pifture of the objeft, or rather of the image of the object, is formed on the retina of the eye. In this con- ftruftion, it has been fuppofed that the figure of tlie large concave fpeculum ought to be truly parabolic, bccaufc this is the figure recommended by Newton for his conllruilion ; but this conclufion is erroneous ; for it is the joint effeft of both the fpecula that muil be adverted to in tlicirrefpcftive figures, fo that the rays may come without aberration to the eye-glafs after bolh reflexions ; and in order to produce this joint effeft, the curve of the large fpeculum muft be fome- what more than parabolic, ■u/'z. approaching to hyperbolic, becaufe the finall fpeculum is alfo concave, and has its fepa- rate aberration. In the Newtonian conftruAion, the large fpeculum is, or ought to be, truly parabolic, and the fmall one plane, fet diagonally at an angle of 45° ; fo that the rays, after the fecond refleftion, come to the eye-tube on the JtJe of the large tube, and near its aperture : the rays do not crofs here, but come to a focus at the eye-glafs, where the objeft is reprefented inverted and well defined, as well as bright ; for when the rays fall obliquely on the fmall refleftor, they are almoil all reflefted without difperfion, which is an ad- vantage that this conftruftion has over the Gregorian. When the Newtonian telefcope was propofed to Huygens, he had the candour to acknowledge, which proved to be the faft, that there would not be that limit to the apertnre of a refleftor, that is prefcribed by natural neceffity to that of a refraftor, and that the power as well as light may be made far to exceed thofe of the latter. The next conftruftion of a reflefting telefcope was that of Caflegrain, defcribed in the Philofophical Tranfaftions of the year 1672. This differs from the Gregorian only in this particular, that the fmall fpeculum is convex, and the focus of the large or concave one may be longer than is re- quired in the other, for the fame length of tube ; the rays do not crojs after the fecond refleftion, and confequently the objeft is feen inverted, as in the Newtonian : but here the curve of the large fpeculum is lefs than parabolic, in order that the joint effedl of both the refleftions may be an ex- emption from aberration. Tliis adjuftment of the figures of the metallic furfaces is beft underilood and accomplifhed by the firft-rate opticians, and is but little known to mere theorifts. Of the Herfchelian telefcope we (hall only fay, in this place, that it differs from the Newtonian in no other refpeft, except in its fize and powers, and that the fecond refleftor is difpenfed with, the length of the tube being equal to the focal diftance of the large fpeculum, and the head of the ob- ferver being confequently placed at the upper end or aper- ture of the tube ; fo that, in this conllruftion, as little light as poffible is left from the fingle refleftion, the principal lofs being that which is intercepted, on its entrance into the tube, by the head of the obi'ervcr. The parabolic curve for the face of the fpeculum is equally proper for the Herfchelian as for the Newtonian telefcope. From thefe fhort hiftorical notices it will be feen, that Merfenne firft fuggefted the hint for conftrufting a reflefting telefcope, which muft have been before the year 1651, when his Catoptrics were printed ; or, according to Defcartes' third and twenty-ninth letters, written in 1639, though not pubhfhed till 1666, before thefe letters were written. Gre- gory, who might or might not have feen Merfenne's fug- s;eflion, publifhed an account of his conflruclion in his " Optica Promota," in the year 1663 ; but as he was not a fkilful mechanic himfelf, it is undcrllood that his telefcope was but an indifferent one, and that the theory of his con- ftruftion was not completely reahzed to his wifh. At this junrtn-e, fir Ifaac Newton, who was a good mechanician, as well as mnthematician and experiment.il philofopher, took the fubjeft into his confideration, and, by his fucccfsful labonrs, prevented tlie invention from faUing into oblivion. His proceedings met with interruption from the occurrence of the plague; but about the end of the year 1668, he be- gan his experiments on fpeculum metal, and, in the year 1672, produced two fmall refleding telefcopes. I:i thefe, the large fpecula were ground into a fpherical concave fur- faccj as being the cafieft to execute ; but he was aware that the p:i: ibolic curve, recommended by Gregory, would be preferable, when it could be accomplifhed by mechanical contrivances, which he judged to be within the reach of human ingenuity. The refult of thefe 'abours was communi- cated to the Royal Society of London ; and, through tlie medium of their fecretary, Mr. Oldenburgh, to the in- genious Huygens, who teflified liis approval of this con- ftruftion in an account which was pubhfhed in the Journal des S9avans for the year 1672 : and in this way, nearly the whole of Europe became acquainted with the Newtonian con- fi:ruftion. In the mean time, Caffegrain, a Frenchman, who had varied Gregory's conflrudtion, by iubflituting a convex inilead of a concave fmall fpeculum, as we have already ftated, in the fame journal (des Sgavans, 1 672), contefted the honour of having been the firfl improver of the original Gregorian telefcope ; which claim drew from Newton fe- veral objeftions to Caffegrain's conftruftion, that will indeed apply equally to the Gregorian. We have, however, re- cently witneffed in captain Kater an advocate for CafTe- grain's telefcope, in preference to that of Gregory, (fee Phil. Tranf. of London, 1813 and 1814,) principally with refpeft to the brightnefs and diflinftnefs of objects refpec- tively feen by them ; and his conclufion is, that much of the light is difTipated by the crojftng of the rays in the focal point, which is a doftrine waiting for confirmation. In Caffe- grain's telefcope, the pifture of the objeft itfelf is viewed by the eye ; but in Gregory's, the pifture of the image reprefenting the objeft at the point of croffing is only viewed ; which circumftance coiiititutes the effential dif- ference in the two conflruftions : and it is very probable that the light proceeding from tlie image of an objeft may not be fo vivid as that proceeding from the objeft itfelf, of which the image may be confidercd as a lefs enlightened reprefentation. It is remarkable that no improvement was made on New- ton's fmall telefcopes till about the year 1723, when Hadley prefented to the Royal Society a reflefting telefcope of Newton's conftruftion, in which the focus of the fpeculunn was 10 feet ^\ inches. Though Newton's were only fix inches long each, they were compared to the fix-feet refraftors, fuch as were made at that time ; but what muft have been the public feeUng, when Hadley produced his enlarged inftrunient ! This was found at leait equal in power to the famous Huygenian refraftor of 123 feet ; at leaft, its power and diflinftnefs were equal, though the light was not quite fo bright. Since Hadley's time, the reflefting telefcope has ex- perienced confiderable improvements from the labours of Mr. Short, Mr. Mudge, the Rev. John Edwards, Dr. Herfchel (now fir William Herfchel), and others who are our own contemporaries. But while reflefting telefcopes were undergoing their various improvements, and were fuperfcding the ufe of the long refraftors, the idea of concfting both the fphericnl and F f 2 prifmatic TELESCOPE. prifmalic aberrations was not abawloned. We tiave already alTertcd, under our article Circle, that Cheftcr More Hall, efq. of More Hall in EfTex, fo long ago as in the year 1729, conilrudcd telefcopes of different glaffes ; fome of which have been prefervcd, and found, on examination, to be of the achromatic kind, though not known by this de- fignation. But as we are not in pofTcffion of any record refpefting the invention and mode of conltrufting fucli telcfcope, we do not prefume to fay that this was the arche- type of the modern achromatic inftrument ; and, therefore, \vc do not conlider it as detradting from the merit of the philofophic optician, who afterwards deduced the principles of the invention from accurate and ingenious experiments, and made known his fuccefsful application of them at a time when his claim to originality might have been difputed, if the prior invention had been then divulged. It was not till about the year 1747 that Euler, not knowing what had been done by Hall, and profiting by a hint that had been fuggefted by fir Ifaac Newton, conceived the plan of conftrutting an objeft-glafs of two iuch ma- terials, of different refractive powers, as might counteract, by repeated refraSions, the- diiperfioii of the differently re- frangible rays, and thus bring all the rays into one focal point, fo as to admit of a highly magnifying eye-piece. Accordingly two objeft-glaffes were fo incloied in a box, as to include clear water between them, to be ufed inilead of a fingle lens ; and though the experiment failed of fuccefe, the memoir, written by Euler on the occafion, attracted the attention of the late Mr. J. DoUond, mathematical- inftrument maker of London, who foon after fet about making experiments, as Newton had done, to afcertain if the refraflive and difperfive powers of various tranfparent fnlj- ftances are in a conftar.t ratio, with the view of compound- ing, which he at length effefted, an objed-glafs that would bring the rays of light tranfmittcd through it to a focal point, without the prifmatic aberration. In the memoir which Euler had written, and which was publjfhed in the BerHn Memoirs of 1747, he affumed that the indices of refraftion might be expreiTed by the powers of a certain invai-iable root, and that the exponents of thofe powers are proportional for the different rays of lisrht pafling through different media. This paper coming to the hands of the ingenious DoUond, excited his attention ; and in the year J753 he addreffed a letter to James Short, " concerning a miftake in M. Euler's theorem for correfting the aber- rations in the objeft-glafTes of refrafting telefcopes ;" which letter was pubhfhed in the Philofophical Tranfaftions of the fame year ; the objeA of which was to prove that Euler had affumed an hypothefis, as the bafis of his calcuLations, which was contrary to both realon and experiment, or, as Short obferves in his accompanying letter, " contrary to the efta- bhfhed principles of optics." To this Euler replied, and maintained that his optical principle was a true law of na- ture ; but the practical tcfl of its truth was wanting, the uje that it was intended to be put to. In 1754, the Swedifh geometer KHngenfliema took up the fubjeft, which now attrafted the attention of various mathematicians, and attempted to prove that the Newtonian principle, oppofed to Euler's, is in fome extreme cafes irre- concileable with natural phenomena, and tlierefore ought not to be received as a law of nature. DoUond, therefore, thus oppofed, had recourfe to aftual experiment, agreeably to Newton's plan of philofophizing ; and, rejefting the pro- pofal of putting water between two menifci, with a view of <;orredling the prifmatic aberrations by a number of refrac- tions, proceeded to inflitute a regular feries of experiments, ■n order to determine what could be done by the oppofite refratlions of different diaphanous media; and as tliefe ex-* periments were the foundation of all the improvements that have followed in the conllruCtion of colourlefs, or what Dr. Bevis denominated achromatic, objedl-glafTes of a refracting telefcope, we fhall here introduce a fummary account of them. In the iirft place, DoUond contrived to form a hollow in- verted pyramid with two oppofite fides of glafs, asinjff. I, Plate XXIV. yljlrotwtmcal Inftruments, and placed in an in- verted pofition, within a triangular and equilateral prifm of glafs, to reft as reprefented in the figure. The veffel was then filled with clear water, and a ray of light made to pafs through both the water and glafs prifm : the angle at the junction of the glafs plates, clofing the veffel, was capable of enlargement or diminution ; and the glafs fides were made to recede or approach, until an objetl feen through the water and glafs prifm was in its true place, i. e. until the refrac- tion of the water balanced the oppofite refraction of the glafs. The refult of this experiment proved contrary to what had been expetted from Newton's experiments, I'/'z. an external objeft feen through this compound prifm was fringed with colours. But to be quite fure that there was no deception in the appearance, a glafs prifm, formed to an acute angle of only 9 degrees, was fubftituted, which was alfo more convenient for the experiment, and then the veffel was clofed, as in Jig. 2, until the oppofite refradlions balaiiced each other as before ; but ftill the objeft viewed through the compound prifm was tinged with the prifmatic colours. The mean rays in thefe trials proceeded in a flraight hne, after quitting the iecond wedge of water ; but the extreme rays were deflefted, or turned refpeftively out from exaft parallelifm. After having thus afcertained that equal and oppofite re- fractions of glafs and water will not dellroy the colours, the author varied the experiment, by altering the wedges of water, till he found that the refraction occafioned by the water muft be to that occafioned by the glafs as 5 : 4, be- fore the colours will difappear. The next ftep was to purfue the proportions thus alcertained, in the conflruftion of an objedl-glafs containing water ; but after uniting a deep and double convex lens of pure water with a concave one of glafs, the objeft feen through the tclefcope with this com- pound objeft-glafs was indeed free from colour, but by no means fo diftinft as was defired, and confequently the fpherical aberration yet remained. This tclefcope was made in 1757, and ferved to prove that the feparation of the ex- treme rays, or what has fince been called the difperfive poiver, in the cafe of an union of glafs with water, is not proportioned \.o the viean refradion ; as fir Ifaac Newton had afferted it to be, in the fame experiment (fee Newton's Optics, p. 112, 3d edit.): confequently the idea muft now have occurred of trying other diaphanous fubftances with different refradtive powers, to fee what the difperfion would be in them. After an interval of fome time, during which different kinds of glafs were procured, the ingenious and perfevering artift found, for the firft time in the year 1757, that the difperfive power of the cryftal or white JUnt-^^Ss was greater than that of the Enghlh rrown-glafs, and alfo that the power of the latter was very fimilar to that of the Venice ftraw-coloured glafs. He determined, therefore, to try a wedge of flint-glafs, and another of crown-glafs, formed to different angles, as '^^ Jig- 3, until, when reverfed, their oppofite refraftions were equal ; which equality took place, when their angles were refpectively 25 degrees and 29 degrees ; in which cafe, the fines of half the angles, or the indices of their refraftions, were 216 : 250, or nearly as 19 ; 22. But though the direftion of the pencil of light TELESCOPE. was now u-nclianged, as was expefted, the compound rays had not all ti.e fame divergence. The fhape of the wedges was then modified, fo that the colours difappcai-cd by a due oppoCtion of their refpeftive difperilons ; and when this was effeiited, the refraftive powers of the two wedges were four.d nearly 2:3; and, confequently, the fines of half their angles, 19 : 33 ; which ratio is nearly 4 : 7. In this fjtuation of the wedges, the rays which enter parallel emerge alfo parallel, while they are equally deflefted from the points of emergence. Thefe refults may be obtained very (Irikiiigly by d.n union of four wedges, or pair of compound wedges, as reprefented in Jig. 4, where tlie crown receives the rays firft, and where the rays, at equal diftances from the central line of union, meet always at the fame point. This, (here- fcre, pointed out the conftruftion of a double objciil-glafs, fuch as is reprefented in Jig. 5, in which the convex curve of the crown-glafs is to the concave curve of the flint of given qualities nearly as 7 : 4, or nearly in the ratio of their refpeftive difperfive powers. But to avoid the too great cffeft of fpherical aberration, arifing from the quick curves, the fingle convex lens of crown-glafs was made into a double convex, with double the radius of convexity ; and alfo the fingle concave might be made double, with a fimilar increafe in its radius of concavity, to anfwer the fame purpofe as the combination laft defcribed. But, in this cafe, the con- vexity of one glafs would not fit the concavity of the other, fo as to come nearly in contadf throughout : it appeared ne- cefTary, therefore, that while the internal faces fitted each other, the external concavity of the flint-glafs Ihould be eight times lefs, or of longer radius than before propofed, in order to maintain the balance of oppofite difperfions ; or otherwife, as in Jig. 6, if the double concave faces of flint- glafs remain as above ftated, the front convexity of the crown-glafs muft be five-fevenths of the due curvature, as propofed above ; while the inner furface remains in perfeft contaft with the concavity of the other. In thefe com- binations, the fuperior refraftion of the convex lens, being diminiflied one-third part by the oppofing refraftive power of the concave lens, required this convex to be ground and poliflied to a focus three times fliorter than would be required for the fame lens ufed fingly ; and the option, that is af- forded the artift:, of varying the curves at pleafure, provided the combined effedf of the compound lens fliall produce a proper effeft in banifliing the colours, admits of a modifica- tion that will correft the fpherical aberration alfo, in a great meafure. Telefcopes on this achromatic principle were firft conftrufled in the year 1758, and when their merit was once acknowledged, the great number that the inventor and his fucceffors have had occafion to make, both for fale among their cuftomers, and for exportation, have afforded them the eafy means of trying a variety of concave and con- vex glaffes together in fuccelTion, before they were finally paired ; fo tliat their fuccefs not only originated in, but has been continued by, the aid of experiments, which no one but the Dollonds has had the power of executing to fo great an extent. See Dollond. Nor was J. DoUond's fuccefs confined to the manipula- tion of objedl -glaffes alone ; he had previoutly contrived and conftrudfed the improved fyftem of eye-glaffes, in which object he was followed by his fon-in-law, Ramfden. This improvement confifted in extending the ufual number of eye-glaffes to five, fo fyftematically arranged, that by dividing the errors of fpherical aberration, they reduced their amount to an inconfiderable quantity. The value of this arrangement will be befl underftood from his own words, which we will extraft from his letter, publifhed in the Pliilofophical Tranfaftions of the year 1753. " If any one," fays he, " would have the vifual angle of a tclefcope to contain 20 degrees, the ex- treme pencils of the field muft be bent or refradcd in an angle of 10 degrees; which, if it be performed by one eyc- glafs, will caufe an aberration from the figure in propor- tion to the cube of that angle; but if two glaffes are fo proportioned and fituated, as that liie refraaion may be equ.illy divided between tlicm, they will each of them pro- duce a refradion equal to half tlie required angle; and, therefore, the aberration being in proportion to the cube of half tile angle taken twice over, will be but a fourth part of that, which is in proportion to the cube of the whole angle ; bccaufo twice the cube of one, is but one-fourth the cube of two ; fo the aberration from the figure, where two eye-glaffes are rightly proportioned, is but a fourth of what mull unavoidably be, where the whole is performed by a fingle eye-glafs. By the fame way of reafoning, when tlie refraiSion is divided between three glaflcs, the aberration will be found to be but the ninth part of what would be produced from a fingle glafs ; becaufe three times the cube of one, is but one-ninth the cube of three. Whence it appears, that by increafing the number of eye-glaffes, the indifKnftnefs which is obferved near the borders of the field of a telefcope, may be very much diminithed, though not entirely taken away." We have given this quotation at full length to fhew, that in liis adoption of feveral glaffes in an eye-piece, the inge- nious mechanic was not entirely indebted to his experiments, unafTifled by reafoning and mathematical inferences, and accordingly the Royal Society rewarded his fkilful labours with Copley's medal. John Dollond was fucceeded in his bufinefs by his no lefs ingenious and induftrious fon, Peter Dollond, who improved the achromatic objeft-glafs IHII further, by placing a double concave flint-glafs between two convex ones of crown-glafs, as in ^g. 7. and by enlarging the aperture to 31^ inches in a 45-inch telefcope ; of thefe, a great number has been manufaftured, and feveral of five- feet focal length. His calculations of the radii of convexity and of concavity were never pubhcly made known ; and perhaps conftituted a fecret, on which the continuance of his celebrity depended, when the time of his father's patent had expired. The bufinefs is now fuccefsfuUy condufted by G. Dollond, the nephew, to whom we are indebted for much liberal information ; but at no period had any of the Dollonds an agent in Paris, as is faid in the new Supple- ment to the Encyc. Britannica. For feveral years from the time of the eldeff Dollond's death, the foreign TranfaAions were crowded with differtations and memoirs on the combi- nations of achromatic lenfes mathematically determined, and tlie fubjeft afforded ample fcope for the geometrical and analytical refearches of an Euler, a Clairaut, and a D'Alem- bert, as well as for Bofcovich, Klingenflierna, Ksftner, and Hennert : but in this, as in fome other fpeculative in- vefligations, the labours of the profound mathematician have not much benefited the practical advancement of the art to which thefe labours have been direded ; nay, they have tended to keep at a diflance from each other the mathe- matician and the mechanic. Bofcovich's eye-piece, however, may be confidered as conflituting an exception to the preceding remark, and de- ferves here to be particularly noticed. According to one of his theorems, an eye-piece free from colours may be compofed of two fimilar lenfes of the faine glafs, provided they be placed from each other juft one-half of the fum of their focal diftances ; which is very fimilar to the eye-glafs now commonly adopted, in preference to a fingle lens, ia the common allronoinical rcfrafting telefcope, the only dif- fcrcnce TELESCOPE. ference being, that in Bofcovich's the lenfcs are of equal convexity ; whereas, in the common improved aftronomical rye-piece, the iinier lens has a longer focus than the outer one, in the ratio of 3 : i, and being both plano-convex, they both have their curved faces turned towards the objeft- glafs. From the preceding experiments of the Dollonds, have refulted all th- advantages that the achromatic refrafting tclefcopes pofTefs over the long telefcopes with fimplc objefl-glafTes, and wliich have put them in competition with the beft refleftors in the eflential quahtics of power, light, and diftinclnefs of vifion. There is, however, an iniper- feflion, notwithftanding Dollond's great n-. In this cafe, the theorem becomes — ; ' • = A F — f; and the point F, or focus md — nd — iir of refrafted rays, is then in the axis B C produced." From this original theorem for finding the finiple refraftion of a pencil of diverging rays out of a rare into a denfe medium, may be derived other theorems for finding the fimple re- fraAion out of a denfe into a rare medium, and for the refraftion of lenfes of any of the common fliapes, either at the firft or fecond furface. We will fubjoin a fmall tabic of fuch of thofe theorems as apply to glafies of the ordinary conftrudlion. Theorems for one fimple Refraftion. Out of Air into Glafs Rays. Convex. Concave. 1 Diverging m d r — m dr -/• m d — n d — n r m d — n d ■{■ nr ParaUel m — n - '"'• _ J m — n Converging m d r — m dr -/• m d — n d -\- n r m d — n d — n r Out of Glafs into Air. Diverging — ndr _ md— nd+tnr ndr = /• m d — n d — tnr Parallel - "'■ . f '"' - f m — n m — n •' Converging —^ndr _ ndr md — nd + mr = /• md— nd— mr '' Hitherto we have confidered the refraftion of a ray at only one furface of a lens ; but as every lens has two fur- faces, or radii, r and R, it is neceflary to carry our invefti- gation farther, ancf fee what theorems can be obtained for finding the foci of glaffcs of the different fhapes, when double refraftion takes place, which is the cafe in all inftances of complete traiifmiflion. By way of diftinftion, we will con- fider r as the radius of the firft furface, or that which re- ceivei the rays from the radiant ; and R as the fecond fur- fice, or that which is fuppofed to be turned from the radiant, in all our fubfequent theorems. We muft now confider a ray, as M N, in ^g. 4, coming out of a denfe medium Y, after proceeding in a direftion towards F, into the rare medium X ; but meeting with a Ipherical furface N D, on quitting the denfe medium, is relrafted into the direftion N_/, to interfeft the axis Dy", in the focal pointy. When two Ipherical refrafting furfaceB are near to each other, as A M, N D, in Jig. 5, they conflitute a lens A M N D, of which the radius of the curve A M is r, when the radiant is on that fide, but that of N D is denomi- nated R ; and the hne B A D F, paffing at right angles through the middle of the Icbs, is called the axis. Now to find TELESCOPE. fifld the point /, or foca! diftai'.cc D/, of the ray D M, coming from tlie radiant B, after being twice refrafted, viz. at M and N, the points of ingrefs and egrofs, is the general problem of d'uiplrics. In folving this problem, our original theorem for fimple refraftion gives us m df — m d r - n rf + n df, ( making M F=; (?,) from which equation we deduce this expreflion ; viz. ■h d whxh gives thi _ j3^ _ B C A F T ~ o'^r ^ 7" ~'C F ^ A B' verfal canon : viz, "the ratio of the fine of incidence to the fine of refraftion, is compounded of the ratio of the dilLinces-of the conjugate foci B and F from the centre C, and of the ratio of their diftances from the vertex A." This rule be- ing general, finds the focus /, after the fecond refraftion at N : for let Df = f, the radius G D = R, and the thick- nefs of the lens A D = / ; then we have for the refraftion out of a denfe medium into a more rare one, - — • = — -- m /G /D (p+R-/ / <• , X ■t._ = i^ — X -^ — : irom whence we jret FD I + R (? — I f =: = D /", the focal diftance m 1(5 — m ^ + m R — B 9 + » / required. If we omit the tlu'cknefs of the lens /, as be- ing inconfiderable, we may reduce the equation into a more fimple form ; for we fliall have this will give ip =! »jip -(- ni R ■ n? = /; and = /• n R -)-«_/"— m/ md—nd- which equation reduced gives ndrK mrd — nrd + mdR — ndR. — nrR But to reduce the number of fymbols, let us put = a, and confequently m — n = a, when n is unity, drR and then this equation becomes ■=/' ard \- aRd— rR and this may with propriety be called the vniverfal dioptric iheorem, by which the refraSed focus of a ray may be deter- mined after paffmg through any lens of a given denfity, or refrafting power. The theorems in the fubjoined Table I. are all derived from the univerfal theorem thus determined, and will be of great ufe to the optician to determine the refraSed focus of any lens, and for any diftance of the radiant, which re- frafted focu», with parallel rays, will be always equal to the true, or nicely meafured/war/oiru/, where d is infinite ; vvhereas the focus determined from the old tht-orems in Table II. where the value of a is omitted, is always the geometrical focus, determined on a fuppofition that the fine of incidence is to the fine of refraftion in all glafles as 3 : 2, in which cafe ,1, e. = = \ invariably, and \ r. in a double convex lens of equal radii, of whatever rcfrac tive power, ;=/. In order, tiicreforc, to dl(lingui(h the focus determined from the theorfms in Table 1., from thofe arifing from the theorems in Table II., we will always call the firll the nfraSed focus ; which is that from which the powers of a telcfcope or of a microfcope are derived ; and the fecond we will denominate the fiomf/nW focus, which is that arifing from the fimple confidcration of the radii of curvature, without reference to the refraftive power of the glafs, otherwife than as we have ftated ; but is not- withftanding ufeful to opticians in the formation of the curved faces of their grinding and polifhing tools ; for when the curves of a lens of a given refraftive power are to be formed, to produce a given refraftcd focus, as is frequently required in the nicer optical inftruments, the rcfrafted focus mull firfl be converted, by means of the value a of its refraftive power, into the geometrical focus, and then the radii of curvature belonging to this calculated geometrical focus, will be proper for the tools of the Ions of a given re- fraftive focus. Hence we confider it as a matter of great praftical importance, to give, in the fame place, two tablet, one for finding the refraSed, and the other for finding the geometrical foci of fuch Icnfes as are ufually applied in either a telefcope or microfcope of the refrafting conftruftion. In all cafes where the glafs has two radii, the firft, as we have faid, will be douominatcd by r, and the fecond by R- But before we proceed to tabulate our theorems for both refraSed and geometrical foci of fingle lenfes, we wifii it to be clearly undcrllood by our readers, that the praftical appU- cation of thofe theorems, and of others to be derived from them, to the purpofe of aftual conftruftion of achromatic objeft-glaffes, and of achromatic eye-pieces, is intended to be the leading feature of our article ; for while volumes have been filled with abftrufe calculations, derived from formulae of the moft celebrated mathematicians, the refults of thofe calculations have never produced proper data for the ufe of opticians ; more particularly with rcfpeft to achromatic objcft-glafTes, which cannot be conftrufted from any calcu- lations but what are grounded upon experimental examin- ation of the identical Ipecimens of glafs that are intended to be ufed. And we flatter ourfclves, that the information we have to lay before our readers on this interelling fubjcft, will be ihejirfl that has yet been publifhed in fuch a praSical form as will facilitate the labours of the working opticiai;. Gg I Tabie TELESCOPE. Table I. Theorems for finding the rtfraded Foci of Lcnfts. Lenl'es with unequal Radii. Kiys. Diverging Parallel Converging Convex. (/R; f- Converging ^.=/- .^;=/- Lenfes with one Radius (R) infinite. Diverging 2dr ~ 2dr ^ d + 2r ~-'' d- 2r~-'' Parallel '^-f- ~ 2dr d ~^' Converging ./ + 2 r ^ 2dr 2r-d = J- Lenfes with one Radius (R) negative. Unequal. Equal. Diverging -2dRr - 2 ^ R r 2R. == '-f- dR - dr + 2Rr ~'-^' ParaUel -2Rr_ R-r -■^^ - 2 Rr Converging 2dRr 2^>R , ^ ,/R _ btnr + rtnnr D5- R« Again, dm -f rm — dn — D* + rm; if, therefore, D4 - R» Then dm dm + rm - T) Kmnr dn - Hbttir + Rtnnr = EF- DRmb - Dbtb T Rntb t I>brm — Rnmr This laft equation may be abridged, by fubllituting p for -, , that is, for , then we (hall have b m — n = EF. pDRmr — pDblr J- Rtnrp DRm - Di/+ Rnt + Tirn — pRmr Laftly, if we take n ■=. ph vn p'Qblr; and m — n = 3 in Tibt \ this equation will be finally reduced to this funda- mental equation, wi. pYiRrm — Dtrn + Rtrpn VV— f D Rm — Dim + D/n+ Rtn + 'Drm—pRrm~ ~^' The ratio of «i to n being taken in glafs as 3 : 2, we (hall have- » 3-2 equation will then ftand thus ; w'a. 6DRr - 2D• = 21.5. If the refra&ive power a of the glafs, and confequently the value of a, had been given, and it had been required to determine the radius of the tool that will grind the given glafs into fuch equal radii as will give the refrafted folar focus exaftly 17.82 inches, then f the theorem — = _/" becomes, hy tranfpofition, 2 a/ = r, and 1.298 X 17.94 = 21.5, as before. In a fpecimen of crown-glafs ground to the fame radius, where d was 4I4>75 inches, dr + rf gave « = 0.5318, and confequently m : n IS 1.531!: 21.5 : I, with which lens the true folar focus was 20. 2 1 4 ; and if the lens had been a fingle convex* 1.0636 the true folar focus would have been 40.428, r 21.5 a ".5318 or double the length of the former, while the geometrical focus for parallel rays, by Table II., would have been — — = 2 »• = 43.0 ; fo that for many praftical purpofes, a where m — n is known in the particular glafs ufed, the advantage of the theorems in Table I., over thofe in Table II., muft be evident Again, let us fuppofe that the ratio of wz : n is afcertained by a prifm of any fpecimen of glafs, or by Dr. WoUafton's or Dr. Brewfter's inftruments for this purpofe, and that it is known to be 1.599 • ' > then we know that .599 = a, as before ; and let it be required to find the refrailed focus ■with diverging rays, when the radiant is as before at the dillance of 417.25 inches, and the radius of curvature of each furface 21.5: in this cafe the theorem is dr J- • 1 417-25 X 21.5 = /, or, m numbers, — 2ad- I- 2 X 0.599 X 417.25 — 21.5 = 18.75, ^^ before; and in this way the terms given may be varied at pleafure, and the theorem made applicable to the cafe in queftion. If the rays had been converging in — dr the laft calculation, the theorem would have been r— — 2ad— r ■= f; or, changing all the figns, (which are here negative, becaufe the diitance is more than infinite, that is, the rays more than parallel,) the fame may be taken = f, ■zad -^ r 417.25 X 21.5 or ^^—^ — = 17.204, which IS lefs 2 X 0.599 X 417-25 + 21.5 than the folar focus by 0.74 of an inch. In this cafe the rays muft have pafled through fome other glafs, in order that they may proceed in a ftate of convergence before they enter the lens in queftion, and the focus of that other glais is here confidered as the radiant point from which the rays proceed in a ftate of convergence ; and this confideration leads us naturally to inquire into the nature of a focus when two glaffes are employed jointly to produce it, under the different circum- ftances of tigure and diftance. Suppofe the parallel rays A N and B M, mjlg. 8, to fall on a plano-convex lens M N, with the curved face turned to the radiant, and to be refrafted to its focus at F ; then if another plano-convex lens be placed in the line of its axis, at any dif- tance lefs than Cr,fo as to intercept the converging rays, tliey will be refrafted ftill more, and will now converge into the 7 (hortcr focuey, which it therefore called the eompound focut of both the Icnfes. The angle fubtcnded at/, where the eye is fuppofed to be placed, and which is called the optic angle, is now larger than that formed at F by the fuft lens, and it equal to what would be formed by the imaginary double convex lens E E, the focal diftance of winch would be y/- Now let C F be put = F for the fi.cal diftance of the lens N M ; OP :== ji for the focal diftai.c of lens G H J ^""^ Q/ — * ^°^ llic focal diftance of the imaginary double convex lens EE : alfo let Of, the compound tocal diftance, be = /; and CO, the diftance between the lenfes NM and G H, be = D. As tile rays, which tend to the point F, after leaving the lens NM, fall on the Iciis G 11 converging, let us call O F = ^, and then, by common opticB, we Ih^ yf have d = = F — D ; from wliich equation we get ¥ + y — D : Y — D :: y :f; and from this analogy the compound focal diftance O/ is calily obtained. In like manner, the parallel rays LG and SH are rcfradted by the lens GH, now fuppofed to bo the firft lens, to the Icn* NM, as they proceed towards the point i ; but are refrafted to the nearer point (f, which is the compound focus on the other fide ; and now we have Cy ^= ■= — ^ := _y — D : whence F + y — D : y — D :: F: <^ = C, which ig therefore known again, becaufe of the fimilar triangles F N C, FGO, and/Eg,/GO; and becaufe EQ = NC, we have CF : OF :: NC (^ EO) : GO :: Q/: O/; that IL F-D is, F : F — D :: K -./; and, therefore, p— ^ = «• E"t F — D X y we had above :;:; ;^ — f; which being fubftituted for_/", will give — F+^- D Fy = X ; from which theorem ow F+^-D problem for finding the compound focus of two lenfes, or rather the focus of one lens, that fliall have the fame focal diftance and vifual angle as two given ones placed at a given diftance (hall have together, may be tlius found : wi. " divide the produd of the two focal lengths of tlie given lenfes by their fum, leflencd by their diftance, and the quotient will be the focal length of tlie fingle lens, as re- quired." By way of exemplification, let the focus of N M be put = 6 inches, and that of GH = 4; and then, fup- pofing the curved furfaces turned to the radiant, which is called the beft pofition, as will be foen hereafter, and the diftance z=. 2, we fliall have, by the theorem for this purpofe. 6 X 24 = 3 for the focus in quef- 6 + 4 — 2 8 tion ; but if the diftance had been = 3, then the refult would have been 6x4 24 , _ .^ ^ — = —, or 3.42 nearly. But if 6+4-3 7 the diftance had been made 4, equal to the focal diftance of the lens G H, the compound tocus would have been 4 alfo ; and if 6, equal to the focal diftance of the lens N M, the compound focus would ftill have been 6, without any gain of magnifying power in either cafe, over what would have accrued from the refpeftive fingle lens ; alfo if the lenfes are brought into contadl, that is, if D = o, then we ftiall have the compound focus the ftiorted poflible, viz. 6x4 6 + 4-0 24 = — = 2.4. But dlJimSrefs is an objeft of TELESCOPE. of as much importance ai magnifying power ; and it will / _!_^ vvhen the rays fall diverging on the faid lens. be feen hereafter, that there is a certain d.ftance between y - J - r) the Icnfcs that promotes this quality the moll poflible, whatever be the radii of the two lenfes. This condition is wnaievcr oe iiic lauu ui mv .."« --- fulfilled when .v is = i F, that is, when the focus of the imaginary lens EE is jull o,,. lialf ot that of the outer lens N^?; in which cafe the compound focus /will be in the middle of the line OF, and the lens G H placed at half the focal di (lance of the imaginary lens. But it is not necei- fary that the objea, or image of an objeft u v, fliould be fituated in the exterior compound focus i? : this tocus may be fuppofed negative, that is, the image may be between the two lenfes M N and G H, as B A in Z^-. 1 1, which wUl always be the cafe when D is greater than y ; or, IB other words, when the diftai.ce between the two lenfes exceeds the focal diftance of the inner lens G H ; for let 6X2 F = 6, D = 4, and y = 2, and wc (hall have -— — = «, as in the ftrft isllance. Neither is it neceffary that 4 both the lenfes be convex or planoK:onvex, nor yet with the fame face outwards ; for fuppofe N M concave, when its focus will be negative, or virtually on the oppofite fide of it, and muft be expreiTed by — F ; in this cafe the theorem becomes — — — ^ — = X, for the focus of the imaginary lens E E j,_ F- D that (hall have its focus equal to the compound focus, which vnU always be pofitive while F + D is greater than y, but when lefs, then negative ; and when j ^ F + D, the rays proceed parallel, and the focus is faid to be infinite. The — Fx - Dx compound focal diftance in this cafe is — = f, and muft be affirmative when x is fo ; but when D = o, then f =■ X. As an example, let the concave N M have a nega- tive focal diilance — F — 3, and let y = 2, while D = i ; then the focal diftance of the imaginary or equal lens will be , or - — - = 3 = X, and the compound focal diftance 2 — 4 — 2 See Table II. Our general theorem may be rendered more extenfive ia its application, by varying it according to the data ; thus. will be 3x3 I X 7, Fx-xD r X— X JJ if F, X, and D be given to find y, it will be — = = J" » to find F with the others given, it will be D X- y = F; F>- =■ ±=z f. Whence, in 3 - 3 this cafe, /o is equal to 2 F O, whereas when N M was con- vex, we had the reverfe, FO = 2/0. When — F = jj, and "D =- 0, i. e. when a concave lens and convex one are placed in contaft, with their feparate focal diftances equal, then X becomes infinite, or, in other words, the rays emerge, and proceed in a parallel direftion ; but if the focal lengths are unequal, there will be a pofitive focus and magnifying power, vvhen the convex has the rtiorter radius; for fup- pofe - F = 3, j» = 2, and D = o, then by the theorem F X V n ,1 1 — 6 p— — , we (hall have — - = 6 = x, and in tliis cafe x = /= 6 hkewife. From thefe inftances it will be feen, on examination, that the compound fecal dijlance Of, of the com- bined lenfes, is nothing more than the focal diftance/, found by the common geometrical theorem of optics, ■ — f d — r •'' adapted to the conftant lens G H, where O F = r, and 0P = /, when the rays arc diverging; or Of— — / and to find D, there will be F + v = D. From X thefe analogies we may further obferve, that we have alfo the ratio of the two compound focal diftances to each other, 0/andC/,thus; as/: ?> :: F-Dx^ : .r - U x F; and, therefore, vvhen / = fubfequent details. The principal or Jolar focus of a lens, is that which is produced by parallel rays coming from an infinite diftance, which that of the fun may be confidered, and when the epithet refralled is added, it has reference to the particular glafs by which the rays are refradled ; but when geometrical is exprefted or underftood, then glafs in jreneral is meant : the virtual, refratled, or geometrical focus, is that which, in a concave glafs, would be formed by the diverging rays continued to a point backwards through the glafs till they meet, and is imaginary rather than real, and generally called negative : the focus arifing from con- verging rays pafling through a convex lens is (horter, or nearer the lens, than the folar focus, and the radiant is fup- pofed to be at a greater than an infinite diftance, if fuch an exprelTion is allowable ; but as no fuch diftance is in nature, converging rays can only be produced by their palTage through a firft lens before they fall on a fecond, which is often the cafe in the conftruftion of optical inftruments : but the focus from diverging rays is always more remote than the folar focus from the lens that produces it ; and, in con- fequence of the reference it has to the fituation of the radi- ant or illuminated objed, is denominated the proper and fome- times the relative focus ; for as the radiant approaches the lens, the proper focus recedes in the fame line, and vice verfJ, as we have more fuUy explained under the article Lens, Be- caufe the radiant and conefponding focus may change places at any time, the two points where they are placed, at oppo- fite fides of the lens, are called the conjugate foci, from their being fo dofely allied, that one cannot move without the other. When the radiant is placed therefore in the pri,nci- 6 pal TELESCOPE. pal or folar tocus of a lens, the rays will emerge and con- tinue parallel, on account of the other conjugate focus being at an infinite diftance ; and for the fame reafon, when an ob- jeft, viewed by a fingle lens, is placed in its principal focus, the rays will enter the eye in a parallel ilate, and will be converged to a point on the retina by the humours of the eye, and a number of thefe rays crofling will form a pitlure be- hind the eye of the objeft viewed : for, what is one of the mod remarkable properties of refrafted rays coming from a luminous objeft, they bring with them not only the figure, but the colours of the objeft viewed, and form a pifture or image of it, in the place where the different pencils of rays crofs one another ; and, what is equally remarkable, this pifture is not vifible until all extraneous light is excluded. We- will not pretend to explain this wonderful property of a lens, that direfts the tranfmitted rays fo as to form a pifture of a diftant objeft in its focus, but merely mention here, that, without it, no telefcope, microfcope, camera obfcura, or magic lantern, ceuld be conflrufted on dioptric principles. After having (hewn, by our foregoing theorems, how any focus, folar, proper, conjugate, or virtual, may be determined of a fingle lens, or of a combination of two lenfes w ith the intermediate diftance given, the fame might be done for any number of lenfes, by confidering the compound focus of the firft two lenfes, as the focal diftance of a fingle lens, to be combined with the third lens, and fo on till all the lenfes are included. Dr. Smith has given, in his Optics, chap. v. the application of Cotes's theorem " for determining the ap- parent diftance, magnitude, fituation, degree of diftinftnefs and brightnefs, the greateft angle of vifion and vifible area of an objeft feen by rays fuccefTively reflected from any number of plane or fpherical furfaces ; or fuccefTively refrafted through any number of lenfes of any fort, or through any number of different media, the furfaces of which are plane or fpherical, with an application to telefcopes and microfcopes ;" which account our readers may confult with advantage : hut as the illuftrations and demonftrations demand more plates than can be given to this article, in addition to the eight we have had occafion to introduce, we have been obliged merely to refer to them in this place. We propofe, however, to fubftitute fome praSical theo- rems, derived from our tables, which we have been favoured with by Mr. Tulley, that will be found extremely ufe- ful to the working optician, who muft be fuppofed, gene- rally fpeaking, unable to transform the theorems vvhich we have given in our tables, for the purpofe of finding the focal diftance of a lens, or of a combination of lenfes already con- ftrufted ; and which tabulated theorems arc principally ufeful for determining the powers, and for explaining the conftruc- tionofTm inftrument to which they are apphcable. Prad'ical Theorems. I . When r, the radius of one face of a lens, is given, and r, its principal geometrical focus, to find R, the radius of the other face, the theorem is rY R for a double 2r— F convex : thus, let r = 9, and F = 10.3 inches, and the cal- , . ... , OX 10.5 02.7 , , culation will be — — = -— - = 12 nearly, the 9x2- 10.3 7.7 truth of which may be proved by our theorem for parallel 2 r R fays with a double convex lens, in Table II. tx'z. _ ,or ' R + r Vol. XXXV. 9 X 12 X 2 216 , r I = = 10.3, as before very nearly, for the 9 -h 12 21 ^ ^ ' required focus ; and when the refraftive power or ratio be- tween the fines of incidence and of rcfraftion is given, this geometrical may be converted into the refrafted focus by the quantity 2 a, ufcd as a divifor ; or, on the contrary, the refrafted focus may be turned into the geometrical focus by ufing 2 a as a multiplier. 2. With a menifcus lens, where r, the convex fide, is given, r F - together with F, the theorem is .= for finding R, the concave fide. 3. But when the concave fide of a menifcus is given with the focus, to find the convex, the theorem becomes -^ = ^- 2r-f F 4. When the focus of a double convex lens, and the ratio between its two radii, are given, to find the aftual radii rand 2 r R R refpeftively, firft our theorem in Table II. = ■=. F, R + r will give the focus, on a fuppofition that one fide is unity, and the other any given quantity that forms the other term of the ratio ; fuppofe as i : 4 ; thus 1x4x2 = 1.6, the '+4 rational focus ; then fuppofe the focus given ^12, and there will be this analogy, as 1.6: i :: 12 : 7.5 = r; and 1.6 : 4 :: 12 : 30 = R, or otherwife — ^ = 7.5, and alfo will be the refpeftive 1.6 radii r and R, as 7.5 X 4= 30 before. 5. When the compound focus of two convex lenfes, and the feparate focus of one of them, are given, to find the fepa- rate focus of the other, that fhall be fuitable to form the combination ; if we puty"= the focus of the lens given, F =: the combined focus, and x — the focus of the lens required, /F for the theorem for this ufeful purpofe is example, let f= 36, and F = 15, then ^- ^ = 2^.7 nearly, for the focus of the lens required, which is a pofitive focus, becaufe both lenfes are double convex, and might be plano-convex, or one double convex and the other plano- convex, or even menifcus, as the ratio of the radii r and R may be difregarded when the focus only is the objcft of con- fideration. But whatever be the forms of the curves rela- tively, F, the compound focus of two lenfes, or more, will, in praftice, be the refrafted focus ; and, therefore, in this theorem, y and .v will alfo be the refrafted foci of the fepa- rate lenfes, and, confequently, when the geometrical focus ofyis given, it muft be converted into the refrafted focus by the divifor 2 a, before the calculation is entered upon ; it being necelTary that all the terms be of the fame deno- mination. 6. If F, the compound focus, be longer than /, the focus of the given convex lens, as is the cafe in the conftruc- tion of a double achromatic objcft-glafs, then the lens re- quired will be concave, of which the focus x is fought, and /F the theorem becomes — .= F-/ Hh Let us, in this example, rcTcrfe TELESCOPE. reverfc ihe numbers of/ and F, as taken above, by making / = 15, and F = 36 ; and then, as before, there wiU be ^5 X 36 _ 2- _ _ X, the negative focus of the concave 36 - 15 " lens required, which may alfo have any ratio of its curves, or be a plano-concave, provided its focus be that which has been here determined. . Likewife it mull be iccolleaed, that when a pofitive focus is required from an union of two lenfes, one convex and the other concave, the focus of the convex muft be fliorter than that of the concave ; or, in other words, the re- fractive power, depending on tlie thicknefs of the lens, when the fame glafs is ufed for both lenfes, muft predominate in the convex ; for it is the difterence of tlie oppofite refraftions t!iat brings the rays finally to a focus : confequently, if the foci are alike, the rays, being refraded alike in oppofite di- rottions, will become parallel, or have what is called an infinite focus : and alfo, if the focus of the concave be made the fliorter of the two, the rays, after oppofite refradions, will abfolutely diverge by the ditference of thefe refraftions, and have an imaginai-y focus, called a virtual or negative focus, at the other fide of the compound lens. 7. If the lens given be concave, and a convex one be re- quired to produce a given compound focus, which is another cafe in the formation of an achromatic objeft-glafs, the theorem will be J- „ = .v, where / is the focus of the F +/ concave, and might be put — /, to denote its being a nega- tive focus, and * the focus of the convex lens. Let us put / = 25.7, and F = 36, as above, and then there will b^ ^^'^ ^ 3 r= i_i!_ = 15, very nearly, for the focus x 36 + 25.7 61.7 of the convex required ; which, as we have faid, muft be the refrafted focus, and alfo /of a like denomination, in order to make the refrafted compound focus fuitable for a tube of thirty-fix inches. 8. If tlie compound focus fhould be required to be nega- tive, or to have the refraftion of the concave lens to predo- minate, when the convex lens is given with the compound /F focus, the concave may be found by this theorem = w, as in the laft ; but then x here is the focus of the con- cave lens, which therefore will be 15 when that of the con- vex is 25.7, and the negative focus, as before, 36. 9. But if the given lens be concave, and the compound focus be required negative, the focus of the convex fought fT will be had by this theorem ~ ^ = x, as in the fixth } Y-f theorem ; the focus x is here, however, that of the con- vex, which in the other was that of the concave ; fo that when / = 15, and F = 36, x will be again = 25.7, but negative. In all thefe cafes, the two lenfes are fuppofed to be in con- taft with each other ; but if D, the diftance between them, which is a variable quantity, were given, fimilar theorems /F iniffht be formed from our general theorem - — 4;; — - " ^ / + F — D aboye explained, where, in any pofition of two convex glafles, / is the focus of one lens, F the focus of the other, and D the diftance between them, with a pofitive compound focus ; hut if one of the two lenfes be convex, and the other concave, the general theorem becomes ■ /^ or /^ 7 -"F^ITD F-/-D' accordingly as F, put for the concave, or/, put for the con- vex, is the larger: the former theorem being the *' produfl divided by the fum of the foci, leftened by the dijiance," and tlie latter the " produR divided by the difference of the foci, leflened by the dijiance.^' Hence, by a tranfpofition of one or other of the forms of this general theorem, the data and poftulata may be varied as occafion may require. The firft: form is applicable in cafes where Aiding eye-pieces, or a Aiding fecondary objeift-glafs, are ufed in a telefcope, which, plans have been recommended and adopted by Dr. Brewfter, as we fliall fee hereafter. In confidering the theory of a telefcope, (of either the refrafting or reflefting fort,) our attention muil be diretlcd to two effential particulars, the image of an external objeft formed at the focus of the objeft -glafs, or of the large fpe- culum, as the cafe may be ; and the means by which this image is rendered vifible to the eye of an obferver : and ac- cordingly as the dimenfions, (hape, quality, arrangement, and number of the lenfes and fpecula vary from each other, may the conftruftions be faid to differ, though the efFe£t to be produced be intended to be the fame. That telefcope, of whatever conftruftion, muil be confidered the moft per- fect, which exhibits to the eye an image of diftaat objefts the moft diftindlly, as to light, colour, fliape, and propor- tion ; and which, at the fame time, amplifies this image fuf- ficiently to afford a minute examination of it, in a field of view- that is proportionably large to contain it. That quality, which appai-ently amplifies the objeft, or rather the image of the objeti, by enlarging the angle fubtended at the pupil of the eye, therefore called the vifual angle, is denominated the poiucr of the telefcope ; and in all telefcopes, whatever their other qualities may be, the light is diminijbed as the power increafes, fo that in every telefcope there is a limit to its ufe- ful power, which depends on the quantit)^ of light emitted or refledled by the objeft to be viewed ; and it would anfwer no good purpofe to increafe the power fo much, that a cor- refponding deficiency of light may render the objeft invifible. Hence different powers may be applied, with advantage, to objefts differently illuminated ; and hence different eye-pieces are ufually appropriated to the fame telefcope, particularly when it is deftined for celeftial, as well as for terreftrial ob- fervations. But we propofed to explain firft the theory of thofe telefcopes which are uftially called refraRing or dioptric, and afterwards of cata-dioptric, or thofe that magnify by the aid of reJleBion. Under our article Lens we have faid (in feftion 5.) that " the images of objefts, oppofed in any manner to a cpnvex lens, are exhibited invertedly in its focus," and that " they will be reprefented diilinaiy, and in their natural colours," on a paper held at the oppofite fide of the glafs, at nearly the diftance of its proper focus, efpecially if the room be darkened ; and in feftion 7. we have faid, that " the diame- ter of the image of an objctt delineated beyond a convex lens, is to the objeft itfelf, in the ratio of the diftance of the images to that of the objeft ;" fo that the more diftant an objeft is from the lens, the fmaller is the image of that objeft ; and alfo the fhorter is the focus of the lens, until the diftance is fuch, that the rays fall on its furface parallel, or nearly fo. Likewife (in fedtion 8.) we have (hewn, that " if the eye be placed in the focus of a convex lens, an ob- jeft viewed through it appears ereft and enlarged in the ratio of the diftance of the objeft from the eye, to that of the eye from the lens, if it be near ; but infinitely, if remote :" and what is faid of an objeft itfelf, when viewed through a TELESCOPE. convex glafs, is equally trus of the imagf of an objeft fo viewed. It is eafy, therefore, to conceive, how two Icnfes of different focal lengths may be fo arranged as to make a telefcope that will at the fame time invert and amplify, as to fenfe, a diftant objetl : for, firll, a lens of a long focal dif- taace will form a large image of the objeft oppofed to it, which image, by the eroding of the rays at the focal point, will be inverted a httle beyond the folar focus : and fccondly, viewed through the outcrmoll or firlt cyc-glafs, in the fame manner as the firft or inverted image was viewed tlirongh the original cye-glafs. This telefcope was denominated the terrejfrial telefcope ; and while the foci of all the three eye- glades were fimilar, its power and field of view remained the fame as in the aftronomical telefcope. The theory of thefe three conftruftions will be more clearly underflood by a reference to Plate XXV. of yijlro- an eye applied to a lens of (liort focal diilance, which is nomical Injlrumetils, in which fg. i. (hews the arrange held fo that its focal point may coincide with that of the ment of the glafles in the aftronomical telefcope ; Jig. 2 larger lens, will receive parallel rays, and will fhew the faid '■'""' -'" -' v ,y- • , ^ ,.. , ., . . image in an amplified or magnified ftate, and in the fame inverted pofition in which it is exhibited ; which image, by being enclofed in a darkening tube, appears with all its natu- ral colours. The power of fuch a telefcope, which is the fimpleft that can be made, is afcertained by finding how often the focal length of the fmall or eye-lens is contained in tlie focal length of the larger or objeft-lens ; the quotient of fuch divifion will reprefent the power. But if the eye-lens be made concave, and placed within the focal point of the objeft-lens, as much as is equal to the virtual focus of the concave lens, then the converging rays will become parallel, and afterwards, on entering the eye, which may be ccnfi- dered as a lens of fliort focus, wiU converge, and form a di- re6l image on the retina ; and though the total length of the telefcope will be (hortened by this latter arrangement, by twice the focal length of the eye -lens ; yet if the virtual focus of the concave eye -glafs be the fame as the focal dif- tance of the convex lens, the power will be the fame, and may be afcertained by the fame procefs. With a convex eye~glafs, the inftrument ariCng out of the firll arrangement is the original ajlronoviical telelcope, and that arifing out of the fecond is the Galilean. The field of view in the former conftruiSion is direftly as the efFeftive breadth of the eye- glafs, and inverfely as the interval between the lenfes ; but in the latter, the field is direftly as the diameter of the pupil of the eye, and inverfely as its diftance from the lens. In both thefe conftruftions, the fmalleft power, or, which is the fame thing, the fhorteft focus of the objeft-glafs is ■with parallel rays ; and as the diftance of the objeft, or ra- diant point, decreafes according to the principles of optics laid down under Lens, the focal diftance of the objeft-glafs increafes : and thus the power increafes as the rays become more and more diverging, from a gradual decreafe of dif- tance ; fo that, in faft, the fame telefcope magnifies a near objeft confiderably more than it does a diftant one ; for wliile the focus of the objeft-glafs increafes after a certain law, inverfely as the diftance decreafes, the focus of the eye-glafs remains unaltered ; and, confequently, the power varies inverfely as the diftance, or direftly as the variable focus of the objeft-glafs. To remedy the inconvenience of inverfion of the objedl in the aftronomical telefcope, and alfo of the contrafted field of view of the Galilean, two more glafles were added to the eye-tube, as we before ftated, to render the image of the fjbjeft ereR, or rather to form a fecond image in a contrary pofition. The primary intention of thefe two additional eye-glan"es was not to alter the power, but merely to give an ereft pofition to the apparent objeft ; the original lens that of the glafles in the Galilean, and alfo in the com- mon opera-glafs, except that in it the objea-glafs i< ufually achromatic ; and jig. 3. exhibits the fyftem of glafles that compofe the original terreftrial telefcope, or pcrfpeftive frlafs, before the fubfequent improvements took place. In all thefe figures the fame letters denote the fame parts, as tar as they extend ; and the magnifying power of each may thus be demonftrated to be as we ha\-e before ftated it. Let A E reprefent the objeft-glafs, and C D the cye-glafs oi fig. i ; and let H F I and G F M be confidercd as two pencils of light, proceeding in ftraight lines from the oppofite ends of a diftant arrow, and crofnng each other at the centre F of the faid objcft-glafs ; alfo let the dotted line be a pencil coming from the middle of the arrow, and falling perpendicularly on the fame central point, fo as to pafs along the axis of the glafles F L E. Lender thefe cir- cumftances, the angle G F H = I E M, the oppofite angle, is that under which the arrow appears to the natural eye at F ; but the angle I E M = C K D, is that under which the image I M of the diftant arrow is viewed, when magni- fied by the eye-glafs C D. But the angle I E M is to the angle I F M, as L F to L E, or as the focal diftance of the objeft-glafs to the focal diftance of the eye-glafs ; therefore LF Y-^ = the power, as before ftated ; and as the lenfes C D, N O, and T U, in^^f . 3. have equal foci, the fecondaij direft image P Q is equal to the primary inverted one I M, and appears under the fame angle. Novv if all the rays of hght had been, as they were fup- pofed to be before fir Ifaac Newton's experiments, homo- geneal ; and if a double convex lens, of equal curvature on both fides, had been found to refraft all thefe homogeneal rays into one focal point, without any aberration, either lateral or longitudinal ; then the telefcopes, we have juft noticed, would have been fufiiciently perfeft for all the pur- pofes of exhibiting a well-defined pifture of the objeft viewed in a magnified ftate ; and the power might have been increafed to almoft any extent, by varying the ratio between F L and E L ; that is, by incrcafing the focal diftance of the objeft-glafs, or by leflening the focal diftance of the eye-glafs, or by both ; but it was foon found that the rays which enter a lens at or near the edges, arc re- frafted to a point nearer to its furface than the rays that are tranfmitted near the centre ; and alfo that the rays of dif- ferent colours are differently refrafted, even from the fame point of the lens, fo as to meet in the line of the axis at dif- ferent diftances from the nearcft furface of the lens. The former of thefe deviations, being occafioned by the fphcrical therefore remained as before, and was called the/cW-glafs, as figure of the lens, is called \.\\e fpherical aberration ; and the being neareft to the field of view of the old arrangement of latter, arifingoutof the nature of folar light itfelf, is called the two glaffes, while the next glafs was called the fecond eye- prifmatic,chrotnatic, or Newtonian aberration. The indiftinft- glafs, and was placed at double its focal diftance from the field-glafs, fo that the rays might be parallel, and that it might form another image in its focus : this being the image of an image, was denominated the fecondary image, and became erefl by a fecond croffing of the rays, and was then nefs in the formation of the image, occafioned by thefe aberra- tions of the rays of light, became an objeft of fir Ifaac New- ton's attention, and he foon difcovcred that, whatever mechani- cal means might effc61 in the ihape of the curve that might reftify the fpherical aberration, the prifmatic aberration would Hh 2 remaic. TELESCOPE. fc-inaiii io long as one jubilance only remained to be the me- tliam of refraction. The ingenious Huygens, however, fuppofing that the diminution of the fpherical aberration would contribute greatly to the improvement of the tele- fcope, in-llituted lome experiments and calculations, which greatly promoted the fcience of Dioptrics. He found, that Sie lengthening of the radius of convexity of an objeft-glafs Ihortened the verled fine of the curvature, or lefl'cned the thicknefs of the glafs, on which, with equal apertures, the fpherical aberration feemcd to depend ; and alfo that, in a limple eye-glafs, the aberration from the figure was greateft in a double convex lens, when the curves of the two faces were from the fame radius ; and alfo that it increafed as the radius (hortened. The ratio l : l being found to have the greateft aberration, and I : 2 to have lefs, an inveftigation was inftituted, from which it was at length proved, that the aberration in a double convex lens is the fmalleft poffible, when the radii of convexity are to each other as i : 6 ; the face I being turned to the radiant or objedt to be viewed. From thefe experiments originated the famous Huygenian telefcope of 123 feet focal diilance, and a table of apertures correfponding to the refpedlive focal lengths of the objeft and eye glafles, that would exhibit an image equally well defined : which calculations were the bafis of all the long or (Kr/'a/ telefcopes that were in repute for a whole century ; but which are now fuperfeded by the (hort achromatic refractors. The fame ingenious author of dioptrics difcovered, that the aberration arifing from the curved figure of a lens might be Itill further diminiftied, by fubflituting two lenfes in the eye- piece of a telefcope inilead of one ; which difcovery was the foundation of all the improved eye-pieces that have been fince adopted, under different arrangements of intermediate diftance, and with different degrees of curvature. But before we can explain how the indiftinftnefs arifing from both the fpherical and prifmatic aberrations of mixed rays, may be in a great meafure counteracted, (on which im- portant confideration, the excellence of modern improved telefcopes depends,) it is neceflary to examine this fubjeft further, and to (hew how the circle of aberration of mixed rays arifing from their unequal refrangibihty, and alfo the lateral and longitudinal aberrations arifing from the fpherical figure of refracting and reflecting furfaces, may be mathe- matically determined. In doing this, we (hall avail ourfelves of Dr. Smith's propofitions, which are at the fame time per- fpicuous and conclufive. Prop. I. Aberrations. — " Let the common fine of incidence be to the fine of refraCtion of the leajl refrangible rays, as I to R, and to the fine of refraCtion of the mojl refrangible rays, as I to S ; and the diameter of the leaft circulai- fpace, into which heterogeneal parallel rays can be coUeCted by a fpherical furface, or by a plano-convex lens, will be to the diameter of its aperture in the conftant ratio of S — R to S -t- R- 2 I." For let an heterogeneal ray P A ( Plate XXVI./^. i.) fall upon a fpherical furface A C B, and let it be feparated by refraCtion into the rays A F, A/, cutting the axis E C, drawn parallel to FA, in F and /. Take the arc C B equal to C A, and let another heterogeneal ray P B, coming parallel to P A, be refraCted into the lines B F, B/, cutting the two former rays in R and S. Join R S, and produce it till it meets the incident rays produced in I and K, and the perpendiculars EA, E B, to the refraCting furface at the points A, B, in H and L. And when A B, the breadth of the •iperture or of the pencil, is but moderate, and confequently the refractions at A B but fmall, the angles of incidence and 10 refraCtion HA I, HA R, HA S, or the arcs th.it mea- fure them, or their perpendicular fubteules H I, H R, H S, will be to each other very ne;u-ly in the fame given ratios as thofe of the fines I, R, S, of thofe angles. And disjointly, the dilTerences of thofe fubtenfes will be proportionable to the di(fcrences of thofe fines ; that is, the fine R S : R I :: S — R : R — I, and doubling the confequents, R S : 2RIorIK-RS :: S-R : 2R- 2I; and con- jointly, R S : I K, or A B :: 6 - R : S + R - 2 I. From this given ratio of R S to A B, in which they increafe or decreafe together, it appears that all the intermediate rays which fall upon A B, will pafs through R S. And when parallel rays fall perpendicularly upon the plane fide of a plano-convex lens, they are refracted only at their emer gence from its convex furface ; and fo' the aberrations are the fame in both cafes. Q. E. D. Carol. I. — Hence the diameter R S, of the circle of prif- matic aberrations that contains all the incident rays, is a 55th part of the diameter A B of the aperture of a plano- convex glafs, whatever be its focal diftance. For fuppofing with Newton the prifmatic ipeCtrum divided into feven colours, and AR and A S to be the outermoft red and violet rays, their fines of incidence and refraCtions I, R, S, are to each other as- 50, 77, 78. Whence S — R is to S -t- R — 2 I, as I to 55. Carol. 2. — The diameter of the leaft circle that can receive the rays of any fingle colour, or of feveral contiguous colours, is alfo determinable from the proportions of their finei. Thus all the orange and yellow is contained in a circle, whofe breadth is the 260th part of the breadth of the aper- ture of the plano-convex glafs ; the fines of the outermoft orange A R, and yellow A S, being to the common fine of incidence, as 77^ and 77-i- to 50. Carol. 3. — In diftercnt furfaces, or plano-convex glaftes, the angles of prifmatic aberration R A S are as the breadths of the apertures A, B, diredtly, and as the focal diftances C, F, inverfely ; becaufe any angle, as R A S, is as its fubtenfe R S direCtly, and as its radius A R or C F inverfely. Lemma. — The verfed fines A B, AC, of very fmall arcs B D, C D, {Jigs. 2. and 3.) of unequal circles B D G, C D H, that have the fame right fine A D, are reciprocally proportionable to their diameters B G, C H, very nearly ; that is, A B : AC :: CH : BG. For fince the reCtangles under BAG and C A H are each equal to the fquare of A D, and confequently to each other, their fides are reciprocally proportionable ; that is, A B is to A C as A H to A G, or as C H to B G very nearly, when the verfed fines are incompai'ably lefs than the diameters themfelves. Q. E. D. Prop. II. " When homogeneal parallel rays N A, EC, {Jig. 4. ) fall upon a fpheric:! furface A C, whofe centre is E, the longitudinal aberration F T, of any refraCted ray A T from F, the focus of the pencil, is to the verfed fine of the arc A C, intercepted between the point of incidence and the axis E C F, in the given ratio of the fquare of the fine of refraCtion, to the reCtangle under the fine of incidence, and the difference of the fines very nearly ; and the aberration is the fame when the rays fall perpendicularly upon the plar»e fide of a plano-convex lens." For when the refraCtion is made in the paffage of a ray N A from a denfer to a rarer medium, then the interfeCtion T, of the refraCted ray A T, with the axis E C F, lies be- tween the refracting furface and its focus F. With the centre T and femi-diameter T A, having defcribed the arc A D, cutting the axis in D, draw the fine A P of the arcs AC, TELESCOPE. A C, AD, and alfo E N and E M, the fines of incidence and refrailion, for which put ii and m ; then bccaiife the triangles E T M, ATP, are fimikr, it will be as E T : TAor TD :: (EM : APorEN ::) EF : FC; and disjointly, T F : E F :: (F C - T D or) T F - C D : F C J and alternately, T F : T F - C D :: E F : F C ; and disjointly, T F : CD :: ( E F : E C ::)»«: m - n. Again, fince (P D : P C :: C E : D T or F C and conjointly) C D :CP:: (EF: FC::)m:n; by compounding this and the foregoing proportion, it will be as T F : C P :: ??/ m : m — n, n. Q. E. D. Carol. I — The fegment ACBPA may be confidered as a plano-convex lens ; and when rays fall parallel upon its plane fide, the longitudinal aberration of the extreme ray falling upon A is equal to ^ of its thicknefs P C, as appears by putting 3 and 2 for m and « refpeftively. ffi ffj A P'* Carol. 2. — Alfo this aberration FT = ^r^=^ x -^rp^ m — n,n 2 EC AP' r^^' 2CF A P' For P C = — j:^-^ very nearly, and EC X CF. Corol. 3 Let the refradled ray ATG produced, cut the line F G, perpendicular to the axis, in G, and the lateral , . T-^ mm APJ mm A P3 aberration F G = — x — Fr-;v = .-_ x 2 EC FG:TF :: AP : TP, orCFor 2CF' For X CE. Carol. 4. — When the femi-diameter of the convexity or the focal diftance is given, the longitudinal aberrations arif- ing from the figure are as the fquares, and the lateral aber- rations as the cubes, of the linear apertures of a plano- convex ler.s. Prop. III. " When parallel rays Q A, E C [Jig. 5. ) are rejle6led from a fpherical concave A C B, whofe centre is E, and vvhofe aperture, A C B, is but fmall, the longitudinal aberration T F, of the extreme ray A T, from the geometrical focus F, is equal to half the verfed fine C P of the femi-aperture A C very nearly." In Jig. 4. imagine E M, the fine of refraftion, to be di- minilhed to nothing, and then to become negative and equal to E N, the fine of incidence, and the refraftion of the ray to be changed to refleftion, as ^njlg. 5 ; and by the former propofition it will be, as T F : C P :: »n m : — m — n, n :: /in: 2 H « :: I : — 2. But the particular proof is this : By the laft lemma, the verfed fine C P nearly equals half the verfed fine P D of the arc AD, whofe centre is T, and femi-diameter TA or T E, or half the femi-diameter of the arc A C very nearly. But2TF = 2TE-2EF=:ED -EC = CDex- aftly, or C P nearly. Therefore T F = i C P nearly. Corol. I.— We had 2 T F ^ C D exadly, which is the excefs of the fecant E D of the arc A C above its radius E A. For joining A D, the angle D A E in the femi-circle D A E is a right one. A P' Corol. 2. — The longitudinal aberration T F = -ttv-- 4 C ii A P* For C P = — i=rF nearly. 2C£. A P' Corol. t. — The lateral aberration F G = — 2CE' For F G : F T :: A P : P T, or ' C E nearly. Corol. 4 — When tlie diameter of the concave or its focal diftance is given, the longitudinal aberrations are as the fquares, and the lateral ones as the cubes of tlic diameters of tlie aj)ertures. Pitoi". IV. " When parallel rays of any one fort are refradled by a plano-convex objeft-glafs, or when rays of all forts are rc- flefted by a fpherical concave, the diameter of each circle of aberration caufed by the fphericalnefs of the figures, is equal to half the lateral aberration of tlie extreme ray in each, and therefore is given by tlie former propofitions." Let a Y T be any refrafted or reflefted ray, cutting tlie axis E C T in T (Jigs. 6 and 7.), and the extreme ray A T G, that comes from the contrary fide of the axis, in Y. Draw Y X perpendicular to the axis ; and fuppofing tlie line A T G immpveable, as the point of incidence u moves from the vertex C, the perpendicular X Y will firll incieafe, be- caufe the angle Cra continually increafcs, and afterwards will decreafe, becaufe the line Tt continually detreafes; and when X Y is the greatell, it is evident tliat all the rays, in- cident upon the lame fide of the axis as itfelf, will pafs through it. To find its greateil quantity, let tlie incident ray qa cut the chord A P B in B, and fuppofing the variable aperture F 13 = v, the variable T X ~ x, and the given lines PA =«, PT =/, TF =i; by Cor.4. Props. II. and III. the aberration F t is to the aberration FT (b) as ■ktj'' or Pp^ (vv) to PA- (, or the greateft T X = ^ T F ; and there- fore the greateft X Y = A F G, becaufe T X : X Y :: T F : F G ; and this X Y, turned about the axis P X, defcribes the circle of aberrations through which all the rays falling upon A B will juft pafs. Q. E. D. Prop. V. " The circle of aberrations caufed by tlie fphericalnefs of the figure of the objeft-glafs of a telefcope, compared with the circle of aberrations caufed by the unequal refrangibility of rays, is altogether inconfiderable." For if the objedt-glafs be plano-convex, and the plane fide be turned towards the objeft, and the di.imeter of a iphere, whereof this glafs is a fegment, be called D, and the femi- ■liameter of the aperture of the glafs be called S, and the fine TELESCOPE. mm nn whofe diameter is '^^ x ^rir: very nearly, if they were all fine of incidence out of glafs into air be to tlie fine of re- fraftion as n to m ; the rays which come parallel to the axis of the glafs ftxall, in the place where the imago of the objed is moa diftindly made, be fcattcred all over a little circle, ?1 DD equally refrangible. As for inftance, if the fine of in- cidence n be to the fine of rcfraftion m as 20 to 31, and if D, the diameter of the fphere to which the convex fide of the glafs is ground, be loo feet, or 1200 inches, and confequently the telefcope about 100 feet long, and S, the femi-diamcter of the aperture, be two inches ; the diameter , . m m S^ -111 of this circle of aberrations, that is x =r^, will be nn IJL) 3' ^ 3' X ^^ tttSj'Aw parts of an inch. 20 X 20 X 1200 X 1200 But the diameter of the little circle through which thefe rays are fcattered by unequal refrangibility, will be about the 55th part of the breadth of the aperture of the objeft- glafs, which is here four inches. And therefore the aber- ration arifing from the fpherical figure of the glafs, is to the aberration arifing from the different rciiangibility, as TTs'AVo-o to ^f , that is as l to 5449 ; and therefore, being if) comparifon fo very Uttle, defervcs not to be confidered in the theory of telefcopes. If we fuppofe the little circle of aberrations arifing from unequal refrangibility, to be 250 times narrower than the circular aperture of the objeft-glafs, it would contain all the orange and yellow, and would per- mit the other fainter and darker colours to pafs by it, which perhaps may fcarcely affeft the fenfe; yet even in this cafe, the aberration caufed by the fpherical figure, would be to the aberration caufed by the unequal refrangibility, in a loo-feet telefcope, but as tttVtWtj- to -^, or only as I to 1200, which fufSciently proves the propofition. Q. E. D. Carol. I. — If the focal diftances and apertures of arefleft- ing concave and a plano-convex glafs be both the fame, the diameter of the circle of aberrations, caufed by their figures, will be above 30 times lefs in the refleftor than in the re- fraftor. For thefe diameters are ^ -^_- and =— - X 16 CF' T^^iry- which to = ,31 X 31 II X n' Hence, if the length of each telefcope be 100 feet, the lateral aberrations in the refleftor wonld be 30 x 5449, or 163470 times lefs than the lateral aberrations caufed by un- equal refrangibility in the refraftor. Carol. 2. — The number of pencils, fome of whofe rays are mixed together in every point of a confufed pifture, is as the area of the circle of aberrations of the rays in any one pencil ; and confequently the mixture of the rays of dif- ferent pencils, caufed by the fphericalnefs of the figure of an objeft-glafs, if they were all alike refrangible, would be to their mixture caufed by their unequal refrangibihty, as 1 to 5449 X 5449, or 29691601 in the prefent inftance. For conceiving any point in the confufed pidlure to be a centre of a circle of aberration, it is manifeft that all other equal circles of aberration, whofe centres fall upon the firft-mentioned circle, will cover its centre, that is, fome rays of as many pencils will be mixed in this centre as there are points in the circle iti'elf ; or, which is the fame thing, the number of pencils mixed in this centre is as the area of the circle of aberrations." Double achromatic OljeH-glaJfes. — From thefe five propoji- t'tons, and the corollaries deduced from them, in all of whicli tlie ratio of the fines of the angles of incidence and of re- fraftion out of air into glafs :s taken as 3 : 2, (which anfwers nearly to the French platc-glafs,) our readers will fee, that when any fingle lens is ufed as the objeft-glafs of a refrafting telefcope, there will be not only fringes of colour, but indiftinftnefs in the image formed at its focal point, arifing rcfpeftively out of tiie two kinds of aberration, the prifmatic and the fpherical. But Dollond has Ihewn, that thefe aberrations are not the fame in all forts of glafs : the former depends on the difperfive power of the glafs ufed, and the latter on the ratio of the radii of curvature of the two furfaces of the lens. The difperfive power of a prifm of any fpecimen of glafs will be to that of another like prifm of a different fpecimen, as the lengths of the prifmatic fpeflra, formed by them, are refpeftively to each other ; and if the foci of two lenfes of different difperfive powers; one convex, of crown-glafs for inftance, and the other concave, of flint, be made direftly as their difperfive powers, and be placed contiguous, fo that the convex lens may receive the rays firft, and be of the (horter focus, or thicker, its difperfive power will be fo counterafted by the oppofite difperfive power of the other thin lens of longer focus, that the extreme or prevailing colours of the primary fpcdlrum, being reverfed, will both difappear ; and a fecondary fpeftrum, compofed of the remaining in- termediate colours, will be very inconfiderable in a good achromatic objedl-glafs thus compofed. If the refrafted focal diftances of the two lenfes remain unaltered, when duly proportioned, as i : 3, or nearly fo, the proportion of the radii of the furfaces may be altered at pleafure, fo as to produce their due proportions of fpherical aberration. To effedt the defirable purpofe of baniftiing the fpherical aberration as much as poflible, the optician is obliged to calculate the aberrations belonging to convex lenfes of dif- ferent unequal radii, in order to make the contrary aberra- tions of the concave as equal thereto as may b* ; and for this purpofe the general theorem of Huygens is peculiarly adapted, which we (hall, therefore, introduce and ex- emplify here, before we proceed to the conftruftion of an achromatic objeft-glafs. According to this theorem, if we put r for the radius of the firft furtace of any lens, or that which firft receives the incident rays ; R for the fecoud fur- face ; and T for the thicknefs of the lens : then the aberra- tion arifing from the figure of any lens, concave or convex, •ill, 27>-'-h6rR4- 7R' T • fii /o will be = — ^ , X 1 univerfally. ( See 6 X rT^' Martin's New Elements of Optics, part vi. chap. iii. and Dr. Smith's Optics, book 2. chap, xiii.) When the centres of the curves are on oppofite fides of the lenfes, the figns are as here put down ; but if thefe centres are on the fame fide as in a menifcus, then the fign of r, or of R, muft be negative, as the cafe may require. For inftance, let us firft put r and R equal, and each = i ; then, as unity is not altered by multiplication or divifion, we (hall have the 27 4-6-4-7 fimpleft cafe, viz. — ^^ = 44 = !, or 1.66 of ^ 6x2x2 T, for the longitudinal aberration, and it will make no dif- ference which face of the lens is turned to the radiant. Secondly, let us take r = i, and R =: 2, in which cafe -2 = ^4, or 4 of T, very nearly. 0x9 ' But if we reverfe the fides in pofition, by making r = 2, and we (hall have TELESCOPE. nJ R = I, then the refult will be different, viz. 108+12+7 = tV> or nearly ^^ of T. The aberration 6x9 Jiere is more than in the former pofition, in the ratio of 127 : 67 ; and this is, therefore, called the woijl pofition ; that being always called the iejl, where the firft furface has a fhcK-ter radius than the fecond. If we fuppofe Icnfes of unequal radii to have their focal diftances, their breadth, and confequently their thicknefs the fame, it will be found, by a fimilar procefs, that their aberrations will diminifli, as R continues to exceed r, until /■ is to R as I : 6 ; in which cojiftruftion of a lens, placed in its beft pofition, the aber- ration will be a minimum, i parallel to the bafe ac : on entering the glafs it will be re- frafted towards this bafe, and emerge at the pointy, a little nearer to c than e is to a. At this point of emergence,/, the pencil will begin to difperfe into rays of different colours, but whether into feven or any other number, is not our prefent objedl to enquire. Let A B be a fcreen, receiving the difperfed pencil in a darkened room, and /^ will be the ray of mean refraftion, fh will be the red ray, or ray of leaft refiaftion, and f i will be the violet ray, or ray of greateft refraftion, h i being the length of the coloured fpec- trum. Let this prifm be of crown-glafs ; then fubftitute another of flint-glafs, exaftly in the fame fituation, and the extreme rays, /; and /, will now be difperfed to H and I, and the diftance between thofe new points will be the length of the fpeftrum with flint-glafs. Now the angle ^/B with both prifms is called the angle of deviation, or of mean re- fraftion ; the angle ifh is called the angle of difperfion with the crown, and I /H the fame with the flint prifm ; out thefe angles of dilperfion are fubtended by the lines ih and I H refpeftively, which are the lengths of their refpeftive fpeftra, which therefore are the meafures of the angles of difperfion of the two different prifms. Martin found thefe exaftly as 3 : 5, and therefore recommended the geometrical foci of the crown and flint glaffes to be altuiys in this proportion ; but Tulley has found that this ratio will not be accurate with all fpecimens of flint-glafs, and therefore takes a different ratio, for each fpecimen of glafs that differs in this quahty, from Martin's. In the fame fpecimen of glafs, the angle of deviation always bear» the fame propor- tion to the angle of difperfion, or diffipation as it is fome- times called ; and it was the opinion of fir Ifaac Newton that this is the cafe in all fpecimens ; but it remained for the fenior Dollond to difcover, which is the bafis of all achromatic conftruftions of an objeft-glafs, that the angles of deviation may be the fame, when the angles of difperfion are not the fame, and vice verfd ; and we haive a ftriking in- ftance in crown and flmt glafs, in which, when the difperfive powei^ TELESCOPE. powers are made to balance each other in oppofite direftions, there yet remains a balance of refraflive power in favour of the crown, ariiing from its greater thicknefs, which difpofes colourlefs rays ilill to deviate or be refrafted, but to a more diftant focus than would have been if the crown had been ufed alone. This effeft may be fcen injf». lo, where a pair of prifms, a and i, are infcribed in the double convex lens of crown-glafs, and the pair c and c within the double concave of flint : the incident rays de and ilr, at each fide of the axis go, enter the convex at the points ir and e, and are re- frafted towards the axis, till they meet with the inverted prifms c and c of flint, when they are refraftcd in a contrary diredlion, fo as to prevent their meeting at the point o of the axis to which they tended, and emerge at tiie points /" andy colourlefs, in confequence of the oppofite difperfions which take place in the prifms ; but after emcrfion they tend to a new and more diltant point O in the axis, and there come to an achromatic focus. To render this explanation ftill more intelligible with refpeft to the oppojition of two counteracting difperfions, let there be two feparate prifms, placed, as m Jig. il, at a diftance from each other, and inverted with refpeft to each other ; let a 3 c be the prifm of crown-glafs, and ABC a fimilai- one of flint-glafs ; and let two pencils of white light enter thefe lenfes in oppofite direttions, one d, and the other D ; then^ and G will be the rays of mean rcfraftion, h and H thofe of lead, or red ; and «" and I thofe of mod, or violet. Now as the refraftive power of the flint prifm A B C is greater than that of the crown a b c, the mean ray G in the firft will be nearer its prifm, than g, the mean ray of the fecond, to its prifm ; but the angle of difperfion fubtended by H I, will be greater than that fubtended by h i, wliile the prifms have the fame refrafting angles C and e. Now as the refraftion and difperfion in the fame prifm are proportionate to the refrafting angle, thefe may be both reduced to any aflignable quantity by a reduftion of the re- frafting angle ; then let the fide of the prifm of flint C A be ground down till it becomes C K, thereby making the angle B C A, the original refrafting angle, equal B C K, the new refrafting angle ; and let this fecond angle be to the firft as the refraftive power of the crown is to the refraftive power of the flint ; or, in other words, let the refrafting angles C and f be inverfely as the refraftive powers of the two fpecimens of glafs formed into prifms ; viz,, as that oi g fY : G F f; and then the mean ray G will be extended to r, and F c will be parallel toyC ; that is, the mean refraftion of the two lenfes will be ahke, the angle G F/= ^ sf^> by being alternate. In this fif.iation of the refrafting angles of the oppofite prifms, the rays would both enter and emerge parallel as to refradion ; but as to difperfion, that of the flint would ftill predominate a little, or the angle H F I would in fome meafure exceed the angle h fi : but thelo are the angles we want to have equal ; therefore, to make the refrafting angles C and c of the two prifms proportional to the dif- perfme powers, or to the fpeftra h i and H I in_/ff . 9, let the fide B C alfo of the flint prifm be groui'.d down a little to /, fo that the refrafting angle I C i ot this flint, fliall be to the refrafting angle a c i of the crown in this ratio of the fpeftra ; and then not only will the difperfive powers of the two prifms become equal, but, what is equally ntceffary, O will now fall beyond c ; thai is, the refraftive power of the flint by this fecond diminution of its refrafting angle, will become lefs than the refraftive power of the crown, and the difference of thefe powers will refraft the tranfmitted rays, as in fig. 10, finally to the diftant point O, as has been ex- plained, while at the fame time the rays that an-ive tliere will be without colours. If now we tonceive that the re- VoL, XXXV, frafting an^le of each of the flint prifms f and c, infg. to, infcribed within the concive lens c c, is fo proportioned to the refrafting angle of the prifms a and b, infcribed in the convex lens of crown a b, as the refrafting angle / C i of the fluit prifm u\J!g. n. is to the refrafting angle a c b of the CBown prifm, then the double objeft-glafs ii\ Jg. lO. will be achromatic ; its lenfes being analogous to the corrrft- ing prifms. Thus the theory of a double achromatic objeft-glafs is within the comprehcnfion of our ordinary readers ; and as the triple objeft-glafs has two thin con- vex lenfes of crown, inftead of one thick, to combine with the flint concave one, a farther explanation is unnecef- fary, particularly if the thick double convex be fuppofcd to be divided longitudinally into two plano-convexes, and to be placed one on each fide of the concave : for when thefe plano-convexes are formed into two curves, giving the fame focal diftance each as one of the plaim-couvexes, then the union of tlie three lenfes will be that reprefented in fS- 7- We may now proceed to exemplify this theory, arifiiig out of Dollond's grand difcovery ; and to make the conftruftion as familiar as poflible, we will avoid all fluxional calculations, and explain fuch algebraical ones only, as are indifpenfable, in the firft example at full length, as they occur, fo that the abridgments in the fubfequent examples may be clearly in- telligible. Our aim dift"ers from that of our predeceflbrs in this refpeft. The illuftrious mathematicians Euler, d'Alem- bert, Clairaut, Bofcovich, Klugel, and Robifon, have given formulae for the calculation of achromatic objeft-glaflcs, that are above the compreheiifion of ordinary opticians ; and Dr. Brewfter has calculated tables, according to thefe formulx, of the different curves that fuit a certain fpecimen only of flint- glafs, and that fuch as is not to be found, at Icaft in Eng- land ; viz. that which has its fines of the Z. of incidence and of the L of refraftion as 1.604 '■ '• Befides, the cal- culations tabulated are not in a praftical form in Table II., the radius of the convex being ftiorter than that of its contiguous concave. On the contrary, we propofe to take glafs that falls in our way, and to calculate in a familiar manner the radii of curvature that fliall fuit fpe- cimens already within our reach. In (hort, our predeceflort fliew how achromatic objeft-glaffes may be made, if proper glafs could be obtained ; and we wiU explain how achromatic objeft-glafles are made, and in the befi manner, vAth glaft of our own manufafture. Example i I^et it be required to form a double objeft- glafs of thirty inches focal length, from the fecond flint-glafi and crown-glafs given in Tullcy's table of experimental re- fults ? In the crown-glafs, the ratio of the fines of the angles of incidence and of refraftion (m ; n) is 1.528 : 1 { and in the flint-glafs it is 1-5735 : I ; while the ratio of their difperfive powers are .500 ; ,762, or I ; 1.524. The firft ftep is to determine the ratio of the geometri- cal focus of the firft or crown-glafs, to the compound focus of the propofed pair of glafles, in order that the radii of this lens may be kuown, before its proper com- panion, the flint lens, have its focus determined. It will be convenient to call the radius of the convex I, and as it is pro- pofed to have it a double convex, the geometrical focus will alfo be I ; but as the compound focus of both lenfes is the refraded focus always, the geometrical focus I niuft be turned into the re frafted focus alfo, in order to have both of the fame denomination : but to do tliis we want the divifor, which mav be taken from the table, or derived from — n . 1.528 — i.ooo X J ; thus — — n 1 .000 li ,528 X 2 = 1.056, ih*- divifor TELESCOPE. diTifor of the crown; and 7,^^ l.OOO = -5735 X 2 = 1.147, the divifor of the flint. In the next place we have '•°°° = .94697 for the refrafted focus of the crown lens ; 1.056 and becaufe the foci of the crown and flint lenfes mud be in the fame ratio as their difperfive powers, which we have Hated to be I : 1.524. ^^^ ^^^11 have ^^ = i.3827forthe 1. 147 rcfraftcd focus of the concave or flint-glafs. Now, having .94697 : 1.3827 as the ratio of the two feparate re- frafted focal diftances that fhall banifh all colours by their equal and oppofite difperfive powers ; we next find what will be the compound focus correfponding to thefe two when put in contaft. Let F be the focQs of the convex, and 'F that of the concave ; and by our /raff/ca/ theorem 5. there Convex. Concav r V R 'R F 'F T 'T A 'A m 'm F X 'F will be ;= = = the compound focus, which 'F — F pla numbers will ftand thus ; ■94697 X 1.3827 .94697 the 1.3827 proportional compound focus required. Now if the prifma- tic aberration were the only one neceffary to be counterafted, we have already obtained numbers that would enable us to con- ftruft an achromatic or colourlefs compound objed-glafs ; for 30 without interfering with the remedy which we have juft pre- fcribed for the other. In order to mark the diftinftion that muft be made in the fymbols, as applied refpeClively to the convex and concave lenfes, let it be underftood, that the fub- joined notation will be attended to in our inveftigation of the curves proper for our prefent purpofe ; viz. means the radius of the firft furface. means the radius of the fecond furface. means the focus from folar rays, or geome- trical, if fo exprefled. the thicknefs of the lens. the fpherical aberration. the fine of incidence. « 'n the line of refraftion. * the compound focus. It may be alfo neceflary to premife, that whatever ratio of the radii r and R be fixed upon for the convex lens, the ratio V : 'R of the concave may always be found by proper inveftigation fuch, that its aberration will countcraiSt that of /■ : R ; but the reverfe is not true ; the aberration of 'r : 'R may be too great for the aberration of any ratio r : R to equal ; therefore the ratio r : R is firft alTumed, as is moft convenient for the optician's tools already formed ; and 'r : 'R muft be fo calculated, that its aberration ftiall be in due proportion for correAing the aberration of the afTumed convex lens. We now have to do with the geo- metrical foci of both lenfes, when their radii become the if we multiply F, 'F, and / alike by -^^, or 9.12, the fubjeft of inveftigation ; and we have feen that 9.12 I- j geometrical focus of the convex lens, we fliould have the abfolute refrafted focus of F — .94697 x 9.12]= 8.636 ; that of 'F = 1.3827 X 9.12I = 12.61 ; and the compound focus = 3.29 X 9.12^ = 30 very nearly ; and it would be immaterial what the curves were, provided the refratled focal diftances of F and 'F were as above ftated ; but as the tools for forming the curves refpeftively tor the fides of thefe lenfes, muft have regard to the radii of curvature, it would be now neceflai'y to ufe the divifors as multipliers, to convert the rjfrac5ted into the geometrical foci, and then the bufinefs might be put in hand. On this fuppofition, of there being only one kind of aberration, the conftruftion of a compound achromatic objeft-glafs would be no difficult aff"air ; for while the focal diftances only are required to be to each other in a given ratio, the radii of curvature might be varied almoft at pleafure, without affefting the focal diftance. But there yet remains the fpherical aberra- tions of the two feparate lenfes to oppofe to each other in fuch proportion, that their tendency to produce indiJlincJnefs may be completely obviated. Before the time of fir Ifaac Newton, this was the only kind of aberration that opticians thought they had to contend with ; and though it ie fmall in quantity, compared to the prifmatic aberration, yet it is more difficult to conquer. It is, however, contrary to the opinion of that great philofopher and mathematician, in the power of the modern optician to cure this defeft of fpheri- cal glafles, by means equally fimple, when determined, as thofe by which the prifmatic colours are made very nearly to vanifti. As in the annihilation of the prifmatic colours, the ratio of the focal diftances, made direftly as the ratio of the difperfive powers, is a cure for the firft imperfeftion ; fo the ratio of the radii, r : R, of the two lenfes, fo calculated as to counteraft each other's fpherical aberrations, is the cure for the fecond imperfection ; and this cure we have yet to apply, 10 is the geometrical focus of the convex lens, therefore 1.524 X 9.12 = 13.9 is the geometrical focus of the eon- cave, their ratio being ftill as their difperfive powers, very nearly. Let us now aflume r = 7.5, or any other quantity at option, and fee by the proper theorem what R will be, to have a focus of 9. 1 2 inches : to do this we have, by No. I . of our praSical tl>eorems, before given, R, or, in figures. IS X 9-12 2 X = R 1 1.63 ; hence 7.5 - 9.12 )• : R :: 7.5 : 11.63, o"" ^^ ^ • I-55- I" ^^^ "^"^ place, we muft determine what is the longitudinal aben-ation arlfing from the figure of a lens, where the ratio r : R is 1 : 1.55, which is moft conveniently done by the general theorem of Huygens, which we have before exemplified, and which ftandsthus; ^-l^^L^^^i^' X T = A = 1.3614 x T. ^^ = r-i-Ri'= 1 + 1-55 multiplied by value of deno-1 rmnator 6.5025 _6 39-015 Then 53-1175 .3614 X T = A. 39.015 Having now found 1.361 X T = A of the convex lens, the value of T, which is the fum of the verfed fines of the two interfering curves of its furfaces, may be calculated by the fquare root, or by plane trigonometry, and will be found = .252, when the femi-diameter of the lens is 1.5, confequently 1.361 x .252 = .3429, is the abfolute quantity of the fpherical aberration of the convex lens ; but 'T of the concave TELESCOPE. concave is by calculation .1653, and '. T^" = 2.074. is it« .1653 proportional aberration. But as the thickiiefs, breadth, and geometrical focal length of every lens, of whatever form, mull, from the properties of the circle, be in proportion to each other (fee Martin's New Syftem, art. 705.), 'F may be taken at once, inftead of ufuig T and 'T with tlieir cal- culated values (which require fome operations), and then the work will be greatly facihtated ; thus 1.361 x T x 1.524 = 2.074 X 'T = 'A. Now, as this quantity 2. 074 bears the fame proportion to 1.361, as the focus of the con- cave does to the focus of the convex, it might be concluded that this would be the proper aberration to correft tlie aberra- tion 1. 361 of the convex lens; but this is not the cafe, for, firft, the longitudinal aberrations ariling from the figure are not in ihe Jtmple proportion to the foci of the lenfes refpeft- ively, neither is the quantity the fame with the flint as with the crown glafs. Martin afferts that the fpherical longi- tudinal aberrations are to each other, in like lenfes of dif- ferent focal lengths, inverfely dL?,\.\\e fquares of tiie foci refpeft- ivcly ; confequently, in our example, thefe aberrations would • 2C7C 'A - ■ = .883 =r z, the correfting divifor, and alfo — = .2914 •' ° » ^■074 .883 = 2.348 = 'A corrcdcd. Having now afcertaincd the aberration 2.348 x 'T of the concave lens, that will balance the aberration 1.361 x T of the convex, we muft proceed to determine the ratio 'r : 'R of the concave, that Aiall have exaftly thie aberration : to be able to do this without a table of aberration, requires an acquaintance with quadratic equations ; for the proportion of the radii '/• and 'R muil be invciligated from the correded aberration which we have now afcertained. 27'-' + 6rR + 7R' X T = A (by I ft. We have 6 X rr^"- the general theorem) = 2.348 x 'T, as before found ; but we make no diilinftion between r, R, T, A, and V, 'R, 'T, 'A, that we may fimplify the fymbols : this equation, by evolution of »- + R.1^ in the denominator, becomes 27 r^ -I- 6rR -I- 7 R' be inverfely as F' -. 'F^ ; or as 13.9 x 13.9^: 9.12 x 9.12'!; r^ + 2 r R -j- R' X g- = 2-348 X T : now by put- that is, as 193.21 : 83.174, or as •) , _ « f ! '^"'^ *'"S R — i, there will be 27r^ -f 6r + 7 X — = 2.348 when TuUey took 0.585 ^ 'A, this aberration was found much too little ; for when he had gronnd tke lenfes with curves to produce this aberration, he found that the eye -tube required to be drawn outwards more than inwards by the fcrew, from the true focal point, before the image difap- peared, which is a proof that the concave had lefs than its fhare of aberration ; it being confidered as a tell of good correftion, when the image difappears at points of the tube equally diftant from the point of diftinft vifion, accordingly as the tube is pulhed in or drawn out from its focal point. And here was probably the difficulty that Martin experi- enced between his theory and praftice. Neither was the aberration thus obtained in due proportion, when cor- refted by the fimple ratio of the two divifors 2 a : 2'a, or 1.056 : 1.147, for the difference of the refraftive powers; for as 1.147 : 1.056 :: 1.161 : 1.253 ; but 1.253 X 'T ^ 'A was ftill too little for due corredlion. Though the telefcope was achromatic by virtue of the ratio of the foci of the crown and flint lenfes, yet there was a want of perfeft dif- tinSnefs, owing to the deficiency of aberration attaching to the concave lens. After a multiplicity of inveftigations, calculations, and praftical trials, TuUey at length difcovered a method of balancing the oppofite aben-ations, which he has continued to pradlife with fuccefs for years, and which is therefore no new projeft. The method is this : the value of 'A (2.074 X 'T) being firft determined from A, in the ratio of F : 'F, as above explained, the correQing number is thus obtained ; if we call the fquare root of the cube of the refrafted focus of the convex r= x, the geometrical focus being taken = i ; and put alfo y for the fquare root of the cube of the refrafted focus of the concave, when its geo- metrical?focus is = i ; then — = z is the correfting number, X by which the proportional aberration, before determined, muft be divided, to gain the proper or correded aberration, 'A now exprelfed by the fymbols — . In the inftance before us, the calculation will be .947' = .8492781, and its fquare root = .2914 = x; and ^/ .872' = -2575 — y ; then + 2r -f I T X T ; or, dividing both lidts by — , 6 x 2.348 = 14.088, 27r^ -f- 6r + 7 . , . , . . . or 1 4. 1 = _, ; and multiplymg both by tJie * -r 2 i -f- I denominator, 14. 1 r^ 4- 28.2 /■ 4- 14. i = 27 /•' -(- 6 r + 7 : then fubtradling equal quantities from both, there remains 22.2 r -f- 7.1 =; iz.gr^i and by tranfpofition, I2.9r'— 22.2 r = 7.1 for the quadratic. Now to find the root, we have firft 12.9 7-1 12.9 ; and adding the fquace of half the _ . , 22.2 ii.il' co-emcient, r r 4- 12.9 12.9 7.1 II. IP h ; there- 12.9 12.9 fore the root r — II. r \/ 12.9 II. I = x/ 7-1 _^ iJj^V 12.9 12.9' and r = 4- have 7.1 II. ii 12.9 12.9 12.9 Laftly ; to colleft the aggregate of the values of r, we 7.1 1 1 . iV 12.9 •55' ^/i.29= 1. 135; 12.9 likewife .74, and V -55+^74) = I T 860 ; therefore 1.135 12.9 -r .860 = 1.995 ^^ '"' which was defired ; and the ratio r : Ri, which we now put ag.iin 'r : 'R =■. 1.995 • ' > ''"'1 which in TuUey 's Table ftands 2:1. After having thus determined the ratio of the radii 'r and 'R to be 2 : i very nearly, we muft now find the rational geometrical focal dil- tance of this concave by the fourth of our pradical theorems above exemphfied ; viz,, from ^„ , we firft have r -f- K = 1.333 ! •'""'' *' *'''■ geometrical focus is known 2x2x1 "14-2 to be 13.9, we 1 3.0 have alfo —^-^ = 10.428 = 'R, and 10.42S ••333 I i 2 X 2 TELESCOPE. V = 20.856 * = 30.04 X a = 'r ; fo that tlie four radii of the faces and the cor- refponding foci will ftaiid thus ; viz. r = 7.50 7 and F = 9.12, the geometrical focus of the R = 11.63 J convex lens. 'R = 10.428 1 and 'F = 13.9, the geometrical focus of the concave lens, the compound refrafted focus of the tele- fcopt', according to the proper theorem. We have now brought the calculations of our firft ex- ample to a conclufion, accompanied by fuch explanatioRS as may render it unnecedary to dwell fo minutely on the following examples ; and when we liave gained thefe radii for a telefcope of 30 inches focus, we have the means of making a telefcope equally achromatic and dillinft of any other length; for the ratios r : R and V : 'R, being once de- termined for crown and flint glafs of given refraftive and difperfive powers, require only to be increafed in equal quantities to fuit the foci of the propofed telefcopes, as in the fubjoined table ; and it may be proper to notice, that though 'the fpcciiic gravity has not been taken into the ac- count in the calculations of this example, yet it is ufeful as an index to point out the ratio of the fuies of incidence and of refraftion, and of the difperfive powers to be ufed, when the fpecimens of glafs are feledled by their fpecific gravities only, without an experimental trial by gnnding. The fubjoined table is fuitable for achromatic double objeft-glaffes of various lengths ; where m : n in the crown- glafs is as 1.528 : i, and in the flint as 1.5735 : i ; their difperfive powers being i : 1.524. Table I Radii of double ObjeA-glaffes in Inchei. * r R 'R V 6 1.50 2.326 2.086 4.171 12 3.00 4.652 4-171 8.342 18 4.50 6.978 6.256 12.513 24 6.00 9-304 8.342 16.684 30 7.50 11.630 10.428 20.856 36 9.00 13-956 12.512 25.027 42 10.50 16.282 14.598 29.198 48 12.00 18.608 16.684 33-369 54 1 3-5° 20.934 18.770 37-540 60 15.00 23.260 20.856 41.712 72 18.00 27.912 25.025 50.054 84 21.00 32-564 29.196 58.396 96 24.00 37.216 33-368 66.738 108 27.00 41.868 37-540 75.080 120 30.00 46.52 41.712 83-424 In this table, R and 'R arc the faces of the two lenfes which come in contaft, and r and 'r the external faces; and it will be feen that R, being a little longer than 'R, the convex face, will approach the concave one very clofely, but will not touch it, which is a neceflary practical con» difion. When the aberration exceeds 1.666, which is that of /- : R when they are each =: 1, or alike ; then r exceeds R, and the lens muft be reverfed, or put in its worft pofition ; which is the cafe in all our tables for double objeft-glaffes with the flint-glafs ; otherwife the concave would not have had fufficient aberration for the convex. In our next example it will not be necefiary to do the work at full length, but only to give fuch an abridgment as will be intelhgiblc to the reader who underftands the procefs minutely explained in the preceding example. The denfity of different forts of crown-glafs feldom varies ; but two fpeci- mens of flint can feldom be found to be ahke. The greater the denfity of flint-glafs, the more fuitable it is for the pur- pofe of making a concave lens of an achromatic objeft-glafs, becaufe the radii of both the lenfes may be longer for the fame compound refraftcd focus ; and, confequently, the fpherical aberration will be lefs than in glafs that requires fliorter radii to produce the fame compound focus. If the form of the concave had been given, the convex would have been determined by a reverfed operation, where the muU tiplier 1.524 would have been a divifor, and z a multi- plier. Sec. Example 2. — Let it be required to form a double objeA- glafs of 30 inches focal length, as before, with the fame crown-glafs for the convex, but with the denfeft flint, in which the ratio m:n n as 1.599 • '> ^""^ ^'^^''^ difperfiva powers I : 1.757 ? In this example we have 1.056 = 2 a, or the divifor for thecrown, asbefore, and 1.599 — 1x2= 1.198 I divifor for the flint ; then = -94697 ■■ 1-757 - = 1.466 1.056 'F, alfo refrafted ; and alfo 2 a, or F refrafted, and F X 'F 1. 198 "" ' ' 'F - F "~ 2.67, the ratio of the compound focal length, or what we called the rational compound focus ; confequently, the ratio between F geometrical and the compound focus is in this example i : 2.67 ; and the ratio between the re- frafted foci of the feparate lenfes, to correft the colorific rays, is •! ^ ^^ [ • With refpeft to the fpheri- ' (-94697 : 1-4663 cal aberrations, which are next to be confidered, we may in the firfl: place determine the quantities x and y, and » the correaing divifor, which is derived from them, thuB ; .834, &c. { .}' V. 946973 = .2914 = .r I ' '"" 1. 198 gives the refrafted focus of the flint or concave lens, (F geo- metrical being = 1 in this cafe,) ^ .834^ = .2408 =_)>, and — = 1-i — = z = .826, the correBixg divifor required for X .2914 this refraftive power of the flint-glafs. In the next place. -2— = 11.23 = ^ (geometrical), and 11.23 ^ '-757 = 2.67 ig.73 ^ 'F (geometrical alfo). Let us here alTume r = 9 r F -^ = R, we get inches, and then by the theorem R := 14.92, and confequently 9 : 14-92, or I : 1.66 in its loweft term*. zr — F the ratio r : R will be A double convex lens TELESCOPE. lens ground with its radii in this ratio, will have its fpheri- cal aberration = 1.325 x T ; to counteraft which, the con- cave miift; have its proper aberration determined ; and then the ratio of its radii muft be invclliaaled, that (hall make a lens ■with this determined quantity ot aberration. We have fcen alrcadythat A — 1.325 x T, therefore 1.325 x i.757=z 2.328 X 'T — 'A, the proportional aberration for F, confidcred as having the fame refrac\ive pov\'er as F ; but the correH- ing divifor muft now be applied, and — = -7> :r = 2.818 a .820 is the correfted aberration, for which the radii 'r and 'R are now to be inveiligated. By putting 'R = i, as before, and by working out the root of the quadratic arifmg from 27r' + 6rR + 7R' ratio 'R Table II. — Radii of double ObjcA-glaflcs in Inches. r + Rl^ 2.818, we fliall have tiie 3-075- And, laftly, for the aftual radi of the concave, we get, by our praftical theorem r + = F, 2 X I X 3.075 = 1.51 = 'F rational, and R '9-73 1.51 + 3-075 = 13.06 = 'R; asalfo 13.06 X 3.075 = 40-15 = 'o the fecond fide of the concave. Whence we now have r R 'R * = 9.00 14.92 13.06 40.15 29.81 [■ and F = 11.23 geometrical. > and 'F = 19.73 geometrical. according to the proper theorem. It, may be fatisfaftory to prove, that the geometrical quantities F and 'F, which we have here determined, will make , the compound focus of the telefcope, = 30 inches. But it will be requifite firft to turn the geometrical foci F and 'F into the refrafted foci, by their refpeftive divifors, 1 1.23 denominated 2 a and 2 'a, viz.. 1.056 and 1.198 : thus, := 10.634 = F refrafted, and frafted ; then by our theorem 1.056 -^-^ = 16.479 = F' rf- 1.198 F X 'F- F = *, we ha = 29. ! I = * : and if 10.634 ^ '6-479 _ 175-237686 16.479 - 10.634 ~ 5-845 the decimal had been carried farther in the geometrical foci, the compound focus would have been quite 30, as required. It may be for the benefit of praftical men to fubjoin a table fimilar to our preceding one, derived from the radii of curvature determined in this fecond example. And let it be underftood by our readers, that in all our tables for the radii of curvature, the length of the telefcope in inches is de- noted by the figures in the firft vertical column ; and that the numbers in the fame horizontal column with any given length, fhew the proper geometrical radii of curvature for convex and concave lenfes to conftruft fach telefcope. The following table is fuitable for double achromatic ob- jeA-glafTcs of various focal lengths, where m : n in the crown- glafs is as 1.528 : i, and in the flint as 1.599 : 1 ; and their iiifperfive powers as i : 1-757- r R 'R V 6 1.80 2.98 2.61 8.03 12 3.60 5-97 5-22 16.06 18 5.40 8-95 7-83 24.09 24 7.20 •1-93 10.44 32.12 30 9.00 14.92 13.06 40.15 3(i 10.80 17.91 15.67 48.18 42 12.60 20.89 18.28 56.21 48 14.40 23-87 20.89 64.24 54 16.20 26.85 23-49 72.27 60 18.00 29.84 26.12 80.30 72 21.60 35.82 3'-34 96.36 8+ 25.20 41.78 36.56 112.42 96 28.80 47-75 41.76 128.48 108 32.40 53-7' 46.98 144.54 120 36.00 59.68 52.24 160.60 Example 3. — We fliall now take the fame crown-glafs, with a flint-glafs between the two extremes, wiiich we have ufed, •viz. in which m : n is as 1.584 : i, and their difpcr- five powers as I : 1.59; and let it be required to calculate a double achromatic objeft-glafs of 30 inches focal length, as before ? Having already the divifor (2«) of the crown equal 1.056, we begin with getting that of the flint thus, 1.584— 1x2= 1.168 = 2 'a, or proper divifor; thea — = .04607 = F refrafted, as before ; and — '-^^r i.o;6 1-108 F X 'F — 1-3613 = 'F refrafted. Alfo ——— = 3. in, the rational compound focus ; and I : 3.111 is the ratio between F geometrical and *. We have x = .2914 from our former examples, and to get y, we have — — = .856 = 'F re- frafted, when 'F geometrical is = I ; therefore / .856* V , .2512 „. = .2f 12 = y ; but — = 2; hence -^ — = .b62 = %, ■> ■' ' X -2914 the correding divifor. Again, - — ^ = 9.643 = F geo- metrical, and 9.64 x 1.59 = i5-3?7 = 'F >" t'le fame denomination. In this example we will take r = 8 inches ; then, by the proper theorem =, = R, we luve Jl2<_?i64 _ ^ ,,.„ ^ ,F, and i^ = 1.515 ; con. 2 X 8 — 9.64 9.04 fequently the geometrical ratio r : R = 1 '• i-5'S- A"°i from TELESCOPE. frotn the gweral theorem of Huygens, we find A = 1.374 X T.and 1.374 X 1.59 = 2.184 x 'T = 'A ratioual, which 2.184 'A . is yet to be corrcded ; then -~ = — = 2.535, the cor- X 2 = J a = 1. 147, or a divifor for the flint ; sdfo 1.623 reded aberration. By getting the root of the quadratic arif- ing from this aberration agreeably to the general theorem, as before, the ratio of the radii '11 : V comes out i : 2.375. -— = .002 = F refrafted ; and 1.088 ' 1-147 1.415 = 'F 2r R 2 X I X 2.375 Laftly, by the tlieorem ^^-^ we get , ^ ^^^^ = I.A07 = 'F rational, and i^^^ = 10.89 = 'R, and ^^' i'407 alfo 10.89 X 2.375 = 25.864 =.V. We have, therefore, R = ^IT.} -^ ^ - 9.643- Hence the next table is fuitable for double achromatic F X 'F refraded. Again, — — — = = 3.318 =

-F „ , R 2r -F = ^ = ■'•34. and — = 1.51, or r : R ;: i : 1.51 ; hence A, by the general theorem of Huygens, =: 1.376 x T, and 'A ^1.376 x 1.623 = 2.233 X 'T = the aberration of the concave correded 3-318 Put r = 7.5 ; then obiecl-glaffes of various focal lengtlis, where m : « in the for tlie difference of refradive power. The root arifing from crown-glafs is as 1.528 : i, and in the flint as 1.584 : i ; a quadratic equation of this aberration is 'r = 2.78, when and their refpedive difperfive powers as I : 1.590. _^ ^ , 2rR Table III Radii of double Objed-^glafles in Inches. * r R 'R ';- 6 1.60 2.42 2.18 «-i7 12 3.20 4.84 4-36 10.34 18 4.80 7.27 6.53 15.52 24 6.40 9.69 8.71 20.69 30 8.00 12.12 10.89 25.86 36 9.60 14.54 13.06 31-03 42 11.20 16.97 15.24 36.20 48 12.80 19.38 17.42 41.38 54 14.40 21.81 ' 19.60 46.55 60 16.00 24.24 21.78 51.72 72 19.20 29.08 26.14 62.06 84 22.40 33-93 30-49 72.40 96 25.60 38-77 34-85 82.75 ' 108 28.80 43-63 39.20 93.J0 120 32.00 48.48 43-56 103.44 1 'R = I, confequently =; 1-47' = 'F rational, and — — - =: 9.96 :=; 'F geometrical ; alfo 9.96 x 2.78 ;= 27.68 = 'F geometrical. Thus, R = 1 1^34 I ^ ^ 9.03 geometrical. >r = 27!68 } 'F = 14-65 geometrical. Table IV Radii of double Objed-glafles, with Lenfes of Plate and Flint, in Inches. • Example 4. — Let us next take an example, in which plate-glafs is fubftituted for crown, and let the fines of the angles of incidence and of refradion in it be as 1.504 : I, while m : n in the flint is as 1.573 : i, and their difperfive powers I : 1.623 ; and let the length of the telefcope be required to be 30 inches, as before ? Then — ^^^— x 2 n = 2*7 = 1.008, is the divifor for the plate-glafs; and * r R 'R 'r 6 1.50 2.27 1.99 5-54 12 3-00 4-54 3-98 11.07 18 4.50 6.8 1 5-97 16.61 H 6.00 9.08 7.96 22.15 30 7.50 . 11-34 9.96 27.68 36 9.00 13.61 11.95 33-22 42 10.50 15.88 13-94 38.76 48 12.00 18.15 15-93 44-30 54 13-50 20.42 17.92 49-83 60 15.00 22.68 19.92 55-36 72 18.00 27.22 23.90 66.44 84 21.00 31.76 27.88 77-.5I 96 24.00 36-30 31.86 88.59 108 27.00 40.83 35-85 99.66 120 30.00 45-36 39-84 110.72 Exatr.pli TELESCOPE. Example 5 Let the ratio of the radii of the convex lens be I : 6, in which tlie fpherical aberration is a m'inimum, and let the crown and flint glafs be as in the iirfl example for a telefcope of 30 inches ? ' Then, b-y the fame procefs, there will come out R =3l!92} ^ = 9-12. as before. 'R = I2.6ol ,T- , r ''■ = 15-50 J ^ '^■^' '" Tiiis table is proper for glafs of the fame refraftive and difperiive powers as in Table I., but with the fpherical aberrations the leaft poflible. Table V — Radiiof double Objeift-glafTes in Inches, where the Convex has a Minimum of Aberration. Table VI. — Radii of double Objeft-glalTes in Inches. * r R 'R V ■ 6 1.06 6.38 2.52 3.10 12 2.12 12.77 5.04 6.20 18 3.18 19.15 7-56 9.40 24 4.25 25.54 10.08 12.50 30 5-32 . .31-92 12.60 15.50 36 6.38 38-30 15.12 18.60 42 7-44 44.68 17.64 21.70 48 8.50 51.07 20.16 24.80 54 9-57 57-45 22.68 27.90 60 10.64 63.84 25.20 31.00 72 12.76 76.61 27.72 37.20 H 14.88 89.38 30.24 43-4^ 96 17.00 102.15 32.76 49.60 108 19.14 1 14.91 35.28 55.80 120 21.28 127.68 50.40 62.00 In the preceding example, where the ratio of the two radii of the convex lens were given, r comes out =: 5.32 in a thii-ty-inch telefcope ; and in like manner, when the aber- ration only is given, the ratio of the radii may firft be de- termined by a quadratic equation, and then the other curves may be determined as they have been here, without any af- fumption of r in the convex lens. But in all cafes the re- lative refraftive and difperfive powers muft be known pre- vioufly to the calculations fuch as we have exemphfied. Example 6. — In this example let us take the fame crown and flint glafs as we did in the fecond example, atid put r = 7.5, as in our firft example ; and then the radii will be as in the following table. 1 r R 'R V 1 6 1.50 4-47 2.94 6.12 12 t 3.00 8.94 5.82 12.24 i 18 1 4.50 '3-4' 8-73 '8.35 24 6.00 17.88 11.64 24.47 30 7.50 22.34 14.56 30.58 36 9.00 26.81 "7-47 36.70 42 10.50 ■31.28 20.38 42.82 48 54 12.00 35-75 23.29 48.94 13-50 0.242 26.20 55-05 60 15.00 44.68 29.12 61.16 72 18.00 53.62 34-94 73-40 84 21.00 62.56 40.76 85.64 96 24.00 71.50 46.58 97-88 108 27.00 80.44 52.41 110.12 120 30.00 89-37 58.23 122.32 Example 7 Let us take in this example the crown and flint glafs as in the firft example, and put ;• = 9, as in our fecond example, and then the radii will come out as in the fubjoined table. Table VII — Radii of double Objea-glaffes in Inches. * r R 'R 'r 6 1.80 1.85 1.83 5.86 12 3.60 3-70 3-66 11.72 18 5.40 5-54 5.48 17.58 24 7.20 7-39 7-31 23-44 30 9.00 9.24 9-13 29.30 36 10.80 11.09 10.96 35-'6 42 12.60 12.94 12.78 41.02 48 14.40 14.78 14.61 46.88 54 16.20 16.63 16.43 52-74 60 18.00 18.48 18.26 58.60 72 21.60 22.18 2I;92 70.32 84 25.20 25.88 25-57 82.04 96 28.80 29-57 29.23 93-76 108 32.40 33-27 32-87 105.48 120 36.00 36.96 36-52 117.20 TELESCOPE. In this and the (Ix preceding tables, the radn are calcu- lated for an aperture of three inches for a focal diftance ot thirty inches ; and the optician who may ufe any of them, with fimilar glafs, may incrcafe or diminini his aperture accordingly as the focal length is greater or lefs than thirty inches. .. If we examine and compare the refpeftivc radn r and K, and alfo V and 'R of the convex and concave lenfes m the preceding tables, whlcli are all calculated by the fame pro- cefs that ii ufcd by TuUey, and feveral of which have been ufed in pradicc, we {hall' perceive that a difference in the quality of the glafs, as to difpt-rfive and refrafltve powers, makes the curves of the lenfes widely different ; and that a fmall alteration in the affumed value of ;•, the firft face of the convex lens, alfo produces a great alteration in the curves of the three other faces of the compound objeft- glafs. For inftance, if we compare the radii in Table I. with thofe in Table VI., where r is affumed equal, toz. 7. J, in both, and where the fame crown-glafs is ufed, and the fint-glafs alone taken different, the former being No. 2. and the latter No. I ; the radii in the former are /- = 7.5, R = 11.63, 'R = 10.43, ^"^ ''' = 20.86, in a telefcope of thirty inches focal length ; whereas in Table VI. there is r = 7.5, as before, but R :^ 22.34, 'R = 14.56, .-mdV= 30.58; vhich curves are very widely different. And if we compare Table II. with Table VII., in both which r is again affumed equal, as well as the crown, wiiilc the two flints are rei'erfed, viz. the former having No. I. and the latter No. 2, the comparifon will ffaiul thus in telefcopes of thirty inches focal length : in Table II. there is r — 9.00, R = 14.92, 'R = 13.06, and'r =r 40.15; but m Table VI I. r = 9.00, as before, while R is — 9.24, 'R = 9- 1 3) aid '/• 1= 29.30. Hence it is maiiifcft, that it is not only u/ele/s but detrimental to copy the radii of a double objeft-glafs of even the beft telefcope that ever was made by any artift, unlefs the refraRi'ae and difperfme powers of both forts of glafs be precifely the fame, in the given and propofed telefcopes intended to be equally good : but when different fpecimens of glafs are neceffarily ufed by different artifts, it is hardly to be expefted that both the requifite qualities of each piece of glafs will be found alike, or even fufficiently near a perfcfi: fimilarity, to authorife the copying of the radii of a ftandard telefcope, even if thofe radii could be meafured by mechanical means with fuflicient accuracy ; but the meafurement from the folar focus of a lens, as is ufual, does not afford data for obtaining the geometrical focus, and from it the radii of curvature, unlefs the quantity 2 a be previoully known ; though the converfe operation, we have before feen, is not difficult to a praftical optician. We have no hefitation, therefore, in condemning the praftice of analyfing a telefcope for the purpofe of copying it ; for it is the certain guide to irrational conilruftions ; and feldom will an inftrument fo made be free from either colours or indiftinftnefs. Neither is it fafe to copy tables, fuch as thofe publifhed by Dr, Brewfter, in his edition of Fergufon's Leftures, of which the forms are alfo given under the article Achro- matic Telefcopes, (in the Edinburgh Encyclopaedia,) until the fpecimens of glafs to be ufed are afcertained to have the^ fame refraaive and difperfme powers, as thofe from which the tables are calculated. On comparing thefe tables with the refults of profeffor Robifon's calculations, given in the Encyclopxdia Britannica under the article Tele- scope, we find not only that the bafis of thefe tables is derived from this fourcc, but that the calculations them- felves are adopted, without further modification than what ii neceffary for adapting them to given focal lengths of the compound objeft-glafs. As profeffor Robifon's article on our prefent fubje£t has hitherto been confidered to be the only article in our language that has difclofed the fteps by which an achromatic objeH-glafs may be conftrufted direftly from mathematical calculations ; it will be fatisfaftor)' to our readers that we fhould try what curves will refult from TuUey's praftical mode of proceeding, w-hcn the fame data are taken that Robifon has ufed in one of his examples. In an example worked according to Bofcovich's formula, the ratio of m : n in the crown-glafs is taken as 1.526 : I, and in the flint, fo high as 1.604 : l ; while the ratio of the difperfive powers, when converted into the proper terms, are I only in the ratio i : 1.65, or I : — ; let us fee what ' .6054 will bo the curves of a thirty-inch telefcope, when r is affumed =z 9.7, and R = 954, according to Dr. Brewller's Table VI., derived from Robifon's numbers 0.32325 x 30 = 9-6975. a"d 0.31798 X 30 = 9-5394- As r is greater than R in this affumption, the convex lens is in its worft pofition, and the fpherical aberration, Ai determined by the general theorem of Huygens, will be 1.682 X T : and as the geometrical foci of the two lenfes mufl: be direftly as their difperfive powers, and as T and 'T are inverfely as thofe foci, we fliall have 1.682 x 1.65 r= 2-775 ^'"" '^^ proportional aberration 'A uncorrefted ;. then as the correfting number, for flint of 1.599 : I, which is the molt denfe that TuUey has met with, is .826, we may take this without apparent error for that of 1.604 • ' > '^"'i 2.77 ? = 3.26 = 'A is the correSed aberration of the then .826 concave ; and according to this aberration, the root of the 2r R quadratic will give 'R : V as I : 5.40 ; and by theorem the rational focus will be 2 X 5.40 X I + R = 1.68S ; then 5.40 X I having r = 9.7, and R = 9.54, by the fame theorem we have F of the convex = 9.618, and F x 1. 65 =r 15.8697 = 'F, or focus of the concave. Alfo we have ' = 9.401 = 'R, or fhorter radius of the concave ; 1.688 and 9.401 X 5.4 = 50.76 = 'r, or longer radius of the con- cave. Lafl;ly, to obtain the compound focus ) for «/; by which procefs, we arrive at the compound focus (*) of all the three lenfes. In the apph- cation of thefe fucceUive fteps, it will be proper to attend to the figns of the quantities, where one of them, which in our cafe is the middle one, has its focus negative with con- verginsT rays. To exemplify this procefs in a triple objeft- glafs for parallel rays, let B reprefent the outermoft lens, . , m — n which we will confider as a double convex lens witli n = a = 0.53, and r and R each = 10 ; let C be the double concave of fimilar radii 'r and 'R, and with = h n -=. 0.6 ; and let D be a plano-convex, and confequently R . m — n infinite, but r = 10, as before, and = <•=« = 0.53: n then for the focus of B, putting — = a, we have — X drR drR _ drR adR + adr— Rr ~ adR— rR dr dR + dr a {adr being neglefted, when R is infinite) ; and ad— r fince d is alfo infinite with parallel rays, the expreffion be- comes — = F, as in our firft table of theorems for the a refrafted foci of lenfes, for the firft lens B. This expreffion is now put for d, when we come to confider the theorem as applied to C : here we have — = i, and the expreffion P I drR drR becomes -7- x —^, or — j-~g _; b . . .„ '■R bdr + idR — rR dr + dR- r then, as r is taken equal to R, it will be 2bd- 'F of the lens C. Now, if in this expreffion we fubftitute — , a the focus of B, for d, we have for —j—r — x 2bd— r a 2 br — r = 2br — i 2b- for >?, the compound focus of B and C, or rather, as the rays fall converging on C, and 2 3 is more than a, = -. . Again, — 2 b — a this quantity will become d for the lens D, and puttf.Tg the fame fubftitution as before, in the general theorem for D, where drR put for p, we (hall have — x drR dr + dR - dr R' :dr + cdR~ rR' or, when r =^ R^ 2cd ■ hence we obtain 2b — a lex 2b~ a — *, or 2cxr— 2b— axr 2c — 2b + a pound focus of all the three lenfes, B, C, and D. Let us take, by way of example, three lenfes as follow ; Wz. B, a double convex lens of crown-glafs, with its refraftive power by experiment =: 0.53 = a, and with equal radii, where r and R are each =: 10; let the fecond lens C be a double concave of flint-glafs, with the fame radii, and of a refraftive power = 0.6 ; and let the third lens D be a plano- convex of crown-glafs, of a refraftive power of 0.53 alfo, with R ^ io likewife ; then, according to our laft expref- fion 10 10 2c — 2b + a 2c 10 2b + c' = 25.6 = *. 3, where the image of the fun will be formed ; and if both the focal diftances and radii of curvature of all the lenfes were achromatically adjufted, as we fhall prefently direft, the image would be free from colours, and well defined. The fame determination of the foci f, , as a fubftitute for 'a. We mull further premife, that when T, the thicknefs of each lens B and D, is not confidered, we fhall fliew pre- fently that the fpherical aberration, arifing from any fingle lens that receives the rays of light, may be diminifhed as 4 : I, by the combination of two lenfes, to be fubftituted tor that one. Bearing thefe premifes in mind, we now pro- ceed to the confideration of a triple objeft-glafs, that fhall have the due corrections for both the prifmatic and fpherical aberrations. It will greatly facihtate both our explanation and exemplification, if we fuppoie the two convex lenfes B and D, having a compound focus ^^ ^, to be reprefented by a fingle lens E, with the fame focus = 1.376 = 'A .020 correfted; and — ^— = .834 = A of the fubftituted fingle 1.65 lens E, which, as before, is an impolTible quantity to be in one lens ; but this being doubled, will be 1.668 x T for the proper quantity of each lens ; or multiplied by 4, will be a proper TELESCOPE. proper quantitv for the fum of both the convex lenfcs ; then 'T being found = ..^,6. and T = .112 in each convex, we (hM have A = 1.668 x 2 X .112 = .1871 for each con-, vex, and 'A = 1.376 X .136 = -1871 alfo, for the concave, and confequently the ratio of r : R as 1. 01 : I ; then by ulniK the proper theorems, as before dn-eded, thefe radn W.11 come out r = 20.,". =>"d R = 20.37 m each convex, while the concave will have each of its radn = 16.9, as originally affumed ; and if the difperfive was great enough for the refractive power, as above fpecified, not only vyould the objea-glafs be acbromalic, but its focal length would be = 30. But we llnd the geometrical F = 10.24, ^"'^ '■'^' f,,aed F = ^J = 9-696, and r« = T^"^= "^-'"^ " , . , , 'F X F ^ . 14.107 X 9-696 _ 'F refrafted, and j^—-^^ = *, gives — ^^^ _ 9.696 - ' 3^-78 1 _ J ^.gj.y ^jj^j^. . and hence we infer, that the 4.451 difperfive and refradive powers are irrational in this calculation, and the excefs in the focal length is double the quantity with thefe two convex lenfes, B and D, to what we found it with one, in a double objeft-glafs, in our former examination. We are not however dif- pofed to depreciate the mathematical labours of a man, whofe memory «-ill always be dear to every lover of fcience, and whofe article Telescope in particular has obtained tlie enconaium of an eminent contemporary mathe- matician ; but we have felt it our duty to point out the fource of inaccuracy, which, by entering into the data, has affefted the refult of long and tedious calculations, and may have given much trouble to many, as we know it has done to fome opticians, who have attempted to copy thofe refults in praftice. The learned profeffor has indeed ftated, as he proceeds, that the value of certain appreciable quantities has been neglefted, to fimplify the procefs ; and if thofe quantities had affefted the focal diftance more, and the ratio of the radii r : R, and alfo that of F : 'F lefs, the refulting prifmatic and fpherical correftions might have been more perfeft, even with a defeft of difperfive power, than we now find them. We have not room, however, to enter farther into particulars. From Dr. Brewfter's experiments, made in his " Trea- tife on New Philofophical Inftruments," it appears that \he green ray is not always in the middle of the folar fpeftrum, and that with rock-cryllal it is at the oppoiite fide of the middle from what it is in glafs ; hence TuUey infers, that if (rlafs could be found of the fame difperfive power as rock- cryllal has, the intermediate colours might be correfted as well as the extreme colours ; and that the fecondary fpeftrum woiJd difappear. To effctl this improvement, the convex lens of rock-cryflal mull be at one fide of the concave of flint, and the convex of crown or other glafs, with equal difperfive power to that of the cryftal, muft be at the other fide. This objetl is worthy of the optician's future confideration and purfuit. ' Cekjlial achromatic Eyc-pifces We have already explained, in the former part of this feftion, how the focus of two glafles, placed at a gi-ueit dijlance from each other, may be afcertained, and alio what is the focus of a fingle imaginary lens that fhall be equal to them both in power : we propofe therefore prefently to return to the fame figure, {J!g. 8. Plate'KXlV.) in order to (hew what the advantage will be in point of diflinclnefs, which is as effential a quality in an eye-piece as power. But, in the firil place, let us fuppofe '^^fis- 1°- t^e points I, 2, and 3, fo many points of an ob- 8 jeft, of which the image is formed at F, after pafling through any lens A B ; then as the point I has rays ilTuing from it, that fall on every part of the lens, and as thefe rays are differently refraifted at different diflanccs from the axis, both towards A and towards B, there will be feveral iinages of this point at the focus F, lying contiguous to each other ; but the rays that come to a focus, after paffing in and near the central part of the glafs, will form their images very clofely together, fo as very nearly to coincide. The fame will be true of the points 2 and 3 feparately confidered, under the fame circuraflances, fo that while the fingle lens A B continues to produce both prifmatic and fpherical aberrations, there will be a confufion or indijlindnefs in the image, arifing from a promifcuous mixture of a number of contiguous and nearly coincident images arifing out ot the fpherical figure of the lens, as well as fringes of colour arifing out of the difperfion of the differently refrangible rays. This indiftinftnefs is more confiderable in a lens ufed as an objeft-glafs, than as an eye-piece ; becaufe the image formed Ijy it becomes an obje<3; to be viewed by means of the eye-piece, and therefore any diftortion, confufion, or colouration that exifts in the image, will be magnified by the eye-piece ; and the greater the magnifpng power, the greater will be the evil produced thereby. To obviate this confe- quence, which will exift partially, even when the beft com- pound objeft-glafs is ufed that art can accompHfh, the fingle eye-glafs has been laid afide, and a fyftem of glaffes fubfti- tuted, that will admit of a high power in the eye-piece, with- out a proportionate increafe of indiftinftnefs or of colour in viewing the image. The firfl arrangement of two glaffes, as a fubftitute for one, to be ufed as a celeflial eye-piece, where invcrfion of the objeft is not material, was calculated and appHcd by the ingenious Huygens, who, not aware that the prifmatic aberration could be cured by an oppofition of difperfive powers, according to DoUond's noble difcovery, devifcd the method of reducing the quantity of fpherical aberration by dimjion ; and the refult of his inveiligations was, that two plano-convex lenfes, (which have each but little aberration in their befl pofitions,) when placed at fuch a diflance from each other that their focal points, for pa- rallel rays, might coincide, would have fuch a compound focus, as would not only greatly increafe the power, but Hill more diminifh the fpherical aberration. An arrangement of this fort was put into the hands of W. Molyneux by Mr. Flamftead in the year 1686, of which Molyneux determined the compound focus, depending on the radii of curvature of the two glaffes and the diftance between them, in the man- iier we have above explained. But the firfl mathematician who gave the rationale of the advantage to be derived from a combination of lenfes, as they have reference to the fphe- rical- aberration, was fir Ifaac Newton, whofe method of explaining it Martin has given in his New Elements of Op- tics, parti, p. 27, thus: " Let NBM {fig. 9.) be the fpherical furface of a plano-convex lens N G M B ; C the centre ; C B the radius or femi-diameter taken in the axis ; A N an incident ray ; and N K the fame refrafted, cutting the axis produced in the point K. Alfo let F be the focus of parallel rays which pafs through the glafs infinitely near to the axis : let F D be a perpendicular to the axis in the point F, then will K F be the curve or difference of the focal diftance of parallel rays which are incident near the axis, and at the diftance G N, the femi-aperture of the lens. This is called the aberration of the extreme ray in longitude. Again, let any ray (fln) be incident on the other fide the lens, at the diftance b G, the refrafted part of this ray, nd, will interfeft the other refrafted ray ND in the point Q, at the perpendicular diftance Q O from the axis. This is TELESCOPE. is called the lateral error, or t}ie aberration in latitude. It is evident from the figure, tliat as the ray {an) approaches the extreme ray A M, the point of interfeftion Q will approach the axis ; and when a n coincides with A M, the point Q will coincide with the point K in the axis ; and it is as ob- vious that the point Q will coincide with F, when the ray {an), approaching the axis a B, at laft becomes coincident with it : therefore there is one pofition of the ray {an), in which it will cut the ray N D in a point Q, which will make Q O a maximum, or the greateft of all. If we take the arc Bm = B «, and B M =;; B N, the rays incident on m and M will intcrfeft in the point P on the other fide, and fo make P Q = 2 Q O ; and it is alfo plain, that all tlie rays which fall on the lens between N and M are refracted through tlie fpace PQ. Now PQ is the diameter of tlie Icajl circular fpace poffible, in which all the rays can be congregated, be- caufe there will be fome ray {an) that will meet the extreme ray N D, at the dillanoe Q O = i Q P from the axis. Hence it follows, that the circular fpace is the focus, or place of the image of an objeft, belonging to parallel rays incident on the lens N M. Further, by reafon of fimiiar triangles K O Q, K F D, and N G K, we have Q O : K O :: D F : K F :: N G : G K. But it is demonftrable, (fee Philof. Britannica, 3 edit. p. 58. art. 14.) that when Q O is greateft, then K O = J: K F, and alfo that K F is always ■§. of G B, the thicknefs of the lens ; fo then K O = 1 G B, and confequently GK:GN::-g-GB:QO, whence qGBxGN _,^ , r.^ij- ri ~ — 5-p7-i? ^ O O ; wlience P Q, the diameter of the circle of aberration, is known for any given lens. " It has been demonftrated, that the error P Q will always he proportioned to _^ ; fo that when the radius is given, the error will be .as the cube of the aiperture direftly : and when the aperture is given, the faid error will be as the fquare of the radius inverfely. It has alfo been demon- ftrated, that v/hen the convex fide of the lens N B M is turned towards parallel rays, the eiTor K F will be but ^ of the thicknefs of the lens G B, and therefore near four times lefs than in the other cafe ; for 4 G B : -J G B :: 54 , 14, which is almoft as 4 to i. " It has been further demonftrated, that the aberration P Q is as the fquare of the fine of refraftion (the fine of inci- dence being unity) in all media of different refraftive powers : thus if a lens of the fame focal diftance and aper- ture were made of glafs and water, and fuppofe thofe fines in glafs to be as m : n, and in water as 'm '.'fi; then will P O in the glafs lens be to the fame in the water lens as w' : '/?;% or the area of the circles of aberration, and of courfe the indiftinftnefs of the objeft will be as the refraftions m and 'm of the media. " Whatever has been obferved with regard to convex and plano-convex lenfes, will hold good in concave and plano- concave ones. And in both forts, it is fuppoied that all of them have the fame focal diftances, apertures, and thick- nefles, while we are comparing their refpeftive aben-ations. " Hence it is very evident, that if rays proceed from any point, as {a) at an infinite diftance to a lens N M, {Jig. 10.) the im^age of that point will not be a point, but the area of a circle, whofe diameter is P Q ; and, therefore, that point cannot be diftinftly reprefented, but will be rendered in- diftinft and confufed in proportion to the area of the faid circle of aberration in the lens, as it is the image of this circle (or dilated point) that is impreffed on the retina, and excites the idea of the point in the mind. " Hence it appears alfo, that the points in the furfaccs or fubftances of bodiej cannot be pcrfeftly and dillinaiy feen, as each of them will be dilated into a funfible area ; and luch as are contiguous, as i, 2, 3, will have their confufed images all blended together nearly in the fame fpace, viz. in the circle of aberration, the diameter of which is P Q. " Therefore the ftars, which as to fcnfe are only lucid points, \yill appear to have fome magnitude (and not as points) in the focus of the beft fort of telelcopes, even fuppofing there were no other caufe of confofion or in- diftinft vifion, befides what refulted from the fpherical figure of the lens. " Now, if tlie error from a fpherical furface, or, which is the fame thing, the indijlinflncfs of vifion, depending on, and comnienfiirate witii, tiie fpherical aberration of a lens, is as the fquare of radius inverfely ; the tli/linclnr/s of vifion, on the contrai7, will be as ihe fjuare of the radius direllly ; and, therefore, if, by means of two glaftes, we can get the view of an objeft, where the radii of the glaffes boar a greater proportion to their refpeftive apertures, than the radius of a fingle glafs of equal magnifying power does to its aper- ture ; it is evident tlie diftinftnefs of that view will be promoted in proportion to the fquare of that ratio. " For example, fuppofe (/^. 8. ) F — D = ji, or O F, to be the focal diftance of the lens G H, fo that the focus of each of the lenfes N M and G H falls on the fame point F ; then, by tlic preper theorem, we have >: = i F, <5r Q/= ^ C F : alfo, fince in this cafe we have F : ji :: * : /, therefore/^ ijr, or O/ = i O F. Now, fince we liave the fame optic angle G F O by both the glaffes, as by the fingle one E E, the ratio of the radius O F to the aperture G O, or of the radius C F to the aperture N C, is double the ratio of 0/ to O G, or of the radius Q/to the aperture E Q, and therefore the diJlinElnefs of vifion by both the lenfes h, four times greater than that by ihefwgk lens E E. " The fame thing may be demonftrated from "the confidcr- ation, that the aberration P Q is, in the fame glafs, glways proportioned to the cube of the femi-aperlure E Q, or fine ' of half the optic angle E/Q ; and that in fmall angles (as in the glafles of telefcopes, &c. ) tlie fine E O is nearly as the angle E/Q. The aberration, therefore, being as the cube of that angle, it is plain, if we make the fame angle by two refraftions inftead of one, the quantity of the aberration will be greatly leffened, fince the fum of the cubes of the parts will be much lefs than the cube of the whole ; and when the parts are equal, the fum of the cubes of each will be but a fourth part of the cube of the whole. Thus, if tlie whole angle E/Q be as 1, the cube thereof is i ; but the half is 4, the cube of which is ^, and twice that, -J- = -i, which is as the aberration arifing from the two halves, and is there- fore but a. fourth part of the whole. " This is evidently the cafe when the optic angle GfO ( = EyQ) is made by two refraftions, by the two lenfes NM and G H, fo pofited, that the focus of eacli may fall on the fame point F ; for then the angle G/O = L G/, which is compofed of the two angles LGFr=TNF=r GFO, (byreafonoftheparalleninesTN,LG, and FC,) which is the part made by the lens N M. Alfo the angle F Gyis the refraftion of the ray N G, or fecond refraftion of the ray A N ; and fince, in the prefent cafe, Of = fY, and Oy in fmall angles is equal to Gy nearly; therefore the angle G F O is equal to the angle F Gy very nearly, thofe angles being in the fame ratio with the cqu;il lines Gy and fY, when they are not large ; and the optic angle GyO = GF O -I- F Gf; confequently the aberration PQ is but a fourth part fo great by the two lenfes N M and G H together, as it is by lens E E alone. " But to render this theory general for any pofition or form of TELESCOPE. of tl.c lenff s N M and G H, it is evident, fince the aberra- tion is leffenodbv dividing the optic angle, th-^tthe AJinamJs of virion wiU be thereby promoted ; and becaufe each of the angles contribute thereto in proportion to its magnitude, the ioint effect of both parts, or angles G !■/ and /G t, will be as tiie prodiia or redangle under both, or as the redangle of the lines 0/and /F ; but, according to our former notation, T f = T - B -/; and O/-/; confe- quently F / - D/"- // will be every v^here as the diftincl- nefs of vifion by tlic t«o lenfes, above that ot a fingle lens of the fame magnifying power. " Let tlie degree of diftinclnefsthus obtained be reprelentcd by G = F/"— D/" — //; when this is a maximum, or the greateft poiTible, the Huxions thereof will be nothing ; viz. Y f— D/— 2ff= o, whence F — D = 2/; or F O = 2 O/; that 's, 0/=/F, or the angle G F/:i=/G F, in the lijl pofition ot the lenfes, as before demonftrated. " Confequently, fince in that pofition we have {hewn the diftinftnefs of vifion to be four times as great as by a fingle lens, this will be the whole effeft of a combination of two o-lalTes, and it may be fliewn that tliree glafles will produce nine times the dillinftnefs, and fo on in proportion to the fqutire of the mwilifr of gl"/" ; but then if we confider the ev.l to be remedied is but fmall, and the damage we fufrain in lojs of //?/'/ and irregularity of refraftion through fo many lenfes, we may foon make the remedy worfe than the difeafe ; and every thing confidn-ed, it appears probable that two lenfes are better than a greater number, particularly for a celeftial eye-piece." By fimilar reafoning we may explain the advantage of any other eye-piece, as Bofcovich's, when we know the radii, the pofition, and the diftanceof the lenfes that compofe it. The Huygenian eye-piece, which we have faid has the foci of the two plano-convex lenfes, as 3 : I, at the diftance of 2, with I next the eye, and the curves exterior to the eye, is peculiai-ly adapted for a reflefting telefcope that has only the fpherical aberration ; but for a refracting telefcope, though achro- matic, a little deviation from this form was found neceffary to correct the remaining prifmatic aberration alfo. On en- quiring of the beft opticians, we leai-n that the final adjuft- , inent of diftance between two lenfes, in a celeftial achromatic eye-piece, is made from trials in the tube of the telefcope it is intended for ; becaufe this diftance, and indeed the ratio of the radii of the two lenfes, wiU greatly depend on the ftate of convergence of the rays, when they are incident on the firft furface of the interior glafs ; and this ftate will depend on the focal length of the telefcope, conjointly with the aperture, and acluomatifm of the objeft-glafs : fo that it would not anfwer any good purpofeto give a table of dimen- fions, wliich might millead rather than afiift the young opti- tian in his praftice. The form of an achromatic celeftial eye-piece, compofed of two plano-convex lenfes, is repre- fented in Plate XXVIII. _^^. 13, where the diftance exceeds the focal length of the lens l next the eye, and in which con- fequently the image is between the lenfes ; which is the ufual conftruftion when the heavenly bodies are viewed without any reference to the meafurenient of angles ; but as the place of the image will vary in fome degree with a change of dif- tance, in taking terreftrial meafures, there is another fonn, commonly called Ramfden's, which is more fnitable for micrometrical meafurements ; becaufe the image, being be- yond both lenfes, (counting from the eye,) keeps its place, as it regards any fc;Je, wire, or fpider's line, that may be ufed in a micrometer : this form is given in Jig. 14. of the fame plate, and has the pofition of the interior face reverfed, fo that the plane face may be parallel to the contiguous image to be viewed : thefe two lenfes are fometimes alike, and always nearly fo, in focal length ; and the diftance between them is lefs than the focal length of either by fuch a quan - tity, that the compound focus falls juft beyond the flat face of the interior kns 2, where the image and fcale, wire, or line coincide in due adjuftment "or vifion. This form has likewife the advantage of reduced aberration, and is fome- times called the pofitfoe eye-piece, in oppofition to the otlwr form, which is therefore by fome aftronomers called the wifo'd- //iii- eye-piece. This pofitive eye-piece is alfo beft adjufted to the inftrument of which it is deftined to form a part ; and either lens may exceed the other in focal diftance in a fmall degree, as circumftances may require. When this eye-piece is ufed with a tranfit inftrument, ze- nith fe£tor, equatorial, or circular inftrument for taking alti- tudes, it is convenient to put a diagonal refleftor between the lenfes, and to have the eye -lens in the. fide of the tube, for the purpofe of taking obfervations in high altitudes, or even in the zenith. This form is feen in Jig. 15. of the fame plate, and is called a prifmatic eye-piece. The ierrejlriat eye-tuhe is that which gives an ered pofition to the objeft, as viewed in a telefcope of the refrafting fort, to which only it is apphed, though it might be applied to the Caflegrainian refle6tor with equal advantage. It has been feen that, originally, this eye-piece was compofed of three fimilar lenfes, placed from each other relpeftively at the fum of their focal diftances, as in Jig. 3. Plate XXV. In this arraugament the magnifying power is not increafed, unlefs the lens, T U, neareft to the eye has its focal dif- tance diminiftied more than the reft : but the aberration that would arife from the figure of the field-lens C D, is dimi- niftied about nine times, if we difregard their thicknefs, -Dia. as the fquare of the number of glafles employed between the image I M, and the eye at K ; confequently, the ad- vantages derived from this eye-piece of Rheita are two-fold ; for, firft, it gi%'es an ereft pofition to the objeft ; and, fecondly, it greatly diminiflies the quantity of fpherical aberration, and confequently produces a correfponding diftinctnels j but the power of this eye-piece is /imply that of one of the three lenfes. To effeft an increafe of power at the fame time that the two preceding advantages are preferved, various arrangements of three, four, and even of five lenies, have been nwde for the purpofe of conftrufting a good terreftrial achromatic eye-tube ; and the ingenuity of a Dollond and of a Ramfden has been exercifed fucceifively to accomplilh the defired objeft. Thefe arrangements, fo far as the dimi- nution of fpherical, and even of prifmatic aberration was concerned, have been underftood and explained ; but the total power arifing out of a number of lenfes differently ftiaped, and placed at different dijlances relatively to eacli other, has not been fo clearly explained ; and it fhould feem, from the manner in which fuch arrangement has been defcribed by different authors, tha,t the refult has generally been afcertained practically rather than theoretically ; which indeed muft in fome degree be the cafe whenever dow^r, or, which is the fame thing in effect, whenever aftual focal dif- tance, fimple or compound, is to be accurately determined. We will not proceed upon the intricate plan of tracing the paffage of a refrafted pencil of rays through various lenfes of different refractive qualities, and placed at various inter- vals, until they arrive at their laft focus, or place of the image of a diftant radiant body ; neither do we propofe to follow the more famihar but lefs inftruftive method of fimply giving in -figures the radii and relative diftances of three, four, or five lenfes, that fhall compofe an achromatic eve- tube ; but, avoiding each extreme, we fliall defcribe the moft improved eye-tube for erecl pofition, upon the princi- ples of a compound micro/cope, which inftrument this tube really TELESCOPE. really is of itfelf, and lliat of jjie bcft conftruftion. We have referved an account of the theory of the compound mi- cro/cope until we arrived at this article, on purpofe to (hew the intimate conneftion that it has with the refrafting tele- fcopt', which, it will be feen prcfently, is alfo the cafe with a compound refleHwg microfcope, that compofes a portion of both the Gregorian and Caflegrainian tclefcopes. Firft, let a b {Plate XXV.j^^f. 8.) be confidcred as an objeft to be magnified for examination by a compound microfcope of the fimpleft conftruftion ; let .5^/ be the fmall objcft-ffhfs, of which i is the folar focas; then as the radiant objedl a b is at a fmall diftance from the lens df, beyond its folnr or principal focus, the incident rays coming from it will con- verge flowly after paffing tiirough this lens, and confequently the conjugate focus at the other fide of the lens will be re- mote, as at A B, where an inverted image, A B, of the objeft a b will be formed ; and if the objeft is brought nearer to the folar focus j, the image A B will recede with a linear amplification, for it always fubtends the fame angle at e, the centre of the objeft-lens, that the objeft fubtends at the fame point ; it is therefore obvious, that the linear amplification of the image, compared with the length of the objeft, will be as their refpeftive diftanccs from the objeft- C e lens, -aiz. as — ; and, confequently, the farther the miage recedes, that is, the nearer the objeft is brought towards the folar focus i, the more it will enlarge, which prin- ciple is the bafis of both the magic lantern, and folar as well as lucernal microfcope. Let us call the ratio of the objeft to its image i : 5, as in our figure ; then if D F be a double convex eye-gb.fs, placed fo that this image, A B, may be in its principal focus, the rays of light coming from it, now confidered as a radiant, will, by paffing through this ler.s, become parallel, in which ftate they will enter the eye at I, and after converging to a new focus on the retina, will there make a pifture of the image of the objeft, but in a reverfed pofition. The principal pencil of rays coming from d and / of the objcft-lens, will meet at C, the centre of the image, and diverge till they come to the eye-lens D F, where they are made parallel, and where they define the fize of the eye-hole in the cap of the eye-piece; while the angle of vifion will be G E H = B E A. In this fituation, the image A B is magnified by the eye-glafs in- verfcly as its focal diftance, that is, as many times as F C is contained in ^ C ; for the vifual angle B E A, fub- tended by B A, exceeds the angle B e A, fubtended by the fame line B A ; and, confequently, its oppofite angle b e a, fubtended by the objeft, is in the ratio of C ^ : C E ; and alfo, when C E = r c, in the ratio of C e : c e ; and the whole amplification wrill confequently be by compounding C e' the ratios = pc-= . But in this conftruftion the field CE X ce of view is fmall, though the power is great ; and the colo- rific efFeft of the prifmatic aberrations, as well as the indif- tinftnefs and diflorfion of the figure of the objeft, are fully experienced. To do away thefe impediments to a pleafing view of the objeft, a fecond lens was introduced into the eye-piece, as M N, in ^^. n. Pto XXIV., the original intention of which was, principally, to enlarge the vifible area, or circle of vifion, which it did effeftually, while, at the fame time, it diminithed the power, and in fome meafure the fpherical aberration, though the latter advantage does not feem to have been contemplated ; and in this ftate the compound microfcope remains in the prefent ordinary con- ftruftion, one of the three Icnfes, df, being the cbjeS- Icns ; the fecond being the amplifier M N ; and the third the Vol. XXXV. eye-glafs G H. Now if we compare the compound celcf- tial eye-piece in fig. 8, before difcribcd, at having llic fame power with the fingle imaginary lens E E in the fame figure, we fhall fee that the only difference in tlic two arrangements is, that the image in Jig. 11. is between the Icnles, but in Jig. 8. beyond them both. We have di-monftratcd the advan- tages of the co:nl)ination in^"^. 8, and have (liewn that thofe advantages will continue, if the image be formed between the lenfes ; and alfo that making th." diftance between the glaffes to exceed the focal diftance of the eye-glafs, will bring the imaoje into this intermediate fituation, as is aftually the cafe in the bcft achromatic telefcopes, with both the celeftial and terreftrinl eye-pieces ; particularly when the wire, or cob- web micrometer, is not ufed. If then we confider the ob- jeft a b mfg. II. to be the fmall m primary image of a dif- tant objeft, formed in the focus of the achromatic objeft- glafs, the image A B will become the image of an image, or fecondary image, in a contrary' pofition ; and this is the one aftually viewed in the teiTcftrial tube of a teleCcope. Let us in the next place conceive the terreftrial tube to have only the three glalTes that compofe the arrangement of the compound microfcope, and it is obvious that the image a b will be rendered as diftinft, and as much enlarged in it, as the objeft a b, of fimilar dimcnfions, would be in the like compound microfcope. Thus have we a terreftrial eye- piece with an arrangemer.t of three glaffes, which magnifies greatly, and, fo far as the pair of eye-glaftes are concerned, is achromatic ; but with refpeft to the objeft-lens ■ + d; therefore we have as / : z :: d : d + r ; and by compoiition of ratios,/ -f 2 : /:: zd + r : d ; hut f + z = r -.■ r : f :: zd + r : d; then by multiplying the extremes and means together, we have the equation dr = 2 r//" -f fr, and dividing by zd + r, there refults the theorem — ; = f — EF. This may zd ■\- r ■" ' be confidered as the fundamental theorem in catoptrics, from which the focus may be determined in any fpeculum, con- cave, convex, or even plain, whether the rays fall on it diverging, parallel, or converging ; and from a due variation of the fymbols and figns, as the cafe may require, we have all the variety of tlieorems for finding the focus contained in the fubjoined table. Table for finding the Focus of Rays refledled by any Speculum. « Rays. Convex. Concave. Diverging 2^+ r ^ zd-r ^ Parallel - - T=/- ^=/- Converging -dr dr -zd + r"^' -zd-r ■'' To illuftrate the utility of this little table, let it be re- quired to determine the refpeftive foci of two fpecula, both ground and polifhed, on tools of 30 inches radius, when the radiant objeft is placed at 300 feet diftance, one fpe- culum being convex, and the other concave ? In the firft place, as the diftance is lefs than infinite, the rays will come diverging from a luminous point ; and, therefore, with refpeft to the convex fpeculum, we muft ufe the theorem — = /, which m figures will Hand thus, — — zd ■{■ r ■' ■ ^ 2X 300 -I- 2.5 E= -— — = 1.245 f^^*' °'' '4'94 inches for the required 602.5 foeus ; but for the concave fpeculum, the theorem — zd — r ^ /"(or — f, becaufe the focus and centre of the curve are on the fame fide of the fpeculum) will give us thefe numbers, 400 X 2.5 750 r -^ i — = — i- — = 1.255 leet, or 15.00 2 X 300 - 2.5 597.5 inches for its focal diftance ; and in hke manner may the proper focus be determined for any other radius and diftance, however the rays may be circumftanced when they fall on the fpeculum : whenever they come converging or diverging from a firft to a fecond fpeculum, the focal point, real or virtual, muft be confidered as the radiant, and its diftance reckoued accordingly. Thefe theorems, however, imply that the fpeculum is already made, whereas in many praftical cafes, the focus is firft afllimed, and the proper radius of convexity or con- cavity is required, or, which is the fame in efieft, the radius «f the tool is required that (hall be proper for forming the requifite curve. For inftance, let it be required to form a tool of fuch a radius, that an image of any very remote objeft may be formed, by a fpeculum ground and polilhed to its dimcnfions, at the didance from its rcflefting forface of juft 18 inches ? In this cafe, the rays muft lie confidered as parallel, becaufe the objeft is remote ; and, indeed, it i( always for a remote objeft that the curve of a large fpe- culum is formed ; confequently the theorems — = /, and — r —— = y, or — /, will be fuitablc for the required purpofe, in both which 2/ = /• ; therefore 18 x 2 = 36 will be the proper radius of either the convexity or concavity of the tools to bo ufed. If the ray had been diverging, and the fucui ajirmallvc, or behind the fpeculum, for a convex fpeculum the theorem arifiiig from transformation would have been . = r ; and for a concave — . d-f f-d in the cafe of a negative focus, or focus before the fpeculum, , = r : but the former would have been zdf zdf 'i+f = r, and the Utter -—, -J. = r. In like manner, the diftance may be deter- mined from the radius and proper focus being given ; for, fuppofing the focus affirmative, with a convex fpeculum, the transformed theorem for diverging rays will be — — =: d, r- 2/ and with a concave fr z/+ r negative, the former will be = d: but when the focus i« i— . = d, and the latter r + 2/ 2/- d. Hence, when any two of the terms/, r, and icnts, reprefents a fcftion of this mftru- ment as it was originally made, ixiAjig. 2. is a reprefentation agreeably to its improved modern conftruAion; in both which we (hall ufe the ffame letters of reference to the correfponding parts. A B C D, in each figure, denote the tube of wood or brafs in which tvfo concave fpecula are contained ; the large one, B D, is perforated at the centre, and placed con- tiguous to the interior end of the tube, but in luch a way as to have a little play when preffed by a circular fpring be- hind it ; E F is the fmall fpeculum, which is sf (hotter radius than the fpeculum B D, and has its centre placed exaftly in the centre of the tube oppofite the central aperture in the large fpeculum, and is fo adjufted by the fcrews behind it, that the image of the large fpeculum forms a concentric circle on its reflefting furface, when viewed by an eye fitu- ated in the central hole of the large fpeculum. In this in- ftrument, as in the refradting telefcope, it will be moft con- venient to defcribe firft the formation of the primary image of a diftant objeft in the body of the tube, and then the microfcopic means applied for nrr;dering this image vifible in an apparently magnified ftate ; for in truth there is aftually a compound refleHlng micro/cope made ufe of as a confti- tuent part of this inftrument, in hke manner as the terref- trial tube of a refrafting telefcope of the beft achromatic conftruftion, is in itfelf a compound refratilng micro/cope. In the firft place, agreeably to the laws of catoptrics, which we have explained, if we confider a b and c d two rays of light coming from the centre of a diftant arrow in a ftate of tiivergence approaching to parallelifm, and impinging on the large fpeculum at the points k and d near the remote edges of the fpeculum, and at equal diftances from Us axis, they will be refleftcd inwardly fo as to meet at the point e, in the common axis of both the fpecula, and will form the image of the central point of the arrow ; and in hke manner, any number of rays proceeding from the oppoGte ends of the faid arrow may be conceived to fall on the fpeculum, and to be reflcaed to the points h and i, and to all the int.rnicdialc pomts, fo as to form a perfect image hei in an inverted po- fition, becaufo the r.iys which enter the tube from the right- hand end of the arrow, will after refledion crofs the axis, and form the left-hand end of the image, and -vice verfd. When an image is thus formed, if it could be viewed, under fufficiently favourable circumftances, by an eye placed in the vertex or central aperture of the large fpeculum, it would fubtend the fame angle as the objea itfell fecn from the fame fituation, as we have already demonftraled ; and therefore the length of the image will bear the fame propor- tion to the length of the objed which it reprefents, as its diftance from tlie eye, or vertex, is to that of the objea ; fo that the longer the radius of the fpeculum which forms the image, the more diftant, and confequently the longer will this image be, as compared with the objeft ; and lor the fame realon, the nearer the objeft, the longer will its image be, until the fituation is at the centre of concavity of tlie fpeculum, where the objeft and image will coincide, and appear of like magnitude, but in contrary pofitions. This formation of the primary image being underftood, we muft in the next place confider it as a real microfcopic objeft, placed fomewhcre between the face of the large fpeculum, and its centre of concavity, which fituation will always depend on the diftance of the real objeft itfelf, or, which is tile fame thing, on the degree of divergence of the incident rays coming from the objeft. Now if the fmall fpecuUm were fo placed as to have this primaiy image, or microfcopic objeft, in its folar focal point, the rays coming from it would be reflefted towards the large fpeculum in a parallel ftate ; and palling through the central opening of the large fpeculum, would never converge fo as to form a fecondary image, in which cafe the conjugate focus would be faid to be infinite : and if the faid primary image were nearer to the fmall fpeculum than its folar focus, the re- flefted rays would diverge fo as not to reach the central hole of the large fpeculum at all ; but if the diftance of the primary image h e i exceeds the folar focus of the fmall fpeculum E F, which is at the point /, then the reflefted rays coming from the primary image will converge to a conjugate focus fomewhere in the axis, and form ajeconjary image, the magnitude of which will incrcafe with its diftance from the primary image, which we now confider as a real microfcopic objeft. The place where this fecondary image will fall, will depend on the diftance of the primary image from the folar focus of the fmall fpeculum; and a fmall change of this diftance will caufe a great correfponding change in the place of the fecondary image, or conjugate focus ; fo that an adjuftment for a fmall forward and back- ward motion of the fmall fpeculum, by means of a fcrew at the end of a long rod placed parallel to the tube, and reaching to the eye-end, will fufficc for regulating the place where the fecondary image ftiall moft conveniently fall to be viewed by an eye-glafs. The fecondary image has its pofition reverfed, as it regards the primary one, and is there- fore in the fame pofition as the objeft itfelf, or what is ufually called enS, in oppofition to inxerud. This fecondary image was originaDy made to fall within the tube, as at k I, m the focus of the eye-glafs G H, through which it may be viewed by a fmall hole at I, where the vifual angle GIH TELESCOPE. G I H is now confidfrably enlarged. In order to explain the theory of this reflcding compound microfcopc, eom- pofcd of the fmall fpeculnm E F, and eye-glafs G H, more particularly, which we purpofely omitted to do under the term Microscope, let us fuppofe a ray of light proceeding from the end h of the microfcopic objeft, or primary' image h e i, and falling on the central part of the fmall fpecalum at jf, it will return reflefked from this point, fothat the angle of refledion on the other fide of the axis or line g e, will be equal to the angle of incidence on this fide, and will there- fore return in the line g e I, to the place of the conjugate focu^, where the point h will be depitled at /: alfo a ray coming from the point t of the fame primary image, and falling on the point g, will be raflefted in a fimilar manner along the line g h i, and will form the point ;', at /', in the •fecondary image, which we have reprefented by a dotted line. Now as the primary and fecondary images are fub- tended by the fame angle hgi, or i g /, at the vertex^ of the fmall fpecuUim, agreeably to the laws of cstoptrics, it is cvideait that the linear magnitudes of thefe two images will be direftly as their refpeclive diftances from g, the vertex of the fmall fpeculum ; therefore, as often as the diftanee g h is contained in the diftance g i, er the diftance g i in the diftance^/; fo often will the length of the fecondary image k /, exceed the length of the primary one b I. But this fecondary' image i t is viewed tlirough the eye-glafs G H, under the vifual angle G I H, and is faid to be again magnified thereby : let us next fee what is the amount of this amplification ; we have already faid that an eye at the vertex g of the fmall fpeculum, would view both the primary and fecondary images under the fame vifual angle hgi or kg I; but by an eye at I, the vifual angle is G I H ^ i K /, becaufe / K is parallel to H I, and i K to G I ; and i / is the common fubtenfe of both angles ; confequently, as the diftance L K, or focus of the eye-glafs G H, is to the diftance of L g, or diftance of the fmall fpeculum from the fecondary image; fo Js the apparent magnitude of the fecondary image, or vifual angle to the eye at g, to the fame with the eye at I ; and if the diftance ^ L be that at which an objeft may be beft feen by the naked eye, the whole gk power of magnifying of fuch microfcope will be = ^—: x gL, j=-|r, provided that f> i be confidered as a real objeft under microfcopic obfervation. But in a telefcope, the fize of h i has a reference to the diftance of the objeft which it repre- fents, and this circumftance muft be taken into confideration in eftimating the power of the Gregorian telefcope. When the eye is placed at o, the vertex of the large fpeculum, we have faid, that the objeft and its primary image are feen Hjider the fame vifual angle ; therefore, wherever the primary image may fall in the line of the axis, the angle hoi will be to the angle G I H, or kK I, as the objeft feen by the naked eye is to its fecondary image, as feen through the eye-glafs, and confequently the latter, divided by the former, will give the power. But the vifual angles h o / and it K L are to each other in the compound ratio of — x — —, eg L K which formula, exprefl"ed in meafured diftances, will be more convenient for afcertaining the whole power of a Gregorian telefcope, than the ratio of the vifual angles, which would require previous calculation. For inftance, let o t, the dif- tance of the primary image from the great fpeculum, be given — 24 inches ; and eg, the diftance of the fame from the fmall fpeculum, be = 3,3 ; alfo let L j-, the diftance of the 9 thing, fecondary image from the fmall fpeculum, be = 25. y, and I- K, the focus of the eye-glafs, be = 2.3 ; then we fhall have, agreeably to our formula, — - x -— , or, which i« the 24 X 25.5 612 n ^ r , r =^-^ = = 80.0 tor the power ot Vi X 2-3 7-59 fuch a telefcope, when direfted to an objeft at fuch a dif- tance as (hall make the primary image fall as we have taken it. For objefts very near, the focus of the large fpeculum will be long, and confequently the primary image will .ipproach the Imall fpeculum as the diftance decreafes ; for which rcafon, the magnifying power will increafe with the diminution of diftance, and vice •uerfd ; fo that the power with parallel rays, or when the telefcope is ufed for celeftial purpofes, will be the fnialleil polTlble, and yet this is what is ufually called the power of the telefcope, which circumftance fhews the impropriety of taking the power of a large telefcope from a meafure of a near terref- trial diftance, which mode has been praftifed by eminent aftronomers, and recommended by men of fcience. If, how- ever, a correftion is applied for the want of parallelifm in the incident rays, as we fhall liave occafion to do prefently, then the power may be as accurately obtained at a ftiort as at a long diftance. In the old conftruftion, which our Jig. i. repre- fents, the piece of bent brafs at r, which fupports the fmall fpeculum, is afted on by the long rod /C, that has a milled nut at /, and a fcrew cut on the end C, that draws the pro- jefting part N, of the piece c, along a (lit made in the tube, while a contrivance in the cock M prevents the rod M N from advancing or receding as the rod revolves. Hence the eye-glafs G H remains fixed, and the adjuftment for diftinft vifion is made by the rod M N moving the fmall fpeculum to its proper diftance from the primary image h i ; and in this way the fecondary image may be made to reft in any given fituation beyond or (hort of the point L, fo that various eye. glalTes may be ufed with the fame fpecula in fuccelTion ; or different fmall fpecula may be ufed with the fame large one, from which changes a variety of powers may be had with fixed eye-glaflfes ; but if the eye-glaffes be inferted into a fmaller fliding tube, there will be a third method of varying the power, by bringing the fecondary image into the Aiding tube out of the body of the large tube, fo as to increafe the diftance L g, which is one of the faftors of the dividend in our formula. Thus, whatever may be the arrangement of the fpecula, eye-glafs, and diftance of the primary image, when any three out of the four terms of the formula are given, together with the whole power, the fourth may always be had by a fimple calculation, which is a matter of great coHt venience to the maker. If, for example, we take the power 80.6 = P, and the radius of curvature of the large fpeculum =: 48 inches, in which cafe the primary image with parallel incident rays will fall at — = 24 ; and let L ^ and eg be refpeftively 25.5 and 3.3, to find the focus of the eye-glafs that fhall produce fuch power ; we fhall have 24 X 25.5 3.3 X 80.6 z= 2.3 for the focus of the eye-glafs ; or for the diftance eg of the primary image from the fmall fpeculum, when ihq eye-glafs is given, we fhould have — -i-^ — 3.^, asbe- ' " ^ 2.3 X 80.6 ^ ^ fore. But it was foon found, that a fingle eye-glafs not only produces fringes of colour near its edges, arifing from the prifmatic abeiration of the rays coming from the fecond- ary TELESCOPE. ary image, now confidered as a real objeft, but that the field of view is thereby circumfcribod into a fmall area. For thete reafons,the Huygonian eye-piece,already explained, was fuhftitutcd for the fiiigie cye-glafs, whicli fubllitution left little more to be done, in the way of the improvement of the Gregorian telefeope, except wliat related to the conilrudion ot the fpecula, which have now been brought nearly to a Hate of perfection, as we have explained, at fome length, under our article Speculum. We have introduced Jig. 2. for the purpofe of explaining more clearly, than we could by a mere verbal defcription, the plan of the Gregorian tele- feope in its mod improved Hate, in which, we repeat, the fame letters indicate the fame parts as in ^^. i. In tliis figure we have made the pencils of rays a b and cd to confill each of three lines, for the purpofe of flicwing how the image is formed at the jjoints of convergence after refleftion, and alfo how the inverfion of the image is produced by the erod- ing of the pencils before they converge to a point at each end of the image. It may alfo be feen how the rays pafs through the interior eye-glafs, before they form the fecondary image between the two glaffes, as in the achromatic altrono- mical telelcope, thereby conftituting this image a cata-dioptric one, which before was a catoptric one, according to our defi- nition. The Huygenian eye-piece is peculiarly adapted for the Gregorian telefeope ; and when the fpecula have their curves fo adapted as to counteratt each other's aberrations, as we before recommended, and are alfo well poliflied, as well as of fuitable metal, a very high power may be applied, and the light by refleftion will be to that by refraftion alone nearly as 5 ; 8, where the apertures are equal ; but as a refleftor is capable of having a much greater aperture than any refratior that can be conflrufted, it will have a proportional advan- tage in the eflential quality of illumination combined with power, on which union its excellence depends. It will not be neeelFary to repeat here what we have faid above rcfpeft- ing the manner of determining a fmgle eye-glafs, equal in power to the combined eye-glafles in the Huygenian eye- tube ; but it may be proper to mention here, that fuch a glafs, when determined, mud be fubftituted for the com- pound eye-piece, in computing the power of the telefeope according to our preceding direftions. The diaphragm that precludes the ftraggliug and extraneous rays from coming to the eye is put where the fecondary image is formed, and the aperture at the eye is obliged to be fmall in this conftruftion of a telefeope, to prevent any other light being admitted into the eye than what is reflefted from the fmall fpeculum, and is necefTary for the formation of the fecondary image. When the diameter of the fmall fpeculum, and alfo the exaft fituation of the primary image, are known, the aperture at the eye, that (hall admit the principal pencil, may be exaftly determined by the fubjoined analogy ; ii/z. as the dillance of the fmall mirror from the fecondary image, is to the focal length of the nciu-eft: eye-glafs ; fo is the dia- meter of the fmall fpeculum, to the necelTary aperture at the eye. And to find the proper diameter of the fmall fpecu- lum, or central aperture of the large one, the proportion will be, as the diftance of the primary image from the large fpeculum, is to its diftance from the fmall one, with incident parallel rays ; fo is the diameter of the large fpeculum, to the diameter of the fmall one, or of its ovin central aperture ; and Vi'hen this proportion is preferved, all the n fletted light will enter the fmall tube that contains the eye-glalfes, and alfo the extraneous light not falhng on the larg- fpeculum, if any, will be excluded. Lattly, (hould the field of view be required to be equal to a given vifual angle, inch as that fubtended by the diameter of the fun, this will depend on the pDiuer of the inllrument, which for this purpofe mull be limited, as in the following example : let a reflcAing Gre- gorian telefeope of four inches diameter of the large fpeculum, and 17.5 inches focus, witii a hole in the centre i.i diameter, (which lii confidered in praflice a good proportion,) be required to have a field of view ju(l 32', when the focus of the eye-glafs is two Inches ? The thing required is, tlut the enlarged fecondary image of the fun (liould juil fill the aper- ture in the centre of the large fpeculum. The fi/.e of the primary image of the fun depends on the focal length of tlic large mirror, and mud firil be found : it has been afcertained tliat, in the focus of a fpeculum (or lens) of fix inches focal length, the image of the fun is .05586 diameter, when he meafures 32'; therefore, as it will be proportionably more in a longer focus, fay as 6 : .05586 :: 1 7.5 : .1629 ; alfo, ai often as this image .1629 is contained in i.i, the diameter of the hole in the large fpeculum, which quotient is = 6.75^ lo much docs the fmall fpeculum magnify the primiry image, in converting it into a fecondary one of 1 . 1 diameter. Again, if we divide the focus of tlie great fpeculum 17.5, by 6.75 — I, we have 3.04, the diftance of the primary image from the fmall fpeculum, which is fomewhat more than its folar focus ; and alfo if we divide 4, the diameter of the large fpeculuni, by the fame (6.75 — i), wo (hall have .695 =: the diameter of the fun's image on the face of the fmall metal, while the fecondary image will juft cover the hole of the large fpeculum, as required. Now, laftly, to find what is the power of the telefeope under thofe limit- ations, we have 17.5 x 6.75 = 118 for the hrft part of the , 118 , , , power ; then - — = 59 = the whole power, when 2 is the focus of the fingle eye-glafs. ■ If the length of the focus of tlie principal fpeculum were iiicreafed to 30 inches, or even to 30 feet, while the aperture remains as before, no advan- tage would be gained in this conftnidion from fuch length ; for in the cafe of 30 inches focus, the primary image would be .2793, and the power of the fmall fpeculum only 3.93 f ], while the diftance of the primary image from the fmall fpeculum would be 10.24 ! l'"" diameter of the image on the face of the fmall fpeculum 1.36 ; and the magnifying power i-^ = 59, as before. There would, indeed, be 2 this difadvantage, that, as the fmall fpeculum has an increafed radius here, its diameter will necelfarily be fo much aug- mented, as to intercept feveral of the beft rays of light, which are thofe that fall near the centre. The opinion, con- fequently, that a Gregorian telefeope will be improved by having a long focus of the great fpeculum, with the fame aperture, is erroneous. When two refledling tclefcopes per- form alike, as to light and diftinftncfs, the fquare fquare roots of the diameters of the fpecula muft be as the cubes of their foci refpeflivcly. There can always be more power got by the fmall fpeculum and eye-glafs, in even a (hort tube, than the aperture will bear. The theory of Caflegrain's telefeope is very fimilar to that of the Gregorian, the principal difference being that, in Caflegrain's, the fmall fpeculum is convex inftead of con- cave. When the radii ot the two fpecula and the eye-piece are rcfpecSively the fame in each conftruftion, tlie powtn will he the faine, though the apparent pofilion of the laft image, which we have (hewn to be ered in the Gregorian, is inverted in the Caftcgrainian conftrudtion ; for on exa- mining Jig. 3, which explains the courfe of the rays in Caflegrain's telefeope, it will be feen that the incidei.t rays ab and cd, after being refieiled from the large fpeculum^ arc TELESCOPE. are prevented from coming to a point at the virtual image hi, behind tlie fmall ipeculum, in confcquencc of its mter- pofition, but are again rtflcftcd towards the eye m a ftate of lefs rapid convergence, tiU, falling on the lens G H, they are rcfraaed to a focus at L, and form the real image K/, which may be coniidercd as the primary image, and is, therefore, not in the fame pofition as the fecondary image, which is formed in tlic Gregorian tclefcopc after the rays have crojfd each other. When the rays fall on the large fpeculum, they are refleaed in a ftate of convergence to- wards the fmall fpeculum, becaufc coming from a diftant objea ; and they enter the tube either parallel or diverging, accordingly as the objeft is more or Icfs diftant ; but they fall on tiie fmall fpeculum converging, fo as not to become quite parallel after the fecond refleftion, but flowly con- verging ; and the quantity of convergence will depend on the diftauce of the virtual, or what may be called imagmary focus, or image h i, from the fmall fpeculum E F, which is here between/, the folar focus, and the convex fpeculum ; whereas in the Gregorian inftrumcnt, the folar focus / is between the concave fpeculum and image hi. In both conftruftions, — X v-^ is the meafure of the power; eg L K. and it is evident that the part .p-^ is the fame in both ; but it is not equally clear that — is the fame, or in the fame ratio in both. The diftance og between the two fpe- cula is lefs in CafTegrain'e inftrument than in the Gregorian, by twice the folar focus of the fmall fpeculum, and by fo much may the principal tube be (hotter ; therefore, it re- mams to be proved that ge is to _g-o in one telefcope as ^e is to go in the other, though differently pofited. In order to prove this analogy, let HD {Plats XXVl. jig. ll.) be a concave fpeculum, and E C a convex one, both de- fcribed with the fame radius C D, and on the common axis BCD; and let the point N interfeft the radius, fo as to become the folar focus of each fpeculum, one really, and the other virtually. Let F be a radiant point, from which the ray F H is incident on the concave mirror at the point H, OP to which the ray K E incident on the convex fpe- culum is tending : then both thefe rays will be reflefted from their refpeftivc fpecula to the fame point B in the axis, and will pafs in the fame line E B. Again, let C F be an objea, and the image thereof ah, formed by the con- cave, will be equal to the image A B made by the convex. This may be proved from our preceding theorems for con- vex and concave fpecula refpeftively, w'c. — -7 ^ /, J, when all the figns are changed. and -dr dr 2 d— r r — 2d For as // = F C, C 3 :=y"in the convex ; fo in the concave, let F D =: t , and D B i:^ (f ; and then we have in the former d : f :: 2 d -\^ r : r, and in the latter J : (p :: r — la : r. But J = (/ -t- r, therefore 2« ^= 2 d -\- 2r, whence r — 2l=-2d-rr; confequently d : f :: I : '^ ^" open tube, which is fometimes made, by par- ticular defire, to receive at its end L the eye-piece, now fcrewed into the tube I K at K ; and then, as the empty tube L Aides in the tube I K, the diftance between the pair of field- glaffes and pair of eye-glafles may be varied at pleafure ; and as the magnifying power of the coinpound microfcope varies direftly with this diftance, it is evident that the power of the telcfcope thus conftrufted will vary in like manner. But we have fliewn above, that the power of the telefcope may be varied alfo by varying cither the pair of field- glafles, or thepair of eye-glaffes ; hence, when a great variety of powers is dcfired for the fame inftrument, different pairs of field and of cye-glafTes may be adapted to the fame ter- teftrial tube with very little additional expence ; and mjig. 4. we have given three different pieces of fliort tube, containing male or female fcrews, or both, which are called adapters, by means of which the celeftial eye-pieces may be adapted as eye-pieces to the terreftrial tube, fo as to gain a great increafe of power for particular purpofes. When the adapter M, in_/f^. 4, which has both a male and female fcrew, is fcrewed into the end K, of the terrellrial tube mjig- 2, the celeftial piece W.,Jig. l, may be fubftituted for the pair of eye-glaffes belonging to this long tube, whenever occalioii may require ; or the pair of terrellrial eye-glalfes may be made a celeltial pair, on occafions when a low power and enlarged field arc wanted. The adapter O, in f>g. 4, has two dlffimilar female fcrews, the fmaller one of which fcrews upon the long tube at the end I, while the larger end receives the outer end of the celellial ej-e-piece H, in_/f^'. 1, and converts it into a pair of field-glaffes, for which it may be fubftituted, to get the great-'ft jKjflible jiower, with a high magnifier alfo at the end K, or rather at L, with the fliding eye-tube ; and in this way the power may be increafed fo much, that all light will difapjiear, and tlie inftrument, con fequeiitly, will tlien become iifelefs : but it is better to have .idditional ])alrs of proper rKld-glan"es, than to fubftitute eye-glaffes for this purpofe, b.-eaufe the arrangement of the focal diftanccs of the lield-glafl'es is different from that of the eye-glaffes, when they arc arranged in the beft manner, as we have explained under our laft feition. The adapter N hai two male fcrews and a female fcrew, one of which male fcrews will lit the tube at H,/?^. I, and the other the tube at K,/[f. 2, or \.,Jig. 3, and the fcm-ile fcrew will receive Troughton's micrometer in either place, or any eye-piece having a mother- of-pearl micrometer, even though it may belong to another teleleopc. Thus the adapters, which are limple in their con- llrui^'tion, of little expence, and very portable, afford a variety in the ufe of a telefcope, that is at the fame time both ufeful and entertaining ; and we have been the more minute in our defcription of them, becaufe they have never before been brought into public notice. The powers of this telefcope ufually vary from 25 to 100 without the adapters, as they are made by opticians ; and opticians are no advo- cates for adapters that increafe the powers tao much ; but for certain purpofes the power may be .lugmented to about 120 with diilinftnefs and tolerable light ; but then it muft be recoUefted, that the field of view will admit of only a fmall object, as well as little light, when the power is aug- mented out of due jiroportioii. Fig. 6. is a reprefenlation of a live-feet achromatic refrac- tor, mounted in the moll ufeful and convenient manner for making either celeftial or terreftrial oblervations, and has all the appendages which we have juft defcribed as belonging to the thirty-inch refraftor, when made in the beft manner. A B, as before, denote the main tube, which has a dia- meter of 4-I inches ; and inftead of one fet of fliding con- centric tubes, here are two, inferted into the cocks P and P, of a three-legged Hand of mahogany, of which two legs only are feen in the figure, and thefe Ihortened, fo as to fall within the room allotted them in the plate. The conftruc- tion of this ft and has been defcribed under the article Equatorial Stand, with a reference tojfj. 5. Piatt XIII. of our prefent feries of jjlales ; therefore we ihall fatisfy ourfelves with fuch a fliort defcription of the conflituent parts here, as will limply enable the reader to underftand their ufes. The nulled nuts (J and R, attach the main tube A B to the wooden ftand ; and the tubes A P and A P keep it Heady from vibratory motion : the femi-circlc of brafs between Q and R, moveable about its centre, is racked at the concave part of its circumference, fo .is to fit the fcrew on the axis of the handle U, which we have m.ide fhort, to avoid confufion in the figure ; therefore, when the fcrew is preffed clofe into the notches of the rack-work, a revolution of the handle U, in either direclion, will produce a correfponding motion, in elevation or deprcflion, in the telefcope borr« by this fcmi-circle, while the vernier and divifionsoii the face of the femi-circle indicate the quantity of elevation, when zero is properly adjufted. The manner in which this mcchanifm adis, and alfo the method «f M m 2 producing TELESCOPE. DroancinE Wi/ontal motion, will be bed underftood Ln, an cxumination of /^ 7. --h.ch t"e parts^e en larged, and in wl.icl. the fame letters denote the fame thines. The thumb-fcrew V, concealed m /^. 6, when turned round, prttTcs on the fixed meta3 under .t and draws up the frame Y, of wh.ch one fide is feen, that holds the aNis of the fcrew U, and that turns on two pivots at its remote end X ; and in this manner the fcre^v is brought into contaa with the notches of the racked femie Jide of the tube near its mouth, when the finder has pointed the tube properly to its objed. This Hand was contrived by fir William Herfchel, whofc experience in the uie of vai-ious Hands directed him to prefer one that is not hable to propagate vibratory motion to the large fpeculum, and that has a point of fup- port near the upper extremity of the tube. We have, how- ever, feen a fix-feet refleftor very fteadily fupported on a frame fimilar to that exhibited in Jig. 2 ; and the com- pofer of the prefent article has a Caffegrainian telefcopc, with a tliree-feet tube, fixed between the cheeks of one of the doors of his obfervatory, which turns round witli the moveable dome in azimuth, and which elevates in altitude on two pivots relling in the notches of a pair of brafs plates let into the faid cheeks ; which mode of mounting is not only convenient for celeftial obfervations, but is remarkably free from tremors, which advantage may be owing partly to fteadinefs of pofitiori, and partly to the mouth of the tube being nearly two feet advanced into the c^en air. If the dome had not a remarkably eafy motion on tliree loofe ebony balls, placed at equal diftanccs, this mode of mounting a large telefcope would not afford a flow adjuftment for motion in a/.imutli, which it now does with facility. It is always interefting to a nian of fcience to know by what progrefTive fteps a great undertaking is accomplithed, as well as to learn under what imprefTion the original idea was entertained of forming the plan of operations. When fir William Herfchel, who was brought up a mufician, refided as organift at Bath, the natural bent of his mind led him to cultivate the pleafing fcience of optics, and to ftudy the theory of mechanics fo far as to enable him to amufe himfelf with attempts to con- ftruft a refledling telefcope : his fnccefs, in an undertaking of confiderable difficulty, increafed with his endeavours to attain fome degree of excellence ; and though at firll he was fatisfied to pick a tolerable fpeculum out of fome dozens at which he had laboured ; yet, feeling that his experience began to give him facilities both in the contrivance and execution of his manipulations, he proceeded by degrees to conftrucl ipecula of ieven, ten, and even twenty feet focus of the Newtonian form, to the number of more than 400, befides feveral of the Gregorian kind : but as yet he was un- acquainted with any certain praftical method of giving a parabohc curve to the face of his metal ; on which account he fele6ted, by trial, fuch fpecula for ufe as he found moll perfeft in figure, and repolifhed the remainder, in all thefe operations there was much room for experi- mental obfervatioii, and the time was not expended in vain. To a mind like Herfchel's, even a failure roufed a feeling for a new cnterprife ; and it was no fmall ftep towards advancement, to have perceived the caufe of un- luccefsful mealures : the objcft being attainable, the means were to be found by (kilful perfeverance. Nor were the labours of our optician to be confined to the formation of a fpeculum ; his mechanical flvill was dircfted to the con- trivance and execution of various ftands for telefcopes of an unufual length ; and in the year 1778, he produced that which is now ufually applied to the Newtonian telefcope, and which we have Juft defcribed as reprefcnted bv P/d/^XXX. /^. 3. By the year 17S1, Herfchel (beft known by this title at that period) felt fuch confidence in Vol. XXXV. his improved methods of proceeding, that he crcdled a llaud for a thirty-feet i-ofliding metal of 36 inches aperture, and fucceeded in calling it ; but to hib "mortification the metal cracked in the coohng. The difappoiutment attending tluK accident mult have been fewere, but did not damp ilie .irdour of the mechanicul adventurer, in which light, no doubt, the enterprifing contriver was now viewed. A fecond molting of the fame metal was immediately determined upon, and a furnace was conllruded for the purpofe, which unfor- tunately gave way, and the liquid metal blew up the pave- ment. The mortification conlequent on this fecond acci- dent only ))lungcd our adventurer the dec-per, tliat he might rife the higher in his next attempt. DunW an intervaFof fome refpite from optical and mechanical labours, the aftronomer, however, wae not alkxp ; and »vhile obfervations were making on the rotations of the planets, with tele- fcopes of the Newtonian form, of 7, 10, and 20 feet focil length, the little planet, at firll fuppofed to be a comet, from its having a vifible magnified difc, was difcovered. This lucky event rekindled the optician's ardour, and at the fame time introduced him to the notice of his majelly ; who, by his liberal patronage, promoted the views of this amateur inftrument-makcr, and afforded facility to his future operations. In the year 1782, a good twenty-feet refleftor was finiflied with a large aperture, and mounted on the Her- fchelian (land for admitting of front obfnval'wm , for which it is found very ufeful. The forty-feet telefcope, or mafter-piece of mechanifm, which is more immrdiately the objeft of our examination, was begun at Clay-Hall at the latter end of the year 1785, when, through the mcduition of the prefident of the Royal Society, the fupport of regal munificence had been gracioudy promifcd ; and, when tjie various portions of the bulky llrudlure, which employed forty workmen of different denominations, had been re- moved to Slough, near Windfor, the foundation was begun, which was to be the (cite for the largeft telefcope that had ever been pointed to tiie heavenly regions. We will not detain our readei- by delcribing the details of mafonry, car- pentry, and fmith's work, which have occupied eighteen large plates, in the fecond part of vol. Ixxxv. of the Phi- lofophical Tranla6tions, for their explanation, but defcribe fo much of the inftrument, and of its appendages, as are ufeful in making aClual obfervations. The beil view for general reprefentation of the Hcrfchc- lian telefcope, is that which has been given in plate 24. of the volume jull named, which therefore we have copied into our Plate XXXI. of yljlronomical Injlrumcnts, with fome flight alterations arifing out of fubfequent improve- ments or curt.iilments of unneceffary appendages. Thi» view, taken from a Ration to the fouth-wefl of the creftion, reprefents the telefcope elevated in the meridian line, and affords the means of feeing the front parts of the inftru- ment, and of its numerous appendages ; but does not allow the mechanifm that fupports the inferior end of the tube, and tiiat gives motion in fome of the adjuflments, to be ex- plained by a reference to their parts, and therefore mull be comprehended from a verbal defcription. The foundati>.in on which the frame-work of the forty-feet telefcope is erected, confifls of two concentric circles of brick-work, orx 42, and the other 21 feet in di.imeter, both funk 2^ feet under ground, and tapering from the breadth of 2 ft. 3 in. below, to I ft. 2 in. above, where they arc capped with paving-ftoncs of 125: inches wide, and 3 thick. In the centre of thcfe circles, is fixed fall into the ground by brick-work, and oppofite braces of wood, a vertical beam, as a centre of motion, round which the whole (Irudurc N n may TELESCOPE^ may have a circular motion in a/imiitli, the plnne of the outer circle bcinpr made perfeAly level. The platform that ronneAs the diffen-nt parts of the frame-work below, has three principal horizontal beams lying parallel to each otht r, and three others lying paralli-l, crolTing tlie fir(t at risjht an- gles, befidcs various Ijracing-beams, that tie the wholi com- paftly together, bv iron bolts palling through the places of croflitig. In our drawing, the outer circle of brick-work and mafonry is denoted by the letters A B, and the circum- ference of the platform of wood by C D : undr-r each op- pofite end of the fix main beams is fixed a roller, of fix inches m diameter, and eight long, having each a ftrong iron frame bolted into the end of its refpeftive beam ; fo that tlte outer circle has twelve rollers: but thefe were not fuffi- ciest to bear the wholi- at 21 feet from the centre of motion ; therefore eight more rollers, nearly equidiflant, were fixed to flrong parts of the platform, fo as to be borne by the inner circle of 2 I feet diameter ; and thus the whole platform, with its fuperftrudlure, is capable of making a revolution, when fufficient force is applied round the central vertica'l beam, that enters a hole at the junction of the two central main beams, and that afcends but a little way out of the ground. Six out of the twelve rollers of the outer circle are feen be- tween A B, the brick-work, and C D, the circular edge of the platform, and the rell may be imagined, not only on the remainder of this circle, but alfo on the inner circle, which is concealed. In thefe rollers, it is of great importance that the axes of motion all point towards the central beam round which they carry the platform, and alfo that their diameters and frames be precifely of like dimenfions, otherwife they will not bear alike on the bafis of mafonry. At twelve feet diftance from, and all round this moveable platform, are fixed faft into the ground eight equidiflant polls, to an oppo- iite pair of which the ends of a long pliable rope are hooked, that give the motion in azimuth ; which rope, being condufted over tVTo feparate puUies, fixed upon the platform, at oppofite fides of the centre, has its ends turned in the direftion of tangents, that point in oppofite direftions to their refpeiSlive polls. The middle part of the rope is made to pafs round one of the fpokes of a large wheel, carried by the platform, before it winds round the axle, fo as to coil up both ends of the rope equally ; which rope therefore pulls by both tangental ends alike, fo as to apply an equal force at each oppofite pulley, while the refillance of the polls produces the requifite motion, without a flrain on die centre. This mechanifm gives the operator a great mechanical advan- tage. That part of the platform C, which connefts the extreme ends of the three longitudinal beams, over the rollers at A, is made ftrong, and is the fupport for a pair of double ladders, that are fee.n afeending to the fummit of the whole frame-work, one on each fide of the large tube E ; and at D is another fimilar fupport for two other double ladders, which, afeending in like manner, meet the former ones, and crofs into them in fuch a way, as to admit of being bolted together at the points of croffing. Thefe ladders are propped by other {horter ladders, as feen in the figure, and fome upright mafts, of which one is feen eretled over the roller at B, afcend in like manner, and afford the means of obtaining horizontal braces at different heights, all round the frame, except where the elevated end E of the tele- fcope requires an opening to be left between the front ladders for Its different degrees of elevation. The tranfverfe beam F G, which lies horizontally over the croffings of the double ladders, and is bolted to them, receives the hooks of the dif- ferent pulhes, which we fiiall (hortly have occafion to de- fcribe, at the fame time that it conneas and braces together all the ladders at their upper extremities. Thefe ladders are each 49 feet 2 inches Jong, fo that liie height of the iralif* verfe beam F G muft be ■^''49 x 49 — 20 x 20 = 45' r.carly, and will therefore admit of the long tube, of 40 feet in length, to be raifed into a vertical pofition und-^r it. Be- low the mouth of the large tube, a gallery H I, with its at- tachr^d brackets K and L, reds upon the (!op s of the in- terior halves of the double ladders, at K and L r- f ftively, and may be made to flide up or down, into any (late of eleva- tion, by two fyftems of pullies, and ropes goi:.ii; round the blocks hooked at th- junftion of each pair of ladd. rs, to tli-- tranfverfebeam F G, as may be feen in the figure ; and whea tliis gallery is lowered to the landing of the pair of fteps M,. a party may be admitted into it to gratify their curiofity, the floor being 13 feet 6 inches by 6 feet i^ inch, and palifaded on the front, as well as partly at both ends. The bafes, or Aiding parts of the brackets, are prevented from flipping afide by lateral rollers of brafs, afting againft the (Iraight fides of the middle pole of each double ladder, while other rollers of the fame metal, acting under them, diminifli ih^'.y friftion, when drawn up or let down by the pullies. In tb.'i framing of thefe brackets, it was necelfary to introduce con- trivances for allowing fome deviation of the gallery from a.i exatl level, in cafe one of the brackets was elevated by its. pulley failer than the other ; which contrivances are not eafily defcribed without a reference to the drawings of the feparate parts in the original account, or without infpeftion of the parts themfelves. The tube of the telefcope, which is 39 feet 4 inches in length, and 4 feet 10 inches in diameter, is made entirely of iron ; it having been afcertained that a wooden tube wo'jld have exceeded an iron one in weight by at leaft 3000 lbs. The fheets were firft; put together by a kind of feaming, that requires no rivets ; and when the fides of the iron platform were cut ftraight, it was lifted by proper tackle into a hollow gutter, and then brought gradually, by vario-.s tools, into a cylindrical form. Various hoops r.re fixed within the tube, and longitudinal bai'S of iron, connefting fome of them, were attached to the two ends of t!-.c tube, by way of bracing the Iheets, and keeping the fiiape perfeft when the pullies are applied to give the neceffary elevation at the upper end, and that the fpeculum might be kept fecure in its bed at the lower end. The hoop by which the upper end of the tube is fufpended is eight inches broad, and thicker than the refl ; and the fyftem of three puDies, feen at N, with each a double block, has a correiponding fet at O, hooked to the tranfverfe pole G F ; and the bars to which the blocks are hooked are fo bent, that the moving ropes wiil not come in contaft ; nor will the elevated tube have its vertical motion difturbed by the tackle, either in afeending or defceniing, which was. an important precau- tion. The lower end of the tube is firmly fupported on rollers, that are capable or being mo\'ed forwards or back- wards by a double rack, moved by wheels and pinio:?s at R, which we fltall not attempt to defcribe minutely ; but the v:fe of which every mechanic ■(vill comprehend '.vith- out particular explanation. Originally there were feveral appendages near the mouth of the tube Aiding by pullies, or fixed to the tube, for the purpofe of regulating the fiuceps taken by this inttrum.er.t ; but as the twenty-feet refleftor is now ufed for this purpofe, they are taken off, and have bean omitted in our drawing. By an adjuftment at the lower extremity of the tube, the fpeculum is turned to a fmail inclination, fo that the line of collimation is not coinci- dent with the longitudinal axis of the tube, but croffes the tube diagonally, and meets the eye in the air, at about two inches from the edge of the tube. Hence no part of the head intercepts the incident rays, and the ebfcrva- tion TELESCOPE. twn is taken with tlie face lool:iiig at the fpcculum, or by what the autlior has called, by way of diftiiiflion, \.\\c front •vi<'-:u, the back "xiiig always turned to the objoCt to be viewed. Befide-v '-lie puUics of elevation, and of a/.imuthal motion, there are others for the purpofe of communication, as well as fpc.il'nnj-pipes, repeating-bells, and iignals by clock-work, which cannot be clearly comprehended without infpeftion, or numerous drawings to be referred to ; but the dexterity of the obferver has rendered fome of thefe fupcr- fluous. The large fpeculuin is enclofed in a llrong iron ring, braced acrois with bars of iron, and an encloiurc of iron and tin (heets makes a cafe for it ; it is lifted by three handles of iron attached to the fides of the ring, and is put into and taken out of its proper place by the help of a move- able crane, running on a carriage, which operation of coiirfe requires great care. Three fmall vanes attached to the edge of the tube at the mouth, afiift to put tlie line of coUiraatioa right, wlicn they are feen refleAed from thefpeculum to the eye-piece. We viCted Slough lately, with a view of ex- amining all the minutiae of the llupendous apparatus tliat is rendered neceifary for the management of this huge telefcope, and that can only be well defcribed on the fpot, and found the fubftance of a letter written by the late Mr. Smcaton on this fubjeft, immediately after a vifit for the exprefs purpofe of infpe, made fait to the femi-tube of the femi-li-ns I ; ,ind a longitudinal count erasing fpring concealed in tube b, and made fall to it at the lower end, .allows the fenii-tubc to recede, but prelfes it cUife to the end of the fcrew ; then another llud /, made fall to the femi-tube of tne femi-lens 2, is tapped for receiving the coarfer thread on the axis of the fame fcrew, which thus gives a double retrograde velocity to this femi-tube, compared with what it receives from the pulh of the finer fcrew ; and as there are two threads in the fine fcrew for one in the coarfe one, and as both are cut on the fame axis, the apparent motion of the femi-lens 2, it aftually the difference ot two contrary, but contemporaneous motions; and thefe motions are fo flow, that five revolutions are equal to Voth of an inch, and confequently the reading is in decimal numbers already. Otherwife, this dynameter it applied exaftly as we have above explained. Befides thefe dynametcrs, we have cx.Tmined a double-image one by DoUoud, in which the microinetcr head was divided into forty parts, and in which the ivory difc was only ,'tth of an inch, fo that 2.50 revolutions meafured the difc, and a doubh meafure might be obtained by making the contad of the two difcs firft to the left and then to tlie right, in order to make the error of zero vanifh, in which cafe half the fum of the two meafures was the true meafure correfted for the oppofite errors of zero, and the graduated circle or head of the micrometer turned IlifF on the axis of the fcrew for ad- juftment to zero. This inftrument profelTcd to have 5 x 40 := 200 divifions in Voth of an inch, and confequently only 2000 in an inch ; but on examining the value of a revolution Avith a fine fcale, we found that 198 divifions meafured -Vt'' of an inch : we will therefore exemplify the ufe of thit inftrument, by ftiewing how the correction for the imper- feftion of the fcale may be applied in a£tual praflice. In the firft place, the fcrew is turned in a retrograde direftion until contaft of the two difcs takes place to the left of the original fingle difc ; in this fituation the 40 on the divided head muft be put to zero, or the lozenge marked as a pointer to the micrometer head, and the ftroke indicated on the fmall fcalcy", by another lozenge or index, muft be noted ; then turn the fcrew, firft till the two difcs unite in one, where a fingle meafure might be taken, andtiien till they are again in contaft to the right ; in which fituation, the whole diameter of one difc will have crofltd the whole diameter of the other, and therefore the fcrew and its parts will give a dcubla meafure of the real diameter. In an aftual trial of a telefcope, this double meafure was found to be two revolutions of the fcrew, and 37 parts of the head, or J J of another revolution ; and on an average of feveral trials, i'„th of an inch was found not cxadtly equal to 200, but to 198 of the divifions of the head, as we have ftated above ; then ' -^l of ,' th of an inch was the double meafure of the difc ; or -, !, i v = 0'295 of an inch was the fingle meafure ; and the diameter of the objeft- giafs being 3.24 inches, we have the power = .0295 no. 1 with great correftnefs, the telefcope having been pcr- vioufly adjufted for viewing the folar fpots. This was the determination of the power of our telefcope of 63.5 inches focal diftance, when No. 4. of the celefti;d eye-pieces was on ; and in the fame way aU the other powers, cclcftial or tcrrcf- trial. TELESCOPE. trial, may as readily b<- obtained. T. Jones's conftruftion is however more convenient for ufe, and is more accura-.e, though it meafures only one difc, unlets the power be great and confequentiy the dlfc Imall. The divided head is fixed fait to the axis of the fcrew, and is divided into loo parts, coo of which meafure exadly ^,th of an inch, fo that tjie inch is fub^ivided into 10,000 of thele parts, and the decimal numbers aie read off at once without calculation : thus, when the difc is adjufted to appear fingle and wcU defined, the index, which is tlie edge of the fcale /, llanda at 100, or zero of the micrometer head, and the edge ot the circular rim of tlie head is coincident witli the firft Itroke of the fcale; but when one revolution of the fcrew has taken place, the faid edge is foufld coincident with the fecond llroke of the fcale, and fo on, as the divided liead revolves ; wlien the two difcs were brought into coiitaft, the quantity indicated, as feen through a lens /-, was z.95, viz. two re- volutions, and I'j'c on the head of the fcrew ; but in this inftrument, five revolutions, we have faid, are equal to /55th of an inch, and therefore one revolution = -,^3, confequently Tnmjo" or -0295 of an inch, is the meafure, as before ; fo that all that is requiflte to do, in regillering the meafures taken with this iuitrument, is to prefix a cipher to the figures read off bv infpeftion, and then the decimal quantity, or divifor, is had, without further calculation, for atelefcopc of any aperture, either dioptric or cata-dioptric, and of any conftruclion. In both DoUond's and T.Jones's dynametcrs the difc is feen without diftorfion and without prifmatic colours, and the inftrument forms a fingle microfcope of the moft ufcful kind ; for, by the latter in particular, fmall objefts may have their dimenfions taken to the accuracy of ^-^i^th part of an inch, and at the fame time the figures may be had by infpeftion, from the fcale and its parts, to form places in decimals when a cipher is prefixed, as we have above ex- plained. The powers of our four telefcopes, with the eye- piece of Troughton's micrometer, were found by T. Jones's double-image dynameter agreeably to the fubjoiued ftate- ment ; viz. In. 30.15 focus ['•50 ^ 1 .040 45-75 ditto •50 .049 3-5° ^0.6 =: power. 63.5 ditto 118.8 ditto 076 3-25 = 46.0 = ditto. 0504 000 64.5 ditto. 0252 =^ 1 19.0 := ditto. In all the three determinations of powers, the adjuftment for vifion was to a diftant terrejlrial objeft, and confequently thcfe are fomewhat too great. From the experience we have had of thefe different modes of afcertaining the powers of a telefcope, we have no hcfitation in giving the preference to the double -image dynameter, in which the two images may be brought into very nice contaft : whereas in the pearl dynameter, which is alfo very good, fomething is always left to eftimation in taking the fractional part of a divifion ; and wheafalfe vifion is ufed, the adjuilmentof the eyes to differ- ent diftances, one within the telefcope and the other with- out, at the fame time, leaves confiderable uncertainty in the fize of the projefted field of view, which will vary according to the flate and pofition of the eye in every trial. We aierition this laft circumftance as worthy of confideration, becaufe feveral micrometrical determinations of the diftance between double ftars have been made, particularly by fir W. Herfchel, where the power of the telefcope determined by falfe vifion is made in effeft the fcale of the meafure ; confe- quently if the power is not accurately afligned, the meafure of the angular diftance depending on it will be proportion- ably erroneous. Aftronomers, we repeat, are yet in want of an unobjectionable mode of meafuring the angu- lar diftances of very fmall double ftars, which cannot be leen when extraneous light is admitted into the telefcope, and which therefore have hitherto been projefted on two lumi- nous points, placed at meafured diftances from each other, for the purpofe of afcertaining the apparent celeftial interval in its magnified ftate, from a comparifon with a known ter- reftrial interval in its unmagnified ftate, which method is liable to confiderable uncertainty, and can only be admif- fible upon the principle of its admitting of an average taken from a fucceffion of meafures under different circum- ftances. We have already explained, in our preceding feftion, how the powers of any telefcope that has a terreftrial eye-tube, may be varied by the application of the celeftial eye-pieces to the eye-end of this, by the help of adapters, and therefore we fliall only fay further on this part of our fubjeft, that how- ever the power is varied by changes of pofition of the eye- pieces, or by additional field-glaffes, any of the dynameters will give the total power, under any of the difpofitions, by the fimple nieafurement of the difc, which we have explained ; but (liould there be any doubt about the exclufion of the rays incident on the extreme circular edge of the objeft-glafs by the diaphragm, or by Troughton's new illuminator, a mea- fured circle, or long flip of paper, ftuck to the face of the objeft-glafs, muft neceffarily be fubftituted for the glafs itfelf, which we were obliged to do with three out of the four of our telefcopes, and then its image at the eye muft be fubfti- tuted for the difc, that we have hitherto defcribed as the true image of the glafs itfelf, which it will be only when all the rays are tranfmitted and refrafted to a focus at the place of the faid ditc or image. In all refrafting telefcopes, that are not achromatic, of which indeed very few are now made, the indiflindnefs of an objeft is direftly as the area of the aperture, and inverfely as the fquare of the focal diftance of the eye-glafs, when this is fingle, becaufe the aberrations are proportional to thefe data ; but in a reflefting telefcope, the indiftinftnefs will be, with fpherical curves, as the fixth power of the diameter of the large fpeculum direftly, and as the fourth power of its focal diftance inverfely, and alfo as the fquare of the focal diftance of the eye-glals inverfely. The light in any telefcope, refrafting or reflefting, if we difregard what is loft by refleftion, is direftly as the fquares of the linear aipertures, and inverfely as the fquare of their linear amplifications. In refrafting telefcopes of various lengths, not achromatic, a given objeft will appear equally bright and diftinft, when their linear apertures, and the focal diftances of their fingle eye-glaffes, are feverally in a fubduphcate ratio of their lengths, or focal diftances of their objeft-glaffes : and then alfo their linear amphfications will be in a fubduphcate ratio of their focal lengths. But in reflefting telefcopes, and in the beft achromatic refraftors, of various lengths, a given objeft will appear equally bright and equally diftinft, when their linear apertures, and alfo their linear amplifications, are as the fquare-fquare roots of the cubes of their lengths ; and confequently when the focal diftances of their eye-glaffes are alfo as the fquare-fquare roots of their lengths. See Smith's Optics, p. 140, et feq. 6. Meafures taken by MicrometriealTelefcopes. — Though the primary ufe of a telefcope is to render a diftant objeft vjfible, TELESCOPE vifible, by amplifying the vifual angle, yet its application to the mealurement of fmall angles was an objctt tiiat en- gaged the aftronomer's attention at no groat dillance of time from its invention. When the apparent diameters of the pla- netary bodies had once been increafed, fo as to fubtend an appreciable angle at the eye of the obferver, it foon became a matter of intcreft to meafure thofe angles in their enlarged ilale. We have already given the defcription of the differ- ent Micrometers that have been fucceffively a])pliod to a telefcope for the purpofe of meafuring minute angles, and terreftrial diftances correfponding thereto ; but we have re- ferved our account of the means proper to [>•: ufed in thefe operations, as conlUtuting a portion of our prefent article. We propofe to illullrate the ufe of a few of tiie mod accu- rate and ufeful micrometers by fuch examples, as will fuf- fice to render the application of any other micrometer in- telligible. When an objeft to be viewed is remote, the rays of light which proceed from it may be confidercd as coming from it in parallel lines, and in this cafe the focus of tlie objeft-glafs, or fpeculum, is the rtiorteft pofliblo ; confequently, the power of the inllrument depending on this focal dillance, is the fmallell poffible with the fame eye-piece ; but the rays which proceed from a near objeft, come to the objeft-glafs or fpeculum diverging, and confequently do not come to a focus fo foon as in the former cafe ; fo that the power is greater than when a diftant objett is viewed. This variation of power depending on the diitance of the objeft viewed, is accompanied by a new adjuftmenl of the eye-piece for dillinft vifion in every telefcope of confiderablc magnitude ; and the longer the focus of the objedt-glafs is, the greater is the va- riation of power with the fame variation of diftance. Hence the angle that is meafured by any of tlie micrometers at- tached to a telefcope, is the true angle only when the objeft fubtending that angle is remote ; and a correftion, depend- ing both on the dillance and fecal length of the telefcope, becomes neceffary for converting the apparent meafured angle into the true one. To a want of attention to this cir- cumftance in tlie praftical application of micrometrical tele- fcopes to the meafurement of terreftrial diftances, is princi- pally to be attributed the failure of their fuccefs ; and celeftial objefts have confequently engroffed their utihty almoft exclufively. We conceive, therefore, that we fhall render our readers an acceptable fervice by Ihewing, not only how fmall celeftial angles may be nieaiured by a tele- fcope fitted up with an accurate micrometer, but alfo how terreftrial angles, fubtended by objefts at various diftances, may be afcertained, and their correfponding diftances be ob- tained with great accuracy ; and that by fimple vifion at one ftation, when the diftance is not very confiderable. The compofer of the prefent article has made experiments with different micrometers adapted to telefcopes of various lengths, and can therefore illuftrate the theory by aftual examples in fuflficient variety. Celejlial Meafures When a micrometer of any defcrip- tion, mechanical or optical, is propofed to be ufed with a telefcope, it is neceffary that the value of one of its divifions be afcertained with that identical telefcope when viewing a remote objeft, fuch as a heavenly body ; or otherwife, that a correftion for diftance be applied previoully to the deter- mination of fuch value. We will firft fuppofe the objeft at a fufficient diftance to require no correftion for want of parallelifm of the rays of light, and will ftiew how to ap- preciate the micrometrical fcale for fuch remote diftance without correftion. The diameter of the fun has been fo well afcertained by aftual mealurement of the beft inftru- mcnts, from month to month, and from year to year, that it Vol. XXXV. may be taken from the Nautical Almanac, or Connoiff.mce dcs Terns, on any giv.Mi day, as a ftandard, from which the value of a correfponding number of divifions on the fcale of the micrometer may be affigncd with great accuracy, after allowance is made for apparent variation in the fun's dia- meter by altitude ; and when the number of miuutcs and feconds correfponding to a certain number of divifions on the fcale is afcert.iined, the value of one divifion is readily obtained by dividing the whole number of minutes and feconds by the whole nimibcr of divifions that meafure the faid quantity : and then whatever may have been the error of the obfervation, as affi-cling the whole fcale, the quan- tity of it belonging to one divifion will bi- only ,'„ ,V. or-jV ot the whole, accordingly as there ware 30, 4.0, or 50 divi- fions in the fcale that corrcfponded to the corredl diameter of the fun. For inftance, on the 7th of Auguft 18 15, the fun's diameter was meafured at noon by a Troughton's micrometer, .ittached to a five-feet rcfrafting achromatic telefcope made by Tulley, and was found to be equal to 60.65 turns of the fcrew, when taken in a vertical dirertion, while the fun paffed horizontally between the two parallel fpider's lines in the focus of the eye-piece. In this fituation the altitude of the fun was fo great, that the diftVrcnce between the refraftions of the upper and lower limbs wa« infenfible, and therefore may be neglcfted in the calculation of the value of the fcale of notches that indicate the revolu- tions of the fcrew. On this day, the frmi-diametcr of the fun, as given in the Nautical Almanac, was 15' 48".3, and the notches correfponding to the fun's diameter were 6o.6j, or 60 entire notches, and —^ taken from the divided head 100 of the fcrew : then ly 48".3 X 2 60.65 = 3i".27 is the value of one notch, or revolution of the fcrew, according to this ob- fervation. Again, on the 15th of Oiflober, of the fame year, the fun's diameter, at nine o'clock P^. M., was found equal to 61.50 revolutions of the fame fcrew, ufed with the fame telefcope, when the fun's fcmi-diameter is g^ven i6' 4". 8, or the diameter 32' 9".6 ; but at the low altitude at which this meafure was taken, the difference of the two refraftions of the upper and lower limbs amounted, by the table of refrac- tions, to 2". 6, to be fubtrafted from the real to produce the apparent diameter, becaufc the vertical diameter was con- trafted by this quantity, the lower limb being more elevated by refraftion than the upper one ; therefore, according to 32' 7" this obfervation, the value comes out ^ = S'''-^^ for 61.5 ^ each revolution ; hence th« average of tjie two mea- fures, taken at different times, and at different altitudes, is 3 1 ". 2 7 4- 2 1 ". 3 3 ^ '- ^ — -^ = 5i".j, which determination accords with 2 ■" ■' meafuies taken at other periods, and alfo with terreftrial mcafures fubfequcntly taken, as will appear hereafter. When this value of the micrometer's revolutions was af- certained, the iolar focus of the objc6l-glafs was exaftly meafured, and found to be 63.5 inches. Three other achro- matic telefcopes were then procured, and had the fame mi- crometer adapted to them refpeftively, by as many rings of brafs, which had each a male and a female fcrew : the former to fcrew into the tube of its telefcope, and the latttr to re- ceive the coarfe thread of the micrometer ; which rings we have called adapters. The focal lengtbs of the rcfpcftive objeft-glaffes were found by accurate meafurement to be 30.15, 45.75, and 1 18.3 inches; and the correfponding O o ViducB TELESCOPE. values of tie micromcler'* revolution, found as above de- feribed, v/en 66".o, 4y'.5, and i6".8 ; viz. exadly in the fcverfe proportion of their focal lengths, as the theory re- quires. Hence, when the value of the micrometer is known with a telefcope of a known focal length, its value may be had, when applied to any other telefcope of a determined focal length, by reciprocal proportion; for as 30.15 in. : 6^.5 in. :: 3i".3 : 66".o ; and convcrfely, wlien the values arc known, and the focal length of one of the telefcopes, the focal lengths of all the others may be determined ; whicli- is equally the cafe with the powers, depending folely on the focal lengths when the fame eye-piece is ufed witli each. When the values of tlie micrometer fcrew had been deter- mined, both by meafuremcnt of the fun, and by mutual com- ])ar)fon of the focal lengths of the four achromatic tele- Icopes, the two following tables were conftrufted to facili- tate the ufe of the micrometer with any or all of the faid telefcopes, which we fiibjoin as a fpecimcn by which other tables may be conllrufted by the fimple arrangement of the multiples of the value of unity. Table I. Values of entire Re\folutions of the Micrometer's Screw, with four differept Telefcopes. Bevol. 30- '5 45-75 63-5 118.3 Uevol. 3c •'5 45-75 63-5 118.3 1 II 1 II 1 II ( // / II / // / // 1 // I I 6 0 43-5 0 31-3 0 16.8 3> 34 6 22 28.5 16 10.3 8 40.8 2 2 12 I 27.0 I 2.6 0 33-6 32 35 12 23 12.0 16 41.6 8 57.6 3 3 18 2 10.5 I 33-9 0 50.4 33 36 18 23 55-5 17 12.9 9 14.4 4 4 24 4 54.0 0 5.2 I 7-2 34 37 24 24 39-0 17 44.3 9 31.2 5 5 30 3 37-5 2 36-5 I 24.0 35 38 30 25 22.5 18 ^5-5 9 48.0 6 6 36 4 21.0 3 7.8 I 40.8 36 39 36 26 4.0 18 14.8 10 4.8 7 7 42 5 4-5 3 39-1 I 57.6 37 ■P 42 26 47-5 19 18.1 10 21.6 8 8 48 5 48.0 4 10.4 2 14.4 38 41 48 27 33-0 19 49.4 10 38-4 9 9 54 6 31-5 4 41.7 2 3J.2 39 42 54 28 16.5 20 20.7 II 55-2 10 II 0 7 15.0 5 13-0 2 48.0 40 44 0 29 0.0 ' 20 52.0 11 12.0 n 12 6 7 58-5 5 44-3 3 4.8 41 45 6 29 43-5 21 23-3 11 28.8 12 13 12 8 42.0 6 15.6 3 21.6 42 46 12 30 27.0 21 54.6 II 45.6 '3 14 18 9 25-5 6 46.9 3 38.4 43 47 18 31 10.5 22 25-9 12 2.4 14 15 24 10 9.0 7 18. 2 3 55-2 44 48 24 31 54.0 22 57-2 12 19.2 '5 16 30 10 52.5 7 49-5 4 12.0 45 49 30 32 37-5 23 28.5 12 36.0 16 17 36 II 36.0 8 20.8 4 28.8 46 50 36 33 21.0 23 59.8 12 52.8 17 t8 42 12 19.5 8 52.1 4 45.6 47 51 42 34 4-5 24 31-1 13 9.6 18 19 48 13 3-0 9 23-4 5 2.4 48 52 48 34 48.0 25 2.4 '3 26.4 >9 20 54 13 46.5 9 54-7 5 19.2 49 53 54 35 31-5 25 33-7 13 43-2 20 22 0 14 30.0 10 26.0 5 36.0 50 55 0 36 15.0 26 5.0 14 0.0 21 23 6 15 13-5 10 57-3 5 52.8 5> 56 6 36 58-5 26 36-3 14 16.8 22 24 12 15 57.0 II 28.6 6 9.6 52 57 12 37 42.0 27 7.6 H 33-6 23 25 i8 16 40.5 II 59-9 6 26.4 53 58 18 38 -^5-5 27 38.9 H 50.4 24 26 24 17 24.0 12 31.2 6 43-2 54 59 24 39 9.0 28 1Q.2 15 7-2 25 27 30 18 7-5 13 2-5 7 0.0 55 60 30 39 52-5 28 41.5 '5 24.0 26 28 36 18 51.0 13 33-8 7 16.8 56 61 36 40 36.0 29 12.2 15 40.8 27 29 42 19 34-5 14 51 7 33-6 57 62 42 41 19.5 29 44.1 '5 57-6 28 30 48 20 18.0 14 36-4 7 50.4 58 63 48 42 3-0 30 15.4 16 14.4 29 31 54 21 1-5 15 7-7 8 7.2 59 64 54 42 46.5 30 46.7 16 31.2 30 33 0 21 45.0 15 39-0 8 24.0 60 66 0 43 30.0 3' i8.o 16 48.C Taeli TELESCOPE. Table II — Value of the Parts of the Micrometer's Screw, with four different Tilcfcopcs Parts. 30-'5 45-75 63-5 118. 3 I'arts. 30-15 45-75 63-5 1 18.3 l\n,. 30- '5 45-75 63-5 11K.3 .01 0.7 0.4 II 0-3 II 0.2 -35 II 23.1 U 15.2 II 10.9 II 5-9 .69 II 45.6 II 30.0 II 21.6 II 1 1.6 .02 1-3 0.9 0.6 0-3 •36 23.8 .5.6 "-3 6.0 .70 46.2 30-4 21.9 1 1.7 •03 2.0 1-3 0.9 0.5 •37 24.4 1 6. 1 11.6 6.3 •7' 46.9 30.9 22.2 11.9 .04 2.6 1-7 1.2 0.7 •38 25.1 16.5 U.9 6-3 .72 47-6 3'-3 22.5 12. 1 .06 3-3 2.2 1.6 0.8 •39 25.8 17.0 12.2 6.5 ■73 48.2 3'-7 22.8 12.3 4.0 2.6 1.9 I.O .40 26.4 17.4 12.5 6.7 •74 48.9 32.2 23.2 12.5 .07 4.6 3-0 2.2 1.2 .41 27.1 17.8 12.8 6.9 -75 49 5 32.6 23^5 12.6 .08 5-3 3-5 2.5 ••3 .42 27.8 •8-3 '3-« 7.0 .76 50.2 33-0 23.8 I 2.8 .09 ^•? 3-9 2.8 '•5 -43 28.4 18.7 '3-J 7.2 •77 50.9 33-5 24.1 12.9 .10 6.6 4-3 3-1 '•7 -44 29.1 19.1 .3.8 7-4 .78 5'-5 33-9 24.4 '3-1 .H 7-3 4.8 3-4 1.8 •45 29.7 19.5 14. 1 7-5 •79 52-2 34-4 24.7 "3-3 .12 8.0 5-2 3-8 2.0 .46 3P-4 20.0 14.4 7^7 .80 52.8 34-8 25.0 '3-5 . -13 8.6 5.6 4.1 2.2 -47 31.0 20.4 14.7 2-9 .81 53-5 35-2 25-3 '3-7 .14 9.2 6.1 4-4 2-3 .48 3'-7 20.9 15.0 8.0 .82 54.2 35^7 25^7 '3-8 •15 9.9 6.5 4-7 2-5 •49 32-4 21.2 15-3 8.2 •83 54-8 36.1 26.0 14.0 .16 10.6 7.0 5.0 2.7 .50 33-0 21.7 15.6 8.4 .84 55-5 36-5 26.3 14. 1 •17 II. 2 7-4 5-3 2.8 -5« 33-7 22.1 16.0 8-5 •85 56.2 37-0 26.6 '4-3 .18 II. 9 7.8 5.6 3-0 -52 34-4 22.6 16.3 8.7 .86 56.8 37-4 26.9 14.4 •«9 12.5 8-3 5-9 3-2 •53 35-° 23.0 16.6 8.9 .87 57-5 37-8 27.2 14.6 .20 13.2 8.7 H 3-3 •54 35-7 23-4 16.9 9.0 .88 58.1 38-3 27^5 14.8 .21 >3-9 9.1 6.6 3-5 •55 36-3 23-9 17.2 9.2 .89 58.8 38-7 27.9 14.9 .22 14.5 9.6 6.9 3-7 .56 37-0 24-3 '7-5 9-4 .90 59-4 39-' 28.2 15.0 •23 15.1 lO.O 7-2 3-9 -57 37-7 24.7 17.8 9-5 .91 60.1 39-6 28.5 15.2 .24 15.8 10.4 7-5 4.0 -58 38-3 25.3 18.1 9-7 .92 60.7 40.0 28.8 ^5-i .25 16.5 10.9 7-8 4.2 •59 38-9 25.6 18.5 9.9 •93 61.4 40.4 29.1 tSS .26 17.2 1 1.3 8.1 4-3 .60 39-6 26.1 18.8 10.0 •94 62.0 40.9 29.4 '5-7 .27 17.8 II. 7 8.4 4-5 .61 40-3 26.5 19.1 10.2 •95 62.7 4>-3 29.7 '5-9 .28 18.5 12.2 8.8 4-7 .62 41.0 26.9 19.4 10.4 .96 63-4 41.7 30.0 16.1 .29 19.2 12.6 9.1 4-9 -63 41.7 27-4 19.7 10.5 97 64.0 42.2 30^4 16.3 •30 19.8 13.0 9-4 5.0 .64 42-3 27.8 20.0 10.7 .08 64.7 42.6 30-7 16.4 •31 20.5 13-5 9-7 5.2 .65 42.9 28.3 20.3 10.9 99 65-3 43- > 31.0 16.6 •32 21.2 13-9 lO.O 5-3 .66 43-6 28.7 20.7 11. 1 1.00 66.0 43-5 31-3 16.8 •33 21.8 1 4- 3 10.3 5-5 .67 44-3 29.1 21.0 1 1.2 •34 22.5 14.8 10.6 5-7 .68 44.9 29.6 21.3 11.4 The ufe of thefe tables will be beft underftood from a few real examples. 1. The fun's diameter was taken by Troughton's micro- meter, applied to the telefcope of 45.75 inclies focal length, on the 27th of May 1815, when his altitude was fo high as to require no correftion tor the difference of the two rc- fraftions of the lower and upper limbs, and was found equal to 43.62 turns of the fcrew : then by Table I. 43 = ■31' io".5, and by Table II. .62 = 26".9, the fiftn of which is 3i'37'''.4, the diameter given in the Nautical Almanac being 31' 37". In this obfervation the thicknefs of the fpider's line was allowed for. 2. On the 7th of Auguft 1815, the fun's diameter at noon meafured 60.60 turns, when the micrometer was ufed with the telefcope of 63.5 inches focal length ; whence we have 60 in Table I. = 31' 18", and .60 in Table II. = i8".8, making together 31' 36".8, the diameter in the Nautical Almanac for that day being 15' 48".3 X 2 = 31' 36".6. When thefe meafures were taken, the telefcope was on an equatorial ftand, and the parallel lines were fo placedj that the fun's body paffed along the fpacc con- tained between them, without any apparent variation of altitude, which pofition is neceffary in every obfervation taken with Troughton's micrometer, when the objeft has an apparent motion. 3. On the 14th of Auguft 1815, the moon's diameter was meafured about 9 P.M. not far from the meridian, when her altitude was about 18', with Troughton's micro- meter, attached to the telefcope of 45.75 inches focus, and was found equal to 41.52 turns of the fcrew ; the horizon- tal fcmi-diameter, according to the Nautical Almanac, be- ing at noon 15' 4", and at midnight 15' o", confcquently at the time 15' l". To the horizontal diameter 30' 2", add the augmentation at 18^ altitude, (from Table IV. of the rr- guJjflte tables,) iiix. 5", and the diameter in altitude will be 30' 7". Now from Table I. take the value of 41 turns = 29' 43".5, and from Table II. take the value of .52 = 22". 6 ; the fum of which two values will be 30*6". i, which muft be incrcafed by 5", the difference of refrailion at 18', and 18° 30' of altitude; fo that the diameter, whtn the reduftions are all made, is too great by 4" nearly, which error may be in the limar tables, or in the obferva- tion, which was made when the moon's age was only eleven days, and therefore under an unfavourable circumftancf ; O o 2 for TELESCOPE. tor ii! ihis liiuauon the illuminated portion of the moon is always apparently larger than the dark portion. 4. The fun's diameter was again taken at nine o clock A M. on the 15th of Oaober, with the telefcope of 63.5 inches, and was found equal to 61.56 turns, vvhen the alti- tude was fuch as to require an addition of 2 '.6 for the va- riation of ihc rcfrattion ip half a degree of altitude ; and here we have from Table I. 60 4- I = 31' 18" + 3i".3 - ,,'4g".3, and from Table II. .56 = if .5, making, to- gether with + 2".6 the correftion, the fum 32' g".^, the diameter given in the Nautical Almanac being i6'4".8 X z = 32' 9"-6- r T • 1 In all tiiefe examples, as well as in the data from which the preceding tables were computed, Troughton's microme- ter was ufed as a celeftial eye-piece, where the objed was confequently inverted, which is the manner in which tins micrometer was intended to be ufed ; but according to the conftruaion of the modern teiTeftrial eye-tube, this micro- meter may be fubftituted, by help of an adapter, for the two glaffes at the eye-end of this tube, in which fituation the magnifying power is very confiderably increafed, and confequently the fcale rendered capable of meafuring fmaller portions of a fecond, than in the ufual way, particularly when there is light enough in the field of view, :. e. when the objeft-glafs has a large diameter. When the microme- ter in queition is applied to the eye-end of the terreftrial tube of the telefcope of 45.75 inches, one turn is equal to only i6".03, which (hews the power to be fomewhat greater than when the 118.8 inches telefcope was ufed as a celeftial telefcope with the fame micrometer ; and with the telefcope of 63.5 inches, which has three pair of feparate field-glafTes, the terreftrial powers with the laid micrometer gives the refpcclive values of one turn of the fcrew 9".97, "/".gS, and 5". 15 ; fo that this telefcope has four various va- lues of the micrpmetrical fcale, which may be ufed in fuc- ceffion for meafuring the fame angle, according to circum- ftances, and each variety may have a feparate table computed for its particular ufe. This application of Troughton's micrometer to the terreftrial tube, and the additional pairs of field-glafTes, were contrived by the author of this article, and led to another addition, wlach in itfelf admits of ftill greater varieties. On obferving that the modern terreftrial eye-tube is in faft a compound micro/cope, it occurred to him, that there are three modes of increafing the power of this inftrument ; firft, by (hortening the compound focus of the eye-glaffes ; fecondly, by fhortening the compound focus of the pair of field-glaffes ; and thirdly, by lengthening the dif- tance between the compound eye-glafs and compound field- glafs (or objeft-glafs of the microfcope). The two former modes had now been tried, and afforded the varieties in the meafures which we have fpecified : the laft one was therefore reforted to thus ; a tube was made to Aide within the teiTef- trial tube, after its own eye-piece was withdrawn, and the micrometer was made to fcrevir into this moveable tube, fo as to vary the diftance of the micrometer glafles from the field-glaffes of the telefcope at pleafure. The refult proved as was expefted ; every new pofition for diftance gave a new value to the fcale of the micrometer, and the two extremes of thefe values, with the 63.5 inch telefcope, were 10" and 5* refpeftively p&r revolution of the fcrew ; at leaft the points were found by experiment on the Aiding tube, where tliefe values, and alfo the intermediate ones 9", 8", 7", and 6" per revolution, were marked with a graver. The dif- tances of thefe points depended on the field-glaffes ufed with the Hiding tube ; and three fets of points were inferted, to correfpond to the three pairs of field-glaffes, any one of which admitted the fcale to be fubdivided into tenths of a 10 fecond. This mode of applying a (liding micrometer in the terreftrial tube is as ufeful as novel ; for when the pofition is made for an exaft number of feconds p^r tiu-n of the fcrew, the tables are difpenfed with ; the only operation being to multiply the number of turns by the number of feconds be- longing to the pofition of the Aiding tube, and then to re- duce them to minutes by 60 as a divifor. A few examples will render thefe new methods of ufing the micrometer per- fcftly intelligible^ and will at the fame time Aiew that they contribute greatly to accuracy, by a fpecies of repetition of the meafurc, of which they are capable. We will firft ex- emplify the method without the Aiding tube. I. 'The meafures of Jupiter's diameter, taken by the 63.5 inch telefcope on the 19th of April 181 6, were as follow ; Bv Troucrhton's micrometer ufed 7 , _ " " o ' fn- 1 ■ f 1-43 X 31.3 — 44.8 as a celeftial eye-piece - 3 ^j j j -r-r By N° I. 6f the field-glaffes withl ^ the terreftrial tube - J By N° 2. of ditto - - 5.53x7.98 = 44.13 By N° 3. of ditto - - 8.32x5.15=42.85 4)173-98 Average of the four meafures 43-495 The values of the tliree field-glaffes had been taken by ten-eftrial meafurement at 700 feet, on the 31ft of March 1816, and may require farther correction. 2. On the 30th of April 1816, Jupiter being very nearly in oppofition, his diameter was meafured with the 45.75 inch telefcope, wliich has only two varieties, a celeftial and a ter- reftrial application of the micrometer, and the refult was thus : viz. By the celeitial meafure, taken to the! • . , r y 1.04 turns, right ot zero " ' ' J By the fame, taken to the left of zero - 1.05 ditto. 2)2.09 By the terreftrial meafure 2.72 x 16". 03 1.045 II = 43-52 = 43-50 2)87.02 The average of the celeftial and terreftrial meafures = 43.5 1 3. On the 25th of Oftober 1815, the following meafures were taken of the diameter of Mars with Troughton's mi- crometer attached to the Aiding tube of the telefcope 63.5 inches ; •vix,. Firft pofition at the dot of 7"! '^'""'- " _ " with third field-glafs - ]" 3-43 X 7 -24.01 Second pofition with ditto - 2.96 x 8 ^ 23. 6S Third pofition with ditto - 2.68 x 9 = 24.12 Fourth pofition with ditto - 2.40 x 10 = 24.00 With N° 1. field-glafs and its'? , dot 4" - - . I 0-0 X With N° 2. field-glafs and itsi dots" - - - i 3-0 X With the micrometer ufed as a^j celeftial eye-piece - j '' ' 3 -3 — 4- 4 = 24.00 8 = 24.00 7)167.91 23.987 Thefe TELKSCOPE. Thefe obfervations of Mars were niadt> near the meridian, when he was a little paft oppofition, and confequcntly when his diameter was near a niaximiini.whiolicircunillance we mention, becaufe aftronomers have given very difeoidant accounts of the apparent diameter of this planet ; and perhaps no deter- mination has beL'n more accurate than we have here given. 4. The iun's diameter was mealured at noon on the 24th of September 18 16, by Trougliton's micrometer adapted to the 30.15 inch telefcope, iji the following manner ; viz. II I II 29.21 X 65.7 = 31 59.1 tions, unconncded with each other, k. i".24 for i-acli unit read on the vernier, and this datcrminaliun was afurwards confirmed by an obfcrvaiion of the fun taken on the zcth 1919" September 1816, viz. - - = I ".24 very nearly. After having given a value to DoUond's micrometer thus fitted up, on the 2 ill of Auguft 1816, the diameter of Saturn's riim was meafured when its longer diainetcr was very nearly hori- 'O'ltal, both to the right and left of zero, and was found By the celeftial power - 29.21 x 65.7 = 31' ^g.'l •^l"*' to one fubdivifion and 7.7 on the vernier, or 25 + 7.7 By theterreftrial, with theeye-l ^ _ = 32.7' parts of the vernier ; then 32.7 x l".24 = 40". J48 tube Hided to dot 30" I "3-92 X 3° - 3' 57-6 is the meafure of the greatefl length of Saturn's ring taken By the terrelhial, at dot 28" 68.50 X 28 =31 58. 0 By the terreftrial, at dot 25" 76.74 x 25 =31 58.5 4)127 53-2 Average meafure ... By the Nautical Almanac 15' 59".! X 2 = 3« = 3» 58-3 58.2 On the Aiding tube of this telefcope, the dots on the fcale run from 31" to 19", at which dots the powers are to eacii other inverfely as thefe numbers ; but the whole diameter of the fun cannot be taken on the fcale of the micrometer when a greater power is ufed, than when the pofitioii is at dot 25", or middle dot of the Aiding tube, where the power is about 82. In thefe four examples, the diameters meafured were the vertical diameters, for taking which Troughton's microme- ter is peculiarly adapted ; but the horizontal diameter of a body in motion cannot be taken with the fame accuracy with this inftrument, on account of the difficulty of keeping the extreme edges of the objeft in contaft with the fpidcr's lines, while the final .idjuftment of the meafure is making. For this ptirpofe, DoUond's divided objeft-glafs micrometer IS more convenient, and may have its fcale appreciated, and tl»e values thereof tabulated in the way we have already ex- plained. For inftance, we obtained a divided obje£t-glafs, with the requifite adjuftmcnts both for circular motion and for the feparation of the centre of the femi-lenfes, of three inches and a half diameter, and fitted it over the objeft-end of the 45.75 inch achromatic of TuUey, while the original objeft-glafs, of the fame dimenfions, remained in its place. The focus of this divided objeft-glafs was fo long, that it fhortened the original focus only to 40.3 inches. The fcale of the objeft-glafs is divided into inches and twentieth parts of an inch, one of which parts or fubdivifions is again re- duced by a vernier into twenty-five fubordinate parts, fo that -j'j- of -jJj, or -sTroth of an inch, is the fmallefl quantity appreciable bv the vernier. On the gih of AuguR i8i6, when the fun's diameter was 31' 37", or 1897", the oppofite limbs of the two apparent images of the fun coincided when the fcale indicated three inclies, one-twentieth part, and eleven towards 25 on the vernier, after an allowance was made for the index error by a crofTed obfervation of a very fmall angle. Now thefe numbers reduced into the loweft denomination, give 1536 parts of the vernier, and 1897" — 2__ =; i".25r is the value of one of thefe parts ; but by 1536 a terreftrial meafureraent, to be explained hereafter, the value taken at 700 feet diftancc, with a correftion for want of paralleUfm of the rays at this diftance, the value came 888" „ , r u- ^ J • out- = i".245; the average 01 which two dettrmioa- 713 near tlie meridian, when the patfage was at nearly 28 minutes pall eleven P.M. ; and, confequently, when the planet was at no greater dillance than eight days from oppofition. On the 4th of Auguft 1815, tile gieateft diameter of Saturn':, ring however, meafured with Troughton's micrometer at- tached to the 63.5 inch telefcope, had been found by careful meafurement = 1.50 x 3i"-3 = 46".95, the planet being then only three days from oppofition. By the fame apparatus the ring had been made 48".2 on the loth of September 1815, and on the 25lh of the fame month only 43". Thefe difcrcpancies (hew that no dependence can be placed in horizontal meafures made with Troughton's micrometer when the olijeft is in apparent motion, but for all other meafures of fm.iU angles, it is no doubt the bell that has been yet invented. Dr. Brevvfter's micrometer has the fame adv.int.igc as DoUond's, when the divided lens is ufed as the Aiding lens within the tube; but the power of the patent telelcopes hitherto conftrui'.ted is fo fmall, that an angle can feldom be meafured with it nearer than to 10", and frequently not fo near. The principle, however, is apphcable to telefcopcs of larger dimenfiDns. When DoUond's and Troughton's micrometers are both apphed to the telefcope of 45.75 inches, the value of the fcale of Troughton's becomes ."Utered from 43". 5 to 49".4, namely, in the invcrfe ratio of the diminifhed focus ; and they may both be ufed with great convenience at the fame time, in which cafe, one may meafure the angular length and the other the angular breadth of tiie fame body ; or, if the body 'oe celeftial, one may give the horizontal and the other the vertical dimenfions at the fame inftant. This mode of applying two micrometers, one optical and the other mechanical, at the fame time, affords a mnuial check on the meafures of eacli, when the body is round, like one of the heavenly bodies, and gives a very falisfadlory refult, when it can be adopted. When Troughton's micrometer is ufed as a celeftial eye-piece, along with DoUond's micro- meter attached to the telefcope 45.75, ftiortened to 40.3, the double images are formed beyond both eye-glaffes, reckoning from the eye, and gives there I ".24 as the value of one uroke on the vernier ; whereas when a common celeftial eye-piece is ufed with DoUond's, the fecond glafs of the compound piece (hortens the focus of the objed- glafs a little, and the images arc feen between the two glafl'es of the eye-piece ; confequently the value of Dol- lond's micrometer varies a trifle with every difte-rent eye- piece, which is not the cafe with Troughtoii.'s, where the image is always in the unaltered focus ol the objett-glafs. On the 26th of September 1816, a careful lines ol ob- fervations W.1S made of the fun's diameter with both Trough- ton's and DoUond's micrometers ufed at the fame time, when the former gave 38.85 X 49".4 = S''59"-2, and the other 15.47 (3 ii. I div. 22 on vcm.) x i".2i := 31' 58".28, the diameter of the fun by the Nautical Almanac being TELESCOPE. being 31' 59". 2 horizontally, and 3 1' 57",9 vertically, at the altitude of 38". TerreJIrial Meajures In the examples which we have given of ccleftial angular mcafures taken by a microme- trical telefcope, no correait)ii of the meafured angle was iieceflary, becaufe tlie rays of light coming from thefe objefts may be confidcred as parallel on entering the objeft-glafs, and as always converging to the fame focal point, where the image is formed ; hence the magnifying power of the celef- tial telefcope does not vary. But when tcrreftrial objefts are viewed at different diftances, there is a deviation from parallehfm in the courfe of the rays, which increafes in the inverfe ratio of the diftance, and which lengthens the focus of the objeft-glafs, and confequently increafes the power of the inftrument, even with the fame glaffcs. This altera- tion in the effeftive length of a telefcope is praftically dif- covered by the adjuftment of the eye-piece for diflinft vifion, which is neceffarily different at different diftances from the objeft viewed. But we have fhewn, that the fcales of Troughton's and of Dollond's micrometers will vary with the variable powers of even the fame telefcope, and there- fore will require a correftion for each variety of power, or, in other words, for each variety of terreftrial dlltance. The determination of thefe varying correftions, therefore, is. effential to the accuracy of the meafures taken by a mi- crometer in all cafes, where the incident rays of light come diverging from objefts placed at moderate diftances. If we put_/" for the folar or principal focus of the objeft-glafs of any telefeope, and d for the diftance of an objeft from the faid abjeft-glafs when ufed, the addition to the length of the folar focus, which we will call e, according to the laws of dioptrics, may be found by this theorem, — . , d-f Jiat is, the fquare of the folar focus, divided by the dif- tance in the fame meafure, when diminifhed by one focal diftance, will be the elongation, or excefs of the lengthened focus over the folar focus ; then as the powers are to each other refpeftively as the focal lengths, with the fame eye- piece, we fhall have f '■ f -\- c : : true angle : meafured or apparent angle ; and converfely, zs, J -^ c : f ■.: apparent angle : true angje. For inftance, let it be required to afcertain what is the neceffary correftion for an angle, itiea- fured by a telefcope of 63.5 inches focus, that is fubtended by one yard at a hundred yards diftanfce from the objecl- glafs. By a fimple cafe in plain trigonometry, the true angle fubtended by a yard, at a hundred yards diftance, is 34' 59". 4, or 34'.99 ; and 63.5 inches are 1.764, when reduced into the denomination of yards and decimal parts ; then 1.764 X 1.764 3.111696 , , . , , — — 0.03167 =«, the mcreafed 100 — 1.764 length of the focus 98.236 and 1.764 4- 0.03167 X 34'.99 _ 1.704 35'.6i8, or 35' 37".o8 will be the meafured angle, therefone 35' 37".o8 — 34' 59".4 = 37".68 is the corrtftion to be added to the true angle, in order to obtain the apparent angle, that would have been the true ang!e alfo, if the focus of the objeft-glafs had remained unaltered at the diftance of 100 yards. But it is the correftion anfwering to the appa- rent or meafured angle that we want, and the determination of this requires a tranfpofition which is operofe, and there- fore objeftionable in praftice ; on which account we recom- mend each furveyor, military tadlician, and leveller, who is difpofed to avail himfelf of the ufe of a micrometrical tele- fcope, for fhortening his labours, to ufe tables adapted to the focal length of his own telefco;)e, which may give by in- fpeftion the correftion proper in all cafes for reducing the apparent angle into the true one, and •vice iierfd. Tables III. and IV. which are fubjoined, were computed for this pur- pofe, from the theorem juil exemplified, and are adapted for a telefcope of 63.5 inches focal length, to which we have added Table V., as a general table for finding the diftance, in yards and decimal parts, con'efponding to any angle, from i' to 30' 59" inclufively ; even to the accuracy of a fingle fecond, when that angle is fubtended by an exacl yard. The labour of conftrudiing thefe tables has been confiderable, but the facility and accuracy with which they give the de- fired refults, has amply repaid the computer, and, it is pre- fumed, will be a recommendation to the notice of our fcientific readers, to whom their application may in many cafes be found ufeful. TABtE TELESCOPE. Tablk III. — For converting the true into the apparent Angle. Table IV. — For converting the apparent into the true Angle. True A„ale 0" 10" 20" 30" 40' 50" II /( II II (/ II l' + 0.OJ + 0.04 + 0.05 + 0.06 -f 0.08 + 0.10 2 0.12 0.14 0.16 0.19 0.22 0.25 3 0.2S 0.31 0-34 0.37 0.41 0.45 4 0.49 0-53 0.57 0.61 0.66 0.71 5 0.76 0.81 0.86 0.92 0.98 1.04 6 1. 10 i.i6 1.22 1.29 1.36 '-43 7 1.50 ••57 1.64 1. 71 1.79 1.87 8 1.96 2.04 2.12 2.20 2.28 2.37 9 2.46 2.54 2.63 2.72 2.82 2.92 10 3-03 3-H 3-25 3-36 3-46 3-57 II 3.68 3-79 3-90 4.02 4.14 4.26 12 4-39 4.51 4.64 4.76 4.89 5.02 13 5-15 5.29 l-^^l 5-37 5-7' 5.85 H 5-99 6.13 6.28 6-43 6.58 6-73 •5 6.88 7-03 7.18 7-33 7.48 7-64 16 7.80 7.96 8.13 8.36 8-47 8.64 17 8.82 8.99 9.17 9-35 9-53 9-7' 18 9.89 10.07 10.25 10.44 10.63 10.82 '9 1 1. 01 1 1.20 11-39 11.59 11.79 U.99 20 12.19 12.40 12.61 12.82 13-04 13.26 21 13.48 13.69 13.90 14. 11 H-32 '4-53 22 14.74 14.96 15.18 15.40 15-63 15.86 23 16.09 16.33 16.57 16.81 17.05 17.29 24 17.53 17.77 18.01 18.25 18.49 18.74 25 18.99 19.25 19.51 19-77 20.03 20.29 26 20.56 20.82 21.08 21-34 21.60 21.87 27 22.14 22.41 22.68 22.96 23.24 23-52 28 23.81 24.09 24-37 24.66 24.95 25.24 29 25-53 25.82 26.11 26.41 26.71 27.01 30 27-31 27.61 27.91 28.21 28.52 28.83 31 29.14 29.45 29.47 30.09 30.41 30.73 32 3 J -05 31-37 31.69 32.01 32-33 32.66 33 3299 33-32 33-65 33-99 34-33 34-67 34 35-OI 35-35 35-69 36-03 36.38 36.73 35 37.08 37-43 37-79 38-15 38-5» 38.87 36 3923 39-59 39-95 40.31 40.67 41.03 37 41.40 41-77 42.14 42.51 42.88 43-25 38 43.62 44.00 44-3S 44.76 45-15 45-54 39 45-93 46.32 46.71 47.10 47-49 47.89 40 48.29 48.70 49.11 49.52 49-93 50-34 4' 50-75 51.16 51-57 51.98 52-39 52.81 42 53.23 53-65 54-08 54-5' 54-94 55-37 43 55.80 56.23 56.66 57.09 57.52 57-95 44 58.38 58.82 59.26 59-71 60.16 60.61 45 61.06 61.51 61.96 62.41 62.86 63-31 46 63-77 64.22 64.67 65.12 65.58 66,04 47 66.50 66.96 67.42 67.88 68.34 68.81 48 69.28 69.75 70.22 70.70 71.18 71.66 49 72.14 72.63 73-«2 73.61 74.11 74.61 50 75.11 75.61 76.11 76.61 77.12 77-63 51 78.14 78.66 79.18 79.70 80.22 80.74 52 81.26 81. 78 82.36 82.83 83.36 83-99 53 84.42 84.95 85.4S 86.01 86.54 87.08 54 87.62 88.15 88.69 89.23 89.77 90.31 1 55 90.85 91.39 91-93 92.48 93-03 93-58 156 94- '3 94.08 95-23 95-78 96-33 96.88 57 97-43 97.98 98.53 99.09 99.65 100.21 58 100.77 101.33 ]ioi. 89 I102. 46 103.03 103.60 59 104.17 104.751105,33 105.91 106.50 107.09 60 107.68 108.27 108.86 109.45 110.04 ! 10.64 Ap|Mr(ii Angle. 0" 10" 20" 30" 40" 50" II II II II II II l' — 0.0^ — O.0<) —0.05 —0.06 —0.06 -0.1 2 0.1 O.I 0.1 0.2 0.2 0.2 3 0-3 0-3 0-3 0.4 0.4 0.5 4 0.5 0.5 0.6 0.6 0.7 0.7 5 0.8 0.8 0.9 0.9 I.O 1.0 6 I.I I.I 1.2 »-3 '-3 1.4 7 '-5 1.6 1-7 >-7 1.8 '-9 8 2.0 2.0 2.1 2.2 2-3 2-4 9 2-5 2.6 2-7 2.8 2.9 3-0 10 3-' 3-2 3-3 3-4 3-5 3-6 II 3-7 3-8 3-9 4.0 4.1 4-3 12 4.4 4-5 4.6 4-7 4.8 4-9 '3 5.0 5-2 5-4 5-5 5-7 5.8 '4 5-9 6.0 6.2 6-3 6.5 fc.6 '5 6.8 7.0 7-' 7-3 7-4 7-5 16 7-7 7-8 8.0 8.1 8-3 8-5 17 8.7 8.8 9.0 9.2 9.4 9-5 18 9-7 9.8 1 0.0 10.2 10.4 10.6 19 10.8 II.O 11.2 11.4 11.6 11.8 20 12.0 12.2 12.4 12.6 12.8 '3-' 21 '3-3 '3-5 13.6 13.8 14.0 14.2 22 14.4 14.6 14.7 14.9 15.1 '5-3 23 15.6 15.8 16.0 16.2 .6.5 16.7 24 17.0 17.2 17-5 17.7 18.0 18.2 25 18.5 18.7 19.0 19.2 19.5 19.7 26 20.0 20.2 20.5 20.8 21.0 21.2 27 21-5 21-7 22.0 22.3 22.5 22.8 28 23.0 233 23-6 23-9 2A.2 26.0 24-5 29 24.8 25.1 25.4 25-7 26.3 30 26.6 26.9 27.1 27.4 27.7 28.0 31 28.3 28.6 28.8 29.1 29.4 29.7 32 30.0 30-3 30.6 31.0 3»-3 31-6 33 32.0 32-3 32-7 33-0 33-3 33-6 34 33-9 34-2 34-5 34-9 35-2 35-5 35 35-8 36.1 36-4 36-7 37-' 37-5 36 37.8 38.1 38-5 38-9 39-3 39.6 37 40.0 40-3 40.8 41.0 41.3 41.7 38 42.0 42.3 42-7 43-1 43-5 43-9 39 44-2 44-5 44.9 45-2 45-6 46.0 40 46.4 46.8 47.2 47-6 48.0 48.4 4' 48.8 49-2 49-6 50.0 50.4 50.7 42 51.0 51.4 51.8 52.2 52.6 53-0 43 53-4 53-8 54-2 54-7 55-^ 55-6 44 56.0 56.4 56.8 57-3 57-7 58.. 45 58.5 58.9 59-3 59-8 60.2 60.7 4(r 61. 1 61.6 62.1 62.5 62.8 63.2 47 63.6 64.1 64.5 64-9 65-3 65.8 48 66.2 66.7 67.1 67-5 68.0 68.4 49 6S.9 69-3 69.8 70.2 70.7 71.1 50 71.6 72.0 72.4 72.9 73-3 7.1-8 51 74-3 74-8 75-3 75-8 76.2 76.7 52 77-2 77-7 78.2 78.7 79-2 79-7 53 80.2 8c. 7 81.2. 8.-7 82.2 82.7 54 83-2 83-7 84.2 84.7 85.2 85-7 55 86.2 86.7 87.2 87.7 88.2 88.7 56 89.2 89.7 90-3 90.8 91.3 91.8 57 92-3 92.8 93-3 93-8 94-3 94.9 58 ^I'i 95-9 96.4 97.0 97-5 98.1 59 98.6 99-1 99.6 100.2 I CO. 7 101.3 60 101.8 102.4 103.9 '03-5 104.0 1C4.5 12 TELESCOPE. Table V.— For finding the Diftance in Yards from the Trtie Angle fubtended by one Yard. Tru» Anglf. 0" i" 2" 3". 4" 5" 6" 7" 8" 9" I' 3437-7 3381-34 3326.8 3274- 3222.8 3173.26 3125.15 3°78.54 3033-25 2989.3 2 1718.8J 1704.64 1690.67 1676.93 1663.4 1650.1 1637- 1624.1 1 1611.4 1598.93 3 1 145.9 1139.56 ■133-3 1127.11 1120.98 1 1 14.92 1108.94 11C3. 1097.15 i09>-33 1 4 859-43 855-83 852.32 848.81 845-33 841.88 838.46 835.06 831-7 828.36 S 687.54 685.25 682.98 680.73 678.45 676.27 674.05 671.86 669.63 667.51 6 572.95 571-36 569.78 568.21 566.65 565.10 563-55 562.02 560.49 558.98 7 491.1 489.93 488.77 487.62 486.46 485-32 484.18 483.05 481.92 480.80 i 429.71 428.81 427.91 427.03 426.16 425.28 424.40 423-53 422.66 421.80 9 381.96 381.25 380.55 379-85 379-15 378.46 377-77 377-07 376.39 375-70 lO 343-77 343-19 342.62 342.05 341-49 340-93 340.36 339-79 339-23 338-69 II 312.52 312.02 311.52 311.09 310.63 310.17 309.70 309.23 308.77 308.31 12 286.47 286.07 285.68 285.28 284.89 284.49 284.10 283.71 283.32 282.93 13 264.44 264.10 263.76 263.42 263.09 262.76 262.42 262.08 261.75 261.42 «4 245-55 245.26 24497 244.67 244.38 244.09 243.81 243-52 243-23 242.94 '5 229.18 228.92 228.67 228.41 228.16 227.91 227.66 227.41 227.16 226.91 16 214.85 214.62 214.40 214.17 213-95 213 72 213.51 213.29 213.08 212.86 17 202.22 202.02 201.82 201.62 201.42 201.22 201.03 200.83 200.64 200.44 18 190.98 190.80 190.62 190-35 190.27 190.09 189.92 189.74 189.57 189.40 •9 180.93 180.77 180.61 180.45 180.29 180.13 179.98 179.82 179.67 179.51 20 171.88 171-73 171.59 171-44 171.31 171. 17 171.02 170.88 170.74 170.60 21 163.70 163-57 163.44 163-31 163.18 163.05 162.92 162.79 162.66 162.53 22 156.26 156.13 156.01 155.88 155-76 155.64 155-54 155.42 155-31 155.19 23 149.46 149-35 149.24 149-13 149.03 148.93 148.82 148.71 148.60 148.49 24 143-23 143-13 143-03 142.94 142.84 142.75 142.64 142.54 142.44 142-34 25 «37-5> 137-41 137-32 137-23 137-14 137-05 136.96 136.87 136.78 136.68 26 132.22 132-13 132.05 131.96 131.88 131.80 131-71 131.62 131-54 131.46 27 127.32 127.24 127.16 127.08 127.00 126.93 126.85 126.77 126.69 126.61 28 122.78 122.70 122.63 122.55 122.48 122.41 122-33 122.26 122.19 122.11 29 118.54 118.47 118.40 118-33 118.26 118.19 118.13 118.07 118.00 117-93 30 114.59 114.52 114.46 114-39 114-33 114.27 114.20 114.14 114.08 114.01 TELESCOPE. Table V. — continued. Ani;le. 10" 11" 12" ■3" ,4" •5" 16" 17" 18" 19" I' 2946.6 2905.1 2867.75 2825.5 2787.25 2750.16 27'3-97 2678.73 2644.38 2610.91 2 1586.63 '574-52 •567-57 1550.84 '539-27 1527.86 1516.62 1505.56 1494.65 14R3.9 3 1085.6 1079.9 1054.27 1068.71 1063.25 1057.75 105.'. 35 1047.01 1041.74 1036.49 4 825.05 821.76 818.5 815.22 812.05 808.86 805.7 802.57 799.46 796-37 5 665.36 663.22 661.09 658.98 656.88 654.8 652-73 650.67 648.62 646.58 6 557-46 555-96 554-47 552.98 55'-5 550-03 548.58 547.12 545-66 544.23 7 479.68 478.59 477.66 476.36 475-26 474.16 473.08 472.0 470.92 46^.84 8 420.94 420.08 41923 418.38 4'7-53 416.69 4.5.85 415.01 414.18 4'3-3S 9 375-02 374-34 373.66 372-98 372-3' 37 '.64 370.97 370-3' 369.65 368.98 lO 338-13 337-57 337-62 336-47 335-93 335-38 334-82 334.29 333-76 333.22 1 1 307-85 3^7-39 306.93 306.47 306.02 305-57 305.12 304.67 304.22 303.77 12 282.55 2S2.16 281.77 281.39 281.01 280.63 280.24 279.86 279.49 279.. I '3 261.09 260.76 260.13 260.11 259.78 259-45 259.12 258.80 258.47 258.15 14 242.66 242.37 242.09 241.80 241.52 241.24 240.96 240.68 240.40 240.12 '5 226.66 226.41 226.6 225.91 225.67 225.42 225.18 224.93 224.69 224.44 16 212.64 212.42 212.20 21 1.98 211.76 211.54 2"-33 21 I.I I 210.90 210.68 17 200.25 200.05 199.86 199.66 199.47 199.28 199.09 198.90 198.71 198.52 18 189.23 189.05 188.88 188.70 188.53 188.36 188.19 188.02 187.85 187.68 •9 179-35 179.19 179.04 178.88 178.73 178.57 178.42 178.26 178.11 177.96 20 170.46 170.32 170.8 170.04 169.90 169.76 169.62 169.48 169.34 169.20 21 162.41 162.28 162.16 162.03 161.91 161.77 161.65 161.51 161.39 161.26 22 155.08 154.96 154.85 •54-73 154.62 154.50 '54-38 154.27 154.15 '54-03 23 148.38 148.27 148.17 148.06 147.96 147.85 '47-75 147.64 '47-54 •47.43 24 142.24 142.14 142.05 141.95 141.85 141.75 141.66 141.56 141.46 141.36 25 >3fi59 136.50 136.41 136-32 '36.23 136.14 136.05 '3596 135.87 •35-79 26 »3J-38 131.29 131.21 131.12 131.04 '30-95 130.87 130.79 130.71 130.62 27 126.54 126.45 126.38 126.30 126.23 126.14 126.07 125.99 125.92 125.84 28 122.04 121.97 121.90 121.83 121.76 121.69 121.62 121.54 121.47 1 2 1 .40 29 117.86 117,79 J17-73 117.66 117.59 117.52 117,46 "7-39 117.32 117.16 30 113-95 113.89 '•3-83 113.76 113.70 113.64 113.58 113.51 ".V4S "3-39 Vol, XXXV, PP TELESCOPE. Table V. — continued. True 30" 21" 22" 23" 24" 25" 26" 27" 28" 1 29" l' 2578.27 2546.44 2515.4 2485.1 2455-5 2426.6 2398.4 2370.82 2343-87 2317-55 2 1473-3 1462.86 1452-55 1442.38 1432-37 1422.49 1412.75 1403.14 1393.62 '384-3' 3 1031-3' 1026.17 1021. 1 1016.07 1011.05 1006.16 1001.27 996-43 991.64 986.9 4 793-32 790-24 787.26 784.26 781.28 778.34 775-42 772.51 769.64 766.78 S 644.56 642.56 640.56 638.38 636.61 634-65 632.70 630.77 628.85 626.94 6 542.8 541-37 539-95 53856 537-18 535-75 534-36 462.47 532-99 531.62 530-25 7 46S.77 467.70 466.63 465-59 464.55 463-51 461.46 460.45 459.41 8 413-53 411.70 410.88 410.06 409.25 408.42 407.61 406.81 406.03 405.22 9 368.33 367.66 367.02 366.36 365-71 365.06 364.42 363-78 363-14 362.49 10 332.68 332-14 331-61 331-08 330-55 330.02 329.49 328.96 328.44 327-92 II 303-32 302.87 302-43 301-99 301-55 301.11 300.67 300.23 299.80 299.36 12 278.73 278-35 277.98 277.60 277-23 276.86 276-49 276.12 275-75 275-38 '3 257.82 257.49 257.16 256.83 256.51 256.20 255.90 255.58 255.27 254.96 14 239.84 239.56 239.29 239.01 238-73 238.45 238.18 237.90 237.63 237-35 15 224.20 223-95 223.71 223.46 223.22 222.98 222.74 222.50 222.26 222.02 16 21047 210.25 210.04 209.82 209.61 209.40 209.19 208.97 208.76 208.55 17 198-33 198.13 197.94 197-75 197.56 197-37 197.18 197.09 196.81 196.72 18 187.51 187-34 187.17 187.00 186.83 186.66 186.49 186.32 186.15 185.98 19 177.81 177.65 177.50 177-35 177.20 177.04 176.89 176.74 176.59 176.44 20 169.06 168.92 168.78 168.64 168.51 168.37 168.24 168.10 167.97 167.82 21 161. 14 x6i.oi 160.89 160.76 160.64 160.51 160.39 160.26 160.14 160.01 22 153-92 153.80 153-69 '53-57 153-46 153-34 153-23 153.12 153.01 152.89 23 '47-33 147.22 147.12 147.01 146.91 146.80 146.70 146.59 146.49 146.38 H 141.27 141.17 141.08 140.98 140.88 140.78 140.69 140.59 140.50 140.40 25 135-7^ 135.61 135-52 135-43 135-34 '35-25 135.16 135-07 134.98 134.89 26 130-54 130.46 130-38 130-29 130.21 130-13 130.05 129,97 129.89 129.80 27 125.77 125.69 125.62 125.54 125.47 125.38 125-31 125.23 125.16 125.08 28 '21-33 121.25 121.18 121. II 1 2 1. 04 120.97 120.90 120.83 120.76 120.69 29 j "7-19 117.12 117.05 116.98 116.92 116.85 116.78 116.71 116.65 116.58 . 30 113-33 113.26 113.20 113.14 113.08 113.01 112.95 112.89 112.83 112.77 TELESCOPE. Table V. — continued. True Angle. 30" 31" 32" 33" 34" 3S" 36" 37" 38" 39" i' 2291.8 2266.61 2241.97 2217.87 2194-3 2171.2 2148.55 2126.41 : 104.7 2083.47 2 1375.08 1365-97 1356.93 1348.1 '339-36 1330.72 1322.19 '3' 3-77 ■305-45 1297-23 3 982.2 977-54 972.93 968.36 963.84 959-36 954.91 950.51 946.15 941.83 4 763-93 761. 1 1 758-31 755-54 752.78 750.04 747-33 744.62 74'-9J 739-29 5 625.03 623.15 621.23 619.40 617.55 615.71 613.87 612.05 610.24 608.44 6 528.88 527-53 526.18 524.84 523-50 522.18 520.87 519-55 518.24 5.6.95 449-37 7 458.36 457-34 456-33 455-33 454-32 453-3^ 452-33 45 1-34 450.36 8 404.43 403.64 402.85 402.06 401.29 400.51 399-73 398-95 398.19 397-4' 9 361.86 361.22 360.59 359-96 359-35 358-71 358.09 357-47 356-85 356.23 10 327-40 326.88 326.36 325.84 325-33 324.82 324-32 323-81 323-29 322.78 II 298.93 298.49 298.06 297.65 297.20 296.77 296.35 295.92 295.50 295.08 12 275.01 274.65 274-29 273.92 273-56 273.18 272.83 272.47 272.11 271.75 >3 254.64 254-33 254.02 253-7' 253-39 253.08 252.76 252.46 252-15 251.85 H 237.08 236.81 236-54 236.27 236.00 235-73 235-46 235-19 234-92 234-65 15 221.78 221.54 221.31 221.07 220.83 220.59 220.36 220.12 219.89 219.66 i6 208.34 208.13 207.92 207.71 207.50 207.29 207.09 206.88 206.67 206.46 17 196.44 196.24 196.06 195.87 195.69 195.50 195-32 195-13 194.95 194.76 i8 185.82 185.64 185.48 185.31 185.15 184.98 184.82 184.65 184.49 1S4.32 '9 176.29 176.14 175-99 175.84 175.69 175-54 175-39 175-24 175-09 174-94 20 167.69 167.54 167.41 167.27 167.14 167.00 166.87 166.73 166.60 166.47 21 159.89 159.76 159.64 159.51 159-39 159.27 159-15 159.02 158.90 158.78 22 152.78 152.67 152.56 152.45 152-33 152.22 152.11 151.99 151.88 151-77 23 146.28 146.17 146.07 145-97 145.86 145.76 145.66 145.56 145.46 145-35 24 140.31 140.21 140.12 140.02 139-93 139-83 139-74 139.64 139-55 139-45 25 134.81 134-73 134.64 134-55 134.46 134-37 134-29 134.20 134.11 134.02 26 129.72 129.64 129.56 129.48 129.40 129.31 129.23 129.15 129.07 128.99 27 125.01 124.93 124.86 124.78 124.71 124.63 124.55 124-47 124.40 124.32 28 120.62 120.55 120.48 120.41 120.34 120.27 120.20 120.13 120.06 119.99 29 116.52 116.45 116.39 1 16.32 116.26 116.19 116.13 116.06 116.00 115-93 , 30 112. 71 112.65 112.59 112.52 1 12.46 112.40 112.34 112.28 112.22 1 12.16 Pp 2 TELESCOPE. Table V. — continucil. True Angle. 40" 4." 42" 43" 44" 45" 46" 47" 48" 49" I' 2062.62 2042.2 2022.1 2002.54 1983.28 1964.4 1945.85 1927.68 1909.82 1892.31 2 1289.13 1281.13 1273.22 1265.41 1257.7 1250.06 1242-55 1235.10 1227.75 1220.47 3 937-55 933-27 929.15 924.94 920.81 916.72 912.66 908.64 904.65 900.72 4 736.65 734-03 73>-43 728.83 726.27 723.72 721.19 718.69 716.18 713-71 5 606.65 604.87 603.1 601.35 599.6 597.86 596.12 594.41 592.71 591.01 6 515.65 514-36 513.00 511.81 510.55 509.29 508.04 506.78 505.52 504.30 7 448.40 447.42 446.45 445-49 444-53 443-57 442.62 441.67 440.73 439-79 8 396.66 395.88 395-12 394-37 393-63 392.88 392-13 391-38 390.64 389.90 9 355-62 355-01 354-40 353-79 353-18 352-56 351-93 351-35 350-78 350.18 10 322.28 321.78 321.28 320.78 320.28 319-79 319.29 318-79 318-30 317.81 1 1 294.66 294.24 293.82 293.40 292.98 292.56 292.15 291-73 291.32 290.92 12 271.40 271.04 270.68 270.32 269.97 269.62 269.28 268.93 268.59 268.23 13 251-54 251.24 250.93 250.62 250.32 250.02 249.71 249.41 249.11 248.81 H 234-38 234.11 233-84 233-57 233-31 233-05 232.79 232-53 232.27 232.01 ij 219-43 219.19 218.96 218.72 218.49 218.26 218.03 217.80 217.57 217-34 16 206.26 206.05 205.85 205.64 205.44 205.23 205.03 204.82 204.62 204.41 •7 194.58 194.40 194.22 194.03 193-85 193.67 193-49 193-31 193-13 192.95 18 184.16 183.99 183-83 183.67 183.51 183-34 183.18 183.01 182.85 182.69 19 174-79 174.64 174.49 174-34 174.20 174.05 173-91 173.76 173.62 173-47 20 166.34 166.20 166.07 165.94 165.81 165.67 165.54 165.41 165.28 165.14 21 158.66 158.54 158.42 158.29 158.17 158.05 157-93 157.81 157-69 157-57 22 151.66 151.54 151-43 151.32 151.21 151.10 150.99 150.88 150.77 150.66 23 145.25 145.14 145.04 144.94 144.84 144.74 144.64 144.54 144.44 144-34 24 139-36 139.26 139-17 139.09 138.99 138.89 138.80 138-70 138.61 138.52 25 133-93 133-94 133-86 133-67 133-59 133-50 133-42 133-33 133-25 133-16 26 128.91 128.82 128.74 128.66 128.58 128.49 128.41 128.33 128.25 128.18 27 124.25 124.17 124.10 124.02 123-95 123.88 123.80 123.72 123.65 123.58 28 119.92 119.85 119.78 119.71 1 19.64 119.57 119.50 I '9-43 1 19-36 119.29 29 115.87 115.80 115.74 115.67 115.61 115.54 115.48 115.42 115.36 115.29 30 112. JO 112.04 111.98 111.91 111.85 111.79 111.73 111.67 111.61 111-55 TELESCOPE. Table V. — conlmmd. 'I'riie Angl«. 50" 51" 52" 53" 54" 55" 56" 57" 58" 5v" I' 1875.11 1858.21 1841.62 1825.32 1809.3 1 793.6 1778.12 1762.92 '747-95 '733-29 2 ■2'3-3 1206.2 1 199.2 1192.24 1185.42 1178.64 1 171.93 1 165.3 1158.77 1152.30 3 896.8 892.9 889.06 885.24 881.46 877.72 873-97 870.30 866.65 863.02 4 711.25 708.8 706.37 703.96 701.57 699.18 696.81 694.49 692.15 6H9.83 5 589.32 587.64 585.96 584.30 58265 581.02 579-38 577-76 575-'5 574-55 6 503.08 501.85 500.63 499.42 498.22 497.02 495.82 494-63 493-45 492.27 7 438.86 437-92 436.98 436.07 435-15 434-24 43332 432.42 43'-5' 430.61 8 389-17 388.44 387-71 386.98 386.25 3«5-54 384-81 384.10 383-39 382.67 9 349-59 848.99 348-4' 347.82 347-25 346.66 346.08 345-49 344-92 344-34 lO 317 32 3-6.83 316.35 315-85 315-38 314-90 314-42 313-94 3 '3-47 3 '2-99 II 290.51 290.07 289.68 289.28 288.88 288.47 288.07 287.67 287.27 286.87 12 267.87 267.52 267.18 266.S3 266.49 266.15 265.81 265.46 265.12 264.78 '3 248.51 248.21 247.91 247.61 247-31 247.02 246.72 246.42 246.13 245-83 '4 231-75 23 '-49 231-23 230.97 230.72 230-47 230.22 229.96 229.70 229.44 '5 217.12 216.89 216.66 216.43 216.21 215.98 215.75 215.52 215.30 215. cs i6 204.21 204.00 203.80 203.60 203.40 203.21 203.01 202.81 202.61 202.41 I? 192.77 192.59 192.41 192,23 192.05 191.87 191.69 191.51 '9'-33 191. 15 i8 182.53 182.37 182.21 182.05 181.89 181.73 181.57 181.41 181.25 181.09 19 •73-33 173.1S '73-04 172.89 172.75 172.60 172.46 172.31 172.17 172.03 20 165.01 164.88 164.75 164.61 164.48 164-35 164.22 164.09 163.96 .63.»3 21 157-45 157-33 157.21 157.09 156.97 156.85 '56-73 156.61 156.49 '56-37 22 150.55 150.44 150-33 150.22 150.11 150.01 149.90 149-79 149.68 '49-57 23 144.24 144.14 144.04 143-94 143.84 143-74 143-64 143-54 '43-44 '43-34 24 138-43 138-33 i38-?4 138.15 138.06 137.96 137-87 137-78. 137.69 137.60 25 133-07 132.98 132.90 132.81 132-73 132.64 132.56 132-47 '32-39 '32-3' 26 27 128.10 128.03 127.95 127.87 127.79 127.71 127.63 127.56 127.48 127.41 ■23-5I '23-43 123.36 123.28 123.21 123-13 123.06 122.98 122.91 122.84 28 119.22 119.16 119.09 119.02 118.95 118.88 1 18.81 118.74 118.67 118.60 29 115.23 115.17 115. 11 115.04 114.98 114,91 114 85 1.4-78 114.72 114.66 3° 111.49 'n-43 '"-37 III. 31 111.25 III. 19 III. 13 111.07 II 1.01 110.95 TELESCOPE. Conjlruaion and UJe of tht TabUs.—VCe have already ex- plained the conftrudion and ufc of Tables I. and II., which are required to be adapted to the particular telefcope with which any given micrometer is ufed ; and we have alfo ex- plained how tlie value of a fingle divifion, or turn of a fcrew, is afcertained by means of the fun's diameter : but this me- thod gives a derivative rather than an original independent value to the micrometrical fcale ; for if the fun's diameter be not truly given in the Nautical Almanac (and the late Dr. Malkelyne had reafon to alter it in the lateil years of his life), the errorof this meafure will be introduced into the Icale derived from it ; Table III. is therefore inlerted, as affording the ready means of obtaining an independent fcale from aftual tcrreftrial meafurement. We have already rtiewn how the table of correftions is conflrufted in this table ; and the reader will have no difficulty in taking out the proper numbers, as correftions to be added to the true angle, in order to convert it into the apparent or meafured angle, if he be careful to take the minutes of the given angle from the left-hand vertical column, and the feconds from the hori- zontal line at the top ; for in every inftance, the meeting of the two columns will contain the additive quantity that is to be applied to the true angle, in order to obtain what the tele- fcope will give when the value of its fcale is once duly affigned. For inftance, fuppofe the true angle 14' 20", where 14' is taken at the fide, and 20" at the top, the junc- tion of the two columns gives + 6".28, which (hews that this quantity muft be added to 14' 20", the true angle, to make 14' 26". 28, the apparent angle, as meafured by a tele- fcope of 63.5 inches focal length. If now this angle, reduced into feconds, be divided by the turns of the fcrew, or divifions on any fcale ufed as a micrometrical fcale, the quotient will be the value in feconds of one turn, or divifion, as the cafe may be, provided the angle in queftion be that which a true yard adlually fubtends at a known diftance. For example, when a yard of 36 exaft inches was erefted at the diftance of 190.98 yards, the micrometer of Troughton, attached to Tulley's 63.5 inch telefcope, meafured it by 34.78 revolu- tions of its fcrew ; and by Table V. the true angle, read as in Table III. at the fide and top, correfponding to this dif- tance, is 18' o" ; the additive quantity belonging to this angle, as taken from Table III., is + 9". 89 ; and therefore the apparent angle, if meafured by the faid telefcope, would be , ^ i8'9".89 ,, ■ , , r 18' 9".89 ; therefore = 31.33 is the value ot one revolution of the fcrew, which is very nearly the fame as vi:as determined from the fun, and before tabulated. This coincidence of the celeftial and ten-eftrial meafures affords a convincing proof that the fcale has been duly appreciated. We have faid, that this table of coiTeclions, and alfo the following one, which we (hall explain prefently, are com- puted exclufively for a telefcope of 63.5 inches focus, being that which is reprefented, with a Troughton's micrometer attached, mjig. 6. of Plate XXIX. ; and that each different telefcope ought to have its own tables of correftions cor- refponding to its focal length, which limitation is required by the theorem on vyhich we have grounded our calculations. But as the diftance, which is the varying term, is the fame for all telefcopes, we find that in praftice the correftions of any other telefcope will be fo nearly proportionate to their refpeftive focal lengths, that they may be taken exaftly as fuch, without any fenfible error ; that is, the error ariiing from the table of correftions will be always as fmall as the error of obfervation in ordinary telefcopes, unlefs the diftance be very fmall, and its correftion confequently great. On this account, Table III., and alfo Table IV., which, it will be fcen, is derived from it, like Table V., may be confidered as genera/ tables, admitting of proportional parts of their whole correftions to be taken as fuitable correftions for telefcopes of other dimenfions. This confideration is of great im- portance, with refpeft to the general utihty of our tables of correction ; and therefore the reader (hall not depend folely on the authority of our bare afTertion. We have already computed the corredlion for a telefcope of 63.5 inches focal length, to be added when the true angle is 34' 59".4, or diftance 100 yards, and found it 37".68 ; let us fee what it will be v^'ith the fame data, when the telefcope has juft one half of the faid focal length : here we have ■'''■— 00- "f - yard for the focal length ; of then <2 X •//> T' _ .0078? = e, the clonffation of 100 - 882 99.118 / 5 ' 6 the focus, and .882 X .00785 X 'Ml 34-99_ .^, , — 35 '3' or 35' 18" for the apparent angle, from which, if we fubtraft 34' 59".4, the true angle, the difference l8".6 wiU be the correfpond- ing correftion, which differs only a quarter of a fecond or half the correftion of the telefcope of fro 37".68 double dimenfions. Beyond 100 yards diftance, the en-or, fmall as it is, will continue to diminifh as the diftance in- creafes, and a fmaller diftance will feldom require to be mea- fured in this way. The accuracy of this conclufion has been ftill farther corroborated by aftual experiment : a gra- duated ftaff was placed ereft at a diftance, by meafurement of a Troughton's chain of five -feet hnks, of 261.9 yards, and the two telefcopes of 63.5 and 45.75 inches focal length, were tried againft each other thus ; a yard by the firft was found, with Troughton's micrometer, to be equal to 25.33 turns ; and by the fecond, with the fame inftrument, to be 18.19; the true angle belonging to this diftance by Table V. is I3'7".54; and the correftion for the larger telefcope by Table III. + 5' .25: therefore, taking: ,' or .72 of 5". 25 = 3".8 for the correftion of the fmaller telefcope, we have the following values of the refpeftive fcales ; •3' 7"-S4 + 5"-25 _ 3 1 ".2984, &c. and 25-33 = 43". 504, which values accord very i3'7"-54+ 3"-8 18.19 nearly with thofe that had been previoufly determined by a feries of folar meafures, and the latter of them exaftly, as far as to the third place in the decimal figures. Table IV. is the table to be ufed with Table V. for finding, firft the true angle from the apparent one, and then the true diftance at once from this true angle : its correftions are arranged fomewhat differently from thofe in Table III., and have an oppofite fign, but are borrowed from Table III. in fuch way, that by means of a little tranfpofition, the terms of one may be converted into thofe of the other ; as, for example, at the apparent angle 18' 40", in Table IV., the correftion is — 10". 4, and the true angle confequently i8'29".6; and at 18' 30", the neareft numbers for the true angle in Table III., the correftion is + io".44, which makes its correfponding apparent angle 18' 4o".44. In the former of thefe two tables, the correftion is calculated to the hundredth part of a fecond ; it being that from which the fcale has its value appreciated; but in the latter, it was deemed convenient to leave out the hundredth parts, as being TELESCOPE. being beyond the powers of the telcfcopc, or rather of tlie human eye, when a fingle obfervation is taken. Before Table V. was conftruded, it was found by j)laiic trigonometry, that one yard will fubtend an angle of one mi- nute at 3437-7 yards didance ; and, as the dillance d>'creafes in the fame ratio in winch the angle increafcs, the table was made by a continual reduAion of this number into halves, thirds, fourths, &c. as far as to 30', and all the intermediate feconds from i' to 30', were inferted with their correfpond- ing diftanccs. For inftance, at the true angle of 1 8' 30", tlie true dillance is 185.82 yards ; it being always under- ftood, that the meafured angle is fubtcnded by an exad yard placed at right angles to the line of fight, in either a vertical or horizontal pofition, and that the correftion taken from Table IV. has been applied to the meafured or apparent angle. If two yards fliould be ufcd as the oppofed objeCl at a great diftance, then /',///" the angle only muil be taken ; but if half a yard only be ufed at fmall dillances, then double the angle will be proper ; and Ihould the diftance be within 110.95 y^i'ds, the fmaJlcft diilance contained in the table ; in which cafe the angle will exceed 30' : the dillance belong- With telefcope 30.15 in. 24.59 revol. = 27 2.9 (by 45-75 in- 37-53 revol. = 27 10.5 63.5 in. 52.25 revol. — 27 15.43 1 18.8 in. 98.52 revol. = jy 35.1 ing to half\.\\e anjrle will always be douMt the didance re- quired, Suppofe tiic angle 33' ; then hilf of this is 16' 30", and the double number 20S.34 ; confcquenlly 104.17 yirdt will be the correfponding dillance ; and thus the table will extend to any Ihort dillance, by taking a given portion of the meafured angle, when reduced to the true one, and by ufmg the fame portion of tlie correfponding dillajice, pro- vided the angle do not exceed 60', which is the limit a( Table IV., and wliich is as much as a telefcope magnifying only 30 times will ufually take into the field of view. In order to exemplify the ufe of ihcfe new tables, and at the fame time to prove their accuracy, we obtained from Mr. Troughtou a couple of Haves, having each a (liding yard of brafs, cut into notches for decimal divilions of a yard, which are capable of being feen at a diftance, with an apparatus for placing them perpendicular in any giveu fituation : on the 8th of Oclober 1816, one of thcfe llavea was fixed in a perpendicular pofition at an unknown diftance on level ground, and the following meafures were taken of the angle fubtended by a yard, by Troughton's micrometer fuccemvely adapted to each of the four telcfitopcs, thus : Tables I. and II.) - 10.4 (by Table IV.) = 26 52.5 — 15.6 .- - =26 54.9 — 21.85 - - =26 53.58 — 41.0 - - =26 54.1 4)215.08 By Table V. the diftance correfponding to this angle is 127.81 yards, and by meafurement of a good chain, it was afterwards found to be 5.808 x 22 = 127.776 yards, the difference or error being only .034 of a yard, or fomething lefs than an inch and a half. During the obfervations, the fun was obfcured by clouds, and the objedl viewed had no vibratory motion, which is a circumftance effential to be attended fo. With Dollond's divided objedl-glafs applied to the tele- fcope of 45.75, the meafure was 2 in. ii div. 19 ver., or ? 294 of the vernier, which, multiplied by i".24, the folar Average = 26 53.77 value of unity, gave the meafured angle only 26' 44".56 ; but on examining the ratio in which the focus elongates at different diftances, we found that the divergence of the rayf was leffened fo much, in pafTmg through the divided objed- glafs, before they entered the acliromatic objedt-glafs, that the table of corredions would be of no ufe for this arrange- ment of two feparate objeft-glaftes. On the 1 6th of the lame month the graduated ftaff was ereAcd at a greater unknown diftance, and the following meafures were taken by Troughton's micrometer, as before, With telefcope 45.75 in. 27.59 revol. =. 63.5 in. 38.48 revol. = 20 0.1 — 8.6 (correftion) = 19 51.5 20 4.4 — 12 - - = 19 52.4 to which angle the correfponding dillance by Table V. is 173.0 yards; and the fubfequent meafure by the chain accurately repeated was 172.92 yards, in which determi- nation the error was .08 of a yard, or 2.88 inches only. From thefe operations we are perfuaded that a good telefcope, with a Troughton's micrometer, will determine diftances, by fimple infpeftion, when within t'le eighth part of a mile, with more accuracy than is ufually done by a furveyor's chain or meafuring-wheel ; and, confequently, if both a backward and forward view be taken from one ftation, fituated near the middle of a Une joinir-g two gra- duated ftaves, a quarter of a mile may be fo determined at one Jlatlon in the fpace of two or three minutes after the ftation is taken. But it m.ay be faid, why not take a quarter of a mile at one fight, lince the power of a good telefcope will command a fmall objcft at this diftance i To which we anfwer, that the error aiifing from diftance 9 2)103.9 Average = 19 51.95 may be confidered rather as a geometrical than an optical error : our experiments have convinced us that a fmall angle may be meafured by Troughton's micrometer, when the thicknefs of the fpider's line is allowed for, {viz. locth of a turn of the fcrew in our micrometer,) fo accurately, that the error of obfervation in favourable weather will feldom exceed one fee or. J ; but the error in diftance, cor- refponding to an error of one fecond in the meafured angle, increafes in the duplicate ratio of the diftance, and confe- quently becomes too confiJerr.ble to be admiflible beyond a hmited diftance ; for inibince, at the diftance of 220 yards, or the eighth of a rnile, an error of 1" in the angle fubtended by a yard produces only an error of 0.23 of a yard in diftance ; but at 440 yards, or a quarter of a mile, the error in diftance corr. fpondiiig to the fane error in the angle is 0.92 ; that is, at twice the diftance the geometri- cal error is four times augmented ; which circunillancc limits TEL limits the diftance at which micronietrical meafurements in loiiKimetry can be ufcfullv employed at one ilation. What may be called the ot^liral error, or that which anles from want of parallclilm in the rays of light on entermg the obiea-jrlafs, and is allowed for in our fourth table, on the contrarv, d-creafes with an incrcafe of diftance, and very nearly in a fub-duplicate ratio ; fo that the corredion ariling out of this optical error bjcoraes infenfible at no very great diftance in tclefcopcs of ordinary dimenhons : for inftance, at 220 vards, or its angle 15' 3S", the correaion is - 7 .4 by our'Tablc IV.; but at 440, or its angle 7' 49', the correclion diminilhes to l".9, or nearly a fourth of the former at double the diftance. Hence there is a peculiar diftance at which every feparate telefcopc will have its optical error or correaion reduced to 1", or quantity of probable error of obfervation, beyond which diftance the tabulated correftions may be difregarded in ordinary opera- tions. With the telefcope of 63.5 inches focus, the cor- reftion will be lefs than 1" at 590 yards diftance; with that of 45.75 inches, at 537 ; and with that of 30.15 inches, at 430, the diftance continuing to diminilh with the dimi- niftiing length of the focus of each objeft-glafs, but not in the fame ratio ; confcquently, when the telefcope is very ftiort, and its power fmall, the optical error may be alto- gether difregarded, wherever fucii telefcope can be of any real ufe ; becaufe, in all probability, this error will be lefs than the error of obfervation arifing from want of power. - Telescope Shell, in Comhology, the name of a fpecies of turbo, with plane, ftriated, and numerous fpires. TELESCOPICAL Stak.s, fuch as are not vifible to the naked eye, but difcoverable only by the help of a tele- fcope. See Star. AH ftars lefs than that of the fixth magnitude are tele- fcopic to a middling eye. TELESE, in Gcograf'hy, a town of Naples, in Lavora, the fee of a bilhop, who reiides at Cerreto ; 18 miles E.N.E. of Capua. N. lat. 41° 12'. E. long. 14" 32'. TELESIA, or Telessia, in Ancient Geography, a town of Italy, in Samnium. Telesia, in Mineralogy. See CoRUNDUM. TELESIO, Berkardino, in Biography, a modern phi- lofopher, the defcendant of an illuftrious family at Cofenza, in Naples, was born in the year 1508 or 1509. Having re- ceived the early part of his education under an uncle at Milan, he accompanied him to Rome in 1525, and ftiared in the calamities which attended the fack and pillage of that city. At Padua, whither he afterwards removed, he ap- plied himfelf with diligence to the ftudy of mathematics and philofophy. Returning again to Rome, he formed an inti- mate acquaintance with feveral perfons of diftinguifhed cha- rafter, and fo much ingratiated himfelf with pope Pius IV. that he was offered the arclibiftiopric of Cofenza, which he dechned for himfelf and obtained for his brother. From Rome he retired to his native country, where he maiTied in advanced age, and for a fiiort time became profefTor of phi- lofophy in the univcrfity of Naples. However, the place of his more conftant relidence was Cofenza, and here he eftabliftied an academy called Cofentiiia. He paffed the re- mainder of his life under the patronage of feveral perfons of diftinftion, particularly Ferdinand, duke of Nocera ; but af- flitled by the afTafTination of one of '.lis foiis, and by the ca- lumnies circulated againft his fchool of philofophy, he ter- minated hiB Hfe in the year 15SS. Telefio diftinguiftied him- lelf by his oppofition to the phyfics of Ariftotle, and em- ployed mathematical principles in explaining the laws of nature. Theie were tirft divulged in a work printed at Home in 1565, entitled " De Rerum Natura juxta propria TEL principia. Lib. II." and enlarged to nine books in an edition printed at Naples in 1586. The fame fyftem was main- tained in other treatifes, under the titles of " De his qua; in Aerc hunt, et de Terrig Motibus ;" « De Mari ;" " De Colorum Genere," &c. His fyftem was in its efl"ence the doftrinc of Parmenides, who taught, that the firft principles in nature, by means of which all natural phenomena are pro- duced, are cold and heat. (See Parmenides and Eleatic.) Teletio's theory is thus developed : " Matter, which is in itfelf incapable of aftion, and admits neither of increafe nor diminution, is afted upon by two contrary incorporeal prin- ciples, heat and cold. From the perpetual oppoiition of thefe, arife the feveral forms of nature : the prevalence of cold in the lower regions producing the earth and terreftrial bodies, and that of heat in the fuperior regions, the heavens and celeftial bodies. All the changes of natural bodies are owing to this conflid ; and according to the degree in which each principle prevails, are the different degrees of denfity, refiftance, capacity, moifture, drynefs, &c. which arc found in different fubftances." This fyftem is founded on the fanciful converfion of mere attributes and properties into fubftaiitia! principles. For lord Bacon obferves, that Te- lefio, no lefs than Plato and Ariftotle, places abftraft notions at the bafis of his fyftem, and produces his world of real beings from non-entities. This eminent pLilolopher, how- ever, charafterifes him as a lover of truth ar.d a benefaftor to fcience ; and one who prepared the way for fubfv-quent improvements. After his death, his writings, as containing " innovations," were put into the Index Expurgatorius of the Inquifition. His philofophy, neverthelefs, had many advocates, among whom was CampancUa ; and his works were republiftied at Venice, in 1590, by Antonio Perfio, who wrote a compendium of his philofophy in the vernacu- lar tongue. Telefio's ftyle was more poliftied than that of other philofophers of his time ; and he intermixed fome Latin verfes of conCderable eloquence. Brucker by En- field. TELESPHORUS, in Mythology, a deity invoked by the Greeks for health, together with Efculapius and Hygeia. The figures of thefe three divinities occur on feveral me- dals ; and on fome we have Telefphorus with Efculapius alone, and on others with Hygeia. The figure of Telefphorus is invariably the fame, viz, that of an infant clothed with a fort of cloak without fleeves, which enfolds its arms, defcends below the knees, and has a kind of hood or cowl covering its head. Montfaucon has given a particular defcription of this deity, the worihip of which is fuppofed to have paffed from Epidaurus to Rome, with that of Efculapius. TELETiE, among the Ancients, were folemn rites per- formed in honour of Ifis. TELETZKOI-Ozero, in Geography. See Altin. Teletzkoi Mountain, deriving its name from the lake Teletzkoi-ozero, one of the greateft eminences of the Altay mountains (fee Altai), and from which the river Oby ifTues. It forms, with its lofty fummits, the boundary be- tween Siberia and the Soongarey, ftrikes its powerful ridges down between the lake and the Katunia ; and after having turned round the eaft fide and the lake, unites with the Ku- netzkoi mountains. This divifion is one of the greateft, but at the fame time the coldeft and moft inacceflible, of all the Altaian ore -mountains ; hence ■ it is, that its quality and contents are little known. This, however, is certain, that very powerful granite and porphyry mountains are in its range, and that the earth near and upon it yields jafper, flint breccia, hornfchiftus, white (probably faline) thalk-ftone, coloured marble, black fchiiius, marie, fand-ftone, and in thefe TEL T E L tliefe tliere are iron, argontaccous copper, and lead ores, naplitlia, afphaltus, &e. The mountains to the right of the Katunia feem to be pai-ticularly rich in ores. TELEUTES, or Telengutes, a trihe of Tartars, who are fuppofed to have derived their name from the lake Te- legul in the Altay mountains. They are alio denominated by the Ruffians the wiiite Kalmucks, becaufe they formerly lived among the Soongarians. Abulgafi reckons them among the Mongohan races ; but as their fpecch is manifeftly a corrupt Tartarian, their origin may more confillently be de- rived from that nation. In the year 1609 they did homage for the firft time to the Ruffian empire ; but it was not till towards the middle of the 1 7th century, when fome ftems of them removed higher up the Tom, that they became pro- perly fubjefts of Ruffia : the greater part of them, however, remained with the Kalmucks. Tiie former dwelt partly in the Tomn in yf/i/onomy. See Earth. TELMARA, in Ancient Geography, a town of Afia Minor, in Caria. TELMEEN, T E M TELMEENjin Geojrraphy, atownofAhlca, in the country of Saliaia, anciently called Alnissna ; 50 miles W. of Gabs. TELMES, a town of Morocco; 15 miles from Safi. TELMISSUS, \n ylnciiHt Geography, a nainc given to three towns in Afia Minor, one at the diflance of 60 (ladia from HalicarnalTus, in Lycia ; fituated at the S.E. part of the gulf of Glaucus, 2^ leagues N.E. of the promontory TelmefTiis, and nearly S.Vf. of the mouth of the river Glaucus. Its inhabitants were famous for their flcill in augury : this town had a very fine theatre : — the fecond was in Caria, and the third in Pifidia Alfo, a mountain of Afia Minor, in Lycia. TELO Martius, a port of Gallia Narbonnenfis. See Toulon. TELOBIS, a town of Spain, in the Tarragonefe, be- longing to the Jaccatani. Ptol. TELOBO, in Geography, a fmall ifland in the Eaft Ir.dian fea, near the weft coaft of Gilolo. S. lat. t° 6'. E. lor.g. 127^ 15'. TELON, a name given by the chemifts to fire. TELONiE, TO.mou, among the Athenians, farmers of the public revenues : for the feverity with which they were handled, in cafe they failed, fee Potter, Archasol. Gr^c. lib. i. c. 14. torn. i. p. 81. TELONIUM. See Thelonium. TELONtUS, Salto, in ^Indent Geography, a river of Italy, in the country of the Sabines. It Iprang towards the S. of Carfeoli, and ran N. to difcharge itfelf into the Velinus. TELOPEA, in Bolany, from TnAw-o-, confpiciious at a diflance, a name very fuitable to this magnificent fhrub, with its fine fcarlet flowers. — Brown Tr. of Linn. Soc. v. 10. 197. Prodr. Nov. HoU. v. i. 388. Ait. Hort. Kcw. V. I. 212 Our Embolhrium fpeciojijjtmum, with E. trun- tatum of Labill. Nov. HoU. v. i. 32. t. 44, conftitutc this genus. See Emeotiirium, from which we are unwilling to feparate them, for the reafons given under OnEOCALLls. The extremely clofe natural affinity, and great refemblance, of thefe plants to each other, makes us miftruft even the technical charafter of the lateral y//^ffM (omitted indeed in Hort. Kew.), fuppofing that organ to be really terminal in Emhothrium, ivhich on a careful infpettion we find reaion to doubt. The efficient part of the ftigma in E. coccincum is certainly oblique. We willi to learn, rather than to diftate, but we cannot confide implicitly in the moft able guide. TELOS, PiscoplA, in Jncicnt Geography, an ifland of the Archipelago, fituated S.E. of the ifle of Cos, and N.W. of that of Rhodes. Phny fays that it was cele- brated for its perfumes. TELPAH, in Geography, a town of Hindooftan, in Bahar ; 40 miles S.S.W. of Patna. TELPHUSSA, in Ancient Geography, a town of the Peloponnefuo, in Arcadia, upon an eminence, at tome dif- lance from the river Ladon, S.E. of Trophjea. A temple of Ceres was fituated near this town, in which fhe was honoured under the name of Lufia. TELUMNUM, a town of Aquitanic Gaul, on the route from Aqu;e Tarbellicx to Burdigala, between Cxquofa and Salamacum. Anton, llin. This is the fame with Tellonum. TELWAllAH, in Geography, a town of Hindooftan, in Agimere ; 25 miles N. of Biiddakano. TEMA, a town of Africa, in the kingdom of Ningo, on the Gold Coaft. TEMACHIS, in Natural Hijlory, the name of a genus of foffils, of the clafs of the gypfums ; the charafters of which are thefe : it is of a fofter fubftance than many of the other genera, and of a very bright and ghttering hue. The name is derived from the Greek Tstiaxoc, frujiulum, a fmall irregular fragment ; the bodies of this genus being T E M compofcd of an alTemblage of multitudes of irregiiLir flaky fragments, as arc all the gypfums ; but no genus of them fo vifibly as thefe. Hill. See Gypsum. TEMA LA, Nkgiiais, in Ancient Geography, a mari- time town of India, on the wellcrn coaft beyond the Ganges, S. of Beraboiina, where the coaft turns towards the E. at the W. mouth of the river Sabaracut. Alfo, a river of India, the mouth of which was near Berabonna* and the promontory of Tcmala. TEMAN, ill Commerce, the name of a dry mcafurc at Mocha, iu Arabia, coiitai:iing 40 mecmeda* or kelias, and weighing in rice 168 lbs. avoirdupois. TEMANIK, in Geography, a town of Porfia, in the province of Kerman ; 25 miles S. of Maftih. TEMAPARA, in Zoology, the name of a peculiar fpecies ot lizard, called alfo tejwuacu. It approaches much to the nature of the iguana, but is black, fpotted with white. TEMBA, in Geography, a proWnce of the kingdom of Angola. TEMBA RE, a town on the weft coaft of the ifland of Celebes. S. lat. 1° 27'. E. long. 119° 20'. TEMBASA, in Ancient Geography, a celebrated town of Greece, in the Peloponnefus. Pliny. TEMBEN, in Geography, a town of AbyfTinia j 100 miles E.S.E. of .Sire. TEMBLEQUE, a town of Spain, in New Caftilc ; 13 miles E.S.E. of Toledo. TEMBRIUM, or Tymbrium, in Ancient Geography, a town of Afia, in Phrygia. TEMBROGIUS, a river of Afia, in Phrygia, which ran into the Sangarius. TEMBRUS^ a town of the ifland of Cyprus. TEMBUL, in Botany, a name ufed by fome authors for the plant called betel. TEMDE, in Geography, a river of England, which runt into the Severn, 2 miles above Ludlow. TEMDEGUE Kiamen, a poft of Chinefc Tartary ; 10 miles S.E. of Tcitcicar. TEME, or Team, a river of England, which rifes in the county of Radnor, and runs into the Severn, 2 miles below Worcofter. TEMEH, a town of Egypt, on the left bank of the Nile ; 9 miles N. of Tahta. Temeh Iffebag, a town of Egypt ; 1 2 n\iles N. of Fayoum. TEMELET, a town of Morocco ; 70 miles W.S.W. of Morocco. TEMELO, in Ichthyology, a name ufed by fome for the filh called in Englifli the grayling, and in fome places the umber. TEMEN, in Geography, a town of Arabia, in the pro- vince of Nedsjcd ; 80 miles S.S.E. of Jamama. TEMENDEFUST, or Metafust, a town of Algiers ; 10 miles E. of Algiers. TEMENEH, a town of ACatic Turkey, in Natolia j 52 miles W.N.W. of Sinob. TEMENI, a town of the ifland of Candia ; 6 miles S. of Candy. Temeni Porta, in Ancient Geography, a fmall town of Afia Minor, in Lydia. TEMENIA, a town of Afia, in Phrygia, on the con- fines of Lycaonia. TEMENIUM, a fortrcfs of the Peloponnefus, on the confines of the Argolide. Here were two temples, one dedicated to Neptune, and another to Venus. TEMERICUS Ar.ER, a fmall country of G.-Ulia Nar- bonnenfis, towards the fource of the Rhine. TEMES, io Geography, a river of Hungary, which rifes in T E M in the fouth-eaft part of the mountains, and run we fhould 'not find a true third major in defcending, or a fixth minor in afccnding, unlefs we intro- duced Fb and Cb. And in like manner, tranfpofitions to G« and Eb would oblige us to introduce B* and Cb. Nor would even this fuffice, for if neceffity required a tranf- pofition from the key of C to that of D *t, wo fhould not find a true third major without introducing F** and r. So that at laft we fhall come to a temperate fyftem, where, in afcending, the notes C, D, F, G, A, would each have its fliarp and double fharp, and the notes B and E each a fingle Iharp. In defcending, the notes E, D, B, A, G, would each have their flat and double flat, and the notes F and C each a fingle ilat. And tlius the oftavc would be divided into 3 1 intervals, whofo defignations are C Dbb C* Db C«« D Ebb D« Eb D»« I 234 56 789 10 E Fb E» F Gbb F* Gb F*« G II 12 13 14 15 16 17 iS 19 Abb G* Abb G«f« A Bbb A* Bb 20 21 22 2^ 24 25 26 27 A«;* B C B* C. where the letters C, D, E, 28 29 30 31 F, G, A, B, fignify the common diatonic notes : thofe marked with a fingle * or b are the chromatic ; and thofe marked « ith a double * * or b b arc enharmonic notes ; fo called, becaufe the interval between them and the next dia- tonic note is an enharmonic diefis ; for which rcafon, the notes E*, Fb, and B «, Cb» arc alfo enharmonic. But even in this divifion of the oftave, all the notes would not have a third major in afcending and defcending : thus, for inftance, D** has no third major ; for this would be F***, which is not in the fcale, nor can any number of additional notes fuffice in all cafes. But this inconvenience is cafily reme- died, and the fyftem confiderably improved, by making all the thirty -one intervals equal. We have already obferved, that in the TEMrERAMENT. the common temperament, the femitones major and mmor ex- ceed the truth by a quarter of a comma, and that the enharmonic dicl'is is preferved true. Hence it follows, that the hype- rochc, or difference between the chromatic and enharmonic ditfis ; for example, the interval between Fb and £«, or Db D and C», &c. will alfo exceed the truth by a quarterof a comma. Now the hyperoche.by our table under Interval, is equal to 1.37695, to which adding a quarter of acomma = 0.25000, we have 1. 68695, whichdiffcrs fromtheenharraonicdiefis 1.90917 only by 0.28222, or about ,'r of a comma. Neglefting this fmall difference, let us fuppofe all the thirty-one intervals of the oftave equal, it will follow that tranfpofitions to all the notes of the fyftem, whether diatonic, chromatic, or enhar- monic, will be equally good, and differ only in pitch or tone, as they ought, but not in accuracy, which muft next be examined. The divifion of the oftave into thirty-one parts may be con- veniently done by logarithms. Under the article Interval, I find the logarithm of the oftave = 55-79763 commas ; confe- quently each diefis, or divifion of the oftave, — 1.79992 comma; hence the fifth, being 18 diefes, will be 32.399 commas. Now the true fifths being 32.640, the fifth con- sequently in this temperament is deficient by 0.241 parts of a comma, which is lefs than a quarter of a comma byTTn part; and therefore this fifth will, ftriftly fpeaking, be better than that of the vulgar temperament by -rrir of the comma ; but this is infenfible. Next, proceeding to examine the third, we (hall find it equal to 10 diefes or divifions, that is, 17-999 commas; and the true third major being 17-963 commas, the difference is 0.036, that is, about A of a comma. Now as the ear can bear a fifth, altered by a quarter of a comma, it will much more eafily bear the alteration of -jV of a comma in a third major. Again, in this temperament the third minor is indeed, flriclly fpeaking, worfe than in the vulgar, which differs from the truth but a quarter of a comma, whereas here it diflFers by about -^ oi i comma more ;. but then this difference is infenfible. Thus we have been led from the confideration of the vulgar temperament, to the invention of the temperament which divides the oftave into 3 1 equal intervals, commonly called Huygens's temperament. This great mathematician was, indeed, the firfl who gave a diflinft account of it, and Ihewed its ufe and accuracy. But here, as in many other inventions, we find the hint of the thing much older than the true knowledge of it. See Huygenii Opera omnia, vol. i. p. 748, 749, edit. I. Lugd. Batav. 1724. The divifion of the oftave into 31 parts was invented in Italy about 300 years ago, by Don Nicola Vincentino. The title of his book is " L'Antica Mufica Riddotta alia Modema Prattica, &c." Roma, 1555. fol.; and an inftru- ment, called archicembalo, was made upon this fcheme, as Salinas informs us, who at the fame time condemns it, as very difagreeable in praftice. But this could be owing to nothing but its not being tuned according to the intention of the inventor. For if aU the thirds major of this inftrument were made perfeft, and the fifths diminifhed by a quarter of a comma, it is evident that the inftrument would be equally exadl with any tuned according to the vulgar temperament, and would fuffice for tranfpofitions to any diatonic or chromatic notes, though not to all the enharmonic, as D*«, &c. be- caufe we fhould not find its third major. And if the in- ftrument were tuned according to-Jltf. Huygens's fcheme, of making all the divifions equal, it vpould then have all the 31 keys equally good, and very near the truth. See Salinas, lib. iii. The title of his work is " Francifci Salinje BurgenCs de Mufica Libri Septem," Salmanticas, 1577, fol. Meri^ennus's work is intitled " Harmonicorum, Libri XII. authore F. M. Merfenno Minimo, Lutetiae Parifiorum," 1648, foL He publifhed another book before this, the title of which is " Harmonie Univerfelle, contenant la Theorie et la Pratique de la Mufique," Pai-is, 1636, fol. 2 vols. Hence it is plain, Salinas and Merfennus had not fuf- ficiently examined this matter. The ufe of this temperament of M. Huygens deferves to be introduced into the practice of mufic, as it will facilitate the execution of all the genera of mufic, whether diatonic, chromatic, or enharmonic ; nor does the multiphcity of its parts render it impracticable, the author affuring us that he had a harpfichord made at Paris with fuch divifions, which was approved of and imitated by fome able muficians. Merfennus alfo gives a fcheme for this purpofe ; and Salinas fays he faw and played upon fuch an inftrument. See alfo Don Vincentino before cited, lib. v. p. 99, &c. M. Huygens, to facilitate the tuning of inftruments with fuch divifions, has given us a table of the parts of an oftave, according to his fyftem, together with their logaritlims. The table is as follows : The divifion of Tlie divifion of the 0(5^ave into tht offave acconi- in:; to tlie com- 3 1 equal parts. iioiilemperauieni. I. II. III. IV. V. VI. N. 97106450 4.6989700043 50000 Ut^ c 50000 4.6989700043 4-7086806493 S1131 4.7183912943 52278 4.7281019393 53469 Si B' 53499 4.7283474859 4-7378125843 54678 4.7475232293 55914 Sa B 55902 4.7474250108 4.7572338743 57179 * » 57243 4-7577249674 4-7669445193 58471 4.7766551643 59794 La A 59814 4.7768024924 4-7863658093 61 146 4.7960764543 62528 # « 62500 4.7958800173 4.8057870993 63942 Sol" G" 64000 4.8061799740 4.8154677443 65388 4-8252083893 68666 Sbl G 66874 4.8252574989 4.8349190343 68378 4.8446296793 69924 4-8543403243 71506 Fa^ F> 71554 4-8546349804 4.8040509693 74122 4.8737616143 74776 Fa F 74767 4.8737125054 4-8834722593 76467 4-8931829043 78197 4-9028935493 79964 Mi E 80000 4.9030899870 4-9126041943 81772 4.9223148393 83621 Ma Eb 83592 4.922I675I19 4-9320254843 85512 * « 85599 4.9324674685 4.9417361293 87445 4-9514467743 89422 Re D 89443 4.9515949935 4-961 1574193 91444 4.9708680643 93512 * * 93459 4.9706225184 4-9805787093 95627 Ut' C" 95702 4.9809224750 4.9902893543 97789 4.9999999993 1 00000 1 Ut c lOOCOO 5.00COOOOOOO The fecond column of this table contains the numbers expreffing the length of chords making 31 equal divifions, the longeft, anfwering to C, being fuppofed to be divided into 100,000 parts. In the third column are the fyllables by which the notes are ufually named in France ; and the afterlfc * /hews fome enharmonic notes, of which that near yo/ is moft necelTary. In the fourth column are the letters commonly ufed to denote the found of the odlave. The TEMPERAMENT. Tl.e numbers of the fccond column were found by means of thofe in tlie firft, whicli arc tlieir rclpedlive logarithms ; and thcfewerc found by dividing 0.30102999566, the loga- rithm of 2, by 31. The quotient 97106450 is marked N, and being continually added to the logarithm of 50000, that is, to 4.6989700043, gives all the logarithms of tlic lirft column to the greatefl 4.9999999993. wliich being ex- tremely near to 5.0000000000, the logarithm of looooo, thews the operation to have been rightly performed. The fifth column (hews the lengths of the chords in the common temperament ; and the fixth column contains their refpeftive logarithms. Vide Huygenii Opera, vol. i. P- 752. 753- The learned author of this temperament has not given the notes anfwering to all the divifions of the oftave ; but that may eafily be fupplied from what lias been faid above when we derived this temperament from the confidcration of the common. As Huygens has not given the names of all the intervals that occur in his temperate fcale, we (hall here infert them in the oilave, from C to c, with their refpeftive meafures in the commas, and tenths of a comma Intervals. N allies. Meafures. ''Dbb 1 . Diminifhed fecond,extreme' flat fecond, or enharmonic • 1.8 diefis. C« 2. Semitone minor, or chro-' 3-6 matic diefis. j Db 3. Flat fecond, or femitone ) major. J S-V c«* 4. Double femitone minor. 7.2 D 5. Second, or tone. 9.0 Ebb 6. Diminifned third, or ex-") treme flat third. J 10.8 D« 7. Superfluous fecond. 12.6 Eb 8, Third miner, or flat third. 14.4 D«« 9. Extreme fuperfluous fecond. 16.2 E 10. Third major, or Iharp third. 18.0 Fb II. Diminiflied fourth. 19.8 E« 12. Superfluous third. 21.6 F 13. Fourth. 23-4 0 *-• Gbb 14. Extreme diminifhed fifth. 25.2 u J F* 15. Falfe fourth, or tritonus. 27.0 6 Gb 16. Falfe fifth, or femidiapente. z8.8 ti F*i>* 17. Extreme fuperfluous fourth. 30.6 G 18. Fifth. 32-4 Abb 19. Diminiflied fixth, or ex-' treme flat fixth. 34-2 G« 20. Superfluous fifth. 36.0 Ab 21. Flat fixth, or fixth minor. 37-H G*« 22. Extreme fuperfluous fifth. 'sg-'^ A 23. Sharp fixth, or fixth major. 41.4 Bbb 24. Diminiflied feventh, or ex-1 treme fiat feventh. C 43-2 A* [25. Superfluous fixth. 45.0 Bb 26. Flat feventh, or feventh' 46. S minor. A»» 27. Extreme fuperfluous fixth. 4S.6 B 28. Sharp feventh, or feventh' major. 50.4 «b 29. Diminiflied oAave. 52.2 B* 30. Superfluous feventh. 54.0 c 31. OAave. 55.8 Vol. XXXV. The temperate diefis cnharmonica of Huygens iieiiig i.R coniina, nearly, which is eafdy remembered,' the meafurc of any interval in the oftave may be found by multiplying it by the luimber denoting the place of that mterval. Thus the fixth minor, being the twenty-firfl; interval, will be = 1.8 X 21 = 37.8. The odave, being the thirty-firft, will be = 31 X 1.8 = 55.8, which does not differ from the truth by more than 0.00237, that is, not by t.-aU T E M fhull have a tempcmment known by tlie modenis under the name of Huvgcns's tniipiranunt. Dr. Pepufch, in I'hil. Tranf. N^ 4«i. p- 273- S''"-' ^^^'^ '"■'"^''-' I^'e-"'*''- Such was the hiftorv and theory of temperament about half a cenlurv ago. But as our k. yed and « md inftruments kave extended their compafs and powers, and all the ancient Jaws of relative modulation ai-e difrepjarded by modern com- pofcrrs, moft practicul muficians inclme to equal harmony, in which .-ill the keys participate of the impcrfeftion of the fcale when the oftave is confined to twelve fcmitones, ot which every one occafioiiallv ferves for two or three dif- ferent purpofes. As the note A natural, for inftance, is fometimcs B double fiat, and fometimes G double fhaip, E natuml is oblij^ed to officiate for D double (harp, and fometimcs for F flat. There' are, however, theorifts who calculate, but never liften, and who think temperament an abomination, a deadly fin againft Pythagoras and his triple progrejfion. Now as it is generally agreed that tlie ancients had no fimultaneous harmonv, or muiic in parts, and allowed of no confonances but the unifon, oftave, 4th, and 5th, they did wifely to make them as perfcd as poffible ; but fince the invention of counterpoint, and new inlhuments of fixt tones by keys, frets, and additional ventages, which furnifh but tT\-elve femitoiies, wliereas thirty-one different founds are wanting to fupply two diftinft founds for fynonimous notes, fuch as A « and B b, C « D b, D « E b, &c. tempera- ment, though it a little diminifhes the perfeftlon of certain notes, the whole inftrument is bettered by it, and rendered equally fit for all keys. Every concord, except the unifon and oftave, has a latitude, and allows of bearings without offending the ear. A perfeft 5th makes an intolerable major 3d below it. And as the 3d, though called an imperfeCl concord, is the mofl grateful and pleafing of all the concords when pcrfeft ; contrapuntifls do wifely to allow tuners to rob 4ths and 5tlis of a little of that perfec- tion which they can fpare without injury, for the good of the whole. If the learned harmonift, the abbe Rouffier, is living, this relaxation of Pythagorean difcipline, and \vant of due refpeft for the triple progrejfion, will, we fear, diilurb and render him fomewhat intemperate in cenfuring our aljurdiiy. We have always regarded mufic as an objeft for the ear, and wifh to make it as pleafing to that fenfe as poffible ; and have been fo long accuftomed to tempered fcales, as to re- ceive more pain than pleafure from inufic performed on an inftrument tuned by perfcft 5ths throughout, that is, by the triple progrejfion. We fhall, however, prcfcribe no ex- clufive methocT of tempering the fcale ; as almoft every man who tunes his own inftrument has a fyftem of his own : we fliall only obferve, that the greateft muficians in the courfe of their lives have often changed their method. In our cathedrals and parifti-churches in general, where the natural keys are made as perfeft as poffible, at the expence of A b, D b, F*, and C*, keys that have never been admitted within the pale of the church, organifts that hear little other mufic, are extremely offended by equal parti- cipation of the fcales, when the pure harmony of their favourite keys is deformed by temperament : and thofe ac- cuftomed to the levelling fyftem of equal harmony, on the contrary, hold the ivolf in as much abhorrence, as they would the deftruftive wolf in the Gevauden. At prefent, our tuners mitigate the extremes of equal and unequal temperament, by favouring the natural keys, and making the extraneous or tranfpofed keys fomewhat lefs perfeft ; but devoting the wolf to total deftruftion. It is imagined by many, that the charafter of keys, par- T E M ticularly the minor, depends on the imperfeftion of the fcales, occafioned by unequal temperament : as F minor h plaintive, E b folemn, and E * brilliant. But though the difference between the pitch of E b and E*, D* and E b, is but half a note, whatever may be the general pitch of the inftrument, whether lialf a note too high, or half a note too low, tliefc keys ftill retain their character, it fliould feem not from the tuning or elevation of the general fyftem, but from fomething for which we are unable to account. See Music, and Sound. TEMPERATE Zon-e. See Zone. TEMPERATURE, in general, denotes the degree of free caloric which a body appears to poffefs when com- pared with other bodies ; or, in other words, the ftate of a body in relation to its capability of producing in other bodies the elTefts arifing from the prefence of free caloric. Sir Humphrey Davy defines temperature to be " the power bodies poffefs of communicating or receiving heat, or the energy of repulfion." But this definition appeai-s to us to be a little ambiguous, for temperature is not a term indicative of a pofitive faculty in bodies, as this defi- nition may be underilood to mean ; but, as before obferved, is merely a relative term, expreffive of the degree in which bodies, in conformity to the grand law of the equal dif- tribution of free caloric, can affeft, or be affefted by other bodies of a lower or higher temperature, that is, potreifing more or lefs free caloric than themfelves. There are two means of meafuriiig the temperature of bodies, namely, by our fenfations, or by the different degrees of expanfion produced in bodies on being fubjefted to dit- ferent degrees of free caloric. The firft of tliefe, from various obvious caufes, is fo imperfeft and limited, that no dependence can be placed upon it as a meafure of tem- perature. The fecond is much more regular and extenfive, and is, therefore, always at prefent employed. " When two bodies produce the fame increafe or diminution of volume in a third body, to which they are equally applied, they are faid to be of the fame temperature ; and any body is faid to be at a higher or lower temperature, as it produces a greater or lefs expanfion in another body with which it is in contaft." Inftruments founded upon the principle of the expanfion of bodies by heat, and deftined to meafure degrees of temperatm-e, are called thermometers, or, when the temperature is very high, pyrometers; which fee. Under the fame heads alfo the important queftion is dil- cuffed, how far the expanfion of bodies by heat is to be confidered as an indication of their real temperature. See alfo Caloric. TempEiIATURE of the Atmnfphere. See ATMOSPHERE. Temperature of Climate. See Climate. Temperature of the Earth, is that degree of fenfible heat which exifts on the furfape, or in the interior of the folid part of the globe. The temperature of the atmo- fphere is frequently defcribed as the fame with the tem- perature of the eai-th, from which it is effentially diftinft. The fenfible heat of the atmofphere varies with the latitude, the feafon, and the elevation of the place in which the obfer- vation is made. The fuperficial temperature of the earth varies alfo with the latitude and the feaion, and in a ftill greater degree if the land be dry ; but the internal temperature of the earth appears to be permanent in each place throughout the whole year. At a certain depth under the furface, the thermometer always indicates the fame degree of heat ; and the difference between the permanent internal temperature in different latitudes, is much lefs than that which exifts at the furface. The depth at which the thermometer remains ftationary about latitude 52°, is 80 feet : nearer to the equator. TEMPERATURE. equator, or the poles, a greater depth would be necefTary to obtain the permanent temperature. At ftill greater depths, probably, the temperature under each degree of latitude is the fame all over the globe, except in the vicinity of vol- canic fires. M. Volney, in his travels through North America, fpeak- ing of the temperature of the earth, endeavours to oppofc the opinion ol its permanent internal temperature. Setting out from la.ke Superior, he fays, and proceeding weft to the Stoney mountains, and travelling north as far as latitude 72°, the country now well known to the Canadian traveller, difplays a climate that for feverity of cold can be compared only to Siberia. From latitude 46", the earth is frozen during the whole year. At fevcral trading pods between latitude 50" and 56°, it was found impofiiblc to have wells. Mr. Shaw had attempted to dig one at the poft of St. Au- guftin, about forty miles from the mountains ; but though it was in the month of July, the ground was frozen at the depth of three feet from the furface, and as it grew harder he was obliged to give up the attempt. He relates alfo an account of Mr. Robfon, an Englilh engineer, who at- tempted to fmk a well at Prince of Wales's fort, lati- tude 59°, in the month of September. He firll found thirty-fix inches of earth thawed by the preceding warin weather, then a ftratum of eight inches frozen as hard as a ftone ; under this a flratum of fandy friable earth, froily and very dry, in which his borer could find no water. The celebrated traveller Ledyard, fays Volney, affirms, that at Yakutllc, not io high as latitude 62°, wells of water cannot be obtained, becaufe it is found by experiment that water freezes at the depth of fixty feet. From thefe cir- cumftances, M. Volney would infer that the internal part of the earth is in a conftant ftate of congelation. Some of the above obfervations, we believe, were inaccurately made ; and it has been too haftily determined, that the earth is frozen during the whole year in Nortli America, even in latitude 46°; for this is not the cafe 11° further north. We have been favoured with the following ftate- ment from an intelligent medical gentleman, who was iome years refident in Hudfon's Bay. " On digging a well at York fort, Hudfon's Bay, latitude 57° 7', in the beginning of Oftober, the following circumftances were remarked. About thirty inches from the furface, a bed of frozen earth, about twilve inches thick, was met willi ; below was a bed of loofe fandy clay, about half a yard thick, which was fuc- ceeded by a bed of the fame clay, rendered perfeftly hard and folid by troft. Sinking lower, ilmilar beds of frozen and loofe earth were found, alternating with each other ; the frozen beds, however, conftantly decreafing in tliicknefs, though not regularly, and at a certain depth they feemed to difappear entirely. Thefe frozen ftrata are confidered by the inhabitants as indications of the feverity of the preceding winters, each ftratum being fuppofed, with much proba- bihty, to be formed in different years, and to be travelling downward until they are thawed by the internal temperature of the earth. The procefs by which they fink down may be explained, on the fuppofition that the upper furface is diminiftiing by heat during iummer, and the under furface increafing by the congelation of moifture in contaft with it. Another circumftance, wliich took place in the fame latitude, may ferve to elucidate the obfervation of Ledyard, that the water was conftantly frozen at fixty feet under the fur- face at Yakutflc." A well had been funk which yielded a plentiful fnpply of water during the firft fummer ; but the water, being expofed to the air, froze during the next winter, and remained frozen ever after, being too far below the furfEce to be thawed. Hence it appears that water cxifts unfrozen at a moderate depth under the furface in the coldeft climates, when it has no communication with the external air. The cffcA of the fummer heat in the fame latitude extends about feventcen inches under tlie furface, where the ground has been ftiadcd ; hut where it has been expofed to the fun, the furface is thawed to the depth of tiirec feet. From the fmall deptli to which the folar heat penetrates, we may infer that l!ie water below is kept in a fluid ftate by the internal lirat of the globe. It has been generally fuppofed, that the permaiu'nt tem- perature of each latitude is the fame nearly as the n-.eau annual temperature of the atmofphere, and that ihis is indicated by the temperature of fprings or deep wells ; but the temperature of fprings will vary with that of the ftrata near the furface through which they run.. (Sec TtM- PERATURE of springs.) It is to be regretted that more numerous obfervations have not been made on the tempe- rature of deep mines. From obfervations recently made in Cornwall, it appears that tlie temperature increafes with the depth, at leaft in lomc of the mines, and in the loweft it was not lefs than 70°. This may, perhaps, be owing to the che- mical changes which are taking place ; for it appc ars, from the evidence of the overfeers of the mines, in reply to' certain ([ueries propofed by the Royal Geological Society of Corn- wall, that the water is found conftantly warmer in the vicinity of veins of copper-ore, than it is in the vicinity, of tin-ore : the former veins are in general worked to a greater depth tlian the latter. It remains to be afccrtained wliether this incrcafe of temperature be owing to chemical caufes, or is invariable at the fame diftance from the furface. Tiie decompofition of pyrites in copper veins would feem to point out a caufe for the increafed temperature in their vicinity ; it is evident, however, that it is not derived from the folar rays. It fecms reafonable to believe, from what we at prc- fcnt know of the internal temperature of the eartli, that there exifts a permanent fource of heat within the globe, though we are unacquainted with the caufes by which it is generated. We are equally ignorant of the caufes by which light is generated on the furface of the fun : oriC operation is not more furprifing or inexplicable than the other ; nor is the difficulty removed, by fuppofing the fun to be furrounded with a luminous atniofphere. Some philofophers have maintained the opinion, that the earth has been conftantly growing colder fince the period when it was firft inhabited, and that the organic remains of elephants and other animals, (fuppofed to be fimilar to thofe of tropical climates,) which are found in Siberia, offer a demonftrative proof, that the arftic regions once enjoyed the _ tempe- rature of the torrid zone. It has fince been afcertained, by the elaborate refearches of M. Cuvier, that thefe animals were not of the fame fpecies as the African or Afiatic elephant. A moft convincing proof of this was afforded by the entire body of one of thefe elephants, which was difcovered imbedded in ice near the mouth of a river in the north of Siberia, by a Tungnfian fiftierman, in the year 1799. It firft prefented a ftiapelcfs mafs projt fling from an ice -bank. Two years afterwards he could diftir.clly fee that it was the body of an enormous animal ; tlie entire flank and one of its tuflis had become difengaged from the ice. In 1803, the ice beginning to melt earHer than ufual, the whole body was difengaged, and fell from the ice-bank on the fandy (liore. In 1806, Mr. Adams went to examine this animal, which ftill remained on the fand, but its body was much mutilated. The flcin was extremely thick and heavy, and as much of it remained as required the exertions of ten men to carrj' away. More than thirty pounds of the hair and briftlcs of the animal were colkfted. Some of this 6 TEMPERATURE. this hzlr was prefentcd to the Mufoiim of Natural Hiftory ill Paris. It coiilifts of three dillinft kinds. The one is fliff black, briftles, a foot or more in length ; another kind is a coarfe flexible hair, of a reddilh-brown colour ; the third kind is a coarfe wool, whicl\ grow among the roots of the lonj hair. Thcfe afford undeniable proof, that this animal belonged to a race of elephants inhabiting a cold region, and was not fitted to dwell in the torrid zone. This animal was a male, and had a long mane on its neck. The bones were all perfect. As the only proof offered for the refrigeration of the earth was tlie former exillcnce of tro- pical animals in northern latitudes, and as this can no longer be maintained, we have reafon to believe that the general temperature of the globe is llationary, though the chmate of particular countries may vary at different periods, from cultivation, the dcftrudion of large forclls, or other local caufes. Though the annual changes in the temperature of the climate affeft the furface only to a fmall comparative depth, yet the continued effeft of the annual mean temperature, confidered as a permanent caufe, may be fufficient to keep the internal temperature of the earth tlationary, in each latitude, at a ftill greater depth. Hence we find that the internal temperature of the earth, and the mean temperature of the atmofphere, are nearly, but not exaftly, the fame ; for in all northern countries, the mean temperature of the earth is higher than that of the air, and the difference, ac- cording to the obfervations of Dr. Wahlenberg, fellow of the Royal Society of Stockholm, appears to incieafe as we advance northward, or as the cold of the winter becomes mora fevere. This would alfo feem to give additional con- firmation to the opinion, that there is a permanent fource of heat within the globe itfelf. The following table fhews the rate at which the temperature varies according to the latitude. Latitude. Temp, of the Earth. Mean Temp, of theAimofphere. Berlin - - - Carlftrom - - Upfala - - - Umen ... Degeforts - - 52-5° 56.25 60. 64. 64.25 49.28° 47-3 43-70 37-22 36.68 46-4° 42.03 33-38 The obfervations were made on fprings which threw up a large quantity of water at a permanent degree of tem- perature in all feafons. It is to be regretted that wc have not a feries of obfervations made with equal care in fouthern latitudes. M. Volney dates, in his " Travels in America," that the mean temperature of wells forty-five feet deep was as under : Charleftown Virginia Philadelphia Maffachufetts Vermont Fahr. 63° 57 53 49 44 This depth is too fmall, to give the true mean temperature of the earth ; and the obfervations can only be regarded as approximation! to the truth. On the fame authority it is flated, that the temperature of the earth, to a confiderable depth under the torrid zone, is 14° Reaumur, or 63° Fahrenheit. In the fouthern parts of England, the mean temperature, taken from permanent fprings, is about 48° ; at Edinburgh, ^fi ir. the north of Ireland, 48° ; and at Paris, 51 ^ For the temperature of the atmofphere, fee Atmosphere, where the mean temperature in different latitudes is given. Mr. Humboldt has lately publiihed a botanical account of the new genera and fpecies of plants difcovered in the tropical regions of America, with many intereiling obferva- tions on the temperature, as affefting the growth of plants. The plants of the torrid zone extend farther through the fouthern temperate zone than through the northern, owing^ to the greater influence of the ocean in the fouthern hemi- fphere, in moderating the rigour of winter ; the ocean bear- ing a much greater proportion to the furface on the fouth, than on the north iide of the equator. In eftimating the^ climate fuited for the growth of particular plants, the mean temperature will not afford a correft ftandard ; for though the mean temperature of the year, in the middle latitudes of North America, be the fame as it is in Europe, 7° further north, the temperature of different feafons in thefe fame latitudes by no means agrees. The winters are colder, and the fummers hotter, in North America than in Europe, In Philadelphia the fummer is as hot as at Rome or Mont- pellier, while the winter correfponds with that at Vienn*. At Quebec the fummer is warmer than at Paris, but tlip winter colder than at St. Peterlhurgh. In the north of China there is a ftill greater difference beiweea the heat and cold, than in North America. In North America, as fai- as latitude 48°, the fummer* are four centigrade degrees, or about 7° Fahrenheit, hotter than in the correfponding latitude in Europe. Between the tropics, the mean annual temperature is the fame as on tire- old continent, which may be feen in the following table, expreffed in degrees of the centigrade thermometer. OIJ Ctnthient. Nciu Continent, 27.7" 27.5 25.6 25.6 Senegambia 26.5" Cumana Madras 26.9 Antilles Batavia 25.2 Vera Cruz Mantilla 25.6 Havannah Twenty-five degrees correfpond with feventy-feven (fe» grees of Fahrenheit. Though the plants of the torrid zone extend farther through the fouthern temperate zone than through the northern, as we have before ftated ; yet to a certain diilance from the line, the temperature appears to be lefs on the fouth than on the north fide. Rio Janeiro and Havannah are nearly at the fame diftance from the equator ; but the mean temperature of the fummer and winter months in each is as under : Havannah. December 22.1° January 21.2 July 28.5 Auguft 28.8 Rio Janeiro. June 20.0° July 21.2 January 26.2 February 27.0 On the coaft of Peru, the temperature is diminifhed by the perpetual cloudinefs of the fky, and by a ftrong fea current fctting in from Cape Horn. From the tropic to 34° of fouth latitude, the mean temperature of the fouthern hemifphere fcarcely differs from that of the northern. Be- tween latitude 34° and 57°, there is a greater difference between the temperatures of fummer than of winter : the winters in the fouthern hemifphere are not colder, but the fummers are confiderably more fo than in the northern hemi- fphere. In fouth latitude 48^, the fummer temperature is the fame as the winter temperature of Toulon, Cadiz, and Rome. The higher we afcend above the level of tlie fea, and the farther we advance from the equator, the greater is the dif. ference TEMPERATURE. I.at. Cent. Tlicrm 10.27° 2.4° I9.II 2.6 23. 8 7-4 31.28 17.4 39-56 24.6 46.47 33 57.00 35 ference between tlie temperature of different feafons of the year. The following table exhibits the temperature between the hotteft and coldeft months, in different latitudes. Cumana ... Vera Cruz, Havannah Natches ... Philadelphia Quebec ... Nain ... In the temperate zone, as we advance northwards, the coldnefs of the winter increafcs at a much greater rate than the heat of the fumnier diminilhes. Thus at Enonlekis, in latitude 68° 30', the temperature of July is as hot as that of Edinburgh. Between the tropics, the temperature at no feafon of the year equals that of the fea-diore ; but in tile temperate zone, the upper currents of air are fomctimes warmer than the lower, during the winter months ; and the thermometer, on the fnmmits of hills, is occafionally three or four degrees higher than in the plains. Hence in the tem- perate zone, we find the fame plants frequently on low and elevated fituations ; but tliis is never the cafe between the tropics. In the temperate zone on the old continent, when the mean heat of the motitli is as under, the following plants bloffom : Fiilir. 42°, the Amygdalis perfica, 47, the Prunus doniellica, 52, the Betula alba. The reafon why plants vegetate with greater rapidity in Lapland and Norway than farther foutli, is owing to the increment of temperature being mucli greater, and to thp temperature of the earth in winter being feveral degrees above that of the air. From obfervations made in different latitudes, it appears that 1000 fathoms of altitude occaiion a diminution of tem- perature equal to 23° of Fahrenheit ; 50 fatlioms being nearly equal to half a degree. Mountains 1000 fathoms in height, at 46° of latitude, liave the mean temperature of Lapland ; and mountains of the fame lieight between the tropics enjoy the temperature of Sicily. The following table by Humboldt exhibits the moil re. markable circumilances refpecting tlie temperature in the three zones. The temperature is taken according to the centigrade thermometer. The fathom 6 French feet, or 6.39453 Englilh feet. Torrid Zone. Temperate Zone. Frigid Zone. Andes, Quito, Ut. 0°. Rloumains of Mexico, Lat. -20°. Caucafns, Lat. 4-2^^^ PyreiitVs, Lat. 4-2i=. Alps, Lat. J5|°io46°. Lapland, Lat. 67° to 70°. Inferior hmit of perpe-l tual fnow - -J 2460 fa. 2350 fa. 1650 fa. 1400 fa. 1370 fa. 550 fa. Mean annual heat at that") height . - -J ,10 '2 -3r -4° -6' Mean heat of vvinter, ditto ir - - - - - 10° -20i° Mean heat of Aug. ditto ■r - - - - + 60 + 9^ Diftance between trees' and fnow 600 fa. ' 350 fa. 1 650 fa. 230 fa. 450 fa. 300 fa. Upper limit of trees 1800 fa. 2000 fa. 1000 fa. 1 1 70 fa. 920 fa. 250 fa. Laft fpecies of trees to-f^ wards the fnow -J Efcilonia alftonia. Pinus Occident. Betula alba. Pinus rubra. [ Piuus P. uncin. abies. Betula alba. Upper limit of the Eri- / cineae - - - f Befariae. 1 600 fa. - Rhodod. caucas. 1380 fa. - Rhodod. Rhodod. ferrug. laponicum. 1 1 70 fa. 480 fa. Diftance between the I „ r fnow and corn -J 630 fa. 700 fa. 450 fa. In the feventh volume of the Tranfaftions of the Royal Society of Edinburgh, Dr. John Murray has pubhfhed a paper on the diffufion of heat on the furface of the earth ; in ■which he attempts to prove, from the nature of caloric, that the temperature of the earth is conftantly increafing from the folar rays, and that this temperature is becoming more equal in different parts of the earth. The atmofphere, he con- tends, conveys no heat into unlimited fpace ; our pl.inet, in relation to the difcharge of caloric from it, is bounded as it were by a wall of iron-conduAing matter. He adroit?, however, that a fmall portion of heat may be loft by radia- tion : thus, at the liotter parts of the earth's furface, there may be fome emiffion of caloric by radiation ; but this, he fays, cannot be equal to the quantity communicated by the folar rays : for of the heat derived from the latter fourcc, a portion is abforbed by the earth, and conveyed to the in- terior, as is apparent from the decreafing temperature, as we recede from the furface to a certain depth ; and another portion is carried off by the afcending current of heated air, and conveyed to cglder regions, where it is abforbed. Tiius, evcB TEMPERATURK. evfn from thofif parts of the furface of the earth where the circumilances are mod f.ivourable to radiation, the quantity radiated cannot be equal to the quantity received from the folar rays. Over the whole earth llic diffufion muft be ftill greater ; and inftead of the conclufion, that the planet dif- chargcs its excefs of heat by radi.ilion, there is every reafon to draw the oppofite cojiclufion, that part of the heat which it receives from the fun is retained. He further infers, that the temperature of the globe muft rife, from the mode in which heat is communicated to it by the fun ; and at the fame time, as it advances, mull become more equal over the whole furface. And this rife has its limits. There cannot be either unlimited increafe of heat, or unlimited refrigera- tion ; but the final refult will be a ftatc of permanence and uniformity, the continuance of which is fecured by the veiy circumftance, that if it is deviated from, this deviation muft correft itfelf by an increafe of radiation from the hotter parts, or from an increafed abforption of caloric by the colder parts of the globe. According to this theory, in procefs of time, the equatorial and polar parts of the globe will arrive at the fame degree of temperature, which wiU re- main ftationary, as there will be no circulation of heated air or water to the poles. To this reafoning we coneeive it may be objected, that it affumes, without fufficient grounds, that caloric cannot pafs from the earth into unlimited fpace, and that the folar heat does not become latent by chemical union with terreftrial fubftances. It affumes alfo, that caloric is a diftinft fpeciiic fubftance ; an opinion which is denied by fome of the moil eminent philofophers. Nor have we, per- haps, any evidence to prove that the temperature of the earth has changed fince the earlieft records of hiftory, if we except the local changes which refult from drainage and cultivation. It is well known that the climate of Europe is materially changed fince the periods of ancient hiftory, when the Danube was annually frozen, and would admit the paflage of armies over the ice. The climate of the United States of America has alfo undergone a material change during the laft century. Both thefe local changes have been produced by the fame caufe, the deftruftion of extenfive woods, and the progrefs of agriculture ; but, in- dependently of local caufes, we have no data to infer that the temperature of the globe is increafing or diminiftiing. Temperature of the Sea. The temperature of the fea near the furface is affefted by the changes of tempera- ture of the atmofphere, and by the currents which tra- verfe it. The currents which flow from the equatorial to the polar regions, fervc to equalize the heat of different lati- tudes. This is remarkably the cafe with the current called the Gulf ftream, which paffes by the fhores of Mexico, Louifiana, and Florida, and round the point of the peninfula, under the fhelter and proteaion of the Bahama illands, which break the efforts of the ocean and the current of the trade wind. This ftream, on entering the ocean, preferves its water by the velocity of its current, and may be further dif- tinguilhed by its colour and temperature. The temperature is from eleven to twenty -two degrees higher than that of the ocean. From the Floridas to Newfoundland the current continues increafing in breadth, and diminifhing in velocity. Some experiments made by Mr. Jonathan Williams, give the difference of temperature between the Atlantic ocean and the Gulf ftream as under, December, 1789. Soundings in fhoal-water, on the coaft, A httle before entering the ftream, In the ftream, .... Before reaching Newfoundland, in the ftream, At Newfoundland, out of the ftream, Beyond the banks, in the open fea. Fal.r. 60 70 66 54 60 Fal.r. On approaching the coail of England, - 48'- Capt. Billings, in 1791, found the temperatureof) ^ the lea on the coaft of America, - -J In the water of the Gulf ftream, - "77 In winter, Mr. WiUiams found the variation between the Gulf ftream and the ocean 23°; the difterence, as might be expefted, being kfs in fumraer than in winter. Thefe inqui- ries have afcertaincd another faft, from whence navigators may derive fome advantage ; for by examuiing the tempera- ture of the fea in different places, it has been found that the water is colder in proportion to its Ihallownefs ; and hence may be derived an indication of the approach to land, or to a fhoal. Out of the reach of currents, a difference always exifts between the temperature of the furface and the lower parts of the fea. In northern latitudes, the furface is fome- times warmer and fometimes colder than the lower parts ; but near the equator, the temperature of the furface may be expefted to be invariably warmer than at great depths. In all probability, the temperature of the fea is permanent in each degree of latitude, at a certain depth. Capt. Ellis let down a fea-gage in N. lat. 25° 13'. W. long. 25° 12'. He found the fea falter and colder in proportion to the depth, till the gage had defcended 3900 feet, when the mer- cury in the thermometer came up at 53° ; but the water did not gfrow colder, though he let down the gage 1400 feet lower. At the furface of the fea, the thermometer ftood at 64°. From the experiments of Capt. Douglas, near the coafte of Lapland and Norway, of which an account is given in the 60th volume of the Philofophical Tranfaftions, the follow- ing differences were obferved between the temperature of the fea at the furface, and at certain depths. Temperature at the Surface. Depth in Fathoms. Tem- perature. May 12, 7 lat. 70° 40', j 36° Fahr. 78 to 87 59° May 17, nearly the fame. 37 86 to 90 39 May 22, 1 lat. 70^32', S 37 80 39 June 29, 7 l.t. 70° 54', 1 44 98 \ 40 July 7, 7 lat. 70^45', 1 46 70 at the bottom. 44 July 8, lat. 68= 43',"] 1 2leaguesfromthe ( idand of Lofoot, ( Norland, - - ] 47 ■ 100 260 r:Ot at the bottom. 46 52 July.9, lat.65''25',] 20 or 25 leagues from the coaft of f Norway, - -j 48 { 100 210 at the bottom. 46 48 July 10, lat. 64° 40', "7 J. about 30 leagues >■ 52 from the coaft, -J '• 75 141 at the groimd. 1 45 46 From TEMPERATURE. From die above obfervations it appears, that though the fea at a moderate depth was cooler than at the furfaco during the fummer montlis in nortlieni latitudes, yet at Hill greater depths the temperature increafed, and at the depth of 260 fatlioms was 52° in July, when the furfjce was only 47°. Now this depth being below tlie immediate cffeifls of the folar rays, the temperature could only be derived from that of the globe itfelf, which appears to be fufficient to preferve the fea many degrees above the freezing point at the depth of 300 fathoms. Indeed, the temperature of the fea near the tropics, in lat. 25^ 13', at the depth of 650 fathoms, appears to be the fame as the temperature of the fea in kt. 68° 43', at little more than one-third of tliat depth, as maybe feen by comparing the obfervationsofCapt. Ellis with that of Capt. Douglas. We have hence alfo ilroiig grounds for believing, that at a certain depth, the temperature of the fea is permanent, and is the fame in every degree of latitude from the equator to the pole, though the depth may vary at which this permanent temperature would be found. . The mean annual temperature of the Itandard fituation in every latitude, as deduced by Mr. Kirwan from the Atlantic and Pacific oceans, is given under the article Temperature of the Atmosphere. But fom? exceptions to this ftandard, not there noticed, deferve to be mentioned here. That part of the Pacific ocean which lies between N. lat. 52° and 66°, is only about 45 miles broad at its northern extremity, and 1300 miles at its fouthern. It is, therefore, reafonable to conclude with Mr. Kirwan, that its tempera- ture will be confiderably influenced by the furrounding high land, as well as by the many bleak iflands fcattered through it. Mr. K. fuppofes, that from thefe circumftances the temperature is fully four or five degrees below the ftandard. Small feas furrounded by land are ufually rendered, from this circumftance, at leaft in temperate and cold climates, warmer in fummer and colder in winter than the ftandard ocean : the gulf of Bothnia, for inftance, is ftated to be generally frozen in winter, but in fummer to be fometimes heated to 70°. The German ocean is above three degrees colder in winter, and five degrees warmer in fummer, than the Atlantic. The Mediterranean fea is, for the greater part of its extent, warmer both in fummer and winter than the Atlantic, which therefore flows into it. The Black fea is colder than the Mediterranean, and flows into it. Thefe obfervations apply chiefly to the furface of the ocean : from experiments that have been made it appears, that at confiderable depths the temperature is much lower than at the furface, and that the deeper we go, the lower it becomes ; fo that fome fuppofe that, at very great depths, the water always exifts in a Hate of ice. See Kirwan's " Eftimate of the Temperature of different Climates;" alfo his " Efl^ay on tlie Variation of the Atmofphere." Temperature of Springs. Thofe common fprings which throw up a confiderable quantity of water during the whole year, have generally a permanent temperature, or nearly fo ; and this is fuppofed to repreient the mean tem- perature of the earth in each latitude ; but there are other fprings which have a much higher permanent temperature, and fome which throw up their waters at a boiling heat. The following is the permanent temperature of fome of the more celebrated warm fprings in Europe. Fahr. Matlock, - - . . 66° Buxton, - . . - - 82 Briftol, - - - - 74 Bath, - - - - j"< ' 1 1 16 Vichy, - - - - 120 Vol. XXXV. Fahr. Carlfljad, - - - - 165° Aix, - - - - 143 Borfet, - - - - 132 Bareges, - - - - 1 20 The Gcyfers or boiling fountains in Iceland, in the Azores, and in various parts of the world, have a conftant tempera- ture of 212'^. Tiie fource of heat, in fome of the latter fprings, is evidently fubtcrranean fire, as all thofe iflands are of volcanic origin, and .are the feats of aftive volcanoes at the prefent day. It is obferved of other warm fprings, that they generally rife in the vicinity of volcanic orbafaltic rocks. This is the cafe with the warm fprings of Matlock and Buxton. Rocks of bafaltic amygdaloid extend through the high peak of Derbyfhire, where thefe fprings arc fituated. Rocks of bafaltic amygdaloid, having a rtill more near refemblance to volcanic lava, extend from Worford bridge, in Gloucefterfliire, in a direftion fouthward, and, in all pro- bability, are continued under the furface to Bath and Briftol. According to Humboldt, hot fprings rife from granite and rocks denominated primary, in various parts of South Ame- rica ; and, from the permanent high temperature of warm fprings, we may infer that the fource of heat is fituated deep beneath the furface, and far below thofe caufes which can change the temperature. It has been contended by forrte perfous, that the high temperature of warm fprings arifes from the decompofition of pyritous ftrata ; but if tnis were the cafe, the waters would be ftrongly impregnated with fulphate of iron and other mineral matters, which is not the faift ; the temperature would alio decreafe as the pyritic matter became exhaufted, of which we have an analogous illuftration in the faline fprings of Cheltenham and Gloucef- ter. Thefe fprings rife in a deep ftratum of blue clay, called lias, (fee Strata of England,) which abounds in pyrites, and in animal remains ; and it is found by experience, that the fahne impregnation is greatell when the wells are tirft opened, and that the ftrength of the waters gradually declines ; oil which account, the proprietors are under the neceflity of finking frefli wells to obtain water of the requifite faline ftrength. This might be expefted ; for as the water per- colates through fiffures in the clay, the fahne matter in its vicinity is gradually wafhed away. But if the whole bed were in a itate approaching to ignition, from the decompo- fition of pyrites, the faline impregnation would be con- ftantly fupphed to the fprings ; for we cannot fuppofe any quantity of pyritous matter to exift equal to heat a whole ftratum by decompofition, without, at the fame time, gener- ating fuch an abundance of faline matter as muft faturate the waters which percolate through it. We are hence led to infer that the fource of heat in warm fprings is firbterranean fire, and as thefe fprings have not been obferved to diminifti in temperature for a period of nearly two thoufand years, we may further infer the great depth at which this fource of heat is fituated, an inference which is warranted by the con- nection which volcanoes in diftant parts of the world appear to have with each other. (See Volcano.) It may be aflced, if the fource of lieat in warm fprings be fubterranean fire, why are they not all of the fame degree of temperature i To tiiis it may be replied, that, in fome inftances, the warm fprings may W intermixed with cold fprings near the fur- face ; and in other inftances, after rifing to a certain height, they may run in an horizontal direftion for a confiderable diftance among the upper ftrata, and thus be gradually cooled. The eaufe which can raife up water from vaft depths, mull be fought for in the expanfive power of fteam, and elaftic vapours generated by heat, which we know by experience to be fully adequate to the cffeft. S f Temtera- T E M TEMPERATl'RE/or Plants, in Gardening, thf ftate of heat ill which it is necciTary to keep particular forts of them, in order to their ftriking or taking root, their healthy growth, and their fucceeding in the beS and moft proper manner. The ftate or degrees of heat, or the temperature, in all fuch cafes, mull be regulated and direftcd by the nature of the plants, their culture, and the fituations in which they are grown. For thofe in hot-houfcs and floves, the tempera- ture, in thofe of the dry ftovc kind, fliould moftly be from about fifty to fevcnty degrees, according to the natures, habits, and miuincrs of growth of the plants ; and in thofe of the moill (love kind, from about fixty to ninety degrees, as the nature of the beds and plants may be. Plants in con- fcrvatorics are kept at various temperatures between thofe of the firil kind of the above ftoves and that of the common open air. And in greenhoufes, nearly fimilar temperatures are conftantly to be preferved, in order to the raifing, and to the growth of fuch plants, in the mod fuitable and beil manner. It ii always of great utility and importance to keep the temperatures as fteady as poffible, whatever its ftate may be, in the growth of all thefe forts of tender plants. The temperatures, or ftates of heat for particular plants, are moftly given under their proper heads, in defcribing their culture. Tempekature of Milk for Cheefe, in Rural Economy, the degree of heat which is the moft proper in milk for the purpofe of making cheefe. From fome experiments which have been lately made upon the fubjeft, this temperature would fecm to be about the middle point between that of fummer and blood heat ; or, perhaps, fomewhere about ninety degrees of Fahrenheit's fcale may give the average degree of warmth which is moft proper and neceffary in the bufinefs. TEMPERING, in the Mechanic Jrts, the preparing of fteel and iron, fo as to render them more compaft, hard, and firm ; or even more foft and pliant ; according to their refpeftive occafions. Thefe metals are tempered by plunging them, while red- liot, into fome liquor prepared for the occafion : fometimes pure water is ufed for that purpofe : our lockfmiths, &c. fcarcely ufe any other. When an inftrument has been properly hardened, it is ne- ceffary to give it a certain degree of foftnefs, in order to adapt it for the purpofe to which it is to be applied. With this view, it fliould be heated again to a certain point, ufually determined by its colour, and then inftantly plunged into cold water. This is called " letting it down to the proper temper." It has been a queftion of difficult folu- tion, how the water afts in hardening iron and fteel. It is well known, fays Mr. Parkes, in his " Chemical Eflays," (vol. iv. ), that the hotter any piece of iron is made, and the more quickly it is cooled, the harder it will become in its texture ; and he fuggefts that this may be owing to the lofs of its latent heat. In confirmation of this conjeifture he alleges, that iron and fteel are generally allowed to owe their malleability to their latent heat. A compofition of divers juices, liquors, &c. has fome- times been ufed ; which is various according to the opinion and experience of the workman : as vinegar, moufe-ear water, nettle or Spanifli radifti-water, the water oozing from broken glafl"e8, fuet, fait, oil, foot, diftilled wine, fal ammoniac, urine, Sec. But thefe methods are now generally abandoned. Mr. Stodart, a very ingenious and fcientific cutler in Lon- don, fays, (as Mr. Nicholfon informs us, Journal, vol. iv. 4to.) that one of his workmen makes up his charcoal fire with ftiavings of leather, finding that this is effeftual in pre- 10 T E M venting the tools from cracking in the procefs of hardening ; and he fays, that he has found no advantage from the ufe of fait in the water. To harden and temper Englidi, Flemifh, and Swedifli fteel, you muft give them a pretty high heat ; then fuddenly quench them in water to make them hard ; but Spanifli and Venetian fteel will need only a blood-red heat before they be quenched. In confequence of this operation, all the qualities of fteel are changed ; fo that from being very duttile and foft, it becomes fo hard and ftifF, that it is no longer capable of being cut by the file, but is itfelf capable of cutting or piercing very hard bodies, and that it does not yield to the hammer, but may be fooner broken in pieces than extended. It be- comes alfo fonorous, brittle, very elaftic, and capable of ac- quiring the moft beautiful polifh. This hardnefs and duc- tility of fteel may be divcrfified by vai-ying the temper. The hotter the fteel is when tempered, and the colder the water into which it is plunged, the greater hardnefs it ac- quires, but at the fame time it becomes fo much more brittle. The coldnefs of the water may be increafed by diflblving falts in it : obfcrving that water is always colder while the falts continue diflblving ; and that the fteel will cool fooner by being ftirred about or placed in a ftream, fo as to come in contaft with water not already made warm. On the contrary, the lefs hot the fteel is when tempered, and the hotter the water is in which it is tempered, the lefs hard it becomes, and alfo the greater duftility it retains : and the proper degree of heat is always relative to the ufe for which the tools made of the fteel are intended. If the fteel be too hard or brittle for an edged tool, &c. let it down by rubbing a piece of grindftone or vvhetftone hard upon the work, to take off the black fcurf : then brighten, or heat it in the fire : and as it grows hotter, you will fee the colour change by degrees, in the manner and by the gradations ftated under the article Cutlery. Saw -makers temper their tools by rubbing them over with fuet or other greafe, and then heating them gradually till the temperature of each tool is fufficiently raifed to fet fire to the greafe of itfelf and occafion it to blaze. The}' are thought to acquire in this mode of treatment a temper equal to that which would be obtained by heating them in the ufual way, till they became of a deep blue. This opera- tion, which is praftifed at Sheffield, is called " blazing." For the method of tempering files, in which the great de- fideratum is to blend tenacity with hai-dnefs, fee File. In the year 1789, Mr. David Hartley took out a patent for a method of tempering fteel by the aid of a pyrometer or thermometer applied near to the furface of the article, and at the fame time recommended the ufe of heated oil, in which (he fays) many dozens of razors or other tools might be tempered at once with the utmoft facility, and the vari- ous degrees of heat necefiary for different purpofes might fpeedily be determined by experiment. (See Nicholfon's Journal, vol. i. 410.) An improvement of this principle has been fince fuggefted by Mr. Parkes ( Chem. Efl". vol. iv. ) by providing a bath of oil or of fome kind of fufible metal for the tempering of every fpecies of edged tool, which contrivance would, in his opinion, give to this operation a greater degree of certainty, than has ever been experienced by thofe who have condufted fuch manufaftories. See Tilting. Steel is ufually fold tempered, becaufe in many manu- faftures, the cuftom is to temper it as foon as it is made, probably that the purchafers of it may be better able to judge of its quahty. When this ileel is to be ufed, it muft be untempered by heating it more or lefs, and letting it cool T E M T E M cool (lowly, that it may be extended, filed, aiid receive the neceffary form : after which every workman tempers it again in his own way. M. Berthoud, in his treatife on marine clocks, recom- mends hardening the (lecl-balance wheel, by daubing it over with foot (of wood) moittened witli urine, putting it into a fmall box of thin iron-plate, and covering it over with the fame compofition. This box with its contents is to be heated to a blood-red, and then tlie wheel taken out fud- denly and quenched. Mr. Harrifon and M. Berthoud feem to agree upon the whole, that the balance-fpring of time-pieces ftiould be liardened and tempered after it has been coiled up in its proper form ; and not tempered firft and coiled up after- wards, as is the pra£lice in making the main-fpring. Some curious workmen, in order to equally temper fmall fteel in- ftruments, employ melted lead as an intermedium. A plate of iron floats upon the melted lead, and receives from it, in all its parts, an equal heat : the pieces of fteel laid upon this plate, acquire all at once the fame degree of heat, and are at once quenched in water ; tlic blue or other colours, which they fucceflively aflume, affording fure marks of the proper points of heat at which thev are to be quenched, according to the different degrees of hardnefs required in them. Lewis's Com. Phil. Techn. p. 32. For the method of tempering fteel bars for artificial mag- nets, praftifed by Mr. Canton, fee Artificial Magnet. The ancients appear to fome to liave had a better method of tempering than any of the moderns are acquainted with ; witnefs their works in porphyry ; a ftone fo hard, that fcarcely any of our tools make any impreffion upon it. Tempering of Land, in Agricultitre, a term fignifying the preparing it for a crop, efpecially of wheat. It is a term in much ufe in Norfolk. It imphes aU the various operations that may be undertaken in this intention. TEMPEST, Tempestas, a ftorm or violent commo- tion of the air, with or without rain, hail, fnow, &c. Tempest, in Mythology, a deity among the Romans, concerning whom we merely know, that Marcellus, as an acknowledgment for having efcaped a ftorm, with which he was overtaken at fea, between the iflands of Corfica and Sardinia, built a temple to her without the Porta Capena. TEMPESTA, Antonio, in Biography, was an ingeni- ous defigner and painter, born at Florence in 1555, and was initiated in the art by Santi di Titi ; afterwards he ftudied imder another artift, whofe name was Stradanus. Tempefta was gifted with a brilliant and powerful imagina- tion, not, however, of the moft correft or exalted kind. His favourite fubjefts were battles, fieges, cavalcades, hunt- ings, proceffions, &c. ; all of which he arranged and de- figned in a novel and rich ftyle, and executed with un- common fpirit and energy. He was employed by Gre- goi-y XIII. in the Vatican, which he adorned with gro- tefque inventions, and fome few hiftorical produftions. He was alfo employed by the marchefe Juftiniani in decorating his palace ; and in feveral of the churches of Rome, Tem- pefta's paintings may be found. He not only exercifed his genius and time with the pen- cil, but devoted much of both to the etching needle ; having left behind him nearly 1800 plates of different kinds, and of very confiderable merit. He died in 1630, aged 75. TEMPIE, in Geography, a town of the ifiand of Sar- dinia ; 25 miles E. of Caftello Arragonefe Alfo, a town of Mexico, in the province of Guadalajara ; 500 miles N.W. of Mexico. TEMPLARS, Templers, or Knights of the Temple, a religious military order, firft cftabliflied at Jenifalem, in favour of pilgrims travelling to the Holy Land. The original of this order, tiie firft military one in the world, is this : in 1 1 1 8, fome pious and noble pcrfons de- voted themfclves to the fervice of God, in the prefence of the patriarch of Jerufalem ; promifing to live in perpe- tual chaftity, obedience, and poverty, after the manner of canons. The two principal perfons were Hugo de Paganis, and Gcoffry of St. Omers. Baldwin II. then king of Jeru- falem, gave them an apartment in his palace, near the temple at .lerufalem, not far from the fepulchre of our Saviour ; whence their denomination Templars. Soon afterwards, the canons of the temple gave them a piece of ground near the faid temple, on which to build regular houfes ; and the king, the lords, the patriarch, and the prelates, each gas'e them fomewhat out of their revenue for food and cloaths. Their firft undertaking, and what they had firft in view at their inftitution, was, to guard the, highway againft rob- bers, &c. chiefly for the fafety of pilgrims and croifes. The principal articles of their rule were : that they (liould hear the holy office throughout every day ; or that, when their military duties (hould prevent this, they (hould fupply it by a certain number of pater nofters : that they (liould abftain from flefh four days in the week, and on Fridays from eggs and milk-meats : that each knight might have three horfes, and one efquire : and that they (hould neither hunt nor fowl. In the year 1228, this order acquired ftability, by being confirmed in the council of Troyes, and fubjefted to a rule of difcipline drawn up by St. Bernard. In every nation they had a particular governor, called majler of the temple, or of the militia of the temple. Their grand-mafter had his refidence at Paris. The order of Templars flourifhed for fome time, and ac- quired by the valour of its knights immenfe riches, and an eminent degree of mihtary renown : but as their profperity increafcd, their vices were multiplied, and their arrogance, luxury, and cruelty, rofe at laft to fuch a monftrous height, that their privileges were revoked, and their order fupprefled with the moft terrible circumftances of infamy and fcverity. Their accufers were two of their ovi-n body, and their cliief profecutor Philip the Fair, of France, who addrcffcd hie complaints to Clement V. The pope, though at firft un- willing to proceed againft them, was under the necefTity of complying with the king's defire, fo that, in the year 1307, upon an appointed day, and for fome time afterwards, all the knights, who were difperfed throughout Europe, were feized and imprifoned. Such of them as refufed to confefs the enormities of which they were accufed, were put to death ; and tliofe who, by tortures and promifes, were in- duced to acknowledge the truth of what was laid to their charge, obtained their liberty. In 131 2, the whole order was fupprefled by the council of Vienne. A part of the rich revenues they poffefTed was beftowed upon other orders, efpecially on the knights of St. John, now of Malta, and the reft confifcatcd to the refpeftive treafuries of the fove- rcign princes in whofe dominions their pofTeffions lay — The knights Templars, in order to juftify the feverity with which they were treated, were charged with apoftacy to the Sara> cens, and holding correfpondence with them ; with iufulting the majefty of God ; turning into derifion the Gofpel of Chi'ift ; and trampling upon the obligation of all laws, human and divine. Candidates, it is faid, upon admiflion to this order, were commanded to fpit, in token of contempt, upon an image of Chrifl, and after admiflion, to worlhip cither a S f 2 cat. T E M cat, or a wooden head crowiiod witli gold. It is fartlier uffirim-d, that, among them, the odious and unnatural a£t of lodomy was a matter of obligation ; and they arc charged with other crimes too horrible to be mentioned, or even imagined. However, though there be reafon to believe that in this order, as well as otiu-rs of the fame period, there were Ihocking examples of impiety and profligacy ; yet that the whole order was thus cnormoully corrupt, is fo far from being proved, tliat the contrary may be concluded even from the ads and records, yet extant, of the tribunals be- fore which they were tried and examined. If to this we add, that many of tlie accufations advanced againft them flatly contradicft each other, and that many members of this unfortunate order folemnly avowed their innocence, while lar.gnilhing under tlie feverell tortures, and even with their d)ir.g breath ; it would feem probable, that king Philip fet oil foot this bloody tragedy, with a view to gratify his avarice, and glut his refentment againft the Templars, and efpecially againft their grand-mafter, who had highly of- fended him. The principal caufe of this invincible hatred againft them was, that in his quarrel with Boniface VIII. t!ic knights efpoufed the caufe of the pope, and furniflied him with money to carry on the war. Mofiieim's Eccl. Hift. vol. iii. ed. 8vo. Bower's Hift. of the Popes, vol. vi. P- 393- TEMPLE, Templum, a public building erefted in honour of fome deity, cither true or falfe ; and in which the people meet to pay religious worthip to the fame. The word is formed from the Latin lemplum, which fome derive from the Greek rifj-in-:, fignifying the fame thing ; and others from Ti/^ra, abfc'mdo, I cut off, I feparate, becaufe a temple is a place feparated from common ules ; others, with more probabihty, derive it from the old Latin word templare, to contemplate. It is certain the ancient augurs gave the name templa to thofe parts of the lieavens which were marked out for the obfervation of the flight of birds. Their formula was this : Templa tefqua Junto. Temples were originally all open, and hence received their name. See Phil. Tranf. N° 47 1 . feft. 5. where we have an account of the ancient temple in Ireland of the fame fort as our famous Stonehenge. The word templum, in its primary fenfe among the old Romans, fignified nothing more than a place fet apart, and confecrated by the augurs, whether enclofed or open ; in the city, or in the fields. Clemens Alexandrinus and Enfebius refer the origin of temples to the fepulchres built for the dead. This notion has been lately illuftrated and confirmed by a variety of tefti- monies by Mr. Farmer, in his Tre.itife on the Worfliip of Human Spirits, p. 373, Sec. Herodotus, Lucian, and Strabo, will have the Egyptians to have been the firtt who built temples to the gods ; and from them the cuftom was propagated to the AtTyrians, comprehending under this ap- pellation Phoenicia, Syria, and other countries. From Egypt and Phoenicia it f)a(red to Greece with the colonies, and from Greece to Rome. The firft erefted in Greece is afcribed to Deucalion by ApoUonius (Argonaut, lib. iii.) and the firft in Italy to .Tnnus. In antiquity we meet with many people who would not build any temples to their gods, for fear of confining them to too naiTOw bounds, lliey performed their facrifices in all places indifferently, from a perfuafion, that the whole world is the temple of God, and that he required no other. This was the doftrine of the magi, followed by the Per- fians,_ the Scythians, the Numidians, and many other nations mentioned by Herodotus, lib. i. Strabo, lib. xv. and Cicero, in his fccond oration againft Verres. T E M The Perijans, who worfhipped the fun, believed it would wrong his power, to enclofe him in the walls of a temple, who had the whole world for his habitation ; and lieucc, when Xerxes ravaged Greece, the magi exhorted him to deftroy all the temples he met with. The Sicyonians would build no temples to their goddefs Coronis ; nor the Athenians, for the hke reafon, ereft any ftatue to Clemency, who, they faid, was to live in the hearts of men, not within ftone walls. The Bithynians had no temples but the mountains to worfliip on ; nor had the ancient Germans any other but the woods. Even fome philofophers have blamed the ufe and building of temples, particularly Diogenes, Zeno, and his followers the Stoics, But it may be faid, that if God hath no need of temples, men have nt ed of places to meet in for the pubhc offices of religion : accordingly, temples may be traced back even unto the remoteft antiquity. See Hofpinian, de Ori- gine Templorum. The Romans had feveral kinds of temples ; of which thofe built by the kings, &c. confecrated by the augurs, and in which the exercife of religion was regulai-ly performed, were called, by way of eminence, templa, temples. Thole that were not confecrated were called udes. The little temples, that were covered or roofed, they called ttdiculee ; thofe open, facella. Some other edifices, confecrated to particular myfteries of religion, they called fana and delulra. All thefe kinds of temples, Vitruvius tells us, had other particular denominations, according to the form and manner of their conftruftion ; as will be hereafter fpecified. In- deed, the Romans out-did all nations with regard to temples : they not only built temples to their gods, to their virtues, to their difeafes, S:c. but alfo to their emperors, and that in their life -time ; inftances of which we meet with in medals, infcriptions, and other monuments. Horace compliments Auguftus hereupon, and fets him above Hercules, and all the heroes of fable ; in that thofe were only admitted into temples after their death, whereas Auguftus had his temples and altars while living. " Prsefenti tibi matures largimur honores ; Jurandafque tuum per nomen ponimus aras." Epift. ad Aug. Suetonius, on this occafion, gives an inftance of the mo- defty of that emperor, who would allow of no temples being erefted to liim in the city ; and even in the provinces, wliere he knew it was ufual to raife temples to the very proconfids, refufed any but thofe erefted in the name of Rome as well as his own. Vide Suet, in Oftav. cap. 52. Whenever a temple was to be erefted, the arufpices were confulted as to the fcite of it, and the time when the con- ftruftion of it was to commence. The fpot afligned to it was carefully purified, and it was encircled with fillets and garlands. The veftals, accompanied with young boys and girls, waftied the ground with water, and the prieft expiated it by a folemn facrifice. Then he touched the foundation- ftone, and bound it with a fillet ; and the people, animated with extraordinary zeal, threw it in thither with fome pieces of money, or metal which had not pafled through the fur- nace. When the edifice was finiflied, it was confecrated with a variety of ceremonies, in which the prieft, or, in his ab fence, fome of his college, prefided. Some of thefe temples were not to be built within the precinfts of cities, but with- out the walls, as thofe of Mars, Vulcan, and Venus, for reafons particularly affigned by Vitruvius. The temples were held in great veneration ; and, in fome cafes, they were a fanftuary for criminals and debtors. Within they were very TEMPLE. very mucU adorned ; particularly with coflly llatues of their gods and great men, and a great variety of votive offerings. The mod celebrated of tiie ancient temples among the Pagans were the following : viz. the temple of liclus (fee Belus and Bahylon ) ; tlie temple of Vulcan at Memphiti, the magnificence and extent of which ai-e highly extolled by Herodotus ; the temple of Jupiter at Thebes or Diofpohs ; that of Andera at Hermunthis ; that of Proteus at Mem- phis ; that of Minerva at Sais ; the temple of Diana at Ephefus (fee Diana); the temple of Apollo in tlie city of Miletus, which, as well as that of Diana, was of the Ionic order ; the temple of Eleufis, built in honour of Ceres and Proferpine, capable of containing 30,000 perfons ; the temple of Jupiter Olympins at Athens, of the Corinthian order ; and the temple of Apollo at Delphi, fo famous for its oracles, and for the rich prefents with which it vvat; enriched (fee DELrm); the temple of Jupiter, which contained his admirable llatue. The ai'chiteft of the temple was Libo, a native of the country : its height from the area to the roof was 68 feet, its breadth 95, and its length 230. The throne and ftatue of the god, for we cannot enumerate other a crown. There alfo appeared Apollo and Diana, Minrrva and Hercules. At the bottom of the pedeHal, you might have feen Aniphltritc and Neptune, and Diana or the moon, who appeared mounted on horfeback. In fine, a woollen veil, ot a purple dye, .ind magnificently embroidered, the prefent of king Antiochus, hung from top to bottom. The tlirone and Itatue reached from the pavement, which was of the finell marble, to the roof. Italy abounded with temples as much as Greece ; fcveral of v.hich were remarkable for their fmgularity or magnificence. Rome was full of temples : fome of the moll remarkable for their origin, materials, llrutture, or ufe, were the following : ■viz. the temple of Apollo, built by Aiiguilus, in honour of his favourite deity Apollo, after his vidtory at Aftium, upon mount Palatine. Its llrudtnre was very magnificent ; it was built of the finefl marble of Claros, and embelli(hed| both within and without, with the richeft ornaments. Its gates were of ivory, enriched with baffo-relievos, reprefent- ing the Gauls, when they were thrown headlong from the top of the Capitol by T. Manlius. In the frontifpiece was a chariot of the fun, of malTy gold, crowned with rays fo ■fplcadent that they dazzled the eyes of beholders. Within fplendid ornaments, were the mafter-piece of Phidias ; and the temple was a marble ftatue of Apollo, made by Scopas, antiquity produced nothing fo magnificent nor fo finifhed. and alfo a eololfal one of brafs, 50 feet high ; together with The llatue, of an immenfe lieight, was of gold and ivory, fo a candleftick in the form of a tree, whofe branches were artificially blended, that it could not be beheld but with covered with chillers of lamps refembling fruit. Upon aftonidiment. The god wore upon his head a crown, which thefe branches the poets ufed to hang their poems, which refembled the olive-leaf to perfection : in his right hand he they offered up to Apollo, as Horace informs us, ep.' 3. 1. i. held a viftory, likewife of gold and ivory ; and in his left a To this temple, dedicated to the " god of arts'" was very fceptre of exquifite tafte, refulgent with all forts of metals, properly annexed a noble hbrary The temple of Bacchus, and fupporting an eagle. The Ihoes and mantle of the god fituated wit.tout the walls of Rome, is now the church of were of gold ; and upon the mantle were all forts of animals St. Conllantia, fupported on the infide by twenty-four noble and flowers engraved. The throne was all fparkling with pillars of granite. Its ancient mofaic ceiling, and the old gold and precious (lones. The ivory and ebony, the animals window by which light was let in from the roof, ftill remain, there reprefented, and feveral other ornaments, by their af- Behind tlje prefent ahar Hands an antique urn of por- femblage, formed a delightful variety. At the four corners phyry, of large dimenfions ; and on each fide of the altar, a of the throne were as many Vitlories, that feemed to be finely wrought antique candleftick of marble Here was joining hands for a dance, befides two others that were at the temple of the goddefs Bona, who was Dryas, the wife Jupiter's feet. The feet of the throne, on the fore-fide, of Faunus, diftinguifhed by her exemplary chattity. The were adorned with fphinxes, who were plucking the tender Roman ladies facrificed to her in the night in a little infants from the bofom of the Theban mothers ; and under- chapel, into which the men were not allowed to enter nor neath were to be feen Apollo and Diana, wounding Niobe's were they permitted to be prefent at her £acrifices. It was children to death with their arrows. Four crofs bars that for the violation of this rule, that Cicero profecuted the de were at the feet of the throne, and went from one end to the bauched Clodius. (See his article.) The temple of Diana other, were adorned with a great rumber of figures ex- was feated on mount Aventine. It was built in the reign of tremely beautiful : upon one were reprefented feven con- Servius TuUius, at the joint expence of the Romans and querors at the Olympic games ; upon another appeared Latins, for the purpofe of their meeting annually to offer a Hercules, ready to engage with the Amazons, and the num- facrifice, in commemoration of the league made between the ber of combatants on either fide was twenty-nine. Befides two nations. — The firft temple of Faith is faid to have been the feet of the throne, there were hkewife pillars to fupport erefted by Numa, who taught the Romans to worfhip this it. In fine, a great balluftrade, painted and adorned with goddefs, and thus to be reminded, that the moft facred oath figures, railed in the whole work. Pansenus, an able painter they could take was to fwear by their fuil/j or veraci/y. of that time, had reprefented there, with inimitable art, His intention was to render their promifcs, without writings Atlas bearing the heavens upon his ftioulders, and Hercides ■ - —■'■--""-• -- ■" ' • • -■ in an attitude ftooping to eafe him of the load : Thefeus and Pirithous, the combat of Hercules with the lion of Nemea, Ajax offering violence to Caffandra, Hippodamia with her mother, Prometheus in chains, and a thoufand other fubjefts of fabulous hiftory. In the moft elevated place of the throne, above the head of the god, were the Graces and Hours, of each three in number. The pedeftal which fup- ported this pile, was equally adorned with the reft. There Phidias had engraved upon gold, on the one fide, the Sun guiding his chariot ; on the other, Jupiter and Juno, the Graces, Mercury, and Veila. There Venus appeared rifing out of the bofom of the fea, and Cupid receiving her ; while had no pofticum, or back-door, as other temples had ; thus Pitho, or the goddefs of perfuafion, was prefenting her with intimating, that we muft not only pafs through virtue to attain to or witneffes, as firm and certain as contracts made and fworii to with the greateft formalities ; and in this he fucceeded to his wifli. Polybius bears this honourable teftimony to the Romans, that they inviolably kept their faiti, that is, their word, without having occafion for witneffes or fecurities ; whereas nothing could bind the Greeks to their promifes The temple of Honour was built by Mutius, by order of Marius, and might be reckoned among the nobleft buildings in ancient Rome, if the materials, which were ftonc, had correfponded to the greatnefs of the dcfign. It was re- markable for this circumftance, that the entrance of it was dedicated to Virtue, and the reft to Honour ; and that it TEMPLE. to Iioiiour, but that honour is alfo obliged to rcpafs t(irou|h rtrtuc, that is, to perfcvere in it, aiid acquire more of it. — The temple of Janus.' The Romans built, at different times, three temples to .lar.us ; for an account of which, fee Janus — The temple of .lupiter the Prefervef was one of the fixty temples that flood upon the Capitoline hill. .lupiter Cuftos was re- prcfcnted in it, holding his thunder with one hand, and a dart with the other, and the figure of the emperor was under his thunder, to (hew that he was under Jupiter's proteftion ; or elfe engraved, lying upon a globe, and holding an image of viftory, with the eagle at his feet, and thefe words, «' Jovi Confervatori Augullorum noftrorum." — The temple of Jupiter Optrmus Maximus, or Jupiter Capitolinus, was moft commonly called the Capitol; which fee. — The temple of Liberty was built upon mount Aventine, on the fpot where Cicero's houfe once ftood, enriched with feveral brafs pillars, and many fine ftatues. — Th'^ temple of Mars ftood on the declivity of the Capitoline bill. In this temple were kept the eagles and other military enfigns of the Romans, and alfo the chariot in which Cxfar had triumphed — The temple of Peace was begun by the emperor Claudius, and finifhed by Vefpafian, who embelli(hcd it with paintings and ftatues of the greateft matters, and alfo depofited in it all the fpoils and riches taken by his fon Titus in the temple of Jerusalem. It was burnt in the reign of Commodus — The temple of Jupiter the Avenger was the Pantheon ; which fee. To the temples already enumerated, we might add thofe of Antoninus and Fauftina, of Auguftus, of Auguftus and Bacchus, of the Mufes, of Ceres, of Claudius Caefar, of Concord, of Fame, of the Flavian family, of Faunus, of Fever, of Trajan and Neptune, of Happinefs, of Faith and Jupiter the Preferver, of Flora, of Bad Fortune, of the eldeft or firft-born Fortune, of Public Fortune, of Virile or Courageous Fortune, of Hercules, of Juno, of Juno Mo- heta, of Juno Sofpita, the giver or preferver of health, of queen Juno, of Jupiter Feretrius, of Jupiter Stator, of iipiter Tonans or the Thunderer, of Jupiter the Conqueror, of Liber, an epithet of Bacchus, of the Mother of the gods, of Mercury, of Minerva, of the goddafs Nenia, of Ops and Saturn, of the Penates or Houfehold gods, of Reft, of Quirinus, of Romulus and Remus, of Saturn, of Serapis, of the Sun, of the Sun and Moon, of the god Sylvanus, of Tellus or the Earth, of Venus, of Venus and Cupid, of Venus Erj'cina, of Venus Erycina and the Mind, of Venus Verticordis, of Vertumnus, of Vefta, and many others, which, great and fmall, amounted to upwards of one thoufand. Temple, Jewijli, at Jerufalem, was an edifice erefted much after the model of the tabernacle, but in a much more magnificent and expenfive manner. According to the opinion of fome, there were three different temples : the firft built by David and Solomon on mount Moriah, which was part of mount Sion ; the fecond, by Zerubbabel and .Toftiua the high prieft ; and the third by Herod. This laft, however, the Jews will not allow to be a new temple, but only the fecond repaired or rebuilt. The expence of building Solomon's temple was prodigious: the gold and filver employed for this purpofe amounted to upwards of eight hundred miUions fterling (i Chron. xxii. 14. xxix. 4. 6, 7.), which, fays Dr. Prideaux, was fufficient to have built the whole temple with folid filver. But as the book of Chronicles was written after the return from the Baby- lonifh captivity, it is probable that the Jews might compute by the Babylonifh talent, which was little more than half the Mofaic talent, or perhaps by the Syriac talent, which was but one-fifth of the Babylonifh ; and thus the whole quantity of gold and filver would be reduced to a com- paratively moderate quantity, and yet fufficient for the purpofe. Jofephus (lib. vii. xiv. ii. ) acquaints us, that the two firft fums were only one-tenth part of what is expreffed in the prefent Hebrew ; and Dr. Kennicott ( State of the Hebrew Text, vol. ii. p. 355.) thinks it probable, that a cipher was added to them both in fome very ancient He- brew copy. This temple was furrounded, except at the front or eaft end, with three ftories of chambers, each five cubits fquare, which reached to half the height of the temple ; and the front was graced with a magnificent portico, which rofe to the height of a hundred and twenty cubits. It was plun- dered by Nebuchadnezzar king of Babylon, and at length deftroyed, after it had ftood, according to Jofephus, four hundred and feventy years, fix months, and ten days, from its dedication. Others, however, as Calvifius and Scaliger, reduce the number of years to four hundred and tvventy- feven, or four hundred and twenty-eight ; and Ufher, to four hundred and twenty-four years, three months, and eight days. The fecond temple was built by the Jews, after their re- turn from the Babylonifh captivity, under the direction and influence of Zerubbabel their governor, and of Jofhua the high prieft, with the leave and encouragement of Cyrus the Perfian emperor, to whom Judaea was now become a tri- butaiy kingdom. According to the Jews, this temple was deftitute of five remarkable appendages, which were the chief glory of the firft temple ; w'z. the ark and mercy-feat, the Schechinah, the holy fire on the altar, which had been firft kindled from heaven, the urim and thummim, and the fpirit of prophecy. This temple was plundered and profaned by Antiochus Epiphanes, who alfo caufed the public worfhip in it to ceafe ; and afterwards purified by Judas Maccabaeus, who reftored the divine worfliip : and after having ftood five hundred years, rebuilt by Herod, with a magnificence ap- proaching to that of Solomon's. Tacitus calls it immenftc opulentix templum ; and Jofephus fays, it was the moft afto- niftiing ftrufture he had ever feen, as well on account of its architedlure as its magnitude, and likewife the richnefs and magnificence of its various parts, and the reputation of its facred appurtenances. This temple, which Herod began to build about fixteen years before the birth of Chrift, and fo far completed in nine years and a half, as to be fit for divine fervice, was at length deftroyed by the Romans on the fame month and day of the month, on which Solomon's temple was deftroyed by the Babylonians. The Jewifti temple itfelf confifted of the portico, the fanc- tuary, and the holy of holies ; and it was ornamented with fpacious courts, making a fquare of half a mile in circum- ference. The firft court was called the court of the Gen- tiles, becaufe they were allowed to come into it, but no farther. Within this was a lefs court, into which none but Ifraelites might enter, divided into the court of the women ; and the inner court, in which the temple and altar ftood, and into which the priefts and all male Ifraelites might enter. Temple, in ArchiteSure. The ancient temples were dif- tinguifhed, with regard to their conftruiSlion, into various kinds : as. Temple \n antic, /Edes in antis. Thefe, according to Vitruvius, were the moft fimple of all temples, having only angular pilafters, called antd, or parajlatie, at the corners, and two Tufcan columns, on each fide of the doors. Temple, Tetrajlyle, or fimply tetrafiyle, was a temple that had four columns in front, and as many behind. Such was the temple of Fortuna Virihs at Rome. Templ£, Projlyle, that which had only columns in its front, TEMPLE. front, or forc-fidc. As that of Ceres at Elcufis, in Greece. Temple, Amphybrojlyle, or double projlyle, that which had columns both before and behind, and which was alfo tetraftyle. Temple, Periptere, that which liad four rows of infulated columns around, and was exhaftyle, /'. e. had fix columns in front; as the temple of Honour at Rome. See Pekii'TERE. Temi'LE, Diptere, that which had two wings, and two rows of columns around, and was alfo oftollyle, or had eight columns in front ; as that of Diana at Ephefus. Temple, Pfcudo-dlpterc. See 'PsEVDO-dlpicrc. Temple, Hypathros. See Hyp/T.thros. Temple, Monoptere. Sec Monoptere. Temples, among us, denote two inns of court, thus called, bccaufe anciently the dvvelling-houfe of the knights Templars. At the fuppreffion of that order they were purchafed by fome profeflbrs of the common law, and converted into hof- pitia, or inns of courts. They are called the Inner and MlJdk Temple, in relation to EfTex-houfe, which was alfo a part of the houfe of the Templars, and called the Outer Temple, becaufe fituate with- out Temple-Bar. In the Middle Temple, during the time of the Templars, the king's treafure was kept : as was alfo that of the kings of France in the houfe^of the Templars at Paris. The chief officer was the mafter of the Temple, who was fummoned to parliament in 49 Hen. III. And from him the chief minifter of the Temple church is ftill called M after of the Temple. Temple, Sir William, in Biography, a (latefman and mifcellaneous writer, was the fon of fir John Temple, mafter of the rolls in Ireland in the reign of Charles I. and II., and author of a Hiftory of the Irifh Rebellion, and born in London in the year 1628. Having finiHied liis courfe of claffical education, he was entered, at the age of feventeen, at Emanuel college, in the univerfity of Cam- bridge, under the tuition of the learned Cudworth. Being defigned for pubhc hfe, his principal attention at the univer- fity was engaged by the fludy of the modern languages, French and Spanifh ; and at the age of twenty, he was lent to finifh his education by travelling on the continent. After fpending fix years in this way, he returned home in 1654, and married the daughter of fir Peter Ofborn, of Chickfand, Bedfordfllire, with whom he became acquainted during his foreign travels. Declining to accept any office under Cromwell, he refidcd with his father in Ireland, and devoted his time to the ftudy of hiftory and philofophy. At the Reftoration he became a member of the Irifh Con- vention ; and in the Iri(h parhament of the year 166 1, he was returned as a reprefentative of the county of Carlow, and in 1662 was nominated one of the commiffioners from that parliament to the king. At this time he removed with his family to England ; and having faithfully executed a fecret commiffion to the bifhop of Munfter, with which he was entrufted in 1665, he was appointed in the following year refident at the court of Brulfels, and raifed by patent to the rank of a baronet. During the reign of Charles II. he was concerned in a variety of negociations. After the peace of Breda, (July 10, 1667,) fir William went over to Holland, and formed an intimate acquaintance and friendfhip with De Wit, a man frank and open, and of the fame ge- nerous and enlarged fentiments with himfelf ; and in confe- quence of the negociations of thefe two able ftatefmen', a defenfive alliance was concluded between Holland and Eng- land. Sweden acceded to the confederacy : and thus was formed the triple league, which was generally regarded wilii equal furprife and approbation. In the conduft of this bufi. ncfs. Temple acquired great lionour ; but to all the compli. ments that were paid to him on the occafion, he modeftly replied, tliut to remove things from their centre, or proper clement, required force and labour ; but that of themfelves they cafily returned to it. The French monarch and the court of Spain were equally difpleafed ; but in the treaty at Aix-la-Cha])elle, where Temple appeared as amballador extraordinary and mediator, on behalf of England, his ad- drefs prev.^iled ; the Spanifli minifter comphed with the con- ditions propofed ; and the peace between the contending powers was figned in May, 1668. In confequence of this event, fir William was nominated ambaftador to the States- General, and taking up his refidence at the Hague in the month of Auguft of this yeai-, he maintained his intimacy with De Wit, and was alfo on familiar terms with Wilham, prince of Orange, who had then attained the age of eighteen years. But this triple alliance was of fhort duration. The corruption and intrigues of the Englifli court produced a recall of Temple in the year 1669, and when it was propofed to him to return and make way for a breacii with Hol- land, he declined, much to his honour, engaging iu hoftility againft a country to which he was attaclied, and retired from public bnfinefs to hht feat at Sheen, near Richmond. Here he employed himfelf in the improvement of his manfion, and in the cultivation of his garden ; and alfo in writing hi« " Obfervations on the United Provinces," and a part of his " Mifcellanea." When the war with the Dutch became unpopular through the nation, and the court and its minifters were under a neceffity of bringing it to a tei-mination, fir William Temple was c;Jled out of his retirement to nego- ciate with the Spanifli minifter in London : and when tlie feparate peace with Holland was concluded, he was re- quefted in the next yeai-, 1674, to undertake the office of ambaffador to the States-General, for the purpofe of nego- ciating a general peace. Before his acceptance of this office, he obt;uned an audience of the king, with a view of ftating to hie majefty the pernicious politics of the Cabal miniftry, and tlie necelfity ot popular meafures for regaining the con- fidence of the nation. The negotiations for peace were com- menced at Nimeguen, whither he removed from the Hague in 1676: and during their flow progrefs, he availed himfelf of the opportunity thus afforded him for accom])lifliing the popular meafure of the marriage of the prince of Orange to the duke of York's eldeft daughter, which took place in 1677. On another occafion, when the French manifcfted their intention of retaining the Spanifh towns, which were to be furrendered by treaty, Temple was difpatched to the Hague to concert effectual meafures with the States for bringing the French to terms ; and in fix days lie concluded a treaty, July 1678, by which England was bound to de- clare war againft the French if the towns were not evacu- ated within the interval of fixteen days ; but fo feeble and fluftuating were the Enghfh councils, that before the ratifi- cation of the projefted treaty, peace was figned at Nimeguen, and France was fecured in the poffeffion of a great part of its conquefts. In 1679 Temple was recalled from the Hague, in order to be appointed one of the fecretaries of ilate ; but per- ceiving the violence of parties, and the prevalence of difcon- tent, he recommended a council of thirty perfons, which was to be compofcd, together with the minifters of the crown, of perfons pofTeffing influence and credit in both houfee of parliament. But divifions occurred which prevented the falutary cffefts of fuch a meafure. Projeds of limitation or exclufion were the fubjeils of warm JifcuiBon in parliament. io T E M To thele meafures Temple was adverfe ; and his laft acl in parliament, as member for the univerfity of Cambridge, was to carry from the council the king's final anfwer to the ad- drefs of the Commons, never to confent to the exchifion of his brother : other members had previoully declined this difagreeable fervice. When the king, in January 1 68 1, diflolved the parliament without the advice of his privy council. Temple boldly remonftrated againft the mcalure ; and at length, wearied with the faftion and mifgovernmoiit which he had witncfled, he declined the offered return for the univerfity to the new parliament, and retired to Sheen, conveying from thence a meffage to thi? king, " that he would pafs the reft of his life as good a fubjeft as any in his kingdom, but would never more meddle with public affairs." The king replied to the meffage, that he bore him no re- fentmcnt ; but his name was expunged from the council. The remainder of his life was fpent in retirement and feclu- fion from all public bufinefs ; and it is faid, that he inter- fered fo little in political matters, as not to know the defign of the prince of Orange to engage in the expedition that terminated in the revolution, and to be the laft perfon who gave credit to his landing. After James's abdication, how- ever, he waited on the prince at Windfor, and prefentcd to him Iiis fon. King William urged upon him the accept- ance of the office of fecretary of ftate ; but he maintained his purpofe of Hving in retirement. His fon was appointed fecretary at war ; but in the week in which he affumed the office, he was feized with melancholy, and threw himfelf into the Thames. His refleftion on this affliclive event was that which his Stoic philofophy alone could have diftated : " a wife man might difpofe of himfelf, and render his life as fhort as he pleafed." In his ftate of retirement, he admitted Swift to be his companion, as we have already mentioned under Swift's article. King William occafionally vifited him, and confidentially confulted him on feveral important affairs. In 1 694 he loft his wife ; and finking gradually under increafing infirmities, occafioned by repeated fits of the gout, his hfe was terminated at Moor park, in January 1698, in his 70th year. The greateft part of his fortune was bequeathed to the daughters of his unfortunate fon by a French lady, under the exprefs condition that they (hould not marry Frenchmen. Sir William Temple ranks high as aftatefmau, and alfo as a patriot, who well underftood and zealoufly purfued his country's intereft. His foibles, without giving them a worfe appellation, were impatience with thofe whom he diftiked, warmth in difpute, and a ftiare of vanity and con- ceit ; but he was fubftantially, fays his biographer, a worthy man in the various relations of life. To outward forms of religion he paid little regard ; but his letter to the counlefs of Effex is no lefs pious than eloquent: fo that we can fcarcely admit the charge of atheifm with which he is re- proached by bilhop Burnet. As a writer, he ranks ainong the moft eminent and popular of his time. His " Obferv- ations upon the United Provinces of the Netherlands" were printed in 1672, and deferve the attention of the politician and philofopher: his " Mifcellanea" are lively and enter- taining, if not profound. His " Memoirs" elucidate the hiftory of the times. His " Introdudion to the Hiftory of England" was pubUflied in 1695. His "Letters," in 3 vols., which relate to public tranfaftions, were publilhed after his death by Swift. " AU fir William Temple's writings," fays one of his biograpl.crs, " difplay much acquaintance both with books and men, and are entirely free from the li- centioufnefs fo prevalent in that age. Their ftvle is negli- gent and incorred, but agreeable, refembling that of ealy and pohte converfation." Hume's Hift. vol. vii. 8vo. 4 T E M Biog. Brit. Gen. Biog. Account of his Life, &c. prefixed to the folio edition of liis Works, in 2 vols. Lond. 1720. Sir William Temple did not cfcape the lafti of criticifm, and inch was his vanity or irritabflity,or perhaps a compofition of both, that his indignation was roufed, and he expreffed him- felf in the following terms: "Thecriticksare a race of fcholars I am very little acquainted with ; having always efteemed them but little brokers, who, having no ftock of their own, fet up and trade with that of other men, buying here and feUiiig there, and commonly abufing both fides, to make out a little paltry gain, cither of money or credit, for themfelves, and care not at whofe coft." In another place he fays, " there is, I think, no fort of talent fo defpicable, as that of fuch common criticks, who can at beft pretend to value them- felves by difcovering the defaults of other men, rather than any worth or merit of their own : — a fort of levellers, that will needs equal the beft and richeft of the country, not by improv- ing their own eftatcs, but reducing thofe of their neighbours, and making them appear as mean and wretched as themfelves." Temple, in Geography, a town of the province of Maine, in the county of Kennebeck, containing 482 inhabitants Alfo, a townftiip of New Hampfliire, in the county of Hillf- borough, containing 941 inhabitants ; 70 miles W. of Portf- mouth. Temple, Le, a town of France, in the department of the Lot and Garonne ; 7 miles W. of Villeneuve d'Agen. Temple^5(^{)', a bay on the N.E. coaft of New Holland, to the S. of Cape Grenville Alfo, a bay on the E. coaft of Labrador. N. lat. 52° 25'. W. long. 55° 50'. TEMPLEMORE, {I r. the Great Church,) a poft- town of the county of Tipperary, Ireland, where there was formerly held a fair for wool, which lafted feveral days. It is 75 miles S.W. from Dublin. TEMPLE PATRICK, (;'. e. Patnd--s Church,) a poft- town of the county of Antrim, Ireland, on the river Six- mile-water ; 4^ miles E. by S. from Antrim, on the road to Belfaft. TEMPLERS. See Templars. TEMPLES, in Jnatomy. See Tempora. TEMPLETON, in Geography, a town of America, in the ftate of Maffachufetls, and county of Worcefter, con- taining I 203 inhabitants. TEMPLETONIA, in Botany, is dedicated by Mr. R. Brown, to the honour of John Templeton, efq. of Orange Grove, near Belfaft, a gentleman whofe enquiries have much enriched our knowledge of Iriih plants, and whofe name confequently often appears in the pages of the Flora Bri- lannica and Erig/i/h Botany. — Brown in Ait. Hort. Kew. V. 4. 269 Clafs and order, Diadelphia Decandria. Nat. Ord. Papiitonacea, Linn. Legiimino/x, Juff. Gen. Ch. Cal. Perianth inferior, of one leaf, fimple, bell-fliaped, with live rather unequal fegments in the limb, permanent. Cor. papilionaceous, of five petals. Standard elliptical, afcending, entire. Wings nearly the length of the ftandard, linear-oblong, obtufe, with a fmall tooth near the bafe at their upper edge. Keel a Httle ftiorter than the wings, oblong, flightly curved, of two half-ovate petals, cohering near the extremity, with ftiort claws. Stam. Fila- ments ten, all combined into one tube for more than half their length, fcparate above, afcending, five alternate ones rather the ftiorteft ; anthers uniform, fmall, oblong, incum- bent. Fiji. Germen ftaLked, linear-awlftiaped ; ftyle awl- ftiaped, afcending ; ftigma capitate. Per'ic. Legume ftalked, linear-oblong, compreffed, obliquely pointed, of one cell and two valves. Seeds eight or ten, oval, pohfhed, the fear of each bordered with a prominent creft. Eff. Ch. Calyx fimple, with five rather unequal teeth. Keel T E M T E M Keel oblong. Stamens all connefted. AnUiers uniform. Legume ilalked, compreffcd. Seeds numerous, crefted. I. T. retufa. Wedge-leaved Templetonia. Ait. n. I. (Rafnia retufa; Venten. Malmaif. t. 53.) — Gathered by- Mr. Brown, on the fouth-weft coaft of New Holland, from whence feeds were fent to England by Mr. Peter Good, in 1803. This is a greenhoufe fhrub, flowering in fpring and fummer. Stem about a yard higli, with ftraight, angular, fmooth, leafy branches. Leaves about an inch and half long, alternate, on fhort ftalks, fprcading, entire, emar- ginate, fmooth. Stipulas in pairs, fmall, oval, deciduous. Flowers lateral, axillai'y, folitary, on fimple ftalks, which arc rather fhorter than the leaves. Calyx dcilitute of the imbricated appendages which make a principal part of the charafter of the neighbouring genus Sootti.^. (Sec that article.) Petals near an inch long, of a deep crimfon. Le- gume two inches long, and half an inch broad, (lightly , tumid where each feed is lodged. TEMPLEUVE en Pefvele, in Geography, a town of France, in the department of the North ; 7 miles S.S.E. of Lille. TEMPLIN, a town of Germany, in the Ucker Mark of Brandenburg, fituated between the Bodenfee and Dol- genfee. In the year 1735, this place was totally confumcd by fire, but has been rebuilt to very great advantage ; its ftreets being now broad and ftraight, and its houfes uniform, exclufive of a fpacious market-place in it, which forms a re- gular quadrangle, infomuch that at prefent it is one of tlie moil beautiful towns in all the Mark. It carries on a very large trade in timber, which is greatly promoted by'means of a canal, newly made. In 1806 it was taken by the French, under the duke of Berg ; and the prince of Hohenloe, who had retired hither after the battle of Jena, was made prifoner; 15 miles S.W. of Prenzlow. N. lat. 53° 5'- E. long. 13"° 34'. TEMPLUM SosTRATi, the name of a kind of fur- gical bandage defcribed by Galen. He alfo defcribes another, under the name of templuni par-uum yfpolloriit lyru. TEMPO, Ital., time, or meafure, in Mujic. Tempo Ordinario, ufual time. Tempo di Gavotta, gavot time. See Gavotta. Tempo di Minuetto, minuet time. A Tempo, or a tempo prima, after a paufe, or rallentando, or ad libitum, implies a return to the firft time in which a movement is begun ; and in recitative, where, in general, no time is kept, a tempo, in an accompanied recitative, implies a regular time. TEMPOAL, in Geography, a town of Mexico, in the province of Guafteca ; 50 miles S.E. of St. Yago de los Valles. TEMPORA, in Anatomy, the anterior and lateral parts of the head, where the fltull is covered by the temporal mufcles : the temples in common language. See Cra- nium. TEMPORAL, Temporalis, a term frequently ufed for fecular. In which fenfe it ftands oppofed to eccle- Jiafiical. ' Pope Boniface wrote to Philip the Fair of France, that he was fubjeft to him, both in fpirituals and temporals. At prefent, all the doftors on this fide the Alps own the fupremacy of kings in temporals. Temporal Aaion. See Action. Temporal Augment. See Augment. TEMPORALIS, Temporal, in Anatomy, an epithet apphed to various parts about the temples ; thefe are a fuper- ricial, a m ddlc, and two deep-feated temporal arteries ; a temporal bone on each fide of the head ; a temporal vein ; Vol. XXXV. a temporal mufole ; and temporal nerves. See the rcfpeflivc articles. TEMPORALITIES, or Tf.mporalties, the tempo- ral revenues of an ccclcfiaftic ; particularly fuch lands, te- nements, or lay-fees, tithes, &c. as have been annexed to bifhops' fees by our kings, or other perfons of high rank in the kingdom. Sec Revenue. The temporalities of a bifhop, &c. Hand oppofed to his fpiritualities. See Vacation. The canonifts on the other fide of the Alps, anciently gave the pope a power over the temporalities of kings. Yet pope Clement V. owned frankly, that his prcdcceflor Boniface VIII. liad exceeded the jull bounds of his au- thority, in meddling with the temporalities of the king of France. Fcvret. TEMPORALIUM Gustos. See Gustos and Va- cation. Temporalium Rejlitutione. See Restitutione. TEMPORARY Fortification. See Fortificatiov. Temporary Hours. See Hour. TEMPOREGIATO, in the Italian Muftc, fomctimcs fignifies, that the muficians who accompany the voice, or the perfon who beats time, (hould prolong fome particular part thereof, to give the aftor or finger room to exprefs the paffion he is to reprefent, or to introduce fome graces, by way of ornament to the piece. Tbmporroiato is alfo ufed in a different fenfe, for a tempo, or a t^mpo giujlo. TEMPORUM OssA, in Anatomy, two bones of the cranium. See Cranium. TEMPSCHE, in Geography, a town of France, in the department of the Scheld ; 10 miles S.W. of Antwerp. TEMPTATION, Tentatio, mTheology, an induction or folicitation to evil, whether arifing from the world, the fie(h, or the devil. Our Saviour's temptation, previous to the commencement of his public miniftry, has been a fubjeft of difcuflion and controverfy among learned divines. The evangelical account of this tranfaftion may be found in Matt. iv. 1 — II. Mark, i. 12, 13. Luke, iy. 1—12. It has generally been fuppofed, that the evangelical hiftory of our Lord's teAptation is to be underftood as a narrative of outward tranfaftions : that the devil tempted Chrift in per- fon, appeared to him in a vifible form, fpoke to him with an audible voice, and removed him corporc.illy from one place to another ; and it muft be allowed that thefe fuppofitions are warranted by the literal interpretation of the hiftory. Neverthelefs, this interpretation is liable to a variety of ob- jeftions. It is unfuitable to the fagacity and pohcy of the evil fpirit. Why, it has been fuggefted, (hould the devil aifault our bleftcd Lord at all, and what advantage could he ex- peft to gain over him ; more efpccially when he came to him in perfon, and appeared before him in a vifiblc form, and under his own proper charafter, propofing and urging temptations which could proceed only from an evil being ? In order to evade this difiiciilty, fome writers, as archbiihop Seeker and Dr. Cliandler, have coniediircd that the devil appeared net as himjclj, but under tjic ailiimcd refcmblance of a good angel ; and others have fuppofed that he appeared to Cluift in Ihe form of a man. But the hiftory furniflies no ground for thefe conjcdures, and they are equally inconfiftent with the temptations themfelves, confidered in their own nature ; nor can it be pretended that Chrift was ignorant by whom the feveral temptations, and particularly the third of them, waspropofcd; for in his reply, he calls him Satan. Befides, this tranfaftion, acrording to the literal interpretation of it* hiftory, was very ill calculated to promote either the honour T t of TEMPTATION. of Chiift, or the inftrudioi. and confohtion of his difciples. This objeaion IS ftrcnglhened, when we confider, that Chrift mud have yielded vollmtarily to the mere motion and iuftiRation of the devil, and have been acceffary to his own dilhonour, danger, and temptation. His charafter muit have been ratlur degrad.-d than exalted. The temptations prefcnted to Chrift were fuch in their own nature as coukl not afford evidence or excrcife of his obedience, nor of courle fuitable confohtion or iifeful inftniaion to his foUowers, under real and powerful trials. Moreover, it has been objefted to the common opinion , that it afcribes to the devil the perform- ance of the greatcft miracles, and of things not only preter- natural, but abfurd and impoflible, for fuch we mull regard his (hewing Chrift all the kingdoms of the world from an exceedingly high mountain, and alfo whatever con- ftitutes the glory and grandeur of its kingdoms. If we are under a necefBty of deviating from a literal, and of adopt- ing a {igurative intctpretation of the tranfaftion recorded in th?8 hiftory, we are warranted in fo doing by other inftances of a fimilar kind, that occur ui the facred writings. Thefe writings relate things as aftually done, which neverthelels were only tranfaftcd in a vilion. Cafes of this kind fre- quently occur in fcripture ; for which we might refer to Genefis, xxxii. 30. Hofea, i. and iii. .Teremiah, xiii. xxv. xxvii. Ezekiel, iii. iv. v. vSt. Paul caUs his " being caught up into the third heaven" and " into Paradife, a vifion and revelationof the Lord." (zCor. xii. 1— 4-) In conformity to thefe genera] principles, fome writers of eminene have proceeded in forming their judgment concerning the tempta- tions of Chrift ; and conftraincd by fuch objcftions as we have already briefly ftated, they have abandoned the opinion that thefe temptations are to be undcrftood as outward tranfac- tions, inafmnch as the things therafclves were improbable, and even imprafticable in their own nature ; and inafmuch as the real performance could anfwer no valuable purpofe. Calvin allows, in his note on Matt. iv. 5, that feveral cir- cumftances in this hiftory agreed beft to a vifion ; and the generality of later writers have admitted, that the devil's (hewing to Chrift all the kingdoms of the world, and all their glory, in a moment of time, was done by fome flfti- tious fcenery, from a perfuafion, that it could not be done in any other way. Hence it has been argued by others, tliat if one of the temptations were prefented to Chrift in ▼ifion only, why might not the two others be prefented to him in the fame manner. Adverting to the hiftory itfelf, it is alleged, that the text, inftead of pofitively and exprefsly afferting that the temptation of Chiift was a real outward triflfaftion, contains clear intimations, and even direiSl afler- tions of the contrary'. Thus, in the pafl^age relating to the exhibition of the kingdoms of the world, and all their glory, in one view, and in a fingle point of view, the evangelift is not fpeaking of the real fight of all thefe objefts j but he muft defign to be underftood of what was inftantaneoufly exhibited to the mind. Other plain intimations occur, that Chrift's temptation is not to be underftood as an outward traiifaftion ; and it is alleged by the advocates of this opinion, that all the evangelifts who have mentioned this affair, do, in cxprefs terms, affirm that it paffed fpiritually, and in iiijion, or that it was merely an ideal or mental repre- fcntation. Some of thofe bibhcal critics, who confider this hiftory as a recital of vifionaiy reprefentations, maintain that thefe vifions were framed by the devil, and that the temptations are to be afcribcd to his immediate agency : thus denying the power of Satan over the body of Chrift, and granting him a nobler empire, a fovereign influence over the mind. Some have indeed fuppolcd that Chrift's temptation was r.othing more than a bare meditation of our Lord upon fuch trials as might polTibly be propofed by the great tempter of man- kind. But it is ueedlefs to make any obfervations on a view of the fubjeft, which is altogether unfupported by the hiftory. Another opinion has been propofed by a very able writer, in favour of which he has adduced a variety of argu- ments, that have given fatisfaftion to many pcrfons who have examined this fubjeft. Mr. Fsvmcr (in his Inquiry into the Nature and Defign of Chrift's Temptation in the Wildernefs) reprefcnts our Lord's temptation as befalling- him while he was under a prophetic vifion, of which the Spirit of God himfelf was the immediate and fole authoi. Accordingly he confiders the temptation of Chrift, neither as an outward tranfaftion, nor diabolical delufion, but as a divine vifion. At the time when this event occurred, ouv Saviour was aftually in the wildernefs, and therefore whei: the evangelift fays, that " Jefus was led up of the Spirit into the wildernefs," or as our author more literally renders the words, " then was JeiJus brought (or carried) into the v/ildernefs by the Spirit," he intimates, that into a wildernefs our Lord feemed to himfelf to be carried, or thither he was tranfported in vifion by a prophetic divine afflatus. The ex- prcfhons ufed by the other evangelifts, Mark and Luke, are faid to confirm the explication thus given of the language of St. Matthew. Upon the whole, the meaning of the evan- gelifts will be, " Chrift was brought into a wildernefs (not merely under a divine direftion, but) under the full influence of the prophetic Spirit, making fuitable revelations to his mind, and giving him a view particularly of his future trials." And thefe trials are defcribed as " temptations of the devil," on account of the particular mode of their being revealed, being couched under the figure of Satan coming to him, and urg- ing temptations. Our author, proceeding to examine the proper intention of this prophetic vifion, obferves, that the feveral fcenes which it comprehends, though prefented to Chrift in the form, and capable of anfwering the end, of a prefent trial, were direftly intended as a fymbolical predic- tion and reprefentation of the future difficulties of his office and miniftry. The firft fcene in Chrift's vifion was proba- tionary, ferving to difcover the prefent turn and temper of his mind ; and alfo prophetical, having a reference to his fu- ture miniftry, through the whole courfe of which he was prefTcd with the fame kind of temptations, and refifted them upon the fame principles. This part of the vifion, therefore, conveyed this general inftruftion : " that Chrift, though the fon of God, was to ftruggle with the affiifting hardfhips 01 hunger and thirft, and all the other evils of humanity, like the lowefv of the fons of men ; and that he was never to exert his divine power for his own perfonal relief, under the moft preffing difficulties, or for the fupply of his moft urgent occaCons ; but with rcfignation and faitTi to wait for the in- terpofition of God in his favour." The fecond fcene of this vifion was Jerufalern, the metropolis of Judea nnd the feat of power ; it was the temple of Jerufalem, where the Jews expeifted tlie firft appearance of their Mcffiah ; it was the wing of the temple, the eaftern front of it, which com- manded a view of the worfhippers below. From this errii- nence Chrift is required to throw himfelf down, in a depend- ence upon the divine proteftion, that fo his miraculous prc- fervation might give evidence of his divine miflion, ai.d in- duce the numerous worfhippers, who were eye-witneffes of it, to acknowledge him immediately as the Mefliah, viCbly de- fcending from heaven, in a manner agreeable to the expefta- tion of the Jews. Such was the propofal, and the temptation was powerful. The principle upon v/hich he rejefted it was, in its fpirit and meaning, this : " the Scripture forbids us to T E M TEN to prefcribe to God in what inilances \w fiiall rxcrt his power ; and as we are not to rufh upou danger without a call, in i-x- peftatiou of aii extraordinary delivoranco ; fo iicitlier ;u-i; we to diiftate to divine wifdom vviiat miracles (hall be wrought for men's conviftion." As this trial luire reference to his fu- ture miniitry, we find that in exemplifyiujr the principle now manifefted, he never needlefsly and unwarrantably cxpofcd himfelf to danger, and then relied on a miraculous interpo- fition of divine power for his refcue ; but he was cautious in declining hazards ; avoiding what might exafpcrate his ene- mies ; and even enjoining fdence with regard to his miracles, when the publication of them was likely to excite envy or popu- lar commotion, and to inflame their minds againft him. In dif- playing the evidences of his divine miflion, he ftill aftcd upou the fame maxim, opening his commiflion, not at Jerufalem, but in Galilee. In order to avoid oftentation and offence, he kept himfelf as private as the objeft of his commiflion would allow; andinfteadof courting the favour of the opulent and powerful, he converfed freely with all forts of people. In many other inftances which an attentive perufal of his hif- tory will furnifh, his miniftry will correfpond to his pro- phetic vifion, in which he was tempted to a public and ollen- tatious difplay of his miraculous powers. In the third fcenc, the propolal was inftantaneoufly rejefted, and not without a mixture of juft indignation. Belides this trial of his tem- per, the fcene before us' pre-fignified the temptation to which he would be ex,pofed in the courfe of his future mi- niftry, during which he was called upon to proftitute himfelf, with all his miraculous endowments, to the fervice of Satan, for the fake of worldly honours, or for gratifying the mif- taken expcftations of the Jewifh people. For a farther illuflration of tliis fubjeft, we mud refer to the work already cited. See alfo archbifliop Seeker's, Dr. Clarke's, Dr. Chandler's, Mr. Mafon's Sermons, on this fubjcft. Ben- fon's Hiftory of the Life of Chrift. Macknight's Truth of the Gofpel Hiflory. Temptation, Tentatia, in our Ancient Lauu-books, is ufed for a trial, proof, or afiay. " Tentatio panis fiat bis in anno." Chart. Edw. I. See Assay, Sec. TEMROOK, in Geography, a famous Ration in the Crimea, fituated at the foot of a iniall mountain, near the northern embouchure of the Kuban, it is now a fingle hut, for the purpofe of fupplying poll-horfes. In Mo- traye's time, who travelled this way in December 171 1, it was a place of greater importance. He delcribes it as con- fiderable for its commerce in hides, caviaie, honey, Circaf- fian flaves, and horfes. He fuppoled that its caille flood where the ancients placed their " Petrous ;" and two emi- nences, he fays, which are named " the point of the ifland," may have been their " Achilleum Fromontorium." This, it is fuppofed, was the fituation of Cimmerium. Pallas con- ieftures, that Temrook may probably have been the " Cim- bricus" of Strabo. TEMS, Fr., time, in Mufe; as a contre tons, againft time. TEMSEMA, mGeograjihi, a provinceof Morocco, fituated on the coaft of tlie Atlantic, to the S. of Sallee. This pro- vince is rich and fertile, and abounds in excellent provifions, of various kinds. Its name feems intended to fignify its fa- lubrity, and tl;e purity of the climate. Temfena appears to be derived from the two Arabic words Taniain Satm, only a year ; as if they fhould fay, that to refide here only a year would be fufficient to infure the fickly the return of their health, and fuch, in faft, is the firm belief of the natives. Corn is very plentiful in this province ; it is of a very excel- lent kind, and the cars frequently bear 70 grains, or more. In the forefts is found a kind of cedar, called ha%ar, of « refinous fmell ; it is a hard and incorruptible wood, and the Moors employ it in building their houfes. This and the neighbounng provinces abound in horfes and lionicd cattle ; tlieir flocks are numerous, and the ca- valry of Temfena is the beft appointed of the empire, ex- cepting the Black troops of the emperor, called Abccd Seedy Bubarric. The population of the dillrifts of Tem- fena and Shavvia is eftimated at 1,160,000 pcrfons. The males of Temfena and Sliawia are a ftrong, robuft race, of a coj)per colour ; their women poflefs much beauty, and have liighly cxpreffivc features ; and the animation of the countenance is iucreafed by the ufe of cl kokol filelly, with which they tinge their cye-laflics and eye-brows. In thefe provinces they are fond of dyeing their hands and feet with a preparation of the herb henna, which gives them a beautiful orange-colour, and, in hot weather, imparts a pleafing coolnefs and foftnefs to the hands, by preventing, in a confiderable degree, the quicknefs of perfpiration. TEMUS, in Botany, a genus which Juffieu has conde- fcended to adopt, by its barbarous name, from the h;u-dly lefs barbarous information of Mohna. Jufl". Gen. 435.^ Clafs and order, Polyavdrla Di^ynia. Nat. Ord. uncertain. Efl". Ch. " Calys three-clelt. Petals eighteen, hncar, very long. Stamens twenty-fix, (horter than the petals. Anthers globofe. Germens two. Styles two. Berry two- lobed. Seeds tunicated." — Native of Chili, where it i« called Temo. This it feems is an evergreen tree, with alter. nate leaves, and ftalked terminal Jlowers. Temus, in Geography, a river of Sardinia, which ruRS into the fea, 4 miles E. of Caftello Arragonefc. TENA, a town of South America, m the province of Quito ; 15 miles S. of Archidona. TENABLE, formed from the French tenir, and that from the Latin tenere, to hold, in the Military Art, fome- thing that may be defended, kept, and held, againft affailants. Tenable is little ufed, but with a negative : v;hea a place is open on all fides, and its defences arc all beaten down, it is no longer tenable. When the enemy has gained fuch an emi- nence, this polt is not tenable. TENACIOUS BomKs. See Tenacity. TENACITY, in Natural Philojophy, that quality of bodies by which they fuftain a confiderable preflure, or force, without breaking. Mem. Acad. Berlin, 1745, P- 47' Tenacity is the oppofite quality to fragility, or brittle. nefs. TENACULUM, in Surgery, an inftrumc.-it ufed in am. putation, for pulhng cut bleeding veiTels that are to be tied by ligatures. TENAGLIA, in Biography, a Roman compofer, men» tioned by Pietro della Valle, as having fet the opera of " Clearco," for that city, about 1634. This feems to have been one of the firil mufical dramas performed at Rome in a public theatre. TENAILLE, in Fortijuaticn, a kind of outwork, con- fifting of two p.irallel fids^, with a front, in which is a re- entering angle. In ftriftnefs, that angle, and the faces which compoff it, arc the lenaillc. The tenaillc is of two kinds ; Jimple and double. Tenaille, Simple, or Single, is a large outwork, con- fifting of two faces or fides, including a re-entering angle. See Plate V. Fortification, Jig. 4. lit. a. Tenaille, DcMe, or Flanked, is a large outwork, confifting of t%vo iimple tenailles, or three faliants, and two re-entering ongles. Fig. zi. lit. e. The great defefts of tcnaiUes are, that they take up too T t 2 much T E N raucli room, and on that account arc aJvautajfcous to the enemy ; that ihf re -filtering angle is undefended ; the height of the parapet hindering tlie feeing down into it, fo that the enemy can lodge there under covert ; and the lides are not fufficiently flaiiKed. For thefe reafons, tenailles are now excluded out of forti- fications by the bell engineers, and never made, but where there wants time to form a horn-work. Tenaille of the Pla.e, is the front of the place, com- prehended between the points of two neighbouring baftions ; including the curtain, the two flanks raifed on the curtain, and the two fides of the baftions which face one another. So that the tenaille, in this fenfe, is the fame with what is otherwife called \.\ieface of a fortrefs. Tknaiixe of the Ditch, is a low work raifed before the curtain, in the middle of tlie fofs or ditch ; the parapet of wliich is only two or three feet higlier than the level ground of the ravelin. There are three different forts {PlateVll. FortiJi:ation, Jig. 6. The firil are thofe which are made in the direftion of the lines of defence, leaving a paffage of three toifes be- tween their extremities and the flanks of the baflions, and likewife another of two toifes in the middle for a bridge of communication to the ravelin. The fecond {fg. 7.) are thofe whofe faces are in the lines of defence, and fixteen toifes long, befides the pafl'age of three toifes between them and the flanks of the baftions : their flanks are found by defcribing arcs from one fhoulder of the tenaille as a centre through the other, on which are fet off ten toifes for the required flanks. The third fort (fg. 8.) comprehends thofe whofe faces are fixteen toifes, as in the fecond fort, and the flanks parallel to thofe of the baftions. The ufe of tenailles, in general, is to defend the bottom of the ditch by a grazing fire, and likewife the level ground of the ravelin, and efpecially the ditch before the redoubt within the ravelin, which cannot be fo conveniently defended from any other place. The firft fort do not defend the ditch fo well as the others, becaufe they are too oblique a defence ; but as they are not fubjeft to be enfiladed, M. Vauban has generally preferred them in the fortifying of places. Thole of the fecond fort defend the ditch much better than the firft, and add a low fl.mk to thofe of the baftions ; but as thefe flanks are hable to be enfiladed, they liave not been much ufed. This defeft, however, might be remedied, by making them fo as to be covered by the ex- tremities of the parapets of the oppofite ravelins, or by iorae other work. Thofe of the third fort have the fame advan- tage with the fecond, and are fubjeft to the fame incon- veniences ; and, therefore, they may be ufed with the fame precaution. Tenailles are efteemed fo necen"ary, that there is hardly any place fortified without them, and it is not without rea- fon ; for when the ditch is dry, the part behind the tenailles ferves as a place of arms, from which the troops may fally, deftroy the works of the enemy in the ditch, oppofe their defcent, and retire with fafety 5 and the communication from the body of the place to the ravelin becomes eafy and fccure, which is a great advantage ; for by that means the ravelin may make a much better defence, as it can be fup- plied with troops and neceffaries at any time. And if the ditch is wet, they ferve as harbours for boats, which may cafry out armed men to oppofe the paffage over the ditch whenever they pleafe ; and the communication from the tenailles to the ravelin becomes likewife much eafier than it would be without them. MuUcr's Elem. of Fort. p. 34. Sec FoRTIi'iCATION. . The ram's-horn is a curved tenaille, raifed in the fofs before TEN the flanks, and prefenting its convexity to the covered vrsy. This work feems preferable to either of the otlier tenailles, both on account of its fimplicity, and the defence for which it 16 conftrufted. TENAILLONS, are works conftruded on each fide of the ravelin, much hke the lunettes : they difler, as one of the faces of a tenaillon is in the diredion of the ravelin, whereas that of the lunette is perpendicular to it. Tenaillons are conftrufted by producing the faces of the ravelin beyond the counterfcarp of the ditch, at a diftance MN [Plate Y\\. Foillf cation, fig. Weft. (.Mr. Varila - 16 46 o J But if its latitude be z8° 12' 54", as in Mafltelyne's Britifli Mariner's Guide, its longitude will be 1 3' 30" more wefterly. The variation (Auguft 1776) by a mean of all Capt. Cook's compafles was found to be 14° 41' 20" W. The dip of the N. end of the needle was 61^52' 30". Teneriffe, a town of South America, in the govern- ment ef the Caraccas, and province of St. Martha ; 80 miles S.S.W. of St. Martha. N. lat. 10° 2'. W. long. 74" 30'- TENESMUS, in Medicine, an inceffant and urgent de- fire to go to ftool, while the evacuations are exceedingly fcanty, of a mucous or bloody appearance, and are attended with fcarcely any relief of the diftrelfing fenfation which preceded them. It may be brought on by any caufe which excites exceflive irHtation in the reftum, either direftly, or by fympathy with neighbouring organs, fuch as the bladder, uterus, proftate gland, or urethra. Thus it is frequently a fymptom of a ftone in the bladder, of inflammation of the neck of that organ, of fiftula, of gonorrhcea virulenta, and alfo of pregnancy. In its moft acute form, tenefmus more commonly T E N TEN commonly occurs as a confequence of difeafe affefting the intoftincs themfelves, and more efpecially of dyfentcry : it is alfo frequently excited by afcarides, or haemorrhoidal tu- mours within the reftum. See Dysemtery. The treatment of this affeftion muft of courfe be adapted to the nature of the irritation which has occafioned it ; and the removal of the irritating caufc will generally be followed by the ceffation of the cffcft. Wlien lliie, however, cannot be accomphlhed, the introduction of opium as a fuppofi- tory into the reftum, or united with a ftarch glyfter, will often procure eflential relief. TENESSEE, in Geography. See Tennessee. TENESUR, a town of Egypt, on the weft branch of the Nile ; 3 miles S. of Amrus. TENET, a particular opinion, dogma, or doftrine, pro- feffedly held by fome divine, philofophcr, &c. The diftinguifliing tenets of the feveral fefts in religion, and philofophy, fee under the names of the fefts them- felves. TENEZ, or Tenes, in Geography. See Tennis. TENEZA, a town of Morocco ; 43 miles W.S.W. of Morocco. TENGA, in Botany, a name by which fome authors have called the cocoa-nut tree, or palma indica nucifera of other writers. TE-NGAN, in Geography, a city of China, of the firft rank, in Hou-quang ; 550 miles S. of Peking. N. lat. 31° 20'. E. long. 1 13° 17'. TENGAPATAM, a town of Hindooftan, on the fea- coaft, ill the country of Travancore ; 20 miles S.W. of TraTancore. TENGI, a town of Perfia, in the province of Schirvan ; 25 miles N. of Scamachie. TENGILO, a river of Lapland, which falls into the Tornea, which, as well as the lake and mountain of Niemi, has been celebrated by Maupertuis for pifturefque beauty. TENGIS, a lake of Independent Tartary, about 140 miles in length by half that breadth, being the largeft lake in Afia after the feas of Aral and Baikal. It is alfo called Balkafh or Palcate. This lake, with two others that are very confiderable, belong to the Kalmucks fubjeft to Cliina. TENGMO, a fmall ifland on the E. fide of the gulf of Bothnia. N. lat. 63° 10'. E. long. 21° 52'. TENG-TCHOUEN, a city of China, of the fecond rank, in Yun-nan ; 1182 miles S.W. of Peking. N. lat. 26^ 2'. E. long. 99° 49'. TENGZEGZET. See Tenzegzet. TENIA. See Taenia. TENIERS, David, the elder, ia Biography, was born at Antwerp in 1582. He received his education in painting in the fchool of Rubens, and under that great artiil's imme- diate tuition, obtained the mode of preparing his grounds, and managing his materials. Intending to continue the ftudy of hiftoric painting, he went to Rome ; but there aban- doned it, and attached himfelf to his countryman, Adam Elrtieimer, under whom he continued for fix years to ftudy landfcape, and from him moft probably acquired the neat- nefs of pencilhng for which his works are efteemed. On his return to his native country, he blended the ftyles of both his mafters, and employed the compound in a novel and ingenious manner, upon fubjcfts original and at the fame time agreeable ; fuch as merry-makings, both interior and at the doors of cabarets ; rural fports , cattle, ftieep, and thofe who tended them ; numerous groups and grotefque combinations ; fuch as the temptation of St. Anthony, &c. For piftures of thefe kinds, he wae fortunate enough to find Vol. XXXV. admirers and purchafers ; and they would ftill havf been th(? theme of admiration, had not his fon, following the fame track, have proved how pofTiblc it was to proceed infinitely farther. He died in 1649, aged fixty-fcvcn. Tknjkks, David, the younger, fon of the foregoing artiil, was born at Antwerp in 1610, and was ^nitiatcd in the art of painting by his father ; but he afterwards became a difciple of Adrian Brauwer, and is alfo faid to have hud the happinefs and honour of receiving inftruftions from Rubent. The fubjefts and the ftyle he adopted were, as we have faid, the fame with thofe em])loyed by his father ; but with a more fertile imagination, he produced compofitions infiiiitely more varied and ingenious, with colouring and eflcft more vivid and engaging, more rich and traiifparent ; and with a facility of execution pcrfeftly enchanting. It it true they feldom exhibit much refearch of character or expreffion ; what there may be of thofe qualities, was more probably a fortunate hit, than any refult of meditation or intention. In this refpedt Jan Stein, and our own Wilkie, have as much the fuperiority over Teniers, as he poftefTes by the power of his execution. At the firft difplay of his powers he was not fo fucccfsful as he merited, but it was not long that he lay neglefted : the archduke Leopold being made acquainted with his merits, iremediately diftinguilhed him by his patronage ; appointed him his principal painter ; honoured him by making him a gentleman of his bed-chamber ; prefcnted him with a chain of gold, to which his portrait was affixed ; and gave him tlie fuperintendance of his gallery of pifturcs, which contained works of the moft diftinguiflied mafters of the Italian and Flemifh fchools. Of this gallery, Teniers made feveral pic- tures, in which he imitated the manners of the various maf- ters fo fucceisfully, as to obtain the name of the Proteus of painting. He alfo amufed himfelf by making compofitions in the ftyles of different painters of renown, as Titian, Tin- toretto, the Baffans, Rubens, &c.; and in their execution endeavoured to imitate the touch of tiiofe great men. Thefe imitations are generally known under the name of pafticcios, and have frequently been miftaken for originals, and fold a« fuch. Thefe were the amufements or indulgcncies of idle fancy ; his fame refts for more full and honourable fupport upon his original produftions in his own proper ftyle. He was a con- ftant and faithful obferver of nature ; and in his favourite fubjefts, village feftivals, fairs, and merry-makings, he has ex- hibited, with a moft engaging freedom, the manners and cha- rafters of his countrymen. That he might conveniently mingle with the fcenes he chofe to reprefent, he eftablifhcd himfelf in the village of Perk, between Antwerp and Mech- lin, and there, with a painter's eye, he obferved the undif- guifed impulfe of the natural charaftcr of the lower clafs among the people, and has left many beautiful and plcafing remembrances of occurrences uninterefting, nay fometimea difgufting ill themfelves, but rendered i'iig.iging by his de- lightful mode of reprefenting them. One peculiar charm there is to be found in the beft pifturcs of Teniers, more per- feftly obtained than in the works of other artifts, and that is, the complete effeft of atmofphcre, filvery, pure, and natural ; Claude de Lorraine himk-lf docs not furpafs him ; and this truth, though yielded on fimple materials, in fcenes flat aiid infipid in their forms, yet makes amends for their na- tural want of intcreft by its truth and fimplicity. In the interior of apartments, of the cottage, the cabaret, the guard-room, or chemift's laboratory, he is not Icfs ad- mirable by his clcarncls and precifion than in his exteriors. He furpalfcd Oftade in his knowledge of perfpeftive, and in his freedom! as much as he is excelled by the latter in trutj-. Xx of TEN of tone and completion of cliaraaer. His pencil is exceed- ingly light and dexterous ; and by continual praiftice upon the fame fyllcm, lie liad acquired a promptncfs almoft unparal- leled. This freedom of execution enabled him to paint an immeufe number of pifturcs : it was not unufual for him to finidi a picture in a day ; and he ufcd jocofely to obferve, that to contain all the piftures he had painted, it would be iieceffary to have a gallery two leagues long. He not un- frequently affiiled the landfcape painters of his day, by putting figures into their pidures ; and many works of Ar- tois, Van Udcn, Breughel, and many others, owe an in- creafed value to this circumftance. His works are numerous in the coUcftions of this country, and ftill bear very high prices. Teniers lived to the advanced age of eighty-four, and died at BruiTels in 1694. He had a younger brother named Abraham, who alfo painted the fame kind of fubjcfts in the fame ftyle, and from this circumftance his works are fometimes miftaken for thofe of David, though they are much inferior in tafte and execution. TENINE, in Geography, a town of South America, in the province of Tucuman ; 20 miles S.W. of St. Yago del Eftero. TENIS, a lake of Ruffian Tartary, 60 miles in circum- ference. N. lat. 53° id. E. long. 74° 4'. TENISON, Tjiomas, in Biography, aixhbilhop of Can- terbury, was the fon of the Rev. John Tenifon, reftor of Mundefley, in Norfolk, and born in the year 1636. He received his univerfity education at Benet college, Cam- bridge, of which he became a fellow in 1662. Having officiated for fome time as a tutor in his college, he was pre- fented in 1 665 to the cure of St. Andrew the Great in Cam- bridge, and continued his attention to his parochial duty during the plague. In 1667 he became chaplain to the earl of Manchefter, and obtained a reftory at Huntingdonfhire. His firft publication appeared in 1670, and was entitled " The Creed of Mr. Hobbes examined, in a feigned Con- ference between him and a Student in Divinity." In 1674 he was chofen principal minilter to the church of St. Peter's Mancroft, Norwich ; and in 1678 he publiflied a " Difcourfe of Idolatry," and in 1679 " Baconiana," or fome pieces of the great lord Verulam, with a general account of his writings. As he was one of the royal chaplains in 1680, he graduated D.D., and was prefented by the king to the vi- carage of St. Martin's-in-the-Fields, London. As an an- tagonift. to popery, the apprehenfion of which was then very prevalent, he wrote feveral works againft it, and alfo againil Socinianifm ; and whilft he was guarding the church againft thofe whom he conceived to be its enemies, he ac- quired ftill greater honour by liberal benefaftions to the poor, and by laying the foundation of an endowed fchool and public library, which he afterwards completed. He blended gravity with moderation to fuch a degree, as to command general efteem ; and accordingly he was felefted by the un- fortunate duke of Monmouth to prepare him for his execu- tion. He alfo conduced himfelf with fo much prudence at court, that he is faid to have had a perfonal intereft even with James II. In the reign of William he avowed himfelf a friend to the dift'enters and toleration ; and after his pro- motion to the archdeaconry of London, he was appointed one of the commiffioners for reviewing the Litany, with a \-iew to the comprehenfion of the Separatifts. He thus re- commended himfelf to queen Mary, and by her intereft he obtamed the fee of Lincoln, in 169 1. Within three years he was unexpededly advanced to the archiepifcopal fee of Canterbury, more on account of his moderate and pacific principles, than for any preeminence to which he had at- 8 TEN lained among men of letters or theologians. He attended queen Mary on her death-bed ; and incurred the feverc animadverfions of the deprived biftiop Ken, for not having reminded her majefty of her culpable want of duty to her father, by confenting to wear a crown which rightfully be- longed to him. His conduft during the reign of king Wil- liam was uniformly confiftent with his principles, and both were fo pleafing to his majefty, that he diftinguilhed the prelate by many tokens of refpedl and confidence. In the reign of queen Anne, he was not, as we may naturally ima- gine, much regarded ; more efpeciall)' as he retained his juft ideas of toleration, and refifted, though not without a ftiarc of obloquy, fome of the high-church meafures which were then countenanced. Neverthelefs he difplayed on various occafions his attachment to the eftabliftied church, as well as his habitual bounty to the indigent. His laft public aiS. was the corpnation of George I.; and afterwards finking under the decay of advanced age, he clofed his life at Lam- beth, December 17 15, in the leventy-ninth year of his age. As he left no iffue, he bequeathed a confiderable part of his property to charitable purpofes. His charafler was uni- formly refpeftable ; and his conduft in difficult times was ir- reproachable and exemplary. Biog. Brit. Gen. Biog. TENMENTALE, or Tenmantale, in our indent Cujloms, originally fignifies the number of ten men, which number, in the time of the Enghfli Saxons, was called a decennary ; and ten decennaries made what we call an hundred. Thefe ten men were bound for each other to preferye the public peace ; and if any of them was found guilty of a breach of it, the other nine were either to make fatisfac- tion, or to bring the criminal before the king. Tenmentale was alfo ufed for a duty, or tribute, paid to the king, confifting of two (hillings for each ploughland ; probably thus called, becaufe each perfon of the decennary was bound to fee it paid. TENNA, in Geography, a river which rifes in the Apen- nines, and crofling the marquifate of Ancona, runs into the Adriatic, about 4 miles E.N.E. of Fermo. TENNE', Tenny, or Taiuney, in Heraldry, a bright colour, made of red and yellow mixed ; fometimes alfo called briijk, and exprefl'ed in engraving by diagonal lines drawn from the dexter to the finifter fide of the ftiield, ti'a- verfed by perpendicular lines from the chief ; and marked with the letter T. In the coats of all below the degree of nobles, it is called tenny ; but, in thofe of nobles, it is called hyacinth ; and, in princes' coats, the dragon's head. TENNEAH, in Geography, a town of Bengal ; 35 miles N. of Midnapour. TENNEBERG, a mountain of Saxony, in the princi- pality of Gotha ; 4 miles S.W. of Gotha. TENNELIE'RES, a town of France, in the depart- ment of the Aube ; 4 miles E. of Troyes. TENNESSEE, one of the United States of America, fituated between 35° and 36° 30' N. lat., and 4° 26' and 13° 5' W. long, from Waftiington. It is bounded on the north by Kentucky end part of Virginia, on the fouth by Georgia and the Miffifippi territory, on the eaft by North Carolina, and on the weft by Mifiburi territory. Its extent from north to fouth is 102 miles, and from eaft to weft 420 miles. Its area is 40,000 fquare miles, or 25,600,000 acres. The Indian claim has been extinguiflied in X.\ro por- tions of this country, the eaftern and the weftern, compre- hending one-third part of the ftate. The former is bounded north by Virginia, from the fouth-eaft corner of Kentucky, to the north-weft of North Carolina ; eafterly by North Carolina ; TENNESSEE. Carolina ; wofterly by Cumberland mountain, Emery's river, &c. ; and fouthcrly by a line marked from place to place, as a continuation of the Cherokee boundary. The wellern traft, thus purchafcd of the Indians, lies on Cum- berland river, and is bounded north by Kentucky ; callerly by a line running from the nortli-ea(l to the fouth-wcil ; and fouth and weft by a line of feveral thoufand angles, run ac- cording to the TennelTee Ridge, which feparatcs the waters of the Cumberland from thofe of the Tcnncflee river. The general courfe of this ridge-line is firfl wefterly, and then north-wefterly ; which, imagining the zigzag rtduccd into two ttraight lines, makes the figure of the Iraft a trapezium. The longeft fide is that adjoinmg Kentucky, the length of which, afcertained by meafurement, is nearly i6o miles. The length of the eafterly fide is about 90 miles. The eaftern is generally called the Holfton fettlement, and the weftern the Cumberland iettlement, from thofe two prime rivers, which traverfe the countries refpeftively. Between thefe fettlements lies a fpacious wildernefs, which the Che- rokees claim and traverfe in hunting, and which, from one limit of their claim to the other, as the road goes, is about 70 miles wide. This ftate, as it was ercfted and organized in 1796, is divided into three diftridts. The eaftern fettlement is divided into two diftrifts, Waftiington the eaftern dif- trift, and Hamilton the middle diftrift. The weftern fettlement is the third or Mero diftrift. The number of counties, &c. may be feen in the following topographical table. Counties. Anderfon Bledfoe Blount Campbell Carter Claiborne Cocke Granger Greene Hawkins JefFerfoii Knox Rhea Roano Sevier Sullivan Waftiington Eajl Tennejfee. No. Inhabiiants. Cliief Towns. 3959 - 8839 3259 2668 Maryfville. Maryville. 4190 Elizabethtown, 4798 Tazewell. 5154 6397 Newport. Rutledge. 9713 Greenville. 7643 7309 ■10171 Rogerfvillc. Dandridge. Knoxville. 2504 - 5581 Waftiington. Kingfton. 4595 - 6847 7740 SevierviUe. BlountCville. Joneftjorough. 101367 Wejl Tennejfee. Bedford - - 8242 Shelbyville. Davidfon - . 15608 Nafhville. Dickfon . 4516 Franklin - - 5730 Winchefter. Giles - 4546 Pulafld. Hickman - - 2583 Humphrey - 1511 Jackfon . 5401 Williamfon. Lincoln - 6104 Fayetteville. Montgomery - 8021 Clarkefvilfe. Maury - 10359 Columbia. Overton - 5643 Monroe. Brought forward 78264 Robertfon - 7270 Springfield. Jefferfon, Rutherford - 10265 Summer - 13792 Gallatin. Smith - 11649 Dixon's Spi Stuart . 4262 Wilfon . 1 1952 Lebanon. WiUiamfon - '3^53 Franklin. White - 4028 Sparta. Warren - 5725 M'MinviUe. Carry forward 78264 160360 Tiie following counties have been laid out fince the laft; cenfus was taken : Greenville, Wayne. The eaftern part of this ftate is mountainous, the middle part hilly, and the weftern part moftly level. The climate among the mountains is faid to be delightful ; in the middle pai-t, temperate and agreeable ; in the weftern part, hot in fummer, and mild in winter. The difeafes to which the adult inhabiiants have been moft liable are pleurifics, rhenmatifms, and rarely agues and fevers ; but, upon the whole, the inliabitants are generally healthy, and tliis falu- brity of the ftate has been partly attributed to its having few ftagnant waters. The principal rivers of this ftate are the Cumberland, the Holftein or Holfton, the Tenneftee, the Clinch, the Notachuckey or Nolichucky, the French Broad, the Hiwaffce, the Duck, the Redfoot, the Obian or Oby, the Forked Deer, and the Wolf. The chief of thefe rivers ai'e defcribed under their appropriate names. The mountains in this ftate are numerous ; fome of tliem, particularly the Cumberland (which fee), or Great Laurel Ridge, are the moft ftupendous piles in the United St.-ite8. Stone, Yellow, Iron, Bald, Smoky, and Unaka mountains adjoin each other, and form, in a dircftion nearly north- eaft and fouth-weft, the eaftern boundary of the tlate. In thefe mountains are innumerable caverns and cafcadee. North-weft from thefe, and fcparated from each other by vallies from 5 to 15 miles wide, rife Bay's mountain. Cop- per Ridge, Clinch mountain, Powell's momitain, and WeU ling's Ridge. The four laft terminate north of the TennefTee river, and thefe, as well as the others, are branches of Vir- ginia mountains. They are all encircled by vallies, which open channels for rivers and roads for paftagc. Although the foil on the mountains is poor, that of the vallies is fer- tile ; improving in the middle of the ftate, and in the weflem part becoming rich. It produces cotton, which is tlie ftaple commodity, and the principal article of export, tobacco, indigo, Indian corn, hemp, flax, rice, wheat, rye, oats, barley, and all kinds of vegetables in high perfeftion. The trees and plants found in this ftate are poplar, hickory, black and white walnut, all kinds of oaks, buck-eye, beech, fycamore, black and honey locuft, aih, hornbeam, elm, mulberry, cherry, dogwood, faftafras, papaw, cucumber- tree, coffee -tree, and the fugar-tree. In the eaftern dillrift is a fpecies of pitch-pine, ufeful for boards, timber, and tar. The under-growth, in many places, and efpecially in low grounds, is cane, fome of which is upwards of 20 feet high, and fo thick as to prevent any other plant growing : there are alfo Virginia and Seneca fnake-root, ginieng, Carolina pink, angelica, fenna, lobelia, Indian phyfic, Ipice-wood, wild plum, crab-apple, haws, hazel-nuts, fweet anifc, red bud ginger, fpikenard, wild hop and grape vines. The glades are covered with wild rye, wild oats, clover, bufTalo- X X 2 gtafs, TENNESSEE. grafs, ftrawbtrrics, and pea vines. On the hills, at the heads of rivers, and in fome high cliffs of Cumberland, aie found majellic red cedars ; many of thelc trees are four feet in dramcter, and forty feet clear of limbs. The commerce of this (late is much facilitated by the rivers TennelTee and Cumberland, and their refpedive branches. Both thefe rivers empty into the Ohio, (horlly after they pafs the north boundar)- of the ilate. As the waters of the Cumberland from Na(hville, and of the Tenncffee from the Mtfcle Shoals to the Ohio, arc navigable to the Ohio and Miffifippi, the people of courfe, who live in this or the adjacent country, have the fame advantages of water conveyance for trade, as thofe who live on the Ohio or MilTifippi, to New Orleans or elfewhere. Befidcs, there is another probable avenue through which trade will be carried on with this and the ad- jacent country, which is from Mobile, up the waters of the Mobile river as far as it is navigable ; thence by a land car- ria k ; with antenna:, mouth, bafe of the abdomen, and legs, yellow. Me.somelas. Abdomen yellowilh ; back black ; arcs yellowifli. PuNCTUM AI,BU^f. Body black ; abdomen at the fides white ; hinder thighs red. Found in Germany. f Blanda. Black ; abdomen in the middle red ; hinder thighs with a white fpot. Quadrimaculata. Black; hinder feet red ; two fpots at the bafe white. * RuFiPEs. Body black ; abdomen with two yellow belts ; feet red. *Campestris. Body black ; abdomen with an unequal yellow belt ; antennae and legs yellow. *Atra. Body black ; feet red. *ViRiDls. Body green ; abdomen above brown. * Ovata. Body black ; thorax above red ; larva grecnilli, fprinkled with a kind of white powder. Alni. Body black ; head and thorax red. * C^RtXESCENS. Violet ; abdomen yellow ; wings with wings fulvous, or deep yellow a brown fpot. * SfLPirURATA. Black ; feet, legs and fcutellum *Pavida. Black; llie abdomen with liuee fugmcals, and feet ferruginous ; larva green, fjirinkletl wkli \Wiitc fa- rina ; head yellow. * Ros;i:. Black ; abdomen yellow, and ridge of the primary wings black ; larva yellow, [xjintod with black. • BiciNrpA. Body black ; bell of the abdomen, anus, mouth, and legs yellow. CiNCTA. Body black ; the abdomen with a white belt ; perhaps a variety of the fornvcr. •LiviDA. Body black; antcnnx before tlic white. AlbicORNIS. Black ; antenna: at the apex white ; tellaceous ; wings at the apex brown. Found in Italy. GoNOGRA. Body black ; knees tcftaccous. Found in Gt-rmany. Nigra. Whole body black, fmooth ; larva * yEriiiOPs. Smooth, black ; pale. Rap.?^;. Body black ; belly, whitifh. Septentriomalis. Feet pofterior, comprelTed and di- lated ; larva gregarious, green, fpotted with black ; yellow apices. Opaca. Black ; thorax with a fpot on both fides, red at tlie apex. Found in the gardens of Sweden. Carbonaria. Black, with a white month ; fore-legs teftaccous. Found in Germanv. * Na.'.sata. Yellow ; fcutellum and point of the wings white. * I 2-Punctata. Body black, with twelvt white points. Capke^j;. Yellow ; head, tliorax, and abdomen above, black ; wings with a yellow point. MoRio. Black ; with pale feet. Found in Germany. Annularis. Black, fliining ; antennse white at the apex ; legs ferruginous. In tiie gardens of Auftria, pery, haps a variety of the livida. Fkiuiucinea. Antenna black, annulatcd with white ; body ferruginous ; thorax, breaft, and vertex black. Found as the laft. Crassa. Black ; feet and double points under the fcu- tellum elevated, red. In Audria and Carniola. ALDiCiNXTA. Black; the belt at the bafe of the abdomen and legs with a ring milky. In Auilria and France. Vesi'iformis. Antennae yellow; all the fcgments of the abdomen with yellow margins. In Auftria. Semicincta. Black ; the belt of the abdomen broken behind, yellowifh ; the feet atid abdomen beneath yellow, iu Auftria. Viennensis, Black ; abdomen with five yellow belts ; the bafe of the antennae fulvous. In Vienna. RiBis. Black ; legs and apophyfes of hinder thighs white at the exterior fide. In Auftria. FuLlGiNOs.\. Black, with fuliginous wings. In Auftria. Dealbata. Black; the abdomen on both fides maijted with a white fpot, hinder thighs clavated, yellowifli. In Auftria. Alneti. Yellow ; abdomen above black. In Auftria. H.*:matodes. Black, thorax before on both fides red. In Auftria. Erythrogona. Black ; the apex of the thighs and bafe of the legs red. In Auftria and France. FuLVlVENTRis. Black ; with red and deep yellow ab- domen. Found in Auftria and Carniola. FuLVf\'ENMA. Black ; with the exterior margin of the Found at Vienna, antcnns fubclavatcd ; four Vol. XXXV. Yy fore- TENTHREDO. fore-feet fulphurcous ; the hinder foles with three interme- diate white joints. ,,,,,,- .u * Flaveola. Antcnnar fubclavatcd, black ; bale, mouth, fides, and five fird fegments of the abdomen and feet, •a'nnulata. Yellow; antennx fubclavated, black; apex of the thighs and foles anniilated with black. * RuBiciNOsA. Black ; antcnns fubclavated, and bafe with feet yellow; third, fourth, and fifth fegments of the abdomen ferruginous, * SuBLLATA. Black ; antennse fubulate at the apex ; fecond to the fifth fegments of the abdomen, as far as the hinder margin, legs and foles, yellow, and thefe annulated with black. * MucRONATA. Black, with the feven-knotted antennx and abdomen yellow ; the laft fegments from the fecond to the fourth black ; the apex of the wings brown. * Varia. Black ; mouth, fcutellum, and fcutellar fpots, white ; the hinder fegments of the abdomen and feet fer- ruginous. « Sanguinolenta. Black ; witli the hmder feet lan- guineous. * Dealbata. Black ; the three laft joints of the an- tennae and jaws white ; legs and foles yellow. * Canescens. Grey -downy, brown, with grey wings. * Bifasciata. Brown, with black thorax ; mouth, fcu- tellum, and four fpots at the fcutel, white ; abdomen with two interrupted yellow bands ; margin of the wings and feet yellow. * BiiACfATA. Black, with red thighs ; the bafe of the four hinder legs, and the three penultimate joints of the an- tesm, white. * RuFiPES. Black ; the bafe of the abdomen, with a fpot on both fides, and jaws, white ; four fore-legs red. * Melanoleuca. Black ; mouth, thorax with a fmall line on both fides before the wings ; a fpot on the hinder thighs ; legs, the fides of the abdomen from five to feven fegments, ajid apex, white. * Melanochra. Black ; mouth, four fore-feet, and bafe-flexure of the hinder thighs, yellow. * Leucopus. Black ; the bafe-flexures of the thighs white ; four anterior legs without, and middle of the liinder, white. * Varicornis. Black, with red feet ; fourth and fifth joints of the antennas and hinder legs at their bafe, white. * Obscura. Brown ; with the rib of the wings as far as the fpot and feet teftaceous. * Lixibata. Black ; the hinder margins of the fegments of the abdomen white ; feet reddifli. * ExALBlDA. Black ; with feelers and four legs obfo- letely white. * Ferruginosa. Black ; the antennx ferruginous for- wards ; the bafe and anterior margin of the wings, the firft. and fifth fegment of the abdomen, the legs and foles, white. * Angusta. Black ; body narrow and grey-downy. * LuTEsCENs. Black ; with the abdomen beneath and feet yellow-reddifh. * Albipes. Black ; with legs and foles white. * Flaviventris. Black ; mouth white ; abdomen yel- low ; back and apex black ; feet teftaceous. * PiCEA. Pitchy ; anterior legs before, fpot of the hinder thighs, and bafe, white ; hinder feet red ; the knees and foles black. * FusciPEs. Black ; feet red ; pofterior foles brown. * BiMACULATA. Pale ; eyes, abdomen above the bafe, kreail and two fpots, black. * Lata. Broad, black ; the pofterior fegments of the abdomen white, from the fecond to the fifth interrupted. * Annalicornus. Pale, the antenna: fpotted with black at the bafe ; vertex of a branchy figure, eyes, and the conjugate points at the back of the thorax and abdomen, black. * Scripta. Pitchy; mouth, and on the middle of the fore-part of the thorax the mark refembles V ; the fpot on both fides the fcutellum white ; two fcutellar points wliite ; feet, and under margin of the fegments of the belly, yellow. * Literata. Black ; fegments of the abdomen from the fecond to the fifth in the back, ovated fpot on both fides and margins white ; anterior feet, and four hinder legs on tlie fore-part, white. * MELANORUff.A. Black, with yellow abdomen ; the tranfverfe fpots of the back and anus black. * Geminata. Black, with geminated antennse, and joints and legs pale. * Oc'HROGi'STES. Pitchy ; with the abdomen beneath and feet yellow. * RuFiCAPlLLA. Head and thorax red ; the pofterior margin of the latter and eyes black ; the abdomen and feet yellow. *DuBlA. Black ; thorax before red ; joints whitifh. * Pallescens. Black ; mouth and feet pale. F. Antennts fetaceous ; many Joints. Erythrocephala. Body csruleous ; head red. * Sylvatica. Body black : feet and marks of the tho- rax yellow. * Nemoralis. Body black ; fegments of the abdomen white at the fide. * Cynosbati. Body black ; feet ferruginous, hinder annulated with white and black. Signata. Pale ; thorax and three dorfal longitudinal fpots black. Found in Germany. PopULi. Black-blueiib ; mouth, feelers, and legs yellow. Vafra. Head black, variegated with white ; feet tef- taceous. Found in Sweden. Reticulata. Wings varied with pale and brown, with elevated veins, white and reticulated. Found in Finland. * Betul^:. Body red ; thorax, anus, and eyes black ; wings behind brown. * Flava. Yellow, with the fpot on the wings ferru- ginous. H^morrhoidalis. Black ; with the anus and feet tef- taceous. In Germany. f Nemorum. Middle of the abdomen red ; fcutellum and point on the wings white. Depressa. Head and thorax black ; marks yellow ; abdomen and feet ferruginous. In Auftria and France. Linearis. Black ; legs, and five bands of the filiform abdomen, yellow. In Auftria. BiPUNCTATA. Antennse fub-fetaceous ; nine joints black, and two points of the black fcutellum white. G. Of doubtful Order. Intercus. Black ; with yellow feet and fubclavated antennx. RuMicis. Found on the dock. Ulmi. Found on the leaves of the wild elder. Pruni. Found on the plum-tree. Lonicer^. Brown, tomentofe, ftiining, with fubclavated antennae, and fubfcrruginous wings. * PoLYGONA. Black ; antennx fubclavated with eighteen 9 knoti ; TEN knots ; the hinder margin of the fegments of the abdomen from the third to the fifth ycUow-grecnilh ; the thighs black ; the face anterior at the apex and the legs yellow ; the hinder at the. apex black; the folcs yellow; the linear abdomen comprefl'ed. TENTOLI, in Geography, a town of the ifland of Ce- lebes, near the north extremity, on the weft coaft, which gives name to a road. N. lat. i '. TENTORES, among the Romans, were perfons ap- pointed to hold the clothes of tlie cliariotecrs that contended in the circns. TENTUGAL, in Geogrnphy, a town of Portugal, in the province of Beira ; 7 miles W.N.W. of Coimbra. TENTYRA, or Textyuis, in Ancient Geography, a town of Egypt, and capital of a nome, which took the name of Taityri'i-s, according to Strabo, Pliny, Ptolemy, and Steph. Byz. TENTZEL, William-Ernest, in Biography, a Ger- man antiquary and hiftorian, was born, in 1659, at GreiifTen, in Thuriiigia, and fiiiidied his education at Witteniberg, di- refting the courfe of his ftudies to philofopliy and the Orien- tal languages, and alfo to hiilory, both facred and profane. In 1685 he was appointed a teacher in the gymnafium at Gotha, and entrulled with the care of the duke's colleftion of antiquities and coins. In order to qualify himfelf for the more honourable difcharge of his duties as hiftoriographcr to the houfe of Saxony of the Erneftine line, to which office he was appointed in 1696, he vifited various courts in , , , j- Germany, and carried .^n an epiftolary corrcfpondence with ^""^ }^"° ^'-'^^ ^' ?^""^ ''^ y^"' purchafe under the price of many diftinguifhed foreigners. In 1702 he removed to ['"'-''^'lojd, accordmg^to the Report of the ftate of agricul- TEN has been remarked in the Shropthire Agricultural Report, that it appears beautiful in theory, that there fliould be one rule of defcent in a kingdom only, one tenure of property, and one fcale of political rights ; but that it may be doubled whether fo much uniformity is fuitable to an imperfeA ftate ; or at leall to our prefent degree of improvement. At all events, irregidarities that are not attended with much prac- tical inconvenience, Ihould not be pointed out as obnoxious, in a fcheme that has produced fo much pofitive happinefi, and fo mucli comparative good, as the cunllitution of ihefc kingdoms has afforded. It is Hated too, in the Agricultural Survey of EJTex, tilat freehold ellates are the moil valuable to the immediate proprietor, there can be no doubt ; but the purchafer of 3 copyhold may remember, that the original purchafe is by fo mucii the lower ; and whether he liUs tlie occupation to a tenant, or farms and cultivates it himfelf, he may poflibly make as good interell of his capital as if he had bought a freehold. Perhaps, alfo, its general and final utility to the public, may be nearly or quite the fame. This, the writer thinks, is certain, that copyhold ellates, whether in the handi of the proprietors or tenants, are as well cultivated .as the free, excepting only in the article of timber, and even in that the difference is feldom viCble. The hke may be faid of leafe- hold ellates, and even of thofe in mortmain. In Hertfordfhire, where a large portion of the property is held by copyliold tenure, with a fine certain or at the will of the lord, but which fine never exceeds two years' rent. Drefden, where he was made hiftoriographer to the elcftor of Saxony, king of Poland, by whom he was honoured with the title of counfeUor ; but his manners not being adapted to a court, he obtained leave to retire. What remained of his life was devoted to literary purfuits ; and he died, very poor, in November 1 707, in his 49th year. His works were numerous, among which we may reckon the following : •via. " De Phenice," Vitemb. 1682, 4to.; " De Ritu Lec- tionum Sacrorum,'" Vitemb. 1685, 4to. a work highly commended by Bayle ; " Judicia Eruditorum de Symbolo Athanafiano Iludiofe colleCla et inter fi? collata," Francf. et Lipf. 1687, l2mo. ; " Animadverfiones in Cafimiri Or- dine Supplementum de Scriptoribus Ecclefiaflicis," 1688, l2mo. ; " Cafparis Sagittarii Hiftorici Saxonici Hiftoria Gothona plenior, &c." Jena, 1700, 4to.; " Supplementum Hiftorias Gothonx," ibid. 1701, 410. ; " Supplementum Hill. Goth, fecnndum," ibid. 1701, 4to. ; " Saxonia Nn- mifmatica, ParjI." Francf. et Lipf. 1705, 4to.; " Pars II." 1705. Tentzel was alfo a contributor to feveral literary journals. Gen. Biog. TENUIROSTRjE, in Ornithology, the name of a genus of fmall birds, which feed on infedls, and have flender and ftiarp beaks ; of this genus are the lark, fwallow, red-bread, and a number of others. Ray's Ornithology. TENUME, in Geography, a town of Arabia, in the province of Nedsjed ; 40 miles N. of Aniza. TENURE, in Agriculture, the manner in which pro- prietors and tenants hold their lands, &c. of their land- lords, or other perfons. It may be noticed, that the tenures of lands are extremely various in almoft every diflrift of the kingdom, being, how- ever, chiefly freehold, free-farmhold, copyhold, long-leafehold, or life-leafehold, though there are many other local forts of tenures of land. The freehold is moft probably in the largeft proportion over the whole country, the copyholds in the next, and the leafehold tenures in the fmallcfl, extent. It ture for that diflrift. And it is further fuggefted"in the latter of the two former of the above agricultural furveys, that, with regard to the tenures by which the more tempo- rary occupiers hold their farms, they arc, as already ob- ferved, extremely various, fomc upon leafes of longer or ftorter dumtion, fome without any leafc at all, agreeably to the taftc and pleafure of the landlord ; though by far the greatefl number, cfpecially of thofe in the pofleflion of Uie fmaller proprietors, are let upon leafes of from eight or ten to twenty-one years. And it is obferved, from what has been done in Norfolk and other counties where the tenures are of more length, as from feven to twenty-one years, that the improvement of the land is much conncfted with the pratlice of fuch tenures. And it is likewife fuggefted in the Glouceller Report on Agriculture, that it were much to be wifhed that a general rule could be adopted for the commencement and end of tenures ; as it would ultimately, the writer thinks, be highly advantageous to landlords and tenants, and will probably be one refult of the labours of agricultural focieties. Some fupjiofe tlie freehold tenure to pofTefs the moft numerous advantages, with the feweil inconveniences, of any fort of holding. But many are of opinion that fome other kinds are equal to it, or nearly fo. The forms of tenure throughout moil of the fouthern parts of England, arc prin- cipally thofe of the freehold, copyhold, life-leafe, church- leafe, and college-leafe kinds, both for lives and years. In Cornwall they are for the moil part freehold, with the ex- ception of the lands of ccclefiailical corporations and ancient duchy land, wiiicli is equivalent to copyhold in fee, held under the duke of Cornwall, fubjeft to a fmall annual rent. This fort of land pafles by furrender in the duchy courts, nearly in the fame form as other copyhold lands. But the modern duchy is different from the above ; the occupiers being leffees under the duke, and, in general, arc purchafer* ot an intereil in the land during the continuance of the longefl liver of three lives, the confideration bcijig, in part, Y y 2 _ a fine T E N a fine paid at the time of tl.e grant, and alfo a referved rent durintr the coiitimiaiu-o ot tlie leale. , r • i • jr TIrti- are three different kinds of ci)urcli-leale in this dil- tria ; as demifes to tenants for tlie longcil of tliree lives ; the eonfiderations being money and referved rents ; demifes to manorial tenants for three lives in the fame way ; the takers having the liberty, during the whole time, to under- leafe to other tenants in the manner of copyholds for three lives ; and grants of leafes for twenty-one years abfolute, ving fre(h leafes at the end of every feven g" TEN more injurious and extenfive tlian is generally apprehended* The fame capital employed in the purehale of a leafe for ninety-nine years, determinable on three lives, applied to the (locking, cultivating, and improving a more extenfive occu- pation held at a fair annual rent, and under an encouraging term of years, mull, it is fuppofed, produce, in the contem- plation of fuch property, very different emotions in the mind of the owner : to the occupier the refults are infinitely more advantageous ; and to the public at large, a more abundant fupply is produced than can poflibly be derived from a capi- tal employed in the purchafe of a more narrow occupation on an eventually undifturbed poflefhon of ninety-nine years. But notwithftanding, an opinion prevails with fome noblemen and others in this county, that it is better to realize at forty years' purchafe, than to fuffer the lifehold tenures to fall in without renewal. Fortunately for the future improvement and profperity of the county, the writer fays, this fpecies of tenure is become much leffened within the laft twenty years. In order to accomplilh this prepofterous objeft of the tenant's indojence and pride, it is obferved, he will employ his kft (hil- ling, and incur very heavy obligations among his friends and neighbours, to pay eighteen years' purchafe for a leafe only of that very farm, the fee of which might readily have been bought for about one -third more. Deftitute of capital, and encumbered with obligations contrafted with his family and friends, the farmer enters his new occupation, depending upon cafual and agiftment ftock for the confumption of his pafture herbage. Having httle or no referved rent to pro- vide for, the efforts of himfelf and family are direfted to the annual cultivation of fo much of his land as will pay the parochial and other fmall difburfements, and fupply the bare wants of the mod comfortlefs life it is poflible to conceive, leaving no brighter profpedls to his offspring, than what the lapfe of ninety-nine years may do, by terminating a leafe fo injudicioully purchafed. The fame is the cafe with thefe forts of tenures in many other diflrifts of the kingdom. There is a great number of tenures bt fides tlie above forts hi the midland and more northern counties, fome of which are very curious and fmgular. Tenures under the crown are likewife met with in thefe as well as mod other parts of the kingdom. In that part of the country ufually denominated Scotland, the tenures by which lands are principally held may be clalTed and confidered as thofe of fuperiority, property, and tack ; the firll of which i» merely nominal, and goes no far- ther than that of conferring the right of franchife ; the fecond is a valuable tenure of land, as yielding and implying tlie full ufe and command of it to the fubjeft for all the purpofes of human life, excepting merely political power, which is attached as above, and may or may not be attached to the property ; and the lafl is tlie tenure for a term of years, by which proieffional farmers hold land from proprietors for the purpofes of agriculture. The origin of thefe forts of tenures, which feem to have been of a military or feudal na- ture, is more fully explained in Finlater's Agricultural Survey of the County of Peebles, to which the inquirer on this fubjeft is referred. Tenure, Tenurii, in Law, the manner or condition in which a tenant holds lands or tenements of his lord ; or the fervices performed to the lord, in confideration of the ufe and occupancy of his lands. The kinds of fervicc, and confequently of ten-ures, are almoft inlinite. See Sehvice. Thofe for lands held of the king are either great, or petty which is a re- nevral of the firft. Thefe are firft made in confideration of fines and referved rents, but in the renewals fines only. In the fame diftrift, it has been much the cuftom, in refpeft to the tenure of tenants, to grant leafes tor lives, for the term of ninety-nine years, detenninable on the death of the longeft liTer of three hves, to be named by the taker. On the death of one of the lives named in the leafe, it was ufual for the landlords to confcnt to the adding a new life to the two which remained. The confideration in the primary grant was uniformly a fine in hand of from fourteen to eighteen years rent of the landed eftate, with a fmall referved rent, and fuit and fervice to the manor court ; the renewal commonly a fine only of three years' rent for one life, or feven for two lives, without any alteration of the other rent. A large proportion of the lands here are now held by the tenantry under thefe leafes or tenures, but it muft be noticed, that the number of new grants, or the renewal of old ones, is on the decreafe ; and feldom takes place, unlefs under par- ticular circumftances and motives. The holders under thefe leafes or tenures, which are called leafeholds or fine-leafes, are conftantly fubjefted to all taxes and repairs of every kind, excepting that a fmall pro- portion of the land-tax in fome manors is repaid the tenant, as the land-tax of the referved rent. Under the property- tax, they were rated both as proprietor and occupier, except only that the landlord was liable to the property-tax for his referved rent. It admits of fome doubt whether this mode of leafing or holding property be more detrimental to the lord, the tenant, or the public in general ; but it is certainly a very injudicious and unwife method of proceeding, as it is highly injurious to the agriculture of the county, though at firft fight the fecurity and great length of the leafes might be fuppofed to have the contrary effeft. It is found, however, in praftice, that the circumftance of moft of the holders under thefe leafes having not only exhaufted in their purchafe and re- newal the whole of their capitals, but often confiderably more raifed on them with great difadvantage, counterafts every good that might olhcrwiie have been expefted. It is afTerted that, in common, cultivators of this fort, from the want of capital and other means, as well as the fpeculative nature of aU fuch tenures, are neceffarily feeble and fpirit- lefs, and that they live worfe, work harder, and are more inconvenienced, than any other kind of holders of land. And that where the landlords do not renew, they are frequently fufferers from the dilapidated and exhaufled ftate of the premifes. It is aUb remarked by Mr. Vancouver, in his Account of the Agriculture of the County of Devon, in regard to thefe kinds of life-leafe tenures, that the mifchievous confequences infeparably connefled with, and refulting from, the want of agricultural knowledge in thofe who have the direftion and management of fuch cftates, and who, to cover the want of the necc/fary qualifications of a land agent, moft commonly /emanly, in capite, knight' s fervice. Sec. Thofe held of the lords were very various, hnfe, p-anif See advife the proprietors to grant thofe life-hold tenures fo frequently heard of in this county and South Wales, are by homage, facade, &c. See Base, Frank, &c. The T E P T K 1' The common tenucea at tliis day are, fec-fimplc, ftc-tail, ty courti.fy, in dower, for life, or for years, or by copy of court-roll. Tknuke, Barons by ancient. See Bauos. Tenure, D'ljlurbance of, is a fpecics of injurv which con- fifts in brt'aklng that connetlion which fiibiills between the lord and his tenant, and to which the law pavs fo hij^h a regard, that it will not fuffer it to be wantonly diflblved by the acl of a third pcrlon. If, therefore, tiiere be a tenant at will ol any lands or tenements, and a ilranger, either by menaces or threats, or by unlawful diilretfes, or by fraud and circumvention, or other means, contrives to drive him away, or inveigle him to leave his tenancy, this the law very jnftly conftrues to be a wrong and injury to the lord ; and gives him a reparation in damages againtl the offender by a fpecial aftion on the cafe. Blackil. Com. vol. iii. TENUTE, Ital. in Mujic, generally written ten, from the Italian verb tenere, to hold on, fullain to the lall moment of a note's duration. See Sostf.nuto. TENYA, in Geography, a town of Africa, in the country of Foota. N. lat. io° 15'. W. long. 10° 25'. TEN-YANG, a town of Corea ; 73 miles E.S.E. of King-ki-tao. TENZEGZET, a town of Algiers ; 16 miles S. of Tremecen. TENZY^, a town of Poland, in the palatinate of Cra- cow ; 20 miles W. of Cracow. TEOATZINCO, a town of Mexico, in the country of Tlafcala, where a bloody battle was fought between the natives and the Spaniards under Cortez ; 20 miles E. of Tlafcala. TEOLO, a town of Italy, in the Paduan ; 7 milee S.S.W. of Padua. TEOLY, a town of Hindoallan, in the circar of GwKud ; ' 15 miles S.E. of Gwalior. TEOMAHAL, a fmall ifland in the Sooloo Arohipe- lago. N. lat. 6° 15'. E. long. 120° 51'. TEONA, a fmall iiland near the well coall of Scotland. N. lat. 56= 47'. W. long. 5^ sy. TEOPISCAN, a town of Mexico, in the province of Chiapa ; 60 miles S.E. of Chiapa dos Efpagnols. TEOS, in Ancient Geography, a town of Afia Minor, in Ionia, on the fouthern coall of a peninlula, which became an iiland when the fea was high or much agitated. It was fituated over-againll the ifle of Samos, S.W. of Smyrna, and E. of the promontory of Coryceon. It is celebrated for having been the birth-place of Anacreon. The inhabit- ants were renowned for their courage : they preferred aban- doning their city to living under the tyranny of the Pcrfiane. Teos was treated with mildnefs by the Roman emperors. Bacchus had a magnificent temple here, which Vitruvius has particularly defcribed. Here alio was held a general coun- cil for the management of all the affairs of Ionia, becaufe this city was in the centre of Ionia. — Alfo, the name of a t )wn of Scythia. TEOWENISTA Creek, in Geography, a rircr of Pennfylvania, which runs into the AUeghany, about 5 miles below Hickery. TEPAPA. See Taroatauietoomo. TEPEACA, in Geography, a town of Mexico, in the province of Tlafcala; 15 miles S.S.E. of Pucbla de los Angelos. TEPEGUANA, a diflria of New Brafil, fituated on the Nazas. TEPELLENE', a town of Albania, the birth-place and favourite refidence of Ali, fituated on the banks of a river, which at the diflancc of 60 miles from the fea appears to be «s broad .ns tlie Tiiamcs at Weilaiinlkr brnli^e. The ilrcets of the town, containing about 400 ill-liiiill huufet, are extremely dirty ; but the palace of the vizier ib very magnificent. TEPE-MAXTL ATON, in Zoology. Sec Y^L\sTigrUia. TEPETISTAC, in Geography, a town of Mexico, in the province of Guadalajara ; 60 milts N. of Guadalajara. TEPETOTOIT,. in OrmthMgy, the name of a' Bra- filian h'.rd of the gallinaceous kind, more ufually called m'Uuporauga. Sec CliAX Alcciur. TEPHLIS, or Tklphis, in Ancient Geography, a town of Alia, in the vicinity of Media. TEPHRIA, in the Natural Hiflory of the Ancients, a name given to the grey ophites. TEPHRICA, in Ancient Geography, a town of Afia, in the neighbourhood of Cilicia and Armenia. TEPI-IROMANTIA, Tsjfo/iws.a, \n Antiquity, a fpe- ciej of divination, performed with afhes ; for which fee Potter, ArcliKoL Grxc. tom. i. p. 353. TEPHROSIA, in Botany, from t.;'^v, ajb-coloured, in allulion probably to the ho.^y afpeft of the herbage " Perf. Syii. v. 2. 329." Purfh 489. (Erebinlhus ; Mitchell in Ephem. Nat. Curiof. v. 8. 210?) — Clafs and order, Diadelphia Dccandria. Nat. Ord. PapUionaccji, Linn. Legutuinofs, Juff. Gen. Ch. Cal. Perianth inferior, of one leaf, deeply divided into live flraight, awl-fhaped teeth ; the upper ones rather the Ihortefl ; the loweft rather longer than the reft. Cur. papilionaceous. Standard recurved, l;irgc, roundifh- obovate. Wings half-obovate, obtufe, flraight, rather fhorter than the flandard. Keel broad, rounded, gibbous, compreffed, the length of the wings. Slam. Filaments ten, all firmly united along the middle into a membranous tube ; the tenth feparate at tlie bafe, and in its upper half; all capillary and diflinft at the extremity, fomewhat unequal in length ; anthers terminal, uniform, ovate-oblong. Pifl. Germen feflile, oblong, compreffed, very hairy ; uyle awl- fhaped, angular, afcendlng, hairy along the back ; fligma fimple, recurved, flightly hairy. Pcric. Legume oblong, coinprcffed, hairy, fomewhat falcate or afcending, of two valves and one cell. Seeds feveral, compreffed, kidney- fhapcd, rather angular, flightly feparated from each other by thin, imperfe£t, membraivous partitions. EfT. Ch. Calyx with awl-fhaped, nearly equal, teeth. Stamens all connefted. Legume compreffed, rather coria- ceous, of one cell, with mar.y feeds. Stigma acute. Obf. We have tak'^n our characters f^rom one certain fpecies, T. virg'miana, comparing it with authentic original fp; cimens of Mitchell's Erebinthus, which Linnxus thought the very fame fpecics, but in this he was certainly millaken. It appears to be Mr. Purfli's third fpecies, T. hfpidula; and as far as we can judge, from fpecimens that will not admit of diffeftion, and from Mitchell's dcfcrlption, it is mofl probably of the fame genus, for Mltclicll might over- look the partial union of the llamens, even fuppofing that characlcr to cxill in his plant. If we were certain of this, his name ought, by every right, to be preferred to the more modern one of Perfoon. (See Erehinthus.) The genus moreover is improperly placed in the fixth fcAion of Dia- delphia, while its cffential charaAer indicates that it belongs to the firft. I. T. virginiana. Virginian Grey-Vetch. Purfh n. I. (Galega virginiana ; Linn. Sp. PI. 1062, excluding Hort. ChfF. and Mitchell's fynonyms. Willd. Sp. PI. v. 3. 1244. Ait. Hort. Kew. v. 4. 355. Cicer adrag.iloides (fortS) virginianum, hirfutie pubefccns, 6oribus amplis lubrubentibus ; Pluk. Phyt. t. 23. f. 2.)— Ercd, hoary, and T E P T E P and fhaggy. Leaflets nvimcrous, oval-oblong. Clufter terminJ, manv-flowend — In dry fandy woods, from Ca- nada to Florida, flowering in .Iimc and July. Root peren- nial. Plant about a foot higli. Flowers very handfome, rofe^oloured and vellowilh-white. Purjl}. The fern is fimple, leafy, angular, brown, clothed \yith hoary pu- befcence. Leaves alternate, nearly fefiile, pninate, of from 17 to 21, not quite oppofite, entire leafets, each about an inch lontr, hain,' on both fides, tipped with a minute point. Clujler folitary, various in length, compofed of numerous large _/7oTi;wj, not unlike thofe of a Lupine. Calyx denfely hairy. Legume an inch and a half long, pointed, linear, hairy, fomewhat undulated, and a little curved upward, tumid where the feeds are lodged. Miller appears to have cultivated this plant in 1765. We have never feen a living fpecimen. That we have here defcribed was fent by Kalm to Linnteus. The legumes came from Jacquin's herbarium. 2. T. chryfophylla. Golden-leaved Grey-Vetch. Purfli n. 2. (Galega villofa; Michaux Boreal.-Amer. v. 2. 67 ? PaiJ],. ) — Proilrate, downy. Leaflets five, fomewhat wedge- fliaped, very obtufc. Flower-flalks oppofite to the leaves. Legume nearly ftraight. — Gathered in Georgia by Mr. Enflen, flowering in July and Augufl:. Perennial. Leaf- lets wedgefliaped-obovate ; fmooth above ; filky at the back. Stalis elongated, bearing about three purple ^oiyi";v. The Angular circumftauce of the nearly feffile leaves gives it the appearance of a trifoliate plant, the lower pair of leaflets refembling_/?i^u/rtj. Michaux's fynonym is rendered doubt- ftJ by his not mentioning the fmall number of leaflets, one of the moft ftriking charafters. Purjh. 3. T. hifpidula. Hifpid Grey-Vetch. Purfh n. 3. f' Galega hifpidula; Michaux Boreal-Amer. v. 2. 68. G? picata; Walt. Carol. 188. Erebinthus ; Mitch, as above. Clitoria, n. 3 ; Linn. Hort. Cliff. 498, excluding the very erroneous reference to Burmann. ) — Slender, diffufe, downy. Leaflets numerous, oblong-elliptical, abrupt, pointed. Flower-flalks oppofite to the leaves. Legume falcate, hif- pid. — \\\ pine woods and on flate hills, from Virginia to Georgia. Perennial, flowering from July to September. Leaflets 13 or 15. Stalls elongated, bearing from three to five pale-red^^oTOcrj. PurJh. Every part of this defcrip- tion anfwers to the original fpecimens of Mitchell's plant, but he, as well as Linnceus, fpeaks of the ten\.)\ flamen as being really feparate from the reft. We cannot from our fpecirr.ens determine this point. The ferns are long, branched, trailing, round, and hairy. Leaflets with ftrong oblique tranfverfe veins ; fometimes fmootli above ; always filky beneath ; their length about an inch. Bra&eas lanceo- late. Calyx very briflly. Perhaps the union of the tenth Hamen to the reft, which is not in the ufual mode continued quite to the bafe, even in T. virgtniana, may exift lefs, or not at all, in the fpecies before us, and yet the plants may together conftitute one natural genus. TEPID, in Natural Hiflory, a term ufed by writers on mineral waters, to exprefs fuch of them as have a lefs fen- fible cold than common water. They diftinguifli all the medicinal fprings into three kinds ; the hot, the tepid, and the cold : but the middle term might eafily be mifunderllood to mean a great deal more than they exprefs by it : all that have what can be called the leaft fci.fible warmth, are called hot; and the tepid are diftinguifhed from the abfolutely cold, only by their being lefs cold. Some of this clafs of mineral waters, and fome few alfo of the cold ones, have a (harpifti vinous tafte, which is never obferved in any of the hot ones. This tafte is loft on giving the waters the flighteft heat, and is therefore very difficult to be guelTed at as to its origin. It is not only found in the aluminous and vitriolate waters, but alfo in thofe whicli are manifcftly nitrous, and which abound in fulphureous falts, quite different in their nature from acids. It is therefore an additional fomewhat, quite diftinft from the faline properties of the fluid, and as eafily connefted with one kind of that as with the others. The caufe of heat in the mineral waters remains yet wholly unknown, notwithftandiiig all that has been written concerning it. It is hard to believe, that there are con- tinual fubterranean fires near enough the furface, to give a heat that preferves itfelf in fo great a degree to the very place of their eruptions ; and it is equally hai-d to conceive, that there can be beds of fermenting mineral matters, fuffi- cient in quantity and force to have given the fame degree of heat to waters for fo many ages, as fome of our hot fprings are known to have fubfitted. Duclos's Exam, des Eaux Miner. TEPIDARIUM, among the Romans, a tepid or blood-warm bath, which was joined to the cold and hot baths, and was a medium between the two ; fo that if any perfon wanted to go from the hot to the cold bath, or vice verfd, he always took the tepid bath in his way. TEPIQUE, in Geography, a town of Mexico, in the province of Xalifco ; 5 miles N. of Xalifco. TEPIRU, a town of South America, in the province of Tucuman ; 18 miles N.W. of St. Yago del Eftero. TEPKAS, a Ruffian fettlement in North America, on the eaft fide of Beering's ftrait. N. lat. 66°. E. long. 112° 4'. TEPLITZ, a town of Bohemia, in the circle of Leit- meritz, celebrated for its warm baths, difcovered in 762 ; 14 miles W.N.W. of Leitmeritz. — Alfo, a town of Croatia ; 8 miles S. of Varafdin. TEPLOW, Gregory Nicolaicuitsch, in Biography, a Ruffian writer, educated in a feminary at Novogorod, where he diftinguifhed himfelf by a Latin tranflation of prince Cantemir's Satires, and a work on the geography of Ruffia, neither of which was ever printed. In 1740 he was employed in the Academy of Sciences, and in forming a catalogue of objefts contained in the Cabinet of Natural Hiftory. He thus acquired a tafte for that fcience, and particularly for botany ; in confequence of wliich he was made an adjunft of the Society in 1741, and in the follow- ing year delivered leftures on moral philofophy, that were much approved. The emprefs Elizabeth appointed him tutor and travelling companion to her favourite, count Rafumoufky, who, on his return from his travels in 1 746, was made prefident of the Academy of Sciences. Teplow then became an honorary member, direfted the inftitution in the name of the prefident, and drew up rules for its better regulation. At the time of 'the emprefs's death he was a counfellor of ftate ; but as he was an enemy to Peter III., he was arrefted : afterwards he was rcftored to favour ; never- thelefs, two months after bis being made a member of the council of ftate, it was difcovered that he had joined in a confpiracy to dethrone that unfortunate prince. After the depofition of Peter, he publifhed manifeilations, in order to render him odious, and, as Bufching fays, was the principal agent in putting him to deatli. For this fervice he is faid to have received a reward of 20,coo rubles. The emprefs afterwards made him a privy-counfellor and member of the fenate, and honoiu-ed him with the orders of Alexander Newfliy and St. Ann. He died in March 177';; and his works, in the Ruffian language, are, " A General View of Philofophy ;" " Liftruftions to his Son ;" " A CoUeaion of Songs, with Melodies for three Voices ;" " Inftruftions for T E II T E R for the Cultivation of foreign Tobacco, in Lcifer RuJTia," diftributcd by order of the emprefs through that province, in 1763. Gen. Biog. TEPOTI, in Geography, a river of Paraguay, which runs into the Paraguay. TEPPELWODA. See Toppliswoda. TEPTERE, a name originally Tartarian, and fignify- ing a man who cannot pay his taxes, given by the RulTiaiis to a peculiar tribe formed of Finns and Tartars in the middle of the l6th century, during the dilTolution of the Kliazan-Tartarian empire. They eftablifhed thenifelves at firft in that part of the Ural mountains, which belongs to the government of Ufa. At prefenLthey are fo much intermingled, that their origin is fcarcely difcernible. They are found to incrcafe in number at every fucceeding cenfus. In the year 1762, about 34,000 of them paid the impofts. TEPTON, in Geography, a town of Thibet ; 30 miles N.W. of Sgigatchee. TEPWIA, a town on the W. coaft of the ifland of Celebes. S. lat. 1=4'. E. long. 119° 10'. TEQUENDAMA, a cataradt near Bogota, the capital of New Granada (fee Bocsota), which, according to Bou- guer, is one of the higheft in the world, being 200 or 300 fathoms in height, and its fall vertical. Its real height is probably about 1320 feet. The river Funza, which is here very confiderable, pafTes along a narrow channel, on a high table land, and is poured as from the fpout of a vafe, in one arch of the enormous height above fpccified, the noife being hoard at the diftance of feven leagues. This fall is received in a vatt cauldron of more than a league in circumference ; and the quantity of water, and violence of its defcent, form a continual mafs of clouds, which ren- ders it fcarcely vifible in the evening ; but in the morning it is more ftriking, being decorated with numerous rainbows according to the pofition of the fpeftator. The vafl rocks which form the cauldron alfo excite admiration, being as regular and polifhcd as if cut with a chiflel : the furround- ing heights are covered with trees, Oirubs, and flowery plants, while the fplendid appearance of fome of the birds, and the mufic of others, render the cataradl of Tequen- dama alike fublime and beautiful. TEQUEPA, a town of Mexico, in the province of Mechoacan, on a river near the Pacific ocean ; 80 miles S.E. of Zacatula. N. lat. 17° 50'. W. long. 102° 26'. TEQUERY Bay, a bay on the louth-eaft coaft of Cuba, near Cape Cruz. TEQUIA, a town of New Grenada; 32 miles S.W. of Pamplona. TEQUIXQUIACATZANATL, in Ornithology. See Gracula Qu'ifcala. TER, in Geography, a river of Spain, which rifes in the county of Cerdagne, and runs into the Mediterranean, about 30 miles E. of Gcrona. TERA, a fmall river of Spain, which runs into the Orbega, in the province of Leon. TERACE, in Rural Economy, a term provincially ap- plied to a coarfe hair fieve, for feparating the inferior flour from the bran. TERAIN, in Geography, a river of France, which runs into the Oife, near Creil. TERAKACO, a peninfula on tlie eaft coaft of New Zealand, of which Cape Table forms the euftern point. TERAMNUS, in Botany, fo called by Browne, appa- rently in aU>ifion to its delicately-fliaped legume, vr^xfivoTUi being ufed particularly to exijrefs the tendernefs of eatable pulfe : aif^aixvof was a weed hollile to leguminous plants. — Browne Jam. 290. Swartz Prodr. 105. Ind. Occ. 1238. I. 25. Schreb. 489. Willd. Sp. PI. v. 3 971. Mart. Mill. Ditt. V. 4. — Clafs and order, Diadelphia Decaiidria. Nat. Ord. Papilionacea, Linn. I.egum'mofa, Juff. Gen. Ch. Cat. Perianth inferior, of one leaf, two- lipped, permanent ; its upper lip ratht-r the Urgell, divided ; lower three-cleft ; all the teeth acute, erecl, converging. Cor. papilionaceous. Standard inverfely lieart-fhapcd, fpreading, fomewhat deflexed. Wings nearly as long, ereft, approximated, rounded at the extremity. Keel very fmall, concealed in tlie calyx between the bafes of the wings, and covering the ftamens, feparabie into two petals. Slam. Filaments ten, all united iu their lower part into one fet ; only live of them perfetl, the live intermediate ones being minute, without anthers, and fliorter ; anthers five, roundilh. Pijl. Gcrmcn cylindrical, flender, downy ; ftyle none ; ftigma capitate, roundifli. Peru. Legume linear, bordered, comprcfled, with ninnerous conftridlions. Seeds feveral, roundilh, comprelTed, abrupt at the fummit. Eft. Ch. Keel minute, concealed in the calyx. StamcHk all connefted ; the i-wi alternate ones without anthers. Stigma feftile, capitate. Calyx two-lipped. Legume li- near, with many feeds. 1. T. voluLUis. Smaller Teramnus. Swartx Ind. Occ. 1 24 1, t. 25. Willd. n. I, excluding all the fynonyms. — Leaflets ovato-lanccolate, downy beneath. — Native of rather moift bufliy alpine places, in the fouthern part of Jamaica. The^^fm is herbaceous, or flightly woody at the bafe only, from two to four feet high, twining, (lender, triangular, downy, fimple or divided. Leaves alternate, diftant, ftalked, each of three leajlets, moftly obtufe with a fmall point, entire, ribbed and veiny, fmooth and bright-green above ; downy beneath ; fometimes accompanied by a pair of fmaller ones at the bafe. Their common y"o&//?aW is about an inch long, channelled, downy, with a pair of minute Ime-Ai- Jlipulas at the bafe. Chijlers axillary, (lender, fimple, longer than the leaves, of feveral fmall reddi(h-blue_/7(/':ffrj, in diftant couples, on (hort partial ftalks. Legume an inch long, flender, hairy, its point finally hooked ; the valves fpiral after burfting. , 2. T. uiic'watus. Great Hooked Teramnus. Swartz Ind. Occ. 1239. Willd. n. 2. (T. n. 1 ; Browne Jam, 290. Dolichtos uncinatus ; Linn. Sp. PI. 1019. Plia- feolus hirfutus, fihquis reftis et aduncis ; Plum. Ic. 215. t. 221. Ph. fylveftris minor, flore minimo, fihquis longis teretibus alba lanugine hirfutis ; Sloane Jam. v. i. 182.) — Leaflets oblong ; (ilky bene.ith ; hairy above. — Native of dry bulhy places, in various parts of Jamaica. The root is long and flender. Stem herbaceous, fubdivided, twining, flender, triangular, its angles hairy and fomewhat bordered ; the bafe woody. Leajlets one and a half or two inches long ; their common Jlalk an inch, or inch and a half. Stipulas fmall, downy, deciduous. Clujlers axillary, ftalked, often a fpan long, twice the lengtli of the leaves, many- flowered. Floiuers in diftant pairs, fmall, reddifli. Le- gume two inches long, ftraight, narrow, comprelTed, hairy, ending in a bluntifli liookcd point. TERAMO, in Geography, a town of Naples, in Abruzzo Ultra ; the fee of a bifliop, immediately under the pope ; 22 miles N.N.E. of Aquila. N. lat. 42° 37'. E. long. 13° 49'- TERANE', a town of Egypt, on the weft branch of the Nile ; 18 miles N.W. of Cairo. N. lat. 30° 30'. E. long. 30"' 45'. TERANO, a town of Naples, in Calabria Citra ; 3 miles W. of Bifignano. TERASA RSUK, a town of Eaft Greenland. N. lat. 59^55'. W.long.43^ ^^^^3^ T E R TERASPURG, a town of Airllm; 2 miles N. of Egenbur^. ,, , TERATOSCOPIA, formed of T^faf, prodigy, ajid in T E R Babylonia, on an ifland which was formed by the Tigris ac its mouth. (Ptol.) Dionyfius Periegetes places the town of Teredon at the mouth of the Euphrates. TEREK, in Geography, a mountain of Alia, between Great and Little Bucharia. Tkrek, one of the rivers that fall into the Cafpian fea- It originates in the Caucaiian mountains, runs at firll to- wards the W. and S., but turns afterwards entirely to the E. and in about N. lat. 44°, and E. long. 65°, difcharges itfelf into the Cafpian. It takes up in its courfe the Bakfan, the Malka, and the Soonflia, among many other mountain- brooks and rivers. Its fource lies properly in the Snow- mountains of Caucafus, on the higheft partition-ridges of the frontiers of Georgia. It is rapid in its courfe ; and, in the months of July and Auguft, when the fnow melts, fwells to the height of eight or ten feet above its ufual level in autumn, winter, and fpring ; overflowing its banks, and inundating the adjacent cojintry, forming for itfelf new beds, and choaking the old with fand. In its lower courfe,, as far as Kitzliar, it is almofl; entirely unaccompanied by woods ; farther up, to Starogladka, by a few ; and thence upwards, its banks are richly garnifhed with forells, parti- cularly of oaks, wild fruit-trees, and a variety of others. It does not freeze over every year, though in winter it abounds with driving ice. In this feafon its water is tole- rably clear, which at other times, above Kitzliar, is turbid, with earthy particles ; but when taken up, it foon becomes- clear, and is then bright, well-taft^ed, and of good quality. Below Kitzliar, the river has a lefs fall, and ieparates into feveral arms, in which the parted ftream flows fo gently, that it has time to depofit its earthy particles, which alter- nately fill up thefe arms ; fo that one or the other occa- fionally reprefents the main river. In the lower regions, on, the fliores of the Terek, are feen vineyards, mulberry and other fruit-trees, to which fucceed fait -lakes, and fprings of the fame nature. Its bed is formed moftly of fand and clay. With regard to fifli, the Terek, as well as all its collateral rivers, is poor. Yet there are caught in it ft:ur- geon (acipenfer fturio), beluga (acipenfer hufo), ferruga (acipenfer ftellatus. Pall.), plenty of falmon, fat-fifh (cy- prinus chalcoides), carp, barbel (cyprinus barbus), fllad> pike, fudak (lucio perca), perch (perca fluviatilis), lefchtfe (cyprinus barba, ) otters, beavers, tortoifes, &c. Terek, in Ornithology. See Scolopax Cinerea. TERELLA, in Geography, a town of Naples, in the Mohfe ; 4 miles N. of MoUfe. TERENCE, PuBLlus Terentihs, in Biography, a Latin writer of comedies, was born, as it is fuppofed, at Carthage about the year pf Rome 560 (B.C. 194.) Being brought to Rome as a flave, when young, he was in the fervice of a perfon named Terentius, a fenator, from whom he derived his name- The purity and politenefs of his lan- guage evince his having enjoyed the benefit of a good- Roman education. After his emancipation, he was ho- noured with the friendftiip of feveral Romans of rank, fuck as Scipio Africanus the younger, and the younger Lelius- His comedies were founded upon the Greek model, and tranflated, either wholly or in part, from the Greek. The firft comedy which he is faid to have brought upon the ftage,. was the- " Andrio," reprefented in the year B.C. 166- But though this was the firft of his comedies that was afted,. it appears that it was not the firft which he had written- The fix comedies of Terence that are ftill extant were ex- hibited at Rome from the year B.C. 166 to 160. They were heard with great applaufe ; the " Eunuchus" was repeated twice in the fame day, and he is faid to have received for it 8000 fefterces (about 64/.) Scipio and Lclius» T E R T E 11 Lelius, as tradition reports, had a great part in tlie com- pofition of Terence's comedies. Terence himfelf in a prologue fecms tacitly to acknowledge the faft. But modern writers and critics, who have rcafoncd on this faft, think it very improbable. Generals and ftatelmen were not perfons likely to poffefs the habit of dramatic com- pofition, whatever previous hints or fubfequcnt correftions they might furniil\ ; and befides it is obfervcd, that no writings more ftrongly indicate by their ftyle and manner that they are the produftion of a fingle hand than thofe of Terence. After he had prefented thefe comedies to the public he departed for Greece, and never returned to Rome. Some liave accounted for this circiunllance, by fuppofing that he periilied by Hiipwreck ; others affirm that he died in Greece, from the grief he experienced on account -of tlie lofs of his baggage and feme new comedies, which he had compofed, by an accident at fea. The judgment of critics on the performances of Terence lias been very different though their real merit is faid not to be of difficult eitimation. It is generally allowed that he is defeftive in invention and originality of obfcrvalion. This •fufficiently appears from his having Greek manners and charafters in all his plays. He was likewile a plagiarill, with regard to the fentiments, as well as to the plots and incidents of his pieces ; but a very competent Judge ob- serves, " that he is juftly entitled to the praife of judicious feleftion, happy difpofition, and purity and neatuefs of language ; and that, as a Latin writer, in a flyle of elegance of which there are fo few examples, he was highly prized in his own times, and is invaluable in ours. Cicero, who fpeaks of him as a tranflator of Menander, applauds him as the only one who had exprefTed in the Latin language all the politenefs and amenity of the original ; and Caelar, in fome well-known lines, calls him ' the lover of pure diftion ;' and alfo by the epithet of the halved Menander ; and his regret that Terence did not poffefs the vis comlca, as well as the other excellencies of his model, points out his ■deficiencies." Of the numerous editions of Terence, the moft efleemed are the following; •viz. the " Variorum," Amft. and Lugd. fiatav. 1686; " Bentleii," Cantab. 4to. 1726; " Wefterhovii," Hag. C. 4to. 1726; " Zeunii," Lipf. 8vo. 1774; '" Brunckii," Bafd, 410. 1779. Voff. Poet. Lat. Gen. Biog. TERENJABIN, in the Materia Medica of the Ancient Arabians, a word ufed to exprefs a kind of manna called by fome manna majlichina, from its round globules refembling the drops of maftich, and by the phyficians of many parts of the world at prefent. Manna Perficum; wliich fee. See farther about this drug in Philof. Tranf. N" 472. vol. xliii. p. 87. TERES LiGAMENTUM, in Anatomy, one of the liga- ments of the hip-joint. See Extremities. Teres Ligamentum Uteri. See Generation. Teres Major and Minor, two mufcles of the fhoulder, fo called, becaufe their figure is fomewhat rounded. The teres major (fcapulo-humerien, le grand rond) is elongated and flattened, placed at the lower and back part of the fhoulder, and extending from the inferior angle of the fcapula to the pofterior edge of the bicipital groove of the humerus. The latiffimus dorfi, the flcin, and the long head of the triceps, cover it behind ; in front, it is covered by the latiflimus, the axillary veffels and plexus of nerves, the fhort head of the biceps, and the coraco-brachialis. Its upper edge correfponds firfl to the teres minor, then is feparated from that mufcle by the long head of the triceps, and laflly correfponds to the fubfcapularis, fi-om which the circumflex vefTel and nerve feparatc it. The lower edge, covered by tlic fl/»(■-««/, in Surgery, a large painful tumour, or puftule on the fkin, thought to refemble a pine-nut. TERMINUM, ad qui praieriii. See Ad Terminum. Terminum, Infra, quare ejecit. See QuARE. TERMINUS, t'ijjLc, fignifies a bound or limit. Terminus, a quo, in Metaphyftcs, denotes the place from whence any motion commences : in contradiilinftion from the other extreme, which is called the terminus ad quern. The fchoolmen call privation a terminus a quo, in fpeak- ing of generation, which they confider as a fpecies of motion. Terminus, in Mythology, the god of fields and land- marks. M. de Boze, in a learned differtation on this fub- jeft (Mem. de I'Acad. t. i.), obferves, that the Egyptians received from the Hebrews the cuftom of bounding the fields. In procefs of time, as the laws eftabhfhed for the fecurity of the land-marks were not a fufficient reftraint on avarice, Numa perfuaded the people that there was a god who pro- teftcd land-marks and avenged incroacliments. He built a temple to him upon the Tarpeian mount, and regulated the ceremonies of his worfhip. He caufed this god to be repre- fented under the form of a ftock or ftone, as we learn from Tibullus and Ovid : but afterwards this god was reprefented with a human body placed upon a, pyramidical land-mark. It is faid that this god acquired peculiar honour by main- taining his ftation when the olher gods were removed by Tarquin the Proud, for the purpofe of building the temple which Tarquin the elder had vowed to ereft to Jupiter. TERMIOVA, in Geography, a town of Iftria ; 18 miles N.E. of Pedena. TERMISSUS, or Telmissus, in Ancient Geography, a town of Afia, in the fouthern part of Pifidia. TERMITES, \n Entomology. See Termes. TERMOLI, or Termini, in Geography, a town of Na- ples, in the province of Capitanata ; the fee of a bifhop, fuffragan of Benevento ; 57 miles W. of Viefte. N. lat. 42° 2'. E. long. 15° 5'. • TERMOR, Tenens ex termino, in Lain, he that holds lands or tenem.ents for a term of years, or life. TERMUS, in Ancient Geography, a river in the ifle of Sardinia. TERN, in Geography, a river of England, which rifes in Staffordfhire, 5 miles N.E. of Drayton, and runs into the Severn, 7 miles below Shrewfbury. Tern. See Tyran. Tern, in Ornithology. See Sterna. Tern, Brown, or Sterna ohfcura of Linnajus, is by fome authors called the irozvn gull. Mr. Ray defcribes it as having the whole under fide white, the upper brown ; the wings partly brown, partly afh-colour ; the head black ; and the tail not forked : but Mr. Pennant conjeftures, that this bird is the young of the greater tern. See Sterna. Tern, Great, or Sea-ftuallow, Sterna hirundo of Linnasus, has the bill and feet of a fine crimfon, the former tipt with black, ftraight, (lender, and iliarp-pointed ; the crowTi and hind part of the head black ; the throat and whole under fide of the body white ; the upper part, and coverts of the wings, a pale grey ; the tail confifting of twelve feathers, the outer edges of the three outmoft grey, the reft white, and the T E II T E R the exterior on each fide two inches Uxigcr than the other, and c'.ofed in flying, fo as to appear one (lender feather. Thefe birds frequeiit the fea-fliores, banks of lakes, and rivers ; they feed on fmall fifli and water infecls, hovering over the Wattr, and fuddenly darting into it to catch tiieir prey. They breed among fmall tnfts of rufhes, and lay three or four eggs of a dull olive-colour, fpotted with black. All the birds of this genus are very clamorous. Pennant. Tern, Black, or Scare-croiu. See SteiiNA Filipes. Teun, Surinam, cr Darter. See Plotus Surinamcnjis. TERNA, a word ufed by fome authors to exprefs an impetigo. Terna, Folia, in Botany and Vegdable Phyjiology, are leaves, whether fimple or compound, feffile or ftalked, which grow three together in a whorl, on any Hem or branch, as in Verbena triphylla. Curt. Mag. t. 367. Such a difpoh- tion of the foliage appears to prevail remarkably among the plants of Mexico, Chili, and Peru, of which, befides the example jull named, many others may be found. (Seethe genera Fuchsia and Hemimeris. ) Among Britilh plants, Erica cinerea has naturally ^o/ia tcrna ; while the generally op- pofite leaves of Lyfunachia 'vulgaris and Lythrum Salicaria occafionally become fo. See Leaf. TERNALLA, in. Geography, a town of Hindoollan, in Myfore ; 45 miles E. of Rettinghery. TERNARY Measure. See Measure. Ternary Numler, in Antiquity, was efteemed a fymbol of perfeftion, and held in great veneration among the an- cient mythologifts. Whence Virgil, " Numero Deus impare.gaudet." Eel. yiii. ver. 75. Servius on this place remarks, that the Pythagoreans afcribed the ternary number to the Supreme God, as being the beginning, middle, and the end of all things. All the heathen gods had a three-fold power attributed to them, as the tria -virginis ora Diana, the three-forked thunderbolt of Jupiter, the trident of Neptune, the three-headed dog of Pluto. Again, the Parcx were three, the Furies three, Hercules was three nights in begetting, the Mufes were an- ciently three, the Graces three, &c. This number was likewife ufed in moft rehgious ceremo- nies, but efpecially in luftrations ; whence Virgil, jEn. Irb. xi. V. 188. " Ter circum accenfos, cinfti lulgentibus armis, Decurrere rogos." TERNATA, Folia, in Botany and Vegetable Phyfiology, are compound leaves, each of wliich confiils of three leaf- lets, as in the Trefoil and Strawberry. Thefe are called in Enghlh Ternate Leaves, and mud not be confounded with Folia Terna, fee that article, for which laft we have no ap- propriate term in our language. Some plants bear twice, or thrice, ternate leaves. See Leaf. TERNATE, in Geography, an ifiand in the Eaft In- dian fea, and the principal, though not the largeft, ajnong thofe called Moluccas or Spice Iflands, of a circular form, and about 21 miles in circumference. In the centre is a lofty volcanic mountain, whofe bafe extends almoft to the fea every way. The upper parts are uncultivated, and co- vered over with Ihrubs and low trees ; but in the plain are many gardens, and abundance of fruit-trees. On this moun- tain are found many hollows or caverns full of fulphur, which emit a thick fmoke, and flame fometimes appears from the fummit, with a noife refembling thunder. The produftions are cocoa-nuts, bananas, yams, oranges, and other fruits ; but the principal article of commerce is cloves : many birds of paradife, and other beautiful birds, are found here, and plenty of game. The chief quadrupeds are goats, deer, and hogs. The boa ferpent is fometimes found of the length of thirty feet. This ifland was firll fettled by tlic Spaniards, who were driven away by the Dutch, to whom the king of the ifland is, in fome degree, iubjedl. The Europeans have two forts, called " Orange" and " Ter- loehe," between which is a lake, called " Safle," three miU'S in circumference, and 60 fathoms deep, feparated from the fea by a narrow dike, which the Spaniards made a fruitlefs attempt to cut through, to form a port. On this ifland arc three mofques, and a Dutch church, but no place of wor- fliip for the Portuguele. The province or government of Ternate includes the iflands of Ternate, Tidore, Motir, Machian, and Bachian, which are what are properly the Moluccas ; they are the original places of growth of the finer fpices ; and larger nutmegs are dill found in the woods of Ternate, than any other produced out of Banda. Some places, fituated in the eaftern part of the ifland of Celebes, belong likewife to this government ; and the objeft of the Company in fettling there is principally to furnifli provifione tor Ternate, that part of Celebes being very fruitful in rice and other necelfaries. They alfo yield ? confiderable quan- tity of gold, about 24,000 taels, of a dollar and a half in weight, yearly, amounting, at ^L per tael, to 120,000/., and efculent bird's-nells, which are efteemed a great delicacy by the Orientals, and efpecially by the Chinefe ; in exchange for which the inhabitants take opium, Hindooftan piece- goods, chiefly blue cloth, fine Bengal coiTacs and hummums, together with fome cutlery. Ternate does not, in general, require any fupply of provifions from Java, as the ifles of Banda do. This ifland fufured greatly in Auguft 1 770, by earthquakes. More than fixty violent fliocks were felt in the fpace of twenty-four hours, and the fortifications were much injured. N. hit. 0° jo'. E. long. 127° 10'. TernaT£, in Zoology, a fpecies of bat. See Vampvri;, and Vespertilio Vampyrus. TERNATE A, in Botany, a genus fo named by Tourne- fort, from Ternate, the native country of the plant. See Clitoria. TERNAVASSO, in Geography, a town of France, in the department of the Po ; 6 miles N.E. of Carmagnola. TERNAY, Bay of, a bay or harbour on the E. coaft of Chinefe Tartary, fo called by M. Peroufe in 1787. The Dutch navigators called it Port Acqueis. N. lat. 45° 13'. E. long. 137^29'. TERNBERG, a mountain of Auftria, near the river Enns ; 6 mites S. of Steyr. TERNEUSE, a town and fortrefs of Flanders, fituated on the W. branch of the Schcld, tailed the " Hondt," be- gun by the count of Hohenloe, lieutenant of the prince of Orange, in the year 1583, afterwards augmented by the States : the fortifications have been fince jieftroyed ; 1 2 miles S.E. of Fluihing. TERNI, a town of the Popedom, in the duchy of Spo- leto, fituated between two arms of the Nera, and, therefore, anciently called " Interamnium," or " Interanina." It is well built, and the fee of a bilhop, immediately fubjeft to the pope. Its greatefl: trade confifts in oil, befides which it alfo reaps confiderable advantage from its exceUent vine- yards. This was the birth-place of the emperors Tacitus and Florianus, and of Tacitus the famous hiftorian. Be- tween fix and feven Itahan miles frcmi Terni, to the N.W. clofe by the httle town of Cefi, is Mount Eolo, remarkable for its cool breezes, which, efpecially in fummer, ifl'ue from, the chafms and crevices in the rocks of this mountain ; 14 miles S.S.W. of Spoleto. N. lat. 2° 34'. E. long. 12° 37'. 3 A 2 TERNIER, r E R TERNIER, a town of France, in the department of the Leman ; c miles S.S.W. of Geneva. TERNOIS, Le, a river of France, which runs mto the Caiich'.-, near Hefdin. ^ • . r TERNOSKAIA, a town of Ruma, m the comitry ot the Codacs, on the Don ; .36 miles' E.N.E. of Azoph. TERNOVA, n town ot European lurkey, m iiul- earia. This town was anciently one of the rtrongeft in the country, and the reiidence of the princes; at prcfent it is thinly inhabited, and the fortifications are rmned. It is the refidcnce of an ecclcfiaftic, wiio is called the archbifhop ot Bulgaria ; 95 miles E. of Sophia. N. lat. 43". E. long. nr^ ■..'.— Alio, a town of European Turkey, in Tliellaly ; hrgc and commercial ; on the Peneus ; 5 miles W.N.W. of LarifTa. TERNSTROEMIA, in Botnuy, was fo called by l.in- ■naius at the fugg-lUon of Mutis, in memory of one of the pupils of the foi-mer, named Ternftroem, who having under- taken a voyage to China, in 1745, died at Poulicandor, at an early age. His illuftrious teacher has not, as in other inftances, given us any account of the voyage, difcoveries, or talents of this unfortunate young man, who, though not one of his favourite pupils, deferves commemoration as a martyr to fcicntific refearch — Linn. Suppl. 39. Schreb. 347. Willd. Sp. PI. v. 2. 1 128. Mart. Mill. Did. v. 4. "Sw'artz Prodr. 81. Jufl". 262. (Cleyera ; Thunb. Jap. 12. Nov. Gen. 68. .Tuff. 433. Taonabo ; Aubl. Guian. 569. Tonabea ; Jufl". 262. Tanabea ; Lamarck lUuftr. t. 456.) Clafs and order, Polyandria Monogyma. Nat. Ord. akin to Thea and CanuHia. JufT. Gen. Ch. Cal. Perianth inferior, of one leaf, in five deep, orbicular, concave, rather unequal fegments, with two fmaller ones clofely apphed to its bafe, all permanent and coriaceous. C';r. of one petal, bell-fliaped, in five deep, orbicular, concave, emarginate fegments, longer than the calyx, without any tube. Stam. Filaments numerous, avvl- Ihaped, fliorter thr.i the corolla, and inferted into its bafe in a double row ; anthers linear, ereft, the length of the filaments. Pijl Germen fuperior, roundilfi ; ftyle cylin- drical, as long as the llamens ; lligma capitate. Perk. Berry dry, ovate, fmooth, of two cells. Seeds about eight, convex on one fide, flat on the other. Efl". Ch. Corolla bell-fhaped, in five deep fegments, without a tube. Calyx in five deep fegments, with two fmaller at the bafe. Berry dry, of two cells. I. T. meridionaiis . Mexican Ternftroemia. Linn. Suppl. 264. Willd. n. I Leaves obovate, obtufe, emarginate, entire. Flower-ftalks axillary, compreffed, recurved. Two outer fegments of the calyx orbicular, fharply keeled. — Gathered by Mutis in Mexico and New Granada. A tree, determinately branched ; the branches thick, rigid, leafy, nearly round, with a fmooth grey bark. Leaves alternate, an inch or rather more in length, on fhort, thick, chan- nelled, purplifh footftalks, obovate, or nearly elliptical, pe- culiarly rigid and coriaceous, fingle-ribbed, fmooth, with a thick fomewhat revolute margin ; their upper furface often dotted with either prominent or deprefTed points ; the under purphfli or rufty, efpecially when young. Stipuhis none. Floiver-Jlalks numerous, axillary, folitary, half the length of the leaves, very thick and rigid, two-edged, brown or purple, curved downwards, deftitute of pubefcence, but, in the dried plant at lead, wrinkled and uneven. Flotvers larger than a hawthorn-bloffum, white. The two fmaller external fcales of the calyx furnifhed with a fharp keel, end- ing in a minute point ; the reft without any keel, thin and membranous at the edge ; all fmooth, orbicular, coriaceous, permanent. Corolla occafionally with fix fegments, at firil T E R globole, then bcU-ftiaped. Berry dry, deftitute of valves. Seeds filky, deep red. Such is the plant of Mutis. Wc have no means of afcertaining whether the Welt Indian one, dcfcribcd by Swartz in his Obfervationes, be the fame or not ; but he fays thefoivcr-Jalks arc terminal, nor does he advert to their clumfy two-edged figure, fo different from the reft of the fpccies, that it could fcarcely have efcaped his notice. 2. T. ellipt'tca. Elliptical Ternftroemia, or Rottenbane. Swartz Ind. Occ. 939. Willd. n. 2. Vaiil Symb. v. 2. (>i. — Leaves obovate, obtufe, entire. Flower-ftalks lateral, elongated, nearly thread-fliaped. Outer fegments of the calyx ovate, acute, bluntly keeled. — Native of the Weft Indies, on the Sulphur mountains of Montferrat and Guade- loupe, as well as in St. Vincent's. It is faid to be the pre- tended Jefuit's bark, mentioned by Labat. This is Tijljyub with ftout, round, fmooth, difperfed or cluftered branches, leafy towards their extremities. Leaves like the laft, but twice as long, and not emarginate ; their fnotjlalks longer and more flender. Flower-Jlalks an inch and half or two inches long, but flightly drooping or recurved, nearly round, not a quarter fo ftout as the laft, (lightly fwelling upward, red or purplilh. Floiuers rather larger than the foregoing, yellowifh-white, fome of them deftitute of a piftil. The fcales of the calyx are all pointed, the outer ones narrow and ovate, of a fmaller proportion than in T. meridionaiis, and fometimes more than two. 3. T. japonica. Japan Ternftroemia. Thunb. Tr. of Linn. Soc. v. 2. 335. Willd. n. 4. (Cleyera japonica ; Thunb. Jap. 234. Mokokf; Kxmpf. Am. Exot. 873. t. 774. ) — Leaves obovato-lanceolate, obtufe, nearly entire. Flower-ftalks lateral, fomewhat angular. Outer fegments of the calyx triangular, pointed, (lightly keeled. — Gathered by Thunberg, near Nagafaki m Japan, flowering in autumn. This is a trci', fmooth in every part. Specimens lent us by the finder are fo very nearly akin to the two foregoing fpccies, th.1t it is hard to eftablifh a fpecific dilference be- tween them. The leaves of the Japan plant however are rather more lanceolate, and their margin is fometimes, not conftantly, crenate towards the point. Their furface is quite fmooth, not vifibly dotted. T\\e Jlowerjlalks, about an inch long, are fcattered on the branches, below the leaves, but (lightly recurved, ufually triangular, not comprefTed, Flowers white, (carcely fo large as in T. meridionaiis. Style: fliort and thick. Berry the fize of a currant, red, pointed, with a white, fweet, fubaftringent pulp, and, according to KiEmpfer, only one pellucidyif^. 4. T. pimBata. Dotted-edged Ternftroemia. Svrartz Prodr. 81. Willd. n. 3. (Taonabo punctata ; Aubl. Guian. 571. t. 228.) — Leaves elliptic -oblong, dotted at the edge. Flower-ftalks axillary, elongated, nearly thread- (baped. Segments of the calyx all pointed. — Gathered by Aublet on the fides of the Serpent mountain in Guiana, bearing flowers and fruit in Auguft and September. A large tree, whofe leaves are bordered with minute glandular points, rough to the touch ; their extremity ulually emar- ginate ; their length about three inches. Floiuer-jlalhs (len- der, about half as long as the leaf with its footftalk. Sta- mens about fixty. Fruit ovate, pointed, of five or fix cells. Aublet having feen it in an unripe ftate only, took it for a capfule, but Swartz aiferts it to be a berry. ^.T.dcntata. Toothed Ternftroemia. Swartz Prodr. 81. Willd. n. 5. (Taonabo dentata ; Aubl. Guian. 569. t. 227.) — Leaves elliptical, pointed, ftrongly ierrated. Flower- ftalks lateral or axillai-y, fingle-flowered Gathered by Aublet, in the fame place as the preceding, and at the fame feafon. A tree, whofe trunk is twenty-five feet, or more, in T E R MI heiglit, and two in diameter, crowned with an ample tuft of fpreading brandies. Tlie Icnvfs are four iiiehes long, and an inch and lialf or two inches broad, thick, fmooth, tapering at each end, befet with tooth-hke f rratures in the margin. Footjlalks llender, an incii long. Floivcr-JlalLs re- curved, fcatti red, hardly an inch in length. Fluivers yel- lowifh, ill'" fize of hawthorn. Fruit like the lall. The lark of the tree is ufed for tanning leather. The tuood ferves inftead of tiles for houfes. 6. T ? corymhofa. Corymbofe Ternllroemia : — Leaves op- pofite, elliptical, pointed, entire. Panicle forked, corym- bofe, many-flowered, terminal. — Native of Guiana. Mr. Rudge. This appears to be moft akin to the laft in the fhape and fize of its leaves, but differs in their entire margin, and oppofite infertion. The three-forked ^(jn/V/f is, more- over, a kind of inflorefcence unexampled in Ternjlroemia, and the calyx wants the two fmall external fegments. All thefe circumilances induce a fufpicion of the genus, whicii ive have not materials to clear up. We cannot take leave of Ternjlronma without adverting to the mifchiefs which arile from the barbarous and iinfettled principles of French nomenclature. .TufTicu profefles to adopt the uncouth names of Aublet, only til! the genera of that author are better fettled ; yet he has tried to foften down Taonabo into Tonahea, a needlefs change if the name were not to remain. Lamarck prefers Tanabea; fo our memories and our indexes would have become burthened with three names inftead of one, all intolerable to a clafTical or literary botanift, if the genus had not happily been fuper- feded. TEROE, in Geography, a town of Bengal ; 25 miles E. of Ramgur. TEROUANNE. See Tjterouanne. TEROWA, a town of the ifland of Junkfeilon, near the eaft coaft ; the ulual reiidence of a Siamefe governor or viceroy. Here is a pagoda, with about twenty priefts. N. lat. 8° 13'. TERPANDER, in Biography, and Muftc of the Jncinits, one of the moft renowned muficians of antiquity. It is re- corded in the Oxford M;u"bles, that he was the inventor of charafters to exprefs mufical founds in the feveral genera ; ■which event is placed about fix hundred and feventy years before the Chriftian era. Indeed all writers who mention the progreffive ftate of mufic in Greece, are unanimous in celebrating the talents of Terpander ; but though there is fuch an entire agreement among them concerning the obli- gations which the art was under to this mufician in its infant ftate, yet it is difficult to find any two accounts of him which accord in adjufting the time and place of his birth. It does not, however, feem neceflary to lead the reader over hedge and ditch with chronologers, after a truth, of which the fcent has fo long been loft. The Oxford Marbles, which appear to us the beft authority to follow, tell us, in exprefs terms, that he was the fon of Der- deneus of Left>os, and that he flouriftied in the 381ft year of thefe records; which nearly anfwers to the 27th olympiad, and 671ft year B. C. The Marbles inform us likewife, that " he taught the nomes, or airs, of the lyre and flute, which he performed himfelf upon this laft inftrument, in concert with other players on the flute." Several writers tell us that he added three ftrings to the lyre, which before his time had but four ; and in confirmation of this, Euclid and Strabo quote two vcrfes, which they attribute to Terpander himfelf. " The tetrachord's reftraint wc now defpife. The feven-flringed lyre a nobler flrain fupplics." T E R If the hymn to Mercury, which is afcribcd to Homer, and in which the feven-ftringed lyre is mentioned, be genuine, it robs Terpander of this glorj-. The learned, however, have great doubts concerning its authenticity. But if the lyre had been before his time furniflied witli feven ftrings in other parts of Greece, it feems as if Terpander was the firft who played upoii them at Lace- dasmon. The Marbles tell us that the people were offended by his innovations. The Spartan difcipline had deprived them of all their natural feehngs ; they were rendered machines ; and whether Terpander difturbed the fpriiigs by which they ufed to be governed, or tried to work upon them by new ones, there was an equal chance of giving offence. The neivjhiiigs, or new melodies, and neiv rhythms, upon the old ftrings, muft have been as intolerable to a Lacedxmonian audience, at firft hearing, as an organ, and cheerful mufic would have been, to a Scots congregation fome years ago, or would be at a Quaker's meeting now. " It is not at all furprifing," fays Alcibiades, " that the Lacedaemonians feem fearlefs of death in the day of battle, fince death would free them from tiiofe laws which make them fo wretched." Plutarch, in his " Laconic Inftitutions," informs us, that Terpander was fined by the ephori for his innovations. How- ever, in his " Dialogue on Mufic," he likewife tells us, that the fame mufician appeafed a fedition at Sparta, among tiie fame people, by the perfuafive ftrains which he fung and played to them on that occaCon. There feems no other way of reconciling thefe two accounts, than by fuppofing that he had, by degrees, refined the public tafle, or depraved his own to the level of his hearers. Among the many fignal fervices which Terpander is faid to have done to mufic, none was of more importance than the notation that is afcribed to him for afcertaining and preferving melody, which was before traditional, and wholly dependent on memory. The invention, however, of mufi- cal charafters has been attributed by Alypius and Gauden- tius, two Greek writers on mufic, and, upon their authority, by Boethius, to Pythagoras, who flouriftied full two cen- turies after Terpander. It will be neceffary therefore to tell the reader upon what grounds this ufeful difcovery has been beftowed upon him. Plutarch, from Heraclides of Pontus, affures us that Ter- pander, the inventor of nomes for the cithara, in hexameter verfe, " fet them to mufic," as well as the verfes of Homer, in order to fing them at the public games. And Clemens Alexandrinus, in telling us that this mufician wrote the laws of Lycurgusin verfe, and " fet them to mufic," makes ufe of the fame expreffion as Plutarch, which feems clearly to imply a ivritten melody. See Mufical Games. TERPELING, in Geography, a town of Thibet; Smiles S.W. of Painom Jeung. TERPENTARIA, in Bolany, a name ufed by fome authors for the betonica aquatica, or great water-figwort, called ivater-betony. TERPILLUS, in Ancient Geography, a town of Mace- donia, in Mygdonia. Ptolemy. TERPONUS, a town of Illyria, belonging to the Japodes, of which Csfar took poffeflion, according to Appian. TERPSICHORE, the Jovial, as her name imports, in Mythology, the name of one of the nine Mufes, (which fee.) This mufe is reprefented on medals and other'monu-. ments, by the flutes which ftie holds in her hands. TERRA, in Geography. T Terra, in Chemijlry. > Sec Eartu. Terra, in Natural Hiflory. j Terra T E R Tekua Alana, a name given to the yeUowifh-while '"terka Mamlea, a name given to the alkaline red mould. See A DA MIC Earlh. Terra Armenia. See Bole. Ti-RU \ de Baira, the name given by fome to an earth of a white colour, found about Baira, near Palermo. It is cfteemed a very great medicine in the cure of ma- lignant fevers, and in the (topping of hemorrhages of all kinds. The powder of it is commonly fold m Italy under the name of Claramont-powder ; a name it obtamed from a norfon who firft found out its virtues, and communicated them to the world in a treatife exprefsly written on the fub- jcft. Boccone, Muf. de Fific. Terra Carlo/a. See Tuii'Ol.i. Terra, Chio, in the Materia Medica of the Ancients, an earth of the marie kind, found in the ifland of Chio, and given internally as an aftringcnt ; but its chief ufe among them was as a cofmetic, the ladies efteeming it the fineft of all things for clearing the fl. Terra Damnata. Sec Caput 3iortuum. Terra Foliata Tartari, foliated earth of tartar, is a name improperly given to a neutral acetous fait, with a bafis of fixed vegetable alkali ; or to a combination of the acid of vinegar, faturated with the alkali of tartar, or of other vegetable matter. This fait has alfo been called regenerated tartar, becaufe the alkali of taitar is united with an acid, which is in fome refpeCls fimilar to the acid of tartar, but is in others very different. The terra foliata is made by pouring upon a quantity of alkaline fait of tai-tar, in a glafs cucurbit, a fufficient quan- tity of good diftilled vinegar, at different times, to faturate all the aikah, or even a little more than is neceffary for that purpofe, till the effervefcence entirely ceafes. This faturated liquor is to be filtrated and evaporated to dryhefs, with a gentle heat. The dry fait thus obtained is to be diffolved • in fpirit of wine, and the folution again evaporated to dry- nefs ; by which means a fait is obtained more or lefs white, of a filky appearance, and compofed of fmall fcales or leaves, whence it has been c^&e A foliata. When the fait is di-ied, and wliile it is hot, it muft be fhut up in a well-clofed bottle, becaufe it quickly becomes moid by expofure to air. When diftilled vinegar is poured upon fait of tartar, little or no effervefcence is made at firft, becaufe a part of the alkaline fait employed is generally cauftic, or deprived of its gas, which part unites with the acid preferably to the mild part of the alkali, and abforbs any gas that is extricated from the latter part ; and, therefore, tiU all the cauftic part of the alkali be nearly faturated, little or no effervefcence can happen. But when more vinegar is added, the effervefcence becomes fo confiderable, that fome of the liquor will, without care, flow over the velfel. This effervefcence is oc- cafioned by a large quantity of air that is difengaged during tlie faturation. When the faturation is advanced to a car- T E R tain degree, the effervefcence diminifhes ; but the combination of the laft portions of the acid and alkali may be facilitated by frequently agitating the liquor, whicl; will renew the effervefcence. The tafte of the foliated earth is (harp, pun- gent, a little cauftic, and partaking at the fame time of the tafte of vinegar and that of fixed alkah. It is foluble in fpirit of wine, and may be decompofed merely by the aftion of fire, and from it may be obtained by diftillation, a very penetrating and concentrated radical vinegar. It is little ufed except in medicine. Macquer's Chem. Dift. Preparations of this kind are given in dofcs of ten or twenty grains as mild aperients, and to a drachm or two as purgatives and diuretics. Lewis. Terra Goltbergenfa. See Goltbergensis Terra. Terra Japonica. See Japan Earth, and Catechu. Terra Lemma. See Lemnian Earth. Terra Lignicenfis. See Lignicensis Terra. Terra Liiionica. See Livonica Terra. Terra Melia. See Melia Terra. Terra Melitenfs. See Melitexsis Terra. Terra Merita, in the Materia Medica, a name given by fome authors to the curcuma, or turmeric-root. It is from a falfe pronunciation of this name, terri merit, that the Englifti turmeric has its origin. Terra Mifcetta. See Thraustomicthes. Terra Noceriana. See Noceriana. Terra Samia. See Samia Terra. Terra Selensufiaca. See Seleneusiaca. Terra Sigillata. See Sigillata. Terra Sigillata Magni Ducts. See Etrusca Terra. Terra Sigillata Fufca, a bole of a beautiful brown colour, found in Germany, England, and America. It is of a denfe texture, makes no fermentation with the ftrongeft acids, and if thrown into water, it foon feparates into a number of thin flakes. The Germans give it in fluxes and malignant fevers, being an excellent aftringent, and worthy to be introduced into our ftiops. Terra Sikfiaca, Silejian Earth, a fine aftringent bole, called by fome authors axungia folis. It is very heavy, of a firm compaft texture, and in colour of a brownifh-yellow. It breaks eafily between the fingers, and does not ilain the hands, is naturally of a fmooth furface, and is readily diffufible in water, and melts freely into a butter-Hke fubftance in the mouth ; it leaves no grittinefs between the teeth, and does not ferment with acid menftrua. Thefe are the charaAers by which it is known from all other earths of a like colour ; it is found in the perpendicular fiffures of rocks near the gold-mines at Strigonium, in Hun- gary, and is fuppofed to be impregnated with the fulphur of that metal. It is, however that be, a good aftringent, and better than moft of the boles in ufe. Hill. The terra Silefiaca is alfo called terra Jigillata Strigonienjit. Terra Sinopica. See Sinopica Terra. Terra SoUs, a name given by the German naturalifts to a kind of black fpungy earth, fomewhat approaching to the nature of that Englifh black earth which we call kella-w, but contjiining gold. It is not properly an ore of gold, but is an earth into which fame fm.all particles of gold have been wafhed from fome other place, and there detained. A good microfcope will difcover thefe particles in the richer pieces of the earth, and they are bright and pure, though very fmall : the earth is found in fiiTures of the other ftrata, not in any beds or ftrata of itfelf. It is not to be had in any great quantity, nor does it contain any large portion of gold. Terra Strigonienfis. See Stbigokiensis Terra, 6 Terra T E R T E R Terra Tiirchn. See Turcica Terr/i. Tf.rka Virghie ylurea, in N a! lira! i'ljlory, llie name of a medicinal eartli, meutioned by Boccone. It is found at a place called Sanfto Paolo, in the (late of Modena ; and is thence fent to Venice, and many other places, where it is eileemed a very famous medicine. Its great ufe is in hsemorrhages of all kinds ; but it is alfo given witli fuccefs in malignant fevers. Boccone, Muf. de Filic. Terra Vlrldis, See Terrk Ferk. Terra Umbri. See Umber. Tkrra Zoica, a name given to the alkaline red mould, called alfo Adamic earth. Terra Petita, in Law. See Summons. Terra, in our Ancievt Laiu-Boohs, occurs in the fenfe of land, or ground, joined with divers additions ; as. Terra Normamwrum, the lands of fuch Norman noble- men as were forfeited to the crown, by the owners taking part with the French king againft Henry III. Terra frufca, fuch land as had not been lately ploughed. Terra gUliflorata, land held by the tenure of paying a gilliflower j'early. Terra vejlita, land fown with corn, and the crop ilill remaining thereon. Terra tejlamentalis, land held free from feudal fervices, and devifable by will. Terra ciilta, land that is tilled and manured, in contradiflinftion to terra iticulta. Terra ajirmata, land let out to farm. Terra ilomi- nica, or indom'wica, demefne land of a manor. Terra hydata, was land fubjeft to the payment of hydage. Terra liicrabiUs, land that may be gained from the fea, or enclofed out of a wafte or common to particular ufes. Terra luairiabilis, tillage-land. Terra auareda, fallow-land. Terra bofcalis, ■wood-land, &c. Terra Extendenda, is a writ direfted to tlie efcheator, &c. ordering him to inquire and find out the true yearly value of any land, &c. by the oath of twelve men, and cer- tify the extent in chancery. Terra or Tierra ^ujlralis del Efpirku Santo, in Geography, an ifland in the South Pacific ocean, and the moil wefterly as well as the largcll of thofe called New Hebrides: dif- covered by Quiros, and vifited by captain Cook in the year 1774; 22 leagues long, 60 miles in circuit, and 12 in breadth. The land of it, efpecially the well fide, is ex- ceedingly high and raoimtainous : and in many places the hills rife direftly from the fea. Except the cliffs and beaches, every other part is covered with wood, or laid out in plantations. Befides the bays of St. Philip and St. Jago, the ifles which lie along the fouth and eaft coafl cannot, in the opinion of captain Cook, fail of forming fome good bays or harbours. S. lat. 14° 40' to 15° 40'. E. long. 166' 45' to 167° 32'. Terra Firma is fometimes ufed for a continent, in con- tradiftinftion to iflaiids. Thus Afia, the Indies, and South America, are ufually diftinguifhed into terra firmas and iflauds. Terra Firma, in a m.ore reftridlcd feafe, denotes an im- menfe extent of country under the authority and government, direft or indireft, of the crown of Spain, comprehending feveral extenfive provinces, and three audiences, fixed at Panama, Quito, and Santa Fe de Bogota : the large pro- vinces are Terra Firma Proper, Popayan, Quito, and New Granada, all of which ai'e again fubdivided into feveral fmaller provinces or jurifdiftlons. Terra Firma, or Tierra Firme, in a ftill more confined fenfe, comprifes three diftrifts in the viceroyalty of New Granada, T)iz. Darien, Panama or Tierra Fii'me Proper, and Veragua. Terra Firma, or Tierra Firme, Preper. See Panama. Terr.a. del Fiiego, a largo ifland, feparatcd from the foutliern extremity of America by a narrow fea, called the " Straits of Magellan:" fo named from the volcanoes obf^Tved on it. Capt. Cook was the firll navigator wiio had the honour, from a ferics of the moll fatisfatlory ob- fervations, beginning at the W. entrance of the Straits of Magellan, and carried on with unwearied diligence round this iiland, through the ftrait of Le Maire, to conftruft a chart of the fouthern extremity of America. The fouth - weft coaft of Terra del Fuego, fays this diftinguifhed navi- gator (Second Voyage, vol. ii. p. 199, &c.) " with reipcft to inlets, iflands, &c. may be compared to the coafl of Norway ; for I doubt if there be an extent of three leagues where there is not an inlet or harbour, which will receive and fhclter the largeft fliipping. The woril is, that till theie inlets are better known, one has, as it were, to fifh for anchorage. There are feveral lurking rocks on the coaft ; but happily none of them lie far from land, the approach to which may be known by founding, fuppoling the wea- ther fo obfcure that you cannot fee it. For to judge of the whole by the parts we have founded, it is more than probable that there are foundings all along the coaft, and tor feveral leagues out to fea. Upon the whole, it is by no means the dangerous coaft it has been reprefented. The currents between Cape Defeada and Cape Horn fet from weft to eaft, that is, in the fame direftion as the coaft ; but they are by no means confiderable. To the eaft of the cape, their ftrength is much increafed, and their diretlion is north-eaft to Staten Land. They are rapid in Strait le Maire, and along the fouth coaft of Staten Land, and fet like a torrent round Cape St. John, where they take a north- weft direAion, and continue to run very ftrong both v/ithin and without New Year's Ifles. While we lay at anchor within this iiland, I obferved that the current was itrongeft during the flood ; -and that on- the ebb its ftrengtli was fo much impaired, that the fhip would fometimes ride head to wind, when it was at weft and weft-north-weft. This is only to be underflood of the place vvhei'e the fhip lay at anchor ; for at the very time we had a ftrong current let- ting to the weftward, Mr. Gilbert found one of equal ftrength near the coaft of Staten Land fetting to the eaftward ; though probably this was an eddy current or tide." Moft writers who have mentioned the ifland of Tej-ra del Fuego, defcribe it as deftitute of wood, and covered with fnow. The latter circumftance may occur (fee Hawkefworth's Voyages of Cook, &c. vol. ii.) in winter. And by thofe who faw it at that feafon, it might be con- ceived to be without wood. Lord Anfon was there in the beginning of March, anfwering to our September ; but Capt. Cook was there in the beginning of January, cor- refponding to our July ; and thus we may account for their different ftatements. We fell in with it, fays Cook, about 2 1 leagues W. of the ftrait of Le Mai'-e, and trees were vifible with glafles ; and though upon approaching it patches of fnow were difcoverable, yet the fides of the hills and the fea-coaft appeared to be covered with a beautiful ver- dure. The hills are lofty, but not mountainous, though their fummits are quite naked. The foil in the vaUies is rich, and of a confiderable depth ; and at the foot of almoft every hill there is a brook, the water of which has a reddifti hue, but it is not ill-tafted. The moft remarkable land in Terra del Fuego is a hill, in the form of a fugar-loaf, which ftands on the W. fide, not far from the fea ; and the three hills, called the " Three Brothers," about nine miles W. of Cape St. Diego, the low point that forms the en- trance of the ftrait of Le Maire. ( Set Le Maire. ) In his T E R his fecond voyage, Capt. Cook, dofirous of coafting the S. fide of Terra d.l Fuego, rouiul Cape Horn, to the ftrait of Le Mairc, reached the W. coaft of the ifland Dec. 17, 1774, and having continued to range it till the 20th, carae to an anchor in a place wiiich he called " Chrift- mas Sound." Through the whole courfe of his naviga- tions, he had never feen fo defolate a coaft. It feems to he entirely compofcd of rocky mountains, without the leaft appearance of vegetation. Thefe mountains terminate in horrible jirecipices, tlie crni^gy fummits of which fpire up to a vaft height ; fo that fcarcely any thing in nature can appear with a more barren and favage afpedt than tlie whole of the country. But barren and dreary as the land is about Chriftmas Sound, it was not wholly deftitute of accommo- dations. Near every harbour our navigator found frefh water, and wood for fuel. The country abounds hkewife witli wild fowl, and particularly with geefe : which, with their Madeira wine, enabled them to keep a cheerful Chrift- mas. The inhabitants of Terra del Fuego were found by Capt. Cook to be of the fame nation which he had formerly leen in Succefs Bay, and the fame with thofe denominated by M. de Bougainville " Pecharas." They are a little, ugly, half-ftarved, beardlefs race, and go almoft naked : but it is their own fault that they are not better clad, as nature has furniftied tliem witli ample materials for that purpofe. By lining their feal-flcin cloaks with the (kins and feathers of aquatic birds, by making the cloaks themfelves larger, and by applying the faine materials to different parts of clothing, they might render their drefs much more warm and comfortable. But while they are doomed to exift in one of the moft inhofpitable climates on the globe, they have not fagacity enough to avail themfelves of thofe means of adding to the conveniencies of life, which Providence has put into their power. The captain, after having wit- neffed many varieties of the human race, pronounces the Pecharas to be the moft wretched. Thofe on the S. are faid to be uncivihzed, treacherous, and barbarous ; while thofe on the oppofite fide are reprefented as fimple, affable, and perfeftly harmlefs. The tents which they inhabit are made of poles, difpofed in a conical form, covered with (kins, or the bark or leaves of trees. The country, though barren, abounds with a variety of unknown plants, for ex- citing the curiofity of the botanift. The extent of Terra del Fuego, and confequently of the ftraits of Magellan, was afcertained by Cook to be lefs than had been laid down by the generality of navigators : nor was the coaft, upon the whole, found to be fo dangerous as it has been repre- fented : the winter was alfo remarkably temperate. The fea-lions and fea-bears, the (hags and penguins on the coaft, are abundant, and intermix, like domeftic cattle and poul- try in a farm-yard, without attempting to moleft one an- other. Eagles and vultures were feated on the hills among the (hags in perfeft tranquillity. Sir Jofeph Banks, Dr. Solander, and fome others, landed here in the month of .January 1769, which is the time of fummcr in that part of the globe, notwithftanding which, two of the company fell a facrifice only by deeping one night, and Dr. Solander himfelf hardly efcaped. S. lat. 52° 30' to ^f 35'. W. long. 51° 20' tc 58^. Terra Magellanica. See Patagonia. Terra Ni-va, a bay in Hudfon's Bay. N. lat. 62° 4'. W. long. 67^. Terra ilos Fumos, a trad of country on the S.E. of Africa, N. of Natal. TERJtA Nova, a fea-port town of Sicily, in the valley of Noto, fituated in a gulf or bay of the Mediterranean, founded about the middle of the 13th century, by the era- T E R peror Frederick II. near the fcite of the ancient Gela. The number of inhabitants is about 700 ; 50 miles W. of Syra- cufc. N. lat. 37°. E. bng. 14° 10'. — Alfo, a river of Sicily, which runs into the fea on the S. coaft. N. lat. 37°. E. long. 14° 10'. Teuua Nuova, a town of the ifland of Sardinia, fituated in a bay of the Mediterranean, at the bottom of which is the harbour, built on the ruins of Civita, an ancient cpif- copal town ; 57 miles E.N.E. of SafTari. N. lat. 40° 52'. E. long. 9° 40' Alfo, a town of Etruria ; 14 miles N.W. of Arezzo. Terra del Paluccl, a town of Sicily, in the valley of Mazara, on the fcite of the ancient Pelinus. Terra Vecchia, a town of Naples, in Calabria Citra ; 2 miles' S. of Cariati Nuovo. Terra a Terra. Gallies and other veffels are faid to go terra a terra, when they never go far from the coaft. The phrafe is alfo applied, in the manege, to horfes that make neither curvets nor balotades, but run fmoothly on the ground in a prefTed gallop, only making httle leaps or rifings with the fore-feet. The gallop is the foundation of the terra a terra, for iu thefe two motions the principle of the adtion is the fame, fince the terra a terra is only a fhortened gallop with the croupe in, and the haunches following in a clofe and quick time. And as the mezair is higher than the aftion of terra a terra, and lower than that of curvets, it may be con- cluded that the terra a terra is the foundation of the mezair, as well as of curvets. In the terra a terra the horfe fhould be more together than in the gallop, that he may mark his time and cadence more diftinAly ; although in a true terra a terra there are no times to be marked, for it is rather a gliding of the haunches, which comes from the natural fprings in the limbs of a horfe. When a horfe works terra a terra, he always ought, as in the gallop, to lead with the legs that are within the volte, his two fore-feet being in the air, and the moment they are coming down, his two hind feet following. The aftion of the gallop is always one, two, three, and four ; the terra a terra is performed upon two lines and in two times. To work a horfe terra k terra upon large circles, take care to keep the body ftraight, fteady, and true in the faddle, without leaning to one fide or the other. Lean upon the outward ftirrup, and keep the outward leg nearer the fide of the horfe than the otlier leg, taking care to do it fo as not to be perceived. If you go to the right, keep your bridle-hand a little on the outfide of the horfe's neck, turning your little finger up without turning your nails at the fame time ; although, if need be, you muft turn them in order to make the inner rein work which paffes over the httle finger. Keep your arms and elbows to your hips ; by this means you will affure and confine your hand, which ought to accompany, and, as it were, run along the line of the circle with the horfe. Berenger's Art of Horfemanfhip, vol. ii. c. 17. The term is alfo appHed by the French to dancers, who cut no capers, nor fcarcely quit the ground. And hence, alfo, it is figuratively apphed to authors, whofe ftyle is low and creeping. TERRACE, in Gardening, is a fort of raifed bank of earth, &c. regularly formed in an oblong ma.iiner to any length, broad enough to admit of a fpacious level walk at top, and elevated confiderably above the level of the gene- ral furface ; having the fides uniformly (loped, and laid with grafs, and the top formed into a fl^t or level, fufftcicntly broacl T E R T E 11 hroad for a grafs or gravel walk of proportionable vvidtli ; defigned in gardens as a high, airy walk, to command a better profpeft of the adjacent places around, within and without the garden occafionally, as well as to enjoy the frefh air in fummer more freely. In tiie former ityle of laying out gardens, it was confidered as very ornamental, but is at prcfent much in difufe. It may be remarked, that the height of a terrace-walk may be more or lefs, as the fituation admits, as from one foot to one or two yards, or even three or four yards or more in particular fituations ; and where there is plenty of earthy materials, rubbifli, &c. to form it, allowing breadth in pro- portion, from five to ten or twenty feet or more, and ex- tended to any length required. They arc fometimes formed on fome naturally high rifing ground, to fave as much troable as poffible in bringing ftuff from a diftance ; and fometimes raifed wholly of forced materials. But the fitua- tion for a terrace may be varied as the natural fituation of the place may require. In refpeft to form, they fhould always be broader at the bafe than the top, and extend lengthways to any diftance required ; having the fides regularly (loped, of more or lefs acchvity, as the width, height, and fituation admit. Some- times both fides are Hoped, and fometimes only one fide, the other perpendicular, and faced with a fubilantial wall, &c. or formed againft the fide of a hill, or fome naturally rifing ground, being finifhed always broad enough at top to admit of a proper walk. In fome naturally elevated fituations, terraces are fometimes formed one above another, in two or more ranges, each having its feparate fide fiopes, and elevated walk ; in all of which the Hopes are to be neatly laid with grafs, and the walk at top occafionally of grafs or gravel. The entrances leading to terrace-walks were formerly fometimes formed by an eafy acclivity of a grafs or gravelled flope, and fometimes by a grand flight of ftone fteps. Where a rifing ground of confiderable elevation naturally prefents itfelf in a proper fituation, it is an eligible oppor- tunity for forming a terrace with the leaft expence and trouble, on account of its not requiring the addition of fo much earth and rubbifh, as when raifed entirely on a per- feft level, wholly of made earth. Where there are any excavations of ground intended to form ha-has, pieces of water, &c. the excavated earth may be employed in form- ing terraces, &c. In the bufinefs of forming a terrace, the bafe muft be ftakedout wider than the intended width at top for the walk, in order to admit of the afcent of flopes being moderate. And the whole of the made earth and rubbifli muft be well ram- med and rolled down from time to time as it is applied, in order to render the whole equally firm, that it may not fettle irregularly after being finiftied. The flopes may either be laid with turf, or fown with grafs-feeds ; but the firft is much the beft method, where it can be employed. See Grass Ground. Terraces are now but little attended to, and, of courfe, but feldom employed in modern ornamental gardening, as they are moftly confidered as having a too ftiff and formal appearance, and as not conftituting that fort of neatnefs and tafteful elegance, which is fo much eftecmed and ad- mired at prefent in all forts of works of the garden kind. Terrace, Counter, is a terrace raifed over another to join two grounds, or raife a parterre. Terrace is alfo applied to the roofs of houfes that are flat, and on which one may walk ; as alfo to balconies that projeft. The terrace is properly the covering of a building which Vol. XXXV. is in platform ; as that of the jjcriftyle of the Louvre, or that ot the obfervatoiy, paved with flint and mortar. All the buildings of the Oriental nations arc covered with ter- races, to take the frefli air on, and even to lie on. See Pave- WRNT of Terrace. Trriiace, or Terras, ufed for mortar. See Tarrace. TERRACINA, in Geography, a town of the Pppe- dom, in tlic Carnpagna di Roma, fituated in a very fruitful but marfliy country, which makes the air unwholcfonie. This town was anciently the capital of the Volfci, and named Anxur. The Greeks called it Trachyna, corrupted into Terracina. In the year of Rome 348, it was taken and plundered by Fabius Ambuftus ; and in 424 was made a Roman colony. Being built on a rock, in the reign of Tiberius 20,000 perfons viere killed by the fall of a theatre. It is now a poor place. It had once a harbour : but that is choaked up ; near Terracina are confiderable fragments of the Via Appia, made from Rome to Capua by Appiui Claudius Coccus, and begun by him while ccnfor, in the year of Rome 440 : this road was paved with hard ftone of various fizes, but uniformly twelve inches in thicknefs ; and was wide enough for two carriages; 47 miles S.E. of Rome. Near this place was a fountain of Neptune, the water of which was faid to be fatal. TERRADEGLIAS, or Terradellas, Domenico, in Biography, a native of Barcelona, in Spain ; but who went early into Italy, where he ftudied mufic at Naples under Durante, as an accomplifliment ; but was reduced, by accidents in his family, to praftife it as a profelTion. He began to flourifli about 1739, when he compofed the opera of " Aftarto," and part of " Romolo," in con- junftion with Latilla, for the Teatro delle Dame, at Rome. In the latter end of the year 1746 he came to England, where he compofed two operas, " Mithridatce" anil " Bellerophon." But unfortunately for the compofjr, none of the fingers of this time ftood high in the favour of the pub- lic. Yet his opera of " Mitridate," we well remember, received much applaufe, as mufic, diftindl from what was given to the performers. And liis compofitions, when executed in Italy by fingers of the firft clafs, acquired him great re- putation. Befides the favourite fongs in the two operas juft men- tioned, which are printed by Walfli, Terradellas himfelf, while he was in England, pubhflied a coUedlion of twelve Italian airs and duets in fcore, which he dedicated to lady Chefterfield. In thefe he feems lefs mafterly and original than in his other produftions that have come to our know- ledge. , In the fongs he compofed for ReginelU, a very learned finger in ruin, we find boldnefs and force, as well as pathos. And fome arte di bravura of his compofition, for the celebrated tenor finger Babbi, at Rome, abound with fire and fpirit. If his produftions are compared with thofe of his contemporaries, his writings, in general, muft be allowed to have great merit ; though his paflages now feem old and common. This corapofer having fpent his youth in Catalonia, was not regularly initiated into the myfteries of counterpoint in any Neapolitan converfatorio, having been placed under Durante, for a fliort time, only as a private fcholar ; and we think we can fometimes difcovcr in his fcores, through all his genius and elegance of ftyle, a want of ftudy and harmonic erudition. Terradellas was remarkable, not only for attending, in every fituation of tiie finger, to the fpirit of the drama which he had to compofe, but for giving good mufic to bad fingers, and not uni/cr-writing, as Mr. Bayes calls it, the inferior parts of his theatrical pieces. Indeed, it has always appeared to us, that an exquifite finger who can command 3 B attcntioe T I', R atfntion bv the mere tone of his voice, and who nqmrcs on?/ a cj„A.aj, or outline, to colour at his plc-afure, is m lefs want of artificial and captivating compoiition, than an ordi- nary- finger, who is neither pofTi-ffed ot voice nor tafte fuffi- cient to intcrcft the audience. And Terradelks feems to have written all his fongs for performers of abilities ; for his airs are never made eafy and trivial in order to fpare the linger. Joinelli's pen always flowed with this fpirit ; for he never rcjeiftcd a pafTage that prefented itfelf, becaufe it would he difficult and troublefome in the execution ; but this freedom of ftyle, twenty years a^o, might be more fifely praftifed than at prefeiit : for it is well known, that a company of fingers is now reckoned good, in Italy, if the two iirft performers are excellent ; and an opera is fure to pleafe if two or three airs and a duet dcferve attention ; the audience neither expefting nor attending to any thing elfe. And the managers, who find this cuftom very convenient, take care not to interrupt play or converfation by the ufe- lefs and impertinent talents of the under-fingers ; fo that performers of the fecond or third clafs are generally below raediocnty. He died at Rome in 1751, of grief and mortification, for the failure of an opera which he had compofed with more care and hopes of fuccefs than ufual. TERRiE -^g^r, Amittere, Aratrum, Aratura, Denartatus, Legem, Lex, Librata, Obolata, Quadraniata, Quadrugata, Trinoda, and Uncia. See the feveral articles. Terr.s Filiustfon of the earth, a ftudent in the univeriity of Oxford, formerly appointed in public acts to make jeft- ing and fatirical fpeeches againft the members of them, a-nd to tax them with any growing corruption, &c. Terr.i Oleum. See Oil of the Earth. TERR^JEBIN. See Terenjaeik. TERRACE, or Terragium, anciently Cgnified a fer- vice, in which a tenant or vaflal was bound to his lord, to plough and reap the ground for him. Others Tvill have it to have been money paid for digging or breaking the ground in fairs and markets. " Quieti fint de thelonio, pavagio, paflagio, laftagio, tal- lagio, carvagio, prifagio, et terragio." TERRAIGNOL, in the Manege, a horfe that cleaves to the ground, that cannot be made light upon the hand, that cannot be put upon his haunches, that raifes his fore- quarters with dif&culty, that is charged with fhoulders, and, in genera!, one whofe motions are all fliort, and too near the ground. TERRAIN, is the manege ground, upon which the horfe makes his pifte, or tread. TERRANTONA, in Geography, a town of Spain, in Aragon ; 8 miles S.E. of Ainfa. TERRANUOVA,atown of Naples, in Calabria Citra ; 9 miles N. of BiCgnano. TERRAON, or ToRRAov, O, a town of Portugal, in Alentejo ; 24 miles N.W. of Beja. TERRAPOUR, a town of Hindooftan, in Baglana ; 32 miles N. of Baffeen. TERRAQUEOUS, compounded of terra and aqua, earth and •water, an epithet given to our globe or earth, con- fidered as confifting of land and water, which together conditute one mafs. Some philofophers, particularly Dr. Burnet, charge the frame and faftiion of the terraqueous globe as rude, unartful, and difordtrly, and conclude it highly abfurd to fuppofe it came thus cut of the hands of the Creator ; and, therefore, have recourfe to the deluge for making it thus. But others can perceive much art and conveniency, even 9 T E R iTi this apparent diforjer : Dr. Derham particularly obferves, that the diltribution of land and water is admirable ; tlie one being laid over the other fo ikilfully through all the world, that there is a juft equipoife or balance of the whole glob?. Thus the Northern ocean balances the Southern, and t!v American continent is a counterpoife to the Eiu-opean, African, and Afiatic. And what forae may object, that the waters occupy too great a part of the globe, which they imagine would be of more ufe if it were dry land, he obviates, by fhewing that this would deprive the world of a due quantity of vapours and rain ; for if the cavities which contain the fea and other waters were deeper, though the quantity of water were the fame, and only the furface lefs and narrower, the evapor- ations would be fo much the lefs, inafmuch as they are made from the furface, and confequently are in proportion to it. TE R RA R. See Terrier. TERRAS. See Terrace and Pavement. Terras, Marble. See Marble. TERRASSE, La, in Geography, a town of France, in the department of the Ifere ; 13 miles N.N.E. of Grenoble. TERRASSON, John, Abbe, in Biography, a man of letters, was born at Lyons in 1670, and fent by his father, who was a very religious man, to the houfe of tlie Oratory in Paris ; but the fon, quitting this congregation, and difap- pointing his father's viewa, incurred his refentmcnt, fo that he was left with a very moderate pittance. However, the abb6 Bignon procured him zdmiffion into the Academy of Sciences in 1707 : he foon became a member; and in 1721, profeflbr of Greek and Latin in the Royal College. Under the famous fyilem of Law, he acquired temporary opulence, but was foon again reduced to penurious circumftances. He then retired from the world, ftudying and exercifing that philofophy which raifed him above it. He died at Paris in 1750, at the age of 80 years. His works are, " A Critical Differtation on Homer's Iliad ;" " Refie&ions in favour of Law's Syftem ;" " Sethos," a moral romance ; "A Tranflation of Diodorus Siculus," 7 vols. l2mo. with preface, notes, and fragments. It was one of Terraflbn's fayings, "What is the moft credulous of all things ? Igno- rance. What is the moft incredulous ? Ignorance." Andre^w Terrajfcn, the elder brother of the former, a prieft of the Oratory, was a celebrated preacher, and died at Paris in 1723. His "Sermons," in 4 vols. i2mo. were published in 1726, and reprinted in 1736. Gajpard Terrajfon, another brother, and prieft of the Ora- tory, was more celebrated as a preacher than the former, and officiated at Paris during five years. Haring incurred perfe- cution, he quitted the pulpit and the congregation of the Oratory. He died at Paris in 1 752. His " Sermons," in 4 vols. i2mo. appeared in 1749. His anonymous work, entitled " Lettres fur la Juftice Chretienne," was cenfured by the Sorbonne. Another perfon of the fame family, -j/z. Matthew Terrajfon, was born at Lyons in 1 669, ftudied the law, and pleaded caufes with great reputation. He was for fom.e time an affociate in the " Journal des Sjavans," and alfo cenfor royal. He died, mi/ch efteemed, at Paris, in 1734. A "CoUeftionof his Pleadings, &c." was pubhftied in 4*0. The fon of the preceding, Anthony Terraffon, was bom at Paris in 1 705, brought up to the bar, and excelled in jurif- prudence. By order of chancellor d'Agueffeau, he com- pofed a " Hiftory of Roman Jurifprudence," with a collec- tion of Ancient Contracts, &c. in fol. 1750. In 1760 he was promoted to the chancellorfhip of Dorabes, and died in 1 782. He was the author of " Melanges d'Hiftoire, de Liter- T E R T E R Literature, de Jurifprudcnce, de Critique, &c." 1768 ; and of other works. Morcri. Nouv. Dift. Hift. Gen. Biog. Terkas.sON, in Geography, a town of I'Vance, and feat of a tribunal, in the department of tlie Dordogne ; 1 8 miles N.E. of Montignac. N. lat. 45° 7'. E. long. 1° 23'. TERRAUBE, a town of France, in the department of the Gers ; 4 miles S.W. of Leftoure. TERREBONNE, a town of Canada ; 1 2 miles N.N.W. of Montreal. TERREGLES, a town of Scotland, in the county of Dumfries ; z miles W. of Dumfries. TERREL, a town of North Carolina ; 30 miles N. of Greeneville. TERRELLA, ^v.^^yr,, Uttle earth, is a magnet turned of a juft fpherical figure, and placed fo as that its poles, equator, &c. do exatlly eorrcfpond with thofe of the world. It was thus firll called by Gilbert, as being a juft repre- feutation of the great magnetic globe we inhabit. Such a tenella, if nicely poifed, and placed in a meridian like a globe, it was fuppoled, would be turned round like the earth in twoaity-four hours by the magnetic particles per- vading it ; but experience has fhewn this to be a miftake. TERRE-PLEIN, in Fortif ration, the top, platform, or horizontal furface of the rampart, on which, the canno.i are placed, and the defenders perform tlieir office. It is thus called as lying level, having only a litth (lope outwardly to bear the recoil of the cannon. It Is terminated by the parapet on that fide Cowards the champaign ; and by the inner talus on that fide towards the place. Its breadth is from 24 to 30 feet. TERRESCHOW, in Geography, a town of Bohemia, in the circle of Pilfen ; 16 miles N.E. of Pilfen. TERRESSA, one of the Nicobar iflands, about fifteen miles long, and from two to five broad, of an oval form. N. lat. 8° 20'. E. long. 93° 36'. TERRESTRIAL Birds. See Birbs. Terrestrial Gloie. See Globe. Terrestrial Line. See Line, Terrejlrial. Terrestrial Paradije. See Paradise. Terrestrial Roads. See Road. ^ TERRE-TENANT, is he who has the adtual pof- fcflion of the land, othcrwife called the occupant. See Tenant and Occupant. Thus a lord of a manor having a freeholder, who letteth out his freehold to another to be occupied , this occupier who has the aftual pofFefiion is called the terre-tenant. TERRE-VERTE, in the Colour-Trade, the name of a green earth much ufed by painters, botli fingly for a good Standing green, and in mixture with other colours. The name is French, and fignifies green earth. It is an indurated clay, of a deep blueifh-green colour, and is found in the earth, not in continued ftrata or beds, as moft of the other earths are, but in large flat malfes of dif- ferent fizes, imbedded in other ftrata ; thcfe break irre- gularly in the cutting, and the earth is generally brought out 01 the pit in lumps of different fizes. It is of a fine, regular, and even ftrufture, and very hard. It is of an even and glofly furface, very fmooth to the touch, and in fomc degree refembling the moroclithus, or French chalk, but adhering firmly to the tongue. It does not ftain the hands in touching it ; but being drawn along a rough furface, it leaves an even white line, with a greenifti caft. It does not ferment with acids, and is burnt to a dufky brown colour. It is dug in the idand of Cyprus, and io many parts of France and Italy. That from the neighbourhood of Ve- rona has been ufed to be eftecnaed the beft in the world ; but of late there has been fome dug in France that equals it There is alio an earth dug on the Mendip hills, in the finking for coals, which, though wholly unobferved, is neaily, if not wholly, of equal value. When fcraped, and the finer parts feparatcd, it is ready to be made up with oil for the ufe of the painters, .ind make,'! the moft true and lafting green of any fimple body tliey ufe. Hill and Da Cofta. See BERG-Grudn and Verditer. TERRIAGULLY, in Geography, a town of Bengal; 20 miles N.W. of Rajcmal. TERRIAH, a town of Hindooftan, in Rohilcund ; 7 miles S. of Bcrvjilly. TERRIER, or Tekrar, in our jlncienl Cujloms, a col- leftion of acknowledgments of the vafTals or tenants of a lordfhip, containing the rents, fcrviccs, &c. they owe their lord, and ferving as a title or chiim for demanding and exe- cuting the payment of them. At profent, by terrier we mean no more than a book or roll, in which the feveral lands, either of a private perfon, or of a town, college, church. See. are defcribed. The terrier ftioiJd contain the number of acres, and the fite, boundaries, tenants' names, &c. of each piece or parcel. See Domes- Day. Terrier alfo denotes the lodge or hole which foxes, badgers, rabbits, &c. dig themfelves under groutid, and in which they fave themfelves from the purfuit of the hunters. Hence, Terrier, Terrarius, is alfo ufed for a kind of little hound to hunt thofe animals, which, like a ferret, creeps into the ground, and by that means affrights and bites them ; either tearing them with his teeth, or elfe haling them by force out of their holes. See Dog and Hound. Terrier, in Geography, a town of Africa, on the Senegal ; 25 miles S. of Cayar. Terrier Rouge, a town of the ifland of St, Domingo ; 15 miles E.S.E. of Cape Frangais. TERRIFICATIO, a word ufed by fome chemical writers to exprefs the coalition of the earthy particles of fome bodies after fermentation, or during the time of it. TERRILS or Tyrrells Pa/s, in Geography, a poft- town of tlie county of Weftmeath, Ireland ; 40 miles W. from Dublin. TERRIMUNGALUM. a town of Hindooftan, in the Carnatic ; 25 miles N. of Tritchinopoh. TERRIORE, a town and fortrefs of Hindooftan, in the Carnatic; 24 miles N. of Tritchinopoh. N. lat. 11° 12'. E. long. 78- 45'. TEKRIS Boniset CataUis, Reliabendis pqfi Purgationem,\\\ Laif, 2v/i\t for a perfon to recover his l.-mds, goods, or chattels formerly feized, after having cleared liimfelf of a felony, upon fufpicion of which he was conviAed, and delivered to his ordmary to be purged. Terris rt CalaUis Trii/is ultra debitum levatum, a writ judicial for the reftoring lands or goods to a debtor, who is diftraincd beyond the quantity of the debt. See Distress. Terris Liberandis, a writ lying for a man convifted by attaint, to bring the record .nnd procefs before the king, and take a fine for his imprifonmeut, and deUver him his lands and tenements again, and releafe him of the ftrip and wafte. It is alfo a writ for the dehvery of lands to the heir after homage and relief performed ; or upon fcciunty taken that he fliall perform them. TERRITORY, District, the extent or compafs of land within the bounds, or belonging to the jurifdiAion of any ftate, city, or other divifion. See District. It is a maxim, that the church has no territory, ;. e, it has 3B 2 no TERRITORY. r.o temporal juriMiaioti ; and therefore an ecclefiaftical judge cannot arrcll any bodv, not even a prieft. It is much ill this fcnfe that Cujas fays, the church has an auditory, but no territory. Terki TOKY or mjlria of Columbia, in Geography, a Q'ltr'" of America, ceded to the United States by thofe of Maryland and Virginia, and eftabhihed in the year iSooasthefeat of ge- neral government. It is bcauttfuliy fituated on both iides of the Potowmack river, between 38048' and 38^59' N. lat.,and 7' E. and 7' W. long, from Walhington, the capital. The ca- pital is about 77° o' 22" W. from London. It is bounded on the N.E., S.E., and partly N.W., by Maryland ; and on the S.W., and partly N.W., by Virginia : in extent it is ten miles fquare, and contains an area of 6400 fquare miles. The face of the country is elegantly variegated, and affords a great number of beautiful profpeils, of which the Potow- mack river is the leading feature. This diftricl affords a variety of ftreams and fprings for watering the city, and for otlier purpofes : its rivers are the Potowmack or Potomac, the Tiber creek, Reedy creek. Rock creek, and Four-mile Run. The foil is thin and fandy, but fufceptible of im- provement : and the climate is difcriminated by a variable fpring, a pretty warm fummer, an agreeable autuma, and a variable, often very cold, winter. Topographical Tatlf. Counties. Wafliington city . . . - Georgetown, fituated W. of the city Wafhington county, exclufive of the city and! Georgetown - - - - - J Alexandria, on the W. bank of tlie river, in thel lower part of the dillrift - - - J Alexandi-ia county, exclufive of the town Morfe and Melifli. See Columbia and Washington. Tebritoby, Illinois, a territory of America, and likely to become foon one of the moil important ftates in the Union, is fituated between 37° and 41° 45' N. lat., and 10° 15' and 14'' 15' W. long, from Waftiington city ; and is bounded on the N. by the North-weft territory, on the S. by Kentucky and Miflburi territory, on the E. by Indiana territory, and on the W. by Miffouri territory. Its extent from N. to S. is 306 miles, and from E. to W. 210 miles : its area con- tains 50,000 fquare miles, or 32,000,000 acres. The afpeft of the country is level in the fouth, and to the north ele- vated and hilly, but not mountainous. The foil is generally fertile, and produces grain, grafs, fruit, flax, and hemp ; and in the fouthern part, cotton. The climate is temperate and agreeable. Populailon. 8208 4948 23IJ 7227 1325 Counties. * Edward. * .Tohnfon. * Madifon. Randolph St. Clair ' Wabafli. Topographical Table. Population. Chief Town. 7275 5007 12282 Kafkufl TESAKON, in Geography, a town of Africa, in the country of Nalus, on the Nuno Triftao. TESCAPHE, in Ancient Geography, a town of Afia, in Mefopotamia, on the banks of t^he Tigris, near Seleucia. Ptol. TESCHAR, in Geography, a town of Hindooftan, in Lahore ; 42 miles E.S.E. of Bullaufpour. TESCHEN, a principality of Silefia, bounded on the N. by the principaUty of Ratibor, on the E. by Poland, on the S. by Hungary, and on the W. by Moravia. It is for the moft part hilly, the Moravian chain terminating near Jablunkau, in the fouthern part, where alfo begin the Car- pathian mountains. On the other hand, the north part is very fwampy, and overrun with lakes and meres ; notwith- ftanding which, there are feveral fertile fpots. Befides which, it abounds likewife in wood. In the whole princi- pality are five towns, part of the inhabitants of which fpeak German, and the others Polifti. The mountains are inha- bited by Walachians, who make good heyducks, or foot- foldiers. The excellent fire-arms here, called Tefchins, re- ceive their name from this country, and more particularly from its capital, where they ai"-c made in great quantities. Teschen, or Teiffin, a town of Silefia, which gives name to a principality, fituated on the Elfa, partly in a valley, and partly on a hill, and furrounded by a inorafs. It contains a Roman Catholic and a Lutheran church, a col- lege, and four convents. The inhabitants carry on fome commerce in leather, wool, and wine : here is a manufac- ture of fire-arms, and a particular kind of fnfil, called, from the town, Tefchins ; 26 miles S.E. of Ratibor. N. lat. 49^43'. E. long. 18° 41'. TESCHENAU, or Teschna, a town of Bohemia, in the circle of Bechin ; 8 miles E. of Sobieflaw. TESCHONOVITZ, a town of Pruffia, in Oberland ; 18 miles E.S.E. of Ortelfberg. TESCUCO. See Tezcuco. TESCYLETIUM, in Ancient Geography, a town of Italy, on the coaft of Magna Graecia, between the temple of T E S T E S of the Laciiiian Juno and the town of Locri, according to Diodorus Siculus. TESE, in Geography. See Test. TESEGDELT, a town of Morocco, fituated on a (harp rock, fuppofed to be impregnable ; 80 miles W.N.W. of Morocco. TESENI, a town of Afiatic Turkey, in Natolia ; 34 miles S.E. of Degnizlu. TESEREN, a town of Africa, in the country of Ta- filet ; 50 miles N.N.W. of Tafilet. TESHOO-LOOMBOO, or LuBnoNG,the refidence of the Tefhoo Lama, and the capital of that part of Thibet immediately fubjeA to his authority, is fituated in N. lat. 29° 4' 20". E. long. 89° 7'. It is a large monaftery, con- fining of three or four hundred houfes, tlic habitations of the Gylongs, or priefts, befides temples, maufoleums, and the palace of the fovereign pontiff ; in which is comprifed alfo the refidence of the regent, and of all the fubordinate officers, both ecclefiaftical and civil, belonging to the court. It is Included within the hollow form of a high rock, and has a foothern afpedt. Its buildings are all of (lone, none lefs than two ftories high, flat-roofed, and crowned with a parapet rifing confiderably above the roof, compofed of heath and bru(h-wood, inferted between frames of timber, which form a ledge below, and are fafhioned above into a cornice, capped with mafonry. The building is ftained of a deep garnet-colour ; a cuftom univerfally adopted in thefe regions, for diftinguifhing places of religious efta- bhfhment, and which, when contrafted with the white walls, produces, in the appearance of their town, a very pleafing effeft. All the houfes have windows, the centre, or princi- pal one, projefting beyond the walls, and forming a balcony : they are clofed with black mohair curtains inftead of (but- ters. The principal apartment in the upper ftory has an opening over it, covered with a moveable (hed, which ferves the purpofe of fometimes admitting light and air, and in the winter fealon, occafionally, the grateful warmth of the fun. The tops of the walls are adorned with cylindrical monu- ments ; fome of which are plain, covered with black cloth, crolfed by a white fillet ; while others are made of copper^ burnifhed with gold : as the palace and maufoleums are thus adorned with profufion, the view of the monafterv, on ap- proaching it from the plain, is brilliant and fplendid. The plain of Tefhoo-Loomboo, v?hich is perfeftly level, is en- conipafTed by rocky hills : its length is about fifteen miles, and its fouthern extremity, from E. to W., is five or fix miles broad. The rock, upon the fouthern face of which the monaftery is fituated, nearly occupies the v/hole width of the valley, and approaches fo near to the hills, as to form a nar- row defile, leaving room only for a road, and the bed of the river Painom-tchieu, which runs through it, and at a fmall diftance joins the Burhampooter. A fortrefs commands the pafs. The rock of Tefhoo-Loombco is the loftieft of all that are in its vicinity ; and the monaftery near its bafe is thus guarded from the violence of the N.W. winds. From the fummit of this rock the eye commands a very extenfive profpeft, and the moft interefting objieft in view is the cele- brated river Burhampooter, called in the language of Thi- bet Erechoomboo. Here it receives the tributary waters of the Painom-tchieu. Turner's Tibet. TESI TRAMONTINI, Vittoria, in Biography, one of the moft renowned female fingers that Italy has produced. She was born at Florence in 1690 ; began her vocal ftudies under the maeftro di cappella Francefco Redi ; then went to Bologna, and became a pupil of Campcggi ; and received her laft polifh from Bernacchi. But fhe was no lefs admired \0L. XXXV. for the dignity, grace, and propriety of her aftion, than her vocal i)Owers. Quant/., who heard her at Drcfden in i 7 19, in the famous opera that was performed on occafion of the nuptials of the prince royal of Poland, fing with Senefino, the Bcrfelli, wife of Lotti, Dnreftantc, and the Fauftina, charafterizcs her in the following mafterly manner. " Vittoria Tcfi had by nature a mafculine, ftrong, con- tralto voice. In 17 19 flie generally fung, at Drcfden aW olliiva, fuch airs as are made for bafe voices ; but after- wards, befides the majcflic and fcrious ftyle, (he had occa- fionally fomething coquettifh in her manner, which was very pleafing. The compafs of her voice was fo extraordinary, that neither to fing high nor low gave her trouble. She wak not remarkable for her performance of rapid and difficult paffages ; but fhe fccmcd born to captivate every fpcftator by her aftion, principally in male parts, which (he performed in a moft natural and intelligent manner." Life of Quantz, written by himfelf. She fung at Naples in 1725, and at Vienna in 1748, where fhe remained till the time of her deceafe, in 1775, at 85 years of age. She was the miftrefs of the Teubcrinn and the De Amicis, both as juftly famed for their a£ling as finging. We were told at Vienna in 1772, that fhe had long quitted the ftagc, though the remembrance of her talents was fo deeply impreifed in the minds of many excellent judges, that whenever fhe was mentioned, it was to the difadvantage of all fubfequent female fingers. She had been very fprightly in her day, and yet was in high favour with the emprefs-queen in her latter years. Her ftory is fomewhat Angular. She was connefted with a certain count, a man of great quality and diftinftion, whofe fondncfs increafed by pofTefTion to fuch a degree as to determine him to marry her : a much more uncommon rcfolution in a perfon of high birth on the continent, than in England. She tried to diffnade him ; enumerated all the bad coiifcqucnces of fuch an alhance ; but he would liften to no reafoning, nor take any denial. Find- ing all remonftrances vain, (he left him one morning, went into a neighbouring ftreet, and addreffing herfelf to a poor labouring man, a journeyman baker, faid fhe would give him fifty ducats if he would marry her ; not with a view to their cohabiting together, but to ferve a prcfcnt purpofe. The poor man readily confented to become her nominal hufband : accordingly they were formally married ; and when the count renewfed his fohcitations, ftie told him it was now utterly im- pofTible to grant his requeft, for fhe was already the wife of another ; a facrifice file had made to his fame and family. Since that time (he had lived many years with a man of great rank at Vienna, of nearly her own age ; probably in a very chafte and innocent manner. TESIA, in Geography, a town of New Mexico, in the province of Mayo ; 45 miles E.S.E. of Santa Cruz. TESIN, a town of Syria, celebrated for its ohve oil ; 18 miles N.E. of Antioch. TESINO, a department of Italy, formed of the Pavefe. It contains 156,471 inhabitants, who eleft twelve deputies. Pavia is the capital. — Alfo, a river of Italy, which rifes in mount St. Gothard, and paffing through lake Maggiora, empties itfelf into the Po, at Pavia. Tesino, or Tejftn, a town of the county of Tyrol ; 24 miles N.E. of Trent. TESKELA, a town of Finland ; 70 miles E. of Biorneborg. TESKOWA, a town of Poland, in Volhynia ; 40 miles E. of Lucko. 3 C TESORO, T E S TESORO, a fmall idand in the Spamft Main, near the coaft of South America. N. lat. io° 8'. W. long. 75° 46'. r ,,- ■ .u • TESPIS, in ylncifnt Geography, a town of Afia, in the ni- terior of Carmania, and near Carmana. Ptolemy. TESS, in Geography, ?^T\ser of Moravia, which runs into the Marfch, 8 miles N. of Muglitz. TESSAILAH, a town of Algiers ; 20 miles 6. ot Oran. TESSALON. See Tiiessalon. TESSARACONTA, Tsj-TOpaxo.™, among the Athe- nians, were forty men who went their circuits round the fe- veral 'boroughs, and had cognizance of all controvedies about money, if not above ten drachms ; as alfo of aftions of aflault and battery. Potter, Archiol. Grsec. TESSARACONTERIS, in the Naval ^rchlleaure of the Ancients, a word uTed toexprefs a fort of galley, in which there were no lefs than forty tiers of rowers one above an- other. Se Enneris and Polycrota. TESSARA-COSTA, in our Ancient Writers. See Quadragesima. TESSARACOSTON, r-wapaxoro., in ^«/;>%, a fo- lemnity kept by women on the fortieth day after child-birth, when they went to the temple, and paid fome grateful ac- knowledgments for their fafe delivery. Pott. Archxol. Graec. torn. i. p. 432. and tom ii. p. 335. TESSARINI, Carlo, in Biography, firft violin, and leader of the band in the metropohtan church at Urbino, was born at Rimini in 1 690 ; he was a fpirited performer on his inftrument, and a very voluminous compofer. His ftyle was light and flimfy, compared with that of Corelli and Gemi- niani ; but his concertos not being very difficult, were much played in country concerts in our own memory, with thole of Albert], Albinoni, and Vivaldi. Teflarini's firft publication at Amfterdam has a title-page of great promife ; but whether the promife was ever per- formed, fceptics in thefe incredulous days \»ill be much in- clined to doubt. The title is in French, but Hterally tranf- lated, is the following : " A new Method for learning theo- retically, in a Month's Time, to play on the Viohn, divided into three Clafles, with progreffive LefTons for two Viohns." Then twelve violin concertos ; twelve flute folos ; the maf- ter and fcholars ; divertimenti for two violins ; twelve violin folos ; fix divertimenti for two violins, in canon, &c. &c. He lived till the year 1672, in the perpetual labour of pub- lication ; but his produftions would now be as difficult to find as thofe of Timotheus and Olympus. TESSE, in Geography, a town of France, in the depart- ment of the Sarte ; 15 miles S.W. of Le Mans. TESSELiE, a word ufed in Pharmacy, to exprefs lozenges cut into regular figures. TESSELARH, among the Romans, artificers of che- quered or mofaic work. TESSELATED Pavement, pavimentum tejfelatum, a rich pavement of mofaic work, made of curious fmall fquare marbles, bricks, or tiles, called tejfelh, from the form of dies. Teflelated pavements were much ufed in the tents of the Roman generals. TESSERA, in Roman Antiquity, denoted in its primary fenfe a cube or dye ; fo called from the Greek word rscj-o-apa, or TEo-a-epa, four ; refpeft being had to its number of fides, diftinft from the two horizontal planes, above and below. And it was thus diftinguifhed from the talus, which, being round at each end, contained only four planes or faces on which it could ftand ; and therefore, when thrown, had no 4 T E S more than two fide faces in view. Hence ludere talis et ludere tejferis are fpoken of by Roman writers as two different games. The fyllable tes. occurs often in Roman infcrip- tions. The word tejfera was applied to many other things, not fo much from a fimihtude in the figure, as from the relation they bore to fome other thing of which they were the figu or token ; as tlie points on the upper plane of the dye de- noted the good or ill fuccefs of the call. The tejfera hofpitalis was either public or private. As to the former, we find among the infcriptions publilhsd by Gruter, inftances of two municipal towns which put them- felves under the patronage of the Roman governor ; and the reciprocal engagements between them, engraved on two copper-plates in the form of an oblong fquare, with a pedi- ment at the top, is called in both tejfera hofpitalis. The defign of the latter was to cultivate or maintain a lafting friendftiip between private perfons and their families ; and gave a mutual claim to the contrafting parties, and their defcendants, of a reception and kind treatment at each other's houfes, as occafion offered. For which end thofe teffers were fo contrived, as beft to preferve the memory of that tranfaftion to pofterity. And one method of doing this was by dividing one of them lengthwife into two equal parts, upon each of which one of the parties wrote his name, and interchanged it with the other. From this cuftom came the prevailing expreffion tejferam hofpitalem confringere, ap- plied to perfons who violated their engagements. The tejfera frumentariit were fmall tallies given by the em- perors to the populace of Rome, entitling them to the re- ception of a quantity of corn from the public at ftated feafons. The perfon who had the infpeftion of thefe was called tejferarius. They were made of wood and of ftone. There was another kind of teffera which intitled perfons to a fight of the public games and other diverfions, ufually made in the form of an oblong fquare. The tejfera militaris was a fignal given by the general, or chief commander of an army, as a direftion to the loldiers for executing any duty or fervice required of them. This, upon urgent occafions, was only vocal ; but, in ordinary cafes, it was written on a tablet, commonly made of wood. Befide the civil and mihtary tefferae, there are others which related to religious affairs, and may be called facrcd. Phil. Tranf. vol. xlv. art. 12. TESSERMUIT, in Geography, an ifland near the S.W. coaft of Eaft Greenland. N. lat. 59° 59'. W. long. 44"^ 20'. TESSET, a town and diftrid of Africa, in the country of Sahara ; 170 miles S. of Morocco. N. lat. 15° 24'. W. long. 7°. TESSIN, Charles Gustavus, in Biography, a Swedith count and confiderable ftatefman, was born at Stockholm in 1695, and received the rudiments of his education under his father. In 1 7 1 4 he fet out on his travels, and continued them through various countries of Europe for five years, availing himfelf of every opportunity that occurred of acquainting himfelf with their refpeftive conftitution and laws. At the age of twenty-five he was deputed to the courts of Great Britain, Denmark, and France, and alfo to the States of Hol- land, to announce the acceflion of Frederic I. to the Swedifh throne; and in 1725 he was fent to Vienna, to folicit the attention of that court to the new treaty of alliance between Sweden and Ruffia. On the death of his father, in 1728, he fucceeded him as principal intendant of the court, and in order to qualify himfelf for the office, he undertook a new tour at liis own expence. In 1735 he was again difpatched to T E S T E S to tlie court of Vienna, where he remained two years. He ■was chofcii by the iiobihty fpeaker at the famous diet of 1738, on which occafion he obtained, in recompence of liis conduct, a gold medal, bearing on one fide his crell, and on the other the motto " Confcius Refti." He was appointed in 1739 to conduAan embaily from this diet to France, and refided at Paris till the year 1742, concluding during this interval an advantageous treaty of commerce with the king of the^Two Sicilies, and terminating a fubfidiary treaty of al- liance with France, by which Sweden was to receive in the courfe of three years 27 tons of gold. In 1743 l>e was fent to Denmark, and in the following year to Berlin, on bufi- nefs of great importance. At Berlin he was honoured with the Prulhan order of the Black Eagle. He occupied ieveral other ftations of dignity and truft, the duties of which he difcharged with Angular wifdom and fidelity. But the moft important office alTigned him, was that of preceptor to the crown prince, Guftavus HI., to which he was appointed in 1747. On this occafion he wrote his " Letters addreffed to a Young Prince," for the ufe of his royal pupil, which were afterwards tranflated into moft of the languages of Europe. Retiring from public bufinefs in 1 76 1, he lived on his eftate till the time of his death, which happened in January 1770. Count Teffin was a zealous patriot and enlightened citizen, and a diftinguifhed patron of letters. With a view of encouraging the arts and fciences, he made a great collcdtion of books, piftures, drawings, coins, and other curiofities. But notwithftanding his various excellent qualities, his enemies were affiduous in fruitlefs attempts to throw a {hade over his charafter, as may be feen in a work entitled, " An Hiftorical Account of the State of Sweden under Frederic I," Gen. Biog. Tessin, in Geography, a town of the duchy of Mecklen- burg ; 18 miles S.E. of Roftock. TESSIURSAK, an ifland near the W. coaft of Weft Greenland. N. lat. 61° 10'. W. long. 47° 30'. TESSOUA, aconfiderable town of Africa, in the coun- try of Fezzan ; 100 miles E.S.E. of Mourzouk. Near this town, a river, now overwhelmed by the moving fands, but formerly a deep and rapid ftream, had its courfe. TES80UELLE, a town of France, in the department of the Mayne and Loire ; 5 miles S. of Chollet. TESSUA, a town of Hindooftan, in Rohilcund ; l8 miles S.S.E. of Bereilly. TESSUE, a town of Perfia, in the province of Adir- beitzan ; 50 miles W. of Tauris. TESSUNTEE,' a town of the ftate of Georgia ; 80 miles W. of Tugeloo. TESSUT. See Teceut. TESSY, a town of France, in the department of the Channel ; g miles S. of St. Lo. TEST, in Metallurgy, is a veflel of the nature of a cop- pel, ufed for large quantities of metals at once, and formed of the fame materials. The coppels, or fmall vefTels, ferve for operations of this kind, when fmall quantities only are concerned ; but when larger are worked on, veflels of a larger fize and coarfer texture are employed, which are diftinguifhed by the name of tejls. 1 hefe are ufually a foot and half broad, and are made of wood-aflies, not prepared with fo much care as for coppel- making, and mixed with finely powdered brick-duft ; thefe are made into the proper (hape, either by means of a (hallow veflel, made of crucible earth, or caft-iron, of proper dimcn- fions, or only an iron ring, or hoop, with three bars arched downwards acrofs the bottom, about two inches deep, and of different widths, from three or four inches to fifteen or more, according to the quantity of metal to be teftcd at once. To make them in the firll manner, an earthen veffcl is to be procured, not glazed within, and by its dcptli and breadth proportioned to the quantity of metal to be worked ; the infide of tins veffcl is to be well moiftcned with fair wa- ter, that tlie allies to be put into it may adhere the better. Put into this velRl, thus prepared, the aflies and brick-duft before-mentioned, ajul firll moiilened either with water alone, or witii water with a little white of an egg mixed in it ; let the quantity of this be fo much as will h.-ilf fill the veffel, then prefs the niafa witii a wooden indented peiUe, or, if not for a very large tell, with a wooden cylinder, only of an inch thick : when thus preil'ed down add frefli afhcs, and prefs them a fecond time, as in the making of coppels, and re- peat this addition of frefh afhcs till the earthen velTcl be nearly full ; then remove the fuperfluous afhcs witli an iron ruler, and let the inequahties remaining at the border be fmoothed with a wooden or glafs ball rolled round about. This done, you are to cut the cavity with a bowed iron, that you may have a broad fpherical fegment, not very deep ; and laftly, Ijy means of a lievc, ftrew this cavity carefully and regularly over with dry allies of bones of animals, ground extremcJy fine, and fqueezc tliefc hard in, by the rotation of the wooden or glafs ball. Thus you have a teft finilhcd, which, together with its earthen pot, muft be fet in a dry warm place. To make the lefts in the other manner, or by means of an iron ring ; let a ring of that metal be filled with afhes mixed with brick-duft, and moiftencd as before mentioned, in fuch manner that they may rife confiderably above the ring'; then prefs them ftrongly either with your hands, or with an indented peftle, and afterwards, with gentle blows of a rammer, prefs the afhes from the circumference toward the centre, in a fpiral hne, and that in fuch manner, that, after having been fufficiently prefled, they may be a fmall matter higher than the brink of the ring. If there are now any vacancies in the mafs, empty the ring, and fill it again with more afhes ; for if you fhould attempt to fill up thefe by adding, were it but ever fo little, afhes, the fecond, or additional quantities, will never cohere fo firmly with the firft, but that they may probably fjeparate in the operation. This done, turn the ring upfide down, and on the other fide, or bottom, take out the afhes to the quantity of one- third part of the depth of the ring, and again fill the va- cuity with the fame afhes, in fuch a manner that there may remain no fenfible cavity. When the mafs is thus prepared, cut out a cavity in the larger furface of the ring, with a bowed iron, as in the former method. The Germans have, befide thefe, another kind of tefts, which they call tre'tbfcherben. Thefe are a fort of veffcls which refill the moft violent fire, and are fo extremely com- paft, that they fometimes will retain not only melted metals, but even the glafs of lead itlelf. The figure and fize of thefe vefTels may be the fame with that of the coppel, but they arc ufually made larger ; and the great difference of thefe tefts from coppels, and from the ordinary tefts, which are indeed only a kind of large and coarfe coppels, is, that the matter of thefe is more compaft and coherent. The matter for making thefe tefts is thus prepared : take of the pureft and fineft clay a fufficient quantity, make it into balls, and dry them either in the air, or on the fire ; when dried, beat them to powder in a mortar, and pour on the powder a gieat quantity of warm water ; let this mix- ture reft a while, and when the clay has fubfided, pour off 3 C 2 the TEST. the water wliich fwims at top J and let this walhuig be fo often repeated, that all the moft minute lumps of the clay bo broken, and whatever fait it contains perfeftly vvafhed out : then add to this fine clay, of the pureft fand, of pow- der of calcined flints, ground, and well walhed, of faulty but clean Heffian crucibles, or of any mcombuftible ftoncs ground very line, fuch a quantity as wnll render the mais thick, and hardly adhering to the hands in kneadmg it, or pliant when rolled into a thin lamina. This is the matter for making this fort of tefts ; but, be- fore any quantity of the velTels be made of this earth, it will be prudent firft to finilh a fingle one, and try it, by putting on it a quantity of glafs of lead, and expofing it for an hour or more to the ftrongeft fire ; by this trial you will be cer- tain whether or not the mat's is capable of making veflels that will refift both the fire and the glafs of lead ; and by no other means but this trial is it poffible to determine the due proportion of the mixture of the ingredients for this ufe, on account of the variety of the clays. Nature in fome places affords a clay fo well tempered, that it is extremely proper for the making of tefts without any preparation, or without the admixture of any other matter. Sometimes this only requires a (imple walhing, but commonly it is ne- cetrary to make it into balls, and powder or wafh them as before direfted. On the trial of a teft made of this, or the former mixed clay, if it runs into glafs, you mull add to it of the powder of Hones, efpecially fuch as beft relifts the fire. Great care is to be taken not to add too much powdered chalk to thele compofitions, fince if the matter is tempered with that alone, the tefts will indeed refift the fire very well, but being too porous, they will yield a paffage to litharge, which will foften them to fuch a degree, that they will either fall afun- der of themfelves, or be totally cruftied when taken hold of with the tongs. Thefe veflels are to be made in the following manner : rub over the fides and bottom of a fmall mortar, and alfo its peflle, with oil, or with the fat of bacon ; fill it two- thirds full of prepared clay, then make a (light impi-eflion with your fingers in the middle of the clay ; then place the bottom of the peftle there, and force it down with blows of a hammer, the ftronger the better. When thus properly hollowed, take it out of the mortar, and pare its edges, and dry it, as the coppek are dried, in the air, in a dry warm place. Tefts thus prepared may be ufed as foon as dry, unlefs for falts or litharge ; but thefe bodies, when melted in vcffels not firft^ baked or hardened in the fire, always make their way through them. Some of the German writers alfo recommend, both for tefts and coppels, a fort of friable opaque ftone, called white fpath, which appears to be a fpecies of gypfum, or of the ftones from which plafter of Paris is prepared. The fpath is direfted to be calcined with a gentle fire, in a covered veffel, till the flight crackling, which happens at firft, has ceafed, and the ftone has fallen in part into powder ; the whole is then reduced into fubtle powder, which is paffed through a fine fieve, and raoiftened with fo much of a weak folution of green vitriol, as is fufficient for making it hold together. Gellert, however, finds, that if the ftone is of the proper kind, which can be known only by trials, calcination is not neceffary. Thefe tefts are liable to foften or fall afunder in the fire, which inconvenience may be remedied, according to Scheffer, by mixing with the uncal- cined ftones fomewhat lefs than equal its weight, as eio-ht- njnths of fuch as had been already ufed and penetrated by the fcoria of the lead, taking that part of the old teft which appears of a green-grey colour, and rejefting the red crull on the top. But from his account it appears, that thefe tefts are lefs durable than thofe made of the alhes of bones, though much fuperior to thofe of wood-afties. Vegetable afltes, which Hand pretty well tlie tefting of illver, can fcarcely bear any great quantity of gold, which requires a confiderably ftronger fire than the other ; but bone-aflies, fays Dr. Lewis, anfwer fo effeftually, and are among us fo eafily procured, that it is uiineccflary for the refiner to fearch for any other materials. Cramer's Art of Allaying, p. 6o. 62. Lewis's Com. Ph. Tech. p. 144. TEST-Z./yuor, a term ufed by our dealers in brandies, &c. for a liquor which they ufe as a teft of brandy, &c. to prove whether they be genuine, or mixed with home fpirit. The people who ule this, place great confidence in it, but it is really a very vague and uncertain thing. They pretend that this liquor will /hew, by the colour which it makes on its being poured into brandy, whether it be genuine or adulterated ; or if not genuine, in what proportion the adulterating fpirit is mixed with it. The whole faft is this : if a little common green or white vitriol be diflblved in fome fair water, it makes a teft-liquor, a few drops of which being let fall into a glafs of old French brandy, will turn the whole to a purple or fine violet-colour ; and by the ftrength or palenefs of this colour, the dealers judge the brandy to be genuine or mixed in different propor- tions, with home fpirits. Old French brandy, having long lain in the cafk, takes a dilute tinfture of the wood of the cafk, that is, of oak ; and this being of the fame nature with a folution or tincture of galls, naturally turns blueifh or blackifh with vitriol. A new diftilled brandy, though wholly foreign, would not give this teft ; and a common malt fpirit, with oak chips infufed in it, will turn as dark as the fineft brandy. While our diftillers, indeed, had nothing in ufe for the colouring of their fpirits but burnt fugar, it was poffible to make tome guefs at an adulteration with them, becaufe the brandy, in this cafe, would not become blackifh in proportion to its former colour ; the fugar colour not turning to ink with the vitriol, like the other : but our diftillers have fince found a way of ufing an extraft of oak for the colouring of their fpirits, and fince that, this teft-hquor is of very little ufe, our common fpirits, of any kind, turning as deep with it as the foreign brandies. The very beft way of making this teft-liquor, is with a c.ilcined vitriol of iron, diffolved in a dilute or aqueous mineral acid. The liquor, when well made in this manner, is of a fine yellow colour, and will give, for a time, the fineft blue to any fpirituous tinfture of oak. The EngHfh were, at one time, ver/ fond of high-co- loured brandies, .and it was then that the ufe of this teft- hquor was moft efteemed ; afterwards we, as well as other nations, finding that this colour was only owing to the cadi, began to diflike, and to favour the pale brandies : at length we fell into the ufe of fuch as were wholly limpid and colourlefs, and the re-diftilling of all the old brandies of which people were poffeffed, took place ; on this the teft-liquor was fdund to be of no ufe at all, and accordingly rejefted ; but as we are of late again come into the efteem of coloured brandies, and that with great juftice, as the colour, when genuine, is a certain mark of the age of the liquor, this teft- liquor is again got into more credit than it dcferves. The famous Helvetian ftyptic depended wholly on this accident for its colour ; and it was no fmall mortification to our chemifts, when, fome years ago, it was introduced into ufe among us, that they could not make it with our own fpirits, but muft be at the expencc of true French brandy TEST. ACT. brandy for it ; our own fplrits, though equally coloured, would never make that violet lind\ure, becaufc their colour was owing to burnt fugar, not a tinfture of oak. At length this myftery was explained, and a little fcrapings of galls made all thofe quantities of this llyptic, which had been fet by as good for nothing, perfedlly fine and well- coloured. Shaw's Effay on Diftillery. TEST-y?ff, in iaw, is the ftatute 25 Car. II. cap. 2. (1673) which direfts all officers, civil and military, to take the oaths, and make the declaration againll tranfubftan- tlation, in the court of king's bench or chancery, the next term, or at the next quarter feffions, or (by fubfequent ftatutes) within fix months after their admilfion ; and alfo within tiie fame time to receive the facrament of the Lord's fupper, according to the ufage of the church of England, in fome public church, immediately after divine fervice or fermon, and to deliver into court a certificate thereof, figned by the miniiler and churchwarden, and alfo to prove the fame by two^ credible witneffes, upon forfeiture of 500/. and difability to liold the fame office. Befides this penalty, if, without taking the facramental qualification within the time prefcribcd by the aft, a perfon continues to occupy a civil office, or to hold a military commiffion, and is lawfully con- vifted, tlien he is difabled from thenceforth, for ever, from bringing any aftion in courfe of law, from profecuting any fuit in any court of equity, from being guardian of any child, or executor or adminillrator of any perfon, as well as from receiving any legacy. For an account of the nature and operation of the Corporation AB, we refer to that article. The word tejl fignifies proof or trial, being formed of iejlis, iLHtneJs ; this aft being ellabliffied with a view to exclude Roman Catholics from any fhare in the government, though it has operated to the exclufion of Proteilant diflenters in general. The Corporation aft, enafted in the year 1661, the 13th of Charles II., was principally, but not wholly, defigned againft Proteftant Nou-conformifts. It was pafled in a period of great heat and violence, the year after the Reftoration ; and it paved the way for the aft of unifor- mity, which foon after pafled. The king, with his minifters, and the majority in both houfes, hated the Prefbyterians, whom they confidered, whether jullly or not, as the authors of the late rebellion. Great power ftill remained in their hands, for, during the Proteftorate, they had been appointed magiftrates in all the country towns. To leave authority in Uich hands feemed dangerous : it was therefore judged expedient to regulate the corporations, and to expel thofe magiftrates, whofe principles were inimical to the conftitu- tion, civil and ecclefiaftical. This gave rife to the Corpo- ration aft. The facramental claufe, however, in the Cor- poration aft was intended againll the Catholics ; for, as the other provifions of the ftatute, by difpoffeffing the enemies of the court, had eftabliftied the influence of the crown in all the corporations of the kingdom, the parliament was apprehenfive that in the next reign, under a Catholic king, all corporation offices would be filled with Catholics. Befides, before the paffing of the aft of uniformity, thofe that were afterwards called diffenters, were within the inclofure of the church, and confequently participated in her facraments, fo that the facramental claufe muft there- fore have been intended as a guard againft the Cathohcs, to whom it effeftuaUy applied, and not as a guard againft thofe who were afterwards called diflenters, on whom, at that period, it could not operate. It muft alfo be allowed, that the original defign of the teft was not fo much to exclude the Proteftant diflijnters, as the papifts, as the Catholics were then called. It was brought in by the patriots, in the reign of Charles II., under their apprehrnfion of poprry, and a popifli fuccenbr ; and when, during the debate in the houfc of commons, it was obferved, that it was drawn in fuch a manner as to com- prehend the Proteftant diflenters, the court greatly endea- voured to avail themfelvcs of that circumftance in order to defeat the bill. But the diflenting members difappointcd them, by declaring, that they had rather confide in tlie jufticc and generofity of parliament, to pafs fome future bill in their favour, than be the occafion of retarding or de- feating the fecurity, which the i)refent bill was calculated to aff'ord- to the liberties of their country. Their patriotifm produced, foon afterwards, a bill for their relief from the pen.il laws ; but the parliamer.t was prorogued, through the refentment of the court, to prevent its palling : and when, notwithftandlng this, a bill in favour of the diflenters did afterwards pafs both houfes, vi-z,. in the year 1680, and lay ready for the royal aflent, the court ventured upon a very extraordinary expedient : the clerk of the crown was ordered to convey away the bill, and, atJcordingly, it waa never afterwards to be found. The p.irlicular telt of re- ceiving the facrament acconiing to the rites of the church of England, was calculated to exclude the papiits rather than the Proteftant diflinters ; as it was no uncommon thing for the latter, at that time, to receive the facrament occafionally in the church of England, in order to exprefs their charity towards it, as a part of the church of Chrift. If it had been the defign of tlie legiflature to exclude all from civil offices but thofe who have a real aft'eftion for the conftitution and worftiip of the church, it is apprehended they would have appointed the tcil to be, not merely once taking the facrament at church, but a ftated and conftant conformity to its religious fervices. It has been alleged, however, that though the Teft aft was defigned againft the Cathohcs, yet that few, even then, of the number, merited a treatment fo fevere. They, it is faid by their advocates, had no concern in the views of Charles or his brother, in the fchemes of wild minifters, or in the machinations of bad politicians. They had fuffi?red much in the rcyal caufe, and were pining in penury and diftrefs, under the additional prefl'ure of cruel laws. But whatever might be the reafons, real or pretended, for paffing an aft, of which Catholics were the principal often- fible objefts, the cafe is now very much altered, and Catholics have afl^umed a new charaftcr, which entitles them, in the judgment of many, not merely to proteftion, but to a participation of the privileges of their fellow-fubjefts. As the queftion concerning the repeal of the difqualifying laws which we have already mentioned, has beeEi, and is likely foon again to become a fubjeft of public difcuffion, and as it is a fubjeft, generally confidered, of great im- portance and intercft, it may not be thought improper to ftate the arguments for and againft the repeal of thofe ex- cluding ftatutes, comprehending both Proteftant diflenters and Cathohcs, in as concife a manner as poffible. The general principles upon which the equitable decifion of this queftion depends, are fuch as follow : — Every man has an undoubted right to judge for himfelf in matters of rehgion ; nor (hould any mark of infamy, or any civil penalty, be at- tached to the cxcrcife of this right : — Every man has a right to the common privileges of the fociety in which he lives ; and among thefe common privileges, a capacity 1 law for ferving his fovereign and country is one of the moft valuable, diftinguifliing a legal capacity of fervice, from a right to an aftual appointment, which depends upon the choice of his fovereign, or of his fellow citizens ; and this capacity of ferving the ftate is a right of fuch high cftima- tion, and of fuch tranfcendcnt value, that e.xclufion from it is TEST-ACT. is deemed a proper punifliment for fome of the greateft crimes :— Aaions, and not opinions, political or religious, are the proper objeAs of human authority and cognizance :— No man, who does not forfeit tliat capacity of ferving his fovercign and country, which is his natural right, as well as the honour and emoluments that may happen to be conneaed with it, by overt-ads, ought to be deprived of them ; and difabili- ties that are not thus incurred are unjuil penalties, implying both difgrace and privation :— Punilhmeiit, without the pre- vious proof of guilt, cannot be denied to be an injury ; and injuries infliSed on account of rehgion arc undoubtedly perfecutions : — The ends of civil fociety can never juftify any abridgment of natural rights that is not cffential to thefe ends : — The inftitutions of religion, and the ordinances of civil government, are diftinft in their origin and their objeds, in the fanAions that enforce them, and the mode in which they are adminiftered : — The inftitution of the Lord's fupper, being wholly of a rehgious nature, and appointed merely as a memorial of his death, is improperly applied to the fecular ends of civil fociety ; and if it be fo applied, it is not only an improper, but in many cafes an infufficient, teft of the principles and cha- rafter of thofe to whom it is adminiftered. Such are fome of the leading principles, which have been the fubjefts of difcuffion in the debates that have occurred, both among writers and among our legidators, in confidering the expe- diency of repealing the teft laws. The cafe of the Catho- Lcs and of the Proteftant diffenters has been repeatedly argued in both houfes of parhament, and may probably again be- come the fubjeft of pubhc difcuffion. Many (indeed moft) of the fame arguments apply to both defcriptions of per- fons ; but we (hall chiefly reftridt ourfelves to the pleas of the diffenters. They have urged, that being well-affefted to his majefty and the eftabhlhed government, and ready to take the oaths required by law, and to give the fulleft proof of their loyalty, they think their fcruple to receive the facrament after the manner of the church of England, or after the manner of any church, as a qualification for an office, ought not to render them incapable of holding public employments, civil or military : they alfo allege, that the occafional receiving of the Lord's fupper as a qualification for a place, cannot, in the nature of things, imply that thofe who thus receive it, mean to declare their full and entire approbation of the whole conftitution and frame of the efta- blifhed church ; fome men may be compelled by their necef- fities, or under the allurement of fecular advantages, to do what they would not do, if they were left to their free choice. Others, perhaps, may comply with the facra- mental teft who are not even Chriftians, and who therefore cannot be fuppofed to wifti well to Chriftianity itfelf, or to any national eftablifhment of it whatfoever. Hence they are led to think, that fuch a teft can be no real or effeftual fecurity to the church of England. Conceiving that they have a right, as men, to think for themfelves in matters of re- ligion, and that this right is prefcribed and fanftioned by the Author of Chriftianity ; and that they have a right, as ctti- zau, to a common chance with their fellow-fubjefts for offices of civil and military truft, if their fovereign or fel- low-citizens ftiould tliink them worthy of confidence ; they cannot be of opinion that any of the ends or objefts of civil fociety require that thefe rights (hould be fupcrfeded, and that they (hould be excluded from the fervice of the ftate. Their advocates plead on their behalf, that the continuance of thofe afts which invade their rights is fo far from being neceffary to the well-being of the ftate, or to the eftabhfliment of the national church, that they are actually pernicious both to the ftate and church, and ought to be repealed. Their in- utility is (liewn by referring to the higher truft of legiljativc authority, to which the dilTenters are admitted without hefi- tation or referve, and without fubmitting to any fuch teft. An excifeman furely, it is faid, does not fuilain a more im- portant office, neither is it neceffary that he fhould make a profeffion of his Chriftian faith more than a member of the houfe of commons or the houfe of peers. The principles of the diffenters, their attachment to the cor-ftitution, and their zeal in fupport of it, have been fufficiently manifefted in a variety of inftances, from the Revolution to the prefent day ; and yet can it be afferted, that their exclufion from the fervice of the public is neceffary or beneficial to the ftate J Can it be faid that the contiKUance of the difabilities to which their profeffion fubjefts them, is neceffary for the fafety or honour of the church ? The eftabli(hment of a church re- quires a legal provifion for its minifters ; but it does not re- quire for its laity an exclufive right to civil and militai-y trufts. The eftablifhment of the church of England coa- fifts in her tithes, her prebendaries, her canonries, her arch- deaconries, her deaneries, and her biftioprics. Thefe confti- tuted her eftablifhment before the Corporation and Teft afts had any exiftence : and they will equally conftitute her eftablifhment if thefe afts (liould be repealed. In Scotland they have had no fuch afts ; and yet Scotland has an efta- blilhed church. In Ireland thefe ads have been repealed ; and yet the eftablinied church of Ireland remains. In Hol- land, Ruffia, Pruffia, Germany, &c. they have no fuch afts. As to the intimate and beneficial connection between church and ftate, on which fome have grounded the fuppofed pro- priety and neceffity of thefe laws, it would be fnfficient to refer to the authority of archdeacon Palcy, who has ftated what ought to be the fingle end of church eftablifhments. (See Religion.) LTpon an appeal to hiftory, it has been argued that the civil government maintained itfelf in former times, when unccnneded with the church ; and the dif- turbances which terminated in the ruin of both church and ftate, are faid to have originated in the intolerant fpirit and arbitrai'y proceedings of iome ecclefiaftics, who had them- felves exercifed powers, and had inftigated their unhappy fovereign to aftions and claims at leaft as contrary to, and fubverfive of, the true fpirit of the conftitution, as any of thofe violences of the times immediately fucceeding, which have been fo juftly reprobated. In this connedion, we may refer to the fpeech of an able advocate for the repeal of the difabHng ftatutes : who maintains that no human govern- ment has a right to inquire into men's private opinions, to prefume that it knows them, or to ad on that prefumption. Men fhould be tried by their adions, not by their opinions. This, if true with refped to political, was more peculiarly fo with regard to religious opinions. In the pofition, faid Mr. Fox, that the adions of men, and not their opinions, were the proper objeds of legiflation, he was fupported by the general tenor of the laws of the land. Hiliory, how- ever, afforded one glaring exception in the cafe of the Roman Catholics. The Roman Catholics, or rather the Papifts, as they were then properly denominated, had been fuppofed by our anceftors to entertain opinions that might lead to mifchief in the ftate. But it was not their rehgious opinions that were feared. Their acknowledging a foreign autho- rity paramount to that of the legiflature ; their acknowledg- ing a title to the crown fuperior to that conferred by the voice of the people ; their pohtical opinions, which they were fuppofed to attach to their religious creed, were dreaded, and juftly dreaded, as inimical to the conftitution. Laws therefore were enaded to guard againft the pernicious tendency of their pohtical, not of their religious, opinions ; and the principle thus adopted, if not founded on juftice, was TEST. ACT. V»as at lealt followed up with conliltcucy. Tlioir influence in the ftate was feared, and they were not only reftriAcd From liolding offices of power or truft, but rendered inca- pable of purchafing lands, or acquiring influence of any kind. But if the Roman Catholics of thofe times were Papifts in the ilrie^ell fenfe of the word, and not the Roman Catholics of the prefent day, iUU he would fay, that the legiflature ought not to have afted againil them, till they put in praftice iome of the dangerous doftrines which they were thought to entertain. Difability and punifliment ought to have followed, not to have anticipated, offence. Thofe who attempted to juftify the diiabilities impofed on the difTenters, muft contend, if they ai-gued fairly on their own ground, not that their religious opinions were inimical to the eftablifhed church, but that their political opinions were inimical to the conllitution. If they failed to prove this, to deprive the difTenters of any civil or political ad- vantage, waa a manifett injuftice ; for it was not fufficient to fay to any fet of men, we apprehend certain dangers from your opinions, we have wifely provided a remedy againfl them, and you, who feel yourfelves aggrieved, calumniated, and profcribed, by this remedy, muft prove that our appre- henllons are ill-founded. The onus probandi lay on the other fide ; for whoever demanded that any other perion fliould be laid under a reftriftion, it was incumbent on him tirll to prove that the reftriction was neceffary to his fafety, by fome overt acl, and that the danger he apprehended was not imaginary but real. Was it ferioufly to be contended, that religion depends upon political opinions ; that it can fubiill only under tliis or that form of government ? It was an irreverend and impious opinion to maintain, that the church muff depend for fupport, on its being an engine, or ally, of the flate, and not on the evidence of its doftrines, to be found by fearching the fcriptures, and the moral elfefts it produced on the minds of thofe whom it was its duty to inftrutt. See Toleration. Mr. Pitt agreed with Mr. Fox in admitting, as a general principle, that the religious opinions of any fet of men were not to be reflrained or limited, unlefs they fhould be found likely to prove the fource of inconvenience to the ftate : nor ought the civil magillrate, in any other point of view, to interfere v/ith them ; but he maintained, that when religious opinions are fuch as may produce a civil inconvenience, the govern- ment has a right to guard againfl the probability of the civil inconvenience being produced ; nor ought they to wait till, by being carried into afticn, the inconvenience has aftually arifen. It was not therefore on the ground that the dif- fenters would do any thing to affeft the civil government of the country , that they had been excluded from civil offices, but that if they had any additional degree of power in tlieir hands, they might. On the other hand it has been pleaded, that to reftrain men's civil rights from the fuppofed tendency of their opinions, is a very dangerous principle, as it muft render their condition precarious and wholly dependent on the pre- judices and will of the magiftrate, and warranted unlimited reftraint, and almofl every f'pecies of perfecution. Mr. Pitt, prcmifing that the eilablilhment of a fettled form of church and of its minifters is neceffary to the civil government of the country, fuggefts the impropriety of dif- tributing the emolumenfs and offices of the eflablifhed church among perfons who, however refpettable their cha- ra6f;ers might be, were not members of the fame com- munion ; but others fay, that the emoluments and offices of the eflablifhed church are not the objetls contended for, but thofe of the ftate, unlefs the church and ftate be abfolutely identified. He alfo fays, that thefe offices may be con- lidered as matter of favour, becaufe it is confillent with the govermiient of this country, that all oflices lliould be given at its difcretion ; and here, he fays, from the dehcatc nature of the cafe, the legiflature had thought proper to mtcrpofe, and to reftrain the fupreme magiftrate, the head of the executive authority, and limit him in his appointment to thefc offices ; but furely, as ho contends, this differed eflentially from any de- gradation, difgrace, or punifliment of the diffentcrs. Others, however, have confidered this kind of reafoning as fallacious, both in its principle, and in the inference deduced from it. Mr. Fox concurred with lord North, who, though an .advocate for the continuance of thefe difqualifying laws, bore teftimony to the principles and charafler of the dif- fentcrs, in his avowal of their fteady attachment to govern- ment ; and he added, that their religious opinions were favourable to civil liberty, and that the true principles of the conllitution had been remembered and affirmed by them, at times when they were forgotten, perhaps betrayed, by the church. See Dissenters. Mr. Fox maintained, that the Teft aft was altoge- ther inadequate to the end it had in view. The purport of it was, to proteft the eflablifhed church, by exclud- ing from office every man who did not profefs himfelf well affefted to that church. But a profeffed enemy to the hierarchy might go to the communion table, and afterwards fay, that in complying with a form, enjoined by law, he had not changed his opinion, nor, as he conceived, incurred any religious obligation whatever. There were many men, not of the eflablifhed church, to whofe ferviccs their country had a claim. Ought any fuch man to be examined, before he came into office, touching his private opinions ? Was it not fufficient that he did his duty as a good citizen ? Might he not fay, without incurring any difablility, " I am not a friend to the church of England, but I am a friend to the con- llitution, and on religious fubjefts muft be permitted to tiiink and aft as I pleafe." Ought their country to be de- prived of the benefit fhe might derive from the talents of fuch men, and his majefty prevented from difpenfmg the tavoura of the crown, except to one defcription of his fub- jetts ? But whom did the tefl exclude, the irreligious man, the man of profligate principles, or the man of no principle at all ? Quite the contrary ; to fuch men the road to power was open ; the teft excluded only the man of tender con- fcience ; the man who thought religion fo diftinft from all temporal affairs, that he held it improper to profefs any re- ligious opinion whatever, for the fake of a civil office. Was a tender confcience inconfitlent with the charafter of an honeft man ? or did a high fenfe of religion fhew that he was unfit to be trufted ? Allowing that the elf abliftied rhurch ought to be protected, it was natural to inquire what was the eflablifhed church ? Was the church of England the eftabhfhed church of Great Britain ? Certainly not : it was only the eftablifhed church of a part of it ; for, in Scotland, the kirk was as much eftablifhed by law as the church was in England. The religion of the kirk was wifely fecured, as the eftabliftied religion of Scotland, by the articles of Union ; and it was furely abfurd to fay, that a member of the kirk of Scotland, accepting an office under government, not for the fervice of England excluiivtly, but for the fer- vice of the united kingdom, ihould be obliged to conform, not to the religious eftablifhment of Scotland, in which he had been bred, but to the religious eftablifhment of England. To the argument urged in favour of the Corporation and Teft afts, founded on the apprehenfion that if they were re- pealed, the difTenters might become a majority of the peo- ple, Mr. Fox gives a brief reply, 'ci%. that if the majority of the people of England lliould ever be for the abohtion of the sftablifhcd church, then it ought to be abohllied. It has been faid, that by manifcfliiig indulgence to other fcfts, a candid TEST-ACT. andid refpcct for their opinions, and a dcf.re to promote tiial clianly and good-will, liie cllablilhed church will be Whilil a can nuitiial charily ami go moll likely to iecure its il;-.bihty and its honoiir. the cricvanccs of pcrfons of a different proteflion are re- drelfed, and they are admitted to a- participation of their civil rid.ts, the church need not fear any combination tor . f^ . ^ « • r _ .. J 1..', ,^ y-,f ito T\*»*- II li'ii* ;tn(l the hands of the clergy, who were to be the great arbitrator!! of qualification or dil'qualilication for offices, and places of power and emolument. Some have attempted to juftify the legal eftablilhment of the profanation of a religious infti- tution, by comparing it with tliofe provifions of our law which enjoin tlie fanftion of an oath ; but this argument has fapping its 'foundation, or for depriving it of its peculiar and been confidered as iuapplicable to the prefent cafe, and alto- dift inguilhing honours or emoluments. Men who are ag crieved, under a fenfe of what they conceive to be an indig- nity and iniurv, are the mod likely to manifeft hollihty againtl an eccleriallical ellabli(hment that engroffes aU civi and fecular advantages to itfelf. It has been faid, that it would conduce to the honour ot th* gether unavailing ; for though it be indeed true that the le- giflature, by compelling every petty officer of the revenue, and every coUeftor of a turnpike toll, to fwear deeply on his admiffion into office, has made the crime of perjury more common, at this time, in England, than it ever appears to have been in any other age or country : yet how does the frequent commiffion of this crime againjl law, juftify the eftablifhment of a rehgious profanation by law ? But, with- out any comment on the folly of pleading for a legiflative de- \y was"iiot uitcnded by its divine founder for the attain- bafement of religion in one way, by (liewing that the legifla- - ' •■^'■n T r i._ ofes. ture has contributed to its dcbafemciit in another, let it be aflced, what refemblance the facrament of the Lord's fupper, which is merely a religious inftitution, bears to the ceremony of an oath, which is an inftitution fo entirely political, that it anfwcrs none of the purpofcs of religion, promotes none of her interefts, forms no part of her eftablifhment, and belongs as much to the Jew, the Mahometan, and the idolater, as it does to the Chriftian. The difference, fays Mr. W. Smith, the rulers and dignitaries of the church, if they would concur in abolifhing laws which perpetuate the perverfion and profa- nation of a'religious inftitution : — an inftitutioR which cer- taiii-^ ment and promotion of any felfifli and fecular purp Here, it is maintained, if any where, a hne of feparation fhould be drawn between religious and civil policy ; nor fliould the performance of a Chriftian duty be made an indif- penfible qualification for a fecular office. The difTenters, fays a well-informed member of the legiflature (Mr. W. Smith), who, being himfelf one of them, is thoroughly ac „ ^, , - in^ _ . quainted with their principles and charafter, would equally obieft to receiving the facrament as a left in their own places between the facrament, ufed as a teft for office, and an oath, of worfhip, though many of them would not fcruple to par- as a teft of truth, is too obvious to efcape the moft carelefs take of it with their brethren of the eftablifhment, and ac- obferver. An oath was neither primarily, nor at all, an aft cording to their form, when confidered only in its true hght, as a religious duty, and an expreflion of Chriftian charity. The wrncr of this article is acquainted with feveral con- fcientious and avowed members of the eftabhfhed church, who lament this abufe of a Chriftian ordinance, and who wifh, for the purity and honour of the church to which they are attached, that the laws impofmg this teft were repealed. of worfhip ; nor, though it neceffarily fuppofed a belief in a fupreme moral governor, was it ever ufed as a teft of particular religious opinions ; the fole objeft to which it was direfted was the attainment of truth, (with refpeft either to the paft or the future,) where other means were infufficient, — an appeal to a Being who, by the fuppofition, nnift be ac- quainted with all the circumitances, and muft alfo be both at \- ti.i.i.u\> tiv-vjj i-iijui- tiii- luiiu *■ " H* ij-^ii-w •--•••.' --.- -■ J — - -J — ■-- , It would Hkewife contribute to the fatisfaftion of fcrupulous able and inclined to_ punifti falfehood in fuch cafes, as an in minifters of the eftablifhed church, to be releafed from the obligation of adminiftering the facrament, as a quahfication for office abftraftedly confidered, and more efpecially to per- fons of known licentioufnefs of principles and conduft. By the duties of his funftion, by the pofitive precepts of his religion, and by the rubrick or canons of the church, the mi- nifter is enjoined to warn from the facred table all blaf- phemers of God, all llanderers of his word, all adulterers, and all perfons of a profligate life ; and yet to thefe very per- fons, if they demand it as a qualification, he is compelled, by the Teft aft, to adminifter the facrament ; and if he refufes, a ruinous profecution for damages is the obvious and ine- vitable confequencc. On the other hand it has been faid, that if the minifler's conviftion of profligacy of conduft is fiipported by all the circumftances which oonftitute legal proof, he may lawfully refufe the facrament. The truth of this opinion is doubtful ; but it is certain, that if he fhould fail in that proof, his ruin is inevitable : and if he fhould fuc- ceed, it is almoft equally certain ; for the expences of his fuit will devour his fcanty means, and probably confign him to a prifon for his life. Allowing that any notorious evil-doer, fult added to a crime, was perfeftly well calculated to attain the propofed end, and inapplicable to any other purpofe. If, fays Mr. Fox, in concurrence with fome previous ob- fervations of Mr. Beaufoy, when a man is feen going to take the facrament, it fhould be aflced, " is this man going to make his peace with God, and to repent him of his fins ?" the anfwer fhould be, " No ; he iS only going there, becaufe he has lately received the appointment of firft lord of the trea- fury ;" can any circumftance afford a greater proof of the in- decency refulting from the praftice of fo qualifying ? Some have contended, that to grant a remiffion in favour of Scotland of the Teft and Corporation afts, would be a breach of the union ; an opinion which fuppofes, that becaufe, by the articles of union, nothing can be taken from Scotland but what was then ftipulated, therefore nothing can be given. Others fay, that as the Teft and Corporation afts are among the ftatutes which fecure the doftrines, difcipline, worfhip, and government of the eftablifhed church of England, they are therefore by the aft of union declared to be unalterable. In reply to this mode of arguing it has been obferved, that the government and difciphne, the doftrines and the wor- ofFering himfelf to receive the facrament, might be rejefted fhip of the Enghfh church, were the fameTDefore the ftatutes by the minifter, without becoming liable to any puniftiment, let it be confidered what is the fituation in which A or B, or the perfon who upon application to a minifter had been re- fufed the facrament, was placed : from that moment he had incurred the penalties of the aft, and was puniftied in a man were enafted, and would continue the fame if thofe ftatutes were repealed ; and confequently do not derive their fecu- rity from them : whereas the aft which relates to the pa- tronage of the church of Scotland, and which did feem to affeft its difcipline, was held to be no breach of the articles ner perfeftly new, unexampled, and unauthorized by the of union ; neither was that union underflood to be weakened laws of the land ; he was convifted without a trial by jury, by the fubfcquent aft, which gave a complete toleration in and was difabled from enjoying an office which his majefty, Scotland to epifcopal diffenters. in the legal exereife of his prerogative, had thought proper to When the articles of union were under the confideration confer on him ; and a perfon was thereby abfolutely put into of parliament, a propofal was made in the houfe of lords, 8 that T E S Vhat the perpetual continuance of the Ted aft ; and in the houfe of commons, tliat the perpetual continuance of the Corporation aft, fliould be declared a fundamental condi- tion of the intended union : but the motions were botii re- joftcd ; a proof that the legiflature did not mean to give to them the fame perpetual exillence as to the aft of uniformity, and to the ftatute that was paflTed in tlie thirteenth of Eh- zabcth, both of which were fpecilically named, as condi- tions of the compaft, and exprefsly declared irrevocable. It the teft and corporation laws are deemed imallerable parts of the articles of union, it follows, of courle, that every alteration in thofe laws muil be deemed a breach of the union, and that every luipenfion of thofe laws mull be con- fidered as a fulpenfion of the union. Now both thcfe afts are altered, and in part repealed, by fubfequent llatutes, and for fix months in almoft every year are wholly fufpcndcd. But who will alTert that the articles of union are dilfolved, or that their obligation on the two countries is fufpendcd for fix months in every year ? or who will deny that the fame power which alters a part may alter the whole of thofe laws ? Who will deny that the fame authority which lufpends a law for fix months, may abolifli it for ever ? In favour of the continuance of thefe laws it has been urged, that they have exilled for many years with great ad- vantage ; but many attempts have been made to difprove the advantage of them, and they have repeatedly been com- plained of as both ufelefs and unjuft. Befides, this argument for their exiftence is abfurd, as it tends to perpetuate every enormity that can plead the fanftion of age. The horror of iuHovalion may be felt or feigned as a bar to every im- provement. It ir.ay be neverthelefs aficed, how have thefe laws fubfifted i By repeated fufpenfions ; for the indemnity bills are, with few exceptions, annual afts : and where would be the impropriety of fufpending them for ever, by an ail of perpetual operation. In order to filence complaints of thefe partial and injurious laws, it has been faid that the aft of indemnity, annually palTed, protefts from the penal- ties of the teft and corporation laws all fuch perfons as have offended againft them. If it afford fuch proteftion, what inconvenience can arife from a repeal of the ftatutes them- felves ? Is not the conftant and invariable praftice of pafling fuch a bill annually, a tacit acknowledgment that the tell afts are improper or unneceffary ; that the penalties, if in- curred, ought not to be enforced ; and therefore no man could be blamed for reforting to an indemnity, held out as a proteftion againft puniftiments inflifted by laws which the le- giflature itfelf continually treated with a kind of difrefpeft, and which were already almoft repealed in praftice, though they were ftill preferved in the ftatute-book by a fpecics of fuperftitious regard ? The only juftification for evading a ftatute, that can be for a moment maintained, is, when that ftatute notorioufty ought not to remain in force ; and when to evade it, on account of its nature and tendency, is meri- torious. But it has been faid, that the Indemnity aft does not proteft the diftenters from the teft and corporation laws ; for its only efFeft is, that of allowing farther time to thofe trefpaffers on the law, againft whom final judgment has not been awarded. Should, for example, a profecution have been commenced, but not concluded, the Indemnity aft does not difcharge the proceedings ; it merely fufpends them for fix months ; fo that if the party accufed does not take the facrament before the fix months allowed by the Indem- nity aft (hall expire, the proceedings will go on, and, long before the next indemnity aft will come to his rehef, final judgment will be awarded againft him. Thus it appears, that the Indemnity aft gives no effe&ual proteftion to the diffenter, who accepts a civil office or military command ; Vol. XXXV. T K S for lie who cannot take the facr.iment at all, cannot take it within the time required by that aft. After all, indemnity fuppofes criminality, and an obnoxioufnefs to punilhmeiit : the office and penalty are created by thefe ftatutes : repeal tlie laws, and indemnity becomes necdlcfs. No man would wifli, if it were always prafticable, to fhelter himfelf under an aft of indemnity fiir omitting to do what, independently of thefe laws, he ought not to do ; or chufe to have it tliought that he is lefs fit and able to ferve his king and country than his neighbour, who does not feel the reftraint of his confcientious fcruples. In corporate towns and many p^jMic offices, the obhgation to qualify is confidered as a kind of dead letter, and an informer would be very generally tliought an odious charafter. As to the Corporation a6t, it is faid to have been forced from tlie legiilature as an aft of felf-defcnce ; and this is the pro- per defcription of an aft, which, after the lapfe of much more than a century, when the grounds and reafons for paffing it no longer cxifted, ought to be repealed. The queftion that forms the fubjeft of this article is, in our opinion, intimately connefted with the honour of the church and the profperity of the ftate, as well as with the general interefts of religion and liberty ; and with thefe views of its importance, wc refer the decifion of it to the impartial judgment of the reader. Test, or Tefe, in Geography, a river of England, v^'hicii riies in the north-weft part of Hampfliire, bordering on Wiltfhire, and runs into Southampton Water. Sir Henry Englefield fecms inclined to think the original name v?as jint. TESTA, in Antiquity, the fame with ojlracon. See Os- tracism. Testa, in Italian Singing. When a performer fings through the nofe, the throat, or the teeth, the voice i* called •voce da tejla, to diftinguifh it from iioee di pclto. Tofi fays : " let the mafter attend with great care to the voice of his fcholar, which, whether it be di petto, or di tejia, (hould always come forth neat and clear, without paffing through the nofe, or being choaked in tlie throat ; which are two of the moft horrible defefts in a finger, and paft all remedy if once grown into a habit." Galhard's Tranfl. of Tofi on florid Song. Testa, Pietro, in Biography, called II Lucchefino, from having been born at Lucca. His birth took place in 1611, and he was firft inilrufted in painting by Pietro Paolini ; afterwards he ftudiedat Rome, under Domenichino and Pietro da Cortona. The principal objcfts of his ftudy were an- tique marbles, and the remains of ancient architcfturc ; in which employment fuch was his affiduity, that few veftiges of antiquity were known which had efeaped his pencil. His extreme poverty made him morofe and melancholy ; and he made himfelf many enemies, by the freedom with which he- fpoke of the produftions of other painters. From this ftate of trouble he was relieved by Sandrart, who found him among the ruins, and compaffionating his diftrefs, took him to his houfe, where he clothed and entertained him, and in- troduced him to the prince .Tufliniani, who employed liim. After this he fucceeded ; and the great freedom and eafe of his pencil procured him many patrons. Several of the churches and palaces at Rome are adorned with his produftions : the bell are efteemed to be thofe of the Death of St. Angelo, in. the church of St. Martino a Monti, and of the Death of Iphigenia, in the Palazzo Spada. His works, however, are more frequently to be met with at Lucca. As a defigner, Pietro Tefta was unequal : he frequently tacked to antique torfos ignoble heads, and extremities copied from vulgar models. Of female beauty he appears to have been igno._ 3 D rant, T E S rant, though he adopted a charaftcr and form which are pe- vuhar to himfclf. Of his compolhions, generally perplexed and crowded, the beft known and moll correct is that of Achilles dragging Heftor from the walls of Troy to the Grecian fleet. He delighted in allegoric fubjeas, and pro- duced many of piclurefquc effeft and attitudes : but, in their meaning, as obfcure as the occalions to which they allude. Of cxpreflion, he only knew the extremes, grimace, or loath- lome nefs and horror. As a colourill, he was frequently rich and effeftive, harmonious and warm : and his execution bears the llamp of incredible freedom : while his chiaro-fcuro is ma- naged with great breadth and depth. His juft charafter is that of a powerful machinift. He was drowned in the Tyber, in 1650, endeavouring to recover his hat, which the wind had blown into the water ; though fome fufpeft tliat he threw himfelf in, in a fit of defpondency, to which he was prone. He was an eminent engraver as well as a painter, and the number of his works in both arts atteft his induilry and inge- nuity, confidering the (liort period of his life. Testa, in Bolany and Vegdalk Phyfwlogy, is the fl^in of a feed or kernel, which enfolds the embryo, cotyledons, and, if prefent, the albumen, giving them their due fhape ; for this integument is perfedily formed, before they have at- tained any folidity or diftinft organization. The fliin is ge- neraliy double, as may be feen in the peach, apricot, and walnut, that glutinous coat of the latter, which ftains our lingers in peehng the kernel, being lined with a much finer, white and fmooth membrane, technically called membrana by Gxrtner. In true pulpy feeds, like thofe of Jafminum, a quantity of pulp is lodged between the membrana and the outer fliin. Both thefe integuments burft irregularly, merely from the fwelling of their contents in germination. Testa rtV Mora, in Geography, a Imall ifland near the E. coaft of Sardinia. N. lat. 40° 45'. E. long. 9° 53'. Testa di Saori, a town of the ifland of Corfica ; 7 miles N. of Baflia. Testa Ncvilli, or Tejla de Nevil, an ancient record kept by the king's remembrancer in the exchequer, containing the king's fees throughout the greateft part of England, with inquifitions of land efcheated, and fergeanties. It was denominated from its compiler Johan. de Nevil, one of the itinerant juftices under king Henry III. Testa Sep'iic. See Cuttle-/7/& Bone. TESTACEOLOGY, the fcience of teftaceous vermes, or, in other words, of thofe foft and fimple worms, which have a Ihelly or teftaceous covering; whether, as in fome kinds, it be fufficient to envelope and conceal the whole body, or only to cover a portion of it, as in others. The term is derived from teJla, a (hell ; or we (hould rather wifh, in order to fupport our definition, from Tejlacea, the name t)f the order of thofe vermes which have a Ihelly covering, and which, in the Gmclinian fyftem, are thus defined : TeStacea. Animalia Mollufca fimpUcia, domo fsepius cal- carea propria, obtefta. Under this idea of its derivation, the word teftaceology mull be confidered preferable to that of conchology, in dcfignating the fcience of thofe bodies which have a Ihelly covering ; becaufe it may imply, or be underllood to imply, not only the fcience of the {hells which form the covering or habitation, but tlie animal alio by which it is inhabited, while that of conchology might be confined to the Ihells alone. It muft however be confeffed, that, ftridly fpeak- ing, the terms teftaceology and conchology are fyno- nimous, and that their application in the manner we propofe, muft rather be determined by the tafte of the future natu- ralift than any pofitive rule we might lay down. The T E S fcience itfelf is but a branch of vermeology; and either the term conchology or teftaceology may be applied with much propriety, at the difci'etion of the writer. The term teftaceology is certainly of late invention, and may in fome degree be regarded rather as an innovation than amendment; for even with the definition we might be in- clined to adign it, in order that it may be retained, there is itill no aftual difference in its meaning from the term con- chology, a term which, to ufe the words of a writer of the lall century, " comprehends the ftudy of all animals that are teftaceous, or have fhelly coverings ; not only thofe of the lea, but alfo thofe of the rivers and land ;" and it has more- over an evident claim to priority, having been in ufe for at leafl the lad forty years among the beft Englilh authors. Da Cofta, a writer of no ordinary information, indeed ap- pears to have affumed to himfelf the eftablifhment, if not the attual invention of the term ; for in his " Elements of Con- chology," publilhed in 1776, he exprefsly obferves, " this pecuhar branch of the hiftory of nature, I fliall call con- chology." Many authors call it conchyliology ; and this we find to be true in compliance both with the French and the Latin, the " Conchyhologie" of D' Argenville, and " Hiftoria Conchyliocum" of Lifter, two works of great celebrity, that had appeared fome time before his " Elements" were pub- hfhed. We have thus endeavoured to prove that the terms teftaceology and conchology are purely fynonimous ; and if any doubt remained, we might finally quote one further paffage from the Elements before alluded to, in which we are diltinttly told, that " the term of Conchology, applied to this branch of natural hiftory by all authors, is quite appli- cable to its arrangement by the (hells, and not by the fifli." As we have already endeavoured to exemplify the rife, pro- grefs, and prefent ttate of the fcience of teftaceous bodies in a very ample manner under the article Conchology, and may be allowed to prefume, with fome little confidence, that we have therein concentrated much ufeful information upon this truly pleafing and very favourite fcience, it might be efteemed a wafte of words to enter into any very confiderable digreffion upon the fame fubjetl; again ; we (hall therefore merely recommend a careful perufal of that article to the at- tention of the reader, and trull the refult will be confidered fatisfaftory. It was indeed our wilh, and we had made fome general promife to that effeift, that under the prefent article we would refume this fubjett, and fubmit the outlines of what we were induced to think an improvement upon the prefent prevailing arrangement ; and upon this point it is now in- cumbent to offer a few remarks. The moft ardent admirer of the great Linnaeus will readily concede to us, that the fcience of conchology was not one of thofe within tlie province of his deep refearch, or the decided contemplation of his aftive mind. Its introduc- tion as a fcience, was neceffary to complete the feries of the vaft chain of animated nature, the clafTification of which he had undertaken in his " Syltema Naturx," and it was therefore one he could not omit. But for this, it is believed, and with tolerable certainty, th.it he would have willingly avoided the fubjefl altogether in the latter editions of that work, as it was in the early ones. We have already (hewn, under our article Conchology, the affual ftate in which Linnxus found the fcience, as handed down to him by his predeceffors ; and the var-ious purpofes to which he applied their labours and afliftance. From a general view of the v;hole, there can no doubt remain that there is yet much to amend in the claffification of (hells, and that the fubdivifion of many of the genera already eftabKfhed into natural genera, appears defirable. It was under this perfuafien that we had T E S T E S had iiitenJi'd, when writinjr the article Testaceology, to luive fuhmittcd our ideas as to a new and more comprehen- live claffification of the genera ; to have pointed out the very eflential dillintlions tliat exift in (hells of the fame Linnsean genera ; and have thence endeavoured to deduce an arrangement congenial with the charafters of the refpetlive natural genera which his artificial genera prefent. This we believe would have been regarded as an improvement in the claiTical diftribution of the (hell-tribe, but fuch an illuftration does not appear, upon more mature refledlion, to be admilFible here. It mud be apparent that no words, unaccompanied by (igures, could polTibly convey to the reader any adequate conception of the minute, ambiguous, and intricate elfential charatlers, which many among the various tribes of (hells prefent ; and that fuch a feries of plates as it would demand to illuftrate a fubjeft fo very copious and diffufe, however defirable in the opinion of the naturahft, could not be ap- propriated, with any degree of propriety, in addition to the very coftly feries of plates already devoted by the Cyclo- pedia to this fcience in particular. The feries of plates which have already appeared, eluci- date the whole of the Linn^an genera, and under each of thofe genera, a number of the more ftriking natural genera which appertain to them refpeftively. Thefe plates are numerous, and the fubjetts for them have been feleCled with every poffible attention ; nor can we helitate to think upon the whole they will be confidcrcd, without any further addi- tion, as amply fufficient for every ufeful purpofe of general information. TESTACEOUS, in Natural Hiflory, an epithet given to thofe filh, which are covered with a Itrong, thick (hell ; as oyfters, pearl-fifh, &c. In ftriftnefs, however, teftaceous is only applied to fi(li whofe ftrong and thick fliells are entire ; thofe which are foft, thin, and confift of feveral pieces jointtd, as the lobiler, &c. being called crtijlaceous. In medicine, all preparations of (hells, and fubftances of the like kind, are called teftaceous Such are powders of crab's claws and eyes, pearl, &c. Dr. Quincy, and others, fuppofe the virtue of all tefta- ceous medicines to be alike ; that tJiey feldom or never enter tlie lafteals, but that the chief of their aftion is in the firft palTages ; in which however they are of great ufe in ab- lorbing acidities. Hence they become of ufe in fevers, and efpecially in reftifying the many diftempers in children, which generally owe their origin to fuch acidities. TESTAMENT, Testamentum, in Law, a folemn and authentic aft, by which a perfon declares his will, as to the difpofal ofhiseftate, effefts, burial, &c. Teftaments, according to Juftinian, and fir Edward Coke, are fo called, becauf' they are tcflalio mentis ; an etymon, fays judge Blackftone, which feems to favour too much of the conceit, it being plainly a fubftantive derived from the verb tejiart. The definition of the old Roman lawyers is much better than their etymology ; voluntatis nujlm jujla fententia de eo, quod quis pojl mortem fuam jieri 'velit ; i. e. the legal declaration of a man's intentions, which he wills to be performed after his death. It is called fententia, to denote the circumfpeftion and prudence with which it is fuppofed to be made ; it is -voluntatis nojlra- ftntentia, becauie its efficacy depends on its declaring the teitator's intention, whence in England it is emphatically ftyled his mill: it hjujla fentrntia, that is, drawn, attefted, and pubhfhed witli all due folemnities and forms of law : it is de eo, quod quis pojl mortem fuam fieri -velit, becaufe a teftament is of no force till afty the death of the teftator. Blackftone's Com, vol. ii. A teftament lias no effcft till after death, and is always revocable till then. As tellamcnts are afts, of all others, the moll fubjedl to deceits, furpri'/e, See. it was found necidary to ufe all kinds of precautions to prevent the wills of the deceafed from being eluded, and the weaknefs of dying perfons from being abufed. See Will. The moll ancient teliaments among the Romans were made -viva voce, the teftator declaring his will in the prefence of feven witnefles ; thefe they called nuncupative teliaments; but the danger of trufting the will of the dead to tlic memory of the living foon abolidied thefe : and all tefta- ments were ordered to be in writing. The Erencli legiflators thouglit holographic teftaments, i. e. teftaments written wholly with the teftator's h'and, an abundant fecurity ; but the Roman law, more fevere, did not admit of teftaments without farther folemnity. The ealiell, and moft favourable, is the twenty-firft law in tile code de tejlamentis, which permits fuch as are un- willing to truft the fecret of their teftaments to others, to write it with their own hand, and to clofe it in the pre- fence of feven witnedes, declaring to them, that it is their teftament ; after which it is to be figned by all the feven witneffes. Otherwife, to make a folemn teftament, it was required to be attefted by feven witneffes, and fealed with their feals. Yet the military teftament was not fubjeft to fo many for- malities : the foldier was fuppofed too much employed in defending the laws, to be fubjeft to tile trouble of knowing them. His tumultuary profelTion excufed him from obferv- ing all the rules. See Military. Teftaments, wherein fathers difpofed of their cftatos among their children, had particular privileges, and were difpenfed from moft of the ordinary formalities. Testament, Prolate of a. See Phor ate and Will. Testament, Old and New, in Sacred Hiflory. The moft common and general divifion of the canonical books of fcripture, is that of the Old and New Teftament. (See Canon.) The Hebrew word Berith, from which it is tranflated, properly fignifies " Covenant." Accordingly St. Paul {2 Cor. iii. 6 — 18.), when he is ftiewing the fuperior excellence of the gofpel covenant, or the difpenfatioii by Chrift above the legal covenant, or the difpenfation by Mofes, ufes the word teftament, not only for the covenamt itfelf, but likewife for the books in which it is contained. The Hebrew term JT"12' berith, invaj-iably rendered cove- nant by our tranftators in the Old Teftament, is uniformly tranflated AiaflnHti in the Septuagint ; and in the writings of the apoftles and evangelifts, the words r, xaim ^irtSux.u are almoll always rendered by our tranllators the New Teftament. It is obferved, that the Hebrew term cor- rcfponds much better to the Englifli word " Covenant," though not in every cafe perfeftly equivalent, than to " Teftainent ;" and yet the word iiJcStuo', in clalTical ufe, is more frequently rendered Tejlament. Our tranflators, ancient and modern, have probably been led to render it Teftament, by the manner in which the author of the epiftle to the Hebrews argues (ch. ix. 16, 17.), in allufion to the clalTical acceptation of the term. The term Neiv is added to diftinguilh the religious inftitution of Jefus Chrift from the Old Covenant, that is, the difpenfation of Mofes. Ac- cordingly the two covenants are always in fcripture the two difpenfations, or religious inllitutions ; that under Mofes is the Old, and that under the Meffiah is the Netu. Hence, from fignifying the two religious difpenfations, they came foon to denote the books in which what related to thefe difpenfations was contained ; the feveral writings of the 3 D 2 .lews TESTAMENT. Jews being called .; caXa.a o\«9«»r, and the writings fuper- ;idded bv the apolUosaiid evanfrclifts, n xa./n hxiw-. 'The New Teftamont confifted very ' anciently of two codes or coUcaions, called gofpels and epiftlcs. This was the cafe in the time of Ignatius, and alfo in the time oi Tcrtullian, who diftinguillies the gofpcls by the names of the writers, and calls them our " Digefta," or digcils, in allufion, as it fcems, to fome coUedion of the Roman law-s digcllcd into order. As to the order of the feveral gof- pels, it appears, that in Tcrtullian's time they were dif- pofed, at Icalt in the African churches, according to the quality of the writers ; thofe two occurring firft which were written by apoftles, and then the other two written by apollolical men. In fome of the moft ancient MSS. now extant, the order of the feveral evangelifts is thus; Matthew, John, Luke, Mark. The order of the four gofpels has been generally this: Matthew, Mark, Luke, John ; then follow^he Afts, St. Paul's epiftles, the Catholic epiftles, and the Revelation. It fufficiently appears, from a variety of confiderations fuggefted by the excellent Dr. Lardner, that the books of the New Teftament, confiftincf of a coUeftJon of facred writings, in two parts, one called Gofpel or Gofpels, or Evangelicon ; the other Epiftles, or Apoftle or Apoftles, or Apoftolicon, were only known, read, and made ufe of by Chriftians. (See Canon.) It has been a fubjcft of fome difpute, whether any facred books of the New Teftament have been loft ; but there are many coniidcrations, tending to fatisfy us, that no facred writings of the apoftles of Chrift are loft. The four gofpels, in our poftefTion, were written' for the benefit of thofe who would undoubtedly receive them with refpeft, keep them with care, and recommend them to others ; and if any other fuch authentic hiftories of Jefus Chrift had been written by apoftles, or apoftolical men, they would have been received, and preferved in like manner. The book of the Afts, which we ftill have, was the only authentic hiftory of the preaching of the apoftles after our Lord's afcenfion, which they had in their hands, or had heard of; confequently there was no other fuch hiftory to be loft. The epiftles of Paul, James, Peter, John, Jiide, were fent to churches, people, or particular perfons, who would fhew them great regard when received, would carefully pre- ferve them, and readily communicate them to others, that they might take copies of them, and ufe them for their eftabliftimunt in religion and ifirtue ; and if other fuch epiftles had been written, the cafe would have been much the fame, nor could any of them have been eafily loft. Bclides, the apoftles and evar.-gelifts, who drew up any writings for the inftruftion or confirmation of Chriftiau people, mull have been careful of them. Upon the whole, we have no fufficient reafons for believing, that any facred writings of the New Teftament have been loft. All the books of the New Teftament were written in Greek, except the gofpel of St. Matthew, who, according to St. Jerom, firft wrote in Judea in the Hebrew language. Tertullian, as well as many other ancient writers, afford us various teftimonies to the integrity and genuinenefs of the gofpels and other books of the New Teftament in his time, as well as to their divine infpiration. See Bible. Although the New Teftament was written in Greek, an acquaintance with the Greek claflics will not be found fo conducive to the interpretation of it, as an acquaintance with the ancient Hebrew fcriptures. The propriety of its being written in the Greek language will appear from the follow- ing hiftorical faft. After the Macedonian conquefts, and the divifion which the Grecian empire underwent among the commanders ou the death of their chief, Greei foon became the language of the people of rank through ail tfiir extenfive dominions which had been fubdued by Alexander- The perfecutions with which the Jews were haraffed under Antiochus Epiphanes, concurring with feveral other caufes, occafioned the difperfion of a great part of their nation throughout the provinces of Afia Minor, Alfyria, Phcenicia, Perfia, Arabia, Libya, and Egypt ; which difperfion was in procefs of time extended to Achaia, Macedonia, and Italy. The unavoidable confequence of this was in a few ages, to all thofe who fettled in d.ftant lands, the total lofs of that dialeft, which tlieir fathers had brought out of Babylon into Palcftine, excepting only amongft the learned. At length a complete verfion of the fcriptures of the Old Teftament was made into Greek ; a language which was then, and continued for many ages afterwards, in far more general ufe than any other. (See Septuagint.) The Jews, who inhabited Grecian cities, where the oriental tongue was unknown, would be naturally anxious to obtain copies of this tranflation. Wherever Greek was the mother- tongue, this verfion would be gradually adopted into ufe not only in private in Jewifti houfes, but alfo in public in their fchools and fynagogues, for the explanation of the weekly leffons from the law and the prophets. The ftyle of it would confequently foon become the ftandard of language to them with regard to religious fubjefts. Hence would arife a certain uniformity in phrafeology and idiom among the Grecian Jews, wherefoever difperfed, in refpeCt of their religion and facred rites, whatever might be the particular dialefts which prevailed in the places of their refidence, and were ufed by them in converfing on ordinary matters. From the conformity and peculiarity in language now noticed, fome critics, in order to diftinguifti the idioms of the LXX and New Teftament from that of common Greek, have termed it HeUeniJltc ; which fee. Under that article we have intimated, that the habit which the apoftles and evan- geliils had of reading the fcriptures, and heai-ing them read, whether in the original or in the ancient verfion ; would, by infefting their ftyle, co-operate with the tendency which, as natives of Paleftine, they would derive from converfation, to intermix Hebraifms and Chaldaifms in their writings. Some modern writers, whilft they have adverted to this cir- cumftance, have defended the diftion of the facred penmen of the New Teftament, and extolled it as altogether pure and elegant. Among thefe we may reckon Pfochenius and Blackwall, who, with this view, have made diligent refearches among the writings of the ancient Greeks, for the difcovery of words and phrafes, which might appeal- to refemblc \vhat has been accounted Hebraifm or Syriafm in the New Tefta- ment. Whereas the writings of the New Teftament carry, in the very expreffion and idiom, an intrinfic and irrefiftible evidence of their authenticity. They are fuch as, in refpeft of ftyle, could not but have been written by Jews, and hardly even by Jews fuperior in rank and education to thofe whofe names they bear; and yet, under this homely garb, we find the moft exalted fentiments, the clofeft reafoning, the purefl: morality, and the fublimeft doftrine. Abftrafting from that loweft kind of beauty in language, which refults from its foftnefs and harmony, confidered as an objett to the ear, every excellency of ftyle is relative, arifing folely from its fitnefs for producing, in the mind of the hearer, the end intended by the wTiter. Now in this view it is evident, that a ftyle and manner may, to readers of one denomination, convey the writer's fentiments with energy as well as perfpicuity, which, to thofe of a different denomination, would convey them feebly, darkly, and, when judged by their rules of propriety, improperly. This feems to have been aftually the cafe with the writers of the Njw T E S New Ttllamcnt. The language of Malllicw, Mark, Luke, and ,l()hn, is better adapted to the readere, for wliofc life the Gofpels and Afts were at firft compofed, tliaii the hu\- guage of Plato or Demofthcnes would have been. If we would enter tliorou£rhly into the idiom of the New Teilament, we muft familiarife ourfelves to that of the Scp- tuagint ; and if we would enter thoroughly into the idiom of the Septuagint, we muft accuilom ourfelves to the ftudy, not only of the original of the Old Tcftanicnt, but of the dialeft ipoken in Paleftine between the return of the Jews from the Babylonifti captivity, and the deflrutlion of Jcru- falem by the Romans ; for this laft, as well as the Hebrew, has affefted the language both of the old Greek Iranflatiou and of the New Teilament. Such is the origin and the charafter of the idiom, which prevails in the writings of the apoftles and evaiigelills, and the remarkable conformity of the new revdation we Lave by them, though written in a different language, to tlie idiom of the old. It has been diftinguilhed in the former by the name Helleniftic, not with critical accuracy, if regard be had to the derivation of the word, but with fufficient exaftnefs, if attention be given to the application which the Hebrews made of the term Hellenift, by which they diilinguifhed their Jewifli brethren, who lived in Grecian cities and ipoke Greek. It has been by fome of late, after father Simon of the Oratory, more properly termed the Greek of the fynagogue. It is, acknowledged, that it cannot ftridlly be denominated a feparate language, or even dialeft, when the term dialctl is conceived to imply pecu- liarities in declenfion and conjugation. But, with the greateft juftice, it is denominated a peculiar idiom, being DOt only Hebrew and Chaldaic phrafes put in Greek words, but even fmgle Greek words ufed in fenfes in which they never occur in the writings of profane authors, and which caa be learnt only from the extent of fignification given to fome Hebrew or Chaldaic word, correfponding to the Greek in its primitive and moll ordinary fenfe. This dif- ference in idiom conftitutes a difficulty of .another kind from that which is created by a diftcrence in dialeft ; a dif- ficulty much harder to be furmounted, as it does not afFe£l the form of the words, but the meanmg. It is pertinent, however, to obferve, that the above re- marks on the Greek of the New Teftament, do not imply that there was any thing which could be called idiomatical or vulgar in the language of our Lord himfelf, who taught always in his mother tongue. His apoftles and evangelifts, on the contrary, who wrote iu Greek, were, in writing, obliged to tranflate the inftruftions received from him into a foreign language of a very different ftrufture, and for the ufe of people accuflomed to a peculiar idiom. The ap- parently refpeftful manner io which our Saviour was accofted by all ranks of his countrymen, and in which they fpoke of his teaching, fhews that he was univerfally confidered as a perfon of eminent knowledge and abilities. It was the amazing fuccefs of his difcourfes to the people, in com- manding the attention and reverence of all who heard him, which firft awakened the jealoufy of the fcribes and pharifees. Although all the writers of the New Teftament wrote in the idiom of the fynagogue, we are not to conclude from lience, that there is no difcernible diverfity in their ftyles. As the fame language admits of a vai-iety of dialefts, and even of provincial and foreign idioms, fo the fame dialeft and the fame idiom are fufceptible of a variety of ftyles. The ftyle of Paul has iomething peculiar, by which, in our opinion, there would be no difficulty in diiiinguifiiing him from any other writer. A difcerning reader would not T E S readily confound the ftyle of Luke with th.it of cither of llie rvangclids who preceded him, Matthew or Mark ; and ftill lefs would he miftake the apoftle .lohn's didiion for that of any other penman of the New Teftament. The fame differences of ftyle will be difcovered by one who is but moderately converfant in Hebrew in the writers of the Old Teftament. In it we have ftill greater variety than in the New. Some of the books arc written in profe and fome in Terfe : and in each, the differences between one book and another are confiderable. In the book of Job, for inftance, the charafter of the ftyle is remarkably peculiar. What can be more diffunilar in this refpcft, though both are ex- cellent iu their kind, than the towering flights of the fub- hme Ifaiah, and the plaintive ftrains of the pathetic Jere- miah ? In tlie books of Scripture we can fpecify the con- cifc ftyle and the copious, the elevated and the fimple, the aphoriftic and the diffufc. How this diverfity of ftyle is reconcilcable with the idea of infpiration, we have attempted to fticw under the article Inspikatiox. See Campbell's Prelim. Difl'. For other particulars in conneftion with the fubjcft of this article, fee Bible and Canon. TESTAMENTARY Adoption. See Adoption. Tkstamentary Caufes, in Law, are thofe that relate to teftaments, which were originally cognizable in the king's courts of common law, -viz. the county-courts ; and after- wards transferred to the jurifdiftion of the cluirch, by the favour of the crown, as a natural confequence of granting to the bifliops the adminiftration of inteftates' effefts. This fpi- ritual jurifdiftion of teltamentary caufes is a peculiar confti- tution of this ifland ; for in almoft allather (even in popifti) countries, all matters teftamentary are of the jurifdiftion of the civil magiftrate. And that this privilege is enjoyed by the clergy in England not as a matter of ecclefiaftical right, but by the fpecial favour and indulgence of the municipal law, and as it ftiould feem by fome public .lA of the great council, is freely acknowledged by I^indewode, the ablell canonift of the fifteenth century ; and about a century be- fore, in a canon of archbidiop Stratford ; alfo by the confti- tutions of cardinal Othobon ; and likewife by archbifliop Pai-ker, iu the time of queen Elizabeth. At what period of time the ecclefiaftical jurifdiftion of teftaments and intef- tacics began iu England, is not afcertained by any ancient writer. It appears the foreign clergy were early ambitious of this power, though they jvere curbed by the edift of the emperor Juftin, which reftrained the infinuation or probate of teftaments (as formerly) to the office of the nwg'tfler ceiifus : but afterwards by the canon law it was allowed, that the bidiop might compel, by ecclefiaftical cenfures, the per- formance of a bequeft to pious ufes. And therefore it fell within the jurifdiftion of the fpiritual courts, by the exprefs words of the charter of king William I. wliich feparated thofe courts from the temporal. And afterwards, when king Henry I. by his coronation-charter, direfted that the goods of an inteftate (hould be divided for the good of his foul, this made all inteftacies immediately fpiritual caufes, as much as a legacy to pious ufes had been before. This therefore, fays judge Claekllone, we may poffibly conjefture, was the era referred to by Stratford and Othubon, when the king, by the advice of the prelates, and with the confent of his b.trons, inverted the church with this privilege. This jurifdiftion is principally exercifed with us in the confiftory courts of every diocefan billiop, or iu the pre- rogative court of the metropolitan originally ; and in the arches court, and courts of delegates by ajipeal. It is divifible into three branches ; the probate of wills, the grant- ing of adminiftrations, and the fuing for legacies. The two fonuer T E S fonner of which, when no oppofition is made, are granted merely f.v officio et ihbito jujlitia, and are then the objeft of what is called the voluntary, and not the contentious junfdic- tion. But when a caveat is entered againll proving the will or granting adminiftration, and a fuit thereupon follows, in order to determine either the validity of the teftaaoent, or who hath a right to the adminiftration, this claim and obftruc- tion are remedied by the fentence of the fpiritual court, either by eftablilhing the will, or granting the adminiftra- tion. Blackftone's Com. vol. ii. See SuBTRACxroN of Lfgacits. Testamentary Guardian, Succejfion, and Tutorage. See the fubftantives. TESTAMENTO Annexo, Admmijlration cum. If a teftator makes his will, without naming any executors, or if he names incapable perfons, or if the executors named refufe to aft ; in any of thefe cafes, the ordinary mull grant admi- niftration cum tejlamento annexo, to fome other perfon. TESTAMENTS oftheTwehe Patriarchs, mEcclefiaftical Hiftory, a kind of apocryphal orfuppofititious book, in vi'hich thofe patriarchs are introduced, fpeaking their laft dying words, containing prediftions of things future, and rules of rirtue and piety ; which they deliver to their fons as a choice treafure, to be carefully preferved, and to be delivered by them to their children. We have feveral editions of thefe in Latin ; they were firll pubUftied in Greek, by Grabe, and from his edition repubhftied by Fabricius ; and tranflated into Enghfh by Mr. Whifton. Cave places the anonymous author of this book in the year 192, or nearer the beginning of the fecond century. They arc cited by Origen, and, therefore, were probably written before his time. Grabe thinks they were written before the time of our Saviour, and afterwards interpolated by a Chriftian. But Mr. Whifton afterts, that they are really genuine, and one of the facred apocryphal, or concealed books of the Old Teftament. Cave fuppofcs that this book was written by a judaizing Chriftian ; Grabe apprehends that it was written in He- brew : Beaufobre is of opinion that it was forged at the end of the firft, or beginning of the fecond century, by fome Chriftian converted from Judaifm, and he fufpefts that the author was an Ebionite, and that he believed Jefus to be the fon of Jofeph and Mary. Dr. Lardner is pofitive that thefe teftaments are not the real laft words of the twelve patri- archs ; but the clear knowledge of Chriftian affairs and principles ftiews this book to have been written, or elfe very much interpolated, after the publication of the Chriftian religion. He fays, there is nothing in this work that might not have been written by a learned Jew of the fecond cen- tury or later, though he thinks that the author was a Chrif- tian, and well verfed in the Jewifh learning : and moreover he is of opinion, that he is placed early enough by Cave, at the year 192. Lardner's Works, vol. ii. TESTATOR, or Testatrix, the perfon who makes his or her will and teftament. M. Gillet (hews, that a perfon incapable of a legacy can- not demand any fum which the teftator in his teftament de- clares himfelf indebted to him in ; in regard fuch a declara- tion of debt is prefumed a fraud againft the intention of the law. TESTATUM, in Law, a writ in pcrfonal aftions ; where, if the defendant cannot be arrefted on a capias in the county where the aftion is laid, but is returned non ejl in- ventus by the (heriff, this writ ftiall be fent into any other county, where fuch perfon is thought to be, or to have wherewithal to fatisfy the demand. It is called tejlatum, becaufe the (heriff has before tefti- iied, tliat the defendant was not to be found in his bailiwick. T E S TESTE, a term commonly ufed in the clofe of a writ, where the date is contained, which begins with Tejle meipfo, if it be an original writ ; or, if judicial, Tejle, the lord chief jujlice, &c. according to the court whence it comes. In fome ancient formulas, we read Tejle cnjlode Angliic. There muft be at leaft fifteen days between the tefte and return of every procefs awarded from the king's bench into any foreign county. See Writ. TESTENICH, in Geography, a fmall illand in the gulf of Venice. N. lat. 44° 54'. E. long. 14'' 47'. TESTER. See Teston. TESTES, Testiculi, in j^no/awy ; quia virilitatem tef- tantur ; glandular bodies, peculiar to the male fex of animals, ferving the office of fecreting the fecundating fluid : hence their removal deprives an animal of the power of propagating its kind. See Generation, Male Organs of. . The teftes are wanting in moil of the fith kind. The fpinofe fifties in general have neither teftes nor paraftatas ; but all the cetaceous fifties have them, and not a few of the cartila- ginous kinds. Thofe fifti that have them, have always two, as in land-animals ; but they differ much in figure and fituation in the feveral kinds, particularly in the whale and flat-fifti. See Anatomv of Fish. Testes of the Brain, two fmall hemifperical eminences, fituated at the pofterior and inferior afpeft of the optic thalami, and now more generally known, together with two very fimilar Ones immediately above them, by the name of tubercula quadrigemina. See Brain. Testes Synodales. See Synodales. TESTI, FuLVio, Count,' in Biography, an Italian poet, was born in 1593, at Ferrara, and fetthng, when young, at Modena, he rofe to the higheft offices and honours of the ftate. Neverthelefs, alternate profperity and adverfity vifited him : inconftant and ambitious, he fell into difgrace with Francis I. who imprifoned him in the citadel of Modena, where he died in 1646. His poems are chiefly of the lyric clafs. The produtiions of his maturer judgment are dif- tinguiftied above thofe of his contemporaries for vigour and poetical fpirit ; and fome of them, with refpeft to elevation of fentiment and beauty of imagery, will bear comparifon with the productions of the bcft Italian poets. He alfo attempted tragedy in two compofitions, intitled " Arfinda," and " L'Ifola d'Alcina;" but their ftyle is lyric rather than dramatic compofition. Tirabofchi. Gen. Biog. TESTIBUS Hiis. See Hiis. TESTICLE, Testis, in Anatomy. See Generation. Testicle, Difeafed, in Surgery. See Sarcocele, Hy- drocele, Fungus of the Tejlicle, Fungus Httmatodes, Hernia Humoralis, &c. Testicle, Operation of removing. See Castration. TESTIGOS, Los, in Geography, a clufter of fmall iflands, about ten leagues from the continent of South Ame- rica, and the fame diftayce from the ifland of Grenada. N. lat. 11° 25'. W. long. 62'^ 5'. TESTIMON, a town of Pruffia, in the province of Ermeland ; 16 miles S.S.E. of Hilft)erg. TESTIMONIAL, a kind of certificite, figned either by the mailer and fellows of the college, where a perfon laft refided, or by three, at leaft, reverend divines, who knew him well for three years laft paft ; giving an account of the con- dutt and learning of the perfon. Such a teftimonial is always required before holy orders are conferred ; and the biftiop even ordinarily demands one of a prieft; before he admits him to a benefice. Testimonial is alfo a certificate under the hand of a juftice of peace, teftifying the time and place when and where I a loldicr T E S a foldier or mariner landed, and the place of his dwtlling, and whither he is to pafs. TESTIMONY. See Evidknce. Teftimony is a ferious intimation from another of any faft or obfervation, as being what he remembers to have fecn, lieai'd, or experienced. The evidence of ti.'ilimony is either oral or written. Some have unreafonably fuppofcd, that this kind of evidence is folely and originally derived from experience. With regard to this it may be obferved, that the evidence of teftimony is to be coniidered as ilriftly logi- cal, no farther than human veracity, in general, or the vera- city of witneffes of fuch a charafter, and in fuch circum- ftances in particular, is fupportcd, or hath not been refuted by experience. But that teftimony, antecedently to expe- rience, hath a natural influence on belief, is undeniable, in which refpeft it refembles memory. And in what regards fmgle fafts, it is a more adequate evidence than any conclu- iions from experience. When experience is applied to the dif- covery of the truth in a particular incident, the evidence is called prej'umptive ; whereas ample teftimony is accounted a pofitive proof of the faft. Teftimony is capable of giving us abfokite certainty even of the moil miraculous faft, or of what is contrary to imiform experience. To this, when we have no pofitive reafons of miftruft or doubt, we are, by an original principle of our nature (analogous to that which compels our faith in memory), led to give an unlimited aflent. As on memory alone is founded the merely perfonal expe- rience of the individual, fo on teftimony, in concurrence with memory, is founded the much more extenfive experience, which is not originally our own, but derived from others. See on this fubjeA Campbell's Philof. of Rhet. vol. i. book i. chap. 5. and Differtation on Miracles, part i. fedt. i. and i. See Faith. For the credibility of human teftimony, fee Certitude. TESTINA, in Ancient Geography, a town of Italy, be- longing to the Sabines, placed by D'Anville S.W. of Ami- ternum. TESTING, in Metallurgy, denotes the operation of re- fining large quantities of gold and iilver, by means of lead, in the veflel called a teJI. This operation is performed by the de- ftruftion, vitrification, and fcorification of all the extraneous and deftruftible metallic fubftances with which thofe noble metals are alloyed. It confifts in adding to the alloyed gold and filver, a certain quantity of lead, and in expofing after- wards this mafs to the attion of the fire. The lead, by increaf- ing the proportion of imperfeft metals, prevents them from bt'ing fo well covered and protefted by the perfeft metals ; bv uniting with thefe, it communicates to them a property it has of lofing very eafily a great part of its inflammable principle ; and laftly, by its vitrifying and fufing property, which it exercifes with all its force upon the calcined and naturally refractory parts of the other metals, it facilitates and accelerates the fufion, the fcorification, and feparation of thefe metals. The lead, which in this operation is puri- fied, and fcorifies along with it the impcrfeil metals, fepa- rates from the metallic mafs with which it is then incapable of remaining united : it floats upon the furface of the melted mafs; becaufe by lofing part of its phlogifton, (according to the former language of chemifts,) it lofes alfo part of its fpecific gravity, and laftly it vitrifies. The removal of the vitrified matter in the procefs is procured either by the na- ture of the veffel in which the melted matter is contained, and which, being porous, abforbs and imbibes the fcorified matter as faft as it is formed ; or by a channel cut in the edge of the veflel through which the matter flows out. The procefs of telling is generally performed in the fame man- B-=r as that of cupellation. See Assaying and Copellinc;. T E S But when groat quantities of bafe metal are to be worked off from a little gold, recourfe is had to a more expeditious method, tliat of telling before the bellows. An oval tcft is placed in a cavity, made in a hearth of a convenient height, and fome moiftened land or afties prefled round it to keep it Heady : the nofc of a bellows is dircftcd along its furface, in fiuh a niaiuiir, that if afties are fprinklcd in the cavity of the tell, the bellows may blow them completely out • lonie have an iron plate fixed before the bellows, to dii. 6t the blaft downwards. To keep the furface of the teft from being injured in putting in tiie metal, fome cloths or pieces of paper are interpofed. The fuel confifts of billets of barked oak, laid on the fides of the teft, with others laid crofs-wife on tiufe : the bellows impels the flame on the metal, clears the lurface of afhes or Iparks of coal, haftens the fcorification of the lead, and blows ofiF the fcoria, as faft as it is formed, to one end of the teft, where it runs out through a notch made for that purpofe. About two-thirds of the fcorified lead may be thus colkftcd ; the reft being partly abforbed by the teft, and partly diflif atcd by the aiilion of the bellows. Care muft be taken lot to urge the blaft too ftrongly, left fome portion of the gold (hould be carried away by tlie fumes impctuoufiy forced off from the lead, and fome minute particles of it entangled and blown off with the fcorire. Macquer's Chem. Didl. Art. Rejining. Lewis's Ph. Techn. p. 146. TESTO, Ital. literally lejl. In Mufic it imphes a fub- jedl, or words of a fong, or other vocal compofition, to which fome air, melody, or harmony, is to be compofed. It is a matter of great concern to underftand well how to appropriate or adapt the mufic to the words of a fong, to exprefs the fenfe, and make a juft application of the long and fhort fyllables to the notes and time with wltich they are to be connefted. But this branch of the fcience, which depends greatly on the knowledge of poetry, has lain a long time almoft unre- garded ; and even at prefent, very little care is taken in this point in the modern mufic, which is fomewhat wonderful, fince it was to this that the ancients attributed the extra- ordinary effefts of their mufic ; for by them this branch was moft accurately obferved, and by this they regulated and governed their meafures, fo that they might produce the defired eff^efts ; and fome philofophers fay, the human paffions and affeftions. Voffius dc Poem. Cantu, &c. TESTON, Tester, the name of a coin ftruck in France by Louis XII. in 1513, and in Scotland in the time of Francis II. and Mary queen of Scotland, fo called from the head of the king, {lijle or fete,) which was engraved upon it. The filver it contained was 1 1 deniers 18 grains ; its weight, 7 deniers 1 1 ' grains; and its value 10 fols. The coinage of it was prohibited by Henry HI. in 1575, when the value of it was augmented to 14 fols 6 deniers. Encycl. A remarkable Scottifli medal of this kind was that in- augurative of Francis II. of France with Mary of Scotland, though it is more properly indeed French, being, as it is thought, ftruck upon their coronation, as being a queen of that country. It prefents bufts of Francis and Mar)-, face to face, with three legends around them, the outermoft of which contains their titles, the middle one tliis fingular fen- tence, " Which wonders how the devil it got there :" HORA NONA DOMINUS IHS EXPIRAVIT HELLI CLAMANS, a moft ominous motto, one would imagine, to a fuperftitious ear. The innermoft legend is only the name of the city of Paris. There are fine French teftoons of Francis and Mary, likewife prefenting them face to face, with the arms of France T E S France and Scotland upon the roverfc, as is nlfo the cafe of the medal lull mentioned. Thefc pieces are fo line and rare, that Dr. Hunter gave ten guineas for the one m his cabinet, which contains as vaft and well-chofen a private colkaion, of all forts of coins and medals, as any in the world. Telloons, or fliiUings, were firft coined m Scotland about the vear 1553, and they bore tlie bull of the queen and the arms of France and Scotland on the reverfe : they were of the fame intrinfic value with thofe of England, and were worth four fliillings ; the half-teRoon two, Scottifh money. The (liver telloon of Mary, chiefly of 1553 or 1562, with her bull, arc rare, worth about 30J. ; half ftill more rare, valued at 3/. Pinkerton on Medals. The tefton, teftoon, or teller, among us, fucceeded the groat, which was introduced by Edward III. in 1354. It was alfo called (hilling, and fu-ll coined by Henry VII. in 1503 : and was rated at izd. in the reign of Henry VIII. and afterwards reduced to 6if. The teiloon of the firft year of Edward VI. is extremely rare. TESTOON, or Testoxe, a filver coin in Italy, and alfo in Portugal. At Florence, the teftoon, or teftone, as a money of account and a fiWer coin, is worth two lire, or three paoU. The teftoon is a money of account at Liftjon, and is valued at 100 rees. And of the gold coins ftruck fince 172Z, there are the Dezefeis teftoon of 1600 rees, and the Oito teftoon of 800 rees. The filver coins are teftoons of 100 and halves of 50 rees. At Rome the fcudo, as a money of account, is divided into 3^ teftoni ; and among the filver coins, the teftoni are valued at 3 paoli, the paoli being worth ^^J, fterlbg nearly. See Coin. TESTORE, Carlo Giovanni, in Biography, a violinift and mufic-mafter, refident at Verfeilles in 1770. In 1767 he pubUfhed a treatife on mufic, entitled, " Mufica ragio- nata," in 410. This author was perhaps the firft Italian who adopted Rameau's principles. He fimplified his rules, and made his treatife more intelligible to principianti: than Rameau himfelf, or his fcientific commentator d'Alembert. The full title of his book is " La Mufica ragionata efprefta familiarmente in dodeci Paffeggiate a Dialogo, ornati 140 effempi Muficali in rami." TESTOURE, in Geography, a town of Africa, in the country of Tunis, on the Mejerdah ; 40 miles S.W. of Tunis. TESTUDO, in Antiquity, was particularly ufed among the poets, &c. for the ancient lyre, or lyre of Amphion ; becaufe it was faid to have been originally made, by its in- ventor Mercury, of the back or hollow (hell of a teftudo aquatica, or fea-tortoife, which he accidentally fomid on the banks of the river Nile. Mr. Molyneux has an exprefs difcourfe, in the Philofo- phical Tranlaftions, to fhew that the tortoife-ftiell was the bafis of the ancient lyre, and that the whole inftrument had thence the denomination teftudo ; which account throws fome light on an obfcure paffage in Hotace, ode iii. lib. 4. mif- taken by all the commentators : " O, teftudinis aureae Dulcem qus ftrepitum. Fieri, temperas ! O mutis quoque pifcibus Donatura cygni, fi libeat, fonura !" TestudO, Tortoife, in the Military Art of the Ancients, was a kind of cover, or fcreen, which the foldiers, e. gr. a whole company, made themfelves of their targets, by hold- ing them up over their heads, and ftanding clofe to each other. Thus, if we fuppofe the firft rank to have ftood upright T E S on their feet, and the reft to have Hooped lower and lower by degrees, till the lall rank kneeled down on their knees, fo that every rank covering with their targets the heads of all in the rank before them, they rcprefented a tortoife-fttell, or a fort of Hoping roof. This expedient ferved to (helter them from darts, ftones, &c. thrown upon them, efpecially thofe thrown from above when they went to the aflault. It was alfo ufed in field- battles as well as in fieges. Testudo was alfo a kind of large defenfive engine, of an oval figure, compofed of boards, and wattled up at the fides with wicker, which moved on feveral wheels, ferving to (helter the foldiers when they approached the walls to mine them, or to batter them with rams. Testudo, in Medicine, denotes a foft broad tumour, or gathering of impure humours between the /IvuU and the Hcin, called alio talpa, as refembling the fubterraneous windings of the tortoife or mole. Testudo, Tortoife, in Zoology, a genus of animals of the clafs of Amphibia and order of Reptiles ; the generic charac- ters of which are, that the body is furuifhed with a tail, and defended by a bony or coriaceous integument above and be- low, or above by fcales ; and that the upper mandible of the mouth clofes over the lower ; without diftinft or proper teeth, the teeth, as they are called in the generality of tor- toifes, being no other than the ferratures of the mandibles. Gmelin enumerates thirty-three fpecies, which are diftri- buted into the three claffes of marine, Jlwuiatile, and land tortoifes. A. Marine Tortoifes, or Turtles •with pinniform Feet, the former being longer. The animals of this clafs are diftinguiflied from the land tortoifes by their very large and long fin-fhaped feet, in which are inclofed the bones of the toes, the firft and fecond on each foot being furnilhed with vifible or projetling claws, the others not appearing beyond the edge. The ITiield, as in the land tortoifes, confifts of a ftrong bony covering, in which are imbedded the ribs, and which is coated externally by hard horny plates, in one or two fpecies much thicker and ftronger than thofe of the land tortoifes. Mr. Schcepf, cited by Dr. Shaw, obferves, that the apparent number of claws or projefting extremities on the feet of the marine tor- toifes, appears to be no certain criterion of the fpecies ; but, on the contrary, is found to vary fo as to contradift the Lin- nxan fpecific charafters. Species. CoRiACEA ; Coriaceous Tortoife. Striated lengthwife ; or brown turtle, paler beneath, with coriaceous fhell, marked by five longitudinal tuberculated ribs. This is the largeft of the marine tortoifes, being found eight feet long, and one thoufand pounds in weight. It is larger than others of its tribe, and its external covering differs by not being horny, but refembhng ftrong leather, marked over the furface into Imall, obfcurely fubhexagonal and pentagonal divifions, with- out deftroying its general fmoothnefs. The longitudinal ribs or ridges are five ; and comprehending thofe that border the fides, the number is feven. It has no under or thoracic (hell ; the head is large, and the upper mandible notched at the tip, fo as to exhibit the appearance of two large teeth, be- tween which, when the mouth is clofed, is received the tip of the lower mandibles ; the fins are large and long, and covered with a tough leathery Ikin ; the tail is rather (liort and (harp-pointed. This fpecies is a native of the Mediter- ranean, and has occafionally been taken on the cr>afts both of France and England. It is alfo found, not onU in the Eu-, ropeaa TESTUDO. ropean feas, but in tliofe of Soutli America, and about UimL- of the African coalls. Tlie Greeks, according to Cc- p6de, were well acquainted with this fpecinien, and iifed it in the conftruftion of the lyre or liarp. (See Ti:sixi)0, in jlnliquUy.) Pennant fays, that this fpccies is extremely fat, but the flciTi coarfe and bad ; but the Carthufians will cat no otlier fpecies. The fmall fea tortoife defcribed by Pennant in the Phil. Tranf. for 1771, is faid to be the young of this animal. Graehn mentions this and another as varieties. Imbricata. The imbricated or vaiiegated turtle with thirteen imbricated fcales on the dilk ; thefe lap over each other at the extremities like tiles on the roof of a building. The head is fmaller than in other turtles ; tlie neck longer ; and the beak narrower, fharper, and more curved, fo as con- fiderably to refemble the bill of a hawk, and from tliis cir- cumftance the animal derives its popular name of the " liawklbill turtle." This turtle is a native of the Afiatic and American feas, and is fometimes found in the Mediterra- nean. It has been often known to meafnre five feet in length, and to weigh 500 or 600 pounds. In the Indian ocean it attains a prodigious fize. Its (hell was anciently ufed for a fiiield, and ftill ferves for that purpofe among barbarous nations. The flelh is not eflecmed as a food ; the lamella: or plates of the (hell, being much ftronger, thicker, and clearer than thofe of any other kind, conftitute its fole value. See ToRTOisE-Wif//. MvDAS. Brownifh turtle, with tliirteen fcales on the diflc ; the green turtle of fome writers, with two nails on the fcre-feet, and lingle ones on the hind-feet. This com- mon green turtle (efculent turtle), is fo named from the green tinge, derived from the vegetable fubftances on which it feeds, often exhibited by its fat, when the animal is in its higheil perfeftion. It is one of the largeft of this genus, often meafuring above five feet in length (fometimes more than fix), and weighing more than 500 or 600 pounds. Its colour is a dull pali.'h brown, variegated with deeper undu- lations, but not exhibiting the beautiful colours which dif- tinguilh the T. imbricata. Its fle(h, however, is in fucb eftimation, that the inhabitants of the Weft Indian iflands have long confidered it as one of the mod excellent articles of food, and have introduced a fimilai' talle into fome of the European nations. In our own country it is much efteemed, and confiderable quantities of it are imported to fupply the luxury of the metropolis. Its introduftion, however, cannot be traced farther than about 50 or 60 years backwai'd. Sir Hans Sloane informs us, in his Hiftory of Jamaica, that forty (loops were employed by the inhabitants of Port Royal, in Jamaica, for catching them, and that the markets there are fupplied with turtle as ours are with butcher's meat. The method of taking them at the Ba- hama iflands is by ftriking them with a fmall iron peg two inches long, put in a focket at the end of a llaff twelve feet long. Two men ufually fet out for this work in a little light boat or canoe, one to row and gently ftecr the boat, while the other ftands at the head of it with his ftriker. The turtle are fometimes difcovered by theu" fwim- ming with their head and back out of the water, but they are ofteneft difcovered lying at the bottom, a fathom or more deep. If a turtle pci-ceives he is difcovered, he ftai-ts up to make his efcape, the men in the boat purfuing him, endeavour to keep fight of him, wliich they often loie, and recoTer again by the turtle putting his nofe out of the water to breathe : thus they purfue him, one paddling or rowing, v/hile the other ftands ready with his ftriker. It is fome- times half an hour before he is tired ; then he finks at once to the bottom, which gives them an opportunity of ftriking him, which is by piercing him with an iron peg, which flips Vol, XXXV. out of the focket, but is fattened with a ftring to the pole. If he is fpent and tired by being long purfued, he tamely fubmits, when (truck, to be taken into the boat or hauled afliore. There are men who by diving will get on their backs, and by prefling down tlieir hind parts, and raifing the fore -part of them by force, bring them to the top of the water, while another flips a noofe about their necks. The fea tortoifes, or turtles, fays Catefby, never go on fliore but to lay their eggs, which they do in April : tlicy then crawl up from llie lea above the flowing of high water, and dig a hole above two feet deep in the land, into which they drop in one night above an lumdrcd eggs, at which time they are fo intent on Nature's work, that they regard none that approach them ; but will drop their eggs into a hat, if held under them ; but if they are difturbed before they begin to lay, they will forfake the place, and feck an- other. They lay their eggs at three, and fometimes at four different times ; there being fourteen days between every time ; fo that they hatch and creep from their holes into the fea at dilferent times alfo. When they have laid their com- plement of eggs, they fill the hole with fand, and leave them to be hatched by the heat of the fun, which is ufually performed in about three weeks. It may be proper to add, that the eggs are about the fize of tennis-balls, round, white, and covered with a fmooth parchment-like (kin. Gmclin mentions feveral varieties of this fpecies. Caretta. The variegated turtle, with fifteen dorfal fcales, thofe of the middle range gibbous towards their tips. This fpecies is larger than any yet difcovered, ex- cept perhaps the coriacea. It is called the " loggerhead turtle;" and though it refembles the laft fpecies, or green turtle, it is diftingui(hcd by the fupcrior fize of the head, the proportional breadth of the (hell, and by its deeper and more variegated colours : but the principal diftinftion con- fifts in the number of dorfal fegments or fcutella of the (hell, which amount conftanlly to fifteen. The fore -feet are very large and long ; the tiind-feet much fliorter, though broad. In a commercial view, this fpecies is of little im- portance ; its flcfh being rank and coarfe, and the laminie of the (hell too thin for general ufe. It is faid, however, to afford a good quantity of oil, which may be ufcd for lamps, &c. This turtle is very ftrong and fierce, and even dan- gerous. It is an inhabitant of the fame feas with the green turtle, but has been found in remote latitudes, even in thii Mediterranean, and particularly about the coafts of Italy and Sicily. Macropus. With an ovate, carinate, emarginatc fliield, and the feet very large and bifarioufly unguiculated. B. Fluviatlle, tuitb pahnated feet , JJiell joined ivith the Jler- niim by a membrane, andfupported in the middle on lolhjidct by two proceffes of the Jlernum. Orbicularis. The T. europea of Schneider, with oval, flatti(h, fmooth, dark brown (hell, marked with very numerous yellowifh fpecks and ftreaks. This fpecklcd tor- toife of the " Naturahft's Mifcellany," or T. meleagris, is of fmall fize, the fliell mcafuring about four or five inches in length, and its diflc compofcd of thirteen, and the margin of twenty-live pieces ; the under fliell whitifli-yellow, tinged towards the joints with brown ; the head ovate, fomcwhat convex above, and flattifli on each fide and beneath ; the flcin of the neck lax and wrinkly ; the legs fhort and fcaly, feet webbed, fore-feet having five toes and hinderonly four ; the claws on all the feet (harp-pointed, and crooked ; the tail nearly half as long as the body, thin, attenuated, eom- preffed and fcaly, and alfo fpotted like the body. This elegant fpecies is a native of many parts of Europe, 3 E bemg TESTUDO. being found in Italy. Sardinia, France, Hungary, Pruffia, convex, carinatcd and rough &c inhabiting lakes and muddy waters, a.id feeding on defcnbed as having palmated h-et and flattiOi (hell, with all The fcabra of Linnxus is &c. inhabiting lakes and muddy aquatic plants, infetls, fnails, and imall hfh . , ■ r • • c i u c u v r i, * » faid to be "ood as food, for which pnrpofeu is fold in the ot this fpecies js figured by Seba ; it meafures about two The flefh is the intermediate fcutella elevated on the back. The fliell markets, and occafionallv kept in ponds, and fed or fattened with lettuce-leaves, broad, &c. &c. It may be conveniently kept in a cellar and fed with oats, fcattered on the floor, which it Precdily eats when thev begin to germinate. inches and a half in length, and nearly two inches in breadth ; being of a cordatcd figure, or fomewhat pointed at the bottom. Its colour is light-reddifh, variegated on tlie head and (hell with white lines and fpots ; the feet marked witli depolitsits eggs m fandy and funny places in the beginning red fpecks, and having each five toes with (harp claws ; the of fprinir which are not hatched, as it is pretended, till head prominent, and eyes fmall. Shaw. . f ^' ,• r •^_ Squamv*ta ; Scaly Tortoife. With ovate body, fmooth beneath, but covered above, together with the neck, feet, and tail, with numerous fcales. According to Bontius, in his Hiftory of Java, this fingular fpecies is an inhabitant of the fucceeding fpring. ^fF,MBKA^■\CEA. With three claws on the feet, and (hell (Iriatcd on the back, membranaceous, ovate and grey. Found in the fea that wa(hcs Guiana. See T. Ferox. Tkiunguis. With three claws on the feet, the didc of the back rugofe and orbiculated, the lower border fmooth, and noftrils in a cylinder elevated above and projefting be- yond the head. Found rarely in the Nile, and fuppofed to be the fame with the former. Cartilaginea. Shell orbicular, membranaceous, ftn- ated on the back ; three claws on the feet, and nofe cylindric and prolongated. This is the T. Boddaerti and a rare fpe- cies. See the next article. Ferox ; Fierce Tortoife. With ovate, cartilaginous fliell ; three claws on the feet, and tubular, prominent nof- trils. Dr. Shaw queries whether the T. roftrata of Schoepf, the T. with palmated feet, &c. of Thunberg, the T. cartilaginea of Boddaert, the T. Boddaerti of Schneider, the T. triunguis of Forlkal, and the T. mem- branaceaof Blumenberg,. do not belong to this fpecies. This is a remarkable Ipecies, and diftinguilhed by the un- ufual nature of its fhield, w^hich is hard and offeous only in the middle part, while the edges gradually degenerate into a flexible coriaceous verge ; obfcuiely marked with five or fix traiifverfe bands, and granulated with fmall warts or promi- nences, gradually enlarging as they approach the flexible edge ; the head rather fmall, fomawhat trigonal, with the fnout much lengthened, and the upper part drawn out into a fub-cylindric form, terminated by the noftrils, and pro- jefting much beyond the lower mandible ; the neck, when retrained, thick, and furrounded with many folds of (kin, but when exferted, equal in length to that of the whole (hell ; the legs fliort, thick, and covered with a wreathed lliin ; fre(h waters, where it burrows under the banks, in order perhaps to depofit its eggs. The Javanefe call it faunah, or the digger, and the Chinefe lary, or the runner, a burlefque title given to it on account of its flow pace. Its fle(h is faid to be extremely dehcate ; and the Chinefe ufe the pul- verized fcales dilTolved in water, as a remedy in dyfenteric cafes and againft the colic. It is faid to prey on fmall fi(h. This fpecies feenis to conneft the lizard and tortoife tribes. Shaw. LtJTARlA ; Mud or Brown Tortoife. With fiattiili (liell, and tail half the length of the body ; carinated, fays Gmelin, behind with three fcutella. This fpecies is faid to be common in many parts of Europe, as well as Afia, being found in India, Japan, &c. According to Cepede, it is not more than feven or eight inches from the tip of the nofe to that of the tail, and about three or four inches in breadth ; the dilk confills of thirteen pieces, ftriated and flightly punftated in the centre, and along the middle range runs a longitudinal carina ; the margin confifts of twenty-three pieces, bordered with (light ftriae ; the colour of the (hell is blackifh and alfo of the (Ivin ; the feet are webbed, with five toes before, and four behind ; the exterior toe of each foot is unarmed ; the tail is ftretched out in walking, from which circumftance the anirtial has been called " Mus aqua- tilis." Like other tortoifes, it fometimes utters a kiiid of broken hifs. This animal is common in France, and parti- cularly in Languedoc and many parts of Provence ; and in a lake, fituated in the plain of Durance, fuch numbers were found as to fupply the neighbouring peafantry for more the feet furni(hed with ftrong and broad webs, connefting than three months. Although this fpecies be aquatic, it .1 .1 in. r 1 ,T _ .1 _. ^ !'__/! u r-_* r...- _i 1 ;*- — i — i j: — ; i.^it„,.. — i ; — the three laft toes of each ; the three firft on each foot fur nilhed with ftrong claws, and the remaining ones unarmed ; having, befides the proper toes, two fpurious ones on the hind and one on the fore feet, ftrengthening and expanding the web ; the tail fhort, pointed, and curving inwards ; the eyes very fmall and round ; the colour above deep brownilh- olive, and below white ; the (hell marked beneath in a very elegant manner, with ramifications of velTels. This fpecies is found in Pennfylvania, Carolina, &c. &c. ; and is pofTeffed, diflFerently from moft others of the tribe, of confiderable vigour and fwiftncfs of motion, fpringing to- wards its alTailant, when attacked, witl great alacrity and fiercenefs ; about a foot and half long, and fifteen inches broad. It was firft defcribed by Dr. Garden. Its fle(h is faid to be extremely delicate, being equal, if not fuperior, even to that of the green turtle. The great foft-billed turtle, defcribed by Mr. Bartram in his Travels, appears to be the fame with this. Found in all the rivers, lakes, and pools of Eaft Florida, weighing from 30 to 40 pounds. The T. roftrata of Thunberg feems to be the young of the fpecies above defcribed ; and the T. triunguis of Forflcall f<3 as to be perfectly fecure. The defence of this httle • is allied to the fame fpecies. Shaw. animal, which rarely exceeds four or five inches ii. length, ScABBA. With fmooth difcoloured head, and fliield oval, is fuch, that k is uninjured by a weight of 500 Or 6co pounds, ' and always lays its eggs on land, digging a hollow and covering them with mould. This animal is ufeful in a garden, which it frees from noxious animals, without doing any mifchief itfelf. It may be domefticated, and kept in a bafon or re- ceptacle of water, fo contrived on the edges as to give it a ready egrefs, when it wifhes to wander about for prey. In fi(h-ponds it is deftruftive. Shaw. Gmelin mentions two varieties, "viz. T. tabulata and T. campanulata. SCORPIOIDES. See T. FlMBRIATA. Hermanni. With four claws on the feet, and the tip of the tail unguiculated. See T. Tbicarinata. Gmelin mentions feveral varieties of this fpecies. Carolina. With digitated feet, gibbous fliell, and no tail. This is the T. claufa, or clo-fe tortoife, of Linnaeus and other writers, with blackifti (hell, irregularly fpotted with yeOow, with obtufe dorfal carina, and bivalve undcr-fhell completely clofing the upper, whence it obtains its name. The under part of the (hell is fo continued round the margin, that when the animal withdraws its head and legs, it is able accurately to clofe all parts of the (hell together. TESTUDO. and able to walk under tliis heavy load. It is a native of many parts of Nortli America, found chiefly in marfliy liluations, and occafionally in the driell and hotttil places. ]t is principally fought for on accoinil of its eggs, which are reckoned a delicacy. It feeds on fmall animals, as beetles, mice, and even ferpents, wliich it draws into its fliell, and cruflies to death ; and alfo on various vegetable fubllances. Palustris. With dcpreifed (hell, five claws on the fore- feet, and four on the hind -feet ; found in the llagnant waters of Jamaica, and feekiug food in the adjoining meadows. This is the T. terrapin of Schospf, and the T. conccntrica of other writers, with fub-depreffcJ, fub-carinated, oval yellow Ihell, with the fcutella marked by concentric brown zones. The fliell meafuros from four to fix inches, or more. It is a native of North America, and fold in the markets at Philadelphia, and elfewhere, under the name of " Terrapin," which name is indifcriminately applied in America to feveral other fpecies. It is common, as we have already faid, in Jamaica, and firil defcribed by Dr. Browne, in bis " Hiilory of Jamaica," who fays it is a wholefome and even delicate food. In the Leverian Mufeum there is a large and beautiful fpecimen of the fhell of this fpecies. Shaw. Caspica. With orbicular fliell, fcaly head, five claws on the fore-feet, four on the hind, and naked tail. Gmelin reprefents it as a native of Hircania, inhabiting frefli waters, aud fometimes growing to a vaft fize. The pieces com- pofing the din< are fub-quadrate ; thofe of the border parallelogrammic ; the colour variegated with black and green ; the lower fliell blackifli, (potted with white. Clausa. See T. Carolina, fupra. Pensylvanica. Tortoife, according to Schoepf, with fmooth, elliptic, brown fliell, with flattilh back, the middle range of fcutella fub-rhomboid and fub-imbricated, the firfl; fub-triangular ; and according to Gmelin, with five claws on the fore-feet and four on the liind, and the apex of the tail horny and acute. This is the fmall mud tortoife of Edwards ; the fliell meafuring three or four inches in length. The head on tlie parts furrounding the jaws and eyes is of a reddifli-yellow colour ; the upper part, as well as the neck, legs, and tail, dufliy ; feet webbed ; the tail fmall. It is a native of North America, and is found in Pennfylvania, &c. inhabiting muddy waters. When living, it is faid to exhale a ftrong mulky odour. Mr. Schcepf mentions a variety, and another occurs in the Leverian Mufeum Shaw. Serpentina. The fnake tortoife, charafterifed by Schoepf as having an ovate, depreffed, triply carinated, (harp-fcaled fliell, rounded and acutely ferrated at the poltc- rior margin ; and by Gmelin as having digitated feet, fub- carinated fliell, behind obtufe, and. acutely quindentated. This is the ferrated tortoife of Pennant. It is a native of North America, inhabiting fiagnant waters, growing to the weight of fifteen or twenty pounds, or more, preying on fifli, ducklings, &c. feizing its prey with gi-eat force, and at the fame time ftretching out its neck, and hifling at the fame time. The head is large, dep'-efled, triangular, and covered with a fcaly and warty flcin ; the orbits of the eyes are oblique ; the mouth wide ; the mandibles ftiarp ; the neck covered by fcaly warts ; the toes diftinft ; the tail ftraight, and about two-thirds the length oi the fliell ; and tlie tinder part of the body covered by a loofc, wrinkled (Icin, befet with Imallifli foft fcales and granules. This animal conceals itfelf in muddy water, leaving out only a part of its back, and thus appearing to be a ft^one or other inanimate objeft, more eafily obtains its prey. In New York it is known by the title of the "fnapping tortoife." SpEJiiGLERi. See T. Serrata, infra. FiMBRiATA. Tortoife, according to Bruguiere, with oval, fub-coiivcx, triply carin.ited fiiell, fub-digitatcd feet, cylindric (nout, and neck fimbriated on each fide. This b an animal of very fingular and difagreeable appearance. The fliell is about fifteen inches or more in K ngth, and its breadth eleven ; but the whole animal, from the nofe to the end of the tail, is two feet three inches. The head ii> large and flat, rounded in front, and edged on tile fides with warty and wrinkled membranaceous appendages, about five- inches wide, and covered behind by a ihree-lobed promi- nence ; the nofe refcmblcs a probofcis, cylindric, ten line* long, truncated, pierced by the iioftirils, M the tip, where they are feparated by a cartilaginous divifion ; the eyes arc round, fcated at the bafe of the probofcis, and ten lines diftant from each other ; the mandibles are equal in length, and entire ; the gape of the mouth is wide ; the neck fcven inches long, and four and a half broad ; above flat and warted, and furniflied on each fide with fix fimbriated membranaceous appendages difpofed lengtliwife, and alternately larger and fmallcr ; the under part of the neck is Ijefet with four fimi- lar appendages, placed oppofite to the two on the head, and increafed by two longitudinal wrinkles : the fore-feet are fcaly and warty, having five indiftinft toes, with as many longifli fliarp claws, convex above and flat beneath ; the hind- feet are alfo fcaly, with Icfs diftinft toes, having four claws, the fifth toe being unarmed, and very fliort : the tail is au inch long,bcntflightly,and covered with a granulated flcin ; all the thirteen femicircular pieces, of which the fliell confifts, arc wrinkled and irregularly notched at the hind part ; the twenty-five marginal pieces are almoft fquare, radiated on tlie furface with oWique wrinkles, and toothed in the interior edge. The colour of the whole is brown, fomewhat paler beneath. This animal is faid to be a native of Guiana, but is now rare in the rivers of Cayenne, as it has been plentifully taken by fifliermen, it being confidered as excellent food. It feeds on aquatic plants, and wanders by night to fome dillance in fearch of pailure. It has been fuggefted, but without certainty, that this is the T. fcorpioides of Linnseus. Shaw. PiCTA. Tortoife with plane fliell, marked on both fides with a double fpot of a black-blueifli colour ; fcutella fur- rounded with a yellow margin, and neck ftj-iated longi- tudinally with yellow and black ; or tortoife with oblong, flightly convex, fmooth, brown fliell, with the fcutella bor- dered with yellow. This is the cinereous tortoife of Brown's Zoology, and fufficiently diftinguiflied from all others by the remarkable colours of the fhield. This is a frefli-water fpecies, and inhabits flow and deep rivers in North America, and ftiould have been referred by Gmelin to his fecond clafs. In clear funny weather thefe animals are faid to atfemble in multitudes, fitting on the fallen trunks of trees, ftones, &c. and immediately plunging into the water on the leaft: difl.urbance. They are faid to fwim very fwiftly, but to walk flowly ; to be able to continue many hours entirely beneath the watfr, but not to furvive many days if kept out of their favourite element. They are very voracious, deftroying duckhngs, &c. which they feize by the feet, and drag under water. They are fome- times uled as a food. The colour, as has been above ob- ferved, varies ; being fometimes of a blackifli-browu, at other times of a reddifli-chefnut : the yellow markings arc alfo either pale or deep in different individuals, and fometimes whitifli ; the inferior, or under edges of the upper fliell, as well as the upper edges, or comniiflures of the lower, are elegantly flreaked vidth black, as if artificially painted, and this variegation is continued over the /kin of the fides of the body. Shaw. GyrxAXA. Tortoife ("potted, with oblong, moderately 3 E 2 convex, TESTUDO. cOBvex. fmootli, brown (hc-U, wi* fcattcred yellow fpots. This is T. pundala of Schtcpf. It is a rather imall fpecies, and a native of North America, inhabiting rivers and lakes. Tlie young arc fcareely larger than pigeon s eggs, and arc very black, beautifuHy fpotted with gold colour. ■ . r r. l_ LoN'GlCOLLls ; Long-necked Tortoife. Smooth, ovate, with extremely long neck. This fpecies is a native of New Holland, and is of the river or frefii-water kind. The colour of the whole animal above is deep olive-brown ; beneath paler, and inchning to whitirti. Shaw. C. Land tortoiffs, nvith clavated unguicttJaled feet, convex Jhdl, and bony commijfuris joined with the Jlernum. DENTlcur.ATA. Tortoife with fub-digitated feet, and or- bicularly-cordated (liell, with denticulated marginal feg- ments. ' The (hell is of a pale yellowifh-brown colour, about four inches long and three broad, covered on the difk by broad hexagonal' and pentagonal fcutella, of a flattened form, with a large dillinft middle fpace, granulated by fmall tu- bercles, and the remainder marked by five lines or furrows. The edge of the (hell confifts of twenty-three pieces, projetl- ip.g in a'ferrated manner round the outline. It is fuppofed to be a native of North America. The feet, in Gmelin's edi- tion of the Syftema Natura:, are faid to be without dillinft toes ; and the tail (liort. Gr-^ta. The common land tortoife, with fub-digitated feet, hinder pait of the (hell gibbous, lateral margin very obtiife, and fcutella flattilh. Gmelin. It is defcribed by others as the tortoife with hemifpheric black and yellow (hell, gibbous behind ; the pieces com- pofing the diflv convex, and the fides obtufe. This tortoife is fuppofed to be a native of almoft all the countries bor- dering on the Mediterranean fea, and to be more frequent in Greece than in other regions. It is found in the Euro- pean Archipelago iflands, and in Corfica and Sardinia, and alfo in many parts of Africa. In Greece it is an aiticle of food ; the eggs are eaten boiled, and the blood is often fwallowed recent. In September the animal hides itfelf under ground, and emerges in February : it lays its eggs in .Tune, in a fmall hole on a funny fpot, out of which, after the tirft rains of September, the young are hatched. In Eng- land it retires about the end of Oftobcr, and re-appears about the middle of April ; but thefe feafons vary with the climate and weather, &c. The males often fight, butting at each other with a noife that may be heard at a con- fiderable diftance. This animal lives to a moft extraordinary age, exceeding the period of even a century. One of the moft remarkable inftances is that of a tortoife introduced into the archiepifcopal garden at Lambeth, in the time of archbidiop Laud, and as near as can be col- lefted from its hii^ory, about the year 1633, which con- tinued to liv? there till the year 1753, when it was fuppofed to have peri(hed rather from accidental negleft on the part of the gardener, than from the mere effcfl of age. This tortoife has had the honour of being commemorated by Derham, and many other writers, and its (hell is preferved in the library of the palace at Lambeth. The general manners of the tortoife, in a ftate of domefti- cation in this country, are very agreeably detailed by Mr. White, in his Hiftory of Selbourn. "Aland tortoife," fays Mr. White, " which has been kept thirty years in a little walled court, retires under ground about the middle of November, and comes forth again about the middle of April. When it flr(t appears in the fpring, it difcovers very little inclination for food, but in the lieight of fummer grows vo- racious ; and then, as the fummer declines, its appetite alfo de- clines ; fo that for the lail weeks in autumn it hardly eats at all. Milky plants, fuch a.s lettuces, dandelions, fovr» thirties, &c. are its principal food, " Tlie tortoife is totally a diurnal animal, and never ftirs after it becomes dark. The tortoife," adds Mr. White, " like other reptiles, has an arbitrary ftomach, as well as lungs, and can refrain from eating, as well as breathing, for a great p;urt of the year. I was much taken with its faga- city, in difcerning thofe that do it kind offices ; for as foon as the good old lady comes in fight who lias waited on it for more than thirty years, it hobbles towards its bcnefaftrefs with awkward alacrity ; but remains inattentive to llrangers. Thus, not only ' the ox knoweth his owner, and the als his matter's crib,' but the moft abjeft and torpid of beings dif- tinguifhes the hand that feeds it, and is touched with the feel- ings of gratitude. This creature not only goes under the earth from the middle of November to the middle of April, but (leeps great part of the fummer ; for it goes to bed in the longoft days at four in the afternoon, and often does not ftir in tlie morning till late. Befides, it retires to reft for every fhower, and does not move at all in wet days. When one reflects on the Hate of this ftrange being, it is a matter of wonder that Providence fhould beftow fuch a feeming wafte of longevity on a reptile that appears to relifli it fo little as to fquander away more than two-thirds of its exift- ence in a joylefs ftupor, and be loft to all fenfation for months together in the profoundeft of all (lumbers ! Though he loves warm weather, he avoids the hot fun ; becaufe his thick fhell, when once heated, would, as the poet fays of folid ai-mour, ' fcald with fafety.' He therefore fpends the more fultry hours under the umbrella of a large cabbage leaf, or amid the waving forefts of an afparagus bed. But as he avoids heat in the fummer, fo in the decline of the year he improves the faint autumnal beams, by getting within the refleftion of a fruit-tree wall ; and though he has never read that planes inclining to the horizon receive a greater (liare of warmth, he inclines his ftiell by tilting it againft the wall, to colleft and admit every feeble ray." The tortoife is faid to be more tenacious of life than any- other of the ampliibia ; many experiments performed upon them by Redi, of a cruel nature, fuch as opening their (liells, taking out the brain, cutting o(F the head, evince their tenacioufnels of life, and that the vital principle is very- (lowly difcharged from thefe animals. Shaw. Carinata. Tortoife with digitated feet, and gibbous fliell, with the four firft dorfal fcutella carinated, and entire fternum : found in warm regions, but very little known, Geometrica. Shell ovated, with all the elevated fcu- tella above plane, marked with yellow ftrix ilTuing from the centre in 'form of a ftar : or, according to others, this is the tortoife with ovate black fhell, and elevated fcutella radiated with yellow ; the T. teflelata minor of Ray. The pieces of which the dific of the (hell confifts are very prominent, ftriated, or furrowed pretty diftintlly with numerous lines on their fides,, and terminated above by a yellowi(h, flat, fquare, or rather hexagonal roughened fpace or centre, from which proceed, in a radiated direftion, feveral well-defined yellow ftr^aks towards the edge; thus conftituting a beautiful kind of geo- metrical appe^ance on the black ground colour on which they are difpofed : the marginal pieces, which are com- monly twenty-four, fometimes twenty-fix, in number, are alfo ftreaked with yellow, but in a fomewhat dilFercnt ftyle. The native country of this beautiful tortoife is perhaps not truly afcertained ; though the (hell is more frequently feen in Europe than that of almoft any other kind. It is faid, however, to inhabit Afia and Africa, and even to be found in America. According to Mr. Thunberg it is par- ticularly common in ihrubby places about the Cape of Good Hope. It is faid to lay about twelve or fifteen eggs at a time. TESTUDO. *.me. The count de Cepcde fuppofes this fpecies to be the Terrapin of Dampicr, which that navigator rcprcfcnts as very beautifully variegated, and as delighting in moid and marfliy places ; adding, that its flcfh is efteemed as a food, and that it is foinid in plenty on the coalls of the Pine iflands, between the continent of America and Cuba : they are found in the forefts, where they areeafdy taken : tlie hunters mark them on the fhield, and let them wander about the woods ; being fwre to find them again at no great diftancc, every one cafily recognizing his own property, and afterwards can-y- ing them to Cuba. Shaw. PusiLLA ; Little Tortoife. With fub-digitated feet, and hemifpheric fliell, with convex, trapezial Icutella, ftriatcd on the margin, and punftated on the difl<. This is the African land tortoife of Edwards, and thus defcribed by him from a fpecimen obtained from WeR Barbary. " The iris of the eye is of a reddifli hazel colour ; the lips hard, like the bill of a bird ; the head covered with fcales of a )-ellowini colour ; the neck, hind legs, and tail, covered with a flexible (Icin of a dirty flefh-colour ; the fore-legs covered with yellow fcales on their outfides, which are partly ex- pofed when the legs ai"e drawn in ; the (licll round, and pretty much rifing on its upper fide, and flat beneath ; the pieces or compartments are of a yellowifh colour, clouded and fpotted with large and fmall irregular diiflcy or blackifli fpots, and are alio furrowed or creafed, the creafes leflcning, one within the other, till they reach the top or middle part of each : the tail is thick, fcaly, and about an inch in length ; and the vent is fituated within the tail itfelf near the bafe : tliere are five claws on the fore-feet, and four on the hind, all ftrong, black, rather bowed, and fliarp-pointed." This fpecies is found at the Cape of Good Hope, and mucli re- fembles the T. gneea. IxDICA. Tortoife with brov\m flicll, refleifled above the neck, and marked with a tubercle on the three upper fcutella. This is the great Indian tortoife, iirft defcribed by Perrault in tlie " Hiftory of Animals," publiflied by the Royal Academy of France ; and confounded by M. Cepede with the T. grxca. It is found in India, on the coaft of Coromandel, &c. Of this there arc two varieties, one brought from the Cape of Good Hope, and another from the Southern iflands. Sulcata. Tortoife with a tail, digitated feet, gibbofe fhell, and fcutella lineated and circunifcribtd with a furrow ; or tortoife with brown ovate flicll, with furrowed fcutella yellow on each fide. This is one of the larger fpecies of land tortoife, being about a foot or mure in length from the nofe to the tip of the talL The fliell is very convex, and has the general habit of the graca and gcometr'tra as to fliape. This fpecies is faid to be a native of the Weft Indies, and perhaps may be the " Hicatee" of Brown, defcribed in his Hiftor)' of Jamaica. Dr. Shaw fuggefts that this fpecies may be the fame with T. tabulata. Planairia. Tortoife with digitated feet, and fliell oval, convex, and fmooth. Found at Surinam Americana Terrestri fliell ; fcutella yello\s' in the middle of the diflc ; the margin marked with fliining, black, furrowed, lateral polygons. This . is conjeftured by Gmelln to be the .Taboti of the Brafilians, and the cagado of the Portuguefe. Found in South America. Tabulata. Tortoife with oblong, gibbofe, brown /hell, with the fcutella of the diflv reftangular and fur- rowed ; with ycllowifli centres. This was firft defcribed and figured in Scba's " Thefaurus," and there faid to be a native of Brafil, though it is believed to be rather an African fpecies. The general length of the fliell is about 5 Tortoife with oval, gibbofe five or fix inches : fufpcctcd to be the fame fpccii'S with T. fiilcata, fupra. Sliaw. Maroinata. Tortoife with blackifli-brown, oblong, gibbofe fliell, variegated with yellow, widened and dc- prefled on the hind part. The true native country of tills Ipccies is not very diflinftly known. Mr. Scliccpf inclines to think that it is an American fpecies. Cepcde lias con- founded it with the T. grxca. Shaw. Radiata. Tortoife with ovate black fliell, and flattifh fcutella radiated with yellow. This is the great chetpiered tortoife-flull of Grcw's Muf. Reg. It has been concluded by ioine perfons, from a general rcfemblance in the pattern of the fliell, and a fimilarity in colours, that this is the fame fpecies with T. geometrica, or a variety of it. But Dr. Shaw has pointed out a variety of difl^eiences between them and fuch as warrant our ftpting that the two fliells arc per- fectly diftinft. Grew, who has defcribed this fpecies, fays that its native country is Mad.agafcar ; but Dr. Shaw iuggefls that it is alfo a native of .lamaica, and that in charadlers and fi/e it agrees with the " Hicatee" tortoile mentioned in Brown's Zoology. Shaw. RucosA. Tortoife wrinkled, with black wrinkled fliell, mottled and variegated with yellow ; with the middle dorfal pieces fubpanduriform or fiddle-fliaped. In the Leverian mufeum there is a variety, or perhaps a fexur.1 difference of ttiis fpecies. Elegan.s. Tortoife with orbicular, convex, yellow fliell, with tranfverfe, oval, brown fpots. Seba has defcribed it under the name of the T. terreflris Ceilonica elegans minor. Shaw. Areolata. Tortoife with moderately convex fliell, with fubquadrangular, elevated, deeply furrowed fcutella, and deprefled rough areolae. This is defcribed by Seba under the appellation of T. terreflris Brafilienfis. Serrata. Tortoife with depren"ed yellowifli fliell, mi- nutely freckled with duflty fpecks ; all the fcutella of the difli carinated, and the hinder margin of the fliell ferrated. This is fuppofijd by Dr. Shaw to be the T. fpengleri of Gmelin's Linnean Syftcm. Tricarinata. Tortoife with oval, flightly convex, fliell, with entire margin, and all the fcutella of the diflc carinated. This fpecies agrees, in fliape and other particulars, with LinuKus's defcriptlon of his T. orbicularis. Shaw. ScRlPTA. Tortoife with orbicular deprefled fliell, with all the fcutella marked by varioufly-formed charadlers, and the marginal pieces fpotted beneath. This is the T. fcabra of Thunberg. Its native place is not afcertained. Shaw. Galeata. Tortoife with deprefled oval fliell, with the three middle fcutella fliarply carinated, and twenty-four marginal pieces. The native place of this fpecies is not known ; but it was brought to Mr. Rctziua from India, and lived two years kept in frefli water : it fubfilled on bread, &c. and fometimes on flies. From the beginning of Oftober to the middle of May it remained without food, fcarcely elevating its head above the water. It delighted in funfliine, and endeavoured to climb up the fides of the veflel occafionally, in order to enjoy its influence. It is doubtful, whether this be the T. fcabra of Linnaeus. It is called galeata by Retzius, from the armed .or cataphraded covering of the head. Shaw. Granulata ; Chagrin Tortoife. With orbicular, flat- tifli, granulated flicll, with cartilaginous border. This fpecies fecnis to be alhed to the T. ferox, having the fliield furnlflied with a cartilaginous and flexible border. It is de- fcribed by M. Cepede, and was brought from India by M. Sonnerat. Shaw. Dr. Shaw, among the fea-tortoifes or turtles, has defcribed the T E T the turtle witli green variegated flicll. fo named by the count dc Cepede. Thefe turtles are laid to be fotuul ... "^ weighs 33 grains, and paffed for 5 drachms of iilver, 3^. 9^., now worth intrinfically ^s. TETAVI, in Geography, a town of the principality of Georgia, in the province of Caket. TETBURY, or Tedbiiry, anciently TV/c^otV, a large and refpedablc market-town in the hundred of Longtree, and county of Glouccfter, England, is fituated 20 miles S. by E. from Glouceiler, and 99 miles W. by N. from London. Its name evidently determines it to have been a military ftation. On the S.E. fide, within the memory of many living, were traces of a ftrong camp, now completely deilroyed, where arrows and javelin-heads have been found, with various EngHfh coins of high antiquity. Roman coins of the Lower Empire have likewife been met with in and near the town. Tetbury confilts principally of four ftreets, crofring in the centre, and contains many good ftone build- ings. The governing officer is a bailiff, wTio is annually chofen. The population sf the parifh, including four ham- lets, in the year 181 1, was 2533, the number of houfes 522. A weekly market is held on Wednefday, and four fairs an- nually. The wool-combing and wool-ftapling branches are carried on here, but to no great extent. The clothing ma- nufafture was formerly attempted, but the want of a con- tinual fupply of water prevented its being brought to per- fe&ion. Even for domeftic ufes, water has, till within a few years, been fcarce ; but in 1 749, a well was funk to the depth of 104 feet, fince which time other wells have been opened, and the inconvenience in a great degree removed. The pariih church confilts of an ancient tower, and a mo- dern body J the former is terminated by a fpire, the latter is built in imitation of the pointed ftyle, appearing exter- nally as a fingle nave with cloifters, but withinfide divided into aifles, by a very flight arcade and cluftered columns, on the principle on which the roof of the theatre at Oxford was conftrufted. The old church, which was built foon after the Conqueft, having become from length of time very ruinous, was taken down (excepting the tower and fpire), and rebuilt at the expence of 5000/. ; and opened for divine fervice in 1784. Two turnpike roads lead through the town in crofs direftions ; one to London and Bath, the other to Gloucefter and Southampton. A deep hollow, in the nature of a moat, at the weft end, made the entrance into the town inconvenient, till the commiffioners of the roads built a high bridge of four arches acrofs it in 1775. Rudge's Hiftory of Gloucefterfhire, vol. i. 1803. Beauties of England and Wales, vol. v. Gloucefterfhire ; by J. Brit- ton an-d E. W. Brayley, 1803. TETCHA, a fmall river of Ruflia, which runs into the Ifet, near Dolmatov, in the province of Ekaterinburg. TE-TCHUEN, a town of Corea ; 60 miles E.N.E. of Han-tcheou. TETE, a fort belonging to the Portuguefe, in the eoun- iry of Mocaranga, on the Zarabcfe. I T £ T Tete de Biich, La, a town of France, in the department of the Gironde, fituated on the S. fide of a large bay, called " The Harbour of Arcachon," the entrance of which is dangerous on account of the fand-banks ; 30 miles S.W. of Bourdeaux. TETEROA, a harbour on the W. coaft of the ifland of Ulietea. TETEROW, a town of the duchy of Mecklenburg; 18 miles S.W. of Guftro. TETERSKOI, a town of Riiffia, on the Podkamen- flvaia Tungufl^a. N. lat. 59'' 54'. E. long 101° 14'. TETHALASSOMENOS, a term ufed by the old me- dical writers, to exprefs wine mixed with fea-water. TETHER. See Tedder. TETHERING, the practice of confining animals to a certain range of feeding, by means of ropes, cliains, or other contrivances. TETHRONIUM, in ^Indent Geography, a town of Greece, in the Phocide ; being one of thofe which Hero- dotus refers to the vicinity of the river Cephifus. TETHUROA, in Geography, a fmall ifland in the South Pacific ocean, fubjeft to Otaheite, compofed of fix or feven low iflets near each other, not many feet above the level of the fea ; abounding in cocoa-nut trees, but not in bread- fruit, which the inhabitants are not allowed to cultivate. The inhabitants are about 3000, chiefly employed in catch- ing of fifh, which they bring to Otaheite, and exchange for bread-fruit ; 24 miles N.Wl of Point Venus. S. lat. 17° 4'. W. long. 149° 30'. TETHYS, in Mythology, the daughter of Coelum and Terra, and wife of Oceanus. Her chariot, which is repre- fented as gliding over the furface of the waters, was a fliell of an extraordinary figure, and whiter than ivory. Tethvs, in Zoology, a genus of the MoUufca order of Vermes, or worms ; the charafters of which are, that the body is free, fomewhat oblong, flolby, and having no peduncles j the mouth terminating in a cyliudric probofcis, under the' lip ; and two foramina on the left fide of the neck. It has two fpecies. Leporius. With a ciliated lip ; found in the Mediter- ranean fea. FiMBUiCA. With a crenulated lip ; found in the Adriatic fea. TETIMIXIRA, in Ichthyology, the name of an Ameri- can fifli, more ufually known by the name of the pudnino. TETIN, in Geography, a town of Bohemia, in the circle of Beraun ; 3 miles S. of Beraun. TETITLAN, a town of Mexico, in the province of Xahfco ; 18 miles S.E. of Compoftcllo. TETIUS, in Ancient Geography, a river of the ifle of Cyprus, which ran from the N.W. to the S.E. and dif- charged itfelf into the fea, near the promontory of Dades, after having watered Citium. TETIUSCHI, in Geography, a town of Ruflia, in the government of Kazan, on the Volga; 52 miles S. of Kazan. TETOBE, a town of the ftate of Georgia ; 5 miles W, of Tugeloo. TETRACERA, in Botany, received that name from Linnaeus, in allufion to the four horn-like points of the cap- fules of the original fpecies, the word being compounded of nr^x!, four-fold, and ns^a;;, a horn. The genus however has fubfequently received an acceflion of feverul fpecies with foli- tary capfules and ftyles, which invalidate the ftrift propriety of its name, and render its fituation in the artificial fyftem of Linnaeus ambiguous Linn. Gen. 275. Schreb. 369. Willd. Sp. PI. v. 2. 1240. Mart. Mill. Dift. v. 4. Juff. 339. Lamarck lUuttr. t. 485. Qsertn. t. 69. (Delima; Linn. Gen. TETRACERA. Gen. 271. Schreb. 359. .TiifT. 339. Lamarck Illuftr. 1.475. Gasrtii. t. 106. Rhinium ; Schreb. 701. Tigarea; Aubl. Guian. 917. .TiifT. 339. I^amarck Illuftr. t. 826. Euryandra ; Forft. Gen. t. 41. Sclireb. 367. .IiitT. 280. See EuRYANDK A. ) — Clafs and order, Polyandria Tetragynia, Linn. Willd. Rather Icnfandria Moiio^^yiiiti ; or Pent agynia, according to the principles hiid down in Sni. Introd. to Bot. ed. 3. 325. Nat. Ord. Senticofit, Linn. Rofaceic, JufT. Gen. Cli. Cal. Perianth inferior, of one leaf, in five or fix deep, rounded, unequal fegments, permanent. Cor. Petals from three to five, roundifh, concave, infcrted into the calyx, and longer than its fegments. Stam. Filaments numerous, inferted into the calyx, /liorter than the petals ; anthers of two round lobes. Pifl. Germcns fuperior, from one to three or four, ovate, quite diftinft ; Ityles vertical, awl-{haped ; ftigmas obtufe. Perk. Capfules from one to three or four, ovate, divaricated, each of one valve, burll- ing along the upper edge, of one cell. Seeds folitary, roundifh, attached to the bottom of the capfule, and clothed with a jagged tunic from the bafe. EiT. Ch. Calyx in five or fix deep unequal fegments. Petals four or five. Capfules burlHng at their upper edge. Seeds folitary, tunicated. Obf. The capfules refemble follicles, but the feed is at- tached to their bafe. Seftion I. Flowers ivhh a folitary germcn andjiyle. 1. T. Jarmenioja. Trailing Tetracera. " Vahl Symb. V. 3. 70." Willd. n. I. (Delima farmentofa ; I,inn. Sp. PL 736. Burm. Ind. 122. t. 37. f. I. Piripu ; Rhecde Hort. Malab. v. 7. loi. t. 54. Frutex indicus farmentofus, foliis hifpidis rigidis, &c. ; Burm. Zeyl. 161.) — Leaves el- liptic-oblong, ferrated, rough. Style folitary. Follicle ovate, polilhed, briftly. — Native of Ceylon. — The Jlem is flirubby, with trailing, round, leafy branches, rough with minute briftly hairs. Leaves alternate, ftalked, very rough on the upper fide with minute fcales, furnifhed with one rib, and many ftraight, parallel, tranfverfe, obhque veins, which latter are haii-y beneath. Panicles terminal, compound, many-flowered, hairy. Calyx of the fruit reflexed, reddifh, fringed. Follicle pointed, the fize of a fmall pea, brown, highly polilhed, clotlied with ereft brilUy liairs. Seed black, ftanding on a toothed cup-like tunic. 2.T. tometitofa. Downy Tetracera. Willd. n. 2. (Ti- garea dentata ; Aubl. Guian. 920. t. 351.) — Leaves ellip- tical, pointed, with tooth-like ferratures ; fniooth above ; downy beneath. Flowers dioecious. Style folitary. — Na- tive of woods in Cayenne, flowering in January, and ripen- ing its feed in March. The trailing (hrubby branched_y?«« climbs to the tops of the higheft trees, from whence its pen- dulous branches reacli almoft to the ground. The young (hoots are downy. Leaves alternate, ftalked, four or five inches long, and two or more in breadth ; their upper fur- face fmooth and green ; the under filky and hoary. The jlowers and fruit agree with the following. 3. T. afpera. Harfli Tetracera. Willd. n. 3. (Tigarea afpera ; Aubl. Guian. 918. t. 3J0.) — Leaves roundifli, fomcwhat undulated, rough. Flowers dioecious. Style fo- litary.— Frequent in the woods of Cayenne, bearing flowers and fruit in January. Aublet fays it is fometimes fo abundant as to render the forefts impaflable, from the en- tanglement of its fiems and branches, which climb to the tops of trees, and hang from thence to the ground. Their Toughnefs, like that of the leaves, renders them the more troviblefome and dangerous. The French call tliis Ihrub Liane rouge, or red climber, from the colour of its de- coftion, which the natives of the country confider as a lemedy for venereal diforders. The leaves are alternate, ftalked, of a broad elliptical, or roundifh, figure, obtufe, (lightly wavy at the margin, rough on both fides with rigid, crooked, hoary hairs. Their ribs and veins like thofc of the firft fpecies. The largeft leaves are three inches and a half long, and three broad. Floiucrs in axillary panicles, male on one plant, female on another. Calyx in four or five concave, pointed fegments. Petals four or five, white. Stamens numerous, fliort. jinthers yellow, their two lobes feparated by a furrow. Pijlil abortive in the male flowers, as the flatnens are without anthers in the female, whofe germen is roundifti, with imcjlyle, and a broad blunt flignta. Capfule folitary, rcddifti, rough to the touch, con- taining one leed. jiublet. 4. T. nitida. Poliftied Tetracera. " Vahl Symb. v. 3. 70." Willd. n. 8. — " Leaves lanceolate-oblong, rough, en- tire. Style folitary." — Suppefed to be a native of Trinidad, mild. Willdenow has four more fpecies in this feftion, of which his T. Doliocarpus, flritta, and Calinea, will be found under our article Dolkkarpus ; and his T. obovata is our Mappia. Seft. 2. Floiuers luith three or four germens andflyles. 5. T. Euryandra. New-Caledonian Tetracera. " Vahl Symb. V. 3. 71." Willd. n. 9. (Euryandra fcandens ; Forft. Prod. 41.) — Leaves oblong, obtufe, fmooth, entire. Styles' three. — Native of New Caledonia. Stem flirubby, climbing. Leaves ftalked, two inches or more in length ; paler beneath. 6. T. volubilis. Serrated Rough Tetracera. Linn. Sp. PI. 751. Hort. Clift'. 214. Willd. n. 10. (Arbor ame- ricana convolvulacea. Broad leaf, :'. e. platyphyllos barba- denfibus ditta, foliis ferratis ; Pluk. Phyt. t. 146. f. i.) — Ijeaves obovate-oblong, ferrated, very harlh. Styles four. Calyx filky within. — Native of the Weft Indies. The branches are round, with a rough, dotted, membranous, de- ciduous bark. Leaves alternate, ftalked, five or fix inches long, and two and a half or three wide, obtufe, very rough, like a file, with minute fcales, efpccially beneath ; each late- ral rib, at leaft in the upper half of the leaf, terminating in a ftiarp but (hallow ferrature. Panicles terminal, compound, rough with ftarry hairs. Calyx har(b and hoary externally ; briftly and filky within. Capfules unequal, ovate, tumid, beaked, brown, fmooth and highly poli(hed ; rounded, not deprefTed or keeled, at the fides. Seed fmall, black, in a pale, finely laciniated, tunic. 7. T. rotundifoUa. Round-leaved Tetracera. — Leaves ronndifh-elliptical, entire, very liarfh on both fides. Styles four. Calyx fmooth within. — Native of Guiana. We have received fpecimens of this new fpecies from Mr. Rudgc and Mr. Forfter, under the name of Tigarea afpera of Aublet, our Tetracera afpera, fee n. 3, which, unlefs that author has made feveral great miilakes, muft be a very different plant. The prefent has always three or four flylrs, and as many cap- fules ; and the leaves, though like Aublet's t. 350. in fhape, are quite entire, not undulated. They are harfli on both fides, hke a very fine file, as is the branch in a lefs degree. The panicles are terminal. The crt/y.v has a (hort, inverfely conical, tube, and is hoary externally, fmooth and naked within. The f/amens appear to be perfeft in the fame flower v.'ith the four pijlils. Capfules three or four, oval, brown, fmooth and (hining ; keeled and deprefted at the fides, lefs tumid than the foregoing. Seed entirely enveloped in its jagged tunic. 8. T. lievis. Smooth Tetracera. " Vahl Symb. v. 3. 71." Willd. n. II "Leaves oblong, fmooth, pointed, nearly entire. Flowers terminal. Capfules four." — Native of the Eaft Indies, Stem fhrubby. Leaves alternate, two or three inches T E T iuclics long, veiny, fmootli on both fides ; tapering at the bafe; ferrated with a few (light teeth towards the point. Footjlalh very (hort. Flo'wer-Jlalks fohtary or in pairs, ter- minal, an inch long. Fkrjuers fomewhat raccmoie, one or two on each partial ftalk. Calyx with (ix roundi(h feg- ments. Capfules four, as long as the finger-nail, roundiih, tumid, pointed, very finooth and polifhed. Seedim^A, black, polilhed, covered in its lower half with a whitifli tunic, whofe margin is tootiied. Fahl. 9. T. ainifolia. Alder-leaved Tetracera. Willd. n. 12. ;>ct:, a cafe, or cell, a name firft contrived by Dillenius, to exprefs the fquare form of the common calyx, and now retained by L'Heritit-r and Willdenow for the original and only remaining fpecies of the genus. See the others under Didelta, Polymnia, and Wedelia. —Dill. Ekh. 378. Linn. Gen. 438. L'Herit. Stirp. 177. Willd. Sp. PI. V. 3. 21 16. Ait. Hort. Kew. v. 5. 84. Purfti 563 Clafs and order, Syngenefia Polygaminfuperflua. Nat. Ord. Compoftic nppnfit folia, Linn. Corymhifrtt, Juif. Gen. Ch. Common Calyx fimple, large, of one leaf, in four deep, flat, fpreading, triangular-heartfhapcd fegments, permanent. Cor. compound, radiant. Florets of the diflc perfeft, numerous, funnel-fhapcd, five-cleft, rcflexed ; thofe of the radius ten or twelve, ligulate, dilated outwards, three-cleft, equal, bluntifh. Stam. in the florets of the diflc. Filaments five, capillary, very Ihort ; anthers united into a cylindrical tube. Fiji, in all the florets. Germcn roundifli ; ilyle thread-fhaped, the length of the ftamens ; ftigmas two, reflexed or revolute. Peric. none. Seeds foli- tary ; in the dillc roundifti ; in the radius fomewhat ovate. Down none. Recept. chaffy. Eff. Ch. Receptacle chaffy. Seed-down none. Calyx fiinple, of one leaf, quadrangular, in four deep fegments. Obf. The fynonym of Tetragonoihcca, Linn. Gen. 438, fliould be erafed from our article Poi.ymnia. I. T. helianthoides. Sun-flower Tetragonothcca. Linn. Sp. PL 1273. Willd. n. I. Ait. n. I. Purflin. I. (T. doronici maximi folio ; Dill. Elth. 378. t. 283. Polymnia tetragonotheca ; Linn. Syft. Veg. ed. 13. 658. Sm. Inf. of Georgia, v. 2. 137. t. 69.) — Native of North America, in a fertile foil, on the borders of woods, and along hedges, from Virginia to Florida, flowering from July to September. Purjli. The root is perennial, hardy in our gai'dens. Stem ereft, round, leafy, hairy, branched, from four to fix feet high. Leaves hairy, veiny, toothed or wavy ; the lowermoft ftalked, ovate ; upper feflile ; oppofite acute. Flowers from the forks and ends of the branches, ftalked, large, of a golden yellow, refembling a fun-flower. TETRAGONUS, in Jnatomy, a mufcle, called alfo quadrntus geutt. TET R A G R AMMATON, Tcrpa') fxjxjxxn-., a denomina- tion given by the Greeks to the Hebrew name of God, mn' Jehovah, becaufe in the Hebrew it confifts of four letters. See AdONAI. TETRAGYNIA, in Botany, from t(1^«, and yum, a female, the name of an order in feveral claffes of the Linnxan artificial fvftem, charadlerized, as the word itfelf imports, 3G by T E T by the flowers having four ftyles, or piftils. This order is better founded, and more invariable, in fome clafles than others. With the TetrandRIA, (fee that article,) it na- turally correfponds, and is well exemplified in the genera Polamogeton and RuMia. In Oclandna, though of rare oc- currence, it is no lets certain. In Icofandna and Polyandna it is very fallible, of which we have lately given examples. (Sec Tetracera and Tetkagosia ; alfo Polyandria.) The order Tetragynia in tlie clafTes Pnitandria and Dodc- candria is, however, fufficiently well-founded. In Decan- dria no example of it occurs, nor fcarcely in Hexandrla. TETRAHIT, an old name, fuppofcd to allude to the four-cornered item. See Galeopsis. TETRALOGIA,.in the Dramatic Poetry of the ytncients, denoted four dramatic pieces of the fame author, of which the three firil were tragedies, and the laft of the fatyric kind. Their defign was to celebrate a viftory in the hte- rary contells. jt!,fchylus and Euripides have written fome pieces of this kind. Encycl. TETRAMETER, in the ylnciait Poetry, an iambic verfe confilling of four feet. The word is formed from Tilfncyfour, and nsljov, meafurc ; q. d. four metres. — Wc meet with none of thefe but in the comic poets, as Terence, &c. TETRANDRIA, in Botany, the fourth clafs in the Linnasan artificial fyftem, is fo called from TSTf:^, and y.-/r,^, a man, becaufe it is characterized by having four flamens, in the fame flower with the piftil or piftils. Thefe are of equal length, the flower being regular, by which this clals is dillinguiflied from the 14th, whofe flowers are ringent, and two of their four ftamens, which ftand next each other, are longer than the reft:. See Didvnamia. The orders of this fourth clafs are three, diftinguifhed by the number of their piftils. I. Monogynia, a numerous and various order, comprifing the ample tribe of Proteacee ; and the intricate family of the Stellata, to which Galium and Rubia belong. The large genera of Scabtofa and Plantago likewife range under the Tetrandria Monogynia ; the former of which exhibits a curious example of aberration in number between the corolla and Jiamens. Some of its fpecies have a four-cleft corolla, aniw'ering in that refpedl to the Jiamens, whilft others have five fegments in the former, though the number of the latter remains invaria- bly but four. 2. Digynia is a fmall order, to which, amongft a few other genera, Linnxus has referred Cufcuta, but ft rather belongs to Pentandria Digynia, the greater number of the fpecies having five-cleft pentandrous flowers. This order will, however, receive a very curious acceffion in Tetrarrhesa. (See that article.) 3. Tetragynia contains Ilex, Potamogeton, and Ruppia, Britifli genera, all of which have four fefl51e ftigmas ; with feveral others, not naturally related, but for the moft part feparated, by the artificial character of number, from their alhes in other parts of the fyftem. That charadler however is fufficiently conftant in the prefent inftance. Tetrakdria is likewife the denomination of feveral orders in the Linnaian Syftem, as in Gynandria, if Stylidium (fee that article) be judged to have four ftamens ; and cer- tainly in Monoecia and Dioecia, where there are feveral really tetrandrous genera. . TETRANGURIA, a name ufed by fome authors for the citrul, a plant of the gourd kind, whofe feeds are ufed in medicine. TETRANTHERA, fo named by Jacquin, from TST^a, and av8>ip, becaufe of the four feparate cells, which have the appearance of four diftincl anthers, on the dilated fummit of each filament, and were indeed confidered as fuch by the 12 T E T author. We greatly prefer this name to that of Litfea, ufed by Lamarck and Jullieu ; becaufe the latter is of barbaroucs origin, and becaufe we are happy to follow the example of Mr. Brown, who juftly prefers, in this cafe, the claffical authority of Jacquin. To the learned Juflieii nevcrthelcfs belongs the honour of having firft afl^embled under this genus feveral plants, which authors had either confidered as diftindt genera, or erroneoufly referred to others already eilabliflied, as will appear by the various fynonyms we are about to exhibit. — Jacq. Hort. Schoenbr. v. i. 59. Dryandr. in Roxb. Coromand. v. 2. 25. Brown Prodr. Nov. HoU. V. I. 408. (Litfea ; Lamarck Dift. v. 3. 574. JufT. in Bull, des Sciences, v. 3. 73. Tomex ; Thunb. Jap. 10. Nov. Gen. 65. Schreb. Gen. 315. Willd. Sp. PI. V. 2. 839. Mart.* Mill. Didl. v. 4. Jufl". 440-. Hexanthus ; Loureir. Cochinch. 195. Sebifera ; Loureir. ibid. 637. See Tomex, Hexanthus, and Sebifera.) — Clafs and order, Dodecandria Monogynia. Nat. Ord. Lauri, JufT. Laur'mae, Brown. Gen. Ch, Cal. Involucrum of four or five ovate, con- cave, deciduous leaves, containing feveral ftalked flowers. Perianth none, unlefs the corolla be taken for fuch. Cor. of one petal, tubular, more or lefs deeply divided into from four to fix elliptic-oblong equal fegments ; fometimes ;;brupt and entire, the limb being deficient. Neftary of feveral fl;alked glands or fcales intermixed with the ftamens. Slam. Filaments from twelve to eighteen, fometimes but fix, thread-lhaped, eredt, the outer ones longeft ; anthers with four lateral cells at their inner fide. Pi/l. Germen fuperior, ovate ; ftyle thread-fliaped ; ftigma notched. Peric. Ben-y ovate or globofe, of one cell. Seed folitary , the ihape of the berry. Obf. The ftamens are ufually imperfeft in the flowers of one ti'ee, and the piftil in thofe of another ; but this is hardly a fufficient reafon for placing this genus in the clafs Dioecia, the ftrufture of the flowers being alike, and both organs, at leaft their rudiments, prefent in each. The four cells of the anthers, as Mr. Brown obferves, diftinguifli Tetranthera from Lauras. EflT. Ch. Involucrum of four or five leaves, deciduous. Corolla with about five fegments. Neftary of feveral ftalked glands. Anthers of four lateral cells. Stigma fomewhat lobed. Berry fuperior, with one feed. 1. T.japonica. Japan Tetranthera. (Tomex japonica ; WiUd. n. I. Thunb. Jap. 190.) — Stamens twelve. Leaves obtufe; downy beneath, as well as the involucrum. Flower- ftalks fimple — Common at Kofido in Japan, flowering in Oftober and November It is there known by the name of Fi-Ma. TheJIem is arboreous, tall, branching, above two feet in diameter. Branches downy, knotty ; angular when young. Leaves alternate, ftalked, oblong, obtufe, entire, ereft, with parallel ribs ; fmooth and green above ; hoary and downy beneath ; three or four inches long. Footjlalks angular, ftriated, downy, an inch in length. Flowers axillary, capitate, dioecious, on folitary, angular, downy, brafteated ftalks, half an inch long. The involucrum confifts of five or fix leaves, the outer ones fmalleft, and contains the fame number of flowers. Thunberg. 2. T. laurifoUa. Laurel-leaved Teti'anthera. Jacq. Hort. Schoenbr. v. i. 59. t. 113. (Tomex Tetranthera; Willd. n. 2. ) — Stamens about fifteen. Leaves obtufe, fmooth, as well as the involucrum. Flower-ftalks fomewhat umbellate. — Native of China. Cultivated at the Mauritius by the name of Cerifier de la Cliine, or Chinefe Cherry-tree. From thence it was brought to Schoenbrun gardens, where it beai's the open air in fummer, and flowers in the hot- houfe in September and Oftober It is there a tree, ten feet T E T ^ E T fi;et high, with a head of round knotty branches, downy when young. Leaves about the ends of the branches, alternate, on downy ilalks, an inch long, obovatc, coria- ceous, entire, light green, fmooth and Hiining, except a flio-ht pubefcence on the rib and veins ; their length about five inches. Floiver-Jtalhs lateral, fcattercd, below the leaves, umbellate, about two inches long, each bearing from two to h\e Jloiuers, whofe involucnim is pale green, corolla white; their fhort partial ftalks (within the involucrum) hairy, as well as the Jlamens. Berries red, globofe, the fize of a currant. Jacquin fays nothing of the dioecious nature of thejlowers, but he appears to defcribc one with an im- perfedt pi/lil. His fruit perhaps was of exotic grciwth. 3. T. apetala. Apetalous Tetranthera. Roxb. Coro- mand. v. 2. 2J. t. 147. Brown n. i. (Laurns involucrata; Retz. Obf. fafc. 6. 27 ?) — Stamens about fifteen. Leaves elliptical, obtufe, fingle-ribbed, fmooth. Corolla abrupt, undivided, bearing the ftamens on its margin. — Native of the mountainous parts of the circars of Hindooilan, flower- ing in June. Roxburgh. Mr. Brown met with the fame in the tropical part of New Holland. This is faid to be a middle-fized tree, with round fmooth branches, leafy towards the ends. The /eaves are ftalked, three or four inches long, and two, or two and a half, wide, entire, bright green. Fh'wer-JlalLs ufually three-flowered, much like thofe of the laft, to which this fpecies is nearly akin ; but the want of a limb to the corolla, and the oval violet-coloured berry, fuf- ficlently diftinguilh it. 4. T. monopetala. Monopetalous Tetranthera. Roxb. Corom. V. 2. 26. t. 148. — Stamens about nine. Leaves elliptic-oblong, acute, fingle-ribbed ; fomewhat downy beneath. Flowers cluftered. Limb of the corolla half five- cleft. — Native of the vallies of Hindooilan, flowering in the hot feafon. Dr. Roxburgh fays the imod is white, tole- rably hard ; and that the bark is ufed by the inhabitants of the hills, to cure diarrhoeas, being given in fubfl;ance. Its tafte is mildly aftringent, with much balfamic fweetnefs. The leaves ai'e longer, narrower, and more acute than in the former. Floiuers in fliort, axillary, denfe, partly umbel- late, clufl^ers, with five leaves to the involucrum, and as many fegments to the greenilh tubular corolla. Berries ovate, of a violet black. 5. T. ferrugiMa. Rufty Tetranthera. Brown n. 2. ( Hexanthus umbellatus ; Loureir. Cochinch. 196. Litfea hexantha ; Jufi". n. 4. ) — Stamens about nine. Leaves el- liptic-oblong, acute, fingle-ribbed ; downy beneath, as well as the branches. Corolla in fix deep fegments. — Native of Cochinchina, as well as of the tropical part of New Holland. A tree of a moderate fize, whofe timber is ufed in building. The leaves are large, entire, with many tranfverfe veins. Floiuers pale green, in fmall axillary umbels. 6. T. dealhata. White-leaved Tetranthera. Brown n. 3. — " Stamens fix. Leaves broadly elliptical, pointed, iriple-ribbcd, fmooth ; whitened beneath. Footllalks and branches downy. CoroUa deeply four-cleft, hairy. Invo- lucrum villous." — Native of the neighbourhood of Port Jackfon, New South Wales. Mr. Brown thinks Laurus Myrrha, Loureir. Cochinch. 251, which is perhaps not fpecifically different from Laurus involucrata, Roxb. Coro- mand. v. 2. 46. t. 187, is very nearly related to the prcfcnt fpecies, though differing in having fmaller leaves, a fome- what filky involucrum on a fliort ftalk, and nearly fmooth corolla. We cannot but obferve that Roxburgh's t. 187. by no means exhibits the peculiar anthers or neBary of a Tetranthera. His plant however fliould feem to be the Litfea trinervia of Juffieu, which the latter takes for Laurus involucrata of Retzius, but that fliould have fingle-ribbed leaves. See our third fpecies. 7. T. chincnfis. Chinefe Tetranthera. ( Litfea diinenfis ; Lamarck Dift. v. 3. 574. Jufl". n. 5.) — Stamens nume- rous, polyadelphous. Leaves elliptical, obtufe, fmooth. Footftalks, branches, and involucrum downy. Corolla none. — Native of China ; cultivated in the ifland of Mauri- tius, where its power of refifting the force of high winds, renders this tree valuable for making tall hedges. The leaves are four inches long, two broad ; pale beneath. Flowers dioecious. Involucrum of four concave, fpreading, downy leaves. Stamens united into from five to nine downy bundles. Germen furrounded with abortive ftamens. Berry fphcrical, fmooth, tlie fize of a fmall cherry, with a flavour of camplior and ivy, which renders it difagrceable, and only fit food for birds. Lamarck. This fpecies is faid to have been brought alive to Europe, and was in 1789 cultivated in the Parifian garden ; but we have neither heard nor feen any thing of it in England. 8. T.febifera. Tallow Tetranthera. (Tomex febifera ; Willd. n. 3, excluding the fynonym of Retzius. Scbiferaglu- tinofa ; Loureir. Cochinch. 638.) — Stamens from twelve to fifteen. Leaves ovate-oblong, bluntifli, fingle-ribbed, fmooth. Flower-ftalks umbellate, downy as well as the involucrum. Corolla none — For a further account of this fpecies, fee Sebifera, under which article Loureiro's faulty generic charafter, and efpecially his defcription of the fl:aniens, pre- vented our recognizing the plant as already defcribed by Willdenow. 9. T. piperita. Pepper Tetranthera. ( Litfea piperita ; .luff. n. 7. Laurus Cubeba ; Loureir. Cochinch. 252.) — Stamens fix. Leaves lanceolate, without rib or vein. Stalks fingle -flowered. Corolla in fix roundifli unequal fegments. — Native of Cochinchina, and perhaps alfo of China. In the former country it is frequently cultivated, for the fake of the cordial and tonic qualities of its berries and bark. A decoc- tion of one or the other, the latter being weakeft, is given in hyfteric, paralytic, and melanchohc dilorders. The recent fruit is ufed as a feafoning for fifli. The fcent is fragrant ; tafte aromatic and pungent. Each berry refembles a grain of black pepper, with a long flender ftalk. Loureiro fuf- peftedittobethe trueCubeb, but erroneoufly. (See Piper.) The tree is of a moderate fize, much branched. Leaves alternate, ftalked, two inches long, entire, flat, fliining, and, we prefume, fmooth. Flowers white, on crowded, lateral, fimple ftalks. Involucrum of four roundifli, concave, co- loured, deciduous leaves, containing five flowers. Style none. Berry globofe, very fmall, black. — Such is Loureiro's ac- count, from which, having feen no fpecimcn, we have ex- trafted the fpecific charafter. TETRANTHUS, fo called by profeffor Swartz, in his Prodromus, p. 1 1 J, from xt-r^a and a»9o;, on account of the four flowers in one com.mon calyx. — Sclireb. Gen. 592. Willd. Sp. Pl. V. 3. 2402. Mart. Mill. Dift. v. 4. Swartz Ind. Occ. 1385. t. 27 Clafs and order, Syngenefia Poly- gamia-Jcgi-egata. Nat. Ord. Compojita capitate, Linn. Corymbijeree, .luff. Gen. Cli. Common Calyx of five fmall, linear, fringed leaves, at firft reflexed, then creft, containing four flowers : partial of one leaf, tubular, niucli longer than the former ; tapering and fomewhat compreffed at the bafe ; obhque, acute and fringed at the fununit ; containing one floret. Cor. of each floret tubular ; its hmb in five unequal fegments, the three lowermoft longeft, and moft reflexed. Stam. in each floret. Filaments five, capillary ; anthers united into a cylindrical tube, rather ftiorter than the tube of the corolla. P'ift. Ger- men fuperior, in the tube of the partial calyx, oblong ; ftyle 3 G 2 thread- T E T thrcad-lliaped, divided, fprcading, loiigtT than the corolla ; Higmas lint-ar, downy, n-flexed. Perif. none, except the permanent (heathing partial calyx. Seeds folitary, oblong, fomewhat (Iriatcd, crowned with a membranous fringed border. Recrpt. minute, naked. E(T. Ch. Common C;Jyx of five leaves, containing four flowers : partial of one oblique leaf. Seeds with a mem- branous fringed border. Receptacle naked. I. T. Uttoralis. Shore Tetranthus. Willd. n. i. Swartz Ind. Occ. 1386. — Found on the banks of rivers in Hifpa- iiiola. A fniall annual herb, flowering in the fpring, and, as Swartz juftly obferves, very peculiar in its fructification. There certainly cannot be a better example of the order Poljgamia-fegrcgala. Willdenow fays it has tlie afpeft of MlTCHELLA ; fee that article. Thejlem is flender, creeping, fmooth, fubdivided, a fpan long, attaching itfelf by little tufts of long white fibrous radicles from eacli joint. Leaves oppofite, ftalked, roundilh-ovate, entire, with a Ihort obtufe point, three-ribbed, fmooth, half an inch long. Footjlalks fmooth and flender, nearly an inch in length. Floiuer-jlalls axillary, folitary, ereft, longer than the leaves, flender and downy. Flo-jjcrs fmall, white. TETRAO, in Ormthology, a genus of the Gallinse order of birds ; the charafters of which are, that it has a fpot near the eyes naked, or papillofe, or rarely covered with feathers. It comprehends fixty-feven fpecies, claffed under feveral divi- fions and fubdivifions. A. IVilh the naked Spot above the Eyes, and hairy Legs. Lagopodes. a. With four-toed Feet. Urogallus. With roundifh tail, and white axiUas. This is the cock of the wood of Ray and Willughby, and wood grous of Pennant and Latham. ( See Grouse. ) It is found in the foreils and marfhes of the colder parts of Europe and Northern Afia. Phasianellus. With wedge-(hapcd tail ; head, neck, and body above, teftaceous, and black-banded. This is the long-tailed grous from Hudfon's Bay of Edwards, long- tailed grous of Latham, and (harp-tailed grous of Pennant. Found in Hudfon's Bay and the uncultivated parts of Vir- ginia. Tetrix. With bifurcated tail, fecondary quills white towards the bafe. This is the urogallus minor of Briflbn and Gcfner, and black cock, black game, or black grous of Ray, Willughby, Pennant, and Latham. Found in the woods, heaths, &c. of the cold parts of Europe and Siberia. (See Grouse.) The varieties of this fpecies are the tetrix alba of Blum. Aft. Stock. 1785, and the urogallus minor punftatus of BriiTon, or tetrao hybridus of Sparrman, or fpurious grous of Pennant. Nemesiakus. With red tail, fpottcd witli black ; black tip, and body varied with black and red : the Nemefian grous of Latham. Betulinus. With black tail, varied with black tranf- verfe fpots ; and rump whitifli, with black bands : the birch grous of Lat-ham. Canadensis. With black tail-feathers, yellow at the tip, and two white ftreaks at the eyes : the black and fpot- ted heath-cock of Edwards, and fpotted grous of Pennant, Foriler, and Latham ; and gehnotte du Canada of Buffon. Canace. With entire tail, and white fpot near the ears and noftrils : the black and fpotted heath-cock of Edwards. Found at Hudfon's Bay. Lagopus. Cinereous ; hairy toes ; white quills ; black tail-feathers, tipped with white ; the intermediate white : T E T this is the white game of Willughby, and ptarmigan of Pen- nant and Latham. (Sec Ptarmigan.) Of this fpecies lliere are feveral varieties ; as the lagopus varia of Gefner and Willughby, the bonafia fcotica of BrifTon, and the atta- gen of BrifTon, or red game, moor-cock, or gor-cock of R.ay and Willughby, and red grous of Pennant and Latliam. ( See GoK-cocK. ) Found in Siberia and the northern parts of Europe. Albus. Orange, varied with black bands and white ftreaks ; hairy toes ; tail-feathers black, tipped with white ; the intermediate wholly white : this is the white partridge of Ellis and Edwards, and the white grous of Pennant and Latham. Found gregarious in the forefts of North Ame rica, Europe, and Afia. Rupestris. Orange, varied with black bands and white ftreaks ; plumofc toes ; black tail-feathers tipped with white ; the intermediate wholly white with black lores : this is the rock grous of Pennant. Found at Hudfon's Bay. Lapponicus. With naked fcaly legs ; with a fuperci- liary fcarlet line covered with a membrane of the fame co- lour ; the primary quill-feathers and tail-feathers tipped with wliite : the rehufak of the Arftic Zoology. Found in the woods and mountains of Lapland. CuPlDO. With fuccenturiate cervical wings : the attinga americana of Briflbn, and pinnated grous of the Arftic Zoo- logy and of Latham. Found gregarious in North Ame- rica. Umbellus. With the cervical umbo exftant : this is the attagen pennfylvanica of Briflon, the ruffed heath-cock of Edwards, and ruffed grous of the Arftic Zoology and of Latham. Found in North America. Togatus. With the greater axillary feathers black- azure : this is the bonafia major canadenfis of BrifTon, and ftioulder-knot grous of Eorfter (Phil. Tranf. vol. Ixii. ) and of Latham. Found at Hudfon's Bay. Bonasia. The tail-feathers cinereous, with black points and band ; the two intermediate excepted : this is the bonafia of BrifTon, the gallina corylorum of Gefner and Aldrovand, the gelinotte of Buffon, the hafelhuhn of Ray and Willughby, and hazel grous of the Arftic Zoology and of Latham. Found among the hazels of Europe and Weftern Siberia. Canus. Body grey, undulated with {irown ; the beak and legs black. Found in Sweden. Alchata. Above varied ; the two intermediate tail- feathers twice longer than the others, and fubulate : the ganga of Buffon, the partridge of Damafcus of Willughby and Ray, the kitiwiah or African lagopus of Shaw's Tra- vels, the kara of RufTel's Aleppo, the little pin-tailed grous of Edwards and Latham. Of this there are two varieties, •viz. the tetrao fenegallus and gelinotte of Senegal of Buffon ; and the tetrao caudatus of Gmelin's Trawels. Found in Southern Europe, Africa, Arabia, Syria, and Periia. Namaqua. Above fpadiceous, with the two interme- diate tail-feathers longer and fubulate : the Namaqua grous of Latham. Found in Africa amid the dry defarts inha- bited by the Namaquis, flying gregarious to fountains. Indicus. Front white, furrounded by a wreath behind black ; the body above yellowifh-red, varied with b,lack lu- nules : the Indian grous of Latham. Found at Coromandel. Arenarius. Ruff, abdomen, and vent black ; tail- feathers with brown and grey bands, tipped white ; the two intermediate yellowifh : the fand grous of Latham. Found about the Volga near Aftrachan. b. With three-iocd Feet. Paradoxus. With three-toed feet ; toes hairy, almoft joined TETllAO. joined at the apex ; this is the hetcroclitous grous of Latham. Found in the Southern Tartarian delart. B. ll^ilh pap'tUofe Shin about the Eyes ; and naked Legs. c. With the Feet of the Male /purred. PerdiCES, or Par- tridges. Francolinus. Abdomen and throat black, and wedge- formed tail : this is tlie tetrao orientalis of HafTdquift, and francolin of other authors. Found in the loutli of Afia and Europe, and in Africa, of the fizc of the partridge, feeding on feeds, emitting a hilling found, and flelli delicious. Madauascakiensis. Abdomen black, varied with large red fpots ; throat white ; the two intermediate tail-feathers reddilh, with black bands ; the pintido partridge of Latham. Found in Madagafcar. RuFUs. Legs and beak fanguincous ; throat white, furrounded with a band black, white pointed : this is the perdix grxca of Briflon and Ray, the bartavelle of BufFon, the red partridge of Albin, the Greek or great red par- tridge of Willughby, and Greek partridge of Latham. Of this fpecies there are three varieties, w'z. the tetrao ru- fus of Gnielin, or perdix rubra of BrilTon, or perdix rufa major of Gelner and Jonfton, or red-legged partridge of Ray, Willughby, and Albin, or Guerniey partridgfe of Latham ; the perdix rufa alba of BrifTon ; and the perdix rubra barbarica of Briflon, or the red-legged partridge from Barbary of Edwards, or Barbary partridge of Shaw's Tra- vels. Found gregarious in the woody mountains of Europe, Afia, and Africa, much larger than the partridge. Perdix. With a naked fcarlet fpot under the eyes ; tail ferruginous ; breall brown ; and legs whitifh : this is the common partridge, (which fee.) Of this fpecies there are the following varieties ; vi%. perdix cinereo alba of Briflon ; perdix tota alba ; perdix torque albo ; perdix brunnea ; perdix mento gulaqae, or chin and throat red. Found in flocks in the cultivated fields and paflures of Eu- rope and Siberia. Damascenus. With a naked fcarlet fpot under the eyes ; tail ferruginous ; breaft brown ; and legs yellow : the perdix damafcena of Briflon, and Damafcus partridge of Ray, Willughby, and Latham. This fpecies migrates in flocks through the middle of Europe, and is alhed to the partridge, but lefs, with a longer beak. Montanus. Legs and beak red ; throat reddifli and dingy : the perdix montana of BrifTon. Found in the mountains of Europe. RuBUicoLLis. Legs, beak, chin, and throat naked, all red : the red-necked partridge of Latham. Found in Africa. Petrosus. Beak and legs red ; body brown, and ferru- ginous fpot on the breaft : the rufous-breafted partridge of Latham. Found amid the rocks and mountains near Gambia. Perlatus. Legs and eye-brows red ; beak blackifli ; throat white ; and body varied with brown : the perdix chinenfis of Brilfon, and peai'led partridge of Latham. Found in China : and it has a variety with beak and legs brown, eye-brows fpotted with white and black, at the Cape of Good Hope. Bicalcaratus. With double-fpurred feet, and black eye-brows : the Senegal partridge of Latham. Found near the Senegal. Zeylonnensis. With double-fpurred feet ; beak and naked area of the eyes red ; tail round and brown : the Cey- lon partridge of Latham. Spadiceus. With twe-fpurred feet red ; beak yellow ; and body fpadiceous or bright red-coloured ; the brown Afri- can partridge of Latham. Found in Madagafcar. Nt'nicoi.i.is. With two-fpurred feet, and naked throat red ; the bare-iicckcd partridge of Latham. GiNCK ii.s. Bill black ; rump and tail red, grey, and black mixed ; and eye-brows white : the Gi»gi partridge of Latiiam. Found near Gingi, in Corpmandel. PoNDlCKHiANUs. Bill black; two intermediate tail- featliers red, numerous angulated lines brown ; and four bands ochre-coloured : the Pondicherry partridge of Latham. Found in Coromandel. N.EVius. Legs and bill reddifh ; body brown, varie- gated with yellow : the ococolin of Ray and Buffon, the Mexican partridge of Latham. Found in the temperate pans of New Spam. d. Coturnicss, or Quails. See QuAILS. e. With four Toes. Ferrugineus. Legs and beak brown ; body beneath diluted light red, above ferruginous-brown ; feathers of the neck longer and acutely tipped ; the hackled partridge of Latham. Found in China. Javanicus. Legs flelh-coloured ; front, fpot on the hind head, and abdomen, orange ; beak, breaft and tail cine- reous, varied witli black : Javan partridge of Latham. Found in the ifland of Java. ViRiDis. Green ; legs and beak reddifti ; area of the eyes red ; wings fpadiceous : the green partridge of Latham. Virginianus. With a black band above and below the eyes ; vertical line yellow ; the Virginian partridge of La- tham. Foinid among the trees of America. Marilandus. With white eye-brows ; neck pointed with white and black : the New England partridge of various writers ; the Maryland partridge of the Arftic Zoo- logy and of Latham. Found in America. Kakelik. Bill, eye-lids and legs fcarlet ; breaft ci- nereous ; back undulated with white and cinereous. Found in Bucharia, &c. Caspius. Cinereous, fpotted with light red ; the nof- trils, orbits, and temples duflcy. Found near Aftrabad, in Perfia. Mexicanus. Legs and bill fanguineous ; the fuperciliary line white : the coturnix ludoviciana of Briflon, colcui- cuiltu of Ray and Willughby, the Louifiana quail of La- tham. Found in Louifiana. Falklandicus. Variegated with brown fpots and curvated ftrias ; beneath white ; bill lead-coloured ; legs brown ; temples fpotted with white : Malouine quail of La- tham. Found in the Falkland iflands. Nov^B HiSPANiif'.. Legs and bill black ; crcfted iiead and neck variegated with white and black ; body and quill- feathers yellow, the latter tipped with white : this is the grand colin of Buffon, and Mexican quail of Latham. Found in New Spain. CoYOLCos. With yellow legs ; crown and neck fafciated with white and black ; body above yellow, varied with wliite. This is the coturnix mexicana of Briflon ; the coyoleo/.quo of Ray and Willughby, the coyolcos of Buffon, and Itlfer Mexican quail of Latham ; the eyes are black. SusciTATOK. Variegated with yellowifh, red, black and grey; bill longer. This is the coturnix javenfis of BrifTon, the coturnix indica Bontii of Ray and Willughby, the reveil-matin or caille de Java of Buffon, and noif^ quail of Latham. Found in the woods of Java. Striatus. With reddifh legs ; white eye-brows ; tail, tluroat, T E T tliroat, lower bread and abdomen black, white-guttated : the Madagafcar quail of Latham. Grisel's. With black legs and bill ; body dilutely and fordidly grey, black-banded : the grey-throated quail of Latham. Found iu Madagafcar. CoRO.MANDELici's. Head black ; vertex and ocular fafcia red and yellow ; throat white, furrounded with a black ftria ; body ftriatcd ; quill-feathers brown : the Co- romandel quail of Latham. Nov.'h; GuiNii/E. Brown ; greyifli legs ; black quill- feathers, the covers of the wings obfoletely yellow : the New Guinea quail of Latham. Manii.lensis. Above black ; legs and bill black ; throat white ; bread grey, fpotted black ; abdomen yellow, black-banded : the Manilla quail of Latham. Cristatup. The dependent cred and throat yellow : this is the quauhtzonecolin of Ray and WiUughby, the zone-colin of Buffon, the creded quail of Latham. Found in Guiana and New Spain. Sinensis. Body fpotted grey ; throat black, with a white bow : the coturnix philippenfis of Briflbn, and Chi- nefe quail of Edwards and Latham. Found in China and the Philippine ides. Coturnix. Body fpotted grey ; eye -brows white ; the margin and lunule of the tail-feathers ferruginous : the quail of Pennant and others. Of this there are two varieties, the coturnix major of Briflbn, and the coturnix wholly white. f. If^itfi three Toes. G1BRALTARICU.S, With pale legs ; black bill ; quill- feathers and tail black : the Gibraltar quail of Latham. Andalusicus. Red, variegated with black; beneath reddidi-white ; legs and bill flefh-coloured : the Andalufian quail of Latham. NiGRicoLLis. Body above cinereous, vai-iegated with red and black beneath ; legs and bill cinereous ; chin and throat black ; quill-feathers brown : black-necked quail of Latham. Found in Madagafcar. LuzoNNiENSis. Head, neck, and throat variegated with white and black ; throat and bread bay ; abdomen yellow- ifh ; legs and bill dilutely grey : the Luzouian quail of La- tham. Found in the Manilla iflands. C. Wit/} the Area about the Eyes covered tuith Feathers, but naked and tetradadyle ; TiNAMOu- GuiANENSis. With legs and bill brown ; back varie- gated with cinereous brown and blackidi dreaks ; throat ci- nereous ; abdomen palely orange and brown. This is the partridge of Guiana of Bancroft and Latham. Found in Cayenne and Guiana. Major. Legs yellowifh and brown ; bill black ; vertex red; body ohvaceous ; fpots on the back and tail black. This is the macucagua of Marcgrave, Ray, and Willughby, the magona of Buffon, the tinamou of Cayenne, the great tinamou of Latham. Found in South America, particu- larly in the woods of Cayenne and Guiana. CiNEREUS. Cinereous-brown : the cinereous tinamou of Latham. Variegatus. Legs and bill brown ; head and neck black ; body above variegated with tranfverfe hnes, light red and black ; beneath red ; throat and middle of the abdo- men white : the variegated tinamou of Latham. Found in Guiana. Sxrvi. Legs and bill yellow ; head and neck black ; body above brown ; beneath red : the little tinamou of La- iham. Found in Guiana. T E T TETRAODON, in Ichthyology. See Tetrodon. TETRAPETALOUS, in Botany, an epithet given to the flowers that confid of four fingle petala, or leaves placed around the pidil. Thefe M. Judieu cslh polypetalous flowers. Mr. Ray, who calls them tetrapetalous, makes them condi- tiitc a didinft clafs, which he divides into, i. Such as have an uniform tetrapetalous flower, and their feed-veflels a little oblongifh, which he therefore calls Jdiquofe. 2. Such as have their feed-veffels diorter, which therefore, for didinc- tion fake, he calls capfulatee ^xiAJlUcuIofx. 3. Such as have a feeming tetrapetalous flower, that is, a monopetalous one, divided deeply into four partitions, which he particularizes alfo as anomalous. TETRAPHARMACUM, T-Tpafap^iaKo», compounded of r{\p:, Jour, and >fs'.p,uKxoi', drug, or remedy, in the general denotes any remedy confiding of four ingredients. TETRAPHIS, in Botany, a name contrived by Hed- \rig, to cxprefs the four points by which the fringe of this mofs is peculiarly didinguidied. (See Fringe.) — Hedw. Fund. v. 2. 87. t. 7. f. 32. Schreb. Gen. 758. Sm. Fl. Brit. 1 1 79. Compend. 153. — Clafs and order, Crji/>/£)fa7n/a Mufci. Nat. Ord. Mufci. Ed. Ch. Capfule oblong. Fringe fimple, of four pyra- midal, ereft, unconnected teeth. 1. T. pellucida. Tranfparent Four-toothed Mofs. Fl. Brit. n. I. Compend. 163. Engl. Bot. t. 1020. Hedw. Sp. Mufc. 45. t. 7. f. I. a—f. S'lbth. Oxon. 275. Turn- Mufc. Hib. 13. (Mnium pellucidum ; Linn. Sp. PI. 1574. M. ferpilli foliis tenuibus pellucidis ; Dill. Mufc. 232. t. 31. f. 2.) — Capfule cylindrical. Leaves ovate, acute, fingle- ribbed Not rare in moid diady places, about the roots of trees, in various parts of Europe. It is annual, flowering early in the fpring, and ripening fruit in May. The whole mofs is of a bright tranfparent green. Root fibrous, matted. Stems modly fimple, an inch high, clothed with alternate, feffile, ovato-lanceolate, acute, entire, wavy, fingle-ribbed leaves, and each terminated by a fohtary _y?oTOfr. The mz[e Jlo-wers, far more abundant than the female, are little, round, dalked, powdery heads, each enveloped in three broad ovate leaves. The females, on a different dem, are lefs elevated, and more minute, each with from four to fix Jiyles, one of which only, as ufual, is prolific, and the cylindrical, fmooth, nearly upright capfule becomes elevated on a bright orange or crimfon dalk, an inch long. The tawny 'veil is torn at the bafe. Lid conical, reddifli, thin, not half fo long as the capfule. Fringe remarkable for its four rigid, poliflied, acute, pyramidal teeth, of a fliining brown, by which the genus was well charafterized, even when theprefent was the only known fpccies. Hedwig ob- ferved the flowers to be fometimes abortive, and replaced by buds. In the early fpring he now and then met with Jla- mens and pijlils in the fame flower. 2. T. ovata. Ovate Four-toothed Mofs. Mohr Ind. Crypt. 3. Sm. Compend. 163. Grimmia Browniana; Engl. Bot. t. 1422. Bryum Brownianum ; Dickf. Crypt, fafc. 4. 7. t. 10. f. 16. Orthotrichum Brownianum ; FL Brit. 1269.) — Capfule ovate. Radical leaves ligulate, ob- tufe, without a rib. — Gathered by Mr. R. Brown, by the river fide at Rodin, near Edinburgh ; and by the late Mr. WiUiam Brunton, on fand-done rocks at lord Grant- ley's lakes, near Ripon, Yorkdiire. The habit of the plant, and efpecially the ribbed veil, caufed us fird to refer our imperfeft fpecimen to Orthotrichum, till Mr. Sowerby thought he found the fringe to be that of a Grimmia. Mean- while Mr. Funk, a German botanid, afcertained it to be formcvl of four teeth onhy, conftituting a genuine Tetraphis, thus T E T T E T thus adding a Iccoiid fpccics to the cuiious genus before Ui. With refpett to habit, indeed, this has httle rcfemblancc to the original fpecies. It is a minute, browniOi, pcUueid mofs, whofe foliage is all over dotted or reticulated. The root feems annual. Sums none. Radical leaves few, ereft, li- near, very narrow, a little dilated upwards, obtufe, entire, without rib or vein : thofe which form njljeiil/j, at the bafe of the frmt/lali, (hort, ovate, acute, with a rib or keel. Siali red, fohtary, half an inch iiigli. Capfuk crcft, fmooth, ovate, brov^n. Lid fliort, with an oblique pomt. Fringe red, certainly of only four (liort, acute, firm teeth. TETRAPHOE, a name given by the people of Gui- nea to a plant, which they give in decodtion as a cure for fluxes. This plant grows alio in M;Jabar, where they ufe the i-oots boiled in whey for the piles ; and in the colic they give the root in powder, about a fcruple for a dofe. It is called In this latter place luellia cadavaUi, and by Petiver Kaiilhium Mdlabaricum capitulis lanugmofis. The ftalks of it are woody and hoaiy, efpecially about the tops. Its leaves ftand by pairs on (liort footftalks, and while young they are hoary underneath, with a very foft and velvety down ; the others are rough, like the fpotted lungwort, but feldom are fo large ; the flowers grow in fpikes, and confift each of fine green leaves filled with fcarlct filaments ; after thefe the fruit ripens, and is a fort of woolly bur, covered with foft and hooked prickles, very like the common Englifli bur- dock, but not of a third part of the fize. Phil. Tranf. TETRAPILUS, a genus of Loureiro's, in his Co- chinch. 6ll, named from Tslpa, and ^nXo?, a hat, or hood, becaufe the four fegments of the corolla end each in a hooded point. Every part of the dcfcription anfwers to the genus Olea, fee that article ; except that the flowers are dioecious (which indeed is of little confequence, fome of the known fpecies being /ubjeft to have the ftamens and pif- tils occafionally in fepai-ate flowers) ; and the berry is faid to have two cells, with feveral feeds. Though Olea there- fore is known to have two cells in the young germen, there being here more than one feed, mufl: reduce Loureiro's plant to Ligujlrjtm ; and it may prove very near L. japoni- cum, Thunb. Jap. 17. t. I, though fcarcely the fame fpecies. TETRAPLA, formed from TST^aTXo?, quadrupUx, four- fold, in Church Hijlory, a Bible difpofed by Origen, under foiu- columns, in each of which was a different Greek verfion, w.v. that of Aquila, that of Symmachus, that of the Se- venty, and that of Theodotion. Sixtus of Sienna confounds the tetrapla with the hexapla ; but the tetrapla is a different work, compofed after the hexapla, and in favour of fuch as could not have the hexapla. Some authors are of opinion, that the order in which the four verfions of the tetrapla were ranged, was different from that in which we have rehearfed them ; and particularly, that the Septuagint was in the firft; column ; but St. Epiphanius fays exprefsly to the contrary, and places it in the third. He even gives us Origen's reafon for putting it there, which was, fays he, that the bell verfion might be in the middle, that the others might be the more eafily confronted with it, and correfted from it. Baronius, however, in his Annals for the year 231, takes the Septuagint to have been in the third place in the hexapla, but in the firft in the tetrapla ; but Epiphanius gives it the fame place in both. See Hexapla. TETRAPOGON, in Botany, fo named by Desfontaines, from T£Tf«, and vuyMi, a beard, becaufe of the four awns •iflembled in each calyx — Dcsfoiit. Atlant.- v. 2. 388. Willd. Sp. PL V. 4. 898 Clafs and order, Polygamia Mo- tioecia, Desfont. and Willd. rdlhcr 7'riandria Digynia. Nat. Ord. Gramma. Gen. Ch. Cat. Glume of two nearly equal, oblong, membranous, fliining, awnlcfs valves, containing three flo- rets. Cor. of two valves ; the outer one keeled, abrupt, villous, with a h)ng, ftraight, terminal, fprcading awn ; inner fmaller, membranous, awnlefs. Stam. I'iiamentB three, fliort, capillary, deflexed ; anthers oblong, eniarginate, pendulous. Pi/]. Germen fmall, roundifli, liiperior ; flyles two, fliort ; iligmas feathery, oblong. Pcrle. none, except' the permanent corolla. Seed foiitary, invelled with the co- rolla, but not united to it. The terminal ^arc/ is iniperfcft, but both valves arc awned. Eir. Ch. Calyx of two valves, thrce-flowercd. Corolla of two unequal valves ; the outcrmoft abrupt, awned. Cen- tral floret imperfeft ; both valves awned. I. T. -villofus. Villous Four-bearded Grafs. Willd. n. i. Desfont. Atlant. v. 2. 389. t. 255 Gathered by Des- fontaines in fandy ground in liarbary, near Cafsa. The flem is ereft, about a foot high, knotty, leafy, a little com- prelFed, fmooth. Leaves linear, fmooth, narrower than their long flieaths, of which the uppermoft, in particular, is much inflated, embracing the bafe of the fpilr, which refembles that of a PoLvpoGON. (See that article.) The Jlomrrt .ve fefllle, difpofed in four ranks, on a flendcr zigzag com- mon ftalk, or receptacle, their copious yellowifli awns about half an inch in length, fpreading every way. The outer valve of the corolla is clothed with copious foft fpreading hairs. TETRAPOLIS, in Ancient Geography. See Car- PATHOS. Tetrapolis, Attica, the name of a country of Greece, N. of Attica ; in which, according to Strabo, were four towns built by Xanthus, when he reigned in this diftriil of Greece ; whence its name, from Ttri^y., four, and tc?,i.:, city. Tetrapolis, Dorica, a country of Greece, in the Do- ride, between the country of the Etohans and that of the Enianes, according to Strabo. Tetrapolis Syri/t, a country of Afia, in Syria, accord- ing to Strabo ; it contained four principal towns, which had the fame founder. TETRAPTOTE, Tetraptotox, in Grammar, a name given to fuch defedlive nouns as have only tour cales ; luch are aflus, &c. TETRAPYRAMIDIA, derived from 7,r^!,c, four, and •axi^ot.ljn:, a pyramid, in Natural Hi/lory, the name of a genus of fpars. The bodies of this genus are fpars influenced in their fliape by an admixture of particles of tin ; and are found in form of broad-bottomed pyramids of four fides. Of this genus there is only one known fpecies, \vhich is ufually of a brownifli colour, and is found in Saxony ; as alfo in Devonfliire, Cornwall, and other counties of England, where there is tin. Hill. TETRAPYRGIA, in Ancient Geography, a town of Cappadocia, in Garfauria Alfo, a town of Africa, upon the coaft: of Marmarica, before Portus-Phycus, according to Strabo. TETRARCH, TETRARCHA,T!7e.-..{;;(r,f, formed of T!'/f«, four, and a.^x^t rule, dominion, a prince who holds and go- verns the fourth part of a kingdom. Such, originally, was the import of the title tetrarch; but it was afterwards applied to any petty king or fovcreign ; and became fynonimous with ethnarch, as appears from the follow- T E T foUouing confiderations : i. That Pliny makes mentis of fix tetrarchies within the cities of Decapohs. 2. ihat Herod's kinedom was only dividc-d into three parts, which yet wore called tetrarchies, and the fovereigns of them ( Luke, iii. I . ) tctrarchs. 3. Jofephus Antiq. Jud. lib. xiv. c. 2 J. tells us, that, after the battle of Phihppi, Antony, going into Syria, conftituted Herod tetrarch ; and on me- dals the fame Herod is called ethnarch. TETRARRHENA, in Botany, fo named by Mr. K. Brown, from tst,:<, and ^■.(y.., male, on account of the very remarkable charader in this tribe, the grafles, of the four ftamens, which Mr. Brown fays he has afcertained by re- peated examination Brown Prodr. Nov. HoU. v. i. 209. —Clafs and order, Tetrandria D'igynia. Nat. Ord. Gra- minii. E(r. Ch. Calyx of two-valves, fingle-fiowered. Corolla double ; each of two valves, naked at the bafe. Neftary of two fcales, oppolite, alternate with the valves of the corolla. Stigmas feathery. The inflorefcence is a fimple, equal, fomevvhat racemofe fpike. Flowers awnlefs. 1. T. dyiichophylla. Two-ranked Tetrandrous Grafs. Br. n. 1. ( Ehrharta diftichophylla ; Labill. Nov. Holl. v. I. 90. t. 117.) — Flowers downy. Corolla ribbed, ob- tufe ; tlie outermoft. valve half the length of the reil. Leaves ftraight, hairy as well as their (heaths. Stem branched at the bafe Native of Cape Van Diemen. Thejlem is hardly a foot high, with many ereft leafy branches. Leaves lan- ceolate, acute, about an inch long, moderately fpreading in two ranks. Spiies folitary, ftalked, terminal, ereA, about an inch in length, fimple, the fio'vuers almoft all feffile, fpreading in two rows. 2. T. acuminata. Pointed Tetrandrous Grafs. Br. n. 2. — " Flowers fmooth. Corolla ribbed ; the outer glumes acute ; one valve rather (horter than the inner glumes ; the other longer, with a taper point. Leaves and their items fmooth. Stem branched." — Found by Mr. Brown in the fame country. 3. T. j«««a. Rufliy Tetrandrous Grafs. Br. n. 3. — " Flowers fmooth, imbricated. Calyx without ribs. Co- rolla ribbed, obtufe. Stem branched ; ftraight and fmooth like the leaves." — From the fouthern coaft of New Hol- and. Broiun. 4. T. Ixvis. Smooth Tetrandrous Grafs. Br. n. 4 — " Flowers fmooth, diftinft. Calyx ribbed, rather acute. Corolla obtufe, fmooth, without ribs. Stems fimple. Leaves fmooth, flat, rather lax." — Gathered by Mr. Brown in the fame country with the laft fpecies. TETRASARIUS, a word ufed by fome of the medi- cal writers, to exprefs half an ounce. TETRASPASTON, i{,(=L<7^y.roy, in Mechanics, a ma- chine in which are four pullies. See Pulley. TETRASTATER, TU^oLr-^^^, in Mcient Coinage, a Grecian gold coin of Lyfimachus, Antiochus HL, and of fome of the Egyptian monarchs. It was the quadruple chrufos (x;tJ!7o--), weighing about 530 grains, and current for 80 drachmas of filver, valued at about 3/., now worth 4/. fterling. Some v/eigh 540 grains, which may be owing to the gold of fuch being of more alloy ; though it may well be queftioned, fays Pinkerton (Medals, vol. i.), if they were ever meant to relate to the Attic ftandard. TETRASTICH, -rsxp-s-ixo', a ftanza, epigram, or poem, confifting of four verfes. TETRASTCECHON, in Botany, a term often ufed by the Greek writers, and generally mifunderftood by thofe who copy their accounts. Phny has made an error in the defcription of the euonymus, which has confounded T E T two dilTercnt llirubs together ever fince, by miftaking the- fenfe of this word, ufed by Theophraftus, in his account of it. He fays, that the fruit is divided within into four orders or feries of feeds ; tliis he exprefTes by the word tetrajlachon, which Pliny, fuppofing to be the fame with the word tetragonon, has trandated into granum quadranguh jigura. But this is by no means the fenfe of the word w^hich was ufed by the Greeks, to exprefs that a thing had Tsrafac TafEi?, four rows, orders, or feries of feeds in it : nor doe» it at all exprefs the feeds being fquare, much lefs its being fingle, for the original derivation of the word was from the term xxxa roi^ov, ufed in dances. Thefe were compofed of feveral feries of perfons, called f oi^o', Jlschi ; and every ftojchon confifted of feveral perfons, who all moved toge- ther. See Euonymus. TETRASTYLE, formed from rslpa, four, and ^r^^\'>^, column, in the Ancient Archite^ure, a building, and particularly a temple, with four columns in its front. TETRASYLLABICAL, a word confifting of four fyllables. TETRATHECA, in Botany, received that name from the writer of the prefent article, in allufion to the four cells of its anthers, the word being compounded of rsTpa, and ^mr,, a cafe, or cell. Mr. Brown indeed, in his General Remarks on the Botany of Terra AuftraHs, p. 12, offers fome obfervations tending to invalidate tliis name and cha- rafter. But it appears to us, that they both derive con- firmation from the confideration, of which we are well aware, that moft anthers have four cells when young, though, as they burft lengthwife, the partition of each cell is obliterated. Whereas the peculiarity of our Tetratheca, admitted by our intelligent friend, confirts in the four cells remaining un- altered, becaufe the pollen is difcharged by a terminal tube or orifice ; nor is it of any great confequence that he has found, in fome fpecies, the partition to be obliterated, in an advanced ftate of the anthers. Ceratopetalum, for example, is a good nsrae and a well-marked genus, though there is a fpecies deftitute of petals. With refpeft to the natural order, and the fituation of the fingular appendage to the feed, in the genus before us, we gladly profit by Mr. Brown's correftion, hoping to be pardoned, though we may have made feveral falfe fteps, in the totally ftrange wildemefs of New Holland plants, W'hich we were among the firft, with- out any guide, to attempt to lav open to botanifts — Sm. Bot. of New Holl. 5. Exot. Bot. V. I. 37. Willd. Sp. PI. V. 2. 321. Ait. Hort. Kew. v. 2. 347. — Clafs and order, 08andria Monogynia. Nat. Ord. akin to Polygalea, a new order to which Polygala is referred ; but in Mr. Brown's opinion conftituting, along with another genus, a ftill differ- ent order, which, from the name deftined for that genus, he choofes to denominate Tremaxdre.e, of which we pro- pofe to treat in its proper place. Gen. Ch. Cal. Perianth inferior, in four deep equal fegments, deciduous. Cor. Petals four, obovate, equal, many times longer than the calyx. Stam. Filaments eight, inferted into the receptacle, very fhort, equal, erect, fimple ; anthers terminal ; oblong, fomevvhat curved, much fhorter than the corolla, with four longitudinal furrows, and as many cells, and terminating in a fimple tubular beak, through which the pollen is difcharged. Pifl. Germen fuperior, very fmall, obovate, compreffed ; ftyle vertical, cylindrical, fimple, liardly fo long as the anthers ; ftigma fimple. Peric. Capfule obovate, compreffed, of two cells and two valves, the partitions from the middle of each valve. Seeds one or two in each cell, oval, pendulous, with a naked fear, but crowned, at the oppofite end, with a twifted creft. Efl. T E T T E T EfT. Cli. Calyx four-cleft, inferior. Petals four. An- genera are more peculiar, or more elegant, than Telratbun tlicrs beaked, with four cells. Capful>.' of two cells and and the fpecies are all wortliy of a place in our colkctioiis. two valves, with partitions from their middle. Seeds TETRATONON, is the Greek n.ime of an interval of crefted, about two in each cell. four torn s ; wliicli in modern mulic is ufually called the fuperfluous or iliarp fifth. 1 ETR AX, in Ornithology, tlio name of a bird of the olis or bullard kind, called by fome authors amis campeflrh, or the field-duck, and alfo little bullard ; and by fome others, the caiiiiti. See Otis. It is a very common bird in France, where it is called canne patnere: it is called anas, from its fitting on the ground, juft as the duck does on the water. It is of the fize of a pheafant, and has a beak like that of the common I. T. juncxa. Ru(hy Tetratheca. Willd. n. l. Ait. n. I. Sm. Bot. of New Holl. 5. t. 2. — Smooth. Leaves alternate, lanceolate. Stem with (harp angles. Branches elong.ated, and almoll naked Native of New South Wales, from whence we received drawings and fpecimens, through the hands of Dr. John White, foon after the fettlcmcnt of the colony there. This plant was fent to Kcw, by Mr. Peter Good, in 1803, and it is marked as flowering in .lulv and Auguft, being kept in the greenhoufc in winter. The root is woody, fmall, perennial. Stems fomewhat flirubby, much branched even from the bafe ; the branches long, (lender, very acutely angular, fo as to be almoft winged, leafy, fmooth like every other part. Lea-vis generally few and fmall, acute, feffile, entire, with a llrong mid-rib. Slipulas none. Flowers fcattered along the branches, on fimple folitary red ftalks, about an inch long, each from the bofom of a diminifhcd leaf, and making a very elegant appearance. hen. It is taken with nets, as the partridge : it runs very fwiftiy, and, like the bullard, has no hinder toes. Its belly lly IS wliite, and its back is variegated with grey, red, and black. It feeds on vegetables, and on fmall infers. TLTREUMA, in Botany, a name given by the people of Guinea to a fpecies of (hrub, very common among them, and ufed to cure whitlows. They dry the leaves, and reduce them to powder; and, moiftening them with any The calyx is red. Petals crimfon or rofc-coloured, three- liquor, apjily then> to the place. Petiver has called this Anthers purplidi-brown, tipped a variety with white petals, the fourths of an inch long, with yellow. We have calyx M\AJliill-s of which preferve their ufual colour, 2. T. erkifolia. Heath-leaved Tetratheca. Sm. Exot. Bot. V. I. 37. t. 20 Leaves whorled, linear, revolute, minutely toothed. Stem rough with afcending brillles. Flower-llalks and calyx verv fmooth. From the fame country as the forec and fent, with drawings, at the fame time. This is of more humble growth than T. juncea, and much more leafy. The leaves are four, five, or more, in each whorl from top to bottom of the ilem and branches, feffile, narrow, about half an inch long ; their edges, and fometimes their upper furface, near the point, rough with arbor Gu'inceufis laurujlhu facie, from its great likenefs to the common (lirub which we call the laurufline. The leaves are opaque and Rill', and are an inch and a quarter broad, and two inches and a half long. Tlicfe Hand alter- nately on all fides of the llalk, and are fixed on fhort pedicles. Tlie flowers grow out of the bolbnis of the leaves, and Hand in clulters in the manner of thoi'e of tlie common lauruftine. Phil.Tranf. N°232. TETRICA, in AncienfGeography, a town of the Sabines, placed by Varro in the environs of mount Fifcellus, which lay northward. Servius on Virgil fays, that it belonged to Picenum, becaufc in his time, its limits had been changed. The Abbe Chaupe places it where we now find Leoneffai minute teeth. Floivers rofe -coloured, drooping, about half There we find the terrible rocks, horrentes rupes, mentioned the fize of the foregoing, on fimple, folitary, axillary ftalks, by Virgil. as long as the leaves. Anthers purple, with yellow tips, badly reprefented by the engraver, who miftook the original drawing of the feftion of an anther, for the germen, and altered it accordingly. Capfule ovate, emarginate. Seeds with a fmall white creil:, mollly two in each cell. 3. T. glandulofa. Glandular Tetratheca. Sm. Exot. Bot. V. I. 39. t. 21 Leaves imperfeftly whorled, lanceo- late, revolute, toothed with little ipines. Stem downy. Flower-ftalks and calyx rough with glands. — Sent inter- mixed with the la(l, from New South Wales. The fpe- cimens of both appeared to have been burnt down to the ground, probably by fires made by the favages in the woods. TETRICUS Mons, a fcraggy mountain of- Italy, in the country of the Sabines. Pliny. TETRINA, in Geography, a town of Ruffia, in the government of Archangel, near the White fea ; 100 miles N.N.W. of Archangel. TETRIX, in Ornithology, a fpecies oi tetrao ; which fee. TETRODON, in Ichthyology, a genus of the Branchiof- tegi order of fifhes, according to the arrangement of Gmelin ; the characters of which are, th.at the jaws are long, divided at the tip ; the branchis or gills have a linear aper- ture ; the body is roughened beneath, and the ventral fins are wanting. The fiihes of this genus, like the Chiodon, and had grown up again ; which proves them to be perennial have the power of inflating their bodies at pleafure, by plants, though fcarcely (hrubby. The fize of the prefent fpecies, and its general afpcdl, agree with T. ericifolia, but the corolla and antljers zre of a darker tint. The _/?fm is clothed with very fhort clofe down, by no means briftly ; whWe ilie Jlower-flalis and calyx, inftead of being fmooth, are covered with glandular hairs. The leaves are rather broader, and lefs whorled, being often merely oppofite, or even difperfed. 4, T. thymifoUa. Thyme -leaved Tetratheca. Sm. Exot, Bot. V. 1. 41. t. 22. — Leaves whorled, lanceolate, toothed means of an internal membrane, and during this time the fmall fpines of the fides and abdomen rife fo as to be a defence againft their enemies. They live principally on cruftaceous and tellaceous animals. Gmehn enumerates thirteen fpecies. ScELERATUS ; the Noxious Tetrodon. Tetragonal, with very large head ; length two feet or more. Found in tho American and Pacific oceans, and confidered as highly noxious, producing, when eaten, very fevere fymptoms. Testudineus ; a Tortoife-fliell Tetrodon. Abdomen with little fpines. Stem, flower-ftalks, and calyx rough plane, fmooth, and back with white curved futures ; length with afcending briftles. — From the fame country. Rather two feet ; colour rufous-brown above, marked by numer- larger than either of the two laft, and readily diftinguiftied, ous round pale blue fpots ; beneath blueifli or afh-colourcd, at firft fight, by its broader lefs revolute leaves. The beautifully varied by longitudinal brown ftreaks ; fins and briftly hairs clothing the fower-Jlalks and calyx are its pecu- tail bright ferruginous ; the whole abdomen is furniflicd liarly diftinguifbing character. The fotuers are of a fine with numerous fmall fpines, which, when the animal is un- crimfon, with violet anthers, whofe tips are yellow. Few difturbed, are imbedded in correfponding cavities in the ikin, Vol. XXXV. 3 H but T E T but elevated, when the fi(h is alarmed and difturbs its body. Found in the Indian feas. Lacocephai.us ; Hare Tctrodon. Abdomen acule- ated; fmooth body, and prominent (lioulders; length twelve inches ; tliick in front ; hinder parts tapering fuddenly to- wards the tail ; eolonr above yellowilh-brown, beneath wKitilh with a filvcr)- cafl ; acrofs the back marked with flioit, black, or dark-brown bars, and over the fides with many, fcattered, round, blackilh fpots ; fides and abdomen befet with radiated fpines ; fins fmall, and tail (lightly rounded. Found in the Indian and American feas ; and ftraying into northern latitudes, are taken about the Britifh coaits. This filh has the power of inflating the abdomen to a lai-ge fize ; and derives its name from the refemblance of its head to that of a hare. LiN'EATUS. With brown and pale bands ; length ten or twelve inches, fquaie fiiape ; and wlien inflated, like the lall ; body befet with fmall fpines ; colour grey on the ab- domen, with longitudinal, deep-brown llreaks ; fins and tail as in the laft fpecies. Found in tlie Indian and Ame- rican feas, and alfo in the river Nile. Electricus. With red, green, and white fpots ; above brown, and beneath fea-grcen ; yellow at the fides, and green fins ; length feven or eight inches ; eyes large, with red circles. Found in the Indian and American feas, among coral rocks ; and when touched with the hand, affedting it vfith an elettric or galvanic fhock. OcELLATU.s. Ocellatcd on the fhouldcr-band • length fiK or eight inches ; thick, ovate fhape, contracting towards the tail ; colour deep green above, paler on the lides and ab- domen, which are whitifh ; acrofs the middle of the back, as far as each peftoral fin, a broad black crefcent, edged with yellow ; dorfal fin fituated on a round black fpot with yellow edges ; lateral line from beneath the eyes to the tail, which is fmall and roundilh ; under parts befet with many fpines. Found in the Indian feas and adjoining rivers, particularly thofe of China and Japan ; very poifonous in its nature, and it is prohibited to be eaten under very fevere penalties by the emperor of Japan. Spengleri. Head bearded with many cirri ; length- ened (hape ; above brown-coloured, with roundifh deep brown fpots ; abdomen tumid, whitifli, and befet with fmall fpines ; with cirri or foft prominences difperfed about the upper parts of the body. Found m the Indian feas, ten or twelve inches in length Hankenii. With lower jaw longer than the upper ; length eight or ten inches ; like the former in general ap- pearance ; above brown-coloured, with fmall whitilh clouds or fpots ; beneath whitilh, with fmall fpines. Found in the Indian feas. Oblokgus. Oblong, with equal jaws ; length fix inches ; lengthened fliape ; colour whitilh, with grey back, marked by many femi-decurrent brown bands ; fins and tail cinere- ous ; two lateral lines, one near the back, the other near the abdomen. Found in the Indian feas. RosTRATUS ; Snouted Tetrodon. Both jaws elongated to the beak ; length a few inches ; oblong-ovate (hape, con- trafting towards the mouth and tail ; fnoiit lengthened and (lightly tubular; colour bluei(h-brown, beneath whiti(h ; fore-part of the abdomen befet with fpines, few over the back; fins brown. Found in the Indian feas. La;viGATUs; Smooth Tetrodon. With the abdomen aculeated m front ; a large fpecies ; blueilh above, with two white ftnpes on each Me ; under parts white ; from the mouth to the end of the pectoral fins aculeated ; the other parts being fmooth. Found in the American feas. HlSi»lDUS. Entirely hifpid, with briftly papilla: ; length T E T two feet ; (hape, when inflated, like that of T. lagocephalus ; colour whiti(h ; upper parts marked acrofs the back by three or four femi-decurrent brown bands ; whole body befet with fmall fpines. Found in the Mediterranean and Indian feas. Small remains of this fpecies are faid to occur among the petrifadlions of mount Bolca near Verona. MoLA. Unarmed, (harp, comprefTed, rounded ; a very fliort rounded tail-; dorfal fin annexed to the anal, with oval fpiracles. (See SuN-i^j/Zi. ) Dr. Shaw has made a diftifidt genus of the fun-fi(h under the r.ame of cephalut, the cha- rafters of which are, that the jaws are bony, and body ter- minating abruptly, fo as to refemble the head of a fi(h. This genus comprehends the mola, or (hort fun-nih; the ob- long fun-filh, with truncated body, or oblong diodon of Pennant (fee SuN-F//Zi) ; the variegated, with whitifn un- dulations and fpots ; and the Pallafian C. or filvery fun-nili, with browniih back, and fpiny carinated abdomen. The mola, or ihort fun-fi.{h, is a native of the European feas. Its general colour is brown, with a (ilvery caft on the iides and abdomen ; the (Idn rough ; the peAoral fins fmall, rounded, and placed horizontally ; the dorfal and anal fins placed oppofite, and of a lengthened (hape, with rounded tips continued into the tail-fin. This fiih is fometimes leen lying on its fide, on the furface of the water, when it may be eailly taken. In the Northern feas it arrives at a vail fize, of the length of eight or even ten feet, and 500 pounds in weight : it is fuppofed to feed principally on (hell-filh, and in the night it is faid to exhibit a high degree of phof- phoric fplendour. Ot this there is a variety, viz. the iruncaius, unarmed, fmooth, comprefled, oblong, with a very fhort tail, the dorfal and anal fins annexed, with lunated fpiracles. This is the oblong fun-fi(h of Pennant. Stellatus ; Spherical Grey Tetrodon, V/hiti(h be- neath, with the body befet with radiated fpines : the tetro- don etoile of Cepede. Length twelve or fourteen inches ; (hape, when inflated, nearly fpherical ; colour greenilli, deeper on the back, marked with duflcy fpecks ; under parts whitiiTi ; vent furrounded by a black circle ; whole body covered with fmall fteUated or radiated fpines ; dorfal fin rounded at the tip, and attached at the bafe by a kind of footflalk ; tail oval. Found in the Indian feas. Shaw. FuNCTATUS ; Spherical Brown Tetrodon. With black fpecks, whiti(h abdomen, and very narrow dorfal fin : the tetrodon pointelle of Cepede. Refembling the former. Found in the Indian feas. Shaw. Meleagris ; Pintado Tetrodon. Brown, fpeckled with white. Found in the Indian feas, and when taken, making a kind of grunting noife, like feveral others of this and neighbouring genera. TETSCHIN, or Tetzim, or Diet/chin, in Geography, a town of Bohemia, in the circle of Leitmeritz, on the river Elbe; 15 miles N. of Leitmeritz. N. lat. 50° 46'. E. long. 14° 17'. TETSI, a town of Thibet ; 27 miles E. of Lada. TETT, a place now in ruins, fituated to the fouth of Azamore, on the northern extremity of the bay of Maza- gen, in the empire of Morocco ; the name fignifies in Arabic Titus, and is therefore fuppofed to denominate the ruins of Titus, founded by the Carthaginians. TETTER, a difeafe among animals, which is of the ring-worm kind, and which runs or fpreads itfelf upon the ftin in different direftions, whence probably it has received the name. It attacks different parts, but is mofl commonly met with on and about the rump, not unfrequently running down upon the joints of the tail for fomc diftance. It is of a fcabby itchy nature and appearance, and when neglcdledj T E T aegle£ted, is faid to have fometimes become of the quality of canker, in feme forts of animals. In cafes where it fixes upon the more flcfhy parts of the bodies of the ani- mals, it is often attended with fuch troublefomc itchings, as to caiife them to rub tliemfelves agaiiilt poRs, walls, aJid other places, until they rub off and deflroy the very hair and llcin of the parts. Nay, the animals will, it is faid, fometimes even tear off the flefli with their teeth, if they can come at the parts. The cure of the difeafe may moWy be accoraplifhed by the ufe of a ball compofed of from half a drachm to a whole one of calomel, or more, according to circumilances, in union with fome fort of cooling purgative powder : or a powder conftituted of crude antimony, aethiops mineral, and cremor of tartar, of each about half an ounce ; which fhould be given once or twice a day in a quart of oat -meal gruel. At the fame time, wartiing the parts well with Gou- lard water, and afterwards applying a little of an ointment compofed of fulphur, blue ointment, and hog's4ard to them. The animals fhould be well taken care of while the cure is going on. TETTIGES, TETliytf, grafshoppers, in Antiquity., a title the Athenians affumed to themfelves. See Gegenes. TETTIGOMETRA, m Entomology, a name by which the ancients called the nymph of the cicada, or tcttyx ; and they named this nymph, from which they frequently faw that fly hatched, tdtigometrci, which fignifies the mother cf the cicada. See Harvest-F/v, Cicada, and Vegetable- Fly. TETTIGONIA, a word ufed by the ancients to ex- prefs the fmallcr fjjccies of cicada, with which they were acquainted. They called the larger achcta. It is generally fuppofed, that the tettigonia was the fame with our fmalleft kind, called by the French fija/on ; but M. Reaumur obferves, that as the ancients knew two kinds of the cicada, we know three ; and that our middle one fecms to have been their tettigonia or fmall cicada, and that they were not acquainted with our fmallefl kind, or cigalon, which is not larger than a hornet. TETTIGONIA of Linnxus. See Gryllus. Tettigonutj of Fabricius. See Cicada. TETTNANG, in Geography, a town of Germany, and principal place of a lordlliip of the fame name, united with Montfort, ceded to Bavaria by the peace of Prefburg ; 8 miles N. of Lindau. TETTOVA, a town of European Turkey, in Mace- donia ; 13 miles W. of Skooia. TETTUA-MOTU, a cape on the E. coaft of New Zealand, the N.E. point of Poverty bay. N. lat. 38° 36'. W. long. 181° 30'. TETUAN, Tetawan, or Tetteget, a town of Africa, in the empire of Morocco and province of El Garb, fitu- ated near the river Bufega, about a league and a half inland from the Mediterranean, and inhabited by Moors and Jews ; who for the moft part fpeak a corrupt Spanilh, in which lan- guage their commercial negociations are tranfafted. They are genteel in their perfons and polite in their manners. The environs of Tetuan are planted with vineyards and gar- dens, which arc kept in good order, and which produce more excellent fruits than thofe in other parts of the em- pire. From the raifins and figs the Jews diftil an ardent fpirit (called Mahaya), which, at the age of a year, refembles the Irifh ufquebaugh, and it is preferred to Englifll brandy and rum. Of this they drink immoderately, and generally take a glafs before eating. Leo Africanus attributes the foundation of this town to the people of Africa. It was 1' E U afterwards cmbellilhed, and the population iiicreafcd, wiicu the Moors were driven out of Spain. This was the place of relidcnce for many of the confuls of the European powers, till the year 1770, when the reigning emperor, Seedy Mahomed, would no longer permit them to remain, nor again to ciLibhfh themfelves in the place. The port of this town has kept a trading communication with Gibraltar, whence the fhips come to viftual, when the wind is in the weft, and^ does not allow them to make Tangiers. The Oiore of Tetuan is only fafe when the wind is in the weft, at which time (hips ride fecurely ; but when it veers to the caft, they muft remain here no longer. Our fleets often viftual and water here, and this was the cafe with that of the immortal Nelfon, pre\-iouny to his viftory in Aboukir bay. Tetuan is faid to contain 1 6,000 people ; 30 miles S.E. of Tangiers. N. lat. 35" 30'. W. long, f 20'. TETYAN Head, a cape on the W. coaft of the i/land of Mindanao ; near which is a harbour that may be entered without danger. N. lat. 7° 20'. E. long. 124° 36'. TEVAKUN, a town of Perfia, in the province of Kho. raffan'; 45 miles E.S.E. of Mefchid. TAVARA, a town of Naples, in Capitanata ; 5 miles N.E. of Volturara. TEUBER, or Teuberinn, Elisabeth, in Biography, a celebrated German opera finger, and kltve of the famous Tefi. She was chiefly attached to the court of Vienna, where fhe refided in 1772. She had fung at Naples in 1769 with great applaufe ; but was peremptorily ordered by her phyficians never to fing again. Her health had been fo much impaired in Ruifia, where (he had remained three years, that the whole faculty was unanimous in pronouncing that the exercife of hrr profeflion would be fatal. How- ever, in fpite of this prediction, (he afterwards recovered her health and voice fufficiently, in a journey to Italy, to appear again on the ftage at Naples in 1785 ; where, finding that her voice hid fomewhat lowered its pitch, (he performed the principal man's part in contralto, to the entire fatis- faftion of the public. She was the daughter of a famous violinift in the emperor's fervice ; (he had lefibns in finging from HafFe, in ading from the Tefi, and often fung in the operas of Haydn at Efterha2i. TEUCHERN, in Geography, a town of Saxony, in Thuringia ; 18 miles S.W. of Leipfic. TEUCHITES, in Botany, a name ufed by fome for ihe fcananth or fchananih, camel's hay, which ought to be written teuochitis. There is a city Teuochis in Egypt, near the borders of Arabia, and the geographers all mention a lake in the neighbourhood of this city ; in this lake it is probable the fcnccnanth might grow ; and being gathered there, and fold in the adjoining city of Teuochis, the purchafers might diftinguilh it with an epithet formed of the name of the place where they bought it. See SccE- NANTII. TEUCHTLACOT-ZANHQUI, in Zoology, a name by which the natives of fome of the American nations call the rattle-fnake. TEUCRIUM, in Botany, an ancienf. name, whether ap- plied to any fpecics of this genus, or of any other, becaufe the plant was difcovered by Teucer the Trojan prince, or^ dedicated to him, or found in the country of Troy, fome- times called Teucria, we muft humbly profefs our inability to form any opinion or corjefture Linn. Gen. 287. Schreb. 384. WiUd. Sp. PI. v. 3. 13. Mart. Mill. Did. v. 4. Sm. Fl. Brit. 606. Prodr. Fl. Gra;c. Sibth. v. i. 390. Ait. Hort. Kew. v. 3. 365. Schreb. Unilab. 26, Furfli 405. Tourn. t. 98. Jufl". 112. Lamarck Illuftr. t. jci. (Pclium; Tourri. t. 97. Chamiedrj's ; Tourn. 3H2 t. 97.) TEUCRIUM. t. 97-)— Chfs and order, D'ulynnmia Gymno/penim. Nat. Ord. FerlicilliiLe, Linn. Labuit.t, .Tiid". Gen. Ch. Cal. Perianth inferior, of one leaf, cloven bah" way down into live acute, nearly equal, fegments, gib- bous on one fide at its bafe, permanent. Cor. of one petal, ringent. Tube cylindrical, ihort, ending in an uicurvcd throat. Upper lip ered, acute, divided throughout nito two diftant fegments, divaricated towards each fide : lower fpreading, three-cleft; its lateral fegments rcfembling the upper lip, ne.-ir)y ereft ; the central one roundilli, and very large. Slam. Filaments four, awl-ftaped, longer th.m the upper lip of the corolla, afccnding, curved, prominent be- tween its divifions ; antliers fmall, incumbent. Pift. Ger- men fnperior, deeply four-lobed ; ftyle thread-fhaped, agree- ing with the ftamens in fize and pofition ; rtignias two, (len- der, acute. Peric. none, the unchanged calyx containing the feeds in its concave bafe. Seeds four, roundifli, reticu- lated or wrinkled. Eif. Ch. Upper lip of the corolla deeply divided, beyond its bafe, divaricated. Stamens prominent. Obf. The upper lip of the corolla being fo deeply di- vided, even below its bafe, into the tube itfelf, and its feg- ments fo far afunder, there feems to be no upper lip at all. The latter however is more truly the cafe in Ajuga, to tvhich, and not to Teucrium, belongs the Chamnpitys of Tourncfort ; its upper lip being, in a manner, cut away. Teucnum of Tourncfort has a bell-fhapcd calyx, and the middle fegment of the lower lip of its corolla concave. Pol'ium of the fame author has its flowers coUefted into denfe terminal heads. His Gbamiidrys has axillary flowers, and a tubular calyx. Marum of Boerhaave has tiiyme-like leaves, and a peculiarly pungent fmell. Scordium of Ray and Rivicus has the odour of garlic, ha of Dillenius has the calyx very protuberant at the lower part. All thefe neverthelefs form together a mod natural and well-defined genus, whofe qualities are more or lefs aromatic or bitter ; its habit ufually herbaceous, moftly perennial, often flirubby ; leaves oppofite, fimple, though in fome inftances much divided ; pubeicence various, but hardly ever abfent ; flowers blue, red, yellow, or whitifli, axillary, folitary or whorled, pauicled or capitate ; their in- curved ftamens and flyle always very confpicuous between the divifions of the upper lip. Thirty -five fpecies are enumerated in the fourteenth edi- tion of Linn. Syft. Veg. from which Chamitpitys, ha and falkifoUuin are to be removed to Ajuga. Willdenow, after making thefe deduftions, has fixty-four. He follows Schre- ber and others, in making many more fpecies out of the allies of Poll urn, than Linnaeus would ever allow to be more than varieties. Two new ones from Crete are added in the Prodr. Fl. Grsec. The genus is generally European, but not entirely fo, and for the moft part inhabits warm funny climates. No attempt has been made to diflribute it into feftions. We fliall indicate fome traces of fuch, as we feleft the more curious or remarkable fpecies for illuftration, de- fcribing all the Briti(h as well as the new ones. T. campnnulatum. Bell-lhaped Germander. Linn. Sp. PI. 786. Willd. n.'i. Ait. n. I. (T. fupinum, perennc, palufl;re, apulum, glabrum, foliis laciniatis, flore albo ; Till. Pif. 163. t. 49. f. I.) — Leaves many-cleft, nearly fmooth. Flowers axillary, folitary. Calyx awned. Stem procum- bent.— Native of moift fituations, in Italy and the Levant, Miller appears to have cultivated it in 1728, but the true plant is now fcarcely to be feen in our gardens, and is little known to botanifts. The fynonym of TiUi has no right to be marked as a variety, anfwering exaftly to the Linnxan fpecimens and defcription, nor do we find any other fio-ure -^f this fpecies. Schreber feems to have mifled Willdenow, to quote a fynonym of Rivinus, which has no exifteiicc. This we find tranfcribed into Hort. Kew. with a correftiou of t. 14 for 24 ; though nothing but 7'. Botrys is there to be feen. No lefs incorreftly is Rivinus, t. 19, cited by Willdenow, after Schreber, for 7. orientak ; as Dr. Sims has noticed in Curt. Mag. 1279. ■^* eampanulatum is a very diftinft, perennial, herbaceous, nearly fmooth, fpecies, whofe Jlcms are fquare, leafy, more or lefs prollrale and creeping. Leaves an inch long, twice three-cleft, with bluntifli, notched, nightly revolute fegments. Floiuers axillary, folitaiy, op- pofite, ftalked, with a large, bell-ihaped, rather pungent- pointed, calyx. The corolla is faid to be white. T. Ix'vigatum. Smooth Yellow Germander. Vahl Symb. V. T. 40. Willd. n. 2. — Quite fmooth. Lower leaves many- cleft ; upper three-cleft, entire. Flowers axillary, folitary. Segments of the calyx oblong, without awns. — Gathered at Montevideo, by Commerfon, whofe fpecimen is before us. This fpecies is larger in all its parts than the foregoing, and appears to be herbaceous and ereft, quite fmooth, ex- cept a flight downinefs, here and there, upon the young branches or ftalks. Leaves ftalked, an inch and half leng, deeply divided into three wedge-fltaped, jagged, blunt, very fmooth and flat, lobes ; the upper, or floral, ones much fmaller and narrower, limply three-cleft. Flowers yellow. Segments of the calyx oblong-lanceolate, with one central rib and two marginal ones, acute, but not tipped with any awn or briilly point. T. onentale. Great-flowered Germander. Linn. Sp. PI. 786. Willd. n. 3. Ait. n. 2. Curt. Mag. t. 1279. (T. orientale anguftifolium laciniatum, flore magiio fubcteruleo ; Comm. Rar. 25. t. 25.) — Leaves deeply tliree-cleft, many- cleft, linear. Clufters terminal, compound. Flower-llalks horizontal, longer than the floral leaves. — Native of the Le- vant. " Cultivated by Miller, and recently reftorcd to our gardens by feeds obtained from Siberia, by Mr. Loddiges. The root is perennial. Several declmibent branches from the root bear leaves divided into many linear fegments ; but the foliage of the ereft panicled flowering Jlem is doubly three-cleft below, fimply above. Itiflorefcence terminal, race- mofe, compound, with fmall bradeaceous leaves. Floivers numerous, almoft as Large as thofe of T. fruticans hereafter defcribed, of a light purplifli-blue. All the herbage, and even the corolla, is hairy or downy. We have already men- tioned, under our firft fpecies, that the citation of Rivinus by Willdenow is an error. T. Botrys. Cut-leaved Annual Germander. Linn. Sp. PI. 786. Willd. n. 5. Ait. n. 3. Mill. Ic. t. 264. f. I. (Iva mofchata, folio multifido ; Riv. Monop. t. 14. Cha- mjepitys fccmina ; Ger. Em. 525.) — Leaves many-cleft. Flowers axillary, oppofite, in pairs, turned oneway. Calyx tubular, inflated and gibbous at the bafe. — Native of Ger- many, Switzerland, France and Italy, in dry fields. Root annual, fibrous. Herb hairy, branched from the bottom, ereft. Leaves deeply pinnatifid, fomewhat three-lobed. Flowers ftalked, crimfon, four together, making a fort of half whorl. The calyx becomes greatly enlarged after flowering, tubular, reni;u-kably inflated below, and termi- nating in five triangular, awned, converging teeth. T. trtfidum. Trifid-leaved Germander. Retz. Obf. fafc. 1. 21. Willd. n. 7. Ait. n. 5. (T. capenfe; Thunb. Prodr. 95.) — Leaves hoary, in three deep linear iegments. Stalks axillary, three-flowered. Calyx hoary, without awns. — Gathered at the Cape of Good Hope, by Thun- berg and Maffon. The latter fent feeds to Kew in 1 791. The plar.t is fhrubby, flowering moft part of the fummer, and kept in the greenhoufe in winter. Its afpeft ia not un- like Winter Savory, but more hoary. The fegments of the 7 leaves TEUCRIUM. hiives are an inch long, revohite, entire. Floiuer-Jtalks half the length of the leaves. Segments of the calyx elongated, lanceolate, revohite, fingle-ribbed, bluntly pointed, not awned. Corolla purpllfh. Seeds with a net-work of wrinkles over their furface. T. Pfcjdo-chamtsp'ilys. Raceniofe Slender-leaved Cornian- der. Linn. Sp. PI. 787. Willd. n. R ; excluding the fy- nonym of Cliifius. (Chamxpitys alia; Camer. Epit. 680. Chamaepityos fpurix alterius altera icon ; Dod. Pempt. 47.) — Leaves deeply once or twice three-cleft, linear, acute, re- volute, hairy. Clufter terminal, fimple. Brafteas three- cleft. Calyx lioary, awned. — Native of Spain, Barbary, and the fouth of France. The Jlem is fhrubby, divided from the bottom into many afcending, leafy, fquare, moftly hairy branches. Leaves in very narrow, fomewhat awned, fegments, more or lefs hairy. Flowrrs much like thofe of T. oneniale, but forming a fimple terminal clvjler at the top of each branch, with deeply three -cleft linear braHeas, ufually as long as the Jlo'wer-Jlalks. Lip of the corolla externally hairy. The Pfeudochamo'filys of CM. HH\. v. 2. iS^. Lob. Ic. 385. f. I. Chamsepitys fpuria altera; Ger. Em. 526; the left-hand figure in Dod. Pempt. 47 ; all from the fame wooden block ; -appears to us a different fpecies from the above-defcribed, with which ve are unacquainted. There can be no doubt that the T. maur'itauum, Linn. Sp. PI. 787, en- tirely adopted from Shaw's rude figure, n. 575 of his Phyt. Afric. Specimen, is exaftly the fame with the real Pfeudo- chamxp'itys of Linnieus, which we have from Spain and Bar- bary, and which the cut of Camerarius, as well as the right- hand one of DodoiiiEUS, clearly reprefents. All the foregoing fpecies, with a fe^^■ more wliich may be found in Linn^us and Willdenow, apparently conftitute a feftion of the genus before us, w-hofe deeply-dividedyb/ia^ gives them a peculiar and Itriking charafter. Their injlorefcence neverthelcfs differs confiderably, and on a more careful ex- amination it will be found, that the racemofe blue-flowered ones are moft naturally akin to the T. fruUcans, notwith- ftanding its undivided entire leaves ; wliile the others are more related to fome cut-leaved red-flowered fpecies, with which we fliall meet hereafter ; infomuch that no natural fiibdivifion of this genus could be founded on the above charafter. T. frutkaiis. Blue Tree Germander. Lii.n. Sp. PI. 787. Willd. n. 9. Ait. n. 6. Sm. Fl. Grcec. Sibth. t. 527, un- publifhed. (T. latifolium; Linn. Sp. PI. 788. Curt. Mag. t. 245. T. fruticans bocticum ; Cluf. Hilt. v. I. 348. Dill. Elth. 379. t. 284. T. boeticum ; Ger. Em. 659.) — Leaves ovato-ianceolate, entire ; fnow-white and cottony beneath. Flowers axillai-y, folitary. Segments of tlie calyx ovate, cottony at the back Native of the foutli of Europe and north of Africa. A hardy and common greenhoufe plant ill England, fometimes bearing our milder winters in the open air, efpecially near the fea. The Jlem is fhrubby, 'ouihy, three or four feet high, with ftraight, divaricated branches, clothed, like the backs of the leaves and calyx, as well as all the_y?<7//'j, with peculiarly white, foft, denfe down. The leaves vary in fize and breadth, as may be feen in the plate of Dillenius, whofe fig. 368. milled Linnseus to make a fpecies, by the name of latifoliam, v/hich is but a trifling variety. Tlie upper furface of the leaves, and infide of the calyx, are dark-green, ufually quite fmooth. Flowers large and handfome, of a fine blue, coming out at all times of the year : the middle fegment of their lower lip fome- times deeply cloven. T. brev'tfolium. Short Hyffop-leaved Germander. Schreb. Vertic.Unilab. 27. Willd. n. 10. Sm. Fl. Graec. Sibth. t. 528, unpubhflied. ( Rofmarinum floechadis facie ; Alpin. Exot. 103. t. 102. Polio retto di Candia ; Ton. Bald. 156.) — Leaves lanceolate, revohite, entire, obtufe, honry. Flowers folitary. Calyx without awns. — Native of rocks in Crete, near the tca-fliore. The_/??m is fhrubby, with copious Spread- ing, fquare, leafy branches. Leaves about an inch long, of a hoary green on both fides, veiny. Flowers on flender, folitarj-, fimple ftalks, from the bofoms of the upper leaves. Corolla blufh-colonred, with purple veins. Segments of the calyx revolute and blunt. Schreber and Willdenow cite, under this fpecies, T. frutcfccns, ftoechadis arabicje folio et facie ; Tourn. Cor. 14. Rivin. Monop. t. 20 ; which is correft as to Tournefort, but no fuch thing occurs in Ri- vinus. If we had not confulted, in fir Jofcph Banks's library, the moft perfefl copy of his work known to cxill, we fhould not fpeak fo decidedly on this head. T. creticum. Rofemary -leaved Germander. Linn. Sp. PI. 788. Willd. n. 1 1. Sm. Fl. Gnec. Sibth. t. 529, un- publifhed. (T. hyffopifolium ; Schreb. Vertic. Unilab. 28.) — Leaves linear-lanceolate, revolute, entire, obtufe ; white and cottony beneath. Flowers often two or three together. Calyx cottony, fpinous Native of Crete, Cyprus, and Egypt. A taller, hiTger Jhrub than tlw laft, fome of whofe fynonyms were confounded with it by Linnasus. Its habit and foliage much reiemble Rofemary. Thejlowers are light purple, or pink, and form long leafy chijlers, at the ends of the branches, being cither folitary, or two or three together, on fliort downy Jlalis, from the bofonis of the upper leaves. The ca/yx is cottony without ; green within ; and has fhort fpinous points. T. Marimi. Marum Germander, or Cat-thyme. Linn. Sp.Pl. 788. Willd. n. 12. Ait. n. 7. (Pfeudo-Marlim; Rivin. Monop. Irr. t. 13, not t. 40, which is Thymus Maf- tichina. Marum Cortuii ; Bauh. Hift. v. 3. 242.) — Leaves ovate, acute, entire, ftalked, cottony beneath. Flowers racemofe, in pairs, turned one way. Calyx woolly. — Na- tive of Spain, and the ifles of Hyeres. Frequent in green- houfes, where it is very hardy, being cultivated for the fake of its pecuharly pungent fcent, which powerfully in- duces fneezing, and which renders it not lefs grateful to cats than Valerian. The Jlem is bufliy, of humble growth, with round hoary branches. Leaves a quarter of an inch long, of a hoary green on the upper fide. Flowers crimfon. T.quadratulum. Little Square -leaved Germander. Schreb. Vertic. Unilab. 36. Willd. n. 13. Sm. Fl. Grxc. Sibth. t. 530, unpublifhed. (T. ramofifllmum ; Desfont. Atlant. V. 2. 4. t. I 18.) — Leaves obovate -rhomboid, deeply tooth- ed ; cottony beneath. Flowers axillary, folitary, deflexed. Calyx woolly. — Native of fiffures of rocks, in Spahi, Bar- bary, and Crete. A fmall, decumbent, brandling Jljrub, whofe leaves are not half an inch long ; green above ; white beneath. Flowers pink, their calyx bent down, fo as to make a right angle with ksjoojlali, and then recurved. Seg- ments of the upper lip of the corolla advanced towards thofe of the lower in a remarkable degree. Style rcflexed. T. Laxmanni, Laxmann's Germander. Linn. Syft. Veg. ed. 13. 439. Willd. n. 16. Ait. n. 10. Marfch. von Biebertt. Taur. v. 2. 35. " Waldil. and Kitaib. Hung. v. I. 71. t. 69." — Leaves elliptic-oblong, villous, ribbed, nearly entire. Flowers axillary, folitary, oppofite, turned one way. — Native of Siberia, Hungary, &c. We notice this fpecies here merely to exprefs our concurrence with the opinion of the able author of the Flora Taurico- Caucafica above cited, that it certainly belongs to Ajuga, as well as the 7'. falleijolium, Linn. Mant. 80, already referred thither by Schreber and Willdenow. The two fpecies are very nearly akin, and anfwer in charader and habit entirely to yljuga, and not to Teucrium. T. ylrduiiii. TEUCRIUM. T. Ardu'wl Arduino's Germander. Linn. Mant. 8i. Willd. n. zo. Sm. Fl. Grace. Sibth. t. 531, unpubliHied. (T. foliis ovato-crenatis, fubliirfutis, petiolatis, caulibus fpica flavefceiite pikjfa terminitis ; Arduin. Spec. I. 12. t. 3. Scutellaria crctica ; Linn. Sp. PI. 836. Willd. Sp. PI. V. 3. 176. Ait. Hort. Kew. v. 3. 429. Caffida cretica fruticofa, catariac folio, flore albo ; Tourn. Cor. II.) — Leaves ovate, ferrated, hairy. Clufters denfely innbricztcd, cylindrical, with linear brafteas, longer than the flowers. Upper ffgment of the calyx dilated, hcart-fliapcd ; two loweft fetaccous Native of Crete, and of the fhady woods of the Bithynian Olympus. It appears to have been culti- vated by Miller in 1729. Although Linnaeus, in referring this plant, after Tournefort, to Scutellaria, perceived it to be a Tsucrium, neither he nor any one elfe, till lately, fuf- peAed it to be defcribed twice over in his works. This we difcovereJ by a comparifon of original fpecimens. Thejlem is herbaceous, not (hrubby, fquare, crofs-branched, leafy, rough witli fpreading hairs. Leaves ftalked, not unlike thofe of Balm in fize, form, and colour. Clufters from one to four inches long, near an inch in diameter, iblitary at the ends of the branches, ereft, of innumerable crowded white ^owfrj-. The calyx is hairy, fnddenly bent downwards at its taper bafe, then horizontal, its border very unequally five -cleft ; the upper fegment broad, as in Scutellaria, reflexed at the fides, tipped with a briftle ; two next (hort, triangular ; two loweft long, narrow, with pungent points. T. canadenje. Nettle-leaved Hoary Germander. Linn. Sp. PI. 7S9. Willd. n. 21. Ait. n. 13. Purfh n. i. (Chama;dryscanadenfis, urticx folio, fubtils incano ; Tourn. Inft. 205.) — Leaves ovato-lanceolate, ftalked, fnarply fer- rated, downy on both fides ; hoary beneath. Clufter ter- minal, denfe, fomewhat whorled. Brafteas ovate, (horter than the flowers. Segments of the calyx nearly equal In low grounds, on the borders of ponds and lakes, from Ca- nada to New York, perennial, flowering in July and Au- guft. The habit of the leaves and injlorefcencc is like that of fome fpiked Veronica. At the infertion of each pair of footftalks, the Jlcm is furrounded with a ring of prominent hairs. The calyx is bell-lhaped, with five broad, nearly equal, fegments. Corolla purple. T. lArginicum. Viginian Germander. Linn. Sp. PI. 789. Willd. n. 22. Ait. n. 14. Purfh n. 2. " Schkuhr Handb. t. 160.'' (T. virginianum meliflbphyllon, floribus caeruleis ; Pluk. Ahnag. 363. Phyt. t. 318. f. 1 ; with a very faulty reprefentation of the corolla. ) — Leaves ovate-oblong, fer- rated, downy ; the upper ones feffile. Spikes crowded, whorled. Brafteas the length of the calyx In low grounds and bogs, from New York to Carolina, perennial, flowering from June to Auguft. It very much refembles the laft. Purjh. — Miller is faid to have cultivated both thefe North American fpecies in 1768. We have feen only the former. T. abutiloides. Mulberry-leaved Germander. L'Herit. Stirp. V. I. 84. Willd. n. 27. Ait. n. 17. Jacq. Hort. Schoenbr. v. 3. 58. t. 358.— Leaves heart-fhaped, acute, crcnate, downy. Clufters axillary, not longer than the foot- ftalks— Difcovered by Mr. Mafl'on in Madeira, from whence It was brought to Kew, in 1777. It flowers in the green- houfe in April and May, and is confpicuous for the large fize of Its ha-ves, four or five inches long, on denfely downy footftalks, half that length. The ftowers are no lefs remark- able for their golden hue, and their fituation in denfe, foli- tary, lateral, ftalked c/a/^^rj, which rarely equal the footftalks in length. - T. 5'per and hiuer. The upp'r has two notable dialefts ; viz. i. The Scan- dian, Danifh, or perhaps Gothic ; to which belong the lan- guages fpoken in Denmark, Norway, Sweden, and Iceland. 2. The Saxon, to which belong the feveral languages of the Englifh, Scots, Frifian, and thofe on the north of the Elbe. To the loiuer belong the Low Dutch, Flemifh, &c. fpoken through the Netherlands, &c. The learned Mr. Whitaker has lately, in his Hiftory of Manchefter, controverted the opinion of thofe who af- firm the Englilh language to be genuine and unmixed Ten- tonic, and afferted it to be of Celtic origin. Mr. Drake, in his Effay on the Origin of the Englilh Language, Ar- chiol. vol. 5. has endeavoured to fupport the former opi- nion, by comparing part of Ulphila's Gothic verfion of the gofpel of St. John, executed above 1400 years ago, with the fame in our prefent tranflation, and evincing the ftriking aifinity between the two languages ; notwithftanding the dif- ferent mediums through which they have defcended, and the many ages that have elapfed fince they have been feparated. Every circumftance, he obferves, that conftitutes the true genius of a language, is vifibly derived to the Englilli from the Goths and Saxons. The article?, flexure of the genitive cafe, prepofitions and auxiliary verbs, are all abfolutely Teu- tonic. The Englifh, he fays, is clearly the natural defcend- i-nt of the Gothic or Teutonic ; and he challenges the deepeft enquirer into the Celtic to produce fo decifive a proof of ■I" 1-: u any affinity of that tougue with our;;. The Britilh, he adds, has little or no refemblance to the Englifli. Many of their terms may have gained adniinion among us, as, from the vicinity and long intercourle we have had with that people, may ncccflarily be imagined, but their idioms and genius arc as radically and eflcntially diflfcrcnt as any two languages can poflibly be. Teutonic; Order, a military religious order of knights, eftabliflicd towards the clofe of the twi-lfth century ; and thus called, becaufe it confided principally of Germans, or Teutones. The origin, &c. of this order were thus: the Chrif- tians, under Guy of I^ufignan, laying fiege to Acre, or Aeon, a city of Syria, on the borders of the Holy Land ; at which fiege were prefent, Richard king of England, Phihp Auguftus of France, &c. fome Germans of Bre- men and Lub^c, touched with compafTion for the fick and wounded of the army, who wanted common iiecef- faries, fet on foot a kind of hofpital under a tent, which they made of a (hip's fail ; and here betook themfelves to a charitable attendance on them. This ftarted a thought (about the year 1 190) of efta- blifhing a third military order, in imitation of the Tem- plars, and the Hofpitaltrs. The defign was approved by the patriarch of Jerufalcm, the archbilhops and bifliops of the neighbouring places, the king of Jerufalem, the mafters of the Temple and the Hofpital, and the German lords and prelates then in the Holy Land ; and, by common confent, Frederic duke of Suabia, who was then at their head, fent ambafladors to his brother Henry, king of the Romans, to folicit the pope to confirm the new order. Calixtus III. who then governed the church, granted it by a bull of the 23d of February, 1192, and the new order was called " The Order of Teutonic Knights of the Houfe of St. Mary of Jerufalem." The habit of this order was a white mantle, with a black crofs. The pope granted them all the privileges of the Tem- plars, and the Hofpitalers of St. John ; excepting that they were to be fubjcft to the patriarchs, ;md other pre- lates ; and that they fhould pay tithe of what they pofTefied. The firft mafter of the Teutonic order, Henry Walpot, clefted during the time of the fiege of Acre, after the taking of that city, purchafed a garden, in which he built a church, and an hofpital, which was the firft houfe of the Teutonic order. Such is the account given by Peter of Duift)Ourg, aprieft of this order. Jaques de Vitty differs a little from t^iis account ; and relates, that the Teutonic order was eftabhfhcd at Jerufalem before the city of Acre was befieged. The order made no great progrefs under the three firft grand-mafters ; but under the fourth, Herman de Salza, it became very powerful ; infomuch that Conradc, duke of Mazovia and Cujavia, about the year 12^0, fent an' embaffy to him, to folicit his friendfhip and affiftance, offering him and his order the provinces of Cuhne and Livonia, with all the lands they could recover from the idolatrous Pruffians, who haraffed him exceedingly with their continual incurfions, and againft whom he intended this new militia ; his own knights of the order of Chrift, or of Dobrin, inftituted for the like purpofe, being found too weak. De Salza accepted the donation, and Gregory IX. con- firmed it ; and, to aid the knights m reducing the Pruf- 3 I 2 fians, T E U ilans, Innocent IV. publilhcd a croifado. With this help, in a year's time, tiiey fubdutd the provinces of Warmia, Natangia, and Barthia ; the inh ibitants of which renounced the worfhip of idols ; and, in tlie courfe of fifty years more, they reduced all Pruffia, Livonia, Samo- gitia, and Pomerania, &c. In 1204, duke Albert had founded the order of Sword- bearers, Port-daives, which now becan\e united to the Teutonic kniglits, and the union was approved by pope Gregory JX. The order, thus mafters of all PrufTia, built the cities of Elbing, Maricnburg, Thorn, Dantzick, Koningfberg, and fome others: the emperor Frederic II. permitted them to add to the arms of their order, the imperial eagle ; and St. Louis, in 1 250, allowed them to quarter the fleur-de-lis. After the city of Acre had been recovered by the infi- dels, the grand-mafter of the Teutonic order removed his feat from that city to Marienburg. As the order grew in power, the knights took more ftate on them ; and at length, inflead of friars, brothers, as at firft, would be called lorjj. And though the grand-mafter Conrade Zolncra, of Rotenilcine, oppofed this innovation, his fuccelTor Conrade Wallerod not only approved it, but even procured himft-lf to be treated with honours only rendered to the greateft princes. Divifions being got into the order, the kings of Poland made their advantage of them : the Pruffians revolted to them : and after feveral wars between the knights and the Poles, the former yielded to king Cafimir the Upper Pruf- fia, and did homage to him for the Lower. At the time of the Reformation, Albert, marquis of Brandenburg, then grand-mafter, becoming a Lutheran, renounced the dignity of grand-mafter, difiblved the com- manderics, and drove the knights out of Pruffia. Moft of the knights followed his example, and embraced the reformation : the reft transferred the feat of their order to Margentheim, or Mariendahl, in Franconia, which they ftill retain. They there elcfted Walter of Cromberg their grand- mafter, formed a procefs againft Albert, and the emperor put him to the ban of the empire. The order, how- ever, could never recover their domains ; and are now little more than the fhadow of what they formerly were, having only three or four commanderies, icarcely fufficient for the ordinary fubfiftence of the grand-mafter and his knights. The officers of the Teutonic order, when in its fplendor, were the grand-mafter, who refided at Mai-ienburg : un- der him were the grand-commander ; the grand-marftial, who had his refidence at Koningftjerg ; the grand-hofpi- taler, who refided at Elbing ; the draper, who took care to furnifh the habits ; the treafurer, who lived at the court of tlie grand-mafter ; and feveral commanders, as thofe of Thorne, Cuhne, Brandenburg, Koninglberg, Elbing, &c. They had alfo their commanders of particular caftles and fortreffijs; advocates, provcditors, intendants of mills, provifions. Sec. Waiftl'hus, in his Annals, fays they had twenty-eight commanders of cities, forty-fix of caftles, eighty-one hofpitalers, thirty-five maftors of convents, forty ftcw- ards, thirty-feven proveditors, ninety-three mafters of mills, feven hundred brothers or knights to take the field, one hundred and fixty-two brothers of the choir, or pricfts, and fix thoufand two hundred fervitors or domeftics. TEW TEUTSCH Leipsh, in Geography, a town of Hungary 5 miles E. of Rofenberg. Teutsch Pron, a town of Hungary; 10 miles N.W. of Kremnitz. TEUTSCHDORF, a town of Hungary; 5 miles N.W. of Cafchau. TEUTSDORF, a town of Pruffia, in the province of Oberland ; 10 miles E.N.E. of Holland. TEUVRENT, a town of Africa ; 145 miles E.N.E. of Fez. TEUW, a fmall ifland in the Eaft Indian fea. S.lat. 7° 11'. E. long. 129° 20'. TEUXUNTA, in Ancient Geography, a town of Sicily, which had been built by Micythus, king of Rhegium and Zancle, according to Diodorus Siculus. TEWANTAPAGUE, in Gw^raz-^v, a town of Mexico, in the province of Guaxaca ; 135 miles E.S.E. of Guaxaca. TEWKESBURY, anciently Teodechejberte, a large and refpcftable borough and market-town, in the lower divifion of the hundred of the fame name, in Gloucefter- ffiire, England, is fituated in the vale of Eveiham, on the eaftern banks of the Avon, near its confluence with the Severn, at the diftance of 8 miles N.N.E. from Gloucefter, and 104 miles W.N.W. from London. This town was rendered famous in hiftorv, from a battle fought near it, between the Yorkifts and Lancaftrians, wherein Ed- ward IV. gave a total overthrow to Henry VI. Three thoufand of the Lancaftrians were reported to have been ilain in the field, and queen Margaret, with many others, was taken prifoner. The feveral circumftances which oc- curred during the engagement, and the events fubfequent to the victory, are very fully related in the hiftories of England. Tewkefbury was again the fcene of another aftion in the civil wars of Charles I. It was at different periods in pofleffion of both parties ; and the final capture of it by the parliamentary forces was of great confoquence as a frontier town, fecuring that fide of the county, and com- manding great part of Worcefterftiire. Tewkeft)ury was firft incorporated by charter in the 1 7th of Elizabeth, under the title of " baihffs, burgoftes, and com- munity of the borough of Tewkcftiury." Other charters were granted by James I. and James II. ; the latter, in the fecond year of his reign, re-incorpoi-ated them by the name of " mayor, aldermen, and common council ;" but this charter was not afted upon : and the government of the town, as a corporation, was dormant till 13 William III. when the prefent charter was obtained, under which the town is governed by twenty -four principal burgelTes, vs'ho, with twenty-four affiftants, aft independent of the magif- trates of the county. From thefe are annually elefted two bailiffs and four juftices, who, with the recorder, form the magiftracy of the corporation. The privilege of fending members to parliament was firft obtained 7 James I. The right of elefticn is in the freemen and freeholders within the borough : the latter of whom have a vote generally for the county. The number of voters amount to about 500, and the bailiff's are the returning officers. The principal manufafture for the employment of the inhabitants is ftocking-frame work knitting, particularly cotton. This fupplies work for the Houfe of Induftry, which is a modern building, well adapted for the purpofe of reniler- ing the poor cleanly, moral, and induftrious. The mar- kets, which were eftabliftied as early as the Conqueft, are held on Wednefday and Saturday : and here ai-e feven annual fairs. The town-hall, which is a handfome edifice, was erefted by fir William Codrington in 1788, at an expence of 1200/. The ground-floor is appropriated for holding TEW TEX holding tlie quarter -feflions ; the upper floor for a banquetting room, and for the meeting of the corporation. Among the charitable eftabliftimcnts are a free grammar-fchool, a eharity-fcliool, and feveral alms-houfes. The Anabaptills, Quakers, Independents, and Metliodifts, have each a meet- ing-houfe in the town. The population, according to the returns of the year 1811, amounted to 4820; the number of houfes being 1003 : the latter are chiefly of brick, and principally ranged in three fpacious ftreets. Since the year 1786, when an aft was pafTed for paving and lighting the town, many improvements have been made ; and the buildings have affumed an air of refpcftabiHty. The Ahhey. — A monaftcry was lirft ereftc-d here, and endowed by two brothers, Oddo and Doddo, dukes of Mercia, A.D. 715, to the honour of the lilefTed Virgin, which having undergone many calamities during the civil and Danifli wars, about 980 became a priory, fubjeft to Cranbourn in Dorfotlhire : but Robert Fitzhamon, a noble Norman, who came to England with the Conqueror, enlarged the buildings and increafed the poflefiions ot Tewkefbury fo much, that the monks of Cranbourn chofe, about 1102, to remove to this place, leaving only a prior and two monks behind, and made Cran- bourn in future fubjeft to the abbey of Tewkefbury. From this time it became a great eftablifhment of Benedic- tine monks ; and at the fupprelTion, the annual revenues amounted to 1598/. \s. 7,d., exclufive of 136/. 8j. \d. granted by ihc convent for fees and annuities : its plate alfo was very valuable, the facrifty alone containing 142 1 ounces. After the diflblution, the deftriiftion of the nionaftic buildings was rapid and complete, through the inefFeftual oppoiition of the monks to the vifitors ap- pomted by the king, who, in revenge, deftroyed the Lady chapel, cloifters, chapter-houfe, and other appen- dages by fire. The remains of the buildings were after- wards purchafed by the inhabitants : and the Abbey Church was made parochial. This magnificent ftrufture difplays an interefting example of early Norman architec- ture, combined with fpecimens of later ftyles, and is in other refpefts well calculated to arreft the attention of the antiquary. It is built in the cathedral form, and confifts of a nave, choir, tranfept, and central tower, with the addition of feveral chapels, ranged roimd the aifle of the choir. The nave and choir are feparated from the aifles by eighteen mailive columns, fuftaining the roof, and four fubftantial piers which fupport the tower. At the weft end is a large window with a pointed arch, which appears to have been introduced within a femicircular arch in 1656. There were cloifters on the fouth fide of the nave, where fome fragments yet remain ; and appear to have been highly ornamented in a fimilar ftyle to thofe at Gloucefter. The tower, according to the Abbey chro- nicles, was once terminated by a wooden Ipire, which fell down on Eafter-day, 1559. The moft remarkable fpecimens of the architefture are three tiers of arcades in the upper part ; the arches of the middle tier iiave interefting mouldings. The length of the churcli is 300 fgct ; of the tramfept 1 20 ; the breadth of the choir and fide-aifles is 70 feet; of the weft front 100; the height from the area to the roof is 120 feet ; the height of the tower 152 feet. The monuments, which are numerous, have attracted the attention of various antiquaries, particularly Mr. Gough and Mr. Lvfons ; the latter of whom has taken great pains in afiigning the different tombs to the real perfons they were intended to commemorate : many miftakes, in this refpeft, having been committed on traditional authority by former writers. Near the weft end of the church is. the Abbey Gate-houfe, which appears of the age of the fifteenth century : it is embattled and ornamented with grotefque figures, projefling from a cornice ; beneath which is a canopied niche between two fquare windows Dyde's Hiftory, &c. of Tewkefbury, 8vo. 1798. Rudge's Hiflory of Gloncefterfliire, vol. i. 1 803. Beauties of England and Wales, vol. v. Gloucefterlhire j by J. Britton and E. W. Brayley. Tewkesbuky, called Wamejit, or Pawtuchl, by the In- dians, a townfhip of MafTachufetts, in the county of Middle- fex, containing 943 inliabitants ; 24 miles N. of Bofton. TEXALI, in j^nciciit Geography, the inhabitants of the fua-coafts of Aberdeenfhire ; who had a town, called De- vana, at the mouth of the river Deva (Dee), where oltf Aberdeen now ftands. TEXAS, in Geography, a province of New Spain, which properly forms part of Louifiana. This province is claimed by Spain as part of the internal provinces, and included in the vaft intendancy of San Louis Potofi : k is bounded E. by the ftate of Louifiana, S. by the gulf of Mexico, W. by an imaginary limit, and N. by Red river, and contains an area exceeding 100,000 fquare miles. The capital of this province is the garrifon of San Antonio de Bejar, ridicu- loufly called the New Philippines. It was founded in 1731, confifting of a captain, a lieutenant, and one company of foldiers. The ftation of Cenis in this province, is now a mere Indian village, with the ruins of a fo-rt built by the French. That called Natchitoches, from an Indian tribe, friends of the French and enemies of the Spaniards, was a fmall fort, built on an ifland of the Red river by fome French veterans. But the ftation of Adayes, or Adaes, is regjarded by the Spanifh writers as the extreme fortrefs in this quarter : it is feated in a fertile counti-}-, at the diftance of two leagues from a lake of the fame name, which abounds in fiih, and which in fome parts is five leagues in di.imeter, and probably ten in circumference, with a gulf which may be navigated by large vefTels. In the middle of the lake is a hill, or rock, of a pyramidal form, more than 100 yards in circumference, the ftone of which refembles cryflal in its rcfleftion of the folar rays, and it is the highelt in the diftrift. The vicinity abounds in wild cattle, bears and beavers ; and the foil is fertile in maize and other grain. Pinkerton. TEXEIRA, Joseph (Peter), in Biography, a Portu- tuguefe hiftorian, was born in 1543, entered among the Do- minicans, and became prior of the monaftcry at Santarem in 1578. When Phihp II. of Spain tuok pofteffion of Por- tugal, Texeira attached himfelf to Don Antonio, who had been proclaimed king by the Porluguefe, and accompanied him into France. In 1582 he was taken prifoner by the .Spaniards, but made his efcape from Lifbon. He became confeifor to Don Antonio, and, in proccfs of time, preacher and almoner to the French king Henry III. He afterwards attached himfelf to Henry IV., and in 1596 affifted at the abjuration of Calvinifm by the princefs of Conde. He was fent on oiie milTion to England, and favourably received by king James. He died at Paris in 1604, as fome fay ; but according to another account, in 1620. In 1582, Texeira printed his " Compendium de Portu- galhae ortu Regni initiis, &c." This work was anfwered by order of the king of Spain ; and Texeira replied, in 1592, by a " Confutatio, &c." wrhich profelfed to refute the hereditary right of Pliilip to the crown of Portugal, and to v-indicate that of Don Antonio ; — probably the fame work that is entitled " De Elcttionis Jure quod competit Viris Portugallcnfibus in-augurandis fuis Regibus," Lyons, 1589. As T E X A? a genealogift, under which char.-iacr he was diftinguiflieJ, he publiflied in l 590, " Exegefis Genealogica Arboris Gen- tilitiit Henrici IV., Gullorum Regis," enlarged in 1598, with the addition of iIk- princefs ot Condc's abjuration. In token of tlie indignation he felt at the feizure of his country by Philip, he affirmed, as it is faid, in one of his fermons, that " we were bound to love all men, of whatever religion, fed or nation, even if they were Caftilians." Bayle. Moreri. „ 1 r tjt 1 TEXEL, or Tessel, in Geography, an ifland ot Hol- land, about 1 1 miles in length, and fix in its grcatell breadth ; fituated at the mouth of the Zuyder See, with a capacious and good harbour, and a fort, which commands the en- trance ; befides a town of the fame name, it contains iix vil- lages : the land is fertile in pafture, and the whole well fe- cured with dikes of prodigious ftrength and height. Near this iflaiid was the celebrated fea-fight, between the fleet of Holland, under admiral Martin Harpertz Tromp, and that of England, under admiral Blake, in the year 1653, in which Tromp was killed. In the year 1673 a battle was fought between the fleet of Holland and the united fleets of Eng- land and France, in which the viftory was doubtful. N. lat. 53°5'. E. long. 4° 40'. TEXEUIT, or Tevent, a town of Morocco; 100 miles W.N.W. of Morocco. TEXT, a relative term, contradiftinguilhed to glofs or commentary ; and fignifying an original difcourfe, exclufive of any note or interpretation. Infinite pains have been taken by the critics, to reftore, reconcile, fettle, explain, &c. the text of the bible, and that of the claffics. See Bible. Mr. Whifton accounts for all thofc mifundcrftandings between the Old and New Teftament, particularly as to the prophecies in the Old, cited as fulfilled in the New, from the corruption of the text of the Old Teftament ; and to obviate objeftions made againft; Chriftianity on that head, has pub- lilhed an " Effay towards reftoring the true Text of the Old Teftament." See Prophecy. This reftoration he attempts to effeft from the Samaritan Pentateuch, the Roman Pfalter, the Apoftolical Conftitu- tions, &c. It fufficiently appears from the learned and acceptable la- bours of the late Dr. Kennicott, in collating the Hebrew manufcripts of the Old Teftament, that the alterations in- troduced into the text, &c. are moftly of a trivial na- ture, and by no means affedl the authority of the facred writings. Text is particularly ufed for a certain paffage of fcrip- ture chofen by a preacher, to be the fubjeft of his fermon. A coileftion of texts appropriate to different fubjefts, and judicioufly arranged, has been publifhed by Dr. En- field for the ufe of preachers in the compofition of their dif- courfes, and alfo of bibhcal readers and ftudents. Anciently, the lawyers began all their pleadings with like texts of fcripture. A text-book, in feveral univerfities, is a claflic author written very wide, by the ftudents, to give room for an inter- pretation diftated by the mafter or regent, to be inferted in the interlines. In this fenfe, the French fay, proverbially, Glqffe cPOr- hans plus obfcure que !e texte. The Spaniards gave the name text to a kind of little poem, or fet of verfes placed at the head of a glofs, and making the fubjeft of it : each verfe being explained, one after another, in the courfe of the glofs. Text, in Ancient Law Authors, is appropriated to the T F U book of the Four Gofpcls, by way of eminence. Thefe were written in gold letters, and carefully preferved in the churches. " Codex aurato confeptus grammate fcriptus. Auftus evangelicum conTervat corpore textum." TEXTUARIES, TEXTUARri, a name given to the feft. of the Caraitcs, among the Jews. Hillel Ihone among the traditionaries, and Schammai among the textuaries. The civil and canon lawyers fometimes alfo call a book containing the bare text, without any glofs or commentary, a textuary, textuarium. TEXTURE, Textura, formed of texo, / weave, prs- perly denotes the arrangement and cohefion of feveral flen- der bodies or threads interwoven or entangled among each other : as in the webs of fpiders, or in cloths, ftuffs, &c. Texture is alfo ufed in fpeaking of any union or cohe- fion of the conftituent particles of a concrete body ; whether by weaving, hooking, knitting, tying, chaining, indenting, intruding, comprefTiiig, attrafting, or any other way. In this fenfe, we lay a clofe, compaft texture,; a lax, porous texture ; a regular or irregular texture, &c. A great deal depends on the texture of the component parts of a body : hence moft of its particular properties, its fpecific gravity, colour, &c. TEXTUS RoFFENSio, ie an ancient manufcript, con- taining the rights, cuftoms, tenures, &c. of the church of Rochefter, granted by the laws of Ethelbert, Hhollhere, Eadred, and Withred, kings of Kent, coUefted by Er- nulf, the venerable biftiop of Rochefter, about the year 1 100. TEYA, in Geography, a river of Autlria, which rifes about three miles N. from Germs, pafles through a part of Moravia, and runs into the Marfch, 1 1 miles N.E. of Zifterfdorf. TEYN, a town of Bohemia, in the circle of Boleflau ; 12 miles W.N.W. of Jung Buntzel. TE-YUEN, a town of Afia, in the kingdom of Corca ; 93 miles N.E. of King-ki-tao. TEZA, a town of Africa, in the kingdom of Fez, with a caftle. It was once a populous city, but is now much decayed, yet is ftill the refidence of a governor and a gar- rifon ; 20 leagues N.N.E. of Fez. TEZCUCO, or Tetzcoco, a lake of Spanilh Ame- rica, in the province of Mexico. The conjuntl lakes of Tezcuco and Chalco are found to be about 30 Briiifh miles in length, and the former is about 15 miles in breadth ; but as the latter is partly drained, fo as to be at the diftance of a league from the city, it is probably about twelve miles in breadth. This lake is celebrated in hiftory, as originally containing the city of Mexico, and alfo as remarkable for the qualities of the water, partly frefli, and partly falinc. The Chalco, or frefli-water lake in thefouth, appears to flow by a narrow channel into the fait lake of Tezcuco. See Mexico, fubftituting for Tezeuco, Tez,cuco. TEZELA, a town of Africa, in the kingdom of Al- giers ; 5 leagues S.W. of Gran. TEZERGBE, a town of Africa, in the kingdom of Fez ; 100 miles E.S.E. of Teza. TEZOUT, or Tessot, a town of Africa, in the king- dom of Fez ; 35 miles S. of Melilla. TFENI, a town of Egypt, on the Nile ; 10 miles S.E. of Rofetta. TFUOI, in the Chlnefe Manufaflory of Porcelain, a word ufed to exprcfs a particular fort of varnilh for that ware, 4 with T H A with violet-colour and gold. The ufual mctiiod of doing this at iirft, was by mixing gold with the common varnifti, breaking the leaves very fmall, and- then adding the com- mon blue and the powder of calcined agate of a coarfe kind, found in great plenty on the (horcs of their rivers. But they have lince found that the brown varnifh called tfck'tn fucceeds much better, for when the blue is mixed with this, its brown colour is loR, and the gold lies on much better than it would any other way. They had once a method of a varied varnifli, which was very beautiful, but is much neglefted now ; this was the giving a velfel the brown varnidi on the outfide with a large portion of gold, and the common white varnifh within. They alfo varied tiie degree of colour on the outfide, by laying on more or lefs of the varnifli ; and gave this way a variety, even in the fame colour. Obferv. fur les CoCltumes de I'Afie, p. 308. TGIDT, in Geography, a town of Arabia, in the pro- vince of Oman ; 48 miles N. of Fartach. THABBA, in Ancient Geography, a town of Arabia pelix, fituated between Menambis and Seba, now Ebha. Ptol. — Alfo, an ancient town of Africa, in the vicinity of Tichafa. THABET Ebn Korra, in Biography. See Thebit Ben Corah. THABILIACA, in Ancient Geography, a town of Albania, between the rivers Genus and Soanes. Ptol. THABIR, in Geography, a mountain of Arabia; 20 miles S. of Medina. THABO R, in Jncient Geography. See Tabor. THABORITES. See Tabokites. THABRACA Colonia, Tabarha, in Ancient Geogra- phy, a town and Roman colony of Africa, in Numidia, ac- cording to Ptolemy. It was fituated on the weftern bank, and near the mouth of the river Tufca. Some veftiges re- main of walls and ciilerns. THABUCA, a town of Spain, in the interior of the Tarragonenfis, belonging to the Varduli. Ptol. THACAS, Saxac, in Antiquity, a general name given to the place or feat where the augurs made their obfervations. THACCONA, in Ancient Geography, a town of Afia, in Babylonia, upon an arm of the Euphrates. Ptol. THACES, a people of Scythia, on tliis fide of the Jmaus, and near it. Ptol. THACK Tyles. ■ See Tvle. TH^MA, in Ancient Geography, a town in the interior of Arabia Deferta. Ptol. TH^NA, or Th^en,?:, a town placed by Strabo, Pliny, and Ptolemy, on thecoaft of Africa, towards the commence- ment of the LefTer Syrtes. — Alfo, a town of Afia, in Syria, fituated, according to Ptolemy, in Cyrrhcftica. THAGIA, in Geography, a town of Africa; 1 00 miles S.S.W. of Fez. THAGORA, TiNGORAN, in Ancient Geography, a poft of India, at the bottom of a fmall gulf, in the eailern part of the peninfula, beyond the Ganges. THAGULIS, a tov/n of Africa, fituated between the Two Syrtes. Ptol. THAHAR KiAMEN, in Geography, a poft of Chinefe Tartary ; 15 miles N.E. of Tcitcicar. THAH ATH, in Ancient Geography, the place of the 23d llation of the Ifraelites, where they encamped, after having left Mauloth ; fituated in the defert of Arabia, S. of Mauloth. TRAINEE, in Geography, a town of Africa, in the kingdom of Tunis, near the eait coaft, but without a harbour, at a fmall diftance from the mouth of a river of the Canic name : 120 miles S. of Tunis. T H A THAIS, a town of France, in the department of Paris ; 2 leagues S.S.E. of Paris. Thais, a name given by ^ginctato a cofmetic cerate, in- tended to give a beautiful red to the face. Galon ufes the fame word to exprels a fort of bandage. THALA, Ferre Anach, in Ancient Geography, a town of Africa, in Numidia, according to Salhift and Tacitus. — Alfo, a mountain of Africa, in Interior Eibya, and the people in- habiting its vicinity were called Thal^e. THALACH, in Geography, a river of Bavaria, which runs into the Schwarzach ; 5 miles W. of Greding. THALAMEGUS, among the .(^n<:;Vn/j, a (hip of plea- fure, or yatch ufcd by princes. It was always provided with a good cabin, or bed-chamber. See Ship. THALAMI Nervorum Opticorum, in Anatomy, Xw'io em- nences in the brain. See Brain. THALAMIA, in Botany, i'ec Lichenes, one of whofe kinds of Apolhecium, or receptacle, is fo denominated by Acharius. THALAMII, among the Ancients, thofe rowers who fat in the-loweft part of the fhip. See the next article. THALAMIT^iE, in the Nairn! ArchiteSure of the An- cients, a term ufedto exprefs thofe rowers in the polycrote gal- leys, or thofe who contained feveral feries of rowers, who fat on the thalamus of the vcfi'el, and made the loweft row. Thefe moved their oars and hands under the feats of the row that fat next above them. See Polycrota. THALAMIUM, among tlie Ancients, a port-hole, through which the oars of the rowers in the bottom of the fliip went. THALAMUS, in Botany, a term ufed to exprefs that part of the flower in the capitated or flofculous-flowered plants, where the embryo fruits of every fcparate flofcule are lodged, and where afterwards the feeds are contained. This is the bottom of the cup, in the central part of which it ad- heres to the ftalk. THALASSAR, in Ancient Geography, a province of Afia, between Mefopotamia and Armenia. THALASSOMELI, the name of a medicine ufed as a purge among the ancients. It was compofed of equal parts of honey, fea-water, and rain-water, expofed to the fun in the dog-days, in a veflel pitched on the infide. It purged in the fame manner that fea-water alone would do, but only in a milder way. THALASSUS, in Ancient Geography, a town or port in the fouthern part of the ifle of Crete. THALATHA, a town of Afia, in Babylonia, on the banks of the Tigris, and S. of Apamea. THALATTA, a lake or marfli, at the foot of mount Caucafus, in the environs of the people called " Coraxi." It difcharged its waters into the Euxine fea, near a place called Beithea-Ponti. THALBIS, a river of Albania, between the Gerrus and the Soanes. Ptol. THALEA, a town of Paleftine, in the tribe of Simeon, according to the book of Jofliua. THALER, in Commerce. See Rixdollar. THALES, in Biography, the founder of the Ionic fchool, and of the fcientilic method of philofophifing r;mong the Greeks, was born of Phoenician parents, at Miletus, in the firfl year of the 35th Olympiad, or about the year 580 B.C. He acquired wealth and diftinftion among his coun- trymen, and was employed at an early age in public af- fairs. He dechned involving himfelf by marriage in the cares of a family, that he might devote his whole time and attention to the ftudy of philofophy ; alleging, as it is faid, to his mother, who urged him to marry, at aij early age "it T H A «' it is too fooii," and at a more advanced period " "t '^to" late." In order more entirely to difeiigage himfelf from every avocation that would divert his mind from his fa- vourite purfuits, he commiited tiie care of his eftate to his filler's fon, whom he adopted. In fearch of wifdom, he travcUcd to Crete, and afterwards to Egypt. From the pricfts at Memphis in the latter country, he is faid by feveral writers to have gained his knowledge of philofophy and ma- thematics. But it is more probable that he was more in- debted to his own talents and afQduity in the exercife of them, than, to any communication from them ; and accord- ingly it has been affirmed, that he taught them how to mea- fure the height of their pyramids. Upon his return to Miletus, he was univcrfally refpeiSled for his extraordinar)- wifdora and learning; and his acquaintance was eagerly courted by all who widied to improve in knowledge or to be ranked among philofophers. He was not prevented, however, by tliefe engagements from profccuting his mathe- matical, philofophical, and mctaphylical ftudies. In this courfc of improvement and«fefulnefs, and of imparting, as well as of acquiring knowledge, he protrafted his life to the great age of ninety years, and died, through mere in- firmity, whilil he was attending the Olympic games. Thale's was ranked among the feven wife men of Greece, and might juftly be reckoned one of this number, whether we confidcr his fcientific attainments, or the moral maxims and aphorifms which are afcnbed to him. Of thefe maxims, we fhall feleft the following: " Neither the crimes, nor the tlioughts, of bad men are coneealed from the gods. Health of body, competent fortune, and a cultivated mind, are the chief fources of happinefs. What is the moft difficult thing ? To know one's felf. What the eafieft ? To give advice to others. How fhall we bell attain to virtue ? By abftaining from all that we blame in others. Parents may ex- peA from their children that obedience which they paid to their own parents. Take more pains to correft the blemifhes of the mind, than thofe of the face. Stop the mouth of flan- der by prudence. Be careful not to do that yourfelf, which you blame in another. Friends fhould be remembered when abfent, as well as when prefent." Laertius. Brucker by Enfield, vol. i. For an account of his philofophical doc- trines and other particulars, we refer to the article Ionic SeS. THALETAS of Crete, a famous lyric poet, celebrated by all ?.ntiquity as a medical mufician, is faid to have delivered the Lacedaemonians from the peflilence by the fweetnefs of liis lyre ; but credulity in the powers of mufic muft be very llrong indeed, in thofe who could believe it poflible for mu- fic to drive away the peftilenre. Thaletas, however, was univerfally believed to have poirefTed this power ; but it is irapoffible to render the fact credible, without qualifying it by feveral circumftances omitted in the relation. In the firft place, it is certain that this poet was received among the La- cedjemonians during the plague, by command of an oracle ; that by virtue of this miflion, all the poetry of the hymns which he fung, mufl have confifled of prayers and fupplica- tions, in order to avert the anger of the gods againil the people, whom he exhorted to facrifices, expiations, purifica- tions, and many other afts of devotion ; which, however fuperflitious, could not fail to agitate the minds of the m.ul- titude, and to produce nearly the fame effefts as public faflrs, and, in Cathohe countries, proceffions, at prefent, in times of danger, by exaltiiig tne courage, and by animating hope. The difeafe having, probably, reached its higheft pitch of malignity when the mufician arrived, mufl afterwards have become lefs contagious by degrees ; till, at length, ceafing of itfelf, by the air wafting away the feeds of infec- 10 T H A tion, and recovering its former purity, the extirpation of the difeafe was attributed by the people to the mufic of Thaletas, who had been thought the lole mediator, to whom they owed their happy deliverance. This is probably what Plutarch means, who tells the ftory ; and what Homer meant, in attributing the ceffation of the plague among the Greeks, at the fiege of Troy, to mufic. " With hymns divine the joyous banquet ends. The Paeans lengthen'd till the fun defccnds : The Greeks reflor'd, the grateful notes prolong ; Apollo liftens, and approves the fong." Pope's Homer's Ihad, book i. For the poet, in this paflage, feems only to fay, that Apollo was rendered favourable, and had delivered the Greeks from the fcourge with which they were attacked, in confequence of Chryfeis having been reflored to her father, and of facri- fices and offerings. This poet-mufician has been confounded by fome writers with Thales the celebrated Milefian philofopher ; but ac- cordingto Plutarch (in Lyciu-g.) he was cotemporary with Lycurgus the Spartan legiQator, and lived about three hun- dred years after the Trojan war. Plutarch alfo informs us, that though Thaletas was only flyled a lyric poet and mu- fician, he was likewife a grert philofopher and politician ; infomuch that Lycurgus brought him from Crete, when he returned from his travels, to Sparta, in order to have af- fiflance from him, in ellabhfhing his new form of govern- ment. His odes, continues Plutarch, were fo many exhort- ations to obedience and concord, which he enforced by the fweetnefs of his voice and melody. Plato, likewife, defcribes his captivating manner of fmging ; and Plutarch, in his Dialogue on Mufic, afcribes to Thaletas many mufical com- pofitions and inventions : fuch as Paeans, and new meafures in verfe, as well as rhythms in mufic, which he had acquired fVom the flute-playing of Olympus, whom he at firfl had imitated. Porphyry, in his Life of Pythagoras, fays that this philofopher ufed to amufe himfelf with finging the old Paeans of Thaletas ; and Athensus likewife tells us, that the Spartans long continued to fing his airs ; and, accord- ing to the fcholiaft on Pindar, this poet-mufician was the firfl who compofed the Hyporchemes for the armed, or military dance. There was another poet and mufician of the name of Thaletas, who was likewife a Cretan, but who flourifhed much later than the cotemporary and friend of Lycurgus. TH ALFANG, in Geography, a town of France, in the department of the Sarre ; ii miles S.S.W. of Traarbach. THALHEIM, a citadel of Bavaria, in the territory of Nuremberg ; 6 miles S.E. of Herfbruck. THALIA, in Botany, was fo named by Linnaeus, in memory of John Thalius, a phyfician at Nordhaufen, in Germany, who wrote Sylva Hercynia, a catalogue of the plants of the Hercynian foreft towards Saxony, which ac- companies the Hortvs Medicus of Joachim Camerarius, both having been printed together at Francfort on the Maine in 1588 ; and they are both illuflrated by excellent wooden cuts. Thalius died in 1587, of a fraAured thigh, in con- fequence of a fall from his carriage. His work abounds with original defcriptions and remarks ; but as Haller ob- ferves, it is not eafy to afcertain all the numerous fpecies or varieties of which he treats. The genus before us was ori- ginally called CoRTUSA by Plumier ; but that name remains with a very different plant, as the reader will find its pro- per place. — Linn. Gen. 4. Schreb. 6. Wilk PL V. I. 15. Ait. Hort. Kew. v, i. 3. Rofcoe T- ^ K ooC. T H A T II A Soc. V. 8. 340. t. 20. f. 3. Brown Prodr. Nov. HoU. v. I. 307. Purih 584. JufT. 63. (Cortufa; Plum. Gen. 26. t. 8. Peronia; Redout. Liliac. v. 6. 342.) — Clafs and order, Monandria Monogynia. Nat. Ord. Scitaminee, Linn. Canrnc, Juff. Cannes, Brown. Gen. Ch. Col. Perianth fuperior, of three equal, ovato- lanccolate, permanent leaves. Cor. of one petal, irregular. Tube none. Limb double : the outer divided to the bafe into three equal, oblong, concave fegments, much longer tlian the calyx : inner two-lipped ; its upper lip convolute, abrupt, flightly three-lobed, hardly fo long as the outer limb ; lower twice as long, deeply three-lobed, with two awl-fliaped appendages, the central lobe contrafted in the middle. Stam. Filament one, declining, linear, dcprefied, the length of the upper lip, and attached to one of its edges ; anther fimple, ovate, of one cell, opening inwards. Piji. Germen inferior, roundifh ; ftyle cylindrical, longer than the ftamen, revolute ; lligma irregular, ringent, per- forated, beardlefs. Perk. Berry oval, of one cell, with a thin pulp. Seed folitary, large, oval, with a large horny albumen, and a folitary, central, curved embryo, accom- panied by an empty cell. Eff. Ch. Calyx of three leaves. Corolla of one petal, in five deep unequal fegments, without a tube. Anther fimple, ovate. Style recuived. Stigma ringent, perforated. Berry with one feed. Obf. The characters and ftrufture of the flower have in few genera been involved in fo much uncertainty as in Thalia. We have endeavoured to draw up as corredl a defcription as we could, from Mr. Sowerby's excellent plate of Thalia dealbata, publifhed in 1794, by the late Mr. Frafer, and de- lineated under our infpeftion. Mr. Brown's learned remarks have affifted us as to the feed. The above defcription will be found to agree with Plumier's account of the original fpecies, as far as any thing can be underftood from thence ; leaving little doubt that the two plants in queftion form one genus. Linnseus has left many manufcript correftions of his generic charafters of Thalia, we know not from whence de- rived, which, though they accord as far as they go with our obfervations, do not fuperfede them. The prefent genus, no doubt, is next akin to Maranta, but their differences will appear evident from a comparifon of their defcriptions. They both belong to the new order of Cann£, or Cannetkrs, whofe //«-««;/. f ^g'"^- duaUy dilated upwards, approaching to thofe of 1 .Jhrnun-um hereafter defcribcd. 14 T. pubefctns. Downy Polygamous Meadow-rue. Purih n. 4. Muhlenb. Cat. 54 Leaflets ovate, fome- wl.at heart -ftiaped, or wedge-fliapcd ; threc-lobed at the end ; (lightly downy beneath. Panicles terminal. !• lowers polygamous. Anthcj-s linear. Styles awl-lhaped, twice as long^as the germcns.— On the banks of ditches and rivulets, i:>, Peniifylvania and Virginia, flowering from .lune to Auguft. A tall fpecies, with white fiowers. Purfli. We have this flora our late venerable correfpondent, the Rev. Dr. Muh- lenberg. The kijfl-ts are rather large ; dark green, and fomcwhat rugged, above ; paler, reticulated with prominent veins, and minutely downy, at the back. Flowers nearcft to thofe of T. diokum, and hke them diftinguifhed by long tapering jligmas. The anthers are linear-oblong ; their f laments almoft equally flender throughout. \^.T. angujlifolium. Narrow-leaved Meadow-rue. Linn. Sp, PI. 769. Willd. n. 14. Ait. n. 13. Jacq. Hort. Vind. V. 3. 25. t. 43 Leaflets linear-lanceolate, or linear, mofl.ly undivided, entire. Panicle much branched, denfe. rlowers ereft. Stigmas heart -fhaped, half the length of the germens. Native of Switzerland and Germany, but not frequent any where. Dr. Sibthorp, however, gathered it on the Bithynian Olympus. Miller fecms to have cultivated it, in his time, at Chelfea, but we have fcarcely ever feen a living fpecimen, and we are much inchned to concur in opinion with thofe who judge it a variety of the following, their habit, inflorefcence, :mdjh)iuers, being exaftly the fame, however diiferent the breadth of their kaflets. Bauliin's fynonym, uniformly referred to this, certainly belongs to T.Jlmplcs, n. 17. 16. T. flavum- Common Meadow-rue. Linn. Sp. PI. 770. Wi'lld. n. 15. Fl. Brit. n. 4. Engl. Bot. t. 367. Fl. Dan. t. 939. (T. nigricans ; Jacq. Aiiflr. v. 5. 10. t.421. Willd. n. 16. T. nigrius, caule et femine ftriato ; Bauh. Hift. v. 3. 486. T. majus, foliis rugofis trifidis ; Morif. feft. 9. t. 20. f. 3.) — Leaflets rounded or oblong, three-cleft. Panicle mucii branched, denfe. Flowers ereft. Stigmas heart-lhaped, half the length of the germens — Found in moift meadows, and the reedy margins of rivers, throughout Europe, from Sweden to Greece, flowering in July. The root is yellow, perennial. Stem three feet high, ercft, fmooth, leafy, furrowed or angular, fimple below. Leaves nearly feffile, twice ternate, with a fhort flieathing bafe, ox footjlalk ; leaflets flightly glaucous, mofl fo beneath ; either undivided or three-cleft, entire, veiny, varying ex- tremely in breadth, length, and (harpnefs. Panicle terminal, ereft, denfe, corymbofe, much branched, fomewhat leafy. Flowers and flamens ereft, ycUowifh-white, with oblong, flightly pointed, yellow anthers. Stigmas oblique, heart- fhaped, downy. Seeds deeply furrowed. The vague re- femblance of this plant to the garden rue, and its place of growth, feem to have given the Englilh name of the whole genus. .lacquin's nigricans, found frequently in England, differs merely in the elongation and comparative narrownefs 9 of its kiijl.ts, wluch approach in tliufc rcfpeits to tlic mgiij- /j/b/i,. Rolziui, ill his Olf. Bot. fafc. 6. 30. feci.. 52, juiHy indicates the identity of Jacquiu's T. atropurpureum and the Liiimaii aquilegifolium, confcfiiiig ho could not decide concerning the aquilegifalimr. of Jacquin. We have a wild Swifs fpecimen of tlie latter, Haller's n. 1141, pre- cifeiy anfwerinjr to the plate in Fl. Aitjlrka, and certainly not differing in any eflential charafter from the true plant of Linnasus, fo frequently cultivated for ornament, and prefervedin his herbarium. 20. T. coiitortum. Twifted-feeded Meadow-rue. Linn. Sp. PI. 770. Am. Acad. v. 4. 47. Willd. n. 20. Ait. II. 18. — " Fruit pendulous, triangular, contorted. Stem rather two-edged." — Native of Siberia. Linna;us thought it a hybrid offspring of aquilegifolium impregnated by the minus. His fpecimen is not to be diftinguifhed from the former, and we cannot but agree with Willdenow's remark, that the contortion of the feeds is merely a fign of imper- feftioii. Neither can any more fohd depcndance be had on the comparative number of the parts of fructification, on t he white colour of the flowers, or the humbler Itature of the herbage. We conclude this fuppofed fpecies therefore to be fcarcely even a variety of the lall. 21. T. pelaloiJeum. Daurian Meadow-rue. Linn. Sp. PI. 771. Willd. n. 21. Ait. n. 19. (T. ftamineum ; Linn. Suppl. 271.) — Leaflets rounded, obtufe ; partly three- lobed. Stem nearly leaflefs. Panicle fomevvhat umbellate. Stamens much dilated, linear -obovate. Germens feilile Native of Siberia. Mr. Loddiges is faid to have intro- duced this curious and very diilmtl fpecies to the know- ledge of our cultivators, in 1799. It has a perennial root, with long, fimple, r.itlicr flefliy fibres. Stem fimple, about a foot high, ftriated, purple at the bottom, leaflefs, except an occafional leaf, accompanying a fmall lateral branch. Radical leaves two, fpreading, thrice compound, on pur- plifli fl:alks ; leaflets very much like Common Rue, but fmaller. Flowers white, large but not numerous, in a fort of corymb, or imperfcft umbel, accompanied by a few fmall leaflets. Petals roundifh, deciduous. Stamens very nume- rous, white, flat, and fmgularly dilated, with a mid-rib ; their anthers yellow, narrow and fliort. Germens ovate, ribbed, with awl-(hapcd recurved [iigmas. Willdcnow makes T. flamiiuum a variety, little fuppofing that the very identical Ipecimens, fo minutely and accurately defcribed in the Species Plantarum, could be again defcribed, without a reference, in the Supplementum. We have to exclude T. japonicum, Thunb. Tr. of Linn. Soc. V. 2. 337. Willd. n. 22, a fpecimen from Thunberg himfelf proving it to be no other than Coptis afplenifoiui of Mr. Sahlbury, Tr. of Linn. Soc. v. 8. 306, a circumfl;ance as wonderful as that its difcoverer fhould ever have thought this plant fimilar to a Salvia. See Fl. Jap. 364. 7". ranunculinum, Willd. Enum. Hort. i3erol. 585. Purfh n. 6, having iimple leaves, and being not noticed as a Tha- liclrum by Muhlenberg himfelf, who is quoted for it, is, we prclume, belt omitted here ; as well as T. concinnum, Willd. Enum. 584, Vv'hich is probably comprehended under fome of the foregoing fpecies. TiiALlCTHUM, in Gardeuiiig, contains plants of the hardy, herbaceous, fibrous-rooted, perennial kinds, among the number of which the fpecies inoftly cultivated are ; the tuberous-rooted meadow-rue (T. tuberofum); the Cana- dian meadow-rue (T. cornuti) ; the fetid meadow-rue (T. foetidum) ; the narrow-leaved meadow-rue (T. angufli- folium) ; the fliining-leaved meadow-rue (T. lucid\mi); and the columbine-leaved meadow-rue, or feathered colum- bine (T. aquilegifolium). In the fecond fort there is a variety, which is fmaller, wjth pale purple filaments, than the common kind. .\lio in the (ixtli fort there are varieties with a green llalk and white llamens, and with a purple Italk and llamens. Bcfides, there are other forts that may be cultivated for variety. Method of Culture. — All the forts are readily increafed by parting the roots, and plariting them out in the autunu: when the ftems decay, or in the fpring before the new- ones are fet forth, the ftrongell where tiiey are to remain, and the weaker ones in nurfery-rows for further growth : they may alfo be railed from feeds, which rtiould be fown in a bed or border in the fpring : when the plants rife, they Itiould be kept clean, and be planted out where they are to remain, in the following autumn. Tliey are all hardy durable plants that fucceed and grow well in any common foil and expolure in the open ground, but which flourifti moll in moill Ihady fituations. They afford variety in the borders, and other parts of ornamented grounds, when fel out in a properly varied manner, requiring but little trouble or attention in fuch fituations. THALINA, in ylncient Geography, a town of Afia, in the Greater Armenia, upon the banks of the Euphrates. Ptol. THALLABA, Talaban, a town of Aha, in Mefo- potamia, upon the banks of the river Chaboras, fituated E.S.E. of Refa:ina. THALLAND, In Geography. See Dalia. THALLITE, in Mineralogy; Epidote, Haiiy ; Delphi- nite, Saullure ; Shorl -vert du Dauphiny, Romfe de Lifle ; Acanticene, Dendrada ; Piflacit, Werner. Few minerals have received fo many names as this : it is at prefent better known by the name of epidote or thallite. It has frequently been confounded with aflinolite or ftrahlftein, and with green hornblende and green afbeftus. Some account of this mineral is given under Pistacite. We fliall here add its diftinAive charafters and conflituent parts. From aftino- lite it may be diftinguiflied by the colour, the latter being generally a lighter green. The ftrufture of the maffive varieties of aftinolite is generally radiated, that of epidote compaft or foliated. Both the joints of aftinolite are dif- tinftly feen ; but in epidote, frequently one joint only is feen. Epidote melts into a blackifh fcoria before the blowpipe, and is harder than aflinohte or hornblende ; the latter has generally a different (hade of green : the frafture of hornblende is alfo lefs vitreous than that of epidote. Green albeftus is foft when pounded ; the powder of epidote is harfh and rough. Thallite or epidote occurs both maffive and cryftallized. The joints are in two direftions, one of which is more obvious than the other. The alternate angles are about 114^° and 655°; the crofs frafture is fplintery. The primitive form or the cryflal is a prifm with rhom- boidal bales. The moft common forms are fix or eight - fided prifms, of which four are larger than the others. Thcfe prifms are terminated by feveral oblique planes, and are often flatly acuminated : the terminating planes of the cryftals are fmooth, and have a high natural polifii ; they are fometimes convex. The lateral planes, or fides of the cryfl;als, are ftriated. This mineral is found in beds and veins, and fometimes as a conflituent part of rocks. It is affociatcd with augitc, garnet, hornblende, quartz, calca- reous fpar, and magnetic iron-ftonc. The varieties that occur in veins are of a lighter colour, and the cryftals are more acicular than thofe which are found in beds. The veins contain felfpar, axinite, rock-cryftal, chlorite, and other minerals ; the epidote forming only a fmall part of the fubftance of the vein. It is found in feveral parts of the Scotch Hebrides, and in various alpine diflrifts, in fienite, porphyry, and granitic rocks. The fined cryftals have been procured at Arundel in Norway. The con- flituent T H A ftituent parts of this mineral, from different fituatlons, a^rce more nearly tl.an is frequently the cafe with other minerals. FromiheVal.is. FiomOifcna. From Arundel. SileK - - 37-0 37-0 37 Aluminc - - 26.6 27.0 21 Lime - - 20.0 14-0 15 Oxydofiron - 130 '7-o ^4 Oxyd of maiiganefe 0.6 i.J i-5 Water - - \i-8 3-S '-5 Lofs - - I. o o It differs in chemical compofition from hornblende and aainolitc, by the abfcnce of magncfia, and by the large proportion of alumine which it contains. THALLOPHORI, 9«XXo?)opo., in jlntlquity, the old men and women, who, in the proceflion of the feftival pana- thenaa, carried olive-boughs in their hands. THALLUS, in Botany and Vegetable Phyjwlogy, SaW.oc, an olive bud, or a green bough ; from SajA^w, to be verdant, to float forth, or fpread abroad; a term aptly enough chofen by the diftinguiflied profeffor Acharius, for the froad, or foliage, of a Lichen, whether that part be of a leafy, fibrous, fcaly, or cruliaceous nature. But this term, however apt, is fuperfluous, /row, ufed by Linnsus, being fynonimous with it, and fufficient for every requifite purpofe. See Lichen and Liciienes ; alfo Frond. THALMANSFELD, in Geography, a town of Ger- many, in the marggravate of Anfpach ; 4 miles W. of Thalmeffiug. THALMESSING, or Thalmessingen, a town of Germany, in the principality of Anfpach ; 31 miles S.E. of Anfpach. N. lat. 49° l'. E. long. 11° 10'. THALMIS, or Talmis, in Jncient Geography, a town of Egypt, between Taphis and Tutzis. Anton. Itin. THALPUSA, atown of the Peloponnefus, in Arcadia ; which belonged to the Orchomenians. THALSEA, or Thelsea, a town of Phoenicia, marked on the route from Remmaris to Neapoli^, between Geroda and Damafcus. TH ALUD A, a river of Africa, in Mauritania Tingitana, the mouth of which is placed by Ptolemy on the coaft of the Iberian fea, between Jagath and the promontory Oleaftrum. THALYSIA, SxXu^ia, in Antiquity, a facrifice offered by the hufbandmen after harveft. For the origin and cere- monies of which, fee Potter, Archacol. Grscc. torn. i. p. 400. THAMALAPATHRA. See Folium Indicum. THAMAR, a word ufed by the Arabian phylicians to exprefs a date. Hence a peftoral decoftion, made with dates and other ingredients, was called diathamyron ; and the word was afterwards corruptly written dicameron. Thamar, in Ancient Geography, a town of Judea, near Malis or Malath, which, according to Eufebius, had a Roman garrifon. THAMARITA, a town of Africa, in Mauritania Csefarienfis. THAMARO, a town of Paleftine, on the weftern fide of Jordan. Ptolemy. THAMASCHALTIS, a town of Africa Propria, on the route from the Greater Leptis to Tacapas, between Thramufdifis and Thentei. Anton. Itin. THAMBES. in Geography, a mountam of Algiers ; 30 miles S. of Bona. THAME. See Team. Thame, or Tame, in Geography, a market -town in a hun- dred of the fame name, and county of Oxford, England, is fituated on thebanksof theriverThames (whence it derives its name), at the north-eaftern extremity of the county adjoining to Buckinghamfhire, 1 3 miles E. front Oxford, and 46 miles T H A N.W. by W. from London. Dr. Stukeley calls thi« place Tamefe, and it is unqueflionable that a Roman military- road went tlirough the town, though it was by degrees ne- glefted in the latter times of the empire. Thame was a place of fome confequence in the tenth century ; for wo find that Wulfere, king of Mercia, granted a charter " in the vill called Thama ;" and in the year 970, Ofl(■/• annum. The fchool had been long difcontinued, and its revenue loft to the parifh ; when Mr. Thompfon, a late vicar, inllituted a fuit for their reco- very, and after a long conteft fucceeded in the re-eftablifh- ment of the fchool, with an income for the mafter increafed to 200/. pn- annum ; forty boys are now clothed and educated, and fix of them annually apprenticed with premiums of 10/. each. Tlie parirti of Thatcham is the moll extenfive of any in the county, excepting Lamborn, and includes fix town- ftips. The' population, according to the parliamentary re- port of the year 181 1, was eftimated at 2104; the number of houfes at 424. — Lyfons's " Magna Britannia," vol.i. Berkfhire. THATCHER, a rock in the Englilh Channel, on the north fide of Torbay. Thatcher, in Rural Economy, a perfon who performs the bufinefs of thatching. THATCHING, the operation of covering the roofs of buildings, ftacks, and other things, with fome fort of thatch. For this purpofe, articles of the ftraw kind are pre- pared in the following manner :' After being well moiftened with water, they are drawn out in handfuls perfectly ftraight and even into regular lengths, and the (hort ftraw feparated from them, leaving them placed in convenient ranges for forming bundles to be carried to the thatcher by the perfon who has the ferving of him. In reg?.rd to the application of the thatch to ftacks of hay or corn, there are different methods purfued, ac- cording to the nature of the materials employed. Where long ftraw is made ufe of, tlie operator or workman ufually begins at the eaves or bottom part of the roof, depofiting it in handfuls in regular breadths till he reaches the top, the different handfuls being fo placed endways as to overlap each other, the upper ends being conftantly pudied a little into the bottom parts of the (heaves or other matters. In this manner he gradually proceeds, breadth after breadth, till the whole of the roof is covered, which is ufually done to the thicknefs of about four or five inches. And in order to retain the thatch in its place, fliort fliarp-pointed fticks, termed prods in fome places, are occafionally thruft in, in a flanting direftion upwards ; and fometimes fmall fticks, often called fpelks, ftiarpened at the ends, are bent and thruft in along the top parts and fides. But as the water is apt to follow the courfe of the fticks, it is perhaps a better praftice to make ufe of ropes of twifted llraw for this purpofe. In fome cafes, thefe are applied only round the bottom parts of the roof and the fides ; while in others, which is a much better and more fecure method, they are applied in fuch a manner over the whole ftacks, as to form a fort of coarfe net-work of nine or twelve inches in width in the niches, the ends being well faftened either to belt-ropes paiTed in fuitable directions for the purpofe, or to different parts of the ftraw of the ftack. Ill t.hc application of ftubble as a thatch, it is mollly, 7 T H A after being prepared, put on by fticking one cf its ends into the roof of the ftack in a regular and ex aft manner, fo as that it may ftaud out very clofe and thick ; when the other, with fuch loofe ftraws as may occur, is to be cut over or pared off, with a very ftiarp tool for the pur- pofe, fo as to form a neat and impenetrable thatch, having the appeaiance of a newly thatched houie roof ; the whole being well fccured in its place by ftiort pegs made for the purpofe, fomewhat in the fame way as in the thatch of other ftacks. In the thatching of the roofs of houfes or other buildings with any of the different forts of ftraw, the materials are to be laid on to a confiderable thicknefs, and firmly fecured. They are applied in regular narrow flips, or what in fome diftrifts are termed ^(7«fx, from the eaves of the building to the ridges, the ladder being moved forward as the work pro- ceeds. The thatch is fecured by fliort ftiarpened fticks, as above, thruft in where neceffary. And bended fticks, iharpened at each end, are hkewife fometimes made ufe of near the ridges, being thruft in at each end. In finilhing the work, the thatcher moftly employs an iron-toothed rake, with which the whole is raked and trimmed over from top to bottom, fo as to render it completely fmooth and even, and take away all the fliort ftraws, and other irregular matters. The method of thatching with reed, according to Mr. Mardiall, in his account of the Rural Economy of Norfolk, is this : no laths being made ufe of, in laying it, a little of the longeft and ftoiiteft of the reed is fcattered irregularly acrofs the naked fpars, as a foundation to lay the main coat upon : this partial gauze-like covering is called the " fleaking." On this fleaking the main covering is laid, and faftened down to the fpars by means of long rods, provinciaily " fways," laid acrofs the middle of the reed, and tied to the fpars with rope-yarn, or with " bramble bonds," formerly much ulcd, but now pretty nearly laid afide. In laying on the reed, the workman begins at the lower corner of the roof, on his right hand, for inftance, and keeps an irregular diagonal line, or face, until he reaches the upper corner to his left, a narrow eaves-board being nailed acrofs the feet of the fpars, and fome fleaking fcattered on ; the thatcher begins to " fet his eaves," by laying a coat of reed, eight or ten inches thick, with the heads refting upon the fleaking, and the butts upon the eaves-board. He then lays on hh fiuay (a rod about the fize of a fmall edder) about fix or eight inches from the lower point of the reed ; whilft his afllftant, on the infide, runs a needle, threaded with rope-yarn, clofe to the fpar ; and, in this cafe, clofe to tlie upper edge of the eaves-board. The thatcher draws it through on one fide of the fway, and enters it again on the contrary fide, both of the fway aiid of the fpar : the affiftant draws it through, unthreads it, and with the two ends of the yarn makes a knot round the fpar ; thereby drawing tlie fway, and confequently the reed, tight down to the roof : whilft the thatcher above, beating the fway and prefling it down, affdls in making the work the firmer. The affiftant having made good the knot below, he proceeds with another length of thread to the next fpar, and fo on, till the fway be bound dowu the whole length ; namely, eight or ten feet. This being done, another ftratum of reed is laid on upon the firft, fo as to make the entire coat eighteen or twenty inches thick at the butts ; and an- other fway laid along, and bound down, about twelve inches above the firft. The eaves being thus completely fet, they are adjufted and formed, not fquare with the fpars, but nearly horizontal : nor are they formed by cutting, but by " driving" them with a " legget," a tool made of a board eight or nine inches fquare, with a handle two feet long, fixed upon die back of it. T H A T H A it, obliquely, in the manner of the tool uftd Ly giirdrners in heating turf. The face of the legget is fet with large- headed nails, to render it rough, and make it lay hold of the butts of the reeds. Then another layer of ixcd is laid on, and bound down by another fway, fomewhat (liorter than the lail, and placed eighteen or twenty iiicht. s above it ; and above this another, and another, continuing to fhorten the fvvays, until they be brought off to nothing, and a triangular corner of thatching formed. After this the fways are ufed their whole length, whatever it happens to be, until the workman arrives at the fniilhing corner. In order to give a liniih to the ridge, a cap (provincially a " roof") of ftraw is fet on in a mafterly, but in an expenfive manner. In this operation, the workman begins, it is ob- ferved, by bringing the roof to an angle, with llraw laid the long way upon the ridge, in the manner in whicli a rick is topt up ; and to render it firm, to keep it in its place, and to prevent the wind from blowing it off, or ruffling it, he pegs it down nightly with " double broaches ;" namely, cleft twigs, two feet long, and as thick as the finger, fliarpened at both ends, bent double, and perhaps with the twilling of the crown, and perhaps barbed, by partial chops on the fides, to make them hold in the better. This done, the workman lays a coat of ftraight ftraw, fix or eight inches thick, acrofs the ridge ; beginning, on either fide, at the nppermoft butts of the reed, and finifliing with ftraight handfuls evenly acrofs the top of the ridge. Having laid a length of about four feet in this manner, he proceeds to faften it firmly down, fo as to render it proof againft wind and rain. This is done by laying a " broachen ligger" (a quarter-cleft rod as thick as the finger, and four feet in length) along the middle of the ridge, pegging it down at every four inches with a double broach, wiiich is firft thruft down with the hands, and after- wards driven witli the legget, or with a mallet ufed for this purpofe. The middle ligger being firmly laid, the thatcher fmooths down the ftraw with a rake and his hands, about eiglit or nine inches on one fide, and at fix inches from the firft lays another ligger, and pegs it down with a fimilar number of double broaches, thus proceeding to fmooth the ftraw, and to faften on liggers at every fix inches, until he reach the bottom of the cap. One fide finiftied, the other is treated in the fame manner ; and the firft length being completed, another and another length is laid, and finiftied as the firft, until the other end of the ridge be reached. He then cuts off the tails of the ftraw fquare and neatly with a pair of fiiears, level with the uppermoft butts of the reed ; above which the cap (or moil properly the rooflel) fiiews an eaves of about fix inches thick. And laftly, he fweeps the fides of the main roof with a bow of holly, when the work is completed. This, when well performed, muft be a durable and ufeful mode of thatching, and at the fame time one which has a neat appearance. In thatching with heather, that material moftly under- goes fome fort of preparation, fo as to render it as equal as poffible in fizeand ilrength, being laid and faftened upon the roofs then in fomewhat the fame manner as that of ftraw. It is afterwards fvvept, cleaned, and finiftied off in a neat and exaft manner, fo as to look extremely well. In fome of the more expofcd fituations in the northern parts of the ifland, they have other modes and praftices of thatching buildings with ftraw in ufe, fuch as performing it with clay, or thin turf and that material. If the roof be covered with thin turf or divots, the work- man is to twift the upper part of the ftraw into a fort of knot ; then, with a ftick prepared for the purpofe, to force the knot thus forrr^d either under or through the turves or divots, fo that it may have a firm hold of the roof ; after \Thich, to fpread the lower part of the bundle of flraw nicely on the roof, continuing to do the fame to the very top of the roof ; and then to clay it all over, and begin an- other tier, gang, or row of the thatch. In this way, the thatch fliould not be laid tliinner than fix inches, and when it is laid eight inches thick, it is the more durable. Thin turf, or divots, were originally thought the beft foundation ; but it has been fince found by experience, that they rot the ftraw, and that ftraw alone, when ftilched on with rope-yarn, lafts much longer. If ftraw alone be ufed in this manner, it will laft twenty years ; but the ftraw muft be laic^on two inches thicker than when clay is added. A roof that is thatchecf with divots, ftraw, and clay, in the common way, will laft from feventeen to twenty years ; and is alfo capable of being mended witliout raifing any part of the roof that is entire. The above kind of roof is much lefs liable to catch fi-re than ftraw roofs without clay. The clay that anfwers the pur- pofe beft is that which has a due proportion of fand in it. If lliff clay fliould be ufed, it will be neceffary to add one cart-load of fand to every two of the clay. This fort of claying may, of courfe, be ufeful and advan- tageous in thatching the roofs of buildings in many fitua- tions and places. THAU, in Geography, a lake of France, in the depart- ment of the Herault, near the Mediterranean, between Frontignan and Agde. THAUANA, in Ancient Geography, a town fituated in the interior of Arabia Felix. THAUBA, a town in the interior of Arabia Felix. Ptol. THAUGHTS, or Thoughts, in a Boat, are the benches on which the rowers fit to row. THAUMASIUS Mons, in Ancient Geography, a mountain of Arcadia, N.W. of Mantinea, above the river Moloffus. THAUMATURGUS, formed from ^xv,^:^, rjjondcrjul thing, and ^fyov, tvork, luorher of miracles ; an appellation which the Romanifts gave to feveral of their faints, eminent for the number and greatnefs of their miracles. St. Gregory, called Thaiimaturgus, or Gregory of Neo- C2;farea, was a difciple of Origen about the year 223, and afterwards bifhop of Casfarea, in Pontus ; and in that ca- pacity he affifted at the firft council of Antioch, and at that of Ephefus, againft Paulus Samofatenus. St. Leo of Ca- tanea is alfo called Leo Thaiimaturgus. He lived in the eighth century ; and his body is ftill honoured at Rome, in the church of St. Martin de Tours. St. Francis Paul, and St. Francis Xavier, are the great Thaumaturgi of thefe lalt ages. THAWING, the refolution of ice into its former fl.uid ftate, by the warmth of the air. THAXTED, in Geography, an ancient market-town in the hundred of Dunmow, and county of Effex, England, is fituated 19 miles N.N.W. from Chelmsford, and 43 miles N.N.E. from London. The town was known in the Saxon times, as the church is recorded to have belonged, in the reign of Edward the Confeffor, to the college of St. John Baptift, at Clare, in Suffolk. Thaxted was incorporated by charter of Philip and Mary, which was confirmed by queen Elizabeth ; under this the civil government is veiled in a mayor, recorder, two bailiffs, and twenty principal burgeffes. In the reign of James II. the corporation ex- perienced a temporary iufpenfion ; for being ferved with a writ of quo warranto, the corporate officers, eiti0 perfons perifhed, and more than 30,000 were fold for ftaves. Some priefts were fpared and many citizens fled. Hence we may prcfume, that the number of inhabitants in Thebes and its diftrift might amount to 50,000 of all ages and fexes, without in- THE eluding (lave?. The inhabitants, like thofe of Athens, were divided into three clafl'es ; the firft compofed of citizens, the fecond of naturalized foreigners, and the third of flaves. The Thebans were deemed to be courageous, infolent, and vain ; and murders were frequently the confequence of the moft frivolous quarrels. The women were both well made and generally of a fair complexion, of a noble carriage, and not inelegant drefs ; their voice was remarkably fweet and tender ; and that of the men harfti and difagreeable, and in fome meafure fuited to their charafter. The " facred bat- talion" of Thebes is famous in hiftory. It confifted of a body of young warriors, brought up together, and main- tained at the public expence, in the citadel. Their exev- cifcs, and even their amufements, were regulated by the me- lodious founds of the flute ; and in order to prevent their courage from degenerating into blind fury, care was taken to infpire them v.'ith the nobleft and moft animated fenti- ments. Each warrior chofe from the band a friend, to whom he remained infeparably united. Thefe 300 warrior., were anciently diftributed in troops at the head of the dif- ferent divifions of the army. Pelopidas, who had frequently the honour of commanding them, having made them fight in a body, the Thebans were indebted to them for almoft all the advantages they gained over the Lacedjemomans. Phihp deftroyed this hitlierto invincible cohort at Cheronxa ; and the prince, feeing tfeofe young Thebans ftretched on the Seld of battle, covered with honourable wounds, and lying fide by fide on the ground on which they had been Rationed, could not reftrain his tears, but bore a noble teftimony to their virtue as well as their valour. Travels of Anachar- fis, vol. iii. See Thjva. ThebjB, a town of Upper Egypt, on the right bank of the Nile. According to the ideas given us of this town by Homer, it was the moft celebrated of antiquity. Ancient authors have given very different accounts of its extent. In the time of Strabo, this city had been deftroyed. It had been ravaged by Cambyfes j it was afterwards defpoiled of its riches by Ptolemy Philometer ; and under the reiga of Au- guftus, it was feverely treated by Gallus on account of its rebellion. From this time it fell into a ftate of decline, from which it has not recovered. Tacitus mentions it as a town in ruins ; and Juvenal fpeaks thus of it : This city extended on both fides of the Nile, although it was more particularly fituated on the right bank of this river : a confiderable por- tion of it lay to the left, which, according to Strabo, bore the name of " Memmonium." For a further account of this city, fee Thebes. Theb.^ was a name given to. many ancient towns. Thebe was a town of Afia, in Cilicia hypoplaciana, fituated on a plain, at the foot of mount Placion. — Alfo, a town of Ju- dea, in the half-tribe of Manaffeh, on this fide of Jordan. — Alfo, a town of Macedonia, in the Phthiotide, 100 ftadia from the town of Alos, according to Strabo. — Alfo; a town of Afia Minor, in Ionia, in the vicinity of Miletus Alfo, a town of Greece, in Attica. — Alfo, a town of Afia, in Cataonia. — Alfo, a town of Afia, in S)Tna. — Alfo, a town of Paleftine, in the tribe of Ephraim. — Alfo, a towTi of Arabia Felix, upon the coaft of the Red fea, in the coun- try of the Cinsdocolpites. Ptolemy. THEBAID, TirEBAis, a famous heroic poem of Statins, the fubjeft of which is the civil war of Thebes betwee.n the two brothers Eteocles and Polynices ; or Thebes taken by Thefeus. Statins was twelve years in compofing his Thebaid, which confifts of twelve books : he wrote under Domitian. He is cenfured by the beft critics, as Boflii, &c. for a vicious multiplicity of fables and aftions, for too much heat and 9 extra- THE T 11 E extravagance, and for going beyond the bounds of pro- bability. Several Greek poets had compofed Thebaids, or poems of this name, before liim; the principal were Antagoras, Anti- phaues of Colophon, Menelaus the ^.gcan ; and an anony- mous author mentioned by Paufanias, lib. ix. Ariftotle, prailing Homer for the fimplicity of his fable, oppofes to him the ignorance of certain poets, who imagined that the imity of fable or adlion was abundantly provided for by the unity of the hero, and who compofed Tiieifeids, Herculeids, &c, in each of which, they coUedled every thing that had ever happened to their principal perfon. THEBAIS, or Thebaid, called alfo Snid, in ylncient Giography, a name given to Upper Egypt, from its princi- pal city Thebes. It is in fcripture called Pathros. This is the moft fouthem part of Egypt next to Ethiopia, and is almoft as extenfive as all the other parts of Egypt, in- cluding the country on both fides of the Nile down to the Heptanomis or Middle Egypt ; its beft city, according to the ancients, being Lycopolis, (fee Siux,) on the vreflern, and Antxopolis on the eaftern fide of the river. Thefe dimenfions agree pretty exaftly with the prefent extent of Al Said, the moll northern city of which is Manfelilt. In this part of Egypt there were formerly fevcral cities of great note ; fuch as Lycopolis, on the fcite of which is fup- pofed to be the prefent ManfelQt ; Hypfele, or Aboutig, about a mile W. of the Nile ; Aphroditopolis ; Ptolemais ; Abydus, once the fecond city of the Thebaid, famous for the magnificent palace of Memnon, but in the time of Strabo only a village ; Little Diofpolis, probably the prefent Hou (which fee) ; Tentyra, the inhabitants of which vsrere famous for their enmity to the crocodile, the ruins of which are ftill to be feen at Dendera (which fee) ; Latopolis, or Efneh (which fee) ; Great Apollinopolis, on the fcite of which Etfu is now fuppofed to ftand (fee Apollinis Urbs, and Etfu) ; and Elephantine, on an ifland of that name, where are the ruins of a fmaJl temple. On the eaft fide of the Nile are Antseopolis, on the fcite of which Siout is fuppofed to have been built ; PalTalus, conjedlured to be the prefent Gava-Kiebre, where is feen a very beautiful portico of a temple, with eighteen pillars, in three rows ; Panopolis and Cherarriis, fuppofed to be the fame city, but diftinguifhed by Herodotus ; the fcite of PanopoHs is faid to be that of the prefent Akraim, about a mile from the river; Chenobofcia ; Caene or Neapolis, perhaps the prefent Kene, a fmall town on an eminence, about a mile from the river Coptos or Kept, and called by Phny the emporium of commodities brought from India and Arabia ; Coptos, where Chriftians were formerly very numerous (fee CoPTOs) ; ApoOinopolis (fee Apollini.sUrbs, or ylpoUinopolii Pdr-vaor Kous) ; and Thebes ; which fee. To the fouth of Thebes, and on the fame fide of the river, were the following cities : i;iz. Chnumis or Cnuphis ; Elethya or, city of Lucina ; Onebos, now Comombo, or the hill of Ombo, on which are feen the ruins of an ancient temple (fee Comombo) ; Syene ; Philae, (fee Piiiloe,) an ifland deemed facred from an opinion that Ofiris was buried there. The Thebaid in the firil ages of the church was rendered famous by the number of hermits who reforted thither. Thebais, a river of Afia Minor, in Caria. Pliny fays that it traverfed the town of Tralhs. THEBAN Harp. See Hakp. THEBANUS Ophites, in Natural Hijlory, a name given by fome of the ancients to that fpccies of the ophites, or Terpentine marble, more commonly called ophites niger, the black Terpentine. THEBARMAI, in Antiint Geography, Ormed, a town of Afia, S.W. of lake Spauta, and at fome diftance from it, lies between a mountain and a fmall river that falls into this lake. The worfliip of fire prevailed in this province, under a perluafion that the firll pyraeum was kindled by Zoroafter himfelf. THEBES, the capital city of the Thebais, or Upper Egypt, which was defcrvedly reckoned one of the hnell cities in the world. It was alfo called Diofpohs, or the city of .lupiter, and was built, as fome fay, by Ofiris, but according to others, by Bufiris. Its length, in the time of Strabo, was eighty furlongs, or ten miles ; but this was very inconfiderable, compared with its ancient extent, before it was ruined by Cambyfes, which, we are told, was no left than 420 ftadia, or 52^ miles. Its wealth was fo great, that, after it had been plundered by the Perfians, what was found, on burning the remains of the pillage, amounted to above 300 talents of gold, and 2300 of filver. The 1 00 gates of Thebes are mentioned by Homer, and, after him, by many others ; but fome think that this was not the number of the gates, but of the temples ; and that from them the city had the epithet Hecatompylos, expreffing a definite for an indefinite number. Pomponius Mela, and others, by the 100 gates, underftand fo many palaces of princes, each of whom could, on any occafion, arm aiid fend out 20,000 fighting men, and 200 chariots. A modern traveller could obferve no figns or remains of walls round Thebes : and if it had none, we muft conclude, that by 100 gates, were meant the gates of the temples, or rather the palaces of great men. In Strabo's time the city flood chiefly on the eaft fide of the river. At Thebes there were anciently four remarkable temples 5 one of them is faid, by Diodorus Siculus, to have been i| mile in circnmterence, and 45 cubits in height, with walls 24 feet thick. Tlie venerable ruins of this city, probably the moft an- cient in the world, fays Mr. Browne (Travels, &c.), extend for about three leagues in length along the Nile. Eaft and weft they reach to the mountains, a breadth of about 25 leagues. The river here is about 300 yards broad ; the cir- cumference of the ancient city muft therefore have been about 27 miles. In failing up the Nile, the firft village that occurs within the precinfts is Kourna, on the W., with few houfes, as the people chiefly live in the caverns. Next is Abuhedjodj, a village, and Karnac, a fmall diftridl, both on the E. The largeft portion of the city ftood on the eaftern fide of the river. On the S.W. Medinet-Abu marks the extremity of the ruins ; for Arment, which is about two leagues to the S., cannot be confidered as a part. Modern authors have ftyled the fcite of Thebes, " Luxor" (which lee); and others have denominated it " Akfor ;" both which terms are, in Mr. Browne's opinion, coiTuptions of " El Kaftur,"the appellation ftill appUed to the ruins by the Arabs. The moft confiderable ruins are thofe on the E. of the Nile. The chief of thefe is the " great temple," an oblong fquare building of vaft extent, with a double colonnade, one at each extremity. The mafTy columns and walls are covered with hieroglyphics. The " great temple" ftands in the diftricl called Karnac. Next to this in im- portance is the temple at Abu-Hedjadj, and here are nu- merous ruins, avenues marked with fphinxes, &c. On the W. fide of the Nile appear two coloflal figures, apparently of a man and woman, formed of a calcareous ftone like the reft of the ruins : — remains of a large temple, with caverns excavated in the rock: — the magnificent edifice ftyled the " palace of Memnon," fome of the columns being about 40 feet high, and about 9^ in diameter : the columns and walls are covered with hieroglyphics : this ftands at Kourna. Behind the palace is the paflage denominated 3 M 2 " Biban- T II E «« Biban-cl-Molfik," Icadintj up the mount.iin ; at the ex- tremity of which pudago, iii the lidcs of the rock, are the celebrated caverns known as the fepulchres of the ancient kings. Thefr fepiilclires, which have lately been difcovered, are particularly defcribod by Mr. Browne. In the cells or recclTes of the pafTage of the largell of thefe, appear the chief paintings, reprefenting the iiiyfteries, which, as well as the hieroglyphics covering all the walls, are very frefh. Our traveller particularly obferved the two harpers defcribed by Bruce, but his engraved figures, he fuggefts, feem to be from memory. Although Pococke and many others are of opinion that Thebes was never furrounded by a \vall, Mr. Browne inclines to a contrary opinion, from feme faint remains which are it ill vifible. We are principally indebted to Denon (Travels in Upper and Lower Egypt, in 3 vols. 8vo. tranflatcd by Aikin), for an interfiling account of the magnificent ruins of Thebes, as well as of other places in Egypt, illuftrated by beautiful engravings. Four large hamlets (fays Denon) divide amongft them the remains of the ancient monuTnents of Thebes, whilft the river, by the finuofity of its courfe, feems ftill proud of flowing among its ruins. In croffing the ground occupied by tlie ancient Thebes, Denon found nothing but temples ; not a veftigeof the 100 gates fo cele- brated in hillory ; no walls, quays, bridges, baths, or theatres ; not a fingle edifice of public utility or conve- nience. Temples indeed were numerous, and walls covered with obfcure emblems and hieroglyphics, which attefted the afcendancy of the priefthood, who ftill feemed to reign over thefe mighty ruins. The fpace occupied by this incom- prehenfible town now enfolds four villages and as many hamlets, thinly fcattered over immenfe fields. Faffing through the ten-itory of Thebes on another occafion, Denon faw at the diitance of three-fourths of a league from the Nile, the ruins of a large temple not before noticed by any traveller, which may give an idea of the immenfity of that city, fince, if we fuppofe that it was the laft; edifice on the eaftern fide, it is more than 2-| leagues dlftant from Medinet- Abu, where the mofl weilern temple is Ctuated. The temple, on the fcite of which the village of Karnac has been built, is of fuch a circumference, that it would require half an hour to walk round it. Herodotus has given us a more correft idea of its grandeur and magnificence. Diodorus and Strabo, who examined it in its ruinous fl;ate, appear to have furnifhed a defcription of its prefent condition, but none of the travellers who have copied the accounts of thefe writers haTe prefumed (fays Denon) to prefer to this temple that of Apollinopolis at Etfu, that of Tentyra, and the fimple portico at Efneh. It is probable (fays this writer) that the temples of Karnac and Luxor were built in the time of Sefoftris, when the flourifhing condition of the Egyptians gave birth to the arts among them, and when thefe arts were difplayed to the world for the firll time. Of the 100 columns of the portico of the temple of Karnac or Cariiac (which fee), the fmallcft are yi feet in diameter, and the largeft 12. The fpace occupied by its circum- vallation contains lakes and mountains. This edifice is now in a degraded ftate. Tlie fphinxes have been wantonly mutilated ; and the avenue that leads from Karnac to Luxor, nearly half a league in extent, contains a fucceffion of chime- rical figures to the right and left, with fragments of ftone walls, of fmall columns, and of ftatues. Luxor (which fee), the fincft village in thefe environs, is alfo built on the fcite of the ruins of a temple, not fo large as that of Karnac, but in a better {late of prefervation, the maffes not having as yet fallen through time, and by the prelTure of their own weight. The mofl; coloffal parts con- T H E fift of fourteen columns of nearly eleven feet in diameter, and of two flatues in granite, at the outer gate, buried up to the middle of the arms, and having in front of them the two largeft and bell preferved obcliflis known. A peculiarity belonging to the temple of Luxor, is, that a quay, provided with an epaulement, fecured the caflern part, which was near the river, from the damages the inun- dations might othcrwife have occafioned. The epaulement, which fince its original ftrufture has been repaired and aug- mented in brick-work, proves that the river has not changed its bed; and its prefervation is an evidence that the Nile has never been banked by other quays, fince no traces of fimilar conftruftions are elfew'here to be met with. Nothing can be more grand, and at the fame time more fimple, than the fmall nimiber of objefts of which thts en- trance is compofcd. No city whatever makes fo proud a difplay at its approach as this wretched village, the popula- tion of which confifts of two or three thouiand fouls, who have taken up their abodes on the roofs and beneath the galleries of this temple, which has, neverthelefs, the air ot being in a manner uninhabited. Denon has particularly defcribed the tombs above-nien- tioned, in the village of Kurnu, the ancient Necropolis of Thebes ; and he concludes with remarking, that the myf- tery and magnificence obfervable within thefe excavations, and the number of flaves by which they aix' protcdled, in- dicate, that the religious worfliip which had fcooped out and decorated thefe grottoes, was the faivie as that which had raifed the pyramids; but our limits forbid a farther detail. THEBET, in Chronology. See Tebet. THEBIT Ben Corah, or Thabet Ebn Korra, in Biography, an Arabian teacher of philofophy and mathe- matics, was a native of Harran, and belonged to the feft of the Sabscans, and on this account was furnamed " Al- Sabi-Al-Harrani." The time in which he flourilhed is un- certain. Some fay that he was born in the 22lflyear of the Hegira, or A.D. 835 ; others refer him to the loth century ; and others again have placed him in the 1 2th or 13th century. He was fecretary to the caliph Mothaded; and was , diftinguilhed by his il.>•, a nipple, in allufion to the little glandular prominences which cover the calyx, apf>ears, by his de- fcription, to be the fame genus with the Linnasan Plum- B.tco. See that article. THELARY, in Geography, a town of Hindooftan,. in Bah.nr ; 1 8 miles S. W. of Bahar. THELBALANA, in jincient Geography, a town of Afia, in the Greater Armenia. Ptol. THELBENCANA, a town of Afia, in Babylonia, on an ai"m of the Euphrates. THELDA, a town of Afia, in Mefopotan^ia, on the banks of the Euphrates. Ptol. THELE, a word ufed by fome to exprefs the nipple, and by others for the whole breaft. THELEB0.(E, in u^ncient Geography, a people of Epirus, in Acarnania, vvho paffed into Italy, and efta- bliihed themfelves in the ifland of Caprea. THELEBOLUS, in Botany, from Or,x-n, a nipple, and ^a>,o:, a cajl, or throw, becaufe the little veficle, lodging the feeds, refembles a nipple, and is thrown off with a de- gree of elafticity. The name was originally written Thelta- bolus, but the above is juftly preferred Tode Mecklcnb. V. I. 41. Perf. Syn. 116. — Clafs and order, Cryptcgomia Fungi. Nat. Ord. Fungi angiocarpi. Eff. Ch. Receptacle cup-like, fomewhat globofe, en- tire at the edge, difcharging a papillary, nearly naked, feed-veffel, I. 'T\\. flercoretu. Small Nipple-fungus. Pe-l. n. I. Tode n. I. t. 7. f. 56. — Found by Tode on the dung of fwine, after rainy weather in June and July. He compares it to the roe of fi(h in appearance, and to poppy-feed nearly in fize. Tlie colour is a tawny yellow. Each in- dividual is globular, attached at the bottom by capillary roots, and crowned with a fmall papillary tubercle, of a THE more orange or golden liuc than the roll. This is at length thro-.va oft', with a ludclcn and llroiig claftic force, leaving a ir.inute, bordered, vilcid pit, or cup, wliich gradually dilates into a level furface. The minute fungus .ibove defcribed is clofely related to .Spii/h;Ronoi,u.s, and Hill more nearly perhaps to Pilobolus. ( See thoie articles. ) Wliether it might be allowable to com- prehend them under one genus, may admit of much difpute. Even the many-cleft riccplacle, or involucrum of Spharobolus can hardly be deemed a fufficient important difference to fupcrfede this mcafure, and Hill lei's the elongated figure, or pellucid fubftance, of Pilobolus. Botanifts who bellow their concentrated attention exclufively on particular tribes of plants, are prone to multiply dillinftions ; but they are not raftily to be corredted by thofe who have not looked fo clofelv, nor, perhaps, fo well. THELEDA, in Ancient Geos;rap!iy, a town of Afia, in Syria, fituated on a plain 'W. of Seriana, and E. of Cap pars. THELEPHORA, in Botany, from S.An, a nipple, and fitpi', to hear, becaufe of the generally papillary covering of the under furface. — Willd. Berol. 396. Perf. Syn. 565. Schrad. Spicil. 182. (Craterella; Perf. Obf. Mycol. v. i. 39. Corticium ; ib. 37.)— Clafs and order, Cryptogmma Fungi. Nat. Ord. Fungi gymnocarpi, Eff. Ch. Head coriaceous, dilated ; minutely papillary, briftly, or fmooth, beneath. An ample, and, in our opi- nion, rather vague genus of the fungus tribe, of which Perfoon reckons up forty -feven fpecies, ranged under three feftions, once confidered by him as diftinft genera. 'We fhall, after our ufual manner, feleft a few examples of each. SeSi. I. Craterella. Head undivided, hoHoiu or f:mnd-Jhaped above, luith eijkaggy dijh. Two fpecies. Th. pallida. Pale Thelephora. Perf. n. I. " Ic. et Defer. Fung. 3. t. I. f. 3, fub Cmterella." — " Aggre- fate, corky, pale. Head concave, Ihaggy with fcales." — Larely found on the ground in moid woods. The Jlalh is very fhort ; villous at the bafe. Head rough beneath, with little briftles, vifible under a magnifying glafs. Per- foon. Th. caryophyllea. Carnation Thelephora. Perf. n. 2. Albert, and Schwein. Nilk. 272. (Craterella ambigua ; Perf. Obf. Mycol. v. i. 39. t. 6, f. 8 — 10. Helvella caryophyllea; Schxff. Fung. v. 4. 115. t. 325. Dickf. Crypt, fafc. i. 20. Auricularia caryophyllea ; BuUiard. t. 278. 483. Sowerb. Fung. t. 213.) — Head funnel- fhaped, thin, purplifh -brown, fringed, varioufly jagged or crifped. — Found on the ground in fir woods. Mr. 'Wood- ivard firft met with this fpecies in Britain, near Bungay, Suffolk. Continental botanifts ufually fpcak of it as rare, but Mr. Sowerby fays it is " a very common parafite on the expofed fantaftic roots of old firs, in autumn." The fubftance is tough and fomewhat woody ; the colour a chocolate-brown. The plants often grow in maffes, at- tached by their upper fide to flicks, old bark, &c., and are from one to three inches in diameter. Sometimes the ^^ggy ^'^gs 's white. Perfoon in his Obf. Mycol. above quoted feems difpofed to think the prefcnt fungus may vary fo much as to become Ramaria palmata of Holmlkiold, Fung. Dan. v. i. 106. t. 33 ; but furely the multiplied divifions and ramifications of the latter, as well as its fmooth- nefs and colour, preclude fuch an idea. Seft, 2. Stekeum. Head halved, finally horizontal. Thirteen fpecies. Th. terrejiris. Ground Thelephora. Perf. n. 3. Ehrh. Crypt, n, 179. (Th. mefenteriformis j Willd. Berol. 397. THE t. 7. f. 15.) — Somewhat imbricated, dull brown. Head flattened, fliaggy with fibres. On fandy ground. This fcems to us a mere variety of the laft, or rather its moft ufual form, as reprefentcd in Mr. Sowerby's t. 213. Yet Perfoon cites this plate, with doubt, under his fourth fpe- cies, Th. laciniata. He ieems to lay too much ftrefs on the aUfence or prefence of a ftalk, and perhaps makes too many diftintlions. Th. rubiginofa. Rufty Thelephora. Perf. n. 6. (Th. fragilis; Eiirh. Crypt, n. 238. Helvella rubiginofa ; Dickf. Crypt, fafc. I. 20. Auricularia ferruginea ; BuUiard. t. 378. Sowerb. Fung. t. 26.) — Imbricated, rigid, rufty- brown, fmooth on both fides, with fcattered, rather larg.-, knobs. — Not uncommon On gate-pofts or pales, generally placed fo low as to be partly hid by the earth and neigh- bouring plants, as Mr. Sowerby remarks. It is very dif- tinft from the foregoing, foft like velvet to the touch ; the under fide bearing fcattered, roundifh prominences, which, however, do not appear concerned in the fruftification. The edge is ufually pale. No part is hairy or fhaggy. The diameter of each plant is about an inch. Th. ferruginea. Snuff-coloured Thelephora. Perf. n. 9. Albert, and Schwein. Nilk. 273. (Auricularia tabacina ; Sowerb. Fung. t. 25.) — Wavy, fomewhat reflexed, bright brown. Head thin, nearly even, flightly downy ; hairy underneath.' — Frequent on ftumps and rotten branches, in various fituations. The plants are feffile, attached by the back, projefting over each other, of an elegant undulated figure ; the colour of both fides a bright reddiffi-brown, efpecially the upper, elegantly contrafted with the light- yellow border. Th. hirfuta. Common Hairy Thelephora. Perf. n. 11. Willd. Berol. 397. Albert, and Schwein. Nilk. 274. (Th. pallida; Ehrh. Crypt, n. 169. Auricularia reflexa ; Bul- liard. t. 274. Sowerb Fung. t. 27.) — Aggregate, rounded, coriaceous, convex, fomewhat zoned, yellowilh; fhaggy above ; fjnooth and tawny beneath — Frequent on rotten ftumps, pofts, pales, tubs, &c. ; either growing fohtary, and roundifh, about an inch in diameter ; or in continued, confluent, fome- what imbricated maffes. The under fide is yellow or tawny ; the upper of a pale yellowiili-brown, marked with different concentric fhades, and rough with imbricated foft fliaggy hairs. The whole is often tinged with black, as if fmoked. It varies in fize as well as colour, and often confifts of an expanded orange-coloured furface, clofely preffed by its back to the wood, previous to its acquiring any projeftion by which the upper fide is expofed. In this ftate it might be referred to the next feftion. Auricularia papyrina, Bul- liard t. 402, feems nearly akin to tliie. Se£l. 3. Corticium. Plant laid entirely on its back, inde- terminate in form, papillary , various in fubftance- — Thirty-two fpecies, divided into fubordinate feftions, according to the colour, whether pale or dark red, yeDowifh, brown, grey, or white. — It is very neceffary to trace the progrefs of the fpecies of this divifion, in order to be certain they do not, at any period, acquire a diftinft upper furface, fo as to range under the preceding. Th. quercina. Oak Thelephora. Perf. n. 16. Albert, and Schwein. Niflt. 276. (Th. cai-nea ; Ehrh. Crypt, n. 269. (Auricularia corticalis ; BuUiard t. 436. f. I.) — Oblong, coriaceous, rugofe, pale ilefh-coloured ; the margin fomewhat involute, of a blackifh-brown at the back. — Found running longitudinally along decayed branches of oak. Each plant is two or three inches in length, fome- what oval, of a light flefh-coloured hue, with a powder)- or downy furface, which water will not moiften, and which is befprinklcd with round depreffed protuberances, obfcurely reprc» T H E T H E rcprefenting the (hields of a Lichen. Tlic margin foon be- comes elevated and indexed, efpecially by drought or cold, and difplays the blackifh under fide, which ought to be the upper. Th. cruenta. Blood-red Thelephora Perf. n.^4. — " Smooth, coriaceous, tuberculated, blood-red." — An ele- gant fpecies, found on the branches of trees, and communi- cated by Ludwig from Mifnia. Pcrfoon. Th. ftinguinfii. Gory Thelephora. Perf. n. 25. (Tre- mella cruenta ; Engl. Bot. t. 1800.) — " Widely fproading on the ground, fomewhat gelatinous, blood-coloured, fmooth." — "This Angular fpecies," fays Perfoon, "grows in the llreets of towns, about the walls of houfes, looking at a diftance like blood poured on the ground. By drying it becomes paler. Is it not rather to be referred to the order of jUga?" In this laft fuggeftion we readily concur. The whole is truly an expanded niafs of minute, uniform, gelatinous, pellucid granulations, with nothing of a coria- ceous or fungous texture, nor any other charafter of the prafent genus. Th. hydnouka. Awl-bearing Thelephora. Perf. n. 28. Albert, and Schwein. Niflc. 279. (Corticium hydnoideum ; Perf. Obf. Mycol. v. i. 15.) — Spreading, concealed, orange- yellow, bearing awl-(haped elongated prominences This fpreads under the feparated cuticle of decayed dry branches of beech, which it fometimes totally encircles, extending to the length of four or fix inches. Its great peculiarity confifts in the awl-diaped projeovov, or K|jf»»o7f.vo») was taken to procure male chil- dren, its fruit refembling a part of the male organs ; while Thelygonon, which, though otherwife the fame, bore no fuclv fruit, was fuppofed to caufe the produftion of females. The word therefore is compofed of GnXt/ , and v-yo-r, genera- tion, or offspring, Jv^'-"', a leaf, being underflood, a confirm- ation of which may be found under the 6th fpecies of our article Mercurialis, above-mentioned. If we may be allowed to play further upon this word, we fhould remark that Its own generation is truly anile. Yet hence arofe Bauhin's Mercurialis te/liculata. Jive mas, and fpicata, fire famina; appellations perverfely beftowed on the two fexes of our Mercurialis annua, as well as of perennis. How Linnasus came to transfer Thelygonum to the genus which now bears it, can no otherwife be accounted for, than from the fuppofed affinity of the plants to each other, and both having borne the name of Cynocrambe, or Dog's Cabbage ; a name retained by Gsertner, after Tournefort, and hable to no objeftion, except being compofed of one already efta- blifhed, which doubtlefs caufed Linnaeus to rejed it. The iinaginary affinity juft alluded to has apparently itamped a poifonous charafter on the herb before us, which, confider- ing its natural order, is probably undeferved. — Linn. Gen. 494. Schreb. 644. Willd. Sp. PI. v. 4. 420. Mart. Mill. Ditl. V. 4. ' Ait. Hort. Kew. v. 5. 285.' Sm. Prodr. Fl. Gra:c. Sibth. v. 2. 237. Juff. 405. Lamarck llluftr. t. 777. (Cynocrambe; Tourn. t. 4S5. Gaertn. t. 75.) — Clafs and order, Monoecia Polyandria. Nat. Ord. Scairidu; Linn. Urlicic, Juff. Gen. Ch. Male, Cal. Perianth of one leaf, turbinate, coloured, cloven half way down into two revolute fegments. Cor. none. Stam. Filaments numerous, from fix to twelve or T H E or more, capillaiy, prominent, as long as tlie calyx, anthers verfatile, luiear, llraight. Female, on the fame plant, Cal. Periantli minute, of two ercft, lanceolate, acute, lateral leaves, permanent. Cor. none. Pyi. Gerracn fuperior, globofe ; ilylo lateral, be- tween the calyx-leaves, tliread-fhaped, much longer than the germen ; lligma llmple, curved. Peric. none. Seed folitary, globofe, ieated on a callous annular receptacle, which falls off with it. Etr. Ch. Male, Calyx in two revolute fegments. Co- rolla none. iStamens .about twelve. Female, Calyx Lateral, of two leaves. Corolla none. Style one. Seed naked, on a deciduous annular receptacle. I. Th. Cynocramlie. Dog's Mercury. Linn. Sp. PI. 1411. WiUd. n. I. Ait. n. I. Sm. Fl. Gr^c. Sibth. t. 941, unpublidied. (Cyiiocrambe Diofcoridis ; Bauh. Prodr. 59. C. alfinefoha ; Barrel. Ic. t. 335. Alfines facie planta nova ; Column. Pliyt. 28. t. 30. ed. alt. 120. t. 36.) — The only known fpccies, found in wafte ground and the fiflures of rocks, efpecially in fliady or moift places, in the fouth of Europe, as well as in Afia, flowering at almofl all feafons. About Rome and Naples it is very frequent. Its feeds may have been brought, from time to time, into our curious botanic gai'dens, but the plant has no charms, nor any known quality, to render it a popular favourite. The root is annual, fimple, cylindrical, with many fibres below. Stems icveral, fpreading or prof- trate, a fpan long, leafy, fcarcely branched, round, vei-y fmooth and (hining, moftly purplirti. Leaves alternate, ftalked, each with an axillary tuft of fmaller ones, ovate, rather fucculent, an inch, or thereabouts, in length, of a bright fliinlng green, very fmooth on both fides ; roughirti at the edges. Footjlalks almofl; as long as the leaves, dilated at the bafe into an annular toothed Jllpula. Flotuers fmall, whitifli, from the bofoms of the upper leaves. The ealyx of the males is not unlike the corolla of a honey-fuckle in miniature. Seed purplifh -brown, furrowed, not much bigger than muftard-feed. The general afpeft of the plant evinces its affinity to Par'ietar'ia, though the Jloiuers in detail are extremely different Dr. Sibthorp's figure has but injlamens. We have ufually found more, and authors defcribe from twelve to nineteen. That this herb is the >tt.v»-<, or^u«v_^-x,^.iSv, of Diofcorides, there can fcarcely be a doubt. He defcribes it fufEciently well, and informs us that it was fometimes called Wild Male Mercury ; which renders the name of Thelygonum flill more unfuitable ; but Linnaeus did not always fearch deeply into fuch matters, though he will commonly be found quite as learned as mod of his critics or coiTeftors. Diofcorides fpeaks of the plant in queilion as a gentle purge. This probably caufed the Mercurialis to be taken with the fame intention, though at the peril of the patient's hfe, as we have already mentioned in its proper place ; where alfo it may be feen that fome of the eariier European botanifls took that very plant for the •'vm^-ii^Si,. THELYMITRA, from SnXv , female, and ^..r^a, a dia- dem, or ornament for the bead. This name of Forfter's, not one of the moii happy, alludes to the cap or hood, orna- mented with a pair of plumy tufts, and covering the imme- diate organs of fruaification Forfl. Gen. t. 49. Swartz Aft. Holm. 1800. 228. t, 3. f. L. Ejufd. in Schrad. Neues .Tourn. v. I. 56. t. I. f. L. Sm. Exot. Bot. v. 1. ct. Brown Prodr. Nov. Holl. v. i. 314. Willd. Sp. PI. v. 4. 79. Alt. Hort. Kew. V. y. 200.— Clafs and order, Gynandrla Monandria. Nat. Ord. Orchidea:. Gen. Ch. Cal. Perianth of three equal, ovato-lanceolate, coloured leaves, exadly refembling the petals. Cor. Petals T H E two, ovato-lanceolale, the fize of the calyx, and exaftly like it. Neftary a feffile lip, of the fhape, fize, and appearance, of tlie petals and calyx, without a fpur. Stam. Anther pa- rallel to the fligma, permanent, of two cells clofe together, attached to the central lobe of a three-cleft hooded append- age to the column ; " maffes of pollen powdery, pendulous by a thread from the gland of the fligma." Brown. Pifl. Germen inferior, obovate ; flyle fliort, united with the hood ; ftigma in front, obtufe. Perk. Capfule obovate, furrowed, with one cell and three valves. Seeds numerous, chaffy. Eff. Ch. Calyx-leaves coloured, the fize and figure of the petals and lip. Column encompalTed by a three-lobed hood. Anther parallel to the ftyle, permanent. I. Th. Forfleri. Forfter's Thelymitra. Swartz Aft. Hohn. 1800. 228. t. 3. f. L, c. Willd. n. I. (Th. longi- lolia ; Forfl. Gen. t. 49. Serapias regularis ; Forfl . Prodr. 59.) — Lateral fegments of the hood plumous : in- termediate one vaulted. Clufter many-flowered Ga- thered by Forfter in New Zeeland. The flem is above a foot high, round, ftriated, fomewhat fpiral, clothed with a few Iheatfiing lanceolate leaves. Clufter terminal, ereft, three inches long, of about a dozen upright_^owfrj, fcarcely half the fize of the next fpecies, each accompanied by an elliptic -lanoeolate zcute brciSea, longer than the partial ftalk. Of the colour of thefoiuers we have no information. Their f;ood appears, by the dried fpecimen, as well as Forfter's figure, to have its middle fegment vaulted, convex, and undivided. 3 Th. ixioides- Large-flowered Thelymitra. Swartz Aft. Holm. 1800. 228. t. 3. f. L, a, b, d— g. Willd. n. 2. Br. n. I. Ait. n. i. Sm. Exot. Bot. v. i. 55. t. 29 — Lateral fegments of the hood plumous : intermediate one three-cleft ; its lateral lobes jagged ; central one fhorteft, cloven, crefted at the back. Clufter many-flowered. — Found In the neighbourhood of Port Jackfon, New South Wales, from whence we received fpecimens and drawings about the year 1790. Mr. G-Caleyfentout plantsto Kew in i8lo,bul they do not appear to have fucceeded there. This is a larger talJer fpecies than the foregoing ; its fowers above an inch in diameter, very handfome, of a fine blue, fpotted, according to Mr. Brown, with a deeper colour. The Ixod is fringed with hairs, juft below the fummit, and overtopped by its two lateral, ftalked, plumous tufts. The calyx, petals, and lip, fprcad almoft equally in both thefe, and, we believe, ail the following fpecies, except our n. 9, Mr. Brown's venofa. 3. Th. media. Intermediate Thelymitra. Br. n. 2. — " Outer fegments of the hood plumous ; intermediate one naked at the back, three-cleft ; its central lobe emarginate, half the length of the others. Spike (or clufter?) many- flowered." — Gathered by Mr. Brown, near Port Jackfon. 4. Th. canalictdata. Channelled Thelymitra. Br. n. 3. — " Outer fegments of the hood plumous : intermediate one naked at the back, many-cleft ; lobes corrugated ; the outer one longeft and moft remote. Spike many-flowered." — Found by Mr. Brown, in the tropical part of New Holland. J. Th. paaciftora. Few-flowered Thelymitra. Br. n.4. — " Hood half the length of the petals : its outer fegments plumous : intermediate one naked at the back, emarginate, with rounded entire lobes. Spike of few flowers." — Ga- thered by Mr. Brown, near Port Jackfon. 6. Th. tiuda. Naked Thelymitra. Br. n. 5 — " Hood half tlie length of the petals ; its outer fegments plumous ; intei-mediatc one naked at the back, emarginate, with rounded entire lobes. Spike many-fiowered." — Gathered in the ifland of Van Dicmen, by Mr. Brown. By the above defi- nition, T H E nition, this fpecies differs from the laft only in having more numcrous^/^ow^'j-. 7. T\\. angujlifolia. Narrow-leaved Thelyttiitra. Br. n. 6. " Outer fegments of tlic liood phimous ; iiUermt'dlatc one naked at the hack, cmarginate, with toothed lobes. Spike of few flowers. Leaf as tall as the flowcr-dalk." — Found by Mr. Brown, in tlie neiglibourhood of Port Jackfon. 8. Th. carnea. Flefli -coloured Thelymitra. Br. n. 7. " Calyx and petals fpreading. Outer fegments of the hood finely toothed, beardlefs. Stalk with one or two flowers." Found by Mr. Brown, near Port Jackfon. A drawing in our pofTeflion, which feems to belong to this fpecies, reprefents the Jialh about four inches high, with a light-red terminal ^ow«-, above an inch wide, and a few fhort, radical, lanceolate leaves. 9. Th. -vemfa. Veiny Thelymitra. Br. n. 8.—" Calyx and petals converging. Outer fegments of the hood beard- lefs, fpirally involute." — Gathered alfo near Port Jackfon, by Mr. Brown. 10. Til. tigrina. Tiger-fpotted Thclymiira. Br. n. 9. «' Lateral fegments of the hood diftinft, with tufted beards ; intermediate one (hortcr, crefted. Leaves linear, channelled." Difcovered by Mr. Brown, on the fouth coaft of New Holland. ThQjlowcrs are yellow, with darker fpots. 1 1 . T\\. ftifco-liitea. Brownirti-yellow Thelymitra. Br. n. 10. — " Lateral fegments of the hood converging, connefted, fringed ; intermediate one erect, naked. Leaves lanceolate." — Gathered by Mr. Brown, in the fame country with the tigrina. He defcribes the yellow colour of the Jlowers as pe- cuhar to thefe two laft fpecies ; all the reft, as far as hitherto difcovered, having them generally blue, fometimes white, or flefli-coloured. We have neceflarily, for want of authentic fpecimcns, except of the firft two fpecies, adopted the fpe- cific charadlers of the excellent author whofe name we have cited. — He eftablifhes a genus under the name of Epiblema, whicli appears to differ from Thelymiira, in having a ftalked lip with tufts of fibres at its bafe ; an appendage to the bafe of the column, connefted with the claw of the lip under*, neath ; and the anther accompanied at each fide by a petal- like lobe. Of this there is only one fpecies, E ■ grandiflovuvi, found on the fouth coaft of New Holland. Its Jlowers are large, blue, and handfome. THELYPHONON, from driKvf, female, and ®ovo,-, murder, or deJlruBion, the name of an herb mentioned by Pliny, book 25, chap. 10, which he fays is by fome called Scorpion, from the refemblance of its root to afcorpion, and the touch of which is fatal to that animal, as a remedy for whofe fting it is given internally. He adds, that the fame root kills any fort of quadruped, if apphed to the parts of generation ; and that its leaf, which refembles that of Cyclamen, produces the fame effeft within the courfe of a day. His defcription soiwento the Doronleumfcorpioides, Wiild. Sp. PI.V.3.ZI 14; D . latifolium, Cluf. Hift. v. 2. 16; Great Leopard's-bane, Ger, Em. 759 ; but there is apparently much fuperftition, miftake, or exaggeration, intermixed in his relation. THELYPTERIS, h-omf^n-kvc, female, mA irli^i;, a fern, a name by which Pliny defignates a fpecies of the Fern tribe, whofe habit appears to be more delicate than that of his Filix mas,cT Male Fern. The latter fhould feem, by his defcription, to be our Pterts aquilina. (See Pteris. ) Tlie name of Filix mas, however, has remained with a large fpecies of Jifpidium, Sm. Fl. Brit. II2I. Engl. Bot. t. 1458; and that of Filix fcemina with a more flender and finely-divided one of the fame genus, Engl. Bot. t. 1459 : while a third, whofe texture is more thin and tender than either, has received the appellation of Affidium Thelypteris, They were all /rfcrred by I-innseus, under the fame fpecific names, to Vol. XXXV. THE PoiATOmuM. ( See tliat article. ) Owr ^rcknt Thelypteris, therefore, muft not be taken for that of Pliny, being rather a north-country plant, not hitherto noticed in Greece by any botanical traveller. THEMA, in Ancient Geography, a town of Syria, in the Chahbonitide territory ; and alfo of Arabia Deferta. THEM AN, a town of Arabia Petraea, 5 miles from Pe- tra, which had a Roman garrifon. — Alfo, a town of Judea, in the half-tribe of Manaifeh, on the other fide of Jordan ; famed foi- the wifdom of its inhabitants. EJiphaz, one of Job's three friends, came from this place. THEMAR, in Geography, a town of Germany, in the county of Henneberg, on the Werra ; 1 2 miles S.E. of Mei- nungen. THEME, Thema, a fubjeft or topic, upon which to write or compo/e. Theme, among AJlrologers, denotes tlic figure they con- ftruft when they draw the horofcopc ; reprefenting the ftatc of the heavens for a certain point, or moment, required ; i. e, the places of the ftars and planets for that moment. The celeflial theme confills of twelve triangles, inclofed within two fquares, and called the tivelve hotifes. Theme, in Grammar, denotes a verb, confidered in its primary and abfolute fenfe, and not limited to any particular mode or tenfe : or it is the verb in its primitive radical ftate, whence its different formations are derived. Theme, in Mufic ; Thcma, Lat. ; Tema, Ital. ; Moltivo, Sag- getto, is a feries of notes felefted as the text or fubjeft or a new compofition, or an old favourite and well-known air to grace and embelhfh with variations. About the middle of the laft century, the mufical world was overwhelmed with dull, unmeaning, and monotonous variations to old and new tunes, which confilled of nothing more than a regular multi- plication of notes, without fancy, talle, or harmonical re- fources ; till Haydn, in the flow and graceful middle move- ments of his quartets and fymphonies, by a richnefs of ima- gination, by double counterpoint, and inexhauftible refources of melody and harmony, rendered variations the moft inge- nious, pleafing, and heart-felt of his admirable produftions a grand orchejira ; and Mozart, in a totally different ftyle, and for a totally different purpofe, has rendered little favourite French, Itahan, German, and Enghfh airs the moft beauti- ful, amuiing, and ufeful compofitions for the piano forte that have ever been produced fince the invention of that inftru- ment. More than twenty of thefe have been printed in England that were brought from Vienna by Mrs. Peploe, who played them, as ftie did all other mufic, with a firmnefs, accuracy, and fpirit, which neither dilettante nor profeffor has ever exceeded. Thefe themes feem to have been a feries of leffons, com- pofed exprefsly to form the hand and tafte of fome difciple of the author, who promifed to be a great performer. In everyone of thefe themes, there are fome peculiar difficulties of execution, refinement, and expreffion to vanquifti, at which it is in vain for mediocrity to afpirc. THEMEDA, in Botany, a genus of graffes, fo called from its Arabic name Thicmcd. — Forfli. ^gypt-Arab. 178. Juff. 447 — It is found in Yemen, near Hadie. Forlkall names the only fpecies T. IriiinJra, and defcribes it as follows. X. " A polygamous grafs. Spilclels proceeding from a (heath, capitate ; the cuter ones whorled, male. Calyx of one valve, fingle-flowcred. Corolla of two valves. Styles and anvns wanting. In the middle of the head of flowers arifes a flwrt ftalk, bearing two ilalked male fpilrkts, and a feffile herma- phrodite one ; the calyx is of one valve, corolla of two ; atUK proceeding from the receptacle, much longer than the flower. 3 N Stemt THE THE Siems raeemofe. Shealis compreffcd, broad, fword-fliaped, concealing the branches, and the he:ids of Jlomers, before ex- panfion. All the heads are originally concealed in the (heath of a leaf." This can only be the Linnian jinthijlina, a genus which Mr. Brown, in his Prodr. Nov. HoU. v. i. 200, aflerts to have been firft defcribed by For(kall,bnt he gives no reference to the Themeda, which oraiflion has caufed us much trouble, and after all, leaves the matter in fome uncertainty. Des- fontaines, in his Fl.Atlant. v. 2. 380, has reformed the cha- rafter of y^«/Aj/?/na, and has given a figure, t. 254, oi yi. vlauca, called by fome authors Stipa paleacea, which agrees, as nearly as pofTible, with Forfkall's defcription. It does not appear that Vahl, Willdenow, or any other author, has advened loTkemcda, except Juffieu, who has merely admitted it, on FordoU's avithority, into his appendix, without exa- mination or elucidation. We prefume here to obfervc, that every correft writer ought invariably to cite the page of his author ; efpecially in referring to a confufcd pofthumous work, without an index, like that of Fordvall. THEMIS, in yinchnt Geography, a town of Africa Pro- pria, fituated between Tabraca and the river Bagradas. Themis, in Geography, a river of Tranfylvania, which runs into the Alaut, near Marienburg. Themis, in /IJlronoiny, a name given by fome to the third fateUite of Jupiter. Themis, in Mythology, the daughter of Coelumand Terra, or of Uranus and Titaia, the eldeft filler of Saturn, and aunt of Jupiter. Themis, according to Diodorus, eftablifhed divination, facrifices, the laws of religion, and every regulation that contributed to maintain order and peace among men. She alfo applied herfelf to aftrology, iffued prediftions, and after iier death temples were erefted to her, in which oracles were delivered. She had a temple on mount Parnanus, and an- ofher in the citadel of Athens. THEMISCYRA, in Jncunt Geography, a town of Afia Minoi", m the kingdom of Pontus, fituated in the open country to which it gave name, upon the banks of the river Thermodon, towards its mouth in the Euxine fea. Diodorus Siculus fays that it was a royal city of the Amazons, and that they founded it. THEMISONIUM, a town and country of Afia, in Phrygia. THEMISSUS, a town of Afia Minor, in Caria. THEMISTEAS, a promontory of Afia, in Carmania. THEMISTIUS, furnamed Eupkrades, or the fine fpeaker, in Biography, an Eclectic philofopher, was born in an obfcure vJlage of Paphlagonia, about the year 317, and having fixed his refidence at Conftantinople, taught eloquence and philofophy with great reputation and fuc- cefs. His difciples, both Pagan and Chriftian, were nu- merous ; to the former clafs belonged Libanius, and to the latter, Gregory Nazianzcn. By the emperors he was highly efteemed, and they conferred upon him diftinguifhed honours. In the year 355, Conftantius admitted him mto the fenate ; and in return for an eloquent eulof^ium, prefented him with a brazen ftatue. Julian correfponded with him as a friend ; and in 362, appointed him prasfedl of Conftantinople. His charafter and eloquence induced other emperors to beftow upon him peculiar favours. When Jovian iflued his edift of toleration, Themiftius was deputed by the fenate to exprefs its loyalty ; and on this occafion he expatiated with elegance and liberality on the rights of confcience, and the independence of the human nnind. Of his candour and liberality, the following me- 5 morable inftance is recorded by Socrates, Sozomeii, anni other ecclefiaRical hiftorians. The emperor Valens, who favoured the Arian party, treated the Trinitarians with great fevcrity. Tliemillius, difapproving the meafures which the emperor purfued, addreffed him in an eloquent fpeech, ftating that the diverfity of opinions among Chriftians was inconfiderable, comp.ired with that of the Pagan philofo- phers ; and urging upon his attention, that tnis diverfity could not be difpleafing to God, fince it did not prevent men from worfhipping him with true piety. By fuch arguments, Themiftius, it is faid, prevailed upon the em- peror to treat the Trinitarians with greater lenity. What an example does this Pagan philofopher exhibit even to Chriftian divines ! In the year 376 Themiftius vifitcd Rome, but though folicited to take up his abode there, he preferred returning to Conftantinople. It redounds very much to the honour of this philofopher, and alfo to the liberal fentiments of Theodofius the Great, that during his vifit tothe Weftern empire, the emperor entrufted Themiftius, notwithftandinjf difference of religion, with the care and education of his fon Arcadins. Themiftius was no lefs diftinguiftied by gentlenefs of temper and urbanity of manners, than by hi? eloquence and wifdom, and ability in the conduct of public affairs. After a long courfe of civil honours, he withdrew about the year 387, at an advanced age, from public bufi- nefs ; and foon after died. Themiftius, the fubjeft of this article, wlio does not appear to have ever deferted the Pa- gan fchools, ftiould be diftinguiftied from a Chriftian deacon of the fame name, who lived after the council of Chalcedon, held in the year 551, and who was the head of the fe£l called yfgnoels; which fee. As a philofopher, Themiftius illuftrated feveral of the works of Ariftotlc, particularly the Analytics, the Phyfics, and the book on the Soul, in com- mentaries, written with great perfpicuity and elegance. His "Orations," which were thirty-fix, and of which thirty- three are ftill remaining, are ftrongly marked with the fame chaTadlers. The beft editions of his Orations are thofe of Petau, Gr. and Lat. Paris, 410. 1618; and of Hardouin, Gr. and Lat. Paris, fol. 16S4. Fabr. Bib. Grsc. Biucker by Enfield. Gibbon. Lardner's Works, vol. viii. THEMISTOCLES, an Athenian ftatefman and com- mander, the fon of Neocles, a perfon of middle rank at Athens, At a very early age he manifefted, both in his amufements and in his literary purfuits, thofe views and in- clinations, which marked the charafter and deftiny of his maturer years. To thofe who ridiculed him on account of his apparent contempt of ornamental accompliftiments, he replied, " It is true, I never learned how to tune a harp, or play upon a lute ; but I know how to raife a fmall ftate to a great one." Ambition feems to have been his ruling paflion, and he loft no opportunity of acquiring military and politi- cal diftinftions. He fought popularity with a view to his perfonal advancement ; and lels pure and difinterefted tn his principles than Ariftides, his folicitude for the glory of his country was fubfervient to his own reputation and emi- nence. After the defeat of the Periian invafion by the battle of Marathon, an event which interefted his feelings and roufed into exercife his predominant love of glory, he forefaw that the attempt might be renewed by fea as well as by land ; and he therefore exerted his influence in rendering the Athe- nian ftate a naval power. With this view, he induced his countrymen to appropriate the revenue accruing from the filver mines to the equipment of a number of galleys ; and as he poffeffcd the chief authority at Athens, in confequenee of the baniftiment of Ariftides, he found no obftacle to the execution of his defign. In the courie of three years after tliis event, the hoilile preparations of Xerxes for an expedi- tion THEMISTOCLES. tion into Grwce to enforce the demand of fubjeftioii, fur- liillied Iwiii with a plea for urging the Grecian ftates to com- promife their mutual dlfTentions, and to unite in defending themfelves againft the invader. In the choice of a general, with whom the command fhould be intruded in this emer- _i(eucy, the Athenians favoured the claims of a democratical orator, named Epicydcs, who had fafcinated them by liis elo- quence ; but Themiftocles induced him to furrender his pre- tenfious to an office for which he was totally unqualified by a bribe, and thus fecured the appointment for liimfelf with- out a competitor. When news arrived tiiat the Perfian army, conreyed by a fleet, was approaching the (traits of Thermopylae, Themiftocles propofed that the Athenians ihould lit out th?ir galleys and fail to meet them ; but this counfel being rejefted, he took the command of their troops, and having joined the Lacedsmonians, marched towards Tempe. In the mean while, intelligence was received that the paflage of the ftraits had been forced, and tliat Boeotii had iubmitted to the invaders ; and upon this alarm the army returned without feeing the enemy. In thefe circumttauces of apprehended danger, the Athenians, according to their Ciiftomary praftice, had recourfe for counfel to tlie Delphic oracle. The anfwer, probably fuggefted by Themiftocles himfelf, was, that they (hould rely folely on their fleet. It was now propofed, that the city fliould be wholly abandoned to the Perhans, without any attempt for its defence ; that the women, children, and aged ftiould be removed to fonve place of fecurity ; and that all who were able to bear arms, ihould erabark on board the galleys, and watch the event. A decree was obtained, after much fruitlefs oppofition, to this purpofe ; and this was followed by another, which per- mitted all exiled citizens to return. Ariftides was one of this number, who nobly facrificing, in tlie moment of his counti-y's danger, all private animofities, concurred in all the fpirited meafures of his former rival. Eurybiades, a Spartan, to whom the command of the confederate fleet was affigned, and who was very unequal to the office, differed with Themiftocles as to the meafures pro- per to be purfued ; and behaved with an infolence, which, probably for the fake of the pubhc fervice, the latter did not think proper to refent. Eurybiades was pacified by the gentlenefs and felf-comiaand of Themiftocles, and convinced by his reafoning. Finding it prudent, however, to change the meafures which he originally contemplated, he employed a ftratagem to induce the Perfians to advance and make an attack. This was followed by the famous battle of Salamis, which took place in the year B.C. 480, and which termi- nated in the fignal defeat of the Periian navy. The viftory has been chiefly afcribed to the fl^ill and valour of Themif. tocles ; and having thus fucceeded, he advifed the confede- rates to fail immediately to the Hellefpont, in order to de- ilroy the bridge of boats by which the army of Xerxes had paffed over, and thus to intercept his communication with Afia ; but being overruled in this propofal, he difpatched a fecret meflenger to the Perfian king, with information that the Greeks intended to break his bridge, and advifing him to retreat immediately before the defign was executed. The policy of Themiftocles, as we may judge from this inftance, was not always uniform and confiftent ; and in another cafe, which remains to be mentioned, on the authority of Plu- tarch, it was iiiexcufably flagitious. When the combined Grecian fleet was wintering at Pegafa in Magnefia, he informed the Athenians, that be had conceived a projeft which would be of uifinite fervice to the repubhc, and at their defire, he would communicate it to Ariftides. This virtuous man told them, that the fcheme of Themiftocles iv.suld be highly advantageous, but that nothing could be more unjull ; upon which, very much to tlieir honour, they determiiud not to adopt it. The plan was to burn all tlie (hips of the fleet, except thofe of Athens, by which (he would remain complete miftrcfs of the fcas. The viftory at Salamais advanced the name and ch;iratter of Themiftocles to the higheft pitch of glory throughout Greece. On his vilit to Sparta, he was received with every token of refpeft ; and whilft the (irft prize of valour was decreed by the people to their countryman Eurybiades, the ohve wreath of fupcrior wifdom was placed on the head of the Athenian ; and tliey alfo prefented him with a magnifi- cent chariot, and ordered three hundred of their youth to attend him back to the borders. At the next Olympic games, the eyes of the whole alfembly were fixed upon The- miftocles, and he was jiointed out to ftrangers as the moft in- terefling obje£l at the fpeftacle. Themiftocles himfelf ac- knowledged, that this was the nobleft day of his life. When the conllitution of Athens was about to be re-eftabli(hcd, after the rebuilding of the city, Themiftocles, in conformity to the political principles whjch he had adopted, propofed that every citizen fliould have an equal right to participate in the government, and that the members (hould be chofen from the body of the people, witliout diftinftion ; and in his pro- pofals the people unanimoufly acquiefced. He alfo propofed to fortify the city ; but as the Lacedsemonians objefted to the propofal, he was deputed upon an embafTy to Sparta with a view of concihating them. He contrived, however, by various artifices, to prolong the negociation, fo that the Atlienians had conftru^ed their walls before the Spartans were duly apprized of the faft. Themiftocles vindicated this artifice by alleging, " that all things are lawful in ferv- ing our country ;" and the Spartans, admiring his patriotifm, filently acquiefced. In the following year, his fcheme for rendering the PyrKum the principal port of Athens, and conneftlng it with the city by long walls, was adopted and accomplirticd. Independently of the deceits which Themiftocles had praftifed with regard to the Lacedsemonians, another cir- cumllanee had occurred which increafed their enmity againft him. He had fucceisfuUy oppofed their fending deputies to the Amphiftyonic council, and thus degraded their au- thority in Greece. Incenfed againft him, they joined his rivals at Athens, and ufed all their influence to deftroy his reputation. His own conduft alfo had excited jealoufy and refentment ; for he had caufed to be erefted near his own houfe a temple to " Diana Ariftobule," or " of the beft counfel," thus intimating, that his counfels had been the beft for the Grecian community. His enemies prevailed, and procured his baniftiment from Athens by the fentence of Oftracifm. During his exile at Argos, his enemies gained an additional advantage .over him. Apprized of the trea- fonable dcfigns of Paufanias, the Spartan, againft the li- berty of Greece, he declined the difclofure of them ; and after the deteftion and death of Paufanias, letters of The- miftocles were found, which proved that they had conferred on this bufinefs. The Lacedimonians preferred an accufa- tion againft him to the Athenians ; and they called him to account in the prefence of the ftates of Greece. Dreading a trial, he fled to Corcyra, and thinking himfelf infecure there, he v^athdrew to Epirus : and at length was reduced to the neceffity of feeking the proteftion of Admetus, king of the Molofli, whom he had formerly offended. The ven- geance of the Spartans purfued him, and Admetus was threatened with a war, if he protefted the criminal. The king difmiffed him with money acrofs the continent to a port in the iEgcan fea, whence he reached Afia in fafety. In the year B.C. 462, he arrived at the Perfian court ; but here 3 N 2 his T H E Ilia naine was fo obnoxious, that a reward pf 200 taknts had been offered for apprehending; him. Here he appeared in difguife, and pretending that he had important informa- tion which he \vi(hed to communicate to the king in perfon, he was admitted to the royal prefence, and favourably re- ceived : the 200 talents, which were the price of his head, were paid to himfclf, and a more ample recompence was offered to him, if he would give iifcful information concern- ing Greece. He was granted time for acquiring the Perfian language, and after a year he appeared at court Tike a native. The king and royal family treated him with diftinftion ; and it is faid tliat tlie "revenues of three cities, -viz. Magnefia, Lampfacus, and Myus, were affigned him, under the name of bread, «ine and meat ; and as fome fay, two more, for lodging and wardrobes. In this ftatc of luxury and magni- ficence he was joined by the members of his family, who had been conveyed to hini by his friends, and to them he ex- preffed a kind of fatisfaftion with his condition, which proves that moral meannefs may accompany exalted talents. The clofe of his hfe is involved in obfcurity. Plutarch relates, that upon the revolt of Egypt, fupported by the Athenians, againll the Perfian dominion, the Greek king, rcfolving to fend an expedition into Greece, difpatched an order to Themiftocles at Magnefia, reminding him of his promifes, and claiming the fulfilment of them : upon which it is faid, that, in order to avoid the difgrace of bearing arms againft his country, after facrificing to the gods and taking folemn leave of his friends, he drank poifon, and died in that city at the age of fixty-five years. Thucydides, his contemporary, fays that he died of a diftemper ; and others again report, that he poifoned himfelf, becaufe it was not in his power to accomplilh what he had promifed. The Magnefians honoured his memory with a fumptuous tomb ; but his remains, according to his own orders, were privately conveyed to Attica, where they were interred. It is fur- ther faid, that the Athenians, repentinjj of their treatment of him, raifed a tomb for him in the Pyrsum, which was an interefting objeft to all who vifited that port. His An- gular talents, and the fervices which he rendered to his coun- tnr, mufl be acknowledged ; and thofe who think favourably of liira, afcribe his defertion of them to unjuft perfecution. But in Themiftocles we look in vain for the virtues of an Ariftides ; and he can only be allowed the honour of a dif- tinguifhed general and ftatefman. Thucydides. Plut. in Them. Ancient Un. Hift. THEMNA, TiMNA, or Thamnata, in Ancient Geogra- phy, a town of Paleftine, in the tribe of Dan. Jo(h. xix. 43. — Alfo, a town of Arabia Deferta, on the confines of Mefopotamia. THEN, in Geography, a river of France, which runs into the Weze, near Francremont. THENA, in Ancient Geography, an ancient town of Africa, fituated N.E. of the Tanais and near it, and two miles in circuit — Alio, a town of Samaria, in the vicinity of Sichem. THENAC, or Thanac, a royal town of Judaea, in the half-tribe of Manafleh, on this fide of Jordan. It \vas given to the Levites of this tribe, and its king was one of thofe who were vanquilhed and flain by Joftiua. THEN^, a town of the ifle of Crete, near Cnoffus. THENAR, in Anatomy. The eminence in the palm of the hand, formed by the mufcles of the thumb, has been called thenar : and fome of the mufcles have been defcribed under the fame name. The thenar of Riolan and Winflow includes the abduftor pollifis brevis, and the opponens pollicis. THENEATE el Gannim, the Sheep Cliffs, in Gcogra- T H E phy, mountains of Africa, in Sahara ; 90 miles S. of Al- giers. THENEZAY, a town of France, in the department of the Two Sevres ; 10 miles N.E. of Partenay. THENGEN, a town of Germany, which gives name to a principality, fituated in the Hegau, bordering on Schaff- haufen ; 8 miles N. of Schaffhaufen. THENON, a town of France, in the department of the Dordognc ; 6 miles miles N.W. of Montignac. THENONGOUN, a town of the Birman empire ; 4 miles S.W. of Ava. THENOPSYCHITES. See Thnetopsychitrs. THENSA, among the Romans, a veil or canopy, ufed in the chariots of games ; and likewife to cover a feat of ftate. Thenfas could not be granted to any but by the exprefs allowance of the fenate. Hift. Acad. Infcript. vol. i. P- 359- THEOBALD, Lewis, in Biography, a profeffed writer, was the fon of an eminent attorney at Sittingbourn, m the county of Kent, and is here noticed as one of the nu- merous editors of Shakfpeare. Of his various works, critical, poetical, and dramatic, it is needlefs to give any account, as they have funk into oblivion. He had the misfortune of becoming, to an undue degree, the objeft of Mr. Pope's contempt and fatire, and of having the firft place affigned him in the Dunciad, though he was afterwards fuperfeded by Gibber. His edition of Shakfpeare was preceded hy a work entitled " Shakfpeare reftored," andpublilhed in 1726; and alfo by that of Mr. Pope. It is thus characfterized by Dr. Johnfon : " Pope was fucceeded by Theobald, a man of narrow eomprehenfion and fmall acquifitions, with no native and intrinfic fplendour of genius, with little of the artificial light of learning, but zealous for minute accu- racy, and not negligent in purfuing it. He collated the ancient copies, and reftified many errors. A man fo anxioudy fcrupulous might have been expefted to do more; for what little he did was commonly right." Of the tragedy which he brought on the ftage, and which is entitled " The Double Falfehood," the greater part is afcribed by him to Shakfpeare ; but Dr. Farmer has proved that this is a miftake. THEOBROMA, in Botany, the Chocolate-tree, received that name from Linnaeus, who probably, hke the prefident Bachot, cited by De Theis, was fond of the delicious pro- duce of this tree ; for the word is formed of Sio;, a god, and ^fajM, food. A French writer, M. Tuflac, in his magnificent Flore des AntiUes, has objefted to the above generic name, for a reafon which we confefs to have been one of the laft we fliould have thought of ; that " it carries with it the fignification of a quahty, and feems therefore more fit for the name of a fpecies." Surely nothing can be more defirable than a generic appellation which conveys information ; on which account Amaranthus, Artocarpus, Biferrula, are excellent ; we need not run through the bota- nical alphabet in fearch of numerous others. Such probably was the origin of moft names, in every language, and who can tell that the American word Cacao, fubftituted, or rather reftored, by Tuffac, may not exprefs fome quality of the plant ? Neither is it an objeftion to any fignificative gene- ric names, that they exprefs merely fome general property or peculiarity, not found in every one of the fpecies, witnefs Urtica. The idea of ftinging is aflbeiated with the name of a Nettle ; hke rednefs with that of a Rofe ; though there are Dead Nettles, and White Rofes. — Linn. Gen. 391, with an erroneous defcription, correfted in Linn, Suppl. 341. Schreb. J13. Willd. Sp. PI. v. 3. 1422. Mart. Mill. THE Mill. Dia. V. 4. Ait. Hort. Kew. t. 4. 408. Jiiff. 276. Lamarck Illullr. t. 635. ( Cacao ; Tourn. t. 444. Gaertn. t. 122.) — Clafs and order, Polyadelphia Decandrla. Nat. Ord. Colummferit,\Ani\. ■ Malvacea, JufT. Gen. Ch. Ciil. Perianth inferior, of five ovato-lanceolatc, acute, fpreading, coloured, deciduous leaves. Cor. Petals live, rather longer than the calyx ; their clawB dilated, con- cave, hooded, marked internally with two ribs from the bafe, aiid one from the fummit : their borders roundidi-OTate, pointed, fprcading, each contrafted at the bafe into a narrow, ereCl and recurved flalk, connefted with the claw. Nei^ary ihort, cup-fliaped, crowned with five long, ereft, awl- Ihaped, pointed, equal, converging fegments. Stam. Fila- ments five, thread-fliapcd, ereft, recurved at the upper part, concealed in the hollow claws of the petals, inferted into the outfide of the neftary between its fegments, but not above half fo long ; anthers two to each filament, (one on each fide, at the fummit,) vertical, two-lobed, one lobe over the other. Pyi. Germen fuperior, nearly feffile, ovate, with five furrows; llylc cylindrical; fligma in five awl-lhaped fegments. Peru. Berry elliptic-oblong, beaked, coated, of one cell. Seeds large, ovate, fmooth, numerous, in five rows : their cotyledons in many deep lobes. EIT. Ch. Calyx of five leaves. Petals five, vaulted at the bafe. Neftary cup-fliaped, with five taper points. An- thers two to each filament. Stigma five-cleft. Berry coated. Seeds ovate. Obf. Gxrtner obferves that he could find no traces of the five cells attributed by authors to this fruit. It is pro- bable, however, from analogy, that they may exifl in the germen, and Aublet's account is fufHciently explicit of their prefence in the fruit. The drawing in the Linnafan herba- rium, which appears to have been fent by AUamand from the Weft Indies, has led us to fuppofe each filament bore four anthers ; but it feems there are only two, each of two round, diftindl, vertical lobes, as reprefented by Aublet, t. 275, and copied by Lamarck. The order of Decandria muft therefore be reflored in the clafs Polyadelphia. See Sm. Intr. to Bot. ed. 3. 340. Linna:us's cliaraiSers of Tlieobroma in Gen. PI. were taken chiefly from Plumier's Guazuma, the Bubroma of Schreb. Gen. 513; fee that article. He has left a more correft defcription in manu- fcript, from which perhaps his fon corapofed what is given in the Supplementum. From thefe fources, with the help of Allamand's drawing, and what is to be found in Aublet and Schreber, we have drawn up our account, having no oppor- tunity of examining a flower. I. Th. Cacao. Smooth-leaved Chocolate-tree. Linn. Sp. PI. 1 100. Suppl. 341. Willd. n. I. Ait. n. \. (Th. n. 2 and 3 ; Browne Jam. 306. Cacao ; Merian. Surin. t. 26 and 63. C. Theobroma ; Tuflac Flore des Antilles, t. 13. Arbor cacavifera americana ; Pluk. Almag. 40. Phyt. t. 268. f. 3.) — Leaves entire, fmooth on both fides. — Native of South America. Miller appears to have had this plant alive at Chelfea, but it has never long fucceeded in our ftoves ; being extremely tender, even in fome parts of the Weft Indies. Browne fays the Chocolate-trees, though naturalized in the woods of Jamaica, are very delicate, and rarely furvive when once they are loofened in the ground by hurricanes. (See Chocolate. ) Thefe trees are the fize of a middling apple-tree, but feldom exceed fix or feven inches in diameter. They are very beautiful, efpecially when laden with fruit, which is difperfed, on ftiort ftalks, over the Jlem, and round principal branches ; its yellow hue and warty furface fomewhat refembling a citron. The leaves are alternate, ftalked, drooping, a foot long, and three inches broad, elliptic -oblong, pointed, entire, flightly wavy. THE very fmooth on both fides, with one mid-rib, and many tranfvcrfc ones, connefted by innumerable, minute, re- ticulated veins. Foo//?a//f/ round, hairy, an inch long. 5/i- pulas minute, deciduous. Flowers fmall, feveral together in tufts, at the fides of the branches, on fimple ftalks, only one in each tuft, commonly producing fruit. Calyx light rofe-colourcd. Petals yellow. 2. Th. guianenjls. Downy-leaved Chocolate-tree. Willd. n. I. Ait. n. I. (Cacao guianenfis ; Aubl. Guian. v. 2. 683. t. 275.) — Leaves wavy, and fomewhat toothed; downy beneath Native of marftiy woods in Guiana, bear- ing flowers and fruit in September. Of rather more himible growth than the foregoing. The leaves are, at moft, but eight inches in length, and three in breadth ; their margin wavy, or rather bordered with fiiallow teeth, towards the extremity ; their upper furfacc fmooth and green ; the under clothed with fhort, a(h-coloured, or rufty pubefcence, and reticulated with fine veins. Footjlalks ftiort, channelled, downy. Flowers fituated like the former. Calyx green without, yellow within. Petals yellowifti. Fruit elliptical, with five angles, and clothed with ftiort rufty down. Aublet fays it has five cells, feparated by membranous partitions ; the feeds enveloped in a gelatinous, white, melting fubftance ; their kernel white, very good eating when frefti. He fpeaks of this fpecies as the Chocolate of Guiana, though he men- tions a Cacao fativa, with entire leares, as a cultivated kind, under which he cites Theobroma Cacao of Linnseus, and its acknowledged fynonyms. Aublet has alfo a Cacao fylveflris, v. 2. 687. t. 276, with entire leaves, downy beneath, and a downy fruit, without ribs. WiUdenow aflerts, we know not on what authority, that this laft is Duroia Eriopila, Linn. Suppl. 209, of which we, unfortunately, have met with no fpecimen. A branch of Aublet's plant, communicated from his own herbarium by fir Jofeph Banks, appears a variety of the laft, its leavet being obfcurely toothed in a fimilar manner ; but for want of j?owfrj we cannot fay how far it anfwers to Duroia, be- tween which and Theobroma there is no affinity in that refpeft. Aublet clearly defcribes his as a Theobroma, and we cannot help fufpefting fome error in WiUdenow, as well as, pof- fibly, a difagreement between Aublet's figure and our above- mentioned fpecimen, which latter may be, as above hinted, his Cacao guianenfis. At any rate, the two fpecies of Theo- broma which we have defcribed, are certainly and perma- nently diilinft. Theobroma, in Gardening, contains a plant of the exotic tree kind, of which the fpecies ufually cultivated is the cho- colate nut-tree (T. cacao). In its natural ftate, this tree produces a nut or fruit which is fmooth, of a yellow, red, or of both colours, about three inches in diameter : it has a fleftiy rind, near half an inch in thicknefs, which is flefh-coloured within : the pulp being whitifti, of the confiftence of butter, feparating from the rind in a ftate of ripenefs, and adhering to it only by filaments, which penetrate it, and reach to the feeds. Hence it is known when the feeds are ripe by the rattling of the capfule when it is ftiaken : the pulp has a fweet and not un- pleafant tafte, with a flight acidity ; it is fucked and eaten raw by the natives; it may be eafily feparated into as many parts as there are feeds, to which it adheres ftrongly, and they are wrapped up in it, fo that each feed feems to have its own proper pulp : the feeds are about twenty-five in number : when frefh, they are of a fiefli-colour : gathered before they are ripe, they preferve them in fugar, and thus they are very grateful to the palate : they quickly lofe their power of vegetation, if taken out of the capfule, but kept in it, they preferve that power for a long time ; the tree 4 bears T II E but De- • three tears leaves, flowers, and fruit all the year througJi ; tlie ufual feafons for gatiicriiig the Iruit are June aiid cember : in two years from the feed, the tree is abov. feet hiffh, and foreads its branches, not more than hve ot which are fulfered to remain. Before its third year is com- plete, it niews for fruit ; a tree yields from two to three pounds of feed annuaUy. Such Uecs are of courfe Tery produftive. r , , 3 r Mithodof CwAun-.— Itisincreafedby feed obtained from abroad, fowing it as foon after its arrival as poflible, in pots idled witli liglit eartli, and plunging them m a bark-bed, where they will foon come up ; and when the plants are about three inches high, potting them off feparately, and replunging them in the bark-bed in the ftove, managing them as other woody exotics of the Hove kind afterwards. Tliey afford an agreeable variety in ftove collections. Tliis tree is cultivated to confiderablc extent, and with very great attention in its native fituations in the hot parts of America, for the fake of its fruit, the kernels of which are much ufed in the making of chocolate there, as well as in this country. In this intention, they are firft brought to a pulverixable ftate by drying or roafting in a proper appara- ratus ; they are then reduced into a fine powder by mills or other contrivances : after which, this fine powder is wrought up into a pafte with orange-water, milk, and other liquids THE abolilhed the royalty, and declared Jupiter the only king of the people at Athens. THEOCRITUS, in Biography, a Greek poet, efteemed as the model of paftoral poetry, was a native of Syracufe, and the fon of Praxagoras and Philina. The tinw in which he flourifhed is afcertained by two of his poems, one ad- dreffed to Hiero, king of Syracufe, who begau liis reign about the year B.C. 265, and the other to Ptolemy Phi- iadelphus, whofe reign comprehended the interval be- tween 281 and 246 B.C. Although Hiero is reported to hare been a patron of literature, perfons of rank, as we may infer from. Theocritu^'s poem, did not f^>l- low his example, at leafl in granting encouragement to poets ; and therefore Theocritus left Sicily, and vifited the court of Ptolemy Philadelphus at Alexandria, on whom he pronounces a fplendid eulogy. The compofitions of this poet are denominated " Idylls ;" they are written in the Doric or ruftic dialeft, and few of them are paftorals, thouj^h moil of them relate to rural life and manners. The purely paftoral are diftinguiilied by the truth and fimplicity of the manners, defcending fometimes even to coarfenefs, and the pleafing defcription of natural objedls, drawn from the life. To thofe who have a tafte for genuine fimplicity, and the beauties of nature, fays one of his biographers, the poetry of Theocritus is highly agreeable. The moil cho, Lugd. Bat. 8vo. 1779-, Suidas. VolTius. Biog. THEODOLITE, or Theodolet, is an inftrument ufed for meafuiing horizontal and vertical angles in land- fuxveying. This mftrument was at firft made on a fmall portable fcale, fupported by a tripod that will fhut up into the form of a walkiug-ftick, when tlie inechanifm of brafs- work is difmounted : and the ftate of dividing circles is now brought to that perfeftion in England, that fmall po!"- table theodolites are ftill in ufe among land-furveyors, who confine themfclves to the planning of fingle eftates, for which thefe inftruments are competent ; but for furveys on a large fcale, fuch as county furveys, or trigonometrical raeafureraent of diftant ftations, theodolites of an enlarged conftru&ion have been ufed with correiponding advantage. Out of the numerous modifications of this inftrument, that different artifts have contrived, we propofe to leleft two for particular defcription, which are generally confidered as the beft for accurate furveys ; one by Ramfden, and the other by Troughton. We will begin with that large in- fl:rument already referred to in a former article, which was made by Ramfden, in the year 1777, for the ufe of general Roy, when he undertook his grand trigonometrical opera- tions, and which is defcribed in the 80th vol. of the Phi- lofophical Tranfaftions of London (1790), with all the conftituent parts given feparate in four large plates. A Cmilar inftrument, by the fame maker, has fince been ufed for the grand general furvey of the different coun- ties, by MeiTrs. Mud^e and Dalby. Plate VIU. fg. i. of Surveying, ftiews the perfpeilive view of this mafter- piece of workmanthip, nearly as reprefented in geoe- ral Roy's third plate ; but his account, having reference to the feveral plates, will not anfwer our purpofe. The ftand on which the inftrument is placed for ufe, is a foxir- legged mahogany ftool ABC, braced as fecn in the figure, with an oftagonal top perforated at the centre by a hole of nine inches diameter. This ftool or ftand, when ufed, while the fons of Codrus were difputing the fucceiCon, the has its feet fcrewed faft to the tops of four piles driven into Athenians, wearied out with the miferieB of an intcftine war, the ground, and nicely levelled, befoje the inftrument is plajccd exportation and fale in the European and other markets, if prepared in the places of its native growth. It is employed fomewhat in the manner of coffee as a fine rich breakfaft article of diet, and ufed pretty extenfively for that purpofe in this and fome other countries. THEOCATAGNOSTiE, formed from ©eo?, Ged, and xMTayim(rKw, I judge, or condemn, a feft of heretics, or rather of blafpheraers, who prefumed to find fault with cer- tain words and aftions of God, and to blame many things in the Scriptures. Marftial, in hit Tables, places thefe heretics in the feventh centmy ; for what reafon we know not. Damafcenus is the only author that mentions them, but without taking any notice of the time of their appearance. THEOCRACY, formed from @io; God, and xjaxo;, pov-'er, empire, a ftate governed by the immediate direftion of God alone. According to Jofephus, the ancient government of the Jews was theocratic ; God himfelf ordering and directing every thing belonging to the fovereign authority. By the oracle of Jehovah himfelf, all laws were enadled, war was proclaimed, and magiftrates were appointed ; in which three particulars the Jumma potejlas, or fovereign au- thority, of any ftate, confifts. And as Jehovah was the king, as well as the God of Ifrael, the priefts and Levites, who were the ftated attendants on his prefence, and to whom the execution of the law in many cafes was committed, were properly minifters of ftate and of civil government, as well as of rehgion. The facrifices alfo, befide their religious ufe, were intended for the fupport of the ftate, and civil government. This theocracy lafted till the time of Saul ; when the Ifraelites, weary of it, dcfired they might have a king like other nations ; and theace forward the ftate became monarchic. There was alfo a kind of imaginary theocracy at Athens THEODOLITK. ^iaccil on it, aiul one of tiic four fafteiiing fircws may be feen at B, at the jiinAion of the bracinj^ bars. Upon this llool another, but larger, oftagonal board of mahogany, U E, r' lU, whicli has a ring or circular curb on its plane, about half an inch from tiie fides of the odagon : tliis upper octagonal board may be fixed to, or rcleafed from, the top of the Hand by four vertical fcrcws, wliich penetrate both boards, but which allow one to flide over the other, fo as to he either concentric or excentric, as the adjullmont of a plumb-line to the mark, or hole under the inilrument may require, for the exaft place of the Itation, over wliich the centre of the iuflrument mult be exaftly fixed. Tlie four horizontal fcrews of adjullment, of which three are feen at F, F, and V, carried by the board D E, are fo contrived as to effeft this adjuftment by prefTnre againft the edge of the (land, after whicli the two otlagonal boards are made fad logetlier by the faid four verticil! fcrews not fhewn. The upper odta- gonal D E has an open conical focket of brafs, three inches in diameter, in its centre. Next above the board D E, thus adjufted and fccurcd, comes the third board, which is cir- cular, and which forms the bafis of the inilrument. In the centre of this bafe another brafs conical focket, three inches and a quarter in diameter, is made faft, and flips over the fmaller conical focket of the board D E of adjuftment for central pofition, fo that the centre of the inilrument being concentric with this board partakes of the adjuftment, while the plumb-line defcends through both fockets down towai-ds the ground. The large mahogany circle G H, of more than three feet in diameter, is uipportcd by feveral pillars connefted with the circular board, which we have called the bafe of the inilrument, and forms with tliem a haluftrade, that proteftslhe inilrument, as feen in the figure. A brafs circle of three feet diameter, within the haluf- trade, is attached by ten ftrong conical radii to the hu'ge vertical hollow axis, formed into the fruftum of a cone, of twenty-four inches in height above the metallic v/hcel, which we fhaU in future denominate the graduated circle, when confidered with its radii and hollow axis attached to it. This axis, by way of diftinftion, may be called the exterior axis ; it has a collar of eaft-lteel driven faft into the cavity of its inferior or thicker end, and a plate of bell-metal, with a lloping edge, kirmounts the fuperior end, which plate may be raifed or lowered by means of five fcrews afting verti- cally. The inftrument ftands on three fliort feet near D and E, and at an equidiftant point not feen behind, which feet are firmly united together, at the place where they branch off, by a circular ftrong plate of bell-metal, upon which is carried an attached vertical cone of metal fmaller than the former one, and as it fills the cavity of the other, we will call it the interior conical axis ; the exterior one being moveable round the interior one without the leaft perceptible liberty, beyond wliat is neceflary for rotatory motion. On the vertex of this interior axis is inferted a caft-fteel pivot with floping cheeks, which, entering the central hole of the bell- metal plate, exaftly fits its cheeks there, while the bell- metal bafe of the interior axis fits the caft^-fteel collar in- lerted into the lower extremity of the exterior conical axis. This mode of centering allows the wheel to be taken off and put on without injury, and is alfo free from the objedlion that applies to thofe large inllruments that have the fuperior end of the vertical axis fupported in a frame that is liable to alter in its dimenfions by expofure to the fun ; of which imperfeftion, as we have noticed in our article Circle, Piazzi had great reafon to complain. Befides, this kind of centre -work allows of carriage from one place to another, without any danger of injury being done to the inftrument when properly packed. There are two achro- matic tclefcopes with double objcft-glalicsof each thirty-fi>; inches focus, with eye-pieces of different powers both for ere6t and inverted pofitions. One of thcfe telefcope» lies acrofs the body of the inftrument, with the ends feen be- tween the oppofitc pillars of the baluftrade, the ufe of which is to watch the pofition of the inftrument during the time of an oblervation being made ; and, therefore, it requires but little elevation in altitude : the other is mounted, cxaftly like a tranfit-inftrument, over the top of the ex- terior vertical axis, and has a lemi-circle attached to the extreme end of its horizontal axis of motion, of fix inches radius, and graduated for ftiewing angles of altitude or of deprcflion. The Y's in which the pivots of the upper telefcope move, are fupported by the horizontal bar I K, which is braced by the ladder-pieces attached to the thick part of the exterior conical axis, and made faft to the top of this axis by its focket, as feen in the fedlion in Ji^. 4 ; which feftion exhibits moreover the internal fittings of both the internal and external axes at their fuperior ends. This tipper telefcope has a fpirit- level witli tlie ufual adjuftments at the Y's, and at the bar of fufpenfion for the horizontal pofition ; and, as it will reverfe in the Y's, and has moveable wires in the focus of the eye-piece, it may alfo be adjufted by a horizontal mark for colhmation, and for taking cxaci altitudes, (as well as for taking minute angles of elevation withoat the femi-circle by the motion of the micrometrical wires,) when the level is applied to a rod on the Jicic of the tube, as is the cafe in our drawing. When thefe adjuftments are made, by dividing the errors between the proper fcrews, as ufual, the level is hung to the crofs-bar I K to watch its pofition while this telefcope is ufed, aud when both tclefcopes con- tinue to bifeft the fame diilant mark during an obfervation, with the bubble of the level in the middle, it is a proof that the inftrument keeps its pofition. When a ftar or other objetl is viewed by night, the illuminating lamp K throws light into the axis of the telefcope, which has a dia- gonal perforated refledlor, as is ufual in tranfit tclefcopes. A fyftem of darkening prifms is alfo applied to the fame end of the axis to regulate the quantity of light that ftiall come to the eye. All thefe adjuftments and appendages have been minutely explained under our articles Cikcle and TRAHSlT-Iii/lruiTKnt, and therefore need not be detailed in this article ; but it may be proper to obferve, tliat the femi-circle has a moveable clamping-piece, bearing the fteel arbor of a vertical fcrew, the lower end of which falls on a poliftied piece of fteel on the plane of the horizontal bar I K, the ufe of which clamp and fcrew is n >t only to give a flow motion in altitude, but to allow the preponderating eye-end of the telefcope to reft fteady thereon, while the obfervation has been read and repeated. The obfervation in altitude is read by the compound microfcope at I, which is nine inches long, and which, by means of its micrometricafl fcrew, reads the divifions of the femi-circle to the accuracy of 5", when an allowance of iz" is made for excentricity. When this theodolite was firft brought into ufe, it was found that the fcrew L, with an ivory thumb-piece, moved the circle in azimuth by jerks, on which account the appa- ratus for (low motion, feen in Jig. 2, was fubftituted, in which two crown-wheels and a Hooke's joint are in- troduced to give motion to the tangent-fcrew ; which addi- tion not only remedied the jerks, but allowed the obfervcr to reach the handle while his eye remained at th ■ upper tele- fcope. The large brafs horizontal circle is divided into quarters of a degree, and the fubdivifioiis are made by the vertical micrometrical microfcope.i, the divided heads of which read exaft fecon^s, when properly adjufted for zero, for THEODOLITE. for diftinft vifion, and for power. The fcrew of tlie ver- tical micrometers has feventy-two threads in tJie inch, and the notches that indicate the fifteen minutes on tlie micro- metrical fcale of fteel, are formed by this fcrew, which we mention particularly, becaufe this mode of reading was pro- bably an original mode, though now become commou- Thefe vertical microfcopes, G and H, have each a ftage, reprefentcd by Plate IX. /^. 4 ; and a dot made on a thin flip of gold, C3\\tA 2i gold tongue, lies under the objeft-lens in fuch a fituation, that the capflan fcrews can adjull it to a given place in the field of view of each microfcope, fo as to become a mark for making the adjuftments by, and for bifeding the circle at reverfed oppoiite readings. The pofition of the three glaffes of each microfcope is feen in Jig. 3. of the fame plate, together with the magnified appearance of the notched fcale and divifions of the circle. In Jig. 5. the general plan of the micrometer is exhibited, and in Jig. 6. is the plan of the ftage where the pillars enter, that fupport the microfcope. Fig. 7. (hews the lower or fteel Aide, and fg. 8. the upper or brafs Aide, that feparate the wires of the micrometer ; while^^. 9. is a reprefentation of the long horizontal micro- fcope that reads the divifions of the femi-circle above noticed, at the letter I in the large figure of Plate VIII. As it was not eafy to defcribe the conftruAion of the three feet, two of which, we have faid, only are vifible, oppofite to D and E, we have added ^^j. 3. and 5. in Plate VIII. to illuftrate their pofition. In Jg. 3. the piece F F, as before, is a portion of the ftand, and D E a portion of the oftagonal board, to which the fcrew F is attached, that prefles againft the angulai- corner of the ftand, into which a piece of brafs is let for the fcrew to prefs againft, an end fettion of which is fhewn in_^^. j, with the fame letters of reference to the fame parts : M N is a feclion of the bafe of the inftrument, and O one of the thi-ee brafs branches that bears the foot-fcrew P, and its two fide fcrews or tight- ening fcrews Q, R, as feen in Jig. 5. At S is a curved piece of box, faft to M N, which bears the principal part of the weight laid on this fcrew, and does not gall the parts on which it Aides, when a circular motion is given ; but, to take off a part of the weight, a cylindrical roller near S is put to a horizontal fpring bearing the central pin of the rol- ler, which fpring prefTes the roller even with the face of the curved block of box, and may be made to take more or lefs of the weight by a fcrew preffing upon it from above, and giving it more or lefs tenfion. Hence all the parts of this large inftrument are ftrong, and yet the moving parts are made to go freely and fmoothly ; and the only alteration that can appa- rently be made for the better, is the addition of a third vertical microfcope, for which the conftm Aion is peculiarly adapted ; for each branch of the triple bar that carries the three feet, being braced firmly, is made as though each was intended to have a microfcope over it, which is the cafe with only one ; and an additional foundation for the fecond ftage is made to receive the fecond microfcope, as we think, unne- ceffarily ; for if three equidiftant microfcopes had been ufed inftead of two oppofite ones, not only would the errors of divlfion and of eccentricity have been leflened thereby, but in the reverfed pofition new parts of the circle would have been pointed to, equidiftant from the former three, fo that fix portions of the circle would thus have been employed in meafuring a reverfed obfervation, which the prefent aftronomer royal firft pointed out to be an ad- VMtage pecuhar to three readings on a horizontal circle. We have been informed, that it is yet intended to have thi-ee microfcopes attached to the horizontal circle of this large inftrument, to be ufed as we have here fuggefted. For the advantage of a triple reading, fee our table for tlu-ee veniiers in the article ClRCj-E. After having given a defcription of Ramfden's great theodolite, we proceed, in the next place, to explain how its different adjuftments are made, for putting it into a ftate proper for ufe, which we cannot do better, tlian by adopt- ing the dircftions laid down by general Roy himfelf. The AdjuJlmenl oj the Axis Level. — The axis of the upper or tranfit telefcope, being brought over any one of the feet, and the circle being clamped, hang the axis level on the pivots, or anfx of the telefcope, and bring the bubble to the two indices ; then reverfe the level, that is, turn it end for end, and note the difference. BifeA this difference, one half by the level's adjufting fcrew, and the other half by that foot-fcrew only which is in a line with the axis. This operation being repeated until the difference wholly vanifties, the level will be truly adjufted, that is to fay, the bubble will reft between the fame points in both pofitions. Adjujlment oJ the Eleniation Level. — This level being fuf- pended on the rod attached to the outfide of the tranfit telefcope, fcrew the ereft eye-tube on, to make that end preponderate. Adjuft the bubble to the indices by the fteel finger-fcrew at the tail of the femi-circle's clamp, reverfe the level, and note the difference. Then bifect that difference, and correft one half by the finger- fcrew, and the other half by the proper adjufting fcrew under the level, and fo on, repeatedly, until the difference wholly vanifties. The level may then be hung on the two pins that projeft from the horizontal bar which carries the telefcope, where, being parallel to the axis level, it will ftiew, when that is removed (as is commonly the cafe when terreftrial objefts only are obferved) whether the plane of the inftrument fuffers any alteration. If this ftiould have happened, the level on the horizontal bar is at all times fufficient to correft it. To fit the vertical Axis perpendicular. — This may be done by either level, but beft with the axis level, which, being fufpended on its pivots, muft be brought parallel with two of the feet of the inftrument ; and by the fcrews of thefe two feet, the bubble is to be brought between its indices. The circle being then turned round 180°, if the bubble changes its place, half the difference is to be correfted by one of the feet -fcrews, and the other half by two capftan- headed fcrews, that aft againft each other, under and be- longing to one of the Y's, or fupports, in which the pivots reft. When the bubble is found to be juft in thefe two pofitions, turn the circle 90°, which will neceffarily bring the axis over the third foot of this inftrument : then correft: any error there may be by that foot-fcrew. In this manner the circle will be made to revolve again and again, without any alteration whatever of the bubble, which ftiews that the vertical axis is then truly perpendicular to the horizon. To make the Line oJ Collimation in the Telefcope at right angles nuith the tranfverje Axis. — The pivots refting in their Y's, direft the telefcope to fome diftant well-defined objeft, and let the circle be clamped. Then reverfe the axis, that is, turn the telefcope upfide down. If the intcrfeftion of the wires does not coincide with the objeft in both pofitions, half the difference muft be correfted by the motion of the circle with the Hooke's joint, and the other half by the motion of the brafs Aide in the eye-end of the telefcope, by applying the milled-head key in the fmall focket feen in the figure ; and fo repeatedly until the difference whoUy difappears. Tofet the Rod on tuhieh the Elevation Level hangs parallel to the Line of Collimation. — The vertical axis being fuppofed to be THEODOLITE. be nearly vertical, hang the level on its rod, and reftify the bubble by the finger-fcrcw of the clamp. Set the horizon- tal wire on the fteel Aide, to interfedl the centre of the oblique wires, and place the dart or index at zero on the micrometer head. Then obfcrve fome dittant diftinft ob- ieft covered by the horizontal wire. Invert tin- fcmi- circle, that is, turn the azimuth circle i8o°, and the tcle- fcope upfide down, fo as to bring the wire upon, or nearly upon, the fame objeft. Now, if the level be not right, reftify it by the finger-fcrew at the tail of the clamp. If the telefcope does not now accurately cover the fame objeft, as in tlie former pofition, bifeft the difference by the finger- fcrew of the clamp, and then reftify the bubble by the capftan-nuts under one end of the rod. Repeat this opera- tion until the level is right, when the telefcope fees the fame objcft in both pofitions, and thereby tlie rod will be brought parallel in altitude to the line of coUimation, or «xis of vifion. We have defcribed other and more recent conftruftions of large circular inftruments, imder the word Circle, that have all the properties of the theodolite which we have here defcribed, and fome of which have the advantage of a large vertical circle, that renders their ufe in aftronomy co-exten- five with their application to geodetical operations, and which tlierefore we recommend in preference to the bulky inftrument with which the EngUfh trigonometrical furveys were performed. A theodoUte of a portable fize, and of Troughton's bcft conftruftion, is exhibited in Plate Y!^. fig. I. of Surveying, fuch as is adapted for land-furveying, or for tlie furveying of harbours. A, B, C, are the three mahogany legs of a tripod, furmounted with brafs joints which allow the legs to form one entire cylinder, about four feet long. The brafs-work above the three joints has a male fcrew, upon which a focket, under the brafs circular plate D E, fcrews, and bears the inftrument, whicli is alraoft entirely of brafs. This plate D E has four fockets made faft into it, projcft- ing both above and below, as feen in the figure, in which are exhibited three out of the four, with as many fcrews with milled heads, that afcend and defcend as they are turned round, forwards or backwards, by means of their connexion with their refpeftive fockets, that have each a female fcrew : the heads of thofe fcrews prefs againft the inferior face of the upper circular brafs plate F G, to vrhich a ball, ending with a vertical axis, is attached, and is embraced by the upper portion of the focket of plate D E, within the four fcrews. The intention of the ball and focket, and of the two plates with the four intervening fcrews, is to place the axis of the ball in a vertical pofi- tion, and to keep it in that pofition while the parts above are employed in making an obfervation ; which office this mechanifm will perform on Hoping as well on level ground. The axis of the ball, however, is made hollow, to admit of a fmaller folid axis within it, and has alfo two fockets or tubes furrounding it ; all which have feparate motions, when the ball is made faft by the prelTure of the four fcrews. The inner tube is attached to the graduated circle L M, of eight inches diameter, the chamfered edge of which circle is folid filver, that receives the dividing ftrokes read by the microfcope K : and the clamping piece, feen feparately mjig. 2, will fix the faid tube and graduated plate in any given fituation by means of the fcrew F, after which the fcrew G with the milled head, attached to the plate F G, will pro- duce the flow motion when neceflary. The lower telefcope H I turns on two pivots not feen, one of which pivots has Its. hole in a cock, borne by a fmaller circular plate under the graduated plate, into which the two fcrews H and I Vol. XXXV. enter, and the other pivot enters the butermoft tube; fo that an elevation or depreffion bf about 20° can be ef- fefted by this telefcope, before its motion is limited by the fupcrior and inferiof plates. This telefcope has 1 proper motion in azimuth, independently of the graduated plate, which motion is produced by the thumbjfci-ew H, the axis of which has a pinion afting with a concealed wlieel made faft to the graduated plate ; but when the clamping-fcrcw I is maHo faft, then the telefcope and gra- duated plate have but one common motion, Tvhich is com- manded by the tangcnt-fcrew G of the clamping-piece F G. The ufe of the feparate motion of this telefcope will be explained prcfently. Above the graduated plate L M, and in clofe contaft with it, the veniier-platc revolves with the folid or innermoft axis, that is faft to it, and its clamp and fcrew of flow motion are hid from tlie fight by the fuper- incumbent frame. This plate, which has four oppofite ver- niers, each reading to the accuracy of 15", will move fepa- rately, or may be clamped to the graduated plate, as occa- fion may require. Upon the plane of this vernier-plate, two fpirit-levels arc placed with their proper adjufting-fcrews, one of which is feen at N ; but the other, which ftands at right angles to this, is concealed in the drawing by the frame-work. A compafs and magnetic needle are alfo con- cealed within the frame, but may be conceived to be con- centric with the vernier-plate witiiin the faid frame. The tail-piece of the revolving microfcope K fits into a circular groove under the graduated plate L M, and, without hav- ing a centre of motion, wiU Aide along the groove into any of the four pofitions, where the verniers require to be read, without interfering with any of the other motions. The inftrument now before us has been fome years in ufe, and is drawn on an enlarged fcale, that all the parts may be the better defcribed ; but the moft recent theodolites of this conftruftion have only three verniers, in preference to four, by reafon of the property, which this number has, of mea- furing ztjix different and equidiftant points on the gra- duated limb, when the meafurement of an angle is repeated in a reverfcd pofition of the fuperior telefcope ; fij that whatever errors of excentricity or of graduation may exift in the horizontal circle, they will be made to vanifti, in a great meafure, by their counteraftion in the reverfed pofition of the verniers. Upon the plane of the vernier-plate is fcrewed, by three fcrews, forming an ifofceles triangle, the frame which fupports the pivots of the horizontal axis of the femi-circle P O, on which the upper telefcope T U is placed. The arm, which beai-s the microfcope O for reading the altitude or depreflion meafured by the femi- circle, has a tube that Aides upon the projefting horizontal axis, that allows of fome degrees of motion between the end-bars of the frame ; and another arm, that clamps the oppofite end of the faid axis, has a tangent-fcrew of flow motion at R, which finifties the final contaft of the inter- fefting point of the fpider's lines, within the eye-end of the telefcope, with the objeft viewed. The vernier for the femi-circle is fcrewed to the frame, after fpanning over the compafs-box ; and its exaft place may be adjufted by the fcrew of the frame above M, which ftands at the apex of the ifofceles triangle formed by the three fcrews. The level, that is feen under and parallel to the upper telefcope, is attached to it by two pairs of fcrews, one pair of wliich adjufts for the elevation or deprcffion of one end of the tube that holds the bubble, and the other pair adjufts laterally for true parallelifm in this refpeft : when the pins T and U are removed, the upper femi-circle of each ring, V and W, will turn back each on a hinge, and allow the telefcope to be taken out of its Y's, for the purpofe of being reverfed in 3 O po-ltion; THEODOLITE. pofition ; ai\d in both fUuitions the telcfcope is capable of Itavlng d circuloi- motion, tliat carriss the attached level round \; and this council decreed, that Theodoret was worthy to hold his fee, and he was accordingly reftored to the church of Cyrus. He died, without any further moleftation, in the beginning of th; reign of the emperor Leo, A.D. 457 or 458. Theodoret bears a high rank among the ancients as a commentator on the fcriptures for the purity of his Attic llyle, and the clearnefs and good fenfe of his explanations. He wrote commentaries upon moft parts of the facred fcrip- tures. His canon of the Old Teftament was very little, if at all, different from that of the Jews. With regard to the New Teltament, it appears that he received only four gofpels, the book of Ads, which he afcribed to St. Luke, and four- teen epiftles of the apoftle Paul, upon which he wrote com- mentaries ; digefting them according to the order of time in which th°y were written, and noticing the places from which they were fent. He has feldom quoted th? Catholic epiftles, though they are not wholly overlooked. He feems to have received the epiftle of James, the firft of Peter, and the firft of John ; but there is no certain proof that he received the book of the Revelation, or the other four Catholic epiftles : fo that we may conclude, that his canon of the New Tefta- ment was the fame with that of the Syrian Chriftians. His " Ecclefiaftical Hiftory," comprifed in five books, may be coiifidered as a fupplement to thofe of Socrates and Sozo- men : bejinninof where that of Enfebius ends, at the rife of Arianifm in 322 or 323, and terminating in 428. Its ftyle, according to Photius, is clear and fublime, but too much abounding in metaphors. It is deficient in chronological precifion, but contains many valuable documents, and fome remarkable circumftances, which other ecclefiaftical hifto- rians have omitted. His " Philotheus," or treatife on the monaftic life, the genuinenefs of which fome have qiieftioned without fufficient reafon, relates the aftions and extols the piety of the Eaftern monks, and abounds with inftances of tlje credulity and fuperftition of the times. In his work en- titled " Of Heretical Fables," in five books, he diftributes the different herefies into claffes, and concludes with a ftate- inent of the faith of the Catholic church. " The Cure of the falfe Opinions of the Heathens," in twelve diicourfes, is a learned and valuable apology for Chriftianity. Lardner has given copious extrafts from this performance, which merit high commendation. His other works confift of letters and trafts on different theological fubjefts. They are all com- prifed in the beft edition of his writings, which is that of Father Sirmond, in four vols. fol. Gr. and Lat. printed at Paris in 1642. To thefe the Jtf.ut Garnier added a fifth in 1684. Beaufobre gives the following candid account of Theodoret, " Theodoret is, in my opinion, one of the moft THE valuable of the Fathers. He is le.-u-ned ; he reafont well, efpecially in his dialogues againft the Greek herefies of his times : he is a good literal interpreter of the fcriptures. I cannot but admire his prudence and moderation, when 1 confider that he ended his ecclefiaftical hiftory at the time when the Neftorian difputes, in which he was fo deeply in- terefted, begun. But, I fear, his zeal againft heretics im- pofed upon him almoft as much, as his admiration of the heroes of the Afcetic life, with whom he was charmed. Monafteries have undoubtedly fent forth great men into the world ; but the difciplcs of the monks contrafted in their youth a fuperftitious difpofition which is fcarcely ever Ihaken off; and the weak fide of this able man feems to have been an exceflive credulity." Dupin. Moftieim. Lardner. Beaufobre. THEODORIC I., king of the Vifigoths, was the fon of Alaric, and in 419 fucceeded Wallia in the kingdom eftabliflied in the fouthof France. After raifing the fiege of Aries, he made peace with the Romans, and was fubfi- dized by them in the Spanifti war ; bat being defirous of re- newing his attempts in Gaul, he took an opportunity, in 43;, of refuir.ing his hoftilities againft them, and laid fiege to Narbonnc ; but beinp- compelled to raife the fiege, lie was under a neceffity of direfting his attention to the fafety ofTouloufe, his own capital, which was invefted by a body of Huns, under the command of count Litorius. In a very fanguinary engagement with the affailaiits, he totally routed them, and took Litorius prifoner ; who was firft expofed to the infults of the populace at Touloufe, and then thrown into a dungeon, where he died. After this event, Theodoric made peace with the Romans. His rank among the fo- vcreigns of that period was refpeftable ; and both his fona and daughters were well educated. The latter formed matrimonial conneftions with the eldeft fons of the kings of the Suevi and Vandals, who reigned in Spain and in Africa. But thefe conneftions proved unfortunate. The hufband of the Suevian princefs was maffacred by his brother ; and the Vandal princefs, being fufpefted of a defign to poifon her father-in-law, Genf:>ric, was doomed to lofe her nofe and ears, and in this mutilated condition was fent home to her father. Theodoric eagerly fought an opportunity for re- venging this cruel infult. With this view, the Vifigoths and Romans formed an alliance to refift Attila tie Hun, who, inftigated by Genferic, invaded Gaul in 441 ; and Theodo- ric, at the head of his army, m.arched to therelief of Orleans, which was befieged by the Huns. In their way the hoftile armies met on the plains of Chalons, and a dreadful battle enfued. Theodoric was wounded by a Goth in the fervice of Attila, and being difmounted, was trampled to death under the feet of his own cavalry. When his body was found, his funeral rites, were performed in the face of the retiring enemy. Theodoric, king of the Oftrogoths, furnamed the Great, was a defcendant of the Gothic race of the Amali, and born near Vienna, A.D. 455. At the age of eight years, he was fent to Conftantinople as a hoftage for the fulfilment of the fubfidiary treaty formed by the emperor Leo with the Goths. Here he had an opportunity of acquiring that charafler which he fuftained among the princes of that age : but his means of inftruftion muft have been very limited, when it is confidered that, though he excelled in all military exercifcs, he was io badly taught, as not to be able to write liis own name. After ten years' refidence at the court of Leo, he returned to his father, Theodomir, who was then the fole ruler of the Oftrogoths, in whofe fervice he diftin- guilhed himfelf by his martial fpirit. Upon the death of his father, in 475, the crown devolved on Theodoric. The em- pcrop THE T H E peror Zeno, wi/hing to lecure the attachment of the young itig powers for the fecurity of Iiis kingdom. He ellabhlhed peace with the imperial court at Conftantinoplc, married a daughter of the king of the Franks, and bcttowed his own two daughters by a concubine, one on tlic king of the Vifi- goths, and the other on the fon of the king of the Burgon- dians, and his filler on tlie king of the Vandals. He fe- cured the attachment of his foldiers by afiigning to them a third part of the lands of Italy ; and he reUriftcd the mili- tary pi-ofcflion to his countrymen the Goths, whilil hcencou- varicty of events occurred ; but, upon the whole, Theo- raged indulhy and the arts of peace among his Italian fub prince, invited him to his court, and conferred upon him the rank of patrician. After having rendered lubftantial fervice to ihe emperor, he was reduced to the ncccfiity of deferting the Roman caufe, and forming an alliance with Theodoric, the fon of Triarius. Having been altogether neglefted by Zeno, he marched in an iioftilc manner into the fertile pro- vinces of Thrace, whicli he laid watte with wanton cruelty. In the war that enfued between the empire and the Goths, a doric became more and more formidable, and by the death of the fon of Triarius, he was placed at the head of his na- tion. Such was the power he acquired, tliat the emperor found it neceffary to cede to him part of Lower Moefia and Lower Dacia, and to honour him with the confulate, which office he difcharged at Conftantinoplc. But con- ceiving that he was an objeft of jealoufy, and that his life was in danger, he withdrew into Thrace, and afterwards avowed himfelf an undifguifed enemy to the empire. De- clining to lay fiege to Conftantinople, he determined, as it is faid, at the fuggeftion of Zeno, to turn his forces againft Odoacer, who having depofed Anguftulus, the laft Weftern emperor, had affumed the title of king of Italy. In the year 488, Theodoric, having coUefted together all the fwarms of Goths that had fucceffively arrived on the frontiers of the empire, fet out on his Italian expedition ; and after encountering many difficulties in his progrefs, de- Icended from the Italian alps, and rejched the banks of the Sontius near Aquileia. Here, in Auguft 489, he attacked Odoacer's numerous hoft, and forced him to retreat as far as the plains of Verona. The refult of a fecond engagement was a complete vidory on the part of the Goths, which compelled Odoacer and his fugitives to take refuge within the walls of Ravenna, while the conqueror obtained pofFeffion of the cities of Pavia and Milan. But, as the fortune of war is uncertain, one of Odoacer's commanders, having deferted to Theodoric, proved treacherous, and induced feveral of the officers of the Gothic king to join his former mafter. Odoacer, having alfo gained an acceffion of other fugitives from the Gothic fervice, recovered Milan, and obliged Theodoric to immure himfelf in Pavia. Theodoric, how- ever, in this crifis of danger, obtained a powerful reinforce- ment from Alaric II. king of the Vifigoths, fettled in Gaul, and attacking Odoacer on the Addna, totally defeated him. Upon this difafter, Odoacer fted to Ravenna ; where, in the autumn of 492, he was befieged by Theodoric, who had made himfelf mailer of all Italy, except this city. In the following fpring, Odoacer was reduced to the neceffity of propofmg terms of accommodation, with which Theodoric complied ; and the confequence was the furrender of Ra- venna to the Gothic army. It was ftipulated between thefe two fovereigns, that they ffiould govern Italy with equal authority. Such a ftipulation was not hkely to produce any permanent effeft ; and it v^as very foon violated on the part of Theodoric, by an aft which entails on his memory eternal difhonour. Having invited Odoacer to a banquet, he ftabbed him, as it is faid, with his own hand, under a pretext that his dead rival had formed a fimilar defign with regard to him- felf. After this event, Theodoric ailumed the enfigns of royalty, and caufed himfelf to be proclaimed by his army " king of Italy." This affumption was reluftantly con- firmed by Anaftafius, the fucceflor of Zeno. The manner in which he excrcifed the royal authority, however unwar- rantable the means by which he acquired it, placed him far above all the fovereigns of that ag'". Sicily having been united to Italy by a voluntary ccffion, Theodoric fhcathed the fword of war, and cultivated alliances with neighbour- VoL. XXXV. jefts. The Goths held their lands and benefices as a mili- tary ftipcnd, in confideration of which they were engaged to march on a fummons under their provincial officers : and the whole extent of Italy was dillributed into the quarters of a well-regulated camp. The civil offices were committed to the native Italians ; and the form of government, and dillri- bution of magiftracies and of provinces, which had pre- vailed under the emperors, were continued ; fo that the tranf- fer of power from the Romans to the Goths was fo.ircely perceived. The taxes remained the fame, and on occafion of any public calamity, were remitted. He fixed his ordinary refidence at Ravenna ; and when he removed his court, it was to Verona. In the year 500 he vifited Rome, and was treated with refpedl. He ifTued edifts for preventing the demolition of ancient monuments, and appropriated reve- nues to the repair of public edifices. He decorated other cities of Italy ; and it has been faid, that, after the flourirti- ing times of Rome, this country was never fo profperous and happy. He provided a fleet for guarding the country againfl maritime attacks : and thofe wars by land in which he en- gaged, were terminated without difturbing the peace and ha- zarding the fecurity of Italy. By his prudent conduft, .iiid military achievements, he maintained the balance of power in the Weft, till it was overthrown by the ambition of Clovis, who defeated and put to death Alaric, the Vifigoth king : neverthelefs he faved the remainder of his family and people, and checked the career of the Franks. Theodoric, with regai-d to his religious fentiments and profeffion, was an Arian ; but he manitefted no aident zeal for making profelytes to his own opinions, nor did he moleft others in their profeffion. Such was the government of Theodoric, that it reflefted a fhort-lived luftre on the Gothic name, and eftabliffied an era of public happinefs which it is pleafing to contemplate. His fecretary Caffiodorus, who was himfelf a man of erudition, and who caufed his untaught mafter to patronize literature, has recorded in his twelve books of Epiftles, the events at which we have here glanced. It mult not be difguifed, however, that the reign of Theo- doric was not exempt from the evils infeparable from a def- potifm upheld by mihtary power. The yoke of a foreigner was galling ; and more efpecially that of a foreigner who was confidered as a barbarian and a heretic. The tolerant principles of Theodoric did not accord with the orthodox zeal ot his fubjefts ; and his puniftiment of fomc outrages committed againft the Jews, who were fettled in the cities of Italy, was reprefented as a perfecution of the church. An intolerant edift againft the Arians, iffued by the Byzantine court, provoked the king to retaliate on the Catholics under his jurifdiftion ; and ftiortly before his death an order was prepared to forbid the exercife of the Catholic worftiip in Italy after a certain day. In the mean time, jealoufies of the fe- natorial party in Rome, and of their conneftion with the impe- rial court, took pofieffion of the m.ind of Theodoric, who was made fufpicious by age ; and an inftance of tyranny infliftcd upon two exemplary charafters, fays one of his biographers, is unhappily the laft aft recorded of a fovereign diftinguifhcd for the mildnefs and equity of his adminiltration. For an ac- 3 P count THE THE count of thf fircumftancosto wtiich wrficrc rcfrr, fee thear- iklt Bor.Tiiius. Thcodoric, at the clofc of life, reflefted wnbout doubt with rcmorfc and felf-reproach on liis conduft to\¥ard8 Boethius and Sfmmachus. It is faid that, whilil he w ai fittinff at table, he perceived the gaping head of a large fiih, whicli was ferved up before him, and at the fight ex- ilaimcd, that he beheld the angry and menacing countenance vf Symmachus. Then probably did that fever commence, which being attended with a dyfentery, terminated his life within three days, Augiift, A.D. 526, in the -jid year of his age, and the 34th of his reign, dating its commencement with the death of Odoacer. His dominions were divided by his teftament between his two grandfons, Araalaric and Atha- naric, aflSgning the Rhone as their boundary ; and the guar- dianftiip of the latter, who was king of Italy, was entrufted with his daughter Amalafuntha. He erefted to his memory a. fpleiidid monument in a confpicuous fituation above the ci:y of Ravenna. Anc. Un. Hift. Gibbon's Rom. Hift. Gen. Biog. Theodoric, or Thierry ofNkm, an ecclefiriftiral writer, Wiis born at Paderborn, and ferved Gregoiy XI. Urban VII. and feveral fucceeding popes, as under-fecretary. The time ir. whicli he lived may be inferred from his " Hillory of the Schifm of the Popes," written between the years 1400 and 1410 ; in which work he fays that he had lived near thirty years at the court of Rome, and that being then worn down with age, it was his intention to withdraw from public bufinefs. Tnis work, compofed in Latin, comprifed, in three books, the interval from the death of Gregory XI. to the eleftion of Alexander V. Another work relating to the fame fubjeft was entitled " Nemus Unionis." In 141 2 he publiihed a " Treatife on the Rights and Privileges of the Emperors in the Inveftiture of Bidiops and Abbots." He alfo wrote a journal of the proceedings of the council of Conftance, ending in June 1416, in which year he died. From his own obfervation, he exhibits a (hocking pifture of the court of Rome, and the clergy of tliat period. Dupin. Moreri. THEODOROPOLIS, in Ancient Geography, a town of Mosfia, founded by the emperor Juftinian, who called it a/ter the name of his wife. THEODORUS, in Biography, a Cyrenaic philofopher, was a difciple of Aaicerris, and for fpeaking freely concern- ing the gods, he was ftigmatifed with the appellation of Atheiit, and banifhed from Cyrene. At Athens, where he lought refuge, he was protected by Demetrius Phalereus, and gained accefs to the court of Ptolemy Lagis. After- wards, upon his return to Athens, he is faid to have fuffered death by hemlock ; but it has been difputed whether atheifm, or contempt of the Grecian fuperttitions, was the caufe of his death. He is joined by Sextus Empiricus with Eume- rus, and others, who maintained, that thofe who were efteemed gods, were men who had poffefled great power on earth ; and Clemens Alexandrinus exprefies his furprife, that Eumerus, Nicanor, Diagoras, Theodoras, and others, who had lived virtuoufly, fhould be pronounced atheiils from their oppofition to gentile polytheifm. Briicker by Enfield, vol. i. Theodorus, an Athenian flute-maker, the father of Ilocrates the orator. How great the demand was at this time for flutes at Athens, may be conceived from a circumftance mentioned by Plutarch in his hfe of the orator. His father, fays he, acquired wealth fufficient by his bufi- nefs, not only to educate his children in a liberal manner, but alfo te bear one of the heaviefl: public burdens to which an Athenian citizen was liable ; that of furnifhing a choir or chorus for his tribe, or ward, at feilivals and religious cere- monies. See IsMBNiAs. THEODOSIA, in Ancient Geography, a town fituated on the S.E. coaft of the Tauric Cherfoncfus. See Caffa. — Alfo, a town of Afia, in the Greater Armenia. THEODOSIOPOLIS, a town of Afia, in the Greater Armenia, on the frontiers of Perfarmenia. — Alfo, a town of Afia, in Mefopotamia, upon the river Chaborras. THEODOSIUSI. furnamed the Great, in Biography, 0. Roman emperor, was the fon of an eminent general of the fame name, who was executed for trcafon at Carthage in the year 376. He was bom about the year 346, as fome fay, at Caucha, in Gallicia, or according to others, at Italica, near Seville. His education was liberal, and he learned the art of war by ferving under his father, both in Britain and in Africa. The death of his father put a temporary Hop to his military career, and he retired to Spain for the improve- ment of his mind and the cultiu-e of his paternal eftate. He was in this fituation when the emperor Valens was killed in battle, and the empire was left in great danger. Thus circumfl;anced, the other emperor, Gratian, fent for Theodofius, and in January, A.D. 379, declared him his partner in the empire. To him was committed the care of Thrace and the eallern provinces, threatened at this time by numerous bands of barbarians. The refult of his campaign was, that fome of the Goths fubmitted to his authority, and the refl; evacuated Thrace. Having been baptized ia the fecond year of his reign, in confequence of a dangerous difeafe, he became a zealous advocate for the orthodoxy of the church, and was^much applauded by the Catholics. He iflued an edift, enjoining the fubjecls of his government to adhere ftedfaftly to the rehgion taught by St. Peter, which aflerts the fole deity of the Father, the Son, and the Holy Ghoft, under an equal majefty and a pious Trinity ; and to aflunie the title of Catholic Chrlilians, all other perfons who did not embrace this dodlrine being branded as infamous heretics, and their churches being declared conven- ticles. It alio announces, that befides the condemnation of divine juftice, thefe perfons mufl expedl the fevere penalties which his authority, guided by heavenly wifdom, Ihall think proper to infliiil upon them. This declaration, fo incompa- tible with the geriuine fpirit of the religion and the pro- feffion in which he had been initiated, was followed by corre- fpondent deeds. When he entered Conftantinople, after the campaign of 380, his firll aft was to remove the patri- arch Demophilus, and to offer him the alternative of fub- fcribing the Nicene creed, or refigning all his dignities to the orthodox party. The patriarch nobly chofe the latter alter- native, and withdrew into exile. Soon after he iffued a decree for expelUng from their churches all the clergy who refufed to accept the Nicene creed, and he appointed a mi- litary force for the execution of it. By thefe meafures the emperor fucceeded, without tumult or bloodflied, in eftablifh- ing, through the provinces of the Eaft, the Catholic faith upon the ruins of Arianifm. So alliduous was the emperor in this exercife of his zeal, that he is faid to have promul- gated, in fifteen years, at leafl fifteen penal edifts againfl heretics, fome of which denounced capital punifhment : and it is moreover afferted, that the office of iiiquifitors of the faith was firfl intlituted in his reign. It has been affirmed, however, that he chiefly meant intimidation, and that the threatened penalties were feldom carried into effeft. The military ardour of this emperor feems to have been exercifed with greater prudence than his rehgious zeal. In order to liberate the provinces from the barbarians, he con- trived to weaken their flrength by fomenting divifions among their chiefs, .ind he conciliated others by his gene- rofity : fo that about four years after the death of Valens, he figned a capitulation with the whole nation of the Goths ; and THE THE and as tlieir own country was occupied hf tlie Hune, Le permitted them to fettle iu Xhrace and Moclin, with exemp- tions from tribute and taxes. With Maximus, who had revolted againll the emperor Gratian, Theodolius entered into a treaty, by which it was ftipulated that the ufurpcr ftiould retain the countries beyond the Alps, and that Valen- tinian, the brother of Gratian, (hould be fecured in the pof- feflion of the remaining part of the Weftern empire. Maxi- mus was acknowledged by Theodofius as his colleague in the Roman empire, and Arcadius, the fon of Theodofius, though only eight years of age, was admitted to a (hare in the purple. At this time Theodolius iffued fome fevere edifts againft heathen idolatry : and he pafTed a law againft the marriage of coufins-german, which condemned both parties to be burnt alive, and which declared their children illegitimate. In 386, the Gruthungi,orOftrogoths, in their attempt to pafs the Danube, were defeated witii great flaughter. In 387, Maximus invaded Italy ; and Valentinian, deferted by his fubjefts, took refuge in the dominions of Theodofius, who married Galla, the fifter of that emperor. In this year tht? people of Antioch, having without effeft remon.'trated againft the proceedings of 1 heodofius, both as to religious matters and the impofition of an extraordinary tax, broke out into an infurreftion ; threatened the hfe of the governor ; and, difappointed in this effort of their rage, dcmolilhed the llatues of the emperor and his family. Theodofius, in the firft tranfports of refentment, upon receiving intelligence of thair conduft, ordered the city to be laid in afties, and all the inha- bitants, without difcrimination of age or fex, to be put to the fword. Upon cooler reflettion he revoked this fanguin- ary order, and contented himfelf with degrading Antioch from the rank of a city, aiid depriving the inhabitants of their cuftomary largefs of bread. ThoTe who upon inquiry were found guilty, were condemned to death. But by the interceflion of the bifliop of Antioch, and other holy men, the culprits were pardoned, and the city reftored to all its privileges. Theodofius, on a vifit to Valentinian at Thcflalonica, pre- vailed on him to renoimre Arianifm, and to adopt the Nicene faith ; and determined totake up arms in his caufe againft Maxi- mus. After feveral fuccefsful encounters with the ufurper, he was defpoilcd of all his imperial ornaments, and dragged like a malefaftor into the prefence of Theodoiius, who caufed him to be beheaded. His fon Viftor was alfo put to death ; and the civil war terminated A.D. 388. In con- fequence of thefe events, Theodofius became the fole head of the Roman world ; and he inverted the fon of Valen- tinian, now a minor, with the fovercignty of the provinces wrefted from him by Maximus, and alfo with the pofleilion of Gaul, Spain, and Britain, of which Gratian had been de- prived by this ufurper. Theodofius remained three years in Italy, giving vigour to the law, correding abufes, and adopting a variety of raeafurcs for totally eradicating pa- gaHifm. In 390, a fedition took place at Thcffalonica, which was followed by many difaftrous confcquences, and by the ex- ercife of a degree of cruelty, which the emperor was obliged to expiate by a public penance. About this time he took advantage of a religious tumult at Alexandria for demolilh- ing the famous temple of Serapis, and of all the heathen temples throughout Egypt. He alfo ifiued a final edift Rgainft the ancient worlhip. In 392, the emperor Valentinian was murdered by his ge- neral Arbogaftes, and Eugenius was placed on the throne. When this meafure was announced to Theodofius, he prepared for war ; and having obtained a favourable anfwer from a holy hemiit in Thebais, whom he confulted, ilTucd new eJifts againft herefy, and abrogated the ancient penalties of treafon againft thofc v/ho uttered feditious words againft the prince ; he ojx-nly took up arms, A.D. 394, and forcing; the paflagc- of the Aljjs, dcfccndeil into Itsily. He met Euge- iiius and Arbogaftes witl i irr -^t force, and after feveral couflitts, Eugeniiis was t^'^aily defeated, and put to death by the ioldiers. His ch \1ren, however, and thofe of Arbo- gaftes, who put an end to his own life after the battle, were treated humanely, and removed to their paternal pof- fcflions. After this fucccfs, Theodofius fent for his fon Honorius to Milan, and declared him emperor of the Weft ; Arcadius having been already put in pofteftion of the Eaftern empire. In January 305, Theodofius terminated his life by a dropfical diforder at Milan, at tlie age of fifty years, and at the clofe of the fixteenth year of his reign. The name of Theodofius has been celebrated, blut his cha- ra£ler has been very differently appreciated. Politically con- fidered, whilft it exhibits many virtues and excellencies, it is chargeable with many errors and obliquities. Conncfted with the ecclefiaftical interefts of the period in which he lived, his conducl on various occaCons was altogether indefenfible ; and we may add, that how much foever he has been extoBed by partial hiftorians, his bigotry and intolerance were very reprehenfible. Anc. Un. Hift. Gibbon's Rom. Hift. Gen. Biog. TiiEODOSiOs II., fon of the emperor Arcadius, and grand- fon of the preceding Theodofius, was born in the year 401 ; and being of feeble faculties, was educated merely to fuftain the pageantry of a throne ; or, as Mr. Gibbon exprefles it, " to reprefent with grace and dignity the external figure of a Roman emperor." His only aftive purfuit was hunting ; and his more private exercifes were painting and carving, making elegant tranfcripts of religious books, and finging pfalms. He alfo failed, gave credit to miracles and doc- trines prefented to his faith, and paid due homage to all the dead and Hving faints of the Cathohc church. His dif- pofition was genUe and kind ; in his conduft he was free from vices, and yet, as his biographer fays, " he did not rife to virtues." Upon liis father's death, A.D. 408, he fiic- ceeded him in the Eaftern empire. To the influence of his fifter Pulcheria, fuperior in talents to himfelf, he implicitly fubmitted ; and in 414 he raifed ^her to the rank of Au- gufta, and entrufted with her the reins of government. By her feleftion and recommendation he married, A.D. 42 1, the celebrated Athanais, aftewards named Eudocia. The war which broke out in 422, in confequence of a perfecution ex- cited by the Magi againft the Chriftians, terminated in a truce of a hundred years, and a divifion of the kingdom of Armenia between the contending powers. On the death of the emperor Honorius, in 423, the throne of the Weft was ufurped by Joh;i ; but Theodofius reftored it to its proper heir, Valentinian III., who afterwards married his daughter. When Attila made an irruption into the Roman empire, he was oppofed by Theodofius, whofe armies were repeatedly defeated : and Theodofius himfelf was compelled iu 446 to make a humiliating treaty with the king of the Huns. By one of his favourites, the eunuch Chry faphius, he was induced to free himfelf from Attila by afraffination,but the treachery was defeated, and he received a juft and fevere reprimand from th£ barbarian. Soon after this mortification, he died in cdnfe- quence of a fall from his horfe, A.D. 450, in the fiftieth year of his age. What his grandfather had done towards the fub- verfion of the Pagan religion in the Eaft, Theodofijs com- pleted. He always approved himfelf a dutiful for of the church, but he is faid to have favoured the Eutychian herefy. His principal merit was the publication, A.D. 438, of the 3 P ? " Theodo/ian THE " Tbeodofian Code." Anc. Uii. HiiK Gibbon. Geo, Biog. Thiodosius, an eminent mathematician, was born at Tri- poli, and flourilhed about the fccond or third century. On the doftrine of the Sphere he wrote three books, containing a confiderable number of propolitions, demonftrated in the pure geometrical manner of the ancients, and cftablifhing the geo- metrical principles of aftronomy. Ptolemy and fucceeding writers availed thcmfelves of thefe book.s,\vhich were tranflated by the Arabians from the original Greek into their own lan- guaac. They were afterwards tranflated from the Arabic utto Latin, and printed at Venice; but the defefts of the Arabic verfion v/ere fupplied in a more complete edition, publidied in Greek and Latin at Paris in 1556, 410. by John Pena, regius profeflTor of aftronomy. On this work there have been many comments ; but the edition of Theodofius's Spherics now generally ufed is that of Dr. Barrow, pubhihed in 1675, illuftrat^'d and demonftrated in a new and concife method. Theodofuis was alfo the author of two other trea- tifes, one " De Habitationibus," and the other " De Diebus et Noftibus." Greek copies of thefe were preferved in the king's library at Paris, and a Latin edition was pub- lifhed by Peter Dafypodius in 1572. Montucla Hift. des Mathem. THEODULF, a learned prelate of a Gothic family, was a native of Cifalpine Gaul ; and being invited to France by Charlemagne, he was promoted to the bifhopric of Orleans, A.D. 794, and the abbacy of the monaftery of Fleury. He continued in favour at court till the death of Charle- magne, and for feme time under the emperor Lewis. But being implicated in the confpiracy of Bernard, king of Italy, againfl; Lewis, he was committed to prifon at Angers, where he remained in confinement for three years. After his liberation, and before his return to his diocefe, he died at Angers, about the year 821. Theodulf was the friend of Alcuin, and deferves honourable mention as one of the vo- taries and promoters of literature in a dark age. He was the author of feveral works, publiftied by Father Sirmond, in 1646, 8vo. One of his hymns, beginning " Gloria, laus et honor tibi fit. Rex Chrifte Redemptor," has been adopted by the Catholic church for the fervice on Palm-Sunday. Dupin. Gen. Biog. THEOGAMIA, ©:oyay.iu, in Antiquity, a Sicilian fef- tival, in honour of Proferpine, which feems to have been in- ftituted in memory of her marriage with Pluto. THEOGNIS, in Biography, a Greek poet, was a native of Megara, in Attica, and flourifhed about the year B.C. 546. He has been denominated " Gnomologus," or the writer of fentences : and we have extant a work written by him, without order, confift;ingof moral maxims or precepts, fimply expreffed and deftitute of poetical ornaments, verfi- fied probably for aflifting the memory. Athensus reckons him among the advocates for hcentious pleafures ; and Suidas refers to a work of his compoiition, entitled " Ex- hortations" or " Admontions," which contained various iinpurities. In the verfes that now remain, nothing of this kind appears ; fo that if the charge be true, they muft have undergone caftigation. " The Sentences of Theognis" have been often printed by themfelves, and with the works of other minor Greek poets. Among the beft editions are thofe of Camerarius and Sylburgius. Voffii Poet. Grjec. Gen. Biog. THEOGONY, formed from ©sot, God, and ymr,gemture, feed, offspring, that branch of the heathen theology which taught the genealogy of their gods. Hehod gives us the ancient theogony, in a poem unde» THE that title. This poem treats of the origin and defcent of the gods ; or rather, under the allegoricaTdrelo of theogony, reprefents the formation of the world, and the liiilory of eminent men. The plan of this work is intricate and confufed. (SccHesIOD.) The writer feems to have made uie of feveral different theogonies, and to have blended them together with little regard to confiftency. He alfo frequently adds, for the fake of poetical ornament, fiftiona of his own, which have no relation to the hiilory and origin of the world. Ariftophanes, in his comedy of " Tiie Birds," has introduced a defcription of the formation of the world, which was borrowed, without doubt, from the ancient theogonies ; but it deferves Lttle attention. All the theogonies make an eternal chaos the origin of all things. Thus Ovid. Met. 1. i. v. 5. " Ante mare, et terras, et quod tegit omnia coelum, Unus erat toto natura: vultus in orbe, Quern dixere Chaos, rudis indigeftaque moles. Nee quicquam niu pondus iners, congeftaque eodem Non bene junfturam difcordia femina rerun;." " Ere fea and earth, and heav'ns high canopy Were form'd, great Nature's face was one ; A lifelefs, rude, and undigefted mafs Of jarring feeds in one wild chaos lay." See Cn/cos. Whether, befides this chaotic mafs, the ancient theogo- nies fuppofe an infinite, a(Sive, intelligent principle, who from the firft matter formed the univerfe, is a quelUon that has occafioned much debate. It is cedent, upon the moft curfory review of the ancient theogonies, that God, the great Creator of all things, is not exprefsly introduced ; but it is doubted, whether the writers meant to exclude him from their fyftem, or indirecUv to fuppofe his exift- ence, and the exertion of his power in giving motion to matter. In the folution of this queftion, it ought to be confidered, whether the theogonifts fuppofed God to have exifted before chaos, and to have created it from nothing ; or thought hrm to have fprung from a pre-exifting chaos ; or conceived God and matter to have been two co-exifting and independent principles : whether they imagined God to have been the foul of nature, informing the eternal mafs of mat- ter ; or were of opinion, that God fent forth matter as an emanation from himfelf ; if the latter, whether this emana^ tion was the effeft of neceffity, or of a free aft of volition ; whether it was from all eternity, or began at fome limited period of duration. It muft alfo be inquired, whether,'ac- cording to the doftrine of the theogonies, a divine mind in- terpofed in the formation of the world, or the efFeft was pro- duced by the neceflary laws of motion afting upon homo- geneous and heterogeneous portions of matter. If the latter of thefe was their doftrine, it is to be farther confidered, whether it neceftarily follows, that they denied the exiilence of God, or whether it may not be fuppofed, that, neglefting all confideration of deity, they only endeavoured to explain the phyCcal formation of the world, by laws originally im- prefled upon matter by the author of nature. The theogonies certainly do not fuppofe God to have been prior in the order of time to matter : they fpeak of chaos as eternal, and feem to have been wholly unacquainted with the doftrine of creation from nothing. But, on the other hand, they never fuppofe the Deity to be derived from chaos : for Jupiter is not to he confounded with the Su- preme Being, but merely to be confidered as the chief of thofe inferior divinities, who, according to the Grecian the- ology, were either portions of the divinity, inhabiting and animating parts of nature, or departed fpirits of heroes and iUuf- THE T H K Tlluflrlout men, exalted to divine honours. There is no fuf- iicient proof, that Orpheus, Hefiod, or any other Grecian cofniugonift, fuppofed two independent principles in nature : (Or, though they afcribe the origin of evil to Chaos, they might, neverthclefs, be of opinion, as we !h;\ll find to liave been the cafe with many later philofophcrs, that matter is derived from God. There were, perhaps, different opinions among the ancient cofmogonifts, concerning the firft caufe of nature. Some might, poiTibly, afcribe the origin of all things to a ge- nerating force, deftitute of thought, which they conceived to be inherent in matter, without looking to any higher principle. But it is probable, that the general opinion among thsm was that which had prevailed among the Egyp- tians and in the Eaft, and was communicated by tradition to tlie Greeks, that matter, or chaos, exifled eternally with God, and that by the divine energy of emanation, material forms were fent forth from him, and the vifible world arofe into exiftence. This principle being admitted, the whole fyftem of the ancient theogonies appears confift- ent, and a fatisfaftory explanation may be given of moft of the Grecian fables. Upon tliis fuppofition, the lum of the doftrine of the theogonies, divefted of allegory and poetry, will be as follows : The firft matter, containing the feeds of all future being, exifted from eternity with God. At length, the divine energy upon matter produced a motion among its parts, by which thofe of the fame kind were brought together, and thofe of a different kind were feparated, and by which, according to certain wife laws, the various forms of the material world were produced. The fame energy of ema- nation gave exiftence to animals and men, and to gods who inhabit the heavenly bodies, and various other parts of nature. Among men, thofe who pofiefs a larger portion of the divine nature than others, are hereby impelled to great and beneficent actions, and afford illuftrious proofs of their divine original, on account of which, they are after death raifed to a place among the gods, and become objefts of religious worfhip. Upon the bafis of thefe notions, it is eafy to conceive, that the whole mythological fyftem, and all the religious rites and myfteries of the Greeks, might be founded. Brucker's Hift. Phil, by Enf. vol.i. Among the moft ancient writers. Dr. Burnet obferves, that theogony and cofmogony fignified the fame thing. (See Cosmogony. ) In effeft, the generation of the gods or the ancient Perfians, fire, water, and earth, is apparently no other than that of the primary elements. THEOLOGICAL Crii^icism. See Criticism. Theological Prebend. See Prebend. THEOLOGIUM, formed from ©ro,-, and \oyoi fpeech, or difcourfe, in the ancient theatre, was a place, or little ftage, above that on which the ordinary aftors appeared. See Theater. The theologium was tlie place where tieir gods appeared. It alfo included the machines on which they defcended, and from which tliey fpoke. There was a theologium required for the reprefentation of the Ajax of Sophocles, the Hippolitus of Eiu-ipides, &e. Seal. Poet. lib. i. cap. i. THEOLOGY, compounded of ©soj, God, and Xoyoc, dif- courfe, divinity ; a fcience, which inftrufts us in the know- ledge of God, and divine things ; or which has God, and the things he has revealed, for its objeft. Theology is a fcience which (hews us what -we arc to be- lieve of God, and the manner in which he would be ferved. It h divided into turo branches, the natural, and the revealtd or fuptrnatural. TiiEOLOGV, Natural, is the knowledge we hare of God from his wor' , by the light of nature, and reafon. Theolog; , Supernatural, is that wliich we learn from re- velation. See Religiok. Theology, Pofitive, is the knowledge of the iioly Scrip- tures, and of the fignificatiou of them, confoimably to the opinions of the fathers and councils ; without the afTiftance of any argumentation. But fome will have it, that this ouglit to be called expofttive, rather than poftti'ue. Theology, Moral, is tliat which teaches us die divine laws relating to our manners and aiAions ; in contradiftinc- tion to Theology, Speculative, which explains and eftablifhes the doftrines of rehgion, as objeds of faiUi. Theology, Schola/lic, or School, is that wliich proceed* by reafoning ; or that derives the knowledge of feveral divine things from certain cftabhftied principles of faith. See Scholastic Divinity. The ancients, according to Varro, Scxvola, and Plu- tarch, had a tluee-fold theology ; the firft fiv^LKn, mythic, fabulous, which fiourifhed among the poets ; and was chiefly employed in the theogony, or genealogy, and hif- tory of tlie gods : to whom all things were attributed, which men, and even the vileft of men, could be guilty of. Neverthclefs, the popular religion and worfliip were in a great meafure founded upon that mythology, which run through the whole of their religion, and was of great authority with the people. Many unexceptionable proofs of this are produced by Dr. Leland, in his " Advantage and Ncceffity of the Chriftian Revelation," vol. i. part i. chap. 6. The fecond, raoXiTixr, political, or civil, was that efta- bllfhed by the Roman laws, and chiefly embraced by the politicians, priefts, and people, as moft fuitable and expe- dient to the fafety, quiet, and profperity of the ftate. This, though not the true, was the vulgar theology, and conftituted the pubhc and authorized religion. It was that which the philofophers themfelves, whatever private opinions or fpeculations they might entertain, or difpute of in their fchools, univerfally conformed to in their own prac- tice, and alfo exhorted others to do fo. Varro informs us, that tliis theology particularly determined what gods they were publicly to worftiip, what facred rites they were to obferve, and what facrifices to offer. Although even the vulgar among the Pagans feem, in ge- neral, to have had fome notion of one fupreme God, yet their theology was properly polytheifm ; and the providence they acknowledged, was the providence, not of one God, but of many gods. The learned Dr. Cudworth, who feems inchned to put the moft favourable conftruftion upon the Pagan theology, acknowledges, that the civil theology, as well as the poetical, had not only many fantaftic gods in it, but an appearance of a plurality of independent dei- ties ; feveral being made fupreme in their refpeftive territo- ries or fundlions. Ariftotle (Oper. torn. i. p. 1246. edit. Paris, 1629) intimates, that according to the laws of cities and countries, that is, in the civil or political theology, there feems to be no one abfolutely powerful or all-perfeft being, but a plurality of gods, one of whom Is fuppofed to be more powerful in one refpeft, and another in another refpeft. Eefides, the pubhc religion was made up partly of the phy- fical, and 'partly of the poetical theology. Thofe poetical tables, which Varro cenfurcs as unworthy of the gods, and as afcribing to them aftions which none but the viJeft of THE n,en would be ffuiky of, were not ^^^Y f^'^J^f^ '^ ^ uded on tl>e public theatres, and heard wuh p oafui-e by he people, but Ihey were regarded as things pleal.ug to the ^,themfelvcs, by which they were P'-°P"t'=>^'^f .^"^ ,^"- Led favourable; and ^accordingly they were taken nUo the public religion. Games were celebrated, and p ay we^e fotufded upon them ; and the pubhc games and plays were on certain occafions conCdered as ^ft^°f/<^''g'°"'/"'°"■ raged bv their deities, and celebrated m honour of them It is alfo iuiUy obferved, that the images, forms, habits, and ornaments of their gods, their different faxes and ages, and the facrcd feftivals inftituted to their honour, had all ot them a reference to the fables of the poets and mytho ogifts, and were founded upon them ; fo that the civil and the fabulous thcolo"-'= {q + d)"~' = q"~' + (n — ijdy""- &c. we have for the Second Differences «d (n — l) dq"-- + &c. «d (n- I) dr"—--\- &c. nd (n — i) d j"~'-t- &c. Third Differences nd{tt— l) d (« — 2) dr"-» + &c. nd {« — i) d (« — 2) dj"-"+ &c. Fourth Differences nd{n— l)d(n — 2)dj"-'(n — 3) dr"-'+ &c. Whence, by an infallible and obvious deduAion, eth D'fferences «d (n — ») d (n — 2) (n — n — I ) d'oi" " (a + \)th Differences nd(n— i)d(n — 2) {n — n)dv~' . 3 Q 2 But THEOREM. But fince n — n = o, the (« + i)th differences =: o ; and fincc ■a;" ~ ' = w" = I , the nth differences become „(„_,)(„_ 2) („- 3) 3.2.1 d." It may not be amifs to obferve, tliat we have only em- ployed the firft term of the feveral orders of differences, which however is fufBcient for our purpofe, fince it is ob- vious that the nth difference can have but one term ; for the developcment of {p + d)"give8 n + i terms ; and fince one term vanifhes with every difference, the firfl difference will have 11 terms, the fccond n — i, the third n — 2, &c. ; and confequcntly the nth difference will have « — (" ~ 0 = I term only. See Irifh Tranfactions, vol. xi. or Monthly Review, vol. Ixxiv. Coles's Theorem, or Cotejian Theorem. — The geometrical properties of this very interefling theorem are explained under the article Cotesian" Theorem; it will only be necef- fary therefore in this place to ftate the fame analytically. In this cafe, the general enunciation is : " All the imaginary roots of the binomial equation x" — 1=0, are contained in the general formula x^ — 2 cof. 2 k;r '- .V -I- I = o ; and thofe of x" + I = o, in the formula n . (2/5+ l)^ ,, . X — 2 col. — .V -}- I = o, « bemg any mteger not divifible by n, and ^ reprefenting the femi-circumfcrence." See Reciprocal Equations. Euler's Theorem is ufed to denote the theorem or formula firft given by this author, for afcertaining the direft integra- bility of differential equations, which is as follows. The equation being reduced to the form Md.v + Ndji = o, M N where M and N are functions of x and v ; if ^— = -r— , then ay ax the integration may be obtained by a direft procefs ; but if this equality have not place, the integration can then only be effefted by indireft means, which frequently involve con- fiderable difficulty. Fermai's Theorem There are feveral theorems in the theory of numbers which are due to this ingenious analyft ; but that which is more particularly defigned by Fermat's theorem is this; •viz. " Neither the fum nor difference of any two integral powers, above the fquare, can be equal to a rational power of the fame dimenfion:" or,' which is the fame, the equation is always impoffible in rational numbers, if « be greater than 2. The cafes of n = 3 and n = 4 have been demonftrated ; but notwithftanding the numerous attempts of the 1110ft ce- lebrated anal)'fts of the laft and of the prefent age, the cafe of n = 5, and all the fucceeding values of «, remain with- out demonftration ; and as this is now the only theorem of this author which has not fubmitted to the power of the modern analyfis, the National Inftitute of France has made it the fubjeft of the prize of 3000 francs, to be decided by 1818. Under the article Numbbrs, amongft the mifcellaneous propofitions, we have mentioned another theorem of Fermat's, which had not then been demonftrated, but which has fince been effefted by M. Cauchy, correfponding member of the Inftitute. The reader will alfo find fome farther remarks relative to the equation jc" + f = z", under our article Power. Gau/s's Theorem is ufed to denote a theorem invented by this diltinguifhcd mathematician, for the folution of certaii; binomial equations. We have feen, in the article Recipro- cal Equations, \n what manner the roots of binomial equations may be obtained by means of a table of fines and cofines ; but Gaufs's theorem is the converfe of this, and fhews in what manner the fines and cofines of certain angles may be obtained, by tlie numerical folution of fuch equations. See Polygon. Guldin's Theorem h the fame as the Centrobaryc Method; which fee. Lagrange's Theorem is commonly ufed to denote the gene- ral formula affumed by Lagrange as the foundation of his theory of funftions ; which may be thus enunciated. " If C X be any funftion whatever of a variable quantity X, and if x changes its value, and becomes x + i, then the [x + i) = f .V + Pi + Qi' + Ri' + &e. in which the co-efBcients of the powers of i are new func- tions of .V, derived from the primitive funftion x, indepen- dent of / ; and, moreover, that every co-efficient is derived from the preceding one, in the fame manner as the firll m derived from the original funftion." See Functions. Leibnitz's Theorem is a theorem propofed by this author foi- differencing under the i\gnf, and it may be exhibited under , , d/Md.v ,dM^ ... Au ^ . the form -^^-^j = I — — d x, where JVl := -j— , u being ay -^ ay ax any funftion of x and y. „. d M d « omce - — ,— = — by the known principles of the Q.vdj ay ax differential calculus ; if we make u = / M d .■«, we fhall have d« ,, d^a dM _,. . ., - — = JVl, - — -^— = -r — ; and integrating with regard to x, ax ax ay ay 00 o we fhall find /• d" a .^ d V d X dy *^ d V d X dy J dy d x This is called by Leibnitz differentiatio decurva in curugm, becaufe in the queftion which he propofed to refolve, he paffed from one curve to another of the fame fpecies, by making one of the conftant quantities variable. See La Croix " Calcul Integral." AJaclaurin's Theorem is a formula which we owe to this author for expreffing any funttion y, of a variable quantity x ; •viz. adopting the differential notation, x^ -\- &e- where {y), [j^\ (-j— ^j, &c. reprefent what thefe feveral quantities become when x = o. Let jr c= A + B.M + C.v^ + Dk^ + &c. differencing, and dividing by d x, we have dx ix d\y dx3 = B -f- 2C.-C + T^.= 2C -I- 3D.-e' + &c. 2 .3 D« + &c. + 2 . 3 D -f &c. coufe- THEOREM. confequently, when .v in each of thefc = o, we have « = -.0 = «^(7^) = =^ 2 . 3 d.v = D; therefi ore, Sec Maclaurin's " Fluxions," and Boucharlat's " Calcul DifFerentiel, &c." Moivre's Theorem. See the next article. ' Myltinom'tal Theorem, fometimes called Moivre's theorem, having been firfl difcovered by that author, ?3 a general expreffion or formula for determining any power or root of a given quantity confiding of any number of terms. This theorem was firil pubhfhed by its author in N° 230. of the Phil. Tranf. 1697 ; but it was afterwards fim- plified by Euler in his " Calcul DifFerentiel," and the fame has alfo been done by Arbogaft in his " Calcul des Derivations." The general form of this theorem, as given in Bonny- caftle's Algebra, is as follows : (A + A.V + A.\-- + Ax3 + . . . . Ax')" = A" + c I -J 3 n wAB. Jl + . o A ^ 2m A B" a o + 3 m A B + 4m A B + (m-i)ABf2A + (2"'-i)ABljc3_ +(3,n_i)AB + {»; - 2) A B Where B = A", and B, B, B, &c. are the co-efficients 00 12 3 of the terms immediately preceding thofe in which they firft appear ; and the manner of applying this theorem to any particular cafe, is by fubflituting the numbers or letters in the given example for A, A, A, &c. and the numerical O 1 3 value of m for m. It would lead us too far to attempt the demonftration of this theorem in this place, we muft, there- fore, refer the reader for fuch information to the works above-mentioned. Ncwtoman Theorem. See Binomial Theorem. Taylor's Theorem, an elegant and highly valuable formula, which was firft publifhed by Dr. Brook Taylor in his " Methodus Incrementorum," which is as follows ; wz. " If Y reprefent any funftion whatever of the variable quantity x, and if x be increafed by any difference ^ x, the value of Y, viz. Y -H AY, becomes (employing the dif- ferential notation ) A»-d"Y Ax'd^Y Y + AY=:Y + AxAY A Y = A^-dY + 1 .2 A.v"-d d.v Y + 1 . 2 . 3dx Ax'd3 Y + &c. I . 2 . d.t- I . 2 . 3 d.v The demonftration of this celebrated theorem is given very concifely by La Croix, on the following principles. Let Y be any funftion of x, and let Y' denote what this funftion becomes, when x becomes x -t- /', we may write Y' = A + B/. + CA^ + D^3 ^ &c. in which developemeiit, it is obvious that A, B, C, &c. are funftions of .v. If now we difference this equation with h variable and x conftant, we obtain, dividing hy A.h, Y' y-; = B + 2C/j + 3D/J' + &c. Again, differencing with .v vaiiable and h conflant, we have Y' dA dB, dC,^ dD,, , J- =-~ + h 4 -r— h' + -— h' + &C. Qx doc ax ax ax But as X and h enter cxattly in the fame manner, it follows Y' Y' that — = -r-^ whence the firil of thefe feries is equal to the + (2 m — 2) A B + (m - 3) A B 4A + &c. focond ; equating, therefore, the co-efficients of the like powers of h, we have 2 d; Now B = - — , d X D = 3 d .%■' &c. A = Y, B = whence Y' = Y dY d.v ,C = d-Y I . 2 . d.\ l.D = d'Y dY h + dT I .2 h^ + d'Y Or writing Y' = we have AY ^"''^ I . 2 . 3 d .V Y + A Y, and .-« -i- A = .-v -I- A x. ,3 d: //-H&c. 1 .Ax + ^d = Y , 2 . d .V + A.v3d3Y + &c. I . 2 . 3 dj See La Croix " Calcul Differentiel," p. 21. Trinomial Theorem is only a particular cafe of the MM- nomialTheorem, which fee. Wdfon's Theorem is a curious formula relative to prime numbers, publifhed firfl by Waring in his " Meditationes AlgebraicjE," which is as follows. " If n be any prime number, then will I . 2 . 3 . 4, &c. {« - i) + I be divifible by n." This curious theorem was not demonflrated by fir John Wilfon, wlio firfl difcovered it, nor by Waring, by whom it was firfl made pubhc ; it lias, however. Since received different demonflrations from Lagrange, Gaufs, &c. the latter of which is very fimple, and has been adopted by Barlow in his " Theory of Numbers," to which work we beg to refer our readers, as it would require more room than we can allow ourfelves to give it at full length in this place. The above include, we believe, all thofe theorems which are known by any particular defignation ; there are, doubt- lefs, many others equally important, and whicli are equally entitled to bear the names of tlieir refpeftivo authors, but cuflom lias not fanftioned the adoption ; and we have, therefore, not introduced them. THEO. T H F THEORETIC, Thkorf.tical, or Theoric, fom\ed from S..--. /A or.onlrml,lju, fomething relating to theory, or tliat t'.Tii.ii..ilcs in fpeculatio... In which fenle it Hands oppofcd to hraBical. The Iciences are ordinarily divided yMo theoretical, asthco- lofry, philofophy, &c. ; md praflical, as medicine, law, &c. Set SllKSCK. ,• 1 • TiiKORETir, Theoretiais, is an appellation peculiarly given to an ancient fed of phylicians, contradiftingui(hed by it from the empirics. See EMflKiC. Theoretic plivficiaiis were fiich as applied themfelves to a careful lludy and confideration of what relates to health and difeafes ; the principles of the human body, and its ftrufture and parts, with their actions and ufes ; whatever befals it, cither naturally or pretcrnaturaUy ; the differences of dif- eafes, their nature, caufes, figns, indications, &c. ; the tex- tures, properties, &c. of plants, and other medicines, &c. In a word, the liieoretic phyficians were fuch as proceeded in their judgment and praftice on the fool of reafon, in op- pofition to the empirical phyficians, who proceeded wholly on experience. See Medicine. Theoretical Arithmetic and Philofophy. See the fub- llantivcs. THEORI, Swfoi, in Antiquity, an appellation given to thofe Athenians who performed the foleumity called thcoria. THEORI A, Siifix, a folemn annual voyage to Apollo's temple, in the ifland of Delos, performed by the Athenians always in the fame (hip in which Thefeus went. For the particularities of this naval proccflion, fee Potter Archasol. Grncc. lib. ii. cap. 9. torn. i. p. 284, feq. THEORIC lAo'St.\,\n Ancient Authors, was what was raifcd, by way of tax on the people, to defray the expences of theatrical reprefentations, and other fpeftacles. There were particular quedors and treafurers of the theoric money. By a law of Eubulus, it was made a capital crime to pervert tlic theoric money to any other ufe ; even to em- ploy it in the occafions of war. THEORICAL Astronomy, is that part of aftronomy which conliders the true llrufturc and difpofition of the hea- vens, and heavenly bodies ; and accounts for their various phenomena therefrom. Sec Astronomy. It is thus called, in oppofition to that part which con- fiders their apparent ftrufture, or their difpofition as viewed by the eye, which is cA\cA fpherical aftronomy. The feveral parts of theorical aftonomy, fee under Sys- tem, Sln, Star, Planet, Earth, Mook, Satellite, and Comet. THEORY, a doftrine which terminates in the fole fpe- culation, or confideration, of its objeft, without any view to the praftice or apphcation of it. To be learned in an art, &c. the theory fuffices ; to be a mafter of it, both the theory and praftice are i-equired. Ma- chines, many times, promife very well in the theory, yet fail in the praftice. We fay, theory of the moon, theory of the rainbow, of the microfcope, the camera obfcura, the motion of the heart, the operation of purgatives, &c. Theories of the Planets, &c. are fyftems or hypothefes, according to which the aftronomers explain the reafons of the phenomena or appearances of them. See Syste.m. Tjieory, in AJufic, in the hands of a mere mathematician is f onfined only to ratios and the philofophy of found. ( See Harmonics.) I5ut among praaical muficians, the theory of harmony or compofition is connefted with the combina- tion of agreeable founds, ^nd the praftice and performance pi real mufic. Theory, Atomic, in Chemifiry, the means of explaining 9 THE the compofition and dccompofition of chemical bodies, br confidering their ultimate atoms or particles as peculiar anif diftinft elementary fohds, never changing in their figure, weight, or volume, under any circumltances. It would be difficult to conceive the exiftencc of any com- pound, without fuppofing it to have originated by union, in fome way or other, of particles of its elcmentaiy conftituents ; but the prevalence of a doftrine, which has been generally advanced by mathematicians, -ufz. the infinite divifibility of matter, has never allowed philofophcrs to conclude that the circumftance of compounds being made up of particles, muft neceffarily limit the proportions in which the elements com- bine. If the elementary bodies be conceived infinitely divi- fible, the molecules, or compound particles, may be con- ceived infinitely fmall, and the number of mean compounds exifting between any two given extremes may be alfo con- fidcrcd Infinite. If fuch were the nature of elementary matter, and no other caufes interfered, there could be no limitation to the proportions in which fimple matter would combine. Thisj however, is contrary to faft; as it is a faft known from the carlicft dawnings of chemical knowledge, that bodies are limited in the proportions of their elements ; the moil ftriking of thefe fafts being the mutual faturation which takes place between an acid and an alkah, and the uniform proportions afforded in the analyfis of many native com- pounds. Philofophers were always fatisfied to confider this faft of the limitation of the proportions of bodies as one of the hidden fecrets of nature, as difficult to conceive as the nature of the atti aftion by which their elements were held together. Ber- thoUet appears to have been the firll to attempt this arduous tafk, in his ingenious work, entitled " Chemical Statics." He fuppofes that the particles of bodies, when brought within the fphere of attraftion, combine without controul till the compound affumes fome definite form, by which it is with- drawn from the fituation in which it was formed. He fup- pofes the chemical affinity of bodies to be diftinft from that power on which their cohefion depends, and alfo that power by which they tend to an elaftic ftate. Hence he concludes, that every folid compound is deter- mined by the cohefion which takes place at fome limit in the proportion of its elements : fuch he fuppofes to be the cafe with falts and other cryftallizable compounds. On the other hand, he fuppofes the hmitations of the proportions of the elements of gafeous compounds to arife from the elaftic form which they aflume in certain ftages of combination. This hypothefis was fupported by fo many ftriking fafts, that it was thought by fome to explain in general the caufe of limited proportions. All agreed, that whatever might be the true theory, the caufes pointed out by Berthollet had confiderable influence in the compofition and decompofition of bodies, but they faw at the fame time numerous cafes in which this hypothefis failed to explain the fafts. Chemifts have, from the earlieft times, been acquainted with thofe points of limitation which we call mutual fatu- ration, and have been long familiar with thofe limited aug- mentations of their proportions, called by fome dofes and by others particles. Among the oxyds of metals, which had been little examined before the time of Lavoifier, it was found, that inftead of having an infinite number of means between the loweft and higheft ftages of oxydation, only a certain number of oxyds of each metal could be formed, in which the ratio of the metal to the oxygen is uniform. Many of the falts in the fame way are formed by limited dofes of acid. Some of the fafts in the latter have been explained on BerthoUet's hypothefis, while its application to THKORY. lo the former fafts is totally intufficient. Long previous to tlie true caufe of thofe*liniited doles, the fafts were fo coiifpi- cuous, that a decided nomenclature was adopted for the pur- pofe of exprelling thefe difTereut Rages ot combination. The oxyds have been dillinguiflied by the Greek numerals prol, ilait, tr'it. Sec. The falts containing two dofes of acid have been cMed fuper-falts ; and thofe containing an extra dofe of bafe, have been ca\\edful)-Jhl/s. Although chemills have frequently ufed a language which appeared to Ihew their acquaintance with the real caufe of the definite proportions, fuch as one compound being forced by one proportion, dofe, or particle uf one of its elements, and another with two proportions, dofes, or particles : on the other hand, we find exprcfllons which would favour the idea of indefinite proportions ; fuch as bodies lofing a fmall portion of their oxygen, or abforbing a little oxygen from the atmofphere. Salts are foraetimes faid to contain a flight excefs of acid, or a fmall excefs of bafe. The moll decided language ufed in any chemical work before the difcoveries of Mr. John Dalton, giving any idea that the dofes are limited bv diftinct atoms, will be found in a work by Mr. Higgins, entitled " A Comparative View of the Phlogiftic and Antiphlogiftic Theories." We beg leave to correal a miftake in a former article, in which we have entitled this work a Treatife on Phlogifton. This work was written for the exprefs purpofe of com- batting the phlogiftic theory, and principally in anfwer to Mr. Kirwan's treatife of phlogifton. In order to fhew the <;ontradiclions and abfurdities of the phlogiftic doftrine, which, under the name of phlogifton, confounded a number of bodies which were very different, he exhibited by <5iagrams a number of chemical operations, in which he liippofed the elementary bodies concerned to be ultimate particles, and their immediate compounds molecules. He in the fame diagrams alfo ufed numbers, which he fuppofed to be eftimates of the ftrength of affinity of the combin- ing particles. By this means he very fuccefsfuUy fhewed many of the inconfiftencies which muft be admitted to explain the phenomena on the phlogiftic theory. In this mode of proceeding, however, the numbers exprelling the relative attraftions, ferved his purpofe much more than the :onfideration of the proportions being caufed by diftiniS r.toms ; and the language which would induce the belief that he had fucli a conception of the nature of elementary matter, occurs only in a very few parts of his work. After concluding that it is unneceflary to admit the ex- iftence of the imaginary fubftance phlogifton in fulphur, he concludes, in page 36, that fulphurous acid is compounded of one ultimate particle of fulphur with one of oxygen, and that fulphuric acid confifts of one of fulphur and two of oxygen. In the fame page he alfo obferves, that water is formed by one ultimate particle of water united to one of oxygen. In page 81, he fuppofes fulphuretted hydrogen to confift of nine ultimate particles of fulphur with five of hydro- gen. Previous, however, to this conchifion, he believes that the fulphur and hydrogen are not chemically combined, but that the fulphur is dilTolved in hydrogen, as a fait dif- folves in water. After ufing arguments to ftiew , in anfwer to Mr. Kirwan, that the nitric acid does not contain what was thought to be phlogifton, he concludes, in page 132, with giving what he conceives to be its conftituents, «/2. that the nitrous oxyd confifts of one ultimate particle of azote and one of oxygen ; litrous gas, of one of azote and two of oxygen ; red ni- trous vapour, one of azote and three of oxygen ; ftraw- coloured nitrous acid, one of azote to four of oxygen; and laftly, that the nitric acid is conftituted by one of az.ote and live of oxygen. Tliefe fafts are certainly very remarkable, as they agree with the conclufions in the prcfent time, and give a ftrong proof of Mr. Higgins's genius at the time he wrote. He does not, liowever, lay any llrefs upon thefe remai'ks, and was not probably aware that they would be confirmed by future refearch. We are induced to think fo, from the manner in which he exprefles himfclf in other parts of his work, in which he frequently fpeaks of the abforption of fmall portions of oxygen, and of bodies having a fmall portion of oxygen more than tliey can retain. This vague manner of fpeaking, and others which we do not immediately recolleift, is fuflicient to fliew that Mr. Higgins had no fixed notions of the caufe of definite proportions, and that the language in which he has ufed the words ultimate par- ticles and molecules, was employed rather with a view to illuftrate his examples, than to broach any new theory to explain indefinite proportions. Indeed it would have been inconfiftent to have treated two fubjefts, fo very different in their objefts, in the fame pages. As a proof that there was nothing ftriking in the remarks in which the words ultimate atoms and molecules are men- tioned, we only need refer to the article which Mr. Hig- gins himfelf quotes from the Analytical Review, written foon after the appearance of the work in queftion. The reviewer gives him the higheft praife for the able manner in which he lias refuted the doftrine ot phlogifton, but does not even hint at his diagrams or the ultimate particles. Indeed we can venture to aftert, that if no more had been faid on the fubjeft of definite proportions than is to be found in this work, w» might yet have been as much in the dark as we were twenty years after the publication of Mr. Hig- gins's " Comparative View." It was not enough to know that compound bodies were formed of particles, to enable us to explain the caufe of definite proportions ; and we waut no greater proof of this, than the faft of the true caufe not being known till twenty- eight years after Mr. Higgins liad told us that one particle of fulphur and one of oxygen formed fulphurous acid, and that one to two formed fulphuric. acid. Thefe loofe expreflions v/ere but a fmall ftep indeed tow.irds the difcovery of the atomic theory in its prelent form, which has placed chemiftry on the fame ground with that on which the difcovery of the laws of gravity placed the fcience of aftronomy. We are inclined to believe that the firft ftep towards this important difcovery was given by Richter. He found, in the double decompofition of falts, that the acid of one fait was always juft fufficient to faturate the bafe of the other, and •vice' verfd. He alfo afcertained, that when one metal was precipitated by another, the oxygen of the pre- cipitated metal was juft what was required by the preci- pitating metal. The inference to be drawn from thefe fafts was, that if A combine with .v to faturation, and B with y to the fame ; then, if A ihould be found to faturate y, B would alfo faturate x. This inference may be ftill further extended ; for if A be a body capable of combining -with B, they will mutually faturate each otlier. It is the means of drawing thefe inferences arifing from the mutual fitnefs of thofe parts of bodies which combine, that conftitutes the importance of the atomic theory, and it is for the eftablilhment of this new principle that we are in- dcbtedy to Mr. John Dalton. When Mr. Higgins can Ihew, ftom the data given in his work, that fimilar infer- euce* THEORY. anct3 could be drawn, he tlicn will be eotitled to (hare ui the merit of the difcovery of tlie atomic theory. Wc lay (hare with him, for wc are iinnly convinced that Mr. Dal- ton had never read Mr. Higgins's book previous to the pub- lication of his own work. We perfcftly recoileft the time, not more than four or five years ago, even when Mr. Dahon's book was before the public, vcr)' few chemills underllood the true fpirit of the atomic theory ; and thofe who conceived they did under- llaiid it, in general difcarded it. All knew that he con- fidered compounds to be formed of atoms united i to i, I to 2, I to 3, &c. : but it was not till the reciprocal fitnefs of thefc atoms with each other was found to agree with analyfis, that it was generally received. When they faw that the numbers, whicli Dalton called tlie weights of the atoms, expreffed tlie fimple proportions in which bodies combine, they knew it could not be the effeft of chance, and have willingly joined in the refearcli. It is for this part of the difcover)- that Mr. Dalton juftly merits the fame he has acquired. We have given all the fafts on which Mr. Higgins could poflibly found liis claim to the difcovery ; and we muft leave it to our readers to judge, whether they contain the fmallell data on which to eftablilh what in the prefent time wc call the atomic theory. In all the chemical articles fince the article Iron, we have had the grcateft confidence in the atomic theory ; and we have never failed to compare the analyfes of different autho- rities with the refults given by theory. We have in general found, that thefe refults have been nearer to the beft of thefe authorities, than they have been to each other. We have already given an outline of the atomic theory, with a table of the weights of the fimple atoms, and an- other of fome of the moft confpicuous compounds, in our articles Dcjinite Proportions, and Simple Bodies. The French chemifts have adopted the atomic theory under another form, which will be found to agree with the language given by Berzelius, who ufes the word •volume for atom, as we have already explained in the article above al- luded to. Gay Luffac feveral years ago publifhed a nevv- law refpeft- iiig the combination of gafeous bodies. He held that gafes which combine chemically, either unite in equal volumes, or I to 2, or fome multiple of i, by a whole number. Although a number of facls feemed to agree with this law, the truth of it was doubted by fome chemifts, and princi- pally becaufe no apparent reafon appeared for fuch a law. In ftating (under the article Proportions) the notion of Berzehus refpefting volumes, we have pointed out a curious coincidence between the fpecific gravity and the weight of atoms of the gafes, which has fince been con- finned by Dr. Prout in Dr. Thomfon's Annals. In order that the weights of the atoms may be equal to their fpecific gravities, we have there ftated, that the number of particles in equal volumes of all gafes muft be equal, and tlic dif- tance between the centres of the particles of all gafes the fame, fo that the weights of equal volumes of different gafes, would be as the weights of the atoms. This would alfo 'require, that the attraftion between the particles ftiould either be the fame in all, or that it (hould be nothing ; and the diftance of the particles be at points where the repulfion of the calorific atmofphere is balanced by the incumbent prclTure. The ftate hc-re fuppofed, however, is not the cafe, fince we find tiiat the weights of the atoms of the gafes gene- rally are not equal to the fpecific gravity, when reduced to the fame ftandard, although it is Itriclly the cafe with a great proportion of them. And in thofe cafes where they arc not equal, the one is faid to be fome multiple of the other, by a whole number. This circumftance favours the hope that fome general law exifts, by which the weights of the atoms of bodies are intimately connefted with their fpecific gravities in the elaftic form. When the fpecific gravity is double the weight of the atom, as is the cafe with oxygen, we have to fup- pofe, that the particles are nearer each other in the propor- tion of 2 to 1, or that two particles come together, and are furrounded by the caloric, which belongs to one o£ them in tlieir fingle ftate. It would appear that the oxygen puts on this fingle ftate of exiftence in the formation of carbonic oxyd, becaufe that gafeous body contains only one atom of oxygen ; hence its fpecific gravity is the fame as if it were formed from a gafeous oxygen of half the real fpecific gravity united to an atom of carbon without any change of volume, the fame as takes place when fulphur or carbon is burned in oxygen gas. Hence we may explain the gi-eat tendency that oxy- gen has to combine in double dofes with bodies, as is the cafe with carbon, fulphur, phofphorus, iron, and many other bodies. We have alfo an inftance of a compound gafeous body be- coming of double the fpecific gravity which would be ex- pefted in olefacient gas, which is compofed of an atom of carbon and an atom of hydi-ogen. The fpecific gravity (hydrogen being i) ought to be i -(- 5.4 = 6.4; but in faft it is about the double of this. Hence we fhould conclude, that the repulfion between the particles is halved, or that the compound atoms have united in pairs, by which the denfity is doubled. Theory of the ManufaRwe and ProduB'ion of Bread, in Rural Economy, the explanation of the principles and prac- tices on which it depends in different cafes. The means which are employed in fuch cafes are moftly well undcrilood ; but the principles upon which they depend are far from being fo well known. The writer of a late work on the " Ele- ments of Agricultural Chemiftry," has, however, thrown fome light on this hitherto intricate fubjeft. He has no- ticed, that a number of the changes taking place in the vegetable principles, depend upon the feparation of oxygen and hydrogen as water from the compound ; but that there is one of very great importance, in which a new combina- tion of the elements of water is the principal operation : this is in the manufafture of bread. When any kind of flour, which confifts principally of ftarch, is made into a pafte with water, and immediately and gradually heated to about 440°, it increafes, it is faid, in weight, and is found entirely altered in its properties ; it has loft its folubility in water, and its power of being converted into fugar. In this ftate it is unleavened bread. And when the flour of corn, or the ftarch of potatoes, mixed with boiled roots of the fame kind, is made into a pafte with water, kept warm, and fuffered to remain thirty or forty hours, it ferments, carbonic acid gas is difengaged from it, and it becomes filled with globules of elaftic fluid. In this ilate it is raifed dough, and aff"ords by baking leavened bread ; but this bread, it is faid, is four and dif- agreeable to the tafte ; and that leavened bread for ufe is made by mixing a little dough that has fermented, with new dough, and kneading them together, or by kneading the materials for the bread with a fmaU quantity of yeaft. It is ftated, that in the formation of wheaten bread, more than one-fourth of the elements of water combine with the flour ; r H E THE flour ; that more water in proportion is confolidated in the formutioii of bread from barley, and ftill a larger quantity ill that from oats; but that the gluten in wheat, being in mucli larger quantity than in other grain, feems to form a combination with the ilarch and water, which renders wheaten bread more digellible than other fpecies or kinds of bread. On this principle too it is probable, tliat this fort of bread may be more fuitable and proper for the lefs labori- ous clafTes of fociety, though the other kinds may be equally or more .nourirtiing and lauing for thofe who are engaged in hard work. THEOSOPHI'STS, the denomination of a clafs of philofophers, who profefs to derive their knowledge of na- ture from divine revelation. Not contented with the natural light of human reafon, nor with the llmple dotlrines of fcripture underllood in their literal lenfe, thefe perfons have recourfe to an internal fupernatural hght, fuperior to all other illuminations, from which they pretend to derive a myfterious and divine philofophy, manifefted only to the chofen favourites of heaven. They boall, that, by means of this celeftial light, they are not only admitted to the intimate knowledge of God, and of all divine truth, but have accefs to the moft fublime fecrets of nature. They afcribe it to the Angular manifeftation of divine benevolence, that they are able to make fuch an ufe of the element of fire, in the chemical art, as enables them to difcover the cflential principle of bodies, and to difclofe ftupendous myfteries in the phyfical world. (See Fire Philofophers.) They even pretend to an acquaintance with thofe celeftial beings, which form the medium of intercourfe between God and man, and to a power of obtaining froui them, by the aid of magic, ailrology, and other fimilar arts, various kinds of information and afliftance. This they afRrm to have been the ancient fecret wifdom, firft revealed to the Jews under the name of Cabbala, and tranfmitted by tradi- tion to pofterity. Philofophers of this clafs have no com- mon fyftem ; but every one follows the impulfe of his own imagination, and conftrucls an edifice of fanaticifm for him- felf. They only agree in abandoning human reafon, and pre- tending to divine illumination. Many traces of the fpirit of Theofophifm are to be found in the whole hiftory of philo- fophy, in which fanatical and hypocritical pretenfions to divine illumination frequently occur. Among moderns, the fii-ft name that is mentioned with any diftinftion in this clafs of philofophers is Paracelfus. ( See his biographical article. ) He was fucceeded by Robert Fludd, who compounded into a new mafs of abfurdity all the myfterious and incom- prehenfible dieams of the Cabbahfts and Paracelfians. He fuppofed two univerial principles, the northern or condenf- ing power, and the fouthern or rarefying power ; and over thefe he placed innumerable intelligences and geniufes, and called together whole troops of fpirits from the four winds, to which he committed the charge of difeafes. ( See his article.) Another dazzhng luminary in the conftellation of Thcofophifts was Jacob Bcehmen. See Behmen. A more fcientific Th.eofophift than Boehmen was Van Helmont. (See Helmont.) The moft elegant and philofo- phical of all the Thcofophifts was Peter Poiret, who was born at Metz in the year 1646, and educated in the academy of Bafil. In 1668 he became a ftudent in the univerfity of Heidelberg, with a view of qualifying himfelf for the cleri- cal profeflion, and in 1672 he alTumed the charafter of an ecclefiaftic in the principality of Deux-Ponts. After a fevere fit of illnefs, he wrote his " Cogitationes Rationales de Deo, Anima, et Malo," in which he moftly followed the principles of Des Cartes, having in his youth ftudied the Vol. XXXV. Cartefian philofophy ; a work which he defended againft the cenfures of Bayle. Being obhged by the public tumults to withdraw from his clerical cure, he removed to Holland, and afterwards to Hamburgh, where he became acquainted with the celebrated myftic Mad. Bourignon, and cnhfted himfelf in the number of her difciples. Abandoning Car- tefianilm, and fafcinatedwith Bourignonian myfticifm, he re- jected the light of reafon as ufelefs and dangerous, and in- veighed againft every kind of philofophy that was not the effeft of divine illumination. Towards the clofe of his life he fettled at Rheinfburg, in Holland, and employed himfelf in writing myftical books ; luch were his treatifes " Dc CEco- nomia Divina," " De Eruditione Triphci," and the laft edi- tion of his " Cogitationes Rationales." He died in the year 1 7 19. Some of his myftical notions may be colleAed from the preliminary differtation prefixed to his works : they are fuch as thefe : " It hath pleafed God, in order that he may enjoy a vivid and delightful contemplation of himfelf, be- yond that folitude which belongs to the divine eftence, to create external beings in whom he may produce an image of himfelf. The eftence of the human mind is ' thought,' capable and defirous of light, and joyful complacence ; the properties in which it bears a refemblance of the divine effence. Nothing is more intimate or eflential to the mind than this defire ; by which it is borne always towards the true and infinite good. In order to fatisfy this defire, the illumination of faith is neceffary ; by means of which the mind, confcious of its weaknefs and impotence, difclaims all the fiftions of human reafon, and direfts itfelf towards God with an intenfe and ineffable ardour, till, by the fiknt contemplation of him, it is filled with tranquillizing light and joyful complacence ; although, whilft opprefTed with the load of mortahty, it cannot behold his unveiled face. From this divine illumination proceeds the moft pacific fe- renity of mind, the moft ardent love of God, and the moft intimate union with him." To the clafs of Thcofophifts it has been ufual to refer the entire fociety of Rofycrucians ; which fee. It will be fufficient to obferve, at the clofe of this article, that the whole fyftem of Theofophifm is founded in delu- fion, and that it is injurious both to philofophy and rehgion. Thefe fuppofed illuminations are to be afcribed either to fanaticifm or to impofture. The faftidious contempt, with which thefe pretenders to divine wifdom have treated thofe who are contented to foUow the plain dictates of common fenfe, and the fimple doftrine of fcriptures, has unquef- tionably impofed upon the credulous vulgar, and produced an indifference to rational enquiry, which has obftrufted the progrefs of knowledge. And their example has encou- raged others to traduce philofophy and theology in general, by reprefentiug them as refting upon no better foundation than enthufiafm and abfurdity. It is to be charitably pre- fumed, that thefe deluded vifionaries have not been them- felves aware of the injury which they have been doing to the interefts of fcience and rehgion. Neverthelefs, it muft be regretted, both on their own account, and on account of the multitudes they have mifled, that whilft they have thought themfelves following a bright and fteady luminary, they have been led aftray by wandering meteors. Brucker by Enfield. THEOTOCUS, Deipara. See Mother 0/ Go//. THEOXENIA, eic^ina, in Jntiqmty, 3. feftival in ho- nour of all the gods, and celebrated in many cities of Greece, but efpeciaHy Athens. THEOXINI Malagma, the name of a fort of cata- plafm, good againft pains of the feet. THERA, m Ancient GeographyyOXX of the iflands called 3 R Sj^QradfS) THE rt*,nJn, in the jEgein fea, bclween the inand of Crete aiiJ the Cycladw. It is faid to have taken its naine from Theras, a priuco of the race of Cadmus, who removed from Lace- dimon into this inaiid, which was occupied by the defccnd- ants of the Membharii, who had poffeffion of it 1 550 years before our era ; wher.-as Pliny fays that it firft appeared in the fourth year of the 135th olympiad. Tins ifland is now called Sanlorin; which fee — Alfo, a town of the idand of the fame name.— Alfo, a town of Afia Minor, in Caria, be- tween Idymus and Pyllus.— Alfo, a town of Afia, in Sog- diana. THE RAMBUS, a town of Macedonia, in the penin- fula of Fallen^. THE RAM N^, a town of Afia Minor, in Lycia ; con- fecrated to Apollo. THERAPEUTjE, SepxTsura., a Greek term fignifying fervants, more efpecially thofe employed in the fervice of God. The -Greeks gave the appellation therapeutic to fuch as appliL'd themfelves to a contemplative life, whether it VKie from the great concern they had for their fouls, or from the particular mode and manner of their religion ; the word 5,:a-£i/Fi», whence therapeuta, fignifying the care a phyfician takes of his patient, or the fervice any one renders another. Philo, in his firfl book of the Contemplative Life, relates, that there were a people fprcad throughout moft of the known world, but particularly throughout Egypt, and about Abxandria, who renounced their friends, their goods, &c. and who, after difcharging themfelves of all temporal concerns, retired into folitary places, where they had each their feparate manfion, called femne'ium, or monajlery, and placed their whole felicity in the contemplation of the divine nature. The principal fociety of this kind was formed near Alexandria, where they lived, not far from each other, in feparate cottages, each of which had its own facred apart- ment, to which the inhabitant retired for the purpofes of de- votion. After their morning prayers, they fpent the day in ftudying the law and the prophets, endeavouring, by the commentaries of their anceftors, to difcover fome allegorical meaning in every part. They alfo amufed themfelves with compofmg facred hymns in various kinds of metre. Six days of the week were thus pafled in folitude. On the feventh day they met, decently clothed, in a public affembly, where, feated according to their age, they held the right hand between the breaft and the chin, and the left at the fide. Then one of the elders, ftepping to the middle of the alTcmbly, difcourfed, gravely and calmly, on the doc- trines of the feft ; the audience remaining filent and occa- fionally exprefling their approbation by a nod. The chapel in which they affembled was feparated into two apartments, one for the men, the other for the women. At the clofe, the fpca-ker fung a hymn of praife to God, in the laft verfe of which the whole anVmbly joined. On great feftivals, facred mufic was performed, accompanied with folemn danc- ing ; and thefe vigils were continued till morning, when the aflembly, after a morning prayer, in which their faces were direfttd towards the rifiiig fun, was broken up. Such was their abftemioufncfs, that they commonly ate nothing before the fctting fun, and often faded two or three days. They wholly abltaincd from wine, and their ordinary food was bread and herbs. There are two points relating to thefe therapcuts ex- ceedingly controverted among critics, viz. i. Whether they were Jews or Chriftians ; and, 2. If they were the Jatter, whether they were monks or feculars >. Molhehn affirms, that the therapeutse were neither Chrif- 10 THE tians nor Egyptians, as fome have erroneoufly imagined ; they were undoubtedly Jews ; nay, they gloried in that title, and ftyled themfelves, with particular affectation, the true difciples of Mofes, though their manner of life was equally repugnant to the inftitutions of that great lawgiver, and to the diftates of right reafon, and (hewed them to be a tribe of melancholy and wrong-headed enthufialls. Calmet alfo, in his Diftionary of the Bible, alleges a variety of reafons to prove, that the therapeutx were Jews and not Chrillians ; and that they were not monks in the fenfe which ecclefiaftical writers affix to this term. Some have imagined that they were judaizing Gentiles ; but Philo, by claffing them with the Effenes, evidently fuppofes them to be Jews. Others have maintained, that they were an Alex- andrian feft of Jewifli converts to the Chriftian faith, who devoted themfelves to a monaftic life. But this is impoffi- ble ; for Philo, who wrote before Chriftianity appeared in Egypt, fpeaks of this as an eftablifhed feft. From a com- parifon of Philo's account of this feft with the ftate of phi- lofophy in the country where it flourifhed, we may reafon- ably conclude, that the therapeutx were a body of Jewifh fanatics, who fuffered themfelves to be drawn afide from the fimplicity of their ancient religion by the example of the Egyptians and Pythagoreans. It is uncertain how long this feft continued ; but it is thought not improbable, that, after the appearance of Chriftianity in Egypt, it foon be- came extinft. See Essenes. THE R APEUTICE, Therapeutics, ^i^axw^^x-n, form- ed from 9ffa^iU!i'.', to ezttend, to nurfe, cure, &c. that part of medicine which is employed in feeking out remedies againft difeafes, and in prefcribing and applying them to effeft a cure. Therapeutice teaches the ufe of diet, pharmacy, furgery, and the methodus medend'i. Therapeutice is alfo ufed figuratively, in fpeaking of the mind, and of difcourfes made to correift the errors and defefts of it. Such is the Therapeutice or Therapeutics of Theodoret ; being a treatife againft the errors of unwholeiome opinions of the Greeks, i. e. the heathens. THERAPHIM, or Teraphim, an Hebrew term, which has given great exeixife to the critics. We meet with it thirteen or fourteen times in Scripture, where it is com- monly interpreted idols : but the rabbins are not contented to have them fimply fignify idols, but will have it denote a peculiar fort of idols or images intended for the knowledge of futurity, /. e. oracles. R. David de Pomis obfcrves, that they were called thera- phim, from nD~l> raphah, to leave, becaufe people quitted every thing to confult them. Others hold, that the theraphim were brazen inftrun>ents which pointed out the hours and minutes of future events, as direfted by the ftars. R. Eliezer tells us the reafon why the rabbins will have the theraphim to fpeak, and render oracles : it is, fays he, becaufe it is written in the prophet Zechariah, x. 2. " The theraphim have fpoken vain things." The fame rabbin adds, that to make the theraphim, they killed a firft-born child, clove his head, and feafoned it with fait and oil : that they wrote on a plate of gold the name of fome impure fpirit, laid it under the tongue of the dead, placed the head againft the wall, lighted lamps before it, and prayed to it, and that it then talked with them. Vorftius alfo obferves, that, befide the paffage of Zecha- riah, juft quoted, it appears hkewife from Ezekiel, xxi. 21. that the theraphim were confulted as oracles. F. Kircher direfts us to feek the origin of the theraphrnt THE THE in Egypt ; adding, that the word is Egyptian. Spencer, ill his diiTei-tation on the urim and thumnum, maintains the word to be Chaldee, and to fignify tiie fame with feraphini : tlie Chaldeans being frequently known to change tlie ^ into J^, that is/into /. He adds, tliat thofe images were bor- rowed from the Amorltes, Chaldeans, or Syrians ; and that the Scrapis of the Egyptians is the fame thing with the theraphim of the Chaldeans. See Selden de Diis Syris, fynt. i. cap. 2. Calmet obferves, tliat the figure of a winged ferpent, called yjj-.j^/;, whence the name ieraphim, has given rile to the appellation theraphim, becaufe in the abraxas and other tahfmans of the ancients, which arc real tlieraphims, we find the figures of ferpents both with and without wings ; whence he infers, that the theraphims of Laban, which were ftolen by Rachael, were real tahfmans. Jurieu conjeftures, that thefe theraphims were the penates, or houfliold gods ot L.aban, which, he fays, were the fouls of the heroes of families, deified and worlliipped ; and he adds, tliat the the- raphims of Laban were the images of Noah, the reftorer of the human race, and of Shem, tlie chief of the family of Laban. But Calmet, in reply to this conjetluie, obferves, that it is by no means credible, that the worfhip of the penates and lares was known in the time of Laban ; and that it is not likely, that Laban fhould have ranked among the gods Noah and Shem, who had died fo near his own time: for Noah died A.M. 2006, and Shem A.M. 2158, about eighty-feven years before Jacob came to Mefopotamia after Laban. THERAPIDION, in Botany, a name given by fome authors to the common oyfter-green, orfea-laver, a fubftance of the tremella kind. THERASIA, in Geography, a fmall rocky ifland in the Grecian Archipelago, feparated from the N.W. coaft of Santorin (the ancient Tliera) by a narrow channel, which forms a fecure harbour for boats ; 3 miles N. of St. Nicolo. Therafia is faid by Townefort and Sonnini to be the prefent Afpronifi (^\v\ac\\ fee) ; but Olivier mentions them as diftinft iflands. Therafia, fays this laft -mentioned traveller, on which Ptolemy places a town, and which Pliny conjedlures, with reafon, to have been detached from Thera, cannot be taken for Afpronifi, nor the latter for the former, as Tournefort imagines. Afpronifi is not large enough to have had upon it the fmalleft village, or the imalleft habitation ; whereas Therafia has fufficient extent, and ite territory is fufficiently good, to have been always the fcite of a town, as one is ftill to be feen there at the prefent day. THERESA, a river of Africa, which runs into the Atlantic, S. lat. 1 3°. Theresa, Ordir of Maria, a military order inftituted by the emprefs-queen in Gewnany, on the i8th of June, 1757, and compofed of two clafles, viz. grand crofles and knights. To thefe the emperor Jofeph H., in the year 1765, added an intermediate clafs, under the appellation of com- manders. The number of knights is not fixed, and the em- peror is grand-mafter. The badge of the order is, " a crofs of gold, enamelled white, edged with gold ;" on the centre are the arms of Auftria, vi'z. " gules, a feffe-argent, encir- cled with the word Fortitudini ;" on the reverfe is " a cipher of the letters M. L. F. in gold, on an enamelled green ground." The badge is worn pendant to a ftriped crimfon and white ribbon. THERGUBIS, in Ancient Geography, a town of Afia, in the interior of Mefopotamia, fituated on the bank and towards the fource of the river Chaborras. THERIACA, Stipiaica, Treacle, in Medicine, a name given by the ancients to various compofitions eileemed good againil poifons ; but afterwards chicfly"re(lfained to what, by way of diftindion, has been called thcriaca Andromachi, or y'enice treacle : but now altogether out of ufe. This is a compound of no lefs than fixty-four dnjgs, pre- pared, pulverized, and reduced, by means of honey, into an cleftuary. The bafis or foundation of the compofition is viper's flefh. M. Charas has written a particular hillory of the animals, plants, and minerals, which enter the compofition of this famed remedy. It is faid to be fovereign againft the bites of venomous beads, and in the wind-colic ; and was alfo ufed in inter- mitting fevers, and in cafes requiring perfpiratives and dia- phoretics ; alfo in continual fevers, efpccially fuch as are ma- lignant, and where the pulfe is low and ticking ; and in the fmall-pox and meafles : and, as mod of the ingredients of it are very hot, in all difeafes where the natural heat is weak and languid. Andromachus, Nero's phyfician, paffcs for the inventor of the theriaca ; at leaft, it was he who gave the firft de- fcription of it in elegiac verfes ; his fon did the fame in profe, and Damocrates in iambics. Anciently, the treacle made at Venice had all the vogue ; and many ftill retain the ancient prejudice ; but it has been fince prepared at Montpellier, at Paris, and at London, with as much advantage as at Venice. There is another vulgar kind of theriaca, called diatejfarov, becaufe it only confifts of four ingredients. Treacle-water and trcacle-vinegai- are found good prcferva- tives againft putrid aii-, whether by only being fmelt at, or by rubbing the wrifts, temples, and nofe with them. Theriaca Rujiicorum, a name given to garlic, from its ufe as an antidote againft the contagion of peftilential and other putrid diforders. THERIOMA, from S'fiow, to rage, in Surgery, a ma- lignant ulcer. THERMA, in Ancient Geography, a town of Cappadocia, on the route from Tavia to Cxfarea, between Tavia and So- anda. Anton. Itin Alfo, a town fituated on the confines of Macedonia, or rather of Theflaly, towards Thermopylae. This town was fituated on the gulf called Thermasus, whence its name. Therma Pythia, baths of Afia Minor, in Bithynia. Pro- copius mentions this place, and fays that Juftinian conftruftcd here a bath for public ufe, and a canal to conduft into it frefli water, and that he alfo provided others, which indicated a magnificence truly royal. THERMiE, Ssfiucii, in ArcbiteUure, ancient buildingi, furnifhed with baths, efpecially of the hot kind. Among the nobleft monuments of ancient Rome, are reckoned the thermae, or baths of Dioclefian. See Bath.s. Thermae, or hot fprings, it is commonly argued, owe heat to a coUuftation, or effervefcence, of the minerals in them. Though Dr. Woodward afcribes it to the fubterraneous heat, or fire, which communicates with them by fome fpi- racle, or canal, whereby a greater quantity of heat is derived thither, than to ordinary fprings. See Bath. Thermae, in Ancient Geography, a place on the fouthern coaft of Sicily. Pliny denominates this place a Roman co- lony ; and Antonine calls the fources of the hot water which gave the name of Thermae to this place " Aqua Larodae." There were alfo baths at Sehnonti in Sicily, called Thermae Selinuntise. The name thermit was alfo given to thofe highJy faline warm waters that were found in the neighbourhood of Corinth. THERM^US Sinus, a gulf of the JEgean fea, on the coaft of Macedonia. THERMASMA, a word ufed by fome of the ancients 3 R 2 to T H E to cxpreU any thing that warms the body, and by others particularly for a warm fomentation, prefcribed by Hippo- crates for rrmoving pains in the fido, and giving eafe in plcurifics. THERMKS, in jlncimt Geography, a town of Hifpania Citerior, S. of Niiinantla. THERMl, in Geogrnphy, a town of Afiatic Turkey, in the province of Natolia ; 24 miles N. of Burfa. THERMIA, an illand in the Grecian Archipelago, fo called from its abounding \vith hot fprings. It is not fo mountainous as fomc of the other iflands, and the foil, when well cultivated, produces very large quantities of barley, wine, and figs. The ifland alfo affords plenty of honey, wax, partridges, a great quantity of fine filk, and as much cotton as the inliabitants require for their own ufe. The Greek Chrillians in this ifland are computed at 16,000. Thermia is the fee of a bifhop, and contains fifteen or Cxteen churches, and feveral convents. On the ifland are flill vifible the ruins of two cities ; one of which, on the fouth coaft, mull have been of extraordinary fplendour. N. lat. 37° 20'. E. long. 24"^ 32'. Thermia, a town and capital of the ifland of Thermia. N. lat. 37^ 24'. E. long. 24° 26'. THERMOMETER, Thermometrum, derived from flte^io;, heat, and nslji', to meafure, an inllrument fhewing, or rather meafuring, the increafe and decreafe of the heat and cold of the air. The degree of heat, as afcertained by a thermometer, is only to be confidered in relation to the furrounding bodies, by virtue of which a body fupports the equilibrium of tem- perature, when it is in the neighbourhood of bodies equally heated : thus, if a thermometer flands at 60°, both in a vefTel of water and in another of mercury, we may infer that the water and the mercury may be mixed without any change of their temperature ; but the abfolute quantity of heat con- tained in equal weights, or in equal bulks, of any two bodies at the fame temperature, is by no means the fame. See Heat. The general principles upon which the conftrHftion and ufe of thermometers, or meafurers of heat depend, are ftated and explained under the articles Caloric, Cold, Conge- LATio.v, Freezing, Heat, &c. It will be fufficient to obfervc in this place, that the well- known and moft general effeft of heat, whether it be ob- tained by comprelfing a certain fubflance into a narrower fpace, fo that a quantity of heat may come out of it and be communicated to certain bodies, or by expanding a cer- tain fubflance into a larger fpace, fo that it may abforb a quantity of heat from furrounding bodies, and thus cool thcfe bodies, or in whatever other way it be procured, is a dilatation of bodies, or an augmentation of their bulks. The contrary effeft is produced by cold, «. e. by a diminu- tion of the free caloric. It muft, however, be obferved, that bodies of equal bulks, but of different kinds, are not expanded alike by being heated to the fame degree ; nor are the increments of bulk in the fame body always pro- portional to the quantities of heat which are communicated to It. E. gr. if a given quantity of water, by being heated to a certain degree, be increafed in bulk one cubie inch, the addition of double or treble that quantity of heat will not increafe its bulk two or three cubic inches refpeftively ; therefore the expanfions of water are not proportional to the increments of heat. The only prafticable method of meafuring the expanfions ot fluids, is by iDclofing them in certain veffels, and by mea- iunng that part of the cavity of each veffel which is occupied by the particular fluid which fills it in different temperatures. 3 T H E It is evident, that the fubflance of the velTel is alfo expanded by the heat, and of courfe its cavity is enlarged. Therefore, when we find that the bulk of the fluid is increafed, that apparent increment is only the difference between the en- larged capacity of the veflel and the increafed bulk of the fluid. For this reafon thofe veffels mufl be made of fuch fubftances as are leaft expanfible by heat. Indeed glafs is the fubflance which is univerfally ufed for fuch pur- pofes, both on account of its httle expanfibility, and of its tranfparency, bcfides its having other remarkably ufeful properties. A glafs veffel filled to a certain degree with a liquid, for the purpofe of fliewing theexpanfion of that liquid in differ- ent temperatures, or for the purpofe of fhewing the temper- ature by the correfponding expanfion of that liquid, is called a thermometer. The thermometer and thermofcope are ordinarily ac- counted the fame thing : Wolfius, however, makes a differ- ence ; but fhews, at the fame time, that what we call ther- mometers are, in reality, no more than thermofcopes. The invention of the thermometer is attributed to feveral perfons by different authors, -viz. to Sanftorio, Galileo, Father Paul, and Drebbel. The invention is afcribed to Cornelius Drebbelius of Alcmaer, about the beginning of the feventeenth century, by his countrymen Boerhaavc (Ghem. i. p. 152. 156.) and Mufchenbroeck, Introd. ad Phil. Nat. vol. ii. p. 625. Fulgenzio, in his life of Father Paul, gives him the ho- nour of the firft difcovery. Vincenzio Viviani (Vit. de I'Galil. p. 67. See too Oper. di GaUl. pref. p. 47.) fpeaks of Galileo as the inventor of thermometers. But Sanc- torio himfelf (Com. in Galen. Art. Med. p. 736 — 842. Com. in Avicen. Can. Fen. i. p. 22. 78. 219.) exprefsly affumes this invention; and Borelli (De Mot. Animal, ii. prop. 175.) and Malpighi (Oper. Pofth. p. 30.) afcribe it to him without referve. Upon which Dr. Martine remarks, that thefe Florentine academicians are not to be fufpefted of partiality in favour of one of the Patavinian fchool. But whoever was the firft inventor of this inftrument, it was very rude and imperfeft ; and as the various degrees of heat were indicated by the different contraftion or expanfion of air, it was afterwards found to be an uncertain and fometimes a deceiving meafure of heat, becaufe the bulk of air was af- fefted, not only by the difference of heat, but likewife by the variable weight of the atmofphere. There are various kinds of thermometers ; the conflruftioB, defefts, theory, &c. of which, are as follow : ConJlrufSion of the Thermometer, depending on the Rarefaflion of the Air. — This aerial thermometer, which was that firft' invented by Drebbel, confifts of a glafs tube B E ( P/ateXVl. Pneumatics, ^g. I.), connefted at one end with a large glafs ball A, and at the other end immerfed in an open veffel, or terminating in a ball D E, with a narrow orifice at D ; which veffel, or ball, contains any coloured liquor that will not eafily freeze. Aqua fortis tinged of a fine blue colour with iolution of vitriol or copper, or fpirit of wine tinged with cochineal, or Brafil wood, will anfwer this purpofe. But the ball, A, muft be firft moderately warmed, fo that a part of the air contained in it may be expelled through the orifice D ; and then the hquor preffed by the weight of the atmofphere will enter the ball D E, and rife, e. g. to the middle of the tube at C, at a mean temperature of the wea- ther ; and in this ftate the liquor by its weight, and the air included in the ball A, &c. by its elafticity, will counter- balance the weight of the atmofphere. As the furrounding air becomes vrarmer, the air in the ball and upper part of the tube, expanding by heat, will drive the liquor into the lower THERMOMETER. Jower ball, and confequently its furface will defcend ; on the contrary, as the ambient air becomes colder, that in the ball is condenfed, and the liquor prefled by the weight of the atmofphere will afcend : fo that the liquor in the tube will afcend or defcend more or lefs, according to the Rate of the air contiguous to the inllrumcnt. To the tube is affixed a fcale cf the fame length, divided upwards and downwards from the middle, C, into one hundred equal parts, by means of which the afcent and defcent of the liquor in the tube, and confequently the variations in the cold or heat of the atmofphere, may be obfervcd. It muft be acknowledged, that the expanfion of elaftic fluids affords, in fome cafes, a ted of heat, which is very convenient from its great delicacy, and becaufe a very fmall quantity of heat is fufficient to raife their temperature very confiderably. A fimilar thermometer may be conftrufted by putting a fmall quantity of mercury, not exceeding the bulk of a pea, into the tube B C {fg. 2.) thus bent in wreaths, that taking up the lefe height, it may be the more manageable and lefs liable to harm ; dividethis tube into any number of equal parts to ferve for a fcale. Here the approaches of the mercury towards the ball, A, will fliew the increafe of the degree oif heat. The reafon is the fame as in the former. The defeft of both thefe inftruments confifts in this, that they are liable to be afted on by a double caufe : for, not only a decreafe of heat, but alfo an increafe of weight of the atmofphere, will make the liquor rife in the one, and the mercury in the other ; and, on the contrary, either an in- creafe of heat, or decreafe of weight of the atmofphere, will make it defcend. In winter, for example, the hquor would rife and fink too much ; for a froft condenfing the internal air, the liquor would afcend, but as the air is heavier in frofty weather, its preflure on the liquor in the veffel D E {Jg. 1.) being in- creafed, would raife the liquor ftill higher in the tube, and thus indicate a degree of cold greater than it really is. On the other hand, if the vreather grows warm, as it does in rainy weather in winter, the air in the ball will expand, and the hquor defcend in the tube ; but as the weight of the at- mofphere is lefs in foul weather, the liquor in D E will be lefs prefled than it was, and fuffer the liquor to defcend more than it fhould do, and (hew a greater degree of warmth than that of the ambient air. The reverfe of this will happen in fum- mer : for warm weather being fair weather, and the atmo- fphere being then heavier than ufual, the liquor will be made to fland higher in the tube than it fhould do, and fhew the degree of heat to be lefs than it really is. And as in fummer, the weather becomes cold with rain ; but the weight of the atmofphere being diminifhed, the liquor will cot afcend fo far as it ought to afcend by the condenfation cvf the internal air, and therefore indicate the cold to be lefs than it really is : and when the two caufes, thus contributing to the rife and fall of the liquor, aft equally in oppofite di- reftions, the liquor would appear neither to afcend nor de- fccHd, whatever might be the changes in the temperature of the atmofphere, on account of equal correfponding varia- tions in its gravity. Befides, the air in the ball, &c. is liable to be affefted more or lefs in its elaftic quality by the vapours that detach themfclves from the included liquor according to the degree in which it is heated or cooled. For thefe and other mcafures, thermometers of this kind have been long difufed. Inftruments of this kind, when they are fubjeft to the variations of the prelTure of the atmofphere, as \ve\] as to thofe of its temperature, are properly called manometers, and require, for enabliiip us to employ tliem as thermome- ters, a comparifon with the barometer ; while, on the other hand, they may be ufed as barometers if the temperature be othcrwile afccrtaincd. They arc, however, very ufeful without this comparifon, in delicate experiments of fliort duration ; befides, the changes of the barometer are fcldom very rajnd, and they may alfo be wholly freed from the cffefts of the prcffure of the atmofphere m various ways. Bernouilli's method confifts in clofing the tube of a com- mon barometer foas to leave the column of mercury incqin- librium with the air contained in the bulb at its aftual tem- perature, and capable of indicating, by the changes of it's height and of its prcffure, any fubfcquent changes in the temperature of the air, which muft affeft both its bulk and its clafticity. (See_^j,'-. 3.) Mr. Leflie's photometer, or Difirent'talTllERMOMETER (which fee), has fome advantages which render it better than this inttrument ; but it can only be employed when the changes of the temperature can be confined only to a part of the inftrument. The elafticity of the air contained in the bulb is here counteraftcd, not by the preffure of a column of mercury, but by the elafticity of another portion of air in a fecond bulb, which is not to be expofed to the heat or cold that is to bfe examined ; and the difference of the temperatures of the tv.'o bulbs is indicated by the place of a drop of a hquid, moving freely in the tube which joins them. M. Amontons, in 1702, with a view of perfefting the aerial thermometer, contrived his univerfal thermometer. Finding that the changes produced by heat and cold in the bulk of the air were fubjeft to invincible irregularities, he fubftituted for thefe the variations produced by heat in the elaftic force of this fluid. This thermometer confifted of a long tube of glafs ( (ee^g. 4. ) open at one end, and recurved at the other end, which terminated in a ball. A certain quantity of air was compreffed into this ball by the weight of a column of mercury, and alfo by the weight of the at- mofphere. The effeft of heat on this included air was to make it fuftain a greater or lefs weight ; and this effeft was meafured by the variation of the column of mercury in the tube, correfted by that of tlie barometer, with refpeft to the changes of the weight of the external air. This inftru- ment, though much more pcrfeft than thofe in the room of which it was fubftituted by its inrentor, is neverthelefs iub- jeft to very confiderable dcfefts and inconveniences. Its length of four feet renders it unfit for a variety of experi- ments, and its conftruftion is difficult and complex : it is extremely inconvenient for carriage, as a very fmall inclina- tion of the tube would fuffer the included air to elcapc : and the friftion of the mercury in the tube, and the compreffi- bihty of the air, contribute to render the indications of this inftrument extremely uncertain. Befides, the dilatation of the air is not fo regularly proportional to its heat, nor is its dila- tation by a given heat nearly fo uniform as he fuppofed. This depends, as the abbei NoUet has fuggefted, much on its moifture ; for dry air does not expand near fo much by a given heat, as air ftored with watery particles ; which by being converted into fteam, very much nicreafe the feeniing volume of the air. For thefe and other reafons enumerated by M. de Luc, ( Recherches fur les Mod. de I'Atm. torn. i. p. 278, &c.) this inftrument was imitated by very few, and never came to be of general ufe. ConJtruSion of the Florentine Thermometer. — The acade- mifts del Cimento, about the middle of the feventeenth cen- tury, confidering the inconveniences of the air-thermome- ters above defcribed, attempted another, that (hould mca- fure heat and cold by the rarefaftion and condenfation of fpirit of wine ; though much lefs than thofe of air, and con- fequently THE to exprefs any thing that warms the body, and by others particularly for a warm fomentation, prcfcribed by Hippo- crates for removing pains in the fide, and giving eafe in pleiirifics. THERMES, in ytndent Geegraf/jy, a town of Hifpania Citerior, S. of Numantia. THERMI, in Gtogr/iphy, a town of Afiatic Turkey, in the province of Natolia ; 24 miles N. of Burfa. THERMIA, an illand in the Grecian Archipelago, fo called from its abounding with hot fprings. It is not fo mountainous as fome of the other iflands, and the foil, when well cultivated, produces very large quantities of barley, wine, and figs. The ifiand alfo affords plenty of honey, wax, partridges, a great quantity of fine filk, and as much cotton as the inhabitants require for their own ufe. The Greek Chrillians in this ifiand are computed at 16,000. Thermia is the fee of a bifhop, and contains fifteen or Cxteen churches, .nnd feveral convents. On the ifiand areftiU vifible the ruins of two cities ; one of which, on the fouth coaft, mull have been of extraordinary fplendour. N. lat. 37° 20'. E. long. 24^32'. Thermia, a town and capital of the ifland of Thermia. N. lat. 37^ 24'. E. long. 24° 26'. THERMOMETER, Thermometrum, derived from fltffjo,-, hiat, and ns^i', to mtafure, an inftrument (hewing, or rather meafuring, the increafe and decreafe of the heat and cold of the air. The degree of heat, as afcertained by a thermometer, is only to be confidered in relation to the furrounding bodies, by \-irtue of which a body fupports the equilibrium of tem- perature, when it is in the neighbourhood of bodies equally heated : thus, if a thermometer (lands at 60°, both in a veflTel of water and in another of mercury, we may infer that the water and the mercury may be mixed without any change of their temperature ; but the abfolute quantity of heat con- tained in equal weights, or in equal bulks, of any two bodies at the fame temperature, is by no means the fame. See Heat. The general principles upon which the conftruftion and ufe of thermometers, or meafurers of heat depend, are ftated and explained under the articles Calokic, Cold, Conge- LATIO.V, FilEEZlNG, HeAT, &C. It will be fufficient to obferve in this place, that the well- known and moft general efFeft of heat, whether it be ob- tained by comprefling a certain fubftance into a nan-ower fpace, fo that a quantity of heat may come out of it and be communicated to certain bodies, or by expanding a cer- tain fubdance into a larger fpace, fo that it may abforb a quantity of heat from furrounding bodies, and thus cool thefe bodies, or in whatever other way it be procured, is a dilatation of bodies, or an augmentation of their bulks. The contrary effeft is produced by cold, «. e. by a diminu- tion of the free caloric. Ilr muft, however, be obferved, that bodies of equal bulks, but of different kinds, are not expanded alike by being heated to the fame degree ; nor are the increments of bulk in the fame body always pro- portional to the quantities of heat which are communicated to It. E. gr. if a given quantity of water, by being heated to a certain degree, be increafed in bulk one cubic inch, the addition of double or treble that quantity of heat will not increafe its bulk two or three cubic inches refpeaively ; therefore the expanfions of water are not proportional to the increments of heat. The only prafticable method of meafuring the expanfions of fluids, IS by inclofing them in certain velTels, and by mea- i unng that part of the cavity of each xeM which is occupied by the particular fluid which fillsit in different temperatures. 3 T H E It is evident, that the fubftance of the vefTel is alfo expanded by the heat, and of courfe its cavity is enlarged. Therefore, when we find that the bulk of the fluid is increafed, that app;irent increment is only the difference between the en- larged capacity of the velTel and the increafed bulk of the fluid. For this reafon thofe velTels muft be made of fuch fubftances as are leaft expanfible by heat. Indeed glafs is the fubftance which is univerfally ufed for fuch pur- pofes, both on account of its httle expanfibility, and of its tranfparency, bcfides its having other remarkably ufeful properties. A glafs velTel filled to a certain degree with a liquid, for the purpofe of (liewing theexpanfion of that liquid in differ- ent temperatures, or for the purpofe of (hewing the temper- ature by the correfponding expanfion of that liquid, is called a thermomeier. The thermometer and thermofcope are ordinarily ac- counted the fame thing : Wolfius, however, makes a differ- ence ; but fliews, at the fame time, that what we call ther- mometers are, in reality, no more than thermofcopes. The invention of the thermometer is attributed to feveral perfons by different authors, •viz. to Sandlorio, Galileo, Father Paul, and Drebbel. The invention is afcribed to Cornelius Drebbelius of Alcmaer, about the beginning of the feventeenth century, by his countrymen Boerhaave (Ghem. i. p. 152. 156.) and Mufchenbroeck, Introd. ad Phil. Nat. vol. ii. p. 625. Fulgenzio, in his life of Father Paul, gives him the ho- nour of the firft difcovery. Vincenzio V'iviani (V'it. de I'Galil. p. 67. See too Oper. di Galil. pref. p. 47.) fpeaks of Galileo as the inventor of thermometers. But Sanc- torio himfelf (Com. in Galen. Art. Med. p. 736 — 842. Com. in Avicen. Can. Fen. i. p. 22. 78. 219.) exprefsly alTumes this invention ; and Borelli (De Mot. Animal, ii. prop. 175.) and Malpighi (Oper. Pofth. p. 30.) afcribe it to him without referve. Upon which Dr. Martine remarks, that thefe Florentine academicians are not to be fufpefted of partiality in favour of one of the Patavinian fchool. But whoever was the firft inventor of this inftrument, it was very rude and imperfeft ; and as the various degrees of heat were indicated by the different contraAion or expanfion of air, it was afterwards found to be an uncertain and fometimes a deceiving meafure of heat, becaufe the bulk of air was af- fected, not only by the difference of heat, but likewife by the vai-iable weight of the atmofphere. There are various kinds of thermometers ; the conftruftion, defefts, theory, &c. of which, are as follow : Conjlruciion of the Thermometer., depending on the RarefaHion of the Air. — This aerial thermometer, which was that firft invented by Drebbel, confifts of aglafstube B E (P/a/fXVI. Pneumatics, Jig. i.), connefted at one end with a large glafs ball A, and at the other end immerfed in an open v€(rei, or terminating in a ball D E, with a narrow orifice at D ; which veflTel, or ball, contains any coloured liquor that will not eafily freeze. Aqua fortis tinged of a fine blue colour with folution of vitriol or copper, or fpirit of wine tinged with cochineal, or Brafil wood, will anfwer this purpofe. But the ball, A, muft be firft moderately warmed, (b that a part of the air contained in it may be expelled through the orifice D ; and then the liquor prefTed by the weight of the atmofphere will enter the ball D E, and rife, e. g. to the middle of the tube at C, at a mean temperature of the wea- ther ; and in this ftate the liquor by its weight, and the air included in the ball A, &c. by its elafticity, will counter- balance the weight of the atmofphere. As the furrounding air becomes VTarmer, the air in the ball and upper part of the tube, expanding by heat, will drive the liquor into the lower THERMOMETER. lower ball, ;!nd confeqiiently its furface will defcend ; on the contrary, as the ambient air becomes colder, that in the ball is condenfcd, and the liquor prefTcd by the weight of the atmofphcre will afcend : fo that the liquor in the tube will afceiid or defcend more or lefs, accordinnj to the (late of the air contiguous to the inftrument. To the tube is affixed a fcale of the fame length, divided upwards and downwards from the middle, C, into one hundred equal parts, by means of which the afcent and defcent of the liquor in the tube, and confequently the variations in the cold or heat of the atmofphere, may be obfervcd. It muft be acknowledged, that the expanfion of elaftic fluids affords, in fome cafes, a teft of heat, which is very convenient from its great delicacy, and becaufe a very fmali quantity of heat is fufficient to raife their temperature very confiderably. A fimilar thermometer may be conftrufted by putting a fmall quantity of mercury, not exceeding the bulk of a pea, into the tube B C {fg. 2.) thus bent in wreaths, that taking up the left height, it may be the more manageable and lefs liable to harm ; divide this tube into any number of equal parts to ferve for a fcale. Here the approaches of the mercury tovrards the ball. A, will ftiew the increafe of the degree of heat. The reafon is the fame as in the former. The defeft of both thefe inftruments confifts in this, that they are liable to be afted on by a double caufe : for, not only a decreafe of heat, but alfo an increafe of weight of the atmofphere, will make the liquor rife in the one, and the mercury in the other ; and, on the contrary, either an in- creafe of heat, or decreafe of weight of the atmofphere, will make it defcend. In winter, for example, the liquor would rife and fink too much ; for a frofl condenfing the internal air, the liquor would afcend, but as the air is heavier in frofty weather, its prefTure on the liquor in the veffel D E {^g. 1.) being in- creafed, would raife the liquor ftiU higher in the tube, and thus indicate a degree of cold greater than it really is. On the other hand, if the weather grows warm, as it does in rainy weather in winter, the air in the ball vnll expand, and the liquor defcend in the tube ; but as the weight of the at- molphere is lefs in foul weather, the liquor in D E will be lefs preffed than it was, and fuffer the liquor to defcend more than it fhould do, and (hew a greater degree of warmth than that of the ambient air. The reverfe of this will happen in fum- mer : for warm weather being fair weather, and the atmo- fphere being then heavier than ufual, the liquor will be made to (land higher in the tube than it (hould do, and (hew the degree of heat to be lefs than it really is. And as in fummer, the weather becomes cold with rain ; but the weight of the atmofphere being diminifhed, the liquor will rot afcend fo far as it ought to afcend by the condenfation of the internal air, and therefore indicate the cold to be lefs than it really is : and when the two caufes, thus contributing to the rife and fall of the liquor, aft equally in oppofite di- reftions, the liquor would appear neither to afcend nor de- fcend, whatever might be the changes in the temperature of the atmofphere, on account of equal correfponding varia- tions in its gravity. Befides, the air in the ball, &c. is liable to be afFefted more or lefs in its elaftic quality by the vapours that detach themfelves from the included liquor according to the degree in vrhich it is heated or cooled. For thefe and other meafures, thermometers of this kind have been long difufed. Inftruments of this kind, when they are fubjeft to the variations of the prefTure of the atmofphere, as well as to thofe of its temperature, are properly called manometers, and require, for enabliiij; us to employ thcin as ihfrmomc- ters, a comparifon with the barometer ; while, on the other hand, thi-y may be ufed as barometers if the temperature be otherwife afccrtaincd. They are, however, very ufeful without this comparifon, in delicate experiments of (liort duration ; befides, the changes of the barometer are feldom very rapid, and they may alfo be wholly freed from the cffefts of the prefTure of the atmofphcre in various ways. Bernouilli's method confifts in clofing the tube of a com- mon barometer foas to leave the column of mercury in equi- librium with the air contained in the bulb at its aftual tem- perature, and capable of indicating, by the changes of it's height and of its prefTure, any fubfcquent changes in the temperature of the air, which muft affeft both its bulk and its elafticity. (See_y5io'. 3.) Mr. Leflie's photometer, or Z)!^ri'n/;fl/ Thermometer (which fee), has fome advantages which render it better than this inftrument ; but it can only be employed when the changes of the temperature can be confined only to a part of the inftrument. The elafticity of the air contained in the bulb is here counterafted, not by the prefTure of a column of mercury, but by the elafticity of another portion of air in a fecond bulb, which is not to be expofed to the heat or cold that is to bfe examined ; and the difference of the temperatures of the two bulbs is indicated by the place of a drop of a hquid, moving freely in the tube which joins them. M. Amontons, in 1 702, with a view of perfefting the aerial thermometer, contrived his univerfal thermometer. Finding that the changes produced by heat and cold in the bulk of the air were fubjeft to invincible irregularities, he fubftituted for thefe the variations produced by heat in the elaftic force of this fluid. This thermometer confifted of a long tube of glafs ( ke^g. 4. ) open at one end, and recurved at the other end, which terminated in a ball. A certain quantity of air was comprefTed into this ball by the weight of a column of mercury, and alfo by the weight of the at- mofphere. The effeft of heat on this included air was to make it fuftain a greater or lefs weight ; and this effeft was meafured by the variation of the column of merciu-y in the tube, corrcftcd by that of the barometer, with refpeft to the changes of the weight of the external air. Tiiis inftru- ment, though much more pcrfeft than thofe in the room of which it was fubftituted by its inventor, is neverthelefs fub- jeft to very confiderable dcfefts and inconveniences. Its length of four feet renders it unfit for a variety ot experi- ments, and its conftruftion is difficult and complex : it is extremely inconvenient for carriage, as a very fmall inclina- tion of the tube would fuffer the included air to efcape : and the friftion of the mercury in the tube, and the comprcffi- bihty of the air, contribute to render the indications of this inftrument extremely uncertain. Befides, the dilatation of the air is not fo regularly proportional to its heat, nor is its dila- tation by a given heat nearly fo uniform as he fuppufed. This depends, as the abbfe Nollet has fuggefted, much on its moifture ; for dry air does not expand near fo much by a given heat, as air ftored with watery particles ; which by being converted into fteam, very much nicreafe the feeming volume of the air. For thefe and other reafons enumerated by M. de Luc, (Recherches fur les Mod. de I'Atm. tom. i. p. 278, &c.) this inftrument was imitated by very few, and never came to be of general ufe. ConJ{ru8ion of the Florentine Thermometer. — The acade- mifts del Cimento, about the middle of the feventeenth cen- tury, confidering the inconveniences of the air-thermome- ters above defcribed, attempted another, that fhould mca- fure heat and cold by the rarefaftion and condenfation of fpirit of wine ; though much lefs than thofe of air, and con- fequently THERMOMETER. r«(UM«lj the »UeratijJi4 ia ttie degree of heat likely to be muili loU Ifiifiblo. The fpirit of wine was enclofed in glafs tubes, liermctically fe»le;, Fixtii Points of. \ arious methods have been propofed by various authors,' for finding a fixed point, or degree, of heat and cold, from which to reckon tlie other degrees, and adjuft the fcale ; fo that obfcrvations made at the fame or different times, in different places, might be com- pared together. For want of this, notwithftanding all the numerous regiflers of the weather, &c. that have been kept and publilhed by different authors, we are much at a lofs to determine the comparative differences of heat and cold in different countries and cHmates, and the refultof many other obfervations. If all the weathcr-glaffes in the world had been made according to one determined fcale, thefe incon- veniences and uncertainties would have been prevented ; which, indeed, are now unavoidable, and mufl ftill continue fo, till all agree to graduate their thermometers in the fame manner, or at lead deteiTnine fome fixed or unalterable points of heat, to which all the different fcalcs of thofe inftruments may be reduced. The honourable Mr. Boyle was very feniible of this inconvenience, and much laments it ; and he propofed the freezing of tiie effcntial oil of anifeeds, as a term of heat and cold that might be of ufe in making and judging of thermometers, and fo to graduate them from this point according to the proportional dilatations or contrac- tions of the included fpirits. He mentioned alfo the cold- nefs requifitc to begin the congelation of diftilled water as another fixed term that might be adopted ; for he was per- fuadcd, that among the ordinary waters, fome were apt to freeze more cafily than others. But he was deterred from profecuting this fcheme of fixing a ftandard for m>aking and graduating all thermometers in the fame way. Experi- ments, &c. on cold, in his works abridged by Shaw, vol. i. P- 579- Dr. Hallcy (Phil. Tranf. Abr. vol.ii. p. 36.) feems to have been fully apprized of the bad effefts of the indefinite method of conftructing thermometers, and wlfhed to have them adjufled to fome determined points. What he feems to prefer for this purpofe is the degree of temperature which is found in fubterranean places, where the heat in fummer and cold in winter appears to have no influence. But this degree of temperature is fhewn by Dr. Marline to be a term for the univerfal conftruCtion of thermometers, both inconvenient, as it cannot be eafily afcertained ; and a precarious one, as the difference of foils and depths may occafion a confiderable variation. Another term of heat which he thought might be of ufe in a general graduation of Ihermometers, is that of boiling fpirit of wine that has been highly reftified : but a much more convenient term of heat, though lefs infifted on by Dr. Halley, is that of boiling water. The firfl trace that occurs of the me- thod of aftually applying fixed points or terms to the ther- mometer, and of graduating it, fo that the unequal divi- fions of it might corrcfpond to equal degrees of heat, is the projca of Renaldiuus, profcfTor, of Padua, in 1694: it is thus defcribed in the Afta Erud. Lipf. " Take a flender tube, about four pabns long, with a ball faflcncd to the fame ; pour into it fpirit of wine, enough jufl to fill the" ball, when furrounded with ice, and not a drop over : in this ilate, feal the orifice of the tube hermetically, and pro- vide twelve vefTels, each capable of containing a pound of water, and fomewhat more ; and into the firfl pour eleven ounces of cold water, into the fecond ten ounces, into the third nine, &c. : this done, immerge the thermometer in the fird veffel, and pour into it one ounce of hot water, ob- ferving how high the fpirit rifes in the tube, and noting the point with unity : then remove the thermometer into the fecond velTel, into which are to be poured two ounces of hot water, and note the place the fpirit rifes to with 2. By thus proceeding till the whole pound of water is fpenl, the inflrument will be found divided into twelve parts denoting fo many terms or degrees of heat ; fo that at 2 the heat is double to that at i, at 3, triple, &c." But this method, though plaufible, Wolfius fhews, is deceitful, and is built on falfe fuppofitions ; for it takes for granted, that we have one degree of heat, by adding one ounce of hot to eleven of cold water ; two degrees, by adding two ounces to ten, &c. : it fuppofes, alfo, that a fingle degree of heat afts on the fpirit of wine in the ball with a fingle force ; a double with a double force, &c. • laftly, it fuppofes, that if the cffeft be produced in the thermometer by the heat of the ambient air, which is here produced by the hot water, the air has the fame degree of heat with the water. Soon after this projeft of Renaldinus, viz. in 1701, fir Ifaac Newton conftrufted his oil thermometer, and fixed the bafe or lowefl fixed point of his fcale at the tempera- ture of thawing fnow, and twelve at that of the human body, &c. in the manner explained under the article Oil Thermometer. M. de Luc obferves, that the fecond term of his fcale fhould have been at a greater diftance from the firft, and that the heat of boiling water would have anfwered this purpofe better than that of the human body. In 1702, M. Amontons contrived his aniwr/a/ thermome- ter, the fcale of which was graduated in the following man- ner. He chofe for the firfl term the weight that counter- balanced the air included in his thermometer, when it was heated by boiling water : and in this ftate he fo adjufled the quantity of mercury contained in it, till the fum of its height in the tube, and of its height in the barometer at the moment of obfervation, was equal to feventy-three inches. Fixing this number at the point to which the mercury in the tube rofe by plunging it into boiling water, it is evident, that, if the barometer at this time was twenty- eight inches, the height of the column of mercury in the thermometer above the level of that in the ball was forty- five inches ; but if the height of the barometer was lefs by a certain quantity, the column of the thermometer ought to be greater by the fame quantity, and reciprocally. He formed his fcale on the fuppofition that the weight of the atmofphere was always equal to that of a column of mercury of twenty-eight inches, and divided it into inches from the point 73 downwards, marking the divi- lions with 72, 71, 70, &c. and he fubdivided the inches into lines. But as the weight of the atmofphere is variable, the ba- rometer mufl be obfervcd at the fame time with the thermo- meter, that the number indicated by this lafl inflrument may be properly corrected, by adding or fubtradling the quantity of which the mercury is below or above twenty- eight inches in the barometer. In this fcale, then, the freezing point is at 51^ inches, correfponding to gr. 32 of Fahrenheit, and the heat of boiling water at 73 inches. THERMOMETER. inclien, anfwering to gr. 212 of Fahrenheit's: and thus tliey may be eafily compared together. The fixed points of Fahrenheit's thermometer, which is generally ufed in Great Britain, (as we have already ob- ferved under ^fif/Tur/'a/ Thermometer,) are the congela- tion produced by fal ammoniac and the heat of boiling water. The interval between thefe points is divided into 212 equal parts ; the firft of thefe points is marked o, 32 degrees below the freezing point, and the other 212 ; the diftance of courfe between the freezing and boiling points being 180. The reafon why Fahrenheit fixed his fcalc fo far below the water-freezing point was founded on an erro- neous hypothefis relative to the real zero or point of abfolute privation of heat ; neverthelefs it has this advantage, that the diftinftion between the pofitive and negative terms, or thofe which exprefs degrees above or below the zero, much lefs frequently occurs in any experiments, and fcarcely ever in the regifter of natural cold in temperate climates, by which many accidental errors are avoided. Reaumur, in his thermometer, the conftruftion of which he pubhflied in 1 730, and which is generally ufed in France and other parts of the continent, begins his fcale at an artificial congelation of water in warm weather, which, as he ufes large bulbs for his glaffes, gives the freezing point much higher than it (hould be, and at boihng water he marks gr. 80, (the diftance between both points being 80,) which point Dr. Marline apprehends to be more vague and uncertain than his freezing point. The fpirit in the ihermometer, he obferves, is abfolutely incapable of fuch a great heat as Reaumur afcribed to it, and that not by a fmall or trifling difference. He finds, that highly reftified fpirit of wine cannot be heated beyond ^r. 175 in Fahrenheit's ther- mometer, while boihng water raifes the quickfilver 37 de- grees higher ; and common brandy was able to conceive a heat no greater than about ^r. 190. So far, he concludes, was Reaumur in the wrong, when he thought that all fpi- rits, weak and ftrong, immerged in boihng water, received a given degree of heat, and that equal to the heat of the furrounding water. He fuppofes his ftandard heat could take a heat only of about ^r. 180 ; lefs by 32 degrees than what he reckoned. In order to determine the correfpond- ence of his fcale with that of Fahrenheit, it is to be confi- dered that his boiling-water heat is really only the boiling heat of weakened fpirit of wine, coinciding nearly, as Dr. Martine apprehends, with Fahrenheit's gr. 180. And as his gr. loj is the conftant heat of the cave of the ob- fervatory at Paris, or Fahrenheit's gr. 53, he thence finds his freezing point, inftead of anfwering juft to gr. 32, to be fomething above gr. 34. The thermometer of M. de I'lde, of which he prefented an account to the Academy of Sciences at Peterfburg in 1733, has only one fixed point, which is the hsat of boiling water, and, contraiy to the common order, the feveral de- grees are marked downwards from this point or zero, ac- cording to the condenfations of the contained quickfilver, and confequently by numbers increafing as the heat decreafes to 150, the freezing point. In order to determine the extent of the degrees of this fcale, M. de I'llle firft weighed the empty tube, and then weighed it full of mercury ; and the difference of thefe two weights gave him that of the mercury. He then expofed the thermometer to the heat of boiling water, and took care to preferve the mercury, which this increafe of heat forced out of it ; this he accu- rately weighed, and dedufting its weight from the total weight of the mercury, he made the remainder, or that which was left in the thermometer, equal to 10000 ; he then found by calculation how many loooo parts of this refidue that forced out of tlie tube contained, and thefe parts formed the divifion* of the fcale from the point, determined by the condenfation of the mercury to the fame, point at which it ftood before it was plunged in boil- ing water, to the upper end of the tube ; and thefe divi- fions formed the extent of the degrees of M. de I'lflc's fcale. According to his llandards, the freezing point, fays Dr. Martine, is near to his ^r. I JO, correfponding to Fahrenheit's gr. 32, by which me:uis tlwy may be com- pared ; but M. Ducreli fays, that this point ought to be marked at leaft at gr. 1 54. M. Ducreft, in his fpirit thermometer, conftruftcd in 1740, made ufe of two fixed points; the firft, or o, indi- cated the temperature of the earth, and was marked on his fcale in the cave of the Royal Obfcrvatory at Paris ; and the other was the heat of boiling water, which the fpirit in his thermometer was made to endure, by leaving the upper part of the tube full of air. He divided the interval be- tween thefe points into 100 equal parts ; caUing the divi- fions upwards degrees of heat, and thofe below o degrees of cold. He afterwards regulated his thermometer by the degree of cold indicated by melting ice, which he found to be loj. In Celfius's, or the centigrade thermometer, the freezing point, like that of Reaumur's, was o, the boiling point at 100, and the diftance between both 100. See the table at the clofe of the article. The Florentine thermometers made and ufed by the members of the famous academy dd' Cimento, being fome of the firft inftruments of the fort, were vaguely graduated, fome of them having many more degrees than others ; but thofe of their moft comjmon graduation were of two forts ; in one fort the freezing point, determined by the degree at which the fpirit ftood in the ordinai-y cold of ice or fnow (probably in a thawing ftate), and coinciding with gr. 32 of Fahrenheit, fell at gr. 20 ; and in the other fort at gr. 135: and the natural heat of the vifcera of cows and deer, &c, raifed the fpirit in the latter, or lefs fort, to about gr. 40, coinciding with their fummer heat, and nearly with^gr. lo? in Ftihrenheit's, and in their other long thermometer, the fpirit, when expofed to the great midfummer heat in their country, rofe to the point at which they marked ^r. 80, The freezing point of one was 20, the boiling point 174, and the diftance between both was 154: in the other the freezing point was 13^, the boiling point 8l|, and the dif- tance 68|. In the Parifian thermometer, or the ancient thermometer of the Academy of Sciences, the freezing point was at 25, the boiling point at 239, and the diftance between both 214. In the thermometer of the obfervatory at Paris, made of fpirit of wine by M. de la Hire, the fpirit always ftands at _fr. 48, in the cave of the obfervatory, correfponding to gr. ^^ in Fahrenheit's; and his gr. 28 correfponded with 5 1 inches fix lines in Amontons's thermometer, and con- fequently with the freezing point, or gr. 32 of Faliren- heit's. This thermometer of De la Hire, which ftood in the obfervatory of Paris above 60 years, feems to have been graduated thus ; the freezing point 28, the boiling point 1 99 J, and the diftance between both 171-I. In Amon- tons's thermometer the freezing point was 51^, the boiling point 73, and the diftance between them 2ii. In the thermometer of Poleni, made after the manner of Amontons's, but with lefs mercury, 47 inches corre- fponded, according to Dr. Marfine, with 5 1 in that of Amontons's, and 53 with 59^. It was graduated thus ; the freezing point at 47-nj> the boiling point at 62,%, and 382 th? THERMO METER. l!,f ililluico btlwffii thcin i5,-o- J'> Crucquius's, the tVi-c/ing point was 1070, the boiling point 15 10, and the ilitbncc 44c. r L D 1 c III the aiai.-nt ftandard thrrmometer of the Royal bo- cielv, after which thermometers were for a long time con- llruded in England, Dr. Martin<; found that gr. 34^, an- fwered to gr. 64 in Fahrenheit's, and gr. o to 89 or 88. From that point the numeration afccnded and dcfcendeil tbuj; the freezing point was 73^, t!ie boiling point 141^, and the diftance between them 2i5i. In iir liaac New- ion's, the freezing point was o, the boiling point 34, and the diftance 34. In the thermometers graduated for adjufting the degi-ees of heat proper for exotic plant?, &c. in lloves and green houfes, the middle temperature of the air is marked at gr. o, and the degrees of heat and cold are numbered both above and bdow. Many of thefe are made on no regular and fixed principles. But in that formerly much uled, called Fowler's regulator, the fpirit fell, in melting fnow, to about gr. 34 under o ; and Dr. Martine found, that his gr. 16 above o, coincided willi nearly gr. 64 of Fahrenheit. His o feenis to have coincided with about the 53d or 54th degree of Fahrenheit's, and from that point the- numeration afcended and dcfcended thus ; the freezing point 34, the boiling point 250J, and the diftance between them 2844. Dr. Hales (Statical EiTays, vol. i. p. 5S.) in his thermo- meter made witli fpirit of wine, and ufed in experiments on vegetation, began his fcale with tho loweft degree of freezing, or gr. 32 of Fahrenheit, and carried it up to gr. too, which he marked where the fpirit llood when the ball was heated in hot water, o!i which wax fwimming tirft began to coagulate, and this point Dr. Martine found to correfpond with gr, 142 of Fahrenheit, But by expe- rience Hales's or. ico falls confiderably above our gr. 142. According to others, his freezing point was o, his boiling point was 163, and the diftance of courfe 163. In the Edinburgh thermometer, made with fpirit of wine, and ufed in the meteorological obfervations pub- li(hid in the Medical EtTays, the fcale is divided into inches and tenths. In melting fnow the fpirit Hood at X,',, and the heat of the human (kin raifed to 22 '5. Dr. Martine found, that the heat of the perfon who graduated it was _fr. 97 of Fahrenheit. It feems to have been gra- duated thus; the freezing point 8;, the boiling point 47, and the diftance between them 3Sj. As it is often of ufe to compare different thermometers, ill order to judge of the refult of former obfervations, we have annexed from Dr. Maitine's Effays, the table by which lie compared fifteen different thermometers. See PlateXVl. Pneumatics, Jig. 4. See alfo the table at the clofe of this article. There is a thermometer which was formerly much ttfed in London, called the thermometer of Lyons, becaufe M. Criftin brought it there into ufe, which is made of mer- cury : the freezing point is marked gr. o, and the inter- val from that point to the heat of boiling water is divided into 100 equal degrees. From the above abftraft of the hiftory of the conftruc- lion of thermometers, it appears that freezing and boiling water have furnifhed the diftinguithing points that have been marked upon almoft all thermometers. The inferior fixed point is that of freezing, which fome have determined by llie freezing of water, and others by the melting of iLc ; ajid though the difFcrer.ce between thefe two tempera- tures is not commonly very confidcrable, yet it is not \n- vai-iable. * • It is now well known, that all, or almoft all bodies, by changing from a fluid to a folid ftate, or from the ftate of an elaftic to that of an unelaftic fluid, generate heat ; and that cold is produced by the contrary procefs. In order to obtain this fixed point or limit, melting ice, or ice powdered and mixed with water, will produce the fanu' temperature. And thoiigii there may be fome trifling dif- ference between the temperature of ice difpofed to melt, ai.d that of melted ice or the water produced by it ; this differ- ence, however, has no fenfible cffefl on the thermometer ; confequently, the temperature of water fucceflively produced by ice, and accumulated in its intcrftices, or from powdered ice mixed with the water which is produced by it in melting, affords, as De Luc obfervcs, a fixed point, which is eafily obtained, and which fhould be adopted in the conftrudlion of all thermometers. The fuperior fixed point of almoft all thermometers, i» the heat of boiling water ; but this point cannot be confi- dered as fixed, unlefs the heat be produced by the fame de- gree of boiling, and under tlic fame weight of the atmo- ipherc. With regard to the firft circumftance, it is obferved, that water, when it begins to boil, has not attained to its greateft degree of heat, which is known by its bubbling or foaming from the bottom of the veffel, and over the whole furface of the water, with the greateft violence which it is capable of acquiring ; and in this ftate the water difcovers an augmentation of heat more than one degree above the heat it had when it began to boil. The temperature of water which boils with vehemence (hould, therefore, be the ftandard of the fixed point of thermometers : neverthelefs it is to be confidered farther, that this degree of heat with which water violently boils, is invariably the fame, only un- der a given prefTure of the atraofphere ; but if the preflure be diminifned or increafed, the boihng heat is diminifhed or increafed. It is well known that water, placed under the exhaufted receiver of an air-pump, will be converted into fteam with a degree of heat far inferior to that which is ne- cefTary to its boiling in the open air ; and under the preflure of its own vapour, confined in Papin's digefter, it is faid to fuftain a degree of heat, without boiling, far exceeding that which, in the open air, would convert it into fteam. Hence it follows that, in climates where the preiTure of the at»io- fphere is liable to confidcrab'.e change, the heat of boihng water, in open air, will be different at different times. Con- fequently thermometers, made in different ftates of the ba- rometer, will difagrcc ; unlefs allowance has been made for the effe;er, into eighty equal pnrlj ; and by a great number of ex- periments THERMOMETEil. pentnciils on the heat of boihng water, at different heights above the level of the fea, he hath found, that the height of I'.is thermometer, plunged in boiling water, may be exprefTed, i:-. all flates of the barometer, by the following formula, -vix. — — — log:. V — a =; T : in which y denotes the height of 200000 ^ -^ -^ " th? barometer in fixteenths of a Parifian line, T the height of a thermometer, plunged in boiling water, above melting ice, in hundredths of a degree of his fcale ; and a the con- ilant number 10387. By logarithms he always means the tabular or Briggian logarithms, and confiders the feven figures given by the tables, befides the index, as integral figures, ;'. e. he con- f.ders tlie eighth figure of the logarithm as Handing in the place of units. But as it is more ufual with mathemati- cians, aud, in general, more convenient, to coiifider all the figures after tiie index as decimals, the number which M. do Luc exprefles by — ~ — log. y, would in that cafe be 200000 99 X loo log- Ji ; Of 99 X 50 log. y. However, in the fequel, M. de Luc's notation is retained. Now if care were taken by the above formula, or in any other way, to adjuft the boiling point to the main height of the barometer in every country, the inftruments of the fame country would always be confiftent ; but thofe of different countries would ftill difagree ; that is, they would exprefs the fame temperature differently, though tlieir fimilar intervals ftould be fimilai-ly divided ; for in every fcale, the number of degrees above or below melting ice, by which any given temperature is expreffed, will be as the value of each degjree inverfely ; that is, if each be a given part of the fundamen- tal interval, as the value of the fundamental interval in- Terlely ; but if the degrees of different fcales be different parts of the fundamental intervals, as the value of the fun- damental interval inverfely, and the number of degrees con- tained in it diredtly. In order, therefore, to compare the thermometers of dif- ferent countries, the proportions of their fundamental inter- vals to each other mull be afcertained, or we rauft have fome means of finding, upon one fcale, the place of the boiling point of another. For this piirpofe, a general folution is re- de Luc's relearches ; and his formula, above given, is re- duced to Englifli meafurcs, and adapted to Engliili in- ftruments, by Dr. Horfley. As the fubjeft is curious and important, we Ihall fubjoin the proeefs he has pur- fued for tliis purpofe. It is but feldom that the baro- meter in this country flar.ds fo low as 27 Paris inches. Its main height upon the plain country about London is near 30 EngUfli inches. It may, tlicretore, be proper for the London workmen to fix their boiling point when the barometer is at 30 inches. Fahrenheit's divifion of the fcale, which makes 180 degrees between melting ice and boiling water, and places the point o at the 3 2d degree below melting ice, may be retained : and the thermometer thus ccnftrufted is called by Dr. Horfley, Bird's P'ahrenheit, bccaufe Mr. Bird, he apprehends, is the firfl; workman who took the pains to attend to the ftate of the barometer in making thermo- meters, and has always fixed the boiling point when his ba- rometer has ilood at 30 inches. T, then, being pv.t f^^r the height of a thermometer 7 plunged in boihng water, above nicltuig ict, in lo&dllio ol a degree of De Luc's fcale, in any given ftate of the baro- meter ; let fe> denote the fame height in loodths of a dcgrte oi Bird's Fahrenheit ; put y for the height of the barome- ter, in i6ths of a Paris line ; -u, for its height in Paris fines ; .r, in loths of a Paris inch ; 2, in loths of an Eng- hlh inch ; and for 10387 put a ; for 16, 6 ; for 10, c ; for 12, d; and let E :md F reprefcnt numbers expreifing the proportion of the Englilli foot to the French foot. M. dc Luc hath found that, whatever be the value ot y. 99 ■log. a ■■ T. But log. y = log. V + log. i ; 200000 and log. V = log. x + log. d — log. c ; and log. w = log. « + log. E — log. F ; therefore log. y = log. z + log. 99 E + Jog. J + log. 1/ ■ log-. F — log. c ; and — — — log. ^ ^ 200000 ^ 99 + i^ooSS ^°S- ^ + ^°S- '^ + ^°^- ^ - ^°^' ^ log. But F — log. c — a = to the Engliflt as 2. 13 15 to 2 - 4171-55 = T; and 99 : z'SS^ ^°S- E + log. J + log. 6 - log. = — 4171.55; the French foot being Therefore - — — — log. c 200000 99 20000000 log. 41.7155 = = the height of the thermometer, plunged in boiling water, above melting ice, in degrees of De Luc's fcale, when the height of the barometer in tenths of an EagliOi T inch, is z. For a write 300 : then = 80.002 ; which -^ 100 ' is therefore the height of the thermometer, in boiling water, above melting ice, in degrees of De Luc's fcale, when the barometer is at 30 inches Enghfli. And in the fame ftate of tlie barometer, the height of the thermometer plunged in boiling W3ter, above melting ice, in degrees of Bird's Fah- renheit, or , is 1 80. Hence the numbers T and © too are in the conftant proportion of 809 and 1 800, whatever be the value of z. For the change produced in the heat of boiling water, by any change of z, being always the fame for both thermometers, the temperature expreffed by T in parts of one fcale is always the fame, as 0 ex. preffes in parts of the other ; and therefore putting - - and — for the values of the loodthpart of a degree of tlie T icales of De Luc and Bird refpeftively, the fraftions — , ^ are always equal, and T, Q are m the conftant propor- tion of the invariable numbers L, B : confequently, when the proportion of T and 0 is determined for any particular value of », it is found generally for all : confequently T : 0 :: 8co : 1800. And T = -„-'- 0 = — ^- e very nearly IBCO 2000 in air values 01 -.; : and fubftituting this val jc for T in the equation THERMOMETER. for the relation between % and ©, 99 equttion exhibiting the relation between % and T, we hare, log. « — log. z - made by fir George Shuclcburgh {ubi fupra) compared with the refult of M. de Luc's rules. 20000000 4'-7'5S = 899 99 92.804 = loooo X 899 = the height of the thermometer in boiling 2000 X ICX) e ICXD water, above melting ice, in degrees of Bird's Fahrenheit, when the height of the barometer in tenths of an Englilh inch, is -i. And thus M. de Luc's formula, for the varia- tion of the boiling point, is adapted to Englifli inftrumciUs, and reduced to Engliih meafures of length. For s write 287.7525, the length of 27 French inches m tenths of an Engliih inch, and , the height of De Luc's ° too boiling point above melting ice, in degrees of Bird's Fahren- heit, comes out 177.989. Hence M. de Luc's boiUng pouit falls upon 209.989 of Bird's fcale, i. e. upon 210 very nearly, or infenfibly more than two degrees below Bird's pouit of boiling. But as 899 is a troublefome divifor, the computation will be more eafy and expeditious, by wntmg for — 5-^— log. s, i. Then s -(- — - s - 92.804 = lOOOOOO 900 very nearly. Upon thefe principles Dr. Horfley has 100 computed the table following, for finding the heights to which a good Bird's Fahrenheit will rife, when plunged in boiling water, in all dates of the barometer, from 27 to 31 Englifh inches ; which will ferve, among other ufes, to direft inftrument-makers in making a true allowance for the effeft of the variation of the barometer, if they are obliged to finifh a' thermometer, when the barometer is above or below 30 inches ; though it is beft to fix the boiling point when the barometer is at the height prefcribed. Equation of the Boiling Point. Barometer. Equation. Difference. 31.0 30-5 30.0 29.5 29.0 28.5 28.0 27-S 27.0 + I-S7 + 0.79 0.00 - 0.80 - 1.62 - 2.45 -3-3' - 4.16 - 5-04 0.78 0.79 0.80 0.82 0.83 0.85 0.86 0.88 The nombers in the firft column of this table exprefs heights of the quickfilver in the barometer in Englifli inches and decimal parts : the fecond column (hews the equation to be apphed, according to the fign prefixed, to 212" of Bird's Fahrenheit to find the true boiling point for every fuch ftate of the barometer. The boiling point for aD intermediate dates of the barometer may be had with fufBcient accuracy by taking proportional parts, by means of the third column of differences of the equations. ( See Phil. Tranf. vol. Ixiv. part i. art. 30. See alfo an excellent paper on this fubjeft by Dr. Mafkelyne, in the Phil. Tranf. vol. Ixiv. parti, art. 20.) In the following table wc have the refult of fifteen different obfervations Heiplii of the Baiomeier re- Mean Boiling Boiling Point (iuceii to the Point by Ob- bj ne Luc"s fame Tun |)era- fervation. Rules. ture of 50". Inch. Deg. Deg. 26.498 207.07 208.54 27.241 208.64 208.84 27.954 209.87 210.03 28.377 210.50 210.81 28.699 211. 27 211.34 28.898 211.50 211.67 28.999 21 1.60 211.85 29.447 212.55 212.74 29.805 212.95 213.15 30.008 213.22 213-47 30.207 213.58 213.79 30.489 214.15 214.23 30-763 214-37 214.66 30.847 214.83 214.79 30-957 214.96 214.96 Sir George Shuckburgh has alfo fubjoined the follow- ing general table for the ufe of artids in condrufting the thermometer, both according to his own obfervations, and thofe of M. de Luc. Height of ( oirecl.of the Corrcift. accord. 1 Ditfereiicc, tbeBarom. Bi)iling Point. to M. de Luc. Inch. . Deg. Dc^. 26.0 - 7.09 •91 .91 .90 .89 .89 .87 .87 .85 .85 .84 - 6.83 .90 .89 .88 26.5 - 6.18 - 5-93 27.0 - 5-27 - 5-04 27-5 - 4-37 — 4.16 .87 .86 28.0 - 3-48 - 3-31 28.5 29.0 29.5 - 2.59 - 1.72 - 0.85 - 2.45 - 1.62 - 0.80 •83 .82 .80 30.0 0.00 0.00 •79 .78 30-5 -1- 0.85 + 0.79 31.0 + 1.69 + 1-57 The Royal Society, fully apprized of the importance of adjuding the fixed points of thermometers, appointed a committee of feven gentlemen to confider of the beft method for this purpofe ; and their report is pubhlhed in the Phil. Tranf. vol. Ixvii. part ii. art. 37. From a variety of expe- riments and obfervations, relating to this fubjetft, the com- mittee have deduced the following pratftical rules, which they recommend in adjuding the fixed points of ther- mometers. The mod accurate way of adjuding the toiling point is, not to dip the thermometer into the water, but to expofe it only to the fteam, in a veffel clofed up in the manner reprefented in Plate XVL Pneumatics, ^g^ 6. where A B i a is the veffel containing the boiling water, D d the cover, E a chimney made in the cover intended to carry off the deam, and M m the thermometer paffed through a hole in the cover. In the purfuit of this method the fol- lowing particulars muft be regarded : the boiling point mud be adjufted when the barometer is at 29.8 inches ; unlefs the operator correfts the obferved point in the manner THERMOMETER. ttianner direfted in the fequel of this article. The hall of the thermometer muft be placed at fuch a depth within the pot, that the boiUng point may rife very little above the cover ; and the furface of the water in the pot fhould be at lead one or two inches below the bottom of the ball. Care muft be taken to ftop up the hole in the cover through which the tube is inferted, and to make the cover fit pretty clofe, fo that no air fliall enter into the pot that way, and that not much iteam may efcape. A piece of thin flat tin- plate mull alfo be laid on the mouth of the chimney, fo as to leave no more paflage than what is fufBcient to carry off the fteam. If the artift pleafes, he may tie each corner of tliis plate by a ftring to prongs fixed to the chimney, and Handing on a level with the plate, as it will be thus always kept in its place. Fig. 7. is a perfpcftive view of the chimney and tin- plate ; A B C D is the plate, E the chimney, F/, G g, M m, and N n, the prongs fallened to the chimney, to which the four corners of the plate are to be tied by the firings A F, B G, CM, and D N ; the ends F, G, M, and N, of the prongs muft be on a level with the plate, and the ftrings (hould not be ftretched tight. The cliimney ought not to be lefs than half a fquare inch in area, and not lefs than two or three inches in length. The cover fhould be made to take on and off eafdy, and a ring (>f woollen cloth may be placed under it, fo as to lie between it and the top of the pot. The hole in the cover may be ftopped up by a cork, with a hole bored thi-ough it, big enough to receive the tube, and then cut into two, parallel to the length of the hole. Another method, more convenient in ufe, but not fo eafdy made, is reprefei'iUd in Jig. 8. which exhibits a pcrfpcftive view of the apparatus : A a is the cover, H the hole through which the thermometer is pafled, Bis. flat piece of i.rafs fixed upon the cover, and D ^/ E f a fliding piece of brafs, made fo as either to cover the hole H, or to leave it uncovered, as in the figure, and to be tightened in either pofition by the fcrew ,1 fliding in the flit Mm; alfo in the edge D (/, to enclofc . the tube of the thermometer : pieces of woollen cloth fliould alfo be faftened to the edges B I and D i/, and alfo to the bottom of the fliding-piece T)dlLe, unlefs that piece and the cover are made fufficiently flat to prevent the efcape of the fteam. In order to keep the thermometer fufpended at the proper height, a clip may be ufed like that reprefented in Jig. 9. which, by the fcrew J-, muft be made to embrace the tube tightly, and may reft on the cover. Another method, which is rather more convenient, when the top of the tube of the thermometer is bent into a right angle, in the manner often praftifed at prefent for the fake of more conveniently fixing it to the fcale, is reprefented in fig. 10. : GgT'f is a plate of brafs ftanding perpendicu- larly on the cover, and L/ N?j a piece of brsls bent at the bottom into the form of a loop, with a notch in it, fo as to receive the tube of the thermometer, and to fuffer the bent part to reft on the bottom of the loop ; this piece muft flide in a flit Ki, in the plate L /Nn, and be tightened at any height by the fcrew T. Moreover, it is beft to make the water boil pretty briflily, as otherwife the thermometer is apt to be a great while before it acquires its full heat, efpecially if the veffel is very deep ; and the obferver fhould wait at leaft one or two minutes after the thermometer appears to be ftationary, before he concludes that it has acquired its full height. Another way of adjufting the boiling point is to try it in a veflel of the fame kind as the former, only with the water J2 rifing a little way, viz. from one to three or four inehes above the ball, taking cai-e that the boihng point fliall rife very little above the cover. In this method there is no need to cover the cliimney with the tin-plate, and there is lefs need to make the cover fit clofe, uuIefs to prevent the operator from being incommoded with the fteam. The height of the barometer in this method is 29-0 inches. It will be convenient to have two or three pots of dif- ferent depths for adjufting thermometers of different lengths. A third way of adjufting the boiling point is to wrap feveral folds of linen rags or flannel round the tube of the thermometer, and to try it in an open veffel, taking care to pour boiling water on the rags, in order to keep the quickfilver in the tube as nearly of the lieat of boihng water as pofTible. In this method the barometer ftiould be at 29.8 inches ; the water fliould boil faft, and the thermometer fliould be held upright, with its ball two or three inches under water, and in that part of the veffel where the current of water afcends. Whichever of tliefe methods of adjufting the boiling point is ufed, it is not neceffary to wait till the barometer is at the proper height, provided the operator will take care to correft the obferved height according to the following table. Height of the Barome- Height of the Barorae- ter when I Point is at cording le Uniliiij; jufted ac- to the Corre£\ioii in lOOOdths of the Inter- val hetween ler when the Boiling IVinl is adjufted ac- cording to ilie Corroflion in lOOOdlhs of liie Interval between 3*2® 1ft or 3d 2<1 Me- .32°and21';° 1ft or 3d 2d Me- and 2 1 2°. Method. thod. Method. thod. 30.60 53 10" 9 29.69 58 29-39 28 2 30-71 59 48 37 4> 29 18 07 8 7 6 5 0 r ^ 47 36 25 14 17 06 28.95 84 3 4 25 14 95 84 4 3 ^ 03 28.92 73 62 7 8 •" 03 73 2 81 5' 9 29.91 61 I 70 10 80 50 o_ 59 1 1 J In ufing this table, feek the height of the barometer in the column anfwering to the method of adjufting the boil- ing point, the correfponding number in the third column fliews how much the point of 212° muft be placed above or below the obferved point : e. gr. fuppofe the boiling point to be adjufted in them when the barometer is at 29 inches, and that the interval between the boiling and freezing points is I I inches ; the nearefl number to 29 in the left-hand column is 29.03, and the correfponding number in the table is 7 higher, and therefore the mark of 212° muft be placed higher than the obferved point by ^^g'^^ths of the interval II X 7 between boiling and freezing, i. e. by , or .077 of an inch. This method of correfting the boiling point is not ftriftly juft, unlefs the tube is of an equal bore in all its parts ; but the tube is feldom fo unequal as to caufe any fenfible error, where the wliole correftiou isfo fmall. The trouble of making the correftion will be abridged by a diagonal fcale, fuch as is reprefented in_yfj. 10. Although it is of no great confequence what kind of water is ufed in adjufting the boiling point, fo that it is not fait. TIIERMOMETEK. r It, or. iJ" it bf I'.ard, tliat it mould be kept boiling at lead lA, minutes befurc it is ufed ; yet the committee recom- mend, for the adjuftment of thcrmoneters mtended for nice experiments, to employ rain or diftilled water, and to per- form the operation in (leai.i. , , r It is obierved, that though the boiling point be placed lo much higher on fomc of the thcrmomelcrs now made than on other?, vet this does not produce any confiderable error in the obfe'rvations of the weather, at leaft in this climate ; L>T an error of ih" in the pofition of the boiling point, will make au error oii'ly of iialf a degree in the pofition of 92", and of not more tiian a quarter of a degree in the point of 62°. • ,. . f It is only in nice experiments, or in trying the heat ot hot liquors, that this error in the boiling point can be of much fignification. In adjufting the freezing, as well as the boibng point, the quickfilver in the tube ought to be kept of the lame heat as that in the ball. When the freezing point is placed at a confiderable diftance from the ball, the pounded ice (hould be piled to fuch a height above the ball, that th» error which can arife from the quickfilver in the remaining pait of the tube, not being heated equally with that in the ball, fhall be very fmall, or the obferved point muft be conefted on that account, according to the following table. Heat of the Air. Correc\ion. 42' .OC087 5^ .00174 62 .00261 72 .00348 82 .00435 The correftion in this table is expreffed in 1 000th parts of the diftance between the freezing point and the furface of the ice : e. g. if the freezing point ftands feven inches above the furface of the ice, and the heat of the room is 6z^, the point of 32° (hould be placed 7 x .00261, or .018 of an inch lower than the obferved point. A diagonal fcale will facilitate this correftion. The committee obferve, that in trying the heat of liquors, care (hould be taken that the quickfilver in the tube of the thermometer be heated to the fame degree as that in the ball ; or if this cannot be done conveniently, the obferved heat (hould be correfted on that account ; for the manner of doing which, and a table calculated for this purpofe, wc muft refer to their excellent report in the Phil. Tranf. vol. Ixvii. part ii. art. 37. Several experiments made by governor Hutchins, at Albany Fort, in Hudfon's Bay, in 1782, in purfuancc of a method fuggefted by Dr. Black and Mr. Cavendifli, and for wliich he obtained fir Godfrey Copley's medal from the Royal Society in 1783, have not only confirmed the ob- fervations before made, relative to the folid ftate into which quickfilver can be brought by cold, its metalline fplendour and polilh when fmooth, its roughnefs and cryftallization where the furface was unconfined, its malleabihty, foftnefs, and dull found when ftruck ; but have alfo clearly demon- (Irated, that its point of congelation is no lower than — 40°, or rather - 39°, of Fahrenheit's fcale ; that it will bear, however, to be cooled a few degrees below that point, to which it jumps up again on beginning to congeal ; and that its rapid defcent in a thermometer, through many hundred of degrees, when it has once paffed the above-mentioned limit, proceeds merely from ite great contraction in the aft of freezing. See Phil. Tranl. vol. Ixxiii. pari ii. art. •20, 20, 21. Tur.RMOMETERS, Obfcrvat'wns en the Conjliiidion of. It is abfolutely iieceflary that thofe who would derive any ad- vantage from thefe inftruments, (hould agree in ufing the fame liquor, and in determining, according to the fame method, the two fundamental points. If they agree in thefc fixed points, it is of no great importance whether they di- vide the interval between them into a greater or lefs number of equal parts. The fcale of Fahrenheit, in which the fun- damental interval between 2 1 2'^, the point of boiling water, and 32°, that of melting ice, is divided into 180 parts, (houid be retained in the northern countries, where Fahren- heit's thei-mometer is ul'ed : and the fcale, in which the fun- damental interval is divided into 80 parts, will ferve for thofe countries where the thermometer of M. de Reaumur is adopted. But no inconvenience is to be apprehended from varying the fcale for particular ufes, provided care be taken to fignify into what number of parts the fundamental interval is divided, and the point where o is placed. With regard to the choice of tubes, it is moft defirable to have them exaftly cylindric through their whole length. See Mercurial Thermometer. The capillary tubei are preferable to others, becaufe they require lefs bulbs, and they are alfo lefs brittle, and more fenfible. Thofe of the mod convenient fize for common experiments are fuch as have their internal diameter about the fourth of a line : and thofe made of thin glafs are better than others, as the rife and fall of the mercury may be more diftinftly perceived. The length of nine inches will ferve for all common cccafions ; but for particular purpofes, the length both of the tubes and of the divifions fliould bs adapted to the ufes for which they are defigned. In determining the beft fize of the balls or bulbs, it has been ufual to compare new tubes with fuch thermometer? as are well proportioned. But M. Durand has propofcd a formula for finding the proportion which the balls ought to bear to their refpedtive tubes. With this view he expreffes the length of the tube, meafured in diameters of itfelf, by a ; the whole capacity of the ball and tube by c ; the capacity of the fundamental interval, exprelfed in the iame parts with the whole capacity, ty d ; the number of degrees of the fundamental interval by m ; the number of other degrees which the fcale is to contain, befides thofe of the fundamental interval both above and below it, by n ; and the diameter of the ball meafured in diameters of the tube by b : and b = {/' a X d X in + n For two cylinders having equal bafes being as their heights, m : n :: d : — , which is m the capacity of that part of the tube which exceeds the fundamental interval, to which adding d, that inter- val, we have the total capacity of the tube d n + d dn + d, or Subtrafting this from c, we (hall have the m . , d n -Ii- d m ^ m — dm ^ d n capacity 01 the ball :::= i- — =■ . mm If this quantity be divided by the capacity of the tube, the quotient will ihew how often the capacity of the ball contains that of the tube ; and this quotient is = .• in THERMOMETER. -d, dn . Confequeiitly the ball is equal to as many dm + dn cylinders having a diameters of the tube, for their refpeftive height, and i diameter for the bafe, as are contained in this laft quotient ; and, therefore, its cylindric folidity ex- prefTed in the cyhndric fohdities of the tube will be = a x r m — dm — d n , , r . • . ., • r ; . i3ut tlie diameter of this ball is equal to dm -^ dn ^ thebafeof thecylindor in whicliit maybe iiifcribed,and the fo- hdity of thiscyhnder is equal to Jds the folidity of the circum- fcribing fphere. Confequently the folidity of this cyhiider MI . , cm — dm — dn , , ,• r wiU be = + a X -r" 1 > "Uid the diameter or dm -^^ an its bafe equal to the diameter of the ball, will be = -77 ■) / f I dm + dn sj la d y. m + n It is evident that, ceteris paribus, the larger the bulb is, in proportion to the diameter of the cavity of the tube, or tiie narrower the latter is in proportion to the former, the greater will the motion of tlic furface of the fluid be in the tube. But it mull be obferved, that when the bulb is very large, the thermometer will not eafily arrive at tlie precile temperature of any place, wherein it may be fituated. Some perfons, in order to give the bulb a greater furface, and of courfe to render it more capable of readily attaining a given temperature, have made it not globular, but cylin- drical (which ihape was adopted by Fahrenheit), or flat, or bell-like, &c. ; but thofe fliapes are improper, becaufe they are liable to be altered by the varying gravity of th^ atmo- fphere, confequently thofe thermometers cannot be ac- curate. The bulb fltould be clean and colourlefs ; fince coloured furfaces are apt to be partially heated by a ftrong light. If you take two equal thermometers, and paint the bulb of one of them black, or of any dai'k colour, and ex- pofe them both to the fun ; the mercury in that whofe bidb is painted will rife feveral degrees higher than in the other : even a ftrong day-light, independently of the diretft rays of the fun, will aflfeft them differently. The ball of the ther- mometer ftiould not be in contaft with the fubftance of the fcale, left it (hould be influenced by the temperature of that fubftance. When a proper tube and ball are procured, and their pro- portion afcertained, the next objedl which requires peculiar attention is that of fiUing the thermometer. For this pur- pofe the tubes Ihould be clean and dry, and the mercury very pure. (See Mercury and Barometer.) The mer- cury may be introduced into the tube by means of a kind of refervoir fixed at th^.top of it, and pr,oportioned in fize to the bulk of the ball, oi Sy rolling upon the tube a (lip of fine paper, about two or thi:* inches broad. In order to clear the tube of its air and man 'ire, it ftiould be held over a gentle fire, fo difpofed, as that i. may heat at once the whole extent of the tube, till its heat^^comes too great for the operator's hand to bear, who therel>.-e ufes a glove or nippers for this purpofe ; care being taken "hat the ball is not heated at the fame time. After the incloied air is thus rarefied, and the particles that might obftruft the free motion of the mercury are made to float in vapours within the bore of the tube, the tube is to be held upright, and the ball fud- denly heated, by which means the air contained in it will be dilated, and carry off the impurities of the tube, fo that it will be rendered clean and free from air. When the ball is heated to a coniidcrable degree, the mercury may be poured Vol. XXXV. into the refervoir fixed at the top of the tube, through a fmall corner of the paper. When the refervoir is almoft full, the ball ftiould be withdrawn from the fire, and the air will then be condenfed, and the fpace left by it will be foon occupied by the mercury. By alternately heating and cool- ing the ball, it may thus be filled with mercur\' ; but when it is nearly full, the mercury contained in it muft be made to boil, by placing it over burning coals, in order to purge it of its air. However, as a fmall quantity of air will be left in the ball after this operation, it will be expedient to re- move the mercury, which remains in the refervoir, imme- diately after the thermometer is withdrawn from the fire ; and thus the whole column, unfupplied with mercury from the refervoir, will defcend into the ball by the condenfation of that which is contained in it, and the tube being empty, the fmall bubble of air will efcape. Let the tube be again heated fucceffively through its whole length, commencing from the bottom, and preferving the heat of the ball, that the mercury may occupy it entirely, and no air be allowed to enter. During this operation, when the mercury of the thermometer begins to appear in the refervoir, let the mer- cury contained in a paper funnel be poured into it in fuch a quantity as will more than fill the thermometer, which is then to be removed from the fire. The mercury of the tube, and that diicharged from the funnel, will unite, and pafs together into the thermometer, and thus it will be wholly filled. In this ft ate it may be left for any time at pleafure, without any apprehenfion of its imbibing either air or moifture. Nothing now remains but to get rid of the fuperfluous quickfilver, and to fealthe tube. For this pur- pofe the thermometer is held in the hand and heated, till a drop of mercury falls out of it, and is then left to recover the temperature of the air ; by which means there will re- main at the top of the tube a fmall empty fpace. Then with a blow-pipe and the flame of a candle, let the end of the tube be formed into a fine point, of fuch a length as will admit of its being properly fealed. When this prepa- ratory procefs is completed, let the thermometer be gradually plunged into boiling water, fo that the fuperfluous mercury may ifl'ue from it flowly ; and when it ceafes to be dif- charged, withdraw the thermometer from the boiling water ; wipe it dry, and as foon as poflible, put the ball of it over a fmall fire, covered with afties, and previoufly prepared for the purpofe. In this part of the operation, it is neceffary to be quick, that the mercury may not have time to con- denfe, and the air enter into the tube. In this ftate the thermometer may be left to lieat, till it parts with more or fewer drops of the mercury, according to the proportion which the length of the tube bears to that of the fcale ap- plied to it. The thermometer is then fealed, by melting only the end of the point above mentioned, and at the fame inftant withdrawing it from the fire. The method of filling the thermometer with a paper tqbe, or funnel, is as follows. Let the ball be heated, fo that the mercury may rife to the top of the tube ; whilft it ap- proaches it, apply the tube of paper to the end of the tube, fo that it may ferve for a refervoir. The thermometer be- ing placed near the fire, fo that it may always preferve the fame degree of dilatation, take fome well purified mercury in a paper cornet, and communicate a little more heat to the ball. When the mercury rifes, and forms a fmall drop at the end, poQr the mercury of the cornet into the refer- voir of paper, and withdraw the ball from the fire. Hav- ing removed the paper refervoir, place the ball again over the fire, and leal the point of the tube at the moment when the mercury rifes to it, and withdraw the thermometer from the fire. This operation will be acquired by ufe. 3 T Thermo- THERMOMETER. TJiermonWtfrs that arc dofired for meafuring great de- jrrrM of hoat. require to bf fillfd with particular precau- tions, which M. de Luc has minutely dcfcribcd. When the thermometer is filled and fealcd, nOthmg more i» neceffary than to mark the two fixed points, graduate ihf fcale, and attach it to a proper frame. See de Luc's Recherches, «cc. vol. i. p. 39.^ &c. , • , r The frame may be made of any fubftance, or kmd of wood, at pleafure : and the degrees may be marked on metal or wood, or paper, or ivory, &c. ; but fuch fub- flanees (hould he preferred for the feales of thermometers as are not apt to be bent or (hortened, or otherwife altered by the weather, efpecially if the inftrumcnts are not de- fended by a glafs cafe, or by a box with a glafs face. Thermometers for indicating the temperature of the atmo- fphere need not have feales that are much extended ; if they go as high as 120° it is fufficient. The lower degrees may be carried down as low as may be neccffary for the cold of any particular climate. The mercurial thermometer need not be graduated lower than 40° below o, becaufe at about that degree mercury ceafes to be fluid. The fpirit ther- mometer mav be graduated lower, if necefiary. Thermometers ufed for obfervation, muft be fituated in the open air out of the houfi-, and at the diftance of a foot (at lead) from the wall, and where the light of the fun may not fall direftly upon them. For chemical purpofes, the bulbs and part of the tubes of the thermometers fhould projeA fomo way below the fcaU s, that they may be dipped in liquids, mixtures, &c. For other purpofes, as for bota- nical obfervations, hot-houfes, brewing manufaftories, baths, &c. the thermometers muft be m.ide longer or fhorter, or narrower ; and particular dircftions may be given with re- gard to the feales and other appendages. Great inconvenience has attended the ufe of various kinds of thermometers with different graduations. Kirwan pro- pofed to lay all thefe afide, and to conftruft a general one, beginning at the congelation of mercury, and terminating at the boiling of water, and divided into 250°. Mr. Murray of Edinburgh has fmcc fuggefted, that it would be convenient to form a fcale whofe extreme points fhould be the tem- peratures of freezing and boiling mercury, both which are now capable of being accurately afcertained, and to divide this fcale into 1000^. Thermometers, Experiments with. We fliall here in- fer! a table of fome obfervations made with the thermo- meters of Fahrenheit, Reaumur, fir Ifaac Newton, and Dr. Hales. Obferuatioru by Fahrenheit^i Thermometer. At 600 546 242 240 212 206 Mercur\- boils Oil of vitriol boils Spirit of nitre boils Lixivium tartari boils Cow's milk boils Water boils. Frefh human urine boils. According to Muf- chenbroeck, the ba- rometer being at 29 Rhinland inches. From 190 174 176 ij6 146 108 107 At to 103 Brandy boils. Alcohol boils. according to Mufchenbrceck. Serum of blood and v/hite of eggs hardens. Killing heat for animals, in a few minutes. A hen hatching eggs, but fcldom fo hot. }Heat of fl 88.75 191.75 42 52.5 126.5 14 17-5 63-5 14 17-5 0.5 70 87.5 189.5 41 51.25 124.25 13 16.25 61.25 15 18.75 -1-75 69 86.25 187.25 40 50. 122. 12 15- 59- 16 20. 4- 68 85. 185. 39 48.75 119.75 I I 13-75 5(>1S 17 21.25 6.25 67 83-75 182.75 38 47-5 117.5 10 12.5 54-5 18 22.5 8.5 66 82.5 180.5 37 46.25 115.25 9 1 1.25 52.25 ^9 23-75 10.75 6j 81.25 178.25 36 45- 113- 8 10. 50. 20 25- 13- 64 80. .76. 35 43-75 110.75 7 8-75 47-75 21 26.25 15.25 63 78.75 173-75 34 42.5 1C8.5 6 7-5 45-5 22 27-5 17-5 62 77-5 171.5 33 41.25 106.25 5 6.25 43-25 23 28.75 1975 61 76.25 169.25 32 40. 104. 4 5- 41. 24 3°- 22. 60 75- 167. 3' 38-75 101.75 3 3-75 38-75 25 31-25 24-25 59 73-75 164.75 30 37-5 99-5 2 2-5 365 26 32-5 26.5 58 72.5 162.5 29 36.25 97.25 I 1.25 34-25 27 33-75 28.75 57 71.25 160.25 28 35- 95- 0 0. 32- 28 35- 31- 56 70. 158. 27 33-75 92.75 -' -1.25 29.75 . 29 36.25 33-25 55 68.75 155-75 x6 32-5 90.5 2 2-5 27-5 30 37-5 35-5 54 67-5 '53-5 25 3J-25 88.25 3 3-75 25.25 31 38.75 37-75 53 66.25 151.25 24 30- 86. 4 5- 23- 32 40. 40. 52 65. 149. ^ ^ ^ THERMOMETER. TaSi,e for Fahrenheit's Thermometer. K«hr. 212 21 I no IO<) 208 207 206 20J 204 203 202 231 2 00 '99 tO» 197 i<)6 '95 '94 '93 192 191 190 189 188 187 186 .8y 184 '?3 182 181 180 179 .78 177 176 >75 174 173 172 171 170 169 t68 167 166 .65 164 163 162 161 160 '59 158 '57 •56 '55 «54 '53 '51 '5' 150 '49 Kcw. 80-00 79-55 79" 78.66 78.22 77-77 77-33 76.88 76.44 76.00 75-55 75.11 74.66 74.22 73-77 73-33 72.88 72.44 72.00 7'-55 71.11 70.66 70.22 69.77 69-33 68.88 68.44 68.00 67-55 67.11 66.66 66.22 6>-77 65-33 64.88 64.44 64.00 63-55 63.11 62.66 62.22 61.77 61-33 60.88 60.44 6000 59-55 j9.11 58.66 58.22 58.77 57-33 56.88 56.44. 56.00 55-55 55.11 54.66 54.22 53-77 53-33 52.88 52.44 52.00 CVni . 100.00 99-44 98.88 98-33 97-77 97.22 96.66 96.11 95-55 95.00 94.44 93.88 93-33 92.77 92.22 91.66 91.11 90.55 90.00 89.44 88.88 88.33 87-77 87.22 86.66 86.11 85-55 85.00 84-44 83.88 83-33 82.77 82.22 81.66 81.11 80.55 80.00 79-44 78.88 78.33 77-77 77.22 76.66 76.11 75-55 75.00 74-44 73.88 73-33 72.77 72.22 71.66 71. II 70.55 70.00 69.44 68.88 68.33 67.77 67.22 66.66 66.11 65-55 65.00 48 47 46 45 44 43 42 4' 40 39 38 37 36 35 34 33 32 3' 30 29 28 27 26 25 24 23 22 21 20 '9 18 17 16 15 '4 '3 12 II 10 09 08 07 06 05 04 03 02 01 00 99 98 97 96 95 94 93 92 9' 90 89 88 87 86 Rrtu. 5'-55 51.11 50.66 50.22 49-77 49-33 48.88 48-44 48.00 47-55 47.11 46.66 46.22 45-77 45-33 44.88 44-55 44.00 43-55 43-" 42.66 42.22 41-77 4'-33 40.88 40.44 40.00 39-55 39-" 38.66 38.22 37-77 37-33 36.88 36-44 36.00 35-55 35-" 34.66 34.22 33-77 33-33 32.88 32-44 32.00 3'-55 31.11 30.66 30.22 29.77 29-33 28.88 28.44 28.00 27-55 27.11 26.66 26.22 25-77 25-33 24.88 24.44 24.00 Cent. Fahr. Reaii. Cent. Falir. Reau. Cent. 64.44 85 23-55 29.44 22 4-44 5-55 63-88 84 23.11 28.88 21 4.88 6. II 63-33 83 22.66 28-33 20 5-33 6.66 62.77 82 22.22 27-77 19 5-77 7.22 62.22 81 21.77 27.22 18 6.22 7-77 61.66 80 21-33 26.66 '7 6.66 8.33 61. 1 1 79 20.88 26. 1 1 16 7. II 8.88 60.55 78 20.44 25-55 15 7-55 9-44 60.00 77 20.00 25.00 '4 8.00 10.00 59-44 76 '9-55 24.44 13 8.44 10.55 58.88 75 19.1 1 23.88 12 8.88 11.11 58-33 74 18.66 23-33 11 9-33 11.66 57-77 73 18.22 22.77 10 9-77 12.22 57.22 72 '7-77 22.22 9 10.22 12.77 56.66 71 '7-33 21.66 8 10.66 13-33 56.11 70 16.88 21.11 7 11.11 13.88 55-55 69 16.44 20.55 6 11.55 14.44 55.00 68 16.00 20.00 5 12.00 15.00 54-44 67 15-55 19-44 4 12.44 15-55 53.88 66 15.11 18.88 3 12.88 16.11 f3-33 65 14.66 '8-33 2 '3-33 16.66 52-77 64 14.22 '7-77 I 13-77 17.22 52.22 63 '3-77 17.22 0 14.22 -17-77 51.66 62 '3-33 16.66 — 1 14.66 18.33 51.11 61 12.88 16.11 2 15.11 18.88 50-5S 60 12.44 15-55 3 15-55 19.44 50.00 59 12.00 15.00 4 16.00 20.00 49.44 58 11.55 14.44 5 16.44 20.5s 48.88 57 11.11 13.88 6 16.88 21.11 48-33 56 10.66 13-33 7 17-33 21.66 48.77 55 10.22 12.77 8 17.77 22.22 47.22 54 9-77 12.22 9 18.22 22.77 46.66 53 9-33 11.66 10 18.66 23-33 46.11 52 8.88 11.11 1 1 19.11 23.88 45-55 51 8.44 10.55 12 19-55 24.44 45.00 50 8.00 10.00 13 20.00 25.00 44.44 49 7-55 9.44 14 20.44 25.55 43.88 48 7.11 8.88 15 20.88 26iH 43-33 47 6.66 8-33 16 21.33 26.66 42.77 46 6.22 7-77 17 21.77 27.22 42.22 45 5-77 7.22 18 22.22 27.77 41.66 44 5-33 6.66 19 22.66 28.33 41.11 43 4.88 6.11 20 23.11 28.88 40.55 42 4-44 5-55 21 23-55 29.44 40.00 41 4.00 5.00 22 24.00 30.00 39-44 40 3-55 4-44 23 24.44 30-55 38.88 39 3-11 3-88 24 24.88 31.11 38-33 38 2.66 3-33 25 25-33 31.66 37-77 37 2.22 2-77 26 25.77 32.22 37.22 36 1.77 2.22 27 26.22 32-77 36.66 35 '•33 1.66 28 26.66 33-33 36.1 1 34 0.88 i.ii 29 27.11 33-88 35-55 33 0.44 0.55 30 27-55 34-44 35.00 32 0. 0. 31 28.00 35.00 34-44 31 -0.44 -0.55 32 28.44 35-55 33-88 30 0.88 i.i I 33 28.88 36.11 33-33 29 I -.33 1.66 34 29-33 36.66 32.77 28 1.77 2.22 35 29.77 37.22 32.22 27 2.22 2.77 36 30.22 37-77 31.-66 26 2.66 3-33 37 30.66 38-33 31.11 25 3-" 3.88 38 31.11 38.88 30.55 24 3-55 4.44 39 31-55 39-44 30.00 23 4.00 5.00 40 32.00 40.00 THE THE Taei.e for tlie Centigrade Thermometer. Cent. Reau. Tdlir. Ce.u. K.au. Fahr. Cent. Ueau. Fdhr. Cent. Reau. Fahr. lOO 80. 212. 64 51.2 147.2 29 23.2 84.2 6 4.8 21.2 99 79.2 2 10.2 63 50.4 145.4 28 22.4 82.4 7 5.6 19.4 98 78.4 208.4 62 49.6 143.6 27 2 1.6 80.6 8 6.4 17.6 97 77.6 206.6 61 48.8 141.8 26 20.8 78.8 9 7.2 .5.8 96 76.8 204.8 60 48. 140. 25 20. 77- 10 8. 14. 95 76. 203. 59 47.2 138.2 24 19.2 75-2 11 8.8 12.2 94 75.2 201.2 58 46.4 136.4 23 18.4 73-4 12 9.6 10.4 93 74.4 199.4 57 45.6 134.6 22 17.6 71.6 '3 10.4 8.6 92 73-6 197.6 56 44.8 132.8 21 16.8 69.8 14 11.2 6.8 91 72.8 195.8 55' 44- '3'- 20 16. 68. 15 12. 5- 90 72. 194. 54 43-2 129.2 19 15.2 66.2 16 12.8 3-2 89 -1.2 192.2 53 42.4 127.4 18 14.4 64.4 17 13.6 1-4 88 70.4 190.4 52 41.6 125.6 17 13.6 62.6 18 . 14.4 - 0.4 «7 69.6 188.6 51 40.8 123.8 16 12.8 60.8 >9 15.2 2.8 86 68.8 186.8 50 40. 122. 15 12. 59- 20 16. 4- 85 68. 185. 49 39-2 120.2 14 11.2 57.2 21 16.8 5.8 . 84 67.2 183.2 48 38-4 1 18.4 «3 10.4 55-4 22 17.6 7.6 83 66.4 181.4 47 37-6 116.6 12 9.6 53-6 23 18.4 9.4 82 65.6 179.6 46 36.8 1 14.8 II 8.8 51.8 24 19.2 II. 2 81 64.8 177.8 45 36. 113- 10 8. 50. 25 20. 13- 80 64. 176. 44 35-2 1 11.2 9 7.2 48.2 26 20.8 14.8 79 68-2 174.2 43 34-4 109.4 8 6.4 46.4 27 21.6 16.6 78 62.4 172.4 42 33-6 107.6 7 5-f 44.6 28 22.4 18.4 77 61.6 170.6 41 32.8 105. 8 6 4.8 42.8 29 23.2 20..2 76 60.8 i68.8 40 32- 104. 5 4- 41. 30 24. 22. 75 60, 167. 39 31.2 102.2 4 3-2 39-2 31 24.8 23.8 7+ 1 65-. 2 38 30-4 100.4 3 2.4 37-4 32 25.6 25.6 73 V 163.4 37 29.6 98.6 2 1.6 35-6 33 26.4 27.4 72 5 -6 161.6 36 28.8 96.8 I 0.8 33-8 34 27.2 29.2 71 56.8 159.8 35 28. 95- 0 0. 32- H 28. 3'- 70 56. ,58. 34 27.2 93-2 I 0.8 30.2 36 28.8 32.8 69 ■^5.2 156.2 33 26.4 91.4 2 1.6 28.4 37 29.6 34-6 68 54.4 154.4 32 25.6 89.6 3 2.4 26.6 38 30-4 3<5-4 67 53-6 152.6 31 24.8 87.8 4 3-2 24.8 39 31.2 38.2 66 52.8 150.8 30 24. 86. 5 4- 23- 40 32- 40. 65 52. 149- THERMOPOHUM, formed of difi^o;, hoi, and wi^Xsu, J fell, a name for a fort of public houfes among tjie ancients, in which hot liquors were fold, in the manner of our cofFee- houfes. THERMOPSIS, in Botany, from fi^^po,-, a Lupine, and o4-i:, appearance or afpeS, indicating a general refemblance to that genus of plants Brown in Ait. Hort. Kew. v. 3. 3. lafs and order, Decandrla Monogynia. Nat. Ord. Papil'w- }iu Linn. Leguminof^, JufT. Ch. Calyx oblong, fire-cleft half way down, two- li ; convex behind ; tapering at ihe bale. Corolla pa- pilionaceous ; petals nearly of equal length ; llandard re- flcxed at the fides, keel obtufc. Stamens permanent. Le- gume comprefled, linear, with many feeds. Br. 1. Th. lanceolata. Sharp-leaved Thermopfis. Ait. n. i. (Podalyria lupinoides ; Willd. Sp. PI. v. 2. 504. Sophora lupinoides ; Linn. Sp. PL 534. " Pallas Aftrag. 119. t. 89.") — Leaflets oblong-ianceolate. Stipulas lanceolate, twice as long as the footftalks Flowers whorled. — Native of Siberia ; from whence the late duke of Northumberland is faid to have received it in 1776. This is a hardy peren- nial herbaceous plant, flowering in June and July, 'thejiems .ire fpreading or decumbent, about a foot long, branched in an alternate manner, round, hairy, leafy. Leaves ternate, Jight green, hairy, on Ihort ftalks ; their ktificts about an Vol. XXXV . ./ inch long. Stipulas half as large, or more. Flowers ftalked, about three in each whorl, yellow, much refembling thofe of a Lupine. Calyx hairy. By Mr. Brown's fpccific charatfter, we prefume there are more fpecies of this genus, though not in our gardens, of which he wiU one day give an account. For the foundnefs of the generic diftinftions, we rely on him. The comprefled legume leems the moft: important difference between Thermop- Jis and the Baptifia of Ventenat and Brown ; fee Ait. Hort. Kew. V. 3. 5 ; alfo our articles Sophora and Poda- lyria. THERMOPYLiE, in Aneient Geography, a ftrait or pafs, rendered famous by the valour of Leonidas and his companions, who defended it againfl; the army of Xerxes in the year 480 B.C ; and v./hich, long after that celebrated event, was defended againfl: the Gauls. This pafs is the only road by which an army can penetrate from Theflaly into Locris, Phocis, Boeotia, Attica, and the adjacent countries. The following fuccinA defcription is given of this ftrait by the abb6 Barthelemy, in his " Anacharfis." On quitting Phocis to go into Theffaly, having paffed the little country of the Locrians, we arrive, fays the abbe, at the town of Alpenus, fituated by the fea. As it ftands at the entrance of the ftrait, it has been fortified. The road at iirft is only vnde enough for the pafTage of a waggon ; but 3 y it THE it afttnvartis t-iihurges itfclf between mora(rcs formed by the waters of the lea and almoll inaceeflible rocks, which termi- nate the chain of mountains known by the name of Oeta. After leaving Alpenus, a ftone is difcovered on the left, confecrated to Hercules Melanpygiis, and a path prefents itfelf that leads to the fumniit of the mountain. Farther on, the traveller crofils a current of hot water, which gives this place in name of Thermopylx. Next to this ftream is the town of Anthela ; and in the plain which furrounds it arc a finall eminence and a temple of Ceres, in whicli the Aniphidyonj annually held one of their afTemblies. On coming out of the plain there is a road, or rather caufcway, only about feven or eight feel wide. Here the Phocians had formiTly built a wall, to proteft their country from the inroads of the Theffahans. After pafling the Phoenix, which at lail falls into the Afopus, a river that rifes in an adjacent valley, we come to the laft defile, half a plethrum ( i J or i6 yards) in breadth. The road then widens as far as Trachinia, which takes its name from the city of Trachis, that was inhabited by the Malians. This country prefents to the view of the traveller extcnfive plains watered by the Sper- chius and other rivers. To the £. of Trachis ftood the city of Heraclea, wliich did not exifl in the time of Xerxes. The whole ilrait, from the defile before we arrive at Alpenus to that which is beyond the Phoenix, may be about 48 ftadia (about 2 leagues) in length. Its breadth varies almoft at every Hep ; but through its whole extent it is (hut in on one fide by fteep mountains, and on the other by the fea, or im- penetrable moralTes. The road is often deftroyed by the torrents, or by ftagnant waters. Lconidas polled his little army near Anthela, rebuilt the wall of the Phocians, and difpatched a few advanced troops to defend the approaches. But it was not fufficient to guard the paffage at the foot of the mountain ; on the mountain itfelf there was a path, which, beginning at the plain of Trachis, terminated, after various windings, near the town of Alpenus. Leonidas entrufted the defence of this path to the thoufand Phocians he had with liim, and who took poft on the heights of mount Oeta. As foon as thefe arrangements were completed, the army of Xerxes was difcovered, fpreading itfelf over Trachinia, and covering the plain with its innumerable tents. The Greeks deliberated on the meafures proper to be adopted ; moft of the generals were for retiring to the ifthmus ; but Leonidas rejcAed this counfel. A Perfian horfeman was deputed to reconnoitre the advanced poll of the Greeks, which was oompofed of Spartans ; and as the reft of the ai-my vpas concealed from him by the wall, he only gave an account to Xerxes of the 300 men he had fcen at the entrance of the defile. After various meflfages from Xerxes to Leonidas, and the firm and calm replies of the latter, the Perfian" king was enraged, and gave ordere for an attack. The Medes ruihed on with fur)-, and one rank fell after another, while the Greeks, preffing clofe againfl each other, and covered with large bucklers, prefentcd an impenetrable front of long pikes, and a phalanx which frcdi troops fucceffively in vain attempted to break. At length the Medes were feized with a panic, and fled ; but they were fpeedily relieved by the chofcn body of the 10,000 immortals, commanded by Hy- darnes. The adion now became more bloody ; but the Greeks had the advantage of fituation, and fuperiority of arms. The Perfians loft many men ; and Xerxes, witneff- ing their flight, leaped, as it is faid, more than once from his chanot,and trembled for thcirTate. Next dav the attack was renewed, but with fo little 'fuccefs, that Xerxes def- patred of forcing the palFage. At length Epialtes, an in- habitant of thofe diftrifts, difcovered to him the fatal path by which he might turn the Grecians ; and ferved as a guide 10 T H E to Hydarnes and his corps of immortals, under whofe co';- duct they arrived near the fpot where Leonidas had poited .i detachment of his army ; and prepared to attack it. When this dreadful news reached the Greeks, their leaders aflem- bled. Some were for retreating, and others for remaining ; but Leonidas declared for himfelf and his companions, that they werS not permitted to quit a poft which Sparta had confided to their care. In the middle of the night, the Greeks, with Leonidas at their head, ilTued out of the de- file, advanced tlirough the plain, overthrew the advanced pofts, and penetrated to the tent of Xerxes, who had already taken flight. They fpread over the camp, and glutted themfelves with carnage. The Perfians were terrified and confufed, and many of them perifhed by the hands of one another. At length, with the dawn of day they difcovered the inconfi- derable number of their viftors, and rallying, attacked the Greeks on all fides. Leonidas fell beneath a ftiower of darts ; and a contcft for the honour of carrying off his body, occalioned a terrible conflicl between his companions and the moft expert and hardy warriors of the Perfian army. The Greeks, however, prevailed, and carried off their ge- neral ; and having regained the defile, pofted themfelves on an eminence, and for fome time continued to defend them- felves. When Xerxes oftered to Leonidas the empire of Greece, if he fubmitted to his power, he replied, " I rather choofe to die free than to enflave my country." When the king commanded him to furrender his anns, he wrote the laconic anfwer, " come and take them." " The Perfians are near us," faid one of his foldiers to Leonidas : " rather fay," he coolly replied, " that we are near the Perfians." See Leonidas. ' It has been a fubjeft of difpute what was the number of Grecian troops under the command of Leonidas at Ther- mopylae. Herodotus ftates them at 5100, Paufanias at 11,200, and Diodorus at 7400. The abbe Barthelemy at- tempts to reconcile thefe different ftatements, and concludes, upon the whole, that Leonidas had with him about 7000 men. If we may credit Diodorus, he had no more than 500 fol- diers when he determined to attack the Perfian camp. On the eminence to which the companions of Leonidas retired after the death of their commander, there were fe- veral monuments erefted by order of the AmphyiSlionic council, in honour of the 300 Spartans, and the other Gre- cian troops engaged in the combat. On one of thefe cippi is infcribed, " Here four thoufand Greeks of Peloponnefus fought againft three millions of Periians." THERMOSCOPE, an inftrument ftewing the changes happening in the air with refpeft to heat and cold. The word thermofcope is generally ufed indifferently with that of thermometer. There is fome difference, however, in the literal import of the two ; the firft fignifying an in- ftrument that ftiews or exhibits the changes of heat, &c. to the eye ; formed from Sicfiv,, heaf, and o-kottei', video, I fee ; and the latter an inftrument that meafures thofe changes, from St-pi, ieat, Tind jx-lftiv, to meafure, on which foundatio'n the thermometer ftiould be a more accurate thermofcope, &c. This difference the excellent Wolfius taking hold of, defcribes all the thermometers in ufe as thermofcopes ; fliewing that none of them properly meafure the changes of heat. Sec. none of them do more thjn indicate the fame. Though their different heights yefterday and to-day fliew a difference of heat ; yet, fince they do not difcover the ratio of yefterday '3 heat to to-day's, they are not ftriftly thermometers. THERONDELS, in Geography, a town of France, in the department of the Aveiron ; 3 miles N.E. of Mur. THEROUANNE, a town of France, in the depart- ment of the Straits of Calais, on tjje Lys. It was anciently the T PI £ tlie capital of the Mbrini, and afterwards an cpifcopal fce, with feveral churches and convents ; but being taken in the year 1553 by the emperor Charles V., he demolilhed it. The diltrift belonging to it, however, was ceded by Spain to France, at the treaties of the years 1559 and 1659 ; 6 miles S. of St. Oraer. THERSA, or Thapsa, in Ancient Gfography, a royal town of Judea, in the half-tribe of ManafTeh, on this fide of Jordan. Therfa was the feat, capital, and burying-place of the firll kings of Ifrael. Thersa, or Thirza, a town of Paleftine, in the tribe of Ephraim. THERSARA, a town of Afia, in the interior of Af- fyria. Ptolemy. THERSITjE, a people of Spain, in Iberia ; they were of the number of thofe whom Annibal caufed to pafs into Africa. THERUINGI, a people who inhabited a part of Dacia, on the other fide of the Danube. THESBON, a town of Paleftine, on the other fide of Jordan, in the tribe of Gad. THESEA, or TuESiEA, ©no-Eia, in Antiquity, feafts cele- brated by the Athenians in honour of Thefeus. In fpite of the important fervices that hero had done his country, in dehvering it from a fhameful tribute of fo many youths, of either fex, fent yearly to be devoured by the Mi- notaur in Crete (as the fable has it), or fent as fiaves to Minos, king of Crete, as the hiftories have it, from which he freed them, by overturning Taurus, Minos's general ; he was banifhed for fome time, and retired to Scyros, under the proteftion of Lycomedes, king of that ifland, where he finally loft his life either by accident, on in confequence of the jealoufy of the king. The gods, it is faid, revenged this treatment Thefeus received from the Athenians, by afflitling them with a fa- mine, which the oracle allured them (hould not ceafe till they had avenged his death. Upon this they flew Lycomedes, brought Tliefeus's bones to Athens, placed them in a temple erefted to him, and appointed Thefea to be held every eighth day of each month, in which largeffes were diftributed to the people, and the day was fpent, by the rich, in feafting and rejoicing, and with peculiar folemnlty on the eighth day of the month Pyanepfion. Plutarch, however, gives a different account of the origin of this feaft ; he fays that the Athenians, imagining they faw Thefeus at the battle of Marathon under the form of a tute- lary deity, confulted the oracle on this prodigy : and being ordered to colleft his bones in the ifland of Scyros, removed them with great pomp to Athens ; and depofited them under a magnificent monument erefted in the middle of the city, which became afterwards an afylum for flaves, in comme- moration of the fuccour afforded by this prince to the unfor- tunate during his life. They alfo eredled a temple where they offered facrifices, &c. At Rome, Thefeus was held in very different eftimation, for Virgil [Mn. lib. vi.) places him in Tartarus, among thofe who were tormented for their crimes. THESEUS, in Biography, a hero celebrated in the fabu- lous ages of Greece, and referred by chronologers to the thirteenth century B.C. was the illegitimate fon of iEgeus, king of Athens, by ^thra, daughter of Pittheus, king of Trcezern ; and as he advanced towards maturity difcovered a vigorous fpirit in an athletic frame. In his journey to Athens by land he met with many adventures and confliiSts, and on his arrival found the city agitated by diffeniions. The fons of Pallas, the brother of ^gous, fufpefting that the aged and childlefs fovereign would adopt this newly arrived ftranger for his heir, fomented his jealoufies, fo that T II E .^geus prepared poifon for difpatching him ; but before his plan could be accompliflied, he difcovered by certain tokens that he was his fon. The confequence of this difcovery was a revolt of the Pallantides, which Tiiefeus fuppreffed. For an account of the further exploits of Tliefeus for the relief of the Athenians, we refer to our article Hifiory of Athens. Thefeus having, in the manner there related, efta- bliflied a conftitution for the Athenians, yielded to the im- pulfe of ambition ; and quitting his throne, and fometiracs in the company of Hercules and fometlmes of Pirithous, fon of Ixion, king of Theffaly, whofe fricndfliip he had fecured, undertook a variety of enterprizes, the account of which is fo intermixed with the fabulous, that it is impoffible fatisfac- torily to develope it. He is faid, however, to have con- quered certain Amazons on the banks of the Thermodon, in Afia, taking a queen from among them for his wife ; to have affifted Pirithous in overcoming the Centaurs in Thef- faly ; and to have ftolen away from Sparta the celebrated Helen ; and afterwards to have joined the fame friend in a fimilar atteinpt upon Proferpina, the daughter of Aido- neus, king of the Moloffians, in which Pirithous loft his life, and Thefeus underwent an impriionment, from which Hercules procured his efcape. Upon his return from this romantic expedition, he found his kingdom and family in confufion. Caftor and Pollux, the brothers of Helen, ra- vaged Attica by way of revenge for the infult offered to their fifter. His queen Phaedra, falling in love with Hip- polytus, his fon by the Amazon, and being rejefted, calum- niated him to his father, and occafioned his death, as his tragedy has recorded. From a variety of circumftances that occurred, Thefeus finding that he had loft the attachment of the Athenians, abandoned the city, and intended to repair to Demetrius, fon of Minos, now reigning in Crete. In his paffage thither he was driven by a ftorm to the ifle of Scy- ros, where he was kindly received by the king, Lyco- medes ; but foon afterwards he loft his life by a fall from a rock. (See Thesea. ) The refentment of the Athenians afterwards fubfided, and they regarded him only as a hero and benefaitor ; and Cimon, fon of Miltiades, having con- veyed his bones, as they were fuppofed to be, to Athens, in confequence of the injunftions of an oracle, a magnificent temple was erefted over them, which was made an afylum for the unfortunate. Its remains ftill fubfift as one of the nobleft relics of ancient art in that famous capital. Plut. in Vit. Thefei. Anc. Univ. Hift. Travels of Anacharfis, vol. i. THESIN Per A^m and The/in. See Per Jrfm. THESIS, SiTi;, pofttion, formed from ti6d;l«i, I put or lay down, in the Schools, a general propofition, which a perfon advances, and offers to maintain. In the college it is frequent to have placards, containing a number of thefe thefes in theology, in medicine, in philo- fopliy, in law, &c. The maintaining a thefis, is a great part of the exercife a ftudent is to undergo for a degree. Thesis, in Logic, 8cc. — Every propofition may be divided into thefis and hypothefis ; thefis contains the thing af- firmed or denied, and hypothefis the conditions of the afBrm- ation or negation. Thus, in Euclid, if a triangle and parallelogram have equal bafes and altitudes (is the hypothefis), the firft is half of the fecond (the thefis). Aifis and Thefis. See Arsis. Thesis, 9to-i;, depofitio or remifjlo, the beating down the hand or foot at the beginning of a bar in raufic. See Ahsis, tollo, which is the lifting up the hand or foot in the middle or latter part of a bar. THESIUM, in Botany, an ancient name, adopted from the Greeks, enumeroted by Linnzus, Phil. Bot. 174, among 3 U 2 thofe THESIUM. tholo whofe derivation is extremely tUfficult, and, after all, doubtful. Pliny has the Thefium in two plates ; book 21. chip. 17, and book 22. chap. 22. In the former, it is mentioned amongft bulbous pl.ints, as having a harfli talle : in the latter, it ftands next to Picns, as very bitter, and purgative. This laft account is copied from Theo- phrallus, who, in his book 7. chap, n, fpeaks of fl«a-.ov in the fame terms, along with a number of plants of the Sow- thiftle and Dandelion tribe, or Cichoraccra-,/o?iop.a, in jiniiquity, a fefti- val in honour of Ceres, which was celebrated by many cities of Greece ; but efpecially the Athenians obferved it with great devotion and pomp. For the ceremonies of this folemnity, fee Potter, Archsol. Grcec. tom, i. p. 403, feq. See Cerealia and Eleusinia. THESMOTHET^, Gs^/^oO^fe, an appellation given to fix of the nine Athenian archons ; the firft and chief of the nine was called, by way of eminence, archon ; the fecond in dignity was called bafdeus ; the thhrA, poLmarchus ; and the other fix, thefmothets : for an account of whofe power and jurifdidtion, iee Potter, Archaeol. Groec. torn. i. P- 77- THESPANIS, m Ancient Geography, a river of Afiatic Sarmatia ; the mouth ot which, according to Ptolemy, lay between that of Rhembitus and the town of Azara. THESPHATA, ©sr^zla, in Antiquity, an appellation given to oracles. See Oracle. THESPIA, or Thespi.t,, in Ancient Geography, a town of Boeotia, fituated at the foot of mount Helicon, about 50 ftadia from the city of Thebes. The Thebans, who deftroycd this city, fpared nothing but the faered monu- ments, among which were the temple of Hercules, which was ferved by a prieftefs reftrifted to celibacy during her whole life, and the ftatue of that Cupid (orCupidon), fometimes confounded with the god of love, which was only a (hapelefs ftone as it was dug in the quarry, for thus the objefts of public worlliip were reprefented in ancient times. Praxiteles is faid to have formed a ftatue of Cupidon of Penthelic marble ; and Lyfippus made one of bronze. The Thefpians reported, that the ftatue of Praxiteles was taken away by Caius, the Roman emperor ; but others fay, that it was returned by Claudius, and that Nero re- moved it to Rome, where it was confumcd by fire. This ftatue was fo beautiful, that, according to Cicero, Thefpia was vifited merely for the fake of feeing it. The Cupidon that exifted in the time of Paufanias was an imitation of that of Praxiteles by Menodorus, the Athenian ; but here were a Venus and Plirync in marble, executed by Praxiteles himfelf. In one quarter of the city was a temple confe- crated to Venus Melenis. The theatre was a beautiful ftrufture, ornamented with a ftatue of Hcfiod m bronze. Near it was a Viftory in bronze, and a chapel confecrated to the Mufes, each of wliich had a fmall ftatue in marble. At Thefpia there was a ftatute of Venus in marble, made by Praxiteles. THESPIADES, in Mythology, an appellation given to the Mufes from the city of Tliefpia, where they were honoured. THESPIjE, in Ancient Geography, a town of ThefTaly, in Magnefia. THESPIANA, the name of an antidote intended for internal abfcefles. THESPIS, in Biography, an ancient poet, and the fup- pofed inventor of tragedy, was born in a fmall borough of Attica, named Icaria, and he, as well as Sufarion, a native of the fame place, appeared each at the head of a company of adlors, one on a kind of ftage and the other in a cart, Sufarion at- tacked the vices and abfurdities of his time, and reprefented his firft pieces towards the year 580 B.C. Thefpis treated nobler fubjefts, which he drew from hiftory : he appeared fome years after SufiU'ion, made his firft attempts in tragedy, and adled his Alcoftis in the year 536 B.C. He was followed in this fpecies of drama by jElchylus, Sopho- cles, and Euripides. Thefpis having obfei-ved at the fefti- vals, in which before his time hymns only were fung, one of the fingers, mounted on a table, forming a kind of dia- logue with the chorus, took the hint of introducing into his tra-gedies an aftor, who by fimple recitals, introduced at intervals, (hould relieve the chorus, divide the aftion, and render it more interefting. This innovation, together with fome other liberties in which he indulged himfelf, alarmed Solon, the legidator of Athens, who condemned a fpecies of compofition, in which the ancient traditions were dif- guifed by fiftion. " If we applaud falfehood in our public exhibitions," faid he to Thefpis, " we fliall foon find that it will infinuate itfelf into our moft faered engagement*." The exceffive approbation and delight with which both the city and country received the pieces of Theipis and Sufarion, at once juftified and rendered ufelefs the fufpicious forefight of Solon ; the poets, who till that time had only exerciled their genius in dithyrambics and licentious fatire, ' ftruck with the elegant forms which theie fpecies of com- pofition began to affume, dedicated their talents to tragedy and comedy. See Tragedy. Thefpis, according to the defcription of Horace, ex- tended his plan farther than the introduction of a fingle aftor in the intervals between the fongs of the chorus, to the reprefentation of fome fable by aiSors on a kind of moveable ftage, who alternately fung and played, with their faces ftained by the lees of wine. " Ignotum tragica; genus invenifle Camoenx Dicitur, et plauftris vcxifle poemata Thefpis, Quas canerent agerentque perundli fascibus ora." Art. Poet. Some writers have mentioned three pieces of Thefpis, viz. T H E ■vU. " The Contefl of Pclias or Phorbas ;" " The Sacred Youths •/••and " Pcntheus." Socrates lays that he repre- leutcd tragedies in the 6 ift Olympiad, long after Solon's death. TravL-lb of Anacharfifi, vol. vi. 8vo. THESPIUS, in ylncUrU Geography, a river of Greece, in Bocotia. • , . ■ j THESPROTI, a people of Epirus, who inhabited Thcfprotia, in the vicinity of the Ambraciatcs ; and formed one nation with the Chaonians. They derived their name from Thefprotus the fon of Pelafgus, who was the fon of Lyc.ion, and who was the firft that condufted the Pclafgi into Epirus. THESPROTI A, or Thesprotis, a fraall country ot Epirus, S. of Chaonia, having to tiie E. the lake Am- braciiis and Amlrracia, and to the S. the fea. This coun- try was watered by tliree rivers, which ran from \V. to E, %'it.. Thiamis, Cocytus, and Acheron. THESSALIA, Thessalv, a celebrated country of Greece. This country, comprifing Magnefia and other fmall diftr^s which have particular denominations, is bounded to the E. by the fea, to the N. by mount Olym- pus, to the W. by mount Pindus, and to the S. by mount Oeta. From thefe permanent boundaries branch out other chains of mountains and hills, that wind through the country, occafionally embracing fertile plains, which, from their form, and the manner in which they are inclofed, re- femble vaft amphitheatres. Opulent cities are feated on the heights that encircle thefe plains ; and the whole coun- try is watered by rivers faUing in general into the Peneus, which, before it lofes itfelf in the fea, flows tlu-ough the famous valley of Tempc. The Aphidanus, or Apidanus, proceeded from the S. where was Dolopia, afcended north- ward (fee Peneus), traverfed the plains of Pharfalia in the Theflaliotide, and difcharged itfelf into the Alpheus, W. of LarifTa. (See Ajidano.) The Oncheftus, or Onfchones, took its rife S. of Larifla, pafTed by the Palus Bocbeis, and after having received the Naurus, difcharged itfelf into the Pelafgic gulf, between Demetrius on the left and Pagafa; on the right. The Sperchius commenced S.W. in an angle which was formed by the chains of Pin- dus with thofe of mount Oeta, afcended N.E., watered Sperchium, turned to the E., and having pafTed Hypata, re- ceived the Achelous of Theffaly, which proceeded from mount Othrys, and being joined by the Lamina, difcharged itfelf into the Mahac or Lamiac gulf. The country was marfhy, and abounded with a variety of plants, fome of which were medicinal and fanative, and others venomous and per- nicious. The knowledge of their different properties caufed the Thetfalians to be regarded as a clafs of for- cerers, who poflcfled the art of producing fupernatural cffeAs. The principal people of Theffaly were the yEthices, fituated towards the N.W., whofe chief town was Oxinia, near a lake that lay between fmall chains of moun- tains : — the Pelagoni Tripohti, in a kind of hollow terri- tory, feparated from Macedonia by a chain of mountains, called Cambrunii montes ; denominated Tripolitans on ac- count of their three towns, Dolicha, Pythium, and Azo- rus : in the eaftem part of this territory was the Afcuris palus, or mar(h Afcuri : — the Perrhsbi, lying S. of the mountains which formed this territory, and extending from W. to E., the N. of the Peneus :—S. of the Peneus, to- wards the W., was the Eftisotis, watered by the rivers Ion and Thoeus, and bounded W. and S. by mount Pmdus : lis moft confiderable towns being Gomphi, Trica, Pel- J-nsrum, and Pharcadon :— the Pelafgiotis, towards the E., having the Peneus to the N. and commencing W. from the Apidaput, which received the Enipeus, that paffed to Phar, THE fiila : the principal towns of this part of Theffaly wero> Larifla, reckoned the capital of Theflaly ; Pharfala, one of the largefl; and molt opulent towns, now Pliarfalia, Scotufla, Crauou, &c. : — the Theflaliotis being to the S. and watered by the Enipeus in the lower part of its courfe, and having to the S. mount Othrys, and to the S.W. Dolopia ; its principal town was MeUtaea upon the Enipeus: — the Phthiolis, towards the S.E., terminating in a peninfula, and watered by the Sperchius and Achelous ; its princi- pal towns were Pherae, to the N. ; Thaumaci, to the W., commanding one of the fineft profpefts in Greece ; Alos and Lamia, towards the middle ; Phalara, at the bottom of the Amaliac gulf ; in the peninfula, Thebse, Larifl"a, Cremafl:a and Ecliinus : at the extremity the port of Aphe- tae, and S.E. Hcraclea Trachina, the road from which led to the ftraits of ThermopyU ; which fee. Magnefia was feparated from the fea by mount Pelion : here were the towns of Demetrias and lolcos, and S.E., on the eaftern coaft, the town of Magnefia, and at the extremity of the peninfula to the 8.W. the town of Antium. At the bot- tom of the Pelafgiotic gulf were the'two fmall iflands of Deu- calion and Pyrrha. Dolopia lay towards ^tolia, and con- tained no confiderable towns. The extremity of the S.E. of Magnefia was terminated by the promontory Sepias, where the fleet of Xerxes was battered by a tempefl:. The town of Gonnus, at the enti-ance of the valley of Tempe, was the key of Theffaly on the fide of Macedonia, as the poft of Thermopylae was on the fide of Phocis. See Thessalt. The feveral nations which we have recounted, as pro- perly Theffalian, were formerly governed by kings, but after various revolutions became for the moft part fubjeft to an ohgarchy. The ftates and the towns were independent of each other. The confederacy of the Theffalians, pro- perly fo called, was the moft powerful of all, both from the number of towns pertaining to it, and from the accefOon of the Magnefians and Perrhaebians which were brought almoft under complete fubjeftion. There were fome free cities, unconnefted with any of the ftates. The Theffalians could bring into the field an army of 6000 horfe and 10,000 infantry, exclufively of their archers, who were excellent, and who from their infancy were accuftomed to draw the bow. The Theffalians are faid to have been the firft who managed horfes with the bit, and ufed them in battle ; and hence, it is faid, originated tiie tradition that a race of crea- tiu-es, called centaurs, half horfe and half man, formerly exifted in Theffaly. This country produced wine, oil, and fruit of different kinds. The land has been reprefented to be fo rich, that the corn grew too faft, if it were not cut, or flieep turned in to graze upon it. They carried on a con- fiderable commerce in corn. The Theffalians, though they boafted of their liberty, were the firft to reduce Greeks to flavery. Amongft them they had a prodigious number of flaves, known by the name of Peneftae. Thefe people are very hofpitable to ftrangers, and treat them magnificently. In their drefs and houfes luxury is confpicuous ; and at their entertainments they hire dancing girls to amufe them. They are reckoned paffionate and turbulent, and very dif- ficult to be governed ; and they are reproached with infin- cerity and falfehood. They have cultivated poetry from their moft early ages, and pretend that Theffaly gave birth to Thamyris, Orpheus, Linus, and many others who lived in the heroic age ; but fince that period, they have produced no writer nor any celebrated artift. They were much ad- ditled to dancing ; and in fome places generals or magif- trates were called chiefs of the dance. Their mufic ob- ferves a medium between the Doric and Ionic, and accord- ingly hannonizefi with the charafter and manners of the 5 country. THE country. They liave never on any occafion killed ftorks, and the fame punifiiment was inflifted on a perlon who killed one of thcfc birds as if lie had taken away the life of a man. This R\v, it is faid, was founded on the circum- ftance, tliat ftorks had freed Theffaly from the enormous ferpents which formerly infefted it. THESSALICUMSedilk, the ThefTaliancliair.fo called from Theffaly, where chairs of this fignre were moft in ufe : it is recommended by Hippocrates, Lib. de Art. in place of a machine for reducing a recent luxation of the fhouldcr- bone. The back of this chair is perpendicular to the feat, as Galen tells us, by which conllruftion it is diftinguiflied, and accommodated to the operation. THESSALIOTIS. See Thessalia. THESSALON, in Geography, a river of Canada, which runs into lake Huron, N. lat. 49" 6'. W. long. 82° 8'. THESSALONIANS, Epijlles to, m Scripture Hijlory. See Episti-e. THESSALONICA, in Ancient Geography, a town of Macedonia, fituated on the Thermaic gulf; and built on the declivity of a mountain in the form of an amphitheatre, the fummit of which was defended by a caftle of great ex- tent. Strabo fays that it was named " Therma," and that it was only a village ; that CafTander augmented it confider- ably, and tranfported hither the inhabitants of fome neigh- bouring cities, and gave it the name of Theffalonica, that of his wife, the lifter of Alexander the Great. In the year 168 B.C., Macedonia was divided into four parts, and Theffalonica was the capital of the fecond part. Its go- vernment was regulated by magiftrates, called " Political." Under the Greek empire it continued to be governed by a fenate. Cicero, during his exile, paffed fome time at Thef- falonica. This city had feveral divinities, and alfo empe- rors, who were objefts of pubhc worftiip. Jupiter was the principal ; Apollo was alfo reprefented on its monuments ; and the Cabiri had a temple in Theffalonica. The Cabirian and Pyrrhic games were exhibited in this city in honour of the Cabiri, and the Olympic games were celebrated in ho- nour of Jupiter. That rich and powerful city had, for its fpeftacles and the amufement of the citizens, an amphithea- tre for the combats of gladiators, and a circus for the pub- lic games. The emperors Valerian and GaUienus gave it the title of a colony. It had alfo the title of Neocorus, The modern name of Theffalonica is Salonica or Salonihi. (which fee.) Although there are different rou-tes by which goods are tranfported from Macedonia into the Auftrian dominions, the beft, fays Dr. Holland in his Travels into Albania, &c. is through Bulgaria, by Widin and Offovo, where it enters the Auftrian territory, and is thence conti- nued through the Bannat by Temefwar, Peft, Raab to Vienna. The goods landed at Salonica are made up in packages of i^ hundred weight, and two of thefe are the load of a horfe. The cavalcades for this inland journey confift often of 200 or 300, and fometimes of 1000 horfes. The property fo tranfported, at a moderate eftimate, might be worth 30,000/. on its arrival in Germany. The time occupied between Salonica and Vienna was in general thirty -five days, excluiive of the quarantine at Offovo, which fometimes took place. The cavalcades ufually travel eight hours in the twenty-four. THESSALY, or Janna, in Geography, a province of European Turkey, bounded on the N. by Macedonia, on the E. by the Archipelago, on the S. by Livadia, and on the W. by Livadia and Epire, anciently called TheJJ'alia, Pelafgia, and Pyrrhdia, (fee Thessalia,) and now by the Turks Janna. It was fometimes annexed to Macedonia, a;nd fometimes feparated from it. The celebrated mount Vol. XXXV. THE Piiulus, now Meffova, or Meffo Novo, feparated it froni Epirus, or a part of the prefent Albania. Amongft its once celebrated twenty-four mountains, the moft remark- able are Olympus, Pelion, and Offa. Here are alfo fitn- ated the plains of Pharfalia, and the delightful valley of Tempc. The country is extremely fertile, and retains its ancient charaftcr m this refpeft. It produces oranges, ci- trons, lemons, pomegranates, very fweet grapes, excellent figs and melons, almonds, olives, cotton, and chofnnts, which take their name from Caltanea in Magncfia. The modern Theflalians are a well-made fpirited people. The moft remarkable places in the country are Lariffa and Janna. See Tkes-salia. THESTIA, in Ancient Geography, a town of Epirus, in Acarnania — Alfo, a river of the Peloponnefus, in La- coma. THESTIDION, a town of Greece, in Theffaly. THESTIS, a town which belonged to the Arabs. Alfo, a town of Africa, in Libya — ,Alfo, a fountain of Africa, in the Cyrenaica, near Irafa. THETA, e, among the Ancients, one of the Greek letters. It was ufed as a mark on the ballots of judges, by which they condemned the perfon to death, it being the firft letter of the word 0a;vxTo?, death. Whence it had the epithet of niger aud infelix, thus : " O raultum ante alias infelix litera theta." THETES, 0>iT!f, in Antiquity, the loweft clafs of peo- ple at Athens. Ariftides repealed Solon's law by which the thetes were made incapable of bearing any olBce in the government. THETFORD, in Geography, an ancient borough and market-town, partly in the hundred of Shropham, and county of Norfolk, and partly in the hundred of Lackford, in the connty of Suffolk, England, is fituated at the diftance of 28 miles S.W. from Norwich, and 80 miles N.N.E. from London. It was a place of confiderable confequenee at an early period. Thetford, called in the Saxon Chronicle Theodford, has an acknowledged claim of having been once the feat of the Eaft Anglian kings. Being the metropoUs of that portion of the heptarchy, it became fubjeft to the ravages of the Danes, by whom it was repeatedly laid in afhes. From numerous coins, it is evident that there was a mint at Thetford from the time of Athelftan to the reign of king John. At the eaftern extremity of the town are fome ex- tenfive remains of fortifications, confifting of a large artifi- cial mount, or keep, with lofty banks and deep ditches. Thefe fortifications were probably firft formed by the early kings of Eaft Angha, and the keep an addition, made fub- fequent to the Norman conqueft. Eaft of the mount is a large area, or place of arms, three hundred feet fqiiarc. The mount is about one hundred feet in height, and nin^ hundred and eighty-four feet in circumference, at the bafe. The (lope is extremely fteep ; and yet no traces remain of any path or fteps for the purpofe of carrying up machines or weighty ammunition. In the Conqueror's time, Herfaft having removed the epifcopal fee from North Elmham to Thetford, the latter became the head of the Eaft Anglian diocefe ; but in the fucceeding reign, the fee was transferred to Norwich. The ruins of ecclefiaftical and other buildings ftrongly point out the ancient fplendour of this town. At one period it is faid to have had twenty churches, anfwerable to the number of parifties, and eight monafteries, befides other rehgioni? and charitable foundations. But of thefe, the names only of fome remain ; and of others, a few dilapidated walls ferre 3X to T H K to mark tlifir fcitcs. Of tlu- twenty churches, three only arc prefervcd ; St. Peter's, and St. Ciithberl's, on the Norfolk fide of the river; and St. M.iry the Lefs on the Suffolk fide. St. Peter's, commonly called the Black church, from its bein^ conftruftcd chiefly of flint, conlills of a chancel, nave, two aides, and a tower. Tiic latter was rebuilt in 17S9, when a great part of the church was alfo re-edified. The battlements on the fouth fide, and the buttrcffes, are decorated with allufive ornaments and large letters inlaid in the flint work. The Nunnin was founded by Uvius, the firll abbot of St. Edmund's Bury, in the reign of king Canute ; in com- memoration of the number of pcrfons who fell at Snaref- hill, near this town, in the fang\iinary confliA between king Edmund's army and the forces under the Danifh leaders Ingwar and Ubba. A few monks were placed in this monallery, which was then confidered as a cell to Bury Abbey. In the year 1 176, the monks, being reduced to two, religned, by the requeil of tlie abbot of Bur)', who placed in their Head a convent of nuns, who had previoufly rcfided at Lynn. At the diflolution, the revenues and fcite were granted to fir Richard Fulmerilon, who made this houfe nis rcfidcnce. It was afterwards let to a farmer, and fomc years fmce the greater part was taken down : a new farm-houfe was built of the materials, and the conventual church converted into a barn. Some of the walls, with buttreffes, windows, &c. ftill remain. The Priory or Abbey was founded by Roger Bigod, in the year 1 104, for monks of the Cluniac order. This was a pecuharly privileged houfe ; for other Cluniac monafteries wcre^bjeft to have their res'enues feized, on a war break- ing out between England and France, becaufe being de- pendant on the abbey of Clugny, in Burgundy, the monks were confidered as foreigners ; but the religious perfons of this monaftery were naturalized, and treated as other fub- jefts of the realm. At the fuppreffion the revenues were granted to the duke of Norfolk, and are now the property of lord Petre. The ancient gateway, conllrufted with frecftone and black flint, with parts of the church, &c. iUll remain. This monaftery had been the burial-place of the feveral noble families who had fuccefiively borne the title of earls of Norfolk. St. Aujl'm^s Friary was founded by John of Gaunt, duke of Lancaller, in the year 1387, for friars mendicant of the Augurtine order. The fcite, granted to fir Richard Ful- merflon, is ftill called the Friar's Clofe. The Monajlery of St. Sepulchre was founded in 1 109, by William, earl of Warren and Surrey, for canons of the Auguftine order, and additionally endowed by king Henry II. The fcite is ftill called Canons : part of the con- ventual church, yet ftanding, has long fince been ufed as a barn. The gate of the porter's lodge, and fome other parts of the buildings, remain. Of the other four religious Iioufes, no veftiges are now left. In the Suffolk part of the town, near St. Mary's church, is a free grammar-fchool. In the year 1566, fir Riciiard Fulmerfton bequeathed property for the ereftion of a free-fchool, with dwelhng-lioufes and fala- ries for a mafter and uflier ; and alfo habitations andv^-eekly penfions for two poor men and two poor women. The benevolent defign of the donor, however, was not carried into effea till the time of James I., when it was enaftcd by authority of parliament, that there fhould be for ever a free grammar-fchool and hofpital ; and that the mafter, ulher, and the four poor people, ftiould be a body politic, under the title of "The mafter and fellows of the fchool and hofpital at Thetford, founded by king James the Firft, accoj-ding to the will of fir Rachard Fulmerfton, kat." THE Thetford, though a very ancient burgh, is comparatively a modern corporation. In the time of the Conqueror, the town was governed by a conful and other inferior officers. Not being a free burgh, it fuffercd greatly at times by the oppreffion of the officers nominated by the crown. But in the year 1573, queen Ehzabeth granted a charter, by which a mayor, ten aldermen, twenty common-councilmen, a re- corder, town-clerk, fword-bearer, and two ferjeants at mace, conftitute the corporation. The mayor for the time being is clerk of the market, and in the year after his mayoralty officiates as coroner. The corporation had alfo permilfion to fend two burgefles to parliament, " provided they were difcreet and honeft men, and were elefted at the expcnce of the borough." This charter was furrendered to the crown in the thirty-fourth year of Charles II., and a very imperfeft one obtained in its ftead. But in 1692 an order was procured from the court of chancery for cancelling tlic furrender, and procuring a tranfcript of the charter granted by Elizabeth, under which the town is at prefcnt governed, Thetford has been honoured with the prefence of many of our fovereigns, particularly Henry I. and II. Several charters, granted by the former, bear date from this town. When the manor fell with the duchy of Lancafter, of which it formed a parcel, to the crown, the ancient feat of the earls Warren became the royal palace. This was rebuilt in the time of queen EHzabeth, who occafionally re- fided here. King James I. made it one of his hunting feats ; but being difgufted with the abrupt remonftrance of a farmer, over whofe lands he had been hunting, he gave the palace to fir Philip Wodehoufe : it has been rebuilt, and is now the property of a private gentleman ; but ftill bears the appellation of the " King's Houfe." The old guildhall or council-houfe being in a dilapidated condition, fir Jofepli Williamfon, fecretary of ftate to king Charles II., eretied at his own expence the prefent council-chamber, and the apartment for tlie juries. Thetford has been much im- proved within the laft twenty years. A new bridge has been built, the principal ftreet paved, and feveral handfome houfes have been erecled. The navigation of the river has been attended to, and by this communication fome mer- cantile bufinefs is tranfaCled in the corn and coal trade. Five fairs are held annually, and a market weekly on Saturdays ; but, compared with its former greatnefs, it is now a very inconfiderable place. The population in the return of the year 181 1, was ftated to be 2450, occupying 530 houfes. Near to Thetford is a mineral fpring, the waters of which poflefs confiderable virtues, though their celebrity has by no means been commenfurate with their acknowledged ef- ficacy. Thomas Paine, well known for his political and theological trafts, was a native of this town, and received his education in the grammar-fchool Blomefield's Eftay towards a Topographical Hiftory of Norfolk, vol. ii. Beauties of England and Wales, vol. xi. bv John Britton, F.S.A. Hiftory, &c. of Thetford, by Thomas Martin, 4to. Thetford, a town of the United States, in the county of Orange, Vermont ; 10 miles N. of Hanover; containing 1735 inhabitants. THETIS, in Mythology, the name of the moft beautiful of the Nereids. THEVACOURCHY, in Geography, a town of Hin- dooftan, in the Carnatic ; 20 miles W.S.W. of Tiagar. THEUDORIA, in Ancient Geography, a town of Achaia, from which the Macedonians were driven by the Romans. THEUDURUM, a towry of Lower Germany, on the route THE THE route fi-om Colonia Trajana to Colonia Agrippina, between Mederiacum and Coriovallum. Anton. Itin. THEVEN, in Geography, a town of Perfia, in the pro- vince of Lariftan ; 40 miles E. of Lar. THEVENARD, Gabriel Vincent, of Paris, in Bio- graphy, born in 1669, became in the operas of Liilli the firll iinger and aftor of his time. He had a tenor voice, whicli made the public forget that of Beaumavielle ; it was fono- rous, mellow, and extenfive in compafs. He fung a little through the throat, but by dint of art, he found the means of rendering this little deteft even agreeable. His appear- ance on the ftage was dignified, and his performance won- derful ! It was to him that the prefent manner ( 1780) of fpeaking recitative is due. He excelled above all in fmging at table ; nor has he ever been furpafled in that talent, ex- cept by De Chaffe and JeUote, who fo many years delighted their friends. He fung more than forty years at the Opera, and only retired in the year 1730. He was more than fixty years old, when, feeing a beautiful female flipper in a rtioemaker's fliop, he fell violently in love, unfight, unfeen, with the perfon for whom it was made ; and having difcovered the lady, married her, after obtaining the confent of an uncle on whom the was dependent, with the affiftance of many bot- tles of wine which they cracked together with tlie utmoft cordiality, and whicli Thevenard meliorated with the charms of his voice. He died at Paris in 1741, at the age of 72. Thevenard was the caufe of the duke d'Antin quitting the manage- ment of the opera. This finger having a penfion offered him for his fervices, found it fo inconfiderable, that he re- fufed to accept of it, faying it was only fit for his footman. The duke, piqued at tliis infolence, would have fent him to prifon ; but it having been reprefented to him that the public would fuffer by his abfence, he facrificed to this con- fideration his refentment ; but determining to have nothing more to do with fuch people, he quitted the fuperintend- ance of the opera. Laborde. THEVENOT, John, a traveller in the Levant, was born in Lorraine, and after repeated journies, died in Perfia in 1667. He is faid to have introduced the ufe of coffee into France. His "Voyage in Afia" was pubhfhedin 1664, which is a work confiderably elleemed, and has been often re-edited. The Amflerdam edition in 1 2mo., 1 727, is com- prifed in 5 vols. Nouv. Dift. Hiflor. Thevenot, NrcHOLAS Melchisedec, a writer of travels, was born in 1621, probably at Paris, and having finifhed his fludics, indulged his propenfity for vifiting foreign countries, confining himfelf chiefly to various parts of Europe. Some perfons have given him the credit of being a great linguift, but this is difputed by Huet, who was perfonally ac- quainted with him. The refult of his obfcrvations and in- quiries was publiflied in a " Colleftion of Voyages and Travels," eomprifed in 4 vols. fol. from 1663 to 1672. Thevenot was a great colleftor of books, confifling of more than 2000 volumes, in which the royal library, of which he was keeper, was deficient. Nointel, on returning from his embafTy to Conflantinople, enriched this coUeftion by a prefent of his marbles, infcriptions, and bas-rehefs. He died in 1692. From various MSS. in the royal library, he had compiled "The Works of Ancient Mathematicians," an edition of which was publifhed after his death. Moreri, Huet. THEVET, Andrew, a traveller and writer, was born at Angouleme in 1502 ; and being defirou's of vifiting foreign countries, he obtained, by the interefl of the cardinal ■sf Lorraine, an opportunity of going to Jerufalem. His travels in the Levant occupied him from 1549 to 1 JJ4 ; and after his return to France, he accompanied the fieur de Villegaignon, in 1555, to found a colony in Brazil. In 1 556 he took the habit of an ccclefiaflic, and was appointed almoner to queen Catharine de Medicis. He alfo obtained the titles of hiiloriographer and cofmographer royal, and died at Paris in 1590, at the advanced age of 88 years. Befides other works, he publifhed " Cofmographie du Levant," 1554, 4to. ; " Les Singularites de la France An- tarftique," 1588, 410. ; and "Cofmographie Univerfelle," 2 vols. fol. 1575; but unfortunately his veracity is quef- tionable. Moreri. THEVESTE, Tiffeste, in Ancient Geography, a town of Africa, fituated on a delightful plain in the interior of the country, on the banks of a river, E. of Sigus, and E.S.E. of Cirta. In Anton. Itin. this town has the title of a Roman colony, and is placed on the route from Carthage to Csfarea, between Ammcdara Colonia and Attaba. THEVET. See Teuet. THEVETIA, in Botany, a name given by Linnxus, iit his Hortus Cliffort'ianus 75, to a genus diftinguifhed by Plu- mier, and other authors, under the American appellation of Ahouai. The perfon commemorated by the above name was Andre Thevet, a French monk, who travelled to Brafil, of which he publiflied an account in 1554, under the title of Les Smgidarite% de la France AntarB'ique, autrcmcnt nommee Amerique, Sec. Of this book there are feveral editions, with rude wooden cuts, and fomc accounts of plants, amongft which the Ahouai is, for the firft time, defcribed. The author, according to De Theis, died in 1590, about the age of eighty-eight. Haller fays he has injudicioufly applied pafTages in the writings of the ancients to the productions of the new world ; and that he has defcribed many countries which he never yifited. Linnaeus himfelf appears not to have been fatisfied with the honour he was conferring, for he fays he fliould not be difplcafed with any perfon who might change this name for another. He fubfequently retained it as a fpecific name only, when the genus in queflion was funk in his owH Cekbera. See that article. THEU-PROSOPON, in Ancient Geography, a promon- tory of Phoenicia, between Tripolis and Botrys. Mela calls it Euprofopon. THEURGY, SfoDf/iK, a name which the ancients gave to that facred part of magic which we fometimes call white magic, or the nuhite art. The word is formed from ©sor, God, and ffyov, work ; q. d, the art of doing divine things, or things which God alone can do : or the power of working extraordinary and fupernatural things, by invoking the names of God, faints, angels, &c. Accordingly, thofe who have written of magic in the ge- neral, divide it into three parts : the firfl of which is called theurgy, as operating by divine or celeftial means ; the fe- cond, natural magic, performed by the powers of nature ; and the third, necromancy, which proceeds by invoking daemons. This theurgy, or pretended art of fo purging and refining that faculty of the mind, which receives the images of things, as to render it capable of perceiving the daemons, and of performing many marvellous things by their aiTiftancc, was adopted by the difciples of Ammonius towards the clofe of the fecond century. Ammonius, the founder of the feft-of modern Platonics (fee Platonism), with a view of recon- ciling the popular rehgions of different countries, and parti- cularly the Chriflian, v\ith his own fyftem, turned into mere allegory the whole hiflory of the gods, and maintained that thofe beings, whom the priefls and people dignified with this 3X3 title, T H I i.iif, were no more Uiaii tdellial miiilllors, to whom a cer- tain kind of inferior worllilp was due. He acknowledged Chritl to be a moll excellent man, tlie triend of God, and the admirable theurge ; but denied that it was his intention entirely to abolilh the worlhip of dxmons, and of the other miuiilers of divine providence ; affirming, on the contrary, that he merely purified the ancient religion, and that his fol- lowers had manifedlv corrupted the doanne of their divme mailer. Molh. EccJ. Hill. vol. i. 8vo. THEUTIS, in /Incimt Geography, a fmall town ot Ar- cadia, S. of the river Lodon, and near that of Tuthoa. THEL'X, in Geography, a town of France, in the de- p.-irtment of the Ourtlie ; 5 miles N.W. of Spa. THEXIS, a word ufed by the old medical writers, Sometimes for wounds made by punfture with fmall inftru- ments, and fomctimes for the operation of the future, or the fewing together the lips of a wound, to make it heal with a Icfs fear. THEYA, m Geography. See Teya. THEYE-CHEEKE Lake, a lake of North America. N. lat. 65 \ W. long. 109^. THEYE-NOYE-KYED Lake, a lake of North Ame- rica. N. lat. 64° 10'. W. long. 108°. THEYHOLEKYED Lake, a lake of North Ame- rica. N. lat. 62°. W. long. 102° 5'. THEYSSE, a river which rifes in the E. part of Hun- gary, on the borders of Poland, and runs into the Danube ; 19 miles N.W. of Belgrade. THEZE, a town of France, in the department of the Lovi infra. The government of Tibet has been confidered as eccle- fiaftical or fpiritual ; though the lamas were accuftomed to appoint a " tipa," or fecular regent, a right which has been probably transferred to the Chinefe emperor. This officer . refides at Lafla tlie capital, and he is invefted with the go- vernment and fupreme controul over the whole country. Mr. Turner, however, is of opinion, that the temporal au- thority of the lamas may again recover its former dignity and fplendour. Bootan, which is generally confidered as a feudatory province of Tibet, has a raja or prince called Daab, of no very permanent or extenfivc authority. The laws muft, like the religion, bear fome affinity to thofe of the Hindoos. The lama of Tibet was the Preftcr John of the middle ages, if he were not fome Neftorian khan ; and the appella- tion was unaccountably transferred byJPortuguefe ignorance to the emperor of Abyflinia. (See Prester John.) In the time of Marco Paolo, Tibet, having been ravaged by the Monguls, was almoft defolate. For fome time this coun- try had been fubjeft to fecular kings, called Tfan Pa ; and the lama refided at Laffa, with a power refembling that of the fpiritual prince of Japan. According to Giorgi, the fuc- ceffion of kings and lamas commences about i 340 years B.C. but about 1 1 00 years after Chrift the Chinefe emperor gave to a celebrated lama the regal power. Thofe Monguls, called Eluts, conquered the fecular prince, and transferred the whole power to the lama. (See Du Kalde, iv. ^o.) In 1792, the Nipalefe, having committed great ravages in Tibet, the Chinefe emperor fent an army to proteft the lama ; in confequence of which the Chinefe eftabliflied military pofts on the frontiers, fo that tlie intercourfe between their country and Bengal is now precluded. The revenues of the lama and of the fecular princes are trifling ; nor is it likely that Tibet can ever afpire to any political importance. Some have faid, that the religion of Tibet is a corrupted Chriftianity ; and even father Difiderii, a Jefuit, who vifited the country about the beginning of the laft century, thinks he can refolve all their myfteries into our^ ; and he afferts that they have a good notion of the Trinity, fince, in their ad- drefs to the Deity, they fay as often koneiok-oik in the plu- ral, as koneiok in the fingular, and with their rofaries pro- nounce thefe words, Om, Ha, Hum. Of thefe whimfical conjeftures we fliall fay no more, but pafs on to obferve, that the religion of the Tibetians feems to have derived its origin, fays Turner, ( ubi infra, ) from a difciple of Budh, who firft broached the doftrine which now pre^'ails over the wide ex- tent of Tartary. It is reported to have received its earliefl: adniifTion THIBET. admifTion in that piri of Tibet bordering upon India, (which from hence became the feat of the fovereign lamas,) to have traverfed over Mantchcw Tartarj-, and to liave been ulti- mately dilTeminated over China and Japan. Though it dif- fers from the Hmdoo in many of its outward forms, yet it ftill bears a very clofc affinity with the rehgion of Brahma in many important particulars. The principal idol in the temples of Tibet is Mahamoonie, the Budha of Bengal, who is worlhipped under thcfe and various other epithets through- out the great extent of Tartary, and among all the nations to the cattward of the Berhampooter. In the wide extended fpace OVV.T which this faith prevails, the fame objeft of vene- ration is acknowledged under numerous titles ; among others, he is ftylcd Godamaor Gowtama, in Affam and Ava ; Sa- mana, in Siam ; Amida Bulh, in Japan ; Fohi, in China ; Budha and Shakamuna, in Bengal and Hindooftan ; Dherma Raja and Mahamoonie, in Bootan and Tibet. Durga and Kali ; Ganeifh, the emblem of wifdom ; and Cartikeah, with his numerous heads and arms, as well as many other deities of the Hindoo mythology, have alio a place in their affemblage of gods. The fame places of popular efleem or religious refort, arc equally rcfpcfted in Tibet and in Bengal ; Praag, Ca(hi, Durgeedin, Saugor, and Jagarnaut, are objedls of devout pil- grimage ; and load* of the facred water taken from the Ganges, have been feen travelling over thefe mountains, (which, by the bye, contribute largely to its increafe,) upon the rtioulders of men, whom enthufialls have deemed it worth their while to hire at a confiderable expence for fo pious a purpofe. As far as can be judged refpefting their ritual or ce- remonial worfhip, it differs materially from the Hindoo. The Tibetians alFemble in chapels, and unite together in prodigious numbers, to perform their religious fervice, which they chant in alternate recitative and chorus, accompanied by an extenfive band of loud and powerful inftruments. So that, whaiever thefe congregations were heard, they forcibly re- called to remembrance, both the folemnity and found of the Roman Catholic mafs. The inftruments made ufe of were all of an enormous fize. Trumpets above fix feet long ; drums ftretched over a cop- per cauldron, fuch as are termed nowbut in Hindooftan ; the gong, a circular Chinefe inftrument of thin hammered bell- metal, capable of producing a furprifing found ; cymbals, hautboys ; and a double drum, (hallow, but of great circum- ference, mounted upon a tall, flender pedeilal, which the performer turns with great facility, ftriking either fide with along curved iron, as the piece requires a higher or a lower tone : thefe, together with the human tibia, and fea-conch, a large fpecies of the buccinum, compofe, for the moll part, their religious band. Harlh as thefe inftruments, individually taken, might found to a mufical ear, yet when joined toge- ther in unifon with the voices of two or three hundred boys and men, managed with varying modulation, from the Icweft and fofteft cadence to the loudeft: fwelj, they produce to the car an effeft extremely grand. Other mufical inftruments are in the hands of the people of Tibet. Among the Tibetians, fays Mr. Turner, all is fyftem and order. The mind readily obeys the fuperiority it has been accullomed to acknowledge. A fovereign lama, immaculate, inimortal, omniprefent, and omnifcient, is placed at the fum- mit of thsir fabric. He is efteemed the vicegerent of the only God, the mediator between mortals and the fupreme. They view him only in the moft amiable light, as perpe- tually abforbed in religious duty ; and, when called to be- ftow attention on mortal beings, as employed only in the be- nign office of diftributing comfort and confolation by his bleffing, and in exercifing the firft of all attributes, forgive, nefs and mercy. He is alfo the centre of all civil govern • ment, which derives from his authority all its influence and power. At the fame time that he is the foul which animates their whole fyftem, a regular gradation, from the moft vene- rated lama, through the whole order of Gylongs to the young noviciate, is obferved with rigid ieverity. The inferior gradations from the prefidentof a monaftery, who is always ftyled lama, in addition to the name of the ftation to which he belongs, are Gylong, Tohba, and Tnppa. See Gylong, Teshoo-Loomboo, Tohba, and TirppA. The nation is divided into two diftinft and feparate clafles, thofe who carry on the bufincis of the world, and thofe who hold intercourfe with heaven. No interference of the laity ever interrupts the regulated duties of the clergy. The latter, by mutual compaft, take charge of all their fpiritual concerns ; and the former, by their labours enrich and po- pulate the ftate. In Tibet there are two fefts, diftinguilhed by the appella- tions of Gyllookpa and Shammar, but the external appear- ance, or drefs of both, is fimilar, except the diftinftion in the colour of the cap ; the Gylloopka having adopt- ed yellow, the Shammar red ; a circumftance which is ftriftly sttended to, on all occafions of ceremony. Three lamas are placed at the head of each fedl ; Dalai lama, Tefhoo lama, and Taranaut lama, prefide over the Gyl- lookpa, who have their refidence at Pootalah, Tefhoo- Loomboo, and Kharka. This feft prevails over the greateft part of Tibet, and a divifion of the fame is faid to be eila- bliftied in a province of the Decan, called Seurra or Serrora. In like manner, three lamas alfo, lam' Rimbochay, lam' Sobroo Nawangnamghi, and lam'Ghaflatoo, prefide over the Shammar ; thefe have their refidence in Bootan, in feparate monafteries, but, from the limited extent of that country, at no great diftance from each other. The principal of the Shammar feft in Tibet is ftyled Gongfo Rimbochay, and has his refidence at Sakia. The Tibetians are aftuated by an ardent fpirit of devo- tion ; and they attribute the merit of every thing great, or fingularly beneficial, to the agency of fome fupernatural being. It is the cuftom in Tibet to preferve entire the mortal remains of their fovereign Lama only ; every other corpfe is either confumed by fire, or given to be the promif- cuous food of beafts and birds of prey. As foon as life has left the body of the Lama, it is placed upright, fitting in an attitude of devotion, the legs being folded before him, with the inftep reaching upon each thigh, and the foles of the feet turned upwards. It is the praftice here to cover the bodies of men, found dead in the fields, with clods of earth, which the rains gradually diflblvc and incorporate, forming the loofe mafs into a compaft hillock. This always attracts the fame refpeft, and paflengers continue to add to the heap, long after all trac-es of the body are loft, and its exiftence forgotten. Thus alfo the piety of the Tibetians offers a fimilar rite to the bodies of thofe whom chance may have led to the fpot, where the fragment lay at the inftant of its fall, though the fatal effefts of it may not have been certainly known. A tribute of refped is paid, in this region, to the manes of the dead in various ways. The fovereign lamas are depo- fited entire, in ftirines prepared for their remains, whjch ever after are looked upon as facred, and vifited with reli- gious awe. The bodies of inferior lamas are ufually burnt, and their afhes preferved with great care in little metallic idols, which have places afTigned them in their facred cabinets. Common fubjefts are treated vnxh. lefs cere- mony ; THIBET. mony ; fome of them are cirried to lofty eminenoes, where, after having been disjointed, and the hmbs divided, they are left a prey for ravens, kites, and other carnivorous birds. Others, with lefs refpeft, are committed to the ufiial receptacle of the dead. The laft, but lefs frequent, mode of difpofnig of the dead, is committing them to the waters of the river. Burial, that is, inhuming the corpfe entire in the earth, is altogether unpraftifed. On one fide of the monallery of Teflioo-Loomboo is the place to which they convey their dead. It is a fpacious area, inclofed on one part by a perpendicular rock, and on the others by lofty walls, raifed probably with a view to feclude from public obfervation, the difgufting objefts contained within them. At the top it was totally un- covered, lo as to be perfectly open to the birds ; and at the bottom a narrow paflage was left through the walls, near their foundation, for the fole purpofe of admitting dogs, or other beads of prey. On the rock above, a platform overhung the inclofure, which had been conftrufted for the conveniency of precipitating the dead bodies with greater cafe over the walls, into the area. And here, the only rites performed, in honour of the dead. Were merely fuch as tended to facilitate the deftruftion of the body by dogs or birds of prey. But though this was the general recep- tacle, yet there were fome who declined the ufe of it, and conveyed their friends to the fummit of fome neighbouring hill, where they disjointed and mangled the dead body, that it might become a more eafy prey to carnivorous birds. Hence it was concluded that there was a ftrong prejudice in their minds of fome idea of pollution attached to " being given to the dogs," which was fufficient to create a pre- ference of the contrary praftice. In Tibet, as well as in Bengal, an annual feftival is kept in honour of the dead. The Tibetians are much addifted to fuperftition ; and accordingly they lay great ftrefs on lucky and unlucky days. Tliey alfo pay great refpeft to the profeflbrs of aftrology. Hence we find no prudent traveller ever at- tempting to undertake a journey, without previoufly ap- pealing to this authority, and endeavouring to obtain an aufpicious prefage. The fame fignal of favour is deemed indifpenfably requifite in every important enterprife, and the fame wary circumfpeftion enters equally into all the more minute concerns of domeftic life. The union of the fexes, and the giving names to infants, are neither of them events to be accomplifhed without a regular appeal to the fame decifive oracle. Tliis fcience is alfo regarded in the conftruftion of their almanacs. Their year, which is lunar, confifts of 12 months, each month having 29 days ; and tlie days are reckoned from the appearance of the new moon, in regular fucceffion, till it fliews itfelf again. The parts of the days are, evening, night, morning, and noon : and their computation of time is conformable to the general praftice of the Eaft, by a cycle of 12 years. The art of printing is faid to have been very anciently praftifed in Tibet ; but it has hitherto been principally appropriated to facred works, and to the fervice of learning and reli- gion. Their books are pnnted with blocks of wood, on narrow flips of tliin paper, fabricated from the fibrous root of a fmall fhrub. The printed and written letters appropriated to works of learning and religion, are called " uchen ;" and thofe of bufmefs and correspondence are called " umin." The Gylongs, or priefls, pafs through a regular education. As for the language of Tibet, its origin is not fatisfaftorily afcertained. Du Halde reports, that it is the fame with that fpoken by the people of Sifan, on the frontiers of China ; but as this province is fometimes included in Tibet, this intormation is vague and indeterminate. Their chu- I rafters, fays fir William Jones, are apparently Indian, but their language has now the difadvantage of being written with more letters than are ever pronounced ; for, although it was anciently Sanfcrit and polyfyliabic, it feems at pre- fent, from tlie influence of Chinefe manners, to confift of monofyllables, to form which, with fome regard to gram- matical derivation, it has become neceflary to fupprefs, in common difcourfe, many letters which we fee in their books ; and thus we are enabled to trace in their writings a number of Sanfcrit words and phrafes, which, in their fpoken dialeft, are quite undiilinguifhable. A fingular cuftom prevails in this country, which may be called polyandry. One female afTociates her fate and fortune with all the brethren of a family, without any re- ilriftion of age or of numbers. The choice of a wife is the privilege of the elder brother ; and it is faid, that a Tibetian wife is as jealous of her connubial rites, though thus joined to a numerous party of hufbands, as the defpot of an Indian zennana is of the favours of his imprifoned fair. The bufinefs of propagating the fpecies is abandoned to mere plebeians ; and marriage feems to be confidered rather as an odium and a burden. The influence of this cuftom on the manners of the people is not found to be unfavourable. Humanity and gentlenefs of difpofition are the conftant inheritance of a Tibetian. Mr. Turner fays that he never faw thefe qualities pofleffed by any people in a more eminent degree. Without being fervilely officious, they are always obliging ; the higher ranks are unaffuming ; the inferior, refpe<£lful in their behaviour ; nor are they at all deficient in attention to the female fex ; but, as we find them moderate in all their paffions in this refpeft, alfo their conduft is equally remote from rudenefs and adulation. Comparatively with their fouthern neighbours, the women of Tibet enjoy an elevated ftation in fociety. To the pri- vileges of unbounded liberty, the wife here adds the charafter of miftrefs of the family, and companion of her hulbands. The company of all, indeed, flie is not at all times entitled to expeft. Different purfuits, either agricultural employ- ments or mercantile fpeculations, may occafionally caufe the temporary abfence of each ; yet whatever be the refult, the profit of the labourer flows into the common itore ; and when he returns, whatever may have been his fortune, he is fecure of a grateful welcome to a focial home. The men are generally ftout, having in a degree the Tataric features, and the women are of a ruddy brown complexion, heightened bke the fruits by the proximity of the fun, while the moun- tain breezes beftow health and vigour. The ceremonies of marriage are neither tedious nor intri- cate in Tibet. Their courtlhips are carried on with little art, and quickly brought to a conclufion. The elder bro- ther of a family, to whom the choice belongs, when ena- moured of a damfel, makes his propofal to the parents. If his fuit is approved, and the ofFor accepted, the parents, with their daughter, repair to the fuitor's houfe, where the male and female acquaintance of both parties meet and caroufe for the fpace of three days, with mufic, dancing, and every kind of feftivity. At the expiration of this time the marriage is complete. Tibet is thinly fcattered with inhabitants, on account 6{ its mountainous furface and the feverity of its climate ; nor can any accurate cftimate be made of its population. From fome circumftances it has been conjeftured, that upon the whole it cannot be lefs than half a million. Giorgi, in- deed, or rather PinnabiUa, from whom he deduces his ftate- mcnt, computes the number of inhabitants in 1730 at 33 millions, and the foldiers at 690,000 ; but both thefe num- bers are moft extravagantly exaggerated ; for Tibet has been THIBET. b«en often conquered by tlic Cliinele with armies not ex- ceeding 40,000 men. The fingular cuUom of polyandry, already mentioned, feems .-.dapted to check the progrefs of populatioii, the fupcrabundance of which, in an infertile country like Tibet, would be one of the greatcft calamities, a» it mull produce eternal warfare or internal want. Bootan and Tibet exhibit a very remarkable contrail in llieirexternal appearance. Bootan prefentstotheview nothinjj but the moll mis-fhapen irregularities ; mountains covered with eternal verdure, and rich with abundant forefts of large .-uid lofty trees. Almod every favourable afpeift of them, coated with the fmallcll quantity of foil, is cleared and adapted to cultivation, by being flielved into liorizontal beds : not a flopc or narrow flip "of land between the ridges lies unimproved. There is fcarcely a mountain, whofe bafe is not wafhed by fome rapid torrent, and many of the loftieft bear populous villages, amidft orchards and other plantations, on tiieir fummits and on tlieir fides. It com- bines in its extent the moft extravagant traits of rude natare and laborious art. Tibet, on the other hand, ftriJces a traveller, at firft fight, as one of the leall favoured countries under heaven, and appears to be in a great meafure incapable of culture. It exhibits only low rocky hills, without any vifible vege- tation, or extcnfive arid plains, both of the moft ftern and ftubborn afpcft, promifing full as little as they produce. Its climate is cold and bleak in the extreme, from the fevere effefts of which the inhabitants are obliged to feek refuge in Sheltered valleys and hollows, or amidft the warmeft afpefts of the rocks. Yet perhaps Providence, in its im- partial dillribution of blefllngs, has beftowed on each coun- try a tolerably equal fhare. The advantages that one pof- fefles in fertihty, and in the richnefs of its forefts and its fruits, are amply counterbalanced in the other by its multi- tudinous flocks and invaluable mines. As one feems to polTefs the pabulum of vegetable, in the other we find a fupcrabundance of animal, life. The variety and quantity of wild fowl, game, and beafts of prey, flocks, droves, and herds in Tibet, arc aftoniftiing. In Bootan, except domeftic creatures, nothing of the fort is feen. It has been afterted that Tibet was, in remote times, almoft totally inundated ; and the removal of the waters that tovered its furface is afcribed to the miraculous interpofition of fome objeft of the'r worfhip, whofe chief temple is reported to be at Dungeedin, Gya. In this traditionary belief we may podibly difcover fome traces of the unrverfal deluge ; though the tradition be obfcured by fable and disfigured by a mixture of abfurdity. In the temperature of the feafons in Tibet, a remarkable uniformity prevails, as well as in their periodical duration and return. The fame divi- fion of them takes place here, as in the more fouthern region of Bengal. The fpring is marked from March to May, by a variable atmofphere ; heat, thunder-ftorms, and occafionally with refrefhing fhowers. From June to Sep- tember is the feafon of humidity, when heavy and continued rains fill the rivers to their brim, which run off from hence with rapidity, to aflift in inundating Bengal. From OAober to March, a clear and uniform fl. Sl-cTingau. THINGVALLA, a place of Iceland, about 26 miles didant from Rcikiavik, and 24 miles from Skalholt ; m which ii a fniall, mean, and dirty church. The fcenery about it is romantic : but the want of wood, and the cflcas of fubtcrraneous heat, combine to give it a dreary afpca. TiiL- adjoining lake of the fame name is a fine fliect of water, reckoned to be about ten miks long and from thi-ee to feven ill breadth. In I>he lakes are two pretty large idamls, called Sanday and Nefey, comuofed entirely of volcanic matter. The depth of the lake is faid to be very great ; a line of 100 fathoms having been funk without reaching the bottom. It receives the waters of the furrounding bogs, and near it in different places vapours are feen to afccnd from hot fpriiigs. It abounds with trout. At the S. end the moun- tains arc very pifturcfque, and the afcending vapours contri- bute to tlie folemnity of the wl-.ole fcene, as they arife from fpiings that have been produced by the moft dreadful com- jiiotions, and the deftruCtion of a country that may once have been beautiful and fertile. Near Thingvalla is a building, where the courts of jufticc were formerly held ; but as Rcikiavik is now the feat of government, the courts are held there. It docs not appear why this place was originally fe- IcAed for the feat of jullice ; but a town being once efta- bliflied, and trade carried on freely, and to a greater extent than in former times, ready recourfe to the law became ne- ceffary. Although not more than rifteen years have elapfed (1817) fince the judicial courts were transferred to Rcikia- vik, few remains are left to mark a fpot fo famous in the liiftory of Iceland. The only building is a fmall wooden houfe, in which the confultations were held and fentence pro- nounced by the lliftantment or governor. The magiilrates and people affembled on the occafion lived in tents. The culprits who were condemned to die were beheaded on a fmaU idand in the river Oxeran, which here flows into the lake. The females wei-e drowned in a deep pool below the lava, a little farther up the valley. An ecclefiaftical court ufed to be held at Thingvalla by the biiliop of Skalholt, at- tended by the provofts and two miniftcrs from each Syflel. It is fuggefted, that Tingwall in Shetland, and Dingwall in Rofsfliire, are evidently the fame names as Thingvalla ; and were probably, in ancient times, places where juilice was ad- miniHered. Towards the N. arc feveral ranges of moun- tains, which, from the account received, and the appearances obferved, are volcanic. Among thefe, the principal feems to be Skalbreidc, a lofty Jokul, of which defcription of moun- tains others were feen at a diftance. Although the trans- ference of the fuperior court from Thingvalla to Reikiavik has, probably, been attended with advantage, the Icelanders, as a people, have fome reafons for regarding this change with regret. The annual meeting at Thingvalla was not merely that of a tribunal of juftice, but an afle.nibly of the nation ; and though the importance of this affembly was di- miniflied, and its dignity degraded, by the fubjeAion of the iDand to a foreign power, yet on the fpot where the greatell among his ancellors fo often Hood, the mind of the Icelander lauft ever have been awake to enthi;fiafm and patriotic pride. " Hie facra, hie genus, hie majorum multa veiligia !" Mac- kenzie's Iceland. THINKING, Cogitation, a general name for any a&. or operation of the mind. Chauvin, with the Cartefians, will have thinking to con- fift in a certain native, inherent motion or agitation of the human mind, of which itfelf is confcious Nailve and in- lunnt, fince he conceives it no other than the very effence of the mind itfelf, or, at leaft, its principal .ind fundamental property : an agitation, fincc there is a new modification or T H I change made in the mind, which we fcarcely know how to conceive without motion ; add, that the origin and etymo- logy of the word cogitation, according to Varro and Feitus, implies as much ; cogito being ufed for coagito. When the mind turns its view inwards, upon itfelf, the firft idea that offers, fays Mr. Locke, is thinking ; in whiclb it obferves a great variety of modifications, and of them, frames to itfelf dillinfl ideas : thus the perception annexed to any impreflion on the body, made by an external objeft, is called y^n/a/io?;. When an idea recurs without the prefence of the objeft, it is called remembrance. When fought after by the mind, and brought again into view, it is called recolhlfion. When held there long under attentive confideration, it is called contemplation. When ideas float in the mind without regard or reflexion, it is called a re-very ; when tliey are taken exprefs notice of, and, as it were, regiftered in the memory, it is attention; and when the mind fixes its view on any one idea, and con- fiders it on aU fides, it isjludy and attention. Thefe are the mofl obvious modes of thinking ; but there are feveral others which we know of ; and, doubtlefs, the mind is capable of infinite others, of which we have no notion at. all. The fchool-philofophers ufuaUy divide thinking, with re- gard to the objeft it is employed about, into underftanding, intelledio ; and willing, volitio. And hence, thofe are faid to be the two powers or facul- ties of the human mind. IntdltHual thinking is farther fnbdivided into divers kinds ; the firfl, when the mind merely apprehends or takes notice of a thing, called perception ; the fecond, when it affirms or denies a thing, caned juclgmcnt ; the third, when it gathers or infers a thing from others given, called reafoning ; the fourth, when the mind difpoles its own thoughts or ideas in order, called method. VoUlive thinking, or volition, admits of infinite different modifications, or new determinations. Some authors extend the idea of thinking farther ; and confider it in God, angels, brutes, &c. whence refults a new diviiion of thinking, into divine, angelical, human, and animal or fenfitive. But the two firfl we know little or nothing of: the third is that of which we have already been treating. — As to the laft, ii/'z. animal or fenfitive thought, it is defined to be, an action of the foul attending to an external objeft, afFcfted by means of the animal fpirits duly agitated in the brain, to excite an idea. The C;u-tefians maintain, that thinking is efiential to the human foul ; and, confequently, that there is no time when the foul does not think : but this doftrine has been very vi- gorouily attacked by Mr. Locke ; wlio labours to fhew, that in fleep, without dreaming, there is an entire cefTation of the modes of thinking. / think, cogito, according to Des Cartes, is the firfl, and mofl certain, of all truths ; from which, alone, we draw this coniequence, therefore I am, or exiit, firm. — One might alfo fay, cogito, ergo Deits cjl ; I think, therefore there is a God. — Logic is defined, the art of thinking methodically. THINNING of Plantations and Woods, m Agriculture. The practice of thinning plantations of trees and woods, fo as to let the plants of them have more room as they advance in growth, is moftly an operation of confiderable importance ; as upon it, perhaps, more than upon any other point of the after-management in fuch cafes, depends the nature, quan- tity, T H 1 T H r tity, and moditication of tho timber which is railed and produced. Woods of the natural kinds, tlie feeds of which are fown by birds or the winds on foils and furfacos of very dif- ferent defcriptions and forts, rife and fpring up at different times, and of very different degrees of thicknefs, ftrength, and vigour in themfclves and their different parts ; confe- quently it is eafy to fuppofe, that thofe which are placed in favourable lltuations and circumftances, will quickly overtop the others ; and if they do not wholly dcllroy, will at leaft weaken tlu-m in fuch a way as not to be affefted or inconvenienced by them, until the itrongell trees ultimately find ample and fufficient room for their growth. In this way, although nature may be flow in her operations, ihe cffecls her purpole in a veiy complete manner. Befides thefe obfervations, Mr. Loudon has noticed that artificial thinning is only affifting nature ; and that hence even leav- ing natural woods to be thinned by time, would not be economical. It is fuggefted with regard to artificial plantations, that in thefe the foil is equally cultivated, and the plants are put into the ground much about the fame fize, and at the fame time, and that hence they of courfe rufli up together all nearly of the fame height, producing neither ornament nor timber ; and none being pix)duced fo llrong as to take the lead and deftroy the reft, they grow in this manner until they are fo crowded as to exclude air and moifture. At which period, unlefs affiftance has been previoufly given by thinning, the whole of the plantation dies together, and is deftroyed. Where thinning is neceffary in old natural woods, or fuch as have been planted, it fhould conftantly be performed by degrees in a regular manner, well confidering the ftate, qualities, and habits of the trees, as well as the nature of the foil on which they grow, the fituation and expofure in which they are placed, and other fimilar matters. The outfides of them ftiould commonly be lefs thinned than the other parts, and the trees on the richer parts of the land be more thinned than thofe on the other defcriptions of it. The thinning of the fide fhoots and branches of the trees fhould likewife, in fome meafure, accompany the other thin- nings, and be performed in a fuitable manner to their natiu-es, ftates, and purpofes for which they are intended. It is, however, moftly the cuftom to begin to thin them out at about feven years from the time of planting them, or that of their firft growing up, and to repeat it every feven years afterwards. When the planting has been performed in the proportion of from fix to eight hundred trees to the acre, they may be made to Hand, in the firfl thinning, at about one tree to each rod of ground, or nine trees to eight rods. But in the fccond thinning, a rather larger proportion of trees ftiould be taken out, as rather more than one to each rod ; and in the third thinning, the proportion maybe made ilill in a larger ratio, fo as to leave the trees about a rod fquare each. Much mnft, however, always depend upon the nature, fituation, and circumftances of the particular plantations and woods. In all thefe thinnings the worft trees fliould be removed, fo as to leave the ftraighteft and beft plants to ftand for timber or other ptirpofes. It is fuggefted, that as in moft plantations the fir tribe of trees has been introduced either for the purpofe of orna- ment or fheltcr ; where thinning is praftifed, in fuch cafes, too large a proportion of thefe firs are moftly left. Hence, from their comparatively quick growth, it is concluded tliat fuch plantations have a difagreeable famenefs through- 12 out ; an.d that, as moft of them arc made in the fame manner, this appearance extends itfelf over the whole country. The plantations in which thinnings in the way of orna- ment is moft particularly required, are thofe which arc de- fignedfor groves. In many woods and copies no plants re- quire to be taken out but the nurfe ones, where any fuch have been planted. Plqntatious of the fir kind, Mr. Loudon advifes to be thinned fomewhat gradually, begin- ning the work after they have been five or iix years planted, and continuing it for ten or twelve years : after which time, thinning, he thinks, becomes pernicious. And that the trees whicii are to be liiinned out lliould conftaiitly be grubbed up by the roots ; for that when thefe ai-e fuftcied to remain, they check tlic progrefs of the trees which are left. But thele forts of plantations are fometimcs, and very properly, left altogether witiiout thinning, being cut down wholly as a crop when fifteen or twenty years old, or of about that Handing. This is conceived to be in general the moft profitable mode of planting and after-management on thin, bare foils in the vicinity of mines and pits, where wood of this fort is greatly in demand by the proprietors for the fupport of the upper ftrata. Where fome of the fir tribe have been planted as nurfes, they are recommended to be thinned out in a gradual manner, by being grubbed up as they begin to injure and inconvenience the principal trees. And groves, where the trees are of the deciduous kinds, fhould be thinned out after the fame manner ; oulj', the work in thele cafes may proceed until the trees have ai^rived at nearly their full growtiis. Woods, where luider-growth is always the objedl intended when they are properly planted, require, as has been fe^n above, no fort of thinning, unlefs in cafes where nurfes have been planted, or when the timber -trees are too much crowded by the low growths ; the whole (hould be fuffered to grow for twelve, fourteen, or more years, or until the under-growth is in a fuitable ftate to be cut over ; when at that period the ftrongeft trees ftiould be fixed upon, and left as ftandards in a properly tliin ftate. As copfe-woods ufually grow a certain length of time in proportion to their natures and kinds, and are then wholly cut over by the furface of the ground ; they, of courfe, demand lefs thinning than others, or none at all, except when nurfes have been planted among them ; and in the cafe ot both woods and copfes, thefe, as they arc thinned out, fiiould conftantly be replaced by the principal trees at fuitable diftances. In all cafes where ornam.ent is in any way confidered, the above writer thinks the trees or copfe left in thinning ftiould not be equidiftant from each other, but in' groups of irregular thicknefs ; and it is fuppofed that the fame may be had re- courfe to even in woods where utility is the chief confider- ation ; as it will make no material difference in the produce of timber, and is fo much more natural. See Plantation and Planting. See alfo Timber and Wood. Thinning out Crops, the practice of thinning out fuch plants among them as are too thickly or clofely placed to- gether, as in the cafe of turnips or other limilar crops. In the different forts of turnips, the thinnings may be made in fuch a manner as that the plants may ftand ultimately at the diftance of from feven or eight to nine or ten inches every way from each other, in proportion as the land is more poor or rich in its quality. But in caiTOt crops, the thin- ning them out to the diftance of about eight or twelve inches, according to the richnefs of the foil, may probably be the moft proper praftice. And the fame will moftly be the cafe for thofe of the parfnip and beet kinds. Where cabbage, borecole, or other limilar crops, are fown> T H I Town, they (hould always bo thinned out to tJ.e diltance of . foot and a half, two Ll or n.ore, us the fo.l may be of a lefs or more rich quality. And lettuces, when put u. by fowine. fhould be thinned to the d.ftance of from eight to twelve inches, according to the nature of the foil. The thinning out of any other fortB of held-crops of theR- kinds muH alfo be p.-rformed accordmg to their natures and particular habits of growth. , „ , ■ , Some of tliefe forts of crops are beft thinned out in a irradual manner, as the turnip, carrot, beet, &c. • while in others it may be done all at once, as for the cabbage, and fome othi-r kijids. „ ,- , There .ire feveral different methods praftifcd in accom- plilhinff this bufinefs, as by means of the hand fimply, the ufe of the hand-hoe of different fuitable fi/.es, accordmg to the dates and circumllanccs of the crops, and lately in the row kinds, bv an implement invented for the purpoie. 1 his lail is bv much the cheapell and moft expeditious manner of performing the work ; if it fliould be found, on further trial, to be equally accur.ite and effectual in the execution ot the bufuufs. This fort of tool or machinery was invented and conftrucled on the fann of Charles Gibfon, efq. at Quarmer Park, near Lancafter, and a reprefentation of it is given in the Corrcftcd Agricultural Survey of that county, lately pubhHied. See Thinning and Hoeing Machine for Turnips, tffc. , • , ■ J The other modes of effeding and completing this kind of work, are a great deal more troublefome, laborious, and cxpenfive than the above, efpecially the firll of them, as many hands and much time are required for doing it in the moil proper .ind effeftual manner by fuch means. Where the hand-hoe is employed, two or three different fized hoes are moftiy made ufe of for the purpofe in the different fuc- ceffive thinning Ivoeings, which, when in the hands of expe- rienced workmen, do the bufinefs in a pretty quick, eafy, and complete manner, as the fupernumerary plants are flruckand cut out with much exaftnefs and regularity. It is conftantly neceffary in fuch cafes to keep the hoes in a pretty (harp (late, in order to perform the work well, and with neatnefs. The principal obicftions to doing this fort «f labour bv the hand, are its tedioufnefs, and the treading wliich takes place during the operation. TitiNNlNG out Plants, in Gariitfning, the pulling or drawing out fuch as are too clofe and thick in fome crops of the t;eneral and other kinds, as well as in fome other cafes, fo as that the remaining ones may (land at proper and fuitable diftanccs for producing the moll favourable crops, plants, or other productions. 'Fhis is mollly praftifed in the cafes of the main crops of onion, carrots, parfnips, beets, fpinach, and feveral other fiiiiilar kinds, which are fowu in the broad- call manner ; in different fmall feed crops, for rai(ing plants to be afterwards fet out, fuch, for inftance, as the cauli- flower, brocoli, cabbage, borecole, lettuce, endive, and many others ; and in the producing and bringing forward young tree plants of moll forts in nurfery grounds and other places. Onion crops are, far the mod part, thinned out at dif- ferent times, as the demands of the markets, or in other ways may be, fo as to leave the rem.aining plants at the dif- tances of four or five inches or more from each other, ac- cording to their nature, kinds, and other circumllances ; always, however, allowing fufficient room for their full and complete growths. Much advantage is often made in this way by the young onions which are thinned out, which would otherwife be loll and thrown away. The carrot, parfnip, and beet crops are commonly thinned T H I out at one or two thinnings, the (landing plants being left at the didances of about (ix or eight inches apart, as the nature of the foil and crops may be. The young plants of the carrot kind, thus drawn, are in fome cafes bunched and made ufe of, efpecially when the crops are late in being thinned out, which (hould always be avoided as much as poffible. Lettuce aiid fpinach crops may be thinned out at once to the didances of fix, eight, or more inches between the plants, in the different kinds, as the nature of them may be, when put in upon the broad-cad plan. The thinnings are of little ufe or value, except for wade purpofes, fuch as being thrown to the hogs, &c. in thefe indances. Moil other fimilar forts of crops may be thinned out in the fame manner. The fmall feed crops of the different kinds (liould con- dantly be kept fo thinned out as to prevent the plants of them from being drawn up in a weak manner, and unfit for being fet out ; as where the contrary i-s the cafe, there is always great wade, and the plants feldom fucceed fo well. They lliould be gradually thinned out by planting, as well as in other ways. Young tree plants, in mod cafes, require frequently thin- ning out in their early growths, in order to raife and bring them forward in the bed and mod perfedl manner. They ftiould therefore, in general, be fo kept thinned out as never to want fufficient room for rifing in the manner which is the mod natural and proper for them, and for preventing the in- jury they may fudain by danding too clofe in the rows or otherways. Due, early, and proper thinning out of crops and plants, is of courfe a matter of confiderable importance and utility in the garden culture of different forts of vegetables, trees, and other produftions of the fame kinds. Thinning and Hoeing Machine for Turnips, that fort of implement or machine which is contrived for the purpofe of thinning or fetting out this as well as other limilar kinds of crops that dand in rows. It is made light, and condruded fomewhat in the form of the plough, having a fuitable ap- paratus fo attached to it behind as to be put in motion, and drike out the fupernumerary plants as the horfe proceeds regularly along the intervals of the ridges. The horfe is driven by the perfon who holds and direfts the tool while at work. It is capable of going over a very confiderable fpace of ground in a (hort time, and if found, on the refult of further trials, to perform the work with due accuracy and correftnefs, will be a very great acquifition to the drill turnip hulbandry, and for different other purpofes of tjie fame nature. THIONVILLE, in Geography, a town of France, and principal place of a didrift, in the department of the Mo- felle. The place contains 5014, and the canton 13,988 inha- bitants, on a territory of 175 kiliometres, in 27 communes ; formerly belonging to the duchy of Luxemburgh, and ceded to France by the treaty of the Pyrenees in 1659. N. lat. 49^21'. E. long. 6° 1 5'. THIORSAA, a large turbid river of Iceland, on the road from Skalholt to mount Hetla, the courfe of which is nearly from N.E. to S.W. In its paffage over rugged maffes of lava rifing abruptly from its bed, this river dalhes among the rocks, and forms impetuous rapids and falls. THIR, in Chronology, the name of the fifth month of the Ethiopians, which correfponds, according to Ludolf, to the month of J.inuary. THIRD, Tertil's. See Number and Numeration. TiiiuD, in Mufic. The 3d is the mod agreeable and neceffary T H I T II I ncccITsry concord in counterpoint, tlu-oughout the whole fyftem of praiilical harmony. There are two kinds of thirds ; the major or fliarp 3d, which is four femitones or half notes above the bafe ; and the mi- nor or flat 3d, which is three. Very agreeable nuific in two parts may be compofod, and often is compofed, of thirds only. The 3d is wanted with every other concord, and even dilcord, except the 4th, when it is ufed as fuch with the 2d inftead of the 9th. Dr. Pepufch, in his " Treatife on Harmony," has given curious and ample inftrudyons for the ufe of thirds in com- polltion. It would be a curious inquiry, why a 3d was regarded by the ancients as a tlifcord ; aiid why it is called by the moderns an imperfci} concord. We cannot afford ipace for long difquifitions on every fubjecl of vain and frivolous curi- ofity, among which this would probably be numbered. But it feems as if the ancients ellimatcd the perfection of confo- nances by the fimplicity of ratios in the divifion of the mono- chord ; regarding the odave as the moft perfeft concord next to the unilon, as it was produced by a fimple divilion of a llring into halves, exprelTed by - - - -^ Tiie next in perfection was the 5th, produced by al 3 third part of a firing - - " "j ' After this, the 4th, which was reckoned by the an-l cients not only a concord, but a perfed concord, ex- > ? preifed by the ratio of - - . . j A fourth part of a firing gives tlie 15th, or doubled , oftave - - - - "J The fifth pan of a ftring produces the major 3d to' the tjth, which, though in the organ the called the tierce, it is a major 1 7th to the diapafon its ratio is exprefTed by The minor 3d is expreffed by - - - -'- The major 6th, compofed of four tones and a fenii-' E . . . . 5^ ^ tone major, as p : Us ratio is Tl»e minor 6th, compofed of three tones and two' major femitones, as p : its ratio is The extreme (harp, or, as the French call it, the fu- -^ perfluous 6th, compofed of four tones, a femitone | major, and a femitone minor, as p'^L : the ratio of J this 6th is - - - - -"^ We beUeve that the triple progreffion of a feries of perfeft 5lhs made the major 3ds fo extremely harth, that no natural good ear could admit them among the concords. And in the (irft attempts at counterpoint, it was a long time before a 3d was admitted in dtfcant, in which d'latejfaronare and quintonr, or a diatonic feries of 4ths and Jths, now prohibited, was preferred to 3ds and 6ths in fucceefTion. Third Borough, in our Ancient Law-Boohs, denotes a conftable. Third Earing, in Hujhandry, the tilling or ploughing of the ground a third time. Third RJlate. See Estate, Commons, &.c. Third Niglit-awn-hynd. By the laws of Edward the Confeffor, a gucft, who had lain three nights in an inn, was reputed a domeftic, and his hoft was anfwerable for what offence he fliould commit. For one night he was accounted uncuth ; for two nights, guej} ; and the thh'd, awji-hynd, or hogen-hyne. " Prima node incognitus, fecunda hofpes, tertia domeflicus ccn- fetur." Third Order, a fort of religious order, that obferves the 7 jd toT ftopf , ifon : f 5 :} fame rule, and the fame manner of life, in proportion as fome other two orders inftituted before. The third orders are not originally religious orders, but afTociations of fccular, and even married pcrfons, who c<(n- form, a» far as I'v ir condition will allow thtrn, to the dellgn, intention, and rul.-s of a rehgious order, wiiich affociates and direifls tliem. The Pi-a?mon(lrantes, Carmelites, Auguflines, and Fran- cifcans, diipute among themfelves the honour of having firft introduced third orders ; but the prrtenfions of the lail ap- pear to be the bell founded. The firfl contend, that the third order of Prxmonflrantes began in the life-time of their founder'St.Norbert, who died in 1 134. F. Diego dc Coria Maldonado, a Spanifli Carmelite, who has a particular treatife on the third order of Carmelites, de- rives them immediately, as well as the Carmelites tlicmfelves, from the prophet Elijah. Tlie third order of Auguflines, if we credit F. Bruno, was inftituted by St. Auguftine himfelf ; but the arguments he produces are fo frivolous, that F. Helyot obferves, they are not worth refuting. The third order of Franeifeans was inftituted by St. Francis in 1221, in favour of people of both fexes ; who being fmitten with the preachings of that faint, demanded of him an eafy manner of living a Chriftian life ; upon which he gave them a rule, the conftitutions of which are not now extant, as written by himfelf, but only as reduced and confirmed by pope Nicholas IV. fjxty-eight years afterwards. Thofe of the firft order of this faint are the monks called Minor Friars, comprehending the Cordeliers, Capuchins, and Recolleds ; the feeond comprehends the nuns of St. Clare ; and the third, feveral perfons of both fexes, who live at liberty : and thefe are what we call the third srder. See Franciscan's, &c. Of this order, which was only cftabHflied for fecular per- fons, feveral of both fexes, to attain the greater perfection, have afterwards commenced religious, and formed various congregations, under various names ; as " Religious Penitents of the Third Order," &c. Third Point, or Tierce-point, in Archite&ure, the point of feftion in the vertex of an equilateral triangle. Arches or vaults of the third point, called by the Italians diterzo acuta, are thofe confifting of two arcs of a circle meeting in an angle at top. See Arch. Third Point, in Per/pellive. See PoInt. Third Rate. See Rate. Third Subftdy Duty. See Duty. Third Sound, in Mu/ic. See Terzo Suono, Tartini, and Stillingfleet. Third Tear, Tithe of the. See Tithe. THIRDENDALE, a liquid meafureufed at Saliftjury, containing three pints. THIRDINGS, the third year of the corn or grain grow- ing on the ground at the tenant's death, due to the lord for an heriot, within the manor of Turfat, in Herefordfhire. THIRLAGE, or Thirlage to Mills, in Rural Economy, a contraft or power authorized by law, to prevent the te- nants of certain diflridls from carrying their corn to be ground any where elfe than at a particular mill. It was a praftice which formerly prevailed much ; and it was too often ufed as an engine of oppreffion, that proved extremely galhng to thofe who were obliged to fubmit to it, but which at prefent is nearly, if not wholly done away, except in certain places. The account of the origin and nature of this opprcflive practice. THIRLAGE. praaice. wKicl. t.a» oeon g'ven by the author of the ongina^ A.rncultural Si.r»fy of Eaft Lothian, n the latter diftr.ft of%untn', may not be umnt.-rofting to ..-,n curious .nquirer. It is concoircd'thatther.-, in former times, corn was reduced into meal, as in ancient Rome, by a hand '.m\\, which was called a gufn, ; and which was ufed in the nmote parts ot the Highlands of Scotland long after the yoar 1745. It is certain, however, that the water machme called the miU, for the grindin-ofcats into meal, is of high antiquity in the fame country ; a'^nd as it was introduced before the period of record, it may he fairly faid "caput inter nubiliacondit. Hut from the ancient name of one of tlie duties, bwvrjbp, which will be afterwards explained, the mill would feem to be of Saxon original. „• n- , It feems alfo natural, that a perfon who ponefied a itrcam of water upon his cilate, (hould be invited by his neigh- bours to be at the expence of ercfting a mill upon this ftream ; and that they, on the other hand, (liould th:rle, that is, aftrici and bind their lands, in all time coming, to ule ai.d frequent this mill with their corns, and to pay a certain pro- portion of the meal according to the univerfal mode then pradifed of paying in kind for the grinding of it. Ancientiv, it is contended, there is reafon to beheve, the iniUs were at firfl erefted upon ecclefiaftical lands, and be- longed to the clergy. It is Hated, that there are three different fpecies of this fort of fervitude known and acknowledged in the law of the above country ; but of thefe, two only belong properly to rural economy ; however, in order more thoroughly to under- Aand the fubjedl, tlic whole may be fliortly explained. It is noticed, that the firft and the Ughteft fpecies of thirlage, is called the thirlage of grhuialle grain, and it means tliat the tenants and poflefTors of the aftricled lands (in the law of the above country the fcrvient tenement) fhall be obliged to refort to the mill (the dominant tenement) to which thefe lands have been aftrifted, with all the oats and barley they (hall ufe for food, and there pay certain dues for the grinding of them. Th'; fecond, and the oppreflive thirlage, is, it is faid, called the thirlage of growing corn. By this covenant of thirlage, it is ftated, that every ounce of corn produced upon the fervient lands, let the quantity be ever fo great, mull be brought to the dominant mill, and there manufaftured into meal, and the covenanted or accuftomed duties paid. It is fuggefted, that the only limitation that this fevere thirlage admitted of, was in favour of feed and of horfe com. Sometimes a fpecial covenant was made, by which the poffenors of the fervient lands paid what was called dry multure ; that is, they paid a quantity of corn to purchafe tlie freedom of going to market with the remainder in the fame ftate ; and where conftant immemorial ufage has fanc- tioned this cuilom, the courts of law generally, it is faid, have fo far mitigated the feverity of this fpecies of thirlage, as to find, that the proprietor of the dominant mill can de- mand no more than that quantity of dry multure, which the immemorial ufage has eftabliftied. Such decifions are aflerted to be grounded upon the principle of a prefumed contradl, of which the record or memory has been loft betwixt thefe parties, whereby the one agreed to pay, and the other to receive, the commutation fixed by the ufage. The third and laft fpecies of thirlage h, it is obfei-ved, called the thirlage of in-vraa et illata, and belongs properly to urban tenements : the meaning of it is, that corn, wher- ever produced, if brought for confumption within the bound- aries of the dominant mill, mull be carried to the mill and manufaftured there, and pay the accullomcd duties. It is ftated that this fpecies of thirlage exifted in mod of the boroughs of the above country ; and that the mill generally belongs to the incorporation, wliere the borough holds direftly of the crown, or what are called royal boroughs. But where a borough holds of a fubjeft fuperior (the lord of the manor), the mill generally belongs to the fuperior, and the accuftomed duties are paid to hii.i, or to his tenant in the mill. It is to be obfcrved, the writer fays, that in all thefe tliirlages, it was the land of the fervient tenement that was bound ; and that although it fliould pafs by purchafe through twenty different hands, every purchafer, and all his people upon thefe lands, were equally bound to fre- quent tiie dominant mill. It is further noticed, that there were alfo three different fpecies of duties paid at the dominant mill ; as, firft, the multure [tmdtura, grinding) ; fecondly, the beinnock (loaf) ; and, thirdly, the kna-ucjlnp. It is remarked, that the firft of thefe duties belonged to the heritor and proprietor of the mill ; and feems evidently to have been the iine or premium, originally fettled, as the inducement for his being at the expence of ere&ing the mill, and for fupporting the machinery of it in future. The bannock v.-as the duty paid to the miller ; and the hnavejhip the duty paid to the under fervants in the mill. It is ftated, that the quantity of meal paid under the name of multure, varied confidcrably in different counties, and even at different mills. It has been known as Wgh as the eleventh boll, and fometimes as low as the twenty- fecond boll ; and in one particular inftance fo fmall as the thirty-fecond : but it may be taken, on the average, at nearly the feventeenth boll. The other duties were alfo various ; but they may, it is fuppofed, be taken jointly as equal to the half, or from that to three -fourths of the multure. But wholly independent of thefe feveral duties, the pof- feffors of the fervient tenement were, ■ix is faid, bound to perform certain perfonal fervices to the mill and its append- ages : for inftance, when the dam-dyke, or the rampart that direfts the ftream of water from the river to the mill wanted repair, or when the aquedufts to and from the mill required to be fcoured, the people of the fervient tenement muft turn out and perform thefe works. When the roof of the houfe in which the mill ftood decayed, they muft find thatch for making that repair, and they muft put it on. When grind-ftones were wanted, or an axle, or any other part of the machinery that required a heavy carriage, they muft go with their horfes and carriage to the neareft place (whatever might be the diftance) to bring thefe articles to the mill. But this fpecies of thirlage, it is believed, never was known in the above county ; or that at leaft, if it was, it has long fince been forgot. Befides, it is noticed, that there was another circumftance peculiarly fortunate, which put it in the power of moft of the landed proprietors of that county, without difficulty, to emancipate their tenants from the thirlage even of grindable grain, namely, that the landlord almoft univcrfally was proprietor both of the domi- nant and fervient tenement ; and that as he aftrifted his tenants to his own mill by a covenant in the leafe, progref- fively as the leafes of the mills expired, the landlords in general emancipated their tenants from every Tpecies of thirlage, at a converfion of twenty fhillings per plough, which was paid by the tenant?; and he and his fervants were left at perfeft freedom to refort to any mill, where they could get their work beft done, and at the loweft rate. The cafe, however, it is remarked, was widely different T H I T H I in many parts of the north of the above coHntry ; and it is known, from what has already been mentioi.vd, that there were many eltatcs, or fer-vient ieneituti's, belonging to one proprietor, which were allridled to mills, or the dominant tenements, belonging to another proprietor, and that not a few of thcfe thirlages were the fevere one of groiuing corns. The writer does not think it here neceflary to inquire whe- ther thefe mills were originally erected by the clergy, and fince the reformation in religion, have pafTed into the hands of laymen ; or whether, perhaps, if mills are truly of Saxoii origin, they were generally, and at once introduced into the above country, when under the Saxons, wlio certainly •were, it is thought, a more enlightened people than the Scottifli and Piftidi inhabitants of the North, whole igno- rance, of courfe, may have led them more generally to fub- jeft thcmlelves in the fervitude of thirlage, to invite their clergy, or a few of the more wealthy among them, to undertake the arduous talk of erefting mills. From the near analogy betwixt tithes and thirlage, it has appeared to the writer a matter of juft furprife, that the parliament of the above country, which, in the courfe of a preceding century, firft authorifed the valuing of tithes for the purpofe of fixing a modus of payment, and after- wards compelled the lay titulars (proprietors) to f?ll their tithes at nine, and in fome cafes at fix years' purchafe, to the proprietors of the lands, did not introduce a fixed modus for thirlage, which certainly operated like tithes, as a tax upon induftry, to bar, or at leaft to retard agricul- tural improvement in its progrefs. Sec Tithe. THIRLBY, Styan, LL.D. in Biography, a learned critic, was born about the year 1692 at Leicefter, and iir.iflied his education at Jefus college, Cambridge, blending promifing talents with felf-conceit, litigioufnefs of temper, and a habit of intemperance. He appeared at an early age as a writer of controverfial pamphlets, and thus acquiring fome degree of reputation, obtained the fellowfhip of his college at the age of about 2 1 years. In maturer Ufe he probably applied to Itudy with greater dihgence, for his edition of Juftin Martyr, to which he was indebted for literary reputation, was publifhed in 1722. Verfatile in his difpofition, he diverted his attention at this time from divi- nity to phyfic, and accepted the port of librarian to the duke of Chandos. In this ftation he continued for a fhort time, and being under a neceffity of quitting it, he became firft a ftudent in civil law, and afterwards in common law. Weary of thefe purfuits, he refided in the houfe of his former pupil, fir Edward Walpole, by whofe intereft he obtained a finecure place in the port of London, of the value of about 100/. a-year. Upon leaving this afylum, he took private lodgings ; but continued to indulge his habit of fotting and intoxication. He is faid to have contributed fome notes to Theobald's edition of Shakfpeare ; but his felf-indulgence and indolence rendered him unfit for mental exertion, and he doled his career in December 1753. His edition of Juftin Martyr, cenfured by fome, but regarded upon the whole as a valuable performance, contains Juftin's two apo- logies, and his dialogue with Tryphon the Jew, Greek and Latin, with notes and emendations by the editor, and feledl notes by former editors. Nichols's Lit. Anecd. Gen. Bio^. THIRLWAL Castle, in Geography, a boundary fortrefs between England and Scotland, on the PiAs' Wall ; 3 miles N.W. of Haltwefel. THIRON de Gardais, a town of France, in the de- partment of the Euve and Loire, 21 miles S.W. of Chartros. Vol. XXXV. THIRSK, or Tmrusk, a borough and market -town in the wapentake of Birdforth, North Riding of the county of York, England ; is 23 miles N.W. by N. from the city of York, and 223 miles N.N.W. from London. It is fituated in a plain, nearly furrounded by hills, on the banks of a rivulet c?lled Cod-beck, which divides the town into two parts, refpeftively named the Old Town and the New, which are connedled by two fmall ftone bridges. The two towns are diftindl, as far as relates to the eleftion of mem- bers ; but in all other refpcfts are confidered as one. The civil government is vefted in a bailiff, annually chofen by the burgage holders. The New Town ftands within the precinfts of the ancient caftle of the Mowbrays. In the centre of the town is the market-place ; which would be one of the fiueft in the county, were it not for the tolbooth and Ihamblcs, now in a ruinous condition. The market is held on Mondays, and is well fupplied with all kinds of provifions. Five fairs are held annually for liorned cattle, fheep, leather, and woollen cloth. Thefe fairs attraft a confidcrable number of dealers, and, with the advantage of the great North road from York, are very beneficial to the town, and in fome degree fupply the want of maimfaftures, of which here are only a fmall quantity of coarfe linens and facking, and a few bridles and faddles. The population, as returned to parhament in the year 181 1, confifted of 2155 perfons, occupying 549 houfes. The parifh church ftands on a rifing ground at the northern extremity of the town. The roof, which is elliptical, and of oak, orna- mented with carving, is fupported by a double row of pillars and pointed arches. In the fouth wall of the chancel, near the altar, are three ornamented ftone feats. The church is generally fuppofed to have been built out of the ruins of the ancient caftle, which was demoliftied in the reign of Henry II. A moat and rampart are ftill to be feen, but no veftige of the building remains ; and in Camden's time, it was nearly in the fame ftate. It had once, however, been a place of great ftrength, when held by the potent Mowbray family. It was here that Roger de Mowbray began his rebellion againft Henry II. and joined the king of Scotland againft his own fovereign. The revolt was fupprefled, and the caftle of Thirdv, as well as feveral others belonging to the rebellious lords, were by the king's order deftroyed. Be- fides the pai-ifh church, the Calvinifts, the Quakers, and the Methodifts, have their refpeftive meeting-houfes. Here is alfo a School of Induftry for poor girls, who are clothed and taught reading, writing, and arithmetic, plain work, knitting, &c. That divifion of the town called Old Thirjk, is a borough by prefcription, and returns two members to parliament. The right of aleftion is in the occupiers of burgage tene- ments, now only fifty in number, of which forty-nine are the property of fir Thomas Frankland, bart. Old Thirflc confifts of a range of cottages on each fide of the turnpike road leading from York to Stockton, and of two fquares furrounded by the fame kind of buildings. In one of thefe fquares, called St. James's Green, the cattle fairs are held ; the other is the fcite of an ancient church, of which, time has long fince fwept away every veftige. In the latter of thefe fquares is an elm-tree of venerable antiquity, from which the place takes its name, Hawm (that is Elm) Green ; and under the fliade of whofe branches the mem- beis of parliament are elefted. One of the cliief incon- veniences of Thirflc and the adjacent country, is the fcareity and high price of coal, which is brought from, the county of Dui'ham in fmall carts, containing from eighteen to twenty- two bufhels, varying in price according to the feafon. In the vicinity of the town is Byland abbey, which was 3 Z founded T 11 1 Uiib4lr«l m the year 1177, by Roger ik Mowbray, when a ftiltly monaftcry and church wire ercftcd, aiiJ drilicatcd to ihe Virpjiii Mary. This abbey continued to flourilh till the general dilTolution in 1540, when the fcitc and mod of the demefnes were granted to fir William Pickering. At prefent, the ruins and fcite belong to the honourable family of Stapylton. Near the bafe of the H.-imbleton hill,;, within four miles of Thirft, is Thirkleby-Hall, the feat of fir Tliomas Frankland, bart. The walks and pleafiire-grounds are cx- tenfive and well laid out ; and the houfo is an elegant mo- dem ftruAure. — Beauties of England and Wales, vol. xvi. Yorkftiire ; by J. Bigland. THIRST, a painful fenfation, occafioned by a vellica- tion of the nerves of the throat or fauces, and producing a defire of drinking. See Dioestion. Third may be fometimcs eluded by rolling a clean bullet or a pebble in the mouth, which occafions an extraordinary iffue of faliva to moiften the ttu'oat, &c. Mr. Boyle mentions a man who could eafily abftain fi-om drinking for nine days, and yet have his diet nothing more liquid than ufual ; the fecretions of urine, fweat, &c. being performed all the while regularly, and in the fame quantity as ufual. In dropfical cafes, where there is not a right fecretion of the urine by the renal glands, and tlie vcffels and parts of tJie body are loaded with too great a quantity of ferous humours, a great moderation in drink might be attended with good fuccefs, provided fomc liquor could be found out to allay that uneafy fenfation. Probably this would be beft performed by mucilages acidulated with fpirit of vitriol or fulphur, or jellies with juice of lemon, &c. and that a fmall quantity of fuch a compofition, now and then ufcd, might be of as much real fervice, in quenching third, as draughts cf liquors, which increafe the fymptoms. In feverifh diforders, the patient is frequently tormented with a violent third, which is moderated by acidulating the barley-water, or fage-tea, with fpirit of vitriol, or with lemon-juice : but by nothing fo much, as allowing the patient fome dices of an orange. Pringle, Obferv. on Dif- cafes of the Army, p. 135. THIRSTY Sound, in Geography, an inlet or bay on the N.E. coad of New Holland, fo called by Cook in 1770, becaufe it afforded no fre(h water. It lies in S. lat. 22° 10', and W. long. 210' 18'; and may be known by a group of fmall iflands lying under the (hore, from two to five leagues didant, in the dircftion of N.W., and by another group of iflands that lie right before it, between three and Four leagues out at fea. In this inlet is good anchorage in 7, 6, 5, and 4 fathom ; and here are places very convenient for laying a fliip down, where, at fpring-tides, the water does not rife lefs than 16 or 18 feet. The N.W. point of Thirdy Sound was called " Pier-Head." THIRTEEN Islands, a cluder of iflands in the Pacific ocean, among the New Carolinas, fo named by Capt. Wilfon. N. lat. of the mod foutherlv 7° 16'. E. long. 144° 30'. THISATON, a river of Canada, which runs into lake Huron, N. lat. 46^ W. long. 84°. THISMA, a name ufed by fome for any fubterranean vein, or bed of a mineral. • .J^^S'^'LE, in Agriculture, a well-known prickly trou- bleiome weed, common in corn and other fields. It has been obferved, that wherever thidles grow naturally, it is a iure fign that the land is ftrong, and of a tolerable good quality ; but that they ai'e at the fame time a great annoy- aace to every plant intended to be cultivated. And it has T H I alfo been well remarked, that there are no weed-plants over which the economical farmer ought to keep a more watchful eye than the thidlc tribe, as they are not only wholly ufe- lefs, but occupy much ground, and being furniflied with downy feeds, are capable of being multiplied and car- ried almod to any didance. Befides, they do much mif- chief by impeding the work both in handUng hay and corn crops. It is of courfe a matter of much confequence to be well acquainted with the qualities of each kind, in order to enable the farmer to judge with certainty how far and by what means their dedrudlion may be effefted in the moil certain and ready manner. There are a great many forts of thidles ; and thofe which chiefly dcfcrve the attention of the farmer, are the annual, biennial, and^crennja/ kiuds. There are four of thefe plants belonging to the fird divi- fion or fort, namely, the mujk-thijlle, which grows to the height of two or three feet ; the heads hang down, and the flowers fmell fomewhat like muflc. It is frequently found occupying whole fields, particularly where the lands are of a chalky or barren quality ; and fending forth flowers in July and the following month in great abundance. The milk-thijlle, which is found plentiful in mod wade places, and upon old banks, being well known by its beautiful large leaves, which are variegated with white fpots and veins, as if they had been fprinkled with milk. The flow- ering feafon of this plant is in Augud, or thereabouts. The ivelted or curled thidle, which is frequently met with on banks, and by- road-fides, but feldom intruding itfelf into fields or paftures. Its time of flowering is June and the following month. See Carduuj. And the common foiu-thiflle, which is a very troublefome weed in fields and gardens ; it is found in fome fituations that the plant is fmooth, but in others that it is rough, being prickly on the margins and mid-ribs of the leaves, and alfo on the peduncles and calyces of the flowers, and the dems or dalks abound with a laftefcent or milky juice. See SONCHUS. But in the fecond divifion, or biennial kind, there are not more than three, as the /fear or bull-thifih, which rifes about three or four feet in height, the extremity of each leaf running out into a long fliarp point, remarkably prickly : hence, in fome places it is called by the name of the buU- thidle. It has large heads of flowers, and commonly grows by the fides of roads, near dunghills, and not unfrequently in fields and padures, flowering in June and the following month : the marjh-thijlle, which grows very tall and prickly, having numerous heads of flowers, fmall and of a red co- lour, growing abundantly in wet meadows and in woods, flowering in July and the month which fucceeds it. See Carduus. And the cotton-thijlle, which is found plentifully in uncul- tivated places in many parts. The roots are long and fibrous, and fend forth (everal oblong ftiarp-pointed whitifti- green finuated leaves, covered with a cottony down, and fet with fpines on tlieir edges. In the middle of thefe ftioots up a ftalk, to the height of five or fix feet, divided towards the top into diverfe branches, fet with leaves at their joints, and having jagged, leafy borders running along them, edged with fpires, as has the main dalk alfo. Each branch terminates with a fcaly head of reddifh purple flo- rets, having narrow tubes, and cut at their brim into five teeth. They contain flowers, which are fucceeded by fmall oblong feeds crowned with down. The time of its flowering is about July, for the mod part. See Onopor- DUM. And in the third divifion or fort there are only two ; as the THISTLE. the corn fotu-thi/lle, wliicli is a very troublefome weed in arable land, flowering in July and the fucceeding month. See SoNCHUs. And the common or fcU-thi/lle, which has many provincial names in different places, as the horfe-thijlle, the cltrfed thyile, &c. This is a tliiftle which is more general in its growth than any of the others, being found not only by the fides of roads, bnt alfo in arable and pafture lands, and it is remarkably prickly, growing from two to three feet in heiglit, but the heads of the flowers are fmall, and of a purplifli colour, though fometimcs white ; it flowers in July, or about that period. See Carduus and Seura- TULA. It is obvious, from what has been faid, that the annual and biennial forts of thiftles may be readily removed, by preventing their rumiing to feed and difleminating them- felves over the land ; wliich is bed effefted probably by carefully eradicating them, or frequently mowing them over clofely by the furface, and rolling. But in the perennial forts, from their roots continuing in the earth, increafing and throwing out new flioots or Items every year, there is mTich more difSculty in extirpating them, and they, perhaps, can be no other way completely deftroyed than by rooting them out on arable land by trench or deep ploughing and frequent harrowings, or by fallowing or laying the land down to pafture ; for the firft of thefe forts feldom appears in pafture lands. But for deftroying the common thiftles, the beft method is perhaps by cutting them over in the bleeding feafon frequently by proper implements. The writer of the Berkfhire Agricultural Report, who thinks tliem particularly noxious, troublefome, and inconvenient among the corn and grafs crops, propofes drawing them up by an implement of the forceps kind, fomewhat fimilar to that defcribed under the head noticed below, efpecially the fort which is termed ferratula arvcnfis ; or if they be cut over about an inch above the furface of the ground, it is believed they will be liable to rot, on account of the ftem being filled with water. They alfo frequently bleed to death when cut over in this way about the month of Au- guft, as hinted at above. See TmsTl.^-Dra'wer. Others fuggeft that thiftles might probably be deftroyed in arable land by continued fallowing for one or two fum- mers ; with fuch repeated ploughing and hoeing as wholly to prevent their vegetating : but as fuch a progrefs would be tedious and expenfive, an eafy, expeditious, and effectual mode of eradicating them in this cafe, feems equally want- ing and defirable, as in that of grafs lands. Thiftles are likewife very troublefome in hedges, efpecially thofe of the fow and the large rough kinds, and ftiould conftantly be rooted out and removed as foon as pofFible, as no hedge can go on well that is much infefted with them. See This- TLZ-Cutter, Weed, and AVeeding. It may be noticed, that by an excellent regulation in France, a farmer may fue his neighbour who neglefts to tliiftle his land at the proper feafons, or may employ people to do it at the other's expence. And it were to be wiftied that a fimilar law was enafted here, to prevent the wide- fpreading mifchief occalioiied by the feeding of this per- uicious weed ; among which may be reckoned, befides its choaking the young corn, that if wheat in particular be not well thiftled, the reapers take up the grips fo tenderly, left they fhould prick themfelves, that by their loofe hand- ling of them, they fometimes leave upon the ground corn enough to fow the whole field. There is much in- convenience often experienced too in working hay from them. Something in the fame way as above has alfo lately been done here, efpecially in reg^d to the removal of them from the fides of highways and roads. Though the fow-thiftle has commonly been confidered as a troublefome and injurious weed in tillage lands, it has lately been conceived by fome to poflefs no fmall degree of nutrient power ; and on this ground it has been fuggeftcd by the writer of the " Experienced Farmer," that it may be a plant of confiderable fattening properties when properly raifcd and cultivated. When taken young, and cut or broken, it produces fomething, it is faid, like cream ; and he has noticed that many animals eat it in preference to every other plant now in vogue. Sheep, when in clover, &c. v^-jU feed upon it fo greedily as to cat the very roots. P'gs likewife prefer it to almoft any other green food. Rab- bits will breed more fpeedily when fed with fow-thiftles, than with any other food he knows of, except dandelion ; which is of the fame nature : and is now fold in Covent Garden market to the breeders of tame rabbits, to make the does take buck more readily. A man of his acquaint- ance, who was allowed better flcill with ftallions than the generality of people, ufed to fearch for fow-thiftles, and give them to his horfes to make them fer«re mares more readily and effeftually. When he could not get fow-thiftles, he fed them, it is faid, with new laid eggs and milk, or cream, if he could get it ; but he preferred fow-thiftles or dande- lion to any thing. And there is, he contends, a well-known and remarkable proof of the nourifhing and feeding quality of the Cow-thiftle, in the fat wether fheep fed to fuch an amazing fize by Mr. Trimnel, of Bicker-fen, near Bofton, upon fen-land. This ftieep, it is faid, was bred by Mr. Hutchinfon, in Hail- fen, from a ram bred by Mr. Robinfon of Kirby, near Sleaford. He never ate any corn, oil-cake, or other fimi- lar dry food, but fed wholly on grafs and herbage. Being turned with many other ftieep into a field of clover, he was obferved firft to fearch for the fow-thiftles, and would eat no other food while any of thefe could be found in the parts of the field that were hurdled off" fucceflively, a little at a time. None of the other ftieep that fed with him, how- ever, ftiewed any extraordinary liking for the fow-thiftle. A fmall hut was built for him in the field to repofe under in hot weather : and when the part that was hurdled off" be- came bare of food, his attendants, on account of his liking for fow-thiftles, gathered a quantity of them for him, which they gave him at particular hours, three times a day, from two to five pounds at a meal. It is added, that when ftanding on his feet, he meafured only two feet fix inches high : he was weighed once a month, and weighed ahve twenty-fix ftone, at fourteen pounds to the ftone. He gained only one pound the laft; month : and as it was judged, therefore, that he was quite ripe, and would not increafe any more, but might polfibly lofe weight the next month, he was killed on the 13th of Oftober 1 79 1, by Mr. Ifaac Lumby, of Bicker, being then a four-lTiear, or four-year-old ftieep. The writer further ftates, that the flfin, hung up by the nofe part, meafured ten feet two inches from the point of the nofe to the tip of the tail, and was fold for 7^. 6J. in the common courfe of bufinefs. And that the carcafe mea- fured five feet from the nofe to the tail ; the rump or cufliion eight inches and a half in depth ; plate or fore-flank the fame thicknefs ; breaft end feven inches ; and was one yard five inches and a half round the coUar. That the legs were reckoned at 4olbs. each ; but if cut haunch of venifon faftiion, they would, it is faid, have weighed ^olbs. each. Mr. Lumby was offered 2s. a pound for them ; fo that he oc^ild have fold the two legs alone for 10/. when fo cut. 3Z 2 This T H I Th'i-i i^ ccrtairly a remarkable inftance of fatnefs, but it might probably depend more on tlie difpofition of the ani- mJ to take on fat, than the fattening quahty of the thiftlc or food on ^ellich tlie (hcep was fed. Many further trials are nocefl;u-v to fully afcertain the point. Tms PLR, Bl'fftit, carjuui btnediaus, vel cnicus. See Cr.x- TAfllEA. As an article of the Malcria Medica, the bleiled thiltle, which is tlie hair)' \rAi cnicus of Miller, and the centaurea ifwHifla of Linnxus, was formerly much ufod in infufion, as a gentle emetic, in fevers and certain naufeas. Dr. Lewis has often obfervcd excellent efFefts from a light infufion of caiduus, in weaknefs of appetite and in- digeftion, where the ftomach was injured by irregularities, or opprclTed by vifcid phlegm ; nor has he found any one medicine of the bitter kind to fit fo eafily on weak ftomachs, or to heat fo little. Thefe infufions, taken freely, promote the natural fecrctions. Drank warm in bed, they com- monly increafe perfpiiation or excite fweat ; and as they aft with great mildnefs, not heating or irritating confider- ably, they have been ufed, in this intention, in acute as well as chronical cafes. The feeds, which, as well as the leaves, have a confiderably bitter tafte, have fometimes been ufed as fudorifics or diaphoretics, in the form of an emulfion. Cold water poured on the leaves, extrafts, in an hour or two, a light grateful bitternefs ; by Handing long upon the plant, the liquor becomes dlfagreeable : a ftrong decoftion is very naufeous and.offenfive to tlie ftomach. The ex- traSs, obtained by infpiffating both the cold infufion and decoftion, have the fame differences as the liquors them- felves. Redtified fpirit extrafts, in a (hort time, the light bitter part of this plant, but does not take up the naufeous near fo eafily as water. On keeping the watery extracts for fome months, a confiderable quantity of fallne matter was formed on the furface, in fmall cryftals, refembling in Ihape thofe of nitre, in the tafte bitteri(h, with an imprcffion of coolnefs. Lewis's Mat. Med. See Centaurea Bene- diSa. Some diftil a water from it, which they ufe in cordial and fudorific potions. Thistle, Carline. See Carlina. The root of the carl'ma acmilis of Linnaeus, is fuppofed to be diaphoretic, antihyftcric, and anthelmintic. It has been greatly cfteemed by fomc foreign phyCcians, in acute malignant as well as in chronical difeafes, and given in fub- ttance from a fcruple to a drachm, and in infufion from one to two drachms and more. It is rarely to be met with in our (liops. See Carlina Caulefcens. Thistle, Bijlaff. See Atractylis. The roots of the atra^ylis gummifcra of Linnaeus, or pine- thiftle, which is a native of Italy and the ifland of Candy, yield, if wounded when frefh, a vifcous milky juice, which concretes into tenacious maffes, at firft whitifh and refembling wax, but when much handled growing black ; fuppofed to be the ixion, and acanthina majliche of the ancients. The juice is faid to have been formerly chewed for the fame pur- pofes as maftich, and the root itfelf of the fame virtue with that of the carline thiftlc. Lewis. Thistle, Fijh, a fpecies of C three-quarters of an inch above the furfacc of the ground. In cafes whi.'re the fcythes waat fhaviiening, it is obferved that they may be i-'ared perpendiciUily up, or taken off entirely ; and that, at the fame time, the horfes ftiould be ungeared and taken away. In ufing the machine, it is advifed by the ingenious in- ventor, tliat as foon as the thiftles are in full flower it fliould be fet to work, the length way of the ridges ; and that if the fcythes are kept very fharp, it will make excellent work. And when the thiftles have been cut, they fliould lie a day or two, it is faid, to perifli by the lofs of their fap-juice : the ground muft then be cleared, and the clofe or field rolled, the crofs way of the ridges, with a very heavy roller, which fo crufties the hollow ftumps, and renders them fo per- vious to water, that their roots foon rot and are defl;royed. But to expedite the operation of the implement, and the dc- ftruftion of the weeds and plants, the land fliould be cleaned of all kinds of rubbifli, the latter end of March or begin- ning of April, being drefled with the fward-drefl^er, and then rolled the crofs way of the land, or ridges, v>'ith a weighty roller, as juft mentioned. See S\v arv-D rcffer. THISTLE-Draiver, an ufeful implement of the forceps kind, which is extremely beneficial in drawing up the com- mon field-thift;le and fonie other ftrong forts of weeds. It may be conftrufted either of wood or iron, in the latter cafe having fockets for receiving wooden handles. When made of wood, it fliould be of the hard and lefs brittle kind, as good tough afli. It is ufually formed from two to three feet in length, having fix notches or blunt teeth cut in each blade, at the bottom part, where it bites or feizes the plants, and each arm well fitted to the other, turning upon a ftrong pivot or pill. In its operation the thiftle is feized clofe to the ground and firmly held, fo as to be drawn out with confiderable length of root. It has been long in ufe in the northern parts of Lancafliire ; and is faid to be lately intro- duced from Wiltshire into the county of Gloucefterfhire, in the agriculture report of that diftrift. It is an ufeful and efFedtive tool for the above purpofe, and only cofts about two {hillings when made of wood, and three or four when of iron. It has long been known in the firft of the above counties by the provincial name of Gripes. TmarLE-Fly, in Natural Hijlory, a fmall fly produced from a fly-worm hatching in the protuberances of the car- duus hsEmorrhoidalis. In the protuberances of this thiftle, while they are clofed in all parts, the worm of this fly, from whofe injuring it, at the time of depofiting the egg from which it was hatched, the protuberances arofe, under- goes its lail transformation. It here makes of its own fliin a fliell in form of an egg, within which it puts on the nymph ftate. When this nymph becomes a living fly, the leaft pai'l of its diiBculty is the finding its way out of this ftiell ; it has a ftronger prifon than that, and before it can obtain its liberty, muft force its way through the much more clofely compadled fibres of the protuberance of the vegetable. It has, however, no other means of doing this difficult work, but that of inflating its head, and throwing out the bladder or muzzle with which all thefe creatures are provided in this ftate. See TH1STLE-Ga&. This is a difficult operation, and many of the creatures pcrifli in the attempt ; but v.hat much forwards the fuccefs of it, in many calcs is, that the ftalk of the thiftle often becomes naturally half rotten before the time of the fly's egrefs. Reaumur, Hift. Inf. vol. iv. p. 338. T M I Thistle-Go///, a name given by the more ac<.ii*atc au- thors to the protuberances on the ftalk of a fpecies of tliiftle, called by authors carduus hiimorrhoidcilis , from thofc tubercles, which are fuppofcd to refemble thofc of the lis- morrhoidal veins in perfoiis fubjedl to the piles. Thefe have been fuppofed a natural produftion of the plant ; but they are far othcrwife. The whole hiftory of them is, that a certain fpecies of fly always dcpofits its eggs on the ftalks ; and the young ones, when hatched, gnaw their way into the fubftancc of the ftalks, and the copious derivation of the juice, oecaGoned by their fucking, produces the tu- bercles which are found on it. Thefe tubercles are of a roundifli or oblong figure, and are of various fizes, from that of a pea to the Ligncfs of a nutmeg ; they are much harder than the reft of tlie ftalk, approaching to a woody ftrufture ; when cut open, they are found to contain each feveral oblong and narrow cells ; thefe have no communication with one another, and are eacli inhabited by a fmall white worm, which has two hooks at the head ; with thefe it breaks tlie fibres of the plant, in order to get at its juices. When it has arrived at the time of its change into the nymph llatc, it ceafes to eat, and drawing up its body much fliorter than ufual, its flcin hai-dens, and forms a fhell, under which it changes into a very beautiful two-winged fly ; the wings are whitifli and tranfparent in the middle ; and at the edges furrounded with black in the form of a chain of figures Uke the letter Z ; the body and breaft of this fly are of a beautiful black, with fome flight variations of yellow, with which the flioulders are ftreaked ; the anterior part of the head is white, aud its back-part edged with a yellow down ; the antennas are reddifli, and the legs are partly black, and partly of a fine clear brown. In obferving the changes of the worms of thefe galls, there are often obferved fome which go through them in a different manner from the reft, and finally produce a very different fpecies of fly. Thefe are the progeny of the eggs of fome other fpecies of fly, whofe worm being carnivorous, is lodged by the art of its parents, while it is yet in the egg ftate, in the fubitance of this gall, there to prey upon the defencelefs inhabitants. There are many fpecies of galls the inhabitants of which are expofed to enemies. In thofe it is common to find the proper inhabitant and the devourer in the fame cell ; the one feeding on the juices of the plant, the other on its juices ; but this is not the cafe here, thefe worms imme- diately deftroying the proper inhabitants, and being found always alone in their cells. Reaumur, Hift. Inf. vol. vi. p. 221. Thistle, Order of. See Andrew. Tm.STLE, our Lady of the, was alfo a military order, in- flituted in 3370, by Louis II. duke of Bourbon. It con- fiftcd of twenty-fix knights, of which that prince and his fuccelfors were the chiefs. Their badge was a flt, not Uirowing out foyons, or runners; ufually taller and more numerous ftcnu ; more glaucous herbage ; much fmallrr/i)w«v, whofe jxlals arc eredl, and though variable ill dimci.fions, never a quarter fo large as in monijmim; but above all, in having at leaft three or four fceJs in each cell. The pouiks moreover are always i.umerous, and all perfeft. Their terminal lobes are variable in length or dilatation, but conflantly much Ihorter than the. Jy!e. (See the fol- lowing.) We have often been inclined to remove from this fijecifs to the foregoing the fynonyms of Bauhin, Clufius, and Gerarde, cited in Fl. Brii. on account of the large fprcading petals of their figures. But this ap- pears to be an inaccuracy on their part. The habit of their plant ; {evcTslJlems from the fimpl" crown of the root ; ;uid the copious pouches in long continued clujlers, all pro- perly belong to our alpejlre, by no means to montanum. We have fome fufpicion that the alpejlre is rather biennial than perennial. It never remains long in gardens, but that is no proof, nor have we had an opportunity of watch- ing the plant through a feafon, on its own native hills. Hudfon miftook the perfoUatuin, next defcribed, for alpejlre. 9. Th. pcrjoliatum. Perfoliate Shepherd's Purfe. Linn. Sp. PI. 902. Willd. n. II. Fl. Brit. n. 4. Engl. Bot. t. 2354. Jacq. Aultr. t. 337 ; not. 237, as in Willdenow. (Th. alteram mitius rotundifolium, burfae paftoris fruftu ; Column. Ecphr. 278. t. 276. f. 2. Th. rotundifolium ; Ger. Em. 266. Th. cordatum minus, flore albo, infipidum ; Barrel. Ic. t. 815. Th. tertium pumilum ; Cluf. Hift. V. 2. 131. Th. minus Clufii ; Ger. Em. 268. Naflurtium n. 510; Hall. Hift. V. I. 220. Pilofella filiquata ; Thai. Harcyn. t. 7. f. C, at the end of Camer. Hort.) — Pouch exaftly inverfely heart-diaped. Stem-leaves heart-lhaped, ftiarpith at the bafe, clafping the branched ftem. Style very Ihort. — -Native of calcareous paftures or rocks, walls, and dry places, in Switzerland, Germany, France, Italy, Greece, and England, flowering in the fpring. In the laft-men- tioned country it is hardly known any where but in the limeftone part of Oxfordfliire, about Witney and Burford. We have gathered it at Caferta, near Naples. The root is fibrous and annual. Stem branched from the bottom, ex- cept on poor ground, ufually from four to fix inches high, round, fmooth, leafy. Leaves glaucous, fmooth, various in fize, entire, or now and then {lightly toothed ; the radical ones ftalked, ovate, obtufe ; the reft feffile, alternate. Flowers white, fmall, with narrow, ereft petals. Style fo fhort as to be fcarcely difcernible between the rounded lobes of the pouch. Seeds three or four, at leaft, in each cell. The fmall annual root, ufually branched Jlem, and minute _^y.-, are quite fufficient to diftiuguifh this fpecies from the laft, with which it has been confounded ; nor is it difficult, with a moderate degree of obfervation, to avoid the error of thofe old botanifts, who defcribed its ftarved and luxuriant ftates for diftinft fpecies. Ray fufpedled this, and has adverted to it in his own fecond edition of the Synopjts, by far the moft exaft, p. 176. 10. Th, luteum. Yellow Sicilian Shepherd's Purfe. Bi- von. Cent. i. 78. (" Th. montanum, glafti foho, parvum, perfoliatum, norinjhil ferratum, filicula cordata ; Cupan. Panphyt. v. 2. t. 256. Th. montanum luteum, glafti folio, parvum, perfohatum, nonnihil ferratum, filicula cordiformi ; Cupan. Hort. Cathol. 212.")— Pouch inverfely heart- /haped, nearly orbicular. Leaves toothed, the lowf-rmoft ftalked ; the reft clafping the Item. Style almoft equal to the lobes of the feed-veffel — Native of dry mountainous places near Palermo, flowering in April and May, and fent US by the baron Bivona. This is a fmall, fmooth, glaucous, T H L annual plant, from one to three inches high. Stem erect, either Ample, or branched from the bafe. Leaves half an inch, more or lefs, in lengtii ; the lo-^er ones fpatulate ; the others ovatc-oblong, bluntifti, with a hcart-ftiapcd bafe ; all having one or two large teeth at each fide. Floivers re- markable for being yellow. They are fmall, not many together, in ftiort terminal corymbs, becoming elongated clujlers of rather large, rounded, reticulated pouches, with a few feeels in each cell. The petals are emarginate, eredt, longer than the calyx. Stigma 'urge, on a level with the lobes of the pouch. 11. Th. Burja Pajloris. Common Shepherd's Purfe. Linn. Sp. PI. 903. Willd. n. 13. Fl. E.it. n. 6. Prodr. Fl. Grsc. n. 1499. Engl. Bot. t. 1485. Curt. Lond. fafc. I. t. 50. (Burfa Paftoris ; Ger. Em. 276. Mattlu Valgr. V. I. 521.) — Hairy. Pouch inverfely heart-fliaped, foniewhat triangular, fcarcely bordered. Radical leaves pinnatifid. — A very common weed i'» cultivated and wafte ground, tliroughout Europe, as -veil as in Nortli America, and in moft countries where European m^rchasidife or cul- tivation has reached. We have alrL>ady mentioned that this fpecies is indubitably the 6?.acrr> of Diufcorides. It flowers at all times, from the beginning of fpring to the end of autumn. The white tapering annual root is diftinguiftied by a very peculiar naufeous fmoke-like icent, when pulled out of the ground. Whole herb rough with ftarry as well as prominent hairs. Stem various in height, ereft, round, with alternate fpreading branches, though fometimes fo ftarved as to be quite fimple and flender, with all the leaves of the plant undivided ; in which ftate the fpecies is difficult to be recognized. The radical leaves are numerous, clofe to the ground, varioufly pinnatifid, moftly toothed, fome- what lyrate, about two or three inches long ; the reft: linear -oblong, acute, feffile, entire or toothed, embracing the ftem with their elongated heart-ftiaped bafe. Flowers fmall, white, in denfe corymbs, often tinged with purplifh-brown. Pouches fmooth, fatchel-ftiaped, whence the modern name, difpofed in very long, lax, upright clujlers. Style rather prominent. Seeds numerous, fmall, oval, a favourite food of fmall birds, as well as the flower-buds. The flavour of both is warm and pungent. 1 2. Th. ceratocarpon. Horned Shepherd's Purfe. Mur- ray in Comm. Goett. v. 5. 21. t. i. Linn. Suppl. 295. Willd. n. 14. Ait. n. 3. Scop. Infub. v. I. 10. t. 4.) — Very fmooth. Pouch obovate, tumid, with a terminal, double horn-like, comprefled border. Leaves lanceolate, fomewhat toothed ; arrow-ftiaped at the bafe -Native of Siberia, from whence Pallas brought the feeds. The root is annual, tapering. Stem folitary, ereft, twelve or eighteen inches high, leafy, moftly quite fimple. Leaves all fmooth, flightly toothed, or wavy ; the radical ones obovate, on long ftalks ; the reft feffile. Floivers numerous, white, very fmall. Pouches compofing a long clujler, very confpicuous for their two (harp prominent horns, between which ftands the very ^ortjlyle. Seeds large, about two in each cell. THLASPIDIUM, 9^xc77^.J.ol. of Cratevas, according to Tragus ; a name whofe etymology has been millaken, like TiiLASPl, (fee that article,) from whence it is manifeftly derived. Tournefort, who in his Lijlitutwnes 214, adopts this name, for vi'hat Lmnasus more aptly termed Bijcutella, explains it as meaning that the plants which bore it were allied to Thlajp'i ; and this, no doubt, is correft. But Ambrofini, who confiders Thiajpi itfelf as applying to the beaten or flattened form of the feed-velfel, deduces the pre- fent word from ^\x.jj, to bruije or beat, and ao-irioiov, a little faield, which is evidently applicable to the flat (hield-hke fruit of Thlafpi arvenje, and is fo plaufible an explanation, that T H O T H O that it Ceems to have chiefly led the modern expounders of uuciept writers to take this fpecies for Cxxt^ti of Diofcorides. We have ab-eady, in its proper place, (hewn our Shepherd's Purfe to be what he defcribes ; and we can iinderftaiid the name, as derived from i\aw, in no other light, than alluding to the minute feeds, which feem as if beaten to powder. This is by no means the iirft inllance, in which the moll apparently jufl; etymology, proves not to be the real one. THLIBI.^, in Antiquity, a kind of eunuchs. See TuLASiAS and Castration. THLIPSIS, SxiTTo-ir, is ufed, by anatomifts, for the compreffion of any veflel or aperture, by which its cavity is leflened. THNETOPSYCHITES, compofed of 9»*.-, mortal, and X-xix'^, foul, in Ecdeftajlical Hijiory ; a fedl in the ancier.t church, who believed the foul of man perfeftly like that of brutes ; and taught that it died with the body. See Soul. We meet with no account of thefe heretics any where but in J. Damafcenus Hscref. 90, unlefs they be the fame with thofe Eufebius fpeaks of. Hilt. Eccief. lib. ix. c. 38, who relates, that in Origen's time, there were heretics in Arabia, who taught, that the foul of man died with the body ; but that it (hould rife again with it at the end of the world. Ke adds, that Origen refuted them in a numerous council, and reclaimed them from their errors. St. Auguftine and Ifidore call thera the Arabian heretics. Marfliall, in his tables, ufes the word Thenopfychites inftead of Thnctopfychites . THOA, in Botany, a Guiana name adopted by Aublet, and retained by Juffieu, and even Schreber ; iee our article Gnetum, to which genus this plant is there, for the firfl time, referred, as a fecond fpecies. THOALABIAN, in Geography, a town of Arabia, in the province of Nedsjed ; 260 miles E.N.E. of Hajar. THOANHOA, a town of Cochinchina, at the bottom of a large bay. N. lat. 16^45'. E. long. 106° 27'. THOARD, a town of France, in the department of the Lower Alps ; 9 miles E.S.E. of Sifleron. THOCO, an ifland in the Grecian Archipelago, near the coaft of Greece, about eight miles in circumference. N. lat. 37° 20'. E. long. 23° 2!'. THOCOS, 9i.)xo-, in Antiquity, the izme\\\\h.Thacas. THOGRAI, in Biography, a Perfian of Ifpahan, who was grand vizier to the fultan Mahch Mailiud, is celebrated for his poetical talents, a fpecimen of which is given by Pococke ; and for a commentary upon the republic of Plato, to whom the Saracens paid little attention. After a ftrange reverfe of fortune, Thograi was put to death by order of the fultan in the year ] I2I. THOIRY, in Geography, a town of France, in the de- partment of the Ain ; 6 miles S.S.W. of Gex. THOKES, in our Old Writers, fifn with broken beUies, forbid by ftatute to be mixed or packed with tale-fifh. 22 Ed. IV. cap. 2. THOLEN, in Geography. See Tolen. THOLES, in Sea Language, denote fmall pins driven perpendiculai'ly into the upper edge of a boat. In rowing, the oar paffes between the two tholes, in the fpace called the row-lock. Sometimes there is only one pin to each oar, as in the boats navigated on the Mediterranean fea : in that cafe the oar is hung upon the pin by means of a ftrop. THOM/EANS, Thomeans, Thomites, or Chrijlians of St. Thomas, a people of the Eaft Indies, in Cochin, and upon the coaft of Malabar and Coromandel, who, according to tradition, received the Gofpel from the apoftle St. Thomas. It appears by the tcftimony of Cofmas, who wrote about Vol. XXXV. A.D. 547, and whofc work is tranflated by F. Montfaucon, that Chrilliajiity was eftablifhed in India in the fixth cen- tury. We alfo find in the fubfcriptions of the council of Nice, that of a prelate, who calls himfelf bifliop of Perfia. Moreover, an ancient author, cited by Suidas, fays, that the inhabitants of Interior India, (a name which Cofmas gives to thecoall of Malabar,) the Iberians and Armenians, were baptized under the reign of Conftantine. The princes of the country, and particularly Serant Pe- roumal, emperor of Malabar, the founder of the city of Calicut, A.D. 825, granted extraordinary privileges to thefe Chriftians. When Vafco de Gama, the Portuguefe admiral, arrived at Cochin with a fleet, in the year 1502, thefe Chriftians fent deputies to him, imploring his protcftion, and that of the king his niafter. The admiral treated them kindly, but was in no condition to afford them any effeftual affiilance, in relieving them from the yoke of the Pagan kings, to which they were then fubjeft. The language they ufe infacris, is the Syriac, or, as fome fay, the Chaldee ; but their ordinary- language is the fame with that of their neighbours. The firft miffionaries, who attempted to profelyte them to the church of Rome, were Cordeliers, but their endeavours proved inefFeftual. The diftinguifhing opinions and reli- gious rites of thefe Chriftians are as follow. They are charged with an invincible attachment to the do'n.atafte for poetry, which he betimes indulged, and which introduced him, during his vacations, to the fociety of fome neighbouring gentlemen. Of his produdions, how- ever, he thought fo humbly, that on New-yeai's day he ';°^°""<'d to the flames thofe of each preceding year. From Jedburgh he was removrd to the univerfity of Edinburgh, where he perfevcred in the cultivation and exercife of his poetical talents ; but upon the death of his father, he com- plied with the wifhes of his friends by entering on a courfe 01 divinity. His probationary exercife was the explanation T H O of a pfalm, which was written in a ftyle fo fplendid, as to incur reproof from the theological profefFor, as being alto- gether unfuitable to the audience w hich might probably attend his future minillry. Having no great inclination for the office, tliis admonition induced him to devote himfelf en- tirely to poetry : and after fpending fome time as private tutor 111 the family of lord Binning, he determined, at the fuggeftion of a lady, who was his mother's friend, to try his fortune in London. In 1725 he came to London, and meeting with his college acquaintance Mallet, he fhewed him his poem of " Winter," in an impcrfe£l ftate ; who advifcd him to finifti and publifh it. Mr. Millai-, a well-known London bookfeller, bought it for a fmall fum, and pub- liihed it in 1726. At firft it attracted little attention ; but Mr. Whateley, a gentleman of acknowledged tafte, giving a favourable account of it, brought the poem and its author into notice. The author was introduced to Pope, and re- commended by bifhop Rundle to lord chancellor Talbot. In 1727 he pubhfhedhis " Summer," and in the fame year " A Poem facred to the Memory of Sir Ifaac Newton," juft deceafed, and alfo his " Britannia." His " Spring" was publiflied in 1728 ; and in 1730 the Seafons were completed by " Autumn," and publiflied collectively. In 1728 Thom- fon, aipiring to the popularity and emolument of dramatic compofition, fucceedcd in introducing upon the ftage of Drury-lane his tragedy of " Sophonifba." Its reception, however, was not very flattering. Soon after he was ap- pointed, by the recommendation of Dr. Rundle, travelling companion to the Hon. Mr. Talbot, the eldeft fon of the chancellor, and had an opportunity of vifiting moft of the courts and countries of the European continent. During this tour, the idea of his poem on " Liberty" was fuggefted to him, and he employed two years in completing it. In confequence of this excurfion, he obtained, by the intereft of Mr. Talbot, the place of fecretaiy of the briefs, which, being almoft a finecure, afforded him leifure for his private literary purfuits. His poem on " Liberty" was more coolly received than the natui-e of the fubjeft led him to expeft. When lord Hardwick fucceeded the lord chancellor Talbot, Thomfon loft his place ; but upon being queftioned by the prince of W.-Jes, to whom he was introduced, by Mr. (after- wards lord ) Lyttelton, as to his circumftances, a penfion of 100/. a year was granted to him. Upon the introduftion of his fecond tragedy, " Agamem- non," to Drury-lane, in 1738, he was fo anxious concerning its fuccefs, that he is faid to have been thrown into a copious perfpiration. His " Edward and Elconora" was prevented from appearing by the interference of the lord chamberlain. The " Mafque of Alfred," performed before the prince at Chefden-houfe, in 1 740, was the joint produftion of himfelf and Mallet ; and in this piece was introduced the famous fong of " Rule Britannia," the produftion of one or other of thefe two perfons. The moft fuccefsful of Thomfon's dramatic pieces was his "Tancred aad Sigifmunda," which appeared at Drury-lane in 1 745 ; but hia " crowning perform- ance," as one of his biographers calls it, was " The Caftle of Indolence," publifhed in 1746. Our poet was now ren- dered independent by the intereft of Mr. Lyttelton, who obtained for him the ofpice of fmveyor-general of the Lee- ward iflands, which, after payment of a deputy, yielded him about 300/. a year. Death, however, in confequence of a fever occafioned by a cold, deprived him, in Augufl 1748, of the comparative affluence derived from this ap- pointment. His remains were interred in Richmond church, without any memorial ; but in 1762 amonument was ereSed in Weftminfter Abbey, the expence of which was defrayed out of the profits of an edition of his works, publifhed by Mr T H O T H O Mr. Millar. His " Coriolanus" was brought on tlie ftage by his executors, in 1 749, for the benefit of the furviving branches of his family. The prologue, compofed by Lyt- teltoii, was very feelingly dehvered by Quin, the intimate friend of Thomfon. Thonifon's pcrfon was large and awkward, and his coun- tenance luianiinated ; nor did iiis appearance or manners indi- cate genius or refinement. With feleft friends, however, he was eafy and cheerful, and univcrfally beloved for the kindnefs of his heart, and freedom from thofe paffions that fometimes difgrace men of literary charaAer. He was in- dolent and ft-lf-indulgent in his habits; although " no poet," as his biographer fays, " has deferred more praife for tiie moral tenor of his writings. Unbounded philanthropy, en- larged ideas of the dignity of man, and of his riglits, love of virtue, public and private, and a devotional fpirit, nar- rowed by no view5^ of feft or party, give foul to his verle when not merely defcrlptive ; but no one can rife from the perufal of his pages without mehoration of his principles or feelings." His poetical merit is moil confpicuous in his " Seafons," and though Dr. Johnfon charges it with adefetl of method, yet as a hiftory of the year through its changes, depending upon the vicilFitude of the feafons, it adheres fufficicntly to its general plan for preferring a continuity of fubjeft, with due allowances for the moral and philofophical digreflions by which it is vai-ied. Its diftion, though fome- ivhat laboured, is energetic and expreflive. Its verfification, though it does not indicate a nice ear, is feldom unpleafantly harfii. Upon the whole, continues the biographer now cited, "fcarcely any poem has been more, andmore defervedly, popular ; and it has exerted a powerful influence upon pviblic talle, not only in this country, but throughout Europe. Thonifon's other pieces in blank verfe difplay a vivid imagina- tion, a comprehenfive underftanding, and exalted fentiments, but are not marked with any peculiar character. The addi- tion to his fame as a poet has principally arifen from his " Caftle of Indolence," an allegorical compofitiou in the manner of Spenfer." Of his tragedies, the beft that can be faid is that they maintain a reipeftable rank among the produftions of the modern fchool of the drama, which, when they difappear from the ftage, are feldom taken up in the clofet. Murdoch's Life of Thomfon. Johnfon's Lives of the Poets. Gen. Biog. THONE, in Geography. See Tone. Thone, in Agncuhiire, a term fignifying fomewhat damp -and cold, not thoroughly dry. Alfo flaxid or limber, as undried hav, corn, or llraw in a moift ftate. THONGTONG, in Geography, a town of the Birraan empire ; 10 miles N.W. of Raynangong. THONNA, a town of Saxony, in the principality of Gotha ; I 2 miles from Gotha. THONNAUSTAUFF, a town of Bavaria, near the Danube ; 3 miles from Ratifbon. THONNES, or Thonnex, a town of France, in the department of the Leman ; 9 miles S.E. of Annecy. THONON, or ToN'os", a town of France, in the depart- ment of the Leman, late capital of the duchy of Chablais, on the lake of Geneva, fituated on a plain a little elevated. It is not environed with walls, but was formerly defended by a ftrong caftle, furrounded with lofty towers, where Amadeus VIII. and IX. and Louis, dukes of Savoy, re- lided for fome time. The caftle was burned and demolifhed, in the i6th century, by the Bernois. It has one parifh church and fcvcral convents ; i8 miles N.E. of Geneva. N. lat. 46' 18'. E. long. 6= 32'. THOPH. See Machul and Sistrum. THOPHAIL, Abu Giaiar, in Biography, a cele- brated Peripatetic philofophcr and phyfician, was a aativc of Seville in Spain, and preceptor to Maimonides and Avcr- roes. This philofoplier employed the Ariftotelian doftriue to the purpofes of enthufiafm, in the elegant tale ftill extant of " Hai Ebr Yockdan ;" a youth who, havuig been ex- pofed when an infant on the fea-coaft, was nouridied by a hind, and grew up in the woods, without any intcrcourfe with human beings ; and who, by the unaided exertions of his own powers, attained to the knowledge of things na- tural and fupernatural, and arrived at the felicity of an in- tuitive intercourfe with the divine mind. This piece is written with fnch elegance of language and vigour of imagi- nation, that, nolwithftanding the improbability of the ftory, it has been univcrfally admired. It exhibits a favourable fpe- cimen of Peripatetic phllofophy, as it was taught among the Saracens ; and, at the fame time, affords a memorable ex- ample of the unnatural alliance, which was now fo generally ellabliflied between philofophy and fanaticifm. This work was tranflated by Edward Pococke, jun. from the Arabic into Latin, under the title of " Philofophus Autodidaftus," and printed in 4to. at Oxford, in 1 700. It was alfo tranflated into Englifli by S. Hoadley, profeffor of Arabic in Cam- bridge, ed. Lond. 171 1, 8vo., and alfo into Dutch. Tho- phail is faid to have written feveral other works, and died at Seville in 1175. Bruckcr by Enfield. Gen. Biog. THOR, in Mythology, a deity worfliipped by the ancient inhabitants of the northern nations ; p;irticularly by the ancient Scandinavians and Celts. JuHus Cxfar (Com. lib. vi. c. 17.) fpeaks of a god of the Gauls, who was charged with the conduft of the atmofphere, and prefided over the winds and tempefts, under the name of Jupiter : but Lucan gives him a name, which bears a greater refem- blance to that of Thor, w'z. Taranis, a word which, to this day, in the Welfh language, fignifies thunder. The autho- rity of this deity extended over the winds and feafons, and particularly over thunder and lightning. In the fyftem of the primitive religion, the god Thor was probably one of thofe genii, or fubaltern deities, fprung from the union of Odin, or the Supreme Being, and the Earth. The Edda calls him the moft valiant of the fons of Odin ; and in the Icelandic mythology, he is confidered as the defender and avenger of the gods. He always carried a mace, or club, which as often as he difcharged it returned to his hand of itfelf ; he grafped it with gauntlets of iron, and was potFeffed of a girdle which had the virtue to renew his ftrength as often as was needful. With thefe formidable arms he overthrew the raonflers and giants, when the gods fent him to oppofe their enemies. Thor, Friga, or Freya, and Odin, compofed the court or fupreme council of the gods, and were the principal objefts of the worfliip and veneration of all the Scandinavians. The Danes feem to have paid the higheft honour to Odin. The inhabitants of Norway and Iceland appear to have been under the imme- diate proteftion of Thor : and the Swedes chofe for their tutelar deity Freya, or Frey, an inferior divinity, who, ac- cording to the Edda, prefided over the feafons of the year, and beftowed peace, fertility, and riches. There was a day confecrated to Thor, which ftill retains his name in the Danifh, Swedifh, Englifh, and Low Dutch languages, -ulz. Thurfday. This word has been rendered into Latin by dies Jovis, or Jupiter's day ; for this deity, according to the ideas of the Romans, was the god of thunder. Mallet's North. Ant. vol. i. p. 95. Thor, Le, in Geography, a town of France, in the depart- ment of the Mouths of the Rhone ; 9 miles E. of Avignon. THORA, a town of Hindooftan, in the circar of Ran- tampour ; 45 miles S. of Rantampour. Thoka, T H O TiioRA, in Botany. See Aconitum. 'I'HOR ACIC, in Anatomy, an epithet applied to various parts ill an.i about the ch..-ft, as to the aorta above the dia, plu-agra, and to fomc branches of the axillary artery ^lee Akteky): to fomc branches of the axillary plexus ot mrves (fee Nerve) ; to the trunk of the abforbing fyftcm of veflcls. Sec Absorbents. THORACICI, in the Linnaan Syftem of Ichthyology, the name of the third order of bony fifhcs, rcfpiring by means of gills only : the charader of which is, that the bronchia are ofliculated, and the ventral fins are placed underneath the thorax. This order in Gmelin's edition of the Linnxan fyftem, includes nineteen genera, and a good number of fpecies. The genera are, the cepola, echends, coryphana, gobius, cottus, fcorpana, %eut, pleuroneHes, chstodon, fparus, fcarus, labrus, Jc'itna, perca, gafterojleus, fcomber, centrogajler, muHus, and trigla. THORiii Radix, in the Materia Medica, the name of a root which keeps its place in the catalogues of officinal fimples, but is feldom ufed. See Aconitum and An- THORA. The plant which produces it is the thora valdcnfis of Gerarde. It is kept in the gardens of the curious, but jrrows wild in the mountainous parts of Germany. The root is compofcd of a number of granules or fmall lumps, hke that of the common ranunculus ; the leaves are roimdifh, and ftand on fmall pedicles, and the ftalks are about fix inches high, and the flowers yellow, and like thofe of our common wild ranunculufes. The root is acrid and corrofive, and the juice of the leaves is faid to poifon animals, and to have been ufed by the ancients for that purpofe. THORAME, in Geography, a town of France, in the department of the Lower Alps; 13 miles E. of Digne. THORAX, in Anatomy, that divifion of the Ikeleton which contains the bones forming the cavity of the cheft ; or it is ufed to denote the cavity of the cheft. See Lung, where the bones and their articulations are defcribed, as well as the cavity they form, and its coatents. Thorax. For an account of the operation of tapping, refer, to Empyema, Paracentesis, and Wouni>s of the Thorax. The fubjeft of wounds of the cheft will be found in the article Wounds. THORDO, DiACONUS or LegifeR, in Biography, de- fcended from an ancient family, was provincial judge in North Jutland, and flourifhed in the timeof WaldemarIII.,or about the year 1350. He was the author of the following work ; " Conftitutio Voldemari Regis, per Thordonem Legiferum, &c." Ripis, 1504,61 Havn. 1508, 4to.;tranflated into Latin together with Waldemar's Jutland Laws, and afterwards pub- li(hed in Ludewig's " Rehquise MSS." torn. xii. and alfo in German by Eric Krabbe, in " Weftphal's Monuments." Gen. Biog. THORDSEN, or Theodori Sturla, called alfo Frode or Polyhljlor, was born in Iceland, about the beginning of the 13th century. His father was Thordur Sturlefon, bro- ther to the celebrated Snorro. (See Sturleson.) He is reprefentcd to be one of the greateft Icelandic poets of his time, as well as an eminent lawyer and hiftorian. His talents excited enemies, fo that he wa3 forcibly carried away from the ifland in 1263, and conveyed to Norway, where he was favourably received by the king Magnus Lagebseter, ad- mitted into liis council, and appointed his hiftorian and da- pifer, one of the higheft offices at the Norwegian court. Afterwards, however, he returned to Iceland, and having been chief juftice of the country for many years, died' in T H O 1 284. Hie works are " Landnama Saga," or " Liber Ori- ginum Iflandiae," publi(h(;d entire by bilhop Thordur Thor- fakfen, Skalholt, 1688, 4to., and by J. Finnzus, Havn. 1774, 4to.: — A continuation of " Sturlimga Saga," orthe hiftory of the Sturla family, and alraoft the whole of Ice- land, during his time, which was begun by the learned bifliop Brand : — " The Hiftory of King Haager Haagen- fen," publilhed at the expence of the crown-prince Frede- ric : — " The Hiftory of King Magnus Lagebseter," com- piled from the public records of the kingdom, the greater part of which has been loft. Gen. Biog. THORESBY, Ralph, an eminent antiquary, the fon of a coniiderable merchant of an ancient family at Leeds, where he was born in the year 1658. His father belonged to the body of Prefbyterians, and being addifted to anti- quarian ftudics, founded tlie collcftion entitled " Mufeum Thorclbianum." The fubjeft of this article was intended for a mercantile profeffion, and in order to complete his edu- cation, begun at Leeds, and profecuted in London, he was fent, in his twentieth year, to Rotterdam, to acquire the Dutch and French languages. But his father dying in 1679, he fucceeded him in bufinefs, married, and fettled in his na- tive town. To antiquarian refearches, for which his father's example had given him an early tafte, he devoted much time and attention. In the earlier period of his life he had been an occafional conformift, in common with many of thofe who were called Diftenters, and difgufted by the indifcreet zeal of his paftor in maturer life, as well as probably influenced by his diocefan, archbiftiop Sharp, he joined in full commu- nion with the eftablifhed church. His conneftion and cor- refpondence with perfons engaged in fimilar purfuits with his own were gradually enlarged : and upon communicating, by Dr. Mai-tin Lifter, an account of feme Roman antiqui- ties difcovered in Yorkfhire, to the Royal Society, he was admitted a member of that learned body in 1697. In 17 14 he publifticd a work in which he had been long engaged, containing a hiftory of his native town, and entitled " Duca- tus Leodenfis ; or the Topography of Leedes, and Parts ad- jacent," together with a catalogue of the antiquities, &;c. contained in the Mufeum Thorelbianum. An hiftorical part, to which he often refers, and comprehending a view of the ftate of the northern diftrifts of this kingdom in remote ages, was left in MS. continued to the fixth century ; which MS. being communicated to the editors of the Biographia Britannica, was by them printed entire in the article " Tho- refijy." He publiftied alfo " Vicaria Leodenfis, or the Hiftory of the Church of Leedes," Lond. 1724, com- prehending obfervations on the origin of parochial churches, and the ancient manner of building them, together with biographical memoirs of feveral clergymen. In the follow- ing year he was feized with a paralytic affeftion, which ter- minated his life at the age of fixty-eight years. Poffeffing an extenfive acquaintance with the hiftory of his country, genealogy and heraldry, and ancient coins and medals, he always manifefted a diipofition to affift thofe who were en- gaged in works of the antiquarian and biographical defcrip- tion. The fentiments of Mr. Thoreftjy were liberal and CathoUc ; his manners regular, and his difcharge of focial and religious duties exemplary. Biog. Brit. THORIGNY, in Geography, a town of France, in the department of the Channel; 6 miles S.S.E. of St. Lo. — Alfo, a town of France, in the department of the Yonne ; 18 miles S.S.E. of Provins. THORLASKEN Gudbrand, in Biography, an Ice- landic writer and prelate, was born at Stadarbakke, in the diftrift of Holum, in 1542. In 1561 he was fent to the univerfity of Copenhagen ; in 1564 he became reftor of the fchool T H O T II O fcliool of Holum ; and in 1570 he was appointed bifliop'of that diocefe. With a view of diffufing knowledge, he efta- bhflied a printing-prefs, firft at Riipurel, and afterwards at liolum, which he perfonally fuperintended. He was one of the moll learned of the Icelandic hifhops, but too arbitrary in the cxercifc of his cpifcopal funftions. He died in 1629, in the 851!! year of his age. Many coniiderable works, partly his own, and partly thofe of otliers, iflned from his prefs. He alio conftrufted a map of Iceland, which was engraved by Orteliiis. Gen. Biog. THORN, in Geography, a city of PrulTia, lituated on the Viftula, formerly the cliicf city of Polilh Pruflia. It was founded by Herman Baick, firft grand-mafterof the Teutonic order, who built the callle of Thorn in 1 23 1. In the follow- ing year, the foundation of the town was laid ; but the build- ing was difcontinued in 1235, on account of the inconvenient fituation, and Thorn was built about a German mile farther up the river, on the fpot where it now Hands. It is fup- pofed to have been called Tlvorn, becaufe the knights of the Teutonic order, by building this city, opened themfelves a thor or door into Pruflia. When the knights of the Teutonic order enormoufly abufed their power throughout all Pruflia, Thorn was the firll city which formed the noble fcheme of fliaking off their oppreflive yoke. The inhabit- ants then put themfelves under the proteftion of Cafimir the Great, king of Poland, upon advantageous conditions, as a free city. Thorn has ten gates, and is divided into the Old and the New Town, each of which had formerly its re- fpeftive council, magiftracy, and police. But, in 1454, they were incorporated into one city. They are, however, feparated from each other by a wall and moat within the town ; and without, they are defended in common by a fine double wall and moats. Thorn was formerly ftrongly for- tified; and it gradually improved its advantageous fituation, lb as to become a place of very confiderable trade, and one of the principal of the Hanfe towns. It likewife carried on an extenfive commerce in the Baltic, independently of the other cities of that confederacy ; for before the river widened lo much, and confequently became Ihallower, fhips of burden could come up to the very city. From various caufes, in little more than half a century, Thorn greatly declined from its flouriihing cowdition ; for it furrendered by capitulation, in 1655, to Charles Guftavus, king of Sweden ; and, in 1658, after a vigorous fiege, it was taken by the Poles and Brandenburghers. In 1703, it was bom- barded and taken by Charles XII. king of Sweden, who not only exhaufted it by the heavieft contribution, but alfo demolilhed all the fortifications, contrary to the articles of capitulation. Between the years 1708 and 1 7 10, great numbers of its inhabitants were fwept away by the plague. In the following years, the revenues of the city fuffered con- fiderably by the confederations in Poland, and no lefs by the commotions occafioned by the competitors for the crown of that kingdom. In 1793, fo"ie Prufiian troops entered this town, and from that time it has formed part of the dominions of that king ; the king of Pruflia taking poflef- fion of Thorn and Dantzic, together with the palatinates of Pofnania, Kaiifh, &c. agreeably to a proclamation, pub- Llhed on the 25th of March. The foap, ginger -bread, &c. of Thorn, are every where in great requeft ; and, accord- ingly, great quantities of them are exported. The afpa- ragus that grows wild on fome of the city lands, is not inferior to that which is cultivated with fo much care in other countries; 70 miles S. of Dantzic. N. lat. 52° 55'. E. long. iS'^ 30'. Thorn, or Thoren, a tovyn of France, in the department iff the Lower Meufe. It had a noble abbey, whofc fuperior Vol, XXXV. was a princcfs. This abbey was alfefled in the matricula at one horfc or twelve florins ; 7 miles S.W. of Rurcmond. Thorn, in Botany, a name generally given to ail trees, or the larger kinds of fhrubs, which are armed with fpines or prickles, but more particularly applied to the Linnsan genus Ckat.'EGU.s, now funk in Mks.''1Lus. (See thofe articles. ) Otherwife this name is almoft as vaguely applied as its Greek and Latin fynonyms, axKvjy. and fpina, neither of which is ftnftly appropriated to any one plant, or family of plants. Av.KvOa, in Diofcorides, is the name of tiiat well- known herb, whofe leaves compofe the ornamental part of a Corinthian capital, and which is the Brank-urfine, or Acan- thus of modern botanifts, as well as of the generality of writers. But he applies the fame likewife to a kind of thilUe. The Acanthus of Virgil can fcarcely be any thing elfe than the Common Holly, Ilex Aquifolium, though we do not find that this idea has occurred to his critics or iiiuftrators. This flirub, fo abundant in Italy, cannot be traced, under any other name or allufion, in the poet ; while the brigiit afpeft, the faffron or fcarlet colour, the pliant twigs of his Acanthus ; but, above all, its being evergreen and bearing berries, Georg. 2. 119, and fubjefted in winter to the fliearsof the gardener, ibid. 4. 137, are circumftances ftrikingly appropriate to the Holly, not to the Bqank- urfine ; though the name may allude to the prickly foliage of either. TnoKs-AppU. See Datura, and Datura Stramonium. TliOKN, Black, or Sloe-tree, a fpecies of the ^runuj-, called prunus fylvejlris. See Prunus and Slok. Thorn, Box. See Lycium. Thorn, Buck. See Rhamnus, and Rhawnus Cu- tharticus. Thorn, Chri/l's. See Paliurus and Rhamnus. Thorn, Cock/pur. See CRAxyEcus, Mespilus, and Pyrus. Thorn, Egyptian, a name fometimes applied to a plant which is armed with llrong thorns or prickles, and which is faid to have been lately found to make a good hedge- plant when kept low by being well cut in. It is alfo a very ornamental ftirubby tree-plant for pleafure-grounds. See Acacia. ThOrn, Evergreen. See Mespilus and Pyrus. Thorn, Glajlonbury, a variety of the hawthorn. See Crat^gus and Mespilus. Thorn, Goat's, a fpecies of AJlragalus ; which fee. See alfo Tragacantha. Thorn, Nam. The fruit of this thorn has been found ufeful by farmers in feeding team and other horfes. See Crataegus and Mespilus. Thorn, Lily. See Catesb^a. Thork, Purging. See Rhamnus. Thorn, Scorpion's, a fpecies of Ulex ; which fee. THORif» Spanijh Hedge-hog, a fpecies of Antbyllis ; which fee. TllORN, White, a fpecies of Crataegus ; which fee. See alfo Mespilus. Thorn, in Vegetable Phyfwlogy. See Spina and Fulcra. TuoRti-Hedges, in Agriculture, a term often applied to fuch as are made of that plant, whether of the white or blatk kind. They in moll cafes form the befi fences. See Fence, Quickset, Qvickszt -Hedge, &c, THORNBACK, in Ichthyology, the Enghfli name of a fpecies of ray-fi(h, the raia clavata of Linnxus, priekly on the back, and with tuberculofe teeth, and a tranfvcrfe carti- lage in the belly : the young filh have very few fpines on them, and their backs are often fpotted with white, and each fpot encircled with black. (See Raia.) This fpecies 4 B frequents T H O frri|.ieiil« our faiidy Ihores, is very voracious, and feeds on ill lorts of flat fifh, and is particularly fond of herrings and faad-eels, and fometimes cats crullaceous animals, lueli as crabs. The thornbacks begin to generate in June, and bring forth their young in July and Auguft, which (as well as ihofe of the (kate) before they are old enough to breed, are called maids. They begin to be in feafon in November, and continue fo later than fl5'BURGH, in Geography, a town of Virgmia ; 74 miles S. of Wafliington. THORNBURY, an ancient market-town in the lower divifion of the hundred of the fame name, in the county of Gloucefler, England ; is fituated 24 miles S.W. from the city of Glouceller, and 122 miles W. by N. from London. The town confifts principally of three itreets, in the form of the Roman Y, "having firil," fays Leland, "one longe llrete, and two horncs goyne owt of it." The corporation is compofed of a mayor, twelve aldermen, and a town-clerk ; but the power of thefe officers is become much limited by difufe. A weekly market is held on Saturdays, but is not much frequented : here are three annual fairs. The church is fpacious and handfomc : the tower is lofty, and orna- mented with rich open-worked battlements, and eight pin- nacles. The population, as returned under the aft of the year 181 1, amounted to 1083 ; the number of houfes to 2 16. At the north end of the town are the remains of an unfinilhed callle, which was commenced by Edward Stafford, duke of Buckingham, but (lopped when he was beheaded in 1522. This caftle may be confidered as particularly de- ferring notice, from its affording fome interefting fperimens of the laft gradation of caftellated architefture. The former fplendour of Richmond and Nonfuch, which were con- temporary with it, are known only by defcription and en- granngs ; and Hampton Court, though it rofe under the hands of Wolfey at the fame period, is certainly lefs rich in the minute and capricious ornaments peculiar to the build- ings of Henry VII. and his fucceffor. A fniall part raoft relembling Thornbury, is feen at Windfor Caftle, in an ad- dition made by the firft-mentioned fovereign. It is evident, from a furvey made in the year 1582, that the whole fouthem fide was habitable, and that it confifted of feveral chambers, of magnificent dimenfions. The tower, the walls of which are perfeft, was divided into four rooms, the duke's own apartments : this ftands at the fouth-weft angle of the caftle. The duke was meditating the completion of the quadrangle which would have inclofed an area of two acres and a half, when his fatal attainder clofed his views for ever. Within the circuit walls twelve acres were inclofed : annexed to them are fmall rooms, intended as barracks for foldiers. In the reign of Elizabeth, the principal timbers were taken away ; and time has forwarded the dilapidation. A fingular coincidence has been remarked between the front of Thornbury caftle and that of Chriftchurch, Oxford ; and it appears as if the rivalry of tlie duke and cardinal Wolfey was exerted even in their ai-chitcfture Beauties of England and Wales, vol. v. Gloucefterfhire ; by J. Britton and E. W. Brayley. Lyfons's " Gloucefterftiire Anti- quities," foho. THORNE, a market-town in the lower divifion of the wapentake of Strafford and Tickhill, in the Weft Riding of the county of York, England ; is fituated near the fouth bank of the river Don, at the diftance of 10 miles N.E. from Doncafter, 29 miles S. by E. from York, and 167 N. by W. from London. The town appears to be in a progreflive ftate of improvement : it carries on a confider- able commerce by the Don ; and veffels trade regularly to 10 T H O London. Ships of a fize fufficiently large for the ooaiting trade, are biiilt at the fuburb called Hangman Hill, on the banks of the river, which is alfo the landing-place for all the merchandize. A canal cut from the Don to the Trent paffes within a furlong on the weft fide of the town. A weekly market is held on Wednefdays ; and two fairs an- nually, each of three days continuance, for horned cattle, woollen cloth, &c. According to the population returns of the year 181 1, Thorne contained 637 houies, the number of inhabitants being 2713. The country about Thorne is for the moft part fertile ; but low, flat, and totally un- pifturefque. On the eaft fide of the town is a field of rich fandy loam, and more elevated than the other lauds in the vicinity. Beyond this are vaft moors, which however are moftly drained and inclofed. At the diftance of about three miles weftward from Thorne, and on the Doncafter road, is Hatfield, a Iju-ge vil- lage, famous in the annals of hiftory for the battle fought there A.D. 633, by Edwin, the firft Chriftian king of Northunibria, againft Cadwallo, king of Wales, and Peiida, the Pagan king of Mercia. This conflift, which was ex- tremely fanguinary, terminated fatally for the Northum- brians : their monarch, and his eldeft fon Offrid, were flain, their kingdom fubdued, and their country laid wafte. This village was the birth-place of William de Hatfield, the fecond fon of king Edward III. The extenfive level of Hatfield Chace is faid to contain within its limits 180,000 acres, of which nearly one-half was formerly a great part of the year under water. It was fold by Charles I. to Cor- nelius Vermuiden, a naturalized Dutchman, without the confent of the commiffioners and tenants, to drain and cul- tivate ; which he effeftcd at the expence of about 4.00,000/., but the affair involved him in ruinous law-fuits. In the year 1811, an aft was obtained for inclofing between eight and nine thoufand acres of rich common in this neighbour- hood, which muft be ultimately produftive of great public and private advantage. — Beauties of England and Wales, vol. xvi. Yorkftiire ; byj. Bigland. Thorne, a fmall ifland of Denmark, in the Little Belt, near the ifland of Funen. N. lat. 59^ 15'. E. long. 9° 53'- THORNESS Bav, a bay on the N.W. coaft of the Ifle of Wight, between Newtown and Cowes. THORNE Y, a market-town in the north part of the hundred of Witchford, and county of Cambridge, England ; is fituated in the north-weft fide of the county bordering on Northamptonfiiire, 10 miles W. from March, 5 miles S.E. from Crowland, and 84 miles N. from London. It is fur- rounded by low and fertile grounds, which are now in a very complete ftate of drainage, the expence of which is defrayed by an annual tax of about a ftiilling per acre. Its ancient appellation was Ankeridge, which it obtained from the an- chorites who dwelt in a monaftery, or rather an aflemblage of hermitages, founded here about the year 662, by Saxul- phus, the firft abbot of Peterborough. The Danes de- ftroyed thefe hermitages in 870, and the place lay wafte till 972, when Ethelwold, bifhop of Winchefter, founded on the fcite an abbey for Benediftine monks, which became an opulent eftabliftiment, and ranked among the mitred abbeys. In the year 1085, the ancient church was taken down, and a new one commenced by the abbot Gunter, but it was not completed till 1128. This ftrufture poftefted confiderable magnificence, and was, according to Brown Willis, " at leaft five times as large as at prefent." When the abbey was diffolved by Henry VIII. great part of the church was deftroyed ; but the remainder efcaped by being made parochial. The weft front, which is the entrance to the church, T H O T H O cliurcli, is tlie mod perfeft part of the ancient builJiiig. The revenues of the abbey were ellimated, at the diflblu- tion, at 411/. I2J-. 11^. clear yearly value. Great part of its poflcfTions, with the fcite, was granted in 1549 to John, lord RufTell, anccftor to the duke of Bedford, who is lord of the manor, and owner, not only of the town, but alfo of 19,000 acresof the furrounding lands. This extenlive pi-o- perty is divided into farms from 25/. to 400/. per annum, generally in a very improved llate of cultivation. A market is held on Thurfdays, and two annual fairs were granted for Thorney to Francis, earl of Bedford, in the 1 3th year of Charles I. by the charter of incorporation for the govern- ment of the Bedford Level. The inhabitants of the pari(h, who are chiefly the defcendants of French Proteftants, are ftated in the population return of the year 1 8 1 1 , to amount to 1675 : the number of houfes being 251 Lyfons's Magna Britannia, vol. ii. part I. Cambridgelhire. Beauties of England and Wales, vol. ii. Cambridgelhire ; by .1. Britton and E. W. Brayley. Thornev IJland, a fmall ifland, in a bay of the Englifli Channel, near the coall of Suflex, about four miles in cir- cumference, with a village of the fame name, at the mouth of the Lavant ; 7 miles S.W. of Chichefter. THORNHILL, 5/V James, in Biography, may be called the father of hiftoric painting in England. He was the fon of a gentleman of an ancient family in Dorfetfliire, and was born at Weymouth in 1676. His family having fallen in fortune, he was obliged to refort to fome profeffion for fupport, and guided by an early tafte for painting, fixed upon that art as a bafe on which to raife a fortune and a name. He came to London, and was affifted by the celebrated phyfician Sydenham, who placed him under the tuition of an artift of little note, whofe name is not known, and to whom, from the ftate of the art at the time, he muft have been far lefs indebted for the progrefs he made, than to his own inge- nuity and induftry. After having praftifed for a while ■with fome celebrity, he travelled to Holland and to Flanders ; and thence vifited France, but did not proceed to Italy. Moft probably his objeft in this journey was only to acquire a knowledge of colouring ; and he might have fatisfied his mind on compofition and form, by having fpent three years in copying the cartoons of Raphael, which he was permitted to do by the favour of the earl of Halifax. Thefe copies are ia oil, and were bought after his death by the then duke of Bedford ; and by his grace's fucceflbr, the late duke, were prefented to the Royal Academy. They are wrought with care, but lack the delicacy of cha- racter and feehng obfervable in the originals. On his re- turn to England, his reputation was increafed, and honour and employment accompanied it. Queen Anne com- miffioned him to paint the interior of the cupola of St. Paul's, which he did in eight compartments. The fubjeft afiigned him was the hiftory of St. Paul ; and he treated it with confiderable grandeur of fl.yle,both as to compofition and execution ; but his defign wanted chaftity and fimplicity, and the heads of his figures have not fufficient refinement of expreffion. It was, however, the firft attempt by an Eng- lifhman of the kind, and fully juilified the preference given to him over La Guerre and t^a Foffe, who were then paint- ing the halls and ftaircafes of our nobility. He was after- wards employed to decorate an apartment at Hampton Court, with emblematlfcal allufions to the hiftory of the queen, and her union with her confort, George, prince of Denmark. But his grand work is the great hall at Green- wich Hofpital, where he has painted naval trophies and allegorical figures in great profufion ; and if much praife cannot be given to the purity of the defign, it ought not to be withheld from thi- brilliancy and vigour of the execu- tion. Altogether, it is a work unrivalled in its kind here, and well entitled him to the honour of knighthood, which George I. foon after conferred upon him. This was fome compenfation to him for the mortification of having liis demand for thefe paintings contefted, and being in the end paid only at the labourer's rate of fo much per fquare yard, (40J). He had the honour of fo far re-eftablifliing his family in- fluence as could be cffefted by being chofen to reprefent his native town in parliament ; but he did not enjoy his honours long, as he died at the early age of 57, leaving a fon, named alfo James, for whom he had procured the appointment of ferjcant-painter to the king, and a daughter married to Hogarth. THORNY Trefoil, in Botany. See Fagonia. Thorny Rejl-Harroiu, in Agriculture, a frequent weed in poor barren pailure land, which is not removed without difficulty, in confequence of its perennial nature. THOROE, in Geography, a fmall ifland of Denmark, in the Little Belt, near the ifland of Funen. N. lat. 55'-' i c'. E. long. 9° 53'. THOROLD, a townlhip of Upper Canada. THOROUGH, the common name of an inter-furrow between two ridges. They (hould always be clean and well-drawn. Tno'B.ovon-Bafe, or accompaniment to a continued bafe by figures. Thorough-bafe is but an aukward tranflation of the Italian terms bajfo cont'tnuo, by which accompaniment by figures, without any other guide for the right-hand on keyed inilru- ments, was at firft called. The French term accompagnement is the (horteft and moft comprehenfive title for the harmony expreffed by figures over the bafe ; if, as Rameau has done in his " Code de Mufique," we add " for the harpfichord or organ," as there are feveral other kinds of accompaniment befides _that on keyed-inftruments. Rameau defines accompaniment or thorough-bafe in the following manner. " Accompaniment on the harpfichord or organ, confifts in the execution of a complete and regu- lar harmony, by feeing only the notes of one part of that harmony ; and this part is called the bafe, being in reality the bafis or foimdation of the whole compofition. This bafe is played with the left-hand, and its harmony with the right." We (hall endeavour to affift our mufical reader, who has every thing to learn in the art of accompaniment, more by example than precept, and fhall give him a feries of pro- greffive leffbna in- the mufical plates, which will explain the whole myftery of mufical combinations from the com- mon chord, to the moft extraneous harmony. We take it for granted that he is perfeftly acquainted with the mufical fcale or gammut, in the bafe and treble clefs at leaft, as well as with the time-table ; and that the accidents of flat, (harp, and natural, are familiar to him. The firft thing, therefore, that we ftiall recommend to his ftudy, is a table of intervals, both in notes and figures. See Plate II. N° I. prefents a fcale in half notes, in which all the flats occur, from the unifon to the 9th ; another fcale expreffed by ftiarps. 2. Number of femitones above the bafe in each interval. 3. Common chords, major and minor, to all the twelve femitones, modulating by jths. 4. Modulation in common chords, major and minor alter- nately, the bafe falling a 3d at each chang*. And in 463 order T H O order to familiarize the lludent to thefe cliords in every part u( the inftrumcnt, he is advUoJ to make three voyages round the harmonical world : beginning with the 8th upper- moft, then the 5th, and iailly the 3d i and .t no millake 13 made, the laft chord in each of thefe circumnavigations will be an oclavc above the firft. But all difficulty in thefe exereifes will be removed, if it be remembered that, m going from chord to chord, only one note is to be changed by tile right-hand, which note is always the oftave of the new bafe. 5. Exercife of common chords in accompanying the hexachords in all the keys, major and minor, to their fun- damental bafes : in the praftice of which, dots are placed on the notes in the treble, which are to be played with the little finger. And though only the firft hexachord, or fix notes, is written backwards, each of them is intended to be played backwards as well as forwards. Many years ago, we tried to reduce all the rules of thorough-bafe to the compafs of a mejfage-card, and almoft all the combinations exprefTed by figures to common chords. And now, if the preceding exereifes of the hand in common chords have done their duty, the ftudcnt will perceive, from an enn-raving of the two fides of this thcrough-bafe card, that what has been explained in words and figures on one fide, is illullratcd witii notes on the other. The fecond card goes fomewhat deeper into harmonical myfteries, by what the French call la regie de I'oSave, or rule for accompanying with a fpccific chord every note of the key, afcending and defcending ; which, if pradlifed well in all the 24 keys, and impreffed on the memory, will enable the ftudent to figure a bafe himfelf, or to play with- out figures ; and by a lecming divination, without a treble part, to know the harmony that belongs to each bafe of a regular compofition, in a diatonic afcent and defcent. After thefe chords are literally at the pagers' -ends of the ftudent, the following eight rules and exceptions in playing without figures muft be obferved. 1. An accidental^ar/> note in the bafe is generally ac- companied with a °, and changes the key to the half note above fuch fharp. 2. An accidental ^at note in the bafe is generally ac- companied with a J, and changes the key to the 4th below fuch flat. 3. To the Jth of a key, if repeated at a clofe, two chords arc generally played in modern mufic ; the I and I : in old raufic, the J 7, and fometimes the 7th with the common chord. 4. When the bafe moves per faltum, a 3d, 4th, 5th, or 6th, common chords will do. 5. When the bafe rifes a 4th, and falls a 5th alternately, and the contrary, each note may be accompanied by a 7th. 6. In fyncopated or binding notes the " are played to the laft part of the ligature, by anticipation. 7. Slow notes in the bafe, in old mufic, are generally accompanied, as on the plate, by a * and I alternately. 8. Sufptnjwns of a whole ghord, or part of a chord, are cxpreffed by a dafti ( — ) preceding the refolution. The reverfc of the fecond card contains explanations of thefe eight rules in notation. It muft be remembered, that whoever is ambitious of playing thorough-bafe luithout figures, muft previoufly pof- fcfs the art of accompany!. ig readily with figures. See Composition and Counteki'oint, to which thorough-bafe is the beft introduftion : as what is good in playing, would be good, as far as harmony is concerned, in writing. In- 6 T H O vention, fancy, and good tafte, are necelTary to break thefe chords into melody. 'TnoKOVdH-lVax, in Botany. See Bupleurum. THORP Arch, in Geography, a village of England, in the county of York, where is a medicinal fpring, impreg- nated with fulphur and fteel ; 3 miles S.E. of Wetherby. Thorp, B'ljfhop's, a village of England, in the county of York, where the archbilhop has a palace, built by arch- bifhop Gray in 1241 ; 3 miles S. of York. THORPNESS, a cape on the eaft coaft of England, in the county of Suffolk, forming the fouthern part of Solebay. THORSAKER, a town of Sweden, in Geftricia ; 21 miles S.W. of Gefle. THORSBERG, a mountain of Norway, in the province of Aggerhuus ; 18 miles W. of Tonfberg. THORSHAVEN, a fea-port town of the ifland of Stromoe, and capital of ah the Faroer iflands, as well as the common market, and refidence of the landvogt, and king's counfel. THORSTORP, a town of Sweden, in Weft Gothland; 28 miles S.E. of Gotheborg. THOS, Thous, Bv:, in Zoology, a name given to an animal of the wolf-kind, but larger than the common wolf, common in Surinam. It is a fpecies of the canis, with a light bent tail, and white belly. It never touches men or cattle, and rather provides its food by cunning than open force ; preying chiefly on poultry and water-fowl. THOTCHI, or Thatchi Hotun, in Geography, a town of ChinefeTai-tary ; 36S miles W. Tourfan. N.lat. 42^52'. E. long. 83° 24'. THOTRA, a town of Hindooftan, in the circar of Ran- tampour ; ' 40 miles S.S.W. of Rantampour. THOU, James Augustus de, (Thuanus,) in Bio- graphy, an eminent magiftrate and hiilorian, was the fon of Chrillopher de Thou, prefident of the parliament of Paris, diftinguifhed for integrity and patriotifm, and born at Paris in the year 1553. In the college of Burgundy, where, he was placed at the age of ten years, his education was inter- rupted by a fever, which feemed for fome time to have proved fatal to him ; but upon his recovery he ftudied the civil law, firft at Orleans, and afterwards at Valence, under the celebrated Cujacius, in which latter place he com- menced an intimate acquaintance with Jofeph Scaliger, which was continued through life. Upon his return to Paris in 1572, he witneffed the horrors of the maffacre of St. Bartholomew, and this fceiie impreffed him with an eternal deteftation of bigotry and intolerance. He was originally deftined for the church, with the profpeft of valuable preferments, which his uncle, the bifhop of Chartres, intended to refign to him. In the mean while he travelled to Italy, the Low Countries, and Germany ; but upon the death of his brother, his views were changed, and the law became his deftined profeffioii. After the death of his father, whofe memory he held in high veneration, he was made mafter of requefts in 1584 ; and in 1587, he married Marie Barbanfon, a lady of a noble family. Upon the re- volt of Paris, on occafion of the league, in 1586, he repaired to Henry III. at Chartres, and was deputed by him to confirm the province of Normandy in its allegiance. On the aftaffination of the duke of Guife, his family at Paris re- ceived public infults, which made it neceftai-y for his wife to make her efcape in difguife, and he went to the king at Blois, who was almoft deferted, and induced him to form a coalition with Henry, king of Navarre. Being at Venice, he was informed of the alfaffination of Henry III., after which he immediately joined the legitimate fucceffor to the crown. T H O T H O Brown, Henry IV., at Clinteaudun. The king, fully ap- prized of his excellent (jualities, repofed confidence in him, and employed him in many intrrefting negociations. On the death of Aniyot, the king's principal librarian, De Thou was nominated his fuccefTor ; and in 1594 he fuc- ceeded his uncle as " prefident a mortier." He officiated as one of the Catholic commiffioners at the theological con- ference of Foiitainebleau between Du Perron and Du Pleflis Mornai ; ani)d land, he nominated Thrafybulus for one of his colleagues ; T H R but a mifunderflanding afterwards taking place between them, Thrafybulus impeached Alcibiades before an affembly of the Athenians, and procured his difgrace. On occafioH of the eftablifliment of the thirty tyrants at Athens by tht- influence of the Lacedsmonians, Thrafybulus was one of feve- ral other citizens who took refuge in the Theban territory ; and zealous for the emancipation of his country from fen'i- tude, he engaged a fmall body of fugitives to join him in an expedition to Attica, and took poflefllon of the important fortrefs of Phyla, on the frontiers of Bceotia. Befieged by the Greeks, Thrafybulus by his activity repulfed them, and even followed them in diforder to Athens. Having alfo furprifed a pofl: which they occupied near Phyla, the thirty tyrants removed from Athens to Eleufis, and Thrafybulus feized this opportunity of attacking the Pira:us, and his cnterprife fucceeded. He then iflued a jcoclamation, ani- mating the Athenians to refill their tyrants, and to re- ftore a free government. Having done this, he efl;abliflied himfelf in the Piraeus. The conflitution of Athens was then changed, by fubftituting infl;ead of the thirty tyrants, ten ma- giftrates, one from each tribe. The Lacedaemonians ftill retained their influence over thefe magiftrates, who fent to Sparta foliciting affiftance againft Thrafybulus. At length, however, this refolute commander prevailed fo as to open a negotiation between the Athenians and the Spartan govern- ment, which terminated in the withdrawing of the Spar- tan garrifon, and the re-eftablifliment of a popular conftitu- tion at Athens. This happy clofe of the conteft was fol- lowed by the union of citizens of both parties, in a folemn thankfgiving to Minerva at her temple in the citadel, when Thrafybulus exhorted them to future concord. The remaining tyrants at Eleufisendeavoured to foment diflenfions in Athens ; but the bufinefs terminated in an aft of amnefty or oblivion, which was paffed by the influence of Thrafybulus in the affembly of the people, and ratified by an oath. This revo- lution happened in the year B.C. 401. In accomplifhing this event, Thrafybulus afted with the moft difinterefted patriotifm ; for the thirty tyrants, when he feized the caftle of Phyla, had offered to make him one of their number, and to pardon any twelve of the exiles whom he might name ; to which offer he rephed, that exile was much more honour- able than any civil authority purchafed on fuch conditions. Thrafybulus remained for fome time in unmolefted retirement, enjoying the honour accompanying the olive wreath, which, according to the fimple manners of the age, was beftowed upon him for his fervices. But in the year B.C. 390, after the death of Conon, the foreign poffeflions an'd influence of the Athenians were in danger of being loil; and therefore a fleet of forty fliips was placed under the command of Tlrrafybulus, with which he failed to the Hellefpont. On this occafion he induced two Thracian princes to become allies to Athens, and compelled the Byzantines and the inhabitants of fome other cities to abohfti their ariftocratical governments, and accept of the Athenian model and alliance. He next pro- ceeded againft the ifle of Lelbos, in the Lacedaemonian inte- reft, and reduced the whole ifland to obedience. Thence he failed for Rhodes, having previoufly raifed fupplies from the maritime towns of Afia, and the capital of Pamphyha. He alfo indulged his men in private pillage ; and thus fo much provoked the inhabitants, that they made an attack in the night on the tents, and put a number of the Athenians to the fword, among whom was Thrafybulus himfelf. Such was the inglorious termination of a life that had been de- voted to the benefit of his native country. Corn, Nepos. Un. Hift. Gen. Biog. THRAVE, or Tjireai'E, of Corn, in moft parts of England, is twenty-four flieaves, or four fhocks of fix (heaves to T H R to the (hock : though, in fome counties, they only reckon twelve (hocks to the thrave. King AtheKlan, anno 923, gave by charter, to St. John of Beverley, four thraves of corn for every plough-land in the Eaft Riding of York(hire. " Ya fou threve be heaven king, Of ilka plough of eft riding." THRAUPIS, in Ornithology, a name given by many autliors to the bird more commonly called citrinella. THRAUSMA, a name given by the ancients to a kind of gum ammoniacum, which was drier than the common, and more eaiily crumbled to pieces. THRAUSTOMICTHES, m Natural Hi/lot y, the name of a genus of compound earths. The word is derived from the Greek 9j,oti/cro;, brittle, and fjm^u:, mixt. The bodies of this genus are loams compofed of fand and a lefs vifcid clay, and are therefore of a friable or crumbly texture. The earths of this genus arc generally ufed to make bricks ; and there are fcveral fpecies of them. Hill. THREAD, in the Linm ManufaBure, a fmall line or twill of flax, the weaving of which compofes cloth. There is a (Ironger kind made ufc of to few the feams of linen gar- ments, or to mend them. The fame term is applicable to cotton or wool. See Spinning. Thread, fays an eminent French writer (Pajot des Charraes), bleached by the oxygenated muriatic acid, may be ufed by the fempftrefs with much greater fpeed and briflt- nefs than thread of the fame quality bleached in the lield ; it is lefs brittle, and may be ftruck much more effe&ually home to its place in weaving, and does not move afterwards. This information, he fays, was received by him from impartial and unprejudiced manufafturers. The thread of the Laplanders is very fine, white, and f^ong, but it is of a very dilTerent natuce from our's ; they know nothing of flax or hemp, nor of any other plant whofe ftalks might fupply the place of thefe in making thread, but their's is made of the finews of the rein-deer. They kill of thefe animals a very great number continu- ally, partly for food, partly for the fliiiis, which they ufe in clothing themfelves, covering their huts, and on many other oecafions ; the fmews of all they kill are very carefully pre- ferved, and delivered to the women, whofe province it is to prepare this necelTary matter. They beat the finews very well, after having (ieeped them a long time in water, and then they fpin them out. The thread they thus make is of any degree of finenefs they pleafe ; but it is never any longer than the finew from which it is made. They ufe this in fewing their clothes, (hoes, gloves, &c. and the trappings of their rein-deer. The threads of the fame (inew are laid up together, and are all of a length ; and as the di(ferent finews alford them very different leTigths, they accordingly pick out fuch as the prcfent ufe requires, both in regard to length and finenefs. This fort ' of thread is made with much more labour than our's ; but it is greatly fuperior to it on many occafious, where ftrength is rither required than beauty. Thefe people have, befides this, a way of making a fort of yarn of (heep's wool, which they weave into garters and a fort of ribbands, ufed by way of ornament ; but they place no value on it, becaufe of its want of llrength. Scheffer's yi\k. Lapland. Thread, in Botany, is underftood cif thofe capillamcnts ufiially found in the middle of flowers, as in the )ily, tulip, Vol. XXXV. T H R rofe, &c. There are two kinds ; thofe which fupport apices, are particularly called Jlamina ; and tlujfe which have none, pijlilla. TiiKKAi), GolJ. See Gold. TurtKAD, rirgin's. See Virgin. TiiKKADs, y//V, a term ufed by fome to exprefs thofe fine long white filaments, or thready fubftances, which we meet with in vaft numbers floating about in the air in Auguft and September. The world has been much perplexed about the generation of thefe, till it was known that they were the work of fpi- ders, and that they fervcd thofe creatures to move from place to place by. They are long, downy, and very foft, and though they hold together when untouched, they ftick to the fingers in handhng, and eafily break with a fight touch. The general method of thefe creatures fpinning and weaTing the webs, is by letting down the thread, then draw- ing it after them, and fo difpofing it as they think proper ; but in the midft of their work of this fort, if they are clofely obferved, they will be fomctimes found to defift, and turning the tail to the contrary way of the wind, they will emit a thread with great violence, no lefs than that with which a jet of water is difcharged from a cock. In this manner they continue darting forth the thread, which the wind takes, and carrying it forwards, it foon becomes many yards long. Soon after this the creature will throw herfelf off from the web, and trulling herfelf to the air with this long tail, will afcend fwiftly, amd to a great height with it. The fragments of thefe lines, or the whole lines, and the fpiders attached to them, though unobferved, make thefe air-threads, and the ufe nature deftines them for, is evidently the wafting of the creature along the air, and giving it an opportunity of preying on gnats, and many other i.nfefts that inhabit the air, out of the re^ch of thefe creatures by any other means. When the threads are newly fpun, they are always fingle, and ai-e generally feen afcending higher and higher in the air ; but when they are feen coming down, they are found fometimes compofed of three or four others, and either without any fpider at the ends, or with two or three, or more. It is plain that this happens from the meetin-g of thefe threads one with another in the air, and their tangling together ; and this incommodes the creatures, and brings them down. Thefe are what fill the air with the loofe threads we fee in autumn ; and as thefe foon entangle together, and bring one another down, it is no wonder that they are more fre- quent in the lower regions of the air, than thofe with the fpiders adhering to them, which ufually rife to great heights, and fuftain themfelves there. And hence the origin of the threads was much perplexed among the enquirers, becaufe they were found without any mark of the animal to which they owed their exiftence. The bufinefs of feeding is not all the ufe of thefe threads, but the creatures evidently fport and amufe themfelves by means of them, floating about in the air, and changing height and place at pleafure. When a fpider has once raifed itfclf from the earth in this manner, it does not defcend always on the fame thread it arofe by, but draws that up at times, and winds it up into a hank with its fore -feet, and darts out another by way of fupport ; and the new thread is made more or lefs loijg, as it is intended for a higher or lower flight. Philof. TranC N'so. Thread of Glafs may be obtained of indefinite minute- nefs by means ol the blow-pipe. When no thicker than 4 C fiii9 T H R finf hair, it is extremely flexible and elaftic ; and if ftill finer, it may bP wound ;.lmort like common thread without brcakmir. The way of doing it is very limple. A piece ot .rlafn tube is heated in the lamp, aiid the end drawn out into a thread by means of another piece of glafs cemented to it. When a fine thread is once drawn, the end is carried round a reel or wheel two or three feet in diameter, and by turmng the wheel and continuing to heat the tube, an endlefs thread is drawn out, winding round it as long as the artiR pleafes or the glafs lads. The quicker the wheel revolves, and the hotter the glafs is kept, the firmer is the thread, which may thus be made as delicate as a fingle filk-worm's thread, with extreme flexibihty. Different coloured threads are made in this way by ufing very deeply coloured glalTes inftead of common glafs. TiiuF.ADs, in Glafs. See Glass. THREAF, in /igricuhure, a term fignifying a handful, a bundle, or a pottle, in different diftrids of the country. THREATENING Letters, in Law. By ftatute 9 Geo. I. c. 22. amended by flat. 27 Geo. II. c. 15. know- ingly to fend any letter without a name, or with a fiftitious name, demanding money, vcnifon, or any other valuable thing, or threatening (without any demand) to kill any of the king's fubjefts, or to fire their houfes, out-houfes, bai-ns or ricks, is made felony without benefit of clergy. This offence was formerly high trcafon, by 8 Hen. V. c. 6. The offence of fending letters, threatening to accufe any perfon of a crime punifhable with death, tranfportation, pillory, or other infamous puni(hment, with a view to extort from him any money or other valuable chattels, is punifh- able by flat. 30 Geo. II. c. 24. at the difcretion of the court, with fine, imprifonment, pillory, whipping or tranf- portation for feven years. Blackll. Com. book iv. THREATS, a fpecies of perfonal injury. Threats and menaces of bodily hurt, through fear of which a man's iiufinefs is interrupted, are comprehended under this de- fcription. A menace alone, without a confequent incon- venience, does not conftitute the injury ; but, to complete the wrong, there muft be both of them together. The remedy for this is in pecuniary damages, to be recovered by aftion of trefpafs, nti et armit; this being an inchoate, though not an abfolute violence. Bbckll. Com. bookiii. THREAVE. See Thrave. Three Chapters. See Chapter. Three Legs, Compajfes of. See Compasses. Three, Omhre by. See Ombre. Tiikee, Rule of. See Rule. T Hr-zs-legged Staff", an inftrument confiding of three wooden legs, made with joints, fo as to (hut all together, and to take off in the middle, for the better carriage ; and ufually having on the top a ball or focket : its ufe is to fupport and adjuft inilruments for ailronomy, furveying, &c. T ilUEU-polnted Pkl, in Agriculture and Rural Economy, a tool of the pick-kind, having the broad end formed in a three-toothed manner, about iix inches in length, of great flrength, and having the width, from the outfides of the teeth or prongs, of about fix inches. The other end is formed in the gently curving ordinary one-pointed manner. When complete, it is provided with a liandje of the ftrong wooden kind, inferted into the eye or focket of the head- part, TiiKzz-pronged Fori, a name fometimes applied to the common fork which is employed for various purpofes on farms. Sec Prong and Spud. TnREE-Jbare Horfe-hoe, a light threc-fltared top; cf the T H R horfe-hoe kind, for one horfe, which is often found very convenient and ufeful in working the intervals of ridged turnip crops, and thofe of fimilar kinds, as well as for different other purpofes of tillage hufbandry. It is conftrufted and wrought fomewhat in the form aiid manner of the common plough, the hoe parts being fo contrived and fet as to pare and clean tlie fides and bottom of each of the ridges in the fame operation. See Horfc- HOE. Three Brethren Hill, in Geography, a town of Scotland, in the county of Selkirk ; 5 miles N.W. of Selkirk. Three Brothers, three iflands in the Indian ocean. S. lat. 3° 44'. E. long. 62° 25' — Alfo, three iflands in the Ealt Indian fea. N. lat. 10° 42'. E. long. io8° Alfo, three fmall iflands on the coaft of Guiana, in the mouth of the EfTequibo Alfo, three fmall iflands in the Indian fea, near the E. coaft of Madagafcar. S. lat. 13° 20*. E. long. 51° 10' — Alfo, three fmall iflands in the Eaft Indian fea. S. lat. 5° 30'. E. long. 132° 15'. — Alfo, three fmall iflands in the Atlantic, near Prince's ifland. N. lat. \° 32'. E. long. 7°. — Alfo, three fmall iflands in the Eaft Indian fea, near the W. coaft of Am- boyna. S. kt. 3° 39'. E. long. 128° 18' Alfo, fmall iflands in the Eail Indian fea, near the S.W. coaft of Celebes. S. lat. 5° 25'. E. long. 119° 38' Alfo, fmall iflands in the bay of Gunong TeUu, on the coaft of Celebes. S. lat. 1°. E. long. 120° 27'.— Alfo, fmall iflands in the Indian fea. S. lat. 6°. E. long. 71° 36'. — Alfo, three hills on the N.E. coaft of Terra del Fuego ; 9 miles W. of Cape St. Diego. — Alfo, three hills on the E. coaft of New Holland, fo called by captain Cook. S. lat. 31° 40' — Alfo, three iflands on the Spanifli Main, near the Mofquito ftiore. N. lat. 11°. W. long. 82° 52'. Three Creek Run, a river of Virginia, which runs into the Nottoway, N. lat. 36° 36'. W. long. 77° 12'. Three Hill IJland, a fmall ifland in the Mergui Arehi^ pelago. N. lat. 10° 13'. Three Hills IJland, one of the New Hebrides, in the South Pacific ocean, about 12 miles in circumference. S. lat. 17° 7'. E. long. 168° 35'. See Hebrides. Three IJland Harbour, a bay on the coaft of Patagonia, in the Straits of Magellan ; 8 miles N.N.W. of Batclftlor's river. Three Iflands, fmall iflands in the Eaft Indian fea, near the E. coaft of Bintang. S. lat. 1° 10'. E. long. 105° 2'. — Alfo, fmall iflands in the Indian fea, near the coaft of Africa. S. lat. 4° 50'. Three IJlands Bay, or Harbour, a bay on the E. coaft of the ifland of St. Lucia. Three Kings, an ifland in the South Pacific ocean, near the N. coaft of New Zealand, difcovered by Tafman. S. lat. 34° 12'. E. long. 172° 12'. Three Rivers. See Trois Ri-uieres. Three Rivers Harbour, a bay on the E. coaft of the ifland of St. John, in the gulf of St. Laurence. N. lat. 46" 8'. W. long. 62° 10'. Three Sifters, three fmall iflands on the W. fide of Chefapeak bay. — Alfo, fmall iflands in the Eaft Indian fea. S. lat. 5° 42'. E. long. 105° 41' 36". Three Stone Oar, a rocl^ near the W. coaft of Corn- wall. N. lat. 50° 11'. W. long. 5° 32'. Three Sugar Loaves, fmall iflands in the Mergui Ar- chipelago. N. lat. 9° 13'. THRELKELDIA, in Botany, has been fo named by Mr. R. Brown, in memory of Dr. Caleb Threlkeld, a Dub- ~ lin phylician, who puhlifhed a Synopfis Stirpium Hiber^ica- 9 rum T H R T H K rum in 1727. Tliis 18 an alphabetical catalogue, princi- pally founded on the papers of Dr. Thomas Molyneux, or the communications of other people ; nor does it, accord- ing to our judgment, entitle its editor to any fcientific rank Brown Prodr. Nov. Holl. v. i, 409. — Clafs and order, IvianJiia Di^ynia. Nat. Ord. Holeraceei, Linn. Alripl'ucs., .Kifl". Chenopodf/c, De CaiidoUe, Brown. EfT. Ch. Calyx pitclier-fliaped, with an abrupt iimer mar- gin. Petals three, membranous. Stamens oppofite to the petals, inierted into the receptacle. Capfule membranous, imbadded in the pulpy perhianent calyx, Seed folitary, ovate. I. T. d'iffufa. Spreading Threlkeldia — Gathered by Mr. Brown on the fouth coaft of New Holland, and in Van Diemen's ifland, growing on the beach. This is a fmall, diffufe, fmooth Jhruh. Leaves alternate, fcmicylin- drical. Flowers axillary, fohtary, feffile, without bradeas. Seed furniflied with albumen, which is embraced by the circularly inverted embryo. Brotun. We have prefumed to take for petals, tliough by no . means pertinacioufly, what Mr. Brown, led by the analogy of the natural order of the plant, confiders as mere fcales belonging to the calyx. THRENGI, or Threnges, in our Ancient Cujloms, a denomination given to vafTals, but not thofe of the lowell degree, but fuch as held lands of the chief lord ; other- wife called drengi, or drenches. " Quia vero non erant adhuc tempore regis Willielmi miUtes in Anglia, fed threnges ; praecipit rex, ut de eis milites fierent ad defendendam ferram : fecit autem Lanfran- cus threngos fuo milites, &c." Somm. Gavelk. The name was impofed by the Conqueror : for when one Edward Sharnbourn, of Norfolk, and others, were ejefted out of their lands, they complained to the Con- queror, infilling that they were always on his fide, and never oppofed him ; which, upon inquiry, he found to be true ; and therefore he commanded that every one fliould be reftored to their lands, and be for ever after called drenches, or threnges. Spelm. Du-Cange. THRENODY, Threnodia, formed of Spnvof, mournful, and iiii, Jong, a mournful or funeral fong. THRESHER, in Ichthyology, a name fometimes given to the fea-fox. Thresher, in Agriculture^ a perfon employed in threfh- ing out grain and other feed crops by means of the flail. See Thrbshing, and Tnv.K%iu^G-Machine. THRESHING, the aft of beating out the corn or other produce from grain or other crops. Tlie flail was the implement formerly ufed for threfliing of corn, and which feparated the grain from the llraw and hufks effeftually and expeditioufly ; but which is now become mnch too tedious and expenfive, as well as liable to many other objeftions, and always bruifes a great many feeds, befides leaving many in the ears. It has been attempted to' avoid thcfe inconve- nicncies by proper machines provided with a number of flails, or other parts anfwering the fame purpofe, made to move by the power of water, wind, (learn, or horfes. Of thefe, various forts have been lately invented, and brought to very great perfeftion. See TuKY.snwfS-Machlne. Although there are many diff'erent methods made ufe of in feparating the grain from the ear of the corn, that by the flail is the moft general and common. Sometimes two perfons tlireih together : and where more than two are employed together, which is fometimes the cafe, there muft be frequent interruptions, and a confequent lofs of time. It is fuggefl.ed alfo, that the tool by which this fort of bufmefs is performed, fliould be well adapted to the fizc and ftrcngth of the perfon who ufcs it, for prevent- iag prejudicial fatigue. The bell method of attachiag tlic difterent parts of the implement together, is probably, it is thought, by means of caps and thongs of good tough leather. Iron is, however, fometimes employed. In the execution of the work, when the corn is bound into (heaves, it is ufual for the threfliers to begin at the ear-ends, and proceed regularly to the others ; then turning the flieaves in a quick manner by means of the flail, to proceed in the fame way with the other fide, thus finifliing the work in a quick eafy manner by their becoming loofe and open. It is, however, obfcrved by the author of the " Expe- rienced Farmer," that thrcfliing with the flail is uncertain when mofl: carefully performed, for the threflier may beat a long time and not meet with every head, which with the machine it is hardly pofTible to mifs ; and that the grain wafted by the ufe of the flail is certainly great. In ihort, he is of opinion that the corn loft by threfliing with the flail, is more than would pay for thrcihing it by the machine all over the kingdom. In fome places it is the praftice to threlh by the meafure of grain, as the bufliel, quarter, &c. while in others it is done by the threave of twenty-four (heaves, and in fome by the day. In whatever way the farmer has this fortof bufinefs perform- ed, there is always much ncceflity for his conftant infpeftion, in order to prevent the frauds and impofilions that are too frequently praftifed upon him by the perfons engaged in the execution of it. The flail practice, however, from its being fo extremely flow, tedious, and expenfive, and at the fame time requiring a great number of labourers, is perhaps only capable of being had recourfe to with advantage on the fmaller kinds of grain-farms, that are cheaply fituated in regard to the command of workmen, and where the expence of having large machines would be much too great for the quantity of grain which they produce. But even in thefe cafes, if the fmall horfe or hand threfhing engines that are conllruAed on cheap fimple principles, and which occupy but little room, (hould be brought to perform the bufinefs in an eafy, expeditious, and effeftual manner, which feems not improbable from the improvements that have been recently made in this fort of machinery, it will moft probably be to the advantage of fuch farmers to abandon it, as the faving in various ways muft foon repay them the expence of the machine, and at the fame time afford them a confiderable profit. It is moreover ftated, that where thre(hing is performed by the flail, expenfive barn-floors, either of the fixed or moveable kind, will conftantly be neceffary ; but that the latter fort may fometimes be capable of being converted to other purpofes, which may render it ufeful m other views and intentions, and thereby leffen the heavy charge of providing them. See THRESitiNG-F/oor. It is ftated by the author of " Praftical Agriculture," that the fuperiority of the method by machinery over that of the flail is very confiderable in many other refpefts, be- fides thofe of its executing the work in a much more clean and perfedt manner, more cheaply, and with much greater difpatch, fo as to admit of the farmer being prefent during the procefs in moft cafes. It has been further faid, that the flail is a tool which is only fit for the rude or favage (late of a people ; while the threlhing by the machine can be performed at any feafon, as when the weather is wet, and when no other fort of work can be done, efpecially of the out-door kinds ; and it will employ vvomen and children, or boys, as well as other 4 C 2 forts THRESHING. forts of labourer*. By the ufc of it, the farmer is enabled to get the advantage of markets, as he has thereby the power of felling and delivering almoft any quantity within a little time ; and by thrertiing out and placing the corn in a fccure llore room or granary, the great lofs often occa- fioned by vermin may be wholly prevented and removed. Numerous other beneficial confequences may likewife rcrult from the prartice of threfhing by means of machinery, but particularly that of faving the heavy expence of railing and upholding many different large buildings of the barn kind, on exlenlive farms of the arable defcription. It may be dated, that the writer of the Account of the State of Agriculture in the County of Kent, found, on having different parcels of wheat-llraw, of thirty-fix pounds each, thrcllied out clean by the flail, by different fiu-mers, ai.d the fame weight of llraw threfhed after it came from the machine, the average produce of corn left in the ftraw by the common mode of thiefhing was half a pint in every thirty- fix pounds of draw, more than that left in by the machine method. And that, befides, fufficient fupplies of both corn and ftraw may at any time be almoft immediately provided, cither for the purpofcs of feed, the market, or the feed- ing of animals, without the other operations of the farm being in any degree interrupted. It is likewife obtained w-ith much lefs wafte of the grain, and with lefs danger of its being injured by being bruifed. Likewife, that from the then increafing fcarcity of labourers, the great advance in the price of labour in all the well-cultivated diftrifts, and the impoflibility of having this fort of work performed in a clean and exaft manner by the flail, the necefllty as well as utility of the machine are eltablifhed. And it is further contended, that the principal obflacles to machines of this nature being more generally made ufe of, are thofe of ex- pence in their conftruftion and ereftion, and the littering flovenly praftice which prevails in fome of the more fouth- ern diftrifts of harvefting or fecuring tlie grain crops in a loofe uneven manner. But the firft of thefe objeftions may probably, it is fuppofed, be obviated by the conftruc- tion and introduftion of hand, or one-horfe, or ox-threfti- ing machines ; and the latter by the daily difcoveries that arc making in the improvement of this fort of machinery. It is conceived, that the oppofition that has been railed againft this praftice, on the ground of its baing calculated to deprive and prevent the labourers of employment during the winter feafon, is fcarcely deferving of notice, as expe- rience has fully ftiewn that no injurious confequences can rcfult from it, as there muft always be work enough of other kinds at fuch periods, where fanns are under a judi- cious mode of cultivation. It is on the whole fuppofed, however, that the faving of cxpence in this mode of threftiing over that of the flail, muft differ much according to the nature and manner of conftriifting the machinery, the power by which it is wrought, and alfo on the ftate and condition of the grain at the time of performing the operation, as well as the full manner and regularity with which it is fupplied and managed. By fome farmers it is confidered as nearly, if not quite, one half, while others make it much lefs than that proportion. But with the beft conttrufted machinery, there can be little doubt but that it will be performed on an average of different forts of grain, and different ftates of them, at lefs than one-third the expence of the flail method, without taking into the account any thing for the vaft faving in grain, in which fome reckon a profit of at leaft^ 5 per ctnt. ; others, as equal to the feed and prices of thrWhing, which is fomewhat more than half the price in the flail method ; or cither of the other operations that may be performed at the fame time with the fame machinery, fuch as thofe of winnowing or cleaning the corn, cuttujg ftraw into chaff, bruifing and grinding the grain for cattle food, breaking bones for manure, and various other purpofes and works. In addition to the advantages that have been chiefly con- fidered in refpeft to thefe machines, there is another which, in the then fcarcity of procuring labourers, and in- deed at all feafons and times, muft be of great importance to the fitfmer, which is that of their enabling him to per- form his work with greater certainty and convenience, and at much lefs expence of labour. It has indeed been ftated by a writer, in a late periodical work on farming, that with a machine, two labourers on a farm will be equal to four without it ; as they are left at liberty, during the winter months, for performing various other forte of farm labour. It has already been noticed, that the charge of this fort of work with thefe machines will vary confiderably, accord- ing to the manner in which they are conftrufted. In the Agricultural Survey of the County of Kent, the expences and produce of threfliing per day, in different forts of corn, with an engine of the common conftruftion, without the late improvements, are ftated in the manner following : F.Jlimate of ThreJInng Expences, l^c, by the Machine. For Wheat. Eight men, at jj-. ^J. each Four boys, at \s. each Four horfes, at 2s. 6d. each Cleaning and meafuring 24 qrs at 31/. each - £ o o o o J. 4 o o o ^3 4 This is aboiit is. ^. of the flail method. per quarter, or nearly half the price For Barley. £ s. d. 0 8 c 1 7 4 I '5 4 Cleaning and meafuring 3 2 qrs. at 3,/. eacli - Other expences, as above ... This is fomewhat more than half the price of the flail method, this fort of grain having of late been ufually thre/hed at about is. 6d. the quarter. For Oats. Cleaning and meafuring 40 qrs. at id. each Other expences, as before This is a little more than half the price of that by the flail ; this fort of grain being commonly threflicd at about is. id- per quarter. The expences are here, however, calculated confiderably too low for the fucceeding times, as the men would fince require 2s. or 2s. 6d. and the horfes p. or 6j-. each at leaft for the day. But in the improved machinery of this kind fewer hands arc required, and a number of other operations arc per- formed £ s. J. 0 3 4 I 7 4 I .10 8 THRESHING. formed at the fame time, which greatly leffens the cxpcnces of executing tlie work. In threfhing with a powerful improved machine belonging to Mr. Harbottle, on the Riminham farm in Berklhire, according to the writer of the Agricultural Report of that diftridl, the corapiu-ative calculations of expence and faving ftand as below. EJl'imate for Wheal. A man to feed the machine with fheavos, at \ per day - - - - - . A woman to throw up the (heaves into the flicaf-lhclf, at per day A girl or boy to hand and unbind the (heaves to the man who feeds, at the fame A man to riddle or fift the corn from cockles, or fmall chaff, at - - - A woman to affid him . - . - Two men to remove the draw, and to make") it up into bundles, at Zs. (>d. - 3 A boy to drive the horfes, and attend to their! paces, at - - - - - J In all eight perfons . - - - Four horfes, at "js. 6d. per day, a liberal 1 allowance ----- j Expence of thrediing zoqrs. which is done") in the day of labours - - j Ditto by the flail, at 3^. 6t/. per quarter, fuppofing a man can threfh a quarter in the day, which is too much Savmg by the machine in 2oqrs. Or by the quarter . - - - d. 6 o 13 } 2 3 6 3 10 0 I 6 6 0 1 4 EJlimatefor Barley. Two men to feed and loofe bands, at is. 6d. Two women to pitch up and fupply machine,! at SJ. each - . - . j Two women to riddle, at 8d. - . - Two men to remove ftraw, at 2s. 6d., and|^ one boy ditto, at u. 6d. - - S One boy to drive . - . . - In all nine perfons - . . - Pour horfes, at -js. 6d. each . - . I 0 I 4 0 1 4 0 6 6 0 I 6 0 •5 8 I 10 0 2 5 8 3 5 •9 o '] $ 8 H o labourers, the fai-mer (inding horfes. By this method, in York (hire, the work cods for wheat is. the quarter, and oats ()d. And in Northumberland they make ufe of a machine, wiiich threflies at the rate of 33 bufliels/ifr hour, or 264 in the day of eight hours. In this machine, the ex- pcnces in the attendance of the threlhing and drefling parts of it being menly that of three women ; one to feed in, another to hand the flieaves to the feeder, and a third to take away and riddle the corn after it is winnowed ; confe- quently the threfliing and drelTrng the above number of bufliels oidy coils \s. 6d., while the thrclhing the fame quantity by the flail would be ^Vth P^rt, or lo^bufhels, which at 2s. the bufliel is Zls. ; to which mull be added 2s. for the ex- pence of a man and two women to affid in winnowing, which makes in all 23;-. But in the Agricultural Survey of the County of Nor- folk, there is an account of the expence of thre(hing with the machine in comparifon with that of the flail, which furniflies a very different refult. The machine was built by a perfon from Leith in Scotland, for Mr. Bevan, and cod 100/. ; and' drongly diews, it is thought, that bad machines arc worfe than the old method of the flail. Ufual price by the flail, 2s. 2d. per quarter, 30 qrs. the quantity done in the day of 12 hours . - - - - Saving on the above quantity - . - Or by the quarter - - - - - EJthnate for Oats. Nine perfons employed, as for barley, andl the fame number of horfes - - 3 Ufual price by the flail 2j. /icr quarter, on' 40 qrs., the quantity done in the day of 1 2 hours . - . - Saving on the above quantity Or by the quarter . - - - It fhould be noticed, that thefe calculations arc made fully to the highed, which is fo much the more in favour of the machine. In fome of the northern diftrifts, the execution of this fort of bulinefs by the machine is fometimee undertaken by Threjhing by Means of the Flail. Forty coombs of barley, at -jd. come to To drelfing of ditto Fifty coombs of oats, at 6d. Drelfing ditto, at is. per fcore Forty coombs of rye, at gd. Drelfing ditto, at ij./ifr fcore Forty coombs of wheat, at is. Dreffing ditto . - - Threjhing by the Machine. Forty coombs of barley take eight horfes, at! 2s. Gd. 3 Ten men, at is. 6d. each - . - To dreffing ditto, five men one day Thus barley cods more by 17/. 2d. Fifty coombs of oats take eight horfes, at | 2s.6d. 1 Ten men, at is. Gd. each . - - - To dreffing ditto - . - . - Thus oats cod more by i^s. Forty coombs of rye take eight horfes, at 1 2S. Gd. J Ten men, at is, Gd. each - - . - To five ditto, at is. Gd. one day dreffing Thus rye cods more by los. Gd. £ s. d. > 3 4 I 5 4 1 0 5 2 0 6 1 7 6 I 0 10 2 0 0 I 12 0 2 0 0 2 0 0 2 2 0 o 15 o 076 o 15 o 076 o 15, o 076 Forty THRESHING. Forty coombs of wheat take eiglit horfes, at? € /. d. I O 0 o •^ o o 7 6 2 2 6 Ten men, at ix. bd. each Five ditto to droflinj; And wheat cods more by 6J. The calculations of the expences are here made greatly under the rate of wages and hire of horfes which has fince taken place. The above (hould lead the farmer to be caretul in put- ting up thcfc machines ; and to be certain of thei;- being conllrurted in fuch a way, as to aiifwcr the purpofe m a perfeft maimer before he begins the work. It is well obfervcd by Mr. Somcrville, in the Agricul- tural Report of Eaft Lothian, in caUing the attention of the public to the unrewarded merits of Mr. Mickle, in bringing the threfl\ing machine to a (late of perfeftion, that it is computed, by thofc who have paid every poffible at- tention to the fubjedl, that in Britain about 7,500,000 acres are annually employed in raifing grain, the produce of which, if averaged at three quarters per acre, amounts to 22,500,000 qrs. ; and, as it is admitted that the furplus quantity gained by the ufe of thrcfliing machines is at lead a twentieth part more than when the flail is ufed, it will appear that 1,1 12,500 qrs. would be faved annually, were the whole of the grain in the kingdom threflied in that way ; the value of which, if only calculated at 3 2s. per quarter, would be 1,781,250/. ; to which adding the favings of ex- pence, at IS. per quarter, upon 22,500/X)0 acres, wx. 1,125,000/., it would make the enormous fum of 2,906,250/. fterhng; a faft almoft incredible to any but thofe who have turned their attention to the fubjeft, and are well acquainted with the great difference between the threfhing-machine and the flail. All forts of grain (hould be in a proper, hard, dry con- dition, when it is to be threfhed out, otherwife the work cannot be performed in a clean and pirfeft manner, whether it is to be executed by the flail or the machine. It is a remark of the time of Lifle, founded on his own extenfive experience, that wheat threfhed in damp weather generally yields but little flour, with a great deal of bran, when it is ground ; and that if it be put into facks, it will grow mufty in lefs than three weeks, let the weather be ever fo dry afterwards : but if, on the contrary, it be threfhed when the air is perfeftly clear and dry, it will keep well in facks for a long time, efpecially if thefe are laid upon treffels high enough to fecure them from the damp- nefs of the ground or floor. But for keeping of the meal or flour, in general, there is no better way than firfl to bolt and clean it from the bran or huflcs, which is apt to make it mufly, and then to tread it down as hard as pofTible, and head it up clofcly in clean, dry, tight, and well-bound cafks, which muft be laid in a cool dry place. It may be noticed, that the beards of barley come off bell, in thrcfhing, when the fheaves or fwarths of this corn have taken the dew before their being houfed. It will keep well in the mow unthrefhed for one year ; but for making it into malt, which muft be done before the heat of the fummer comes on, it (hould not be kept above a year and a half, or at mod two years : otherwife it will be filled with weevUs or infefts ; unlefs it has been previoufly cured in a ftove or kiln. But oats, from their being defended with a double hufl^, are the grain leaft fubjed to harbour vermin. The beft way to keep them after they are threfhed, which (hould be done when dry, is to dry thera well on a kihi, and tlien to b;nTeI them up in clean clofc calks. i( As for beans and peas, they always threfti beft after they have fweated in the mow, which they are very apt to do ; as the whole crop of either of them never ripens altogether, the green parts heat, and communicate their ferment to the whole heap. The danger to be guarded again ft is, that they do not heat too much. For this reafon, farmers gene- rally choofe to ftack them without doors, rather than to houfe them ; that they may be the more thoroughly dried bv the fun and air. As beans are a very large feed, and confequently full of moifture, it is found beft to let thofc that are intended for keeping, fweat and feafon in the mow until March, when they may be threfhed without danger, for beans never give again, after they have once been thoroughly dried and hardened. And vetches, when wanted for fowing immediately after they are cut, may be threfhed very well on a hurdle, with a cloth ; though they then be too foft, notwithftanding their being ripe, to be threfhed "on a floor, where the flail and the threfher's feet would bruife and break them. In general, in the bufinefs of threfhing, as the work pro- ceeds, it will from time to time be neceffary to remove all the long ftraw from the corn beaten out of it, which laft always lies underneath, with a prong or fork, and then the pieces of ftraw, broken ears, &c. with a wooden rake. The remaining grain fhould then be (hovelled up on one fide of the floor, and the work be repeated till enough be thre(hed out to make what is commonly called a clearing. The heap (hould then be wholly paffed through a wide iieve, which retains only the bits of ftraw, and fuch fragments or ends of the ears as have efcaped the flail. Thefe frequently contain fome good corn, and form an ufeful fodder for moft forts of animals, being what are commonly called ca-v'ings, as feen below. Much labour may often be faved in the ufe of the fieve by faftening a loop to its rim, and refting it thereby on a hook fufpended by a rope. This will fuftain half the weight of the corn, and the neceffary circular motion may more eafily be given to it. After much threfhed grain has thus accumulated on the threfhing-floor, and the fliort ftraw and chaffy matter have been feparated from it, as juft noticed, by pafling it through a wide riddle or fieve for the purpofe, which (honld always be done before too much grain has been collefted, as in that way the bruiCng of it is more effeftually prevented ; it muft be put by to afford -more room. The fhort chaffy fub- ftaiyce thus feparated from the grain is in fome diftrifts de- nominated covings, or ca'vmg-chaff', and is capable of being employed with advantage, as feen above, in the feeding of horfes, or neat cattle and fheep. When this has been done, the loofe grain fhould be thrown into a chamber or other place conveniently formed for receiving it, where it fhould remain till a fufficient quantity has been collefted to render the clearing and cleaning of it by fome kind of machine for the purpofe, requifite. But the improved threfhing machines render this unnecefTary, as they drefs or clean it at the fame time it is threfhing out. See Winnowing Machine. Furze tops in their young ftates of growth are in fome northern fituations beat or threfhed by the flail, and in that way bruifed as horfe-food, where proper machinery for this purpofe is not at hand. The work-horfes during their ufe have Kttle other food, it is faid, though performing great labour. From the whole of what has been faid, it is evident that the farmer fhoidd always confider well before he decides on the mode of threfhing which may be the moft proper and advan» THRESHlNCx. advantageous, as well as t)ie moft fuitablc, to tlic fort of farm which lie holds. TiiUESiilNG-F/oor, the floor on which grain is threflied out in the barn or other place. All floors ot this fort fhould be well formed and conllrufted, of whatever fort of materials they arc made, as without it they -give way and fall to pieces. When the material employed in this inten- tion is wood, the timber (hould always be of the bell kind, and well feafoned, being put together in a careful and firm manner ; and when of the earthy kind, the difi"erent matters be well reduced, wrought together, and laid up for fome length of time before the floor is formed, being then laid down in a fmooth even manner, and made firm and folid by frequent ramming with a proper tool for the purpofe, until the flooring fubllance, whatever it may be, becomes quite dry. It has been obferved, that as grain is threflied out by machinery, from the circumllance of its being ieparated from the llraw immediately, and not permitted to remain upon the floor for above an hour or two, when brought to market, is always much drier, looks better, and brings a higher price than that which is threflied by the hand, and fuffcred to remain upon the floor for weeks, where it becomes mufty, lofes its colour, and is fo raw, that much of it is bruifed and rendered ufelefs in the working. There- fore, if the flail-mode of threfliing is flill purfued, it is fup- pofed that the inconveniences above-mentioned may, in fome degree, be remedied, by paying proper attention to the materials of which the floor is made, and raifing it fuffi- ciently above the reach of moiilure. Where the barns are very extenfive, and the price of wood uncommonly high, as is the cafe at prefent, a very good and durable threming- floor may fometimes be made by laying an uniform ftratum of round gravel, covering it with a coat of well-tempered clay ; above which, a mixture of clay, brick-dufl;, forge- afhes, and a fmall proportion of lime, will make it a hard uniform floor, proper and fuitable for the purpofe of threfli- ing upon. It is obferved that the brick-duft and forge- afties fliould previoufly be beaten very fmall, and well in- corporated with the clay, ufing a fufiiciency of water to bring the whole to the confiftcnce of mortar ; in that ftate the lime, having been previoufly flaked, fliouId be incor- porated with the other ingredients ; the whole fmoothed over with the back of the fpade, and allowed to remain in a round heap for two or three weeks, at the end of which time it fliould be turned over in the fame manner as plafter lime, and after being rendered fufFiciently foft with water, it may be fpread upon the floor, an operation that will require fome pains on the part of the workman. The floor, in the flrfl: inllance, fhould have the coat of clay, that is laid above the gravel, rendered perfeftly fmooth and uniform, by rolling, beating, or otherwife ; the finifliing coat, compofed of the mixture above-mentioned, may then be applied, taking care to break the furface of the clay with fhallow lines, in the way praftifed by plaiterers, for the purpofe of making one foat adhere to another in a finn and perfeft manner. Many other forts of materials, fomewhat of this nature, are made ufe of for threfliing-floors in different .diftrifts of the kingdom. The following plan has been fuggefl:ed as the means of excluding rats and mice from the barn and threfliing-floors. Firft, that when the floor is entirely of wood, the fpace between the fleepers, upon which the boards are laid, (hould be entirely filled with waflied gravel, well beat down, an operation which, when properly done, will effeftually pre- vent the entrance of either rats or mice ; where this precau- tion is not taktn, when- the floor is laid, .openings ibould be made at the bottom of the wall large enough to admit cats, a contrivance that will have the two-fold cftedl of deilroying the vermin, and afl"ording a free circulation of air. Secondly, that when the floor is of clay, the vermin generally burrow under the foundation, and have the entry to their retreats at the bottom of the wall : in fucli cafes, their accefs into the barn will be, in fome nieafurc, if not entirely, prevented, by mixing a confidcrablc quantity of broken glafs with the materials with wiiicli the threfliing-floor is made. It does not appear necefl'ary lo mix the glafs with the clay over the whole floor ; perhaps two feet from the wall quite round will be fufficicnt. And thirdly, that the top of the wall, as furniihing a temporary retreat for vermin, deferves alfo to be noticed : in every inllance it is cuftomary for the mafon to level the top of the wM previous to the roof being put on, which, when the building is finiflied, is left in that Hate, by which a confiderable fpace remains for the flielter of rats and other vermin : to prevent this, as foon as the roof is finiflied, the building of the wall on tlie iniide fliould be continued upwai'ds till it joins the roof, to which it fliould he clofely united by hard plailering. It is fuppofcd, by thefe precautions, and fmooth plaft^ering, the walls of barns as well as the threfliing-floors may be preferved free from vermin. "TiiREHHiKG-Machine, an engine of the mill kind, con- trived for the purpofe of threfliing grain, feeds, and pulfe out of the ilraw or the ear. This is a fort of mill or machine that has been chiefly con- ftrufted on the fame principles as thofe of the flax-mill, and which is capable of being wrought by different powers, as thofe of horfes, oxen, wind, water, and ft:eam ; but thofe of water and animals are the mofl; proper and convenient in moft inftances : in fome cafes, the grain being beaten or fwingled out of the ears by means of beaters attached to a cylinder that has much velocity, while in others it is rubbed out by fuitable means againft: confined cylinders, as will be more fully feen and explained in what is faid below. There is fome reafon to fuppofe, that the original hint or notion ot thefe mills or machines, was derived a long time ago from Holland or the Low Countries, and thence brought into tlie northern parts of this country, where the different parts of the machinery of them have fince been gradually undergoing much modification and improvement, to render them more fuitable and efficient for the purpofe ; fo that they have now attained a confiderable ftate of per- feftion in moft parts of the kingdom. The firft of thefe im- proved machines was, as Mr. Somerville fays, invented by a Mr. Menzies, brother to the then fheriff' depute of the comity : the machinery was driven by a water-wheel, which put in motion a number of flails of the fame kind with thofe ufed in threfliing by the hand. Trials made with thefe machines were fo far fatisfaftory, that a great deal of work was done in a given time, but owing to the velocity required to do the work perfedly, they foon broke, and the invention fell into difgrace. Some time in the year 1758, another attempt was made by a farmer in the parifli of Dumblane, in Perthfliire. His machine was conftrufted upon principles fimilar to the flax- mill, having an upright fliaft with four arms inclofed in a cyhnder, three feet and a half in height and eight in diameter, within which the fliaft and its arms were turned with con- fiderable velocity by a water-wheel. The flieaves, being prefented by the hand, were let down from the top upon the arms, by which the grain was beat out, and together with the ftraw defcended through an opening in the floor, where they were feparated by riddles and fanners, alfo turned by the water-wheel. And THRESHING-MACHINE. And it is added, that, aboiit twenty years after this, a third attempt was made by a Mr. Eldcrton, near Alnwick, and a Mr. Smart, at Wark, both nearly about the fame time. Their machines were fo conUriiacd as to ad by rubbing, m place of beating out the grain. The Iheaves were carried between an indented drum, about fix feet in diameter, and a number of rollers of tlie fame defcription ranged round the drum, towards which they were prelTed by fprings, in fuch a way as to rub out the grain when the drum was turned round. Upon trial, this method of conftruAion in thefe machines was alfo found defeftivc, as along with its doing very little work in a given time, it bruifed the grain, and fo materially hurt its appearance, as to Icffen its value confider- ably in the markets. It is furtlier ftated that the machine, in its then imperfeft Hate, was fccn by the late fir Francis Kinloch, bart. of Glimcrton, a gentleman well acquainted with mechanics, and who had paid much attention to country affairs : it occurred to him, that the machine might be rendered more pcrfeA, by inclofing the drum in a fluted cover, and fixing on the outfidc of it four fluted pieces of wood, capable of being raifed a little from the circumference by fprings, in fuch a way as to prefs jgainft the fluted cover, and to rub out the grain as the (heaves paffed between them ; but after repeated trials, it was likcwife found to bruife the grain nearly as much as the model from which it was copied. In that Hate it remained for fomc time, and was afterwards fent by fir Francis to a very worthy and ingenious charafter, Mr. Micklc of Know-Mill, in his neighbourhood, (a mill- wright by profefTion,) who had for a confiderable time em- ployed his thonghts upon the fame fubjeft. After much confidcration, and feveral trials, it appeared to Mr. Mickle, that the purpofe of feparating the grain from the ftraw might be accompliflicd upon a principle different from any that had hitherto been attempted, namely, by llcutches ail- ing upon the fheaves by their velocity, and beating out the grain, in place of prefling or rubbing it out. Accordingly a model was conftrudled at Know-Mill, in which the grain was beat out by the drum, to which it was prefented through two plain feeding rollers, which were afterwards altered for fluted ones. The firft machine, on a large fcale, executed upon this principle, was, it is faid, done by a fon of Mr. Mickle's, for a Mr. Stein of Kilbagie, in the year 1786, which, when finilhed, performed the work to the fatisfaftion of all parties. A patent was afterwards apphed for and obtained in 1788. Since that period, as well as the firft introduftion of thefe machines, many other improvements have been made on them by different ingenious artificers in many different places ; a fcrcen has been added for the grain to pafs through into a winnowing machine, and a circular rake to remove the draw from it ; as before this addition, the ilraw was forced out from the beater upon the upper barn-floor, and required much time and labour in (haking and putting it into order, which by this contrivance is faved. And befidss hav- ing a fuflTicient degree of velocity, without its being fo great as to injure the machinery, it is found that a point upon which the clean threfhing of all forts of grain materially de- pends in the ufe of this machine, is the management of the ij-on covering, under which the beating-wheel, having fix of' more beaters, moves : in fome machines this is fixed, v/hilc the beating-wheel is capable of being raifed or de- preffed at pleafure ; but a more late improvement is to fender the iron roof moveable and the wheel fixed, the i^on bcmg placed foclofe to the beaters, that the grain is rubbed as well as (haken out of the car. And in fomc cafes the beaters arc fomewhat rounded, but the flat form is probably t)etlcr. I J Different machines of this fort are alfo faid to have been lately conftruAed fo as to work with chains inftead of cogs, and to perform the bufinefs in a fatisfaftory manner. Another great improvement is likewifc believed to have been made on the feeding rollers ; which is that of having the upper roller, inftead of being one folid cylinder of wood, with rods of iron fixed upon it, as was formerly the cafe, an oftagon or decagon of caft iron, and divided into four parts, which are loofely joined into each other, fo that in turning round, each part can rife or fall in a feparate manner, accord- ing as the corn is fpread out ia a thicker or thinner way. The advantage is, that by means of this contrivance the corn is regularly held ; whereas, by the roller being all of one piece, if at one part the grain fhould happen to be more in a heap or lump than at another, the whole roller is raifed, and a great part of the grain paffes through, without having been held fufficiently to the beaters, and is confequently imper- feftly thrcfhed out. This fort of machine is fometimes conftrufted with a vertical Ihaft, on which is fixed in a horizontal manner an iron bevil wheel, fix feet in diameter, which drives another about eighteen inches diameter upon a tumbling ffiaft, upon which is alfo an iron fpur-wheel, three feet fix inches ia diameter, driving one about ten inches upon a fliort iron (haft, which likewife carries a drum or pulley, three feet fix inches in diameter, from which a fix-inch ftrap drives one nine or ten inches in diameter, hung upon the iron fliaft or fpindle which runs quite through the wood-beater or barrel, two feet in diameter, and three feet in length, having fixed upon it, by means of ftrong fcrews into its iron bonds, twelve wrought-iron bars, about an inch fquare, which beater making upon its horizontal axis about three hundred revolutions in a minute, and confequently nearly three thou- fand fix hundred ftrokes in that fpace of time ; the corn being carried to it by means of a cloth, which is moved forwards by rollers, lying nearly upon a flat furface of fix feet long, by three feet wide, two to three feet high from the ground-floor, which is a very convenient pdfition to feed upon, and palling between a pair of fluted rollers, over a bar, comes in contact with the beater, through a cavity, which may be varied by fcrews, from an inch in width, to the thicknefs of a grain of corn, when the ftraw is imme- diately delivered, perfectly clean upon the floor on the out- fide of the machine, no more injured for thatch, or other purpofes, than by the flail, and the corn in its paffage under the beater is filtered through a wooden frame to the floor, where it remains for removal. Upon this kind of threfhing- machine many different trials have been made in the view of afcertaining what fort of power, conilruftion, and velo- city or fpeed, would produce the bell and moft beneficial effects on the work, and many improvements have been fuggefted which we have not room for reciting. Some machines of this fort have large wooden fly-wheels, of from twelve to fifteen feet diameter, fixed upon the tumbling-fliafts, which run over or above the horfe's heads, perhaps made of fir-timber, as cork unfortunately is feldom to be met with ; but as their fpeed, in fuch a fituation, can rarely afford any affiftancc, the lighter they are, the lefs impediment, it is fuppofed, they wiU produce. The bars or beaters are alfo fometimes as much as an inch and a half, or two inches thick, from the barrel or roller upon which they are fixed, and the roller itfelf three feet or more in diameter; but fo much of the bar is certainly, it is thought, unneceffary, as exceeds the length of ftraw drawn in by the rollers, during each interval between the ftrokes, and which is feldom more than half an inch ; confequently, whatever is more than three quarters, produces an increafed impedi- ment. THRESHING-MACHINE. mont. The greater tlie diameter of the fame beater, from •meeting with the principal refiftance, io much farther from the centre, of courfc, the proportionately greater power is required to work it ; but this lail defcription of beater is faid, in general, to be found to make the bell work, and the reafon is thought obvious : they are necelTarily driven by water, lleam, or a number of horfcs, and, it is concluded, calculated to make the fame number of revolutions in a minute as one of two ieet, in which cafe their velocity, on which all depends, is jull half as much more — a moll im- portant point indeed. The means of regular Heady driving is likewife of material importance in all machines of this nature, where animal labour is necelfary. A very powerful imjjroved machine belonging to Mr. Harbottle, of the Riminham farm, near Henley on Thames, confifts of a horfe-wheel which contains 136 teeth, or pinion wheel with 26, a large wheel with 88, another with 21, the fame with 88, and a further one with 21, forming the drum. Underneath the drum is the contrivance for winnowing, or the wheel that feparates the chaff from the corn, by blowing it back into a bin below the feeder, and allowing the corn to fall into a box, froin whence it runs. Every revolution of the horfe-wheel in this machine produces eighty-eight and a half of the drum ; and as the horfe-wheel goes about three rounds of twenty-four yards each per minute, or two miles and a half in an hour, the drum of confequence muft revolve on its circumference, of three yards and a half, 265 times in a minute, or 927 yards. The feeding-board is five feet four inches wide. The drum-wheel is four feet four inches dia- meter, being covered with ftieet-iron, and has four beaters, which project four inches ; making the above number of re- volutions to one of the horfe-wheel, and the horfes going the above diftance in the hour ; in a path twenty-feven feet diameter. The cogs of the wheels are of white thorn pro- perly feafoned, working into others of caft-iron ; payed only with black lead, not any greafe being employed. The level of the flage on which the men ftand to feed, is eight feet above tho barn-floor in which the machine is fixed. The drums of threlhing-machiues, it is remarked, in ge- neral revolve from fixtv to a hundred times for one revolution of the horfe-wheels ; and that in proportion as thefe move flower, the horfes mull go fader, fo that the utmoft nicety is neceiTary to properly adjuil this : as if the horfes are under the neceflity of trotting, they are greatly injured in long con- tinued exertion, and if they move too flowly, the work is im- perfeAly perfo'-med. A Heady common walk is the pace at which horfes fhould be kept, and the drums of machines iliould be formed accordingly, in order fidly to efFett their work, and at the fame time to enable the horles to do a good jday's labour without too much fatigue and inconvenience. This machine will threfli, it is faid, from twenty to thirty quarters of wheat in twelve hours in great perfeflion ; from thirty to forty-five of barley in the fame time ; and from forty to fifty quarters of oats. It threflies every thing per- feftly clean when the grain is in {heaves. But though it cleans the, corn from chaff, as feen above, winnowing is re- quired afterwards. It was feen with one feeder to threfli twenty -two large and long (heaves in three minutes, without any variation in the ordinary movement of the horfes. This machine was conflruiled by Elhott of Hexham, in Northum- berland, and coil about 200/., without the expences of fit- ting up, &c. It is ftated, in the Eflex Agricultural Report, that Mr. Newman of Hornchurch has a threfhing-mill which was built by two young niillwriglits from Somerfetfliire, in which there are two new circumllances of improvement, one of i\';hich is a movement fo prepared, as that the perfon who Vol. XXXV. fVeds the mill, by putting his foot on a pedal can lift one of the fluted cylinders out of its work, fo that the wheat -ears having been advanced far enough to be threlhed, the draw may be drawn back again and be prevented from being broken ; the other is a click, or iron, which admits the liorfes to be flopped fuddenly without Hopping the beaters ; by which the couneftion is removed for a moment, fo that one operates without tiie other : this is of capital im- portance in working the machine. Reprefentations of thefe unprovements are given in the above work. Thefe machines have occafionally grinding-mills combined witii them, and are in this way found very convenient an^ advantageous. The Hon. Newton Fellows, in Devorvfliire, has been at very great cxpence, it is faid, in erefting a threfliing-mill connected with one for grinding, both of whicii are wrought by a never-failing flream of water. The power of this mill or machine is laid to be calculated as equal to fixteen horfes. And together with its power and capability for threfliing, winnowing, and drefling every kind of corn, the pair of flones for grinding attached to it are about four feet in diameter, to wliich a bolting-machine or apparatus is added. In working, this threfliing-machine is capable of difcharg- iug about twenty-five bulhels of wheat, and nearly forty bufliels of barley or oats in the hour. The barn, or place where the machine is placed, being filled with the wheat or other corn ; the manual afTillance for performing the bufi- nefs is diflnbuted through it m this manner : one man and two women for unbinding the flieaves of corn and feeding the rollers, which lafl are grooved and divided into lengths of fix or eight inches : on the flraw b'^ng difcharged from the machine, one perfon attends to ihake it well over a large open fcreen, whence it is tolled over to another perfon, who removes it out of the way. At and under each of the win- nowing-machines, fieves are placed to receive the grain com- ing direClly from the machine, which is then put into the hopper of the fan of the fecond winnowing-machine, from which it is again received into another fieve, and thence dif- charged into the hopper for grinding, for the market, or for other purpofes : in pafling through this little fan, fuch a feparation takes place as completely to divide the head from the tail corn. A cyhadrical pearl-barley machine or apparatus is alfo applied and ufed to cleanfe the wad of its fmut, and thus by taking oft' the downy end of the grain, a much finer fample of both wheat and flour is obtained. This is preferred to the brufli apparatus ; for although that may cleanfe the body of the grain, it will not carry off the down from its end, which may reafonably be fuppofed to con- tain the germ of fmut, or to form the nefl of otiier animal- culte equally injurious to fuch grain when ufed as feed on lands. There is in this machine only one labouring man employed to five women, which is an advantage of great importance in many fituations. The introduclion of fuch machinery as this is therefore of great benefit in bettering and improving the rural condition of the country. But, befides machines of this fort being conflrufted for performing the different operations of threfhing, winnowing, grinding, and bolting, they have fometimes contrivances for other purpofes, as an iron hopper axis for grinding apples ; and a contrivance for fhelling clover feed, and the haddocks of wheat. Thefe two additions belong to a threlhing- machine of Mr. Vinns in the above diftridt ; and fome others are occafionally met with in other places which are a httle different in their nature, but unnecefi'ary to be here de- fcribed. In the general conftruftion of thefe machines, they are" 4 D commonly, THRESHING-MACHINE. lommoiily, fts ha» boon fci-n, made of two defcnptions, large arnl fmall kinds ; tlio former of which probably not only perform their work more cxpcditiondy, but m a more p<-rfea manner, though their cxpencc is an objeaion to tlicm on finall farms. They require ver^- different ftrength of teams or other powers in working them, accordmg to their lizes, the nature of their eonllruttion, and other circum- Itances. ... , It is llated, that in feme large machines of this kuul, the rollers t.ike in about three hundred inches of grain in a mi- nute. The medium length of the Uraw being eilimated at about thirty inches, and fuppohng half a ihcaf to be ii,itro- duced into the machine at a time, the whole flieaf will be equal to tixty inches, and the machine, when fupplicd with a middling quantity of water, will threili five (heaves in a mi- nute. But in rcfped to tiie performance of thefe mills, much mull depend on the attention with which tliey arc fed, as a fmall ncgleft in this point will make a ver)' confiderable difference in the quantity of work that is performed in a given time. In regard to the expencc of thefe machines, it muft de- pend upon t!ic fi/e and power which they pofTefs of per- forming work, the number of other operations which they perfonii at tlie fame time, and whether they be fixed or moveable. According to fome perfons well informed on the fubjcft, a fixed mill that requires the power of two or three horfes, will coll from fixty to a hundred guineas. This will threlh about fifteen quarters of wheat, and from that to twenty of barley, oats, peas or beans in the courfe of eight or nine hours. It is noticed, that the only defeft of machines worked by wind, upon their firft introduftion, confided in the rilk to which they were expofed, by flopping them to take in the fails, which could fcarcely be done during a brifk gale : in that way it fometimes happened, that when the wind frefhened confiderably after the machine was fet a going, either the fails were torn to pieces, or the arms broken off. That defeft, however, is now remedied by a late invention of Mr. Mickle, by which the whole fails can be taken in, or let out, in lefs than half a minute, merely by a perfon puUing a rope within the houfe ; by this con- trivance the fails are, with eafe and expedition, proportioned to any degree of wind, an uniform motion is produced, and all danger of draining or hurting the machine is avoided. It is further obferved, that the number of hands required for working one of thefe machines, is from five to fix ; but that this depends greatly on tlie conilruftion of the machine, fome of them being fo contrived, that the work can be per- formed with much fewer hands. It is, however, noticed in the Agricultural Survey of Norfolk, that a machine erefted by Mr. Johnfon, at Lemp- fton, appears to be one of the beft, if not the very beft, of the larger kind that has yet been met with. The movements in it are uncommonly fmooth. It requires from fix to eicrht horfes, fix men, and one woman ; it threfhes, without any quef- tion, much cleaner than the flail, and, without any doubt, cheaper. To bring it to its prefent perfeftion, as he was determined to carry his point, he never flopped till it worked to his mind ; and having completed it, the repairs fince have been quite trifling. The common complaint of their being always out of order is attributed to original errors or inat- tention in the conftruftioH of them. ' The arrangement is excellent, it is faid, in this machine, for difpofing of the chaff, colder, ftraw, and corn, at once, in their refpeftive places, without any confufion or after-removals ; and it takes up a verj- fmall part of a barn. It was built by Mr. TV igful of Lynn. Mr. Whiting, of Fring, has alfo a large threfhing^- mill, built by Mr. Fordyce, an engineer from Scotland. It coll him 200/. : is worked by fix horfes ; threfhes twenty-four coombs of wheat in the day, fifty-five of barley, and from fixty-three to eighty-four of oats. It has five beaters on the drum-wheel, and the fluted fegment of a cylinder which covers tlie drum in two parts, with an un- fluted plate between them, which is raifed or funk by a fhort lever : this is a guard againft Hones getting in. In another circumflance alfo it is fingular ; there is a long platform, with a rolling cloth bottom : the whole raifed or funk at pleafure, for delivering the corn, acrofs the floor fpace of the barn, from the gofF in which the corn is ftacked, to the other end in which the mill is built; which faves much la- bour, and works to his fatisfaftion. The horfe-wheel is liere upon a different conftruftioii from the common ones, working by a cogged-wheel of fmall diameter below, inftead of above the hories ; and the com- municating fpindle under their path ; but it is faid to be hard work. And Mr. Coke, of Holkham, is ftated to have a very large machine, which coll about 600/. Befides threfhing, it grinds corn, works two chaff-cutters, and breaks oil-cake. It threfhes fixty-four coombs a day. Mr. Reeves, of Heverland, has a threlhing-mill which is, the writer thinks, llill nearer to perfeftion than any other he has feen ; it was made by Albey, works with two or three horfes, and coll a hundred guineas. He found it at work, threfhing oats ; it does for barley as well as for any other grain, threfhing thirty-two coombs in a day of feven hours and a half; more of oats; forty of peas; and thirty of wheat : its day's work of wheat, threflied the day before he faw it, was thirty-one coombs, which were Handing facked in the barn. It varies confiderably in the beating-drum cylinder from the others he has feen, it being of a much larger diameter, and has eleven beaters. At Brightwell-Grove, in Oxfordfhire, according to the Agricultural Report of that diftrift, there is a threfhing- raachine, belonging to Mr. Lowndes, which was conflrufted by Raflrick, and in which there is fome novelty of con- trivance : it works by means of four horfes : the drum- wheel, in this cafe, is three feet and a half in diameter, makes two hundred and fixty revolutions in a minute, and, having fixteen beaters, it gives 4160 ftrokes in that time : there is a rake with four fets of teeth which takes the ftraw, and delivers it to a fecond drum-beating cylinder two feet in diameter. This drum is termed the dreffer, and turning in an oppofite direftion to the motion of the ftraw, beats it down, and in its defcent ftrikes it againft a circular board, faced with bars Ihod with iron, through the fpace of eighteen inches, by which the ftraw receives feveral additional ftrokes, which, it is conceived, have a great efFecl in diflodging that corn which has not been completely feparated in pafTing the principal drum. This is the addition not ufual in thefe ma- chines. Thefe are wrought four hours at a time, in which eight quarters of wheat are threfhed out. Every thing is threfhed perfeftly clean ; and the ftraw is not broken more than by the flail. Twelve quarters of barley are threfhed in four hours, and fixteen have been done in that length of time. The horfes, in this machine, are not attached in the draught, in the manner which refembles pufhing, by ad- vancing with the lever before them, but in the common drawing method, with the lever behind them, in which way they are fuppofed by fome to do the work much better. This machine was feen to threfh forty-three ftieaves in ten minutes. It dreffes at the fame lime ; and there is a chaff- cutter. THRESHING-MACHINE. cutter, as well as a corn grinding-mill with ftones, for farm life, attached, and wrought or not, at pleafure. It is perhaps only in places fituated in the immediate vi- cinity of a colliery, and where, from the cheapnefs of fuel, they are capable of being worked at a very trifling expence, that fteam can be had recourfe to as the moving power of tliefe machines. See Stkam, and SrEAM-Engine. With regard to fmall machines, it is faid in the Eait Lothian Agricultural Report, that they have been intro- duced there, upon a reduced fcale, at a price fo low as 40/. : that thefe fmall machines, having little work to do, and that little being, in general, done flovvly, anfwer the purpofe tolerably well ; but though cheaper in the firft in- ilance, they are, in the end, more expenfive than larger ones, a certain degree of ftrength being abfolutely requifite to do the work perfeftly. If the parts of the machine are below that degree of ilrength, the work is either ill done, or the machine is deftroyed, by being exerted above what it is able to bear. The writer of the Eflex Agricultural Survey too Itates, that in that diilricl at prefent many are made by Balls of Norfolk, the price fifty guineas, and do their work very clean and well for all forts of corn, but do not drefs. They liave been apphed to white clover, and have done it to the fatisfaftion of the growers, by palling it through twice or thrice. In one eredled by Mr. Vaizey, which is worked by horfes, one man feeds, two fupply, a boy drives, and two men clear away the ftraw. He has threfhed lixty quarters of wheat with it in eighteen hours. It coft 52/. 10^., and 10/. putting up; the (bed added about 20/., two win- nowing macliines 15/. ip.; in all, complete, about lOo/. But in this a greater number of horfes are ufed than are noticed above. The owner has no fault to find with its performance, but is very well fatisfied with it. He has applied it to cobbing white clover with great fuccefs ; by pafling it thrice through the mill, he got from three jags, feven bufliels of clean feed in four hours. And one built by Dickfon of Ipfwich, for Mr. Sanxter, goes with two or four horfes, and coft fifty guineas. It is fuppofed that it will threfh twenty quarters of wheat per diem. But it is now fifty-five guineas, put up and ready to work. Two horfes work it, without hard labour. The laft year's wheat, which was very badly threfhed at 7^-. per quarter, was done by this machine perfeftly well. Alfo at Little Wakering, Dr. Afplin has a machine which the writer faw working with one horfe, which moved with great eafe, driven by a little girl ; one man and two boys work it, and it does three quarters of wheat in a day. The writer examined the ilraw ior about a quarter of an hour, and did not find a Cngle kernel in it. The price is fixty guineas. The con- ftruftion in this machine varies from the others he has feen, iu the wheels which communicate the motion. The doftor threfhes only wheat with it, though it will do for all forts of grain. He thinks it anfwers greatly, and is perfeftly fatisfied with it. It was made by Turbot, Bankfide, Weft- minller, but they are now made by Jones, Clement's-Lane, Clare-market, London. There are many other perfons who put up thefe machines at an equally reafonable rate, and fo as to work witli much perfeflion. Where machines of tliis fort coft about one hifndred guineas, the annual expence m iiitereft of capital and re- pairs cannot be more than from 10/. to 12/. at moft, except in the expences of teams and tlie labour of the pcr- ions employed in the execution of the bufinefs and work ;!bout them. The expenfive machines which have rollers for rubbing out the grain inftead of beaters, are thought in general t(» perform the bufinefs in the moft perfeft manner, though they require more power to work tliem. It is, however, thought by fome to be utterly impoflible to build threftiing-machines which will do juftice to the owners for any fucli fum as 50/., or thereabouts, as their durabihty and fuccefs depend materially on tlieir firm- nefs, ftrength, folidity, and other circumilances of the fame nature, which are by no lueans attainable for any fuch money. Yet many of thefe fmall machines of one or two horfe power, are iaid to perform their work well, and at the rate of fix quarters of wheat, and the relative propor- tions of other forts of grain, in the courfe of the day. They are ftated to be made in feveral different diftrifts, at the prices of from thirty to fifty guineas, fo as to threfti well at nearly the above rate, and to have, in fome inftanccs, other additions, fuch as chaff-cutters, &c. made to them. In particular cafes, they are thought not to break the wheat- ftraw fo much as tlie flail ; and though wheat and beans are moftly well threftied by them, barley is under the neceffity of being often twice paffed through fuch machines, as feen above. They do not drefs in general ; but fometimes head feed clover in a pretty perfeft manner, as noticed already. Small threftiing-machines have likewife been conftrufted fo as to be wrought by hand, in fome diftrifts, both in the northern and iouthern parts of the kingdom, and been af- ferted by fome to perform their work in a clean and fatis- faftory manner ; but from their moftly wanting that de- gree of velocity, in being wrought in this manner, which is eflential to good work ot this kind, they have not yet be- come in any way general. Indeed, in fome diftrifts in the fouth, the working of them by the hand not being found to fucceed well in aclual praftice, the ufual feeding rollers have been applied with the horfe-tackle, at the additional charge of about 20/., which has enabled them, it is faid, to do the work properly, and in an eafy manner, even by the power of one horfe. Where the teeth of the iron wheels in fuch machines have been found too fine for the in- creafed force made ufe of in this way, vertical wooden wheels and pinions have been put in their place, which have contributed to the ilrength and preferved the fimplicity of the machinery. Threfhing-machines have now been known, and in fome meafure employed, in the northern parts of this country for more than half a century, and are at prefent very general in thofe that are any way improved ; but in the more fouthern diftrifts, they have only been attended to, in any confider- able degree, for the fpace of the laft thirty or forty years, yet their ufe and application are faft becoming general among the more extenfive farmers whofe farms ai-e of the arable kind. In ftiort, it is not improbable but that in a little time the machine will be the moft prevalent method of threftiiiig out corn. And it has been fuggefted, that panfh machines of this nature, in centrical fituations, would per- haps not be lefs ufeful or convenient than paulli mills, while, at the fame time, they might be eafily fo regulated as to be rendered of great general benefit to the community, as well as advantageous in the way of private fpeculadon to indi- viduals. Something of this fort is faid to be already the cafe in fome diftrifts of the North, and would, it is beheved, be defirable in all, for the convenience and accommodation of the fmall farmer ; as the fame conveyance that brought the corn to be threftied, might take back the ftraw and grain, and in this way little wafte of labour or time be fuftained, while the faving would be confiderable and certain. It may be noticed alfo, that in all cafes where threftiing- machines are made ufe of, tjiey fiiould be well fuitcd to the 4 D ? estcnt T H R extent of tlic farms, and be erefted in fucli a manner as to bo convenient for having tht contents of the (lacks brought to them. In this view it has been fujjgellcd, n. the Report on Agriculture for the Welt Riding of Yorkfhire that the ban.6 to which they are attached Ihould extend into the yards in which the ftacks arc contained; as ui that way the Uour and time will be confiderably knened of fupplymg them with corn in the ilraw for being thrcfhed. And it lias been iulllv remarked, by an intelligent promoter of agricul- tural improvements, that this machine has not beqn attended with one-half of tlie .advantage which might have flowed from fo ufeful a difcovery, for want of combining the ule of it with the various connected circumilances of the larm- yard. The bufinefs of Hacking corn, for inllance, mull, it is conceived, receive an entirely new arrangement in confe- quencc of building a threlhing-mill or macliine. By means of no other additional cxpence than that of an iron railway, and placing the Hacks on frames relling on block-wheels, two feet in diameter, a very conliderable annual expence in time and labour mull, it is fuppofcd, be faved in carting Hacks to the barns, in lofs of corn, and in waiting for good weather, as well as in the faving of threfliing by flails, and all the attendant evils of pilfering and leaving corn in the ftraw. This is a material objca, which it is thought cannot receive too much attention from both landlord and tenant, It is contended that there cannot be the fmalleft doubt of the propriety or profit of having one of thefc machines fixed in the principal farm-yard. But that where the farm is large, and Hacks confequently fcattered over various fields or parts of it, then it may be right to have a moveable one alfo ; but fo many operations are wanting at home, that one Ihould certainly be fixed. The circular form of the rail- way upon which the Hacks are brought to the mill or machine, is confidered necelTary in fuch cafes, as being the onlv one which permits a choice of any particular Hack to threlh, without waiting for all or many others being done before it can be got at ; but a Hr.iight line le.iding to and pall the mill or machine is admiffible, except for this cir- cunvHance, though much inferior, in fome other points, to the circular form. In forming this plan, a fort of railway Ihould be fo contrived as that a horfe or two may be fuf- ficient to draw all common ftacks to the mill or machine. And it is dircfted that the wooden Humps on which the frame refts fliould be tinned, or laid in the common manner with brafs lattcn, which is more durable than com.mon tin, to keep out rats. Alfo, that as the power applied to the threHiing-mill in other ways is at hand, and applicable alfo to the above fort of work of drawing the Hacks, it may be uffd for the purpofe in many cafes. TliitKSiir\f;-il/i7/ Barn or Biill/lin^, that fort of barn, (lied, or other building which is calculated for receiving, or which contains this kind of mill or machine. In this intention, an upper floor, raifed eight, nine, or ten feet from the ground, in proportion to the height or fize of the animals, and the arranrement of the machinery which is to be employed, will be required, and which (hould reach from end to end of the barn or building, as a repofitory for the unthreflied corn, which fliould be there lodged and depo- fited, at leifure times, from the Hack-yard, or other places, in order to be ready to feed the mill or machine with from this upper floor. The ground-floor fliould contain the large mill-wheel, and a horfe-path round it, all the lower parts of the machinery, a drcfiing-room for the grain, and a wide open fpace for flraw of different forts, which is there to be piled up, ready for the caule-flicds, on each fide of this repoCtory of fodder. The cxpcnces of thefe prepared barns or buildings, will T H R probably not only be much leilened, but wholly done away, in fome cafes, by the ufe of the ihreihing Hack farm-yard, which has been dcfcribed in fpeaking of the mills or ma- chines for this ufe, and much convenience and accommoda- tion be thereby gained to the farmer in the difpatch of the bufinefs, &c. On the whole, by thefe means the labouring teams and hands will be enabled to perform the work of threfliing at fuch wet, ftormy, and leifure periods as will render it the leail troubleiome and expenfive to the farmer. See I'l I R Es H I N G- Machine. THRESHOLD Point, in Geography, a cape on the north-wcH coaH of New Guinea. S. lat. o° 37'. E. long. 132°. THREX, among the Romans. See Thraces. THRIFT, in Bolany. See Statice. THRIHING. SeeTRrniNG. THRIMSA, in Antiquity, a filver coin, the value of which has occafioned a variety of conjeftures. Lambard, who gave the firft eHimatc of it, makes it a three-fhilling piece, in which opinion he is followed by fir Henry Spelman. Bifliop Nicholfon apprehends, that it was the name of their common coin, and tliat the thrimfa, fceata, and penny, were all of them the fame. Somner, from the import of the word, and the value given to the thrimfa in the Saxon laws, rates it at three -pence. Selden, Brady, and Hickes, are of opinion, that this coin was either the laH tremiffis of the Franks and Germans, and confequently four-pence, or the third part of the Saxon fliilling, i. e. tliree halfpence and one -third of a halfpenny in their money. Mr. Clarke adopts, and endeavours to eftablilh the opinion of Somner, who ob- ferved, from the laws of Athelftan, that the price of a thane's life was, by the Angli, valued at 2000 thrimfas, which, by the Mercian eftimate, was 1200 fliillings ; and if each of thefe fums denotes the fame value, which is pro- bable, the thrimfa mull; be to the fliilling as 2000 is to 1200, or three p:u-ts in five of a Saxon fliilling, /. e. three-pence. The thrimla was firfl coined in the reigns before Athel- llai!, during their greater affluence in cafh, and defigned merely for the convenience of exchange, as the moft proper divifion that could be made in their money without a frac- tion, between the fliilling and the penny. But when tlie fliilling was reduced, it was of little ufe, and by degrees entirely laid afide. Dr. Hickes obferves, that the mctliod of computing by thrimfas was chiefly ufed in the more mercantile parts of this kingdom, among the Eall and WeH and South Saxons, and poflibly coined only among them ; for it appears that the inland provinces, the Mercians, reckoned generally by the fliilling. Clarke's Conn, of the Roman, Saxon, and Englifli Coins, p. 229, &c. THRIN, in Geography, a river of Norfolk, which joins the Yare at Yarmouth. THRINAX, in Botany, %i»k;, a fan, in allufion to the form of its leaves ; a name beftowed by the younger Lin- naus on the little Fan Palm of Jamaica, when he firH dif- tinguiflied this plant generically from Corypha, to which it had been referred by Browne. To that genus it is, as Swartz obferves, very clofely allied, difl^ering chiefly in the want of a corolla. — Swartz Prodr. 57. Ind. Occ. v. i. 613. t. 13.' Schreb. Gen. 772. Willd. Sp. PI. v. 2. 202. Mart. Mill. Dia. v. 4. Ait. Hort. Kew. v. 2. 307 Clafs and order, Hcxandria Monogynia. Nat. Ord. Pahii£. Gen. Ch. Cal. Perianth inferior, of one leaf, minute, hemifpherical, with fix fniall, crcft, marginal teeth. Cor. none. Stam. Fikmcr.'.s iix, erec\, equal, thread-fliapcd, about T H R T H R about twice the length of the calyx, iiifertcd at the bafe of tlie geimen ; anthers terminal, eredt, linear, longer than the filaments, cloven at each end. Pijl. Germen iialf immerA'd in the bafe of the calyx, ovate ; ftyle cylindrical, thickiih, ereft, the length of the filaments ; ftigma very large, funnel-lhaped, oblique, of a fnigle, dilated, ovate, rather tumid, lip, finely crenate at the margin, rarely accom- panied by another lip. Per'tc. Drupa fmall, globular, naked, rather dry. Seed. Nut lolitary, large, globofe, brittle, of one cell, with a folitary kernel. Eil. Ch. Calyx with fix teeth. Corolla none. Stigma fnmiel-diaped, oblique. Drupa globular, with a fmglc feed. I. Th. parvijliirii. Small Jamaica Fan Palm ; Palmetto Royal; or Palmetto Thatch. Willd. n. i. Ait. n. i. — Native of the fea-coafl, and other barren dry- fituations, in Jamaica and Hifpaniola. Swartz. The Jiem is from ten to twenty feet high, unarmed ; tumid at the bafe. Leaves collefted about the top, llalked, from one to two feet long, palmate, plaited like a fan ; their fegments lanceolate, ribbed and ftreaked, rigid, nearly equal. Fooljlalks longer than the leaves, roundjfli, fomewhat comprelfed, fmooth, flexible, unarmed. General Sheath compound. Flower-Jlalh ter- minal, folitary, nearly credl, two or three feet long, pani- cled, imbricated with partial Jliealhs, or hraBeas ; its branches alternate, lubdivided, Ipreading ; the ultimate ones oppofite or ternate, crofllng each other. Flowers ftalked, oppofite or ternate, fmall, perfeft. ^"liitherj yellow Brown fays, Hifl. of Jamaica, 191, this tree covers whole fields in many parts of that illand, thriving better on the rocky hills, than on the low moiil plains near the fea. The copious little berries ferve as food for birds and wild boafts. The trunk, feldom more than four or five inches in diameter, ten or fourteen feet high, is called the Thatch-pole, and is much tiled for piles in wharfs and other buildings made in the fea ; for it ffands the water well, and is never corroded or touched by worms. The fplit footftalks make balkets, bow-ftriiigs, I'opes, &c. being very ftrong and tough. The leaves are called thatch, and are ufed as fuch, for oiithoufes efpeciallv, being found to refill the weather for many years. Sucii coverings of buildings have only the inconvenience of har- bouring rats or other vermin, which prevents their general life. THRINCIA, fo called by Roth, from Ifiyy.o.:, the battle- ment of a zvall, to which he compares the feed-crown of the marginal florets. The Italian name Triuciatella, ufed by Camerarius, Hort. Med. 173, fov HyoJ'eris radia'a, m:xy, as Dr. Roth fuppofes, have a timilar origin ; but it comes di- reftly from the Italian verb Irhiciare, to cut, alluding to the remarkable fegments of the leaf in that plant. This genus of Tbr'inc'ui conlifto of two fpecics, Leontodon hirtuin of Linnceus, and Hyoferis taraxacohles of Villars, ex- cluding the fynonyms of the latter. We fee no occafion to fi?parate them from ylpar^ia of Schreber and Willdenow, the Hedypnots of Hudfon. Having, in the Prodr. Fl. Grxc. v. 2. 142, adopted Hedypnois ; and in p. 150 of the fame volume, Apaugia ; we refer the reader to the former in its proper place, and fliall here introduce the latter, with its full charafters and fynonyms. Apakoia, Avx^yi^i, an ancient Greek name, with whofe original meaning, or application, we are unacquainted. Dalechamp has applied it to fomething of the H'terac'ium kind ; and Schreber, after Scopoli, to the genus now before us, with which we hope it will remain Schreb. Gen. 5:7. Willd. Sp. PI. v. 3. 1547. Mart. Mill. Did. v. 4. Ait. Hort. Kew. V. 4. 445. Sm. Prodr. Fl. Grxc. SibtJi. v. 2. 1^0. Compend. Fl. Brit. cd. 2. 117. Marfch. a Bieberft. Caucaf. V. 2. 247. (Hedypnois; Hudf. Fl. Angl. 340, 7 Sm. Fl. Brit. 82;?. Leontodon; JulT. 170. Thrincia ; Roth. Catal. v. 1. 97. Willd. Sp. PI. v. 3. 1554. Ait. Hort. Kew. V. 4. 447. Virea ; Gaertn. t. 159.) — Clafs and order, S\rs, io fparinRly that they feem altogether fmoolh. SM- longer than the leaves, llriated, naked except a m.nute fcale or two ; > little tumid and downy under the calyx, which is blackilh, though hifpid with whitifh hairs. Flo-wtr of a full ye low. S^Ji fmooth to the naked eye ; their down fcflile, feathery. This plant has the habit and ilalure of /I. hifpida, n. H, but differs in die want of hairs on \iKjialk, as well as m the form and pofition of the pubefcence of the foliage. 16. A. coronopifolia. Bucks-honi-leaved Hawk-bit. Willd. n. 13. (Lcontodoii coronopifolium ; Desfont. Atlant. V. 2. 229. t. 214.)— Stalks radical, fingle-flow- ered, fcaly, Ihorter than the leaves, hairy as well as the calyx. Leaves pinnatifid, with blunt lobes, rough with forked hairs.— Native of the fandy deferts of Barbary, near Cafsa. The whole plant is rough with branched hairs. Leaves three or four inches long, fpreadiiig on the ground, unequallv, but rather regularly, pinnatifid. Stalks feveral, afteuding, an inch or two high. Flowers yellow, an inch broad. 17. A. hifpatiica. Spanifh Hawk-bit. Willd. n. 14. Marfch. a Btebertl. Caucaf. v. 2. 248. (Leoiitodon hif- pidum ; Cavan. Ic. v. 2. 39. t. 149, excluding the fy- nonym. )— Stems leafy, moftly iingle-flowered, hairy as well as the calyx. Leaves oblong-lanceolate, toothed or pinna- tifid, rough, with forked hairs. — Native of hilly fituations in Spain, flowering the beginning of May. Frequent alfo in Tauria. This, as Willdenow remarks, differs as much as poffible from /I. hifpida. The whole herb is even more roug-h or briftly than that fpecies. Stems fix inches high, furnifhed with lanceolate fcales, accompanied by fome ob- long, obtufe, entire or toothed, leaves, an inch or inch and half long. The radical leaves are more numerous and longer, tapering at the bafe, gradually dilated upward, bluntly toothed, or in fome degree pinnatifid. Floiuers terminal, foUtarv, pale yellow, nearly an inch and half broad. Calyx with numerous long, narrow, very hairy fcales. The hairs of the ftem and other parts are white, fometimes forked. iS. A. afpera. Branching Rough Hawk -bit. " Waldft. et Kitaib. Hung. v. 2. 114. t. no." Willd. n. 15. Ait. n. 8. — Stem leafy, fomewhat branched, hairy. Calyx fmooth. Leaves lanceolate, rnncinate, hairy, with forked briftlcs. — Native of rocky woods in Hungary, near the baths of Hercules. Very nearly akin to the lall, but the more branching /?fm, rnncinate leaves, and fmooth very clofe- prclTed fcales of the calyx, fringed at the edges only, not lax and hairy, appear fufficient, as Willdenow thinks, to dif- tingnilh this Ipccies. 19. A.Jlrigofa. Briftly Hawk-bit. Marfch. a Bieberft. Caucaf. V. 2. 249. (Scorzonera afperrima ; Willd. Sp. PI. V. 3. 1507. S. hifpida; Forflc. yEgypt.-Arab. 215.) — " Stem leafy, hifpid, bearing one or two flowers. Calyx hoary ; the margin and keel of its fcales fringed with briftles. Leaves lanceolate, toothed, hifpid, with forked hairs. Seeds rough." — Native of dry open places in Ibe- ria, and the eallern part of Caucaius, flowering in June. Forfl