BERKELEY LIBRARY UNIVERSITY Of CALIFORNIA ^ EARTH SCIENCES LIBRARY 33d CONGRESS, ) HOUSE OF REPRESENTATIVES. C Ex. Doc. 1st Session. \ I No. 121. THE U, S. NAVAL ASTRONOMICAL EXPEDITION THE SOUTHERN HEMISPHERE, THE YEARS 1849-'50-'51-152 Lieut. ARCHIBALD MACK.AE, ) Master S. LEDYAKD PHELPS, > Assistants. Captain's Clerk E. R. SMITH, ) VOLUME III. OBSERVATIONS TO DETERMINE THE SOLAR PARALLAX. BY LIEUT. J. M. GILLISS, LL.D. SUPERINTENDENT. WASHINGTON: A. O. P. NICHOLSON, PRINTER. MDCCCLVI. In THE SENATE OF THE USITKD STATES, August 2, 1854. Resolved, That there be printed and bound five thousand extra copies nf the Report and one thousand extra copies of the Observations of the United States Naval Astronomical Expedition to Chile: two hundred and fifty copies of the Report and one hundred copies of the Observations for the use of the Secretary of the Navy; one hundred copies of each for the Superin- tendent of the Expedition ; and the remainder for the use of the Senate. Attest: ASBUKY DICKINS Secretary. CONTENTS. ORIGIN AND OPERATIONS OF THE EXPEDITION i-xlii Dr. C. L. Gerling suggests a new mode for determining the solar parallax • iii-iv An expedition to the southern hemisphere proposed jv A brief account of the climate of Chile -- v-viii The instruments necessary for the observations --.--.-..-.. viii— ix Opinions of American astronomers .-.----.._.-.. x-xi Results which may possibly be obtained .-..'----_.._. xi-xiv Resolutions of the American Philosophical Society and Academy of Arts and Sciences - - - xiv-xv Report of the Naval Committee of the House of Representatives in favor of sending out an expedition - - xv-xvii Appropriation of funds by Congress xviii Proposed plan of operations xviii-xxii Approbation of the programme by the Societies and Department - xxii-xxiii The Meridian circle ordered from Messrs. Pistor & Martins xxiii Defective condition of the instruments supposed available - xxiv The Smithsonian Institution authorizes the purchase of a ill-inch Equatorial, to be loaned to the expedition - xxiv Telescope made by Win. J. Young and Henry Fitz satisfactorily tried -------- xxv Congress appropriates money to pay for the telescope, &c. .-..- xxvi Interest manifested in the expedition and valuable services rendered by scientific men in England - - xxvi Officers ordered as assistants, and preparation of the ephemerides ..-..-.. xxvi-xxvii Circular to the friends of astronomical science ---- xxvii-xxix Sailing of the assistants with the equipment ------ - xxix Instructions from the Secretary of the Navy - xxix Instructions from the same to Lieutenant Maury, Superintendent Naval Observatory xxx Departure from the United States and arrival in Chile xxx Favorable reception by the government at Santiago de Chile xxxi Reasons for selecting Santiago for the observations - xxxi The site chosen for the observations xxxii Arrival of the assistants and equipment ---- xxxii Erection of the observatories on Santa Lucia - ------------ xxxii The instruments mounted and work commenced ------------ xxxiii The government desires to have some of its young men instructed in practical astronomy xxxiii Interest and curiosity of the public- ...... xxxiii Progress of the observations of the planets Mars and Venus - - - - xxxiv-xxxv Extraordinarily favorable condition of the atmosphere xxxiv Visit to the northern provinces of Chile - xxxv Zone observations and star magnitudes xxxvi Variations in the brilliancy of n Argus - xxxvi-xxxvii Visit to Talca. and the river Maule xxxvii Establishment of the OnsERVATORio NACIONAI. ............ xxxviii Observations during our last year in Chile .--...-..... xxxviii-xxxix Two occultations of r; Geminorum on the same evening ----- xxxix Meridional distance between Santiago and Valparaiso ----------- xxxix Magnetical and meteorological observations - ............ xxxix— xl Transfer the observatory and take leave of the government ---------- j\ Lieut MacRae is instructed to proceed across the Andes and Argentine provinces for special observations - xl— xli Return of the expedition to the United States - xlii OBSERVATIONS OF THE PLANETS MARS AND VENUS. INTRODUCTION— Description of the observatory -..--•..' j\v Description of the Equatorial .._........-.... xiv; Observations to determine the position of the instrument xlvii Instrumental deviations ----- xlvijj Value of a revolution of the micrometer screw xlviii Diameter of the micrometer wire • xlviii (iv) CONTENTS. LATITUDE or THE OBSERVATORY ... ... xlix-1 LONGITUDE OF THE OBSERVATORY .... MODE Of OBSERVING IN DIFFERENTIAL MEASURES - EXPLANATION OF THE PRINTED EQUATORIAL OBSERVATIONS ------- Equatorial intervals of the micrometer system -- lu Description of ike Metiilian circle anil its adjustments ---. liii-liv EXPLANATION OF THE PRINTED MERIDIAN CIRCLE OBSERVATIONS liv Mean places of certain of the pre- selected stars ....-.------- • lv-]vi Mode of deducing the horizontal and vertical diameters of Mars and Venw from the differential tneasurea .... Ivi Mean apparent errors of the Nautical Almanac diameter of Mars ..--- Ivi: Mean apparent error of the Nautical Almanac vertical diameter of Venus ....-.-- Ivii Eeference of the observations to Dr. B. A. GOULD, jr ............ ^ Ivii THE SOLAR PARALLAX— § I. INTRODUCTORY AND HISTORICAL -..-..-------- Ixi § 2. GENERAL STATEMENT OF THE PROBLEM Ixviii $ 3. METHOD PURSUED -- Ixxii $ 4. EPHEMERIDES AND AUXILIARY TABLES ------------- IxXVli { 5. COMPARISON-STARS .__.-.....-- xcvii J 6. OBSERVATIONS ----... ..--- cxliv J 7. OBSERVATIONS COMPARED WITH EPHEMERIR ------------ clxxxvi $ 8. SOLAR PARALLAX FROM CORRESPONDENT OBSERVATIONS ---------- ccix $ 9. EQUATIONS OF CONDITION -...._._..----- ccxiii $ 10. WEIGHTS AND MEAN ERRORS ccxlvi $11. FUNDAMENTAL EQUATIONS -......--... cclix $ 12. PRELIMINARY SOLUTIONS ccxlix $ 13. FINAL SOLUTIONS --..__.._----_.. cclxxv $ 14. DIAMETERS cclx.xix § 15. RESULTS cclxxxiv SANTIAGO OBSERVATIONS — Micrometrical observations of Mars and pre-selected stars near the opposition of 1349-'50 1-84 Micrometrical observations of Mars and pre-selected stars near the opposition of 1851-'52 85-213 Microtnetrical observations of Venus and pre-selected stars near the inferior conjunction of ]850-'51 216-280 Micrometrical observations of Venus and pre-selected stars near the inferior conjunction of 1852 - - 281-305 Meridian circle observations of Mars and certain stars near the opposition of 1851-'52 ... - 309-318 Meridian circle observations of Venus and certain stars near the inferior conjunction of 1850-'51 - - 319-326 Meridian circle observations of Venus and certain stars near the inferior conjunction of 1852 - - - 327-332 Deduced diameters of Mars, 1849-'50, compared with the Nnutical Almanac 335-330 Deduced diameters of Mars, 1851-'52, compared with the Nautical Almanac 337-338 Deduced and measured diameters of Venus, 1850-'51, compared with the Nautical Almanac - - - 339-340 Deduced and measured diameters of Venus, 1852, compared with the Nautical Almanac - - - - 341 WASHINGTON OBSERVATIONS — Letter from Lieutenant M. F. Maury, LL.D., &c., Superintendent 345 Description of the equatorial, and explanation of the observations, by J. Ferguson, esq., ass't astronomer 345-347 Micrometrical observations of Mars and pre-selected stars near the opposition of J849-'50 351-378 Micrometrical observations of Mars and pre-selected stars near the opposition of 1851-'52 379-385 Micrometrical observations of Venus and pre-selected stars near the inferior conjunction of 1850-'51 389-405 Micrometrical observations of Venus and pre-selected stars near the inferior conjunction of 1852 406-414 CAMBRIDGE (MASS.) OBSERVATIONS — Introductory remarks, by Professor Wm. C. Bond, director of the observatory 417 Hight-ascensions of Mars (by transits) near the opposition of 1849-'50 418-447 Right-ascensions of Mars, by micrometer measurements, near the opposition of 1849-'50 .... 448-452 Declinations of Mars, by micrometer measurements, near the opposition of 1849-'50 .... 453-460 CAPE OF GOOD HOPE OBSERVATIONS — Editorial notice 463 Description of the Equatorial by Thos. Maclear, esq., her Majesty's astronomer at the Cape - - 463-465 Value of a revolution of the micrometer-screw - 466 Adjustments of the Equatorial -• 466 Particulars relating to the observations 467 Barometers r 468-469 Rate and error of the clock 470 Micrometrical observations of Mars and pre-selected stars near the opposition of 1849-'50 - - 471-492 CORRIGENDA, VOL. III. Page xxxii, line 36, /or "dips to the east," read "dips to the west." Page 1, lines 4 and 5, transpose words "gum " and "product." Page Ixii, table, line 3, for " Plimis Lib. II, cap. XXII, Ed. Siilig I, 130, [1,] " read " Plinius [1] Lib. II, cap. XXII, Ed. Siilig I, 130, [2.]" Page Ixii, table, line 15, for " facaltate" read "facilitate." Page Ixii, notes, line 2, after "GASSEKDI, Op. Omn. VI, 464," add "p. 455, Ed. 1G58." Page Ixiii, notes, line 4, for "VII p. 115" read "VIII p. 115." Page Ixiii, notes, lines 9, 11, Through the kindness of Dr. COGSWELL, of the Astor Library, I have obtained a copy of Halley's Southern Catalogue, Ed. Paris, 1679. The needed references are for the parallax, page 80, and for the citation from Streete, page 82. « Page Ixiv, notes, line 8, for "483" read "443." Page Ixiv, notes, line 8, for " Vuntensk" read " Vetenskaps. " Page Ixv, notes, line 3, for "I, p 89" read "I, p. 4." Page Ixv, notes, line 6, for " 1768, p. 55" read " 1768, p 355." Page Ixv, notes, line 7, for "I, p. 4" read "I, p. 100." Page Ixvii, text, line 14,/or " 2406J" read "24065." Page Ixxiii, text, lines 3, 11, 13, for "If and c5w" read " i? and ia." Page Ixxvi, text, lines 27, 28, for "01" read "<),'." Page cxxiv, star No. 19, column i,for " 3". 2 and 2". 70 " read " 0". 2 and 2". 20." Page cxxvi, star No. 70, column a, for "8 19 26" read "8 19 29." Page cxxxiv, star No. 43, column a, for "7 33 49" read "7 33 50." Page cxxxv, star No. 28, column 6, for "26 31 16.25" read "25 31 16.25." Page cxliv, star No. 28, line 2, column date, insert "Nov. 26." Page cclxviii, line I, for "All the terms containing n" read "All the terms containing u." Page cclxx, line 15, insert " w" after " — 5.949." Page cclxx, line 24, insert " z " after " + 20. 674." Page eclxxi, the second equation should read " y = 2". 8970," &o. Page cclxxiv, in the first line of column 1 insert " aa" within the brackets. Page cclxxx, the equation line 10 should read " t = i, + q." Page cclxxxv, line 6 from bottom, the first equation should read e = - Vf I. Page 310, No. 3, increase mean of wires and app. A. R. 0. 09. Page 310, No. 4, diminish " " 0.20. 1'age 310, No. 14, diminish " 0. 13. Page 310, No. 36, increase " • " 0.05. Page 312, No. 30, diminish " " 0.26. Page 314, No. 41, increase " " 10.00. Page 316, No. 4, diminish " " 0.05. Page 317, No. 2, increase " " 0.07. Page 318, No. 21, increase " " 0.37. Page 320, No. 6, increase " " 0.03. Piipe 320, No. 19, increase " " 0.44. I'iigu 320, No. 35, diminish " " 0.06. Page 321, No. 6, diminish " " 0.28. Page 324, No. 36, dimini.-h " " -002. Page 327, No. 31, diminish " " 0. 20. Page 331, No. 41, diminish " " 10.00. Broken transits were reduced to middle wire, and not to the mean of the wires. A corresponding collimation correction was applied to them. All other errors detected in the printed observations have been detailed by Dr Gould, pages cxlv-clxxxv. ADDITIONAL CORRIGENDA, VOL. II. Page 6," line 18, omit "and clear." Page 50, line 18, for " Putano" read "Puntano." Page 55, line 8, far "eight" read "eighteen." ADDITIONAL CORRIGENDA, VOL. VI. Introduction, page xiv — for " £ (A + V) = 11. 318420" read " log tang £ (A + V) — 11. 318*20." For " j (A — V) = 10. 216726" read " log tang £ (A — V) = 10. 216726," and dele " tang" in two places below. Page xxiv, lines three, two, and one, from bottom, should read — hemeris was prepared. As the apparent orbits crossed sev- eral portions of the heavens in which no stars had previously been observed, at my request, both Lieutenant Maury and Professor Bond, at Cambridge, Mass., caused sweeps to be made, to obtain, if possible, suitable comparing stars. These places, together with those of the planets, were plotted on charts, and lithographed copies were sent with the ephemerides to every obser- vatory. The accompanying circular was as follows: TO THE FRIENDS OF ASTRONOMICAL SCIENCE. In the year 1847 Dr. Gerling, of Marburg, suggested that a new determination of the solar parallax might be obtained by observations upon Venus at and near her stationary periods, provided these observations be made at points far removed from each other. In 1847-8 the American Philosophical Society and the Academy of Arts and Sciences recom- mended to the Secretary of the Navy that an astronomical expedition be sent to Chile, for the purpose of making, according to Dr. Sterling's plan, observations upon Venus, in connexion with the National Observatory at Washington. By an act of Congress, approved August 3, 1848, the Secretary of the Navy was directed to cause these observations to be made. Being thus authorized by the national legislature, and that nothing which is calculated to impart interest to the undertaking or to give value to its results may be omitted on the part of the American government, I am directed by the Hon. Wm. Ballard Preston, Secretary of the Navy, to announce to the friends of science the objects and plan of the Expedition, and to invite astronomers generally to lend it their co-operation by making, in so far as it may be practi- cable and convenient for them to make, a series of corresponding observations. The Expedition has been fitted out on a scale commensurate with the objects in view. All the means and facilities for it which Congress has placed at the disposal of the Executive have been afforded to it by the Secretary of the Navy. Reposing special trust and confidence in the zeal and ability of Lieut. J. M. Gilliss, U. S. N., he has appointed that officer to the charge of it ; other officers of the navy have been detailed to accompany it as assistants. Passed Mid- shipmen A. MacRae and Henry C. Hunter, who are to accompany it, have been stationed at the National Observatory for the requisite and previous training. The necessary instruments have been procured for the Expedition, and suitable buildings to serve as an observatory in Chile have been prepared in Washington. They are wooden structures, and will be taken to pieces and shipped to Valparaiso in the course of a few days. The principal instruments which the Expedition will carry with it are two telescopes equa- torially mounted, a meridian circle, a clock, and three chronometers. The larger telescope is an eight and a half feet refractor. It has an object-glass by Fitz, of New York, that affords a clear aperture of six inches and a half. It is fitted with clock-work by Wm. Young, of Philadelphia, and by him provided with a micrometer adapted both for dif- ferential measurements and for measurements of angle of position and distance. The other telescope is a five-feet achromatic, by Frauenhofer. It, also, has been equa- torially mounted and fitted with a micrometer by Young, of Philadelphia. The meridian circle is by Pistor & Martins. The object-glass of the telescope has an aper- ture (clear) of four and one third inches, with a focal length of six feet. The circles are thirty- six inches diameter, minutely divided, and. provided each with two reading microscopes. The series of astronomical observations, in which the co-operation of other observers is more especially invited, will consist of differential measurements during certain portions of the years 1849, '50, '51, and '52 upon Venus and Mars, with certain stars along their paths. The observations upon Venus which will most command the attention of the Expedition, will be differential measurements upon that planet in the morning and evening while it is near the inferior conjunctions of 1850 and 1852. xxviii ORIGIN AND OPERATIONS In like manner, Mars will be compared with its neighboring stars near the times of opposi- tion of that planet in 1849 and 1852. The object of these observations upon this planet more accurate determination of its parallax. To facilitate the observations, and to secure concert of action, so that the co-operators, in whatever part of the world, may, in observing the planets, always use the same stars of com- parison, Lieut. Gilliss has prepared the accompanying charts and tables : Charts Nos. 1 to 5, inclusive, refer to Venus ; 6 and 7 to Mars. They show the approximate places of the planets from day to day relatively to the stars down to the tenth magnitude near their paths. In some parts of the paths of the planets, along which published catalogues do not afford proper stars of comparison, special observations have been made with the large refractor of the National Observatory ; the stars whose approximate places have been thus obtained are mapped down along the planet's path. Tables 1 and 2 contain the ephemeris of the planets and stars of comparison. They give the star of comparison for each day, and quote its magnitude, with its approximate mean place only. The stars marked W. C. are from the unpublished observations of the Washington cata- logue ; as they have not undergone their final reductions, their declinations are only given to the nearest 10". The other stars are designated by the initials or name of the catalogue from which they are taken. In the ephemerides of the two planets and their neighboring stars, the mean places of the stars for 1st January of the year for which the ephemerides are calculated, are given. The object of such ephemeris is to give the place of the star with accuracy sufficient merely to leave no doubt as to the identity of the particular star which all observers are requested to use during the day thereby provided for. It is requested that those who may have the goodness to co-operate in these observations will observe the planets also, both for right ascension and declination at their meridian passage. The order of observations proposed by Lieut. Gilliss is this : During the term of the epheme- ris of Mars, differential measurements upon that planet and the star of comparison for the day will be commenced at two hours after the passage of the planet across the meridian of Green- wich, and be continued for one hour and a half after the star and planet shall have passed the meridian of Washington, observing and comparing with the star the north and south limbs of the planet alternately. Both the planet and its star of comparison will also be observed, with the meridian circle, at their transits across the meridian of the observatory in Chile. . The same course is proposed to be pursued at meridian transit with regard to Venus and her stars of comparison. Lieut. Gilliss proposes to commence the differential observations upon Venus and her star of comparison as given in the ephemeris as early in the evening and morning, and to continue them as long, as the light of the sun and the conditions of the atmosphere may admit. Owing to the absence of stars of sufficient magnitude within 15° of the sun, an omission is made in the ephemeris during the time that the planet will be within that distance of the sun. It is pro- posed during such intervals to rely exclusively on meridian observations, both at the observa- tory in Chile and elsewhere. The precise place at which the observatory is to be erected will not be decided upon until the arrival there of the Expedition. Those astronomers who are disposed to forward the objects of the Expedition so far as to co-operate with it in conducting an auxiliary series of observations, will perceive that the results of their labors will be enhanced by using, whenever practicable, the stars of comparison which Lieut. Gilliss has selected, and which are given in tables 1 and 2, and by following generally the plan of observations proposed by him, and herein explained. OP THE EXPEDITION. XXIX Each co-laborer is requested to send annually to the Superintendent of the National Observa- tory at Washington his observations, with an account of the instruments with which they were made, together with such other information in relation thereto as is necessary to a full under- standing and appreciation of them, and the results arising therefrom. M. F. MAURY, Lieut. U. 8. Navy. JTXE, 1849. In June^ the observatories and all the instruments, except the meridian circle, were shipped at Baltimore on board the "Louis Philippe," bound round Cape Horn, and the vessel being ready for sea, the assistants embarked on the llth of the following month. I hoped to reach Valpa- raiso before them, and supposing that no detention would be experienced on the more expedi- tious route across the isthmus of Panama, none of the portable instruments were reserved except an aneroid barometer and one thermometer. As it resulted, the magnetical instruments would have been an instructive and interesting source of occupation during the weary month passed in that most irksome of all cities on the globe — Panama. But I am anticipating. On the day following the departure of the assistants, the department was notified of the fact, and advised that there would be nothing to delay my departure beyond the date at which the next steamer would leave for Chagres. And three weeks later the following instructions were received : NAVY DEPARTMENT, August 6, 1849. SIR: Your letter of the 12th ultimo, informing the department that the instruments and other portions of the equipment essential to the observations to be made under the act of Con- gress approved August 3, 1848, have been shipped for Chile under charge of the assistants, and that nothing need now delay your departure, has been received. You will be pleased to embark by the earliest opportunity, and proceed to Santiago in Chile, via the isthmus of Panama, and the line of steamers from thence to Valparaiso. On your arrival, you will make known to the consul of the United States there, or other accredited agent of the United States, the object of the Expedition, and request him to make the proper repre- sentation to the Chilean government, with a view to obtain the necessary permission to occupy suitable sites for the observations. The object of the Expedition, as set forth in the act referred to, is to cause "the observations to be made which have been recently recommended (to the department) by the American Philosophical Society and the Academy of Arts and Sciences," of which you have been apprized. After obtaining the necessary permission of the Chilean government, you will select such sites as may be, in your judgment, necessary for effecting and completing the observations contemplated, and proceed without delay to accomplish the object. For the pay of yourself and party whilst in Chile, Messrs. Baring Brothers & Co., of Lon- don, have been instructed to honor your drafts. You will keep an exact account of all your receipts and expenditures of public money, taking regular vouchers for all expenditures, send- ing your accounts quarterly to the Fourth Auditor for adjustment. The unexpended balance of the appropriations amounts to $4,159 51, which will be placed in your hands, and charged to you on the books of the Treasury Department. The department entertains the fullest confidence, that in your ability, zeal and energy, the honorable duty assigned to you will redound to the advance of science, and of the honor of your country and of yourself. You will be pleased, from time to time, as opportunities offer, to inform the department of the progress made, and to furnish any other information of a useful character. Wishing you success, and the safe return of yourself and party, I am, respectfully, your obedient servant, WM. BALLARD PRESTON. Lieut. J. M. GII.I.ISS, U. S. Navy, Washington. XXX ORIGIN AND OPERATIONS As the two series of observations for parallax— the specific object which had been the origin of the Kxpedition — would be valuable only when there were corresponding observations in the two hemispheres, and the co-operation of other observatories would be matters of favor, not right, in order to insure the impartial trial of Dr. Gerling's method, under date of August 11, Lieut. Maury was instructed by the honorable Secretary, that— "As the success of the Astronomical Expedition to Chile, under the direction of Lieut. Gilliss, will greatly depend on the care with which the corresponding observations are made in the northern hemisphere, you will designate an assistant whose especial duty it shall be to make the observations at the times and in the manner specified in the ' Circular to the Friends of Science,' which you prepared under the direction of this department." At the same time authority was granted me to dispose of the equipment at the completion of our service, in such manner as would be best for the public interest, and in case of continued illness, or other disability of either of the assistants, the commanding officers of the United States ships touching at Valparaiso were authorized to give me any volunteer officer in ex- change. The duties required would be confining and trying, our probable place of abode somewhat expensive, and I was unwilling to obtain the services of any officer who would be able to reproach me for having taken him from the less arduous and more economical routine on shipboard. Every effort was made to obtain at least one additional assistant from the de- partment, viz : the number that had been recommended by the societies. There were two young officers who were earnestly desirous to accompany us, one of whom, when the honorable Secretary objected on account of the small remainder of the appropriation, volunteered to bear his own travelling expenses, but the Secretary was inexorable. The first steamer to leave was the " Empire City," at New York, advertised for 16th of Au- gust. It was to be her second voyage, and the agents assured me that she would make the run to Chagres in eight or eight and a half days. Had this been accomplished, there would have been ample time to cross the isthmus by noon of the 27th ; but we were eleven and a third days in making the voyage, and in consequence, the steamer for the south Pacific had left Panama before we anchored at Chagres. Nevertheless, supposing that repairs or other casualty might have caused her detention, no time was lost in landing, and by midnight I was ascending the river Chagres in a canoe urged by four athletic natives. A delay of six hours, caused by a flood in the stream, prevented our reaching the city until forty-eight hours after leaving the " Empire City," when it was learned that speed had been of no avail ; the British mail steamer had departed at her appointed time, and there was before me the certainty of passing the en- suing month on the isthmus. How the time was passed, has been narrated in Vol. 1. Nor need I repeat here more than the fact, that the southern terminus of my sea voyage, Valpa- raiso, was reached on the 25th of October. At that time the steamers of this line left each extremity only once per month ; and as they landed passengers, mails, and freight at thirteen ports within the 3,100 miles of navigation, and delayed at one of them, Callao, no less than five days, the voyage occupied four weeks. By omitting the two ports in Ecuador— Buenaven- tura and Guyaquil— and Huanchaco and Casma, in Peru, and remaining only three days at Callao, it is now reduced to eighteen days. But if custom-house officials would grant necessary facilities, and not detain vessels all night when they chance to arrive after sunset, the new steamers would easily make the voyage in fifteen days. There is now a semi-monthly line ; and so pacific are the winds and waves of that broad ocean, that the arrival of a steamer from a coasting voyage of a thousand miles may be calculated quite surely within a few hours. Beaching Valparaiso bay late in the afternoon, a glance satisfied me that the "Louis Philippe" was not among the shipping in the port. Nor had the consignees any intelligence of her ; but us sho might be expected to arrive at any hour, no time was to be lost in preparatory measures \\ Inlst the consul, our highest representative functionary in the country at that time was pre- paring for me a letter to the Minister for Foreign Affairs, all necessary information was obtained of the climate on the coast, and soon after night-fall I was en route for the capital Besides OF THE EXPEDITION. XXXI the orders from the Navy Department, I had brought a despatch to the former gentleman from the honorable Secretary of State, who also made known the objects of the Expedition ; and in consequence, the consul placed me in direct intercourse with his excellency the Minister, as the most expeditious mode of perfecting the necessary arrangements. By travelling all night, I was at Santiago near noon of the next day. On presenting my letters, the government received me cordially, and acted promptly and with commendable lib- erality on every point, by offers to place at my control any unoccupied public ground, to admit free of customs dues everything belonging to the officers of the Expedition, as well as its equip- ment, and to promote or facilitate its objects in every other manner which might be indicated. Indeed, the good will and liberality of the President and his Cabinet then, and throughout our stay in the country, were uniformly manifested. As one evidence of their desire to serve us, the ^Minister of War offered to station a guard at the observatory to protect the instruments from malicious injury, and ourselves from possible annoyance, requesting that notice might be sent tn him as soon as the instruments were conveyed to the buildings. Unwilling to incur so great an obligation when there was no apparent necessity for it, the offer continued tacitly declined. Message after message came from the Colonel of Artillery, notifying me that he had orders to send a guard, and he awaited expression of our wishes — until, finding no reply was obtainable, but — " I will advise you when it becomes necessary," he sent a corporal with instructions to re- port to me. To have ordered the subordinate and his men back to the cuartel would have been a rude return for an act of evident kindness, and, consequently, a sentinel stood beside the obser- vatory door summer and winter. As a patron of science, in stability of government and stead- ily progressive prosperity, Chile is far in advance of every other nation of South America. A very brief investigation sufficed to satisfy me that no other part of the country would answer our purposes so well. In arriving at this conclusion, three conditions were weighed : 1st. Resources in case of accidental injury to instruments. 2d. Increased value of observations from the most southern station possible ; and 3d. The atmosphere which would permit the greatest number of observations. The first was paramount, and as persons capable of making repairs could be found only at Santiago and Valparaiso, the advantage of a station nearer to the pole was thrown oxit of the question. Nor did decision between these two places require longer examination. Apart from the fact that the former city better satisfies the second condition, the climate of the coast is subject to frequent fogs and mists, from which the great plain is almost wholly exempt. Santiago, therefore, was chosen, much, I believe, to the gratification of the government. This city, with a population of 90,000 souls, is situated on an elevated plain or basin, between ranges of mountains, in south latitude 33° 26' 25". 9; approximate longitude west of Greenwich, 4/i. 42m. 33. 6s. The plain, or, more properly speaking, the succession of basins, on one of which it stands, commences about latitude 33° south, and with slight interruption, near the par- allel of 34|°, extends to the Gulf of Ancud, in latitude 41^°. It varies in breadth from twelve to forty miles, and has a constant and quite uniform declivity from north to south. At San- tiago the height is 1,830 feet above the sea; opposite Chiloe the plain slopes to the ocean level. The base of the nearest longitudinal range of the Andes is nine miles distant from the capital; that of tlic cordilleras to the west, not less than sixteen miles — the former attaining a height of 9,000, and the latter about 3,000 feet above the plain. One spur to the northeast, which is nearly 1,000 feet high, approaches the very skirts of the city ; portions of the great Andine chain, less than thirty miles distant in an air-line, rise to 18,000 and 20, 000 feet; and Tupun- gato to the east, and Aconcagua to the N.N.E., the loftiest known summits of America, are each more than 22,000 feet above the sea. Interrupting the eastern horizon, as does this giant cordilleru, its interference with observations on the planet Venus in the morning twilight ren- dered so near an approach to it objectionable; but there was no locality in the vicinity of a proper residence free from the same obstacle, and no town in the interior that offered the facili- ties possessed by the capital. ORIGIN AND OPERATIONS Three localities there from which to select were offered me by government, viz : a part of the plain just without the southern suburbs ; Cerro Blanco, a granitic knoll some 400 feet high, within the northern boundary ; and Santa Lucia, a small mass of porphyry, in the eastern quarter of the city. The first is half submerged during the rainy season, and consequently, at such times, is almost inaccessible by pedestrians. It was without suitable accommodations near enough for our party. The second also would have rendered the erection of a dwelling indispensable. Above the castles that occupy artificial terraces halfway up its northern and southern slopes, Santa Lucia was but a pile of rugged rocks. But as government proposed to construct a suit- able path to the vicinity of the summit, to level as much space there as might be required, and to furnish a room in the castle, should it be needed, serious obstacles to its selection were re- moved, and their liberal propositions respecting it were accepted. It was not until months afterwards, and when too late — when the noises and dust of the streets became serious annoy- ances— that it was ascertained how much better positions there are in Yungai — the western suburb. But, even then, one fact reconciled me to Santa Lucia. There, when bad weather pre- vented observations, as the assistants were surrounded by the best society, interludes of social visiting probably prevented the discontent which would have generated under arduous work in the isolation of Yungai. On the very day that every preliminary had been finally arranged with the government, information came that the "Louis Philippe" had safely arrived at Valparaiso. Eepairing there at once, within three days the observatories and instruments, packed in and on six of the huge ox-carts of the country, were on their way to Santiago. The distance from Valparaiso by the road is eighty-four miles ; and as there are two ranges of mountains to cross, a journey in the summer ordinarily occupies loaded carts five days ; so that it was the 9th of November when our train halted at the foot of Santa Lucia. The chronometers, barometers, and other delicate in- struments, were packed on springs before leaving the United States, but, for greater security, they were suspended from the roof of one cart, with controlling cords at the bottom of each box, to prevent too great lateral motion. Having witnessed their departure, under charge of a care- ful capataz,* for the purpose of estimating the probable security of this mode of conveyance, by inspection of the train on the road, Lieut. MacRae and myself remained a day behind, and we were the last to proceed to the scene of our future labors. Santa Lucia is a solid mass of rock. Its horizontal projection is an oval, some 1,300 feet long from N.N.E. to S.S.W., and 500 feet in its greatest transverse diameter. Its highest pinnacles, 200 feet above the city, as well as many others, are columnar, and, at a little distance, closely resemble basalt. Some of them are vertical — a few are horizontal ; most of them, as do also its strata, stand at every inclination towards the west, but not one of them dips to the east. The slope is tolerably regular from the summit to the north and south extremes, though that of the southern portion is the most abrupt and broken. Partially covered with decomposed rock and scanty vegetable mould, its eastern face has an inclination not differing greatly from 45°. The western is precipitous — a bare wall of nearly black porphyry, with occasional injected veins of quartz. This side forms the great quarry from which the city is supplied. On its northern ridge, houses have been built as far up as the base of a castle, to which a tolerably good wind- ing road has been formed on artificial terraces cut in the eastern slope ; but above the castle, that is, for two thirds of the whole height, the rocks rise vertically for nearly twenty feet, and further ascent towards the summit was (then) only to be accomplished by clambering from point to point. The most appropriate places we could obtain were just below the summit, on the same ridge, and a large number of men were at once set to work to level them. This was no inconsiderable undertaking. Surrounded, as is the hill, by many of the best dwellings of the capital, blasting is prohibited, and the process of breaking down rocks by heating and pouring water on their hot surfaces is a very slow one. The intervention of feast days, when labor is " The person in charge of a train of carts, mules, or the vehicle in which one travels, is so called. OP THE EXPEDITION. XXX111 prohibited by the church, proved another source of delay ; and it was not until December 5 that the first building was ready for its instrument. The terrace on which this stood is eight feet higher than that of the rectangular edifice for the meridian circle, and 175 feet above the run- ning stream at the base of the hill. It commands an unobstructed view, except between S.S.W. and S.S.E., where rocky escarpments interfere for about 15° above the horizon. On the following night the equatorial was mounted, and four days later, work was com- menced with it on the planet Mars. During that season the weather was exceedingly favora- ble for observations. Of the fifty-two pre-appointed nights remaining of the series, there were only four when no observations could be made, and two others when a slight haze obscured the very minute comparing star in the illuminated telescope. Such continuous loss of rest, added to change from the moist climate of the ocean to the excessively dry one of Santiago, was so rapidly breaking down Lieut. MacEae, that, on the 18th December, I was glad to take advan- tage of the arrival of the meridian circle, and send him to Valparaiso to supervise its landing and packing for transportation. After the equatorial was mounted, three or four weeks were consumed in putting together the other building — a time quite as long as was occupied in its original construction. Mean- while we had obtained permanent quarters in the vicinity ; the circle and clock piers were put up, and our magnetical and meteorological observations had been systematically commenced. Early in February the circle was ready for use ; the first series on Mars had terminated, and zone observations were instituted, commencing at 85° south declination, and working towards the zenith on successive nights in belts 24' wide, until compelled to return below again to con- nect in right ascension. Each night's work comprised observations of level, nadir point, col- limation by reflection of the wires from mercury and standard stars before and after a zone extending through three to four hours in right ascension, so that we were always occupied from five to six, and sometimes more hours. Lieut. MacRae and myself devoted alternate nights to these observations, very rarely having relief by clouds until after April 21st. Indeed, between February 4th and that date — seventy-six nights — there were only four of them obscure. The rains of latter autumn and winter came none too soon for us. Appreciating the advantages that mental culture gives to every individual, community, or nation, the government was early in manifesting a disposition to have its citizens profit by our residence among them. The minister at Washington had inquired whether it would be agree- able to facilitate the studies of some of their most advanced young men, and very shortly after the instruments were erected the application was renewed through the University. Earnestly hoping to increase the interest in our pursuits, the proposition was cordially assented to, and three gentlemen were appointed by the Minister of Public Instruction, who were paid a mod- erate income whilst devoting certain hours to the study of theoretical and practical astronomy. One was a professor of mathematics in the National Institute ; the others prominent students of his class. Our books were at once placed at their disposal; explanations were given them at all times ; opportunities afforded them to become familiar with the meridian circle, and the smaller equatorial was loaned for their exclusive use. This instrument was mounted by them under a movable building within the castle yard, to which they had access without interfering with our regular work. These gentlemen readily aided us in the magnetical and meteorological obser- vations, and also on the term-days, or whenever sickness diminished the small number of our active party. For assistance at such times they merited our best thanks. Nor was it the gov- ernment only who were interested that astronomical knowledge should be cultivated in Chile. When the equatorial was first mounted, night after night, scores of persons ascended the hill to see the wonderful "maquina," as they called the beautifully equipoised but apparently complex instrument; and as the observations on Mars did not commence until an hour or two after dark, the intermediate time was devoted to showing them some of the wonders of the heavens. All who came were admitted — men, women, and children, rich and poor; even the sentinel who stood with sabre beside the door was not slighted ; and each in turn went away gratified, the ORIGIN AND OPERATIONS poor deferentially waiting until their more fortunate countrymen gave place within the build- ing. Few at a time could enter; and irksome as it was to repeat the same explanations to half a dozen or more parties every evening during nearly three mouths, we cheerfully persevered, and perhaps with good effect. We had been told by acquaintances that the lower classes living on and near the base of the hill were men of vicious propensities, whom it would be hazardous to meet unarmed at a late hour of the night ; but, to their credit be it said, we were never molested, even by a word, in the nearly three years during which we went up to and left the observatory at all hours. May not our civility, when they came desiring to see the telescope and the curious objects it displayed, have secured their good will ? But the custom of opening the observatory to visitors gave rise to a report that we had come to Chile as expounders of astronomy. Our arrival and purposes had been duly published ; but in a country where there are so few journals and so limited a circle of readers our position was not readily comprehended. Without exception, the foreigners who had previously settled among them came to accumulate, not to spend money, and the mass reasonably supposed we had a like object. Perhaps this con- tributed to make credible among large numbers that an astronomical class was to be formed, admission to which was earnestly sought by many of our evening visiters. Passed Midshipman Hunter, injured by being thrown from a horse early in January, returned to the United States by the first public vessel, and in September following the vacancy was filled by Mr. S. L. Phelps, who took my place at the circle. All the subsequent zone observa- tions were made by Lieut. MacRae and himself. In January, 1851, an accident to the micro- meter-screw that moves its horizontal system of wires, made it necessary for the assistants to work jointly at the zones, and, as it was manifestly impossible for them to be up every night, as soon as the first series on Venus terminated, I devoted the alternate nights with the circle to examination of such of Lacaille's stars between our zenith and pole as had never been twice observed. Messrs. Pistor & Martins, however, sent us new screws with the least possible delay, and at the close of June we could work as before.* Most of the several hundred errors which were detected in these months of examination, and subsequently, have already been announced in the pages of the "Astronomical Journal" and the "Monthly Notices of the Royal Astronomical Society." From June to October, in which last month the series on Venus commenced, the weather proved more unfavorable for observations than in any year since that of 1827 — so said intelli- gent citizens — and there were only one third of the nights suitable for zone work ; but we were able to observe the moon and stars selected from published catalogues, quite one half the time. Between October 19 and February 10, 1851, differential measures of the planet and comparing star were made on fifty-one nights ; and there were seventy-three meridian observations, at which time its diameter also was measured, and the absolute places of several standard stars observed, one or more of which occupied nearly the same parallel of declination. Owing to its very frequent tremulous or pulsatory motion in the evening twilight, the differential measures when approaching its eastern stationary terms were often found difficult, and rarely afforded much satisfaction. As example to the contrary, however, the following remarks on one evening may be quoted to show that reliable measures are not impossible : ^ November 14. An extremely fine evening throughout. Both objects are defined with pre- cision and move steadily. Except those marked 'tremulous' (1) and 'blurred,' (3) it would not have been possible for me to make better measures with so little difference between the times of transit, and so large an angle through which to move the micrometer screw." There were twenty-seven measurements made between 227t. 58m, and 0/t. 18m. sidereal time, the difference of right ascension at the first being 50s., and at the last 44.4s., and of declination at corresponding periods V 50" and 2' 12". But in the morning twilight the atmosphere was * Again tl.oso distinguished artists merited earnest commendation, as well for the promptitude with which they delivered these dehcate portions of the instrument to be forwarded to us by mail, as for their disinterestedness ia declining to make any charge therefor. OF THE EXPEDITION. XXXV • tranquil, and generally so clear that measures could he continued long after daylight if the comparing star was so hright as seventh magnitude. Once I commenced when the planet was not more than 3° above the horizon, and, as has heen stated in Vol. 1, there were several occasions when the cusps could be distinguished by the unassisted eye ! Its twinkling some mornings was also quite notable ; both the latter being facts in physical astronomy, or rather atmo- N/Jieric astronomy, never yet witnessed from any observatory in the northern hemisphere known to me. But, favorably as the planet could be seen, and carefully as colored portions were looked for on several occasions, nothing like a spot was ever detected. The meridian observations were prosecuted except whilst the planet was within 5° of the sun, a screen of white cotton cloth completely protecting the circle from the sun's rays. When the circle was again in thorough working order, I made a visit to the northern pro- vinces, taking along the magnctical instruments, and determining the elements at five stations, one of them 3,700 feet above the level of the sea. This journey also afforded opportunity to collect many facts respecting the mineral resources and distribution of mines in those provinces, as well as other interesting information not generally known out of Chile. During the month and a half of my absence from Santiago, there was very little work done by the assistants. Clouds had been even more frequent than in the corresponding period of the preceding year, though rains had neither occurred so often nor continued so long. Autumn proved almost as unfavorable for the zones ; so that from the commencement of summer to the close of this season, we averaged, for the catalogue, only a little more than 800 stars per month. July of 1851 was, undoubtedly, the most unpropitious month of our residence in Chile. During the second series on Mars, comprising 93 days, between 16th December, 1851, and 15th March, 1852, I was more fortunate. About 2,000 differential measures were made on seventy-eight, and meridian observations on eighty nights, it having occurred on two occasions that the comparing star could not be seen through the haze hanging over the valley. Generally the atmosphere was so clear that the shades of color of portions of the planet could be perceived with great distinctness and satisfaction, even iinder quite bright illumination of the field. The following notes appended to the observations of February 26, will show some- thing of the appreciation in which such nights are held. On that night the star of comparison was double; its companion, blue and of the twelfth magnitude, was some 19" south and 6" east. " Neither finer night, better images, nor more satisfactory work, since the commencement of the series. The atmosphere is as steady as the earth itself, and so translucent, that not only is the companion seen distinctly under full illumination, but even its blue color is perceptible." There were twenty-four measures on that evening, and I am quite sure the place of the planet will be given by them to within less than half a second of arc. In marked contrast are these notes to the observations on the evening of the 1st February. K There were two sharp earthquakes, at an interval of 12s., about Gh. 12m. p. M., (nearly twelve hours before,) whose effect seems to have been to change the condition of the atmosphere. At one instant the planet and star are steady, but before half-way across the field are blurred and jumping in a most extraordinary manner. Therefore, the measures could not have been very good, even had there not been the additional difficulty of endeavoring to keep Mars on the fixed wire by means of the tangent screw, whilst the micrometer wire was moved to bisect the star. Thus, only one reading of the micrometer is given, the star being that number of revolutions to the north of the planet's limb." Unfavorable as this appears to be, if we divide the thirty observations into four groups for comparison, the change of declination between the mean of the times for the two groups of the north limb differs from the change shown by the south 0".234. Should other observatories nave been equally fortunate, a discussion of the observations cannot fail to be of high interest, for it will probably forever decide the possibility of determining accurately the parallax of Mars from meridian or differential measurements. At the close of the scries, at least three meridian XXXVI ORIGIN AND OPERATIONS observations were made'of tliose in our own, as well as of the comparing stars, in the ephemeiis of the Nautical Almanac. During all these fine nights the assistants were making up lost time with the circle, extend- ing their nightly zones to the limit their vision would hear, and adding an average of more than a thousand stars to the catalogue each month. A part of their work at this period was in the 5° immediately surrounding the pole, which was observed in one belt, the slow motion of the stars permitting the circle to be moved through that space without the risk of losing any object. In order to insure this also, the same zone was observed on three successive nights, and after comparison of the several results, every star not recorded on each occasion was specially looked for. The circle was read for every star in the polar belts. One of the 9th magnitude was found which performed its entire revolution within the field of the telescope ! When double, the differences of right ascension and declination, and the magnitudes and colors of the components, were noted. There were quite a number of these last which escaped the sweeps of that eminent observer, Sir John Herschel. That our estimations of magnitudes might be comparable, Lieut. MacKae and myself had early referred to small and well-known stars of the British Association catalogue as standards, ascending or descending in the scale of brightness to the extreme magnitudes embraced in it. In like manner, the judgment of Mr. Phelps was based on Mr. MacRae's estimates. The smallest star visible in the telescope of the meridian circle, illuminated for ordinary work, and on good nights, was set down as 12th magnitude. Many of Lacaille's must have varied greatly since the date of his work, and not a few of them may probably have short periods. How many of the sixty, not perceptible by us when sought for, may only have been in the wane, remains for the decision of later astronomers. No doubt a part of these discrepancies may be due to erroneous entries in his observation books, and others to errors since made in the reduction of his work ; but as the case now stands, we have ample data to show that the places of the stars contained in the catalogue (Lacaille's) published under the direction of the British Association are extraordinarily inaccurate. That many of the stars south of the zenith of San- tiago are variable, is established by the fact that our observations embrace quite bright stars not contained in his zones ; and one or two of those not visible when twice sought in the early months of the work, were subsequently observed near their proper places. But the variable star of the southern hemisphere which has most interest is i Argus. Taking into account the surrounding nebula, the contiguous clusters of stars, its color, and changes of brilliancy, there is probably no sidereal object more wonderful. From 1884 to 1838, during which Sir John was at the Cape, it never exceeded « Centauri in brightness, and at one time was "a good match with Fomalhaut." In 1677, Halley had rated it as low as a 4th magnitude; in 1751, Lacaille saw it a 2d ; from 1811 to 1815, it had been considered a 4th again ; and subsequently, and up to 1845, it had varied between a not very remarkable 1st and a small 2d. At the last named epoch it exceeded the lustre of Canopus, than which Sirius is the only star more bril- liant in all the heavens. The following records are extracted from our note-books : 1850, February 9. A bright, clear night, and steady atmosphere. Comparing the brightest visible stars, they rank— Sirius, Canopus, >, Argus, « Centauri. The yellowish-red light of i Argus is more marked than that of Mars. February 13. * Argus apparently less bright than « Centauri. March 31. , Argus is quite as bright as the two stars of * Centauri, and superior to all except Sirius and Canopus. April 15. i Argus approaches the brilliancy of Canopus.* April 18. Night cloudless, and without haze. After the observations, careful estimation placed * Argus quite equal with, if not superior in brightness to « Centauri. They were equi- distant from the meridian. • Letter to Hon. F. P. Stanton. OP THE EXPEDITION. XXXV11 May 14. » Argus and * Centauri being at the same distance from the meridian, the former is considerably the brighter. May 16. i Argus more brilliant than the two stars of « Centauri combined. May 28. t Argus goes on increasing steadily. With the ruddiness of Aldebaran, its magni- tude is only less than Canopus.* Its change since the close of October has been nearly, if not full half a magnitude. June 3. To the unassisted eye the atmosphere is remarkably clear, the "coal sacks" of the via lactea being of startling blackness, i Argus and Arcturus have, approximately, the same color, and though the latter is rather ruddier, the former is considerably the brighter. When compared, they had about the same altitude. July 5. i Argus is still as bright as the two stars of * Centauri. July 25. i Argus as bright or brighter than the two of « Centauri. July 28. i Argus is on the wane, and is now very little superior to « Centauri. f 1851, May 18. i Argus certainly not so bright as * Centauri. December 28. i Argus quite as bright as * Centauri. 1852, January 22. i Argus no brighter than * Centauri. May 10. i Argus continued fully as bright as the double star * Centauri as late as the 15th of March last. Some nights I would estimate it a shade brighter ; but when the two were at equal distances from the meridian, it was often impossible to detect any difference with the eye. Since then it has sensibly diminished. It comes nearer to my recollection of Capella, as seen in the northern hemisphere, than any other star.J These are all the memoranda recorded, and they fully sustain the impression of Herschel, of a fitfully variable star, to an astonishing extent, with neither settled period nor regularity of progression for its minor fluctuations. The more important gradations of lustre, as those no- ticed only by Halley in 167T, and Mr. Burchell in 1811-15, occur but after long intervals. Since 1822, there have been annual watchers of its changes, and none have seen it smaller than a 2d magnitude star. That the astronomer of the northern hemisphere may appreciate the lustre of the binary system, (« Centauri), with which I so constantly compared it, a1 Centauri neither exceeds •/, nor falls below p*. Leonis, which is the more obscure of the two ; *2 is, as nearly as pos- sible, equal with Antares or Spica, with the decided orange tinge of the former, rather than the silvery radiance of the latter. Lieut. MacRae, on one occasion, estimated them at 4th and 2d magnitudes respectively, whilst I put them up as high as 1 and 1.2, which is certainly nearer the fact, though neither of us ever considered <*2 so bright as /?. As their distance never ex- ceeded 12£"§ during our stay in Chile, the unassisted eye did not separate them, and their combined light is, perhaps, one third greater than that of Arcturus. Our time in Chile was rapidly drawing to a close. Before leaving it, I was desirous to learn something more of its people, topography, and agriculture ; and as it was necessary to save my eyes for the series of observations on Venus, to commence about the close of May, I left- Santi- ago for Talca, soon after terminating the observations on Mars. Almost incessant work during nearly a hundred successive nights, in a climate so dry as to open the joints of wood that had been baked in an oven at home, had left me quite destitute of energy — very Chilean in apathy. Provided by considerate friends against most of the discomforts of the road, and instructed by them in all useful matters, the month passed on horseback proved an effectual restorative. Within that time, I visited the third city of the republic in population ; the battle-field of Lon- comilla ; descended the Maule in a boat as far as Constitucion on the sea, and re-ascended it to within fifteen miles of Talca; had an opportunity to see the principal towns in the most produc- tive agricultural provinces, and entered the Andes along the banks of the Cachapual, as far as * Letter to Lieut. C. II. Davis, U. S. N. t Letter to Hear Admiral Win. H. Smyth, R. N. t Letter to Dr. C. L. Gerling. $ At rnea» epochs, June 15, 1850, and 1852, the differences in right ascension were 11".77 and 1 l".5fi, and of declination 3".25 and 1".:!3; the former derived from twenty-four, and the latter from eight observations. A.\ . Xl'iil ORIGIN AND OPERATIONS the mineral baths of Cauquenes. As, of necessity, the journey was to be very hurried, much accurate geographical knowledge was not to be expected, and no other instruments were taken along than a Bunten's barometer and one thermometer. But the excursion brought me in con- tact with gentlemen who had visited the sources of several rivers, when crossing different mountain chains, and their information has been used in compiling the maps of Vol. 1. Very soon after my return, the government decided to establish a National Observatory, and official information of the fact was communicated by Prof. Domeyko, who had earnestly inter- ested himself to this end, and who was requested to ascertain whether our equipment could be purchased. In such case he was authorized to make the necessary arrangements for the trans- fer at the termination of our work. This was most gratifying information, a happy result to one of the cherished objects of the Expedition, and congratulations were tendered the Professor, that his adopted country offered this new evidence of its intention to continue, as it always had been, the most liberal patron of science and arts among the southern republics. Having been invested by the honorable Secretary of the Navy with power to dispose of our outfit, the instru- ments and few books belonging to the United States were offered at the prices paid for them without after-costs for transportation. Piers, &c., and the observatory building — the latter presumed to have deteriorated, and therefore not so valuable as when new — it was proposed to have appraised by two competent mechanics. Had it been optional with me, these last would have been freely offered to the government as a slight return for the many services so cheerfully extended us, and the propriety of doing so was immediately submitted to the department. Un- fortunately, the letter from the Hon. William A. Graham, then Secretary of the Navy, promptly acceding to the suggestion, did not reach me until the purchase had been effected, and I could take the responsibility to present only the necessary objects and furniture for carrying on the duties of the observatories, which had been obtained in Chile. When the basis of the negotia- tion was settled, Dr. Charles Moesta, a graduate of the University of Marburg, was appointed director of the new establishment, and immediately applied himself to acquire practical knowl- edge of the instruments. He already had acquaintance with portable astronomical and mag- netical instruments before leaving Germany, and for more than a year preceding this appoint- ment, had filled the post of assistant to the chief of the Topographical Survey in Chile ; so that two months' practice, at the hours we were not using the circle or equatorial, enabled him to become expert in their manipulation. Two of the gentlemen previously mentioned as ap- pointed government students were named as assistants very shortly after our departure, and more than one proof has since been given that the administration cherishes a desire to promote the interests of astronomy. The expedition which the President sent to Peru to observe the total eclipse of November 30, 1853, and the purchase of one of Kessel's best clocks, furnished with the most improved self-winding telegraphic register, may be cited as two such evidences. The experience obtained in the first series — summer as it was with us — had led me to expect very little from the last one on Venus. Then the planet was far south, the air was dry, and we had few clouds to contend with: now, every condition was reversed, and in the whole pre-ar- ranged period it was possible to make differential measures only on nine evenings prior to the conjunction, and on eighteen mornings subsequent to it. There was not one occasion when the measures were wholly satisfactory. The nearest approaches to it were in the evening twilight of June 23, when the record shows: "Sharp, clean images throughout ; if the star would have permitted a little more light, I should have put down all the measures as satisfactory." And on the morning of August 12th : "Good morning; images not very sharp at first, but quite satisfactory during the last observations by daylight." I could find no star in the place of H. C. 15551, R. A. T/t. 50m. 58s. Declination -f 23° 19' 13", and therefore made measures with the nearest one which was approximatively of the magnitude assigned by Lalande to No. 15551. Of 47 meridian observations, some of them were very good, or at least they were so regarded when made. More than the usual amount of work was accomplished by the assistants during fliese three OP THE EXPEDITION. XXXIX months. The winter of 1850 had convinced me that with so small a corps it would be impossi- ble to sweep all the space between our zenith and pole, and I had limited the upper zone at declination — 65° 50'. As soon as the map was filled, showing that all the space south of that parallel had been once swept, they employed the remaining nights in re-observing doubtful spaces when individual measurements or magnitudes were marked for such revision — each of them not unfrequently making a series on the same night. Winter as it was, on 57 nights, between May 29th and September 9th, above 5,000 stars were observed, clouds obscuring those remaining of the preconcerted term. Too much praise cannot be given these gentlemen for the capability, zeal, and assiduity manifested in the laborious duties undertaken. Trials of patience and hours of physical discomfort were inevitable concomitants of zone work with our circle, yet there was no abbreviation of tasks partially self-imposed, and I boldly assert that few have ever persevered more cheerfully under the continuous employment which unfavorable weather forced on some months of our stay in Chile. The observations for longitude, though not very numerous, probably give a very near approxi- mation to the truth. There was no leisure to compute anticipated occupations for ourselves, and the Nautical Almanac tables were not reliable. Moreover, neither the zone work nor the differentials with Mars and Venus could be interrupted for the observation of occultations or moon-culminations. When the latter were not interfered with, every star predicted in the almanac as liable to occultation was looked for at the proper time ; but there was more than one occasion when no occultation occurred, although the ephemeris made it nearly central in that parallel, and thus the list embraces only forty-four occultations — one hundred and seven- teen moon-culminations. On the 5th of January, 1852, there was witnessed the very rare occur- rence of a double occultation of t Geminorum. There are several lofty mountains with deep intervening valleys on the southern hemisphere of the moon. These become very conspicuous when the moon is far north, and in our note-books it was essential to record whether the zenith distance of the summits or that of the circular line of the disc was observed. On this occa- sion,, i Geminorum remained 2m. 36.4s. behind the first mountain, was 36.9s. traversing the valley between ^t and the proximate peak, and finally emerged 4m. 05.8s. after the first dis- appearance. The first contact of the moon's limb with the sun at the solar eclipse June 17, 1852, was hid- den from us by clouds ; but as the differences of their diameters were measured at transit over the meridian, and the end of the phenomenon was observed, these will add to the reliable data bearing on the determination of our longitude. The meridional distance between the observatory on Santa Lucia and that of Mr. Mcuatt, in Valparaiso, was ascertained by exchanging telegraphic signals, for which purpose the operators kindly placed the line at my disposal a few nights before I finally embarked from Valparaiso. Every precaution was taken by Lieut. MacEae at Santiago, and myself at Valparaiso, to insure an accurate result, and the mean of 100 signals — 50 each way — showed the difference of longi- tude to be ?>m. 56.51s., with a probable error of i 0.021s. For the reason respecting occultations and moon-culminations given in the preceding para- graph, meridian planetary observations, except of Mars and Venus, are also few in number. Neptune, the planet to whose orbit our late able countryman Prof. S. C. Walker had devoted so much labor with such distinguished success, was followed at opposition whenever the zones would permit ; but this was the only one. A complete set of portable magnetical instruments was made under the direction of Colonel Sabine, K. A., by Jones and Barrow, of London. This embraced a declinometer, a unifilar magnetometer, with a separate vibration apparatus and a dip-circle, with reading microscopes, all which instruments are described in a volume by Captain Riddle, R. A., published by authority of the Lords Commissioners of the Admiralty, and are noticed more at length in the appropriate volume (Vol. fi) of our work. Finding that the rock of Santa Lucia strongly influ- enced the magnets, as the iron bars of our windows wen1 too near for absolute determinations x] ORIGIN AND OPERATIONS on our own premises, the proprietor of an extensive garden in the immediate vicinity very kindly permitted its use. On the 1st, llth, and term-days of each month, observations were made there for the total horizontal force ; the inclination was observed on the first two days, and the declination on that last named. When cither the 1st or llth fell on Sunday, the ob- servations Avere made on the following day. On the term-day the changes of the declination also were noted at short intervals, extending through 24 hours. These last observations were under charge of Mr. Smith, who was occasionally aided by the Chilean students of astronomy. Those for absolute elements during the first year were made by Lieut. MacRae and myself; subsequently, the declinometer and dip circle were given up to Mr. Phelps. The meteorological instruments comprise a barometer of Hassler's construction, having an internal diameter of six tenths of an inch ; standard thermometers by Troughton & Simms and Jones ; self- register thermometers by the former artists, and a psychrometer by Bunten. The Eeaumur scale of the last is divided on paper, and enclosed in a glass cylinder surrounding the- tube, to which its lower extremity is joined by fusion. By the capillary action of a linen cord, one of the bulbs was constantly supplied with water from a bird-glass. Some time after the observations commenced, a spirit-register thermometer, divided on the tube to single de- grees, was converted into a minimum wet-bulb, to which moisture was conveyed in a similar manner as to the preceding. The barometer was suspended in a corner of the office-room ; all the others within boxes open at bottom, and under the adjoining balcony on the south side of the house. Observations were commenced in November, 1849, and, during the first year, were continued throughout the day and night at intervals of three hours. Afterwards, the journal was placed wholly under the charge of Mr. Smith, and the 3 A. M. observations were necessarily omitted. Besides these tri-hourly records, there were hourly notations on the meteorological term-day of each month, omitting the hours from 1 to 5 A. M., both inclusive, when Mr. Smith was the only observer. The journal closes with September 13, 1852. Among the interesting notes with which it abounds, are those relating to the frequent earth- quakes experienced. A general summary of these, together with such deductions as it was possible to draw from observations, which the phenomena themselves almost incapacitate one from recording properly, have been given in Chapter IV, Vol. 1, and allusion is made to them here only because of their constant influences on the adjustments of our astronomical instruments. At other observatories, the astronomer either finds the level, zenith-point, and azimuth of his meridian instruments almost unchanged during weeks and months, or they are subject to deviations following some general law of which the records of his meteorological journal afford him satisfactory exponents, and his adjusting screws may remain untouched. We dared not rely on the permanence of ours from the commencement to the close of a single series of observations ; for, besides the shocks that vibrated walls, whose warning or accompa- nying rumble started us into attention, there were an infinity of others to which man is physi- cally insensible, but whose occurrences were quite plainly indicated by disturbances of the meri- dian circle and clock. Multiplying work of a certain character, as these imperatively did, there was less time for more interesting observations, and the verifications became greatly more laborious. How excessive these disturbances were, may be judged of from the fact that the earthquakes of one day retarded the clock ll|s., and changed the azimuth of the circle piers 5'. Our work in Chile was completed. Dr. Moesta had taken charge of the NATIONAL OBSERVA- TORY on the 14th September; our original observations had been packed to go round Cape Horn, and the copy remained to accompany me across Panama ; very cordial acknowledgments had been tendered to the government for its unremitting courtesy, consideration, and assistance; a most complimentary letter of leave had been received in reply, and there remained but to order the assistants to the United States before embarking myself. The route of Lieut. MacRae had been a subject of thought for some time. There was an interesting question in magnetism to be solved, and many years might elapse before another equally favorable opportunity would occur ; the geography and meteorology of the region he would traverse for these observations OF THE EXPEDITION. xli were almost unknown, and of themselves merited a special journey; I therefore determined to place suitahle instruments in his charge, and to direct him to proceed home via the Uspallata pass of the Andes, and the pampas of the Argentine republic. In addition to the magnetical instruments, he was supplied with three pocket-chronometers ; a sextant and an artificial hori- zon; a Bunten's and an aneroid barometer; thermometers, &c. ; and his orders were as follows: " It being considered of much interest to science that a series of magnetical and other obser- vations should be made at various heights and across this continent, you will take charge of the instruments selected for the purpose, and proceed to the United States, via the Uspallata pass and Buenos Ayres. The successful prosecution of your expedition being dependent on the transitable condition of the Andes, for which no definite period can be assigned, the time of departure from Santiago is left to your discretion. On arriving at Buenos Ayres or Montevideo, should you ascertain that the United States can be reached more exptiditiously by so doing, you are authorized to proceed to England in the mail steamer, in which case you will convey the instruments to Woolwich and repeat the observations there also, for the purpose of ascertaining what changes, if any, have taken place in the magnets since they were first examined by Col. Sabine, R. A. And as there are facilities for determining the temperature co-efficients of the magnets at Woolwich which may not be so readily accessible at Washington, should you visit England, it is desirable that these experiments should not be omitted. " In the journey across the Andes and pampas of Buenos Ayres, the objects to which your attention is especially directed are : 1st. The law of the decrease of magnetic intensity with height. 2d. The measurement of zenith distances of celestial objects exceeding 90°, with a view to improving tables of refraction. 3d. Geographical information. 4th. Meteorology. " The height of the Uspallata pass being about 14,000 feet above the level of the sea, it is desirable that all the magnetical elements be determined at five nearly equi-distant elevations, both ascending to the Cumbre and descending towards Mendoza. At the summit, the observa- tions for total intensity should be repeated, and at not less than two intervals of the deflecting magnet. Here, also, you may have the best opportunity for observing zenith distances. Crossing the pampas, the magnetical observations should be made, as nearly as practicable, at every hundred miles of longitude, or, assuming Mendoza to be in longitude 69° west of Green- wich, and Buenos Ayres in 58^°, there will be six stations between these two cities. ' ' Though it is not to be expected that you will have time to execute an elaborate map of any great breadth of country, your chronometers and astronomical instruments will enable you to locate with far greater accuracy than is now known, not only the stations you may select, but also the towns, rivers, and lakes near which you may pass. Whatever information you collect cannot fail to be of the highest interest to geography, and your attention is particularly invited to the lakes and rivers lying between Mendoza and Rio Quinto, just beyond San Luis. Have these rivers and lakes outlets in the Parana, or are their waters lost in the sands of the pampas? It is possible that manuscript maps will be found at some of the cities you may visit, of which it may be permitted to make copies. "Nine A. M., and 3 p. M., being near the hours of maximum and minimum atmospheric pres- sure, should be selected for meteorological observations whenever you are stationary. These, better than any others, will enable us, when calculating the elevations of your stations, to deter- mine the corrections applicable to observations at other epochs. The temperature of dry and wet thermometers, the direction and estimated strength of winds, and character of clouds, will occupy your attention also. To these, many notes may be added respecting the hours at which the winds begin in the morning; the electrical state of the higher atmosphere; whether there are strata of clouds moving in different directions above the Andes — facts that will throw light on the meteorology of a region almost if not quite as little known to us as is its magnetical condition. "Baron Humboldt has desired to be informed whether the snow on the mountains is of a 'glowing red' color about sunset and sunrise, as he had often observed it on the Alps and the G° xlii ORIGIN AND OPERATIONS OF THE EXPEDITION. Himalaya chains at those periods. From this side of the Andes we have not unfrequently wit- nessed such color about sunset, and your journey will afford opportunities to ascertain whether the phenomenon is observable in the morning. Conversations with intelligent Argentines give reason to believe that there are periods when the atmosphere is in such a condition about sunrise as will reflect the red rays from lofty mountain tops to observers on the plain. " Any information you can collect respecting the populations through which you pass; their resources, both agricultural and mineral ; their manufactures and commerce with other towns of the republic; the number of births and deaths; the condition of morals, diseases, and crimes- all will give additional interest to your report. "In a service of the nature on which you are about to set out, of necessity, much is left to your discretion. Your ability and zeal in behalf of the Expedition, and the service to which we belong, afford every confidence that the duty will be executed with credit to yourself and the navy. At its completion, proceed to Washington and report to me, furnishing, as shortly thereafter as may be practicable, a detailed narrative, which will be presented with my report to the honorable Secretary of the Navy. "Six hundred dollars are furnished you for travelling expenses, and a draft on Messrs. Baring Brothers for £100, equal to $484, on account of your pay from 1st of October proximo, inclu- sive. Of the former you will keep an exact account, taking vouchers whenever it is possible to obtain them, to be returned in the settlement of your account at the office of the Fourth Auditor. " Wishing you a pleasant journey, and early re-union with the other members of the Expe- dition, I am, &c." Lieutenant MacKae returned to the United States in April, 1853. Having been thrown from his mule shortly after leaving Mendoza, his barometer was broken, and it was feared that the rates of his chronometers were so disturbed as might throw doubt on the longitudes of the mag- netical stations selected on the great pampa. Most laudably and earnestly desirous to perfect his work, he immediately volunteered to return at his own cost ; and being permitted to do so by the honorable Secretary of the Navy, he sailed for Buenos Ayres in August, crossed both the Portillo and Uspallata passes, and finally arrived at Washington in March, 1854. His report has been given at length in Vol. 2. It will be remembered that the programme of the Expedition proposed a collection of objects in natural history. Unfortunately, our party was so small that no member of it could be spared from the more pressing duties of the mission. Nevertheless, through friends, and by purchase, quite a large proportion of the native birds and minerals, together with some of the mammals, fish, reptiles, shells, fossils, botany, and Indian antiquities, were brought home by me. Many of the mineralogical specimens are of rare interest and value. Plants, bulbs, and seeds were also forwarded to the government establishment at Washington every few months of our resi- dence abroad, and many of them of a useful and ornamental character, wholly new in the United States, are now thriving. Such of the objects as were new to science have been well figured, and are described by eminent gentlemen selected by the Smithsonian Institution, which very considerately consented to direct their elaboration. The names of the naturalists prefixed to the several appendices of Vol. 2, are satisfactory evidences that none could have performed more ably the duties with which they had been intrusted. Duty having constantly confined Mr. Smith to Santiago, or its immediate vicinity, he was unwilling to return to the United States without having seen something more of Chile. He therefore resigned his appointment, and proceeded to the southern provinces, where he had an opportunity to learn more of the Araucanians than has probably ever been permitted to an in- telligent white man. We parted from him with regret. Mr. Phelps and myself embarked at Valparaiso October 1, and after a detention of fourteen days on the isthmus of Panama, reached New York just thirty-nine months after I had left that city. WASHINGTON, 1854. j_ M_ GILLm OBSERVATIONS THE PLANETS MARS AND VENUS, CERTAIN PRE-SELECTED STARS NEAR THEIR APPARENT PATHS 1849-'52. MARS AND VENUS. SANTIAGO OBSERVATIONS. INTRODUCTION. DESCRIPTION OF THE OBSERVATORY. The rotary observatory of the astronomical expedition occupied a terrace constructed 175 feet above the streets of Santiago, and on the northern slope of Santa Lucia. Its elevation above the sea is 1,940 feet. The terrace was formed partially by breaking down crags of the rock com- posing the hill, and partially by building a dry wall thirty feet high, upon a projecting ledge, from the west side. Between the wall and slope of the hill, the space — perhaps six feet wide at top — was filled with fragments of porphyry and loose earth, to which solidity was given by pouring in water during the progress of the work. An artificial surface was gained by these operations forty feet in extent from east to west, and twenty-five feet wide from north to south. As this terrace is nearly ten feet more elevated than that on which the observatory building for the meridian circle is erected, a flight of steps was made from one to the other by using the columnar strata of the hill. The rotary observatory occupies the western side of its terrace, with only a narrow pathway between it and the face of the artificial wall. The pier for the telescope was first built. On a mass of masonry, five feet in diameter and two and a half feet high, there are secured four capping-stones of red porphyry that form an octagon seven inches thick and inscribed in a circle 6.5 feet in diameter. No single stone of such dimensions could have been quarried by the artisans of Santiago, and if obtainable, could not have been raised to the observatory without sending to Valparaiso for machinery. The base of the masonry was the native rock, and the bed and joints of the cap-stone were filled in with a grouting of hydraulic lime. A foundation of masonry, fifteen feet in diameter, and rather more than a foot in height above the surface, was built on the rock, in situ, sur- rounding the pier, to receive the sill of the observatory. The sill, formed from circular segments of one and a half inch plank, five and a half feet long, is put together so as to break joints, and rests immediately on wedges laid on the masonry diametrically. A grooved cast-iron rail is secured by screw-bolts and nuts near the centre of its upper surface, and the level of the sill is perfected by means of the wedges. The curb is formed in the same manner, but of rather stronger wood, and it is rendered more inflexible by the manner in which the corresponding grooved rail is secured to its under side. It rests on six 24-pounder cannon balls. Both the curb and sill are composed of two thicknesses of plank. The frame-work of the building, supported on the former, is of light and well-seasoned yellow pine, and the weather-boards are of white pine, tongued and grooved together, and fastened to the frame by screws. The height to the eaves is eight feet. The roof is a cone, having for its apex a tin cap, hung by one edge on long hinges, .and which, when closed, laps two inches over the wood-work all round. The aperture covered by the cap is two feet in diameter; the width of the door in the inclined roof twenty inches. An upright, that passes through the roof and xlvi INTRODUCTION TO TUB is bolted to one of the rafters, serves as a leader for the pulley to elevate the cap. This may be thrown beyond the vertical, if necessary, and a single cord fastened to the strengthening bars of tin across its base, serves to pull it down after the inclined door has been first closed. Although of like materials and construction as the weather-boarding, a canvass cover was accu- rately fitted to the roof for additional security. This was drawn tightly over the planks, and when securely nailed down and painted, the portion obstructing the door-way was cut away. There is a small window opposite the door of entrance. The foundation-wall was sufficiently wide to support the ends of the" floor-joists, also. These timbers were framed entirely free of the masonry-pier in the centre, and were of such width that the floor was on a level with the upper surface of the curb. To prevent the building from wabbling, there are three horizontal, equi-distant, and adjustable rollers secured to the joists, the space between them and the curb not exceeding one-fourth of an inch. The building was first erected at Washington, and its several portions carefully numbered before taken down for transportation. As it was extremely light, no machinery was required to turn it, slight pressure by the hand being quite sufficient to move it in either direction. Altogether, it may be ranked among the most economical and easily-managed rotary observa- tories ever built. THE EQUATORIAL. The equatorial telescope was made by Mr. William J. Young, of Philadelphia ; its object- glass, from French materials, by Henry Fitz, jr., of New York; and its micrometer by Mr. William Wurdeman, at Washington. As will be seen in the opposite plate, the construction of its stand is that devised by Frauenhofer, and since so successfully built by Messrs. Merz & Mahler for observatories in many parts of the world. The diameter of its object-glass is 6.4 French inches, with a focal length of 103. *7 inches. Its polar and declination axes are frustums of steel cones, the former twenty-one and a half inches long, with diameters of two and a half and one and three quarters inches at its two extremities, and the latter twenty-two inches long by three and a half and two and a half inches diameter, respectively. The hour-circle, with a diameter of nine and a half inches, is divided on a band of inlaid silver into spaces each of four minutes of time, which are read by two opposite verniers to four seconds, and by estimation may be easily subdivided to one second. The declination-circle has a diameter of twelve and a half inches, divided, also on a silver band, into spaces of ten minutes of arc, divisible by two verniers into ten seconds. It is numbered from 0° to 3GO°, and reads 0° when the telescope, pointed to the equator, is on the west side of the stand. The finder has an object-glass, 1.75 inch in diameter, with a focal length of eighteen inches. This latter object- glass and the eye-pieces to the micrometer are somewhat imperfect, and there is some little play to the declination axis ; but, except these defects, the instrument is admirably constructed. The supporting-stand is of solid and well-seasoned black walnut, dried in a kiln for more effectual security against shrinkage in the dry summer atmosphere of Chile. It rests on four heavy steel screws, by means of which the adjustments for polar elevation and transverse level may be effected. The azimuth is controlled by horizontal screws, working through iron clamps let into and firmly fastened to the pier at the two meridional foot-screws. A driving-clock is fitted to the instrument ; but dust accumulated so rapidly in summer, that its use was never attempted after the first few nights. The repeating-micrometer has a divided circle of four inches diameter, which may be read by one vernier to 30". Constructed on the English plan, its counting-scale is within the box, each five teeth of the comb being separated by a deep indentation. It has five permanent transit-wires, and two parallel movable wires perpendicular thereto. One of the latter is pro- vided with a register-head, divided into one hundred equal parts ; the other is only a zero-wire. Its eye-lenses, with magnifying powers from one hundred and fifty to five hundred times, may be moved parallel with the register-wire by means of a rack and pinion and clove-tailed slide. THE EQUATOREAL. SANTIAGO OBSERVATIONS. xlvii For "dark-field" illumination there are two lamps suspended on gimbals, that throw light througli the small tubes seen on the plate-in advance of the micrometer ; but there is no means for illuminating the field. When unpacked, all the wires put in by the maker were found to have been broken, and the most available material from which to insert a new system was an exceedingly delicate and uniform fibre of unspun Chinese silk. From the 6th of December, when the instrument was fully mounted, to the evening of the 10th, was passed in becoming familiar with its peculiarities, and bringing it into approximate adjustment, correcting its errors one by one to nearly minimum amounts. It is unnecessary to transcribe the observations made during the several approximations, but only those which were just prior to commencing the appointed series of differentials. After the observations of Decem- ber 10th, none of the screws were ever disturbed. Observations to determine the position of the Instrument. Date. Dec. circle. Star. Time. Hour circle. Dec. circle. Barom. ~~— ~~~~~~~~ Temp. 1849. A. in. s. h. jn. x. • i i, Inche*. o Dec. 10 E. a Eriilani . . 1 30 2.3 11 57 54 57 58 35 W. 1 42 17.0 13 10 10 302 1 0 E. a Favonis . . S 13 41.4 600 302 46 50 W. aCeti . . . 2 25 18.9 11 30 52 3 29 50 E. 2 35 23.0 11 40 56 356 30 30 E. 2 39 43.6 11 45 17 356 30 30 W. 2 45 46.7 11 51 20 3 30 0 W. t Argus . . . 3 11 54.0 6 1 12 58 40 0 28.170 67.5 1850. Oct. 18 E. /? Aqunrii 21 8 7.1 23 42 49 6 15 30 W. 21 20 39.7 23 55 26 353 45 0 E. 0 Tri. Aust. . . 21 59 48.2 6 16 18 297 2 25 W. yllydri . . . 22 14 7.3 6 24 23 74 42 0 28.000 64.0 1851. Dec. 16 W. ij Argus . . . 4 38 6.4 600 58 54 30 E. /? Orionis . . 5 4 29.8 11 56 0 8 23 30 W. 5 12 25.0 0 3 55 351 37 10 28.040 61.5 1852. May 29 E. a' Crucis . . 12 11 7.6 11 52 0 62 17 20 E. a Argus . . . 12 21 20.5 600 307 22 0 W. a' Cruets 12 26 30.4 0 7 24 297 43 20 28.150 46.8 Let d and d' represent the readings of the declination-circle, d when that circle is to the east of the stand; t and V the times of observation, t when the declination-circle is east; h and h the corresponding hour-circle readings; ?rthe polar distance of the star observed, ? its refraction in altitude, and ?' its refraction in polar distance: then, if we call the index-error of the decli- nation-circle e, the collimation-error of the telescope c, the vertical error of the polar axis a;, and its azimuthal error y ; d' — 360°); when the star is in the meridian, and when the star is six hours from the meridian, xlviii INTRODUCTION TO THK Applying these formulas to the preceding observations, the instrumental deviations at the successive dates were as follows : Instrumental deviations. Date. 0, c. I x. y. 1849. « a it Dec. 10 12.5 W. ±0.0 + 44.5 , —63.7 1850. Oct. 18 15.0 E. + 32.85 — 83.9 — 1.6 1851. Dec. 16 20.0 E. — 1.50 — 4.2 +73.0 1852. May 29 20.0 E. + 4.20 — 33.2 —49.0 These results show that the deviations of the equatorial could have no appreciable influence on observations made as were the differential measures with the planets Mars and Venus. Value of the Micrometer Screw. To determine the value of the micrometer-screw, transits of ft Hydri were observed over the index and micrometer wires, placed at intervals of five, ten, and twenty revolutions apart. They gave the following results at different periods : Date. Star. No. of revolutions. No. of observations. Mean of the times. Equatorial interval. Value of one revolution. 1849. *. » H Dec. 13 0 Hydri . . . 10 10 62.800 194.130 19.413 do ... 20 10 125.650 388.415 19.421 1850. Feb. 1 do ... 10 10 63.050 194.934 19.493 do ... 10 10 63.110 195.120 19.512 do ... 5 10 31.685 97.962 19.592 1851. Mar. 14 do ... 10 10 62.820 194.366 19.437 20 do ... 10 20 63.040 195.057 19.506 1852. Mar. 16 do ... 10 20 62.765 194.550 19.455 19 do ... 10 20 62.860 194.587 19.459 do ... 5 20 31.435 97.309 19.466 June 2 do ... 10 20 63.175 195.944 19.594 The value adopted for the reduction of observations is 19".49. The diameter of the micrometer-wires was first ascertained by turning the telescope towards clear sky during day-light, and bringing the movable wire in contact with the index-wire alter- nately on each of its sides. Under a magnifying power of 235, the index-wire appears some what the greater of the two, but they formed part of the same fibre, and the difference between them could not be detected when superposed. A mean of ten measures by day-light gave for the diameter of the two 2". 504, or, on the assumption of equality, each wire had a diameter of 1".252. Observations by lamp-light, however, give a very different result. Thirty measures, made at different periods, show that the effect of the lamps is to increase the apparent diameters from 1".252 to 2". 199. In the reduction of all observations after lamp-light, the diameter adopted is 2". 20. Frequent occasions occurred, during the progress of the adjustments, to test the optical capacity of the instrument. The first object viewed with it was the planet Saturn ; and though twilight had scarcely closed in, five of the satellites, the shadows of the rings, and dark inte- rior spaces, were admirably shown under a magnifying power of 235 times. The sixth star of SANTIAGO OBSERVATIONS. xlix the trapezium in the sword-handle of Orion was distinctly seen whenever sought at rea« MI able altitudes; it separated unequal and close double stars, as A Octantis, with great precis., >n and sharpness, and defined the millions in the gorgeous cluster surrounding 47 Tucanse with won- derful effect. An aggregation of star-dust, as appears this most extraordinary object, a power of 235 almost separates each brilliant particle from the rest. LATITUDE. Twelve hundred and sixty observations have been discussed for the latitude of the meridian circle, from which only nine observations of the twenty-two selected stars have been excluded, and on each of these occasions there is doubt of the true circle-reading. Bessel's refractions, as constructed by Professor Coffin, U. S. N., for the Washington Obser- vatory, have been used in the computations. A special table for barometric corrections, ren- dered necessary by the elevation of the observatory above the sea level, has been so formed that all the logarithms remain positive on subtracting .02306 from Log. R of Table II. All the observations were reduced to mean places of the stars January 1st, 1851, and the declinations at that date have been derived from the British Nautical Almanac for 1858, by application of the annual variation in declination during 7 years. From quick moving stars. No. Star. Zen. diet. Adopted mean declination. No. of ob- servat'ns. Resulting latitude. Probable error. 1 o / S. 0 43 « 1 II —34 9 22.28 56 0 / /; 33 26 24 88 -[-0 243 2 N. 3 2 30 24 38 54 41 25 87 257 3 N. 4 40 28 46 22.38 62 25 29 234 4 N 7 21 26 5 47 43 92 25 56 160 5 N. 9 34 23 52 40.46 67 25 03 159 6 ff Corn N. 10 52 22 34 20 09 37 26 26 246 7 ff Ceti N. 14 38 18 48 19.54 29 25 40 252 8 N. 23 3 10 22 55.48 39 24.46 232 9 0' Ccti N. 24 28 8 57 13.84 34 25.33 264 10 S. 24 34 57 59 41.72 46 24 66 227 11 N. 23 3 8 22 40.70 14 24 49 523 12 S. 25 12 58 39 3 69 79 23 45 178 13 N. 25 25 8 0 55 51 71 25 02 193 14 N. 36 56 + 3 30 6.84 45 25.87 .237 15 N. 48 51 15 24 17.17 38 25.00 .246 16 N. 54 47 21 20 20.88 48 24.93 .199 17 N. 61 49 28 22 52.83 51 25.92 .216 18 /? Tauri N. 61 55 +28 28 33.90 31 24 14 406 No recent observations appear to have been accessible from which to correct the mean places of * Eridani and < Argus subsequent to the publication of the Nautical Almanac for 1851, (in 1847,) and as one certainly is, and the other may, very probably, be in error, they have not been incorporated in the mean. Giving to each of the other stars weight proportionate to the number of observations, the latitude resulting would be S. 33° 26' 25". 27 with a probable error of ±0".042. H° INTRODUCTION TO THE From circumpolar stars. No. Star. Zen. ili-l. No. of ob- servat'ns. Resulting lati- tude. Probable error. 1 U. C. f 55 50 47 o ; // 33 26 25.95 // ±0.212 L.C. I 57 17 32 U. C. f 44 40 39 2 0 Hydri . . . . -I 26.18 .206 L.C. [ 68 27 42 U. C. f 45 02 56 3 25.88 .196 L.C. 1 68 05 19 4 U. C. f a Tri. Anst J 35 18 112 25.55 .125 L.C. I 77 49 24 As these are wholly independent of tabular places, preference is given to the latitude resulting from them, though differing in excess from the determination by quick moving stars more than half a second of arc. Combining the four partial determinations of circumpolar stars by weights derived from the sum of the numbers of observations at each culmination by their product, the adopted latitude is — 33 26' 25". 89, and comparing each of the observations with this, the probable error, by the method of least squares is ±0".0866. The equatorial is 53£ feet to the south of the meridian circle. LONGITUDE. The longitude of the circle computed by Mr. S. L. Phelps, from moon culminations and occultations observed during the same period is as follows,* the corrections to the moon's tabular place, referred to in both series, having been computed by the methods given by Professor Benj. Pierce in the Annual Keport on the progress of the United States Coast Survey for 1854, pp. 115*-*120. The equatorial is 16 feet to the west of the meridian circle. Longitude from corresponding moon culminations. Moon's first limb. Moon's second limb. Observed at No. of ob- servat'ns. Resulting longi- tude. Probable error. No. of ob- scrvat'ns. Resulting longi- tude. Probahle error. Adopted longitude of station. 18 22 29 22 17 17 23 9 5 h. m, s, 4 42 35.44 32.51 32.45 32.81 33.85 33.18 33.90 35.73 37.94 ±1.71 1.25 1.05 0.93 1.58 1.77 1.51 2.22 6.96 10 8 20 5 S 1 h. m. 5. 4 42 32.73 32.25 32.85 34.89 35.06 39.21 8. ±2.64 3.42 3.12 4.72 5.59 A. m, s. — 39 54.10 — 22.75 .00 .00 -f 5 2.60 4 44 30.66 5 0 38.56 5 8 12.20 +5 19 45.00 Greenwich, (moon's cor. tab. places) . . . Philadelphia Charleston, (S. C.) 162 4 42 33.91 49 4 42 33.27 Longitude from moon culminations m. 33j.74 ±0».993.. o A public acknowledgment iadue to the Astronomer Royal, G. B Airy, esq.; Professor Challis, Cambridge, (England ;) M. J. Johnson, esq., Badcliflfe astronomer, and Professors Bache and Bond for their prompt courtesy in communicating observations of moon culminations in advance of publication, and to Lieutenant M. F. Maury, Superintendent United Statea Naval Observatory, for the apparent places of the group of stars preceding r> Orionis, which Mr. James Ferguson deter- mined by micrometrical differentiations with the latter star. SANTIAGO OBSERVATIONS. Longitude from occultations. li Date. Star. Phase. Sid. time of observation. Star's R. A. Star's declina- tion. Computed correction to moon's place. Resulting lon- gitude. 1850 Mar. 20 May 14 Nov. & 19 1851. Jan. 13 May 17 July 9 Nov. 14 Dec. 4 1853. Feb. 27 April 6 May 5 June 2 3 Ini k. m. s. 7 20 23.79 21 1.79 27 53.28 53 59.87 8 4 20.75 47 35 60 9 40 47.79 10 7 56.93 10 24 20.91 10 55 28.11 0 2 29.77 4 58 9.26 6 17 45.48 5 3 43.25 6 45 24.91 12 35 57.46 15 39 18.28 5 32 35.42 2 31 38.06 6 45 48.72 13 48 36.49 17 49 22.42 13 21 0.23 18 34 36.78 h. m. s. 5 51 8.74 15.23 23.44 52 1.54 27.61 53 46.85 55 0.74 5 54 34.71 6 17 53.98 6 19 0.68 19 0 58.27 4 14 20.77 4 16 52.51 4 14 21 .02 4 16 52.72 IS 621.11 16 32 41.96 8 45 25.62 2 3 32.40 4 19 58.19 15 35 46.23 17 12 9.44 17 34 35.40 18 45 15.43 ° / // +20 3 23.8 19 58 27.2 20 2 17.3 19 48 0.5 19 52 27.9 19 55 38.3 20 8 4.3 19 41 8.8 20 30 57.5 +20 34 42.5 —20 2 7.5 +17 11 13.6 17 34 54.3 17 11 12.9 +17 34 53.4 —20 45 54.8 —17 45 47.0 +20 31 25.5 7 52 24.9 +18 50 47.2 —15 11 51.4 20 56 54.8 31 36 19.3 —22 55 14.4 «. —0.29 0.29 0.29 0.29 0.29 0.29 0.29 0.29 0.87 0.87 1.25 1.23 1.32 0.70 0.70 0.39 0.33 0.82 0.60 0.23 0.34 0.69 0.70 —0.62 ft. m. a. 4 42 40.32 22.58 44.34 32.21 37.66 45.32 33.58 20.86 38.46 33.15 31.32 36.55 39.52 32.86 34.38 34.28 28.96 28.49 38.26 25.08 40.67 32.64 38.32 4 42 40.05 Orionis Im. . Im. Em. . Im. . Im. . Im. . B. A. C 2084 i* Tauri Im. . Im. . Im. . Em. . Im. . Im. . Im. B. A. C . 5573 B. A. C 3017 £ Ophiuchi Im. . Im. . Im. 58 Ophiucbi »' Sagittarii Lo ngilude from nccultations 4h. 42m. 34s. 16 Probable .922 Making each result from occultation equivalent to two from moon culminations, and then combining the partial determinations by the two methods with weights proportioned to their respective numbers, we have for the adopted longitude of Santiago west of Greenwich 4h 42m 33'.81. DIFFERENTIAL OBSERVATIONS. MODE OF OBSERVING. A siderial chronometer was used in the differential observations. It was compared with the clock immediately before or after the series, though more frequently after the series for the evening was completed. When the lamps were lighted, and the amount of illumination properly diminished, the telescope was directed approximately to the place of the planet, its declination circle clamped, and the relative place of the proper comparing star ascertained by inspection of the map and ephemeris. The instrument was then moved by the slow motion screws so that each object should pass equidistant from the centre of the field. Moving the micrometer screw so that its wire would nearly coincide with the object first in right ascension, the telescope was then turned to the west by the tangent screw to the hour circle until the first object to be observed was just without the field. It remained immoveable in this position until the transits and difference of declination of the two had been recorded, after which, it was again thrown to the west, and so lii INTRODUCTION TO THE continuedly until the work for the night terminated. Except in cases where the two objects were so near in right ascension, or the space through which it was necessary to turn the screw was so great that one reading was, of necessity, after the second object had passed that wire, the difference of declination was measured by two independent readings of the micro- meter when bisecting the star or tangent to the limb of the planet at transit over the middle wire. The observation was always perfected by turning the micrometer in the order of the number on its divided head and which was against the spring within the box. On one or, perhaps, two occasions this space was so great and the difference of right ascension so little, that it was indispensable to use both the slow motion screw of the declination circle and the micrometer. As would be inferred, these observations are not at all satisfactory. To eliminate errors of irradiation and assumed semi-diameters, on all possible occasions the consecutive observations were of opposite limbs of the planet. EXPLANATION OF THE PRINTED OBSERVATIONS. Observations with the equatorial. The printed observations, pages 2 — 305, require very little explanation. The first column of each page contains the numbers for reference,. with occasional italic letters, a, b, c, &c., indicating a note in the remarks accompanying each night's observations. The second column contains the name of the planet, and the catalogue from which the com- paring star has been selected. N.P ; N.F ; S.P ; S.F, designate the limbs of the former ; Rumker, 16V3, refers to his " Mittlere Oerter von 12.000 Fix-Sternen ;" Bessel, 405, refers to the 405th zone of Bessel ; H.O. to the " Histoire Celeste" of Lalande ; and W. C., to unpub- lished observations of the Washington Catalogue. The five following columns contain the seconds of observation over the five wires of the equa- torial, and the eighth column, the mean of these times. Broken observations have been reduced by means of the following equatorial intervals multiplied by the Secant of the declination of the object. The intervals were deduced from 100 transits of comparison stars. Equatorial intervals. From December 10, 1849, to January 31, 1850. From October 19,)850,to Feb'rylO, 1851. From December 16, 1851, to January 1, 1852. From January 1 to September 13, 1852. ». +23.690 +11.801 — 0.025 —12.0)3 -23.429 •« +23.687 +11.829 — 0.002 -11.818 —23.743 s. +23.705 +11.797 — 0.098 —11.756 —23.553 s. +23.552 +11.778 — 0.022 —11.756 —23.553 B C D E Column 9 contains the distance of the limb of the planet or star from the stationary horizontal wire expressed in revolutions of the micrometer head. In both series of observations on Mars, and in the first Venus series + signifies that the moveable wire is to the north of the stationary wire, and vice versa. Prior to the second Venus series the micrometer was turned 180° so that throughout these observations the symbols have the opposite signification. Column 10 contains the difference of right ascension between the planet's observed limb and the star, at transit of the former over the imaginary centra] wire of the system Column 11 contains their difference of declination expressed in revolutions of the micrometer -f signifying that the planet is to the north of the star, and vice versa. Columns 12, 13, and 14 contain the barometer and thermometer readings usually noted at the commencement and close of the observations. Remarks respecting the condition of the atmosphere or other influence likely to affect the SANTIAGO OBSERVATIONS. liii • work follow each flight's observations, and then the results derivable prior to a final discussion of the series. These latter embrace the means of all the observations of each limb of the planet combined in groups according to the periods of time through which they extend ; the chrono- meter corrections and true siderial times of observation at Santiago, and, finally, the diameters deduced from the transits and micrometrical measures. In the latter, the variation of the planet's during the interval between the means of the times of observation ^ rtliTnt &8CGI1810D j j of the two limbs has been computed from the " variation of \ ^s^ ascension> I ;n oae hour ( Declination, ) of longitude" given in the Nautical Almanac. Finally, to facilitate comparison with corresponding observations at other stations, the differ- ential refraction (A(«) for each of the means of the times has been computed from the formulas in Vol. I, Bessel's Untersuchungen. A 600"*" • Sin2 (N + f.) Tan N = Cos TO cot 50 54 // —2.349 55 // 2 862 Series 1851-'52 77 —1.504 81 —0.379 131 —1.926 ]36 —1 620 The vertical diameters of Venus have been obtained in three modes : first, as were those of Mars, just explained ; second, by direct measurement with the micrometer screw of the equatorial ; and third, by the micrometer screw of the meridian circle whilst passing the field of that instru- ment. The magnifying power of the equatorial generally used was 150, sometimes 235 ; that of the meridian circle more frequently 144, though occasionally no more than 79. No correction has been applied to measurements with the latter instrument for thickness of the micrometer wire. A mean of the separate results from the several methods is as follows : Planet Venus. No. of ob- servations. Meridian circle. No. of ob- servations: Equatorial direct measure. No. of ob- servations. Equatorial in- ferred. Series of 1850-'51 35 // —1.174 10 n —0.965 4 11 —1.268 Series of 1852 45 —1.505 8 —2.055 26 —1.383 80 —1.340 18 —1.510 30 —1.325 The corresponding observations made at other observatories, and communicated in accordance with the solicitation contained in the ephemeris referred to, pages xxviii, xxix, have also been printed at length in subsequent pages. Believing that a discussion of the solar parallax from observations thus made, by one thoroughly competent yet wholly uncommitted respecting the comparative value of the deduci- ble result, would be appreciated and approved by astronomers, Dr. B. A. GOULD, Jr., was solicited to undertake the task, and, having very considerately consented to do so, all the MS. sheets, as prepared for the printer, were placed in his hands during the month of June, 1855. j. M. GK WASHINGTON, January 1, 1856. THE SOLAK PARALLAX, DEDUCED FROM OBSERVATIONS OF THE U. S. N. ASTRONOMICAL EXPEDITION, UNDER LIEUTENANT J. M.GILLISS, ST B. A. GOULD, JR. THE SOLAR PARALLAX. 51. INTRODUCTORY AND HISTORICAL. The motives which prompted the observations forming the basis of this discussion have been so fully developed by the astronomer under whose direction the expedition was conducted, and the method of investigation contemplated has been so thoroughly explained, that no farther consideration of these subjects seems required or appropriate. The measure of the sun's distance has been well called by the Astronomer Royal of England the noblest problem in astronomy. This distance, known or unknown, is, and must ever be, the standard length in which every linear measure of a celestial object beyond the moon is directly or indirectly expressed ; whether it be the distance of a satellite, a comet, or a fixed star ; the dimensions of a planet, or the gauge of a nebula. It is the astronomical unit ; and every stellar distance is only known as a proportional one, until this unit is established. It is, therefore, manifestly the duty of astronomers to flinch from no labor which gives a remote prospect of increasing the precision of our measurement of this fundamental quantity. The materials now presented for the discussion are the fruit of a national expedition, instituted at the advice, and with the approval, of the nation's ablest astronomers. To their attainment three years were dedicated by the zeal of the leader in the enterprise and his unwearied assistants, and astronomers in other lands have contributed. No pains ought to be spared in deducing from them all that they can be made to yield in furtherance of the end for which they were designed. This consideration has been kept steadily in view, and is a sufficient reply to any criticism which may attribute over-refinement to the numerical computations, or too great minuteness to the combinations of the materials under discussion. When Keppler, after extended study of Tycho's observations, arrived not later than 1620, at the conviction* that the solar parallax could not exceed 1', he attributed to the sun a distance more than three times greater than philosophers had previously supposedf, although his own limit was but one-seventh part as remote as we now know that it should have been. He had, in 1609, in his bookj on the motion of Mars, called it difficult to fix the distance more exactly than between TOO and 2,000 semi-diameters of the earth, (corresponding to a parallax between 1' 45" and 4' 55",) and in his Ephemerides§ for 1617 and 1618, he had supposed the parallax to be 2' 29", according to Tycho Brahe, who deduced it from observations of the moon.|| Peter Criiger, Keppler's intimate friend, upbraided him for removing the sun " to such a huge dis- tance,"T which would destroy the value of all Tycho's tables, after he had himself adopted the Tychonian value in the Ephemeris a few years before ; but Keppler replied** that he had studied the subject with care, and did not hesitate to reduce Tycho's parallax by 1' 40", or two- 0 Epitome Astronomies Copermcaruf, pp. 478-480, 486-490. fKicciOLi, Almag&lum Novwn, I., 107. TYCHO BBAHE, Progymn., pp. 97,415,463. %De Motibus Stella Mortis, p. 71. § KICCIOLI, Almag. Nov. I, 108. HANSCH, Epulote ad J. KEPPLEBUM, p. 473. ||GA8SENDi, TYCHONIS Vita, p. 102. ^| IBID. pp. 473-4. CRUDER to KEPPLER, 1624, July 15. •"Letter to PETE CHUOER, 1624, September 9. HANSCH Epitt. p. 455. Ixii INTRODUCTORY AND HISTORICAL. thirds of its whole amount. His estimated distance of the sun was 3,592 earth's semi-diameters,* but, for the roundness of the number, he adopted 3,600, corresponding to a parallax of 49". Godefridus Wendelinus, (Godfrey Wendelin,) a Belgian astronomer, deduced, in 1647, from morning and evening observations of the moon,f the value of the solar parallax as 15" at the outside, or the distance at least 13,740 terrestrial semi-diameters, and fixed 14,656 of these semi-diameters as the most probable value. Kicciolus, rejecting this comparatively small value, arrived at the conclusion,! in 1665, that a value between 28" and 30" could deviate only by very few seconds from the truth. Eicciolus gives an interesting list of the successively adopted values,§ a tabular view of which is as follows, the references having been verified or corrected in all cases where I have access to the originals, which has been generally the case, and in some instances made more complete. Distance of the sun from the centre of the earth, expressed in terrestrial semi-diameters. Authority. Mean distance. Authority. From Hipparchus' data or Posidonius, (apogee) Ptolemy and Maurolycus Clavius, Barocius Aibategnitu and Alphonso , Lansberg, from data of Albategniui, (apogee) , Alfraganus Jno. Femelius Copernicus, Maginus Lansberg, from data of Copernicus, (apogee) Michael Neander Mtestlinus Jno. Offusius Tycho and Blancanus Longomontanus Keppler, [3] in Ephemerides . . . . Stella Martis . . . . Stella Nora . . . , Epit. Astron., (apogee) Tab. Rudolphin . . . LansbergittB, (min. eccentricity) . . Ism. Bnllialdoi Atbanasins Kircherus Anton. Maria de Bbeita .... Wendelinus Galileo Marius Betunns Langrenus Ricciolus Ricciolus, (in round numbers) . . . 1473 1379 13141 1168 1168 1107 7936 1215 1256 1142 943 1160 1160 1152 1150 1768 1768 1432 3469 3381 1499 1460 1906 2000 14656 1208 1145 3420 7327 7300 Plinus, Lib. II., cap XXII. Ed. Siilig I., 130 [1.] Almagest, Lib. Id., c. iv. ; V., c. XV. ; Maur. Cosm. Clavius, Comm. in Sphajr., p. 215; Barocius Cosmogr. I. -i-. Albategn, capp. XXVIII. XXX. L.; Alph. Tabb. MS. letters to Ricciolus. Alfragani Rud. Astron. ; Different. XXI. Cosmotheoria, Lib. I., cap. 7. Cop. de Rev. IV., capp. 19, 21 ; Magin. Nov. del. Orb. TUeor. I., cap. 3, II. cap. 24. apnd Ricciolum. Sphsra Mundi, p. 124. Appendix ad Kcppleri Myst. Cosm., p. 168. De Dirina Astrorum Facaltatc. Tycho, Progymn, (Ed. 1648,) pp. 5, 101, 275, 296, etc. Blancanus, Sphara Muudi, Lib. X., cap. 1. \su. Danica. p. ii., pp. 171,231, 241, 298. p. 2. Chapter XXX., p. 162. Cap. XVI. Lib. IV., 4«5, 490. Precept. 141, p. 98. Tabb., p. 92. Proleg. Uranometria ; Lib. II., F.lem. 11. Astron. Fhilolaica, Lib. IV., cap. i. Are Magna Lucia et Umbra. Lib IX., Probl. 9. Radius Sidereomysticus, p. 20, Lib. iv. Idea Tabb. Atlant., in Eclips. Lun. ; MS. letters to Ricciolus. Dialog. III., de Syst. Mundi ; Syst. Cosm., p. 266. Apiaria Univ. Phil. Math. ; Apiar. X. US. cited by Ricciolus. ' Aluiag. Xovum I., 731. [1] 8*8 LAHSBK'S TraW. d' JUroaomie II. 402, 3. [3] Sua hint remprt Cenwnnu. de die natal, 13. SiUig. PKniu* I, 129. [3] RICCIOLI, Lit. Ill, ScAoI. II, p. 111. The next attempts at determining the parallax were those of Cassini and Richer. The latter astronomer was sent by the French Academy to South America for purposes similar to those which prompted in our days this present expedition of Lieutenant Gilliss. His observations were published! in 1679, after his return, and his declinations of Mars were compared by •Ibid., p. 456. t RICCIOLI Almagrtum Nowm, I, 109, 731. WHDLEB But. Aitr. p. 457. See also his letter GASSESDI Op.omn. VI, 464. f RICCIOLI Aim. Nov., I, 110,731,734. §Cf. PLCTAKCH depladtit PhOotophorum lib. II, cap. 31. Aristarcrms Propos. 7. tutronomiguu etphyxque, fate m fhU de Cay*™, par M. RICHEE, Paris, 1679. Also Htm. de PAcad. Roy. da Ijp. 233. INTRODUCTORY AND HISTORICAL. Ixiii Cassini,* with the contemporaneous observations! of himself, Picard, and Roemer, at Paris and Brion, in order to deduce a better value for the parallax. The planet had been compared, both at Cayenne and Paris, with * Aquarii, but Cassini did not succeed in obtaining any good value, farther than deducing an upper limit of 9", if the observations were to be trusted. In 1681 however,! Cassini published a memoir revising his computation from the materials and from correspondent observations, 1672, September 5, 9, and 24, deduced as the equatorial horizontal parallax of Mars, 25^" ± 3", corresponding to a solar parallax of 9". 5 ± 1", or a distance from the earth of 21,600 terrestrial semi-diameters, § and with a possible error of 2,000 or 3,000 semi- diameters. From these values he inferred the true diameter of the sun to be just one hundred times that of the earth. About the same period, Cassini, with Eoemer and Sedileau, tried|| the method of parallaxes in right-ascension, proposed by Cassini himself, and employed by him to ascertain the distance of the comet of 1680. He proposed, from a comparison of the observed right-ascensions of the celestial body on opposite sides of the meridian, to deduce the amount of its geocentric parallax; but this attempt, though laboriously carried out, was entirely unproductive of satisfactory results. Observations were made at the same time by La Hire,Tf but without convincing him that the parallax was sensible, as Lalande infers,** from the fact that La Hire, in his well known tables,ft published in 1687 and 1702, never employed a larger value than 6". Flamsteed, who had been, during the same period, observing in England, fixed the upper irnit of the parallax of Mars firstJJ at 30", and then§§ at 25", so that the solar parallax could not exceed 10", or 21,000 terrestrial semi-diameters. The transit of Mercury, 1677, October 28, was observed at St. Helena by Halley, who ob, tained|||| 45" as the resultant parallax, but attributed but little weight to the determination- preferring a value between 10" and 20". The arguments of Streete in favorll of a value 15" are cited by Halley with apparent approval, and are very curious. In this connexion, Halley again urged the great advantage of the transits of Venus for the determination of this important quantity,*** as he had already doneftt iQ 1691. La Caille's astronomical expedition to the Cape of Good Hope took place in 1740. Animated by the encouraging example of Eicher, he founded an astronomical shrine in the southern hemisphere, which has since been rendered even more illustrious by the labors of such men as Henderson, Herschel, Fallows, and Maclear, offering an example well deemed worthy of imita- tion by our younger land. La Caille made a large number of observations of the declination of Mars at opposition ; and from a comparison of these with corresponding measurements in the northern hemisphere, extending through about six weeks, deduced the value of the solar parallax as 10". 2. In the succeeding year, 1741, he repeated the investigation, and with a result not essentially different. The mean of four correspondent observations of Venus at her inferior conjunction in 1751 was similarly computed by La Caille, giving 10". 38 as the mean value, and, from the whole seriesJJJ of investigations, he arrived at the conclusion that the horizontal equatorial ° Recueil d" Observations fails en plvsieurs voyages, Sft., Paris, 1693. Rec. de Item. deVAcad. VH, P. 1, pp. 353-5. t Mm. de I'Acad. Boy. dts Sciences, VII, P. pp. 331, 351. J Mtm. de I'Acad. Roy. des Sciences, VIII, p. 55. § Memoires de I'Acad. Roy. des Sciences, VII, p. 115. || Ibid., pp. 105-7. ^| Ibid., p. 111. °o LAIANDE, Astron. II, p. 413. tf LA HIRE, Tabula Astronomic^, p. 6 ft Phil. Trans. 1672, No. 89, pp. 5118. §§ Phil. Trans. 1673, No. 96, p. 6100, (erroneously printed 6000.) 1 1'hil. Trans., No. 193, p. 511. I have not access to Halley's Southern Catalogue of Stars, in which arc given his observations of the transit of Mercury. Tftf See LALANDE'S Astronomic, § 1729, II., 409 ; Astron. Carolina, ed. 1661. p. 12 ; ed. 1710, p. 34. °»o Phil/Trans., 1716, p. 454. tft Phil- Trans. 1673, No. 93, p. 519. }$ Mem. de I'Acad. det Sciences, 1748, 601 ; 1751, 310 ; 1760, 73. See also CASSTSI DE THUBY, 1760, 292. ]xiv INTRODUCTORY AND HISTORICAL. parallax of the sun may be assumed as 10£" without danger of an error exceeding 0."25, thus attaining* a most remarkable accordance with the results at which Cassini and Flamsteed had arrived in the previous century. About 1760, Tobias Mayer struck out a new path, and deduced a value for the solar parallax by means of the lunar theory. One of the equations for the perturbation in longitude depends on the simple angle between sun and moon, and the coefficient had been, up to that time, determined by the employment of 10". 8, as the amount of the solar parallax, which forms one factor. Mayer, however, comparing! theory with observations, deduced empirically a new value for the coefficient, whence he obtained 7". 8, which determination he esteemed subject to an error of one twenty-fourth part, at the outside, since the co-efficient 1' 55", upon which it depended, could not be in error by more than 5".J The transits of Venus, in 1761 and 1769, had long been awaited by astronomers with intense interest, and were regarded throughout the world as the best means available for accurate determination of the dimensions of the orbit of the earth, and of the value in terrestrial measures of the unit in which celestial measures are necessarily expressed. A concise narration of the efforts made to procure accurate data, and of the materials collected, may be found in the mas- terly and standard discussion of the problem by Encke.§ The English sent|| Maskelyne to St. Helena ; and Mason and Dixon, the same who subse- quently measured the arc of a parallel in America, were destined to Sumatra. Fortunately, they were so much delayed that, in their apprehension lest they might not arrive in season at their appointed station, they decided to observe at the Cape of Good Hope, a more desirable situation, as the event proved. The French Academy sent the astronomer Pingre to the island Rodrigues, a little more than 300 miles from Mauritius, in the Indian ocean. Le Gentil was to have observed at Pondicherry, but the war deprived him of the means, inasmuch as the ship containing his instruments was captured by the British. Another French astronomer, Chappe^ was sent by the St. Petersburg Academy of Sciences to Tobolsk, in Siberia, and a Russian astronomer, Rumowski, to Selinghinsk, near Lake Baikal, on the Mongolian frontier. Besides these regularly organized expeditions, astronomers were everywhere on the alert. Not only throughout Europe, but at the missionary stations of southern and eastern Asia, observations of the ingress and egress of the planet were made with all the care and nicety which circum- stances permitted. The various results deduced, there is no need of fully recapitulating here.^I They were far from harmonious, and led to much warm controversy, which, indeed, almost assumed the form of a national dispute. Short obtained, by different methods, different results between 8". 47 and 8". 67, and adopted the value 8". 65 as final. In a second memoir he arrived at the values 8".49 and 8".63. Pingre found, on the other hand, 10".l; Ruinowski, 8". 33; Hornsby, 9". 5 to 10"; Audifredi, ("Dadeius Ruffus,") 9J". To sum up, the transit of 1761 did not contribute much to our knowledge of the astronomical unit. The transit of 1769 promised better results for many reasons. The uncertainty of the values from the first transit stimulated to the greatest possible effort, which was also insured by the consciousness that more than a century must elapse before another similar opportunity would present itself; and beside all this, the transit itself was, upon the assumption that the most advantageous points for observation would be occupied, (as in fact they were,) still further more favorable than its immediate predecessor. Both ingress and egress were visible at numerous <» Mfm. de I'Acad. da Sciences, 1760, 93. f Theoria Luna;, §50, p. 50. jlbid., §51, p. 52 § Die Entfernung der Sorme von der Erde, ma dem Venusdurchgang von 761, hergdeitd von J. F. ENOKE Gotha 1822 || EN«KE, Enlf. d. Sonne, §5, pp. 11-32. U See, among others, SHORT, Phil. Tran8., 1762, p. 611 ; 1763, 300. PINGRE, Mem, del' Acad., 1761, pp. 413, 483 ; 1764, p. 339 ; 1765, p. 1. HOBNSBY, Phil. Trans., 1763, p. 467. RUMOWSKI, N™. Comm. Acad. Petrop. XI, Out. p. 41, Mfm. pp 83' *87' XI1' 875' PLANMANN' ^^.Akad.Handl.,\US, 118; 1764, 144. Phil. Trans., 1768, 107. ATOIFKEI.I, Investi- gaiio Parallax* Sulara, Rome, 1765. AUDIFBEDI, de Sola Parallaxi, Rome, 1766. INTRODUCTORY AND HISTORICAL. and widely remote points, which was not the case in 1761. Finally, an eclipse of the sun followed close after the transit, affording an excellent opportunity for fixing the longitudes of the places of observation. No exertions were spared by the votaries or protectors of astronomy for obtaining numerous and accurate observations, and as Encke has said,* with as much truth as delicacy, " whatever may be the future judgment as to the actual issue, posterity will never be able to reproach either the astronomers or the governments of that period with having neglected to call sufficiently careful attention to the more important points, or with having failed to further and support scientific efforts with sufficient readiness." No one will deny that the enlightened aid of national resources, and the generous enthusiasm of astronomers, were alike necessary for pro- viding those materials which, in the hands of the illustrious astronomer of Berlin, have furnished the definite value with which the world has been amply content for more than a quarter of a century, and which may not impossibly remain the standard for a quarter of a century to come. The observations and disquisitions called forth by this rare and now peculiarly important phenomenon are far too numerous for full citation. f The chief observations were collected by Lalande in a treatise, J from the abundant works in which they were made public, and these, with such as had been omitted there, are given in full detail in Encke' s classic investigation§ of this transit. The value of the parallax found by different astronomers from this transit of Venus are con- fined within much narrower limits than those from the former. The smallest was Planmann's, 8". 43 ; the largest Pingre's, 8".81, and Euler's, 8". 82 ; Hornsby found 8". 78, Lalande 8".50, Lexell 8".68, Smith 8".605, Maskelyne 8".723. The observations were subjected by Ferrer, in 1808, to a discussion, from which he obtained the value 8".615;|| and in 1815 to a very thorough investigation, posthumously published^ in 1832, and giving** 8".577 i 0".3 as the result. Meantime, however, had appeared the two books of Encke, already quoted ; the first published in 1822, containing an ample scrutiny of the observations of the transit of 1761, June 6, and deducing the final value 8".4905±0".607 ; and the second, published in 1824, giving a thorough criticism and discussion of the transit of 1769, June 3. In this latter he determines the amount of certain corrections, necessarily disregarded in the first treatise, and finally adopts the following results as final for the solar parallax. From the transit of 1761 8".5309 ± 0".0623. 1769 8".6030 ± 0".0460. From the two together 8".5776± 0".0370. Connected with the transit of 1769 are some circumstances which, from their historical importance, demand some allusion here. One of the most important points for the accuracy of the determination was the station at Fort Wardoehuus, on Wardoe, an island in the Arctic ocean, at the northeastern extremity of Norway. To this point the Danish government had sent a clergyman of Vienna, Father Hell, with two assistants, Sainovicz and Borgrewing. Numerous circumstances tended to throw suspicion on Hell's observations, which he had suppressed for nine entire months, regarding which he had repeatedly seemed to prevaricate, and which, when • Venusditrchffang von 1769, § 1. t Sufficient are the following memoirs: RITTENIIOCSB, Trans. Am. Phil. Soc. I. p. 89. SMITH, Trans. Am. Phil. Soc. I, p. 162. App. p 54. LALANDE, Mfm. de I'Acad. 1770, p. 9 ; 1771, p. f76. HORNSBY, Phil. Trans. 1771, p. 574. PiNGRE,J/i?m. del'Acad. 1770, p, 558; 1772, p. 398. LEXELL, Vetenskaps. Akad. llandl. 1771, pp. 200, 301. MASKELYNE, Phil. Trans. 1768, p. 55 ; 1769, p. 414. EULEB, Phil. Trans. 1772, p. 69. MASKELYXE, Trans. Am. Phil. Soc. I, p. 4. App. p. 1. PLANMANN, Vetenskaps. Akad. Handl. 1772, pp. 183, 358. J LALANDE, Mtmoire sur le Passage de Vfnus absent k 3 Juin, 1769, Paris ; 1772. §Der Vtnusdunhgang van 1769, Sfc., bearbeitel von 3. F. ENCKE, Gotha ; 1824. ||Proc. Am. Phil. Soc. VI, p. 355. ^Mem. R. Ast. Soc. V, p. 253. °o Mem. R. Ast. Soc. V. pp. 2.r>4, 282, 295. K o INTRODUCTORY AND HISTORICAL. submitted to the test of rigorous computation in combination with the rest, exhibited gross dis- cordances. Many circumstances, of which an account will be found in Encke's second treatise, combined to place Father Hell in a very unfavorable light, and several astronomers, prominent among whom was Lalande, did not hesitate to accuse him of having fabricated or changed his observations. Neither do his demeanor at the time, nor his published observations of the eclipse on the next day, tend to diminish the suspicion ;* and the cool investigationf of the case by Encke, after the lapse of considerably more than half a century, leaves his observations and his character under a heavy cloud. The long delay prior to making public his results seemed best explicable by his desire to obtain as many other observations as possible, in order subse- quently to give the most plausible figures as his own. Unfortunately for himself, he committed an error in computation,! which, like that of his counterpart, the Chevalier d'Angos, sufficed, under the rigorous scrutiny of the master Encke, to secure the ultimate detection of the untruth. In the year 1834, ten years after the publication of Encke's second treatise, Prof. Littrow, of Vienna, learned§ that some of the papers of Father Hell were in the possession of an Austrian * gentleman, the Baron von Miinch-Bellinghausen, into whose hands they had come after the death of his uncle, Baron von Penkler, who had been a zealous admirer and patron of Father Hell. In the hope of obtaining some clue to the celebrated Wardoehuus observations, Prof. Littrow asked permission to consult them, which was not only readily granted, but furnished occasion for the presentation of all Hell's MSS. to the Vienna observatory. Prof. 0. L. Littrow entered with care upon the investigation, and was rewarded by the dis- covery of Father Hell's astronomical note-book for the days June 2-4, 1769. Its contents, with other interesting documents, were soon printed, and appeared at the close of the year. They fully corroborate and justify previous suspicions. The chief figures, especially the times of entrance upon the solar disc, had been for the most part erased, and with a darker colored ink. Two other passages, the one relating to the observations of Sainovicz, the other to those of Borgre- wing, had been so thoroughly obliterated, that Prof. Littrow was only able to conjecture the three first letters of the one and the first and last letter of the other. From an investigation of such figures as remained legible and unaltered, he succeeded in finding one observation of the ingress by Borgrewing, and one of the egress by Hell, upon which reliance appears warran table. || The reasons given by Littrow, and unhesitatingly accepted by Encke, If are chiefly these. Although, in reply to Lalande, Father Hell had publicly offered to exhibit the original note- book, free from erasures, and giving the observations just as finally published by him, Littrow found both clear and undefaced documents containing the quantities as prepared for publication, and this note-book, which was as manifestly not designed for the press. It contains remarks, notes, and comments, in chronological order ; the hand-writing is unequal and frequently changing, observations never made public are here noted down, together with many jottings and memoranda which could not have been intended for the public. The important observations were chiefly obliterated, with great care and thoroughness, as were also sundry remarks con- cerning them. There can be no doubt that the evidence is sufficient to establish this note-book as being the identical one used at Wardoehuus, and that this establishment of identity discredits the published observations and the truthfulness of Father Hell, but provides few new figures upon which reliance may be placed. Encke submitted these new-found observations to careful scrutiny within a few months after their discovery. He found that had Father Hell not altered his observations of the eclipse, the times actually observed and originally recorded would harmonize, but that in his desire to • Sec SCHEIBEL, ArdeUung mi Mathematische Bucherhmntnut ; Slwk 4. App. to the 1st preface to 2d edition, f Venuidurchgang von 1769, pp. 17-20, 24-27. \Abh. d. Berlin. Acad. 1835, p. 305. § SCHUMACIIEB, Ast. Nachr. XII, p. 71. || Paler HELL'S Rate nach Wmdoe und seine Beott. de* Venwsdurclyangt in Jahre, 1769, von C. L. Lnrnow Wien ; 1835. fl Abh. der Berlin. Acad., 1835, p. 303. INTRODUCTORY AND HISTORICAL Ixvii publish better observations than he knew how to make, he had changed his record of the inomeut of commencement, after computing it by means of elements so erroneous that his published value was out by 40'. Kejectingall observations which had passed under the revision of Father Hell, except in those isolated instances in which the original notes were decipherable and intel- ligible, Encke redetermiued the longitude of Wardoehuus and thus obtained the means of correcting the original equations of condition for the transit of 1769 and solved them anew. This revised computation gave as the value resulting from the transit of 1769, 8".5931 ± 0".0460, being less by 0".01 than the previous determination from the same transit. Combining this, as before, with the value given by the transit of 1761, he found the mean value 8".57116 ± 0".0370, thus decreasing the former value by the comparatively unimportant amount 0". 00644. This last result has, since 1835, furnished the standard value for the parallax of the sun and corresponding to a mean distance from the earth of 2,406J terrestrial semidiameters or 82 719 316 equatorial miles.* Assuming with Encke, f the Toise de Perou as 6 394 564 feet, or what is equivalent, 1 statute mile = 825 701 toises, Bessel's determination:]: of the earth's dimensions, according to which the length of a quadrant is 5 131 179.81 toises, and the major semi-axis 3 272 077.14 toises, gives for the earth's mean distance from the sun in statute miles 95 360 000 ± 412 000. In 1824, the same year in which Encke's discussion of the transit of 1769 appeared, Professor Burg, like Mayer before him, deduced§ a value of the parallax from the lunar theory, and urged the employment of this method as capable of affording better results than those which could be anticipated from any other method earlier than the Percws-transit of 1874. Burg's value, resulting, of course, from a lunar theory more refined than was attainable in the time of Mayer, was 8". 62= ± 0".035. Laplace too, in the same manner, obtained|| the solar parallax from this equation as 26.58 centesimal seconds or 8". 61, a result thoroughly accordant with Encke's determination, and adds, "II est tres remarquable q'un astronome, sans sortir de son observatoire, en comparant seulement ses observations a 1'analyse, cut pu determiner exactement la grandeur et I'aplatissement de la terre, et sa distance au soleil et a la lune; elements dont la connaissance a etc le fruit de longs et penibles voyages dans les deux hemispheres. L'accord des resultats obtenus par ces deux methodes est une des preuves les plus frappantes de la gravitation universelle. ' ' A couple of years previous to the discovery of Father Hell's forgeries, Henderson, at the Cape of Good Hope, had made a series of observations^ of declinations of Mars, during the opposition of 1832, which he compared with simultaneous observations at Greenwich, (two instruments, the mural circle by Troughton, and that by Jones,) Cambridge, and Altona. The several resultant values** were 9".076, 9". 343, 8". 588, and 9". 028, and the final mean by weightsff gave him 9". 028. All these values are larger than either of Encke's adopted ones, and their great discordance precludes reliance upon any of them. The method proposed by Professor Gerling for obtaining a still closer approximation to the actual value of the solar equatorial parallax has been already developed, with full statements of its relative advantages, both by the astronomer who suggested itJJ and by the one under whose direction, the Astronomical Expedition to Chile was organized and carried out.§§ The history ° Berlin Aslr. Jahrb. 1852, p. 323. f DOVE, Moans und Metaen. p. 39. EMCKE, Berl. Ast. Ja/trb. lS52,j>. 321. t Astr. Nadir. XIX, 97. § Attr. Nachr. Ill, pp. 346, 348. || Systems du Monde, Liv. IV, (Euvret VI, p. 264. Tf Aslr. Nachr. X, p. 162. °o Astr. Nachr. XI, pp. 296, 404. ft Ibid. p. 404. Monthly Notices R. Astr. Soc. Ill, 39. J| Astr. Nachr. XXV, p. 363, XXVI, p. 195. Sjjj Intrcxl. to this volume, anil A. N. INTRODUCTORY AND HISTORICAL. of this enterprise has been given by Lieutenant Gilliss in the introduction to the present volume. * It now only remains to make use of the results of the expedition. §2.-GENERAL STATEMENT OF THE PROBLEM. The proof-sheets of the present volume III of the observations of the planets Mars and Venus, constituted the materials placed in my hands by Lieutenant Gilliss for the determination of the best value of the solar parallax which they would afford. The end to which he had devoted so much earnest and self-sacrificing effort, and for which he had labored so zealously through obstacles and disadvantages of almost every description, and the scrupulous care manifestly bestowed by him and the assistant astronomers upon the observations, demanded commensurate exertions for the deduction of the final result — an amount of labor uncontem- plated in the original plan of the observations, and necessarily entailing a delay of several months. The observations of Mars and Venus, made at the Santiago Observatory, by Lieutenant Gilliss, and under his direction, are in perpect conformity with the plan previously laid down, and consist of four series of micrometric comparisons, comprising two oppositions of each planet : The first series for Mars consists of observations on 46 different days, between 1849, Decem- ber 10, and 1850, January 31. The first for Venus contains observations on 51 different days, between 1850, October 19, and 1851, February 10. The second for Mars, observations on 93 days, from 1851, December 16, to 1852, March 15. The second for Venus, on 27 days, from 1852, May 29, to 1852, September 13. Making in all observations upon 2 IT days, extending over nearly three years. For combinining with these, according to the contemplated method, which requires a com- parison in declination with the same star, upon the same date at a northern observatory, correspondent observations were found as follows : By the Naval Observatory at Washington. Mars, I. series ; nine. Mars, II. series ; two. Venus, I. series ; eight. By the Royal Observatory at Greenwich. Mars, I. series ; four. By the Harvard Observatory at Cambridge. Mars, I. series ; Jive. In all, therefore, there were but twenty-eight! correspondent observations for both planets during these three years, eighteen of these being during the first Mars series, and two during the second ; while for Venus, the planet especially selected, there were eight during the first, and none during the second opposition. The details of these correspondent observations are as follows : 0 See Astr. Nachr. XXXI, p. 247, XXXIV, p. 340, XXXVI, p. 77. 1 The Washington observation of 1850, October 19, has been rejected by the advice of Mr. Ferguson. GENERAL STATEMENT OF THE PROBLEM. Ixix WASHINGTON OBSERVATIONS. Planet. Series. Date. No. of comparisons. Remarks of observer. North limb. South limh. 1849. Mars . .... I. Dec. 13 7 8 Planet disturbed and blazing ; star of comparison scarcely visible. 17 16 22 Three comparisons N. limb good. During remainder, planet blurred and restless. 27 20 22 Comparisons at times quite unsatisfactory. 31 12 13 Observations unsatisfactory. Planet and star blurred and tremulous. 1850. Jan. 9 7 7 Night misty ; star of comparison scarcely visible. 12 6 8 Planet blurred. Interrupted by clouds. 14 2 2 Night very unfavorable. 22 10 11 29 3 3 1850. I. Oct. 22 5 4 Disc tremulous, and not measurable within ten seconds. Nov. 1 4 4 Brown haze. 2 8 8 10 2 3 Three comparisons good, the rest unsatisfactory. 13 4 4 Night uncommonly fine; all the circumstances favorable, except the inequality of the external and interior temperatures. 14 4 4 21 10 11 Night clear and serene. 1851. Jan. 15 16 16 Planet flickering and undefined. 1852. Mars II. Jan. 24 5 7 Planet indistinct and blazing. Feb. 2 g 8 Toward end of observations planet blurred and uncertain. GREENWICH OBSERVATIONS. No. of comparisons. North limb. South limb. 1849. Mars I. Dec. 15 3 3 Passing clouds, the observations not good. 27 6 6 1850. Jan. 4 3 3 The star extremely faint and difficult to observe, the limbs of the planet badly defined. 7 3 3 Mars was very tremulous, and the star exceedingly faint. CAMBRIDGE OBSERVATIONS. No. of comparisons. North limb. South limb. 1849. Mare I. Dee. 17 4 0 High wind; atmosphere very much disturbed. 27 5 0 31 0 4 1850. Jan. 1 9 2 4 4 0 V. Ixx GENERAL STATEMENT OF THE PROBLEM. These are the only observations at hand for combining with the magnificent series of Lieu- tenant Gilliss, according to the method suggested by Professor Gerling, and contemplated by the expedition. It is impossible to refrain from the expression of deep regret that, from all the observations of the well equipped and richly endowed observatories of the northern hemisphere, so few materials could be found toward rendering available, according to its original purpose, an expedition to which so much labor and enthusiasm had been consecrated, and to which an accomplished observer, already known for the precision of his measurements, had devoted his entire energies during so long a sojourn ; moreover, after the preparation and wide dissemina- tion of ephemerides and charts of the comparison stars for both the planets during the whole period. The deduced corrections to Encke's values of the solar parallax corroborated the inferences deducible from the notes, and made palpable the necessity for a recourse to some other method, than the desired one of correspondent observations. These corrections, of which the detailed computations will be given, have been found to result as follows, from the correspondent obser- vations already cited : . COKKECTTONS TO ADOPTED SOLAR PARALLAX RESULTING FROM CORRESPONDENT OBSERVATIONS. I. Washington and Santiago. Date. Air. Date. **. 1849. it 1850. it Mars Dec. 12 +1 .445 Venus . Oct. 19 + [18.2641 12 +2.928 22 + 0.341 17 +0.113 Nov. 1 + 1.214 27 +0.497 2 + 1.051 31 +2.144 10 + 0.930 1850. 13 + 1.236 Mare . . . . Jan. 9 —2.462 14 + n i A*i \J ,i(yt 12 +0.534 21 — 0.182 14 —0.026 1851. 22 +1.266 Jan. 15 + 0.377 29 +1.390 1852. Jan. 24 0.482 Feb. 2 +0.247 II. Greenwich and Santiago. Date. 4ar, Date. Jar. Mare 1849. Dec. 15 a —0.574 1850. II 27 —0.598 7 1.636 HI. Cambridge and Santiago. Date. AT*. Date. 4». Mare 1849. Dec. 17 ii —0 069 Mars 1850. a 27 31 —0.189 +0.148 4 +0.917 —0.375 The large mean error, and striking non-accordance of these results, renders any reliance upon them impossible ; and the only course remaining has been to make use of the largest GENERAL STATEMENT OP THE PROBLEM. possible number of observations of every kind in each hemisphere, and to trust to the accumu- lation of observations for eliminating the inaccuracies due to erroneous assumptions in the adopted positions of the comparison stars, and to the unavoidably large mean error of the meridian declinations. This course has been pursued, and, without any attempt to refute the objections which may fairly be urged, the present discussion aims simply at deducing the best result from the materials at hand, in the hope that whatever be the degree of trustworthiness attributed to the final determination, this discussion may at least claim to have been based upon the best available data, and to afford, for the result of previous research, the always welcome corroboration which is furnished by different observations and different methods of investi- gation. The observations available for this purpose are as follows : At Santiago 55 micrometric comparisons of Mare, I series. 89 do. do. II series 79 meridian observations do. II series 56 mierometric comparisons of Venus, I series 72 meridian observations do. I series 27 micrometric comparisons do. II series 46 meridian observations do. II series At "Washington 23 micrometric comparisons of Mars, I series 5 do. do. II series 16 do. of Venus, I series 6 do. do. II series At Greenwich .... . ... 8 micrometric comparisons of Mars, I series 24 meridian observations do. I series 36 do. do. II series 17 do.. of Venus, I series 17 do. do. II series At the Cape of Good Hope .... 47 micrometric comparisons of Mars, I series 47 meridian observations do. I series 46 do. do. II series At Cambridge 19 micrometric comparisons of Mars, I series At Athens 38 meridian observations do. I series At Cracow 16 do. of Venus, II series At Kri-msmiinster 13 do. of Mars, II series At Altona 2 do. of Venus, II series A few of these meridian series have been included up to dates somewhat beyond the proper limits, especially when their reduction showed a mean error sufficiently small to warrant the hope of attaining increased accuracy by their employment. A series consisting of five obser- vations of Mars II. at Cracow, only one of which was within the limits of the Santiago obser- vations, were omitted in consequence of the mean error coming out as over 3". A large part of the Cambridge observations were inapplicable for combination with those at Santiago on account of the observations being confined to a single limb, and still others are incapable of employment on account of the smallness of the comparison star employed, entailing, naturally, an impossibility of identification in any of the catalogues. Observations of right-ascension only are utterly without avail for our purpose. The Greenwich observations were obtained from the annual volumes of the Koyal Observatory, and are, with few exceptions, solely meridional, conformably to the established usage of the observatory. The only method which remains for making use of these observations to deduce a value of the parallax, is to obtain the declinations of the several comparison stars as well as possible, and with these to endeavor to elicit from the series of differential observations, with equatorial instruments, sufficiently numerous determinations of the planet's declination, at both northern and southern observatories, to authorize the hope that the inaccuracies of the individual star positions may possibly disappear from their combined result. The results of these differential measurements would then be used like determinations of absolute position. The meridian observations at Santiago and Greenwich could be incorporated, with their appropriate weights, so that every observation would be made to contribute to the final result. Ixxii GENEKAL STATEMENT OP THE PROBLEM. The problem before us is then to be distinctly understood as follows : The failure of northern observatories to afford the means necessary for rendering the materials accumulated by Lieu- tenant Gilliss, at Santiago, serviceable for their intended purpose, or, indeed, for testing the method contemplated, renders the desired computations impossible, and their expected results unattainable, so far as these relate to the measurement of the parallax, although, of course, of the highest value for such purposes as demand no corresponding observations elsewhere. And what is now proposed is, to combine whatever other contemporaneous observations are at hand with those of Santiago in such manner as to deduce a resulting value for the parallax, without claiming for the results any peculiar pre-eminence, or for the method the advantages which would result from the original plan. Should the value of the solar parallax thus obtained coincide with Professor Encke's value, within the limits indicated by the probable errors, the corroboration thus afforded by a method so widely different will not be without essential importance ; while, in the event of the resulting value differing from that furnished by the transit of 1769, the questions and investigations to which the discordance would give rise could not fail to be of great usefulness. §3.-METHOD PURSUED. Ephemerides of Mars and Venus being computed for the two oppositions with all the precision which Lindenau's tables permit, the several declinations found at the several observatories are to be compared with the ephemeris after the requisite corrections for defective illumination have been applied. Each of the residuals will then afford an equation containing the following unknown quantities : 1. The semi-diameter at the unit of distance, which we call ? = ?o + ^ (, where ?„ denotes the assumed value. The quantity f appears only in its function, the apparent semidiameter, or A denoting, as usual, the distance of the centre of the planet from the centre of the earth, and i denoting any spurious apparent extension of the semidiameter. 2. The irradiation, i, assumed to be of the form *=A***% of which the term t'j is peculiar to the observer and the instrument. 3. The correction q for the personal equation of the observer, and for the thickness of the threads of the filar micrometer, the influences of these two sources of error becoming inseparable. 4. The correction p to the adopted value of a revolution of the micrometer-screw. 5. The correction of the ephemeris in declination (A 3J = « + p T + r r% T being the time elapsed since the epoch T, assumed near the middle of the series. 6. The sun's equatorial horizontal parallax, which we will put (o-o denoting Encke's value ^'.STUG,) and which appears only in its function p = k*i where k signifies the ordinary coefficient for the error in parallax dependent upon the declina- tion, the hour-angle, the distance, and the geocentric latitude— i. e., if 0be the siderial time. p , sin. (3 — r) -- L sin. y + cz + dt-r-c where ra = (J0 ±£ ?. + * ""o — 3 a= +1 x = a. b = ^(t-T) y = 20 ,9 c = T^(t — Ty z=iooor Of the eight terms composing the second member of this equation, the first consists of known quantities, the next three, together with the last, are independent both of the instrument and the observer, while t, u, and v are entirely local in their character. For errors in the adopted star-places, of course no provision can be made, such errors combining with the errors of obser- vation. In the equations for those observations in which (as should, of course, be the case, at least with Mars,) the comparisons of the two limbs are nearly equal in number, and their means nearly contemporaneous ; the terms containing t and u are eliminated from the resultant comparison of the centre, and may be applied exclusively to the determination of the diameter, and of the law and magnitude of the constants of irradiation. So, too, will the term /v be necessarily omitted from the equations derived from observations not given with sufficient detail. And, finally, the three terms dependent upon the error of the ephemeris would also have been elimi- nated from those pairs of " correspondent" observations, for which it was the aim of the expe- dition to provide materials, and by which each couple of comparisons with the same star, at nearly the same time, in both a northern and a southern latitude, would furnish an independent value for the solar parallax. The simple course thus indicated has been pursued in the present discussion, and appears to be the only method practicable. Some of the more delicate refinements of reduction and com- putation are necessarily excluded ; but the question may well be raised whether, under the peculiar circumstances of the case, these would have added to the precision of the result had their application been possible. To insure as great accuracy as possible for the data, the published observations, wherever, and by whomsoever made, have been reduced anew ; beginning with the crudest form in which they are accessible, and although the Santiago observations were furnished by Lieutenant Gilliss in the printed sheets, as already prepared for the present volume, he has also courteously given full access to the original manuscript note-books for all observations directly or indirectly employed in these computations. Those observations which have been found available, and are employed in the discussion, are shown in the annexed table, which gives the places of observation and the number of observations of each planet diiring each series at the respective places. Ixxiv METHOD PURSUED. Available observations. Place. Instrument. Mars I. Mars II. Venus I. Venus II. Total. 55 89 56 27 227 Santiago .... 79 72 46 197 Washington . . . Equatorial 22 8 5 16 6 49 8 Greenwich .... 24 36 17 17 94 49 49 Cape of Good Hope . 47 46 _ _ 95 Cambrid e 19 _ _ 19 38 _ 38 Kremsmtinster . . Mer. circle 19 2 - 19 2 _ 16 16 111 60 35 39 245 151 214 128 73 568 In oil ... 364 274 163 112 813 For each of the eleven series of equatorial observations, the comparison stars are to be deter- mined in order to obtain absolute positions from the relative measurements. Those meridian observations are to be referred to the same category, which are essentially differential compari- sons, and, in fact, dependent upon a micrometer. In such cases the relative measurement is almost always accompanied by an observation of the absolute position of the comparison star, wbich observation is to be used with such other determinations as may be accessible for deriving a final and adopted place from the mean of all, taken by weight. These absolute positions may then be combined directly with the meridian observations, and we shall then obtain one resultant normal equation for each series and each place of observation, the coefficient/ having different signs at the 7 northern and the 2 southern observatories, respec- tively. Of these normal equations there will be For Mars, I series, 6 For Venus, I series, 4 " II series, 4 " II series, 4. The terms containing t, u, and v, must, necessarily, be eliminated from the normals before these can be combined for solution. To this end, they may, in most cases, be approximately determined by means of a different combination of the data employed, and indeed the value of V being independent of the object observed, it may be advantageously deduced from the conjoint use of different series of observations. The only unknown quantities will then be x, y, z, and w, the first three being necessarily different for each of the four series. The means of the several comparisons which constitute a single observation may, by a slight artifice, be so corrected that the influence of the second differences of the parallaxes belonging to these comparisons will be obviated without entailing the necessity of any reduction of the comparisons singly. The period over which the largest series extends is but about five hours, and in all the Santiago observations, which are the only ones sufficiently prolonged to call for any consideration of this point, the comparisons follow one another at intervals so nearly equi- distant that we may assume these intervals to be equal without thereby introducing any appreciable error into the correction. Putting, as before, the observed apparent declination of the limb — 8 computed true declination of the center = d0 parallax in declination =p semi-diameter — r METHOD PURSUED. IxXV and analogously, the stars observed apparent declination = d " true " " =d0 we shall have d — d= 3.— d,—p±r + R where R represents the difference of the refractions of the limb and the star, and has always the same sign as 3a — d0. If we denote by C the sum of the corrections in declination due to the assumed tabular elements, (assumable as constant during any one night's work, and employ s, the mean error, in the stead of the unknown error actually incurred in each individual comparison, we shall have the observed difference of declination between planet and star J3 = 3— d + C— s = 3.-d.—p±r + B + C—* one equation of this form being furnished by every comparison. Indicating the time to which the comparison belongs by a subjacent letter annexed to the respective symbols, we have for the time, t, of any one comparison A3,= 8at — e2ot — Pt± r,+ R, + <7 + s and so for a given time near the middle of the series, T, AS, = «J.T —d0—pT ± r, + ^r + G + e. The difference of these two equations, when developed in series according to the powers of t— T=T is V> — $*• A* , r ±|r»D» Let us now take for the time T, the mean of the times of the several individual comparisons, so that nT=t' + t" + t'" + ..... t(n} arid put n /»„» = MaV + JoV + Jo> + ..... ^.t w The mean of all the equations furnished by the individual comparisons will be identical with the mean of all the observed equations after subtracting J3oT . All the terms of the first order will have disappeared ; and the resulting equation will present the form Of the two terms which constitute the first member of this equation, Jdotn is the (given) arith- metical mean of the observed differences in declination, and J respectively. If we represent that part of the expression which is constant for the same place by f, we may write Adopting Bessel's value of the eccentricity of the terrestrial spheroid, so that log. e = 8.9122052, we have, by the ordinary formulas, (Be.rl. Astr. Jalirb. 1852, p. 325,) P sin f' = gLiLriijgjigjL V 1 — ea sina if /*C08C,'= . aCOS

which is con- stant for the observatory ; and c the constant used in reducing the sidereal time to mean Wash- ington time by means of the sidereal time at Greenwich mean noon, given in the London Nautical Almanac — being the longitude east from Washington, added to the reduction to mean time which belongs to the longitude from Greenwich. §4. EPHEMERIDES AND AUXILIARY TABLES. The ephemerides here given are derived from Lindenau's tables of Mars and Venus, and comprise the entire period of Lieutenant Gilliss's observations of each of these planets. Inasmuch as the employment of the ephemerides is, in fact, only differential in character, it did not appear necessary to incorporate the recent modifications and improvements of Lindenau's tables, given by Breen and Peirce. They are consequently accordant with the Nautical Almanac and Berlin Jahrbuch . The approximate values which have been employed for the semi-diameters at the unit of distance from the earth are — For Mars, t = 4". 66393, (Oudemans, Astron. Nachr. XXXV, 351.) For Venus, ? = 8".6625, (Wichmann, Astron. Nachr. XXXII, 74.) The ephemerides for the two oppositions of Mars, and the two inferior conjunctions of Venus, here follow in their order. Ixxviii KPHEMERIDES AND AUXILIARY TABLES. Ephemeris of Mars for the first series, or opposition of 1849-50. Washington Jli-nn IVoon. All. . 1 )rui'. «. 8. log. A. r. Def. limb O log. cos 0. 1 « |5rseco. n « cos $_ Ino. 1849. A. m. t. . /f // „ s. Oct. 30 6 24 13.36 +24 12 36.5 9.8608773 6.42 1.22 0 00 p. n. 9.96002 0.47 31 24 44.78 14 51.9 .8574961 6.48 1.20 0.00 p. n. .95989 0.47 Nov. 1 25 12.94 17 10.9 .8541218 6.53 1.17 0.00 p. n. .95976 0.48 2 25 37.74 19 33.4 .8507568 6.58 1.14 0.00 p. n. .95962 0.48 3 25 59.14 21 59.7 .8474035 6.60 1.12 0.00 p. n. .95948 0.48 I 26 17.09 24 29.9 .8440644 6.68 1.11 0.00 p. n. .95934 0.49 5 26 31.49 27 3.9 .8407421 6.73 1.08 0.00 p. n. .95923 0 49 6 26 42.37 29 41.8 .8374392 6.78 1.05 0.00 p. n. .95904 0.50 7 26 49.61 32 23.8 .8341584 6.83 1.04 0.00 p. n. .95889 0.50 8 26 53.18 35 9.8 .8309032 6.88 1.02 0.00 p. n. .95872 0.50 9 26 53.02 37 59.6 .8276770 6.91 0.99 0.00 p. n. .95856 0.51 10 26 49.10 40 53.3 .8244831 6.99 0.96 0.00 p. B .95840 0.51 11 26 41.39 43 50.8 .8213252 7.04 0.93 0.00 p. n. .95822 0.52 12 26 29.83 46 52.0 .8182069 7.09 0.90 0.00 p. n. .95805 0 52 13 26 14.39 49 56.8 .8151317 7.14 0.87 0.00 p. n. .95786 0.52 14 25 55.08 53 5.0 .8121042 7.19 0.84 0.00 p. n. .95769 0.53 15 25 31.87 56 16.3 .8091278 7.24 0.81 0.00 p. n. .95749 0.53 16 25 4.77 59 30.6 .8062088 7.29 0.78 0.00 p. n. .95730 0.54 17 24 33.78 25 2 47.6 .8033490 7.34 0.74 0.00 p. n. .95711 0.54 18 23 58.91 6 7.1 .8005538 7 38 0.70 0.00 p. n. .95691 0.54 19 23 20.18 9 28 7 .7978275 7.43 0.68 0.00 p. n. .95671 0.55 20 22 37.61 12 52.0 .7951747 7.47 0.61 0.00 P. 8. .95652 0.55 21 21 51.22 16 16.8 .7925995 7.52 0.60 0.00 p. 8. .95631 0.55 22 21 1.08 19 42.7 .7901061 7.56 0.57 0.00 p. s. .95611 0.56 23 20 7.22 23 9.1 .7876991 7.60 0.54 0.00 p. s. .95590 0.56 24 19 9.70 26 35.6 .7853827 7.65 0.55 0.00 p. 8. .95569 0.56 25 18 8.58 30 1.9 .7831613 7.68 0.46 0.00 p. s. .95549 0.57 26 17 3.93 33 27.4 .7810394 7.72 0.41 0.00 p. s. .95528 0.57 27 15 55.83 36 51.5 .7790213 7.76 0.39 0.00 p. s. .95508 0 67 28 14 44.37 40 13.7 .7771113 7.79 0.36 0.00 p. s. .95487 0.58 29 13 29.64 43 33.8 .7753134 7.82 0.33 0.00 p. s. .95467 0.58 30 12 11.75 46 50.9 .7738317 7.85 0.30 0.00 p. 8. .95147 0.58 Dec. 1 10 50.81 50 4.6 7720698 7.88 0.27 0.00 p. s. .95427 0.58 2 926.96 53 14.4 .7706328 7.91 0.26 0.00 p s. .95408 0.59 3 8 0.32 56 19.6 .7693245 7.93 0.22 0.00 p. S. .95389 0.59 4 6 31.05 59 19.8 .7681485 7.95 0.20 0.00 p. S. .95370 0.59 5 4 59.29 26 2 14.3 .7671087 7.97 0.16 0.00 p. s. .95353 0.59 6 3 25.21 5 2.6 .7662083 7.99 0.13 0.00 p. 8. .95335 0.59 7 1 48.94 7 44.3 .7654509 8.00 0.11 0.00 p. s. .95319 0.59 8 6 0 10.74 10 18.8 .7648398 8.01 0.09 0.00 p. s. .95302 0.60 9 5 58 30.79 12 45.7 .7643774 8.02 0.07 0.00 p. S. .95287 0.60 10 56 49.32 15 4.6 .7640662 8.03 0.05 0.00 p. s. .95272 0.60 11 55 6.52 17 15.2 .7639086 8.03 0.04 0.00 p. 8. .95259 0.60 12 53 22.61 19 17.1 .7639066 8.03 0.03 0.00 p. s. .95246 0.60 13 51 37.81 21 9.9 .7640617 8.03 0.02 0.00 p. s. .95235 0.60 14 49 52.39 22 53.3 .7643747 8.02 0.01 0.00 p. s. .951224 0.60 15 48 6.59 24 27.4 .7648457 8.01 0.01 0.00 p. s. .95214 0.60 16 46 20.63 25 52.1 .7654747 8.00 0.00 0.00 p. s. .95205 0.60 17 44 34.76 27 7.4 .7682618 7.99 0.00 0.01 P. 8. .05197 0.59 18 42 49.22 28 13.1 .7672065 7.97 0.01 0.00 f. S. .95190 0.59 19 41 4.26 29 9.3 .7683075 7.95 0.01 0.00 f. S. .95184 0.59 20 39 20.10 29 56.1 .7695631 7.93 0.02 0.00 f. S. .95179 0.59 21 37 36.97 30 33.8 .7709712 7.90 0.02 0.00 f. s. .95176 0.59 22 35 55.07 31 2 6 .7725294 7.87 0.03 0.00 f. s. .95173 0.59 23 34 14.61 31 22.8 .7742354 7.84 0.01 0.00 r. s. .95171 0.53 24 32 35.81 31 34 6 .7760863 7.81 0.05 0.00 f. s. .95170 0.58 25 30 58.87 31 38.5 .7780789 7.77 0.06 0.00 f. s. .93170 0.58 26 29 23.96 31 34.7 .7802096 7.74 0.07 0.00 f. S. .95170 0.58 27 527 51.23 +26 31 23.6 9.7824749 7.70 0.08 0.00 f. F. 9.95171 0.57 EPHEMERIDES AND AUXILIARY TABLES. Ephemeris of Mars for the, first series — Continued. Washington Mean Noon. Ixxix Date. a. d. log. A . r. Jh. Del', limb. log. cos f) . 1 S In U cos. 1 It a it Feb. 9 8 5 6.97 +24 48 14.6 9.8433597 6.69 0.14 0.03 f. 9.95797 0.49 10 3 49.60 50 43.8 .8458776 6.65 0.16 0.03 f. .95782 0.49 11 8 34.97 52 58.4 .8484987 6.61 0.18 0.03 f. .95769 0.49 12 1 23.18 54 58.6 .8512188 6.57 0.20 0.03 f. .95757 0.48 13 8 0 14.33 56 44.7 .8540339 6.53 0.22 0.03 f. .95747 0.48 14 7 59 8.51 58 17.0 .8569397 6.48 0.24 0.03 f. .95737 0.48 15 58 5.79 94 59 35.5 .8599321 6.44 0.25 0.03 f. .95730 0.47 16 57 6.26 25 0 40.5 .8630070 6.39 0.27 0.03 f. .95724 0.47 17 56 9.97 1 32.4 .8661602 6.35 0,29 0.03 f. .95719 0.47 18 55 16.98 2 11.4 .8693875 6.30 0.31 0.03 f. .95715 0.46 19 54 27.33 2 37.8 .8726847 6.25 0.33 0.03 f. .95712 0.46 20 53 41.07 2 52.0 .8760473 6.20 0.35 0.03 r. .95711 0.46 21 52 58.22 S 54.3 .8794711 6.16 0.37 0.03 r. .95711 0.45 22 52 18.80 2 44.9 .8829520 6.11 0.39 0.03 f. .95712 0.45 23 51 42.83 2 24.2 .8864859 6.06 0.41 0.03 t. .95714 0.45 24 51 10.32 1 52 5 .8900685 6.01 0.43 0.03 r. .95717 0.44 25 50 41.26 1 10.1 .893E958 5.96 0.45 0.03 r. .95721 0.44 26 50 15.65 25 0 17.3 .8973641 5.91 0.48 0.03 r. .95726 0.43 27 49 53.46 24 .">'.) 14.5 .9010698 5.86 0.50 0.03 f. .95732 0.43 28 49 34.66 58 1.9 .9048094 5.81 0.53 0.03 r. .95739 0.43 29 49 19.24 56 39.8 .9085796 5.76 0.55 0.03 f. .95747 0.42 Mar. 1 49 7.16 55 8.5 .9123771 5.71 0.57 0.03 r. .95756 0.42 2 48 58.38 53 28.3 .9161986 5.66 0.58 0.03 f. .95766 0.42 3 48 52.85 51 39.4 .9200413 5.61 0.59 0.03 r. .95777 0.41 4 48 50.53 49 42.0 .!H39036 5.56 0.60 0.03 r. .95788 0.41 5 48 51.39 47 36.3 .9277799 5.51 0.60 0.03 r. .95800 0.40 6 48 55.38 45 22.6 .9316708 5.46 0.61 0.03 r. .95813 0.40 7 49 2.44 43 1.0 .9355728 5.41 0.62 0.03 r. .95827 0.40 8 49 12.51 40 31.8 .9394838 5.36 0.62 0.03 f. .95841 0.39 9 49 35.56 37 55.0 .9434017 5.31 0.63 0.03 f. .95856 0.39 10 49 41.54 35 10.8 .9473246 5.27 0.65 0.03 r. .95872 0.39 11 50 0.41 32 19.5 .9512505 5.22 0.66 0.03 f. .95889 0.38 12 50 22.11 29 21.1 .9551776 5.17 0.67 0.03 r. .95906 0.38 13 50 46.60 26 15.7 .9:i91043 5.12 0.68 0.03 f. .95936 0.37 14 51 13.82 23 3.3 .9630290 5.08 0.69 0.03 r. .95942 0.37 15 51 43.73 19 44.2 .9669501 5.03 0.69 0.03 f. .95961 0.37 16 52 16.28 16 18.5 .9708659 4.99 0.70 0.03 r. .95980 0.36 17 52 51.42 12 46.1 .9747748 4.94 0.70 0.03 f. .96001 0.36 18 53 29.10 9 7.2 .9786755 4.90 0.71 0.03 r. .96021 0.38 19 54 9.27 5 21.8 .982.5666 4.85 0.72 0.03 f. .96043 0.35 20 7 54 51.88 +24 1 30.1 9.9864469 4.81 0.72 0.03 f. 9.96064 0.35 EPHEMERIDES AND AUXILIARY TABLES. Epliemeris of Venus far the first series, or inferior conjunction of 1850-51, Washington Mean Noon. Date. a. 3. log. A. r. log. cos §. 1 24 2.7 .4786323 28.77 .98411 1.99 13 17 42.08 17 20.9 .4751580 29.00 .98435 2.00 14 15 22.95 11 7.9 .4720657 29.21 .98456 2.02 15 12 58.39 5 23.8 .4693721 29.39 .98476 2.03 16 10 29.18 15 0 9.0 .4670919 29.55 .98494 2.04 17 7 56.12 14 55 23.5 .4652377 29.68 .98510 2.05 18 5 30.09 51 7.2 .4638199 29.77 .98525 2.05 19 2 42.02 47 19.9 .4628470 29.84 .98537 2.06 20 8 0 2.86 44 1.4 .4623345 29.88 .98548 2.06 •Jl 7 .17 23.54 41 11.4 .4438553 29.88 .98557 2.06 22 51 45.03 38 49.5 .4636392 29.85 .98566 2.06 23 52 8.29 36 55.2 .4634732 29.80 .98571 2.05 34 49 34.38 35 28.0 .4647517 29.71 .98576 2.05 25 7 47 3.90 +14 34 27.1 9.4664665 29.59 9.98580 2.04 EPHEMEEIDES AND AUXILIARY TABLES. Epliemeris of Venus for the second series — Continued. Washington Mean Noon. Ixxxv Date. «. d. log A. r. log cos (7. l=r*™3. 1852. A. m. s. • / // a t. July 26 7 44 :. +14 33 51.8 9.4686071 29.45 9.98581 2.03 27 42 17. .-,1 33 41.3 .4711603 29.27 .98583 2.02 28 40 3.13 33 54.7 .4741106 29.07 .98581 2.00 29 37 55.60 34 30.9 .4774406 28.85 .98579 1.99 30 35 55.58 35 28.7 .4811314 28.61 .98576 1.97 31 34 3.64 36 47.1 .4851627 28.35 1.95 Aug. 1 32 20.26 38 24.8 .4895135 28.06 .98567 1.93 2 30 4:...- !l 40 20.5 .4941620 27.76 .98560 1.9] 3 29 20. NS 42 33.0 .4990861 27.45 .98553 1.89 4 28 5. 50 45 0.7 .5042636 27.13 .98545 1.87 5 26 59.96 47 42.2 .5096723 26.79 .98536 1.85 6 26 4.40 50 36.2 .5152906 26.45 .98526 1.82 7 25 18.90 53 41.1 .5210975 26.10 .98516 1.80 8 24 43.50 14 56 55.4 .5270726 25.74 .98505 1.78 9 24 18.18 15 0 17.7 .5331963 25.38 .98493 1.75 10 24 2.85 3 46.3 .53Si:,l II 25.01 .98482 1.73 11 23 57.40 7 19.8 .5458175 24.65 .98470 1.70 12 24 1.69 HI 56.8 .Mtaft 24.29 .98457 1.68 13 24 15. 14 35.9 .6588968 23.92 .98445 1.65 14 24 38.88 18 15.5 . 1393 23.56 .98432 1.63 IS 2T) 11.38 21 54.2 .5721067 23.20 Mas 1.60 16 •_>.-, 52. K> 2.-, 30.5 .5788168 22.85 .98407 1.58 17 26 43.06 29 3.2 .5855585 22.50 .98395 1.56 18 27 41.78 3-J 30.9 .5923220 22.15 .98382 1.53 19 28 48.78 35 52.3 .5990984 21.80 .98370 1.51 20 30 3.81 39 6.2 .60S8T85 21.47 .98359 1.49 21 :il 26.62 42 11.2 .6126579 21.13 .98348 1.46 22 32 56.97 45 6.2 .6194266 20.81 .98338 1.44 23 34 34.C.4 47 50.1 .6261791 20.49 .98328 1.42 24 X 19.39 50 21.5 .6329106 20.17 .98319 1.40 25 38 10.98 52 39.4 .6396153 19.86 .98310 1.38 26 40 9.17 54 42.8 .6462889 19.56 .98303 1.36 27 42 13.74 56 30.6 jfsusm 19.26 .98297 1.34 28 44 24.47 .W 1.7 .6595264 18.97 .98291 1.32 29 46 41.14 15 59 15.2 .6660828 18.69 .96887 1.30 30 49 3.55 16 0 10.2 .67-'. 18.41 .98284 1.28 31 51 31.47 0 45.7 .6790557 18.14 .98282 1.26 Sept. 1 54 4.70 1 0.9 .6854669 17.87 .98281 1.34 •2 56 43.03 0 55.0 .6918250 17.61 .98281 1.22 3 7 59 26.26 16 0 27.3 .6981281 17.36 .98983 1.20 4 8 2 14.19 15 59 37.0 .7043746 17.11 .98285 1.19 5 5 6.62 58 23.4 .7105631 16.87 .98291 1.17 6 8 3.36 56 45.9 .7166925 16.63 .98296 1.15 7 11 4.23 54 43.9 .7227618 16.40 .98303 1.14 8 14 9.05 52 16.9 .7287702 16.18 .98312 1.12 9 17 17.6:, 49 24.5 .7347174 15.96 .98322 1.11 10 20 29.84 46 6.1 .7406030 15.74 .98334 1 09 11 2.1 1 .'1.4 .7464268 15.53 .98348 1.08 12 27 4.3S 38 9.9 '1888 15.33 .9K362 1.06 13 30 26.41 33 31.3 :,:;, 15.13 .98379 1.05 14 33 51.42 28 25.4 ,vaH3 14.93 .oean 1.03 15 37 19.26 22 52.0 .7691064 1-1.74 .98416 1.03 16 40 49.80 16 50.7 •MB 14.58 1.01 17 8 44 22.91 +15 10 21.5 9.7800817 14.37 B.984SB 0.99 Ixxxvi EPHEMERIDES AND AUXILIARY TABLES The defect of illumination in right-ascension and declination may be readily obtained upon the admissible assumptions that the planet is spherical and illuminated by parallel solar rays. We are to compute the corrections to the measurements by a micrometer, the threads of which represent hour and declination-circles, and are tangent to the defective limbs at the points h and d, respectively. The illuminated portion of the planet is separated from the other half by a plane perpendicular to the line from the sun to the planet, and its visible boundary will he projected upon the plane of the apparent disc as a semi-ellipse. The plane is horned or gibbous, according as the planetocentric angle between earth and sun is more or less than 90°; and the unilluminated portion of the solar disc is, in each case, upon that side of the planet from which the sun is more than 180° distant — this geocentric angular distance being counted from the centre of the planet toward either side. Employing r, as heretofore, for the apparent semidiameter of the planet., and denoting the semiaxes of the ellipse by a and b, we have r =. a. And representing, in the plane triangle Sun-Earth-Planet,, the two first angles by the initial letters of the respective bodies, we may assume, without appreciable error, b = rcos(S+ E) an expression which gives to the minor semiaxis a negative sign when the visible ellipse is unilluminated — i. e., the planet horned. Denoting now the geocentric longitude, right-ascension, and declination of the sun, by L,A,D, the geocentric right-ascension and declination of the planet by a, d the heliocentric longitude and latitude " " A, ft all of which quantities may be directly taken from the ephemerides — we have the equations cos S= — cos /3 cos (P — L} cos E = sin d sin D + cos 8 cos D cos (« — A) sin E cosp =: — cos 3 sin D + sin d cos D cos (a — A) sin E sin p =2 — cos D sin (« — A) It is evident that the angle p is equal to the angle made with the semiaxis a by the tangent at d, or to the complement of that made by the tangent at h. The first equation may also be written S=180° + L — P. + 2 sin2^ /3 cotg (L — P) and of the three angles S, E, p, the first two determine the magnitude of the ellipse, and never exceed 180°, while the last, counted like other angles of position from north through east round to the semiaxis 6, fixes its position. A convenient mode of computing the angles .E'and p is afforded by the employment of auxili- ary quantities g and G ; so that g sin G=:cos D cos (a — A) g cos G = sin D tan » := ^ / g cos (G -\- 3) cotg E = tan (G -f- 3) cos p. The general expression for the tangent of the angle included between a tangent to the ellipse and its major axis is 1) u = -X— a?y and the distance between the centre of the ellipse and the point where this tangent intersects the major axis is — • Hence we have x at the point h cotg p = — . — aa y' at the point d tan » = ^! ^L. ~ a?' y" EPHEMERIDES AND AUXILIARY TABLES. and transforming to oblique coordinates xl and yl parallel to the hour and declination circles, oa a2 . Xl = d ' C°SP ' Vl ~ W ' Sm P' or eliminating ocf and a/' by the equation of the ellipse a2 62 = i2 a? + a2 y5 xf =2 a? cos2 p -\- b2 sin2 p. yf = a2 sin* p + 62 cos2 p. in which the substitution of the values a =z r, b = cos (8 -\- E) give o>i = rVl — sin2 j5 sin2 (# + E) yl = rV I — cossp sin8 (S + E) which, being subtracted from the semidiameter, give the defect of illumination da cos 3 = r — xt = r (1 — VI — sin2^ sin2 (S + E), 48=r — yl = r (I — V I — cos2 p sin2 (S + E), For the preliminary correction in parallax we have, as usual, / IT p COS Iff • ia -v a — a = — _ 2 • C - L. sm(0 — a) A cos 8 . . A sin C in which a' and # denote the geocentric places, and ^ is the auxiliary angle tan £ — tan iff sec (0 — a) The second equation may be written, ff — o — — ^? p sin iff (sin 5 cotg £ — cos d) =. — — | p cos ^' sin 8 cos (0 — «) — ^> sin ^' cos 8 > x cos 8 x1 sin 607 11.7.50 nO. 96677 2.49 679 207 569 g 20 1.36286 n-957 210 nO. 97246 ^ 2.57 * 21 1.36959 12.167 nO. 97799 2.66 665 214 536 10 33 1.37624 12.381 nO. 98335 2.76 655 216 517 10 23 12'597 2,9 »0.98853 49g 2.86 » 24 ™ 64S 12.816 ^ nO. 99348 2.97 633 474 U 25 1.39557 13.036 nO. 99822 3.08 619 222 449 12 26 1.40176 13.958 nl. 00271 3.20 604 222 423 12 27 1-4°78° 587 13-48° 222 nl. 00694 *•" 13 28 1.41367 13.702 nl. 01088 3.45 567 221 363 13 29 1'41934 545 "•"* 220 nl. 01451 3.58 30 1.42479 ,4.1i:i nl. 01779 3.72 522 217 292 15 Dec. 1 1.43001 14.360 nl. 02071 3.87 496 213 1MB 15 2 1.43497 14.573 •l.OHH 4.02 468 208 210 16 3 1.43965 nl. 02533 438 203 166 16 4 1.44403 14.984 nl. 02699 4.34 405 195 118 17 5 1.44808 15.179 nl. 02*17 4.51 369 187 68 17 6 1.45177 15.366 nl. 02885 4.68 335 177 16 17 7 1.45512 15.543 nl. 02901 — 4.85 294 166 411 18 8 1. 45806 15.709 nl. 03861 5.03 253 154 96 18 9 1.46059 15.863 nl. 02765 5.21 209 140 155 17 10 1.46268 10.003 nl. 02610 5.38 11 163 1.46433 ,6. ,29 la« nl. 02395 ' 5,56 18 119 275 12 16.239 nl. 02120 5.74 71 93 336 17 13 1.46623 16.332 nl. 01784 5.91 34 75 398 17 14 1.46647 16.407 nl. 01386 6.08 35 57 458 17 15 1.4MB 16.464 nl. 00928 6.25 73 38 516 16 1.46549 ^ 4- 16.502 nl. 00412 + 6 41 573 15 XC11 EPHEMEKIDES AND AUXILIARY TABLES. Parallax tables for Santiago. Venus I— Continued. Washington Noon. log. A. * log. E. D+E. 122 " 18 573 " 15 1850. Dec. 17 1.46427 +16.520 _ "0-99839 +6.56 H 18 1.46258 16-519 on »0.99212 13 19 1.46042 ™ 16.499 ' "0-98534 725 6-83 J3 20 1 . 4,K OU 16.460 nO.97809 6.95 58 1 1 21 1.45475 ^ 16.402 nO.97040 '-06 !0 22 23 !-45127 388 I-44739 426 le'o^ 93 109 nO.96232 «0. 95390 7.16 7.24 24 1-44313 ^ 124 ,,0.94519 7.31 25 nO. 93624 7.37 . 1-438 ' 4g. 138 915 4 26 15.863 nO .92709 7 41 27 !-43357 525 151 nO. 91780 7.44 3 553 162 939 1 28 1.42279 15.550 nO.90841 7.45 579 MS 0 29 15.378 n0.89H96 7.45 - 602 945 1 30 1"41098 623 15.197 189 n0.88951 7.44 31 1-40475 15.008 195 nO.88008 7.42 1851. Jan. 1 1.39834 201 ,,0.87071 7.39 2 1.39176 14.612 ; 1,0.86144 7.34 672 915 5 3 1.38504 14.407 nO.85829 7.29 684 209 901 6 4 1 .37820 14.198 ' nO. 84328 7.23 694 211 884 5 1.37126 13.987 ,,0.83444 7.16 703 213 866 8 6 1-36423 13'774 2 nO. 82578 7.08 7 1.35713 ° 13-M1 24 nO. 81731 827 7-M 10 g 1.34998 13.347 nO. 80904 6.90 719 213 806 9 9 1.34279 13.134 nO. 80098 6.81 722 213 785 10 10 1.33557 12.921 nO.79313 6.71 11 724 1.32832 1S.710 211 764 nO. 78549 6.61 10 725 210 742 11 12 1.32107 12.500 nO. 77807 6.50 724 207 721 11 13 1.31383 12.293 nO.77086 6.39 724 205 701 11 14 1.30659 12.088 nO. 76385 6.28 722 202 681 11 15 1.29937 11.886 nO. 75704 6.17 719 198 662 11 16 1.29218 11.688 nO.75042 6.06 716 195 643 11 17 1.28502 11.493 nO. 74399 5.95 712 192 626 12 18 1.27790 11.301 nO.73773 5.83 708 188 609 11 19 1.27082 11.113 nO. 73164 5.72 703 185 593 11 20 1.26379 10.928 7,0.72571 5.61 698 181 579 11 21 1.25681 10.747 nO.71992 5.50 692 177 565 11 22 1.24989 10.570 nO.71427 5.39 687 173 553 11 23 1.24302 10.397 l»0. 70874 5.28 681 170 541 10 24 1.23621 10.227 nO.70333 5.18 675 165 531 11 25 1.22946 10.062 nO. 69802 5.07 669 162 521 10 26 1.22277 9.900 ,,0.69281 4.97 27 1.21615 9.742 158 [7TO nO. 68768 4.87 10 28 1-^ 6J?q 9.588 1M nO. 68262 : 4.77 !° 649 150 500 9 29 1.20310 ( 9.438 nO. 67762 4.68 643 494 30 1.19667 9.291 nO. 67268 4.58 637 143 490 31 1.19030 9.148 nO. 66778 4.50 630 487 Feb. 1 2 S-= 9.009 8.873 132 nO.66291 nO. -65807 482 4.41 4.32 3 1.17157 8.741 nO. 65325 4.24 4 1.16545 «» 8.612 nO. 64843 4.16 8 5 1.15939 ' 8.486 m 481 8 4.08 600 123 4«o 7 6 1.15339 8.363 nO. 63880 4.01 595 119 484 7 7 8.244 ,,0.63396 3.94 8 l!ni» ™ 8.128 "b 486 ,10.62910 3.87 9 1.13572 ' 8.015 H3 488 n .o'&KiZ 6 3.81 Tin 10 1.12994 7.905 nO.61930 3.74 7 11 1.12401 7.797 496 nO.61434 6 3.68 12 1.11853 r 8 7.693 nO.60933 ' 6 3.62 13 1.11289 ' +7.591 506 nO. 60427 +3.57 i EPHEMEBIDES AND AUXILIARY TABLES. Parallax tables for Santiago. XClll Venus II. Washington Noon. log. «i. D. log. £. D+E. 1852. May 26 1.12176 + 7.150 0.70301 +12.20 27 1.12701 7.256 0.70608 ; o 14 28 530 7.366 0.709,0 ** a.« 14 29 1'13765 M 7.478 0.71206 ^ 12.63 30 j'l4™ 545 7.594 0.71496 [ 12.78 31 7.713 0.71782 12.94 June 1 1.15401 122 7.835 0.72062 "? 13.09 2 f.15957 125 0.72337 2'5 13.25 3 4 1.165,9 *2 1.17086 8.089 8.221 132 0.72808 | 0.72874 ] 13.41 13.58 17 5/3 1C 5 8.356 0.73135 2^1 13.74 578 17 6 1.18337 8.495 0.73392 ^7 13.91 7 1.18820 8.638 0.73645 ,4.09 ;8 8 1-'9409 595 8.784 146 0.73894 ^ 14.27 9 1-a°°04 600 8.934 0.74139 j 14.45 ; 10 1.20604 9.087 0.74380 | 14.63 605 11 12 ,.21209 1.21820 9.244 9.405 0.74617 23? 0 74851 234 "•» 15 01 13 1 9.569 164 0.75081 23° 19 15.20 14 1.23055 9-737 168 0.75308 ] 15.40 15 1.23680 9.909 0.75532 ' 15.60 \ 16 17 629 !{££ «* 10.084 J7* 1°-a63 183 221 0.75753 0.75972 219 15.81 16.01 18 10'446 86 0.76188 ' 16.22 ; 19 20 1'36218 ™ 1 .26860 10.632 10.821 189 0.76401 0.76612 2U 16.66 ! 21 1.27503 11.014 0.76820 ' 22 16.88 22 1 .28147 ' 11.209 0.77025 ** 17., 0 » 23 643 11.407 0.77228 ^3 17.32 » 24 25 1.29435 642 1.30077 11.608 ' 11.812 *» 0.77428 ' 0.77625 17.56 26 27 1.30716 ^ 1.31350 ™* 12.017 *» 12.223 ^ 0.77819 0.78010 KM ; 18.25 28 1.31979 12.430 | 0.78197 187 23 I8'48 24 29 1.32601 12.638 0.78380 18.72 ' 30 1.33314 6'3 12.846 0.78558 1/8 18.95 » July 1 1.33817 13.053 0.78730 19.18 2 1.34408 ' 13 259 2"6 0.78897 19 4 23 3 577 1.34985 13 462 2°3 0.79057 16° 19^4 23 4 1.35547 ,3:662 *» 0.79210 19.86 5 1.36090 ; 13.859 0.79354 22 20.08 6 1.36613 J 14.051 135 0.79489 7 1.37114 14.236 0.79614 20.49 8 1.37591 4" ,4.415 0.79727 "3 19 20.68 9 1.38041 14.586 " 0.79B28 2087 19 10 1'38463 392 14'748 ,52 87 0.79915 17 21.04 11 1.38855 ,4.900 0.79987 f 21.21 12 1.39214 15.041 0.80043 X 21.36 1S ,3 1.39538 15.169 39 0.80082 2,49 13 14 '•— » 15.285 0.80103 Q 12 21.61 15 1.40075 15'387 88 0.80105 — 18 21.71 16 1.40285 15.475 £ 0.80087 40 21.80 17 1.40455 I5-M7 56 0.80047 21.86 18 1.40582 15.603 0.79986 21.9, 19 1.40667 15.642 0.79902 0 21.94 20 1.40708 15.665 0.79795 Q 21.94 - I 6 130 21 22 1.40706 1.40660 15.671 15.660 0.79665 0.79513 21.93 21.90 23 24 1.40570 • '•"'- 1" 15.639 44 !s» 6° 0.79338 ™ 0.79140 221 21.85 5 21.78 7 10 25 1.40362 0.78919 21.68 26 1.40046 \ + 15.452 0.78676 j +81.57 XC1V EPHEMERIDES AND AUXILIARY TABLES. Parallax tables for Santiago. Vrims II — Continued. Washington Noon. log. Jt. D. log. E. D+E. 1852. July 27 256 1'39790 294 90 +15.362 0-8412 fg4 " 13 +21.44 28 1.39496 ^ 15.257 m 0.78,28 ™ 21.30 ^ 29 1.39165 i 129 °'H?^ 322 21.14 ^ 30 1'38799 399 5-011 140 340 fT 19 31 1.38400 150 °'77162 356 20 Aug. 1 1.37970 159 0.76806 20.58 2 1-37512 ^ 0.76434 20.37 3 1-37°27 510 14.395 |®7 °-76048 399 20.16 4 1'36517 532 14.222 • 412 19.93 5 1.35985 ^ !4'°864o la 0.75237 423 19.70 6 1.35433 0 74814 19.46 7 570 ***» !» 0.74380 19.22 '. 444 25 8 1.34276 13.482 0.73938 ^ 25 g 1 13675 13.290 0 73483 18. ^2 613 194 462 10 1.33062 13.096 0.73021 ^ 18'47 25 11 1.32438 12.902 0.72551 3G , 12 1 31804 TO r-ng 0.72073 17.96 194 485 13 1 31162 0.71588 17.71 193 492 14 15 16 1.30513 1-SMSB 659 »:i» ™ 11.941 071096 499 °-70597 505 0.70092 UM * 16.96 ! 662 512 24 17 1 1 7^4 0.69580 16.72 664 ,85 519 25 18 1.27874 11.569 lg~ 0.69061 16.47 666 24 19 20 21 1.27208 1-98541 6^7 11.386 ' H.207 ™ U'031 173 0.68535 0.68003 0.67464 «:« « »•" 23 22 TO " 665 10.858 0.66918 15 -W 23 23 1.24543 10.688 0.66365 15.30 664 561 24 1.23879 10.521 0.65804 15.07 662 568 25 i-aMi7 r« 1°-358 160 0.65236 "•85 22 26 1-225a7 7 10'198 £ 0.64660 5g4 14.63 27 28 1.21900 1.2,245 ^ 10'042 l£ 9.889 °-64°76 593 0.63483 1- f 651 149 602 29 1'30594 648 9'74° 145 0.62881 1)1 1 13.99 - 30 31 1.19946 1.19302 J 9.594 9'452 » 0.62270 0.6,650 13'79 20 13'59 20 Si'pt. 1 636 9.313 ^ °-6102° 640 13'39 20 2 1-18M5 632 9'178 132 0.60380 13.19 3 1.17398 62g 9'046 129 0.59730 13.00 4 5 := s ' 8.917 ••"" » 0.59068 0.58395 12"81 18 13.63 6 1.15523 8.670 0.57710 12.45 614 119 697 18 7 8 1.14909 ™ £ 8'551 115 8'436 0.57013 0.56303 12.27 12.09 9 1.13694 8.323 0.55581 11.92 600 110 736 17 10 1.13094 8.213 ; 0.54845 11.75 750 17 11 1.12498 ~" 8.106 0.54095 7rr 11.58 12 1.11907 8.002 rwO 0.53330 11.42 13 14 15 '-11321 « 1.10739 1.1.UB S" 7.901 101 '•» » 7.706 780 0.52550 0.51754 « 0.50942 16 11.26 U'10 10.94 16 17 1.09589 ' 1.09021 7.612 + 7.521 91 830 0.50112 0.49265 16 10.78 15 +10.63 a For correcting the Santiago observations for differential refraction we have, using as before, 8, a, d, to denote the respective positions of the planet and its comparison-star ; K, the refrac- tion from Bessel's third table, and £ the zenith distance : cos £ = sin n sin (N + d) and as a correction for the measured differences, •a) = . cos2 d 3(3 — d)= ; EPHEMERIDES AND AUXILIARY TABLES. XCV in which the auxiliary quantities N cotg n sin n are taken from the following table, which has been computed for the latitude of Santiago, and for the hour-angle 0 — a as argument. Table for computation of differential refraction at Santiago. e—a. N. log. cotg n. log. sin n. 0— a. jr. log. cotg n. h. m. » i n ft. m. • I) 0 123 26 25 0.00000 1 0 124 21 .6 ' 9.34177 1 26 26 7.56122 0.00000 1 1.9 23.5 9.35213 3 30104 1 1 9 725 2 26 29 7.86226 9.99999 2 25.4 9.35938 5 17610 2 2 0 714 3 26 31 8.03836 9.99997 3 27.4 9.36652 6 12495 2 2.0 703 4 26 40 8.16331 9.99995 4 29.4 9.37355 8 9692 3 2 0 •B 5 26 48 8.26023 9.99992 5 31.4 9.38047 10 7920 2 2.0 683 6 26 58 8.33943 9.99990 6 33.4 9.38730 II 6696 4 2.1 673 7 27 10 8.40639 9.99986 7 35.5 9.39403 13 4 2.2 663 8 27 23 8.46441 9.99982 8 37.7 „ 9.40066 16 5118 5 2 1 9 27 39 8.51559 9.99977 9 39.8 9.40721 17 4578 6 2.2 646 10 27 56 8.56137 9.99971 10 42.0 9.41367 19 4143 6 2.2 637 11 28 15 8.60280 9.99965 11 44.2 „ 9.42004 12 28 36 3782 8.64062 . 9.99959 ' 12 46.5 2'3 9.42633 6f 22 3480 8 2.3 13 28 58 25 8'67542 3222 9.99951 13 48'8 2.3 9.43254 ™ 14 2923 8.70764 9.99944 14 51.1 9.43867 26 3001 9 2.4 60) 15 29 49 8.73765 9.99935 15 53.5 9.44472 28 2808 9 16 30 17 8.76573 9.99926 16 55.9 9.45070 30 2638 9 2.5 •MO 17 3047 31 8-7W11 2487 9.99917 10 17 ,24 58.4 9.45660 5 BM 18 31 18 . 8.81698 , 9.99907 18 125 0.9 9.46244 "* 23o-l 11 19 31 5-3 8.84052 9.99896 19 3.4 9.46821 35 2233 11 2.5 570 20 3227 6.8CHB 9.99885 20 5.9 9.47391 37 2126 12 2.6 ri63 21 33 4 8.88411 9.99873 21 8.5 „ 9.47954 40 2026 12 2.6 158 22 3344 40 1937 9.99861 22 2.7 9.48512 551 23 34 24 8.92374 9.99848 23 13.8 9.49063 43 1856 14 2.7 *>45 24 35 7 8.94230 9.99834 24 16.5 „ 9.49608 45 1780 14 2.7 540 25 35 52 8.96010 9.99820 25 19.2 „ 9.50148 26 46 36 38 8.97721 17U 9.99805 ' H 22.0 2'8 9.50681 M3 48 1647 15 2.8 527 27 3726 8.99368 9.99790 27 24.8 9.51208 ; 50 16 2 8 28 38 16 9.00956 9.99774 28 27.6 „ 9.51731 5 52 1532 16 2.9 29 39 8 9.02488 9.99758 29 30.5 9.52248 5 54 I/ 2.9 30 40 2 9.03969 9.99741 30 33.4 „ 9.52760 5 55 18 3 0 31 40 57 9.05402 9.99723 31 36.4 , 9.53267 58 1389 18 3 0 32 41 55 9.06791 9.99705 32 39.4 * 9.53769 5°2 59 .346 19 3.0 497 33 42 54 9.08137 9.99686 33 42.4 „ 9.54266 61 1307 19 3.1 400 34 43 55 9.09444 9.99667 34 45.5 9.54759 63 1269 20 3.1 487 35 36 44 58 46 3 «" 9.ma 1234 9.99647 9.99627 3 35 36 4816 3.2 9.55246 9.55729 * 67 21 3.2 470 37 47 10 9.13148 9.99606 37 55.0 9.56208 69 22 3.2 475 38 48 19 9.14318 9.99584 M 125 58.2 . 9.56683 70 1139 22 3.3 470 39 49 29 , 9.15457 9.99562 39 126 1.5 „ 9.57153 40 73 50 42 . 9.. 6568 "" 23 9.99539 40 4.8 ' 9.57619 * 41 74 51 56 9.17653 9.99516 a 41 3.3 9.58081 4 42 53 12 9.18712 IOS9 9.99492 2 42 3.4 9.58539 458 78 25 3.4 454 43 54 30 9.19747 9.99467 43 14.9 I 9.58993 81 25 44 55 51 9.20758 9.99442 44 18.4 , 9.59444 5 82 25 3 5 447 45 57 13 , 9.21747 9.99417 ^ 45 21.9 " 9.59891 83 26 3.6 443 46 123 58 36 9.22716 9.99391 46 25.5 3.6 9.60334 4IW 47 124 0 2 9.23664 9.99364 47 29.1 , 9.60773 * 88 928 28 3.6 48 130 90 9.24592 9.99336 28 48 '7 3.7 9.6.209 « 49 3 ° 91 9'25502 892 9.99308 49 »'4 3.7 9.6,642 ™ 50 431 9.26394 9.99280 50 40.1 , 9.62071 94 876 29 3.8 51 6 5 9.27270 9.99251 51 43.9 9.62497 95 858 30 3.8 422 52 7 40 9.28128 9.99221 a 52 47.7 „ 9.62919 98 843 30 3.8 419 53 9 18 9.28971 9.99191 53 51.5 „ 9.63338 99 828 31 3.9 417 54 10 57 9.29799 9.99160 54 55.4 , 9.63755 102 31 3.9 55 12 39 9.30612 9.99129 55 126 59.3 8.64169 4 103 800 32 4.0 410 56 1422 106 9.3.412 9.99097 56 127 3'3 4.0 9.64579 407 57 16 8 9.32197 9.99064 57 7.3 9.64986 107 773 33 4.1 404 58 17 55 , 9.32970 9.99031 58 11.4 * 9.65390 109 760 34 4.1 400 59 19 44 9.33730 9.98997 59 15.5 , 9.65792 112 747 34 4.1 •MM) 60 124 21 36 9.34477 9.W9M 60 127 19.6 9.66191 XCvi EPHEMKRIDES AwD AUXILIARY TABLES. Table for computation of differential refractions at Santiago — Continued. 0 — a. N. log. cotg n. A.m. ° t 2 0 127 19.6 ' 9.66191 4.2 396 1 23.8 9.66587 4.3 393 2 28.1 9.66980 4 3 391 3 32.4 9.67371 4.3 388 4 36.7 9.67759 4.4 386 5 41.1 9.68145 4 4 383 6 45.5 9.68528 4.5 380 7 50.0 9.68908 4 5 378 8 54.5 9.69286 4 6 376 9 127 59.1 9.69662 4.6 373 10 128 3.7 9.70035 4.7 371 11 8.4 9.70406 4 7 369 12 13.1 9.70775 4.7 367 13 17.8 9.71142 14 22.6 4'8 9.71506 3 15 27.5 4'9 9.71869 3 360 16 32.4 ' 9.72229 * 17 37.3 9.72587 5 0 356 18 42.3 9.72943 . 19 47.4 f'1 9.73297 20 52.5 ' 9.73649 a'2 5 2 350 21 128 57.7 9.73999 5 2 22 129 2.9 9.74347 346 23 8.2 ' 9.74693 5.3 345 24 13.5 9.75038 342 25 18.8 5'3 9.75380 . 26 24.2 5'4 9.75721 27 29.7 5'5 339 9.76060 337 28 35.2 9.76397 336 29 40.8 5'6 9.76733 30 46.4 5'6 9.77066 ** 31 52.1 " 9.77398 ^ 32 12957.9 5'8 9.77729 331 33 130 3.7 ' 329 9.78058 34 9.5 5'8 9.78385 * 35 15.4 5'9 9.78710 "* 36 21.4 6'° 9.79034 a* 300 37 27.4 9.79356 ~ 38 33.5 ' 9.79077 321 39 39.6 6'1 9.79996 6.2 318 40 45.8 9.80314 316 41 52.1 9.80630 ° 6 3 42 130 58.4 9.80945 43 6.4 131 4.8 314 9.81259 44 11.2 A 9.81571 45 17.7 '5 9.81882 46 6.5 9.82191 47 30.8 9.82499 3 TOfi 48 37.5 9.82805 49 50 44'8 I'l 51.1 «•« 9.83110 9.83414 51 131 58.0 9.83716 3 52 132 4.9 ' 9.84017 3 300 53 11.9 ' 9.84317 54 18.9 '° 9.84616 2" 55 26.0 ' 298 56 33.2 7'2 9.85210 57 58 £ - B.8.1505 M5 9.85798 * 59 55.2 9.86090 2 60 133 2.6 1A 292 9.86382 EPHEMERIDES AND AUXILIARY TABLES. XC\ri The Cambridge observations were given without any correction for refraction. The series is not sufficiently extensive to warrant the computation of tables for this purpose ; but manuscript tables computed for the Cloverden observatory, which is only about half a mile distant from the Harvard observatory and differs but a few seconds in latitude, furnished values of the requisite auxiliary quantities. These tables are oiuitted here, on account of the disproportionate length to which it would be necessary to print them, inasmuch asof all the twenty-six Cambridge observa- tions of Mars, (only seventeen of which were contemporaneous with the Santiago series,) there are but three when the hour-angle was less than 2\ and but four others when the planet was within 3h of the meridian The remainder were at very low altitudes, the meridian distances ranging from 3" to 6h 53™, and the differential refraction in declination amounting in one instance to 1".45. These values are, moreover, uncertain, to some extent, from the absenca of the corresponding readings of any meteorological instrument, excepting the external ther- mometer. At the Cape of Good Hope observatory, forty-seven determinations and forty-nine compari- sons were made, the hour-angle exceeding 46m in only five instances, and approaching the maximum lh 35'" in but a single isolated case. And siuce the latitude ol this observatory differs from that of Santiago by less than half a degree, arid the whole differential refraction for the observations of the Cape series exceeds 0".75 in only two instances, we may without sensible error employ, in reducing this series, the tables computed for Santiago, with slight modifica- tion in extreme cases. Thus, since cos n = cos D::c. 19 9 7 25.42 306 43 26.1S —1 12.71 —7.8 +19 51 28.44 +0.36 +1.95 9 7 25.78 +19 51 30.39 103 1MB. Apr. 2 26.14 Ml-) 11.88 +7.7 ; 30.37 -0.37 1.63 25.77 31.90 Washington Mar. 16 36 9 8 15.15 15.24 306 19 9.68 —1 12.11 8.05 11.39 +6.3 4.9 +30 15 30. M —0.61! 32.35 0.46 +2.71 2.00 9 8 14.55 14.78 +20 15 32.85 31.35 107 14.93 1.22 11.99 13.1 31.78 0.45 1.93 14.47 33.71 29 15.09 4.32 11.78 8.9 32.67 0.42 1.79 14.67 3-1.46 B';sscl 375 Mar. 30 9 8 14.82 306 42 26.05 ; —1 10.75 +8.8 +19 52 10.01 —0.41 + 1.84 9 8 14.41 +19 52 11.85 106 31 14.67 23.15 10.15 8.3 9.81 0.37 1.63 14.30 11.44 Bessel 275 Mar. 10 9 4 27.48 305 57 8.14 —1 13.14 +5.2 +20 3? 33.91 —0.61 +3.03 9 4 26.85 +20 37 35.94 102 23 27.26 5.05 13.43 5.1 37.39 0.48 2.09 26.80 39.48 23 27.39 5.45 13.13 5.0 36.79 0.43 1.95 26.96 38.74 Bessel 278 Mar. 15 8 47 26.28 304 19 33.50 ! —1 17.82 +4.8 +22 15 13.62 —0.51 +2.08 8 47 25.77 +22 15 15.70 91 16 26.83 31.70 17.61 6.2 13.82 0.50 2.01 26.33 15.83 22 26.46 31.82 17.51 5.5 14.30 0.43 1.57 26.03 15.87 H 26.60 32.98 16.83 4.9 13.06 0.36 1.29 26.24 14.35 Bessd 3-1 -1 Mar. 13 8 40 18.16 303 50 7.68 —1 18.38 +3.9 +22 44 40.91 —0.50 +1.99 8 40 17.66 +22 44 42.90 n 15 18.10 8.42 19.23 4.8 40.12 0.47 1.80 17.63 41.92 B A. C.3181 Mar. 13 91218.49 3065153.20 —1 10.28 +3.9 +19 42 47.29 -0.61 +3.06 9 12 17.88 +19 42 50.35 109 15 18.07 53.55 11.01 4.8 46.77 0.60 2.94 17.47 49.71 A Cuncri Jan. 19 20 8 11 44.15 44.57 302 5 57.68 58.88 —1 24.47 24.17 + 1.3 —0.6 +^24 28 59.60 60.00 —0.48 0.49 +4.01 4.00 8 11 43.67 44.08 +24 29 3.61 • 4.00 64 21 44.24 6 1.82 24.91 —0.4 57.60 0.51 3.99 43.73 1.59 22 23 44.45 44.29 5 57.08 57.98 24.87 25.20 +3.6 1.0 58.30 60.33 II.. VI i).r,:i 3.98 3.96 43.93 43.76 2.28 4.29 24 44.42 57.10 25.14 +2.0 60.15 ....> 3.91 43.83 4.93 27 44.33 58.05 24.41 +0.1 69 37 0.56 3.86 43.77 4.23 28 44.37 6 1.33 24.68 3.5 56.97 0.57 3.83 43.80 0.80 30 44.38 0.45 25.17 +0.6 58.23 0.58 3 77 43.80 2.00 : 31 Feb. 1 44.12 44.25 1.30 5 57.95 N.a 23.85 —1.2 +2.5 58. ai 0.58 57.51 0.59 3.74 3.70 43.54 43.66 ».ii 0.53 1.82 16.51 50. OS 22 16.93 53.90 14.70 5.5 49.47 0.49 1.60 16.44 51.07 nr-sci i>78 Jan. 5 8 59 27.31 305 5 28.87 —1 16.13 + 5.5 +21 29 15.87 —0.13 +3.72 8 59 27.18 +21 29 19.59 98 Mar. K! 15 28.11 B7.7J 24.80 27.35 14.92 3.9 15.70 4.8 20.25 17.66 0.57 0.55 2.53 2.39 27.54 27.20 22.78 20.05 Brfsel 278 Jan. 0 : Mar. 15 8 53 47.45 47.32 305 0 36.70 40.48 —1 15.14 + 5.9 15.90 4.K +21 34 6.65 4.73 —0.17 0.53 +3.79 2.31 8 53 47.28 46.79 +21 34 10.44 7.04 96 1C 48.06 38.72 15.65 6.2 4.84 0.52 2.25 47.54 7.09 Ilrsscl 278 Jan. 7 8 50 25.75 304 50 31.10 —1 16.94 + 12.4 +21 44 7.53 —0.21 +3.85 8 50 25.54 +21 44 11.40 94 8 25.74 26.58 17.39 14.8 10.12 0.23 3.89 25. 51 14.01 Mar. 9 26.21 34.68 15.26 4.1 10.59 0.58 3.63 25.63 ISM 10 28.93 a-.. 12 16. l.'l 5.2 9.92 0.57 2.57 .25. 6« 12.49 12 26.28 x.n 15.53 4.5 10.52 0.55 2.43 K.~:< 12.95 19 25.98 36.30 17.411 4.1 11.17 0.47 1.95 25.51 13.12 i Oil COMPARISOX-.STARS. Reduction of Stars determined at Santiago — Continued. Name. Date. Obs'd a Circle reading Refraction. Nadir. Observed O. Reduet'n (o mean equinox, ia52.0. Mean place for 1852.0. No. • in «. in 5. .vs. 40 59.75 —1 18.49 18.23 +13.5 7.7 +22 8 42.70 44.89 —0.30 +4.04 0.26 i 0.83 8 47 32.80 1 +22 8 46.74 32.81 45.72 M 6 32.71 55.35 17.15 8.2 47.71 0.20 j 0.55 3:2.51 '. 48.26 Bessel 378 Jan. 14 8 44 15.48 304 0 58.25 —1 18.55 — 0.7 +22 33 55.11 —0.36 +4.15 8 44 15.12 +22 33(59.66) 88 Mar. 19 15.76 1 17.38 19.87 + 4.1 32.50 0.45 1.68 15.31 34.18 23 15.54 12.80 18.83 5.1 35.04 0.40 1.39 15.14 30.43 25 15.71 18.40 18.39 5.0 29.10 0.37 1.25 15.34 30.35 Bessel 278 Jan. 13 8 45 58.27 304 12 10.78 —1 20.00 + 0.8 +22 22 42.53 —0.34 +4.11 8 45 57.93 +22 22 46.64 99 Mar. 25 58.51 5.34 17.86 5.0 41.63 0.37 1.31 5*.H 42.94 27 58.48 11 56.25 17.77 13.1 42.53 0.35 1.17 58.13 i 43.70 II. C. 17513 Jan. 17 8 45 28.48 303 43 19.08 —1 19.32 — 2.1 +22 51 36.45 —0.41 +4.23 8 45 28.07 +22 51 40.68 N Mar. 18 28.50 12.90 21.65 + 5.8 37.06 0.47 1.67 28.03 38.73 20 28.08 14.40 19.56 3.9 35. ^1 0.44 1.63 27.64 37.00 Busscl 3-14 Mar. 13 8 35 7.26 303 20 19.52 —1 19.83 + 3.9 +23 14 30.52 —0.48 +!.Kt c :r, 6.7s +231432.35 85 15 6.90 21.23 20.73 4.8 28.82 0.46 1.U9 0.44 30.51 Washi Mar, 26 8 31 41.30 303 18 35.82 —1 19.87 + 4.9 +23 16 13.28 —0.29 +0.89 8 31 41.01 +23 16 14.15 82 27 40.98 33.12 20.35 13.1 8.24 0.28 0.82 40.70 9.06 29 41.07 33.62 20.16 8.9 11.75 0.25 0.68 40.82 12.43 Washington Mar. 23 8 30 11.90 30U 10 28.52 —1 21.28 + 5.1 +23 24 21.77 —0.33 +1.03 ! 8 30 11.57 +23 24 22.80 25 11.97 30.58 20.78 5.0 19.31 0.29 0.90 ' 11.08 ' 20.21 27 12.08 21.88 20.77 13.1 19.90 0.25 0 77 11.83 20.67 Mean places for 1852.0 of Comparison-Stars determined at Santiago. Refer- ence No Name. a. No. obs. *. No. obs. Refer- ence No- Name. (J.. No. > obs. °- No. nbs. h. m. s. 0 h. m. s. 0 47 II. C. 15401 . 7 46 36.58 3 +24 44 50.99 3 87 Bessel 344 , . 8 40 17.65 2 +22 44 42.41 2 48 H. C. 15412 . 7 46 57.25 3 24 36 49.06 3 88 Bessel 278 . . 8 44 15.23 4 22 33 33.65 4 49 Bcssel 341 . . 7 47 5.71 3 25 3 3.28 3 89 II. C. 17513 . 8 45 27.91 3 22 51 38.80 3 52 Bessel 3-11 . . 7 48 38.31 24 54 11.79 5 90 Bessel 278 . . K 45 58.07 3 22 22 44.43 3 54 Bessel 339 . . 7 50 59.58 3 24 28 27.10 3 91 Bessel 278 . . 8 47 26.09 4 22 15 15.44 4 55 H. C. 15608 . 7 52 38.37 3 *24 18 58.82 3 92 Bessel 278 . . 8 47 32.71 3 22 8 46.91 3 57 Bessel 341 . . 7 55 3.29 15 25 0 20.86 15 93 Bessel 278 . . 8 48 54.43 2 21 54 58.75 2 58 Bessel 341 . . 7 55 15.59 6 24 55 10.27 6 94 Bessel 278 . . 8 50 25.60 6 i 21 44 12.86 6 60 Ili-s.^rl 311 . . 7 59 24.13 3 24 52 42.38 3 95 Bessel 278 . . 8 52 13.18 3 22 2 29.81 3 62 Besscl 341 . . 8 6 16.01 6 24 47 0.18 7 93 Bessel 278 . . 8 53 47.20 3 i 21 34 8.19 3 64 A Cancri . . . 8 11 43.69 32 24 29 2.83 33 97 Jli'ssH 273 . . 8 58 16.46 5 21 (i -».fr. h. m. s. 1856. ° , „ A. fn. s. 1856. • IB W. O. ... 9 10 49 April 6 +20 0 27.81 (17 25 38) May 20 —17 44 0.15 Y. 11 26.77 22 0.32 Y. Piazzi IX, 50 . 9 12 45 April 18 + 19 40 52.63 28 June 3 0.73 0.39 Y. Y. (16 41 19) May 20 —26 29 36.48 Y. 18 0.85 Y. 22 36.90 y. June 3 37.96 Y. (17 29 10) May 20 —27 57 25.59 Y. 21 26.66 M. 18 36.85 Y. 22 25.43 y. July 1 36.88 Y. June 20 26.26 M. 4 37.06 Y. 10 36.92 Y. (17 39 91) June 3 —18 0 15.29 Y. 18 15.43 Y. (16 43 21) May 20 —26 40 38.66 Y. 19 15.63 Y. 22 39.14 Y. 28 37.58 Y. (17 39 5) May 20 —18 3 0.43 Y. June 21 38.87 Y. 22 3 0.53 Y. 23 2 59.93 M. (16 49 36) June 3 —26 53 25.06 Y. June 3 3 0.44 Y. 19 23.99 Y. 18 0.49 Y. 21 24.43 Y. 19 0.73 Y. July 1 24.56 Y. (17 44 18) May 20 —28 1 10.01 Y. (16 50 30) June 3 —26 57 37.84 Y. 21 9.68 M. 19 36.67 Y. 22 10.67 Y. 21 37.96 Y. June 19 9.92 Y. July 1 37.12 Y. (17 46 42) May 28 —18 15 41.16 Y. June 3 39.56 y. (16 52 34) May 20 —27 2 17.89 Y. 18 39.93 Y. 21 18.29 M. 20 39.52 M. 22 18.39 Y. June 18 18.34 Y. (17 47 40) May 21 —28 2 17.50 M. * 22 18.28 Y. (16 55 6) May 20 —97 0 38.73 Y. June 3 18.86 Y. 21 40.07 M. 19 17.79 Y. 22 June 18 39.60 38.51 Y. Y. (17 53 49) May 23 -27 52 5.69 M. 28 6.00 Y. (17 0 9) May 22 —27 12 41.09 Y. June 19 6.98 Y. 23 39.74 M. 20 7.16 M. 28 June 18 41.00 40.35 y. Y. (17 53 53) May 31 22 —27 49 17.16 17.18 M. Y. (17 7 32) May 20 -27 23 56.32 Y. June 3 17.91 Y. 82 55.79 Y. July 1 17.35 Y. June 3 55.18 Y. (17 56 20) May 92 —27 50 14.01 Y. 19 54.32 Y. 28 13.93 Y. (17 11 34) May 23 —17 36 21.32 M. June 3 13.74 Y. June 18 23.00 Y. July 1 , 13.49 Y. 20 21.96 M. (17 59 26) May 22 —27 39 36.84 Y. 27 31.44 M. 23 28.04 M. (17 13 16) May 20 —27 51 34.32 Y. June 18 27.14 T. 21 36.10 M. July 4 28.93 Y. 32 35.12 Y. (18 0 15) June 2 —27 45 9.73 M. July 14 36.40 M. 3 4.39 Y. 17 34.85 Y. 19 9.48 Y. . (17 13 48) June 3 —27 32 7 01 Y. July 1 9.99 Y. 19 5.35 Y. (18 4 32) May 28 —25 10 50.45 Y. July 10 7.69 Y. June 3 51.56 Y. 15 7.09 Y. 19 51.36 Y. (17 14 17) June 21 —27 50 43.70 Y. July I 49.94 Y. (17 14 16) May 28 —17 33 46.62 Y. (18 5 11) June 2 —27 32 5.23 M. June 18 46.79 Y. 18 6.89 Y. ao 46.59 M. 91 6.66 Y. 27 45.81 M. July 1 S.71 Y. po CV1 COMPARISON-STABS. Observations of Comparison-Stars with the Washington mural circle — Continued. Star. «. Date. Mean declina- tion, 1860.0. Obs'r, Star. «. Date. Mean declina- tion, 1860.0. Obs'r. A. m. ,v. 1856. o / // A. m. s. 1856. o (18 7 4) May 23 —25 45 0.64 M. (18 15 44) May 28 —26 33 41.65 Y. Julie 20 2.62 M. 30 42.13 Y. July 14 3.23 M. June 3 42.33 Y. 15 1.99 Y. 18 41.91 Y. (18 7 24) May 21 —27 27 14.37 M. 21 42.52 Y. 22 13.05 Y. July 10 15.15 Y. (17 21 37) May 20 —17 41 44.21 Y. 22 44.40 Y. (18 9 5) May 30 —27 5 19.94 Y. 23 44.78 Y. June 3 20.06 Y. 27 July 17 20.72 22.04 Y. Y. (18 18 47) May 20 21 —26 42 45.29 46.31 Y. M. (18 9 35) June 18 —18 50 41J5 Y. 23 46.35 Y. 19 41.42 Y. 23 46.55 Y. July 4 42 62 Y. (18 9 49) May 28 -25 59 3.08 Y. (18 24 3) May 20 —19 4 5.95 Y. June 21 3.76 Y. 22 6.56 Y. July 1 2. 46 Y. June 2 6.96 M. 3 6.27 Y, (18 12 19) May 20 —26 8 33.06 Y. 22 33.43 Y. July 15 33 77 Y Mean declina- (18 1»57) June 18 —18 55 4.68 Y. tion, 1850.0. 19 5.78 Y. 1853. July 15 6.67 Y. (18 18 34) Aug. 8 —26 43 2.86 (18 IS 26) May 30 —26 28 38.29 Y. 12 2.41 July 1 38.85 Y. 19 2.50 10 39.07 Y. 1854. 17 38.92 Y. Sept. 2 3.91 COMPARISON-STARS. • Mean declinations -of Comparison-Stars determined at Washington. CVll No. Name. Mean place, 1860.0. No. obs Year of comp. Red. in a. Mean 8 for beg. of year. Red. in ll . a. 3. 2 3 4 5 8 11 13 14 66 68 69 79 80 85 90 91 94 95 96 97 98 102 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 A. m. s. 5 3 41.760 5 11 6.488 5 18 25.176 5 22 20.422 5 30 13.971 5 46 56.049 5 54 44.989 5 55 8.80 8 13 39 8 16 37 8 17 5 8 28 43 8 30 40 8 35 35 8 46 26 8 47 54 8 50 54 8 52 40 8 54 15 8 58 44 8 59 55 9 4 54 9 8 42 9 10 49 9 12 45 16 41 32 16 43 33 16 49 49 16 50 42 16 52 36 16 55 19 17 0 21 17 7 45 17 11 44 17 13 28 17 14 0 17 14 29 17 14 26 17 25 49 17 2923 17 32 32 17 39 16 y 44 30 17 46 55 17 47 52 17 53 2 17 54 0 17 5632 17 59 38 18 0 28 18 4 44 18 5 24 18 7 17 18 7 38 18 9 18 18 9 38 18 10 7 18 12 30 18 13 10 18 13 38 18 15 56 18 19 0 18 24 15 +26 17 8.83 26 6 31. K 26 27 30.29 26 28 20.17 26 31 57.08 26 27 0.22 26 16 35.98 26 21 6.08 24 27 55.72 24 23 35.60 24 0 2.08 23 44 0.00 23 22 44.75 23 12 51.54 22 20 59.44 22 13 29.11 21 42 25.27 22 0 39.67 21 32 18.63 21 4 30.94 21 37 30.30 20 35 43.67 20 13 37.41 20 0 27.29 +19 40 52.63 . —26 29 37.01 26 40 38.56 26 53 24.51 26 57 37.40 27 2 18.23 27 0 39.23 27 12 40.55 27 23 55.40 17 36 21.93 27 51 35.36 27 32 6.71 27 50 43.70 17 33 46.45 17 44 0.49 27 57 25.99 18 0 15.45 18 3 0.43 28 1 10.07 18 15 40.04 28 3 18.11 27 52 6.27 27 49 17.38 27 50 13.78 27 39 27.74 27 45 3.12 25 10 50.83 27 32 6.12 2545 2.12 27 27 14.19 27 5 20.69 18 50 41.73 25 59 2.77 26 8 33.42 18 55 5.71 26 28 38.78 26 33 42.09 26 43 46.13 —19 4 6.69 12 10 10 11 12 10 10 11 2 2 1 1 1 2 2 1 3 1 2 2 2 1 1 2 1 7 4 3 3 4 4 4 4 4 5 4 1 4 5 4 3 6 4 4 4 4 4 4 4 4 4 4 3 3 4 3 3 3 3 4 5 8 4 1850 1850 1850 1850 1849 1849 1849 1849 1852 1853 1852 1852 1852 1852 1853 1853 1852 1852 1S52 1852 1852 1851 1851 1851 1851 1850 1853 1850 1850 1850 1850 1850 1850 1851 1850 1850 1851 1851 1851 1850 1851 1851 1850 1851 1850 1850 1850 1850 1850 1850 1850 1850 1850 1850 1850 1851 1850 1850 1851 1850 1850 1850 1851 a, —37.12 37.12 37.26 37.28 41.06 41.10 41.05 41.07 • • • • • • • • +26 16 19.79 36 5 49.12 26 26 53.83 26 27 47.09 26 31 28.18 26 26 47.32 26 16 30.60 26 21 1.08 24 29 23.94 24 25 5.54 24 1 32.29 23 45 36.83 23 24 22.66 23 14 32.17 22 22 45.86 33 15 16.30 21 44 14.01 22 2 27.26 31 34 9.08 21 6 23.57 21 29 23.59 20 37 53.86 20 15 49.85 20 3 40.67 +19 43 7.03 —26 28 29.65 26 39 32.64 26 52 23.79 26 56 37.42 27 1 19.84 36 59 43.12 27 11 48.68 27 23 9.80 17 35 44.00 37 50 54.67 27 31 26.46 37 49 3.87 17 33 10.60 17 43 34.25 27 56 59.01 17 59 53.68 18 2 43.91 28 0 56.27 18 15 29.52 28 2 7.21 27 51 59.93 27 49 12.06 37 50 10.47 27 39 37.14 27 45 3.25 25 10 54.71 27 32 10.56 25 45 8.23 27 27 20.72 27 5 28.55 18 50 49.10 25 59 11.27 26 8 44.09 18 55 15.85 26 28 50.43 26 33 55.76 36 43 2.69 —19 4 25.54 t ii —0 49.04 0 42.73 0 36.46 0 33.08 0 28.90 0 12.90 0 5.38 —0 5.00 +1 28.22 1 29.94 30.21 36.83 37.91 40.63 46.42 1 47.19 1 48.74 1 47.59 1 50.45 1 52.63 1 53.29 2 10.19 2 12.44 2 13.38 2 14.40 1 7.36 1 5.92 1 0.72 0 59.98 0 58.39 0 56.11 0 51.87 0 45.60 0 37.93 0 40.69 0 40.25 0 39.83 0 35.85 0 26.24 0 26.98 0 21.77 0 16.52 0 13.80 0 10.53 0 10.90 0 6.34 0 5.32 0 3.31 +0 0.60 —0 0.13 0 3.88 0 4.44 0 6.11 0 6.53 0 7.86 0 7.37 0 8.50 0 10.67 0 10.14 0 11.65 0 13.67 0 16.56 ~0 18.85 Bcssol 405 Besscl 523 Bessel 405 Rilmker 1673 RUniker 1680 . .... W. 0 Besscl 344 Lalande 16464 Bessel 344 . . .... W. 0 Bessel 344 Bessel 278 . . . . . Bessel 278 Bessel 278 Besscl 278 ... ... Bessel 275 Vf.O .... W. O For No. 121 the 28 18.9 1 35.02 19.1 6 16 39.78 25 27 59.8 1849 1 28.92 —0 36.2 6 17 58.70 25 27 23.6 23 8 6 19 30.61 25 43 30.6 1 35.08 18.0 6 17 55.53 25 43 12.6 l^lll 1 29.09 0 39.2 6 19 24.62 25 42 33.4 25 9 6 21 8.80 25 15 26.6 1 34.97 17.4 6 19 33.83 25 15 9.2 1849 1,38.76 0 43.6 6 21 2.59 25 14 26.6 26 9 6 21 42.26 +25 32 16.0 — 1 35.05 —16.8 6 20 7.21 +25 31 59.2 1849 +1 38.95 —0 43.8 6 21 36.16 +35 31 15.4 28 NOTES TO COMPARISON-STARS FROM BESSEI/S ZONES. For N°' 1, the > Name. Mag. Mean a 1840.0. 4 w N. P. D. 1840 0. 1 '— I Mean place for beginning of year. No. H year. 0 0 •S d X 6 fc 1 £ a. Ann. Pr. 8. Ann. Pr. h. m. s. » 1 II h. m. a. «. ° i n u 478 125 Tauri .... 6 1845 5 29 49.53 4 64 11 59.14 7 1849 5 30 32.94 +3.712 + 25 48 24.21 + 8.58 e 515 139Tauri . • . . 5.6 1841,4 5 48 4.12 3 64 4 22.82 5 1849 5 48 37.60 3.720 25 55 46.09 + 0.99 13 587 c Gtiminorum 3.4 1841,3 6 34 5.14 22 64 43 2.52 19 1849 6 34 38.40 3.695 35 16 30.48 — 3.03 35 698 82 Geminorum . . 7 1841 7 38 59.03 3 66 28 9.73 7 1852 7 39 42.21 3.598 33 30 9.18 8.44 i 709 1 Canch .... 6 1845 7 47 54.05 6 73 47 17.71 S 1852 7 48 35.04 3.416 16 10 52.80 9.14 SI 745 A Cancri .... 6 1838,5 8 11 0.68 19 65 28 45.97 1? 1852 8 11 43.68 3.582 34 29 3.58 10.89 64 775 43yCancri .... 4.5 1843 8 34 0.99 9 67 57 39.70 8 1852 8 34 42.91 3.493 31 59 50.10 12.53 1 788 1838 8 48 12.76 5 68 2 20.92 6 1852 8 48 54.40 3.469 21 54 57.68 13.47 93 795 Lalamle 17690 . 8 1838 8 49 43.95 5 68 13 3.33 6 1852 8 50 25.52 3.463 21 44 14.07 13.57 94 809 1838 9 3 35.27 5 68 40 14.22 6 1852 9 4 16.47 3.432 + 21 16 52.62 14.44 101 1467 Piazzi XVH 43 . 6i 1846 17 10 34.69 5 107 34 58.66 4 1851 17 11 13.03 +3.485 — 17 35 44.55 — 4.24 118 cxu COMPARISON-STARS Comparison-Stars from the Greenwich Catalogue for 1850.0. c. 3 £i J | Mean place for beginning of year. a Name. Mig Mean «. W N. P. D. ^ 5 No. o 6 K year. C 6 z o d f. b| O £ a. Aim. Pr 9. Ann. Pr ft. m. s. 0 / // h. m. s. s. o , „ '/ 335 Piazzi IV 287 . . 7 1851. 2 4 56 36.57 2 63 46 53.37 1 1850 4 56 36.56 +3.704 +96 13 6.8 + 5.48 1 350 1852.7 5 3 4.66 5 63 43 41.37 5 1850 5 3 4.64 3.711 26 16 19.8 4.93 2 361 1852.8 5 10 99.36 3 63 54 11.81 3 1850 5 10 29.37 3.711 26 5 49.1 4.30 3 363 Piazzi V 41 . . 6.7 1852.7 5 11 34.43 3 62 12 1.30 3 1850 5 11 34.43 3.760 27 47 58.7 4.21 a 376 1650.5 5 17 47.94 4 63 33 4.66 4 1850 5 17 47.93 3.725 26 26 55.4 3.67 4 381 HBTauri .... 6 1852.1 5 20 2 54 1 64 58 37.10 1 1850 5 20 2.54 3.685 25 1 22.9 3.48 c 383 1852.6 5 21 43.28 2 63 32 14.31 2 1850 5 21 43.27 3.728 26 27 45.9 3.33 5 395 Piazzi V 145 . . 7 1853.1 5 27 46.91 2 63 10 29.27 2 1850 5 27 48.91 3.740 26 49 30.7 2.81 d 401 1852.1 5 29 36.64 3 63 28 30.22 4 1849 5 29 32.90 3.733 26 31 27.3 2.65 8 409 125Tauri .... 6 1851.1 5 30 26.55 7 64 11 39.83 3 1849 5 30 22.84 3.712 25 48 34.6 2.58 e 406 Lalande 10669 . . 9 1852.9 5 32 16.17 6 63 28 5.60 6 1849 5 32 12.53 3.734 26 31 51.5 2.42 9 423 Lalande 11108 . . 8* 1851.2 5 44 38.56 1 63 36 57.33 1 1849 5 44 34.81 3.733 26 23 1.5 1.34 10 426 1852.3 5 46 18.57 5 63 33 13.07 5 1849 5 46 14.82 3.735 36 36 45.9 1.20 11 433 139Tauri .... 5.6 1852.8 5 48 41.30 3 64 4 12.63 3 1849 5 48 37.56 3.720 35 55 46.6 0.99 12 438 Rumkcr 1673 . . . . 1852.1 5 54 7.62 6 63 43 31.39 6 1849 5 54 3.94 3.731 26 16 30.6 0.51 13 439 Rumker 1680 . . 8 1851.4 5 54 32.20 2 63 39 1.83 3 1849 5 54 28.46 3. 731 26 20 57.9 0.48 14 440 Piazzi V 306 . . 7 1851.1 5 54 55 74 2 64 33 29.34 2 1850 5 54 55.74 3.707 2526 37.7 + 0.44 / 451 Lalande 1 Ill.-.l . . 8 1852.1 6 1 34.30 6 63 57 44.01 6 1849 6 1 30.57 3.724 26 2 16.1 — 0.14 15 45 5 Geminorum . . 6 1851.1 S 2 20.35 4 65 33 8.48 3 1849 6 2 16.67 3.678 24 26 51.7 0.21 e 453 Lalande 11714 . . 9 1852.1 6 2 96.04 3 63 59 18.68 4 1849 6 2 99.31 3.724 26 0 41.7 0.21 16 457 Lalande 11854 . . 8 1852.8 6 6 8.93 5 64 37 37.57 5 1849 6 6 5.39 3.705 35 3223.1 0.54 17 458 Lalande 11946 . . 9J 1853.2 6 7 38.84 4 64 27 38.08 4 1849 6 7 35.12 3.709 25 33 22.8 0.67 18 469 Lalande.^; 1" 1852.7 6 9 29.88 2 64 94 58.45 2 1849 6 926.16 3.711 25 35 2.6 0.83 19 467 1852.2 6 11 35.54 4 64 14 15.44 3 1849 6 11 31.81 3.716 25 45 45.7 1.01 20 470 Piazzi Tl 78 . . T 1853.2 6 15 29.36 2 64 59 40.58 t 1849 6 15 25.65 3.696 95 7 30.9 1.35 SI 473 Lalande 19337 . . 9 1851.6 6 16 50.62 4 64 94 37.41 2 1849 6 16 46.90 3.709 25 35 24.2 1.47 22 479 Lalande 12336 . . 8* 1851.2 6 19 97.55 1 64 17 31.33 1 1849 6 19 23.83 3.712 25 42 30.6 1.70 25 485 1852.7 6 21 5.98 2 64 45 35.04 2 1849 6 21 2.27 3.699 25 14 27.0 1.84 36 487 Lalande 12395 . . 9 1852.1 6 31 14.41 1 64 13 91.66 2 1849 6 21 10.68 3.714 25 48 40.8 1.86 27 488 1853.0 6 21 39.95 2 64 28 45.58 2 1849 6 21 36,24 3.706 95 31 16.5 1.89 28 490 Lalande 12554 . . 8 1851.2 6 25 47.97 1 64 58 6.48 1 1849 6 25 44.27 3.692 25 1 56.0 2.25 30 491 Lalande 12557 . . 9 1851.2 6 25 50.33 1 65 15 18.07 1 1849 6 25 46.64 3.684 24 44 44.4 3.26 31 495 1852.0 6 27 24.78 1 65 27 13 30 1 1849 6 27 21 09 3.677 24 32 49.3 2.39 32 496 1852.0 6 27 56.36 1 65 28 57.74 1 1849 6 27 52 67 3.676 24 31 4.9 2.44 33 505 97 Geminorum . . 3.4 1852.1 6 34 43.11 8 64 43 32.11 7 1849 6 34 38.37 3.695 35 16 33.0 3.03 35 573 89 Geminorum . . 7 1852.2 7 39 35.18 8 66 29 33.60 7 1852 7 39 42.38 3.598 33 30 9.5 6.44 t 578 84 Geminorum . . 6.7 1M2.2 7 44 6.09 4 67 17 5.44 4 1852 7 44 13.24 3.574 22 42 37.0 8.80 1 589 Lalande 15707 . . 9 1859.9 7 55 8.26 3 65 4 30.02 3 1852 7 55 15.48 3.615 24 55 10.8 9.66 58 593 • Bradley 1158 . . 7 1852. b 7 57 42.73 6 67 7 0.70 5 1852 7 57 49.85 3.562 22 52 39.6 9.85 1 608 X Cancri .... 6 1852.2 8 11 36.67 7 65 30 34.61 7 1852 8 11 43.82 3.582 24 29 3.7 10.89 64 613 4u' Cancri, pr. . . . 7 1852.2 8 17 43.98 4 64 58 37.71 4 1852 8 17 51.15 3.585 25 0 59.6 11.34 m 617 J8»' Cancri .... 6.7 1852.2 8 19 42.67 4 65 21 41.55 4 1852 8 19 49.82 3.573 24 37 55.5 11.48 n 619 30»' Cancri .... 6 1852.2 822 37.83 3 6525 3.12 3 1852 8 23 44.97 3.568 34 34 34.5 11.69 a 623 2i>« Cancri .... 6 1852.2 8 3i 7.58 6 65 24 32.14 8 1852 8 24 14.71 3.565 34 35 4.3 11.80 P 631 3y Cancri .... 4.5 1852.1 8 34 35.89 23 67 59 45.94 23 1852 8 34 43.88 3.493 21 59 49.0 12.53 1 640 Lalande 17513 . . 9 1852.9 8 45 20.93 6 67 7 55.17 6 1852 8 45 27.95 3.494 22 51 37.6 13.35 89 641 Lalande 17528 . . 7.8 1853.2 8 45 37.92 4 67 12 58.12 3 1859 8 45 44.90 3.492 22 46 35.3 13.27 • 645 1852.2 8 48 46.55 4 68 4 34 63 1852 o 659 Lalande 18105 . . 9 1852.2 9 3 12.64 3 68 57 44.97 3 1852 8 48 54.48 9 3 19.49 J.469 3.429 91 54 58.2 21 1 48.4 1 J.47 14.38 100 661 • • 1852.2 9 4 9.58 5 68 42 40.21 5 1859 9 4 16.43 +3.432 +21 16 51.1 -14.44 101 COMPARISON-STARS. CX111 For the stars from the Histoire Celeste of Lalande, the British reductions made and published under the superintendence of Mr. Baily have been employed, but with some endeavor towards critical scrutiny. The numbers of this catalogue are also here employed for reference. One zone, however, that of 1796, March 4, seemed to give places differing so much and so uniformly from other determinations of the same stars, as to render it advisable lo reduce this anew, which was accordingly done. The tables of Hansen and Nissen were found to be computed with entire correctness, and the only possible source of discordance to be in the declinations of the fundamental stars selected from Piazzi, as the basis of the reduction. The stars chosen for determining the constants anew were these : From Riimker's Catalogue, N°s- 2353, 2383, [2404,] 2477, 2503, 2504, 2533, 2558, 2785, 2799, 2840, 2896, 2920, 2955, 2972, 3004, 3012, [3013,] 3016, 3023, 3047, 3097. From the Twelve-Year Catalogue, Nos- 769, 770, [775,] 802, 804, 809. From Argelander's Catalogue, N°- 207. Those of the above mentioned stars whose numbers are inclosed in brackets proved to have been ill observed by Lalande, and were, consequently, excluded. The result indicates the need of a correction of — 2". 3 to the values given by the tables published by Prof. Schumacher, in his Hiilfstafdn, and used for the preparation of Baily's edition of the Histoire Celeste. The average correction to Lalande's declinations for other zones at the same altitude is — 3".l, if Bessel be the standard. Comparison- Stars from Lalande. Page H. C. tfo. Catalogue. Mean place 1800.0. Year ef comparison. Red. to year of corap. Mean place for beginning of year. No. « d- in a. in d. a. d. h. m. s. . m. s. i n A. m. s. o / It 204 9531 4 53 31.37 +26 8 28.2 1850 +3 5.13 +4 40.4 4 56 36.50 +26 13 8.6 1 139. 143 9944,5 5 8 26.50 27 44 27.3 1850 3 7.98 3 37.1 5 11 34.48 27 48 4.4 a 145,204 10231-3 5 16 58.16 24 58 19.7 1850 3 4.33 3 0.6 5 20 2.39 25 1 20.2 c 143 10510 5 24 40.02 26 47 7.1 1850 3 7.02 2 27.3 5 27 47.04 26 49 34.4 d 145 10605 5 27 20.65 25 46 16.6 1849 3 1.79 2 13.1 5 30 22.42 25 48 29.7 e 145 10669 529 9.19 26 29 46.4 1849 3 2.92 2 5.4 5 32 12.11 36 31 51.8 9 310 11108 5 41 32.85 26 21 49.1 1849 3 3.91 1 12.5 5 44 35.76 36 23 1.6 10 145 11220 5 45 35.32 25 54 49.0 1849 3 2.39 0 55.3 5 48 37.61 35 55 44.3 12 310 11441 5 51 49.97 25 26 14.3 1850 3 5.38 +0 29.0 5 54 55.35 35 26 43.3 / 310 11684 5 58 28.22 26 2 16 8 1849 3 3.50 0 0.0 6 1 30.72 26 2 16.8 15 310 11714 5 59 19.70 26 0 45.7 1849 3 2.40 —0 3.6 6 2 22.10 26 0 42.1 16 310 11854 6 3 3.56 25 22 46.3 1849 . 3 1.47 0 19.6 6 6 5.03 35 22 26.7 17 145 11946 6 5 33.34 25 32 47.1 1849 3 1.72 036.0 6 7 35.06 25 32 21.1 18 145,310 11976,8 6 6 23.32 25 35 36.9 1849 3 1.78 0 33.9 6 9 25.10 25 35 3.0 19 H5,3JO 12197,9 6 12 24.25 25 8 19.15 1849 3 1.10 0 59.6 6 15 25.35 25 7 19.5 31 145 12337 6 13 45.58 25 36 36.7 1849 3 1.75 1 5.4 6 16 47.33 25 35 31.2 .22 145,310 12336,7 6 16 22.34 25 43 51.6 1849 3 1.82 1 16.6 6 19 34.16 35 42 35.0 25 145 12395 6 18 7.65 25 48 5.0 1849 3 1.96 1 -34.1 6 21 9.61 25 46 40.9 27 145 12554 6 22 43.27 25 3 44.3 1849 3 0.87 1 43.7 6 25 44.14 25 2 0.6 30 145 12557 6 22 46.62 24 46 32.1 1849 3 0.47 1 43.9 " 6 25 47.09 24 44 48.2 31 145 12666 6 25 44.71 24 59 28.0 1849 3 0.73 1 56.6 6 38 45.41 24 57 31.4 34 316,14.1 12880,2 6 31 37.36 25 18 50.1 1849 3 1.07 2 21.6 6 34 38.. 13 25 16 28.5 35 51 14961 7 30 45.88 14 39 52.3 1852 2 56.38 6 48.5 7 33 42.26 14 33 3.8 42 51 15125 7 36 0.01 16 0 14.4 1852 2 57.80 7 10.4 7 38 57. SI 15 53 4.0 44 214 15146 7 36 34.97 23 37 24.4 1852 3 7JO 7 13.2 7 39 42.27 23 30 11.3 i 214 15221 7 38 43.3.-> 24 16 38.2 1652 3 8.04 7 22.0 7 41 51.39 24 9 16.2 45 911,214,273 15312-4 7 41 7.29 22 50 8.8 1852 3 6.03 7 31.8 7 44 13.31 22 42 37.0 k 51 15338 7 41 55.1-3 16 6 18.7 1852 9 57.71 7 34.8 7 II 52 83 i:> :,t 43.9 46 214 15)01 7 43 27.81 34 52 32.4 1853 3 8.53 7 41.5 7 46 36.34 34 44 50.9 47 314 15412 7 43 44.64 +24 44 27.1 1852 +3 8.34 —7 42.6 7 41; . +24 36 41.5 48 CX1V COMPARISON-STARS. Comparison- Stars from Lalande — Continued. Page H. C. \o. Catalogue. Mean place 1800.0.' Year of comparison. Red. to year of coinp. Mean place for beginning of year. No. a. 9. in a. in S. «. 3. h. m. s. . m. s. / n A. m. s. « ; it 51 15468 7 45 37.49 +16 18 50.2 1852 +2 57.80 —7 49.9 7 48 35.29 +16 11 0.3 51 214 15548 7 47 46.51 23 42 52.0 1852 3 6.76 7 58.9 7 50 53.27 23 34 53.1 53 214 15608 7 49 30.66 24 27 6.2 1852 3 7.60 S 6.0 7 52 38.26 24 19 0.2 55 146 15707 7 52 7.22 25 3 26.2 1853 3 8.21 8 16.5 7 55 15.43 24 55 9.7 58 214 15795 7 54 45.07 23 1 9.2 1852 3 5.44 8 26.8 7 57 50.51 22 52 42.4 I 52 16068 8 2 30.03 16 13 21.3 1852 2 56.97 8 57.1 8 5 27.00 16 4 24.2 61 211 16236 8 7 11.06 S3 6 19.1 1852 3 3.47 9 15.4 8 10 14.53 21 57 3.7 63 214,279,286 16288-90,91 8 8 37.28 24 38 24.2 1852 3 6.50 9 21.1 8 11 43.78 24 29 3.1 64 214 16447 8 13 2.11 24 34 48.5 1552 3 3.71 9 37.9 8 16 5.82 24 25 10.6 68 214 16464 8 13 30.16 24 11 12.9 1852 3 5.58 9 39.7 8 16 35.74 24 1 33.2 69 214,286 16517-9 8 14 44.55 25 10 53.2 1852 3 6.69 9 44.4 8 17 51.24 25 1 8.8 m 211 16582 8 16 26.80 21 48 13.1 1852 3 2.54 9 50.6 8 19 29.34 21 38 22.5 70 214,279,286 16597-9 8 16 43.47 24 47 52.6 1852 3 6.06 9 51.8 8 19 49.53 24 38 0.8 71 211 16659 8 18 41.68 21 30 56.2 1852 3 2.05 9 59.0 8 21 43.73 21 20 57.2 74 214,286 16685,7 8 19 39.66 24 44 41.5 1852 3 5.74 10 2.8 8 22 45.41 24 34 38.6 0 286 16763 8 21 9.56 24 45 17.9 1852 3 5.65 10 8.3 8 24 15.21 24 35 9.6 P 211 17013 8 28 10.98 20 46 48.8 1852 3 0.57 10 19.3 8 31 11.55 20 36 14.5 81 148,212,214,286 17143-6 8 31 42.25 22 10 43.0 1852 3 1.85 10 46.5 8 34 43.10 21 59 56.5 1 212 17513 8 42 26.06 23 3 5.5 1852 3 1.94 11 24.1 8 45 28.00 22 51 41.4 89 919,254 17514,5 8 42 27.50 20 42 48.8 1852 2 59.46 11 24.1 8 45 26.96 20 31 24.7 r 212,214 17598,9 8 42 43,55 22 58 H.6 1852 3 l.Kt 11 25.1 8 45 45.38 22 46 49.5 s 212 17690 8 47 25.60 21 56 1.9 1852 3 0.34 11 41.1 8 50 25.94 21 44 20.8 94 212 17937 8 55 17.38 21 18 46.5 1852 2 59.06 12 7.1 8 58 16.44 21 6 24.4 97 212 18105 9 0 20.78 21 14 15.1 1852 2 58.56 12 23.4 9 3 19.34 21 1 51.7 100 212 18132 9 1 7.87 +21 29 26.3 1852 2 58.74 12 25.9 9 4 16.61 21 17 0.4 101 567 30556 16 37 50.45 —26 22 44.7 1850 3 4.76 5 45.6 16 40 55.21 26 28 30.2 110 567 30874 16 48 53.77 26 56 14.1 1850 3 6.05 4 59.7 16 51 59.82 +27 1 13.8 114 343 31543 17 10 57.74 17 29 35.4 1851 2 57.71 3 30.8 17 13 55.45 —17 33 6.2 122 170,343 31791,2 17 18 19.76 17 38 14.2 1851 2 58.02 2 58.5 17 21 17.78 17 41 12.7 123 170,343 31931,2 17 22 20.04 17 40 52.8 1851 2 58.13 2 40.8 17 25 18.17 17 43 33.6 124 170 32426 17 35 45.58 18 1 4.6 1851 2 58.73 1 41.4 17 38 44.31 18 2 46.0 127 170 32706 17 43 23.78 18 14 20.0 1851 2 59.08 1 3.0 17 46 22.86 18 15 23.0 129 568 35727 17 44 4.68 28 1 2.9 1850 3 9.09 1 2.7 17 47 13.77 28 2 5.6 130 568 32974 17 50 19 04 27 48 36.8 1850 3 8.82 0 35.5 17 53 27.86 27 49 12.3 132 568 33214 17 56 41.42 27 44 48.0 1850 3 8.74 -0 7.6 17 59 50.16 27 44 55.6 135 566 33394 18 1 2.34 25 10 55.9 1850 3 5.00 +0 11.3 18 4 7.34 25 10 44.6 136 567,568 33427-S 18 1 37.29 27 32 21.1 1850 3 8.42 0 14.0 18 4 45.71 27 32 7.1 137 171 33598 18 6 5.94 18 51 20.1 185! 2 59.91 0 33.9 18 9 5.85 18 50 46.2 141 171 33748 18 9 37.56 18 56 3.2 1851 2 59.99 0 49.6 18 12 37.55 18 55 13.6 144 567 33855 18 12 12.64 26 34 51.6 1850 3 6 95 1 0.2 18 15 19.59 26 33 51.4 146 567 33989 18 15 15.78 —26 44 13.9 1850 +3 7.14 +1 13.5 18 18 22.92 —26 43 0.4 147 ForN°' 11946 the a is assumed to be 1m. less than recorded. This error was transferred to the Nautical Almanac, and to both scries of the Cape Observations . For N*- 18132 the a is assumed to be 10s. greater than recorded. For N°- 17013 an error of 15" in £ is assumed. For N°' 17937 an error of 15" in S is assumed. Other observations still may be found in the catalogues of Kiimker, Piazzi and Taylor, the zones of Lamont and the observations of Mr. Maclear at the Cape of Good Hope. These are appended, as well as the manuscript observations of Professor Brimnow at Ann Arbor, already mentioned, and a small table containing such other observations as have been found of the comparison-stars which are identified .and employed in these computations. COMPARISON-STARS. Comparison-Stars from Rumker. cxv No. Catalogue. >!.-.<•. I/. !>.'!!). 0. KfeM (ills. Ann. free. (J 1830.0. No. 0! Oils. Ann. Free. Year of com . Reduction. Mean place for beginning of year. No. i" «• in 0. «. d. 1499 6 A. in. s. 5 29 34.37 2 s. +3.708 +25 47 50.36 2 ft +2.44 1849 s. +48.24 0 / It + 25 4824.5 e +0 34.1 5 30 22.61 1873 5 53 15. 21 1 3.7J7 26 16 24.24 1 0.59 1849 48.511 7.2 5 54 3.71 26 16 31.5 13 1680 8 5 53 39.52 3 3.728 26 20 53.52 1 0.55 1849 48.57 5.8 5 54 28.09 26 21 0.3 14 1685 5 54 3.59 16 3.704 2526 36.23 10 +0.49 1850 51.89 + 6.8 5 54 55. 4« 25 26 43.0 / 1737 6 6 0 4-2. 10 5 3.722 26 2 16.88 5 —0.10 1849 48.42 — l.S 6 41 30.52 26 2 15.7 15 1744 7 6 1 28.33 1 3.675 24 27 2.01 1 0.15 1849 47.82 2.1 6 2 16.15 34 26 59.9 t 1783 6 6 47,04 1 3.701 25 23 23.99 1 0.59 1849 48.23 8.1 6 7 35.27 25 33 15.8 18 1979 3 6 33 50.37 16 3.691 25 17 9.11 13 2.95 1849 47.95 0 38.8 6 34 38.31 25 16 30.3 35 2335 6 7 47 40.39 3 3.414 16 13 19.63 3 9.07 1852 54.69 2 25.8 7 48 35.08 16 10 5J.8 51 2372 7 52 37.01 1 3.406 16 034.13 1 9.46 1852 54.54 2 3-J.O 7 53 31.56 1558 2.1 58 2476 6 8 10 46.32 3 3.581 24 31 56.65 3 10.82 1852 57.34 2 53.9 8 11 43.66 24 29 2.7 64 2516 7.8 8 16 54.07 3 3.585 25 4 4.29 2 11.31 1852 57.36 3 1.0 8 17 51.43 25 1 3.3 m S545 8 21 47.79 1 3.566 24 37 43.39 1 11.67 185-2 57.06 3 6.7 8 22 44.85 24 34 36.7 0 Nachtr. VIII, 13 . . 8 23 30.76 1 3.374 15 49 30.15 1 11.75 1853 54.05 3 8.6 8 24 24.81 15 46 21.6 75 Nachtr. VIII. 19 8 8 30 16.00 1 3.467 20 39 28.60 1 1-2.22 1852 55.52 3 16.8 8 31 11.52 20 36 12.4 81 2613 8 31 30.14 1 3.427 18 49 33.55 1 12.30 1852 54.88 3 17.5 8 32 25.02 18 46 16.0 83 2624 4.5 8 33 46.88 6 3.492 22 3 9.20 e 12.47 1852 55.87 3 19.6 8 34 4-2.75 21 59 49.6 9 2799 . . 9 6 45.58 1 3.415 20 45 2.14 1 14.58 1851 51.27 3 39.3 9 7 36.85 30 41 22.8 104 2800 9 6 48.13 1 3.411 20 31 41.58 1 14.58 1851 51.16 3 39.4 9 7 39 29 20 28 2.2 105 2830 7 9 11 23.40 3 +3.391 +19 46 47.71 3 —14.86 1851 +50.90 -3 43.4 9 12 14.30 + 19 43 4.3 109 In N°- 1783 the S is assumed to be 25° 32-, instead of 25° 22'. Comparison- Star s from Piazzi. No. Catalogue. Mean place, 1800.0. Year of comparison. Red. to yi-ar of comparison. Mean place for beginning of year. No. «. A in a. in d. «. s.. h. m. s. 0 f II m. s. i it A. m. *. ° / // IV, 287 4 53 31.70 + 28 8 28.2 1850 +3 5.13 + 4 40.4 4 56 36.83 + 26 13 8.6 1 V, 41 5 8 26.56 27 44 25.5 1850 3 7.98 3 37.1 5 11 34.54 27 48 2.6 a 98 5 16 58.36 24 58 25.0 1850 3 4.23 3 0.6 5 20 2 59 25 1 25.6 c 145 5 24 39.67 26 47 4.9 1850 3 7.02 2 27.3 5 27 46.69 26 49 32.2 d 165 5 27 20.50 25 46 14.8 1849 3 1.79 3 13.1 5 30 22.29 35 48 27.9 e 273 5 45 35.16 25 51 51.5 1849 3 2.29 0 55.3 5 48 37.45 25 55 46.8 12 306 5 51 50.07 25 26 12.8 1850 3 5.38 + 029.0 5 54 55.45 25 26 41.8 } 350 5 59 16.34 24 26 59.5 1849 3 0.21 — 0 3.3 6 2 16.45 24 26 56.2 e VII, 207 7 36 34.78 23 37 23.6 1852 *3 7.30 7 13.3 7 39 42.08 23 30 10.5 i 232 7 41 7.40 22 50 14.3 1852 3 6.03 7 31.8 7 44 13.42 22 43 42.5 t 299 7 54 45.00 23 1 10.0 1852 3 5.44 8 26.8 7 57 50.44 22 52 43.2 i VIII, 41 8 8 37.18 24 38 26.7 1852 3 6.50 9 21.1 8 11 43.68 24 29 5.6 64 65 8 14 44.80 25 10 49.0 1852 3 6.69 9 44.4 8 17 51.49 25 1 4.6 m 76 8 16 43 67 24 47 51.4 1852 3 6.06 9 51.8 8 19 49.73 24 37 59.6 n 84 8 19 3!i.-,il 24 44 4-2.0 1852 3 5.74 10 3.8 8 22 45. -2.3 24 34 39.2 0 89 8 21 (I.M4 24 45 14.5 1852 3 5.65 10 8.3 8 24 14.99 21 35 6.2 P 121 8 28 10.52 20 46 49.5 18.V2 3 0.57 10 33.8 H 31 11.09 20 36 15.7 81 142 8 31 41.30 2J 10 39.0 1852 3 1.85 10 46.5 8 34 4:1.15 21 :,9 5-2.5 1 195 'a 42 '27.90 20 4-2 49.2 lt5-2 2 59.46 11 24.1 8 45 27.38 90 31 25.1 T IX, 50 9 921.00 + 19 55 43.3 1851 2 S3 18 12 36.6 9 12 14.18 + 19 43 6.7 109 XVII, 43 17 8 15.47 — 17 si 5s.r, 1851 2 57.71 3 42.5 17 11 1:1. 18 — 17 35 41 0 118 63 17 10 57.47 17 29 37.7 ran - 2 57.71 3 30.8 17 13 55.18 17 33 8.5 122 221 17 35 45.50 18 1 1.5 1851 2 58.73 — 1 41.4 17 38 41.33 18 2 4-2.9 127 XVIII, 24 18 5 32.10 27 5 58.0 1850 3 7.76 + 0 31.1 18 8 39.86 27 5 96.9 140 41 18 9 53.82 26 29 38.0 1850 3 6.84 0 50.1 18 13 0.66 26 28 47.9 145 95 18 20 42.87 — 19 6 2.2 1851 + 3 0.12 + 1 39.0 18 33 42.99 — 19 4 33.3 148 CXV1 COMPARISON-STARS. Comparison- Star -a fro Taylor. No. Catalogue. Mean place, 1635. Year of comparison. Red. to year of comparison. Mean place for beginning of year. No. a. d. in «. TV in 0. «. A h. m. s. ° / n m. s. i it h. m. s. ° / // 1808 4 55 41.12 -f 26 11 44.4 1850 + 0 55.57 + 1 22.6 4 56 36.69 + 26 13 7.0 1 1912 5 10 38.11 27 46 55.3 1850 0 56.39 1 3.7 5 11 34.50 27 47 59.0 a 1988 5 19 7.20 25 0 32.6 1850 0 55.27 0 52.8 5 20 2.47 25 1 25.4 c 2045 5 26 50.77 26 48 47.6 1S50 0 56.09 0 42.8 5 27 46.86 26 49 30.4 ,1 2071 5 29 30.83 25 47 46.5 1849 0 51.96 0 36.7 5 30 22.79 25 48 23.2 e 2220 5 47 45.58 25 55 31.0 1849 0 52.09 0 14.4 5 48 37.67 25 55 45.5 12 2266 5 54 0.29 25 26 31.6 1850 0 55.60 •f 0 7.3 5 54 55.89 25 26 38.9 / 2335 6 1 25.01 24 26 55.7 1849 0 51.50 — 0 2.3 6 2 16.51 24 26 53.4 e 2456 6 14 33.87 25 7 39.6 1849 0 51.77 0 18.3 6 15 25.64 25 721.2 21 2C33 6 33 46.70 25 17 12.0 1849 0 51.76 0 41.7 6 34 38.46 25 16 30.3 35 3222 7 38 41.28 23 32 35.3 1852 1 1.22 2 23.0 7 39 42.50 23 30 12.3 I 3272 7 43 12.73 22 45 13.0 1852 1 0.79 2 29.1 7 44 13.52 22 42 43.9 k 3306 7 47 37.08 16 13 28.4 1852 0 58.11 2 34.8 7 48 35.19 16 10 53.6 51 3402 7 56 48.99 22 55 27 0 1852 1 0.60 2 47.0 7 57 49.59 22 52 40.0 I 3519 8 10 42.92 24 32 11.5 1852 1 0.93 3 4.7 8 11 43.85 24 29 6.8 64 3575 8 16 50.33 25 4 13.2 1852 1 1.00 3 12.4 8 17 51.33 25 1 0.8 n 3594 8 18 49.30 24 41 14.0 1852 1 0.79 3 14.8 8 19 50.09 24 37 59.2 n 3617 8 21 44.61 24 37 53.7 1852 1 0.71 3 18.4 8 22 45.32 24 34 35.3 o 3635 8 23 14.19 24 38 25.7 1852 1 0.66 320.1 8 24 14.85 24 35 5.6 P 3739 8 33 43.65 22 3 22.4 1852 0 59.41 3 32.6 8 34 43.06 21 59 49.8 t 3861 8 44 28.47 20 35 9.2 1852 0 58.63 3 44.8 8 45 27.10 20 31 24.4 r 4088 9 11 20.31 •f 19 47 4.7 1851 0 54.30 3 58.2 9 12 14.61 + 19 43 6.5 109 8004 17 10 17.56 — 17 34 33.5 1851 0 55.78 1 8.5 17 11 13.34 — 17 35,42.0 118 8219 17 37 48.29 18 2 14.7 1851 0 56.08 — 0 30.4 17 38 44.37 18 2 45.1 127 8437 18 7 43.67 27 5 39.7 1850 0 56.33 + 0 10.7 18 8 40.00 27 5 29.0 140 8458 18 12 4.92 26 29 6.9 1850 0 56.06 0 16.5 18 13 0.98 26 28 50.4 145 8533 18 22 46.65 — 19 4 57.9 1851 0 56.51 + 0 32.5 1823 43.16 — 19 4 24.6 148 Comparison-Stars from Lamont. Page Catalogue. Mean place, 1830.0 Year of Red. to year of comparison. Mean place for beginning of year. No. Vol. VII. comparison. a. 0. in «. in d. a. 8. h. m. s. • , „ m. s. 125 17 27 29.92 — 27 56 2.9 1850 + 1 15.48 — 55.61 17 28 45.40 — 27 56 58.5 125 126 17 52 11.94 27 49 1R50 1 15.54 17 53 27.48 27 49 132 127 18 3 30.24 27 32 1850 1 15.70 18 4 45.94 27 32 137 127 18 10 39 09 26 9 2.5 1850 1 14.55 + 19.27 18 11 53.64 26 8 43.2 143 127 18 11 22.64 18 55 40.5 1851 1 14.12 22.10 18 12 36.76 18 55 18.4 144 128 18 17 7.91 — 26 24 31.1 1850 + 1 14.84 + 31.05 18 18 22.75 — 26 43 0.0 147 The dcclmat,on of the ast of these stars is given in the Munich Zones as -26° 24'; but the agreement of the place with that of our star, so complete man other respects, tha, I have had no hesitation in assuming the minutes as 43, instead of 24, as printed. The decli- of L B A Catl rt ^ TH „'" '"•2> a"d WUh l"e mean betWee" Ar*Cla""er and Washington to 0-.8, although differing from that ot tne B. A. Catalogue by 9". 5. The right-ascensions agree. COMPARISON-STARS. CXVll Comparison-Stars determined at Cape of Good Hope during the first series of Mars-observations. No. Date. Observed Red. to 1849.0. Reduced ". Reduced 6. Mean places, 1849.0. a. 3. in a. in 3. a. 8. k. m. s. o 1 II a. ii A. m. s. • / /; k. m. t. ° i a 35 1849. Nov. 18 6 34 42.03 + 25 16 16.71 — 3 58 +11.49 6 34 38.45 +25 16 28.20 19 42.02 16.25 3.61 11.51 38.41 29.76 21 .... 16.94 ... 11.56 . 28.50 24 42.17 3.67 | ... 38.50 6 34 3?. 45 +25 16 28.82 21 Nov. 21 6 15 29.47 25 7 10.27 — 3.75 + 9.86 6 15 25.72 25 7 20.13 24 29.42 3.83 j . . . 25.59 30 29.65 9.13 3.96 9.95 25.69 19.08 Dec. 1 • . . . 9.83 9.96 t • . • 19.79 2 29.51 12.09 4.01 9.96 25. SO 22.05 3 11.93 9.97 21.90 6 15 25.62 25 7 20.59 25 Nov. 27 6 19 28.16 25 42 23.61 — 3.90 +10.40 6 19 24.26 25 42 34.01 28 28.43 23.62 3.92 10.41 24.51 34.03 29 . . . . 24.92 . . 10.41 .... 35.33 30 28.80 3.97 24.83 6 19 24.53 25 42 34.46 27 Dec. 2 6 21 14.50 25 47 19.15 — 4.00 +10.61 6 21 10.50 25 .47 29.76 1850. Jan. 8 15.07 . . . . . 4.55 . . . 10.52 6 21 10.51 15 1849. Dec. 4 26 2 10.01 . . . + 8.72 .... 26 2 18.73 6 . . . 8.47 . 8.71 .... 17.18 9 .... 9.12 8.67 . . . . 17.79 .... 26 2 17.90 12 Dec. 9 . . . 25 55 40.61 . . . + 7.33 .... 25 55 47.94 10 37.44 • . . 7.32 . . . . 44.76 11 & 48 42.81 38.57 — 4.28 7.31 5 48 38.53 45.88 1850. Jan. 10 42.28 4.62 . . . 37.66 5 48 38.09 25 55 46.19 10 1849. Dec. 11 . . . . 26 22 53.36 + 6.87 .... 26 23 0.23 14 5 44 40.26 55.53 — 4.34 6.80 5 44 35.92 2.33 15 39.93 55.39 4.35 6.78 35.58 2.17 16 » 57.18 6.76 .... 3.94 18 55.12 . . . 6.73 . . . . 1.85 5 44 35.75 26 23 2.10 9 Dec. 20 26 31 47.55 . . . + 5.29 . . 26 31 52.84 21 5 32 16.83 48.83 — 4.44 5.26 5 32 12.39 54.08 22 . . 47.66 . . 5.23 52.89 23 16.98 • .... 4.45 . . . 12.53 26 16.61 46.93 4.49 5.10 12.12 52.03 27 16.95 47.80 4.49 5.07 12.46 52!87 29 16.85 47.41 4.51 5.00 12.34 52.41 31 16.94 l 45.59 4.52 4.94 12.42 50.53 1850. Jan. 3 16.94 48.85 4.54 4.82 12.40 53.67 5 32 12.38 26 31 52.66 8 1849. Dec. 22 . . . . 26 31 22.95 • . . + 4.95 .... 26 31 27.90 23 .... 22.71 . 4.!M 27.62 24 .... 23.27 ... 4.87 .... 28.14 27 ..... 23.44 4.77 .... 28.21 29 22.10 . . 4.64 .... 26.74 31 .... 21.28 ... 4.51 .... 25.79 1850. Jan. 3 . . . . 23.38 4.42 .... 27. 80 . . . . 26 31 27.46 1 1850. Jan. 7 4 56 37.34 26 12 58.60 — 4.44 + 0.54 4 56 32.90 26 12 59.14 8 37 31 13 0.24 4.44 0.51 32.87 13 0.75 . 9 37.47 0.61 4.43 0.48 33.04 1.09 10 37.38 1.67 4.43 0.45 32.95 2.12 12 37.45 1.44 4.42 0.39 33.03 1.83 14 37.51 1.09 4.41 0.34 33.10 1.43 15 37.59 1.21 4.41 0.32 33.18 1.53 16 37.36 0.77 4.40 0.29 32.96 1.06 4 56 33.00 26 13 1.12 17 1849. Dec. 21 6 6 9.71 4.38 6 6 5.33 6 6 5.33 18 1850. Jan. 7 6 8 39.55 — 4.54 6 7 33.01 * 8 39.68 4.55 . . . 35.13 6 7 35.07 For N°. 18, the right-ascension is assumed to be recorded one minute too large. 8e« note to same star under Comparison-Stars from Lalandc. N°. 27, Wrong star observed with mural? CXV111 COMPARISON-STARS. Comparison-Stars determined at Gape of Good Hope during the second series of Mars observations. No. Date. Observed §. Red. to 1852.0. Mean 3 1852.0. No. Date. Observed $. Red. to 1852.0. Mean (J 1852.0. 1852. o 1 II // o / // 1852. o i it ii " i n 101 Jan. 3 +21 16 49.48 +3.53 +21 16 53.01 64 Feb. 13 +2429 1.13 +4.35 +24 29 5.48 64 Jan. 19 24 29 1.46 +3.92 24 29 5.38 14 1.45 4.35 5.80 20 29 1.03 3.94 4.97 16 2.93 4.33 7.25 21 28 58.73 4.00 17 2.36 4.32 6.68 B2 29 0.86 4.04 4.90 18 0.93 4.31 5.24 23 0.80 4.07 4.87 19 3.41 4.30 24 1 .48 4.10 5.58 20 3.20 4.29 26 0.92 4.16 5.08 S3 3.94 4.24 27 1.54 4.19 5.73 24 4.22 ^ CKl 29 0.67 4.25 4.92 +24 29 5.75 Feb. 2 1.85 4.30 6.15 58 Feb. 11 24 55 10.01 +2.94 3 1.53 4.32 5.85 12 8.83 2.89 24 55 11.72 9 2.09 4.36 6.45 13 8.39 2.84 11.23 10 2.30 4.36 6.66 14 8.38 2.78 11.16 12 2.11 4.36 6.47 16 9.71 o 67 +24 55 11.37 Comparison-Stars from Ann Arbor observations. No. Mean place 1856.0. Year of comp. Red. to year of comparison. Mean place for beginning of year. «• d. in «. in §. a. 3. k. m. s. o / // s. n ft. m. s. ° 112 16 49 37 —26 53 0.78 1850 —22.306 +36.468 16 49 15 —26 52 24.31 113 16 50 30 26 57 12.84 1850 22.382 36.030 16 50 8 26 56 36.81 119 17 13 17 27 51 20.28 1850 22.581 24,456 17 12 54 27 50 55.82 120 17 13 48 27 31 52.40 1850 22.526 24.186 17 13 25 27 31 28.21 121 17 14 17 27 49 30.38 1850 22.580 23.940 17 13 54 27 49 6.44 122 17 14 15 17 33 30.92 1851 17.437 19.965 17 13 58 17 33 10.96 125 17 29 11 27 57 16.54 1850 22.649 16.230 17 28 48 27 57 0.31 128 17 44 19 28 1 5.63 1850 22.685 8.322 17 43 56 28 0 57.31 132 17 53 53 27 49 17.89 1850 22.663 3.306 17 53 30 27 49 14.58 134 17 59 25 27 39 29.28 1850 22.635 + 0.402 17 59 2 27 39 28.88 139 18 7 24 ' 27 27 20.40 1850 22.597 — 3.786 18 7 1 27 27 24.19 143 18 12 15 —26 8 41.39 1850 —22.367 — 5.808 18 11 53 — 26 8 47.20 Comparison-Stars from various sources. J5 I j o Red. to year of comp. Mean place for beg. of year. No. Authority. Epoch. Obs'd «. C Obs'd d. tt-i £ • B 6 e e O 9 in «. <\ in 0. a. d. ' *• tx h. m. s. ° t n m. s. / // fi. m. s. a 1 II 35 1825.0 ft .*W R 01 31 OK 1 7 A\ K 49 StruveCatrGen.,931 .... 1830.0 7 45 45.86 +Bi> 1 1 41.0 4 +25 6 20.4 2 4 1849 1852 +1 28.60 +1 19.88 — 1 10.9 —3 17.7 6 34 oo , 85 7 47 5.74 -j-25 16 30.7 +25' 3 2.7 51 Wrottesley, Mem. R.A.S. XXIII, 27 1850,0 74828.17 5 .... 1852 + 6.83 . « • 7 48 35.00 m StruveCat. Gen.,994 .... 1830.0 8 16 32.45 6 +25 5 10.7 6 1852 +1 18.91 —4 10.0 8 17 51.36 +35 1 0.7 83 Hamburg, A. N. XLIII,113 . . 1856.0 8 32 39.23 3 +18 45 25.3 j 3 1852 — 13.72 + 49.5 8 32 25.51 +18 46 14.8 91 Ki>nigsberg, A. N.,XIir, 83 . . 1833.0 8 46 19.89 13 +22 19 30.5 13 1852 +1 6.15 -4 13.6 8 47 26.04 +23 15 16.9 91 Dorpat, A. N. XIII, 243 . . . 1833.0 , 8 46 19.91 6 | +22 19 34.1 5 1852 + 1 6.15 —4 13.6 8 47 26.06 +22 15 20.5 92 Dorpat, A. N. XIII, 243 ... 1833.0 8 46 26.32 2 +22 13 1.1 9 1852 + 1 6.09 —4 13.4 8 47 33.41 +22 8 47.7 141 Altoiia, A. N. VII, 81 .... 1828.0 18 7 44.40 2 —18 51 10. J 1 1851 + 1 21.14 +0 17.1 18 9 5.54 —18 JO 53.2 143 Wrottesley, Mem. R.A.S. XXIII, 39 1850.0 18 11 53 36 5 .... 1850 0.0 18 11 53.36 144 Altona, A. N. VII, 81 . * . . 1828.0 IS 11 IP. 00 3 —18 55 43.04 a 1851 +1 21.16 +0 24.1 18 12 37.16 —18 55 19.0 147 Wrottesley, Mem. R.A.S. XXIII.39 1850.0 18 18 23.50 5 .... 1850 0.0 18 18 22.50 For the Dorpat observation of N°. 91 and the Altoua observation of N°. 141, the declinations are so discrepant that they have not been incorporated into the final means. The latt.T, as published, gives the apparent place ; which has been transformed in this table into the mean place for the beginning of the year. COMPARISON-STARS. CX1X The fewness of the observations from most of the individual sources renders the determina- tion of the constant differences for the results of the respective observers a matter of much difficulty. And it was soon palpable that no trustworthy equation could be obtained for any observer, which would hold even approximately both for the southern stars of the first Venus- series and the northern stars of the three other series of observations. Nor did the several equations to be found in the books appear altogether satisfactory, or accordant. The catalogue of Comparison-stars contains 148 stars, arranged and numbered in the order of their right-ascensions. Of these, N08- 1-35, inclusive, belong to the first Mars-series, and are all situated between 24^° and 26 J° of north declination. Twenty-three stars, between N08- 47-86, inclusive, as well as N08- 87-109, making 46 in all, belong to the second Mars-series, and are between the declinations 19^° and 25° north. Nos- 36-46, as well as seventeen stars between Nos' 47-86, making thirty-nine in all, belong to the second Venus-series , and are situated between 14^° and 25° north declination. So that of all these 109 stars, none are farther north than +26°. 5, and none farther south than + 14°. 5. The first Venus-series, on the other hand, contains thirty-nine stars, N08- 110-148, all of which are between 17^° and 28° of south declination, and comprised therefore within the limits of Argelander's southern zones. Of the special lists, the Santiago determinations comprise the whole list of stars compared with Mars during the second series of observations. The Washington determinations comprise the whole list of southern stars, with one exception, (Venus, I,) and 25 northern ones — 8 for Mars I, 17 for Mars II. The Cape determinations are for 12 stars observed with Mars I, and 3 observed with Mars II. The places from Bessel's zones are, of course, exclusively for northern, and those from Arge- lander's exclusively for southern stars. The twenty stars from Kiimker's catalogue are all northern. Those from the third Greenwich catalogue, and all but one from the Twelve-Year, are northern. The stars from Lamont and Briinnow are all southern. From the positions taken from Lalande, 57 are for northern and 14 for southern stars. Of those from Piazzi, 20 are northern and 6 are southern stars. Of those from Taylor, 22 are northern and 5 are southern. Under these circumstances, it is manifestly most appropriate to refer the northern stars to Bessel as the standard observer, and the southern to Argelander ; and this has been done, for the sake of avoiding as much uncertainty as possible. In order to deduce the corrections neces- sary for reducing the declinations to the standard, all those stars which have been determined by two different authorities have been made (o contribute to the result, and the mean difference for each two observers computed when possible. Thus, we have for the Santiago (northern) determinations by 31 observations, Santiago— Bessel = + 0".56 ± 0".38, and by 17 observations, Washington— Santiago = + 1".06 ± 0".23, one observation being rejected in the latter case by Peirce's Criterion. The Greenwich catalogue of positions for 1850 gives by 23 observations, Bessel— Greenwich = + 0".562 ± 0".503, and by 8 observations, Washington— Greenwich = + 0".66 dt 0".36. Furthermore, we have from 20 observations (the same one being rejected as before,) Washington— Bessel = + 0".44 ± 0".59 ; and lastly, from 9 observations at the Cape, of which two were manifestly to be excluded, but, by reason of their equality on the two sides of the mean, exerted no essential influence on the result, Maclear— Greenwich = + 0".39 ± 0".31. cxx COMPARISON-STARS. The incompatibility of some of these determinations is apparent, and the first five equations require therefore to be combined with one another, according to the method of least squares, after giving to each an appropriate weight. The values resulting from this combination have been adopted. They are: Bessel— Washington = — 0".76 Bessel— Santiago =— 0".06 Bessel— Greenwich =-f-0".23 Hence we also have, Bessel — Maclear = — 0" . 1 6 . For southern stars we obtain, by 20 observations, Argelander— Washington = + F.74 ± 0".40, and by 12 observations, Washington— Ann Arbor = + F.58 ± 0".35, whence, Argelander— Ann Arbor = + 3". 32. These corrections were uniformly applied, as also were the following equations as previously determined for the declinations under consideration, excepting for the one zone of Lalande already mentioned. They are taken from Argelander's Positiones Medice and Southern Zones, Struve's Posiiiones Medice, and Madler's Fixstern-system II, as cited by Dr. Forster in his excellent paper in N°. 1026 of the Astronomische Nachrichten. Bessel— Taylor = — F.32 Bessel— Twelve-Year = — 0".40 Bessel— Eiimker = — 0".70 Bessel — Piazzi = Bessel — Lalande = — 3". 6 for 3= + 15° — 3".3 +20° — 2".8 +25° Argelander— Taylor = + 0".50 — 0".0256 (d° + 19°) Argelander — Piazzi = Argelander — Lalande = — 1". 52 for 3 = — 16° — 1 .23 18° — 0.84 20° — 0.25 22° + 0 .54 24° -I- 1 .30 26° + 1 .90 -28° Lalande's zone of 1796, March 4, contains the stars N03- 70, 74, 81, 89, 94, 97, 100, 101. To these has been applied the correction — 2". 3 in order to reduce them to positions correspond- ing differentially to the places adopted for the fundamental stars in the reduction. Twenty of these were from Riimker, five from the Twelve- Year Catalogue, and one from Argelander's Posi- tiones Medice. The mean by weights of the reductions to Bessel for the totality of these stars is, — 0".60, making the entire correction to Lalande, — 2". 9. The observations thus corrected may be advantageously combined by allowing to each deter- mination a weight proportionate to the product of the number of observations by a factor constant for each authority. This factor should depend not only on the probable error of the authority, but also, in some measure, upon the time elapsed since the observation — that the influence of undetected proper motions may not be too prejudicial. Combining the materials in this way, we may deduce a table of definite places of great pre- cision, which may be practically treated like careful determinations by one and the same observer. So important is it, however, in the present discussion, that all the comparison-stars COMPARISON-STARS. CXXi and all the meridian observations should be really portions of one system referred to the identical co-ordinate plane, that the labor of an additional approximation for the better determination of the personal equations in declination is trivial in comparison with the advantages to accrue from a more trustworthy determination of the corrections to the scale of the standard observer. These are, of course, accompanied by a slight increase in the precision of the adopted places of comparison-stars. , Accordingly, the places deduced from all those authorities, for which the personal equation has not been implicitly taken from the books, have been carefully compared with the table alluded to, in order that the resultant equations, even if not so trustworthy as those deducible from more extended comparisons and investigations, may at least possess an accuracy in some degree proportionate to the influence which they must exert upon the resulting value of the parallax. It is not to be expected, indeed, that the observations from Bessel and Argelander themselves would indicate an absolute mean accordance with our final table ; but it is certainly to be hoped that the positions of that table will be more accordant with the average places of Bessel and A rgelander than would be the case for the limited number of stars taken from the zones of these astronomers and here employed. The discussion of the personal equations soon made it manifest that the results for each planet- series ought to be separately examined, the corrections being, at least in some cases, very clearly more diiferent than may fairly be attributable to the mere difference of the declinations. This was especially evident in the two meridian series at the Cape of Good Hope, but not less distinctly in the stars from the Greenwich Catalogue for 1850. Thus, after incorporating the values given by some additional stars which, although not employed for micrometic comparison, yet required investigation, on account of their import- ance in determining the corrections of the meridian "series at the Cape and at Athens, we have — From twenty-three stars observed with the first Mars-series, Bessel — Greenwich = -f- 1".09 ± 0".995 ; From eight stars observed with the second Mars-series, Bessel — Greenwich = — 0".14 ± 0".772. The table of definite places constructed from the materials already cited need not be given here, as its employment was only provisional. The results of its comparison with the several series of declinations afford the corrections to be employed in the new preparation of a table precisely similar. These corrections afford a legitimate criterion for judging of the accuracy attained and attainable. For they must, of course, be applied to the series of absolute meridian determinations of the planet's place, as well as to the star-places derived from the same authority, before incorporating them with their appropriate weight in the final list of star- places. Only under such conditions would the combination of the absolute positions obtained by meridian observation at different observatories be tolerable. And it so happens that neither for any one of the four observatories which have furnished meridian observations of the planet, nor for either of the other two on which drafts have been made for recent star-determinations, is any sufficient determination of the personal equation in declination at hand. The places of the table are to be considered as representing the general standard of Bessel for the northern, and Argelander for the southern stars. Their comparison with individual authorities furnishes the following equations, in which T denotes the tabular declination : For stars observed with Mars I : T — Greenwich = + 0".099 ± 0".142 from 29 observ'ns, exclud'g three, (NM- 25, 35, 14.) T — Bessel = — 0".287 ± 0".259 from 24 observations, excluding one, (N°- 2.) T — Maclear = — 0".591 ± 0".188 from 14 observations. T — Washington = — 0".517 ± 0".096 from 14 observations. E ° CXXJ! COMPARISON-STARS. For stars observed with Mars II : T Santiago = — 0".120 ± 0".091 from 41 observations. T _ Bessel = + 0".471 ± 0".293 from 32 observations. rp Maclear = 1".325 ± 0".234 from 13 observations, excluding one, (Pollux.) T Greenwich = — 0".056 ± 0".206 from 6 observations, excluding one, (N°- 100.) T Washington = — 0".238 d= />".054 from IT observations, excluding one, (N°- 95.) For stars observed with Venus I : T — Washington = + F.696 ± 0".114 from 38 obs., or excl. 4, (Nos- 112, 127, 141, 144,) = _j_ l".727 ± 0".064. T — Argelander = + 0".063 ± 0".276. T — Ann Arbor = + 3".348 ± 0".261. For stars observed with Venus II : T — Bessel = + 0".136 ± 0".096. The large values of the differences for the observations taken from Bessel's Zones need not be considered as implying any deviation from Bessel's standard, but are, in every case, traceable to deviations of particular zones made manifest by comparison with at least two independent authorities. This discordance or deviation is especially evident in zone 2*75, as will be clearly seen on collation of the equations, which are deduced after the omission of comparisons with the stars of this zone. Thus, the value of (Santiago — Bessel) which, by the use of all thirty-one differences, was found to be -(- 0".565 rt 0".380, was reduced, after exclusion of the four differences dependent on zone 275, to + 0".141-=fc 0".363. So also the value of (Washington— Bessel) which, if the places from zone 275 be employed, is = -j- 0".44 =t 0".59, becomes, after rejection of these, = — 0".06 ± 0".53. And of the three series for Mars I, into which these stars enter appreciably, the equations above given are changed by the omission of this zone to the following : T — Santiago = — 0".089;± 0".086. T — Washington = + 0".1T6 ± 0".056. T — Bessel = + 0".163 ± 0".287. The correction apparently due to these stars is, if constant, about 3", but the observations are much better satisfied if the correction be supposed to change with the time. Since none of the places from this zone are absolutely necessary for our purpose, they have been omitted in taking the final mean, although given in the list for comparison. A somewhat similar case is that of zone 405, which has, however, been retained. From examination and combination of these results, the equations have been ultimately determined which are to be used in connection with the declinations, as furnished by the observatories under consideration. They are as follows, and have been uniformly applied to all measured declinations, whether of star or of planet. The reductions applied to star-places from other sources are employed as cited on page cxx. T - - Washington = — 0".5 for stars observed with Mars I. T- — — 0".2 « » « « Mars 11. T — " = + 1".7 " « « « Venus I. T — Santiago = — 0".l T — Greenwich = 0 - Maclear = — 0".6 for stars observed with Mars I. T — = — l"-3 " « « « Mars II. The declinations from Bessel's Zone 275 are not employed for the mean. The annexed Final List of places of comparison-stars gives for each star the several authorities ; the number of observations from each, both in right-ascension and declination, these numbers COMPAKISON-8TAES. CXX111 being inclosed in a parenthesis and separated by a dot ; the declinations, taken from the special lists and reduced by means of the equations just given to the standard of Bessel for northern, and of Argelander for southern stars ; the mean of the right-ascensions to the nearest second, and for the declinations the rigorous mean by weights ; and lastly, inclosed in brackets, the sum of the several partial weights for the declinations. The factors for the several authorities, which, when combined with the number of observations, constitute the partial weights, are : For Piazzi and Lalande , 1 For Bessel, Taylor, Kiimker, and Lament ... 3 For Struve's and Argelander's Catalogues... 10 For all other sources 5 FINAL LIST OF STAK-POSITIONS. Lalande 9531 Piazzi IV, 287 Bessel 396,533 Taylor 1808 Maclear Greenwich 335 1.1) (8.9) (2.1) (4.4) (8.8) (2.1) [70] 1 A. m, s. 4 56 36.50 36.83 36.70 36.69 36.70 36.56 1850.0. o 1 It + 26 13 5.8 5.8 6.0 6.0 6.0 6.8 Bessel 405 Maclear Greenwich 401 Washington 8 (1.1) (7) (3.4) (3.12) [118] A. m. s. 5 29 33.19 32.90 32.91 1849.0. » / ii + 26 31 29.6 26.9 27.3 27.7 5 29 33 + 26 31 27.44 4 56 37 + 26 13 6.03 Lalande 10669 Maclear Greenwich 406 9 (1.1) (7.8) (7.7) [76] A. m. *. S 32 12.11 12.38 13.53 1849.0. + 26 31 49.0 52.1 51.5 Bessel 396 Greenwich 350 Washington (1.1) (5.5) (3.12) [88] 3 A. m. s. 5 3 4.68 4.64 4.64 1850.0. ° / // + 26 16 16.5 19.8 19.3 5 32 12 + 26 31 51.78 535 + 26 16 19.35 Lalande 11108 Maclear Greenwich 422 1O (1.1) (2.5) (1.1) [31] A. m. a. 5 44 35.76 35.75 34.81 1849.0. « / // + 26 22 58.8 23 1.5 23 1.5 Bssscl 405 Greenwich 361 Washington (1.1) (3.3) (3.10) [68] 3 A. m. f . 5 10 29.92 29.37 29.37 1850.0. 0 t II + 26 551.3 49.1 48.6 5 44 35 + 26 23 1.41 5 10 29 + 26 5 48.82 Bessel 405 Greenwich 426 Washington 11 (1.1) (5.5) (1.10) [78] A. m. *. 5 46 14.93 14.82 14.96 1849.0. * / // + 26 26 47.9 45.9 46.8 Bessel 523 Greenwich 376 Washington (1.1) (4.4) (2.10) [73] 4 h, m. s. 5 17 47.40 47.93 47.91 1850.0. 0 i II + 26 26 51.7 55.4 53.3 5 46 15 + 26 26 46.55 5 17 48 + 26 26 53.81 13 Lalande 11220 (1.1) Piazzi V, 873 (8.8) Taylor 2220 (9.4) Twelve- Year 515 (3.5) Maclear (2.3) Greenwich 433 (3.3) [76] A. m. s. 5 48 37.61 37.45 37.67 37.60 38.09 37.56 1849.0. « i n + 25 55 41.5 44.0 44.2 45.7 / 45.6 46.6 Bessel 405 Greenwich 383 Washington (1.1) (2.2) (3.11) [68] 5 A. m. s. 5 21 43.09 43.27 43.14 1850.0. » / // + 26 27 49.2 45.9 46.6 5 21 43 + 26 27 46.61 Bessel 405 (1.1) [3] 6 A. m. «. 5 22 32.26 1849.0. 0 / // + 26 34 5.9 5 48 38 + 25 55 45.38 Rumker 1673 Greenwich 438 Washington 13 (1.1) (8.6) (1.10) [83] A. m. s. 5 54 3.71 3.94 3.94 1849.0. • / // + 26 16 30.8 30.6 30.1 5 22 32 + 26 34 5.9 Bessel 405 (1.1) [3] T A. m. «. 5 25 40.14 1849.0. o ; // + 2627 2.6 5 25 40 + 2627 2.6 5 54 4 + 26 16 30.31 CXX1V COMPARISON-STARS. Final List of Star-Positions — Continued. Bessel 405 RUmker 1680 Greenwich 439 Washington (1.1) (1.1) (2.3) (1.11) [76] 14 h. m. s. 5 54 28.72 28.09 28.46 27.73 1849.0. + 2621 2.1 20 59.6 20 57.9 21 0.6 Bessel 523 (1.1) [3] 23 ft. m. s. 6 17 58.70 1849.0. 0 / // + 25 27 23.6 6 17 59 + 25 27 23.6 Bessel 348 (1.1) [3] 24 A. m. s. 6 18 45.23 1849.0. o 1 It + 24 20 31.0 5 54 28 + 26 21 0.09 Lalande 11684 Bessel 405 RUmker 1737 Maclear Greenwich 451 (ID (1.1) (5.5) (3) (6.6) [64] 15 A. m. s. 6 1 30.72 30.64 30.52 30.57 1849.0. + 26 2 14.0 16.4 15.0 17.3 16.1 6 18 45 + 24 20 31.0 Lalande 12336, 7 (2.2) Bessel 523 (1.1) Maclear (3.3) Greenwich 479 (1.1) 35 A. tn. s, 6 19 24.16 24.62 24.53 23.83 1849.0. + 25 42 32.2 33.4 33.9 30.6 6 1 31 + 26 2 16.10 Lalandt 11714 Bessel 405 Greenwich 453 (1.1) (1.1) (6.4) [24] 10 A. tn. s. 6 2 22.10 32.20 22.31 1849.0. + 26 0 39.3 43.9 41.7 6 19 25 + 25 42 33.04 Bessel 523 (1.1) Greenwich 485 (2.2) [13] •86 *• ">• «• 6 21 2.59 2.27 1849.0. 0 i it + 25 14 26.6 27.0 6 2 22 + 26 0 41.88 Lalande 11854 Maclear Greenwich 457 (1.1) (1) (5.5) [26] IT A. tn. s. 6 6 5.03 5.33 5.33 1849.0. 0 / // + 25 22 23.9 23.1 6 21 2 + 25 14 26.91 Lalande 12395 (1.1) Maclear (2) Greenwich 487 (1.2) [11] 3T A. tn. s. 6 21 9.61 10.51 10.68 1849.0. + 25 46 38.1 40.8 665 + 25 22 33.13 Lalande 11946 RUmker 1783 Maclear Greenwich 458 (1.1) (1.1) (2) (4.4) [24] 18 A. m. a. 6 7 35.06 35.27 35.07 35.12 1849.0. 0 / // + 25 32 18.3 15.8 22.8 6 21 11 + 35 46 40.55 Bessel 523 (1.1) Greenwich 488 (2.2) [13] 38 A. tn. s. 6 21 36.16 36.24 1849.0. 0 / // + 25 31 15.4 16.5 6 7 35 + 25 32 21.74 Lalande 11976, Greenwich 459 3 (S.2) (2.2) [12] 19 A. m. s, 6 9 25.10 26.16 1849.0. "til + 25 35 3.3 2.6 6 21 36 + 25 31 16.25 Greenwich (1.1) [5] 29 A. m. s. 6 25 26.67 1849.0. 0 / // + 26 33 51.6 6 926 + 25 35 2.70 Bessel 405 Greenwich 467 (1.1) (4.3) [18] 20 A. T71. 8, 6 11 31.75 31.81 18490. 0 I II + 25 45 49.0 45.7 6 25 27 + 26 33 51.6 Lalande 12554 (1.1) Bessel 405 (1.1) Greenwich 490 (1.1) [9] 30 A. m. s. 6 25 44.14 44.74 44.27 1849.0. + 25 1 57.8 59.2 56.0 6 11 32 + 25 45 46.25 Lalande 12197, £ Bessel 405 Taylor 2456 Maclear Greenwich 470 (2.2) (1.1) (6.6) (4.5) (2.2) [58] A. Tn. s. 6 15 25.35 25.82 25.64 25.62 25.65 1849.0. + 35 7 16.7 20,8 19.9 20.0 30.9 6 25 44 + 25 1 57.27 Lalande 12557 (1.1) Greenwich 491 (1.1) [6] 31 A. m. s. 6 25 47.09 46.64 1849.0. 0 , // + 24 44 45.4 44.4 6 15 26 + 25 7 20.05 Lalande 12237 Bessel 405 Greenwich 473 (1.1) (1.1) (4.2) [14] 22 A. tn. 8. 6 16 47.33 46.93 46.90 1849.0. « / H + 25 35 28.4 25.8 24.3 6 25 47 + 24 44 44.57 Bessel 348 (1.1) Greenwich 495 (1.1) [8] M A. m. s. 6 27 21.07 21.09 1849.0. + 24 32 48.7 6 16 47 + 25 35 24.84 6 27 21 + 24 3i 49.08 COMPARISON-STARS. Final List of Star-Positions — Continued. cxxv Bessel 348 (1.1) Greenwich -196 (1.1) [8] 33 A. m, s. 6 27 52.80 52.67 1849.0. + 24 31 4.5 4.9 Lalande 15125 (1.1) [1] M A. m. *. 7 38 57.81 1852.0. « / ii + 15 53 0.6 7 38 58 + 15 53 0.6 6 27 53 + 24 31 4.75 Lalande 15221 Bessel 339 (1.1) (1.1) w M A. m. s. 7 41 51.39 51.67 1852.0. o / // + 24 9 13.3 12.5 Lalande 12666 (1.1) Bessel 348, 405 (2.2) m 31 A. m. s. 6 28 45.41 46.37 1849.0. + 24 57 28.6 23.7 7 41 52 + 24 9 12.70 6 28 46 + 24 57 24.40 Lalande 15338 (1.1) [1] 46 A. m. s. 7 44 52.83 1852.0. + 15 58 40.4 Lalande 12880 (1.1) Taylor 2632 (17.45) RUmker 1979 (16.13) Twelve- Year 587 (22.19) Maclear (3.3) Greenwich 505 (8.7) [320) 35 /t. in. s. 6 34 38.43 38.46 38.31 38.40 38.42 38.37 1849.0. ° / // + 25 16 25.7 29.0 30.3 30.1 28.2 32.0 7 44.53 + 15 58 40.4 Lalande 15401 Santiago (1.1) (3.3) [16] 47 - A. m. «. 7 46 36.34 36.58 1852.0. o i n + 24 44.48.1 50.9 6 34 38 .+ 25 16 29.76 7 46 36 + 24 44 50.72 Bessel 276 (1.1) [3] 36 h. m. s, 7 26 52.19 1852.0. o / // + 15 15 1.4 Lalande 15412 Santiago (1.1) (3.3) f!6] 48 A. m. a. 7 46 52.98 57.25 1852.0. 0 1 II + 24 36 41.7 49.0 7 26 52 + 15 15 1.4 7 46 57 + 24 36 48.54 Bessel 273, 276 (2.2) m 37 h. m. s. 7 29 28.30 1852.0. + 15 24 42.2 Bessel 341 (1.1) Struve Cat. Gen. (4.4) Santiago (3.3) [58] 49 A. m. s. 7 47 5.64 5.74 5.71 1852.0. 0 1 II + 25 3 0.0 2.7 3.2 7 29 28 + 15 24 42.2 Bessel 146 (1.1) [3] 38 A. m. s, 7 29 28.97 1852.0. " // + 14 40 6.9 7 47 6 + 25 3 2.69 Bessel 339 (1.1) [3] 30 A. tn. s, 7 47 14.74 1852.0. 0 / // + 24 0 37.9 7 29 29 + 14 40 6.9 Bessel 273 (1.1) [3] 39 h. m. s. 7 30 38.00 1852.0. » / // + 14 53 36.6 7 47 IS + 24 037.9 Lalande 15468 Taylor 3306 RUmker 2335 Twelve- Year Wrottesley (1.1) (5.7) (3.2) 709 (6.5) (5) [53] 51 A. m. t. 7 48 35.29 35.19 35.08 35.04 35.00 1852.0. o i a + 16 10 56.8 59.3 53.8 52.4 7 30 38 + 14 53 36.6 Bessel 273 (1.1) P] 40 h, m. 8. 7 30 58 15 1852.0. + 14 47 39U 74835 + 16 10 52.60 7 30 58 + 14 47 39.1 Bessel 339,341 Santiago (2.2) (5.5) [31] n A. m. 5. 7 48 38.35 38.31 1852.0. • / /; + 24 54 9.2 11.7 Bessel 273, 276 (2.2) [6] 41 A. m. s. 7 32 44.34 1852.0. o ( // + 15 40 22.0 7 32 44 + 15 40 22.0 7 48 38 + 24 54 11.22 Lalande 14961 (1.1) Bessel 62, 146 (2.2) [7] M H. m. i. 7 33 42.26 42.38 1852.0. ° i n + 14 33 0.2 0.9 Lalande 15548 (1.1) [1] S3 A. m. *. 7 50 53.27 1852.0. « / // + 23 3450.1 7 50 53 + 23 34 50.1 7 33 42 + 14 33 0.80 Bessi'l 339 Santiago (1.1) (3.3) [18] B4 A. m. «. 7 50 59.17 59.58 1852.0. 9 1 II + 24 38 27.8 27.0 Bessel 273 (1.1) [3] 43 A. m. s. 7 33 49.55 1852.0. + 15 49 51.1 7 33 50 + 15 49 51.1 7 50 59 + 24 28 27. CXXV1 COMPARISON-STARS. Final List of Star -Positions — Continued. Lalande 15608 (1.1) Bessel 339 (1.1) Santiago (3.3) [19] 55 A. m. s. 1 52 38.26 38.37 38.37 1852.0. " 1 II +24 18 57.3 59.0 68.7 Lalande 16288,90,91 (3.3) Piazzi VIII, 41 (12.8) Bessel 344 (1.1) Taylor 3519 (6.5) HUmker 2476 (3.3) Twelve- Year 745 (12.17) Santiago (32.33) Greenwich 608 (7.7) Maclear (1.8) [413] 04 A. m. s. 8 11 42.78 43.68 43.39 43.85 43.66 43.68 43.69 43.82 1852.0. + 24 29 0.2 2.7 1.4 5.4 2.0 3.1 2.7 3.7 4 4 7 52 38 +24 18 58.67 Bessel 273 (1.1) Rllmker (1.1) [6] 56 h. m. a. 7 53 31.44 31.56 1852.0. 0 / // + 1558 1.3 1.4 8 11 44 + 24 29 3.29 7 53 31 + 15 58 ] .35 Bessel 273 (1.1) m 65 h. m. a. 8 11 51.45 1852.0. 0 1 II + U 55 48.5 Bessel 341 (1.1) Santiago (15.15) [78] 57 h. T/I. a. 7 55 2.91 3.29 1852.0. 0 1 II +25 0 23.2 30.8 8 11 51 + 15 55 4B.5 Santiago Washington (2.2) (2) [20] 6G A. in. a. 8 13 9.72 1852.0. + 24 29 21.3 23.7 7 55 3 +25 0 20.89 Lalande 15707 (1.1) Bessel 339, 341 (2.2) Greenwich 589 (3.3) Santiago (6.6) Maclear (3) [67] 58 h. m. s. 7 55 15.43 15.60 15.48 15.59 1852.0. 0 / // +24 55 6.9 9.0 10.8 10.2 10.1 8 13 10 + 24 29 22.50 Bessel 273 (1.1) [3] 67 A. m. f. 8 14 58.99 1852.0. + 15 44 33.5 8 14 59 + 15 44 33.5 7 55 15 +24 55 10.16 Lalande 16477 Bessel 344 Santiago Washington (1.1) (1.1) (3.8) (2) [29] 68 A. m. s. 8 16 5.83 8.46 8.37 1852.0. + 2425 7.7 1.7 5.9 5.3 Bessel 378,379 (2.2) [6] 59 A. m. s, 7 59 15.42 7 59 15 1852.0. ° / // +22 50 45.4 +22 50 45.4 8 16 8 + 24 25 5.32 Bessel 341 (1.1) Santiago (3.3) [18] 60 A. m, a, 7 59 24.42 24.13 1852.0. 0 1 II +24 52 39.4 42 3 Lalande 16464 Bessel 344 Santiago Washington (1.1) (1.1) (2.2) (1) [19] 69 h. m. s. 8 16 35.74 35.65 35.76 1852.0. +24 1 30.3 32.7 31.9 32.1 7 59 24 +24 52 41.83 Lalande 16068 (1.1) [1] 61 h, m> s, 8 5 27.00 1852.0. o / // +16 4 20.7 8 16 36 +24 1 31.99 Lalande 16582 Bessel 278 (1.1) (1.1) M 70 A. m. a. 8 19 29.34 29.49 1852.0. +21 38 19.6 14.7 8 5 27 +16 4 20.7 Bessel 341 (1.1) Santiago (6.6) [33] M A. m. a. 8 6 15.64 16.01 1852.0. « / // +24 47 1.2 0.1 8 19 26 +21 38 15.92 Santiago (4.4) [20] 71 A. tn. 8. 8 19 47.03 1852.0. oil! + 24 9 40.5 8 6 16 +24 47 0.20 Lalande 16236 (1.1) Bessel 278 (1.1) M 63 A. m. s. 8 10 14.53 14.30 1853.0. ° / // +21 57 0.6 57 3.8 8 19 47 + 24 9 40.5 Santiago (3.3) [15] lit A. m. s. 8 19 49.74 1852.0. + 34 19 43.1 8 10 14 +21 57 3.00 8 19 50 + 24 19 -13.1 COMPARISON-STABS. Final List of Star-Positions — Continued. CXXVll Santiago (2.2) [10] 73 h, m. s. 8 20 54.98 1852.0. + 24 530.9 Bessel 274 (1 [3] •1) 84 h. m. s. 8 32 35.87 1852.0. « / tn + 19 0 43.0 8 20 55 + 24 530.9 8 32 36 + 19 0 43.0 Lalande 166 (1.1) [1] 7* h. m. s. 8 21 43.73 1852.0. o 1 II + 21 20 54.3 Bessel 278, 344 Santiago Washington [26] (2.2) (2.2) (2) 85 h. m. 5. 8 35 6.84 6.61 1852.0. 0 1 11 + 23 14 31.6 31.3 32.0 821 44 + 21 20 54.3 Bessel 373 (1.1) Rllmker A. N. Till, 13 (1.1) [6] 75 A. m. s. 834 24.81 24.81 1852.0. 0 / // + 15 46 19.4 80.9 8 35 7 + 23 14 31.64 Bessel 274 [31 (1.1) 8 h. m. a. 8 39 24.80 1852.0. « / // + 18 35 42.7 8 24 25 + 15 46 20.15 8 39 25 + 18 35 42.7 Bessel 273 (1.1) [3] T6 h. m, s. 8 26 58.52 8 26 59 1852.0. « / // + 16 14 7.8 + 16 14 7.8 Bessel 344 Santiago [13] (1.1) (2.2) 87 h. m. s. 8 40 18.10 17.65 1852.0. ° / it + 22 44 41.3 42.3 Santiago • (3.3) [15] 77 h. m. s. 8 27 31.61 1852.0. « / // + 2358 5.5 8 40 18 + 22 44 42.07 Bessel 278 Santiago [23] (1.1) (4.4) 88 A. m. s, 8 44 14.84 15.23 1852.0. 0 / // + 22 33 34.7 33.6 827 32 + 23 58 5.5 Santiago (3.3) [15] 78 h. m. s. 8 28 2.93 1852.0. • / // + 23 34 17.2 8 44 15 + 22 33 33.74 Lalande 17513 Bessel 278, 345 Greenwich 640 Santiago [52] (1.1) (2.2) (6.6) (3.3) 89 A. m. s. 8 45 28.00 28.02 27.95 27.91 1852.0. » / // + 22 51 38.5 38.0 37.6 38.7 8 28 3 + 23 34 17.2 Bessel 344 (1.1) Santiago (3.3) Washington (1) [23] 79 h, m. s. 8 28 14.72 14.64 1852.0. 0 / // + 23 45 40.6 37.9 36.6 8 45 28 + 22 51 37.98 Bessel 278 Santiago Washington [28] (1.1) (3.3) (2) 90 A. m. s. 8 45 57.84 58.07 1852.0. + 22 22 45.2 44.3 45.7 8 28 15 + 23 45 37.97 Santiago (3.3) Washington (1) [20] SO h. m. 5. 8 30 11.69 1852.0. « / // + 23 24 21.1 22.5 8 45 58 + 22 22 44.90 Bessel 278 (1.1) Santiago (4.4) Washington (1) Kiinigsberg A. N. 294 (13.13) Dorpat A. N. 303 (6.5) [95] 91 A. m. x. 8 47 26.12 26.09 36.04 26.06 1852.0. « ; // + 22 15 15.0 15.3 16.1 16.9 (20.5) 8 30 12 + 2324 21.45 Lalande 17013 (1.1) Piazii VIII, 121 (4.4) RUmkerA N. VIII, 19 (1.1) [8] 81 h. m. t. S 31 11.55 11.09 11.49 1852.0. * / // + 20 36 11.6 12.8 11.7 8 47 26 + 22 15 16.45 8 31 11 + 20 36 12.24 Bessel 278 Santiago Dorpat A. N. 303 [38] (1.1) (3.3) (2-2) M A. m. s. 8 47 32.84 32.71 32.41 1652.0. « / // + 22 846.3 46.8 47.7 Santiago (3.3) [15] 83 h. m, s. 8 31 40.84 1852.0. 0 / /. + 23 16 11.8 8 47 33 + 22 8 47.07 8 31 41 + 23 16 11.8 Bessel 278 Twelve-Year 789 Greenwich 645 Santiago [63] (1.1) (5.6) (4.4) (2.2) 93 A. fn. s. 8 48 54.49 54.40 54.48 54.43 1859.0. « / // + 21 54 57.4 57.3 58.9 58.7 Bessel274 (1.1) Rtlmker2613 (1.1) Hamburg A. N. 1016 (3.3) [21] 83 A. m. s. 8 32 25.23 25.02 25.51 1852.0. " . I i. + 18 46 12.9 15.3 14.8 8 32 25 + 18 46 14.60 84854 + 21 54 57.61 CXXV111 COMPARISON-STARS. Final List of Star-Positions— Continued. Lalande 17690 Besscl 278 Twelve-Year 795 Santiago Washington (1.1) (1.1) (5.6) (6.6) (1) [69] 04 h. m. s. 8 50 25.94 25.60 25.52 25.60 1852.0. * / // + 21 44 17.9 15.4 13.7 12.8 13.8 Besscl 275 Santiago (1.1) (2.2) [10] 103 h. m. s. 9 7 22.07 22.38 1851.0. ° / // + 19 51(42.8) 45.7 9 7 22 + 19 51 45.7 Riimker 2799 Santiago (1.1) (2.2) [13] 104 A. m. s. 9 7 36.85 37.01 1851.0. 0 / // + 20 41 22.1 24.2 8 50 36 + 21 44 13.45 Bessel 278 Santiago Washington (1.1) (3.3) (1) [23] 95 h- m. s. 8 52 12.29 13.18 1853.0. 0 / // + 22 2 30.6 29.7 27.1 9 7 37 + 20 41 23.72 Riimker 2800 Santiago (1.1) (3.3) [18] 105 h. m. s. 9 7 39.29 39.52 1851.0. « / // + 2028 1.5 27 59.6 8 52 13 + 22 2 29.25 Bessel 278 Santiago Washington (1.1) (3.3) (2) [28] 96 h. m. s. 8 53 47.48 47.20 1852.0. « / // + 21 34 9.5 8.1 8.9 9 7 39 + 20 27 59.92 Bessel 275 Santiago (1.1) (2.2) [10] 106 h. m. s. 9 8 10.57 10.96 1851.0. + 19 52(22.3) 26.2 8 53 47 + 21 34 8.54 Lalande 17937 Bessel (275), 278 Santiago Washington (1.1) (2.1) (5.5) (2) [36] 97 h. m. s. 8 58 16.44 16.32 16.46 1852.0. o / // + 21 6 21.5 (24.4) 22.7 23.4 9 8 11 + 19 52 26.2 Santiago Washington (4.4) (1) [25] ior h. m. s. 9 8 11.21 1851.0. + 20 15 48.4 49.6 858 16 + 21 622.86 9 8 11 + 20 15 48.64 Bessel 278 Santiago Washington (1.1) (3.3) (2) [28] 98 h. m. s. 8 59 27.25 27.31 1852.0. ° / // + 21 29 20.6 20.7 23.4 Bessel 375 Santiago Washington (1.1) (3.3) (2) [25] 108 h. m, s. 9 10 18.62 18.37 1851.0. 0 / // + 20 2(35.1) 39.2 40.5 8 59 27 + 21 29 21.65 9 10 18 + 20 2 39.72 Bessel 277,278 Santiago (2.2) (2.2) [16] 99 &. m. s. 9 3 20.29 20.26 1852.0. 0 / // + 20 57 20.4 22.0 Piazzi IX, 50 Taylor 4088 Riimker 2830 Santiago Washington (5.5) (4.4) (3.3) (2.2) (1) [41] 109 /(. m. $. 9 12 14.18 14.61 14.30 14.29 1851.0. + 19 43 3.4 5.2 3.6 4.9 6.8 9 320 + 20 57 21.40 Lalande 18105 Bessel (975),277 Greenwich 659 Santiago (1.1) ,278 (3.2) (3.3) (2.2) [32] 100 h. tn. •;. 9 3 19.34 19.67 19.49 19.79 1852.0. 0 1 II + 21 1 48.8 (45.6) 48.4 44.9 9 12 14 + 19 43 4.75 Lalande 30556 Washington (1.1) P) [36] 110 h. m. s. 16 40 55.21 1850.0. o / // — 26 28 28.8 27.9 9 3 20 + 21 146.79 Lalande 18132 (1.1) Bessel 278 (1.1) Twelve- Year 809 (5.6) Greenwich 661 (5.5) Santiago (3.3) Maclear (1.1) [79] 101 A. m. s. 9 4 16.61 16.49 16.47 16.43 16.55 1852.0. 0 / // + 21 16 57.5 53.3 52.2 51.1 51.3 51.7 16 40 55 — 26 28 27.92 Argelander Washington (1.1) (4) [25] 111 /(.. m. s. 16 42 56.13 1850.0. — 26 39 29.5 30.9 16 42 56 — 26 39 30.62 9 4 16 + 21 16 51.76 Bessel 275 Santiago Washington (1.1) (3.3) (1) [20] 103 ft. m. s. 9 4 23.04 23.45 1851.0. o / II + 20 37 (50.2) 52.7 53.7 Argelander Washington Ann Arbor (3.3) (3) (1) [35] 113 h. m. s. 16 49 11.81 15 1850.0. 0 / II — 21 52 19.3 22.1 21.0 9 4 23 + 20 37 52.95 16 49 12 — 26 52 20.74 COMPA RISON-STAES. Final List of Star-Positions — Continued. CXX1X A rer lander Washington Ann Arbor (3.3) P) (1) ps] 113 h. m. 3. 16 50 4.99 8 1850.0. « 1 II — 26 56 35.3 a-,. 7 33.5 Lalandc 31791, Argelamtor 2 (2.2) (2.2) [12] 133 A. m. s. 17 21 17.78 17.73 1851.0. 0 i ii — 17 41 14.0 12.1 17 21 18 — 17 41 12.42 16 50 5 — 26 56 35.21 Lalandc 31931, Washington 2 (2.2) (5) [27] IM A. m. £. 17 25 18.17 1851.0. * i n — 17 43 34.9 32.5 Lalimdfi 30874 Argelander \Va.-liir.gton (1.1) (1.1) (4) [26] 114: h. m. s. 16 51 59.6 59.ll 1850.0. • / u — 27 1 12.1 17.2 18.1 17 25 18 — 17 43 32.68 16 51 59 — 27 1 17.70 Lament Washington Ann Arbor (2.1) (4) (1) [28] 125 A. m. s. 17 28 45.40 48 1850.0. • 1 1' — 27 56 58.5 57.3 57.0 Afgeiaodw "Washington (3.3) (4) ps] 115 A. fn. 1. 16 54 41.98 1850.0. o / // — 26 59 41.4 41.4 17 28 45 — 27 56 57.38 16 5-1 42 26 59 41 4 Argelander Washington (1.1) (3) [20] 126 A. m. I. 17 32 1.30 1851.0. 9 i ii — 17 59 52.4 52.0 Argclasder Wellington (1.1) (4) ps] 116 h. m. s. 16 59 44.18 1850.0. — 27 11 48.4 47.0 17 32 1 — 17 59 52.10 16 59 44 27 11 47.28 Lalande 32426 (1.1) Piazzi XVII, 221 (8.9) Taylor 8219 (3.3) Aigelandrr (2.2) Washington (6) . [59] 127 h. m. s. 17 38 44.31 44.23 44.37 44.48 1851.0. 0 f // — 18 2 47.2 44.1 44.6 45.2 42.2 Argelander Washington (3.3) w [35] 11T A. m. s. 17 7 7.73 1850.0. • ; // — 2723 9.6 8.1 17 7 8 — 37 23 8.74 Piaz/.i XVH, 43 (14.15) TaUur 8004 (4.3) Argdandor (1-1) Twelve-Year 1467 (5,4) Wellington (4) [69] 118 A. m. s, 17 11 13.18 13.34 13.39 13.03 1851.0. o / // — 17 35 42.3 41.5 40.9 44.6 42.3 17 38 44 — 18 2 43.45 Washington Ann Arbor (4) (1) [ 128 A. m. .. 17 43 52 56 1850.0. ° i ii — 28 0 54.6 54.0 17 43 52 — 28 0 54.48 17 11 13 17 35 4° 76 Lalandc 32706 Argelander Washington (1.1) (2.2) (4) [31] 129 A. m. ». 17 46 22.86 . 22.57 1851.0. « / // — 18 15 24.1 29.1 27.8 Washington Ann Arbor (S) (1>- po] 119 h. m. s. 17 12 50 54 1850.0. ° / // — 27 50 53.0 52.5 17 12 50 17 46 23 — 18 15 28.10 Argelander Washington Ann Arbor (2.2) (4) (1) [35] 120 h. m. s. 17 13 22.27 25 1850.0. « / n —27 31 34.2 24.8 24.9 Lalandc 32727 Washington (1.1) (4) [21] 130 A. m. s. 17 47 13.77 1850.0. « / // — 28 2 3.7 5.5 17 13 22 — 27 31 24.64 17 47 14 — 28 2 5.41 Washington Ann Arbor (1) (1) |10] 121 A. m. s. 17 13 51 54 1850.0. ° i ii — 27 49 2.2 3.1 Washington («) [20] 131 A. m. s. 17 52 24 1850.0. " i ii — 27 51 58.2 17 53 24 27 51 58 2 17 13 51 — 27 49 2.65 Lalandc 32974 Lamont Washington Ann Arbor (1.1) (1) (4) (1) [26] 132 A. m. f. 17 53 27.86 37.48 30 1850.0. o / /; — 27 49 10.4 10.4 11.3 Lalandi> 31513 Piaz/.i XVII, 63 Washington Ann Arbor (1.1) (13.8) (*) (1) [34] im A. m. s. 17 13 55.45 55.18 58 1851.0. » / // — 17.33 7.5 9.8 8.9 7.6 17 13 55 — 17 33 8.88 17 53 28 — 27 49 10.57 cxxx COMPARISON-STARS. Final List of Star-Positions— Continued. Argelander Washington (1.1) (4) [^ 133 1850.0. h. m. s. oil, 11 55 54.16 — 27 50 11.9 • 8.8 Lalande 33598 (1.1) Altona, AN. 149 (2.1) Argelimilcr (4.4) Washington 13) [36] 141 h. m. a. 18 9 5.85 5.54 5.49 1851.0. — 18 50 47.3 (53.2) 49.6 47.4 175554 —2750 9.4-2 Washington Ann Arbor (4) (1) [25] 134 1850.0. h. m. s. o / /' 17 59 6 _27 39 25.4 2 25.6 18 9 5 — 18 50 48.62 Washington (3) [15] 143 k. m. s. 18 9 30 1850.0. 0 / // — 25 59 9.6 17 59 G —27 39 25.44 18 9 30 — 35 59 9.6 Lamont (4.1) Wrottesley (5) Washington (3) Ann Arbor (1) [23] 143 h. m. s. 18 11 53.64 53.36 53 1850.0. — 20 8 43.2 42.4 43.9 Lalamle 33214 Argelander Washington (1.1) (1.1) (4) [25] 133 1850. C. h. m. s. ° / // 175950.16 —2744(53.7) 50.52 45 1.7 1.5 18 11 53 — 26 8 42.83 !• 59 50 —27 45 1.54 Lalande 33748 (1.1) Altona Atf., 149 (3.2) Lamont (2.1) Washington (3) [29] 144 h. m. s. 18 12 37.55 37.16 36.76 1851.0. 0 i n — 18 55 14.7 19.0 18.4 14.1 Lalande 33394 Argelander Washington (1.1) (3.3) (4) [36] 136 1850.0. h. in. s. or// 18 4 7.34 —25 10 43.6 7.37 54.0 53.0 18 12 37 18 4 7 —25 10 53.16 Piazzi XVIII, 41 (4.4) Taylor 8458 (3.4) Washington (4) [36] 145 k. m. s. 18 13 0.66 0.98 1850.0. — 26 28 46.4 49.8 48.7 Lalande 33427, Lamont Washington 8 (2.2) (1) (4) [22] 137 1850.0. h. m. s. o t ii 18 4 45.71 J-27 32 5.3 45.94 8.9 18 13 1 — 26 28 48.81 18 4 46 — 27 32 8.57 Lalande 33855 (1.1) Argelander (1.1) Washington (5) [31] 146 h. m. s. 18 15 19.59 19.17 1850.0. 0 / II — 26 33 49.9 51.2 54.1 Argelander Washington (2.2) (3) [25] 138 1850.0. h. m. s. ° / n 18 6 40.46 —25 45 4.0 6.5 18 15 19 — 26 33 53.50 18 6 40 — 25 45 5.50 Lalande 33989 (1.1) Lamont (4.2) Argelander (1-1) Wrottesley (5) Washington (6) [42] 14T k. m. s. 18 18 22.92 22.75 22.86 22.50 1850.0. 0 1 II Washington Ann Arbor (3) (1) [20] 139 1850.0. h. m. s, 01 it 18 7 —27 27 19.0 1 20.9 — 26 42 53.8 43 0.0 42 58.8 • 43 1.0 18 7 1 —27 27 19.48 18 18 23 — 26 43 0.54 Piazzi XYIII, Taylor 8347 Washington 24 (44.31) (5.4) (4) [63] 1*0 1850.0. h. m, s. 01 n 18 8 39.86 —27 5 25.2 40.00 28.2 26.8 Piazzi XTOI, 95 (14.10) Taylor 8533 (3.4) Argelander (3.3) Washington (4) [57] 14S h. m. 8. 18 23 42.99 43.16 42.99 1851.0. 0 1 II — 19 4 24.2 24.1 24.0 23.8 18 8 40 — 27 5 26.28 18 23 43 — 19 4 23.99 COMPARISON-STARS. CXXX1 A few of these stars exhibit indications of a proper motion, which, although hardly marked enough to warrant the adoption of any theory upon the subject, yet render it proper to intro- duce into the ultimate determination from the data at command a term dependent upon the time. This has been done for four stars, viz: Nos- 12, 94, 101, and 1 )9 ; and the redetermi- nation of these upon the hypothesis of a proper motion gives the following results. The second column shows the place as given by the observer, after reduction to the mean equinox of the epocli ; and the third contains this observed place as reduced to the scale of the standard observer. The remaining two give the assumed place and the residual discordance, upon the supposition of a proper motion : 12. 94. Observed. Reduced. Computed C— O. Observed. Reduced. Computed C— O. 0 / II // // /; 0 1 II // n /; Lahuulc .... +25 55 44.3 46 8 41 5 44 0 42.6 43 2 +1.1 0 8 Lalande .... +21 44 20.8 15 4 17.9 15 4 18.1 15 3 +0.2 Q i Taylor 45.5 44.2 45 1 4-0 9 14 1 13 7 14 3 +0 6 Twelve-Year . . . 46.1 45.7 45.5 —0.2 Santiago .... 12.8 12.8 13.1 +0.3 Miirlfnr .... 46.2 45.6 45.9 +0.3 Washington . . . 14.0 13.8 12.8 —1.0 Greenwich .... 46.6 46.6 46.1 —0.5 The mean by weights is +25° 55' 45".38 ; but the assumption of a The mean by weights is +21° 44' 13". 45 ; but the assumption of a proper motion of +0".055 gives +25° 55* 45". 84, which has been proper motion of — 0".080 gives +21° 44' 13". 14, which has been adopted. adopted. 101. 109. Observed. Reduced. Computed. C-O. Observed. Reduced. Computed C— 0. ° / */ // n // 0 / // // lf /; Lalande .... +21 16 60.4 57.5 56. » —0.6 + 19 43 6.7 3.4 3.1 —0.3 53.3 53.3 53.7 +0 4 6 5 5 3 4 8 0 4 Twelve-Year . . . 52.7 52.2 52.5 +0.3 Uiimker .... 4.3 3.6 4.8 +1.2 Maclcar .... 53.0 51.7 51.2 -0.5 Santiago .... 5.0 4.9 5.5 +0.6 Santiago .... 51.3 51.3 51.2 —0.1 Washington . . 7.0 6.8 5.7 —1.1 Greenwich .... 51.1 51.1 51.2 +0.1 The mean by weights is +21° 16' 51". 76; but the assumption of a The mean by weights is +19° 43' 4". 75; but the assumption of a proper motion of — 0".092 gives +21° 16' 51". 22, which has been proper motion of +0".037 gives +19° 43' 5". 50, which has been adopted. adopted. Fourteen of our 148 stars are to be found in the Catalogue of the British Association, viz : NO. NO. B.A.C. NO. No. B.A.C. NO. NO. B.A.C. 1 1562 64 2729 140 6194 12 1896 109 3181 143 6214 21 2058 118 5839 147 6261 35 2194 125 5946 148 6301 51 2G89 130 6063 To eight of these stars a proper motion is assigned in the British Association Catalogue. It seems probable, however, only for two of these eight, and has in each case the contrary sign to those deduced above. For N°- 12, it is given as certainly not existing. The discrepance is generally great, amounting in one case to 2'- in right-ascension, and 20". 7 in declination. The average of the discordances in declination is 5."58, and the square root of the mean of the squares is 8."1. cxxxn COMPARISON-STARS. If we include in this examination those stars hereafter cited, which were observed with Mars on the meridian, althoiigh not strictly comparison-stars, we find that all but one of these eighteen are also in the Catalogue of the British Association. The catalogue places of these thirty-one stars are here annexed. Comparison-Stars from British Association Catalogue. * N'.B.A.O Mag. Year. Mean place for beginning of year. -' IT.B.A. C. Mag. Year. Mean place for beginning of year. «. d. a. d. h. in. s. * t if h. m, s. o / // 1 1562 7 1850 4 56 36.56 +26 13 12.1 64 2789 6 1852 8 11 43.71 +24 29 4.1 a 1648 6J 1850 5 11 34.46 27 47 58.4 m 2818 7 1852 8 17 51.24 25 0 54.8 b 1681 2 1850 5 16 48.79 28 28 32.6 n 2833 4 1852 8 19 49.89 24 37 55.1 c 1707 7 1850 5 20 2.62 25 1 20.7 0 2850 6 1852 8 22 45.07 24 34 31.8 d 1754 7 1850 5 27 47.03 26 49 34.4 P 2864 7 1852 8 24 14.72 24 35 2.6 e 1778 6 1849 5 30 22.91 25 48 22.9 9 2937 •H 1852 8 34 42.94 21 59 52.6 12 1896 5j 1849 5 48 37.63 25 55 46.9 r 3017 7* 1852 8 45 27.01 20 31 24.1 / 1937 7 1850 5 54 56.05 25 26 36.0 109 3181 7i 1851 9 12 14.52 +1943 1.8 f 1981 6 1949 6 2 16.64 24 26 50.8 118 5839 6* 1851 17 11 13.11 —17 35 42.5 21 2058 7 1849 6 15 25 51 25 7 16.5 125 5946 7 1850 17 28 47.02 27 57 18.1 35 2194 3 1849 6 34 38.46 25 16 30.2 130 6063 6J 1850 17 47 14.76 28 2 13.6 A 2555 2 1852 7 36 15.34 28 22 45.1 140 6194 5i 1850 18 8 39.99 27 5 29.8 I 2578 7 1852 7 39 42.35 23 30 14.8 143 6214 7 1850 18 11 54.29 26 828.0 k 2613 65 1852 7 44 13.53 22 42 45.5 147 6261 7 1850 18 18 22.77 26 42 50.5 51 2639 6 1853 7 48 35.12 16 10 57.4 148 6301 7 1851 18 23 42.96 —19 4 24.2 I 2703 7 1852 7 57 49.33 +22 52 39.9 Comparing these thirty-one declinations with the values here determined, and assuming the latter to be correct, we find — The average discordance, d = 4". 06, The mean error, s =. ± 6". 15 ; or, excluding those stars whose places depend upon Lacaille, e = ± 3".50. Lacaille's positions have not been employed, inasmuch as, after careful examination, they seemed unlikely to add to the precision of the results. The following General Catalogue of Comparison-Stars presents the adopted mean places for the beginning of the year of observation, together with the annual precessions and the constants for reduction to apparent places. GENERAL CATALOGUE OF COMPARISON STARS. CXXX1V COMPAKISON-STARS. General Catalogue of Comparison-Stars. No. Mag. Year. «. Aim. Free. a. b. C. d. h. in. s. s. 1 7.8 1850 4 56 37 +3.706 9.4834 0.0303 1.7449 9.1286 a 8 1850 535 3.712 9.4379 0.0338 1.7456 9.0840 3 9 1850 5 10 29 3.712 9.3779 0.0365 1.74SB 9.0212 4 8.9 1850 5 17 48 3.725 9.3107 0.0406 1.7473 8.9593 5 9 1850 5 21 43 3.728 9.368) 0.0-119 1.7476 8.9178 6 8 1849 5 22 32 3.731 9.2600 0.0-126 1.7480 8.9106 7 9 1849 5 25 40 3.730 9.2219 0.0431 1.7478 8.8707 8 7 1849 5 29 33 3.733 9.1704 0.0444 1.7482 8.8203 9 9 1849 5 3-2 12 3.734 9.1311 0.0451 1.7482 8.7811 10 8* 1849 5 44 35 3.734 8.8752 0.0465 1.7482 8.5230 11 9 1849 5 46 15 3.736 8.8259 0.0472 1.7485 8.4746 12 5J 1849 5 48 38 3.721 S.7414 0.0456 1.7467 8.3821 13 1849 5 54 4 3.732 8.4604 0.0172 1.7480 8.1065 14 8.9 1849 5 54 28 3.734 8.4304 0.0475 1.7482 8.0776 15 8 1849 6 1 31 3.725 717.8671 0.0465 1.7472 717.5095 16 9 1849 6 2 22 3.724 718.0603 0.0464 1.7471 717.7023 17 8 1849 665 3.706 n8.4680 0.0439 1.7450 718.1008 18 91 1849 6 7 35 3.710 718.5642 0.0444 1.7455 718.1988 19 9 1849 6 9 26 3.711 n8.6592 0.0144 1.7456 718.2945 20 9 1849 6 11 32 3.716 n8.7470 0.0449 1.7462 718.3852 21 7 1849 6 15 26 3.697 •8.8711 0.0422 1.7440 718.4990 22 9 1849 6 16 47 3.710 718.9092 0.0437 1.7455 718 5446 23 9 1849 6 17 59 3.710 nS.9386 0.0430 1.7454 718.5719 24 9 1849 6 18 45 3.675 718.9528 0.0390 1.7413 718.5679 25 8J 1848 6 19 25 3.713 718.9724 0.0437 ] .7458 118. 6096 26 9 1849 6 21 2 3.700 719.0057 0.0417 1.7442 7i8.6355 27 9 1849 6 21 11 3.715 719.0104 0.0437 1.7460 718.6487 28 1 1849 6 21 36 3.707 719.0182 0.0428 1.7452 718.6525 29 1849 6 25 27 3.707 n9.0893 0.0420 1.7451 11 8. 7242 30 8.9 1849 6 25 44 3.692 719.0922 0.0401 1.7434 718.7187 31 9 1849 6 25 47 3.684 n9.0921 0.0391 1.7424 718.7138 32 9 1849 6 27 21 3.678 n9.1171 0.0380 1.7417 7i8.7356 33 9 1849 6 27 53 3.677 719.1251 0.0378 1.7416 718.7431 34 9 1849 6 28 48 3.689 719.1401 0.0391 1.7430 •8.7RM 35 3J 1849 6 34 38 3.696 719.2214 0.0387 1.7438 718.8517 36 9 1852 7 26 52 3.410 719.5838 9.9836 1.7089 719.0038 37 8.9 1852 7 29 28 3.413 719.5963 9.9819 1.7092 7i9.0208 38 1852 7 29 29 3.395 n9.5948 9.9804 1 .7070 718.9984 39 9.10 1852 7 30 38 3.400 719.6006 9.9800 1.7076 719.0105 40 8 1852 7 30 58 3.397 719.6019 9.9795 1.7072 719.0090 41 8 1852 7 32 44 3.417 719.6116 9.9799 1.7097 719.0432 42 1852 7 33 42 3.391 719.6138 9.9768 1.7064 719.0139 43 9 1852 7 33 49 3.419 7i9.6167 9.9793 1.7100 719.0524 44 1852 7 38 58 3.464 719.6432 9.9797 1.7156 H9.1305 45 8 1852 7 41 52 3.613 n9.6732 9.9954 1.7340 719.2852 46 1852 7 44 53 3.415 7i9.6624- 9.9700 1.7095 719.1020 47 1852 7 46 36 3.623 719.6936 9.9931 1.7351 719.3154 48 1852 7 46 57 3.619 719.6944 9.9923 1.7347 ji9.3140 49 8 1852 7 47 6 3.630 7i9.6966 9.9936 1.7360 719.3233 50 7.8 1852 7 47 15 3.603 719.6936 9.9899 1.7328 719.3030 51 6 1852 7 48 35 3.417 7.9.6768 9.9669 1.7097 B9.1219 52 9 1852 7 48 38 3.464 7,9.7018 9.9916 1.7353 7i9.3261 53 1852 7 50 53 3.588 7i9.7055 9.9849 1.7310 719.3076 54 9 1852 7 50 59 3.610 719.7089 9.9878 1.7336 719.3262 55 8 1852 7 52 38 3.605 719.7143 9.9856 1.7329 719.3289 56 9 1853 7 53 31 3.408 719.6941 9.9615 1.7086 09.1336 57 9 1852 7 55 3 3.619 7i9.72M 9.9856 1.7346 7i9.3511 58 8.9 1852 7 55 15 3.616 ii9.7255 9.9850 1.73-13 719.3501 59 9 1852 7 59 15 3.561 J19.7320 9.9738 1.7276 719.3211 60 9 1852 7 59 24 3.610 719.7393 9.9805 1.7335 719.3632 61 1852 8 5 27 3.401 7i9.7337 9.9487 1.7076 719.1759 62 9 185S 8 6 16 +3.598 n9.7609 9.9724 1.7321 719.3833 COMPARISON-STABS. cxxxv General Catalogue of Comparison-Stars. No. s. A.m. Prec. a'. V. d. d'. Weight. 1 +26 13 6.03 +5.48 1.8.5527 9.0815 0.73S5 t.9.9832 70 2 26 16 19.35 4.93 n8.6014 9.0366 0.6928 1.9.9865 88 3 26 5 48.82 4.30 1.8.6111 8.9745 0.6334 n9.9898 68 4 26 26 53.81 3.67 1.8.6921 8.9113 0.5649 n9.9926 73 5 26 27 46.61 3.34 nil. 7067 8.8698 0.5231 B9.9939 68 6 26 34 5.9 3.26 •8.7999 8.8621 0.5138 09.9942 3 7 26 27 2.6 2.99 t.8.7153 . 8.8227 0.4762 1.9.9951 3 8 26 31 27.44 2.06 n8.73.-,:i ' 8.7720 0.4244 n9.9962 118 9 26 31 51.78 2.43 n8.7414 8.7328 0.3850 n9.9%8 70 10 26 23 1.41 1.35 n8.7371 8. 4752 0.1297 1.9.9990 31 11 26 26 46.55 1.20 1.8.7485 8.4266 0.0801 1.9.9992 78 12 2.', 55 45.84 0.99 t.8.6672 8.3360 9.9975 n9.9995 76 13 26 16 30.31 0.51 n8.7190 8.0522 9.7158 H9.9998 83 14 26 21 0.09 +0.48 1.8.7392 8.0300 9.6850 1.9.9999 76 15 26 2 16.10 —0.13 1.8.6905 117.4630 1.9.1229 nO.OOOO 64 16 26 0 41.88 0.21 ..8.6860 07.6559 t.9.3162 nO.OOOO 24 17 2.'. •->•> 23.13 0.53 n8 5594 n8.0559 .19.7262 ti9.9998 26 18 25 32 21.74 0.66 1.8.5948 nS.1542 1.9.8218 n9.9998 24 19 25 35 2.20 0.82 t.8.6027 1.8.2497 1.9.9166 n9.9996 12 20 25 45 46.25 1.03 n8.G3fil nS.3397 nO.0038 1.9.9994 18 31 25 7 20.05 1.39 j.8.4869 1.8.4559 nO.1302 1.9.9990 58 22 M.84 1.47 nS.5953 1.8.4997 nO.1666 n9.9988 14 23 35 37 23.6 1.57 1.8.5644 •8.9079 nO.1%5 n9.9987 3 21 34 20 3I.ll 1.64 ..8.1885 1.8.5274 nO.2146 n9.9986 3 2.-. 25 42 33.04 1.70 ..8.6153 n8.5644 nO. 2291 t.9. 9984 25 26 2:, 11 26.91 1.84 1.8.5063 nS.5919 nO.2644 n9.9982 13 27 2.-, Hi 40.55 1.85 1.8.1, n8.6032 1.0.2671 n9.9981 11 28 26 31 16.35 1.89 1.8.5719 1.8.6079 nO.2759 H9.9981 13 29 26 33 51.6 2.22 t.8.5714 1.8.6795 nO.3469 n9.9973 5 30 35 1 57.37 2.25 «8.43fiO 1.8.6759 1.0.3516 «9.9973 9 31 24 44 44.57 2.25 nS.3384 t.8.6720 no.352.-, B9.9972 6 32 24 32 49.08 2.39 n8.2493 1.8.6945 1.0.3782 .i9.9%9 8 a 24 31 4.75 2.43 1.8.2327 nS.7021 nO.3863 1.9.9968 8 34 24 57 24.40 2.51 n8.4010 H8.7228 1.0.3998 n9.9966 7 35 25 16 29.76 3.02 1.8.4725 n8.8080 nO.4799 n9.9950 320 36 15 15 1.4 7.42 9.2413 ..8.9882 nO.8705 1.9.9680 3 37 15 24 42.2 7.«3 9.2370 1.9.0049 nO.8826 .19.9660 6 38 14 40 6.9 7.63 9.2687 n8.9840 nO.S827 1.9.9660 3 39 14 53 36.6 7.73 9.2605 n8.9957 nO.8880 .19.9651 3 40 14 47 39.1 7.75 9.2650 n8.9944 1.0.8895 n9.9648 3 41 15 40 22.0 7.90 9.2292 ..9.0267 nO.8974 n9.9634 6 42 14 33 0.80 7.98 9.2777 ..8.9998 1.0.9019 1.9.9626 7 43 15 49 51 . 1 7.98 9.2336 n9.0356 1.0.9022 .19.9626 3 44 15 53 0.6 8.39 9.1374 ..9.1090 nO.9240 1.9.9582 1 45 24 9 12.70 8.62 8.4238 n9.2454 nO.9357 n9.9556 4 48 15 58 40.4 8.86 9.2311 ..9.0850 nO.9475 n9. 9528 1 47 •Jl II 50.72 9.00 8.3001 1.9.2736 1.0.9540 n9.9512 16 48 24 36 48.54 9.02 8.1528 1.9.3726 nO.9552 n9.9509 16 49 25 3 2.69 9.04 8.1795 119.2804 nO.9559 1.9.9508 58 50 24 0 37.9 9.05 8.5219 119.2637 nO.9565 n9.9506 3 51 16 10 52.60 9.15 9.2273 ..9.1043 nO.9615 1.9.9493 53 52 34 54 11.22 9.16 8.2780 n9.3838 nO.9616 119.9493 31 53 23 34 50.1 9.33 8.6395 n9.2697 nO.9699 n9.9470 1 54 24 28 27.13 9.34 8.4518 n9.2853 nO.9702 n9.9470 18 55 24 18 58.67 9.47 8.5108 t.9.2886 nO.9762 119.9453 19 56 15 58 1.35 9.53 9.2435 1.9.1165 nO.9793 1.9.9444 6 57 25 0 30.89 9.65 8.3565 .19.3084 nO.9845 n9.9428 78 58 34 55 10.16 9.67 8.3871 ..9.3077 nO.9853 H9.9426 67 59 22 50 45.4 9.97 8.7996 »9.2856 nO.9987 .19.9384 6 60 24 52 41.83 9.98 8.4594 1.9.3810 nO.9992 1.9.9382 18 61 16 4 20.7 10.44 9,2567 n9.1586 ul.0186 1.9.9314 1 62 +24 47 0.20 —10.50 8.5661 n9.3413 nl.0212 1.9.9305 33 CX XX VI COMPARISON-STAGS. General Catalogue of Comparison- Stars — Continued. No. Mag. Year. a. Ann. Free. a. &. C. d. A. 7N. «. ti 03 8 1852 8 10 14 +3.534 7.9.7636 9.0384 1.7234 7.9.3362 64 6.7 1852 8 11 44 3.583 7i9.7762 9.9648 1.7303 719.3937 65 9 1852 8 11 51 3.392 719.7527 9.9408 1.7065 1^.1912 66 1852 8 13 10 3.581 719.7804 9.9631 1.7301 7.9.3980 67 8 1852 8 14 59 3.375 7.9.7602 9.9354 1.7043 7.9.1800 .68 8 1852 8 16 8 3.575 719.7886 9.9591 1.7294 7.9.4050 69 8.9 1852 8 16 36 3.565 719.7886 9.9572 1.7282 r.9.3983 70 7 1852 8 19 29 3.507 719.7889 9.9458 1.7210 719.3556 71 1853 8 19 47 3.564 719.7978 9.9535 1.7280 7.9.4099 72 1852 8 19 50 3.567 719.7986 9.9540 1.7284 7.9.4134 73 1852 8 20 55 3.560 719.8006 9.9517 1.7276 7.9.4115 74 1852 8 21 44 3.498 719.7941 9.9419 1.7199 7.9.3552 75 7.8 1859 8 24 25 3.377 M9.7870 9.9241 1.7046 719.2212 76 8.9 1852 8 26 59 3.381 719.7943 9.9212 1.7052 n9.2378 77 1852 8 27 32 3.547 719.8175 9.9422 1.7260 719.4263 78 1852 8 28 3 3.538 719.8174 9.9401 1.7248 7.9.4194 79 9 1852 8 28 15 3.541 »i9.8186 9.9404 1.7253 7.9.4238 80 1852 8 30 12 3.530 719.8224 9.9364 1.7239 719.4214 81 8 1852 8 31 11 3.469 719.8161 9.9264 1.7163 719.3625 82 1852 8 31 41 3.525 719.8255 9.9338 1.7233 7)9.4222 83 9 1852 8 32 23 3.429 719.8141 9.9196 1.7113 719.3216 84 9 1852 8 33 36 3.434 719.8152 9.9200 1.7119 719.3280 85 8.9 1852 8 35 7 3.519 T19.8336 9.9286 1.7226 7.9.4297 86 9 1852 8 39 25 3.417 719.8300 9.9085 1.7098 719.3336 87 9 1852 8 40 18 3.493 719.8439 9.9189 1.7192 7.9.4312 88 9 1852 8 44 15 3.491 719.8520 9.9119 1.7190 7i9..i:i60 89 8.9 1852 8 45 28 3.495 719.8556 9.9109 1.7195 7.9.4450 90 8 1852 8 45 58 3.484 719.8552 9.9085 1.7182 719.4358 91 8 1852 8 47 26 3.479 719.8579 9.9057 1.7176 7.9.4362 92 9 1852 8 47 33 3.477 719.8579 9.9051 1.7173 1.9.4342 93 8 1852 8 48 54 3.470 719.8600 9 9030 1.7164 n9.4316 94 7.8 1852 8 50 26 3.464 719.8626 9.8989 1.7157 7.9.4312 95 8 1852 8 52 13 3.467 719.8672 9.8967 1.7161 7.9.4415 96 9 1852 8 53 47 3.456 719.8689 9.8925 1.7146 7.9.4343 97 7.8 1852 8 58 16 3.439 719.8763 9.8829 1.7126 7.9.4328 98 9 1852 8 59 27 3.445 719.8797 9.8818 1.7133 7.9.4436 99 8.9 1852 9 3 20 3.429 719.8854 9.8728 1.7112 7.9.4389 100 8.9 1852 9 3 20 3.430 7i9.8856 9.8730 1.7114 7.9.4405 101 8.9 1852 9 4 16 3.433 719.8881 9.8719 1.7118 1.9.4480 102 9 1851 9 4 23 3.421 719.8864 9.8698 1.7102 119.4338 103 9 1851 9 7 22 3.402 719.8896 9.8617 1.7078 7.9.4208 104 1851 9 7 37 3.417 719.8924 9.8635 1.7097 7.9.4406 105 1851 9 7 39 3.413 719.8918 9.8628 1.7092 7.9.4355 106 9 1851 9 8 11- 3.401 7.9.8911 9.8601 1.7077 7.9.4225 107 1851 9 8 11 3.408 7^.8922 9.8612 1.7086 719.4317 108 9 1851 9 10 18 3.401 7.9.8953 9.8562 1.7077 719.4303 109 7 1861 9 12 14 3.392 7.9.8977 9.8513 1.7066 n9.4258 110 1850 16 40 55 3.699 n9.5774 TlO.0-.H7 1.7441 9.2265 111 1850 16 42 56 3.706 7.9.5673 7.0.0238 1.7449 9.2192 112 1850 16 49 12 3.717 7.9.5326 7.0.0286 1.7463 9.1877 113 1850 16 50 5 3.720 7.9.5275 7.0.0294 1.7466 9.1837 114 1850 16 51 59 3.724 7.9.5161 TlO.0308 1.7471 9.1735 115 1850 16 54 49 3.725 7.9.4989 7.0.0322 1.7473 9.1559 116 1850 16 59 44 3.735 7.9.4658 7.0.0357 1.7484 9.1257 117 1850 17 7 8 3.746 r.9.4108 7.0.0400 1.7497 9.0735 118 6i 1851 17 11 13 3.486 7.9.3456 7.0.0109 1.7184 8.8259 119 1850 17 12 50 3.763 7.9.3638 7.0.0442 1.7517 9.0333 120 1850 17 13 22 3.756 7.9.3577 7.0.0431 1.7508 9.0224 121 1850 17 13 51 3.764 719.3544 nO. 0445 1.7517 9.0237 123 1851 17 13 55 3.486 7.9.3211 7.0.0118 1.7184 8.8006 123 1851 7 21 18 3.492 719.2165 7.0.0148 1.7192 8.7291 124 1851 17 25 18 3.494 7.9.1996 7.0.0161 1.7194 8.6832 125 7 1850 17 28 45 +3.775 7.9.1869 TiO.0498 1.7530 8.8578 COMPARISON-STARS. General Catalogue of Comparison- Stars — Continued. CXXXVll No. 3. Ann. Free. a'. V. cf. d'. Weight. +21 .17 :i.0!i —10.79 8.1)417 n9.3036 til. 0332 09.9258 4 M 24 29 3.89 10.90 8.6788 7i9.:i ni.osn 719.9239 413 r>.-, 15 a.') 48.5 10.91 9.2719 7i9.n i-> nl.0380 719.9238 3 • 24 2!) 2-2.50 11.01 8.G849 •9.3570 ill 0417 7i9.9222 20 n 1.1 44 33.5 11.14 9.3012 n9.1645 til. 0469 719.9199 3 68 24 25 5.32 11.22 8.7207 R9.3643 nl.0502 til). 9184 29 69 21 1 31.99 11.20 8.7710 7i9.x.uo •1.0315 1.11.9178 19 70 21 38 15.92 11.47 9.0037 nS.3 nl.0594 ti9.9140 4 71 24 9 10.5 11.1!) 8.7813 n9.3700 nl.0603 719.9136 20 -•'. 24 19 43.1 11.49 8.7017 n9.3730 •1.0804 119.9136 15 73 24 5 30.9 11.. V, 8.7973 n9.3719 til. 0633 n9.9122 10 71 21 20 54.3 11.63 t.tsu 7i9..'. nl.0655 n9.!)110 1 7;> 15 46 20.15 11.83 9.2966 ill). 2046 nl.0726 n9.9074 6 76 16 14 7.8 12.00 9.2888 119.2204 nl.0792 ,19.9038 3 77 23 58 5.5 12.04 8.8549 719.3871 nl.0805 7l9 9030 15 78 23 34 17.2 12.07 8.8944 n9.3815 nl.0818 n9.9023 15 79. 23 45 37.97 12.09 8.8789 719.3853 nl.0823 n9.9020 23 80 23 24 21.45 13.99 8.9210 «9.3842 III. 0874 nfl.8991 20 81 20 36 12.24 12.29 9.1076 •t.'ane 111. 0896 n9.8977 8 23 16 11.8 11.83 8.9397 n9..v nl .0909 n9.8970 15 83 18 46 14.60 1 1 n 9.1977 719.2979 til. 0926 «9.- 21 84 19 0 43.0 12 39 9.1H78 n9.3037 til. 0930 «9.^' 3 23 14 11.64 19.11 8.9596 tt.WK nl.0990 •9.8919 26 86 18 35 42.7 19.61 9.2214 .19.31111 til. 1090 n9.8852 3 87 22 41 4-;. D7 12.91 9.0185 n9.3960 ill. 1110 «9.8638 13 22 33 33.74 13.17 9.0472 T19.4014 nl. 1197 n9>-;: i 23 89 22 51 37.98 13 26 9.0347 ti9.4ll!l.-| nl.1224 7i9.b7:,l 52 90 22 22 44.90 13.29 9.0648 nl) 4018 til. 1234 «9.8745 28 91 U 15 16.45 13.38 9.0776 ri9.4026 nl.1266 719.8720 95 92 47.07 13.39 9.0838 «9.40()9 til. 1268 .19.8718 28 !i:i 21 54 57.81 13.48 9.1012 n9.i994 nl. 1297 n9.8695 63 13.14 13.61 9.115T •9.3998 nl. 1328 .19.8669 69 99 S3 2 29.25 13.69 9.1073 n9.4086 •1.1X3 7,9.8637 23 96 21 34 8 54 13.79 B.1357 H9.402S nl.1396 119.8610 28 97 21 ti 11.08 9.1711 «9.<026 nl.1484 ti9.8527 36 98 21 29 21.0.-. 14.15 ^ 9.1588 n9.4t23 til. 1507 719.8505 28 99 •21.40 14.39 9.1934 n9.4092 ti 1.1580 •9.8431 16 100 21 1 46.79 14.39 9.1904 >i9.4I06 tll.-l n9.M.'H 32 1(11 21 16 51 .23 14.41 9.1834 ill). 4 173 nl.1597 7i9.bll2 79 102 20 37 .Y;. '.« 14.45 9.2092 T19.4045 nl.1599 111). 84 10 20 103 19 51 45. 7 14.03 9.3448 n9.3942 •Lisa n9.8351 10 1111 20 41 14,84 9.2164 .19.4116 nl . 1657 ti9.8346 I.'! 10.) 20 27 59.92 14.66 9.2243 119.4072 nl.1658 n9.8345 18 tea l!i .v; 26.2 14.68 9.2467 i>9.3958 til. 1667 119.8334 10 107 20 15 14.68 9.S332 n9.4040 •1.1667 719.8334 95 m 20 2 .TJ.72 14.81 9.2466 n9.4032 nl.1704 ti9.8S90 25 Il)!l +19 43 5 50 14.92 9.2624 .19.3996 •1,1737 ti9.- 41 110 —26 28 27.92 6.78 118.4925 9.1784 •o.eei is 9.9736 36 111 26 3U . 6.62 . tl8.5530 9.1704 nO.8207 B.97SO 25 119 : -11.74 6.10 tl8.6388 9.1381 710.7C52 9.9789 35 113 26 56 6.02 H8.6564 9.1338 •O.i 9.9795 35 1M 27 1 17.70 5.86 tl8.6803 9.1233 •0.71 9.9806 26 11.-, 26 59 41.4 5.04 ti8.6883 9.1068 n0.7.-,ll 35 no 27 11 47.28 5 21 •8.' 9.0748 tiO.7171 9.9848 25 117 27 23 8.74 4.58 ti8.7956 9.0219 nO.6614 35 lie 17 35 42.76 4.24 9.07-28 8.8051 nOj: 89 119 27 50 52. »S 4.10 718.8668 8.H79S nO.lil !C 30 120 27 31 21.64 4.05 718.8310 8.1)703 •o.aoTi 9.9910 121 27 49 S-.65 4.01 n8.f! 8.9703 nO.6033 9.9911 10 tag 17 33 8.88 4.01 9.0728 nO.6027 9.9919 M op 17 41 12.42 3.37 9.0567 8.7081 rtjsm 12 124 17 43 32.68 3.02 9.0506 •0.4807 27 125 —27 56 57.38 -».7B 118.9086 ii0.4.-)53 9.9960 28 cxxxvni COMPARISON-STARS. General Catalogue of Comparison- Stars — Continued. No. Mag. Year. a. Ann. Tree. a. b. c. d. ft. m. s. s. 136 1851 17 32 1 +3.503 n9.1074 nO.0185 1.7205 8.5974 127 n 1851 17 38 44 3.505 718.9888 7iO 0900 1.7208 8.4798 128 1850 17 43 52 3.781 718.9013 nO.0530 1.7537 8.5731 129 1851 17 46 23 3.512 718.7961 TiO.0217 1.7217 8.2920 130 6J 1850 17 47 14 3.783 718.7999 TiO.0535 1.7539 8.4720 131 1850 17 52 24 3.778 718.5741 nO.0533 1.7534 8.2438 132 1850 17 53 28 3.777 7)8.5082 7.0.0532 1.7532 8.1773 133 1850 17 55 54 3.778 718.3060 TiO.0533 1.7533 7.9752 134 law 17 59 6 3.773 n7.6925 nO. 05-27 1.7527 7.3592 133 1850 17 59 50 3.776 716.9059 710.0531 1.7531 6.5739 136 1850 18 4 7 3.786 8.2977 nO.0433 1.7443 717,9266 137 1850 18 4 48 3.683 8.3702 nO.0521 1.7523 718.0351 138 1850 18 6 40 3.717 8.5102 nO.0452 1.7462 •8.1481 139 1850 18 7 1 3.766 8.5847 nO.0526 1.7520 7i8.2475 140 5 1850 18 8 40 3,755 8.6280 nO.0502 1.7507 718.2864 141 1851 18 9 5 3.528 8.6259 710.0236 1.7236 718.1351 142 1850 18 9 30 3.723 8.6637 TiO.0459 1.7470 718.3053 143 7 1850 18 11 53 3.727 8.7620 nO. 0463 1.7475 718.4060 144 1S51 18 12 37 3.528 8.7647 710.0235 1.7237 718.2746 145 8J 1850 18 13 1 3.737 8.8092 710.0474 1.7486 718.4514 146 1850 18 15 19 3.739 8.8731 TiO.0475 1.7488 »8.5236 147 7 1850 18 18 23 3.743 8.9528 TiO.0476 1.7493 718.6056 148 7 1851 18 23 43 +3.532 9.0386 TiO.0222 1.7241 718.5529 COMPARISON-STARS. General Catalogue of Comparison- Stars — Continued. CXXX1X No. s. Ann. Prec. a'. I'. tf. d'. Weight. 0 t II // 1-26 — 17 59 52.10 —2.44 9.0254 8.5756 TiO.3879 9.9968 20 127 18 2 43.45 1.86 9.0177 8.4579 nO.2691 9.9981 59 128 28 0 54.48 1.41 718.9314 8.5190 710.1494 9.9989 25 159 18 15 28.10 1.19 8.9972 8.2696 nO 0759 9.9992 31 130 28 2 5.41 1.12 .18.9357 8.4178 TiO.0479 9.9993 21 131 27 51 68.2 0.66 718.9218 8.1902 719.82J8 9.9998 20 132 27 49 10.57 0.57 118.9176 8.1239 K9.7571 9.9998 26 133 27 50 9.42 0.36 n8.9198 7.9218 719.5548 9.9999 25 134 27 39 25.44 0.09 718.9021 7.3065 718.94-31 0.0000 25 135 27 45 1.54 —0.01 n8.9116 6.5208 718.1551 0.0000 25 136 25 iO 53.16 +0.37 7)8.5147 717.8832 9.5f.66 9.C999 36 137 27 32 8.57 0.59 718.8888 717.9829 9.6202 9.9999 22 138 25 45 5.50 0.59 n8.6378 718.1027 9.7671 9.9998 •25 139 27 27 19.48 0.68 «8.8792 718.1956 9.8341 9.9998 20 140 27 5 26.28 0.76 718.8373 7i8.2360 9.8798 9.9997 63 141 18 50 48.62 0.80 8.9439 718.1113 9.9042 9.9997 X 142 25 59 9.6 0.83 718.6783 7i8.2590 9.9197 9.9996 15 143 26 8 42.83 .04 718.7033 718.3593 0.0174 9.9994 23 144 18 55 16.28 .10 8.9381 718.2514 0.0428 9.9993 29 145 26 28 48.81 .14 718.7540 718.4033 0.0563 9.9993 36 146 26 33 53.50 .34 718.7641 718.4752 0.1269 9.9990 31 147 26 43 0.54 .61 718.7819 n8.5566 0.2060 9.9986 42 148 —19 4 23.99 +2.07 8.9299 »8.5284 0.3164 9.9977 57 cxl COMPARISON-STARS. Lastly, there is another class of stars to be examined ; namely, those observed in connection with Mars upon the meridian at different places, and although not near enough to the planet to be treated as comparison stars, yet forming in fact the basis upon which the respective series of meridian observations must rest. The places of these stars have been reduced from the several authorities, together with those which were required for our General Catalogue, and the htars are referred to in the preceding special tables by index-letters instead of numbers. The data employed for the determination of their adopted places are given below, and followed by the resultant list; the method of reduction and form of presentation being the same with that for the 148 stars of the catalogue proper. To this class belong also ft Tauri and ,3 Geminorum, which being fundamental stars have been so thoroughly and frequently observed at Greenwich during the period of the Mars observations, that the places taken direct from the Greenwich Catalogue for 1850 seem more trustworthy than those derived from any combination of observations made at different epochs. Places of Stars not used for comparison, but observed with the Gape Mural Circle, in connection loitli Mars I. Name. Date. Observed. Epoch. Reduced ti epoch in O. Mean O ut i-pucli. a. d. A. m. s. « t ii n 0 / // B.A.C. 1648 .... 1849, Dec. 30 5 11 35 48 31 +27 47 51.68 1850.0 +6.65 +27 47 58.33 1850 Jan. 3 35.25 54.83 6.50 48 1.33 4 53.92 +6.45 48 0.37 27 48 0.01 1849.— Dec. 24 5 20 3.51 25 1 16.18 1850.0 +7.40 +25 1 23.58 36 15.86 7.35 23.31 29 17.96 7.27 25.23 1850.— Jan. 10 3.52 19.46 6.95 26.41 11 18.47 6.93 25.40 12 3.66 18.44 6.91 25.35 14 18.18 6.86 S.-..04 15 18.12 6.83 94,95 16 18 00 6.80 24.80 17 19.07 +6.77 25 84 25 1 24.98 B.A.O. 1754 1850.— Jan. 7 5 27 47.73 26 49 23.90 1850.0 +6.95 26 49 29.85 8 47.85 23.07 6.92 29.99 9 47.78 24.36 +6 88 31.24 26 49 30.36 125 Tauri *. . . . 1849.— Dec. 18 5 30 27.26 25 48 20.39 1849.0 +5.17 25 48 85.56 20 27.25 19.22 5.12 24.34 21 20.28 +5.09 25.37 25 48 L>:,.( I'.l 1849.— Nov. 25 +24 26 41.98 1849.0 +8.60 24 26 50.58 26 6 2 20.69 27 20.40 43.92 +8.60 52.52 1850.— Jan. 7 20.21 21 26 51.55 These determinations are given by Mr. Maclear in the Memoirs of the Royal Astronomical ety of London, volume XX, pp. 104, 5. They have been used with the regular micrometric comparison-stars, determined during the same period at the Cape, for obtaining the constant quantity which is to be subtracted from all the circle-measurements, both of planets and stars, Cape, in order to reduce the declinations to our adopted standard COMPARISON-STARS. cxli Declinations of Stars olserved with the Cape Mural Circle, in connection with Mars II. Name. Date. Observed t> . Red to 1852.0. Mean it 1852.0. Name. Date. O'l-i-rvil O. !!••(!. In Mean 8 0 , // n * / '/ ° / // B ° / 11 {3 Geminoi. 1851.— Dec.22 +28 22 -11.05 +4.08 S -i.'i.ut l.:il. i . 1833.— Jan Hi +22 46 33.34 +4.21 +22 46 37..-,.-. 26 4V.89 4.07 is. 98 29 48.44 4.83 46.49 30 D" Cancri Jan. 12 +24 34 32.32 +4.12 +24 34 36.44 30 42.08 4.04 48.10 13 4.13 34.68 .Ian. 1 42.47 4.02 14 32.70 4.13 36.83 2 41.52 •1.00 45. M 15 38.35 4.14 36.49 3 48,70 3.98 48.68 16 31.93 4.14 36.07 5 49.31 3.94 46.43 19 33.14 4.12 37 H 9 3.84 47.86 20 33.07 4.10 37.17 10 43.98 3.80 46.85 21 31.23 4.09 35.32 12 43.84 3.7:( 47.57 22 33.45 4.07 37.52 13 «t.oe 3.70 45.78 23 32.90 4.06 36.96 14 43.70 3.66 Feb. 5 32.91 3.65 36.56 IS 44.11 3.63 47.74 7 32.83 +3.57 36.40 19 43.43 3.46 47 89 +24 ;)4 36 48 20 43.70 3.41 47.11 28 r* Cancri Feb. 3 +24 37 53.16 +3.69 +24 3; . 21 48,65 3.36 46.21 4 53.31 3.66 56.97 •w •I'-1. !.", 3.30 45.75 5 53.36 3.62 56.98 2.'i 43.80 s.as 47.o:, 6 53.64 3.58 24 48.46 3.20 7 53.54 +3.53 57.07 27 44.35 3.03 47.38 .,., 43.0.-, 2.91 46.96 +24 37 57.02 Feb. 2 .ll.;:i 2.66 47.00 24 tt' Cancri Jan. 2 I +25 0 57.62 +3.97 +25 1 1.59 3 44.16 2.60 46.76 26 57.44 3.91 1.35 4 I.M 45. TJ Feb.18 56.49 2.84 5 41.11 2.47 46.61 20 1 0.32 +2.71 6 43.45 2.40 45.85 +25 1 1.47 7 43.i;r, 2.34 45.99 10 45.23 2.12 47.33 B.A.O. 2703 Jan. 27 +22 52 37.12 +3.79 +22 52 40.91 11 45.19 2.05 47.24 29 36.70 3.74 40.44 12 44.91 1.98 46.89 Feb. 2 37.87 3.62 41.49 13 43.63 1.91 45.54 9 37.48 3.50 40.98 14 43.67 1.84 45.51 2.-. 38.59 2.61 41.20 1C, 45.12 1.70 46.82 28 38.59 + 2.46 41.05 17 44.61 1.63 46.24 +22 52*41.01 18 44.21 1.56 45.77 Y Cancri Jan. 2 +21 59 46.77 +3.64 +21 59 50.41 19 45.39 1.49 46.88 3 47.23 3.68 50.91 35 45.63 1.04 46.67 5 47.51 3.76 51.27 Feb. 28 45.99 +0.81 46.80 9 47.66 3.92 51.58 +28 22 4(i.f>3 10 46.08 3.95 50.03 B.A.O. 3017 Jan. 5 +20 31 21.59 +3.57 +20 31 25.16 12 13 47.08 45.72 3.98 3.99 51.08 49.71 32 v4 C ncri Jan. 12 +24 35 1.114 +4.14 +24 35 5.78 14 48.04 4.00 52.04 13 34 59 67 4.14 3.81 15 47.58 +4.01 l 51.59 14 35 1 39 4.15 5.54 +21 59 50.% 15 1.94 4.15 5.19 Ifi 0.66 4.14 4.80 82 Geminor. Feb.21 +23 30 8.09 +2.47 +23 30 10.56 19 1.90 4.13 6.03 K 9.50 2.40 20 1.87 4.12 5.99 84 10. H 2.35 21 0.04 4.10 4.14 25 2.29 11.61 22 2.66 4.09 6.75 38 8.71 +2.11 10.82 23 1.71 +4.08 5.79 +23 30 11.00 +24 35 5.38 84 Geminor. Feb.10 L22 42 38.06 +3.20 11.26 cxlii COMPARISON-STAKS. Stars observed ivith Mars on the Meridian. Lalandc 9944,5 Piazzi V, 41 Taylor 1912 Greenwich 303 (2.2) (6.7) (4.4) (3.5) [46] a k. m. s. 5 11 31. 18 34.54 34.50 34.43 1850.0. 0 / // + 27 48 1.9 0.1 57.7 58.7 Greenwich 571 (153,98) [490] n h. m, s. 7 36 15.31 1802.0. o / // + 28 22 45.43 7 36 15 + 28 22 45.43 Lalande 15146 (1.1) Piazzi VII, 207 (6.7) Bessel 339 (1.1) Taylor 3222 (8.6) Twelve-Year 698 (3.7) Greenwich 573 (8.7) [99] i h. m. s. 7 39 42.27 42.08 42.24 42.50 42.21 42.38 1852.0. • / // + 23 30 8.6 7.8 9.4 10.9 8.6 9.5 5 11 34 -f 27 47 58.78 Greenwich 374 (97.78) [390] It. m. s. 5 16 18.82 1850.0. 0 / // + 28 28 30.77 5 16 19 + 28 28 30.77 7 39 42 + 23 30 9.38 Lalande 10231-3 (3.3) 1'iazzi V, 98 (15.16) Taylor 1988 (6.5) Bessel 405 (1.1) Greenwich 381 (1.1) [42] A. 771. S. 5 20 2.39 2.59 2.47 2.57 2.54 1850.0. 0 / // + 25 1 17 4 22.8 24.1 24.8 22.9 Lalande 15312-4 (3.3) Piazzi VI', 232 (4.4) Be^cl 339 (1.1) Taylor 3372 (3.4) Greenwich 578 (4.4) [30] Jc h. in. s, 7 44 13.31 13.42 13.27 13.52 13.24 18S2.0. + 22 42 34.0 38.5 35.6 (42.5) 37.0 5 20 3 + 25 1 23.03 7 44 13 + 22 42 36.87 Lalande 10510 Bessel 405 1'iazzi V, 145 Taylor 20-15 Greenwich 395 (1.1) (1.1) (6.6) (6.5) (2.2) [35] d h. m. s. 5 27 47.04 46.85 46.69 46.86 46.91 1850.0. 0 f II + 26 49 31.8 34.6 29.6 29.1 30.7 Lalande 15795 (1.1) Piazzi VII, 299 (9.9) Bess.-l 339 (1.1) Taylor 3402 (4.4) Greenwich 593 (6.5) [50] A. m. a. 7 57 50.51 50.44 49.92 49.59 49.85 1852.0. + 22 52 39.4 40.2 39.7 38.7 39.6 5 27 47 + 26 49 30.18 7 57 50 + 22 52 39.48 Lalande 10605 (1.1) Piazzi V,165 (7.8) Taylor 2071 (5.5) Bessel 405 (1.1) Twelve-Tear 478 (4.7) Kiimker 1499 (2.2) Greenwich 402 (7.3) [83] A. m. s. 5 30 22.42 22.29 22.79 22.89 22.94 22.61 22.84 1849.0. 0 / // + 25 48 27.0 25.2 21.9 27.3 23.8 23.8 24.6 Lalande 16517-9 (3.3) Piazzi VIII, 65 pr. (6.7) Bessel 341,344 (2.2) Struve 994 (6.6) Taylor 3575 (6.7) RUmker 2516 (2.2) Greenwich 613 pr. (4.4) [123] m h. m. s, 8 17 51.24 51.49 51.31 51.36 51.33 51.15 1852.0. 0 / II + 25 1 6.0 1.8 59.6 0.7 0 59.5 1 2.5 0 59.6 5 30 23 + 25 48 23.90 8 17 51 + 25 1 0.54 Lalande 11441 Piazzi V, 306 Rilmkcr 1685 Taylor 2266 Greenwich 440 (1.1) (5.6) (16.10) (4.5) (2.2) [62] J k. m. i. 5 54 55.35 55.45 55.48 55.89 M.74 1850.0. « / // + 25 26 40.4 39.0 42.3 37.6 37.7 Lalande 16597-9 (3.3) Piazzi VIII, 76 (15.14) Taylor 3594 (9.5) Greenwich 617 (4.4) [52] n h. m. s. 8 19 49.53 49.73 50.09 49.82 1852.0. t> i ii + 24 37 58.0 56.8 57.9 55.5 8 19 50 + 24 37 56.69 5 54 55 + 25 26 40.06 Lalande 16685-7 (2.2) Piazza VIII, 84 (24.22) Bessel 344 (1.1) Taylor 3617 (1.4) KUmkcr 2545 (1.1) Greenwich 619 (3.2) [52] A. m. s. 8 22 45.41 45.25 44.90 49.MI 44.97 1852.0. o / // + 24 34 35.8 36.4 34.9 34.0 36.0 34.5 Piazzi V, 350 (9.9) Taylor 2335 (10.9) Bessel 348 (1.1) UUmkerl744 (1.1) Greenwich 453 (4.3) [54] 9 A. m. t. 6 2 16.45 16.51 16.67 16.15 18.B7 1849.0. • / // + 24 26 53.3 52.1 49.6 (59.2) 51.7 6 3 Hi + 24 26 52.06 . 8 22 45 + 24 31 35.35 COMPAKISOK-STAKS. Stars observed with Mars on the Meridian — Continued. cxliii IQISg.O. 1852. 0. P A. m. «. o / / ' A. m. s. 0 / talanrtc 16763 (1 1) 8 24 15.21 + 24 35 6.8 Lalande 17514,5 (2 2) 8 45 26.96 + 20 31 21.5 I'ia//.i VIII, 89 (:> 6) 14.99 3 1 Pinzzi VIII, 195 (6 6) 27.36 21.3 r., ,-i :i44 (1 1) 14.94 4 7 Taylor 3861 (3.4) 27.10 23.1 Taylor :«;:!.-, (3 •1) 14.85 4 2 Greenwich 623 (6 .8) 14 71 4 3 [62] 8 24 15 + 24 35 4 •M [20] 8 45 27 + 20 31 22.55 1852.0. 1852 0. ...:I6458 3 5 42.76 +0 31.51 0.03 6 14.30 11 11 26 N. S. 5 36 34. 6li 8 46 42.92 26.36.177 3 5 42.78 — 0 5.48 0.00 5 37.30 9 9 27 N. S. 5 15 38.37 8 21 51. 1.1 27.:! 3 5 12.82 —0 38.99 0.04 5 3.79 11 9 28 N. S. 5 40 9.22 8 42 25.08 28.362'.:) 3 5 42.86 -1 11.6.1 0.07 4 31.14 11 12 29 N. S. 5 24 30.34 8 22 59.85 29<94H9 3 5 42.90 -1 3M.03 0.10 4 3.77 11 11 31 N. S. 5 35 13.23 8 25 42.17 +31.:!. 3 +26 5 4-i.!M •j as.ee 0.16 +26 3 13.92 13 13 cxlviii OBSERVATIONS. B.— OBSERVATIONS OF MARS I, WITH THE WASHINGTON EQUATORIAL. • The following corrections and changes have been made in the series of Washington observa- tions as given in this volume : Page 351, November 2, Nos. 4, 5. This comparison is excluded. 352, < ' 4, No. 38, for Mars N. F. read Mars N. 353, Remarks. There is no reference to indicate the comparison alluded to. 359, November 24, No. 29, Mean of wires, for 4A.55m.29s.OO read 4A.56m.29s.OO. 359, Eemarks. Nos. 15 and 19 are included in the mean of the declinations. 361, " 26, No. 74, for 1.795 read 1.792. 363, December 6, " 17, " 4A.10m.38». 10 read 4h.10m.37s. 10. " 27, " 2 23. 503 read 2 33.503. 364, Comparisons Nos. 56 to 70 are excluded, as evidently containing some source of error not detected. 364, December 6, No. 68, for 2 37.498 read 2 27. 498. 365, " 11, MarsN. P., for 6 read 5. 366, ' ' 12, No. 27, for 3. 398 read 3. 388. 368, ' ' 17, Comparison No. 60 is excluded from the mean. 369, ' ' 27, Nos. 16, 17, 20, for 1. 080, 2. 061, 2. 074 read 1. 088, 2. 060, 2. 064. 371, '' 31, Comparison No. 21 is excluded from the mean. 373, January 5, No. 26, for 8. 609 read 8. 069. Comparison No. 33 is excluded from the mean. The results of this series of observations will then be as follows, so far as they pertain to the measurements of declinations : Washington Observations of Mars during the opposition of 1849-50. Date. Star. Cbron. time. Obron. corr. Limb. A3 No. Comp. Rev. Arc. h. m. s. *. / // 1849.— Nov. 2 B.Z. 348.84 5 29 50.74 + 43.83 8. + 0.324 4.98 3 5 10 5.14 43.81 N. + 1.681 25.84 3 4 B.Z. 348.95 4 20 37.09 49.40 N. —20.247 5 11.23 5 4 18 13.06 49.42 S. —21.736 5 34.13 5 5 23 35.02 49.46 N. —19.877 5 5.54 7 * S. —21.083 5 34.08 7 6 B.Z. 346.95 4 17 34.45 54.47 N. + 0.320 4.92 8 8. — 1.129 17.35 8 12 Lai. 12557 4 39 45.41 1 5.12 N. +14.828 3 47.93 19 S. +13.020 320.14 19 6 7 40.32 1 5.94 N. +15.504 3 58.32 6 S. +13.858 3 33.02 6 13 Lai. 12557 3 55 40.23 1 6.96 N. +26.243 6 43.40 15 S. +24.834 6 31.74 15 24 B.Z. 543.106 4 22 45.71 1 27.40 S. + 2.104 32.34 5 4 27 48.33 1 27.40 N. + 3.407 52.37 5 36 Lai. 12237 4 36 16.78 1 32.34 N. — 1.021 15.69 29 8. — 2.453 37.71 29 6 43 53.78 1 32.55 N, + 0.286 4.40 11 S. — 1 .175 18.06 11 Dec. 6 Lai. 11714 5 9 34.32 1 53.21 S. +30,451 5 14,37 13 5 11 49.06 1 53.21 N. +31.853 5 35.91 11 Lai. 11684 4 44 48.40 1 53.21 S. +14.301 3 39.83 9 4 54 41.88 1 53.21 N. +15.754 4 2.17 8 11 RUmkerl673 3 37 45.02 2 3.72 8. + 4.802 1 13.81 6 3 48 33.08 2 3.72 N. + 6.357 1 37.72 5 12 Rii inker i (WO 4 27 9.06 2 6.42 8. — 5.140 1 19.01 8 4 32 51.73 3 6.43 N. — 3.638 55.92 7 17 B. Z. 405.56 4 18 44.53 2 19.19 N. + 3.991 45,98 16 4 31 51.35 +2 19.20 8. + 1.717 26.39 S3 OBSERVATIONS. Washington Observations of Mars during the opposition of 1849-50 — Continued. Date. Star. Chron. tint*. Chron. corr. Limb. Ad No. Comp. Her. Arc. k. m. s. m. ». / // 27 B. Z. 405.28 3 56 0.34 -{-2 34.48 8. — 2.347 36.08 22 3 55 41.88 2 34.48 N. — 1.114 17.68 20 31 B. Z. 405.15 4 6 27.96 2 46.40 8. + 4.451 1 8.42 13 4 9 25.92 +2 46.40 N. + 6.036 1 32.78 12 1850.— Jan. 5 B. Z. 523.15 4 2 38.35 —1 3.10 8. — 8.097 3 4.46 13 4 25 48.43 1 3.08 N. — 6.782 1 44.25 12 9 B. Z. 533.15 3 54 39.60 54.20 8. —23.644 6 3.44 7 4 1 16.39 54.20 N. — 22.63b 5 47.98 7 12 B. Z. 396.4 3 40 55. as 45.67 S. + 4.8S14 1 14.15 8 3 42 30.36 45.67 N. + 5.922 1 31.04 6 14 B. Z. 396.4 4 26 35.37 37.94 8. — 3.577 54.98 2 4 3-1 25.12 37.93 N. — 2.329 35.80 2 22 B. Z. 405.6 4 13 11.25 21.22 8. + 8.924 2 17.17 11 4 18 27.31 21.22 N. + 9.894 2 32.08 10 29 B. Z. 405.6 3 14 13.5? 19.8B 8. — 7.765 1 59.36 3 3 20 14.31 — 19.86 N. — 6.654 1 42.28 3 We thus obtain a series of observations which, when arranged like those at Santiago, give the annexed table : STARS I. Observations with the Washington Equatorial. Date. Obs. part. Wash. S. T. Wash. M. T. t T. Star No. Star's S. Mea».Z>d. Reft. Obl'd S. No. Comp. N. 8. ft. m. 9. k. m. «. d. • t n / // « / // 1849.— Nov. 2 N. S. 5 20 44.34 14 30 56.64 —58.39518 24 +24 20 21.40 +0 15.41 0.00 +24 20 36.81 3 3 4 N. 8. 4 15 24.50 13 17 55.68 56.44588 33 24 30 54.39 —5 22.68 0.10 24 25 31.61 5 5 N. S. 5 24 24.48 14 26 44.36 56.39810 33 24 30 54.39 —5 14.81 0.09 24 25 39.49 7 7 6 N. 8. 4 18 28.92 13 13 7.78 54.44922 33 24 30 54.33 — 6.21 0.00 24 30 48.12 8 8 12 N. S. 4 40 50.53 13 11 50.28 48.45011 31 24 44 34.08 +3 34.06 0.06 24 48 8.20 19 19 N. S. 6 8 45.56 14 39 30.91 48.389-22 31 24 44 3-1.06 +3 45.76 0.06 24 48 19.84 6 6 13 N. 8. 3 56 47.19 12 23 58.25 47.48335 31 24 44 34.06 +6 32.56 0.12 24 51 6.74 15 15 24 N. S. 4 26 44.42 12 10 35.56 36.49264 23 25 27 13.40 + 42.36 0.00 25 27 55.76 5 5 26 N. S. 4 37 49.12 ', 12 13 46.63 34.49043 22 25 35 14.71 — 26.62 0.00 25 34 48.09 29 29 N. S. 6 45 26.33 14 21 2.93 34.40205 22 25 35 14.71 — 6.81 0.00 25 35 7.90 11 11 Dec. 6 N. 8. 4 51 38.35 11 48 14.49 24.50617 15 28 2 7.39 +3 51.06 0.07 96 5 58.52 8 9 N. 8. 5 12 34.90 12 9 7.60 24.49366 16 26 U 33.09 +5 25.14 0.10 36 5 58.33 11 13 11 N. S. 3 50 12.77 10 27 19.42 19.56436 13 26 1* 22.42 +1 25. H 0.00 26 17 48.19 5 6 12 N. 8. 4 32 6.83 11 5 10.69 18.53807 14 26 20 52.67 —1 7.47 0.02 26 19 44.68 7 8 17 N. 8. 4 27 37.13 10 41 2.19 13.55484 11 26 26 39.63 + 36.31 0.02 26 27 15.95 16 31 27 N. S. 3 58 25.54 9 32 36.26 — 3.602.T6 8 26 31 22.67 — 26.82 0.00 26 30 55.85 20 32 31 N. 8. 4 10 43.34 9 29 8.40 + 0.39524 5 26 27 39.52 +1 20.64 0.02 2629 0.18 12 13 1850 — Jan. 5 N. 8. 4 13 10.30 9 11 55.41 5.38328 4 26 26 47.00 -1 54.22 0.04 36 24 53.74 12 13 9 N. 8. 3 57 3.80 8 40 7.90 9.36120 4 26 26 47.15 —5 55.63 0,10 36 20 51.43 7 7 12 N. 8. 3 40 57.14 8 12 16.15 12.34185 2 26 16 13.15 +1 22.65 0.03 36 17 35.83 6 8 14 N. S. 4 29 52.31 8 53 11.48 14.37027 2 26 16 13.22 — 45.28 0.03 36 15 37.92 3 2 22 N. 8. 4 15 28.06 8 7 22.31 22.33845 3 26 5 42.68 +2 24.63 0.04 36 8 7.35 10 11 29 N. S. 3 16 54.06 6 36 26.54 +29.27531 3 +26 5 42.88 —1 50.82 0.04 +26 3 52.02 3 3 Cl OBSERVATIONS. 0.— OBSERVATIONS OF MARS I, WITH THE GREENWICH EQUATORIAL. MARS I. Observations iviili the Greenwich equatorial. Date. Obs. pan. Green. S. T. Wash. M. T. t— T. Star ' s. No. Star's °- Meas.ZW. Refr. Obs'd d. No. Comp. N. S. K. m. s. h. m. s. d. = , „ / // 0 / // 1849.— Nov. 36 N. S. 0 28 32.0 2 57 48.64 —34.87652 22 25 35 14.71 —1 47.72 0.15 25 33 26.84 2 2 30 N. S. 6 1 13.5 8 13 52.00 30.65704 20 25 45 36.56 +1 47.87 0.04 25 47 24.47 2 2 Dec. 8 C. 2 44 40 4 26 23.4 22.81501 26 5 +5 20.47 OJ3 26 10 5 15 C. j 5 8 15 6 32 1.9 15.72776 11 26 26 39.57 —2 11.77 0.04 26 24 27.76 4 27 C. i 0 51 10 1 18 29,7 — 3.94549 8 26 31 22.67 — 24.07 0.04 26 30 58.56 6 1850 Jan. 4 N. S. 4 20 15.5 4 15 33.7 + 4.17748 4 26 26 '46.97 — 46.22 0.03 26 26 0.73 3 3 5 N. S. 2 42 41.75 2 34 20.0 5.10717 4 26 26 47.00 —1 40.02 0.05 26 25 6.93 5 3 7 C. 3 2346 3 7 25.7 + 7.13016 4 j 28 26 47.04 —3 39.32 0.08 26 23 7.64 3 D.— OBSERVATIONS OF MARS I, WITH THE GREENWICH MURAL CIRCLE. MARS I. ' Observations with the Greenwich Mural Circle. Date. Obs. part. Green. S. T. Wash. M. T. t—T. Circle reading. Refr. Zenith. Obs'd 9 30 5 9 52 + 0.832 21.69 N. 5 5 37 20 5 37 28 + 0.262 6.86 8. 5 5 39 53 5 40 1 4- 0.860 22.43 26 N. 5 4 44 15 tt + 0.468 12.19 8. 5 4 49 36 Gen. Cat. N°. 8 -f 1.039 27.06 N. 5 5 33 6 — 0.492 12.82 S. 5 5 35 5 + 0.079 2.06 29 N. 3 5 26 55 5 27 2 Lai. 10669 + 2.643 1 8.91 S. 2 527 22 5 27 26 + 3.220 1 23.94 30 N. 1 M + 3.827 1 39.77 1850.-Jan. 7 N. 2 5 3347 5 34 12 B. A. C. 1562 —23.990 10 25.40 8. a 5 55 21 5 55 26 —23.436 10 10.94 8 N. 1 4 46 53 4 47 0 B. A. C. 1562 —14.390 8 15.13 S. 1 5 2 54 532 —13.789 7 58.47 N. 2 5 48 52 5 4858 —21.619 9 23.60 8. a 6 9 13 6 920 —21.060 9 9.02 9 0. 4 5 44 34 5 13 8 M —18.933 8 13.57 10 0. 4 5 18 10 5 18 19 tt —16.538 7 11.14 11 N. 2 5 27 14 5 27 22 tt —14.270 6 12.00 8. 2 5 45 16 5 45 23 —13.796 5 59.46 12 N. 2 5 37 40 5 37 43 tt —1.1.744 5 6.17 , S. 2 5 53 42 5 53 52 —11.302 4 54.64 14 N. 3 5 26 27 5 26 44 It — 6.937 3 0.83 8. 3 5 40 40 5 40 55 — 6.454 2 48.26 15 N. 3 5 2 30 5 2 47 (i — 4.538 1 58.30 S. 3 5 16 40 5 16 56 — 4.112 1 47.20 16 N. 3 5 40 25 5 40 37 H — 2.221 57.91 8. 3 5 44 20 5 44 12 — 1.733 45.25 17 N. 3 5 10 55 5 11 3 H — 0.027 0.69 8. 3 5 23 43 524 13 -f 0.481 12.55 0. 1 4 50 23 4 50 31 + 0.202 5.27 These reductions rarely afford precisely the same figures as are given in the Memoirs and Monthly Notices of the Koyal Astronomical Society, although only few cases occur in which the discordance reached an amount capable of sensibly affecting the results. This seems best expli- cable upon the assumption that some little excess of delicacy was used at the Cape in points where the consequent accuracy was not thought to warrant fuller minuteness in publication, inas- much as the effect would not be appreciable. In such instances, the figures published by Mr. Maclear have been employed ; and the only deviations from the values given by that zealous and accomplished astronomer are for those cases in which the discordance is clearly due to some oversight in the reduction. This remark applies especially to the Cape sidereal times of observation, which appear to be means between the corrected indications of the clock and those of the hour-circle, and in which the want of entire accordance seems owing merely to some slight difference in the assumed correction of the ephemeris in right-ascension. OBSERVATIONS. civ MARS I. Observations with the Cape Equatorial. Date. Obs. part. Cape S.T. Wash. M.T. t — T. Star N° Star's d. Corrected T\ -. , , % V. Comp. Date. Obs. part. Cape S.T. Wash. M.T. t J. . Obs'd Zen. Dist. Refr. Obs'd 0. N. S. h. in. s. A. m. s. d. « / // i it ° / // 1849.— Nov. 18 N. S. 6 33 48.04 8 9 50.86 — 42.65983 59 3 11. (JO 1 34.96 + 25 7 8.00 1 1 19 N.S. 6 33 8.14 8 5 15.17 41.66302 6 33.22 1 34.62 10 30.23 1 1 21 N. S. 6 21 36.84 7 55 52.30 39.66953 13 20.13 1 36.28 17 17.13 1 1 22 N. S. 7 51 5.18 38.67286 16 49.76 1 34.74 20 46.76 1 1 M N. S. 6 18 51.51 7 41 19.69 36.67963 23 19.85 1 36.63 27 16.85 1 1 25 N. S. 7 36 23.43 35.68307 26 58.27 1 37.66 30 55.27 1 1 27 N. S. 6 15 35.71 7 26 16.69 33.69008 33 50. 62 1 36.83 37 47.62 3 2 28 N. S. 6 14 23.48 7 21 8.75 32.69365 37 11.42 • 1 3S.93 41 8.42 3 2 29 N.S. 7 15 57.56 31.69725 40 30.51 1 36.49 44 27.51 1 2 30 N. S. 6 11 49.46 7 10 43.33 30.70089 43 43.13 1 38.37 47 40.13 1 2 Dec. 1 N. S. 7 5 26.18 29.70456 46 55.53 1 38.91 50 52.53 2 1 2 N.S. 6 9 3.91 7 0 6.41 28.7082fi 50 5.73 1 37.37 54 2.73 2 2 3 N. S. 6 54 43.72 27.71199 53 7.80 1 35.98 57 4.80 1 1 4 N.S. 6 49 18.46 26.71570 59 58 7.68 1 37. S6 26 0 4.68 2 2 6 N.S. 6 38 20 74 21.72337 60 1 43.96 I 37.84 26 5 40.96 2 2 7 N.S. 6 32 48.70 23.72721 4 24.53 1 37.62 R 21.53 2 1 8 N.S. 6 27 14.75 22.73108 6 56.08 1 37.61 10 53.08 2 2 8 N. S. 6 21 39.22 21 .73496 9 21.74 1 39.27 13 18.74 2 2 10 N.S. 5 56 25.05 6 16 2.34 20.73886 11 34.70 1 38.77 15 31.70 2 2 11 N.S. 5 54 42.00 6 10 33. 65 19.74278 13 43.08 1 33.68 17 -10.08 2 2 12 N.S, 5 52 58 35 6 4 44.38 18.74S71 15 41.78 1 -10.14 19 38.78 1 1 14 N. S. 5 49 28.74 5 53 23.52 16.75159 19 14.75 1 4(1.39 23 11.75 2 2 15 N. S. 5 47 43.14 5 47 42.29 15.75854 20 48 62 1 39,3'J 24 45.62 2 2 16 N. S. 5 45 57.60 542 1.12 14.76249 22 9.43 1 38.22 25 6.43 1 1 17 N. S. 5 44 12.23 5 35 20.14 13.76643 23 26.56 1 39.03 27 23.56 2 2 18 N.S. 5 43 27.16 5 30 39.44 12.77C38 24 25.64 1 39.48 28 22.64 2 2 30 N. S. 5 38 59.22 5 19 20.24 10.77824 26 3 29 1 40.98 30 0.29 1 1 21 N.S. 5 37 16.80 5 13 42.20 9.78215 26 39.40 1 40.98 30 36.46 2 2 22 N. S. 5 8 5.26 8.78605 27 6.13 1 40. 09 31 3.13 2 2 23 N.S. 5 33 55.59 5 2 29.71 7.76993 27 23.56 1 39.28 31 20.56 2 2 24 N.S. 5 32 17.64 4 58 55. Q5 6.79380 27 32.29 1 40.98 31 29,29 2 2 26 N.S. 5 29 7.21 4 45 54.38 4.80115 27 30.07 1 H9.46 31 27.07 2 2 27 N.S. 527 35.16 4 40 26.67 3. 8052 5 27 18 95 1 40 10 31 15.95 2 2 29 N. S. 5 24 33.73 4 29 38.90 — 1.81874 26 34.42 1 39.55 30 31.42 2 2 31 N.S. 5 20 53.05 4 18 2.01 + 0.17919 25 26.70 1 40.63 29 23.70 2 2 1850.— Jan. 3 N.S. 5 18 5.27 4 3 26.96 3.16903 23 13.43 1 38.82 27 10.48 2 2 4 N.S. 5 16 55 66 3 58 21.63 4.16553 2221.07 1 38.69 26 18.07 2 2 7 N.S. 5 13 46.97 3 43 25.70 7.15516 19 22.25 1 40.31 23 19.25 1 1 8 C. 5 12 50.86 3 38 33.86 8.15178 18 21.23 1 39.47 22 18.23 4 9 c. 5 11 58.33 3 33 45.56 9.14S44 17 22.09 1 39.51 21 19. (9 1 10 C. 5 11 9 31 3 29 0.77 10.14515 16 17.41 37.98 20 14.41 5 11 c. 5 10 23.91 3 24 19. SB 11.14189 15 11.24 37.81 19 8.24 5 12 c. 5 9 42.22 3 19 42.08 12.13868 14 7.97 39.22 18 4.97 5 14 c. 5 8 29.71 3 10 37.95 14.13238 12 O.U7 38.24 15 57.97 5 15 c. 5 7 58.35 3 6 10.76 15.12929 10 58.99 38.61 14 55.99 4 16 c. 5 7 31.91 3 1 48.49 16. 126 2S 9 57.81 38.36 13 54.81 5 17 c. 2 57 29.13 -f 17.12325 60 9 0.22 1 37.46 + 26 12 57.22 5 OBSERVATIONS. clvi G.— OBSERVATIONS OF MARS I. WITH THE CAMBRIDGE EQUATORIAL. A comparatively large number of observations of right-ascension only are given in the present volume; as these however not only have no relation to the problem before us, but are incapable, under any circumstances, of furnishing a trustworthy value for the parallax, (s. Astronomical Journal, N°. 103,) they have not been critically examined. To the observations for declination the following corrections or modifications have been applied :— Page 453, November 15, 16. The "unknown star" is the comparison-star of the preceding day. — (Bessel Z. 348.) 454, " 16, 17. The comparisons were evidently with the south limb, not the north. 457, December 17. Mean M,for 3' 34". 69 read 0' 34". 69. 458, " 27. The planet was smith of Bessel Z. 405, not north. 458, " 29, 30. There is some undetected error here. 459, January 1. The comparisons are neither accordant with one another nor with the mean. The second series, upon reduction, gives A7 h. in. s. h. m. s. d. 0 1 II ;/ t n ° i ii 1851— Dec. 22 9 8 22.2 8 42 11.8 — 39.63736 339 56 59.41 0.53 1 18.89 +20 5 17.01 26 9 6 28.6 24 34.9 35.64960 38 7.14 0.95 1 19.14 20 24 9.95 29 9 4 27.9 10 46.7 32.65918 21 45.96 1.68 1 19.77 20 40 32.49 30 9 3 40.9 8 $ 4.0 31.66245 15 53.11 0.81 1 17.89 SO 46 22.59 1852— Jan. 1 9 1 57.1 7 56 28.6 29.66911 3 44.37 1.52 1 20.38 20 5b 34.53 a 9 1 0.4 51 36.2 28.67250 338 57 24.82 1.55 1 21.69 21 4 55.42 3 9004 46 40.4 27.67592 50 53.50 1.61 1 21.28 21 11 26.39 5 8 57 51.3 36 39.8 25.68287 37 31.89 2.33 1 21.64 21 24 49.08 9 8 52 58.0 16 3.7 21.69718 9 34.69 3.74 1 22.67 21 52 48.72 10 8 51 38.0 10 48.0 20.70083 2 25.47 3.42 1 24.46 21 59 59.41 19 8 48 50.4 7 0 9.0 18.70823 337 47 58.55 3.44 1 23.74 22 14 25.63 13 8 47 23.1 6 54 46.1 17.71197 40 45.75 3.63 1 24.82 22 21 39.70 14 8 45 53.7 49 21.0 16.71573 33 33.38 4.30 1 26.05 22 28 53.97 15 8 44 22.4 43 54.0 15.71951 26 19.33 4.14 1 25.65 22 36 7.46 16 . 8 42 49.3 38 25.3 14.72332 19 10.04 4.53 1 28.05 22 43 17.54 19 8 38 0.9 21 49.9 11.73484 336 58 5.41 5.70 1 26.66 23 4 23.95 20 8 36 22.3 16 15.7 10.73871 51 14.37 6.22 1 26.15 23 11 15.00 21 8 34 42.9 10 40.7 9.74258 44 33.34 5.81 1 27.65 23 17 57.12 22 8 33 2.8 6 5 4.9 8.74647 37 58. 3S 6.57 1 28.64 23 24 33.82 23 8 31 22.4 5 59 28.9 7.75036 31 32.15 6.97 1 28.85 23 31 0.67 24 8 29 41.6 53 52.4 6.75426 25 15.26 7.11 1 29.03 23 37 17.88 23 826 20.1 42 39.7 4.76204 13 16.18 8.35 1 29.44 23 49 18.61 27 8 24 39.7 37 3.7 3.76593 7 32.14 8.80 1 29.28 23 55 2.94 29 8 21 21.0 25 53.6 — 1.77369 335 56 45.56 9.37 1 30.81 24 5 51.62 Feb. 2 8 14 56.7 5 3 46.8 + 2.21096 37 49.78 10.87 1 31.02 24 24 49.11 •J 8 13 24.3 4 58 18.8 3.2071G 33 42.08 10.79 1 31.03 24 28 56.74 4 8 11 53.7 52 42.5 4.20339 29 48.86 10.92 1 31.93 24 32 50.99 5 8 10 25.2 47 22.3 5.19963 26 9.72 11.58 1 31.98 24 36 30.84 G 8 8 58.8 42 6.2 6.19591 22 46.33 12.01 1 32.56 24 39 55.24 7 8 7 34.7 36 46.4 7.19220 19 36.67 12.26 1 32.66 24 43 5.25 9 8 4 53.7 26 14.0 9.18488 14 0.14 13.50 1 31.85 24 48 42.21 10 8 3 37.1 21 1.8 10.18127 11 35.68 14.59 1 32.35 34 51 8.26 11 8 2 23.2 15 52.8 11.1776'J 9 24.94 15.03 1 33.14 24 53 20.23 12 8 1 12.2 10 45.5 12.17414 7 28.26 15.29 1 32.54 24 55 16.57 13 8 0 4.1 5 41.6 13.17062 5 46.73 15.62 1 33.05 24 56 58.94 14 7 58 58.9 4 0 40.7 14.16714 4 17.26 16.31 1 32.79 24 58 28.84 16 7 56 58.2 3 50 48.5 16.16028 1 59.29 16.95 1 33.97 25 0 48.63 17 7 56 2.6 45 57.1 17.15691 1 7.70 17.30 1 32.63 25 1 39.23 18 7 55 10.3 41 9.1 18.15358 0 31.85 18.35 1 32.32 25 2 15.82 19 7 54 21.3 36 24.3 19.15028 0 8.56 18.67 1 33.51 95 2 40.62 20 7 53 35.7 31 42.9 20.14708 334 59 54.55 18.98 1 32.91 35 3 54.32 21 7 52 53.5 27 4.9 21.14381 59 50.21 19.68 1 31.79 25 2 52.26 23 7 51 39.3 17 59.1 23.13749 335 0 29.46 19.57 1 34.44 35 3 21.55 24 7 51 7.2 13 31.2 24.13439 1 1.64 20.58 1 33.03 25 1 48.97 25 7 50 38.7 3 9 6.9 25.13133 1 43.09 21.55 1 29.92 35 1 5.38 28 7 49 33.6 3 56 14.2 +588.12239 4 58.80 21.87 1 34.39 +24 57 54.46 CJXXiv OBSERVATIONS. And finally, from the Astronomische Nachrichten, N°- 833 — F — OBSEEVATIONS OF MAES II. WITH THE KEEMSMUNSTEE MEEIDIAN- CIECLE. MARS II. Observations with the Kremsmiinster Meridian-Cvi cle. Date. Kremsm. M. T. Wash. M. T. Observed CL. Observed 3. t— T. h. m. s. h. m. s. h. m. a. 0 / II d. 1852— Jan. 20 12 38 18.91 6 33 34.31 8 36 19.84 + 23 11 8.64 — 10.726686 24 12 15 55.21 6 11 10.61 8 29 38.95 23 37 9.22 — 6.742S33 Feb. 8 10 53 32.34 4 48 47.74 8 6 10.72 24 45 49.51 + 8.200553 9 10 48 17.33 4 43 32.73 8 4 51.53 24 48 29.94 9.196907 10 10 43 4.93 4 38 20.33 8 3 34.96 24 50 55.64 10.193291 24 9 35 34.89 3 30 50.29 7 51 5.85 25 1 34.31 34.146415 25 9 31 10.78 3 26 26.18 7 50 37.38 25 0 54.03 25.143358 26 9 26 50.46 3 22 5.86 7 50 12.33 24 59 55.86 26.140345 Mar. 6 8 50 10.50 2 45 25.90 7 48 56.04 24 44 58.97 35.114883 7 8 -16 22.11 2 41 37.51 7 49 3.43 24 42 37.25 36.112239 8 8 42 36.23 2 37 51.68 7 49 13.80 84 40 3.54 37.109625 14 821 3.15 2 16 18.55 7 51 16.54 24 22 40.59 43.096659 16 8 14 13.92 2 929.32 7 52 19.33 24 15 52.30 45.089923 These complete our data, so far as Mars is concerned. III. FIEST SEEIES OF OBSERVATIONS OF VENUS. The ohservations of Venus are, as has already been stated, far less numerous than those of Mars ; and not only do the rich series garnered by Lieutenant Gilliss, at Santiago, find no corresponding comparisons on the same nights with the same star, but there are scarcely a suffi- cient total number of observations in the northern hemisphere for the deduction of trustworthy results, even by the circuitous and time-consuming methods which it has been found necessary to employ. Two hundred and one Santiago observations are to be compared with the seventy- four which can be obtained from northern observers. Of these, 83 are the results of micro- metric comparisons at Santiago, and 118 are meridian determinations made there. The northern hemisphere furnishes, during the same two conjunctions, 22 micrometric observa- tions at Washington, 34 meridian ones at Greenwich, two at Altona, and 16 at Cracow. From these we are to endeavor to extract the best determination of the parallax which they will afford. OBSERVATIONS. clxxv Apparent places of stars compared with Venus during the first series of observations. No. Date. Reduction in Apparent No. Date. Reduction in Apparent a. 9. a. d. «. d. a. 3. s. it h. m. s. ° / II 3. it h. m. s. « i a 110 1850.— Oct. 18 +0.92 +2.66 16 40 56 —26 28 25.3 129 1851 — Jan. 26 -1.76 +4.92 17 46 21 —18 15 23.2 20 0.91 2.75 40 56 2i.2 29 1.68 4.74 46 21 23.4 111 Ocl. 19 +0.92 +2.71 16 42 57 —26 39 27.9 130 1850.— Nov. 9 +0.95 +4.58 17 47 15 —28 3 0.8 21 0.90 3.80 42 57 27.8 11 0.94 4.67 47 15 0.7 112 Oct. 40 +0.93 +2.84 16 49 13 —26 52 17.9 131 Nov. 9 +0.97 +4.72 17 52 25 —27 51 53.5 22 0.91 3.94 49 13 17.8 12 0.95 4.82 53 25 53.4 113 Oct. 20 +0.93 +2.84 16 50 6 —36 56 32.4 132 Nov. 9 +0.97 +4.75 17 53 29 —27 49 5.8 32 0.91 2.94 50 6 ( 32.3 11 0.96 4.62 53 29 5.8 114 Oct. 2L +0.93 +2.91 16 52 0 —27 1 14.8 133 Nov. 12 +0.96 +4.89 17 55 55 —27 50 4.5 23 0.91 3.01 52 0 14.7 14 0.95 4.94 55 55 4.5 115 Oct. 22 +0.93 +3.03 16 54 43 —26 59 38.4 134 Nov. 14 +0.95 +5.07 17 59 7 —27 39 20.4 24 0.94 3. 13 54 43 38.3 l 16 0.94 5.13 59 7 30.3 116 Oct. 23 +0.94 +3.13 16 59 45 —27 11 44.2 135 Nov. 13 +0.96 +5.02 17 59 51 —37 44 56.5 • 0.92 3.22 59 45 44.1 15 0.95 5.09 5951 56.5 117 Oct. 24 . +0.96 +3.30 17 7 9 —27 23 5.4 136 Dec. 2 +0.92 +6.03 18 4 8 —25 10 47.1 27 0.93 3.42 7 9 5.3 5 0.92 6.07 4 8 47.1 118 1851.— Jan. 5 —2.14 +7.58 17 11 15 —17 35 35.2 137 Nov. 15 +0.97 +5.20 18 4 47 —27 33 3.4 10 2.02 7.20 11 15 35.6 18 0.95 5.31 4 47 3.3 15 1.81 6.80 11 15 30. 0 138 Nov. 29 +0.92 +5.94 18 6 41 —25 44 59.6 119 1850.— Oct. 28 +0.94 +3.47 17 13 51 —27 50 49.5 Dec. 1 0.92 5.98 6 41 59.5 31 0.91 3.61 13 51 49.3 139 Nov. 17 +0.96 +5.33 18 7 2 -27 27 14.3 120 Ocl. 26 +0 96 +3.48 17 13 23 —27 31 21.2 19 0.95 5.40 7 2 14.1 30 0.92 3.64 13 33 31.0 140 Nov. 20 +0.94 +5.52 18 8 41 —37 5 20.8 121 Oct. 30 +0.93 +3.58 17 13 53 -37 48 59.1 32 0.94 3.57 8 41 30.7 Nov. 1 0.91 3.66 13 53 59.0 141 1851 — Feb. 4 -1.63 +3.77 18 9 3 —18 50 44.9 133 1851 — Jan. 14 —1.93 +6.79 17 13 53 —17 33 3.1 6 1.58 3.68 9 3 44.9 18 1.83 6.47 13 53 2.4 143 1850.- Nov. 28 +0.92 + 5.94 18 9 31 —25 59 3.7 133 Jan. 17 —1.89 +6.32 17 21 16 —17 41 6.1 30 0.93 5.97 9 31 3.6 19 1.83 6.16 31 16 6.3 143 Nov. 27 +0.93 +5.90 18 11 54 —36 8 36.9 134 Jan. 10 —1.85 +6.04 17 35 16 —17 43 36.6 28 0.93 5.92 11 54 30.9 21 1.77 5.88 25 16 26.8 144 1851.— Feb. 5 —1.62 +3.62 18 13 35 —18 55 1S.7 125 1850.— Nov. 1 +0.98 +4.14 17 28 46 —27 56 53.2 8 1.54 3.50 12 35 12.8 3 0.94 4.03 28 46 53.4 145 1850.— Nov. 35 +0.94 +5.84 18 13 9 —36 38 43.0 5 0.93 4.10 28 46 53.3 37 0.93 5.90 13 2 42.9 136 1851.— Jan. 22 — 1.80 +5.63 17 31 59 —17 59 46.5 146 Nov. 24 +0.94 +5.85 18 15 20 —26 33 47.7 26 1.96 5.36 31 59 46.7 36 0.94 5.89 15 20 47.6 127 Jan. 33 —1.81 +8.33 17 38 42 —18 3 38.1 147 Nov. 23 +0.95 +5.84 18 18 24 —26 43 54.7 27 l.VO 5.08 38 43 38.4 25 0.95 5.89 1834 54.7 138 1850 NOT. 5 +0.97 +4.37 17 43 53 —38 0511.1 148 1851.— Feb. 9 -1.57 +3.12 18 23 41 —19 4 20.9 9 0.94 4.52 43 53 50.0 11 1.51 3.05 23 41 20.9 clxxvi OUSKKVATIONS. A.— OBSERVATIONS OF VENUS I. WITH THE SANTIAGO EQUATORIAL. The following changes have been made from the printed observations : Page 222, October 22. Eemarks. — All the observations from N°. 57, inclusive, are assumed to be recorded 1 rev. too 223, ' 228-9, " 26, 233-4, November 2, great ; not the others too small, as printed. 23, N°. 34, Micr. for 20r. 37 read 20r. 78. The sign of A<5. Refr. Obs'd S. N'. of coinp. N. 8. h. m. i. A. m. s. d. « / ii / ;/ „ ' 1850.— Ocl. 19 N. 22 25 50.70 8 7 23.03 —56.66155 110 —26 28 25.21 —3 56.61 0.22 -26 32 32.04 33 20 N. 23 11 55.14 7 49 32.85 55.67392 111 26 39 37.85 -2 8.93 .08 26 41 36.86 36 22 N. 22 21 4.80 7 50 49.19 53.67304 114 27 1 14.74 +3 33.53 .15 26 58 42 06 44 23 N. 22 19 41.90 7 45 30.61 52.67673 115 26 59 38.32 —6 47.09 .26 27 6 25.67 40 24 N. 22 6 7.53 7 28 2.55 5i. 68886 116 27 11 44.10 —1 46.81 .06 27 13 30.97 36 25 N. 22 36 59.11 7 54 53.17 50.67022 117 —27 23 5.40 +3 52.41 .03 —27 20 12.97 21 26 N. 22 16 46.07 7 30 47.53 49.68695 117 27 23 5.36 —3 8.72 .10 37 26 14.18 27 29 N. 21 55 30.16 6 57 47.39 46.70987 119 27 50 49.40 +9 46.65 .24 87 41 2.51 3 N. 23 22 33.58 8 24 36.55 46.64958 119 27 50 49.40 +9 33.24 .80 37 41 15.36 4 30 N. 83 51 43.36 7 49 55.56 45.67366 119 27 50 49.35 +5 43.61 .33 87 45 5.51 5 31 N. 22 58 51.39 7 53 6.42 44.67145 121 —27 48 59.03 + 38.73 .02 -27 48 30.28 9 Nov. 1 N. 22 41 8.48 7 31 30.50 43.68645 125 27 56 53.24 +5 33.40 .19 27 51 19.65 22 9 N. 22 59 11.28 7 45 34.44 42.67668 125 37 56 53.30 +3 12.29 .13 27 53 40.88 31 4 N. 22 33 37.34 7 12 12.87 40.69985 125 37 58 53.31 + 4.76 .00 27 56 48.55 9 6 N. 23 58 11.79 7 28 51.48 38.6b829 128 28 0 50.07 +2 54.94 .07 37 57 55.06 19 7 N. 22 59 47.05 7 26 30.57 37.68992 128 —28 0 50.03 +3 8.02 .11 —27 57 41.90 17 8 N. 32 59 3.94 7 21 51.67 36.69315 128 28 0 49.99 +3 47.82 .13 27 57 2.05 18 10 N. 22 28 27.40 6 43 28.32 34.71981 131 27 51 53.44 —2 25.29 .06 27 54 18.79 1 11 N. 23 24 2.89 7 34 58.80 33.68404 131 27 SI 53.41 — 12.32 .01 27 52 5.74 29 13 N. 23 29 15.60 7 32 18.84 31 .68589 133 37 50 4.50 +3 38.52 .15 27 46 25.83 24 14 N. 23 34 40.74 7 33 47.17 30.68487 135 —37 44 56.48 +2 1 .75 .09 —37 42 54.64 27 15 N. 22 49 2). 55 6 44 41.50 29.71896 134 37 39 20.34 + 16.27 .01 27 39 4.08 3 N. 23 35 11.06 7 30 21.51 29.68724 134 2T 39 20.34 + 85.26 .03 37 38 55.06 13 16 N. 23 30 58.43 7 22 13.65 28.69290 137 27 33 3.33 —2 27.03 .10 27 34 30.46 18 17 N. 23 13 10 49 7 0 32 73 27.70796 137 27 33 3.30 +2 24.05 .08 27 29 39.17 10 18 N. 23 4:= 2. 89 Mean Chron'r time for 5A. 57m. 9s.. 72 read 5h. 56m. 48s. 55 2- 17" 22 llr. 135 =: 2' 51". 16 5' 24". 35 5A. 42m. 44s. 38 21r. 793 =± 5" 35". 00 two " 2' 17". 26 llr. 315 = 2' 53". 92 5' 24". 25 time 5A. 41m. 29s. 38 21r. 797 = 5' 35". 06 three The comparisons in declination with the second star give — Venus S — ° (2 comparisons) = — 14r. 231 = 3' 38". 74 Af = I". 32 ;2 " ) = — 11 .367 = 2 54 .73 Ap= 1 .05 Ir. 948 == 27". 94 read Ir. 815 = 27". 90 uld be negative. for 6r. 879 = 1'45".74 read 6r.900 = 1'46".06 The comparison-star is Argel .391. 70. The observation of October 19 is excluded from the discussion. VENUS I. Observations with the Washington Equatorial. Date. Obs. part. Wash. S.T. Wash. M.T. t—T. Star N°. Star's d. Meas'd D3. Kefr. Obs'd §_ N°. comp. N. S. 1850. A. in. s. A. m. s. 0 II i ii it ° / it Oct. 19 N.S. 20 8 23.71 6 16 6.61 —56.738816 no —26 28 25.21 —4 23.86 1.78 —26 32 50.85 4 3 21 N.B. 20 11 51.14 6 11 41.66 54.736182 f 112 26 j 52 17.85 + 1 52.72 0.70 26 SO}24'43 4 4 I 113 (56 32.32 +6 7.54 2.69 '22.09 4 4 • N.S. 20 1 25.02 5 87 23.35 53.751814 114 27 1 14.74 +2 34.19 0.46 26 58 40.09 5 4 38 N.S. 20 25 35.48 5 57 52.40 47.751478 12U 27 31 21.08 —5 42.23 2.01 27 37 5.32 3 3 Nov. 1 N.S. 20 31 13.19 5 47 45.55 43.758501 125 27 56 53.24 +5 0.07 1.47 27 51 51.70 4 4 a N.S. 20 30 26.21 543 380 42.761773 125 27 56 53.29 +2 38.23 0.70 27 54 14.36 8 8 9 N.S. 20 52 45.79 5 37 47.38 35.765424 130 28 2 0.83 -j-5 11.49 1.54 27 56 47.80 3 3 10 N.S. 30 58 58.72 5 40 3.36 34.763950 131 37 51 53.45 —3 16.74 1.18 27 55 11.37 3 2 N.S. 20 36 45.51 5 17 53.79 34.779239 130 28 2 0.78 +6 47.88 1.88 27 55 11.03 2 3 13 N.S. 21 3 43.99 5 33 0.13 31.768748 133 27 50 4.50 +2 28.78 0.80 27 47 34.92 4 4 14 N.S. 20 59 54.68 5 25 15.53 30.774127 135 27 44 56.48 + 50.52 0.34 27 44 5.72 4 4 21 N.S. 21 17 19.48 5 15 6.11 —23.781180 140 —27 5 20.73 —1 32.02 0.44 27 6 55.19 10 11 1851. Jan. 13 N.S. 14 12 19.71 18 38 56.76 +29.777047 118 17 35 35.80 +6 20.50 6.13 17 29 9.17 12 13 15 N.S. 13 54 26.81 18 13 14.98 31.759202 122 17 33 2.17 +1 21.56 0.14 17 31 40.47 16 16 24 N.S. 14 21 23.34 18 4 43.90 +40.753286 126 —17 59 46.61 — 27.23 0.05 —18 0 13.88 4 4 OBSERVATIONS. From the Greenwich volumes we obtain the meridian observations, D.— OBSERVATIONS OF VENUS I. WITH THE GREENWICH MURAL CIRCLE. VENUS I. Observations with the Greenwich Mural Circle. Date. Obs. part. Green. S.T. Wash. M.T. t-T. Circle-reading. Refr. Zenith Pt. corr. Observed 3. Semid. 83° 31' h. m. t. A. m. 8. d. // / ;/ // "in it 1850.— Oct. 15 S. 16 23 6.00 — 2 20 12.3 — 61.09736 51.95 4 9.91 26.52 — 25 44 43.06 IS. 11 16 0. 16 27 3.85 2 20 11.0 60.09770 25.13 4 11.94 26.52 25 56 23.38 21 N. 16 46 25.15 2 20 32.4 55.09760 44.00 4 31.43 25 62 26 47 29.23 16.59 Nov. 11 N. 17 52 15.24 2 37 27.1 34.10934 39.30 4 55.26 24.28 27 53 58.00 24.88 28 N. 18 8 48.90 3 27 46.7 17.14429 52.23 4 24.80 23.03 26 10 45.90 29.07 29 N. 18 8 16.68 3 3J 14.7 16.14739 37.60 4 22.16 23.03 26 0 28.96 29.38 Dec. 6 N. 17 59 37.56 — 4 8 23.8 — 9.17250 0.18 3 53.97 20.82 24 34 30.09 33.93 27 0. 17 10 44.24 17 36 20.9 -f- 12.73358 38.12 2 46.44 20.73 18 55 26.65 + 8- 1851.— Jan. 8 N. 17 5 50.23 16 44 16.7 24.69742 50.30 2 32.83 37. -J5 17 3247.17 24.30 17 N. 17 16 44.89 16 19 46.4 33.68040 55.52 2 34.18 39.05 17 35 £2.32 21.00 22 N. 17 27 11 03 16 10 31.3 38.67397 58.73 2 38.70 38.90 17 51 59.34 19.20 29 N. 17 45 56.90 16 1 42.7 45.66786 42.83 2 37.03 38.51 1821 37.90 17.30 Feb. 2 N. 17 58 26.66 15 58 26.8 49.66559 38.19 2 41.61 38.51 18 38 36.40 16.30 3 S. 18 1 44.91 15 57 48.6 50.66515 8.93 2 43.58 38.37 18 42 35.73 16.60 5 N. 18 8 32.14 15 56 42.9 52.66439 6.90 2 42.94 38.37 18 50 5.68 15.60 7 N. 18 15 33.65 15 55 51.4 54.66379 52.69 2 41.79 38.37 18 56 49.90 15.20 16 S. 18 49 40.82 15 54 29.8 -f- 63.66284 39.59 2 52.30 38.13 — 19 13 19.14 13.50 To which are added finally the two observations at Altona, (A.N. XXXIII, 23.) E.— OBSERVATIONS OF VENUS I. WITH THE ALTONA MERIDIAN-CIRCLE. VENUS I. Observations with the Altona Meridian-Circle. C ESTER. Date. Altona M.T. Wash. M.T. ObB'd a. Obs'd d. t—T. 1851.— Jan. 27 31 h. m. s. 21 12 3 21 8 11 A. m. ». 15 24 6 15 20 14 h. m. s. 17 40 4.08 17 51 57.81 ° t H —18 12 27.9 —18 29 52.6 +43.641736 +47.639051 clxxxii OBSEEVATIONS. IV. SECOND SERIES OF OBSERVATIONS OF VENUS. Apparent places of stars compared with Venus during the second series of observations. No. Date. Reduction in Apparent. No. Date. Reduction in Apparent a. d. a. 8. «. d. a. 8. s. it h. m. *. o / // 1 '• ir A. m. s. « / // 38 1852.— Aug. 11 —0.22 +0.90 7 26 52 +15 15 2.3 59 1852.— June 3 —0.82 +1.13 7 59 14 +22 50 46.5 14 0.16 0.94 26 52 2.3 7 0.83 1.15 59 14 46.6 37 Aug. 15 —0.14 +0.92 7 29 28 +15 24 43.1 61 Sept. 2 +0.13 +0.39 8 5 27 +16 4 21.1 17 0.10 0.93 29 28 43.1 4 0.19 0.32 5 27 21.0 38 July 30 —0.45 +0.74 7 29 29 +14 40 7.6 64 Jan. 18 +0.47 —4.02 8 11 44 +24 28 59.3 Aug. 1 0.42 0.80 29 29 7.7 28 0.57 3.83 11 45 59.5 39 Aug. 7 9 —0.31 0.27 +0.89 0 90 7 30 38 30 38 +14 53 37.5 37.5 Feb. 7 17 0.61 0.60 3.43 2.90 11 45 11 45 59.9 29 0.4 27 0.55 2.27 11 45 1.0 40 Aug. 3 —0.38 +0.82 7 30 58 +14 47 39.9 Mar. 8 0.45 1.61 11 44 1.7 5 0.35 0.86 30 58 40.0 18 0.32 0.92 11 44 2.4 41 Aug. 20 —0.05 +0.88 7 32 44 +15 40 22.9 66 Feb. 2 +0.60 —3.65 8 13 11 +24 29 18.8 22 0.00 0.89 32 44 22.9 4 0.61 3.57 11 11 18.9 & July 29 —0.47 +0.70 7 33 42 —14 33 1.5 68 Jan. 31 +0.59 —3.77 8 16 9 +2425 1.6 31 0.44 0.76 33 42 1.6 Feb. 3 0.61 3.66 16 9 1.7 43 Aug 21 —0.03 +0.85 7 33 50 +15 49 52.0 70 June 9 —0.75 +1.32 8 19 28 +21 38 17.2 24 +0.04 0.84 33 50 51.9 13 0.76 1.32 19 28 17.2 44 Aug. 24 +0.03 +0.35 7 38 58 +15 53 1.0 74 June 11 —0.75 +1.31 8 21 43 +21 20 55.6 28 0.12 0.27 3858 0.9 13 0.75 1.33 21 43 55.6 45 May 29 —0.88 +1.04 741 51 +24 9 13.7 75 July 8 —0.69 +0.68 8 24 24 +15 46 20.8 31 0.89 1.03 41 51 13.7 10 0.70 0.71 24 24 20.9 46 Aug. 27 +0.07 +0.70 7 44 53 +15 58 41.1 76 July 5 -0.70 +0.70 8 26 58 +16 14 8.5 30 0.14 0.65 44 53 41.1 7 0.69 0.74 26 58 8.5 50 May 29 —0.85 +1.14 7 47 14 +24 0 39.0 81 June 14 —0.71 +1.35 8 31 10 +20 36 13.6 June 2 0.87 1.12 47 14 39.0 16 0.72 1.36 31 10 13.6 51 Aug. 27 +0.06 +0.62 7 4835 +16 10 63.2 83 June 22 —0.71 +1.05 8 32 24 +18 46 15.7 30 0.13 0.57 48 35 53.2 24 0.72 1.07 32 24 15.7 S3 June 1 —0.85 +1.12 7 50 52 +23 34 51 .2 84 June 21 —0.71 +1.09 8 32 35 +19 0 44.1 3 0.86 1.12 50 52 51.2 23 0.72 1.12 32 35 44.1 96 Sept. 1 +0.15 —0.54 7 53 31 +1558 1.9 86 June 23 —0.69 +1.16 8 39 24 +18 35 43.9 3 0.20 0.47 53 31 1.8 25 0.69 1.18 39 24 43.9 A.— OBSERVATIONS OF VENUS II. WITH THE SANTIAGO EQUATORIAL. The corrections to the observations are : The sign of A5 is to be reversed, except in the following cases : Page 283, June 12 Page 288, July 6 Page 299, August 31 284, 285, 287, 15 22 24 Page 288, July 289, 294, " 299, " 9 13 28 303, September 7 Page 282, No. 12, Object for P. read S. P. 291, /orH.C. 14861 " W. VII. 905 Remarks. Corrected diameter for 56". 53 read 56''. 33 And then for the deduced results : The sign of A<5 ia to be reversed, except in the following cases : Page 284, June 12 295, August 16 Page 284, June 12, line 6, for B. read" 287, " 23, "1,2, '• 3r. 102 = I'O". 46 read 3r. 118 = 1' 0". 77 OBSERVATIONS. We thus have the accompanying groups of observations : VEJTUS n. Observations with the Santiago Equatorial. clxxxiii Date. Obs. part. Sant. S.T. Wash. M.T. t—T. Star N°. Star's d. Meas>dZ> i it d. 185S.— June 2 3 641.0 20 38 38.6 7 51 23.83 +23 34 39.68 —43.139831 3 3 5 46.3 20 37 43.9 7 54 25.48 23 22 27.26 42.140465 4 3 4 46.3 20 36 43.9 7 57 21.94 23 9 58.81 41.141159 5 3 3 42.0 20 35 39.6 8 0 13.98 22 57 17.77 40.141904 7 3 1 16.6 20 33 14.2 8 5 41 .27 22 31 6.57 38.143586 8 2 59 55.2 20 31 52.8 8 8 16.23 22 17 46.46 37.144524 11 2 55 18.3 20 27 15.8 8 15 28.13 21 36 55.44 34.147734 12 2 53 33.2 20 25 30.8 8 17 39.51 21 23 3.94 33.148949 14 S 49 44.6 20 21 42.2 8 21 43.35 20 55 16.91 31.151598 17 2 43 10.0 80 15 7.6 8 26 57.27 20 13 0.68 28.156162 18 2 40 44.5 20 12 42.1 8 28 27.99 19 59 8.04 27.157847 23 2 26 36.9 19 58 34.5 8 34 0.84 18 50 9.39 22.167655 26 2 16 25.9 19 48 23.5 8 35 37.84 18 10 31.48 19.174728 27 2 12 44.2 19 44 41.8 8 35 52.07 17 67 35.11 —18.177293 AUR 17 21 39 56.5 15 11 54.1 7 27 20.50 15 31 1.83 +33.633365 18 21 37 3.9 15 9 1.5 7 28 24.00 +15 34 32.56 +34.631968 These complete the collection of such determinations of the positions of Mars and Venus as have been found capable of employment for our purpose, extending from November 2, 1849, to Septmber 8, 1852. §7. OBSERVATIONS COMPARED WITH EPHEMEMS. The next step to be taken is the computation of the tabular places for the moment of observation, and the comparison of these with the declinations observed. The course of this computation and comparison may readily be followed by means of the appended tables, which contain all those values which strictly depend upon the ephemeris, or upon computation ; the term "computed place" being considered as denoting the apparent place of that part of the planet which was actually observed (whether limb or center) deduced from the ephemeris for the point and moment of observation. The mean of a nearly equal number of determinations of the two limbs is, however, considered as an observation of the center, affected merely by the influence of defective illumination. This influence might, in fact, have been disregarded for Mars in every instance, although it has been brought into the computation as a matter of form. Consequently the tables of "Computation for observations" afford for each observation the tabular right-ascension, declination, parallax, semidiameter, and resulting declination of the part observed ; and appended to these the residual error of the ephemeris, as indicated by the observations. OBSERVATIONS COMPARED WITH EPHEMEKIS. clxxxv.i MARS I. Computation for Santiago Equatorial Observations. Dale. Wash. M. T. in dec. of day Tub. Ct. Tab. 3. Parallax. Semicl. Def. ill. Obs'd part. Comp. O. Ad. «. 8. I a. 8. li m. s. o ; u '• II S. 1! a * 1 II 1849.— Dec. 10 .515529 5 55 57.47 +86 16 13.0 —0.05 +12.704 0.54 8.03 0. +26 16 25.7 +18.2 11 .427736 54 22.20 18 8.4. + .48 12.214 0.54 8.03 c. 1 18 20.6 20.8 .464571 54 18.37 18 12.9 + .22 12.550 0.54 8.03 0. 1825.4 21.3 •'MM 54 13.72 18 17.7 — .03 12.712 0.54 8.03 c. 18 30.4 19.5 13 .411837 52 39.54 20 4.7 + .48 11.899 0.54 8.03 c. 20 16.6 19.6 .445221 52 36.04 20 8.4 + .31 12.398 0.54 8.03 c. 20 20.8 16.7 13 .491435 50 46.06 23 1.9 + .09 12.713 0.54 8.03 c. 22 14.6 19.0 14 .47:1089 49 2.37 23 39.3 + .11 12.669 0.53 8.02 c. 23 52.0 18.6 15 .415880 47 22.53 25 3.7 + .40 12.142 0.53 8.01 0. 25 15.8 18.5 .489014 47 14.78 25 10.0 — .01 12.696 0.53 8.01 0. 25 22.7 17.4 16 .410701 45 37.12 26 24.2 + .41 12.106 0.53 8.00 c. 26 36.3 18.3 17 .454176 43 46.76 27 38.4 + .15 12.583 0.53 7 98 c. 27 51.0 18.3 18 .431221 42 3.88 28 38.5 + .25 19.412 0.53 7.96 0. 28 50 9 18 7 20 .426719 38 35.96 30 13.3 + .23 12.376 0.53 7.92 0. 30 25.7 19.2 .516089 38 26.74 30 16.7 — .27 12.311 0.53 7.92 c. 30 29.0 ' 17.4 21 .416486 36 51.37 30 46.9 + .27 12.276 0.53 7.89 c. 30 59.2 19.9 32 .445462 35 10.13 31 12.6 + .07 12.44S 0.59 7.86 c. 31 25.1 18.8 23 .422466 33 32.66 31 28.8 + .19 12.299 0.52 7.83 c. 31 41.1 18.9 24 .431593 31 53.73 31 37.2 + .12 12.330 0.52 7.79 c. 31 49.5 18.4 25 .428879 30 17.91 31 37.8 + .11 12.268 0.52 7.76 c. 31 50.1 18.1 26 .4-29688 28 43.84 31 30.8 + .09 12.223 0.51 7.72 c. 31 43.0 17.8 27 .439454 27 11.21 31 16.6 + .01 12.181 0.51 7.68 c. 31 28.8 17.3 30 .400840 22 54.97 29 57.9 + .16 11.879 0.50 7.55 c. SO 9.8 15 5 31 .408113 21 32.35 2920.0 + .10 11.853 0.50 7.50 —0.01 0. 29 31.8 13.4 1850.— Jan. 1 .402747 20 14.38 28 37.9 + .11 11.766 0.50 7.45 .01 c. 28 49.7 15.8 2 .405376 18 56.80 27 51.1 + .07 11.709 0.49 7.39 .01 c. 28 2.8 15.1 4 .408426 16 37.38 26 6.5 + .02 11.547 0.49 7.29 .01 c. 26 18.0 16.0 6 .365404 14 32.03 24 13.2 + .20 11.217 0.48 7.18 .01 c. 24 24.4 16.2 .433114 14 27.92 24 9.2 — .14 11.287 0.48 7.17 .01 c. 24 20.5 15.9 7 .396962 1331.23 23 10.3 + .02 11.271 0.47 7.12 .01 c. 23 21.6 16.4 8 .398542 12 35.78 32 7.6 .00 11.178 0.47 7.U6 .01 0. 22 18.8 16.1 9 .391292 11 44.34 21 4.4 + .02 11.082 0.47 7.00 .01 o. 21 15.5 16.0 10 .405308 10 55.46 19 59.2 — .07 10.967 0.46 6.94 .01 c. 20 10.2 13.9 11 .393909 10 11.41 18 55.2 — .03 10.865 0.46 6.88 .01 0. 19 6.1 13.7 19 .385899 9 30.81 17 51.2 .00 10.790 0.45 6.82 .01 c. 18 2.0 14.3 13 .376816 8 53.91 16 47.9 + .03 10.688 0.45 6.76 .01 0. 16 58.6 14.7 14 .387213 8 19.91 15 44.3 — .02 10.584 0.45 6.69 .02 c. 15 54.9 14.7 15 .382530 7 50.14 14 42.4 — .03 10.486 0.44 6.63 .02 c. 14 53.9 16.0 .436439 7 48.63 14 39.1 — .28 10.161 0.44 6.62 .02 c. 14 49.3 13.2 16 .381733 7 24.72 13 41.9 — .04 10.384 0.44 6.57 .02 c. 13 52.3 14.5 17 .380340 7 1.38 12 43.2 — .05 10.281 0.43 6.51 .02 c. 12 53.5 15.0 18 .380105 6 42.45 11 46.4 — .08 10.175 0.43 6.45 .02 0. 11 56.6 15.3 19 .359055 6 27.41 10 52.8 + .02 10.089 0.43 6.38 .02 c. 11 2.9 9.5 20 .354745 6 15.64 10 0.5 + .03 9.990 0.42 6.32 .02 0. 10 10.5 11.1 21 .SWWS 8 7.97 9 9.8 — .04 9.886 0.42 6.26 .02 c. 9 19.7 10.8 22 .369468 6 2.51 8 22.2 — .06 9.778 0.41 6.20 .02 c. 8 32.0 11.9 23 .351916 6 1.22 7 38.1 .00 9.697 0.41 6.14 .02 c. 7 47.8 12.4 .407392 6 1.24 7 35.7 — .24 9.448 0.41 6.14 .02 c. 7 45.1 10.6 24 .373805 6 3.36 6 55.1 — .10 9 552 0.41 6.08 .02 c. 7 4.6 11.8 25 .364575 6 8.77 6 16.2 — .07 9.478 0.40 6.0-J .02 c. 6 25.7 11.4 96 .365774 6 17.51 5 39.5 — .09 9.370 0.40 5.96 .02 c. 5 48.9 11.6 27 .348543 6 29.26 5 6.2 — .03 9.310 0.39 5.90 .02 c. 5 15.5 11.7 28 .362791 6 34.01 4 34.5 — .10 9.174 0.39 5.84 .02 0. 4 43.7 19.6 M .349222 7 2 64 4 6.3 — .05 9.113 0.39 3.78 .02 0. 4 15.4 11.6 31 .351182 5 7 48.33 +26 3 16.9 —0.08 + 8.913 0.38 5.66 —0.02 0. +26 325.8 +11.9 clxXXViii OBSERVATIONS COMPARED WITH EPHEMERIS. MARS I. Computation of observations ivith the Washington Equatorial. Date. Wash. M.T. in dec. of day. Tab. a. Tab. 3. Parallax. Senml. Obs'd part. Comp'd O. Ad. a. s. a. d. A. m. .v. 0 •• It 8. It ° / n n 1649.— Nov. 9 .604822 6 25 51.09 +34 21 1.5 +0.19 —3.16 0.44 6.59 C. +24 20 58.3 + 21.5 4 .554117 6 26 25.52 34 25 54.7 0.38 3.67 0.45 6.71 0. 24 25 51.0 19.4 .601903 6 26 26.19 34 36 2.1 0.19 3.18 0.45 6.71 C. 34 35 58.9 19.4 6 .550/84 6 26 46.81 34 31 10.6 0.38 3.68 0.45 6.81 0. j £4 31 6.9 18.8 12 .549888 6 26 21.82 34 48 33.1 0.33 3.58 0.47 7.12 0. | 34 48 29.6 21.4 .610775 6 36 20.86 34 48 44.4 0.06 3.15 0.47 7.12 0. 24 48 41.3 21.4 13 .516646 6 26 4.80 34 51 33.6 0.46 3.96 0.48 7.17 0. 34 51 29.6 22.9 24 .507357 6 18 39.10 25 38 20.3 0.38 3.75 0.51 7.67 C. 35 28 16.6 20.8 26 .509567 6 16 29.66 25 35 11.5 0.34 3.66 0.52 7.74 0. 35 35 7.9 29.8 .597951 6 16 23.62 25 35 29.6 0.10 3.36 0.52 7.74 0. 25 3536.3 18.4 Dec. 6 .506337 6 2 36.75 26 6 25.4 0.18 3.32 0 53 7.99 0. 26 6 22.1 23.8 .491834 6 2 38.11 26 6 33.0 0.18 3.44 0.53 7.99 C. 26 6 19.6 21.1 11 .435643 5 54 51.37 28 18 9.4 0.44 3.90 0 54 8.03 0. 36 18 5.5 17.3 12 .461928 5 52 34.30 36 30 10.3 0.29 3.47 0.54 8.03 C. 36 20 6.8 22.1 17 .445164 5 43 47.72 86 27 37.8 0.28 3.39 0.53 7.98 C. 36 27 34.4 18.4 27 .397642 5 37 15.00 36 31 17.3 0.31 3.34 0.51 7.68 0. 26 31 14.0 18.2 31 .395237 5 31 33.38 26 29 20.6 0.24 3.14 0.50 7.50 C. 1 26 29 17.5 17.3 1850.— Jan. 5 .383381 5 15 33.31 26 25 11.3 0.21 2.99 0.48 7.33 0. 26 25 8.3 15.6 9 .361203 5 11 45.84 26 31 6.3 0.34 3.98 0.47 7.00 C. 26 21 3.3 11.9 12 .341853 5 9 32.53 26 17 54.1 0.27 3.01 0.45 6.82 0. 26 17 51.1 15.3 14 .370371 5 8 20.45 26 15 45.2 0.12 2.71 0.45 6.69 0. 26 15 43.5 14.6 22 .338453 5 6 3.61 26 8 23.6 0.14 2.57 0.41 6.20 0. 26 821.0 13.7 29 .275307 5 7 1.18 +26 4 8.3 +0.28 —2.73 0.39 5.78 0. -fS6 4 5.6 + 13.« MARS I. Computation of observations with the Greenwich Equatorial. Parallax. Semid. Date. Wash. M.T. in dec. of day. Tab. «. Tab. S. Obs'd part. Comp'd d. Ad. a. d. a. 8. A. m. s. o / // a. ii «. n o / // 1849.— NOT. 26 .123480 6 16 55.70 +25 33 52.6 —9.77 0.51 7.72 0. +35 33 43.9 +16". 1 30 .342963 6 11 44.33 35 47 58.0 6.21 0.52 7.86 0. 25 47 51.8 (27.3) Dec. 8 .184993 5 59 52.37 26 10 46.6 +0.51 7.62 0.53 8.01 C. 36 10 39.0 15 .272244 5 47 37.75 26 24 51.4 0.09 6.22 0.53 8.01 0. 36 34 45.3 17.4 27 .054511 5 27 46.24 26 31 2S.8 0.61 8.45 0.51 7.70 0. 26 31 14.3 15.8 1850.— Jan. 4 .177475 5 16 53.03 26 36 19.6 0.16 5.74 0.49 7.30 0. 26 26 13.9 13.2 5 .107174 5 15 51.10 36 25 27.2 0.39 6.40 0.48 7.24 0. 36 25 20.8 13.9 7 .130159 5 13 46.60 +28 23 26.7 +0.35 -5 92 0.48 7.13 0. +26 23 20.8 + 13.1 OBSERVATIONS COMPAKJBD WITH EI'HEMERIS. clxxxix 31 Alls I. Computation for Greenwich Meridian Observations. Dnte. Wash. M.T. in dec. of day. Tabular Parallax in d. Semid. Comp. d. Ati. a. d. «. d. A. TO. (. o / // " i. n * i n n 1849.-Nov. 1 .436909 6 25 24.24 +24 18 13.0 —5.45 0.44 6.55 +24 18 7.55 + 14.0 6 .426201 26 45.90 24 30 50 4 5.62 0.45 6.80 24 30 44.78 18.0 16 .397591 24 53.91 25 0 48.6 5.93 0.49 7.31 25 0 42.67 19.0 30 .350261 11 43.74 ; 25 47 59.3 6.21 0.52 7.86 25 47 53 09 19.9 Dec. 4 .335377 6 6 0.55 26 0 18.9 6.24 0.53 7.96 26 0 12.66 18.9 8 .320051 5 59 38.94 26 11 16.7 6.24 0.53 8.01 26 11 10.46 18.3 15 .292590 47 35.59 26 24 53.2 6.18 0.53 . 8.01 26 24 47.02 19.8 17 .284694 44 4.67 86 27 27.1 6.15 0.53 7.98 26 27 20 95 18.9 19 .276816 40 35.34 26 29 23.2 6.11 0.53 7.94 26 29 17.09 18.5 27 .245890 27 28.78 26 31 19.9 5.91 0.51 7.69 26 31 13.99 15.1 28 .242129 25 59.32 26 31 0.5 5.87 0.51 7.65 26 30 54.63 16.6 29 .238397 24 32.37 26 30 35.0 5.84 0.51 7.61 26 30 39.16 16.1 1850.— Jan. 4 .216678 16 50.35 26 26 17.1 5.62 0.49 7.30 26 26 11.48 16.2 5 .213183 15 44.27 26 25 21.0 5.59 0.48 7.24 26 25 15.41 15.5 7 .206315 13 42.19 26 2322.0 5.50 0.48 7.13 26 23 16.50 15.6 23 .157303 6 1.22 26 7 46.6 4.80 0.41 6.15 26 7 41.80 13.6 30 .139089 7 19.22 26 3 45.6 4.48 0.38 5.73 26 3 41.12 11.4 Feb. 6 .122584 11 5.19 26 47.3 4.18 0.36 5.35 86 43.12 9.8 7 .120352 11 48.52 26 38.7 4.14 0.35 5.30 98 34.56 9.4 9 .115982 13 23.00 26 26.7 4.06 0.35 5.19 36 22.64 8.9 13 .107584 17 1.76 26 18.7 3.90 0.33 4.99 26 14.80 8.9 16 . 101565 20 10.29 26 22.1 3.79 0.32 4.85 36 18.31 8.2 31 .092035 26 6.98 26 1 32.0 3.61 0.31 4.63 96 1 38.39 8.9 • .090193 —5 27 24.22 4-26 1 32.9 —3.58 0.31 4.58 + 26 1 29.33 +9.0 cxc OBSERVATIONS COMPARED WITH EPIIEMERIS. 11 Mts I. Computation of the Cape Equatorial Observations. Date. Wash. M.T. in dec. of day. Tab. «. Tab. 8. PariUIax in 8. Semid. Comp'd 0. Ad. a. 8. 1849.— Nov. 21 .307022 h. m. s. 6 21 36.23 o II I +25 17 20.0 a + 11.80 s. 0 50 a 7.53 + 25 17 31.8 + 18.2 .307032 21 36.23 17 20.0 11.80 0.50 7.53 17 31.8 20.0 22 .363335 20 41.89 20 57.7 11.81 0.50 7.57 21 9.5 19.2 26 .329572 Ib 49.89 27 43.6 12.07 0.51 7.66 27 55.7 19.9 25 .317405 17 48.46 31 7.2 12.15 0.51 7.69 31 19.4 20.0 .317405 17 48.46 31 7.2 12.15 0.51 7.69 31 19.4 19.9 26 .339021 16 41.23 34 36.8 12.15 0.52 7.73 34 48.9 18.6 27 .302096 15 34.59 37 52.8 12.27 0.52 7.77 38 5.1 20.7 28 .297948 14 25.96 41 13.6 13.33 0.52 7.80 41 26.0 20.1 29 .332101 13 4.11 44 39.6 12.25 0.52 7.83 44 51.8 18.8 30 .268942 11 41.81 47 43.4 12.35 0.5S 7.86 47 55.7 18.5 Dec. 1 .290225 10 26.76 51 0.3 12.49 0.53 7.89 51 12.7 19.8 2 .344352 8 57.43 54 18.7 12 26 0.53 7.92 54 31.0 18.7 3 .285150 7 35.13 25 57 11.5 12.58 0.53 7.94 25 57 24.1 21.2 4 .281160 6 5.50 26 0 9.4 12.62 0.53 7.96 26 0 22.0 20.1 5 .271798 4 33.94 3 0.6 12.65 0.53 7.98 3 13.2 20.4 6 .281303 2 58.33 5 48.8 12.69 0.53 7.99 6 1.5 20.5 7 .263713 6 1 23.22 8 25.7 12.71 0.53 8.00 838.5 18.8 8 .278387 3 59 43.08 11 0.5 19.73 0.53 8.02 11 13.2 20.0 9 .283523 58 2.17 13 25.9 12.72 0.53 8.02 13 38.6 19.3 .281321 58 3.39 13 25.6 12.73 0.53 8.02 13 38.3 19.4 10 .327447 56 15.79 15 48.3 12.30 0.54 8.03 16 0.6 18.6 11 .277968 54 37.74 17 49.9 12.73 0.54 8.03 18 2.6 19 4 14 .247448 49 26.24 23 17.5 12.77 0.53 8.02 23 30.3 17.9 15 .230645 47 42.16 34 47.7 12.75 0.53 8.01 35 0.4 17.9 16 .225483 45 56.74 26 9.9 12.73 0.53 8.00 26 22.6 16.1 .258560 45 53.23 26 12.5 12.70 0.53 8.00 26 25.2 17.5 17 .262608 44 7.00 2725.6 12.63 0.53 7.98 27 38.2 17.9 18 .250296 42 22.89 28 28.1 12.65 0.53 7.96 28 40.8 17.6 • .228819 39 56.40 30 5.5 12.62 0.53 7.92 30 18.7 19.0 21 .257289 S7 10.62 30 42.0 12.43 0.53 7.89 30 54.4 18.8 22 .241252 35 30.69 31 8.3 12.46 0.52 7.86 31 20.7 18.3 23 .207319 33 53.99 31 25.9 12.49 0.53 7.83 31 38.4 17.7 24 .247786 32 11 60 31 36.3 12.24 0.53 7.80 31 48.5 17.9 25 .186950 30 40.97 31 38.3 12.36 0.52 7.76 31 50.7 18.2 .307914 30 38.97 31 38.3 12.38 0.53 7.76 31 50.7 18.7 36 .169408 29 8.09 31 33.3 12.23 0.53 7.73 31 45.5 18.5 .202037 29 5.04 31 33.0 12.32 0.52 7.73 31 45.3 17.3 29 .189040 24 36.62 30 36.3 12.12 0.51 7.61 30 48.5 18.2 1850 Jan. 7 .176624 13 43.91 23 23.9 11.31 0.48 7.13 23 35.2 16.4 8 .183802 12 47.37 22 21.2 11.16 0.47 7.07 22 32.4 15.6 9 .149211 11 56.55 31 19.9 11.16 0.47 7.01 31 31.1 17.1 10 .150057 11 7.41 20 15.6 11.06 0.46 6.95 20 26.7 15.0 11 .159838 10 21.51 19 10.4 10.93 0.46 6.89 19 21.3 15.2 12 .163640 9 39.59 18 5.5 10.81 0.46 6.83 18 16.3 15.4 14 .149782 827.48 15 59.1 10.64 0.45 6.71 16 9.7 14.9 15 130468 7 57.34 14 57.9 10.57 0.44 6.64 15 8.5 15.5 16 .150427 7 29.66 13 55.7 10.43 0.44 6.58 14 6.4 14.6 17 .127705 5 7 6.73 +26 12 57.8 + 10.37 0.43 6.52 + 26 13 8.3 + 13.9 OBSERVATIONS COMPARED \VIT1I ErHtMERI.". CXC1 MARS I. Computation for Cape Meridian Observations. Date. Wash.M.T. in dec. of day. Tabular. Parallax infj Semid •s in O. Def. ill. Computed. A a. J .02 0 41 51 9 20.8 19 .550150 9 8.63 54 19.8 .27 8.62 0.40 6.06 .02 c. 54 28 4 20.7 .580303 9 8.26 54 26.3 .16 8.81 0.40 6.06 .02 c. 54 35.1 20.9 .597202 9 8.05 54 30.0 .09 8.88 0.40 6.C6 .02 c. 54 33.9 20.5 SO .558789 8 54.73 1958 6.1 .23 8.78 0.41 6.11 .03 s. 19 58 8.8 22.3 21 .552871 8 37.65 20 2 3.4 .24 8.83 0.41 6.15 .03 s. 20 2 6.1 21.2 22 .546569 8 17.19 6 14.4 .26 8.88 0.41 6.20 .03 s. 6 17.1 20.2 24 .581977 7 25.34 15 25.2 .18 9.17 0.42 6.29 .03 s. 15 28.1 21.1 25 .560700 6 54.49 20 18.2 .17 9.25 0.42 6.33 .03 s. 20 21.1 20.4 26 .589457 6 21.29 25 14.8 .29 9.13 0.43 6.38 .03 s. 25 17.6 22.1 .573891 6 19.69 25 2S 7 .10 9.40 0.43 6.38 .03 s. 25 31.7 22.4 27 .537696 5 43.33 j 30 36.1 .24 9.30 0.43 G.42 .03 s. 30 39.0 22.9 28 .5447C9 5 1.95 36 9.4 .20 9.44 0.43 6.46 .01 0. 36 18.8 21.1 29 .523539 4 18.46 41 44.7 .28 9.38 0.43 6.51 .01 c 41 54.1 20.4 30 .523620 3 30.71 47 38.3 .27 9.48 0.44 6.55 .01 0. 47 47.8 18.7 31 .516723 2 40.02 53 40.0 .28 9.51 0.44 6.59 .01 c. 20 53 49.6 19.4 1852.— Jan. 1 .530423 1 45.25 20 59 59.5 .21 9.72 0.44 6.63 .00 c. 21 0 9.2 19.5 2 .513620 9 0 48.33 21 6 16.8 .27 9.63 0.44 6.66 .00 c 6 26.5 22.0 4 .507212 8 53 44.18 19 27.2 .27 9.82 0.45 6.74 .00 c. 19 37.0 18.7 5 .512962 57 36.92 26 17.4 .23 9.95 0.45 6.77 .00 c. 26 37.3 31.8 6 .519886 56 26.54 33 14.8 .19 10.09 0.45 6.81 .00 c. 33 24.9 20.6 7 .509736 55 14.47 40 10.8 .23 10.10 0.46 6.84 .00 c. 40 20.9 22.8 8 .470027 54 1.91 46 59.0 .38 9.81 0.46 6.86 .00 c. 47 8.8 21.6 .520396 53 58.03 47 20.5 .15 10.25 0.46 6.87 .00 c. 47 30.8 21.1 9 .500697 52 41.23 21 54 21.4 .23 10.20 0.46 6.90 .00 0. 21 54 31.6 21.9 10 .500841 51 20.30 22 1 33.7 .21 10.28 0.45 6.92 .00 c. 22 1 44.0 20.6 11 .520036 49 55.96 8 56.6 .11 10.43 0.46 6.94 .00 c. 9 7.0 20.6 12 .478583 48 33.03 1554.4 .28 10.26 0.46 6.96 .00 c. 16 4.7 19.4 .521972 46 2;l. 24 16 13.3 .08 10.52 0.48 6.96 .00 c. 16 23.8 19.0 13 .503665 47 2 76 23 21.4 .15 10.51 0.47 6.98 .00 c. 23 31.9 19.7 14 .469949 45 33.83 30 30.9 .20 10.49 0.47 7.00 .00 0. 30 41.4 S1.7 16 .474718 42 29.34 44 49.4 .23 10.51 0.47 7.03 .00 c. 44 59.9 19.8 17 .464911 40 54.85 22 51 52.6 .26 10.49 0.47 7.04 .00 c. 92 52 3.1 20.1 20 .458899 36 1.37 23 12 41.3 + -31 10.61 0.47 7.06 .00 c. 23 12 52.0 20.0 .511188 35 56.17 13 2.6 — .02 10.81 0.47 7.07 .00 c. 13 13.5 19.9 21 .438255 34 23.49 19 16.5 + .32 10.47 0.47 7.07 .00 c. 19 27.0 21.8 22 .483709 32 38.32 26 9.3 .08 10.82 0.47 7.07 .00 c. 26 20.2 18.0 23 .476347 30 58.05 1 32 32.1 .10 10.82 0.47 7.06 .00 c. 32 42.9 19.9 24 .473829 29 17.07 38 47.0 .09 10.83 0.47 7.06 .00 c. 38 57.8 19.2 25 .440744 27 39.20 44 40.2 .23 10.66 0.47 7.05 .00 0. 44 50.9 17.0 27 .446278 24 17.06 23 56 18.1 .17 10.74 0.47 7.03 .00 c. 23 56 28.8 19.1 28 .456985 23 35.80 24 1 51.0 .10 10.80 0.47 7.01 .00 c. 24 2 1.8 17.1 29 .460799 20 56.49 7 8.4 .06 10.80 0.47 6.99 .00 0. 7 19.2 30 .463149 19 18.15 12 11.9 .03 10.79 0.46 6.97 .00 c. 12 22.7 16.1 31 .457368 17 41.80 16 59.2 .04 10.77 0.46 6.95 .00 c. 17 10.0 15.9 Feb. 1 .418346 16 9.47 2i 23.6 .21 10.59 0.46 6.93 .00 c. 21 34.2 16.1 3 .451873 14 32.84 25 53.0 + .03 10.71 0.46 6.91 .00 c. 26 3.7 15.5 3 .469467 12 59.27 30 3.1 — .08 10.66 0.46 6. 88 .00 0. 30 13.8 16.4 7 .416B67 7 14.84 43 48.3 + .11 10.46 0.45 6 75 .00 0. 43 58.8 16.3 8 .398496 5 54.78 46 37.8 .17 10.34 0.45 6.71 .00 c. 46 48.1 14.4 9 .393666 4 36.19 49 15.1 + .18 10.28 0.44 6.67 .01 0. 49 25.4 14.4 .462760 4 30.83 49 25.4 — .15 10.31 0.44 6.67 .01 0. 49 35.7 14.1 10 .411493 3 18.55 51 40.9 + .08 10.32 0 44 6.63 .01 c. 51 51.3 14.5 11 .402675 2 5.71 53 48.5 + .10 10.25 0.44 6.59 .01 0. 53 58.7 13.5 .453969 8 2 2.03 53 54.7 — .14 10.21 0.44 6.59 .01 c. 54 5.0 13.6 13 .395952 7 59 47.96 4-24 57 22.9 +0.10 +10.12 0.43 6.51 0.01 c. +24 57 33.0 + 13.5 OBSERVATIONS COMPARED WITH EPHEMERIS. Computation for Santiago Equatorial Observations — Continued. cxcv Date. Wash. M.T. in dec. of day. Tah. a. Tah. S. Parallax. Semidiameter in Def. ill. Obs'd part. Corap. O, M. a. 3. a. d. A. m. s. • a. II t. ti f. „ it 1853.— Feb. 13 .443044 7 59 44.79 +24 57 27.3 —0.12 + 10.10 0.43 6.51 0.01 0. +34 57 37.4 +13.1 M .4114918 58 42.74 24 58 50.4 + .04 10.09 0.43 6.46 .01 C. 34 59 0.5 14.4 \5 .3T0468 57 43.63 25 0 1.1 .18 9.90 0.43 6.42 .01 0. 25 0 11.0 14.0 16 .387076 56 44.08 1 2.1 .09 9.93 0.42 6.37 .01 C. 1 13.0 13.3 17 .385869 55 49.13 1 49.0 .08 9.86 0.42 6.33 .01 0. 1 58.9 12.7 19 .368313 54 9.90 2 44.5 .13 9.67 0.42 6.23 .01 C. 3 54.2 10.8 20 .36819:1 53 24.90 2 54.2 .11 9.61 0.41 6.19 .01 C. 3 3.8 10.9 21 .3739.'0 52 43.07 2 52.1 .07 9.57 0.41 6.14 .01 C. 3 1.7 10.8 22 ,ai6i32 53 5.60 2 38.8 .13 9.44 0.41 6.09 .01 C. 2 48.2 10.6 23 .350 0.11 0.13 20 25 17.24 20 30 39.11 21.9 18.4 30 S. 31 415881 104 20 41 5.98 + 6 36.13 0.30 20 47 42.41 20.8 31 8. 30.419198 99 20 57 18.14 — 3 31.13 0.17 20 53 46.84 20.2 1852.-Jan. 1 N. 29.422556 100 21 1 43.43 — 1 21.27 0.07 21 0 22.09 11.8 4 N. 26.432859 101 21 16 47.71 + 3 1.53 0/14 21 19 49.38 18.9 5 N. 25.436363 98 21 29 17.95 — 2 46.03 0.13 21 26 31.79 23.4 10 N. 20.454361 95 22 2 25.24 — 0 36.58 0.03 22 1 48 63 21.9 16 S. 14.476872 8. 22 46 31.42 — 1 38.02 0.08 22 44 53.32 20.5 17 N. 13.480715 89 22 51 33.75 + 0 40.49 0.03 22 52 14.27 19.3 23 N. 5.511753 79 23 45 33.88 — 0 32.67 0.03 2345 1.18 14.0 27 N. — 3.519513 77 2358 1.50 — 1 33.00 0.08 23 56 28.42 19.0 Feb. 1 8.' -f 1.461214 68 24 25 1.60 — 3 39.23 0.19 24 21 22.18 16.6 3 N. 2.457393 68 2425 1.63 + 0 56.41 0.05 24 25 58.09 13.9 4 N. 4.449833 64 24 28 59.75 + 4 51.93 0.23 24 33 51.91 15.3 8 S. 8.435012 62 24 46 56 93 — 0 24.02 0.02 24 46 32.69 14.8 9 N. 9.431360 62 24 46 56.98 + 2 26.06 0.14 24 49 23.18 14.7 18 S. 18.400148 57 25 0 18.36 + 1 53.10 0.11 25 2 11.57 15.4 19 N. 19.396866 57 25 0 18.42 + 2 30 34 0.14 25 2 48.90 11.9 20 8. 20.393612 57 25 0 18.48 + 2 27.83 0.14 25 2 46.45 11.4 21 Mir. 12 jr. V. 21.390395 41.334258 57 54 25 0 18.54 24 28 25.93 + 2 42.54 + 0 2.23 0.15 Ii. ml 25 3 1.23 24 28 28. 16 6.5 4.8 13 S. 42.331830 54 24 28 26.00 — 3 17.16 0.18 24 25 8.66 6.7 14 N. 43.3->94l4 55 24 18 57.55 + 3 6.83 0.17 24 22 4.55 6.8 15 8. + 44.327043 55 + 24 18 57.61 — 0 24 30 O.U2 + 24 18 33.39 + 7-0 MARS II. Computation for Washington Equatorial Observations. Parallax. Semid. Date. Wnsh. M.T. in dec. of day. Tab. a. Tab. d. Obs. part Comp'd 0. 49. a. . «. 0. A.m. s. • / /; t. /• *. n o 1 II n 1852.— Jan. 24 .424491 8 29 22.16 + 23 38 28.7 + 0.38 — 3.94 0.47 7.06 0. + 23 38 24.8 + 16.6 26 .416910 8 26 0.58 23 50 25.9 0.38 3.89 0.47 7.04 C. 23 50 22.0 30 .450868 8 19 19.35 24 12 8.3 0.16 3.31 0.46 8.97 0. 84 12 5.0 Feb. 2 .4(17064 8 14 36.96 24 25 41.8 0.31 3.52 0.46 6.91 0. 24 25 38.3 15.9 3 .409013 8 13 4.50 + 24 29 48.7 + 0.28 — 3.41 0.46 6.88 C. + 24 29 45.3 + 16.7 OBSERVATIONS COMPARED WITH EPHEMERIS. CXC1X MARS II. Computation for Greenwich Meridian Observations. Date. Wash. M.T. in dec. of day. Tabular. Parallax. Semid. Comp. O. J. 0 1 If // /; « / // a 1851 Dec. 22 .368637 9 821.2 + 20 5 2S.9 + 9.17 S. 0.02 + 20 5 36.08 •f 19.07 26 .350404 9 6 27.6 24 19.2 9.48 .03 24 38.69 18.74 29 .340817 9 4 26.8 40 41.3 9.70 .01 40 51.01 18 52 30 .337546 9 3 39.8 46 31.8 9.78 .01 46 41.59 19.00 1852.-Jan. 1 .331)888 9 1 56.0 20 58 44.1 9.92 01 20 58 54.02 19.49 2 .337503 9 0 59.3 21 5 4.7 9.99 .01 21 5 14.69 19.27 3 .324079 8 59 59.3 11 34.3 10.06 .01 11 44.36 17.97 5 .317128 8 57 50.2 24 57.1 10.19 .01 25 7.29 18.21 9 .30-2823 8 52 56.9 21 52 55.9 10.44 .00 21 53 6.34 17.62 10 .299167 8 51 38.8 22 0 6.2 10.49 .00 22 0 16.69 17.28 19 .291772 8 48 49.2 14 32.8 10.59 .00 14 43.39 17.76 13 .283034 8 47 21.9 21 47.4 10.64 .00 21 58.04 18.34 14 .884271 8 45 5-2.5 29 1.5 10.68 .00 29 12.18 18.31 15 .280486 8 44 21.2 36 14.1 10.72 .00 36 24.82 17.36 16 .276682 8 43 48.1 22 43 24.3 10.76 .00 22 43 35. 06 17.52 19 .265161 8 37 59.6 23 4 3D.1 10.85 .00 23 4 40.95 17.00 20 .261593 8 36 21.0 11 20.6 10.87 .00 11 31.47 16.47 21 .257415 8 34 41.6 18 3.9 10.89 .00 18 14.79 17.67 22 .25:1529 8 33 1.5 24 39.1 10.90 .00 24 50.00 16.18 23 .249639 8 31 21.0 31 5.5 10.91 .01 31 16.41 15.74 24 .245743 8 29 40.2 37 2-2.1 10.91 .01 37 33.01 15.13 26 .237958 8 26 18.7 49 23.2 10.91 .01 49 34.12 15.51 27 .234070 8 34 38.4 23 55 6.4 10.90 .01 23 55 17.31 14.37 29 .226314 821 19.7 94 0 55.4 • 10.88 .01 24 6 6.29 14.67 Feb. 2 .210958 8 14 55.4 24 51.5 10.78 .02 25 2.29 13.18 3 .2J7163 8 13 23.0 29 0.1 10.74 .02 29 10.85 14.11 4 .203386 8 11 52.5 32 54.0 10.71 .02 33 4.72 13.73 5 .199631 8 10 24.0 35 33.2 10.66 .02 36 43.87 13.03 6 .195906 8 8 57.6 39 57.8 10.62 .02 40 8.43 13.19 7 .192204 8 7 33.5 43 7.5 10.57 .02 43 18.08 12.83 9 .184884 8 4 52.5 48 43.1 10.47 .03 48 53.58 11.37 10 .181271 8 33S.9 51 9.O 10.41 .03 51 19.43 11.16 11 .177687 8 2 22.0 53 20.7 10.35 .03 S3 31.06 10.83 12 .174138 8 1 11.0 55 18.0 10.29 .03 55 28.30 11.73 13 .170620 8 0 3.9 57 1.3 10.23 .03 57 11.54 12.60 14 .167138 7 58 57.8 24 58 30.9 10.16 .03 24 58 41.07 12.23 16 .160284 7 56 57.1 25 0 49.6 10.03 .03 25 0 59.64 11.01 17 .156911 7 56 1.5 1 39.3 9.95 .03 1 49.27 10.04 18 .153578 7 55 9.2 2 16.1 9.88 .03 2 26.00 10.18 19 .150281 75430.3 2 40.7 9.81 .03 2 50.53 9.91 20 .147035 7 53 34.6 2 53.1 9.73 .03 3 2.85 8.53 21 .143807 7 52 52.4 253.7 9.66 .03 3 3.38 11.12 33 .137488 7 51 38.2 2 20.5 9.50 .03 3 30.02 8.47 24 .134390 7 51 6.3 1 47.2 9.42 .03 1 56.64 7.67 25 .131330 7 50 37.7 as i 3.5 9.34 .03 25 1 12.85 7.48 28 .122386 7 49 32.6 + 84 57 52.3 + 9.10 8. 0.03 + 24 58 1.42 -f 6.96 OBSERVATIONS COMPARED WITH EPIiEMEKlS. CC1 MARS II. Computation for Kremsmiinster Meridian Observations. Dale. Wash. M.T. in dec. of day. Tabular. Parallax. Def. ill. Comp'd d. Ad. a. 8. h. m. s. ° / // / „ » // / a 1852 — Jan. 20 .273314 8 36 19.84 4. 23 11 25.6 •f 5.41 0.00 + 23 11 31.0 + 16.0 34 .857763 8 29 38.95 23 37 28.7 5.32 0.01 23 37 32.0 17.5 Feb. 8 .200553 8 6 10.72 24 46 4.8 4.84 0.03 24 46 9.7 15.3 9 .196907 8 4 51.53 24 48 45.1 4.80 0.03 24 48 49.9 15.2 10 .193291 8 3 34.96 24 51 10.9 4.76 0.03 24 51 15.7 19.3 24 .146415 751 5.85 25 1 47.0 4 27 0.03 25 1 51.3 12.7 25 .143358 7 50 37.38 25 1 3.2 4.24 0.03 25 1 7.4 9.2 26 .140345 7 59 12.33 25 0 9.1 4.20 0.03 25 0 13.3 13.3 Mar. „ .114883 7 48 56.04 24 45 6.7 3.93 0.03 24 45 10.7 7.7 7 .112-239 7 49 3.43 24 43 44.6 3.90 0.03 24 42 48.5 7.4 8 .109625 7 49 13.80 24 40 15.0 3.87 0.03 24 40 18.9 11.5 14 .094659 7 51 16.54 24 22 44.7 3.71 0.03 24 23 48.4 4.1 16 .089923 7 52 19.33 •f 24 15 59.7 •f 3.66 0.03 + 34 16 3.4 + 7.4 Z 2° ecu OBSERVATIONS COMPARED WITH EPBEMERIS. III. FIRST CONJUNCTION OF VENUS. VESfTJS I. Computation for Santiago Equatorial Observations. Date. Wash. M.T. in dec. of day. Tab. 6t. Tab. (?. Parallax. Scmidiametcr. Ob'd part Comp'd d. Ad. a. 8. «. r 3. A. m. a. e t. 11 s. n « / II n 1850 Oct. 19 .338449 16 40 26.70 — 26 32 40.3 — 0.94 + 7.03 1.14 15.23 N. — 26 32 18.0 + 3.9 20 .326075 16 44 13.27 26 41 56.1 0.94 6.67 1.15 15.44 N. 26 41 34.0 3.9 • .326958 16 51 45.27 36 59 2.9 0.97 6.87 1.19 15.86 N. 26 58 40.2 1.9 23 .323271 16 55 26.53 27 6 44.6 0.98 6.82 1.21 16.08 N. 27 6 21.7 4.0 24 .311141 16 59 3.18 27 13 50.1 0 98 6.45 1.22 16.30 N. 37 13 27.3 3.6 • .329782 17 2 42.57 27 20 35.1 1.02 7.26 1.24 16.54 N. 27 20 11.3 1.5 26 .313050 17 6 13.25 S7 26 33.6 1.02 6.70 1.26 16.78 N. 27 26 10.1 + 4.0 29 .290132 17 16 27.91 27 41 27.4 1.02 6.08 1.32 17.52 N. 27 41 3.8 — 1.3 .350424 17 16 40.02 27 41 42.5 1.09 8.59 1.33 17.53 N. 27 41 16.4 1.0 30 .326339 17 19 54.06 27 45 31.5 1.10 7.70 1.34 17.79 N. 37 45 6.0 — 0.5 31 .3285-16 17 23 8.92 27 48 55.1 1.12 7.92 1.36 18.06 N. 27 48 29.1 + 1.2 Nov. 1 .313547 17 26 16.87 27 51 44.4 1.12 7.40 1.39 18.33 N. 27 51 18.7 1.0 2 .353315 17 29 24.60 27 54 6.4 1.15 7.97 1.41 18.61 N. 27 53 39.8 1.0 1 .300149 17 a? 17.83 27 57 13.6 1.15 7.31 1.45 19.19 N. 27 56 47.3 1.4 6 .311707 17 40 56.03 27 58 22.1 1.21 8.06 1.50 19.81 N. 27 57 54.2 + 0.9 7 .310076 17 43 35.27 27 58 11.4 1.23 8.16 1.52 20.13 N. 37 57 43.1 — 1.2 8 .306648 17 46 8.19 27 57 31.4 1.25 8.31 1.55 30.45 N. 27 57 2.6 — 0.5 10 .280189 17 50 51.96 27 54 47.0 1.23 7.24 1.60 21.13 N. 27 54 18.7 + 0.1 11 .315959 17 53 10.18 27 52 36.0 1.33 9.34 1.62 21.48 N. 27 53 5.3 + 0.4 13 .314107 17 57 14.48 27 46 57.5 1.37 9.15 1,67 22.20 N. 27 46 26.1 — 0.3 14 .315130 17 59 5.17 27 43 25.9 1.40 9.91 1.70 22.57 N. 27 42 53.4 + 1-2 15 .281037 18 0 44.20 27 39 35.5 1.36 8.32 1.73 33.94 N. 27 39 4.2 — O.I .312755 18 0 47.32 27 39 27.5 1.42 10.04 1.73 22.95 N. 27 38 54.5 + 0.2 16 .307103 18 2 20.74 27 35 2.4 1.44 9.99 1.76 23.33 N. 27 34 29.1 + 1.4 17 .292045 18 3 44.74 27 30 13.0 1.44 9.43 1.78 23.72 N. 37 29 39.8 — 0.7 18 .309470 18 5 12.30 27 24 45.9 1.49 10.70 1.81 24.13 N. 27 24 11.1 + 1-2 31 .291491 18 7 52.89 27 6 3.1 1.54 10.58 1.90 25.34 N. 27 5 26.2 1.5 24 .303418 18 9 14.34 26 42 57.9 1.64 13.36 1.99 26.60 N. 26 42 18.9 + 0.7 25 .308236 18 920.28 26 34 18.8 1.66 13.05 2.03 27.03 N. 26 33 38.7 — 0.4 26 .334374 18 9 15.14 26 24 58.7 1.66 15.11 3.04 27.46 N. 36 24 16.1 + 0.5 28 .304189 18 8 33.25 26 537.1 1.73 14.02 2.10 28.28 N. 26 4 54.8 — 1.2 29 .31S331 18 7 55.47 25 54 58.1 1.75 14.98 2.13 28.69 N. 25 54 14.4 + 3.4 30 .306782 18 7 7.43 25 4358.1 1.77 15.06 2.15 29.09 N. 25 43 13.9 — 0.7 Dec. 3 1851.-Jan. 6 .302140 .705480 18 3 39.41 17 4 58.76 25 7 50.0 17 38 19.2 — 1.83 + 1.52 16.10 12.99 3.33 1.85 30.24 26.37 S. S. 25 8 4.1 17 38 32.6 + 0.7 6.8 7 .705508 17 5 19.04 17 34 59.7 1.49 12.68 1.82 25.95 S. 17 35 13.0 + 6.6 8 .665513 17 5 47.43 17 32 28.5 1.46 12.33 1.79 25.54 s. 17 32 41.7 — 1.7 9 10 .662595 .657680 17 6 25. 9t 17 7 13.32 17 30 31.5 17 29 13.7 1.44 1.42 12.16 12.07 1.76 1.73 35.13 34.72 s. s. 17 30 -14.5 17 29 26.3 2.3 2.8 11 .642953 17 8 8.85 17 28 33.0 1.40 12.35 1.70 24.31 s. 17 28 45.0 4.3 12 .657832 17 9 14.79 17 28 26.7 1.37 11.53 1.67 23.91 s. 17 28 39.1 4.5 14 15 16 17 .662^96 .658800 .657134 .657131 17 11 50.21 17 13 19.37 17 14 56.36 17 16 40.95 17 29 51.6 17 31 17.7 17 33 10.4 17 35 S7.2 1.31 1.29 1.27 1.25 10.82 10.72 10.55 10 32 1.62 '1.59 1.57 1.54 23.12 22.74 22.37 22.00 S. s. 8. S. 17 30 3.9 17 31 29.8 17 33 22.2 17 35 38.9 1.7 5.5 3.1 2.2 18 20 34 26 27 28 .649177 .64*941 .650433 .650814 .651362 .652529 17 18 31.82 17 22 35.99 17 32 0.99 17 37 18.12 17 40 4.74 17 43 56.47 17 38 4.7 17 44 19.2 17 59 37.4 18 8 8.6 18 12 30.5 18 16 54.3 1.24 1.19 1.11 1.08 1.06 1.04 10.36 9.S4 9.10 8.74 8.56 8.38 1.53 1.47 1.38 1.34 1.32 1.30 21.64 20.93 19.63 19.01 18 72 18.44 S. S. 8. S. 8. 8. 17 38 16.0 17 44 30.2 17 59 48.0 18 8 18.9 18 12 40.7 18 17 4.4 4.5 3.3 4.5 3.6 4.7 3.7 Feb. S 6 .651360 .659449 .66-2710 18 8 28.42 18 8 30.10 18 12 0.78 18 49 50.3 18 49 52.0 18 53 22.4 0.92 0.91 0.89 7.30 7.08 6QQ 1.15 1.15 16.38 16.38 S. N. 18 49 59.4 18 49 38.5 3.3 5.3 7 10 . .655148 .658692 18 15 30.89 18 26 28.67 _ 18 56 35.0 — 19 4 52. 3 i 0.89 + 0.85 .00 6.97 + 6.57 1.14 1.12 1.08 0. 0. c. 18 53 15.6 18 56 38.0 — 19 4 45.7 4.7 2.3 — 5.0 OBSERVATIONS COMPARED WITH EPHEMEEIS. CC111 VENUS I. Computation for Santiago Meridian Observations. Date. Wash. M.T. in dec. of day. Tabular. Parallax. Semi-diameter. Comp'd O. 48. a. 8. a. d. A. m. f. 9 1 II // s. a « / n II 1850.— Oct. 19 .008603 16 39 30.96 — 26 30 20.4 + 1.77 1.13 15.18 —26 30 3.5 + 13.1 20 .098524 16 43 21.26 26 39 50.9 1.75 1.15 15.39 26 39 33.8 12.2 21 .098421 16 47 8.90 26 48 48.2 1.73 1.16 15.59 26 48 30.9 6.0 22 .098294 16 50 54.12 26 57 12.3 1.72 1.18 15.81 26 56 54.8 5.4 23 .093131 16 54 36.76 27 5 3.2 1.71 1.20 16.03 27 4 45.5 7.0 24 .097921 16 58 17 66 27 12 21.0 1.70 1.22 16.25 27 12 3.0 8.5 25 .097713 17 1 53.64 27 19 5.8 I 69 1.23 16.48 27 18 47.6 6.4 26 .097453 17 5 27.54 27 25 17.7 1.68 1.25 16.72 27 24 59.3 (22.1) 27 .097151 17 8 58.17 27 30 56.9 1.68 1.27 16.96 27 30 38.3 5.7 38 .096810 17 12 25.36 27 36 3.6 1.68 1.29 17.21 27 35 44.7 7.0 30 .096008 17 19 8.61 27 44 40.2 1.68 1.33 17.73 27 44 50.8 3.2 31 .095536 17 2-2 24.25 27 48 10.5 1.69 1.35 18.00 27 47 50.9 5.5 Nov. 1 .095015 17 35 35.61 27 51 9.5 1.70 1.38 18.27 27 50 49.5 8.1 2 .094440 17 28 42.49 27 53 37.0 1.71 1.40 18.55 27 53 16.7 3.7 4 .093128 17 31 41.84 27 56 59.6 1.75 1.44 19.13 37 56 38.7 (44.5) 5 .092383 17 37 .'13.70 27 57 55.2 .77 1.46 19.43 27 57 34.0 2.6 7 .090697 17 43 0.80 27 58 16.3 .83 1.51 20.06 27 57 54.4 5.8 8 .089752 17 45 35.41 27 57 42.6' .86 1.53 20.38 27 57 20.3 6.3 10 .087637 17 50 25.43 27 55 8.0 .93 1.59 21.05 27 54 45.0 4.8 11 .086462 17 52 40.22 27 53 7.7 .98 1.61 21.40 27 52 44.3 6.3 13 .083861 17 56 47.89 27 47 42.2 3.08 1.66 22.11 27 47 18.0 2.0 14 .082428 17 58 40.15 27 44 17.6 2.14 1.69 22.48 27 43 53.0 3.1 15 .080901 18 0 24.32 27 40 25.4 2.20 1.72 22.86 27 40 0.3 7.6 16 .079275 18 2 0.09 27 36 5.6 2.27 1.75 23.24 27 35 40.1 5.7 17 .077551 18 3 27.19 27 31 18.3 2.34 1.77 23.63 27 30 53.3 + 2.8 18 .075722 18 4 45.33 27 26 3.6 2.42 1.80 24.03 27 25 37. 1 — 0.6 19 .073787 18 5 54.22 27 20 21.5 3.50 1.83 24.43 37 19 54.6 + 4.2 20 .071743 18 6 53.60 27 14 12.0 3.58 1.86 24.84 27 13 44.6 3.3 21 .069565 18 7 43.21 27 7 35.1 2.67 1.89 25.25 27 7 7.2 4.6 23 .064920 18 8 52.27 26 52 58.3 3.87 1.95 26.08 26 £3 29.5 1.4 36 .056229 18 9 17.66 26 27 33.6 3.21 2.03 27.34 26 27 3,1 2.6 27 .054144 18 9 4.73 26 18 7.5 3.33 2.06 27.72 36 17 36.4 2.0 28 .051136 18 8 41.00 26 8 12.7 • 3.46 2.09 28.18 26 7 41.1 5.0 30 .044068 18 721.16 25 46 55.4 3.73 3.14 28.99 35 46 22.7 3.0 Dec. 2 .037882 18 5 18.58 25 23 38.2 4.02 2.19 29.77 35 23 4.4 3.1 4 .030533 18 2 34.98 24 58 22.0 4.35 2.24 30.50 24 57 47.1 4.3 5 .026693 18 0 58.61 24 44 59.5 4.51 2.26 30.84 24 44 24.1 3.9 8 .014558 17 55 16.90 24 2 3.1 5.03 3.32 31.74 24 1 26.3 3.1 10 .006039 175051.83 23 31 17.5 5.38 2.34 32.19 23 30 39.9 5.7 (12) .997259 17 46 4.a5 22 59 8.6 5.74 2.36 32.53 32 58 30.3 6.5 (13) .992793 17 43 34.61 22 42 39.8 5.91 2.36 33.65 22 43 6.6 3.3 21 .955584 17 21 17.61 20 14 6.6 7.16 2.28 32.10 20 14 31.6 5.6 22 .948570 17 19 8.96 1959 1.0 7.24 3.36 31.87 19 59 35.6 1.6 29 .921792 17 8 0.45 18 31 3.6 7.44 2.08 29.59 18 31 25.7 3.7 31 .915076 17 6 15.32 18 12 50.0 7.39 3.02 28.79 18 13 11.4 5.1 1851.— Jan. 5 .900464 17 4 49.43 17 41 32.2 7.09 .87 36.71 17 41 51.8 0.0 6 .897880 17 5 1.92 17 37 37.4 7.00 84 26.28 17 37 56.7 0.0 7 .895402 17 5 23.97 17 34 96.7 6.91 .81 25.86 17 34 45.6 0.4 8 .893033 17 5 55.41 17 31 58.3 6.82 .78 25.44 17 32 16.9 0.0 9 .890770 17 6 36.02 17 30 10.3 6.72 .75 25.04 17 30 28.6 1.2 10 .888610 17 7 25.57 1729 1.0 6.62 .72 34.63 17 29 19.0 0.8 H .886552 17 8 23.88 17 28 28.3 6.51 .69 24.22 17 28 46.0 + 3.4 12 .884593 17 9 30.71 17 28 30.0 6.40 .66 23.82 17 28 47.4 — 0.9 ' 13 .882731 17 10 45.85 1729 4.0 6.29 .63 23.43 17 29 21.1 + 0.4 14 .880960 17 12 9.07 — 17 3(1 8.1 + 6.18 .61 33.04 —17 30 35.0 + 0.7 CC1V OBSERVATIONS COMPARED WITH EPIIEMEKIS. VENUS I. Computation for Santiago Meridian Observations — Continued. Date. Wash. M.T. in dec. of day. Tabular. Parallax. Semi-diameter. Comp'd d. J3. a. 3. «. d. d. A. m. s. 0 / // // t. ii » / // „ 1651 — Jan. 15 .879281 17 13 40.14 — 17 31 40.4 -j- 6.07 1.58 22.65 — 17 31 57.0 •f 0.3 16 .877666 17 15 18.73 17 33 38.6 5.S6 1.56 22.28 17 33 54.9 0.7 17 .876179 17 17 4.83 17 36 0.2 5.84 1.53 21.91 17 36 16.3 -f 0.6 • .873139 17 23 4.89 17 45 5.2 5.51 1.46 20.85 17 45 20.5 — 2.1 21 .870948 17 25 18.13 17 48 39.5 5.40 1.43 20.52 17 48 54.6 1.0 23 .869825 17 27 37.65 17 52 26.7 5.29 1.41 20.19 17 52 41.6 0.1 23 .868774 17 30 3.09 17 56 24.8 5.19 1.39 19.87 17 56 39.5 2.7 34 .867789 17 33 34.39 18 031.8 5.08 1.37 19.56 18 0 46.3 1.9 35 .866870 17 35 11.26 18 4 45.8 4.98 1.35 19.25 18 5 0.1 3.3 36 .866011 17 37 53.54 18 9 4.7 4.88 1.33 18.95 18 9 18.8 0 6 27 .865213 17 40 41.00 18 13 26.8 4.78 1.31 18.66 18 13 40.7 1.7 28 .864472 17 43 33.46 18 17 50.3 4.69 1.29 18.38 18 18 4.0 — 0.6 Fell. 3 .861125 18 2 23.07 18 43 8.6 4.17 1.18 16.80 18 43 21.2 + i-o 5 .860384 18 9 11.84 18 50 31.9 4.03 1.15 16.33 18 50 47.2 + i.o 6 .860073 18 12 41.61 18 54 0,7 3.95 1.13 16 10 18 54 12.8 — 0.4 7 .859807 18 16 14.80 18 57 13.2 3.88 1.12 15.88 18 57 25.2 + 1-9 10 .859218 18 27 13.57 — 19 5 20.2 + 3.69 1.07 15.46 — 19 5 32.0 + 3.6 VESftJS I. Computation for Washington Equatorial observations. Parallax. Semi-diameter. 1 Date. Wash. M.T. in dec. of day. Tab. a. Tab. d. Obs. Comp'd d. d d. a. 0. a. d. piirt. ft. m, a. ° i n s. S, 1850.— Oct. 19 .261184 16 40 8.67 — 36 31 55.5 — 0.69 —11.63 1.01 15.21 0. — 26 32 7.1 31 .363813 16 47 4B.32 36 50 13.9 0.70 13.04 1.114 15.63 c. 26 50 25.9 j— 1.5 32 .348186 16 51 27.67 36 58 24.9 0.67 13.47 1.C6 15.84 0. 26 58 37.4 j — 3.8 + 3.7 28 .248522 17 13 56.49 37 36 47.3 0.75 13.56 1.15 17.25 c. 27 37 0.9 4.4 Nov. 1 .341499 17 26 3.29 37 SI 33.0 0.77 14.56 1.22 18.31 c. 27 51 47.6 4.0 2 .338227 17 29 7.99 37 53 55.7 0.77 14.87 1.34 18.59 c. 27 54 10.6 3.7 9 .234576 17 48 24.84 37 56 38.1 0.87 16.54 1.38 20.74 c. 27 56 44.7 3.1 10 .236150 17 50 45.92 27 54 52.1 0.90 16.71 1.41 31.10 c. 27 55 8.9 2.5 13 .220761 .231253 17 50 43.80 17 57 4.96 37 54 53.6 27 47 13.7 0.81 0.94 17.33 17.62 1.41 1.48 31.10 23.17 c. c. 37 55 10.8 27 47 31.3 0.3 3.6 14 21 1851.— Jan. 13 15 34 .225873 .218820 .777047 .759202 .753286 17 58 56.63 18 7 49.78 17 10 37.51 17 13 28 78 17 32 16.76 27 43 45.9 37 6 33.4 17 38 59.9 17 31 37.9 — 18 0 3.3 0.93 — 1.08 + 1.13 0.93 + 0.78 18.02 19.94 17.70 16.78 —14.65 1.50 1.69 1.56 1.51 1.31 33.54 25.31 23.47 22.70 19.60 0. c\ 0. c. 0. 37 44 3.9 37 6 53.3 17 39 17.6 17 31 44.7 — 18 0 17.8 + 1.8 — 0.1 8.2 4.2 — 3.9 OBSERVATIONS COMPABED WITH EPHEMEEIS. CCV VENUS I. Computation for Greenwich Meridian Observations. Date. Wash.M.T. in dec. ot' day. Tubular. Parallax. Comp'd S. J8. «. 3. ti. m. s. • ' ii « / */ a 1850.— (Oct. 15) .902636 16 23 5.15 — 25 44 25.6 — 13.83 — 25 44 39.43 + 3.63 (16) .902303 16 27 3.02 25 56 15.0 14.02 25 56 29.02 4.38 (SI) .902403 16 46 24.46 26 47 5.5 15.03 26 47 20.53 ; 8.70 (Nov. 11) .890659 17 52 14.35 27 53 33.5 20.69 27 53 54.19 3.81 (28) .855710 18 8 46.50 26 10 11.7 27.08 26 10 38.78 7.12 (99) .852608 18 8 14.07 25 59 53.2 27.46 26 0 20.66 8.20 Dec. (6) .827501 17 59 34.46 24 33 53.5 29.78 24 34 23.28 6.81 97 .733575 17 10 41.75 18 54 48.3 28.25 18 55 16.55 10.10 1 1.— Jan. 8 .697416 17 5 48.51 17 32 24.1 33.51 17 32 47.61 0.44 17 .680398 17 16 43.47 17 35 30.6 20.25 17 35 50.85 + 1.47 22 .673973 17 27 9.77 17 51 41.2 18.69 17 51 59. S9 — 0.55 29 .667855 17 45 55.58 18 31 31.8 16.80 18 21 38.60 0.70 Feb. 2 .665589 17 58 25.84 18 38 22.9 15.86 18 38 38.76 2.36 3 .665146 18 1 43.80 18 42 22.6 15.65 18 42 38.25 2.52 5 .664386 18 8 31.12 18 49 53.1 15.21 18 50 8.31 2.63 7 .663:69 18 15 32.74 18 56 36.5 14.80 18 56 51.30 : 1.40 16 .662815 18 49 40.37 — 19 13 10.6 — 13.16 — 19 13 23.76 — 4.62 VESTUS i. Computation for Altona Meridian Observations. Tubular. Wash. M T. Date. in dec. of Parallai. \ Comp'd §. 48. day. a. d. A. m. *. « / it II °lll a 1851.— Jan. 27 .611376 17 40 3.06 — 18 12 28.0 + 17.54 _ 18 12 10.5 — 0.1 31 .639051 17 51 56.90 — 18 29 55.0 + 16.53 — 18 29 38.5 — 2.4 CCV1 OBSEKVATIONS COMPARED WITH EPHEMEK1S. IV. SECOND CONJUNCTION OF VENUS. VENUS II. Computation for Santiago Equatorial Observations. Date. Wash. M.T. in dec. of day. Tab. «. Tab. 0. Par.illax. Sernidiameter Obs'd part. Comp'd 0. 48. a. s. h. m. t. * 1 II 8. ft // • / // it 1852.— May 30 .257754 7 43 10.58 +24 5 19.4 —0.73 +10.82 0. +24 5 30.2 —4.5 June 2 .247087 7 52 36.54 23 29 58.7 0.73 11.48 C. 23 30 10.2 + 1.5 3 .246930 7 55 36.45 S3 17 36.9 0.74 11.62 C. 23 17 48.5 12 .245048 8 18 SI. 12 21 17 36.4 0.86 12.94 C. 21 17 49.3 —2.6 15 .244243 8 24 20.30 20 35 35.2 0.92 13.41 C. 20 35 48.6 —1.4 M .243103 8 33 35.14 1858 8.9 1.07 14.48 C. 18 58 23.4 +o.a 23 .246384 8 34 21.97 18 44 32.7 1.12 14.46 C. 18 44 47. S -1.6 24 .245630 8 34 59.60 18 31 13.0 1.14 14.69 0. 18 31 27.7 0.5 July 6 .236984 8 30 12.03 16 11 39.7 1.45 16. 30 27.07 N. 16 1223.1 2.0 9 .231435 8 25 25.78 15 45 2.7 —1.58 16.62 28.03 N. 15 45 47.3 —1.3 30 .745462 7 34 31.34 14 36 25.3 +1.52 16.97 C. 14 36 42.3 +6.7 31 .745779 7 32 45.68 14 37 58.2 1.49 16.96 C. 14 38 15.2 4.6 Aug. 4 .733518 7 27 16.46 14 46 57.9 1.41 16.89 C. 14 47 14.3 8.7 8 .718202 7 24 24.30 14 59 20.0 1.35 15.37 0. 14 5» 35.4 5.7 12 .724735 7 24 10.81 15 13 35.5 1.21 15.04 C. 15 13 50.5 8.2 13 .725259 7 24 31.55 15 17 15.2 1.18 14.91 0. 15 17 30.1 7.7 16 .718912 7 26 28.08 15 28 3.9 1.12 14.27 C. 15 28 18.2 5.1 21 .692311 7 32 28.40 15 44 13.5 1.10 12.77 C. 15 44 26.3 5.3 .714374 7 32 30.41 15 44 17.3 1.02 13.35 0. 15 44 30.6 5.4 22 .707331 7 34 5.31 15 47 3.4 1.03 13.01 0. 15 47 16.4 6.7 23 .714628 7 35 48.70 15 49 39.6 0.98 13.03 0. 15 49 52.7. 6.6 28 .716423 7 46 1.79 15 58 56.2 0.87 12.27 C. 15 59 8.5 3.1 Sept. 1 .710386 7 55 56.66 16 0 58.9 0.83 1U53 0. 16 1 10.4 5.7 2 .704430 7 &8 37.51 16 0 37.8 0.84 11.25 0. 16 0 49.0 7.2 3 .705168 8 1 24.20 15 59 54.2 0.82 11.12 C. 16 0 5.3 12.3 6 .701033 8 10 9.70 15 5522.9 0.79 10.62 0. 15 55 33.6 6.5 7 .696216 8 13 12.50 15 53 4.2 0.79 10.39 0. 15 53 14.6 7.8 8 .698248 8 16 20 35 +15 50 19. a +0.77 + 10.29 C. +15 50 29.5 +2.6 OBSERVATIONS COMPARED WITH EPIII'MERIS. CCVH VENUS II. Computation for Santiago Meridian Observations. Date. Wash. M.T. in dec. of day. Tabular. Parallax. . Semi- diameter. Comp'd 0. A8. a. d. a. d. A. m. .. ' i 11 // 9. lf o ti 1852— May 30 .113124 7 42 41.87 +24 0 57.7 + 12.80 1.12 15.37 +24 6 55. 1 — 4.6 31 .112041 7 45 56.47 23 55 28.5 12.95 1.14 15.59 23 55 25.9 1.9 June 2 .111511 7 52 11.79 23 31 38.1 13.27 1.16 16.04 2332 7.5 . 4.8 3 .110860 7 55 12 25 23 19 18.7 13.43 1.18 16.28 23 19 15.8 5 8 12 .103235 8 18 13.95 21 19 35.7 15.03 1.33 18.65 21 20 9.4 2.7 13 .100933 8 20 17.51 21 5 39.5 15.22 1.35 18.95 21 5 35.8 3.2 22 .085462 8 33 27.00 19 0 17.7 17.12 1.54 21. 90 19 0 56.7 1.1 23 .083287 8 34 7.56 18 46 46.1 17.34 1.57 22.26 18 46 41.2 4.7 24 .081007 8 34 54.00 18 33 24.3 17.57 1.59 22.62 18 34 4.5 — 1.8 28 .070838 8 35 59.16 17 42 1.1 18.50 1.68 24.10 17 42 43.7 + 0.5 29 .068019 8 35 51.82 17 29 47.8 18.74 1.71 24.47 17 29 42.1 — 6.0 30 .065091 8 35 34.78 17 17 52.1 18.96 1.73 24.85 17 18 36.0 l.S July 1 .062049 8 35 7.98 17 6 15.0 19.19 1.76 25.21 17 6 59.4 — 0.7 5 .048760 B 31 42.92 16 23 17.0 20.08 1.85 26.67 16 24 3.7 + 1.4 6 .045159 8 30 27.60 16 13 29.9 20.30 1.87 27.00 18 14 17.2 3.2 7 .041453 8 29 3.01 16 4 7.7 20.50 1.90 27.34 16 4 55.5 2.7 8 .Oil 642 8 27 29.39 15 55 11.1 20.69 1.92 27.66 15 55 59.4 6.6 9 .033729 8 25 47.09 15 46 40.9 20.88 1.94 37.97 15 47 29.7 7.9 10 .029710 8 23 56.50 15 38 37.5 21.04 1.96 38.26 15 39 26.8 2.7 13 .017183 8 17 39.74 15 17 14.1 21.49 9.00 29.00 15 18 4.6 2.5 18 .993613 8 5 21.09 14 51 8.7 21.91 2.05 29.77 14 52 0.4 5.3 26 .954580 7 42 23.71 14 33 41.3 21.45 2.02 20.28 14 34 32.0 5.7 29 .941985 7 36 2.33 14 35 24.8 20.98 1.97 28.62 14 36 14.4 8.5 30 .937965 7 34 10.34 14 36 41.7 20.79 1.95 28.37 14 37 30.9 11.2 ' 31 .934040 7 22 26.81 14 38 17.8 20.59 1.93 28.08 14 39 6.5 4.3 Aug. 4 .919400 7 29 4.87 14 47 28.7 19.72 1.85 26.82 14 48 15.3 7.3 5 .916023 7 26 8.68 14 50 21.1 19.48 1.82 36.48 14 51 7.1 6.1 6 .912761 7 25 22.47 14 53 24.8 19.24. 1.80 26.13 14 54 10.0 7.4 7 .909611 7 24 46.29 14 56 37.5 18 99 1.78 25.77 14 57 22.3 9.5 8 .906579 7 24 20.12 14 59 58.5 18.74 1.75 25.41 15 0 42.6 7.6 10 .900855 7 23 57.50 15 6 58.5 18.24 1.70 34.68 15 7 41.4 9.5 12 .895583 7 24 13.69 15 14 13.0 17.73 1.65 23.96 15 14 54.7 7.5 13 .893109 7 24 35.95 15 17 52.0 17.49 1.63 23.60 15 18 33.1 5.8 14 .890740 7 25 7.39 15 21 30.4 17.24 1.60 23.24 15 22 10.9 6.5 16 .886313 7 26 36.92 15 28 39.1 16.75 1.66 22.54 15 39 18.4 8.7 31 .876917 7 32 45.44 15 44 45.3 15.58 1.44 20.85 15 4521.6 6.5 22 .875300 7 34 22.07 15 47 30.3 15.33 1.42 20.53 15 48 6.2 5.8 23 .873760 7 36 5.78 15 50 3.1 15.10 1.40 30.21 15 50 38.4 7.7 23 .867234 7 46 22.66 15 59 6.5 14.02 1.3U 18.73 15 59 39.3 7.1 31 .864133 7 53 45.58 16 1 0.1 13.43 1.24 17.91 16 1 31.4 6.4 Sept. 1 .863220 7 56 21.08 16 0 57.1 13 22 1.22 17.65 16 1 38.0 7.3 2 .862364 7 59 3.51 16 0 32.4 13.03 1.20 17.39 16 1 3.8 4.5 3 .861563 8 1 50.66 15 59 45.3 12.85 1.19 17.14 16 0 15.3 5.4 6 .859464 8 10 38.57 15 55 2.5 IS. 30 1.14 16.49 15 55 31.3 7.4 7 .858880 8 13 42.74 15 52 39.2 12.12 1.12 16.21 15 53 7.5 7.6 8 .858300 8 16 50.70 + 15 49 50.5 + 11.94 1.11 15.99 + 15 50 18.4 + 6.3 CCV111 OBSERVATIONS COMPARED WITH EPHEMERIS. VENUS II. Computation for Washington Equatorial observations. Parallax. Scull-diameter. Date. Wash. M.T. in dec. of day. Tab. a. Tab. 8. Obs. part. Comp'd 0. Ad. a. d. a. d. d. h. m. I. • i n i. ii n . / 11 r 1852.-May 31 June 5 .342197 .347380 7 46 40.52 8 1 37.88 + 23 52 47.8 23 50 52.4 — 0.85 0.92 — 7.67 8.64 .04 .12 15.65 16.82 C. C. + 23 52 40.1 22 50 43.8 — 1.4 1.9 9 .347612 8 12 0.17 21 57 34.7 0.97 9.39 .19 17.87 C. 21 57 25.3 — 1.4 11 .386008 8 16 41.33 21 29 32.6 — 1.01 11.11 .23 18.44 C. 21 29 21.5 Aug. 28 .656998 7 41 30.31 15 55 55.5 -J- 1.03 11.02 .29 19.36 C. 15 55 44.5 29 .656897 7 48 14.05 -f 15 59 53.5 + 0.98 —10.44 .23 18.51 C. + 15 59 43.1 + 7.4 VENUS II. Computation for Greenwich, Meridian observations. Date. Wash. M.T. in dec. of day. Tabular. Parallax. Comp'd O. Ad. a. d. 1852 (May 24) .919003 A. m. i. 7 21 2.33 o / /; + 25 10 32.1 — 6.15 o / II -f- 25 10 25.95 ii — 4.20 (July 3) .860244 8 33 54.77 16 46 8.9 14.48 16 45 54.42 — 2.44 (5) .853424 8 31 56.57 16 25 15.0 15.01 16 24 59.99 -f 0.51 (6) .849844 8 30 43.11 16 15 23.1 15.27 16 15 7.83 — 1.48 (7) .846159 8 29 20.32 16 5 55.9 15.52 16 5 40.38 — 0.43 ( 8) .842367 8 27 48.44 15 56 54.9 15.76 15 56 38.44 -f. 0.28 (12) .826235 8 20 17.47 15 25 15.4 16.62 15 24 58.78 — 0.08 (13) .821994 8 18 6.22 15 18 30.3 16.80 15 18 13.50 + 1.34 (16) .808856 8 10 58.01 15 1 6.9 17.25 15 0 49.65 1.35 22 .777107 7 52 43.02 14 37 18.4 17.58 14 37 0.82 3.02 Aug. 4 .724006 7 27 17.05 14 46 56.4 15.79 14 46 40.61 5.32 12 .700009 7 24 10.42 15 13 30.0 13.97 15 13 16.03 6.98 24 .676523 7 37 34.14 1551 56.4 11.42 15 51 44.98 7.01 30 .669224 7 50 41.95 16 0 36.1 10.40 16 0 25.70 5.95 Sept. 1 .667327 7 55 49.80 16 0 59.3 10.09 16 0 49.21 5.93 2 .666464 7 58 31.28 16 0 39.0 9.95 16 0 29.05 6.27 13 .660091 8 32 41 .41 + 15 30 12.5 — 8.66 + 15 30 3.84 + 6.18 OBSERVATIONS COMPARED WITH EPHEMERIS. CC1X VENUS II. Computation for Cracow Meridian Observations. Date. Washington M.T. in dec. of day. Tabular Parallax. Comp'd <^ Ad. a. 8. 1852.-June 2 3 .860169 .859535 A. m. 5. 7 51 25.64 7 54 27.33 « / It + 23 34 41 ,1 23 22 26.1 + 6.99 7.15 + 23 34 48.7 23 22 33.3 it + 2.0 — 1.2 4 .858841 7 57 24.08 23 9 55.6 7.30 23 10 2.9 3.2 5 .858096 8 0 15.73 22 57 11.4 7.47 22 57 18.9 6.4 7 .856414 8 5 43.15 22 31 5.4 7.81 22 31 13.2 1.2 8 .855476 8 8 18.62 22 17 46.1 7.99 23 17 54.1 - 0.4 11 12 14 .852266 .851051 .848404 8 15 30.14 8 17 41.79 8 21 45.71 21 36 55.6 21 23 5.4 20 55 11.4 8.55 8.75 9.17 21 37 4.2 21 23 14.2 20 55 20.6 + 0.3 + 1-5 — 5.5 17 .843838 8 27 0.27 20 13 5.9 9.83 20 13.15.7 + 5.2 18 .842153 8 28 30.60 19 59 5.3 10.06 19 59 15.4 — 2.7 23 .832345 8.34 3.66 18 50 9.3 11.29 18 50 20.6 0.1 26 . 825272 8 35 40.79 18 10 29.8 12.07 18 10 41.9 — 1.7 27 Aug. 17 .822707 .633265 8 35 54.86 7 27 19.27 17 57 41.5 15 31 15.4 12.34 12.41 17 57 53.8 15 31 27.8 + 6.4 13.6 18 .631268 7 28 23.13 + 15 34 38.9 + 12.20 + 15 34 51.1 + 6.3 8. SOLAR PARALLAX FROM CORRESPONDENT OBSERVATIONS. The fewness and insufficiency of the correspondent observations have already been shown and commented upon. It is nevertheless proper to deduce such resultant values as they afford, and this the preceding computations now enable us readily to do. The comparisons in these cases having been made with the same star and nearly at the same time, the corrections of the ephemeris and of the semidiameter may be regarded as constant for the interval which may have elapsed between the northern and the southern observation. The paucity of material renders any attempts to eliminate the influence of irradiation or of personal equation altogether futile, and the formula thus assumes a very simple shape. The comparison of the planet with a fixed star gives the equation — 3 — d=3 — d J80 +0.082855 +196.2 +16.26 —69.09 +22.20 +26.77 — 3.86 +3.123 +1.236 14 .270502 +0.089357 +223.9 +19.98 —71.08 +22.57 +27.93 — 0.60 +3.258 +0.184 21 .255156 +0.072671 +416.8 +30.29 —85.50 +25.34 +30.52 + 0.65 +3.562 —0.182 1851. Jan. 15 .709001 —0.100402 —100.9 +10.13 —16.10 —22.74 +27.50 — 1.21 +3.209 +0.377 2. CAMBRIDGE AND SANTIAGO. Obs. Date. t. 20. A* 1&DtS. Dm^ — Dm,, r—r\ Pf—Pl S. 7,- 7. ^2 Kl i». Mars I Dec. 17 .393840 d. +0.120673 it + 66.7 a + 8.05 n —18.43 n —7.98 II +18.51 +0.15 11 +2.160 n —0.069 27 .354435 +0.110039 — 17.0 — 1.87 — 7.30 —7.69 + 17.21 +0.38 +2.012 —0.169 31 .432708 —0.049189 — 40.1 + 1.97 —27.84 +7.50 +15.65 —2.72 + 1.826 +0.148 Jan. 1 .341972 +0.121550 — 44.2 — 5.37 —21.12 +7.45 +17.21 —1.83 +1 .996 +0.917 4 .338392 +0.140068 — 55.1 — 7.72 — 1.16 —7.29 +16.91 +0 74 +1.972 —0.375 3. GREENWICH AND SANTIAGO. Obi. Date. t. 20. A* 20 A*- Dm^ — Dn>2 r—ri P2— Pi A 2 1 iw. Man I Dec. 15 27 .344062 .246983 d. +0.143640 +0.384943 II + 86.2 - 16.1 II +12.38 — 6.20 —29.51 —12.99 - it + 18.36 +20.63 +1.23 + 1.44 It +2.142 +2.407 n —0.574 —0.598 Jan. 4 7 .292951 .263561 •- +0.231951 +0.266803 — 55.0 — 61.6 — * —12.76 -16.44 - 1.33 + 2.53 — +17.29 +17.19 +3.20 +3.28 +2.017 +2. 005 —1.587 —1.636 EQUATIONS OF CONDITION. CCX111 §9. EQUATIONS OF CONDITION. We have now the means of forming our equations of condition for each series, as proposed in § 3 ; and the coefficients of the unknown quantities in each equation of the several sets, being computed as there described and arranged in tabular form, are given in the present section ; the equations being numbered for convenience of reference to the observations from which they are respectively derived. The values of a and d being always unity, it is of course unnecessary to include them in the tables, for no confusion or embarrassment can arise on account of their signs, inasmuch as a is always positive, and d has the same sign as 'e. The quantity s denotes, as usual, the sum of all the coefficients, andj> the weight, computed as hereafter to be explained. The unknown quantity v, which is the correction to the adopted value of a revolution of the micrometer-screw, has only been introduced in the equations derived from observations at Santiago and the Cape, — these being the only ones, excepting the Washington series, in which the number of comparisons and fullness of detail render the determination practicable with sufficient accuracy. At Washington, there were a number of declination-threads upon the diaphragm carried by the micrometer-screw, so that the interval actually traversed in measuring a difference of declination was in every case small. To the groups of equations of condition, as given by the comparison of each observation with the place of the planet derived from computation, are to be added still other series resulting from the comparison of the measurements of the respective limbs, and capable of serving to some extent as aids toward freeing our equations from the influence of the two unknown quantities which affect the apparent diameters. These unknown quantities, which have been denoted by the letters t and u, measure, respectively, the error of the normal semidiameter added to such irradiation as may be inversely proportional to the distance, and that portion of the irradiation which is peculiar to the observer and the instrument, with which last is inseparably merged the personal equation of a limb-pointing and any error in the assumed thickness of the threads. Each measurement of a diameter furnishes an equation containing these two unknown quantities t and u ; and, iu addition to the direct measurements, each of those observations, which consist of comparisons of the limbs of the planet, affords a measurement of the diameter. We thus obtain a large number of additional equations which may be directly incorporated with the others. They comprise two classes : the one consisting of direct measurements of diameters, for which the differential refraction is utterly insensible; and the other, which includes the great majority of cases, being affected by the motion of the planet during the interval, often very con- siderable, between the means of these poin lings for the different limbs, and also by the change of the refraction during the same interval. To the regular equations of condition are appended these additional ones, arranged like the others in tabular form, the two classes being separately given. To form the equations of condition for these last mentioned cases, let us retain the former notation,* affixing one or two accents to the symbols, according as they refer to the first or second observation. For the first observed limb, we shall then ha,ve — 0= d.'± -£, Po — k*. — 3' + x + y (i'—T) + 1 (f — T)* ± (t\ + 2) ±2? (V f *.) + Jm'.f — W* and for the second — 0=5." =F ^77 />.— *"»-.— ff' + * + y (t"— T) + z (t"— T7)2 =F (tn+ g) =F 33 (V + »•) + Jm".it—V'i* °To avoid unnecessary complication, the factors 20 and 1000, which are combined with y and z in the numerical solution, are here disregarded. CCX1V EQUATIONS OF CONDITION. in which equations the signs are respectively correspondent. Thus, if the time t belong to a comparison or mean of comparisons of the north limb, and the upper sign is consequently to be taken, the upper sign will also hold in the other equation, which will belong to a comparison of the south limb; and so in the reverse case. The sum and difference of the foregoing equations give, after halving— + z . i { («"- rp + (t'-TY\ =F i 7-57 C^+O +4 (^ 0 = 1 («.« - *.') =F 1 ^ + ff IV- (V - V) -o - i («"- «') =F (*,+ 3) + 1 • i («" - 0 + *.) + 4 ( M>- Am!) ? - 1 (V'—V) i- Let us now, slightly varying the notation of § 3, denote the middle time \ (V + t') by t, and the half-interval | (<"—/') by r,and consider the unaccented symbols as pertaining to the instant t. We shall then have,* omitting all terms of the third and higher powers— 8» = 8. + rZ?A + 4 ''A8*. *•' = *• - rA«. + 4 ^ Aa*. Jfcf' = k + rDJc + ^ r*D\k V=Jc — rDJc + Jm" = (3" — d) = (3 — d) + * (5" — 5') Jm' = (^— d) = ( "-r)a=(«— r)a + 2r(«— T) + r9 (t'-T^=(d — T? — 2r (t— T) The substitution of these expressions in the preceding equations gives us— in both which formulas the upper sign is to be taken if the north limb was first observed, and the lower sign if the observation of the south limb preceded. By reason of the smallness of r, all consideration of many of the terms may be dispensed with. Not only do all the terms of the second order become negligible, but the quantities T Dt ^ j /)„ + (lp + i0) ? in the first, and r Dt&. tfca-0 = rZ>tjo, or the variation of the parallax during the interval. Our equations thus assume the form — 0 = cos if/ ^-r- sin (0 — a.) The quantity -^L. varies between narrow limits during each series of observations, and p cos 9. 71950 9.04106 n9. 84942 0.1572S 0.11893 0.3802 2.063 1.3150 3.63 16 21 K9.68050 8.96306 719.63488 0.15596 0.20774 0.6902 3.051 1.6134 3.22 17 22 n9. 63117 8.86440 n9. 21511 0.16206 0.28639 0.5798 2.109 1.9337 4.85 18 23 n9. 57850 8.75906 7.69897 0.15683 0.32601 0.5911 2.059 2.1184 5.02 19 21 719.51643 8.63492 8.92117 0.15747 0.34938 0.5315 9.066 2.3355 5.20 20 25 n9. 44491 8.49188 8.96848 0.15573 0.33730 0.4914 2.049 2.2767 5.25 21 26 n9. 35892 8.31990 8.37840 0.15414 0.35072 0.4314 3.034 2.2424 5.39 23 27 119.25048 8.10302. n9. 04454 0.15-256 0.33139 0.3617 3.019 2.1448 5.18 23 30 n8. 47647 6.55500 0.12902 0.14174 0.56846 9.6990 1.921 3.7022 i.Ol 24 31 8.30974 6.22154 9.99432 0.14079 0.53027 nO.2041 1.912 3.3905 5.11 25 1850.— Jan. 1 8.84594 7.29393 9.73448 0 13759 0.47531 9.9031 1.884 2.9875 5.23 26 9 9.08016 7.76238 8.89818 0.13548 0.41015 9.0000 1.866 2.5713 5.11 27 4 9.34325 8.28856 n9. 65292 0.12943 6. 32986 0.0000 1.815 2.1373 5.29 28 6 9.50279 8.60764 nO.20082 0.11684 0.03326 0.0798 1.713 1.0796 4.14 29 9.50739 8.61684 t.0. 21021 0.11954 0.02420 9.954-2 1.734 1.0573 3.89 30 7 9.56803 8.73812 nO. 34467 0.11892 9.72280 0.1461 1.729 + 0.5282 4.92 31 8 9.62318 8.84842 nO. 46367 0.11532 718.07943 0.0414 1.701 — 0.0478 4.68 32 1 9.67169 8.94544 nO. 54067 0.11158 n9. 79386 0.0000 1.679 — 0.6221 4.68 33 10 9.71622 9.03450 0.34796 0. 10705 0.71065 TiO.0414 1.037 + 5.1363 4.60 34 11 9.75564 9.11334 0 20132 0.10399 | 0.65866 rill. 1139 1.607 4.5568 4.60 35 12 9.79190 9.18586 9.97443 0.09998 0.59927 n9.8451 1.585 3.9744 4.69 38 13 9.82f)32 9.25270 9.48657 0.09586 0.53165 119.4771 1.555 3.4013 4.60 37 14 9.85695 9.31596 n9. 51786 0.09161 0.45204 719.4771 1.525 2.8317 4.85 38 15 9.88600 9.37406 7i9. 97918 0.08757 0.35715 0.0000 1.497 2.2759 4.75 39 9.88752 9 37710 719.98704 0.07389 0.34733 nO.2553 1.405 2.2250 1.70 40 16 9.91332 9.42870 nO. 19153 0.08333 0.24172 n9.C990 1.488 1.7447 4.91 41 17 9.93903 9.48012 nO. 33199 0.07899 0.08736 1.439 1.2228 5.02 42 18 ^.96334 9.52874 710.43433 0.07459 9.86082 9.4771 1.410 0.7258 4.85 43 19 Y 98586 9.56358 0 49203 0.07081 0.82060 nO.7404 1.386 6.6160 1.70 44 20 0.00763 9.61732 0.40971 0.06653 0.79001 7)0.5911 1.358 | 6.1662 4.13 45 21 0.02871 9.65948 0.31377 O.OC198 0.75875 nO.6232 1.330 5.7378 4.57 46 22 0.04863 9.69933 0.19634 0.05621 0.72662 710.4914 1.295 5.3287 4.82 47 23 0.06730 9.73666 0.05119 0.05360 9.69631 nO.4150 1.280 4. MSI 4.13 48 0.06821 9.73848 0.04793 0.04200 0.69340 nO.6435 1.313 4.9362 3.21 49 34 0.08590 9.77386 9.84553 0.04705 0.66538 1 nO.5051 1.242 4.6279 4.75 50 25 0.10320 9.80846 9.49748 0.04368 0.63667 710.55B3 1.223 4.3318 4.75 51 26 0.12002 9.84210 n8. 73878 0.03870 0.60766 710.5315 1.195 4.0519 4.57 52 27 0.13591 9.87388 n9. 59184 0.03591 0.58103 nO.5185 1.180 3.8109 4.66 53 28 0.15173 9.90552 n9. 8562-2 0.03952 0.55345 nO ; 1,146 3.5764 4.79 54 29 0.16657 9.93520 719.99577 0.02663 0.53171 nO.5315 1.130 3.4018 4.75 55 31 0.19522 9.99-250 nO. 17131 0.01618 0.49231 710.4914 1.081 + 3.10T8 4.90 Z4° CCXV111 „ EQUATIONS OP CONDITION. FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. MARS I. Equatorial, Santiago. M°. Date. Wash. M.T. Obs'il.f. 2r. w. *rA*. f. n. log. C. log. S. log. n. p. 1 1849.— Dec. 10 .5155 // 9.19 0.329 // +0.443 +0.15 8.03 —1.01 0.23602 0.43488 nO.0043 3.77 2 11 .4277 11.14 0.020 0.426 0.01 8.03 3.10 0.23609 0.43493 nO.4914 1.95 3 .4646 10.49 0.296 0.425 0.13 8.03 2.i)9 0.23609 0.43493 nO.4133 3.86 4 .5093 10.24 0.004 0.424 0.00 8.03 2.21 0.23609 0.43493 nO.3444 2.83 5 12 .4118 11.04 0.014 0.395 0.01 8.03 3.00 0.23604 0.43490 nO.4771 1.95 6 .4452 10.04 0.388 0.394 0.13 8.03 2.12 0.23604 0.43490 nO.3263 2.67 7 13 .4914 10.31 0.085 0.360 0.01 8.03 2.27 0.23581 0.43475 7i0.3560 4.60 8 14 .4731 10.08 0.011 0.328 0.00 8.02 2.06 0.23543 0.43451 nO.3139 4.37 9 15 .4159 10.45 0.038 0.297 0.01 8.01 2.45 0.23491 0.43417 nO.3892 3.77 10 .4890 10.30 0.259 0.295 0.08 8.01 2.37 0.23486 0.434M «0.3747 4.42 11 16 .4107 9.70 0.107 0.264 0.03 8.00 .67 0.23423 0.43374 7i0.2227 5.24 12 17 .4542 9.10 0.355 0.230 0.08 7.98 .04 0.23333 0.43318 nO.0170 4.91 13 18 .4312 9.52 1.003 0?198 +0.20 7.96 .33 0.23234 0.43256 nO.1239 4.28 14 20 .4267 9.32 1.168 0.133 —0.16 7.92 .60 0.22986 0.43089 nO.2041 3.50 15 .5161 8.72 2.914 0.131 0.38 7.91 .09 0.22973 0.43091 nO.0374 2.67 16 21 .4165 10.52 1.148 0.103 0.18 7.89 S.79 0.22840 0.43007 TiO.4456 2.35 17 22 .4455 10.04 0.790 0.072 0.06 7.86 2.24 0.22673 0.42903 nO.3502 4.24 18 23 .4225 9.73 0.530 0.044 0.02 7.83 1.92 0.22500 0.42794 710.2833 4.50 19 24 .4316 10.02 0.531 +0.013 —0.01 7.79 2.44 0.22307 0.42673 nO.3874 4.80 20 25 .4289 9.63 0.239 —0.011 +0.00 7.76 1.87 0.22102 0.42545 nO.2718 4.88 21 36 .4297 9.99 0.322 0.036 0.01 7.72 2.26 0.21883 0.42403 nO.3541 5.14 22 27 .4395 9.96 0.350 0.060 0.02 7.68 2.26 0.21649 0.42262 nO.3541 4.77 33 30 .4008 9.86 0,275 0.121 0.03 7.55 2.28 0.20887 0.41790 nO.3579 4.53 24 31 .4081 9.55 0.405 0.139 0.06 7.50 1.99 0.20602 0.41614 nO.2989 4.70 25 1850.-Jan. 1 .4027 10.02 0.019 0.155 0.03 7.44 2.55 0.21)312 0.41436 nO.4065 4.91 36 2 .4054 9.90 0.604 0.169 0.10 7.39 2.41 0.20008 0.41249 nO.3820 4.70 27 4 .4084 9.73 0.338 0.192 0.07 7.29 2.37 0.19370 0.40859 nO.3747 5.00 28 6 .3654 9.82 0.714 0.209 0.15 7.18 2.51 0.18708 0.40457 nO.3997 3.27 29 .4331 9.65 1.039 0.209 0.22 7.17 2.23 0.18665 0.40443 nO.3483 1.95 30 7 .3970 9.82 0.019 0.215 0.00 7.12 2.70 0.18347 0.40238 nO.4314 4.37 31 8 .3985 10.09 0.731 0.220 0.16 7.06 2.82 0.17986 0.40021 nO.4502 4.00 32 9 .3913 9.75 0.883 0.223 0.20 7.00 2.55 0.17623 0.39803 nO.4065 4.00 33 10 .4053 9.79 1.045 0.224 0.23 6.94 2.62 0.17241 0.39574 n0.4I83 3.86 34 11 .3939 9.38 0.935 0.224 0.21 6.88 2.29 0.16864 0.3934? nO.3598 3.86 35 12 .3859 9.30 0.952 0.223 0.21 6.82 2.27 0.16479 0.39121 710.3560 4.00 36 13 .3768 10.25 0.853 0 221 0.19 6.76 3.30 0.16089 0.38889 nO.5185 3.86 37 14 .3872 9.25 0.734 0.217 0.16 6.69 2.40 0.15686 0.38651 TiO.3802 4.24 38 15 .3825 9.44 0.672 0.212 +0.14 6.63 2.67 0.15283 0.38413 nO.4265 4.13 39 .4364 7.80 0.797 0.212 —0.17 6.62 1.35 0.15261 0.38400 nO.1303 1.00 40 16 .3817 9.29 0.088 0.207 +0.02 6.57 2.70 0.14873 0.38173 nO.4314 4.33 41 17 .3803 9.48 0.656 0.201 0.13 6.51 2,84 0.14460 0.37932 nO.4533 4.50 42 18 .3801 9.76 0.465 0.194 0.09 6.45 3.22 0.14042 0.37689 nO.5079 4.24 43 19 .3591 9.36 2.364 0.186 0.44 6.38 2.54 0.13631 0.'37451 710.4048 1.00 44 20 .3547 8.27 0.614 0.178 0.11 6.32 1.84 0.13208 0.37208 nO.3096 3.27 45 21 .3672 8.85 0.795 0.170 0.13 6.26 2.46 0.12776 0.36959 nO.3909 3.86 46 22 .3694 8.26 0.664 0.160 0.11 6.20 1.95 0.12345 0.36713 nO.2900 4.24 47 23 .3519 8.33 0.800 0.151 0.12 6.14 2.07 0.11921 0.36471 nO.3160 3.27 48 .4074 7.93 0.144 0.150 0.02 6.14 1.77 0.11897 0.36457 nO.2480 2.25 49 24 .3738 8.23 0.793 0.142 0.11 6.08 2.04 0.11478 0.3622D nO.3096 4.13 50 25 .3646 7.74 0.676 0.132 0.09 6.02 1.63 0.11047 0.35977 nO.2122 4.13 51 26 .3658 8.92 1.518 0.123 0.19 5.96 2.76 0.10610 0.35732 nO.4393 3.86 53 27 .3485 7.45 1.015 0.114 +0.12 5.90 1.43 0.10179 0.35490 nO.1553 3.99 38 .3628 8.02 0.008 0.104 —0.00 5.84 2.18 0.09734 0.35242 TiO.3385 4.18 54 29 .3492 7.55 0.629 0.095 +0.06 5.78 1.71 0.09302 0.35002 nO.2330 4.13 31 .3513 7.85 0.516 —0.077 +0.04 5.66 -2.05 0.08423 0.34519 nO.3118 4.33 EQUATIONS OP CONDITION". FORMATION OF EQUATIONS OF CONDITION. PIARS I. Equatorial, Washington. (1JOTH LIMBS OBSERVED THROUGHOUT.) CCX1X N°. Date. log. b. log. C. log. g. log. 8. log. H. &2. S. P- 1 1849.— Nov. 2 nO. 46535 0.53276 n9. 50709 0.05022 0.8129 0.1362 + 1.1226 2.57 2 4 nO. 45060 0.50326 n9. 63197 9.97128 0.6435 0.1830 0.9360 3.43 3 nO. 45023 0.50252 n9. 56947 9.99550 0.6)35 0. 1377 0.9897 3.73 4 6 nO. 43496 0.47198 n9.63292 9.90991 0.5798 0.1844 0.8127 3.84 5 12 nO. 38426 0.3-058 n9. 62111 9.70492 0.8069 0.1747 0.5069 3.87 6 nO. 38372 0.36950 n9. 56528 9.74453 O.S062 0.1351 0.5553 3.27 7 13 nO. 37551 0.35308 n9. 66434 9.62201 0.8976 0.2131 0.4188 3.79 8 24 uO 26117 0.12440 ii9.64391 8.82317 0.7634 0.1940 0.0668 3.60 9 26 nO.23667 0.07540 n9. 63064 8.57864 0.6812 0.1825 0.0379 4.83 10 nO. 23555 0.07316 n9. 58044 8.91803 0.5315 0.1448 •f 0.0828 4.34 11 Dec. 6 nO. 08828 9.77862 «9. 60374 n8.42160 0.9445 0.1612 — 0.0284 4.57 12 nO. 08803 9.77812 n9. 58829 nS.08636 0.7853 0.1502 0.0122 4.49 13 11 n9. 99044 9 5S294 B9.65828 n8. 70501 0.3617 0.2073 — 0.0507 4.03 14 12 n9.96704 9.53614 r.9. 60719 8.07918 0.8513 0.1638 + 0.0120 4.39 15 17 n9. 83108 9.26418 l»9. 59666 9.04493 0.5315 0.1561 0.1109 5.15 16 27 n9.25556 8.11318 nil. 59061 9.64670 0.5051 0.1518 0.4433 5.22 17 31 8.29509 6.19224 ».9.56366 9.8154.1 0.3617 0.1341 0.6538 4.82 18 ISSO.-Jan. 5 9.43002 8.46210 ti9. 54320 9.97722 9 7782 0.1230 0.9469 4.83 19 9 9.67030 8.94266 n9.54162 0.08196 nil. .191-1 0.1211 1.2077 4.32 20 12 9.79036 9.18478 n9. 54531 0.15183 9.4771 0.1233 1.4185 4.30 21 14 9.85644 9.31494 n9. 49884 0.20672 n9.6021 0.0995 1.6096 3.64 22 22 0.04802 9.69810 n9. 47696 0.36474 nO.1139 (i.i 11 no 2.3160 4.71 23 29 0.16545 9.93296 n9. 50285 0.47749 n0.146l 0.1013 + 3.0025 3.21 FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. MARS I. Equatorial, Washington. N". Date. Wash. M.T. ObsM r. 2r. Wo- I^ITDtda. r. n. log. €. log. S. log. n. P- 1 1849.— Nov. 2 .8189 n 10.43 1.976 -f 0.510 — 0.99 a 6.60 II —4.84 0.15127 0.38332 r>0.6849 2.S5 3 4 .7681 11.45 0.240 0.538 + 0.13 6.71 4.56 0.15778 0.38705 nO.6590 3.00 3,4 .8159 9.26 0.002 0.536 — 0.00 6.71 2.57 0. 15794 0.38714 nO.4099 3.50 5 12 .7639 13.90 0.002 0.642 0.00 7 1^ fi.83 0.18349 0.40269 ; nO.8344 4.75 6 .8248 12.65 0.002 0.643 0.00 7.lP 5.55 0.18367 0.40250 nO.7443 3.27 7 13 .7307 10.83 0.002 0.654 — 0.00 7.16 3.73 0.18643 0.40417 nO.5717 4.50 8 24 .7914 10.09 0.504 0.716 + 0.36 7.66 1.95 0.91359 0.42078 t.0.2900 3.00 9 26 .7236 11.01 0.002 0.708 — 0.00 7.74 3.31 0.22001 0.42482 nO.5198 5.12 10 .8120 11.23 0.002 0.708 — 0.00 7.74 3.50 0.92018 0.42492 nil. .Mil 4.13 11,12 Dec. 6 .4918 11.17 0.989 0.566 + 0.56 7.99 2.60 0.93416 0.43371 nO.4150 3.77 13 11 .4356 11.96 0.080 0.425 0.04 8.03 3.83 0.23611 0,43494 nO.5833 3.13 14 12 .4619 11.55 0.571 0.395 + 0.23 8.03 3.95 0.23604 0.43490 nO.5119 3.59 15 17 .4452 9.80 1.311 + 0.230 — 0.30 7.98 2.16 0.23334 0.43318 nO.3345 4.71 16 27 .3976 9.20 0.032 — 0.059 -f 0.00 7.68 1.56 0.21659 0.42S69 nO. 1931 4.85 17 3k .3952 12.18 0.297 0.139 — 0.04 7.50 4.69 0.90608 0.41618 nO.6712 4.94 18 1850.— Jan. 5 .3833 10.11 2.317 0.201 0.47 7.23 3.31 0.19044 0.40661 nO.5198 4.24 19 9 .3612 7.73 0.661 0.223 0.15 7.00 0.85 0.17632 0.39808 n9.9294 3.50 20 19 .3419 8.45 0.159 0.223 0.04 6.89 1.63 0.16497 0.38130 nO.2122 3.43 91 14 .3703 9.59 0.783 0.217 0.17 6.69 3.05 0.15693 0.38655 1.0.4843 1.71 92 22 .3385 7.46 0.527 0.161 0.08 6.20 1.32 0.12358 0.36720 nO.1206 4.06 93 29 .2753 8.54 0.600 — 0.098 — 0.06 5.78 —2.78 0.09335 0.35021 i.0. 44 IIP 2.25 ccxx EQl ATIONS OF CONDITION. FORMATION OP EQUATIONS OF CONDITION. MARS I. Equatorial, Cape of Good Hope. (BOTH LIMBS OBSERVED THROUGHOUT.) N, Date. log. b. log. C. log./. log. g. log. S. log. n. ft 8. P- 1 1849.— Nov.31 nO.29768 0.19742 0,78061 0.13902 0 90320 0.5051 1.8969 +8.0031 2.58 2 nO. 29768 0.19743 9.72933 0.13902 0.39f68 0.6990 1.8969 2.5043 3.66 3 22 nO. 28597 0.17400 0.43476 0.13916 0.66838 0.6232 1.8981 4.6599 3.66 4 24 nO. 26328 0.12862 0.50742 0.14864 0.71064 0.6902 1.9828 5.1361 2.56 5 25 nO.25142 0.10490 n9. 86314 0.15139 0.07060 0.6990 2.0081 + 1.17C5 3.11 6 nO.25142 0.10490 nO. 36882 0.15139 n9. 63518 0.6902 2.0081 — 0.4317 3.94 7 26 nO.23881 0.07968 0.13975 0.15143 0.51391 0.5S63 3.0085 + 3.2652 3.11 8 27 nO. 22657 0.05520 nO. 44438 0.15572 na. 95434 0.7559 2.0485 — 0.9002 3.83 9 28 nO. 21355 0.02916 .19.88497 0.15779 0.04340 0.7076 2.0681 + 1 . 1051 3.69 10 29 >iO. 19959 0.00124 0.11535 0.15501 0.49866 0.5798 2.0418 3.1525 3.94 11 30 nO. 18655 9.97516 0.49782 0.15858 0.69853 0.5441 2.0757 4,9949 3.44 13 Dec. 1 nO. 17187 9.94580 0.41987 0.16361 0.65169 0.6812 2.1243 4.4842 2.58 13 2 nO. 15618 9.91443 0.66500 0.15552 0.80907 0.5682 2.0466 + 6.4427 2.42 14 3 nO. 14168 9.88542 nO. 48352 0.16680 n«. 07696 0.7924 2.1557 — 1.1939 3.20 15 4 nO. 12579 9.85364 nO. 09861 0.16813 9.77517 0.7076 2.1690 + 0.5959 3.60 16 5 nO. 10938 9.82082 9.65753 0.16912 0.36288 0.7324 2.1789 2.3061 3.89 17 6 nO. 09200 9.78606 0.32990 0.17038 0.60130 0.7404 2.1916 3.9930 4.65 18 7 nO. 07438 9.75082 0.57108 0.17105 0.74694 0.5798 2.1983 5.5839 4.65 19 8 nO. 05541 9.71288 0.72084 0.17177 0.83269 0,6990 3.2056 7.1235 4.65 30 9 nO. 03576 9.67358 0.82755 0.17147 0.93412 0.6335 2.2026 8.5927 2.00 31 nO. 03580 9.67366 1.02548 0.17175 1.09604 0.6435 a. 2054 + 12.4750 2.62 32 10 nO. 01436 9.63078 nO. 63601 0.15696 nO. 39724 0.5563 2.0602 — 2.4960 2.94 23 11 119.99392 9.58990 nO.49322 0.17184 nO. 08814 0 6435 2.2064 — 1.2250 1.77 24 14 n9. 92305 9.44816 9.25115 0.17323 0.32457 0.4624 2.2206 + 2.1114 3.13 35 15 n9. 89678 9.39563 0.03318 0.17241 0.48100 0.4624 2.2122 3.0369 3.13 26 16 n9. 86848 9.33902 0.28292 0.17175 0.58917 0.0414 2.2054 3.8830 3.13 27 n9. 66751 9.33708 0.28565 0.17062 0.59015 0.3979 2.1940 3.8918 3.60 28 17 n9. 83688 9.27582 0.42431 0.16841 0.66577 0.4624 2.1718 4.6320 3.60 29 18 n 9. 804 47 9.21100 0.51655 0.16903 0.72313 0.4150 2.1780 5.2860 3.60 30 20 Ti9. 73124 9.06454 nO. 02824 0.16817 9.99260 0.6021 2.1694 0.9831 3.54 31 21 n9. 68765 8.97736 .19.85034 0.16112 0.12985 0.5798 3.1001 1.3485 3.54 33 22 .19.64141 8.88488 n9. 64513 0.16258 0.21780 0.5185 2.1143 1.6512 3.54 33 23 n9.59C66 8.78338 nil. 41095 0.16366 0.27212 0.4314 2.1248 1.8712 3.68 34 34 n!). 52841 8.65888 n9. 20412 0.15464 0.29572 0.4624 2.0384 1.9757 3.15 35 35 n9.46338 8.52883 n9. 15045 0.15897 0.31042 0.5051 2.0794 2.0437 3.83 36 37 26 n9. 46181 n9. 38297 8.52568 £ 8.36800 n9. 16584 R9.29358 0.15969 0.15452 0.31004 0.30374 0.5682 0.5441 2.0863 3.0372 2.0419 2.0125 3.82 3.82 39 40 39 1850,-Jan. 7 n9. 38003 n8. 95689 9.55489 8.36212 7.51584 8.71184 * 8.73159 n9. 88372 0.79161 0.15760 0.15033 0.12026 0.35683 0.19346 0.95028 0.3617 0.5051 0.1461 2.0663 1.9983 1.7399 8.2742 1.5612 8.9183 3.93 2.81 2.59 41 42 43 44 45 8 9 10 11 13 9.61193 9.66035 9.70544 9.74662 9.78403 8.82592 8.92276 9.01294 9.09530 9.17012 0.74582 0.69383 0.63510 0.56367 0.47820 0.11451 0.11467 0.11079 0.10576 0.1C071 0.92155 0.89124 0.85838 0.82085 0.77993 9.7782 0.3222 9.3010 9.6021 l.«945 1.6957 1.6657 1.6275 1.5901 8.3474 7.7846 7.3173 6.6198 6.0246 2.59 3.55 3.55 2.59 2.59 46 47 48 49 14 15 16 17 9.81789 9.84913 9.90715 9.93367 9.23784 9.30032 9.41636 9.46740 . 0.24S30 0.05258 9.71299 »8. 76641 ~— . 0.09388 0.09095 0.08528 0.08354 -" ' - —i 0.68297 0.63030 0.57997 0.51861 119.0000 9.6990 n9.6021 nO.0414 1.5408 1.5202 4 1.4810 1.4624 4.8191 4.2678 3.8016 + 3.3007 3.16 3.16 3.16 2.14 EQUATIONS OP CONDITION. CCXX1 FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. 1IIABS t. Equatorial, Cape of Good Hope. N°. Date. Wiisli.M.T Obs'd T. 2.T =^A »'. n log. e. log. S. log. n. P- J,a 1849.— Nov. 21 .3070 ii 9.49 2.74 + 1.96 7.53 + 0.02 0.20817 0.41747 8.3010 1.71 a 22 .3634 6.28 1.76 — 1.56 7.57 — 0.05 0.21078 0.41908 nS.6990 1.71 4 24 .3296 10.08 2.% + 1.47 7.66 — 6.94 0.21536 0.42192 n9.9731 1.71 5,6 25 .3174 6.49 1.53 — 1.09 7.69 + 0.11 0.21753 0.42327 9.0414 2.25 7 26 .3390 7.14 1.31 0.93 7.73 — 0.30 0.21966 0.42460 n9.477I 2.25 8 27 .3021 8.04 0.67 0.47 7.77 0.75 0.221:7 0.42579 n9.8751 3.50 9 28 .2979 7.52 0.68 0 47 7.80 0.20 0.22343 0.42696 119.3010 3.27 10 29 .3321 7.30 0.85 0.58 7.83 0.03 0.22526 0.42810 nS.4771 3.25 11 30 .2789 7.58 1.00 — 0.67 7.86 0.37 0.22676 0.42905 119.5682 1.71 13 Dec. 1 .2902 8.28 0.04 •f 0.03 7.89 — 0.36 0.22836 0.43005 n9.5563 1.95 13 2 .3444 6.43 1.70 — 1.10 7.92 •f 0.39 0.22984 0.430U8 9.5911 1.71 14 3 .2852 7.31 0.88 0.55 7.94 0.08 0.23103 0.43173 8.9031 3.25 15 4 .2813 7.08 0.71 0.43 7.96 0.45 0.23215 0.43243 9.6532 2.67 16 5 .2718 7.54 0.55 0.32 7.98 0.11 0.23316 0.43307 9.0414 3.00 17 6 .2813 6.03 0.17 0.10 7.99 + 1.86 0.23402 0.43361 0.2695 4.00 18 7 .8637 8.36 0.27 0.15 8.00 — 0.53 0.23473 0.43406 n9.7160 4.00 19 8 .2784 7.49 0.30 0.15 8.01 + 0.38 0.235:10 0.43443 9.5798 4.00 20,91 9 .2824 6.57 1.64 0.80 8.02 0.66 0.23573 0.43470 9.8195 1.48 22 10 . .3274 7.16 1.68 0.77 8.03 -f 0.08 0.23600 0.43487 8.9031 2.67 33 11 .2780 7.79 1.17 0.50 8.03 — 0.44 0.23611 0.43494 n9.6434 1.26 24 14 .2474 7.68 0.86 0.29 8.03 + U.05 0.23552 0.43456 8.6990 3.00 25 15 .2306 7.38 0.54 0.16 8.01 + 0.46 0.2S502 0.43424 9.6628 3.00 •26 16 .2255 9.09 0.43 0.12 8.00 — 1.22 0 23436 0.43383 nO.0864 3.00 27 .2586 B.43 0.00 0 8.00 — 0.41 0.23434 0.43382 n9.6138 4.00 28 17 .2626 7.35 0.34 0.06 7.88 •f 0.59 0.23351 0.43329 9.7709 4.00 n 18 .2503 6.83 0.37 0.07 7.96 + 1.08 0.23253 0.43267 0.0334 4.00 30 20 .2288 7.99 0.87 0.12 7.92 — 0.19 0.23013 0.43116 B9.2787 2.67 31 21 .2573 7.81 0.66 0.07 7.89 + 0.04 0.22S64 0.43022 8.6021 3.67 3i> 22 .2413 7.62 0.50 0.04 7.86 0.22 0.22707 0.42924 9.3424 2.67 33 23 .2072 6.80 0.35 — 0.02 7.83 1.01 0.22539 0.42819 0.0043 1.00 35,36 25 .1975 7.42 0.26 •f 0.00 7.76 0.34 •.22151 0.42576 9.5315 3.00 37,38 K .1857 7.44 0.37 0.02 7.73 0.30 0.21938 0.42443 9.4771 3.00 39 29 .1890 7.51 0.04 0.00 7.61 0.10 0.21211 0.41991 9.0000 1.95 40 1850.— Jan. 7 .1766 7.20 2.14 0.46 7.13 + 0.40 0.18424 0.40285 9.6021 1.71 41 8 .1838 7.59 1.82 0.40 7.07 — ».10 0.18064 0.40068 »9.0000 1.71 44 11 .1598 6.25 1.76 0.39 6.89 •f 1.04 0.16954 0.39402 0.0170 1.71 45 12 .1636 5.75 1.61 0 36 6.83 1.46 0.16566 0.39171 0.1644 1.71 46 14 .1498 6.27 1.42 0.31 6.71 0.76 0.15781 0.38706 9.8808 2.25 47 15 .1305 5.55 1.41 0.30 6.64 1.39 0.15385 0.38473 0.1430 2.25 48 16 .1504 6.33 0.36 0.07 6.58 0.33 0.14968 0.38228 9.5185 2.25 49 17 .1277 6.62 1.32 + 0.27 6.52 + 0.17 8.14565 0.37993 9.2305 2.25 ccxxn EQUATIONS OP CONDITION. FORMATION OF EQUATIONS OF CONDITION. MARS I. Meridian, Cape of Good Hope. N°. Date. Limb. log. b. log. C. log.0. log. S. log.W. &2. S. 1 1849. -Nov. 18 N.S. nO.32899 0.26004 0.13244 0.31035 0.60531 1.84 + 2.0434 2 19 N.S. nO. 31872 0.23950 0.13538 0.30501 0.55509 1.87 2.0184 3 21 N. S. nO. 29743 0.19692 0.14107 0.29535 0.65610 1.92 1.9740 4 32 N.S. tiO. 28638 0.17480 0.14378 0.29104 9.44716 1.94 1.9545 5 25 N. S. nO.25143 0.10492 0.15143 0.28021 0.95809 2.01 1.9064 6 S7 N.S. nO. 22647 0.05500 0.15575 0.27460 0.61805 2.05 1.8819 7 28 N.S. nO. 21344 0.02894 0.15807 0.27258 0.63448 2.07 1.8732 8 29 N.S. nO. 19999 0.00204 0.16008 0.27080 0.56585 2.09 1.8655 g 30 N.S. 7iO. 18011 9.97428 0.16196 0.26940 0.82086 2.11 1.8595 10 Dec. 1 N.S. nO. 17179 9.94564 0.16372 0.26834 0.79727 2.13 1.8550 11 2 N. S. nO. 15697 9.91600 0.16535 0.26766 0.58092 2.14 .8521 12 3 N.S. nO. 14164 9.88534 0.16683 0.26736 0.68931 2.16 .8508 13 4 N.S. nO. 12574 9.85354 0.16818 0.26736 0.45332 2.17 .8508 14 6 N.S. nO. 09208 9.78622 0.17046 0 26853 0.67486 2.19 .8558 15 7 N.S. nO. 07422 9.75050 0.17136 0.26961 0.53020 2.20 .H604 16 8 N.S. nO. 05559 9.71324 0.17212 0.27103 0.57519 2.21 .8665 17 9 N.S. nO.03613 9.67432 0.17271 0.27277 0.40140 2.22 .8740 18 10 N.S. nO.01576 9 63358 0.17315 0.27485 0.75358 2.22 1.8830 19 11 N.S. 1)9.99438 S. 59082 0.17342 0.27724 0.71600 2.22 1.8934 20 12 N.S. n9. 97189 9.54584 0.17352 0.27996 0.73239 . 1 2.22 1.9053 21 14 N.S. n9. 92310 9.44826 0.17325 0.28628 0.52114 2.22 1.9332 •23 15 N. S. n9. 89650 9.39506 0.17283 0.28988 9.97313 2.22 1.9493 23 16 N.S. n9. 88813 9.33832 0.17228 0.29374 0.36361 2.21 1.9667 24 17 H.8, n9. 83780 9.27766 0.17154 0.29787 nO. 33041 2.20 1.9856 25 18 N.S. n9. 80517 9.21240 0.17063 0.30231 0.29003 2.19 2.0059 26 30 N.S. n9. 73153 9.06512 0.16834 0.31192 0.40483 2.17 2.0508 27 21 N.S. n9. 68940 8.98086 0.16695 0.31710 0.30750 2.16 2.0754 28 22 N.S. 719.64276 8.88758 0.16537 0.32249 0.32428 2.14 2.1013 m 23 N.S. n9. 59050 8.78306 0.16368 0.32816 0.46687 2.13 2.1289 30 24 N.S. «9.53I(I8 8.66422 0.16182 0.33405 0.62839 2.11 2.1580 31 26 N.S. T.9. 38034 8.36274 0.15766 0.34649 0.52504 2.07 2.2307 32 27 N.S. n9. 27935 8.16076 0.15536 0.35301 0.32428 2.05 2.2543 33 29 N.S. n8. 95874 7.51954 0.15036 0.36663 0.34242 2.00 2.3261 34 81 N.S. 7.95228 5.50662 0.14484 0.38108 0.35411 1.95 2.4048 35 1850.— Jan. 3 N.S. 9.19990 8.00181 0.13569 0.40403 n9. 98677 1.87 2.5353 36 4 N.S. 9.31864 8.23934 0.13242 0.41199 nO. 18752 1.84 2.5822 37 7 N.S. 0.55359 8.70924 0.12205 0.43672 0 36173 1.75 2.7335 38 8 0. 9.61023 8.82250 0.11840 0.44521 0.05308 1.73 2.7875 39 9 C. 9.66032 8.92270 0.11468 0.45382 nO. 48144 1.70 2.8433 40 10 c. 9.70523 9.01252 0.11089 0.46256 nO.38917 1.67 2.90H 41 11 C. 9.74593 9.09392 0.10702 0.47138 n9. 88649 1.64 2.9606 42 12 0. 9.78314 9.16834 0.10310 0 48032 nO. 27875 1.61 3.0222 43 14 c. 9.84918 9.30042 0.09506 0.49845 nO.31242 1.55 3.1510 44 15 c. 9.87878 9.35964 0.09097 0.50764 nO. 36549 1.52 3.2184 45 16 c. 9.90650 9.41506 0.0868S 0.51689 nO. 30963 1.49 3.2877 46 17 c. 9 93256 9. 46" 18 0.08263 0.52621 nO. 24304 1.46 + 3.3590 EQUATIONS OF CONDITION. CCXX111 FORMATION OF EQUATIONS OF CONDITION. MARS I. Equatorial, Greenwich. (OBSERVID CENTRE.) NV Date. log. b. log. C. log. g. log. S. log. n. Jfe2. S. P- 1 1849.— Nov. 96 flO. 24150 0.08506 nO. 05695 n9. 82445 0.0414 1.300 — 0.6675 2.49 2 30 nO. 18550 9.97306 «9. 86027 n9. 50215 0.526 0.3178 3 Dec. 8 nO. 05720 9.71646 n9. 94918 n9. 70731 0.792 0.5097 4 15 ii'J.Hir.53 9.39332 n9. 86045 H9.42193 0.3802 0.526 0.2642 3.63 5 27 n». 29508 8.19222 n9. 99382 n9. 22427 9.9031 0.972 — 0.1676 4.15 6 1850— Jan. 4 9.31989 8.24184 ii 11. 8-257 7 9.74578 nO.2553 0.448 + 0.5569 3.21 7 5 9.40716 6.41638 1.9. 87292 9.72852 ..11.0114 0.557 0.5352 3.52 8 7 9.55207 8.70620 n9. 83910 9.85546 nO.2788 0.476 + 0.7169 3.21 FORMATION OF EQUATIONS OF CONDITION. MARS I. Meridian, Greenwich. N«. Date. Limb. log. b. log. C. log. g. log. S. log. n. i2. S. 1 1849.— Nov. 1 C. nO. 47393 0.54932 n9. 80336 9.96783 nO. 00000 0.4043 -f 0.9-266 2 6 C. nO. 43595 0.47396 )i9. 81685 9.77357 0.4771S 0.4302 0.5937 3 16 C. nO.34832 0.29870 l>9. 84024 8.82607 0.60206 0.4793 0,0670 4 30 N. nO. 18539 9.97286 n9. 86032 9.83385 0.69020 0.5253 0.6821 5 Dec. 4 N. nO. 12490 9.85186 n9. 86196 9.81298 0.59106 0.5296 0.6501 6 8 N. nO. 05461 9.71128 .19.86214 9.81451 0.51851 0.5300 0.6524 7 15 N. 119.89508 9.39223 n9.85809 9.86929 0.68194 0.5202 0.7401 8 17 N. n9. 83617 9.27440 n9. 85590 9.89470 0.59106 . 0.5150 0.7847 9 19 N. n9. 76802 9.13810 n9. 85324 9.92324 0.54407 0.5087 0.8380 10 27 N. n9.27347 8.14900 n9. 83829 0.05587 9.00000 0.4749 1.1373 11 28 N. n9. 13955 7.88116 n9. 83596 0.07346 0.20413 0.4698 1.1843 12 39 N. n8. 94488 7.49182 n9. 83354 0.09110 0.04139 0.4646 1.2334 13 1850.— Jan. 4 N. 9. 32394 8.24994 n9. 81704 0.19656 0.07918 0.4306 1.5724 14 I N. 9.41608 8.43422 n9. 81399 0.21376 9.69897 0.4246 1.6363 15 7 N. 9.55668 8.71442 n». 80765 0.24795 9.77815 0.4124 1.7699 16 23 N. 0.06366 9.72938 n9.74777 0. 49620 nO. 14613 0.3130 3.1347 17 30 N. 0.17810 9.95826 n9. 71835 0.59024 nO. 55630 0.2733 3.8926 18 Feb. 6 N. 0. 26861 0.13928 n9. 68823 0.67637 nO. 71600 0.2379 4.7464 19 7 N. 0.28012 0.16230 «9.68393 0.68807 nO. 74819 0.2333 4.8761 20 9 N. 0.30229 0.20664 n9. 67529 0.71110 nO. 78533 0.2242 5.1416 21 13 S. 0.34349 O.S8904 n9. 65815 0.56771 nO 78533 0.2072 3.6958 22 16 N. 0.37200 0.34606 n9. 64544 0.78757 nO. 83251 0.1954 6.1316 23 21 C. 0.41574 0.43354 n9.62466 0.77062 nO. 78533 0.1775 5.8968 24 22 C. 0.42400 0.45006 n9. 6-2065 0.78217 ti0.7V815 0.1743 + 6.0558 CCXX1V EQUATIONS OF CONDITION. FORMATION OF EQUATIONS OF CONDITION. MAUS I. Equatorial, Cambridge, N'. Date. Limb. log. b. log. C. lag. 6. log. g. log. S. log. n. » S. P- 1 1849.— Nov. 11 C. nO.38537 0.33280 119.66331 9.57031 0.6812 0.212 +0.3718 3.05 2 15 N. nO. 35469 0.31144 0.19304 n9. 80830 0.43171 0.3979 0.413 +2.7021 1.61 3 S. nO. 35461 0.31128 n0.193C6 n9. 85259 nO. 38725 0.748S 0.442 —2.4392 2.91 4 16 C. nO. 34792 0.29790 n9.fe307fl 8.88762 0.6128 0.463 +0.0772 3.S4 I S. nO. 34473 0.29152 nO. 19598 n9. 85888 nO. 40618 0.6232 0.522 —a. 5479 2.42 6 21 C. nO. 29608 0.19422 n9. 79181 nS.51322 0.6812 0.383 —0.0326 3.89 7 C. t.0.29290 0.18786 1.9.85324 n9. 13033 0.7404 0.508 0.1350 3.70 1 26 S. nO. 23354 0.06914 riO. 22050 n9. 91796 nO. 48130 0.7404 0.686 — 3.0S90 3.62 9 •M N. nO. 17980 9.96166 0.22754 «9.91300 0.35658 0.6628 0.670 +2.2729 2.28 10 Dec. 11 C. n9. 99349 9.58904 Ii9.9!tsl7 1.9. 68550 0.5798 0.787 —0 4844 3.52 11 17 N. n9. 83463 9.27132 0.23344 119.84016 0.40195 0.4914 0.479 +2.5232 3.62 13 27 N. 119.36371 8.12948 0.21675 n9. 77146 0.46036 0.2788 0.349 +2.8864 3.93 13 28 S. ti9. 13268 7.86742 nO. 21442 n9. 73024 nO. 36248 nO.4150 0.288 -2.3040 2.18 14 C. 1.9.12292 7.84790 n9. 72652 9.53339 n9.7782 0.284 +0.3415 3.00 15 29 N. n8. 80577 7.21360 0.21071 nO. 04085 0.39157 1.208 +2.4636 16 31 S. 8.35917 6 32040 1.0. 20589 *9. 64671 nO. 30758 0.079S 0.19« —2.0304 4.83 17 1850.— Jan. 1 C. 8.80777 7.21760 n9. 79451 9.64631 0.4771 0.388 +0.4429 4.75 18 4 N. 9.32923 8.26052 0.19416 n9. 79596 0.50109 9.3010 0.391 +3. 1702 3 62 19 5 C. 9.43045 8.46296 1.9.62889 9.94096 9.9031 0.181 +0.8729 .VJl FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. MARS I. Equatorial, Cambridge. N». Date. Wash. M.T. Ohs'd r. 2r. Wo- =FrZ>5. »v n. log. e. log. 8. log. n. p. 1 1849.— Nsv. 14 .6120 it 9.12 2.858 // + 0.665 // + 1.50 // 7.22 it -0.40 0. 18972 0.40617 n9.6021 2.44 4,5 16 .4398 6.80 1.107 0.683 ; — 0.74 7.31 0.32 0. 19507 0.40942 n9.5051 2.67 6 21 .4538 9.81 1.346 0.714 + 0.96 7.54 1.22 0.20855 0.41770 nO.0864 3.43 7 .7416 8.16 0.911 0.715 0.65 7.55 0.03 0.20926 0.41814 nS.4771 3.13 9 30 .7431 9.06 0.774 0.670 0.52 7.88 0.73 0.92754 0.42953 1.9.8633 1.54 10 Dec. 11 .2979 9.60 0.816 + 0.430 + 0.35 8.03 2.00 0.23611 0 43494 nO.3010 2.57 13,14 28 .3457 7.76 0.674 — 0.080 — 0.05 7.65 0.12 0.21427 0.42125 1.9.0792 3.00 19 1850.— Jan. 5 .3886 8.60 1.854 — 0.201 — 0.37 7.23 —1.02 0.19043 0.40660 1.0.0086 3.00 EQUATIONS OF CONDITION. CCXXV FORMATION OF EQUATIONS. MARS I. Meridian, Athens. N°. Date. Limb. log. b. \ logC. log. e. log.gr. log. S. log. n. £2. S. 1 1849.- Nov. 22 S. nO. 28654 0.17514 nO.21066 719.54970 TiO. 38321 1.11727 +0.126 —2.4166 . 2 23 N. nO.27521 0.15248 0.21303 719.55015 0.44937 0.91908 0.126 +2.8143 3 25 N. nO. 25161 0.10528 0.21749 n9. 55073 0.44467 0.94939 0.126 +2.7840 4 26 S. tiO. 23931 0.08068 nO. 21958 n9. 55077 710.40557 1.12057 0.126 —2.5443 5 28 S. nO. 21363 0.0-J932 710.22343 n9. 55080 nO. 41394 1.13033 0.126 —2.5938 6 29 N. nO. 20019 0.00241 0.22518 ti9. 55073 0.43840 0.90849 0.126 +2.74U 7 30 8. nO. 18633 9.97472 nO. 82683 119.55011 TiO. 42052 0.97313 0.128 —2.6334 8 Dee. 4 S. nO. 12597 9.8S400 llll.-J.TJ15 n9..-«4841 nO. 42849 1.07188 0.125 —2.6822 1 9 N. nO. 0364-2 9.674SO 0.23571 n9.544(l3 0.44031 0.93952 0.123 +2.7562 10 14 S. «9. 92348 9.449C2 nO. 23553 n9. 53779 710.41868 1 .09691 0.119 —26223 11 15 N. n9. 89689 9.39584 0.23502 n9. 53629 0 45244 0.91381 0.118 +2.8343 12 16 8. n9. 86855 9.33916 nO. 23436 «9. 53463 nO. 41135 1.07188 0.117 —2.5784 13 17. N. 719.83825 9.27f56 0.23355 n9. 53328 0.45812 0.89209 0.117 +2.8716 14 19 N. l»9. 77044 9.14394 0.23144 n9. 52992 0.46459 0.90309 0.115 +2.9147 15 21 N. R9.690U5 8.98216 0.22872 r.9. 52639 0.47179 0.84510 0.113 +2.9634 16 22 8. n9.64348 8.88902 nO. 22714 B9.52450 TiO.37736 1.00860 0.112 -2.3843 17 23 N. ny.59131 8.78468 0.22541 719.52259 0.47972 0.90849 0.111 +3.0180 18 24 S. n9. 53201 8.66608 nO. 22354 7i9. 52059 nO. 36150 1.02119 0.110 —2.2988 19 28 8. 719.14977 7.90160 nO. 21469 719.51212 nO. 32177 1.01284 0.106 -2.0978 20 29 N. n8. 96078 7.52362 0.21216 719.50983 0.50763 0.80618 0.105 +3.2183 21 1850 — Jan. 1 N. 8.76407 7.13020 0.20384 n9. 50264 0.52378 0.83251 0.101 +3.3402 22 2 S. 9.03304 7.R6814 nO.20084 7i9. 50014 B0.2o327 0.96379 0.100 —1.7917 23 3 N. 9.19790 7.99786 0.19774 7i9.49753 0.53529 0.46240 0.099 +3.4300 24 5 N. 9.41056 8.42318 0.19124 719.49214 0.54734 0.41497 0.096 +3.5265 25 6 S. 9.48742 8.57690 nO. 18785 7i9. 48937 TiO. 17751 0.83251 0.095 —1.5049 26 8 8. 9.60944 8.82094 nO. 18081 n9. 48356 nO. 12933 0.86923 0.093 —1.3478 27 10 S. 9.70461 9 01 128 nO. 17345 7i9. 47755 TiO 07266 0.91908 0.090 —1.1821 28 15 N. 9.87KJ7 9.35880 0.15391 719.46064 0.61497 0.53148 0.083 +4. 1207 29 ID N. 9.98006 9.56218 0.13739 n9. 44704 0.64466 0.17609 0.078 +4.4122 3d 26 S. 0.1 1534 9.83274 nO. 10733 719.42018 9.64464 0.59106 0.069 +0.4412 31 27 N. 0.13163 9.86532 0.10297 719.41618 0.70708 nO. 04139 0.068 +5.0943 32 29 N. 0.16250 9.92706 0.09422 n9. 40803 0.72309 9.00000 0.066 +5.2856 33 Feb. 1 8. 0.20505 0.01216 nO.08107 719.39560 0.07119 0.38021 0.062 + 1.1781 34 2 8. 0.21835 0.03876 tiO. 07669 719.39139 0.11638 0.74036 0.061 +1 .3073 35 3 N. 0.23126 0.06458 0.07231 719.38719 0.76349 nO. 00000 0.060 +5.8008 36 4 8. 0.24380 0.08966 nO. 06794 719.38394 0.19634 0.55630 0.058 +1.5716 37 5 N. 0 25599- 0.11404 0.06357 719.37875 0.77972 TiO. 14613 0.057 +6.0217 38 10 S. 0.31236 0.22658 nO. 04186 719.35728 0.38173 9.778i5 +0.052 +2.4084 5° CCXXV1 EQUATIONS OF CONDITION. FORMATION OP EQUATIONS OP CONDITION. MARS II. Equatorial, Santiago. N*. Dale. Limb. log. 6. log. C. log. e. log./. log. g. log. S. log. n. F. S. p. 1 1851.— Dec. 16 N. S. nO. 35634 0.31474 9.97918 9.99454 0.43667 0.6628 + 0.975 + 2.7332 4.60 2 N. S. nO. 35593 0.31392 0.00788 0.00468 0.45037 0.7634 1.022 2.8208 1.99 3 19 N. S. nO. 32685 0.25576 0.07199 0.00227 0.45712 0.7559 1.011 2.8650 4.24 4 N. 8. n 0.32054 0.25514 0.09695 0.01213 0.47082 0.7708 1.058 2.9568 3.60 5 N. S. nO. 33636 0.25478 0.10985 0.01523 0.47733 0.7404 1.073 + 3.0014 3.00 6 20 S. nO. 31640 0.23486 nO. 11690 nO. 44127 0.01031 nO. 53171 0.8633 1.049 — 3.4020 4.97 7 21 S. nO. 30586 0.21378 nO. 12017 «9. 57675 0.01292 nO. 02288 0.7924 1.061 — 1.0541 5.17 8 93 S. nO. 29505 0.19216 nO. 12340 0.33021 0.01528 0.15534 0.7160 1.073 + 1.4300 5.10 9 24 S. nO.27228 0.14663 nO. 12982 H9.38952 0.02938 n9. 99734 0.7853 1.145 — 0.9939 5.09 10 35 S. nO. 26054 0.12314 nO. 13289 0.42991 0.03343 0.28303 0.7324 1.167 + 1.9188 4.90 11 36 S. nO.24884 0.07974 nO. 13584 nO.22254 0.02738 nO. 39563 0.8513 1.134 — 2.4867 4.88 13 S. nO.24829 0.09864 nO. 13597 nO. 18518 0.04009 nO. 36528 0.8692 1.203 — 2.3189 4.17 13 27 S. nO. 23631 0.07468 110.13882 0.18589 0.03526 9.84924 O.b976 1.177 + 0.7067 4.91 14 2? N. 8. nO.22343 0.04892 n9. 99007 0.04193 9.75618 0.7853 1.213 0.5704 4.91 IS 39 N. S. nO. 21054 0.02314 9.44122 0.03893 0.25548 0.7324 1.197 1.8009 4.15 16 30 N. 8. n0.19C95 9.99596 0.58293 0.04354 0.72835 0.5682 1.222 + 5.3500 4.24 17 31 N. S. nO. 18303 9.96812 nO. 35732 0.05528 i»9.S66 94 0.6434 1.290 — 0.7361 4.57 18 1853.— Jan. 1 N. 8. nO. 16834 9.93874 nO. 05553 0.05449 9.59351 0.6532 1.285 + 0.3922 4.64 19 2 N. S. nO. 15361 9.90928 1)9.17493 0.05288 0.13580 0.8451 1.276 1.3671 4.89 20 4 N. 8. nO. 12210 9.84626 0.17722 0.05889 0.48093 0.5682 1.311 + 3.0264 4.46 21 5 N. S. nO. 10529 9.81264 nO. 28391 0.06491 119.58692 1.348 — 0.3863 4.50 33 6 N. 8. nO.08778 9.77762 n9. 78154 0.07072 9.97653 0.7482 1.385 + 0.9474 4.30 S3 7 N. S. nO. 06986 9.74178 ti9.39980 0.07141 n9. 97987 0.8921 1.389 — 0.9547 4.46 24 8 N. S. nO. 05173 9.70552 0.19805 0.05845 0.49178 0.8195 1.309 + 3.1030 3.91 25 N. 8. nO. 05075 9.70356 0.25607 0.07768 0.52897 0.7853 1.430 3.3804 4.14 36 9 N. 8. nO. 03139 9.66484 n9. 64444 0.07573 0.05565 0.8388 1.418 1.1367 4.66 27 10 N. 8. nO. 01071 9.62348 n9. 79134 0.07912 9.98967 0.7482 1.440 0.9765 4.86 28 11 N. 8. n9. 98856 9.57918 8.53783 0.08616 0.21997 0.7483 1.487 1.6594 3.84 29 12 N. 8. n9. 96664 9.53544 9.51772 0.07824 0.28865 0.6434 1.434 1.9438 4.83 30 N. S. n9. 96563 9.53332 9.71966 0.08910 0.33638 0.6021 1.508 2.1696 3.25 31 13 N. S. n!).!MI!H 9.48590 9.49707 0.08864 0.29487 0.6721 1.504 + 1.9718 4.65 32 14 N. 8. 119.91672 9.43550 nO. 27875 0.08790 n9. 35908 0.8261 1.499 — 0.2286 4.75 33 16 N. S. n9. 86109 9.32424 8.32838 0.08864 0.23865 0.6812 1.504 + 1.7324 4.36 34 17 N. 8. n9.83043 9.26292 8.96614 0.08786 0.26081 0.7076 1.499 1.8231 4.34 35 20 N. 8. «9. 72185 9.04576 nO. 06214 0.09272 9.82491 0.6990 1.533 0.6682 4.91 36 N. S. n9. 71970 9.04146 n9. 97197 0.10083 9.95875 0.6902 1.591 0.9094 4.65 37 21 N. S. n9. 67950 8.96106 0.24898 0.08674 0.55733 0.8325 1.491 3.6085 2.48 38 22 N. 8. 119.62923 8.86052 0.02007 0.10119 0.47076 0.4771 1.594 2.9564 4.55 39 23 N. 8. n9. 57540 8.75286 nO. 03810 0.10107 9.92978 0.62W 1.592 0.8507 4.42 40 24 N. 8. 119.51363 8.62932 nO.06153 0.10143 9.91761 0.6232 1.596 0.8272 4.96 41 25 N. S. H9.44399 8.49004 n9. 77335 0.09472 0.14713 0.3010 1.547 1.4032 4.81 42 87 N. 8. n9. 24965 8.10136 nO. 04859 0.09792 9.98650 0.6128 1.569 0.9694 4.50 43 28 N. S. l»9. 10432 7.81070 9.21827 0.10022 0.36252 0.3222 1.587 2.3042 4.30 44 29 N. S. n8. 88627 7.37460 0.24002 0.10046 0.59369 1.589 3.9236 45 30 N. S. n8.428B6 6.45978 0.17551 0.10006 0.57179 0.0414 1.585 3.7306 4.90 46 31 N. S. 8.35927 6.32060 nO. 21772 0.09902 9.79817 9.9542 1.578 0.6283 4.42 47 Feb. 1 N. S. 8.85074 7.30354 nO. 34891 0.09170 8.87448 0.0414 1.526 0.0749 4.76 48 2 N. 8. 9.08847 7.77900 9.66736 0.09675 0.45378 9.6990 1.562 2.8430 4.81 49 3 N. 8. 9.23924 8.08054 9.58614 0.09452 0.44935 0.1461 1.545 2.8142 4.50 50 7 N. S 9.56918 8.74042 0.28829 0.08662 9.84776 0.1139 1.490 0.7043 4.45 51 8 N. 8. 9.69318 8.84842 n9. 36586 0.09152 0.39669 119.7782 1.524 2.4928 4.51 53 9 N. 8. 9.67181 8.94568 0.12662 0.07895 0.61234 «9.7782 1.439 4.0958 4.09 53 N. S. 9.67499 8.95204 0.15993 0.08039 0.62440 119.9542 1.448 4.2111 2.70 54 10 N. 8. 9.71648 9.03502 n9.7931l 0.08064 0.34506 119.6990 1.450 2.2134 4.28 55 11 N. S 9.75598 9.11402 9.82236 0.07751 0.55143 nO.1761 + 1.429 + 3.5598 1.95 EQUATIONS OF CONDITION. Equatorial, Santiago — Continued. CCXXVll N°. Date. Limb. log. b. log. C. log. 6. log./. log-?. log. S. log. 71. F. S. P- 56 1852.— Feb. 11 N. S. 9.75793 9.11792 9.86064 0.07586 0.55875 nO.1461 +1.417 + 3.6203 3.23 57 13 N.S. a.t<2:fjr, 9.25396 0.1S067 0.07227 0.63856 nO.1761 1.395 4.3507 3.19 58 N. 8. 9.82747 9.25700 0.13621 0.07132 0.64343 nO.2788 1.389 4.3998 2.61 f Q 14 N.S. 9.85748 9.31702 n9.96360 0.07072 0.33943 n9.7782 1.3B5 2.1849 4.58 60 15 N.S. 9.88566 9.37338 119.32552 0.06246 0.46951 nO.OOOO 1.334 2.9479 4.58 61 16 N.S. 9.91347 9.42900 9.60692 0.06408 0.56245 nO.2553 1.344 3.6514 5.01 63 17 N. S. 9.93917 9.48040 9.94359 0.06088 0.62328 nO.3617 1.323 4.2003 5.28 63 19 N. S. 9.9?606 9.57418 0.16101 0.05257 0.69205 nO.6232 1.274 4.9210 4.52 64 20 N. S. 0.00792 9.61790 0.18808 0.04982 0.70730 nO.6128 .258 5.0969 5.01 65 21 N.S. 0.02866 9.65978 0.18258 0.04769 0.71301 nO.6232 .246 5.1643 4.90 66 22 N.S. 0.04837 9.69880 0.14264 0.04175 0.70819 nO.6434 .212 5.1073 3.62 67 23 N.S. 0.06728 9.73662 0.05910 0.03773 0.69457 nO.6902 .190 4.9495 4.77 68 24 N. S. 0.08541 9.77288 9.89807 0.03385 0.67043 nO.6628 .168 4.6820 4.77 69 25 N.S. 0.10294 9.80794 nO. 11383 0.03136 0.42899 nO.5563 .155 2.6853 4.65 70 26 N.S. 0.11973 9.84152 nO. 27103 0.02805 0.34477 nO.5315 .138 2.2119 4.65 71 27 N.S. 0.13669 9.87544 nO. 40583 0.02418 0.21275 nO.7076 1.118 1.6321 4.41 72 28 N.S. 0.15120 9.90446 0.31144 0.01723 0.79989 nO.6628 1.083 6.3080 4.20 73 N. S. 0.15205 9.90616 0.30386 0.02197 0.79864 nO.7324 1.107 6.2899 4.03 74 29 N. S. 0.16G15 9.93436 0.08303 0.01184 0.74540 nO.7243 1.056 5.5641 4.03 75 Mar. 1 N.S. 0.18082 9.96370 9.40773 0.01090 0.67370 nO.6812 1.052 4.7173 4.99 76 2 N. 8. 0.19503 9.99212 «9. 89774 0.00922 0.57751 nO.6232 1.043 3.7802 5.20 77 3 N.S. 0.20840 0.01886 nO. 27717 0.00136 0.44253 nO.5315 1.006 2.7703 4.75 78 4 N. 8. 0.22187 0.04580 0.40128 0.00171 0.86339 nO.8385 1.008 7.3011 4.34 79 6 N.S. 0.24725 0.09656 n9. 16732 9.99479 0.68639 nfl.7782 0.976 4.8572 4.40 80 7 N.S. 0.25918 0.12042 0.51424 9.98792 0.92304 nO.8751 0.946 8.3760 3.94 81 8 N. S. 0.27100 0. 14406 0.24005 9.98583 0.84296 nO.8195 0.937 6.9657 4.36 82 9 N.S. 0.28239 0.16684 9.195G2 9.98104 0.74025 nO.8062 0.916 5.4986 4.19 83 10 N.S. 0.29339 0.18884 nO. 17447 9.97410 0.59743 flO.6090 0.888 3.9576 3.37 84 11 N. S. 0.30452 0.21110 0.25488 9.97378 0.86815 ii I. (Ill W 0.886 7.3817 4.60 85 12 N.S. 0.31460 0.23166 8.60531 9.96321 0.75803 nO.9494 0.844 5.7284 3.69 86 N. S. 0.31521 0.23348 n8. 49415 9.97010 0.75410 nO.9345 0.871 5.6767 4.60 87 13 N. S. 0.32542 0.25290 nO. 27402 9.96464 0.59640 .10.9243 0.850 3.9482 4.64 88 14 N.S. 0.33562 0.27330 0.26829 9.96128 0.89274 nO.9638 0.837 7.81M 4.58 ; 89 15 N. S. 0.34550 0.29306 n9. 20303 9.95710 0.77273 nO.9191 +0.821 + 5.9255 4.82 ccxxvm EQUATIONS OF CONDITION. FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. MARS II. Equatorial, Santiago. N°. Date. Wasb.M.T Obs-d r. 2r. W0. =FrZ>A »v n. log. €. log. 8. log. n. P- 1 1851.— Dec. 16 .5671 11.84 5.655 II +O.C05 n + 3.41 II 5.91 n —2.38 0.1034 0.35583 nO.3766 4.00 3 .6104 7.70 0.02-2 0.613 0.01 5.91 1.78 0.1035 0.35588 nO.2504 1.26 3 19 .5509 10.03 2.860 0.755 2.15 6.04 1.76 0.1135 0.36150 nO.2455 4.00 4 .5803 7.87 1.522 0.756 1.15 6.04 0.66 0.11363 0.36155 7.9.8195 3.00 5 .5973 7.63 0.294 0.757 0.23 6.04 1.36 0.1136 0.36158 7.0.13J5 2.25 14 28 .5448 8.42 0.011 1.178 + 0.13 6 46 1.83 0.14174 0.37766 nO.2625 4.82 15 29 .5335 6.77 0.53] 1.209 — 0.64 6.50 0.93 0.14452 0.37927 n9.9685 3.86 16 30 .5-236 8.58 0.607 1.254 + 0.76 6.55 1.25 0.1472" 0.38088 tlO.0969 4.00 17 31 .5167 7.97 0.115 1.282 — 0.15 6.58 1.54 0.14992 0.38242 7i0.1b75 4.37 18 1852.— Jan. 1 .5304 8.45 0.326 1.317 •f 0.43 6.62 1.40 0.152)9 0.38393 nO.1461 4.50 19 2 .5136 8.74 0.444 1.348 0.60 6.66 1.48 0.15500 0.38541 nO.1703 4.57 20 4 .5072 9.15 0.770 1.404 1.08 6.73 1.32 0.15969 0.388-28 nO.1206 3.69 91 5 .5130 8.17 0.458 1.428 0.65 6.77 0.75 0.16191 0.38949 n9.8751 4.00 21 6 .5199 8.47 0.475 1.450 0.69 6.80 0.98 0.16401 0.39074 1.9.9912 3.69 23 7 .5097 9.26 0.742 1.468 + 1.09 6.83 1.32 0.16598 0.39S90 nO.1206 3.69 84 8 .4700 7.07 0.616 1.483 — 0.91 6.86 1.15 0.16781 0.39299 7Z0.0607 3.00 25 .5204 6.70 0.577 1.484 — 0.86 6.87 0.69 0.16789 0.39304 7.9.8388 3.27 SW 9 .5007 8.91 0.737 1 496 + 1.10 6.89 0.90 0.16963 0.39408 n9.9542 4.00 27 10 .51)08 8.55 0.249 1.505 0.37 6.92 1.26 0.17123 0.39503 1.0.1004 4.93 38 11 .5300 9.00 0.416 1.511 0.63 6.94 1.43 0.17280 0.39597 nO.1553 3.00 39 13 .4786 9.10 0.334 1.514 0.51 6.06 1.63 0.17415 0.39678 M0.2122 4.24 30 .5220 8.63 0.414 1.514 0.63 6.96 1.04 0.17420 0.39681 7.0.0170 2.25 31 13 .5037 8.59 0.258 1.513 0.39 6.98 1.22 0.17542 0.39754 7.0.0864 4.24 aj 14 .4899 8.73 0.267 1.509 0.40 7.00 1.33 0.17654 0.39821 nO.1206 4.70 33 16 .4747 8.76 0.494 1.490 0.74 7.03 0.99 0.17835 0.39930 n9.9956 4.24 34 17 .4649 8.87 0.653 1.476 0.96 7.04 0.83 0.17906 0.39973 7.9.9345 3.69 35 20 .4589 8.44 0.217 1.414 + 0.31 7.05 1.08 0.180-29 0.40046 nO. 0.134 4.70 X .5112 7.99 0.182 1.412 — 0.26 7.06 1.19 0.18031 0.40048 7.0.0755 4.24 37 31 .4383 9.40 0.531 1.387 •f 0.74 7.07 1.57 0. 18040 0.40053 nO.1959 1.71 38 92 .4837 9.19 0.457 1.355 -f 0.62 ' 7.07 1.50 0.18038 0.40052 7.0.1761 4.33 39 23 .4763 8.97 0.533 1.323 — 0.70 7.06 1.21 0.18020 0.40041 nO. 08-28 4.33 40 24 .4738 9.11 0.385 1.287 + 0.50 7.05 1.56 0.17986 0.40022 nO.1931 4.93 41 25 .4407 8.88 0.169 1.250 0.21 7.04 1.63 0.17939 0.39999 n0.2I22 4.64 43 27 .4463 8.64 0.660 1.166 0.77 7.02 0.85 0.17798 0.39909 n9.9294 4.50 43 28 .4570 8.87 0.834 1.120 0.93 7.00 0.94 0.17704 0.39851 B9.9731 3.86 44 29 .4608 8.07 0.204 1.075 0.23 6.98 0.87 0.17597 0.39787 7.9.9395 4.77 45 30 .4631 7.83 0.208 1.027 0.31 6.96 0.66 0.17475 0.39694 1.9.8195 5.00 46 31 .4574 8.10 0.455 0.979 0.45 6.94 0.71 0.173(1 0.39633 7.9.8513 4.33 47 Feb. 1 .4183 7.74 0.083 0.931 0.08 6.93 0.74 0.17198 0.39549 r.9.8692 4.4-J 48 3 .4519 8.18 0.370 0.879 0.33 6.90 0.98 0.17031 0.39148 1.9.9912 4.50 49 3 .4695 7.84 0.192 0.837 0.16 6.87 0.81 8.16853 0.39342 7.9.9085 4.50 50 7 .4167 7.84 0.405 0.624 0.35 6.73 0.86 0.16040 0.38860 7.9.9345 4.33 51 8 .3985 7.83 0.111 0.574 0.06 6.70 1.07 0.15810 0.38724 rtO.0294 4.46 S3 9 .3937 7.79 0.365 0.523 + 0.19 6.66 0.94 0.15566 0.38580 ..9 9731 3.69 S3 .4628 6.96 0.960 0.530 — 0.50 6.66 0.82 0. 15548 0.38569 7.9.9138 1.95 54 10 .4115 7.85 0.755 0.473 + 0.36 6.63 0.87 0.15305 0.38426 n9.9395 3.86 X 11 .4027 7.53 0.101 0.423 + 0.04 6.58 0.91 0.15041 0.38271 7.9.9590 1.26 58 .4540 7.10 0.017 0.420 — 0.01 6.58 0.53 0.15027 0.38263 7.9.7243 3.44 57 13 .3960 7.23 0.780 0.325 + 0.25 6.49 0.49 0.14483 0.37945 7.9.6902 2.35 58 .4430 7.48 0.665 0.323 0.21 6.49 0.78 0.14469 0.37938 7.9.8921 1.71 SB 14 .4049 7.30 0.672 0.277 0.19 6.45 0.66 0.14186 0.37773 U9.8195 3.86 60 15 .3705 7.55 0.501 0.23-2 0.12 6.40 1.03 0.13694 0.37604 7.0.0128 3.86 61 16 .3871 7.43 0.303 0.186 0.06 6.36 1.01 0.13578 0.37420 tiO.0043 4.50 63 17 .3859 7.03 0.269 0.141 0.04 6.32 0.67 0.13260 0.37237 7.9.S261 4.97 63 19 .3683 6.83 0.004 + 0.055 + 0.00 6.22 -0.61 0.12609 0.36663 7.9.7853 3.77 EQUATIONS OF CONDITION. Equatorial, Santiago — Continued. ccxxix N'. Date. Wash. M. T. Obs'd T. 2r. Wo- =FrA*.- rv. n. logC. log.S. log. U. P- it ii ,, /* II 64 1852.— Feb. 20 .3682 6.86 0.417 + o.ou + 0.01 6.17 —0.68 0.12270 0.36670 t?9.8325 4.50 65 21 .3740 6.86 0.589 — 0.027 — 0.02 6.13 0.75 0.11924 0 36473 (19.8751 4.33 66 • .3561 6.79 0.538 0.066 0 04 6.08 0.75 0.11583 0.36279 n9.8751 2.67 67 23 .3510 6.22 0.626 0.104 0.07 6.03 0.26 0.11226 0.36078 n9.4150 4.13 68 24 .3469 6.70 1.027 0. 142 0.15 5 98 0.85 0.10867 0.35876 119.9294 4.13 M 25 .3193 6.50 0.554 0.178 0.09 5.93 0.66 0.10502 0.35671 n9.8195 4.24 70 25 .3485 6.59 0.571 0.213 0.12 5.88 0.83 0.10135 0.35466 ii!l.!ll!ll 4.34 71 27 .3960 6.53 0.533 0.249 0.13 5.82 0.84 0.09745 0.35248 n9. 92-13 3.86 72 28 .3290 6.60 0.356 0.280 0.10 5.78 0.93 0.09395 0.35054 (19.9685 3.50 73 .384-2 6.33 0 275 0.282 0.08 5.77 0.64 0.09375 0.35043 (19.8062 3.27 74 29 .3210 6.08 0.173 0.311 0 05 5.73 0 40 0.09020 0.34847 .ill 6021 3.27 75 Mar. 1 .3288 6.24 0.266 0.343 0.09 5.68 0.65 0.08637 0.34636 (19.8129 4.75 76 2 .3370 6.37 0.151 0.373 0.05 5.63 0.79 0.08251 0.34424 wii.MiTt; 5.14 77 3 .3171 6.21 0.251 0.402 0.10 5.58 0.73 0.07874 0.34218 B9.8633 4.33 78 4 .3347 5.89 0.457 0.431 0.20 5.53 0.56 0.07480 0.34004 n9.7482 4.13 79 6 .3411 5 90 0.426 0.487 O.S1 5.43 0.68 0.06700 0.33582 «9.8325 4.21 80 T .3246 6.06 0.437 0.514 0.22 5.38 0.90 0.06316 0.33376 .19.9542 3.50 81 8 .3274 5.86 0.474 0.540 0.26 5.33 0.7U 0.05924 0 33166 119.8976 4.34 82 9 .3192 5.90 0.082 0.565 — 0.05 5.38 0.67 0.05535 0.92959 n9.8361 3.93 83 10 .3031 6.99 0.027 0.590 •f 0.02 5.34 1.73 0.05149 0.32743 nO.2380 2.83 84 11 .3225 5.77 0.312 0.615 — 0.19 5.19 0.77 0.04748 0.32542 n9.8865 4.42 85 12 .2890 5.b4 0.100 0.639 — 0.06 5.14 0.76 0.043C8 0.32342 (19.8808 3.00 86 .3273 5.98 0.107 0.640 + 0.07 5.14 0.77 0.04353 0.32334 (19.8865 4.41 87 13 .3111 5.51 0.346 0.663 — 0,23 5.09 0.65 0.03968 0.32132 n9.8129 4.50 88 14 .3157 5.64 O.S79 0.687 0.19 5.05 0.78 0.03573 0.31926 H9.8921 4.39 89 15 .3128 5.57 0.238 — 0.710 — 0.17 5.00 —0.74 0.0318.! 0 31723 n9.8S92 4.80 FORMATION OF EQUATIONS OF CONDITION. MARS II. Meridian, Santiago. IT. Date. Limb. log. b. log. C. log. 6, log. g. log. S. log. n. &. 8. 1 1851.— Dec.19 8. nO. 32615 0.35436 nO. 11378 0.01665 nU.7fif.i-!! 0.8976 + 1.080 — 0.5833 3 31 S. nO.3cl.VM 0.21250 nO. 12038 0.02396 n9.8l351 0.8692 1.117 0.6509 3 22 S. nO. 29437 0.19080 nO. 12362 0.02760 «9. 83347 0.9494 1.136 0.6815 4 24 S. nO.27180 0.14566 nO. 12995 0.03478 (19.86729 0.7993 1.174 0.7367 5 25 S. n«, 26007 0.12220 nO. 13303 0.03831 (19.88150 1.0128 1.193 0.7612 6 26 S. nO. 24801 0.09808 n0.13G06 0.04182 n9. 89409 0.9085 1.213 0.7836 7 27 S. nO. 23560 0.07326 nO. 13901 0.04526 n9. 90531 0.9294 1.232 0.8041 8 28 8. nO. 22389 0.04984 nO. 14190 0.04865 •19.91408 0.9494 1.251 0.8205 9 30 S. nO. 19613 9.99432 nO. 14745 0.05528 n9. 95064 0.7709 1.290 0.8524 10 31 S. nO.18212 9.96630 nO. 15011 0.05849 (19.93671 0.6990 1.309 — 0.8644 U 1852.— Jan. 1 N. nO. 16745 9.93696 0. 15268 0.06264 0.59890 nO.3424 1.334 •f 3.8710 12 3 N. nO. 15269 9.90744 0.15516 0.06471 0.59955 0.56P2 1.347 3.9769 13 4 N. nO. 12112 9.84430 0.16177 0.07065 0.60259 0.3424 1.385 4.0049 14 5 N. n0.104<3 9.81093 0.16389 0.07308 0.60389 1.0212 1.400 + 4.0169 15 6 S. nO. 08707 9.77620 nO. 16422 0.07606 n9. 95080 0.8195 1.419 — 0.8929 16 7 S. nO. 06899 9.74004 nO. 16779 0.07865 (19.95216 0.8325 1.438 — O.F957 17 8 N. nO. 05013 9.70232 0. 16797 0.08118 0 60844 0.7404 1.453 4- 4.0592 18 9 S. nO. 03054 9.66314 nO. 16972 0.08154 (19.94655 0.8261 1.456 — 0.8849 19 10 N. nO. 00976 9.62158 0.17134 0.08581 0.61258 0.7076 1.485 -f- 4.0979 20 11 N. ti9. 98807 9.57820 0.17285 0.08794 0.61479 0.4771 + 1.499 + 4.1190 ccxxx EQUATIONS OF CONDITION. Meridian, Santiago — Continued. N« Date. Limb log. &. log. C. log. e. log. g. log. S. log. H. it2. S. 21 1852.-Jan. 12 S. n9. 96524 9.53354 nO. 17423 0.08993 n9. 92727 0.8129 + 1.513 — 0.8458 33 13 N. n9.94105 9.48435 0.17547 0.09183 0.61965 0.3424 1.526 + 4.1653 23 14 8. n9. 91564 9.43334 nO. 17658 0.09353 •19.91046 0.8388 1.539 — 0.8137 94 15 N. n9. 88754 9.37714 0.17756 0.09516 0.62486 0.4624 1.550 + 4.2165 as 16 S. n9. 85965 9.32136 ,10.17840 0.09658 n9. 88829 0.3424 1.560 — 0.7732 98 17 N. n9. 82868 9.25942 0.179C9 0.09790 0.63053 0.2041 1.570 •f 4.2710 97 18 8. n9. 79534 9.19274 nO. 17964 0.09902 n9. 86004 0.8261 1.578 — 0.7245 96 19 N. n9.75923 9.12052 0.18005 0.10003 0.63653 0.8921 1.585 + 4.3303 99 20 N. 119.71984 9.04174 0.18030 0.10086 0.63964 0.0000 1.591 4.3615 30 21 N. n9. 67652 8.95510 0.18041 0.10153 0.64284 O.OOCO 1.596 4.3938 31 22 3. ,19.62839 8.85884 nO. 18037 0.10205 «9. 78017 0.9085 1.600 0.6028 39 23 N. n9. 57425 8.75056 0.18018 0.10258 0.64950 719.8451 1.604 -f- 4.4617 33 21 S. ,19.51241 8.62668 nO. 17985 0.10254 n9. 72411 0.1761 1.603 — 0.5298 34 25 N. ,19.44026 8 48358 0.17936 0.10256 0.65634 719.0000 1.603 •f 4.5325 35 27 N. n9.24545 8.09293 0.17794 0 10209 0.66349 nO.2041 1.601 + 4.6078 36 28 S. n9. 10096 7.80398 nO. 18000 0.10159 (19.56808 0.6812 1.597 — 0.3699 37 29 N. n8.88289 7.36784 0.17595 0.10096 0.67090 0.3424 1.592 + 4.6871 38 30 S. n8. 42415 6.45036 nO. 17474 0.10015 ,19.41847 n9.6021 1.586 — 0.2621 39 31 N. 8.36642 6.33490 0.17340 0.09921 0.67863 nO.1139 1.579 + 4.7712 40 Feb. 1 S. 8.86368 7.32942 nO. 17192 0.09809 ,19.19018 ti9.7789 1.571 — 0.1571 41 2 N. 9.08945 7.78096 0.17030 0.09683 0.68652 nO.1761 1.562 + 4.8587 49 3 S. 9.23794 8.07654 nO. 16856 0.09539 n8. 64345 nO.7076 1.551 — 0.0440 43 4 N. 9.34731 8.29668 0.16669 0.09383 0.69473 9.0000 1.541 •f 4.9514 44 7 S. 9.57046 8.74298 nO. 16036 0.08829 9.31387 0.1461 1.502 0.2060 45 8 S. 9.62506 8.85218 nO. 15802 0.08618 9.43696 n9.0000 1.487 0.2735 48 9 N. 9.67355 8.94916 0.15557 0.08395 0.71640 nO.0414 1.472 5.2047 47 10 8. 9.71716 9.03638 nO. 15300 0.08154 9.61731 •19.6990 1.455 0.4143 48 11 N. 9.75680 9.11566 0.15036 0.07910 0.72552 nO.3617 1.440 5.3152 49 13 N. 9.82663 9.25532 0.14477 0.07378 0.73494 •19.3010 1.405 5.4317 90 14 N. 9.85776 9.31758 0.14183 0.07096 0.75875 9.0000 1.387 5.4922 51 15 N. 9.88678 9.37562 0.13884 0.06806 0.74464 nO.1461 1.368 5.5544 53 16 S. 9.91399 9.43004 nO. 13572 0.06501 9.94655 nO.4914 1.349 0.8842 53 17 N. 9.93961 9.48128 0.13255 0.00191 0.75459 nO.5798 1.329 5.6832 54 18 8. 9.96379 9.59964 nO. 12930 0.05669 0.02386 nO.4150 1.310 1.0565 55 19 N. 9.98670 9.57546 0.12601 0.05541 0.76483 nO.8751 1.290 5.8187 56 20 8. 0.00847 9.61900 nO. 12361 0.05214 0.09237 nO.6335 1,272 1.2370 57 21 N. 0.02919 9.66044 0.11918 0.04862 0.77534 nO.7243 l.Q.H 5.96IS 68 23 N. 0.04897 9.70000 0.11569 0.04512 0.78070 TiO.7076 1.531 6.0353 59 23 N. 0.06789 9.73784 0.11215 0.04153 0.78610 •10.6233 1.211 6.1109 60 24 8. 0.08609 9.77410 nO. 10856 0.03789 0.20968 nO.3617 1.191 1.6206 61 25 N. 0.10343 9.80892 0.10492 0.03422 0.79714 nO.9294 1.170 6.2682 62 96 8. 0.12016 9.84238 nO. 10112 0.03045 0.96119 •ifl.6335 1.151 1.8247 63 27 N. 0.13627 9.87460 0.09754 0.02667 0.80840 nO.7993 1.18] 6.4329 64 98 8. 0.15182 9.90570 nO. 09389 0.02281 0.30870 nO.5563 1.111 2.0361 65 99 N. 0.16682 9.93570 0.09003 0.01896 0.81991 nl.1461 1.091 6.6056 66 P7 68 69 70 Mar. 1 2 3 4 6 N. N. N. N. N. 0.18132 0.19536 0.20895 0.29313 0.24736 9.96470 9.99278 0.01996 0.04633 0.09678 0.08623 0.08242 0.07858 0.07472 0.06697 0.01509 0.01103 0.00709 0.00307 9.99498 0.82574 0.83162 0.83757 0.84355 0.85566 nO.3802 nl.0792 nO.9031 nO.8513 nO.9294 1.072 1.052 1.033 1.014 0.977 6.6948 6.7862 6.8797 6.9752 7.1723 71 79 73 74 75 7 8 9 10 11 8. N. 8. N, 8. 0.25943 0.27119 0.28264 0.29379 0.30467 0.12092 0.14444 0.16734 0.18964 0.21140 nO. 06307 0.05917 nO.05596 0.05134 ,1(1.111743 9.99087 9.98680 9.98266 9.97854 9.97438 0.47148 0.86793 0.50683 0.88035 0.54046 nO.5185 nO.9294 nO.8129 uO.7708 nO.7993 0.959 0.941 0.923 0.906 0.889 2.9613 7.37-i9 3.2124 7.5918 3.4711 76 77 78 79 19 13 14 15 ~ ' N. 8. N. 8. 0.31538 0 33564 0.33575 0.34564 • 0.23562 0.25334 0.27356 0.29334 — . 0.04351 nO. 03959 0.03568 nO. 03179 — • - 9.97033 9.96605 9.96189 9.95771 0.69289 0.57264 0.90555 0.60343 nO.9912 •ifl.9243 nO.9731 H0.86U2 0.872 O.a55 0.839 + 0.823 7.8143 3.7380 8.0455 -f 4.0126 EQUATIONS OP CONDITION. CCXXX1 FORMATION OF SUPPLEMENTARY EQUATIONS OF CONDITION. ni \ its n. Meridian, Santiago. N°. Date. Limb. log. b. log. C. log. 6. log. g. Ing. S. log. U. W. 6'. 1 1851.— Dec 21 8. 1.0.30522 0.21250 ..0.12038 0.02396 n9. 81351 0.8573 •f 1.117 — 0.6509 3 23 S. nO.29437 0.19080 r.0. 12362 O.OB760 i>9. 83347 0.4914 1.136 0.6815 3 26 a. nO. 24801 0.09808 nO. 13606 0.04182 i.9.t9409 0.8388 1.212 0.7836 4 27 s. nO. 23560 0.07326 nO. 13901 0.04526 n9. 90531 0.5315 1.232 0.8041 5 30 s. iiO. 19613 9.99432 1.0.14745 0.05528 J.9. 93064 0.7634 1.290 0.8524 6 31 a. nO. 18212 9.96630 nO. 15011 0.05849 n9. 93671 0.7160 1.309 — 0.8614 7 18J2.-Jan. 1 N. nO. 16745 9.93696 0.15268 0.06264 0.59890 nO.5051 1.334 + 3.9710 6 4 N. nO. 12112 9.84430 0.16177 0.07065 0.60259 0.5911 1.385 4.0049 9 5 N. nO. 10443 9.81092 0.16389 0.07308 0. 60389 0.9243 .400 4.0169 10 10 N. nO.00976 9.62158 0.17134 0.08581 0.61256 0.8388 .485 -f. 4.0979 11 16 S. n9. 85965 9.32136 n6. 17840 0.09658 n9. 88829 0.7404 .560 — 0.7732 12 17 N. n9.82c68 9.25942 0.17909 0.09790 0.63053 0.6335 .570 + 4.2710 13 25 N. ii9.44026 8.48258 0.17936 0.10256 0 65634 i.o.o no .603 4.53S5 14 27 N. n9.24545 8.09296 0.17794 0.10209 0 66349 0.6021 .601 + 4.6078 15 Feb. 1 S. 8.86368 7.32942 1.0.17192 0.09809 119.19618 0.2041 .571 — 0.1571 16 2 N. 9.08945 7.78096 0.17030 0.09682 0.68653 nO.0414 .562 -f 4.8587 17 4 N. 9.3-1731 8.29668 0.16069 0.09383 0.69473 9.4771 .541 4.9514 18 8 S. 9.62506 8.85218 nO. 15802 0.08618 9.43696 n9.3010 .487 0.2735 19 9 N. 9.67355 8.94916 0.15557 0.08395 0.71640 1.9.4771 472 5.2047 20 18 S. 9.96379 9.52964 nO. 12930 0.05869 0.02386 9.6021 .310 1.0565 21 19 N. 9.98670 9.57546 0.12601 0.05541 0.76483 nO. 4914 1.290 5.8187 22 20 8. 0.00847 9.61900 1.0.12261 0.05214 0.09237 nO.5563 1.272 1.2370 23 21 N. 0.02919 9.66044 0.11918 0.04862 0.77534 !in.9->94 1.251 5.9613 24 Mar. 12 N. 0.31528 0.23262 0.04351 9.97023 0.89289 nl. 0086 0.872 7.8143 25 13 a. 0.32564 0.25334 nO. 03959 9.96605 0.57264 tiO.9191 0.855 3.7380 36 14 N. 0.33575 0.27a56 0.03568 9.96189 0.90555 nO.9138 0.839 8.0455 27 15 s. 0.31564 0.29334 nO. 03179 9.93771 0.60343 110.9031 + 0.823 + 4.0126 FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. (FttOM DIRECT MEASUREMENT OF DIAMETEBS.) MA US II. Meridian, Santiago. N°. Date. Wash. M. T. Obs'd T. r*i n. log. 6. log. 8. log. H. 37 1852 — January 29 .4727 n 8.10 // 6.99 n — 1.11 0.17595 0.39785 nO.0-153 38 30 .4689 7,95 6.U7 0.98 0.17474 0.39712 «9.9913 39 31 .4650 7.55 6.95 0.60 0.17340 0.39633 «9.778a 47 Febru'y 10 .4278 7.00 6.62 — 0.38 0.15300 0.38483 1.9.5798 FORMATION OF EQUATIONS OF CONDITION. M \ US II. Equatorial, Washington. N'. Date. Limb. log. b. log. C. log. g. log. S. log. n. jfc2. 8. P- 1 1852.-Jan. 24 N.S. n9. 51690 8.63586 n9. 66275 9.40552 0.2041 +0.212 +O.S544 3.93 2 26 N.S. ti9. 36013 8.32232 n9. 65705 9.52866 0.206 0.3378 3 3J N.S. n8.43S6* 6.47930 n9. 58689 9. 76827 0.149 0.5865 4 Feb. 3 N.S. 9.08058 7.76323 n9.61374 9.85449 9.9542 0.169 0.7153 4.31 5 3 N.S. 9.23160 8.06526 n9. 59986 9.89437 0.2304 0.158 +0.7841 4.15 CCXXXll EQUATIONS OF CONDITION. FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. MARS II. Equatorial, Washington. N". Date. Wash. M.T. Obs'd T. 2r. Wo- T^A- »V n. log. 6. log. S. log. n. P- 1 1852 Jan. 2-1 .4245 it 10.17 0.220 // + 1.288 // + 0.28 // 7.06 n —2.78 0.18003 0.40031 7i0.4440 3.14 g 20 .4169 9.64 0.260 1.209 0.31 7.04 3.24 0. 17905 0.39972 nO.3502 3.86 3 30 .4509 9.57 0.239 1.027 0.25 6.97 3.33 0.17533 0.39749 n0.3«74 2.67 4 Feb. SI .4(177 9.53 0.077 O.f81 0.07 6.91 2.51 0. 17039 0.39453 nO.3997 3.69 5 3 .4090 9.74 0.299 + 0.830 + 0.25 6.88 —2.58 0.16864 0.39348 nO.4116 3.86 FORMATION OF EQUATIONS OF CONDITION. MARS II. Meridian, Greemoicli. (OBSERVED CENTER, oa BOTH LIMBS.) N'. Dale. loj. I. log. C. log. g. log. 8. log. n. Jfc2. S. 1 1851.— Dec. 8 nO. 42772 0.45750 n9.79580 9.75220 n9.30103 +0.3905 +0.5652 2 26 nO.25040 0.102£6 n9. 84487 719.32695 0.74819 0.4895 —0.2123 3 1852 — J..n. 5 1,0.10775 9.81756 7.9.85804 7I9.5388S 0.81954 0.5201 0.3458 4 7 nO.07260 9 74726 7i9. 85916 n9.-,3920 0.77815 0 5228 0.3461 5 9 nO. 03435 9.67076 7i9. 85961 719.52840 0.86923 0.5239 0.3376 6 20 n9. 72785 9.05776 n9.8524l 719.12090 0.57978 0.5068 0 1321 7 22 n9.63826 8.87858 n9.84938 n8. 82020 0.62325 0.4998 0.0661 8 23 719.58541 8.77288 «9.84770 n8. 47567 0.76343 0.49o9 —0.0299 9 28 n9. 13333 7.868T2 719.83752 9.26387 0.59106 0.473-3 +0.1836 10 29 r.8. 93513 7.47232 n9. 83517 9.36680 0.41497 0.4681 0.2327 11 30 n8.56015 6 72236 ti9. 83274 9.45301 0.39794 0 4629 0.2838 12 Feb. 3 9 21196 8.02598 n9. 82220 9.70706 9.95424 0.4410 0.5094 13 6 9.49464 8.59134 7i9.81355 9.84528 9.30103 0.4237 0.7003 14 9 9.66445 8.93096 n9. 80438 9.95890 7i9.60206 0.4062 0.9097 15 10 9.70893 9.01996 n9. 80121 9.99277 n9. 47712 0.4004 0.9835 16 11 9.74930 9.10066 7i9. 79805 0.02507 ti9. 95424 0.3945 1.0594 17 14 9.85182 9.30570 719.78827 0.11361 nO. 32222 0.3772 1.2990 18 18 9.95915 9.52036 1,9.77484 0.21648 710.20412 0.3546 1.6462 19 20 0.00428 9.61062 719.76802 0.26286 710.65321 0.3430 1.8317 20 26 0.11693 9.83592 719.74742 0.38657 nO. 74819 0.3125 2.4354 21 28 0.14881 9.89968 719.74057 0.42359 TiO. 72428 0.3028 2.6521 22 Mar. 2 0.192G4 9.98734 H9.73038 0.47596 nO. 73239 0.2889 2.9920 23 3 0.20632 0.01470 719.72701 0.49263 nO. 70757 0.2845 3 1091 24 4 0.21957 0.04120 7i9. 72305 0.5U900 nO. 81X518 0.2801 3.22*3 25 5 0.23345 0.06696 n9. 72033 0.52496 710.72428 0.2758 3.3493 26 6 0.24495 0.09196 n9. 71701 0.54062 nO. 85126 0.2717 3.4723 27 8 0.26892 0.13999 n9. 71045 0.57102 nO. 86923 0.2636 3.7241 28 9 0.28042 0.16290 7i9.70719 0.58578 nO. 82607 0.2612 3.8528 29 12 0.31322 0.22850 719.C9757 0.62818 nO. 86332 0.2484 4.2509 30 17 0.36293 0.32790 7i9.682l7 0.69186 nU. 90849 0.2314 4 .KM 31 18 0.37352 0.31650 nil. 67918 0.70751 Tifl. 98677 0.2282 5 0992 32 20 0.390S3 0.38252 7i9.67331 0.73229 Til). 94448 9.BK 5 3975 33 22 0.40752 0.41710 719.66780 0.75613 1.0.91903 0.2168 5.7032 34 23 0.4159-} 0.43390 n9. 66477 0.76785 nil 88649 0.2130 5.859-1 H 25 0.43224 0.46651 •i9.6V.M4 0.79078 nO. 95904 0.2082 C.1770 30 27 0.44796 0.49798 •a9 C5389 O.«1306 nO.99564 0.2031 +6.5021 EQUATIONS OF CONDITION. CCXXX1U FORMATION OF EQUATIONS OF CONDITION. MARS II. Meridian, Cape of Good Hope. (OBSERVED CENTER.) N°. Date. log. b. log. C. log. g. log. S. log. n. k2. 8. I 1851— Dec. 23 iiO. 29707 0.19620 0.02949 0.21998 0.60959 1.15 +1.6595 3 26 nO. 25102 0.10410 0.04369 0.20252 0.57634 1.22 1.5941 3 29 nO. 21298 0.02802 0.05389 0.19474 0.54654 1.28 1.5658 4 30 nO. 19951 0.00108 0.05717 0.19318 0.60206 1.30 1.5602 5 1852— Jan. 1 nO. 17127 9.94460 0.06354 0.19153 0.65225 1.34 1.5543 6 2 nO. 15644 9.91494 0.06661 0.19151 0.63043 1.36 1.5542 7 3 nO. 14107 9. '88420 0.06959 0.19195 0.47476 1.38 1.5558 8 5 nO. 10861 9.81928 0.07532 0.19451 0.50651 1.41 1.5649 9 9 nO.03537 9.67280 0.08556 0.20515 0.41830 1.48 1.6038 10 10 nO. 01494 9.63194 0.08783 0.20890 0.35793 1.50 1.6177 11 12 n9. 97100 9.54406 0.09200 0.21762 0.44091 1.53 1.6505 12 13 ti9. 94724 9.49654 0.09391 0.22259 0.52375 1.54 1.6695 13 14 n9. 92210 9.44626 0.09566 9.22789 0.50651 1.55 1.6900 14 15 ji 9. 89540 9.39-286 0.09727 0.23353 0.37291 1.57 1.7121 15 16 119.86698 9.33602 0.09875 0.23952 0.40140 1.58 1.7359 16 19 n9. 76845 9.13896 0.10225 0.25921 0.30103 1.60 1.8164 17 20 n9. 72992 9.06190 0.10311 0.26633 0.16732 1.61 1.8464 18 21 n9. 68764 8.97734 0.10384 0.27367 0.42651 1.61 1.8779 19 23 n9.64080 8.88369 0.10435 0.28122 0.07188 1.62 1.9108 20 23 n9.58829 8.77864 0.10473 0.28899 9.86923 1.62 1.9453 ai 24 n9. 52855 8.65916 0.10493 0.29693 9.11394 1.62 1.9812 22 26 n9. 37876 8.35558 0.10486 0.31338 9.70757 1.62 2.0577 23 27 n9.27484 8.15174 0.10456 0.32183 H9.79934 1.63 2.0981 M 29 n8.94785 7.49776 0.10351 0.33917 H9.51851 1.61 2.1836 25 Feb. 2 9.04355 7.68916 0.09950 0.37530 nO. 26007 1.58 2.3730 26 3 9.20509 8.01224 0.09809 0.38455 ri9. 94939 1.56 2.4241 27 4 9.33257 8.24730 0.09656 0.39391 nO. 10380 1.56 2.4769 28 5 9.41411 8.43028 0.09488 0.40324 nO. 29447 1.55 2.5307 21) 6 9.49108 8.58422 0.09307 0.41283 nO. 25768 1.54 2.5872 30 7 9.55583 8.71372 0.09112 0.42338 nO. 33646 1.52 2.6447 31 9 9.66204 8.92614 0.08682 0.44168 nO. 55991 1.49 3.7619 32 10 9.70677 9.01560 0.08447 0.45139 nO. 58433 1.48 2.8274 33 11 9.74732 9.09670 0.08201 0.46114 nO. 62014 1.46 2.8916 34 ia 9.78440 9.17086 0.07944 0.47094 nO.51455 1.44 2.9576 35 13 9.81857 9.23920 0.07675 0.48077 nO. 38021 1.42 3.0253 36 14 9.85025 9.30256 0.07395 0.49063 nO. 44248 1.41 3.0948 37 16 9.907-12 9.41690 0.06805 0.51040 nO. 60097 1.37 3.2389 38 17 9.93341 9.46888 0.06497 0.52030 nO. 69548 1.35 3.3136 39 18 9.95793 9.51792 0.06179 0.53021 nO. 68305 1.33 3.3901 40 19 9.98ll4 9.56434 0.05853 0.54014 nO. 70672 1.31 3.4685 41 20 0.00318 9 60842 0.05517 0.55008 nO. 81090 1.29 3.5488 42 21 0.02415 9.65036 0.05175 0.56001 nO. 58883 1.27 3.6309 43 93 0.06329 9.72864 0.04470 0.57985 nO. 81491 1.22 3.8006 44 24 0.08161 9.76528 0.04109 0.58977 ,.0.80510 1.21 3.8884 45 25 0.09919 9.80044 0.03741 0.59969 nO. 87622 1.19 3.9782 46 28- 0.14802 9.89810 0.02607 0.62920 nO. 90526 1.13 +4.2579 Z 6° CCXXX1V EQUATIONS OF CONDITION. FORMATION OF EQUATIONS OF CONDITION. MA US II. Meridian, Kremsmunster. (OBSERVED CENTEB.) N'. Date. log. 6. lOf.C. log. g. log. 8. log. Tl. il 8. 1 1852— Jan. 20 n9. 72943 8.06092 119.80011 n8.71850 0.00000 -f 0.398 — 0.0533 £ 34 1»9.52777 8.65760 119.79257 8.94498 0.39794 0.385 + 0.0881 3 Feb. 8 9.61282 8.82770 n9. 75141 9.96052 9.47712 0.318 0.9131 4 9 9.66261 8.92728 n9. 74818 9.99317 9.30103 0.314 0.9844 5 10 9.70728 9.01662 n9. 74494 0.02441 B. 47712 0.309 1.0578 S 24 0.08183 9.76572 n9.69755 0.36021 nO. 36173 0.248 2.2920 7 25 0.09940 9.80086 «9. 69414 0.37929 nO. 76343 0.245 2.3949 8 26 0.11628 9.83469 M9.69075 0.39789 nO. 25527 0.241 2.4997 9 Mar. 6 0.24446 0.09098 i>9.6610l 0.54786 0.43136 0.210 3.5307 10 7 0.25663 0.11532 n9. 65783 0.56288 nO. 88081 0.207 3.6549 11 8 0.26846 0.13698 n9.65466 0.57763 nO. 54407 0.304 3.7812 13 14 0.33340 0.26886 119.63630 0.66079 nl. 03743 0.187 4.5792 13 16 0.35305 0.30816 n9.63042 0.68669 nO. 88081 + 0.189 •f. 4.8606 EQUATIONS OF CONDITION. CCXXXV FORMATION OF EQUATIONS OF CONDITION. VENUS I. Equatorial, Santiago, N°. Date. Ijimb. log. b. log. C. log. 6. log./. log.gr. log. S. log. n. w. 8. P- 1 1850.-0ct. 19 N. nO. 45226 0.50658 0.24506 nO. 36914 9.91385 0.41766 0.5911 + 0.673 -{- 2.6161 5.03 3 SO N. nO. 44462 0.49130 0.25080 nO.11035 9.89115 0.55467 0.4624 0.606 3.5865 5.13 3 22 N. nO. 42872 0.45950 0.26264 0.23558 9.90385 0.81619 0.2788 0.642 6.5493 5.20 4 23 N. nO. 42059 0.44324 0.26862 nO. 45801 ' 9.90074 0.28377 0.6021 0.633 1.9221 5.39 5 24 N. nO. 41237 0.42680 0.27461 nO. 02881 9.87639 0.56272 0.5563 0.566 3.6536 5.36 6 85 N. nO. 40372 0.40950»j 0.28077 0.23646 9.94802 0.81649 0.1761 0.787 6.5537 5.04 7 86 N. nO. 39521 0.39248 0.28696 0.27582 9.89323 0.81888 0.6021 0.612 6.5899 5.15 8 29 N. nO. 36838 0.33882 0.30578 0.77372 9.85101 1.02302 nO.1139 0.504 10.5444 3.10 9 N. nO. 36782 0.33770 0.30617 0.75834 0.00090 1.02539 nO.OOOO 1.004 10.6020 3.48 10 W N. nO. 35864 0.31934 0.31246 0.53606 9.95368 0.91332 n9.6990 0.808 8.1906 3.75 11 31 N. nO. 34900 0.30006 0.31899 9.45834 S.96579 0.703% 0.0792 0.854 5.0578 3.38 12 Nov. 1 N. nO. 33931 0.38068 0.32546 0.52397 9.93019 0.90510 0.0000 0.745 8.0372 4.99 13 2 N. nO.32916 0.26038 1 0.33210 0.28396 9.96853 0.82535 0.0000 0.865 6.6888 5.13 14 4 N. nO. 30856 O.S19I8 0.34545 8.67761 9.92514 0.67451 0.1461 0.708 4.7262 4.39 IS 6 N. nO.28655 0.17516 0.35922 0.24289 9.97340 0.81552 9.9542 0.885 6.5391 4.78 16 7 N. nO. 27520 0.15246 0.36613 0.27421 9.97844 0.82551 nO.0792 0.905 6.6913 4.72 17 8 N. nO. 26356 0.12918 0.37308 0.35740 9.98672 0.85248 1.9.6990 0.941 7.1197 4.75 18 10 N. nO. 83955 0.08116 0.38699 nO. 16224 9.92688 0.51843 9.0000 0.714 | 3.2994 1.66 19 11 N. nO. 23630 0.05484 0.39435 n9. 09061 0.03273 0.68885 9.6021 1.163 4.8849 4.95 20 13 N. nO. 19984 0.00174 0.40S66 0.33949 0.02824 0.85940 n».4771 1.139 7.2346 4.98 21 14 N. nO. 18590 9.97386 0.41587 0.08180 0.06303 0.80515 0.0792 1.337 6.3848 5.05 22 15 N. nO. 17200 9.94606 0.42285 9.21139 9.98703 0.71418 n9.0000 0.942 5.1782 3.08 33 N. nO. 17154 9.94514 0.42308 9.40243 0.06865 0.73797 9.3010 1.372 5.4697 4.44 24 16 N. nO. 15674 9.91554 0.43026 nO. 16741 0.06661 0.87717 0.1461 1.359 3.7772 4.79 25 17 N. nO.14158 9.88522 0.43739 0,15851 0.04133 0.82350 H9.8451 1.210 6.6605 4.40 26 18 N. nO. 18533 9.85272 0.44474 0.25924 0.09638 0.85898 0.0792 1.559 7.8273 4.69 27 SI N. nO. 07387 9.74980 0.46613 118.84261 0.09161 0.73774 0.1761 1.525 5.4669 5.80 38 94 N. nO. 01487 9.63180 0.48724 9.54432 0.15911 0.79637 9.8451 2.081 6.2570 2.61 89 85 N. 719.99326 9.58868 0.49410 8.97081 0.18257 0.78809 n9.6021 2.318 6.1389 4.17 30 2S N. n9. 97003 9.54212 0.50099 0.42493 0.24616 0.95460 9.6990 3.107 9.0075 3.12 31 88 N. n9. 92158 9.44522 0.51380 0.34830 0.21362 0.93314 nO.0792 3.674 8.5733 4.13 33 89 N. n9. 89453 9.39112 0.52010 0.44737 0.24244 0.96955 0.5315 3.054 9.3228 1.64 33 30 N. n9. 86609 9.33424 O.S2613 0.02551 0.24467 0.88404 B9.8451 3.085 + 7.6567 4.35 34 Dec. 3 8. n9. 76708 9.13622 nO. 54287 0.20978 0.27371 «9. 64286 9.8451 3.527 — 0.4394 3.83 35 1851.— Jan. 6 8. 0.05510 9.T1226 nO. 48344 nO. 26465 0.18047 nO. 23484 0.8325 2.295 — 1.7173 3.61 36 7 S. 0.07382 9.74970 nO. 47643 9.19507 0.17018 9.58939 0.8195 2.190 + 0.3885 3.61 37 8 S. 0.09106 9.78418 nO. 46963 0.24339 0.15789 0.31865 nO.2304 2.069 2.0828 3.91 38 9 8. 0.10827 9.81860 nO. 46251 0.46683 0.15175 0.53006 nO.3617 3.011 3.3889 4.31 39 10 8. 0.12479 9.85164 nO. 45537 0.57124 0.14853 0.63587 nO.4472 1.982 4.3238 4.75 40 11 S. 0.14056 S. 88318 nO. 44824 0.61711 0.15859 0.69206 nO.6335 2.076 4.9211 4.13 41 13 S. 0.15621 9.91448 nO. 44089 0.62390 0.12823 0.70279 nO.6532 1.805 5.0441 5.11 42 14 S. 0.18558 9.97322 nO. 42634 ! 0.52892 0.10123 0.64350 nO.2304 1.594 4.4005 5.31 43 15 8. 0.19946 0.00098 nO. 41911 9.99034 0.09731 0.34033 nO.7404 1.565 2.1894 5.13 44 16 S. 0.20295 0.02796 nO. 41188 n9*. 22737 0.09001 0.05771 i.o. mi I 1.514 + 1.1421 5.00 45 17 8. 0.22605 0.05416 no. 40465 nO.lSSOS 0.08043 n8. 79099 n 0.3424 1.449 — 0.0618 4.74 46 18 8. 0.33866 0.07938 nO. 39751 0.24180 0.08232 0.53011 nO.6533 1.461 + 3.3893 4.47 47 30 8. 0.26303 0.12812 nO. 38323 n9. 77909 0.06417 0.11949 nO.5185 1.344 1.3167 4.87 48 34 g. 0.30803 0.81812 nO. 35515 0.24241 9.02619 0.62625 nO.6532 1.128 -f 4.2291 4.43 4SI X 8. 0.30890 0.25986 nO. 34144 nO. 52856 0.00847 n9.7786« nO.4150 1.040 — 0.6007 4.96 60 37 S. 0.33896 0.27898 nO. 33467 0.22290 9.99928 0.66238 nO.6721 0.997 + 4.5960 4.31 51 38 S. 0.34881 0.29968 nO. 32796 n9. 99269 9.98932 0.32033 nO.5682 0.953 2.0909 4.71 53 Feb. 5 8. 0.42038 0.44282 nO. 27670 9.68726 9.92999 0.68588 H0.5U02 0.724 4.8516 S.15 53 N. 0.42045 0.44296 0.27665 9.91190 9.91705 1.03900 nO.7243 0.682 10.9394 4.98 54 6 N. S. 0.42864 0.45934 0.08575 9.90467 0.93369 nO.6721 0.645 8.5840 5.12 55 7 N. 8. 0.43660 0.47526 — , n9. 86297 9.91007 0.83273 nO.3617 0.661 , 6.8035 4.69 66 10 N. S. 0.45984 0.52174 — n9. 29710 9.88174 0.89048 nO.6990 + 0.580 -j- 7.7710 4.79 CCXXXV1 EQUATIONS OF CONDITION. FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. VENUS t. Equatorial, Santiago. V. Dale. Wash. M.T. Obs'd T. 2r. i DA- ypcDfir r.. n. log. 6. log. S. log. n. P- 54 1851.-Feb. 6 .6627 n 17.03 0.439 n —0.700 —0.31 16.15 ti —1.32 0.27052 C. 45701 TiO.1206 5.00 55 7 .6551 16.17 0.603 0.653 —0.39 ! 15.9-2 —0.69 O.S6451 0.45312 719.8388 4.24 56 10 .6604 15 94 1.049 —0.488 —0.51 15.29 —1.25 0.24672 0.44168 nO.0969 4.24 FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. VESTUS I. Equatorial, Santiago. (FROM DIRECT MEASUREMENT OF DIAMETERS ) !»•. Date. Wash. M.T. Obs'd r. N". Obs. r0. n. tog. 6. log. 8. log, n. ~i P. 1650.— Nov. 15 .2796 23 69 5 it 22.94 — 0.75 0.42284 0.56199 7)9.8751 3.00 19 .3060 23.17 4 24.53 + 1.36 0.45194 0.58332 0.1319 2.68 Dec. 5 .3007 31,55 10 30.93 — 0.93 0.55272 0.65996 719.7959 4.00 48 1851.-Jan. 24 .6925 20.06 10 19.62 — 0.44 0.35486 0.51374 719.6484 4.00 49 26 .7000 19.88 10 19.00 — 0,88 0.34111 0.50425 719.9445 4.00 50 27 .7050 19.04 10 18.71 — 0.33 0.33431 0.49959 719.5185 4.00 51 • .6885 18.90 10 18.43 — 0.47 0.32771 0.49509 719.6721 4.00 52,53 Feb. 5 .7020 17.06 10 16.37 — 0.70 0.27639 0.46085 719.8420 4.00 54 6 .7077 16.60 10 16.14 — 0.46 0.27024 0.45684 7i9.6674 4.00 55 7 .7011 16.81 10 15.92 — 0.90 0.26424 0.45295 7i9.9518 4.00 56 10 .7087 15.84 10 15.28 — 0.56 0.24644 0.44150 7J9.7S20 4.00 FORMATION OF EQUATIONS OF CONDITION. VE1VCS I. Meridian, Santiago. N". Date. Limb. log. b. log. C. log. 6. log.y. log. S. log. n. i8. S. 1 2 3 4 5 1850.-0ct. 19 20 21 28 23 N. N. N. N. N. nO. 45409 nO. 44639 nO. 43855 nO. 43057 7i0.42245 0.51024 0.49484 0.47916 0.46320 0.44696 0.24368 0.24946 0.25535 0.26128 0.26727 9.31194 9.30937 9.30565 9.30210 9.29903 0.63852 0.63446 0.63057 0.62693 0.62358 1.11727 1.08636 0.77815 0.73239 0.84510 + 0.042 0.042 0.041 0.040 0.040 + 4.3503 4.3098 4.2714 4.2358 4.2032 6 7 e 9 10 24 25 36 27 28 N. N. N. N. N. TiO. 41416 nO. 40571 TiO. 39709 nO.3883! nO.37934 0.43088 0.41348 0.396-.24 0.37868 0.36074 0.27332 ' 0.27944 0.28562 0.29186 0.29816 9.29646 9.29450 9.29313 9.29233 9.29218 0.62046 0.61763 0.61509 0.61285 0.61091 0.92942 0.80618 0.75587 0.84510 0.039 0.039 0.039 0.038 0.038 4.1731 4.1460 4.1218 4.1007 4.0824 11 19 13 14 IS 30 31 Nov. 1 | 4 N. N. N. N. N. TiO. 36083 TiO.35126 7)0,34148 nO. 33149 nO. 31077 — ' - ill 0.32370 0.30458 0.28502 0.26504 0.22360 — •••ii i . . _ 0.31098 0.31746 0.32401 0.33064 0.34405 — • - 9.29398 9.29581 9.29835 9.30179 9.31063 0.60804 0.60701 0.60636 0.60608 0.60646 i 0.50515 0.74036 0.90849 0.56820 0.039 0.039 0.040 0.040 + 0.042 4.0555 4.0459 4.0399 4.0372 •f 4.0408 EQUATIONS OF CONDITION. VENUS I. Meridian, Santiago — Continued. CCXXXVll N'. Date. Limb. log. b. log. C. log. 6. log. g. loB. S. log. H. ». 8. 16 1850.— Nov. 5 N. nO. 30003 0.20210 0.35085 9.31623 0.60717 0.41497 + 0.043 + 4,0474 17 7 N. nO. 27771 0.15748 0.36461 9.32945 0.60963 0.76343 0.046 4.0704 18 8 N. nO. 26611 0.13428 0.37157 9.33718 0.61139 0.79239 0.047 4.0869 19 10 N. nO. 24195 0.08596 0.38563 9.35480 0.61593 0.68134 0.051 4.1298 SO 11 N. TiO. 22935 0.06076 0.39272 9.36454 0.61869 0.79934 0.054 4.1561 31 13 N. nO. 20298 0.00802 0.40700 9.38614 0.62518 0.30103 0.059 4.2187 22 14 N. nO. 18918 9.98042 0.41419 9.39776 0.62892 0.49831 0.062 4.2552 S3 15 N. nO. 17492 9.95190 0.42140 9.40992 0.63290 0.88081 0.066 4.2944 24 16 N. nO. 16019 9.92244 0.42861 9.42273 0.63730 0.75587 0.070 4.3381 35 17 N. nO. 14493 9.89192 0.43584 9.43609 0.64193 0.44716 0.074 4.3846 26 18 N. nO. 12910 9.86026 0.44306 9.44991 0.64683 719.77815 0 079 4.4342 27 19 N. nO. 11271 9.82748 0.45025 9.46401 0.65196 0.62325 0.085 4.4870 28 20 N. nO. 09566 9.79338 0.45742 9.47862 0.65733 0.51851 •.091 4.5429 29 21 N. TI». 07792 9.75790 0.46456 9.49357 0.66298 0.66276 0.097 + 4.6023 30 33 8. nO. 04011 9.68228 nO. 47865 9.52358 nO. 51751 0.14613 0.111 — 3.2924 31 26 N. H9.97644 9.55494 0.49917 9.57266 0.69387 0.41497 0.140 -f- 4.9417 33 27 N. n9. 95293 9.50792 0.50577 9.58931 0.70050 0.30103 0.151 5.0177 33 28 N. 7i9. 92811 9.45828 0.51223 9.60587 0.70729 0.69897 0.163 5.0968 34 30 N. ..I). 1)01811 9.40584 0.52460 9.63925 0.71926 0.47712 0.190 5.2391 35 Dec. 3 N. r>9. 81165 9.22536 0.53615 9.67262 0.73458 0.49136 0.221 5.4273 36 4 N. n9. 73916 9.08038 0.54664 9.70557 0.74819 0.63347 0.258 5.6000 37 5 N. 719.69781 8.99768 0.55145 9.72182 0.75494 0.59106 0.271 5.6878 SB 8 N. i>9.54316 8.68838 0.56382 9.76895 0.77450 0.49136 0.345 5.9497 39 10 N. n9. 39742 8.39690 0.57014 9.79848 0.78878 0.75587 0.395 6.1205 40 (12) N. n9. 17649 7.95504 0.57471 9.82605 0.79829 0.81291 0.449 -f 6.2847 41 (13) S. 7i9. 00156 7.60206 nO. 57622 9.83811 nO. 50195 0.51851 0.474 — 3.1765 43 21 S. 9.54131 8 68468 nO. 56888 9.92114 nO. 39366 0.74819 0.695 2.4755 43 22 S. 9.59926 8.80058 nO. 56574 9.92620 nO. 37562 0.20412 0.711 2.3748 44 29 S. 9.87279 9.34764 nO. 53348 9.93853 nO. 19835 0.56820 0.7J4 1 .5789 45 31 S. 9.92714 9.45634 nO. 52168 9.93539 nO. 12424 0.70757 0.744 1.3313 46 1851 .-Jan. 5 S. 0.03942 9.68090 nO. 48901 9.91822 n9. 83270 0.686 0.6803 47 6 S. 0.05877 9.71960 nO. 48209 9.91208 n9. 73926 0.667 0.5486 48 7 8. 0.07729 9.75664 nO. 47509 9.90651 n9. 61690 9.60206 0.650 0.4139 49 8 8. 0.09504 9.79214 nO. 46801 9.90055 n9. 44436 0.633 0.2782 50 9 8. 0.11211 9.82028 nO.46087 9.89421 n9. 14983 0.07918 0.614 0.1412 51 10 S. 0.12854 9.85914 nO. 45376 9.88757 ..7.55630 9.90309 0.596 — 0.0036 53 11 S. 0.14437 9.89080 nO.44648 9.88058 9.13354 0.38021 0.577 •f 0.1360 53 12 S. 0.15964 9.92134 nO. 43925 9.87337 9.44107 719.95424 0.558 0.2761 54 13 S. 0.17439 9.95084 nO. 43200 9.86586 9.62066 9.60206 0.539 0.4175 55 14 S. 0.18866 9.97938 nO. 42475 9.85812 9.74796 9.84510 0.520 0.5597 • 56 15 S. 0.20248 0.00702 nO. 41751 9.85021 9.84730 9.47712 0.502 0.7034 57 16 8. 0.21587 0.03380 nO. 41028 9.84210 9.92834 9.84510 0.483 0.8479 58 17 8. 0.22886 0.05978 nO. 40307 9.83382 9.99730 9.77815 0.465 0.9938 59 20 8. 0.26567 0.13340 «». 38163 9.80829 0.15791 nO 32222 0.414 1.4385 60 21 8. 0.37728 0.15662 nO. 37456 9.79958 0.20115 nO. 00000 0.397 1.5891 61 22 8. 0.28858 0.179-22 nO, 36754 9.79084 0.24075 TiS.OOOOO 0.382 1.7408 63 23 8. 0.29961 0.20128 nO. 36571 9.78720 0.27286 nO. 43136 0.375 1.8744 63 24 8. 0.31035 0.22276 nO. 35365 9.773*3 0.31158 nO.27875 0.352 2.0492 64 25 S. 0.32084 0.24374 nO. 34679 9.76442 0.34345 nO. 518.11 0.338 2.2052 65 36 8. 0.33108 0.26422 nO. 33998 9.75557 0.37342 7i9. 77815 0.324 2.3628 66 27 8. 0.34109 0.28424 nO. 33323 9.74679 0.40170 nO. 23045 0.312 3.5217 67 28 S. 0.35087 0.30380 n0.32S55 9.73805 0.42848 n9. 77815 0.299 2.6821 68 Feb. 3 e. 0.40536 0.41278 nO.28781 9.68717 0.56538 0.00000 0.237 3.6760 69 5 a. 0.43210 0.44626 nO. 27541 9.67111 0.60431 0.00000 0.220 4.0208 70 6 a. 0.43024 0.46254 710.26933 9.66339 0.62277 n9. 60206 0.212 4.1954 71 7 a. 0.43823 0.47852 nO.36329 9.65570 0.64066 0.27875 0.805 4.3718 73 10 8. 0.46134 0.52474 nO.24976. 9.63813 0.69001 • .55630 •f 0.189 + 4.8979 CCXSXV111 EQUATIONS OP CONDITION. FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. VESTUS i. Meridian, Santiago. (FROM DIRECT MEASUREMENT OF DIAMETERS.) w>, Date. Wash. M.T. Obs'd r. r,. ft. log. 6. log. S. log. n. 1 1850.— Oct. 19 .0986 tt 14.94 it 15.18 // -f 0.24 0.24368 0.43975 9.3802 2 20 .0985 14.87 15.39 + 0.52 0.24946 0.44343 9.7160 3 21 .0984 15.64 15.59 — 0.05 0.25535 0.44721 n8.6990 4 22 .0983 15.64 15.81 + 0.17 0.26128 0.45103 9.2304 5 23 .0981 15.92 16.03 • .11 0.26727 0.45491 9.0414 6 24 .0979 15.64 16.25 0.61 0.27332 0.45885 9.7853 7 25 .0977 15.78 16.48 O.TO 0.27944 0.46285 9.8451 8 26 .0975 15.78 16.72 0.94 0.28562 0.46691 9.9731 9 27 .0971 15.78 16.96 1.18 0.29186 0.47103 0.0719 11 30 .0960 16.61 17.73 1.11 0.31098 0.48377 0.0473 13 Nov. 1 .0950 16.61 18.27 •f 1.65 0.32401 0.49258 0.2188 16 5 .0924 19.69 19.43 — 0.26 0.35085 0.51097 7i9.4150 17 7 .0907 19.06 20.06 + 1.00 0.36461 0.52053 0.0000 18 8 .0898 19.83 20.38 •f 0.55 0.37157 0.52540 9.7404 19 10 .0876 21.22 21.05 — 0.17 0.38562 0.53530 n9.2430 20 11 .0865 31.36 21.40 + 0.16 0.39272 0.54035 9.2175 21 13 .0839 21.78 22.11 0.32 0.40700 0.55058 9.5119 23 14 .0824 22.34 22.48 0.14 0.41419 0.55574 9.1461 24 16 .0793 22.76 23.24 0.48 0.42861 0.56620 9.6812 23 17 .0776 22.27 23.63 1.36 0.43584 0.57147 0.1335 26 18 .0757 23.73 24.03 0.29 0.44306 0.57676 8.4698 27 19 .0738 23.73 24.43 0.69 0.45025 0.58207 9.8420 28 20 .0717 24.29 24.84 0.54 0.45742 0.58737 9.7364 29 21 .0696 25.06 25.25 + 0.18 0.46456 0.59267 9.2672 30 23 .0649 26.46 26.08 — 0.38 0.47865 0.60321 ii9.5855 31 26 .0562 20.46 27.34 + 0.87 0.49917 0.61870 9.9420 32 27 .0541 26.67 27.72 1.05 0.50577 0.62373 0.0212 33 28 .0511 27.16 28.18 1.02 0.51223 0.62865 0.0086 35 Dec. 2 .0379 29.74 29.77 0.03 0.53615 0.64707 8.4771 36 4 .0305 29.18 30.50 1.31 0.54664 0.65521 0.1189 37 5 .0267 30.46 30.84 0.38 0.55H5 0.65896 9.5798 38 8 .0146 30.86 31.74 + 0.88 0.56382 0.66865 9.9445 3U 40 10 .0060 32.53 32.19 — 0.34 0.57014 0.67362 n9.5378 12 .9973 32.53 32.53 — 0.00 0.57471 0.67723 n7.6990 41 13 .9928 31.83 32.65 •f 0.81 0.57622 0.67842 9.9119 EQUATIONS OF CONDITION. CCXXX1X FORMATION OF EQUATIONS OF CONDITION. VENUS I. Equatorial, Washington. (OBSERVED BOTH LIMBS.) »•• Date. log. b. log. C. log. g. log. 8. log. n. It? S. P- 1 1850.— Oct. 19 nO.45285 0.50776 nO. 13267 nO.1761 +1.841 +0.0252 3.33 ( 8.40140 i 3 21 nO. 43724 0.47654 nO. 14762 1 n9. 16316) nO.5798 1.974 —0.1456 3.54 3 22 nO. 42936 0.46078 nO. 16277 ,,9.40329 0.5682 3.117 0.2531 3.61 4 28 nO. 37795 0.35796 nO. 19912 n9. 83841 0.6434 2.503 0.6893 3.10 5 NOT. 1 nO. 34004 0.88214 nO. 23012 «9. 98753 0.6021 2.887 0.9717 3.50 6 2 nO.33003 0.26213 nO. 23918 nO. 01870 0.5682 3.009 1.0440 4.28 7 9 nO.25243 0.10692 nO. 28539 nO. 15791 0.4914 3.721 1.4385 3.07 8 10 nO. 24029 0.08264 nO. 30309 nO. 18731 9.3010 4.038 1.5389 2.78 9 13 nO.20097 0.00400 nO. 31305 nO. 21357 0.5563 4.227 1.6352 3.43 10 14 nO. 18716 9.97638 nO. 32269 nO.22889 0.2553 4.430 1.6939 3.44 11 31 7,0.07320 9.75246 nO. 36674 nO. 39010 n9.0000 5.583 —1.9503 4.65 12 1851.— Jan. 13 0.17285 9.94776 nO. 31485 0. 11757 nO.9138 4.263 +1.3109 4.81 13 15 0.20084 0.00374 nO.29178 0.31450 nO.6232 3.834 1.6387 4.83 14 24 0.30913 0.32032 nO.33293 0.47549 nO.5911 +2.922 +9.9887 3.43 FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. VENUS I. Equatorial, Washington. N'. Date. Wash. M.T. obsM r. 2r. W- TrZ>t<*.- rt. n. log. e. log. 8. log. n. P- 2 1850.-0ct. 21 .2638 it 17.57 0.290 // —1.789 // —0.52 // 15.63 n —a. 37 0.35633 0.44784 nO.3747 2.67 3 22 .2482 17.03 0.017 1.676 +0.03 15.84 —1.25 0.26217 0.45160 nO.1303 1.84 4 28 .2485 17.98 0.204 0.993 —0.20 17.26 —0.83 0.29913 0.47586 119.9138 2.35 5 NOT. 1 .2415 19.25 0.500 0.553 —0.28 18.31 -1.13 0.33498 0.49334 nO.0492 2.67 6 3 .2383 30.33 0.118 . —0.444 -0.05 18.59 —1.68 0.33160 0.49774 nO.2353 3.69 7 9 .2346 33.63 0.332 +0.283 +0.09 20.74 —3.68 0.37960 0.53105 nO.4281 2.25 8 10 .3363 19.83 O.X21 0.385 +0.09 21.10 +1.25 0.38667 0.53605 0.0969 1.71 8 .2208 22.14 0.404 0.383 —0.16 21.10 —1.09 0.38656 0.53597 nO.0374 1.95 B 13 .3313 22.32 0.397 0.677 +0.20 23.17 +0.18 0.40806 0.55132 9.3553 3.67 10 14 .3259 22.73 0 211 0.774 +0.16 22.54 —0.90 0.41523 0.55649 719.9543 3.67 11 21 .3188 25.07 0.030 +1.444 —0.01 35.31 +0.06 0.46562 0.59347 8.7783 4.06 13 1851.— Jan. 13 .7770 34.83 0.139 —0.159 —0.03 33.47 —1.45 0.43277 0.56923 T.0.1614 4.24 13 15 .7593 24.55 0.119 -0.355 —0.04 33.70 —1.98 0.41839 0.55877 ltO.3967 4.57 14 24 .7533 30.59 0.129 +0.868 —0.11 19.60 —1.18 0.35444 0.51345 ltO.0719 2.67 ccxl EQUATIONS OF CONDITION. FORMATION OF EQUATIONS OF CONDITION. VENUS I. Meridian, Greenwich. N°. Date. Limb. log. 6. log. C. log. g. log. S. log. n. &2 «. 1 1850.— Oct. 15 8. nO. 48361 0.56938 nO.20788 n9.97763 0.55991 •f 2.605 — 0.9498 2 16 C. nO. 47642 0.5A490 7.0.21377 7.8.63043 0.63949 2.676 — 0.0427 3 21 N. nO. 43856 0.47918 nO.24384 9.71265 0.93952 3.074 + 0.5160 4 Nov. 11 N. 7.0.22905 0.06016 nO. 38264 719.98195 0.58092 5.825 — 0.9593 5 28 N. 119.92572 9.45350 nO. 49961 nO. 23505 0.85248 9.982 1.7181 1) 29 N. T.9. 89907 9.40020 nO. 50562 nO.24175 0.919L8 10.262 1.7448 7 Dec. 6 N. n9.64481 8.89168 nO.54083 nO.26423 0.83315 12.069 1.8375 8 27 0. 9.80392 9.20990 710.51795 7.0.17519 1.00432 10.862 — 1.4969 9 1851.Wan. 8 N. 0.09162 9.78530 nO. 43816 0.04230 9.64345 7.522 + 1.1023 10 17 N. 0.22635 0.05476 nO.37348 0.39010 0.15534 5.584 2.4553 11 22 N. 0.28639 0.17484 TiO. 33861 0.51171 7.9.74036 4.756 3.2487 12 29 N. 0.35858 0.31922 nO. 29234 0.64430 n9. 84510 3.843 4.4086 13 Feb. 2 N. 0.39502 0.39210 TiO. 26725 0.70754 710.37291 3.424 5.0996 14 3 8. 0.40388 0.40942 nO. 26149 0.51511 nO. 40140 3.334 3.2742 15 5 N. 0.42049 0.44304 710.2-1905 0.75069 nO.41996 3.148 5.6324 16 7 N. 0.43667 0.47540 >iO. 23720 0.77777 nO. 14613 2.981 5.9947 17 16 B. 0.50286 0.60778 nO. 18635 0.75589 nO. 66464 + 2.359 + 5.7009 FORMATION OF EQUATIONS OF CONDITION. VESTUS i. Meridian, Altona. (OBSERVED CENTER.) N'. Date. log. b. log. C. log. g. log. 8. log. n. If. S. 1 9 1851 — Jan. 27 31 0.33887 0.37693 0.27980 0.35592 nO. 31094 nO. 28517 0.48296 0.57089 7i9.0000 nO.3802 + 4.187 •f 3.718 + 3.041 + 3.723 EQUATIONS OF CONDITION. ccxli FORMATION OF EQUATIONS OF CONDITION. VENUS II Equatorial, Santiago. N°. Date. Limb. log. b. log. C. log. 6. log. /. log. g. log. S. log. n. Ic* S. P- 1 1852.— Hay 30 N. S. nO. 35929 0.32061 nO. 33746 0.10111 n9. 03180 nO.6532 + 1.593 —0.1076 3.13 2 June 2 N. S. 7,0.3-2994 0.26194 710.45025 0.12686 n9. 89790 0.1761 1.794 —0.7905 1.55 3 3 N. S. nO. 31966 0.24138 0.22333 0.13209 0.56575 1.838 +3.6793 4 12 N. S. nO. 3 14-24 0.03054 tiO. 36326 0.17892 9.04610 7<0.4I50 2.279 0.1113 1.45 5 15 N. S. 710.17254 9.91714 n9. 37273 0.19429 0.23702 nO. 1461 2.447 1.7259 2.84 I 22 N. S. nO. 05608 9.71433 nO. 14770 0.22779 9.82217 0.3010 2.855 0 IT) 10 3.00 7 23 N.S. nO. 03646 9.67498 719.93693 0.23713 0.08196 710.2041 2.846 +1.2077 3.96 8 24 N. 8. nO. 01608 9.63-1-23 nO. 40651 0.23395 7.9.64610 710.6990 2.937 —0.4430 2.57 9 July 6 N. 719.64163 8.88530 0.49487 nO.OI246 0.27915 0.75100 nO.3010 3.616 +5.6364 2.82 10 1 N. ii9. 46004 8.53214 0.50991 ' 119.50461 0.28769 0.81955 7i0.1139 3.762 6.6001 4.00 11 30 N. S. 9.89612 9.39130 0.29677 0.78865 0.8-261 3.921 6.1469 2.62 IS 31 N.S. 9.9*288 9.44762 nO. 06696 0.29634 0.46679 0.6638 3.914 2.9295 2.18 13 Aug. 4 N. S. 0.01564 9.63334 719.53567 0.27896 0.60467 0.9395 3.01:! 4.0241 1.84 14 8 N.S. 0.09199 9.78604 0.54521 0.25372 0.91114 0.7559 3.217 8.1497 1.50 15 12 N. S. 0. 15723 9.91652 9.90244 0.24430 0.76456 0.9138 3.080 5.8152 2.90 16 13 N.S. 0.17209 9.94624 0.14554 0.24041 0.81341 0.8865 3.026 6.5074 2.57 17 16 N. S. 0.31377 0.02960 0.32141 0.22129 0.87315 0.7076 2.771 7.4670 3.20 18 21 N.S. 0.27543 0.15252 0.37526 0.17332 0.91215 0.7243 2.221 8.1686 3.02 ia N.S. 0.27548 0.15302 0.38360 0.19234 0.91825 0.7324 2.425 8.2841 3.73 20 22 N.S. 0.28676 0.17558 nO. 20918 0.18127 ' 0.63676 0.8361 2.304 4.3327 1.84 21 23 N.S. 0.29792 0.19790 718.76193 0.18194 0.77999 0.8195 3.311 6.0254 2.34 22 28 N.S. 0.34943 0.30092 9.38578 0.15584 0.83949 0.4914 2.049 6.9101 1.41 23 Sept. 1 N.S. 0.38659 0.37524 0.26193 0.12868 0.95332 0.7559 1.609 8.9809 2.88 24 2 N.S. 0.39537 0.39260 0.20393 0.11831 0.94784 0.8573 1.721 8.8682 3.20 25 3 N.S. 0.40402 0.41010 nO. 42746 0.11323 0.67471 1.0899 1.685 4.7283 1.50 26 6 N.S. 0.42895 0.45996 719.33325 0.09292 0.88036 0.8129 1.534 7.5181 3.00 27 7 N.S. 0.43693 0.47592 710.20838 0.08345 0.80092 0.8921 1.469 6.3230 2.82 28 8 N.S. 0.44482 0.49170 0.54732 0.07942 1.06499 0.4150 1.442 +11.6143 3.43 Z 7° ccxlii EQUATIONS OF CONDITION. FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. VENUS II. Equatorial, Santiago. N". Date. Wu.-h. M.T. ohsM r 2r. w.- =FfI>A »•«• ». log. 6. log. S. log. n. P. 1 1853.— May 30 .2578 // 15.62 0.445 —2.370 + 1.05 it 15.40 // +0.87 0.25000 0.44378 9.9395 3.00 a .Inn- 2 .•!',-,] 18.70 0.450 2.550 1.15 15.84 —1.64 0.26255 0.45165 nO.2227 3.50 3 3 .2460 18.08 0.682 2.602 1.77 16.07 0.18 0.27477 0.45979 n9.2553 1.71 4 13 .2456 22.13 0.573 2.902 1.66 18.69 1.73 0.33411 0.49945 nO.2380 2.67 5 15 .2442 23.24 0.974 2.929 2.86 19.61 0.67 0.35478 0.51369 719.8261 2.25 G S3 .2-131 23.79 0.366 2.834 1.04 21.96 0.75 0.40390 0.54834 >|9.8751 3.00 7 23 .2484 25.94 0.508 2.801 1.42 22.32 2.13 0.41096 0.55341 710.3284 3.27 8 24 .2456 24.47 O.C9!) —2.764 1.U3 22.68 0.22 0.41795 0.55845 9.3424 2.25 11 July 30 .74,-,5 31.45 0.451 +0.290 + 0.13 28.4-2 2.85 0.51590 0.63146 til). 4548 1.95 13 31 .7458 29.42 0.540 0.355 — 0.19 28.13 —1.54 0.51189 0.62819 7i0.1875 1.71 13 Aug. 4 .7335 25.74 0. •]'.)! 0.572 — 0.28 26.88 +0.80 0.49179 0.61311 9.9031 1.36 11 8 .718B 24.54 0.980 0.707 + 0.71 55.48 +1.76 0.46854 0.59564 0.2455 1.00 15 12 .7347 S4.63 0.033 0.759 — 0.03 24.02 —0.60 0.44298 0.57671 719.7783 2.83 16 13 .7353 25.42 1.27U 0.762 + 0.97 23.66 0.67 0.43638 0.57177 J19.8261 2.25 17 16 .7189 24.30 0.593 0.735 + 0.44 22.60 1.20 0.41634 0.55729 710.0792 2.67 18 21 .6923 21.98 0.024 0.600 — 0.01 20.91 —1.08 0.38265 0.53320 nO.0334 2.44 19 21 .7144 20.43 U.3W 0.600 — 0.19 20.91 +0.26 0.38249 0.53309 9.4150 3.50 20 22 .7073 21.18 0.331 0.561 + 0.19 20.59 —0.37 0.37579 0.52836 n9.5682 1.36 21 23 .7146 21.65 0.348 0.516 — 0.18 20.26 1.60 0.36901 0.52361 710.2011 1.95 33 28 .7164 20.47 0.056 +0,242 + 0.01 18.77 1.65 0.33577 0.50058 nO.2175 2.44 23 Sept. 1 .7104 19.12 0.005 —0.037 — 0.02 17.69 1.41 0.31002 0.48313 710.1492 2.25 24 2 .7044 19.20 0.896 0.113 — 0.10 17.43 1.80 0.30373 0.47892 nO.2553 2.67 25 3 .7052 18.16 0.664 0.191 + 0.13 17.18 0.90 0.29746 0.47474 719.9542 3.00 ao 6 .7010 17.16 0.393 0.441 0.17 16.47 0.55 0.27905 0.46259 n9.7404 3.00 27 7 .6962 17.90 0.529 0.529 + 0.28 16.25 1.41 0.27305 0.45867 nO.1492 2.67 28 8 .6982 16.78 0.409 0.617 — 0.25 16.03 —0.97 0.26705 0.45476 H9.9868 4.00 FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. VENUS II. Equatorial, Santiago. (FROM DIRECT MEASUREMENT Or DIAMETERS.) N'. Date. W:i!-h. M.T. Obs'd T. No. Obs. rv n. log. e. log. S. log. n. P> 12 13 1.-, 1852.— July 10 31 Aug. 4 12 .2148 .7.-,62 .7510 .7460 28.86 29.26 28.42 25.05 6 5 6 6 2S.31 28.13 26.87 24.01 n — 0.56 1.14 1.56 1.05 0.51428 0.51158 0.49170 0.44284 0.63022 0.62816 0.61304 0.57660 n9.7443 TiO.0550 710.1917 nO.0191 3.28 3.00 3.28 3.28 it; 17 18 33 13 16 21 Sept. 1 .7490 .7.100 .7290 25.32 22.94 21.91 18.20 6 6 6 6 23.65 22.59 20.89 17.68 1.67 0.35 1.02 — 0.52 0.43627 0.41620 0.38233 0.30990 0.57179 0.55719 0.53397 0.48305 710.2227 7i9.5441 nO.0107 719.7202 3.28 3.38 3.28 3.28 EQUATIONS OF CONDITION. ccxliii FORMATION OF EQUATIONS OF CONDITION. VENUS II. Meridian, Santiago. N°. Date. Limb. log. &. log. C. log C. log. g. log S. log. n. F. S. 1 1852.— Miiy30 S. 710.36066 0.32338 710.2-1912 . 0.17411 719.673-28 nO.6628 +2.229 —0.4702 2 31 S. nO.35109 0.30424 7iO.25.WO 0.17928 719.71458 710.2788 2.283 —0.5183 3 June 2 N. nO. 33131 0.26468 0.267G2 0.18977 0.707:6 710.6812 2.396 -f 5. 0952 4 3 S. 7iO.:«107 0.24420 710.27391 0. 19199 n9. 81425 nO.7634 2.455 —0.6520 5 12 N. tiO.2161-1 0.03434 0.33314 0.24383 0.72788 nO.4314 3.074 +5.3441 6 13 S. nO. 20275 0.00756 «0. 339117 0.24942 ti9. 69524 nO.i" 3.154 —0.9891 7 22 N. 710.05908 9.72022 0.40279 0.30050 0.77128 nO.0414 3.990 +5.9050 8 23 S. nO. 03974 9.68154 7>0.40980 0.30612 TlO. 06491 7i0.6721 4.095 —1.1612 9 24 N. 710.01951 9.64108 0.41680 0.31187 0.7S198 710.2553 4.204 +6.0531 1C • 23 N. 7.9.92761 9.457J8 0.44429 0.33-118 0.80484 9.6990 4.660 +6.3803 11 29 S. 719.90124 9.40-154 710.45097 0.33952 «0. 07269 nO.7782 4.775 —1.1623 12 30 N. 719.87317 9.34840 0. -15756 0.34196 0.81673 nO.USS) 4.897 +6.5572 13 July 1 N. 7>!I.S4316 9.28838 0.46401 0.35019 0.82266 719.8151 5.016 6.6475 14 5 N. n9. 69684 8.99574 0.4-- 0.36989 0.84051 0.1461 5.493 7.0329 15 6 N. H9.65151 B.9050S 0.49383 0.37-141 0.85239 0.5051 5.608 7.1185 16 7 N. n9.G99SO 0.49914 0.37870 0.85813 0.4314 5.720 7.2131 17 8 N. 719.54173 8.88553 0.50-122 0.38280 0.86379 0.8195 5.829 7.3079 18 9 N. M'J.- 17467 8.55140 0.50900 0.38666 0.86933 0.8976 5.933 7.4017 19 10 N. n8. 39535 8.39276 0.51348 0.39026 0.87473 0.4314 6.033 7.4914 20 13 N. n8. 99625 7.59456 0.52490 0.39931 O.H8995 0.3979 G.290 7.7615 21 (18) N. 9.17516 7.90238 0.53617 0.40765 0.91127 0.7213 6.536 8.1521 22 26 N. 9.77051 9.15508 D.8J898 0.39844 0.93570 0.7559 6.265 8.6238 23 29 N. 9.87338 9.34882 0.51909 0.38877 0.94UG5 0.9294 5.991 8.7226 24 30 N. 9.90141 9.40488 0.51510 0.38492 0.94208 1.0492 5.885 8.7513 25 31 N. 9.92773 9 45752 0.51073 0.38079 0.94312 0.6335 5.774 8.7785 26 Aug. 4 N. 0.01952 9.64110 0.49077 0.36182 0.94841 0.8633 5.292 8. S7'.l» 27 5 N. 0.03973 9.68152 0.48519 0.35857 0.94961 0.7853 5.165 8.9052 28 6 N. 0.05905 9.72016 0.17!).-,! 0.35123 0.95098 0.8692 5.040 8.93-J2 29 7 N. 0.077SS 9.75716 0.47238 0.34446 C. 95 157 0.9770 4.886 8.9449 30 8 N. 0.09528 9.79362 0.46740 0.33986 0.95358 0.8808 4.783 8.9863 31 10 N. 0.12874 9.85954 0.45482 0.32806 0.95650 0.9770 4.530 9.0470 32 12 N. 0.15980 9.92166 0.44186 0.31592 0.95978 0.8751 4. -283 9.1156 33 13 N. 0.17454 9.95114 0.43527 0.30973 0.96157 0.7489 4.164 9.1532 31 14 N. 0.18880 9.97966 0. -12862 0.30319 0.96348 0.8129 4.046 9.1935 35 16 N. 0.21597 0.03100 0.41581 0.29087 0.96759 0.9395 3.817 9.2809 36 21 . N. 0.27735 0.1.-.676 0.38140 0.95 0.97999 0.8129 3.294 9.4499 37 19 N. 0.28864 O.J7934 0.37466 0. 25-340 0.98285 0.7634 3.198 9.6127 38 23 N. 0.29966 0.90138 0.3G794 0.24595 0.98581 o.eafij 3.104 9.6788 39 28 N. 0.35090 0.30386 0.33478 0.21379 1 .00334 0.8513 8.677 10.0541 40 31 N. 0.37898 0.31340 0.19461 1.01355 0.8062 2.450 10.3168 41 Sept. 1 N. 0.38795 0.37706 0.30904 0.18824 1.01748 0.8633 2.380 10.4106 42 2 N. 0.39076 0.39554 0.30373 0.18189 1.02149 0.6532 2.311 10.5074 43 3 N. 0.405-18 0.41302 0.29619 0.1, 1.02570 0.7324 S.345 10.6094 44 6 N. 0.43024 0.4G254 0.27809 0.15663 1.09 0.8693 2.058 10.KS3 45 7 N. 0.43899 0.47850 0.27206 0.15035 1.04286 0.8808 1.888 11.0371 46 8 N. 0.44696 0.49418 0.96012 0.11-110 1.04736 0.79U3 1.912 +11.190 ccxliv EQUATIONS OF CONDITION. FORMATION OF ADDITIONAL EQUATIONS OF CONDITION. VENUS II. Meridian, Santiago. (FIIOM DIRECT MEASUREMENT OF DIAMETERS.) N°. Date. Wmll. M.T. Obs'il r. r. n. log. 6. log. S. log. n. 1 I85S.-SU) .1131 it 15.15 ii 15.37 n +0.22 0.34913 0.44322 9.3424 2 31 .1136 10.00 15.59 —0.47 0.25522 0.44712 7.9.6721 3 Juni; 3 .111.) 15.00 IB. 04 +0.54 0.96763 0.45513 9.7324 4 ;i 16.89 in. 128 —0.61 0.27391 0.45933 118.7889 5 12 .1032 16.57 18.65 +U.08 0.333M 0. 49879 8.9031 G 13 .1009 18.64 18.95 0.31 0 331)97 0.50347 9.4914 7 22 .0865 21.64 21.90 0.35 0.40379 0.54751 • 9.4065 8 23 .0833 21.92 23.26 0.33 0.40980 0.55258 9.5250 9 24 .0810 21.99 22. 63 0.63 0.41680 0.55762 9.7993 10 28 .1)708 21.64 24.10 2.45 0. -14429 0.57767 0.3900 11 29 .0680 23.32 24.47 1.15 0.45097 D. 58880 0.0607 12 30 .0651 23. CO 24.85 1.25 0.45756 0.58747 0.0969 13 July 1 .11620 23.94 25.21 1.26 0.46401 0.59237 0.1021 14 5 .0488 24.57 26.67 a.'ou 0.48826 0.61044 0.3312 It 6 .0452 25.27 27.00 1.72 0.4S383 0.61465 0.2368 Hi 7 .0415 25.41 27. 34 1.93 0.49914 0.61868 0.2844 17 8 .0376 25.55 27.66 2.10 0.504S9 0. 63354 0.3332 IS 9 .(i:«7 26.74 27.97 1.S3 0.50 7 .8589 16.61 16.21 0.40 0.27206 0.45803 719.6075 46 8 16.33 15.99 —0.34 0.26612 0.45416 tl9.5378 13 .8555 14.80 14.96 +0.16 0.23728 0.43508 9.2041 EQUATIONS OF CONDITION. ccxlv FORMATION OF EQUATIONS OF CONDITION. VENUS II. Equatorial, Washington. (OBSERVED BOTH LIMBS.) N°. Date. log. b. log. C. iai.0. log. S. log. H. jfca. s. p. 1 1852.— May 31 nO. 3.1887 0.29980 .19.95198 7.9. 12678 : nO.MIil + 0.602 — 0.1339 3. 87 2 June 5 nO.29724 0.196:14 n0.003C9 r.9. 622111 nO.2788 1.017 0.4188 3.43 3 y nO. 2.1 106 0.10418 no.oxra ,.9.78333 1.0.1461 1.201 0.6072 3.27 4 11 n0.2251!l 0.0531M 7iO.112.5l TI'.I. 92763 1.C79 — 0.8465 5 Aug 26 0.3D 0.25993 nO. 10896 0.56435 1.6S3 -f S.iiir,:; 6 £9 0.35848 9.S190B nO. 08557 0.61801 O.X6-.K2 1.483 + 4.14% 3.:i9 FORMATION OF EQUATIONS OF CONDITION. VENUS II. Equatorial, Washington. ... Dale. Wa>h.M.T. obj'cir. 2 T. w.. TrZVV f. n. log. e. log. S. log. n. P- 1 1852.— May 31 .3422 1 :..:.(! 0.304 It —2.439 /' 1! — 0.74 15.65 —0.69 0.25664 0.44804 719.8388 3.59 2 June 5 .3474 18.05 0.077 2.698 — 0.21 16.82 I.SS 0.28820 0.46861 710.1903 3.00 3 9 .3176 20.62 0.4)0 2.840 + 1.16 17.87 1.48 0.31453 0.48617 7i0.i703 3.27 4 11 .3860 21.40 0.484 —2.886 1.40 18.44 1.45 0.32827 0.49547 7iO 1614 3.00 5 Aug. 26 .6570 21.97 0.492 +0.364 0.18 18.38 •J.5-! 0.34935 0.50992 nO.4014 2.67 6 29 .6568 20.63 ; 0.228 +0.180 + 0.04 18.51 —2.16 0.32964 0.49641 TiO.3345 2.67 FORMATION OF EQUATIONS OF CONDITION. VENUS II. Her Id tan , Greemvu -h . H'. Date. Limb. log. b. log.C. teg. ,/. log. S. log. 11. F. S. 1 '. -V:iy -M S. tiO.41429 0.43064 n9. 85546 n9. 78030 B0.6SB3S + 0.514 — 0.6173 2 July 3 S. n9.; 9.14818 nO. 22774 nO. 33076 710.38739 2.854 2.1417 3 5 S. •9,89 8.98718 nil. 24342 nO. 33185 8.70757 3.06S 2.1471 4 6 s. n9. 64590 8.881 H0.95080 7.0.33159 7.0.17026 3.174 8.1458 5 7 s. ..9.59363 8.78932 no.-',. 710.33072 •8.63347 3.279 2.1415 6 8 s. ..9.53118 8.6704S )i0.2i; 162 1.0.32929 9.44716 3.383 2.1345 7 12 s. ng.US 7.!«!-.MO 710.28769 nO. 31656 718.90309 3.763 2.0728 8 13 s. n8.95 7,58110 M0.29-JIO 710.31141 0.12710 3.844 9 16 s. 8.95fi i: 7.51478 nO. 30368 1.0.28294 0.13033 4.048 — 1.9184 10 22 N. 9.58979 8.78164 nO. 31199 9.60(121 0.48001 4.21)7 + ().: 11 Aug. 4 S. O.Ololl 9.63294 710.26514 n9.5'6-J3 0 72")91 3.395 — 0. 371)9 12 12 S. o.i.-i(is:> 9.91576 11813 9.7S651 0.84386 2.656 + O.i: 13 24 S. 0.30821 0.21848 I10.1-J470 0.3TIII9 O.M 1.776 2.3550 14 30 N. 0.368(10 0.33806 .iH.118380 11.72116 0.7, 1.471 6.9886 IS Hi-pl. 1 N. sa 0.37448 iiO.lf, 0.750C8 0.77:105 1 ::-•> 5.6344 16 2 N. o.:?.' 0.39212 " .iD.110469 0.76263 0.711727 1.347 5.7894 17 13 N. 0.4-: 0.565*2 n0.0044'J 0.6- 0.79009 1.081 + 7.702I ccxlvi EQUATIONS OF CONDITION. FORMATION OF EQUATIONS OF CONDITION. VENUS II. Meridian, Cracow. (OBSERVED CENTER.) N°. Bate. log. b. log. C. log. g. log. S. log. n. F. S. 1 ! —June 2 nO. 33385 0.2C'J76 9.91162 0.18181 0.30103 -f O.OIili + 1.5199 2 3 71(1.32367 0.24940 9.92102 0.17681 . ii0.07918 0.695 1.50BS •J 4 nO.31324 0.22854 9.93052 0.17251 nO.50515 0.726 1.4877 4 5 ill).. 10257 0.20720 9.94007 0.16891 nO. 80618 0.75U 1.4754 7 liO. 26039 0.16284 9.95949 0.16391 uO.07918 0.830 1.4586 6 8 n0.268:6 0.13978 9.96931 0.16265 .19.60206 0.868 1.4543 7 11 nO.23233 0.06672 9.SW08 0.16334 9.30103 0.996 1.4566 8 12 710.21944 0.04094 0.00909 0.16.109 0.17609 1.043 1.4635 9 14 nO.19245 0.98696 0.02922 0.17097 nO. 74036 1.144 1.4824 10 17 nO. 14854 9.69914 0.05951 0.18523 0.71600 1.315 1.5319 11 18 nO.13286 9.86778 0.069J9 0.19128 nO.43136 1.378 1.5534 13 23 >iO. 04469 9.69144 0.11951 0.23040 H9.00000 1.734 1.6S98 13 26 nt.98170 9.56546 O.M863 0.95859 uO. 23045 1.983 1.8138 14 27 119.95850 9.51906 0.1f>Sll 0.26968 0.80618 2.017 1.8607 15 Aug. IT 0.22574 0.06354 0.16082 0.72108 1.13354 2.097 5 2611 16 18 0.23844 0.06894 0.15344 0.72651 0.79934 S.027 5.3274 § 10.-WEIGHTS AND MEAN ERR011S. It is manifest that, whatever efforts may be directed to the investigation of the relative value of the several classes of observations, and to the relative precision of measurements made with different instruments and by different observers, the ultimate combination of these observations must be in a great degree empirical, and, if not directly, yet certainly implicitly dependent upon the judgment and discretion of the investigator. Under no circumstances can this fact be better illustratedjthan the present. We are to endeavor to deduce a correction for the adopted parallax from the materials furnished by observations of two different planets, the one superior, the other inferior, and each of them during two oppositions or conjunctions. A measure of relative value for these four diverse cases seems unattainable, and the course of this discussion is directed to the attainment, from each of these four series, of the best independent value which they can be made to yield. But in each planet- series the case is analogous. We have different classes of observations, some absolute, and some relative ; different instruments, some powerful and some but mediocre ; different stations, some favorable for comparison with the others, and some the reverse; different climates, some offering a cloudless and transparent sky, and some seldom permitting the planet's disc to be distinctly seen ; while the so-called observation itself is in some cases deduced from forty or fifty single comparisons which have occupied a period of several hours, and in others simply the result of a single pointing. To establish a unit of weight common to all, and to determine with correctness the proportionate value of each observation, is purely impossible. WEIGHTS AND MEAN ERRORS. CCxlvli One serious difficulty is encountered on the threshold. Whatever principle we adopt for the determination of the relative weight of an observation from the number of comparisons of which it is composed, it is palpable that the accuracy of a position for a given epoch, deduced from successive measurements of the position of a body in motion, is governed by a different law from that which regulates the precision of the mean of numerous independent measurements, with the same implements, of the position of a body at rest. The discrepancies of the several observa- tions from their mean will be distributed according to a somewhat different law in these two cases ; for the circumstances under which the several comparisons are made are constant in the one and slowly varying in the other. The formation of an observation from a number of com- parisons at different times is, in fact, the construction of a normal place; whether the intervals between the several measurements be counted in minutes, hours, or even days. There can be no reasonable doubt, since the investigations of Professor Peirce upon the theory of errors, that in repeated measurements of the same quantity by the same instrument a limit is soon attained beyond whicli an increase of precision by an increase of the number of measurements is either absolutely nothing, or, at the most, inappreciable. To determine this limit is a matter of experiment ; and it is very certain that it will not be the same for a variable and for a constant quantity. In fact, the limit for a variable quantity may be regarded as a function of two limits, one of whicli is the same as for a constant, while the other is not. Therefore our first problem is to determine the relation between the number of comparisons of a planet's limb with a star, and the weight which is to be assigned to the resultant determination of the distance. The assumption of a probable error inversely proportional to the square root of the number of observations leads, in fact, to palpable absurdity ; and if rigorously followed would imply that the mean of a very large number of coarse approximations is preferable to that of a few delicate measurements. It may be pardonable to express, in this connection, the strong belief that a practical adoption of some such principle for guidance seems to be exerting a highly prejudicial influence on astronomical observations in many parts of the world ; tending to profligate expenditure of an amount of labor upon the repetition and multiplication of observa- tions, one-fourth of which, if directed to the increase of delicacy rather than the increase of number — to quality, in short, rather than to quantity — would resalt in a rapid advance, not only of theoretical and sidereal astronomy, but, through these, of all departments of the science. No multiplication of the number of observations can afford a mean entitled to higher reliance than the nature of the instrument permits, or than the methods, manipulations, and sensibility of the observer are competent to attain ; and the theory of probabilities soon ceases to contribute to the refinement of an accuracy, of which instrument and observer are incapable of taking cognizance. Some rule for guidance having been determined upon, we are next to fix the relative weight of positions of the center or measures of diameter, derived from the combination of an unequal number of comparisons for the two limbs. The probable error of a pointing, too, is entirely different for a planetary limb, for an estimated center, and for a fixed star; and finally, the great inequality in the trustworthiness of the places adopted for the comparison-stars exerts its full influence upon the weight to be assigned to the deduced places of the planet. These points being disposed of, and values of the several observations of every group being referred to a common unit of weight, we have different groups to be combined with one another, the results of meridian observations with those of equatorial ones, and that uncomfortably ccxlviii WEIGHTS AND MEAN ERRORS. embarrassing problem of relative Weight to be solved, which always arises when observations at different places and of widely different orders of merit are to be blended. The criterion for estimating their relative values is clearly to be supplied by the respective probable errors ; but the attainment of these probable errors is environed with obstacles. The probable errors, as determined by the deviation of the individual comparisons from their average, are clearly not available for this purpose, as the first attempt renders very manifest. Cases are not unfrequent in which the mean error, thus determined, is least for the poorest observations ; and in the present discussion it was found that for one observatory the average deviation of the individual comparisons from their mean was both less than the probable error of this mean, as derived from the discussion of the entire series, and than its actual deviation from the truth. Nevertheless the investigation of the first-named conventional mean error of observation is a matter of considerable interest, and the results which it furnishes are here appended. They were obtained by reducing the places given by the several comparisons to the corresponding places for the time of their mean, correcting, of course, for differential refraction and differential parallax. For the Santiago equatorial, — in which a correction to the adopted value of the revolution of the micrometer- screw, amounting to O."0057 or to about one-half of the last unit employed by Lieutenant Gilliss, was indicated by the solution of the fundamental equations — the values have been corrected also for the change in this constant of reduction. On the other hand the observations of one night, (1849, December 12,) were rejected, being evidently affected by some abnormal source of error. The columns headed e show the mean variation of each com- parison from the mean for each date. Mean Errors for Comparisons of Mars at Santiago. Dale;. Number. 2vv. e. Date. Number. J*. 0 1849.-DCC. 11 32 — 2 20.32 w ± 1.604 1850.- Jan. 12 20 — 2 7.17 I! ± 1.230 15 46—2 43.28 1.934 14 24 — 2 14.35 1.574 17 45 — 2 11.83 1.022 22 24 — 2 11.02 1.379 18 25—2 13.89 1.515 29 22 — 2 3.32 0.794 21 6 — 2 1.84 1.322 1852.— Jan. 24 46 — 2 42.63 1.918 27 39-2 13.50 1.177 30 50 — 2 22.58 1.337 1849.— Dec. 31 36 — 2 14.84 1.288 Feb. 2 30 — 3 3.19 0.658 1850.— Jan. 1 45 — 2 9.33 0.908 3 30—2 3.54 0.693 4 50 — 2 j 13.96 1.051 6 17 — 2 7 27 — 2 5.54 11.24 1.184 1.307 Total .... 653 —42 282.38 ± 1.326 9 20 — 2 3 34 0.840 10 18 — 2 11.67 1.666 WEIGHTS AXD MEAN EEK01IS. cixlix Mean Errors for Comparisons of Venus at Santiago. Date. Number. 2'vv. £. Date. Number. -VV. e. r. // r. 1850.— Oct. 19 33 — 1 29.68 ± 1.88 1851.— Jan. 24 8 — 1 1.60 ± 0.93 2-2 45 — 1 16.84 1.21 Feb. 5 40—2 4.H 0.70 25 21 — 1 6.08 1.08 6 50—2 26.44 1.45 • 7 — 1 2.91 1.36 7 24—2 2.62 0.67 Nov. 1 23 — 1 3.11 0.75 10 24 — 2 2.83 0.70 2 31 — 1 17.36 1.48 1852.-June 2 13 — 2 3.17 1.05 7 17 - 1 2.23 0.73 23 12 — 2 12. 92 2.22 13 24 — 1 4.58 0.87 Aug. 12 9 — 2 6.45 1.87 14 87 — 1 5.42 0.89 16 8 — 2 1.05 0.82 21 22—1 3.11) 0.75 Sept. 3 10 — 2 2.16 1.01 1851.— Jan. 15 30 — 1 5.80 0.87 8 20 — 2 19.52 2.03 Total 497 -32 181.00 ± 1.216 Mean Errors for Comparisons of Mars at Washington. Date. Number. Sw, £. Date. Number. 2vv. e. r. ft r. // 1849.— Nov. 24 10 — 2 8.01 ± 1.54 1850.— Jan. 9 14 — 2 49.57 ± 3.12 28 80 — 2 148. SO 2.17 12 14 — 2 10.75 1.45 Dec. 6 17 — 2 17.49 1.66 14 4 — 2 2.66 1.77 11 11—2 28:42 2 73 22 21—2 2'. 87 1 86 12 15 — 2 19.91 1.90 29 6 — 2 19.84 3.43 17 37—2 28.53 1.39 1852.— Jan. 24 12 — 2 11.91 1.68 27 42 — 2 94.64 2.36 30 8 — 2 10.48 2.03 31 24—2 66.31 2.61 Feb. 2 16 — 2 5.65 0.97 lS50.-Jan. 5 24 — 2 50.68 2.33 3 18 — 2 7.49 1.05 Total 373 —36 609.11 ±2.067 Mean Errors for Comparisons of Venus at Washington. Date. Number. 2vv. 6. Date. Number. 2'vv. t, r. // r. // 1850.- Oct. 19 7—2 4.12 ± .40 185l.-Jan. 15 32 — 2 29.13 ± 1.51 • 9 — 2 4.00 .16 24 8 — 2 3.37 1.15 Nov. 1 8 — 2 4.29 .30 1852— May 31 15 — 2 15.75 1.69 2 15 — 2 15.91 .70 June 5 10 — 2 6.22 1.36 13 8 — 2 3.68 .21 9 12 — 2 3.91 0.96 14 8 — 2 5.74 .50 11 10—2 6.12 1.34 21 21—2 14.54 .34 Aug. 26 8 — 2 13.66 2.32 1851. -Jan. 13 24 — 2 21) 38 .48 29 8 — 2 8.40 1.82 Total 2.i3 —32 159.25 ± 1.487 Z8° ccl WEIGHTS AND MEAN ERRORS, Mean Errors for Comparison of Mars at theCape of Good Hope. 1 — Date. Number. -VV. £. 1 • Date. Number. Ivv. £. 1849 — Nov. 21 21 24 26 30 Dec. 6 8 4 — 2 4 — 2 4 — 2 6 — 2 4 — 2 20 — 2 10 — 2 10 2 r. 6.90 0.62 0.86 23.52 0.53 15.52 4.98 1.07 ± 1.86 0.56 0.66 2.42 0.51 0.93 0.79 0.37 1849.— Dec. 17 18 18 21 21 29 18.10— Jan. 7 9 10 — 2 10 — 2 10 — 2 4-2 4 — 2 5 — 2 4—2 4 — 1 r. 8.82 8.80 10.98 0.77 1.49 0.3.') 1.54 8.11 ± 1.05 1.05 1.17 0.62 0.86 0.33 0.68 1.64 14 15 17 10 — 2 10 — 2 10 — 2 2.38 9.45 6.67 0.55 1.09 0.91 10 12 14 4 — 1 4 — 2 6 — 2 0.78 0.1S 0.64 0.51 0 27 0.40 Total 157 —42 114.91 ± 0.9996 Mean Errors for Comparisons of Mars at Greenwich. Mean Errors for Comparisons of Mars at Cambridge. Date. Number. Ivv. £. Date. Number. Ivv. £. 1S49.— Nov. 26 30 4,- 2 4—2 43.30 32.86 // ± 4.60 4.05 1849.— Dec. 27 1850.— Jan. 4 6 — 1 6 — 2 16.32 0.41 ± 1.85 0.32 Dec. 8 5 — 1 6.74 1.30 5 8 — 2 8.73 1.21 15 4-1 19.49 3.55 7 3—1 3.16 1.26 Total 40 —12 130.01 ± 2.155 Date. Number. -VV. S. Date. Number. Ivv. £. r. ii r. // 1848,-Nov. 21 r> — 2 4.73 ± 0 59 1849,-Dcc. 28 10 — 2 1.13 ± 0.37 21 11—2 1.95 0.46 29 4 — 1 21.61 2.63 26 5 — 1 0.44 0.33 31 12 — 1 S3. 71 1.44 30 6 — 1 1.15 0.47 185.0.— Ian. 1 11 — 1 2.50 0.49 Dec. 11 8 — 2 1.68 0.52 4 4 — 1 2.54 0.90 17 4 — 1 0.96 0.55 5 10 — 2 3.19 0.62 21 5 — 1 0.56 0.37 6 7 — 1 1.05 0.41 27 5 - 1 0.38 0.30 10 7 — 1 0.85 0.37 Total 124 —21 68.43 ± 0.790 RECAPITULATION. Mean Errors for the different Places.of Observation, as deduced from the variations of the several Comparisons from their mean. Place. N°. comp. N". ofobs. Planet. Mean error. Santiago . . . 652 43 Mars . . . . // ± 1.326 Santiago . , . 497 33 Venus . . 1.216 Santiago . . . 1,149 74 Both . . . 1.278 Washington 373 36 Mara .... 2.067 Washington 203 32 Venus . . . 1.487 Washington 576 68 Both . . . 1.872 Cape G. H. . . 157 42 Mars .... 1 .0(10 Greenwich . . 40 12 Mars .... 2 155 Cambridge . . 124 21 Mars .... 0.790 WEIGHTS AND MEAN ERRORS. ccli How tintrustworthy any function of this mean error would be as a guide in assigning the proportionate weights to the different series before combining them in one, may be inferred from a single glance at the values of x, approximately deduced from the different sets of observa tions, on the assumption that the unknown quantities z and v are negligible. We may do this by simply solving the equations : [aa] [bn] — [ab] [an] [an] — [oZ»] y " [act] [bb' | - HW"' [aa] and shall find — Mars I. Mare II. Yen ns I. Venus II. 4- 1 294 4- 0 606 0 271 4- 1 634 " meridian .... -f- 0. 450 -f- 2. 938 + 2. 529 " " (suppl ) 0 062 -|. \ 732 4- 1 387 2 932 4 2 603 Cape " ... 4 1 939 " meridian . •••••«. _j_ i 278 4- 0 094 Greenwich equatorial . .. 0 522 0 076 -(- 0. 584 4- 3. 172 + 1.083 Cambridge equatorial 4- 1 298 Athens meridian 4- 6 627 Kremsmunster meridian .... 0 142 Cracow " + 4.573 Altona "• 0 970 The only method available for attaining impartial discrimination seems to be the determina- tion of the mean error of an observation, by means of a preliminary solution of normal equations, derived from empirical combination of the several groups for each planet-series. Assuming the values thus obtained for our unknown quantities as sufficiently correct, we may substitute them in the final equations of each group, and thus proceed to a determination of the weight for each from the sum of the squares of the residuals outstanding after the substitution. At the same time we become entitled to compare the different values of the unknown quanti- ties furnished by the several planet-series, and to remove the terms containing t, u, and v, which will have been determined with sufficient approximation, and which have only been introduced into our formulas for the sake of avoiding any possible error with which they might, if disre- garded, affect our ultimate values for the remaining unknown quantities. For this preliminary solution, we may be permitted to attribute equal precision to the work of the several observatories, omitting, however, all observations made at places for which the details of the observations are inaccessible, and examination of the reductions consequently impossible. The question of the relative value of the several groups can then be considered with greater propriety. The relation of the weight of the observation to the number of comparisons of which it is composed is the first topic for consideration. In forming the catalogue of star-places the ordinary principle of combination has been retained, and for a two-fold reason. In the first place, the number of observations of the same PC1;! WEIGHTS AND MEAN ERRORS. • star from any one authority was rarely sufficient to render the resulting places essentially different, whatever the principle adopted for the assignment of weights ; and secondly, so large an amount of labor had already been expended on the determination of these places before my attention was drawn to this question, that a repetition of the work would have entailed an expenditure of time and care altogether disproportionate to the possible increase of accuracy in the resultant places ; an increase which would certainly have been of a different order of mag- nitude from the inevitable uncertainty of the ultimate determination. The numbers annexed to the star-places of our General Catalogue, and there denominated weights, should in truth be divided by a factor which for the majority of cases is not far from constant ; but the assump- tion of a limit of accuracy beyond which the multiplication of observations is comparatively useless renders even such division much less important, and these quantities may therefore be practically regarded as representing the number of standard observations from which the adopted positions are derived. This number is generally large enough to render the assump- tion very reasonable, and the principle has been followed throughout the present computation. For the determination of the value of a measured position from the number of its constituent observations, or of the weight of an observation as a function of the number of comparisons upon which it depends, let us, as the simplest, and a fully sufficient means of attaining the end designed, consider each of the set of individual comparisons as affected with a constant error c, and introduce this constant error as a multiple of the theoretical mean error e. For simplicity's sake we will disregard the technical "probable error," to which, of course, the linear functions of the mean error are convertible by multiplication with the constant factor, and will employ only the quantity e, which we may call the probable discordance from the mean. We shall then have, by putting c= as, the probable mean errors, thus : For the result from 1 observation, e. Va* -\- I " n observations, e.-J a3 -j — V y/, I the weights of the two determinations being respectively -ajTv an(* — s~+T Consequently the result from n observations has, when compared with that from 1 observation, the weight — which assumes a more convenient form if instead of a, the ratio of the errors, we introduce b, the ratio of the weights, so that *=*=£; *»«J*t- = n — n n — A(n — 1) A -{- n(\ — A) The annexed table is based upon the hypothesis of A =. |- ; or, what is the same thing, b •=. 5, a value which experiment appears to indicate as more probable than any other integer for the average of the observations under discussion. Weights as Functions of the Number of Observations. N°. Weillllt. N°. Weight. N°. Weight. N°. Weight. PT. Weight. N°. Weight. 1 1.00 11 4.13 21 4.85 31 5.17 41 5.35 60 5.538 •n 1.71 12 4.21 22 4.89 32 5.19 42 5.36 70 5.600 3 3.35 13 4.33 23 4.93 33 5.21 43 5.38 80 5.647 4 2.67 14 4.42 24 4.97 34 5.23 44 5.39 90 5.684 C 3.00 15 4.50 25 5.00 35 5.25 45 5.40 100 5.714 6 3'. 27 16 4.57 26 5.03 36 5.27 46 5.41 200 5.854 7 3.50 17 4.64 27 5.06 37 5.29 47 5.43 300 5.901 8 3.69 18 4.70 28 5.09 38 5.30 48 5.43 400 5.926 9 i 3.86 19 4.75 29 5.12 39 5.32 49 5.44 500 5.941 10 4.00 20 4.80 30 5.14 40 5.33 50 5.45 1000 5.970 Where two results are to be combined, the one derived from n, the other from n' observations, and having respectively the weights P(n) and P(n'}, we shall have P(","') — or p<;«) And since — | . .*. — iv « • + b ' n' + _ __1 2 re n' -f (n + n') b nn p(n,n>) — - Or— From this formula, and the assumption as before b =: 5, the table is constructed which gives the weights as functions of two numbers of observations, the decimal point being avoided by assuming 100 as the unit of weight. The quantities under discussion being the means of the two sets of observations, are entitled, after halving, to a double weight, so that the tabulated function is — O DCn.n'l 12 100 The last table contains, of course, the values given by the present one for the special case when n= n'; that is to say, when the number of observations is equal in the two sets and their mean is taken. ccliv WEIGHTS AND MEAN ERRORS. WEIGHTS AS DEPENDENT UPON 1 2 3 4 5 C 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 1 • 100 126 138 145 150 153 155 157 159 160 161 162 162 163 164 165 165 165 165 16C 166 166 166 2 126 171 195 209 218 225 230 234 237 240 242 244 345 247 248 249 350 251 252 253 253 254 254 3 138 195 225 244 257 267 274 280 284 288 291 294 296 298 300 302 303 304 305 306 307 308 309 4 145 209 244 267 282 294 303 310 315 320 324 327 330 333 335 337 339 341 342 343 344 345 346 5 150 218 257 282 300 313 323 331 338 343 347 351 355 358 360 362 364 366 368 369 370 372 373 6 153 225 267 394 313 327 338 347 354 360 365 369 373 376 379 381 383 385 387 389 391 393 394 7 155 230 274 303 323 338 350 359 366 373 379 383 387 391 E94 396 399 401 403 405 406 408 409 8 157 234 280 310 331 347 359 369 377 384 390 395 399 403 406 409 411 413 415 417 419 421 423 9 159 237 284 315 338 354 366 377 386 393 399 404 408 412 415 418 421 423 426 428 430 431 433 10 160 240 288 320 343 360 373 384 393 400 406 411 416 420 424 427 429 433 434 436 438 440 442 11 161 242 291 324 347 365 379 390 399 406 413 418 423 427 430 434 437 439 442 444 446 447 449 12 162 244 294 327 351 369 383 39o 404 411 418 424 458 433 436 440 443 445 443 450 452 454 456 13 162 245 296 .Til) 355 373 387 399 408 416 423 428 433 438 442 445 418 451 453 455 458 459 461 11 163 247 298 333 358 376 391 403 412 420 427 433 438 443 446 449 452 455 458 460 462 464 466 15 164 248 300 335 360 379 394 406 415 424 430 436 442 446 450 454 457 460 462 464 467 469 470 16 165 249 302 337 362 381 396 409 418 427 431 440 445 449 454 457 460 463 466 468 470 472 474 17 165 250 303 339 364 383 399 411 421 429 437 443 448 453 457 460 464 466 469 472 474 476 478 18 165 251 304 341 366 385 401 413 423 432 439 445 451 455 460 463 466 470 472 475 477 479 481 19 165 252 305 342 368 387 403 415 426 434 442 448 453 458 462 466 469 472 475 478 480 482 484 SO 166 253 306 343 369 369 405 417 428 436 444 450 455 460 464 468 472 475 478 480 482 484 486 21 166 253 307 344 370 391 406 419 430 438 448 452 458 462 467 470 474 477 480 482 485 486 488 22 166 254 M 345 372 393 408 421 431 440 447 454 459 464 469 472 476 479 482 484 486 489 491 33 166 L'.l 1 309 346 373 394 409 423 433 443 449 456 461 466 470 474 478 481 484 486 488 491 493 24 166 255 310 347 374 395 411 424 434 443 451 457 463 467 472 476 480 483 486 488 490 493 495 as 167 255 310 348 375 396 412 425 435 444 452 459 464 469 474 477 481 484 488 490 492 494 496 36 167 256 311 349 376 397 413 426 437 446 453 460 466 471 476 479 482 486 489 491 494 496 498 27 167 256 312 349 377 398 414 427 438 447 454 461 467 472 477 480 484 48T 490 493 495 497 499 38 167 257 312 350 378 398 415 4-28 439 448 456 463 468 473 478 482 485 489 492 494 497 499 501 29 167 257 313 351 378 399 416 429 440 449 457 463 469 474 479 483 486 490 493 495 498 500 502 30 167 257 313 351 379 400 417 430 441 450 458 465 470 476 480 484 488 491 494 497 499 501 503 31 168 217 313 352 380 401 417 431 442 451 459 465 471 476 481 485 489 492 495 498 500 502 504 32 168 258 314 352 380 401 418 431 443 452 460 466 472 477 482 486 490 493 496 499 501 503 505 a 168 258 314 353 381 402 419 432 443 453 460 467 473 478 483 487 491 494 497 500 502 504 506 34 l« 258 315 353 381 403 419 433 444 453 461 468 474 479 484 488 491 495 498 501 503 505 507 33 168 258 315 354 382 403 420 434 445 454 462 469 475 480 485 489 493 496 499 502 504 506 508 96 168 259 315 354 M 404 421 434 445 455 463 470 476 481 485 490 493 497 500 502 505 507 509 .'17 168 259 316 355 :M 404 421 435 446 455 463 470 476 481 486 490 494 497 500 503 506 508 510 38 168 S59 316 355 383 405 423 435 447 456 464 471 476 482 487 491 495 498 501 504 506 509 511 • 168 259 316 355 :i- 1 405 422 436 447 457 465 471 478 483 488 492 495 499 502 505 507 SCO 511 40 168 M 316 356 384 406 423 436 448 457 465 472 478 483 488 492 496 499 503 505 508 510 512 1 168 360 317 356 an 406 423 437 448 458 466 473 479 484 489 493 497 500 503 506 508 511 513 42 169 260 S17 356 IBB 407 424 437 449 458 466 473 479 485 489 493 497 501 504 507 509 511 513 43 169 260 317 356 385 407 424 438 449 459 467 474 480 485 490 494 498 501 504 507 509 513 514 44 169 260 317 357 M 408 424 438 450 459 467 474 480 486 491 495 498 502 505 508 510 513 515 45 169 260 318 357 386 408 425 439 450 460 468 475 481 486 491 495 499 502 505 508 511 513 515 46 169 260 318 357 386 408 425 439 450 460 468 475 481 487 491 495 499 503 506 509 511 513 515 WEIGHTS AND MEAN ERRORS. cclv 71VO SETS OF MEASUREMENTS. 24 r> •H\ 27 1 28 29 30 31 32 33 34 35 36 37 38 39 40 42 44 46 48 50 166 167 167 187 167 167 167 168 168 168 168 168 168 168 168 168 168 169 169 169 169 169 1 255 255 956 256 257 257 257 257 258 258 258 258 259 259 359 259 359 260 260 260 261 261 2 310 310 311 312 312 313 3)3 313 314 314 315 315 315 316 316 316 316 317 317 318 318 319 3 347 348 349 340 350 351 351 352 352 353 353 354 354 355 355 355 356 356 357 357 m 358 4 374 375 376 377 378 378 379 380 380 381 381 382 382 383 383 384 384 385 388 386 387 387 5 395 396 397 398 398 399 400 401 401 402 403 403 404 404 405 405 406 407 M 408 409 409 6 411 412 413 414 415 41G 417 417 418 419 419 420 421 431 422 423 423 424 424 425 426 426 7 424 425 426 427 428 429 4HO 431 431 432 433 434 434 435 435 436 436 437 438 439 440 440 8 434 435 437 438 439 440 441 443 443 443 444 445 445 446 447 448 448 449 450 450 451 452 9 443 444 446 447 448 449 450 451 452 453 453 454 455 455 456 457 457 458 459 460 461 462 10 451 453 453 454 456 457 458 459 460 460 461 462 463 463 464 465 465 466 467 468 469 470 11 457 459 460 461 462 463 465 465 466 467 468 469 470 470 471 471 472 473 474 475 476 477 12 463 464 466 467 46K 469 470 471 472 473 474 475 476 476 476 478 478 479 480 481 489 483 13 467 469 471 472 473 474 476 476 477 478 479 430 481 481 482 483 483 485 486 487 488 488 14 472 474 476 477 478 479 480 481 483 483 484 485 485 486 487 488 488 489 491 491 492 493 15 476 477 479 480 482 483 484 485 486 487 488 489 490 490 491 493 492 493 495 495 496 497 16 480 481 489 484 485 486 488 489 490 491 491 492 493 494 495 495 496 497 498 499 500 501 17 483 484 486 487 489 490 491 492 493 494 495 496 497 497 498 499 499 501 503 503 504 505 18 486 488 489 490 492 493 494 495 496 497 498 499 500 SCO 501 502 503 504 505 506 507 508 19 188 490 491 493 494 495 497 498 499 500 501 502 502 503 504 505 505 507 508 509 510 511 20 490 493 494 495 497 498 499 500 501 502 503 504 505 506 506 507 508 509 510 511 512 513 21 493 484 496 497 499 500 £01 m 503 504 505 506 507 508 509 509 510 511 513 513 514 516 23 495 496 498 499 501 502 503 504 505 506 507 508 509 510 511 511 512 513 515 515 516 518 23 497 498 500 501 503 504 505 506 507 508 509 510 511 513 513 513 514 515 517 517 518 520 24 498 500 501 503 504 506 507 508 509 510 511 513 513 514 515 515 516 517 518 519 520 522 35 500 501 503 505 506 507 509 510 511 512 513 514 515 516 516 517 518 519 520 531 522 523 S6 501 503 505 506 507 509 510 611 512 513 514 515 516 517 518 519 519 521 522 533 524 525 37 503 504 506 507 509 510 512 513 514 515 516 517 518 519 520 520 521 532 523 524 525 527 28 504 506 507 509 510 512 513 514 515 516 517 518 519 530 531 523 523 524 535 526 537 528 29 505 507 509 510 512 513 514 515 517 518 5.9 520 521 523 523 523 534 525 526 527 528 529 •M 506 DB8 910 511 513 514 515 517 518 519 520 521 522 523 524 524 535 526 527 539 53(1 531 31 507 509 511 512 514 515 517 518 519 520 531 533 523 524 525 525 526 528 529 530 531 532 32 508 510 512 513 515 516 518 519 530 521 522 523 534 535 526 526 527 509 530 531 532 533 33 509 511 513 514 516 517 519 520 521 522 523 524 535 536 527 527 528 530 531 532 533 534 34 510 513 514 515 517 518 520 521 522 523 534 525 526 527 528 528 529 531 532 533 534 535 35 511 513 515 Big 518 519 521 522 523 524 525 526 527 528 529 529 530 532 533 534 535 536 36 512 514 516 517 519 520 522 533 524 525 526 527 528 529 529 530 531 533 533 535 536 538 37 513 515 516 518 520 521 523 524 525 536 :V>7 538 529 529 530 531 532 533 534 536 537 538 38 513 515 517 519 520 533 533 524 535 526 527 528 529 530 531 533 532 534 535 537 na M 39 514 516 518 519 531 522 524 525 528 527 528 529 530 531 532 532 533 535 536 538 539 539 40 515 516 518 520 521 523 524 526 527 528 529 530 531 533 532 533 534 536 537 538 in 540 41 515 517 519 521 532 534 525 536 538 529 530 531 582 532 533 534 535 536 537 539 510 541 49 5)6 518 520 521 523 534 526 527 528 539 530 531 532 533 534 535 536 537 538 539 540 542 43 517 518 520 522 523 535 526 tan 529 530 531 532 533 533 534 535 536 537 539 540 541 542 44 517 51 U 521 523 524 5S6 527 528 529 530 531 532 533 534 535 536 537 538 539 540 543 543 45 517 511 531 523 534 536 527 529 530 531 532 533 534 535 536 537 538 539 540 oil 542 543 46 cclvi WEIGHTS AND MEAN ERRORS. WEIGHTS AS DEPENDENT UPON 1 1 3 4 :. 6 7 8 9 10 11 12 13 14 15 16 17 18 10 20 21 22 23 47 1C!) 361 318 358 386 408 425 439 451 460 469 476 482 487 492 496 500 503 506 509 512 514 516 48 169 201 318 358 387 409 426 440 451 461 469 476 , 482 488 4!I2 496 500 5C4 507 510 512 514 516 49 169 861 3'.9 358 387 409 426 440 452 461 470 477 : 463 488 483 497 501 50! 507 510 5!3 515 517 50 169 361 319 358 387 409 438 440 452 462 470 477 483 488 493 497 501 505 508 511 513 516 518 • 169 301 319 358 388 410 427 441 453 462 471 477 484 469 494 498 502 505 508 511 514 516 518 54 169 961 319 359 388 410 428 443 453 463 471 478 484 490 494 499 503 506 509 513 515 517 519 66 1G9 361 319 3.' 9 388 411 428 442 454 464 472 479 4S5 490 495 499 503 507 510 513 515 518 520 58 169 363 330 359 389 411 429 443 454 464 472 480 486 491 496 500 504 507 510 513 516 519 521 60 169 363 320 360 389 411 439 443 455 464 473 480 486 492 497 501 505 508 511 514 517 519 522 6-2 169 363 320 360 390 412 429 444 455 465 473 480 487 493 497 501 505 508 512 515 517 519 522 64 170 363 320 361 390 412 430 444 456 465 474 481 467 498 498 502 506 509 512 516 518 520 523 66 170 362 331 361 390 413 430 444 456 466 474 481 488 493 498 503 506 510 513 510 519 531 523 88 170 262 321 361 360 413 430 445 456 466 475 483 488 494 499 503 507 510 514 517 530 522 524 70 170 263 331 361 391 413 431 445 457 407 475 482 489 494 499 503 507 511 514 517 520 522 524 72 170 263 321 363 391 413 431 445 457 467 475 483 489 495 499 504 508 511 514 517 520 523 535 74 170 3S3 321 362 391 414 432 445 457 467 476 483 489 495 500 504 508 512 515 518 530 523 525 76 170 263 323 3f>2 391 414 432 446 458 468 476 483 490 495 500 505 508 512 515 518 521 524 536 78 170 263 333 362 393 414 432 447 458 468 476 484 490 496 501 505 509 512 516 519 521 524 526 80 170 263 n 362 392 414 433 447 458 468 477 484 490 496 501 505 509 513 516 519 533 624 526 90 170 264 332 363 393 415 433 448 460 469 478 485 491 497 502 506 510 514 517 520 523 525 527 100 170 265 323 364 393 416 434 449 461 471 479 4tJ6 493 499 504 508 512 516 519 523 524 537 529 WEIGHTS AND MEAN ERRORS. two sets of Measurements — Continued. cclvii 24 26 20 27 28 29 30 31 32 33 34 35 30 37 38 39 40 42 46 48 50 520 523 533 525 526 529 530 531 532 533 534 535 536 537 538 539 540 542 544 47 520 522 :,•; i 525 527 530 531 532 533 534 5M 536 537 538 539 510 511 542 543 544 519 521 523 52 1 526 527 529 530 532 532 533 534 535 536 537 539 .,lii 542 543 544 49 520 522 523 _ 5-J5 527 528 529 531 532 533 531 535 530 538 539 539 541 543 543 544 545 50 620 532 524 526 527 529 530 532 533 534 535 536 537 538 5327 531 532 534 535 537 538 539 540 541 543 544 545 546 547 548 550 551 552 553 72 527 529 531 533 534 536 537 538 540 541 542 543 544 545 546 546 547 549 550 551 553 .V, 1 74 528 530 531 533 535 536 537 539 540 541 542 543 544 545 546 547 548 5 III 551 5S2 553 554 76 528 530 532 534 535 537 538 539 540 542 543 .-.14 545 546 546 547 548 550 551 552 5'3 554 78 528 530 532 534 535 537 538 540 541 542' 543 :. 14 545 546 547 548 549 551 553 554 80 529 531 533 535 537 538 540 541 542 543 544 545 1 546 547 548 549 550 552 553 554 556 557 90 531 533 535 537 538 540 541 543 544 51.) 546 547 548 549 550 551 552 553 555 556 557 558 100 Z 9° Cclviii WEIGHTS AND MEAN ERRORS. This table lias been employed alike to furnish weights for the determination of the places of a planet's center deduced from observations of the two limbs, and for the weight of positions depending on comparisons with a star. In the former case n and n' are the respective numbers of observations of each limb ; in the latter the one denotes the number of observations upon which the adopted declination of the star rests, and the other the number of comparisons. In order to combine the additional equations resulting from diameter-measurements with the other equations of condition, we may consider the weight of a pointing to a planet's limb as one-half that of a setting upon a star. Inasmuch as the equations are all formed with reference to the semidiameters, or one half the quantity actually measured, it is evident that we have merely to assign the unit of weight to each additional equation derived from a direct measure- ment. From the same assumption as to the relative precision of the two kinds of setting we perceive that the equations derived from indirect measurement are each entitled to one half the weight which belongs to the primary equations of condition to which they correspond. The same principles regulate the weights of the supplementary equations derived from micrometric observations upon the meridian. In these observations, however, it will be borne in mind that, from the nature of the case, only one comparison was possible. In combining absolute meridian determinations with the comparative measurements furnished by the micrometers of the equatorials, new difficulties arose. The most reasonable, as well as the simplest, course seemed to be to assign the weight unity to each meridian observation, con- sidering the resultant position as dependent upon the combination of one pointing to the object with one observation of the nadir. The errors of graduation are necessarily ignored. In the meridian observations at Athens the equator-point was deduced from the Jfars-culminating stars, and the consideration of the latitude thus eliminated. Yet an inspection of the various values of the equator-point will show that the resultant determinations can scarcely be entitled to claim a weight greater than unity. All consideration of the latitude is here eliminated. But for the other places at which meridian observations were made, any error in the adopted latitude will affect our result by its full amount. To obviate this difficulty as far as possible the same constant correction is applied to the meridian observations of the planet's declination which was previously found applicable to the measured declination of stars. These corrections are : Santiago MarsII — O."12 Cape of Good Hope, Mars I — 0."59 Cape of Good Hope, Mars II — l."32 Greenwich Mars I-}- O."10 Greenwich MarsII — O."06 For both series of Fenws-observations the corrections have been applied which were found for the Mars-SGTies. . There remain the observations at Kremsmiinster and Cracow, and the two of Venus I at Jtona, f,,r which no details whatsoever are given. These are necessarily to be omitted from the fundamental equations for the preliminary solutions. FUNDAMENTAL EQUATIONS. • § 11.— MNDAMENTA1 EQUATIONS. The various products of the coefficients having been duly formed and summed, we obtain the systems of final equations, which constitute the only source for all the deductions possible from the present investigation. They follow in their regular order. A. FINAL EQUATIONS FOR MARS I. 1. Santiago Equatorial. 245. 980 x + 50. 301 y + 66. 012 z — 65.862 v + 322.302 w + 195.44 =0 50.301X + 165. 077 y -j- 39.8111+ 16.342v-j- 39. 7CO w — 470.31 =0 66.01-3x.-j- 39.811y-f-32.841z— 17.828v + 80. 599 w— 48.93 =0 — 65.862X + 16. 342 y — 17. 828 z + 448.187V— 90.430 w — 3:>U. 49 =0 323.302 x + 39.760 y + 80.599 z — 90.420 v + 427.058 w -f 344.76 = 0 [nn]=2126.19 811. 460 t + 321. 364 n — 469.397 =U 324.364 t -f- 503.332 u — 717.614 = 0 [rm] = 1095.428 2. Washington Equatorial. 93. 950 X— 92.428 y -f 100.243 z — 36.292 w + 329.73 =0 — 92. 428 x + 250. 553 y — 211. 748 z + 39. 342 w — 616.86 =0 100.243 x — 211 .748 y + 222.347 z — 40.298 w -f. 498.27 = 0 — 36.2£l2x + 39. 342 y— 40.298 z + 14.215 w — 135.85 =0 [nnj=2074.59 76. 990 t + 120. 312 n— 248.693 =0 120.312 t-f- 189.217 u — 388.831 =0 [nil] = 976.024 3. Cape of Good Hope Equatorial. 156. 410 x — 114. 932 y + 75.039 z + 222.207 v + 221.511 w + 510.68 =0 — 114.932X + 187.576y — 103.827Z— 121.703 v — 169.220 w — 561 .X> =0 75.039X — 103.827y+ 69.424 z + 99.935 v -f 106.929 w + 316.13 =0 ' 222. 207 X — 121. 703 y-J- 99.935z-f-1509.463v-j-309.533iv-f538.il =0 221.511 x — 169. 220 y + 106. 929 z -f 309.533 v + 314.688 w -f 738.93 =0 [nn]=2136.65 103. 150 t + 170. 780 n + 20.102 =0 170. 780 t + 283. 620 u -f 31. 715 =0 [nn] = 47.116 4. Cape of Good Hope Meridian. » 46. tOO x — 29. 619 y -f. 21.694 z -f 64.792 w -f. 130.97 =0 — 29. 619 x + 54.230 y — 30.617 z — 43. KM w— 170.00 =0 21. 691 x — 30. 617 y + 21.778 z + 30.783 w + 93.80 =0 64. 792 X — 43.931 y -f 30.783 z + 91.590 w-f 191.60 = fl [im] =734.81 5. Greenwich J:'ijn4Sx+ 5.911 y — 4.382 z— 14. 102 w— 1.7-! [mil =51. 77 cc]x FUNDAMENTAL EQUATIONS. 6. Greenwich Meridian. 24.000X + 4.677 y + 26. 950 z + 17.000 1-14. 584 w- 11.50 =0 4.677 x + 67.389 y + 8.152 z + 2.9441+ 0.894 w - 139.70 =0 26.950 x + 8. 152 y + 58.878 z + 9.015 t- 14.748 w - 64.67 =0 17.000X + 2.944y+ 9.015 z + 19.000 t— 10.854 w + 6.80 =0 -14.5841+ 0. 894 y — 14.7481-10.8541+ 9.150 w- 3.41 =0 [nn] = 399.63 7. Cambridge Equatorial. 60.080 T— 59.593 y + 47.431 z — 0.9001— 1.006 ll — 37.988 w + 176.26 =0 — 59.5931 + 118. 579 y — 96. 401 z + 8.803 t + 13.557 ll + 41.064 w — 277.99 =0 47. 431 X- 96.401 y + 80.976 z- 8.774 t - 13 7S6 ll - 31.783 w + 220.35 =0 — 0.900X + 8.803y — 8.774 z + 31.020 t + 80.396 ll — 0.002 w— 12.58 =0 — 1.0C6X + 13. 557 y — 13. 796 z + 50.196 1 + 81. 958 ll — 0.307W — 17.86 =0 -37.988X+ 41.064y — 31.783Z— 0.0021- 0.31)7 ll + 2.1.011 w - 120.94 =0 [nn] = 796.07 21.7801+ 35.167u—15.78 = 0 35.1671 + 56.84411 — 25.84 = 0 [nn] = 20.03 8. Athens Meridian. 38.000X— 1.865y + 21.565Z+ 0.0001+ 0.330 ll — 11.854 w + 257.30 =0 — 1.865X + 53.921 y— 0.005Z + 0.0971+ 0.996ll+ 3.379 w — 170.98 =0 21. 565 x— 0.005y + 22.935z— 2.4051- 3.205U— 6.502 w + 131.85 =0 O.OCOX+ 0.097y— 2.405 z + 38.000 t + 58.062 n — 0.032w — 70.70 =0 0.330X+ 0.996y— 3.205 z + 58.062 t + 90.252 u — 0.123 w — 107.04 =0 — 11.854X + 2.379y— 6.502Z— 0.0321— 0.12311+ 3.758 W— 85.77 =0 [n,.] = 2543.616 We have here to combine eight systems of equations containing in -strictness twelve unknown quantities, viz : the x, y, z, W, common to all, the two v's for the micrometers of the Santiago and Cape equatorials, and the different values for both t and u in three several systems. The observations with the Greenwich equatorial were made by pointing to the estimated center ; so that the unknown corrections to the measured semidiameter find no expression in the final corresponding equations. With the Santiago, Washington, and Cape Equatorials, and the Cape Mural, both limbs were regularly observed ; so that the quantities t and u are here fully eliminated. There remain the measures with the Meridian-circles at Greenwich and Athens, and with the Cambridge Equatorial. But the impossibility of eliminating the influence of both t and u from the Greenwich meridian observations was, from the beginning, so palpable that only one has been introduced into the equations of condition. Our unknown quantities are thus reduced to eleven, and, of course, the first object is to diminish this number. as far as possible. The details and unsatisfactory issue of the attempt to discriminate between the influences which affect the measured diameters will be set forth in another place. For the present pur- pose it will suffice to say that the effort was utterly futile for every one of our planet-series, and that each new endeavor furnished only a new illustration of the impossibility of any such discrimination with the materials now in our hands. Most of the solutions furnished by the additional equations — whether these were independently discussed, or taken in connection with the fundamental equations containing terms dependent upon the same values — were illusory plays with figures ; and those concerning which such an expression would be too strong were clearly entitled to no confidence. After much labor devoted to this end the quantity u was finally ignored in all the equations, thus diminishing the number of unknown quantities by two. FUNDAMENTAL EQUATIONS. cclxi The Cambridge additional equations for semidiameter gave the values — t = — 8".583, u = + 5".823, or, after putting u = 0, t= + 0".V245, which latter value may be substituted in the Cambridge equations. Finally, in order to reduce the number of unknown quantities still farther, if possible, and for the sake of a general survey of the character of our materials, all the equations, excepting those derived from the Athens observations, were combined into one set containing seven unknown quantities, by simple addition of the analogous equations in each system. The solution afforded an indication of the admirable precision of Mr. Maclear's measurement of his micrometer-screw, the quantity v2 (100 times the correction to his adopted value) coming out as zero. The resultant values of x, y, z and w being substituted in the equation containing \_ff] in the Cape Equatorial series, this equation becomes — 1509".463 v2= + 0".402 V2 = + 0". 000266 which authorizes us to dispense with any farther consideration of this term. For the Santiago Equatorial this solution gave Vi = + 0".5TO for the Greenwich Circle, t = + 0".166 and for the Athens -Circle, t = + 1".927. Considering these last quantities as still undetermined, we hare but seven unknown quantities remaining, and our equations containing w assume the annexed form, which we may consider fundamental. FUNDAMENTAL EQUATIONS FOR MAES I. Santiago Kquatori.il . . . V\'a.sliin^Iiin Kqiiiitoiial . . Cape of Good Hope Equatorial Cape of Good Hope Meridian (!n rmvieh Equatorial . . . Grernwicli Meridian . . . Cambridge Equatorial Athens .Meridian 245.9801+ 50.301 y + 66.0121 93.950 x — 92.428 y + 100.243 z 15«- 6.6691- 8.887 n + 20.674 w- 19.874 =0 8.346 y- 6.669 z+ 27.000 t + 37.051 „- 0.424 w- 26.800 =0 X+ ' y~ 8-887l + 37-051t + «.333»+ 0.153W- 34.196 =0 - 5.949 y + 20.674 z- 0.4241+ 0.153 u + 35.383 W + 21 904 =0 [nn] = 793.80 FUNDAMENTAL EQUATIONS. Cclxiii Equatorial. 12.350 X — O.OfiDy -f 0.2-13Z — 5.2SG w+ 17.20 0 - O.C63X + 0.603 y — 0.0431 + 0.099 w — 0.39 =0 0.243 X — 0.0)3}- -f- 0.003 z — 0.108 w -f 0.37 =0 5.226 X + 0.099 y— 0.108 z + 2. 215 \v — 7.29 =0 [mi] — 25.51 17. 220 t + 2T>. 730 H — 42.817 =0 25.7361 + 38.46311 — 63.981 = 0 [nn] = 107.066 of Good H»i>c Jleritlltm. •IG.OOOx— • 6.618y + 16. 550 z + 55. 192 w+ 29.180 =0 . 6.016 x-f 41. 305 y— 9.743Z— • 8.399 w — 15G. 136 =0 16.S50X — 9. 7-13 y -f 12. 107 z -f. 1U.02I w + S7.336 =0 f>5.192x — 8.399y + 19.024 z +C6.SUS w+ 38.773 =0 [mi] = 632.69 GreemdfJt J/< riiliuv. 36.000l + 29.646y + 37.068Z— 21.216W — 83.70 =0 29. 646 x + 92. 658 y + 55.541 z — 13. 367 w — 309.97 : II 37.068 x + 55.541 y + 73,226 I — 19.344 w — 217.38 = 0 — 21. 216 x— 13. 367 y — 19.344 z + 12.809 w-f 32.08 =0 [nn] = 122 1.95 Kremsmunste.i- Mn-iilii.ui. 1:1.000 x + 14. 104 y + 10. 118 z + 6.638 w — 32.500 =0 14. 104 X + 25.300 y + 18.096 z + 6.448 w — 69.529 =0 10.118 x + 18.096 y + 13.944 z + 4.635 w — 53.038 =0 6.638 z+ 6.448y+ 4.635 z + 3.447 w — 14.028 =0 [nn] = 303.509 In this series we have seven systems of equations, if we retain the supplementary ones from the Santiago Meridian-circle as a distinct group by themselves, which is for the present the best course. These seven systems contain nine unknown quantities, viz : x, y, z, w in all the equations ; t, U; V in those from the Equatorial at Santiago ; tj, u2 in those from the meridian- circle at the same place. The quantities depending upon the unknown corrections to the semidiameter are already eliminated from the Washington observations, owing to the uniform observance of the rule always to compare both limbs of the planet with the comparison-star. Had other observers pursued the same course much labor and embarrassment might have been avoided. At the Cape of Good Hope, Greenwich, and Kremsmiinster, the center was estimated by the observer. In consequence of the considerations intimated when considering the final equations for Mars I, the quantities Up U, may be removed from all equations in which they occur, and the number of unknown quantities be thus reduced to seven. In the experimental solution, however, the correction of the semidiameter t = + 0".989GO, deduced from the additional equations for the Santiago Equatorial, was substituted, and both the quantities tj and U2 retained in the equations to be solved ; these latter being formed by simple addition of the correlative equations in each of the groups, excepting the one derived from Kremsmiiuster observations. This solution gave — v, = + 0".493 t,— -f 4 or uttiT uiiikiug vi> — 0 t, cclxiv FUNDAMENTAL EQUATIONS. Not substituting these values, but retaining the terms containing them for the sake of a value of V to be deduced from the totality of the Santiago Equatorial observations, and in hopes of arriving at some safer values of tj and t2, we have, as our fundamental equations— t<,itili;i'_Mi liqnalorial . . . S;'.tui:iL'!i Meridian . . . ^:uiti:ii:'> Mendiali 'u.-uppl.) . U'.isliiniMim Equatorial . . Cape of Good Hope Meridian (ir neieli Meridian . • . KteniMMiiu.-ter Meridian . . l>'iii,»] 2463.501 1483.290 221.760 306.552 393.620 4868.723 After one solution, the weight of the Cracow group was seen to be of a different order from the weights of the other series, and the results of these Cracow observations were consequently excluded. Solving anew, the following values were deduced, fully justifying the rejection : x = — 2". 6392 ± 0".3711 y = — 2".5401 ± 0".1265 z =+ 0".T759 ± 0".2192 w = — 0".1066 ± 0".1470 Santiago Santiago Washington Greenwich Total. Cracow equatorial. meridian. equatorial. meridian. meridian. // n // // /; M [m] 2463.50 1483.29 221.76 306.55 4556.88 ' 393.62 [nn.4] 457.10 248.60 56.59 46.30 808.59 258.54 1 ± 2.606 ± 2.433 ± 2.432 ± 1.887 ± 2.371 ± 4.642 P 0.828 0.950 0.950 1.578 1.000 0.261 The following weights, which differ but little from these, and resulted from a third solu- tion, were employed in the final multiplication. Santiago equatorial. Santiago meridian. Washington equatorial. Greenwich meridian. 0.889 0.859 0.859 1.600 FINAL SOLUTION. cclxxv § 13.— FINAL SOLUTION. For the attainment of our ultimate results, nothing now remains but the reconstruction of the normal equations, by multiplying them severally by their weights as deduced in the last section, discarding those series which are clearly incapable of increasing the precision of the values sought, and summing the others thus multiplied. The solution of the resultant equations will afford the best values of the unknown quantities which we are entitled to expect. The present section contains the multiplied equations for each series, together with their solution and the information thence deduced. From the first series of .Mars-observations the Athens group is excluded, and the remainder furnish equations as follows : MARS I. Normal Equations multiplied by their iveiylits. Santiago equatorial. Washington equatorial. Cape equatorial. Cape meridian. Greenwich equatorial. Greenwich meridian. Cambridge equatorial. Total. M 519.159 38.145 277.796 20.659 5.366 7.901 37.496 906.535 [at] M 106.163 139.321 680.233 — 37.527 40. 7UO — 14.735 — 204.128 133.27.) 393.420 — 13.302 9.743 29.099 — 1.411 1.146 — 4.413 1.540 8.879 - 4.801 — 37.199 26.602 — 23.708 — 185.857 362.659 1055.095 ["-] 348.402 101.728 333.149 24.355 2.866 22.184 74.005 906.689 M 84.023 83.915 — 85.973 15.973 — 184.405 - 300.547 — 13.750 — 19.730 — 1.574 1.576 2.6?3 0.294 — 60.164 25.628 — 259.160 — 192.891 M [«*] ltd [on] 69.312 170.108 BO 1.325 347.375 — 976.444 90.276 — 16.362 S.771 133.875 — 250.454 123.302 189.914 558.909 907. OiO — 997.000 9.781 13.695 41.134 58.820 — 76.349 1.045 — 1.168 3.760 — 0.267 — 4.437 19.382 — 4.855 3.012 — 4.859 — 46.173 50.537 — 19.836 15.609 109.598 — 169.512 363.635 331.626 1529.520 1551.548 — 2590.369 [en] — 120.892 638.229 202.305 — 55.157 561.471 1312.395 4-2.1 -.27 86. ('50 1.339 — 0.459 — 21.858 — 0.438 133 551 — 75.479 798.043 1905. 141 [«.] 4001.950 842.310 3794.850 330.010 14.070 130.770 505.850 9619.810 We hence obtain X = — 1".6688±0".0938 y= + 2". 8755 ± 0". 0378 z= + l".5885±0".0805 W = — 0".0762 ± 0".0621 and, consequently, Santiago equatorial. Wanhington equatorial. Cape equatorial. Cape meridian. Greenwich equatorial. Greenwich meridian. Cambridge equatorial. Total. // // 11 - „ „ ;/ // [,».] 1896.170 2074.590 2136.650 731.810 59.770 397.230 810.530 8109.750 J>,..4] 357.465 133.649 213.958 62.259 26.678 28.9-17 82.845 905.794 [,m.4] 169 371 329.156 120.467 138.627 !00.049 87.933 132.743 1078.346 t ± 0.837 ± i.uw ± 0.889 ± 1.817 ± 9.485 ± 2.097 ± 1.539 ± 1.002 Weight 1.434 0.274 1.270 0.304 0.16S 0.906 a.4M 1.000 P' 2.107 0.4U3 1.866 0.447 0.239 0.335 0.623 — in which Pl denotes the weight, expressed in terms of the unit used for P. cclxxvi FINAL SOLUTION. From the second series of .Mars-observations the Kremsmiinster group is excluded, and we have— MARS II. Normal Equations multiplied by their Weights. Santiago equatorial. Santiago meridian. Santiago meridian, Washington (supplementary.) equatorial. Cape meridian. Greenwich meridian. Total. [«] [at] 589.166 — 16.638 434.702 32.492 3.509 20.586 8.324 — 1.125 6.078 31.275 — 0.159 0.614 74.231 — JO. 680 26.707 24.667 20.313 25.398 760.155 — 4.780 514.085 l"g] 659.449 37.150 9. 486 — 13 203 89.064 — 14.537 767.416 [66] [4c] 1086.732 — 27.694 — 47.457 51.464 6.238 1.660 15.195 0.036 — 1.834 1.523 — 0.109 0.250 66.751 — 15.722 — 13.554 63.488 38.056 — 9.159 1285.153 0.805 — 70.094 [«] 540.717 23.511 8.001 0.020 19.537 50.173 641. 9,',9 [•*] tel 452.808 744.327 377.138 21.788 42.846 0.725 6.374 10.909 3.322 — 0.273 5.596 43.451 30.699 107.148 47.088 — 13.254 8.717 — 57.350 498.142 919.603 414.374 |[*»] — 3665.374 — 202.282 — 49.348 — 0.985 —251.960 —212.386 --4382.335 [m] b»] [TO] — 81.886 584.565 14246.980 — 22.977 11.247 989.916 — 7.582 6.726 228.046 0.935 — 18.416 64.444 44.113 82.588 1020.984 —148.976 21.981 837.259 — 216.373 668.672 17387.629 These give us — X — — 1".6785 ± 0".1643 y= + 3".4050±0".0445 z— + 1". 6438 ±0". 0925 W= + 0". 0427 ±0". 1334 Santiago equatorial. Santiago meridian. Santiago meridian, (supplementary.) Washington equatorial. Cape meridian. Greenwich meridian. Total. // ii n // /; // „ EM] 9556.240 2406.860 739.680 25.510 632.690 1221.950 14282.930 F[nn.4] 958.970 201.548 56.470 18.351 119.774 87.924 1443.037 [nn.4] 623.041 490.040 183.164 7.264 74.222 128.322 1506.053 1 ± 1.282 ± 2.556 ± 2.S22 ± 0.931 ± 1.329 rt 2.002 ± 1.578 Weight. 1.515 0.381 0.313 2.874 1.407 0.621 1.000 P' 1.602 0.403 0.331 3.039 1.491 0.657 — FINAL SOLUTION. For the first series of Venus-observations the multiplication gives us the annexed coefficients VENUS I. Normal Equations multiplied by their weights. The corresponding values are- z W + 0".4007 ± 0".24'07 + 1".4156± 0".0473 + 0"-1157 ± 0".1041 — 0".3780 ± 0".1272 Santiago equatorial. Santhgo Washington | Greenwich meridian. equatorial, j meridian. Altona meridian. Total. t«o] 529.033 35.587 25.525 6.347 2.000 597.492 M — 158. 9CO -- 4.621 — 28.408 2.762 4.564 — 184.603 [«1 813.414 45,554 41.721 10.195 4.174 914.058 [«*] 582.018 16.823 — 46.760 — 12.113 — 3 974 535.974 [it] 2029.652 113.879 104.303 25.487 10.434 2283.755 M — 300.240 — 11.S95 — 66.967 5.877 9.561 — 363.064 Pi] — 110.027 8.988 46.658 — 5.097 — 9.058 — 68.536 [ce] 1684.765 91.303 85.887 28.681 8.777 1899.413 [«*] 772.891 17.644 — 70.521 — 18.773 — 8.273 682.963 M C83.722 a. 790 87.824 29.665 7.905 818. 90S [«»] 43.141 110.141 — 36.327 4.334 — 2.500 118.789 [*"] —2690.280 —151.457 — 58.080 — 37.161 — 5.935 —3142.913 [en] 69.261 164.880 — 38.475 — 0.076 — 5.637 189.953 tl»] 12.494 39.596 71.637 — 16.917 4.833 111.643 [nn] 6657.458 662.965 409.373 117.478 5.770 6853.044 Santiago equatorial. Santiago . Washington meridian. equatorial. Greenwich meridian. Altona meridian. Total. II „ • // /• // [rtn] 2649.000 1304.060 829.180 373.470 5.770 5161.480 P[tm.4] P50 474 53-3.304 355.199 116.606 31.307 1885.890 [nn.4] 398.219 1047.047 719.451 370.697 31.307 2566.721 1 ± 1.278 ± 3.983 ± 3.884 ± 5.340 — ± 2.215 Weight. 3.002 0.309 0.325 0.172 — 1.000 pi 4.193 0.432 0.454 0.240 — — cclxxviii FINAL SOLUTION. Lastly, the second Fentfs-series furnishes, after exclusion of the Cracow group and combina- tion of the rest in the proportion of their weights, the following values for the coefficients, unknown quantities and residuals : VENUS II. Normal Equations multiplied by their iveights. Santiago Santiago Washington Greenwich Total. equatorial. meridian. equatorial. meridian. [<">] 63.363 39.529 11.652 27.204 141.748 [at] 52.607 IB. 722 — 10.085 16.284 77.528 [at] 84.054 39.481 20.241 26.881 170,087 [-4] 99.950 79.539 — 12.323 ~ 43.081 124.083 [»] 210.131 98.696 50.605 67.189 426,621 M 126.241 42.857 — 13.886 41.515 197.227 HI 74.198 33.001 8.484 —21.241 94.382 [«] 170.570 73.735 36,406 65.430 34G.141 for] 118.166 66.775 — 21.440 — 30.691 132.810 [«] 161.509 165,203 13.201 72.308 412.221 [an] 228.197 136.120 9.358 70.043 443.718 M 596.912 283. 762 79.013 164.362 1124.049 [en] 399.553 147.665 95.934 114.813 687.965 [*»] 351.023 283.540 — 14.318 —103.861 516.585 [nnj 31S9.278 1274.621 190 560 490.552 4145.011 X: y: Z : W — 2".492€ ± 0".3149 - 2". 4760 ± 0".1234 — 0".7160 ± (F.2040 — 0".1661 ± 0".1246 Santiago equatorial. Santiago meridian. Washington equatorial. Greenwich meridian. Total. it /; n // // • ["»] 2463.501 14C3.290 221.7GO 306.552 4475.103 P[nnA] 342.527 216.4CO 48.743 54.839 662.569 [nn.4] 385.431 251.897 56.723 34.270 728.351 e ± 2.393 ± 2.449 ± 2.436 ± 1.624 ± 2.146 Weight. 0.804 0.768 0.776 1.747 1.000 P' 0.888 0.848 0.857 1.929 — DIAMETERS. § 14.-DIAMETERS. The values of the semidiameters of Mars and Venus at the unit of distance, which have been assumed in the foregoing computations are as already stated in § 4. Mars, e = 4."6639 ; (OUDEMANS, Aslr. Nachr. XXXV, 351.) Venus, f = 8."6625 ; (WICHMANN, Aslr. Nachr. XXXII, 74.) Both these determinations are free from any error due to the thickness of the micrometer- threads, being derived from heliometer-observations. That for Mars was derived from a careful discussion of the measurements of Bessel from 1830 to 1837, published in the XXIII. part of the Kiinigsberg observations. The observations, having been made under a great variety of circumstances, and at greatly different distances, seemed well adapted for avoiding the influence of any constant of irradiation upon the result, and for detecting its amount. Prof. Oudemans found it impossible to bring the ellipsoidal form of the planet into the investigation, and the deduced value rests, therefore, upon the hypothesis of sphericity. Assuming a constant error in the measured diameter, and introducing this as au unknown quantity into the equations of condition, he found this error (which has been denoted by u in the present discussion) to be — 0".0267; and thence inferred both that no such influence of irradiation had affected the observations, and that no other essential constant error existed in them. The probable error of the semidiameter came out as less than one hundredth part of a second, or only one half as much as if the supposed irradiation had been ignored ; that of the deduced constant error was about one-third greater than its whole amount. The probable error of a single setting was 0."2975. The adopted value for the semidiameter of Venus was deduced by Prof. Wichmann from his own measurements, which had been also made with the Konigsberg Heliometer. The circum- stances under -which he observed were quite various, although the greater portion of the measurements were included within a period of two months. Some of the observations were made in broad daylight, some in the twilight, others still by night ; and the conditions were yet further varied by the employment of different magnifying powers, and sometimes of shade- glasses. Out of the eleven groups of comparisons the discordance of the extremes was but O."51 for the entire diameter, and the resultant mean, derived from sixty-four settings, appears entitled to much weight. No decided influence of irradiation was detected. In the Astronomical Journal III, 9, Prof. Peirce gives the results of a discussion of the semidi- ameters of Mars and Venus from the published observations with the Mural Circle of the Naval Observatory at Washington, in 1845 and 1846. His especial motive in the computation was to investigate the probability of the existence of any constant and spurious enlargement of the apparent disc, in consequence either of irradiation or of any other cause. He arrived at the curious inference that the constant quantity t was essentially the same for each of the two planets. His figures are as follows, Jf denoting the correction to the value in the Nautical Almanac. For Mars, t = 0."596 ± O."167 4 — O."0375 ± O."0086 For Venus, t = 0."554 ± O."107 J( = O."1397 ± O."0257 CclxXX DIAMETERS. i Assuming the value of t to be identical for the two planets, and combining the results with regard to their probable errors, Professor Peirce obtained the final determinations : t = 0."565 ± O."121 f = 5."055 ± O."101 for Mars e = 8."546 ± O."086 for Venus The discordance between these results and those deduced from Konigsberg observations cannot fail to attract attention. I had hoped that the large number of observations now under discussion would throw much light upon the source of these discordances, and did not consider it permissible, under the circumstances, to omit terms containing the two unknown quantities t and u from the equations of condition. One of these, t = ix + q, depends upon such influences as are peculiar to the observer and the instrument, comprising such portion of the irradiation as is constant, as also the personal error of the observer in setting, and any error in the assumed thickness of the threads. The other, u = t>( + ia} is simply the correction to the assumed semidiameter, and consists of the correction proper, together with such irradiation as may be practically inseparable from it when illuminated limbs are observed, or that which varies with the amount of light. These two terms are not strictly merged, the influence of one varying inversely with the distance from the earth, and that of the other being dependent on the brightness, and consequently on the radius-vector also. But in the entire absence of any proba- bility of trustworthy results should these be separated, both were brought into one term, having a coefficient inversely proportional to the distance from the earth. The earliest tentative solutions, in which these quantities were placed on the same footing with the others, suggested grave doubts as to the practicability of deducing satisfactory results even for t and u. It has been seen that in the subsequent solutions these doubts were too well confirmed ; so that it became necessary both to ignore one of the terms, by assuming one unknown quantity as inappreciable, and then to call the measured semidiameters to our aid for freeing the fundamental equations from the influence of the other one. For various reasons it appeared advisable to discard u rather than t, especially, since the variety of instruments and observers seemed to offer more opportunities for the elimination of the latter than the compara- tively small variation in the distance during the period comprised by any one of the four planet-series permits for the former. The deduction of any satisfactory values of the semidiameters from the Fundamental Equations being entirely abandoned, our only remaining reliance must be upon what were called in § 11 " Additional Equations," i.e., those derived from actual measurement of the diameters ; these measurements having been in a few cases direct, and in the others affected by the motion of the planet and by changes of parallax and refraction. But here, also, as has been already stated, the attempt to separate the two unknown quantities was unavailing ; and the only course is, here upon a small scale as in the whole investigation upon a larger one, to deduce from the materials before us such results as they are competent to furnish, and therewith to be for the present content. DIAMETERS. cclxxxi The equations are these : Equations from measurement of diameters. Planet-series and Instrument. [dd.] [*.] [dn.] [ee.] [en.] [»».] Mars I. — Santiago equatorial . . . 211.460 324.364 — 469.397 503.332 — 717.614 1095.428 Washington equatorial 76.990 120.313 — 348.693 189.217 — 388.831 976.024 Cape of Good Hope equatorial 103.150 170.780 20.102 283.620 31.715 47.116 Cambridge equatorial . . . 21.780 35.167 — 15.780 56.844 — 25.840 20.020 Mars II. — Santiago equatoriaJ . . . 313.620 427.593 — 310.360 588.809 — 428.790 351. 785 Santiago meridian-circle . . 4.000 5.908 — 3.070 8.730 — 4.564 2.696 Washington equatorial . . 17.220 25.736 — 42.817 38.463 — 63.981 107.066 Venus I. — Santiago equatorial , . . 13.480 24.601 — 14.176 44.923 — 25.824 15.725 Santiago equatorial (direct) . 41.680 94.203 — 20.099 224.107 — 42.479 20.654 Santiago meridian-circle . . 35.000 92.619 18.125 260.040 47.560 18.513 Washington equatorial . . 39.910 95.671 — 45.889 233.684 — 105.478 87.586 Venus II.— Santiago equatorial . . . 64.700 149.230 — 48.898 355.388 — 102.911 110.211 Santiago equatorial (direct) . 25.960 71.843 — 25.463 202.954 — 71.887 30.287 Santiago meridian-circle . . 45.000 116.343 12.905 312.751 45.095 41.957 Washington equatorial . . 18.200 37.113 — 28.813 76.065 — 60.112 51.802 The solution of these equations gives the results exhibited, in the table below, chiefly as a matter of curiosity and interest. It proves the attempt to separate the quantities t and u to be, at least in the present case, altogether futile. The two last columns give the resultant value of t upon the supposition u — 0, and that of u if t be ignored. Solution of equations derived from measurement of diameters. Series. Instrument. N°. of obs. ff [ww] [nn .2] t Mean error. U Mean error. (U=o) t (t-o) U Mars I . . Santiago equatorial .... 55 311 1095.428 52.465 +2.8580 ±0.3211 —0.4162 ±0.2082 +2.2198 +1.4257 Washington equatorial . . . 21 77 976.024 172.666 +2.9694 ±2.1655 +0.1650 ±1.3817 +3.2302 +2.0549 Cape equatorial .... 41 103 47.116 40.373 3.1804 ±1.1239 +1 .8032 ±0.6777 0.1949 0 mg Cambridge equatorial . . 8 22 20.020 6.496 — 8..1W3 ±3.6990 +5.8226 ±2.3014 +0.7245 +0.4546 Mart II . . Santiago equatorial .... 80 314 351.765 39.165 —0.3311 ±0.2013 +0.9688 ±0.1469 +0.9898 +0.7282 Washington equatorial . . . 5 17 107.066 0.831 — 28.8S81 ±15.5795 +20.9928 ±10.2977 +2.4865 +1.6634 Santiago meridian-circle . . 4 4 2.696 0.115 —9.5000 ±5.5340 +7.5000 ±3.9131 +0.7675 +0.5228 Mars I & II Santiago equatorial .... 135 525 1447.188 231.380 —1.3017 ±0.2454 +1.9459 ±0.1702 +1.4850 +1.0497 Washington equatorial . . . 36 94 1083.090 180.444 +1.9924 ±1.9288 +0.7097 ±1.2408 +3.0943 +1.98S8 Venus I . . Santiago equatorial .... 3 13 15.725 0.734 +4.2500 ±2.8271 —1.8077 ±1.5682 +1.0516 +0.5748 Santiago equatorial (direct.) . 11 43 20.654 10.186 +1.0773 ±0.3511 —0.2631 ±0.1514 +0.4822 +0.1895 Santiago equatorial (all) . . 14 55 36.379 12.766 +1.5252 ±0.2984 —0.4197 ±0.1351 +0.6214 +0.2539 Washington equatorial . . . 14 40 87.586 30.106 +3.6469 ±1.0345 —1.0419 ±0.4276 +1.1498 +0.4514 Santiago meridian-circle . . 35 35 18.513 9.116 —0.5890 ±0.3705 +0.0270 ±0.1360 —0.5179 —0.1829 Venus II . Santiago equatorial .... 26 65 110.211 64.546 +2.7909 ±0.7109 —0.8822 ±0.3033 +0.7558 +0.2896 Santiago equatorial (direct.) . 8 36 30.287 4.824 +0.0302 ±0.6169 +0.3434 ±0.221)7 +0.9809 +0.3542 Santiago equatorial (all) . . 34 91 140.498 77.292 +1.6473 ±0.5280 —0.3391 ±0.2128 +0.8002 +0.3131 Washington equatorial . . . 6 18 51.802 1.404 —5.6087 ±0.9704 +3.5247 ±0.4744 +1.5831 +0.7903 Santiago meridian-circle . . 45 45 41.957 36.752 +2.2487 ±0.6012 —0.9809 ±0.2281 —0.2868 —0.1442 VenusI&II Santiago equatorial .... 48 146 176.877 93.040 +1.4144 ±0.3230 —0.2873 ±0.1356 +0.7450 +0.293S Washington equatorial . . . 20 58 139.388 39.240 +3.1280 ±0.7672 —0.8067 ±0.3324 +1.2*55 +0.5346 Santiago meridian-circle . . 80 80 60.470 43.443 +0.7357 ±0.3845 — n.. cm ±0.1437 —0.3879 — 'J.1618 Z° 12 DIAMETERS. The equations deduced from measurement with the Santiago instruments may be slightly improved by introducing the new-found values of v. The original equations of condition derived from direct measurements were of the form when n represents the excess of the computed above the measured semi-diameters, The numerical value of the quantity \ ( d2 — #r) is to be increased (since the value of v is in both cases positive) by the amount f v = ft Am •=. fi r = fj. • -5J2- inasmuch as we may, without perceptible error, substitute for Am the computed semi-diameter. The numerical correction having the same sign as the measured semi-diameter, it is clear that the correction to be applied to n is negative, so that the corrected value will be , J_ A and we find [ n'n' ] = [nn] — 2[ew] ./*? + [ ee ] • (/^f)2 For those equations which are derived from direct measurements, the case is not quite so simple. We have in these instances n= it ± 5 £ («52 — dj — T Dt d + r Dt f and as before Am =r ^ (dt — 5j). We cannot now so boldly substitute the computed semi-diameter in the place of this quantity ; but a glance at the actual value of the new terms =F (r Vt d -- Dtp) will assure us that their small average value and constant change of sign render more precise computation altogether needless. The normal equations for semidiameter derived from Santiago observations are therefore to be modified by the introduction of n' instead of n; so that — [dn!] =n' = [dn] — [de] ^ [en1] •=. [en] — [ee] /zj [n'n'] = [nn\ — 2 [en] ^ + [ee] (//j)a The values of v, already obtained, were for the Santiago equatorial, +0".57, and for the Santiago meridian-circle, + 0".39 ; whence, Equatorial. Meridian-circle. f. P ft ft Mars, 4". 64 0.0057 0".0264 0".0181 Venus, 8 .662 0.0039 0 .0494 0 .0338 DIAMETERS. The previous equations from Santiago thus become — cclxxxiii [dd] [*] [dn] [ee] [en] [nn] Mars I. Equatorial .... 211.460 324.364 — 477.960 503.332 — 730.903 1133. 669 II. " .... 313.620 427.593 — 321.648 588.809 — 444.335 374.810 I and II. " .... 525.080 751.957 — 799.608 1092.141 —1175.237 1508.479 II. Meridian-circle . . . 4.000 5.908 — 3.177 8.730 — 4.722 2.864 Venus I. Equatorial .... 13.480 34.601 — 15.391 44.923 — 28.043 18.386 I. " (direct) . . 41.680 94.203 — 24.753 334.107 — 53.550 25.398 I. " (all) . . 55.160 118.804 — 40.144 269.030 — 81.593 43.784 II. " .... 64.700 149.230 — 56.270 355.388 — 120.467 121.246 II. " (direct) . . 25. 960 71.843 — 29.012 302.954 — 81.913 37.884 II. " (all) . . . 90.660 221.073 — 85.282 558.343 — 202.380 159.130 I and II. " (all) . . . 145.820 239.877 — 125.426 827.372 — 383.973 302.914 Venus I. Meridian-circle . . . 35. UOO 92.619 -j- 14.994 360.040 + 38.771 15.595 II. « .... 45.000 116.343 + 8.973 313.751 + 34.524 39.266 I and II. " . . . . 80.000 308.962 + 23.967 973.791 + 73.295 54.861 And their solution gives^ — N*. of obs. X [mw] [nn -2] t Mean error. u Mean error. u = 0 t t = o u Mars I. Equatorial . 55 211 1133.669 52.465 + 2.8580 ± 0.3211 — 0.3899 ± 0.2082 + 2.2603 + 1.4521 II. " . . 80 314 374.810 39.158 — 0.3314 ± 0.2013 + 0.9954 ± 0.1469 1 + 1.0256 + 0.7546 I and II. " . . 135 535 1508.479 231.375 — 1.3018 ± 0.2454 + 1.9724 ± 0.1702 + 1.5228 -f 1.0761 II. Meridian-circle . 4 4 3.864 0.123 — 9.5000 ± 5.5453 •f 7.5000 ± 3.9211 -f. 0.7942 + 0.5409 Venus I. Equatorial . . 3 13 18.386 0.734 + 4.2500 ± 2.8271 — 1.7692 ± 1.5682 •f 1.1418 + 0.6242 I. « (direct) 11 43 25.398 10.186 + 1.0773 ± 0.3511 — 0.2140 ± 0.1514 i -f 0.5939 -f. 0.2S90 I. " (»1I) . 14 55 43.784 12.764 + 1.5252 ± 0.2984 — 0.3703 ± 0.1351 | -f 0.7278 •f 0.3033 II. " . . 36 65 121.246 64.546 -f. 2.7909 ± 0.7109 — 0.8328 ± 0.3033 + 0.8697 + 0.3390 II. " (direct) 8 26 37.884 4.824 -f 0.0302 ± 0.6169 + d.3930 ± 0.2207 •f 1.1176 -f. 0.4036 II. " (all) . 34 91 159.130 77.290 + 1.6473 ± 0.5280 — 0,2897 ± 0.2128 + 0.9407 -f 0.3625 I and II. " (all) . 48 146 202.914 93.040 + 1.4144 ± 0.3230 — 0.2379 ± 0.1356 + 0.8601 + 0.3432 Venus I. Meridian-circle . 35 35 15.595 9.116 — 0.5890 ± 0.3700 + 0.0607 ± 0.1360 — 0.4284 — 0.1491 II. " 45 45 39.266 26.752 •f 2.2487 ± 0.6012 — 0.9471 ± 0.2281 — 0.1994 — 0.1104 I and 11. " 80 80 54.861 43.443 •f 0.7357 ± 0.3845 — 0.3964 ± 0.1437 — 0.2996 — 0.1280 cclxxxiv RESULTS. § 15.-RESULTS. The fruit of all the preceding researches may be presented in narrow compass. It consists of new values for the semi-diameters of Mars and Venus, and of the final value for the solar parallax. First, as regards the diameters : Were it possible to separate the two unknown quantities t and u, so that it might be palpable what portion of the apparent correction to the semi-diameters should be attributed to terrestrial influences, the determination of the magnitudes of Mars and Venus would be attended with comparatively small difficulty, so copious are the observations from which the semi-diameters might be deduced. But this obstacle interferes at the very outset ; and although the collection and consolidation of all the values of such quantities as may be supposed constant for any one instrument has been essayed in every form, the accordance of the results is in no degree com- mensurate with a priori theory. The determination of t (which comprises, 1st, the effect of personal equation in pointing ; 2nd, any error in the assumed thickness of the micrometer-threads ; and 3rd, any spurious increase of diameter by irradiation depending upon the instrument or other local causes) is only needed, apart from its interest and usefulness for analogous future investigations, in order that the influence of this source of error may be eliminated from our measurement of the actual semi- diameters. This measurement depends, in fact, upon our unknown quantity u ; which is the correction to the semi-diameter at the unit of distance, including, of course, any irradiation which, being proportional to the distance, may only be detected by means of occultations or transits across the solar disk. Confining the computation to observations made at Santiago and Washington, we may obtain final values for u by the adoption of either one of two different principles. First, and most naturally, we may combine according to their weights the values of u deduced from actual solution of the normal equations ; or, secondly, we may in like manner combine those values which correspond to the assumption t = o, and which are given in the last columns of the tables of solution in § 14 ; the weights being, in both cases, proportional to ?re~2. I give the results of each method of combination. First method. Planet. Instrument. u. P Santiago equatorial . _i_ i 9724 18133 + 0. 7097 61 Both + 1 9681 Vafua ..... Santiago equatorial . — 0. 2379 7941 Santiago meridian-circle — 0.3964 3876 Washington equatorial 0 8067 525 All 0 3118 RESULTS. Second method. cclxxxv Planet. Instrument. u. P- -f 1.0761 1187 4- 1. 9888 48 Both . + 1.1116 + 0. 3432 226 — 0. 1280 144 + 0. 5346 83 All 4- 0. 2287 It is manifest, at the first glance, that the results of the first method are those which we must employ ; and the remarkable discordance of the sign in the Few^s-measures with the meridian- circle illustrates the importance of allowing for the influence of the quantity t, even despite the embarrassments which attend the endeavor. We thus arrive at the definite values : // // // Semi-diameter of Mars — 4.6639 + 1.9681 = 6.63 Semi-diameter of Venus = 8.6625 — 0.3118 = 8.35, values which, although aifected with a very large probable error, would appear to be more trust- worthy than those heretofore employed. Lastly, the resultant value of the solar parallax is to be deduced, thus attaining the prominent end of the national Astronomical Expedition,- in the prosecution of which its earnest and devoted Superintendent has expended such unremitting effort and unceasing toil — rewarded by a mass of observations of high usefulness for the advancement of science, and most honorable to himself and his assistants — and among whose incidental results was the establishment and national adoption of the first permanent observatory in one of the great divisions of our globe. The four resultant values of w = ^ (the correction to Encke's determination) are now presented, together with the subsidiary quantities. Their diversity is striking ; but to me they seem to point unquestionably toward a decided diminution of the adopted value. The following table presents the case in a succinct form. The first column contains the deduced correction to be applied to the quantity, S". 57116. The number e in the second column is the mean error as given by the ordinary formula e= ^- ; where p = [gg .3J, and e0 = -/J^ is the mean error of a single observation whose weight is unity. It is evident that, since, in the primitive equations of condition, we had uniformly aa = a — 1, the sum [aa] taken after the multiplication of each equation by its weight, as explained in § 10, is equal to the whole number of these standard or unitary observations employed. This quantity e is, therefore, a much larger number than what is commonly called the mean error, being undivided by the cclxxxvi KESULTS. square root of the number of observations. The next columns show, first, the number of actual northern and southern observations, upon which the determination rests, irrespective of the relative value of these observations and of the number of comparisons from which they are severally derived ; and secondly, under the heading ir, the number of observations having the weight unity to which these are respectively equivalent. Lastly, the table shows the values of EO, the mean error of a unitary observation, and the quantity TJ, or weight of the corresponding value of }*• : N°. of obs. 71 1 &JT e £0 e2 N. S. N. S. Mars I . — 0.0762 0.0621 Ill 151 236.2 448.4 a 1.002 259.2 Mars II . + 0.0427 0.1334 60 214 61.4 534.8 i 1.578 56.2 Venus I . — 0.3780 0.1272 35 128 70.7 317.7 2.215 61.8 Venus II . — 0.1661 0.1246 39 73 46.6 117.3 2.146 64. 4 The first of these values, that derived from the observations of Mars during the first opposition, appears so far superior to the others in all the elements which can insure, and in all the indications which can manifest, precision, that I should feel far less hesitation in adopting it, to the exclusion of all the rest than in attempting to combine the values of the several series by any principle which I can devise. The determination necessarily depends, not upon individual observations, but upon what we may consider as couples of observations ; and no amount of thorough and careful work in the southern hemisphere can suffice to furnish means for a trustworthy deduction of the parallax beyond the limit which is prescribed by the number and quality of the northern observations. Only for the first opposition of Mars does the material furnished by the northern hemisphere suffice for a respectable determination ; and, with the sole exception of the Naval Observatory at Washington, no northern observatory has provided a single micrometric observation for any of the other series. The meridian observations, if they are to be compared for such delicate purposes, require corrections for error in latitude, or some form of personal equation ; — corrections which, if omitted or wrongly applied, leave our resultant values affected by their full amount, but which we have, nevertheless, no means of determining except from inadequate data, and by processes not very much better than groping. For all these reasons, no less than for the great intrinsic superiority of the observations as indicated by the mean error of an observation whose weight is unity, this first value — Jar = — 0".0762 ± 0".0621 seems to be of a different order of excellence from the rest, and not likely to be brought nearer to the truth by any combination with the others. Nevertheless, should it be thought best to combine the several values, the principles already developed in § 10 will assign to the three other series relative weights so insignificant as to amount to a practical corroboration of the views just expressed. We may namely determine the relative worth of the several determinations, as expressed by the number of standard obser- vations of the weight unity which would be requisite in order to attain the precision which belongs to each determination. For this purpose we will retain the hypothesis of § 10, /> = 5 ; so that IVnj—r-, P denoting the weight of a result deduced from n observations. RESULTS. cclxxxvii Let v be the number of observations requisite for attaining tbe degree of accuracy possessed by a given determination. We have then — _=l 0 where C denotes a constant, to be experimentally determined. Taking the first Jfars-series as the standard, and putting v = Ill, (the number of northern observations,) we find — Pm = 5.741 = 259.2(7; G= 0.022. With this value we determine v2 from the formula 6v' = .L 0.022 = 56.194 • 0.022, whence, v2= 1.30 or the worth of the value w given by the second J/ars-series is only 1.30 of just such standard observations as those of which 111 measure the worth of the value derived from Mara I. In like manner we shall find the value of w derived from the first Fewws-series to be worth 1.47, and that from the second series 1.55 standard observations of the weight unity. The difference of methods would afford a ground for the introduction of still another element of relative weight, the two planets being manifestly adapted in very different degrees for enabling an investigation of this kind to be successfully prosecuted. Indeed, the difference in the geocentric distance of the planets during the four series of observations is such as to render it quite warrantable to bring this also into the scale. If we determine the weights according to the ordinary method we shall have for the four series, respjctively, 286, 34, 22 and 25, provided that we consider the number of actual northern observations as being that upon which the determinations rest. But if, more strictly, we con- sider this number as being that of the unitary standard observations whose weight is unity, we find the weights of the four series to be, respectively, 613, 35, 44 and 30. These several principles of combination are illustrated in the annexed table, which gives the relative weights resulting from each. Calling the number of northern observations n', the number of southern ones n", and retaining the former notation in other respects, we have in round numbers : Relative Weights of the deduced values of the Solar ParaUax. n' + n" n' a e2 & e* Mars I . 679 288 613 111.0 Mars II . 154 34 35 1.3 Venus I . 101 22 44 1.5 Venus n . 72 25 30 1.5 How entirely disproportionate are the relative values of the several series, is sufficiently evident, even from the first column of the foregoing table, although this is the one which presents the heterogeneousness in the least unfavorable light. If, in the estimated relative weights, we introduce a factor to represent the opportunities for accurate measurement of the parallax which are afforded by the respective series, exclusive of cclxxxviii RESULTS. those peculiarities of detail which have already found expression in the computation, the dispro- portion will be yet further increased. The distance of Mars at the second opposition was greater than at the first by nearly 15 per cent ; the proximity of Venus to the sun was accompanied by serious disadvantages, and still other influences combined to render the first series upon Mars decidedly better adapted for attaining the desired end. All these considerations concur to support the opinion already expressed, that the results of the first Jfars-series should be regarded as the results of the expedition, and that the value J- = — O."0762 should be accepted as the best which the observations will afford. The combination of the three other series, independently of this first one, furnishes values indicating a much larger diminution, whatever method of combination may be employed. The four different principles for estimating the relative weight conduct to the four following values of *", as deduced from the second Jfars-opposition, combined with the two conjunctions of Venus. Weights. !.< in.icil. No. for reference. OlijiiCt. rtin'iioim'trr tiiui- of tnmsit. Mean nf win--:. Micr. Planet— Star. Bar. Thermoini'ti'r*. A. D. C. D. E. A a. A<5. Air. Wet. s. s. s. s. h. m. s. Rov. m. s. Rev. Inches. • • 47 Rumki'r . . 1IJ73 15.2 28.7 43.0 55.2 8.0 6 31 41.82 —6.39 28.104 67.4 59.4 48 M.irs . . . S.F. 4.7 18.0 31. 2 44.5 57.5 6 33 31.18 7.48 i 1 19.36 —1.09 •1!) 50 51 Kumkor . . 1673 Mara . . . N.P. Rumker . , 1673 54.0 43.0 7.5 55.0 37.5 20.7 8.0 50.5 33.5 21.0 3.7 46.5 34.0 10.5 6 35 20.44 6 37 8.00 6 38 50.45 7.40 7.48 8.07 1 47.56 0.08 Thrr. ntt. 68°. 5 Bar. red. to 32° F. 27.996 n Mars . . . S.F. 13.2 26.5 39.5 53.0 6.9 6 40 39.64 9.19 1 49.19 1.12 53 Rumker . . 1673 57.5 10.5 M.I 37.5 50.2 6 42 23.98 9.04 54 Mars . . . N.P. 46.0 58.0 12.0 25.5 38.3 6 44 152.16 —9.04 + 1 48.18 —0.00 Bernards. a Mars blazing unit very unsteady during these observa- tions. There being probably a mistake of 20m. in tin- linn', they are not incorporated in obtaining the b Observations generally better. c Good iiK'Ustircs. d Neglected to read micrometer. e Observations arc tolerably good. Results. Moan S. F. . . . Eight transits . . Mean N. P. . . . Eight transits . . h. m. s. . 6 5 44.49 . 6 9 2.14 m. a. • Rev. + 1 51.164 .... —1.239 . + 1 49.792 .... —0.296 . . / // . . =0 24.15 . . =0 5.77 h. ID. Corn'clion for chronometer at 6 6 Correction for chronometer at 6 9 A P. F. limbs in A. R. reduced to arc . . Variation of A. R. in 3m. 18s Observed P. F. diameter H. . . +7.36 . . +7.36 // . . 20.58 . . — 3.52 . . 17.06 h. m. s. . . 6 5 51 85 ..69 9.50 . . 3 17.65 A N. S. limbs micr. in rev. . . Variation of declination in 3m. 18s. . Corr. for diam. of micr. wires . . Observed N. S. diameter .... . 0.943 = 18.38 — 0.30 — 2.20 15.88 li. m. A o at 6 5 . 0.03 h. m. A o at 6 8 . 0.01 DECEMBER 11, 1849. £ D Chronometer time of transit. Planet— Star. Thermometers. e M in of w' Micr. Bar. <2J £ Object. A. B. C. D. E. A a. Ac!. Air. Wet. 0 s. 8. s. B. h. m. s. Rev. B. Rev. Inches. 0 . M 1 Mars . . . 8.P. 37.0 51.0 4.0 17.5 30.0 3 56 3.90 +9.47 28.068 70.3 58.5 2 liumker . . 1680 45.5 58.5 11.5 25.2 37.7 3 56 11.68 ±0.00 —7.78 +9.47 Ther. att °3a Mara . . . S.F. 30.0 46.5 59.5 12.5 3 58 46.27 +9.49 70°. 3 4 Rumker . . 1680 26.7 40.0 53.0 6.7 19.5 3 58 53.18 ±0.00 6.91 9.49 Bar. red. to 32° F. 27. Ml all Mars . . N.P. 48.5 2.5 15.5 29.0 42.0 4 1 15.50 +8.16 6 Rumki-r . . 1680 55.5 22.5 36.0 49.0 4 1 22.47 ().()() 6.97 8.16 7 Mars . . H.r. 21.5 34.5 48.0 1.0 4 5 34.65 +9.40 8 Ku raker . . 1680 30.0 13.0 57.0 9.5 4 5 43.27 ±0.00 8.62 9.40 9 Mars . . . N.P. 43.0 23.5 35.5 4 8 9.30 +8.36 10 Rumker . . 1680 51.5 5.0 18.7 31.5 44.5 4 8 18.24 ±0.00 8.94 8.36 11 Mars . . . S.I'. .v;. n 6.0 18.5 4 11 52.31 +9.34 12 Rumker . . 1680 35.0 48.5 15 15.0 27.7 4 12 1.54 ±0.00 —9.23 +9.34 4 OPPOSITION OF MARS, 1849-50, DECEMBER 11, 1849— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A I. Air. Wet. s. s. s. s. s. • h in.s. Rev. 8, Rev. Inches. • • 13 a Mars . . . N.F. 0.0 26.5 39.5 4 19 26.33 28.068 7J.3 58.6 14 Ituuikcr . . 1680 22. 0 48.0 4 19 34.88 —8.55 15 a 16 17 Mars . . SP. Rumker . . 1680 Mars . . . N.P. 37.7 33.5 1.0 59.5 • • 25.5 4 28 4.13 4 28 14.16 4 29 59.59 +8.42 10.03 Ther. an. 70°. 3 Bur rod. to 32" F. 27.951 18 Rumker . . 1680 56 0 23.0 • • 4 30 9.38 ±0.00 9.79 +8.42 10 Mars . . . 8.F. 41.5 7.5 . . 33.0 4 32 7.42 +9.37 30 Rumker . . 1880 4.0 30.0 4 33 16.88 ±0.00 9.46 9.37 21 Mars . . . N.P. 18.7 45.0 58.0 4 34 44.90 +8.30 22 Rumker . . 1680 • • 42.5 8.5 4 34 55.38 ±0.00 10.48 8.30 23 c Mars . . . S.F. 20.0 46.0 12.0 4 44 46.09 +9.30 24 Rumker . . 1680 • • 43.0 9.5 4 44 56.13 ±0.00 10.04 9.30 35 Mars . . . N.P. 51.0 1H.O 43.0 4 47 17.42 +8.10 36 Rumker . . 1680 15.5 • • 42.0 4 47 28.63 ±0.00 11.21 8.10 27 Mars . . . S.F. 27.0 53.2 19.5 4 49 53.32 +8.30 28 Rumker . . 1680 51.0 17.5 4 50 4.13 ±0.00 10.81 8.30 29 Mars . . . N.P. 40.2 7.0 33.0 4 52 6.82 +8.04 30 Rumker . . 1680 5.5 32.0 4 52 18.63 ±0.00 11.81 8.04 31 Mars . . . S.F. 24.5 , 50.5 16.5 4 54 50.59 —9.12 32 Rumker . . 1680 • • 48.7 15.0 4 55 1.73 ±0.00 11. 1-1 9.12 33 Mars . . N.P. 10.3 . . 35.6 . 4 57 36.15 ±0.00 34 Rumker . . 1680 35.0 • • 1.5 4 57 48.13 —7.99 11.98 7.99 35 d Mars . . . S.P. 34.0 . 0.3 25.5 5 0 0.02 ±0.00 36 Rumker . . 1680 58.5 24.5 5 0 11.38 —9.16 11.36 9.16 37 38 Mars . , . N.P. Rumker . . 1680 45.5 11.5 38.5 5411 .93 5 4 24.88 +7.98 ±0.00 12.95 7.98 • 40 Mars . . . S.F. Humker . . 1680 6.5 45.3 59.0 5 7 32.89 5 7 45.27 +9.06 ±0.00 12.38 9.06 41 42 Mare . . . N.P. Rumker . . 1680 56.7 . 36.5 • • 49.0 5 9 22.99 5 9 36.47 +7.96 ±0.00 13.48 7.96 43 44 45 -:i Tvuti»ns not vrry pond, M;ir- hrini! \ crv mistrady. No. 1680, Rumker, was observed throughout the evening by mistake, a Not incorporated into tin: means. t> Recorded 47,5s. at wire A. c.Mars uni-r rfflood observation. Results. h. in. a. Mean 8. P. . . Three transits . . . 4 4 30.29 Mean N. P. . . Two tiansUn . . . . 4 4 42.40 Mean N.P. . . Nine transit , . 4 56 18.85 Mean 9. F. . . Nine transits . . . . 4 59 16.59 Mean N.P. . . Five transits . . . . 6 2 24.01 McanS. F. . . Four transits . . . . 6 2 21.86 h. m. h. m. s. Corrcetion for chronometer at 4 4 . + 4.80 4 4 35.09 4 4 47 20 12 11 h. in. h. m. s. Correction for chronometer at 4 .56 . . + 4.70 Correction for chronometer at 4 59 . . + 4.70 Santia"o sid. time N. P. . . . . 4 56 23.55 Santiago sid. time S.I' 4 59 21.29 Interval . 2 57.74 H. Rev. / // — 8.543 .... +9.403 . . . . =3 3.26 7.955 .... 8.260 , . 2 40.99 12.084 .... 8.074 . . . . Q 37.36 11.403 .... 9.039 . . .' . 2 56.17 17.398 .... 7.740 . . . . 2 30.85 —16.187 .... +8.790 . . . . =2 51.32 A N. S. limbs micr. in rev . 1.143=22.27 Variation of declination in 12s. . . + 0.00 Corr. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 20.07 h. m. h. m. a. Correction for chronometer at 6 2 . + 4.88 6 2 28 59 Santiago sid. time S. F 6 2 26.44 2.15 A P, F. limbs in A. R. reduced to arc Variation of A. R. in 2m. 58s. . . ( )ii-rr\ nl l>. F. iliameter .... 10.21 + 3.21 13.42 A N. S. limbs micr. in rev 0.965 = 18.81 Variation of declination in 2m. 58s. . . +025 Corr. for diam. of micr. wires .... — 2.20 Observed N. S. diameter 16.86 A P. F. limbs in A. R. reduced to arc \::iMlinii nl'A. H. in 2s Observed P. F. diameter . h. m. A /> at 4 5 A p at 4 5 A p at 4 56 18.16 + 0.00 18.16 0.24 0.21 0.18 A N. S. liiuhs micr. in r< v. . MI iii 'fiivlmaiion in 9s. Corr. for cliam. of micr. wires Observed N. S. diameter h. m. A p at 4 59 A f> at 6 2 A f at 6 2 1.050 = 20.47 + 0.00 — 2.20 18.27 0.20 0.16 0.19 OPPOSITION OF MARS, 1849-50. DECEMBER IS, 1849. d u q V ! i i i Object. Chronometer time of transit. Mean of wirrs Micr. Planet — St:ir. Bar. Tlirrinnim tri^. A. B. 0. n. E. An. Ac!. Air. Wet. 8. a. B. a. s. h. m. a. Rev. m. a. Rev. Inches. • ° .Mars . . . N.I'. Kl.» 56.2 9.0 22.5 35.2 3 38 U.I8 +2.39 28.046 72.2 56.6 2 Rumker . . 1680 47.0 0.0 13.5 26.5 3 40 0.15 4.55 —1 50.97 —2.16 3 4 5 Mara . . . S.F. Rmnkcr . . 1680 Mars . . . N.I'. 27.7 11.0 41.0 30.7 24.0 54.0 43.5 37.0 7.5 57.2 50.2 20.0 10.0 3.0 3 41 54.04 3 43 43.75 3 45 37.04 0.94 4.23 1.82 1 49.71 3.29 Tl-er. an 71°. 0 l!;ir. red. in 32' I'1. 27. KM 6 Rumkcr . . 1680 2.0 14.7 28.0 42.0 54.5 3 47 28 24 4.20 1 51.20 2.38 7 Mars . . . S.F. 48.0 1.7 14.5 27 5 40.2 3 49 14.38 0.53 8 Rumker . . 1680 38.2 51.5 4.7 18.0 30.7 3 51 4.62 4.03 1 50.24 3.50 9 Mara . . . N.P. 54.7 8.0 21.0 34.5 47.5 3 53 21.14 1.44 10 Rumker . . 1680 1.0 13.7 27.5 39.7 3 55 13.87 3.69 1 52.73 2.25 11 a Mcia . . . S.P. 55.5 8.5 22.0 34.5 4 3 8.52 2.71 IS b Rumker . . 16CO • • 47.5 0.5 14.5 27.5 4 5 0.90 +4.25 1 52.38 1.54 13 a Mars . . . S.F. 43.0 57.2 10.2 24.0 36.8 4 8 10.24 — 1.33 J4i Rumker . . 1680 56.0 9.5 23.2 36.3 4 10 9.65 4.04 1 59.41 2.71 15 a Mars . . . N.P. 33.3 46.5 59.7 13.3 25.7 4 15 59.70 2.07 16 Rumker . . 1680 39.5 53.5 5.7 20.0 4 17 52.82 4.56 1 53.12 2.49 17a Mare . . . S.F. 32.0 45.5 58.5 12.0 24.5 4 19 58.50 0.40 18 Kumker . . 1680 37.5 50.5 4.0 17.5 4 21 50.77 3.17 1 52.27 2.77 19a Mars . . . N.P. 17.5 30.5 43.5 57.0 9.8 4 24 43.66 1.28 20 Kumker . . 1680 24.5 37.5 51.5 4.5 4 26 37.90 3.05 1 54.24 1.77 21 a Mara . . . S.F. 9.0 22.0 35.0 48.0 1.5 4 28 35.10 0.00 22 Eumker . . 1680 15.0 28.2 42.0 54.5 4 30 28.32 2.87 1 53.22 2.87 3a Mara . . . N.P. 42.5 55.5 8.5 21.5 34.5 4 33 8.50 0.83 24 Rumker . . 1680 50.5 3.5 16.8 4 35 3.51 2.42 1 55.01 1.59 25 a Mars . . . S.F. 43.0 P6.0 10.0 24.0 37.4 4 37 10.08 0.08 Me Rumker . . 1680 50.5 4.0 17.5 30.5 4 39 4.02 2.24 1 53.94 3.32 27 (i 28 39 Mars . . . N.P. Rumker . . 1680 Mars . . . N.P. 26.5 40.5 53.0 6.5 • • 4 41 53.29 0.20 19.5 32.5 45.5 59.0 19.8 4 53 45.26 2.86 30 Rumker . . 1680 29.3 42.0 55.7 8.5 4 55 42.25 4.81 I 56.99 1.95 31 Miirn . . . S.F. 57.7 11.0 23.7 37.5 50.0 4 57 23.98 1.49 32 Kumkcr . . 1680 6.5 19.2 32.7 45.5 4 59 19.37 4.45 —1 55.39 —2.96 33 34 Maw . . . N.P. Rumker . . 1680 55.0 8.0 20.7 34.2 47.2 5 1 21.02 —2.27 Remarks. a Observations by Lieutenant MacRae. b Omitted in the result-. f Not a good observation. ii I 'liable to perceive star. Results. ll. III. S. rn.s. Rev. / // Mean N. P. . . Three transits . . . 3 45 42.45 — 1 51.633 .... —2.263 . . . . =0 44.10 Mean S. F. . . Two transits . . 3 45 :14.31 1 49.975 .... 3.395 . . . 1 6.17 Mean N. P. . . Four transits . . 4 31 54. -J8 1 r.4.840 .... 1 950 0 38 00 Mean S. F. . . Four transits . . 4 ai 41'.. in — 1 53.705 ... 2 980 0 58 08 h. in. 8. b. in. s. Correction for chonometer at 3 46 . . . +2.03 Corri-ction for chronometer at 4 32 . . . + 1 .94 Coi nation for chronometer at 4 36 . . . . +1.93 AT SANTIAGO DE CHILE. DECEMBER lit, 1N4 (I ... Continued. Results — Continued. It. 111. 8. . 3 45 44.48 Pamiaeo sid. time for N. P. ... h. m. s. . 4 31 56.23 . 4 35 48.84 1 F 3 45 36 21 _" 8.24 3 52.62 A P. F. linilis in A. R. reduced to arc . \ ariatioll nf A. K. in 8s 24.87 . . — 0.14 . . 24.73 A N. S. limbs micr. in rev. . . , Variation of declination in 8s. . . Corr. for diam. of micr. wire . n . 1.132=22.06 0.00 — 3.20 .86 . 1.030 = 20.07 + 0.31 — 2.20 18.18 . . . . 0.09 A P. F. limbs in A. 11. reduced to arc . Variation of A. R. in 3m. 52s Observed P. F. diameter h. m. A (i at 3 46 . . . . . 17.02 . . + 4.20 . . 21.22 n . . . 0.06 A N. S. limbs micr. in rev. Variation of declination in 3m. 52s . Corr. for diam. of micr. wire . . . Observed N. S. diameter .... h.m. A f at 3 46 A o at 4 33 . 0.04 A p at 4 37 . . . 0.07 DECEMBER 13, 1849. 1 Chronometer time of transit. Micr Planet — Star. Bar. riiermometers. o.2 5 7 24.04 12.05 24 Mars . . . S.F. 45.0 58.2 11.5 34. 7 37.3 5 10 11.34 1.96 2 47.30 10.09 25 Hesx-l . • . 405 9.3 23.0 36.0 49.3 2.0 5 12 35.92 12.49 M Mars . . . N.P. 54.7 8.0 21.0 34.3 47.0 5 15 21 .00 3.44 2 45.08 9.03 27 I'.e^el ... 405 37.7 51.5 4.7 18.2 31.0 5 17 4.62 10.99 28 Mars . . . S.F. 24.7 38.0 51.0 4.5 17.2 5 19 51.08 B.88 2 46.46 10.11 29 Bessel . . . 405 31.5 45.0 58.0 11.5 24.3 5 21 58.06 11.41 30 Mars . . . N.P. 16.0 29.5 ffl.7 5G.O 8.7 5 21 42.58 2.34 2 44.53 9.07 31 Bessel ... 405. 2-1.0 37.5 50.7 4.2 17.0 5 26 50.68 11.77 9B Mars . . . S.F. 9.7 23.2 36.0 49.7 2.2 5 29 38.16 +1.69 +2 45.48 —10.08 10 OPPOSITION OF MARS, 1849-50. DECEMBER 14, 184U— Continued. « u Chronometer time of transit. Planet— Star. Thermometer?. g Meaii of wires. Micr. Bar. 1 Object. A. B. C. D. E. A a. Ai. Air. Wet. _ 6 s. s. H. s. s. 1). 111. S. Rev. 111. S. Rev. Inches. 0 0 tr. 33 Bessel ... 405 16.0 29.5 42. 5 58.0 8.7 5 31 42.54 +12.34 28.180 70.0 54.9 34 Mars . . . N.P. 0.0 13.2 26. a 39.5 52.5 5 34 26.28 3.25 + 2 43. 74 —9.09 j Tlier. att. 35 Bessel ... 405 43.0 56.3 9.2 23.0 35.7 5 36 9.44 12.59 70.°5 X Mara . . . S.F. 27.5 41.0 54.5 7.7 20.3 5 38 54.20 2.57 2 44.76 'l0.02 l!;ir. n-il. to 32° F. 28.066 37» Bessel ... 405 18.0 31.0 44.0 57.5 10.2 5 43 44.14 11.54 38 Mare . . . N.P. 0.5 13.2 26.6 40.0 53.0 5 46 26.66 2.67 2 42.52 8.87 39 Bessel ... 405 21.5 34.5 47.5 1.5 14.5 5 50 47.90 12.30 40 Mure . . . S.F. 4.5 18.0 31.5 44.8 57.5 5 53 31.26 2.33 2 43.36 9.97 41 Bessel ... 405 50.5 4.5 17.2 30.5 43.3 5 56 17.20 12.48 43 Mars . . . N.P. 32.2 45.5 58.5 12.0 24.5 5 58 58.54 3.99 2 41.34 8.49 43 Bessel ... 405 3.0 16.0 28.8 42.5 55.2 6 1 29.10 13.27 44 Mars . . . S.F. 45.2 58.5 11.5 25.2 37.7 6 4 11.62 3.43 2 42.52 9.84 45 Bessel ... 405 29.0 42.5 55.5 9.0 21.5 6 6 55.50 13.84 46 Mars . . . N.P. 9.5 23.5 36.5 49.5 2.5 6 9 36.30 5.10 2 40.89 8.74 47 Bessel ... 405 42.5 56.0 9.5 22.5 35.5 6 13 9.20 10.67 48 Mars . . . S.F. 24.5 38.0 51.5 4.5 17.0 6 15 51.10 0.77 2 41.90 9.90 49 Bessel ... 405 9.5 23.0 49.5 2.2 6 17 36.06 11.31 50 Mars . . . N.P. 49.5 3.3 16.0 29.5 42.5 6 19 16.06 2.48 2 40.00 8.83 51 Bessel ... 405 31.5 44.5 57.5 11.0 23.7 6 22 57.64 11.70 52 Mars . , . S.F. 25.5 38.5 52.0 4.5 6 25 38.51 2.09 2 40.87 9.61 53 Bessel . . 405 55.5 9.0 22.5 35.5 48.5 6 28 22.20 12.43 54 Mars . . . N.P. 35.0 48.2 1.0 14.5 27.5 6 31 01.24 +3.63 +2 39.04 —8.80 Remarks. The observations of to-night are not as good as those of yesterday, there being more unsteadiness in the atmospheie, and a less perfect definition of all objects. j. M. (J. a Recorded 52.0s. at wire D. 4 The remaining measures by Mr. MaeRae. Results. )l. III. S. in. s. Kev. / li Mean N. P. . . Fourteen transits . . 5 22 7.29 + 2 44.593 .... — 9.026 ... =2 55.93 Mean S. F. . . Thirteen transits . . 5 22 0.47 + 2 46.111 .... —10.060 ... =3 16.07 h. m. s. h. in. s. Correction for chronometer at 5 2-2 . . —3.77 Santiago sid. time N. P. . . . . . 5 22 3.53 Correction for chronometer at 5 22 . . —3.77 . . . 5 21 56.70 . . . 6.82 A P. F. limbs in A. R. reduced to arc . . . 22.77 1.034—20.15 Variation of A. R. in 7s . . — 0.12 Variation of declination in 7*. . . . — 0.01 Observed P. F. diameter . . 22.65 Corr. for tliam. of micr. wires . . . —2.20 Observed N. fl. dteineter . . . . . 17.94 h. m. , li. m. „ A p at 5 21 . . . 0.20 -ip.'i 21 . '. . 0.21 AT SANTIAGO DE CHILE. 11 DECEMBER 15, 1840. No. for reference. Object. Chronometer time of transit. Mean of wire?. Micr. Planet— Star. Bar. Thermometers. A. B. C. n. E._ A a. AJ Air. Wet. s. a. *. s. s. 1). in. s. Rev. m. s. Rev. Inches. • • 1 2 3 4 5 Bessel ... 405 Mitrs . . . N.P. 20.5 34.0 44.0 53.0 2.3 3.5 47.5 57.0 6.3 15.3 16.7 1.2 10.5 20.0 28.5 30.2 13.5 23.5 32.5 41.0 43.0 3 33 47.34 3 34 57.14 3 38 6.08 3 39 15.12 3 41 16.74 +8.92 4.10 9.42 3.50 9.48 + 1 9.80 1 9.06 —4.82 5.93 28.150 Tiler, ntt. 70°. 5 Bar. red. to 32° F. 28.036 70.0 58.5 Bessel . . . 405 Mars . . . S.F. Bi'sKi'l ... 405 38.5 48.5 50.3 6 Mars . . . N.P. 58.0 11.0 24.5 38.0 50.5 3 42 24.40 4.70 1 7.66 4.78 7 Bessel ... 405 13.2 26.0 39.5 53.5 6.0 3 44 39. 64 9.62 8 Mars . . . S.F. 21.5 34.7 48.0 1.2 13.7 3 45 47. S2 3.68 1 8.18 5.94 9 Hess •! . . . 405 17.3 31.0 44.5 58.0 10.5 3 47 44.26 9.72 ! 10 -Mars . . . N.P. 24.9 37.7 51.0 4.3 16.7 3 4850.92 4.95 1 6.66 4.77 11 Bessel ... 405 12.5 26.7 39.7 53.2 6.0 3 50 39.62 9.88 13 Mars . . . S.F. 21.7 36.0 49.0 2.7 15.2 3 51 48.92 3.95 1 9.30 5.93 13 Ilrssel ... 405 54.5 7.7 21.0 34.5 47.2 3 54 20.98 9.86 14 a Mars . . . N.P. 0.2 16.3 39.0 42.5 55.0 3 55 28.60 5.14 1 7.62 4.72 15 He>sel ... 405 42.0 55.2 8.2 21.7 34.5 3 58 8.32 10.02 16 Mars . . . S.F. 48.5 2.0 15.3 28.5 41.0 3 59 15.06 4.27 1 6.74 5.75 17 i;i'---i>l . . . 405 25.2 38.5 51.7 50.0 17.5 4 1 51.58 10.05 18 Mars . . . N.P. 30.5 43.7 56.5 10.0 22.5 4 2 56.64 5.33 1 5.06 4.72 19 liessel . . . 405 !8.0 31.3 44.7 58.0 11.0 4 4 44.60 10,23 20 Mars . . S.F. 24.2 37.5 50.5 4.0 17.0 4 5 50.64 4.53 1 6.04 5.70 31 Bessel ... 405 6.0 19.3 32.0 45.2 58.5 4 9 32.18 10.30 22 Mars . . N.P. 10.5 23.5 36.7 50.0 3.0 4 8 36.74 5.59 1 4.56 4-71 23 Bessel ... 405 45.2 58.7 11.5 25.5 38.0 4 10 11.78 10.34 246 Mars . . . S.F. 51.0 4.7 17.7 31.3 43.7 4 11 17.68 4.62 1 5.90 5.72 25 Bessel . . 405 38.7 42.0 55.0 8.5 21.2 4 12 55.08 10.49 36 Mais . . S.F. 34.7 47.7 0.5 14.0 26.7 4 14 0.72 4.76 1 5.64 5.73 27 Bessel ... 405 12.0 35.3 38.5 52.0 4.5 4 15 38.46 10.53 28 Mars . . . N.P. 16.0 29.5 42.3 55.7 8.5 4 16 42.40 5.90 1 3.94 4.63 39 llessel . . . 405 56.2 9.3 22.7 36.0 49.0 4 18 22.64 10.66 30 Mars . . . S.F. 1.5 14.0 27.7 41.2 54.0 4 19 27.68 4.98 1 5.04 5.68 31 HesM'l . . . 405 33.5 36.5 49.7 2.7 15.5 4 21 49.58 10.65 32 Mars . . . N.P. 26.5 40.0 53.0 6.5 19.5 4 32 53.04 6.06 1 3.56 4.55 33 34 Bessel ... 405 M;irs . . . S.F. 18.7 23.5 32.0 37.0 45.2 50.0 58.7 3.5 11.5 16.2 4 24 45.22 4 25 50.04 10.73 5.10 1 4.82 5.63 X> ll.'s-el ... 405 4.2 17.5 30.7 44.2 57.2 4 27 30.76 10.88 36c Mars . . . N.P. 7.2 21.0 33.7 47.0 0.0 4 28 33.78 6.21 1 3.02 4.67 37 Bessel ... 405 44.5 57.7 11.0 24.2 37.0 5 9 10.88 6.75 Wrf Mars . . . N.P. 44.0 57.5 10.5 24.0 37.0 5 10 10.60 2.30 59. r> 4.45 n 40 Ik.-sH ... 405 Mars . . . S.F. 18.0 18.5 31.0 31.7 44.0 44.7 57.3 58.3 10.0 11.0 5 11 44.06 5 12 44.82 6.58 1.06 1 0.76 5.46 41 llessei ... 405 56.0 9.5 32.2 X,.7 48.5 5 14 22.38 6.60 42 Mats . . . N.P. 56.7 9.3 32.3 35.7 •IK.fl 5 15 22.36 2.20 59.98 4.40 43 llessel . . . 40.1 38.3 51.7 5.0 is;3 31.0 5 17 4.86 6.66 44 Mai- . . . S.F. 39.0 52.5 5.5 18.7 31.5 5 18 5.44 1.33 1 0.58 5.43 43 llessel ... 405 21.0 34.0 47.0 0.5 13. 3 5 19 47.10 6.83 46 Mars . . . N.P. IS). 7 33. •> •lli.-J .,:i.. i U.3 .-. -ill -Hi. IK +4.36 -j — 1.47 12 OPPOSITION OF MARS, 1849-50, DECEMBER 15, 1849— Continued. S Chronometer time of transit. Planet— Star. Bar Thermometers. 1 Object. A. li. C. D. E. A a. A (5. Air. Wet. 6 s. s. s. s. s. h. m. s. Rev. m. s. Rev. Indies. „ „ 2 47 Besscl ... 405 16.0 29.3 42.5 55.7 9.0 5 22 42.50 +6.87 28.150 70.0 58.5 48 Mars . . . S.F. 16.0 29.5 42.7 56.0 8.7 5 23 42.58 1.38 +1 0.08 —5.49 ThT. att 49 Bessel ... 405 50.7 4.0 16.7 30.5 43.0 5 25 16.98 6.86 70°. 5 50 Mars . . . N.P. 49.0 2.5 15.7 29.0 41.7 5 26 15.58 3.43 58.60 4.43 Bar. reel. lu jy r . 28.036 51 Besscl ... 405 21.0 34.0 47.5 0.7 13.5 5 27 47.34 6.94 52 Mars . . . S.F. 21.0 3J.O 47.5 0.5 13.0 5 28 47.14 1.50 59.40 5.44 53 Bessel ... 405 3.3 16.5 29.7 43.2 56.0 5 30 39.74 7.04 54 Mars . . . N.P. 1.5 14.5 27.7 41.0 54.0 5 31 27.74 3.53 58.00 4.51 1 55 Bessel ... 405 48.0 1.2 14.0 27.5 40.2 5 33 14.18 7.07 56 Mars . . . S.F. 47.0 0.5 14.0 37.3 39.7 5 34 13.70 1.60 59.52 5.47 • 57 Bessel ... 405 22.0 35.5 48.5 1.7 14.3 5 35 48.38 7.11 58 Mars . . . N.P. 20.0 33.5 46.5 0.0 12.7 5 36 46.54 2.75 58.16 4.36 59 Bessel ... 405 57.0 10.2 23.3 36.7 49.3 5 38 21.30 7.18 60 Mars . . . S.F. 56.0 9.0 33.2 35.7 48.5 5 39 22.38 1.78 58.98 5.40 61 Bessel ... 405 48.3 2.7 14.5 27.7 40.5 5 41 14.74 7.29 62 Mars . . . S.F. 46.7 0.0 13.3 26.5 39.2 5 42 13.14 1.87 58.40 5.42 63 Besscl . . . 405 19.5 33.0 46.2 59.5 12.5 5 43 46.14 7.29 64 Mars . . . N.P. 17.0 30.0 43.0 58.5 9.5 5 44 33.20 2.96 57.06 4.33 65 Bessel ... 405 40 17.0 30.2 43.7 56.0 5 48 30.18 7.74 66 Mars . . . N.P. 0.5 13.2 26.5 40.0 52.7 5 49 36.58 3.30 56.40 4.44 67 Bessel . . . 405 2.5 15.7 29.0 42.5 55.3 5 51 29.00 7.68 68 Mars . . . S.F. 0.5 14.0 27.0 40.5 53.0 5 52 37.00 2.30 58.00 5.38 69 Bessel , . . 405 38.3 51.2 4.5 18.0 30.5 5 54 4.48 7.73 70 Mars . . .N.P. 34.2 47.7 1.0 14.2 27.0 5 55 0.82 3.35 56.34 4.38 71 Bessel ... 405 6.7 19.5 33.0 46.3 59.0 5 56 32.90 7.80 72 Mars . . . S.F. 4.0 17.0 30.3 43.7 56.5 5 57 30.30 2.33 57.40 5.47 73 Bessel . . . 405 29.0 42.5 55.5 8.5 22.0 6 1 55.50 7.90 74 e Mars . . . N.P. 35.0 38.5 51.8 5.5 18.2 6 2 51.80 3.54 56.30 4.36 75 Bessel . . 405 44.0 57.0 10.0 23.5 36.0 6 5 10.10 7.53 76 Mars . . . S.F. 40.5 53.5 5.5 19.0 31.5 6 6 6.00 2.11 55.90 5.42 77 Bessel ... 405 31.5 44.5 57.8 11.0 23.5 6 7 57.66 7.34 78 Mars . . . N.P. 25.5 39.5 53.0 6.5 19.2 6 8 52.74 3.29 55.08 4.05 79 Bessel . . 405 22.0 35.0 48.5 2.0 15.0 6 11 48.50 7.50 80 Mars . . . S.F. 18.5 32.0 45.0 58.5 11.5 6 12 45.10 2.30 56.60 5.20 81 Bessel . . . 405 38.5 52.2 5.0 18.5 31.0 6 15 5.04 7.59 82 Mars . . . N.I'. 33.0 46.5 59.5 13.0 26. 0 0 15 59.60 3.45 54.56 4.14 83 Bessel . . . 405 4.3 17.2 30.0 43.5 56.0 6 18 30.30 7.50 84 Mars . . . S.F. 59.5 13.3 28.5 | 39.3 52.5 6 19 26.22 j 3.36 56. 0-2 5.14 W Bessel . . . 405 0.5 13.8 26.7 40.5 6 21 26.92 7.68 86 Mars . . . N P 8.0 21.2 34.5 47.0 6 23 21.06 3.49 54.14 4.19 87 Bessel . . . 405 48.2 1.5 14.8 28.8 41.0 6 24 14.86 7.86 88 Mars . . . SF. 43.5 57.0 j 10.0 23.5 36.5 6 25 10.1(1 2.64 55.24 5.22 89 Bessel ... 405 5.0 19.0 32.0 45.7 58.0 6 27 31.94 7.33 90 Mars . . . N.p. 59.0 12.2 25.7 39.0 52.0 6 28.25.58 3.54 53.64 3.79 91 Bessel ... 405 39.5 53.5 6.5 19.8 32.3 6 31 6.26 7.92 92 Maiv . . S.F 35.0 48.5 1.5 15.5 31. S 6 33 1.66 +3.80 + 55.40 —5.12 AT SANTIAGO DE CHILE. 13 DECK9IBER 15, 18*9— Continued. Remarks. Observations prior to 5h. 8m. are by 110 means satisfactory ; the image of Murs bring tremulous as though floating in a basin of agitated mercury, and badly defined. a Then- was probably a slip of the telescope between c Tolerably good observation. wires A and It, occasioned by rapid turning of the d Observations tolerably good during the remainder of mi'-mriM-tiT screw. the series made by Mr. J. M. G. b Micrometer reading recorded -f 5.62. e Observed by Mr. MacKae. Results. h. m. s. in. s. Rev. / /. Mean N. P. . . Eight transits . . 4 3 14.38 + 1 5.532 .... 4.706 . . . . —1 31 72 Mean S. F. . . Nine transits ..43 37.07 1 6.747 .... 5.778 . . . . 1 £2.61 iMran N. P. . . Fourteen transits . . 5 47 44.31 56.934 .... 4.286 . . . . 1 S3. 53 MeanS. F. . . Fourteen transits . . 5 50 19.67 + 5S.020 .... —5.363 . . . . =144.50 Ii. m. s. b. m. s. Correction for chronometer at 4 03 . . . —5.48 Correction for chronometer at 5 48 . . . . —5.61 Correction for chronometer at 4 03 . . . . — 5.)8 Correction for chronometer at 5 50 . . . . —5.62 ll. ID. s. h. in. s. S;i ntiiri"o w. 35s. . . . . . + 2.85 Variation of declination in 2m. 35s. . + 0.14 OftstTved P 1? • diameter • • • • . . 19.14 Corr. for diain. of micr. wires — 2.20 Observed N. S. diameter .... 18.91 h. m. // h. in. « A o it 4 03 . 0 12 A p at 5 47 A p at 4 03 . . . . O.U . . 0 11 DECEMBER 16, 1849. No. for reference. Object. Chronometer time of transit. Wean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A A Air. Wet. 8. s. s. 8. B. h. m. s. Rev. .. Rev. Inches. • • 1 >l;ir- . . . N.P. 12.5 25.5 39.0 2 52 25.58 +4.10 28.116 74.1 59.4 2 Ili-sM-l . . . 405 47.5 0.7 14.3 2 53 0.71 5.00 —35.13 —0.90 3 4 6 .Mars . . . S.F. lli'.-.-i'l . . . 405 Mars N.P. • • 56.2 30.0 28.0 4.0 9.5 43.5 41.3 16.7 23.0 57.0 54.7 30.2 2 54 9.48 2 51 43.41 2 55 41.24 a 56 16.88 3.11 5.06 4.31 5.16 33.93 35.64 1.95 0.85 Ther. att. 74°. 0 Bar. red. to 32° F. 27.991 ll< —.•! ... 405 . . 7 Mars . . . S.F. 17.0 29.5 43.5 2 57 29.91 3.48 8 ... 405 52.5 5.7 19.3 2 58 5.74 5.23 35.83 1.75 9 MIIIS . . . N.P. 15.5 29.0 42.0 3 0 28.74 4.38 10 lii-ssel . . . ID.'. 51.7 4.5 18.5 3 1 4.81 5.23 36.08 0.84 11 Miirs . . . S.F. . 48.5 1.7 15.0 3 2 1 .64 3.43 12 : . . .405 23.2 36.3 50.0 3 2 36.41 34.78 1.82 13 Mar- . . . N.P. 27.7 40.7 54.0 3 3 40.71 'l.'T.I 14 I'.r-s,:! ... 405 • • 4.0 17.0 30.5 3 4 17.08 5.118 3U.37 0.79 15 Miirs . . . S.F. . 7.7 21.0 34.5 3 5 30.98 3.44 n; lle.-i-l . .405 42.5 56.0 9.3 3 5 55.84 +5.26 —34.86 —1.72 14 OPPOSITION OF MARS, 1849-50, DECEMBER 16, 1849— Continued. aJ V • • Chronometer time of transit. Micr. Planet— Star. Bar Thermometer*. £ f Object. A. B. C. D. E. Aa A :t SO 49.41 6.40 60 Bessel ... 405 16.5 29.2 4-2.5 3 51 29.31 7.00 39.90 0.60 61 Mars . . . S.F. 17.2 30.5 44.0 3 52 30.48 5.49 62 Ili's.-H . . 405 55.8 10.1 M.1 3 53 9.98 +7.06 —39.50 — 1.57 AT SANTIAGO DE CHILE. 15 l>i:< KMlSl.li Hi. 1849— Continued. No. for reference. Object. Chronometer tune of transit. ean of wires. Micr. Planet— Star. 1 Bar. hennoineters. A. B. C. D. E. A a. AS. Air. Wet. a. s. s. s. s. h. in. s. Rev. s. Rev. nches. • o 63 Mars . . . N.P. 10.0 23.8 36.5 3 54 23.10 +6.66 28.116 74.1 9.4 i;i I:,,M 1 ... 405 50.0 3.0 16.0 3 55 3.08 7.13 —39.98 —0.47 H a 67 c Mars . . . S.F. Besael ... 405 Mars . . . N.P. 47.5 38.3 16.8 0.5 40.7 29.5 14.5 54.0 43.2 • • 3 56 0.74 3 56 40.91 3 57 29.74 5.61 7.15 .79 40.19 1.54 IMT. att. 74°. 0 Bar. red. o 33° F. 27.991 68 Bcssel ... 405 0.5 13.5 26.5 3 58 13.41 7.31 43.67 0.52 69 Mars . . . S.F. 9.5 23.0 36.5 t 3 59 22.91 5.80 70 Bessel ... 405 • • 49.8 5.2 19.5 • • 4 0 4.74 7.34 41.83 1.54 71 Mars . . . NP. t t 44.5 57.5 11.0 4 0 57.58 6.89 72 Bessel ... 405 25.2 38.0 51.8 4 1 38.24 7.43 40.66 0.54 73 Mars . . . S.F. 32.5 45.5 59.2 4 2 45.64 6.03 74 75 76 Bcssel ... 405 Mars . . . N.P. 12.8 2.5 43.5 25.2 15.5 57.5 39.0 29.5 10.5 • • 4 3 25 58 4 4 15.74 4 4 57.08 7.38 7.10 7.60 39.94 41.34 1.35 0.50 Bessel ... 405 77 Mars . . . S.F. 43.0 56.0 9.2 4 5 55.98 6.09 78 Bessel ... 405 23.0 35.5 49.5 4 6 35.91 7.64 39.93 1.55 79 Mare . . . N.P. . 30.5 43.5 56.7 4 7 43.48 7.21 80 Bessel ... 405 • • 11.5 24.2 37.5 • • 4 8 24.31 7.79 40.83 0.58 81 Mars . . . S.F. 15.2 28.5 42.0 4 9 28.48 6.20 82 Bessel ... 405 • • 55.5 8.0 21.5 4 10 8.24 7.68 39.76 1.48 83 Mars . . .N.P. 55.8 8.5 32.0 4 11 8.67 7.31 84 Bessel ... 405 • • 36.5 49.5 3.5 4 11 49.74 7.86 41.07 0.55 85 Mars . . . S.F. 6.5 19.5 33.5 t 4 13 19.74 6.44 86 Bessel ... 405 46.5 0.0 13.5 4 13 59.91 7.89 40.17 1.45 87 88 Mars . . . N.P. Bessel . . . 405 38.o 19.5 51.2 33.5 4.5 46.2 • • 4 14 51.19 4 15 33.64 7.4« 8.01 41.45 0.55 89 Mars . . . S.F. 21.5 34.5 48.0 4 16 34.58 6.57 N Bessel ... 405 2.2 15.0 28.2 4 17 15.04 8.05 40.46 1.48 91 Mars . . . N.P. . 29.2 43.0 56.5 4 18 42.81 7.70 92 Be.ssel ... 405 11.5 24.5 38.2 4 19 24.64 8.19 41.83 0.49 9:i Mare . . . S.F. 58.0 11.3 24.5 4 21 11.14 6.67 94 Hi, -el . . . 405 38.5 51.8 5.5 4 21 51.84 8.36 40.70 1.69 MM Mars . . . N.P. 40.1 53.5 7.0 4 22 53.44 7.83 96 11. ssel ... 405 22.5 35.5 49.2 4 23 35.64 8.30 42.20 0.47 97 Mars . . . S.F. 26.3 39.5 53.5 4 24 39.68 6.82 98 Il.-ssel ... 405 7.5 20.7 34.7 4 25 20.88 8.27 41.20 1.45 99 Mars . . . N.P. 27.5 40.5 55.0 4 26 40.91 7.94 100 Besscl . . . 405 10.0 23.0 36.2 4 27 23.98 8.24 42.07 0.30 101 Mars . . . S.F. . 12.5 25.5 39.0 4 •-¥ 25.58 7.03 103 llrssel ... 405 54.0 6.8 ••!»..•> 4 29 6.91 8.45 41.33 1.43 103 1 M:irs ... N.P 57.2 10.2 23.5 4 30 10.21 8.06 104 Bessel ... 405 40.0 SI.O 6.S . . 4 30 53.08 42.67 0.39 tog • Miirs . . . S.F 41.5 54.3 7.5. 4 31 54.31 7.13 106 Bessel ... 405 aa.s 35.5 M.e 4 32 35 51 8.52 41.20 1.39 107 Mare ... N.P ,W.5 11.7 BS.O 4 35 11.64 8.27 108 H.'sscl ... 405 . . 41.5 54.7 s.u 4 35 5t.64 +8.80 —43.00 —0.53 OPPOSITION OF MAES, 1849-1850, DECEMBER 18, 1849— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— star. Bar. Thermometers. A. B. C. D. E. A a. A<5. Air. Wet. 6. s. s. 8. s. h. rn. s. Rev. s. Ri'V. Inches. • • 109 Mars . . . 8.F. 38.2 51.5 4.5 4 36 51.31 +7.42 28.116 74.1 59.4 110 llrssc-1 ... 405 20.0 33.5 46.7 4 37 33.31 8.88 —42.00 — 1.46 111 112 113 Mars . . . N P. Besscl ... 405 Mars . . . S.F. 14.7 58.0 54.5 28.0 11.5 7.7 42.0 25.0 21.0 4 38 28.14 4 ;,9 11.41 4 40 7.31 8.33 8.89 7.50 43.27 0.56 Tiler, ntt. 74° .0 liiir. ml. t.. 32° F. 27.991 114 115/ 116 Bessel ... 405 Mars N P 37.0 44.0 28.0 49.7 57.5 41.0 3.5 10.7 54.3 4 40 49.98 4 41 57.31 4 42 41.01 8.99 8.48 9.04 42.67 43.70 1.49 0.56 Bessel ... 405 117 Mars . . . S.F. 28.7 42.0 55.5 . . 4 43 41.98 7.57 118 Bessel ... 405 11.5 24.7 38.0 4 44 24.64 9.08 42.66 1.51 119 Mars . . . N.P. 37.2 50.5 3.7 4 4750.38 8.78 130 Bessel ... 405 21.2 34.5 48.0 4 48 34.48 9.28 44.10 0.50 121 Mars . . . N.P. t > 20.2 33.3 47.0 4 49 33.41 8.84 122 Besael ... 405 4.7 17.7 31.5 4 50 17.21 9.34 43.80 0.50 123 Mars . . . N.P. 55.5 8.5 21.7 4 51 8.48 8.89 124 Bessel ... 405 39.5 53.0 6.5 4 51 53.91 9.39 44.43 0.50 125 Mars . . . S.F. 38.0 51.5 4.7 4 52 51.31 7.99 126 Bessel ... 405 • • 21.5 34.7 48.0 4 53 34.64 9.39 43.33 1.40 127 Mars . . . N.P. 19.2 32.2 45.7 4 54 32.28 8.99 128 Bessel . . . 405 17.0 30.7 43.3 4 55 17.13 9.51 44.75 0.52 129 Mare . . . S.F. 11.0 24.2 37.5 4 56 24.14 8.12 130 Bessel ... 405 54.7 7.7 21.2 4 57 7.78 9.57 43.64 1.45 131 Mars . . . N.P. 48.3 1.2 14.7 ( t 4 58 1.31 9.15 132 Bessel ... 405 33.0 46.2 59.7 4 58 46.21 9.59 44.90 0.44 133 Mars . . . S.F. 30.7 43.7 57.2 4 59 43.78 8.22 134 Bessel ... 405 14.3 27.7 41.0 5 0 27.58 9.64 43.80 1.42 135 Mars . . . N.P. 9.5 22.5 36.0 5 1 22.58 9.28 136 Be*-scl . . . 405 • • 54.3 7.5 21.2 • • 5 2 7.58 9.77 45.00 0.49 137 Mars . . . S.F. 52.0 4.7 18.5 . t 5 3 4.98 8.30 138 139 140 Besst-l . . . 405 Mars . . . N.P. 36.0 38.0 13.3 49.0 41.0 26.5 2.3 54.0 40.0 5 3 49.01 5 4 40.91 5 5 26.51 9.73 9.38 9.85 44.03 45.60 1.43 0.47 Bessel ... 405 141 Mars . . . S.F. 11.3 24.5 38.0 5 6 24.51 8.50 142 Ressel ... 405 55.5 9.0 22.3 • • 5 7 8.84 +9.87 —44.33 —1.37 Remarks, The observations made by me, unless where otherwise stated, arc only tolerably good, both the planet and star having a wave-like motion, very fre- quently rendering it difficult to perfect a contact at the centre wire. J. M. G. a Good observation. d Recorded 8.0s. at wire D. l> The remaining measures by Mr. MacRae. e Good. c Not good, and not incorporated in tin1 IIIC;UIH. /' Micrometer recorded -f-7.48. Results. ll. HI. s. -. Rev. ' " Mean N. P. . . Thirty five transits . . 4 027.39 —40.532 . . —0.611 .... =0 11.91 Mi'an S. !•'. . . Thirty-four IraiisilK . 3 59 23. is —39.393 . . . -1.650 .... =032.16 AT SANTIAGO DE CHILE. 313 No. for reference. Date. Object. Observed transit reduced to mean of wires. Corrections for Apparent A. It. observed. Circle reading, mean of four microscopes . Refrac- tion. Nadir. Corr'n for semid. Oh-rrved il|)|rurnt decimation. Observer. Inst. Clock. la 2 3 4 61 6 7 8c 9 10, f 11 12 13 e 14 15/ 16 1 17 18 19g 20A 21 22 23 24 25i 26 27 38 • 30 31 32 33 34 35* 361 37 38 39 40m 41 n 42 43 44 o 45 p 1852. Feb. 4 7 8 9 10 11 13 14 15 16 h. in. e. s. 9. h. in. s. ° / // 302 5 57.63 301 57 9.25 307 53 8.40 301 47 55.53 301 51 12.46 301 57 3.95 301 59 53.55 303 42 17.15 301 48 24.43 301 48 0.43 302 5 57.45 301 57 5.15 303 42 17. J3 301 45 33.63 301 47 59.63 302 5 59.88 301 57 4.80 25 12 30.20 303 52 8.00 301 43 16.88 302 5 49.58 25 12 23.28 301 39 42.05 301 42 12.72 301 40 56.32 302 5 51.08 25 12 23.13 334 35 5.08 301 39 41.45 301 37 23.38 302 5 49.13 25 12 23.65 334 35 6.35 301 34 34.23 301 39 46.86 301 35 59.73 302 5 51.93 25 12 27.00 301 34 40.58 301 39 52.71 301 34 52.18 302 5 54.93 301 34 38.90 301 39 49.03 301 34 3.30 / // — 1 24.58 1 25.26 1 8.42 1 24.04 1 23.89 1 23.55 1 23.37 1 18.66 1 24.57 1 24.59 1 23.62 1 24.10 1 13.65 1 24.71 1 24.57 1 23.70 — 1 24.18 + 34.87 — 1 18.28 1 24.95 — 1 23.76 + 24.94 — 1 25.86 1 25.71 1 25. 7» — 1 24.45 + 25.09 — 35.33 1 25.52 1 35.65 — 1 34.17 + 24.99 — 25.23 1 26.23 1 25.94 1 36.15 — 1 24.52 + 35.12 — 1 26.33 1 26.04 1 26.32 1 24.61 1 26.07 1 25.79 -1 26.11 + J.I 0.2 1.5 1.2 9.8 7.9 9.6 6.3 4.7 + 4.9 '/ —6.5 -6.4 +6.4 -6.3 +6.3 6.9 6.2 +6.2 -6.1 +24 28 59.96 24 37 49. OS 18 41 33.03 24 47 2.42 24 4351.81 24 37 53.51 34 35 3.73 22 52 34.13 24 46 39.15 24 46 56.77 24 28 58.78 34 37 51.56 32 52 34.43 24 49 17.59 24 46 57.85 24 28 56.73 +24 37 52.29 —58 39 22.16 +22 42 34.59 24 51 38.68 +24 28 58.49 —58 39 33.91 +24 55 10.02 24 52 39.20 24 53 49.38 +24 28 59.58 -58 39 22.01 — 81 13.54 +24 55 8.58 24 57 20.58 +24 28 59.55 —58 39 24.13 — 8 1 16.61 +25 0 19.81 24 55 6.89 24 58 48.03 +24 39 0.40 —58 39 24.31 +25 0 15.16 24 55 2.74 34 59 57.35 24 38 59.09 25 0 16.38 24 55 5.97 +25 0 59.12 M. P. G. O. M. 0. G. M. G. M. u* Cancri .... 8 20 9.91 8 36 36.34 8 6 36.85 8 7 34.07 8 20 10.57 8 24 35 46 7 58 10.28 8 6 13 61 +0.775 .635 .721 .721 .773 .772 1.231 1.280 —20.33 20.35 20.97 20.97 20.97 20.97 21.55 21.56 8 19 50.34 8 36 16.63 8 6 16.60 8 7 13 82 8 19 50.37 8 24 15.26 7 57 49.96 8 5 53.33 Besscl ... 341 Mars .... S.P. v' Cancri .... 32 Cancri .... B. A. C . . . 2703 Mars .... S.F. llessel ... 341 8 12 4.31 6 20 10.44 7 58 10.63 8 4 54.28 8 6 36.52 812 4.57 8 20 10.70 9 13 33.33 7 44 35.75 8 3 41.11 8 12 6.14 9 13 33.59 7 55 38.47 7 59 47.11 8 2 27.33 8 12 6.68 9 13 34.37 9 20 43.49 7 55 39.97 8 0 11.36 8 12 8.27 9 13 35.19 9 20 43.81 7 55 28.71 7 55 40.89 7 59 7.73 8 13 9.13 9 13 35.49 7 55 29.08 7 55 41.29 7 58 6.87 8 12 9.38 7 55 29.44 7 55 41.57 7 57 10.33 1.273 1.276 1.218 1.268 1.212 1.260 +1.263 —1.468 + .616 .703 + .697 —1.017 + .723 .778 .778 + .770 -1.217 + .228 .476 .476 + .470 — .817 + .136 .198 .198 .253 + .350 — .456 + .226 .226 .383 .277 .250 .350 +0.253 21.56 21.56 22.04 22.04 28.04 22.05 23.05 22.07 22.53 22.53 22.54 22.56 23.06 23.06 23.06 23.07 23.10 23.10 24.29 24.29 24.29 24.32 24.32 25.06 25.06 25.06 25.07 25.09 25.44 25.44 25.44 25.44 25.82 25.82 -25.82 8 11 44.03 8 19 50.16 7 57 49.81 8 4 33.51 8 6 15.69 8 11 43.78 8 19 49.91 9 13 9.79 7 44 13.84 8 3 19.28 8 11 44.30 9 13 10.01 7 55 16.13 7 59 24.83 8 2 5.05 8 11 44.38 9 13 10.05 9 20 19.62 7 55 16.16 7 59 47.45 8 11 44.45 9 13 10.05 9 20 19.62 7 55 3.85 7 55 16.03 7 58 42.92 8 11 44.31 9 13 9.94 755 3.87 7 55 16.08 7 57 41.71 8 11 44.22 7 55 3.87 7 55 16.00 7 56 44.76 v* Cancri .... B. A. C. . . . 2703 Mars .... N.P. Bessel ... 341 A Cancri v1 Cancri .... 84 Geminorum . . . Mars .... 8.F. H. C. ... 15707 Besscl ... 341 Mar N.P. i Argus ..... H. C 15707 Mars .... N.P. Bessel ... 341 H. C 15707 Mars .... N.P. Besscl ... 341 H. C 15707 Mars .... N.P. Bessel ... 341 H. C 15707 Mara .... S.F. a X Cancri, 5th wire, -f 1.35 rev. = 4' 51".93. f> Mara S. P., 5th wire, — 2.05 rev. = 3' 16". 93. Recorded north limb. There is evidently an error in the R.A. of Bessel 341, not now explicable. c The axis was lowered during the afternoon, leaving the cast end high 0.72 div. and image of wire 1). i). 1 1 rev. west. d Bes»el341, nnrthofMars S. F., 0.86 rev. = 24".00. e The pulley being broken, the north roof door could not be opened. J Besscl 341, south of Mars 8. P., 5.23 rev. = 2' 26".00. g The azimuth was changed before observations. A Diameter of Mars, 0.50 rev. = 14".00. i Mars N. P., north of Besscl 341, 2.73J rev. = 1' 16".45. It H. C. 15707, 5th wire, + 2.09 = 5< 12' .63. 1 Mars N. P., 4th wire + 3.06 rev. = 1' 25".50. m U. C. 15707, 5th wire, + 2.07J rev. = 5' 12".13. n Mara N. P., south of Bessel 341, 0.41J rev. = 11".65. o H. C. 15707, 5th wire, + 2.00 reV. = 5' 10".13. p Mars 8. F., 4th wire, — 1.31 rev. = 36".60. 40 314 MERIDIAN CIRCLE OBSERVATIONS, 1851-52, » '55 a a • Corrections for , £ s «£ a a "I Apparent Circle reading, Kcfrac- Nadir. £ Observed E S; Date. Object. III A.K. mean of four lion, observed. : microscopes. & a apparent declination. 1 I x III Inst. Clock. 1 1 I gEB U O 1852. h. m. s. s. s. h. m. s. o , „ , /, a , I ° / // 1 Feb. 16 8 12 9.91 -J-0.302 —25.82 8 11 44.39 302 5 54.45 —1 24.36 -(-4.9 . . +24 28 59.12 M. 2 9 13 36.47 — .580 25.84 9 13 10.05 25 12 31.08 + 25.10 _ . . —58 39 26.97 3 (i Ilydrtc • . > 9 20 45.46 + .073 25.85 9 20 19.68 334 35 9.93 .— 25.37 ..—81 15.35 4 17 Besscl ... 341 7 55 29.85 .640 26.40 7 55 4.09 301 34 35.70 1 26.46 6.9 . . +25 0 17.97 P. So Mara .... N.P. 7 56 14.83 .041 26.40 7 55 49.07 301 32 59.30 1 26.55 . . +6.1 25 1 48.38 6 A Cancri . 8 12 10.21 + .688 26.40 8 11 44.50 302 5 53.05 --1 24.74 . . +24 28 58.90 7 l Argus . , . , > 9 13 37.39 — .920 26.43 9 13 10.04 25 12 29 33 + 25.11 . . —58 39 27.23 8 9 20 45.83 + .253 26.43 9 20 19.65 334 35 10.97 — 25.37 ..—81 18.39 1 18 Mars .... S.F. 7 55 24.85 .551 37.00 7 54 58.40 301 32 41.23 1 27.67 6.0 -6.0 +25 2 20.55 M. lot Bessel ... 341 7 55 30.36 .551 27.00 7 55 3.91 301 34 34.33 1 27.56 . . . . ' 25 0 21.34 11 8 12 10.76 .597 27.01 8 11 44.35 302 5 52.77 1 25.92 . . 24 29 1.26 13 ul Cancri .... 8 18 18.20 + .548 27.01 8 17 51.74 301 33 58.15 — 1 27.71 . . +25 0 57.67 13 t Argus . ... 9 13 37.90 — .874 27.02 9 13 10.00 25 12 28.70 + 25.56 . . —58 39 26.15 H a Hydra 9 20 46.49 + .202 27.02 9 20 19.67 334 35 11.60 — 25.79 • • . .-81 17.70 15 19 Mars .... N.P. 7 54 36.15 .259 27.11 7 53 9.30 301 32 3.75 1 26.45 3.5 +6.0 +25 2 47.31 P. 16 c Bessel ... 341 7 55 30 80 .259 27.11 7 55 3.95 301 34 34.08 1 26.31 . . 25 0 22.84 17 A Cancri ... 8 12 11.11 .309 ! 27.12 8 11 44.30 302 5 55.38 1 24.58 24 28 59.81 18 d «* Cancri .... 8 18 18.61 .314 j 27.12 8 17 51.80 301 33 57.40 1 26.3* . • • • 25 0 59.55 19 20 Mars .... S.F. 7 53 52.59 .311 27.59 1 53 25.31 301 32 10.33 1 26.21 2.9 —5.9 25 2 52.99 M. Ml Bessel ... 341 7 55 31.03 .255 27.59 7 55 3.70 301 34 38.16 1 26.07 . . . 25 0 19.12 21 A Cancri 8 12 11.46 .307 27.60 8 11 44.17 302 5 54.15 1 24.35 24 29 1.41 22/ »' Cancri .... 8 18 18.86 .311 27.60 8 17 51.57 301 34 59.28 1 26.05 • • 24 59 57.98 23 21 82 Geminorum . . . 7 40 10.13 .291 27.64 7 39 42.78 303 4 41.62 1 20.21 6.4 t . 23 30 6.30 P. 94 Mars .... N.P. 7 53 10.46 .302 27.64 7 52 43. 12 301 31 54.95 1 25.25 , f 5.9 25 2 52.11 25« Bessel ... 341 7 55 31.15 .246 27.64 7 55 3.76 301 34 37.45 1 25.10 . . . . 25 0 15.36 26 8 12 11.60 .298 27.64 8 11 44.26 302 5 53.45 1 23.51 • • • ' 24 28 57.77, 27 22 82 Geminorum . . . 7 40 10.26 .290 27.93 7 39 42.62 303 4 44.55 1 20.97 2.7 . . 23 30 7.83 6. 28 Mars .... N.P. 7 52 32.47 .301 27.93 7 52 4.84 301 32 13.42 1 25.91 . . 5.8 25 2 38.10 29 A Bessel ... 341 7 54 42.53 .301 27.93 7 54 14.90 301 35 7.42 1 25.74 . . 24 59 49.73 30 A Cancri 8 12 11.60 .297 27.94 8 11 43.96 302 5 55.83 1 24.06 24 28 59.64 31 23 82 Geminorum , . . 7 40 10.74 .288 28.22 7 39 42.81 303 4 45.50 1 21.55 4.6 23 30 5.56 P. 32 Mars .... N.P. 7 51 58.59 .299 28.22 75130.67 3013238.12 1 26.57 . . +5.8 25 2 12.16 33 Besscl ... 341 7 55 31.70 .246 28.22 7 55 3.73 301 34 38.68 1 26.45 . . . . 25 0 17.28 34 8 12 12.14 .285 28.23 8 11 44.21 302 5 55.52 1 24.86 24 28 58.85 35 24 82 Geminorum . . . 7 40 11.16 .295 I 28.71 7 39 42.75 303 4 43.25 1 20.80 4.7 23 30 6.96 M. 36 Mars .... S.F. 7 51 28.93 .306 28.71 7 51 0.53 301 33 26.80 1 25.65 . . —5.7 25 1 33.96 37 8 12 12.64 .304 28.72 8 11 44.22 ^^ *• ^ Rr* 1 23.88 +24 28 59.64 38. 25 a Canis Maj. . . . 6 39 6.93 .020 28.99 6 38 37.98 343 4 58.50 16.08 4.5 . . —16 31 12.81 P. 39 82 Geminorum . . . 7 40 11.44 .302 29.00 7 39 42.74 303 4 43.85 1 21.08 . . . . +23 30 6.84 40 Bessel ... 341 7 47 34.90 .314 29.00 7 47 6.21 301 31 54.00 1 26.04 . 25 3 1.65 41 Mars .... N.P. 7 50 50.54 .313 29.00 7 50 21.85 301 33 57.43 1 25.91 . , +5.7 25 0 52.39 42 B. A. C. . . . 2703 7 58 18.87 .297 29.01 7 57 50.16 303 42 12.72 1 19.22 • • • • 22 52 36.11 43 26 82 Geminoriun . . . 7 40 11.91 .278 29.40 7 39 42.79 303 4 43.42 1 20.17 +5.1 23 30 5.76 M. 44 Bessel ... 341 7 47 35.33 .291 29.40 7 47 6.22 301 31 52.20 1 25.07 . . 25 3 1.88 45 i Mars .... S.F. 7 50 37.57 +0.290 —29.40 7 50 8.46 301 35 5.23 — 1 24.90 • • -5.6 +24 59 54.28 a Mars N. P., 4th wire, + 3.45 rev. = 1' 36". 40. / Bessel 341, south of Mars 5.82 rev. = 2' 42" .50. 6 Besscl 341, 4th wire, + 4.05 rev. = 1' 53". 10. g v1 Cancri. Observed south, preceding star. c Bessel 341, 5th wire, — 3.72 rev. = 2' 30".33. h This was mistaken for Bessel 341, south of Mars N. P., 6.23 rev. d w1 Cancri. Double; observed south, preceding star. = 2' 54" .00. e Besscl 341, 5th wire, — 3.81 rev. = 2' 27".83. i Mars S. F., 5th wire, — 2. 19 rev. = 3< 13".03. AT SANTIAGO DE CHILE. 315 1 £ Si c o> E 5 Corrections for S I i ~ 2 Apparent Circle reading Refrac- Nadir. ° Observed £ 1 Date. Object. 111 ll| Inst. Clock. A. I!. obrcmd. mean of fou microscopes tion. apparent declination. 1 i 1 1 1853. b.m. s. s. s. . h. m. s. ° / ii / // „ „ « / II 1 Feb. 26 l Argus 9 13 39 94 —0.633 —29.42 9 13 9.89 25 12 33.88 + 24.65 +5.1 58 39 29.52 M. 2 a Hydra 9 20 48.97 + .047 29.42 9 20 19.60 334 35 12.05 — 24.88 • • — 8 1 18.16 3 27 82 Geminorum . . . 1 7 40 11.90 j .261 29.45 7 39 42.71 303 4 42.62 1 20.40 5.1 , t +23 30 6.79 P. 4 Bessel ... 341 7 47 35.34 : .274 29.45 747 6.16 301 31 53.88 1 25.37 25 3 0.50 So Mars .... N.P. 7 50 15.84 .272 : 29.45 1 7 49 46.66 301 35 59.71 1 25.15 . . +5.6 24 58 48.85 6 B. A. C. . . . 2703 7 58 19.23 .255 29.45 7 57 50.03 303 42 11.75 1 18.60 . . 22 52 35.86 7 28 82 Geminorum . . . 7 40 12.39 .330 29.92 7 39 42.80 303 4 45.08 1 21.63 5.2 23 30 5.46 M. 8 Bessel ... 341 7 49 8.31 .288 29.92 7 48 38.68 301 40 46.68 1 26.14 . . 24 54 8.37 9 Mars . . . S F 7 49 59 89 .289 99. 99 7 49 30.26 301 37 30.67 1 26.32 5.5 24 57 30.06 10 B. A. C. . . . 2703 7 58 19.88 + .325 29.92 7 57 50.28 303 42 14.00 — 1 19.69 . . +22 52 34.60 11 1 Argus 9 13 40.69 — .72fi 29.94 9 13 10.02 25 12 33.48 + 25.15 —58 39 29.72 12 a Hydra 9 20 49.54 + .059 29.95 9 20 19.65 334 35 13.08 — 25.38 • • • • — 81 18.79 13 29 82 Geminorum . . . 7 40 12.76 .112 30.28 7 39 42. S9 303 4 47.78 1 22.32 4.3 . +23 30 4.35 G. 14 Bcsscl . . .341 7 49 8.58 .119 30.28 7 48 38.42 301 40 46.43 1 26.88 . . 24 54 10.26 15 4 Mars .... N.P. 7 49 45.02 .064 30.28 7 49 14.81 301 38 34.90 1 27.00 • • +5.5 24 56 16.41 16 Mar. 1 Bessel . . .341 7 49 8.90 .006 30.33 7 48 38.58 301 40 42.78 1 25.19 3.8 24 54 12.72 G. 17 e Mars .... S.F. . 7 49 35.31 .006 30.33 7 49 4.99 301 40 28.58 1 25.20 —5.4 24 54 32.33 18 Bessel ... 3-11 7 55 33.64 .061 30.34 7 55 3.36 301 34 35.58 1 25.64 • • 25 0 20.37 )9 2 Bessel ... 341 7 49 9.58 .166 30.83 7 48 38.92 301 40 43.70 1 24.17 5.2 . 24 54 9.38 P. 20 d Mars .... N.P. 7 49 27.46 .221 30.83 7 48 56.85 301 41 51.56 1 24.28 +5.4 24 52 56.23 21 Bessel ... 341 7 55 34.44 + .222 30.83 7 55 3.83 301 34 33.62 — 1 24.68 . . . . +25 0 19.97 22 9 13 41.33 — .619 30.86 9 13 9.85 25 12 37.60 + 24.73 —58 39 32.92 23 a Hydra 9 20 50.49 + .002 30.86 9 20 19.63 334 35 13.43 — 24.96 • • • • — 8 1 19.56 24 3 Bessel ... 341 7 49 10.09 .224 31.17 7 48 39.15 301 40 45.05 1 25.25 4.8 +24 54 9.51 6. 25e , Mars ... N.P. 7 49 23.31 .279 31.17 7 48 52.48 301 43 48.85 1 25.08 . . 5.3 | 24 51 0.24 26* Bessel . . . 341 7 54 46.11 .225 31.17 7 54 15.17 301 35 1.38 1 25.68 • • • • 24 59 53.61 27 4 Mars .... N.P. 7 49 22.40 .335 31.51 7 48 51.23 301 45 49.02 1 24.72 5.3 5.3 24 48 59.21 P. 28 Bessel . . .341 7 55 35.14 + .281 31.51 7 55 3.91 Ml 34 34.82 — 1 25.34 . . +25 0 19.33 29 9 13 42.23 — .808 31.53 9 13 9.69 25 12 36.12 + 24.81 —58 39 32.12 36 a Hydrie . 9 20 51.20 4- .029 31.53 9 20 19.70 334 35 12.48 — 25.03 — 81 18.64 1 31 6 H. C 15401 7 47 8.94 T •u*4' .184 32.22 7 46 36.90 301 50 4.42 1 24.35 • 5.0 +24 44 49.04 P. 32/ Mars .... N.P. 749 29.97 .184 32.22 7 48 57.93 301 50 12.22 1 24.34 +5.2 24 44 36.03 33 Bessel . . .341 7 55 35.52 .130 32.22 7 55 3.43 301 34 36.40 1 25.20 • • • • 25 0 17.91 34 7 Mars .... S.F. 7 49 38.91 .479 32.36 7 49 7.03 301 52 52.30 1 25.06 5.5 -5.2 24 42 6.57 G. 35 Bessel . . .341 7 55 35.53 + .427 32.36 7 55 3.60 301 34 34.95 -1 26.07 . . . . +25 8 19.73 36 I Argus ' 9 13 43 24 —1.160 32.37 9 13 9.71 25 12 34.33 + 25.14 —58 39 30.86 37 a Hydra; ! 9 00 51.87 + .033 32.37 9 20 19.53 334 35 13.20 — 25.35 — 81 19.24 38 8 H. C 15412 7 47 29.71 .364 32.50 7 46 57.57 301 58 5.68 1 25.51 5.3 +24 36 48.64 P. 39f Mars .... N.P. 7 49 49.61 .364 32.50 7 49 17.47 301 55 7.18 I 25.67 . . +5.1 24 39 42.20 40 Bessel ... 341 7 55 38.00 + .369 32.50 7 55 3.87 301 34 37.10 -1 26.81 . . . . +25 0 18.52 41 i Argus 9 13 43.37 —1.016 32.50 9 13 9.85 25 12 35.55 + 25.33 . . . . -58 39 32.07 42 9 20 52.23 — .007 32.50 9 20 19.72 334 35 12.20 - 25.56 t t — 81 17.83 43 9 H. C 15412 7 47 29.74 + .270 32.50 7 46 57.51 . 301 58 6.75 1 23.57 +4.1 +24 36 46.83 G. 44 A Mars .... S.F. 7 50 4.41 +0.270 -32.50 7 49 32.18 301 57 59.75 -1 23.57 -6.1 +24 36 58.93 o Mars N. P., 5th wire, — 0.30 rev. = 4' 5" .83. / Mars N. P., south of H. C. 15401, 0.28 rev. =7".80. b Mars N. P., north of Bessel 341, 4.71 rev. = 2' 11».50. g Mars N. P., 4th wire, —6.39 rev. =2' 58".50. c Mars H. F., north of lleescl 341, 0.51 rev. = ]4".20. A Mars S. F., north of H. C. 15412, 0.25 rev. = 7".00. d Mars N. P., south of Bessel 341, 2.43 rev. = 1' 7".86. • This confirms the third observation of February 22, and the e Mars N. P., south of Bessel 341, 6.58 rev. =3' 3". 80. Ephemeris is presumed to be in error — 35". 1 316 MERIDIAN CIRCLE OBSERVATIONS, 1851-52. i 11 Corrections for •o \ 1 ** 0 Apparent Circle reading, Refrac- Nadir. S Observed 1 Date. Object. o> "S « FS.5 A. R. observed. mean of four microscopes. tion. £ c apparent declination. i l 5J1 Inst. Clock. •J. o i |lo o U 0 1852. h. m. s. s. s. h. m. s. o / // / it // ,7 o I II la March 9 Greenwich . . 485 8 50 58.47 +0.241 —32.50 8 50 26.21 304 50 34.68 — 1 15.26 + 4.1 +21 44 10.59 G. •1 Bessel . . .275 8 58 49.24 .234 32.50 8 58 16.97 305 28 23.83 ; 1 13.53 . . . • 21 6 19.71 it Bessel . . .275 9 5 0.69 + .229 32.50 9 4 28.42 305 55 36.65 '— 1 12.32 . . . . +20 39 5.68 4 9 13 43. J6 — .911 32 50 9 13 9.75 25 12 38.38 + 24.73 . -58 39 33.10 5 9 20 52.18 + .045 32.50 9 20 19.73 334 35 15.62 — 24.99 — 81 20.62 6 10 H. C 15412 7 47 29.81 .545 32.73 7 46 57.63 301 58 5.82 1 24.70 5.2 +24 36 47.79 P. It Mars .... N.P. 7 50 20.56 .543 32.73 7 49 48.37 302 0 32.72 i 1 24.56 +5.0 24 34 15.75 8 Greenwich . . 485 8 50 58.47 .501 32.74 8 50 26.23 304 50 35.12 1 16.13 . . . . 21 44 9.92 9 Bessel . . .275 8 58 49.39 .492 32.74 8 58 17.14 305 28 23.98 1 14.37 . . . . 21 6 19.30 10 Bessel . . .275 9 4 59.77 .431 32.74 9 4 27.46 305 57 8.23 1 13.14 . . 20 37 33.82 lie Bessel . . .275 9 5 0.81 + .431 32.74 9 4 28.50 305 55 38.02 —1 13.15 . . +20 39 4.04 12 t Anru9 ii . . 9 13 43.60 —1.129 32.74 9 13 9.79 25 12 37.58 + 25.03 —58 39 33.70 13 9 20 52.30 + .090 32.74 9 20 19.65 334 35 14.50 — 25.26 — 81 20.33 14 11 Mara .... S.F. 7 50 41.39 .077 32.89 7 50 8.58 302 3 39.88 1 24.63 4.5 —5.0 +24 34 19.36 M. 15 12 Mars .... N.P. 7 51 3.16 .403 32.97 7 50 30.59 302 6 25.75 1 23.84 4.4 +4.9 24 28 22.90 P. 16/ Bessel ... 339 7 51 32.52 .348 32.97 7 50 59.90 302 6 27.98 1 23.84 . . . . 24 28 25.57 17 Greenwich . . 485 8 50 58.81 .435 32.97 8 50 26.28 304 50 34.62 1 15.53 4.5 . . 21 44 10.52 18 Bessel ... 275 8 58 49.66 .358 32.97 8 58 17.05 305 28 21.75 1 13.79 . . 21 621.65 19 Bessel . . .275 9 5 1.13 + .353 32.98 9 4 28.50 305 S5 35.08 — 1 12.58 . . . . +20 39 7.11 20 9 13 43.81 —1.051 32.98 9 13 9.79 25 12 38.38 + 24.91 — 58 39 33.68 21 9 20 52.66 -1- Oil 32.98 9 20 19 69 334 35 13.58 — 25.13 — 81 18.74 S3 13 H.C 15401 7 47 9.81 T »"** .416 33.12 7 46 37.11 301 50 3.10 1 24.27 4.0 +24 44 51.28 M. 23 Mare .... S.F. 7 51 29.45 .412 33.12 7 50 56.74 302 9 44.50 1 23.21 , , —4.9 24 25 13.72 24« Bessel ... 339 7 51 32.56 .413 33.12 7 50 59.85 302 6 27.39 1 23.39 . . 24 28 26.11 25 Bessel ... 341 7 59 57.30 .419 33.12 7 59 24.60 301 42 13.38 1 24.79 3.9 . . 24 52 41.62 26 Bessel ... 341 8 6 48.91 .472 33.12 8 6 16.26 301 47 54.78 1 24.48 . . , . 24 46 59.91 27 8 12 16.74 .468 33.12 8 11 44.09 302 5 50.20 1 23.55 24 29 3.56* 28k Washington . . . 8 13 42.94 .413 33.12 8 13 10.23 302 5 28.40 1 23.58 . , . % 24 29 25.39 28 Bessel ... 344 8 28 47.68 .459 33.12 8 28 15.02 302 49 15.52 1 21.18 . . . , 23 45 35.87 30 Bessel ... 344 8 35 39.93 .449 33.12 8 35 7.26 303 20 19.52 1 19.83 , . 23 14 30.52 31 Bessel . . .344 8 40 50.89 .388 33.12 8 40 18.16 303 50 7.68 1 18.38 22 44 40.91 32 i Bessel ... 344 8 40 55.41 .387 33.12 8 40 22.68 303 52 44.09 1 18.26 , , . . 22 42 4.38 33 Bessel . . .278 8 49 27.71 .431 33.12 8 48 55.02 304 39 50.20 1 16.06 t . t f 21 54 56.07 34 Bessel . . .278 9 0 0.81 .425 33.13 8 59 28.11 305 5 24.80 1 14.92 t , . . 21 29 20.25 35 Rumker . . . 2799 9 8 13.59 .414 33.13 9 7 40.87 305 53 35.50 1 12.77 t 4 20 41 7.48 36 B. A. C. . . . 3181 9 )2 51.27 .348 33.13 9 12 18.49 306 51 53.20 1 10.28 19 42 47.29 37 14 Mara .... N.P. 7 51 56.29 .394 32.65 7 51 24.03 302 12 48.12 1 23.17 3.5 +4.9 24 22 0.76 G. 38* H.C 15608 7 53 11.06 .393 32.65 7 52 38.80 302 15 55.02 1 23.00 . , 24 18 58.59 39 9 3 53.08 + .364 32.64 9 3 20.80 305 37 24.18 I 13.61 +20 57 20.04 40 9 13 4:1.59 —1.349 32.64 9 13 9.60 25 12 36.92 + 24.88 5g 39 31.19 41 9 20 52.20 + .038 32.64 9 20 19.52 334 35 14 20 25.12 ' g i ig 47 42 15 H.C 15401 7 47 9.10 .198 32.72 7 46 36.58 301 50 5.32 1 25.31 + 4.8 +24 44 49.30 M. 43 Mare .... S.F. 7 52 27.77 .193 32.72 7 51 55.24 302 16 20.58 1 24.00 . —4.8 24 18 37.53 441 H.C 15608 7 53 11.04 .139 32.72 7 52 38.51 302 15 56.28 1 24.02 . . 24 18 57.05 45 Bessel ... 341 7 59 56.75 .145 32.72 7 59 24.18 301 42 13.95 1 25.94 . 24 52 41.30 46 8 12 16.36 .140 32.72 8 11 43.78 302 5 50 75 1 24 59 QA OQ 1 1 I 47m Washington . . . 8 13 42.46 .140 32.72 8 13 9.88 302 5 35.35 1 24 61 -i-1 JJ O.ltJ 24 29 18.57 48 Washington . . . 828 4.26 +0.190 —32.72 8 27 31.73 302 36 47.28 — 1 22.97 • • +23 58 5.00 a Greenwich 485, comparing star, January 8. g Bessel 339, 3d wire, — 2.10 rev. = 3' 17".ll. b Uesscl 275, comparing star, January 2. h Washington, 4th wire, — 0.78 rev. = 0' 21".80. c Bessel 275, comparing star, December 28. i Ilcssel 344, 3d wire, — 3.56 rev. = 2' 36".41. d Mare N. P., north of H. C. 15412, 5.35 rev. = 2' 29".41. /; II. C. 15608, south ofMars N. P., 6.69 rev. = y 6".90. e Bessel 275, south of preceding star, 3.23 rev. = 1' 30".21. I H. C. 15608, north of Mars S. F., + 0.87 rev. = (C 24".30. / Bessel 339, south ofMars N. L., 0.08 rev. — 0' 2".23. m Washington, 4th wire, — 0.55 rev. = 0' 15". 40. AT SANTIAGO DE CHILE. 317 8 |9 •d I § S Corrections for *3 1 £ Date. Object. S 5 ^2 A Apparent A. R. Circle reading, mean of four Refrac- tion. Nadir. V 1 Observed apparent fca £ £•§ 'f Inst. Clock. observed. microscopes. J? declination. 1 o XTv's s S f. o -° O 0 1852. h. m. s. s. s. h. m. 8. « / ii / ii „ H « / n 1 Mar. 15 Bessel ... 344 8 35 39.44 +0.182 —32.72 8 35 6.90 302 2021.22 —\ 20.73 + 4.8 . . +23 14 28.82 M. 3 Bessel ... 344 8 40 50.64 .177 32.72 8 40 18.10 303 50 8.42 1 19.23 , . . . 22 44 40.12 3 Bessel . . .378 8 47 58.83 .171 32.72 8 47 26.28 304 19 33.50 1 17.82 , , . . 22 15 13.62 4 Bessel . . .278 8 54 19.88 .164 32.72 8 53 47.32 305 0 40.48 1 15.90 . , . . 21 34 4.73 5 Bessel . . . 278 9 0 0.31 .164 32.ra 8 59 27.75 305 5 27.35 1 15.70 . , . . 21 29 17.66 6 Rumker . . . 2800 9 8 15.56 .153 32.72 9 7 42.99 306 7 0.58 1 12.93 . . . . 20 27 41.66 7 B. A. C. . . . 3181 9 13 50.70 .093 32.72 9 12 18.07 306 51 53.55 1 11.01 • • • - 19 42 46.77 8 16 Bessel ... 341 8 6 48.57 .438 32.41 8 6 16.60 301 47 54.58 1 25.34 6.2 t f 24 46 58.67 P. 9 Washington . . . 8 20 19.63 .375 33.41 8 19 47.60 302 25 15.22 1 23.32 . . . . 24 9 36.01 10 Washington • . . 8 28 4.33 .425 32.41 8 27 32.35 302 36 46.22 1 33.75 . . 23 58 4.44 11 Bessel ... 344 8 40 54.90 .353 32.40 8 40 22.85 303 47 33.22 1 19.14 . , . . 22 47 13.83 12 Bessel . . .378 8 47 58.83 .399 32.40 8 47 26.83 304 19 31.70 1 17.61 . . 23 15 13.82 13 Bessel ... 378 8 54 20.07 .389 32.40 8 53 48.06 305 0 38.72 1 15.65 , . . . 21 34 4.84 14 Bessel . . . 277 9 3 52.46 .382 32.40 9 320.44 305 33 0.40 1 14.17 , , . . 21 1 41.68 15 Washington . . . 9 8 47.23 + .316 32.40 9 8 15.15 306 19 9.88 — 1 12.11 . . . . +20 15 30.14 16 9 13 43.31 —1.236 32.40 9 13 9.67 25 12 37.85 + 25.01 58 39 34.95 17 9 20 52.10 — .018 32.40 9 20 19.52 334 35 13.60 — 25 24 — 81 20.45 18 18 Bessel ... 341 8 6 48.34 + .374 32.53 8 6 16.18 301 47 55.98 -1 27.72 5.8 ' ', +24 47 0.05 P. 19 Bessel ... 344 8 16 40.94 .423 32.53 8 16 8.83 302 9 50.92 1 26.49 . . . . 24 25 3.88 20 H. C 17513 8 46 0.63 .398 32.53 8 45 28.50 303 43 12.90 1 21.65 . , . . 32 51 37.06 21 Bessel . . . 278 8 52 45.82 .331 32.53 8 52 13.62 304 32 20.20 1 19.25 . . . . S3 3 27.36 22 Bessel . . . 275 8 58 49.23 .370 32.53 8 58 17.07 305 28 24.90 1 16.56 . , . , 21 6 19.97 23 Bessel . . .275 9 5 0.46 + .363 32.53 9 4 38.29 305 55 37.15 — 1 15.30 . . . . +20 39 6.46 24 9 13 43.39 —1.318 32.53 9 13 9.54 25 12 37.52 + 25.78 — 58 39 34.99 25 9 20 52.16 — .049 32.53 9 20 19.58 334 35 14.25 — 26.01 — 81 19.93 26 19 H. C 15608 7 53 10.83 + .379 32.69 7 52 38.52 302 15 57.00 1 24.79 4.1 +24 18 57.80 M. 27 Bessel ... 341 8 6 48.59 .331 32.70 8 6 16.22 301 47 57.80 1 26.49 . , 24 46 58.70 28 Washington . . . 8 28 35.71 .370 32.70 828 3.38 303 0 37.92 1 22.73 . . . . 23 34 14.83 29 Bessel . . .278 8 44 48.16 .302 32.70 8 44 15.76 304 1 17.38 1 19.87 , , , , 22 33 32.50 30 Bessel . . . 278 8 50 58.33 .345 32.70 8 50 25.98 304 50 36.30 1 17.46 , , , 21 44 11.17 31 H. C 18132 9 4 49.41 + .338 32.71 9 4 17.04 305 17 57.92 — 1 16.17 . . . . +21 16 48.26 33 9 13 43.20 —1.157 32.71 9 13 9.33 25 12 42.10 4- 25.47 —58 39 37.56 33 20 Washington . . . 8 28 35.89 + .383 32.95 828 3.32 303 0 35.90 ~ *w.-*« — 1 21.72 3.9 +23 34 16.03 P. 34 H. C 17513 8 46 0.61 .425 32.96 8 45 28.08 303 43 14.40 1 19.56 . , 22 51 35.37 35 Bessel . . .278 8 52 46.30 .358 32.96 8 52 13.70 304 32 20.00 1 17.12 , . , . 22 2 27.33 36 Bessel ... 375 8 58 49.53 .398 32.% 8 58 16.97 305 28 23.38 1 14.50 . . . 21 6 21.33 37 Bessel ... 375 9 5 0.87 .390 32.96 9 4 28.30 305 55 36.88 1 13.27 . . . . 20 39 6.60 38 Bessel . . .275 9 10 54.86 + .327 32.96 9 10 22.23 306 32 20.00 — 1 11.82 . . . . +20 2 22.03 39 9 13 43.75 —1.370 32.96 9 13 9.42 25 12 40.65 4- 25.11 — 58 39 35.55 40 9 20 52.47 + .017 32.96 9 20 19.49 334 35 14.35 T *"• — 25.33 — 81 18.81 41 22 Washington . . . 8 20 20.05 .341 33.22 8 19 47.17 302 25 11.38 1 23.08 5.5 ', '. +24 9 40.31 P. 42 Washington . . 8 28 36.03 .333 33.22 8 28 3.14 303 0 34.18 1 21.31 . . . . 23 34 15.74 43 Bessel . . .378 8 47 59.31 .366 33.22 8 47 36.46 304 19 31.82 1 17.51 . . . . 22 15 14.30 44 H. C 18132 9 4 49.80 + .351 33.22 9 4 16.93 305 17 53.90 1— 1 14.76 . . +21 16 49.47 45 9 13 43.84 —1.320 33.22 9 13 9.30 25 12 40.18 + 24.98 —58 39 36.55 46 9 20 52.70 — .065 33.22 9 20 19.41 334 35 15.25 — 25.25 — 8 1 21.39 47 33 Bessel ... 339 7 51 32.68 +0.451 -33.41 7 50 59.72 302 6 26.60 — 1 24.33 + 5.1 • • +24 28 26.74 M. • 318 MERIDIAN CIRCLE OBSERVATIONS, 1851-52. s .t: a a g Corrections for 13 1 1 •" o Apparent Circle reading, Refrac- Nadir. V Observed 's Date. Object. •=•5 j A. R. mean of four tion. o apparent s J ££.g observed. microscopes C declination. t £ If* Inst. Clock. fc 6 5 o 1852. h. m. s. s. s. h. m. s. 0 / // / // ii „ o / ;; 1 Mar. 23 Washington .... 8 21 28.44 +0.444 —33.41 8 20 55.47 302 29 17.42 — 1 23.36 + 5.1 . . +24 5 34.95 M. 2 Washington .... 8 30 44.88 .433 33.41 8 30 11.90 303 10 28.52 1 21.28 . . . . 23 24 21.77 3 Bessel ... 278 8 44 48.48 .471 33.41 8 44 15.54 | 304 1 12.80 1 18.83 . . . . 24 33 35.04 4 Bessel ... 275 9 5 0.28 .386 33.41 9 4 27.26 305 57 5.05 1 13.43 . . 20 37 37.39 (a Bessel . . . 275 9 5 1.21 + .386 33.41 9 4 28.19 305 55 33.75 — 1 13.50 . . +20 39 8.76 6 9 13 44.09 —1.493 33.41 9 13 9.19 25 12 40.08 + 25.14 —58 39 36.21 7 25 Bessel ... 341 7 55 48.73 + .538 33.25 7 55 16.02 301 39 43.35 — 1 25.43 5.0 +24 55 11.19 M. 8 Washington .... 8 20 20.28 .532 33.25 8 19 47.56 302 25 11.82 1 23.15 1 24 9 40.44 9 Washington .... 8 30 44.64 .580 33.25 8 30 11.97 303 10 30.58 1 20.78 . . . . 23 24 19.31 10 Bessel ... 278 8 44 1.08 .517 33.25 8 43 28.35 304 1 16.70 1 18.39 . . . , 22 33 30.80 11 J Bessel ... 278 8 44 48.44 .517 33.25 8 44 15.71 304 1 18.40 1 18.39 . . 22 33 29.10 12 c Bessel ... 278 8 46 31.24 .515 33.25 8 45 58.51 304 12 7.12 1 17.86 . . . . 22 22 39.85 13a Bessel ... 275 9 5 0.14 .501 33.25 9 4 27.39 305 57 5.45 1 13.13 . . 20 37 36.79 14 d Bessel . . . 275 9 5 1.26 .501 33.25 9 4 28.51 305 55 35.25 1 13.19 • • 20 39 7.05 15* 26 Washington .... 8 21 27.65 .609 33.26 8 20 55.00 302 29 26.00 1 22.40 4.9 t t 24 5 25.61 P. 16 Washington .... 8 32 13.96 .599 33.26 8 31 41.30 303 18 35.82 1 19.87 . . 23 16 13.26 17 Bessel ... 278 8 47 59.22 .643 33.26 8 47 26.60 304 19 32.98 1 16.83 . . , . 22 15 13.06 18 Washington .... 9 8 47.93 + .568 33.26 9 8 15.24 306 19 8.25 — 1 11.39 +20 15 32.35 19 t Argus 9 13 43.07 - .541 33.26 9 13 9.27 25 12 40.85 + 24.80 . . . . —58 39 36.44 20 9 20 52.38 + .346 33.26 9 20 19.47 334 35 14.28 — 25.02 —81 20.05 21 27 Washington .... 8 20 22.76 .673 33.38 8 19 50.05 302 15 1.05 J 23.66 13.1 +24 19 43,62 M. 22 Washington .... 8 30 44.80 .663 33.38 8 30 12.08 303 10 21.88 1 20.77 . . . . 23 24 19.90 23 c Washington .... 8 32 13.70 .661 33.38 8 31 40.98 303 18 33.12 1 20.35 . . 23 16 8.24 24 Bessel ... 278 8 46 31.21 .651 33.38 8 45 58.48 304 11 56.25 1 17.77 . . 22 22 42.53 25 Washington. . . . 9 8 47.67 .626 33.38 9 8 14.92 306 19 1.22 1 11.99 • • - ' 20 15 31.78 26 29 H. C 16393 8 15 18.11 .674 33.21 8 14 45.57 302 34 25.00 1 22.38 8.9 t t 24 0 22.59 M. 27 Washington .... 8 20 22.36 .679 33.21 8 19 49.83 302 15 6.70 1 23.42 . . , . 24 19 41.93 28 Washington .... 8 32 13.56 .720 33.21 8 31 41.07 303 18 33.62 1 20.16 23 16 11.75 39 Washington .... 9 8 47.67 .627 33.21 9 8 15.09 306 19 4.32 1 11.78 • • • • 20 15 32.67 30 30 Bessel ... 275 9 8 47.13 + .664 32.97 9 8 14.82 306 42 26.05 — 1 10.75 8.8 . . +19 52 10.01 P. 31 9 13 42.79 — .621 32.97 9 13 9.20 25 12 38.72 + 24.88 58 39 38.29 32 9 20 52.09 + .335 32.97 9 20 19.46 334 35 10.45 — 25.11 — 8 1 20.03 33 31 H. C 16464 8 17 8.57 -f- .w« .676 33.40 8 16 35.85 302 33 13.02 1 18.50 8.3 +24 1 31.29 M. 34 Bessel ... 275 9 8 47.44 .638 33.41 9 8 14.67 306 42 26.15 1 10.15 • • 19 52 9.81 35 April 2 Bessel ... 278 8 48 5.98 .934 33.84 8 47 33.07 304 25 59.75 1 18.23 7.7 . 22 8 44.89 M. 36 Bessel ... 275 9 7 59.09 .897 33.85 9 7 26.14 306 43 8.02 1 11.88 • • 19 51 30.27 37 6 Washington .... 8 20 21.29 .532 35.15 8 19 46.67 302 25 6.00 1 23.28 8.2 24 9 43.19 M. 38 Bessel . . . 278 8 48 7.30 .566 35.16 8 47 32.71 304 25 55.35 1 17.15 +22 8 47.71 39 9 20 54.07 .314 35.17 9 20 19.21 334 35 10.50 25.22 g \ 19.37 40 8 Washington .... 8 20 24.91 .522 35.68 8 19 49 75 302 15 5.90 1 23.37 + 8.0 +24 19 43.58 M. 41 9 20 54.66 +0.297 35.69 9 20 19 27 334 35 11 20 25 13 — 8 1 19 96 a Bessel 275, 4th wire, — 3.27 rev. = 1' 31",30. 6 Bessel 278, 4th wire, + 0.14 rev. = 1''.70. o As there are two stars in the field differing in A. R. almost accu- c Bessel 278, 6th wire, + 5.13 rev. = 10' 48".72. rately It., it is supposed that the A. R. of the preceding was ob- d Bessel 275, 4th wire, — 3.23 rev. = 1' 30" .20. served while the declination of the following one was measured. e Washington, 6th wire, —0.51 rev. =8' 11».24. I have transposed the circle readings to make the results conform * Mr. Phelps observed this star on only one wire. It is reduced on with the observations on pages 316 and 317. J. M. G. the supposition that it was B. INFERIOR CONJUNCTION OF VENUS, 1850-51. MERIDIAN CIRCLE OBSERVATIONS. .-_- d Apparent A. 11. observed. •O • C w Corrections for 6 S & S | Circle reading, Refrac- Nadir. 1 Observed. £ £ ri Date. ObjcJt. 111 1!! Inst. Clock. mean of four microscopes. tion. 1 apparent declination. bserver. 1 0 "° 0 0 1850. h. in. s. s. s. h. m. s. o / It it It « 1 Oct. 19 2 a Scorpii . . . 16 19 59.31 .160 14.698 16 20 13.85 352 39 25.68 — 6.69 8.89 26 5 35.99 G. 9 a Tri. Aust. . . 16 32 38.23 2.230 14.725 If, 32 50.73 35 17 46.18 + 36 74 68 44 39.92 10 17 12 38.05 1.162 14.810 17 12 51.70 11 Venus . . N.L. 17 28 27.67 .170 14.843 17 28 42.34 354 27 8.48 — 5.03 . . + 17,6 27 53 38.05 12 4 a Tri. Aust. . . 16 32 32.21 2.246 20.847 16 32 50.81 35 17 45.50 + 36.71 8.38 68 44 39.72 p. 13 77 Ophiuchi . . . 17 1 26.68 .045 20.906 17 1 47.54 342 5 57.28 — 16.86 . . , t 15 31 57.93 14 0 Ane . . . . 17 12 32.07 1.174 20.929 17 12 51.83 21 56 12.68 + 21.02 . . . 55 22 51.21 15 a Ane .... 17 19 56.44 .981 20.944 1" 20 16.42 16 c Venus . . S.L. 17 34 21.11 .272 20.973 17 34 41.81 354 31 10.75 — 5.01 — 18.2 27 51 5.05 17 5 a Scorpii . . . 16 19 50.21 .193 23.680 16 20 13.70 352 39 21.23 — 6.69 7.75 26 5 32.68 G. 18 a Tri. Aust. . . 16 32 28.73 —1.860 23.704 16 32 50.57 35 17 43.03 + 36.72 4 , 68 44 37.89 19 TJ Ophiuchi . . . 17 1 23.25 + .025 23.760 17 1 47.04 342 5 53.55 — 16.77 . , . . 15 31 54.92 30 Venus . . N.L. 17 37 9.84 - .195 23.828 17 37 33.47 354 31 23.40 4.97 • • + 18.5 27 57 55.07 31 7 a Scorpii . . . 16 19 44.96 .076 28.919 16 20 13.80 352 39 22.23 — 6.70 5.68 . 26 5 35.74 G. 23 a Tri. Aust. . . 16 32 23.33 —1.692 28.941 16 32 50.58 35 17 41.95 + 36.79 , . 68 44 38.95 23 TI Ophiuchi . . . 17 1 18.46 + .099 28.991 17 1 47.55 342 5 52.68 — 16.79 . , . . 15 31 56.10 24 Venus . . N.L. 17 42 31.89 — .110 +29.062 17 43 0.84 354 31 44.93 4.98 19.0 27 58 19.16 25 »8 a Scorpii , . . 16 20 44.10 .065 —30.047 16 20 13.99 352 39 22.53 — 6.72 6.05 26 5 35.65 G. 36 a Tri. Aust. . . 16 33 22.46 —1.669 30.052 16 32 50.74 35 17 40.88 + 36.92 . . . , 68 44 37.64 27 rj Ophiuchi . . . 17 2 17.71 + .109 30.065 17 1 47.75 342 5 57.28 — 16.85 t t t f 15 32 0.27 28 Venus . . N.L. 17 46 5.69 — .099 30.084 17 45 35.51 354 31 11.68 5.00 19.3 27 57 45.82 Wd 10 a Scorpii . . . 16 20 45.16 .120 31.452 16 20 13.59 352 39 24.65 — 6.78 7.73 26 5 36.03 G. 30 a Tri. Aust. . . 16 33 24.09 —1.564 31.456 16 32 51.07 35 17 40.15 + 37.25 . , . . 68 44 35.56 31 i) Ophiuchi . . . 17 2 18.94 + .036 31.466 17 1 47.51 342 5 55.18 — 17.01 j . . 15 31 56.33 32 Venus . . N.L. 17 50 56.94 — .150 31.482 17 50 25.31 354 28 36.78 5.09 _ 20.0 27 55 9.85 33 f! Sagittarii . . 18 5 20.29 — .076 31.487 18 4 48.73 347 39 22.70 11.52 . . . . 21 5 29.34 34 c 11 i? Ophiuchi . . . 17 2 19.29 + .063 31.945 17 1 47.40 342 5 54.95 - 16.87 7.48 15 31 56.49 G. 35 a Arm .... 17 20 48.86 — .643 31.936 17 20 16.28 16 18 26.08 + 15.28 . . , f —49 44 59.77 36 a Ophiuchi . . . 17 28 30.26 + .492 31.933 17 27 58.82 31354 1.88 — 54.22 . . . . +12 40 33.93 37 Venus . . N.L. 17 53 12.21 — .140 31.922 17 52 40.15 354 26 37.23 5.08 . . 20.3 —27 53 10.86 38/ 13 a Scorpii . . . 16 20 44.54 .066 30.687 16 20 13.79 352 39 25.73 — 6.75 10.05 26 5 34.82 G. 39 a Tri. Aust. . . 16 33 23.67 2.958 30.680 16 32 50.03 35 17 41.60 + 37.10 , . 68 44 34.54 40 a Arte .... 17 20 48.02 1.019 30.652 16 20 16.35 16 18 26.95 + 15.34 . . 49 44 58.13 41 Venus . . N.L. 17 57 18.57 .087 30.632 17 56 47.85 354 21 9.33 — 5.18 . . + 21.0 27 47 40.99 42 14 a Scorpii . . . 16 20 43.83 .114 29.736 16 20 13.98 352 39 26.20 — 6.53 —11.88 26 5 33.68 G. 43 a Tri. Anst. . . 16 33 22.41 -S. 148 29.726 16 32 50.54 35 17 45.58 + 35.88 , 68 44 35.47 44 rj Ophiuchi . . . 17 2 17.01 +0.105 —29.705 17 1 47.41 342 5 57.38 — 16.38 • • • • —15 31 55.01 a This is the best observation yet made of the planet. b Light cirri over all the heavens, c Recorded N.L., but the discordance with ephemeris induces me to believe the S.L. was really observed, and it is reduced accord- e a Scorpii and a Trianguli Australis not seen by reason of clouds. / The observations of o Scorpii and a Trianguli Australis are not reliable in decimation, both objects being rather like flaring mops than stars, and very unsteady. inSlv- J. M. G. * At 2/i. 20m. shortened clock pendulum and advanced hand one d a Scorpii was exceedingly unsteady, o Arm was seen but too minute. dimly to measure ; it certainly is not eo bright as /?. a Ophiuchi obscured by clouds, through which Venus also was seen. Wires O, F, G of p' Sagittarii occulted by horizontal wire. n Mai1- ti!;i/iiiLr iin.l un t> <;mi(l i.l).-. r\ iiii.in.;, r Si-cn thro'iyh li.t/.<-. d GiK>(l niL'iiMin1-. Mean N. P. . . Twelve trau-it- M>';m.S.F. . , Twelve traiicits . h. m. Correction for rlironometer at 5 10 . Correction tor chronometer at 5 18 . AT SANTIAGO DE CHILE. OECEMBKIl •*'}, 1N41I— <'oiltimiril. Remarks. e Object-^ !iii>t<'a. £ 1 Object. A. B. C. D. E. A a. A,!. Air. Wet. 6 s. s. s. s. s. h. in. s. Rev. 111. S. Rev. Incites. • • X 29 Bessel ... 405 52.0 5.1 18.3 31.5 44.3 4 38 18.24 +6.41 28.186 67.7 56.5 30 Mars . . . N.P. 2.0 15.0 28.5 41.2 4 41 15.05 6.66 +3 56.81 +0.45 Thfr. ail. 31 Bessel ... 405 59.6 12.6 25.9 39.2 52.0 4 44 25.86 6.59 65° .6 32 a Mars . . . S.F. 57.3 10.5 23.5 37.0 49.8 4 48 23.62 6.09 3 57.76 -0.50 to 32° F. 28.087 33 Bessel ... 405 38.5 51.8 4.8 18.3 31.0 4 50 4.88 6.76 34 Mars . . . N.P. 34.5 47.7 1.0 14.3 27.0 4 54 0.90 7.23 3 50.02 +0.47 35 Bcssel ... 405 25.5 39.0 52.5 6.0 18.5 4 55 52.30 7.01 366 Mars S.F. 49.5 2.5 15.5 4 59 49.29 6.52 3 56.99 —0.49 37 Bessel ... 405 8.5 21.8 35.0 48.0 1.0 5 a 34.86 7.16 38 Mars . . . N.P. 3.5 16.8 30.0 43.5 56.2 5 6 30.00 7.59 3 55 14 +0.43 39 Bessel ... 405 39.1 52.5 5.7 19.2 32.0 5 8 5.70 7.29 40 Mars . . . S.F. 34.8 48.5 1.7 15.0 28.0 5 12 1.60 6.81 3 55.90 —0.48 41 c Bessel - 405 21.0 34.5 47.3 0.8 13.5 5 13 47.42 7.51 42 Mars . . . N.P. 15.2 28.0 41.2 55.5 8.0 5 17 41.58 7.98 3 54.16 +0.47 43 Bessel ... 405 40.5 53.7 7.1 20.3 33.2 5 21 6.96 3.95 44 Mars . . . S.F. 35.5 48.7 2.0 15.5 28.2 525 1.98 3.42 3 55.02 —0.53 45 Bessel ... 405 38.0 51.2 4.5 18.0 30.7 5 27 4.48 4.08 46 Mars . . . N.P. 31.0 44.5 57.7 11.5 24.0 5 30 57.74 4.49 3 53.26 +0.41 47 Bcssd ... 405 12.0 25.0 38.3 51.8 4.5 5 33 38.32 4.17 48 Mars . . . S.F. 5.5 19.5 32.5 46.0 58.2 5 37 32.34 3.70 3 54.02 —0 47 49 d Bessel ... 405 11.5 24.5 37.8 51.2 4.0 5 40 37.80 4.31 50 Mars . . . N.P. 3.3 16.7 30.3 43.8 56.5 5 44 30 12 4.81 3 52.32 +0.50 51 Bessel ... 405 45.2 58.6 11.7 25.3 38.0 5 47 11.76 4.54 52 Mars . . . S.F. 38.5 52.0 5.0 18.5 31.0 5 51 5.00 3.98 3 53.24 —0.56 53 Bessel ... 405 15.3 28.6 41.7 55.3 8.0 5 S2 41.78 4.50 54 Mars . . . N.P. 7.1 20.2 33.5 46.8 59.3 5 56 33.38 5.04 3 51.60 +0.46 55 Bessel . . . 405 35.5 48.5 1.8 15.2 28.0 558 1.80 4.61 56 Mars . . . S.F. 27.8 41.0 54.3 7.8 20.4 6 1 54.26 4.18 3 52.46 -0.43 57 Bessel ... 405 30.5 44.0 57.2 10.5 23.3 6 4 57.10 4.59 58 Mars . . . N.P. 21.2 34.6 47. 8« 1.2 13.9 6 8 47.74 5.14 3 50.64 +0.55 .V.I Bessel ... 405 52.6 6.0 19.2 32.5 45.3 6 10 19.12 4.69 60 Mars . . . S.F. 44.2 57.5 10.8 24.0 36.8 6 14 10.66 +4.25 +3 51.54 —0.44 Remarks. As the imase of Mars was very tlariii;:, anil its iiiiitiuii I'xtremi ly irregular, it was impossible to measure "itli much certainty until 4/j. 45m. a Planet Mars siemh. I* Until excellent measures. r Recorded 8.0s. at wire 1). d Recorded 40.0s. at wire E. Mean N. P. . . Fifteen transits . Mean S. F. . . Fifteen transit- . h. in. Correction for cliionoineter ai 4 41 . Correction liir elirnnuaieler at 4 48 . A P. F. limbs in A. R. reduced to arc Variation ol A. K. in 6m. 18s h. in. s. . 4 41 27.55 . 4 47 45.46 s. . —13.36 . . —13.26 // . . 13.32 . . + 6.47 19 79 III. s. Itev. +3 56.909 .... —0.471 . . +3 57.797 .... +0.522 . . . . =0 9.18 . . =0 10.17 ll. ill. s. . . 4 41 14.29 F . 4 47 32.20 . . 6 17.91 A N. S. limbs micr. in rev. Variation of declination in 6m. 18s. . Corr. for diani. of micr, wires Observed N. id. diameter li. m. A a at 4 46 . 0.994=19.35 + 0.06 — 2.20 17.21 . 0.01 li. in. A e nt 4 39 it 0.01 AT SANTIAGO DE CHILE. 27 DECEMBER '21. 1849. No. for reference. Object. Chronometer lime of transit. Mean of \virrs Mier. Planet— Star. Bar. Thermometers. A. B. C. D. E. An. A & Air. Wet. B. •. s. s. s. ll. 111. B. Rev. III. s. Rev. Indies. • • 1 Hi ssd . . . 405 21.3 35.0 48.5 14.5 3 14 48.18 +3.75 28 193 71.1 57.8 •• Mars . . . N.P. 48.0 1.5 14.5 28.0 40.8 3 17 14.56 4.74 +2 26.38 +0.99 3 4 5 R.'sscl . . . 405 Mar. . . . S.P. Ili'ssi'l ... 405 13.5 40.0 27.0 27.8 53.5 40.2 41.0 6.7 53.2 54.5 20.2 6.8 7.0 33.5 19.5 3 19 40.76 3 22 6.78 3 29 53.34 4.01 3.91 4.40 2 26.02 —0.10 Ther. an. 70° .2 Bar. red. to 32° F. 28.080 6 Mars . . . N.P. 51.2 4.5 17.5 31.0 43.6 3 32 17.56 5.33 2 24.22 +0.93 7 llessi-l ... 405 36.5 49.8 3.0 16.3 29.0 3 34 2.92 4.61 8 Mars . . . S.F. 1.5 15.0 28.2 41.5 54.7 3 36 28.18 4.45 2 25.26 —0.16 9 llrssc] . . . 405 17.7 31.2 41.0 57.0 9.7 3 38 43.92 4.78 10 M.-ir.s . . . N.P. 41.0 54.3 7.5 21.0 33.7 3 41 7.50 5.75 2 23.58 +0.97 11 H.-ssel ... 405 39.0 IB.'! 5.3 18.7 31.5 3 43 5.34 5.02 12 Mars ... S.F. 16.8 29.8 43.3 56.0 3 45 29.85 4.92 224.51 —0.10 13 Bessel ... 405 26.5 39.8 52.8 6.0 18.7 3 47 52.78 5.19 11 Mars . . . N P. 49.3 2.5 15.6 29.0 41.8 3 50 15.61 6.08 2 22.88 +0.89 15 Hi'ssi-1 ... 405 55.1 8.2 21.3 34.5 47.5 3 52 21.32 5.85 16 Mars . . . S.F. 18.8 32.0 45.3 58.7 11.5 3 54 45.26 5.28 2 -33.94 —0.07 17 a H.'ssH . . . 405 17.3 30.5 43.7 57.0 10.5 3 57 43.30 5.63 18 Mars . . . N.P. 39.6 52.6 5.7 19.3 32.0 4 0 5.84 6.52 2 22.04 +0.89 19 l',r->l'l . . . 405 0.5 13.5 26.8 40.3 52.5 4 10 26.72 2.99 20 Mars . . . S.F. 23.0 36.2 49.2 2.7 15.0 4 12 49.22 2.89 2 22.50 —0.10 21 Hrssi-l ... 405 8B.8 52.5 5.5 18.5 31.5 4 15 5.56 3.76 22 Mars . . . N.P. 0.5 14.0 27.0 40.5 53.0 4 17 27.00 4.76 2 21.44 +1.00 23 Ili-ssi-l ... 405 27.0 40.5 53.7 6.8 19.5 4 19 53.50 4.90 •Jl Mars . . . S.F. • • 1.0 14.0 27.5 40.2 4 22 14.05 4.80 2 20.55 —0.10 25 •MM! . . . 405 46.9 0.2 13.3 28.5 39.3 4 24 13.21 4.13 26 Mars . . . N.P. 7.2 20.4 33.5 46.8 59.5 4 26 33.48 5.09 2 20.24 +0.96 27 lii-ssi>l ... 405 3.0 16.2 29.2 42.5 55.5 4 28 29.28 4.28 28 Mars . . . S.F. 24.0 37.2 50.5 4.0 16.5 4 30 50.44 4.22 2 31.16 —0.06 29 •MMI . . 405 52.2 5.5 18.5 32.0 44.8 4 32 18.60 4.43 30 Ma:s . . . N.P. 25.2 38.2 51.8 4.5 4 34 38.30 5.38 2 19.70 +0.95 31 Ili'.-.-rl ... 405 2.5 15.8 29.0 42 5 55.3 4 35 99.02 4.62 93 Mars . . S.F. 23.4 36.5 49.6 3.0 15.7 4 38 49,ti4 4.52 2 20.62 —0.10 j;i at lli:.-si-l ... 405 Mars . . N.P. 5.5 18.7 37.5 43.8 31.7 50.8 57.0 45.0 4.2 10.5 57.8 17.0 23.2 4 40 31.74 4 42 50.75 4 44 57.06 4.71 5.60 4.89 2 19.01 +0.89 llessrl ... 405 30.8 :*\ Mars . . . S.F. 50.5 4.0 17.0 30.5 43.2 4 47 17.04 4.80 2 IS). 98 i —0.09 :i? Hcssel . . . 405 12.0 25.2 38.2 51.5 4.3 4 52 33.24 5.15 38 Mars . . N.P. 30.2 43.2 56. 5 9.8 22. i 4 54 56.44 6.06 2 18.20 +0.91 :t'j . . 405 29.0 42.5 55.0 9.0 22.0 4 56 55.70 5.36 HI Mars . . . S.F. 48.3 1.5 14.7 28.3 41.0 4 59 14.76 5.28 2 19.06 —0.08 41 l:.--'l ... 405 17.5 30.6 43.6 10.0 5 2 43.78 5.55 4-2 Mars . . . N.P. 34.5 48.2 1.4 14.5 27.3 5 5 1.1B 8.49 2 17.40 +0.90 43 M;.S 10.9 86.5 49.5 5 7 - • t . .~»7 44 Mars . . . S.F. 15.3 28.5 41.5 55.0 8.0 5 a 41.06 5.51 2.18.3S —0.06 45 lir-s,-| . . . 28.5 41.7 55.7 8.0 5 11 ll.ss 5. SO 46 Mars . . . N.P. 3J.:. •i:,. :, 58.7 i-;.-; K ii 5 1:1 - +6.66 +2 16.90 +0.86 1 28 OPPOSITION OF MAKS, 1849-50, DECEMBER 34, 184r9-Coiitiiiued. £ u a Chronometer time of transit. Micr. Planet— Star. TliiTinomfterp. Bar. 1 £ Object. A. B. C. D. E. A a. A<5. Air. Wet. ^ 6 s. s. s. s. s. h. ID. s. Rev. m. s. Rev. Inches. , . 2 47 Bessel ... 405 17.5 30.5 43.6 57.2 10.0 5 18 43.76 +6.04 28.193 71.1 57.8 48 Mars . . . S.F. 35.2 48.5 1.5 15.0 27.8 521 1.60 5.99 +2 17.84 —0.05 Ther. att 49 Bessel . . . 405 48.8 3.0 15.3 28.5 41.2 5 23 15.16 6.14 70°. 2 50 Mars . . . N.P. 5.0 18.0 31.2 44.5 57.2 5 25 31.18 7.13 2.16.02 +0.99 Bar, red. to 32' F. 28.080 51 Bessel ... 405 6.8 20.1 33.2 46.8 59.2 5 27 33.92 6.26 52 Mars . . . S.F. 37.2 50.5 3.5 16.4 5 29 50.28 6.19 2 17.06 —0.07 53 Bessel ... 405 51.8 5.0 18.2 31.7 44.5 5 32 18.24 6.27 54 Mars . . . N.P. 7.2 20.5 33.5 47.0 59.7 5 34 33.58 7.20 2 15.34 +0.93 55 Bessel ... 405 36.3 49.2 2.5 16.0 28.7 5 41 2.54 6.47 56 Mars . . . S.F. 52.1 5.2 18.5 32.0 44.8 5 43 18.52 6.38 2 15.98 —0.09 57 Bessel . . . 405 37.0 50.1 3.3 16.5 29.3 5 45 3.24 6.52 58 Mars . . . N.P. 51.0 4.5 17.7 31.1 43.7 5 47 17.60 7.43 2 14.36 +0.91 59 Bessel ... 405 2.3 15.5 29.0 42.3 55.0 5 49 28.82 6.68 60 Mars . . . S.F. 18.0 31.1 44.5 57.7 10.5 5 51 44.36 6.59 2 15.54 —0.09 61 Bessel ... 405 13.3 26.5 39.7 53.2 6.0 5 53 39.74 6.82 62 Mars . . . N.P. 27.3 40.5 53.7 7.0 20.0 5 55 53.75 7.79 2 14.01 +0.97 63 BCBSC! ... 405 52.0 5 2 18.2 31.6 44.6 5 58 18.32 6.99 64 Mars . . . S.F. 6.8 20.0 33.4 46.8 59.5 6 0 33.30 6.95 2 14.98 —0.04 65 Bessel ... 405 41.2 54.5 7.5 20.6 33.8 6 3 7.52 6.99 66 Mars . . . N.P. 54.5 7.5 20.6 34.2 47.0 6 5 20.76 7.98 2 13.24 +0.99 67 Bessel ... 405 10.0 23.2 36.3 49.8 2.5 6 8 36.36 7.87 68 Mars . . S.F. 24.3 37.5 50.5 4.2 16.9 6 10 50.68 7.77 2 14.32 —0.10 69 Bessel . . . 405 20.5 .34.0 47.5 0.6 13.5 6 12 47.22 7.93 706 Mars . . . N.P. 33.5 46.8 59.5 13.0 25.8 6 14 59.72 8.87 2 12.50 +0.94 71 Bessel ... 405 10.0 23.0 36.5 50.0 2.8 6 17 36.46 0.97 72 Mars . . . S.F. 23.5 37.0 50.2 3.5 16.5 6 19 50.14 0.82 2 13.68 —0.15 73 Bessel ... 405 42.3 55.6 9.0 22.0 35.0 6 24 8.78 0.93 74 Mars . . . N.P. 52.4 7.8 20.8 31.2 47.0 6 26 20.84 1.92 2 12.06 +0.99 75 Bessel ... 405 19.1 32.5 45.0 58.5 11.5 6 28 45.32 0.98 76 Mars . . . S.F. 31.7 45.0 58.1 11.5 24.3 6 30 58.12 0.93 2 12.80 —0.05 77 Bessel ... 405 41.5 54.5 8.0 21.0 34.0 6 33 7.80 0.98 78 Mara . . . N.P. 52.5 5.8 18.8 32.3 45.0 6 35 18.88 1.97 2 11.08 +0.99 79 Bessel ... 405 24.5 37.5 50.5 4.0 17.0 6 37 E0.70 0.78 80 Mars . . . S.F. 36.5 49.8 3.0 16.0 29.0 6 40 2.86 +0.71 i +2 12.16 —0.07 Remark*. t The observations of to-night are very generally jj"""l, both objects being well defined and moderately >-tc»(ly throughout the whole period. There ha* hern considerable change in the physical a|i|ieainnce of the plnnet since the 17th, the dark-red and greenish white portions being of il less decided distinctness. Ho clear and unvaiyim; is the atmosphere, liiat there appears no limit to the niagi.ifyiMg power which may be applied. a Recorded 14.5s. at wire E. li Micrometer recorded + 7.87 rev. Mean N. P. Mean S. F. T\\r],H Irairil: . Tvvenlv transit.- . 11. m. s. 4 5<,,,,, inn. ,1 . Objci-t. riironnlnrtrr tim,. of transit. Moan of wires. Micr. Planet — Star. Bar. Thermometers. A. B. C. D. E. A a. A I. Air. Wet. 8. - s. s. s. li. in. 8. Rev. 8. Rev. Inches. « - 1 . . .405 Mars . . . S.F. 37.5 51.0 30.0 4.3 43.5 17.8 56.8 9.5 6 0 4.20 6 0 43.33 +3.69 3.67 +39.13 —0.02 28.023 73.2 57.8 82 83 Besscl ... 405 Mars . . . N.P. IVss.l ... 405 8.5 38.8 21.5 59.2 52.0 34.8 12.2 5.1 48.2 25.2. 18.5 38.5 6 2 34.80 6 3 12.15 6 4 5 15 3.60 4.59 3.75 37.35 +0.99 Ther. att. 72°. 2 Bar. rrd. to 32" F. 27.904 84 Mars . . . ^.F. 30.8 44.0 57.0 10.0 6 4 43.83 3.75 38.68 ±0.00 as Ili-si-l ... 405 59.8 13.2 26.8 40.5 6 6 26.63 3.95 86 Mars . . . N.P. 4.5 17.8 30.5 6 7 4.39 4.95 37.76 +1.00 *7 ll.-ssi-l . . . 405 55.5 8.5 21.6 6 921.74 3.79 88 Miirs . . . 8.F. 46.5 59.5 13.3 26.0 6 9 59.70 3.79 37.96 ±0.00 89 IIfSM-1 ... 405 6.2 19.5 32.0 46.0 6 12 32.49 3.59 90 Mars . . . N.P. • • 56.2 9.3 22.5 35.5 6 13 9.25 +4.60 +36.76 +1.01 Remarks. A tolerably good night for observations, occasionally varied by sudden changes in the atmospheric condition, which made both objects appear ve by jumps. The measures, however, are pretty fair. a Recorded 36.5s. at wire J). /' Keeurileil ;VJ.3s. at \virc H. c Micrometer recorded -f-3.47 res*. d Recorded N. P. — omitted in results. e Recorded 56.0s. at wire C. Mi'nn N.P. . . Twenty transits Mrjiii^.F. . . Twenty-four transits . li. in. h. m. B. 5 0 34.88 5 2 58.39 14 63 Results. s. Rev. +41.927 .... +0.967 . +42.9-23 .... —0.016 . / // , . . =0 18.91 , . . =0 0.31 h. m. s. . .5 0 20 25 . r 3 14 63 ...52 43.76 2 23 51 A P. F. linilis in A. R. reduced to arc . . Variation of A. R. in 2m. 23s. 14.94 . + 2.35 A N. S. limbs micr. in rev. . . . 0.986 = 19.23 . . + 0.00 <>!i>. nnl P. F. diametc-r li. m. A o a', 5 0 17.29 ti . 0.02 Corr. lor diameter of micr. wires . Observed N. S. diameter h. m. A o at 5 2 . . . — 2.20 . . 17.02 // . 0.00 DECEMBER 36, 1849. No. for reference. Ohjcct. < 'iiMHMininer time of transit. Mean of \virrs. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ai. Air. Wet. s. 9. S. s. 8. h. m. s. Rev. s. Rev. Inches. • • 1 Mars . . . N.P. 37.8 51.2 17.8 3 38 4.34 +3.78 28.034 71.2 58.4 9 1 . . .405 37.5 50.5 4.0 16.8 3 88 50.58 3.18 —46.24 +0.60 3 4 E Mars . . . S.F. l!<— ,-l ... 405 Man- . . . N.P. 21.1 57.8 34.5 20.5 11.2 47.5 32.5 2-1.3 1.0 46.0 59.0 3 40 47.58 3 41 32.88 3 42 24.31 2.96 3.38 4.16 45.30 —0.4-3 ThiT att.. H.ir. n-il. 6 Hi-SM-l . . . 'III.-, H.I 57.5 11.0 24.0 36.8 3 43 10.76 :i..-,:i —46.45 +0.63 32 OPPOSITION OF MARS, 1849-50, DECEMBER 36, 1849— Continued. c Chronometer time of tiansit. Micr. Planet— Star. Bar. riu-rnioineters. 1 Object. A. B. C. D. E. A a. AJ. Air. Wet. £ c B. s. s. s. s. h. in. s. Rev. s. Rev. Inches. • • 7 Mars . . . S.F. 38.0 51.2 4.5 17.7 3 45 4.40 +3.25 28 034 71.2 58.4 8 Bessel ... 405 37.0 50.0 3.3 . . 3 45 50.01 3.70 —45.61 —0.45 Ther. att 9 Mars . . . N.P. 2.5 15.8 M.i 42.0 3 49 28.83 j 4.48 67°. 5 10 Bessel ... 405 2.5 15.8 29.2 42.0 3 50 15.75 . 3.81 46.92 +0.67 Bar. red. to 32° F. 27.929 11 Mars . . . S.F. 44.8 58.2 11.5 25.0 3 51 11.43 3.46 12 Bessel ... 405 31.0 44.0 57.2 10.6 23.5 3 51 57.36 3.83 45.83 —0.37 13 Mars . . . N.P. 13.7 27.2 40.3 53.8 3 54 40.28 4.69 14 a Bessel ... 405 1.5 14.0 27.8 41.0 53.5 3 55 27.56 3.97 47.38 +0.72 15 Mars . . . S.F. 59.0 12.3 25.3 39.0 3 58 25.43 3.95 16 Bessel . . 405 45.5 58.5 11.8 35.0 37.8 3 59 11.72 4.33 46.29 —0.38 17 Mars . . . N.P. 45.3 58.5 11.8 25.3 4 2 11.73 5.16 18 Bessel ... 405 33.3 46.5 59.8 13.2 25.8 4 2 59.70 4.48 47.97 +0.68 19 Mars . . . S.F. 24.8 38.0 51.0 4.5 4 551.13 4.21 20 Bessel ... 405 24.5 38.0 51.5 4.3 4 6 37.95 4.52 46.82 —0.31 21 Mars . . . N.P. 52.3 5.5 18.5 32.0 4 9 18.63 5.37 gg Bessel ... 405 40.5 53.7 6.8 20.3 33.0 4 8 6.86 4.80 48.33 +0.57 33 Mara . . . S.F. 19.2 32.5 45.7 59.0 4 11 45.65 4.56 24 Bessel ... 405 6.5 19.8 33.0 46.0 59.0 4 12 32.86 4.99 47.31 —0.43 351 Mars . . . N.P. 42.8 56.2 9.5 22.5 4 13 9.30 5.66 26 Bessel . . . 405 31.8 45.0 58.0 11.5 24.2 4 13 58.10 5.01 48.80 +0.65 27 c Mars . . . S.F. 30.5 33.7 46.8 0.0 4 16 46.80 4.70 28 Bessel ... 405 7.8 21.2 34.3 47.5 0,2 4 17 34.20 5.14 47.40 —0.44 39 d Mars . . . N.P. 1.0 14.0 27.2 40.5 . 4 19 27.23 5.84 30 e Bessel . . . 405 50.0 16.5 39.6 42.3 4 20 16.31 5.15 49.08 +0.69 31/ Mare . . . S.F. 58.3 11.5 24.8 38.3 , , 4 31 24.78 4.91 32 Bessel ... 405 46.5 59.8 13.0 36.3 39.0 4 22 12.90 5.29 48.13 —0.38 33 Mars . . N.P. 36.1 39.3 52.5 6.0 4 24 52.53 5.99 34 Bessel . . . 405 15.5 39.0 43.0 55.3 8.0 4 35 41.96 5.32 49.43 +0.67 35g Mars . . . S.F. 17.3 30.5 43.8 57.0 4 27 43.68 5.01 36 Bessel . . . 405 5.7 19.0 32.3 45.5 58.3 4 38 32.16 5.43 48.48 —0.42 37 e Mars . . . N.P. 17.5 30.8 44.0 57.3 4 30 43.93 6.13 38 Bessel . . . 405 7.3 30.5 33.5 47.0 59.7 4 31 33.60 5.53 49.67 +0.60 39 Mars . . . S F. 3.0 15.2 28.3 41.5 4 33 28.30 5.31 40 Bessel ... 405 50.8 3.9 17.1 30.3 43.2 4 34 17.04 5.74 48.74 —0.43 41 Mars . . . N.P. 43.8 57.5 10.2 33.5 4 35 10.30 6.46 42 Bessel . . . 405 34.0 47.2 0.3 14.0 26.7 4 36 0.44 5.80 50.14 +0.66 43 Mars . . . S.F. 33.0 35.2 48.5 1.7 4 38 48.40 5.53 44 Bessel . . .405 11.0 24.2 37.2 50.8 3.5 4 39 37.34 5.89 48.94 —0.36 45 Mars . . . N P. 26.0 39.3 52.7 6.0 4 41 52.55 6.64 46 Bessel ... 405 16.6 29 9 43.2 56.5 9.2 4 42 43.08 6.03 50.53 +0.62 47 Mars . . . S.F. 41.5 54.5 7.5 4 48 7.71 5.84 •is Bessel . . . 405 31.0 44.3 57.2 10.6 23.5 4 48 57.32 6.17 49.61 —0.33 49 Mars . . . N P. 42.4 55.5 8.8 22.0 . 4 50 8.73 6.94 50 Bessel ... 405 33.5 46.8 0.0 13.3 36.0 4 50 J9.92 6.24 51.19 +0.70 51 Mars . . . S.F. 16.2 29.5 42.5 56.0 t f 4 53 42.60 5.99 52 Bessel ... 405 6.5 19.5 33.0 46.2 59.0 4 54 32.84 +6.34 —50.24 —0.35 AT SANTIAGO DE CHILE. 33 DECEMBER •!<:. 1 - ri < ,,nli mi. 1.5 14.8 28.3 4 55 14.83 +7.04 28.038 71.2 58.2 54 Bessel ... 405 40.0 53.5 6.5 20.0 32.5 4 56 S.50 6.41 -51.67 +0.63 35 56 57 Mars . . . S.F. 34.2 . . . 405 L'1.5 Mar< . . . N.P. 4-2.5 47.."> 0.6 37.5 51.0 58.8 9.2 14.0 4.3 22.5 17.0 4 58 0.60 4 58 50.86 5 5 9.05 6.19 6.50 7.38 50.26 —0.31 Ther. alt. 67°.5 Bar. red. to 32° F. 27.929 58 Hi'-H . . . 4(lr. 31.8 48.0 1.2 14.8 a.S 5 fi 1.23 6.74 , 52.21 +0.64 ' Mars . . S.I'. 0.0 13.2 26.2 39.7 58 26.33 ; 6.45 60 P..-S-I-! ... 405 51.0 4.2 17.5 30.7 43.5 5 9 17.38 6.85 51.05 —0.40 61 Mars . . . N.P. 29.5 43.0 56.3 . . 5 10 56.14 7.56 62 ">-'-s Mars . . . N.P . . .405 0.2 54.2 13.3 7.5 36.5 20.5 40.0 34.3 47.0 5 34 26.55 5 35 20.70 3.94 3.41 54.15 +0.53 79 Mil's . . . S.F. Bl.O 17. -2 0.5 5 38 47.30 3.09 j CO ... 41).-. 14.0 -27.11 40.2 53.8 6.5 5 37 40.30 3.49 53.00 —0.40 82 Mars . . . N.P Bessel . . . 405 45.0 39.5 98.8 11.3 6.0 24.8 19.5 a.o 5 38 11.38 5 39 5.96 4.13 3.47 54.58 +0.66 Mirs . , . S F. 25.2 38.0 51.5 5.0 5 41 51.48 3.17 84 i ... 403 18.5 31.6 45.0 5«.5 11.2 5 42 44.96 3.50 53.48 —0.33 85 d Mars . . . N.P. 21.2 34.5 47.6 1.0 5 44 47.63 4.22 lli-ssi.| . . . 405 16.0 29.2 42. £ 55.8 8.5 5 45 42.40 3.61 54.77 +0.61 Mars . . . U.K. 57.4 10.5 23.8 37.3 5 46 2.7.80 3.27 88 lli-ssi'l . . . 405 :,i.o 4.3 17.5 31.0 43.7 5 47 17.50 3.64 53.70 —0.37 Mare . . . N.P. -21.11 34.5 47.5 0.5 5 49 47.30 4.38 90 >'.' Ml . . . 4d', I.-..5 28.8 42.5 56.0 5 50 42.32 3.68 55.02 +0.70 01 Mars . . . S F. 1.3 17.8 30.8 44.2 5 54 :<0.83 3.33 ; . . . 405 58.5 11.7 25.0 38.3 51.0 5 55 -' 3.71 54.07 —0.38 Mars . . . N.P. 32. fi 46.0 59.0 12.5 5 56 59.08 4.43 M ... 40.-, 28.2 41.5 54.7 8.1 21.0 5 57 54.70 3.73 55.62 +0.70 Mars . . . s.F. 48.8 2.0 15.0 5 50 : 3.40 1 ... 405 17.2 30.5 43.5 57.0 9.5 6 0 43.54 54.78 -0.42 97 Mars . . . N.P. 48.0 1.5 14.5 27.8 40.8 6 1 4.50 . . . 405 :,7.ll 10. :i 36.5 6 2 lci.:ii! +3.77 —55.84 +0.73 5° 34 OPPOSITION OF MARS, 1849-50, DECEMBER 3O. 1849— Continued. No. for relcrenef . Object. Chronometer time of transit. .Menu of wires Mii-r. Plunei — Star. Bar. Thermonii'lns. A. B C. D. E. s. A a. A S. Air. W.I. s. s. s. s. il. II). S. Rev. s. Rev. Inches. . 99 Mars . . . S F. 26.5 40.0 M.i li. 1 19.5 6 4 5«.12 +3.;,i •>,-. (as 71.2 58.2 100 Hesse! ... 405 22.0 35.5 •1^.1 1.5 14.3 6 ,'i 3.94 -.M.lli —0.43 . 101 102 103 Mars . . . N P. lle-el ... 405 Mars . . . S.F. 6.5 25.8 20.0 16.2 39.0 33.0 29.2 52.2 48.5 42.3 5.5 59.0 55.5 18.5 6 7 33.00 6 8 29.18 . 6 13 52.20 4.54 3 97 3.62 56.18 +0.57 Then alt. 67'. 5 R;ir. red. to 32" F. 27.9S9 104 Bessel ... 405 34.5 47.5 1.0 14.0 6 14 47.63 4.02 55.43 —0.40 105 Mara . . . N.P. 6.0 19.5 32.5 46.0 58.5 6 16 32.50 4.67 106 Bcssel ... 405 16.5 29.5 43.0 55.7 6 17 29.55 4.11 57.05 +0.56 107 Mars . . . S.F. 58.0 11.5 24.5 38.0 51.0 S 18 24.60 3.6,-> 108 Bessel ... 405 54.0 7.5 20.5 34.0 46.5 6 19 20.50 4.07 55.90 —0.42 109 Mars . . . N.P. 50.5 3.7 16.8 30.2 43.0 6 21 16.84 4.67 • 110 Bcssel ... 405 1.2 14.2 27.7 40.5 6 22 14.28 4.09 57.44 +0.58 111 113 Mars . . S.F. Bessel ... 405 25.0 21.2 38.2 34.2 51.2 47.6 5.0 1.2 17.5 13.8 6 24 51.38 6 25 47.60 3.59 4.02 56.22 —0.43 113 Mars . . . N.P. 19.8 33.2 46.2 59.5 13.5 6 27 46.44 4.65 114 Bessel ... 405 17.8 31.0 44.0 57.3 10.2 6 28 44.06 4.06 57.62 +0.59 115 Mars . . . S.F. 6.5 19.5 3S.8 46.5 59.0 6 30 32.86 3.65 116 Bessel . . . 405 3.0 29.5 43.0 55.5 6 31 29.46 4.04 56.60 —0.39 117 Mars . . . N.P. 53.0 6.3 19.5 33.1 45.8 6 32 19.54 4.70 118 Bessel ... 405 • • 4.5 17.5 31.2 44.0 6 33 17.68 4.18 58.14 +0.54 119 Mars . . . S.F. 31.2 44.5 57.8 11.0 24.2 6 35 57.74 3.78 120 Bessel ... 405 28.2 41.5 54.5 8.2 21.0 6 36 54.68 +4.19 —56.94 —0.41 Remarks At the commencement of observations (being seen through the cold stratum of air near the Cordilleras) Mars and the comparing star wer<- flaring and unsteady. At Ah. the images were better defined, and capable of being measured more accurately a Recorded 22. 8s. at wire C. /Recorded 58. 3>. at wire D. 6 Both objects unsteady. gMars unsteady, c Micrometer recorded + 3.70 rev. A Good. JGood measures. t Recorded 5.0«. at wire C. eGood observations. Mean N. P. . M. an S. F. . Correction for Correction for A P. F. limlis i Variation of A Observed P. F. . Thirty transits . Thirty transits h. m. chronometer at 5 5 . chronometer at 5 8 . rt A. R. reduced to arc . R. in 3m. 13s h. m. >. . 5 5 17.32 ..58 30.62 s. . . —15.37 . . —15.37 . . 15.76 + 3 06 Results. Kcv. — 52.163 .... +0.635 . . — 51.112 .... —0.39(1 . . . . — 0 12.38 . . =0 7.60 h, m. s. . 5 5 1 95 5 8 15 25 3 13.30 A N, S. limbs micr. in rev. Variation of declination in 3m. 13s. . Corr. for diam. of micr. wires . . . ' >!>MT\ <•«! \. H. liiiimeter .... h. in. A a at :< 9 . 1.025=19.98 — 0.02 — 2.20 17.711 . 0.00 h. m. A fi at :> 5 . . . . 0.01 AT SANTIAGO DE CHILE. 35 DECEMBER 27. 1819. • o c V riiioniinK ti'r linn- of transit. Mean ol \virv- Mi/>r Planet— Star. Thermometers. E .;. "i Object. A. R. C. D. E. icr. A a. AiJ. Bill". Air. Wet. C 6 s. s. 0. 8. 6. ll. 111. S. Rev. Ml. 8. Rev. Inches. 0 I Mars . . . N.I'. 15.5 28.2 41.7 55.3 8.0 3 54 41.74 +4.f3 28.148 70.1 59.1 •-' II.-SM-I ... 405 34.5 47.7 0.7 14.0 26.8 3 57 0.74 4.53 —2 19.00 io.oo Thor. nil. 3 j Mara . . . P.P. SH.6 35.6 49.0 2.5 15.0 4 2 49.40 2.49 68'. 5 4 . . .405 41.0 .-il.O 7.3 20.7 33.5 4 5 7.30 3.63 2 17.90 _. ., liar. red. to 32° K. 28.040 5 M:irs . . . N.P. 34.8 38.0 51.5 4.7 17.5 4 6 51.30 3.82 ti H.-ssc-l ... 405 44.3 58.0 11.2 24.6 37.3 4 9 11.06 3.89 2 19.76 0.07 7 Mars 8.F. 54.3 7.r. 20 5 34.3 47.0 4 12 20.70 3.33 8 !!.->. •] . . 405 13.0 26.2 39.2 M.7 5.2 4 14 39.26 4^.20 2 18.56 —0.87 9 Mars . . . N.P. 44.3 57.8 10.8 31.0 36.8 4 16 10.74 5.33 III II.-SM-I ... 405 4.0 18.0 31.1 •14.5 57.3 4 18 30.98 5. 33 2 20.34 'l.DII 11 Mars . . . S.P. 55.2 8.5 21.8 35.1 47.8 42021.68 1.01 li Ik-ssel ... 405 14.3 27.8 41.0 54.5 7.0 4 22 40.93 2.10 2 19.24 —1.09 13 Mars . . . N.P. 51.4 4.5 17.5 30.8 43.5 4 24 17.54 2.43 14 Bi-ssi-l . . . 405 12.2 25.3 38.3 51.4 4.6 4 26 38.36 2.43 2 30.83 ±0.00 15 Mais . . . S.F. 9.0 22.5 35.3 •;- E 1.5 4 23 35.36 1.56 18 l!.--s,-l . . 403 29.0 42.0 55.3 8.8 21.5 4 30 55.32 2.60 2 19.96 -1.04 17 | Mars . . . N.P. 17.7 31.0 44.3 57.8 10.5 4 32 41.26 2.51 IH li.-.ssi'l ... 405 39.0 52.5 5.8 111.11 33.0 4 35 5.66 2.57 2 31.40 0.08 19 Mars . . S.I-'. 43.2 56.5 9.7 23.0 35.8 4 37 9.64 1.56 lli'ss.i-1 ... 405 4.0 17.0 30.2 43.6 56.5 4 39 30.26 2.55 2 20.62 0.99 21 .Mars . . . N.P. 48.8 2.2 15.4 28.5 41.2 4 41 15.22 2.48 is ... 405 10.5 24.0 37.2 50.5 3.7 4 43 37.18 2.57 2 21.96 0.09 •Kl Mars . . . P.F. 48.0 1.2 14.3 27.7 40.5 4 46 14.34 1.58 34 c Ill's.-,.-! ... 405 9.0 23.3 35.5 48.8 51.5 4 48 35.42 3.67 2 21.08 —1.09 Mars . . . N.P. 31.3 !!.:: 57.5 11.0 23.7 4 50 57.56 2.82 26 lli'.si-l . . . 405 53.7 7.0 20.2 33.5 46.2 4 53 30.08 2.82 2 22.52 ±0.00 87 Miirs . . . S.F. 44.8 58.0 10.5 24.5 37.3 4 55 11.02 1.85 Hi— -I'l . . . -lO.-i i;.d 19. C 33.0 46 2 59.0 4 57 32.80 2.89 221.78 —1.04 29 Alar; . . . S.F. 18.5 31.7 44.7 58.2 11.0 5 3 44.82 1.98 80 ll.-s.'l ... 405 40.5 54.3 7.2 20.5 33.0 5 6 7.10 3.06 y 23.28 1.08 81 Mars . . . N.P. 15.5 29.0 42.1 55. fl -'.-: 5 9 42.06 3.17 39 H.'ssi-l ... 405 39.5 ', 52.7 6.0 19.3 32.0 5 18 5.88 3.26 2 23.82 0.09 Mars . . . S.F. i:',:> 26.8 40.0 53.2 6.0 5 13 39.90 2.27 34 . . .405 36.0 50.0 3.0 16.5 39.0 5 16 2.94 3.36 2 23.04 1.09 35 Mars . . . N.I'. I.I! 14.3 27.5 40.7 53.5 5 18 27.40 3.40 8B li.-s.'l ... 405 25.0 38.8 51.2 :,.:, 18.0 5 20 51.70 3.48 9 24.30 0.08 37 Mars . . . P.F. 17.0 30.2 43.3 56.5 9.3 5 23 43.24 2.49 38 Hi- •'•! . . . 405 53.5 (1 7 20.0 33.0 5 25 6.68 3.54 2 23.44 1.05 39 . . . \.l'. 6.0 19.3 33.5 45.8 58.5 5 27 32.42 8.53 •10 l!.-si.| ... 405 31.0 44.3 57.5 11.0 23.8 529 57.50 3.64 2 25.08 0.11 41 Miirs . . . S F. 19.3 32.5 45.5 59.0 11.8 5 31 45.62 2.63 43 li.- • 1 . . . 405 43.1 56.7 9.8 33.2 36.0 5 34 9.84 3.75 2 24.22 1.12 13 c Mars . . . N.P. 43.3 5(1.8 9.9 13.0 36.0 5 36 9.80 :).r,9 II I;.- el . . . I".". 8.0 23.2 86.9 48.8 1... :, 3*35.1-1 3.84 •i B.M 0.15 Mars . . . S.I-'. 6.0 in. a ;i-» g :. Ill 19.08 2.84 1 in u.-ssci , . . -in.-, I7.S :,',.•> in." .1 l'.i 13.71 f-8.83 -•_' -Ji.r»i — 1.11:1 36 OPPOSITION OF MARS, 1849-50, DECEMBER 87, 1849— Contiliuecl. No. for reference. Object. Chronometer limr of tnuiMt. Mean of wires. Micr. Planc't— Star. Bar. Thermometer* A. B. C. D. E. An. A S. Air. Wet. s. s. s. s. s. h. in s. Rev. II). S. Rev. Inches. ° 47 48 Mars . . . NP. Bcssel ... 405 15.8 42.5 29.0 55.0 42.4 9.0 55.8 22.2 8.2 35.2 5 44 42.24 5 47 8.78 +4.06 4.00 . —2 26.54 +0.06 28.148 70.1 59.1 49 50 51 52 Mars . . . S.F. ... 405 •Miss . . . N.P. Btssel ... 405 21.3 46.8 50.5 17.5 35.0 59.8 3.5 30.7 47.5 13.1 17.0 43.8 1.2 26.4 30.5 57.0 14.0 39.2 43.2 10.2 5 48 47. 80 5 51 13.06 5 53 16.94 5 55 43. 1 1 3.03 4.11 4.17 4.20 2 25.26 2 26.90 —1.08 0.03 Thcr. an. 68°. 5 Bar red. to :i-2° F. 88.040 53 Mars . . . S.F. 54.3 7.5 20.7 34.2 47.0 5 57 20.74 3.21 54 Bessel ... 405 19.5 33.2 46.5 0.0 12.7 5 59 46.38 4.32 2 25.64 1.11 55 M:irs . . . N.P. 54.7 8.0 90.5 34.5 47.2 6 1 20.98 4.33 56 llc.-M-l ... 405 22.3 35.5 48.8 2.2 15.0 6 3 48.76 4.42 2 27.78 0.09 57 Mars . . . P.P. 46.0 59.2 12.3 25.8 38.2 6 6 12.30 3.37 58 Bessel ... 405 12.3 i 25.7 39.0 52.4 5.3 6 8 38.98 4.37 2 26.68 1.00 59 Miirs . . . N.P. 47.0 0.5 13.5 27.0 39.6 6 10 13.52 4.45 60 Bessel ... 405 14.5 28.5 41.3 55.0 7.8 6 12 41.42 4.65 2 27.90 0.10 61 Mars . . . S.F. 3.9 17.5 30.5 44.0 56.8 6 15 30.54 3.40 62 BeMiel . . . 405 31.0 44.0 57.0 10.5 23.3 6 17 57.16 4.47 2 26.62 1.07 63 Mars . . . N.P. 40.5 53.8 6.8 20.2 33.0 6 20 6.86 4.43 64 Bessel ... 405 9.0 22.3 35.3 48.8 1 5 6 22 35.38 4.56 228.52 0.13 65 Mars . . . S.F. 15.5 29.0 42.0 55.2 8.0 62441.94 3.50 66 Bessel ... 405 43.3 56.5 9.7 23.2 36.0 6 27 9.74 4.60 2 27.80 1.10 67 Mars . . . N.P. 21.2 34.5 47.5 1.0 13.8 6 28 47.60 4.50 68 Bessel ... 405 50.5 3.8 16.5 30.3 42.8 6 31 16.78 4.55 2 29.18 0.05 69 e Mars . . . S.F. 33.5 46.8 59.8 13.3 26.0 6 32 59.88 3.44 70 Bessel ... 405 2.8 16.5 29.5 42.8 55.7 6 35 29.46 4.60 229.58 1.16 71 Mars . . . N.P. 57.5 10.8 23.8 : 37.2 50.2 6 37 23.92 4.48 72 Bessel ... 405 27.2 40.5 53.5 7.0 19.8 6 39 53.60 4.62 2 29.68 0.14 73 Mars . . . S.F. 28.8 42.0 55.2 8.5 21.3 6 41 55.16 3.97 74 Bessel ... 405 11.0 24.0 37.5 50.2 6 44 24.05 5.17 2 28. MJ 1.20 75 76 M.irs . . . N.P Bessel ... 405 47.6 18.2 0.7 31.2 14.0 27.2 44.5 58.0 39.8 10.7 6 46 13.86 6 48 44.54 4.61 4.63 2 30.66 0.02 77 78 Mars . . . S.F. 17.5 31.0 44.0 57.5 10.2 6 51 44.04 HIT.M-I ... 405 17.2 0.5 13.3 27.0 39.8 6 54 13.56 3.22 r4.45 ' —2 29.52 —1.23 Remarkt, At Hit- coniinenrnneni ol observations hiMli object., were blazing and very unsteady, renderii:" rnnia.Ms ditlU-uli in appreciate; nor ivas tlicre much I'|I.-IIIIM' Ibr Hie better at any linn, bi'iiiri. O/i. 30m. « Recorded 5. 5». at wire i:. ,, .,., .,.,,„,„ observalinlls an. better until 6*. 36m., * MifionieHT r,.enrd..d , 3.27 rev. „.,„.,, „„. v,,,r!llm,, „„„„„, .„„, |)lilzlll), „,,,„.,,„„„ C Good IIKHH,,,.,. of b()1, -^.^ ,,t.,m,m,.,R.0,,. c \ Vry tremulous. Reunite. h. in. <. in. •;. R.'V. / // Mean N. P. . . . \ineii-. -n tran>ii~ . . ,j y;i l-'.i; — 224.810 . . . . —0.055 . . . =.0 1.07 ^lr'"L ;- !''• • • . T\vn,i\ t,an-il> . . 5 -Jii .|2.3.-| •! ^i.838 . . . . —1.082 . . . ^.0 21.09 AT SANTIAGO DE CHILE. 37 h. ni. Correction for chronometer at ."> -.'i . Correction for chronometer at 5 26 DKCEMBER 2T, 1849— Continued. Results — Continued. . — 16.11 . —16.11 h. m. s. Saiuhmo sid. lime N. P 5 22 56.31 Santiago sirt. time d. V 5 26 a6.24 Interval 3 29.93 A P. P. limbs in A. R. reduced to arc Variation of A. R. in 3m. 30s. . . . Observed P. F. diameter .... h. in. A p at 5 24 . . 14.58 . + 3.29 17.69 A N. S. limb micr. in rev .... Variation of declination in 3m. 30s. . Corr. for diam. of niicr. wires Observed N. S. diameter . . . 1.027 = 20.02 — 0.04 — 2.20 17.78 0.00 h. m. A ft at 5 28 .... 0.02 DECEMBER 38, 1849. It was found impossible to observe tlir selected star to-night, because of the vicinity of the moon, a slight haze, and its apparently lesser magnitude than is assigned in Bessi-l's /ones. H would bear no illumination whatever, and could scarcely have exceeded the 10th magnitude. J. M. G. DECEMBER 39, 1849. The remarks of last ni!>ht arc applicable to this, and the haze is somewhat greater. I do not think the star can exceed the 10th or llth magnitude. Eft'orts to measure its distance from Mars proved wholly ineffectual. J. M. G. DECEMBER 30, 1849. i) . B r Chronometer time of transit. Micr. Planet— Star. Bar Thermometers. 1 Object. A. B. C. D. E. A a. AJ. Air. Wet. s li licssel . . . -KIJ 53 5 19.5 33.0 45.8 3 23 19.66 2.59 ti Mars . . . N.P. 9.5 35.8 49.3 ->.0 3 23 35.86 10.05 1 16 20 7.46 7 l:i-.-H ... 405 27.0 40.5 6.8 19.5 3 27 53.46 0.78 8 Mars . . . S.F. 44.5 58.5 . . 24.3 37.0 3 29 11.08 7.29 1 17.62 6.51 9 Bessel ... 405 2.0 15.0 2S.O 41.5 54.5 3 54 28.20 1.40 10 Mars . . . N.P. 16.5 30.0 42.8 56.2 8.5 3 55 43.80 8.94 1 14.60 7.54 11 llc~s.-l ... 405 17.5 :n.o 44.5 .-,7.7 10.5 3 58 44.24 0.66 19 Mars . . . S.F. 34.0 46.8 0.0 13.6 26.0 4 0 0.08 7.09 1 15.84 6.43 13 ... 405 52.5 5.8 19.0 32.5 45.0 4 6 18.96 0.47 14 Mars . . . N.I'. 6.5 32.7 46.0 58.8 4 7 32.71 7.84 1 13.75 7.37 15 Ili-.-s.-l ... 405 53.2 6.3 19.6 33.0 45.5 4 12 1U.52 . 16 c Mars . . . S.I'. 7.7 21.0 34.3 47.7 0.3 4 13 31.20 1 14. C8 17 . . . 405 11,6 25.3 38.2 51.5 4.3 4 17 38.14 1.90 18 Mars . . . S.F. 26.2 5-3.5 5.7 18.8 4 18 52.54 8.27 1 14.40 6.37 M ... 405 10.7 34.0 37.3 r, ii.r, 4 20 37.22 2.15 M.'IM . . . N.P. 49.5 I!.:, uj.a 4 21 49.96 il. Hi 1 12.74 7.31 21 lle-^l ... 405 41 .5 54.6 8.0 81 .8 34.0 4 24 7.86 2.20 u Ma.- . . , 8,t 8.7 21. H :t:>.:i 47.8 4 25 •: 1 13.96 6.39 •j:i I',.— <•! . . . .ID:. 10. !l 23.2 49.3 4 27 38.36 2.24 M Mars . . . N.P. M.O a^.5 2.5 u. a I •!* -18.80 +9.65 + 1 I-.MI +7.41 38 OPPOSITION OF MARS, 1849-50, DECE9IBER 30, 1849— Continued. V s Chronometer time of transit. Planet— Star. Bar. riirnnumeters. 1 £ Object. A. B. C. D. E. A a. A S. Air. Wet. ,0 6 s. s. 8. s. s. h. m. s. Eev. 1 m. s. Rev. Inches. * 0 2 25 Bessel'. . . 405 38.3 51.5 4.6 18.3 31.3 4 31 4.74 +1.40 28.178 72.1 59.3 26 Mars . . . S.F. 51.5 5.2 18.5 31.8 45.5 • 4 32 18.50 7.79 +1 13.76 +6.39 Thpr. alt. 27 Bessel ... 405 57.5 11.0 24.2 37 5 50.3 43424.10 ; 1.39 70°. 5 SSd Mars . . . N.P. 9.6 22.8 36.0 49.0 2.0 4 35 35.88 8.79 1 11.78 7.40 Bar. red. to 3-2° F. 2«.064 29 c Bessel ... 405 20.5 34.0 47.2 0.5 13.5 4 37 47.14 1.27 30 Mars . . . S.F. 34.0 47.3 0.5 14.0 26.5 4 39 0.46 7.66 1 13.32 6.39 31 Besse) ... 405 7.9 21.0 34.0 47.5 0.5 4 41 34.18 1.48 33 Mars . . . N.P. 19.5 3-2.6 45.8 59.2 11 8 4 42 45.78 8.93 1 11 60 7.45 33 Bessel ... 405 30.5 44.0 57.1 10.5 23.2 4 44 57.06 1.55 34 Mars . . . S.F. 43.0 56.7 9.8 22.5 35.5 4 4U 9.f>0 8.01 1 12.44 6.46 35 Bessel ... 405 45.0 58.3 11.3 25.0 37.6 4 49 11.44 1.69 36 Mars . . . N.P. 56.4 9.6 22.5 36.0 48.7 4 50 22.64 9.00 1 11.20 7.31 37 Bessel ... 405 49.5 2.5 15.8 29.0 41.8 4 52 15.80 1.73 38 Mars . . . S.F. 1.3 14.8 28.0 41.3 54.0 4 53 27.88 8.09 1 12.08 6.33 39 Bessel ... 405 53.5 6.8 20.0 33.3 46.0 4 56 19.92 1.76 40 Mars . . . N.P. 4.5 17.0 30.5 43.5 56.2 4 57 30.34 9.20 1 10.42 7.44 41 Bessel ... 405 8.8 22.2 35.2 48.8 1.3 4 59 35.26 1.62 42 Mars . . . S.F. 20.5 33.5 46.5 0.0 13.0 5 0 46.70 8.07 1 11.44 6.45 43 Bessel . . . 405 7.2 20.3 33.5 47.0 59.8 5 2 33.56 1.76 44 Mars . . . N.P. 17.0 30.8 43.5 57.2 9.3 5 3 43.56 9.20 1 10.00 7.44 45 Bessel . . . 405 57.2 10.5 23.5 37.3 50.2 5 6 23.74 1.87 46 Mars . . . N.P. 7.5 21.0 33.3 46.8 59.0 5 7 33.52 9.28 1 9.78 7.41 47 Bessel ... 405 36.0 49.0 2.3 15.7 28.3 5 12 2.26 1.93 «/ Mars . . . S.F. 46.9 0.0 13.0 26.3 39.0 5 13 13.04 8.27 1 10.78 6.34 49 Bessel ... 405 5.0 18.2 31.3 44.7 57.5 5 15 31.34 2.02 50 Mars . . . N.P. 14.3 27.0 40.0 54.0 6.5 5 16 40.36 9.37 1 9.02 7.35 51 Bessel . . 405 47.0 0.5 13.5 26.8 39.5 5 19 13.46 2.15 52 Mars . . . S.F. 57.8 11.0 24.0 37.5 51.0 5 20 24.26 8.4-2 1 10.80 6.27 53 Bessel ... 405 27.2 40.5 53.2 7.0 20.0 5 22 53.58 2.09 54 Mars . . . N.P. 36.5 49.5 2.3 15.8 28.3 5 24 2.48 9.42 1 8.90 7.33 55 Bessel . . . 405 52.5 5.7 18. .8 32.5 45.0 5 26 18.90 1.29 56 Mars . . . S.F. 2.5 15.7 28.8 42.2 55.0 5 27 28.84 7.80 1 9.94 6.51 57 Bessel ... 405 59.5 12.9 26.1 39.5 52.2 5 29 26.04 1.37 58 Mars . . . N P. 8.3 21.2 34.5 48.3 1.2 5 30 34.70 8.88 1 8.66 7.51 59 Bessel ... 405 3.5 16.6 30.0 43.2 56.0 5 32 29.86 1.54 60 Mars . . . S.F. 13.8 27.5 40.2 53.8 6.7 5 33 40. 4U 7.87 1 10.54 6.83 61 Bessel ... 405 16.0 29.5 42.3 55.5 8.5 5 35 4-2.36 1.55 6-2 Mars . . . N.P. 24.0 38.2 51.5 4.5 17.3 5 36 51.10 8.92 1 8.74 7.37 63 Bpssrl ... 405 37.5 51.0 4.3 17.7 30.5 5 39 4. -20 1.61 64 Mars . . . S.F. 47.5 1.0 14.2 27.5 40.2 5 40 14.08 +8.00 + 1 9.8S +6.39 AT SANTIAGO DE CHILE. 39 A*' >/utrks. : ;t slight haze or dry fop which prevents th;it flarin» ;ippear;mce so frequently presented by the planet, the night is favorable for obser- a Recorded 37.5s at wire D, 50.3s, at E. b Recorded 55.3s. nt wire A. c Neglected to read mirroim-UT ; observation omitted in mean result d Good measures. e Micrometer recorded -|- 0,27 rev. / All the succeeding measures are good. Results. h. in. s. in. s. Rev. / /; Mean N. F. . . Si.urru tiansits . 4.-M4I.1M + 1 11.687 . . . +7.412 . . . . =824.46 Mean S. F. Fifteen tiatiMts . 4 42 26.04 + 1 12.992 . . . + 6.399 . . . . =2 4.71 h. m. s. h. ni s. Correction for ehr< inornetrr at 4 40 . . . — 17.87 . . . 4 39 2.X 17 Correction for din mometer at 4 42 . . . — 17.87 . . . 4 42 8 17 . . . 2 45 00 A P. P. limbs in A . R. reduced to arc . . . 19.57 . . 1 .013 — 19 75 Variation of A. R. in 2m. 45s. . . + 2.34 Variation of declination in 2m. 45*. . . — 0.07 Olis'Tvi-il P. F. ili:i .meter 21.91 Corr. for diam. of micr. wires 2_20 Observed N. S. diameter . . . . . 17.48 h. m. H h. m. „ A p at 4 39 . . . 0.16 A p at 4 42 0 14 DECEMBER 31, 1849. No. for reft-ri'iHM-. (Ilijl'Ct. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers A. B. 0. D. E. A a. A <5. Air. Wet. 8. 9. 8, s. s. h. m. a. Rev. s. Rev. Inches. • • 1 2 3 4 5 .Mars . . . N,P. . . .405 Mars . . . S.F. Bessi'l . . . 405 Mars . . . N.P. 4.5 • • 30.5 . . 56.8 51.4 . . 49.2 41.5 , . . . . 19.2 3 5-2 30.69 3 52 37.98 3 56 22.99 3 56 28.23 3 57 52.97 +5.45 ±0.00 +4.56 ±0.00 +5.48 —7.29 5.24 +5.45 4.56 28.137 Ther. att. 74" .2 Bar red. to 32" F. 28.012 74.2 60.6 56.5 26.5 15.2 33.0 53.0 6 Hi — .-1 ... 405 46.5 13.0 . . 3 57 59.63 ±0.00 6.66 5.48 7 Mars . . . S.F. 2.3 39.0 . . 55.2 4 0 28.92 +4.66 8 l'.< "<•! ... 405 22.0 48.0 ; . . 4 0 34.88 ±0.00 5.96. 4.66 9 Mars . . . N.P. I--'.:, 39.7 . . 5.0 4 339.15 +5.53 10 Bessel . . 32.8 ' . . 59.2 . . 4 3 45 88 ±0.00 6.73 ; 5.58 i 11, i Mara . . . P.P. 29.0 55.5 . . '21.5 4 8 55.55 +4.70 12 l!i— 1 ... 405 48.7 ; . . 15.3 . . 4 9 1 .88 ±0.00 6.33 ; 4.70 13 Mars . . . N.P. 41.0 . . ! . . 21.0 . . 4 12 7.52 +5.57 M l!i — i-l ... 405 2.0 15.0 4 12 15.07 ±0.00 7.55 ! 5.57 15 16 Mars . . S.F. Ili'-si'l ... 405 21.2 . . ' 48.0 41.3 . . . . 14.0 8.0 .. 4 14 47.74 4 14 54.53 +4.60 ±0.00 6.79 4.60 1^ Mara . . . N.P. 55.0 j • ' i ' ' . . 47.5 4 18 21.29 +5.61 IK ll-s-H ... 405 16.2 I 29.2 43.0 . . 4 18 29.40 ±0.00 8.11 5.61 11 Mars . . . fJ.F. 57.2 . . £<.:, . . 49.8 4 20 23.59 +4.59 •>:> • . . . 405 17.;* 44.0 . . 4 20 30.53 ±0.00 6.94 4.59 21 Mars . . . N.P. 1.3 •ll.il . . 4 22 27.77 22 t 3fi.ll 49.5 2.3 :>6.08 ±0.00 N.;il 5.62 23 Mara . . . S.F. 59.5 13.0 26.0 39.5 4 23 26.06 +4.77 24 1 . . .405 • • SO. 2 33. a 4li..-| 0.1 4 95 33.16 ±0.00 7.10 4.77 2.-H Mars . . . N P. 26.0 +5.74 26 H.--.'1 . . . 4(l.-> . . 47 .3 , . i4.a . . 4 29 0.63 ±0.00 —8.39 +5.74 40 OPPOSITION OF MARS, 1849-50, 1>E<'EMHER 31, 1849— Continued. for refercm-'-. Object. Chronometer linn- of Iran. -it. Mean of win-- Micr. Planet— Star. Bar. Tlicruioiiirtrr* A. B. C. D. E. A a. AA Air. Wet. c s. s. s. g. s. h. in. s. Rev. s. Rev Inches. • • 2 m Mars . . . S.F. 29.3 43.0 56.5 9.7 23.5 4 32 56.20 +4.64 28. 137 74.2 60.6 28c Bessel ... 405 50.5 4.0 17.2 30.2 4 33 3.85 ±0.00 —7.65 +4.64 Ther. alt Mars . . . N.I'. 37.2 30.0 4 36 3.74 +5.64 74»,2 30 B.-ssel ... 405 46.5 59.7 13.0 26.4 39.0 4 36 12.92 ±0.00 9.18 5.64 Iliir. red. to 32° F. 28.012 31 Mars . . . S.F. 53.5 7.0 20.2 33.5 46.2 4 41 20.08 +4.56 32 Bessel . . . 405 15.0 28.0 41.5 54.5 4 41 28.01 ±0.00 7.93 4.56 33 Mare . . . N.P 16.3 29.4 56.0 8.5 4 45 42.57 +5.56 34 Bessel ... 405 • • 39.2 52.3 5.0 18.3 4 45 53.08 ±0.00 9.51 5.56 35 Mars . . . S.F. 55.3 S.B 47.5 4 55 31.40 +4.51 38 Bessel . . . 405 17.8 30.3 56.9 4 55 30.66 ±0.00 9.26 4.51 37 Mars . . . N.P. 25.3 38.3 18.0 4 59 51.70 +5.56 38 Bessel ... 405 49.0 2.2 28.2 5 0 2.12 ±0.00 10.42 5.56 39 Mars . . . S.F 44.0 57.5 23.8 5 1 10.38 +4.54 40 Bessel ... 405 6.5 20.0 33.5 45.5 5 1 20.26 ±0.00 9.88 4.54 41 Mars . . . N.I'. 29.5 56.0 9.5 22.0 5 6 55.96 +5.59 42 Bessel ... 405 40.5 53.5 •33.0 5 7 6.83 ±0.00 10.8" 5.59 43 Mars . . . S.F. 30.0 t 9.0 5 8 56.02 +4.54 44 Bessel ... 405 39.8 53.0 6.8 32.0 5 9 6.26 ±0.00 10.24 4.54 45 Mars . . . N.P. 5.5 19.0 45.5 58.0 5 15 33.02 +5.54 46 Bessel . . . 405 42.5 9.5 5 15 42.90 ±0.00 10.88 5.54 47 Mars . . . S.F. 12.5 38.8 52.2 5.5 5 18 38.96 +4.51 48 Bessel . . . 405 • • 36.0 • • 2.5 5 18 49.13 ±0.00 10.27 4.51 49 Mars . . . N.P. 47.5 0.8 27.8 40.5 5 20 14.17 +5.52 50 Bessel ... 405 12.5 25.5 52.0 5 20 25.66 ±0.00 10.49 5.52. 51 Mare . . . S.F. 28.2 11.5 8.0 21.0 5 24 54.69 +4.51 52 Bessel ... 405 51.0 4.5 31.3 5 25 4.59 ±0.00 9.90 4.51 53 Mars . . . N.P. 23.8 37.2 50.5 3.5 16.5 5 26 50.30 +5.52 54 d Bessel ... 405 50.0 3.0 28.5 5 27 2.83 ±0.00 12.53 5.52 55 Mars . . . S.F. 30.3 43.5 56.5 10.5 5 31 56.75 +4 55 56 Bessel ... 405 40.5 53.5 7.5 21.0 34.0 5 32 7.30 ±0.00 10.55 4.55 57 Mars . . . N.P. 31.5 44.8 58.0 24.3 5 35 58.10 +5.54 58 Bessel ... 405 • • 57.5 10.5 24.0 5 36 10.58 ±0.00 12.48 5.54 59 Mitrs . . . S.F. 43.2 56.5 9.5 22.5 35.5 5 39 9.44 +4.53 60 Bessel ... 405 8.0 21.0 34.5 47.5 5 39 21.13 ±0.00 11.69 4.53 61 Mars . . . N.P. 34.3 48.0 5 46 0.98 +5.53 62 ! . . . 405 0.5 14.0 40.2 5 46 13.89 ±0.00 12.91 5.53 63 Mai-H . . . S F. 37.0 50.5 17.5 29.2 5 52 3.57 +4.56 64 Bessel ... 405 2.3 41.5 5 53 15.40 ±0.00 11.83 4.56 65 M;irs . . N.P. 38.0 51.2 17.8 30.5 5 55 4.39 +5.50 66 Il'-M'l ... 405 5.0 44.0 5 55 18.00 ±0.00 13.61 5.50 67 M:ir* . . . S F. 18.5 32.0 58.2 11.0 5 57 44.94 +4.52 68 Bessel ... 405 44.2 33.f) 5 57 57.35 ±0.00 12.41 4.52 69 Mars . . . N.P. 13.5 27.2 54 5 7.0 6 0 40.57 +5.48 70 Bessel . . . 405 21.3 6 0 55.13 ±0.00 14.55 5.48 71 Mars . . . S.F. 40.2 53.5 20.0 32.5 6 5 C..5V +4.49 72 i . . .405 B.5 45.8 6 5 19.65 ±0.00 —13.08 +4.49 AT SANTIAGO DE CHILE. 41 DECEMBER 31, 1K4*>— Continued. Remarks. Owing to the vicinity of the objects, it was extremely difficult to place each accurately in cdntact with its wire, when on the meridian wire. The first and second sets of measure:* art- indifiVrent. a Recorded 39s. at wire A. b Poor measures. c Recorded 32s. at wire E. d Recorded 40s. at wire B ; 53s. at wire C. Results. h. m. s. s. Rev. / n Mean N. P. . . Eighteen transits . 4 53 29.17 — 10.032 .... +5.554 . . . . = 1 48.25 Mean S. F. . . Eighteen transits . 4 57 32.44 - 9.058 .... +4.574 . . . . =1 29.15 li. m. s. h. m. s. Correction for chronometer at 4 53 . . + 18.63 4 53 10 54 Correction for chronometer at 4 57 + 18.63 S:uiti;i"o sid. time S. F 4 57 13 81 4 3 27 A P F. limbs in A. R. reduced to arc . . 14.61 A N. S. limbs micr. in rev. ... , . 0.980 = 19.10 Variation of A. R. in 4m. 3? . . + 3.33 Variation of declination in 4m. 3s. + 0.11 Observed P. F. diameter . . 17.94 Corr. for diam. of micr. wires . . — 2.20 Observed N. S. diameter . . . 16.79 h. m. ii h. in. n A o at 4 53 . 0.12 A p at 4 57 . 0.10 JANUARY 1, 185O. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. £. A a. A A Air. Wet. s. 8. s. a. s. h. m. s. Rev. m. s. Rev. Inches. • • 1 2 Mars . . . N.P. Bessel ... 405 12.5 35.5 25.5 48.3 38.8 1.2 52.2 15.5 5.0 27.8 3 15 38.80 3 17 1.66 +6.40 3.01 —1 22.86 +3.39 28.188 74.5 58.3 3 4 6 Mars . . . B.F. Bcssel . . . 4(15 Mars . . . N.P. 12.5 34.0 50.3 25.5 47.2 3.5 38.8 0.2 16.8 52.2 13.8 30.1 5.0 26.5 43.0 3 19 38.80 3 21 0.34 3 23 16.74 5.57 3.12 +3.48 1 21.54 2.45 Ther. att. 71°. 5 Bar. red. to 32° F. 28.071 6 lie• 1 ... 405 54.3 7.5 20.5 34.0 40. 7 6 11 20.60 2.24 2 46.26 —0.24 65 Mars . . . N.P. 38.5 52.2 5.5 18.8 31.2 6 13 5.24 3.02 66 lle».'l . . . 405 26.7 40.0 53.0 6.5 19.5 6 15 53.14 2.23 2 47.90 +0.80 67 Mars . . . S.F. 10.8 24.3 37.5 50.8 3.5 6 17 37.38 2.01 68 l!rs.-i.'l ... 405 57.6 11.0 24.2 37.5 50.3 6 20 24.12 2.29 2 46.74 —0.38 69 Mars . . . N.P. 38.2 51.5 4.7 18.2 30.8 6 22 4.68 3.03 70 Bessel ... 405 26.5 40.0 53.3 6.5 19.5 6 34 53.14 2.33 2 48.46 +0.71 71 Mars . . . S.F. 14.6 28.0 41.2 54.5 7.5 6 26 41.16 2.09 72 Bessel . . . 405 2.2 15.5 38.5 42.0 55.0 6 29 28.64 +2.25 —2 47.48 —0.16 Remarks. An unfavorable night for observations, either because of much motion to the planet, and a flaring disc, or a partial obscuration of the comparing star by light cirri, that rendered measures doubtful under ordinary illumination. e As the light of the east lamp went out just on obser- ving Mars, it was removed, and not replaced until af- ter observing the comparing star. The removal of its weight is shown in the measures. / Good. g The observations that follow arc more reliable. a Micrometer recorded -f- 3.46 rev. 6 Somewhat better than preceding. c Recorded 21.2s. at wire C. d Seen through haze. Results. h. in. e. m. 8. Rev. / „ Mean N. P. . - . Eighteen transit* . . 4 56 27.54 — 2 43.667 . . . . + 0.914 . ... =0 17.81 Mean S. F. . . Eighteen transits . . 5 2 30.04 — 2 42.701 .... —0.102 . . . . =0 1.99 h. in. s. h. m. s. ''ion for chronometer at 4 56 . . .)Q ;j . 9nnticii>o Bid linn1 N. P. . . 4 56 7.10 Correction ior chronometer at 5 2 . . . —20.44 ... 5 2 9.60 ... 6 2.50 A P. F. limbs in A. R. reduced to arc . . . 14.49 A N. S. limbs micr. in rev. . . . . . 1.016=19.80 . . + 4 56 Variation of dci-Imation in 6m. 2s. . . — 0.20 Observed P. F. diameter . . 19.05 Corr. for cli'ini. ')( inirr. \\ires . . . — 2.20 Observed \. S. diameter . . 17.40 h. m. n h. Mi. 11 A o at 4 57 . . 0.0-J A o at 5 3 . . 0.00 46 OPPOSITION OF MARS, 1849-50, JANUARY 4, 1850. £ b Chronometer time of transit. Planet— Star. Thermometer*. I Mean of wires Micr. Bar. £ £ j- Object. A. li. C. D. E. Aa A<5 Air. Wet. £ a s. s. s. s. s. li. in. s. Rev. in. s. Rev. Inches. 0 0 Z 1 Mars . . . N.P. 28.0 41.3 54.7 8.0 20.5 3 48 54.50 +3.31 28.110 70.0 55.4 2 Bessel ... 523 . 47.3 0.5 13.5 26.5 3 50 0.33 5.01 —1 5.83 —1.70 Tlier. att. 3 Mars . . . S.F. 17.0 30.5 43.5 57.0 9.8 3 52 43.56 0.65 70°. 5 4 Bcssel . . . 533 35.3 48.5 1.5 14.5 3 53 48.33 3.21 1 4.77 2.56 Bar red. to 32° F. 27.996 5 Mars . . . N.P. 48.4 1.5 14.8 28.0 41.2 3 56 14.78 1.60 6 Bessel ... 523 8.0 21.2 34.5 47.2 3 57 21.11 3.33 I 6.22 1.73 7 Mars . . . S.F. 31.2 44.5 58.0 11.3 24.2 3 58 57.85 0.32 8 Bessel . . . 533 36.5 49.5 2.8 16.5 29.0 4 0 2.86 2.93 1 5.01 2.61 9 Mars . . . N.P. 23.2 36.5 49.7 3.0 15.8 4 1 49.64 1.41 10 Bessel ... 523 31.0 44.0 56.5 9.5 22.3 4 2 56.66 3.05 1 7.02 1.64 11 Mars . . S.F. 18.8 32.0 45.2 58.8 11.2 4 4 45.20 0.97 12 Bessel ... 523 25.0 37.5 50.5 4.2 17.0 4 5 50.80 3.67 1 5.60 2.70 13 Mars . . . N.P. 12.0 25.3 38.5 51.8 4.5 4 7 38.42 1.83 14 Bessel ... 523 19.5 32.2 45.5 58.8 11.5 4 8 45.50 3.60 I 7.08 1.77 IS a Mars . . . S.F. 17.2 43.5 57.2 9.7 4 12 43.42 0.78 16 Bessel ... 523 23.8 36.5 49.5 3.0 15.5 4 13 49.66 3.49 1 6.24 2.71 17 Mars . . . N.P. 41.4 54.5 7.8 21.2 34.0 4 16 7.78 1.94 18 Bessel ... 523 48.8 2.2 15.2 28.5 41.3 4 17 15.20 3.62 1 7.42 1.68 19 Mars . . . S.F. 48.0 1.2 14.3 27.7 40.5 4 20 14.34 1.04 20 Bessel ... 523 54.3 7.5 20.5 34.0 46.8 4 21 20.62 3.68 1 6.28 2.64 21 Mars . . . N.P. 42.4 55.5 8.5 22.0 34.8 4 23 8.64 1.91 22 Bessel ... 523 50.0 3.2 16.5 29.8 42.3 4 24 16.36 3.58 1 7.72 1.67 23 Mars . . . S.F. 47.0 0.2 13.4 •26.8 39.8 4 26 13.44 1.02 24 Bessel ... 523 53.5 6.5 19.6 33.0 45.5 4 27 19.62 3.72 1 6.18 2.70 25 Mars . . . N.P. 57.7 11 0 24.2 37.5 50.5 4 29 24.18 2.49 26 Bessel ... 523 6.0 19.2 32.2 45.5 58.2 4 30 33.22 4.20 1 8.04 1.71 27 Mars . . . S.F. 38.5 52.3 5.0 18.8 31.2 4 34 5.14 1.50 28 Bessel ... 523 45.5 59.0 12.2 25.5 38.2 4 35 12.08 4.20 1 6.94 2.70 29 Mars . . . N.P. 36.5 50.2 3.2 16.5 29.3 4 37 3.14 1.58 30 Bessel . . . 523 44.0 57.0 10.2 23.5 36.2 4 38 10.18 3.34 1 7.04 1.76 31 Mars . . . S.F. 6.8 20.2 33.2 46.6 59.5 4 40 33.22 1.59 aai Bessel ... 533 14.2 27.2 40.4 54.0 6.5 4 41 40.46 4.33 1 7.24 2.74 33 Mars . . . N.P. 30.5 43.5 57.0 10.3 22.8 4 44 56.82 1.53 34 Bessel ... 533 39.2 53.5 5.9 19.0 31.7 4 46 5.66 3.21 1 8.84 1.68 35 Mars . . . S.F. 11.0 24.3 37.5 50.5 3.5 4 48 37.36 0.61 36 Bessel ... 523 31.5 45.0 11.2 4 49 44.89 3.32 1 7.53 2.71 37c Mars . . . N.P. 42.5 55.5 9.0 22.3 35.0 4 52 8.86 1.60 38 Bessel ... 523 51.2 5.0 17.8 31.3 43.8 4 53 17.82 3.34 1 8.96 1.74 39 Mars . . . S.F. 39.2 53.5 5.5 19.0 31.7 4 55 5.58 0.71 40 Bessel ... 523 47.5 0.5 13.5 27.0 39.5 4 56 13.60 3.47 1 8.02 2.76 41c Mars . . . N.P. 10.1 33.4 36.5 50.0 2.5 4 58 36.50 1.74 42 Bcssel ... 523 19.8 33.0 46.5 59.5 12.5 4 59 46.26 3.49 1 9.76 1.75 43 Marfi . . . S.F. 33.2 46.3 59.5 12.8 25.5 5 1 f,9.46 0.84 44 !<<--.-i-l ... 523 52.5 6.2 19.5 32.5 45.2 5 16 19.18 3.87 1 9.08 2.89 53c Mars . . . N.P. 51.8 4.9 18.2 31.2 44.2 5 18 18.06 2.14 54/ Bessel ... 523 2.5 15.2 28.5 42.3 54.7 5 18 28.64 3.94 1 10.58 1.80 55 Mars . . . S.F. 7.0 21.5 34.5 47.8 0.5 5 21 34.26 1.12 56 Bessel ... 523 30.8 44.0 57.2 10.0 5 22 43. 88 4.03 1 9.62 2.91 57 Mars . . . N.P. 1.0 14.5 27.8 41.3 53.5 5 24 27.62 2.19 58 Biinscl ... 523 25.3 38.5 52.0 4.7 5 25 38.51 4.02 1 10.89 1.83 59 M;us . . . S.F. 55.3 8.7 21.7 35.3 47.9 5 27 21.76 1.22 60 Bessel .* . . 523 18.8 32.0 45.5 58.2 5 38 33.01 4.03 1 10.25 2.81 61 Mare . . . N.P. 24.4 37.8 51.0 4.2 17.0 5 30 50.88 2.29 62 Bessel ... 523 35.5^ 48.5 2.2 16.0 28.8 5 32 2.20 4.14 1 11.32 1.85 63 Mars . . . S.F. 51.4 5.0 18.2 31.5 43.7 5 34 17.96 1.40 64 Itessel . . . 523 15.0 28.2 41.5 54.5 5 35 28.18 4.26 1 10.32 2.86 65g Mars . . . N.P. 8.2 21.5 34.7 48.2 1.0 5 38 34.72 2.46 66 Bessel ... 523 20.0 33.0 46.2 0.0 12.5 5 39 46.34 4.25 1 11.63 1.79 67 Mars . . . S.F. 3.7 17.2 30.2 43.5 56.5 5 41 30.22 1.49 68 Bessel ... 523 14.5 27.5 40.8 54.2 6.8 5 42 40.76 4.33 1 10.54 2.84 69 Mars , . N.P. 44.6 58.1 11.0 24.5 37.2 5 44 11.08 2.46 70 Bessel ... 523 56.5 9.7 23.0 36.5 49.2 5 45 22.98 4.37 1 11.90 1.91 71 Mars . . . 8.F. 7.5 30.8 34.0 47.5 0.2 5 47 34.00 1.60 72 Bessel ... 523 18.5 31.5 45.0 58.5 11.2 5 48 44.94 4.49 1 10.94" 3.89 73 Mars . . . N.P. 4.0 17.5 30.5 43.8 56.5 5 50 30.46 2.60 74 Bessel . . . 523 16.2 29.4 42.5 • 56.2 8.8 5 51 42.62 4.38 1 12.36 1.78 75 d Mars . . . S.F. 10.6 24.2 37.5 51.0 35.0 5 53 37.66 1.54 76 Bessel ... 523 22.0 35.5 47.5 1.0 13.5 5 54 47.90 4.47 1 10.24 2.93 77 Mars . . . N.P. 30.0 43.2 56.3 9.8 22.5 5 56 56.36 2.43 78 Bessel ... 523 42.5 55.5 8.5 22.5 35.2 5 58 8.84 4.33 1 12.48 1.90 79* Mnrs . . S.F. 21.5 35.0 48.2 1.5 14.2 5 59 48.08 1.65 80 licssH ... 523 33.2 46.5 0.0 13.3 26.0 6 0 59.80 4.52 1 11.72 3.87 81 Mars . . . N.P. 43.0 56.5 9.5 22.8 35.7 6 3 9.50 2.47 82 llc-si-l ... 523 56.0 9.2 22.2 35.7 48.4 6 4 22.30 4.50 1 12.80 3.03 83 Mars . . . S.F. 40.5 53.6 7.0 20.2 33.2 6 6 6.90 1.62 84 Bessel ... 523 51.7 5.5 18.7 32.2 45.0 6 7 18.62 4.49 1 11.72 2.87 85 Mars . . . N.P. 30.4 43.5 56.7 10.2 22.9 6 8 56.74 2.42 86 ll.-ssrl ... 523 43.5 57.2 10.2 2;i.7 36.5 6 10 10. •« 4.50 1 13.48 2.08 87 Mars . . . S.F. 28.2 41.2 54.7 8.0 20.8 6 11 54.58 1.58 88 . . .523 40.0 53.4 B.« 19.5 32.5 6 13 6.38 4.48 1 11.80 2.80 MM Mare . . . N.P. 1.5 15.0 41.5 54.5 6 15 28.16 2.52 n Bessel ... 523 15.5 28.5 4-J.O 55.5 7.8 6 1C 41.86 4.48 1 13.70 i.n 91 i Mars . . . S.F. 19.5 32.7 46.0 59. 3 is. a 6 18 45.94 1.83 92 llr-ssrl ... 523 31.8 45.5 58.5 H.tl 25.0 6 19 58.56 +4.76 —1 12.62 —2.93 48 OPPOSITION OF MARS, 1849-50, JANUARY 4:, 1S5O— Continued. 0.' o • Chronometer time of transit. Planet — Star. Bar. Thermometers. i i Object. . A. B. C. n. E. A a. A j. Air. Wet. £ 0 s. s. s. s. s. h. m. s. Eev. m. s. Rev. Inches. • • K 93 Mars . . . N.P. 59.5 12.7 . 26.0 39.5 52.3 6 21 26.00 +2.58 28.110 70.0 55.4 94 Bessel ... 523 13.2 26.5 39.8 53.3 6.0 6 22 39.76 4.54 —1 13.76 —1.96 j Ther. att. 95 96 Mars . . . S.P. Bessel ... 523 13.2 25.0 26.5 38.8 39.5 5-3.0 53.0 | 5.8 5.5 j 18.2 6 24 39.60 6 25 51.90 1.58 4.57 1 12.30 2.99 74.°4 Bur. red. to 32° F. 27.912 97 Mars . . . N.P. 24.5 38.3 51.8 5.0 17.7 6 27 51.46 2.57 98 Bessel ... 523 39.0 52.8 6.0 19.3 32.0 6 29 5.82 4.48 1 14.36 1.91 99 Mars . , . S.F. 13.5 26.8 40.0 53.5 6.3 6 30 40.02 1.46 100 Bessel ... 523 26.7 40.0 53.2 6.8 19.5 6 31 53.24 +4.43 — 1 13.22 —2.97 Remarks. The night was not favorable for observations. Frequent cold blasts of wind, following a very hot day, generated currents in the strata of air. There was much snow on the mountains yesterday evening and last night— partially the cause, perhaps, of the present atmospheric condition. I do not think the comparing star can exceed the 9.10 magnitude, though stated by Bessel as 8.9. a More steady, i Recorded 7.5s. at wire E. c Both objects very unsteady. i Very unsteady. e Recorded 9«. at wire B. Mean N. P. . Twenty- five transits . . Mean S. F. . Twenty-five transits . . h. m. Correction for chronometer at 5 10 Correction for chronometer at 5 13 . . A P. F. limbs in A. R. reduced to arc , . / Recorded 55.7s. at wire E. g Steady. h Tolerably steady, i Good observations. Rev. ' 1 808 — 0 35.24 54.69 . s. 44.27 6.88 22.61 n 19.45 0.13 2.20 17.12 0.06 Results. h. m. s. 5 10 6.81 5 13 29.43 s. . —22.54 . —22.54 h. m. 16.60 -1- 2.36 m. s. — 1 10.133 . — 1 9.026 , Santiago sid. Santiago sid 2 806 . — 0 h. m time for N. P 59 time for S. F 5 13 3 A N. S. liml Variation of Corr. for dia Observed N. h. m. A p at 5 14 is micr. in rev 0.998 = declination in 3m. 22s. . . — m. of micr. wires . • . . — S. diameter Observed P. F. diameter h. m. A p at 5 10 18.96 n 0 04 JANUARY 5, 1850. The night of the 5th, until the planet had passed the meridian, was cloudy. JANUARY 6, 1850. j Chronometer time of transit. Planet— Star. Thermometers. a t£ £ Object. A. B. C. D. E. A a. & j. Air. Wet. 6 o 2 s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. • - 1 Mars . . . N.P. 19.5 32.5 45.7 59.2 11.8 3 41 45.74 +2.52 28.178 67.5 56.7 2 Bessel ... 523 33.2 46.4 59.5 13.0 25.5 3 44 59.52 10.04 —3 13.78 —7.52 Ther. att. 3 Mars . . . S.F. 52.5 5.8 19.0 32.4 45.3 3 48 19.00 1.48 6S°.0 4 Bessel ... 523 5.5 18.8 31.8 45.2 58.0 3 51 31.86 10.04 3 12.86 8.56 B:ir. red. to ;K° F. 28.071 5 Mars . . . N.P. 51.6 5.0 18.0 31.5 44.3 3 53 18.08 3.03 6 Bessel ... 523 19.2 32.2 . . 58.2 3 56 32.19 +10.53 —3 14.11 —7.50 AT SANTIAGO DE CHILE. 49 JANUARY 6, iv-.o < oiiliiin. — • •] ... 523 13.0 26.0 39.2 52.4 5.1 4 22 39.14 9.60 3 14.04 8.59 13 Mar* . . . N.P. 52.0 6.0 19.0 32.5 45.2 4 24 18.94 1.33 14 Bessel . . . 523 8.2 21.2 34.5 48.0 0.8 4 27 34.54 9.05 3 15.60 7.72 1.-,,. Mar> . . . S.F. 58.0 12.0 25.0 38.5 51.2 4 29 24.94 0.58 18 Hi'««H . . . .-,33 12.8 25.7 39.0 52.5 5.2 4 32 39.04 9.33 3 14.10 8.75 17 Mars . . . N.P. 13.3 26.5 40.0 53.0 5.7 4 34 39.90 1.29 18 He— <•! ... 523 • • 55.5 9.2 23.0 4 37 55.69 9.01 3 15.79 7.72 ID Mars . . . S.F. 52.0 5.5 18.5 32.0 44.7 4 40 18.54 0.46 II' '--''I . . . 523 20.5 33.5 47.0 59.5 4 43 33.51 9.24 3 14.97 8.78 21 Mars . . . N.P. 48.2 1.5 14.5 28.0 40.8 4 45 14.60 1.69 22 H>>ss,-l ... 523 4.5 18.0 31.2 44.7 57.5 4 48 31.18 9.47 3 16.58 7.78 23 Mara . . . S.F. 7.5 21.0 34.0 47.4 0.1 4 50 34.00 0.76 21 l!i'ss.-l ... 523 24.0 36.8 49.5 3.0 15.5 4 53 49.76 9.46 3 15.76 8.70 25 Mars . . . N.P. 25.5 39.0 52.0 5.5 18.2 5 39 52.02 1.08 26 Bessel ... 523 44.5 58.0 10.8 24.2 37.0 5 43 10.90 8.85 3 18.88 7.77 27 i Mars . . . S.F. 47.3 0.5 13.5 27.2 39.5 5 45 13.60 1.20 28 Bessel . . . 523 57.0 10.5 23.5 37.0 49.7 5 49 23.54 10.12 4 9.94 8.92 29 Mars . . . N.P. 1.5 14.5 27.5 41.0 53.8 5 50 27.66 2.11 30 Bessel ... 523 21.2 34.0 47.2 0.5 13.2 5 53 47.22 9.99 3 19.56 7.88 31 Mars . . . 8.F. 8.0 21.3 34.5 48.0 0.7 5 55 34.50 0.81 32 Bessel ... 523 27.0 40.2 53.2 16.8 19.3 5 58 53.30 9.58 3 18.80 8.77 33 34 Mars . . . N.P. Bessel ... 523 58.0 18.2 11.5 31.5 24.5 44.5 37.8 58.0 50.5 10.7 6 0 24.46 6 3 44.58 1.93 9.77 3 20.12 7.84 35 Mars . . . S.F. 15.0 28.5 41.5 54.8 7.5 6 5 41.46 0.94 36 Bessel . . . 523 34.3 47.5 0.5 14.0 26.8 6 9 0.62 +9.81 —3 19.16 —8.87 Remarks. Not a very favorable night for observations. a Very unsteady. A slip of the instrument in A. R. after observing Mars. Rejected. Results. h. in. s. m. f. Rev. / „ Mean N. P. . . First six transit* . 4 14 5.96 — 3 15.123 . . . —7.643 . . . . =228.96 Mean S. F. . First six transits . 4 21 14.2!) 3 14.172 . . . 8.651 . . . . 2 48.61 Mean N. P. . Next three trruiMls . 5 50 14.71 3 19.520 . . . 7.830 . . . . 2 35.61 Mean 3. F. . Next two transits . . 6 0 37.98 — 3 18.980 . . . —8.820 . . . . =251.90 h. m. h. m. s. h. m. h. m. a. Correction for chronometer at 4 14 . — 28.63 Correction for chronometer at 5 fO . . — 28.82 Correction for c-hronometer at 4 dl . — 28.64 Cor rrction for chronometer at 6 1 . . — 28.84 Santiago sid. time N. P. ... 4 13 37.33 -'> sid time \. P 5 49 45.91 tun<' S. F. 4 20 45.65 V- '.,"., - H tinit1 S F 6 0 9 14 7 8.32 Interval 10 23.23 7° 50 OPPOSITION OF MARS, 1849-50, JANUARY O, 185O— Coutlnnrtl. Results — Continued A P. F. limbs in A. R. reduced to arc . . . 14.26 Variation of A. R. in 7m. 8s + 4.48 Observed P. F. diameter 18.74 A N. S. limbs micr. in rev 1.008=19.65 Variation ot' declination in 7m. 8s. . . — 0.29 Corr. for diam. of inicr. wires .... — 2.20 niisi-m-d N. 8. diameter 17.16 A P. F. limbs in A. R. reduced to arc ... 8.10 Variation of A. R. in 10m. 23s + 6.51 Observed P. F. diameter 14.61 Apat415 0-16 A pat 4 22 0.19 A N. S. limbs micr. in rev 0.990 = 19.29 Variation of declination In 10m. 23s. . — 0.44 Corr. for diam. of inicr. wires ... — 2.20 Observed N. S. diameter 16.65 b. A p at 5 51 A ft at 6 2 in. 0.17 0.19 JANUARY 7, 1850. V Chronometer time of transit. Planet— Star. Tlii'riimmeters. 1 . Object. A. B. c. D. E. A a. Ad. Air. Wet. 6 s. - s. s. 8. li. in. s. Rev. m. s. Rev. Inches. • ' 1 Mars . . . N.P. 47.5 0.7 13.8 27.2 39.9 3 39 13.82 -f- 0.98 28.163 71.4 56.8 2 Bessel ... 523 0.0 13.0 26.0 39.5 52.5 3 43 26.20 11.66 —4 12.38 —10.68 Tlicr. alt. 3 Mars . . . S.F 19.0 32.5 45.5 58.8 11.5 3 46 45.46 1.71 69°. 5 4 Bessel . . 523 30.5 43.5 56.5 10.0 23.0 3 50 56.70 13.52 4 11.24 11.81 Bar. red to 32° F. 28.052 5 Mare . . . N.P. 53.3 6.5 19.8 33.0 45.7 3 55 19.66 2.19 6 Bessel ... 523 5.3 19.5 32.5 46.0 58.7 3 59 32.40 12.99 4 12.74 10.80 7 Mars . . . S.F. 6.0 19.5 3S.7 46.0 58.8 4 1 32.60 2.00 8 Bessel ... 523 17.8 31.0 44.5 58.2 11.0 4 5 44.50 13.75 4 11.90 11.75 9 Mars ... N.P 32.5 45.2 58.0 11.5 24.2 4 7 58.28 0.84 10 Bessel . . . 523 45.5 59.0 12.0 25.3 38.0 4 12 11.96 11.58 4 13.68 10.74 11 Mars . . . S.F. 42.2 55.5 8.5 22.0 34.7 4 15 8.58 1.49 13 Bessel ... 523 54.6 8.2 21.5 35.0 47.5 4 19 21 .36 13.27 4 12.78 11.78 13 Mars . . . N.P. 37.2 50.5 3.7 17.0 29.7 4 22 3.62 2.82 14 Bessel ... 523 5.0 18.0 31.5 44.2 4 26 18.06 13.59 4 14.44 10.77 15 Mars . . . S.F 37.0 50.2 3.5 16.8 29.5 4 28 3.40 1.98 16 Bessel ... 523 50.3 3.5 16.8 30.2 43.0 4 32 16.76 13.72 4 13.36 11.74 17 Mars . . . N.P. 56.7 9.8 22.8 36.2 49.0 4 34 22.90 3.12 18 Bessel ... 523 11.5 24.5 37.7 51.2 43.0 4 38 37.58 13.91 4 14.68 10.79 19 Mars . . . S.F. 28.5 41.5 54.7 8.1 21.0 4 40 54.76 2.43 20 Bessel ... 523 42.0 55.5 8.5 22.0 34.8 4 45 8.56 14.23 4 13.80 11.80 21 Mars . . .N.P. 25.5 38 5 51.5 5.2 17.8 4 48 51.70 1.81 23 Bessel . . . r,33 53.5 6.7 19.8 32.5 4 53 6.51 12.63 4 14.81 10.82 23 Mars . . . S.F. 39.3 52.5 5.7 19.0 31.4 4 55 5.58 0.73 24 Bessel . . . 523 53.5 7.0 20.0 33.5 46.0 4 59 20.00 12.59 4 14.42 11.86 25 a Mars . . . N.P 46.3 50.8 12.7 M.9 38.8 5 1 12.70 1.73 26 Bessel ... 523 3.U 15.0 2«.0 42.0 54.5 5 5 28.:iO 12.51 4 15.60 10.78 274 Mars . . . S.F 11 3 35.0 38.2 51.5 4.2 5 7 38.04 0.86 28 Bessel ... 523 36.5 an. 5 53.0 6.5 19.2 5 11 52.94 12.73 4 14.90 11.87 29 Mars . . . N P 3.1.8 39.0 52.2 5.5 18.3 5 13 5-2.16 1.78 30 Bessel . . . 523 41.0 54.2 7.5 20.5 33.5 5 18 7.31 12.72 4 15.18 10.94 31 Mars . . . i*.F. 36.5 49.8 2.8 16,2 29.0 5 20 -J.8H 0.92 32 Hi-.-i.cl . . 523 51 .8 5.0 18.5 31.8 44.5 5 -24 lx.3-> 13.00 4 15.46 12.08 33 Mui . . . IV. p. 26.0 S9.5 52.7 6.0 t 18.8 5 25 .V> do •I 14 34 »>'ss.-l . . . 523 43.5 56.8 10.0 23.5 :«i.-2 5 30 1» mi + 13.00 —4 17.40 —10.46 AT SANTIAGO DE CHILE. 51 JANUARY T, 185O— Continued. s Chronometer time of transit. Planet— Star. Thermometers. • Mull, "•-...: Micr. Bar. m z 2 Obj.vi. A. B. C. D. B. A a. Aft Air. Wet. d X s. s. 8. 8. s. h. m. s. Rev. m. s. Rev. Inches. • • 35 c Mars . . . S.F. 29.5 42.8 56.0 9.3 22.2 5 31 55.96 +1.23 28.163 71.4 56.8 36 Bi-ai-1 ... 523 45.8 59.0 12.0 38.5 5 36 12.18 13.15 —4 16.22 —11.92 Thcr. att. 37 Mars . . . N.P. 8.3 21.6 34.5 48.2 1.0 5 38 34.72 2.25 69°. 5 as Busse! ... 523 06.0 39.5 52.5 6.0 18.8 5 42 52.56 13.13 4 17.84 10.88 Bar. rt-il. to 32° F. 28.052 39 Mars . . . S.F. 48.3 1.5 14.5 28. S 41.0 5 48 14.70 1.39 40 11. --^.-1 ... 523 6.0 19.0 45.5 58.0 5 52 32.14 13.27 4 17.44 11.88 41 c Mars . . N.P. 57.2 10.2 23.3 37.0 49.7 5 54 23.48 2.52 & II. >:•••] ... 523 15.8 38.8 42.0 55.5 8.5 5 58 42.12 13.66 4 18.64 11.14 43 Mars . . . S.F. 11.0 24.5 37.8 51.0 3.7 6 0 37.60 1.53 44 liirssi'l ... 523 29.0 42.3 55.3 9.0 21.5 6 4 55.40 13.55 4 17.80 12.02 45 Mar« . . . N.P. 5.5 18.5 31.8 45.3 58.0 6 6 31.82 2.56 46 llcssi'l ... 533 24.5 37.8 51.0 4.5 17.2 6 10 51 .00 13.53 4 19.18 10.97 47 Mars . . . S.F. 48.0 1.5 14.5 37.8 40.5 6 13 14.46 1.55 48 Bessel ... 523 6.4 19.5 32.5 46.0 58.5 6 17 32.58 13.54 4 18.13 11.99 49 Mars . . .N.P. 10.3 23.5 36.5 50.2 3.0 6 19 36.70 2.63 :,» Besscl ... 523 30.3 43.5 56.5 10.0 22.5 6 23 56.56 13.62 4 19.86 10.99 51 d Mars . . . S.F. 12.5 25.5 38.5 53.0 4.6 6 25 38.62 1.61 52 Bcssel ... 523 31.0 44.0 57.0 10.5 23.3 6 29 57.16 13.61 4 18.54 12.00 53d Mars . . . N.P. 33.0 46.0 59.5 12.8 25.5 6 31 59.36 2.62 54 ll.-~.i-l ... 533 53.5 6.5 19.8 33.3 46.0 6 36 19.80 +13.74 —4 20.44 —11.12 Remarks. Observations during Tin- night extremely variable in accuracy or value, owing to frequent changes in atmospheric conditions, a Blazing iind unsteady. c Steady. b Very unsteady. d Good. Results. h. m. i. m. s. Rev. , H Mean N. P. . . Fourteen transits . . 5 7 8.11 — 4 16.183 . . . —10.848 . . . . =331.03 Mean S. F. . . Tiiirteen transits . 5 7 19.31 — 4 15.075 . . . -11.885 . . . =3 51.24 b. m. B. ll. m. s. Correction for chronometer at 5 7 , . . . —31.67 5 6 36 44 Correction tor chronometer at 5 7 . . . —31.67 Santiago Bid. time S. F. 5 6 47 64 11 20 n A P. F. limbs in A. R. reduced to arc . . . 16.63 A N. S. limbs micr. in rev. . 1.037 = 20.21 Variation of A. R. in 111 . . + 0.10 Variation of declination in lit. . . — 0.00 i )l.*cr\ nl 1* F. iliamcter . . 16.73 Corr. for diain. of micr. wires . — 2.20 Observed N. si. diameter . . . . 18.01 h.m. /, h.m. » A p at 5 » . 0.23 A 0 at 5 9 . . 0.25 62 OPPOSITION OF MARS, 1849-50, JANUARY 8, 185O. V V a Chronometer time of transit. Planet— Star. Bar. Thermometers. 1 £ Object. A. B. C. 1). E. A a. At?. Air. Wet. _ 2 s. s. s. s. s. h. in. s. Rev. in. s. Rev. Inches. 0 0 Z 1 l Mars . . . N.P. 50.0 3.2 16.5 29.5 42.5 4 1 16.34 + 1.33 28.151 72.2 56.6 a Bessel ... 523 59.0 12.0 25.0 38.5 52.2 4 6 25.34 15.14 —5 9.00 —13.81 Ther. att 3 Mars . . . S.F. 47.8 1.3 14.5 27.8 40.5 4 9 14.38 0.53 70°. 5 4 Bessel ... 523 55.5 9.2 22.2 36.0 48.5 4 14 22.28 15.48 5 7.90 14.95 Bar. red. to 32° F. 28.039 5 Mars . . . N.P. 46.8 0.0 13.3 26.5 39.2 4 16 13.16 1.81 6 Bessel . . . 523 56.0 9.2 22.5 36.0 48.5 4 21 22.44 15.79 5 9.28 13.98 7 Mars . . . S.F. 52.5 5.5 18.5 32.3 45.0 4 23 18.76 1.04 8 Bessel ... 523 1.0 14.0 27.0 40.0 53.2 4 28 27.04 16.00 5 8.28 14.96 9 Mars . . . N.P. 38.5 52.0 5.0 18.5 32.5 4 31 5.30 2.17 1U Bessjl . . . 523 | . . 2.0 15.2 28.5 41.2 4 36 15.01 16.18 5 9.71 14.01 11 Mars . . . S.F. 23.7 37.2 50.8 3.5 16.2 4 37 50.28 1.17 13 Bessel ... 523 46.3 59.3 12.7 25.5 4 42 59.33 16.18 5 8.05 15.01 13 a Mars . . . N.P. 48.2 1.3 14.5 27.8 40.5 4 45 14.46 2.46 14 Bessel . . . 523 59.0 12.2 25.2 38.8 51.5 4 50 25.34 16.42 5 10.88 13.96 15 Mars . . . S.F. 53.7 6.8 20.0 33.4 46.3 4 52 20.04 1.73 16 Bessel ... 523 3.0 16.5 29.5 43.0 55.8 4 57 29.56 16.80 5 9.52 15.07 17 Mars . . . N.P. 50.6 3.5 16.5 30.3 42.8 5 0 16.72 2.26 18 Bessel ... 523 14.5 27.5 40.0 53.5 5 5 27.26 16.43 5 10.54 14.17 19 Mars . . . S.F. 10.0 23.2 36.5 49.8 2.5 5 7 36.40 1.74 20 Bessel ... 523 19.8 33.2 46.2 59.7 12.5 5 12 46.28 16.80 5 9.88 15.06 21 Mars . . NP. 24.5 37.7 51.3 4.3 17.0 5 14 50.96 1.51 22 Bessel ... 523 35.8 49.0 2.2 15.8 28.5 5 20 2.26 15.55 5 11.30 14.04 23 Mars . . . S.F. 37.5 50.5 4.0 17.5 30.2 5 23 3.94 0.39 24 Bessel ... 523 49.3 2.5 16.0 29.5 42.2 5 28 15.90 15.60 5 11.96 15.21 25 Mars . . . N.P. 36.2 49.4 2.5 15.8 28.5 5 31 2.48 1.53 26 Bessel ... 523 48.5 2.0 15.0 28.5 41.2 & 36 15.04 15.74 5 J2.56 14.21 97 Mars . . . S.F. 31.0 44.5 57.5 10.9 23.5 5 37 57.48 0.61 28 Bessel . . . 523 42.7 56.0 9.0 22.5 35.2 5 43 9.08 15.82 5 11.60 15.21 29 Mars . . . N.P. 36.0 4i>.3 2.5 15.8 28.4 5 45 2.40 1.72 30 Bessel . . . 523 2.0 16.0 29.5 42.3 5 50 15.83 15.75 5 13.43 14.03 311 Mars . . . S.F. 34.5 47.5 1.0 14.2 27.0 5 52 0.84 0.68 32 Bessel ... 523 46.8 0.0 13.3 26.5 39.5 5 57 J3.22 15.8-2 5 12.38 15.14 33c Mara . . . N.P. 25.5 39.5 59.5 5.5 18.5 6 6 52.30 1.78 34 Bessel . . . 523 4U.5 53.2 6.5 20.2 33.0 6 12 6.68 15.94 5 14.38 14.16 35 Mara . . . S F. 4.5 17.8 30.8 44.2 57.0 6 14 30.36 0.76 36 Bessel ... 523 , 17.5 31.0 44.2 57.5 10.2 6 19 44.08 15.90 5 13.22 15.14 37 Mars . . . N.P. 8.3 21.3 34.8 48.3 1.2 6 21 34.78 1.72 38 Bessel ... 523 23.5 36.5 49.8 3.0 16.0 6 26 49.76 16.00 5 14.98 14.28 39 Mars . . . S.F. 13.0 26.2 39.5 52.5 5.3 6 28 U9.30 0.63 40 Bessel . . . 523 27.0 40.2 53.2 6.5 19.5 6 33 53.28 + 15.89 —5 13.98 —15.26 Remarks. The definition being ordinarily good, and motion of the planet steady, this may be regarded a very fair night for observations. The star cannot exceed the 10th magnitude. a Good measures. *> Blitzing and very unsteady. c Recorded 10.0s. at wire K. AT SANTIAGO DE CHILE. JANUARY 8, 1830— Continued. Results. 53 h. m. s. m. R. Rev. / // Mean N. P. . . Ten transits ..59 20.89 — 5 11.606 .... —14.065 . . . =4 34.13 Mean 3. F. . . Ten tran.-ils . . 5 16 S9.23 — 5 10.677 .... —15.101 . . . =454.32 h. m. s. h. m. s. c f 1 n ipter at 5 9 34 . 58 5 8 46.31 on 5 17 . . —34.60 5 16 4.63 7 18.32 ii ii A P. P. limbs ii I A. R. reduced to arc . . . 13.93 A N. S. limbs micr. in rev. . 1.036 = 20.19 Variation of A. R. in 7m. 18s. . . . . . . + 4.09 Variation of declination in 7m. 18c. — 0.35 Observed P. F. dkimrter .... . . . 18.02 Corr. for diam. of micr. wires . . — 2.20 Observed N. S. diameter ... 17.64 h. m. n h. m. ii A a at 5 11 . 0.30 A pat 5 19 . 0.32 JANUARY 9, 1850. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ad. Air. Wet. s. s. S. 8. 8. b. m. s. Rev. m. s. Rev. Inches. « • 1 Mars . . . N.P. 41.2 54.2 7.5 21.0 33.7 3 32 7.52 + 0.54 28.096 71.3 53.8 2 3 4 llr.-rl . . . 523 Mars . . S.F. lifsscl ... 523 41.2 47.5 46.5 54.2 1.0 59.7 7.6 14.5 13.0 21.2 27.5 26.0 34.0 40.2 39.0 3 38 7.64 3 42 14.14 3 48 12.84 17.66 0.62 18.74 —6 0.12 5 58.70 —17.12 18.12 Ther. att. 72°. 0 Bar. red. to 32° F. 27.978 5 Mars . . . N.P. 10.0 23.0 36.2 49.5 2.2 3 52 36.18 1.84 6 Bessel ... 523 10.2 23.5 36.5 50.0 2.8 3 58 36.60 19.02 6 0.42 17.18 7 Mars . . . S.F. 49.5 2.5 16.0 28.8 4 2 2.59 1.40 8 liessel . . 523 49.2 2.2 15.7 28.2 4 8 2.21 19.55 559.62 18.15 9 Mars . . , N.P. 11.5 25.0 38.2 51.3 4.0 4 11 38.00 2.97 10 Bessel . . . 523 12.5 26.0 39.0 52.5 5.2 4 17 39.04 20.17 6 1.04 17.20 11 Mars . . . S.F. 33.0 46.3 59.5 12.8 25.5 4 21 59.42 0.83 12 Bessel ... 523 33.5 47.0 0.0 13.5 26.2 4 28 0.04 19.09 6 0.62 18.16 13 Mars . . . N.P. 15.5 28.8 42.0 55.3 8.0 4 42 41.92 1.18 14 . . .523 17.5 31.0 44.0 57.5 10.2 4 48 44.04 18.51 6 2.12 17.32 15 Mars . . . S.F. 30.2 43.5 56.5 10.0 22.6 4 50 56.56 0.40 16 Bessel ... 523 31.5 44.7 58.0 11.5 24.0 4 56 57.94 18.68 6 1.38 18.28 17a Mars . . . N.P. 27.2 40.5 53.5 7.0 19.8 4 58 53.60 1.58 18 Hessel ... 523 30.5 43.5 56.5 9.8 22.8 4 4 56.62 18.92 6 3.02 17.34 19 Marx . . . S.F. 16.8 30.0 43.0 56.5 9.2 5 743.10 0.90 20 ... 523 18.7 32.0 45.0 58.5 11.2 5 13 45.08 19.23 6 1.98 18.33 21 Mara . . . N.P. 30.0 43.5 56.5 10.0 22 5 5 15 56.50 1.11 22 Bessel ... 523 33.5 46.6 59.7 13.3 26.0 5 21 59.82 18.43 6 3.32 17.32 a Mars . . . S.F. 42.3 55.5 8.5 22.8 34.5 5 24 8.72 1.31 24 Bessel . . 523 45.0 58,3 11.2 24.8 37.5 5 30 11.36 19.73 6 2.64 18.42 Mars . . . N.P. 7.8 21.2 34.3 47.7 0.5 5 32 34.30 2.70 36 Bessel . . . 523 11.7 25.0 38.2 51.7 4.5 5 38 38.22 20.07 6 3.92 17.37 27 Mars . . . tf.F. 10.5 •23.8 37.0 50.5 3.0 5 40 36.96 1.00 K It.'ssH ... 523 12.8 26.0 39.4 53.0 5.8 5 46 39.40 19.46 6 2.44 18.46 •29 Mar< . . . N.P. 18.0 31.5 44.5 58.0 10.5 5 49 44.50 2.46 30 ItrsM'l ... 523 22.6 36.0 49.0 2.5 15.2 5 55 49.06 +19.87 1 —6 4.56 — 17.41 54 OPPOSITION OF MARS, 1849-50, JANUARY 9, 1850— Continued. £ Chronometer time of transit. Planet— Star. Thermometers. £ VTpi ofw're- Micr Bar. £ tH g Object. A. B. C. D. E. A a A,!. Air. Wet. 1 0 s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. ° ' IE 31 Mars . . . S.F. 53.2 6.5 19.6 33.0 45.8 5 58 19.62 1-1.57 28.096 71.3 53.8 » Vessel . . . 523 57.5 11.0 24.2 37.5 50.3 6 4 24.10 19.90 —6 4.48 —18.33 Tlier. att. 336 Mars . . . N.P. 15.5 28.8 42.0 55.5 8.2 6 6 42.00 0.81 72°. 0 34 Bessel . . . 5-23 21.5 35.0 48.0 1.5 14.2 6 12 48.04 18.25 6 6.04 17.44 Bar. red. to 32° F. 27.978 35 Mars . . . S.F. 39.3 52.5 6.0 19.2 32.0 6 15 5.80 1.43 36 Bessel ... 533 43.7 56.5 10.7 24.0 36.8 6 21 10.34 19.82 6 4.54 18.39 37 Mars . . . N.P. 43.5 57.0 10.5 24.0 36.8 6 23 10.36 1.33 38 Bessel . . . 523 51.0 4.4 17.3 30.6 43.3 6 29 17.30 18.86 6 6.94 17.53 39 Mars . . . S.F. 51.2 4.5 17.5 31.0 43.6 6 31 17.56 0.30 40 Bessel . . 523 56.5 9.5 23.0 36.5 49.2 6 37 22.94 + 18.80 —6 5.38 —18.50 Remarks. Night very fair for observations almost throughout. The opinion lirst formed respecting the magnitude of the comparing star is unchanged. a Badly defined and unsteady. b Excellent. Results. Mean N. P. . . Mean S. F. . . Ten transits . . . Ten transits . h. m. s. . 5 2 36.49 5 11 26.45 m. s. Rev. — 6 3.150 .... —17.323 . . — 6 3.178 .... 18.314 . . . . =5 37.62 . . =5 56.93 Correction for chrc Correction for clin A P. F. limbs in A Variation of A. R. Observed P. F. dia h. m. mometer at 5 3 . . jnometer at 5 11 . . . R. reduced to arc . in 8m. 50s. ... s. , . —37.47 . . — 37.49 , . 14.58 . + 4.60 b. m. s. 5 1 59.02 Santiago sid. time S. F . . 5 10 48.96 . . 8 49.94 A N. S. limbs mic. in rev Variation of declination in 8m. 50s. . Corr. for diam. of micr. wires . . Observed N. S. diameter .... . 0.991=19.31 — 0.40 — 2.20 16.71 h. m. A o at 5 5 . . . 0.36 h. m. A » at 5 14 ft . 0.38 JANUARY 10, 1850. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. R. C. D. E. An. AS. Air. Wet. a. s. s. s. •i h. m. s. Rev. m. s. Rev. Inches. ' • 1 B. -,<,:! ... 396 41.2 54.5 7.5 21.0 33.7 3 55 7.58 —12.49 28.140 70.5 53.9 2 Mars . . . N.P. 35.2 48.8 1.8 15.3 28.0 4 3 1.82 0.48 +7 54. 24 + 12.01 3 4 5 Bessel ... 396 Mars . . . S.F. Bessel ... 396 40.6 35.7 22.0 53.7 49.2 35.2 7.0 2.0 48.3 20.2 15.5 1.6 33.0 28.2 14.5 4 8 G.88 4 16 2.12 4 17 48.32 12.84 1.83 12.97 7 55.24 11.01 Thor. att. 71M Bar. red. to 32° F. 28.024 6 Mars . . . N.P. 15.2 28.2 41.3 54.7 7.2 4 25 41.32 0.87 7 53.00 12.10 7 Hesse! ... 390 53.0 6.2 19.3 32.8 45.2 4 27 19.30 12.69 8 Mars . . . S.F. 46.5 0.0 13.2 26.5 39 2 4 35 13.08 —1.69 +7 53.78 11.0(1 AT SANTIAGO DE CHILE. 55 JANUARY 1O, 1 v-.n < Minimi* .1. No. for reference. uhjcct. Chroiininrtt-r linn1 of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A& Air. Wet s. 8. B. s. s. tl. 111. S. Rev. 111. S. Rev. Inches. • • 9a flessel . . . 39S 36.5 49.7 3.0 16.3 29.0 4 37 2.88 —12.42 28.140 70.5 53.9 10 Mars . . . N.P. 28.8 41.8 55.1 8.2 31.0 4 44 54.98 0.44 +7 52.10 +11.98 11 13 13 Besscl ... 396 Mare . . . S.F. BMW 1 ... 396 45.0 37.8 2.0 57.8 51.2 15.2 11.2 4.4 28.5 24.5 17.6 41.5 37.3 30.3 54.3 4 47 11.14 4 55 4.26 4 58 28.30 12.16 1.19 11.92 753.12 10.97 Tlier. att. 71°. 1 Bar. red. to 32° F. 28.024 146 Mars . . . N.P. 53.5 6.5 19.5 33.0 45.9 5 6 19.60 ±0.00 7 51.30 11.92 15 Bcssel ... 396 17.0 29.3 42.5 56.0 8.7 5 9 42.68 —6.83 16 b Mars . . . S.F. 8.3 31.5 34.7 48.0 0.8 5 17 34.66 +4.12 7 51 .98 10.95 17 Besscl ... 396 59.0 12.2 25.5 38.8 11.5 5 19 25.40 —6.63 18 c Mars . . . N.P. 5(1.5 4.0 17.2 30.5 43.2 5 37 17.08 +5.26 7 51.68 11.89 19 Ilcsscl ... 396 45.0 58.2 11.2 34.8 37.5 5 39 11.34 —6.16 30 Mara . . . S.F. 36.3 49.8 3.0 16.5 29.2 5 37 2.94 +4.81 7 51.60 10.97 •21 Rcsscl ... 396 19.0 32.5 45.3 S8.5 n.r> 5 38 45.36 —5.96 tat Mars . . . N.P. 9.5 22.5 35.5 48.9 1.5 5 46 35.58 +5.93 7 50.22 11.89 S3 Besscl ... 396 13.4 26.6 39.7 53.0 5.8 5 48 39.70 —5.72 24 Mars . . . S.F. 5.1 18.4 31.5 44.7 57.5 5 56 31.44 +5.19 7 51.74 10.91 25 ... 396 24.2 37.6 50.8 4.2 17.0 5 58 50.76 —5.45 36 Mars . . . N.P. 14.5 27.5 40.5 53.8 6.5 6 6 40.56 +6.40 7 49.80 11.85 •27 Besscl ... 396 13.0 26.3 39.5 52.8 5.5 6 8 39.40 —5.39 28 Mars . . . S.F. 3.5 17.0 30.2 43.5 56.3 6 16 30.08 +5.54 7 50.68 10.93 29 Besscl ... 396 54.3 7.5 30.6 34.0 46.8 6 18 20.64 —5.28 30 e Mars . . . N.P. 9.5 23.0 36.2 6 26 9.72 +6.70 7 49.08 11.98 31 Besscl ... 396 40.0 53.2 6.5 19.8 32.5 6 29 6.40 —5.22 33 Mars . . . S.F. 30.3 43.5 56.5 9.5 32.5 6 36 56.44 +5.56 7 50.04 10.78 33 llc'.ss.'l ... 396 9.2 22.5 35.7 49.0 1.8 6 39 35.64 —4.91 34/ Mars . . . N.P. 57.0 10.3 23.3 36 5 49.3 6 47 23.26 +6.89 7 47.62 11.80 Bcsscl ... 396 8.5 31.7 35.0 48.2 1.0 6 49 34.88 —4.95 36 /' Mars . . . S.F. 58.0 11.3 34.5 37.8 50.5 6 57 24.40 +5.90 +7 49. 62 +10.85 Remarks. A In i»ht. clear ni^lit, which renders all objects wonderfully distinct ; but a cold SB. wind succeeding a warm day, creates currents in the air, and renders their images somewhat unsteady. Altogether, the night is a very fair one. The star is fully of the assigned magnitude. a Excellent. rf Tolerab'y steady. li Very unsteady. r. Indifferent. c Blazing. / Good. Result*. h. m. s. in. s. Rev. / a Mean N. P. . . Nine transits . . Mean S. F. . . Nine transits . . 526 1.55 . 5 36 28.82 + 7 51.004 . . . + 11.935 . . + 7 51.978 . . . +10.930 . . . . =3 52.61 . . = 3 33 03 li. in. Correction for chronometer at 5 26 . s. . . —40.38 Santiago sid. time N P. h. m. s. 5 35 21 17 Correction for chronometer at 5 36 . . . —40.39 Santi.-ti:" siil. time S. F 1 tili'i v al . . . . . 5 35 48.43 . . 10 27 26 A P. F. limits in A. R. reduced to arc . . . 14.61 A N. S. limits micr. in rev . 1.005 = 19.59 Vaiiatiim of A. R in 10m. 27s. . . . observed I'. F. diameter . . + 4.95 . . 19.56 Variation ol declination in lOi/i. 27v. Corr. for diam. ill' micr. wires . . — 0.47 - 2.20 observed N.S. diameter . . . . 16.92 h. in. A o at i 21 (I.-.M h. in. A o at .'i :u . 0.24 56 OPPOSITION OF MARS, 1849-50, JANUARY 11, 1850. V V Chronometer time of transit. Planet— Star. Thermometers. s . _.. Bar 1 Object. A. B. C. D. E. A a. A (5. Air. Wet. w c s. - s. s. s. h. m. s. Rev. m. s. Rev. Inches. • • 1 Bessel ... 396 48.8 2.5 15.8 28.3 41.2 3 48 15.32 —3.21 28.150 73.4 58.8 3 Mars . . . N.P. 58.8 11.8 24.8 38.2 50.8 3 55 24.88 +5.56 +7 9.56 +8.77 Thcr. alt. 3 Bessel ... 396 50.3 3.3 16.5 29.8 42.5 4 0 16.58 —4.14 72°. 8 4 Mars . . S.F. 0.5 13.5 26.5 40.0 52.8 4 7 26.66 +3.58 7 10.08 7.72 Bar. red. to 33° F. I 28.029 5 Bessel ... 396 28.0 41.3 54.3 7.8 20.5 4 11 54.38 —3.66 6 Mars . . . N.P. 37.0 50.0 3.2 16.5 29.2 4 19 3.18 +5.07 7 8.80 8.73 7 Bessel ... 396 37.3 50.7 3.8 17.2 29.9 4 21 3.98 —3.54 8 Mars . . . S.F. 0.6 13.5 27.0 39.5 4 28 13.54 +4.35 7 9.56 7.89 9 Bessel ... 396 56.5 10.0 23.0 36.5 49.2 4 30 22.84 —3.43 10 Mars . . . N.P. 5.3 18.5 31.5 44.8 57.5 4 37 31.52 +5.22 7 8.68 8.65 11 Bessel ... 396 54.5 7.5 20.8 34.0 46.8 4 39 20.72 —3.19 12 Mars . . . S.F. 3.5 16.5 29.5 43.0 55.7 4 46 29.64 +4.59 7 8.92 7.78 13 Bessel ... 396 28.5 41.5 54.7 8.0 20.8 4 48 54.70 —3.04 14 Mars . . . N.P. 36.2 49.2 2.4 15.8 28.5 4 56 2.42 +5.69 7 7.72 8.73 15 Bessel ... 396 25.5 39.0 52.2 5.5 18.2 4 58 52.08 —2.73 16 Mars . . . S.F. 33.5 47.0 0.2 13.5 26.2 5 6 0.08 +4.93 7 8.00 7.65 17 Bessel ... 396 18.5 32.0 45.0 58.0 11.2 5 7 45.14 —3.44 18 Mars . . , N.P. 25.8 39.0 52.0 5.2 18.0 5 14 52.00 +6.16 7 6.86 8.60 19 Bessel ... 396 17.5 30.7 43.8 57.0 9.8 5 16 43.76 —4.07 20 Mars . . . S.F. 24.5 38.0 51.2 4.2 17.0 5 23 51.18 +3.63 7 7.32 7.70 21 Bessel ... 396 7.5 20.5 33.6 47.0 59.8 5 26 33.68 —4.09 23 Mars . . . N.P. 14.3 27.5 40.5 54.0 6.8 5 33 40.60 +4.58 7 6.92 8.67 33 Bessel ... 396 58.0 11.2 24.5 37.8 50.5 5 35 24.40 —3.60 24 a Mars . . . S.F. 5.5 18.8 32.3 45.5 58.2 5 42 32.06 +4.03 7 7.66 7.63 25 Bessel ... 396 26.8 40.2 53.5 7.0 19.8 5 45 53.46 —3.43 26 Mars . . . N.P. 32.7 46.0 59.0 12.5 25.0 5 52 59.04 +5.15 7 5.58 8.57 27 Bessel ... 396 10.5 23.8 37.0 50.4 3.2 5 C4 36.98 —3.32 28 Mars . . . S.F. 17.2 30.5 43 5 57.0 9.5 6 1 43.54 +4.26 7 6.56 7.58 29 Bessel ... 396 41.8 54.8 8.0 21.5 34.2 6 3 8.06 —3.23 30 Mars . . . N.P. 47.0 0.3 13.3 26.7 39.5 6 10 13.36 +5.33 7 5.30 8.56 31 Bessel . . 396 14.0 27.0 40.3 53.8 6.5 6 11 40.32 —2.74 32 Mars . . . S.F. 20.5 33.8 47.0 0.5 13.2 6 18 47.00 +4.89 7 6.68 7.63 33 Bessel ... 396 52.0 5.2 18.5 31.5 44.5 6 20 18.34 —3.06 346 Mars . . . N.P. 56.3 9.5 22.5 36.0 48.8 6 27 22.63 +5.40 7 3.28 8.46 35 Bessel ... 396 40.7 54.0 7.2 20.5 33.4 639 7.16 —3.05 36 c Mars . . . S.F. 47.0 0.0 13.2 26.3 39.5 6 36 13.20 +4.45 +7 6.04 +7.50 1 Remarks. Light, hazy cirri over most of the northern and northeastern portion of the eky during nearly all the period of observation. The effect was to cut off the flaring light so often mentioned in these measures, and to permit greater certainty in the contacts. a Blazing. b III defined and unsteady. c Unsteady. Results. h. m. s. m. s. Rev. , // Mean N.P. . . Nine transits . . . . 5 14 7.74 + 7 6.967 . . . + 8.638 . . . . =248.35 Mean H. F. . . Nine transits . . . . 5 23 28.55 + 7 7.869 . . . +7.675 . . . . =2 29.58 AT SANTIAGO DE CHILE. 57 JANUARY II, 1850-Coiitlnued. Eesults — Continued. 1). 111. 8. h. m. a. Correction for chronometer at 5 14 . —44.33 5 13 23.41 Correction tor L>liruiioin''ti'r at 5 23 . . —44.33 5 22 44 »2 Inteival . 9 20 81 II ii A P. F. tirnlis in A. R. reduced to arc . . 13.53 A N. 3. limbs micr. in rev. . . . . 0.963 = 18.77 Variation oi' A. R. in 9m. 21». . . + 4.15 Variation of declination in 9m. 21s. . — 0.42 Observed P. F. diameter . . 17.68 Corr. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 16.15 h. m. 11 h. m. // A o at 5 10 . 0.18 A o at 5 IS . 0.16 JANUARY 13, 1850. No. for reference. Object. Chronometer time of transit. Mean of wires. Mic, Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ai. Air. Wet. s. 8. 8. s. E. h. m. s. Rev. n,.s. Rev. Inches. • • 1 Bcsscl . . . 396 23.7 37.0 50.3 3.5 16.2 3 38 50.14 +1.65 28.066 74.5 59.2 2 Mars . . . N.P. 53.0 6.4 19.5 32.5 45.3 3 45 19.34 6.98 +6 29.20 +5.33 3 4 5 llrs<,-l ... 396 Mars . . . S.F. Bessel ... 396 22.5 52.5 37.0 35.5 5.5 49.8 48.6 18.5 3.0 2.3 32.0 16.5 15.0 44.7 29.2 3 48 48.76 3 55 18.64 3 58 3.10 1.60 6.11 2.19 6 39.88 4.51 Ther. att. 73°. 5 Bar. red. to 32° F. 27.943 6 Mars . . . N.P. 5.2 18.5 31.5 45.0 57.3 4 4 31.50 7.57 6 28.40 5.38 7 . . .396 13.6 27.5 41.0 54.5 7.2 4 8 40.76 0.38 8 Mars . . . S.F. 43.6 57.0 10.2 23.5 36.2 4 15-10.10 4.83 6 29.34 4.45 9 Bi'ssol ... 396 55.0 8.5 21.6 35.0 47.7 4 18 21.56 1.38 10 Mars . . . N.P. 36.0 49.3 3.5 15.8 4 24 49.29 6.72 6 27.73 5.44 11 Bessel ... 396 18.1 31.1 44.5 58.0 10.5 4 26 44.44 0.37 12 Mars . . . S.F. 47.0 0.2 13.3 26.8 39.5 4 33 13.36 4.83 6 28.82 4.46 13 Bessel ... 396 22.3 35.5 48.8 2.0 15.0 4 34 48.74 O.S6 14 Mars . . . N P. 49.5 3.7 16.0 29.3 42.0 4 41 15.90 5.76 6 27.16 5.40 15 Bessel ... 396 95.5 38.8 52.0 5.3 18.0 4 42 51.93 0.44 16 Mars . . . S.F. 53.8 7.0 20.3 33.5 46.2 4 49 30.16 4.82 6 28.24 4.38 17 Rfssc-1 . . 396 36.2 49.5 2.5 16.0 38.8 4 51 2.60 0.68 18 Mars . . . N.P. 3.0 16.2 29.8 42.8 55.5 4 57 39.46 6.03 6 26.86 5.35 19 Bessel ... 396 40.8 54.3 7.6 21.2 33.8 5 0 7.54 0.95 20 Mare . . . S.F. 8.5 21.5 35.3 48.8 1.8 5 6 35.12 5.31 6 27.58 4.36 21 Bessel ... 396 48.8 2.0 15.2 98.5 41.2 5 8 15.14 1.12 B Mars . . . N.P. 15.3 28.5 41.5 55.0 7.5 5 14 41.56 6.40 6 96.42 5.98 23 Bessel . . 396 52.8 6.0 19.2 32.5 45.3 5 16 19.16 1.26 34 Mars . . . S.F. 19.3 32.3 45.7 59.2 11.8 5 22 45.64 5.59 6 26.48 4.33 25 Bessel ... 396 0.5 13.5 27.0 40.5 53.2 5 24 25.94 1.39 26 Mars . . . N.P. H.fl 39.5 52.9 6.1 18.9 5 30 52.78 6.64 6 25.84 5.95 27 He>sH ... 396 5.7 19.0 32.2 45.5 58.2 5 32 32.12 1.50 28 Mars . . . S.F. 32.3 45.8 12.5 35.2 5 36 58.98 5.81 626.86 4.31 29 Bessel ... 396 0.5 13.5 27.0 40.2 53.0 5 39 36.84 1.57 30 Mara . . . N.P. 96.0 39.2 52.3 5.5 18.2 5 46 52.24 6.92 6 25.40 5.35 31 Bessel ... 396 26.3 39.5 52.5 6.0 18.5 5 56 52.56 1.73 32 Mars . . . S.F. 52.0 5.5 18.8 32.2 45.0 6 3 18.70 6.00 6 26.14 4.27 33 Bessel ... 396 21.3 34.0 47.5 1.2 14.0 6 4 47.60 1.74 34 Mars . . . N.P. 46.2 59.5 12.5 95.8 38.5 6 11 12.50 +6.93 +6 24.90 +5.19 58 OPPOSITION OF MABS, 1849-50, JANUARY 13, 1850— Continued. V Chronometer time of tiansit. Planet— Star. Thermometers. M f ' Micr. Bar. E Object. A. B. C. D. E. A a. A a. Air. Wet. 6 s. s. s. s. s. h. m. s. Rev. m. 8. Rev. Inches. • 35 Bessel ... 396 39.3 52.3 5.5 19.0 31.7 6 13 5.54 + 1.81 28.066 74.5 59.2 36 Mars . . . S.F. 5.0 18.3 31.5 44.8 57.5 6 19 31.43 6.13 +6 25.88 +4.32 Ther. att 37 38 Bessel .... 396 Mars . . . N.P. 39.0 3.5 52.5 16.5 5.2 29.5 19.0 43.2 31.8 56.0 6 21 5.50 6 27 29.74 1.77 6.95 6 24.24 5.18 73". 5 Bar. red. to 32° F 27.943 39 Bessel ... 396 41.6 55.0 8.0 21.5 34.2 6 39 8.06 1.74 40 Mars . . . S.F. 7.0 30.2 33.3 46.8 59.5 6 35 33.36 +5.95 +6 25.30 +4.21 Remarks. Somewhat hazy, but favorable to clear, sharp outlines of figures and apparent steadiness of motion. The measures are generally very good. Mean \. P. . . . Ten transits . . Mean 8. F. . . . Ten transits . h. m. Results. h. m. B. . 5 6 27.43 . 5 15 58.55 s. 46 60 m. s. Rev. + 6 26.615 .... +5.315 . + 6 27.452 .... +4.360 . / it ... =1 43.58 . . . =124.98 h. in. s. ... 5 5 40.83 46 62 . . . 5 15 11.93 ... 9 31.10 it ii 0.955 — 18.61 , . . + 3.85 Variation of declination in 9m. 31j. . . — 0.43 Observed P. F. diameter .... h. m. A a at 5 2 . . . 16.40 // . 0.11 Corr. for diam. of mier. wires . Observed N. S. diameter . . h. m. A (> at 5 12 . . — 2.20 . . 15.98 . 0.09 JANUARY 13, 1850. « G c Chronometer time of transit. Micr Planet— Star. Bar. Thermometers. <£ £ y Object. A. B. C. D. E. A a. Ai. Air. Wet. «£ 1 8. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. • • 1 Bessel ... 396 54.3 7.5 20.5 34.0 47.0 34420.66 +1.59 27.976 77.3 61.5 3 Mars . . . N.P. 45.8 59.0 12.3 25.2 38.0 3 50 12.06 3,83 +5 51.40 +2.24 1'her. att. 3 Bessel ... 396 49.0 2.0 15.5 29.0 42.0 3 53 15.50 1.85 73°.7 4 Mars . . . S.F. 41.5 55.0 8.0 21.5 34.3 3 59 8.06 2.95 5 52.56 1.10 Bnr. red. to 32° F. 27.849 5 Bessel . . 396 3.5 16.5 39.5 43.5 56.5 4 1 29.90 2.13 | 6 Mars . . . N.P. 8.0 31.3 34.5 47.3 4 7 21.12 4.35 5 51.22 2.22 7 Bessel ... 396 0.5 13.5 27.0 39.8 4 15 13.59 2.92 8 Mars . . .S.F. 39.0 52.2 5.3 18.6 3.3 4 21 5.68 4.02 5 52.09 1.10 9 Bessel ... 396 17.0 30.3 43.5 57.0 9.8 4 22 43.52 2.95 10 Mars . . . N.P 7.5 21.0 34.2 47.5 0.2 4 28 34.08 5.08 5 50.56 2.13 11 Bessel ... 396 0.5 14.0 27.0 40.5 53.2 4 30 27.04 3.11 12 a Mars . . . S.F. 52.2 5.3 18. S 31.8 44.5 4 36 18.46 4.19 5 51.42 1.08 1] ll.'ssi.l ... 396 57.0 10.3 23.3 36.8 49.5 4 38 93.88 '. 0.50 14 Main ... N.P 47.0 0.2 13.4 26.6 39.5 4 44 13.32 ; +2.62 +5 49.94 +S.12 AT SANTIAGO DE CHILE. 59 JANUARY 13, 1850— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. rhermometers. A. 13. C. D. E. A a. Ad. Air. Wet. 8. 8. s. 6. e. b. m. s. Rev. m. s. Rev. Inches. | • 15 16 Bi'.-si'l ... 396 Mara . . . S.F. 26.3 17.0 39.5 30.3 52.7 43.5 6.0 56.9 18.7 9.6 4 45 52.64 4 51 43.46 +0.43 1.52 +5 50.82 +1.09 27.976 77.3 61.5 17 184 19 Bessel ... 396 Mars . . . N.P. Besstl ... 396 56.3 45.0 52.0 9.2 58.1 5.0 22.5 11.2 18.3 35.7 24.5 31.5 48.3 37.3 44.2 4 53 22.40 4 59 11.22 5 1 18.20 0.46 2.62 0.87 5 48.82 2.16 Ther. att. 73°. 7 Bar. red. to32°F. 27.849 20 Mars . . . N.P. 42.5 55.5 8.5 22.0 34.8 5 7 8.66 1.87 5 50.46 1.00 21 Bessel ... 396 25.3 38.8 51.8 5.0 17.8 5 8 51.74 0.93 25 Mars . . . N.P. 14.2 27.5 40.5 53.8 6.5 5 14 40.50 2.95 5 48.76 2.02 23 Bessel ... 396 58.2 12.0 25.0 38.4 51.2 5 17 24.96 1.05 34 Mara . . . 8. P. 48.6 2.0 15.2 28.5 41.2 5 23 15.10 2.11 5 50.14 1.06 25 Bessel ... 396 16.8 30.2 43.3 56.8 9.5 5 24 43.32 1.28 26c Mare . . . N.P. 6.0 19.3 32.5 45.5 58.5 5 30 32.36 3.32 5 49.04 2.04 27 Bessel ... 396 44.5 57.7 11.0 24.5 37.0 5 32 10.94 1.31 28 Mars . . . S.F. 34.0 47.5 1.0 14.2 26.8 5 38 0.75 2.36 5 49.81 1.05 29 Bessel ... 396 9.5 22.8 36.0 49.5 2.3 5 39 36.02 1.60 30 Mars . . . N.P. 58.5 11.6 24.7 38.0 50.7 5 45 24.70 3.58 5 48.68 1.98 31 Bessel . . 396 27.0 40.5 53.5 6.9 19.7 5 46 53.52 1.52 32 Man . . . S.F. 16.5 29.7 42.7 56.0 8.8 5 52 42.74 2.48 5 49.22 0.96 33 Bessel ... 396 0.5 13.7 27.0 40.3 53.0 5 54 26.90 1.55 34 Mars . . . N.P. 48.5 1.5 15.0 28.0 41.0 6 0 14.80 3.53 5 47.90 1.98 35 Bessel ... 396 30.3 43.5 56.6 10.0 22.8 6 1 56.64 1.73 36 Mars . . . S.F. 19.2 31.4 44.7 58.2 11.0 6 7 44.90 +2.71 +5 48.26 +0.98 Remarks. During the first hour, light cirri interposed, rendering the comparing star indistinct. The night was without much atmospheric fluctuation, and measures very generally good. o Clear. * Steady; very good. ': Recorded 27.5s, at wire C. Results. h. m. s. m. s. Rev. / it Mean N. P. . . Nine transit* . . . 4 57 49.35 + 5 49.591 .... +2.099 . . . . =0 40.91 Mean S. P. . . Nine transits . . . 5 6 20.86 + 5 50.531 . . . . + 1.047 . . . . =0 20.41 h. in. s. h. m. s. Correction for chronometer at 4 58 . . . — 49.10 4 57 0.25 Correction for chronometer at 5 6 . . . — 49.11 Santiago sid time S F. . 5 5 31.75 I htcrval ... 8 31.50 ii A P. F. limbs in A. R. reduced to arc . . . 14.10 A N. S. limbs inter, in r^v . 1.052 = 20.50 Variation of A. R. in 8m. 31». . . . . . + 3.14 Variation of declination in 8m. 31s. . • — 0.37 17.24 Corr. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 17.93 h. in. // h. in. » A a at 4 54 . 0 04 A o »t 5 3 . . . . . 0.03 60 OPPOSITION OF MARS, 1849-50, •JANUARY 14, 1850. i Chronometer time of transit. Micr. Planet— Star. Bar. Thermometers. | Object. A. B. C. D. E. A a. Ac!. Air. Wet. a I 6 s s. s. s. s. h. in. s. Rev. m. s. Rev. Inches. 0 0 H 1 ili-Ksd ... 396 7.2 20.5 34.0 47.3 59.8 3 38 33.76 —0.04 28.110 71.0 61.4 3 Mars . . . N.P. 25.3 38.5 51.6 4.9 17.6 3 43 51.58 —1.22 +5 17.82 —1.18 Trier, att 3 Bessel ... 396 38.5 52.0 5.1 18.5 31.2 3 47 5.06 +4.33 72°. 0 4 Mare . . . S.F. 56.8 10.5 23.5 37.0 49.8 3 52 23.52 2.31 5 18.46 3.12 llnr. rfil. tn 32° F. 27.992 5 Bessel ... 396 5.2 18.5 31.5 44.8 57.5 4 9 31.50 4.41 6 Mars . . . N.P. 23.1 35.3 48.5 1.8 14.5 4 14 48.44 3.31 5 16.94 1.10 7 Bessel ... 396 26.3 39.5 52.5 6.0 18.5 . 4 16 52.56 3.55 8 Mars . . . S.F. 44.2 57.7 10.7 24.0 36.8 4 22 10.68 1.44 5 18.12 3.11 9 Bessel ... 396 25.1 38.3 51.3 4.5 17.5 4 23 51.34 3.35 10 Mars . . . N.P. 41.8 54.8 8.0 21.4 34.2 4 29 8.04 2.32 5 16.70 1.13 11 Bessel ... 396 20.0 33.2 46.3 59.6 12.2 4 30 46.26 3.45 12 Mars . , . S.F. 37.8 51.0 4.0 17.3 30.0 4 36 4.02 1.42 5 17.76 2.03 13 Bessel ... 396 21.4 34.5 47.6 1.0 13.7 4 37 47.64 3.64 14 Mars . . N.P. 37.5 51.0 4.2 17.5 30.2 4 43 4.08 2.50 5 16.44 1.14 IS Bessel ... 396 14.0 27.2 40.3 53.5 6.5 4 44 40.30 3.65 16 Mars . . . S.F. 58.5 11.0 23.5 4 49 58.49 1.59 5 18.19 2.06 17 Bessel ... 396 29.5 42.8 56.0 9.2 22.0 4 51 55.90 4.02 18 Mars . . . N.P. 45.5 58.5 11.8 25.2 38.0 4 57 11.80 2.85 5 15.90 1.17 19 Bessel . . . 396 •44.5 57.8 11.0 24.2 36.8 4 59 10.86 4.29 20 Mars . . . S.F. 1.2 14.5 27.5 41.0 53.8 5 4 37.60 3.14 5 16.74 2.05 31 Bessel ... 396 47.1 0.3 13.5 26.8 39.5 5 6 13.44 4.38 S3 Mars . . . N.P. 2.4 15.7 29.0 42.4 55.0 5 11 28.90 3.15 5 15.46 1.23 23 Bessel ... 396 52.1 5.3 18.5 32.0 44.5 5 13 18.48 4.49 24 Mars . . . S.F. 8.5 22.0 35.0 48.5 1.2 5 18 35.04 2.28 5 16.56 2.21 25 Bessel ... 396 58.3 11.8 25.0 38.5 51.2 5 20 24.96 4.76 26 Mars . . . N.P. 40.5 53.5 6.2 5 25 40.22 3.56 5 15.25 1.20 27 Bessel ... 396 6.5 19.6 32.8 46.2 38.8 5 27 32.78 4.85 88 Mars . . . S.F. 22.5 35.8 49.0 2.4 15.1 5 32 48.96 2.68 5 16.18 2.17 29 Bessel ... 396 11.3 24.6 37.7 51.0 3.8 5 34 37.68 4.90 30 a Mars . . . N.P. 26.3 39.6 52.5 5.9 18.7 5 39 52.60 3.58 5 14.92 1.32 31 IJcsscl ... 396 14.8 28.2 41.2 54.5 7.2 5 41 41.18 4.99 32 Mars . . B.F. 30.8 44.0 57.2 10.5 33.3 5 46 57.14 2.67 5 15.96 2.33 33 Bessel ... 396 22.0 35.3 48.5 1.5 14.5 5 48 48.36 5.19 34 Mars . . . N.P. 36.3 50.3 3.2 16.5 29.2 554 3.10 3.86 5 14.74 1.33 35 Hi-i-si-l ... 396 17.6 31.0 44.0 57.3 10.3 5 55 44.04 5.59 36 Mars . . . H.F. 33.5 46.8 0.0 13.5 26.2 6 1 0.00 3.35 5 15.96 3.34 37 Bessel ... 396 27.0 40.2 53.4 6.8 19.5 6 2 53.38 3.17 38 Mars . . . N.P. •11.4 54.8 7.8 21.3 34.0 6 8 7.86 1.94 5 14.48 1.23 39 Btssel ... 396 38.7 52.0 5.2 18.5 31.0 6 11 5.08 3.70 40 Mars . . . S.F. 53.5 7.0 20.3 33.5 46.2 6 16 20.08 1.43 5 15.00 3.27 41 Rcssel ... 396 56.0 9.3 22.5 36.0 48.3 6 18 22.42 4.01 42 Mars . . . N.I'. 9.8 23.3 36.3 49.8 3.5 6 23 36.34 2.70 5 13.92 1.31 43 HITS.'] ... 396 59.0 12.2 25.3 36.6 51.5 6 25 25.32 3.99 44 Mars . . . S.F. 13.7 27.0 40.2 53.5 6.2 6 30 40.12 1.76 5 14.80 2.23 45 l!.-si>l ... 396 2-2.5 35.5 48.7 2.2 15.0 6 32 48. 78 3.45 46 Mars . . N.P 49.5 25 15.8 28.5 6 38 2.22 +2.10 +5 13.44 -1.25 AT SANTIAGO DE CHILE. 61 JANUARY 1*, 1850— Continued. i Chronometer time of transit. Planet— Star. Thermometers. I Object. A. B. 0. D. £. A a. A I. Air. Wet. k 6 s. 8. 8. s. 8. li. m. s. Rev. m. s. Rev. Inches. • • 47 Bessel . . . 396 54.5 7.8 21.0 34,0 47.0 6 40 20.86 +3.83 28.110 71.0 61.4 48 M.-irs . . . S.F. 22.0 35.2 48.8 1.5 6 45 35.27 + 1.66 +5 14.41 —2.17 Remarks. Bright and cloudless, with rapidly cooling ; atmosphere , the planet flaring and unsteady during nearly all the observations. a Good. Results. h. m. s. m. B. Rev. / ./ Mean N. P. . . Twelve transits . . 5 17 24.59 + 5 15.502 . . . —1.216 . . . . =023.70 Mean S. F. . . Twelve transits . . 5 24 45.08 + 5 16.512 . . . —2.165 . . , . =0 42.20 h. m. Correction for chronometer at 5 17 . . . Correction for chronometer at 5 25 . . . A P. F. limbs in A. R. reduced to arc . . 8. . —51.43 . —51.44 15.15 h. m. s. 5 16 33 16 5 23 53 64 7 20 48 A N. S. limbs raicr. in rev . 0.949=18.50 Variation of A. R. in 7m. 20s . +2.42 Variation of declination in 7rn. 20». . — 0.31 Observed P. F. diameter 17.57 Corr. for diam. of micr. wires . — 2.20 Observed N. S. diameter .... 15.99 h. m. A o at 5 14 n 0.03 h. m. A o at 5 21 . 0.04 JAXUARY 15, 185O. CJ 0 Chronometer time of transit. Micr. Planet — Star. Thermometers. £ Object. A. B. C. D. E. A a. A (5. Air. Wet. c Z 8. s. s. 8. 8. h. m. s. Rev. m. s. Rev. Inches. O ' 1 Bessel ... 396 44.2 57.4 10.3 24.0 36.6 4 3 10.50 +6.61 28.091 76.0 62.7 2 Mars . . . N.P. 31.5 44.7 57.7 11.2 24.0 4 7 57.82 2.37 +4 47.33 —4.24 Ther. ntt 3 Bessel ... 396 19.4 32.5 45.5 59.0 11.8 4 11 45.64 6.51 75°. 2 4 Mnrs . . . S.F. 7.4 20.8 33.8 47.13 0.0 4 16 33.92 1.19 4 48.28 5.32 Bar. red. to 32° F. 27.963 5 Hi-sscl ... 396 4.5 17.8 30.8 44.2 57.0 4 18 30.86 6.87 6 Mnrs . . . N.P. 51.0 4.5 17.5 30.8 43.5 4 23 17.46 2.58 4 46.60 4.29 7 ll.'ssH ... 396 35.5 48.5 1.7 15.0 28.0 4 25 1.74 7.11 8 Mars . . . S.F. •2-2.7 36.3 49.3 2.7 15.5 4 29 49.30 1.87 4 47.56 5.24 9 ... 396 4.8 18.0 31.1 44.5 57.3 4 31 31.14 7.33 10 Mars . . . N.P. 51.5 4.7 17.8 31.3 44.1 4 36 17.88 2.92 4 46.74 4.41 11 l!< --'I ... 396 35.5 48.7 1.8 15.3 28.0 4 38 1.86 5.66 12 Mars . . . S.F. 23.0 36.2 49.4 2.6 15.5 4 42 49.34 0.41 4 47.48 5.25 13 Bessel ... 3% 2.0 15.1 28.3 41.5 54.3 4 44 28.24 5.41 14 Mars . . . N.P. 48.3 1.5 14.7 28.0 40.7 4 49 14.64 1.11 4 46.40 4.30 15 ... 396 37.7 50.8 4.0 17.4 30.2 4 51 4.02 5 66 16 M:us . . . S.F. 84.7 38.1 51.2 4.5 17.3 4 55 51.14 0.37 4 47.12 5.29 17 ll.'ssH ... 396 3.5 16.9 30.2 43.5 56.1 4 57 30.04 5.83 18 Mar« . . . N.P. 49.5 2.6 15.7 29.0 42.0 5 2 15.76 + 1.44 +4 45.72 —4.39 62 OPPOSITION OF MARS, 1849-50, JANUARY 15, 185O— Continued. e B Chronometer time of transit. Planet— Star. Miermometers • Micr. Bar. • 1 Object. A. B. C. D. K. A o. A<5. Air. Wet. o s. s s. s. s. h. m. s. Rev. m. a. Rev. Inches. 0 0 K 19 Bessel ... 396 33.0 46.2 59.2 12.7 25.4 5 3 59.30 +5.98 28.091 76.0 62.7 20 Mars . . . 8.F. 20.0 33.2 46.3 59.5 12.5 5 8 46.30 0.65 +4 47.00 —5.33 Ther. an. 21 Bessel ... 396 3.5 16.8 29.8 43 2 56.0 5 10 29.86 6.23 75° .2 22 a Mare . . . N.P. 47.5 1.5 14.5 28.0 40.5 5 15 14.40 1.76 4 44.54 4.47 Bar. red. to32°F. 27.963 23 Bessel ... 396 38.0 51.2 4.3 17.8 30.5 5 17 4.36 6.35 94 Mars . . . 8.F. 24.7 38.2 51.3 4.5 17.5 5 21 51.24 0.92 4 46.88 5.43 25 Bessel ... 396 54.0 7.2 20.4 33.8 46.3 5 23 20.34 6.45 26 Mars . . . N.P. 39.5 53.0 6.3 19.4 32.2 5 28 6.08 2.03 4 45.74 4.42 87 Bessel ... 396 14.6 27.7 41.0 54.3 7.0 5 29 40.92 6.55 38 Mars . . S.F. • • 14.5 27.5 40.8 53.5 5 34 27.47 1.18 4 46.55 5.37 29 Bessel ... 396 50.5 3.6 16.8 30.5 43.1 5 36 16.90 6.63 got Mare . . . N.P. 36.0 49.2 2.5 15.8 28.5 5 41 2.40 2.20 4 45.50 4.43 31 Bessel ... 396 45.7 59.0 12.3 25.7 38.5 5 43 12.24 7.02 32 Mars . . . S.F. 32.5 45.5 58.8 12.3 25.0 5 47 58.80 1.60 4 46.56 5.42 33 Bessel ... 396 11.5 24.5 37.7 51.1 3.7 5 49 37.70 6.95 34 c Mars . . . N.P. • • 8.5 21.6 35.0 47.8 5 54 21.62 2.42 4 43.92 4.53 35 Bessel ... 396 35.5 48.8 2.0 15.3 28.0 5 56 1.92 6.95 36 Mars . . . S.F. 21.3 34.5 47.5 1.0 13.7 6 0 47.60 1.42 4 45.68 5.53 37 d Bessel ... 396 54.4 7.5 29.8 34.2 46.8 6 2 20.74 7.02 38 e Mars . . . N.P. 39.2 52.4 5.5 18.8 31.5 6 7 5.48 2.48 4 44.74 4.54 39 Bessel ... 396 8.4 21.5 34.8 48.0 0.5 6 8 34.64 7.12 40 Mars . . . S.F. 54.0 7.0 20.2 33.6 46.4 6 13 20.24 1.63 4 45.60 5.49 41 Bessel ... 396 23.5 36.8 50.0 3.2 16.0 6 14 49.90 7.32 42 Mars . . . N.P. 8.0 21.3 34.5 47. a 0.5 6 19 34.42 2.87 4 44.52 4.45 43 Bessel ... 396 46.5 .'i9.6 13.0 26.5 39.0 6 21 12.92 6.15 44 Mars . . . S.F. 32.0 45.2 58.5 11.8 24.5 6 25 58.40 0.70 4 45.48 5.45 45 Bessel . • . 396 59.3 12.5 25.5 39.0 51.5 6 27 25.56 6.42 46 Mars . . . S.P. 56.5 9.5 23.0 36.0 6 32 9.65 1.04 4 44.09 5.38 47 Bessel . . , 396 56.0 9.5 32.8 36.5 49.0 6 35 22.76 6.53 48 Mars . . . N.F. 41.5 55.0 8.2 21.6 34.3 6 40 8.12 + 1.95 +4 45.36 —4.58 Remarks. A remarkably clear night, without the least visible haze or cloud, and the stars shining with unusual lustre. The observations are very fair throughout. a Unsteady. d Micrometer recorded -f 8 02 rev. b Steady. * Good. c Very good. Results. h. m. s. m. s. Kev. / /' Mean N.P. . . Eleven transits . . . 5 14 57.09 + 4 45.613 .... —4.406 . . . . = 1 25.87 Mean S. F. . . Eleven transits . . . 5 21 39.43 4 46.745 .... 5.375 . . . . 1 44.76 Mean 8. P. . . One transit . . . . 6 32 9.65 4 44.090 .... 5. 380 . . . . 1 44.85 Mean N. F. . . One transit . . . . 6 40 8.12 + 4 45.360 .... —4.580 . . . . =129.26 h. m. h. m. s. h. m. h. m. s. Correction for chronometer at 5 15 . . — 54.05 Correction for chronometer at 6 32 . . — 54.19 Correction for chronometer at 5 22 . . — 54.06 Correction for chronometer at 6 40 . 54.20 Santiago sicl. time N.P 5 14 3.04 Santiago SIL 6 31 15.46 Santiago sid. time S. F 5 20 45.37 Santiago sid. time N F 6 39 13.92 Interval 6 42.33 Interval 7 58.46 AT SANTIAGO DE CHILE. 63 .• ; JANUARY 15, 1850— Continued. Results — Continued. A P. F. limbs i n A. R. reduced to arc . . . 16.98 A N. S. limbs micr. in rev . 0.969 = 18.89 Variation of A . R. in 6m. 42s . . + 1.95 Variation of declination in 6m. 42s. . — 0.29 Observed P. F . diameter . . 18.93 Corr. for diarn. of micr. wires . . . — 2.20 Observed N. S. diameter .... 16 40 A P. F. limbs ii i A. R. reduced to arc . . 19.05 A N. S. limbs micr. in rev . 0.800 = 15.59 Variation of A . R. in 7m. 58» — 2.34 Variation of declination in 7m. 58s. + 0.35 Observed P. F. diameter ... . . 16.71 Corr. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 13.74 h. m. « h. m. « A p at 5 12 0.09 A p at 6 29 0 12 A p at 5 18 0.11 A p st 6 37 0.11 JANUARY 16, 1650. No. for reference. Object. Chronometer time of transit. Hean of wires. Micr. Planet — Star. Bar. rhermometers. A. B. C. D. E. An. A. Rev. Inches. • • 1 Bessel ... 396 41.3 54.5 7.6 21.2 33.8 3 50 7.68 +8.73 28.039 74.5 61.0 2 Mars . . . N.P. 2.5 15.8 28.8 42.0 54.8 3 54 28.78 1.43 +4 21.10 —7.30 3 4 5 Bessel ... 396 Mars . . . S.F. Bessel ... 3% 23.0 44.6 11.8 36.0 58.0 25.0 49.0 11.1 38.0 2.5 34.5 51.5 15.2 37.3 4.5 3 56 49.14 4 1 11.10 4 4 38.16 8.93 0.64 9.55 4 21.96 8.29 Ther. att. 73°. 7 Bar. red. to 32° F. 27.912 6 Mars . . . N.P. 32.5 45.7 58.7 12.1 24.7 4 8 58.74 2.18 4 20.58 7.37 7 Bessel ... 396 18.0 31.3 45.0 58.5 11.0 4 10 44.76 9.58 8 Mars . . . 8.F. 40.6 53.6 6.8 20.3 33.2 4 15 6.90 1.25 4 22.14 8.33 9 Bessel ... 396 13.1 26.2 39.5 52.8 5.2 4 16 39.36 9.95 10 Mare . . . N.P. 33.7 47.5 0.5 13.5 26.3 4 21 0.30 2.59 4 20.94 7.36 11 Bessel ... 396 22.3 35.3 48.5 1.3 14.5 4 22 48.38 9.06 12 Mars . . . S.F. 43.7 57.0 10.0 23.5 38.3 4 27 10.10 0.74 4 21.72 8.32 13 Bessel ... 396 21.5 34.7 48.0 1.3 14.0 4 28 47.80 8.88 14 Mars . . . N.P. 55.3 8.3 21.5 34.3 4 33 8.22 1.49 4 20.32 7.39 15 Beesel . . 396 46.5 59.8 13.0 26.5 39.0 4 40 12.96 9.17 16 Mars . . . S.F. 7.7 31.2 34.0 47.5 0.5 4 44 34.18 0.74 4 21.22 8.43 17 Beasel ... 396 33.2 46.5 59,5 13.0 35.3 4 45 59.60 9.49 18 Mnrs . . . N.P. 53.2 6.5 19.7 33.0 45.7 4 50 19.62 1.94 4 20.02 7.48 19 Bessel . . . 396 28.8 42.2 55.2 8.5 21.2 4 51 55.18 9.50 20 Mars . . . S.F. 50.3 3.5 16.5 30.0 42.5 4 56 1C. 56 1.12 4 21.38 8.38 91 Bessel ... 396 26.2 39.3 52.5 6.0 18.6 5 0 52.52 9.73 32 Mara . . . N.P. 45.5 59.0 12.3 25.8 38.5 5 5 12.22 2.28 4 19.70 7.45 23 Bessel ... 396 28.2 41.5 54.5 8.0 20.5 5 6 54.54 9.86 24 a Mars . . . S.F. 49.0 2.2 15.3 28.6 41.3 5 11 15.28 1.40 4 20.74 8.46 25 Bessel ... 396 48.0 1.3 14.5 27.8 40.5 5 13 14.42 10.01 26 Mars . . . N.P. 7.5 20.5 34.0 47.5 0.2 5 17 33.94 2.51 4 19.52 7.50 27 Bessel ... 396 0.0 13.4 26.5 39.8 52.5 5 19 26.44 10.22 28 Mars . . . S.F. 21.0 34.2 47.5 0.5 13.5 5 23 47.34 1.78 4 20.90 8.44 29 Bessel ... 396 10.0 23.7 37.0 50.3 3.0 5 25 37.30 10.30 306 Mars . . . N.P. 32.5 45.8 58.7 12.2 25.0 5 29 58.84 2.74 4 21.54 7.56 31 Beasel ... 396 95.0 38.9 51.5 4.5 17.5 5 31 51 .28 9.47 32 Mars . . . S.F. 44.5 58.5 11.5 25.0 37.7 ' 5 36 11.44 +0.99 +4 20.16 -8.48 64 OPPOSITION OF MARS, 1849-50, JANUARY 16, 1850— Continued. No. for reference. Object. Chronometer time of transit. Mean of \viics. Micr. Planet— Star. Bar. riirrmometcrs. A. B. C. D. E. Ad. AJ. Air. Wet. s. 8. s. s. s. h. in. s. Rev. m. s. Rev. Inches. • .• 33 Bessel ... 396 48.0 1.4 14.6 28.0 40.5 5 38 14.50 +9.55 28.039 74.5 61.0 34 c Mars . . . N.P. 7.5 20.5 33.5 46.8 59.7 5 42 33.60 2.04 +4 19.10 —7.51 35 36 37 Bessel ... 396 Mars . . . S.F. Bessel ... 396 42.2 1.7 46.0 55.2 15.5 59.4 8.4 28.5 12.2 21.8 41.8 25.8 34.5 54.8 38.3 5 44 8.42 5 48 28.46 5 SO 12.34 9.65 1.18 9.90 4 20.04 8.47 Ther. att. 73°. 7 Bar. red. to 3S° F. 27.912 38 d Mars . . . N.P. 18.3 31.2 44.5 57.2 5 54 31.20 2.30 4 18.86 7.60 39 Bessel ... 396 8.0 21.0 34.3 47.5 0.2 5 56 34.20 9.99 40 Mars . . . S.F. 27.5 41.0 54.3 7.5 20.3 6 0 54.12 1.42 4 19.92 8.57 41 Bessel ... 396 5.2 18.6 31.5 45.0 57.7 6 2 31.60 10.52 42 Mars . . . N.P. 24.3 37.5 50.5 3.5 16.5 6 6 50.46 2.92 4 18.86 7.60 43 Bessel ... 396 9.3 22.5 35.5 49.0 1.5 6 8 35.56 8.76 44 Mars . . . S.F. 29.0 42.2 55.5 8.7 21.5 6 12 55.38 0.19 4 19.82 8.57 45 Bessel ... 396 14.2 27.5 40.6 54.0 5.8 6 14 40.42 8.44 46 Mars . . . N.P. 32.2 45.1 58.8 12.2 25.0 6 18 58.66 0.84 4 18.24 7.60 47 Bessel ... 396 11.0 24.2 37.5 50.6 3.5 6 20 37.36 8.57 48 Mars . . . S.F. 30.0 43.5 56.5 9.8 22.5 6 24 56.46 0.03 4 19.10 8.54 49 Bessel ... 396 42.0 55.2 8.3 21.7 34.5 6 27 8.34 8.61 50 Mars . . . N.P. 59.8 13.0 26.0 39.3 52.0 6 31 26.02 0.95 4 17.68 7.66 51 Ressel ... 396 57.0 10.2 23.4 36.8 49.5 6 33 23.38 9.31 52 Mars . . . S.F. 29.7 42.5 56.0 8.5 6 37 42.57 0.73 4 19.19 8.58 53 Bessel ... 396 21.5 34.5 47.5 1.0 13.6 6 39 47.62 8.98 54 Mars . . . N.P. 39.0 52.1 5.4 18.6 31.3 6 44 5.28 +1.23 +4 17.66 —7.65 Remarks. Until the planet passed the meridian, there was much flickering light and unsteadiness of motion. No cloud visible, and only a dry haze over the valleys ; yet, even stars near the zenith could not be seen with the distinctness of last night, a More steady. c Steady. b An evident slip of the telescope in A. R. Rejected. d Perfectly steady. Results. Mean N. P. . . Thirteen transits . Mean S. F. . . Thirteen transits , h. m. s. 5 20 42.08 . 5 21 34.61 m.a. Rev. + 4 19.429 .... —7.498 . + 4 20.638 .... —8.451 . / / . . . =226.14 ... =2 44.71 h. m. Correction for chronometer at 5 21 . . Correction for chronometer at 5 22 . 8. . . —56.68 . . —56.68 Santiago sid. time N.P. . . . h. m. s. ... 5 19 45.40 ... 5 20 37.93 . . . 52.53 A P. F. limbs in A. R. reduced to arc . Variation of A. R. in 53« Observed P. P. diameter // . . 18.13 . . +0.22 . . 18.35 A N. S. limbs micr. in rev. . . Variation of declination in 53s. . Corr. for diam. of micr. wires . n . . 0.953=18.57 . . — 0.04 . . — 2.20 Observed N. S. diameter . . . . . 16.33 b. m. A f at 5 18 ....... n - . 0.16 h. m. A p at 5 18 . . it . 0.18 AT SANTIAGO DE CHILE. 65 JANUARY 17, 1830. •j ('lironnmrti-r time of transit. Planet— Star. Thermometers. 1 Mean of wires Micr. Bar. c £ Object. A. B. C. D. E. A a. At. Air. Wet. 1 c 8. s. 8. s. s. b. m. s. Bar. m. 8. Bev. Inches. 0 ° 1 Mts-.'l . . . 3D6 55.8 9.2 23.3 35.7 48.5 3 48 22.28 +7.14 28.045 71.1 59.9 2 Mars . . . N.P. 54.7 8.0 21.0 34.3 46.8 3 53 20.96 —3.30 +3 58.68 —10.34 Thcr. att 3 I!*'- tl . . .396 59.0 12.5 35.5 38.9 51.5 3 54 25.48 +3.72 70°. 7 4 Mara . . . S.F. 58.5 11.7 34.8 38.3 51.0 3 58 24.86 —7.56 3 59.38 11.38 Bar. red. to 32° F. * 27.931 5 Hrssd ... 396 2'J.O 42.3 55.5 9.0 21.7 4 0 55.50 +4.17 6 Mars . . . N.P. 27.3 40.5 53.6 7.0 19.8 4 4 53.64 -6.24 3 58.14 10.41 7 llrssc '1 ... 396 38.3 41.5 54.5 7.9 19.6 4 6 54.36 +4.39 8 Mars . . . S.F. 27.5 40.8 54.0 7.2 20.0 4 10 53.90 —6.98 3 59.54 11.37 9 Brssrl . . . 396 33.8 37.0 50.3 3.5 16.2 4 12 50.14 +4.65 10 Mars . . . N.P. • • 35.2 48.3 1.4 14.3 4 16 48.17 —5.68 3 58.03 10.33 M Hesse! ... 396 V.6 30.6 33.8 47.4 0.3 4 18 33.92 +4.91 13 Mars . . . S.F. 6.6 19.8 33.0 46.3 59.0 4 32 33.94 —6.44 3 59.02 11.35 13 Bi'sscl ... 396 51.5 4.9 18.1 31.2 44.0 4 24 17.94 +5.05 14 Mars . . . N.P. 49.5 2.5 15.5 28.8 41.3 4 28 15.52 —5.40 3 57.58 10.45 u . . .396 10.5 24.3 37.3 51.5 3.5 4 34 37.42 +5.30 16 Mara . . . S.F. 9.7 33.0 36.0 49.5 3.2 4 38 36.08 —6.15 358.66 11.45 17 BrssH ... 396 1.0 14.3 37.3 40.5 53.2 4 40 27.24 +5.50 18 .Mars . . . N.P. 58.3 11.4 24.6 38.0 50.8 4 44 24.62 —4.97 3 57.38 10.47 19 ll< >-''! ... 3% 14.6 27.8 41.0 54.3 7.0 4 48 40.94 +5.74 M Mars . . . S.F. 13.0 36.0 39.3 52.5 5.2 4 52 39.18 —5.73 3 58.24 11.47 31 Bessel ... 396 0.1 13.3 26.3 39.6 52.3 4 54 26.32 +6.09 32 Mars . . . N.P. 56.0 9.5 23.0 36.5 4*. a 4 58 22.84 —4.30 3 56.52 10.39 23 liessel . . 396 3.3 15.5 28.2 41.8 54.5 5 0 28.46 +6.28 24 Mars . . . S.F. 0.3 13.4 26.5 40.0 52.6 5 4 36.54 —5.21 3 58.08 11.49 25 Bessel ... 396 34.0 47.3 0.2 13.7 26.5 5 6 0.32 +6.43 Ma Mars . . . N.P. 31.0 44.2 57.5 10.7 23.5 5 9 57.38 —4.09 3 57.06 10.52 27 . . .496 13.3 26.5 39.5 53.0 5.6 5 11 39.58 +5.72 28 Mars . . . S.F. 11.5 24.7 37.9 51.0 3.8 6 15 37.78 —5.84 3 58.20 11.56 29 . . .396 58.0 11.8 24.2 37.4 50.5 5 17 34.38 +5.66 30 /. Mars . . . N.P. 55.3 8.5 21.6 34.8 47.5 5 31 31.54 —4.90 3 57.16 10.56 31 : . . .396 35.0 48.2 1.5 14.7 27.5 523 1.38 +5.76 32 Mars . . . S.F. 33.3 46.5 59.5 13.0 25.5 5 26 59.56 —5.67 3 58.18 11.43 33 Hc-.-.-H ... 396 23.5 36.5 49.8 3.2 16.0 5 28 49.80 +5.90 34 Mars . . N.P. 20.3 33.5 46.5 0.0 12.7 5 32 46.58 —4.66 3 56.78 10.56 55 Ili'—i'l ... 396 6.5 30.0 33.0 46.5 59.0 5 34 33.00 +5.87 n Mars . . . S.F. 4.4 18.0 31.0 44.5 57.2 5 38 31.03 —5.54 3 58.02 11.41 37c ... 396 12.0 25.0 39.0 52.5 5.2 5 40 38.74 +6.08 38 d . . . N.P. 9.5 22.8 35.8 49.0 1.8 5 44 35.78 —4.56 3 57.04 10.64 39 ... 396 13.6 27.0 40.0 53.4 6.1 5 46 4(1.0--! +6.16 40 Mars . . . S F. 11.5 24.7 37.8 51.2 3.8 5 50 37.80 —5.39 3 57.78 11.55 41 . . . 396 2.0 15.2 28.2 41.5 54.3 5 52 28.82 +6.26 42 Mars . . . N.P. 58.3 11.4 24.6 37.8 50.5 5 56 34.50 —4.37 3 56.28 10.63 43 ... 396 56.3 9.5 22.6 30. 0 .48.5 5 58 :; +6.38 44 Mars . . . S.I'. 53.8 7.2 20.3 33.5 40.2 6 3 20.18 —5.27 3 57.60 11.55 45 . . 396 43.7 57.2 10.3 36.2 6 4 10.18 +6.22 46 Mare . . . N.P. 40.2 6.5 19.8 32.5 6 8 6.58 —4.46 +3 S6..IO —10.68 1 1 66 OPPOSITION OP MARS, 1849-50, JANUARY 17, 185O— Continued. « Chronometer time of transit. Micr Planet— Star. Thermometers. I £ Object. A. B. C. D. E. A a. A j. Air. Wet. £ 0 g 8. a. s. s. h. m. s. Rev. in. s. Rev. Inobes. , 0 Z 47 Bessel ... 396 24.0 37.3 50.5 3.8 16.5 6 9 50.52 +6.39 28.045 71.1 59.9 48 Mars . . . S.F. 21.3 34.5 47.8 1.9 13.6 6 13 47.68 -5.21 +3 57.16 —11.60 Ther. att. 49 llesscl ... 396 21.3 34.5 47.5 1.0 13.7 6 15 47.60 +6.33 70". 7 Ml Mars . . . N.P. 17.5 30.5 43.5 57.0 9.6 6 19 43.62 —4.29 3 56.02 10.62 Bar. red. to 33° F. 27.931 51 Bessel ... 396 2.3 15.5 38.6 42.2 54.5 6 21 28.62 +6.47 52 Mars . . . S.F. 59.5 12.5 25.6 38.8 51.5 6 35 25.58 —5.17 3 56.96 11.64 53 Bessel ... 396 44.0 57.5 10.5 24.0 36.5 6 27 10.50 +6.58 54 Mars . . . N.P. 39.8 53.0 6.2 19.5 32.2 6 31 6.14 —4.10 3 55.64 10.68 55 Bessel ... 396 48.5 2.0 15.5 38.8 41.2 6 37 15.20 +6.30 56 Mars . . . S.F. 45.2 59.0 12.0 25.5 38.2 6 41 11.98 —5.35 3 56.78 11.65 57/ Bessel ... 396 13.0 36.0 39.3 52.8 5.5 6 44 39.22 +6.90 58 Mars . . . N.P. 8.8 21.8 35.0 48.2 1.0 6 48 34.96 —3.80 3 55.74 10.70 59 Bessel ... 396 35.5 48.8 2.0 15.5 28.0 650 1.96 +6.28 60 Mare . . . S.F. 32.0 45.8 58.5 11.8 24.5 6 53 58.40 —5.49 +3 56.44 —11.77 Remarks. Mars was extremely unsteady and flaring during the early part of the evening; hut shortly after passing the meridian, and until the close, all the measures were made under favorable circumstances. n More steady. d Very steady. b Good. e Fine. c Recorded 13s. at wire A. / Recorded 6A. 43m. Results. h. m. s. m. i. Rev. , // Mean N. P. . . Fifteen transits . . . 5 19 50.85 + 3 56.963 .... — 10.53S . , . . =3 25.33 Mean S. F. . . Fifteen transits . . . 5 26 24.23 + 3 58.003 .... —11.505 . , . . =344.23 h. m. m. s. h. m. s. Correction for chronometer at 5 20 . . — 1 0.01 . . 5 18 50.84 Correction for chronometer at 5 26 . . . — 1 0.02 . . 5 25 24.21 . . 6 33.37 A P. F. limbs in A. R. reduced to arc . . . 15.60 A N. 9. limbs mien in rev. . . . . 0.973=18.96 Variation of A. R. in 6m. 33s. . . + 1 40 Vnr'at'n f A V at'on " fi T? 0.26 Observed P. F. diameter . . 17 00 f • 2.20 Observed N. S. diameter 16.50 h. m. // h. m. H A p at 5 17 0.22 A a at 5 23 . 0.24 JANUARY 18, 1850. V Chronometer time of transit. Planet— Star. Thermometers. V Object. A. B. C. D. E. A a. A S. Air. Wet. I s. s. 8. a. a. h. m. a. Rev. m. s. Rev. Inches. O .- 1 Bessel ... 396 13.2 26.2 39.5 53.0 5.7 4 0 39.52 +5.91 28.082 70.5 55.4 2 Mars . . . N.P. 51.4 5.5 18.5 31.8 44.5 4 4 18.34 —7.41 +3 38.82 —13.32 3 Bessel ... 396 17. 5 30.5 43.5 57.2 7.8 4 6 43.70 +5.59 Ther. att. 72°. 4 4 Mars . . . S.F. 11.0 23.8 37.2 50.0 4 10 23.90 —8.69 3 40.20 14.28 Mar. r<'{|. lo33 F. So Besael ... 396 15.0 nj 41.5 65.0 7.5 4 31 41.50 +6.09 6 Mars . . . N.P. 53.5 7.2 20.2 33.4 46.0 4 35 20.06 —7 23 +3 38.56 — 13.32 AT SANTIAGO DE CHILE. 67 JANUARY 18, 185O— Continued. c u ChronnnnTi'r time of transit. Planet — Star. Thermometers. Wpln ,. Micr. Bar. 1 £ Object. A. B, O. D. E. A a. &J. Air. Wet. 6 2 s. s. 6. s. g. h. in. s. Rev. m. s. Rev. Inches. • • 7 Hc^fl ... 396 6.0 19.3 32.3 46.0 58.3 4 37 32.38 +6.20 28.082 70.5 55.4 8 Mara . . . 8.F. 45.5 59.0 12. 0 25.5 38.2 4 41 12.04 —8.06 +3 39.66 —14.26 Ther. att. 9 li.^.-rl ... 396 18.5 31.7 44.8 58.0 10.5 4 42 44.70 +6.14 72. °4 10 Mars . . . N.P. 56.4 9.5 23.6 36.0 48.8 4 46 2-2.66 —7.21 3 37.96 13.35 Bar. red. to 32° F. 27.962 11 Hiwl ... 396 54.5 8.0 21.2 34.6 47.3 4 48 21.12 +6.44 12 Mars . . . S.F. 34.3 47.5 0.7 14.0 28.5 4 52 0.60 —7.89 3 39.48 14.33 13 llo-i'l ... 395 11.3 24.5 37.8 51.1 3.7 4 53 37.68 +6.67 14 Mars . . . N.P. 16.0 29.5 42.2 4 57 16.06 —8.77 3 38.38 13.44 15 ... 396 29.5 42.5 55.5 9.0 22.0 4 59 55.74 +6.98 16 Mars . . . S.F. 7.2 20.2 33.5 46.5 59.2 5 3 33.32 —7.43 3 37.58 14.39 17 Bessel ... 396 57.7 10.8 24.0 37.5 50.2 5 5 24.04 +7.10 IB Mars . . . N.P. 34.5 48.2 1.7 14.8 27.5 5 9 1.34 —6.32 3 37.30 13.42 19 Bessel ... 396 23.2 36.4 49.8 3.0 15.6 5 10 49.60 +7.27 20 Mars . . . S.F. 2.5 15.5 28.7 42.0 54.8 5 14 28.70 —7.22 3 39.10 14.49 21 ll.-.-sd ... 396 50.0 4.0 16.8 30.5 43.2 5 16 16.90 +7.36 S2 Mars . . . N.P. 29.3 42.5 55.5 8.7 21.5 5 19 55.50 ^5.07 3 38.60 13.43 23 Bessel ... 396 16.3 29.4 42.5 56.0 8.7 5 21 42.58 +7.50 24 Mars . . . S.F. 55.5 8.5 21.7 35.1 47.7 5 23 21.70 —6.89 3 39.12 14.39 25 Bessel ... 396 47.5 0.5 13.8 27.2 40.0 5 27 13.80 +7.72 26 Mars . . . S.F. M.I 53.0 6.2 19.0 5 30 53.94 —6.72 3 39.14 14.44 27 Bessel ... 396 3.0 16.5 29.7 43.0 55.7 5 33 29.58 +7.86 28 Mars . . . ^N.P. 41.0 54.3 7.4 20.5 33.5 5 37 7.34 —5.46 3 37.76 13.32 29 Bessel ... 396 46.7 0.0 13.0 26.3 39.0 5 39 13.00 +8.02 30 Mars . . . N.P. 34.5 37.8 50.8 4.5 17.0 5 42 50.92 —5.43 3 37.92 13.45 31 Bessel . . . 396 4.0 17.7 30.2 43.8 56.5 5 44 30.44 +8.03 32 Mars . . . S.F. 43.2 56.4 9.4 23.0 35.6 5 48 9.52 —6.41 3 39.08 14.44 33 Bessel ... 396 40.5 54.0 7.0 20.5 33.0 5 50 7.00 +8.20 34 Mars . . . N.P. 18.8 31.8 45.0 58.3 11.2 5 53 45.02 —5.37 3 38.02 13.57 ss Bessel ... 396 4.2 17.5 30.5 44.0 56.5 5 55 30.54 +8.37 an Mars . . . S.F. 43.2 56.5 9.2 22.5 35.5 5 59 9.38 —6.22 3 38.84 14.59 Si Besael ... 396 35.0 38.0 51.2 4.5 17.0 6 0 51.14 +7.05 38 Mars . . . N.P. 2.5 15.5 28.5 42.0 54.5 6 4 28.60 —6.54 3 37.46 13.59 39 Bessel ... 396 45.0 58.5 11.5 24.8 37.5 6 6 11.46 +7.98 40 Mars . . . S.F. 23.7 37.0 50.2 3.5 16.2 6 9 50.12 -6.76 3 38.66 14.74 41 Besael ... 396 42.3 55.5 8.5 22.0 34.8 6 12 8.62 +7.16 42 Mars . . N.P. 19.5 32.5 45.8 59.4 12.2 6 15 45.88 —6.41 3 37.28 13.57 43 Bessel ... 396 8.2 21.5 34.5 48.0 0.7 6 17 34.58 +7.20 44 Mars . . . S.F. 46.5 0 0 13.0 26.5 39.2 6 21 13.04 —7.31 3 38.46 14.51 45 1 , . .396 14.5 37.7 40.8 54.1 7.0 6 23 40.82 +7.19 46 Mars . . . N.P. 51.0 4.5 17.5 31.0 44.0 6 27 17.60 —6.39 3 36.82 13.58 47 Bessel . . . 396 0.5 13.5 36.5 40.2 53.0 6 29 26.74 +7.14 48 Mars . \ . S.F. 38.5 51.5 4.5 18.2 31.0 6 33 4.74 —7.39 +3 38.00 —14.53 A most unfavorable night for observations, both object* n-|;.inli'(l as "good;" the otlii'r* "fair" only. Remarks. very uni two of the measures toward? the close can h« II Mli'lMIIII'tlT If.'. II. I.-. I + .'..IW II V- 68 Mean N. P. Mean 8. F. OPPOSITION OP MARS, 1849-50, JANUARY 18, 1850-Coiitlnued. Twelve transits . Twelve transits . h. m. Correction for chronometer at 5 25 Correction for chronometer at 5 29 Results. h. m. s. 5 24 27.44 5 29 6.67 m. s. 3.31 3.32 in. s. + 3 37.905 + 3 38.943 Rev. — 13.447 — 14.449 Santiago sid. time N. P. Santiago sid. timeS. F. Interval . =4 22.08 . =4 41.61 h. m. s. . 5 23 24.13 . 5 28 3.35 4 39.22 A P. F. limbs in A. R. reduced to arc . . . 15.57 Variation of A. R. in 4m. 39s +0.84 Observed P. F. diameter 16.41 h. m. A p at 5 22 , 0.28 AN. S. limbs micr. in rev 1.002=19.53 Variation of declination in 4m. 39s. . — 0.19 Corr. lor diam. of micr. wires ... — 2.20 Observed N. S. diameter 17.14 h. m. A f at 5 26 0.30 ' JANUARY 19, 1850. OJ Chronometer time of transit. Planet— Star. Tlii-rmoiiic-U'rs. | M f ' Micr Bar. ! Object. A. B. C. D. E. A a. A& Air. Wet. d 8. s. s. li. m. s. Rev. m. s. Rev. Inches. . • 2 1 Mare . . . N.P. 12.7 26.0 38.8 52.3 4.8 4 48 38.92 +10.87 28.064 67.5 56.0 2 Bessel . , . 405 14.0 67.5 40.5 54.0 6.5 4 52 40.50 — 5.54 —4 1.58 +16.41 Ther. att. • 69° 2 3 Mars . . . S.F. 41.5 54.5 7.5 21.0 33.5 5 12 7.60 + 7.26 Bar. red. 4 Bessel ... 405 55.5 8.5 21.6 34.2 5 16 8.35 — 8.19 —4 0.75 +15.45 to 32° F. Remarks. Much dry haze, with light cirri, and an eitrcmcly minute star, combined to frustrate efforts to observe. There is also a difference in the observed and computed R. A. of the star, amounting to more than fifteen seconds ; and we cannot examine it for want of a copy of Bessel 's Zones. Correction for chronometer at 5 12 Results. h. m. s. Mean N. P. . . . One transit . . . 4 48 38.92 Mean S. F. . . . One transit . . 5 12 7.60 li. m. m. s. Correction for chronometer at 4 49 . , . —1 6.52 — 1 6.57 111. 6. — 4 1.580 — 4 0.750 Rev. + 16.410 + 15.450 Santiago sid. time N. P. Santiago sid. time S. F. Interval .... = 5 19.83 = 5 1.12 h. m. s. 4 47 32.40 5 11 1.03 23 28.63 A P. F. limbs in A. R. reduced to arc Variation of A. R. in 23m. 29s. . . Observed P. F. diameter . h. m. A p at 4 50 . 12.45 + 3.29 15.74 0.34 A N. S. limbs micr. in rev 0.960 = 18.71 Variation of declination in 23m. 29s. . . — 0.86 Corr. for diam. of micr. wires ... — 2.20 Observed N. S. diameter ..'... 15.65 h. m. A (i at 5 13 . 0.32 AT SANTIAGO DE CHILE. 69 JANUARY 80, 1850. o Chronometer time of tran, it. Micr Planet— Star. Ttnr Thermometers. i Object. A. B. C. D. E. inicr. An. A I. IMUi Air. Wet. t£ c Z 8. B. s. 8. s. h. in. s. Rev. 111. S. Rev. Inches. • • 1 Mars . . . N.P. 44.5 57.5 10.8 24.0 36.8 4 23 10.72 +6.92 28.060 68.0 56.2 2 l!<-s>rl ... 405 57.7 10.7 24.2 37.5 50.0 4 27 24.02 —6.73 —4 13.30 +13.65 Ther. att. 3 Murs . . . 8.F. 4.0 17.5 30.5 43.6 56.5 4 29 30.42 +6.39 66°. 0 4 Bessel . . . 405 1C. 3 29.5 42.5 56.0 8.5 4 33 42.56 —6.40 4 12.14 12.79 Bar red. to 33° F. 27.959 5 Mars . . . N.P. 54.8 8.0 21.5 34.8 47.3 4 37 21.28 +7.67 6 Besscl . . . 405 8.3 21.3 34.5 48.0 0.8 4 41 34.58 —5.97 4 13.30 13.64 7 Mars . . . S.P. 44.6 57.6 11.0 24.3 37.0 4 43 10.90 +7.07 8 Besscl ... 405 56.5 10.0 23.0 36.4 49.1 4 47 23.00 —5.71 4 12.10 12.78 9 Mars . . . N.P. 40.5 53.7 6.8 20.2 33.0 4 49 6.84 +8.21 10 IV>.,,!l ... 405 6.8 19.8 33.2 46.0 4 53 19.85 —5.41 4 13.01 13.62 11 Mars . . . 6.F. 1.6 15.0 38.0 41.2 54.0 4 55 27.96 +5.97 Id BessH ... 405 27.5 40.5 53.8 6.5 4 59 40.48 —6.74 4 12.52 12.71 13 Mars . . . N.P. 58.0 11.2 24.3 37.6 50.5 5 1 24.32 +7.09 14 lir^rl ... 405 11.5 24.5 38.0 51.0 3.8 5 5 37.76 —6.47 4 13.44 13.56 15 Mars . . . 8.F. 51.6 5.0 18.0 31.5 44.2 5 7 18.06 +6.38 16 Bcsscl ... 405 4.3 17.5 30.5 44.0 56.5 5 11 30.56 —6.36 4 12.50 12.74 17 Mars . . . N.P. 42.5 55.8 9.2 22.4 35.1 5 13 9.00 +7.48 18 Ili'sM'l ... 405 55.5 9.0 22.5 36.0 48.5 5 17 22.30 —6.05 4 13.30 13.53 1!) Mars . . . S.P. 15.0 28.2 41.2 54.5 7.5 5 19 41.28 +7.01 Bessel ... 405 27.5 40.7 53.8 7.0 20.0 5 23 53.80 —5.68 4 12.52 12.69 n Mars . . . N.P. 53.5 6.5 19.8 33.2 46.0 5 26 19.80 +7.92 •.'•> Bessel ... 405 7.5 20.5 33.5 46.8 59.5 5 30 33.56 —5.60 4 13.76 13.52 23 Mars . . . S.F. 48.5 1.5 14.8 28.0 40.7 5 32 14.70 +7.17 24 Bessel . . . 405 1.5 14.5 27.5 40.8 53.5 5 36 27.56 —5.55 -4 12.86 +12.92 Remarks. The night is extremely favorable for observations. A rather low temperature, and many cirri driving steadily from N.W. all day, evidencing that Hi- -s.W. wind, wliii.-li pn'vmlrd lirir ;it ilir >;imr time, was purely local. No sign of a cloud visible a few minutes alter sunset, but the star is so excessively small that it does not bear as great illumination as is necessary for satisfactory measures. Results. M.TIII N. P. Mean 3. F. Six transits Six transits h. m. Correction for chronometer at 4 55 Correction for chronometer at 5 1 h. m. 8. 4 55 5.33 5 1 13.88 m. s. — 1 9.82 — 1 9.83 m. 8. — 4 13.352 — 4 12.440 Santiago sid. time N. P. Santiago sid. time S. F. Interval Rev. + 13.587 + 12.772 = 4 24.81 = 4 8.93 h. m. s. 4 53 55.51 5 0 4.05 6 8.54 A P. F. limbs in A. R. reduced to arc Variation of A. K. in 6m. 8«. . . Observed P. !•'. diameter . 13.68 + 0.64 14.32 A N. g. limbs micr. in rev 0.815 = 15.88 Variation of declination in 6m. 8s. . — 0.21 Corr. for diam. of micr. wires ... — 2.20 id N. S. diameter 13.47 h. in. A f at 4 56 . 0.28 h. m. A p at 5 2 0.26 70 OPPOSITION OF MARS, 1849-50, JANUARY 31, 1850. a G Chronometer time of transit. Planet — Star. Bar 'hermometers. 1 Object. A. B. 0. D. E. A a. A<5. Air. Wet. I 6 s. s. s. s. s. h. m. B. Rev. m. s. Rev. Inches. « - 1 Mars . . . N.P. 36.0 49.2 2.4 15.5 28.4 4 20 2.30 +5.00 28.144 67.6 54.9 2 Bessei ... 405 57.0 10.5 23.8 37.5 50.0 4 24 23.76 —5.96 —4 21.46 +10.96 ""her. alt. 3 Mare . . . S.F. 34.5 47.6 1.0 14.3 27.2 4 27 0.92 +4.75 68°. 3 4 Bessei ... 405 85. 0 8.5 21.5 35.0 48.0 4 31 21.60 -5.48 4 20.68 10.23 Bar. red. to 32° F. 28.037 5 Mars . . . N.P. 6.3 19.5 32.5 45.8 58.7 4 33 32.56 +5.82 6 Bessei ... 405 28.0 41.3 54.5 7.7 20.5 4 37 54.40 —5.22 4 21.84 11.04 7 Mars . . . S.F. 47.0 0.3 13.3 26.6 39.4 4 40 13.32 +5.10 8 Bessei ... 405 7.2 20.5 33.5 46.8 59.5 4 44 33.50 —5.06 4 20.18 10.16 9 Mars . . . N.P. 50.5 3.5 16.5 30.0 42.8 4 47 16.66 +6.21 10 Bessei ... 405 11.2 25.0 38.0 51.3 4.3 4 51 37.96 —4.87 4 21.30 11.08 11 Mars . . . S.P. 22.5 35.5 48.6 2.0 14.6 4 53 48.64 +5.57 12 Bessei . . . 405 42.0 55.5 8.5 21.8 34.5 4 58 8.46 —4.57 4 19.82 10.14 13 Mars . . N.P. 45.7 59.0 12.1 25.7 38.3 5 0 12.16 +6.63 14 Bessei ... 405 7.5 21.0 34.0 47.5 0.2 5 4 34.04 —4.48 4 21.88 11.11 15 Mars . . . S.F. 42.2 55.5 8.5 21.8 34.5 5 7 8.50 +5.93 16 Bessei ... 405 2.5 15.5 29.0 42.5 55.0 5 11 28.90 —4.19 4 20.40 10.12 17 Mars . . . N.P. 16.0 29.3 42.5 55.8 8.5 5 13 42.42 +7.01 18 Bessei ... 405 37.0 50.3 4.0 17.5 30.2 5 18 3.60 —3.97 4 21.18 10.98 19 Mars . . . S.F. 9.5 23.0 36.0 49.5 2.2 5 21 36.04 +6.29 20 Bessei ... 405 30.3 43.5 56.6 10.0 22.7 5 25 56.62 —3.79 4 20.58 10.08 21 Mars . . . N.P. 34.8 48.0 1.2 14.5 27.2 528 1.14 +4.40 22 Bessei ... 405 9.5 22.6 36.0 48.8 5 32 22.63 —6.57 4 21.49 10.97 23 Mars . . . S.F. 42.0 55.3 8.5 21.9 34.5 5 35 8.44 +3.59 24 Bessei . . . 405 15.8 29.0 42.4 55.0 5 39 28.95 —6.47 4 20.51 10.06 35 Mars . . . N.P. 4.5 17.5 30.5 43.5 5 43 17.40 +4.66 26 Bessei ... 405 12.5 26.0 39.0 52.2 5.2 5 47 38.98 -6.57 4 21.58 11.23 27 Mars . . . S.F. 40.5 53.8 6.8 20.3 33.0 5 51 6.88 +4.04 28 Bessei ... 405 1.0 14.5 27.5 41.0 53.5 5 55 27.50 —6.09 4 20.62 10.13 29 Mars . . . N.P. 1.7 15.0 28.0 41.5 54.7 5 59 28.18 +4.80 30 Bessei ... 405 24.5 37.5 4.5 17.0 6 3 50.63 —6.09 4 22.45 10.89 31 Mars . . , S.F. 8.4 21.5 34.5 48.0 0.5 6 12 34.58 +4.14 32 Bessei . , . 405 29.5- 43.0 56.0 9.5 22.0 6 16 56.00 —6.01 4 21.42 10.15 33 Mars ... N.P 0.5 13.5 26.6 40.2 52.8 6 20 26.72 +5.37 34 Besscl ... 405 22.7 36.0 49.2 2.5 15.3 6 24 49.14 —5.56 4 22.43 10.93 35 Mars . . . S.F 24.2 37.5 50.5 3.8 16.5 6 28 50.50 +4.31 36 Bessei ... 405 45.5 58.5 12.0 25.5 38.2 6 33 11.94 —5.64 —4 21.44 +9.95 Remarks. Although a tolerably favorable night, the measures are by no means fcatisi'actory. The comparing star is so extremely minute as to he obscured under light sufficient for proper illumination of the wires. I cannot think it above the lltli or 12th magnitude. Results. h. m. s. m. s. Rev. Mean N.P. . . Nine transits . . . 5 16 13.28 — 421.733 .... +11.021 .... =334.80 MeanS. P.. . . Nine transits . . .524 9.76 — 480.628. . . .+10.113. . . . es317.lt AT SANTIAGO DE CHILE. 71 .JANUARY 21, 1S5O— Continued. Results — Continued. h. m. Correction for chronometer at 5 16 . . m. s. . —1 13.16 Santiago sid. time N.P h. m. s. 5 15 0 12 Correction for chronometer at 5 24 . — 1 13.18 Santiago sid. time S.F . . 5 22 56 58 Interval . . 7 56 46 A P F. limbs in A. R. reduced to arc . ii . . 16.57 . 0 908 17 70 Variation of A. It. in 7m. 50s Observed P. F. diameter h. m. A p at 5 17 . . + 0.54 . . 17.11 . 0.23 Variation of declination in 7m. 56s. . Corr. for diam. of micr. wires . . . Observed N. S. diameter .... h. m. A pat 5 25 . — 0.27 — 2.20 15.23 . 0.21 JANUARY 93,1850. jr reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers A. B. C. D. E. A a. A,!. Air. Wet. V 1 s. s. s. s. 8. h m. s. Rev. m. s. Rev. Inches. • • i Mars . . . N.P. 50.5 4.0 17.5 30.5 43.2 4 10 17.14 +4.47 28.078 69.4 52.7 2 Bessel ... 405 • • 30.0 43.5 56.5 9.2 4 14 43.20 —4.11 —4 26.06 +8.58 Ther. att 3 Mars . . . 8.F. 48.3 1.5 14.7 28.0 40.6 4 17 14.62 +3.53 70°.0 4 Besse!*. . . 405 13.5 26.5 39.8 52.8 5.5 4 21 39.62 -^4.11 4 25.00 7.64 Bar. red. to 32° F. 27.965 5 Mars . . . N.P. 7.8 21.0 34.3 47.6 0.3 4 23 34.18 +4.77 6 Basse] ... 405 34.0 47.5 0.5 14.0 26.5 4 38 0.50 -3.91 4 26.32 8.68 7 Mars . . . S.F. 27.5 40.8 54.0 7.5 20.3 4 29 54.02 +4.01 8 Vessel . . . 405 .0 19.5 32.8 45.5 4 34 19.35 —3.66 425.33 J.67 9 Mars . . . N.P. 4.7 17.2 30.5 43.7 56.4 4 36 30.50 +5.20 10 Besfel . . . 405 30.5 43.6 56.6 10.0 22.6 4 40 56.70 —3.49 4 26.20 8.69 11 Mars . . . S.F. 24.5 37.8 51.0 4.3 17.0 4 42 50.92 +4.47 12 Bessel ... 405 49.8 3.2 16.3 29.6 42.4 4 47 16.26 —3.19 4 25.34 7.66 13 Mars . . . N.P. 40.6 53.5 6.8 20.3 32.8 4 49 6.80 +5.58 14 . . .405 6.0 19.2 32.3 45.8 58.4 4 53 32.34 —2.98 4 25.54 8.56 II Mars . . . S.F. 12.8 26.0 39.0 52.3 5.2 4 55 39.06 +2.83 16 Bessel ... 405 30.0 49.2 2.5 15.8 28.3 5 0 2.36 —4.86 4 23.30 7.69 17 Mars . . . N.P. 5.2 18.5 31.5 45.0 57.8 5 2 31.60 +3.87 18 Bcssel ... 405 32.3 45.5 58.8 12.0 24.7 5 6 58.66 —4.67 4 27.06 8.54 19 Mars . . . B.F. 4.5 18.0 31.0 44.4 57.0 5 931.18 +3.12 20 Bessel . '. . 405 30.3 43.5 56.6 10.0 22.8 5 13 56.64 —4.63 4 25.46 7.75 21 Mars . . . N.P. 21.7 34.8 48.1 1.5 14.3 5 15 48.08 +4.05 22 Besscl ... 405 48.5 1.8 15.0 28.0 40.8 5 20 14.82 -4.44 4 26.74 8.49 23 Mais . . . S.F. 0.5 13.5 26. 8 40.3 53.0 52226.82 +3.38 24 . . .405 26.5 .19.5 52.8 6.3 19.0 5 26 52.82 —4.39 4 26.00 7.77 25a Mars . . . N.P. 24.3 37.5 50.7 4.1 16.7 5 31 50.64 +4.30 26 Itfwl . . 405 50.4 4.7 17.7 31.3 44.0 5 36 17.00 —4.23 4 26.98 8.53 276 Mars . . . S.F. 28.0 41.3 54.5 7.8 90.7 5 38 54.46 +3.58 28 Bi'SrTl . . . 405 54.5 7.5 21.0 34.3 47.0 5 43 20.86 —4.10 4 26.40 7.68 S9c Mars . . . N.P. 8.0 21.3 34.4 47.7 0.5 5 45 34.38 +4.42 30 Bessel ... 405 35.0 48.2 1.5 14.8 •27.5 5 50 1 , 40 —3.97 4 27.02 8.39 31 Mars . . . S.F. 29.8 43.2 56.3 9.8 22.5 5 51 56. 32 +3.86 32 1 , . .405 56.2 D.I 22.5 35.8 48.3 5 56 22.43 —3.77 4 26.10 7.63 33 Mars . . . N.P. 22.5 35.6 48.7 2.0 14.6 5 58 48.68 +4.69 34 Bessel ... 405 48.8 2.5 15.5 38.9 41.5 6 3 15.44 —3.65 —4 26.76 +8.34 72 OPPOSITION OF MAES, 1849-50, JANUARY 83, 185O— Continued. £ ('liroiionii'U'r time of transit. Micr Planet— Star. riirriiinmeterM. 1 Object. A. B. C. D. E. A a. A t. Air. Wet. <£ 6 s. a. », B. s. 1 ll. 111. S. Rev. in. s. Rev. Inches. . 0 2 35 Mars . . . 8.F. 51.8 5.2 18.3 31.6 41.5 6 5 18.28 +3.97 28.078 69.4 52.7 36 Bessel ... 405 17.8 31.0 44.3 57.7 10.5 6 9 44.26 —3.55 —4 25.98 +7.52 Tlmr. att. 37 Mars . . . N.P. 33.2 46.2 59.5 12.5 25.2 6 11 59.32 +4.65 70°. 0 38 Beseel ... 405 0.0 13.1 26.3 39.8 52.4 6 16 26.32 —3.64 4 27.00 8.29 Bar. red. to :<•!' F. 27.965 39 Mars . . 8.F. 55.2 8.5 21.5 35.0 47.6 6 18 21.56 +4.09 ill Bessel ... 405 21.1 34.3 47.5 1.0 13.5 6 22 47.48 —3.50 4 25.92 7.59 41 Mara ... N.P. 37.5 50.7 3.7 17.2 30.0 6 25 3.82 +4.82 42 Bessel ... 405 4.5 17.8 30.5 44.0 57.0 6 29 30.76 —3.56 4 26.94 8.38 43 Mars . . . S.F. 9.5 22.7 35.8 49.2 1.9 6 31 35.82 +4.02 44 Bessel ... 405 36.0 48.8 2.0 15.2 27. 8 6 36 1.96 —3.52 4 26.14 7.54 45 Mare . . . N.P. 43.8 57.0 10.1 23.5 36.3 6 38 10.14 +5.01 46 Bessel ... 405 10.4 23.8 37.5 50.7 3.5 6 42 37.18 —3.36 4 27.04 8.37 47 Mars . . . S.F. 44.5 57.6 10.9 24.3 37.0 6 45 10.86 +4.17 48 Bessel ... 405 10.8 24.0 37.1 50.5 3.2 6 49 37.12 —3.37 —^ 26.26 +7.54 Remarks. Very favorable for observations. The great difficulty is with the very small star ; it was, however, a little more distinct than last night. a Very steady. c Beautifully steady. k Recorded 21.7s. at wire E. Mean N. P. . . Twelve transits . Mean S. F. . . Twelve transits . h. m. Correction for chronometer at 5 24 . . h. m. s. . 5 24 6.27 . 5 30 44.50 m. s. . —1 16. B8 Results. m. s. Rev. — 4 26.638 .... +8.487 . — 425.602 .... +7.640 . / u . . =2 45.42 . . = 2 28.90 ll. m. s. . . 5 22 49.39 1 16.90 . . 5 29 27 60 . . 6 38 21 A P. F. limbs in A. R. reduced to arc . Variation of A. R. in 6m. 3Ss. . . . . . 15.55 . . + 0.21 A N. S. limbs micr, in rev . 0.847 = 16.51 0.21 Observed P. F. diameter h. m. A f a'. 5 25 . . . . . . 15.76 . 0.18 Corr. lor diumrtiT of mier. wires . . Observed IV. S. diameter .... h. m. A o at 5 32 . — 2.20 14.10 . 0.16 JANUARY 33, 1850. 6 CJ Chronometer time of transit. Planet— Star. Tliermollirtrls. I U F __. | ^ Object. A. B. C. D. E. An. A a. Air. Wet. 1 s. s. 8. s. s. h. m. s. Rev. III. S. Rev. Inches. • • i Mars . . . N.P. 14.8 27.0 40.2 53.5 6.2 4 23 40.34 . +3.60 28.088 71.1 53.5 2 Bessel ... 405 55.0 7.5 . . 34.0 '4 28 7.84 —2.68 —4 27.50 +6.28 3 Mars . . . S.F. 26.8 40.0 53.3 6.5 19.5 4 30 53 22 +4.20 Tln'r. alt. 71". 0 4 Bessel . . . 405 53.5 6.5 19.6 32.8 45.8 4 35 19.64 —1.15 4 26.42 5.35 H;ir. red. IK '.<•>' !•'. 5 Mars . . . N.P. 20.2 33.0 46.4 59.5 12.1 4 37 46.24 +2.78 27.972 6 Bessel ... 405 47.5 0.5 13.8 27.3 40.0 4 42 13.82 —3.44 —4 27.58 +6.22 AT SANTIAGO DE CHILE. 73 JASTUARY 33, 1S5O— Continued. o Object. Cliroiiomt ter time of tnuisit. M' an of \\ ire> Micr. Planet— Star. Ear. Thermometers. A. B. C. D. E. Aa. Ac!. Air. Wet. s. s. S. 6. s. h m. s. Rev. in s. Kev. Inches. 0 • 7 M.irs . . . S.F. 19.5 m.s 45.5 58.5 11.2 4 51 45.44 + 1.23 28.088 71.1 53.5 8 1 . . .405 45.8 59.2 12.5 25.7 38.5 4 56 12.34 —4.13 —4 26.90 +5.36 9 10 Mars . . . N.P. Besstl ... 405 46.8 14.5 0.0 27.5 13.0 25.5 54.0 39.2 6.5 4 58 13.10 5 2 40.66 +2.47 —3.69 427.56 6.16 Ther. ntt. 71°. 0 Bar red. to 33° F. 11 Mars . . . S F. 29.8 43.0 56.2 9.5 22.3 5 4 55.26 +1.89 27.9,2 12 Bessel . . . 405 56.5 9.5 23.0 36.2 48.8 5 9 23.80 -3.5! 4 26.51 5.41 13 M.irs . . . N.P. 27.5 40.5 53.7 7.0 19.5 5 10 53.64 +2.9J 14 a l!i:--i.-l ... 405 . . 21.6 3'j.O 47.5 5 15 21.51 —3.33 4 27.90 6.25 15 Wars . . . S.F. 34.5 47.7 0.8 14.3 23.9 5 18 0.84 +2.21 Bessel . . . 405 1.3 14.5 27.7 41.0 53.6 5 22 27.62 —3.11 4 26.78 5.32 17 Mars . . . N.P. 0.6 13.9 26.9 40.4 53.1 5 24 26.98 +3.20 18 Bessel ... 405 28.5 41.5. 55.0 8.3 21.0 5 23 51.86 —1.99 4 27.88 6.19 Mars . . . S F. 47.9 1.0 14.3 ; 27.5 40.3 5 31 14.20 +2.53 20 lii-ssi-l ... 405 14.8 28.0 41.0 54.5 7.2 5 35 41.10 —2.78 4 36.90 5.31 M Mars . . . N.P. 2.5 15.5 28.5 42.0 54.6 5 37 28.62 +3.55 H Bessel ... 405 30.3 43.5 56.7 10.0 22.7 5 41 56.64 —5.55 4 28.02 6.10 >:t Mars . . . S.F. 14.0 27.5 10.5 53.8 6.5 5 43 40.56 +2.87 24 Bessel . . . 405 41.2 54.5 7.5 21.0 33.6 5 48 7.55 -2.45 4 27.00 5.32 25ft Mars . . S.F. 53.5 6.5 19.5 32.5 46.0 6 5 19.60 +2.77 26 Bessel . . . 405 20.5 46.5 59.7 13.0 6 9 46.59 — 2.59 4 25.99 5.36 27 Mars . . . N.P. 18.5 31.5 41.5 57.5 11.0 6 15 44.60 +3.44 28 Bessel ... 405 46.8 59.5 12.7 26.0 39.2 6 20 12.84 —2.69 4 28.24 6.13 29 Mars . . . N.P 38.3 50.5 4.2 17.2 30.5 6 23 4.14 +3.46 30 Bessel ... 405 6.3 18.5 32.5 45.5 58.5 6 27 32.26 —2.65 4 28.12 6.12 31 Mars . . . g.F. 40.5 53.5 6.5 19.5 33.0 6 30 6.60 +2.85 31 Bessel ... 405 7.5 20.3 33.5 46.8 0.0 6 34 33.62 —2.48 4 27.03 5.33 33 Mars . . . N.P. 9.9 22.5 36.0 49.0 2.5 6 37 35.98 +3.43 34 Bessel ... 405 38.0 50.8 4.2 17.3 30.5 6 42 4.16 —2.74 4 28.18 6.16 35 Mars . . . S.F. 51.5 4.0 17.4 35.5 43.7 6 45 17.42 +2.67 ye Bessel . . 405 18.9 31.5 45.0 58.0 11.5 6 49 44.98 —3.61 —4 27.56 +5.28 Remarks. There were no marked peculiarities in the observations of to-night. The star was seen somewhat more distinctly. a Recorded 22. 61. at wire C. 6 Telescope reversed. Results. h. m. s. m. B. Rev. ' it Mean N. P. . . Six transits . . .52 4.82 — 4 27.740 . . . +6.200 . . . . =2 0.84 Mean S.F. . . Six transils . . . 5 10 5.09 4 23.757 . . . 5.345 . . . . 1 44.17 Mean N.P. . . Three transits . . . 6 25 2S. 21 4 28.180 . . . 6.137 . . . . 1 59. 6D Mean S. F. . . Three transits . , . 6 26 54.54 — 4 27.190 . . . + 5.333 . . . . = 1 43.74 ii. m. h. m. B. h. m. b. m. B. Correction for chronometer at 5 2 . - 1 30.50 Correction for chronometer at 6 2.3 . . — 1 20.73 Correction for chronometer at 5 10 . — 1 20.53 Correction for chronometer at 6 27 . . — 1 20.71 5 0 44 ^ S.intiaiin sid. 6 24 7 54 Santiago sid. lime S. F 5 8 44.57 Santiago sid. time S. F 6 25 33.83 Interval . 8 0.25 Interval . 96.29 10 74 OPPOSITION OF MARS, 1849-50. JANUARY %3, 185O— Continued. Results — Continued. A P. F. limbs in A. R. reduced to arc Variation of A. F. in 8m Observed P. F. diameter .... 14.74 - 0.04 14.70 A N. S. limbs micr. in rev. . Variation of declination in 8m. Corr. for diam. of micr. wires . Observed N. S. diameti'r , 0.855= 16. B6 — 0.24 — 2.20 14. 22 A P. F. limbs in A. R. reduced to arc . . . 14.45 Variation of A. R. in 26s + 0.00 Observed P. F. diameter 14.45 A N. S. limbs micr. in rev. Variation of declination in 26s. Oorr. for diam. of micr, wires Observed N. S. diameter h. m. A f nt 5 3 A p at 5 11 h. in. 0.13 0.11 A pat 6 '. A p at 6 i , 0.814 = 15.88 — 0.01 — 2.20 13.65 /' . . .0.14 . o.ia JANUARY 34, 1850. to 6 a Chronometer time of transit. Planet — Star. Bar. Thermometers £ M £ b Object. A. 11. C. D. E. A a. A S. Air. Wet. .O 6 s. s. s. s. 8. h. m. s. Rev. m. s. Rev. Inches. 0 0 2 1 Mars . . . N.P. 32.4 46.0 59.0 12.7 25.4 4 18 59.10 +3 04 28.089 73.2 56.6 a Bessel ... 405 11.0 24.4 37.8 51.0 4 23 24.45 —0.93 —4 25.35 +3.97 Ther. att. 3 Mars . . . S.F. 45.8 59.5 12.5 25.5 39.0 4 40 12.46 +1.56 71°. 8 4 Bessel ... 405 24.3 37.3 50.7 3.6 4 44 37.35 —1.62 4 24.89 3.18 Bar. red. to 32° F. 27.971 5 Mare . . . N.P. 14.5 28.0 41.0 54.3 7.0 4 47 40.96 +2.78 6 Bessel ... 405 40.0 S3.5 7.0 20.2 33.2 4 52 6.78 —1.38 4 25.82 4.16 7 Mare . . . S.F. 37.0 50.3 3.4 16.7 39.5 4 54 3.38 +2.34 .8 Bessel ... 405 2.5 15.3 28.3 41.5 54.2 4 58 28.36 —1.03 4 24.98 3.37 9 Mara . . . N.P. 9.8 23.0 36.1 49.5 2.3 5 036.14 +2.28 10 Bessel ... 405 35.8 49.0 2.3 15.5 28.3 5 5 2.18 —1.77 426.04 4.05 11 Mars . . . S.F./ 52.5 5.8 18.8 32.2 45.0 5 7 18.86 +1.81 12 Bessel ... 405 17.5 31.0 44.0 57.2 9.7 5 11 43.88 —1.44 4 35.02 3.35 13 Mars . . . N.P. 4.3 17.4 30.5 43.8 56.5 5 13 30.50 +2.83 14 Bessel ... 405 30.2 43.3 56.4 9.8 23.5 5 17 56.44 —1.21 4 25.94 4.04 15 Mars . . . S.F. 24.3 37.5 50.5 4.0 16.8 5 19 50.62 +2.17 • 16 Bessel ... 405 49.5 2.6 15.7 29.1 41.6 5 24 15.70 —1.14 4 25.08 3.31 17 Mars . . . N.P. 38.5 51.8 4.8 18.2 31.0 5 26 4.86 +3.37 • 18 Bessel . . . 405 4.5 17.8 31.0 44.3 57.0 5 30 30.92 —0.68 4 26.06 4.05 19 Mars . . S.F. 3.5 16.8 29.8 43.2 55.8 5 32 29.82 +2.41 20 lii'sscl ... 405 28.3 21.7 54.6 8.0 20.6 5 36 54.64 —0.82 4 24.82 3.23 21 Mars . . . N.P. 33.5 -17.0 0.0 13.3 26.0 5 38 59.96 +1.37 22 Bessel ... 405 59.5 12.7 36.2 39.5 52.2 5 43 26.02 —2.66 426.06 4.03 23 Mars . . . S.F. 54.8 8.0 21.2 34.5 47.3 5 45 31.16 +1.13 24 Bessel ... 405 20.0 33.2 46.5 59.5 12.0 5 49 46.24 —2.04 4 25.08 3.17 25 Mars . . . N.P 10.6 S3. 8 36.8 50.3 2.8 5 51 36.86 +2.27 26 Bessel ... 405 26.6 49.8 2.7 16.2 36.9 5 56 2.84 —1.71 4 25.98 3.98 27 Mars . . . S.F. 46.5 0.0 13.0 26.4 39.1 5 58 13.00 +1.87 38 Bessel . . . 40i 11.5 25.6 38.2 51.5 4.3 6 2 38.22 —1.24 4 25.22 3.11 39 Mars . . . N.P. 13. 2 26.4 39.4 52.8 5.5 6 4 39.46 ' +1.79 30 llcr.si'1 ... 405 39.0 5-3.2 5.5 18.8 31.4 6 9 5.38 —2.24 4 25.92 4.03 31 Mars . . . S.F. 28.8 42.0 55.3 8.5 21.4 6 10 55.18 + 1.16 33 lie'- •••! . . 405 53.6 7.4 20.4 33.6 46.3 6 15 20.24 — 1.91 —4 25.06 +3.07 AT SANTIAGO DE CHILE. 75 JANUARY ti*, 1850— Continued. No. for rf-IVn.-nre. Object. Chronometer time of transit. Mean of wires. Micr. Planet- Aa. -star. Bar. thermometers. A. B. 0, D. E. Ai-l ... 405 Mars . . . N.P. 0.7 25.8 36.0 13.8 39.0 39.2 26.8 52 1 52.3 40.3 5.5 5.5 53.0 18.3 18.5 6 21 26.92 6 28 52.14 6 30 52.30 +1.07 —1.95 +1.47 4 25.22 3.02 Thi r. att. 71°.8 Bar. red. to 33° P. 27.971 38 Bessel ... 405 51.8 4.8 18.0 31.5 44.2 6 35 18.06 —2.47 4 25.76 3.94 39 Mars . . . S.F. 25.2 38.5 51.5 4.8 17.8 6 37 51.56 + 1.22 40 Bessel ... 405 49.9 3.0 16.4 29.9 43.5 6 42 16.34 —1.83 4 24.78 3.05 41 Mars . . . N.P. 58.2 11.5 24.8 37.8 50.8 6 44 24.62 +1.85 42 Bessel . . . •!():. 24.0 37.3 50.5 4.0 16.7 6 48 50.50 —2.06 4 35.88 3.91 43 Mars . . . S.F. 5.5 18.6 31.8 45.0 58.0 6 51 31.78 +1.25 44 Bcssel . . . 405 30.5 43.5 56.6 10.0 32.8 6 55 56.68 —1.84 —4 24.90 +3.09 Remarks. There has been hut one more favorable night since the commencement of observations — that of December 17. Both objects are sharply defined, and are entirely free from flickering motion. Whether the star is variable or not it would be difficult to pronounce, yet it has certainly been better seen during the last two nights. Mean N. P. . . Eleven transits Mean S. F. . . Eleven transits h. m. h. m. 8. . . 5 37 43 51 . . 5 45 39.53 s. 1 24 27 Results. m. B. Rev. — 4 25.868 .... +4.013 . . — 4 25.005 .... +3.177 . . / // . . =1 18.21 . . =1 1.93 h. m. s. 5 36 19 24 . . —1 24.29 . 5 44 15.24 7 56.00 A P. F. limbs in A. R. reduced to arc Variation of A. R. in 7m. 569. . . . i ibservfcd P. F. diameter .... n . . . 13.94 . . . — 0.32 . . . 13.62 A N. S. limb micr. in rev Variation of declination in 7m. 56s. Corr. tor diam. of micr. wires . . . it 0.836 = 16.29 — 0.23 — 2.20 13.86 h. m. A o at 5 26 . u . 0.06 b. m. A 0 at 5 38 n . 0.08 JANUARY 35, 1850. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. An A 7 13 15.14 11.29 8 Mars . . . S.P. • • 58.5 11.0 • • 7 14 10.99 5.82 55.85 5.47 9 Bessel ... 275 11.0 24.0 36.3 , . 7 15 36.32 11.421 10 Mars . . . S.P. 7.6 20.0 32.6 • • • • 7 16 32.62 5.914 56.30 5.51 11 Bessel ... 375 16.5 29.5 42.5 7 ig 43.05 11 821 12 Mars . . . S.P. 12.7 25.3 37.5 • • • • 7 19 37.T2 6.10 55.67 5.721 13 Hi'.-.-rl . . . 275 31.0 33.5 46.2 . , 7 21 46.11 11.961 14 Mars . . . S.P. 17.0 29.9 42.5 • • • • 7 22 43.35 6.411 56.24 5.55 15 Bessel ... 275 . , 11.9 24.5 . 7 24 24.44 12.18 16 Mara . . . S.P. 55 0 7.7 20.3 • * 7 25 20.21 6.521 55.77 5.651 17 Bessel . . . 275 35.4 47.5 0.5 . 7 27 0.35 12.38 18 Mars . . . S.P. 31.0 43.5 56.2 . . 7 27 56.12 6.70 55.77 5.66 19 Bessel ... 275 13.5 26.3 36.8 f f . 7 29 38.71 12.561 90 Mars . . . S.P. 9.5 22.0 34.8 • • • • 7 30 34.65 7.051 55.94 5.51 21 Besscl ... 275 20.5 34.5 47.0 . . , 7 32 46.55 12.921 22 Mars . . . N.F. 18.8 43.7 . . 7 33 43.86 6.50 57.31 6.421 i 33 Bessel ... 275 11.8 24.5 37.0 . . . 7 35 36.98 13.181 34 Mars . . . N.F. 8.6 31.2 33.8 • • • • 7 36 33.75 6.67 56.77 6.511 35 Bessel . . . 275 . 26.8 39.2 . . 7 3839.24 7.84 96 Mars . . . N.F. 10.5 23.5 36.0 • • 7 39 35.88 1.311 5(5.64 6.531 37 Bessel . . . 275 11.0 23.5 36.2 7 41 36.11 8.561 28 a Mars . . . N.F. 7.5 20.3 3-2.8 7 42 32.75 2.00 56.64 | 6.561 39 Bessel ... 275 13.3 25.8 38.5 7 44 38.38 8.681 30 Mars ...NT. 9.7 31.3 34.6 7 45 34.38 2.10 56.00 6.581 31 Bi'scel ... 275 45.5 58.0 10.5 . 7 47 10.55 8.91 32 Mars . . . N.F. 42.5 55.3 7.5 7 48 7.65 2.1)3 57.10 6.58 33 Bessel ... 275 52.0 4.5 17.2 7 50 17.11 9.08 34 Mars . . . N.F. 48.6 1.3 13.6 7 51 13.68 2.47 56.57 6.61 35 Bessel . . . 975 19.5 33.0 45.0 7 52 44.71 9.19 36 Mars . . . N.F. 16.2 28.8 41.3 • • • • 7 5341.32 2.591 56.61 6.591 37 Bessel ... 975 59.8 12.5 35.0 . . 7 55 24.98 9.411 38 Mars . . . N.F. 56.5 9.0 21.5 • • 7 56 21.55 2.77 56.57 6.641 39 Bessel ... 275 31.5 44.3 57.0 . 7 58 56.78 9.591 40 Mars . . . N.F. 28.3 41.0 53.5 7 59 53.48 3.91 56.70 6.681 41 Bessel ... 275 20.0 32.8 45.2 . t 8 1 4.VJ! 9.75 43 Mare . . . s.P. 28.5 41.0 8 940.99 3.79 55.78 5.96 43 Bessel ... 375 0.0 13.9 25.3 8 4 25.28 9.89 44 Mars . . . S.P. 56.2 8.5 21.0 8 521.12 3.93 55.84 . 5.96 45 Bessel . . . 275 13.5 36.0 38.6 8 7 38. SH 10.08 46 Mars . . S.P. 9.0 31.5 34.3 8 8 34.15 —4.08 +55.57 +6.00 88 OPPOSITION OF MARS, 1851-52, DECEMBER 19, 1851— Continued. B Chronometer time of transit. Planet — Star. Thermometers. I , . MJiir Bar. ! Object. A. B. C. D. E. A a. Aci. Air. Wei. & 6 B. 8. 8. s. s. h. in. s. Rev. s. Rev. Inches. o ° Z 47 Bessel . . . 275 14.5 27.0 8 10 26.99 —10.18 28.087 51.5 49.6 48 Mars . . . S.P. 57.2 9.7 22.5 8 11 22.35 4.14 +55.36 +6.01 Ther. att. 49 » Bessel ... 275 28.5 41.0 53.6 8 12 53.58 10.32 60°. 5 50 Mars . . . S.P. 24.0 36.5 49.0 8 13 49.05 4.23 55.47 6.09 Bar. red. to 32° F. 28.002 51 Bessel ... 275 26.2 39.0 51.4 8 16 51.41 10.40 52 Mars . . . N.F. 22.5 35.1 47.7 8 17 47.65 3.62i 56.24 6.77} 53 Bessel . . . 275 21.5 34.1 47.0 8 19 46.75 10.48i 54 Mare . . . N.F. 18.6 31.5 44.0 8 20 43.92 3.71 57.17 e.7T| 55 Bessel ... 275 49.2 2.0 14.5 8 22 14.45 10.58 56 Mars . . . N.F. 45.6 58.3 10.8 • • 8 23 10.78 3.76| 56.33 6.81} Sic Bessel ... 275 28.0 40.6 53.2 8 24 53.15 10.70| 58 Mars . . . N.F. 24.6 37.2 49.9 8 25 49.78 3.89 56.63 6.81} 59 Bessel ... 275 0.0 12.8 25.3 t t 8 29 25.25 10.86 60 Mars . . . N.F. 56.2 8.8 21.4 8 30 21.35 3.95$ 56.10 6.90} 61 Bessel ... 275 42.6 55.0 8.2 8 32 7.81 11.02 6!! Mars . . . S.P. 38.0 50.4 3.4 8 33 3.15 4.90 55.34 6.12 63 Bessel ... 275 48.0 0.5 8 35 0.49 11.14 64 Mars , . , N.F. 31.6 44.3 57.0 8 35 56.85 4.16 56.36 6.98 65 Bessel ... 275 23.5 36.0 48.5 8 37 48.55 11.33 66 Mara . . . S.P. 18.5 31.0 44.0 8 38 43.72 5.10 55.17 6.23 67 d Bessel ... 275 0.5 13.5 26.0 . 8 41 25.88 11.63 68 Mars . . . N.F. 57.0 9.5 22.0 • • • • 8 42 22.05 4.61 56.17 7.02 69 Bessel ... 275 35.5 48.3 1.0 8 44 0.61 11.72 70 Mars . . . S.P. 31.0 43.5 56.0 . . 8 44 56.05 5.42 55.24 6.30 71 Bessel ... 275 51.2 4.0 16.5 . 8 46 16.45 11.79} 72 Mare . . . N.F. 47.5 0.5 13.0 • • 8 47 12.88 —4.80 +56.43 +6.99} Remarks. At the commencement of observations both objects were flaring and very unsteady, the atmosphere being loaded with moisture, and its tempera- ture falling. a Image tolerably sharp. c sharp and steady. The white zone about the north b Very sharp, but not perfectly steady. pole of Mars distinctly visible and marked by a dark line, the zone appearing nearly one-sbcth of the di- ameter of the planet. d Recorded 8A. 34m. Results. Mean S. P. . . First ten transits h. m. f. . 1 18 7.71 Mean N. F. . . First.ten transits . 7 46 43.83 Mean S. P. . . Next five transits . 8 8 21.53 Mean N. F. . . Next five transit! . 8 23 34.70 Mean S. P. . . Last three transits . . 8 38 54.31 Mean N. F. . . Last three transits . . 8 41 50.59 h. m. Correction for chronometer at 7 18 . . m. s. . —1 21.46 Correction for chronometer at 7 46 . . . — ] 21.64 *. Rev. i H 4 56.044 . . . . +5.544 . . . . =148.05 56.691 . . . . 6.573 . . . . 2 8.01 55.604 . . . . 6.010 . . . . 1 57.13 56.494 . . 6 817 55.250 . . . . 6.217 . . . . 2 1.17 + 56.320 . . . . +6.998 . . . . =2 16.39 h. m. s. Santiago sid. time S. P. . . ... 7 16 46.25 Santiago sid. time N. F. ... ... 7 45 22.19 38 35.94 AT SANTIAGO DE CHILE. DECEMBER 1», 1851— Continued. Results — Continued. 89 A P. F. limbs in A. R. reduced to arc . . . 9.70 AN. S. limbs micr. in rev. . . . 1 029 20 05 Variationof A. R. in 28m. 3fi*. . . . . . . + 3.55 Variation of declination in 28m. 36«. — 4.24 Observed P. F. diameter .... . . . 13.25 Corr. for diam. of niicr. wires . . — 2.20 Observed N. S. diameter .... 13.61 h. in. m. s. h. in. s. Correction for chronometer at 8 8 . . . —1 21.70 Santiago sid. time S. P. Correction for chronometer at 8 23 . . . —121.74 Santiago sid. time N. F. Interval n A P- F. limbs in A. R. reduced to arc . . . 13.35 A N. S. limbs micr. in rev. . . . . 0.807=15.72 Variation of A. R. in 15m. 13*. . . . . . . + 1.91 Variation of declination .in 15m. 13i. — 2.25 Observed P. F. diameter .... . . . 15.26 Corr. for diam. of micr. wires . . — 2.20 Observed N. S. diameier . . . 11.27 h. m. >. h. m. s. Correction for chronometer at 8 38 . . . —121.78 Santiago sid. time S. P Correction lor chronometer at 8 41 . . . —1 21.79 . ii n A P. F. limbs in A. R. reduced to arc . . . 16.05 A N. S. limbs micr. in rev. . . . . 0.781=15.22 Variation of A. R. in 2«i 56s. . . . . . . + 0.3-2 Variation of declination in 2m. 56s. . — 0.44 Observed P. F. diameter .... . . . 16.37 Corr. for diam. of micr. wires . . — 2.20 Observed N. S. diameter . . 12.58 h. m. H h. m. „ A p at7 18 . . 0.10 A f at 8 23 . 0 10 A f at 7 46 ... . . . . 0.11 A f at 8 38 . . 0 09 A p at 8 8 . . 0.09 A p at 8 41 . 0.11 DECEMBER 20, 1S51. No. for reference. I >bject. Chronometer time of transit. Moan of wires Micr. Planet— Star. Bar. Tliermometers A. B. C. D. E. A a A 4. Air. Wei s. 8. s. s. s. h. m. s. Rev. III. B. Rev. Inches. «' • la Mare . . . S.F. 31.2 43.5 56.5 9.0 22.0 7 3 56.44 — 9.04 28.073 53.3 2 3 4 5 ll.'ss.-l ... 275 Mars . . . S.F. llrsscl ... 275 Mars . . . S.F. 45.5 44.5 58.2 23.0 57.0 20.5 10.8 35.0 9.7 23.2 48.0 22.2 46.0 36.0 0.5 7 5 20.66 7 14 10.74 7 15 . 7 19 9.63 + 5.87i — 9.61 + 4.90 —10.00 —1 24.22 1 24.58 — 14.91J 14.51 Tber. nit 60°. 4 Bar. red. lo 32° F. 27.990 6 ll.'~<,.| . . . 275 9.5 22.5 35.0 47.3 7 20 34.86 -f 4.46 1 25.23 14.46 7 Mars . . . S.F. 9.0 21.7 34.3 46.8 7 21 34.23 —10.26 Sb !:•.--. 1 ... 275 34.3 46.5 59.0 11.5 7 22 59.11 + 4.181 1 24.88 1 1. n; 9 Mars . . . S.F. 33.0 45.8 58.0 10. r> 7 25 58.11 -10.47 10 IVss.il ... 275 10.5 23.1 35.5 7 27 23. 02 + 3.&11 1 24.91 14.321 11 M;ir» . . . g.F. 32.8 45.5 58.0 10.5 7 29 57.98 —10.71 12 llessel ... 275 58.0 10.2 23.0 35.5 7 31 23.96 + 3.65 1 24.98 14.36 n Mars . . . S.F. 15.2 27.5 40.5 53.0 7 33 40. 33 — 10.92J 14 ... . 275 -1(1. 5 M.I 5.5 18.0 7 35 5.56 + 3.35 1 2:. 14.0! 15 Mars . . S.K. 6.0 16.5 31.0 43.5 7 38 31.03 —11.16 16 llesscl ... 275 31.5 44.0 56.8 9.0 7 39 56.61 + 3.06 14. 28 17 18c Mars . . . S.F. ... 275 8.0 33.5 20.8 46.2 33.3 59.9 45.8 11.2 7 11 33.36 7 42 5H.76 —11.47 + 2.78 1 95.50 14.25 19 Mars . . . S.F. 17. -i 39. B 42.0 54.6 7 4842.13 - 6.6.H oe ll.—i-i ... 275 42.5 55.2 8.0 20.5 7 50 ! . 7.4S -1 25.71 — 14. UJ 12 90 OPPOSITION OF MARS, 1851-52, DECEMBER 3O, 1851— Continued. i Chronometer time of transit. Micr. Planet— Star. Bur. TlK'rniometers. £ i £ Object. A. B. C. D. E. A a. A S. Air. Wet. 1 6- s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. 0 K 21 Mars . . . S.F. 59.0 11.5 24.0 37.0 7 52 24.16 — 6.82 28.073 53.3 51.0 22 Bessel ... 275 21.5 37.0 49.7 2.2 7 53 49.64 •f 7.26 —1 25.48 —14.08 Ther. an. 23 Mars . . . S.F. 35.0 37.6 50.2 2.5 ! . . 7 55 50.11 — 7.06J 60°. 4 24 Bessel ... 275 50.3 3.0 15.5 28.0 7 57 15. 41) + 7.04 1 25.38 14.104 Bar. red. to 32° F. 27.990 I 25 Mars . . . S.P. 25.2 37.5 50.5 3.0 8 1 50.33 — 7.66 26 Bebsel ... 275 51.0 3.5 16.0 28.5 8 3 16.04 + 6.39 1 25.71 14.05 27 Mars . . . S.F. 46.6 59.3 11.7 24.2 8 5 11.73 — 7.76 28 Bessel ... 275 12.5 24.9 37.5 50.0 8 6 37.51 + 6.23 1 25.78 13.99 29 Mars . . . S.F. 4.5 17.0 29.5 42.0 8 8 39.53 — 7.90 30 Bessel ... 275 30.8 43.3 56.0 8.3 8 9 55.89 + 6.06 1 26.36 13.96 31 Mare . . . S.F. 20.5 33.3 45.8 58.0 8 11 45.68 — 8.43 32 Bessel ... 275 46.0 58.8 11.2 23.8 8 13 11.24 + 5.50 1 25.56 13.93 33 Mars . . . S.F. 8.8 21.5 34.0 46.5 8 15 33.98 — 8.57 34 Bessel ... 275 47.0 59.8 12.0 8 16 59.58 + 5.36 1 25.60 13.93 35 d Mars . . . S.F. 5.2 17.5 30.4 42.8 8 19 30.26 — 8.69 36 Bessel ... 275 30.5 43.0 55.6 8.3 8 20 55.61 + 5.18J 1 25.35 13.87| 28.080 52.0 51.1 37 Mars . . . S.F. 37.2 49.5 2.2 14.8 8 23 2.31 -, 79 Ther. att. 38 Bessel . . . 275 3.0 15.5 28.0 40.5 8 24 28.04 + 5.03 1 23.83 13.82 59°. 5 Bar. red. 39e Mars . . . S.F. 48.8 1.5 13.5 26.5 8 27 13.86 — 9.03 to 32° F. 28.000 40 Bessel ... 275 14.8 27.5 40.1 S3. 5 8 28 40.01 + 4.82 —1 26.15 —13.85 Remarks. A most unfavorable night throughout ; at no time was the planet either well denned or steady ; and, consequently, the measures are not satisfactory, a Bad measures of both objects. d Best measures made to-ni»ht. 6 Recorded 7A. 23m. <• Fog and cloud ; star just visible ; entirely obscured at c Recorded 7A. 43m. meridian transit. Results. h. m. s. Mean S. F 7 48 54.29 h. m. Correction for chronometer at 7 49 . m s. Rev. — 1 25.401 . _ 14.173 111. 8. — 1 25.20 Santiago sid. time S. F. h. m. s. 7 47 29.09 h. m. A p at 7 49 . 0.23 DECEMBER 31, 1851. «3 " O Chronometer time of transi Planet— Star. Thermometers. £ Object. A. R. C. [). E. A a. Aci. Air. Wet. S o s. s. s. 8. s. h. m. s. Rev. m. s. Rev. Inches. • • 1 Mars . . . S.F. 21.7 34.5 46.8 59.5 12.2 6 38 46.94 — 4.27J ! 28.079 53.0 47.3 2 Bossel ... 275 2.5 If). 5 28.0 40.5 53.2 6 40 27.94 1.73 —1 41.00 — 2.54J Ther. att. 8« 4 Mars . . . S.F. Bcssel . . 275 30.8 2.5 33.6 15.0 46.2 27.3 58.8 40.0 11.5 53.6 6 43 46.18 6 44 27.48 4.57 -2.14* —1 41.30 —2.42} 61°. 0 Bar. red. to 33° F. 27.993 AT SANTIAGO DE CUILE. 91 DECEMBER ai, 1851— foulliiucd. i I'lirnunmi'tcr tune ol transit. Mlttf Planet— Star. 'rhlTIIIIIMlftcrs. M Object. A. B. 0. D. £. icr. — A a. 4* Bar. Air. Wet. c 8 8. 8. 8. 8. li. m. i. Rev. m. s. i Rev. Inches. • • 5 Mars . , . S.F. 18.8 31.2 43.5 56.2 9.0 6 46 43.74 — 4.96$ 28.079 53.0 47.3 6 Bi-ssul ... 275 0.0 12.5 25.0 37.8 50.5 6 48 25.16 2.50$ —1 41.42 -2.46 7 Mars . . . S.F. 57.5 10.0 22.5 35.2 48.0 6 50 22.64 5.26 Ther. att 61". 0 8 Bcssel ... 275 j 38.6 51.0 4.3 16.5 29.5 6 52 3.86 2.87$ 1 41.34 2.38$ Bar. ml. 9 Mars . . . S.F. 34.0 40.5 59.2 11.5 24.6 6 53 59.16 5.64 27.993 10 lifssel ... 275 15.5 28.2 40.5 53.2 5.8 6 55 40.64 3.30 1 41.48 2.44 11 a Mars . . . S.F. 24.0 36.8 49.3 1.6 14.5 6 57 49.34 "5.90 12 Bc.-sel . . . 275 5.5 18.0 30.5 43.0 55.6 6 59 30.53 3.52 1 41.28 2.38 13 Mars . . . S.F. 59.3 11.8 34.2 37.0 49.8 7 1 24.42 6.23 14 ilrss.M ... 275 41.0 6.3 18.8 31.5 7 3 6.27 3.92 1 41.85 2.31 15 Mars . . . S.F. 53.5 6.0 18.5 31.2 43.7 7 8 18.58 6.95 16 Bcssel . . . 275 34.5 47.8 0.2 12.6 25.3 7 10 0.08 4.65 1 41.50 2.30 17 Mars . . . S.F. 52.5 5.3 17.5 30.3 43.0 7 12 17.70 7.18 18 Bessel ... 275 34.2 46.8 59.6 12.0 24.5 7 13 5U.42 4.96 1 41.72 2.22 19 Mars . . . S.F. 29.5 42.2 54.8 7.3 20.0 7 15 54.76 7.48 20 Bcssel . . . 275 11.5 24.0 36.5 49.0 1.5 7 17 36.50 5.30 1 41.74 2.18 21 Mars . . . S.F. 19.4 31.6 44.3 56.5 9.5 7 19 44.26 7.76 • Bcssel ... 275 1.0 13.5 26.1 38.5 51.0 7 21 26.02 5.56 1 41.76 2.20 23 Mars . . . S.F. 47.5 0.2 12.8 25.5 7.25 0.20 8.40 24 lli-SM-1 ... 275 16.8 29.5 42.2 54.5 7.0 7 26 43.00 6.25 1 41.80 2.15 25 Mars . . . S.F. 33.3 46.0 58.5 11.0 23.5 7 28 58.46 —2.02 26 l'.(--si-l . . . 275 15.5 27.5 40.5 53.0 5.5 7 30 40.40 +0.10 1 41.94 2.12 27 Mars . . . S.F. 7.7 20.5 33.0 45.5 58.3 7 32 33.00 —2.07 28 ll,-..-rl . . . 275 49.5 2.5 15.0 27.5 40.1 7 34 14.92 0.05 1 41.92 2.02 u Mars . . . S.F. 9.0 21.6 34.3 46.6 59.2 736 34.14 3.39 30 Hi'sM'l ... 275 51.0 3.5 16.3 28.6 41.5 7 38 16.18 0.40 1 42.04 1.99 31 Mars . . . S.F. 53.5 6.2 18.8 31.2 44.0 7 43 18.74 2.69 32 ; . . .275 35.5 48.1 0.6 13.4 26.0 7 45 0.72 0.76 1 41.98 1.93 33 Mars . . . S.F. 16.0 28.6 41.2 53.5 6.3 7 46 41.13 2.86$ 344 lit-sscl ... 275 58.1 10.6 23.2 35.5 48.5 7 48 23.18 0.93$ 1 42.06 1.93 35 Mars . . . S.F. 12.0 24.6 37.0 49.5 2.5 7 50 37.12 3.09 36 Bessel ... 275 54.2 7.0 19.6 32.0 44.5 7 52 19.46 1.17 1 43.34 1.93 37 Mars . . . S.F. 13.3 25.8 38.4 50.8 3.5 7 57 38.36 4.05 38 Hi'ss.il ... 275 55.5 8.0 20.5 33.0 46.0 7 59 20.60 2.27 1 43.34 1.78 :«l Mars . . . S.F. 7.0 19.5 32.2 44.6 57.5 8 1 32.16 4.19$ 40 Hi-ssH ... 275 49.5 14.8 26.8 39.8 8 3 14.59 3.40 1 42.43 1.79$ 41 Mars . . . S.F. 44.0 56.8 9.3 21.8 33.4 8 5 9.06 4.35 42 . . .275 26.7 39.1 51.6 4.2 16.9 8 651.70 2.60 1 42.64 1.75 •13 Mars . . . S.F. 39.0 52.0 4.5 17.3 30.0 8 9 4.56 4.46 44 llrsM-1 ... 275 32.0 34.5 59.8 12.5 8 10 47.30 3.81 1 42.64 1.65 45 , Mars . . . S.F. 1.5 13.5 26.8 39.0 51.6 8 14 26.48 5.40 46 ll'-ss, 1 . . . 275 44.0 56.5 9.0 21.7 34.3 8 16 9.10 3.79 1 W.IW 1.61 IV Mar,. . . . ,-<.[•. 36.6 49.3 2.8 14.3 27.0 8 18 3.00 48 Brssi-l . . . i!7.') 19.2 32.0 44.5 56.8 9.5 8 19 II. l» 1 I-J.4II 1.65 49 M.II ... S.F. 17.5 30.5 43.0 55.5 8.0 8 tl 1 5.65J •'" 11. -,,| . . . 075 0.5 13.2 35.8 38.2 50.8 •:..70 —4.02 — l.frtj 92 OPPOSITION OF MARS, 1851-52, DECEMBER £1, 1851— Continued. 6 Chronometer limn oi 'transit. Plunet— Star. Thermometers. M f ' VI ' Bar. 1 Object. A. B. C. D. E. A a. 64, Air. Wet. £ 6 s. s. 8. s. 8. h. m. s. IU-V. n). s. Rev. Indies. O O Z 51 Mars . . . S.F. 45.8 58.5 11.0 23.5 36.3 8 25 11.02 — 5.72i 28.082 48.5 46.5 52 I'.l -rl ... 275 28.5 53.8 6.2 18.6 8 26 53.64 4.15J —1 42.62 —1.57 Thor. ntt. 53 54 Mars . . . S.F. Besscl . . . '2T.> 45.8 88. 8 58.5 54.2 23.8 6.5 36.2 19.0 8 29 11.08 8 30 53.99 5.90 4.28J I 42.91 1.6|i 60°. 5 liar. iril. to M" F. 27.977 55 Mars . . . S.F. 11.0 23.5 36.2 48.5 1.3 8 33 36.10 6.93J 56 Bessel ... 275 53.6 6.5 19.0 31.3 44.2 8 35 18.92 5.37 1 42.82 1.56t 1 57 Mais . . . SF. 6.3 18.6 31.3 43.7 56.7 8 37 31.33 6.91 58 Bessel ... 275 49.2 1.6 14.2 26.8 39.5 8 39 14.26 5.45 1 42.94 1.46 59 Mars . . . S.F. 36.8 49.3 1.6 14.3 27.0 841 1.80 6.93 60 Bessel ... 275 19.5 32.3 44.6 57.5 9.6 8 42 44.70 5.50 1 42.90 1.43 61 Mars . . . S.F. 25.0 37.6 50.3 2.6 15.3 8 44 50.16 7.00 62 Bessel ... 275 8.0 20.7 33.3 45.8 58.3 8 46 33.22 5.58 1 43.06 1.42 63 Mars . . . S.F. 47.0 59.5 12.1 24.6 37.3 8 48 12.10 7.I5J 64 Bessel ... 275 30.1 42.6 55.5 7.6 20.3 8 50 55.22 —5.75 —1 43.12 — 1.40J Remarks. Good images and tolerably steady all nijlit. The dark line bounding the north polar zone is not as distinct as on the nigiit before last, nor do I perceive the brownish-red portion on the southeast quarter of the planet. a Measures close. * Measures open. Results. I . m. s. MeanS. F. . . 7 44 20.61 in. s. — 1 42.144 Bev. . —1.945 0 37.91 h m. Correction for chronometer at 7 44 . m. s. -1 27.68 Santiago Mil. time S. F. h. m. s. 7 42 52.93 h. in. A f at 7 45 . 0.04 DECEMBER 32, 1851. A Chronometer time of transit. Planet— Star. Thermometers. c . Bar 1 Object. A. B. C. D. E. A a. At. Air. Wet. 6 d Z 8. s. s. B. s. h. in. s. Rev. m. s. Rev. Inches. • - 1 Mars . . P.P. 24. S 37.2 49.6 2.3 14.8 6 33 49.68 — 0.91 sn.KK 60.0 53.5 2 Bessel ... 275 26.0 51.3 3.6 16.5 6 35 SI .33 u.irSi —2 1.54 +10.25J 1 Ther. att. 3 Mars . . S.F. 19.5 32.2 44.6 57.2 9.9 6 38 44.68 1.351 S5°.4 4 Bessel ... 275 46.3 58.8 11.5 6 40 46.29 11.75 2 1.61 10.39J Bar. red. to 32° F. 27.860 5 Mars . . . S.F. 34.5 47.3 59.8 12.4 25.0 , 6 42 59.80 1.67 6 Besscl ... 275 36.1 48.3 1.5 26.8 6 45 1.31 13.12 2 1.51 10.45 7 Mars . , . S.F. 52.3 3.8 17.5 30.2 42.7 6 48 17.30 1.18) 8 Bessel . . .275 54.2 31 6 44.6 6 50 19.30 —12.75 —2 2.00 + 10.565 1 AT SANTIAGO DE CHILE. 93 l> K< K-il I!KU 33, 1851— Continued. ! | Chronometer time of transit. Mean of wire Micr Planet— Star. I'lu'Illl -ItT V & 1 Object. A. B. O. D. E. A a. A i. Bar. Air. Wei 6 s. s. s. s. s. 1). m. s. B*r. in. s. Rev. Inches. e • 9 Mars . . . S.P. 52.8 5.3 18.0 30.5 43.2 6 56 17.96 + 5.13 I7.9M 60.0 53.5 10 Bessel ... 275 54.2 7.5 20. 0 32.6 45.1 6 58 19.88 — 5.50 —2 1.92 +10.63 11 Mars . . . S.F. 14.5 26.8 39.5 52.0 4.6 7 0 39.48 + 4.76 Thr-r. ntt. 65°. 4 1-2 Bessel . . . 275 17.0 29.6 42.1 54.5 7.0 7 2 42.04 — 5.92 2 2.56 10.68 liar, red 13 Mars ... S.F 0.5 13.0 25.6 38.3 51.0 7 5 25.68 + 4.331 27.860 14 Hessel ... 275 3.2 15.6 28.2 40.8 53.5 7 7 28.26 — 6.33 2 2.58 10.651 15 Mars . . S.F. 43.3 54.8 7.5 20.1 32.8 7 10 7.50 + 3.99 16 Bi'sscl ... 275 44.3 9.5 22.0 34.6 7 12 9.40 — 6.70 2 1.90 10.69 17 Mar* . . . S.F. 30.5 43.0 55.5 8.0 20.8 7 14 55.56 + 3.45 18 Bessel ... 275 32.5 45.3 57.8 10.2 23.0 7 16 57.76 — 7.39 2 2.20 10.84 19 Mars . . . 8.F. 48.0 0.5 13.3 25.6 38.4 7 19 13.16 + 3.151 20 li.-s-rl ... 275 50.3 3.0 15.6 28.1 40.5 7 21 15.50 — 7.591 2 2.34 10.75 21 Mars . . . S.F. 9.0 21.8 34.3 46.8 59.4 7 23 34.26 + 2.86 90 Bessel ... 275 11.7 24.5 37.0 49.5 2.0 7 25 36.94 - 7.96 2 2.68 10.82 23 Mars . . . S.F. 41.5 54.0 6.5 31.7 7 28 6.56 + 2.51 24 Bessel ... 275 43.8 56.8 9.0 21.5 34.2 7 30 9.06 — 8.31 2 2.50 10.82 25 Mars . . . S.F. 41.5 54.5 6.8 19.5 32.3 7 33 6.92 + 5.69 36 llessi.-l ... 275 44.3 57.0 9.5 22.0 34.5 7 35 9.46 — 5.221 2 2.54 10.911 •J7 Mars . . . S.F. 46.8 59.5 11.6 24.5 37.0 7 37 11.88 + 5.26 28 lli'SM'l . . . 275 49.7 2.0 14.9 27.5 40.0 7 39 14.82 — 5.651 2 2.94 10.911 29 Mars . . . S.F. 5.0 17.8 30.3 42.7 55.5 7 41 30.26 + 5.01 30 Biwscl ... 275 7.7 20.5 33.0 45.5 58.2 7'43 32.98 — 6.02 2 2.72 11.03 31 Mars . . . S.F. 39.5 52.3 4.6 17.2 30.0 7 46 4.72 + 4-651 3-2 !'.'•"' -1 ... 275 42.5 55.2 7.5 20.2 32.8 7 48 7.64 — 6.371 2 2.92 11.03 33 Mars . . . S.F. 52.3 4.6 17.3 29.8 42.4 7 50 17.28 + 4.44 34 Bessel ... 275 54.6 7.5 20.1 32.6 45.0 7 52 19.96 — 6.65 2 2.68 11.09 35 Mars . . . S.F 29.2 41.6 54.3 6.6 19.3 8 0 54.20 + 3-30 36 Bessel ... 275 32.0 44.5 57.1 9.9 22.5 8 2 57.20 — 7.881 2 3.00 11.181 37 Mars . . . S.F. 4.5 17.0 29.5 42.2 54.7 8 7 29.58 + 2.74 38 Hi's.-<:l ... 275 7.5 20.3 33.0 45.1 57.8 8 9 34.74 — 8.481 2 3.16 11.221 30 Mars . . . S.F. 12.8 25.3 38.0 50.5 3.0 8 11 37.92 + 2.611 40 Bessel ... 275 15.7 28.5 41.0 53.5 6.0 8 13 40.94 — 8.63 2 3.02 11.241 4! Mars . . . S.F. 14.3 26.8 39.3 4.6 8 15 39.38 + 2.55 42 ll.-ssrl ... 275 17.5 30.2 42.7 55.2 7.6 8 17 42.64 — 8.79 2 3.36 11.34 43 Mars . . . S.F. 50.8 3.5 16.0 28.6 41.3 8 20 16.04 + 4.771 • 44 lli-.-si'l . . . 275 54.5 7.0 19.7 :i2.:j 44.9 8 22 19.68 — 6.59 3 3.64 11.361 45 Mars . . . S.F. 43.2 55.8 8.3 20.8 33.5 8 26 8.33 + 4.43 46 ft el. . . 275 46.5 59. 5 12.0 24.5 37.0 8 28 11.90 — 6.96 2 3.58 11.39 47 Mars . . . 8 F 14.6 27.2 39.6 -,.) o 4.9 8 30 39.70 + 4.37 48 !!''"'! ... 275 17.9 :iu.6 43.3 55.8 8.3 8 32 43. IK — 7.10 8 3.48 11.47 49 a Mars . . . S.F. 13.9 26.5 39.0 51.8 4.0 8 34 38.96 +4.28 27.950 50 llcssd . . . 2^5 17.5 30.3 4-J.6 55.5 7.8 8 36 42.74 —7.21 2 3.76 n.17 Ther. an. 51 a Mars . . . S F 14.8 27.3 40.0 52.. r. 4.4 +4. IS 61. '8 llussel ... 275 19.5 31.1 43.7 56. 2 8.8 8 40 43.86 —7.32 2 4.02 11.51 liar, rnl 27.861 53 Mars . . . S F. 13.5 26.2 51.0 8 4i 38.CO +4. 05 54 H.'-srl . . . 275 17.0 29.8 42.3 8 44 42.34 —7.35 —2 3.64 +11.60 94 OPPOSITION OF MAES, 1851-52, DECEMBER 38, 1851— Continued. Remarks. ATI extremely fine night, definition superb, and nintion steady. The line bounding the zone is evidently darken near the western limb, :ind the /.one it-elf apparently smaller than when lirsl sec],. There is no star in the place given in the Epliemcris, and an error of a minute in the declination was pn.bably made in liessel, or in the Washington observations. a Wavy motion in these two observations. Results. h. m. s. Mean S. F 7 39 13.53 h. m. m. s. Correction for chronometer at 7 39 . . . — 1 29.98 m. s. Jlev. — 2 2.730 . . . . + 10.975 . Santiago sid. linir S. F. = 3 33.1)0 h. in. s. 7 37 43.55 Af>at740 0.18 DECEMBER 33, 1851. Cloudy. DECEMBER 24, l*r,l. QJ V Chronometer time of transit. Planet— Star. Thermometers. 1 Wean of wires. Micr. Bar. 1 Object. A. B. c. D. E. A a. A (5. Air. Wet. 0 s. a. 8. s. s. h. m. s. Rev. a. Rev. Inches. „ , K 1 Mars . . . S.F. 14.0 26.8 39.2 51.6 4.3 7 25 39. 18 —2.97 28.070 57.7 53.3 2 25.5 7 26 25.50 1.27 —46.32 —1.70 Thcr. alt. 3 Mars . . . S.F. 6.6 19.2 31.3 7 28 31.61 3.15 64°. 0 4 Washington . . . 5.5 18.3 7 29 18.15 1.48 46.54 1.67 liar. red. to 32° F. 27.975 S Mars . . . S.F. 24.6 37.3 49.8 7 31 49.81 3.37 6 Washington . . . 11.0 24.3 36.2 • • • • 7 33 36.41 1.75 46.60 1.62 7 Mars . . . S.F. 37.0 49.5 2.3 7 36 2.21 3.62 8 Washington . . . 36.0 , 48.5 • • 7 36 48.50 1.99 46.29 1.63 9 Mars . . . S.F. 6.3 18.8 31.3 . 7 38 31.38 3.64 10 Washington . . . 52.5 5.3 17.6 • • 7 39 17.71 2.09 46.33 1.55 11 Mars . . . S.F. 26.8 39.5 52.0 7 40 52.01 3.84J 12 Washington . . . 13.5 26.3 39.0 7 41 38.85 2.26J 46.84 1.58 13 Mars . . . S.F. 15.8 28.5 41.0 7 42 41 .01 3.96 14 Washington . . , 2.5 15.3 28.0 • • 7 43 27.85 2.46i 46.84 1.49J 15 Mars . . . S.F. 58.5 11.0 23.5 7 45 83.58 4.09 16 Washington . . . • • 57.6 10.0 7 46 10.05 2.65 46.47 1.44 17 Mars . . . S.F. 50.8 3.5 15.6 7 49 \:i.*f 4.27 18 Washington , . 37.5 50.2 2.5 7 50 2.68 2.80 46 80 1.47 19 Mars . . .S.F. 11.5 24.0 37.0 . 7 52 36.75 4.45 20 Washington . . 58.3 11.2 23.6 7 53 23.fi:> 3.04 46.87 1.41 21 Mars . . . S.F. 44.0 56.6 9.2 7 55 9.18 4.65 22 Washington . . . 30.5 43.5 56.0 7 55 55.91 3.22 46.73 1.43 23 Mars . . . S.F. 58.4 Jl.O 23.5 7 57 23.55 4.75 24 Washington . . . 58.0 10.6 7 58 10.. "i5 3.34 47.00 1.41 • 25 Mars . . . S.F. 34.2 46.8 59.2 7 59 59.31 4.9(IJ 26 Washington . 22.0 33 fi 8 0 46. (j9 3.OU 47.38 1.341 27 Mars . . S.F. 20.2 BB.e 45.4 8 -' 5.H 28 Washington . , . I. a 20.0 32.6 8 3 32.M —3.98 — 47. ip —1.29 AT SANTIAGO DE CHILE. 95 ' — — DECEMBER 9*. 1851— Continued. No. for reference. Object. Chronometer time of transit. McniMtrwirch Hter. I'lauel— Star. liar. Th'TIIIOI,leter> A. B. c. D. E. A a. Hi. Air., Wet. i. 8. Rev. 8. Rer. Inehes. a . 29 30 Mars . . , S.F. Washington . . . 9.3 22.0 9.2 34.5 21.8 • • 8 5 34.51 8 6 21.75 —5.39 —47.24 —1.31 28.070 57.7 53.3 31 32 33 94 35 36 57 38 Mars . . . S.F. Washington . . . Mars . , . S.F. Washington . . Mars . . .S.F. Washington . Mars . . . S F. Washington . . . 15.3 8.0 55.5 37.0 35.5 28.0 15.0 20.5 7.5 49.8 37 0 40.7 27.8 33.2 20.5 . , 8 8 40.58 8 9 27.65 8 11 33.15 8 12 20.42 8 14 2.29 8 14 49.54 8 17 0.64 8 17 48.00 5.44 4.21} 5.60 4.34 5.65} 4.45 5.70} 4.53 47.07 47.27 47.25 47.36 1.23} 1.26 1.20} 1.171 Ther. att 64°. 0 liiir r«-il to as r. 27.975 35.5 0.5 48.0 39 Mars . . . S.F. .4.6 16.5 29.0 p 8 19 29.28 5.76 40 Washington . . 51.6 4.2 16.8 8 20 16.78 4.62 47.50 1.14 41 Mars . . . S.F. 44.0 56.7 9.2 8 22 9.21 6. -32 42 Washington . 41.3 56.5 8 22 56.65 5.11 47.44 1.11 43 44 45 46 47 Mars . . . S.F. Washington . 30.0 42.5 29.8 23.3 9.9 15.8 55.0 42.5 34. S 22.3 28.3 8 24 55.08 8 25 42.40 8 26 34.71 8 27 23.35 8 30 28.35 6.35 5.24} 6.47} 5.41} 6.52 47.32 47.64 1.101 1.06 Mars . . . S.F. Wa>hin"ton 9.5 Mars . . . S.F. 3.2 48 Washington . . . 51.0 3.0 16.0 ' - 8 31 15.92 5.47} 47.47 Kill: 49 Mars . . . S.F. 33.8 46.3 58.5 t f • 8 32 58.78 6.65 50 Washington . . . 21.5 34.0 46.8 8 33 46.68 5.57J 47.90 1.07} 51 Mars . . . S.F. 59.5 12.0 8 34 12.00 6.72 59 Washington . 47.3 59.3 8 35 59.55 5.66 47.55 1.06 53 Mars . . , S.F. 11.3 83.5 8 38 23.65 6.73 54 Washington . 46.5 59.0 11.6 8 39 11.61 5.70 47.96 1.03 55 Mars . . . S.F. 54.8 7.5 20.0 8 41 20.01 6.88 56 Washington . 452.6 55.5 7.6 8 42 7.81 5.95 47.80 0.93 57 Mars . . . S.F. 5.8 18.8 30.5 8 43 30.95 6.98} 98 Washington . 53.6 6.3 18.8 8 44 18.82 6.08 47.87 0.90} 68 Mars . . . S.F. 39.0 41.5 54.3 8 45 54.18 7.01 no Washington . 17.3 30.0 42.5 8 46 42.51 6.12 48.33 0.89 61 ! (H 83 64 Mars . . . S.F. Washington . 34.7 47.5 ar>.5 4.5 57.11 0.2 48.2 17.5 5.5 8 48 0.05 8 48 48.10 8 50 17.35 8 51 5.58 7.05 6.15 ?. OH -6.21 48.05 —48.23 0.90 —0.80} 27.970 54.0 53.5 Mars . . S.F. Washington . , 52.3 40.5 Remarks. • Definition of planet sharp; but its motion wavy throughout. Tin' comparing st.ir so very dim that it would bear only tin I. ;I-T |iu--il>le light, which rendered the contacts doubtful, and only second rale. Results. h. m. a. Mean S. F 89 37.67 h. HI. in. -. t'orrection for ehi.iii.inic Ic r at 8 9 . . . —136.17 h. in. s. liev. -47.234 . . . . —1. Sauting!) Hid. ti"i" S. [•'. . . . / ii . . =021.52 h. • . . 8 7 51.50 A ,, al H 9 0.02 96 OPPOSITION OF MARS, 1851-52, DECEMBER 25, 1851. No. for reference. Object. Chronometer time of tiansit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. AJ. Air. Wet. B. s. s. s. s. h. in. s. Rev. III. S. Rev. I-nches. • • 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 34 25 26 27 28 29 30 31 32 33 34 a 35 36 37 38 39 40 Mars . . . S.F. Washington . . . Mars . . . S F. Washington . . . Mars . . . S.F. 28.0 45.0 49.0 6.5 40.5 58.0 1.6 53.2 10.5 14.5 31.8 33.0 51 5 5.8 27.0 39.8 7 24 53.17 7 26 10.41 7 41 14.38 7 42 31.75 7 50 32.96 7 51 51.46 7 53 20.26 7 54 38.26 7 56 15.46 7 57 33.16 7 09 30.46 8 0 48.46 8 2 24.56 8 3 42.96 8 5 11.46 8 6 39.46 8 7 48.26 8 8 6.46 8 11 36.46 8 12 54.56 8 14 15.46 8 15 33.96 8 17 14.46 8 18 32.96 8 20 6.46 8 21 24.96 8 22 53.16 8 24 11.46 8 26 41.96 8 28 0.76 8 29 26.76 8 30 45.46 8 32 2.46 8 33 20.96 8 35 30.46 8 36 49.96 8 39 32.96 8 40 51.96 8 41 45.96 8 43 4.96 + 3.80 — 9.35 + 2.85 —10.65 + 2.34 — 11.27 J + 3.28 —11.41 + 2.061 —11.62 + 6.75 — 6.90J — 7.24 + 6.35 — 7.37 — 7.62 + 6.22 — 7.57J + 6.16 — 7.69 + 6.07J — 7.83 + 5.99 — 7.88 + 5.81 — 8.10J + 5.71 — 8.29 + 5.67 — 8.33i + 5.58 — 8.42 + 5.57 — 8.48 +5.49 -8.59 +5.35J —8.69 —1 17.24 1 17.37 1 18.50 1 18.00 1 17.70 1 18.00 1 18.40 1 18.00 1 18.20 1 18.10 1 18.50 1 18.50 1 18.50 1 18.30 1 18.80 1 18.70 1 18.50 1 19.50 1 19.00 —1 19.00 +13.15 13.50 13.69 13.68J 13.651 13.721 13.72 13.891 13.791 13.85 13.90J 13.87 14.00 14.00J 14.00 14.05 14.08 +14.04J 28.019 rher. att. 65° .6 Bar. red. to 32° F. 27.932 57.5 20.3 oo 3 Mars . . . S.F. 15.5 33.2 Mars S F 30.5 48.5 Mars . . . S.F. 24.6 43 0 11 5 29.5 Mare . . . S.F. 48.3 6.5 Mars . . S.F. 36.5 j . . 54.6 r . . Mars . . . S.F. 15.5 34.0 14 5 33.0 Mars . . . S.F. . . 6.5 . . 25.0 • • Mars . . . S.F. 53.2 11.5 • • 42.0 0.8 Mars . . . S.F. - 26.8 45.5 Mars ... S.F. 2.5 Washington . . . • 31.0 Mars . . . S.F. 30.5 50.0 Mars . . . S.F. 33.0 Washington . . . Man* . . . S.F. • l 52.0 46.0 5.0 Remarks. Definition good, but motion wavy as last night. There being no star in the place given in the Ephemeris, and the nearest being that observed last night, comparisons were made with it. They are not considered entirely satisfactory, for the same reasons. On recomnutation next day an error was atceitained m the calculated declination amounting to 20'. a Recorded 31s. at wire C. AT SANTIAGO DE CHILE. MECEMBEH 35, 1851-Conlliiii, cl. Sesidtt, h. in. s. McanS. F . 8 11 36.88 ll. 111. Ml. s. lY'iTi-ruon foi chronometer at 8 i2 . . — I 39.43 97 h. in. A|> at 8 11 m. s. RI,V. -1 18.390 . . . + 13.807 Siilitiiij;.) snl. time S. F. 0.22 4 ^9.1 h. m. s. 8 9 57.45 DECEMBER 36, lur.l. rence. Chronometer time of transit. Mean of wires Micr. Planet— Star. Thermometers. a Object. A. B. C. D. E. Bar. h A a. A 32° F. 5 Mars . . . S.F. . . 32.5 44.7 57.5 7 0 4). 83 +3.70} 27.886 6 Kumker . . 2800 ' • 28.5 41.7 53.5 7 2 41.22 —3.61 1 56.34 7.311 7 Mars . . . .S.F. 17.0 29.7 42.2 7 6 29.62 +3.02 8 Rumker . . 2800 13.5 26.0 38.5 7 825.98 —4.38 1 56.36 7.40 9 Mara . . . S.F. 27.5 40.0 52.5 . , 7 10 39.98 +9.77 10 Rumker . . 2800 24.0 37.0 49.2 • • 7 12 36.72 — 4.741 1 56.74 7.511 11 Mars . . . S.F. . . 17.0 29.6 42.3 . 7 15 29.62 +2.43 12 Rumker . . 2800 13.8 25.0 38.5 7 17 26.08 —5.0? 1 56.46 7.45 13 Mars . . . S F. 16.7 29.2 41.7 „ , 7 19 29.18 +2.211 14 Rumker . . 2800 13.5 26.0 38.5 7 21 25.98 —5.29 1 56.80 7.501 15 Mara . . . S.F. . .. 9.8 22.6 35.3 7 23 2-2.55 + 1.98 16 Rumker . . 2800 • • 7.0 19.5 32.0 • • 7 25 19.48 —5.65 1 56.93 7.63 17 Mars . . . S.F. . . 38.6 50.6 3.3 t 7 26 50.82 +1.791 18 ! Rumker . . 2800 • • 35.3 47.6 • • • • 7 28 47.71 —5.901 1 56.89 7.70 19 Mare . . . S.F. 5.0 17.7 30.3 7 30 17.65 +1.58 20 Rumker . . 2800 • • 2.4 15.0 27.5 7 32 14.95 —6.151 1 57.30 7.731 21 Mars . . . S.F. . . 44.6 57.3 9.8 7 33 57.22 +1.39 22 Rumker . . 2800 41.5 54.5 7.0 • • 7 35 54.33 -«.33J 1 57.10 7.721 23 Mars . . . S.F. 11.7 2J.3 36.8 7 37 24.25 + 1.23 24 Rumker . . 2800 9.2 21.6 34.0 7 39 21.58 -6.58 1 57.33 7.80 25 Mars . . . S.F. 54.0 6.6 19.2 7 41 6.58 +3.70 26 Rumker . . 2800 • • 51.5 4.0 16.6 7 43 4.02 —4.08 1 57.44 7.78 97 Mars . . . S.F. . . 33.3 45.8 58.3 , 7 44 45.78 +3.621 28 Rumker . . 2800 30.6 43.4 56.0 7 46 43.32 —4.27 1 57.54 7,891 29 Mara . . . S.F. 9.5 23.0 34.7 7 51 22.05 +3.35 30 Rumker . . 2800 7.5 20.0 32.6 • • 7 53 20.02 —4.61 1 57,97 7.96 31 Mars , . . S.F. . . 21.0 33.5 46.0 . 8 1 33.48 +2.704 32 Rumker . . 2800 19.0 31.5 44.0 • • 8 3 31.48 —5.34 1 88.00 8,041 33 Mars . . . S.F. 49.8 2.4 15.0 . t 8 5 2.38 +2,561 34 Rumker . . 2800 48.1 0.8 13.3 8 7 0,72 —5.51 1 38.34 8.071 35 Mars . . . S.F. 17.5 29.5 42.0 8 8 29,63 +2.495 30 Rumker . . 2800 • • 15.6 28.2 40.7 8 10 28,15 —5.63 1 38.50 8.051 :n Mars . . . S.F. 49.5 2.2 14.7 , , 8 12 2.12 +2.32J 38 Rumker . . 2880 48.0 0.5 13.1 • • 8 14 0.52 —5.80 1 58.40 8,121 39 Mara . . . S.F. . . 20.5 33.0 45.5 f f 8 15 32.98 +3.871 40 Rumker . . 2800 18.8 31.3 43.9 8 17 31.32 —5.92 1 58.34 8,191 41 Mars . . . S.F. 53.8, 5,5 18.0 8 20 5.42 +8.161 42 Rumker . . 2800 • • 51.5 4.0 16.6 • • 822 4.02 —6.10 I 58,69 8,261 43 Mars . . . S.F. _ ( 54,0 6.6 19.1 . 8 24 6.55 +2,03, 44 Rumker . . 2800 . . ! 52,5 5.1 17.5 8 26 5.02 —6,30 1 58.47 8,33 45 Mara . . . S.F. , . 20.8 33.3 46.0 , 8 27 33.42 + 1.93 46 Rumker . . S800 19.3 33.4 44.8 8 29 32..15 -6.451 —1 SO. 73 +8.401 100 OPPOSITION OF MARS, 1851-52, DECEMBER 2T, 1851— Continued. » Chronometer lime of transit. I'lani't— Star. Tlirmioineters. g M f 'rp - ^ £ Object. A. B. a n. E. A a. Ai. Air. Wet. jj c s. s. s. s. 8. h. in. s. Rev. 111. 9. Rev. Inches. • 0 K 4V Mars . . . S F. 16.0 28.6 41.3 . 8 31 28.62 +1.86i 28.011 56.0 52.9 48 a Rumker . . 2800 15.0 27.6 40.0 8 33 27.52 —6.60 —1 58.80 +8.46J IThw. alt. 49 Mars . . . S.F. 1.5 14.0 26.6 8 35 14.02 +1.83 64°. 0 SO Rumker . . 2800 . . 0.5 13.0 25.5 8 37 12.98 -6.62 1 58.96 8.45 Bar. red. to 32° F. 27.916 51 Mars . . . S.F. 32.0 44.5 57.0 8 38 44.48 +1.81 52 Rumker . . 2800 31.2 43.8 56.2 • ' 8 40 43.72 —6.72 —1 59. 21 +8.53 Remarks. There is evidently considerable haze, varying in density, though not enough to afiect the image of the planet prejudicially. Motion steady, and measures of the planet satisfactory; but the star is very dim. a Ju»t visible. Results. h. m. s. Mean S. F. . . Twenty-six transits . . 7 46 23.82 h m. m. s. Correction for chronometer at 7 46 . . . —146.23 m. s. — 1 57.5! Rev. . . . . + 7.872 . . Santiago sid. time S. F. h. m. A pat 7 46 0.16 . 2 33.42 b. m. s. 7 44 37.59 DECEMBER 28, 1851. 6 « Chronometer time of transit. Planet— Star. Thermometers. c Vf ' Micr. Bar. £ Object. A. B. c. D. E. An. A S. Air. Wet. a d f. s. s. s. s. , h. m. s. Rev. s. Rev. Inches. • 0 1 Bcssel . . . 275 . . , . 46.0 . . 7 12 45. S6 +3.56 28.051 54.7 50.4 2 Mars . . . S.F. 24.5 7 13 24.46 2.63 +38.50 —6.19 Ther. att. 3 Bessel ... 275 54.5 . 7 14 54.46 +3.26 63°. 0 4 Mars . . . N.P. 32.0 . . 7 15 31.96 —1.93 37.50 5.19 Bar. red. i.) :>•>' r. 27.959 5 Bessel ... 275 . . 59.5 . . 7 16 59.46 +3.09 6 Mara . . . S.F. 38.0 7 17 37.96 — 2.89J 38.50 5.98J 7 Bessel ... 275 . , 15.3 7 19 15.26 +2.85 8 Mars , . . N.P. • • 53.3 • • 7 19 53.26 —2.20 38.00 5.05 9 Bessel ... 275 . . 32.0 . , . 7 21 31.96 +2.69 10 a Mars . . . S.F. 6.8 7 22 6.76 2 25 34 80 5.94 11 Bessel ... 275 44.0 7 23 43.96 +2. 55J 12 Mars . . . N.P. • • 21.5 • • • • 7 24 21.46 —2.54 37.50 5.09i 13 Bessel ... 275 11.0 7 27 10.96 +2.32J 14 Mars . . . S.F. • • 49.3 7 27 49.26 —3.56 38.30 5.88J 15 Bessel ... 275 17.9 7 29 17.86 +2.14 16 Mars . . . N.P. 55.3 7 ^9 55 26 0 Rl 17 dn 4ne 17 Bessel ... 275 34.0 7 31 33.96 — ^.ol +2.02 o/ .'lU . yo 18 Mars . . . S.F. 12.2 7 32 12.16 —3.80 38.20 5.82 19 Bessel ... 275 . . 54.2 7 33 54.16 + 1.87J 20 Mars . . . N.P. • •- 31.0 • • 7 34 30.96 —3.034 36.80 4.91 21 Bessel ... 275 28.0 7 38 27.96 +1.46i 22 Mars . . . 8.F. 6.3 7 39 6.26 -4. iii +38.30 —5.58 AT SANTIAGO DE CHILE. 101 ;>!••.( KM HKll 38, 1851— Continued. 1 No. for reference. Object. Chronometer limi- nf ir;tn~it. Mcanofwiro Micr. Planet— Star. Bar. I'luTiiiinneterB. A. B. C. D. E. An. AiOO 36.80 35.60 36.20 35.40 36.60 +35.40 —4.82 5.65 4.811 5.61} 4.69 5.56 •1.0.-,; 5.47 4.62 5.40 4.56 5.39 4.50 5.37 4.44 5.35 4.47 5.29 4.36} 5.151 4.27 5.14 —4.22 28.051 Th<>r. att. 63°. 0 Kiir. ml. t., :ir i-\ 27.959 54.7 50.4 • • 21.8 40.2 18.0 41.0 17.8 • • 7 41 21.76 7 42 40.16 7 43 17.96 7 44 40.96 7 45 17.76 7 47 30.36 7 48 8.26 "7 49 38.26 7 50 14.56 7 51 41.56 7 52 19.16 7 53 39.46 7 54 15.96 7 56 22.36 Bessel . . . 275 Mars . . . S.F. llr.^.'l . . . 275 Mars . . . N.P. Besscl ... 275 Mais . . S.F • • 30.4 8.3 38.3 14.6 41.6 19.2 • . Besscl ... 275 Mars . . . N.P. Bessel . . . 275 • • 39.5 16.0 22.4 • • 0 3 Ilessel ... 275 Mars . . . N.P. Bessel ... 275 Mars . . . S.F. ' * • 18.0 54.3 13.0 50.3 7 1 • • • • 7 58 17.96 7 58 54.26 8 0 12.96 8 0 50.30 8 2 7.06 8 2 43.06 8 3 48.96 8 4 25.96 8 5 20.26 8 5 56.26 8 6 56.96 8 7 34.36 8 8 58.66 8 9 34.36 8 10 38.06 8 11 15.46 8 13 57.46 8 14 33.46 8 15 38.66 8 16 15.46 8 17 24.36 8 17 59.96 8 21 9.46 8 21 45.66 8 23 49.36 8 23 24.76 8 21 8 25 6.96 8 26 9.96 8 26 45.:«i Mars . . . N.P. 43 1 Bessel . . . 275 Mars . . . S.F. • ' • • 49.0 26.0 • • Besscl ... 275 Mars . . . N.P. Bessel ... 275 Mars . . . S.F. • • • • 20.3 56.3 57.0 34 4 • • • • 58 7 Mars . . . N.P. 34 4 Bessel ... 275 Mars . . . S.F. • • • • 38.1 15.5 • • Itiwl . . . 275 Mars . . . N.P. 57.5 33.5 • • Bessel ... 275 Mars . . . S.F. • • 38.7 15.5 l!i'-sd ... 275 Mars . . . N.P. • • 24.4 0.0 • • Besgel ... 275 • ' 9.5 45.7 • • Bessel ... 275 Mars . . . N.P. Ilessel ... 275 Mars . . . S.F. Ili'ssi'l . . . 275 Mars . . . N.P. • • • • 49.4 24.8 30.4 7.0 10.0 1.-..I 102 OPPOSITION OF MARS, 1851-52, DECEMBER 38, 1851— Continued. c5 B a Chronometer time of transit. Planet— Star. Thermometers. £ i z Object. A. B. 0. D. E. A a. A,J. Air. Wet. 6 e. s. s. s. s. h. m. s, Rev. s. Rev. Inches. • 0 Z 8 27 50.36 +1.73 38.051 54.7 50.4 70 36.8 8 28 26.76 — 3.35J +36.40 — 5.08| Ther. att. 71 ttessel ... 375 24.11 t t . . 8 29 23.96 + 1.71 63°. 0 72 Mars . . . N.P. . . 59.0 8 29 58.96 —2.55 35.00 4.26 Bar. red. to 3i° F. 27.959 73 Bessel ... 275 43.0 . . 8 31 42.96 +1.65J 74 Mars . . . S.F. • • 19.3 • • • • 8 32 19.26 — 3.37i 36.30 5.03 75 Bessel ... 375 . . 5.0 , 8 33 4.96 +I.60i 76 39.7 8 33 39.66 — 2.54J 34.70 4.15 77 Bessel ... 375 38.0 8 34 27.96 +1.60 78 Mars . . . S F. 4.5 8 35 4.46 —3.39 36.50 4.99 79 Bessel ... 375 55.0 8 35 54.96 +1.57 80 Mars . . . N.P. 30.0 • • 8 36 29.96 — 2.56i 35.00 4.13J 81 Bessel ... 375 , , 14 5 8 37 14.46 +1.58 82 Mars . . S.F. 50.5 8 37 50 46 — 3.4U 36.00 4.991 83 Bessel ... 375 46.7 8 38 46.66 +1.55 84 Mars . . . N.P. 31.6 8 39 21.56 —3.53 +34.90 —4.08 Remarks. Images sharp and steady, and measures satisfactory. The line bounding the white zone not so dark as when last observed. Dark patches visible on the south preceding quadrant. a Evidently in error, and therefore rejected. Results. Mean S. F. Mean N. P. Twenty transits Twenty-one transits h. m. Correction for chronometer at 8 1 . Correction for chronometer at 8 1 . h. m. s. . 8 0 35.54 . 8 0 42.12 m. s. . — 1 50.20 . —1 50.20 m. s. Rev. + 37.345 .... —5.447 + 36.167 . . . . —4.583 = 1 46.16 = 1 29.32 A P. F. limbs in A. R. reduced to arc . . . 17.67 Variation of A. R in 7s — 0.03 Observed P. F. diameter 17.64 h. m. A f at 7 58 •. 0.09 h. m. s. Santiago sid. time S. F - . . 7 58 45.34 Santiago sid. time N. P 75851.92 Interval 6.58 A N. S. limbs micr. in rev 0.864 = 16.84 Variation ot declination in 7s — 0.02 Corr. for diain. of micr. wires .... — 2.20 Observed N. S. diameter 14.62 h. m. A f> at 7 58 0.07 DECEMBER 29, 1851. P Chronometer time of transit. Planet— Star. Thermometers. £ \f f £ £ ,0 Object. A. B. C. D. E. A a. A, 1K.11 < onUnnrd. ol I Chrononiripr time of trai:>it. Planet— Slur. njcifrs .- B Object. A. B. C. D. E A a. Arl. Bar. Air. W«t £ s. 8. s. s. 8. ll III. s. Bar. „,, Rev. Inches. • • 3.) 36 Mars . . . N.P. R'jmkrr . . 2799 . . S6.6 7.5 9.3 20.0 21.7 33.6 823 9.15 8 27 20.02 +10.25 — 10.41J —4 10.87 +20.65J 28.040 54.5 52.3 37 Mars . . . S.F- 50.3 3.0 15.5 8 29 2.92 + 9.99 Ther. att 66°. 4 33 liumk.'r . . 2799 0.2 ia.e 35.3 8 33 12.75 —10.56 4 9.83 19.85 i'.nr nM tn3>° P. E9 Mars . . . N.P. 27.0 39.6 52.2 8 34 39.58 + 10.03 27.838 40 Rumkcr . . 2799 • 38.4 51.0 3.5 8 38 SO. 95 —10.71 —4 11.37 +30.74 Remarks. Fine night, linages f harp nnd clror ; bin a fn'sli wind from the northward occasionally created tremor in the. instrument. a Flaring and unsteady. 4 Steady and sharp again. Mfan S. P 1:. m. f. 7 3"> 2 05 Results. m. K. Rev. / n Mean N. P. h. MI. Correction for chronometer at 7 35 . . m. s. . —1 56.2S . . . =6 31. '(4 h. m. K. Correction for chronometer at 7 41 . . —1 56.26 A P. F. limbs in A. R. reduced to are . Variation of A. R. in 6m. 4s . . 21.01 . . 3 11 A N. S. limbs mier. in rev. . . . n . . 0.881 = 17.17 Observed P. F. diameter ... 17 90 Corr ford 'an h. m. A p st 7 35 . . . 0.13 Observed N. S. diameter . . . h. m. A pat 7 41 . . 13.48 it . 0.34 DECEMBER 31, 1851. No. lor reference. Object. Chronometer time of transit. Mian of wire* Micr. ri.inct— Star. Bar. Thermometers A. B. 0. D. E. A a. A*. Air. l\>t. 8. , e. 8. s. h. m. s. Rev. B. Rev. Inches. e a 1 2 Mars . . . S.F. Bessel ... 277 34.8 13.0 6 54 3J.76 6 55 12.96 —5.07 +7.s:* —38.20 —12.42} 27.975 61.4 52.0 3 4 S 6 Mars . . . N.P 41 0 0 58 40.96 6 57 19.76 6 58 58.76 6 59 35. S8 — -1.65 +7.10 —5.6!} +7.04 38.60 37.20 11.75 12.6?} Ther alt. 6*'. 4 Har.n-d. 27.B67 ... 277 Mars . . . S.F. Bebsel ... 277 • . 19.8 58.8 36.0 7 8 9 10 11 Mars . . N.P. Brssel ... 277 Mara . . . S.F . . 25.7 . . 4.2 8 2 • • 7 1 25.66 7 2 4.16 7 5 8.18 7 5 ' 7 8 3.46 7 841.96 --1.88} +6.77 —6.0?} —5.3) 38.50 37.40 -28.50 11.65} 12.12 • . . . 277 45 6 Mars . . . N.P. Bessel . . . 277 . . 35 . . . . 14 IOC OPPOSITION OF MARS, 1851-52, DECEMBER 31, 1851— Continued. No. for reference. Object. Clironnineur time of transit. 6:111 of wires. Micr. Planet— Star. , Bar. ^liermolnetert. A. B. c. D. E. A a. ArJ. Air. Wet. a. B. s. s. s. h. m. s. Rev. s. Rev. Inches. <• • 13 14 15 16 17 18 19 20 ill 22 23 24 25 26 27 28 29 a 30 31 a 32 33 34 35 36 37 38 39 40 41 43 43 44 45 46 47 48 49 50 51 53 53 54 22.3 7 10 22.26 7 11 0.46 7 12 43.96 7 13 22.76 7 15 46.26 7 16 24.16 7 18 48.26 7 19 27.46 7 21 17.26 7 21 55.36 7 23 58.06 7 24 37.76 7 26 10.96 7 26 49.46 7 28 15.46 7 28 54.46 7 30 15.26 7 30 54.46 7 33 9.26 7 33 49.26 7 35 15.46 7 35 53. 56 7 38 7.46 7 38 48.26 7 41 17.76 7 41 56.36 7 43 39.46 7 44 19.46 7 46 24.56 7 47 3.46 7 54 4.76 7 54 46.46 8 11 26.46 8 12 6.56 8 13 16.96 8 13 58. £6 8 15 15.56 8 15 55.96 8 17 31.96 8 18 13.16 8 S5 10.76 8 25 51 .46 —6.36 +6. 13J —5.31 +5.8&J —6.60 +5.674 —6.034 +5.45 —7.02 +5.27* —6.22 +5.14 —7.16 +4.994 —6.44 +4.87 —7.354 +4.744 —6.63 +4.49 -7.69 +4.314 —6.95 +4.2Si —7.92 +4.09 —7.12 +4.014 —8.10 +3.87 -7.7li +3.244 —9.06 +2.56 —8.82 + 1.891 —9.66 + 1.8« —9.09 + 1.6UJ —10.41 + 0.95 1 —38.20 38.80 37.90 39.20 38.10 39.70 38.50 39.00 39.20 40.00 38.10 40.80 38.60 40.00 38.90 41.70 40.10 41.60 40.40 41.20 »t —40.70 —12.49J 1 11.194 12.274 11.454 12.294 11.36 12.154 11.31 12.10 11.12 12.00J 11.204 12.01 11.134 11.97 10.96 11.62 10.714 11.54 10.694 —11.36 27.975 rher. att 68°. 4 Bar. red. to 3->° P 27.867 27.976 Ther. att 66°.0 Bar. red. to 3-3° F. 27.875 61.4 58.5 52.0 51 8 Bessel ... 277 Mars . . . N.P. Bessel ... 277 Mars . . . S.F. 0.5 • • 44 0 22.8 46.3 24.2 • Mars ... N.P Bessel ... 277 Mars . . . S.F. Bessel ... 277 Mars N P • • 48.3 27.5 17.3 56.4 • • 58.1 Bessel ... 277 37.8 11.0 • • Bessel ... 277 Mars . . . N.P. Bessel ... 277 Mars . . . S.F. Bessel ... 277 Mars N P 49 5 15.5 54.5 15.3 54 5 • • 9.3 Bessel ... 277 Mars 3 F • • 49.3 15.5 53.6 Mars N P 7.5 Bessel ... 277 Mars 3 F 48.3 17 8 Bessel . . . 277 Mars . . . N.I'. Bessel ... 277 56.4 • • 39.5 19.5 24.6 Bessel ... 277 Mars . . . N.P. 3.5 4.8 • • Besei'l . . 277 Mars . . . S.F. Bessel ... 277 Mars . . . N.P 46.5 26.5 6.6 i7 0 Bessel ... 277 Mars . . . S.F. 58.6 15.6 Bessel ... 277 Mars . . . N.P. Bessel ... 277 Mars . . . S.F. \ • • 56.0 32.0 13.2 10.8 Beesd ... 277 51.5 Remarks. Fine m«ht. Images clean and steady. There is PO little difference in right ascension thai desirable. Observations P topped by breakage of pin in universal joint of riplit asrention rod. a Wavy. measures are made hastily, and not so well as is AT SANTIAGO DE CHILE. 107 DECEMBER 31, Ib31 -Contluu.-cl. Results. Mean N P h. rn. F. 7 31 31 21 P. Rev. Mean S. F . 7 32 40 30 h. m. Correction for chronomoter at 7 31 . m. s. . —1 58.42 h. in. s. 7 29 32 39 Correction for chronometer at 7 32 . . . —1 58.43 A P. F. limb* in A. K. reduced tn an- , Variation of A. R. in 1m. 9s . . 17.28 . . —0.63 . . 16.63 A N. S. limbs rnicr. in rev. . . Variation of declination in 1m 9v. n . . 0.8-26 = 16.10 . . — 0.30 2 20 h. m. A p at 7 30 0.30 Observed N. S. diameter . h. m. A p at 7 31 . . 13.60 n . 0.21 JANUARY 1, 1852. i Chronometer time of transit. Micr. Planet— Star. Bar. Thermometers. I Object. A. B. C. D. E. A a. AJ. Air. UYt. 6 8. s. ft. s. 8. h. m. s. Rev. m. s. Rev. Inches. 0 • Z 1 Mars . . . S.F. 39.8 52.5 5.0 7 3 52.43 -4.71 37.955 61.3 54.7 2 Bessel ... 277 10.3 23.5 36.0 7 5 33.27 +2.25 —1 30.84 —6.96 Ther. att. 3 Mars . . . N.P. 23.0 35.5 48.3 7 8 35.57 -4.14 68° .3 4 Bessel . . . -277 55.0 7.6 30.3 7 10 7.60 + 1.84* 1 32.03 5.964 Bar. red. to 32° F. 37.848 5 Mars . . . S.F. . . 0.5 13.5 36.0 . . 7 12 13.33 —5.35 6 Bessel ... 277 31.8 44.5 57.0 • • 7 13 44.43 + 1.54 1 31.10 6.89 7 Mars . . . N.P. 43.6 56.5 9.0 7 15 56.37 — 4.6-2J 8 Bessel ... 277 • • 16.1 38.6 41.0 • • 7 17 28.57 +1.331 1 32.20 5.96 9 Mara . . . S.F. 16.8 39.8 43.3 7 3229 63 —3.08 10 Bessel . . . 277 48.1 0.6 13.5 7 24 0.73 +3.60 1 31.10 6.68 H Mare . . . N.P. 14.8 37.7 40.3 7 25 37.60 —2.68 12 Bessel . . . 277 47.6 0.0 13 6 7 27 0.07 +3.19 1 32.47 5.87 13 Mars . . . S.F. 22.4 34.8 47.5 7 28 34.90 —3.56 14 Beimel . . . 277 • • 54.0 6.5 19.2 7 30 6.57 +3.03 1 31.67 6.59 15 Mars . . . N.P. SI .3 33.8 47.0 7 31 34.00 —3.93 1ft • Bessel . . . 377 . • 54.0 6.5 19.2 • • 7 33 6.57 +1.87J 1 33.57 5.804 17 Mars . . . S.F. 35.2 48.0 0.3 7 34 47.80 —3.904 1 18 Besscl . . 277 7.0 19.6 33.2 7 36 19.60 +3.66 1 31.80 6.56i 19 Mare . . . N.P. 2.5 15.3 37.5 7 39 15.10 —3.31 SO Bessel ... 277 35.8 48.4 1.0 7 40 48.40 +2.39 1 33.30 5.70 31 Mare . . . S.F. 18.2 30.6 43.4 . 7 42 30.73 —4.36 S3 Bessel ... 277 50.5 3.3 15.8 • • 744 3.17 +2.02 1 33.44 6.38 33 Mara ... N.P 22.0 34.5 47.2 7 45 34.57 -3.50 U Bessel ... 277 . • 55.5 8.0 20.5 . . 7 47 8.00 +3.084 1 33.43 5.5SJ 25 Mare . . . S.F. 56.3 8.6 21.3 7 49 8.70 —4.244 26 Iliv-i'l . . . 277 38.5 41.1 53.6 75041.07 +2.13 133.37 6.364 37 Mara . . . N.P. 59.1 11.5 34.0 7 6-.' 11.53 -3.77 S3 ll«-"i'l ... 277 . . 33.0 45.5 58.2 75345.57 +1.67 1 34.04 5.44 39 Mare . . . S.F. 19.0 31.6 44.3 7 5531.63 —4.76 30 Bessel . . . 277 53.1 4.6 17.0 • • 7 57 4.57 + 1.43 —1 33.94 -8.19 108 OPPOSITION OF MARS, 1851-52, JANUARY 1, 1S5£ -Continue el. ;j Chronometer time of transit. Micr. Planet — Star. Bar. Therm". • .V s Object. A. li. p. D. E. A a. A rj. Air. Wet. 6 S. , ! : S. s. ll. in. s. Rev. m. s. Rev. Inches. 0 „ z 31 Mars . . . N P. . . 17.2 29.8 43.4 7 58 29.80 — 3.91J 27.972 59.8 54.3 32 Bcssel ... 277 . . 51.3 4.0 16.6 8 0 3.97 + 1.40 —1 31.17 — 5.31-j ThiT. all. 33 Mars . . . S.F. 15.2 27.8 40.3 8 1 27.77 —4.844 64°. 5 34 Bessel ... 277 48.4 1.0 13.5 8 3 0.97 + 1.32 1 33.20 6.1CJ Bar rrcl. to 3-2° F. 27.876 35 Mars . . . N.P. . . : 30.8 43.5 5B.O 8 4 43.43 —0.62 36 Bessel ... 277 6.3 18.0 30.5 8 6 18.27 +4.47 1 34.84 5.29 37 Mars . . . S.F. 49.0 1.7 14.3 8 8 1.67 -1.674 38 Bessel . . 277 23.5 35.1 47.6 8 9 3.J.U1 +4.39 1 33.40 6. OH 39 Ma-s ... N.P 42.5 55.0 75 . . 8 10 .15.00 —0,954 40 Bessel ... 277 • • 17.0 29.7 42.1 8 12 29.60 +4.27 1 34.60 5.22i 41 M irs . . . S F. 47.5 0.2 12.6 8 14 0.10 — 1.85 42 Bessel ... 277 21.0 33.0 •16.2 8 15 33.60 +4.19 1 33.50 6.04 43 Mars . . . NP. 49.5 2.0 14.7 8 17 2.07 —1.06 44 Bessel ... 277 24.5 37.0 49.7 8 18 37.07 +4.12 1 35.00 5.18 45 Mara . . . P.F. 48.0 0.7 13.5 8 21 0.73 —1 .»8i 46 Bessel ... 277 • • 23.0 34.6 47.0 8 22 31.53 +3.93 1 33.80 5.914 47 Mars . . . N.P. . 12.6 25.3 37.8 8 24 25.23 -I.WI 48 Besstl ... 277 47.6 0.5 13.0 8 26 0.37 +3.fi2i' 1 35.14 4.99 49 Mars . . . S.F. 17. 1 29.8 42.3 8 27 29.71 2.02 5D Bessel ... 277 51.4 4.0 16.5 • • 8 29 3.97 +3.721 1 34.24 5.744 51 Mara . . . N.P. 8.0 20.5 33 2 8 30 20.57 —1.25 52 Bessel ... 277 • • 43.2 56.0 8.5 8 31 55.90 +3.694 1 35.33 4.944 53 8.6 21.0 33.5 8 33 21.03 2_i() 54 Bessel . . 277 • • 42.5 55.3 7.8 • . 8 34 55.20 +3.t4 1 34.17 5.74 55 Mars . . . N.P. t f 1.1 13.6 26.3 8 36 13.67 —1.23 56 Bessel ... 277 • • 36.6 49.2 2.0 • • 8 37 49.27 +3.60 1 35.60 4.83 57 Mars . . . S F. :)9.8 52.4 4.8 . 8 38 55.33 —2.04 58 Bessel ... 277 • • 14.3 26.8 39.3 • • 8 4U 26.80 +3.63 1 34.47 5.67 59 Mare . . . N.P. 19.5 32.0 44.6 8 41 33 03 . | ng 60 Bessel ... 277 • • 55.0 7.7 20.2 . . 8 43 7.63 +3.57 —1 35.60 —4.83 Remarks. Superb night, and very satisfactory measure*, a Micrometer recorded 2.87J rev. Results. h. m. s. m. s. Rev. / ;/ Mean 8. F. . . 7 54 13 50 _ j JJ3 736 6 264 2 o Qg Mean N. P. . . 7 .17 29.10 — 1 34.021 . . . -5.397 . ... 1 45.19 il. in. m. s. h. m. 9. Correction for chronometer at 7 54 . — 2 1.09 . . . 7 52 12.48 Correction (or chronometer at 7 57 . . —2 1.02 . 7 55 28 08 ... 3 15.60 it n A P. F. limbs in A. R. reduced to arc . . 19.27 A N. S. limbs micr. in rev. . . . . 0.867=16.90 Variation of A. R. in 3m. J6» .... . . — 1.89 Variation of declination in 3?rt. 16s. . . — 0.85 Observed P. F. diameter . . 17.38 Corr. for diarn. of micr. wires . . . . — 2.20 Observed N. S. diameter . . . . . 13.85 h.m. it h.m. ;/ A f at 7 53 . 0.10 A o at 7 53 . 0.09 AT SANTIAGO DE CHILE. 109 JANUARY 3, is.vj. "or reference. Object. Chronoiiieler time of transit. - MeauoHvir,* . Micr. i -Star. Bar. T!,,rn,on,eters. A. B. C. D. E. A a Ac!. Air. We 6 s. 6. s. s. s. h. m. s. Rev. m. s. Rev. Inches. • • 1 2 Bessel ... 275 Mars . . . S.F. 13.6 50. H 26.5 3.0 39.0 16.0 t 6 24 26.37 6 27 3.27 +5.59 3.47 +2 36.90 —2.12 37.948 63.5 56.2 3 Bessel ... 275 17.5 30.2 43.2 6 30 30.30 5.15 Tlnr. att RS° 7 4 . . . N.t'. . . 53.0 5.6 18.4 6 33 5.67 3.91} 2 35.37 i nil Bar. red. •** to 3i° F. 5 Bessel . . . 34. :i 47.0 59.5 t t 6 31 46.93 4.78} j 27.839 6 Mars . . . S.F. 10.6 23.5 36.0 6 37 23.37 3.68 2 36.44 2.10} 7 Bessel ... 275 1.3 13.5 26.5 6 39 13.77 4.33 8 Mars . . . N.P. 36.3 49.5 1.5 6 41 49.10 3.26 2 35.33 1.07 9 ... 275 . . 11.8 21.4 37.6 . 6 43 24.60 3.98 lu Mars . . . S.F. . . 48.2 0.6 13.3 6 46 0.70 2.07 2 36.10 1.91 11 liessel ... 275 . 25.5 38.0 50.6 6 47 38 03 12 •Vuis . . . N.P. 0.5 13.0 25.5 6 50 13.00 3.60 2.53} 2 34.97 1.06} 13 l!es>cl . . . 275 30.6 43.3 56.0 6 51 43.30 3.26 14 Mars . ... cj.F. 6.6 19.2 31.8 • • 6 54 19.20 1.48 2 35.90 1.78 13 . . . 275 . . 50.0 2.6 15.2 6 56 2.60 2.99 16 Mars . . . N.P. . . 37.0 49.5 6 58 36.94 2.07 234.34 0.92 17 Bcssel . . . 275 . 59.5 12.0 24.5 7 0 12.00 2.64 18 34.8 47.4 0 0 1 CI t-r Al\ 19 Bessel ... 275 3.0 15.5 28.0 1 V 47. 40 7 4 15.50 1 .02 2.17} 2 35.40 1.62 30 •Vtais . . . N.P. 36.8 49.4 2.0 7 6 49.40 1.43} 2 33.90 0.74 21 Bessel ... 875 13.4 25.8 38.4 f 7 8 25.87 2.01} 32 Mars . . . S.F. • • 48.0 0.5 13.5 • • 7 11 0.67 0.50 334.80 1.51} U Bessel . . . 275 9.5 22.2 34.8 7 14 '.'2.17 6.46} 24 43.0 55.8 8.5 • • 7 16 55.77 5.89 233.60 0.57} 35 Bessel ... 275 12.5 25.0 37.5 7 18 25.00 6.22} 26 Mars . . . S.F. 46.8 59.3 11.9 7 20 59.33 4.84 2 34.33 1.38} •J? Bessel ... 27.3 10.5 2:j.O 35.6 t g 7 M 23.03 5.97} 28 Mara . . . Np. 43.8 56.4 9.0 • • 7 34 56.40 5.44 2 33.37 0.53} 39 lie*--''! ... 275 5.5 18.0 30.5 . 7 26 18.00 5.70} 30 Mars . . . S.F. 39.5 52.0 4.5 7 28 52.00 4.44 2 34.00 1.26} n Bessel ... 275 . 28.6 41.3 54.0 7 33 41.30 5.32} 32 Mars . . . N.P. 1.5 14.0 26.6 7 36 14.03 5.00 3 32.73 0.32} 33 Bessel ... 275 2.3 15.0 27.5 7 38 14.93 5.13 34 Mars . . . S.F. • • 36.0 48.6 1.2 7 40 48.60 4.0-2} 2 33.67 1.10} 35 Itessel ... 275 . 58.3 11.0 23.6 7 4-2 10.97 4.94 • 36 Mars . . . N.P. 30.8 43.5 56.0 7 44 43.43 4.71 2 32.46 0.23 37 Besisel . . . 275 6.2 18.8 31.3 7 46 18.77 4.69 38 Mars . . . S.F. . . j 39.5 52 2 4.6 7 48 52.10 3.72 2 33.33 0.97 39 . . 275 1 8.1 20.6 7 50 8.07 4.34 40 Murs . N P 40.3 52 8 7 52 40 23 4 25 •.' . • J . 1 i . 0.09 41 . . 275 . . j -15.0 57 5 10 0 7 53 57.50 4.27 42 Mars . . . H.F. . 18.0 30.6 43.2 7 56 30.60 3.45 3 33.10 0.83 43 . . . a;., 41.0 53.5 6.2 . 7 57 53.57 4.14 44 Mars . . . N.J.. • • 12.5 35.1 37.8 8 0 25.13 4.14 3 31.56 0.00 45 Bessel . . . 41.5 54.3 6.8 . 8 1 54.20 3.97 46 Mars . . S.F. 14.4 27.0 39.6 8 4 37.00 +3.17 +232.80 —0.80 110 OPPOSITION OF MARS, 1851^52, JANUARY 3, 1853-Contiuued. r i Chronometer time of transit. Mean of wire^. Micr Planet — Star. Thermometers. Bar i £ Object. A. B. C. D. E. A a. Aii. Air. Wet. £ d s. s. 8. s. s. h. m. s. Rev. m. s. Rev. Inches. „ 0 2 47 Bessel ... 275 33.7 46.5 59.0 8 5 46.40 +3.80$ 27.944 58.0 55.3 48 Mars . . . N.P. . . 5.1 17.8 30.4 8 8 17.77 3.90 +2 31.37 +0.09$ i Ther. atl. 49 Bessel . . . 275 i . . 32.8 45.5 58.0 8 9 45.43 3.65 68°. 0 50 Mars . . . S.F. ! . . 5.5 17.9 30.3 . . 8 12 17.90 2.S9 2 32.47 —0.66 Bar. red. t.i 32° !•'. | 27.835 51 Bessel ... 275 21.8 34.1 47.0 8 13 34.3(1 3.58$ 52 Mars . . .N.P. 52.8 5.4 18.0 8 16 5.40 3.81$ 2 SI. 10 +0.23 53 Bessel . . . 275 f t 9.0 21.6 34.3 8 17 21.63 3.50 54 Mars . . . S.F. 41.0 53.5 6.2 8 19 53.57 2.95$ 3 31.94 —0.54$ 55 Bessel ... 275 . 58.8 11.5 24.1 8 21 11.47 3.35 56 Mars . . . N.P. 29.5 42.2 54.6 8 33 43.10 3.68 2 30.63 +0.33 57 Bessel ... 375 49.0 1.8 14.3 8 25 1.70 3.27 58 Mars . . . S.F. 30.6 33.3 46.0 S 27 33.30 2.77 2 31.60 —0.50 59 Bessel ... 275 35.5 48.3 0.8 8 28 48.20 3.20 60 Mars . . . N.P. 4.8 18.5 31.0 8 31 18.10 3.68 2 29.90 +0.48 61 Bessel ... 275 33.5 36.1 48.8 . 8 32 36.13 3.18$ 62 Mars . . . S.F. 54.8 7.5 20.0 • • 8 35 7.43 3.82$ 2 31.30 —0.36 63 Bessel ... 275 32.6 35.3 47.8 8 35 35.23 3.14 64 Mars . . . N.P. • • 52.6 5.3 17.8 8 39 5.23 +3.69 +3 30.00 +0.55 Remarks. Night and observations same as preceding. Results. h. m. a. m. a. Rev. / ,. -f- 2 34.005 .... 1.216 _ o 23,70 Mean N. P . 7 37 48 61 -f-2 32.674 .... 0.319 — 0 6 22 h. m. m. s. h. m. s. Correction for chronometer at 7 33 . . . — 2 4.24 . . 7 31 18 04 Correction for chronometer at 7 37 ... — 2 4.25 . . 7 35 44 36 Interval ... . . 4 26 32 A P. F. limbs in A. R. reducpd to arc ... 19.96 A N. S. limbs mie. in rev . 0.897=17.48 Variation of A. R. in 4m. 26s — 2.72 Variation of declination in 4m. 26*. . — 1.18 Observed P. F. din meter . .... 17.94 Corr. for diam. of mior. wires . . . — 2.20 Observed N. S. diameter .... 14.10 h. in. // h. m. V ^ 0 at 7 30 o 02 A p at 7 34 n nn JANUARY 3, 1853. Cloudy. AT SANTIAGO DE CHILE. Ill JANUARY 4, ls.v>. £ Chronometf r time of transit. Mean of \\ i > • Mi — Planet— Star. Thermometer* 1 Object A. B. 0. 0. E. A a. A 4 Bar. Air. UVt c a. s. * in. .-• Rev. Inches. la Mars . . . tf.F. . . ' 47.6 0.3 13.5 25.7 6 35 0.46 +4.69 K.OM 58.5 55.0 2 H.C. . . , 18133 , . 15.0 28.0 40.5 53.3 6 40 27.88 —1.781 —5 27.42 +6.471 Mars . . .N.P. •31.0 33.5 '46.0 58.5 11.5 6 42 46.10 +4.97 Ther. att. 65". 7 4 H.C. . . . 18132 49.8 2.5 15.2 97.8 40.5 6 48 15.16 —2.47 5 29.06 7.44 Bar. red. in 3-2° F. 27,996 5k Mars . . . S.F. 35.5 48.2 1.0 13.6 26.5 6 50 0.96 +3.32 6 H.C. . . . 18132 3.5 . 16.5 29.0 41.7 54.5 6 55 29.04 —3.351 528.08 6.571 7 Mars . . . N.P. 9.0 21.6 34.3 46.8 59.6 6 57 34.24 +3.72 8 H.O. . . . 18132 38.5 51.0 3.8 16.6 29.5 7 3 3 88 —3.87 529.64 7.59 9 Mars . . . S.F. 18.8 31.5 44.0 M.J 9.5 7 8 44.06 +2.24 10 H.C. 18132 48.0 0.5 13.5 26.0 38.5 7 14 13.30 4 cfti 5 29 24 a fini 11 Mars . . . N.P. 9.7 2-3.7 35.3 47.9 0.5 7 16 35.22 t.OOf +2.61 u.V^l 12 11. C. . . . 18132 40.5 : 53.2 6.0 18.5 31.3 722 5.90 —5.34 5 30.68 7.95 13 Mars . . . S.F. 25.6 38.2 51.0 3.5 16.4 7 33 50.92 +1.41 14 H.C. . . . 18132 55.5 8.1 21.0 33.6 46.2 7 29 20.88 —5.751 529.96 7.161 15c Mars . . . N.P. 5.2 17.8 30.5 43.3 56.0 7 31 30.56 +1.90 16 H.C. . . . 18132 36.5 49.5 3.0 14.6 27.4 7 37 2.00 —6.14 5 31.44 8.04 17 Mars . . . S.F. 41.6 54.2 6.8 19.5 32.3 7 39 6.88 +0.81 18 H.C. . . . 18132 12.0 24.7 37.5 90.3 3.0 7 44 37.50 —6.62 5 30.62 7.43 19 Mars . . . N.P. 20.3 33.0 45.6 58.0 1P.O 7 46 45.58 +4.36 90 H.C. . . . 18133 52.5 5.0 17.8 30.4 43.2 7 53 17.78 —3.84 5 32.20 8.20 21 Mars . . . S.F. 38.6 51.3 3.5 '16.5 29.4 7 54 3.86 +3.17 22 H.C. . . . 18132 )().:( 33.0 35.8 48.2 0.8 7 59 35.62 —4.39 5 31.76 7.56 23 rf Miirs . . .N.P. 1.9 14.6 27.3 39.9 52.6 8 1 27.26 +3.83 24 H.C. . . . 18132 34.6 47.5 0.3 13.0 25.8 8 7 0.24 —4.761 532.98 8.58J 2> Mars . . . S.F. • 33.2 45.8 58.5 11.0 23.8 8 8 58.46 +2.80 •id n c isiaji 5.0 18.0 30.5 4.1 a 56.0 8 14 30.54 —5.02 5 32.08 7.82 Mars . . . N.P. 5.6 18.5 31.5 44.2 57.0 8 16 31.36 +3.39 28 H.C. ... 18132 52.5 5.2 17.8 30.5 | 822 5.18 —5.33 533.82 8.72 29 Mars . . . S.F. 35.5 51.2 4.0 16.5 39.5 8 24 3.94 +2.52 98.089 54.7 52.0 30 H.C. . . . 18132 11.5 24.2 36.8 49.3 2.0 8 29 36.76 —5.501 5 32.82 ' 8.021 Ther att 64'.6 31 Mars . . . N.P. 51.0 3.6 16.5 29.0 41.8 8 32 16.38 +3.34 Bar. red. 32 H.C. ... 18132 j 25.1 38.0 50.8 3.5 16.3 8 37 50.74 —5.63 —5 34.36 „ o- to 32° F. +8-96 27.992 Remarks. a Flaring. t Flaring and tremulous. c Sharp. d Steady. All following measures flnx. Mean S. F. . . . . . h. in. s. 7 30 28 70 Results. m. s. Rev. — 5 30.217 . . . +7.247 . . — :> 31.773 . . . +8.186 . . / n . . =931.34 . . = 3 39.54 h. m. fl. . 7 28 18.00 Mean N.P . 7 38 10.84 li. in. Correction for chronometer at 7 30 . Correction for chronometer at 7 38 . . A P. F. limbs in A. R. reduced to arc . Variation of A. R. in 7m. 42». . . . Observed P. F. diameter h. m. A D at 7 SI m. s. . —2 10.70 . —2 10.72 // . . 22.89 . . — 5.23 . . 17.66 . 0.13 . . 7 36 0.12 . . 743.19 A N. S. limbs micr. in rev. . . . Variatinii nl ilcclination in 7m. 4-2*. . Coir, lordiam. ol mii-r. Hin-i . . . Oh»i-rv»d N. S. di iim'ter .... h. m. A 0 at 7 :« . 0.939=18.30 — 3.14 — 2.20 13.96 . . . .0.14 112 OPPOSITION OF MARS, 1851-52, JAUTUARY 5, 1853. o a • Chronometer lime of transit. Planet— Star. I1- r Thermometers 1 M Object. A. B. C. I). E. A a. At. Air. Wet. 6 s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. ° • I Mars . . . S.F. 15.5 28.2 41.0 7 4 28.23 + 3.02 2S.021 | 71.5 58.7 2 Vessel ... 278 2.5 28.0 7 6 15.26 +13. <-,,,itiini4-.l. Results. • h. in. s. in.s. Rev. / // Mean S. F. . . . Ten transits . . . 7 44 19.72 — 1 48.ai6 . . . —10.381 . . =320.43 Mean \. I*. . . . Ten transits . . . 7 48 54.70 — 1 50.084 9 446 li. in. m. s. = 3 4.10 h. m. s. Correction for chronometer at 7 44 . —2 13.44 7 42 6 98 Correction for chronometer at 7 49 . — 2 13.48 Santiago aid. time N. P . . 7 46 41 33 it A P. F. limbs in A. R. reduced to arc . . . 18.42 A N. S. limbs micr. in rev. . . . . 0,838=16.33 Variation of A. K. in 4m. 35s . . — 3.25 Variation of declination in 4m. 35s. . — 1.28 Observed P. F. diameter . . 15.17 Corr. fnr diam, of micr. wires , — 2.20 Observed N. S. diameter ... . . 12.85 li. in. n h. m. n A p at 7 43 . . . 0.19 A a at 7 48 . 0.16 JANUARY 6, 1853. « n Chronometer time of transit. Planet— Star. Thermometers. s • »1 r'ui of wires Micr. Bar. £ Z Object. A. B. C. D. E. Ao 6.1 Air. Wet. 6 B. s. s. s. s. h. m. s. Ecv. m. B. Rev. Inches. e • 1 Bessel ... 278 19.5 3-2.2 45.0 57.5 10.2 7 12 4J.88 +2.95i 27.929 65.0 56.4 2 Mara . . . S.F. 3.5 15.8 28.5 41.2 54.0 7 15 28.60 —1.31 +2 43.72 — 4.271 Ther. alt. 3 Bessel ... 278 23.5 35.2 48.0 0.6 13.5 7 17 47.96 +2.49 69°. 7 4 Mars . . . N.P. 17.6 30.3 42.9 55.6 7 20 30.27 — 0.85i 2 42.31 3.341 Bar. red. to 3-2° F. 27.817 5 Bessel ... 278 39.0 51.6 4.2 17.0 29.9 7 23 4.34 +2.25 6 Mars . . . S.F. 22.0 34.6 47.3 0.0 13.0 7 25 47.38 —1.78 2 43.04 4.03 7 Bessel ... 278 15.0 28.0 40.7 53.3 6.0 7 27 40.60 +2.07 S Mars . . . N.P. 56.9 9.5 22.3 35.0 47.7 7 30 23.38 —1.13 2 41.68 3.20 9 Bessel ... 278 49.2 1.7 14.0 26.8 73-2 1.60 +1.70 10 Mars . . . S.F. 18.5 31.2 43.7 56.5 9.3 7 34 43.84 —2.18 2 42.24 3.88 11 Bessel ... 278 2.0 14.7 27.5 40.2 53.0 7 36 27.48 + 1.5-2 12 Mars . . . N.P. 43.2 56.0 8.6 21.2 34.0 7 39 8.60 —1.50 2 41.12 3.02 13 Bessel ... 278 49.4 2.2 14.7 27.5 7 41 2.12 + 1.32 14 Mars . . . S.F. 18.5 31.4 44.3 56.5 9.6 7 43 44.06 —2.44 241.94 3.76 15 Bcssel ... 278 54.0 7.2 20.0 33.0 45.7 7 46 19.98 +0.89J 16 Mars . . . N.P. 47.6 0.7 13.5 26.4 7 49 0.72 —1.94 2 40.74 2.831 17 Bessel ... 278 26.5 39.0 51.6 4.5 17.5 8 851.83 1.91 18 Mars . . . S.F. 7.2 19.6 32.5 45.2 58.0 8 11 32.50 5.18 2 40.68 3.27 19 Bessel ... 278 5.0 17.8 30.5 43.2 56.0 8 13 30.50 2.04 SO Mars . . . N.P. 44.3 57.0 9.8 22.5 35.2 8 16 9.76 4.50 2 39.26 3.46 21 [!i -ssr-1 ... 278 42.4 55.3 7.9 20.5 33.3 8 18 7.88 2.074 32 Mars . . . S.F. 22.6 35.3 48.0 0.6 13.5 8 20 48.00 5.24} 2 40.12 3.17 23 Bessel ... 278 30.8 43.8 56.5 8.6 21.5 8 22 56.28 2. Hi 24 M»rs . . . N.P. 9.6 22.4 35.2 47.8 0.5 8 25 35.10 4.45i 2 38.82 2.31 25 Bcgsel ... 278 4.0 16.8 29.5 42.5 55.0 8 29 29.56 2.23 H Mars . . . S.F. 43.5 56.0 8.6 21.5 34.3 8 32 8.78 5.29 2 39.22 3.06 27 Bessel ... 278 20.0 32.6 45.8 58.5 11.2 8 34 45.62 2.24 28 Mars . . . N.P. 58. S 11.2 24.0 36.5 49.3 8 37 23.90 4.40 9 38.28 9.18 29 Ressel ... 278 50.0 2.6 15,5 28.2 8 39 2.74 2.33 30 Mars . . . S.F. 16.5 29.2 42.0 54.3 7.2 8 41 41.84 5.18 2 39.10 3.89 31 Bessel ... 278 53.0 5.6 18.4 31.5 8 43 5.79 2.28J 33 Mars . . . N.P. 18.2 30.8 43.5 56.0 9.0 8 45 43.50 -4.30 +2 37.71 —2.0IJ 15 114 OPPOSITION OF MAES, 1851-52, JANUARY 6, 1853— Continued. Remarks. Until the total eclipse of the moon, although both objects were sharp and without tremor, their images were dim. At no time during the eclipse could a distinct shadow be seen on the moon; and its color, varying in patches at different times as though passing through pen densities, was from that of a light to a dark red copper. Results. h. in. s. m. s. Rev. , „ Mean S. F. . . . Eight transits . . . 7 58 14.37 + 2 41.257 .... —3.537 . . . . 1 8.94 Mean N. P. . . . Eight transits . ..82 59.27 + 2 39.990 .... —2.668 . . . . 0 52.00 h. m. m. s. h. m. s. ~ CD — 2 16.63 7 55 57.74 Correction for chronometer at / DO . Correction for chronometer at 8 3 . . . — 2 16.64 8 0 42.63 4 44.89 „ n A P. F. limbs in A. R. reduced to arc . . . 19.00 A N. S. limbs micr. in rev 0.856=16.94 Variation of A. R. in 4m. 45s. . . ... — 3.51 Variation of declination in 4m. 45s. — 1.38 O iserved P. F. diameter .... . . . 15.49 Corr. for diam of micr. wires . . . — 2.20 Observed N. S. diameter 13.36 K m. n h. m. i/ A o at 7 55 .... .... 0.07 A p at 7 69 . . . 0.04 JABTUARY 7, 1858. oj u Chronometer time of transit. Mtcr. Planet— Star. Bar. thermometers. & £ Object. A. B. C. D. E. A a. A<5. Air. Wet. _ 0 s. Hi s. s. s. li. m. s. Rev. m. s. Rev. Inches. 0 0 z 1 Bessel ... 278 34.5 47.0 59.8 12.5 25.2 6 48 59.80 +6.55 27.960 58.2 54.3 la Mars . . . S.F. 28.2 41.0 53.5 6.3 19.2 6 53 53.64 —7.61 +4 53.84 —14.16 Thcr. att. 3 Bessel . . 278 21.5 34.3 47.0 59.7 12.4 6 58 46.98 +5.13 66°. 3 4a Mars . . . N.P. 13.6 36.8 39.2 52.0 4.5 7 3 39.22 —8.00 4 52. S4 13.13 Bar. red. to 32° F. 27.858 5 Bessel ... 278 22.8 35.8 48.3 0.6 13.5 7 5 48.20 +4.70 6J Mars . . . S.F. 15.6 28.8 41.2 53.6 6.6 7 10 41.16 — 9.18J 4 52.96 13.88} 7 Bessel ... 278 41.0 53.8 6.5 19.0 32.0 7 13 6.46 +7.42 8 Mars . . . N.P. 32.5 45.3 58.0 10.5 23.5 7 17 57.96 —5.58 4 51.50 13.00 9c Bessel ... 278 47.7 0.5 13.3 25.8 38.6 7 20 13.18 +7.05 10 Mars . . . S.F. 40.2 52.8 5.5 18.2 31.0 7 25 5.54 —6.62 4 52.36 13.67 11 Bessel ... 278 19.5 32.3 45.0 57.5 10.3 7 27 44.92 +6.6JJ 12 Mars . . . N.P. 10.1 22.8 35.5 48.2 1.0 7 32 35.52 -6.12 4 50.60 12.75} 13 Bessel ... 278 22.0 34.7 47.3 0.0 12.7 7 34 47.34 +6.32 14 Mars . . . S.F. 13.3 26.0 38.5 51.3 4.2 7 39 38.66 —7.20 4 51.32 13.52 15 Bessel . . . 278 20.3 33.0 45.8 58.5 11.2 7 41 45.76 +5.87 16 d Mars ... N.P 10.0 22.8 35.6 48.2 0.8 7 46 35.48 —6.614 4 49.72 12.48} 17 Bessel ... 278 42.0 54.6 7.5 20.0 32.8 7 49 7.38 +5.68 18 Mars . . . S.F. 32.5 45.3 58.0 10.5 23.5 7 53 57.96 —7.53 4 50.58 13.21 19 Bessel . . . 278 6.0 18.8 31.3 44.0 56.6 7 56 31.34 +5.45} 20 Mars ... N.P 55.5 8.2 20.8 33.4 46.0 8 1 20.78 —6.84 4 49.44 12.29} 21 Bessel ... 278 5.2 18.0 30.6 43.3 56.1 8 3 30.64 +5.26 22 Mars ... S.F 55.0 7.5 20.6 33.0 46.0 8 8 20.42 —7.76} 4 49.78 13.02} 23 Bessel ... 278 30.8 43.5 56.2 9.0 21.7 8 10 56.24 +5.07J ^ Ml Mars . . - N.P 18.2 32.0 44.6 37.3 10.0 8 15 44.43 —7.01 +4 48.18 —12.0?} AT SANTIAGO DE CHILE. 115 JANUARY », 1858— Continued. B H Chronometer time of transit. Planet— Star. [Thermometer*. I Mean of wires. Micr. Bar. Object. A. B. C. D. E. A a. At. Air. Wet. ^ 1 s. 8. s. E. B. h. m. 8. Rev. m. s. Rev. Indies. • , 2 25 Bessel ... 278 18.5 31.2 44.0 58.4 9.0 8 17 43.82 +4.98 27.940 55.2 52.3 26 Mars . . . S.F. 7.5 20.4 33.0 45.6 58.4 8 22 32.98 —7.82 +4 49.16 —12.80 Trier, an. 27 Bessel . . 278 56.0 8.7 21.5 34.0 46.8 8 24 21.40 +4.831 65°. 0 28/ Mara . . . N.P. 43.6 56.5 9.2 21.8 34.5 8 29 9.12 —7.01 4 47.72 11.84} Bar. red. 27.842 29 Bessel ... 278 46.6 59.0 11.8 24.5 8 30 59.14 +4.82 30 Mars . . . S.F. 22.5 35.0 47.6 0.3 13.1 8 35 47.70 —7.77 4 48.56 12.59 31 Bessel ... 278 6.2 19.0 31.6 44.2 57.0 8 37 31.60 +4.82 3? Mars . . . N.P. 53.5 5.9 18.5 31.3 44.0 8 42 18.64 —6.84 +4 47.04 —11.66 [ Remarks. a Blurred and tremulous. b Worse. c Tolerably good, though wavy. d Dim and blurred again. e Steady. /Good. Mean S. F. . . Eiglit transits . . Mean N. P. . . Eight transits . . h. in. h. m. s. . 7 46 14.76 . 75340.14 m. e. Results. in. s. Rex-. + 4 51.070 . . . —13.357 . + 4 49.555 ... — 12.407 . i iti nf ilriroa Micr. Bar. 1 Object. A. B. C. D. E. A a. A ,5. Air. Wet. 3; d s. s. s. a. s. h. m. s. Rev. m. s. Rev. Inches. O • 11 Bessel ... 278 32.6 45.3 58.0 10.7 23.4 6 55 58.00 —6.18 27.982 53.0 50.7 12 Mars . . . S.F. 10.8 23.5 36.2 48.7 1.7 6 59 36.18 +1.61 +3 38.18 +7.79 I Thcr. att. 13 Bessel ... 278 28.2 41.0 53.6 6.3 19.0 7 1 53.63 —3.67 60°. 0 14 Mars . . . N.P. 5.0 17.8 30.5 43.2 55.6 7 5 30.42 +4.921 3 36.80 8.591 ,0a3'3=V 27.900 15 Hcssel ... 278 23.2 35.9 48.5 1.2 14.0 7 8 48.56 —4.20 16 Mars . . S.F. 0.5 13.4 26.2 38.8 51.5 7 12 26.08 +3.81 3 37.52 8.01 17 Bessel ... 278 7.0 19.8 32.4 45.0 57.8 7 14 32.40 —4.61 18 Mars . . . N.P. 43.4 58.0 8.8 21.3 34.2 7 18 8.74 +4.231 3 36.34 8.84J 19 Bessel ... 278 47.0 59.8 12.4 24.8 37.5 7 20 12.30 —4.87 20 Mars . . . S.F. 24.0 36.5 49.3 1.9 14.8 7 23 49.30 +3.221 3 37.00 8.091 21 6 Bessel ... 278 49.5 2.5 15.0 27.5 40.4 7 34 14.98 —4.26 22 Mars . . . N.P. 24.5 37.0 50.0 2.5 15.5 7 37 49.90 +4.90 3 34.92 9.16 23c Bessel ... 278 29.3 42.1 54.9 7.5 20.4 7 39 54.82 —4.451 24 Mare . . . S.F. 5.3 18.0 .30.6 43.3 56.2 7 43 30.68 +4.02 3 35.86 8.471 25 Bessel ... 278 9.6 22.5 35.1 47.8 0.5 7 45 35.10 —4.641 26 Mars . . . N.P. 44.0 56.8 9.6 22.0 35.0 7 49 9.48 +4.601 3 34.38 9.25 27 Bessel ... 278 6.5 19.2 31.8 44.5 57.3 7 51 31.86 — 4.87J 28 Mars . . . 8.F. 41.5 54.5 7.2 19.8 32.5 7 55 7.10 +3.771 3 35.24 8.65 29 Bessel ... 278 51.3 4.2 16.8 29.8 757 4.19 —5.05 30 Mars . . . N.P. 12.5 25.2 38.0 50.7 3.3 8 0 37.94 +4.501 3 33.75 9.551 31 Bessel . . . 278 17.5 30.2 43.0 55.7 8.2 8 2 42.92 —5.14 32 Mars . . . S.F. 51.7 4.6 17.2 29.8 42.3 8 6 17.12 +3.671 3 34.20 8.811 33d Bessel ... 278 16.8 29.5 43.2 54.8 7.6 .8 8 42.18 —5.24 34 Mara . . . N.P. 50.0 2.5 15.3 27.7 40.4 8 12 15.18 +4.46 3 33.00 9.70 35 Bessel ... 278 37.0 50.0 3.8 15.5 28.2 8 15 2.70 —5.381 36 Mara . . . S.F. 11.5 24.0 36.8 49.4 2.3 8 18 36.80 +3.63 3 34.10 9.011 37 Bessel ... 278 2.6 15.4 28.0 40.6 53.4 8 20 28.00 —5.411 38 Mars . . . N.P. 35.0 47.7 0.5 13.2 25.7 8 24 0.42 +4.45 3 32.42 9.86J 39 e Bessel ... 278 36.2 48.7 1.5 14.3 27.0 826 1.54 —5.48 40 Mars . . . S.F. 9.5 23.2 34.8 47.5 0.2 8 29 34.84 +3.70 3 33.30 9.18 41 Bessel ... 278 53.0 5.6 18.4 31.1 43.8 8 31 18.38 —5.48 42 Mars . . . N.P. 37.3 50.2 2.7 15.5 8 34 50.09 +4.56 3 31.71 10.04 43 Bessel . . . 278 15.5 28. 3 41.0 53.6 6.5 8 36 40.98 —5.441 44 Mars . . . S.F. 48.2 1.0 13.6 23.2 39.0 8 40 13.60 +3.87 +3 32.62 +9.311 Remark*. a During all the observations to No. 20 inclusive, both objects were badly defined and wavy. b Recorded 17.5s. at wire D. c Slightly improving. d Better. e All the rest good measures. Results. Mean N. Mean S. P. . F. . . First five transits . First five transits 1 . 6 , . 6 i. in. i 53 31 59 41 64 .17 m. s. + 3 37.632 . 3 38.228 . Rev. . . +8.458 . . . 7.732 . , . . . =2 44 , . . 2 30 .95 .60 Mean N, Mean S. P. . F. . . Last six transits . Last six transits . . 8 . : 8 6 27 13 13 .17 .30 3 33.363 . 34.220 . . . 9 . . +8 ,595 . .908 . , . . 37 . . = 2 53 .01 .63 AT SANTIAGO DE CHILE. 117 JANUARY 8, 185S— Continued. Results — Continued. li. in. m. s. b. m. 8. Correction for chronometer at 6 54 . . . — 2 23.66 Santiago sid. lime N. P 6 51 8 98 Correction for chronometer at 7 0 . . , — 2 22.67 6 57 18 50 6 9 53 it A P. F. limbs in A. R. reduced to arc . . . 8.94 A N. S. limbs micr. in r«;v . 0.726 = 14.15 Variation of A. R. in 6m. 10s. . . . . . . -f- 4.92 Variation of declination in 6m. 10». . -f 1.82 . . . 13.86 o on • "— £.j\i h. in. m. 8. h. m. B. Correction for chronometer at 8 6 . . . —222.80 Correction for chronometer at 8 12 . . . —223.81 5 46 18 a A P. F. limbs in A. R. reduced to arc , . . 12.85 A N. S. limbs micr. in rev , 0.687 = 13.39 Variation of A. H. in 5m. 46s. . . . . . . + 4.61 Variation of declination in 5m. 46*. . + 1.71 Observed P. F. diameter . . . - . . . 17.46 Corr. for diam. of micr. wires . . . — 2.20 Observed N. S, diameter .... 12.90 h. m. /' h. m. n A p at 6 49 . . . 0 17 A ft at 8 2 OH A pat 6 55 0.15 A p at 8 8 . 0.15 JANUARY 9, 1853. w Chronometer time of transit. Micr. Planet— Star. It'lr Thermometer!. 1 Object. A. B. c. D. £. A a. A i. uar. Air. Wet. i d f. s. s. 8. s. s. h. m. s. Rev. m. 8. Rev. Inches. • • 1 Bcssel ... 278 40.2 52.8 5.5 18.2 31.0 6 43 5.54 +6.90 28.031 58.7 54.0 2 Mars . . . S.F. 32.0 45.0 57.6 10.3 23.2 6 46 57.62 3.34 +3 52.08 —3.06 Then att 3 Bessel ... 278 42.4 55.2 7.6 20.5 33.3 6 49 7.80 6.44 66°. 8 4 Mars . . . N.P. 33.0 45.5 58.3 11.0 23.8 6 52 58.32 3.74} 350.52 2.69} Bar. red. to 32° F. 27.928 5 Bcssel ... 278 33.5 46.3 59.0 11.6 24.5 6 54 58.98 6.04 6 Mars . . . S.F. 24.6 37.5 50.3 3.0 15.9 6 58 50.26 2.61 3 51.28 3.43 7 Bessel ... 978 46.8 59.5 12.2 24.9 37.6 7 1 12.20 5.67} 8 Mars . . . S.F. 37.6 50.5 3.4 15.9 28.5 7 5 3.18 9.39 3 50.98 3.28} 9 Besscl ... 278 23.5 36.3 49.0 1.7 14.5 7 7 49.00 5.14 10 Mars . . . N.P. 13.2 25.7 38.5 51.2 4.0 7 11 38.52 2.79 3 49.52 9.35 11 Bcssel . . . 278 13.8 26.7 39.3 52.0 4.6 7 14 39.28 4.81 12 Mare . . . N.P. 2.8 15.7 28.4 41.0 53.8 7 18 28.34 2.51} 3 49.06 2.29} 13 Bessel ... 278 32.1 44.7 57.5 10.0 22.9 7 20 57.44 4.47 14 Mars . . . S.F. 22.0 34.5 47.3 0.0 19.8 7 24 47.32 1.53 3 49.88 2.94 15 Besscl ... 278 28.2 41.0 53.8 6.3 19.0 7 26 53.66 4.11 16 Mars . . . N.P. 16.6 29-2 42.4 54.6 7.5 7 30 43.06 2.04 3 48.40 2.07 17 Bessel ... 278 16.5 29.0 42.0 54.5 7.4 7 32 41.88 3.88} 18 Mars . . . S.F. 5.5 18.2 31.0 43.7 56.5 7 36 30.98 1.10} 3 49.10 2.78 19 Bcssel ... 278 3.0 16.0 28.6 41.2 54.0 7 38 28.56 3.63} 20 Mars . . . N.P. 50.7 3.5 16.2 28.7 41.3 7 42 16.08 1.79 3 47.59 1.91} 21 nvsscl ... 278 59.0 11.7 24.3 37.0 49.8 7 44 24.36 5.40 22 Man . . . S.F. 47.5 0.2 13.0 95.4 38.3 7 48 12.88 9.87 348.59 2.53 23 . . 278 47.0 0.0 12.6 35.2 38.0 7 50 12.56 5.93 24 Mars . . . N.P. 34.0 46.8 59.3 12. U 24.8 7 53 59.38 3.51 3 46.82 1.72 25 Hi»i'l ... 278 39.4 51.3 5.0 17.7 30.3 756 4.74 5.01 26 Mars . . . S.F. 27.3 40.0 52.6 5.0 18.2 7 59 52.63 +2.61} +3 47.88 -2.39} 118 OPPOSITION OF MARS, 1851-52, JANUARY 9. 1852— Continued. QJ 0 • Chronometer time of transit. Micr Planet— Slar. Bar. Thermometers. E £1 s Object. A. B. C. D. E. A a. A S. Air. Wet. e 6 s. s. s. s. h. in. s. Rev. Ill S. Rev. Inches. . . K 27 Bessel ... 278 16.3 29.0 41.6 54.3 7.2 8 1 41.68 +5.00 27.990 55.3 52.4 28 Mars . . . N.P. 2.6 15.3 28.0 40.5 53.5 8 5 27.98 3.46 +3 46.30 —1.64 Ther. att. 29 Bessel ... 278 10.3 23.2 36.0 48.5 1.3 8 7 35.86 4.84 63°. 0 30 Mara . . . S.F. 1 57.5 10.2 22.8 35.5 48.3 8 11 22.86 2.56 3 47.00 2.28 to 32° F. 27.898 31 Bessel ... 278 53.2 6.0 18.8 31.4 44.2 8 15 18.72 4.69 32 Mars . . . N.P. 38.8 51.5 4.3 16.9 29.7 8 19 4.24 3.35 3 45.52 1.34 33 Bessel ... 878 30.6 43.3 56.0 8.6 21.5 8 20 56.00 4.59 34 o Mars . . . S.F. 17.0 29.6 42.6 55.2 7.8 8 24 42.44 2.47 3 46.44 2.12 35 Bessel ... 278 4.8 17.6 30.4 43.0 56.0 8 26 30.36 4.46i 36 Mars . . . N.P. 49.8 2.5 15.2 27.6 40.4 8 30 15.10 3.33 3 44.74 1.13J 37 Bessel . . . 278 26.0 38.6 51.4 3.9 16.8 8 31 51.34 4.461 38 Mars . . . S.F. 11.5 24.3 37.0 49.8 2.5 8 35 37.02 2.59 3 45.68 1.871 39 Bessel ... 278 . 54.3 7.0 19.6 32.3 8 37 6.96 4.484 40 Mars . . . N.P. 25.6 38.2 51.2 3.7 16.6 8 40 51.06 +3.50 +3 44.10 — 0.98J Remarks. Night very fair, and observations satisfactory, though both objects were wavy in motion. a Recorded 37.6s. at wire C. Results. h. m. s. m. 8. Rev. / // Mean S. F. . . . Ten transits . . . 7 41 11.79 + 3 48.884 .... —2.720 . . =0 53.01 Mean N. P. . . . Ten transits . . . 7 48 34.11 + 347.250 .... —1.805 . . =0 35.18 h. in. m. s. h. m. s. Correction for chronometer at 7 41 . . . —2 25.50 7 38 46 22 Correction for chronometer at 7 49 . . . — 2 25.51 7 46 8.60 7 22.38 // li A P. F. limbs in A. R. reduced to arc . . . 24.51 A N. S. limbs micr. in rev. . . . . 0.915=17.83 . . . — 6.10 Variation of declination in 7m. 22s. . — 2.20 . . . 18.41 Corr. for diam. of micr. wires — 2.20 Observed N. S. diameter . . . , 13.43 h. m. /; h. m. ii A p at 7 37 . . 0.05 A a at 7 44 . . 0.03 JANUARY 10, 1853. S Chronometer time of transit. Planet— Star. Thermometers. 4) M f ' Meun oi wires. £ Object. A. B. C. D. E. A a. A S. Air. Wet. g 6 K s. s. s. , B. h. m. s. Rev. 8. Rev. Inches. • • 1 Mars . . . S.F. 24.6 6 47 24 58 +3 50 28 003 60.0 55.7 2 Bessel . • . 278 12.0 6 48 11.98 7.95 —47.40 —4.45 Ther. att. 3 Mars . . . N.P. . . 31.0 43.8 56.8 . 6 49 43. m 4.32J 66°.0 4 Bessel . . , 278 20.3 33.0 45.6 6 50 32.99 7.88 49.10 3.5SJ Bar. red. to 32° F. 27.902 5 Mars . . . S.F. . . 10.5 23.2 35.8 , , 6 52 23.19 3.33 6 Bessel . . . 278 58.3 10.8 23.5 6 53 JO. 89 +7.72 —47.70 —4.39 AT SANTIAGO DE CHILE. 119 JANUARY 10, 1853— Continued. No. for reference. Object. Chronometer time of transit. Wean of wires. Micr. Planet— Star. Thermometers. A. B. C. D. E. An. Aj. Air. Wei. s. s. 8. s. s. ll. III. s. Rev. 8. Rev. Inches. • • 7 8 9 10 11 12 13 14 15 18 17 18 19 20 21 22 23 24 25 £6 27 38 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Mara . . . N.P. 14.7 4.0 44.3 32.5 33.8 23.2 37.3 35.6 7.0 56.6 27.5 16.8 57.2 45.2 46.5 36.0 50.2 38.2 19.8 9.5 46.6 40.3 39.5 9.8 58.0 59.1 48.8 2.5 51.0 32.3 22.3 • • 6 55 27.49 6 56 16.79 6 59 57.12 7 0 45.26 7 2 46.49 7 3 36.02 7 5 50.02 7 6 38.29 7 8 19.72 7 9 9.49 7 12 46.58 7 13 35.48 7 14 53.48 7 15 43.38 7 19 45.38 7 20 34.58 7 21 57.78 7 22 48.28 7 24 27.78 7 25 17.48 7 26 56.58 7 27 46.28 7 29 33.48 7 30 24.28 7 31 38.98 7 32 29.68 7 34 46.38 7 35 36.58 7 37 19.28 7 38 10.58 7 39 39.68 7 40 30.08 7 42 15.48 7 43 7.08 7 45 19.18 7 46 9.98 7 47 24.28 7 48 16.28 7 49 40.48 7 50 31.68 7 51 53.98 752 48.18 7 54 21.68 7 55 1Z.98 7 56 38.68 7 57 31.48 +3.97 7.37 2.78 7.10 3.51 6.881 2.50 6.70 3.15 6.551 2.19 6.35 2.93 6.22 1.86i 5.891 2.64 5.84 « 1.661 5.661 i.nij 5.54 2.31 5.41} 2.21 5.30 1.33 5.141 2.05 5.05J 1.221 4.99 1.971 4.84 1.05 4.74 1.81 4.64 0.95J 4.54 1.76 4.50 0.84 4.37 1.67 +4.27 —49.30 48.14 49.53 48.27 49.77 48.90 49.90 49.20 50.50 49.70 49.70 50.80 50.70 50.20 51.30 50.40 51.60 50.80 52.00 51.20 53.30 51.30 -59.80 —3.40 4.32 3.37* 4.20 3.40} 4.16 3.30 4.03 3.30 4.00 3.92} 3.101 3.09 3.811 3.001 3.76J 8.861 3.69 9.83 3.581 3.74 3.53 -2.M 28.003 Ther. att. 66°. 0 Bar. rerl. to 32° F. 27.903 60.0 55.7 Bessel . . . -276 Mars . . . S.F. Bcsscl ... 278 • • Bessel ... 278 Mars . . S.F. Bessel ... 278 Mars , . . N.P. Bessel. . . 278 Mars . . . S.F. • • Bcssel ... 278 Mare . . . N.P. • • • • 35.5 53 5 • • 43.4 M;ir-< . . . S.F. 45.4 Bessel ... 278 Mars . . . N.P. Bessel . . . 278 Mars . . . S.F. • • ' ' 34.6 57.8 48.3 27 8 • • • • Bessel ... 278 Mars . . . S.F. • • • • 17.5 56 6 • • Bessel ... 278 Murs . . . N.P. Bessel ... 278 Mare . . . N.P. • • • • 46.3 33.5 24.3 39.0 • • Bessel ... 278 Mars . . S.F. 29 7 46 4 Bessel ... 278 Mars . . . N.P. Bessel . . . 278 Mars . . . S.F. • • 36.6 19.3 10.6 39.7 • • • • Bessel . . . 278 Mars . . . N.P. Bessel ... 278 Mars . . . S.F. Bessel ... 278 Mars N P. 30 1 • • 15.5 7.1 19.9 10.0 24 3 • • • • Bessel . . . 278 Mars . . . S.F. Bessel ... 278 Mars . . . N.P. • • » . 16.3 40.5 31.7 54.0 • • • • Bessel . . . 278 • • • •. 46.3 21 7 • • • • Bessel ... 278 Mars . . N.P. Bessel ... 278 • • 13.0 ».1 31.5 • • ;; 120 OPPOSITION OF MARS, 1851-52, JANUAKY 10, 1853— Continued. i a I 2 a 6 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 83 83 84 85 86 87 88 89 90 91 93 Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A (5. Air. Wet. s. B. s. s. s. h. m. s. Rev. s. Rev. Inches. • • Mars S F. 34.8 8 0 34.78 8 1 26.68 8 3 25.88 8 4 18.98 8 5 30.48 8 6 22.58 8 7 35.68 8 8 28.98 8 10 17.48 8 11 9.88 8 12 19.98 8 13 13.48 8 14 34.48 8 15 26.98 8 16 46.18 8 17 40.18 8 18 52.08 8 19 44.98 8 21 25.98 8 22 19.98 8 23 41.68 8 24 34.98 8 25 29.28 8 26 23.58 8 27 28.58 828 21.28 8 29 18.58 8 30 13.48 8 31 30.58 8 32 24.18 8 33 21.98 8 34 16.78 8 35 18.28 8 36 12.28 8 37 7.28 8 38 2.48 8 38 53.48 8 39 47.58 8 40 35.28 8 41 30.58 +0.77 4.18 1.59 4.10 0.73 4.09 1.51J 4.02 0.68J 3.97J 1.52 3.92* 0.66 3.87 1.51 3.83 0.67J 3.801 1.54 3.80 0.69 3.73 1.54 3.76 0.71 3.77 1.60 3.75 0.71J 3.63 1.50 3.59 0.73 3.63 1.61 3.62 0.76 3.66 1.67J +3.65 —51.90 53.10 52.10 53.30 52.40 53.50 52.50 54.00 52.90 54.00 53.30 54.30 52.70 54.90 53.60 54.80 54.00 55.20 54.10 —55.30 —3.41 2.51 3.36 2.50} 3.29 2.40J 3.21 2.32 3.13 2.26 3.04 2.22 3.06 2.15 2.911 2.09 2.90 2.01 2.90 — 1.97i 27.984 Ther. att. 65°0 Bar. red. to 32° F. 27.886 60.0 54.0 Bessel ... 278 Mars N.P. 26.7 25.9 Bessel ... 278 • • • • 19.0 30.5 • • Bessel ... 278 Mars . . . N.P. Bessel ... 278 • • • • 22.6 35.7 29.0 17.5 Bessel ... 278 Mars . . . N.P. Bessel ... 278 Mars S F. • • • • 9.9 20.0 13.5 34.5 • • Bessel ... 278 Mars . . . N.P. • • • • 27.0 46.2 40.2 Bessel ... 278 52.1 Bessel ... 278 Mars . . N.P. • ; 45.0 26.0 • • Bessel ... 278 • • • • 20.0 41.7 • • Bessel . . . 278 Mare . . . N.P. Bessel ... 278 • • 35.0 29.3 23.6 28.6 • • • • Bessel ... 278 Mars . . . N.P. • • • • 21.3 18.6 • • • • Bessel ... 278 • • 13.5 30.6 • • • • Bessel ... 278 Mars . . . N P. • • 24.2 22.0 • • Bessel ... 278 Mars . . . S.F. Bessel ... 278 Mars . . . N.P. Bessel . . . 278 Mars . . . S.F. Bessel ... 278 Mars . . . N.P. Bessel . . . 278 • • • • 16.8 18.3 12.3 7.3 2.5 53.5 47.6 35.3 30.6 • • • • Remarks. Until ~h. 20m. the images were not very well defined, nor their motions, steady, but after that time both objects were extremely sharp, and the measures very satisfactory. AT SANTIAGO DE CHILE. 121 JANUARY 1O, 1852— Continued. Results. Mean S. F. . . Twenty-three transit* Mean N. P. . . Twenty-three transits h. m. s. . 7 47 49.60 7 50 19.10 m. s. Rer. — 0 50.974 .... —3.612 . -052.256 .... -2.735 . i it . . —I 10.40 . . =0 53.30 h. m. Correction for chronometer at 7 48 , . m. P. . —2 W.K3 Santiago sid. time S. F h. in. s. Correction for chronometer at 7 50 . . —2 27.63 A P. F. limbs in A. R. reduced to arc Variation of A. R. in 2m. 30j Observed P. F. diameter . . . 4 . . . 19.23 . . — 2.13 . . 17.10 A N. S. limbs mic. in rev Variation of declination in 2m. 30». . Corr. lor diani. of micr. wires . . . Observed N. S. diameter .... . 0.877=17.09 — 0.75 — 2.20 14.14 h. m. A f at 7 46 H . . . 0.06 h. m. A p at 7 48 .... ii . 0.05 JANUARY 11, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet — Star. Bar. Thermometers. A. B. C. D. E. A a. A i. Air. Wet. s. a. s. s. s. h. m. s. Rer. m. 8. Rev. Inches. • 0 1 B.'ssel . . , 278 f t 53.2 5.7 18.5 31.4 7 59 5.85 +4.36* 28.093 56.3 52.0 9 Mars . . . S.F. 6.0 18.8 31.3 44.0 56. 8 8 1 31.38 3.79 +225.53 —0.57* 3 4 5 Bcssel ... 278 Mars . . . N.P. Beasel . . . 278 16.8 41.5 43.5 30.0 54.0 56.4 42.5 6.8 9.3 55.2 19.5 21.7 8.2 32.3 34.5 8 3 42.54 8 6 6.82 8 8 9.08 4.12} 4.50 4.04 224.28 +0.37* Ther. att. 64° .2 Bar. red. to 32° F. 27.997 6 Mars . . . S.F. 8.5 21.4 34.2 46.8 59.7 8 10 34.12 3.63 2 25.04 —0.41 7 Besscl ... 278 50.5 3.4 16.0 28.8 41.6 8 12 16.06 4. OH 8 Mare . . . N.P. 14.2 27.0 39.6 52.4 5.0 8 14 39.64 4.50* 223.58 +0.49 9. Bessel . . . 278 59.3 11.8 24.7 37.5 50.3 8 16 24.72 3.96 10 Mars . . . S.F. 23.3 36.5 49.0 1.7 14.8 8 18 49.16 3.62* 2 24.44 —0.33* 11 Besscl . . . 278 5.5 18.8 31.3 44.0 57.0 820 31.32 3.90* 13 Mars . . . N.P. 28.7 41.5 54.4 7.0 19.8 8 22 54.28 4.58 2 22.96 +0.67* 13 Besscl ... 278 19.6 32.4 45.8 58.0 10.8 8 24 45.22 3.93 14 Mars . . . S.F. 43.5 56.5 9.0 21.6 34.7 8 27 9.06 3.80 2 23.84 —0.13 15 16 Bessel ... 278 Mara . . . N.P. 23.4 45.8 36.0 58.5 48.8 11.4 0.7 24.0 14.5 38.8 8 28 48.68 8 31 11.30 3.92 4.70 3 22.62 +0.78 28.068 55.3 52.5 17 18 19 Besscl . . . 278 Mars . . . S.F. Besse) ... 278 39.8 53.2 32.0 42.5 44.6 55.3 18.0 8.0 30.8 10.2 20.8 44.3 23.0 8 32 55.28 8 35 18.40 8 38.57.46 3.94 3.96* 3.98* 2 23.12 +0.02* Ther. att. 63° .0 Bar. red. to 32° F. 27.976 20 Mars . . . N.P. 54.0 6.8 19.5 32.3 45.0 8 39 19.52 +4.86 +2 22.06 +0.87* Remarks. Early part of the night cloudy; after it cleared away, the measures were very fair. h. m. s. Results. m. s. Rev. i n . . 0 5.55 Mean N.P. . . Five transits . . h. m. Correction for chronometer at 8 19 . . . 8 22 50.31 m. s. . . —2 29.34 + 323.100 .... +0.639 . . Santiago sid. time S. F . . 0 12.45 h. m. s. 8 16 11.08 82020.96 4 9.88 A P. F. limbs in A. R. reduced to arc Variation of A. R. in 4m. 10s. . . . n ... 19.41 ... — 3.66 . . . 15.75 A N. S. limbs micr. in rev Variation of declination in 4m. 10*. . Corr. for diain. <>r mtcr. wires . . . . 0.924 = 18.01 — 1.28 — 9.30 14.55 h. m. // 0 00 h. in. A f at 8 19 // . . . 0.01 16 122 OPPOSITION OF MARS, 1851-52, JANTTART 13, 1853. « Chronometer time of transit. Planet— Star. Thermometers. V 1 Mean of wires Micr. Bar. £ s |M Object. A. B. C. D. E. A a. &t. Air. Wet. £ 6 s. s. S. 8. s. h. m. s. Rev. m. s. Rev. Inches. „ 0 2 1 Bessel . . . 278 2.8 15.5 38.2 6 46 15.50 +3.31J 28.013 54.0 50.0 2 Mars . . . S.F. 14.3 26.8 39.7 . . 6 47 26.93 3.97 +1 11.43 +0.651 Ther. att 3 Bessel ... 278 7.0 19.6 32.5 . . 6 49 19.70 3.05 63°. 2 4 Mare . . . N.P. . . 17.0 29.5 42.2 • • 6 50 29.57 4.68 1 9.87 1.63 Bar. red. to 32° F. 27.920 5 Bessel ... 278 35.5 48.2 1.0 . . 6 52 48.23 2.90 6n Mars . . . 8.P. • • 46.3 59.0 12.7 6 53 59.33 3.62 1 11.10 0.72 7 Bessel ... 278 . 22.4 35.0 47.7 f 6 55 35.03 2.63 8 Mars . . . N.P. 32.0 44.5 57.0 • • 6 56 44.50 4.31 1 9.47 1.68 9 Bcssel ... 278 46.0 58.8 11.5 t . 6 58 58.77 2.40 10 Mars . . . S.F. • • 56.6 9.3 22.0 7 0 9.30 3.25 1 10.53 0.85 11 Bessel . . . 278 21.5 34.0 46.8 7 4 34.10 1.80 13 Mars . . . N.P. • • 30.4 43.0 55.5 • • 7 5 42.97 3.65 1 8.87 1.85 13 Bessel ... 278 10.2 23.0 35.6 . , 7 7 22.93 1.631 14 Mars . . . 8.F. 20.3 33.0 45.5 7 8 32.93 2.58 1 10.00 0.951 15 Bessel ... 378 11.7 24.4 37.2 . g 7 10 24.43 1.48 16 Mars . . . N.P. 20.4 33.1 45.6 • • 7 11 33.03 3.39 1 8.60 1.91 17 Bessel ... 278 9.3 22.0 34.8 7 13 22.03 1.39 18 Mars . . . S.F. 18.8 31.5 44.2 • . 7 14 31.50 2.40 1 9.47 1.01 19 Bessel . . . 278 5.6 18.2 31.0 . 7 16 18.27 1.06 20 Mars . . . N.P. • • 13.5 26.3 39.0 • . 7 17 36.27 3.15 1 8.00 2.09 21 Bessel ... 278 . 3.5 16.3 28.5 7 19 16.10 0.97 22 Mars . . . S.F. 12.5 25.4 38.0 • • 7 20 35.30 2.20J 1 9.20 1.231 y:i Bessel ... 278 32.0 44.8 57.4 7 22 44.73 0.78 24 Mare . . . N.P. • • 40.1 52.6 5.3 . . 7 23 52.67 3.86 1 7.94 2.08 25 Bessel ... 278 , . 37.4 50.1 2.6 7 25 50.03 0.631 26 Mars . . . 8.F. • • 46.2 58.8 11.5 7 26 58.83 1.95 1 8.80 1.31^ 27 Bessel ... 278 32.3 45.0 57.8 7 28 45.03 0.52 28 Mars . . . N.P. • • 39.8 52.3 5.1 . . 7 29 52.40 2.73 1 7.37 2.21 29 Btssel . . . 278 19.3 31.7 44.5 7 31 31.83 1.83J 30 Mars . . . S.F. 27.4 40.1 52.6 7 32 40.03 3.31 1 8.20 1.471 31 Bessel . . . 278 39.3 52.0 4.6 7 35 51.97 1.69 32 Mars . . . N.P. 46.2 58.8 11.5 7 36 58.83 3.99 1 6.86 2.30 33 Bessel . . . 278 53.1 5.7 18.5 7 39 5.77 1.52 34 Mars . . . S.F. 1.0 13.6 26.2 . . 7 40 13.60 2.971 1 7.83 1.45i 35 Bessel . . . 278 36.9 49.5 2.2 7 41 49.53 1.38 36 Mara . . . N.P. 43.4 56.0 8.6 7 42 56.00 3.81 1 6.47 2.43 37ft Bessel . . . 278 2.0 14.8 27.4 7 44 14.73 1.32 38 Mars . . . S.F. 9.5 22.3 34.5 7 45 22.10 2.89 1 7.37 1.57 39 Bessel . . . 278 . . 46.5 59.3 12.0 7 46 59.27 1.20 40 Mars . . . N.P. 52.6 5.4 18.1 7 48 5.37 3.69 1 6.10 2.49 41 Bessel . . . 278 32.6 45.3 58.0 7 49 45.30 1.121 42 Mars . . . S.F. 39.9 52.5 5.1 7 50 52.50 2.76} 1 7.20 1.64 tt« Be.»s(.| . . . 278 43.6 56.4 9.0 7 53 56.33 1.00 44 Mars . . . N.P. 49.5 3.2 15.0 . . 7 55 2.23 3.60 1 5.90 2.60 45 c Bessel ... 278 6.0 18.8 31.5 7 56 18.77 0.93 46 Mars . . . S.F. • • 12.5 25.5 38.3 • • 7 57 25.43 +2.73 + 1 6.66 +1 80 AT SANTIAGO DE CHILE. 123 JANUARY 1 !. 1853— Continued. s Chronometer time of transit. M|-_ Planet— Star. Thermometers. V E Object. A. B. C. D. E. icr« A a. A* Bar. Air. Wet. g . . - 1.00 Observed P. F. diameter 18.07 Corr. for diam. of micr. wires . . — 3.20 Observed N. 8. diameter . . . 15.00 h. m. m. s. b. m. 8. Correction for -lirnnn I r at ft OS g 32.22 8 22 56.20 Correction for chronometer at 8 29 . . . —2 32.23 Santiago sid. time N. P 837 4.33 4 8.13 H A P. F. limbs in A. R. reduced to arc . . . 17.85 A N. S. limbs micr. in rev. . . . . 0.885=17.35 Variation of A. R. in 4m. 8« . . — 3.73 Variation of declination in 4m. 8t. . — 1.25 . 14.12 Corr. for diam. of micr. wires . . — 2.20 13.80 b. m. „ h. m. A p at 7 20 0 02 A f at 8 23 .... 0.04 A 6 at 7 23 . 0.04 Af>al8 36 .... O.Oi 124 OPPOSITION OF MARS, 1851-52, JANUARY 13, 1S53. g Chronometer time of transit. Planet— Star. Thermometers. c Mpin of wires Micr. Bar. 1 Object. A. B. C. D. E. A a. A ,5. Air. • Wot. £ (2 d s 8. s. s. s. h. m. s. Kcv. m. s. Rev. Inches. „ 0 M 1 Bessel ... 378 15.2 27.5 40.5 . 7 29 27.73 +4.36 28.150 51.0 48.8 3 Mars . . . S.F. 23.8 36.5 49.3 7 30 36.53 4.95 +1 8.80 +0.59 Ther. att. 3 Bessel ... 278 t 1.3 14.0 26.7 7 32 14.00 4.31 59°. 7 4 Mara . . . N.P. . . 9.0 21.7 34.3 7 3321.67 5.81 1 7.67 1.50 Bar. red. to 32° F. 28.068 5 Bessel ... 378 33.5 46.1 58.8 7 34 46.13 4.22| 6 Mars . . . S.P. 42.0 54.5 7.1 7 35 54.53 4.90} 1 8.40 0.68 7 Bessel ... 378 5.5 18.1 30.8 7 38 18.13 4.11 8 Mars . . . N.P. 12.6 35.3 38.0 7 39 25.30 5.72J 1 7.17 1.61J 9n Bessel . . . 278 7.0 20.0 32.5 , f 7 41 19.83 3.93 10 Mars . . . S.F. 15.2 28.0 40.5 7 42 27.90 4.87} 1 8.07 0.94} 11 Bessel ... 278 . . 46.8 59.5 12.0 7 43 59.43 3.93 126 Mara . . . N.P. • • 53.3 6.0 18.5 • • 7 45 5.93 5.58 1 6.50 1.65 13 Bessel ... 278 . . 12.0 24.5 37.0 t t 7 47 24.50 3.80 14 Mars . . . S.F. 19.8 33.5 45.0 • • 7 48 32.43 4.69 1 7.93 0.89 15 Bessel ... 278 8.8 31.6 34.0 . 7 50 21.47 3.73 16 c Mars . . . N.P. 15.0 37.8 40.5 • • 7 51 27.77 5.55 1 6.30 1.82 17 Bessel ... 278 15.7 28.3 41.2 g 7 53 28.40 3.66} ISd Mars . . . S.F. • • 23.0 35.6 48.3 7 54 35.63 4.62 1 7.23 0.95} 19 Bessel ... 378 54.2 6.9 19.5 7 56 6.87 3.59 20 Mars . . . N.P. 0.0 12.8 25.4 7 57 12.73 5.54} 1 5.86 1.95} 31 Bessel ... 378 1.8 14.5 27.3 8 1 14.53 3.33} 33 Mars . . . S.F. • • 8.5 21.2 34.0 • • 8 2 21.23 4.54 1 6.70 1.30} 23 Bessel ... 378 . . 9.5 22.3 35.0 . 8 4 22.27 3.31 24 Mars . . . N.P. 14.6 27.4 40.3 8 5 27.43 5.29 1 5.16 1.98 35 Bessel ... 378 . , 31.5 34.2 47.0 . 8 6 34.23 3.25 36 Mars . . . S.F. • • 38.0 40.6 53.3 . . 8 7 40.63 4.51 1 6.40 1.26 37 Bessel ... 278 . . 41.7 54.5 7.2 . 8 8 54.47 3.19} 28 Mars . . . N.P. • '• 46.8 59.5 13.3 8 9 59.50 5.37 1 5.03 2.17} 29 Bessel ... 278 11.5 24.3 37.0 8 11 24.27 3.321 30 Mara . . . S.F. • • 17.5 30.4 43.0 • • 8 12 30.30 4.52 1 6.03 1.29} 31 Bessel . . . 278 34.6 47.5 0.3 8 13 47.47 3.20 33 Mars . . . N.F. 39.6 52.3 5.0 8 14 52.30 5.39 1 4.83 2.19 33 Bcssel ... 278 . . 58.3 11.0 33.8 8 16 11.03 3.19 34 Mars . . . S.F. • • 4.0 16.8 39.5 . . 8 17 16.77 4.66 1 5.74 1.47 35 Bessel ... 278 16.4 29.0 41.8 8 18 29.07 3.20 36 Mars . . . N.P. • • 20.8 33.4 46.0 8 19 33.40 5.48 1 4.33 2.28 37 Bessel ... 278 . 22.0 34.8 47.5 8 25 34.77 3.00 38 e Mars . . . S.F. 27.0 39.8 53.5 8 26 39.77 4.56 1 5.00 1.56 39 Bessel ... 278 35.5 48.3 1.0 8 37 48.37 3.03 40 Mars . . . N.P. • • 39.3 52.1 4.7 8 28 52.03 5.38} 1 3.76 2.35} «/ Bessel ... 278 58.0 10.8 33.5 8 30 10.77 3.04 28.126 51.0 44.4 43 Mars . . . S.F. 3.6 15.4 S8.2 8 31 15.40 4.59 1 4.63 1.55 43 Bessel ... 278 . . 10.6 23.3 36.0 8 32 23.30 3.03 Ther. att. 44 Mars . . . N.P. 14.0 26.8 39.5 8 33 26.77 5.53} 1 3.47 2.50} 58°. 0 Bar. red. to 32° F. 45 Bessel ... 278 29.0 41.5 54.4 8 34 41.63 3.07 28.050 46 Mars . . . S.F. • • 33.5 46.0 58.8 8 35 46.10 +4.72 +1 4.47 +1.05 AT SANTIAGO DE CHILE. 125 JANUARY 13, 1858— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A* Air. Wet. s. B. s. 8. 8. h. m. s. Rev. m. s. Rev. Inches. • | 47 48 Bcsscl ... 278 Mars . . . N.P. 34.5 37.8 47.2 50.4 0.0 3.0 • • 8 36 47.33 8 37 50.40 +3.00 +5.591 +1 3.17 +2.591 28.126 51.0 44.4 Remarks. Images blurred, flashing, and whirling, as if reflected from a basin of agitated mercury, a Recorded 27.5s. at wire D. J Tolerably good. b Images worse, if possible. e Good at last. c The colored portions now distinguishable. / Recorded 40.8s. at wire C. Results. h. m. s. m. >. Rev. / // Mean S. F. . . Twelve transits ,.83 48.10 + 1 6.617 .... +1.171 ... 0 22.83 Mean N. P. . . Twelve transits . 8 6 22.94 + 1 5.271 .... +2.052 ... 0 39.90 b. m. m. s. h. m. 8. Correction for chronometer at 8 4 , . — 2 34.75 8 1 13 35 Correction for chronometer at 8 6 . . . —2 34.75 8 3 48.19 2 34.84 // H A P. F. limbs in A. R. reduced to arc . . . SO. 19 A N. S. limbs micr. in rev. . . . . 0.881 = 17.17 Variition of A R in 2wi 35s . . . . — 2.39 Variation of declination in 2m. 35s. — 0.78 Observed P. F. diameter . • • < . . . 17.80 Corr. for diam. of micr. wires . . — 2.20 Observed N. S. diameter . . . 14.19 h. m. // b. m. // A o at 8 1 . 0.02 A a at 8 3 . 0.03 JANUARY 14, 1853. « V Chronometer time of transit. Planet— Star. Thermometers. \T •• nfwirpa Micr Bar £ S Object. A. B. C. D. E. A a. A<5. Air. Wet. 6 a. s. 6. b. m. 8. Rev. m. 8. Rev. Inrh.-s. A • Z 1 Bessel ... 378 46.3 6 57 46.08 +5.15 27.957 59.5 53.7 2 Mars . . . S.F. 10.0 . . . 6 59 9.98 -5.871 +1 23.70 —11.021 Ther. att. 3 Bessel ... 278 35.7 , , 7 2 35.68 +4.301 66° .2 4 Mars . . . N.P. 58.5 7 3 58.48 —5.73 1 22.80 10.031 Bar. red. to 32° F. 27.855 5 Bessel ... 378 3.0 . . . . 7 6 2.98 +4.111 | 26.5 7 7 26.48 —6.741 1 23.50 10.86 7 Bessel ... 278 43.6 7 8 43.58 +3.98 g 6.2 7 10 6.18 —5.961 1 22.60 9.941 9 Bessel . . . 278 48.5 7 12 48.48 +3.73 10 11.5 7 14 11.48 -6.941 1 23.00 10.67J 11 Besscl ... 278 48.6 7 15 48.58 +3.71 12 Mars . . . N.P. 10.1 • • 7 17 10.08 —6.12} 1 21.50 9.831 13 Bessel ... 278 37.6 7 18 37.58 +3.62 14 Mars . . . S.F. 0.0 7 19 59.98 —7.03 1 32.40 10.65 15 Bessel ... 278 19.0 7 21 18.98 +3.441 16 Mars . . . N.P. 40.1 • • 7 22 40.08 — 6.25J +1 21.10 -9.70 126 OPPOSITION OF MARS, 1851-52, JANUARY 14, 1853— Continued. • Chronometer time of transit. Planet— Star. Thermometers i tfean of wires Micr Bar 1 Object. A. B. C. D. E. A a. A <5. Air. Wet. ^ 6 s. s. s. s. s. h. in. s. Rev. in. s. Rev. Inches. 0 0 2 17 Bessel ... 278 44.9 7 23 44.88 +3.414 27.957 59.5 53.7 18 7.0 7 25 6.98 7 |^i +1 22.10 —10.57 Pher. att. 19 Bessel ... 278 t p 13.2 , . 7 26 13.18 +3.314 66°. 2 20 Mars . . . N.P. . . 34.0 . . 7 27 33.98 —6.354 1 20.80 9.67 Bar. red. o 32° F. 27.855 21 Bessel ... 278 . . . . 6.2 7 29 6.18 +3.17 22 Mars . . . S.F. 27.9 • • 7 30 27.88 —7.27 1 21.70 10.44 23 Bessel ... 278 . 22.0 ( t * . 7 32 21.98 +3.05 24 Mars . . . N.P. • • • • 42.5 7 33 42.48 —6.474 1 20.50 9.524 25 Bessel ... 278 50.8 , . 7 34 50.78 +2.93| 26 Mars . . . S.F. • • • • 12.3 • • 7 36 12.28 —7.42 1 21.50 10.354 27 Bessel ... 278 . , . . 22.0 7 37 21.98 +2.824 28 42.5 7 38 42.48 —6.67 1 20.50 9.491 29 Bessel ... 278 46.4 7 39 46.38 +2.76 30 Mars . . . S.F. • • • • 7.4 ' ' 7 41 7.38 —7.52 1 21.00 10.28 31 Bessel ... 278 . . 16.5 , . . 7 42 16.48 +2 624 32 Mars . . . N.P. 36.2 ' ' • • 7 43 36.18 —6.77 1 19.70 9.394 33 Bessel . . . 278 . . 12.8 . . 7 45 12.78 +2.55 34 Mars . . . S.F. 33. a 7 46 33.28 —7.65 1 20.50 10.20 35 Bessel ... 278 . . 33.5 . 7 47 33.48 +2.50 36 Mars . . . N.P. • • 53.0 • • 7 48 52.98 —6.804 1 19.50 9.30J 37 Bessel . . . 278 . . 54.4 7 49 54.38 +2.42 38 Mars . . . S.F. • • • • 14.8 ' • • • 7 51 14.78 — 7.68J 1 20.40 lO.lOi 39 Bessel ... 278 . . . . 23.5 . . . 7 52 28.48 +2.39 40 Mars . . . N.P. 47.5 7 53 47.48 — 6.864 1 19.00 9 25* 41 Bessel ... 278 34.8 7 55 34.78 +2.28 a ,t~j^ 42 Mars . . . S.F. 54.5 7 56 54.48 — 7.75 1 19.70 10.03 43 Bessel ... 278 15.0 7 58 14.98 +2.24 44 Mars . . . N.P. 33.8 7 59 33.78 — 6.854 1 18.80 9.094 45 Bessel ... 278 27.3 8 0 27.28 +2.20 46 Mars . . . S.F. 47.0 8 1 46.98 7.74 1 19.70 9.94 47 Bessel ... 278 48.2 8 248.18 +2.12 48 Mars . . . N.P. 6 6 8 A 6.58 6.92 1 18.40 9.04 49 Bessel . . , 278 4.0 8 5 3.98 +2.08 50 Mars . . . S.F. 23.5 • • 8 6 23.48 —7.82 1 19.50 9.90 51 Bessel ... 278 17.1 8 8 17.08 +2.11 52 Mars ... N.P 35.8 . . 8 9 35.78 —6.93 1 18.70 9.04 53 Bessel ... 278 . . 37.5 8 10 37.48 +2.004 54 Mars ... S.F 56.8 8 11 56.78 7 76 1 19.30 9.761 55 Bessel . . . 278 0.3 8 13 0.28 +2.03 56 Mara ... N.P • • • • 17.5 8 14 17.48 —6.89 1 17.20 8.92 57 Bessel ... 278 26.1 . , 8 15 26.08 +1.95 58 Mars . . . S F 44.6 8 16 44.58 7 77 1 18 50 9 72 59 Bessel ... 278 38.7 8 17 38.68 +1.95 60 Mars ... N.P 56.4 8 18 56.38 —6.864 1 17.70 8.81i 61 Bessel ... 278 . . 10.6 8 20 10.58 +2.00 62 Mars ... S.F • • 29.4 8 21 29.38 —7.71 +1 18.80 —9.71 AT SANTIAGO DE CHILE. 127 JANUARY 14, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. c. D. E. A a. Ac). Air. Wet. B. 8. s. s. s. h. in. 9. Rev. in. B. Rev. Inches. O • 63 64 65 66 67 68 69 TO 71 72 Bcssel ... 278 Mars . . . N.P. Bessel ... 278 Mars . . . S.F. Bcsscl ... 278 Mars . . . N.P. Bessel ... 278 Mars . . . S.F. 22.6 8 23 22.58 8 23 39.48 8 24 32.78 8 25 50.98 8 26 49.38 8 27 59.18 8 28 57.38 8 30 15.18 8 31 19.68 832 36.38 +1.95 —6.84 +1.93 —7.65 +1.94 —6.78 +1.96J -7.561 +1.96 +6.681 +1 16.90 1 18.20 1 18.80 1 17.80 +1 16.70 —8.79 9.58 8.72 9.53 —8.641 27.870 Ther. att. 64°. 3 Bar. red. to 32° F. 27.774 59.0 50.0 • • • • 39.5 32.8 • • • • • • • • 51.0 42.4 • • • • 59.2 57.4 Bessel ... 278 Mars . . . N.P. 19.7 36 4 Remarks. A superb night, and satisfactory measures throughout. Mean S. F. . . Fourteen transits . . Mean N. P. . . Fourteen transits . . h. m. Correction for chronometer at 7 48 . . . Correction for chronometer at 7 51 . . . A P. F. limbs in A. R. reduced to arc . Variation of A. R. in 2m. 40s Observed P. F. diameter h. m. A f at 7 45 . . , h. m. R. 7 47 56.24 7 50 36.41 m. B. — 2 37.30 — 2 37.30 18.43 . — 2.52 15.90 . . 0.18 Results. m. a. Rev. + 1 20.628 .... —10.185 . + 1 19.400 .... — 9.290 . Santiago sid. time S. F . . =3 18.51 . . =3 1.48 h. m. a. . . 7 45 18.94 it Variation of declination in 2m. 40s. . Corr. for diam. of micr. wires . . . Observed N. S. diameter .... h. m. A p at 7 47 — 0.80 — 2.20 14.44 it JANUARY 15, 1853. There being an error of 1° in the computation for the EpheineriB, the star selected for the night was not found, and therefore there are no differ- ential measures. JANUARY 16, 1859. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet — Bur. Bar. Thermometers. A. B. C. D. E. A a. Ad. Air. W,t. B. s. s. s. s. h. m. s. Rev. m. «. Rev. Inches. • • 1 3 Bessel ... 344 Mars . . , S.F. 8.0 24.5 20.5 37.5 33.3 50.4 46.0 3.0 58.8 15.8 6 39 33.33 6 41 50.34 +3.671 2.51 +2 16.92 —1.16) 27.988 63.0 57.0 3 4 5 Bessel ... 344 Murs . . . N.P. Bessel . . . 344 36.8 42.3 44.5 39.5 55.2 57.1 52.4 7.8 9.9 5.2 20.7 22.5 18.0 33.5 35.5 6 44 52.38 6 47 7.90 6 49 9.90 3.30 3.99 2.951 3 15.53 0.31 Ther. nit. 67°. 9 Bar. red. 27.882 6 Mare . . S.F. 0.5 13.5 26. 3 39.0 51.8 6 51 26.22 +2.061 +3 16.33 —0.89 128 OPPOSITION OF MARS, 1851-52, JANUARY 10, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet — Star. Bar. 'hermometcrs. A. B. C. D. E. A a. Ai. Air. Wet. s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. • • 7 Bessel . . 344 16.8 29.8 42.5 55.2 8.0 6 55 42.46 +2.58 27.988 63.0 57.0 8 Mars . . . N.P. 31.5 44.5 57.0 9.6 22.5 6 57 57.02 2.52 +2 14.50 —0.06 9 10 11 Bessel ... 344 Mare . . . S.F. Bessel ... 344 30.2 45.5 59.0 43.0 58.5 11.8 55.7 11.2 24.6 8.5 24.0 37.5 21.3 36.8 50.4 6 59 55.74 7 2 11.20 7 4 24.66 2.351 1.55 2.10J 2 15.46 0.801 Thcr. att. 67°. 9 Bar. red. to 32° F. 27.882 12 Mars . . . N.P. 13.2 26.0 38.8 51.4 4.2 7 6 38.72 2.18 2 14.06 +0.07J 13 Bessel ...'111 14.5 27.3 40.0 52.8 5.6 7 8 40.04 1.97 14 Mars . . . S.F. 29.8 42.6 55.3 7.8 20.8 7 10 55.26 1.34 2 15.22 —0.63 15 Bessel ... 344 28.2 41.6 54.0 6.5 19.5 7 13 53.96 1.74 16 Mars . . . N.P. 42.0 54.6 7.5 20.3 33.0 7 16 7.48 1.97 2 13.52 +0.23 17 Bessel ... 344 32.6 45.5 58.3 11.0 23,7 7 17 58.22 1.561 18 Mars . . . S.F. 47.0 59.8 12.5 25.3 38.3 7 20 12.58 0.99 2 14.36 —0.571 19 Bessel ... 344 45.4 58.0 10.7 23.6 36.5 7 22 10.84 1.42 20 Mars . . . N.P. 58.0 in. 8 23.8 36.5 49.3 7 24 23.68 1.76 2 12.34 +0.34 21 a Bessel ... 344 21.5 34.5 47.3 0.0 12.8 7 26 47.22 3.51 22 Mars . . . S.F. 35.3 48.0 0.8 13.5 26.5 7 29 0.82 3.131 2 13.60 —0.371 23 Bessel . . . 344 44.2 57.0 9.8 22.5 35.3 7 31 9.76 3.321 34 Mars . . . N.P. 56.3 9.2 21.9 34.6 47.3 7 33 21.86 3.811 2 12.10 +0.49 25 Bessel ... 344 50.8 3.5 16.3 29.0 42.0 7 35 16.32 3.18J 26 Mars . . . S.F. 4.5 16.3 29.3 42.0 55.0 7 37 29.42 2.89 2 13.10 -0.291 27 Bessel ... 344 29.0 41.7 54.5 7^3 20.2 7 39 54.54 3.24 28 Mars . . . N.P. 40.5 53.5 6.3 19.0 31.7 7 42 6.20 3.90 2 11.66 +0.66 29 Bessel ... 344 37.0 49.8 2.5 15.3 28.1 7 44 2.54 3.151 30 Mars . . . S.F. 49.5 2.3 15.3 28.0 40.8 7 46 15.18 2.98 2 12.64 —0.171 31 Bessel ... 344 38.5 51.3 4.2 17.0 29.8 7 48 4.16 3.03 32 Mars . . . N.P. 49.5 2.4 15.3 27.9 40.6 7 50 15.14 3.83 2 10.98 +0.80 33 Bessel ... 344 41.0 53.7 6.5 19.3 32.0 7 52 6.50 2.94 34 Mars . . . S.F. 52.6 5.4 18.3 31.0 44.0 7 54 18.26 3.97 2 11.76 0.03 35 Bessel ... 344 56.8 9.5 22.3 35.0 48.0 7 56 22.32 2.86 36 Mare . . . N.P. 7.4 20.3 33.0 45.6 58.5 7 58 32.96 3.781 2 10.64 0.921 37 Bessel ... 344 56.3 9.2 22.0 34.6 47.5 8 021.92 2.80 38 Mars . . . S.F. 7.5 20.5 33.3 46.3 58.8 8 2 33.28 2.97 2 11.36 0.17 39 Bessel ... 344 42.5 55.0 8.2 21.0 33.8 8 8 8.10 4.11 40 Mars . . . N.P. 52.3 5.2 17.8 30.5 43.4 8 10 17.84 5.141 2 9.74 1.031 41 Bessel ... 344 45.8 58.5 11.4 24.9 37.0 8 12 11.34 4.06 42 Mars . . . S.F. 56.4 9.2 22.0 34.6 47.5 8 14 21.94 4.25 2 10.60 0.19 43 Bessel ... 344 53.0 5.5 18.5 31.2 44.0 8 17 18.44 4.07 44 Mars . . . N.P. 2.0 14.8 27.6 40.4 53.1 8 19 27.58 5.281 2 9.14 1.211 45 Bessel ... 344 42.5 55.4 8.0 21.0 33.8 8 21 8.14 4.11 27.962 59.5 54.7 46 47 48 Mars . . . S.F. Bessel ... 344 Mars . . . -N.P. 52.5 19.0 27.6 5.3 31.9 40.4 18.0 44.8 53.3 30.8 57.5 6.0 43.5 10.4 18.8 8 23 18.02 8 24 44.72 826 53.22 4.55 4.10 +5.41 2 9.88 +2 8.50 0.44 +1.31 Ther. att 66° .2 Bar. red. to 32° F. 27.860 Remarks. There was some indistinctness of definition and tremor in the motion of the objects at the commencement, which became less nnd less at each succeeding observation. o Sharp and steady. AT SANTIAGO DE CHILE. 129 J.VXUARY 1O, 1858— Colitlinu-il. Results. Mean S. F. . . Twelve transits Mean N. P. . - Twelve transits h. in. «. . 7 32 49.37 . 7 37 45.80 m. s. Rev. + 2 13.435 .... —0.340 . + 2 11.938 .... +0.559 . / 11 . . =0 6.63 . . =010.89 h. m. in. s. h. m. i. Correction for chronometer at 7 33 . . . —2 43.97 Santiago aid. lime S. F 7 30 5 40 Correction lor chronometer at 7 38 . . . — 2 43.9« Santiago sid. time N. P 7 35 1 &2 ft A P. F. limbs in A. R. reduced to arc . . . 22.45 A N. S. limbs micr. in rev. . . . . 0.899=17.51 Variation of A. R. in 4m. 36s. . . '. . . . + 4.91 Variation of declination in 4m. 56s. . — 1.48 17 54 Corr f A' f — 2 20 Observed N. S. diameter .... 13.84 h. m. ii h. m. n A p a' 7 29 . . . 0.01 A p at 7 34 . 0.01 JANUARY IT, 1853. 0 Chronometer time of transit. Planet— Star. Thermometers. 0) \fean of wire- Micr. Rflr 1 Object. A. B. C. D. E. A a. AJ. liar. Air. Wet. <£ c s. s. s. s. 8. h. m. s. Rev. m. s. . Rev. Inches. ' • 1 Mars . . . S.F. 6.0 18.7 31.4 44.3 57.4 6 35 31.56 +3.93 27.940 64.9 58.2 2 H. C. . . . 17513 34.0 47.0 59.8 12.5 25.3 6 39 59.72 4.64 —4 28.16 —0.71 Ther. utt. 3 Mars . . . N.P. 35.0 47.8 0.5 13.3 26.3 6 42 0.56 3.93J 68°. 8 4 H. C. . . . 17513 4.3 17.5 30.0 42.8 55.5 6 46 30.03 3.691 4 29.46 +0.24 Bar. red. to 32° F. 27.831 5 Mars . . . S.F. 14.2 27.0 39.8 52.5 5.5 6 48 39.80 2.66J 6 H. C. . . . 17513 42.8 55.7 8.5 21.4 34.3 6 53 8.54 3.22J 4 28.74 —0.56 7 Mars . . . N.P. 38.0 50.7 3.5 16.2 29.0 6 55 3.48 3.26 8 H. C. . . . 17513 8.3 31.3 34.0 46.8 59.5 6 59 33.96 2.81 4 30.48 +0.45 9 Mars . . . S.F. 13.0 25.8 38.5 51.3 4.3 7 1 38.58 2.20 10 B.C. . . . 17513 43.5 55.5 8.3 21.0 34.0 7 6 8.36 2.48 4 29.68 —0.28 11 Mars . . . N.P. 46.5 59.3 12.0 24.7 37.5 7 8 12 00 2.77 12 H. C. . . . 17513 17.5 30.5 43.4 56.3 9.0 7 12 43.34 2.14 4 31.34 +0.63 13 Mars . . . S.F. 36.3 39.2 52.0 4.6 17.8 7 14 51.98 1.74 14 H. 0. ... 17513 56.5 9.5 22.6 35.4 48.3 7 19 22.46 1.811 4 30.48 — O.lOi 15 Mars . . . N.P. 34.6 37.5 50.4 3.2 16.0 7 21 50.34 2.37 16 B.C. . . . 17513 10.0 22.6 35.5 48.0 7 26 22.63 1.59 4 32.29 +0.78 17 Mars . . . S.F. 15.5 28.4 41.3 54.0 6.8 7 28 41.20 1.19J 18 (I. C. . . . 17513 47.3 0.0 13.0 25.5 38.4 7 33 12.84 1.011 4 31.64 0.18 19 Mars . . . N.P. 56.5 9.2 22.0 34.7 47.5 7 35 21.98 1.1»k 20 a. 0. . . . 17513 39.5 43.3 55.0 7.8 21.0 7 39 55.13 0.85 4 33.14 0.94J 21 Mars . . . S.F. 52.5 5.8 18.5 81.3 44.3 7 42 18.48 3.66 • H. C. . . . 17513 25.5 38.3 51.1 3.8 16.8 7 46 51.06 3.33 4 32.58 0.33 23 Mars . . . N.P. 15.2 27.9 40.6 53.3 6.0 7 48 40.60 4.38 24 H. C. . . . 17513 49.2 2.0 14.8 27.5 40.5 7 53 14.80 3.06i 4 34.20 1.31} 25 Mars . . . S.F. 32.4 45.3 58.0 10.7 23.6 7 54 58.00 3.50 26 H. C. . . . 17513 5.7 18.6 31.5 44.2 57.0 7 59 31.40 2.96 4 33.40 0.54 27 Mars . . . N.P. 3.7 16.5 29.4 42.2 55.0 8 1 29.36 4.35| H H. C. . . . 17513 38.6 51.5 4.4 17.3 30.3 8 6 4.40 2.90J 4 35.04 1.45 97.930 61.5 55.0 29 Mars . . . S.F. 42.3 55.0 7.6 20.4 33.5 2 8 7.74 3.53 Ther. att. 30 H. C. . . . 17513 16.5 29.5 42.2 54.6 7.6 8 12 43.08 3.77 434.34 0.78 66°. 7 liar, n ii 31 Mars . . . N.P. 59.5 12.3 25.0 37.6 50.5 8 14 34.98 4.43 37.818 32 H. C. . . . 17513 35.3 48.0 0.8 13.5 26.5 8 19 0.89 +3.80 —435.84 +1.63 17 ' 130 OPPOSITION OP MAES, 1851-52, JANUARY IT, 18Sa— Continued. Remarks. Well defined and steady throughout. Results. •i. m. s. m. s. Rev. / it Mean S. F, . . Eight transits . . . 7 31 50.92 — 4 31.127 . . . + 0.019 . . . =0 0.37 Mean N. P. . . Eight transits . . . 7 28 22.91 — 4 32.724 . . . + 0.930 . . . =0 18.12 li. m. m. B. h. m. s. Correction for chronometer at 7 22 . . — 2 47.41 Correction for chronometer at 7 28 . . . —247.42 . . . 7 25 35 49 // n A P. F. limbs in A. R. reduced to arc . . . 23.95 A N. S. limbs micr. in rev. . . . 0.911 = 17.75 Variation of A. R. in 6»i. 32s. . . . . . — 6.51 Variation of declination in 6m. 32s. . — 1.92 Observed P. F. diameter . . 17.44 Corr. for diam. of micr. wires — 2.20 13 63 h. m. // h. m. // A p at 7 21 . . . 0.00 A p at 7 22 0 02 JANUARY 18, 1853. There were too many cirri constantly obscuring both the planet and star to permit observations with the equatorial, or to allow the comparing star to be seen on the meridian. JANUARY 19, 1853. There were too many cirri and too much haze to see the comparing star under any light. JANUARY 30, 1853. i Chronometer time of transit. Planet— Star. Thermometers. B V . Micr Btr £ £ s Object. A. B. c. D. E. Aa. A<5. ar. Air. Wet. c. 1 B. B. s. s. s. h. m. s. Rev. s. Rev. Inches. • « 1 Bessel . . . 344 39.8 i f 6 45 29.78 +2.52 27.953 65.0 58.5 3 Mars . . . S.F. 29.7 6 46 29.68 4 47 +59.90 6,99 i.^i Ther. att. 3 Bessel ... 344 . . 36.8 t 6 48 26.78 +2.26i 68°. 8 4 Mars . . . N.P. 24.6 6 49 24.58 —3.85 57.80 6. Hi Bar. red. to 32° F. 27.844 5 Bessel . . . 344 . . . . 26.5 . . 6 50 26.48 +2.16* 6 Mars . . . S.F. 25.8 6 51 25.78 4,72 59 . 30 6.88£ 7 Bessel ... 344 39.0 6 52 38.98 +2.07 8 Mars' . . . N.P. 36.6 6 53 36.58 — 3.93| 57.60 6.00J 9 Bessel ... 344 41.0 6 54 40.98 +1.93 10 Mars . . . S.F. • • 39.8 • • • • 6 55 39.78 — 4.92J 58.80 6.85} 11 Bessel ... 344 51.2 t t . 6 56 51.18 +1.84 12 Mars . . . N.P. 6 57 48 58 4 13 57 40 5.97 13 Bessel ... 344 22.9 6 59 22.88 +1.73 14 Mars , . . S.F. • • • • 21.3 • • 7 0 21.28 — 5.04J 58.40 6;77J 15 Bessel . . . 344 . . 17.0 t t 7 3 16.98 +1.47 16 Mars . . . N.P. • ' • • 13.9 • • 7 4 13.88 —4.36 56.90 5.83 17 Bessel ... 344 40.3 . . 7 6 40.28 +1.33J 18 Mars . . . S.F. 38.0 7 7 37.98 — 5.26^ 57.70 6.60 19 a Bessel ... 344 . . . . 31.0 . . 7 9 30.98 +1.30 20 Mars . . . N.P. 27.3 • • 7 10 27.28 -4.49J 56.30 5.79^ 21 Bessel . . . 344 30.2 . 7 13 30.18 +1.08 22 Mars . . . S.F. 27.4 7 14 27.38 —5.41 57.20 6.49 23 Bessel . . . 344 , . . 39.4 7 15 39.38 +3.42 24 Mars . . . N.P. • • 35.2 • • 7 16 35.18 —2.27 +55.80 -5.69 AT SANTIAGO DE CHILE. 131 JANUARY 30, 1833-foullnned. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Stir. Bar. Thermometers. A. B. C. D. E. 4 a. A I. Air. Wet. _ K Rev. .. Rev. Inches. • • 25 36 37 38 39 30 31 32 33 34 55 36 37 38 39 40 41 I 42 43 11 45 c 46 47 48 49 50 51 • 53 54 55 56 57 58 59 60 61 62 63 64 65 66 d 67 68 69 70 Bcssel ... 344 Mars . . . 8.F. 34.1 7 17 34.08 7 18 31.08 7 19 21.48 7 20 17.18 7 21 11.58 7 23 8.38 7 23 24.58 7 24 20.08 7 25 36.98 7 26 33.48 7 28 45.58 7 29 41.58 7 30 50.88 7 31 46.48 7 32 55.08 7 33 49.98 7 35 54.48 7 36 50.38 73751.38 7 38 45.98 7 39 44.98 7 40 40.48 7 41 25.58 7 42 19.98 7 43 15.28 7 44 10.58 7 44 58.88 7 45 52.58 7 46 42.38 7 47 37.28 7 48 25.28 7 49 18.76 750 12.58 7 51 7.28 7 51 53.98 7 52 47.48 7 54 17.98 7 So 13.48 7 55 59.68 7 56 53.58 7 57 40.48 7 58 34.58 7 59 41.18 8 0 33.98 8 1 20.38 8 3 14. SS +3.39 —3.09 +3.33 —2.26 +3.27t —3.15 +3.17 —3.40 +3.06 —3.301 +2.91 — 2.56J +2.84 —3.43 +2.79 — 2.631 +2.691 —3.54 +2.63 —2.71 +2.59 -3.56 +2.561 —2.721 +3.511 -3.60 +2.48J — 2.72J +2.45 -3.58 +2.431 —2.73 +2.391 —3.57 +2.40 — 2.7fr +2.36 —3.58 +2.281 -2.76 +2.28 —3.66 +2.27 —S. 84 +2.22 —3.63 +57.00 55.70 56.80 55.50 56.50 56.00 55.60 54.90 55.90 54.69 55.50 54.40 55.30 53.70 54.90 53.50 54.70 53.50 54.50 52.90 54.10 52.80 +53.90 —6.48 5.59 6.42} 5.57 6.361 5.471 6.27 5.431 6.331 5.33 6.15 5.39 6.111 5.21 6.03 5.161 5.961 5.16 5.94 5.04} S.94 5.11 —5.85 37.953 Ther. ait. 68". 8 Bar. red. to 32« F. 27.844 65.0 58.5 31 1 Bessel ... 344 Miirs . . . N.P. 21 5 17 2 BesscI ... 344 Mars . . . 8.F. 11.6 • • Bessel ... 344 Mars . . N.P. Bessel ... 344 Mars . . . S.F. . . • • 20.1 • • Bcssel ... 344 Mars . . . N.P. Bessel ... 344 45 6 • • • • 41.6 50 9 Bessel ... 344 Mars . . . N.P. • • • • 55.1 lii'sscl . . . 344 Mars . . . S.F. • • • • 54.5 50 4 • • • • Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mare . . . N.P. Bessel ... 344 Mars . . . S.F. • • 51.4 46.0 • • • • • • 40.5 25 6 . . . . 30.0 15.3 • • Bessel ... 344 Mara . . . N.P. Bcssel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. . t f t 58.9 52.6 4-2.4 37.3 85.3 18.8 12.6 7 3 • • • • Bessel ... 344 Mars . . . N.P. • • • • 54.0 47.5 Bessel ... 344 Mara . . . S.F. • • • • 18.0 • • Bessel . . . 344 Mars . . . N.P. • • • • 59.7 52 6 • • Bessel ... 344 Mars . . . S.F. • • • • 40.5 • • • • Bowl . . . 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. • • • • 41.2 34.0 20.4 14.3 • • • • 132 OPPOSITION OF MARS, 1851-52, JANUARY 30, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. Jj. E. A a. At. Air. : Wet. s. s. s. s. s. h. m. s. Rev. s. Rev. Inches. • O 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99e 100 101 102 / 103 104 105 106 107 108 109 110 111 112 113 114 115 116 Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mara . . . S.F. Bessel ... 344 56.8 8 2 56.78 8 3 49.48 8 18 27.48 8 19 19.58 8 21 0.98 8 22 52.48 8 22 41.98 8 23 33.98 8 24 26.78 8 25 17.78 8 26 47.98 8 27 40.18 8 28 49.78 8 29 40.48 8 30 24.18 8 31 15.48 8 32 6.78 8 32 57.48 8 33 43.28 8 34 34.98 8 35 36.98 8 36 27.08 8 37 50.88 8 38 42.28 8 39 51.08 8 40 40.98 8 41 36.98 8 42 27.98 8 43 20.48 8 44 9.98 8 47 53.58 8 48 43.18 8 51 55.18 8 52 44.48 8 53 53.18 8 54 42.98 8 55 58.28 8 56 46.98 8 58 9.28 8 58 59.28 8 59 57.58 9 0 46.38 9 2 1.48 9 2 51.18 9 3 53.48 9 4 41.98 +2.26 -2.73J +2. IS —3.34 +2.22J —2.50 +2.20J —3.32 +2.25 —2.41 +2.26 —3.20 +2.21 — 2.35J +2.19J — 3.19J +2.26 — 2.26J +2.28J —3.09 +2.32 — 2.12J +2.35 —2.94 +2.46J — 1.98i +2.42J — 2.78J +2.5IJ — 1.86i +2.72 — 1.61J +2.81 — 1.50J +1.021 — 4.04J +1.13i — 3.C5J +1.20 —3.81 +1.28 — 2.87| +!•«* —3.60 +1.411 — 2.63i +52.70 52.10 51.50 52.00 51.00 52.20 50.70 51.30 50.70 51.70 50.10 51.30 49.90 51.00 49.50 49.60 49.30 49.80 48.70 50.00 48.80 49.70 +48.50 — 4.991 5.52 4.72i 5.51J 4.66 5.46 4.56J 5.39 4.52J 5.37J 4.44J 5.29 4.45 5.22 4.38 4.33J 4.311 5.07 4.19 5.01 4.151 5.001 —4.05 27.953 Ther. att. 60°. 8 Bar. red. to 32° F. 27.844 27.938 Ther. att. 68°. 2 Bar. red. to 32° F. 27.830 65.0 61.0 58.5 57.5 49.5 27 5 • • • • 19.6 1 0 • • • • 52.5 Bessel ... 344 Mara . . . S.F. Bessel ... 344 • • 42.0 34.0 36.8 17.8 Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. Bessel . . . 344 Mars . . . S.F. Bessel ... 344 48 0 40.2 49.8 40.5 24. 2 15.5 6.8 57.5 • • • • Bessel ... 344 Mars . . . S.F. Bessel ... 344 35.0 37.0 27 1 . . . . Bessel . . . 314 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. Bessel . . . 344 Mars . . . S.F. • • 51.0 42.3 51.1 41.0 37.0 28.0 • • Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mara . . . N.P. Ressel . . . 344 Mars . . . N.P • • 20.5 10.0 53.6 43.2 55.2 44 5 • • • • Bessel ... 344 Mars . . . S.F. • • 53.2 43.0 Bessel ... 344 Mara . . N.P. 58.3 47.0 • • • • Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N P 9.3 59.3 57.6 46 4 • • • • Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. • • • • 1.5 51.2 53.6 42.0 • • • • AT SANTIAGO DE CHILE. 133 JANUARY !JO, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. O. I). E. An. A prt" for chronometer at 7 0 . —2 58.26 6 56 56 96 Correction for chronometer at 7 5 . . . —2 58.27 7 2 15 61 5 18 65 A P. F. limbs in A. R. reduced to arc . . . 17.92 A N. S. limbs micr. in rev. . . . . 0.965=18.81 Variation of A. R. in 5m. 19s . . — 5.54 Variation of declination in 5m. 19s. . — 1.51 Observed P. F. diameter . . 12.38 • Corr. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 15.10 h. m. » b. m. H A o at 6 55 . . 0.18 A a at 7 1 . 0.19 JANUARY 33, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ad Air. Wet. 8. s. s. s. s. h. m. s. Rev. m. B. Rev. Inches. • • 1 2 Washington . . . Mars . . . S.F. 49.5 22.5 2.5 35.3 15.5 48.0 28.1 0.5 41.3 13.8 7 9 15.38 7 11 48.02 +3.04 7.151 +2 32.64 +4.1H 27.991 61.5 57.2 3 4 5 1.8 33.2 0.5 14.5 46.0 13.3 27.3 58.5 26.0 40.3 11.3 38.8 7 14 14.56 7 16 45.86 7 19 13.20 2.95 7.94 2.74 2 31.30 4.99 Flier, att. 68°. 5 Bar. red. to 32° F. 27.883 Mars . . . N.P. Washington . . . 20.3 47.4 6 Mars . . . S.F.' 19.5 32.4 45.2 58.0 11.0 7 21 45.22 6.92 2 32.02 4.18 7 8 9 Washington . . Mars . . . N.P. 33.2 36.0 6.5 47.0 48.8 19.3 0.0 1.5 32.8 12.8 14.5 45.0 25.8 7 24 48.80 7 27 19.28 7 29 59.98 2.26£ 7.42i 2.10 2 30.48 5.16 Washington . . . 34.3 10 Mars . . . S.F. 5.5 18.4 31.2 44.0 57.0 7 32 31.22 6.44i 2 31.24 4.34J 11 Washington . . 10.3 23.1 36.0 48.8 1.7 7 34 35.98 1.93J 12 13 14 Mars . . . N.P. Washington . 39.8 52.8 0.5 31.0 5.7 13.2 43.6 18.5 26.0 56.4 31.3 39.0 9.4 7 37 5.62 7 39 13.26 7 41 43.68 7.25J 1.86J 6.25 2 29.64 2 30.42 5.32 4.38J Mars . . . S.F. 18.0 15 Washington . . . 15.5 28.3 41.2 54.0 6.8 7 43 41.16 1.76} 16 Mars . . . N.P. 44.5 57.3 10.3 23.0 35.7 7 46 10.16 7.26J 2 29.00 5.50 17 Washington . . . 47.5 1.2 13.8 26.5 39.6 7 48 13.72 1.73 18 Mars . . . S.F. 18.0 31.0 43.7 56.5 9.5 7 50 43.74 6.39 2 30.02 4.66 19 Washington . . . 27.2 40.0 52.8 5.6 18.5 7 52 52.82 1.66 20 Mars . . . N.P. 85. 5 8.4 21.2 34.0 47.0 7 55 21.22 7.22 2 28.40 5.56 21 Washington . . . 6.7 19.7 32.5 45.4 58.3 7 58 33.52 1.61 22 Mars . . . S F. 36.0 49.0 1.8 14.5 27.4 8 1 1.74 6.38 229.22 4.77 23 Washington . . . 31.5 44.4 57.2 10.0 23.0 8 2 57.22 1.57 24 Mars . . . N.P. 59.2 12.0 24.8 37.6 50.5 8 5 24.82 +7.28 -^2 27.60 +5.71 AT SANTIAGO DE CHILE. 135 JANUARY aa, 1853— Continued. s Chronometer time of transit. M:-_ Planet— Star. Thermometers. 1 Object. A. B. C. D. E. mcr. Bar. & A a. A"*. Air. Wet. 6 s. 8. s. s. s. h. m. s. Rev. m. 8. Rev. Inches. • • 35 Washington . . . 53.4 6.2 19.0 31.8 44.6 8 7 19.00 +1.55 27.991 61.5 57.9 26 Mars . . . S.F. 21.6 34.8 47.5 0.3 13.4 8 9 47.52 6.49 +2 28.52 +4.94 27 Washington . . . 17.5 30.3 43.2 55.8 8.8 8 1] 43.12 1.61 Ther. att. 68° .5 28 Mars . . . N.P. 44.3 57.2 10.0 22.8 35.5 8 14 9.96 7.47 2 36.84 5.86 Bar. red. to 32° F. 39 Washington . . . 7.4 30.2 33.0 46.0 58.8 8 17 33.08 1.34 27.883 30 a Mars . . . S.F. 35.0 47.5 0.4 13.5 26.4 8 20 0.56 6.46 2 27.48 5.12 31 Washington . . . 28.5 41.3 54.3 7.0 20.0 8 21 54.22 1.41 32 a Mars . . . N.P. 54.6 7.5 20.5 33.4 46.4 8 24 20.48 7.42 2 36.36 6.01 33 55.2 8.0 21.0 34.0 8 26 8 13 1 -IA 34 a Mars . . . S.F. 9.5 22.5 35.3 48.0 1.0 8 28 35.26 I ,to 6.63 2 27.13 5.15 35 Washington . . . 10.5 23.4 36.2 49.0 1.9 8 30 36.20 1.52 36 a Mars . . . N.P. 36.0 49.0 2.0 14.6 27.5 8 33 1.83 7.63 3 25.62 6.11 37 Washington . . . 34.3 47.1 0.2 12.7 25.5 8 35 59.96 1.65 38 Mars . . . S.F. 0.8 13.5 36.5 39.3 52.3 8 38 26.48 6.94 226.52 5.29 39 Washington . . . 16.1 29.0 42.0 54.8 7.5 8 40 41.88 1.74} 406 Mars . . . N.P. 41.2 54.0 6.7 19.5 32.5 8 43 6.78 8.02} 224.90 6.28 41 Washington . . . 13.3 26.0 39.0 51.8 5.0 8 45 39.00 —2.97 42 Mars . . . S.F. 39.0 52.0 4.8 17.5 30.4 8 48 4.74 +3.44 225.74 5.41 43 Washington . . . 57.3 10.1 22.9 35.6 48.6 8 50 22.90 —2.95} 44a Mars . . . N.P. 21.5 34.5 47.1 59.6 12.8 8 52 47.10 +3.43 2 24.20 6.35} 45 Washington . . . 41.0 54.0 6.8 19.5 32.5 8 55 6.76 —2.75} 46 Mars . . . S.F. 6.2 19.2 32.0 44.6 57.7 857 31.94 +2.87 2 25.18 5.62} 47 48 c Washington . . . Mars . . . N.P. 56.5 20.2 9.5 33.0 22.4 45.8 35.1 58.5 48.0 16.5 8 59 22.30 9 1 45.80 —2.62 +3.87 2 23.50 6.49 27.980 61.0 58.8 49 5.3 18.2 31.0 44.0 9 4 18.21 —2.45 Ther. an. 67°. 5 oo« Mars . . . S.F. 17.0 39.6 42.5 55.3 8.2 9 6 42.52 +3.29 2 34.31 5.74 Bar. red. to 32° F. 51 15.7 28.5 41.5 54.2 9 g 28.56 2.25} 27.875 52 c Mars . . . N.P. 35.5 38.4 51.4 4.1 17.0 9 10 51.28 +4.38 +922.72 +6.63} Remarks. Unless when otherwise noted, the planet has generally been sharp and steady, and the measures very fair. The star does not appear so bright i many of BessePs 9ths; but from the faintness of the colored portions of Mars, there in evidently some haze, or my eye is over worked, a Tremulous. 6 Recorded 4.0s. at wire It. c Fine. Results. h. m. «. m. 9. Hi-v. / // Mean S. P. . . Thirteen transits . . 8 9 54.05 + 228.496 . . . +4.902 . . . . =1 S5.54 Mean N. P. . . Thirteen transits . . 8 14 38.47 + 226.958 . . . +5.845 . . . . =1 53.93 h. m. m. B. h. m. a. Correction for chronometer at 8 10 . . . —3 0.94 Santiago Rid. time S.F . . 8 633.11 rl f o * A 3 0 95 Santii£o sid lime N P. . . . 811 27.52 Correction lor chronometer at o 14 . • 4 34.41 // it A P. F. limbs in A. R. reduced to arc . . 33.07 A N. S. limbs micr. in rev. . . . . 0.943 = 18.38 Variation of A. R. in 4m. 34s . - 4.79 Variation of declination in 4m. 34j. . — 1.88 Observed P. F. diameter ..*... 18.28 Corr. for diam. of mirr. wires . . — a.ao Observed N. .S. diameter .... 14.96 h. m. // h. m. II A o at 8 6 . 0.0» A f at 8 10 .... 0.11 136 OPPOSITION OF MARS, 1851-52, JANUARY 33, 1852. « Chronometer time of transit. Micr. Planet— Stan Bar Thermometers. iS £ Object. A. B. C. D. E. A a. A& Air. Wet. 1 6 s. s. s. 9. B. il. III. S. Rev. m. s. Rev. Inches. . • K 1 Washington . . . 59.0 11.8 24.6 37.4 50.3 6 55 24.62 +3.591 28.064 64.0 58.1 2 Mars . . . S.F. 0.5 13.5 26.3 39.0 52.3 6 58 26.32 —3.33 +3 1.70 —6.921 Ther. att. 3 Washington . . . 14.0 26.9 39.8 53.5 5.6 7 0 39.76 +3.38 69°. 5 4 Mars . . . N.P. 14.3 27.0 40.2 52.7 5.5 7 3 39.94 —2.651 3 0.18 6.031 Bar. red. to 32° F. 27.953 5 Washington . . . 36.5 49.5 2.3 15.0 28.0 7 6 2.26 +3.19 6 Mars . . . S.F. 37.5 50.3 3.2 16.0 29.0 7 9 3.20 —3.65 3 0.94 6.84 7 Washington . . . 33.5 46.4 59.3 12.0 25.0 7 11 59.24 +3.051 • 8 Mars . . . N.P. 33.2 46.1 59.0 11.7 24.6 7 14 58.92 —2.841 2 59.68 5.90 9 Washington . . . 33.6 46.5 59.5 12.4 25.3 7 17 59.46 +2.83 10 Mars . . . S.F. 33.8 46.7 59.5 12.3 25.5 7 20 59.56 —3.87 3 0.10 6.70 11 Washington . . . 43.0 55.9 8.6 21.4 34.6 7 23 8.70 +2.62 13 Mars . . . N.P. 41.7 54.5 7.4 20.1 33.2 7 26 7.38 —3.14 ' 2 58.68 5.76 13 Wa.-hington . . . 41.5 54.4 7.2 20.0 33.0 7 28 7.22 +2.40 14 Mars . . . S.F. 40.8 53.5 6.5 19.2 33.3 7 31 6.46 —4.12 2 59.24 6.52 15 Washington . . . 50.8 3.5 16.4 29.4 42.5 7 33 16.52 +2.24 16 Mars . . . N.P. 48.5 1.4 14.5 27.2 40.2 7 36 14.36 —3.33 2 57.81 5.57 17 Washington . . . 45.5 58.2 11.0 24.3 37.0 7 38 11.20 +2.07 18 Mars . . . S.F. 44.0 57.0 9.8 22.5 35.5 7 41 9.76 —4.29 2 58.56 6.36 19 Washington . . . 22.5 48.4 14.3 7 43 48.39 +2.05 20 Mars . . . N.P. 19.5 32.4 45.3 58.0 11.0 7 46 45.24 —3.39 2 56.85 5.44 21 Washington . . . 53.0 5.9 18.8 31.6 44.fi 7 49 18.78 +1.98 23 Mars . . . S.F. 51.0 3.6 16.5 29.3 42.3 7 52 16.54 —4.26 2 57.76 6.24 33 Washington . . . 57.8 10.7 23.6 36.5 49.5 7 54 23.62 +1.901 24 Mars . . . N.P. 54.0 6.8 19.6 32.4 45.4 7 57 19.64 —3.401 2 56.02 5.31 25 Washington . . . 55.0 7.8 20.7 33.5 46.5 7 59 20.70 +1.86 26 Mars . . . S.F. 52.0 4.8 17.5 30.5 43.5 8 2 17.66 —4.24 2 56.96 6.10 27 Washington . . . 11.6 24.4 37.4 50.3 3.4 8 4 37.42 +1.84 28 1 Mars . . . N.P. 7.0 20.2 33.0 45.7 58.5 8 7 32.88 —3.30 2 55.46 5.14 29 Washington . . . 51.5 4.5 17.4 30.3 43.4 8 10 17.42 +1.83 30 Mars . . . S.F. 48.0 0.7 13.5 26.3 39.4 8 13 13.58 —4.09 2 56.16 5.92 n Washington . . . 45.5 58.4 11.3 24.0 37.0 8 15 11.24 +1.88J 32 Mars . . . N.P. 40.3 53.2 6.1 18.6 31.5 8 18 5.94 —3.111 2 54.70 5.00 33 Washington . . . 3.2 16.2 29.0 41.7 54.6 8 20 28.94 .+1.90 34 Mars . . . S.F. 58.7 11.5 24.5 37.2 50.2 8 23 24.42 —3.88 2 55.48 5.78 35 Washington . . . 14.7 27.6 40.5 53.4 6.5 8 25 40.54 +1.97 36 Mars . . . N.P. 8.5 21.4 34.3 47.2 0.2 8 38 34.32 —2.92 2 53.78 4.89 37 Washington . . . 34.3 47.2 0.0 12.8 26.0 8 31 0.06 +0.99 38 Mars . . . S.F. 29.0 • • 54.7 7.5 20.5 8 33 54.70 —4.65 2 54.64 5.64 39 Washington - . . 19.8 33.6 46.4 59.5 12.3 8 35 46.32 +1.08 40 Mare . . . N.P. 14.0 26.8 39.6 52.5 5.5 8 38 39.68 —3.571 2 53.36 4.651 41 Washington . . . 44.5 57.4 10.3 23.3 36.0 8 41 10.28 +1.231 42 Mars . . . S.F. 38.5 51.4 4.3 18.0 30.3 8 44 4.50 —4.28 2 54.22 5.511 43 Washington . . . 26.0 38.9 51.5 4.5 17.5 8 48 51.66 +1.501 44 Mars . . . N.P. 18.2 31.0 43.7 Bs.a 9.6 8 51 43.86 —3.12 2 52.20 4.621 45 Washington . . . 37.5 50.3 3.3 16.2 29.2 8 55 3.30 +1.63 48 Mars . . . S.F. 30.5 43.2 56.0 8.8 31.8 8 57 56.06 —3.651 +2 52.76 —5.281 AT SANTIAGO DE CHILE. 137 JANUARY 33, 1853— Continued. o Chronometer time of transit. Planet— Star. Thermometers i <£ £ Object. A. B. C. D. E. An. Ai. Air. Wet. k £ 6 2 8. s. (*. B. 8. h. m. s. Rev. m. s. Rev. Inches. • • 47 Washington . . . 31.5 44.6 57.5 10.2 23.2 8 59 57.40 +1.87 28.050 60.7 56.0 48 Mars . . . N.P. 23.0 36.0 48.8 1.6 14.5 9 2 48.78 —2.501 +2 51.38 — 4.37J Ther. att 49 Washington . . 33.4 46.2 59.1 12.0 84. 8 9 6 59.10 +2.04 67°. 5 50 Mars . . . S.F. 25.5 38.3 51.0 3.8 17.0 9 9 51.12 -3.07J 2 52.02 5. Hi Bar. red. to 32° F. 27.945 51 Washington . . . 11.5 24.4 37.3 50.2 3.2 9 11 37.32 +2.30J 52 Mars . . . N.P. 2.0 14.9 27.8 40.6 53.5 9 14 27.76 —1.96 +2 50.44 — l.S6i Remarks. Objects a little blurred and tremulous at times, but throughout the measures have been satisfactory. The star is certainly very small for an 8th, and its difference of declination is scarcely more than half what it ought to be by the Ephemeris. However, the Washington observations were only approximate. There is no other star corresponding near so well. a Fine. Results. h. m. s. m. s. Rev. t it , - 8 2 54 15 \ 58.34 Mean S. F. . . Thirteen transits . Mean N. P. . . Thirteen transits . 8 8 13.75 + 255.428 .... S.131 . . . . —1 40.00 h. m. m. 8. h. m. s. 3 4 31 7 59 49.84 Correction for chronometer at 8 3 . O A "X> 8 5 9.43 Correction for chronometer at 8 8 . . — <> l.tEi . . 5 19.59 It // A P. F, limbs in A. R. reduced to arc . . . 23.05 A N. S. limbs micr. in rev . 0.941 = 18.34 . . — 5.60 Variation of declination in 5m. 20«. . — 1.40 Observed P. F. diameter ..... . . 17.45 Corr. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 14.74 h. m. // h. m. n A a at 7 58 . . 0.12 A <> at 8 4 .... 0.10 JANUARY a*, 1883. t Chronometer time of transit. Micr Planet— Star. Bar. Thermometers. 1 Object. A. B. C. D. E. An. A A Air. Wet. £ d s. s. s. s. 8. h. m. s. Rev. m. a. Eev. Inches. 4 a 1 Bessel ... 344 44.5 6 50 44.48 + 9.2Si 28.009 65.0 58.4 2 Mars . . . S.F. . . 54.5 6 51 54.48 —13.42 + 1 10.00 -22.64i Ther. att. tiii .11 3 4 Bessel ... 344 Mars . . . N.P. 55.0 3.5 . . • • 6 53 54.98 6 55 3.48 + 8.71 —12.58 1 8.50 21.29 Bar. red. Mil- F. 37.900 5 Bessel ... 344 39.5 48.8 6 57 39.48 6 58 48.78 + 9. 2S -13.38 1 9.30 22.66 7 Bessel ... 344 53.5 1.2 • ' 7 1 53. 48 7 3 1.18 +11.16 -10.78 1 7.70 21.94 9 10 Bessel ... 344 Mars . . . S.F. 36.3 45.3 • . 7 6 36.28 7 7 45.28 — 11.861 +1 9.00 —22.59 18' 138 OPPOSITION OF MARS, 1851-52, JANUARY 24, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. c. D. E. A a. A A Air. Wet. s. 8. s. s. s. h. m. s. Rev. m. s. Rev. Inches. • O 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 Bessel ... 344 43.7 7 9 43.68 7 10 51.18 7 12 21.98 7 13 30.48 7 15 35.98 7 16 42.98 7 19 30.78 7 20 38.48 7 23 24.48 7 24 30.78 7 26 44.58 7 27 51 .98 7 30 0.48 7 31 6.08 7 32 21.58 7 33 28.28 7 36 29.98 7 37 35.48 7 39 37.48 7 40 44.28 7 42 46.98 7 43 52.58 7 45 19.98 7 46 25.98 7 47 41.68 7 48 46.48 7 50 3.98 7 51 9.68 7 54 34.98 7 55 38.98 7 57 9.48 7 58 14.98 8 0 8.98 8 1 12.98 8 3 10.68 8 4 15.48 8 8 49.48 8 9 52.28 8 11 13.28 8 12 17.28 8 15 14.38 8 16 16.88 8 17 30.48 8 18 33.98 8 19 51.48 8 20 55.48 +10.61 — n. on + 10.39 —12.09 +10.37 —11.231 +10.11 —12.33 + 9.65 — 11.73$ + 9.57J —12.731 + 9.37-1 —11.83 + 9.381 —12.84 + 9.29 —11.98 + 9.131 —12.93 .+ 9.10J —11.98 + 9.08 —12.97 + 9.06 —12.02J + 9.03 —12.98 +10.19 —10.781 +10.10 —11.82 +10.09 —10.82 + 10.03 -11.74 + 9.41J —11.37J + 9.42 — 12.20i + 9.42 —11.20| + 9.45 —12.11 + 9.50J —12.03 + 1 7.50 1 8.50 1 7.00 1 '7.70 1 6.30 1 7.40 1 5.60 1 6.70 1 5.50 1 6.80 1 5.60 1 6.00 1 4.80 1 5.70 1 4.00 1 5.50 1 4.00 1 4.80 1 2.80 1 4.00 1 2.50 1 3.50 + 1 4.00 —21.621 22.48 21.50J 22.44 21.384 22.31 21.20J 22.221 21.27 22 061 21.081 22.05 21.08J 22.11 20.971 21.92 20.91 21.77 20.79 21.621 20.621 21.56 —21.531 28.009 Ther. att 69°. 0 Bar. red. to 32° P. 27.900 65.0 58.4 51.2 Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mare . . . N.P Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars N.P • • • • 22.0 30.5 36.0 43.0 30.8 38.5 24.5 30.8 • • . . Bessel ... 344 Mars . . . S.F. 44.6 52.0 • • Bessel ... 344 0.5 6.1 Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. • • • • 21.6 28.3 30.0 35.5 37.5 44.3 • • • • Bessel ... 344 Mars . . . N.P. • • • • 47.0 52.6 • • Bessel ... 344 Mare . . . S.F. • • 20.0 26.0 Bessel ... 344 Mare . . . N.P. Bessel ... 344 Mars . . . S.F. • • • ' 41.7 46.5 4.0 9.7 • • • • Bessel ... 344 Mars , . . N.P. 35.0 39.0 • • Bessel . . . 344 Mars . . . S.F. Bessel ... 344 Mare . . . N.P. Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. 9.5 • • 15.0 9.0 • • • • • • 13.0 10.7 • • • • 15.5 49.5 • • 52.3 13.3 17.3 . . Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. Bcssi'l ... 344 Mars . . . S.F. • • 14.4 16.9 30.5 34.0 51.5 • • • • • • 55.5 AT SANTIAGO DE CHILE. 139 JANUARY 31, 1 vv> < „„!!„, ,, ,|. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. An. At Air. Wet. Rev. m. s. Rev. Inches. « • 57 58 59 60 61 n 63 64 65 6(i 17 68 69 70 71 72 73 74 75 76 77 78 79 60 n 82 83 84 85 86 87 88 89 90 91 92 Bessel . . . 344 Mars . . . N.P. 3.8 8 23 3.78 8 24 5.58 8 25 40.18 8 26 42.08 8 29 35.58 8 30 37.98 8 32 43.98 8 33 45.18 8 35 22.38 8 36 23.98 8 37 54.28 8 38 55.48 8 40 37.48 8 41 39.48 8 43 35.98 8 44 36.48 8 46 17.48 8 47 19.08 8 48 41.48 8 49 41.38 8 51 25.48 8 5227.18 8 56 4.48 8 57 3.98 8 59 1.58 9 0 1.98 9 1 36.48 9 2 35.48 9 4 45.98 9 5 46.38 9 7 53.48 9 8 51.98 9 10 6.98 9 11 6.98 9 12 35.98 9 13 34.28 + 9.48J —11.05 + 9.55 —11.04 + 9.50 —11.90 + 9.54 —10.85 + 9.581 —11.62 + 9.68 —10.721 + 9.72 —11.48 + 9.78 —10.53 + 9.86 —11.271 + 9.951 —10.25 +10. Olt — 11.03i +10.20 — 9.941 +10.311 —10.71 +10.43 — 9.631 +10.53 —10.361 +10.73 — 9.231 +10.83 —10.00 +10.95J -8.99 +1 1.80 1 1.90 1 2.40 1 1.20 1 1.60 1 1.20 1 2.00 1 0.50 1 1.60 0 59.90 1 1.70 0 59.50 1 0.40 0 59.00 1 0.40 0 58.50 1 0.00 +0 58.30 —20.531 20.59 21.40 20.39 21.201 20.40} 21.20 20.31 21.131 20.201 31.05 20.141 21.021 20.061 20.891 19.961 20. 83 —19.941 28.000 Ther. alt. 68". 0 Bur. ri'd. to m° F. 27.993 59.2 58.0 5 6 Bessel . . . 344 Mars . . . N.P. 40 2 48.1 Bcsscl ... 344 Mars . . . S.F. Vessel ... 344 Mars . . N.P. Bcssol ... 344 Mais . . . 8. P. BPKSO! ... 344 Mars . . . N.P. 35.6 • • 38.0 44 0 • • 45.3 22 4 • • • • 24.0 55 5 Besscl . . . 344 Mars . . . g.F. Ilivsd ... 344 Mars . . . N.P. • • • • 37.5 39.5 • • Bessel . . . 344 .Milrs . . . S.F. 17 5 Bessel . . . 344 Mars . . . N.P. 41 4 Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. • • • • 4.5 • Bessel ... 344 Mars . . . S.F. 2 0 Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. 46 0 Bcsscl ... 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. • • • • 53.5 52.0 7.0 7.0 36.0 34.3 • • • • Remarks. At the commencement and during the first hour, the images were quite blurred and unsteady ; but afterwards eitremcly sharp and their motion! equable. The great difference of Dec. of the objects and small difference of A. R. required such a rapid movement of Uie micrometer screw, that the measures are not very satisfactory. There is, no doubt, some parallax also. Results. Mean S .F. . Meau N. P. . Twenty-three transits . Twenty-three transits . h. m. s. . 8 3 59.47 . 8 7 50.58 m. >. + 1 4.739 + 1 3.200 Rev. . . . —21.771 . . . . . . -20.837 . . . . =7 4.34 . ^-6 46.11 140 OPPOSITION OF MARS, 1851-52, JANUARY 24, 1853— Continued. Results — Continued. h. m. Correction for chronometer at 8 4 . Correction for chronometer at 8 8 . . A P. F. limbs in A. R. reduced to arc . . Variation of A. R. in 3m. 51j Observed P. F. diameter h. m. m. e. . —3 6.99 . —3 6.99 // 23.08 . — 4. OS 19.06 // 0.40 h. m. B. 8 0 52 48 8 4 43 59 , . . 3 51 11 A N. S. limbs mier. in rev Variation of declination in 3m. 51s. Corr. tor diani. of micr. wires . . . // . 0.934 = 18.21 , . — 0.99 — 2.20 15.02 h. m. A o at 8 4 // .... 0.38 JANUARY 35, 1853. V V Chronometer time of transit. Planet— Star. Thermometers. s Vlein ofw' Micr. Bar I B Object. A. B. c. D. E. A a. A <5. Air. Wet. 1 d 2 s. 8. s. 8. s. h. m. s. Rev. s. Rev. Indies. 0 . la Mars . . . S.F. , t 52.0 ! t 6 47 51.98 —7.56} 28.005 63.0 58.0 3 Bessel ... 344 . . 23.5 . . 6 48 23.48 3.56 —31.50 —4.004 Ther. alt 3 Mara . . . N.P. 25 5 6 50 25.48 6.75} 68° .2 4 Bessel ... 344 . . . . 58.5 . . 6 50 58.48 3.66 33.00 3.07} Bar. red to 32° F 27.897 5 20.4 6 53 20.38 7.64 6 Bessel ... 344 52.3 • . 6 53 52.28 3.78 31.90 3.86 7 Mars . . . N.P. 13.5 > 6 55 13.48 6.85 8 Bessel ... 344 46.6 • • • • 6 55 46.58 3.87 33.10 2.98 9 Mars . . . S.F. 46.5 . 6 57 46.48 7.82 10 Bessel ... 344 • • 18.5 • • 6 58 18.48 4.01 32.00 3.81 11 Mars . . . N.P. 40.4 6 59 40.38 6.97} 12 Bessel ... 344 13.5 7«0 13.48 4.06 33.10 2.91} 13 Mars . . . S.F. . . 14.3 . , 7 2 14.38 7.91 14 Bessel ... 344 • • • • 46.7 7 2 46.68 4.13} 32.40 3.77} 15 Mars . . . N.P. . . 44.5 7 3 44.48 7.07 16 Bessel ... 344 18.0 7 4 17.98 4.21 33 50 2.86 17 Mars . . . S.F. 47.2 7 5 47.18 8.03 18 Bessel ... 344 20.0 7 6 19.98 4.31 32.80 3.72 19 Mars . . . N.P. 21.6 7 7 21 58 7 1Q1 20 Bessel ... 344 55.5 7 7 55.48 1 . !»} 4.29 33.90 2.90} 21 Mars . . . S.F. 4.6 7 10 4.58 8.03 22 Bessel ... 344 • • 37.5 • • 7 10 37.68 4.38} 32.90 3.64} 23 Mars . . . N.P. . . . . 43.0 7 11 42.98 7.20 24 Bessel ... 344 • • • • 17.2 • • 7 12 17.18 4.43 34.20 2.77 25 Mars . . . S.F. 14.8 7 13 14.78 8.12 26 Bessel ... 344 • • 48.0 7 13 47.98 4.47 33.20 3.65 27 Mars . . . N.P. 0.9 . . 7 15 0.88 7.31 28 Bessel ... 344 • • 35.5 7 15 35.48 4.61 34.60 2.70 29 Mars . . . S.F. 32.5 7 16 32.48 8.28 30 Bessel . . . 344 5.5 7 17 5.48 4.67 33.00 3.61 31 Mare . . . N.P. . . 38.8 . 7 18 38.78 7.39 33 Bessel ... 344 • • 13.5 • • 7 19 13.48 4.73} 34.70 2.65} 33 Mars . . . S.F. . . 8.0 7 23 7.98 8.46 34 Bessel ... 344 42.0 • • • • 7 23 41 .98 —4.91 -34.00 —3.55 AT SANTIAGO DE CHILE. 141 JANUARY US, 1858— Continued. No. for reference. Object. Chronometer time of transit. Hean of wires. Micr. Planet — Star. Bar. 'liermometers. A. B. c. 1). E. An. 44 Air. Wet. s. 8. B. s. s. h. in, s. tti.-v. 8. Rev. Inches. o • 35 36 37 38 39 40 411 42 43 44 45 46 47 c 48 49 50 51 52 53d 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 Mars . N.P. 4.7 7 25 4.68 7 25 40.18 7 26 39.98 7 27 14.28 7 28 16.48 7 28 51.98 7 30 57.48 '7 31 31.98 7 32 33.48 7 33 9.18 7 34 3.68 7 34 38.28 7 35 31.18 7 36 7.28 7 37 35 68 7 38 10.58 7 39 15.58 7 39 52.08 7 40 53.38 7 41 28.58 7 42 25.58 7 43 2.18 7 44 5.68 7 44 41.18 7 45 32.68 7 46 9.28 7 47 28.58 7 48 4.48 7 48 45.48 7 49 22.48 7 50 3.18 7 50 38.98 7 51 21.58 7 51 58.98 —7.531 4.96) 8.46 5.05 7.61 5.09 8.49 5.13 7.68 5.23 8.61 5.19 7.65 5.231 8.61 5.24 7.72 5.301 8.59 5.381 7.73 5.37 8.631 5.42 7.76 5.39 8.621 5.43 7.78 S.471 8.691 5.49 7.751 —5.51 —35.50 34.30 35.50 34.50 35.70 34.60 36.10 34.90 36.50 35.20 36.60 35.50 36.60 35.90 37.00 35.80 —37.40 —2.57 3.41 2.52 3.36 2.45 3.43 2.411 3.37 2.411 3.201 2.36 3.211 2.37 3.191 2.301 3.201 —2.841 27.998 Ther. an. 66. '0 Bar. ted. to 32° F. 27.895 61.0 58.5 Bessel ... 344 Mars S F. • • 40.2 40.0 • • Bessel ... 344 • • 14.3 16 5 • • Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mars . . . S.F. Bessel ... 344 Mars . . . N.P. Bessel ... 344 Mars 8 F. • • 52.0 57.5 32.0 33.5 9 2 • • • • 3.7 38.3 31.2 7.3 35.7 • • • • Bessel ... 344 10 6 15 6 Bessel ... 344 52 1 53 4 Bessel ... 344 Mars . . . N.I'. Bessel ... 344 Mars S.F. . . , 28.6 25.6 2 2 . 5.7 K.-sM'l ... 344 Mars N P 41 2 30 7 Bessel . . 344 Mars . . . 8 F. liesscl ... 344 Mars . . . N.P. Bessel ... 344 Mars S F 9 3 • • 28.6 4 5 • • • • • • 45.5 22.5 3 2 • • • • Besnel ... 344 Mars . . . N P. Bessel ... 344 ;; 39.0 21.6 59.0 Remarks, a During the first twenty observations, the objects were ill-defmed and unsteady. b Sharp, but still unsteady, c Very fair. .• Good. Mean S.F. Mean N. P. Seventeen transits , Seventeen traiiMH . Results. h. m. 8. 7 21 16.93 V ei .>..•> I — 33.788 Rev. -3.529 -2.500 = 1 8.78 - 0 49.89 142 OPPOSITION OF MARS, 1851-52, JANUARY 35, 1853— Coiltiimed. Results — Continued. h. in. m. R. h. m. a. t 1 Ol 3 g . 55 7 18 7 38 Correction lor cnrononteier at * A\ . . 3 9.55 7 19 48 96 Correction lor chronometer at 7 M . . A P. F, limits in A. R. reduced to arc . . . 19. as A N. S. limbs raicr. in rev 0.969= 18.89 Variation of A. R. in 1m. 42s. . . . . . — 1.78 Variation of declination in Int. 42s. — 0.42 Observed P. F. diameter . . 18.17 Corr. for diam. of micr. wires . . . — 2.90 Observed N. S. diameter 16.27 h. m. // . . 0 07 h. m. // 0 05 JANUARY 36, 1853. There is no star in the place assigned to that in the Ephemens. The nearest one toil is a star of the 14th or 15th magnitude, (just visible,) which is about 12s. farther east and 30" north. Of course, it would not bear illumination, and no observations were attempted. JANUARY «7, 1853. i Chronometer time of transit. Planet— Star. Thermometers. m Vfpan of wires Micr. Bar 1 Object. A. B. C. D. E. A a. A A Air. Wet. I CS i s. s. s. 8. s. h. m. s. Rev. m. s. Rev. Inches. 0 - i Mare . . . S.F. 2.5 15.5 28.2 41.0 54.0 6 7 28.24 —3.82 28.000 67.5 59.5 2 Washington . . . 1.8.5 21.8 34.5 47.4 0.5 6 10 34.54 +3.41 —3 6.30 —7.23 Ther. alt. 3 Mars . . . N.P. 23.5 36.3 49.2 20.0 15.0 6 12 49.20 —3.42 70°. 4 4 Washington . . . 31.5 44.4 57.3 10.0 23.0 6 15 57.24 +3.00 3 8.04 6.42 Bar. red. to 32° F. 27.886 5 Mars . . . S.F. 29.2 42.2 55.0 7.6 20.7 6 17 54.94 —4.56 6 Washington . . . 36.5 49.5 2.3 15.0 28.0 6 21 2.26 +2.621 3 7.32 7.181 7 Mars . . . N.P. 34.6 47.6 0.3 13.0 25.3 6 23 0.36 —4.05 8 Washington . . . 43.5 56.5 9.5 22.5 34.0 6 26 9.30 +2.19 3 8.84 6.24 9 Mars . . . SF. 4.6 17.5 30.3 43.2 56.2 6 28 30.36 —5.27 10 Washington . . . 12.5 25.5 38.5 51.0 4.0 6 3L 38.30 +1.69 3 7.94 6.96 11 Mars . . . N.P. 37.3 50.2 3.0 15.8 28.7 6 34 3.00 —4.73 12 Washington . , . 46.5 59.6 12.5 25.4 38.5 6 37 12.50 +1.36 3 9.50 6.09 13 a Mars . . . S.F. 59.3 12.5 25.6 38.4 51.6 6 39 25.48 —5.83 14 Washington . . . 8.5 21.5 34.4 47.3 0.2 6 42 34.38 +1.02 3 8.90 6.85 156 Mars . . . N.P. 49.6 2.5 15.5 28.6 41.5 6 57 15.54 —1.831 16 Washington . . . 1.0 14.0 26.8 39.7 52.6 7 0 26.82 +4.03 3 11.28 5.86J 17 Mars . . . S.F. 52.8 5.7 18.6 31.5 44.6 7 2 18.64 —2.92 18 Washington . . . 3.2 16.5 29.4 42.0 55.0 7 5 29.22 +3.601 3 10.58 6.521 19 Mars . . . N.P. 10.6 23.5 36.3 49.3 2.2 7 7 36.38 —2.301 30 Washington . . . 22.5 35.4 48.4 1.5 14.3 7 10 48.42 +3.41 3 12.04 5.711 31 Mars . . . S.F. 18.6 31.6 45.0 57.2 10.5 7 12 44.58 —3.211 22 Washington . . . 30.0 43.0 55.6 8.6 21.6 7 15 5.5.76 +3.22 3 11.18 6. 43J 33 Mars . . . N.P. 20.6 33.5 46.7 59.3 12.0 7 17 46.42 —2.50 34 Washington . . . 33.2 46.2 59.0 11.8 25.0 7 20 59.04 +3.09 3 12.62 5.59 25 Mars . . . S.F. 25.0 38.0 51.0 3.7 16.8 7 22 50.90 —3.42J 36 Washington . . . 37.0 49.9 2.7 15.5 28.6 7 26 2.72 +2.94 3 11.82 6.361 27 Mars . . . N.P. 31.0 44.0 56.7 9.5 22.5 7 28 56.74 —2.661 38 Washington . . . 44.6 57.4 10.5 23.3 36.4 7 32 10.44 +2.761 —3 13.70 —5.43 I AT SANTIAGO DE CHILE. 113 JANUARY HI, lS53-Contllined. j Chronometer time of transit. \! ' -r Planet— Star. Thermometers <£ s £ Object. A. U. C. D. E. Micr. An. A 1. Bar. Air. Wet. d 2 s. s. 8. s. 8. h. m. s. Rev. m. 8. Rev. Inches. • « 39 30 Mars . . . S.F. Washington . . . 10.5 23.1 23.3 36.2 36.3 49.0 49.0 2.0 2.0 15.0 7 34 36.22 7 37 49.06 —3.57 +2.641 -3 12.84 —6.211 27.984 60.5 57.0 31 c Mars . . . N.P. 33.7 46.7 59.7 12.5 25.4 7 43 59.60 —8.80 Ther. att. 69°. 4 an 1.5 14.3 27.2 40.1 7 47 14.30 +2.481 3 14.70 5.281 Bar. rril. 10 31' F. 33 Mars . . . S.F. 55.6 8.8 21.6 34.6 47.7 7 49 21.66 —3.581 27.873 34 Washington . . . 10.0 22.7 35.9 48.6 1.5 7 52 35.74 +2.42 3 14.08 6.001 35 Mars . . . N.P. 25.2 38.0 51.0 3.8 16.8 7 55 50.96 —2.79 36 Washington . . 53.6 6.6 19.4 32.3 7 59 6.50 +2.34 3 15.54 5.13 37 d Mars . . . S.F. 13.5 26.4 39.2 52.0 5.3 8 1 39.28 —3.50 as Washington . . . 28.1 41.2 54.1 7.0 20.0 8 4 54.08 +2.321 3 14.80 5.821 39 Mars . . N.P. 29.6 42.6 55.5 8.2 21.2 8 6 55.42 —2.64 40 Washington . 46.0 58.8 11.8 24.6 37.5 8 10 11.74 +2.37 3 16.32 5.01 41 Mars . . . S.F. 5.6 18.7 31.5 44.3 57.3 8 14 31.46 —3.30 42 Washington . . . 21.5 34.4 47.4 0.2 13.0 8 17 47.30 +2.40 3 15.84 5.70 43 Mars . . . N.P. 10.5 23.4 36.4 49.2 2.1 8 19 36.32 —2.46 44 Washington . . . 27.6 40.6 53.5 6.4 19.3 8 22 53.48 +2.40 3 17.16 4.86 45 Mars . . . S.P. 38.0 51.0 4.0 16.6 39.8 825 3.88 — 3.101 46 Washington . . . 54.5 7.5 20.4 33.3 46.3 8 28 20.40 +2.461 3 16.52 5.57 47 Mars . . . N.P. 49.0 1.8 14.8 27.6 30.8 8 30 14.80 —2.19 48 Washington . . . 6.7 19.8 32.8 45.5 58.5 8 33 32.66 +2.42 3 17.86 4.61 49 Mars . . . S.F. 20.8 33.5 46.5 59.3 12.2 8 36 46.46 -4.081 50 Washington . . . 38.0 51.0 3.9 16.8 29.7 8 40 3.88 +1.32 3 17.42 5.401 51 Mars . . . N.P. 31.5 44.5 57.3 10.0 23.2 8 41 57.30 —3.101 52 Washington . . . 50.3 3.0 16.3 29.0 42.0 8 45 16.12 +1.45 3 18.82 4.551 53 Mars . . . S.F. 11.2 24 0 37.0 49.8 2.7 8 48 36.94 —3.15 54 Washington . . . 29.7 42.5 55.5 8.3 21.0 8 51 55.40 +2.14 3 18.46 5.29 55 Mars . . . N.P 23.7 36.6 49.4 2.0 15.0 8 54 49.34 —3.101 56 Washington . . . 43.2 56.3 9.3 22.0 35.0 8 58 9.16 +1.25 3 19.82 4.351 57 Mars . . . S.F. 27.6 40.6 53.5 6.3 19.5 8 59 53.50 —3.62 58 Washington . . . 47.0 59.8 12.9 25.7 38.6 9 3 12.80 +1.54 3 19.30 5.16 59 Mare . . . N.P. 24.0 36.8 49.8 2.6 15.5 9 5 49.74 —2.43 60 Washington . . . 44.5 57.5 10.4 23.2 36.1 9 9 10.34 +1.84* —3 20 60 —4.271 Remarks. A most superh night; the place of the compiring star is evidently 1m. too little in the Washington observations. . Magnifying power with all the rest, 235. il Mars passing along 9" or 10" to the north of a 10th magnitude star. a Sharp and steady. h First-rate. I cannot make better observations than those which follow. Results. Mean S. F. . Fifteen transits h. in. s. . 7 34 46.84 m. B. — 3 12.887 . . . . Re». ' " — 6.181 ... =9 0.47 Mean N. P. . . Fifteen transils . 7 41 22.74 — 3 14.443 . . . . — 5.295 . . . =1 43.40 h. m. Correction for chronometer at 7 3.". . . Correction for chronometer at 7 41 . . m. s. . —314.14 . —3 14.15 h. m. •. . . . . . . 7 31 33.70 Santiago sid. time N. P. 7 38 8.59 6 3D. Ml 114 OPPOSITION OF MARS, 1851-52, JANUARY 37, 1853— Continued. Results — Continued. A P. S. limbs in A. R. reduced to arc . . 23.34 A N. S. limbs micr. in rev . 0.886 = 17.27 Variation of A. R. in 6m. 36s — 6.88 Variation of declination in 6m. 36s. . - 1.53 Observed P. F. diameter 16.46 Corr. for diam. of micr. wires . — 2.20 Observed N. S. diameter .... 13.54 b. in. a h. m. it 0 12 A p at 7 40 . . . . 0.10 JAJftlARY 38, 1853. g Chronometer time of transit. Planet— Star. Thermometers. 1 Wpnn nf wirp« Micr. Bar. 1 h Object. A. B. C. D. E. An. A<5. Air. Wet. •S 6 s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. 0 0 !Z 1 H. C. . . . 16464 44.6 57.5 10.5 23.4 36.3 6 38 10.46 +3.32 27.990 66.6 55.2 2 Mara . . . S.F. 51.6 5.0 18.0 30.6 43.5 6 44 17.74 2.88 +6 7.28 —0.44 Ther. att. 3 H. C. . . . 16464 38.3 51.2 4 3 17.0 30.0 6 48 4.16 2.80 70°. 7 4 Mars . . . N.P. 43.8 56.8 9.6 22.4 35.3 6 54 9.53 3.31± 6 5.42 +0.51| Bar. red. to 32° F. 27.875 5 H. C. . . . 16464 10.0 23.0 35.8 4P.6 1.5 6 56 S5.78 2.424 6 Mars . . . S F. 15.8 28.8 41.7 54.5 7.5 7 2 41.66 2.18i 6 5.88 —0.24 7 H. C. . . . 16464 33.6 46.5 59.5 12.4 25.3 7 4 59.46 2.11 8 Mare . . . N.P. 37.8 50.8 3.5 16.5 29.4 7 11 3.60 2.82| 6 4.14 +0.71J 9 B.C. . . . 16464 21.2 34.1 47.0 0.0 7 14 34.10 1.79 10 Mars . . . S.F. 12.9 25.8 38.7 51.5 4.5 7 20 38.68 1.79 6 4.58 0.00 11 H. C. . . . 16464 24.8 37.8 50.8 3.5 16.5 7 22 50.68 1.52 12 Mars . . . N.P. 27.6 40.6 53.5 6.4 19.5 7 28 53.52 2.46J 6 2.84 0.94J 13 H.C. . . . 16464 51.0 3.7 17.0 29.8 42.8 7 31 16.86 1.31$ 14 Mars . . . S.F. 54.2 7.3 20.3 33.0 46.0 7 37 20.16 1.52 6 3.30 0.20; 15 H.C. . . . 16464 10.0 22.8 35.8 48.5 1.5 7 39 35.72 1.20 16 Mars . . . N.P. 11.5 24.5 37.5 50.3 3.2 7 45 37.40 2.32 6 1.68 1.12 17 H.C. . . . 16464 16.1 29.2 42.0 54.8 7.7 7 47 41.96 1.07 18 Mars . . . S.F. 18.2 31.3 44.0 56.9 9.9 7 53 44.06 1.50J 6 2.10 0.43J 19 H.C. . . . 16464 40.0 53.0 6.1 19.0 31.8 7 56 5.98 1.061 20 Mars . . . N.P. 40.6 53.7 6.5 19.4 32.3 8 2 6.50 2.40 6 0.52 1.39) 21 H.C. . . . 16464 45.5 58.5 11.4 24.3 37.1 8 4 11.36 1.11 22 Mars . . . S.F. 46.4 59.3 11.4 25.0 38.0 8 10 12.02 1.73J 6 0.66 0.62J 23 H.C. . . . 16464 12.2 25.0 38.0 50.8 3.6 8 12 37.92 1.09 24 Mars . . . N.P. 11.5 24.5 37.4 50.2 3.1 8 18 37.34 2.53 5 59.42 1.44 35 H. C. . . . 16464 1.2 14.2 27.0 40.0 52.9 8 21 27.06 1.19J 26 Mars . . . S.F. 1.0 13.8 26.5 39.5 52.7 8 27 26.70 2.00 5 59.64 0.80J 27 H.C. . . . 16464 55.9 8.8 21.8 34.6 47.5 8 29 21.72 1.38J 28 Mars . . . N.P. 54.0 6.5 19.5 32.4 45.5 8 35 19.58 3.07 5 57.86 1.68J 39 H.C. . . . 16464 41.0 53.7 6.4 19.5 8 37 53.67 1.63 30 Mars . . . S.F. 26.5 39.3 52.2 17.5 8 43 52.10 2.6SJ 5 58.43 0.99J 31 H.C. . . . 16464 31.0 44.0 57.0 9.6 22.5 8 45 56.82 1.89 32 Mars . . . N.P. 27.7 40.7 53.7 6.5 19.5 8 51 53.62 3.78 5 56.80 1.89 27.983 62.0 53.6 33 H.C. . . . 16464 34.5 47.4 0.4 13.2 26.0 8 54 0.30 2.24J Ther. att. 34 Mars . . , S.F. 31.9 44.7 57.8 10.5 23.5 8 59 57.68 3.40 5 57.38 1.15} 69.°5 Bar. red. to 32° F. 35 H.C. . . . 16464 13.3 26.2 39.0 51.8 4.6 9 1 38.98 2.60 27.872 36 Mars . . . N.P. 8.8 21.6 34.5 47.5 0.5 9 7 34.58 +4.68 +5 55.60 +2.08 AT SANTIAGO DE CHILE. 145 .JANUARY 88, 1858— Continued. Remarks. Not so good a night as last night; but all the observations were made under a magnifying power of 23.r>. anj with great satisfaction. Quite a sharp earthquake early in the afternoon. Results. h. m. s. m. 8. Rev. r ;; Mean S. F. . . Nine transits . . . 75321.90 + 6 2.139 . . . +0.393 . . . . =0 7.66 Mean N. P. , . Nine transits . ..81 41.75 + 6 0.476 . . . +1.303 . . . . =0 25.39 h. in. m. 8. h. m. s. Correction for chronometer at 7 33 . . . —3 16.90 Correction for chronometer at 8 2 . . . —3 16.91 . . . 8 20 54 ii /; A P. P. limbs in A. R. reduced to arc . . . 24.94 A N. 8. limbs niicr. in rev. . . . . .0.910 = 17.73 Variation of A. R. in 8m. 21s. . . . ... — 8.63 Variation of declination in 8m. 21«. . . — 1.87 . . . 16.31 Corr. for diam. of roicr. wires . . 2.20 Observed N. 8. diameter . . . . . 13.66 h. in. it h. m. // A a at 7 47 . 0.00 A p at 7 55 JANUARY aO, 18S2. • No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet — Star. Bar. Thermometers. A. B. C. D. E. A a. A* Air. Wet. 8. s. s. s. 8. h. m. s. Rev. 8. Kev. Inches. • O 1 2 3 4 5 6 7 8 9 10 a 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 96 31.5 7 13 31.48 7 14 7.58 7 16 11.98 7 16 47.18 7 18 18.48 7 18 54.78 7 21 18.48 7 21 52.98 7 23 15.58 7 2350.98 7 26 9.48 736 43.98 7 38 43.28 7 29 19.18 7 31 15.38 7 31 50.38 7 33 43.48 7 34 16.98 7 36 45.58 7 37 18.98 7 40 40.98 7 41 14.98 7 45 34.38 7 46 6.98 7 47 57.68 7 48 30.48 — 4.07 +3.68 —4.31 +4.42 -4.38J +3.58 —4.42 +4.39 —4.57 +3.50i — 4.60J +4.181 —4.72 +3.33J -4.75J +3.31i --I.86 +4.07 —4.96 +4.04J —4.97 +3.30 :..d»; +4.061 —5.03 +3.23 +36.10 35.20 36.30 34.50 35.40 34.50 35.90 34.90 33.50 33.40 34.00 32.60 4JMO +7.75 8.73 7.961 8.81 8.071 8.79 8.05} 8.07 8.93 9.00| 8.27 9.07 +8.26 28.050 Ther. att 68°. 7 Bar. red. to 32° F. 370." 64.0 53.7 Mara . . . S.F. • ' 7.6 12 0 • • • • Mars . . . N.P. • • 47.2 IB. 5 • • • • 54.8 18.5 Mars . . . N.P. • • • • 53.0 15.6 • • Mars ... S.F. Washington . . Mars . . . N.P. • • • • 51.0 9.5 44.0 43 3 • • Mars . . . S.F. 19.2 15.4 Mars . . . S.F. • • 50.3 43.5 • • Mar* . . . N.P. • • • • 17.0 45 6 Mars . . . N.P. • • 19.0 41.0 • • Mara . . . S.F. • • 15.0 34 4 • • 7.0 57.7 Mara . . . S.F. • • 30.5 • ' 19 146 OPPOSITION OF MARS, 1851-52, JANUART 39, 185ft— Continued. No. for reference. Object. Chronometer time of transit. Wean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. c. D. E. A a. A ,5. Air. Wet B. 8. s. 8. .. h. ra. s. Eev. s. Rev. Inches. • • 27 38 29 30 31 33 33 34 35 36 37 38 39 40 41 43 43 44 45 46 47 48 49 50 51 52* 53 54 55 56 57 58 59 60 61 63 63 64 65 66 67 68 69 70 71 72 2.2 7 50 2.18 7 50 33.58 7 52 31.58 7 53 5.18 7 56 40.28 7 57 13.98 8 0 55.48 8 1 28.18 8 2 52.68 8 3 24.68 8 5 9.58 8 5 42.48 8 7 46.28 8 8 16.98 8 10 46.48 8 11 18.28 8 13 28.18 8 13 58.98 8 15 29.58 8 16 1.58 8 17 3.58 8 17 33.98 8 19 18.98 8 19 50.48 8 31 33.18 8 32 3.48 8 24 19.48 8 34 50.58 8 36 8.98 8 26 38.48 8 39 50.38 8 30 20.98 8 31 32.18 832 1.48 8 36 54.98 8 37 24.68 8 39 44.28 8 40 12.88 8 41 32.48 8 42 2.18 8 43 57.58 8 44 05.98 8 46 9.08 8 46 37.98 8 47 50.48 8 48 18.58 —5.07 +4.12 —5.05 +3.32 —5.17 +4.04 —5.17 +3.34 -r-5.09} +4.18 —5.05} +3.40i —5.05 +4.28 —5.43} +3.13 —5.40} +3.98 —5.40 +3.35 —5.35} +4.07* — 5.32} +3.29J —5.39} +3.39 —5.24 +3.47 —5.23 +4.37 —5.12} +3.69} —5.07} +4.51} —4.90 +3.97} -^1.83 +4.84 -4.77} +4.15 -4.69} +5.05 —4.64 +4.33 -4.61 +5.22 +31.40 33.60 33.70 32.70 32.00 32.90 30.70 31.80 30.80 32.00 30.40 31.50 30.30 31.10 29.50 30.60 39.30 29.70 28.60 29.70 28.40 28.90 +28.10 +9.19 8.37 9.21 8.5) 9.37} 8.46 9.33 8.56} 9.38} 8.65 9.43 8.62 8.68} 8.71 9.60 8.82 9.59 8.87} 9.07 8.92} 9.74} 8.97 +9,83 28.050 Ther. att. 68°. 7 Bar. red. to 32° P. 27.940 64.0 53.7 Mars N P. 33.6 31.6 5.2 40.3 Mars . . . N.P. • ' 14.0 55.5 • • 28.3 58.7 24.7 9.6 42.5 46.3 Mars . . N.P. 17.0 4B.5 Mara . . . S.F. • • • • 18.3 28.2 • • Mars . . . N.P. • • • • 59.0 39.6 • • • • Mars . . . S F. 1.6 3.6 Mara . . . N.P. • ' 34.0 19.0 Mars . . . S.F. Washington . . . Mars . . . N.F. • ' 50.5 33.2 3 5 . . . . 19.5 Mais . . . S.F. 50 6 9 0 Mare . . . N.P. • • • • 38.5 50.4 Mars . . . S.F. • • 21.0 32 2 • • Mars . . . N.P. 1.5 Washington . . . 55.0 Mars . . . S.F. 24.7 44.3 Mars . . . N.P. 12 9 32 5 Mars . . . S.F. • • • 2.2 57.6 Mars . . . N.P. 26.0 9 1 Mars . , . S.F. • ' 38.0 50 5 • • Mars . . . N.P. 18.6 • • AT SANTIAGO DE CHILE. 147 JANUARY 29, 1858— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometer*. A. B. c. D. E. A a. A A Air. Wet. 8. 8. g. 8. 8. h. in. s. Rev. 8. Rev. Inches. • • 73 74 75 76 77 78 79 80 32.2 8 49 32.18 8 50 1.28 8 51 23.18 8 51 51.48 8 53 5.18 8 53 33.98 8 54 50.48 8 55 18.38 -4.551 +4.51 —4.42 +5.38 —4.40 +4.67 —4.31 +5.59 +29.10 28.30 28.80 +27.90 +9.06J 9.80 9.07 +9.90 28.037 Ther. alt. 67°. 7 Bar. red. to 32' F. 27.930 60.1 52. B Mars . . . S.F. 1.3 23.2 Mars . N.P. 51 5 5.2 Mars . . . S.F. • ' 34.0 50.5 • • Mars . . . N.P. 18.4 Remarks. Night as fine as the preceding. The star is near 20s. in error to the eastward, and, being not more than a 11J or 10th magnitude, it is so nearly occulted tinder the wire, that its transits are little better than guesses. After 20 measures, put in power 150, and was able to see it better, with the same light. The interval of transits is, however, so short, that the measures are not very satisfactory. a Recorded 24m, b Rejected. Results. h. m. B. m. s. Rer. I n Mean S. F. . Twenty transits . . 8 6 0.30 + 32.390 .... +8.503 .... = 2 45.72 Mean N. P. . Nineteen transits . 8 8 2.97 + 31.120 .... +9.331 .... = 3 1.86 h. m. m. s. h. m. H. Correction for chronometer at 8 6 , * . — 3 19.65 8 2 40.65 Correction for chronometer at 8 8 . . 3 19.65 8 4 43.3-3 3 2.67 ;/ it A P. F. limbs in A. U. reduced to arc . . 19.05 A N. S. limbs micr. in rev 0. 928 = 16.14 Variation of A. H. in 2m. 3» . — 2.09 Variation of declination in 2m. 3>. . . — 0.44 Observed P. F. diameter 16.96 Corr. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter 13.50 h. m. // h. m. it AD at 8 2 . 0.16 A p at 8 4 0.17 JANUARY 3O, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometere. A. B. C. D. E. A a. A ,5. Air. Wet. s. 8. B. 8. 8. h. m. *. Rev. 9. Rev. Inches. * • 1 2 3 4 5 6 7 8 18.2 7 14 18.18 7 14 41.48 7 17 59.68 7 18 23.68 7 21 9.98 7 21 33.48 723 37.98 7 23 55.48 +3.12 —3.62 +3.63 —3.77J +2.79 — 3.871 +3.53J -3.86i —23.30 24.00 23.50 — 25.50 +6.74 •;. in. c." ; +7.40 M.OM Tlier. alt. 68". 0 H;ir. red. •27.1^7 57.8 53.9 41.5 Mars . . . N.P. .V.I. 7 23.7 • • Mars . . . S.F. 10.0 33.5 • ' • • Mars . . . N.P. • • • • 38.0 53.5 • • • • S 148 OPPOSITION OF MARS, 1851-52, JANUARY 30, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. At. Air. Wet. 8. s. 8. E. 8. h. m. s. Rev. s. Rev. Inches. • • 9 10 11 12 13 14 IS 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 53 53 54 Mars . . . S.F. • • 57.6 21.5 • • 7 24 57.58 7 25 21.48 7 27 33.98 7 27 58.98 7 31 26.98 7 31 51.48 7 33 50.51 7 34 15.98 7 35 51 .91 7 36 18.28 7 38 5.81 7 38 31 .98 7 40 45.41 7 41 10.48 7 42 29.31 7 42 55.98 7 44 36.51 7 45 2.98 7 47 30.91 7 47 57.98 7 49 17.11 7 49 43.48 7 50 56.91 7 51 24.18 7 52 54.91 7 53 20.98 7 55 12.91 7 55 40.18 7 59 6.41 7 59 32.98 8 1 7.51 8 1 35.58 8 4 1.61 8 4 28.38 8 5 52.71 8 6 20.98 8 11 36.51 8 12 4.18 8 13 29.48 8 13 57.98 8 17 9.48 • 8 17 37.48 8 18 56.38 8 19 25.18 8 20 59.38 8 21 Sb.38 +2.74 —4.15 +3.51 —4.051 +2.59 —4.11 +3.321 —4.28 +2.331 —4.38 +3.35 —4.32 +2.51 —4.38 +3.32 —4.45 +2.521 —4.461 +3.30} —4.51 +2.461 —4.52 +3.33J —4.501 +2.51 —4.52 +3.40 —4.56 +2.04 -5.11 +2.91 —5.08 +2.12 —5.141 +2.99 —5.121 +3.011 —4.34 +3.82 —4.23 +3.121 — 4.20J +4.00 —4.171 +3.241 —4.18 —23.90 25.00 24.50 25.47 . 26.37 26.17 25.07 26.67 26.47 27.07 26.37 27.27 26.07 27.27 26.57 28.07 28.77 28.27 27.67 28.50 28.00 28.80 —29.00 +6.89 7.561 6.70 7.601 6.711 7.67 6.89 7.77 6.99 7.811 6.981 7.84 7.03 7.96 7.15 7.99 7.261 8.111 7.351 8.05 7.33 8.171 +7.421 28.034 Ther. att 68° .0 Bar. red. tn 32° F. 27.937 57.8 53.9 Mars . . . N.P. • • 34.0 59.0 • • Mars . . . S.F. 27.0 51 5 • • • • Mars . . N.P. 37.6 16.0 Mars . . . S.F. 39.0 18 3 • • Mars . . . N.P. 52.9 32.0 • • Mars . . . S.F. 32.5 10.5 Mars . . . N.P. 16.4 56.0 Mars S F 23 6 3.0 Mars . . , N.P 18.0 58.0 Mars . . . S.F. 4.2 43.5 Mars . . . N.P. 44.0 24.2 • • Mars . . . S.F. • • 42.0 21.0 Mars . . . N P 0 0 40.2 Mars . . . S.F. 53.5 33.0 Mars . . . N.P. 54.6 35 6 Mars . . . S.F. 48.7 28.4 Mars . . . N.P. 39.8 Washington . . . 21.0 Mars . . . S.F. • • 23.6 4.2 • • Mars . . . N.P. 29.5 58.0 Mars . . . S.F. • • 9.5 37.5 • • Mars . . . N.P. • ' 56.4 25.2 • • Mars . . . S.F. • • 59.4 28 4 AT SANTIAGO DE CHILE. 149 JANUARY 30, I ^ . : < ,,,.(liiti, ,1. No. for reference. Object. Chronometer time of transit. rttanof wires. Micr. Planet— Star. Bar. '111 !MI"l!l'-!i [-. A. B. C. D. E. A a. A A Air. Wet. s. s. 8. B. h. m. s. Eav. B. Rev. In. •],,•>. • • 55 56 57 58 59 tin 61 62 63 64 65 H 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 H 90 97 98 99 100 Mar* N.P 39.0 8 22 38.98 823 8.18 R 24 39.38 8 25 7.48 8 26 26.58 8 26 56.28 8 29 12.88 8 29 41.38 8 31 23.58 8 31 53.48 8 33 56.18 8 34 25.18 8 35 34.88 8 36 4.58 8 37 10.98 8 37 40.48 8 38 44.58 8 39 14.98 8 40 33.38 8 41 2.48 8 43 3.48 8 43 34.18 8 45 40.98 8 46 10.58 8 47 42.38 8 48 13.28 851 1.48 8 51 31.48 85941.48 8 53 13.28 8 54 23.48 8 54 54.13 8 56 24.58 8 56 56.48 8 59 1.68 8 59 32.98 9 0 53.58 9 1 25.98 9 3 0.18 9 3 31.78 9 4 45.98 9 5 18.48 9 7 9.68 '.i ; 41.18 98- 9 9 32.38 +3.99 —4.17 +3.26 —4.141 +4.17 —4.11 +3.43 —4.07 +4.26 —3.96 +3.611 — 3.91J +4.48 — 3.80^ +3.73 —3.81 +4.58 —3.721 +3.881 —3.63 +4.80 —3.70 +4.06 —3.46 +5.03 —3.41 +4.38 —3.38 +5.271 —3.251 +4.541 —3.22 +5.49 -2.98 +4.81 —2.89 +5.74 —3.78 +4.981 —2.85 +5.91 -2.64 +6.70J —1.98 -29.20 28.10 29.70 38.50 29.90 29.00 30.30 29.50 30.40 29.10 30.70 29.60 30.90 30.00 31.80 X.70 31.90 31.30 32.40 31.60 32.50 31.50 -33.10 +8.16 7.401 8.28 7.50 8.22 7.53 8.281 7.54 8.301 7.511 8.50 7.52 8.44 7.76 8.53 7.761 8.47 7.70 8.53 7.831 8.50 7.89 +8.621 28.031 Ther. ntt. 66°. 8 Bar. red. to 32° F 27.927 56.0 53.3 Washington . . . Mars . . . S.F. • • • • 8.2 39.4 • • 7 5 26 6 56.3 Mars . . S F 12 9 41.4 Mars . . . N.P 23.6 Mars . . . S.F. • • • • 56.2 25 2 • • • • Mars . . . N.P. l 34.3 4 6 • • Mars , . . S.F. • •• • • 11.0 40.5 • • Mar* . . . N.P. • • 44.6 15 0 • • M; 150 OPPOSITION OF MAKS, 1851-52, JANUARY 3O, 1853— Continued. Remarks. Fine night. Any magnifying power may be used. Comparing star not brighter than 12i, or perhaps It magnitude, and so dim under light that a large number of the measures are doubtful. Many were made with no other light than that thrown into the field by the planet. Results. h. m. s. s. Rev. / i, Mean S.F. . . Twenty-five transits . 8 13 21.70 — 27.698 . . . . + 7.284 . . . =221.96 Mean N.P. . . Twenty-five transits . 8 15 26.53 — 28.834 .... +8.088 . . . =2 37.63 h. in. m. s. h. m. s. P p t'o i for chronometer at 8 13 , —3 22.01 . . 8 9 59.69 0 ometer at 8 15 . —3 22.01 . 8 12 4.52 orrection or c ir 2 4.83 A P. F. limbs in A. R. reduced to arc . . 17.04 A N. S. limbs micr. in rev. . . . 0.804 = 15.67 Variation of A. R. in 2m. 5» . . + 2.11 Variation of declination in 2m. 5s. . — 0.43 Observed P. F. diameter . . 14.93 Con. for diam. of micr. wires . . — 2.20 Observed N. S. diameter . . 13.04 h. m. H h. m. // A o at 8 10 . . 0.13 A /, HIS 12 . 0.15 JANUARY 31, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. £. A a. AJ. Air. Wet. s. g. s. s. s. h. m. s. Rev. in. s. Rev. Inches. • • 1 Mara . . . S.F. 56.2 9.2 22.3 35.0 48.0 7 10 23.14 —6.92 28.026 64.4 55.6 2 Washington . . . 0.0 12.0 25.0 37.8 51.0 7 12 25.16 +2.39 —2 3.02 —9.31 3 4 5 Mars . . . N.P. Washington . . . Mars . . . S.F. 54.5 58.5 35.2 7.5 11.5 48.2 20.4 24.5 1.1 33.2 37.4 14.0 46.1 50.5 27.0 7 17 20.34 7 19 24.48 722 1.10 —6.40 +2.15 —7.31 2 4.14 8.55 Ther. an. 70°. 6 Bar. red. to 3-2° F. 27.912 6 Washington . . . 38.5 51.5 4.5 • • 30.5 7 24 4.47 +2.04 2 3.37 9.35 7 Mars . . . N.P. 31.0 44.0 56.8 9.7 22.8 7 26 56.86 — 3.80J 8 Washington . . . 36.0 48.7 14.6 27.6 7 29 1.72 +4.65J 2 4.86 8.46 9 Mars . . . S.F. 10. d 23.0 35.8 48.8 1.8 7 31 25.88 —4.69 10 Washington . . . 14.5 27.3 40.2 53.0 6.0 7 33 40.20 +4.59 2 4.32 9.28 11 Mars . . . N.P. 6.0 18.8 31.9 44.6 57.7 7 35 31.80 —3.91 12 Washington . . 11.5 24.3 37.3 50.3 3.5 7 37 37.38 +4.54J 2 5.58 8.45J 13 Mars . . . S.F. 14.1 27.0 40.0 52.8 6.0 7 39 39.98 —4.71 14 Washington . . . 18.5 31.5 44.4 57.5 10.5 7 41 44.46 +4.47 3 4.48 9.18 15 Mars . . . N.P. 13.5 26.5 ' 39.5 52.3 5.4 7 44 39.44 — 3.881 16 Washington . . . 19.7 31.6 45.7 58.5 11.5 7 46 45.40 +4.41 2 5.96 8.291 17 Mars . . . S.F. 38.8 51.8 4.7 17.6 30.6 7 49 4.70 —4.70 18 Washington . . . 44.2 57.3 10.3 23.3 36.3 7 51 10.28 +4.36 2 5.58 9.06 19 Mars . . . N.P. 41.0 54.0 6.8 19.7 33.0 7 53 6.90 —3.871 30 Washington . . . 47.4 0.6 13.7 26.7 39.6 7 55 13.60 +4.38 2 6.70 8.25J 21 Mars . . . S.F. 34.4 47.4 0.5 13.3 26.4 7 58 0.40 —4.591 22 Washington . . . 40.5 53.3 6.4 19.3 32.3 8 0 6.36 +4.41 2 5.96 9.001 23 Mars . . . N.P. 30.3 42.3 56.0 9.0 22.1 8 1 56.12 —3.72 24 Washington . . . 37.8 51.0 3.7 16.6 29.7 8 4 3.76 +4.49 2 7.64 8.21 25 Mars . . . S.F. 37.7 50.6 3.5 16.4 29.5 8 6 3.54 --4.43 26 Washington . . 4-1.0 57.0 9.9 23.0 33.8 8 8 9.9-1 +4.52 2 6.40 8.95 27 Mars . . . N.P. 41.5 54.5 7.3 20.0 33.2 8 10 7.30 —3.63 28 Washington . 48.0 1.2 14.2 27.0 40.2 8 13 14.12 +4.471 —2 6.82 —8.101 AT SANTIAGO DE CHILE. 151 JANUARY 31, 1851— Continued: No. for reference. Object. Chronometer time of transit. Mean of \vin-s. Micr. Planet— Star. Bar. Thermometers. A. a. C. D. E. A a. A I. Air. Wcl. 8. 8. a. a. a. h. in. g. Rev. III. 8. Rev. fnchei. • 0 89 30 Mars . . . S.F. Washington . . . 32.0 39.0 45.0 52.1 57.9 5.0 10.8 17.8 23.8 31.0 8 16 57.90 8 19 4.98 -4.421 +4.41 —2 7.08 —8.831 •J7.UKI 63.0 53.6 31 32 33 Mara . . . N.P. Washington . . Mars . . . S.F. 38.6 47.5 1.7 51.7 0.5 14.7 4.6 13.3 27.5 17.7 26.3 40.4 30.7 39.3 53.5 8 21 4.66 8 23 13.38 8 26 27.58 —3.48 +4.47 —4.13 2 8.72 7.95 Thor. att. 68° .5 Bar. red. to 32» F. 27.872 34 Waslii]i. . . . — 0.02 Observed P. F. diameter .... . . 10.84 Corr. for diam. of micr. wires . . . . 2.20 Observed N. S. diameter . . . 13.27 h. m. /' h. m. ii A o at 7 14 . 0.23 A p at 7 15 0.22 FEBRUARY 3, 1852. V «J Chronometer time of transit. Planet— Star. Thermometers. Mpnn of wires Micr Bar. £ £ Object. A. B. C. D. E. A a. Ar. alt. 3 Mars . . . N.P. 43.5 56.4 9.4 22.3 35.3 7 19 9.38 3.10 73'. 7 liar. ml. 4 llr-M 1 . . . 341 15.5 28.4 41.5 54.3 7.2 7 20 41.38 —0.77 —1 32.00 —8.33 17.878 20 154 OPPOSITION OF MAES, 1851-52, FEBRUARY 3, 1853— Continued. at o Chronometer time of transit. Micr. Planet— Star. Bar 'herinometcrs. <£ £ Object. A. B. C. D. E. A a. A° F. 27.870 56 Bcssel ... 344 2.5 15.5 28.3 41.0 54.0 9 0 28.26 0.35 1 38.80 3.20 57 Mars . . . S.F. 15.5 28.6 41.6 54.5 7.5 9 2 41.54 3.08 58 IlrsM'l . . . 344 53.5 6.5 19.5 32.5 45.5 9 4 19.50 0.58 1 37.96 2.50 H Mars . . . N.P. 49.5 2.5 15.5 28.5 41.5 9 6 15.50 4.08 60 Besscl ... 344 28.6 41.6 54.7 7.6 20.5 9 7 54.60 —0.781 —1 39.10 —3.291 Remarks. A fine night again. Objects a little wavy at times, but measures, with power 235, very satisfactory, a Recorded 36.9s. at wire C. Results. h. m. ». m. s. Rev. / H Mean S. F. . . Fifteen transits . . 8 8 13 ,83 — 1 34.225 . . . . —1.965 . . . . = 0 38.30 Mean N.P. . . Fifteen transits . . . 8 11 56 .13 — 1 35.569 . . . . —2.805 . . . . = 0 54.67 h. in. m. s. h. m. 8. Correction for chronometer iit 8 8 • . —3 30, 18 Santiago aid. time 8 F. . . Correction for chronometer at 8 12 . —3 30. 19 Santiago sid. time N P 8 8 25 94 3 42 29 , ii A P. F. limbs in A. R. reduced to arc . . . 30, 16 A N. S. limbs micr. L 0.840 — 16.37 Variation of A. R. in 3m. 42t . . — 3 .57 Variation of declination in 3m. 42s. . . — 0.65 Observed P. F. diameter . . 16 .59 Corr. for dtam. of micr. wires . . . — 2.20 13.52 h. m. j / h. m. // A pat 8 5 . 0 .04 A p at 8 9 . . . . 0.05 FEBRUARY 3, 1859. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ad. Air. Wet. s. 8. a. 8. 8. h. m. 8. Rev. m. 8. Rev. Inches. • • 1 2 3 4 5 6 7 8 9 10 10.0 8 11 10.00 —2.05t 3.39 +1.331 a. 15 1.34 9.16] +1.451 27.908 Ther.att. 71°. 5 liar. tr-d. 27.790 64.8 58.6 Mars . . . N.P. • • 30.5 8 12 30.50 1.28 3.43 Mara S.F. 38.6 8 14 38.60 2.01 3.35 Marl N P 4.7 8 21 4.711 1.041 3.43 51.6 8 29 51.60 1.72 —3.171 156 OPPOSITION OF MARS, 1851-52, FEBRUARY 3, 1S53— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers, A. B. C. D. E. A a. A t. Air. Wet. s. s. s. s. s. h. m. s. Itev. m. s. Rev. Inches. « • 11 12 13 14 15 16 17 18 19 20 21 23 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 Mars . N.P. 10.2 8 24 10.30 —2.62 4.93 -J-2.31 1.46} 2.25 1.45} 2.26} 1.56 2.33 1.54 2.3GJ 1.571 2. 30 1.67} 2.4.-,; 1.58} 2.43} 1.64 2.43 1.70} 2.44 1.72 2.53 1.72; +2.57 27.908 Thcr. att 71". 5 Rar. red to 32" F. 27.790 61.8 59.6 Mars . . . S.F. • • • • 56.5 • • • • 8 25 56.50 3.4-3 4.88} Mars . . N.P. 32.0 8 27 32.00 2.62 4.87 3.34 4 79t Mars . . . S.F. 2.0 8 29 2.00 Mars . . . N.P. 35.6 • • 8 30 35.60 2.45} 4.72 3.14 . . . Mars . . . S.F. 18 0 8 33 18.00 Mars . , . N.P. 53.1 8 34 53.10 2.28 Mars . . . S F. • • 21.0 • • • • 8 36 21.00 3.02} Mars . . . N.P. 55.7 8 37 55.70 2.16 Mars . . . S.F. 20.5 • • 8 40 20.50 2.89 4.46} 2.00 4.36 2.69 • Mars . . . N.P. Washington . . . • • 51.6 • • 8 41 51.60 Mars . . . S.F. Washington . . . 11.3 • • • • 8 43 11.30 Mars . . . N.P. • • 38.6 . . 8 44 38.60 1.85J Mars . . . S.F. 8 46 0.50 2.58} 4.17 1.71 Mars . . . N.P. 8 47 24.00 Washington . . . Mars . . . S.F. 21.0 8 49 21.00 2.40} Mars . . . N.P. 8 50 44.00 1.51 Mars . . . S.F. 8 51 57.70 2.21 Mars . . . N.P. 11 5 8 53 11.50 1.40J Washington . . . Mars . . . S.F. • • • • 40.3 • • 8 54 40.30 2.06 Mars . . . N.P. 48.2 8 56 48.20 1.25 Mars . . . S.F. • • 32.0 . . 8 57 32.00 1.9.3} 3.66 1.05} Mars . . . N.P. 58.8 • . 8 59 58.80 AT SANTIAGO DE CHILE. 157 FEBRUARY 3, 1853-Contlunecl. CJ Chronometer time of transit. Planet— Star. 'hiTinometerc. c \fpi of ' p Bar £ £ Jr Object. A. B. C. D. E. A a. AJL Air. Wet. S 6 8. 8. B. a. 8. )l. HI. 8. Rev. 111. B. Rev. Inches. 0 • fc 57 Mars . . . S.F. . . 40.2 . 9 1 40.30 —1.70 u>7. -.-<•, 64.8 61.0 58 W 1 • Ion 3.57 +1.87 70°. 2 59 Mars . . . N.P. 33.3 9 3 33.30 0.94} Bar. red. 60 3.56J +2.62 to 32° F. 27.773 Remarks. Cirro stratus all over the heavens. Both planet and star indistinct and unsteady, though able to use power 235. The small difference A. R. prevented the time of the star's transit being observed without risking the declination measure on the border of the field. Results. Mean S. F. . . Fifteen transits . Mean \. P. . . Fifteen transits . h. ni. Correction for chronometer at 8 39 . Correction for chronometer at 8 40 . A N. S. limbs micr. in rev. . . Variation of declination in 1m. 55s. Cnrr. fur diani. of micr. wires . . Oh-serveil N. S. dinineter . . . h. m. s. . 8 38 32.48 . 8 40 27.45 m. 9. . —3 34.22 . —3 34.22 . 0.804 = 15.70 — 0.31 — 2.20 13.19 =030.72 =0 46.39 Rer. ....... +1.576 .. ....... +2.380 .. h. m. B. Santiago sill, time S. F ........ 8 34 58.26 Santiago sid. time N. P ........ 83653.23 Interval ............ 1 54. »7 h. m. A pat 8 35 ............ 0.03 A pat 8 37 ............ 0.°5 FEBRUARY 4, 1853. The sky was too much obscured by thin cirri to permit the comparing star (H. C. 16337) to be seen even without any li«ht; nor could I find a star in A. It. «/.. 12m. Ids., Dec. + 24° 32' ±, which is on the map. FEBRUARY 5, 1803. Entirely obscured. FEBRUARY 6, Entirely obscured FEBRUARY 7, 1853. V B Chronometer time of tramlt. Micr. Planet— Star. Bar. Tlicrmnmeten. £ ! Object. A. B. C. D. E. A a. A 4. Air. Wet. £ & s. fl. B. s. B. h. m. B. Rev. m. «. RCT. Inrlim. • • 1 3 11,'SSCI ... 3-11 Mars . . . S.F. 36.8 50.0 54.5 3.2 7.2 16.0 20.3 29.5 33.5 6 42 3.10 6 43 7,38 +:,.n:i —.',.85 +1 4.28 —10.68 37.879 Ther. ntt. 71.4 H.I 3 4 BMHl ... 341 Murs . . . N.P. 54.5 57.0 7.5 10.2 20.6 33.1 B.I 36.0 49.1 6 46 20.53 6 47 S3. 08 +4.85 —4.97 1 2.5;', 9.83 -,:,.:, liar p-il. to 32° F. I) . ! I'.' 5 6 ll.-sr'l ... Ml Mars . . . 8.P. 31.0 37.5 47.2 50.5 0.0 3.5 13.0 16.3 29.5 6 M 0.03 6 53 3.46 +4.71 —5.94 +1 3.43 —10.65 158 OPPOSITION OF MARS, 1851-52, FEBRUARY 7, 1853— Continued. to Chronometer time of transit. Planet— Star. Miermoineters. V \f f Micr. Bar. jj £ Object. A. B. c. D. E. A a. At. Air. Wet. _ o s. s. s. s. s. 1). HI. S. Ruv. m. s. Eev. Inches. • • 7 Bessel ... 341 41.6 54.6 7.6 20.5 6 59 7.55 +4.43J 27.872 71.4 64.2 8 Mars . . . N.P. 43.5 56.5 9.5 22.5 35.5 7 0 9.50 —5.42 +1 1.95 —9.85} Ther. att. 9 Bessel ... 341 14.6 27.6 40.7 . . 7 2 40.59 +4.28 75°. 9 10 Mars . . . S.F. 17.5 30.5 43.3 56.2 9.5 7 3 43.40 —6.34 1 2.81 10.62 Bar. red. to 33° F. 27.742 11 Bessel ... 341 55.0 8.2 21.2 7 6 21.09 +4.111 12 Mars . . . N.P. 56.7 9.6 22.8 35.6 48.5 7 7 22.64 —5.70 1 1.55 9.811 13 Bessel ... 341 17.2 30.2 43.3 . 7 9 43.19 +4.03J 14 Mars . . . S.F. 19.0 32.3 45.5 11.5 7 10 45.31 —6.57 1 2.12 10.601 15 Bessel ... 341 51.2 4.5 17.5 7 13 17.36 - +3.97 16 Mars . , . NP. 52.4 5.5 18.5 31.3 44.4 7 14 IB. 42 —5.81 1 1.06 9.78 17 o Bessel ... 341 8.2 21.2 34.4 7 17 34.22 +3.90 18 Mars . . . S.F. 10.2 23.3 36.3 49.2 2.5 7 18 36.30 —6.59 1 2.08 10.49 19 Bessel ... 341 56.0 9.0 7 21 8.96 +3.80 20 Mars . . . N.P. 43.7 56.8 9.8 22.8 35.8 7 22 9.78 —5.96 1 0.82 9.76 21 Bfsscl ... 341 3.5 17.0 30.0 , . 7 25 29.79 +3.72 22 Mars . . . S.F. 5.3 18.5 31.5 • • 57.8 7 26 31.50 -6.72 1 1.71 10.44 23 a Bessel ... 341 46.8 0.0 . 7 28 59.87 +3.60 24 Mara . . . N.P. 33.6 46.8 0.0 12.5 26.0 7 29 59.78 —5.93 0 59.91 9.53 25 Bessel ... 341 32.5 45.5 58.5 . . 7 39 58.46 +3.48 • 26 Mars . . . S.F. 33.5 46.3 59.0 12.2 25.0 7 40 59.20 -6.83J 1 0.74 10.311 97 Bessel . . .341 44.5 57.6 10.6 7 43 10.52 +3.46 38 Mars . . . N.P. 44.0 57.0 10.0 23.0 36.0 7 44 10.00 —6.08 0 59.48 9.54 29 Bessel ... 341 8.5 22.0 35.0 7 46 34.79 +3.42 30 Mars . . . S.F. 9.0 22.0 35.0 48.0 1.0 7 47 35.00 —6.821 1 0.21 10.241 31 Bessel ... 341 55.0 8.2 21.0 7 52 21.02 +3.481 32 Mara . . . N.P. 53.5 7.0 20.0 32.8 46.0 7 53 19.86 —5.98 0 58.84 9.461 33 Bessel ... 341 56.0 8.8 21.8 7 55 21.82 +3.551 34 Mars . . . S.F. 55.5 8.5 21.5 34.3 47.3 7 56 21.42 —6.68 0 59.60 10.231 35 Bessel ... 341 43.2 56.4 9.4 7 59 9.29 +3.551 36 Mars . . . N.P. 41.5 54.3 7.4 20.4 33.4 8 0 7.40 —5. 911 0 58.11 9.47 37 Bessel ... 341 32.5 45.3 58.3 8 2 58.32 +3.661 38 Mars . . . S.F. 31.3 44.5 57.5 23.5 8 3 57.43 —6.59 0 59.11 10.251 39 Bessel ... 341 8.2 21.0 34.0 8 6 34.02 +3.66 40 Mars . . . N.P. 5.5 18.5 31.5 44.6 58.0 8 731.62 —5.70 0 57.60 9.36 41 Bessel ... 341 52.3 5.3 18.0 8 10 18.16 +3.7-H 42 Mars . . . S.F. 51.0 3.8 16.5 29.6 42.6 8 11 16.70 —6.36 0 58 54 10.101 43 Bessel ... 341 41.5 54.3 7.3 8 14 7.32 +3.86 44 Mars . . . N.P. 38.3 51.5 4.3 17.6 30.5 8 15 4.44 —5.53 0 57.12 9.39 45 Bessel ... 341 31.5 45.0 58.0 , , 8 18 57.79 +3.93 46 Mara . . . S.F. 29.8 43.0 55.6 22.0 8 19 55.83 — 6.19J 0 58.04 10.12J 47 Bessel ... 341 1.5 14.3 27.3 8 22 27.32 +4.02 27.846 67.0 63.6 48 Mars . . . N.P. 58.0 11.0 24.0 36.8 50.0 8 23 23.96 —5.221 0 56.64 9.241 Tlicr. att. 49 Bessel . . . 341 35.0 48.2 1.3 . . 827 1.12 +4.21 74°. 8 50 Mars . . . S.F. 33.2 45.0 59.0 12.0 25.0 8 27 59.04 —5.79 0 57.92 10.00 liar. rrd. to 32° F. • 27.720 51 a Bessel ... 341 18.0 31.0 44.0 . . 8 30 43.96 +4.32 52 Mars . . . N.P. 14.5 27.0 40.5 6.2 8 31 40.28 —4.961 +0 56.32 —9.281 AT SANTIAGO DE CHILE. 159 FEBRUARY t, 1853— Continued. » Jtemarks. Night unfavorable. After the hottest day (temp. 90° .7) yet experienced in Chile, a cold wind has set in, and the images have never hern cither sharp or steady. No measure i* rejjaided as more than fair. With the first three, power 150 was used ; afterwards 235, though with some difficulty. The observations marked o were much blurred anil unsteady. Results. h. m. s. m. a. Rev. 1 H Mean S. F. . . Thirteen transits . . , 7 37 13.23 + 1 0.815 . '. . —10.367 . . . . =323.05 Mean N. P. . . Thirteen transits . . . 7 41 15.98 + 0 59.381 ... — 9.563 . . . . =3 6.38 h. ID. in. B. h. m. p. .... nnmeter nt 7 37 . . —3 47.17 7 33 26 06 . . — 3 47.18 7 37 28 80 orre 4 2.72 // ti A P. F. limbs in A. R. reduced to arc . . . 21.51 A N. S. limits mic. in rev . 0.804 = 15.67 ... — 3.48 Variation of declination in 4m. 3*. . — 0.51 Observed P. F. diameter .... . . . 18.03 Coir, for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 12.96 h. m. // h. m. * A o at 7 33 . . 0.20 A a at 7 37 . . , . 0.19 FEBRUARY 8, 1859. j Chronometer time of transit. Planet— Star. rhermometers. S £ Mean of wires. Micr. Bar. .s s ^ Object. A. B. c. D. E. A a. A I. Air. Wet. £ 6 s. 8. 8. s. s. b. m. s. Rev. s. Rev. Inches. O * 1 9.0 6 43 8.98 +3.72} 27.890 66.6 60.4 2 Bessel ... 341 ( t 28.6 . . , . 6 43 28.58 5.52 —19.60 —1.79} Ther. att. 3 Mars . . . N.P. t 10.0 6 47 9.98 4.33 72°. 3 4 Bessel ... 341 28.3 6 47 28.28 5.31 18.30 0.98 Bar. red. to 32° F. 27.770 5 Mars . . . S.F. t f 1.4 . . 6 50 1.38 3.45 6 Bessel . . . 341 . . . • 20.0 • • 6 50 19.98 5.19} 18.60 1.71; 7 Mars . . . N.P. 41.7 t t 6 51 41.68 4.37 ' 8 Bessel ... 341 . . 59.8 5 51 59.78 5.12 18.10 0.75 9 Mars . . S.F. 37.5 t t 6 53 37.48 3.40} Id Bessel ... 341 • • 55.7 • • 6 53 55.68 5.18} 18.90 1.78 15.9 6 55 15.88 4.17} 12 Bessel ... 341 . . 35.3 • • 6 55 35.28 5.08} 19.40 0.91 13 Mars . . . S.F. . 27.3 , , 6 58 27.28 3.45 14 Bessel ... 341 45.8 • • 6 58 45.78 5.11} 18.50 1.66} 15 Mars . . . N.P. 56.5 f , 6 59 56.48 4.13 16 Bessel ... 341 16.5 • • 7 0 16.48 5.06 20.00 0.93 17 Mars . . . S.F. 45.5 g 7 1 45.48 3.30 18 Bessel . . 341 . . 4.4 • • 7 2 4.38 5.05} 18.90 1.75} 19 20 26.1 7 3 26.08 7 3 46.08 4.91 5.09} 20.00 0.88} Bessel ... 341 . . 46.1 ' • 21 92 Mars . . . S.F. He-M'l ... 341 • • • • 43.3 1.2 t t 7 5 42.28 7 6 1.18 3.11 4.82 18.90 1.71 23 94 Mars ... N.P Bessel ... 341 • • • • 27.8 48.0 • • 7 7 27.78 7 7 47.98 Mi +4.77} -420.90 —0.88} 160 OPPOSITION OF MARS, 1851-52, FEBRUARY 8, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. c. D. E. A a. Ad. Air. Wet. s. 8. s. s. s. ll. in. s. Rev. s. Rev. Inches. • • 35 Mara . . . S.F. 23.5 ( t 7 9 23.48 +3.10 86 27 38 39 30 31 33 33 34 35 36 37 38 Bessel ... 341 Mars . . N.P. • • 43.0 17.0 • • 7 9 42.98 7 11 16.98 7 11 37.58 7 13 7.98 7 13 27.28 720 7.18 7 20 26.98 7 21 42.28 4.66 3.78 4.S9 3.05 4.69 2.89 4.431 3.65 4.47 2.88 4.43 3.60 4.31 —19.50 20.60 19.30 ' 19.80 21.20 30.10 21.50 —1.56 0.81 1.64 1.541 0.82 1.55 0.71 27.890 Thrr. ,-rtt. 72°.3 Bar. red. to 32° F. 27.770 66.6 60.4 Besscl ... 341 Mars . . . S.F. Besscl ... 341 Mara S F • • • • 37.6 8.0 27.3 7.2 • • Bessel ... 341 Mars . . . N P 27.0 43.3 • • Bessel ... 341 Mare . . . S.F. 1.9 724 1.88 7 24 21.98 7 30 20.98 7 30 42.48 Bessel ... 341 Mara . . . N.P. 22.0 21.0 • • Bcssel ... 341 • • 42.5 • . 39 Mare . . . N.P. . . . . 12.0 . . 7 32 11.98 3.57J 40 41 43 43 44 45 46 Beascl ... 341 Mars . . . S.F. • • • • 33.5 5.0 7 32 33.48 7 35 4.98 7 35 25.78 7 36 34.08 7 36 S5.98 7 38 7.08 7 38 27.58 4.25J 2.78 4.30J 3.62J 4.27i 2.86 4.31i 21.50 20.80 21.90 20.50 0.68 1.53;- 0.65 1.45J Bessel ... 341 Mars . . . N.P. • • • • 25.8 34.1 • • • - Bessel ... 341 Mars . . . S.F. • • • • 56.0 7.1 • • Bessel ... 341 • • • • 37.6 • . 47 Mars . . . N.P. t t g t 30.3 t t 7 39 30.28 3.60 48 49 50 51 Bessel ... 341 Mars . . . S F • • 52.2 8 0 • • 7 39 52.18 7 41 7.98 7 41 28.98 7 42 49.98 4.26 2.78J 4.24 3.61 21.90 21.00 0.66 1.45J Bessel ... 341 Mars . . . N.P. 29 0 50.0 53 Bessel ... 341 • • • . 12.2 . . • . 7 43 12.78 4.25 22.20 0.64 53 Mars . . . S.F. 6.3 7 45 6.28 2.81 54 Bessel ... 341 . . . . 27.5 7 45 27.48 4.19 21.20 1.38 55 56 57 58 Mars . . N.P 25 1 7 46 25.08 7 46 47.48 7 47 54.48 7 48 16.08 3.56 4 29 2.87 +4.20i 22.40 —21.60 0.73 — 1.33J 27.886 Thcr. att. 71°. 5 Bar. rcil. to 32° F. 27.770 64.9 59.5 Bessel ... 341 Mara . . . S.F. Bessel ... 341 • • 47.5 54.5 16.1 • • Remarks. Night very much the same as the last, and measures of like value. Aa there was no change for the better, it waa considered useless to multiply them, after the planet had passed tin- meridian. Results. h. m. a. ». Rev. / /' Mean S. F. . . Fifteen transits . . . 7 16 26.9.5 19.767 . . 1.593 . . . . —0 31.05 Mean N. P. . . Fourteen transits . . 7 17 33.54 20 657 0 789 . — 0 15.38 h. m. m. a. h. m. s. Correction for i. chronometer at 7 16 . . —3 50.60 7 12 36.35 Correction for chronometer at 7 18 . . —3 50.60 7 13 42.94 1 6.59 AT SANTIAGO DE CHILE. FEBRUARY 8, 1853— Continued. Results — Continued. 1G1 h. m. bs in A. R. reduced to are . . 16.65 A N. 8. limbs micr. in rev. . . . . . 0.803=15.67 if A. R. iit Im. la 0 93 Variation of declination In 1m. 7t. . . — 0.19 15 72 Corr fn rti f Observed N. S. diameter . . . • . — 2.90 . . 13.35 i. // h. m. it . . . 0.03 A p at 7 14 . . 0.01 FEBRUARY 9, 1858. V H e f Chronometer time of transit. Mean of wires Micr. Planet— Star. !>.,,- Thermometers. Object. A. B. C. D. E. A a. A<5. liar. Air. Wet. <£ £ 9. 8. s. 8. s. h. m. s. Rev. m. s. Rev. Inches. • • 1 Mars . . . SF. 0.5 13.5 36.5 39.3 52.5 6 44 26.46 +3.6S 27.969 66.7 59.6 9 Bessel ... 341 37.0 50.0 3.4 16.3 29.3 6 46 3.90 —2.73 —1 36.74 +6.35 Thcr. att. 3 Mars . . . N.P. 39.3 52.1 5.3 18.1 31.0 6 48 5.14 +4.25J 73°. 8 4 Bessel ... 341 17.0 30.0 43.0 56.0 8.9 6 49 42.98 —2.87 1 37.84 7.121 Bar. red. to 33° F. 97.845 5 Mars . . . S.F. 21.0 34.0 47.0 59.9 13.0 6 51 46.98 +3.41 6 Bessel ... 341 58.0 11.0 24.0 37.0 49.9 6 53 23.98 —3.02 1 37.00 6.43 7 Mars . . . N.P. 49.5 2.5 15.6 28.5 41.5 6 55 15.52 +4.01 8 Bessel ... 341 27.8 41.0 53.8 6.6 19.5 6 56 53.74 —3. Hi 1 38.22 7.121 9 Mara . . . S.F. 30.4 43.5 56.5 9.5 22.7 6 58 56.52 +3.19 10 Bessel ... 341 8.2 21.0 34.0 46.8 59.8 7 0 33.96 —3.23 1 37.44 6.49 11 Mars . . . N.P. 19.3 32.2 45.2 58.1 11.1 7 2 45.18 +3.791 19 Bessel ... 341 58.0 10.8 24.0 36.8 49.6 7 4 93.84 —3.41 1 38.66 7.201 13 Mare . . . S.F. 32.3 45.3 58.2 11.3 24.4 7 7 58.30 +3.10 14 Bessel ... 341 10.4 23.3 36.3 49.0 2.0 7 9 36.20 —3.31 1 37.90 6.41 15 Mara . . . N.P. 30.5 43.5 56.7 9.6 22.6 7 11 56.58 +3.84 16 Bessel . , .341 10.0 22.8 36.0 48.9 1.7 7 13 35.88 —3.39 1 39.30 7.23 17 Mars . . . S.F. 45.3 58.2 11.9 24.0 37.0 7 16 11.14 +3.04 18 Bessel ... 341 23.6 36.5 49.5 2.5 15.5 7 17 49.52 — 3.45J 1 38.38 6.49* 19 Mars . . . N.P. 5.5 18.6 31.6 44.5 57.5 7 20 31.54 +3.72 SO Bessel ... 341 45.0 58.0 . . 24.7 37.5 722 11.30 —3.53 1 39.76 7.25 91 Mars . . . S.F. 2.0 15.0 28.2 41.0 54.3 725 28.10 +2.94 33 Bessel ... 341 . . 54.3 7.1 20.1 33.0 7 27 7.16 —3.59 1 39.06 6.53 93 Mnrs . . . N.P. 36.0 49.2 2.3 15.2 98.3 7 29 2.20 +3.71 34 Bessel ... 341 16.7 29.6 42.9 55.5 8.2 7 30 42.58 -3.62 1 40.38 7.33 25 Mars . . . S.F. 25.3 38.4 51.4 4.4 17.5 7 39 51.40 +2.91 96 Bessel ... 341 5.0 le.o 30.8 43.6 56.5 7 34 30.78 —3.68 1 39.38 6.59 27 Mara . . . N.P. 1.2 14.3 27.4 40.4 53.4 7 36 27.34 +3.74 98 Bessel ... 341 43.3 55.0 8.0 21.0 33.8 7 38 8.02 —3.65 1 40.68 7.39 29 Mars . . . S.F. 36.0 49.0 2.2 15.0 28.0 7 40 9.00 +2.86 30 Bessel ... 341 16.5 29.0 41.8 54.8 7.6 7 41 41.94 -3.66 1 39.94 6.52 31 Mars . . . N.P. 13.2 26.2 39.2 52.3 5.3 7 43 39.24 +3.781 32 Bessel ... 341 54.4 7.4 30.3 33.2 46.0 7 45 20.26 —3.70 1 41.02 7.48J 33 Mars . . . N.P. 47.5 0.5 13.5 26.5 39.6 8 47 13.52 +3.071 34 Bessel ... 341 45.2 58.0 li.o 23.9 8 48 58.08 —4.71 1 44.54 7.781 35 Mars . . . N.P. 20.5 33.5 46.5 59.5 12.7 8 50 46.54 +3.29 36 Bessel ... 341 5.5 18.3 31.5 44.4 57.0 8 52 31.34 —4.47 —1 44.80 +7.76 21 162 OPPOSITION OF MAES, 1851-52, FEBRUARY 9, 1853— Continued. 0} Chronometer time of transit. Planet— Star. Thermometers. B i £ Object. A. B. C. D. E. A a. A I. Air. Wet. fi d s. s. s. s. s. b. m. s. Rev. m. s. Rev. Inches. • • Z 37 Mars . . . S.F. 30.5 43.7 56.6 9.5 22.6 8 54 56.58 +2.83 27.953 64.5 59.9 38 Bcssel ... 341 14.5 27.5 ' 40.7 53.5 6.5 8 56 40.51 — 4.20', —1 43.96 +7.03J Tlior. att. 39 40 Mars , . . S.F. Bessel ... 341 7.8 52.3 20.8 5.1 33.8 18.1 46.8 31.0 59.8 43.8 8 58 33.80 9 0 18.06 +3.14J —3.90 1 44.26 7.04J 72°. 6 Bar. red. to 32° F. 27.833 41 Mars . . . S.F. 52.5 5.4 18.5 31.4 44.5 9 2 18.46 +3.35J 42 Bessel ... 341 • • 50.0 3.0 15.8 28.7 9 4 2.91 —3.74 —1 44.45 +7.091 Remarks. Fine night. Clean, steady images, and very satisfactory measures throughout. Mean S. F. . . First eight transits . Results. h. m. s. . 7 12 12.61 7 15 51.47 m. 8. Rev. — 1 38.230 .... +6.468 . . 1 39.482 .... 7.267 . . . . =2 6.06 . . 2 21.63 8 49 0 03 Mean S. F. . . Last three transits . h. m. . 8 58 36.28 m. s. . — 3 54.08 — 1 44.223 .... +7.058 . . . . =2 17.55 h. m. s. ..78 18.53 3 54 09 . . 7 11 57.38 . . 3 38.85 A P. F. limbs in A. R. reduced to arc . . . J8.78 . . — 2.86 A N. S. limbs micr. in rev. . . . n . 0.799 = 15.57 — 0.38 . . 15.92 Corr. for diam. of micr. wires . . — 2.20 . 12.99 h. m. m. s. 3 54 29 h. m. s. . . 8 45 5.74 3 54 30 . . B 54 41.98 . . 9 36.24 A P. F. limbs in A. R. reduced to arc Variation of A. R. in 9m. 36* it . . 6.70 . . + 7.68 . . 14.38 A N. S. limbs micr. in rev. . . . Variation of declination in 97n. 36s. . 0.714 = 13.92 + 0.99 — 2.20 h. m. A p at 7 9 . . . 0 13 Observed N. S. diameter .... h. m. 12.71 H .... 0.15 A a at 7 13 . . 0.14 A o at 8 55 . 0.14 FEBRUARY 10, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A i. Air. Wet. 8. s. 8. s. s. h. m. s. Rev. in. s. Rev. Inches. • • 1 Bcssel ... 341 47.0 0.0 12.9 6 43 47.00 +5.47 27.887 72.8 58.5 2 3 4 Mare . . . S.F. Bessel . . . 341 Mars . . . N.P. 19.5 15.5 13.0 32.6 28.6 26.0 45.5 41.6 39.0 58.6 54.5 52.0 11.6 7.5 5.0 6 47 45.56 6 50 41 .54 6 54 39.00 1.57 5.16 +2.07 +3 58.56 +3 57.46 —3.90 —3.09 Ther. att. 76°. 0 Bar, red. to 32° F. 27.756 AT SANTIAGO DE CHILE. 163 FEBRUARY 10, 1 •• . i < ..i.llnn, ,1. No. for reference. Object. Chronometer time of transit. Vteanofwire? Micr. Planet— Star. Bar. III-NM. nin-tiT-. A. B, C. D. E. 4 a. H. Air. Wet. s. 8. 8. 8. s. h. m. s. Rev. m. 8. Rev. Inches. « « 5 6 Besscl ... 341 Mars . . . S.F. 8.0 6.4 21.2 19.5 34.3 32.5 47.0 45.4 0.0 58.4 6 56 34.10 7 0 32.44 +4.97 1.19} +3 58.34 —3.77} 27.887 73.8 58.5 7 8 9 Bcsscl . . . 341 Mars . . . N.P. Besscl ... 341 53.3 50.0 8.5 6.4 3.0 21.5 19.4 16.3 34.5 32.5 29.0 47.5 45.3 42.2 0.6 7 3 19.38 7 7 16.10 7 9 34.52 4.76J 1.80 4.78} 3 56.72 2.96} Ther. att. 76°. 0 liar. reel, to 32° F. 27.756 10 Mars . . . S.F. • • 19.3 32.2 45.0 58.3 7 13 32.22 1.10 3 57.70 3.68} 11 Bessel . . . 341 26.5 39.5 52-5 5.5 18.5 7 17 52.50 4.63 12 Mars . . . N.P. 22.5 35.4 48.4 1.2 14.5 7 21 48 40 1.77 3 55.90 3.86 13 Besscl ... 341 38.2 51.3 4.3 17.2 30.2 7 24 4.2» 4.66 14 Mare . . . S.P. 34.7 47.6 0.7 13.7 26.8 7 28 0.70 1.09 3 56.46 3.57 15 Besscl ... 341 25.8 38.8 51.8 4.6 17.6 7 29 51.72 4.68 16 Mars . . . N.P. 21.0 34.1 47.1 0.0 13.2 7 33 47.08 1.80} 3 55.36 2.87} 17 Besscl ... 341 39.0 51.8 5.0 17.8 31.0 7 36 4.92 4.67 18 Mars . . . S.P. 34.8 47.5 0.7 13.7 27.0 7 40 0.74 1.10} 3 55.82 3.56} 19 Bessel ... 341 7.0 20.0 33.0 46.0 59.0 7 42 33.00 4.72 20 Mars . . . N.P. 1.5 14.5 27.5 40.5 53.5 7 46 27.50 2.15} 3 54.50 3.56} 21 Ili'ssi'l ... 341 11.2 24.3 37.3 50.1 3.2 7 48 37.22 4.81} 22 Mars . . . S.F. 6.5 19.5 32.5 45.4 58.6 7 52 32.50 1.301 3 55.28 3.51 23 Bessel ... 341 3.1 16.3 29.1 42.3 55.1 7 54 29.18 4.90 24 Mara . . . N.P. 57.0 10.0 23.2 36.0 49.4 7 58 23.12 2.16 3 53.94 3.74 25 Bcpsel ... 341 9.5 22.5 35.4 48.5 8 0 22.48 4.98 M Mars . . . S.F. 51.2 4.3 17.3 30.0 43.3 8 4 17.22 1.49} 3 54.74 3.48} 27 Bessel ... 341 46.0 59.0 12.0 25.0 38.0 8 6 12.00 5.10 28 Mars . . . N.P. 39.3 52.4 5.5 18.3 31.5 6 10 5.40 2.38 3 53.40 2.72 29 Bessel ... 341 . 14.1 27.2 40.0 53.0 8 12 27.08 5.26 3D Mars . . . S.F. 55.0 8.0 30.8 33.6 47.0 8 16 20.88 1.81} 353.80 3.44} 31 Bessel ... 341 . t 2.0 14.8 27.8 41.0 835 14.90 4.77J 32 Mars . . . N.P. 41.0 54.0 7.0 20.0 33.0 829 7.00 2.12} 3 52.10 3.65 33 Bessel ... 341 36.5 49.5 2.6 15.5 28.5 8 33 3.52 5.13} 27.898 64.6 55.7 34 35 36 Mnrs . . . S.F. Bessel ... 341 Mars . . . N.P. 29.5 1.5 53.0 42.5 14.5 0.0 55.5 27.7 19.0 8.5 40.5 32.0 21.7 53.5 45.0 8 36 55.54 8 42 27.54 8 46 19.00 1.83 5.73} +3.2-2 353.02 +3 51.46 3.30} —2.51} Thcr. att 73° .6 Bar. red. ic> :« r'. 37.774 Remarks. Niplit excellent ; images yharp and steady. There are two other stars preceding anil following this, respi c-iiv. ly. about 7Jj., and which coin- cide better in declination, hut they arc so very small that they will not bear illumination. The star used is not more than a 10} or lOUi magniluili at most. I can s'.-e well the dark portions of the planet with power 335, but am compelled to use very little light with the star. Results. h. in. H. m. s. R.'V. i if M.-n n S. F. . . . Nine Imnsits . . 7 39 ;,!i.::, + :i . . . . — 3.. . . = 1 !I.M M^a, iN. P. . .. . Nine tian*its . . . 7 47 :i-J...I + :( — 1.1 . . II .M.lll h. m. m. fl. h. in. s. Corr •••linn for chronometer at 740. . . — 3.r»7.'?l S:LHH.-|».. M.I. Inn.- 8, K. . . . . . . 7 *_. ; ( IIIIM NT .... 7 1:1 :::, -ii C, Orri-L-UIHI I'M CMIIMIOIIIUIUI ill * 1O . ... . ..i liili-ival 7 34.75 164 OPPOSITION OF MARS, 1851-52, FEBRUARY 10, 1852— Continued. Results — Continued. A P. F. limbs in A. R. reduced to are Variation of A. R. in 7m. 33*. Observed P. F. diameter .... h. m. 4 f at 7 34 21.91 - 5.87 16.04 0.07 A N. S. limbs micr. in rev 0.806=15.71 Variation of declination in 7m. 33). . . — 0.72 Corr. for diam. of micr. wires .... — 2.20 Observed N. S. diameter 12.79 h. m. " A p at 7 42 0.06 FEBRUARY 11, 1853. i Chronometer time of transit. Micr. Planet— Star. Bar. Thermometers. 1 ^ Object. A. B. C. D. E. Aa. A I. Air. Wet. j d 8. s. s. s. s. b. m. s. Rev. m. s. Rev. Inches. 0 „ 2 1 Bes*el ... 341 27.0 40.0 53.0 6.0 19.0 7 25 53.00 +2.48 27.956 63.9 57.8 3 Mars . . . S.F. 10.3 23.4 36.5 49.3 2.5 7 28 36.40 5. -H.; +2 43.40 +2.961 Thf r. att. 3 Bessel . . .341 24.5 37.5 50.5 3.4 16.5 7 32 50.48 1.311 73°. 9 4 Mars . . . N.P. 6.3 19.5 32.5 45.0 58.4 7 25 32.34 5.11 2 41.86 3.79J Bar. red. to 33° F. 27.831 5 Bessel ... 341 17.8 30.7 43.7 56.6 9.5 7 37 43.66 1.2PJ 6 Mars . . . S.F. 0.5 13.5 26.5 39.5 53.5 7 40 26.50 +4.36i 2 42.84 3.08 7 Bessel ... 341 32.1 45.0 58.0 11.0 23.6 8 31 57.94 — 1.68J 8 Mars . . . N.P. 10.9 23.8 37.0 50.0 3.0 8 34 36.94 +2. 13J 2 39.00 4.02 9 Bessel ... 341 . . . 27.5 40.3 53.0 8 36 27.30 — 1.S1J 10 Mars . . . S.F. 40.5 53.7 6.6 19.6 32.8 8 39 6.64 +1.47 2 39.34 3.28J 11 Bessel ... 341 31.5 44.5 57.4 10.0 23.4 8 40 57.36 -1.58 12 Mars . . . N.P. 9.5 22.6 35.6 48.5 1.7 8 43 35.58 +2.43 3 38.22 4.01 13 Bessel ... 341 t t . 38.6 41.5 54.6 8 46 28.60 — 2.91J 14 Mars . . . S.F. • • 54.7 7.5 20.6 33.7 8 49 7.63 +0.46 2 39.03 3.37J 15 Bessel ... 341 10.6 23.6 36.5 49.5 2.5 8 51 36.54 —2.57 16 Mars . . . N.P. 48.2 1.3 14.4 27.3 40.5 8 54 14.34 +1.57* 2 37.80 4.14J 17 Bessel ... 341 14.3 27.1 40.3 53.0 6.0 8 56 40.14 —2.25 18 Mars . . . S.F. 52.5 5.5 18.5 31.4 44.6 8 59 18.50 +l.I6i •2 38.36 3.41J 19 Bessel ... 341 46.6 59.5 12.5 25.5 9 0 59.53 — 1.92J 20 Mars . . . N.P. 10.5 S3.5 36.7 49.6 2.6 9 3 36.58 +3.24i +2 37.05 +4.17 Remarks. Night as preceding. The meridian circle observations show that this is the right star. Comparing it with H. C. 15707, it is a full magnitude •mailer, so Unit the estimate of last night is correct. There U a star rather brighter in the same parallel with Mars, and following about 1m. Results. h. m. R. Mean S. F. . . First two transit! . . 7 34 31.45 Mean N. P. . First transit . . . 7 »> 32.34 Mean N. P. . . Last four transits . 8 49 0.86 Mean S. F, . . Last three transits . . 8 49 10 92 1). m. m. 8. Correction for chronometer at 7 34 . . . —4 0.36 Correction lor chronometer at 7 36 . . . —4 0.36 A P. F. limbs in A. R. reduced to arc . . IB. 90 Observed P. F. diameter . . 18.14 m. s. Her. + 2 43.120 .... +3.022 2 41 .860 . . . . 3.795 2 38.017 .... 4.086 + 2 38.910 .... +3.358 Santiago sid. time S. F. . . . Santiago sid. time N. P. . . . , Interval =058.90 1 13.96 1 19.64 =1 5.45 h. m. s. 7 30 31.09 7 31 31.98 1 *89 A N. S. limbs micr. in rev 0.773=15.07 Variation of declination in 1m. 1«. . . — 0.(9 Corr. for diam. of micr. wires .... — 2.20 Observed N. S. diameter 12 "8 AT SANTIAGO DE CHILE. 165 FEBRUARY 11, 1853— Continued. Results — Conti nued . h. m. m. s. h. m. s. Correction for chronometer at 8 49 . . . — 4 0.52 8 45 0 34 Correction for chronometer at 8 49 . . . —4 0.52 . . . 8 45 10 40 . . 10 06 A P. F. limbs in A. R. reduced to arc . . . 13.39 A N. 8. limbs micr. in rev. . . . . . 0.728=14.19 Variation of A. R. in 10«. . . , . . . + 0.12 Variation of declination in 10«. . . . + 0.09 Observed P. F. diameter .... . . . 13.51 Corr. for diam. of micr. wirea . . . . — 2.20 . . 12,01 h. m. // b. m. A p at 7 29 . . . . 0.06 A p at 8 44 .... . . 0 08 A p at 7 30 . . . . 0.07 A p at 8 44 . . 0 06 FEBRUARY 13, 1833. Cloudy. FEBRUARY 13, 1852. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. An. Ai Air, Wet. 8. 8. 8. 8. 8. h. in. s. Rev. m. s. Rev. Inches. • • 1 H.C. . . . 15707 25.7 38.7 51.8 4.6 17.7 7 9 51.70 —3.331 28.033 63.8 58.9 2 Mars . . . S.F. 0.5 13.5 26.6 39.6 52.7 7 14 26.58 +2.98 +4 34.88 +6.311 Ther. att. 3 H.C. . . . 15707 17.5 30.8 43.8 56.6 9.7 7 18 43.68 —3.751 69° .2 4 Mars . . . N.P. 51.2 4.3 17.2 30.3 43.3 7 23 17. S6 +3.331 433.58 7.09 Bar. red. to 32° F. 27.923 5 H.C. . . . 15707 32.6 45.6 58.8 11.6 24.5 7 25 58.62 —3.731 6 Mars . . . S.F. 6.5 19.5 32.6 45.5 58.8 7 30 32.58 +2.70 4 33.96 6.431 7 H.C. ... 15707 20.5 33.0 46.0 58.7 11.9 7 32 46.02 —3.721 8 Mare . . . N.P. 52.5 5.5 18.6 31.5 44.5 7 37 18.52 +3.371 4 32.50 7.10 9 H.C. . . . 15707 1.5 14.5 27.5 40.4 53.5 7 39 27.48 —3.73 10 a Mars . . . S.F. 34.8 47.7 0.7 13.7 26.9 7 44 0.76 +2.73 4 33.28 6.46 11 H.C. . . . 15707 19.8 32.5 45.5 58.5 11.5 7 45 45.56 —3.721 12 Mars . . . N.P. 51.6 4.7 17.6 30.5 43.5 7 50 17.58 +3.52 4 32.02 7.241 13 H.C. . . . 15707 28.6 41.5 54.4 7.5 826 41.50 —2.63 14 Mara . . . S.F. 46.5 59.5 12.5 25.5 38.5 8 31 12.50 +3.991 4 31.00 6.621 15 H.C. . . . 15707 7.3 20.2 33.3 46.1 59.0 8 33 33.18 —2.271 38.023 62.8 58.8 16 Mars . . . N.P. 36.7 50.0 3.0 15.9 29.0 8 38 2.92 +5.11 4 29.74 7.381 Ther. ntt. 17 H.C. . . . 15707 50.0 3.0 16.0 29.0 43.0 8 40 16.00 —1.98 68°. 6 18 Mars . . . S.F. 20.4 33.5 46.5 59.4 12.5 8 44 46.46 +4.67 4 30.46 6.65 Bar. rod. to 3*2° F. 27.912 19 H.C. . . . 15707 18.3 31.5 44.6 57.4 10.5 8 46 44.46 —1.60 20 Mars . . . N.P. 47.5 0.5 13.5 26.5 39.5 8 51 13.50 +5.821 +4 29.04 +7.«1 Remarks. Images blurred and unsteady all the rvening, and measures only tolerable, a Recorded 43m. 55.7». at wire C. Results. li. m. s. ID. 9. Rev. ' " Mrllli S. F. MennN. P. Mean S. F. Mean .X. P. . . First three transits . . . First three transits . . . Last two transits . Last two transits . 7 29 39.97 . 7 36 57.79 . 8 37 59.48 . 8 44 38.21 + 4 34.040 . . . 4 32.700 ... 4 30.730 ... + 429.390 . . . . +6.403 7.145 6.637 , +7,405 .. . . =2 4.79 ... 2 19.20 ... 2 9.a> . . . ml 04,32 166 OPPOSITION OF MARS, 1851-52, FEBRUARY 13, 1838— Continued. Results — Continued. h. m. Correction for chronometer at 7 30 Correction for chronometer at 7 37 . m. s. — 4 6.71 — 4 6.72 h. m. 8. Santiago sid. time a. P 7 25 33.26 Santiago aid. time N. P 73351.07 Interval 7 17.81 A P. F. limbs in A. R. reduced to are. Variation of A. R. in 7m. 16s Observed P. P. diameter h. m. Correction for chronometer at 8 38 . Correction for chronometer at 8 45 . 20.10 — 5.01 15.09 — 4 — 4 6.84 6.86 A N. S. limbs micr. in rev ..... 0.742=14.46 Variation of declination in 7m. 18s. . . — 0.47 Corr. for diam. of micr. wires ... — 2.20 Observed N. S. diameter ..... 11.79 h m. s. Santiago sid. time S. F ....... 8 33 52.64 Santiago sid. time N. P ....... 84031.35 Interval ........... 6 38.71 A P. F. limbs in A. R. reduced to are ... 20.10 Variation of A. R. in 6m. 39» ....... — 4.56 Observed P. F. diameter ....... 15.54 h. m. A pat 7 23 0.13 Af>at731 0.14 AN. S. limbs micr. in rev ...... 0.768=14.97 Variation of declination in 6m. 39s. . . — 0.43 Corr. for diam. of micr. wires .... — 2.20 Observed N. S. diameter ..... 12.34 h. m. A pat8 3S ......... . . . . 0.13 Apat838 ............. 0.15 FEBRUARY 14, 1853. • 6 § Chronometer time of transit. Micr Planet— Star. Bar. ^hermometers. <£ £ Object. A. B. C. D. E. A a. A*. Air. Wet. £ Object. A. B. C. D. E. A a. A3. Air. Wet. 6 Z s. 8. 8. s. a. h. m. s. Rev. m. a. Rev. Inches. • • 25 Bessel ... 341 45.0 58.0 11.2 24.2 37.3 8 10 11.14 +3.02 27.992 60.2 26 Mars . . . S.F. 24.6 38.0 50.8 3.7 16.8 8 13 50.78 —1.99} +3 39.64 —5.01} Ther. alt. 27 Bessel ... 341 . . 45.5 58.7 11.5 24.5 8 15 58.56 + 1.61 7P.O 28 Mars . . . N.P. 10.7 23.6 37.0 49.8 3.0 8 19 36.82 —2.67 3 38.26 4.28 Bar. red. to 32° F. 27.876 29 Besset ... 341 14.7 27.7 . . 54.3 7.5 8 21 41.05 +1.801 30 Mars . . . S.F. 53.6 6.7 19.6 32.8 45.6 8 95 19.66 —3.12 3 38.61 4.92} 31 Bessel ... 341 14.4 27.4 40.4 53.5 6.5 8 27 40.44 +2.07 32 Mara . . . N.P. 52.2 5.1 18.2 31.0 44.5 8 31 18.20 — 2.14} 337.76 4.21} 33 Bessel ... 341 52.5 5.5 18.5 31.5 44.5 8 33 18.50 +2.35} 34 Mars . . . S.F. 31.0 44.2 57.2 10.0 93.3 8 36 57.14 —2.60 338.64 4.95J 35a Bessel ... 341 30.1 43.6 56.2 9.2 22.2 8 38 56.26 +2.63} 36 Mars . . . N.P. 7.5 20.5 33.5 46.3 S».5 8 42 33.46 —1.60 +3 37.20 —4.23} Remarks. Much haze: rendering the star very indistinct at times, and keeping the images always blurred and wavy. The star is more than a magnitude smaller than 11. C. Ii707, which is therefore put down as a 9tli. ' ft Recorded 40. Is. at wire A. Results. h. m. s. m. s. Rev. / ft Mean S. F. . . . Nine transits . . . 7 46 53.45 + 3 40 822 .... —5.093 . . . . =1 39.26 Mean N. P. . . . Nine transits . . . 7 53 36.76 + 3 39.576 .... —4.344 . . . .=124.66 h. in. m. 8. h. m. B. Correction for chronometer at 7 47 . . . — 4 9.63 Santiago sid. time S. F 7 42 43.82 Correction for Chronometer at 7 54 . . —4 9.64 7 49 27.12 Interval ......... 6 43.30 // H A P. F. limbs in A. R. reduced to arc . . . 18.69 A N. S. limbs micr. in rev 0.749=14.60 Variation of A. R. in 6m. 43s. . . . . . — 4.40 Variation of declination in 6m. 43i. — 0.37 Observed P. F. diameter . . 14.29 ('mi. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 12.03 h. m. // b. m. H A o at 7 41 . 0.10 A p at 7 48 . . . 0.08 FEBRUARY 15, 1853. si g B Chronometer time of transit. Planet— Star. Bar. Thermometers. K <£ V Object. A. B. C. 1). E. A a. A 1. Air. Wet. 4 6 S. h. m. 8. Rev. m. l. Rev. Inches. • • S5 1 llK.--.cl . . . 3-11 16.5 29.5 42.5 ' 55.4 6 18 29.51 +3.35J 98.028 57.3 2 Mars . . . S.F. 46.5 59.5 12.5 25 .-5 39.3 6 91 12.66 1.78 +2 43.15 —1.571 Ther. all. 3 4 Bessel ... 341 Mars . . . N.P. 3.6 16 5 59.0 29.6 12.0 42.5 21.7 55.5 38.0 6 2329.54 6 96 11.96 S.92J 2.10 9 49.42 t.M| 71°. 7 Bar. red. i., :<> K. 97.810 5 Besscl ... 341 12.5 25.5 38.5 51.3 4.5 628 38.46 2.75 6 Mars . . . S.F. 55.5 8.5 21.5 34.5 47.6 6 31 21.52 1.21} +2 43.06 —1.53} 168 OPPOSITION OF MABS, 1851-52, FEBRUARY 15, 1853— Continued. ?- Chronometer time of transit. Planet— Star. Thermometers. B Mein of wires Micr. Bar. c £ Is Object. A. B. C. D. E. A a. A I. Air. Wet. e e s. s. s. s. b. m. s. Rev. m. 8. Rev. Inches. „ „ z 7 Bessel ... 341 47.2 0.2 13.2 26.2 39.0 6 34 13.16 +2.54 28.032 61.2 55.0 8 Mars . . . N.P. 28.8 41.8 54.7 7.7 20.8 6 36 54.76 1.77 +2 41.60 —0.77 Ther. att. 9 Bessel ... 341 57.0 10.2 23.3 36.2 49.2 639 23.18 2.30} 68°. 8 10 Mars . . . S.F. 39.8 52.8 5.8 18.6 31.8 6 42 5.76 0.75 2 43.58 1.55} Bar. red. to 32° F. 27.923 11 Bessel ... 341 0.5 13.5 26.5 39.4 52.4 6 44 26.46 2.91 12 Mars . . . N.P. 41.5 54.5 7.7 20.8 33.7 6 47 7.64 2.18 2 41.18 0.73 13 Bessel ... 341 0.4 13.3 26.5 39.3 52.2 6 50 26.34 2.80 14 Mars . . . S.F. 42.0 55.2 8.3 22.3 35.3 6 53 8.62 1.32 2 42.28 1.48 15 Bessel ... 341 6.5 19.5 32.5 45.4 58.5 6 55 32.48 2.42} 16 Mars . . . N.P. 47.0 0.0 13.0 26.2 39.3 6 58 13.10 1.67 2 40.62 0.75} 17 Bessel ... 341 38.3 51.3 4.4 17.4 30.3 7 0 4.34 2.47 18 Mars . . . S.F. 19.5 32.6 45.5 58.6 11.8 7 2 45.60 1.01 2 41.26 1.46 19 Bessel ... 341 12.5 25.6 38.5 51.5 4.5 7 4 38.52 2.36 20 Mars . . . N.P. 53.0 6.0 19.2 32.0 45.5 7 7 19.14 1.66 2 40.62 0.70 31 Bessel . . .341 5.5 18.5 31.5 44.5 57.5 7 9 31.50 2.30 32 Mars . . . S.F. 45.3 59.5 12.5 25.5 38.5 7 12 12.46 0.78 240.96 1.52 23 Bessel ... 341 51.4 4.5 17.5 30.5 43.5 7 14 17.48 2.19 24 Mars . . . N.P. 31.4 44.5 57.4 10.5 23.5 7 16 57.46 1.51 2 39.98 0.68 25 Bessel ... 341 19.3 32.5 45.5 58.5 11.5 7 18 45.46 2.17 26 Mars . . . S.F. 0.0 13.2 26.2 39.2 52.5 7 21 26.22 0.77 2 40.76 1.40 27 Bessel ... 341 33.0 46.0 59.0 12.0 24.8 7 24 58.96 2.16} 28 Mare . . . N.P. 12.8 25.3 38.5 51.4 4.5 7 27 38.50 1.48} 2 39.54 0.68 39 Bessel . . 341 17.5 30.7 43.5 56.6 9.5 7 29 43.56 2.02} 30 Mars . , . S.F. 57.8 10.8 23.8 36.8 50.3 7 32 23.90 0.65 2 40.34 1.37} 31 Bessel ... 341 10.0 23.0 36.0 49.0 2.0 7 34 36.00 2.08 32 Mars . . . N.P. 49.0 2.0 15.0 28.0 41.0 7 37 15.00 1.48} 2 39.00 0.59} 33 Bessel ... 341 22.5 35.5 48.5 1.5 7 38 35.52 2.20 34 Mars . . . S.F. 49.3 2.2 15.3 28.3 41.5 7 41 15.32 0.84 2 39.80 1.36 35 Bessel ... 341 29.0 42.0 55.0 8.0 7 42 42.03 2.27 36 Mars . . . N.P. 54.5 7.5 20.5 33.7 46.7 7 45 20.58 +1.72 +2 38.55 —0.55 Remarks. Same remarks applicable as last night. Results. h. m. s. m. s. Rev. / if Mean S. P. . . . Nine transits . ..71 59.12 Mean N.P. . . . Nine transits . ..76 59.79 + 2 40 390 . . 0 698 . . —0 13.60 h. m. m. a. b. m. 8. Correction for chronometer at 7 2 . . . —4 12.00 Santiago sid. time S. F. ... ... 6 57 47.12 Correction for < chronometer at 7 7 . . . —4 12.01 ... 7 2 47.78 . . . 5 0.66 it it A P. F. limbs in A. R. reduced to arc . . . 17.80 A N. S. limbs micr. in rev. . . . . . 0.775=15.10 Variation of A. R. in 5m. Is. ... . . . — 3.12 Variation of declination in 5m. Is. . . — 0.23 Observed P. F. diameter .... . . . 14.68 Corr. for diam. of micr. wires . . . — 2.20 Observed N. 8. diameter . . . . . 12.67 h. m. A p at 6 56 . . . . 0.03 h. m. An at 71 . 0.01 AT SANTIAGO DE CHILE. 169 FEBRUARY 16, 185SJ. 1 Chronometer time of transit. Micr. Planet— Star. Thermometers j Object. A. B. C. D. E. An. At Bar. Air. Wei. 6 8. s. s. 8. 8. It. in. s. Rev. m. s. Rev. inches. • • la Bessel . . .341 46.0 59.0 11.8 24.7 6.28 58.91 —2.22 27.963 71.2 59.3 2 Mars . . . S.F. 17.5 30.8 43.8 56.5 9.7 6 30 43.66 0.63} +1 44.75 +1.58} 3 Bessel ... 341 2.5 15.3 28.2 41.0 6 33 15.28 5.03 Ther. an. 73°. 7 4 Mars . . . N.P. 32.8 45.8 58.6 11.5 24.5 B 34 58.64 2.72 1 43.36 2.31 Bar. red. to 32° F. 27.840 5 Bessel . . . 341 33.5 46.5 59.5 12.3 25.0 6 37 59.36 4.99 6 Mars . . . S.F. 17.8 30.5 44.0 56.6 9.8 6 39 43.74 3.38 1 44.38 1.61 7 Bessel ... 341 48.0 1.2 14.3 27.0 39.9 6 44 14.08 5.25 8 Mars . . . N.P. 31.0 44.0 57.1 10.0 23.2 6 45 57.06 2.89} 1 42.98 9.35} 9 Bessel ... 341 34.3 46.6 0.5 . . 25.5 6 47 59.96 5.38 10 Mars . . . N.P. 17.0 30.0 43.1 55.8 9.0 6 49 42.98 2.98 1 43.02 9.40 11 Bessel ... 341 54.5 7.5 20.5 33.3 46.0 6 53 20.36 5.60 12 Mars . . . S.F. 37.5 51.0 4.0 16.8 30.0 6 55 3.86 3.97} 1 43.50 1.62} 13 Bessel ... 341 37.7 50.6 3.6 16.6 29.6 6 57 3.62 5.71} 14 Mars . . . S.F. 21.2 34.3 47.4 0.2 13.5 6 58 47.32 4.10} 1 43.70 1.61 15 Bessel . . . 341 10.0 23.0 36.0 49.0 1.8 7 0 35.96 5.79} 16 Mars . . . N.P. 52.5 5.5 18.5 31.3 44.5 7 2 18.46 3.37 1 42.50 2.42} 17 Bessel ... 341 32.9 45.9 58.8 11.7 24.6 7 4 58.78 5.98 18 Mars . . . S.F. 15.9 29.0 42.0 54.8 8.2 7 6 41.98 4.32 1 43.20 1.66 191 Bessel ... 341 37.5 50.6 3.5 16.3 7 8 50.51 5.97 20 Mare . . . N.P. 6.5 19.6 32.6 45.6 58.8 7 10 32.62 3.55 1 42.11 2.42 21 e Bessel ... 341 52.0 5.0 18.0 30.8 43.5 7 13 17.86 6.16} 22 Mars . . . S.F. 34.6 47.5 0.8 13.8 26.8 7 15 0.70 4.62 1 42.84 1.54} 23 Bessel ... 341 59.2 12.0 25.0 37.8 50.7 7 18 24.94 6.17 24 Mara . . . N.P. 40.5 53.5 6.6 19.5 32.7 7 20 6.56 3.72 1 41.62 2.45 in Bessel ... 341 29.6 42.5 55.6 8.5 21.4 7 21 55.52 6.15} 26 Mars . . . S.F. 12.0 25.2 38.0 51.0 4.3 7 23 38.10 4.40 1 42.58 1.75} 27 Bessel ... 341 22.0 34.8 47.8 0.8 13.6 7 25 47.80 6.18 28 Mars . . . N.P. 3.0 16.0 29.3 42.3 55.5 7 27 29.22 3.72 1 41.42 2.46 29 Bessel ... 341 10.5 23.5 36.5 49.5 2.3 72936.46 6.19 30 Mars . . . S.F. 52.5 5.5 18.5 31.5 44.6 7 31 18.52 4.46 1 42.06 1.73 31 Bessel ... 341 46.0 58.5 11.5 24.5 37.3 7 33 11.56 6.90 32 Mars . . . N.P. 96.5 39.5 52.7 5.5 18.6 7 34 52.56 3.74 1 41.00 2.46 33 Bessel ... 341 29.5 42.0 55.0 7.8 90.7 7 36 55.00 6.20} 34 Mars . . . S.F. 10.5 23.5 36.8 49.7 2.7 7 3836.64 4.52 1 41.64 1.68} 35 Bessel ... 341 40.5 53.4 6.4 19.3 7 40 53.43 6.17 36 Mars . . . N.P. 8.0 21.0 • 34.0 47.0 0.0 7 42 34.00 3.67} 1 40.57 2.49} 37 Besscl ... 341 1.5 14.5 27.5 40.3 53.3 7 44 27.42 6.07} 38 Mars . . . S.F. 43.0 56.0 9.0 23.0 35.0 7 46 9.00 4.46 1 41.58 1.61} 39 Bessel ... 341 53.0 6.0 19.0 32.0 44.7 7 48 18.94 6.17} 40 Mara . . . N.P. 33.3 46.4 59.5 12.4 25.4 7 49 59.40 3.68 1 40.46 2.49} 41 Bessel ... 341 K.8 31.5 44.6 57.5 10.5 7 52 44.58 6.16 42 M:irs . . . S.F. 59.9 12.9 25.8 38.8 5^8 7 54 25.84 4.37 1 41.26 1.79 43 Bessel ... 341 5.4 18.2 31.0 44.0 56.6 7 57 31.04 6.01 44 Mars . . . N.P. 45.0 58.0 11.0 24.0 37.0 7 59 11.00 3.55 1 39.96 9.48 45 Bessel ... 341 42.5 55.5 8.5 21.5 34.5 8 1 8.50 5.95} 46 .M:irs . . . S.F. 23.4 36.4 49.4 2.3 15.6 8 2 49.42 —4.17 -11 40.92 +1.78J 22' 170 OPPOSITION OF MARS, 1851-52, FEBRUARY 16, 1853— Continued. j Chronometer time of transit. Planet— Star. Bar, Thermometers. 1 Object. A. B. C. D. E. A a. A (5. Air. Wet. £ 6 s. s. s. s. h. m. s. Rev. m. a. Rev. Inches. • « K 47 Bessel ... 341 38.0 51.0 4.0 16.8 29.8 8 6 3.92 —5.85 27.963 58.7 55.3 48 Mars . . . N.P. 17.5 30.5 43.7 56.6 9.7 8 7 43.60 3.34 +1 39.68 +2.51 Tlier. att. 49 50 Bessel ... 341 Mars . . . S.F. 30.6 10.5 43.0 23.5 56.0 36.5 8.8 49.5 21.8 2.5 8 9 56.04 8 11 36.50 5.72 3.94 1 40.46 1.78 70°. 0 Bar. red. to 32° F. 27.850 51 Bessel ... 341 6.5 19.5 32.5 45.5 58.4 8 13 32.48 5.62 52 Mars . . . N.P. 45.8 58.6 11.7 21.8 37.8 8 15 11.74 ::.] i; 1 39.26 2.47J 53 Bessel ... 341 53.5 6.4 19.5 32.3 45.1 8 17 19.36 5.491 54 Mars . . . N.P. 32.5 45.5 58.5 11.5 24.5 8 18 58.50 2.94 1 39.14 2.551 55 Bessel ... 341 59.8 12.8 26.0 38.8 51.6 8 21 25.80 5.34J 56 Mars . . . S.F. 39.8 52.8 5.9 18.8 32.0 8 23 5.86 3. .MI; 1 40.06 1.84 57 Bessel ... 341 21.0 33.8 46.8 59.8 12.6 8 24 46.80 5.22 58 Mars . . . S.F. 0.5 13.6 36.5 52.8 8 26 26.58 3.42 1 39.78 1.80 59 Bessel ... 341 55.0 7.5 21.0 34.0 46.8 8 28 20.86 5.111 60 Mars . . . N.P. 33.5 46.5 59.5 12.5 25.7 8 29 59.54 —2.55 +1 38.68 +2.561 Remarks. a Blurred and unsteady during all the observations from c Much better. a to />. d Sharp and steady. All that follow are fine observations. Results. h. m. s. m. B. Rev. / // Mean S. F. . . Fifteen transits . . , 7 30 56.52 + 142.181 . . . +1.694 . . . . =033.02 Mean N. P. . . Fifteen transits . . . 7 33 58.39 + 1 41.051 . . . +2.456 . ... =0 47.87 h. m. m. B. h. m. s. Correction for chronometer at 7 31 . . . —4 14.57 Santiago sid. time S. F. . . ... 7 26 41.95 Correction for chronometer at 7 34 . . . —4 14.58 ... 7 29 43.81 ... 3 1.86 A P. F. limbs in A. R. reduced to arc . 16.95 A N. S. limbs micr. in rev. . . . , 0.762 = 14.85 Variation of A. R. in 3m. 2s — 1.78 Variation of declination in 3m. 2s. . . — 0.11 Observed P. F. diameter 15.17 Corr. for diam. of micr. wires . . — 2.20 Observed N. 8. diameter . . . . . 12.54 h. m. „ h. m. ii A /> at 7 26 . 0.03 A o at 7 29 . 0.05 FEBRUARY 17, 185S8. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A 4. Air. Wet. s' s. B. s. s. h. in. s. Rev. s. Rev. Inches. O • 1 2 Bessel ... 341 Mars . . . S.F. 53.6 6.6 19.8 9.0 32.9 22.3 46.0 5.0 6 30 19.76 6 31 9.16 +3.66 +7.571 +49.40 +3.91J 27.960 59.8 54.6 3 4 5 Bessel ... 341 Mars . . . N.P. Bessel ... 341 38.5 27.0 0.5 51.5 13.5 4.5 53.2 36.5 6.1 19.2 6 36 4.43 6 36 53.13 6 39 26.43 —1.60 +3.19 48.70 4.79 Tlier. att. 70°. 3 Bar. red. to 32° F. 27.846 6 Mars . . . S.F. 49.5 3.0 16.0 29.0 42.3 6 40 15.96 +2.381 +49.53 +4.05 AT SANTIAGO DE CHILE. 171 FEBRUARY 17, 1853— Continued. • u Chronometer time of transit. Planet— Star. Thermometers. 1 [pan of wi Micr Rnr i £ Object. A. B. C. D. E. A a. A 4. Air. Vet. c 8. s. l. l. h. m. s. Rev. a. Rev. Inches. • « 2 7 Bessel ... 341 j 37.0 50.0 3.0 . . . 6 44 2.93 — 1.691 27.960 59.8 54.6 8 Mars . . . N.P. 26.0 51.5 4.3 17.5 6 44 51.59 +3.001 +48.66 +4.70 Ther. att. 9 Bessel ... 341 54.5 7.5 20.5 6 48 20.43 — 1.901 70°. 3 10 Mars . . . SF. 43.5 56.5 9.5 22.5 36.0 6 49 9.60 +2.11* 49.17 , „, Bar. red. 4>tw to 32" F. 27.846 11 ' Bessel ... 341 2.6 . . 6 52 2.58 —1.93 12 Mars . . . N.P. 37.5 50.5 3.5 6 52 50.49 +2.81 47.91 4.74 13« Bessel ... 341 j 11.7 t , , , 6 54 11.68 -1.94 14 Mars . . . S.F. 47.5 0.8 13.6 • • 6 55 0.63 +2.22 48.95 4.16 15 Bessel ... 341 25.6 6 56 25.58 — 1.701 1C, Mais . . . N.P. • • 0.5 13.5 26.5 • • 6 57 13.49 +3.07 47.91 4.771 17 Bessel ... 341 i 37.6 . , 6 53 37.58 -1.77* 18 Mars . . . S.F. • • 13.4 26.3 39.3 • • 6 59 26.33 +2.331 48.75 4.11 19 Bessel . . 341 46 5 7 0 46.48 — 1.871 20 Mars . N.P. 21.2 34.0 47.0 7 1 34.06 +2.961 47*58 ' 4.84 ai Bi-sscl ... 341 50.0 7 3 49.98 —1.90 22 Mars . . . S.F. 25.5 38.5 51.4 t j 7 4 38.46 +2.21 48.48 4.11 23 Bessel ... 341 . t 57.5 ~ 5 57.48 —1.92 24 Mnr» . N.P. 31.6 44.6 57.5 7 6 44.56 +2.89 47.08 4.81 25 Bessel ... 341 16.0 7 7 15.98 —1.97 26 Mars . . . S.F. • • 51.2 4.3 17.2 • • 7 8 4.23 +2.17 48.25 4.14 27 Bessel . . 341 . 39.0 . t 7 10 38.98 — 1.941 28 Mars . . . N.P. 13.0 26.0 39.0 7 11 25. S9 +2.83 47.01 4.771 29 Besscl ... 341 52.0 7 12 51 .98 —2.03 30 Mars . . . S.F. • • 27.0 40.0 53.0 7 13 39.99 +2.09 48.01 4.18 31 i Bessel . . 341 48.0 7 15 47.98 —2.16 32 Mars . . . N.P. 22.0 35.1 48.1 • • 7 16 35.06 +2.67 47.08 4.83 .13 Bessel ... 341 7.6 7 18 7.58 —2.051 34 Mars . . . S.F. 42.5 55.3 8.4 7 18 55.39 +2.071 47.81 4.13 35 Bessel ... 341 17.0 . 7 20 16.98 -2.10 36 Mare . . . N.P. 50.5 3.5 16.5 • • 7 21 3.49 +2.7S 48.51 4.82 37 Bejsel ... 341 12.0 7 22 11.98 —2.091 38 Mars . S.F. 46.5 59.6 12.5 72259.53 +1.99 47.55 4.081 39 Bp.rlSPl . . 341 33 1 7 24 33.08 —2.201 40 Mars . . . N.P. . . 6.5 19.5 32.6 . . 7 25 19.53 +2.68 46.45 4.881 41 Hi's^el _ t 3-ji 37 4 7 27 37.38 1 — 2.16t 42 Mars . . . S.F. . . 11.6 94.6 37.5 7 28 24.56 +2.001 47.18 4.17 43 Bessel . . 341 39.0 7 29 38.98 -2.14 44 Mars . . . N.P. 12.5 25.5 38.5 . • 7 30 25.49 +2.70 46.51 4.84 45 llt's^fl . 341 7 31 35.98 —2.16 46 Mars . . . S.F. 10.2 23.0 36.0 . . 7 32 23. 06 +2.011 47.08 4. 17| 47 Bessel ... 341 34.0 7 33 33.98 -2.16 48 M:ir* N P. 7.3 20.3 33.3 7 34 20.29 +2.70 46.31 4.86 49 Bessel ... 341 27.0 7 35 26.88 -2.091 50 Mara • . . S.F. . . 1.5 14.3 27.4 • • 7 36 14.39 +2.03 47.41 4.11; 51 Bestal ... 341 30.5 . 7 37 30. 4S -2.06 52 Mars ... N.P 3.5 16.5 39.5 7 38 16.49 +S.8I +46.01 +4.87 172 OPPOSITION OF MAES, 1851-52, FEBRUARY 17, 1853— Continued. «j Chronometer time of transit. Planet — Star. Thermometers. I Vfpan of \v' Micr. Bar. • £ I- Object. A. B. C. D. E. A a. Ad. Air. Wet. •2 6 s. s. 9, e. 9. It. m. s. Rev. s. Kev. Inches. 0 | •g. 53 Bessel . . 341 18.5 7 39 18.48 —2.05 27.962 59.0 52.3 54 Mars . . . S.F. . 52.3 5.4 18.4 7 40 5.36 +2.10 +46.88 +4.15 Thcr. an 55 Bessel ... 341 f 28.1 t t 7 41 28.08 — 1.97J 66". 7 56 Mars . . . N.P 1.0 14.0 27.0 7 42 13.99 +2.90* 45.91 4.88 Bar. red to 32° F 27.860 57 Bessel . .' . 341 5.2 . . 7 44 5.18 — 2.04J 58 Mars . . . S.F. 38.6 51.7 4.6 • • 7 44 51.69 +2.13* 46.51 4.18 59 Bessel . . . 341 8.5 7 46 8.48 — 1.95J 60 Mars . . . N.P • • 41.0 54.3 7.2 7 46 54.16 +2.91 45.68 4.86J . 61 Bessel ... 341 45.1 7 49 45.08 —1.89 • Mara . . . S.F. 18.6 31.7 44.5 • •' 7 50 31.59 +2.30J 46.51 4.19* 63 Bessel ... 341 54.3 t , t 7 51 54.28 —1.84 64 Mars . . . N.P. • • 36.6 39.8 52.8 • • 7 52 39.73 +3.07 45.45 4.91 65 Bessel ... 341 , . , t 1.1 , t 7 54 1.08 —1.79 66 Mars . . . S.F. • • 34.3 47.5 0.3 • • 7 54 47.36 +2.38 46.28 4.17 67 Bessel ... 341 15.3 . . 7 56 15.28 -1.78J 68 Mars . . . N.P. 47.0 0.5 13.6 • • 7 57 0.36 +3.12J 45.08 4.91 69 Bessel ... 341 . . 10.5 t 7 58 10.48 —1.72 70 Mars . . . S.F. .• • 43.8 56.8 9.8 • • 7 58 56.79 +2.48J 46.31 4.20* 71 Bessel . . .341 13.3 8 0 13.28 —1.70 72 Mars . . . N.P. • • 45.5 58.5 11.5 • • 8 0 58.49 +3.23J 45.21 4.93J 73 Bessel ... 341 , 7.5 8 2 7.48 —1.61 74 Mars . . . S.F. 40.6 53.5 6.4 8 2 53.49 +2.56 46.01 4.17 75 Bessel ... 341 Si. 5 g 8 5 33.48 —1.53 76 Mars . . . N.p, 5.5 18.5 31.3 8 6 18.43 +3.40 44.95 4.93 77 Beasel ... 341 37 0 8 7 36.98 — 3.26 78 Mars . . . S.F. • • 9.8 22.7 35.5 . . 8 8 22.66 +0.96J 45.68 4.22* 79 Bessel ... 341 6.3 8 10 6,28 —3.20 80 Mars . . . N.P. 38.0 51.0 3.8 8 10 50.93 +1.71 44.65 4.91 81 Bessel ... 341 56.6 8 12 56.58 — 3.09J 82 Mars . . . S.F. • • 29.4 42.3 55.3 8 13 42.33 +1.08 45.75 4.17* 83 Bessel ... 341 5 0 8 15 4.98 3.09^ 84 Mars . . . N.P. 36.5 49.6 2.5 8 15 49.53 +1.88 44.55 4.97* 85 Bessel ... 341 8.0 8 17 7.98 —2.95 86 Mars . . . S.F. 40.5 53.5 6.5 8 17 53.49 +1.24 45.51 4.19 87 Bessel ... 341 6 5 8 20 6 48 n noi 88 Mars . . . N.P. • • 37.6 51.0 4.0 . . 8 20 50.86 — •.M| +2.03J 44.38 4.97 89 Bessel ... 341 14.0 8 21 13 98 g gg 90 Mars . . . S.F. • • 46.5 59.5 12 5 8 21 59.49 +1.40 45.51 4.22 91 Bessel ... 341 36.4 . , m 8 S3 36.38 -8.75* 93 Mars . . . N.P. 7.5 20.5 33.5 • • 8 24 20.49 +2.20 44.11 4.95* 93 Bessel ... 341 . . 15.6 8 26 15.58 — 2.5PJ 94 Mare . . . S.F. 47.6 0.6 13.6 • • 8 27 0.59 +1.68 45.01 4.26* 95 Bessel ... 341 . . 3.6 8 88 3.58 —2.53 96 Mars . . . N.P. • • 34.4 47.7 0.5 8 28 47.53 +2.47 +43.95 +5.00 AT SANTIAGO DE CHILE. 173 FEBRUARY IT, 1852-Contlnned. Remarks. At commencement images indifferently defined, and motion by no means uniform ; later they beeame better, and the work is very satisfactory. o Sharp. b Blurred and unsteady. Results. h. m. s. s. Rev. / it Mean S. F. . Twenty-four transits . . 7 33 23.59 + 47.230 .... +4.145 . . . . = 1 20.79 Mean N. P. . Twenty-four transits . . 7 36 0.76 + 46.152 .... +4.866 . . . . =1 34.84 h. m. m. s. h. ru. s. Correction for chronometer at 7 33 . . — 4 17.37 7 29 6 22 Correction for chronometer at 7 36 . . . — 4 17.38 7 31 43 38 2 37 16 A P. F. limbs in A. R. reduced to arc . . . 16.17 0.721= 14.05 Variation of A. R. in 2w. 37s. . . . . . — 1.44 Variation of declination in 2m. 37j. — 0.07 Observed P. F. diameter . . 14.73 Corr. for diam. of micr. wires . . . — 2.20 11.78 h. m. „ h. m. . . . 0.08 A p at 7 31 . . 0 19 FEBRUARY 18, 1853. Up to 'Ji. 50m. the image of the planet w;is like a reflection from disturbed mercury, and it was not possible to make a measure. At that time the lamps went out, and could not be made to burn afterwards. FEBRUARY 19, 1853. V B • Chronometer time of transit. Mean of wires. Minr Planet — Star. Kir Thermometers. C Object. A. B. C. D. E. . Micr. Aa. At liar. Air. Wet. • D s. 9. B. 8. s. h. m. s. Rev. + 8. Rev. Inches. O « M 1 Mars . . . S.F. 50.7 4.0 17.0 30.0 6 46 16.88 +3.481 27.974 61.9 57.7 9 Bessel ... 341 55.3 8.0 20.3 34.0 6 47 7.93 —3.59 —51.05 +7.071 Thcr. »tt. 3 Mars . . . N.P. , . 16.5 29.6 42.5 t t 6 49 29.53 +3.84 71°. 2 4 Bessel ... 341 21.7 48.0 6 50 21.93 —4.04 52.40 7.86 Bar. red. to 32° F. 27.858 5 Mars . . . S.F. 5.5 18.8 31.7 44.6 . . 6 53 31.61 +3.051 6 Bessel . . 341 22.8 • • 6 54 22.78 -1 Hi 51.17 7.17 7 Mars . . . N.P. 14.5 27.5 40.5 t f t f 6 56 40.43 +3.64 8 Bessel ... 341 33.0 , 58.8 C 57 33.96 —4.11 52.53 7.75 9 Mars . . . S.F. 30.5 43.5 55.4 < ( . . 6 59 56.38 +2.801 10 Bcssel ... 3-11 35.3 47.5 1.0 14.0 7 0 47.98 —4.27 51.60 7.071 11 Marx . . . N.P. 38.5 51.5 4.6 . . 7 4 4.46 +3.44 12 !>••". -1 ... 3-11 31.5 44.5 57.5 • • 23.5 7 4 57.48 —4.33 53.02 7.T7 13 Mars . . . S.F. 3.5 16.8 29.8 f t 7 7 29. C3 +2.66 14 Bessel . . .341 • • 8.8 21.8 34.8 47.8 7 821.83 —4.44 52.20 7.10 15 Mars . . . N.P. 17.4 30.5 43.4 . . 7 11 43.36 +2.65 16 Bessel . . . 341 10.5 23.3 —5.101 52.97 7.751 17 Mars . . . S.F. 10.3 23.5 36.5 7 19 36.36 +1.491 16 li.'ssi'l ... 341 28.8 7 211 ' —5.6IJ 52.42 7.11 19 Mara . . . N.P. 5.5 18.5 31.5 . 7 •!! 31.43 +2.25 20 B«M| ... 341 11.7 £•>.!> 7 25 24. M - :,..t Mean S. F. . . Nine transits . . 7 17 18.18 — 52.340 .... +7.083 . . • . =2 18.05 Mean N. P. . . Eight transits . . . 7 17 20.72 — 53.295 .... +7.784 . . . . =231.71 h. m. m. s. h. m. s. Correction for chronometer at 7 17 '. . . — 4 22.49 Correction for chronometer at 7 17 . . . — 4 22.49 Santiago sid. time N. P. . . ... 7 12 58.23 Interval 2 54 n A P. F. limbs in A. R. reduced to arc . . . 14.32 A N. S. limbs micr. in rev. . . . . .0.701 = 13.66 Variation of A. R. in 3s . . . ± 0.00 Variation of declination in 3s. . ... ± 0.00 Observed P.P. diameter . V . . . 14.32 Corr. for diam. of micr. wires . ... — 2.30 Observed N.S. diameter . . 11 46 h. m. „ h. m. // A f at 7 13 . . . . .0.14 A a at 7 13 . 0.15 FEBRUARY 3O, 1853. a Chronometer time of transit. Planet — Star. Thermometers. <2i £ s Object. A. B. C. D. E. A a. A I. Air. Wet. 8. 8. 8. s. s. h. in. s. Rev. m. s. Rev. Inches. • • 1 Mars . . . S.F. 2.7 15.7 38.8 41.6 54.7 6 19 28.70 +3.734 28.019 62.5 59.9 2 Bessel ... 341 50.0 3.0 6 21 2.96 —4.854 —1 34.36 +7.59 3 Mars . . . N.P. 56.0 8.7 21.8 35.0 47.8 6 23 81 .86 +3.23 Tlior. art. 73°. 0 4 Bessel ... 341 45.8 58.2 . . . . 6 34 58.16 —5.06 1 36. HO 8.29 Bar. red. 5 Mitrs . . . S.F. 4.4 17.5 30.5 43 5 56.6 6 27 30.50 +1.90 27.897 6 Bessel ... 341 53.0 6.0 18.8 31.6 6 39 5.88 —5.67 —1 35.38 +7.57 AT SANTIAGO DE CHILE. 175 FEBRUARY iJO, 1852-Contlnn«d. V 1 s Chronometer time of transit. M i • Planet— Star. Thermometers 1 Object. A. B. C. D. E. m micr. A a. A* Bar. Air. Wet. 0 s. s. Rev. m. B. Rev. Inches. I • 7 8 Mars . . . N.P Bessel ... 341 29.5 6.0 42.3 18.5 55.4 31.5 8.3 44.5 21.3 57.3 6 30 55.36 6 32 31.56 +2.49 —5.791 —1 36.20 +8.281 28.019 62.5 59.9 9 Mars . . . N.P. 9.5 22.6 35.5 48.5 2.0 6 34 35.62 +2.23 Ther. att 73°. 0 10 Bessel ... 341 47.0 59.8 12.0 25 0 6 36 12.40 —6.03 1 36.78 8 26 Bar. red to 32° F 11 Mars . . . S.F. 16.3 29.4 42.8 55.3 8.5 6 38 42.46 + 1.42 27.897 12 Bessel . . 341 52.5 5.5 18.5 31.2 44.0 6 40 18.34 -6.12 1 35.88 7.54 13 Mars . . . S.F. 39.3 52.4 5.5 18.5 31.7 6 42 5.48 +1.25 14 Bessel ... 341 15.5 28.5 41.5 54.5 7.3 6 43 41.46 —6.30 1 35.98 7.55 15 Mars . . . N.P. 5.0 18.0 31.2 44.1 57.3 6 48 31.12 +4.071 16 Bessel ... 341 42.0 55.2 8.2 21.2 33.8 6 50 8.08 —4.271 1 36.96 8.35 17 Mara . . . S.F. 39.0 52.0 5.2 18.1 31.0 6 52 5.06 +3.17 18 Bessel ... 341 28.5 41.8 7.5 6 53 41.63 —4.391 1 36.57 7.561 19 Mars . . . N.P. 17.6 30.6 44.0 56.6 9.6 6 56 43.68 +3.72 20 Bessel ... 341 55.3 8.2 21.4 34.3 47.0 6 58 21.24 —4.521 1 37.56 8.241 21 Mars . . . S.F. 8.0 21.2 34.3 47.3 0.5 7 1 34.26 +2.85 22 Bessel ... 341 45.0 58.0 10.8 23.7 36.5 7 3 10.80 —4.681 1 36.54 7.53} 23 Mars . . . S.F. 32.0 45.0 58.0 11.0 24.0 7 4 58.00 +2.67 24 Bessel ... 341 8.6 21.8 34.8 47.8 0.6 7 6 34.72 —4.85 1 36.72 7.52 25 a Mars . . . N.P. 33.2 46.5 59.5 12.8 25.8 7 9 59.56 +3.34 26 Bessel ... 341 12.5 • • 37.5 50.6 3.5 7 11 37.78 —4.90 1 38.22 8.24 274 Mare . . . N.P. 17.7 31.0 44.0 57.0 9.7 7 13 43.88 +3.29 28 Bessel ... 341 56.2 9.0 22.3 35.3 48.0 7 15 22.16 -4.961 1 38.28 8.251 29 c Mars . . . S.F. 4.5 17.6 30.5 43.6 56.5 7 SO 30.54 +2.501 30 Bessel ... 341 42.3 55.0 8.0 20.8 33.7 7 23 7.96 —5.051 1 37.42 7.56 31 d Mars . . . N.P. 55.5 8.5 , , 35.0 48.0 724 21.74 +3.18} 32 Bessel ... 341 34.3 47.3 0.4 13.3 26.2 7 26 0.30 —5.08 1 38.56 8.26} 33 Mars . . S.F. 56.3 9.5 22.5 35.5 48.5 798 32.46 +2.38 34 Bessel ... 341 47.0 59.8 12.8 25.7 729'59.86 —5.17 1 37.40 7.55 35 Mars . . .N.P. 29.2 42.5 55.6 8.5 21.5 7 33 55.46 +3.07} 36 Bessel ... 341 8.0 21.0 34.0 46.8 0.0 7 34 33.96 —5.18 1 38.50 8.25} 37 Mara . . . S.F. 33.0 46.0 59.0 12.2 25.0 7 37 59.04 +2.40 38 Bessel ... 341 10.6 23.8 36.8 49.8 2.6 7 39 36.72 —5.191 1 37.68 7.591 39 Mars . . . N.P. 59.0 12.5 25.3 38.8 51.7 7 41 25.46 +3.11 40 Bessel ... 341 38.5 51.2 4.2 17.1 30.3 7 43 4.26 —5.13 1 38.80 8.34 41 Mars . . . S.F. 30.8 43.8 56.8 9.7 22.6 7 46 56.74 +2.45 42 Bessel ... 341 9.5 22.0 35.3 48.0 1.0 7 4835.16 —5.101 1 38.42 7.55| 43 Mars . . . N.P. 12.0 25.0 38.0 51.0 3.7 7 50 37.94 +3.19 44 Bessel ... 341 51.5 4.2 17.5 30.0 43.0 7 53 17.24 —5.07 1 39.30 8.96 45 Mars . . . S.F. 12.5 25.3 38.1 51.1 4.5 7 54 38.30 +2.54 46 Bessel ... 341 51.0 3.6 • • 30.0 42.6 7 56 16.80 —5.02 1 38.50 7.56 47 Mars . . . N.P. 10.7 23.6 36.8 49.8 2.5 7 59 36.68 +3.36J 48 Bessel ... 341 3.5 16.5 29.4 43.5 8 1 16.51 —4.93 1 39.83 8.291 49 Mara . . . S.F. 47.3 0.5 13.4 26.3 39.5 8 3 13.40 +2.73 50 Bessel ... 341 26.1 39.0 51.6 4.6 17.7 8 4 51.80 —4.86 1 38.40 7.59 51 Mare . . . N.P. 9.1 32.0 35.9 48.1 1.2 8 6 35.12 +3.50 53 Bessel ... 341 48.8 1.7 14.9 37.8 40.6 8 8 14.76 —4.74 -1 39.64 +8.34 176 OPPOSITION OF MARS, 1851-52, FEBRUARY 2O, 1853— Continued. V Chronometer time of transit. Planet — Star. Thermometers. E Mean of wires. Micr. Bar. <£ £ Object. A. B. C. D. E. A a. A<5. : Air. Wet. £ 0 8. s. s. s. s. h. m. s. Rev. m. B. Rev. Inches. « 0 Z 53 Mars . . . S.F. 47.2 1.0 14.0 27.0 40.2 8 10 13.88 +2.911 28.014 62.2 57.1 54 Bessel ... 341 27.2 40.3 53.2 6.0 19.0 8 11 53.14 —4.621 —1 39.26 +7.54 Ther. att. 55 Mars . . . N.P. 32.5 46.0 58.8 11.7 25.0 8 13 58.80 +3.721 69°. 6 56 Bessel ... 341 13.0 25.7 38.6 51.6 4.6 8 15 38.70 —4.57 1 39.90 8.291 Bar. red. to 32° F. 27.903 57 Mars . . . S.F. 4.6 18.0 31.0 43.7 57.0 8 17 30.86 +3.141 58 Bessel ... 341 44.0 57.3 9.8 23.0 36.0 8 19 10.02 —4.44 1 39.16 7.581 59 Mars . . . N.P. 35.5 48.5 1.5 14.5 27.6 8 21 1.52 +4.00 60 Bessel ... 341 15.5 28.7 41.8 51.8 7.6 8 22 41.68 —4.28 —1 40.16 +8.28 Remarks. Except the few observations otherwise noted, the evening has been good and measures satisfactory. a Blurred. 4 Worse. c Tolerably good. d Sharp. Results. h. m. s. m. s. Rev. / // Mean S. F. . . Fifteen transits . . . 7 19 3.31 — 1 37.171 . . . +7.560 . . . . =227.34 Mean N. P. . . Fifteen transits . . . 7 23 13.59 -1 38.333 . . . +8.264 . . . . =241.06 h. m. m. s. h. m. s. Correction for chronometer at 7 19 . . . — 4 25.37 Correction for chronometer at 7 23 . . . —425.38 . . 4 10 27 tt // A P. F. limbs in A. R. reduced to arc . . . 17.43 A N. S. limbs micr. in rev. . . . . 0.704 = 13.72 Variation of A. R. in 4m. 10s. . . . . . —1.87 Variation of declination in 4m. 10s. . — 0.01 . . . 15.56 Corr. for diam. of micr. wires g 20 Observed N. S. diameter .... 11.51 h. m. li h. m. // A f at 7 16 . . . . 0.15 A f at 7 20 . ». . 0.16 FEBRUARY HI, 1853. S £ Chronometer time of transit. Planet — Star. Thermometers. ! Object. A. B. C. D. E. A a. A(J. Air. Wet. i s. s. 8. s. s. h. m. s. Rev. m. s. Rev. Inches. a • i Mars . . . S.F. 1.0 14.3 27.2 40.2 53.4 6 25 27.22 + 1.39 27.906 73.8 60.8 2 Bessel ... 341 18.2 • . 44.3 56.9 10.0 6 27 44.10 —6.08 —2 16.88 +7.47 3 Mars . . . N.P. 0.0 13.0 26.2 39.0 52.3 6 34 26.10 +3.99 Thcr. ait. 76°. 7 4 Bessel ... 341 18.5 31.5 44.5 57.4 10.2 6 36 44.43 — 4.221 2 18.32 8.311 Bar. red. to 32° F. 5 Mars . . . S.F. 51.8 5.0 18.0 30.8 43.6 6 39 17.84 +3.02 27.773 6 Bessel ... 341 9.5 22.5 35.3 48.2 1.0 6 41 35.30 —4.45 2 17.46 7.47 • 7 Mars . . . N.P. 5.0 18.2 31.0 44.0 57.2 6 44 31.08 +3.54 8 Bessel ... 341 • • 36.5 49.6 2.5 15.5 6 46 49.56 —4.651 2 18.48 8.191 9 Mars . . . S.F. 30.6 44.3 57.3 10.2 33.5 6 48 57.18 +2.60i 10 Bessel ... 341 49.0 2.0 15.0 27.8 41.0 6 51 14.96 —4.871 —2 17.78 +7.48 AT SANTIAGO DE CHILE. 177 FEBRUARY 21, 1892— Continued. t Chronometer time of transit. Mii>r Planet— Star. Thermometer*. 1 Object. A. B. C. D. E. mier. A a. A 4. Bar. Air. Wet. ,8 i B. s. B. e. a. li. m. s. Rev. 111. S. Rev. Inches. • • 11 Mars . . . S.P. 47.8 1.0 14.0 27.0 40.0 6 54 13.96 +2.37* 27.908 73.8 60.8 12 liosel ... 341 6.0 18.8 31.6 44.5 57.5 6 56 31 .68 —5.10 —2 17.72 +7.471 13 Mars . . . N.P. 35.8 49.0 2.0 15.0 28.0 7 1 1.96 +2.74 Ther. alt 76°. 7 14 Bcssel ... 341 55.2 8.0 21.0 34.0 46.8 7 321.00 —5.39 2 19.04 8.13 Bar. red. to 32° F. 27 . 773 15 Mars . . . N.P. 53.7 6.8 19.8 32.8 46.0 7 5 19.82 +2.63} 16 Bessel ... 341 • • 26.0 52.0 4.8 7 7 38.98 —5.52 2 19.16 8.15J 17 Mara . . . S.F. 16.2 29.3 42.4 55.3 8.4 7 14 42.32 +1.67i 18 { Bessel ... 341 • • 48.0 0.7 13.7 26.6 7 17 0.78 —5.78 3 18.46 7.45J 19 1 Mars . . . N.P. 26.4 39.5 52.5 5.4 . . 7 18 52.41 +2.37} 20 Bessel ... 341 • • 59.0 12.0 25.0 38.0 7 21 12.04 — 5.79J 2 19.63 8.17 31 Mars . . . S.P. 56.7 9.7 22.7 35.7 49.0 7 24 22.76 +1.65 • Bessel ... 341 • • 28.6 41.6 54.6 7.6 7 26 41.63 —5.79 2 18.87 7.44 23 Mars . . . N.P. 28.3 41.8 55.0 7.8 21.0 7 28 54.78 +2.311 24 Bessel ... 341 49.0 1.8 14.8 27.7 40.6 7 31 14.78 —5.87 2 20.00 8.181 25 Mars . . . S.F. 40.0 53.2 6.1 19.1 32.5 733 6.18 +1.561 26 Bessel ... 341 59.5 12.2 25.3 38.0 51.0 7 35 25.20 —5.801 2 19.02 7.37 27 Mars . . . N.P. 54.6 7.6 20.7 33.6 46.6 7 37 20.62 +2.37 28 Bcssel ... 341 27.6 40.7 53.8 6.6 7 39 40.72 —5.831 2 20.10 8.20J 29 Mars . . . S.F. 41.5 54.8 7.8 20.8 34.0 7 43 7.78 +1.69 30 Bessel ... 341 • • 14.3 27.3 40.2 53.0 7 45 27.23 —5.74 2 19.45 7.43 31 Mars . . . N.P. 44.2 57.0 10.2 23.2 36.4 7 47 10.20 +2.42 32 Bessel ... 341 5.0 17.8 30.6 43.6 56.5 7 49 30.70 —5.70 2 30.50 8.12 :r.t Mars . . . S.F. 52.0 4.8 17.8 30.7 43.7 7 51 17.80 +1.76 34 Bessel ... 341 11.5 24.5 37.5 50.4 3.4 7 53 37.46 —5.68 2 19.66 7.44 35 Mars . . . N.P. 8.5 21.6 34.7 47.6 0.6 7 56 34.60 +2.60 36 Bessel ... 341 • • 42.6 55.6 8.5 31.5 7 58 55.58 —5.56 2 20.98 8.16 37 Mars . . . S.F. 23.5 36.5 49.5 2.5 15.7 8 1 49.54 +1.98* 38 Bessel ... 341 56.5 9.5 22.5 35.4 8 4 9.51 —5.50 2 19.97 7.48J 39 Mars . . . N.P. 39.5 52.5 5.6 18.6 31.5 8 6 5.54 +2.74 40 Bessel ... 341 13.5 26.5 39.5 52.5 8 8 26.53 —5.37 220.99 8.11 41 Mars . . . S.F. 0.5 13.7 26.7 39.7 52.7 8 11 26.66 +2.21 42 llessel ... 341 34.0 47.0 59.8 13.0 8 13 46.98 —5.231 220.32 7.441 43 Mare . . . N.P. 23.6 36.3 49.4 2.3 15.4 8 15 49.40 +3.07 44 Bessel ... 341 • • 57.5 10.5 23.4 36.3 8 18 10.46 —5.08 2 21.06 8.15 45 Mars . . . S.F. 54.5 7.5 20.5 33.5 46.5 8 20 20.50 +2 56 46 Bessel ... 341 27.9 41.0 53.7 7.0 8 22 40.93 i *•"" — 4.921 220.43 7.48* 47 Mars . . . N.P. 10.5 . 37.0 49.7 3.0 8 24 36.81 +3.44 37.916 86.3 59.0 48 Bessel ... 341 32.5 45.5 58.5 11.3 24.5 8 26 58.46 —4.75 231.65 8.19 49 Main . . . S.F. 47.6 0.5 13.7 26.6 39.7 8 29 13.62 +2.841 Ther. ntt. 72°. 7 50 Besscl ... 341 21.3 34.6 47.4 0.5 8 31 34.48 — i..>: 220.86 7.43 Bar. rril. to 32" F. 51 Mars . . . N.P. 51.5 4.2 17.5 30.7 43.6 8 33 17.50 +3.70 B7.7W sa Bensel ... 341 • • 26.5 39.5 52.3 5.0 8 35 39.33 —4.45 —2 21.83 +8.15 Remarks. An eitremely fine night. Images sharp and steady, and latiafuctory measures throughout. 23° 178 OPPOSITION OF MAES, 1851-52, FEBRUARY XI, 1853— Continued. Results. h. m. s. m. s. Rev. / // Mean S. F. . . Thirteen transits . . . 7 30 34.10 — 2 18.991 . . . . +7.460 . . . =22i.39 Mean N. P. . . Thirteen transits . . . 7 36 27.76 — 2 20.134 . . . . +8.164 . . . = a 39.12 h. m. m. a. h. m. s. Correction for chronometer at 7 31 . . . —429.12 Santiago sid ... 7 26 4.98 Correction for chronometer at 7 36 . . . —429.13 Santiago sid . . . 7 31 58.63 Interval . ... 5 53.65 II A P. F. limbs in A. R. reduced to arc . . . 17.14 A N. S. liml is micr. in rev. . . . . 0.704 = 13.72 Variation of A. R. in 5m. 54s. . . . ... — 2.44 Variation of declination in 5m 54s. . . + 0.01 Observed P. F. diameter .... . . . 14,70 Corr. for dia m. of micr. wires . . — 2.20 Observed N . S, diameter . . . . . 11.53 h. m. n h. m " A n 0* 7 O7 0 15 A p at 7 33 0.16 FEBRUARY 33, 1853. t Chronometer time of transit. Planet— Star. 'hermo meters. 0 ilean of wires. Micr. »„. I £ M Object. A. B. C. D. E. A a. A I. Air. Wet. a 0 8. s. s. s. h. in. s. Rev. m. s. Rev. Inches. • O Z _ 1 Mars . . . S.F. 36.8 50.0 3.0 15.8 29.3 6 50 2.98 +2.77 27.968 60.7 2 Bessel ... 341 33.0 46.0 59.5 12.5 25.0 6 52 59.20 —3.95 -256.22 +6.72 Ther. alt. 3 Mars . . . N.P. 56.3 9.2 22,5 35.3 48.0 6 55 22.24 +3.33 73°. 4 4 Bessel ... 341 53.5 6.5 19.5 32.3 45.2 6 58 19.40 — 4.13J 2 57.16 7.46| Bar- red. to 32° F. 27.846 5 Mare . . . S.F. 55.7 8.6 21.6 31.6 47.6 7 321.62 +2.43 6 Bessel ... 341 52.0 4.8 18.0 44.0 7 6 17.93 — 4.34J 2 56.31 6.771 7 Mare . . . N.P. 18.3 31.5 44.5 57.2 10.3 7 9 44.36 +4.29 8 Bessel ... 341 15.5 28.6 41.5 54.5 7.5 7 12 41.52 — 3.22J 2 57.16 7.51^ 9 Mars . . . S.F. 43.3 56.4 9.3 22.3 35.5 7 16 9.36 +3.48 10 Bessel ... 341 39.6 52.8 6.0 19.0 32.3 7 19 5.94 — 3.29J 2 56.58 6.77J 11 Mars . . . N.P. 2.5 15.7 28.5 41.7 55.0 7 21 28.68 +4.09 12 Bessel ... 341 0.2 13.5 26.5 39.5 52.5 7 24 26.44 —3.36 2 57.76 7.45 13 Mars . . . B.F. 10.8 23.6 35.5 49.3 2.3 7 26 36.50 +3.39 14 Bessel ... 341 7.0 20.0 33.1 46.1 59.5 7 29 33.14 —3.45 2 56.64 6.84 15 Mars . . . N.P. 39.8 53.1 6.2 19.0 32.0 7 31 6.02 +4.07 16 Bessel ... 341 38.0 51.0 4.0 17.0 30.0 7 34 4.00 — 3.39J —2 57.98 +7.46i Remarks. So blurred and unsteady all the evening, that the measures are little better than guesses. Results. h. m. H. m. s. Rev. ( // Mean S. F. . . Four transits . . . 7 9 2.61 — 256.437 .... +6.777 . . . =2 12.08 Mean N. P. . . Four transits . . . 7 14 25.32 -257.515 .... +7.474 . . . =2 25.67 h. m. m. s. h. in. s. Correction for chronometer at 7 9 . . . — 4 32.67 7 4 29.94 Correction for chronometer at 7 14 . . , — 4 32.68 Santiago sid time N. P. . . 7 9 52.64 5 22.70 it u A P. F. limbs in A. R. reduced to arc . . 16.17 AN. S. limbs micr. in rev . 0.697 = 13.58 Variation of A. R. in 5m. 23« . — 2.04 Variation of declination in 5m. 23s. . + 0.07 Observed P. F. diameter 14.13 Corr. fordiam. of mier. wires . . — 2.20 11.45 h. m. // h. m. H A p at 7 6 . . 0.13 , 0.15 AT SANTIAGO DE CHILE. 179 FEBRUARY 23, 1853. i Chronometer time of transit. Micr. Planet— Star. Rap hermomeleri. 1 Object. A. B. C. D. E. A a. A a. oar. Air. Wet. i <£ 0 6. 8. B. 8. s. b. m. s. Rev. m. B. Rev. Inches. « ' « 1 Mars . . . S.F. 12.8 29.9 38.8 51.6 5.0 5 57 38.82 +2.07 27.964 63.3 60.4 a Bessel ... 311 . . 8 5 21.0 33.8 6 1 8.10 — 3.66J —3 29.28 +5.731 Ther. alt 3 Mars . . . N.P. 33.4 51.5 4 5 17.5 30.5 6 4 4.48 +2.14 71°. 0 4 Bcssel ... 341 8.5 21.5 3-1.6 47.5 0.5 6 7 34.52 —4.06 3 30.04 6.20 Bar. red. to 32° F. 27.648 5 Mars . . . S.F. 38.0 51.0 4.2 17.0 30.3 6 10 4.10 +1.091 6 Bcssel ... 341 8.0 20.5 34.0 47.0 59.5 6 14 33.80 —4.54 3 29.70 5.631 7 Mars . . . N.P. 27.4 40.6 53.7 6.6 19.5 6 15 53.56 +1.24 s Ik-ss.-l ... 341 58.5 11.3 24.3 37.3 50 1 6 19 24.30 —5.02 3 30.74 6.26 1 Mars . . . S.F. 38.5 51.5 4.5 17.4 30.7 6 22 4.52 +1.431 10 Besael ... 341 8.5 21.5 34.5 47.4 0.3 6 25 34.44 — 4.161 3 29.92 5.60 11 Mara . . . N.P. 28.9 42.0 Sfl.O 7.8 21.0 6 27 54.94 +1.79 12 Bessel ... 341 0.0 13.0 25.8 51.7 6 31 25.86 — 4.41 3 30.92 6.20 13 Mare . . . S.F. 39.6 52.7 5.7 18.7 31.7 6 36 5.68 +0.69J M Bessel . . .341 10.0 23.0 36 0 48.8 1.6 6 39 35.88 —4.894 3 30.20 5.59 15 a Mars . . . N.P. 13.3 26.8 40.0 53.0 5.5 6 41 39.72 +1.181 16 Bessc! ... 3^1 45.5 58.4 11.3 24.0 37.0 6 45 11.24 —5.03 3 31.52 6.211 ' 17 a Mars . . . S.F. 5.1.7 6.8 19.8 32.7 46.0 948 19.80 +0.34 18 Bessel ... 341 24.5 37.5 50.5 3.0 16.3 6 51 50.36 —5.24 3 30.56 5.58 )9a M;irs . . . N.P. 18.5 31.5 44.5 57.5 10.6 6 59 44.52 +0.701 SO Bcssel ... 341 • • 3.5 16.5 29.4 42.4 7 3 16.47 —5.56 3 31.95 6.261 21 Mars . . . S.F. 20.5 33.3 46.3 59.3 12.3 7 11 46.34 +2.76 22 Bcssel ... 341 • • 4.5 17.5 30.5 43.5 7 15 17.52 — 2.80^ 3 31.18 5.581 23 Mars . . . N.P. 31.5 44.6 57.6 10.5 23.5 7 17 57.54 +3.36 24 llrss.'l ... 341 4.1 17.0 30.0 43.0 55.6 7 21 29.94 —2.88 332.40 6.24 25 Mars . . . S.F. 3.5 16.6 29.7 43.6 56.0 7 23 29.68 +2.63J 26 Bivsi'l ... 341 35.5 48.0 1.0 14.0 26. 8 7 27 1.06 —2.91 3 31.38 5.541 27 Mars . . . N.P. 42.5 55.3 8.3 21.3 34.5 7 29 8.38 +3.34J 28 Bessel ... 341 15.0 28.0 41.0 53.8 6.6 7 32 40.88 — S. 88 3 32.50 6.221 29 Mars . . . S.F. 26.5 39.5 52.5 5.0 18.5 7 34 52.40 +2.651 30 Bessel ... 341 58.0 11.0 24.0 37.0 50.0 7 38 24.00 —2.891 3 31.60 5.55 31 Mars . . . N.P. 54.2 7.0 20.3 33.2 46.3 7 40 20.20 +3.35 32 il.'-sr! ... 341 26.8 39.8 53.0 5.8 18.8 7 43 52.84 —2.871 3 32.64 6.221 33 Mars . . . S.F. 45.5 58.5 11.5 24.5 37.5 7 46 11.50 +8.70 34 Bessel ... 341 17.5 30.5 43.5 9.5 7 49 43.48 —a. 781 3 31.98 5.481 x, Mars . . . N.P. 50.0 3.0 16.1 29.0 42.3 7 52 16.08 +3.471 36 Bessel ... 341 36.0 49.0 2.0 15.0 7 55 49.02 —2.64 3 32.94 6.111 37 Mars . . . S.F. 22.5 35.3 48.5 1.4 14.5 7 57 48.44 +2.971 38 Bessel ... 341 55.0 7.5 20.5 33.6 46.5 8 1 20.62 —2.52 3 32 18 5.491 39 Mars . . . N.P. 33.5 46.5 59.5 12.5 25.5 8 2 59.50 +3.801 40 Bessel ... 341 6.8 19.7 32.8 59.0 8 6 32.81 —2.39 3 33.31 6.19] 27.962 58.3 57.0 41 Mars . . . S.F. 10.3 23.4 36.5 49.5 2.5 8 8 36.44 +3.251 42 Bcsscl ... 341 . . 56.0 9.0 22.0 35.0 8 12 9.02 -2.181 3 32.56 5.44 Th«. lilt 07'. 7 Bar. red. 43 M:ir,i . . . N.P. 23.5 33.5 48.7 1.6 14.7 8 13 48.60 +4.101 loM'F. 44 Br-ssH ... 341 56.5 9.2 22.3 35.3 48.3 8 17 -1.99 -333.72 +6.091 irTm 180 OPPOSITION OF MARS, 1851-52, FEBRUARY 23, 1858— Continued. Remarks. Quite sharp and steady from the commencement ; but my eyes are actually wearied out with writing and observing, a Such an outrageous clattering of the church bells that it is enough to make a Saint nervous. Mean S. F. . . Eleven transits . . Mean N.P. . . Eleven transits . . h. m. h. m. s. . 7 5 10.70 . 7 11 26.14 m. s. 4 36 36 Results. m. H. Rev. — 3 30.960 .... +5.565 . . — 3 32.062 .... +6.203 . . . . =1 48.46 . . =2 0.90 h. m. s. 7 0 34.34 4 36 38 7 6 49.76 6 15.42 A P. F. limbs in A. R. reduced to arc . . 16.53 . . — 2.15 A N. S. limbs micr. in rev Variation of declination in 6m. 15s. . . 0.638=12.44 + 0.13 . . 14.38 Corr. for diam. of micr. wires . . . — 2.20 h. m. A o at 7 2 it . 0.11 Observed N. S. diameter .... h. m. A p at 7 9 10.37 // 0.12 FEBRUARY 24, 1853. V Chronometer time of transit. Planet— Star. Thermometers. e Mean of wire Micr. Bar. 1 Object. A. B. C. D. E. A a. A ,5. Air. Wet. -s 0 s. 8. 8. 8. s. h. in. s. Rev. m. s. Rev. Inches. ° " f. 1 Mars . . . S.F. 38.8 52.0 5.0 18.0 31.2 5 56 5.00 —3.411 27.960 65.8 60.5 2 Brssel ... 341 t . 52.5 5.5 18.5 31.5 6 0 5.50 7.30$ —4 0.50 +3.79 Thcr. att. 3 Mars . . . N.P. 47.0 0.1 13.2 26.2 39.3 6 2 13.16 3.13J 73°. 2 Bar. red. 4 Bessel ... 341 48.6 f 15.0 27.5 6 6 14.68 7.69 4 1.52 4.55$ to 32° F. 27.838 5 Mars . . . S.F. 32.2 45.3 58.2 11.2 24.3 6 8 58.24 3.46 6 Bessel ... 341 46.3 59.0 12.0 24.8 6 12 59.04 7.26 4 0.80 3.80 7 Mars . . . N.P. 32.2 45.1 58.2 11.0 24.3 6 15 58.16 3.15 8 Bessel ... 341 34.0 47.0 0.0 13.0 26.0 6 20 0.00 7.61$ 4 1.84 4.46$ 9 Mars . . . P.P. 49.5 3.2 16.0 29.0 42.4 6 22 16.02 4.27 10 Bessel ... 341 4.6 17.5 30.5 43.4 6 26 17.50 8.01 4 1.48 3.74 11 Mars . . . N.P. 41.2 54.3 7.5 20.5 33.5 6 29 7.40 1.82 12 Bessel ... 341 • • 56.5 9.7 22.6 35.5 6 33 9.58 6.24$ 4 2.18 4.42$ 13 Mars , . . S.F. 2.3 15.3 28.2 41.3 54.3 6 35 28.28 2.91 14 Bessel ... 341 16.5 29.5 42.5 55.5 6 39 29.50 6.64 4 1.22 3.73 15 Mars . . . N.P. 59 6 13.0 26.5 39.3 52.1 6 42 26.10 2.50$ 16 Bessel ... 341 16.0 29.0 41.8 54.7 6 46 28.88 6.95 4 2.78 4.44$ 17 Mars . . . S.F. 10.3 23.5 36.4 49.3 2.5 6 49 36.40 3.71 18 Ressel ... 341 12.5 35.4 38.5 51.2 4.5 6 53 38.42 7.38$ 4 2.02 3.67$ 19 Mars . . . N.P. 6.5 19.3 32.0 45.0 58.0 6 55 32.16 3.44 20 Bessel ... 341 8.7 31.7 35.0 48.0 1.0 6 59 34.88 7.81$ 4 2.72 4.40$ 21 Mars . . . S.F. 19.6 33.0 46.0 58.8 12.0 7 2 45.88 1.62$ 32 Bessel ... 341 30.3 48.1 1.0 14.0 7 648.10 5.38 4 2.22 3.73} 23 Mars . . . N.P. 16.6 89.5 4-2.6 55.5 8.5 7 8 42.54 l.Mj 24 Bessel ... 341 19.8 32.5 45.5 58.5 11.5 7 12 45.56 —5.42$ —4 3.02 + 4.38 AT SANTIAGO DE CHILE. 181 FEBRUARY 24, 1 ^ V» < ,,i,tinm ,1. V o • Chronometer time of transit. nean of wirfs. M Planet— Star. Rnr hermometers. 1 Object. A. B. C. D. E. raicr. A a. A<5. DOT. Air. Wet. <2 4 8. e. s. 8. s. h. m. s. Rev. m. s. Rev. Inches. • o z 25 Mars . . . S.F. 13.3 26.4 39.5 52.4 5.5 7 14 39.42 —1.85 27.965 61.3 57.7 26 Kernel ... 341 29.0 42.0 55.0 7.7 7 18 41.94 5.57} —4 2.52 +3.721 Ther. an. 27 Mars . . . N.P. 15.5 28.5 41.6 54.5 7.5 7 20 41.52 1.21 70°. 0 28 Bessel ... 341 32.0 45.0 58.0 10.6 7 24 44.90 5.57} 4 3.38 4.M) Bar. red. lo 3-2° F. 27.852 29 Mars , . . S.F. 36.3 49.5 2.5 15.5 28.5 7 27 2.46 1.87 30 Bessel ... 341 53.0 5.0 18.0 31.2 7 31 5.06 5.561 4 3.60 3.69} 31 Mars . . . N.P. 42.0 54.3 7.3 20.3 33.5 7 33 7.48 l.lty 32 Bessel . . 341 58.5 11.5 34.3 37.5 7 37 11.46 5.57 4 3.98 4.38} 33 Mara . . . S.F. 47.0 0.0 13.2 26.0 39.5 7 39 13.14 1.81} 34 Besst-1 ... 341 . • 3.5 16.3 29.3 42.2 7 43 16.34 5.48 4 3.20 3.66} ar> Mars . . . N.I'. 53.5 5.3 18.2 31.1 44.0 7 45 18.22 3.95 36 Bessel . . 341 56.0 9.3 22.3 35.0 48 0 7 49 22.12 7.31} 4 3.90 4.36{ 37 Mars . . . S.F. 40.2 52.5 5.6 18.5 32.0 7 52 5.76 3.78 38 Bessel ... 341 43.0 56.0 9.0 22.0 35.0 7 56 9.00 7.44} 4 3.24 3.66} 39 Mars . . . N.P. 50.0 2.5 15.5 28.5 41.5 7 58 15.60 3.96 40 Bessel ... 341 54.0 7.0 30.0 32.8 45.8 8 2 19.92 7.30 4 4.32 4.34 41 Mars . . . S.F. 33.2 46.3 59.3 12.2 25.5 8 4 59.30 3.47} 42 Bessel ... 341 49.8 3.0 15.8 28.5 8 9 2.80 7.10 4 3.50 3.62} 43 Mars . . . N.P. 22.5 35.5 48.5 1.5 14.6 8 10 48.52 2.62} 44 Bessel ... 341 •40.3 53.0 6.0 19.0 8 14 53.10 —6.91 —4 4.58 +4.88} Remarks. Clean images and steady j ancl the measures generally are ve.y fair. Those towards the last, for about an hour, were the mo«t satisfactory. Results. Mean S. F. . . Eleven transits . Mean N. P. . . Eleven transits . . b. m. s. ,.71 11.81 . 7 11 28.26 m. s. Rev. — 4 2.118 .... +3.713 -4 3.111 .... +4.401 / " . . . = 1 12.37 , . . = 1 25.78 h. m. Correction for chronometer at 7 1 . , Correction for chronometer at 7 11 . A P. F. limbs in A. R. reduced to arc Variation of A. R. in 10m. 16s. . . Observed P. F. diameter . . . m. ». . —439.67 , . — 4 39.70 it . . . 14.89 . . . — 3.15 . . . 11.74 Santiago sid. time S. F h. m. B. . . 6 56 32.14 . . 76 48.56 . . 10 16.43 A N. S. limbs micr. in rev. . . . Variation of declination in 10m. 16». Corr. for diam. of micr. wires . . Observed N. 8. diameter . . . n . 0.688=13.41 + 0.28 — 2.90 11.49 h m. A D at 6 59 . 0.08 h. til. A p at 7 9 it . . . . 0.0 182 OPPOSITION OF MARS, 1851-52, FEBRUARY 25, 1853. V 6) • Chronometer time of transit. Micr. Planet— Star. !' ir Thermometers. l| Object. A. B. C. D. E. A a. AS. ur. nit. 7(1" ^ 44 Mars . . . N.P. 29.7 42.6 55.8 8.6 21.7 8 7 55.68 —4.901 3 25.26 6.451 > >' ,O Bar. red. to 32° F. 45 Bessel ... 341 30.0 42.8 5G.O 9.0 22.0 8 9 55.96 +1.751 27.8S6 46 Mars . . . S.F. 56.2 9.1 23.2 35.1 48.0 8 13 22.12 —5.38 +3 26.16 —7.131 AT SANTIAGO DE CHILE. 183 FEBRUARY »5, 1858— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. AJ. Air. Wet. s. «. 8. B. 8. h. ni. B. Rev. m. 8. Rev. Inches. • • 47 48 Bessel ... 341 Mars . . . N.P. 52.5 17.7 5.5 30.7 18.6 43.7 31.5 56.5 44.5 9.7 8 15 18.52 8 18 43.66 +1.95 —4.48J +3 25.14 -6.43} 28.000 83.4 59.5 Remarks. Fine night. Well defined and steady images, and very fair measures throughout. The comparing star is double, its companion being a 12th— blue ; south 19"; and following 0.4s. Results. h. m. f. m. 8. Rev. / H Mean S. F. . . Twelve transits . . . 7 11 2.03 + 327.612 .... —7.002 ... =2 16.47 Mean N. P. . . Twelve transits . . . 7 16 34.60 + 326.516 .... —6.335 . . . = » 3.47 h. m. m. R. h. in. a. Correction for chronometer at 7 11 . . . —4 43.13 Correction for chronometer at 7 17 . . . —4 43.14 . . . 7 11 51 46 A P. F. limbs in A. R. reduced to arc . . . 16.44 A N. 8. limbs mic. in rev. . . . . . 0.667 = 13.00 Variation of A. R. in 5m. 33s. . . . ... — 1.51 Variation of declination in 5m. 33s. . . + 0.18 Observed P. F. diameter .... . . . 14.93 Corr. for diam. of micr. wires . . . . — 2.90 Observed N. S. diameter . . . . . 10.98 h. m. // h. m. H . 0. A p at 7 9 . 0.12 FEBRUARY 86, 1853. • fi Chronometer time of tiansit. Planet— Star. Thermometers. £ Mean of wires. Micr. Bar. & £ Object. A. B. C. D. E. A a. AJ. Air. Wet. S 6 B. g s s. s. h. m a. Rev. m. s. Rev. inches. « . Z 1 Bessel ... 341 41.2 54.2 7.4 20.4 33.0 6 9 7.2 +4.90 27.920 62.9 2 Mara . . . S.F. 45.5 58.5 11.5 24.5 37.7 6 12 11.54 — 4.91} +3 4.30 —9.81} Ther. att. 3 Bessel ... 341 1.5 14.3 27.5 40.3 53.2 6 14 27.36 +4.64 76° 1. 4 Mars . . . N.P. 4.5 17.5 30.5 43.5 56.5 6 17 30.50 —4.48} 3 3.14 9.19} Bar. red. to32°F. 27.790 5 Bessel ... 311 7.0 20.0 33.3 46.0 59.0 6 19 33.04 +4.35 6 Mars . . . S.F. 11.0 24.2 37.3 50.3 3.4 6 22 37.24 —5.46} 3 4. SO 9.81J 7 Bessel . . 341 27.4 40.4 53.5 6.5 19.3 6 24 53.42 +411 8 Mars . . . N.P. 30.5 43.5 56.5 9.3 22.5 6 27 56.46 -4.991 3 3.04 9.10} 9 Bessel ... 341 4.5 17.5 30.6 43.5 56.5 6 30 30.52 +3.90 10 Mars . . . S.F. 8.5 31.5 34.5 47.5 0.5 6 33 34.50 . — 5.93} 3 3.98 9.83} 11 Besscl ... 341 17.0 30.0 43.2 56.1 9.0 6 35 43.06 +3.72 12 Mara . . . N.P. 20.3 33.1 46.2 59.0 12.0 6 38 46.12 —5.43 3 3.06 9.15 13 Bessel . . . 341 2S.5 35.5 48.5 1.5 14.5 6 41 48.50 +3.564 14 Mars . . . 8.F. 26.1 39.1 52.1 5.1 18.2 6 44 52.12 -6.27 3 3.62 9.83} 15 Bessel ... 341 19.5 32.5 45.5 58.5 11.5 6 47 45.50 +3.30 16 Mars . . . N.P. 22.2 35.3 48.3 1.3 14.2 6 50 48.26 —5.88 3 2.76 9.18 17 Bessel ... 341 47.3 0.2 13.4 26.4 39.3 6 54 13.32 +3.17 18 Mars . . . S.F. 50.5 3.5 16.5 39.7 43.0 6 57 16.64 —6.70 +3 3.33 -9.87 184 OPPOSITION OF MARS, 3851-52, FEBRUARY 36, 1853— Continued. 1 Chronometer time of transit. Micr. Planet— Star. Thermometers. I • Object. A. B. C. D. E. A a. A<5. Air. Wet. ,£ 0 s. s. s. s. s. b. m. s. Rev. m. s. Rev. Inches. 0 0 f. 19 Bessel ... 341 8.2 21.3 34.3 47.2 0.0 6 59 34.20 +3.084 27.886 68.0 60.1 20 Mars . . . N.P. 10.5 23.5 36.5 49.5 2.6 7 2 36.52 —6.094 +3 2.32 —9.18 TliPr. all. 21 Bessel ... 341 8.5 22.0 35.0 48.0 1.0 7 4 34.90 +3.024 72° .5 22 Mars . . . S.F. 11.9 25.1 28.2 51.0 4.4 7 7 28.12 —6.87 3 3.22 9.894 Bar. red. to 32° F. 27.766 23 Bessel ... 341 24.5 38.0 51.0 4.0 16.5 7 10 50.80 +2.95 24 Mars ... 27.3 40.2 53.2 6.3 19.3 7 13 53.26 —6.234 3 2.46 9.184 25 Bessel ... 341 33.5 46.5 . . 12.5 25.5 7 16 59.50 +2.924 26 Mars . . . S.F. 36.0 49.5 2.5 15.5 28.6 7 20 2.42 —6.984 3 2.92 9.91 27 Bessel ... 341 29.0 42.3 55.3 8.1 21.0 7 22 55.14 +2.36 28 Mars . . . N.P. 31.0 44.2 57.2 10.1 23.3 7 25 57.16 —6.93 3 2.02 9.29 29 Bessel ... 341 59.0 12.0 25.2 38.2 51.0 7 28 25.08 +4.10 30 Mars . . . S.F. 1.7 15.0 28.0 41.0 54.0 7 31 27.94 —5.86 3 2.86 9.96 31 Bessel ... 341 27.0 40.0 53.0 6.0 19.0 7 33 53.00 +4.184 32 Mars . . . N.P. 28.8 41.8 54.8 7.8 20.7 7 36 54.78 —5.07 3 1.78 9.254 33 Bessel ... 341 41.0 54.3 7.2 20.3 33.3 7 39 7.-J2 +4.274 34 Mars . . . S.F. 43.5 56.5 9.8 22.7 36.0 7 42 9.70 —5.754 3 2.48 10.03 35 Bessel ... 341 7.5 20.5 33.5 46.5 59.6 7 45 33.52 +4.30 36 Mara . . . N.P. 9.0 22.0 35.2 48.0 1.0 7 48 35.04 —5.00 3 1.52 9.30 37 Bessel ... 341 , . 15.5 28.3 41.5 54.5 7 50 28.44 +4.46 38 Mare . . . S.P. 4.5 17.7 31.0 43.9 56.6 7 53 30.74 —5.51 3 2.30 9.97 39 Bessel ... 341 51.5 4.2 17.4 30.3 43.1 7 56 17.30 +4.62 40 Mars . . . N.P. 52.5 5.5 18.5 31.5 44.5 7 59 18.50 ^1.76 3 1.20 9.38 41 Bessel ... 341 2.0 15.1 28.0 41.0 54.0 8 1 28.02 +4.74 42 Mars . . . S.F. 4.0 17.0 30.2 43.3 56.5 8 4 30.20 —5.234 3 2.18 9.974 43 Bessel ... 341 52.5 5.5 18.5 31.5 44.5 8 7 18.50 +4.944 44 Mars . . . N.P. 54.0 7.0 20.1 32.9 46.0 8 10 20.00 —4.41 3 1.50 9.354 45 Bessel ... 341 38.5 51.3 4.3 17.4 30.4 8 13 4.38 +5.104 46 Mare . . . S.F. • • 6.5 19.5 32.4 8 16 6.48 —4.954 3 2.10 10.06 47 Bessel ... 341 8.6 21.6 34.5 47.6 0.4 8 18 34.54 +5.33 48 Mare . . . N.P. 9.5 22.6 35.6 48.6 1.5 8 21 35.56 —4.03 +3 1.02 —9 36 Remarks. No finer night, better images, or more satisfactory work since the commencement of the series. The atmosphere is as steady as the earth itself. So clear is it, that not only is the companion seen distinctly under full illumination, but even its blue color is perceptible. Results. Mean S. F. . . Twelve transits . . . Mean N. P. . . Twelve transits . . . h. m. s. 7 13 48.47 7 19 31.01 m. e. Rev. + 3 3.123 . . . —9.915 . + 3 2.152 ... —9.239 i n . . =3 13.24 . . =3 0.06 h. m. Correction for chronometer at 7 14 . . . Correction for chronometer at 7 20 . . . m. s. — 4 47.00 — 4 47.01 n Santiago sid. time S. F Santiago sid. time N. P. . . -. . h. m. s. . . 7 9 1.47 . . 7 14 44.00 5 42.53 // A P. F. limbs in A. R. reduced to arc . . Variation of A. R. in 5m. 43s Observed P. F. diameter .... 14.56 — 1.35 13.21 A N. S. limbs micr. in rev. . . Variation of declination in 5m. 43s. . Corr. for diam. of micr. wires . . Observed N. S. diameter . . . . 0.676 = 13.17 + 0.24 — 2.20 11.21 h. m. A pat 7 8 H . 0.20 h. m. A a at 7 13 n . 0.18 AT SANTIAGO DE CHILE. 193 MARCH •;. 185S— Continued. No. for reference. Object. Chronometer time of uansit. Wean of wires Micr. Planet— Star. Bar. hcrmometers. A. B. C. D. £. A a. Ad. Air. Wi-t. 8. s. s. e. s. ll. III. 8. Rev. in. ». Rev. Inches. 0 | 93 94 95 98 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 130 Bessel ... 341 Mars . . . S.F. Besscl ... 341 — S.28 7.76J 3.23J 7.05 3.21J 7.76 3.18 7.08 3.13 7.65 3.07 6.96 3.09 7.58 3.03 6.93i 2.!!!'; 7.52 2.90 6.80 2.88 7.40 3.86 6.771 2.78t 7.34 2.79 —6.71 . . . — 4.48J 3.81} 4.54J 3.90 4.52 3.89 4.49 3.901, 4.52( 3.90 4.52 3.9H 4.551 . -3.92 27.897 Ther. alt. 7(r.:i Bar. ri-d. 10 32° F. 27.774 66.3 60.7 • • 23.5 • • • • 7 52 23.48 32.5 7 53 32.48 Bessel ... 341 Mars . . . S.F. Besscl ... 34! Mars . . . N.P. Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars N P • ' • • 16.8 7 55 16.78 41.5 7 56 41.48 • • 31.5 7 59 31.48 • • • • 54.3 • • 8 0 54.28 • • • • 14.3 • • • • 8 2 14.28 26.5 8 3 26.48 llessi-1 ... 341 47 0 8 4 46.98 Bessel ... 341 36 3 8 7 36.28 Bessel ... 341 44.4 8 8 44.38 Bessel ... 341 1.5 8 10 1.48 Bcs-id ... 341 Mars . . . S.F. Bessel . . . 341 Mars . . . N.P. - • • • 23.5 • • • • 8 11 23.48 • ' • • 43.0 • • • • 8 13 43.98 Remarks. fine night. Sharp and steady images, and satisfactory measures throughout. Mean S. F. Mean N. P. Thirty transits Thirty transits li. tn. Correction for chronometer at 7 19 Correction for chronometer at 7 21 h. m. A f> at 7 14 . A pat 7 16 . Results. h. m. s. 7 19 20.57 7 20 51.32 m. a. — 5 1.78 — 5 1.78 0.09 0.07 25 Rev. — 4.381 — 3.727 25.39 12.64 h. m. s. Santiago sid. time S. F 7 14 I8-79 Hamiazo sid. time N. P 71549.54 ,„„,,, I 1».7S // A N. B. limbs micr. in rev 0.654 = 12.75 Variation of declination in 1m. 3U. . . + 0.11 Corr. for diam. ofmicr. wires .... Observed N. S. diameter 10.68 194 OPPOSITION OF MARS, 1851-52, MARCH 3, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet — Star. Bar. Thermometers. A. B. O. D. E. A a. AJ. Air. Wet. 8. s. s. s. s. h. m. s. Rl!V. m. s. Rev. Inches. O • 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 33 33 34 35 36 37 38 39 40 41 43 43 44 45 46 Bessci ... 341 Mare . . . S.P. Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mara . . . S.F. Bessel ... 341 Mars . . . N.P. Bessel ... 341 +4.37 —5.54 +4.25J — 5.11J +3.97J —5.96 +3.88i — 5.43J +3.71 —6.26 +3.59 — 5.69J +3.47 —6.50 +3.30 — 5.93J +2.91! — 7.06J +2.87 —6.49 +2.74 —7.24 +2.60i —6.71 +2.55 —7.48 +2.38 —7.00 +224i -7.741 +2.22J —7.21 +2.16 — 7.96i +2.08 —7.35 +2.10 —8.00 +3.43 —6.00 +1.64 —8.48 +1.67 — 7.8L>{ +1.70 — 8.46J . . . —9.91 9.37 9.93J 9.32 9.97 9.28J 9.97 9.23J 9.98 9.36 9.98 9.3H 10.03 9.38 9.99 ft.w; 10.12} 9.43 10.10 9.48 10.12 9.49J — 10.16i 27.947 Ther. att. 72°. 6 Bar. red. to 32° F. 27.827 68.3 59.6 • • • • 32.0 • • 6 16 31.98 • • • • 42.3 • • ' • • 6 18 42.28 • • 22.5 • • 6 21 22.48 55.3 * 6 23 55.28 23.S 6 28 23.18 Bessel ... 341 Mars N P 12.1 6 30 12.08 Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mare . . . N.P. Bessel ... 341 Mars . . S.F. • • • • 53.5 • • 6 32 53.48 • • 49.0 • • 6 34 48.98 8.0 6 40 7.98 Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . 8 F. • • • • 51.0 • • • • 6 42 50.98 • • • • 13.3 • • • • 6 45 13.28 • • • • 39.0 • • • • 6 47 28.98 28 5 6 50 28.48 Bessel ... 341 Mars . . . N.P 0 0 6 55 59.98 Bessel ... 341 Mars . . . S.F. 38 0 7 0 37.98 Bessel ... 341 Mars . . . N.P. 6 0 7 3 5.98 Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars , . . N.P. • • • • 23.7 • • 7 6 23.68 7 9 4.98 Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P. Bessel . . 341 Mars . . . S.F. • • • • 58.0 • • • • 7 11 57.98 • • • • 55.0 • • 7 13 54.98 • • 40.5 7 25 40.48 • • • • 18.5 • • 7 27 16.48 40.0 • • 7 28 39.98 AT SANTIAGO DE CHILE. 195 MARCH 3, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mi-anol win's. Micr. Planet— Star. Bar. hermometers. A. B. C. D. E. A«. Ad. Air. Wet. 8. s. 8. S. 8. tl. III. 8. Rev. Ill- 8. Rev. Inches. • • 47 4* 49 50 51 a n Bcsscl ... 341 Mars . . . N.P. Bessel ... 341 Mars S.F. +1.86 -7.65 +1.83 — s.ai +1.36J —8.21 . . . —9.51 10.14 —9.57i 27.953 Ther. »tt. 69° .6 Bar. red. to32°F. 27.841 64.0 57.4 • • 25.0 7 31 24.98 11 0 7 34 10.98 Mars ... 341 21.0 7 36 20.98 Remarks. At no time was the planet sharply defined or the star distinct. The latter, on the contrary, was faint, and the necessity of moving the micrometer screw with rapidity, in order to measure both objects near the centre of the field, made the observations unsatisfactory. a After many trials to make the lamps burn, was obliged to desist. Results. h. m. s. Mean S. P. . Thirteen transits . . 6 54 2.46 Mean N. P. . . Thirteen transits , . 6 56 33.84 h. in. m. 8. Correction for chronometer at 6 54 . . —5 5.17 Correction tor chronometer at 6 57 . . . — 5 5.17 A N. S. limbs micr. in rev 0.637 = 12.41 Variation of declination in 2m. 30s. . . + 0.20 Corr. for iliani. of micr. wires — 2.20 Observed N. S. diameter 10.41 Rev. — 10.032 =3 15.52 — 9.395 =3 3.11 b. m. s. Santiago sid. time 8. F 64857.29 Santiago sid. time N.P. 6 51 27.67 Interval 2 30.38 h. m. A f at 6 49 0.90 & f at 6 51 0-19 MARCH 4, 1853. d V C Chronometer time of transit. Planet— Star. Bur. Thermometers. 1 £ Object. A. B. C. D. E. A a. At Air. Wet. S 6 8 s. s. 8. B. h. m. s. Rev. m.i. Rev. Inches. • • Z 1 H. C. . . . 15401 5.0 18.2 31.0 6 31 18.07 —7.35 27.890 69.5 61.9 3 Mars . . . S.F. 7.8 21.0 34.0 47.0 0.0 6 33 33.96 +5.49 +2 15.89 +12.84 Ther. an. 3 H. C. . . . 15401 14.3 27.1 40.0 63587.13 —7.43 75° .2 4 Mars . . . N.P. 15.5 .28.6 41.7 54.5 7.5 6 37 41.56 +5.89 3 14.43 13.32 to 32" F. 27.762 5 H. C. . . . 15401 16.5 29.5 42.5 6 39 29.50 — 7.6?t 6 Mara . . . S.F. 18.5 31.7 44.6 57.6 10.6 6 41 44.60 +5.16 2 15.10 12.781 7 II. C. . . . 15401 56.0 9.0 •21.6 6 47 8.87 —8.25 8 Mars . . . N.P. 56.7 10.5 23.3 36.3 49.5 6 49 23.26 +5.08 2 14.39 13.33 9 H. C. . . . 15401 5.5 18.5 31.5 6 53 18.50 — 8.89J 10 Mars . . . S.F. 8.0 21.2 34.3 47.2 0.2 6 54 34.18 +4.45 2 15.68 12.74J 11 II. C. . . . 15401 56.5 9.5 23.3 6 57 9.43 — S.37 1-3 Marg . . . N.P. 57.5 10.fi 23.6 36.5 49.5 6 59 23.54 +4.99 +2 14.11 + 13.36 196 OPPOSITION OF MARS, 1851—52, MARCH 4, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. n. 0, D. E. A a. A 4. Air. Wet. s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. | » 13 H. C. . . . 15401 42.5 55.4 8.3 7 1 5.1.- 10 —8.44 27.890 69.5 61.9 14 Mars . . . S.F. 44.5 57.5 10.5 23.5 36.6 7 4 10.52 +4.27 +2 15.12 +12.71 15 16 17 H. C. . . . 15401 Mars . . . N.P. H. C. . . . 15401 18.9 18.0 32.5 21.5 31.0 45.5 34.5 44.0 58.5 47.4 11.5 7 7 31.00 7 9 45.38 7 11 34.47 —8.48 +4.85J —8.52 2 14.38 13.331 Ther. att. 75°. 2 Bar. red. to 32° F. 27.762 18 Mars . . . S.P. 23.5 36.5 49.5 2.5 15.6 7 13 49.52 +4.07 2 15.05 12.59 19 H. C. . . . 15401 41.3 54.2 7.5 7 15 54.33 —8.541 20 Mara . . . N.P. 42.5 55.5 8.5 21.6 34.5 7 18 8.5-3 -1-4.72 2 14.19 13.261 31 H. C. . . . 15401 35.3 48.2 1.0 7 21 48.17 —8.49 22 Mara . . . S.F. 37.3 50.3 3.3 16.0 29.5 7 24 3.28 +4.09i 2 15.11 12.581 23 H. C. . . . 15401 32.5 45.5 58.4 7 25 45.47 —8.501 24 Mars . . . N.P. 33.0 46.5 59.5 12.5 25.5 7 37 59.40 +4.74 2 13.93 13.24J 25 H. C. . . . 15401 38.5 51.3 4.5 7 31 51.43 —8.71 26 Mare . . . S.F. 40.2 53.3 6.3 19.3 32.5 7 34 6.32 +3.92 2 14.89 12.63 27 H. C. . . . 15401 37.5 51.0 3.7 7 35 50.73 —8.64 26 Mars . . . N.P. 39.0 52.0 5.0 18.0 31.0 7 38 5.00 +4.53 2 14.27 13.17 29 H. C 15401 3.3 16.0 29.0 7 41 16.10 —8.551 30 Mars . . . S.F. 5.0 18.2 31.2 44.0 56.8 7 43 31.04 +3.981 2 14.94 12.54 _ 31 B.C.. . . 15401 2.0 15.0 28.0 , t 7 45 15.00 —8.43 32 Mars . . . N.P. 3.5 16.5 29.5 42.5 55.5 7 47 29 50 +4.73 2 14.50 13.16 33 H. C. . . . 15401 48.5 0.8 13.5 . 7 49 0.93 —8.261 34 Mars . . . S.F. 49.7 2.6 15.6 28.5 42.0 7 51 15.68 +4.23 2 14.75 12.49J 35 H. C. . . . 15401 44.0 56.5 9.8 7 52 56.77 —8. 16J 36 Mars . . . N.P. 45.0 58.0 11.3 24.1 37.4 7 55 11.16 +5.00 2 14.39 13.161 37 H. C. . . . 15401 34.0 47.2 0.2 t 7 56 47.13 —8.01 38 Mara . . . S F. 36.0 49.0 2.0 15.0 28.3 7 59 2.06 +4.491 2 14.93 12.501 39 40 H. C. . . . 15401 Mars . . . N.P. 44.5 43.5 57.5 56.5 10.5 9.3 23.5 30. 5 8 0 56.43 8 3 10.50 —7.93 +5.18 2 14.07 13.11 27.986 65.8 60.2 41 43 43 H.C. . . . 15401 Mars . . . S.F. H.C. . . . 15401 45.0 42.5 58.3 34.0 56.0 11.1 47.0 9.0 24.0 0.0 37.2 8 4 55.83 8 7 11.12 8 8 47.00 —7.73 +4.71 —7.58 2 15.29 12.44 Ther. att. 73°. 0 Bar. red. to 32° F. 27.864 44 Mars . . . N.P. 48.5 1.5 11.3 27.4 8 11 1.44 +5.47 +2 14.44 + 13.05 Remarks. Night fine, images steady, and measures satisfactory throughout. Results. h. m . ft m. s. Rev. / n Mean S. F. . . Eleven transits . . . 7 22 27 .48 + 2 15.159 . . + 12.624 . . . =4 6.04 Mean N. P. . . Eleven tra .m 'its . . . 7 27 1 .75 + 2 14.282 . . . . + 13.228 . . . =4 17.81 h . m. m. s. h. m . s. Correction for chronometer at 7 22 . . . —5 8 .(17 Santiago sid. time S. P. ... ... 7 17 18.81 Correction for i chronometer at 7 27 . . . —5 8 n S'll)tia"O r 1 time N P 7 21 Si. 07 Interval . . . 4 34.26 „ n A P. F. limbs in A. R. reduced to arc . . 13.15 AN. S. limbs micr. in rev. . . . . . 0.604 = 11.77 Variation of A. R. in 4/n. 34s. 0. UL Variation of <-• .,,.,.., ..... - ; i •)* j_ 0.39 Observed P. F. diameter ... 13. 16 Corr. for diam. of micr. wires .... — 2.20 Observed N. S. diameter S.96 h. m. it h. m. n A pat? 16 0. iil A o at 7 21 n 26 AT SANTIAGO DE CHILE. MARCH 5, 1859. Clouds until planet had passed the meridian. 197 MARCH 6, 1 -r, :. V c Chronometer time of transit. Micr. Planet— Star. u__ riiiTniometere. £ r. alt. 70° .2 16 Mara . . . N.P. 44.4 57.5 10.5 23.5 36.5 7 18 10.48 +9.10 2 8.95 17.15 Bar. red. 17 H.C. . . . 15412 11.3 24.5 37.3 . , 7 20 24.37 — 8.00J 27.841 18 Mars . . . S.F. 8.2 21.2 • • 47.5 0.5 72234.35 +8.42i 2 9.98 16.43 19 H.C. . . . 15412 26.8 38.8 "52.0 f t 7 24 39.20 —8.05 20 Mars . . . N.P. 22.8 35.7 48.5 1.3 14.6 7 26 48.58 +8.96 2 9.38 17.01 21 H.C. . . . 15412 . . 12.5 25.2 38.0 . . 7 29 25.23 — 8.47$ 22 Mars . . . S.F. 8.5 21.8 35.0 47.6 1.0 7 31 34.78 +7.95 2 9.55 16.1-Ji 23 34 H.C. . . . 15412 Mars . . . N.P. 40.8 44.5 53.8 57.5 6.9 10.5 20.0 33.0 7 33 57.50 736 6.90 -8.38 +8.58 2 9.40 16.96 27.967 61.8 55.4 25 H.C. . . . 15412 . , 52.3 5.1 18.2 . 8 18 5.20 —7.13 Ther. att. 26 Mars . . . S.F. 49.3 1.3 15.4 88.2 41.3 8 20 15.10 +8.9H 2 9.99 16.12J Bar. red. to32°F. 27 a H.C. . . . 15412 57.7 11 0 24 0 8 22 10 90 27.862 28 Mars . . . N.P. 53.7 7.0 20.0 33.3 46.1 8 24 30.02 +9.85 +2 9.12 +18.791 Remarks. Never sharp during the evening ; moreover, there was constantly a quick, tremulous motion, different from anything heretofore noted. a Blurred, so as to be indistinct. Results. h. m. s. m. s. Rev. / ;/ Mean S. F. . . . Seven transits . . 7 19 37.25 + 2 9.657 . . . . + 16.455 . . . =5 20.71 Mean N. P. . . . Seven transits . . 7 23 49.17 + 2 9.059 .... +17.077 . . . =533.83 h. m. m. s. h. m. s. Correction for chronometer at 7 19 . . . — 5 17.25 7 14 10 00 Correction for chronometer at 7 24 . . . — 5 17.24 7 18 31 93 4 21.93 „ u A P. F. limbs in A. R. reduced to arc . . . 8.97 A N. S. limbs micr. in rev. . . . . 0.622=12.12 Variation of A. R. in 4m. 22s. . . . . . + 0.43 Variation of declination in 4m. 32t. . + 0.44 Observed P. F. diameter .... 9.40 Corr. for diam. of micr. wires . . — 9.90 Observed N. S. diameter .... 10.36 h. m. » h. m. u A a at 7 13 . 0.32 A a at 7 17 . 0.33 MARCH 8, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet — Star. Bar. Thermometers. A. B. C. D. E. A a. A* Air. Wet. s. s. .. >. I. h. m. s. Rev. ra. s. Rev. Inches. • * 1 II. C. . . . 15412 30.5 43.5 56.4 6 29 43.47 —5.11 I 28.035 63.5 S4.3 2 3 4 Mars . . . S.F. H. C. . . . 15412 Mars . . . N.P. 37.5 50.0 50.5 43.6 3.0 3.5 56.6 16.3 16.5 9.5 29.0 29.6 42.0 6 33 3.52 6 38 56.57 6 41 16.06 +3.79 —5.00 +4.48* +2 20.05 +2 19.49 +8.90 +9.48J Ther. att. 68° .0 llnr. ri'il. to 32° F. n.tae 200 OPPOSITION OF MARS, 1851-52, MARCH 8, 1853— Continued. i Chronometer time of transit. Micr. Planet— Star. Bar. icrmometers. 1 Object. A. B. C. D. E. A a. A I. Air. Wet. 0 s. s. s. 3. s. h. m. s. Rev. m. s. Rev. Inches. • « 5 H. C. . . . 15412 5.3 18.3 31.1 . 6 43 18.23 —5.09 28.035 62.5 54.3 6 Mars . . . S.F. 12.9 26.0 39.0 52.0 5.0 6 45 38.98 +3.72 +2 20.75 +8.81 Ther. att. 7 H. C. . . . 15412 35.8 48.6 1.5 6 47 48.63 —4.75$ 68°. 0 8 Mars . . . N.P. 42.3 55.3 8.5 21.2 34.3 6 50 8.32 +4.62 2 19.69 9.37$ o 33° F. 27.928 9 H.C. . . . 15412 0.8 13.6 26.4 6 53 13.60 —4.92 10 Mars . . . S.F. 8.2 21.4 34.3 47.3 0.5 6 55 34.34 +3.91 2 20.74 8.83 11 H.C. . . . 15412 39.5 52.6 5.4 6 57 52.50 — 5.02 12 Mars . . . N.P. 46.0 59.0 12.1 25.0 38.0 7 0 12.02 +4.41 2 19.52 9.43 13 H.C. . . . 15412 . 27.0 40.0 52.8 7 3 39.93 —5.16 14 Mars . . . S.F. 34.6 47.5 0.5 13.6 26.5 7 6 0.54 +3.60$ 2 20.61 8.76$ 15 H.C. . . . 15412 33.5 46.6 59.5 7 8 46.53 —5.19 16 a Mars . . . N.P. 41.0 53.6 7.0 19.9 33.2 7 11 6.94 +4.18 2 20.41 9.37 17 H.C. . . . 15412 7.2 20.3, 33.6 7 13 20.37 —5.22$ 18 Mars . . . S.F. 15.2 28.3 41.3 54.3 7.5 7 15 41.32 +3.48 2 20.95 8.70$ 19 H.C. . . . 15412 g ( 11.6 24.5 37.4 7 17 24.50 —5.23 20 Mars N P 32.1 45.0 58.0 11.0 7 19 45.04 +4.06 2 20.54 9.29 21 H.C. . . . 15412 38.6 41.5 54.4 7 21 41.50 —5.26 32 Mars . . . S.F. 36.6 49.5 2.5 15.5 28.5 7 24 2.52 +3.33$ 2 21.02 8.59$ 23 H.C. . . . 15412 . 4.3 17.2 30.2 7 26 17.33 —5.24 24 Mars . . . N.P. 11.3 24.4 37.4 50.3 3.2 7 28 37.32 +3.96$ 2 20.09 9.20$ 25 H.C. . . . 15412 . 24.8 37.7 50.7 7 31 37.73 —5.20 36 Mars . . , S.F. 33.2 45.3 58.4 11.1 24.5 7 33 58.30 +3.40$ 2 20.57 8.60$ 27 H.C. . . . 15412 51.5 4.5 17.3 7 36 4.43 —5.15$ 38 Mars . . . N.P. 58.2 11.2 24.5 37.3 50.4 7 38 24.32 +4.04 2 19.89 9.19$ 39 H.C. ... 15412 14.0 37.0 39.9 7 40 26.97 —5.07$ 30 Mars . . . S.F. 21.6 34.6 47.5 0.6 13.6 7 42 47.58 +3.44 2 20.61 8.51$ 31 H.C. . . . 15412 25.0 38.0 50.8 7 44 37.93 —5.00$ 33 Mars . . . N.P. 31.6 44.6 58.0 10.5 23.5 7 46 57.64 +4.12$ 2 19.71 9.13 33 H.C. ... 15412 . 6.5 19.5 33.3 7 49 19.41 —4.94 34 Mars . . . S.F. 14.0 27.0 40.1 53.0 6.3 7 51 40.08 +3.55 2 20.67 8.49 E5 H.C. . . . 15412 17.5 30.3 43.3 7 53 30.37 —4.86 36 Mars . . . N.P 24.5 37.5 50.5 3.5 16.5 7 55 50.50 +4.27 2 20.13 9.13 37 H.C. . . . 15412 50.0 3.0 15.8 . t 7 58 2.93 —4.69 38 Mars . . . S.F. 57.6 10.7 23.7 36.5 49.8 8 0 23.66 +3.75 3 30.73 8.44 39 H.C. . . . 15412 t t 48.4 1.3 14.3 8 2 1.33 —4.55 40 Mars ... N.P 55.5 8.5 21.4 34.4 47.5 8 4 21.46 +4.49 3 30.13 9.04 41 H.C. . . . 15412 1.0 14.0 27.0 8 6 14.00 —4.40 42 Mars ... S.F 9.2 22.5 35.3 48.3 1.3 8 8 35.32 +4.03 i 21.32 8.42 43 H.C. . . . 15412 . . 1.0 14.0 26.8 . 8 10 13.93 -4.25$ 28.017 56.2 51.7 44 Mars ... N.P 8.2 21.0 34.4 47.2 0.2 8 12 34.20 +4.75$ 2 20.27 9.01 Thcr. at 45 H C. . . . 15413 0.8 14.0 26.8 . . 8 14 13.87 —4.09 60°. 0 46 Mars ... S.F 9.0 22.0 35.3 48.2 1.2 8 16 35.14 +4.24 2 21.27 8.33 Bar. rot to 3-2° F 47 H.C. . . 15412 4.6 17.8 30.6 8 18 17.67 —3.91$ 27.946 48 Mars . . . N.P 11.6 34.5 37.5 50.5 4.0 8 20 37.62 +5.03$ +2 19.95 +8.95 AT SANTIAGO DE CHILE. 185 FEBRUARY 27, 1858. i Chronometer time of transit. Micr Plani't— Star. ttnr milometers. i Object. A. B. C. D. E. A a. Ad. nar. Air. Wet. s 6 s. B. s. s. s. h. m. s. Rev. m. s. Rev. nches. • • 1 Bessel ... 341 32.2 45.0 57.5 10.6 7 15 44.84 +6.201 27.856 65.2 60.2 9 Mars . . . S.K. 0.5 13.7 26.7 29.7 53.0 7 18 28.72 —7.241 +2 41 .88 ; —13.45 her. att. 3 ... 341 23.2 35.6 48.7 1.6 14.5 7 20 48.72 +5.821 73". 0 4 Mara . . . N.P. 4.0 17.2 30.3 43.1 56.3 7 23 30.18 —6.781 2 41.46 12.61 tnr. n-il. o 32° F. 27.734 5 Besael . . . 341 23.0 36.0 49.0 2.3 15.3 7 25 49.12 +5.87 6 Mars . . . S.F. 5.2 18.3 31.3 44.3 57.4 7 28 31. :« —7.441 2 42.18 13.311 7 Ressel ... 341 7.7 21.0 33.8 46.9 0.0 7 30 33.88 +5.95 8 Mars . . . N.P. 48.7 i.r. 14.8 27.8 41.0 7 33 14.76 —6.681 2 40.88 12.631 9 Besscl . . . 341 43.0 56.0 9.0 22.0 35.0 7 37 9.00 +5.961 10 Mars . . . S.F. 24.7 37.8 51.0 3.8 17.0 7 39 50.88 —7.311 2 41.86 13.28 11 Bessel ... 341 55.5 8.5 21.5 34.7 47.5 7 42 21 .54 +6.06 12 Mars . . . N.P. 36.5 49.5 2.6 15.5 28.6 7 45 2.54 —6.621 2 41.00 12.681 13 Bessel ... 341 41.8 55.0 8.0 21.0 34.0 7 48 7.96 +6.18 14 Mars . . . S.F. 23.5 36.8 49.8 2.7 16.0 7 50 49.76 -7.171 2 41.80 13.351 15 Bessel ... 341 23.1 36.0 49.0 2.3 15.2 7 52 49.13 +6.251 16 Mars . . . N.P. 3.7 16.7 29.8 42.7 55.6 7 55 29.70 —6.431 2 40.58 12.70 17 Bessel ... 341 28.0 40.5 53.7 6.5 19.6 7 57 53.66 +6.311 18 Mars . . . S.F. 8.5 21.6 34.9 48.0 1.3 8 0 34.86 —7.001 2 41.20 13.32 19 Bessel ... 341 10.5 93.5 36.5 49.5 2.5 8 2 36.50 +6.49 90 Mara . . . N.P. 51.0 4.0 17.0 30.0 43.0 8 5 17.00 —6.231 2 40.50 12.72 21 Bessel . . 341 40.5 53.5 6.5 19.5 33.5 8 7 6.50 +6.651 33 Mars . . . S.F. 21.7 34.6 47.5 0.6 13.6 8 9 47.60 —6.79 2 41.10 13.44 33 Besscl ... 341 17.2 30.3 43.3 56.2 9.0 8 11 43.20 +6.81 34 Mars . . . N P. 57.5 10.5 23.5 36.5 49.5 8 14 23.50 —5.931 2 40.30 12.74 25 Besscl ... 341 22.0 35.0 48.0 1.0 13.8 8 16 47.96 +7.09 26 Mars . . . S.F. 3.0 16.1 29.0 42.0 55.3 8 19 29.08 —6.341 2 41.12 13.431 27 l'.f."i>l ... 341 8.4 21.3 34.5 47.4 0.5 8 21 34.42 +7.31 28 Mars . . . N.P. 48.6 1.5 14.6 27.5 40.5 8 24 14.54 -5.48 3 40.13 12.78 29 Bessel ... 341 48.5 1.0 14.3 27.2 40.2 8 36 14.24 +7.521 30 Mars . . S.F. 29.0 42.2 55.1 8.0 21.3 8 28 55.12 —5.95 2 40.88 13.47 31 Bessel ... 341 12.5 25.6 38.6 51.6 4.5 8 31 38.56 +7.77 33 Mars . . . N.P. 53.0 6.0 18.8 31.7 45.0 8 34 18.90 —5.031 2 40.34 12.80 97.836 63.4 58.4 33 Besscl ... 341 47.1 0.2 13.0 26.5 40.0 8 36 13.36 +8.07 34 Mars . . . S.P. 28.5 41.5 54.5 7.5 20.5 8 38 54.50 —5.431 2 41.14 13.49 Ther. at 71°.2 35 Bessel ... 341 36.5 49.6 2.5 15.5 29.0 8 41 3.62 +8.38 Bar. ret to 32° F 36 Mars . . . N.P. 16.5 29.7 42.8 55.7 8.7 8 43 42.68 —4.47 +2 40.06 -12.85 97.720 Remarks. Same remarks applicable as last night. Immersion of « Tauri, per chronometer, at 64. 50m. 33.. Results. m. s. Rev. / it Mean S. F. Mean N. P. h. m. s. Nine transits . . . 7 59 28.87 . . Nini- transits ... 8 4 4S.20 + 241.463 . + 240.582 . . . —13.397 . , . —12.727 . . . . =421.11 ... =4 8.05 24 186 OPPOSITION OF MARS, 1851-52, FEBRUARY 27, 1853— Continued. Results — Continued. li. m. Correction for chronometer at 7 59 Correction for chronometer at 8 5 in. s. — 4 50.40 — 4 50.41 h. m. s. Santiago sid. time S. F 7 54 38.47 Santiago sid. time N. P 85957.79 Interval 5 19.32 A P. F. limbs in A. R. reduced to arc . . Variation of A. R. in 5m. 19s — 1.01 Observed P. F. diameter 12.19 h. m. A p at 7 52 . A N. S. limbs micr. in rev 0.670 = 13.06 Variation of declination in 5in. 19s. . . + 0.26 Corr. for diam. of micr. wires . ... — 2.20 Observed N. S. diameter 11.12 h. m. " A p at 7 59 0.25 FEBRUARY 28, 1853. OJ Chronometer time of transit. Planet— Star. tiermometers. 1 ean of wires. Micr. Bar. D ! h Object. A. B. C. D. E. A a. AJ. Air. Wet. s 6 s. s. s. s. s. h. m. s. Rev. s. Rev. Inches. „ 0 2 1 essel ... 341 18.5 31.3 . . 6 31 31.37 — 3.58$ 27.911 60.3 59.0 2 Mars . . . S.F. . . 11.5 24.5 38.0 . . 6 32 24.66 +6.73 +53.29 +10.311 Ther. att. 3 essel ... 341 8.3 21.3 6 34 21.27 —3.70 69°. 9 4 Mars . . . N.P. 0.5 13.5 26.0 . . 6 35 13.33 +7.28J 52.06 10.98J Jar. red. to 32° F. 27.799 5 Bessel ... 341 . . 58.0 . . 6 38 57.98 —3.80 6 Mars . . . S.F. 37.8 51.0 4.0 6 39 50.93 +6.42J 52.95 10.221 7 Bessel ... 341 . . 37.0 6 41 36.98 — 3.87J g 17.0 30.2 43.0 6 42 30.07 +7.03 53.09 10.90J 9 Bessel ... 341 59.3 6 45 59.28 -3.97 10 Mars . . . S.F. 39.0 52.0 4.8 6 46 51.93 +6.19i 52.65 10.161 11 Bessel ... 341 . , 20.5 6 49 20.48 — 4.09J 12 Mars . . . N.P. 59.6 12.8 25.8 • • 6 51 12.73 +6.75J 52.25 10.85 13 Bessel ... 341 . . 26.0 . . 6 53 25.98 — 4.30J 14 Mars . . . S.F. • • 6.0 18.8 31.7 • • 6 54 18.83 +5.891 52.85 10.20 15 Bessel ... 341 . . 8.5 . . . . 6 59 8.48 — 4.43J 16 Mars . . . N.P. • • 48.7 1.7 7 0 1.68 +6.371 53.20 10.81 17 Bessel ... 341 , .^ 19.5 . . 7 2 19.48 —4.50 18 Mars . . . 8.P. • • 59.3 12.3 7 3 12.28 +5.70 52.80 10.20 19 Bessel ... 341 43.0 7 4 42.98 — 4.49J 20 Mars ... N.P 22.0 35.0 48.0 7 5 35.00 +6.36 52.02 10.85J 21 Bessel ... 341 19.5 7 9 19.48 —4.501 22 Mars ... S.F • • 59.2 12.5 25.5 7 10 12.40 +5.62£ 52.92 10.13 23 Bessel . . .311 . t 27.0 7 12 26.98 —4.39 24 Mars . . . N.P • • 5.0 18.0 30.8 • • 7 13 17.93 +6.3H 50.95 10.701 25 Bessel ... 341 2.5 . . 7 16 2.48 —4.41 26 Mars ... S.F • • 41.5 54.5 7.5 7 16 54.50 +5.56 52.02 9.97 27 Bessel ... 341 . . 57.5 . . 7 19 57.48 — 4.59J 28 Mars ... N.P • • • • 49.0 1.5 • • 7 20 48.76 +6.24 51.28 10.83S 29 Bessel ... 341 . . . . 57.5 . , 7 59 57.48 —5.12 30 Mars ... S.F 36.8 49.2 2.4 8 0 49.47 +4.89 51.99 10.01 31 Bessel ... 341 6.0 . . 8 3 5.98 5.01; 32 Mars ... N.P 44.5 56.5 9.5 8 3 56'. 83 +5.66 50.85 10.68 33 Bessel ... 341 58.4 8 5 58.38 — 4.27, 34 Mars ... S.F • • 36.5 49,4 2.3 • • 8 6 49.40 +5.71 +51.02 +9.99 AT SANTIAGO DE CHILE. 187 FEBRUARY »8, 1853— Continued. V B C Chronometer time of transit. . Plani't — Star. rix-rnioni. •[•>,. I I Object. rtean of wires Micr. Bar. A. B. C. D. E. A a. Aj. Air. Wet. g 6 2 s. s. s. s. f. h. m. s. Rev. s. Rev. Inches. « • 35 Bessel ... 341 1.5 8 9 1.48 —4.18 27.916 57.5 57.0 36 Mars . . . N.P. 39.0 52.2 5.0 8 9 5-J.07 +6.41 +50 59 +10.59 37 Bessel ... 341 . . • 20.0 , . 8 11 19.98 —4.09 Tlit-r. att. «7°.6 38 Mars . . . S.F. 58.5 11.5 24.4 • • 8 12 11.47 +5.941 51.49 10.031 Har. red. to 32" F. 27.810 39 Bessel ... 341 . . 44.5 . . 8 13 44.48 —3.97 40 Mars . . . N.P. 21.6 34.5 47.5 8 14 34.53 +6.71 50.05 10.68 41 Besscl ... 341 . . 51.2 . . . , 8 16 51.18 —3.83 42 Mars . . . S.F. • • 29.8 42.5 55.6 • • 8 17 42.63 +6.15 51.45 9.98 43 Bessel ... 341 30.0 . 8 20 29.98 —3.68 44 Mars . . . N.P. 7.0 20.0 32.9 8 21 19.97 -J-fi QQ! 49 99 Ufifil 45d Bessel ... 341 2.7 8 23 2.68 TD-aei —3.47 . ni>_. 46 Mars . . . S.F. 41.0 54.3 7.0 8 23 54.10 +6.511 51.42 9.98} 47 Bessel ... 341 . 20.5 . . 8 25 20.48 —3.421 48 Mars . . . N.P. • • 57.5 10.5 23.5 • • 8 26 10.50 +7.24 50.02 10.661 49 Bessel ... 341 18.4 t 8 27 18.38 —3.32 50 Mars . . . S.F. • • 56.6 9.6 22.6 8 28 9.60 +6.701 51.22 10.021 51 Bessel ... 341 21.0 t m 8 29 20.98 —3.21 52 Mars . . . N.P. • • 59.0 12.0 25.0 8 30 12.00 +7.43 +51.02 +10.64 Remarks. Very much blurred and indistinct, so that satisfactory measures cannot be made. a Recorded 20.5s. e Rather sharper; but there was a flickering motion 6 So much blurred, it is not easy to estimate contact. during the remainder of the observations, which prc vented good work. d Recorded 22m. 57. 7«. Results. h. in. s. s. Rev. / */ Mean S. F. . . Seven transits . . . 6 54 49.36 + 52.783 .... +10.172 . . . =3 18.25 Mean N. P. . . Seven transits . . . 6 58 22.79 52.121 .... 10.849 . . . 3 31.45 Mean S. F. . . Six transits . . . . 8 14 56.11 51.432 .... 10.004 . . . 3 14.98 Mean N. P. . . Six transits . . . . 8 17 40.98 + 50.420 .... +10.653 . . . =327.63 h. m. m. s. b. m. m. t. Correction for chronometer at 6 55 . . . — 4 53.51 Correction for chronometer 8 15 . . . . —4 53.69 Correction for chronometer at 6 58 . . —453.51 Correction for chronometer 8 18 . . . . —4 53.69 h. m. s. h. m. s. Santiago «id. time S F 6 49 55.85 8 10 2.43 Santiago sid. time N. P. 6 53 29 28 8 12 47.29 3 33.43 S 44.87 n A P. F. limbs in A. R. reduced to arc . . 9.93 A N. S. limbs micr. in rev. . . . . 0.677=13.19 Variation of A. R. In 3m. 33j . . — 0.59 Variation of declination in 3m. 33t. . + 0.20 Observed P. F. diameter . . 9.34 Corr. for diami'H •< <><. IMI.T. wires — a. 20 Observed N. S. diameter .... 11.19 lt n A P. F. limbs in A. R. reduced to arc . . . 15.18 A N. 8. limbs micr. in rev. . . . . 0.649=12.65 Variation of A. R. in 2m. 45«. ... . . — 0.46 Variation of declination in 2m. 45s. . + 0.15 Observed P. F. diameter . . 14.72 Corr. for dioni. of micr. wires . . . — 2.20 Observed N 8 diiimeter • * . 10 60 ii. m. ri h. m. H A o 'i ' 6 49 0 21 .... 0.19 A A at 6 53 . 0.22 A f at 8 12 . . . 0.31 188 OPPOSITION OF MARS, 1851-52, FEBRUARY HO, 1852. V Chronometer time of transit. Planet— Star. Thermometers. D 5 Micr. Rnr | £ Object. A. B. C. D. E. Aa A,! oar. Air. Wet. £ i -1 s. 8. s. s. s. h. m. s. Rev. s. Kev. Inches. « a 1 Bessel ... 341 . . 1 . . 52.6 B t 6 34 52.58 —3.58 27.961 57.0 55.4 2a Mars . . . S.F. 31.0 44.0 . . 6 35 31.01 +2.36 +38.43 +5.94 Ther. all. 3 Bessel ... 341 . . 10.5 . . 6 37 10.48 —3.77 66°. 4 4 Mars . . . N.P. . . 35.2 48.2 1.0 • . 6 37 48.13 +2.76 37.65 6.53 Bar. red. to 32° F. 27.859 5 Bessel ... 341 . . 22.7 . . 6 40 22.68 —3.85 6 Mars . . . S.F. 1.5 6 41 1.48 4-2 07 38.80 5.92 7 Bessel ... 341 16.5 6 42 16.48 T* "' — 3.88t 8 Mars . . . N.P. 54.0 6 42 53.98 +2,63 37.50 6.51^ 9 Bessel ... 341 14.0 6 44 13.98 —3.92 10 Mais . . . S.F. 52 7 6 44 52.68 4-1 92" 38.70 5.841 11 Bessel ... 341 49.5 6 45 49.48 -f-l .1^5 —4.01 12 Mars . . . N.P. 27 0 6 46 26.98 -f2.58 37.50 6.59 13 Bessel ... 341 29.0 6 51 28.98 -2.77| 14 Mars . . . S.P. 7 5 6 52 7.48 4-3 Ifi1 38 50 5.94 15 Bessel ... 341 21.0 6 53 20.98 "J-O.iUj- —2.75 16 Mars . . . N.P. • • 59.0 • • 6 53 58.98 +3.76J 38.00 6.51i 17 Bessel ... 341 . . 14.0 . , , , 6 54 13.98 — 2.74i 18 Mara . . . s.F. • • • • 52.5 • • • • 6 55 52.48 +3.12J 38.50 5.87 19 Bessel ... 341 , , . 6.3 6 57 6.28 —2.741 30 Mars . . . N.P. . . . . 43.6 . . . . 6 57 43.58 +3.72 37.30 6.46J 21 Bessel ... 341 33 7 6 58 33.68 —2.80 27.960 54.6 22 Mars . . . S.F. . , t f 12.2 6 59 12.18 +3.08J 38.50 5.881 Ther. att. 66°. 3 S3 Bessel ... 341 10 6 7 0 10.58 2_82 Bar. red. Ml Mars . . . N.P. • • 48.5 • • • • 7 0 48.48 +3.71 +37.90 +6.53 to 32° F. 27.858 Remarks. Images blurred and unsteady all the time, and the star often extremely indistinct, owing to thin cirri over the sky. o Recorded 21s. at wire C. i Interrupted by cirri. Mean S. F. . . . Six transits , ii. m. s. . . 6 48 6.23 Results. a. Rev. + 38.572 . . . . + 5.900 . . t 11 . . =1 54.99 h. m. Correction for chronometer at 6 48 . Correction for chronometer at 6 50 . m. s. . . —455.86 . . —455.86 + 37.642 . . . . + 6.524 . . Santiago sid. time S. F . . =2 7.15 h. m. s. . . 6 43 10.37 6 44 54 16 1 43 79 A P. F. limbs in A. R. reduced to are Variation of A. R. in 1m. 44». . . Observed P. F. diameter .... n . . . 13.95 ... — 0.23 . . . 13.72 A N. S. limbs micr. m rev. . . . Variation of declination in 1m. 44>. . Corr. for diam. of micr. wires . . Observed N. S. diameter . . , . // . 0.624 = 12.16 + 0.11 — 2.20 10 07 h. m. A e at 6 43 // . . . . 0.12 h. m. A f at 6 45 . ir . 0.13 AT SANTIAGO DE CHILE. 189 MARCH 1, 1853. No. for reference. Object. Chronometer time of transit. Micr. Planet— Star. Thermometers. A. B. c. D. E. A a. At Air Wet. s. 8. 8. s. B. h. m. s. Rev. 8. liev. hiHn • • 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 30 21 22 23 24 25 26 27 28 29 30 31 33 33 34 35 36 37 38 39c 40 41 42 43 44 45 46 Bessel . . . 341 13.2 6 27 13.18 6 27 40.28 6 28 48.48 6 29 14.58 6 30 28.28 6 30 55.48 6 32 22.58 6 32 48.78 6 33 37.48 6 34 3.48 6 36 33.48 6 37 0.48 6 38 56.48 6 39 23.48 6 40 54.78 6 41 21.18 6 43 6.28 6 43 33.48 6 44 25.48 6 44 51.48 6 46 32.58 6 46 59.78 6 47 57.98 6 48 24.48 6 49 15.56 6 49 42.98 6 50 39.18 6 51 5.48 6 57 33.08 6 57 59.98 6 58 54.18 6 59 20.48 7 0 45.28 7 ] 11.78 7 2 19.48 7 2 45.78 7 7 8.48 7 7 35.48 7 9 11.08 7 9 37.18 7 10 22.28 7 10 48.28 7 11 28.58 7 11 54.58 7 13 15.48 7 13 42.28 +2.07*- 3.07 1.97 3.69 1.90 3.01 1.87 3.62 1.80 3.51* 1.71 2.75 1.61* 2.69 1.58* 3.24* 1.48 2.54 1.45* 3.15 1.38* 2.43 1.35 3.00 1.30 2.35 1.23* 2.93 1.26* 2.22 1.18 2.74* 1.80 3.81 1.74 +2.75 —4.26 3.26 4.21* 2.61 4.94 2. 62 4.29 2.65 4.30 —3.34 +27.10 26.10 27.20 26.20 26.00 27.00 27.00 26.40 27.20 26.00 27.20 26.50 27.40 26.30 26.90 26.30 26.50 26.30 27.00 26.10 96.00 26.00 +26.80 +0.99* 1.72 1.11 1.75 1.71 1.04 1.07 1.66 1.06 1.69* 1.04* 1.65 1.05 1.69* 0.95* 1.56* 1.01 1.01 1.00 1.60* 1.63 1.64 +0.96 28.008 Ther. a 72°2. Bar. re toSa-F 27.889 67.3 59.9 Mars . . . S.F Bessel ... 341 Mars ... N.P Bessel . . . 341 Mara ... S.F Bessel ... 341 Mars . . . N.P Bessel ... 341 Mars . . . N.P Bessel ... 341 Mars . . . S.F • ' 40.3 48 5 • • • • 14.6 28.3 55.5 22.6 • • • • • • • • 48.8 • • . . • ' 3.5 33.5 0.5 . Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P Bessel ... 341 Mars . . . S.F. • • 56.5 23.5 • • • • 21.2 33 5 Bessel ... 341 Mars . . . N.P Bessel ... 341 Mars . . . S.F • • 25.5 51.5 • • • • 59 8 Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P • • • • 58.0 24.5 15.6 43.0 39.2 5 5 • • • • Bessel ... 341 33.1 0 0 Bessel ... 341 Mars . . . N.P. Bessel ... 341 Jars . . . 8.F. Bessel ... 341 i: • • 54.9 20.5 45.3 11.8 • • Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . N.P. • • 35.5 • • • • 37.2 22.3 48.3 28.6 54.6 • • essel ... 341 Mars . . . 8.P. • • 16.5 42.3 190 OPPOSITION OF MARS, 1851-52, MARCH 1, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet — Star. Bar. Thermometers. A. B. C. \ D. E. A o. AS. Air. Wet. s. s. s. s. s. h. m. s. Rev. s. Rev. Inches. • • 47 48 49 50 51 53 53 Bessel ... 341 • • 48.3 14 4 7 14 48.28 7 15 14.38 7 15 59.98 7 16 86.78 7 17^1.28 7 17 57.18 7 18 49.28 —4.36 2.67 4.32 3.34 4.30 2.73 4.29 +26.10 26.80 25.90 +1.69 0.98 1.57 28.012 Tlier. alt. 69°7. Bar. red. to 32° F. 27.900 65.5 59.6 Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . N.P. • • 0.0 26.8 31.3 57.2 • • • • Bessel ... 341 49.3 51 Mars . . . S.F. • • 16.0 • • • • 7 19 15.98 3.36* 26.70 0.92J H Bessel ... 341 B , f f 6.6 . t 7 20 6.58 4.30 56 Mars . . . N.P. • • 32.5 • • • • 7 30 32.48 2.70 25.90 1.60 57 Bessel ... 341 . .' 24.6 t . 7 21 24.58 4.32 58 Mare . . . S.F. • • 51.5 7 21 51.48 3.38 26.90 0 94 59 Bessel ... 341 . . 12.3 7 24 12.28 4.34 60 Mars . . . N.P. • • 38.0 • • 7 24 37.98 2.74 25.70 1.60 61 62 63 64 65 66 67 68 69 Bessel ... 341 Mars . . . S.F. • • • • 29.8 • • 7 25 29.78 7 25 56.48 7 26 43.18 7 27 8.88 7 28 2.98 7 28 29.58 7 29 8.58 7 29 34.48 7 30 16.48 4.32 3.37 4.33 2.75 4.31 3.40 4.31 2.74 4.28 26.70 25.70 26.60 25.90 0.95 1.58 0.91 1.57 Bessel ... 341 Mars . . . N.P • • 43.2 8 9 • • Bessel ... 341 Mars . . . S.F. 3.0 29 6 • • Bessel ... 341 Mars . . . N.P. • • 8.6 34.5 Bessel ... 341 16.5 70 Mars . . . S.F. 43.6 • • 7 30 43.58 3.38i 27.10 0.89J 71 Bessel ... 341 40.8 7 31 40.78 4.28 72 Mara . . . N.P. 6.8 • • 7 32 6.78 2.78J 26.00 1.49J 73 Bessel ... 341 57.8 7 32 57.78 4.331 74 Mars . . . S.F. 24.3 7 33 24.28 3.39 26.50 0.944 75 Mars . . N.P. 57.0 7 33 56.98 4.33 76 Bessel ... 341 • • 24.5 7 34 24.48 —2.75 +27.50 +1.58 Remarks. a Quite sharp and good. /' Blurred and indistinct. c Fine again, and all the remaining observations. Results. h. m. s. m. 8. Rev. / // Mean S. F. . . Nineteen transits . . 7 2 52.60 + 26.889 .... +0.992 . . . . =0 19.33 Mean N.P. . . Nineteen transits . . 7 5 31.93 + 26.137 .... +1.632 . . . . =031.81 h. m. m. s. * h. m. s. Correction for chronometer at 7 3 . . . —4 58.76 Santiago sid. time S F. . . 6 57 53 84 Correction for chronometer at 7 6 . . . —4 58.76 Santiago sid. time N.P ..70 33.17 2 39.33 // 11 A P. F. limbs in A. R. reduced to arc . 11.28 A N. S. limbs mior. in rev. . . . . 0.640 = 12.47 Variation of A. R. in 2m. 39» . — 0.26 Variation of declination in 2m. 39s. . + 0.19 Observed P. F. diameter 11.03 Corr. for diam. of micr. wires . . — 2.20 Observed N. S. diameter .... 10.46 h. m. h. m. „ A p at 6 58 . . 0 09 A p at 7 0 . . 0.03 AT SANTIAGO DE CHILE. 191 MARCH -4. ivv;. 1 £ & 6 2 1 2 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 92 23 24 25 86 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 n 45 46 Chronometer time of transit. >an of wiies. Micr. Planet— Star. Bar. lermometers. Object. A. B. C. D. E. A a. &i. Air. Wet. s. s. s. s. s. n. in. s. Rev. III. S. Rev. Inches. • 0 Bessel ... 341 +1.08 —3.07 +0.95 —2.54 +0.89 —3.27 +0.74 —2.75 +0.761 —3.45 +1 .05 —2.561 +0.78 —3 .-481 +0.651 —2.91 +0.54 —3.701 +0.42 —3.141 2.201 6.641 2.50 6.111 2.541 6.81J 2.86 6.441 2.92J 7.20 2.941 6.60 3.02 7.29 3.091 6.77 3.13 7.40 3.13 6.60 3.12 7.42 3.14J I,.',-, 3.13 — 7.4S . • • —4.15 3.49 4.16 3.49 4.211 3.611 4.M) 3.561 4.241 3.561 4.44 3.611 4.27 3.581 4.271 3.651 4.27 3.671 4.27 3.67 4.30 3.63 -4.99 27.890 Then att. 75°. 5 lar. red. to 32° F. 27.761 71.5 62.7 2.2 6 18 2.18 Bessel . . 341 Mars . . . N.P. Bessel ... 341 Mars . . .S.F. Bessel ... 341 Mars ... N.P. Bessel ... 341 • • • • 37.5 i 6 19 37.48 • • 57.0 • • • • 6 21 56.98 . . 26.3 54.5 • • • • 6 23 26.28 • • • • 6 24 54.48 Bessel ... 341 Mars . . . N.P. Bessel ... 341 • • 21.3 • • 6 27 21.28 37.6 6 30 37.58 Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . S.F. 19.0 • • • • 6 32 18.98 7.5 6 34 7.48 Bessel ... 341 1 3 6 36 1.28 Bessel ... 341 Mars . . . S.F. Bi.-ssc] ... 341 • • • . 28.2 • • 6 44 28.18 51 6 6 46 51.58 Bessel ... 341 Mars . . S.F. Bessel ... 341 Mars . . . N.P Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars ... N.P Bessel ... 341 Mars . . . S.F. lt.-s.-a-l ... 341 Mars ... N.P Bessel ... 341 Mars . . . S.F Bessel ... 341 Mars . . . N P Bessel ... 341 Mars ... S.F H.-si-l ... 341 Mars ... N.P Brssel ... 341 Mars ... S.F • • • • 19.8 • • • • 6 48 19.78 • • • • 57.5 6 49 57.48 • • 50.5 6 51 50.48 " • • • • 11.0 6 53 10.98 • • • • 54.6 • • 6 54 54.58 • • • • 20.0 • • 6 56 19.98 • • 51.0 • • • • 6 57 50.98 13 8 6 59 13.78 • • • • 31.5 • • • • 7 4 31.48 55.3 • . 7 5 55. 2S 30.3 7 7 30.28 192 OPPOSITION OF MARS, 1851-52, MARCH a, 1852-Coiitiniietl. No. for reference. Object. Chronometer time of transit. Merm of wires Micr. Planet— Star. Bar. Thermometers. A. B. c. D. E. A a. A S. Air. Wet. 8. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. • • 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 Bessel ... 341 —3.22 6.87} 3.21} 7.59} 3.26} 6.92 3.24 7.60 3.28} 7.01} 3.33 7.68i 3.36 7.041 3.41} 7.81 3.40 7.18 3.39 7.83} 3.41 7.19} 3.40 7.81 3.4S 7.14} 3.41 7.87} 3.43 7.19} 3.41} 7.85 3.44} 7.21 3.35} 7.79 3.34} 7.15} 3.36 7.79 3.30} 7.12 3.32 7.84 3.30} —7.16 • • • —3.65} 4.38 3.65} 4.36 3.73 4.35} 3.68} 4.39} 3.78 4.44} 3.78} 4.41 3.72} 4.46} 3.76} 4.43} 3.76} 4.43} 3.81 4.43 3.81} 4.52 —3.85} 27.890 Ther. alt. 75". 5 Bar. ml. to 32° F. 27.761 71.5 62.7 38.1 I 7 8 38.08 Bessel ... 341 Mars . . . S.F. Bessel ... 341 • • 31.0 • • 7 11 30.98 59.0 7 12 58.98 Bessel ... 341 31.4 7 14 31.38 Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mare .... S.F. Bessel ... 341 Mars . . N.P. Bessel . . .34] Mara . . . S.F. Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P. Besael ... 341 • • 58.0 • • • • 7 15 57.98 • • • • 14.5 • • 7 17 14.48 • • 14.5 • • 7 19 14.48 • • • • 45.5 • • 7 26 45.48 • • • • 12.5 • • 7 28 19.48 • • • • 21.0 • • 7 29 20.98 • • • • 30.3 • • • • 7 30 30.28 1.5 732 1.48 Bessel ... 341 Mars . . . N.P. Bessel ... 341 • • • • 14.5 • • 7 33 14.48 19.6 7 35 19.58 Ressel ... 341 Mars . . N P 46.3 7 36 46.28 Bessel ... 341 Mars . . . S F. 20.5 7 38 20.48 Bessel ... 341 Mara . . . N.P. Bessel ... 341 Mars . . . S.F • • • • 35.5 • • 7 39 35.48 8.0 7 45 7.98 Bessel ... 341 Mars . . . N.P. 9.5 7 46 9.48 Bessel ... 341 Mars . . . S.F. Bessel ... 341 Mars . . . N.P. Bessel ... 341 Mars . . . S.F. Bessel . . 341 Mars . . . N.P. • • 12.5 • • • • 7 47.12.48 • • 17.0 • • • • 7 48 16.98 • • • • 25.7 • • 7 49 25.68 • • 55.0 • • • • 7 50 54.98 AT SANTIAGO DE CHILE. 201 MARCH 8, 1853-Contlnned. Remarks. Remarks as for last night, a Tolerably sharp. b niurred. Results. Mean S. F. . . Twelve transits . Mean N. P. . . Twelve transits . h. m. s. . . 72745.11 . . 7 32 29.29 m. s. Rev. + 220.774 .... +8.617 . . + 2 19.985 .... +9.218 . . / H . =2 47.94 . =259.66 h. m. Correction for chronometer at 7 28 . m. s. . . —520.17 h. m. B. Correction for chronometer at 7 32 . . . —520.18 Santiago sid. time N. P 7 27 9.11 4 44 17 it A P. F. limbs in A. R. reduced to arc . . . 11.83 A N. S. limbs micr. in rer 0.601 = 11.71 Variation of A. R. in 4m. 44*. . . . . . . + 0.61 . . . 13.44 Variation of declination in 4m. 44«. . . ort. for ilium, of micr. wires ... + 0.50 2.20 Observed N. S. diameter .... 10.03 h. m. A o at 7 21 . . 0.17 h. m. Apat726 . it 0.18 MARCH 9, 1853. d B Chronometer time of transit. Planet— Star. Thermometers. • MpTn rtf wirn Micr. Bar. f Object. A. B. C. D. E. A a. A* Air. Wet. 0 R, s. s. s. s. h. m. s. Rev. m. B. Rev. Inches. e • , H.C. . . . 15412 40.2 53.2 6.0 6 31 53.13 +3.17 27.946 69.6 57.7 2 Mara . . . S.F. J 1.2 14.5 27.2 40.2 53.3 6 34 27.28 3.93} +2 34.15 +0.76} Ther. att 3 H.C. . . . 15412 54.7 7.7 20.6 t 6 36 7.67 2.59 71°. 5 4 Mars . . . N.P. 15.0 28.0 41.0 54.0 6.8 6 38 40.96 3.98 2 33.29 1.39 t.,' :tr V 97.829 5 H.C. . . . 15412 33.5 46.5 59.5 6 40 46.50 1.77 6 Mais . . . S.F. 54.5 7.5 20.5 33.5 46.5 6 43 20.50 2.47} 2 34.00 0.70} 7 H.C. . . . 15412 49.7 2.8 15.8 6 45 2.77 1.62 e Mars . . . N.P. 10.0 23.1 36.1 49.0 2.0 6 47 36.04 2.94 2 33.27 1.32 9 H.C. . . . 15412 t g 26.5 39.6 52.6 6 49 39.57 1.41 10 Mars . . . S.F. 47.9 1.2 14.2 27.0 40.2 6 52 14.10 2.13 2 34.53 0.13 11 H.C. . . . 15412 9.8 22.8 35.8 6 54 22.80 1.34} 12 Mars . . . N.P. 30.3 43.1 56.3 9.3 22.3 6 56 56.26 2.57} 2K1.46 1.23 13 H.C. . •. . 15412 40.5 54.0 6.6 t f 6 58 53.70 1.27 14 Mars . . S.F. 15.3 28.2 41.2 54.2 7 1 28.27 1.85 2 34.57 0.58 15 H C. . . . 15412 4.5 17.5 30.3 7 3 17.43 1.14 16 Mars . . . N.P. 25.0 38.0 51.0 4 0 17.0 7 5 51.00 2.32 2 33.57 1.18 17 H C. . . . 15412 . 16.5 29.5 42.5 7 7 29.50 1.06 18 Mars . . . S.F. 37.5 50.7 3.8 16.7 30.0 7 10 3.71 1.64 2 34.24 0 58 19 H.C. . . . 15412 46.0 5?. 8 11.9 7 11 58.90 1.02} 20 Mars . . . N.P. 6.5 19.5 32.6 45.5 58.5 7 14 32.52 2.15 2 33.62 1.12} 21 H.C. . . . 15412 27.2 40.6 53.5 . 7 16 40.43 0.97} 22 Mars . . . S.F. 48.8 2.0 15.0 27.8 41.0 7 19 14.92 1.46} 2 34.49 0.49 23 H.C. . . . 15412 47.0 0.0 13.0 . 7 21 0.00 0.95 24 Mars . . . N.P. 7.7 20.7 33.6 46.7 59.5 7 23 33.64 2.111 2 33. 64 1.09 25 H. C. . . . 15412 24.3 37.2 50.2 7 25 37.23 0.96 26 Mars . . . S.F. 45.6 58.6 11.6 '-M.6 37.6 - -Jrt 11.60 + 1.43 +2 34.37 +0.47 26' 202 OPPOSITION OF MARS, 1851-52, MARCH 9, 1853— Continued. 4 Chronometer time of transit. Planet — Star. Thermometers. i . i 2 Object. A. B. C. D. E. A a. A<5. Air. Wet. 8. s. s. 8. h. m. 8. Rev. m. s. Rev. Inches. 0 . 2 27 H.C. . . . 15412 •21.0 34.0 46.8 7 31 33.93 +0.99 27.948 67.0 55.0 28 Mars . . . N.I'. 41.5 54.5 7.6 20.6 33.5 7 34 7.54 2.05 +2 33.61 +1.06 Thcr. att. 99 H.C. . . . 15412 . 19.5 32.3 45.2 7 35 32.33 1.081 69° .3 30 Mars . . . S.F. 40.7 53.7 6.8 19.7 32.8 7 38 6.74 1.48 2 34.41 0.39J to 32° F. 27.837 31 H.C. . . . 15412 . 9.7 23.7 35.6 8 14 22.67 2.08 33 Mars . . . N.P. 30.9 ' 43.8 56.9 9.6 22.7 8 16 56.78 2.87J 2 34.11 0.79J 33 H.C. . . . 15412 30.0 43.0 56.0 8 18 43.00 2.29J 34 Mars . . . S.F. 52.0 4.8 17.8 30.8 43.9 8 21 17.86 2.48 2 34.86 0.181 35 H.C. . . . 15412 13.0 26.0 38.8 8 23 25.93 2.53 38 Mars . . . N.P. 34.0 47.1 0.3 i 13.3 26.2 8 26 0. 18 3 31 2 34.25 0.78 37 H.C. . . . 15412 4 f 34.6 47.6 0.6 8 27 47.60 2.76 38 Mars . . . S.F. 66.5 9.6 22.7 35.5 48.5 8 30 2-3.56 +2.89 +2 34.96 +0.13 Remarks. Unsurpassed, in good dcfiniti >n and steady motion, by any night during the series. Results. h. m. s. m. s. Rev. i it MeanS. F. . . Ten transits . . . . 7 21 52.76 + 2 34.458 .... +0.502 . . . . =0 9.-,8 Mean N.P. . . Nine transits . . . 7 22 41.66 + 2 33.647 .... +1.108 . . . . =021.59 h. m. m. s. h. m. s. Correction for chronometer at 7 22 . . —522.90 Santiago sid. time S.F . 7 16 29.86 Correction for chronometer at 7 23 . . —522.90 Santiago sid. time N.P . 7 17 18.76 48.90 A P. F. limbs in A. R. reduced to arc . . . 12.16 0.606 = 11.81 Variation of A. R. in 49s . . . + 0.12 Variation of declination in 49s. . . . + 0.09 Observed P. F. diameter .... . . . 12.28 Corr. for diam. of micr. wires . . . — '2.20 Observed N. S. diameter 9.70 b. m. ir li. in. ,i A D at 7 15 . 0.01 A o at 7 16 . 0.02 MARCH 10, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A (5. Air. Wet. s. 8. s. 8. s. h. m. s. Rev. m. s. Rev. Inches. O • 1 2 3 4 H.C. . . . 15412 Mars , . . 8.F.- H.C. , . . 15412 Mars . . . N.P. 21.5 43.7 34.5 25.3 15.5 57.0 47.8 38.3 28.5 10.0 1.0 51.2 41.3 14.0 54.3 6 34 56.90 6 37 47.78 6 39 38.27 6 42 28.42 +3.09 — 4.82J +2.72J — 4.37J +2 50.86 2 50.15 — 7.91J 7.10 27.980 Ther. att. 71°. 3 Bar. red. to 32° F. 27.863 64.8 59.5 5 6 H. C. . . 15412 Mars . . . S.F. 26.5 18.3 40.0 31.3 52.5 44.3 6.0 57.3 18.8 10.2 6 44 52.78 6 47 44.28 +2.53 —5.641 2 51.50 8.17} 7 8 H. C. . . . 15412 Mars . . . N.P. 17.5 40.2 30.5 52.7 43.5 5.5 56.5 9.5 6 53 52.60 6 56 43.50 +1.701 —5.58 +2 50.70 — 7.28J AT SANTIAGO DE CHILE. 203 MAHCH 1O, 1853— Continued. V B 1 Chronometer time of transit. Planet— Star. Thermometers. fi £ ft Object. A. B. C. D. E. A a. AJ. Bar. Air. VV.-I. d '£. s. s. B. s. s. h. m. s. Rev. m. 8. Rev. Inches. a o 9 B.C. . . . 1.1.112 23.7 36.8 49.9 7 3 36.80 +2.96 27.980 64.8 59.5 10 Mars . . . 8.F. 2.5 15.5 28.5 41.3 54.5 7 6 28.46 —5.02 +2 51.66 —7.98 11 B.C. . . . 15412 13.1 26.2 39.0 . t 7 8 26.10 +2.92J Tliir. att. 71". 3 13 Mars . . . N.P. 50.5 3.5 16.5 29.5 42.5 7 11 16.50 —4.45 2 50.40 7.37i Bar. red. to 3-2" F. 13 H.C. . . . 15412 . . 8.0 21.0 34.0 . 7 13 21.00 +2.87 27.863 14 Mars . . . S.F. 46.3 59.4 12.3 25.4 38.4 7 16 12.36 —5.17 2 51.36 8.04 15 B.C. . . . 15412 . . 13.6 26.5 39.5 7 18 26.53 +2.84 16 Mars . . . N.P. 51.5 4.5 17.5 30.5 43.5 7 21 17.50 — 4.63t 2 50.97 7.471 17 n.c. . . . 15412 . . 46.8 59.6 12.6 7 24 59.67 +2.65 18 a Mars . . . S.F. 38.3 57.2 4.2 17.3 7 27 51.27 —5.37 +2 51.60 —8. OS Remarks. Same remarks as last night. Bothered hy the lamps burning badly all the time, a Lamps went out. Results. b. m. s. m. a. Rev. ; « Mean N.P. . . . Four transits . ..72 56.48 + 250.555 . . . —7.309 . ... =2 22.45 Mean S. F. . . . Five transits . ..73 12.83 + 251.396 . . . —8.026 . ... =2 36.43 h. m. m. 8. b. m. s. Correction for chronometer fit 7 3 . . . —526.14 Correction for chronometer at 7 3 . . . —526.14 . . . 6 57 46 69 A P. F. limbs in A . R. reduced to arc . . . 12.61 A N. S. limbs mic. in rev. . . . . . 0.717=13.97 Variation of A. R. in 16*. . . . .• 0.05 Variation of declination in 16*. — 0 03 . . . 12 56 9 on Observed N. S. diameter . . . • . — *£.2£U . . 11.74 h. m. ;/ b. m. , A f at 6 56 . . . . . . 0.16 A p at 6 56 . 0.15 MARCH 11, IV,;. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet — Star, Bar. Thermometers. A. B. C. D. E. A a. A*. Air. Wet. s. s. s. s. s. b. m. s. Rev. B. Rev. Inches. • • 1 Mars . . . S.F. t t 6.8 19.8 32.6 6 51 19.73 — 4.16 28.018 61.5 58.5 2 Bessel ... 339 . . 12.5 . . 5 52 12.48 —13.40 —52.75 +9.24 3 4 5 Mars . . . N.P. Bessel . . . 339 Mars . . . S.F. • • 4.6 33.6 17.2 10.2 46.6 30.2 59.7 • • 6 54 17.33 6 55 10.18 6 56 46.63 +2.76 -7. 01J +2.10 52.85 9.77J Tber. att. 70'. 3 l!;ir. r-'-d. to 32° F. 27.907 6 Bessel ... 339 • • • • 37.8 • • • • 6 57 37.78 —7.07 51.15 9.17 7 Mars . . . N.P. . 21.5 34.5 65821.53 +2.59 8 Bessel ... 339 14.3 • • • . 6 59 14.28 —7.13 52.75 9.73 9o Mars . . . S.F. 18.0 30.5 43.5 7 2 30.67 +1.91 10 Bessel . . . 339 • • • • 22.5 7 3 22.48 —7.134 —51.81 +9.041 204 OPPOSITION OF MARS, 1851-52, MARCH 11, 1 Wi < otiliim, «l. V V e g Object. Chronometer time of transit. Mean of wires Micr. Planet — Star. Bar. Thermometers. A. B. C. D. E. A a. AJ. Air. Wet. «S d Z s. s. s. s. s. h. in. s. Rev. s. Rev. Inehes. 0 O 11 Mars . . . N.P. 34.0 47.0 59.6 7 11 46.87 +2.35 28.018 61.5 58.5 1!! Bessel ... 339 • • • • 39.0 • • • • 7 12 38.98 —7.35 —52.11 +9.70 Ther. att. 13 Mars . . . S.F. . . 20.0 33.0 46.0 . . 7 15 33.00 +2.05 70°. 3 14 Bessel ... 339 • • 34.6 • • 7 16 24.58 — 6.92} 51.58 8.97} Bar. red. to 32° F. 27.907 15 Mars . . . N.P. 9.7 33.8 35.8 . . 7 19 22.77 +2.64 16 Bessel ... 339 • • • • 15.5 • • 7 20 15.48 —6.95 52.71 9.59 17 i Mars . . . S.F. . . 1.6 14.6 27.5 , ^ 7 22 14.57 +2.02 18 Bessel . . . 339 6 3 7 23 6.28 7.01 51 71 9 03 19 Mara . . . N.P. 1.4 14.5 27.3 7 25 14.40 +2.61 20 Bessel ... 339 6.6 7 26 6.58 7.00 52 18 9 61 31 Mars . . . S.F. 16.3 29.2 42.1 7 27 29.20 +2.00} 32 Bessel ... 339 21.0 7 28 20.98 7.00 51 78 9 OOi 93 Mars . . . N.P. 1.6 14.9 27.6 7 30 14.70 +2.61 24 Bessel ... 339 7.3 7 31 7.28 6.96} 52.58 9 57i 25 Mara . . . S.F. 16.8 30.0 42.8 7 32 29.87 +2.02 36 Bessel ... 339 • • 21.5 • • • • 7 33 21.48 — 6.96} 51.61 8.98* 27 Mars . . . N.P. . . 38.4 51.4 4.3 t , 7 34 51.37 +2.58 98 Bessel ... 339 7 35 43.78 g 971 eo 41 9c\t\i 99 Mare . . . S.F. 27.5 40.5 63.5 7 38 40.50 +2.00} O^.-il lOOf 30 Bessel ... 339 • • 31.5 • • • • 7 39 31.48 —7.02 50.98 9.02} 31 Mars . . . N.P. . . 17.5 30.5 43.5 t ( 7 41 30.50 +2.51 * 32 Bessel ... 339 • • • • 32.5 • • • • 7 42 22.48 —6-96 51.98 9.47 33 Mars . . . S.P. . . 38.6 51.6 4.5 . 7 43 51.57 + 1.93 34 Bessel ... 339 43.0 7 44 42 98 o ngi ei ji 8OC] 35 Mars . . . N.P. 36.3 49.5 2.5 7 46 49.43 — oty*j +2.56 O1.41 . w£ 36 Bessel . . . 339 41 3 747 41 OS R B7 37 Mars . . . S.F. t € 23.6 37.3 50.3 1> 41. Jo 7 49 37.07 — O.O/ +2.00i 51.85 9.43 38 Bessel ... 339 38.7 7 50 28.68 —6.80 51.61 8.80i 39 Mare . . . N.P. . . 47.4 0.4 13.4 7 52 0.40 +2.65 40 Bessel . . . 339 • • • • 52.5 • • • . 7 52 52.48 — 6.75J 52.08 9.40} 41 Mars . . . S.F. . . 18.4 31.2 44.0 . 7 54 31.20 +2.07 42 Bessel ... 339 • • 22.4 • • . . 7 55 22.38 —6.73 51.18 8.80 43 Mars . . . N.P. 50.8 3.6 16.6 7 57 3,73 +2.79 44 Bessel ... 339 • • • • 56.0 • . . . 7 57 55.98 —6.63 52.25 9.42 45 Mars . . . S.F. . . 32.3 35.4 48.2 7 59 35.30 +2.18 46 Bessel ... 339 • • • • 26.5 • . . . 8 0 26.48 —6.56} 51.18 8.74^ 47 48 Mars . . . N.P. Bessel . . . 339 . . 13.3 26.3 18.5 39.2 • • 8 2 26.27 8 3 18.48 +2.91 — e.sa 52.21 9.44 49 50 Mars . . . S.F. Bessel ... 339 , . 96.5 39.3 30.5 52.3 • • 8 4 39.37 8 5 30.48 +2.21 —6.49 51.11 8.70 61 • Mars . . . N.P. Bessel . . . 339 . . 36.0 48.5 40.5 1.7 8 6 48.73 8 7 40.48 +2.89 — 6.44} 51.75 9.331 28.022 61.0 56.6 53 54 Mars . . . S.F. Bessel ... 339 • • 57.2 10.0 1.3 22.8 : : 8 10 10.00 8 11 1.28 +2.39 — 6.26i 51.28 8.65} Ther. att. 68°. 0 Bar. red. to32°F. 55 56 Mars . . . N.P. Bessel . . . 339 - 10.5 23.5 15.0 36.5 • • 8 12 33.50 8 13 14.98 +3.06} —6.23 —51.48 +9.29} 27.915 AT SANTIAGO DE CHILE. 205 SEARCH 11, 1852— Continued. Remarks. Same remarks as last night, a Some what blurred. b Very sharp and steady. Results. h. m. 8. s. Rev. / // Mean 8. F. . . Fourteen transits . . . 7 33 32.05 — 51.520 .... +8.931 . ... =3 54.06 Mean N. P. . . Fourteen transits . . . 7 36 39.37 — 52.228 .... +9.523 . ... =3 5.60 h. m. m. a. h. m. B. Correction for chronometer at 7 34 > * . —5 29.36 1 28 2.69 Correction for chronometer at 7 37 . . . —529.36 . . 7 31 10 01 3 7 32 ir n A P. F. limbs in A. R. reduced to arc , 10.62 A N. S. limbs micr. in rev. . . . . 0.592 = 11.54 Variation of A. R. in 3m. 7» + 0.69 Variation of declination in 3m. 7«. . . +. 0.38 Observed P. F. diameter 11.31 Corr. for diam. of micr. wires . . . . — 2.20 9.72 h. m. // h. m. // A o at 7 28 . 0.17 A o at 7 32 . . . 0.18 MARCH 13, 1853. V i Chronometer time of transit. Micr. Planet— Star. Bar. 'hcrmometers. 1 Object. A. B. C. D. E. A a. it Air. Wet. 1 6 s. i. s. s. B. h. m. s. Rev. B. Rev. Inches. O 0 z, 1 Mars . . . S.F. . . 33.6 46.5 . 6 40 33.58 —4.19 27.981 59.6 2 Bessel ... 339 . . . 3.3 6 41 3.28 4.17J —29.70 — 0.011 Ther. att. 3 Mars . . . N.P. t t 47.0 0.5 13.4 , . 6 43 0.30 3.62i 70°. 7 4 Bessel ... 339 31.0 6 43 30.98 4.16} 30.68 +0.56 Bar. red. to 32° F. 27.866 5 Mars S.F. 12.5 25.4 38.4 6 45 25.43 4.32$ 6 Bessel ... 339 • • 55.0 6 45 54.98 4.39 29.55 — 0.03J 7 Mare . . . N.P. . 59.0 12.0 24.6 6 47 11.87 3.79 8 Bessel ... 339 • • • • 42.0 • • 6 47 41.98 4.251 30.11 +0.461 9 Mars . . . N.P. . 5.2 18.2 31.1 6 49 18.17 3.85} 10 Bessel ... 339 • • 4S.2 • • • • 6 49 48.18 4.361 30.01 +0.51 11 Mars . . . 8 F. . 50.3 3.8 16.8 6 52 3.60 4.53J 12 Bessel . . . 339 • • 33.5 • . . • 6 52 33.48 4.43 29.88 —0.101 13 a Mars . . . S.F. 10.3 23.3 36.3 . 6 54 33.30 4.651 14 Bessel ... 339 • • • • 2.5 • • • • 6 55 2.48 4. 52J 29.18 —0.13 15 Mars . . . N.P. 1.5 14.4 27.2 . 6 56 14.37 4.06 16 Bessel ... 339 . . . 44.5 • • 6 56 44.48 4.62 30.11 +0.56 17 Mara . . . S.F. 30.5 43.5 56.5 6 58 43.50 4.76 18 Bessel ... 339 • • 12.5 • • 6 59 12.48 4.58 28.98 —0.18 19 Mara . . . N.P. 22.2 35.0 48.0 7 0 35.07 4.21 20 Bessel ... 339 . . 5.2 . . 7 1 5.18 4.641 30.11 +0.431 ni Mars . . . S.F. 13.3 26.5 39.4 . 7 7 26.40 5.06 99 ROCCP! *WQ 4.81 —0.25 •1 23 uessi!i ... ojy Mars ... N.P 13.6 26.7 39.6 7 9 26.63 4.41 24 Bessel ... 339 . . 56.5 • • 7 9 56.48 4.80 29.85 +0.39 Ml Mars . . . S.F. 28.5 42.0 54.5 . 7 12 41.67 S.08 26 Bessel . 339 4.83J > . • — 0.241 27 Mars . . . N.P. 2.5 15.5 28.3 7 16 15.43 4.52 28 Bessel ... 839 • • • • 45.1 • • • • 7 16 45.08 -4,871 —29.65 +0.3H 206 OPPOSITION OF MAES, 1851-52, MARCH 12, 1S.VJ -t i.i.limi. il. S Chronometer time of transit. Planet— Star. Bar Thermometers. 1 Object. A. B. C. D. E. A a. A* Air. Wet. ,o d B. s. s. s. s. ll. IN. S. Rev. 8. Rev. Inches. O „ fc 39 Mars ... S.F 36.5 49.5 2.5 7 18 49.50 —5.11 27.981 59.6 30 Bessel ... 339 18.5 . . 7 19 18.48 4.81} —28.98 — 0.295 Ther. at 31 Mare ... N.P 84.2 37.3 50.2 , 7 22 37.23 4.54} 70°. 7 33 Bessel .• . . 339 . . . . 6.8 7 23 8.78 4.85, 29.55 +0.31 Bar. rer to 32° * 27.866 33 Mars ... S.F 50.5 3.5 16.5 . . 7 25 3.50 5.17 34 Bessel ... 339 32.5 • • 7 25 32.48 4.85} 28.98 — 0.31{ 35 Mare . . . NP 15.0 28.3 41.0 , . 7 29 28.10 4.56 36 Bessel ... 339 • • 57.5 7 29 57.48 4.90 29.38 +0.34 37 Mara ... S.F . . 15.3 28.0 41.0 7 31 28.10 5.17J 38 Bessel ... 339 • • 56.6 • • • • 7 31 56.58 4.79J 28.48 —0.38 39 Mars . . . S.F. . . 59.7 12.7 25.5 , . 7 34 12.63 5.13} 40 Bessel ... 339 41.5 • • • • 7 34 41.48 4.77 28.85 -0.36} 41 Mars . . . N.P . , 10.5 23.5 36.5 7 36 23.50 4.55} 42 Bessel ... 339 53.0 • • • • 7 36 52.98 4.80J 29.48 +0.25 43 Mare . . . g.F. . . 30.8 43.9 56.7 . . 7 38 43.80 5.18 44 Bessel ... 339 12.6 7 39 12.58 4.78} 28.78 —0.39} 45 Mara ... N.P , . 9.7 22.6 35.7 . f 7 40 22.67 4.57 46 Bessel ... 339 52.0 7 40 51.98 4.76 29.31 +0.19 47 Mara . . . S.F. . . 4.0 17.0 30.0 7 42 17.00 5.14} 48 Bessel ... 339 45.7 • • 7 42 45.68 4.73 28.68 —0.41} 49 Mare . . . N.P. 55.5 8.5 21.3 . 7 44 8.43 4.55 50 Bessel . . . 339 ' • • • 37.6 • • 7 44 37.58 4.68 29.15 +0.13 51 Mars . . . S.F. . 37.3 50.3 3.2 t 7 45 50.27 5.12 53 Bessel ... 339 19.0 7 46 18 98 4 66 Oft 71 53 Mars . . . N.P. 21.0 34.5 47.4 7 48 34.30 4.46 SiO, 1 I 54 Bessel ... 339 3.8 7 49 3 78 4.59 55 Mare . . . S.F. 18.8 21.6 34.6 7 50 21.67 5.07 56 Bessel ... 339 50.3 • • 7 50 50.28 4.58} 28.61 —0.48} 57 Mare . . . N.p. . . 7.3 20.3 33.3 . 7 52 20.30 4.42 58 Bessel ... 339 49.5 7 52 49.48 4.47 29.18 +0.05 59 Mara . . . N.P. . , 52.8 5.7 18.7 . 7 54 5.73 4.41 60 Bessel ... 339 35.0 7 54 34 98 4 47i 61 Mars . . . S.F. 13.7 26.7 39.6 7 56 26.67 4.96} +0.06J 62 Bessel ... 339 • • 55.0 7 56 54.98 4.40} 28.31 —0.56 63 Mare . . . N.P. 29.8 43.0 55.8 7 58 42.87 4.30 64 Bessel ... 339 12.0 7 59 11.98 4.37 29.11 +0.07 65 Mare . . . S.F. . . 3.2 16.0 29.0 . 8 0 16.07 4.88 66 Bessel ... 339 44.5 67 Mare . . . N.P. 43.8 56.7 9.8 o u 44.48 8 1 56.77 4.32 4.23 28.41 — 0.56 68 Bessel ... 339 • • 26.0 • • • . 8 2 25.98 4.25 29.21 +0.02 69 Mare . . . S.F. . . 11.5 24.4 37.3 8 3 24.40 4.80} 70 essel ... 339 • • B.7 • . 8 3 52.68 4.19} 28.28 —0.61 71 Mare . . . N.p. . . 55.5 8.5 21.4 . 8 6 8.47 4.13} 72 essel ... 339 • • 37.5 8 6 37.48 4.10 29.01 0.03} 73 Mars . . . S.F. . . 23.7 36.8 49.8 8 7 36.77 4.68 74 Bessel ... 339 • • 5.2 • • • • 8 8 5.18 —4.09 —28.41 —0.59 AT SANTIAGO DE CHILE. 207 MARCH 13X 1852— Continued. Chronometer time of transit. Planet — Star. Thermometers. 1 h Object. A. It. c. D. E. A a. A A Air. Wet. I 8. 8. 8. 9. a. h. m. >. Rev. 8. Rev. Inches. • • 75 Mars . . . N.P. 5.0 18.0 31.0 8 9 18.00 —4.03 27.987 57.9 76 Bessel ... 339 • • 47.0 8 9 46.98 4.0:!;. —28.98 — O.OOJ 77 Mars . . . S.F. 55.0 7.8 21.0 8 11 7.93 4.59 Ther. an. (i!)1 1 78 Bessel ... 339 . 36.5 , 8 11 36.48 3.95 28.55 0.64 Bar. red. to 32° F. 79 Mars . . . N.P. 44.6 58.3 11.2 8 12 58.00 3.93 29.876 80 Bessel ... 339 27.3 8 13 27.28 —3.86 —29.28 —0.06 Remarks. Good images and satisfactory measures throughout. a Recorded 41 .3s. at wire D. b Not incorporated into the means. Results. h. m. s. s. Rev. / // Mean S. F. . . Five transits . . . . 6 50 15.88 — 29.458 .... —0.093 . . . . =0 1.81 Mean N. P. . . Five transits . . . . 6 51 15.95 30.204 .... +0.506 . 0 9.86 Mean N. P. . . Fifteen transits . . . 7 45 31.10 29.325 .... +0.147 . . . 0 2.86 Mean 8. F. . . Thirteen transits '. . 7 46 35.25 — 28.618 .... —0.467 . . . . =0 9.10 h. tn. m. a. h. m. s. Correction for chronometer at 6 50 . . . —5 32.26 Correction for chronometer at 6 51 . . —5 32.26 h. m. m. s. h. m. s. Correction for chronometer at 7 46 . . —5 32.37 Correction for chronometer at 7 47 . . —5 32.37 n ti A P. F. limbs in A. R. reduced to are . . 11.19 A N. S. limbs iiti'-r. in rev 0.599=11.67 Variation of A. R. in 1m . . + 0.25 Variation of declination in 1m. ... . + 0.13 Observed P. F. diameter ..... . . 11.44 Corr. for diarn. of micr. wires . . . — 2.20 Observed N. S. diameter 9.60 ;/ n A P. F. limbs in A. R. reduced to arc . . 10.60 A N. S. limbs micr. in rev 0.614 = 11.96 Variation of A. R. in 1m. 4* . . — 0.27 Variation of declination In 1m. 4». — 0.13 Observed P. F. diameter . . 10.33 Corr. for diam. of micr. wires .... — 2.20 Observed N. 3. diameter 9.63 h. m. n h. m. // . . . 0.00 A pat 7 40 0 00 A p at 6 47 . 0.01 A 0 at 7 41 . 0.01 MARCH 13, 1859. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A i. Air. \\Vt- s. s. 8. B. 0. h. m. s. Rev. m. s. Rev. Inches. • * 1 3 3 4 5 6 Mara . . . S F. Bcsscl ... 339 Mar.-. . . . N.P. Bessel ... 339 Mara . . . S.F. . . .339 • • • • 51.5 • • • • 6 4851.48 —4.87 -M-ty -9.69 9.06J —9.67 27.973 Thcr. att. -.-'. .1 liar. rcii. to 31° F. 27.853 68.3 59.0 44 0 6 50 56.93 —4.32 +4.74J —5.00 +4.67 • • 23.8 • • 6 53 36.73 208 OPPOSITION OF MARS, 1851-52, MARCH 13, 185)8— Continued. No. for reference. Object. Chronometer time of transit. Micr. Planet— Star. Thermometers. A. B. C. D. E. A a. A i. Air. Wet. s. s. s. s. B. b. m. a. Rev.. s. Rev. Inches. - • 7 8 9 10 11 12 13 14 15 16 17 18 19 30 91 S3 S3 24 25 36 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 43 43 44 45 46 47 48 49 60 51 52 Mars . . . N.P Bessel ... 339 Mars . . . S.F. Bessel ... 339 Mare . . N.P Bessel ... 339 Mars . . . S.F. Bessel ... 339 Mars . . . N.P. 8.5 • • 6 55 21.43 —4.44 -1-4 68 —0.13 9.66} 9. Hi 9.74 9.23} 9.89} 9.43 9.87} 9.28 9.87} 9.33 9.91} 9.97 9.38 9.40 10.02} 9.44 10.06 9.45 10.09 9.51 10.13 —9.43} 37.973 Thcr. att 72°. 4 Bar. red to 32° F 27.853 68.3 59.0 • • 46.0 • • • • 6 57 58.93 —5.13 • • 46.5 • • • • • • 6 59 59.43 —4.63 +4.48} —5.36 4-4.38 . • • 46.0 • • • • • • 7 4 58.93 39.8 7 7 43.73 —4.84 +4.39} —5.52 . . . Bessel ... 339 Mars . . . S.F. 10 6 7t9 23.53 Bessel ... 339 Mars . . . N.P. Bessel ... 339 Mars . . . S.F. Bessel ... 339 Mare . . . N.P. Bessel ... 339 Mars . . . S.F. Bessel ... 339 Mars . . . N.P. Bessel ... 339 Mara . . . S.F. Bessel ... 339 Mars . . . S.F. 48.5 • • • • 7 10 1.43 —5.12 • • 33.5 • • • • • • 7 15 45.43 —5.59 +4.281 —5.02 . . . • • 19.2 • • • • • • 7 30 33.13 • • 56.3 • • • • 7 22 9.23 —5.63} 44.5 • • • • • • 7 25 57.43 —5.03 • • 32.5 • • • • 7 39 45.43 —5.69} +4.32 —5.78 . . . 9 3 7 31 33.33 Bessel ... 339 Mars . . . N.P. Bessel ... 339 Mars . , . N.P. • • 54.6 • • • • • • 7 35 7.53 —5.17 +4.31 —5.16 . . . 32 5 7 30 45.43 Bessel ... 339 Mars . . . S.F. Bessel ... 339 Mars . . . N P. • • 16.8 • • 7 38 29.73 —5.76 56.7 7 41 9.63 —5.19 +4.35 — 5.79} . . . Besscl ... 339 13.8 7 43 26.73 Bessel ... 339 Mars . . . N.P. Bessel ... 339 Mars . . . S.F. • • 47.9 • • • • 7 45 0.83 —5.19 30.3 7 46 43.23 —5.75} +4.33} —5.15} +4.35} -S.72 +4.40 —5.12 +4.31} . . . lessel . . . 339 Mars . . . N P. Bessel ... 339 Mare . . . S.F. losM'l ... 339 Mars . . . N.P. Bessel ... .139 16.3 • • • • • . 7 48 29.23 • • 4.8 • • • • • . 7 50 17.73 • • 35.2 • • 7 51 48.13 AT SANTIAGO DE CHILE. 209 MARCH 13, 1 vv* Coiit iniii-il. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. 0. D. E. A a. A ,5. Air. Wet. s. 8. p. s. ' ll. 111. 8. Hcv. s. Rev. [riches. O O 53 54 55 56 57 58 59 60 Mars . . . S.F. . . 50.5 7 54 3.43 —5.75 —10.11 9.56 10.16 —9.64 27.976 Ther. alt. 71°. 1 Rnr. n-d. to 3-2° F. 27.860 67.3 57.7 Bessel . . 339 Mars . . N.P. 24.3 7 55 37.23 —5 61 -1-3 95 Bessel ... 339 Mars . . . S.F. 50 3 7 58 3.23 —6.21 +3 95 Bessel . . . 339 Mars . . . N.P. 28 0 7 59 40.93 —5.59 HI--S.-I ... 339 Remarks. Never better or more steady images; but the interval of A. R. is so small that neither object can be measured near the centre of the field. Mean S. F. . . Fifteen transits Mean N. P. . . Fifteen transits h. m. Correction fnr chronometer at 7 25 . Correction for chronometer at 7 28 . h. m. h. m. a. . . 7 24 53.07 . . 7 28 20.70 m. s. . . —535.81 . . —5 35.82 // .... 0.18 Results. RRV. — 9.924 / // — 9.359 h. m. B. A N. S. limbs micr. in rev. , . , Variation of declination in 3m. 28*. . Corr. Cur diam. of micr. wires . . . Observed N. S. diameter .... . 0.305=11.01 + 0.46 — 2.20 9.27 A ft at 7 23 . . . . 0.19 MARCH 11. 1853. d V Chronometer time of transit. Miur Planet— Star. Thermometers. 1 Object. A. B. C. D. E. Ad. Aft Air. Wet. s Z s. B. 8. 8. 8. b. m. B. Rev. m. s. Krv. Inches. • • 1 Mars . . . S F. . 0.5 13.5 36.5 , , 6 51 13.50 +3.87 27.988 69.8 58.4 2 H.C. . . . 15808 . . 16.3 28.8 41.8 6 52 28.97 — 6.65i —1 15.47 +9.52J Thfr. att. 3 Mars . . . N.P. 1.2 14.5 37.5 6 54 14.40 -)-3 32 73° 0 4 H.C. . . . 15608 . . 18.5 31.5 44.5 6 55 31.50 —6.87 1 17.10 10.19 Barred, to 32° F. 27.866 5 Mars . . . S.F. . . 48.3 1.3 14.2 6 57 1.27 +2.54 6 H.O. . . . 15608 • • 3.8 16.8 29.6 • • 6 58 16.77 — «.97 1 15.50 9.51 7 Mars . . . N.P. 24.0 37.0 50.0 . 6 59 37.00 +3.06J 8 H.C. . . . 15608 • • 40.1 53.0 5.9 7 0 53.00 —6.99 1 16.00 10.051 9 Mara . . . S.F. . . 30.6 43.5 56.5 . , 7 2 43.53 +2.41 10 H.C. . . . 15608 • • 46.0 58.8 11.6 7 3 58.80 —7.07 1 15.37 9.48 11 35.0 48.0 1.0 7 5 48.00 +2.911 12 H. C. . . . 15608 . . 51.2 4.0 16.8 . * 7 7 4.00 —7.12 1 16.00 10.03J 13 Mars . . . S.F. 21.2 34.3 47.3 7 8 34.27 +2.99 14 H.C. . . . 15608 36.5 49.5 2.5 7 9 49.50 —1.18 —1 15.23 +9.47 27' 210 OPPOSITION OF MARS, 1851-52, MARCH 14, 180a -Continued. I Chronometer time of transit. Micr. Planet— Star. Bar. Thermometers. 1 k. Object. A. B. 0. D. B. A a. A ,5. Air. Wet. £ 6 8. s. e. s. s. h. in. s. Rev. m. s. Rev. Inches. • „ Z 15 Mare N.P. 2.0 15 3 28.1 7 11 15.13 +2.78 27.988 69.8 58.4 16 II. C. . . . 156C8 18.3 31.1 44.0 7 12 31.13 —7.28 —1 16.00 +10.06 Ther. att. 17 Mare . . . S.F. 49.5 2.7 15.6 7 14 2.60 +2.08 73°. 0 18 B.C. . . . 15608 4.5 17.6 30.5 . . 7 15 17.53 —7.281 1 14.93 9.361 Bar. red. 10 33° F. 27.8.6 19 Murs . . .N.P. 45.6 58.5 11.5 . . 7 16 58.53 +2.61 20 H.C. . . . 15608 • • 1.2 14.0 26.8 7 18 14.00 —7.32 1 15.47 9.93 21 Mare . . . S.F. 5.3 17.5 30.8 t t 7 21 17.87 +2.02* as H.C. . . . 15608 • • 19.8 32.6 45.5 • • 7 22 32.63 —7.30 1 14.76 9.321 S3 Mara . . .N.P. . 41.5 54.3 6.6 7 23 54.13 +2-571 84 H.C. . . . 15618 56.8 9.8 22.6 • • 7 25 9.73 —7.30 1 15.60 " 9.871 25 Mars . . . S.F. . 23.1 36.1 48.9 . . 7 26 36.03 + 1.97L 96 H. C. . . . 15608 38.2 51.0 3.8 7 27 51.00 —7.341 1 14.97 9.02 27 Mare , . . N.P. ( 5.0 18.1 31.1 7 29 18.07 +2.57 28 H. C. . . . 15608 • ' 20.5 33.5 46.5 7 30 33.50 — 7.29J 1 15.43 9.661 29 Mare . . . S.F. , . 48.5 1.5 14.5 . . 7 32 1 .50 +1.92 30 H. C. . . . 15608 • ' 3.5 16.5 29.5 • • 7 33 16.50 —7.35 1 15.00 9.27 31 Mara . . . N.P. 29.0 42.3 55.3 , . 7 34 42.20 +2.501 33 H. C. . . . 15608 • • 44.5 57.5 10.5 • • 7 35 57.50 —7.281 1 15.30 9.79 33 Mara . . . S.F. . , 3.0 16.2 28.8 . , 7 37 16.00 +1.89 34 H. C. . . . 15608 • ' 17.8 30.5 43.5 • • 7 38 30.60 —7.31 1 14.60 9.20 35 Mara . . . N.P. . . 24.1 37.1 50.2 . , 7 40 37.13 +2.47 36 H. C. . . . 15608 39.6 52.6 5.5 • • 7 41 52.57 —7.32 1 15.44 9.79 37 Mais . . . S.P. . 53.4 6.5 19.5 f t 8 13 6.47 +2.36 38 H. C. . . . 15608 7.5 20.5 33.5 • • 8 14 20.50 —6.59 1 14.03 8.95 39 Mare . . . N.P. . . 4.5 17.5 30.3 , 8 16 17.43 +3.08 40 H. C. . . . 15608 19.0 32.0 45.8 • • 8 17 32.27 —6.401 1 14.84 9.4?i 41 Mara . . . S.F. , . 5.3 18.2 31.2 . , 8 22 18.23 +2.02 42 H. C. . . . 15608 • • 18.5 31.6 44.6 • • 8 23 31 .57 —6.87 1 13.34 8.89 43 Mara . . . N.P. 46.2 59.2 12.0 . , 8 24 59.13 +2.78 44 H. C. . . . 15608 • • 0.5 13.5 26.5 8 26 13.50 —6.76 1 14.37 9.54 45 Mars . . . S.F. . . 26.2 39.5 52.3 . , 8 27 39.33 +2.17 46 II. C. . . . 15608 • • 40.0 53.0 5.7 • • 8 28 52.90 —6.69 1 13.57 8.86 47 48 Mars . . . N.P. H. C. . . . 15608 . . 52.3 6.8 5.3 19.6 18.3 32.6 t 8 30 5.30 8 31 19.67 +2.841 —6. 56J 1 14.37 9.41 27.E92 64.7 56.4 49 Mara . . . F.F. 13.5 27.0 40.0 8 32 26.83 +2.30 Ther. att. 50 a H. 0. . . . 15608 . . 27.6 40.3 53.4 8 33 40.10 —6. 49 1 13.27 8.79 70.7 Bar. red. to 32° F. 51 Mare . . . N.P. 34.5 47.5 0.5 . . 8 34 47.50 +3.02 27.877 52 H. C. . . . 15608 48.6 1.6 14.5 8 36 1.57 —6.431 —1 14.07 +9.451 Remarks. Quite steady, hut dim all the evenin;. o Recorded 22.6s. at wire B. Results. Mean 8. F. . Mean N.P. . . Thineen transits . . Thirteen tiansits . , h. in. 9. . . 7 35 52.11 . 7 38 39.53 m. i. — 1 14.611 . — I 15.384 . Ri-v. . . . +9.227 . . . . . +9.806 . . / n . . =2 59.83 . . =3 11. 19 AT SANTIAGO DE CHILE. 211 MARCH 1*, 1 vv; < „„<(,,,,, ,1. Results — Continued. h. m. Correction for chronometer at 7 36 . m s. . . —5 33.78 Santiago sid. time for S. F. . . . h. m. f. 7 30 13 33 Correction for chronometer at 7 39 . . . —5 38.78 t-amiugo sid. time for N.P. . . . ... 7 33 0.75 A P. F. limbs in A. R. reduced to arc . . 11.59 A N. S. limbs micr. in rev. . . . . . 0.579=11.28 Variation of A. R. in 2m. 47s. . Observed P. F. diameter .... . . + 0.85 . . 12.44 Variation of declination in 2m. 47s. Corr. for diani. of micr. wires . . . + 0.38 . . — 2.20 Observed N. S. diameter . . . . . 9. 46 h. m. A p at 7 31 . 0.18 h. in. A p at 7 34 . . 0.19 MARCH 15, 1853. 1 Chronometer time of transit. Micr. Planet— Star. Thermometers. 1 Object. A. B. C. D. E. A a. A I. Bar. Air. Wet. 1 i 8. s. 6. s. e. b. m. s. Rev. B. Rev. Inches. * 0 i Mars . . . S.F. 28.5 42.0 55.0 t t 6 49 41.83 +1.05 28.015 64.5 59.1 2 H.C. . . . 15608 . . 13.6 26.5 39.5 . . 6 50 26.53 1.82 —44.70 —0.77 Ther. att. 3 Mare . . . N.P. . . 36.5 49.5 2.5 . . 6 51 49.50 1.58 71°. 7 4 H.C. . . . 15508 21.8 34.8 47.6 • • 6 52 34.73 1.77 45.23 0.19 Bar. red. to 32° F. 27.897 5 Mara . . . S.F. . . 37.5 50.4 3.3 . . 6 53 50.40 0.93 6 H.C. . . . 15608 • • 22.0 35.0 48.0 • • 6 54 35.00 1.73 44.60 0.80 7 Mare . . . S.F. 37.4 50.4 3.2 . t 6 55 50.33 0.85 8 H.C. . . . 15608 • • 2S.O 34.6 47.8 • • 6 56 34.80 1.70 •44.47 0.85 9 Mare . . . N.P. . . 56.0 9.0 21.8 t f 6 58 8.93 1.33 10 H.C. . . . 15608 41.0 54.0 7.0 • • 6 58 £4.00 1.65 45.07 0.32 11 Mars . . . N.P. 59.5 12.5 25.4 7 0 12.47 1.43 12 H.C. . . . 1E608 • • 44.5 57.5 10.5 • • 7 0 57.50 1.69 45.03 0.26 13 Mare . . . S.F. 43.5 57.0 9.8 f t 7 4 56.77 0.70 14 H.C. . . . 15608 • • 38.0 41.0 54.0 • • 7 5 41.00 1.61} 44.23 0.91} 15 Mare . . . N.P. . . 40.5 53.5 6.4 7 6 53.47 1.33} 16 H.C. . . . 15608 • • 25.5 38.5 51.3 • • 7 7 38.43 1.63} 44.96 0.30 17 Mars . . . S.F. , . 41.2 54.3 7.0 7 854.17 0.72 18 a H.C. . . . 15608 • • 25.6 38.5 51.3 • • 7 9 38.47 1.59 44.30 0.87 19 Mars . . . N.P. . . 49.3 2.1 15.0 , f 7 11 2.13 1.30 20 H.C. . . . 15608 34.2 47.0 0.0 • • 7 11 47.07 1.63} 44.94 0.33} 21 Mare . . . S.F. , , 5.3 18.8 31.6 . 7 14 18.57 0.651 22 H.C. . . . 15608 • • 50.0 3.0 16.0 • • 7 15 3.00 1.65 44.43 0.99} 23 Mars . . . N.P. , ." 21.6 34.5 47.4 . , 7 16 34.50 1.27 24 H.C. . . . 15608 6.3 19.9 32.1 • • 7 17 19.20 1.61 44.70 0.34 25 Man . . . S.F. , . 31.3 44.6 57.7 , . 7 20 4,4.53 0.65 26 H.C. . . . 15608 • • 16.0 28.8 41.8 • • 7 21 98.87 1.63 44.34 0.98 27 Mara . . . N.P. . f 29.8 43.3 55.5 t t 7 22 42.87 1.24} 28 H.C. . . . 15608 • • 14.5 27.5 40.4 7 23 27.47 1.68 44.60 0.43} 29 Mara . . . S.F. 33.0 46.2 59.1 7 24 46.10 0.67} 306 H.C. . . . 15608 • • 17.2 30.0 42.8 7 25 30.00 1.69 43.90 1.01} 31 Mare . . . N.I'. 10.5 24.0 36.5 7 28 23.67 1.30 32 H.C. . . . 15608 • • 50.5 8.5 21.5 • • 7 29 8.50 1.741 44.83 0.44} 33 Mare . . . S.F. t f 19.0 32.0 45.0 t t 7 30 32.00 0.73 31 H.C. . . . 15608 • • 2.6 15.6 28.5 7 31 15.57 +1.76 —13.57 —1.04 212 OPPOSITION OF MARS, 1851-52, MARCH 15, 1858— Continued. : Chronometer lime of transit. 1 1 '.'in ot" wires Micr. Planet — s^tar. (Thermometers Bar. 1 Object. A. B. C. n. E. A a. A° F. 79 Mars ... N.P 15.0 28.0 41.0 . . 8 23 28.00 2.75 27.908 80 H.C. . . . 15608 58.5 11.3 24.3 824 11.37 +3.601 —43.37 —0.851 AT SANTIAGO DE CHILE. 213 il \ l!< II 15, 1853— Continued. R< marks. Unite clear ; so that several minute slurs are discernible which were not seen last night. There is, however, a haze or blur about the planet, and an unsteadiness of motion which somewhat impairs the observations. a Recorded 46. 3«. at wire 0. b Recorded 37.8s. at wire D. c Recorded 56. 5s. at wire B. Results. h. m. K. 9. Rev. ' " Mean S. F. . . Twenty transits ... 7 3554.75 -f- 43. 726 .... — 1.104 .... =02! .52 Mean N. P. . . Twenty transits ... 7 38 17.68 +44.365 . . . , —0.533 . . . . =0 10.39 h. m. m. g. „. m. s. Correction for chronometer at 7 36 . . . — 542.21 Santiago aid. time S. F 73012.54 Correction for chronometer at 7 38 . . . — 542.22 Santiago sid. time N. P 73235.46 Interval 2 22.92 A P. F. limbs in A. R. reduced to arc . . . 9. 88 A N. S. limbs micr. in rev 0.571 = 11.13 Variation of A. R. in 2m. 23s +0.80 Variation of declination in 2m. 23s. . 4. 0.34 Observed P. F. diameter 10.38 Corr. for diam. of micr. wires ... — 8.20 Observed N. S. djameier .... 9.27 h. m. H h. m. ' A pat 7 31 . 0.02 A pat 7 33 O.OJ INFERIOR CONJUNCTIONS OF VENUS, 1850-52. MICROMETRICAL OBSERVATIONS, THE 8^ FEET EQUATORIAL, AT THE OBSERVATORY, SANTIAGO, CHILE, BY THE U. S. NAVAL ASTRONOMICAL EXPEDITION. INFERIOR CONJUNCTION OF VENUS: 1850-51. OCTOBER 19, 1850. . Chronometer time of transit. Phinet— Star. ' rliennoineters. B 1 .'11 I'n-il' . Micr. Bar. 1 Object. A. B. C. D. E. A a. A S. Air. Wet. a 6 8. s. s. 8. I. h. ni. s. Rev. | s. Rev. Inches. • 0 K 1 Venus . . . N.P. 27.3 . 21 39 27.30 + 0.38 28.032 70.4 61.5 [I C 30556 5 2 21 40 5.30 11.78 —37.90 —11.40 2 Ther ntt 3 Venus . . . N.P. H C . 30556 • • 45.5 58.5 35.5 • • 21 46 58.61 21 47 35.50 0.71 12.12 36.89 11.41 68°. 0 Bar. red. o 32° F. 4 27.915 5 Venus . . . N.P. 38.5 51.5 4.5 . . . . 21 50 4.73 1.08 HP "lAKRR 41 2 21 50*41.20 12.53 36.47 11.45 6 7 , \j, t , • tJUODO Venus . . . N.P. 0.2 13.4 21 53 13.41 0.93 8 H.C. . . . 30556 • • 36.0 49.0 • • '• • 31 52 49.11 12.43 35.70 11.50 9 Venus . . . N.P. 41.0 54.3 . . 21 54 54.26 0.971 10 ct H.C. . . . 30556 • • 29.3 • • 21 55 29.30 12.521 35.04 11.55 11 Venus . . . N.P. 49.5 16.0 . . 21 57 15.98 0.98 12 H.C. . . . 30556 • • 38.0 4.2 • • 21 57 51.10 12.59 35.12 11.61 13 Venus . . . N.P. t g 32.0 45.0 . , . , 31 59 45.11 0.84 14 H.C. , . . 30556 53.5 6.5 19.5 • • 22 0 19.73 12.501 34.63 11.661 15 Venus . . . N.P. 35.8 49.5 . t 22 2 49.26 0.91 16 H.C. . . , 30556 • • 10.2 33.2 • • • • 22 3 23.31 12.58 34.05 11.67 171 Venus . . . N.P. 48.5 2.0 t 1 , . 22 5 15.09 0.93 18 H. C. . . . 30556 • • 36.0 2.0 • • 33 5 49.00 13.64 33.91 11.72 19 Venus . . . N P. 24.5 37.6 t t 22 7 37.66 0.91 30 H. C. . . . 30556 57.6 11.0 • • 22 8 10.91 13.67 33.35 11.76 21 Venus . . . N.P. 39.0 . 55.6 . , 33 9 55.53 0.87J 23 H.C. . . . 30556 • • • • 28.5 • • 32 10 28.50 12.661 33.97 11.79 23 Venus . . . N.P. 30.6 34.0 , . 22 12 33.91 0 69 34 H.C. . . . 30556 • • 53.3 6.5 • • • • 32 13 6.46 12.59 32.55 11.90 35 Venus . . . N.P. 3.5 17.3 30.5 . . 22 15 30.33 0.62 26 H.C. . . . 30556 49.5 2.5 • • • • 22 16 2.61 12.52 32.28 11.90 27 Venus . . . N P. 47.3 0.5 . . . 22 18 0.46 0.571 28 H.C. . . . 30556 • • • • 32.6 • • • • 22 18 32.60 12.58 32.14 12.001 29 Venus . . .N.P. f r 39.5 53.8 22 20 52.76 0.53 30 H.C. . . . 30556 11.0 24.2 • • • • 22 21 24.21 12.671 31.45 12.141 31 Venus . . .N.P. 31.5 44.6 . . . , 22 36 44.66 0.271 32 H.C. . . . 30556 • • 1.8 15.0 • • • • 22 27 15.01 12.37 30.35 11.991 33 Venus . . . N.P. 40.3 53.5 . . , . 22 29 53.51 0.16J 34 H.C. . . . 30556 • • 10.0 23.5 • • ' ' 22 30 33.36 +12.251 —29.85 —12.09 AT SANTIAGO DE CHILE. 217 OCTOBER 19, 1 850— Continued. No. for reference. Object. Chronometer time of transit. Menn of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. 6.1. Air. Wet. 8. ft 8. «. B. li. m. s. Rev. 8. Rev. Inches. « a 35 Venus . ". . N.P. ^ _ 50.5 3.6 .. 22 32 3.66 ± 0.00 26.022 70.4 61.5 36 H.C. . . 30556 . . 20.0 33.2 . . 22 32 33.21 +12.01 —29.55 —12.01 37 38 39 Venus . . . N.P. H. C. . . . 30556 Venus . . N P. 52.0 21.0 42.1 5.3 . . 35.0 . . 55.5 . . • • 22 35 5.26 22 35 34.61 22 37 55.41 1.00 13.05 1.33 29.35 12.05 Ther. an. 68°. 0 Bar. red. to 32» F. 27.915 40 H.C. . . . 30556 • • 23.6 . . 23 38 23.60 13.59 28.19 12.26 41 42 Venus . . .N.P. H.C. . . . 30556 4.8 18.5 46.8 ] \ 22 40 18.26 23 40 46.80 1.21 13.62 28.54 12.41 43 44 45 c 46 47 48 49 50 Venus . . .N.P. H.C. . . . 30556 Venus . . .N.P. • ' 31.5 44.5 12 5 • • • • 22 42 44.61 22 43 12.50 23 46 7.66 23 46 35.00 22 49 50.86 23 50 18.00 22 54 4.42 22 54 30.50 1.06 13.48i 0.97 13.36 0.651 13.20 0.43 13.05} 27.89 27.34 27.14 25.08 12.42} 12.39 12.54J 12.62J 41.2 54.5 37.5 51 2 7.5 35.0 51.0 18.0 ;; Venus . . . N.P. H. C. 30556 Vi-nus N P H. C. . . . 30556 30.5 51 Venus . . .N.P. 19.0 . . 22 57 19.00 0.20 53 53 54 55 56 57 H. C. . . . 30556 Venus . . . N.P. • • 44.3 35.5 • • 22 57 44. M 22 59 35.50 S3 0 1.29 23 2 9.50 23 2 34.00 23 4 43.20 12.811 3.38 16.12} 3.14f 15.92 2.81i 25.30 25.79 24.50 12.61} 12.74} 12.77} H. C. . 30556 9 5 14.5 H. C. . . . 30556 Venus . . . N.P. 34.0 43.2 58 H. C. . . . 30556 • • 7.2 • • 23 5 7.20 15.61 24.00 12.79} 59 60 61 62 Venus . . . N.P. H. C. . . . 30556 Venus N P • • • • 13.5 37 4 • • 23 6 13.50 23 6 37.40 23 10 *20 23 10 30.50 2.50 15.34 2.15 15.01 23.90 23.30 12.84 12.86 28.044 63.0 53.0 7 2 H. C. . . . 30556 . . 30.5 . . 63 64 65 66 Venus . . . N.P. H. 0. . . . 30558 • • • • 18.8 41.5 46 4 • • • • 23 11 18.80 23 11 41.50 23 14 46.40 23 15 9.00 1.93 14.77 1.374 +14.24} 22.70 -32.60 12.84 —12.87 Ther. att 65°. 0 Bar. red. to 32" F. 27.946 H. C. . . . 30556 • • 9.0 • • Remarks. Fine clear night, after a day « .uremely warm for «o early in the .ea.cn. The planet was tolerably steady until 23A. M. time ; after which, the cusps were evidently elongated. a Recorded 46. 0». at wire D. ' Recorded 44. St. at wire B. 6 Recorded 47. M. at wire A. Results. h. in. 8. Mean . . . Thirty-three transits . . . 82 28 55.03 h. m. Correction for chronometer at 22 29 . . —3 4.33 h. in. A f at 2* 26 . . ,. Rev. -30.02 . . . -19.004 Santiago Bid. time N. P. . . -.3 53.96 h. m. P. . 22 25 50.70 28 218 INFERIOR CONJUNCTION OF VENUS, 1850-51, OCTOIIICH UO, 1850. ., Cliriin fi inn" "' 1 -•!'• Plan«'l— Star. .Thermometers \lcin of wire* Micr. Bar. { Object. A. 11. 0. D. K. A a. A A Air. Wet. 0 - 1. - I. - li. in s. Hov. m. 8. RHV. Inches. • ft 1 W.O 43.5 5! 7 10.0 38.8 31 6 10.01 +5.88 .OOJ 68 8 60.6 9 VIHHM . . . N P. . • i.a 14.5 28.0 41.5 41 7 14.66 0.98 + 1 4.62 — 4.EO 3 U' r 2.-, 13.3 38.8 41.5 . 91 9 88.70 C.31 6>°.2 4 VM.III ... N.P 2J.5 31.2 47.5 . . 21 10 31.07 0.9!-j 1 5.37 5.36i t.'.'s "•' i7.fcSJ6 A \V. t' 47.3 0.5 13.5 , , 21 18 13. us 6.93 6.1 VYlill. . . . N.P. 53.5 6 5 19.B • • 31 19 19.78 1.52 1 6.13 5.41 7 W.O. 53. 9 5.8 1W.O . . 21 21 18.85 7.0?} g \Y,,ii« . . . NT. - 'l 12.3 26.0 t t 31 33 25. 1)3 1.45 1 7.07 5.63} 9 w. i: 58.5 11.2 21.6 21 24 34.68 7.09 lab Vrnu« . . . N P. 5.0 19.0 32.0 • • 21 25 32.12 l.3l| 1 7.44 5.77J n we 4.4 17.5 30.5 t t 21 28 30.72 7.07} 19 Vdiiiw . . . N.P. 13.0 93.3 sa.e • • 21 29 38.68 1.30 1 7.90 5.77} 13 W. C 38 0 51.2 4.5 ai 31 4.48 7.06} 14 Venus . . . N.P. 40.3 59.5 13.0 • • • • 21 33 13.83 1.22 1 8.34 5.84} II \v. r 38 5 51.5 4.5 21 31 4.75 7.13 16 Vonu» . . . N.P. 47.9 0.5 13.8 • • • • 21 33 13.75 1.17} 1 9.00 5.95} 17 W.O 40.3 63.5 7.0 21 38 6.R-3 7.17} IB Vcmu . . . N.P. 50.5 3.5 16.6 • • 31 39 16.78 1.11} 1 9.96 0.06 19 W. C 45.5 58.0 12.3 2.VO '21 41 11.95 7.07} 90 Vinin . . . N.P. 55.9 9.0 93.3 33.5 • • 31 42 23.13 1.13 1 10.18 5.94} 91 W. C 37.6 51.0 4.5 17.5 91 44 4.38 7.15} 94 Vi'iiun . . . N.P. 48.9 Ml 15.5 98.6 43.3' 91 45 15.33 1.09 1 11.04 6.0GJ 13 W. C 33.9 48.5 1.5 15.0 31 47 1.68 7.16} 94 c V.-iiu» . . . N P. 46.0 59.5 13.0 26.5 40.3 21 48 13.06 1.00} 1 11.38 6.16 95 W. C 53.3 7.0 20.0 33.0 91 51 20.00 7.18 96 Vcnm . . . N.P. 5.5 18.6 39.0 45.9 58.6 91 5231.98 0.90} 1 11.9? 6.27} 87 W. C 15.5 99.0 49.0 550 » . 91 54 43.00 7.06} as Vonm . . . N.P. 97.5 41.0 54.5 7.5 90.8 91 5554.36 0.84} 1 12.36 6.22 99 W. C 95.5 39.9 53.5 5.5 , t 91 57 53.30 7.12} 30 Vcnm . . . N.P. 38.6 53.0 5.5 18.5 33.9 31 59 5.36 0.73 1 13.06 6.40} 31 W. C 53.9 r. I 33.0 . 91 1 19.74 7.00} • 39 Vnnui . . . N.P. 1.1 19.6 33.0 46.3 £9.5 33 933.93 0.55 1 13.24 6.45} 33 W. C 91.5 31.0 48.0 1.5 9} 4 48.13 7.15 SM V.'IIIM . . . N.P. 355 48.6 9.3 15.5 38.6 93 6 9.10 0.63 1 13.97 6.53 H W. C 1.9 14.5 97.S 40.8 93 10 27. (!3 7.18} W VBIIVH . . . N.P. 16.0 99.5 43.5 56.0 9.4 93 11 43.63 0.57 1 15.05 6.61} 37 (T.O 48.9 1.5 14.5 97.5 9i 14 14.55 7.16 99 . . N P. 3.5 16.8 30.3 435 57.0 93 15 30.93 0.48} 1 15.67 6.67} 39 \V. IV . . . 33.0 46.9 59.3 19.5 . 91 17 59.43 7.01} 40 Venus . . . N.P. 48.4 1.6 is. a 41.7 99 19 13.09 0.38 1 15.59 6.63} 41 w r 5.0 18.5 31 5 44.6 9391 31.53 7.08 49 Vonut . . . N P. 91.8 • • 46.5 1.5 15.0 U •:•-• ffl n 0.36} 1 16.85 6.81} 43 w. c. . . . 53,3 6.5 «| O1 Ot O1 fft 44 \'-iin* . . . N.P. lt.t 93.5 tt> 53.4 5.5 Um • • 91 96 38.94 7.04 0.30 1 17.34 6.81 4.1 W , M.I 41.9 54.5 9999 41.18 +6.94} 46 V. mi. . . 3J.O 59.0 13.5 95.8 99 :0 !8.9« ±0.00 -t-1 17.7$ -8.94} AT SANTIAGO DE CHILE. 219 OCTOBER !4O, 1 85O— Continued. No. for reference Object. Cllrunoimiti'i t'Dii- ut' ti.u^it. Uean of wir.;s Micr. Plan, t— Star. Bar. rhennninrliT- A. n. C. U. E. An. Ail. M :(•! I'. 27.928 Venus . . . N.P. W. C. . . Venus . . . N.P. W. C Venus . . . N P. W. C. . . . . Venus . . . N.I'. W. C Venus . . . N P. W. C Venus . . . N.P. W. C Vi-nus . . . N.P. 65 W. C 51.0 20.5 33.5 22 12 20.43 7.91 63 Venus . . . N.P. 1?.5 31.5 44.6 5S.O 11.5 23 13 41.83 0.17 1 2l.:,9 7.74 67 W. C 53.6 9.0 23.2 35.5 23 17 23.2) 8.22 68 Venus . . . N.P. 23.5 34.0 47.5 1.0 11.5 23 18 -17.50 0.40 1 25.30 7.83 69 W. C 24.6 38 0 51.5 4.8 . 23 20 51.35 9.42 70/ Venus . . . N.P. 53.5 3.6 17.5 3.1.7 44.3 23 -22 17.33 1.56 1 23.97 7.85 71 W. C 31.5 41.5 58.0 11.1 . 23 25 57.93 8.51} 72 Venus . . . N.P. 53 0 21.6 33.2 51.6 21 27 21.78 +0.72} + 1 26 83 —7.79 Remarks. There is some haze about the horizon, and the niglit is fair; bui, as last night, the planel became uiMcidy about 23 hours sid. time. a Recorded 20.6s. at wire C. d Recorded 31.07. at wire A. b Recorded 31. 5». at wire C. e Tremulous. c Recorded 13. 5j. at wire C. / Indifferent; slar barely visible Mean Thirty-six transits Results. h. m. Correction for chronometer at 22 15 . h m. t. 22 15 0.71 m. ft. . -3 5.57 h. m. A pat 23 11 m. s. Rrv. + 1 15.33 .... —6.615 Santiago i-id. time N. P n . 0.08 . =2 6 D3 h. in ». 22 11 55.14 OCTOBER 21, 1650. Cloudy. 220 INFERIOR CONJUNCTION OF VENDS, 1850-51, OCTOBER 33, 1850. No. for reference. Chronometer time of tnuisil. [can of wires Micr Planet— Star. T Bar. tiermometers. Object. A. B. C. D. E. A a. At. Air. et. s. ll. HI. 8. Rev. j 8. Rev. Inches. 0 • la 2 3 4 5 6 7 1 9 10 11 12 13 14 15 16 17 IS 19 20 21 32 33 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Venus . . . N.P. • • 44.3 12.0 • • • • • • 21 6 57.57 21 7 25.27 21 28 33.04 21 28 57.89 21 31 7.92 21 31 32.39 21 40 23.40 21 40 46.37 21 42 52.77 21 43 15.52 21 45 8.47 21 45 30.84 21 47 13.07 21 47 34.90 21 49 36.02 21 49 57.50 21 51 50.00 21 52 11.30 21 53 50.47 21 54 10.94 21 56 44.65 21 57 4.67 21 58 41.17 21 59 1.44 22 1 1.95 22 1 21.72 22 3 29.92 22 3 49.42 22 5 30.77 22 5 49.73 22 8 3.27 22 8 21.87 23 11 47.92 22 12 6.00 22 12 50.67 22 13 8.34 22 15 6.27 22 15 24.23 22 17 12.67 22 17 29.73 22 19 36.42 22 19 53.52 22 21 24.15 22 21 40.40 22 24 36.46 23 24 52.68 —2.46 12.38$ 0.80 10.42J 0.86 10.44$ 0.97$ 10.58 1.09$ 10.58 1.22 10.60 1.16 10.57 1.42 10.92 1.58 10.92J 1.72 10.95 1.66 10.97$ 1.79 in. '.Ill; 1.82 10.97$ 1.84 10.94 1.86 11.01 1.91 10.96 1.97 11.00 1.98$ 10.96 2 02 10.95 2.05 10.95 2.05 10.91 2.03 10.96 2.02 —10.97 —27.70 24.85 24.47 22.97 22.75 | 22.37 21.83 21.48 21.30 20.47 20.02 tn.27 19.77 * 19.50 18.96 18.60 18.08 17.67 17.95 17.05 17.10 16.25 — 16.23 +9.92$ ' 9.62$ 9.58$ 9. 60$ 9.484 9.38 9.41 9.50 9.34$ 9.23 9.3H 9.17$ 9.154 9.10 9.15 9.05 9.03 6.98 8.93$ 8.894 8.85$ 8.93 +8.95 28.026 rher. alt. 67°. 0 Oar. rtjd. to 33° F. 27.922 67.2 7.6 Venus . . . N.P. W. C Venus . . . N.P. W. C 6.5 41.5 56.5 44.5 54.5 18.8 9.6 J3.0 11.2 24.6 32.5 46.5 37.5 59.5 58.8 13.0 Venus . . . N P. Venus . . . N.P. W. C Venus . . . N.P. 26.2 41.6 39.5 2.0 55.5 17.5 59.8 21.5 22.7 44.4 15.5 42.0 31.0 35.0 57.6 50.0 44.0 48.2 10.5 '• • Venus . . . N.P. W. C Venus . . . N.P. W. C 46.5 9.5 11.3 Venus . . . N.P. W. O Venus . . . N.P 23.8 18.0 37.3 57.5 31.5 11.0 44.6 4.5 24.3 18.1 • • Venus . . . N.P W. C Venus . . . N.P. W. C Venus . . . N.P. W. C Venus . . . N.P. 14.5 35.2 3.2 4.2 28.0 47.8 48.8 16.8 35.7 ,7.5 1.5 2.0 21.5 49.5 49.6 22.0 6.0 8.5 24.2 29.5 53.8 15.0 35.9 3.0 35.0 19.5 21.5 37.5 43.2 6.5 37.5 63.5 50.0 16.0 16.5 48.5 7.2 19.5 Venus . . . N.P. we... 36.5 50.2 Venus . . N.P W. C Venus ... N.P W. C Venus ... N.P W. C Venus ... N.P W. C Venus ... N.P W. C. . 21.2 24.0 39.5 46.0 9.8 34.8 52.5 37.5 55.0 53.2 59.5 23.2 Venui ... N.P W. C • • 10.8 Venui . . . N.P W. C 9.8 23.0 52.5 AT SANTIAGO DE CHILE. 221 OCTOBER •;•:. 185O— Contlnncd. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. thermometers. A. B. C. D. B. A a. ** Air. Wet. s. s. 8. 6. 8. h. in. s. Rev. 8. Rev. Inches. • Q 47 48 49 50 51 52 B< 54 55 56 57 58 59 60 61 63 63 64 65 66 67 68 69 70 71 72 73 74 75 d 76 77 78 79 80 81 e 83 83 84 85 85 87 88 Venus . . . N.P. W. C 22.5 36.0 • ' 17.5 5.5 12.2 56.8 37.3 10.5 47.5 6.5 54 5 31.5 23.8 22 26 49.17 22 27 4.55 22 30 37.17 22 30 52.27 S2 3-2 41.07 22 32 58.97 22 34 29.27 •22 34 43.62 22 38 10.17 22 38 24.32 22 40 43.67 22 40 57.30 22 45 21.67 22 45 34.42 23 47 40.67 32 47 53.22 22 50 29.07 22 50 41.42 22 52 35.07 22 52 46.80 22 5440.22 22 54 52.08 22 56 56.82 22 57 7.62 22 59 2.07 22 59 13.03 23 1 53.17 23 3 3.60 23 5 20.17 23 6 30.70 23 6 30.87 23 6 40.53 23 9 2.17 23 9 11.87 23 11 15.07 23 11 24.37 23 13 34.17 23 13 42.70 23 15 42.17 23 15 50.80 23 18 20.67 23 18 28.53 —2.26 11.06 2.27 11.01 2.36 11.03 2.45 11. lit 0.704 9.35 0.22 8.82| 0.15 8.75 0.26 8.73 0.21 8.63 0.23 8.57 0.32 8.67 0.47 8.71} 0.44 8.814 0.674 8.94 o.eit 8.86 0.88 8.98 0.98 9.07i 1 09 9.334 1.18 9.28 1.34 9.49 1.52 -9.494 —15.38 15.10 14.90 14.35 14.15 13.63 13.75 12.55 12.35 11.73 11.86 10.80 10.% 10.43 10-53 9.66 9.70 9.30 8.53 8.63 —7.86 +8.80 8.74 8.67 8.664 8.644 8.604 8.60 8.47 8.41 8.34 8.35 8.244 8.374 8.364 8.044 8.10 8.094 8.134 8.10 8.08 +7.97J 38.026 Ther. an. 67°. 0 Bar. red. to 3-2° P. 27.922 38.044 Th*r. att. 65'. 2 Bar. red. 10 31' F. 27.946 67.2 64.5 57.6 54.7 Venus . . . N.P. W. C 10.5 24.0 52.3 59.0 43.7 34.6 57.5 34.6 53.2 41 6 Venus . . . N.P. W. C Venus . . . N.P. W. C Venus . . . N.P. w.c Venus . . . N.P. VV. C 17.5 2.5 43.5 17.0 30.8 16.2 57.0 30.5 Venus . . . N.P. W. C 55.0 8.5 Venus . . . N.P w. c 14.0 27.5 Venus . . . N.P. W.C 2.5 15.8 Venus . . . N.P. W. C 8.5 31.8 46.8 0.0 13.5 . 18.8 Venus . . . N.P. W. C. ... 13.5 27.1 Venus . . . N.P. W. C Venus . . . N.P. W. C 30.3 35.5 43.5 48.8 7.5 21.0 13.0 26.2 39.8 Venus . . . N.P. W. C 36.5 40.0 3.5 30.5 16.8 44.0 30.4 57.5 Venus . . . N.P. W. C 53.5 7.0 Venus . . . N.P. W. C 4.3 17.6 40.5 12.0 53.5 25.0 7.5 38.5 Venus . . . N.P. W. C 35.5 49.0 Venus . . . N.P. W. C. . ... 48.5 1.8 24.5 37.5 51.0 Venus . . . N.P. w.c 7.5 21.0 4-2.5 56.0 4.0 42.0 9.5 17.5 55.0 Venus . . . N.P. W. C 15.5 29.0 Venus . . . N.P. W. C. 54.0 7.5 28.5 222 INFERIOR CONJUNCTION OF VENUS, 1850-51, OCTOBER 33, 185O— Continued. Remarks. Miii'li moi-mre. in ihc atmosphere, and the clouds hang low on the Andes. After those to the westward cleared away, the planet and star were iK-auiifully distinct and steady for the earlier observations. a Tht- planet and Mar seen through clouds. d Bad observations. 4 Recorded 2.0s. at wi.e O. e Very tremulous and flaring. c Tremulous. All the observations of the star to No. 56, inclusive, were recorded 1 rev. too little. Results. h. m. s. Mean . . . Forty-four transits . . .222413.06 h. m. m. 8. Correction for chronometer at 22 24 . . — 3 fi.26 h. m. A p at 22 21 . . Rev. — 17.36 . . . . + I = 2 52.02 h. in. s. Santiago sid. time N. P 22 21 4.8( 0.15 OCTOBER 23, 1850. No. for reTen nee. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers A. B. C. 1>. E. A a. A I. Air. VVtl. s. s. s. s. s. ll. 111. S. RC.V. 8. Rev. Inches. • • 1 W.C 1.0 14.0 27.5 . 21 33 27.45 ± 0.00 28.000 68.0 57.2 2 Venus . . . N.P. 37.0 49.0 3.0 16.0 29.5 21 34 2.90 — 20.30} +35.45 -20.50} Ther att. 3 W. C 3.5 16.7 30.0 t 21 35 30.02 ± 0.00 ti4°.0 4 Venus . . . N.P. 38.7 52.5 5.5 19.0 32.5 21 37 5.64 —20.37 35.62 20.37 Har. ri'il. to ar p. 27.905 5,i W. C 13.5 26.5 40.0 21 38 39.93 ± 0.00 6 Venus . . . N.P. 49.0 2.0 15.5 29.0 42.0 21 33 15.50 —20.46 35.55 20.46 7 W. (; 3 0 15 7 21 41 1.) S9 -f- O.OD 8 Venus . . . N.P. 25.0 38.7 53.0 5.0 19.0 21 41 51.94 —20.38 35 95 20.28 9 W. C 16.5 30.0 43.0 21 43 43.12 ± 0.00 10 Venus . . . N.P. 53.0 6.0 20.0 33.0 46.0 31 44 19.60 —20.221 36.48 20.33} 11 W. C 17.0 30.0 43.0 21 45 43.28 ± 0.00 12 Venus . . . N.P. • • 7.0 20.0 33.5 47.0 23 46 20.21 —20.28 36.93 20.98 13(. W. C 13.0 26.0 39.5 2t 48 39.45 ± 0.00 14 Venus . . . N.P. 50.5 4.0 17.0 30.5 44.0 21 49 17.20 —20.38 37.75 20.38 156 W.C 46.0 59.5 . 21 50 59.39 ± 0.00 16 Venus . . . N.P. 10.5 24.0 37.0 50.5 4.0 21 51 37.20 -20.28 37.81 20.38 17 W. C 5.5 19.0 33.5 t 21 53 32.28 ± o.oo 18 Venus . . . N.P. 57.0 !0.0 23.5 37.0 21 54 10.31 —20.44 37.93 20 44 19c W. C . . 36.0 49.0 1.5 •21 55 48.84 ± 0.00 90 Venus . . . N.P. 1.5 14.5 23.0 41.0 54.5 21 56 27.90 —20.46 39.06 20.46 31 W.C 9.0 22.0 35.3 21 58 35.45 ± 0.00 32 Venus . . . N.P. 48.0 1.5 14.5 27.5 41.0 21 59 U.50 —20.58 39.05 20. S8 S3 W. C 9.0 22.0 35 5 34 Venus . . . N.P. 48.5 2.0 15.0 29.0 22 1 22.17 22 2 1.S6 i o.oo — 2U 02 39.79 20.62 95 li we.. . . 35.5 49.0 2.0 15.0 22 4 2.02 ± 0.00 86 Venus . . . N.P. 29.0 42.0 55.0 9.0 22 4 43.03 —20.70} 40.07 20.70} 27 we.. . . 52.0 5.0 i p e 88 Venus . . . N.P. 45.0 10. 0 58.0 32.0 11.5 25.5 - Object. A. B. C. D. E. An A<5 Air. Wet. £ 6 8. s. 6. 8. s. h. m. s. Rev. s. Rev. Inches. „ „ 2 1 Venus . . . N.P. 52.5 6.0 19.5 21 14 19.31 +2.33 28.042 65.6 55.5 2 W. C . . 57.5 . . 24.5 21 15 11.00 7.12J —51.69 — 4.79J Ther. att. 3 Venus . . . N.P. 41.5 54.8 8.2 f t 21 18 8.14 2.39 65°. 5 4 W. C . . 45.6 59.0 12.5 21 18 59.04 7.04J 50.90 4. <;.-.; Bar. red. to 32° F. 27.943 5 Venus . . . N.P. 25.2 38.5 52.0 . . 21 96 51.88 1.64 6 W. C. . ... 28.2 54.6 8.0 21 27 41.37 6 524 49.49 4 881 7 Venus . . . N.P. 12.9 26.2 39.5 21 29 39.51 u.t*cf 1.29 •*.u*-f 8 W. C 2.0 15.3 28.5 • • 21 30 28.58 6.21 49.07 4.92 9 Venus . . . N.P. 58.2 11.6 25.0 i , 21 32 24.91 1.17 10 W. C 47.0 0.5 13.6 21 33 13.68 6.10 48.77 4.93 11 Venus . , . N.P. 6.8 20.3 33.5 t 21 35 33.51 0.83 13 W. C 8.5 21.6 35.0 48.4 21 36 21.70 5.S6J 48.19 5.03J 13 a Venus . . . N.P. 3.4 16.8 30.3 21 38 30.14 0.79J 14 W. C 51.0 4.5 18.2 31.2 44.5 21 39 17.88 5.87 47.74 5.07J 15 a Venus . . . N.P. 37.6 51.3 4.5 21 41 4.44 0.75 16 W. C 35.5 38.8 52.2 5.5 18.8 21 41 52.16 5.82 47.72 5.07 17 a Venus . . . N.P. 7.8 21.2 34.6 % 21 43 34.51 0.72 18 W. C 55.0 8.3 21.6 35.0 48.4 21 44 21.66 5.79 47.15 5.07 19 a Venus . . . N.P. 1.0 14.5 27 6 21 46 27.68 0.77 20 w. t; 47.6 1.0 14.2 27.7 41.0 21 47 14.30 +5.85 —46.62 —5 08 AT SANTIAGO I)E CHILE. 225 OCTOBER •: ». 1S5O— Continued. No. lor reference. Object. Chronometer tinif of transit. Mean of wires Micr. Planet— Star. Thermometers A. 11. C. D. E. A a. Arf. Air. Wet. 8. 9. 8. s. «. 1). in. S. Rev. 1, Rev. Indies. D 0 21 23 23 24 25 26 •27 28 29 30 31 32 33 34 35 SB 37 38 39 40 41 42 43 44 45 « 47 48 49 50 51 52 13 54 55 56 57 58 59 60 61 i 61 c 63 H 65 66 Venus . . . N.P. W. C. 47.5 1.0 14.5 0.5 5.5 51.3 42.8 28.0 23.0 9.6 59.2 43.7 39.5 23.5 12. S 55.3 16.2 18.4 1.0 4.2 46.5 6.2 48.3 41.5 22.7 51.8 32.2 24.3 4.4 2.8 42.6 6.2 45.7 35.5 14.5 1.0 39.5 32.0 10.0 9.7 47.5 49.8 27.2 38.0 4.5 56.4 33.0 27.6 13.5 4.5 41.5 23.0 33.8 f 9.5 1-3.8 14.5 0.2 1.5 35.0 45.5 17.5 58.8 27.5 52.6 23.5 0.5 40.5 18.0 27.0 18.0 S5.0 36.5 10.5 50.2 23.3 26.3 28.0 13.5 15.0 49.3 59.0 31.2 9.5 12.5 41.0 6.2 36.8 14.0 53.8 31.5 0.2 21 49 14.31 21 50 0.34 21 53 5.43 21 53 51.22 21 54 42.74 21 55 28.14 SI 57 24. SI 21 58 9.72 21 59 59.01 22 0 43.68 22 2 39.38 22 3 23 40 22 5 12.74 23 5 56.40 22 7 16.21 23 8 59.10 22 11 18.28 22 12 1.15 23 14 4.21 22 14 46.75 23 17 5.91 22 17 48.23 22 22 41.33 23 23 22.70 22 25 51.54 22 23 32.28 22 28 24.14 22 29 4.40 22 31 2.71 23 31 43.66 22 34 6.18 22 34 45.63 22 37 35.48 22 38 14.33 22 40 0.81 22 40 39.48 22 42 31.81 23 43 10.08 22 45 9.71 22 45 47.40 22 47 50.08 22 48 27.20 22 50 27.88 22 51 4.75 22 52 56.31 ?3 53 33.10 +0.68 5.83 0.64 5.821 0.50 5.76 0.48 5.78 0.41 5.80J 0.29 5.67 0.19 5.68 0.17 5.62 0.041 +5.58 ±0.00 +5.57 —0.10 +5.44J 1.06 6.761 0.71 6.38 0.721 6.491 0.61 6.49 0.60 6.441 0.51 6.34} 0.42 6.331 0.33 6.241 0.29 6.25 0.381 6.30 0.21 6.211 0.161 +6.3-3 —46.03 45.74 45.10 44.91 44.67 44.02 43.66 42.89 42.87 42.54 42.32 41.32 40.74 40.26 39.95 39.45 38.85 38.67 33.27 37.69 37.13 36.87 —36.79 —5.15 5.181 5.26 5.30 5.391 5.38 5.49 5.45 5.531 5.57 5.541 5.701 5.67 5.77 5.88 5.841 5.731 5.911 5. 881 5.98 5.911 6.001 —6.051 28.012 Thrr. ntt. 65°. 5 Bar. red. to 33° P. 27.913 65.6 1 55.5 1 Venus . . . N.P. W. C Venus . . . N.P. W. C Venus . . . N.P. W. C 38.8 24.5 16.0 1.5 5S.O 43.0 32.3 17.0 12.5 56.5 46.0 53.2 37.8 P9.5 14.7 11.5 53.5 45.6 30.3 26.2 10.0 59.5 43.2 3.0 45.5 5.0 47.8 51.0 33.5 53.6 34.8 23.2 9.5 38.3 19.1 10.7 51.2 49.4 29.3 52.8 32.3 23.3 1.0 47.5 26.3 18.5 56.7 56.5 31.3 33.5 11.0 14.5 51.7 43.0 19.5 VHIIIIS . . . N.P. W. U Venus . . . N.P. VV. 0 Venus . . . N.P. VV. C Venus . . . N.P. W.C Venus . . . N.P. W. C 49.5 32.0 51.5 Venus . . . N.P. W. C 37.5 Venus . . . N.P. W. C 39.0 Venus . . , N.P. W. C 14.5 Venus . . . N.P. W. C 24.6 Venus . . . N.P. W. C 57.5 Venus . . . N.P. W. C Vr.nui . . . N.P. VV. C 36.0 39.6 Venus . . . N.P. W. C. 8.7 Venus . . . N.P. W. C 34.0 Venm . . . N.P. W. C 5.0 Venus . . . N.P. VV. C. . 43.0 Venus . . . N.P. W. C. . . 24.0 Venus . . . N.P. W. C 1.2 Venus . . . N.P. W.C 29.6 29 226 INFERIOR CONJUNCTION 'OF VENUS, 1850-51, OCTOBER 24, 185O— Continued. No. for reference. Object. Chronometer time of transit. .Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A I. i An. Wet. s. 1. 8. s. s. h. in. s. Rev. s. Eev. Inches. • • 67 68 69 70 71 72 d Venus . . . N.f. W. C 44.2 34.0 38 2 13.6 23.8 11. 3 47.5 51.5 26.8 35.5 11.2 0.5 40.2 14.0 53.7 38.5 22 55 11.03 23 55 47.33 22 0 51.48 2J 1 26.93 23 2 33.24 23 s 11.50 +2.96 9.03} 2.90 8.95 8.73J +8.81 -36.31 33.42 —35.25 — S.C4i 6.05 —6.07} 58.046 Th*r. alt- 63°. 8 Bar. rod. to 32° P. 27.951 6-1.4 54.0 Venus . . . N.P. W. C 24.8 Venus . . . N.P. \V. C 9.5 Remarks. Considerable haze around the horizon ; but the planet and star arc both greatly more steady than on any preceding night. The observation*, throughout, are as good as it is possible to make them on such an object, and in that position of the instrument. a Good observations. c Scarcely visible. 6 Tremulous. d Too dim to observe ; recorded 43.5s. at wire E. Results. h. r.i. s. Mean . . Thirty-six transits ... 23 9 18.16 h. in. m. s. Correction for chronometer at 22 9 . . . — 3 10.63 h. m. A f at 22 6 . . . . «. Rev. — 42.93 .... —5.480 Santiago fid. time N. P. . // . 0.06 i n . = 1 46.81 h. m. s. . 22 6 7.53 OCTOBER 25, 1S50. dl c Chronometer time of transit. Planet— Star. Bar Thermometers. 1 Object. A. B. C. D. E. A a. A I. Air. Wet. d s. 8. s. s. 8. h. m. E. Rev. m. s. Rev. Inches. • < 1 Venus . . . N.P. 30.6 44.0 57.5 10.8 24 3 21 29 57.44 — 0.76} 27.991 68.0 55.4 2a W. C 7.5 31.2 47.4 1.0 21 34 31.18 10.52} —4 36.74 +9.76 Thfr. att. 3 Venus . . . N.P. 57.6 10 6 24.2 37.5 51.0 21 37 24.18 1.99 1)8°. 0 4 W. 0 33.0 46.5 £9.8 13.0 25.5 21 41 59.76 11.56 4 35.58 9.57 Bar. r«-cl. to 32° F. 27.864 5 Venus . . . N.P. 53.6 7.1 20.5 33.6 47.4 21 45 20.44 2.35 (1 W. C 28.2 41.4 54.6 8.0 21.5 21 49 54.74 11.77} 4 34.30 9.42} 7 Venus . . . N.P. 33.2 46.6 0.0 13.4 26.7 21 51 59.98 2.30 8 W. 0. . . . 6.5 19.6 33 2 dfi 1 9 Venus . . . N.P. 17.5 30.8 44.3 40. 0 57.6 59.8 11.0 21 56 33.12 21 58 44.24 11.70 2.33} 4 33.14 9.40 10 W. C 50.0 3.4 16.8 30.0 43.4 22 3 16.72 11.81} 4 32.48 9.48 11 Venus . • . N.P. 29.5 43.2 56.6 9.6 23.3 22 5 56.44 0.13 12 w. c 1.0 14.2 27.6 41.0 51.5 22 10 27.66 9.38} 4 31.23 9.25} 13 Venus . . . N.P. 1.0 14.3 27.7 40.8 54.4 22 13 27.64 0.61} 14 W. C 31.2 44.6 57.7 11.0 24.6 22 17 57.82 —9.71 4 30.12 9.09} 15 Venus . . . N.P. 58.5 12.0 25.2 38.5 51.6 22 20 25.16 42.61} 16 W. C 27.5 41.0 54.5 7.5 21.0 22 24 54.30 —6.46} 4 29.14 9.08 17 Venus . . . N.P. 58.5 11.0 25.2 38.5 52.0 22 28 25.14 +5.61} 18 W. C 39.9 53.0 6.2 19.6 22 33 52.99 —3.41 -4 27.85 +9.0D.} AT SANTIAGO DE CHILE. 227 OCTOBER 35, 1850— Continued. A u Chronometer lime oftraiiMt. Mir>|. Planet— Star. 1 Rlr 'iicrntoinetere. "5 Object. A. B. C. I). E. icr. A a. Ad. tiar. Air. Wet. S 6 s. 8. 8. 8. B. h. m. s. Krr. m. s. Rev. Indies. a . 55 19 Venus . . . N.P. 5.3 19.0 32.3 45.5 59.0 22 35 32.26 +5.65 28.013 CO. 7 53.8 20 W. C. . . • . . 32.3 43.8 59.2 12.5 23.8 23 39 59.12 —3.28 -4 23.85 +8.93 Th"r. ntt. •Jl Venus . . . N P. 24.5 37.6 51.2 4.5 18.2 52 41 51.20 +6.02 64". 5 g2 we ... 50.5 3.5 17.1 30.3 43.6 23 46 17.00 — 2.771 4 23.80 8.791 iar. K-il. 27.917' 23 V.-mi-i . . . N.P. H.I 13.3 25.5 38.8 52.4 23 43 23.50 +5.85 24 \V. C 23.5 37.0 50.5 3.5 IV. 0 22 52 50.30 —2.811 4 24.80 8.061 25 Venus . . . N.P. 27.5 41.0 54.5 7.7 21.0 22 54 54.34 +5. 59J 26 \V. o 51.5 5.3 18.5 31.8 43.0 22 59 18.42 —3.10 4 21.08 8.691 27 Venus . . . N.P. 1.5 15.0 28.5 41.8 53.3 23 1 28.42 +5.431 ^ 28 we.... 2-1.6 38.2 51.5 4.6 18.2 23 5 51 .42 —3.13 4 23 00 B.591 29c VIMIIIS . . . N.P. 15.5 28.8 42.0 5-1.5 9.0 23 7 43.10 +5.231 30 W. C 37.5 51.0 4.5 17.5 31.0 23 12 4.30 —3.31 4 22.14 8.571 n Venus . . . N.P. 2.5 16.0 29.2 43.8 56.3 23 14 29.33 +5.08 33 W. C 23.5 50.5 i.a 17.3 23 18 50.43 —3.32 4 21.07 8.40 33 Venus . . N.P. 29.5 42.5 55.0 9.5 23 20 42.69 +4.68 34 d W. C 33.0 49.5 3.0 16.0 29.5 23 25 2.60 —3.61 4 20.11 8.29 33 Venus . . . N.P. 38.2 51.5 5.0 18.5 .12.0 23 27 5.01 +4.311 38 \V. C 57.5 10.8 21.4 37.5 51.2 23 31 24.28 —3.97 4 19.24 8.28} 37 VPIHIS . . . N.P. 11.0 24.6 se.a 51.5 4.8 23 33 38.03 +3.76 33 we. ... 42.5 56.3 9.3 23.0 23 37 56.09 — 4.51J 4 18.07 8.271 39 Viinus . . . N.P. 39.5 53.0 6.4 20.2 33.4 23 40 6.50 +2.621 40 W. C 56.8 10.2 23.5 37.0 50.2 23 44 23.54 —5.49 4 17.01 8.111 41 Venus ... N.P 0.5 14.0 27.5 tt.e 54.5 23 46 27.46 +1.45* 42 W. C 16.5 30.1 43.5 (.7.5 10.5 23 50 43.63 —6.56 —4 16.10 +8.011 Remarks. Night favorable. The star is certainly not of more than the 7th magnitude, and was completely lost in the hazs after 234. 50m. «id. time. Thero is evidently an error of 2m. in its A. R. Measures generally fair. a Recorded 57. 5i. nt wire A. 6 Rather too close. a Tremulous — a little op'-'n. i? A little close. Results. h. m. s. Mean . . Twenty-one transits . . 234011.60 h. m. m. s. Correction for chronometer at 22 40 . . . —312.49 ti. in. A ft at 23 £5 m. •. Rev. -4 28.14 . . . +8.844 Santiago fid. time N. P. n . o.n / n = 2.W.37 h. m. a. 22 33 59.11 228 INFERIOR CONJUNCTION OF VENUS, 1850-51, OCTOBER 30, 185O. No. for reference. Object. Chronometer time of transit. Mean of \vin-s. Micr. Planet— Star. Bar. Thermometers. A. B. 0. D. E. A a. A<5. Air. Wet. f 8, s. s. s. ' b. in. s. Rev. ra. s. Rev. Inches. ' • 1 2 3 4 g 6 7 8 9 10 11 12 13 14 15 16 17 18 19 30 SI 22 S3 24 25a 26 27 28 29 30 i 31 32 33 34 35 _36 37 38 39c « 41 42 43 41 45 46 Venus . . . N.P. w. c 33.0 46.2 49.5 16.0 45.0 47.5 19.4 21.2 13.7 14.7 19.3 20.2 20.5 21.0 25.0 25.2 14.2 13.5" 2.6 1.5 56.0 54.6 19.5 17.5 17.3 14.8 50.7 47.6 31.0 27.2 50.5 46.2 15.5 11.2 43.5 38.5 25.5 20.0 33.5 26.6 59.0 5.5 58.2 47.5 39.5 59.6 3.0 29.2 33.2 58.8 0.5 32.5 34.3 27.0 28.3 32.5 33.6 31.3 34.5 38.3 38.5 27.6 26.5 16.3 15.0 9.4 7.7 32.8 30.7 30.6 28.0 4.0 1.0 44 _5 41.0 3.7 59.5 28.8 21.5 56.8 52.0 38.8 33.4 47.0 19.5 12.3 19.0 11.0 0.8 52.5 26.5 16.3 42.5 45.3 11.8 14.2 48.0 47.6 40.3 41.2 46.0 46.8 47.5 47.8 51.5 51.7 40.8 29.5 28.0 22.8 21.0 46.3 44.0 43.5 41.5 17.5 14.3 57.6 54.5 17.1 12.8 42.3 37.7 10.3 5.0 52.5 47.0 0.3 53.5 33.0 25.5 32.3 24.5 14.3 6.6 23.5 29.5 1.0 54.6 0.5 1.3 5.3 53.5 41.7 34.5 57.5 55.2 27.6 8.0 36.3 51.0 0.0 6.8 39.0 37.8 19.2 21 33 59.62 21 35 2.89 21 37 29.22 21 38 32.12 21 40 58.64 21 42 0.72 21 44 32.64 21 45 34.34 21 48 26.93 21 49 28.03 21 51 32.54 21 52 33.58 21 54 34.07 21 55 34.42 21 57 38.24 21 58 38.44 22 1 27.41 23 2 28.69 22 5 16.14 22 6 14.87 22 8 9.37 22 9 7.80 22 11 32.82 22 12 30.74 22 14 30.47 22 15 28.14 22 18 4.01 22 19 0.94 22 21 44.37 22 22 40.99 23 23 3.89 22 25 59.46 22 28 28.72 22 29 24.42 22 31 56.94 22 32 51.84 22 35 38.79 22 36 33.42 22 42 46.92 22 43 40.06 22 46 19.47 22 47 12.27 22 49 18.87 22 50 11.19 32 54 0.82 22 54 52.77 — 1.24 10.13J 1.181 10.37 1.17 10.41 1.09} 10.40 1.05} 10.40 1.03 10.53 1.07} 10.48} 0.99} 10.53} 1.06} 10.50} 1.02 10.58$ 1.03 10.56} 0.951 10.52 0.90 10.52 1.18 10.81 0.94} 10.64} 0.90} 10.58} 1.91} 11.06} 1.23} 11.13 1.24} 11.12 1.42} 11.27} 1.S8 11.27 1.31 11.33} 1.71 —11.91 —1 3.27 1 2.90 1 2.08 1 1.70 1 1.04 1 1.04 1 0.35 1 0.20 59.25 £8.73 58.43 57.92 57.67 56.90 56.62 55.57 55.70 54.90 54.63 53.14 52.80 53.33 —51.95 +9.101 9.18} 9.24 9.30} 9.34} 9.45 9.41 9.54 9.41 9.56} 9.54} 9.56} 9.62 9.63 9.70 9.68 9.85 9.89} 9.87} 9.85 9.89 10.02} +10.20 27.960 Thnr.Rtt. 6>°.8 Hiir. red. to 33° F. 27.854 67.0 56.5 Venus . . . N.P. W. C Verms . . . N.P. W. C Venus . . . N.P. W. C. . . 2.5 5.5 33.3 34.0 6.0 7.6 0.2 Venus . . . N.P. w. c Venus . . . N.P. W. C. ... 5.7 6.8 7.3 7.5 11.5 11.5 0.5 49.5 Venus . . . N.P. W. C Venus . . . N.P. W. C Venus , . . N.P. W. C Venus . . . N.P. W. C. . Venus . . . N.P. W. C Venus . . . N.P. W. C 42.6 41.2 6.0 Venus . . . N.P. W. C. . . . 1.2 37.3 Venus . . . N.P. W. C. . . Venus . . . N.P. W. C 17.7 Venus . . . N.P. w. c. . . •; . . Venus . . . N.P. W.C 37.6 32.5 1.6 Venus . . . N.P. W. C. ... 30.5 Venus . . . N.P. W. C 12.0 Venus . . . N.P. W. C Venus . . . N.P. W.C 20.2 55.5 Venus . . . N.P. W. C 52.0 Venus . . . N.P. W.C 34.0 AT SANTIAGO UE CHILE. f29 OCTOBER 26, 185O-Conttnned. , V 6 Chronometer time of transit. Planet— Star. Thermometers. i £ Object. A. B. o. U. E. A a. Ad. Air. Wet. 1 I s. s. s. s. •» h. in. s. Rev. B. Rev. Inches. O O 47 Venus . . . N.P. 28.5 42.3 55.5 8.5 22.4 22 57 55.44 - 1.65 27.962 61.0 53.1 48* w. c. . . 46.8 0.0 22 58 46 74 11 501 51 30 4-9 85i Ther. BU. 49 Venus . . . N.P. 35.2 1.8 15.3 23 0 1.89 1.531 64°. 5 50 W. C 39.4 53.5 6.0 19.5 33 0 52.67 11.70 50.78 10.161 Bar. red. to 32° F. 27.SB6 SI Venus . . . N.P. 35.3 48.8 2.3 15.5 . . 23 3 2.14 1.521 52 W. C. . 39 3 52.4 5 5 19 0 23 3 52 36 11 75 50 22 10 221 S3* Venus . . . N.P. 8.5 29.2 35.5 49.0 23 5 35.47 1.41 54 W. C 12.0 25.2 38.5 53 6 25.24 — 11.61 -49.77 +10.20 Remarks. Hazy throughout the evening. Planet well defined, but star dim, and the measures only fair. Tbe difference in A. R., from that given in the Ephemeris, same as last night. a Recorded 58.6s. at wire A. d Cirri. b Recorded 41,5s. at wire C. . c Interrupted by clouds* c Tremulous. Results. h. m. s. Mean . . Twenty-seven transiis . . 22 20 0.22 h. m. m. s. Correction for chronometer at 22 20 . . . — 314.15 h. m. A p at 22 17 . . . s. -56.71 rev. + 9.683 Santiago rid. time N. P. . it . 0.10 . = 8.79 h. m. s. . 22 16 46.07 OCTOBER 87, 1850. Night overcast. OCTOBER 28, 185O. The night was wholly overcast. OCTOBER 29, 185O. to Chronometer time of transit. Planet — Star. Thermometers. c \T f Micr £ S h Object. A. B. C. D. E. A a. Ai. Air. Wet. 6 8. s. 8. 6. h. m. s. Rev. in. s. Rev. Inches. • • Z la W. C 40.3 53.5 7.0 30.2 33.5 21 48 6.90 — 13.261 28.244 52.5 46.0 2 Venus . . . N.P. 13.5 87. 0 40.4 53.8 7.0 21 51 40.34 + 16.80 -j-3 33.44 +30.0fi Tiler, ntt. 3 W. C 19.5 33.0 46.3 59.8 13.0 21 54 46.30 —12.921 59°. 7 4 Venus . . . N.P. 53.5 7.0 20.5 33.5 47.0 21 58 20.30 + 17.27J 3 34.00 30.20 Bar. red. to 32° F. P 28.161 5 W. C. . . 21.2 34.6 22 3 47.94 —12.80 6 Venus . . . N.P. 56.5 10.0 23.5 . . 50.5 23 6 23.45 +17.231 3 35.51 30.031 76 W. C 5.5 19.2 32.5 59.5 23 10 32.50 —13.10 8 Venus . . . N.P. 50.5 4.0 17.0 30.5 44.5 23 14 17.30 +16.38 3 44.80 29.48 9 W. C 22.2 35.5 49.0 3.0 16.0 23 17 48.94 —12.97 10 Venus . . . N.P. 7.8 21.2 35.0 48.3 1.7 23 31 34.80 +16.52 +3 45.88 +29.49 230 INFERIOR CONJUNCTION OF VENUS, 1850-51, OCTOBER 39, 185O— Continued. No. for reference. Object. Chronometer time of transit. .Mean of wires. Micr. Planet— Star. Bar. Thermometers A. n. C. D. E. A a. At, Air. Wet. s. 8. s. s. s. h. m. s. Rev. m. s. Rev. Inches. O O 11 12 13 14 W. C Venus . . . N.P. w. c 20.5 7.8 43.6 33.0 34 2 21.5 57.3 45.5 47.5 34.7 10.; 5 S9.0 1.0 48.3 24.0 !2.5 14.5 1.8 37.5 26.0 23 26 47.54 23 30 34.82 23 3H 10.58 23 36 59.00 — 11.S8 +17.41 —11.61 +17.68 +3 47.28 +3 48. -12 +29.39 +29.29 28.244 Ther. ntt 59s. 7 Bar. roil, to 32° P. 28.161 52.5 46.0 Venus . . . N.P. Remarks. Venn* appears like an image in a basin of agitated mercury, and is wholly impossible to measure with any degree of accuracy under a power of 150. Efforts were made with lower powers from 224. 6m. until 234. 10m. sill, time; but it was still found impracticable, a cold SE wind (from the Andes) evidently producing rapid changes in the refraction. n Recorded214 47m. 6.90s. i Recorded 234. 9m. 32.50j. Wrong star. Evidently the one on the map in A. R. 174. 13m. 20s. i Dec. — 27° 33' ±. Results. h. m. s. m. s. Rev. / /; Mean . . . First three transits . . . 21 58 48.03 + 3 34.33 . . . . +30.100 . ... =9 46.65 Mean . . . Last four transits . . . 23 25 51.48 + 3 46.59 . . . . +29.412 . ... =9 33.24 h. m. m. s. h. m. s. Correction for chronomelur at 21 59 . . . —3 17.87 Santiago sid. time N P 21 55 30.16 Correction for chronometer at 23 26 . — 3 17.90 Santiago sid. time N P 23 22 33 58 h. m. H h. m. // A p at 21 53 . . 0.24 A a at 23 31 . 0.80 OCTOBER 30, 185O. No. for reference. Object. Chronometer time of transit. Mean of wire*. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Rev. Air. Wet 9 s. I. 8. .. s. h. m. s. Rev. m. s. Inches. • 1 W.C 33.5 46.5 59.5 22 27 59.89 -11.74i 28.014 60.5 50.0 S Venus . . . N.P. 31.0 44.4 57.6 11.1 24.6 22 34 57.74 + 5.64 +6 57.85 +17.S8J 3 W. C 47.5 0.8 14.5 27.5 41.0 22 38 14.26 —12.64 Ther. nil 62°. 2 4 Venus . . . N.P. 46.5 0.0 13.2 39.5 40.0 22 45 13.24 + 5.07 6 58.98 17.71 li:ir red. to 32° F. 5 W.C 35.0 47.5 1.5 14.0 28.0 22 48 1.20 -12.5U 27.925 6a Venus . . . N.P. 35.0 48.5 1.5 15.5 28.8 22 55 1.86 + 5.10 7 0.66 17. 61J 7 W. C . 49.8 3.3 22 58 3.24 —1-2.45 8 Venus . . . N.P. 38.5 52.3 5.5 18.8 32.2 23 5 5.46 + 5.10 7 2.22 17.55 91 W.C 33.8 47.5 1.0 . 23 7 47.44 —12.83 10 Venus . . . N.P. 23.7 37.5 50.6 4.1 17.5 23 14 50.68 — 5.08 +7 3.24 + 17.89 Remarks. A beautiful night ; the planet w.0 23 32 27.92 7.97 6'j°.5 Bar. rtnl. 16 Venus . . . N.P. 21.5 35.0 48.5 2.0 15.5 23 41 48.50 9.18 9 20.58 1.21 to :«' F. 27.910 17 48 2 2 0 15 5 28 8 42 5 18 Venus . . . N.P. 10.5 24.0 33.0 51.5 5.0 23 54 37.80 +8.2J +9 22.40 +1.12 Remarks. Fine night. Planet steady and well-defined. It was subsequently ascertained that the proper comparing star follows the planet, and therefore the observations arc not comparable. a Recorded 22A. 10m. 58.20i. b Good measures. c Recorded 33.5s. at wire E. Good measures. d Tremulous. Results. li. in. s. Mean . . . Nine transits . . . . S3 2 11.53 h. m. m. s. Correction for chronometer at 23 2 . . — 3 20.14 m. a. Rev. + 9 15.40 .... +1.474 Santiago sid. time N. P. . . . h. m. n A p at 22 54 0.03 . =0 28.73 h. m. s. 22 58 51.39 NOVEMBER I, 1850. CJ c* Chronometer lime of transit. Planet— Star. Thermometers. £ Mean nf \ i i£ £ Object. A. B. C. D. E. An. &S. Air. Wet. S i s. 8. s. 8. s. h.ln.B. Rev. m. s. Rev. Inches. • • i Venus . . . N.P. 37.8 51.2 4.5 18.0 31.5 21 49 4.60 + 5.03} 27.954 73.0 58.5 3 LacMille . . 7371 15.5 29.0 43.2 53.8 9.4 31 51 43.38 —13.36 —2 37.78 +17.3C1 Tli^r, fttt. :),< Venus . . . N.P. 29.3 43.1 56.3 9.8 23.4 21 54 56.38 + 5.00 72°. 0 4 Lneaillc . . 7371 6.5 20.0 33.6 46.9 0.2 21 57 33.44 —19. Sty 2 37.06 17.351 lliir. T'-tl 27.845 So Venus . . N.P. 49.8 3.5 16.5 30.3 43.8 22 0 16.78 + 4.93J 64 Lacaille . . 7371 53.0 3D.5 53.0 6.5 | SO.O 22 0 53.00 -12.33 —2 38. -22 +17.321 INFERIOR CONJUNCTION OF VENUS, 1850-51, NOVEMBER 1, 1S50— Continued. aj Chronometer time of transit. Planet— Star. Thermometers. 1 Mean of wires. Micr. Bar. 1 <£ £ h. Objtct. A. B. C. D. E. Act. AS. Air. Wet. :ilitiii<-fl. Results. 233 h. m. f. Moan . Twpnty two transits . . . 23 44 30. D6 h. in. in. s. CorK'rtion for chronometer at 22 44 . — 3 22.48 li. in. A p at 22 42 . . . m. s. Ilf-v. -2 30.55 . . . . 4- 17.106 S;inti;i'_'o sid. time N. P. // . 0.19 t it . =5 33.40 h. in. s. . 22 41 8.48 NOVEMBER 3, 1850. A s Chronometer him: of transit. Micr. Pianet— Star. Thermometers 1 s Object. A. B. C. D. E. Ad. A I. Bar. Air. Wet. 1 1 9. S. s. s. 8. li. m. a. Rev. s. Rev. Inches. * 1 Lacaille . . 7371 5.2 18.5 32.0 . . f f 22 19 31.97 + 10.35 28.048 62.8 50.9 2 Venus . . . N.P. . . 50.5 4.0 17.5 31.4 22 20 4.14 0.70 +32.17 —9.65 3 Lacaille . . 7371 17.1 30.5 . . 22 23 43.91 10.53 Tlier. alt 65°. 5 4 Venus . . . N.P. 3.0 16.5 -211.5 43.5 S2 24 16.41 0.54 32.50 9.M Bar. red. to 32° P. 27.949 5 Lacaille . . 7371 20.7 31.2 22 26 47.56 13.90 6 Venus . . . N.P. . . 7.2 20.5 34.2 47.8 22 27 20.71 3.es 33.15 10.02 7 Lacaille . . 7371 51.0 4.5 22 30 17.86 13.73 8 Venus . . . N.P. 37.6 51.2 4.5 18.5 22 30 51.24 3.80 33.38 9.95 9 Lni-aille . . 7371 18.8 32.5 46.0 22 32 45.83 13.82 10 Venus . . . N.P. 6.2 19.5 33.0 46.7 22 33 19.64 3.86 33.81 9.96 11 Lacaillc . . 7371 47.5 1.0 14.5 22 35 14.40 13.84 12 Venus . . . N.P. 34.5 48.0 1.5 15.6 22 35 48.19 3.83 33.79 10.01 13" Lacaille . . 7371 17.7 31.2 44.7 22 37 44.60 13.73J 14 Venus . . . N.P. 5.5 19.1 32.5 46.2 23 38 19.11 3.80 34.51 9.93J 15 Lacaille . . 7371 46.3 59.7 13.0 22 40 13.07 13.73 16 Venus . . . N.P. 34.8 48.0 1.5 15.0 23 40 48.11 3.si; 35.04 9.881 176 Lacaillc . . 7371 15.6 29.0 42.5 . > 22 42 42.43 13.69 18 Venus . . . N.P. 4.5 17.8 31.0 44.6 22 43 17.76 3.85 35.33 9.84 19 Lacaille . . 7371 16.8 30.4 43.8 22 45 43.73 13.75J 20 Venus . . . N.P. • • 6.5 19.5 32.8 46.5 22 46 19.61 3.83J 35.88 9.92 21 Lacaille . . 7371 14.8 28.1 41.5 . , . . 22 48 41.53 13.63 22 Venus . . . N P. 3.8 17.2 30.8 44.3 22 49 17.31 3 7^1 35.78 Q Q(H 23 c Lacaille . . 7371 43.5 . 57.0 10.3 22 51 10.33 13.61 24 Venus . . . N.P. 33.0 46.5 0.0 13.5 22 51 46.54 3.68 36.21 9.93 25 Lacaillc . . 7371 26.2 39.6 53.0 22 53 53.00 13.59 26 Venus . . . N.P. 16.0 29.5 43.0 56.5 22 54 29.54 3.73 36.54 9.86 27 Lacaille . . 7371 9.0 22.5 36.0 22 56 35.90 13.56J 28 S .'mis . . . N.P. 59.2 12.7 26.0 39.7 22 57 12.69 3.60 33.79 9.96J 29 Lacaille . . 7371 31.4 44.8 58.1 . . 22 59 58.17 13.49i 30 Venus . . . N.P. . . 22.6 35.5 48.8 2.5 23 0 35.64 3.61 37.47 9.88* 31 Lacaille . . 7371 7.5 20.8 34.5 . . . . 23 2 34.33 13.46J 32 Venus . . . N.P. 58.5 12.0 25. 5 39.1 23 3 12.00 3.63 37,73 9.83} 33 Ln.-ailli! . . 7371 41.0 54.3 7.8 ;.. . . 23 5 7.77 13.49 34 Venn. . . . N.P. 33.1 45.7 59.0 12.8 23 5 45.69 3.63 37.92 9.88 35 Lacaille . . 7371 15.1 28.5 42.0 f . 23 7 41.93 13.39 36 Venus . . . N.P. • • 6.6 20.3 33.6 47.5 23 8 20.29 +3.5H +38.36 — 9.841 30 ' 234 INFERIOR CONJUNCTION OF VENUS, 1850—51, NOVEMBER 3, 1850— Continued. £ Chronometer time of transit. | Planet— Star. Thermometers. Micr Bar. i Object. A. B. 0. D. E. A a. A S. Air. Wet. ,0 t s s. s. s. 8. h. nt. s. Rev. 8. Rev. Inches. B 0 Is 37 Lacaillc . . 7371 2.0 15.3 29.0 23 10 28.83 +13.471 28.048 62.8 50.9 38 Venus . . . N.P. 51.5 7.8 21,0 34.5 23 11 7.74 3.55 +38.91 —9.92; Tlicr. alt. S9 Lacnille . . 7371 39.2 52.6 6.0 t ( t 23 13 G.OO 13.36 65°. 5 40 Venus . . . N.P. 32.1 45.0 58.5 12.1 23 13 45 21 3.58 39.21 9.78 Bar red. to 32° F. 27.949 41 Lacaille . . 7371 9.5 23.1 36.6 23 15 36.47 13.43 42 Venus . . . N.P. 3.1 16.0 29.5 43.2 23 16 16.24 3.60 39.77 9. S3 43 Lacaille . . 7371 42.5 55.8 9.3 23 18 9.27 13.33J 44 Venus . . . N.P. • • 35.5 48.8 2.4 16.0 23 18 48.96 3.551 39.69 9.78 45 Lacaille . . 7371 £6.5 S9.8 53.5 . _ ( 23 20 53.33 13.39 46 Venus . . . N.P. 20.0 33.0 46.6 0.2 23 21 33.24 3.56 39.91 9.83 47 Lacaille . , 7371 2.5 16.0 29.5 93 £3 29.40 13.35 48 Venus . . . N.P. 56.5 9.6 £3.2 36.8 23 24 9.81 3.53 40.41 9.82 49 Laeaille . . 7371 38.0 51.5 4.5 23 26 4.73 13.421 50 Venus . . . N.P. 32.0 45.5 59.1 12.6 23 26 45.59 3.57J 40.85 9.85 51 Lacaillc . . 7371 24.0 37.2 50.6 . 23 28 50.07 13.35 52 Venus . . . N.P. 18.5 31.8 45.3 58.8 23 S9 31.89 3.49 41.22 9.86 53 Lacaille . . 7371 57.5 11.0 24. 5 t 23 31 24.40 13.381 54 Venus . . . N.P. 38.5 52.5 6.0 19.5 33.2 23 32 5.94 3.58 41.54 9.80J 55 Lacaille . . 7371 49.7 35 16.8 . 23 34 16. 73 13.52 56 Venus . . . N.P. 31.2 44.5 58.5 12.0 25.5 23 34 58.34 3.74 41.61 9.78 57 58 Lacaille . . 7371 Venus . . . N.P. 20.5 2.0 33.8 15.5 47.4 29.4 43.0 56.5 23 36 47.30 23 37 29.28 13.57 3.77 41.98 9.80 28.072 53.0 47.6 59 Lacaillc . . 7371 2.6 16.0 29.5 23 39 29.43 13.59 Tlier. alt. 60 Veiius . . . N.P. . . 58.5 11.6 25.3 38.7 23 40 11.81 3.83J 42.33 9.75J 62° . 0 Gar. red. to 32° P. 61 Lacaille . . 7371 50.5 3.5 17.5 23 42 17.23 13.69J 27.983 62 Venus . . . N.P. 32.6 47.0 0.5 14.0 27.5 23 43 0.32 + 3.90 +43.09 — 9.79J Remarks. After the third differential the cirri passed away, and both plaint and star were well denned and steady until the last measures. The first obner- vaiion was made through clouds, and is not reliable ; the others are generally very fair. 0 Clear' » Beautiful. c A little open. Results. Mean . . . Thirty-one transits . h. m. Correction for chronometer at 23 3 . li. in. s. S3 236.10 in. s. — 3 24.81 h. m. •• Rev. + 37.64 .... —9.866 Santiago sid. time N. P ' H =312.29 li. in. s. 225911.28 A pat 22 59 01:i NOVEMBER 3, 1S5O. Cloudy. AT SANTIAGO DE CHILE. 235 NOVEMBER *, 185O. V i Chronometer time of transit. Planet— Star. Thermometers. n Object. A. B. C. D. E. A a. Bar* A,!. Air. Wet. s i d 6 2 s. S. 8. 8. 8. h. m. ». Rev. m. s. Kev. Inches. • • 1 : Lacaille . . 7371 4.5 18.2 31.5 43.0 : 58.5 21 53 31.54 -7.76J 28.026 64.0 : 54.3 2 Venus . . . N.P. 31.0 44.5 57.8 11.4 25.0 21 59 57.94 7.53i +6 26.40 +0.23 Ther. att. 3 Lacaille . . 7371 57.2 10.8 24.2 37.6 51.0 22 4 24.16 8.39 64°. 1 4 Venus . . . N.P. 24.6 38.2 51.7 5.2 18.6 22 10 51.66 8. 15} 6 27.50 n „.,. Bar. red. °'2J* to 32° P. 27.931 5 Lacaillc . . 7371 59.4 13.2 26.8 39.9 53.0 23 13 26.46 8.0-2 6 a Venus . . . N.P. 27.5 41.0 £4.9 8.0 21.6 23 19 54.70 7.80J 6 28.24 0.21J 7 Lacaille . . 7371 21.3 37.5 • 51.2 4.7 18.3 22 21 51.20 7.871 8 Venus . . . N.P. 54.0 7.5 21.0 34.2 47.6 2! 28 20.60 7.64 6 29.60 0.23J 9 Lacaille . . 7371 56.7 10.5 23.5 37.3 .51.0 22 30 23.80 7.79 10 Venus . . . N P. 27.5 41.0 54.7 8.0 21.5 22 36 31.54 7.55 6 30.74 0.24 11 Lacaille . . 7371 15.5 28.5 42.0 i 53.5 9.1 22 38 42.14 7.77 136 Vi'iiin . . . N.P. 47.0 0.3 13.8 27.0 40.7 22 45 13.76 7.52J 631.62 II. 2 1; 13c Lacaille . . 7371 47.5 0.6 14.0 27.5 41.3 22 47 14.18 7.73J 28.040 53.0 49.1 14 Venus . . . N.P. 19.8 33.5 46.7 0.2 13.6 22 53 46.76 7.43i 6 3-2.58 0.30 Ther. att. 15 Lacaille . . 7371 3.5 17.0 30.5 44.0 ! 57.5 22 58 30.50 7.89i 60°.0 16 rf Venus . . . N.P. 37.5 50.5 4.4 17. B 31.5 •23 5 4.34 7.59J 6 3384 n „„ Bar. red. °-30 to 32° F. 27.957 17 Lacnille . . 7371 51.5 5.0 18.6 31.9 ; 45.4 23 7 18.48 7.85 18 c Venus . . . N.P. 26.5 39.8 53.2 6.5 20.2 23 13 53.24 —7.65 +6 34.76 +0.20 Remarks. Night clear. The planet being flaring and unsteady, put on the cap with an aperture oi'4 inches. This permitted the first six measures to be made very wHI. a A little blurred. d Very difficult to observe. A Blurred and tremulous. e Too tremulous, c Both objects blurred and tremulous. Results. h* in. s. m. s. Rev. / // Mean . . . . Nine transit* .... 22 37 6.42 + 6 30.59 . . . . +0.244 . . . . =0 4.76 h. m. in. s. h. m. 8. Correction for chronometer at 22 37 . . — 3 29.08 Santiago sid. time N. P . . 22 33 37.34 h . m. H A p at 22 30 0.00 NOVEMBER 5, 1850. Cloudy. NOVEMBER O, 185O. fi Chronometer time of transit. Planet — Star. Thermometers. e 1 h Object. A. B. C. D. E. A a. A j. Air. Wet. i s. s. s. s. s. h. m. 8. Rev. m. s. Rev. Inches. • • i Venus . . . N.P 53.0 6.5 19.5 33.5 47.0 22 6 19.90 — 3.36 28.006 SK.7 53.0 2 W. C 58.0 12.5 26.0 39.2 52.8 32 9 25.80 12.34J —3 5.90 +8.98J Ther. att. 3 Venus . . . N.P. 9.2 22.5 36.0 49.5 2.8 22 12 36.00 4.03 68°. 9 Bar. red. 4 W. C 14.0 27.5 41.0 54.5 7.2 22 15 40.84 — 12.92J —3 4.84 +8.89J to 32° P. ! 27.896 236 INFERIOR CONJUNCTION OF VENUS, 1850-51, NOVEMBER. 6, 185O— Continued. a; Chronometer lime of transit. Planet— Star. Thermometers. D I Mean of wires Micr. Bar. m T k Object. A B. C. D. E. A a. d(J. Air. Wet. a 6 8. 6. s. s. 8, ll. 1)1. S. Hev. 111. S. Kev. Inches. 0 0 2 5 Venus . . . N.P. 46.0 | 58 7 13.1 26.4 -10.3 2-! 22 12.94 —3. in; 28.005 54.5 50.9 6 W. C 50.5 . . 16.5 30.0 41.0 22 25 16.89 12.01 —3 3.95 +8.874 Tlier. att. 7 Venus ... N.P 39.7 52.5 6.2 19.8 33.3 22 28 B.'M 2.941 62°. 0 8 W. C 43.0 . . 9.5 23.2 36.7 22 31 9.74 11.89 3 3.44 HO,, Bar. reel. 8'94i to32°F. 27.916 9 Venus . . . N.P. 54.5 8.2 21.8 35.2 48.8 22 34 21.70 2.88 10 W. C 57.5 11.0 24.3 37.8 51.5 22 37 24.42 11.82 3 2.7J 8.94 11 Venus . . . N.P. 23.3 37.0 50.5 3.5 17.5 22 39 50.36 2.69 12 W. C 25.5 39. 0 {2.5 6.0 19.5 22 42 52.50 11.63 3 2.14 8.94 13 Venus . . . N.P. 15.5 29.8 42.5 56.0 9.7 22 46 42.70 2. CO 14 W. C 17.1 30.6 44.0 57.0 10.8 22 49 43.90 n.eoi 3 1.20 9.00J 15 Venus . . . N.P. 49.5 3.0 16.5 29.9 43.5 2-3 53 16.48 2 44 16 W. C 50.0 3.5 16.8 30.2 43.8 22 56 16.86 11.34 3 0.38 8.90 17 Venus . . . N.P. 55.5 8.6 23.0 35.5 49.5 22 58 22.22 2.29J 18 W. C. . . 55.5 R 5 22.2 35.5 49.0 23 1 22.14 11.29 2 f/9.92 8. 99J 19 Venus . . . N.P. 11.5 25.0 33.8 52.1 5.8 S3 3 38.64 2.24 20a W. C. . . . . . 11.2 24.6 38.0 51.5 5.0 23 6 38.06 11.234 2 59.42 8. 99'- 21 Venus . . . N.P. 15.0 28.5 42.0 55.5 9.0 23 8 42.00 2.11 22 W.C. . 14.5 27.5 41.0 54.6 8.0 23 11 41.12 1 1 06 2 59 12 8.95 23 Venus . . . N.P. 2.0 15.7 29.0 42.5 56.0 23 14 29.04 3.19 24 W.C .... 0.5 13.7 27.0 40.3 54.0 23 17 27.14 12. 18 2 58 10 8.99 25 Venus . . . N.P. 1.5 15.5 23. 5 42.3 55.5 23 19 28.66 3.20 26 W.C 59.3 26.2 39.7 53.3 23 22 26.26 12.25 2 57.60 9.05 27 Venus . . . N.P. 10.5 24.2 37.5 51.2 4.5 23 24 37.58 3.13 28 W.C 7.8 21.0 34.6 48.0 | 1.5 23 27 34.58 12.11 2 57.00 8.98 29 Venus . . . N.P. 9 0 22.5 35.8 49.5 3.2 23 29 36.00 3.1-ti 30 W.C 5.5 19.0 32.3 45.9 59.5 23 32 32.44 J2.Q3 2 55.44 9. 08J 31 Venus . . . N.P. 22.2 as. 6 49.2 2.6 16.0 23 31 49.12 3.154 32 W. C 18.2 31.5 45.0 58.5 12.0 23 37 45.04 12.15 2 55.92 8.894 336 Venus . . . N.P. 17.2 30.5 44.3 57.8 11.5 23 3944.26 3.11 34 W. C 12.8 26.2 39.5 53.0 6.5 23 42 39.60 12.14 2 55.34 9.03 356 Venus . . . N.P. 1.5 15.2 28.5 42.0 56.0 23 45 28.64 3.58 36 W.C 56.5 9.6 23.5 36.5 50.5 33 48 23.32 13.59 2 54.68 9.01 37J Venus . . . N.P. 24.3 37.5 51.3 4.8 18.5 23 50 51.28 2.60 33 W.C 18.5 32.0 45.5 59.0 12.6 23 53 45.52 —11.57 —2 54.24 +8.97 Remarks. The night has been extremely fovorablc-a clear atmosphere without wind. Both objects c.vccedingly sharp and steady. The first two measures were made by daylight, 2nd the first sixteen were considered very good. a Recorded 12.2s. at wire A. /, Tremulous. Results. li. m. s. Mean . . . Nineteen transits . . . 23 1 44.89 li. in. in. s. Correction for chronometer at 23 2. . . —333.10 li. m. A pat 23 0 . . . m s. Rev. — 2 S9.59 .... +8.97G Santiago sid. lime N. p. 0.07 . =2 54.94 li. m. s. 22 58 11.79 AT SANTIAGO DE CHILE. 237 NOVEMBER 1, 1850. 1 Chronometer time of transit. Micr. Planet— Star. Hur Thermometers. S. s Object. A. B. C. D. E. A a. A i. Air. Wet. s £ 1 S. 8. 3. s. 8. h. in. s. Rev. 8. Rev. Inches. O O 1 Vrnus . . . N.P. 24.2 . , 4.7 22 31 37.71 ±0. i 28.063 60.8 53.4 2 W. C. 47 a 27.5 22 35 0.75 —9.65$ —23.04 +9.65J Thor. att 3 Vl'llHS . . . N.P. 31.0 44.8 . . 25.0 22 37 58.04 ±0.00 61°. 5 4 W. C 54.5 7.5 34. 3 48.0 22 38 21.07 —9.6.".; 23.03 9.65$ Iliir. rr,l to 32° P 27.975 5 Vi'ims . . . N.P. 18.5 SQ.O . . 12.6 23 41 45.48 ±0.00 6 \V. C 41.5 54.6 • • 21.5 34.5 22 42 7.95 —9.65$ 23.47 9.6;$ 7 Venus . . . N.I'. 18.2 31.5 ,• . . 12.2 22 4) 45.03 ±0.00 B W. C 40.7 54.2 20.6 34.0 82 45 7.32 — 9.60$ 22.24 9.60$ 9 Vfiiun . . . N.P. 43.6 57.0 . . 37.5 22 47 10.48 ±0.00 10 w.c • • 19.2 • • 46.0 59.2 22 47 32.:,! —9.60$ S2.03 9.60$ 11 Venus . . . N.P. 57.0 10.5 . 51.2 22 55 24.01 ±0.00 13 W.C 18.5 31.8 • • • • 11.9 22 55 45.18 — 9.60$ 21.17 9.60$ 13 Venus . . . N.P. 41.2 54.6 35.2 22 58 8.11 ±0.00 14 W. C. . . . 15 6 55.6 22 £8 28.85 — 9.64 20 74 9.64 15 Vi'nns . . . N.P. 3.5 17.5 58.0 23 1 30.78 ±0.00 16 W.C 24.5 38.0 51.5 18.3 23 1 51.40 —9.65 20.62 9.63 17 Venus . . . N.P. 0.5 14.5 27.5 41.5 55.0 23 4 27.80 ±0.00 18 W. C 1.5 14.5 23 4 47.83 — 9.65 20.06 9.65 19 Venus . . . N.P. 52.0 5.0 46.0 S3 9 J8.77 ±0.00 20 W. C. . . 85 5 5.5 23 9 38.75 9.65 19 98 9.65 21 Venus . . . N.P. 25.0 38.8 53.2 23 11 52.08 ±0.00 22 W.C. . 11.5 25.0 37.5 23 12 11.24 — 9.62$ 19.16 9.62i 23 Venus . . . N.P. 43.5 57.0 10.5 23 16 10.41 ±0.00 24 W. C. . 29.5 43.0 56.4 23 16 29.54 — 9.64$ 19.13 9 . 64 ' 25 Venus . . . N.P. 50.7 4.3 17.5 23 18 17.58 ±0.00 26 W. C. . 36, 5 49.8 3.2 23 18 36.40 9.64$ 18.82 9R41 27 a Wiius . . , N.P. 56.5 9.6 22.8 23 20 23.04 ±0.00 •*"t 28 W. C. . . . 41.5 55.5 9.2 23 20 41.97 9.68 18.93 9 68 29 Venus . . . N.P. 14.0 27.5 40.8 23 22 40.81 ±0.00 28.000 57.0 51.2 30 W.C 59.8 12.8 26.0 23 22 59.41 g.68 18.60 9.68 31 Venus . . . N.P. 49.6 3.6 16.8 23 25 16.61 ±0.00 Ther. att. 62°. 5 33 W. C. . . 34.8 48.0 1.8 23 25 34.77 9.68 18.16 9.68 o 32° P! 33 Venus . . . N.P. 6.5 20.1 33.5 . . . 23 27 33.44 ±0.00 27.909 341 W. C. . ... 50.8 4.5 18.2 23 27 51.07 —9.68 -17.63 -1-9.68 Remarks. At no time durinalhe observations was the planet free from tremor; and the necessity of measuring it on the fixed wire (because of the sma difference in A. R.) rendered the observations somewhat uncertain : the measures are, therefore, considered only fair, a Recorded 23.8s. at wire C. b Recorded 51. St. at wire C. Results. h. m. s. Mean . . Seventeen transits . . 23 3 22.37 — 20.34 Rev. +9.647 h. in. Correction lor chronometer at 23 3 . in. s. . —335.32 h. m. A pal '-'3 0 II;;I£O sid. time N. P. // . 0.11 / n . =3 8.02 h. in. 8. 22 59 47.05 238 INFERIOR CONJUNCTION OF VENUS, 1850-51, NOVEMBER 8, 1850. | Chronometer time of transit. Micr. Planet— Star. Bar. Thermometers. I || Object. A. B. C. D. E. A a. A I. Air. Wet. s 6 s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. o • K 1 W. C 24.5 38.0 51.7 5.3 18.5 22 1851.60 —14.74 27.978 65.2 55.4 2 Venus . . . N.I'. 33.2 46.5 0.0 13.5 27.0 22 21 0.01 3.22 +2 8.44 +11.52 Ther. att. 3 W. C 29.8 43.0 55.5 9.8 23.5 22 23 56.52 14.67 62.°0 4 Venus . . . N.P. 38.2 51.9 5.4 18.6 32.5 22 26 5.32 3.13| 2 8.80 11.53J Bar. red. to 32° F. 27.889 5 W. C 20.5 33.8 47.0 0.5 14.3 22 30 47. 22 14.464 6 Venus . . . N P. 29.8 43.5 57.0 10.2 23.9 22 32 56.68 2.84} 2 9.66 11.62 7 W.C 51.0 4.5 17.8 31.0 44.6 22 35 17.78 14.37 8a Venus . . . N.P. 0.8 14.5 27.8 41.0 54.6 22 37 27.74 2.83 •2 9.96 11.54 9 Vf.C 40.5 54.3 7.5 21.0 34.5 22 40 7.56 14.28 in Venus . . . N.P. 51.5 5.0 18.5 31.8 45.6 22 42 18.48 2.68 2 10.93 11.60 11 W. C 11.8 25.2 38.5 52.0 5.5 22 44 38.60 14.22J 12 Venus . . . N.P. 22.5 36.5 49.8 3.0 16.8 22 46 49.72 2.62 2 11.12 11.604 13 W.C 34.8 48.1 1.4 14.8 28.5 22 49 1.53 14.10) ! 14 Venus . . . N.P. 46.2 59.5 13.3 28.8 40.3 22 51 13.22 2.54 2 11.70 11.564 15 W. C 5.5 19.0 32.3 46.0 59.5 22 53 32.46 14.10 16 Venus . . . N.P. 17.7 30.7 44.5 57.5 11.5 22 55 44.38 2.44 2 11.93 11.66 17 W. C 7.5 20.8 34.4 47.5 1.4 22 58 34.32 14.05 18 Venus . . . N.P. 20.0 33.4 46.8 0.5 14.0 23 0 46.94 2. 29 S 12.62 11.76 19 W.C 30.2 43.6 J6.8 10.5 24.0 23 2 57.02 13.98 20 Venus . . . N.P. 43.2 56.5 10.1 23.5 37.1 23 5 10.08 2.28 2 13.06 11.70 21 W.C 51.1 4.5 17.6 31.2 44.6 23 7 17.80 13.944 22 Venus . . . N.P. 4.5 17.8 31.5 45.0 58.4 23 9 31.44 2.234 2 13.64 11.71 23 W. C 10.6 24.0 37.3 51.0 4.5 23 11 37.48 13.83 24 Venus . . . N.P. 24.3 37.5 51.4 4.5 18.5 23 13 51.24 2.07 2 13.76 11.76 25 W. C 43.0 56.5 9.5 23.1 36.8 23 16 9.78 13.724 26 Venus . . . N.P. 57.3 10.8 24.0 37.5 51.5 23 18 24.22 2.00 2 14.44 11.721 27 W.C 18.0 31.5 44.6 58.2 12.0 23 20 44.86 13.704 28 Venus . . . N.P. 32.7 46.5 59.7 13.3 27.0 23 22 59.84 1.964 2 14.98 11.74 29 W.C 18.5 31.8 45.0 58.3 12.1 23 25 45.14 13.69 30 Venus . . . N.P. 33.5 47.1 ' 0.5 14.0 27.5 23 28 0.52 1.90 2 15.38 11.79 31 W.C 30.8 44.5 57.7 11.2 24.0 23 30 57.64 13.69 27.9SO 56.5 50.9 32 Venus . . . N.P. 46.8 0.5 13.5 27.5 40.5 23 33 13.76 1.88 2 16.12 11.81 01 W.C . . 59.6 13.0 39.8 23 35 12.97 13.61 Ther. att. 61°. 5 34 Venus . . . N.P. 2.2 15.5 29.4 4-2.5 56.4 23 37 29.20 1.744 2 16.23 11.86J Bar. red. to 32° F. 35 W.C 22.5 36.2 49.5 3.2 16.8 23 42 49.64 13.624 27.902 36 Venus . . . N.P. 40.0 53.5 6.5 20.3 34.0 23 45 6. 66 —1.73 +2 17.22 +11.894 Remarks. A clear and favorable night until interrupted by cirrus clouds abont the planet. Measures all very fair, a Somewhat blurred. 6 Clouds. Results. li. m. s. m. s. llev. Mean . . Eighteen transits .... 23 240.55 +212.78 .... +11.683 . h. in. m. s. Correction for chronometer at 23 3. . . —336.61 Santiago sid. time N. P h. m. // A f at 22 58 0.12 . =3 47.72 h. m. s. 22 59 3.94 AT SANTIAGO DE CHILE. 239 NOVEMBER 9, 1830. Clouily. NOVEMBER 10, 185O. No. for reference. Chronometer lime of tranflit. Mean of wires. Micr. Planet — Stnr. Bar. Thermometers. Object. A. B. C. D. E. A a. A S. Air. Wet. s. s. •i «. s. h. in. s. Rev. in. s. Rev. Inches. 0 o I 2 VIMIIH . . . N.r. TV. C 40.7 54.1 29.2 7.6 42.5 20.8 ! 34.5 55.8 ; 9.5 ! 22 32 7.54 22 33 42.54 — 7.07J +0.38 —1 35.00 —7.45} 28.114 T! er. att. 01°. 8 Bar. red. to 32° F. 28.0J5 62.0 53.8 Remarks. Clouds prevented further observation. These measures were made by daylight, and are good. Results. h. m. s. Mean . . One transit 82 32 7.54 h. s. m. s. Correction for chronometer at 22 32 . . . — 340.14 h. in. A p at 22 29 . . . m. s. -1 35.00 . Rev. — 7.455 Santiago sid. time N. P. . . ;/ . 0.00 . =223.29 h. m. s. . 22 28 27.40 NOVEMBER 11, 1850. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A<). Air. Wet. s. s. 8. 11.0 s. 8. h. m. s. Rev. 8. Rer. Inches. • - 1 W. C 43.8 57.5 37.5 22 37 10.78 —8.76 28.032 62.5 53.0 2 Venus . . . N.P. . . 49.5 3.2 16.8 22 37 49.76 9.70 +38.98 —0.94 3 4 5 6 7 W. C Venus . . . N.P. W. C 52.0 9.8 5.5 44.8 23.0 3.5 9.9 19.0 58.3 37.0 17.3 22.0 11.5 SO. 5 25.0 44.0 22 40 18.89 22 40 58.16 22 51 36.66 22 52 17. H 22 54 23.02 8.66i 9.60} 9.02} 9.84 9.00} 39.27 40.45 0.94 0.81J Ther. att. 64°. 0 Bar. red. to 32° F. 27.937 W. C 56.0 8 Venus . . . N P. 36.5 49.8 3.5 17.0 30.5 22 55 03.46 9.85 40.44 0.84} 9 W. C 5.0 18.5 31.7 . . 32 57 31.79 9.02} 10 11 12 Venus . . . N.P. \V. c 59.5 48.8 30.3 13.0 2.4 43.6 25.4 57.0 39.6 10.5 22 58 12.91 23 2 2.29 23 2 43.64 9.81 8.95 9.79 41.12 41.35 0.78} 0.84 Venus . . . N.P. 13a W. C 40.3 53.6 7.2 23 5 7.09 9.10 14 Venus . . . N.P. 22.0 35.5 48.8 2.3 15,8 33 5 48.88 9.91 41.79 0.81 15 o W. C 21.2 34.6 47.8 15.0 23 7 47.98 9.16 16 Venus . . . N.I1. 10.8 30.0 43.0 56.8 33 8 29.94 9.88 41.96 0.72 17 o W. C 16.0 29.5 43.3 10.0 23 10 43.03 9.11 1- Venus . . . N.P. 58.3 11.8 25.2 38.5 53.3 23 11 35.22 9.80 42.19 0.69 19 a W. C 54.0 7.3 21.0 23 13 20.89 9.08 20 Venus . . . N.P. 36.5 50.0 3.5 16.8 30.3 33 14 3.43 —9.78 +42.53 —0.72 240 INFERIOR CONJUNCTION OF VENUS, 1850-51, NOVEMBER 11, 1850— Continued. V Chronometer time of transit. Planet— Star. Thermometers. I Micr. Bar. 1 i Ohji'ct. A. B. C. D. E. A a. A ,5. Air. Wet." *, 6 s. s. s. , s. h. m. s. Rev. s. Rev. Indies. . 0 K 21 a W. C 1.0 14.5 27.8 55.0 23 16 27.90 —9.00J 28.042 55.6 50,0 32 Venus . . . N.P. 57.2 10.5 24.0 37.5 23 17 10.59 9.71 +42.69 —0.70} Ther. ntt. 23a W. C 40.5 53.8 7.7 . . 34.2 23 19 7.38 8.98 61°. 5 24 Venus . . . N P. 33.4 26.8 50.3 3.5 17.2 23 19 50.24 9.65} 42.86 0.67} Bar. red to 32° F. 27.954 25 o W. C 21.2 34.6 48.0 15.2 23 31 48.08 8.90 36 Venus . . . N.P. 4.2 18.0 31.2 44.5 58.1 23 22 31.20 9.55 43.12 0.65 37 a W. C 4.0 18.0 31.5 58.5 23 24 31.33 8.8S SB Venus . . . N.P. 48.0 1.5 15.0 £8.2 41.8 23 25 14.90 9.50 42.57 0.65 39 W. C 47.9 1.4 15.0 , , 41.8 23 27 14.85 8.88} 30 Venus . . . N.P. 31.5 45.0 58.5 11.8 25.4 23 27 58.44 9.44 43.59 0.55} 31 W. C 23.0 36.5 50.0 17.0 23 29 49.95 8.79} 33 Venus . . . N.P. 6.8 20.0 33.5 47 0 0.5 23 30 33.56 9.37} 43.61 0.58 33 W. C 9.2 22.5 36.1 3.0 23 33 36.03 8.73} 34 Venus . . . N.P. 53.2 6.5 20.0 33.7 47.0 23 33 20.08 9.35} 44.05 0.62 35 W. C 2.6 16.3 29.5 57.0 23 35 29.68 8.73} 36 Venus . . . N.P. 47.2 0.5 14.0 27.5 41.0 23 36 14.04 9.26} 44.36 0.53 37 W. C 52.0 5.5 19.1 45.5 23 38 18.85 8.78 38 Venus . . . N.P. 36.5 3.5 17.0 30.5 23 39 3.51 9.30} 44.66 0.52} 39 W. C 25.0 38.5 52.0 19.0 23 42 51. U5 8.71} 40 Venus . . . N.P. 10.0 23.5 37.0 50.4 3.5 23 43 36.88 9.22} 44.93 0.51 41 W. C 17.5 31.2 44.6 23 45 44.49 8.70 43 i Venus . . . N.P. 3.0 16.5 29.5 43.2 56.8 23 46 29.80 9.16 45.31 0.46 43 W. C 4.1 17.5 31.0 59.5 23 4831.35 8.66 44 Venus . . . N.P. 49.5 3.2 17.0 30.0 43.5 23 49 16.64 9.19} 45.29 0.53} 45 W. C 54.3 7.5 21.0 t 23 51 20.99 8.63 46 i Venus . . . N.P. 39.9 53.5 7.0 20.5 34.0 23 52 6.98 9.13 45.99 0.50 47 W. C 14.5 28.1 42.0 . 8.5 23 54 41 .60 8.66 48 Venus . . . N.P. 0.8 14.0 27.5 41.0 54.8 23 55 27.62 9.19 46.02 0.53 49 W. C 53.5 7.3 20.8 23 57 20.56 8.66 50» Venus . . , N.P. 41.0 53.5 7.0 20.5 34.0 23 58 7.20 9.11 46.64 0.45 51 W. C 39.0 53.5 6.0 0 0 5.89 8.73} 536 Venus . . . N.P. 25.5 39.0 52.5 6.0 19.5 0 0 52.50 9.15 46.61 0.41} 53 W. C 18.5 32.3 45.5 0 2 45.49 8.81 54 Venus . . . N.P. 5.5 18.5 33.9 45.5 59.1 0 3 33.16 9.26 46.67 0.45 55 W. C 25.2 39.0 52.0 0 5 52.12 8.81 56 Venus . . . N.P. 12.0 35.5 39.0 52.2 6.0 0 6 38.94 9.28} 46.82 0.47} 57 W. C 54.5 8.0 21.5 0 9 21.39 8.93 58 c Venus . . . N.P. 41.5 54.5 9.0 23.3 36.0 0 10 8.66 —9.33 +47.27 —0.41 Remarks. By far the finest night and most satisfactory measures during the series. Both objects were extremely well defined and their motions steady. The first two measures were made by daylight, and there were also four measures made under like circumstances with a following star; but they are not copied from the original. a Both tine observations. A Tremulous. <- l-'.Mremely tremulous. AT SANTIAGO DE CHILE. NOVEMBER 11, 1830— Continued. Results. h. ni. s. Mean . . Twenty-nine transits . . 23 27 45.74 h. m. m. s. Correction for chronometer at 23 28 . . . —342.85 m. 8. Rev. + 43.56 .... —0.632 . . Santiago sui. time N. P. h. m. " A|>at2324 0.01 . =0 12.32 h. m. s. 23 24 2.89 241 NOVEMBER 13, 185O. Cloudy. NOVEMBER 13, 185O. I Chronometer time of transit. Planet — Star. Niermometerg. 1 Object. A. B. C. D. E. Mean of wires. Micr. A a. Ad. Air. Wet. 1 cz o 8. a. s. 8. s. h. in. 8. Rev. m. s. Rev. Inches. * ° la W. C 6.5 20.3 33.4 47.5 22 39 33.59 —13.36 28.062 62.5 52.3 24 Venus . . . N.P. • • 47.5 1.0 14.5 22 40 47.60 2.66 + 1 14.01 + 10.70 Ther. alt. 3a W. C 32.6 46.2 59.5 13.0 26.5 22 42 59.56 14.091 63°. 4 4 Venus . . . N.P. . 0.6 14.0 27.5 41.0 22 44 14.07 3.32* 1 14.51 10.77 Bar. red. to 32° F. 27.969 5 W. C 33.8 47,2 0.7 14.0 27.5 22 51 0.64 13.47 6 Venus . . . N.P. • • 2.6 15.8 29.0 42.5 22 53 15.77 2.63 1 15.13 10.84 Tc W. C 32.0 45.5 59.0 12.2 25.8 22 54 58.90 13.51 8 Venus . . . N.P. 47.5 1.2 15.0 28.2 41.5 22 56 14.68 2.621 1 15.78 10.881 9 W. C 51.0 4.5 17.8 44.5 23 0 17.78 13.79 10 Venus . . . N.P. 7.0 20.5 34.0 47.3 1.0 23 1 33.96 2.90 1 16.18 10.89 11 W. C 34.8 48.0 1.2 28.2 23 5 1.37 13.70 12 Venus . . . N.P. 51.5 4.2 17.5 31.0 44.3 23 6 17.70 2.76 1 16.33 10.94 13 d W. C 50.0 3.2 16.6 43.5 23 10 16.68 12.661 14 Venus . . . N.P. 6.5 20 2 33.5 47.0 0.5 23 11 33.54 1.551 1 16.88 11.11 • 15 W. C 7.5 20.8 34.3 47.6 1.0 23 16 34.22 12.58 16 VcnUB . . . N.P. 24.6 38.2 51.6 4.8 18.5 23 17 51.54 1.42 1 17.32 11.16 17 W. C 49.4 2.6 16.0 29.5 43.0 23 21 16.10 15.541 18 Venus . . . N.P. 6.5 20.0 33.6 47.0 0.5 23 22 33.52 4.501 1 17.42 11.04 19 W. C 34.0 47.6 1.0 14.2 27.6 23 25 0.88 15.711 20 Venus . . . N.P. 52.0 18.8 32.3 45.8 23 26 18.87 4.56 1 17.99 11.151 | 21 W. C 52.3 5.8 19 2 32.5 46.0 2328 19.16 15.67 23 VCIIUH . . . N.P. 10.5 24.0 37.5 51.0 4.0 23 29 37.40 4.15 1 18.24 11.32 23 W. C 7.6 21.2 34.5 48.0 1.5 23 31 34.56 15.681 « 24 Venus . . . N.P. 26.2 39.5 53.1 6.5 20.0 23 32 53.06 4.45 1 18.50 11.231 85 W. C 17.5 30.6 44.0 57.3 11.0 23 85 44.08 15.641 86 Venus . . . N.P. 36.1 49.5 2.8 16.0 29.5 23 37 2.78 4.34 1 18.70 11.301 27 W. C 9.2 22.3 35.8 49.3 2.5 23 39 35.82 IS. 53 28 Venus . . . N.P. 27.6 41.0 55.0 8.2 21.5 23 40 54.66 4.28 1 18.84 11.85 29 W. C 47.0 0.5 13.5 27.0 23 43 0.29 15.64 30 Venus . . . N.P. 52.5 6.0 19.5 39.8 46.3 23 44 19.42 4.31 1 19.13 11.33 31 W. C 12.5 25.7 39.3 52.5 6.2 23 46 39.24 15.59 39 Venus . . . N.P. 32.0 45.2 58.8 12.0 25.5 23 47 59.70 4.281 1 20.00 11.30J 33 W. C 43.4 56.6 10.0 23.5 37.1 23 50 10.12 15.641 34 Venus . . . N.P. 3.2 16.5 30.0 43.5 58.8 23 51 30.00 -4.261 +1 19.88 +11.38 a 31 242 INFERIOR CONJUNCTION OP VENUS, 1850-51, NOVEMBER 13 1850— Continued. S Chronometer time of transit. Planet — Star. Thermometers. I Mean of wires Micr. Bar. I Object. A. B. C. D. E. A a. AJ. Air. Wet. 1 0 8. 8. s. s. , h. m. s. Rev. m. s. Rev. Inches. • 0 35 w. c 13.0 25.5 38.5 52.5 6.0 23 53 38.90 —15.664 28.066 55.5 48.1 36 Venus . . . N.P. 32.2 45.5 59.0 13.2 25.5 23 54 58.88 4.22 +1 19.98 +11.444 Ther. att. 37 W. C 53.0 6.5 20.0 33.5 47.0 23 57 26.00 15.66 62°. 0 38 Venus . . . N.P. 13.5 27.0 40.5 53.6 7.2 23 5840.36 4.204 1 20.36 11.454 Bar. red. to 32° F. 27.977 39 W. C 30.5 44.3 57.8 11.0 24.7 0 0 57.66 15.68 40 Venus . . . N P. 51.5 5.0 18.5 31.8 45.5 0 2 18.46 4.21 1 20.80 11.47 41 W. C 43.7 57.3 10.5 24.0 37.5 0 5 10.60 15.77 42 d Venus . . . N.P. 5.0 18.5 31.5 45.0 58.6 0 6 31.72 4.33 1 21.12 11.44 43 W. C 44.8 58.2 11.5 25.0 38.6 0 10 11.62 16.14 44 Venus . . . N.P. 6.2 19.6 33.0 46.5 0.0 0 11 33.04 4.52 1 21.42 11.62 45 W. C 36.3 49.6 3.4 16.6 30.2 0 14 3.20 16.22 46 Venus . . . N.P. 57.6 11.0 24.5 38.0 51.5 0 15 24.52 4.64 1 21.32 11.58 47 W. C 18.0 31.5 45.0 58.4 12.0 0 17 44.98 16.29 48 Venus . . . N.P. 40.2 53.5 7.0 20.5 33.6 0 19 6.96 — 4.72 +1 21.98 +11.57 Remarks. Night clear, though the planet (seen with the diminished aperture) was never either sharply defined or steady, and the measures can only be con- lidered fair. a These two observations were made by daylight, though the lamps were lighted. ft Recorded 37.5s. and 51.0s. at wires C and D, respectively, c Recorded 27.0s. at wire A. at 22 50 h. m. H. 22 53 15.84 23 39 3.45 m. B. . —3 52.29 . —3 52.39 m. B. — 1 42.23 — 1 45.47 Rev. — 0.835 — 1.296 = 0 16.27 = 0 25.26 0.01 h. m. H. Santiago sid. time N. P 22 49 23.55 Santiago sid. time N. P 233511.06 b. m. " A f at 23 36 0.0-2 NOVEMBER 16, 185O. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. &i. Air. Wet. B. 8. 8. B. 8. b. m. s. Rev. m. B. Rev. Inches. * a la Venus . . . N.P. 39.3 53.3 6.0 19.4 32.8 22 53 6.14 — 4.73J 27.954 71.3 57.4 26 W. C 9.0 32.5 36.0 49.0 2.8 22 55 35.86 +3.26J —2 39.73 —8.00 3a 4 5a Venus . . . N.P. W. C Venus . . . N P. 13.8 43.5 41.5 " 27.5 57.0 55.0 40.7 10.1 8.5 54.1 23.5 21.7 7.5 37.5 35.1 22 57 40.72 33 0 10.312 33 2 8.36 —4.20 +3.80 —3.35 2 29.60 8.00 Ther. att. 69°. 8 Bar. red. to 32° F. 27.841 6 W. C 11.0 24.5 37.8 50.8 4.5 23 4 37.72 +4.604 2 29.36 7.951 7 Venus . . . N.P. 27.5 41.0 54-5 7.8 21.1 23 9 54.38 —3.51 8 W. C 56.3 9.8 33.0 36.5 50.0 23 1223.12 +4.3H 228.74 7.8'J 9 Venus . . . N.P. 8.2 21.8 35.2 48.3 1.8 23 14 35.06 —3.75 10 W. C 36.5 50.3 3.0 16.5 30.2 23 17 3.28 +4.05 2 28.23 7.80 11 Venus . . . N.P. 50.0 3.5 16.5 30.0 43.5 33 19 16.70 —3 54 12 W. C 18.0 31.5 44.8 58.0 11.5 23 21 44.76 +4.15 —2 28.06 — 7.«9 246 INFERIOR CONJUNCTION OF VENUS, 1850-51, NOVEMBER 16, 1850— Continued. j Chronometer time of transit. Planet— Star. Thermometers. c W pin of w'rp Micr. Bar i j £ Object. A. B. C. D. E. A a. A„ Venus , . . N.P. 51.3 4.7 18.1 31.3 23 7 18,00 4.65} 10 B. A. C. . . 6194 • • 51.8 8.2 21.5 34.5 23 8 8.09 3.83 50.09 0.821 lla Venus . . . N.P. 46.0 0.0 13.3 26.5 23 12 13.10 4.82 12 B. A. C. . . 6194 • • 49.5 3.0 16.3 29.8 23 13 2.99 4.14 49.89 0.68 n,i Venus . . . N.P. 20.5 34.0 47.1 0.5 t t 23 14 47.18 4.73J 14 B. A. C. . . 6194 23.5 37.0 50.3 3.5 23 15 36.91 4.02 49.73 0.71J 156 Venus . . . N P. 59 5 13.0 26.0 , m 23 17 26.13 4.63 16 B. A.C. . . 6194 49.0 2.5 16.0 99.0 42.5 23 18 15.80 4.05; 49.67 0.57i 176 Venus . . . N.P. 45.0 58.5 12.0 25.4 23 20 11.88 4,55 18 B. A. C. . . 6194 48.5 1.5 14.5 28.2 S3 21 1.51 3.97 49.63 0.58 19 f, Venus . . . N.P. 33.2 46.5 59.5 13.3 23 31 53.78 7.10 20 B. A. C. . . 6194 35.5 49.0 2.5 16.0 23 32 49.09 6.72 49.31 0.38 21 c Venus . . . N.P. 1.5 14.5 27.8 41.0 23 36 27.85 6.64J 22 B. A. C. . . 0191 3.5 16.8 30.5 43.5 23 37 16.91 6.31 49.06 0.33i 23 Venus . . . N.P. 52.5 6.0 18.8 32.3 23 39 19 05 6.37 M R. A. C. . . 6194 • • 51.5 8.0 21.0 34.5 23 40 7.84 6.13i 48.7° F. 28.012 6 W. C 20.2 33.5 46.8 0.0 13.2 0 10 46.74 6.00 6 1.52 0.30J 7 Venus . . . N.P. 11.2 24.5 37.8 51.0 4.2 0 12 37.76 5.52 8 W. C 12.5 26.0 39.1 52.2 5.5 0 18 39. C6 6.03 6 1.30 0.51 9 Venus . . . N.P. 9.0 22.5 35.5 48.5 2.3 0 20 33.56 5.281 10 W. C 10.5 24.0 37.5 50.5 4.0 0 26 37.30 5.69 6 1.74 O.COj 11 Venus . . . N.P. 55.5 8.6 21.6 35.0 48.5 0 28 21.84 5.43 12 w. c 56.5 9.5 23 0 36.3 50.0 0 34 33.06 6.28 6 1 .22 0.85 13 Venus . . . N.P. 51.5 5.0 18.2 31.5 44.5 0 .% IP. 14 5. '5 14 VV. C 52.7 6.0 19.0 32.0 0 42 19.05 —6.74.1 —6 0.91 +0.99J Remarks. The night has been remarkably clear; but, owing to an unprecedented storm of rain, accomp;u.ied with thunder and lightning from 4 A. ». until ll; A. M., there is so much moisture in the air that boih objects ore blazing and unsteady. The measures are therefore only fair. a Measures by daylight. '• l-"»i>~ '•''< working well. 252 INFERIOR CONJUNCTION OF VENDS, 1850-51, NOVEMBER 25, 1850— Continued. Results. li. ni. s. Mean . . . Seven transits . . . . 0 12 27.74 li. m. m- s. Correction for chronometer at 0 12 . . —422.10 li. m. ApatO 11 0.01 m. s. Rev. ' " — 6 1.27 .... +0.460 . . . . =0 9.35 h. m. s. Santiago sid. time N. P 0 8 5.64 NOVEMBER 20, 185O. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet — Star. Bar. Thermometers. A. B. C. D. E. A a. A S. Air. Wet. s. s. s. s. s. h. m. B. Rev. m. s. Rev. Inches. « • 1 Venus . . . N.P. 40.5 53.7 7.0 20.5 34.0 0 47 7.14 — 3. £4 27.940 64.8 59.0 2 3 4 5 Taylor . . . 8458 Venus . . . N.P. Taylor . . . 8-158 Venus . . . N.P. 27.5 16.0 16.5 2D.5 17.5 29.8 54.8 43.2 30.5 43.5 56.5 44.0 56.5 21.5 10.0 57.8 10.1 0 50 54.54 0 51 43.01 0 58 30.85 1 0 43.28 16.63 6.02 19.67 8.33 —3 47.40 3 47.81 + 13.39 13.65 I'lir-r. att. Bar. red. tn 33^ F. 37.832 6 Taylor . . . 8458 • • 17.5 44.0 57.5 1 4 30.85 -20.07J —3 47.57 + 13.75J Remarks. Images good, but ohservations only fair. Results, )]. IN. S. Mean . . Three transits 05411.15 m. s. — 3 47.59 . h. m. Correction for chronometer at 0 5-1 . m. s. — 4 24.3 Rev. + 13.598 . Santiago sid. time N. P. = 4 26.03 h. m. s. 0 4!) 46.83 ApatO 51 1.35 NOVEMBER 27, 185O. Night cloudy. NOVEMBER 28, 185O. t g Chronometer time of transit. Planet— Star. Tlierinomrters. Object. A. B. C. D. E. A a. A A Air. Wet. 1 s. s. B. e. B. li. in. 8. Rev. m. B. Rev. Inches. 0 • la Venus . . . N.P. 32.5 45.8 5B.O 12.0 25.5 33 54 5H.06 —4.88 27.948 63.3 55.2 2 B. A. C. . . 6214 54.5 • • 21.0 34.0 47.5 23 58 20.94 15.78 —3 21.98 +10.90 3o Venus . . . N.P. 53.1 6.2 19.5 33.0 46.0 0 2 19.46 8.94i Ther. att. 65°. 6 4 B. A. C. . . 6214 15.2 28.5 41.7 54 6 8.2 0 5 41.64 19.96J 3 22.18 11.02 Bar. ml. tn 32° V. 5!> Venus . . . N.P. . . 19.4 T2.5 45.5 59.0 0 10 32.48 4.59J 27.8-18 6 B.A. C. . . 6214 28.0 41.5 54.7 7.5 21.0 0 13 54.54 15.81 322.05 n.au 7 Vi-l.lli . . . N.P. 42.0 5.-..0 8.5 21.7 33.0 0 17 8.44 4.981 8 B. A. U. . . 6214 4.5 17.5 31.0 44.3 57.5 0 30 30. 06 16.45 3 22.52 11.46J 9 Venus . . . N.P. 27.5 •M :, 7.0 20.5 0 23 53. BO 5.76J 10 I). A C. . . 6211 49.8 3.0 IO.S •J'.I.U 43.8 0 -M Iti. 16 —17.33 —3 22.36 +11.59J AT SANTIAGO DE CHILE. 253 NOVEMBER £8, 1 8SO-C oiitimu tl. V Chronometer time of tian.-it. Planet— Star. Thermometer?. Vf ' f ' Bar Jj E Object. A. B. C. D. E. A a. && Air. Wet. 1 0 8. s. 8. h. m. s. Rev. m. 8. Ecv. Incites. 0 0 2 11 Venus . , . N.P. 57.0 10.0 23.7 36.6 50.3 0 28 23.52 —6.16 S7.C48 63.3 55.2 13 B. A. C. . . 6214 32.5 46.0 59.4 12.6 0 31 46.01 17.84 —322.49 +11.68 Ther. att. 13 Venus . . . N.P. 7.5 20.8 34.0 47.2 0.5 0 33 34.00 6.34 65°. 6 14 B. A. C. . . 6214 30.0 43.5 50.6 10.0 23.2 0 36 56.66 18.12 3 22.66 11.78 Bar. red. t,i :H i-\ 27.848 15 Vc'IIIH . . . N.P. 23.5 M.6 49.0 2.0 15.5 0 38 48.92 6.64 16 I!. A. C. . . 6214 45.0 58.3 11.6 24.9 38.8 0 42 11.60 18.49{ —3 22.68 + 11.85i 17 Venus . . . N.P. 49.5 3.2 1,6.5 29.5 43.0 0 44 16.34 —7.431 18c B. A. O. . . 6214 Remarks. l >!,j'vt> hi;, /in;; and very unslea dy all the evening. There is not a good measure among them, or at least there is not one so considered at the time of muking it. a Measures by daylight. c Lost in the haze. 4 Lamps u'urking badly. Results. h. m. s. Mean .... Eight transits . . . 0 18 35.00 h. m. m. s. Correction for chronometer at 0 19 , . . —430.37 h. m. A p at 0 16 . . . m. >. -3 22.36 . Rev. . +11.439 Santiago sid. time N. P. H . 0.37 = 3 42.95 h. m. 8. 0 14 4.63 NOVEMBER 29, 1850. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ai, Air. Wet. s. s. 8. s. 8. h. m. s. Rev. m. s. Rev. Inches. • O 1 2 \Vnin . . . N.P. W. C 52.5 22.5 5.5 35.7 18.8 49.0 33.1 2.5 45.4 16.0 0 34 18.86 0 35 49.14 — 2.35 —16.98 —1 30.28 +14.63 28.018 56.7 51.5 Remarks. The dilTcrcnlial measures wtru interrupted by clouds. Results. li. m. B. Menu .... One triliisit , . . . 0 31 18.86 li. m. ni- f. Ctmtxlimi Cur chronometer nl 0 3-1 . . . — -1 U2.3U h. 111. A f> ut 0 30 m. i. Rev. — 1 30.28 ... + 14.030 . Santiago fit!, lime N. P. /» . 0.71 / n = 4 40.14 ll. m. ». 0 ai -16.56 254 INFERIOR CONJUNCTION OF VENUS, 1850-51, NOVEMBER 30, 1850. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A" F. 27.932 59.9 54.8 W. 0 Venus . . . N.P. W. C 40.0 12.5 53.0 25.6 6 Venus . . . N P. • • 4.0 17.5 30.7 0 24 4.24 9.05J 25.53 5.24 7 W. C 30.7 44.0 57.3 0 27 57.14 14.70 8 Venus . . . N.P. 23.6 35.6 49.0 0 28 22.57 9.33 25.43 5.37 9 W. C 10.2 23.5 36.8 0 30 36.64 14.85 10 Venus . . . NP. • • 1.5 15.0 28.3 0 31 1.77 9.46 25.13 5.39 11 W. C 51.0 4.5 17.6 0 33 17.51 15.06 13 Venus . . . N.P. 42.5 55.8 9.3 0 33 12.71 9.64 25.20 5.42 13 W. C 17.6 31.0 44.2 t 0 33 44.07 15.35 14 Venus . . . N.P. 9.3 22.5 35.8 0 36 9.37 9.67J 25.30 5.67J 15 w. e 40.5 54.0 7.5 0 38 7.14 15 55 16 a Venus . . . NP. • • 32.0 45.5 58.5 0 38 32.17 9.86 25.03 5.69 176 W. C 14.5 27.5 41.0 0 40 40.81 15.75-J 18 Venus . . . N.P. 5.7 18.9 32.5 0 41 5.87 —10.02 +25.06 +5.73J Remarks. No good image during the measures. There was a storm of rain, thunder, and lightning over the city from 3£ to 4 p. M , which has left a raw and moist atmosphere. The lightning struck within half a mile of the observatory ; the only instance remembered when a house within the city experienced injury from such cause. a Recorded 22.0s. at wire C. b Recorded 31.0s. at wire C. Results. h m. P. Mean . . . Nine transits . . . . 0 30 16.81 h. m. m. n. Correction for chronometer at 0 30 . . . —434.34 B. Rev. + 25.24 . . . . +5.411 Santiago sid. time N. P. . =1 46.05 h. in. s. 0 25 42.47 h. m. A p at 0 25 0.27 DECEMBER 1, 1850. Cloudy. DECEMBER 3, 1850. Cloudy. AT SANTIAGO DE CHILE. 255 DECKMBKll 3, 1850. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. TIl'TliMMII' t'T-. A. «. C. V. E. Act. Ad. Air. Wet. .. s. s. s. S. h. m. 8. Rev. B. Rev. Inches. • 0 1 WMIIS . . . 8. P. 39.5 53.2 t t 0 29 52.88 — 8.48 28.035 63.5 54.5 a w. c . . . . 23.0 49.5 0 30 23.13 16.63} —30.25 +8.151 3 4 I 6 8 9 10 Venus . . S.P. we. . . 28.7 41.8 55.2 25.0 23.7 54.0 11.7 38.0 7.5 51.5 20.5 8.5 7.5 0 32 54.98 0 33 25.07 0 35 23.65 0 35 54.23 0 38 11.65 0 38 42.38 0 41 10.35 0 41 41.38 8.971 17.07 9.131 17.421 9.53 17.891 9.921 —18.51 30.09 30.58 30.73 —31.03 8.091 8.29 8.361 +8.58J Ther. an. 64°. 5 Bar. red. to 32° P. 27.939 Venus . . . S.P. vv. c 57.5 :o.s Venus . . . S.P. 45.5 58.5 Venn-! . . . S.P. W. C. 44.0 57.3 10.5 41.5 Remarks. Extremely blurred and indistinct. Measures by daylight. The star is not larger than 7.8th magnitude, instead of 6th magnitude, as in the Wash- ington Catalogue. Results. h. m. s. Mean .... Five transits . . . 0 35 30.70 h. in. m. s. Correction for chronometer at 0 35 . . . — 4 40.90 h. m. B. Rev. — 30.54 .... +8.298 Santiago sid. time S. P. . =242.10 h. m. --. . 0 30 49.80 ApatO 31 DECEMBER 4, 1850. At night the star was too distant for observation. DECEMBER 5, 185O. The ftir was seen ton dimly for differential measurements with the equatorial. Diameter of Venus from a mean of 10 measures at Oh. 30m. sid. time, 3.238 rev. Corrected diameter, 60".91. DECEMBER 39, 1850. Unable to distinguish the comparing star in the morning twilight. DECEMBER 31, 1850. Comparing star undistinguishable in the morning twilight. JA.VUARY 5, 1851. Only the morning* of the 1st (3d civil) and .'th (6th civil) of January have been clear ; but it has not boon po»sibl<> to distinguish the comparing star, when Venus waa ilimciently above the horizon for observation). 256 INFERIOR CONJUNCTION OF VENUS, 1S50-51, JAMTTARY 0, 1851. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. R. C. D. E. A a. ** Air. Wet. 8. s. s. 8. s. h. m. s. Rev. m. a. Rev. Inches. • • 1 Venus . . . S.F. 0.5 1S.5 26.2 38.5 50.8 11 15 25.90 + 1.721 27.992 58.0 £1.1 2 B. A. C. . . 5839 9.0 21.5 ai.s 46.2 59.0 11 21 33.84 11.28 —6 7.94 —9.551 3 4 5 Venus . . . S F. B. A. C. . . 5839 Venus . . . S.F. 20.5 29.0 30.5 33.5 41.5 43.0 46.0 53.6 56.0 58.5 6.0 8.2 11.0 18.5 20.8 11 23 45.90 Jl 29 53.73 11 31 55.70 1.54 10.96 1.24 6 7.82 9.42 Tiler, ntt. 63°. 3 Bar. red. to 31° F. 27.899 6 B.A. C. . . 5639 38.5 51.0 3.5 16.0 28.5 11 38 3.50 10.51'i 6 7.80 9.351 7 Venus . . . S.F. 44.5 57.5 10.0 22.5 35.0 11 40 9.90 0.11 8 B. A. C. . . 5839 52.5 5.0 • • 30.2 42.5 11 46 17.49 + 9.53 —6 7.59 —9.42 There were no remarks on this morning's observations. Results. h. m. s. Mean . . . Four transits .... 112749.35 h. m. s. Correction for chronometer at 1 1 28 . . . —42.30 h. m. A p at 11 30 . . . m. c. Rev. — 6 7.79. . . . —9.437 Santiago sid. lime S. F. n . 0.24 t it . =3 3.93 li. m. s. . 11 27 7.05 JANUARY 1, 1851. V Chronometer time of transit. Planet— Star. Thermometers. £ Micr Object. A. B. C. D. E. A a. A* Air. Wet. ft s. 8. s. 8. s. h. m. s. Rev. m. s. Rev. Inches. • « 1 Venus . . . S.F. 24.5 37.0 49.0 1.5 14.0 11 19 49.20 +5.96J 28.062 61.0 54.0 2 B. A. C. . . 5839 11.0 37.5 50.0 2.5 11 25 37.14 5.25 —5 47.94 +0.71J 3 Venus . . . S.F. 38.5 51.5 3.5 28.5 11 28 3.59 8.32 Ther. att. B3°.5 4 B. A. C. . . 5839 26.5 39.7 51.6 4.2 16.6 11 33 51.72 7.54 5 48.13 0.78 Har. red. to 32° F. 5a Venus . . . S.F. 30.3 43.0 55.2 7.5 20.3 11 35 55.26 8.471 6 B. A. C. . . 5839 30.5 43.0 55.5 7.7 11 41 42.95 7.61 5 47.69 0.86J 7 Venus . . . S.F. 5.5 17.5 30.1 42.5 54.7 11 43 30.06 8.16J 8 B. A. C. . . 5839 • • 17.5 30.5 42.7 11 49 17.79 +7.31 —5 47.73 +0.851 Remarks. All very fair measures, o Measures by aylight. Results. h. m. s. Mean . . . Four transits . . . . 11 31 49.53 h. m. s. Correction for clironomcter at 1 1 32 ... —43,50 h. in. m. s. Rev. — 547.87 .... +0.831 . Santiago Bid. time S. F A pat 11 34 O.o3 / if = 0 15.67 li. m. s. Jl 31 G.OJ AT SANTIAGO DE CHILE. 257 No. for reference. JANUARY 8, 1S.-.1. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. U. D. E. A a. A,!. Air. Wet. s. s. 8. 8. 8. h. m. 8. Rev. in. s. Rev. Inches. | • 1 Venus . . . S.F. 58.0 10.5 23.0 35.5 47.7 11 23 23.94 +11.94 28.033 56.8 52.0 2 B. A. C. . . 5839 17.5 . . 42.1 54.5 7.0 11 28 42.16 3.01 —5 19.22 +8.90 3 4 5 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. 23.6 41.5 55.3 35.0 54.0 8.0 47.5 6.0 20.0 0.0 18.6 32.5 12.5 31.5 44.8 11 30 47.52 11 36 6.32 11 3820.12 11.71 2.74 11.25 5 18.80 8.97 Then att. 64°. 0 Bar. red. to 32° F. 27.938 6 I!. A. C. . . 5839 • • 26.5 39.0 51.5 3.7 11 43 38.95 2.27i 5 18.83 8.97J 7 Vflnia . . . S.F. 11.5 24.3 36.6 49.0 1.5 11 45 36.68 10.721 S B A. C. . . 5839 30.5 43.0 55.5 7.8 20.0 11 50 55.36 1.69 5 18.78 9.03J 9 10 Venus . . . S.F. 1!. A. C. . . 5839 26.8 45.0 39.3 57.8 51.5 10.0 4.0 22.5 16.5 35.0 11 52 51.62 11 58 10.06 10.08 + 1.03 —5 18.44 +9.03 Remarks. Fine morning; objects steady, sharply defined, and the measures considered good. Results. h. m. s. Mean .... Five transits . . . 113811.76 h. ill. s. Conection for chronometer at II 38 . . . — 44.41 h. m. A f at 11 40 . . . . m. s. Rev. — 5 18.81 .... +8.986 Santiago Sid. time 8. F i it = 2 55.14 h. m. B. 11 37 27.35 0.24 JANUARY 9, 1851. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet — Star. Bar. Thermometers. A. B. C. D. E. A a. A<5. Air. Wet. B. s. s. 8. s. b. m. s. Rev. m. B. Rev. Inches. • 0 1 Venus . . . S.F. 33.5 46.3 58.8 11.1 23.5 11 16 58.64 +18.43 28.010 60.6 55.4 S II. A. C. . . 5839 15.0 27.5 40.0 52.3 4.8 11 21 39.92 3.52} —4 41.28 +14.90J 3 4 5 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. 21.8 2.5 8.6 33.8 15.0 21.0 46.7 27.5 33.5 59.2 40.0 46.0 11.6 52.5 58.3 11 23 46.62 11 28 27.50 H 30 33.48 18.34 3.40} 17.91 4 40.88 14.93} Ther. att. 64°. 6 Bar. red. to32°F. 27.913 6 B. A. C. . . 5839 49.0 1.5 14.0 26.5 39.0 11 35 14.00 3.04 4 40.53 14. 97 7 Venus . . . S.F. 5-1.3 6.6 19.0 31.4 43.9 11 37 19.01 17.56 8 B. A. C. . . 5839 34.5 47.0 59.3 11.6 24.0 11 41 59.28 2.51 4 40.24 15.05 9a Venus . . . S.F. 32.0 57.7 10.2 22.5 11 44 57.49 +14.85 10 i B. A. C. . . 5839 13.0 38.3 50.5 3.0 11 49 38.09 — 0.27 4 40.60 15.12 11 Venus . . . S.F. 5.5 18.0 30.5 42.8 55.1 11 52 30.38 +18.17 12 B. A. C. . '. 5839 45.5 58.0 10.5 23.0 35.3 11 57 10.46 3.02} 4 40.08 15.14J a VeMIN . . . S.I'. 1.1 14.0 26.5 39.0 51.3 11 59 26.46 20.22 14 B. A. C. . . 5839 42.0 54.3 6.6 19.0 31.5 12 4 6.68 +5.02 —4 40.22 +15.20 33 258 INFERIOR CONJUNCTION OF VENUS, 1850-51, JANUARY 9, 1851— Continued. Remarks. Fine morning, clear images, and pood measures. a Measures by daylight. * Recorded 37.3s. at wire C. Results. li. in. s. Mean . . . Seven transits .... 11 37 56.C2 h. m. s. Correction for chronometer nt 11 38 . . . —44.88 h. in. A pat 11 29 . . . in. s. Rev. — 4 -JO. 55 .... +15.033 sid. time S. F. . 0.32 . =4 52.97 h. m. s. 11 37 11.11 JANUARY 10, 1851. « C 1 V 1 d f. 1 a Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. liar. rhermometers. A. B. C. D. E. A a. A J. Air. Wet. s. s. s. s. s. h. m. s. Rev. m. s. Rev. Indies. • O Venus . . . S.F. 50.5 3.3 15.5 28.0 -10.5 11 3 15.56 +22.08 28.020 60.0 54.7 2 B. A. C. . . 5839 45.0 57.5 10.0 22.4 35.2 11 7 10.02 3.03J —3 54.46 +19.01J 3a 4 56 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. 36.5 31.0 38.8 49.5 43.5 51.5 55.9 4.0 14.3 8.5 16.5 26.7 21.0 28.5 11 10 1.70 11 13 55.98 11 16 3.86 20.31 1.24 19.71J 3 54.28 19.07 Tlier. att. 65°. 0 Bar. red. to :H« F. 27.922 6 B. A. C. . . 5839 33.0 45.8, 58.1 10.6 23.0 11 19 58.10 0.72 3 54.24 18.99J 7 Venus . . . S.F. 43.6 56.3 8.5 21.2 33.5 11 22 8.62 19.58J e B. A. C. . . 5839 38.0 50.0 2.5 15.1 27.5 11 26 2.62 0.53 3 54.00 19.05J 9 Venus . . . S.F. 16.6 29.4 42.0 54.5 6.8 11 28 41.86 20.37 10 B.A. C. . . 5839 10.5 23.0 35.5 47.8 0.4 11 32 35.44 1.30J 3 53.58 lii.ni;; lit Venus . . . S.F. 15.0 27.5 39.8 52.3 4.6 11 34 39.84 19.70 13 B. A. C. . . 5839 8.1 20.6 33.0 45.5 57.9 11 38 33.02 0.61 3 53.18 19.09 14 Venus . . . S.F. B. A. C. . . 5839 31.0 24.0 43.5 36.8 56.0 49.5 8.3 1.5 20.8 14.0 11 40 55.92 11 44 49.16 +19.02J -0.04 3 53.24 19.06i 15 e 16 Venus . . . S.F. B. A. C. . . 5839 3S.5 31.5 51.3 44.0 3.5 56.5 16.3 9.0 28.5 21.5 11 47 3.62 11 50 56.50 +18.43 — 0.63 3 52.88 19.06 17 18 Venus . . . S.F. B. A. C. . . 5839 53.5 46.3 6.0 59.0 18.5 11.5 23.8 43.4 36.3 11 53 18.44 11 57 11.38 +17.80 —1.29 3 52.94 19.09 19 30 Venus . . . S.F. B. A. C. . . 5839 40.0 32.3 52.5 44.5 5.0 57.0 9.6 29.5 22.1 12 0 4.84 12 3 57.10 +16.E8J —2.09 3 52.26 19.07J 21 22 Venus . . . S.F. B. A. C. . . 5839 0.5 52.3 13.0 25.5 17.0 37.8 29.5 50.3 42.5 12 6 25.42 12 10 17.21 +16.30J — 2.81 —3 51.79 +19.111 Remarks. It will be seen that the planet was not 3° from the honV.on at the lime of the first observation. During the first five measures the disk was blurred. The distance through which it was necessary to move the micrometer screw rendered absolute stability in the position of the instrument uncertain. 0 B">«<"i. 4 Bctler. c Good. d Sharp. e Da>light. Results. h. m. s. Mean . . Eleven transits . , . . 11 34 47.24 h. in. s. Correction for chronometer at 11 a> . . . —45,11 h. m. A p al 11 36 . . . . m. ». Rev. — 3 53.35 .... +19.066 , Santiago sid. lime S. F. . . . // 0.43 . =6 12.60 h. in. s. 11 34 1.83 AT SANTIAGO DE CHILE. 259 JANUARY 11, 1851. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet — Star. Bar. Thermometers. A. B. C. D. E. A a. A i. Air. Wet. s. s. s. 8. s. ll. III. 8. Rev. m. 8. Rev. Inches. • • la Venus . . . S.I'. 45.0 57. J 10.0 22.5 35.0 11 4 10.00 +15.67} 27.992 58.9 53.6 II B. A. C. . . 5839 43.5 56.0 8.5 21.0 33.5 11 7 8.50 — 5.49 —2 53.50 +21.16i 3 4 5c Venus . . . S.F. D. A. C. . . 5839 Yrniis . . . S.F. 0.6 22.5 13.5 35.0 26.0 24.3 47.5 IIS.I) 36.5 0.0 50.5 49.0 12.5 11 9 2o.72 11 12 24.19 11 14 47.50 +16.66 — 4.59 +16.59 258.47 21.25 Ther. att. 64". 5 Rar. red. to 33° F. 27.895 6 B. A. C. . . 5839 20.8 33.0 45.5 58.0 10.5 11 17 45.56 — 4.68 2 58.06 21.27 7 8 9 Venn-; . . . S.I''. B. A. C. . . 5839 45.5 43.5 55.7 58.5 56.0 8.3 10.8 8.0 20.8 23.5 20.5 33.2 35.8 33.5 45.5 1)1 20 10.82 11 23 8.30 11 25 20.70 +16.59 — 4.73} —16.38 2 57.48 21.32J Venus . . . S.F. 10 B. A. C. . . 5839 53.2 5.5 18.2 30.5 43.0 11 28 18.08 + 4.871 2 57.38 21.25i 11 Venus . . . S.F. 31.5 43.8 8.5 21.5 11 30 56.37 +16.03 13 B. A. C. . . 5839 28.5 41.0 53.5 6.0 18.5 11 33 53.50 - 5.19 —2 57.13 +21.22 Remarks. A fine morning until suddenly interrupted by a dense fog. The images were sharp and measures generally good, a A little blurred. 6 Recorded 8.0s. at wire C. c. Good. Results. li. m. s. Mean .... Six transits . . . . 11 17 28.52 ll. 111. 8. Correction for chronometer at 11 17 . . . — 45.88 m. s. Rev. — 257.78. . . . +21.247 Santiago sid. time S. F h. in. A (i at 11 18 0.79 = 6 54.10 h. m. 8. 11 16 42.64 JANUARY 13, 1851. Chronometer time of transit. Planet — Star. Thermometers. 1 Mean of wires. Micr. Bar. £ Object. A. B. C. D. E. A a. A*. Air. Wet. 0 t. s. 8. e. 8. h. m. s. Rev. m. s. Rev. Inches. • • la Vrnus ... . S.F. 14.3 27.0 39.5 52.0 4.5 11 5 39.46 +18.09 27.983 66.2 60.3 3 B. A. C. . . 5839 20.8 33.2 45.6 58.5 11 7 33.30 — 3.56} —1 53.84 +21.65} 1 Ther. att. lla Venus . . . S.F. 36.5 49.5 . . 13.8 26.5 11 10 1.52 +18.12} 68°. 0 4 B. A. C. . . 5839 30.6 42.6 55.3 7.7 20.3 H 11 55.30 — 3.49 1 53.78 21.61} to 32° F. 27.fc?6 51 Venus . . . S.F. 14.5 : 27.0 39.5 52.0 4.5 11 14 39.50 +18.33} 6 B. A. C. . . 5839 8.0 20.5 33.0 ; 45.8 58.0 11 16 33.06 — 3.31} 1 53.56 21.65 7 \ rims . . . S.F. 22.3 : 34.8 47.3 0.0 12.5 11 19 47.38 +18.251 8 B. A. C. . . 5839 15.5 j 27.8 40.5 53.0 5.2 11 21 40.40 — 3.35 1 53.03 21.57} 9 Venus . . . S.F. 1.5 14.0 26.3 38.8 51.5 11 24 26.42 +18.07} 10 B. A. C. . . 5839 54.5 7.0 19.5 31.8 44.5 11 28 19.46 — 3.51 1 53.04 21.58} lie Venus . . . S F. 8.3 21.0 33.5 46.0 59.3 11 28 33.62 +17.88 13 B. A. C. . . 5839 2.5 15.0 27.5 39.7 53.0 11 30 27.31 — 3.65J —1 53.72 +21.53} 260 INFERIOR CONJUNCTION OF VENUS, 1850-51, JANUARY 13, 1851— Continued. 1 Chronometer time of transit. Micr. Planet — Star. Bar Thermometers. 1 1 Object. A. B. C. D. E. A a. A(J. Air. Wet. £ 6 8. s. s. s. a. h. m. s. Rev. m. s. Rev. Inches. O „ Z . 13 d Venus . . . S.F. 22.8 35.4 47.8 0.3 18.8 11 32 47.82 +17.83} 27.983 66.2 60.3 14 B. A. C. . . 5639 15.5 28.0 40.5 53.0 5.3 11 34 40.46 — 3.74 —1 52.64 +31.571 Ther. att 15 Venus . . . S.F. 45.2 58.0 10.3 22.5 35.0 11 37 10.20 +17.56} 68°. 0 16 B. A. C. . . 5639 37.5 50.3 3.0 15.3 27.8 11 39 2.78 — 4.031 1 52.58 21.60 Bar. red. to 32" F. 27.876 17 e Venus . . . S.F. 45.3 58.0 10.5 22.8 35.2 11 41 10.36 +17.29} 18 B. A. C. . . 5839 38.2 50.3 2.5 15.0 27.3 11 43 2.66 — 4.28 1 52.30 21.57} 19 Venus . . . S.F. 6.5 18.8 31.3 43.6 11 45 18.83 +16.96 30 B. A. C. . . 5839 46.0 58.5 10.8 23.1 35.6 11 47 10.80 — 4.63} 1 51.97 21.591 21 Venus . . . S.F. 56.8 9.2 21.6 34.0 46.5 11 49 21.62 +16.57} 22 B. A. C. . . 5639 49.0 1.5 13.6 25.5 38.3 11 51 13.58 — 5.00 1 51.96 21 .57} as/ Venus . . . S.F. 11.0 23.5 35.8 48.4 0.8 11 53 35.90 +16.22 34 B. A. C. . . 5639 2.5 15.5 28.0 40.3 52.8 11 55 27.82 — 5.36 1 51.92 21.58 25 Venus . . . S.F. 13.8 26.2 38.8 51.2 3.5 11 57 38.70 +15.811 % B. A. C. . . 5839 5.0 17.8 30.5 42.8 55.1 11 59 30.24 — 5.75 1 51.54 21.56} m . Correction for chronometer at 1 1 43 . . . —46.12 h. m. A p at 11 43 m. s. Rev. —152.24 . . . +21.582 Santiago sid. time S.F. . . . 0.44 = 7 0.63 h. m. a. 11 43 8.19 JANUARY 13, 1851. Th. ,ur and planet were too near in A. Ii. ,„ move the micrometer screw thruujl, .. large an arc whlltl they p.«ed across the field. AT SANTIAGO DE CHILE. 261 JANUARY 14, 1851. No. for relVrence. Object. Chronometer lime of transit. Mean of wires Micr. Planet— Slar. Bar. .Thermometers. A. B. C. D. E. A a. A J. Air. Wet. s. B. s. 8. 8. h. ni. s. Rev. e. Rev. Inches. « O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 a 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 312 33 34 35* 36 37 38 39 40 41 42 43 •11 a 46 B.A.C. . . 5S39 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Vrliu.i . . . S.F. B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Vi'lllls . . . S.F. B. A. C. , . 5839 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 47.5 28.5 6.5 48.0 58.5 53.1 35.5 7.8 49.3 25.0 0.0 41.0 19.0 52.5 6.0 20.5 11 16 12.38 11 16 53.68 11 19 31.38 11 20 12.94 11 23 23.42 11 24 5.25 11 26 18.38 11 27 0.58 11 30 32.78 11 31 14.88 11 33 50.17 11 34 32.65 11 38 21.38 11 39 3.88 + 3.20 —13.99 + 3.12 -14.04 + 3.18 — 14.02J + 3.15 —13,96 + 4.08 —13.05 + 4.72 —12.37 + 4.92} — 12.22J + 5.16 —11.96 + 5.39 -11.73 + 5.63} —11.49 + 5.87} —11.20} + 6.13 —11.00 + 6.40 —10.79} + 6.61 —10.56} + 6.85 —10.25 + 7.13} — 9.98 + 7.41* — 9.71 + 7.65J — 9.44 + 7.90 — 9.18 + 8.26 — 8.80 +8.46} —8.56 +8.76 — 8.2f} +9.12 —7.9-1 +41.30 41.56 41.83 42.20 42.10 42.48 42.50 42.70 43.00 43.00 43.30 43.10 43.30 43.80 43.90 44-. 00 43.80 43.80 44.40 44.80 44.60 +44.50 —17.19 17.16 17.20} 17.11 17.13 17.09 17.15 17.12 17.12 17.12} 17.08 17.13 17.19} 17.17^ 17.10 17.11} 17.12} 17.09} 17.08 17.06 17.02} 17.04} —17.06 27.968 Thcr. alt 70° .6 Bar. red to 32' F 27.873 63.0 57.4 • • • • 19.2 13.0 23.5 38.0 30.5 '• • 13.2 25.5 50.5 27.5 40.3 56.5 38.8 9.0 32.5 • • 57.7 • • 16.5 28.8 . . • • 47.2 14.5 57 2 • • . . 11 41 47.20 11 44 14.50 11 44 57.20 11 46 37.30 11 47 20.30 11 49 15.00 11 49 58.00 11 51 49.00 11 52 32.30 11 54 31.10 11 55 14.20 11 57 2.20 11 57 45.50 11 59 17.80 12 0 1.60 12 1 45.50 12 2 29.40 12 4 9.50 12 4 53.50 12 6 39.70 12 7 23.50 12 9 11.00 12 9 54.80 12 11 43.40 12 12 27.80 12 14 5.50 12 14 50.30 12 16 43.20 12 17 27.80 12 1920.10 12 20 4.60 B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 • • • • 37.3 20.3 15.0 58.0 49.0 32.3 31.1 14.2 2.2 • • • • • • 45.5 17.8 1 6 • • , B.A.C. . . 5839 B. A. C. . . 5839 Venus . . . S.F. n. A. C. . . 5839 Venus . . . S.F. II. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. 9 5 • • • • 53.5 39 7 • • • • • • 23.5 11.0 • • • • • • • • 54.8 43.4 27 8 • • • • B.A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5859 Venus . . . S.F. B. A. C. . . 5839 • • • • 5.5 50.3 43.2 S7.8 20.1 • • • • 262 INFERIOR CONJUNCTION OF VENUS, 1850-51, JANUARY 1*, 1851— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometer*. A. B. C. D. E. A a. &s. Air. Wet. 8 s. s. s. s. h. in. s. Ilev. s. Rev. Inches. • • 47 48 49 50 51 5x> 53 54 55 56 B. A. C. . . 5839 • • • • 41.6 26.8 12 21 41.60 12 22 26.80 12 24 5.00 12 24 50.20 12 26 33.00 12 27 18.00 12 29 26.50 12 30 11.50 12 33 23.50 12 34 8.50 +9.34 —7.74 +9.59 —7.42 +9.94J — 7.06J +10 32 — 6.7ei +10.88 — 6.17 +45.20 45.20 45.00 45.00 +45.00 —17.08 17.01 17.01 17. 10J —17.05 27.988 Thcr. all. 70°. 6 I'.ni ird. In 32° F. 27.873 63.0 57.4 B. A. C. . . 5839 Venus S F 5.0 50 2 • • • • B. A. C. . . 5839 Venus . . . S.F. B. A. C. . . 5839 Venus . . . S.F. 18.0 26.5 J1.5 . . B. A. C. . . 5839 • • • • 23.5 8.5 • • Remarks. A remarkably fine morning ; clear, sharp images and good measures throughout, though rather more hurried than is desirable, on account of the distance through which the micrometer screw had to be moved. o Not incorporated into the results. b Daylight. Results. h. m. s. Mean . . Twenty-seven transits . . 11 58 7.39 h. m. s. Correction for chronometer at 11 58 . . . — 47.42 h. m. A f at 11 57 . . . B. Rev. + 43.53 .... —17.104 Santiago sid. time S. F. . . . n 0.29 . =5 33.36 h. m. s. 11 57 19.97 JANUARY 15, 1851. i Chronometer time of transit. Planet— Star. Thermometers. "or refe Object. A. B. C. D. E. A a. A I. Air. Wet. d s. B. 8. 8. 8. h. m. s. Rev. 8. Rev. Inches. • 0 1 Venus . . . S.F. . . 24.5 < . 11 24 24.50 +9.61 27.918 65.5 59.0 2 H. C. . . . 31543 • • • • 56.5 • • • • 11 24 56.50 4.51 —32.00 +5.10 3 Venus . . . S.F. 9 1 Ther. ntt. 4 H.C. . . . 31543 • • 40.6 • • 11 27 40.60 4.70 31.50 5.10 liar. red. to 32° F. 5 Venus . . . S.F. 6 4 27.805 6 H.C. . . . 31543 • • • • 38.0 . . 11 29 38.00 5.14 31.60 5.13 7 Venus . . . S F. . . . t 45.7 11 31 45.70 10.22 8 H.C. . . . 31543 • • 17.3 • . 11 32 17.30 5.13 31.60 5.09 9 Venus . . . S.F. 25.3 11 33 85.30 10.21 10 H.C. . . . 31543 • • 57.0 11 33 57.00 5.14 31.70 5.07 11 Venus . . . S.F. 43.8 11 35 43.80 10.10 12 H.C. . . . 31543 • • • • 15.5 • • . . 11 36 15.50 4.98 31.70 5.12 13 Venus . . . S.F. . . f t 0.6 11 38 0.60 9.95 14 H.C. . . . 31543 32.3 . . . . 11 38 32.30 4.84 31.70 5.11 u Venus . . . S.F. 6.0 11 40 6.00 9.79 16 H.C. . . . 31543 37.1 11 40 37.10 + 1.72 —31.10 +5.07 AT SANTIAGO DE CHILE. 263 JANUARY 15, isr.l CmttliiiK-il. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers A. I). C. D. E. A .->; 1.33 6.11 1.15 5.79 O.HG; 5.55 0.56} 5.41 40.45 —31.00 30.60 30.70 30.60 29.80 30.10 29.70 30.00 29.50 29.50 29.10 29.50 29.40 39.30 28.80 27.70 28.40 28.50 28.50 28.70 28.20 —27.80 45.04} 5.05i 4. 97J 5.02 4.96i 5.06 5.05i 5.031 5.05 4.95} 4.96} 4.95J 4.96 4.99 4.99} 4.96} 4.92} 4.95} 4.96 4.92} 4.981 44.96 27.918 Thnr. an. 70°. 0 Bar. red. to 32° F. 27.805 65.5 59.0 H.C. . . . 31543 Venus . . . S.F. H.C. . . . 31543 44.5 37.3 58.0 43.6 • • • • 11. r. . . . 31543 Venus . . . S.F. H.C. . . . 31543 • • • • 14.2 15.2 45.0 5.0 • • • • H.C. . . . 31543 35.1 13 5 II. C. . . . 31543 • • • • 43.2 11.5 • • Venus . . . S.F. H. C. . . . 31543 • • 41.5 29.4 • • • • H. C. . . . 31543 Venus . . . S.F. H. C. . . . 31543 58.9 20.5 50.0 8.5 • • • • II. C. . . . 31543 • • • • 37.6 7 0 • • H. C. . . . 31543 • • • • 36.5 53.6 • • H.C. . . . 31543 Venus . . . S.F. II. C. . . . 31543 Venus . . . S.F. H. C. . . . 31543 • • • • 23.0 53.3 22.6 59.5 28.3 2.6 • • • • II. C. . . . 31543 • • • • 30.3 14.1 • • H. C. . . . 31543 Venus . . . 8 F. II. C. . . . 31543 • • • • 42.5 3.8 32.3 53.0 21.5 1.3 • • • • Venus . . . S.F. H.C. . . . 31543 H.C. . . . 31513 Venus . . . S.F. H. C. . . . 31543 Venus . . . S.F. H.C. . . . :ii:-,i:i • ' • • 30.0 59.3 27.5 53.0 20.8 • • • • 264 INFERIOR CONJUNCTION OF VENUS, 1850-51, JANUARY 15, 1851— Continued. Remarks. A fair morning only. Until the observation at 1U. 56m., the planet was somewhat blurred and unsteady. a Belter defined and motion more uniform. 4 Daylight. Resulls. h. m. s. Mean . . Thirty transits .... 11 56 9. 68 h. in. s. Correction for chronometer at 11 56 . . . —48.26 h. m. A p at 11 56 . . . s. Rev. — 29.94 .... +5.018 . . Santiago sid. time S. F . 0.09 . =1 37.80 h. in. s. 11 55 21.72 JANUARY 16, 1851. « D Chronometer time of transit. Planet— Star. Thermometers. c VT fw'rp Micr. Bar. m £ Object. A. B. 0. D. E. A a. •A*. Air. Wet. _ d s. s. s. s. s. h. m. s. Rev. m. s. Rev. Inches. 0 0 X 1 B.C. . . . 31543 29.0 41.5 54.0 6.5 18.8 11 21 53.96 +9.03 27.918 64.4 56.5 2 Venus . . . S.F. , . 46.2 58.6 11.0 23.5 11 22 58.60 8.35 +1 4.64 —0.68 Tiler, att. 3 H. C. . . . 31543 51.2 4.0 29.0 11 26 16.35 8.75J 69°. 9 4 Venus . . . S.F. 56.5 9.0 21.5 34.0 46.3 11 26 21.46 8.12; 1 5.11 0.63 l!;ir. n>> Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A I. Air. Wet. h. . s. 5. 8. h. m. B. Rev. m. s. Rev. Inches. • • II. C. . . . 31513 9.5 23.0 31.5 47.0 59.5 12 15 31.50 +4.39 S7.918 61.4 56.5 SI VIMIU.S . . . S.F. 18.3 8B.3 43.0 55.0 8.0 12 16 42.96 3.45t +1 8.46 -0.93i 35 SO 37 II. C. . . . 31513 Venus . . . S.F. II. C. . . . 31543 2.5 11.0 51.0 15.0 23.3 7.2 27.3 33.8 19.7 39.5 •!-. 3 33.2 52.0 0.6 44.6 12 19 27.26 12 20 35.78 12 23 19.66 3.921 8. 92 1 8.52 3.58 1. 001 Thcr. atl. 69°. 9 Bar. red. to 32° F. 27.805 38 39 40 Venus . . . S.F. II. C. . . . 31543 3.7 16.3 1.0 13.5 10.3 23.6 28.6 23.0 35.0 41.0 38.5 47.5 53.5 51.0 0.0 12 23 SS.63 12 25 25.00 12 26 35.08 2.57 3.09 2.03 1 8.96 1 9.08 1.01 1.06 Venus . . . S.F. 41 H. C. . . . 31513 .31.5 44.0 9.0 21.3 122850.40 2.78 48 Venus . . . S.F. 43 0 55.0 7.5 19 8 32.2 12 33 7.30 1.80 1 10.84 0.98 43 II. C 0443 15.3 27.7 40.0 4.8 12 33 40.06 2.2)1 44 Venus . . . S.F. 21.7 37.5 49.8 j 2.3 14.5 12 33 49.76 + 1.211 +1 9.70 — l.CO Remarks. Fine morning; good images and steady motion throughout. Results. h. m. s. m. s. Rev. ' " its . . . 11 57 42.57 + 1 7.13 .... —0.866 .... =0 16.88 in. s. h. m. s. 58 48.66 Santia"0 sid time S. F 11 56 53.91 h. in. A oat 11 56 . 0.01 JANUARY 11, 1851. 1 Chronometer time of transit. Planet— Star. Thermometers. • Micr. Bar. E ,2 U Object. A. B. C. D. E. A a. A i. Air. Wet. a 0 s. s. s. f s. h. m. s. Rev. m. 8. Rev. Inches. • • •f. i H. C. . . 31543 23.5 35.0 47.3 0.0 13.5 11 23 47.46 +6.08 27.935 64.1 58.7 2 Venus . . . S.F. 11.5 24.3 36.5 49.0 i .5 11 26 36.56 —1 .63J +2 49.10 — 7.71J Ther. ntt. 3 II. C. . . . 31543 30.8 43.0 55.5 8.0 20.5 11 2855.56 +5.77 70°. 5 4 Venus . . S.F. 20.1 32.6 45.0 57.5 10.0 11 31 45.04 —1.95 2 49.48 7.72 Bar. red. to 32° F. 27.811 0 H. C. . . . 31543 30.5 43.3 SS.S 8.0 20.5 11 33 55.56 +5.511 6 Venus . . . S.F. 20.3 32.6 45.0 57.5 10.2 11 36 45.12 —2.36} 2 49.56 7.78 7n II. C. . . . 31543 52.0 4.7 17.5 S9.8 42.3 11 40 17.26 +5.21 8 Venus . . . S.F. 42.6 55.0 7.5 20.0 33.5 11 43 7.5J —2.63 2 50.26 7.84 9 H. C. . . . 31543 5.5 18.0 30.3 43.7 55.0 11 45 30.30 +4.67 10 Venus . . . S.F. 55.8 8.S 30.8 33.2 45.5 11 48 20.76 — 3.11J 2 50.46 7.7ft 11 H. C. . . . 31543 50.0 3.3 15. B 28.0 40.5 11 50 15.60 +4.33 12 Venus . . . S F. 41.8 51.3 C.6 19.3 31.5 11 53 6.66 —3.53 251.06 7.86 13 II. <'. . . . 31543 41.5 54.0 0.3 19.0 31.5 11 55 6.50 +3.88 14 Venus . . . S.F. 33.8 45.5 58.0 10.3 23.6 11 57 57.84 —4.02} 2 51 .34 7.901 15 II. C. . . . 31543 • ^ 5 52.0 4.5 16.5 29.3 12 1 4.36 +3.03 16 Venus . . . S.F. 31.0 43.5 56.0 8.5 81.0 i 12 3 56.00 —4.90 +2 51.64 —7.92 266 INFERIOR CONJUNCTION OF VENUS, 1850-51, JANUARY IT, 1851— Continued. OJ Chronumrit'r time of tran>it. rianet— Star. Thermometers, Mean of win's Micr. Bar. Object. A. B. 0. L>. E. A a. A J. Air. Wet. £ 8. 8. 8. 8. H. ll. 111. S. Rev. in. s. Rev. Indies. 0 a 2 17 H. C. . . . 31543 56.0 8.5 21.0 33.2 45.7 12 6 20.88 +2.40 27.925 64.1 56.7 18 Venus . . . S.F. 48.0 0.5 13.0 25.5 38.0 J2 9 13.00 -6.SH +2 52.12 — 7.9SJ Thcr. att. 19 II. C. . . . 31543 11.3 24.0 36.2 48.5 1.9 12 12 36.24 +5.44 70°. 5 20 Venus . . . S.F. 3.8 16.8 29.1 53.7 12 15 28.94_ —2.60 2 52.70 8.04 Bar. red. to 32' F. 27.811 21 H. C. . . . 31543 39.5 52.0 4.5 17.0 29.2 12 18 4.44 +4.17 S3 Venus . . .S.F. 31.5 57.0 9.8 22.3 12 20 57.04 —3.92 2 52.60 p. 09 S3b H. C. . . . 31543 11.0 23.5 36.0 48.5 ' 1.0 12 21 36.00 +3.42 24 Venus . . . S.F. 4.3 17.0 29.5 42.0 54.5 12 28 29.46 —4.03 2 53.46 ; 8.05 25 H. C. . . . 31543 30.7 43.0 55.5 8.0 20.5 12 28 55.54 +3.85 26 Venus . . . S.F. 24.4 37.0 49.5 1.5 14.3 12 31 49.34 —5.23 2 53.60 8.08 27 11. C. . . . 315!3 13.8 23.0 38.5 51.0 3.2 12 34 38.50 +3-214 M Venus . . . S.F. 7.5 20.0 32.5 45.0 57.5 12 37 32.50 —5.87 +2 51.00 — 8.08J Remarks. Somewhat hazy all the morning. Star dim and planet not sharp, a Recorded 2.7s. at wire B. I Daylight. Results. h. m. p. Mean ... Fourteen transits ... 12 1 38.98 h. m. 9. Correction for chronometer at 12 2 . . . — 48.64 h. m. A pat 12 0 . . . m. s. Rev. + 2 51.54 .... —7.914 Santiago sid. time S. F. // 0.15 . =2 34.20 h. in. s. 12 0 50.34 JANUARY 18, 1851. a s Chronometer lime of transit. Planet— Star. Thermometers. £ •» ,. . for refe Object. A. B. C. D. E. A a. A A Air. Wet. 1 s. s. s. s. 8. h. m. s. Rev. m. s. Rev. Inches. • a la 2 Venus . . , S.F. B.C. . . . 31791 38.5 50.8 32.5 3.0 45.0 15.5 57.5 28.0 10.0 11 31 3. 1C 11 33 45.03 +14.90i 5.91 —2 41.87 +8.99J 27.918 63.0 57.4 3o Venus . . . S.F. 44.5 56.8 9.5 22.0 34.3 11 38 9.42 14.64J Ther. att. 68° 0 4 B.C. . . . 31791 26.2 38.5 51.0 3.5 16.0 11 3851.04 5.66 2 41.63 8.E8J Bar. red. to 32° F. Si Venus . . . S.F. 30.6 43.3 55.5 8.0 20.5 11 40 55.58 14.44J 27.801 6 11. C. . . . 31791 24.6 37.0 49.5 1.8 11 43 37.00 5.401 2 41.42 9.04 7 Venus . . . S.F. 20.8 33.5 46.0 58.3 10.8 11 45 45.88 14.10 8 H.C. . . . 31791 • • 14.5 27.0 39.0 51.5 11 48 36.78 5.15J 2 40.90 8.94J 9c Venus . . . S.F. 4.0 10..-, 28.6 41.5 53.5 11 51 98.82 13 80 ' 10 H.C. . . . 31791 44.5 57.3 9.5 22.0 34.5 11 54 9.56 4.771 2 40.74 9.03 lie Venus. . . S.F. 33.6 46.0 58.3 11.0 23.5 11 56 58.48 13.23 12 H. C. . . . 31791 ui.r, S8.0 38.5 51.0 3.S 11 59 38.50 +4.30 —2 40.02 +8.93 AT SANTIAGO DE CHILE. 267 JANUARY IS, 1851— Continued. No. for reference. Object. Chronometer time of transit. Wean of wire* Mier. Planet— Star. Bar. Thermometers. A. 11. C. D. E. A a. 63. Air. Wet. 8. H. 8. s. y. ll. HI. S. Rev. m. s. Rev. Inches. - • 136 14 15.1 16 17 i Venus . . . B.F. 11. C. . . . 31791 23.3 3.0 37.5 17.0 8.0 35.8 15.5 50.3 29.5 20.8 18,3 28.0 2.6 33.3 0.8 40.5 15.2 54.5 45.5 13.2 53.0 27.6 58.1 12 1 48.28 12 4 28.00 12 7 2.64 12 9 41.96 12 12 33.14 +12.99 4.03 12.31J 3.41 12.30 —2 39.72 2 39.32 +8.96 8.90J 27.918 Tlicr. alt. 68° .0 Bar. red. to 32° P. 27.801 63.0 57.4 Venn* . . . S.F. II. C. . . . 31791 Venus . . . t-.F. 18 11. C. , . . 31791 47.5 59.8 12.0 36.8 12 15 12.11 3.48 2 38.97 8.82 19 \enus . . . 8.F. 53.0 5.5 17.8 30.3 42.8 12 17 17.88 11.90 20 B.C. . . . 31791 31.3 43.8 56.5 9.0 21.0 12 19 56.32 +2.98 —2 38.44 +8.92 Remarks. No ^oo/ Venus . . . S.F. 47.3 59.5 12.0 24.5 37.2 12 4 12.10 11.95 20 B.C. . . . 31931 23.5 36.0 48.5 1.0 13.3 12 6 48.46 !5.06j 2 36.36 3. 11J 31 Venus . . . S.F. 50.8 3.5 15.7 28.2 40.8 12 9 15.80 11.43 33 B.C. . . . 31931 26.5 39.0 51.3 4.0 16.5 13 11 51.46 14.59 2 35.66 3.16 23 Venus . . . S.F. 34.3 46.8 59.5 11.8 24.3 12 13 59.34 10.80 24 Il.C. . . . 31931 10.0 22.3 34.6 47.0 59.5 12 16 34.68 14.03 2 35.34 3.23 25 Venus . . . S.F. 13.5 26.0 38.5 51.0 3.3 12 18 38.46 10.30 26 B.C. . . . 31931 48.5 1.0 13.0 25.5 38.0 12 21 13.20 13.53| 2 34.74 3.231 27 Venus . . .S.F. 59.5 12.0 24.5 36.8 49.2 12 23 24.40 9.63 28 B.C. . . . 31931 31.0 46.5 58.8 11.1 23 5 12 25 58.78 12.89 2 34.38 3.26 29 Venus . . . S.F. 0.8 13.5 25.7 38.0 50.5 12 28 25.70 9.00J 30 B.C. . . . 31931 35.0 47.4 59.8 12.1 24.5 12 30 59.76 12.29 2 34.06 3.28J 31 e Venus . . . S.F. 10.3 22.5 35.0 47.5 59.8 12 33 35.02 8.40 32 B.C. . . . 31931 43.5 56.0 8.5 21.0 33.5 12 36 8.50 11.74 2 33.48 3.34 33 Venus . . . S.F. 9.0 21.6 34.0 46.5 59.0 12 40 34.02 7.50 34 Il.C. . . . 31931 41.5 54.5 7.0 19.5 31.5 12 43 6.80 10.90 2 32.78 3.40 35 Venus , . . S.F. 35.5 48.3 0.5 13.0 25.4 12 45 0.54 7.02J 36 H. C. . . . 31931 10.3 23.0 35.5 48.0 0.5 12 47 35.46 +10.47 —2 34.92 —3.44i 1 Remarks. Rarely a good measure (luring the whole inoining, the motion of the planet being wavy, a Blurred. b Better. c Tolerably shai p. d Sharp and good. c Daylight. Results. h. m. s. Mean . . . Eighteen transits . . . 12 1 38.13 h. in. E, Correction for chronometer at 12 2. . . 47.81 h. in. A p at 12 2 . . . in. s. Rev. -2 36.51 .... —3.085 Santiago sid. time S. F. . . . O.OG h. m. s. 12 0 50.32 JANUARY 21— 83, 1851. Xo attempt was made to measure the uitVerenccs on tin- Slst, 2v!d, uml 23,1, the slur being too distant in declination to move the imciomcler screw through the space whilst the object! wore passing across the field. AT SANTIAGO DE CHILE. 269 JANUARY 84, 1851. No. for reference. Object. riminoiiii'lrr nine' of transit. Mrauof wiri's. Micr. rianct— Star. Bar. Thermometers. A. I). C. D. E. A a. A«, Air. VVM. B. 8. S. 8. s. h. m. s. Rev. m. s. Hev. Indies. • • J Venus . . . S.P. 41.0 53.6 6.0 . . 31.0 11 48 5.99 +15.48J 27.886 64.6 58.5 2 Taylor . . . 8219 22.0 35.0 47.5 59.8 12.4 11 54 47.34 6.30 -6 41.35 +9.18J 3 4 5 Venus . . . S.F. Taylor . . . 8219 Venus . . . S.F. 43.3 1.3 55.6 36.5 14.2 8.1 48.7 26.5 20.6 1.0 38.9 33.0 13.5 51.5 11 57 8.12 12 3 48.68 12 6 26.48 14.71 5.56J 13.88 6 40.56 9.17J Ther. nil. 70°. 5 Bar. red to :!•>' F. 27.772 6 Taylor . . . 8219 41.0 53.5 5.8 18.3 31.0 12 13 5.92 4.74 6 39.44 9.14 7o Venus . . . S F. 38.5 51.0 15.5 28 .S 12 15 3.25 12.86 8 Taylor . . . 8319 16.8 29.5 41.8 54.0 6.5 12 21 41.72 3.88 6 38.47 8.98 i Venus . . . S.F. 47.5 0.0 12.5 24.5 37.3 12 24 12.36 11.88 10 Taylor . . . 8219 25.0 37.5 .VI. II 2.5 15.0 12 30 50.00 2.91 6 37.64 8.97 114 Venus . . . S.F. 41.2 54.0 6.5 18.6 31.2 12 33 6.30 10.71 12 Taylor . . . 8219 18.0 30.8 43.0 55.5 8.0 12 39 43.06 1.87 6 36.76 8.84 13 Venus . . . S.F. 29.5 42.2 54.5 7.0 19.5 12 41 54.54 9.56 14 Taylor . . . 8219 5.5 18.0 30.3 42.5 55.3 12 48 30.32 0.79 6 35.78 8.77 15c Venus . . . S.F. 20.3 32.8 45.2 57.6 10.0 12 50 45.18 + 8.31J 16 Taylor. . . 8219 55.0 7.5 20.0 32.5 45.0 12 57 20.00 — 0.35 6 34.82 8.66J 17 d Venus . . . S.F. 44.2 56.5 9.0 21.5 12 59 56.56 + 7.09J 18 Taylor. . . 8219 12.5 25.0 37.5 50.0 2.7 13 6 37.54 — 1.55 —6 40.98 +8.64J Remarks. Fine morning. Images good and motion equable. Cirri prevented earlier measures. There.is a small star preceding the planet 4t. or St., which at the commencement, was recorded as below it. a Very good measures. c Planet certainly south of the preceding star. 6 Planet's south limb and the preceding star precisely d Daylight. Rejected this pair, on the same parallel. Diameter of Venus from a mean of 10 measures, by daylight, at 13A. 15m. sid. time, 2.059 rev. Corrected diameter, 38". 00. Results. h. tn. s. Mean . . Eight transits 12 19 35.28 h. s. s. Correction for chronometer at 12 i!0 . . . . — 49.50 in. s. Rev. — 6 38.10 .... +8.966 . . Santiago sid. time S. F. = 2 54.75 ll. 111. s. 12 18 45.78 h. m. A pat 12 22 0.14 JANUARY •::,. 1891. Cirri prevented the morning observation*. 270 INFERIOR CONJUNCTION OF VENDS, 1850-51, JAXUARY 36, 1831. No. for reference. Object. Chronometer lime of transit. Mean of wires Mier. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A 7<>'i 33.5 46.0 58.6 11.0 23.5 12 25 58.52 —4.221 6 14.02 8.701 7 a. li. 111. a. Rev. III. B. Rev. Inches. • • 1 Venus . . . S.F. 45.4 57.7 10.3 22.6 35.5 12 4 10.30 +5.87 28.043 62.2 55.6 2 H. C. . . . 32706 10.5 23.0 35.5 48.2 0.5 12 7 35.54 10.541 —3 25.24 — 4.67J 1'her. all. 3 Venus . . . S.F. 11.5 24.1 36.6 39.0 1.5 12 9 36.54 5.90 68°. 5 4 II. C. . . . 32706 ge.o 48.5 1.0 13.5 26.0 12 13 1.00 10.66 3 21.46 4.76 Bar. red. 27.935 5 Venus . . . S.F. 28.5 41.2 53.6 6.0 18.8 12 11 53.62 5.43 6 H. C. . . . 32706 52.5 5.0 17.5 30.6 42.5 IS 18 17.62 10.25 3 24.00 4.82 7 Wniis . . . S.F. 58.5 11.0 23.5 36.0 .1-.:, 12 20 23.50 ' 4.97 8 H. C. . . . 32706 21.5 31.2 46.5 59.0 11.9 12 -33 46.62 +9.801 —323.12 1.831 272 INFERIOR CONJUNCTION OF VENUS, 1850-51, JANUARY 38, 1851-Continued. No. for reference. | Object. Chronometer time of transit. >lran of wires 'Slier. Planet — Star. Bar. Thermometers. A. B. C. ' D. E. A a. A<5. Air. Wet. B. s. s. s. . s ll. 111. S. Rev. 111. S. Rev. Inches. O • 9 vcnus . . . S.F. 57. a 9.6 . 22.3 34.8 47.0 12 26 22.18 +4.27 28.043 62.2 55.6 10 11. C. . . . 32706 20.0 32.5 45.0 57.5 10.0 12 29 45.00 9.18J —3 22.82 — 4.91J 11 12 13 V.MII1S . . . P.F. II. C. . . . 32706 Venus . . . S.F. 23.0 45.0 0.5 33.5 57.:, 13.0 48.0 10.0 25.5 0.5 22.4 33.0 13.0 35.0 50.3 12 31 4S.OO 12 35 9.98 12 37 25.46 3.61J 8.57 2.9:l; 321.98 4.95J Tlior. an. 68°. 5 Bar. red. to 33° F. 27.935 14 II. C. . . . 3S706 21.5 34.0 46.5 59.0 11. 5 13 40 46.50 7.93 3 21.04 4.98J I.', :, \finn . . . S.F. 21.5 34.0 40.5 59.0 11.5 12 42 46.50 2.28 16 II. C. . . . 32706 43.0 54.5 7.0 19.5' 33.0 12 46 7.00 7.27 3 20.50 4.99 17 Venus . . . S.F. 33.4 46.0 58.5 11.0 23.5 12 47 58.48 1.56 11 II. C. . . . 32706 53.5 6.0 IS. 5 30.5 43.5 12 51 18.40 6.58 3 19.92 5.02 19 Venus . . . S.F. 2.0 14.6 27.2 39.8 52.3 12 53 27.18 0.73 30 II. C. . . . 32706 21.0 34.0 46.3 58.8 11.5 12 56 46.33 5.83 3 19.14 5.10 21 Venus . . . S.F. 58.5 11.3 23.6 36.0 48.7 12 59 23.63 7.24 22 H.C. . . . 32706 17.5 30.0 42.5 55.0 7.5 13 2 42.50 12.38 3 18.88 5.14 . 935 Venus . . . S.F. 11.3 24.0 36.5 49.0 1.5 13 5 36. 40 5.39 24 H.C. . . . 39706 35.5 1.0 13.3 26.0 13 9 0.82 10.66J 3 21.43 5.27J 25 26 27 Venus . . '. S.F. H.C. . . . 32706 11.2 28.0 7.0 24.0 40.5 19.5 36.5 ' 53.0 32.0 49.0 6.0 44.4 1.5 18.5 56.8 13 12 36.44 13 15 53.20 13 18 31.94 4.22 9.52J 3.Q5 3 16.76 5.30J - Venus . . . S.F. 28 H.C. . . . 33706 23.0 35.8 49.0 0.5 13.0 13 21 48.06 +8.64 —3 16.12 —5.39 Remarks. This has not proved a very good morning, as the planet was Hating, and the cusps never sharp. a Measures a little close. b There has evidently been a slip in the instrument, and this observation has been rejected. Diameter of Venus from n mean of 10 measures at 13A. 30m. sul. time, 1.991 rev. Corrected diameter 36". 60. Results. h. m. s. Mean . . . Thirteen transits . . . 123824.90 h. m. s. Correction for chronometer at 12 38 . . . —51.32 h. m. A p at 12 : m. s. Rev. — 321.07 . . . . —5.045 Santiu go sid time S. F. . . . 0.07 h. m. f. 12 37 33.58 From the 29th of January to the 2d of February, both days included, it was cloudy at the hours for observing Ventn. FEBRUARY 4, 1851. Also cloudy. AT SANTIAGO DE CHILE. 273 . — — FKHKtrARV 5, 1*51. u Chronometer time of transit. Planet Star. Thermometer*. | Object. A. 11. C. I). E. .'.v.tuiui MIH-^. iviur. A a. A* Bar. Air. \Vn. .; i. a. 9. B. S. ll. 111. S.' li.'V. s. Rev. Inehes. • a 1 l.i Venus . . . S F. 49.5 . . . . 12 i!l 49.50 • 28.065 60.9 56.7 3 11. 0. . . . . 33398 28.8 13 22 28.80 10.05 —39.30 •+2.88 Tlier. att. 3 Venm S F 45.0 12 23 45.00 13. 13} J?=o A • 4 II. C. ... 23.5 12 24 23.50' 38.50 2.92 DO .1 llnr. red. to 32° F. 27.965 5 Venus . . . S.F. . . 44.5 57.0 . . 12 35 57.00 12.99} 6 II. C. . . . 33598 • • 33.0 35.5 • ' • • 12 26 35.50 10.16 38.50 ' 2.83} 7 Venus .^ . . S.F. 43.7 56.0 • . 12 27 56.10 12.90 8 H.C. . . . 33598 23.0 34.5 12 28 34.50 10.11} 38.40 2.78} '.I/' Venus . . . S.F. 7.0 19.-5 ( . . 10 .'10 19.50 12.h:2 10 II. C. . . 45.0 57.3 . . i-j :a 57. .MI 9.96}. 38.00 2. 85J- 11 Venus . . • . S.F. 80.3 11.7 . 12 3i 41.75 ,.,,,;(,; H II. C. . . . 33598 6.6 19.0 • • 12 33 19.05 .9.84 37.30 2.76} 13 Venus . . . N.F. 18.0 30.5 12 35 :tll.5l) 14.31J 14 H.C. . . . 33598 55.0 8.0 • • 12 36 7.75 9.72 37.23 4.59} lie . . . S.F. Y.5 20.1 . , 12 38 20.05 12.17} 16 H.C. . . . 33598 • • 44.5 57.0 • ' 12 38 57.00 9.50} 36.93 2.67 17 Venus . . . N.F. 44.3 56.5 t . 12 40 56.65 13.72 18 II. C. . . . 33598 20.5 33.0 12 41 33.00 9.20 36.35 4.52 Hi Venus . . . S.F. 45.8 58.2 f 13 44 58.35 11.50} 20 H. C. . . . 335U8 • • 21.5 34.0 • • 12 45 34.00 8.76 35.75 2.74} 21 Venus . . . N.F. . . 58.5 11.0 , t ' . . 12 47 11.00 13.03} ^ 32 H. C. , . . 33598 • • 34.2 46.5 • • . . 12 47 46.60 8.56} 35.60 4.47 • 23 Venus . . . S.F. . . 53.5 6.0 . . . . 12 50 6.00 11.63 24 .H.C. . . . 33598 28.5 41.0 . . 12 50 41.00 9.00 35.00 2.63 25 Vrniis ... . N.F. . . 6.5 18.8 t 12 53 18.90 13.16} 26 H.C. . . . 33598 41.3 53.5 , , IS 53 53.65 8.75 34.75 4.41} 1 i 27 Venus . . . S.F. 21.3 35.6 . t 12 54 36.70 11.12 1 28 H.C. . . . 33598 58.8 11. a • • • • 12 55 11.25 8.49} 34.55 3.62} 29 Venus . . . N.F. 46.0 58.5 . 12 56 58.50 12.57 30 H.C. . .. . 33598 • • 20.1 32.5 . . 12 57 32.55 8.18 34.05 4.39 31 e Venus . . . S.F. 3.6 16.0 t ^ . 12 59 16.05 10.44} 32 H.C. . . . 33598 • • 37.5 50.0 • • • • 12 59 50.00 7.90 33.95 3.54} 33 Venus . . . N.F. . , 36.7 49.0 . 13 1 49.10 12.01 34 II. C. . . . 33598 • • 10.5 32.5 • • • • 13 2 22.75 7.63} 33.65 4.37} »/ Venus: . . . S.F. . 42.8 55.3 . . 13 3 55.30 9.92 36 H.C. . . . 33398 • • 16.0 28.2 .... 13 4 28.35 7.40} 33.05 3.51} 37 Venus . . . N.F. t 53.8 6.2 . 13 7 6.25 11.23} 38 H. C. . . . 33598 • • 36.5 39.0 51.8 • • 13 7 39.00 6.93 32.73 4.30} 39 Venus . . .S.F. 46.0 58.5 . . 13 9 58.50 9.00} •HI H.C. . • . 33598 • • 18.0 30.5 • • 13 10 30 50 6.61} 32.00 2.45 41 Venus . . . N.F. 9.5 21.8 . 13 12-21.90 10.46} 42 II. C. :;;r/i-' • • 41.5 53 8 6.2 • • 13 12 53.84 6.31 31.94 4.25} •13 Venus . . . P.F. . 37.5 13 15 37.50 44 II. C. . . . 33598 56.5 9.0 13 10 9.00 5.86 31.50 2.46 45 g Venus . . . N.F. . 51.8 4.5 . 13 18 4.40 46 II. I1. . . . 33598 23.7 36.3 • • • • 13 18 36.25 +5.55J —31.85 +4.21 • 35 274 INFERIOR CONJUNCTION OF VENUS, 1850-51, FEBRUARY 5, 1851— Continued. V Chronometer time of transit. Planet— Star. Thermometers. Menu of wires JVlicr. Bar. •r Object. A. B. C. D. E. A a. Ali:irp. c Sharp and good. d Very sharp. c Recorded 9.6s. at wire C. / l);i\ liylit measures. g Recorded 3.0s. at wire C. h Recorded 7.5«. at wire C. t Recorded 53.0s. and 5.0s. at wires C and D. Diameter of the planet from a mean of 10 measures, at 14A. 32m, sid. lime, 1 .704 rev. Corrected diameter, 31". 01. ^Results. Mean S, F. . . Twenty-five transits Mean N. F. . . Twenty-five transits h. m. Correction for chronometer at 13 26 , Correction for chronometer at 13 31 . A N. S. limbs mirr. in rev. . . . Variation of declination in 4m. 24s. . Corr. for diam. of micr. wires . . , Observed N. S. diameter .... h. in. s. s. Rev. / ii . 13 26 26.95 — 33.23 .... +5.379 . . . . =1 44.84 . 13 30 50.60 — 32.77 . . . . H -7.123 . . . . =2 18.81 s. li. m. >. . . —54.115 ismliago sid. time forS. F . 13 25 32.90 . . —54.05 Santiago sid. time for N. F . 13 29 56.55 4 23.65 it li. in. 1.743 = 33.97 A f at 13 26 . . . . . . . 0.06 + 0 63 . . . 0.07 — 2.20 'M. 40 278 INFERIOR CONJUNCTION OF VENUS, 1850-51, FEBRUARY 7, 1851. | Chronometer time of tiaiuit. Micr. Planet— Star. Oar Thermometers. 1 Object. A. 11. 0. D. E. An. A<5. Air. Wet. 6 s. S. 8. s. s. h. in. s. Rev. m. s. Rev. Inches. • • 1 H.C. . . . 33748 39.5 52.0 5.0 17.0 29.5 "12 15 4.60 +15.70 28.030 66.4 59.2 2a Venus . . . S.F. 28.2 40.5 53.2 6.0 18.5 12 17 53.28 11.55 +2 48.68 -4.15 Ther. alt 3 H.C. . . . 33748 47.6 0.5 13.0 25.5 38.0 12 20 13.92 15.57} 70°3. 4 Venus . . . N.F. 37.0 49.5 2.5 15 0 27.5 12 23 2.30 13.15 2 49.38 3.42} Bar. ml. to 32° F. 27.916 5 H.C. . . . 33748 53.2 10.5 23.2 35.8 48.5 12 28 23.21 15.18 6t Venus . . . S.F. 48.8 1.5 14.0 28.5 39.5 12 31 14.06 10.96 2 50.82 4.22 7 H.C. . . . 33748 45.2 58.0 10.2 23.0 35. '5 12 33 10.38 15.03 8 Venus . . . N.F. 36.5 49.0 1.6 14.3 23.8 12 36 1.64 12.47 2 51.26 2.56 9 H. C. . . . 33748 43.2 55.6 8.1 20.6 33.5 12 38 8.20 14.55} 10 Venus . . . S.F. 35.4 47.8 0.4 12.7 25.5 12 41 0.36 10.26 2 52.16 4.29} 11 H. C. . . . 33748 31.2 44.0 56.5 9.0 21.7 12 42 56.48 14.13 12 Venus . . . N.F. 24.0 36.5 49.2 1.8 14.5 12 45 49.20 11.50 2 52.73 2.63 H H.C. . . . 33748 19.5 33.0 44.5 57.0 9.5 12 47 44.50 13.68 . 14 c Venus . . . S.F. 13.0 25.5 38.0 50.5 3.5 12 50 38.10 9.25 2 53.60 4.43 15 II. C. . . . 33748 2.5 15.0 27.5 40.5 53.0 12 53 27.70 13.08} 16 Venus . . . N.F. 57.0 9.5 23.5 34.8 47.5 12 56 22.26 10.33} 2 54.56 2.75 17 H. C. . . . 33748 49.0 1.5 14.1 26.6 39.2 12 58 14.08 12.51} 18 Venus . . . S.F. 44.0 56.8 9.2 21.5 34.5 13 1 9.20 8.03 2 55.12 4.46} 19 H. C. . . . 33748 17.5 30.0 42.3 54.6 7.5 13 3 42.38 11.81} 20 Venus . . . N.F. 13.2 25.7 38.3 50.6 3.5 13 6 38.26 9.09 2 55.88 2.72} t 31 H. C. . . . 33748 41.5 54.5 7.0 19.5 32.0 13 9 6.90 11.12} • Venus . . . S.F. 38.5 51.2 3.7 16.3 28.6 13 12 3.66 6.63} 2 56.76 4.49 33 H. C. . . . 33748 3.5 16.0 28.5 41.0 53.5 13 14 28.50 10.40 24 Venus . . . N.F. 0.5 13.5 25.9 38.5 51.0 13 17 25.88 7.521 2 57.38 2.87} 25 H.C. . . . 33748 21.0 33.5 46.0 58.5 11.0 13 19 46.00 9.76} 26 Venus . , . S.F. 19.3 32.0 44.5 56.8 9.3 13 22 44.38 5.191 2 58.38 4.57 27 H. C. . . . 33748 51.0 3.5 16.0 28.5 41.0 13 25 16 00 9 25 28 Venus . . . N.F. 50.2 2.5 15.1 27.7 40.3 13 28 15.16 6.30 2 59.16 2.95 29 H. C. . . . 33748 34.6 47.0 59.5 12.0 24.5 13 30 59.52 8.23} 30 Venus . . . S.F. 34.0 46.5 59.0 11.5 24.5 13 33 59.10 3.55 2 59.58 4.68} 31 H. C. . . . 33748 44.2 57.0 9.5 22.0 34.5 13 36 9.44 7.64 33 Venus . . . N.F. 45.3 10.5 23.0 35.0 13 39 10.31 4.55 3 0.87 3.09 33 H. C. . . . 33748 51.5 4.5 17.0 39.8 42.2 13 43 17.00 6.41 34 Venus . . . S.F. 53.5 6.5 19.0 31.5 44.0 13 46 18.90 1.63} 3 1.90 4.77} 35 H. C. . . . 33748 20.6 33.1 45.5 58.3 13 48 33.10 5.60 36 Venus . . . N.F. 10.5 23.0 35.5 48.0 0.5 13 51 35.50 2.50} 3 2.40 3.09} 37 H. C. . . . 33748 52.5 5.2 . 30.0 42.5 13 55 17.50 13.17} 38 Venus . . .S.F. 55.0 8.5 21.0 33.5 46.2 13 5821.01 8.32} 3 3.51 4.85 39 H. C . . . 33748 2.0 15.0 27.3 39.8 52.5 14 0 27.32 12.37} 40 Venus . . . N.F. 6.4 19.0 31.5 44.0 56.5 14 3 31.48 9.16 3 4.16 3.21} 41 d 42 II. C. . . . 33748 Venus . . . S.F. 29.0 34.0 41.5 54.0 59.0 6.5 11.5 19.0 24.3 14 5 54.00 14 8 59.06 11.40} 6.49 3 5.06 4.91} 28.030 65.0 58.5 43 H. C. . . . 33748 58.5 11.0 23.3 35.8 48.2 14 11 23.36 10.56 Ther. att. 44 Venus . . . N.F. 3.8 16.7 29.0 41.5 54.3 14 14 29.08 7 29 3 5.70 3.27 68". 8 Bar. red. to 32° F. 45 H.C. . . . 33718 4.2 16.7 29.0 41.5 14 10 16.58 10.12} 27.931 46 Venus . . . S.F. 58.0 10.5 23.0 85.3 48.2 1 1 III -J3.01 +5.11J +3 6.46 —5.01 AT SANTIAGO I)E CHILE. 279 No. fur reference. FEBRUARY 7, ISr.l O.iiHiinnl. Object. Chronometer time of ir.u Menu o! u [fee. Micr. Plain I— Star. Bar. Thermometers. A. B. C. D. E. A a. A I. Air. Wet. 8. s. 8. s. a. ll. lit. 8. Rev. in. s. Rev. Inches. • • 47 48 II. C. . . . 33748 Venus . . . N.F. 58.6 4.3 11.5 17.0 24.0 29.3 88.0 41.0 49.0 'l4 21 16.91 14 24 23.92 + 9.03 + 5.66} +3 7.01 — 3.36J 28.030 65.0 MJ Remarks. There could not well have been a finer morning, and there were clean images and good measures without exception. a Somewhat blurred ami unsteady. c Motion wavy. /• Sharp and steady. d Daylight measures. Diameter of" the planet from a mean of 10 measures, at \\h. 30m. sid. time, 1.723 rev. Corrected diameter, 31". 43. Results. h. m. s. Mean S. F. . . Twelve Irani-its . . . 13 18 38.68 Mean N. F. . . Twelve transits . . . 13 24 40.41 li. m. 9. Correction for chronometer at 13 19 . . . . —53.43 Correction for chronometer at 13 25 . . . . — 53.43 A N. S. limbs micr. in rev 1.658=32.31 Variation of declination in 6m. St. . . + 0.78 Cort. for diiim. of rnicr. wires . ... — 2.20 Observed N. S. diameter 30.69 m. s. + 2 57.67 + 2 58.37 Rev. — 4.571 — 2.913 I . = 1 29.09 . =056.78 h. m. H. Santiago sid. time S. F 13 17 45.25 Saulim-ii sid. tune N.F 132346.98 Interval 6 1.73 h. m. " A p at 13 17 0.06 A p at 13 23 0.03 FEBRUARY 10, 1851. J> o Chronometer time of transit. Planet— Star. Thermometers. c vf • f ' M' Bar. £! S i ft Object. A. B. C. D. E. A a. A A Air. Wet. <£ 6 s. s s. 8. 8. h. in. B. Rev. m. s. Rev. Inches. 0 • 2 In Taylor . . . 8533 9.5 22.0 34.5 47.5 59.8 12 33 34.66 + 16.95 28.032 58.9 53.4 2 Venus . . . S.F. 49.5 2.3 14.8 27.4 39.8 19 35 14.76 15.51} +2 40 10 —1.43} Tlicr. att. •Ja Taylor. . . 8533 52.5 5.3 17.5 30.3 42.5 12 37 17.63 16.84} 65°. 9 4 Venus . . . N.F. 33.5 46.1 58. G 11.2 24.0 12 39 58.68 17.00 2 41.06 +0.15} Bar. red. to 32° F. 27.921 5 Taylor . . . 8533 3.5 16.5 29.0 41.5 54.0 12 42 28.90 16.4.H 6 Venus . . . S.F. . 10.5 23.2 35.6 12 45 10.56 14.94 2 41.66 —1.51} 7 Taylor . . . 8533 9.0 21.6 34.1 46.5 59.5 12 47 34.14 16.05 8 Venus . . . N.F. 51.5 4.0 16.5 29.2 41.6 12 50 16.56 16.18 2 42.42 +0.12 9 Taylor . . . 8533 47.5 0.3 13.2 25.6 38.1 12 53 12.94 16.55} 10 Venus . . . S.F. 31.0 43.8 56.2 8.8 21.4 12 55 56.24 14.90} 2 43.30 —1.65 11 Taylor . . . 8533 8.8 21.5 34.0 48.6 59.5 12 58 34.08 14.96 12 Venus . . . N.F. 53.0 5.5 18.5 30.5 43.5 13 1 18.20 15.04} 2 44.12 +0.08} 13 Taylor . . . 8533 56.0 8.5 ai.o 33.5 46.0 13 4 21.00 14.37 14 Venus . . . S.F. 40.8 53.3 6.0 18.5 31.0 13 7 5.92 12.66 2 44.92 —1.71 156 Taylor . . . 8533 48.5 1.5 14.0 26.5 39 2 13 9 13.94 13.46} 16 Venus . . . N.F. 34.5 47.0 59.5 12.5 25.0 13 11 59.70 13.36 2 45.76 0.10} 17 Taylor . . . 8533 24.7 37.5 49.8 2.5 15.0 13 14 49.90 12.70 18 Venus . . . S.F. 11.3 34.0 49.0 1.5 13 17 36.39 10.96} 2 46.49 1.73} 19 Taylor . . . 8533 38.0 50.8 3.5 16.0 28.4 13 23 3.34 11.76} 20 Venus . . . N.F. 26.0 • • 51.0 3.5 16.3 13 25 51.03 +U.C.T; +2 47.69 —0.09 280 INFERIOR CONJUNCTION OF VENUS, 1850-51, frEBRtJARY 10, 1851— Continued. • reference. Object. Clironoim t'T time of tran.-it. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. AJ. Air. XVet. £ o 8. g s. g. s. h. in. s. Rev. in. s. Rev. Inches. • • <• 21 Taylor. . . 8533 59.0 11.5 24.0 36.5 49.5 13 28 24.10 +11.03 28.019 56.2 52.5 32 Venus . . . S.F. 47.5 0.5 13.0 25.2 33.0 13 31 12.84 9.21J +2 48.74 —1.81} Ther. att. 23 c 24 Taylor. . . 8533 Venus . . . N.F. 12.5 2.5 25.1 15.3 37.7 27.6 50.3 40.3 2.5 53.5 13 35 37.62 13 38 27.64 10.41 10.22 2 50.02 0.19 64°. 5 Bar. red. to 32° F. 27.923 as Taylor . . . 8533 28.5 41.0 53.5 6.0 18.5 13 40 53.50 9.6 ij 36 Venus . . . S.F. 19.0 31.5 44.0 58.6 9.3 13 43 44.08 7.76 2 50.58 1.88J 37 Taylor . . . 8533 56.5 9.3 21.5 34.0 46.5 13 46 21.56 8.795 28 Venus . . . N.F. 48.0 0.5 13.2 25.6 38.0 13 49 13.03 8.56 2 51.50 0.23; 29 Taylor . . . 8533 54.0 6.5 19.3 31.5 44.0 13 51 19.06 8.09J- 30 Venus . . . S.F. 46.3 59.0 11.5 23.7 36.5 13 54 11.40 6.18 2 52.34 1.91J 31 Taylor. . . 8533 28.0 40.7 53.1 5.6 18.3 13 56 53.14 7.33 32 Venus . . . N.F. 21.0 33.5 46.0 58.6 11.2 13 59 46.05 7.06 2 52.92 0.27 33 Taylor . . . 8533 19.8 33.5 45.0 57.5 10.0 14 1 44.96 6.60J 34 Venus . . . S.F. 13.5 26.5 39.0 51.3 3.8 14 4 38.82 4.62 2 53.86 1.98J 35 Tajlor . . . 8533 9.0 21.5 34.3 46.8 59.3 14 6 31.18 5.92J 36 Venus . . . N.F. • • 16.5 29.0 41. 5 54.0 14 9 28.97 5.53J 2 54.79 0.39 37 Taylor . . . 8533 3.2 15.5 28.1 40.6 53.0 14 11 28.08 5.21 38 Venus . . . S.F. 58.4 10 7 23.5 36.0 48.5 14 14 23.42 3.15 2 55.34 2.06 39 Taylor . . . 8533 1.0 13.8 26.1 38.6 51.2 14 16 26.14 4.47.J 40 Venus . . . N.F. 57.0 9.5 22.3 34.6 47.3 14 19 22.08 4.00J 2 55.94 0.47 41 d Taylor . . . 8533 2.0 14.5 26.8 39.5 51.8 14 22 26.92 3.55 42 Venus . . . S.F. 58.5 11.2 24.0 36.5 48.8 14 25 23. 80 1.42 2 56.88 2.13 43 Taylor . . . 8533 51.3 4.8 16.5 29.0 41.5 14 27 16.62 2.74 44 Venus . . . N.F. 49.0 1.5 14.3 26.6 39.2 14 30 14.12 2.31J- 2 57.50 0.42i 45 Taylor. . . 8533 59.5 12.0 24.6 37.1 49.8 14 32 24.60 8.48 46 Venus . . . S.F. 58.2 10.7 23.2 35.7 48.3 14 35 23.22 6.30 2 58.62 2.18 47 Taylor . . . 8533 36.8 2.0 14.6 27.0 14 37 1.96 7.86 48 Venus . . . N.F. 36.0 48.5 1.2 13.6 26.3 14 40 1.12 +7.28 +2 59.16 —0.58 Remarks. The first part of the morning was only fair, but the last thirteen measures have been good, a Blurred and unsteady. c Good. I Tolerably sharp and good. d Daylight measures. Diameter of Venus from a mean of 10 measures, at 144. 49m. sid. time, 1.626 rev. Corrected diameter, 29". 49. B Results. h. m. s. rn. s. Eev. / // Mean S. F. . . Twelve transits . . . 13 35 50.12 — 2 49.40 .... —1.834 . . . . =0 35.75 Mean N. F. . . Twelve transits . . . 13 46 19.77 — 2 50.24 .... —0.199 . . . . =0 3.89 h. m. s. h. m. s. Correction for chronometer at 13 36 . . —51.66 13 34 58 46 Correction for chronometer at 13 46 . . -51.66 . . 13 45 28.11 10 29.65 h. in. it A N. S. limbs mfcr. in rev. 1.635 = 31.86 A () at 13 31 . . 0 02 Vitriiitiun of declination in 10m. Ms. . . + l.OH A pat 13 11 . . . , o..oo Corr. for diam. of niicr, wires . . . . - 2.90 Observed N. S. diumeu-r INFERIOR CONJUNCTION OF VENUS; 1852. MAY 30, 1858. Chronometer time of transit. Micr. Planet— Star. Thermometers. 1 Object. A. B. C. D. E. A a. Hi. Air. Wet. o 2 8. s. s. 8. s. h. m. s. Rev. m. s. Rev. Inches. • e 1 Bessel . . . 339 40.5 53.0 . 10 50 53.19 —3.26 27.916 56.3 50.3 2 Venus . . . N.P. 42.1 55.0 8.0 21.0 34.0 10 52 8.02 +6.641 +1 14.83 +9.90J Ther. att. 3 Bessel ... 339 48.0 0.5 13.5 26.5 . . 10 57 13.57 — 4.13* 60° .2 4 Venus . . . S.P. 3.5 16.5 29.5 42.0 55.5 10 58 29.40 +6.85 1 15.83 10.98J Bar. red. to 32° F. 27.833 5 Bessel . . . 339 44.8 58.0 10.6 23.6 11 1 10.70 —4.48 6 Venus . . . N.P. 1.5 14.5 40.2 53.5 11 2 27.42 +5.70J 1 16.72 10.18} 7 Bessel ... 339 . . 6.8 . . 11 6 6.78 — 5.06i 8 24.1 11 7 24.08 +6.84 1 17.30 11 .901 9 Besse] . . . 339 56.3 11 9 56.28 —5.55 10 Venus . . . N.P. 14.0 • • 11 11 13.98 +4.90 1 17.70 10.45 11 Bessel ... 339 34.0 . 11 13 33.98 —5.95 12 Venus . . . S.P. • • 52.2 • • 11 14 52.18 +6.29 1 18.20 12.24 13 Bessel . . . 339 . . 0.8 11 17 0.78 -8.29 14 Venus . . . N.P. • • • • 19.5 11 18 19.48 +4.37 1 18.70 10.66 15 Besscl ... 339 . , 6.5 , f , . 11 21 6.48 —6.61 16 Venus . . . S.P. • • 25.5 • • 11 2225.48 +5.75 1 19.00 12.36 17 Bessel ... 339 41.7 . , 11 24 41.68 — 7.01J 18 Venus . . . N.P. 1 5 11 26 1.48 +3.84J 1 19.80 10.86 19 Bessel ... 339 55.8 11 27 55.78 — 7.16J 20 Venus . . . S.P. • • 15.7 ' ' • • 11 29 15.68 +5.39i +1 19.90 +12.56 Remarks. There never was a sharp image. The star docs not agree well with the Ephemeris ; but there is no other anything like so bright, and this certainly is not more than an 8th magnitude. Mean N. P. . . . Five transits . Mean S. P. . . . Five transits . b. m. Correction (or chronometer at 11 10 Correction for chronometer at 11 14 A N. S. limbs jiiicr. in rev. . Variation of declination in 4m. 27*. Corr. for diam. of micr. wires Observed N. S. diameter . . . 36° Results. h. m. s. m. s. Rev. / // 11 10 3.08 + 1 17.55 .... +10.412 . . . . =322.93 11 14 29.36 + 1 18.05 .... +13.010 . . . . =354.07 s. b. m. s. . —45.34 Santiago sid. time N. L , . 11 9 16.74 45 . 34 11 13 44.02 4 27.28 ii h. m. .598 = 31 .14 . . . . 0.46 2.17 , . . . 0.58 — 2.20 26.77 282 INFERIOR CONJUNCTION OF VENUS, 1852, JUNE 1, 1853. Cloudy. JUNE H, 1859. a 0 Chronometer time of transit. Planet— Star. Thermometers. Mean of wires Micr. Ear. 1 Object. A. B. C. D. E. An Air. Wet. J s. 8. e. s. s. h. m. B. Rev. m. s. Rev. Inches. 0 o K 1 H.C. . . . 15548 17.5 30.5 43.1 56.4 9.4 10 33 43.38 — 3.611 23.085 51.2 49.2 2 Venus ... N.P. 55.3 9.2 23.2 35.0 47.6 10 40 21.86 + 9. iii +1 38.48. +12.73 Ther. an. 3 H.C. . . . 15518 34.5 47.5 0.5 13.3 26.3 10 43 0.42 — 4.10 61.7 4 Venus . . . S.P. 14.2 27.2 40.0 53.0 6.0 10 44 40.08 +11.09 1 39.6i 15.19 Bar. red. to 32° F. 27.997 5 H.C. . . . 15548 28.0 ' 41.0 53.8 6.7 19.8 10 46 53.86 — 3.971 6 Venus . . . N.P. 7.6 20.5 33.5 46.5 59.4 10 48 33.50 + 9.03 1 39.64 13.00} 7 H.C. . . . 15548 54.2 7.5 20.3 32.6 46.0 10 51 20.12 — 4.471 8 Venus . . . S.P. 35.0 4S.O 1.0 19.5 26.5 10 53 0.80 + 10.41 1 40.68 14.88} % 9 H. C. . . . 15548 8.3 21.2 34.0 46.3 59.5 10 55 33.86 —5.121 10 Venus . . . N.P. 49.0 1.5 14.6 37.4 40.5 10 57 14.60 +8.16 1 40.74 13.28} 11 H. C. . . . 15548 19.2 32.3 45.0 58.0 10.8 10 59 45.08 —5.531 12 Venus ... .P. 59.8 13.5 36.5 39.5 52.5 11 1 26.36 +9.56 1 41.30 15.09} 13 H. C. . . . 15548 4.5 17.6 30.5 43.5 56.5 11 4 30.52 —6.071 14 Venus . . .N.P. 46.5 59.6 12.5 25.3 38.3 11 6 12.42 +7.42 1 41. SO 13.49} 15 H. C. . . . 15548 54.0 7.0 19.8 32.5 45.7 11 9 19.80 —6.62 16 Venus . . . S.P. 36.4 48.8 • • 14.8 28.0 11 11 2.00 +8.831 1 42.20 15.451 17 H.C. . . . 15548 8.8 21.8 34.8 47.6 0.5 11 13 34.70 —6.91 18 Venus . . . N.P. 51.5 4.5 17.5 30.5 43.5 11 15 17.50 +6.86 1 42.80 13.77 19 H.C. . . . 15548 49.3 2.4 15.2 27.6 40.8 11 18 15.06 —7.38 20 Venus . . . S.P. 32.8 45.5 58.5 11.5 24.5 11 19 58.56 +8.201 1 43.50 15.58} 31 H. C. . . . 15548 16.5 29.6 42.5 55.5 8.5 11 2a 42.52 —7.901 S3 Venus . . . N.P. 1.3 13.5 26.7 39.8 53.0 11 24 26.86 +6.14} 1 44.34 14.05 33 H. C. . . . 15548 46.8 59.6 12.5 25.6 38.7 11 27 12.64 —8.291 34 Venus . . . S.P. 31.5 44.5 57.5 10.4 23.5 11 28 57.48 +7.48 1 44.84 15.77} 35 H. C. . . . 15548 1.5 14.6 27.6 40.5 53.5 11 31 27.54 —8.80 38 Venus . . . N.P. 47.5 0.5 13.5 26.5 39.4 11 33 13.48 +5.45 1 45.94 14.25 37 H. C. . . . 15548 31.0 44.0 57.0 9.8 22.8 11 35 56.93 —8.92 38 Venus . . . S.P. 17.0 30.2 43.3 56.0 9.0 11 37 43.10 +7.08 +1 46.18 +16.00 Remarks. There never was a sharp image (luring the observations. Both objects are bright enough, but arc to unsteady that they appear blurred. Results. Mean N. P. . . Seven transits . Mean S. P. . . Seven transits . h. m. g. . . 11 6 28.60 . . 11 10 58.34 m. s. Rev. + 1 41.98 .... +13.512 . . + 1 42.62 . . . . + 15.426 . . / // . . =423.35 . . =5 0.65 h. m. Correction for chronometer at 11 6 Correction for chronometer at 11 11 A N. S. limbs micr. in rev. . . s. . . . —47.48 . . . —47.48 // 1.914 = 37.30 . . — 2.26 h. m. a. Santiago sid. time S. L. ... 11 10 10 86 h. m. A p at 11 5 // Variation of declination in 4m. 30». A pat 11 9 . . 0.61 mm. ot micr. wires .... _ a. SO Observed N. 8. diameter 33.34 AT SANTIAGO DE CHILK. 283 JUNE 3, 1852. t Chronometer time of faii^it. Planet— Star. Thermometers No. for refcren Object. Mean of wires. Micr. Bar. A. B. C. D. E. A a. 44 Air. Wet. 8. 6. 8. 8. 8. h. m. a. Rev. m. P. Rev. Inches. • • 1 2 50.0 10 56 49.98 10 59 25.50 +8.30 —1.49 +2 35.52 —9.79 27.979 55.2 51.4 Venus . . . N.P. 59.5 13.5 25.5 US. 5 51.5 3 4 5 15.0 11 3 14.98 11 550.70 11 16 1.43 +7.80 —0.10 +6.39 2 35.72 7.90 Tber. mt. 62« 6 liar. ml. to 32° P. 27.888 Venus . . . S.P. Anon 24.5 38.0 48.5 51.0 1.5 14.3 16.5 6 Venus . . . N.P. 13.5 26.1 39.0 53.2 5.1 11 18 39.18 —2.79 2 37.75 9.18 7 Anon ..... 0.5 26.3 11 23 13.41 +5.7U 8 Venus . . . S.P. 26.0 • • 51.5 4.8 18.0 11 25 51.87 —1.65 +2 38.46 -736i Remarks. There is no star in the designated place of the Ephemeris, and this, the nearest, is probably of the 9th or 9£ magnitude. Sharp images. Stopped by increasing haze. Results. h. m. B. m. s. Rev. i ii Mean N.P. . . Two transits » • . 11 9 2.34 + 2 36.63 . . 9 485 . Mean S. P. . . Two transits . . . 11 IS 51.28 + 2 37.09 .... —7.632 . ... =2 28.75 li. m. s. h. m. s. Correction for chronometer at 11 9 . . . —47.90 Santiago sid. time N. L . . 11 8 14.44 Correction for chronometer at 1 1 16 . . . —47.90 . . 6 48 94 // H. m. n A N. S. limbs micr. in rev . 1.853 = 3f>. 11 A pat 11 7 . . . . 0 35 Variation of declination in 6m. 49s. , — 3.55 A p at 11 14 Curr. for diain. of micr. wires . . — 2.20 Observed N. S. diameter .... 30.36 JUNE 41—11, 180a. Cloudy. JUNE 12, 1852. i Chronometer time of transit. Planet— Star. Thermometers. 1 Object. A. B. C. D. E. A a. AS. Air. Wet. s ' I c pB 8. s. B. s. 8. h. m. 8. Rev. m. B. Rev. Inches. • « i Venus . . . N.P. 47.0 0.0 12.5 25.3 38.0 11 25 12.58 —7.08 28.037 48.0 46.6 2 H. C. . . 16659 15.8 28.5 41.0 54.0 11 98 28.50 +0.72 —3 15.94 —7.80 Ther. an. 3 Venus . . . S.P. 0 3 12 9 25 6 38 5 4 H. C. . . . 16659 2.8 15.5 41.2 54.0 11 34 28.37 +1.42 3 15.37 9.99 Bar. red. to 32" F. 27.951 5 Venus . . .N.P. 56.5 9.0 23.0 34.8 47.6 11 36 21.98 -6.10J 60 H. C. . . . 16659 11.5 24.3 37.0 49.6 2.5 11 39 36.98 +2.12 3 15.00 8.221 7 Venus . . . S.P. 13.5 26.5 39.2 52.0 4.6 11 41 39.10 -7.61 8 H. C. . . . 16659 28.0 41.0 53.6 6.5 19.5 11 44 53. 7J +2.70 3 14.56 10.31 9 Venus . . . N.P. 27.0 39.8 52.7 5.0 18.3 11 46 52.56 —5.07 10 II. C. . . . 16659 41.5 54.0 19.6 . 11 50 6.80 +3.09J ! —3 14.34 — 8.16J 1 ! 284 INFERIOR CONJUNCTION OF VENUS, 1852, JUNE 12, 1853— Continued. fa jj 1 1 Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A (5. Air. Wet. 8. s. s. 8. s. h. in. 3. Rev. m. s. Rev. Inches. • 0 n 126 13 14 15 Venus . . . S.P. H. C. . . . 16659 Venus . . . N.P. H. C. . . . 16659 Venus . . .S.P. 5.0 36.0 48.5 35.0 17.8 31.5 48.5 48.0 30.5 43.2. 56.0 11 52 30.50 11 55 44.15 12 1 1.36 18 4 14.09 12 7 0.72 —6.80 +3.95 — 4.00J +4.90 — 5.60J —3 13.65 3 12.73 —10.75 8.90J 28.037 Ther. att. 60°. 9 Bar. red. to 32° F. 27.951 48.0 46.6 1.5 14.0 0.8 14.0 20.8 13.5 26.8 39.7 26.3 16 H. C. . . . 16659 • • 0.5 26.2 12 10 13.36 +5.50J —3 12.64 —11.11 Remarks. Planet sharp and steady; hut there is so much haze that the star is extremely dim. a Perhaps a little open. Recorded 42.5s. at wire E. 6 Too dim. Results. Mean N. P. Mean S. P. Four transits . Four transits . h. m. Correction for chronometer at 11 42 Correction for chronometer at 11 48 h. m. s. 11 42 22.11 11 48 5.84 s. . —49.08 . —49.08 m. s. — 3 14.48 — 3 14.05 Eev. — 8.274 — 10.540 A N. S. limbs micr. in rev. . . . Variation of declination in 5m. 44s. Corr. for diam. of micr. wirea . . Observed N. S. diameter . . , 2.266 = 44.16 — 3.32 — 2.20 38.64 . . =241.26 . . =325.42 h. m. s. Santiago sid. time N. L 114133.03 Santiago sid. time S. L 114716.76 Interval 5 43.73 h. m. s. A pat 11 43 . . 0,31 A p at 11 49 . 0.42 JUNE 13, 1853. Cloudy. JUNK II, 1852. Cloudy. JUNE: 13, issa. i a Chronometer time of transit. Planet— Star. Thermometers. £ Mean of wires. Micr. Bar. £ <£ Object. A. B. C. D. E. A a. A S. Air. Wet. i 6. s. 8. 8. B. h. m. s. Rev. m. B. Rev. Inches. • • i Venus . . . N.P. 49.8 2.5 15.5 28.0 41.0 11 32 15.36 —5.21 28.109 44.8 43.3 2 B.C. . . . 17013 57.5 10.5 23.1 35.5 11 39 10.33 4.68 —6 54.97 —0.53 3 Venus . . . S.P. 29.5 48.0 55.0 7.5 20.4 11 41 54.88 4.07 Ther. att. 57°. 1 4 B.C. . . . 17013 24.0 36.5 49.0 1.6 14.5 11 48 49.12 5.81 6 54.24 +1.74 Bar. red. to 32° F. 5 Venus . . . N.P. 25.0 37.5 50.5 3.0 15.9 11 50 50.38 7.12 28.035 6 H. C. . . . 17013 19.8 44.6 56.5 9.5 11 57 44.45 7.10J 6 54.07 — O.OIj 7a Venus . . . S.P. 26.6 39.5 53.9 4.9 17.8 12 0 52.20 4.88 8 H.C. . . . 17013 19.5 45.4 57.7 10.5 12 7 45.12 7.29 6 52.92 +2.41 9 Venus . . . N.P. 24.6 37.3 50.5 3.0 15.5 12 950.18 8.65 10 11. C. .' . . 17013 17.5 29.5 42.5 55.5 8.0 12 16 42.60 9.25J 6 52.42 0.60} 11 Venus . . . S.P. 57.0 10.0 23.7 35.5 47.5 12 19 22.54 7.16 12 H.C. . . . 17013 49.0 14.5 27.0 39.5 12 26 14.35 —10.21 —6 51.81 +3.05 AT SANTIAGO DE CHILE. .MM; 15. 1853— Continued. Remarks. Images quite sharp, and both objects steady during the first four observations. a Micrometer recorded — 5.88 rev. 285 Results. Mean N. P. Mean S. P. Three transits Three transits h. in. Correction tor chronometer at 11 51 Correction for chronometer at 19 1 A N. S. limbs micr. in rev. . . . Variation of declination in 9m. 45s. Corr. for diam. of micr. wires . Observed N. S. diameter . . . h. m. s. 11 50 58.64 12 0 43.21 — 46 12 — 46.12 li 1.380 = 46.39 — 5.70 — 2.20 38.49 -6 53.82 -6 52.99 Rev. + 0.020 + 2.400 = 0 0.39 = 0 46.78 h. m. a. Santiago sid. time N. L 115012.52 Santiago sid. time S. L 11 59 57.09 Interval 9 44.57 h. m. " A pat 11 54 0.00 A pat 12 3 0.10 JUIVE 16— 33, 1853. Cloudy. JUNE JS3, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ad. Air. Wet. s. i. 8. 8. , h. m. s. Rev. s. Rev. Inches. • • 1 Bessel ... 274 34.5 59.5 t f 12 3 47.02 —9.57} 28.065 52.8 49.3 2 Venus . . . N.P. 30.0 42.5 55.0 12 4 42.50 3.92} +55.48 +5.65 3 4 5 6 Bessel ... 274 Venus . . . S.P. Bessel ... 274 Venus . . . N.P. 44.6 53.5 • • 14.0 10.0 23.0 18.5 34.6 44.0 12 7 13.98 12 8 9.72 12 10 22.98 12 11 18.66 10.03 1.98} 10.41} 4.71} 55.74 55.08 8.04} 5.70 Ther. att. 60M Bar. red. to 32° F. 27.982 7 Bessel ... 274 28.0 . 12 14 27.98 10.90 8 Venus . . . S.P. 59.5 • • 24.5 49.5 12 15 24.49 2.65 56.51 8.35 9 Bessel ... 274 27.4 12 18 27.38 11.37} 10 a Venus . . . N.P. 24.0 • • • • 12 19 23.98 5.46 56.60 5.91} 11 Bessel ... 274 . , . . 54.2 . , . . 12 21 54.18 11.80 12 Venus . . . S.P. • • • • 49.5 15.5 12 22 50.03 3.33 55.85 8.47 13 Bessel . . . 274 16.0 12 27 15.98 12.32 14 Venus . . . N.P. 47.0 • • • • 12.5 37.8 12 28 12.42 6.07 56.44 6.25 15 Bessel ... 274 . 8.5 t t 12 31 8.48 12.73} 16 Venus . . . S.P. 40.5 • • 5.8 31.0 12 32 5.76 4.20} 57.28 8.52 17 Bessel ... 274 . . 57.0 12 36 56.98 13.25 18 Venus . . . N.P. 28.3 53.5 18.5 12 37 53.42 6.79 56.44 6.46 19 Bessel ... 274 32.5 . 12 40 22.48 13.54} 20 Venus . . . S.P. 53.2 19.0 44.0 12 41 18.73 —4.68 +56.24 +8.86} 286 INFERIOR CONJUNCTION OF VENUS, 1852, JC1VE 33, 1853— Continued. Remarks. At the commencement images very sharp ; yet there ha, been a vibratory motion .11 the time, which prevented any of the measures from being made with satisfaction. a Recoided 43.2s. at wire E. Results. h. in. s. s. Rev. / u Mean N. P.. . . Five transits . . , 12 20 18.20 + 56.13 .... +5.995 . . . . =156.84 MeanS. P. . . . Five transits . . . 12 23 57.74 + 56.32 .... +8.430 . . . . =2 44.30 h. m. m. s. b. m. 9. Correction for chronometer at 12 20 . —1 5.97 12 19 12.23 Correction for chronometer at 12 24 . -1 5.97 12 22 51.77 3 39.54 // h. m. A N. S. limbs micr. in rev 2.435 = 47.46 .... 0.24 Variation of declination iu 3m. 40s. . . — 2.10 . . . 0.36 Corr. for diam. of micr. wires . . . . — 2.20 Observed N. S. diameter 43.16 JINE 33, 1853. V Chronometer time of transit. Planet — Star. 'hermorneters. B B klean of wires. Micr. Bar. | Object. A. B. C. D. E. A a. At. Air. Wet. & d s. s. B. s. s. h. m. s. Rev. m. s. Eev. Inches. • • te i Bessel ... 274 15.5 S8.0 12 5 15.53 —6.82 27.937 54.2 47.3 2 Venus . . . N.P. 43.1 55.5 8.5 21.0 33.7 12 7 8.36 4.57 + 1 52.83 +2.25 Ther. att. 3 4 Bessel , . . 274 Venus . . . S.P. 53.3 6.0 25.4 18.5 37.5 31.0 49.8 43.5 12 9 25.13 12 11 18.46 7. 77J 2.83i 1 53.33 4.94 58°. 6 Bar. red. to 32° F. 27.858 5a Bessel ... 274 51.5 3.7 16.0 28.5 41.3 12 14 16.20 8.39 6 Venus . . . N.P. 44.3 57.0 9.5 22.1 34.5 12 16 9.48 5.75 1 53.28 2.64 7 Bessel ... 274 21.2 33.6 58.8 11.5 12 19 46.28 9.27 8 Venus . . . S.P. 14.5 27.5 40.0 4.8 12 21 39.80 3.91 1 53.52 5.36 9 Bessel ... 274 21.0 46.0 . . 11.0 12 24 45.99 11.81 10 Venus . . . N.P. 14.5 • • 39.5 4.7 12 26 39.56 8.76 1 53.57 3.05 11 Bessel ... 274 58.2 23.5 48.5 12 29 23.39 7.86 12 Venus . . . S.P. 52.0 17.1 42.3 12 31 17.12 2.00 1 53.73 5.86 13 Bessel ... 274 19.0 44.0 9.0 12 33 43.99 8.01J 14 Venus . . . N.P. 12.5 • • 38.0 3.0 12 35 37.82 4.63£ 1 53.83 3.38 15 Bessel ... 274 10.5 23.2 48.2 12 38 23.15 8.34 16 Venus . . . S.P. 52.0 4.5 17.1 42.3 12 40 17.08 2.51 1 53.93 5.83 1 17 Bessel ... 274 . 56.8 9.0 22.0 34.5 12 43 9.35 8.73 18 Venus . . . N.P. 38.5 50.8 3.5 28.8 12 45 3.50 5.16 1 54.15 3.57 19 Bessel ... 274 . 51.5 16.3 12 49 51.45 8.32J 20 Venus . . . S.P. 20.5 • • 45.5 57.5 10.5 12 51 45.40 2.07 1 53.95 6.25J 21 Bessel ... 274 0.0 25.1 49.8 12 54 24.96 8.40i 32 Venus . . . N P 54.2 19.5 • • 44.7 12 56 19.46 4.58J- 1 54.50 3.82 23 Bessel ... 274 2.6 15.5 40.0 12 59 15.22 8.43J 24 Venus . . . S.P. 44.3 9.5 35.0 13 1 9.59 — 2.03* +1 54.37 +6.39 AT SANTIAGO DE CHILE. 287 .MM: 23, 1853— Continued. Remarks. Sharp, clean Images throughout ; and, if the star would have permitted a little more light, I should have put down all the measure! •atisfaciory. a Star recorded 15.5s. at wire C. Results. h. m. s. m. 8. Rev. / / Mean N. P. . . SU transits . . . . 12 31 9.70 + 1 53.69 .... +3.10-3 . . . . =1 0.46 Mean S. P. . . Six transits . . . . 12 36 14.58 + 1 53.80 .... +5.772 . . . . = 1 52.50 h. m. m. i. h. m. e. f"n pofinn fn rhrrinnmpter at 1^ 31 . . —1 6.11 12 30 3 59 " ' . 1 6.11 12 35 8 47 5 4.68 // h. m. H A "V S 1' h ' ' rpv 2.670 = 52.04 . . . 0 14 . . a. 85 A f at 12 34 . . . 0.29 Corr. for diam. of micr. wires . — 2.20 Observed N. S. diameter ... 46.99 JUNE 34, 1858. g Chronometer time of transit. Planet— Star. Thermometers. S Mean of Micr. Bar 1 £ Object. A. B. C. D. E. A a. A A Air. Wet. Jl •i s. s. s. s. 8. h. m. s. Kev. m. s. Rev. Inches. „ 0 X 1 Venus . . . N.P. 43.0 . 8.2 f 33.5 12 16 8.22 +6.03 28.004 53.5 49.2 3 Bessel ... 274 37.0 2.2 12 20 37.15 —5.51 —4 28.93 + 11.54 Ther. att. 3 Venus . . . S.P. 57.0 23.0 48.5 12 23 22.82 +7.43 59°.7 4 a Bessel ... 274 . , 51.5 17.0 12 27 51.80 —6.53 4 28.98 13.96 Bar. red. to32°F. 27.921 5 Venus . . . N.P. 10.0 . . 35.3 . . 0.5 12 30 35.26 +4.38 6 Bessel ... 274 38.5 ' ' 3.6 • • 29.0 12 35 3.69 —7.42 4 28.43 11.80 7 Venus . . . S.P. 59.7 t t 25.0 50.3 12 37 24.99 +6.33J 8 Bessel . . . 274 28.0 • • 53.6 • • 18.5 12 41 53.36 —8.00 4 28.37 14.33i 9 Venus . . . N.P. . t 50.0 15.0 12 43 50.05 +3.64 10 Bessel ... 274 • • 18.5 43.5 12 48 18.55 —8.52 428.50 12.16 11 Venus . . . S.P. 19.0 44.5 9.5 12 50 44.32 +5.69i 12 Bessel ... 274 47.5 12.5 37.5 12 55 12.47 —9.01 —4 28.15 +14.70J Remarks. Images good and steady, but the star is too small for satisfactory work ; the declination measures, however, are regarded good. a Recorded 53.5s. at wire C. Results. Mean N. P. . . Three transits . Mean S. P. . . Three transits . . h. m. s. , . 123011.18 . 12 37 10.71 m. s. Rev -428.62 .... +11.833 . — 428.50 .... +14.333 . . . . =350.62 . =439.34 h. m. Correction for chronometer at 12 30 . Correction for chronometer at 12 37 . m. a. . . — 1 6.90 . . — 1 6.90 Santiago Bid. time N. L Santiago sid. time S. L h. m. 9. . 13 29 4.28 . 12 36 3.81 6 59.53 • h. m. . . . 0.55 . . . 0.78 Corr. for diam. of micr. wires . . — 2.20 42.65 288 INFERIOR CONJUNCTION OF VENUS, 1852, JUNE 35, 36, Ht, 1853. Cloudy. JU1YE 38, 1853. Cloudy. There was quite a sharp earthquake between 1 and 2 A. M. JUSTE 39 to JULY 4, 1S53. . Cloudy. JULY 5, 1853. There was a severe earthquake from "h. 37m, 17s. to 7/t. 37m. 52s. sid. time. The night was cloudy. JULY O, 1853. i 1 »« <2 d 1 Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A*. Air. Wet. s. s. s. s. s. h. in. s. Rev. s. Rev. Inches. • • Bessel ... 273 . 37.5 49.5 14.3 12 56 49.68 —2.96 28.094 47.4 43.7 2 Venus . . . N.P. . . 47.5 59.8 12.0 12 59 59.77 +2.09J +3 10.09 +5.051 3 4 5 6 Bessel . . . 273 Venus . . . N.P. Bessel . . . 373 Venus . . . N.P. 4.5 56.5 16.8 58.7 19.5 29.3 11.6 21.1 31.6 41.5 24.0 33.9 44.0 54.1 46.3 13 2 19.48 13 5 29.24 13 8 11.43 13 11 21.38 —2.92J +2.29 — 2.57J +2.83 3 9.81 3 9.95 5.21J 5.40£ Thcr. att. 58°. 0 Bar. red. to 32° F. 23.017 7 Bessel ... 273 . 51.7 4.3 16.3 13 14 4.10 —1.75 8 Venus . . . N.P. 48.5 1.0 13.2 25.7 38.1 13 17 13.30 +3.69J +3 9.20 +5.441 Remarks. Very sharp and steady until the last observation. Results. h. m. s. Mean N.P. . . Four transits ... 13 830.92 1i- nt, m. g. Correction for chronometer at 13 8 . . — 1 7.21 m. B. Rev. + 3 9.76 .... +5.280 . . Santiago sid. time N.P . ; u . =1 42.91 h. m. s. . . 13 7 23.71 h. m. " A pat 13 6 0.53 JULY 1, 1853. At night the comparing star wa» not perceptible through the thin cirri unlil 13A. sid. time, at which time the planet had become too much blurred for measures. JULY H, Atmosphere this evening far worse than last night. AT SANTIAGO DE CHILE. 289 JULY 9, 1853. No. for reference. Object. Chronometer time of transit. Meanol 'win-'. Micr. Planet — Star. Bar. Thcriuonn'11'is. A. B. C. D. B. A'a. A i. Air. Wet. 8. s. |i s. s. ti. in. s. Rev. s. Bev. Inches. • 4 1 llesscl . . . 27.1 .-.:)..-> 0.2 18.5 30.8 12 58 18.37 —1.45 27.972 51.0 45.3 2 3 4 5 Venus . . . N.P. Bessel . . . 273 Venus . . . N. . Bessel ... 27 48.5 10.5 4.0 3.6 11.0 22.6 16.7 15.7 13.5 35.2 28.9 28.0 25.5 47.7 41.0 38.5 12 59 16.53 13 1 15.77 13 2 13.40 13 4 35.12 —0.06 +3.0-2J 4.45 3.03} .+58.16 57.63 +1.39 1.421 Ther. alt. 58°. 1 Bar. red. to32°F. 27.895 6 Venus . . . N.P. 20.3 32.5 44.6 13 5 32.47 4.61 57.35 1.57J 7 Bessol ... 273 38.2 50.9 3.0 15.3 , 13 7 2.97 3.30 8 Venus . . . N.P. 35.3 48.0 '0.0 12.7 25.2 13 8 0.24 4. .90 57.27 1.60 9 Bessel ... 273 13.5 28.0 38.4 50.5 13 9 38.22 3.45 10 \rlilis . . . N.P. 10.3 23.7 3B.i 47.5 0.0 13 10 35.14 5.02 56.92 1.57 11 l;;'->rl . . . 273 50.5 3.0 16.0 28.3 . 13 12 15.57 3.76 12 Venus . . . N.P. 48.0 0.5 13.0 25.2 38.0 13 13 12.94 5.49 57.37 1.73 13 1 ... 273 25.8 38.0 50.6 t 13 15 38.13 4.58 14 Venus . . . N.P. 22.5 35.0 47.5 13 16 35.00 6.3-3 56.87 1.74 15 : . . .273 9.8 22.5 35.3 13 18 22.50 5.22J 16 Venus . . . N.P. 6.3 18.5 31.5 • • 13 19 18.77 6.98 56.27 1.75* 17 Hesse! . . . 27:! 34.0 46.5 69.0 . r 13 21 46.50 6.32 18 Venus . . . N.P. 29.8 42.5 58.0 13 22 42.43 8.10i 55.93 1.784 19 Besscl ... 273 26.5 39.0 51.5 . 13 24 39.00 7.60 SOo Venus . . . N.P. 22.3 35.0 47.4 • • 13 25 34.90 +9.43i +55.90 +1.83J Remarks. The first six observations were made by daylight, and are tolerably fair, though I cannot say that either object was ever sharp or steady. o Not to be depended upon. Results. h. m. s. Mean N. P. . . Ten transits . . . 131218.18 h. m. m. i. Correction for chronometer at 13 12 . . . — 1 5.67 h. m. A pat 13 11 . . s. Rev. + 56.97 .... +1.640 Santiago Bid. time N. P. if . 0.27 . =031.96 h. m. s. 13 11 12.5! JULY 10, 1858. It was not possible to see the comparison star through (lie cirri. Diameter of Venus from a mean of 6 measures, at 12A. 54m. sicl. time, 2.962 rev. Corrected diameter, ;">' . ">lt. JULY 11 nnd 12, 1853. Cloudy. JULY 13, 1853. Venus visible, but so blurred and unsteady as to render observations impossible. Cloudy until the 18th ol July. 37° 290 INFERIOR CONJUNCTION OF VENUS, 1852, JCl/V 18, 1858. Clouds prevented observations until Ilic Q6th of July, except when the planet was too near the sun. JULY 37, 1853. Th« comparing star was not visible in the morning twilight. jri,Y 38 and 39, 1883. Cloudy. JULY 30, 1853. aj G Chronometer time of transit. Planet— Star. Thermometers. Micr 1 Object. A. B. C. D. E. A a. AJ. Air. Wet. & 0 8. s. s. s. s. h. m. s. Eev. s. ! Rev. Inches. 0 O 1 H. C. . . . 14961 . 3.0 . 2 50 2.98 +4.89 28.036 37.5 36.8 2 Venus . . . S.F. 55.0 2 50 54.98 — 4.31i +52.00 — 9.20± Ther. att. 3 H. C. . . . 14961 31.3 . . 2 52 34.28 +4.89 54°. 5 4 27.5 2 53 27.48 —7.57 53.20 12.46 to 32° F. 27.870 5 H. C. . . . 14561 . . 23.5 . . 2 55 23.48 +4.811 6 Venus . . . S.F. 16.0 2 56 15.98 —4.60 53.50 9.441 7 H. 0. ... 14961 . 13.6 . , 2 58 13.58 +4.82i 8 Venus . . . N.F. 6 0 2 59 5.98 —7.81 52.40 12.63J 9 H. C. . . . 14961 52.6 3 0 52.58 +4.08 10 Venus . . . N.F. 45.5 3 1 45.48 —7.86 +52.90 12.54 11 H. C. . . . 14961 +4.771 12 a Venus . . .S.F. 44.5 • • • • 3 4 44.48 —4.81 • • • — 9.581 Remarks. A dripping morning; even the object-glass, although under cover, suffused with moisture before it had been exposed ten minutes. Thus the nages were never sharp ; and, indeed, the star was at least 3" in diameter all the time, though the planet was tolerably favorable for measures. a This observation omitted in the results. Results. Mean S. F. Mean N. F. Two transits Three transits h. m. Correction for chronometer at 2 53 . Correction for chronometer at 2 58 . A N. S. limbs micr. in rev. . . . Variation of declination in 4m. 31s. . Corr. for diam. of micr. wires « . Observed N. S. diameter . h. m. s. 2 53 35.48 2 58 6.31 + 23.41 + 23.42 3.220 = 62.76 — 0.25 — 2.20 60.31 + 52.25 + 52.63 Rev. — 9.325 — 12.545 = 3 1.74 = 4 4.50 h. m. s. Santiago sid. time S. F 2 53 58.90 Santiago sid. time N. F 25829.73 Interval 4 30.83 h. m. ' A pat 2 53 , 0.88 A f at 2 58 . 1 .03 AT SANTIAGO DE CHILR. 291 JULY 31, 1853. a> c V 1 d 1 Object. Chronometer time of transit. Mean of \v r Micr. Planet — Star. Bar. Thermometers A. B. C. D. E. A a. Ad. Air. Wet. s. s. s. s. s. h. m. s. Rev. in. s. Rev. Inches. • • II. 0. . . . 14*61 10.5 23.5 35.0 46.5 59.0 2 48 34.90 —1.54 28.000 36.0 35.4 2 3 4 5 Venus . . . N.F. H.C. . . . 14961 Venus . . . S.F. H.C. ... 14861 29.5 39.2 0.5 20.5 52.0 12.7 33.0 54.5 4.6 25.5 45.0 7.0 17.5 38.0 57.5 20.2 29.4 50.3 9.5 2 51 54.76 2 54 4.5-1 2 57 25.40 2 59 45 10 +2.92 —1.75 +5.74 -1.731 +3 19.86 320.86 +4.46 7.49 Ther. att. 55°. 5 liar rrd. to 33° F. 27.930 6 Venus . . . N.F. 40.2 52.2 4.5 17.0 29.0 3 3 4.58 +2.76i 3 19.48 4.50 7 H.C. . . . 14661 38.3 50.6 2.5 15.0 27.5 3 5 2.78 — 1.56J 8 Venus . . . S.F. 57.5 10.0 22.5 34.7 46.8 3 8 22.30 +5.93 +3 19.52 +7-49J Remarks. Morning similar to that of yesterday. The planet twinkling to the eye; and after the second observation its crescent was plainly visible without the telescope. During the first two observations neither object was sharp or steady. Diameter of Venus from a mean of 5 measures at 3ft. 17m. sid. time, 3.003 rev. Corrected diameter, 56".53. Results, Mean N. F. Mean S. F. Two transits Two transits h. in. Correction for chronometer at 2 57 . Correction for chronometer at 3 3 . A N. S. limbs micr. in rev. Variation of declination in 5m. 24s. . Corr. for diam. of micr. wires . Observed N. S. diameter . . . h. m. s. 2 57 29.67 3 2 53.85 8. . +26.61 . +26.61 3.012 = 58.70 + 0.39 — 2.20 56.89 m. *. Rev. ' " + 319.67 .... +4.480 .... =127.33 + 320.19 .... +7.492 .... =226.02 h. m. s. Santiago sid. time N. F 25758.28 Santiago sid. lime S. F 33 20.46 Interval 524.18 h. m. ' A pat 2 56 0.38 A pat 3 8 0.51 AUGUST 1, ft, and 3, Cloudy. AUGUST 4, 1853. Chronometer time of transit. Planet— Star. Thermometers. g Mean of wires.! Micr. Bar. & £ Object. A. B. C. D. E. A a. A {. Air. Wet. S a 8. - s. 8. s. h. m. s. Rev. m. 8. Rev. Inches. • O 1 Venus . . . S.F. 35.5 48.8 1.0 13.5 2 49 48.83 —4.57 28.096 37.5 36.6 2 Bessel . . . 273 15.5 28.0 40.5 53.0 2 53 28.16 7.63 —3 39.30 +3.06 Ther. ntt. 3 Venus . . . N.F. 8.5 21.0 33.8 45.0 57.0 2 55 32.93 7.29 54°. 7 4 Bessel ... 273 46.5 59.5 12.0 24.0 36.5 2 59 11.70 7.73} 3 38.74 0.44J to 33° F. 28.029 5 Venus . . . S.F. 45.5 57.5 10.5 22.5 35.0 3 3 10.20 4.36 6 Bessel ... 273 37.5 49.5 2.0 14.3 3 6 49.73 7.53 3 39.53 3.17 7 Venus . . . S.F. 5.0 17.3 29.3 41.5 53.5 3 8 29.33 4.07} 8a Bessel . . . 273 44.3 56.0 8.5 Sl.O 33.5 3 12 8.60 —7.08 —3 39.34 +3.00} 292 INFERIOR CONJUNCTION OF VENUS, 1852, AUGUST 4, 1852— Continued. Remarks. Venus twinkling to the unassisted eye. Neither object was ever sharp or steady. a Perhaps a little open. Diameter of Venus from a mean of 6 measures, at 3A. 23m. sid. time, 2.917 rev. Corrected diameter, 54" .65. Mean N. F. . . One transit . Mean S. F. . . Three transits h. m. Correction for chronometer at 2 56 Correction for chronometer at 3 0 A N. S. limbs micr. in rev. . . Variation of declination in 4m. 56s. Corr. for diam. of micr. wires Observed N. S. diameter . . . Results. h. m. s. 2 55 32.96 3 0 29.46 s. . +41.10 . +41.10 2.633 = 51.32 + 0.56 — 2.20 49.68 m. s. Rev. ' '' — 338.74 . . +0.445 .... =0 8.67 .— 339.39 .... +3.078 .... =059.99 h. m. s. Santiago sid. time N.F 25614.06 Santiago sid. time S. F 31 10.56 Interval 4 56.50 h. m. " A pat 2 58 0.03 A pat 3 3 0.18 AUGUST 5, 1852. There being an error of 10" in the computation of 14596 H. C., there is no comparing star for this day. The same star was also selected for the 6th of August. AUGUST T, 1853. Cirri prevented any star smaller than a 5th magnitude from being seen to the N. E. during the morning twilight. AUGUST 8, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ai. Air. Wet. B. s. s. s. s. h. m. s. Rnv. in. s. Rev. Inches. • • 1 Venus . . . S.F. 13.0 25.6 37.5 49.5 2.5 2 46 37.62 —10.57 27.937 43.1 40.2 2 3 4 Besscl ... 273 Venus . . . N.F. Bessel ... 273 0.0 56.5 13.5 9.0 28.0 57.0 • • 33.5 50.5 2 53 8.93 2 58 25.54 3 2 56.98 + 6.18 —12.92 + 6.34 —6 31.31 -6 31.44 —16.75 —19.26 Ther. alt. 54°. 1 Bar. red. to 32° F. 27.872 Remarks. Object very badly defined, and the star so dim that no reliance can be placed on Hie measures. Results. h. m. s. m. s. Rev. / // Mean S. F. . . One transit . . . . 2 46 37.62 — 6 31.31 .... — le.^SO . . . . =5 26.46 Mean N. F. . . One transit . . . . 2 56 25.54 — 6 31.44 .... —19.260 . ... =6 15.38 h. m. s. h. m. s. Correction for chronometer at 2 47 . . . . +50.00 . . . 2 47 27 62 Correction for chronometer at 2 56 . . . . + 50.00 . . . 2 57 15.54 . . . 9 47 92 // h. m. it A N. 8. limbs micr. in rev . 2. 510 = 48. 92 A p at 2 51 . . . . 1.36 Variation of declination in 9m. 48s. . — 1.37 1 20 Corr. for diam. of micr. wires — 2.20 Observed N. S. diameter . «S.3S AT SANTIAGO DE CHILE. 293 AUGUST 9, 1833. A dense fog that rose immediately after the planet, prevented any objects from being seen near the horizon. AUGUST 10, 1952. The dense fog covering the city since yesterday morning broke away suddenly at 74. sid. time. August 11 was cloudy. No. for reference. AUGUST 13, 1858. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. An. A2 57.78 . . . . + 9.509 . . . . =3 5.33 Mean N. F. . . Four transits . . . 3 26 43.09 — 2 57.78 .... +12.000 . . . . =3 S3. 88 b. m m. s. h. in. s. Correction for chronometer at 3 20 . . . +1 10.34 3 21 57.55 Correction for chronometer at 3 26 . . . +1 10.35 3 27 53 44 5 55 89 „ h. m. A N. S. limbs micr. in rev . 2.491 = 48.55 A f> at 3 23 . . . . 0.38 Variation of declination in 5m. 56s. . — 0.87 A f at 3 29 . . . . 0.43 Corr. for diam. of micr. wires . — 2.20 Observed N. S. diameter .... 45.48 AUGUST 31, 18Sa. No. for reference. Object. Chronometer time of transit Mean of wires. Micr. Planet — Star. Bar. Thermometers. A. B. C, D. E. A a. A<5. Air. Wet. s. a. a. B. s. 1). m. a. Rev. 8. Rev. Inches. • • 1 2 3 4 5 6 Venus . . . S.F. Bessel ... 273 Venus . . . N.F. Bessel ... 273 Venus . . . S.F. Bessel ... 273 30.3 2 55 30.28 —13.70 2.66 16.19 2.89 13.60 2.651 • • • —11.04 13.30 —10.941 28.155 ThT att. 47°. 1 R;ir. red. to 32° F. 28.110 37.3 • • • • 51.5 • • • • 2 57 51.48 0.0 • • 3 0 59.98 296 INFERIOR CONJUNCTION OF VENDS, 1852, AUGUST 21, 1853— Continued. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A *. Air. Wet. E. s. s. s. s. h. m. s. Rev. s. Rev. Inches. * ° 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 32 S3 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39a 40 41 42 436 44 45 6 46 474 48 49 J 50 511 52 Venus . . . N.F. Bcssel ... 273 27.0 • • 3 4 26.98 —16.02 2.69 13.581 2.55 . . . —13.33 11.03} 13.261 11.161 13.32 11.13J 13.28 11.151 13.34 11.26 13.39 11.37 13.551 11.67J 13.681 11.441 13.62 13.71} 11.461 13.72J- 11.55 —13.80 28.155 Ther. att. 47°. 1 Bar. red. to 32° F. 28.110 35.0 34.6 53.5 3 8 53.48 Bessel ... 273 Venus . . . N.F. Bessel ... 273 36.2 3 11 36.18 15.721 2.46 7.5 3 14 7.48 13.50 2.311 Venus . . . N.F. Bessel ... 273 46.3 59 5 • • 3 16 46.28 3 16 59.48 3 19 10.48 3 19 23.98 3 21 57.48 3 22 10.48 3 25 28.68 3 25 41.78 3 28 17.48 3 28 30.48 3 33 24.58 3 33 37.48 3 35 57.48 3 E6 9.48 3 38 20.38 3 38 32.18 3 41 45.98 3 41 57.98 3 44 15.08 3 44 26.48 3 47 13.98 3 47 24.58 3 50 9.48 3 50 20.48 3 53 25.98 3 53 36.98 3 56 25.48 3 56 35.98 3 59 45.48 15.52 2.20 13.18} 2 05 15.26 1.98 12.851 1.70 14.80 1.46 12.14 i). 18 14.10 0.71 11.89 0.52 13.621 0.07 —11.34 + 0.33} -13.17 + 0.51J —10.64 +0.801 —11.15 + 2.47 — 8.59 + 2.931 —10.48 — 7.78 4. :; R8J —13.20 13.50 13.00 13.10 13.00 12.90 12.00 11.80 12.00 11.40 10.60 11.00 11.00 10.50 10.5 Bessel . . . 273 Venus . . . N.F. Bessel ... 273 . . . . 24.0 57.5 10.5 . . 28.7 Bessel ... 273 Venus . . . N.F. Bessel . . . 273 Venus . . . S.F. Bcssel ... 273 Venus . . . N.F. Bessel ... 273 • • 41.8 17.5 30 5 • • • 21.6 37.5 57.5 9.5 20.4 • • • • Bessel . . . 273 Venus . . . N.F. Bessel ... 273 Venus . . . S.F. • • • • 32.2 46.0 58.0 15.1 Bessel . . 273 Venus . . . N.F. Bessel ... 273 Venus . . . S.F. • • • • 26.5 14.0 24.6 9.5 • • Bessel ... 273 Venus . . . N.F. Bessel ... 273 Venus . . S.F. Bessel ... 273 Venus . . . N.F. Bessel ... 273 Venus . . . S.F. Bessel ... 273 Venus . . . N.F. Bessel . . . 273 Venu<* . . . S.F. BesM-1 ... 273 Venus . . . N.F. • • 20.5 26.0 37.0 25.5 36.0 45.5 • • • • • • 8.0 • • • • 4 2 7.98 24.0 4 4 23.98 — 9.64 4- 4 08i • • 44.3 4 B 44.28 - 7.201 4. 4 ;< p 1 !l 4.58 4 9 14.48 — 9.12 + 4.68 — 9.90 Bessel ... 273 14.5 AT SANTIAGO DE CHILE. AUGUST ai, 1858— Continued. Rtijtarks. Fine clear morniiif. Tolerably sharp images and fair observations throughout. a Daylight. 6 Omitted in the results. Diameter of Venus from a mean of 6 measures, at 4A. 14m. sid. time, 2.349 rev. Corrected diameter 4l".63. 297 Mean of thrert measures for N. F. . Menn of four measures for S. F. . MeanN. F. . . Seven transits . Mean S. F. . . Seven transits . h. in. Correction for chronometer at 3 5 . Correction for chronometer at 3 5 . A N. S. limbs micr, in rev. . , Variation of declination in 15s. . , Corr. for diam. of micr. wires . . , Observed N. S, diameter . . , h. m* Corrt'CtKni for chronometer at 3 35 . Correction for chronometer at 3 38 . A N. S. limbs micr. in rev. . - . Variation of declination in 3m. Is. Corr. for diam, of micr. wires . Observed N, S. diameter . . Results. ll. 111. 8. a. Rev. / H . 3 4 38.21 13.298 . ... =4 19.18 . 3 4 52.80 11.051 . ... 3 35.38 . 3 33 3.52 — 12.11 .... 13.456 , ... 4 22.26 . 3 38 10.60 — 12.03 .... — 11.305 . ... =3 41.50 m. «. h. m. s. . + I 27.96 Santiago sid. time N. F. ... ... 3 6 6.17 . + 1 27.96 ... 3 6 20.76 Interval . . . 14.59 a h. m. H 2.247 = 43.79 A p at 3 6 0.93 + 0.03 A p at 3 6 0.77 — 2.20 41 62 m. s. h. m. s. . + 1 28.03 Santiago sid. time N. F. . . . ... 3 36 31.55 . + 1 28.03 Santiago sid. lime 3. F. ... . . . 3 39 38.63 ... 3 7.08 „ h. in. // 2.091=40.75 A p at 3 37 0.48 + 0.37 A p at 3 40 0.39 — 2.20 38.92 AUGUST Hii, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. A I. Air. Wet. s. e. B. s. s. h. m. s. Rev. s. Rev. Inches. • * 1 Bessel ... 273 3.5 3 25 3.48 — 15.35J 27.942 34.0 33.4 2 Venus . . . N.F. . . . . 21.5 . . 3 25 21.48 8.12 +18.00 +7.23} 3 4 5 G 7 80 9 10 11 12 a II 14 a Bcasel ... 273 Venus . . S.F. Bessel . . . 273 Venus . . . N.F. Besnel ... 273 Venus . . . S.F. Bessel ... 373 Vnms . . . N.F. Bcssel ... 273 Venus . . . S.F. Bessel ... 273 \Viiu.-i . . . N.F. 57.3 59.5 • • 40.5 3 2821.78 3 28 40.48 3 31 23.98 3 31 43.18 14.03 4.63 14.77 7.61 14.35 4.86 14.08 6.81 13.56 4.25 13.33 — 6.26i 18.70 19.20 +18.50 9.39 7.16 9.49 7.27 9.31 +7.06J Ther. alt. 52°. 9 Bar. reil. to 32" F. 97.880 1 43.2 • • 9.5 46.5 3 34 46.48 3 38 33.98 3 38 52. -i8 52.5 • • • • • • • • 54.3 • • • • 3 42 54.28 56.0 3 45 55.98 38' 298 INFERIOR CONJUNCTION OF VENUS, 1852, AUGUST 38, 1853— Continued. Remarks. The planet was so very badly defined and unsteady that it was impossible to make even a second-rate measure. The star is extremely small for a Oth magnitude. There is another preceding it, and some 18 revolutions farther north. « Omitted in the results. Results. Mean S. F. . . Mean N. F. . . Correction for chronometer at 3 29 Correction for chronometer at 3 32 A N. S. limbs micr. in rev. Variation of declination in 3 Corr. for diam. of micr. wires . Observed N. S. diameter h. m. s. s. Kcv. / n ransit . . . . 3 28 40.48 + 18.70 .... +9.390 . . . . =3 3.01 > transits . . . 3 31 59.05 + 18.57 .... +7.222 . . . . =220.76 h. m. m. s. h. m. s. 'rat 3 29 . . . +1 31.58 3 30 12.06 T at 3 32 + 1 31.58 3 33 30.63 Interval 3 18.57 // h. m. n 2.168 — 42.25 A f at 3 30 . . . 0.40 , 3mt ]9S. — 0.35 . . . 0 28 ires . . . — 2.20 39.70 AUGUST 83, 1858. No. for reference. ' Object. Chronometer time of transit. Hean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. I). E. A a. A-'.'! 34.3 46.4 58.8 4 22 34.20 —4.25 1 +1 13.68 —2.44 Remarks. Cleared for a little while at times, though there never was a sharp image of the planet. a Obscured by clouds. 6 Daylight. Results. h. in. s. m. s. Rev. / 11 Mean S.F. . . . Three transits ..46 25.60 •f 1 11.85 .... —0.198 . . , . =0 3.86 Mean N. F. . . . Four transits . ..46 59.29 •f 1 12.08 .... —2.296 . . , . =044.75 N. m. m. s. b. m. s. Correction for chronometer at 4 6 . . . -f 1 56.31 4 8 21.91 _|_ l 56,31 4 8 55.60 33.69 */ h. m. // A N S limbs luicr in rev 2 098 — 40 88 . . . . 0.06 0.02 . . . . 0.00 Corr. for diam. of micr. wires . . . — 2.20 Observed N. S. diameter .... 38.68 AUGUST 31, 1853. No. for reference. Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. Ad. Air. Wet. 8. s. s. 8. s. h. m. s. Rev. m. s. Rev. Inches. a • 1 2 Vriiiis 56.0 3 45 55.98 —3.45 +4.54 —7.99 28.077 Ther.att. 52°. 1 47.4 45.5 B easel ... 273 Remarks. There was m-vor an imaae which could be measured within 'J , th" planet appealing as if Moating in disturbed mercury up to 4*. sid. time. Star nut visible under illumination until tile planet had passed out of the Held. Gave up the attempt to measure in de>|>Hir. 300 INFERIOR CONJUNCTION OF VENUS, 1852, SEPTEMBER 1, 1858. | Chronometer time of transit. Planet— Star. Bar Thermometers. | E Object. A. B. C. V. E. A a. AS. Air. Wet. & c a. 8. s. s. s. h. in. E. Rev. in. s. Rev. Inches. 0 B X I Bessel ... 273 57.5 9.5 21.5 3 57 9.50 +3.22 28.180 40.8 38.2 2 Venus . . . S.F. 10.0 22.7 34.6 47.2 59.5 3 59 34.80 —5.13 +2 25.30 —8.35 Ther. alt. 3 Bcssel . . . 273 16.0 41.5 53.5 t ( 4 2 41.08 +4.17 53°. 1 4 Venus . . . N.F. 41.7 53.8 6.5 19.5 31.2 4 5 6.54 —6.10 2 25.46 10.27 Bar. red. to 32° F. 28.118 5 Bcssel ... 273 46.8 12.5 4 7 59.67 +4.70J 6 Venus . . . S.F. 1.0 13.0 25.3 38.2 50.0 4 10 25.50 —3.85 2 25.83 8.55J 7 Bessel . . . 273 40.5 53.0 5.0 18.5 4 14 5.37 +4.97 8 Venus . . . N.F. 7.5 20.3 32.5 45 5 57.8 4 16 32.72 —5.33 2 27.35 10.30 9a Bessel ... 273 2.5 14.0 26.5 4 19 14.33 +5.84 10 Venus . . . S.F. 16.5 S9.0 41.5 54.5 6.5 4 21 41.60 —2.45 2 27.37 8.29 111 Bessel ... 273 3J.O 44.0 8.6 4 25 44.11 +7.16 12 Venus . . . N.F. 47.5 0.0 12.3 25.0 36.8 4 28 12.33 — 3.34J +2 28.21 — 10.50J Remarks. Quite sharp and steady images ; and the observations might have been commenced earlier, but that tlie oil was so congealed the k.mps would not burn. a Good measures. b Good measures. Daylight. Diameter of Venus from a mean of 6 measures, at 4A. 42m. sid. time, 1.868 rev. Corrected diameter, 34". 21. Results. h. m. s. m. s. Rev. / // Mean S. F. . . Three transits . . . 4 10 33.97 + 2 26.13 . . , . _ 8.398 . . . . =2 43.68 Mean N. F. . . Three transits . . . 4 16 37.19 + 2 27.01 .... —10.358 . . . . =321.88 b. m. m. s. h. m. s. Correction for chronometer at 4 11 . . . -f-2 6.11 Correction for chronometer at 4 17 . . . +2 6.10 it It. m. n A N. S. limbs micr. in rev. . . . . 1.960=38.20 A pat 4 Jl Variation of declination in 6m. 3s. . + 0,05 A pat 4 17 Corr. for dmm. of micr. wires . . — a. 20 Observed N. S. diameter . 36.05 SEPTEMBER 3, 1858. 1 Object. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. An. A* Air. Wet. s. 8. 8. 8. s. h. in. s. Rev. m. s. Rev. Inches. • ' 1 3 3 4 5 6 7o 8 Bessel ... 273 Venus . . . S.F. Bessel ... 273 Venus . . . N.F. Bessel ... 273 Venus . . . S.F. Bessel ... 273 Venus . . . N.F. 44.5 48.0 0.5 5.0 33.0 39.3 8.0 15.4 56.0 0.3 12.5 17.5 45.5 51.0 20.2 27.5 3 33 31.89 3 38 35.44 3 41 47 75 3 46 52.50 3 50 20.26 3 55 26.06 3 57 55.36 4 3 2.60 +4.41 —2.71 +4.78 -4.36 +5.61 —1.65 +6.37 — 2.65J +5 3.55 5 4.75 5 5.80 +5 7.24 —7.12 9.14 7.26 — 9.23J 28.140 Thrr. alt. 50°. 7 Bar. red. to 32° F. 28.085 38.1 37.8 10.1 27.5 55.0 0.8 30.6 37.5 23.3 35.0 40.0 7.8 13.2 43.0 50.1 35.5 47.5 52.5 20.0 26.0 55.0 2.5 AT SANTIAGO DE CHILE. 301 SEPTEMBER 3, 1852— Continued. i Chronometer time of transit. Planet — Star. Thermometers. i Object. A. B. C. D. 11. A 0. A& Air. Wet. ,8 6 8. s. s. s. ft h. in. s. Rev. m. s. Rev. Inches. O • 9 Bcsscl ... 273 7.0 19.5 33.0 44.0 4 8 19.50 +2.98 28.140 38.1 37.8 10 Venus . . . S.F. 2.5 15.0 27.5 40.4 52.5 4 13 27.58 —4.19 +5 8.08 —7.15 11 Bessel . . . 273 43.5 55.5 8.0 21.0 33.0 4 16 8.20 +4.21 Thcr. att. 50". 7 12 Venus , . . N.F. 52.0 4.5 16.5 29.5 41.5 4 21 16.80 —4.96 5 8.60 9.17 Bar. red. 134 Bessel ... 273 31.0 43.5 56.0 8.5 21.0 4 24 56.00 +5.10J 28.085 14 Venus . . , S.F. 41.0 53.5 6.0 18.8 30.6 4 30 5.98 —2.25 5 9.98 7.35J 15 Bessel ... 273 . . 50.2 3.0 15.5 27.5 4 37 2.93 +6.33J 1C, Venus , . . N.F. 49.6 2.0 14.5 27.3 39.0 4 42 14.48 —2.89 +5 11.55 — 9.22J Remarks. Blurred and unsteady images during the first three measures, a Sharp and good. 4 Daylight. Results. h. m. s. m. *. Rev. / /' Mean S. F. . . . Four transits ..44 23.76 + 5 6.85 . . . . —7.221 . . . . =2 20.74 Mean N.F. . . . Four transits . . 4 13 21 .59 + 5 8.03 . . . . —9.190 . . . . =259.12 h. m. m. s. h. m. s. Correction for chronometer at 4 4 . . . +2 8.55 Santiago sid. time S F 4 6 32 31 Correction for chronometer at 4 13 . . . +2 8.56 Santiago sid. time N F. 4 15 30 15 Interval . . 8 57.84 A N. S. limbs micr. in rev 1.969 = 38.38 Variation of declination in 8m. 58s. . . + 0.20 Corr. for diam. of micr. wires ... — 2.20 Observed N. S. diameter ... 36.38 h. m. // A pat 4 4 0.26 A f at 4 13 0.89 SEPTEMBER 3, 1853. « fl Chronometer time of transit. Planet— Star. Thermometers. <£ g Object. A. B. C. D. E. A a. At Air. Wet. 1 a. s. 8. s. a. h. m. B. Rev. m. 8. Rev. Inches. O O la Venus . . . N.F. 27.5 40.0 52.5 4.5 16.5 3 41 52.20 +3.52 88.119 47.7 46.0 2 B.C. . . . 16068 30.5 44.0 56.0 8.5 21.0 3 45 56.00 —9.17 —4 3.80 +12.69 3 Venus . . . S.F. 24.5 37.2 49.6 2.8 15.2 3 49 49.86 +5.77 Ther. att. 55°. 2 4 H. C. . . . 16068 26.5 3 53 51 00 8 89 4 1 14 14 66 Bar. red. to 32° F. 5 Venus . . . N.F. 16.3 88.8 41.0 3 58 28.67 +4.84 28.051 6 II. C. . . . 16068 5.0 17.5 30.0 43.0 54.5 4 2 30.00 —7.95 4 1.33 12.79 74 Venus . . . S.F. 31.5 42.5 55.0 8.5 19.7 4 4 55.44 +7.37* 8 11. C. . . . 16068 31.5 • • 56.0 10.3 21.0 4 8 56.64 — 7.27f 4 1.20 14.65 9 Venus . . . N.F. 1.7 14.5 26.5 40.0 51.5 4 11 86.84 +6.06i 10 H. C. . . . 16068 2.5 15.5 27.5 41.2 52.0 4 15 27.74 —6.73 4 0.90 12.78J 11 Venus . . . S F. 29.5 41.8 54.0 7.5 19.2 4 17 54.40 +8.54i 12 H.C. . . . 16068 29.7 42.0 54.3 8.5 19.5 4 81 51.80 —6.04 —4 0.40 +14.58* 302 INFERIOR CONJUNCTION OF VENUS, 1852, SEPTEMBER 3, 1853— Continued. g Chronometer time of transit. Planet— Star. Thermometers. £ £ Of Object. A. B. C. D. E. A a. A,!. Air. Wet. a c s. 0. B. s. s. h. m. s. Rev. m. s. Rev. Inches. • O 13 c Venus . . . N.F. 54.5 6.5 19.0 32.5 43.5 4 24 19.20 + 7.32 28.119 47.7 46.0 14 H.C. . . . 16068 53.5 6.5 18.5 32.5 43.0 4 28 18.80 — 5.48J —3 59.60 +12.80J Ther. alt. 15 d 16 e Venus . . . S.F. H.C. . . . 16068 32.0 30.5 44.3 43.0 56.5 55.3 10.5 9.5 21.5 20.5 4 30 56.96 4 34 55.76 + 9.78 — 4.93 3 58.80 14.71 55° .2 Bar. red. to 32° F. 28.051 Venus N.F. 33.5 47.6 58.5 4 36 34.28 + 8.59 18 H.C. . . . 16068 6.7 19.5 32.0 46.0 56.2 4 40 32.08 - 4.33 3 57.80 12.92 19 Venus . . . S.F. 3.2 15.3 29.0 40.2 4 42 15.80 +10.96J 20 H.C. . . . 16068 47.5 0.5 12.5 26.5 37.0 4 46 12.80 — 3.73 —3 57.00 +14.69J Remarks. Images not very sharp, though the measures have generally been satisfactory. Lalande's magnitudes are full 1 greater than Bead's. a Recorded 50.5s. at wire C. c Tolerably sharp. I A hair was found on the inner lens of the eye-piece, d Daylight. holding wire D out of place. e Recorded 19.5s. at wire E. Results. h. m. s. in. s. Rev. / // Mean N. F. . . Five transits . . . 4 10 32.16 — 4 0.65 . . . +12.798 . . . . =4 9.43 Mean S. F. . . Five transits . . . 4 17 10.49 — 359.71 . . . +14.660 . ... =4 45.72 h. m. Correction for chronometer at 4 11 . Correction for chronometer at 4 17 . A N. S. limbs micr. in rev Variation of declination in 67ft. 38s. . Corr. for diam. of micr. wires . . . Observed N. S. diameter . s. . . +211.31 . . +211.32 // . 1.862 = 36.29 — 0.26 — 2.20 33.83 h. m. s. . . 4 12 43 47 Santiago sid. time S. F. ... . . . 4 19 21 81 Interval . . 6 38.34 h. m. A f at 4 15 // 0.41 0.43 SEPTEMBER 6, 1853. •S Chronometer time of transit. Planet— Star. Thermometers. a ta e £ £ Object. A. B. C. D. E. A a. A(J. Air. Wet. i s. E. s. 8. s. h, m. s. Rev. m. s. Rev. Inches. • O ~i Venus . . . N.F. 1.3 13.5 25.9 38.1 50.5 4 2 25.86 —6.36 28.156 39.0 38.1 2 Bessel ... 273 43.5 . . 7.6 20.0 32.5 4 4 7.84 6.42 —I 41.98 +0.06 Ther. att. 3 Venus . . . S.F. 6.8 19.1 31.5 43.0 56.0 4 6 31.28 4.00 52°. 9 4 Bessel . . . 273 48.6 0.5 13.0 25.3 38.0 4 8 13.08 5.93J 1 41.80 1.931 Bar. red. to 3-2° F. 28.094 5 Venus . . . N.F. 40.0 52.5 4.7 17.0 29.5 4 10 4.74 5.37 > 6 Bessel ... 373 21.5 33.5 45.7 57.7 10.5 4 11 45.78 5.58 1 41.04 0.21 7 Venus . . . S.F. 26.5 38.6 51.0 3.0 15.8 4 13 50.98 3.17 8 Bessel ... 273 so.o 31.8 44.5 4 15 32.10 T..1III 1 II. U 2.021 9 Venus . . . N.F. 53.5 6.0- 18.2 30.5 42.8 4 17 18,20 4.71 10 Bessel ... 273 34.0 46.5 59.0 10.5 4 18 58.60 —5.00 :— 1 40.40 +0.29 AT SANTIAGO DE CHILE. 303 SEPTEMBER U, 1853— font III Ilfscl ... 293 43.5 55.5 • • 20.0 32.5 4 38 7.67 —3.04 —1 38.01 +1.99 Remarks. Star excessively dim. Never a sharp or steady image. a Daylight. Results. h. m. s. m. s. Rev. / it MeanN. F. . . . Five transits . . . 4 17 38.48 — 1 40.27 .... -f 0.226 . . . . =0 4.40 Mean S. F. . . . Five transits . . . 4 21 33.50 — 1 40.03 .... +1.984 . . . . =0 38.67 h. m. m. s. h. m. s. Correction for chronometer at 4 18 . -J- 2 18.05 . . 4 19 56 53 Correction for chronometer flt 4 22 . . 4-2 18.05 4 23 51.55 3 55.02 // h. m. // A N S I'mh m' " v 1.758 = 34.26 . . . . 0.01 Vari'i ioi of declini io i' 3m 55s 0.33 . , . 0.06 Corr, for dinm. of micr. wires . . . — 2.20 Observed N. S. diameter .... 31.73 SEPTEMBER 7, 1853. • Chronometer time of transit. Planet— Star. Thermometers. 1 f ' Micr Bar. £ S £ Object. A. B. C. D. E. An. AS. Air. Wet. •S 1 s. S. 8. 8. s. h. m. s. Rev. m. s. Rev. Inches. • • 1 Bessol ... 273 2.0 15.0 26.5 38.5 3 57 14.38 —5.624 I ; 28.184 44.9 41.6 2 Venus . . . N.F. . 22.5 35.D 47.0 59.0 3 58 34.75 +1.66 +1 20.37 +7.28J • Then an. 3 Besscl . . . 273 26.5 02.0 4 4 27.02 — 5.031 54°. 0 4 Venus . . . S.F. 34.3 36.5 48.5 13.5 4 5 48.76 +4.21 1 21.74 9 „., Bar. ml. M 33° F. 28.059 5 Bessel ... 273 39.5 51.5 4.0 t t 4 851.50 —4.41 6 Venus . . . N.F. 49.0 1.3 13.3 25.0 38.1 4 10 13.34 +2.88i 1 21.84 J.3H 7 Bessel ... 273 51.0 3.0 15.5 4 13 3.00 —3.88 8 Venus . . . S.F. 0.0 13.4 25.6 37.6 50.3 4 14 25.38 +5.32 I •».>• 9.18 9 Bessel . . . 273 23.5 36.5 48.0 4 17 36.50 — 3.62J 10 Venus . . . N.F. M.O 46.0 58.2 11.0 23.6 4 18 58.56 +3.75 +1 22.06 +7.37J 304 INFERIOR CONJUNCTION OF VENUS, 1852, SEPTEMBER 7, 185 '•*— Continued. Chronometer time of tian*it. Planet— Star. ThermcjiR'U'rs. \T •" > ' ' Micr Object. A. B. C. D. E. A a. AS. Air. Wet. 6 6. B. s. s. s. li. m. s. Rev. m. s. Rev. Inches. o ° 1C. 11 Bessel ... 273 23.5 3G.O ( _ 4 21 35.77 —3.34 28.124 44.9 41.6 12 Vrrms . . . S.F. 33.7 46.8 59.0 11.2 23.6 4 22 58.86 +5.85 +1 23.09 +9.19 Ther. alt 13 Besscl ... 273 11.0 23.0 35.2 4 26 23.07 -2.80 54°. 0 14 Venus . . . N.F. 22.2 34.5 46.8 10.5 4 27 46.58 +4.63 1 23.49 7.43 Bar. red. to 33° F. 28.059 15 Besscl ... 273 53.5 5.5 18.0 . . 4 32 5.67 —1.81 16 Venus . . . S.F. 5.5 18.2 30.3 42.5 55.0 4 33 30.30 +7.40 +1 24.63 +9.21 Remarks. Planet so blurred and unsteady, and rtar so dimly seen through the haze, that the measures have scarcely been worth copying. Results. h. m. s. m. s. Rev. / u Mean N. F. . . Four transits . . . 4 13 53.40 + 1 21.94 . . . +7.371 . . . . =2 23.66 Mean S. F. . . Four transits . . . 4 19 10.82 + 1 22.96 . . . +9.206 . . . . =2 59.42 h. m. m. s. h. in. s. P t" fnr rhrnnomptpr at 4 14 + 2 21.16 4 16 14.56 . . +2 21.17 4 21 31.99 Interval . . . 5 17 43 „ h. m. A N. S. limbs micr. in rev. ... 1.835 = 35.76 A p at 4 16 0 28 Variation of declination in 5m. 17s. . . — 0.53 A pat 4 21 . . . 0.32 Corr. for diam. of micr. wires . . . . — 2.20 Observed N. S. diameter .... . . 33.03 SEPTEMBER 8, 1853. i Chronometer time of transit. Micr. Planet— Star. Rlr Thermometers. £ Object. A. B. C. D. E. A a. AS. oar. Air. Wet. s CG 1 B. s. s. s. s. h. m. s. Rev. m. a. Rev. Inches. « ' 1 Bessel ... 273 50.0 2.0 14.5 . t 3 42 2.17 + 6.77J 28.000 47.0 43.9 2 Venus . . . S.F. . . 7.3 20.0 31.5 . . 3 43 19.60 —10.41 +1 17.43 — 17.18J 3 Bessel ... 273 88. 5 10.5 . . 3 46 10.53 + 6.74 Ther. att. 54°. 0 4 Venus . . . N.F. 16.0 28.5 40.5 3 47 28.33 —12.34 1 17.80 19.08 Bar red. to 32° F. 5 Bessel ... 273 52. 0 4.3 16.5 . . 3 50 16.50 + 7.04 27.935 6 Venus . . . S.F. • • 22.5 34.6 46.3 59.0 3 51 34.48 —10.30 1 17.98 17.34 7 Bessel ... 273 9.5 22.0 34.3 3 54 34.17 + 7.27 8 Venus . . . N.F. • • 40.9 52.5 5.0 17.5 3 55 52.85 —11.72 1 18.68 18.99 9 Bessel ... 273 3.0 15.0 27.5 . . 3 58 27.40 + 7.53 10 Venus . . . S.F. 21.5 34.0 46.5 59.0 11.2 3 59 46.44 — 9.81 1 19.04 17.34 11 Besscl ... 273 44.0 57.0 4 1 56.53 + 7.68 11 Venus . . . N.F. 4.5 16.7 99.0 41.5 4 3 16.80 —11.31 1 20.27 18.99 13 Bessel ... 273 41.5 54.0 6.3 47 6.17 + I1.0.V H Venus . . . S.F. • • 14.5 26.5 38.8 51.3 4 8 96.65 — 6.30 +1 20.48 — 17.35i AT SANTIAGO DB CHILE. 305 SEPTEMBER 8, 1853— Continued. No. for reference. Object.. Chronometer time of transit. Mean of wires. Micr. Planet— Star. Bar. Thermometers. A. B. C. D. E. A a. AJ. Air. Wet. s. s. s. s. s. h. in. s. Rev. in. s. Rev. Inches. • • 15 Bcssel . . . 273 22.7 35.3 47.6 , . 4 11 47.44 +11.46 28.000 47.5 43.6 16 Venus . . . N.F. 44.0 56.5 8.5 20.5 33.0 4 13 8.50 — 7.53 +1 21.06 —18.99 17 18 19 Ues-.-l ... 273 Venus . . . S F. lie.-sd ... 273 17.5 39.5 28.0 30.3 52.0 40.5 42.3 4.3 52.5 16.5 28.8 4 15 42.27 4 17 4.22 4 20 52.57 +11.62 — 5.59 +12.211 1 21.95 17.21 Tlicr. att. 54°. 0 Bar. red. to 32° P. 27.1135 20 Venus . . . N.F. • • 2.5 15.0 26.5 .39.5 4 22 14.75 — 6.86 1 22.18 19.07i 21 Bessel . . . 273 21.5 34.3 46.4 , t 4 24 46.31 +12.60 22 Venus . . . S.F. 44.0 56.5 9.0 20.6 33.5 4 26 8.72 — 4.69 1 22.41 17.29 o:i Bessel . . . 273 13.5 25.8 38.0 . 4 28 38.01 +12.86 24 Venus . . . N.F. 36.5 49.0 1.2 13.2 23.5 4 30 1.08 — 6.09i 1 23.07 18.95J 25 Bessel ... 273 19.5 32.5 44.6 . . 4 32 44.44 +13.24 BO Venus . . . S.F. 43.0 56.0 8.0 20.3 32.6 4 34 7.98 — 3.92 1 23.54 17.16 27 lie.-sel . . . 273 59.5 12.5 24.6 4 37 24.44 +13.65J 28 29 a 30 Venus . . . N.F. Bessel . . . 273 Venus . . . S.F. 24.3 38.0 3.3 36.5 51.0 15.5 48.5 1.5 13.5 4 38 48.86 4 42 2.97 4 43 27.92 — 5.36i +14.01 — 3.09 1 24.42 1 24.95 19.02 17.10 28.0 40.3 52.5 31 Bessel ... 273 16.8 29.5 41.5 t t 4 45 41.51 +14.30 3-2 Venus . . . N.F. 42.3 55.5 7.5 19.5 32.0 4 47 7.36 — 4.53^ 1 25.85 18.83J 33 Bi'Mtl . . . 273 39.6 52.1 4.4 . . 4 49 4.27 +14.61 34 Venus . . . S.F. 5.5 17.5 30.3 42.2 54.7 4 50 30.04 — 2.60 1 25.77 17.21 35 lle-^e] ... 273 18.5 31.0 43.4 . 4 52 43.21 +14.92± 36 Venus . . . N.F. 45.0 57.3 9.5 21.5 34.3 4 54 9.52 — 3.92 1 26.31 18.84J 37 Bcssel . . . .273 57.5 10.0 | 23.0 4 57 22.41 +15.23J 38 Venus . . . S.F. 24 7 37.0 49.3 1.5 14.0 4 58 49.30 - l.'Jl 1 26.89 17.14J 39 Bcssel ... 273 . 22.0 33.5 4 5'J 33.86 +15 43 40 Venus . . . N.F. 35.5 48.0 0.5 12.7 25.3 • 5 1 0.40 — 3.32 +1 26.54 —18.75 Remarks. Sharp images after the second measure, though wavy in motion throughout. a Daylight. Results. h. in. s. m. s. Rev. i n Mean S. F. . . . Ten transits . . . 4 21 19.53 + 1 22.04 .... —17.233 . . . . =535.87 Mean N. F. . . . Ten transits . . . 4 25 24.84 + 1 22.62 .... — 18.953 . . . . =6 9.39 h. m. m. s. h. m. s. , t •4-2 23 75 . . 4 23 43.28 Correction lor clirononietcr at 4 iil . Correction for chronometer at 4 25 . . . +2 23.75 Santiago sid. time N. F . . 4 27 48.59 I t Vll . . 4 5.31 „ h. m. n _ , . . . . 0.60 A N. S. limbs micr. in rev . 1. <2U = JJ.oJ + n "\ci .... 0,63 Corn for diam. of micr, wires . . . — 2.20 Observed N. S. diameter . , . . 31.82 39 ° MARS AND VENUS, 1850-52. OBSERVATIONS THE MERIDIAN CIRCLE, OBSERVATORY, SANTIAGO DE CHILE, BY THE U. 8. NAVAL ASTRONOMICAL EXPEDITION. OPPOSITION OF MARS, 1851-52. MERIDIAN CIRCLE OBSERVATIONS. No. for reference. Date. Object. Observed transit reduced to mean of wires. Corrections for Apparent A. it. observed. Circle reading, mr.in of four microscopes. Refrac- tion. Nadir. Corr'n for semid. Observed apparent declination. i2 o lust. Clock. 1 2a 3 41 5 6 7c 8 Vd 10 0. So din. that 11 is IIHTI' L'llr-s Work. ARumkcr, 3ni mien Refrac- tion. Nadir. Corr'n for pcniid. Observed apparent declination. Inst. Clock. 1 9a 3 4 5 6 74 8 9 10 c 11 12 13 14 154 i«k 17 18 19 SO, 21 22 23 24 25 26 27 28/ 29 30 31 32 33 34« 33 36 37 38 39 40 41 42 43 44 1852. Jan. 13 14 15 16 17 18 19 20 21 22 23 Besscl . . .278 Mars .... N.P. h. m. s. 846 9.14 8 47 11.59 9 13 22.60 9 20 30.56 8 34 54.60 8 44 26.85 8 45 43.21 9 13 23.21 9 20 31.08 8 34 54.73 8 44 10.53 9 13 23.56 9 20 3) .23 8 42 38.50 8 45 56.90 9 13 23.84 9 20 31.68 8 24 27.11 8 41 2.23 8 45 40 48 9 13 24.21 9 20 31.86 8 24 27.26 8 39 26.97 9 13 24.28 9 20 31.93 8 11 56.48 8 24 27.56 8 34 55.10 8 37 48.27 9 13 24.50 9 20 32.20 8 11 57.16 8 36 11.38 8 11 57.11 8 22 58.46 8 34 30.46 9 13 25.16 9 20 32.80 8 11 57.57 6 23 58.88 8 32 51.98 8 11 58.00 8 22 59.38 s. +0.662 + .603 —1.290 + .177 .633 .566 + .583 —1.459 + .143 + .737 —1.508 -f .169 .769 + .771 —1.421 + .214 .875 .860 + .860 —1.570 + .239 .an + .858 — 1.5S7 + .230 .879 .881 .787 -f .849 —1.622 -f- .211 .887 .859 .894 .895 + .868 —1.579 + .234 .731 .733 .710 .719 + .722 s. —11.53 11.53 11 .M 11.54 11.93 11.94 11.94 11.94 11.94 12.29 12.29 12.30 12.30 12.70 12.70 12.71 12.71 12.86 12.86 12.86 12.87 12.87 12.90 12.90 12.90 12.90 13.21 13.21 13.21 13.21 13.22 13.22 13.48 13.49 13.76 13.77 13.77 13.77 13.77 13.85 13.85 13.86 14.43 -14.43 h. m. s. 8 45 58.27 8 47 0.6C 9 13 9.77 9 20 19.20 8 34 43.30 8 44 15.48 8 45 31.85 9 13 9.81 9 20 19.28 8 34 43. 17 8 43 58.98 9 13 9.75 9 20 19.10 8 42 26.57 8 45 44.97 9 13 9.71 9 20 19.18 8 24 15.13 8 40 50.23 8 45 28.48 9 13 9.77 9 20 19.23 8 24 15.23 8 39 14.93 9 13 9.79 9 20 19.26 8 11 44.15 8 24 15.23 8 34 42.68 8 37 35.91 9 13 9.66 9 20 19.19 8 11 44.57 8 35 58.75 8 11 44.24 8 22 45.59 8 34 17.56 9 13 9.81 9 20 19.26 8 11 44.45 8 22 45.76 8 32 38.83 8 11 44.39 8 22 45.67 ° / // 304 12 10.78 304 11 16.39 •J."> 12 18.55 334 35 9.00 304 35 6.68 304 0 58.25 304 4 25.25 25 1221.38 334 35 9.20 304 35 8.92 303 56 54.72 25 12 25.22 334 35 11.78 303 49 59.78 303 48 21.78 35 12 24.38 334 35 11.05 303 0 0.65 303 42 38.58 303 43 19.08 25 12 22.68 334 35 9.55 302 59 58.90 303 35 54.70 35 12 21.50 334 35 10.00 302 5 57.68 303 28 45.82 25 12 21.88 334 35 12.63 302 5 58.88 303 21 52.12 302 6 1.82 302 0 27.32 303 15 11.35 25 12 21.35 334 35 8.90 302 5 57.08 302 0 25.02 303 8 55.80 302 5 57.98 302 0 25.65 / /» —1 20.00 --1 20.04 + 25.65 — 25.89 1 16.90 1 18.55 —1 18.38 + 25.01 — 35,30 1 17.62 —1 19.49 + 25.25 — 35.49 1 19.31 —1 19.39 + 25.08 — 25.32 1 21.36 1 19.35 — 1 19.32 + 24.98 — 35.19 1 21.98 —1 20.31 -f 25.18 — 25.47 1 24.47 — 1 20.35 + 25.08 — 25.32 1 24.17 1 20.63 1 24.91 1 25.22 — 1 21.28 + 25.18 — 25.42 1 34.87 1 35.17 1 31.64 1 25.20 — 1 25.47 // + 0.8 — 0.7 1.7 3.0 — 2.1 + 0.9 + 1.3 — 0.6 — 0.4 + 3.6 + 1.0 +0.6 —6.7 +6.7 -6.7 +6.7 —6.7 +6.7 +6.7 +6.7 -6.7 » / /; +22 22 42.53 +22 23 30.36 —58 39 10.89 — 81 9.80 +21 59 45.03 22 33 55.11 +22 30 34.64 —58 39 11.58 — 81 9.09 +21 59 44.51 +22 37 53.88 —58 39 14.66 — 81 10.48 +22 45 3.34 +22 46 34.72 —58 39 12.35 — 81 8.62 +33 34 56.93 22 52 10.28 +22 51 36.46 —58 39 11.45 — 8 1 8.15 +23 34 56.29 +22 59 5.52 —58 39 13.47 — 8 1 11.32 +24 28 59.60 +23 6 0.64 —58 39 14.15 — 81 14.49 +24 29 0.00 23 12 56.52 24 28 57.60 24 34 32.41 +23 19 37.84 —58 39 12.02 — 81 8.97 +24 28 58.30 24 34 30.66 23 26 3.05 34 29 0.33 +24 31 32.93 G. G. G. 6. 6. G. G. M. G. P. M. Besscl . . .278 Mars .... N.P. a Hydra: .... Mars .... S.F. H. C 17528 ( Argus 32 Cancri .... Mars .... N.P. H. C 17513 32 Cancri .... Mars .... S.F. 3-2 Cancri .... W. C. Mars . . . .N.P. \ Cancri Mars .... N.F. v' Cancri Mars .... N.P. t Argus a Hydra; A Cancri tis Cancri . . . . • Mara .... S.F. va Cancri .... a Mars N. P. north of Vessel 278, 1 .94J rev. = 54". 35. b Mars S. F. soutli of Besscl 278, 7.41 rev. = 3' 37".00. There was, probably, an error of 1 rev. in reading the micrometer, and it should have been 6.41 rev.=2' 59".01. The declination then becomes +22" 31' 2" .63. c Measures maile with inapiiifyins power 141, and the aperture di- minished to two inches. All the observations were in the highest possible degree satisfactory. d H. C. 17528 north of Mars S. F., 3.51 rev. = 1' 38".00. c H. C. 17513 south of Mars N. P., 1.45 rev.=40".50. /32 Cancri was accidentally observed on the micrometer wire, and, li.rict'ore, its declination is not given. •_• Hnii'vcil l" liav bee Ill lulluwiiiK. 312 MERIDIAN CIRCLE OBSERVATIONS, 185L-52. No. for reference. Date. Object. Observed Iran-it reduced to mean of wires. Corrections for Apparent A. It. observed. Circle reading, mean of four microscopes. Refrac- tion. Nadir. Corr'n for semid. ( ihserved apparent declination. Observer. Inst. Clock. 1 2 3a 4 51 6 •; . 8 9i 10 11 13 14 16 17 18 19 20 22 23 M 26 27 28 29 30 A 81 32 34 t 35 36 37 38 39 40* 41 42 f 43 44 laoa. Jan. 23 at •>-, 28 *29 30 31 Feb. 1 2 3 4 h. in. s. Mars . . N.P. a 31 10.U3 A Cancri 811 58.46 s. +0.700 .738 .748 .665 .781 ,660 .670 .648 + .587 —1.384 + .122 .558 .640 .631 .632 .739 .774 .710 .764 .922 + 893 -1.1B7S +1.009 I.J53 1.045 + .610 —1.815 + .739 .774 .716 .712 .748 .746 + .747 —1.625 + .096 .706 .686 .687 .933 .988 .992 + .774 -14.43 14.78 14.79 14.79 14. 79 15.42 15.42 15.42 15.42 15.44 15.44 16.68 16.69 16.70 16.70 17.49 17.50 17.50 17.51 18.46 18.47 18 49 18.81 18.81 18.81 18.82 18.83 19.26 19.26 19.27 19.33 19.33 19.33 19.33 19.35 19.35 19.90 19.90 19.90 19.90 20.05 20.05 20.05 —20.35 li. in. s. 8 30 56.90 8 11 44 42 8 17 51.97 8 28 15.34 8 29 17.10 8 11 44.38 8 17 51.83 8 27 35.07 828 15.10 9 13 9.98 9 20 19.44 7 57 50.49 8 11 44.33 8 24 14.53 8 27 32.17 7 57 50.46 8 11 44.37 8 16 .T6.37 8 22 36.05 7 57 50.27 8 20 56.05 9 13 9.99 7 57 50.37 8 11 44.38 8 19 19.54 8 38 56.80 9 13 10.09 7 57 50.16 .8 11 44.12 8 17 41.86 7 57 50.38 8 11 44.25 8 16 7.69 8 16 9.13 9 13 10.05 9 20 19.56 7 57 49.98 8 11 44.00 8 14 32.97 8 16 8.68 8 11 4-1.40 8 13 2.41 8 19 50.52 8 11 31.13 0 / // 303 2 12.02 302 5 57.10 301 31 0.68 302 49 19.65 302 56 12.09 302 558.12 301 34 4.63 302 49 56.98 302 49 24.38 25 12 23.32 334 35 10.83 303 42 18.75 302 5 58.05 302 Sf 302 36 49.82 303 42 15.02 302 6 1.32 302 33 25.30 302 33 12.45 303 42 19.80 302 27 45.58 25 12 26.80 303 42 16.42 302 6 0.45 302 22 54.83 319 36 51.63 25 12 27.20 303 42 17.78 302 6 1.30 302 17 53.55 303 42 18.65 302 5 57.95 302 13 35.72 302 9 56.52 25 12 28.75 334 35 14.95 303 42 15.18 302 5 57.65 302 8 56.83 302 9 53.33 302 5 56.00 302 5 2.40 301 57 3.92 302 1 5.70 — 1 22.16 1 25.14 1 26.91 1 22.84 1 22.48 1 24.50 1 26.44 1 22.59 —1 22.62 + 25.19 — 25.43 1 19.30 1 24.41 1 22.84 1 22.92 1 19.6(5 1 24.68 1 23.20 1 23.26 1 20.77 — 1 24.59 + 26.07 1 20.11 1 25.17 1 24.25 — 45.67 + 25.30 1 19.35 1 24.32 1 23.61 1 18.88 1 23.85 1 23.56 — 1 23.75 + 24.95 — 25.18 1 18.84 1 23.80 1 23.56 1 23.51 1 24.03 1 24.07 1 2-1.50 — 1 24.81 n + 1.0 + 2.0 — 0.5 + 0.1 3.5 • 0.4 + 0.6 — 1.2 — 2.5 + 2.3 1.7 + 1.1 +6.7 -6.7 +6.7 +6.7 —6.7 +6.7 —6.7 +6.6 —6.6 +6.6 —6.6 +6.5 +23 32 36.55 2429 0.15 25 0 58.34 23 45 35.30 23 38 49.20 24 29 1.01 25 0 56.42 23 44 53.52 +23 45 32.85 —58 39 13.90 — 8 1 10.79 +22 52 34.56 24 29 0.37 23 56 27.33 23 58 7.11 22 52 35.25 24 28 56.97 • 24 1 28.51 24 1 48.12 22 52 34.68 +24 7 6.02 —58 39 19.16 +22 52 37.20 24 28 58.23 24 12 9.64 + 6 57 27.55 —58 39 18.99 +22 52 36.88 24 28 58.33 24 16 58.77 22 52 36.84 24 28 57.51 21 21 31.05 +24 25 3.84 —58 39 17.09 — 8 1 13.16 +22 52 35.47 24 28 57.96 24 25 51.94 24 25 1.99 24 29 0.44 2-1 30 0.38 24 37 52>99 +24 33 45.62 M. P. G. M. •P. M. P. M. G. M. P. M. u1 Cancri .... Mars .... S.F. 8 18 6.01 8 28 29.46 f :>9 .'ii.iT 8 11 59.14 8 18 6 58 8 27 49.84 8 28 29.93 9 13 26.80 9 20 34.76 7 58 6.61 8 12 0.38 8 24 30.60 8 27 48.24 7 58 7.21 8 12 I. 10 8 16 53.10 8 22 52.80 -, 58 7.« 8 21 13.63 9 13 30.16 7 58 8.17 8 12 2.14 8 19 37.30 8 39 15.01 9 13 30.74 7 58 8.68 8 12 2.61 8 18 0.41 7 58 9.00 8 12 2.83 8 16 26.27 8 16 27.71 9 13 31.03 9 20 38.81 758 9.17 8 12 3.16 8 14 52.18 8 16 27.89 8 12 3.52 8 1321.47 8 20 9.58 8 11 50.71 vl Cancri .... Mars .... N.P. li. A. C. . . . 2703 Mars .... N.P. \V. C B. A. C. . . . 2703 H.C. . . . 16464 .Mars .... S.F. B. A. C. . . . 2703 Mars .... N.P. B. A. C. . . . 2703 A Cancri . ... Mars . . . .S.F. 11. A. C. . . . 2703 Mars .... N.P. B. A. C. . . . 2703 Mars .... S.F. Bessel ... 344 u Hydne B. A. C. . . . 2703 Mars .... N.P. Bessel . . .314 A Cancri Mars .... S.F. «• Cancri .... Mars .... N.P. a South, preceding star. b Mars S.F.,6th wire, — 3.33 rev. = 6' 52 '.41. t Double : the comparison star 8th magnitude, observed south pre- ceding. 1 314. ninth of Mars N.P., 1.17 rev. = 32".60. <• Wiishiii'.'tiiii. mirth of Mars N.P., 3.:);i rev. 1 ::3".00. / Diameter of Mars, 0.58 rev. = 16".20. K Diameter of Mars, 0.57 rev. = 15".90. 1 Diameter of Mars, 0.54 rev. = 15". 10. i Bessel 314, north of Mars S.F., 7.85 rev. = 3' 39".20. /.- He.-scl 311, south of Mars N. P., 2.02 rev. = 56" .50. ( Mars S.F., 4th wire, — 1.92 rev. ^53".60. * The nadir observed evidently changed from +3". 5; the adopted amount has been deduced from observations of standard stars on the same ni^ltt. AT SANTIAGO DE CHILE. 318 No. for reference. Date. Object. Observed transit ri'ilnredtomean of wires. Corrections for Apparent A.H. observed. Circle riMiliiiL'. infill) ni lour microscopes. Rffrac- tion. Nadir. Corr'n for scmid. Observed ;i|tjl.llrll! decimation. 1 Inst. Clock. la 3 3 4 II 6 7 8c 9 Wi n 12 13 e 11 is/ 16 If 18 19« 20 A SI 22 23 34 25 i 26 27 28 29 30 31 32 33 34 35* 361 37 38 39 40m 41 n 42 43 44o 45 j> 1852. Feb. 4 7 8 9 10 11 13 14 15 16 A Cancri h. m. s. B. s. • h. in. s. • / // 302 5 57.63 301 57 9.25 307 53 8.40 301 47 55.53 301 51 12.46 301 57 3.95 301 59 53.55 303 42 17.15 301 48 24.43 301 48 0.43 302 5 57.45 301 57 5.15 303 42 17.13 301 45 33.63 301 47 59.63 303 5 59.88 301 57 4.80 25 12 30.20 303 52 8.00 301 43 16.88 302 5 49.58 25 1223.28 301 39 42.05 301 42 12.72 301 40 56/32 302 5 51.08 25 12 23.13 334 35 S.08 301 39 41.45 301 37 23.38 302 5 49.13 25 12 23.65 334 35 6.35 301 34 34.23 301 39 46.86 301 35 59.73 302 551.93 25 12 27.00 301 34 40.58 301 39 52.71 301 34 52.18 303 5 54.93 301 34 38.90 301 39 49.03 301 34 3.30 / // — 1 24.58 1 25.26 1 8.42 1 24.04 1 23.86 1 23.55 1 23.37 1 18.66 1 24.57 1 24.59 1 23.62 1 24.10 1 13.65 1 24.71 1 24.57 1 23.70 — 1 24.18 + 24.87 — ] 18.38 1 24.95 — 1 33.76 + 24.94 — 1 25.86 1 25.71 1 25.79 — 1 24.45 + 25.09 — 25.33 1 25.52 1 25.65 — 1 24.17 + 24.99 — 25.23 1 26.23 1 25.94 1 26.15 — 1 24.52 + 25.12 — 1 26.33 1 26.04 1 26.32 1 24.61 1 26.07 1 25.79 — 1 26.11 + 1.1 0.2 1.5 1.2 9.8 7.9 9.6 6.3 4.7 + 4.9 // —6.5 -6.4 +6.4 —8.3 +6.3 6.3 6.2 +6.2 -6.1 +•24 28 59.96 24 37 49. Oj2 18 41 311.03 24 47 2.43 34 43 51.81 24 37 53.51 24 35 3.73 22 52 34.12 24 46 39.15 24 46 56.77 24 28 68.78 24 37 51.56 23 5234.43 24 49 17.59 24 46 57.85 24 28 56.73 +24 37 52.29 -58 3922.16 +22 42 34.59 24 51 38.68 +24 28 58.49 —58 39 23.91 +24 55 10.02 24 52 39.20 24 53 49.38 +24 28 59.58 -58 39 22.01 — 81 13.54 +24 55 8.58 24 57 20.58 +24 28 59.55 —58 3924.13 - 8 1 16.61 +25 0 19.81 24 55 6.89 24 58 48.03 +24 29 0.40 -58 39 24.31 +25 0 15.16 24 55 2.74 34 59 57.35 24 28 59.09 25 0 16.38 34 55 5.97 +25 0 59.12 M. P. G. G. M. G. G. M. G. M. v' Cancri .... 8 20 9.91 8 36 36.34 8 6 36.85 8 7 34.07 8 20 10.57 824 35 46 7 58 10.28 8 6 13 61 +0.775 .635 .721 .721 .773 .772 1.231 1.280 —20.35 20.35 20.97 20.97 20.97 20.97 21.55 21.56 8 19 50.34 8 36 16.63 8 6 16.60 8 7 13 82 8 19 50.37 8 24 15.26 7 57 49.96 8 5 53.33 Bessel ... 341 Mars .... S.P. «• Cancri .... 32 Cancri .... B. A. C , . . 2703 Mars .... S.F. Bessel ... 341 8 13 4.31 8 20 10.44 7 58 10.63 8 4 54.28 8 6 36.52 8 12 4.57 8 20 10.70 9 13 33.33 7 44 35.75 8 3 41.11 8 13 6.14 9 13 33.59 7 55 38.47 7 59 47.11 8 2 27.33 8 12 6.68 9 13 34.37 9 20 42.49 7 55 39.97 8 0 11.26 8 12 8.27 9 13 35.19 9 20 43.81 7 55 28.71 7 55 40.89 7 59 7.73 8 12 9.13 9 13 35.49 7 5529.08 7 55 41.29 7 58 6.87 8 13 9.38 7 55 29.44 7 55 41.57 7 57 ie.33 1.273 1.276 1.218 1.268 1.212 1.260 +1.263 —1.468 + .616 .703 + .6U7 —1.017 + .723 .778 .778 + .770 —1.217 + .228 .476 .476 + .470 - .817 + .126 .198 .198 .253 + .250 - .456 + .236 .226 .382 .277 .350 .250 +0.253 21.56 21.56 22.04 22.04 22 04 22.05 22.05 22.07 32.53 22.53 22.54 22.56 23.06 23.06 23.06 23.07 23.10 23.10 24.29 24.29 24.29 24.32 24.32 25.06 25.06 25.06 25.07 25.09 25.44 25.44 25.44 25.44 25.82 25.83 -25.82 8 11 44.02 8 19 50.16 7 57 49.81 8 4 33.51 8 6 15.69 8 11 43.78 8 19 49.91 9 13 9.79 7 44 13.84 8 3 19.28 8 11 44.30 9 13 10.01 7 55 16.13 7 59 24.83 8 2 5.05 8 11 44.38 9 13 10.05 9 20 19.62 7 55 16.16 7 59 47.45 8 11 44.45 9 13 10.05 9 20 19.62 7 55 3.85 7 55 16.03 7 58 42.92 8 11 44.31 9 13 9.94 7 55 3.87 7 55 16.08 7 57 41.71 8 11 44.33 7 55 3.87 7 55 16.00 7 56 44.76 11 • Cancri .... B. A. C. . . . 2703 Mara .... N.P. Bessel ... 341 «* Cancri .... 84 Geminorum . . . Mara .... S.F. H. C. ... 15707 Bessel ... 341 Mars .... N.r. H. C 15707 Mars .... N.P. Bessel . . .341 H. C 15707 Mars .... N.P. • Bessel ... 341 H. C 15707 Mars .... N.P. Bessel ... 341 H. C 15707 Mars .... S.F. a X Caned, 5th wire, + 1.35 rev. = 4' 51 ''.93. 6 Mars S. P., 5th wire, — 2.05 rev. = 3' 16". 93. Recorded north limb. There is evidently an error ill the R.A. ofBessel 341, not now explicable. c The axis was lowered during the afternoon, leaving the cast end high 0.72 div. and image of wire I), i). J 1 rev. west. d Bcsscl 341, north of Mars 8. F., 0.86 rev. = 24". 00. e The pulley being broken, the north roof iloor could not be opened. J Beuel 341, south of Man 8. P., 5.23 rev. = 2' 26" .00. g The azimuth was changed before observations. * Diameter of Mars, 0.50 rev. = 14".00. i Mare N. P., north of Besscl 341, 2.73i rev. = 1' 16" .45. * H. C. 15707, 5th wire, + 2.09 = 51 12".63. ( Mars N. P., 4th wire + 3.06 rev. = 1' 25".50. m H. C. 15707, 5th wire, + 2. 071 rev. = 5' 13".13. n Mare N. P., south of Besscl 341, 0.4IJ rev. = 11" .65. o H. C. 15707, 5th wire, + 2.00 rev. = 5< 10».13. f Mars 8. F., 4th wire, — 1.31 rev. = 36" .60. 40 314 MERIDIAN CIRCLE OBSERVATIONS, 1851-52, V 1 1 Date. Object. Observed trenail reduced to mean of wires. Corrections for Apparent A.R. observed. Circle reading, mean of four microscopes. Refrac- tion. Nadir. 3J s * Observed ,£ apparent V declination. o O Observer. Inst. Clock. 1 2 3 4 5 a 1 7 8 8 let n 13 13 14 15 16 c 17 18 d 19 20e 91 S3f S3 84 95* 96 97 38 99* 30 31 33 33 34 39 36 37 38 39 40 41 43 43 44 45 i 1853. Feb. 16 17 18 19 90 31 23 93 84 85 96 h. m. s. 8 13 9.91 9 13 36.47 9 20 45.46 7 55 29.85 7 56 14.83 8 12 10.21 9 13 37.39 9 20 45.83 7 55 24.85 7 55 30.36 8 12 10.76 8 18 18.20 9 13 37.90 9 20 46.49 7 54 36.15 7 55 30.80 8 12 11.11 8 18 18.61 7 53 52.59 7 55 31.03 8 12 11.46 8 18 18.86 7 40 10.13 7 53 10.46 7 55 31.15 8 12 11.60 7 40 10.26 7 52 32.47 7 54 42.53 8 12 11.60 7 40 10.74 7 51 58.59 7 55 31.70 8 12 12.14 7 40 11.16 7 51 28.93 8 12 12.64 6 39 6.93 7 40 11.44 7 47 34.90 7 50 50.54 7 58 18.87 7 40 11.91 7 47 35.33 7 50 37.57 8. +0.302 - .580 -f. .073 .640 .641 + .688 — .920 + .253 .551 .551 .597 + .548 — .874 + .202 .259 .359 .309 .314 .311 .255 .307 .311 .291 .302 .346 .398 .290 .301 .301 .297 .388 .299 .246 .295 .295 .306 .304 .020 .302 .314 .313 .297 .278 .391 +0.390 8. —25.82 25.84 25.85 26.40 26.40 26.40 26.43 26.43 27.00 27.00 27.01 27.01 27.02 27.02 27.11 27.11 27.12 27.12 27.59 27.59 27.60 27.60 27.64 27.64 27.64 27.64 27.93 27.93 27.93 27.94 28.22 28.22 28.22 28.23 28.71 28.71 28.72 28.99 29.00 29.00 29.00 29.01 29.40 29.40 —29.40 h. m. s. 8 11 44.39 9 13 10.05 9 20 19.68 7 55 4.09 7 55 49.07 8 11 44.50 9 13 10.04 9 20 19.65 7 54 58.40 7 55 3.91 8 11 44.35 8 17 51.74 9 13 10.00 9 20 19.67 7 53 9.30 7 55 3.95 8 11 44.30 8 17 51.80 7 53 25.31 7 55 3.70 8 11 44.17 8 17 51.57 7 39 42.78 7 52 43.12 7 55 3.76 8 11 44.26 7 39 42.62 7 52 4.84 7 54 14.90 8 11 43.96 7 39 42.81 7 51 30.67 7 55 3.73 8 11 44.21 7 39 42.75 7 51 0.53 8 11 44.22 6 38 37.96 7 39 42.74 7 47 6.21 7 50 21.85 7 57 50.16 7 39 42.79 7 47 6.22 7 50 8.46 « / // 302 5 54.45 25 12 31.08 334 35 9.93 301 34 35.70 301 32 59.30 302 5 53.05 25 12 29 33 334 35 10.97 301 32 41.23 301 34 34.33 302 5 52.77 301 33 58.15 25 12 28.70 334 35 11.60 301 32 3.75 301 34 34.08 302 5 55.38 301 33 57.40 301 32 10.33 301 34 38.16 302 554.15 301 34 59.28 303 4 41.62 301 31 54.95 301 34 37.45 302 5 53.45 303 4 44.55 301 32 13.42 301 35 7.42 302 5 55.83 303 4 45.50 301 32 38.12 301 34 38.68 302 5 55.52 303 4 43.25 301 33 26.80 302 5 53.65 343 4 58.50 303 4 43.85 301 31 54.00 301 33 57.43 303 42 12.72 303 4 43.42 301 31 52.20 301 35 5.23 / // — 1 24.36 + 25.10 — 25.37 1 26.46 1 26.55 — 1 24.74 + 25.11 — 25.37 1 27.67 1 27.56 1 25.92 — 1 27.71 + 25.56 — 25.79 1 26.45 1 26.31 1 24.58 1 26.34 1 26.21 1 26.07 1 24.35 1 26.05 1 30.21 1 25.35 1 25.10 1 23.51 1 30.97 1 25.91 1 25.74 1 24.06 1 21.55 1 26.57 1 36.45 1 24.86 1 20.80 1 25.65 1 23.88 16.08 1 21.08 1 26.04 1 25.91 1 19.22 1 30.17 1 25.07 — 1 24.90 n +4.9 6.9 6.0 3.5 2.9 6.4 2.7 4.6 4.7 4.5 +5.1 // * t n . . +24 28 59.12 . . —58 39 26.97 ..—81 15.35 . . '+25 0 17.97 +6.1 25 1 48.36 . . +24 28 58.90 . . —58 39 27.23 ..—81 18.39 —6.0 +25 2 20.55 . . 25 0 21.34 . . 24 29 1.26 . . +25 0 57.67 . . —58 39 26.15 ..-81 17.70 +6.0 +25 2 47.31 . . 25 0 22.84 . . 24 28 59.81 . . 25 0 59.55 —5.9 25 2 52.99 . . 25 0 19.12 . . 24 29 1.41 . . 24 59 57.98 . . 23 30 6.30 +5.9 j 25 2 52.11 . . 25 0 15.36 . . 24 28 57.77 . . 23 30 7.83 5.8 25 2 38.10 . . 24 59 49.73 . . 24 28 59.64 . . 23 30 5.56 +5.8 25 2 12.16 . . 35 0 17.38 . . ! 24 28 58.85 . . 23 30 6.96 -5.7 25 1 33.96 . . +24 28 59.64 . . —16 31 12.81 . . +23 30 6.84 . . | 25 3 1.65 +5.7 25 0 52.39 . . 33 52 36.11 . . 23 30 5.76 . . 25 3 1.88 -5.6 +24 59 54.28 M. P. M. P. .: M. P. G. P. M. P. M. Bessel ... 341 Mars .... N.P. Man .... S.F. Bessel ... 341 »' Cancri .... Mare .... N.P. Bessel ... 341 X Cancri »' Cancri .... Mara .... S.F. Bessel ... 341 »' Cancri .... 82 Geminorum . . . Mars .... N.P. Bessel ... 341 X Cancri . 82 Geminorum . . . Man .... N.P. Bessel ... 341 82 Geminorum . . . Mars .... N.P. Bessel ... 341 82 Geminorum . . . Mars .... S.F. X Cancri a Canis Maj. . . . 82 Geminorum . . . Bessel ... 341 Mars .... N.P. B. A. C. . . . 2703 82 Geminorum . . . Bessel ... 341 Man .... S.F. a Mars N. P., 4th wire, + 3.45 rev. = 1' 36".40. b Bessel 341, 4th wire, -f 4.05 rev. = 1' 53".10. c Bessel 341, 5th wire, — 3.72 rev. == 2' 30".33. d »' Cancri. Double; observed south, preceding star, e Bessel 341, 5th wire, — 3.81 rev. = 2' 27". 83. / Bessel 341, south of Mars 5.82 rev. = 2' 42" .50. £ v1 Cancri. Observed south, preceding star. A This was mistaken for Bessel 341, south of Mars N. P., 6.23 rev. = 2' 54".00. t Mars S. F., 5th wire, — 2. 19 rev. = 3' 13" .03. AT SANTIAGO DE CHILE. 315 g 13 — — 1 c S S 5 Corrections for 1 •s 2 1 Date. Object. B 3 ||| Apparent A. R. observed. Circle reading mean of fou microscopes Refrac- tion. Nadir. & Observed apparent declination. ( Inst. Clock. 6 ,i 5s* 0 0 1852. h.m. s. 8. B. h. m. s. • / » / ;/ II „ « , n 1 Feb. 26 9 13 39.94 —0.633 —29.42 9 13 9.89 25 12 33 88 IK I M. 2 9 20 48.97 -1- 047 29.42 9 go 19.60 334 35 12 05 — 24 88 +5.1 • — 58 39 29.52 3 27 82 Geminorum . . . 7 40 11.90 .261 29.45 7 39 42.71 303 4 42.62 1 30.40 5.1 — 81 18.16 +23 30 6.79 P. 4 Bessel ... 341 7 47 35.34 .274 39.45 7 47 6.16 301 31 53.88 1 25.37 , t . t 25 3 0.50 5a Mars .... N.P. 7 50 15.84 .372 39.45 7 49 46.66 301 35 59.71 1 25.15 , . +5.6 24 58 48.85 6 B. A. C. . . . 2703 7 58 19.23 .255 29.45 7 57 50.03 303 42 11.75 1 18.60 3252 35.86 7 28 82 Geminorum . . . 7 40 12.39 .330 29.92 7 39 42.80 303 4 45.08 1 21.63 5.2 2330 5.46 M. 8 Bessel . . .341 7 49 8.31 .388 29.92 7 48 38.68 301 40 46.68 1 36.14 . . , 34 54 8.37 9 Mars .... S.F. 7 49 59.89 '. .289 29.92 7 49 30.26 301 37 30.67 1 26.33 . . -5.5 34 57 30.06 10 B. A. C. . . . 2703 1 7 58 19.88 + .325 29.92 7 57 50.28 303 42 14.00 — 1 19.69 . . +22 52 34.60 11 — .726 29.94 9 13 10.02 25 12 33.48 + 25.15 KQ ou OQ TO 12 9 20 49.54 + .059 29.95 9 20 19.65 334 35 13.08 25.38 ' ' * * — 00 oy £y,l£ g 1 18 79 13 29 82 Geminorum . . . 7 40 12.76 .112 30.28 7 39 42.59 303 4 47.78 1 22.32 4.3 +23 30 4.35 G. 14 Bessel ... 341 7 49 8.58 .119 30.28 7 48 38.42 301 40 46.43 1 26.88 . . , . 24 54 10.26 1(1 Mars .... N.P. 7 49 45.02 .064 30.28 7 49 14.81 301 38 34.90 1 27.00 • • +5.5 24 56 16.41 16 Mar. 1 Bessel . . .341 7 49 8.90 .006 30.33 7 48 38.58 301 40 42.78 1 25.19 3.8 . 24 54 12.72 G. 17 c Mars .... S.F. 7 49 35.31 .006 30.33 7 49 4.99 30] 40 28.58 1 25.20 , . —5.4 34 54 32.33 18 Bessel . . .341 7 55 33.64 .061 30.34 7 55 3.36 301 34 35.58 1 25.64 • . 25 0 30.37 19 2 Bessel ... 341 7 49 9.58 .166 30.83 7 48 38.92 301 40 43.70 1 34.17 5.2 24 54 9.38 P. mt Mars .... N.P. 7 49 27.46 .221 30.83 7 48 56.85 301 41 51.56 1 24.28 +5.4 24 52 56.23 91 Bessel ... 341 7 55 34.44 + .222 30.83 7 55 3.83 301 34 33.62 — 1 24.68 . . +25 0 19.97 32 9 13 41.33 — .619 30.86 9 13 9.85 25 12 37.60 + 24.73 5g 39 32.92 33 9 20 50.49 + .002 30.86 9 20 19.63 334 35 13.43 — 24.96 — 81 19.56 34 3 Bessel . . .341 7 49 10.09 .224 31.17 7 48 39.15 301 40 45.05 1 25.25 4.8 • . +24 54 9.51 O. 25* Mars .... N.P. 7 49 23.31 .279 31.17 7 48 52.42 301 43 48.85 1 25.08 . . 5.3 34 51 0.24 | 96* Bessel ... 341 7 54 46.11 .325 31.17 7 54 15.17 301 35 1.38 1 25.68 • • • • 24 59 53.61 27 4 Mars .... N.P. 7 49 22.40 .335 31.51 7 48 51.23 301 45 49.02 1 24.72 5.3 5.3 24 48 59.21 P. 28 Bessel ... 341 7 55 35.14 + .281 31.51 7 55 3.91 301 34 34.82 -1 35.34 . . +25 0 19.33 29 9 13 42.23 — .808 31.53 9 13 9.89 25 12 38.13 + 24.81 —58 39 32.12 36 a Hydra 9 20 51.20 j+ .029 31.53 9 20 19.70 334 35 12.48 — 25.03 • • -81 18.64 31 6 H. C 15401 7 47 8.94 .184 32.22 7 46 36.90 301 50 4.42 1 24.35 5.0 +24 44 49.04 P. 32/ Mars .... N.P. 7 49 29.97 .184 32.22 7 48 57.93 301 50 12.23 1 24.34 . . +5.2 34 44 36.03 33 Bessel ... 341 7 55 35.52 .130 32.22 7 55 3.43 301 34 36.40 1 35.20 • • 25 0 17.91 34 7 Mars .... S.F. 7 49 38.91 .479 32.36 7 49 7.03 301 52 52.30 1 25.06 5.5 -5.3 34 43 6.57 G. 35 Bessel . . .341 7 55 35.53 + .427 32.38 7 55 3.60 301 34 34.95 -1 26.07 . . +35 0 19.73 36 9 13 43.24 1—1.160 32.37 9 13 9.71 25 13 34.33 + 35.14 —58 39 30.86 37 a Hydras 9 20 51.87 + .033 32.37 9 20 19.53 334 35 13.20 - 35.35 — 81 19.34 38 8 H. C 15412 7 47 29.71 .364 32.50 7 46 57.57 301 58 5.68 1 25.51 5.3 +24 36 48.64 P. 39; Mars .... N.P. 7 49 49.61 .364 32.50 7 49 17.47 301 55 7.18 I 25.67 +5.1 24 39 42.20 40 Bessel ... 341 7 55 36.00 + .369 32.50 7 55 3.87 301 34 37.10 -1 26.81 . . +25 0 18.52 41 9 13 43.37 —1.016 32.50 9 13 9.K 25 13 35.55 f 25.33 f -58 39 32.07 49 a Hydro; .... 9 20 52.23 — .007 32.50 9 20 19.72 334 35 12.20 - 35.56 — 81 17.83 43 9 H. C 15413 7 47 29.74 + .270 32.50 7 46 57.51 301 58 6.75 1 23.57 +4.1 +24 36 46.83 G. 44* Mars .... S.F. 7 50 4.41 +0.270 -32.50 7 49 32.18 301 57 59.75 -1 23.57 -5.1 +24 36 58.93 a Mars N. P., 5th wire, — 0.30 rev. = 4' 5".83. / Mars N. P., south of H. C. 15401, 0.28 rev. = 7".80. b Mars N. P., north of Bessel 341, 4.71 rev. =2' 11".50. g Mars N. P., 4th wire, —6.39 rev. =2' 58".50. c Mars S. F., north of Bessel 341, 0.51 rev. = 14" .20. A Mars S. P., north of H. C. 15412, 0.25 rev. = 7",00. d Mars N. P., south of Bessel 341, 2.43 rev. = 1' 7".86. • This confirms the third observation of February 22, and the e Mara N. P., south of Bessel 341, 6.58 rev. — 3' 3".80. Ephemerifl is presumed Co be in error — 35". 316 MERIDIAN CIRCLE OBSERVATIONS, 1851-52. , 3g Corrections for 1 i 1 ^ Apparent Circle reading, Kefrac- Nadir. jj Observed 1 Date. Object. 'S'g 3 A. R. observed. mean of four tion. microscopes. C apparent declination. i ,0 III Inst. Clock. i i 6 0 o • f. ® 1852. b. m. s. s. s. h. m. s. o / // " ;t « i n In March 9 Greenwich . . 485 It 50 58.47 +0.241 —32.50 8 50 26.21 304 50 34.68 -1 15.26 + 4.1 • • +21 44 10.59 G. Si Bessel ... 275 8 58 49.24 .234 32.50 8 58 16.97 305 28 23.83 ! 1 13.53 • • • • 21 6 19.71 3c Bessel ... 275 9 5 0.69 + .229 32.50 9 4 28.42 305 55 36.65 —1 12.32 • • • • +20 39 5.68 9 13 43.16 — .911 32 50 9 13 9.75 25 12 38.38 + 24.73 . . . . -58 39 33.10 9 20 52.18 + .045 32.50 9 20 19.73 334 35 15.62 ,— 24.99 . , —81 20.62 5 6 10 H.C 15412 7 47 29.81 .545 32.73 7 46 57.63 301 58 5.82 1 24.70 5.2 . . +24 36 47.79 P. Mara .... N.P. 7 50 20.56 .543 32.73 7 49 48.37 302 0 32.72 1 24.56 • • +5.0 24 34 15.75 8 Greenwich . . 485 8 50 58.47 .501 33.74 8 50 26.23 304 50 35.12 1 16.13 • • 21 44 9.92 9 Bessel . . . 275 8 58 49.39 .492 32.74 85817.14 3052833.98 1 14.37 . . • • 21 6 19.30 10 Bessel . . .275 9 4 59.77 .431 32.74 9 4 27.46 305 57 8.23 ' 1 13.14 . . 20 37 33.82 lie Bessel ... 375 9 5 0.81 + .431 32.74 9 4 28.50 j 305 55 38.02 —1 13.15 • • +20 39 4.04 12 9 13 43.66 —1.129 32.74 9 13 9.79 25 12 37.58 ,+ 25.03 t , . . -58 39 33.70 13 9 20 52.30 4. .090 32.74 ! 9 30 19.65 334 35 14.50 i— 25.26 t t — 81 30.33 14 11 Mars .... S.F. 7 50 41.39 .077 32.89 7 50 8.58 302 3 39.88 1 24.63 4.5 —5.0 +24 34 19.36 M. 15 12 Mars .... N.P. 7 51 3.16 .403 32.97 j 7 50 30.59 302 6 35.75 1 23.84 4.4 +4.9 34 28 22.90 P. 16/ Bessel ... 339 7 51 32.52 .348 32.97 7 50 59.90 302 6 27.98 1 23.84 . . . . 24 28 35.57 17 Greenwich . . 485 8 50 58.81 .435 32.97 8 50 26.28 304 50 34.62 1 15.53 4.5 21 44 10.52 18 Bessel . . .275 8 58 49.66 .358 32.97 8 58 17.05 305 28 21.75 1 13.79 . . 21 6 21.65 19 Bessel ... 375 9 5 1.13 + .353 32.98 9 4 28.50 305 55 35.08 -1 12.58 . . . . +20 39 7.11 20 9 13 43.81 —1.051 32.98 9 13 9.79 25 12 38.38 + 24.91 t —58 39 33.68 21 9 20 52.66 4- .011 32.98 9 30 19 69 334 35 13.58 — 25.13 — 81 18.74 83 13 H.C 15401 7 47 9.81 -p .VAi .416 33.12 7 46 37.11 301 50 3.10 1 24.27 4.0 +24 44 51.28 M. 23 Mars .... S.F. 7 51 29.45 .412 33.12 7 50 56.74 303 9 44.50 1 23.21 . . —4.9 24 25 13.72 24* Bessel ... 339 7 51 32.56 .413 33.12 7 50 59.85 302 6 27.39 1 23.39 . . . . 24 28 26.11 25 Bessel ... 341 7 59 57.30 .419 33.12 7 59 24.60 301 42 13.38 1 24.79 3.9 . 24 53 41.63 96 Bessel ... 341 8 6 48.91 .472 33.12 8 6 16.26 301 47 54.78 1 24.48 . . . . 24 46 59.91 27 \ Cancri . . * . 8 12 16.74 .468 33.12 8 11 44.09 303 5 50.20 1 23.55 24 29 3.56 28 A Washington . . . 8 13 42.94 .413 33.12 8 13 10.23 302 5 28.40 1 23.58 t t t t 24T!9 25.39 29 Bessel ... 344 8 28 47.68 .459 33.12 8 28 15.02 302 49 15.52 1 31.18 . . 33 45 35.87 30 Bessel ... 344 8 35 39.93 .449 33.12 8 35 7.26 303 20 19.52 1 19.83 , , . , 23 14 30.52 31 Bessel ... 344 8 40 50.89 .388 33.12 8 40 18.16 303 50 7.68 1 18.38 . . . , 22 44 40.91 32 i Bessel ... 344 8 40 55.41 .387 33.12 8 40 22.68 303 52 44.09 1 18.26 . . . . 32 42 4.38 33 Bessel . . . 378 8 49 27.71 .431 33.12 8 48 55.02 304 39 50.20 1 16.06 , . . . 21 54 56.07 34 Bessel ... 378 9 0 0.81 .425 33.13 8 59 28.11 305 5 24.80 1 14.92 . . . . 31 39 20.25 35 Rumker . . . 3799 9 8 13.59 .414 33.13 9 7 40.87 305 53 35.50 1 12.77 . , . . 20 41 7.48 36 B. A. C. . . . 3181 9 12 51.27 .348 33.13 9 12 18.49 306 51 53.20 1 10.28 • • • • 19 42 47.29 37 14 Mars .... N.P. 7 51 56.29 .394 32.65 7 51 24.03 302 12 48.12 1 33.17 3.5 +4.9 24 22 0.76 G. 38* H.C 15608 753 11.06 .393 32.65 | 7 52 38.80 302 15 55.02 1 33.00 . . 24 18 58.59 39 40 9 3 53.08 9 13 43.59 + .364 —1.349 32.64 32.64 9 3 20.80 9 13 9.60 305 37 24.18 25 12 36.92 — 1 13.61 + 24.88 • • • • +20 57 20.04 58 39 31.19 41 9 20 52.20 4. .038 32.64 9 20 19.52 334 35 14.20 — 25.13 81 18.47 43 15 II. C 15401 7 47 9.10 ~ • .198 32.72 7 46 36.58 301 50 5.32 1 35.31 + 4.8 +24 44 49.30 M. 43 Mars .... S.F. 7 52 27.77 .193 32.72 7 51 55.24 302 16 20.58 1 24.00 t t -4.8 24 18 37.53 44) H.C 15608 7 53 11.04 .139 32.72 7 52 38.51 302 15 56.28 1 24.02 . . 24 18 57.05 45 Bessel ... 341 7 59 56.75 .145 32.72 7 59 24.18 301 42 13.95 1 25.94 . . 34 52 41.30 46 8 12 1G.36 .140 32.72 8 11 43.78 302 5 50.75 1 24 59 24 29 3 15 47m Washington . . . 8 13 42.46 .140 32.72 8 13 9.88 302 5 35.35 1 24.61 24 29 18.57 48 Washington . . . 8 28 4.26 +0.190 —32.72 i 8 27 31.73 302 36 47.28 — 1 23.97 • • • • +23 58 5.00 o Greenwich 483, comparing star, January 8. g Besscl 339, 3d wire, — 2.10 rev. = 3' 17".ll. 6 liessel 375, comparing star, January 2. A Washington, 4th wire, — 0.78 rev. =0' 21". 80. c Bessel 275, comparing star, December 28. t Besscl 344, 3d wire, — 3.56 rev. = 2' 36".41 . d Mars N. P., north of H. C. 15412, 5.35 rev. = 2' 29".41. k H. C. 15608, south of Mars N. P., 6.69 rev. =3' 6" .90. e liessel 275, south of preceding star, 3.23 rev. = 1' 30".21 . 1 H. C. 15608, north of Mars S. F., + 0.87 rev. = 0' 24".30. / Besscl 339, south of Mara N. L., 0.08 rev. = 0' 2".23. n Washington, 4th wire, — 0.55 rev. = 0' 15". 40. AT SANTIAGO DE CHILE. 317 0 .- o ^ I C3 C Corrections for •g I Date. Object. -JL Apparent A.R. Circle reading, Refrac- meau of four tiim. Nadir. i Observed apparent I s ill Inst. Clock. observed. microscopes. declination . i o • c •- - « o 1852. h. m. s. 8. B. h. m. s. o " / // ; /; „ a ° t H i Mar. 15 Besscl ... 344 8 35 39.44 +0.182 —32.72 8 35 6.90 302 20 21.22 —I 20.73 + 4.8 . . +23 14 28.82 H. 9 Bessel ... 344 8 40 50.64 .177 32.72 8 40 18.10 303 50 8.42 1 19.33 . . . . 22 44 40.12 3 Bessel . . .278 8 47 58.83 .171 32.72 8 47 26.28 304 19 33.50 1 17.82 . . 22 15 13.62 4 Bessel . . .278 8 54 19.88 .164 32.72 8 53 47.32 305 0 40.48 1 15.90 . . . . 21 34 4.73 5 Bessel . . .278 9 0 0.31 .164 32.72 8 59 27.75 305 5 27.35 1 15.70 . . 21 29 17.66 6 Rumker . . . 2800 9 8 15.56 .153 32.72 9 7 42.99 306 7 0.58 1 12.93 . . . . 20 27 41.66 7 B. A. C. . . . 3181 9 12 50.70 .092 32.72 9 12 18.07 306 51 53.55 1 11.01 • • 19 42 46.77 8 16 Bessel ... 341 8 6 48.57 .438 32.41 8 6 16.60 301 47 54.58 1 25.34 6.2 t t 24 46 58.67 P. 9 Washington . . . 8 20 19.63 .375 32.41 8 19 47.60 302 25 15.22 1 23.32 . . . . 24 9 36.01 10 Washington • . . 838 4.33 .425 33.41 8 27 32.35 302 36 46.22 1 22.75 . . . . 23 58 4.44 11 Bessel ... 344 8 40 54.90 .ar>3 32.40 8 40 22.85 303 47 33.22 1 19.14 . . 22 47 13.83 12 Bessel ... 378 8 47 58.83 .399 32.40 8 47 26.83 304 19 31.70 1 17.61 . . 22 15 13.82 13 Bessel . . .276 8 54 20.07 .389 32.40 8 53 48.06 305 0 38.72 1 15.65 . . . . 21 34 4.84 14 Bessel . . .277 9 3 52.46 .382 32.40 9 3 20.44 305 33 0.40 1 14.17 . . . 21 1 41.68 15 Washington . . . 9 8 47.23 + .316 32.40 9 8 15.15 306 19 9.88 — 1 12.11 . . . . +20 15 30.14 16 t Argus ..... 9 13 43.31 — 1.2:16 32.40 9 13 9.67 25 12 37.85 I-I. 25.01 —58 39 34.95 17 9 20 52.10 — .018 32.40 9 20 19.52 334 35 13.60 — 25 24 — 81 20.45 18 18 Bessel ... 341 8 6 48.34 + .374 32.53 8 6 16.18 301 47 55.98 — 1 2^72 5.8 t f +24 47 0.05 P. 19 Bessel ... 344 8 16 40.94 .423 32.53 8 16 8.83 302 9 50.92 1 26.49 . . . . 24 35 3.88 30 H. C 17513 8 46 0.63 .398 32.53 8 45 28.50 303 43 12.90 1 21.65 . . 22 51 37.06 21 Bessel . . . 378 8 52 45.82 .331 32.53 8 52 13.62 304 32 20.20 1 19.25 . . . . 22 2 27.36 22 Bessel . . .275 8 58 49.23 .370 32.53 8 58 17.07 305 28 24.90 1 16.56 . . . . 21 6 19.97 23 Bessel . . .275 9 5 0.46 + .363 32.53 9 4 28.29 305 55 37.15 — 1 15.30 . . +20 39 6.46 24 9 13 43.39 —1.318 32.53 9 13 9.54 25 12 37.52 + 25.78 ( —58 39 34.99 25 it Hyclrffi ..... 9 20 52.16 — .049 32.53 9 20 19.58 334 35 14.25 — 26.01 — 81 19.93 26 19 H. C 15608 7 53 10.83 + .379 32.69 7 52 38.52 302 15 57.00 1 24.79 4.1 +24 18 57.80 M. 27 Bessel ... 341 8 6 48.59 .331 32.70 8 6 16.22 301 47 57.80 1 26.49 . . . . 24 46 58.70 28 Washington . . . 8 28 35.71 .370 32.70 828 3.38 303 0 37.92 1 22.73 . . . . 23 34 14.82 29 Bessel . . .278 8 44 48.16 .302 32.70 8 44 15.76 304 1 17.38 1 19.87 . . . . 22 33 32.50 30 Bessel ... 278 8 50 58.33 .345 32.70 8 50 25.98 304 50 36.30 1 17.46 . . . . 21 44 11.17 31 H. C 18132 9 4 49.41 + .338 32.71 9 4 17.04 305 17 57.92 — 1 16.17 . . . . +21 16 48.26 32 i Argus 9 13 43.20 —1.157 32.71 9 13 9.33 25 12 42.10 + 25.47 — 58 39 37.56 33 20 Washington . . . 8 28 35.89 + .383 33.95 838 3.32 303 0 35.90 — 21.72 3.9 +23 34 16.03 P. 34 H. C 17513 8 46 0.61 .425 32.% 8 45 28.08 303 43 14.40 19.56 . . . . 22 51 35.37 35 Bessel . . .378 8 52 46.30 .358 32.96 8 52 13.70 304 32 20.00 17.12 . . . . 22 2 27.33 36 Bessel . . .275 8 58 49.53 .398 33.96 8 58 16.97 305 28 23.38 14.50 . . 21 6 21.33 37 Bessel ... 375 9 5 0.87 .390 32.96 9 428.30 305 55 36.88 13.27 . . . . 20 39 6.60 38 Bessel . . .275 9 10 54.86 + .387 32.96 9 10 22.23 306 32 20.00 — 11.82 . . . . +20 2 22.03 39 9 13 43.75 —1.370 32.% 9 13 9.42 25 12 40.65 + 25.11 f —58 39 35.55 40 9 20 52.47 + .017 32.96 9 20 19.49 334 35 14.35 — 25.33 — 81 18.81 41 22 Washington . . . 8 20 20.05 .341 33.32 8 19 47.17 302 25 11.38 1 23.08 5.5 +24 9 40.31 P. 42 Washington . , 8 28 36.03 .332 33.22 8 28 3.14 303 034.18 1 21.31 . . . . 23 34 15.74 43 Bessel . . .278 8 47 59.31 .366 33.22 8 47 26.46 304 19 31.82 1 17.51 . . . . 23 15 14.30 44 H. C 18132 9 4 49.80 + .ar>i 33.22 9 4 16.93 305 17 53.90 — 1 14.76 . . . . +21 16 49.47 45 9 13 43.84 —1.320 33.22 9 13 9.30 25 12 40.18 + 24.98 —58 39 36.55 46 a Hydra 9 20 52.70 — .065 33.22 9 20 19.41 334 35 15.35 — 25.25 — 8 1 21.39 47 23 Bcssel ... 339 7 51 32.68 +0.451 -33.41 7 50 59.72 302 6 26.60 — 1 24.33 + 5.1 +24 28 26.74 M. 318 MERIDIAN CIRCLE OBSERVATIONS, 1851-52. i 11 Corrections for 1 Date. Object. f I 111 Apparent A. R. observed. Circle reading, mean of four microscopes. Refrac- tion. Nadir. a Observed apparent declination. 1 i £ S« i> Inst. Clock. S S • d J'S'5 5 M O i 0 1852. h. m. s. s. s. h. m. s. o / // , „ ii a • / // j Mar. 23 Washington .... 8 21 28.44 +0.444 -33.41 8 20 55.47 302 29 17.42 — 1 23.36 + 5.1 +24 5 34.95 M. 2 Washington .... 8 30 44.88 .433 33.41 8 30 11.90 303 10 28.52 1 21.28 23 24 21.77 3 Bessel ... 278 8 44 48.48 .471 33.41 8 44 15.54 304 1 12.80 1 18.83 24 33 35.04 4 Bessel ... 275 9 5 0.28 .386 33.41 9 4 27.26 305 57 5.05 1 13.43 • • 20 37 37.39 5a Bessel ... 275 9 5 1.21 + .386 33.41 9 4 28.19 305 55 33.75 — 1 13.50 • • • • +20 39 8.76 • 9 13 44.09 —1.493 33.41 9 13 9.19 25 12 40.08 + 25.14 —58 3936.21 7 25 Bessel ... 341 7 55 48.73 + .538 33.25 7 55 16.02 301 39 43.35 — 1 25.43 5.0 +24 55 11.19 M. 8 Washington .... 8 20 20.28 .532 33.25 8 19 47.56 302 25 11.82 1 23.15 • • • • 24 9 40.44 9 Washington .... 8 30 44.64 .580 33.25 8 30 11.97 303 10 30.58 1 20.78 • • • • 23 24 19.31 10 Bessel ... 278 8 44 1.08 .517 33.25 8 43 28.35 304 1 16.70 1 18.39 . . • • 22 33 30.80 iii Bessel ... 278 8 44 48.44 .517 33.25 8 44 15.71 304 1 18.40 1 18.39 • • • • 22 33 29.10 13 e Bessel ... 278 8 46 31.24 .515 33.25 8 45 58.51 304 12 7.12 1 17.86 • • • • 22 22 39.85 13 a Bessel ... 275 9 5 0.14 .501 33.25 9 4 27.39 305 57 5.45 1 13.13 . . 20 37 36.79 14 d Bessel ... 275 9 5 1.26 .501 33.25 9 4 28.51 305 55 35.25 1 13.19 • • 20 39 7.05 15* 26 Washington .... 8 21 27.65 .609 33.26 8 20 55.00 302 29 26.00 1 22.40 4.9 . . 24 5 25.61 P. 16 Washington .... 8 32 13.96 .599 33.26 8 31 41.30 303 18 35.82 1 19.87 23 16 13.26 17 Bessel ... 278 8 47 59.22 .643 33.26 8 47 26.60 304 19 32.98 1 16.83 22 15 13.06 18 Washington . , . f 9 8 47.93 + .568 33.26 9 8 15.24 306 19 8.25 — 1 11.39 • • • • +20 15 32.35 19 9 13 43.07 — .541 33.26 9 13 9.27 25 12 40.85 + 24.80 , t —58 39 36.44 20 9 20 52.38 + .346 33.26 9 20 19.47 334 35 14.28 — 25.02 t t — 81 20.05 21 27 Washington .... 8 20 22.76 .673 33.38 8 19 50.05 302 15 1.05 1 23.66 13.1 , , +24 19 43.62 M. 22 Washington .... 8 30 44.80 .663 33.38 8 30 12.08 303 10 21.88 1 20.77 . . 23 24 19.90 23 e Washington .... 8 32 13.70 .661 33.38 8 31 40.98 303 18 33.12 1 20.35 • • 23 16 8.24 24 Bessel ... 278 8 46 31.21 .651 33.38 8 45 58.48 304 11 56.25 1 17.77 . . 22 22 42.53 25 Washington .... 9 8 47.67 .626 33.38 9 8 14.92 306 19 1.22 1 11.99 • • • • 20 15 31.78 96 29 H.C 16393 8 15 18.11 .674 33.21 8 14 45.57 302 34 25.00 1 22.38 8.9 . . 24 0 22.59 ! M. 27 Washington .... 8 20 22.36 .679 33.21 8 19 49.83 302 15 6.70 1 23.42 . . 24 19 41.93 28 Washington .... 8 32 13.56 .720 33.21 8 31 41.07 303 18 33.62 1 20.16 . . 23 16 11.75 29 Washington .... 9 8 47.67 .627 33.21 9 8 15.09 306 19 4.32 1 11.78 • • * • 20 15 32.67 30 30 Bessel ... 275 9 8 47.13 + .664 32 97 9 8 14.82 306 42 26.05 -1 10.75 8.8 . . +19 52 10.01 P. 31 9 13 42.79 — .621 32.97 9 13 9.20 25 12 38.72 + 24.88 —58 39 38.29 32 a Hydras 9 20 52.09 + .335 32.97 9 20 19.46 334 35 10.45 — 25.11 — 8 1 20.03 33 31 H. C 16464 8 17 8.57 .676 33.40 8 16 35.85 302 33 13.02 1 18.50 8.3 +24 1 31.29 M. 34 Bessel ... 275 9 8 47.44 .638 33.41 9 8 14.67 306 42 26.15 1 10.15 - • 19 52 9.81 35 April 2 Bessel ... 278 8 48 5.98 .934 33.84 8 47 33.07 304 25 59.75 1 18.23 7.7 . . 22 8 44.89 M. 36 Bessel ... 275 9 7 59.09 .897 33.85 9 7 26.14 306 43 8.02 1 11.88 19 51 30.27 37 6 Washington .... 8 2021.29 .532 35.15 8 19 48.67 302 25 6.00 1 23.28 8.2 . . 24 9 43.19 M. 38 Bessel ... 278 8 48 7.30 .566 35.16 8 47 32.71 304 25 55.35 1 17.15 . . +22 8 47.71 39 9 20 54.07 .314 35.17 9 20 19.21 334 35 10.50 25.22 ( — 8 1 19.37 40 8 Washington .... 8 20 24.91 .523 35.68 8 19 49 75 302 15 5.90 1 23.37 + 8.0 +24 19 43.58 M. 41 9 20 54.66 +0.297 —35.69 9 20 19.27 334 35 11.20 — 25.13 ( — 8 1 19.96 a Bessel 275, 4th wire, — 3.27 rev. = 1' 31".30. t Bessel 278, 4th wire, + 0.14 rev. = 1".70. a As there are two stars in the field differing in A. R. almost accu- c Bessel 278, 6th wire, + 5.13 rev. — 10' 48". 72. rately If., it is supposed that the A. R. of the preceding was ob- A Bessel 275, 4th wire, — 3.23 rev. = 1' 30".20. served while the declination of the following one was measured. e Washington, 6th wire, — 0.51 rev. — & 1V.24. I have transposed the circle readings to make the results conform * Mr. Phelps observed this star on only one wire. It is reduced on with the observations on pages 316 and 317. the supposition that it was B. J. M. G. INFERIOR CONJUNCTION OF VENUS, 1850-51. MERIDIAN CIRCLE OBSERVATIONS. i 1! Corrections for Apparent A. R. observed. i & Date. Object. ill Circle reading, mean of four microscopes. Refrac- tion. Nadir. i Observed, apparent declination. S 41 d *•! * last. Clock. 1 1 0 " ° ° 0 1850. h. in. s. g 9. h m. s. 0 n » 1 Oct. 19 o Scorpii . . . 16 20 31.90 +0.109 —18.025 16 20 13.98 352 39 21.05 — 0 6.72 — 2.92 . . -26 5 37.30 G. 9 a Tri. Aust. . . 16 33 8.44 .682 18.007 16 32 51.11 35 17 44.40 + 36.88 68 44 44.25 3 Venus . . N.L. 16 39 49.14 .113 17.997 16 39 31.25 353 3 53.68 — 6.34 + 14.4 26 30 24.71 4 20 a Scorpii . . . 16 20 29.99 .129 16.164 16 20 13.96 352 39 22.90 — 6.72 5.18 . . 36 5 36.89 G. 5 a Tri. Aust. . . 16 33 6.47 .721 16.146 16 32 51.04 35 17 45.60 + 36.92 . . 68 44 43.23 6 Venus . . N.L. 16 43 37.01 .131 16.131 16 43 21.01 353 13 25.30 — 6.20 . . 14.6 26 39 54.41 7 21 a Scorpii . . . 16 20 28.07 .096 14.241 16 20 13.93 352 39 23.90 — 6.72 6.47 . . 26 5 36.60 G. 8 a Tri. Aust. . . 16 33 4.44 .721 14.224 16 32 50.94 33 17 45.62 + 36.89 . . . . 68 44 41.93 1 Venus . . N.L. J6 47 22.63 .132 14.204 16 47 8.56 353 22 23.55 — 6.06 14.8 36 48 51.71 10a 22 a Tri. Aust. . . 16 33 2.93 .615 11.931 16 32 51.62 35 17 45.87 + 37.26 6.57 , . 68 44 42.45 G. 11 Venus . . N.L. 16 51 6.10 .080 11.906 16 50 54.27 353 30 46.85 — 5.99 • • 14.9 26 57 15.08 12 23 a Scorpii . . . 16 20 23.97 .177 10.130 16 20 14.02 352 39 24.12 — 6.75 6.52 26 5 36.74 G. 13 a Tri. Aust. . . 16 33 0.97 .190 10.114 ; 16 32 51.05 35 17 45.92 + 37.07 . . . . 68 44 42.36 14 Venus . . N.L. 16 54 46.58 + .176 10.085 16 54 36,67 353 38 39.00 — 5.83 15.1 27 5 7.64 15 24 a Scorpii . . . 16 20 22.07 - .067 8.098 16 20 13.90 352 39 19.95 — 6.78 3.75 26 5 36.31 G. 16 a Tri. Aust. . . 16 32 59.86 .815 8.081 16 32 50.96 35 17 41.75 + 37.22 . . 68 44 42.11 17 Venus . . N.L. 16 58 23.14 .068 8.045 16 58 15.02 353 45 54.17 — 5.75 • • 15.3 27 12 26.86 18 i 25 a Scorpii . . . 16 20 20.08 .080 6.129 16 20 13.87 352 39 19.30 — 6.71 3.08 26 5 35.40 G. 19 a Tri. Aust. . . 16 32 57.77 .931 6.110 16 32 50.73 35 17 42.92 + 36.81 . . 68 44 42.54 20 Venus . . N.L. 17 1 59.64 .093 6.066 17 1 53.48 353 52 36.75 — 5.58 • • 15.6 27 19 9.58 21 26 a Scorpii . . . 16 20 17.76 .058 3.805 : 16 20 13.39 352 39 20.25 — 6.69 3.45 36 5 37.00 G. 22 a Tri. Aust. . . 16 32 55.61 .886 3.784 16 32 50.94 35 17 42.82 + 36.75 . . 68 44 43.01 23 Venus . . N.L. 17 5 31.36 .072 3.730 17 .5 27.56 353 58 48.42 — 5.48 • • 15.9 27 25 22.28 34 27 a Scorpii . . 16 20 15.41 .101 1.483 16 20 13.83 352 39 22.65 — 6.79 4.60 t , 26 5 37.15 G. 25 a Tri. Aust. . . 16 33 53.64 1.416 1.462 16 32 50.76 35 17 41.72 + 37.30 . . 68 44 40.31 26 Venus . . N.L. 17 8 59.47 .123 — 1.402 17 8 57.95 354 4 28.23 — 5.47 • • 16.2 27 31 0.24 27 28 a Scorpii . . . 16 20 13.04 .135 + 0.945 16 20 13.86 352 39 21.65 — 6.83 4.42 . . 36 5 36.29 G. 28 a Tri. Aust. . . 16 32 51.20 1.416 0.966 If 32 50.75 35 17 41.60 + 37.47 . . 68 44 40.54 29 Venus . . N.L. 17 12 24.09 .124 1.033 17 12 24.89 354 9 35.68 — 5.42 16.4 27 36 8.13 30 c 30 a Scorpii . . . 16 20 8.11 .079 5.807 162013.84 3SB3921.57— 6.79 - 4.60 26 5 36.07 G. 31 a Tri. Aust. . . 16 32 46.37 1.371 5.830 16 32 50.83 35 17 41.35 + 37.27 . . 68 44 39.91 32 Venus . . N.L. 17 19 2.66 -0.003 + 5.956 17 19 8.62 354 18 8.00 —0 5.26 + 16.8 -27 44 40.83 a Passing cirri prevented a Scorpii being seen. c a Scorpii extremely unsteady. i The screw moving the wires in collimation was turned last night to reduce the error. 320 MERIDIAN CIRCLE OBSERVATIONS, 1850-51. __ — ts • ~ a 5 £ Corrections for I £ e e Apparent Circle reading, Refrac- Nadir. b Observed I Date. Object. III A. R. observed. mean of four microscopes. tion. •a e apparent declinatian. | | 11* Inst. Clock. B 1 & 11* 6 0 1850. b. m. s. s. s. h. m. s. 0 / // // // n « // // i Oct. 31 aScorpii . . . 16 20 5.39 -0.090 + 8.659 16 20 13.96 352 39 22.60 — 6.67 — 5.32 —26 5 36.50 G. 2 a Tri. Aust. . . 16 32 43.56 1.393 8.686 16 32 50.86 35 17 43.42 + 36.61 . . • • 68 44 40.60 3a Venus . . N.L. 17 22 15.60 .116 8.787 17 2224.27 354 21 40.90 - 5.11 . . + 17.1 27 48 13.46 4 Nov. 1 a Scorpii . . . 16 20 2.43 .130 11.738 16 20 14.04 352 39 22.45 — 6.69 4.35 . . 26 5 37.30 6. 5 a Tri. Aust. . . 16 32 40.91 1.755 11.665 16 32 50.82 35 17 45.20 + 36.71 ! . . . . 68 44 43.45 6 11 Ophiuchi . . . 17 1 36.00 -f .047 j 11.726 17 1 47.78 342 5 53.63 — 16.76 . • • • 15 31 58.41 7 Venus . . N.L. 17 25 23.94 - .163 1 11.776 17 25 35.56 354 24 41.15 5.08 • • 17.3 27 51 14.91 •t 2 a Scorpii . . . 16 19 59.31 .160 14.698 16 20 13.85 352 39 25.68 - 6.69 8.89 26 5 35.99 G. 9 a Tri. Aust. . . 16 32 38.23 2.230 1 16** 14.725 14 810 16 17 32 50.73 19 SI 70 35 17 46.18 + 36.74 • • • • 68 44 39.92 10 11 ; >' Arffi .... Venus . . N.L. 17 12 38.05 17 28 27.67 .170 14.843 17 28 42.34 354 27 8.48 — 5.03 • • + 17.6 27 53 38.05 13 4 a Tri. Aust. . . 16 32 32.21 2.246 20.847 16 32 50.81 35 17 45.50 + 36.71 8.38 68 44 39.72 P. 13 7i Ophiuchi . . . 17 1 26.68 .045 20.906 17 1 47.54 342 5 57.28 — 16.86 • • . . 15 31 57.93 14 /JAra . . . . 17 12 32.07 1.174 Qfil 20.929 9(1 Odd 17 17 12 5J.83 20 16.42 21 56 12.68 + 21.02 • • • • 55 22 51.21 15 16 c a Are .... Venus . . S.L. 17 19 56.44 17 34 21.11 t9n .272 .ju.yii 20.973 17 34 41.81 354 31 10.75 — 5.01 — 18.2 27 51 5.05 17 5 a ScorpU . . . 16 19 50.21 .193 23.680 16 20 13.70 352 39 21.23 — 6.69 7.75 . . 26 5 32.68 G. 18 a Tri. Aust. . . 16 32 28.73 —1.860 23.704 16 32 50.57 35 17 43.03 + 36.72 . . . . 68 44 37.89 19 ij Ophiuchi . . . 17 1 23.25 + .025 23.760 17 1 47.04 342 5 53.55 — 16.77 . . . . 15 31 54.92 20 Venus . . N.L. 17 37 9.84 - .195 23.828 17 37 33.47 354 31 23.40 4.97 • • + 18.5 27 57 55.07 21 7 a ScorpU . . . 16 19 44.96 .076 28.919 16 20 13.80 352 39 22.23 — 6.70 5.68 . . 26 5 35.74 G. 22 a Tri. Aust, . . 16 32 23.33 —1.692 28.941 16 32 50.58 35 17 41.95 + 38.79 . . 68 44 38.95 33 ri Ophiuchi . . . 17 1 18.46 + .099 28.991 17 1 47.55 342 5 52.68 — 16.79 . . 15 31 56.10 34 Venus . . N.L. 17 42 31.89 — .110 +29.062 17 43 0.84 354 31 44.93 4.98 • • 19.0 27 58 19.16 25 •8 a ScorpU . . . 16 20 44.10 .065 —30.047 16 20 13.99 352 39 22.53 — 6.72 6.05 . 26 5 35.65 G. 96 a Tri. Aust. . . 16 33 22.46 —1.669 30.052 16 32 50.74 35 17 40.88 + 36.92 . . 68 44 37.64 27 il Ophiuchi . . . 17 2 17.71 + .109 30.065 17 1 47.75 342 5 57.28 — 16.85 . . . . 15 32 0.27 28 Venus . . N.L. 17 46 5.69 — .099 30.084 17 45 35.51 354 31 11.68 5.00 • • 19.3 27 57 45.82 Mi 10 a ScorpU . . . 16 20 45.16 .120 31.452 16 20 13.59 352 39 24.65 — 6.78 7.73 26 536.03 G. 30 a Tri. Aust. . . 16 33 24.09 —1.564 31.456 16 32 51.07 35 17 40.15 + 37.25 . . . . 68 44 35.56 31 TI Ophiuchi . . . 17 2 18.94 + .036 31.466 17 1 47.51 342 5 55.18 — 17.01 . . 15 31 56.33 33 Venus . . N.L. 17 50 56.94 — .150 31.482 17 50 25.31 354 28 36.78 5.09 . . 20.0 27 55 9.85 33 /»' Sagittarii . . 18 5 20.29 — .076 31.487 18 4 46.73 347 39 22.70 11.52 • • • • 21 5 29.34 34 e 11 >,' Ophiuchi . . . 17 2 19.29 + .063 31.945 17 1 47.40 342 5 54.95 — 16.87 7.48 . . 15 31 56.49 G. 35 a Ar» .... 17 20 48.86 — .643 31.936 17 20 16.28 16 18 26.08 + 15.28 , . . . —49 44 59.77 36 a Ophiuchi . . . 17 28 30.26 + .492 31.933 17 27 58.82 313 54 1.88 — 54.22 . . . . +12 40 33.93 37 Venus . . N.L. 17 53 12.21 — .140 31.922 17 52 40.15 354 26 37.23 5.08 • • 20.3 —27 53 10.86 38/ 13 a ScorpU . . . 16 20 44.54 .066 30.687 16 20 13.79 352 39 25.73 — 6.75 10.05 26 5 34.82 G. 39 a Tri. Aust. . . 16 33 23.67 2.958 30.680 16 32 50.03 35 17 41.60 + 37.10 . . . . 68 44 34.54 40 a Are .... 17 20 48.02 1.019 30.652 16 20 16.35 16 18 26.95 + 15.34 . . . . 49 44 58.13 41 Venus . . N.L. 17 57 18.57 .087 30.632 17 56 47.85 354 21 9.33 — 5.18 • • + 21.0 27 47 40.99 43 14 aScorpii . . . 16 20 43.83 .114 29.736 16 20 13.98 352 39 26.20 — 6.53 —11.88 . . 26 5 33.68 G. 43 a Tri. Anst. . . 16 33 22.41 -4.148 29.726 16 32 50.54 35 17 45.58 + 35.88 . . . . 68 44 35.47 44 H Ophiuchi . . . 17 2 17.01 +0.105 —29.705 17 1 47.41 342 5 57.38 — 16.38 • • • • —15 31 55.01 a This is the best observation yet made of the planet. e a Scorpii and o TrianguH Australia not seen by reason of clouds. b Light cirri orer all the heavens. / The observations of a Scorpii and a TrianguH Australia are not c Recorded N.L., but the discordance with ephemcris induces me reliable in declination, both objects being rather like flaring to believe the S.L. was really observed, and it is reduced accord- mops than stars, and very unsteady. ingly- J. M. G. * At 2A. 20m. shortened clock pendulum and advanced hand one i a Scorpii wan eicecdingly unsteady, a Ane was seen but too minute. dimly to measure ; it certainly is not so bright as 0. a Opbiuchi obscured by clouds, through which Venus also was seen. Wires D, F, G of /i> Sagiuarii occulted by horizontal wire. AT SANTIAGO UK C1IILK. 32] No. for reference. Date. Object. ~ o II J C *' i:i.rrcc!ioii> !oi hist. Clock. Apparent A. K. observed. Circle ri-;lilii|._'. mi'aii Hi'inur micro Retrac- Xadir. lion. Corr'n for scum!. ( Hwerved ipmrcnt ili-clination. Observer. 1850. b. ni. s. s. s. b. in. s 0 / // i n ,, n ° i it 1 Nov. 14 a Araj .... 17 20 46.84 —0.805 -29.691 17 20 1C. 3.', 16 1^ -0 14.83 —11.88 —49 44 56.37 G. 2 Venus . . N.L. 17 59 10.03 .151 29.661 1 7 58 40.22 351 17 47.20 8.08 . . j-'JI.I 27 44 17.55 3a 15 a Scorpii 16 20 42.73 .i::.' 28.587 16 20 13.95 353 39 27.63 — 6.67 10.85 . . 26 5 36.00 G. 4 a Tri. Aus(. . . 16 33 21.60 —2.306 38.578 16 32 50.72 35 17 44.58 + 36.37 . . i 68 44 35. £9 5 17 Ophiuchi . . . 17 2 16.06 + .036 38.559 17 1 47.54 342 5 58.33 — 1661 . . 15 31 56.78 6 a Arre .... 17 21 46.07 — .908 28.546 17 21 16. 6S 16 18 29.53 + 15.04 . . . . 49 44 59.61 7 Venus . . N.L. 18 0 53.30 .229 28.519 18 0 24.55 334 13 58.10 — 5 19 • • 21.7 27 40 29.65 8 16 a Scorpii . . 16 20 41.59 .163 27.721 16 20 13.71 333 39 25 95 — 6.59" 10.73 . . 26 5 34.52 G. 9 a Tri. Aust. . . 16 33 20.80 —2.790 27.712 18 32 50.30 35 17 44.58 + 36.19 . . . . 68 44 35.93 10 1 Ophiuchi . . . 17 2 14.96 + .118 27.691 17 1 47.39 343 5 58.63 — 16.52 . . 15 31 57.27 11 a Ara; .... 17 21 41.87 —1.049 27.678 17 21 16.14 16 18 28.15 + 14.96 . . . . 49 44 58.27 13 Venus . . N.L. 18 2 28.07 .305 27.649 18 2 0.22 351 9 35.90 — 5.23 • • 22.1 37 36 7.93 136 17 a Scorpii . . . 16 20 40.66 .239 26.554 16 20 13.87 352 39 28.95 - 6.78 13.58 . . 26 5 33.48 G. 14 a Tri. Aust. . . 16 33 30.27 —2.948 26.543 16 32 50.78 35 17 45 10 + 37.18 . . . . 68 44 34.59 15 17 Ophiuchi . . . 17 3 13.68 + .049 36.517 17 1 47.21 342 6 0.35 — 17.05 . . . . 15 31 55.61 16 a Arre . . . 17 21 44.01 —1.153 26.500 1 7 21 16.. '16 16 18 28.55 4- 15.44 49 44 55.30 17 Venus . . N.L. 18 3 54.03 — .281 26.462 18 3 27.29 354 4 48.30 — 5.48 • • 33.4 27 31 17.53 18 c 18 a Scorpii . . . 16 20 38.79 + .203 25.167 16 20 13.82 352 39 28.98 — 6.63 15.18 21! 5 33.06 G. 19 a Tri. Aust. . . 16 33 17.79 —2.053 25.154 16 32 50.58 35 17 45.83 + 36.23 . . 68 44 32.77 20 tj Ophiuebi ... . 17 2 12.16 + .444 25.120 17 1 47.47 342 6 0.63 — 16.54 15 31 54.80 21 a Arffi .... 17 21 41.98 — .606 35.107 17 21 16.27 16 18 29.88 + 14.98 . . . . 49 44 55.57 22 Venus . . N.L. 18 5 10.31 + .169 25.004 18 4 45.42 353 59 31.23 — 5.39 23.8 27 25 59.35 33d 19 a Scorpii . . . 16 20 37.46 + .197 23.708 16 20 13.95 352 39 29.35 — 6.55 14.10 36 5 34.59 G. 24 a Tri. Aust. . . 16 33 16.87 —3 643 23.695 16 32 50.53 35 17 46.85 + 35.93 . . . . —68 44 34.57 35 a Ophiuchi . . 17 28 21.11 +1.330 23.639 17 27 58.70 31354 6.80 — 52.71 . . +12 40 34.12 36 Venus . . N.L. 18 6 17.90 .158 23.601 18 5 54.46 353 53 52.43 5.43 23.2 -27 20 21.99 27 e 30 a Scorpii . . 16 20 35.30 + .117 21.059 16 20 14.26 352 39 32.55 — 6.69 16.45 26 5 35.30 G. 38 a Tri. Aust. . . 16 33 15.16 —3.093 21.048 16 33 51.02 35 17 49.58 + 36.73 . . . . 68 44 35.75 39 /JAra . . . . 17 13 14.35 —1.371 [ 21.014 17 12 51.97 21 56 15.60 + 20.90 . . . . 55 22 45.94 30 Venus . . N.L. 18 7 14.73 + .113 20 968 18 6 53.87 353 47 44.15 — 5.65 • • 23.6 27 14 11.54 31 31 a Scorpii . . . 16 20 34.01 + .210 30.020 16 20 14.30 352 39 29.78 - 6.66 13.45 . . ' 26 5 35 56 G. 33 a Tri. Aust. . . 16 33 13.79 —3.097 20.009 16 32 50.68 35 17 46.15 + 38.53 . . 68 44 35.12 33 rt Ophiuchi . . 17 2 7.01 + .595 19.984 17 1 47.63 342 6 2.80 - 16.68 . . . . 15 31 57.55 34 a Anc .... 17 21 37.39 — .925 19.968 17 21 16.50 16 18 29.53 + 15.10 . . . . 49 44 57.07 35 Venus . . N.L. 18 8 3.17 + .207 19.928 18 7 43.45 353 41 5.13 — 5.72 +24.0 —27 7 35.83 36/ 33 @ Ophiuchi 17 36 21.38 1.027 17.822 17 36 4.59 321 56 13.98 40.84 14.15 + 4 38 15.12 M. 37 Venus . . S.L. 18 9 10.01 .162 17.792 18 8 52.38 353 27 17.13 5.99 , . —94.7 —26 52 58.18 38 a Lyra; .... 18 32 7.07 +2.162 17.772 18 31 51.46 287 57 18.40 —2 39.22 . . +38 39 9.08 39 26 o Tri. Aust. . . 16 33 6.84 -3. 174 j 14.030 16 32 50.64 35 17 42.22 + 26.25 -14.73 . . —68 41 29.63 G. 40 rj Ophiuchi . . . 17 2 1.03 f. .497 14.011 17 1 47.52 342 6 1. 10 — 16.55 . . 15 31 55.71 41 0 Ara .... 17 13 6.43 - .885 14.004 17 12 51.54 21 56 13.43 + 20.63 . . —55 22 45.22 42 a Ophmelii . . . 17 28 11.66 +1.127 13994 17 27 58.80 313 54 7.28 — 53.18 . . . . +12 40 34.74 43 Venus . . N.L. 18 9 31.70 .231 13.967 18 9 17.96 353 I 0.80 6.28 . . +26.0 -35 27 31.68 44 a Lyiie .... 18 32 3.69 LI. 880 —13.952 18 31 51. e>2 287 57 18.45 —2 38.35 • • • • +38 39 8.74 a Venus wag seen through cirri, anil the contact with the hori- t Cirri all the time. Declination of a Scorpii on last wire. Tran- zontal wire is doubtful. sits of a Scorpii and a Trianguli Anstralis observed at only one b After the observations, let down the cast ,>nd of the axis. wire. Microscopes H, C, and 1) were niovt d helore observa- r The star being faint, the observation of a Arm is not very pood. tions. d Constantly passing cirri, anil declinations uncertain. Heavy /Objects very iln-l'';"h '. earthquakes at 1. a Serena both before and after Hie olxerrn lions of the Venus surs. n 322 MERIDIAN CIRCLE OBSERVATIONS, 1850-51, 8 .- c e o Corrections for Apparent A. R. ii »crvi-il. f £ 5 Jirrlc reading. Refrac- Nadir. Observed 1 Date. Object. if C • — mean nf loin tion. & a apparent decliimtiun. E £ hut. Clock. £ s o Z jib 6 £ O 1850. h. m. 8. s. 8. l m. s. . , // / // ,. it 0 / /' la Nov. 27 a Tri. Aust. . . 16 33 5.^6 -2.303 -12.796 16 32 50.66 35 17 44.15 +0 36.85 -13.90 -68 44 32.99 a. 2 >i Ophiuchi . . . 17 2 0.01 + .335 12.774 17 1 47.58 342 6 2.73 — 16.82 • • • • 15 31 57.90 3 j ft Aras .... 17 13 5 44 — 1 .031 12.765 17 12 51 .04 21 56 14.35 + 20.97 —55 22 47.31 4 a Onhiuchi . . . 17 28 10.60 + .955 12.754 1- 27 58.81 313 54 9.38 — 54.05 + 12 40 32.68 5 Venus . . N.L. 18 9 17.80 .074 12.722 18 9 5.15 352 51 33.05 6.52 +26.4 —26 18 4.92 6 a Lyras .... 18 33 2.21 +1.700 12.705 18 31 51.20 287 57 20.38 —2 38.92 +38 39 6.55 75 28 /? Arns .... 17 13 4.43 —1.198 11.824 17 12 51.41 21 56 9.80 + 31.07 11.48 —55 22 45.28 G. 8 a Ophiuchi . . . 17 28 9.45 +1.091 11.810 17 27 58.73 313 54 7.65 — 54.30 • • +12 40 33.24 9 Venus . . N.L. 18 8 53.67 .102 11.7^9 18 8 40.99 352 41 38.45 6.73 26.8 —26 8 12.94 10 a Lyras .... 1833 1.16 +2.200 11.764 18 31 51.59 287 57 18.68 -2 39.65 • • +38 39 6.56 lie 30 a Tri. Aust. . . 16 33 3.51 —2.340 10.924 16 32 50.25 35 17 47.50 + 37.05 17.85 . . —68 44 32.r.9 G. 12 i] Ophiuchi . . . 17 1 58.21 + .312 10.913 17 1 47.61 342 6 6.10 — IB. 91 • • 15 31 57.23 13 Venus . . N.I.. 18 6 32.55 .039 10.889 18 621.70 352 20 24.73 7.04 27.6 —25 46 53.33 14 a Lyras .... 18 32 0.70 +1.647 10.879 18 31 51.47 287 57 28.58 2 39.67 +38 39 3.05 15 Dec. 2 a Tri. Aust. . . 16 33 2.55 —2.372 9.703 16 32 50.48 17.53 G. 16 Venus . . N.L. 18 5 28.57 + .068 9.659 18 5 18.98 351 57 6.48 7.36 28.4 —25 23 35.88 17 a Lyras .... 18 31 59.47 +1.643 9.646 18 31 51.47 287 57 27.18 —2 38.74 +38 39 3.20 Ui 4 a Tri. Aust. . . 1633 1.21 -2.251 8.436 16 32 50.52 35 17 47.10 + 30.93 18.15 . . —68 44 31 .77 G. 19 0 Arts .... 17 13 0.88 — .953 8.418 r 12 51.51 21 56 16.88 + 21.02 55 22 45.64 20 Venus . . N.L. 18 2 43.73 + .136 8.397 18 2 35.47 351 31 51.50 — 7.77 . . 29.1 —24 58 20.57 21 a Lyrrc .... 18 31 57.96 + 1.664 8.384 18 31 51.24 287 57 27.60 -2 39.26 • • +38 39 4.92 22 1 S a Tri. Aust. . . 16 33 0.73 -2.1S3 7.815 16 32 50.79 35 17 45.98 + 36.74 18.18 —68 44 30.43 G. 23 0 ATX . . . . 17 13 0.43 — .920 7.797 17 12 51.71 21 56 16.78 + 20.91 . . . . —55 22 45.40 24 0 Ophiuchi . . . 17 36 11.47 + .791 7.787 17 36 4.47 321 56 24.35 - 40.63 . . + 4 38 9.57 25 Venus . . N.L. 18 1 6.86 .164 7.777 18 0 59.25 351 18 28.25 7.94 . . 29.4 —24 44 57.42 26 a Lyrte .... 18 31 57.51 1.672 7.763 18 31 51.42 287 57 28.15 2 38.44 • • • • +38 39 2.58 27/ 8 a Scorpii . . . 16 20 22.47 + .161 8.569 16 20 14.00 352 39 24.18 — 6.67 8.78 —26 5 34.02 G. 28 a Tri. Aust. . . 16 33 0.57 —1.132 8.573 16 32 50.86 35 17 36.13 + 36.60 . . 08 44 29.84 29 a Arie .... 17 20 25.51 — .283 8.589 1 20 16.04 16 18 24.03 + 15.13 49 44 56.27 30 Venus . . N.L 17 55 26.04 + .190 8.601 r 55 17.63 350 35 20.88 — 8.57 . . 30.2 —24 1 59.62 31 a Lyras .... 18 31 58.89 +1.103 8.613 18 31 51.38 287 57 18.66 —2 37.84 • • • • +38 39 2.05 32 10 a Tri. Aust. . . 1633 1.94 —1.334 9.664 16 32 50.94 35 17 36.40 + 36.48 8.03 —68 44 30.75 M. 33 Venus . . NL. 17 51 2.04 + .099 9.682 17 50 53.46 350 4 36.78 9.03 30.6 —23 31 16.23 34 a Lyras .... 18 31 59.73 1.068 9.691 18 31 51.11 887 57 17.20 2 37.37 • • +38 39 2.20 35 12 Venus . . N.L. 17 40 15.06 .130 10.003 17 46 5.19 349 32 30.13 9.44 9.83 +31.0 —22 58 1.-.9 M. 36 a Lyras .... 18 31 59.64 1.759 10.003 18 31 51.40 287 57 17.43 2 36.03 +3839 1.06 37g 13 Venus . . S.L. 17 43 45.58 .137 10.559 17 43 35.16 349 17 2.25 9.59 8.70 — 31. 1 —22 42 38.75 M. 38 a Lyras .... 18 31 59.59 1.759 10.495 18 31 50.85 287 57 16.25 +2 34.55 +3839 1.11 39 20 a Seorpii . . . 16 20 £0.95 + .214 6.736 16 20 14.43 352 39 30.03 — 6.74 -13.20 p -26 5 35.98 G. 40 a Tri. Aust. . . 16 33 0.81 —2.771 6.731 16 32 51.31 35 17 38.68 + 37.05 . 68 44 28.42 41 17 Ophiuchi . . . 17 1 53.90 + .577 6.722 17 1 47.75 342 6 3.95 — 16.91 15 33 0.73 42 0Aras . . . . 17 12 59.68 —1.170 6.718 17 1251.79 21 56 6.18 + 21.08 . . . 55 22 39.95 43 Venus . . N.L. 17 21 28.82 + .437 — 6.715 17 21 22.54 346 48 36.73 — 12.27 • • +30.8 —20 IS 7.95 a a Ara? certainly is not so bright as /?, and yesterday was not dis- d Passing cumuli during observations. tinguishable, a Lyras extremely tremulous. e Declination of 0 Ophiuchi doubtful, o Aras not distinguishable. 6 The stars were very much blurred and quite unsteady, a Aras f a Arils rather brighter than /?. not discernible. g The crescent of Venus very slender; and cusps badly denned. c Constant cumuli. Declination of Venus very doubtful. AT SANTIAGO UE CHILE. 323 B 1 I! 1 = Corrections [or 3 £ Apparent Circle reading. Kefiae Nadir. E Observed 6 Mate. Object. ~ T: f A. K. UK .lil 1,1 IniK lull!. g ;: "|i lient ^ s •^ ~ ~ observed. niicrOsenjj,'> ~ declination. V * :. JE * hist. Chick. 6 e K c-° o J3 1850. h. m. s. 8. s. h. m. s. « * // / ,, tl „ a / ii la lift: -.'-J a Scorpii . . . 16 20 20.38 +0.247 -6.30-2 16 20 14.33 35? 39 31.15 6.68 -13.55 -26 5 36.81 G. 2 a Tri. Aust. . . 16 33 0.53 -2.771 6.301 16 31 51.46 35 17 38.10 + 30.71 f m 68 44 27.15 1 tt Ophiuchi . . . 17 1 53.34 + .577 6.298 17 1 47.62 312 G 4.50 - 16.70 . . 15 32 0.08 4 0 Am . . . . 17 13 59.40 -1.170 6.297 17 13 51.93 21 56 8.70 + 20.89 . . 55 22 41.93 5 Venus . . N.L. • • .... 346 33 27.22 — 12.40 • • +30.4 19 59 57.56 6 29 a Tri. Aust. . . 16 32 59.77 —3.268 4.656 16 32 51.86 35 17 26.23 + 36.84 3.10 68 44 25.86 a. 7 '/ < 'pltiiiehi . . . 17 1 52.50 + .123 4.655 17 1 47.97 342 5 53.90 — 16.82 . . . 15 31 59.87 8 Venus . . S L. 17 8 9.51 .040 4.655 17 8 4.90 345 5 20.53 13.87 —28.2 18 31 1.25 9 31 Venus . . S.L. 17 6 21.05 + .038 4.460 17 6 19.63 344 47 8.75 14 30 3.95 27.4 18 12 49.09 G. 1851. 106 Jan. 5 a Scorpii , . 16 20 18.60 - .ax 3.674 16 20 14.72 352 39 21.95 - 6.79 6.40 . . 26 5 37.65 a. 11 a Tri. Aust. . . 16 32 59.97 —4.238 3.671 Hi 31 52.06 35 17 27.60 + 37.29 . . 68 44 24.38 12 Ve:ius . . SL. 17 4 56.6-1 + .124 3.651 17 4 53.11 344 15 47.15 — 14.85 . 25.4 17 41 26.39 13 ffAn . . . . 17 12 58.15 —2.056 3.616 17 12 52.45 21 55 59.00 + 22.38 . . —05 22 40.87 14 a Ophiuchi . . . 1728 1.49 +1.157 3.636 17 27 59.01 313 54 12.43 - 54.69 • • +12 40 22.77 15 6 n Peorpii . . . 1C SO 18.00 - .964 2.863 16 20 14.87 352 39 29 38 — 6.66 8.48 . —26 5 40.13 G. 16 a Tri. Aust. . . 10 32 59.5-1 -4.359 2. 856 16 32 02.32 35 17 31.05 + 36.57 , . 68 44 25.03 17 Venus . . S.L. 17 5 8.48 + .070 2.837 17 5 5.71 344 11 53.85 - 14.63 . . 25.0 17 37 31.63 18 a Arre . . . 17 20 21.55 —1.531 2.829 17 20 17.19 16 18 17.35 + 15.12 . . . —49 44 49.88 19 a Ophiuchi . . . 17 28 0.99 +1.175 2.8J4 17 27 59.31 313 54 13.55 — 53.63 • • • • +12 40 22.67 20 c 7 a Scorpii . . . 16 20 17.66 - .210 2.429 16 20 14.99 352 39 27.90 - 6.72 7.50 —26 5 39.57 G. 21 a Tri. Aust. . . 16 32 59.43 -4.568 2.425 16 32 52.44 35 17 31.18 + 36.89 . . 68 44 26.46 22 Venus . . S.L. 17 5 29.94 + .117 2.415 17 5 27.64 344 8 42.45 — 14.81 . 24.6 17 34 21.43 23 a Aric .... 17 20 21.29 —1.585 2.411 17 20 17.29 16 18 17.33 + 15.25 . . . —49 44 50.97 24 a Ophiuchi . . . 17 28 0.59 +1.223 2.408 17 27 59.40 313 54 12.85 - 54.11 +12 40 22.87 25 d 8 a Scorpii . . . 16 20 17.20 — .163 2.033 16 20 14.98 352 39 25.08 — 6.69 7.68 —26 5 36.60 G. 26e a Tri. Aust. . . 16 32 58.80 -4.257 2.058 16 r2 52.49 27 Venus . . S.L. 17 6 0.84 + .188 2.016 17 5 58.98 344 6 13.50 — 14.78 . 24.2 17 31 52.73 28 li Arn- . . . 17 12 56.68 —2.113 2.044 17 12 52.52 21 56 1.70 + 20.90 55 22 40.81 29 a Araj .... 17 20 20.74 1.481 2.041 17 20 17.22 16 18 17.35 + 15.19 • • • • 49 44 50.75 30 9 a Scorpii . . . 16 20 16.56 .277 1.373 16 20 14.91 352 39 24.73 — 6.66 8.20 t 26 5 35.76 G. 31 a Tri. Aust. . . 16 32 58.23 4.336 1.369 16 32 52.53 35 17 29.13 + 36.55 68 44 23.37 32 Venus . . S.L. 17 6 40.82 .007 1.357 17 6 39.46 344 4 26.88 - 14.74 . . £3.9 —17 30 5.93 33/ a Arie .... 17 20 20.19 —1.660 1.353 17 20 17.18 M a. Ophiuchi . . . 17 27 59.70 + 1.010 1.350 17 27 59.36 313 54 14.45 53.62 +12 40 21.48 35« 10 a Scorpii . . 16 20 16.36 — .277 1.128 16 20 14.96 352 39 26.18 - 6.65 7.63 , —26 5 37.79 G. 36 a Tri. Aust. . . 16 32 57.58 —4.055 1.124 16 32 52.40 35 17 27.48 + 36.49 . . 68 44 22.23 37 Venus . . S.L. 17 7 29.97 + .049 1.115 17 7 28.90 344 3 16.28 - 14.74 23.4 17 28 56.40 38 a A p.;- .... 17 20 19.91 —1.491 1.112 17 20 17.31 16 18 15.28 + 15.09 —49 44 48.63 39 a Ophiuchi . . . 17 27 59.29 +1.049 1.109 17 27 59.23 313 54 13.50 — 53.52 • • • • + 12 40 21.76 40 11 a Scorpii . . . 16 20 16.43 — .228 1.280 16 20 14.92 352 39 29.95 — 6.69 -10.50 . . —28 5 38.65 G. 41 a Tri. Aunt. . . 16 32 58.05 —4.253 1.282 16 32 52.52 35 17 31.83 + 36.74 68 44 23.96 42 Venus . . S.L. 17 8 28.31 + .119 1.285 17 8 27.17 344 2 47.85 — 14.84 —23.1 17 28 25.30 43 a Ar.'e .... 17 20 20.20 —1.6)0 1.286 17 20 17.30 16 18 20.75 + 15.19 . . . —49 44 51.33 44 « Ophiuchi. . . 17 27 59.41 +1.183 —1.288 17 27 59.31 313 54 19.08 — 53.88 • • - • +12 40 19.41 « Declination observed at wire F. D«OEMBIR 23 — It being found that the t'cnialc screw to the mi- 6 a Scorpii very unsteady. Declination of o Ophiuchi uncertain. cromcter moving the horizontal system of wires was worn out, a Ara: not to be seen. the eye-piece was removed, and the system of wires being c Measured diameter of Venus doubtful. accidentally broken, anew one was inserted; the instrument d Declination of a AM uncertain. was ready for use again on the 27th, but that and tile following e Seen by flashes only. days were cloudy. / Too faint to measure declination. R a Ara- brighter than ft. The instrument was lifted from the Ys and pivots and micrometers cleaned. 32-1 MERIDIAN CIRCLE OBSERVATIONS, 1850-51, --' -- Corrections for -s 1 a ~ c Apparent Circle renilin", Refrac- Nadir. • Observed ti 8 Date . Object. j | £ A. li. mean <>t H'lir observed. microscopes. tion. i SI apparent declination. | a Ilfet. Clock. 0) .d 6 s. |ihi o O 1851. li. m. s. s. s. h. m. s. // // 0 / // 1 Jan. 12 o Scorpii ... 16 20 10.31 -0.140 — 1.416 16 20 14.75 352 39 30.78 — 6.61 —13.75 —26 5 36.31 (J 1! 3 ,, Opliiuclli . . 17 1 49.61 + -236 Venus . . S.L. 17 9 35.25 .159 1.420 1 .421 17 1 48 43 312 6 8.15 16.58 17 9 33.99 344 2 49.08 14.68 , —22 7 15 32 3.71 —17 28 23.84 4 a Ophiuchi . . H27 59.40 +1.267 1.423 17 27 59.25 313 54 19.75 53 28 • • + 12 40 21.39 ft 13 a Scorpii . . . 1C 20 16.03 — .254 .586 16 20 15.19 352 39 32.08 — 6.67 13.05 . . —28 5 38.25 G. e a Tri. Aust. . . 16 32 58.10 -4.698 .578 16 33 52.82 35 17 34.63 + 36.61 . . 63 44 24.08 i 7 i, Ophiuchi . . 17 1 49.01 + .210 .560 17 1 48.68 342 6 6.43 — 16.71 15 32 2.56 e Vi-nus . . S.L. I" 10 -19.61 .128 .555 17 10 49.18 344 3 33.48 14.78 22.3 —17 28 59.21 ii a Ophiuchi . . 17 27 58.76 1.303 - .544 17 27 59.52 313 54 16.85 53.70 +12 40 21.01 10 b M ^' Scorpii ... 15 55 44.94 + .062 + 33B 15 56 45.33 345 57 28.10 12.88 15.40 . . —19 23 25.71 G. 11 a Scorpii . . . : 16 20 14.70 - .010 .336 16 20 15.03 352 39 33.25 — 6.63 26 5 37.11 19 a Tri. Aust. . . 16 32 53.35 — .992 .344 16 32 52.70 35 17 33.88 + 36.42 . . 68 44 23.79 13 ij Ophiuchi . . 17 1 47.96 !+ .101 .360 17 1 48.42 342 6 8.58 — 16.62 15 33 2.45 14 Venus . . S.L. 17 12 11.83 .081 .366 17 12 12.28 344 4 29.88 14.69 . . 21.9 —17 30 3.78 15 a Ophiuchi . . 17 27 58.40 .339 .375 17 27 59.11 313 54 25.50 53.42 • • • • +12 40 17.43 16 c 15 0* Scorpii . * . . 15 56 44.07 .476 .937 15 56 45.48 345 57 28.73 12.85 12.88 —19 23 28.89 G. 17 a Scorpii . . . 16 20 13.94 ;+ .424 .946 16 20 15.31 332 39 32.38 — 6.98 26 5 38.41 18 a Tri. Aust. . . 16 32 51.95 — .090 .951 16 32 52.99 35 17 35.13 + 36.36 . . . . 68 44 24.50 19 n Ophiuchi . . 17 1 47.03 '+ .506 .963 17 1 48.50 342 6 6.48 — 16.60 . . 15 32 2.89 BO Venus . . S.L. 17 13 41.88 .491 .968 17 13 43.34 : 344 5 58.88 14.64 21.5 —17 31 35.75 31 a Ophiuchi . . 17 27 57.77 .761 .973 1 7 27 59.50 313 54 20.63 53.33 • • +12 40 19.69 EM 16 /?' Scorpii . . . 15 56 43.56 .510 1.396 15 56 45.47 345 57 28.85 12.86 14.38 —19 23 27.50 G. 33 a Scorpii . ... 16 20 13.34 + .424 1.404 16 20 15.17 352 39 34.20 — 6.62 . . . . 26 5 39.09 24 a Tri. Aust. . . 16 32 52.04 — .587 1.408 16 32 52.86 35 17 34.78 + 36.39 . . . . 68 44 22.68 £5 n Ophiuchi . . 17 1 46.57 + .559 1.418 17 1 48.55 342 6 8.68 — 16.61 . . 15 32 3.58 26 Venus . . S.L. 17 15 19.86 .533 1.422 17 15 21.82 344 7 58.73 — 14.63 21.2 17 33 34.41 27 a Arm .... 17 20 15.98 .049 1.424 17 20 17.45 16 18 23.05 + 15.04 . . . . —49 44 49.60 28 a Ophiuchi . . 17 27 57.17 .938 1.426 17 27 59.53 313 54 21.30 - 53.36 . . , . + 12 40 20.55 39 17 /?' Scorpii . . . 15 56 43.50 .175 1.841 15 £6 45.52 345 57 27.83 13.04 13.43 . —19 23 27.25 G. 30 a Scorpii . . . 16 20 13.39 + .007 1.852 16 20 15.25 352 39 33.65 — 6.71 . . . . 26 5 39.40 31 a Tri. Aust. . . 16 32 52.80 —1.593 1.858 16 32 53.07 35 17 34.93 + 36.88 . . 68 44 24.27 32 1 Ophiuchi . . 17 1 46.57 + .173 1.872 1 7 1 48.61 342 6 8.58 - 16.84 . . 15 32 4.20 33 Venus . . S.L. 17 17 5.71 .142 1.879 17 17 7.73 344 10 19.18 14.78 20.9 —17 35 55.96 34 a Ophiuchi 17 27 56.96 .571 1.885 17 27 59.42 313 54 22.23 54.09 • • • • +12 40 19.40 35 20 /?' Scorpii . . . 15 56 43.47 .039 2.102 15 56 45.61 345 57 26.65 13.01 11.33 —19 23 28.17 G. 36 a Scorpii ... 16 20 13.08 + .018 2.098 16 QO 15.20 3523931.73 — 6.72 . , . . 26 5 39.57 31 a Tri. Aust. . . 16 32 51.27 — .256 2.095 16 32 53.11 35 17 32.53 + 36.88 , 68 44 23.97 M 0 Are .... 17 12 51.24 — .110 2.088 17 12 53.22 21 56 3.85 + 20.90 55 22 39.31 39 Venus . . S.L. 17 23 5.46 + .043 2.087 17 23 7.59 344 19 18.48 — 14.63 — 19 8 —17 44 58.61 40 a Ophiuchi . . ; 17 27 57.09 .126 2.086 17 27 59.30 i 313 54 20.25 54.10 . . . . +12 40 19.49 1 41 31 /?' Scorpii ... 15 56 43.45 + .085 1.848 15 56 45.38 j 345 47 28.85 12.79 —12.40 —19 23 29.55 G. 43 a Scorpii . . . 16 20 13.43 — .042 1.844 16 20 15.23 352 39 31.73 — 6.59 26 5 38.63 43 a Tri. Aust. . . 16 32 52.40 —1.035 1.841 16 32 53.20 35 17 33.78. + 36.18 68 44 23.45 44 n Ophiuchi . . 17 1 46.54 + .062 + 1.836 17 1 48.44 342 6 6.45 - 16.52 —15 32 3.42 a The instrument was lifted and the azimuth and level screws c The circle was so that a Trianguli Australia must pass within changed after the observations. 5" of the horizontal wire, but it could not be discerned until * I do not understand why, since the 9th, a Trianguli Australia has between C and D. not been seen until after it had passed the first wire. d The collimating screw was moved. AT SANTIAGO DH CHILE. 325 B — = CJ 1 c '- = = Corrections for £ <£i - O j \nnarent Circle reading. Refrac- Nadir. Observed i Date. Object. "27 s A.TJ." nit-aii of four tion. 2 apparent i fc ^ z ~ observed. mu-ro.-copes. = declination. > Inst. Clock. 1 Ji* • o I 0 1851. h. ill. s. 8. s. h . m. s. 0 / // / n „ „ « / n 1 Jan. 21 a Arn; .... 17 20 15. CK -0.375 + 1.833 17 20 17. 3» 16 18 23.43 + 14.96 —12.40 , . —49 44 51.88 G. 2 Venus . . S.L. 17 25 18.97 + .041 1.832 17 25 20.84 344 23 54.43 — 14.30 • • —19.5 17 48 34.12 3 22 0' Scorpii . . . 15 56 43.50 + .054 2.123 15 55 45.68 345 57 28.20 L. 12.83 13.50 19 33 27.76 G. 4 a Scorpii . . . 16 20 13.27 — .040 2.125 16 20 15.35 352 39 34.00 — 6.61 . . . , 96 5 39.78 5 aTri. Aust. . . 16 32 52.59 —1.4:33 2.126 16 32 53.29 35 17 32.38 + 36 30 68 44 21.07 6 i} Ophiuehi . . 17 1 46.43 '.+ .103 2.130 17 1 49.66 342 6 8.10 — 16.57 , . . . 15 32 2.92 7a a Arffi . . . 17 20 15.99 — .415 2.132 17 20 17.71 16 18 23.33 + 15.01 , . . 49 44 50.73 8 Venus . . S.L. 17 27 37.94 + .073 2.133 17 27 40.15 344 26 43.40 — 14.28 19.2 17 52 23.31 !> 23 a Scorpii . . . 16 20 13.16 — .041 2.296 16 20 15.41 352 39 34.58 - 6.59 15.98 26 5 37.90 G. 10 aTri. Aust. . . 16 32 52.77 -1.775 2.300 16 32 53.30 35 17 33.70 + 36.22 , . . . 68 44 19.83 11 rj Ophiuehi 17 1 46.27 + .138 2.306 17 1 48.71 342 6 10.10 — 16.52 t . 15 32 3.49 12 b Venus . . S.L. 17 30 3.21 j+ .099 2.312 17 30 5.62 344 30 41.08 14.18 18.9 17 56 17.91 13 24 a Scorpii . . 16 20 12.77 — .107 2.707 16 20 15.37 352 39 34.50 — 6.65 14.65 f 26 5 39.09 G. 14 a Tri. Aust. . . 16 32 52.59 —1.910 2.710 16 33 53.39 35 17 34.20 + 36.55 , . . . 68 44 20.19 15 r] Ophiuehi . . 17 1 45.86 + .078 2.718 17 1 48.68 342 6 7.30 - 16.68 t , , . 15 32 1.86 16 a Ara .... 17 20 15.67 — .709 2.722 17 20 17.68 16 18 21.98 + 15.11 . . -49 44 48.33 17 a Ophiuehi . . 17 27 56.33 — .525 2.724 17 27 59.53 313 54 25.15 — 53.62 . +12 40 17.23 18 Venus . . S.L. 17 32 34.08 + .036 2.726 17 33 36.84 344 34 47.43 14.35 - • 18.6 —18 0 23.82 10 25 a Scorpii . . . 16 20 13.54 — .140 3.006 16 20 15.41 352 39 35.03 — 6.69- 15.33 26 5 38.90 G. 90 a Tri. Anst. . . 16 32 52.50 -1.978 3.009 16 33 53.53 35 17 32.98 + 36.78 68 44 20.32 31 rj Ophiuehi . . 17 1 45.56 + .049 3.015 17 1 48.62 342 6 10.73 — 16.79 . . . . 15 32 4.50 33 • An ..'.'. 17 20 15.47 — .753 3.019 17 20 17.74 16 18 20.45 + 15.21 . —49 44 46.22 93 a Ophiuehi 17 27 55.97 + .504 3.020 17 27 59.49 313 54 24.80 — 53.95 , . . . +12 40 18.59 34 Venus . . S.L. 17 35 10.61 + .009 3.023 17 35 13.73 | 344 39 0.50 14.27 18.3 —18 4 56.79 35 26 a Scorpii . . . 16 20 12.39 — .107 3.213 16 20 15.50 352 39 32.90 6.71 13.15 . 26 5 38.93 G. 26 a Tri. Aust. . . 16 32 52.34 —1.910 3.213 16 32 53.64 35 17 30.45 + 36.87 . . 68 44 21.06 * 27 0 Arx . . . . 17 12 51.16 .841 3.217 17 12 53.54 28 a Ara; .... 17 20 15.17 — .622 3.217 17 20 17.76 16 18 19.40 + 15.24 . , —49 44 48.38 29 a Ophiuehi . . 17 27 55.94 + .582 3.218 17 27 59.74 313 54 22.38 — 54.08 ' . . + 12 40 17.96 30 c Venus . . S.L. 17 37 52.71 + .034 3.219 17 37 55.96 344 43 18.70 14.34 • • 18.0 —18 9 0.20 31 27 a Scorpii . . . 16 20 12.37 — .019 3.210 16 20 15.56 352 39 37.60 - 6.74 15.43 . 26 541.32 G. 33 a Tri. Aust. . . 16 32 52.33 —1.730 3.210 16 32 53.71 35 17 34.18 + 37.03 . . . . 68 44 21.67 33 17 Ophiuehi , . 17 1 45.33 + .158 3.211 17 1 48.70 342 6 10.40 — 16.92 . . . . 15 33 3.94 34 0 Am . . . . 17 12 51.03 — .810 3.211 17 12 53.43 21 56 6.03 + 21.08 . . . . 55 22 37.57 35 a Arte .... 17 20 15.30 — .590 3.212 17 20 17.92 an Venus . . S.L. 17 40 39.96 + .115 3.213 17 40 43.29 344 47 42.73 — 14.22 • • 17.7 18 13 91.27 37 28 a Scorpii . . . 16 20 12.19 — .047 3.293 16 20 15.44 352 39 35.95 — 6.73 14.43 96 540.68 G. 38 a Tri. Aust. . . 16 32 52.59 -2.222 3.293 16 32 53.66 35 17 34.30 + 36.97 . . . . 68 44 22.73 39 t] Ophiuehi . , 17 1 45.27 + .177 3.295 17 1 48.74 342 6 10.75 — 16.87 . . . . 15 33 5.34 HI /3 Arffi .... 17 12 51.11 —1.070 3.295 17 12 53.33 21 56 5.88 + 21.04 . . 5522 38.38 41 a Ara; .... 17 20 15.22 — .685 3.295 17 20 17.83 16 18 23.38 + 15.37 . . . . 49 44 50.11 41 c Venus . . S.L. 17 43 32.26 + .121 3.297 17 43 35.68 344 52 6.05 — 14.13 —17.5 18 17 45.88 Of Feb. 3 a Scorpii . . 16 20 13.67 — .049 2.060 16 20 15.68 352 39 31.40 — 6.74 —10.70 36 5 39.85 G. 44 a Tri. Aust. . . 16 32 53.90 —1.834 2.057 16 32 54.12 35 17 30.68 + 37.02 68 44 93.89 45 rt Ophiuehi . . 17 1 46.74 +0.135 + 2.052 17 1 48.93 342 6 6.85 — 16.90 • • -15 32 5.14 a Declination of a Ara? is not considered good. e The planet and stars were very unsteady. A workman being /. Declination of Venus observed through cirri, and deemed un- engaged breaking out stone on the eastern side of "Santa Lu- certain. cia," every blow of his iron maul disturbed the mercury, c The planet very unsteady. making measures for the nadir very difficult. d The planet extremely unsteady. / Declination of Venus observed through cirri. 326 MERIDIAN CIRCLE OBSERVATIONS, 1850-51. £ e '7. rt c v Corrections for •a I 1 ~" £ Apparent Circle rrruiins.-. Refrac- Niidir. S Observed 1 Date. Object. £?? E t> J3 A. K. obst.Tved. nt'-an of four microscopes. tion. & £ Jlpprirt-Ilt »k-clm:uion. E £ c = £ Ill!-t. Clock. Jj 5 0 ji. 0 U 1 1851. h. in. s. s. 8. h. in. s. o , „ / // i/ II « /, ,/ 1 Feb. 3 /JArro . . . . 17 13 52.48 —0.775 +2.049 17 12 53.75 21 56 3.25 + 21.07 —10.70 —15 22 39.51 G. 2 a Ophiuclii . . . 17 27 57.21 + .578 2.048 17 27 59.8-1 313 54 24.58 - 51.30 + 12 40 14.53 3 Venus . . S L. 18 2 22.88 + .082 2.040 18 2 25.00 315 17 20.78 13.74 — ir».9 -18 43 6.33 4 5 a Scorpii . . . 16 20 14.11 — .141 1.785 16 20 15.75 352 39 22.28 • 6.74 +0.3S . 26 5 41.81 G. 5 oTn.Aust. . . 16 33 54.69 —2.113 1.783 10 :« 51.30 35 17 19.48 + 3U.99 68 44 22.74 6 t] Ophiuchi . . . 17 1 47.17 + .063 1.778 17 1 49.01 343 5 56.33 - 16.89 15 32 5.71 7 ffArm . . . . 17 12 5:1.10 —1.052 1.778 17 12 53.62 21 55 53.5.) + 21.05 55 23 39.87 8 a Arie .... 17 20 17.14 — .800 1.77.-, 17 20 18.11 16 18 9.50 + 15.29 . . 49 44 51.06 9 Venus . . S.I,. 18 8 12.13 + .001 1.768 18 9 13.90 315 24 35.50 - 13.61 15.6 18 50 32.56 10 a 6 a Seorpii . . . 16 20 14.24 — .173 J.7I8 16 20 15.78 352 39 22.60 - 0.67 -1.48 26 5 -10.34 G. 11 a Tri. Aust. . . 16 32 5-1.77 —2.180 1.718 16 32 51.31 35 17 20.UO + 36.63 . . 68 44 22.94 12 ij Ophiuchi . . . 17 1 47.18 + .032 1.717 17 1 48.93 342 5 58.63 — 16.73 . . , 15 33 6.31 13 0Am . . . . 17 12 53.10 —1.101 1.717 17 12 53.71 21 55 53.05 + 20.85 55 22 38.31 14 a Arm . , . 17 SJ 17.27 |— .844 1.717 17 20 18.14 16 18 9.28 + 15.15 , . —49 41 48.84 IS a Ophiuchi . . . 17 27 57.69 + .528 1.716 17 27 59.93 313 54 1.1.25 — 53.74 . . + 12 40 14.08 16 Venus . . S.L. 18 12 41.88 — .030 1.716 18 12 43.57 34528 1.45 13.42 • ' 15.4 —18 53 57.04 17 b 7 a Seorpii . . . 16 20 14.31 .167 1.806 16 20 15.95 352 39 24.08 • 6.70 2.35 -26 5 40.92 G. 18 a Tri. Aust. . . 16 32 55.10 —2.402 1.806 16 32 54.50 35 17 22.68 + 36.77 . . . . 68 44 22.99 19 il Ophuichi . . . 17 1 47.33 + .062 1.806 17 1 49.20 342 6 0.08 - 16.40 . 15 32 7.22 20 /JArm . . . 17 12 53.31 —1.200 1.806 17 12 53.92 21 55 53.68 + 20.92 . 55 22 38.14 31 a Ane .... 17 20 17.51 .913 1.806 17 20 18.40 16 18 9.40 + 15.20 49 44 48.14 S3 Venus . . S.L. 18 16 15.28 .010 1.806 18 16 16.99 345 31 17.00 - 13.42 15.2 18 57 11.92 23 c 10 a Scorpii . . . 16 20 14.86 .182 1.448 16 20 16.13 352 39 23.60 — C.75 —1.68 26 5 41.06 G. 34 a Tri. Aust. . . 16 32 55.86 —2.431 1.446 16 33 54.88 35 17 19.88 + 37.07 , 68 44 21.16 25 >/ Ophiuchi . . . 17 1 47.87 + .049 1.442 17 1 49.36 342 5 59.25 — 16.93 15 32 6.53 w /JAra; .... 17 12 54.10 —1.221 1.440 17 12 54.32 21 55 53.20 + 21.10 . t 55 22 38.51 27 a Ai;i .... 17 20 18.01 .932 1.439 17 20 18.52 16 18 9.15 + 15.33 , . . . 49 44 48.69 28 Venus . . S.L. 18 27 14.34 — .025 1.438 18 27 15.75 315 39 24.78 — 13.40 —14.5 —19 5 21.09 29 a Lyree .... 18 31 49.80 +1.244 +1.430 18 31 52.47 287 57 34.95 —2 39.81 • • +38 38 40.65 a IS Arte is full a half magnitude brighter than a. c 0 Ara is unquestionably a half magnitude brighter than a. b a Aric is certainly not so bright as /?. After the observations the instrument was lifted, and the pivots cleaned with black lead. INFERIOR CONJUNCTION OF VENUS, 1852. MERIDIAN CIRCLE OBSERVATIONS. s c II Corrections for | jj g 2 £ £ S Apparent Cirelereadinp, Ilefrac- Nadir. S Observed S Date. Object. "£~5 1 A. It. moan of four tion. a apparent S .. observed. microscopes. declination. £ 6 ||| Inst. Clock. I I it o " ' o ° 1852. h. m. s. s. m. s. h. m. 8. ° i ii / u „ „ • / u It May 30 c ranis Maj. . . . 6 53 29.66 +0.185 — 0 42.475 6 52 47.37 355 19 51.7 — 0 4.28 +21.2 . . —28 46 34.51 G. 3 a* Gominorum . . 7 35 50.71 — .6-25 42.474 7 25 7.61 294 22 37.7 I 54.66 . . . . +32 12 29.87 3 (3 Geminorum . . . 7 36 57.09 .496 42.473 7 36 14.12 398 12 2.3 1 37.06 . . 28 22 47.67 4 Venus . , . S.L. 7 43 33.10 — .511 42.473 7 43 40.12 302 27 35.1 1 31.93 . . —14.6 i+24 7 14.34 5 8 1 56.01 + .114 42.471 8 1 13.65 350 26 24.9 8.83 —23 53 3.16 SI 31 a Canis Min. , . . 7 32 14.36 — .138 41.833 7 31 32.39 320 58 1.4 43.51 19.4 + 5 35 56.82 G. 7 /? Geminorum . . . 7 36 56.20 .375 41.833 7 36 13.99 298 12 7.3 1 39.69 . . 28 22 47.10 8 Venus . . . S.L. 7 46 37.14 — .398 41.833 7 45 54.91 302 39 10.4 1 33.51 —14.8 +33 55 42.62 . 9e June 2 t Canis Maj. , , . 6 53 29.97 + .300 42.954 6 52 47.32 355 19 49.2 4.38 23.1 . . -28 46 32.81 G. 10 a Canis Min. . . . 7 32 15.24 + .012 42.969 7 31 32.28 320 57 57.7 43.43 . . . . |+ 5 35 57.74 11 /? Geminorum . . . 7 36 57.35 — .284 42.972 7 36 14.09 398 13 5.4 1 39.51 . . ! 28 22 46.12 13 Venus . . . N.L. 7 52 53.17 — .163 42 978 7 52 10.03 303 2 21.8 1 22.13 . . +15.2 +23 31 57.14 13 8 1 56.33 + .246 42.982 8 1 13.59 350 36 32.3 9.03 —23 53 1.26 m 14 d 3 t Canis Maj. . 6 53 30.64 .313 43.557 6 52 47.40 355 19 50.6 4.32 23.4 —28 46 34.57 G. 15 a Canis Min. . . . 7 32 15.74 + .019 43.573 7 31 32.19 j 320 57 54.3 42.83 . . + 5 36 0.24 16 /? Geminorum . . 7 36 57.83 — .206 43.576 7 36 14.05 298 12 1.8 1 38.30 . . . . 28 22 48.11 17 Venus . . . S.L. 7 55 54.07 — .158 43.583 7 55 10.33 303 15 10.3 1 30.28 . . —15.4 +23 19 37.09 18 8 1 56.87 J- -352 43.586 8 1 13.64 350 26 21.4 8.90 . . —23 53 0.66 19 e 1-2 a Canis Maj. 6 39 27.37 .117 50.840 6 38 56.65 343 4 52.2 16.48 5.3 16 31 6.91 G. 20 s Canis Maj. . . . ! 6 53 38.W .089 50.859 6 53 47.46 355 20 8.1 4.42 . . . . —28 46 34.87 21 a' Geminorum . . . 7 25 58.69 .318 50.898 7 25 8.01 294 22 59.1 1 58.77 . . . . +32 12 38.48 33 a Canis Min. . . . 7 32 23.19 .185 50.906 7 31 32.47 320 58 16.4 43.87 . . , . 5 35 56.38 23 /i Geminorum . . . 7 37 4.92 .309 50.911 7 36 14.22 298 12 23.4 1 39.75 . . . . +38 £2 45.16 j 34 8 2 4.54 .118 50.9-14 8 1 13.71 350 26 39.7 9.09 -33 53 1.80 ! 25 Venus ... N.L 8 19 2.88 .209 50.964 8 18 12.13 305 14 3-2.9 1 16.18 • • +17.8 +31 19 54.29 26/ 13 e Canis Maj. . . . 6 53 40.01 .125 52.655 6 52 47.48 355 20 4.6 4.59 6.1 . . —38 46 3-2.00 G. 27 a" Geminorum . . . 7 36 0 77 .327 52.695 7 25 8.30 294 22 56.7 1 57.07 . . . . +32 12 28.38 28 a Canis Min. . . . 7 32 25.04 .200 52.700 7 31 3-2.54 320 58 12.9 43.23 . . . . + 5 35 58.34 29 8 2 8.26 .135 52.739 8 1 13.66 350 26 36.4 9.01 -23 52 59.38 30 Venus . . . S.L. 8 21 8.44 .218 0 52.761 8 20 15.90 305 29 4.0 1 14.97 • • —18.1 +21 5 57.08 31 « 22 a Canis Maj. . . . (} 39 44.50 .099 1 7.804 6 38 36.79 313 4 44.3 16.21 +10.2 . . —16 31 4.18 G. 32 c Canis Maj. . . . 6 53 55.17 +0.076 — 1 7.820 6 53 47.43 355 19 59.1 — 0 4.36 -28 46 30.83 it Objects quite tremulous. / In the recorded observation of t Canis Majoris, micrometers 6 Observation of the diameter of Venus doubtful. B and C were no doubt read 10'' too liltlc. Observations of c Venus excessively unsteady when measuring her diameter. a* Geminorum but little better than guessing. The planet d Very unfavorable observation of the diameter of the planet. very tn-muloUB. e Since llie obyfrvntions on the 3il the instrument has been entirely £ Observations all very fair. cleaned, and a new vertical wire inserted in place of A. Very indifferent observation of a9 Cominorum. 328 MERIDIAN CIRCLE OBSERVATIONS, 1852, No. lor reference. Date Object. Observed transit reduced to inran of win->. Corrections for i Apparent A U. observed. Circle reading. j mean ol'fimr niicroycopus. Refrac- tion. Nadir. Corr'n for semid. Observed apparent declination. Observer. but Clock. 1 2 3 4 B« 6 7 8 9 10 11 12 131 14 15 16 17 18 c 19 30 31 23 23d 24 25 '26 27 28 29 30 31 3-2 33 34 e 35 36 37 »/ 39 40 41 43 43g 44 45 1852. June 22 23 24 28 29 30 July 1 5 6 a t '.-ini- Mill. . . . h. m. s. 7 32 39.97 8 2 21.50 8 31 32.30 9 14 14.34 6 39 45.90 6 53 56.79 7 32 41.76 7 37 23.43 8 2 23.00 8 35 21.68 9 14 15.96 9 21 27.67 6 39 46.84 6 53 57.97 7 37 34.30 8 223.89 836 J.53 6 39 38.54 7 32 34.26 8 36 58.21 9 14 8.34 9 21 20.09 7 32 32.26 7 37 13.72 8 2 13.51 8 36 48.74 9 14 6.27 9 21 18.06 7 37 12.02 8 2 11.84 B 37 29.71 9 14 4.51 9 21 16.19 7 32 28.39 8 36 0.94 9 14 2.74 9 21 14.33 6 53 36.50 8 2 2.37 8 34 28.36 9 13 55.29 9 21 6.97 7 32 19.43 8 2 0.83 8 31 11.21 s. +0.142 .085 + .159 — .022 + .112 .046 .217 .332 .074 + .278 - .235 + .153 + .032 — .045 -f- .289 — .013 + .226 .088 .185 + .268 — .301 + .118 .155 + .289 — .010 + .233 — .388 4- .087 -f- .230 — .128 -(- .159 - .579 — .013 + .033 -f- .151 — .625 - .037 + .059 .101 + .410 - .354 f .238 .351 .137 +0.421 m. s. -1 7.862 1 7.894 1 7.939 1 7.973 1 9.282 1 9.298 1 9.337 1 9.341 1 9.337 1 9.400 1 9.440 1 9.447 1 10.390 1 10.368 1 10.302 1 10.264 1 10.212 1 1.991 1 1.916 1 1.827 1 1.775 1 1.765 59.959 59.954 59.930 59.873 59.821 59.813 58.024 57.990 57.944 57.894 57.885 56.121 56.039 55.990 55.981 49.010 48.930 48.892 48.845 48.836 47.261 47.228 - 47.196 h. m. s. 7 31 32.25 8 1 13.69 8 33 24.53 9 13 6.35 6 38 36.73 6 52 47.54 7 31 32.64 7 35 14.42 8 1 Ki. 71 8 34 12.56 9 13 6.29 9 20 18.38 6 38 33.48 6 52 47.56 7 36 14.29 8 1 13.61 8 34 51.54 6 38 36.64 7 31 32.53 8 35 56.65 9 13 6.26 9 20 18.44 7 31 33.46 7 38 14.06 8 1 13.58 8 35 49.10 9 13 6.06 9 20 18.33 7 36 14.23 8 1 13.72 8 36 31.93 9 13 6.04 9 20 18.29 7 31 32.30 8 35 5.05 9 13 6.13 9 20 18.31 6 52 47.55 8 1 13.54 8 31 39.98 9 13 6.09 9 20 18.37 7 31 32.52 8 1 13.74 8 30 24.47 •> i n 320 58 9.8 350 26 30.8 307 33 35.0 25 12 37.4 343 4 43.9 355 20 0.2 320 58 9.8 298 12 16.2 350 26 29.7 307 47 45.9 25 12 38.9 334 35 8.2 343 4 46.2 355 20 1.9 293 12 18.3 350 26 34.3 308 0 29.0 343 4 50.1 320 58 14.4 308 51 51.4 25 12 39.3 334 35 14.2 320 58 17.2 298 12 25.2 350 26 36.8 309 4 50.1 25 12 43.1 334 35 14.4 298 12 27.5 350 26 35.1 309 16 0.2 25 12 44.8 334 35 13.6 320 58 19.2 309 27 39.5 25 12 47.6 334 35 15.3 355 20 5.6 310 10 33.8 25 12 38.4 331 35 12.5 320 58 15.8 350 26 34.2 310 20 18.3 G. G. G. G. G. G. G. G. G. —0 43.08 8. So -1 8.88 + 24.94 - 16.04 4.31 42.64 1 37.67 8.84 — 1 7.49 + 24.69 — 24.91 16. C7 4.33 1 37.87 8.85 1 7.13 16.20 43.34 -1 5.93 + 25.06 — 25.27 42.87 1 38.26 8.91 -1 4.82 + 24.80 - 25.02 1 36.70 8.78 — 1 3.70 + 24.57 - 24.80 42.68 — 1 3.73 + 24.76 - 24.97 4.45 — 1 4.53 + 25.64 - 25.88 41.04 9.14 — 1 3.70 +10.2 9.8 5.9 5.4 0.7 + 0.3 - 1.8 + 2.5 +5.5 +20.9 -21.3 +21.6 +23.0 —23.4 +23.7 24.1 25.5 +25.8 + 5 35 57.17 —23 52 57.94 +19 0 36.89 —58 39 38.43 16 31 3.55 -28 46 31.58 + 5 35 57.15 +28 22 45.78 -23 52 56.55 +18 47 7.20 —58 39 39.28 — 8 1 18.98 -16 31 1.92 —28 46 29.36 +28 22 47.78 —23 52 57.24 + 18 33 44.74 —16 31 5.19 + 5 35 57.65 + 17 42 20.24 —58 39 35.65 - 8 1 20.22 + 5 35 59.08 +28 22 46.47 —23 52 54.48 + 17 30 11.53 —58 39 34.49 — 8 1 15.97 +28 22 43.01 —23 52 52.51 + 17 18 13.56 —58 39 35.56 — 81 14.99 + 5 3.) 59.39 +17 6 36.04 -58 39 36.45 8 1 14.42 -28 46 29.54 + 16 23 36.84 —58 39 32.43 - 8 1 15.01 + 5 35 56.85 -23 52 56.45 + 16 13 48.21 Venus . . . N.L a Canis Maj. . . . t Canis Maj. . . . a Canis Min. . . . i Geminorum . . . Venus . . . S.L. a Canis Maj. . . - f Canis Maj. . . . >' Geminorum . . . Venus . . . N.L. a Canis Maj. . . . a Canis Min. . . . Venus . . . N.L. a Hydra: .... a Canis Min. . . . /? Geminorum . . . Venus . . . S.L. fl Geminorum . . . Venus . . . N.L. o Hydra; .... a Canis Min. . . . Venus . . . N.L. : Canis Maj. . . . Vcnu* . . . N.L. a Hydra; a Canis Min. . . . Venus . . . N.L. a Objects as sharp and steady as on the best nights. b Tolerable observations, c Stars seen through cirri. Micrometer B changed after observa- tions. There was (iiiite a sharp earthquake between 1 and 2 JL. M. d Observations through cirri. 0 Geminorum extremely dim and douhtftil. Planet excessively unsteady. e Observations through clouds. / Cumuli constantly passing. Planet quitn unsteady. A severe earthquake occurred at 7*. 37/n. ; and the adjustments of the instrument, determined after the earthquake, are not applica- ble to the observation of t Canis Mnjori . g Stars blurred, nnd unsteady throughout. AT SANTIAGO DE CHILE. 329 Nn. for reference. Date. Object. Observed transit reduced to mean of wires. Corrections tor Apparent A. li. ol>H'l\ I'll. Circle readme, mean of four microscopes. Refrac- tion. Nadir. Curr'n for semid. Obscured npparent declination. Observer. Inst. Clock. 1 2 3a 4 5 6 7 8 9 10 1 11 13 13 14 15 16 c 17 18 19 20 SI 33 23d 34 25 26 27 28 30 31 33 33 Mi 35 36 37/ 38 39 40 41 «« 43 44 1853. July 6 7 8 9 10 13 18 26 29 1 t Argus . . rf . . h. m. 8. 9 13 53.46 9 21 5.26 6 39 23 39 6 53 33.36 7 32 17.81 8 1 59.17 8 29 45.21 9 13 52.10 9 31 3.81 6 53 31.49 7 32 16.06 8 1 57.36 8 28 9.84 9 13 50.17 921 1.86 6 39 19.01 6 53 30 00 7 33 14.71 8 1 55 93 8 26 25.88 9 13 48.49 921 0.36 6 39 17.54 6 53 28.51 7 32 13.17 8 1 54.40 8 24 33.68 9 13 47.24 9 20 58.97 6 39 12.71 6 53 23.66 7 31 8.31 8 1 49.52 8 18 12.24 9 20 51.04 732 1.69 8 3 46.58 9 20 47.40 6 53 7.80 7 31 52.50 7 42 44.68 8 1 33 65 7 31 49 43 -0.322 + .254 .173 .074 .333 .116 + .407 - .357 + .236 .518 .828 .561 .857 .074 .686 .621 .518 .828 .561 .860 .074 .686 .471 .348 .694 .400 + .766 — .187 + .549 .491 .371 .712 .404 .767 .567 .473 .587 .506 .549 .634 .578 .535 .606 +0.696 8. — 47.149 47.142 45.825 45.810 45 772 45 742 45.714 45 670 45 663 44.405 44.365 44.334 44.308 44.260 44.353 43.877 48.860 43.819 42.786 43.759 43.707 42.699 41.383 41.267 41.233 41.190 41.164 41.110 41.102 36.449 36.433 36.391 36.358 36.341 36.272 29.663 29.638 29.577 20.505 30.477 30.474 30.456 17.258 — 17.255 h. m. 8. 9 13 5.99 9 20 18.37 6 38 36.74 6 52 47.52 7 31 32.37 8 1 13.54 8 28 59.90 9 13 6.07 9 20 18.38 6 53 47.60 7 31 32.52 8 1 13.49 827 26.39 9 13 5.98 9 20 18.29 6 38 36.75 6 52 47.66 7 31 32.72 8 1 13.71 8 35 43.98 9 13 5.86 9 30 18.35 6 38 36.73 6 52 47.59 7 31 32.64 8 1 13.61 8 S3 52.28 9 13 5.94 9 20 18.43 6 38 36.75 6 53 47.60 7 31 32.63 8 1 13.57 8 17 36.67 9 20 18.36 7 31 32.50 8 3 17.53 9 20 18.33 6 52 47.84 7 31 32.65 7 42 24.78 8 1 13.73 7 31 32.83 7 36 3.24 ° i ii 25 13 37.0 334 35 8.7 343 4 47.3 35530 1.5 320 58 13.7 350 36 34.3 310 39 40.8 25 13 38.1 334 35 10.1 355 19 50.3 320 58 5.5 350 26 23.5 310 38 24.2 25 12 24.8 334 34 59.3 343 4 31.9 355 19 46.4 320 58 0.4 350 36 21.5 310 46 52.7 25 12 24.6 334 34 56.8 343 4 37.8 355 19 53.4 330 58 5.0 350 36 24.1 310 54 56.3 25 12 28.1 334 34 59.4 343 4 34.0 355 19 50.4 320 £8 5.0 350 26 21.1 311 16 16.9 334 34.58.2 320 58 0.4 311 4220.8 334 34 53.1 355 19 44.9 320 57 57.2 311 59 48.3 350 26 15.4 320 58 0.3 311 58 10.7 / // -f- 25.48 — 25.71 16.43 4.42 43.55 9.07 — 1 2.92 -f. 25.32 — 85.52 4 44 43.87 9.11 — 1 03.83 -f- 25.40 — 25.64 16.43 4.42 43.64 9.05 — 1 2.00 + 25.12 — 35.34 16.15 4.34 42.74 8.87 -1 0.60 + 24 71 - 34.95 16.47 4.43 43.87 9.11 1 1.35 25.53 43.79 1 0.53 35.68 4.66 43.95 1 0.09 9.12 43.96 -1 0.33 // + 5.5 3.4 19.9 31.6 14.3 16.5 ' ' 18.7 19.6 +17.7 • +26.1 86.4 26.6 26.9 27.6 +38.4 —27.8 +27.3 * / // -58 39 33.87 8 1 14.38 10 31 0.16 -38 46 26.37 + 5 36 0.56 -33 52 54.53 +16 4 26.73 -58 39 32.71 — 8 1 13.87 -38 46 31.65 + 5 35 55.58 —2353 0.18 + 15 55 35.44 -58 39 35.99 8 1 19.45 16 31 2.96 —28 46 29.47 + 5 35 55.75 —23 52 59 94 f 15 46 55.21 —58 39 37.21 8 1 18.95 16 31 1.84 —28 46 28.25 + 5 35 57.55 —23 52 55.42 +15 38 57.21 -58 39 33.00 8 1 14.64 16 30 59.92 -28 46 28.36 + 5 35 56.48 -23 52 54.38 +15 17 34.46 - 8 I 15.06 + 5 3558.80 +14 51 26.73 — 8 1 12.01 -28 46 25.73 + 5 36 1.26 +14 34 54.10 -23 52 48.77 + 5 36 0.17 f 14 35 38.63 G. O. G. G. G. G. G. G. a Canis Maj. . . . £ Canis Maj. . . , a Canis Min. . . . Venus . . . N.L. c Canis Maj. . . . a Canis Min. . , . Venus . . . N.L. a Canis Maj. . . . e Canis Maj. . . . a Canis Min. . . . Venus . . . N.L. a Hydra; .... a Canis Maj. . . . c Canis Maj. . . a Cants Min. . . . 15 Argus Venus . . . N.L. a Canis Maj. . . . c Canis Maj, . . , a Canis Min. . . . \VniiR . . . N.L. a Canis Min. . . . Venus . . . N.L. e Canis Maj. . . . a Canis Min. . . . Venus . . . N.I... 7 36 19.80 a Stars blurred and unsteady. After observations, lifted the circle, and cleaned pivots and friction-rollers. h Vemis extremely unsteady ; stars sometimes good. Micrometers B and C were changed before observations. c Venus very unsteady and not satisfactory; stars sometimes good. (( Except of a Canis Minoris, the observation** generally were satis- factory. e The southern cusp of Venus was FO indistinct that tbe measure of her diameter is doubtful. /Venus quite steady. £ 15 Argus not visible at times, and the observation not to lie relied on. 330 MERIDIAN CIRCLE OBSERVATIONS, 1852, i ^ I — ' ~ -75 Corrections for . I Date. Object. 1 7 | Apparent Circle reading, A. H. mean of lour observed. microscopes. Hefrac- tion. Nadir. Observed i .£ apparent i g ~s declination. > e s~ E 'i. Inst. Clock. , 1 I 1852. ''• m ri. p. s. h. m. s. . / // / H // // oil! 1.. 30.66 +0.380 — 17.235 ; 8 1 13.81 i 350 26 14.2 — 9.13 . . . —23 52 48.66 G. • 34.91 .526 17.176 9 20 18.26 i 334 34 53.4 25.63 . . . . 8 1 11.36 3 30 a Canis Miij. ... 6 38 52.71 .460 16.027 6 38 37.15 343 4 26.9 16.44 +21.0 . . 16 30 57.35 G. 4 c Canis Maj. ... 6 53 3.54 .347 16.015 ' 6 52 47.87 ! 355 19 41.3 4.42 . . 1 . . —28 46 23.77 5 Venus . . . N.L. 7 34 26.87 .712 15.981 ; 7 34 11.60 31 1 56 53.3 59.92 . . '+27.0 +14 36 52.73 6 15 Argus 81 29.47 .395 15.958 8 1 13.91 350 26 13.7 9.08 . . —23 52 51 .51 i -h 31 a Canis Maj. .'. . 6 38 51.76 .446 15.003163837.20 343 4 29.1 16.40 18.7 . . —16 30 57.29 0. 8 e Canis Maj. ... 6 53 2.64 .332 14.992 6 52 47.98 355 19 44.1 4.42 . . . . —28 46 24.27 1 Venus . . . N.L. 7 32 42.23 .702 14.961 7 32 27.97 311 55 13.1 59.91 . . 26.8 +14 38 35.42 We Aug. 4 a Cam's Maj. . . . 63847.13 .575 10.514 63837.19 343 4 29.5 16.51 19.8 . . —16 30 58.68 G. 11 c Canis Maj. . . . ! 6 52 58.10 .471 : 10.503 6 52 48.07 355 19 41.0 4.44 . . l . . —28 46 22.25 13 Venus . . . N.L. 7 27 15.66 ! .809 10.477 7 27 5.99 311 46 6.8 1 0.40 . . | 25.6 +14 47 42.31 13 0 Geminorum . . .73624.40 .925 10.469 7 38 14.86 298 12 12.3 1 40.20 . . +28 22 42.21 14 23.64 .514 10.450 8 1 13.70 350 26 13.5 9.07 . . . . —23 52 50.12 154 5 s Canis Maj. ... 6 53 57.01 .362 9.286 6 52 48.09 355 19 42.4 4.39 16.9 . . -28 46 20.80 G. 16 Venus . . . N.L. 7 26 18.50 .639 9.257 ' 7 26 9.88 311 43 16.4 1 0.20 . . 25.3 +14 50 35.71 17 ,. •' Geminorum . . . i 7 36 23.33 .734 9.249 j 7 36 14.82 298 12 12.7 1 39.62 . . . . +28 22 44.13 18 22.80 .381 9.228 8 1 13.95 350 26 15.0 8.99 i . . —23 52 48.80 19 e 6 « Canis Maj. . . . i 6 52 55.57 i .379 8.005 65247.98 355 19 41.9 4.39 17.0 . . —28 46 20.40 G. 'JO Venus . . . N.L. 7 25 30.94 .782 7.975 7 25 23.75 311 40 14.6 1 0.09 . . 25.0 +14 53 37.60 21 a Canis Min. ... 7 31 40.30 .729 7.969 7 31 33.06 320 57 59.9 43.36 . . . . 5 36 0.57 23 21.46 .431 7.943 8 1 13.95 S3/ 7 Venus . . . N.L. 7 24 53.27 .752 6.488 7 24 47.53 311 37 5.4 59.82 15.7 24.7 14 56 48.13 G. 34 a Canis Min. ... 7 31 38.70 .690 6.481 7 31 32.91 320 58 2.0 43.02 . . . . + 5 35 59.43 35 15 Argus .81 19.93 .383 ! 6.429 8 1 13.88 350 26 17.0 8.95 . . —23 52 49.64 8 Venus . . . N.L. 7 24 35 30 .669 4.682 7 24 21.29 311 33 44.9 59.71 13.9 24.4 +15 0 10.62 G. 27 a Canis Min. ... 7 31 36.97 .581 4.672 7 31 32 88 320 58 2.8 42.97 . . 5 36 0.38 28 /? Geminorum . . . • 7 36 18.57 ! .630 4 667 7 36 14.73 298 12 15.7 1 38.44 . . !+28 22 42.95 29 15 Argus 81 18.33 ' ,252 4.636 8 1 13.95 350 26 17.4 8.91 . . —23 52 48.28 Mi 10 Venus . . . N.L. 7 23 59.04 .749 1.195 7 23 58.59 311 26 48.3 1 1.24 15.1 23.7 +15 7 8.25 G. 31 a Canis Min. ... 7 31 33.41 .683 1.185 7 31 32.91 32058 1.2 43.77 . . . 5 36 1.58 33 0 Geminorum ... 7 36 15.10 i .891 — 1.180 7 36 14.81 298 12 14.5 1 40.22 . . . . +28 22 44.73 33 i 13 c Canis Maj. ... 6 S3 46.19 .366 + 1.656 6 52 48.21 355 19 42.6 4.48 17.7 . . —28 46 21.71 G. 34 Venus . . . N.L. : 7 34 12.46 .820 , 1.685 7 24 14.96 311 19 31.3 1 2.06 22.8 +15 14 24.37 35 a Canis Min. ... 7 31 30.53 .752 1.693 7 31 32.96 320 58 1.4 44.27 . 5 35 59.38 36 0 Geminorum ...73*; 12.23 .969 1.696 7 36 14.89 298 12 17.0 1 41.27 . . +28 22 40.68 37 15 Argus . . 81 11.90 .425 1.720 8 1 14.05 350 26 12.2 9^17 . . 23 52 46.62 38k 13 Venus . . . N.L. 7 24 33.36 .821 2.997 7 24 37.18 311 15 53.7 1 1.07 14.0 22.4 +15 18 5.08 G. 39 a Canis Min. ... 7 31 29.34 .753 3.002 7 31 33.09 320 58 0.7 43.46 . . 5 36 2.87 40 0 Geminorum . . . i 7 3f 11.11 .969 ! 3.007 7 36 15.09 298 12 16.0 1 39.51 . . . . 28 22 43.62 41 1 14 Venus . . . N.L. 7 25 3.26 .759 4.443 I 7 35 8.46 311 12 17.7 1 0.37 +12.4 +22.0 15 21 42.38 G. 43 a Canis Min. ... 7 31 27.87 .671 4.449 7 31 3J.99 320 58 2.8 42.89 . . 5 36 1.80 43 0 Geminorum ... 7 3f 9.51 +0.921 : + 4.455 7 36 14.89 298 12 17 5 —1 38.26 . . . . +28 22 42.47 a Transit of 15 Argus observed through clouds. e All good observations. b Objects extremely tremulous. A The dense fog covering the city since yesterday morning broke c Objects tolerably sharp and steady. d All tolerably good observations. e Observations through thin cirri, but good, unless the cusps of Venus were not sharp enough for accurate measurement of the diameter. / Objects rather tremulous and unsteady. away suddenly at7A. sidereal time. Objects in this day's obser- vations blurred and very unsteady. i Objects tremulous. k Objects quite steady. 1 Cirri rendered cusps dim ; objects not steady. AT SANTIAGO DK CHiLK. 32.11 ai .t: = = - li Corrections lor 5 t , ~ o Apparent Circle reading. Refrac- Nadir. s Observed E Date. Object. — -c '£ A. R. mf.-in of linn tion. j5 apparent jj 1 \\$ Inst. Clock. observed. microscopes. „= declination. « 6 .= £3 2 0 I S 1853. h. in. 8. s. s. h. m. s. o / /; / u n u • / n la Aug, 16 Venus . . . N.L. 7 26 29.43 +0.779 + 7.869 7 26 38.08 311 5 12.6 -1 1.03 +12.8 +21.4 +15 28 48.34 G. a a Canis Min. . . . ' 7 31 24.53 .666 7.874 7 31 33.07 33058 1.7 — 43.14 . . . . + 5 36 9.75 i 36 21 a Argus 6 20 24.03 .641 15.241 6 20 39.91 19 9 44.3 -L Ifl M 1.1 9 —52 36 45.45 n 4 a Canis Maj. ... 6 38 21.87 .560 15.257 6 38 37.69 343 4 28.7 — 16.91 .... -16 30 53.58 S Venus . . . N.L. 7 32 30.43 .951 15.303 7 33 46.68 310 49 6.9 1 3.75 \ . . 19.8 +15 44 55.26 g 15 Argus 80 58.36 .462 15.329 8 1 14.15 350 26 11.9 9.25 . . . . —23 53 44.44 22 o Canis Maj. . . . ' 6 38 20.69 .467 16.461 6 38 37.62 343 4 27.9 16.61 , 14.3 . . 16 30 51.48 ; G. 8 \ t Canis Maj. . . . 6 52 31.60 .313 16.477 6 52 48.39 355 19 40.0 4.46 . . . - -28 46 15.73 9 Venus . . . N.L. 7 34 5.88 .825 : 16.516 7 34 23.22 310 46 22.0 1 2.61 . . 19.5 +15 47 40.92 10 15 Argus 8 0 57.31 .378 4. 16.537 8 1 14.22 350 26 12.9 9.07 23 52 44.02 11 d 23 e Canis Maj. . . . 6 53 1.49 .262 — 13.344 6 53 48.41 355 19 41.6 4.46 14.4 -28 46 17.43 G. 12 a Canis Min. . . . 7 31 19.83 .693 + 12.590 7 31 33.11 320 58 2.6 44.07 + 536 1.18 13 Venus . . . N.L. 7 35 53.28 .794 + 12.590 7 36 6.38 310 43 52.0 1 3.04 • • 19.2 +15 50 11.55 Ui 28 a Canis Maj. ... 6 38 37.46 .462 — 0.189 6 38 37.73 343 4 34.3 16.55 16.7 . . —16 30 50.34 G. 15 « Cams Maj. ... 6 52 48.40 .328 0.180 6 52 48.55 355 19 37.3 4.45 . . -28 46 15.44 16 | a Canis Min. ... 7 31 32.79 .674 0.161 7 31 33.30 320 57 57.9 43.91 . . . . + 5 36 3.42 17 /? Geminorum . . . 7 36 14.57 .854 0.158 7 36 15.26 298 12 14.5 1 40.55 . . 38 22 43.46 18 Venus . . . N.L. 7 46 23.21 .734 0.153 7 46 33.79 310 34 48.3 1 3.00 . . 17.8 +15 59 14.31 19 15 Argus .... 8 1 14.01 .394 — 0.145 8 1 14.26 SO/ 31 a Canis Maj. . . . 6 38 34.17 .504 + 3.136 6 38 37.81 Vl3 4 23.7 16.86 17.4 -16 30 50.13 G. 31 ( Canis Maj. ... 6 52 44.99 .438 3.151 6 52 48.57 355 19 37.4 4.52 . . . . -28 46 16.17 33 o Canis Min. ... 7 31 29.53 .692 3. 183 7 31 33.40 320 57 59.3 44.64 . . . . + 5 36 2.05 33 ^Geminorum . . . 73611.26 .828 3.189 7 36 15.28 298 12 18.8 1 42.03 . . . . 28 22 39.94 94 Venus . . . N.L. 7 53 40.70 .730 3.202 7 53 44.63 310 32 55.8 1 4.11 16.9 +16 1 8.12 25 8 1 10.73 .430 3.209 8 1 14.37 350 26 9.0 9.26 —23 52 43.03 Sept. 1 £ Canis Maj. . . 6 52 43.79 .424 4.453 6 52 48.67 355 19 34.9 4.53 18.3 -28 46 14.57 G. S7 a Canis Min. . . . 7 31 28.24 .801 4.486 i 7 31 33.53 320 57 57.0 44.50 . . + 5 36 3.31 28 /? Geminorum ... 7 36 9.93 1.002 4.491 : 7 36 15.42 298 12 14.8 1 41.95 . . . . 28 22 42.96 H Venus . . . N.L. 7 56 16.94 .867 4.508 7 56 22.31 310 32 58.9 1 3.79 . . 16.7 +16 1 4.00 30 15 Argus 8 1 9.40 .479 4.513 8 1 14.39 350 26 8.1 9.32 —23 53 43.07 31 A 2 a Canis Maj. . . . 6 38 31.69 .478 5 757 6 38 37.92 343 4 25.3 | 16.69 15.5 . . 16 30, 50.00 G. 32 £ Canis Maj. . . . 6 52 42.66 .335 5.772 6 52 48.77 355 19 37.8 | 4.49 . . . . —28 46 14.70 33 a Canis Min. ... 7 31 26.99 .716 5.805 7 31 33.31 320 57 59.0 , 44.19 . . . . + 5 36 3.80 34 /? Geminorum . . . 7 36 8.69 .960 5.810 7 36 15.46 298 12 17.2 1 41.23 . . . . . 28 22 42.64 35 Venus . . . N.L. 7 58 58.04 .813 5.828 7 59 4.68 310 33 23.8 1 3.47 • • 16.5 +16 0 41.78 36 i 3 e Canis Maj. . . . 6 52 41.30 .327 7.019 6 52 48.64 355 19 40.6 4.45 13.5 -28 46 15.54 O. 37 a Canis Min. . . . j 7 31 25.66 .725 7.058 7 31 33.44 320 58 1.6 43.93 . . + 5 36 3.94 38 (S Geminorum . . . 7 36 7.44 .956 1 7.063 7 36 15.46 298 12 19.0 1 40.67 . . . . 28 25 42.23 39 Venus . . . N.L. 8 1 43.90 .808 7.068 8 1 51.78 310 34 13.7 1 3.96 16.3 +15 59 53.57 40* Sept. 6 e Canis Maj. . . . 6 52 37.88 .385 10.466 6 53 48.73 355 19 37.4 4.53 +16.4 , . -28 46 15.17 G. 41 a Canis Min. . . . 7 31 32.30 .770 10.500 7 31 33.57 330 57 58.8 44.59 . . . . + 5 36 3.50 43 0 Geminorum ... 7 36 3.91 .984 10.506 7 36 15.40 298 13 17.6 1 42.18 . . . > 38 23 42.39 43 Venus . . . N.L. 8 10 28.28 +0.843 + 10.540 8 10 39.66 310 38 57.6 — 1 3.75 +15.7 +15 56 8.16 a Observations through cirri ; objects tolerably ster dy. f Bad ira ages, though tolerably steady. b Objects very tremulous and unsteady. g Tolerably steady. c Objects excessively unsteady. h Comparatively quite steady. il The clock having stopped at 7A., dismounted and cleaned it after i Objects tolerably steady. observations. k Objects sharp, and planet comparatively steady. Aperture re t Bad images, but tolerably steady. (lueed lo two inches for planet. 332 MERIDIAN CIRCLE OBSERVATIONS, 1852. 0> s 19 C V £ S Corrections for 1 E *•• o Apparent Circle reading, Refrac- Nadir. m Observed Date. Object. 111 A.R. observed. mean of four microscopes. tion. 1 Zi apparent declination. i _ !_ — > Inst. Clock. : v J2 W **• C 2 S O o 1852. b. m. s. s. s. h. m. s. o ' 1 / /, it II ° i a la Sept. 7 < Canis Maj. . . . 6 52 36.43 +0.403 + 11.892 6 52 48.72 355 1939.1 4.50 +15.9 —28 46 16.39 G. 3 a Canis Min. . . . 7 31 20.83 .932 11.928 7 31 33.69 320 58 0.8 44.24 + 5 36 1.61 S3 >' Geminorum . . . 7 36 2.29 1.245 11.934 7 36 15.47 298 12 19.1 1 41.32 . . 28 22 40.43 4 Venus . . . N.L. 8 13 30.83 1.047 11.969 8 13 43.85 310 41 21.2 1 2.94 • • +15.5 + 15 52 44.45 So 8 r Canis Maj. . . . 6 52 35.24 .359 13.312 6 52 48.91 355 19 39.9 4.45 +14.5 —28 46 15.84 G. 6 a Canis Min. . . . 7 31 19.50 .898 13.348 7 31 33.75 320 57 59.7 43.81 + 5 36 3.72 7 fj Geminorum . . . 7 36 1.16 1.224 13.354 7 36 15.74 298 12 19.0 1 40.29 28 22 40.90 8 Venus . . . N.L. 8 16 37.46 +1.019 + 13.394 8 16 51.87 310 44 9.8 — 1 2.34 +15.3 +15 49 56.85 a Objects sharp, but very tremulous. Aperture for all, two inches. HORIZONTAL AND VERTICAL DIAMETERS MARS AND VENUS, DIFFERENTIAL AND MERIDIAN OBSERVATIONS, AT SANTIAGO DE CHILE, COMPARED WITH THE NAUTICAL ALMANAC. DIAMETERS OF MARS: 1849-50. Date. Observed horizontal. N. A. horizontal. I Observed Observed N. A. — N. A. . vertical. vertical. Observed — N.A. ver. Remarks. 1849. /, // ,/ • // // ii Dec. 10 17.06 17.10 —0.04 15.88 I 15.40 +0.48 Blazing and unsteady. 11 13.42 17.07 —3.65 20.07 15.36 4.71 Mars not very steady. 11 18.16 17.07 +1.09 16.86 15.36 1.50 Do. 11 . . 18.27 15.36 2.91 Do. 12 24.73 17.04 7.69 19.86 15.32 4.54 Not favorable. 12 21.22 17.04 4.18 18.18 15.32 I.M 13 20.59 17.01 3.58 18.28 15.28 3.00 Pretty fair measures. 14 22.65 16,97 5.68 17.94 15.94 2.70 Not as good as yesterday. 15 18.64 16.94 . 18.71 15.20 3.51 By no means satisfactory. 15 19.14 16.94 +2.20 18.91 15.20 3.71 16 15.91 16.91 —1.00 17.99 15.17 2.82 Tolerably good, but occasional wave-like motion. 17 18.00 16.88 +1.12 15.82 15.13 0.69 Uniformly good measures. 18 19.19 16.85 2.34 16.44 15.10 1.34 Disc of planet badly defined. 20 20.12 16.83 3.29 16.76 15.03 1.73 Badly denned and wavy a part of the time. 20 20.34 16.83 +3.51 16.04 15.03 1.01 21 18.15 16.80 —0.65 19.22 | 15.00 4.22 Both objects seen through haze. 22 23.78 16.73 +6.05 18.16 14.93 3.33 Blazing and unsteady. 23 19.79 18.65 3.14 17.21 14.86 2.35 Very flaring, with irregular motion. 24 17.16 16.57 0.59 17.86 14.80 3.06 Generally very good measures. 25 17.29 16.50 0.79 17.02 14.73 2.29 Tolerably fair night. 26 18.82 16.44 2.38 17.76 14.66 3.10 Better than usual. 27 17.69 16.39 1.30 17.78 ; 14.60 3.18 Blazing and unsteady. 30 21.91 16.20 5.71 17.48 14.40 3.08 Quite a favorable night. 31 17.1)1 16.10 1.84 16.79 14.20 2.59 Doubtful, because of ihe vicinity of the objects in A. R. 1850. Jan. 1 18.82 16.00 2.82 17.85 ! 14.11 3.74 Better results than usual. 2 19.05 15.90 3.15 17.40 14.02 3.38 Measures doubtful fiom several causes. 4 18.96 15.60 3.36 17.12 13.84 3.28 Not favorable, though pan of the measures good. 6 18.74 15.30 +3.44 17.16 13.66 3.50 Not satisfactory results. 6 14.61 15.30 —0.69 16.65 13.66 2.99 7 16.72 15.15 +1.57 18.01 13.60 4.41 Variable in value. 8 18.0:! 15.00 3.02 17.64 13.40 4.24 Very fair niglu'swork. 9 19.18 14.85 3.33 16.71 13.40 3.31 Same as yesterday. 10 19.56 14.70 4.86 16.92 13.20 3.72 i Regarded as about the mean. 11 17.68 14.55 3.13 16.15 13.20 2.95 Measures more accurate than usual. 12 16.40 14.40 2.00 15.98 13.00 i 2.98 Generally very good measures. 13 17.24 14.30 2.94 17.93 13.00 ' 4.93 Do. do. 14 17.57 14.20 3.37 15.99 12.80 : 3.19 ; Planet flaring and unsteady. 15 18.93 14.10 4.83 16.40 12.80 3.60 ]' Very fair observations throughout. 15 16.71 14.10 Si. 61 13.74 12.80 0.94 16 18.35 14.00 4.35 16.33 12.60 3.73 Flickering light and unsteady motion. 17 17.00 13.90 3.10 16.50 12.50 4.00 Moderately fair observations. 18 16.41 13.80 2.61 17.14 12.40 4.74 Very unfavorable night. 19 15.74 13.70 2.04 15.65 12.20 3.45 Only one measure. 20 14.32 13.60 0.72 13.47 12.20 1.27 An extremely good night, ami reliable measures. 21 17.11 13.50 3.61 15.23 12.00 3 23 Measures not satisfactory. 22 15.76 13.35 2.41 14.10 12.00 3.10 Regarded extremely satisfactory. 23 23 14.70 14.45 13.20 13.20 1.50 +1.25 14.22 11.80 13.65 11.80 2.42 1.85 Nothing remarkable in measures. 24 12.62 13.10 -0.48 13.86 11.60 +2.26 | One of the very best nights. 1 336 DIAMETERS OF MARS, 1849-50. Date. Observed horizontal. N. A. horizontal. Observed — N. A. Observed vertical. N. A. verticul. Observed — N. A. ver. Remarks. 1850. ii if n ii // « Jan. 25 13.15 13.00 +0.15 13.09 11.40 +1.69 Measures generally very good. 26 13.93 13.90 1.03 15.25 11.40 3.8.5 Hazy night, and the star indistinct. 27 13.30 12.75 0.55 12.22 11.20 1.02 Sharp images, and satisfactory measures. 28 17.25 12.60 4.65 13.84 11.20 2.64 Star scarcely observable; observations discordant. 29 15 .33 12.30 3.03 12 77 11.00 1.77 Ordinarily fair results. 31 13.30 12.00 Mean of 54 observations +1.30 +2.349 12.42 55 obser 10.80 +1.62 +2.862 An extremely favorable night. DIAMETERS OF MARS, 1851-52. Date. Observed vertical. N. A. vertical. Observed — N. A. Obsi'rvd horizom'l. N. A. norizom'l. ihsi'rvrd — N.A. Remarks. 1851. Dec. 16 it 14.70 /; 11.20 n +3.50 /» 9.97 it 11.70 // —1.73 Early observations, images blurred and unsteady; latter sharp and 16 13.14 11.20 1.94 10.75 11.70 —0.95 steady. 19 13.61 11.40 +2.21 18.25 12.00 +1.25 At commencement of observations both objects flaring and unsteady; temperature falling; atmoi-pliere moist. The white zone about the 19 11.27 11.40 —0.13 15.26 12.00 3.26 north pole of Mars distinctly visible, and marked by a dark line. 19 12.58 11.40 +1.18 16.37 12 00 4 37 The zone apparenlly one-sixth diameter of planet. S8 14.62 12.20 2.42 17.61 12.90 4.74 Measures satisfactory. White zone not so dark. 29 12.61 12.40 0.21 14.94 13.20 1.74 At commencement images flaring and unsteady ; at the close excellent. 30 13.48 12.40 1.08 17.90 13.20 4.70 Fine night; images sharp and clear. 31 13.60 12.60 1.00 16.65 13.50 3.15 Same as last night. 1852. Jan. 1 13.85 1260 1.25 17.38 13.50 3.88 Fine night, and measures satisfactory. 2 14.10 ' 12.60 1.50 17.24 13.50 3.74 Same as last night. 4 13.96 12.80 1.16 17.66 13.80 3.86 Kurlier nlist'rvations images flaring and tremulous; latter steady; measures line. 5 12.85 12.80 0.05 10.17 13.80 1.37 No sharp images during the observations ; planet slightly tremulous all the time. 6 13.36 13.00 0.36 15.49 14.10 1.39 Both objects were sharp, but their images dim. 7 14.15 13.00 1.15 17.01 14.10 +2.91 Generally blurred and tremulous. 8 13.77 13.00 +0.77 13.86 14.10 —0.24 Objects badly defined and wavy. 8 12.90 13.00 —0.10 17.46 14.10 +3.36 9 13.43 13.00 +0.43 18.41 14.10 4.31 Night fair ; observations satisfactory, though both objects were wavy in motion. 10 14 14 13.20 0.94 17.10 14.40 2.70 Earlier observations images badly defined and unsteady ; afterward the objects were sharp and measures good. 11 14.55 13.20 1.35 15.75 14.40 1.35 Early part of night cloudy ; latter part clear ; measures very fair. 12 15.00 13.20 1.80 18.07 14.40 +3.67 Objects blurred and unsteady ; measures unsatisfactory until towards the 12 13.80 13.20 0.60 14.12 14.40 —0.28 close of the observations. 13 14.19 13.20 0.99 17.80 14.40 +3.40 Images blurred, flashing, and whirling. 14 14.44 13.40 1.04 15.90 14.40 1.50 Fine night ; satisfactory measures throughout. 16 13.84 13.40 0.44 17.54 14.70 2.84 At commencement objects indistinct and tremulous, but improving to- wards the close. 17 13.63 13.40 0.23 17.44 14.70 2.74 Objects well denned and steady throughout. 20 14.08 13.40 +0.68 17.74 14.70 3.04 Planet flaring; the measures, however, are tolerably fair. 20 13.26 13.40 —0.14 15.75 14.70 +1.05 21 15.10 13.40 +1.70 12.38 14.70 —2.32 Observations discontinued in consequence of haze obscuring the objects. 22 14.96 13.40 1.56 18.28 14.70 +3.58 Planet sharp and steady ; measures very fine. 23 14.74 13.40 1.34 17.45 15.00 2.45 Objects a little blurred and tremulous at times, but measures satisfactory. 24 15.02 13.40 1.63 19.06 15.00 4.06 Commencement, images blurred and unsteady; subsequently sharp and equable. 25 10.27 13.40 2.87 18.17 15.00 3.17 Generally ill defined and unsteady. 27 13.54 13.40 0.14 16.46 15.00 1.46 A very satisfactory night in all respects. 28 13.66 13.40 0.26 16.31 15.00 1.31 Not quite as good as last night. % 29 13.50 13.40 +0.10 16.96 15.00 +1.96 Fine night, but the measures are not very satisfactory. 30 13.04 13.40 —0.36 14.93 15.00 -0.07 Fine night ; large number of the measures doubtful, in consequence of the comparing star being not brighter than 11 or 19 J magnitude, and very dim under light. 31 13.18 13.20 —0.02 15.92 14.70 +1.22 Images excellent, instrument steady, and measures satisfactory. Feb. 1 13.27 13.20 +0.07 10.84 14.70 —3.86 The planet and star blurred ; the measures are, therefore, not good. 2 13.52 13.20 +0.32 16.59 14.70 +1.89 Fine night ; objects a little wavy, but measures very satisfactory. 3 13.19 13.20 —0.01 . Cirro strati all over the heavens ; objects indistinct and unsteady. 7 12.96 13.00 —0.04 18.03 14.40 3.63 Night nnfavnrahle ; images neither sharp nor steady ; measure not more limn fair. 8 13.35 12.80 +0.55 l.-,.72 14.40 1.32 Same as last night. 9 12.99 12.80 +0.19 15.92 14.40 + 1.52 Fine night; clean, steady images; measures satisfactory. 9 12.71 12.80 —0.09 14.38 14.40 —0.02 43 338 DIAMETERS OF MARS, 1851-52. Date. Ob.-fivt'd vertical. „., vertical. Observed — N.A. Observed fiorizont'l N.A. horizont'l Observed -N.A. Remarks. 1852. ;/ // ;/ // a // Feb. 10 12.79 12 60 +0.19 16.04 14.10 +1.94 Night excellent; images sharp and steady. 11 12.78 12.60 +0.18 18.14 14.10 +4.04 Same as preceding. 11 12.01 13.60 —0.59 13.51 14.10 —0.59 .. 13 11.79 12.40 0.61 15.09 13.80 +1.29 Images blurred and unsteady ; measures only tolerable. 13 12.34 12.40 0.06 15.54 13.80 1.74 14 12.03 12.40 —0.37 14.29 13.80 0.49 Star very indistinct at times, and the images blurred and wavy. 15 12.67 12.40 +0.27 14.68 13.80 0 88 Same remarks applicable as last night. 16 12.54 12.20 +0.34 15.17 13.50 1.67 Earlier observations images blurred and unsteady ; latter much better. 17 11.78 12.20 —0.42 14.73 13.50 1.23 At commencement images badly denned, motion nut uniform ; later they became better, and the work is very satisfactory. 19 11.46 12.00 0.54 14.32 13.50 0.82 Much haze; planet tolerably steady ; comparing star dim ; measures of it in many cases very doubtful. 20 11.51 11.80 0.29 15.56 13.20 2.36 Tlie evening good ; measures generally satisfactory. 21 11.53 11.60 0.07 14.70 12.90 1.80 Fine night ; images sharp and steady ; measures satisfactory throughout. 22 11.45 11.60 0.15 14.13 13.90 1.23 Blurred and unsteady ; measures but little better than guesses. 23 10.37 11.60 —1.23 14.38 12.90 +1.48 Sharp and steady. 24 11.49 11.40 +0.09 11.74 12.60 —0.86 Clean images and steady ; measures generally very fair. 25 10.98 11.40 —0.42 14.93 12.60 +2.33 Fine night; images clean and steady ; measures very fair. M 11.21 11.20 +0.01 13.21 12.60 +0.61 Very fine night ; no better images nor more satisfactory work. 27 11.12 11.20 —0.08 12.19 12.60 —0.41 Same as last night. 28 11.19 11.00 +0.19 9.34 12.30 —2.96 Much blurred and very indistinct ; measures not satisfactory. 38 10.60 11.00 —0.40 14.72 12.30 +2.42 29 10.07 11.00 0.93 13.72 12.30 +1.42 Owing to cirri, images blurred and unsteady; star often very indistinct. Mar. 1 10.46 10.80 0.34 11.02 12.00 —0.98 Generally sharp and good. 2 10.66 10.80 0.14 . Fine night ; images sharp and steady ; measures satisfactory. 3 10.41 10.60 0.19 . . Objects badly denned, and indistinct ; observations unsatisfactory. 4 9.96 10.60 0.64 13.16 11.70 +1.46 Night fine ; images steady ; measures satisfactory. 6 10.02 10.40 0.38 12.72 11.70 +1.02 Blurred and unsteady at commencement; subsequently better denned and sharper. 7 10.36 10.40 0.04 9.40 11.70 —2.30 Badly denned ; constant tremulous motion. 8 10.02 10.20 0.18 12.44 11.40 +1.04 Remarks of last night applicable. 9 9.70 10.20 —0.50 12.28 11.40 0.88 Unsurpassed in good definition and steady motion by any night during the series. 10 11.74 10.00 +1.74 12.56 11.10 1.46 Last night's remarks applicable. 11 9.72 10.00 —0.28 11.31 11.10 0.21 Same as last night. 12 9.60 9.80 0.20 11.44 10.80 +0.64 Good images ; satisfactory measures. 12 9.63 9.80 0.17 10.33 10.80 —0.47 13 9.27 8.80 0.53 . . Never better or steadier measures. 14 9.46 9.80 0.34 12.44 10.80 +1.64 Quite steady, but dim all the evening. 15 9.27 9.60 —0.33 10.38 10.50 —0.12 A blur about the planet and an unsteadiness of motion, somewhat im- pairs the observations. Mean of 81 observations . +0.379 77 observations . +1.504 VERTICAL DIAMETERS OF VENUS, 1850-51, Date. Mer. circle N. A. C — N. A. Equatorial N. A. E — N. A. Remarks. 1850. it ii „ „ „ u Oct. 19 29.88 28.88 +1.00 • 20 29.74 29.28 0.46 SI 31.28 29.64 1.C4 22 31.28 29.88 1.40 . Passing cirri. 23 31.84 30.28 1.56 24 31.28 30.68 6.60 25 31.56 31.32 +0.24 86 31.56 31.92 —0.36 2T 31.56 32.48 0.92 30 33.23 33.72 0.49 Nov. 1 33.33 34.72 —1.49 5 39.38 37.12 +2.26 7 38.12 38.12 ±0,00 8 39.66 38.72 + 0.94 10 42.45 40.12 2.33 . . . Seen through clouds. 11 43.7:! 40.72 2.01 13 43.57 42.16 1.41 14 15 44.68 42.92 1.76 45.18 43.72 +1.46 Mean of five measures at 22ft. 56tn. 16 4.).:,3 44.32 +1.20 17 44.54 44.96 —0.42 18 19 47.47 47.47 45.78 46.56 +1.69 0.91 48.55 46.73 1.82 Seen through cirri. Mean of four measures at 23A. 20m. 20 48.59 47.36 J.23 . Cirri passing all the time. 2L 50.13 48.12 2.01 23 52.93 49.60 3.33 . . Very unsteady. Observed by Lieut. MacRae. 26 52.93 52.16 0.77 27 53.34 52.92 0.42 2" 54.32 53.56 0.76 Dec. •> 59.48 56.76 2.72 4 58.37 58.12 0.25 Passing cumuli during the observation. 5 60.92 58.72 2.20 60.91 58.88 9.03 Mean of ten measures at OA. 30m. 8 61.72 60.32 1.40 f . Lieut. MacRae, observer. 10 65.07 61.28 3.79 , Do. do. 12 65.07 62.04 3.03 Do. do. 13 1851. 63.67 62.24 1.43 Lieut. MacRae, observer. Cusps badly defined and cres- cent very slender. Jan. 0 57.25 50.04 7.21 . 1 7 57.81 49.24 8.57 . . 8 9 11 11 53.62 54.46 52.50 47.75 48.48 47.84 46.24 45.44 5.14 6.62 6.26 2.31 • • • • All of these measures were made with an imperfect mi- crometer screw. It was so defective as to be regarded iis.'li'ss for tin: zone observations. They are not in- corporated in the mean result. 13 52.22 44.64 7.58 , . . . 11 24 52.78 43.84 +8.94 37.93 37.39 0.54 Menu of trn ni'M^ures at 13A. 15m., daylight. 26 . s t 37.56 36.19 0.37 Mean of ten measures at 13*. 10m. 27 t . f 35.88 35.60 0.28- Mean of ten measures at 13ft. 15m. H 36.60 3-1.99 1.61 Mean of ten measures at 13A. 30m. Feb. f, , f f 32.50 31.20 1.30 The observations generally good. 5 • • • • 31.93 31.18 +0.75 Mean of ten measures at 14*. 15m. 340 VERTICAL DIAMETERS OF VENDS, 1850-51. Date. Mer. circle. N. A. C — N. A. Equatorial. N. A. E — N. A. Remarks. 1P01. „ it , „ „ ii Feb. 6 . 32.40 30.80 +1.60 Very fine morning; good steady images. 6 , . 31.01 30.78 0.23 Mean of ten measures at 14*. 32m. 7 . 30.86 30.41 ^.45 Very fine morning ; clean, good images. 7 31.43 30.38 1.1)5 Mean of ten measures at 14*. 30m. 10 . 30.69 29.00 1.69 Observations generally good. 10 • • 29.49 28.98 0.51 Mean of ten measures at 144. 49m. Mean of 35 observations . +1.174 15 observations +1.046 VERTICAL DIAMETERS OF VENUS, 1852, Date. Mcr. Cir. N.A. C — N.A. Equat'l. N.A. E — N.A. Remarks. 1852. May 30 // 30.30 n 99.28 ii +1.02 // 26.77 it 29.33 n —2.56 There never was a sharp image. At transit, tremulous. 31 32.12 29.68 2.44 Seen through clouds. June 2 31 00 30.48 0.5-2 32.84 30.53 +2.31 Unsteady and blurred. At transit, excessively unsteady. 3 33.79 30.88 2.91 30.30 30.93 —0.57 Sharp images. At transit, very fair observation. 12 37.1-1 35.68 1.46 38.64 35.73 +2.91 Star very dim. 13 37.28 36.08 1.20 Very tremulous. 15 38.49 37.60 0.89 Sharp images. 22 43.29 41.70 1.59 43.16 41.81 1.35 Measures not very satisfactory. 23 43.85 42.56 1.29 46.99 42.69 +4.30 Sharp clean images. 24 43.98 43.10 +0.88 42.65 43.21 —0.56 Good images. 23 43.29 45.96 —a. 67 Seen through cirri. 29 46.64 46.72 0.08 Very unsteady. 30 47.20 47.36 0.16 July 1 47.89 48.12 0.23 Seen through cirri. 5 49.15 50.92 1.77 . . finite unsteady. 6 50.55 51.52 0.97 . . Fair observation. 7 50.83 52.12 1.29 . Quite unsteady. 8 51.11 52.72 —1.61 Extremely unsteady. 9 53.48 53.28 +0.20 . . Very unsteady and not satisfactory. 10 53.38 53.72 —0.34 55.53 53.83 +1.70 Mean of six measures at ISA. 54m. sid. time. 13 55.02 55.28 —0.28 Southern cusp so indistinct that it is doubtful. 29 57.25 54.52 +2.73 . . . . 30 55.15 54.08 1.07 60.31 54.20 6.11 Star badly defined. 31 55.85 53.52 2.33 56.89 53.60 3.29 Air full of moisture. At transit, very tremulous. 31 56.33 53.60 +2.73 Mean of five measures at 3ft. 17m. sid. time. Aug. 4 52.36 51.28 1.08 49.68 51.40 —1.72 Unsteady and blurred. At transit, tolerably sharp and steady. 4 54.65 51.40 +3.25 Mean of six measures at 3A. 23m. sid. time. 5 52.78 50.68 2.10 Good observation. 6 51.94 50.08 1.86 . . . . Through thin cirri, but quite sharp 'and steady. Cusps not quite clean. 7 52.50 49.48 3.02 . . Rather tremulous. H 51.66 48.84 2.82 45.35 49.00 —3.65 Very indifferent* 10 49.99 47.40 2.59 . . 12 48.31 45.64 2.67 46.96 45.82 +1.14 Good measures. At transit, tremulous. 12 47.91 45.80 2.11 Mean of six measures at 3h. 49m. sid. time. 13 50.41 44.84 5.57 46.54 44.97 1.57 Not very satisfactory. At transit, quite steady. 13 . . 48.43 44.97 3.46 Mean of six measures at 3h. 46m. eid. time. 14 46.22 44.08 2.14 Cirri rendering cusps dim. 16 44.82 42.88 1.91 45.48 42.99 3.49 Cirri. Star dim. At transit cirri, tolerably steady. 16 43.68 42.97 0.71 Mean of six measures at 3ft. 53Jm. sid. time. 21 42.87 39.68 3.19 41.62 39.79 +1.83 Fine observations. At transit, very tremulous. 21 . 38.92 39.78 —0.86 Fine observations. 21 41.63 39.77 +1.86 Mean of six measures at 4A. 14m. sid. time. B 43.15 39.08 4.07 .'19.70 39.19 0.51 Very badly defined. At transit, excessively unsteady. 23 42.17 38.52 3.65 41.36 38.59 2.77 Very unfavorable morning. At transit, unsteady and clouds. 28 37.98 35.68 2 30 38.66 35.78 2.88 Images badly defined. At transit, same ; tolerably steady. 31 36.58 33.92 3.66 . . Bad image, but tolerably M>M h . Sept. 1 36 86 33.48 3.38 38.05 33.58 2.47 Good observations. At transit, tolerably steady. 1 . . t M.SJ 33.59 0.63 Mean of six measures at 4tt. 42m. sid. time. 2 35.75 32.96 2.79 36.38 33.00 3.38 Blurred. At transit, quite !.ti-:uly. 3 35.33 32.68 2.65 33.83 32.78 1.05 Unsteady and blurred. At transit, tolerably steady. 6 33.37 31.32 2.0-. 31.73 31.38 0.35 Ci'iirrally satisfactory. At transit, quite steady and sharp. 7 33.23 30.92 2.31 33.03 30.99 2.04 l'n>ir;ulv and badly defined. At transit, sharp, but unsteady. 8 32.67 30.52 2.15 31.82 30.58 -f-l.M Unsteady. At transit, excessively unsteady. 13 29.60 28.52 + 1.08 • • Tolerably steady. Mean of 45 observations . +1.505 34 observations . +1.512 MARS AND VENUS, U. S. NAVAL OBSEBVATORY, WASHINGTON, LIEUT. M. F. MAURY, LLD., SUPERINTENDENT. MICKOMETKICAL MEASURES WITH THE FOURTEEN FEET EQUATORIAL THE OPPOSITIONS OF MAES AND INFERIOR CONJUNCTIONS OF VENUS IN THE YEARS 1849—1852. LETTER FROM LIEUTENANT.MAURY, U. S. OBSERVATORY, WASHINGTON. SIR : I have the pleasure to enclose you herewith the observations made at this establishment in connection with your Astronomical Expedition to Chile. They relate to Venus and Mars, and were made with the large equatorial by Mr. Ferguson. The accompanying letter from him to me, descriptive of the method of observing and reducing, contains, it is believed, all the explanations necessary. I have not had the force to spare for copying these observations ; I will, therefore, be obliged to you if, when you are done with them, you will return the originals to this office. Kespectfully, &c., M. F. MAURY. Lieut. J. M. GILLISS, Astronomer of Expedition to Chile, Washington. UNITED STATES NAVAL OBSERVATORY, May 1, 1855. SIR : I herewith present journals of observations, and reductions of the same, of Mars and Venus, made in conformity with your instructions, and intended to be used in connection with observations of the same planets made in Chile under the direction of Lieutenant James M. Gilliss, for a more accurate determination of the parallax of the Sun. You will remember that early in December, 1849, after Mars had been observed several times and under different atmo- spherical circumstances, I stated to you that, from a discussion of the results of the compari- sons already made, it was very evident that few of them would be available for the purpose intended, as at that season of the year the planet would but seldom be susceptible of sufficient definition to admit of the requisite accuracy of comparison. At the same time, I requested to know from you whether observations should be limited to such times as afforded reason- able hope of available results, or whether you wished me to observe without reference to cir- cumstances. In answer, I was directed to observe whenever the planets were visible — this instruction applying equally to Venus and Mars. In consequence, observations have been made, and are now presented, which were not expected at the time to possess the requisite precision, and whose value can only be estimated by the character of the results derived from them. The following description of the method of observing ; the state of the instrument ; its adjustment, and the value of the revolution of the micrometer, will supply all the information not given in the record of each observation. The observations were made by myself, without any assistant ; the circle of declination being clamped so as to bring the compared objects in the middle of the field, and the polar ;ixis left altogether free; the position of the instrument being sufficiently assured by its weight. 44° 346 INTRODUCTION TO THE The times were read from a chronometer placed near the observer. In the winter months the doors and windows were left open, and every precaution taken to equalize the internal and external temperatures. This condition could not often be perfectly obtained — it being impos- sible, in cold weather, to exclude entirely the heat from the lower part of the building. The external and internal temperatures are given at each observation ; and, in addition to such remarks as were deemed essential to designate the state of the atmosphere, there is given opposite each series an abstract estimate of its quality, shown by the figures following the letter A ; A 10 signifying the most perfect condition. The chronometer used was compared with the standard clock of the Observatory immediately before the commencement of each series of comparison. A sidereal chronometer was used until October 12, 1850, and after that time a mean-time chronometer. In the reduction of the observations subsequent to October 12, 1850, the quantity A t applied to the differences in right ascension expresses the correction necessary to reduce the mean to the sidereal interval. The adjustment of the instrument was verified by observations of standard stars at proper intervals ; the deviation of the polar axis in elevation, or in azimuth, never exceeding 30 seconds of arc. The state of the adjustment is sufficiently indicated by the micrometer readings to the same fixed star. The value of a revolution of the micrometer used in the reductions is 15". 3717. It has been determined by transits of stars within 20° of the pole, and by measured distances between well determined stars of the Pleiades. The following table designates the character of the observa- tions upon which the value adopted here depends : Date. Objects. Temp. Rev. No. comp. Part of scale. A. 1849. » /; Oct. 11 y Cephei 15.38570 18 10 to 70 10 Feb. 5 17 Tiiuri 20 g. Maia 27 .37036 20 10 to 70 6 11 4— 10 Pleiades . 42 .43579 10 37.6 to 55.7 7 IS Do . . 47 .41936 16 27.9 to 45.2 7 17 Do . . 40 .36391 10 26.7 to 45 10 22 16 g. 20 G Pleiad. 47 .35176 10 36 to 55 9 23 Do . . 43.5 .36641 25 36 to 55 9 25 Do . . 56.7 .36621 20 31 to 50 10 26 Do . . 60 .39244 12 28 to 57 10 Mar. 1 Do . . 56 .38025 8 23 to 43 7 4 Do . . 40 15.36749 14 42 to 61 8 For the final value (15.37168) the mean was token, rejecting the observations of February 11 and 12. No attempt has been made to introduce a correction for temperature. At the commencement of the observations, the micrometer contained three transit wires, and a declination wire upon one slide, and three declination wires upon the other ; the latter slide being the one moved by the micrometer screw ; the transit wires being designated by the letters A, B, C, and the central wire on the same slide by /. The three declination wires on the other slide are designated by the numbers 1, 2, 3 ; No. 1 being next to the micrometer screw-head. After December 18, 1851, five declination wires were introduced instead of three ; numbered as in the first arrangement. The values of the intervals between the declination wires were as follows : Rev. From November 1, 1849, till March 12, 1850 .... 1—2 = 30.151 2 — 3 = 29.913 1 — 3 = 60.064 From October 1,1650, till November 1,1850 . . . . 1 — 2 = 30.142 2 — 3 = 29.947 1—3 = 60.089 •WASHINGTON OBSERVATIONS. 347 Rev. From November 1, 1850, tillJnnuarj' 10, 1851 . . . 1—2 = 30.319 2 — 3 = 29.870 1 -3 = 60.089 From January 16, 1851, (111 March 1,1851 1—2 = 30.179 3 — 3 = 29.936 1 — 3 = 60.115 After December 18, 1851, the wires were unchanged, having the following intervals: Rev. 1 — 5 = 60.149 ' 1—4 = 42.997 1 — 3 = 30.091 1—2 = 17.113' In observing, the inner side of the wire was brought into contact with the limb of the planet, so that the measured diameters are too great by the thickness of the wire. This thickness may be taken for all the wires at 0".432 ; a value determined by the interval between the centres of two wires brought to touch each other, using the highest magnifying power of the telescope. At the commencement of the observations of Mars in 1849, the declination wires were brought into contact with both limbs of the planet at each comparison ; and that a similar result might be obtained from the transits, the preceding limb was observed on A and 0, and the following on B. This practice was discontinued in the subsequent observations. The power of the eye-piece used, unless where otherwise noted, was 120. The headings of the different columns in the record of observations sufficiently explain their contents. In reducing the observations, the mean differences of right ascension and declination have been taken as the true differences of these quantities at the mean of the chronometer times. For this epoch, the correction to the chronometer and the correction for differential refraction (//?) have been given. In the final discussion of the observations, it will doubtless be necessary to select from the comparisons, and consequently to adopt other means than those used in this preliminary reduction. The corrections to the observations of Venus, necessary on account of defective illumination, have not been computed. Very respectfully, your obedient servant, J. FERGUSON. MATTHEW F. MAURT, LL. D., Lieut. U. S. N. , and Superintendent of the Naval Observatory. OPPOSITIONS OF MAES, 1849-52. MICROMETKICAL OBSERVATIONS, WITH THE 14 FEET EUUATOKIAL, AT THE NAVAL OBSERVATORY, WASHINGTON. OPPOSITION OF MARS, 1849-50. NAVAL OBSERVATORY, WASHINGTON. NOVEMBER H, 1849. No. for reference. Object. Chron'r time of transit. Mean of wires Micr. Mars — Star. Bar. Thermometers. A. B. C. A a. A<5. Alt. Int. Ex. 8. 8. «. h. m. s. Rev. m. «. Bev. Inches. « 0 • 1 3 3 4 5 6 7 8 9 10 11 19 13 14 15 B. Z. . . . 348.84 •9.10 38.1 5.7 49.0 51.3 19.2 4.8 4 1 51.40 2 33.730 2 31.671 2 32.713 2 33.783 2 33.769 2 31.760 2 32.567 2 32.416 2 25.652 2 33.919 2 31.608 2 32.527 2 33.638 +7 2.93 4.76 7 3.50 5.25 7 3.90 5.80 —0.053 +1.353 0.381 30.092 50.2 50.3 43.6 * 9 Mars . . . S.P. . 41.0 43.0 35.0 3.2 47.3 54.0 56.0 48.5 16.5 8.0 9.5 1.5 13.5 4 8 54.33 4 856.16 4 18 48.33 Mars . . . F. . . B. Z. . . . 348.84 •9.10 *9 Mars . . . N.P. . Mars . . F. . 52.0 53.5 18.3 45 0 5.0 7.0 31.5 31.0 58.0 4 25 51.83 4 25 53.58 4 33 18.17 4 36 17.10 B.Z. . . . 348.79 B.Z. . . . 348.84 * 9.10 4.7 3.2 " 9 . . . 28.0 Mars . . . S.P. . 7.0 21.0 35.0 4 43 21.00 !6 Mars . . . F. . . 9.2 23.0 30.5 4 43 22.90 17 18 19 20 B. Z. . . . 348.84 •9.10 • 9 54. 2 21.8 6 0 8.1 35.4 19 2 21.0 49.1 5 3 7.79 2 33.761 2 31.551 2 32.541 2 32.069 7 3.88 5.94 +1.692 Mars . . . N.P. . 58.0 12.0 35.0 5 10 11.67 21 Mars . . . F. . . 1.1 13.1 27.0 5 10 13.73 22 23 24 as 26 27 28 B. Z. . . . 348.84 •9.10 •9 30.2 58.3 40.8 34.0 36.2 53.7 22.1 43.1 11.0 54.7 47.3 49.1 57.0 24.8 5 29 43.43 2 33.858 2 31.599 2 32.502 2 33.989 2 29.272 2 27.245 7 4.00 5.77 7 4.83 6.30 —0.131 +1.997 Mara . . . S.P. . Mars F. 1.0 3.3 20.5 48.0 5 36 47.43 5 36 49.20 5 47 7.10 B.Z. . . . 348.84 "9.10 29 *9 5.6 19.3 2 28.170 30 Mars . . . N.P. . 58.0 12.1 25.7 5 54 11.93 2 27.275 31 Mars . . . F. . . 0.2 13.5 36.2 5 54 13.30 32 33 B. Z. . . . 348.84 •9.10 1.-..6 44.1 29.3 56.7 42.3 10.1 6 2 29.03 2 29.279 2 27.056 + 7 4.75 6.85 +0.821 34 35 36 •9 Mars . . . S.P. . 27.1 41.0 34.0 36.9 54.0 47.0 49.0 6 9 33.78 6 9 35.88 2 27.849 2 28.458 \ Mars . . . F. . . Remarks, The night misty. Planet blurred and indistinct. A 6. 352 OPPOSITION OF MARS, 1849-50, NOVEMBER a, 1849— Continued. Results. Mars — B. Z. 348.84 Mars — B. Z. 348.84 Seven comparisons Six comparisons .... Correction of chronometer . if chronometer times. Mars centre — • A a. A i. h. in- s. m. s. 5 9 51 19 . . . . +7 6 31 + 43.81 A p . . . . . . 0 00 h. in. s. Rev. 5 20 0.52 . . . . . . -f 1 002 + 43.82 . . . . . . +15" 41 A o . 0".00 KOVKMBKIi 4, 1849. g Chron'rtime of transit. Mars — Star. Thermometers. B \f pan of vvirps Micr. Bar 1 Object. A. B. C. A a. AJ. Att. Int. Ex. 1 o s. s. 8. b. m. 8. Rev. m. 8. Rev. Inches. « 0 * Z 1 •9 49.5 3.0 16.5 2 42.558 30.170 60.0 54.3 59.0 2 •9 . . 49.0 3.0 .... 2 46.082 3 Mars . . . P. . . 34.2 47.0 3 44 33.85 4 Mara . . . S.F. . 35.2 48.2 3 44 35.05 2 42.100 5 B. Z. . . . 348.94 31.0 1 43.848 6 B. Z. . . . 348.95 17.0 3 46 3.85 1 50.492 —1 28.80 —21.759 30.00 7 "9 3.5 2 48.086 8 •9 42.5 56.2 9.5 .... 2 42.581 9 •9 56.2 2 46.179 10 Mars . . P. . . 40.0 3 56 26.55 11 Mars . . . N.F. . 42.5 3 56 28.05 2 40.690 12 B. Z. . . . 348.94 37.5 1 43.431 13 B. Z. . . . 348.95 . 10.5 3 57 57.05 1 50.544 ] 29.00 20.297 30.50 14 *9 42.3 56.1 9.5 2 42.528 15 •9 29.1 42.5 56.5 .... 2 46.066 16 Mars . . . S.P. . 12.3 26.0 40.0 4 7 26.10 2 42.068 17 Mars . . . N.F. . 38.2 41.8 4 7 28.10 2 40.562 18 B. Z. . . . 348.94 10.1 24.3 37.7 . 1 43.730 19 B.Z. . . . 348.95 55.5 9.5 4 8 55.60 1 50.411 1 27.50 21.808 29.50 20.302 90 •9 55.2 9.2 22.9 2 42.600 21 *9 42.1 56.0 9.2 . . • 2 46.235 98 Mars . . . 8.P. . 26.0 39.7 53.2 4 18 39.63 2 42.092 S3 Mars . . . N.F. . 27.9 41.5 54.7 4 18 41.37 2 40.551 24 B. Z. . . . 348.94 23.2 37.0 51.2 . 1 45.725 95 B. Z. . . . 348.95 8.5 22.1 4 20 8.55 1 50.498 1 27.18 21.745 28.92 20.204 36 •9 27.2 41.2 54.5 2 46.021 27 Mars . . . 8 P. . 11.0 25.2 38.3 4 36 24.80 2 41.777 98 Mars . . , N.F. . 13.3 27.0 39.7 4 36 26.33 2 40.253 39 B. Z. . . . 348.94 8.2 22.0 35.6 1 43.612 SO B. Z. . . . 348.95 . . 54.2 7.6 4 37 54.03 1 50.219 1 27.70 21.709 29.28 20.185 31 *9 2.5 16.0 30.0 2 46.038 32 Mars . . . S.P. . 46.2 1.0 13.2 4 43 59.70 2 41.760 33 Mars . . . N.F. . 48.1 3.5 15.1 4 44 1.60 2 40.350 34 B. Z. . . . 348.94 43.2 57.6 10.5 t 1 43.701 35 B. Z. . . . 348.95 29.2 42.7 4 45 29.00 1 50.252 1 27.40 21.659 29.30 20.249 36 *9 35.2 48.5 2.5 37 Mare . . . S.P. . 19.2 34.2 46.2 4 53 32.70 2 4j.965 2 41.490 38 Mars . . . N.F. . . . w t 2 40.208 39 B.Z. . . . 348.94 10.2 29.5 43.2 1 43.551 40 B. Z. . . . 348.95 1.5 15.0 455 1.53 1 50.290 —1 28.83 —21 .351 20.069 AT THE NAVAL OBSERVATORY, WASHINGTON. 353 NOVEMBER 4, 1849— Continued. No. for reference. Object. Chron'r time of transit. Mean of wires Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. A I. Alt. Int. El. p. 8. &. h. in. u. Rev. m. s. Rev. Inches. • • • 41 43 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 •9 Mara . . . S.P. . Mara . . . N. . . 12.5 57.1 26.0 11.3 39.5 23.5 5 3 10.30 2 45.931 2 41.290 2 40.105 1 43.460 1 50.266 2 46.122 2 41.550 2 40.263 1 43.680 1 50.441 2 46.220 2 41.300 2 40.209 1 43.886 1 50.472 2 46.370 2 41.608 2 40.479 1 41.015 1 50.728 2 46.361 2 41.484 2 40.232 1 43.941 1 50.662 2 46.360 2 41.343 2 40.129 1 44.108 1 50.682 —1 28.90 1 28.95 1 29.03 1 28.33 1 28.60 —1 27.95 —21.175 19.991 21.260 19.973 20.979 19.888 21.031 19.903 20.973 19.721 20.812 —19.598 30.176 60.0 54.3 59.0 B. Z. . . . 348.94 B. Z. . . . 3-18.93 *9 Mars . . . S.P. . Mars . . . N. . . 54.2 45.5 39.5 7.2 39.3 58.5 44.2 20.5 52.3 12.0 ,57.2 5 4 39.20 5 15 43.35 B. Z. . . . 348.94 B. Z. . . . 348.95 »9 Mars . . . S.P. . 27.1 2.5 47.2 40.3 12.3 16.1 1.9 54.1 25.7 29.3 14.0 5 17 12.30 5 25 0.60 Mars . . . N. . . B. Z. . . . 348.94 B. Z. . . . 348.95 *9 6.2 51.0 29.5 19.5 5.3 1.5 43.1 33.7 17.3 5 25 29.63 5 34 4.15 Mars . . . S.P. Mars . . . N. . . B. Z. . . . 348.94 B. Z. . . . 348 95 •9 47.2 8.5 53.1 1,3 33.5 21.5 7.2 14.3 46.2 35.1 19.2 5 35 33.48 5 41 6.15 Mars . . . S.P. . Mars . . . N. . . B. Z. . . . 348.94 B. Z. . . . 348.95 *9 49.2 30.5 14.2 3.5 35.2 43.0 29.2 16.0 48.0 56.3 41.6 5 42 34.75 5 52 27.90 Mars . . S.P. Mars . . . N. . . B. Z. . . . 348.94 B. Z. . . . 348.95 10.3 42.5 23.5 9.2 5 53 55.85 Remarks. Night misty ; at conclusion, stars not seen. After this comparison, the transit of the preceding limb is observed on A. C., and the following limb on B., unless where it is otherwise noted. A 5. Results. Mean of chronometer times. Mars— B.Z. 348.95 Man P. and centre — B. Z. 348. 95 Six comparisons . . . . Correction of chronometer . Seven comparisons . . Correction of chronometer h. m. 8. 4 14 35.10 + 49.40 h. m. s. 5 23 35.02 + 49.46 Ap Ap Mars — « A a. A i. m. B. Rev. - 1 28.75 — 20.992 ... —S> 22".68 0.00 — 0".10 m. s. Rev. - ] 38.66 — 90.480 ... -y 14".B1 — 0".0» 45 354 OPPOSITION OP MARS, 1849-50, NOVEMBER G, 1849. ^ No. for reference. Object. Chron'r time of transit. Mean of wires Micr. Mars — Star. Bar. Thermometers. A. B. C. A a. Ai. Alt. Int. Ex. s. a. s. h. in. s. Rev. m. s. Rev. Inches. 0 • • Mars . . . S.P. . 92.1 36.1 50.3 3 59 36.17 2 36.177 30.028 72.0 65.0 61.0 3 3 Mara . . . N.F. . B. Z. . . . 34S.95 34.3 30.8 38.3 44.0 51.3 58.1 3 59 38.03 4 0 44.30 2 34.682 2 34.985 —1 8.13 —1.192 +0.303 4 5 6 7 B 9 Mars . . . S.P. . Mars . N. . . 7.1 22.1 33.9 4 5 20.50 2 36.220 2 34.591 2 34.819 2 35.919 2 34.680 2 34.851 1 7.60 1 7.60 —1.401 +0.228 —1.068 +0.171 B. Z. . . . 348.95 Mara . . S.P. . 59.7 29.7 15.1 42.0 26.7 4 6 28.10 4 11 13.20 B.Z. . . . 348.95 7.3 20.8 34.3 4 12 20.80 10 11 13 Mars . . . S.P. . Mars N. 49.2 4.1 16.0 4 16 2.60 2 36.228 2 34.697 234.840 1 8.13 —1.388 +0.143 B.Z. . . . 348.95 57.3 10.8 24.1 4 17 10.73 13 14 15 Mars . . . S.P. . Mars . . . N. . . 56.0 10.8 23.2 4 20 9.60 2 36.167 2 34.590 2 34.879 1 7.75 —1.288 +0.289 B. Z. . . . 348.95 3.8 30.9 4 21 17.35 16 17 18 Mars . . . S.P. . Mars . . . N. . . 54.3 9.5 21.3 4 25 7.75 2 35.947 2 34.552 2 34.769 1 8.18 —1.178 +0.217 B. Z. . . . 348.95 2.3 16.0 29.5 4 26 15.93 19 30 21 Mars . . . S.P. . Mara . . . N. . . 11.2 26.6 38.7 4 29 21.95 2 35.756 2 34.395 2 35.009 1 8.12 • —0.747 +0.614 B. Z. . . . 348.95 19.4 33.2 46.6 4 30 33.07 33 33 34 Mars . . . S.P. . Mars . . . N. . 27.9 43.0 54.9 4 33 41 .40 2 35.831 2 34.462 2 35.060 —1 7.97 —0.771 +0.598 B.Z. . . . 348.95 36.0 49.1 3.0 4 34 49.37 Remarks. Observations interrupted by thick fog. A 6. Results. Mean of chronometer times. h. m. s. Mars P. and centre —B. Z. 348. 95 . Eight comparisons . . . . 41734.45 Correction of chronometer . +54.47 Mars — • A a. A S. m. s. Rev. — 1 7.93 — 0.809 . . . —12". 43 0.00 0».00 NOVEMBER 10, 184,9. No. for reference. Object. Cliron'r time of transit. Mean of wires. Micr. Mars — Star. Bar. Thermometers. A. B. C. A a. A I. Alt. Int. Ex. a. s. s. h. m. s. Rev. m. s. Rev. Inches. • • • 1 2 3 4 5 6 Mars . . . S.P. . Mars . . . N. . . 36.9 51.3 3.5 3 42 50.20 2 37.921 2 3S.382 i! :r,.-ir>H 2 37.609 2 36.390 (Star lost.) —1 28.17 —1 28.15 —0.924 —2.563 29.950 73.0 48.0 B. A. C. . . 2154 . Mars . . . s.P. . Mare . . . N. . 5.1 41.8 18.2 56.7 31.8 9.1 3 44 18.37 3 48 55.45 B.A. C. . . 2154 . 10.1 23.5 3 50 23.50 AT THE NAVAL OBSERVATORY, WASHINGTON. NOVEMBER 1O, 1849— Continued. Remarks. Observations interrupted by clouds continuing all night. A 6. 355 NOVEMBER 12, is HI. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Mars— Star. Bar. . Thermometers. A. B. C. A a. A<5. Alt. Int. Ex. 8. s. s. h. in. s. Rev. s. Rev. Inches. ' • • 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 n • 3D 31 33 33 34 35 36 37 38 39 40 41 42 43 44 45 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 56.1 29.1 9.2 44.1 23.5 56.0 3 55 9.60 3 55 42.55 2 46.710 2 34.027 2 32.248 2 46.611 2 33. 969 2 32.081 2 46.609 2 33.907 2 32.051 2 46.478 2 33.831 2 31.910 2 46.518 2 33.685 2 31.840 2 46.540 2 33.721 2 31.888 2 46.393 2 33.630 2 31.852 2 46.578 2 33.691 2 31.761 2 46.503 2 33.553 2 31.757 2 46.537 2 33.490 2 31.569 2 46.321 2 33.303 2 31.472 2 4H.291 2 33.213 2 31.318 2 46.358 2 33.023 2 31.340 2 46.340 2 32.960 2 31.315 2 46.116 2 23.014 2 31.226 +32.95 32.73 32.82 32.80 32.95 32.63 32.63 32.42 33.05 32.35 32.12 32.35 32.25 31.85 +32.62 +12.683 14.462 12 642 14.530 12.702 14.558 12.647 14.568 12.833 14.678 12.819 14.652 12.763 14.541 12.887 14.817 12.950 14.746 13.047 14.968 13.018 14.849 13.078 14.973 13.335 15.018 13.380 15.025 13.102 +14.890 30.094 74.0 47.0 44.0 • Lalande . . 12557 . Mars . S.P. 3.4 38.2 17.2 51.5 30.3 3.2 4 0 16.97 4 0 49.70 Mars . . . N. . Lalande . . 12557 Mars . . . S.P. . Mars . . . N. . . 15.3 48.2 29.1 4.0 42.4 15.3 4 4 28.93 4 5 1.75 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 31.3 4.0 44.5 19.1 58.3 31.0 4 9 44.70 4 10 17.50 Lalande . . 12557 . Mars . . . S.P. . 9.3 42.1 23.0 57.5 36.1 9.4 4 13 22.80 4 13 55.75 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 17.3 49.7 30.7 5.1 44.3 17.1 4 18 30.77 4 19 3.40 Lalande . . 13557 . Mars . . . S.P. . 54.3 26.9 7.7 42.5 21.3 53.9 4 22 7.77 4 22 40.40 Mars . . . N. . . Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 26.3 59.0 40.5 14.2 53.3 25.9 4 28 40.03 4 29 12.45 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 38.1 50.8 26.1 4,4 37.5 4 32 51.10 4 32 24.15 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . 15.3 47.9 29.2 3.4 43.1 15.2 4 37 29.20 4 38 1 .55 Lalande . . 12557 . Mara . . S.P. 27.2 59.0 40.7 15.0 54.3 28.7 4 42 40.73 4 43 12.85 Mars . . . N. . Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 8.8 41.0 23.1 57.3 36.2 9.1 4 48 22.70 4 48 55.05 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 53.1 27.8 9.4 43.2 23.1 55.1 4 52 9.20 4 52 41.45 Lalande . . 12557 . Mars . . . S.P. . Mara . . . N. . . 28.1 41.3 15.1 54.5 96.9 4 55 41.30 4 56 13.15 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 24.3 56.8 38.3 11.9 51.4 24.0 5 0 37.77 5 1 10.40 356 OPPOSITION OP MARS, 1849-50, NOVEMBER lit, 1849— Continued. No. for reference. Object. Chron'r time of transit. Mean of wires Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. A J. Alt. Int. Ex. s. s. s. h. m. s. Rev. s. Rev. Inches. • • • 46 47 48 49 50 51 53 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 Lalande . . 12557 . Mars S.P. . 45.3 17.1 59.1 33.0 12.5 44.5 5 10 58.97 5 11 30.80 2 45.426 2 32.140 2 30.272 2 45.571 2 32.109 2 30.392 2 45.395 2 32.055 2 30.313 2 45.270 2 31.862 2 30.231 2 46.407 2 32.751 2 31.315 2 45.608 2 31.952 2 30.100 2 45.692 2 31 .932 2 30.178 2 45.652 231.887 2 30.191 2 45.731 2 31.770 2 30.052 2 46.389 2 32.041 2 30.620 +31.83 31.92 31.73 31.45 31.89 30.58 30.95 31.42 31.30 +31.41 +13.286 15.154 13.462 15.179 13.340 15.082 13.408 15.039 13.656 15.092 13.656 15.508 13.760 15.514 13.765 15.461 13.961 15.679 14.348 +15.769 30.094 74.0 1 47.0 44.0 Lalande . . 12557 . Mars . . . S.P. . 39.1 52.0 25.5 ' 5.1 37.8 5 15 52.07 5 16 23.99 Lalande . . 12557 . Mars . . . S.P. . Mars . N. 36.2 8.0 50.3 23.1 3.1 35.2 5 24 49.87 5 25 21.60 Lalande . . 12557 . Mars . . . S.P. . 59.4 30.7 13.2 46.2 26.1 58.0 5 32 12.90 5 32 44.35 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N.F. . Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 6.1 58.2 20.0 51.0 53.2 11.4 44.1 33.3 5.0 6.2 25.1 56.2 5 38 19.80 5 38 49.05 5 38 51.69 5 57 11.57 5 57 42.15 Lalande . . 12557 . Mars . . . S.P. . 3.3 16.2 49.1 29.1 0.8 6 1 16.20 6 1 47.15 Mars . . . N. Lalande . . 12557 . Mare . . . S.P. . Mars . . . N. . 40.0 11.0 53.3 27.0 7.0 38.7 6 7 53.43 6 8 24.85 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 39.1 11.0 52.7 25.6 6.0 36.8 6 15 52.60 6 16 23.90 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 10.1 41.2 23.5 56.5 0.8 6 42 23.44 6 4254.85 Remarks. The position of the observer at the last comparison was so confined and cramped as to render the observations altogether unsatisfactory. Night very fine. Low mist, and very heavy dew. A 10. Results. Mean of chronometer times. Mara P. and centre —Lalande 12557 Nineteen comparisons Correction of chronometer h. m. s. 4 39 45.41 + 1 5.12 h. m. s. Ap 0.00 Mars — * A (5. Rev. ). + 13.924 + 3' 34". 03 + 0".06 Rev. 14.681 Mure P. and centre —Lalande 12557 . Six comparisons .... 6 740.32 +31.26 + Correction of chronometer . +1 5.24 +3' 45". 67 A f . . . 0.00 + 0".D6 AT THE NAVAL OBSERVATORY, WASHINGTON. 357 NOVEMBER 13, 1849. No. I'or reference. Object. • Cliron'r time of transit. Mean of wires. Micr. Mars— Star. Bar. Thermometers. A. IJ. C. A a. Ad. Alt. Int. Ex. 8. s. s. h. m. s. Rev. m. s. Rev. Inches. • • • 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 31 22 23 24 25 a 26 27 28 39 30 31 a 32 33 34 35 36 37 38 39 40 41 49 43 a 44 45 46 47 48 49 50 Lnlande . . 12557 . Mars . . . S.P. . Mara . N 39.3 56.0 53.1 11.2 6.0 23.0 3 14 52.80 3 15 9.50 3 33.752 2 39.133 2 37.709 333.565 2 39.029 2 37.615 3 33.620 2 38.959 2 37.615 3 36.782 2 42.091 2 40.686 3 36.788 2 42.211 2 40.710 3 36.802 2 «.150 2 40.726 3 36.875 2 41.989 2 40.513 3 36.862 2 42.150 2 40.696 3 36.902 Lost. 2 48.387 3 36.802 2 42.070 2 40.345 3 36.928 2 41.905 2 40.486 336.826 2 41.769 2 40.396 3 36.925 2 41.739 2 40.276 3 36.975 2 41.761 2 40.466 3 37.075 Lost. 3 40.401 3 37.011 2 41.578 2 40.275 3 36.950 2 41.438 +16.70 16.73 16.10 16.00 15.98 15.98 16.10 16.45 15.68 15.63 15.90 15.87 15.33 15.07 15.38 +14.80 +24.532 25.956 24.449 25.863 24.574 25.918 24.604 26.009 24.4SO 25.991 24.565 25.989 24.799 26.276 24.625 26.079 24.645 26.370 24.970 26.343 25.099 26.562 25.127 26.402 25.346 26.649 25.425 +26.657 30.012 60.0 55.5 Lalande . . 12557 . Mars . . . S.P. . 18.1 35.0 31.0 49.0 45.0 1.2 3 19 31.37 3 19 48.10 Mars . . N. Lalande . . 12557 . Mars . . . S.P. 53.0 8.3 5.1 23.0 34.1 3 23 5.10 3 23 21.20 Lalande . . 12557 . Mars . . . S P. 24.0 40.0 38.0 56.0 51.7 7.8 3 29 37.90 3 29 53.90 Lalande . . 12557 . Mars . . . S.P. . Mars N. 14.9 31.2 28.5 46.0 42.0 57.7 3 32 28.47 3 33 44.45 Lalande . . 12557 . Mars . . . S.P. . Mars N 33.0 49.1 46.5 0.5 16.2 3 36 46.67 3 37 2.65 Lalnnde . . 12557 . Mars . . . S.P. . , 4.2 17.7 35.2 31.0 47.1 3 40 17.63 3 40 33.73 Lalande . . 12557 . Mars . . . S.P. . 58.5 15.0 12.0 29.7 25.2 41.7 3 43 11.90 3 43 28.35 Lalande . . 12557 . Man . . . S.P. . Mars . N 19.7 35.0 33.1 51.0 47.0 2.9 3 45 33.27 3 45 48.95 Lalande . . 12557 . Mars . . . S.P. . Mars . . N. 35.2 51.0 49.1 6.5 2.3 18.0 3 50 48.87 3 51 4.50 Lalande . . 12557 . Mars . . . S.P. . Mars . . N. 45.1 3.1 58.5 10.3 28.2 3 59 57.97 4 0 15.65 Lalande . . 12557 . Mars . . . S.P. . Mars . . N. 34.3 37.5 55.1 51.0 6.9 4 7 37.60 4 7 53.50 Lalande . . 12557 . Mare . . . S.P. . 14.2 30.2 28.0 45.3 41.0 57.0 4 11 27.73 4 11 43.60 Mars N Lalande . . 12557 . Mars . S.P. 47.3 3.3 1.0 18.1 14.3 29.2 4 18 0.87 4 18 16.20 Lalande . . 12557 . Mars . . . S.P. . Mars . . . N. . . 55.1 10.0 8.5 21.7 37.0 4 21 8.43 4 21 23.50 Lalande . . 12557 . Mars . . . 8.P. . Mara . . . N. . . 39.3 54.0 52.1 9.3 6.0 21.5 4 42 52.37 4 43 7.75 Lalande . . 12557 . Mars . . . S.P. . 31.3 46.2 45.0 1.9 58.1 13.0 4 47 44.80 4 47 59.60 358 OPPOSITION OF MARS, 1849-50, NOVEMBER 13, 1849— Continued. | Chron'r time of transit. Micr Mars— Star. Thermometers. 1 Object. A. B. C. A a. AJ. Alt. Int. Ex. 6 * 8. 8. h. in. s. Rev. 8. Rev. Inches. • • • 51 Mars . . . N. . . 2 40.206 30 012 & 53 Lalande . . 12557 . Mars . . . S.P. . 28.1 48.0 41.0 58.2 55.0 10.0 4 52 41.37 4 52 56.50 3 36.895 2 41.547 +15.13 +25.261 26.575 54 Mars . . . N. . . 2 40 233 Remarks. Very fine night. A 10. a Omitted in means. Results. Mean of chronometer times. li. m. s. Mars P. and centre —Lalande 12557 . Fifteen comparisons ... 3 55 40.23 Correction of chronometer . + 1 6.96 Mars — * A a. Ai. Rev. + 25.538 + 6' 32". 56 0.00 + 0".12 + 15.87 NOVEMBER 30, 1849. 1 Chron'r time of transit. Micr Mars — Star. Thermometers. y fi Object. A. B. C. A a. A d. Alt. Int. Ex. d s. s. 8. h. m. s. Rev. m. s. Rev. Inches. - • • 1 2 B. Z. . . . 523.110 Mars . . . N.P. . • • 18.2 29.0 3 46 18.2 3 47 29.0 2 38.258 2 38.161 +1 10.8- 12.1 +0.097 29.78 57.8 58.4 3 Mars . . . F. . . 30.3 3 47 30.3 . . . 4 5 B. Z. . . . 523.110 Mars . . . N.P. . • 41.8 52.0 • • 3 50 41.8 3 51 52.0 2 38.297 2 38.149 +1 10.2 11.8 +0.148 6 Mars . . . F. . . • • 53.6 3 51 53.6 . . . Remarks. Wind too high, and soon overclouded. A 7. NOVEMBER 34, 1849. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. AS. Att. Int. Ex. B. 6. s. h. m. s. Rev. ,. Rev. Inches. • - • 1 2 3 4 S 6 7 B. Z. . . . 523.106 Mars . . . S.P. . "9 .... 25.1 4.0 27.0 43.1 39.1 40.8 57.0 36.0 37.5 59.2 32.2 55.0 49.0 51.0 12.7 • 3 48 39.00 3 49 18.10 3 50 40.93 3 54 56.90 3 55 35.90 3 55 37.40 3 56 59.03 -. 2 42.070 2 40.179 2 53.543 2 42.019 2 39.099 2 53.511 + 39.10 + 39.00 +1.891 +2.920 30.054 70.0 54.0 B.Z. . , . 523.106 Mare ... p. Mara . . . N.F. . "9 . . 45.2 AT THE NAVAL OBSERVATORY, WASHINGTON. 359 NOVEMBER 34, 1849— Continued. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Mars— Star. Bar. Thermometers. A. B. C. Aa A. . 29.0 7.0 9.2 31.0 45.8 34.0 26.2 49.1 48.0 21.0 23.0 44.7 38.0 39.2 2.3 4 12 28.90 4 13 6.90 4 13 9.10 4 14 31.30 4 19 45.70 4 20 23.90 4 20 26.10 4 21 48.53 4 23 47.90 2 42.222 2 38.870 2 53.772 2 42.251 2 40.261 2 53.741 2 42.114 38.75 3.352 1.990 3.343 Mars . . . N.F. . • 9 18.2 33.2 B. Z. . . . 523.106 Mars P. Mars . . . S.F. . * 9 34.2 35.1 B. Z. . . . 523.106 24 25 36 Mars . . . N.P. . • 9 13.0 36.8 56.1 28.0 51.3 10.2 40.3 4.0 4 24 26.65 4 25 50.70 4 48 10.10 2 38.771 (Lost.) 2 42.225 36.80 3.745 B. Z. . . . 523.106 27 28 29 Mars . . . N.P. . »g 33.0 59.3 15.1 49.1 13.1 29.1 0.8 26.2 4 48 46.90 4 50 12.87 4 55 29.00 2 38.480 (Lost) 2 42.220 + 36.30 3.676 B. Z. . . . 523.106 30 31 32 33 Mars . . . N.P. . * 9 51.4 18.2 6.5 31.1 19.2 44.8 14.0 4 57 5.30 4 58 31.37 4 59 0.65 4 59 6.10 2 38.544 2 53.663 1 56.537 1 57.173 —2 0.80 * 9 B. Z. . . . 523.111 6.2 34 B. Z. . . . 523.106 45.1 58.4 12.0 5 32 58.50 2 43.740 + 34.55 +2.739 35 Mars . . . S.P. . 19.2 34.3 46.9 5 33 33.05 2 41.001 38 37 38 *9 * 9 . .... 48.3 30.4 36.0 15.1 44.7 49.1 5 35 1.70 5 35 30.30 5 35 35.80 2 55.372 1 58.131 1 58.910 —2 2.75 B. Z. . . . 523.111 22.3 Remarks. Clouds interrupted further observations. The star B. Z. 523.106 was used in these comparisons, instead of B. Z. 523.111, it being most distinctly seen. The other star (111) was intended to be used in continuing the observations, had the weather permitted. A 8. a Omitted in mean. MarsP— B. Z. 523.106 . MarsS — B.Z. 523.106 . MarsN— B. Z. 523.106 . Results. Mean of chronometer times. Mars — < h. m. s. Eight comparisons 4 27 24.92 Correction of chronometer . . . + 1 27.40 h. m. e. Five comparisons 4 22 45.71 Correction of chronometer . . . + 1 37.40 h. m. s. Five comparisons 4 27 48.33 Correction of chronometer . . . + 1 27,40 A a. . . . . + 37.89 Ap . . 0.00 Ap AJ. Rev. + 3.104 + 32". 34 , 0".00 Ap Rev. + 3.407 + 52" 37 , 0".00 360 OPPOSITION OF MARS, 1849-50, NOVEMBER 36, 1819. No. for reference. Object. Chron'r time of transit. Micr. Mars— Star. Thermometers. A. B. C. A a. A (5. Alt. Int. Ex. 8. s. s. b. in. s. Rev. s. Rev. Inches • • • 1 a 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 81 22 23 94 25 26 27 28 29 30 31 33 33o 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 SO Mars . . S.P. Mars . N. 17.2 32.1 44.0 3 34 30.60 2 37.001 2 33.379 3 33.691 2 37.040 2 35.290 2 33.589 2 36.741 2 35.078 2 33.490 2 36.449 2 35.038 2 33.502 2 36.290 2 35.022 2 33.509 2 38.632 2 34.789 2 33.666 2 36.455 2 34.913 2 33.599 2 36.339 2 34.a58 2 33.631 2 36.335 2 34.787 2 33.438 2 36.518 2 34.740 2 33.487 2 38.270 2 34 638 2 33.536 2 36.139 2 34.712 2 33.476 2 36.086 2 34.651 233.525 2 36.071 2 34.570 2 33.490 2 36.170 2 34.557 2 33.493 3 35.985 2 34.637 2 33.481 2 35.970 2 34.707 -17.13 17.05 16.88 17.09 17.79 18.12 18.30 18.00 19.59 19.15 19.45 19.68 19.25 19.98 -19.63 —3.310 1.688 3.451 1.701 3.251 1.588 2.947 1.536 2.781 1.513 2.956 1.123 2. 856 1.314 2.708 1.227 2.897 1.349 3.031 1.253 2.734 1.102 2.663 1.236 2.561 1.126 2.581 1.080 2.677 1.064 —2.504 1.156 49.5 Lalande . . 12237 Mara . . . S.P. 34.0 31.1 48.0 46.1 1.2 58.0 3 34 47.03 337 44.55 Lalande . . 12237 Mars . . . S.P. Mars . . . N. . 48.0 40.1 55.0 15.2 7.0 338 01.60 3 42 53.55 Lalande . . 12237 Mars . . . S.P. Mars . . . N. . . 57.1 10.0 10.0 25.2 24.2 37.2 3 43 10.43 3 46 23.60 Lalande . . 12237 . Mars . . . S.P. . Mare . . . N. . 4.8 18.2 54.2 31.0 3 46 40.69 3 48 17.90 Lalande . . 12237 . Mars . . . S.P. . Mare . . . N. . . 20.2 36.0 35.2 49.2 47.3 3 48 35.69 3 55 33.75 Lalande . . 12237 . Mars . . . S P. 38.5 12.1 52.0 28.2 5.1 39.5 3 55 51.87 4 225.80 Mars . . . N. . . Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. . . 30.1 28.0 43.1 58.1 65.0 4 2 44.10 4 5 41.50 Lalande . . 12237 . Wars . . . S.P. . Mars . . . N. . . 46.0 43.2 59.3 59.1 13.2 4 5 59.50 4 10 56.71 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N . . 2.5 18.2 34.0 30.1 45.5 4 11 16.30 4 14 31.85 Lalande . . 12237 . Mare . . . S.P. . Mars . . . N. . . 37.2 13.4 29.1 4.8 41.0 4 14 51.00 4 18 27.20 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. . . 10.2 46.0 26.2 37.1 4 18 46.00 4 21 23. 65 alande . . 12237 . Mars . . . S.P. . Mars . . . N. . . 29.1 20.0 43.0 36.1 57.2 47.9 4 21 43.10 4 24 33.95 alande . . 12237 . Mars . . . S.P. . Mare . . . N. . . 40.3 31.3 53.6 46.3 7.0 58.3 4 24 53.63 4 27 44.75 alande . . 12237 . Mars . . . S.P. . Mars . . . N. . . 14.1 4.0 39.2 18.2 41.0 4 28 04.00 4 31 27.55 alande . . 12237 . Man . . . S.P. . Mars . . . N. . . 34.3 17.2 47.3 31.5 1.0 44.2 4 31 47.53 4 35 30.70 alande . . 12237 Mare . . . s.P. . Man . . . N. . . 37.0 30.3 50.5 45.4 3.5 4 35 50.33 4 40 43.81 AT THE NAVAL OBSERVATORY, WASHINGTON. 361 NOVEMBER 36, 1849— Continued. No. for reference. , Object. Chron'r time of transit. Mean of wires Micr. Mars— Slur. Bar. Thermometers. A. B. C. A a. A d. Att. Int. Ex. s. B. 6. h. in. s. Rev. e. Rev. Inches. 0 " • 51 52 53 54 55 H 57 58 H 60 61 G2 63 64 65 66 67 68 69 70 71 a 72 73 74 75 76 77 78 79 80 81 63 83 84 85 M 87 88 88 80 91 93 93 94 95 96 97 98 99 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. 50.3 11.1 4.1 17.7 4 41 4.05 4 43 24.61 2 33.540 2 35.873 2 34.569 2 33.483 2 35.793 2 34.433 2 33.468 2 35.667 2 34.350 2 33.565 2 35.298 2 33.975 2 33.218 2 35.233 2 33.941 2 33.205 2 35.219 2 33.782 2 33.243 2 33.071 2 33.968 2 33.S89 2 33.149 2 33.932 2 33.337 2 34.302 2 33.072 2 32.781 2 31.229 2 33.011 2 32.539 2 34.160 2 32.681 2 32.580 2 34.130 2 32.790 2 32.580 2 32.119 2 30.780 2 30.810 2 32.232 2 30.671 2 30.548 2 32.058 2 30.591 2 30.462 2 41.255 2 43.040 2 43.191 —20.24 20.22 19.89 20.95 21.25 21.88 21.93 21.76 23.26 24.49 23.69 24.05 23.85 23.90 25.13 — 28.17 —2.430 1.167 2.390 1.086 2.330 0.963 2.103 0.785 2.080 0.757 2.028 0.736 1.976 0.539 1.782 0.679 1.795 0.575 1.521 0.291 1.670 0.452 1.580 0.301 1.550 0.210 —1.309 +0.030 —1.684 0.123 1.598 0.129 —1.084 +0.151 49.5 Lalande . . 12237 . Mars . . . S.P. . Mara . . . N. 31.3 13.2 45.0 28.1 58.2 4 43 44.83 4 46 26.71 Lalande . . 12237 . Mars . . . S.P. . 33.2 30.3 45.5 0.0 58.0 4 46 46.60 5 3 44.15 Mara . . . N. Lalande . . 12237 . Mars . . . S.P. 51.0 19.2 5.3 34.0 19.0 46.1 5 4 5.10 5 11 32.65 Mara . . . N. Lalnnde . . 12237 . Mars . . . S.P. . Mars . . . N. 40.3 9.9 53.8 25.2 7.7 37.2 5 11 53.90 5 14 23.55 Lalande . . 12237 . Mars . . . S P. . 31.3 15.2 45.3 30.1 59.7 42.2 5 14 45.43 5 17 28.70 Mars . . . N. Lalande . . 12237 . Mars . . . S.P. . Man . . N 37.0 25.3 50.7 40.9 4.2 5 17 50.03 5 20 38.71 Lilande . . 12237 . Mars . . . S.P. . Mars . . N 48.0 38.0 1 3 53.1 14.6 5 21 1.30 523 51.54 Lalande . . 12237 . Maw ... S.P. . Mars . . . N. 59.2 35.2 13.7 53.1 27.0 . . 5 24 13.30 5 40 48.74 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. 58.5 25.8 12.1 41.0 25.4 5 41 12.00 5 45 38.34 Lalande . . 12237 . Mara . . . S.P. . Mars . . . N. 49.0 30.8 3.1 46.1 16.4 5 46 2.83 5 49 44.34 Lalandu . . 12237 . Mars . . 8.P. . Mars . . . N. 54.8 0.0 8.1 15.2 21.8 27.0 5 50 8.23 5 55 13 50 Lalando . . 12237 . Mars . . . S.P. . Mars . . . N. 24 0 32.1 47.2 51.1 5 55 37.55 5 58 45.65 Lalande . . 12237 . Mars . . S.P. . Mars . . N 56.1 10.1 9.3 25.3 23.1 5 59 9.50 6 1 23.64 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. 34.0 6.1 47.0 22.0 6 1 47.54 6 5 19.64 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. 31.0 40.8 45.0 56.1 58.3 6 5 44.77 6 43 54.33 Lalande . . 12237 . 7.1 20.3 34.1 6 44 20.50 46' 362 OPPOSITION OF MARS, 1849-50, NOVEMBER 2O, 1849— Continued. No. for reference. Object. Cbron'r time of transit. Mean or wires Micr. Mars— Star. Bar. .Thermometers. A. B. C. A a. Ai. Alt. Int. Ex. 8. s. s. ll. 111. B. Rev. S. Rev. Inches. • • • 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 Mars . . . S.P. . Mare . N. 45.2 0.3 6 48 58.73 2 44.300 2 42.940 2 43.185 2 44.348 2 42.855 2 43.211 2 44.170 2 42.841 2 43.141 2 44.195 2 42.757 2 43.262 2 44.380 2 42.642 2 43.230 2 44.278 2 42.768 2 43.282 2 44.240 2 42.585 2 43.329 —27.17 26.50 26.63 26.64 27.60 27.37 —28.60 —1.115 +0.245 —1.137 +0.356 —1.029 -f 0.300 —0.933 +0.505 —1.150 +0.588 —0.996 +0.514 —0.911 +0.744 49.5 Lalande . . 12237 . Mars . . . S.P. . 12.3 26.8 26.1 41.5 39.3 6 49 25.90 6 52 40.33 Lalande . . 12237 . Mars ... S.P . Mars N 53.2 3.0 0.7 18.1 20.3 6 53 6.83 6 57 16.53 Lalande . . 12337 . Mars . . . S.P. . Mars . . . N. . 29.5 6.2 43.0 21.0 57.0 6 58 43.16 7 1 19.73 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. . . 33.0 26.1 46.1 41.3 0.0 7 1 46.37 7 5 39.63 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. . 53.6 10.7 7.1 26.2 21.0 7 6 7.23 7 9 24.23 Lalande . . 12237 . Mars . . . S.P. . Mars . . . N. . . 39.2 55.4 52.6 11.1 6.0 7 9 52.60 7 18 8.93 jalamle . . 12237 . 24.0 37.5 7 18 37.53 Remarks. Planet blurred, and star faint and unsteady. A 7. a Omitted in mean. Man P. —Lalande 12237 Mars centre —Lalande 12237 Results. Mean of chronometer times. Twenty-seven comparisons . Correction of chronometer . Twenty-nine comparisons . Correction of chronometer . Mars P. and centre —Lalande 12237 . Eleven comparisons . Correction of chronometer . h. m. a. 4 37 31.15 + 1 32.34 h. m. s. 4 36 16.78 + 1 32.34 h. m. s. 6 43 53.78 + 1 32.55 Mars — • A a A i m. s. .... —020.02 . . . A p . . 0.00 . . . Rev. — 1.737 —26". 70 Ap — O/'.OO s. Rev. — 26.32 —0.446 . . . —6". 86 0.00 — 0».00 Ap AT THE NAVAL OBSERVATORY, WASHINGTON. 363 NOVEMBER 27, 1819. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. A ,5. Alt. Int. Ex. s. s. 6. li. m. s. Rev. m. s. Rev. Inches. | O o 1 2 3 4 5 6 7 Mars . . . S.P. . Mara . . . N. . . 38.1 53.3 5.0 3 40 51.55 2 35.663 2 33.781 St 45.700 3 35.442 3 33.851 2 45.639 2 24.730 —1 33.18 —10.712 — 9.121 43.5 9 • 5.2 16.5 18.0 31.0 33.0 43.3 3 42 18.40 4 3 29.85 Mars . . . S.P. . Mars . . . N. . . • Lalande . . 12240 . 43.0 49.0 57.0 3.0 17.1 4 3 57.03 4 4 3.03 Remarks. Planet blurred and unsteady. Impossible to make comparisons within a revolution of micrometer. A 7. DECEMBER 6, IKJ'.I. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. A a. Alt. Int. Ex. s. s. s. h. m. s. Rev. s. Rev. Inches. • •'• - 1 Lalande . . 11714 . 57.1 11.0 25.0 3 35 11.03 2 33.550 +17.97 +19.991 39.962 80.0 39.0 2 Mars . . . S.P. . 15.2 30.7 43.8 3 35 29.00 1 43.710 3 Lalande . . 11714 . 46.2 59.5 13.1 3 45 59.60 2 33.739 17.85 21.448 4 Mars . . . N.P. . 4.1 19.2 30.8 3 46 17.45 1 42.442 5 Lalande . . 11684 . 48.1 1.3 15.1 3 49 1.50 2 27.273 6 Lalande . . 11714 . 39.2 53.0 . . 3 49 53.07 2 33.710 17.33 20.251 7 Mars . . . S.P. . 57.0 12.1 23.8 3 50 10.40 1 43.610 8 Lalande . . 11684 . 1.0 15.0 28.4 3 54 14.80 2 27.355 9 Lalande . . 11714 . 53.1 7.0 20.3 3 56 6.76 2 33.550 16.94 21.428 10 Mars . . . N.P. . 10.2 25.1 37.3 3 56 23.70 1 42.373 11 Lalande . . 11684 . 33.2 47.1 0.1 3 59 46.80 2 27.353 12 Lalande . . 11714 . 24.6 38.0 53.0 4 0 38.20 2 33.593 16.30 20.147 13 Mars . . . S.P. . 41.0 . • 8.0 4 0 54.50 1 43.597 14 Lalande . . 11684 . 32.5 46.0 59.7 4 4 46.07 2 27.331 15 Lalande . . 11714 . 24.2 38.0 51.0 4 5 37.73 2 33.583 15.77 21.643 16 Mare . . . N.P. . 40.0 55.7 7.0 4 5 53.50 1 42.091 17 Lalande . . 11684 . 24.2 38.1 52.0 4 10 38.10 2 27.530 18 Lalande . . 11714 . 15.0 39.0 42.0 4 11 28.66 2 33.650 15.84 | 20.186 19 Mars . . . S.P. . 31.0 46.1 58.0 4 11 44.50 1 43.615 20 Lalande . . 11684 . 54.1 8.1 22.0 4 29 8.07 2 27.572 21 Lalande . . 11714 . 46.2 59.0 13.0 4 29 59.40 3 33.559 14.55 30.331 22 Mars . . . S.P. . 0.0 15.2 27.9 4 30 13.95 1 43.379 23 Lalande . . 11684 . 17.1 31.0 44.0 4 33 30.70 2 27.490 24 Lalande . . 11714 . 8.9 22.0 36.0 4 34 22.30 2 33.598 14.25 21.834 25 Mars . . . N.P. . 23.1 38.3 50.0 4 34 36.55 2 41.925 26 Lalande . . 11684 . 19.2 33.0 46.5 4 40 32.90 2 27.358 27 Lalande . . 11714 . 11.0 24.0 38.0 4 41 24.33 223.503 13.95 20.172 38 Mara . . . S.P. . 24.3 40.0 4 41 38.28 1 43.382 39 Lalande . . 11684 . 14.0 36.9 41.3 4 45 27.40 2 37.410 30 Lalande . . 11714 . 5.0 33.0 4 46 19.00 2 33.810 +13.50 4-23.189 31 Man . . . N.P. . 18.9 34.3 46.1 4 46 33.50 1 41.772 364 OPPOSITION OF MARS, 1849-50, DECEMBER 6, 1S49— Continued. 1 riinm'r time of transit. ' Mars— Star. B'U'. Thermometers. 1 Object. A. B. C. A a. Ac!. Alt Int. Ex. • 6 s. s. s. h. m. s. Rev. s. Rev. Inches. 0 • 0 33 Lalande . . 11684 . 36.0 49.3 3.0 4 59 49.43 2 27.385 29.962 80.0 39.0 33 Lalande . . 11714 . 27.0 55.0 5 041.00 j 3 33.458 +12.40 +20.410 34 Mars . . . S.P. . i 39.8 55.2 7.0 5 0 53.40 1 43.199 35 Lalande . . 110S4 . 32.0 36.1 49.1 5 9 35.73 2 2o.243 36 Lalande . . 11714 . 14.0 5 10 27.74 2 31.342 10.95 21.941 37 Mars . . . N.P, . 35.3 40.2 52.0 5 10 38.65 1 39.552 38 Lalande . . 11684 . 53.0 7.0 20.5 5 17 6.83 2 2J.291 39 Lalande . . 11714 . 45.1 12.0 5 17 58.55 2 31.373 11.00 20.874 40 Mars . . . S.P. . 56.1 23.0 5 18 9.55 1 40.650 41 Lalandc . . 11684 . 8.0 21.7 35.3 5 22 21.66 2 23.218 42 Lalande . . 11714 . 0.0 27.0 5 23 13.50 2 31.262 10.70 21.914 43 Mars . . . N.P. . 10.3 38.1 5 23 24.20 1 39.499 44 Lalande . . 11684 . 20.4 34.2 48.1 5 27 34.23 2 25.200 45 Lalande . . 11714 . 12.5 39.7 5 28 26.10 2 31.221 10.55 20.692 46 Mara . . . S.P. . 23.1 50.2 5 38 36.65 1 40.680 47 Lalande . . 11684 17.2 30.7 44.0 5 33 30.63 2 25.160 48 Lalande . . 11714 . 9.0 36.0 5 34 23.50 2 31.202 10.00 22.171 49 Mars ... N.P. . 19.0 46.0 5 34 33.50 1 39.182 50 Lalande . . 11684 . 37.5 53.0 7.0 5 39 52.50 2 24.990 51 Lalande . . 11714 . 31.0 . . 58.0 5 40 44.50 2 31.181 9.91 20.842 S3 Mare . . . S.P. . 40.8 56.0 5 40 54.41 1 40.490 53 Lalande . . 11684 . 19.0 32.5 46.2 5 44 33.57 2 25.003 54 Lalande . . 11714 . 10.5 . . 5 45 24.06 2 30.980 9.41 22.040 55 Mars . . . N.P. . • • 33.0 47.0 5 45 33.47 1 39.091 58 Lalandc . . 11684 . 33.1 47.1 0.0 6 41 46.73 227.119 57 Lalande . . 11714 . . . 52.0 6 42 38.47 2 33.363 6.30 20.554 58 Mars . . . s.P. 58.3 649 .; 1 *i*i 59 Lalande . . 11684 4.7 18.1 33.0 « Vkt / / 6 48 18.27 1 42.960 2 27.239 60 Lalande . . 11714 . 56.0 10.0 6 49 9.67 2 33.130 5.00 20.341 61 Mars . . . s.P. . 1.0 16.0 • . 6 49 14.67 1 42.940 63 Lalande . . 11684 . 30.4 44.0 57.8 6 57 44.07 2 27.280 63 (4 Lalando . . 117H . Mars . . . N.P. . 33.0 36.0 36.0 41.0 49.0 53.0 6 58 36.00 6 58 39.50 2 33.190 1 41.940 3.50 21.401 65 Lalande . . 11684 . 19.3 33.0 46.3 7 5 32.80 2 27.455 66 67 Lalande . . 11714 . Mara . . . N.P. . 11.2 14.1 39.3 38.0 41.3 7 6 24.60 7 6 27.60 2 33.370 1 41.137 3.00 22.384 68 Lalande . . 11684 . 34.6 48.1 1.7 7 10 48.13 2 37.498 69 70 Lalande . . 11714 . Wars . . . s.P. . 26.2 29.0 44.0 53.3 55.3 7 11 39.70 7 11 42.10 2 33.610 1 42.785 +2.40 +20.976 The star 11714 was not well seen, and at some of the comparison throughout was blazing and unsteady. The wind high. A 7. Remarks. is scarce visible. 11684 is larger and was more distinct than the other. The plane! Results. Mean of chronometer times. Mars S.P. -Lalande 11714. . Thirteen comparisons . . s' "M.'SS Correction of chronometer +153.21 Mars — . A a. A i, s- Rev. + 11.81 + 20.444 ... + 5< 14". 25 0.0 + 0».0» AT THE NAVAL OBSERVATORY, WASHINGTON. DECEMBER 6, 1849— Continued. Results — Continued. 365 Mean of chronometer times. Mars N. P. — Lalandc 11714 . h. m. s. Eleven comparisons ..511 49.06 Correction of chronometer + 1 53.21 Mara centre — « An. A3. 8. Rev. + 11.44 + 21.853 . . . +5' 35". 91 0.00 + 0".10 DECEMBER 11, 1819. No. for reference. Object. Cnron'r lime of transit. Mean of wires Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. A.I. Att. Int. Ex. s. s. 8. h. m. s. Rev. , Rev. Inches. 0 O O 1 2 3 4 Humker . . 1673 . Mars . . . S.P. 28.2 44.0 12.3 29.3 41.5 £9.0 26.1 56.0 11.8 39.3 56.0 3 26 41.90 3 26 57.90 3 29 25.90 3 29 42.65 2 34.070 2 29.634 2 34.151 2 37.961 +16.00 16.75 +4.436 6.190 30.498 78.0 39.0 34.0 Rumker . . 1673 . Mars . . . N.P. . 5 6 7 8 Rumker . . 1673 . Mars . . S.P. 15.0 31.0 8.3 24.3 28.3 45.9 22.1 39.0 57.5 50.5 3 32 28.30 3 32 44.25 3 35 32.10 3 35 37.93 2 34.059 2 29.361 2 33.927 2 27.888 15.95 15.83 4.698 6.039 Rumker , . 1673 . Mars . . . N.P. . 9 10 Rumker . . 1673 . Mars . . . S.P. . 20.8 36.5 34.3 51.6 48.0 3.7 3 39 34.33 3 39 50.10 2 33.848 2 29.302 15.77 4.546 11 12 Rumker . . 1673 . Mars . . . N.P. . 23.0 37.5 36.1 53.2 49.0 3 43 35.70 3 43 51.05 2 32.019 3 35.625 15.35 6.394 13 14 Rumker . . 1673 . Mars . . . S.P. . 14.0 29.6 29.2 42.0 56.9 3 48 38.40 3 48 43.35 2 32.149 2 27.314 14.85 4.835 15 16 Rumker . . 1673 . Mars . . . N.P. . 32.8 36.5 36.1 49.0 3.8 3 52 35.97 3 52 50.15 2 32.125 2 35.545 14.18 6.580 17 18 Rumker . . 1673 . Mars . . . S.P. . 21.1 34.5 34.0 49.7 48.0 1.3 3 55 34.37 3 55 47.90 2 32.086 2 27.047 13.53 5.039 19 20 Rumker . . 1673 . Mara . . . N.P. . 18.5 30.3 31.0 45.2 57.1 4 20 31.00 4 20 43.70 2 31.731 2 25.151 12.70 6.580 31 33 Rumker . . 1673 . Mars . . . S.P. . 1.0 13.2 14.4 39.0 28.1 434 14.50 4 24 26.75 2 31.739 3 26.480 +12.35 +5.259 Remarks. Planet diffused and unsteady. Star scarcely visible. It was thought useless to continue the observations A 5. Mars S. P. —Rumker 1673 Mars N. P. —Rumker 1673 Results. Mean of chronometer times. Six comparisons Six comparisons Mara — • A a. A<5. b. m. 9. s. Rev. 3 47 45.02 .... . . +14.72 + 4.802 + 2 3.72 . . . . + 1' 13". 81 Ap . . . . 0.00 0".00 li. m. s. s. Rev. 3 48 33 08 + 14.56 + 6.357 4.2 3 73 + 1'37".72 Ae . 0.00 0 ".00 366 OPPOSITION OF MARS, 1849-50, DECEMBER 13, ISi'.l. 1 Chron'r time of transit. Mars— Star. 1 Thermometers. I Mean of wires Micr. Bar. b Object. A. B. C. A a. 6.6. Alt. Int. Ex. S s. s. s. h. m. s. Rev. m. s. Rev. Inches. e • • 1 Man . . . S.P. . 59.1 14.9 3 51 12.78 2 38.900 30.566 77.0 33.0 23.5 g Mare N. 2 37.518 3 Rumker . . 1680 . 53.1 6.8 21.0 3 53 6.96 2 33.761 —1 54.18 —5.139 4 Mara . . . N.P. . 19.0 34.3 46.8 3 55 32.90 2 37.525 5 Rumker . . 1680 . • • 36.8 41.0 3 57 26.98 2 33.745 1 54.08 3.780 6 Mare . . . S.P. . 33.8 39.2 53.3 3 58 38.73 2 39.152 7 Rumker . . 1680 . 32.0 46.1 4 0 32.18 2 33.743 1 53.45 5.409 8 Mare . . . N.P. . 15.8 31.1 42.9 4 2 29.35 2 37.472 - 9 Rumker . . 1680 . 10.2 • • 39.0 4 4 24.60 2 33.642 1 55.25 3.830 10 Mars . . . S.P. . 10.8 26.2 38.0 4 7 24.40 2 38.923 11 Rumker . . 1680 . 6.0 19.2 33.0 4 9 19.40 2 33.830 1 55.00 5.093 13 Mare . . . N.P. . 38.2 54.0 5.8 4 11 52.00 2 37.308 13 Rumker . . 1680 . 34.1 47.9 1.2 4 13 47.73 2 33.670 1 55.73 3.638 14 Mars . . . S.P. . 51.3 7.2 19.2 4 16 5.25 2 39.069 15 Rumker . . 1680 . • • 1.0 14.2 4 18 0.91 2 33.822 1 55.66 5.347 16 Mars . . . S.P. . 9.3 25.1 37.0 4 33 23.15 2 39.058 17 Rumker . . 1680 . 7.1 31.0 34.7 4 35 20.93 2 33.830 1 55.78 5.328 18 Mare . . . N.P. . 56.0 10.9 23.1 4 36 9.55 2 37.330 19 Rumker . . 1680 . 53.5 7.3 21.0 4 39 7.27 2 33.575 1 57.72 3.755 20 Mars . . . S.P. . 51.2 5.9 18.0 4 41 4.60 2 38.430 21 Rumker . . 1680 . 48.3 3.0 16.1 4 43 2.13 2 33.460 1 57.53 4.970 33 Mare . . . N.P. . 32.1 47.9 59.3 4 46 45.70 2 37.178 33 Rumker . . 1680 . 31.1 • • 58.5 4 48 44.80 2 33.491 1 59.10 3.687 34 Mars . . . S.P. . 32.1 48.0 0.0 4 0 46.05 2 38.412 23 Rumker . . 1680 . 32.1 46.0 0.0 4 2 46.03 2 33.413 1 59.98 4.999 26 Mars . . . N.P. . 15.2 30.3 42.7 4 4 28.95 2 37.020 37 Rumker . . 1680 . 14.4 38.0 43.0 4 6 28.13 2 33.632 1 59.18 3.398 38 Mars . . . S.P. . 24.0 39.2 51.1 4 8 37.55 238.392 29 Rumker . . 1680 . 34.3 37.5 51.5 4 10 37.73 2 33.353 2 0.18 5.039 30 Mars . . . N.P. . 30.3 45.2 57.1 4 12 43.65 2 36.838 31 lunik. T . . 1680 . 30.5 44.0 57.3 4 14 43.93 2 33.453 —2 0.38 —3.385 Remarks. Planet disturbed and blazing ; star of comparison scarcely visible. A 5. Mare S. P. —Rumker 1680 Man N. P. —Rumker 1680 Results. Mean of chronometer ti h. m. s. Eight comparisons . . . . 4 27 9,06 Correction of chronometer . 4. 2 6.42 me»- Mare centre— « A a. 66. m. s. Rev. .... — 1 56.47 _ 5.140 A p .... 0.00 — 0».02 h. m. s. Seven comparisons .... 4 32 51.73 Correction of chronometer . +2 6.43 m. s. Rev. .... — 1 57.33 — 3.639 Af> .... 0.00 — 0".03 AT THE NAVAL OBSERVATORY, WASHINGTON. 367 DECEMBER 17, 1849. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Mars — Star. Bar. Thermometers. A. B. C. A a. A:'. 1 U 2 42.379 2 34.14 3.267 71 *9 14.0 28.1 . 5 21 28.10 2 36.140 72 Mars . . . S.P. . 53.9 9.0 22.0 0 22 7.95 2 40.422 73 B. Z. . . . 405.56 29.0 43.1 56.1 5 24 42.73 ««:S8 2 34.78 1.930 74 •9 41.1 t t 8.2 5 26 54.65 2 36.069 75 Mars . . . S.P. . 20.8 36.2 49.1 5 27 34.95 2 40.380 76 B. Z. . . . 405.56 56.2 9.7 23.2 5 30 9.70 2 42.303 2 34.75 1.923 77 9 29.1 43.0 5 58 43.00 2 34.610 78 Mara . . . N.P. , , . 22.1 34.0 5 59 20.19 2 37.382 79 B.Z. . . . 405.56 43.1 57.1 11.0 6 01 57.06 2 40.816 2 36.87 3.434 80 9 28.1 41.9 6 541.90 2 34.853 81 Mars . . . s.P. . 20.2 32.5 6 6 18.69 2 39.082 82 • Z. . . . 405.56 43.1 57.2 10.5 6 8 56.93 2 41.150 2 38.24 2.068 83 9 5.2 19.0 6 11 19.00 2 34.972 84 a [ars . . . N.P. . . 56.1 9.0 6 11 55.19 2 37.642 85 B. Z. . . . 405.56 22.0 36.1 49.5 6 14 35.86 2 41.249 86 "9 ... 57.2 11 0 87 Mars . . . S.P. 48.5 0.8 5 16 11 .00 6 17 46.99 2 34.995 2 39.235 88 B. Z. . . . 405.56 12.2 26.0 39.6 6 20 25.93 2 41.288 2 38.94 2.053 89 •9 5.0 19.1 6 23 19.10 2 35.078 10 Mars . . . S.P. 8.2 6 25 54.39 2 39.152 H B.Z. . . . 405.56 • • 34.0 47.7 6 27 33.89 2 41.278 2 39.50 2.126 99 93 "9 . . 11.3 46.3 25.5 1.8 39.0 13.8 6 29 25.26 6 31 0.05 2 35.071 2 37.832 Mars . . . N.P. . 94 — — —, B- Z- . . . 405.56 . 39.5 54.3 6 33 39.39 2 41.295 —2 39.40 +3.463 Remarks. Prom 4*. to 4.15, comparisons good. During; the remainder the planet blurred and restleu. a Not used. A 6. AT THE NAVAL OBSERVATORY, WASHINGTON. DECEMBER 17, 181 9— Continued. Results. Means of chronometer times. 369 Mars—* s N. P. — B. Z 405.56 Mars S. I'. — B. Z. 405.56 . Sixteen comparisons li. in. s. 4 18 41.53 .... A a. A S. m. s. Rev. 2 29 61 +2 991 -j-2 19.18 _{- 45'/ 98 A f . , . . . . 0.00 + 0".02 h. m. s. 4 31 51.35 . . . m. P. Rev. 2 30 69 -f- 1 693 + 2 19.20 +26" 02 Ac . 4- 0".01 DECEMBER 37, 1849. No. for reference. Object. Chron'r time of transit. I Mean of wires. Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. A I. Alt. Int. Ex. s. s. s. h. m. s. Rev. m. s. Rev. Inches. • • • 1 2 3 4 5 a 6a 1 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Mars . . . S.P. . 41.0 57.3 31.2 48.3 28.1 49.7 29.8 56.1 11.4 47.1 1.8 43.0 3.5 45.1 8.0 25.2 58.9 15.8 55.2 17.5 57.2 2 45 54.50 2 48 11.30 2 51 45.05 254 1.96 2 56 41 65 2 59 3.56 3 0 43.50 2 39.348 2 36.890 2 38.039 2 37.028 2 39.170 2 37'061 •".910 2 39.141 2 38.091 2 37.040 2 89.419 2 37.082 2 39,128 2 38.104 2 37.048 2 39.101 2 38.129 2 37.041 2 39.132 2 38.112 2 37.068 2 39.390 2 38.169 2 37.087 2 39.143 2 38.068 2 37.068 2 39.463 2 38.133 2 37.068 2 39.409 2 38.188 2 36.969 2 39.490 2 38.105 2 37.080 -2 16.80 2 16.81 2 17.19 2 17.65 2 18.88 2 18.81 2 18.61 2 19.16 2 18.91 2 19.30 2 20.47 —2 20 48 —2.458 1.011 1.051 2.101 2.337 1.056 2.080 1.080 2.061 1.044 2.074 1.062 2.303 1.000 2.075 1.065 2.395 1.319 2.440 1.025 —2.410 30.200 75.0 29.0 29.0 B. Z. 405 «8 Mars . . . N.P. . B. Z. . . . 405.28 Mars S P. B. Z. . . . 405.28 Mars . . . S.P. . Miirs . . . N. . . B. Z. . . . 405.28 Mars . . . S.P. . B. Z. . . . 405.28 Mars ... P.P. . Mars . . . N. 6.8 24.1 16.9 0.8 22.1 38.2 3S.1 15.0 34.1 52.0 43.8 3 3 0 69 3 7 20.45 3 9 38.10 3 12 30.35 B.Z. . . . 405.28 Mars . . . S.P. . 35.2 7.1 49.5 23.2 3.0 34.2 3 14 49.23 3 16 20.65 Mars . . N. B. Z. . . . 405.28 Mara . . . S.P. . Mars . . . N. . . 25.8 37.1 39.5 52.2 53.1 3.6 3 18 39.46 3 19 50.35 B. Z. . . . 405.28 Mars . . . S.P. . Mars . . . N. . . 55.0 5.9 9.2 20.8 22.7 33.3 3 23 8.96 3 23 19.60 B. Z. . . . 405.28 Mars . . . S.P. . Mars . . . N. . . 24.8 27.9 39.0 43.1 52.5 55.0 3 25 38.76 3 26 41.43 B. Z. . . . 405.28 Mars . . . S.P. . Mars . . . N. . 46.6 6.2 0.5 14.0 33.4 3 29 0.36 3 31 19.80 B. Z. . . . 405.28 Mars . . . S.P. . Mars . . . N. . . 15.2 1.8 29.1 17.9 43.0 30.0 3 33 29.10 3 37 15.90 B. Z. . . . 405.28 Mars . . . S.P. . Mars . . . N 23.5 58.1 36.5 13.1 50.1 25 0 3 39 36.37 3 43 11.55 B. Z. . . . 405.28 18.0 33.0 46.1 3 45 32.03 370 OPPOSITION OF MARS, 1849-50, DECEMBER fit, 1849— Continued. No. for reference. Object. Chron'r time of transit. Mean of wires Micr. Mars — Star. Bar. Thermometers. A. B. C. An. A I. Alt. Int. Ex. s. s. s. h. m. s. Rev. in. s. Rev. Indies. • • • 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 53 53 54 55 56 57 58 59 60 61 68 63 64 65 66 67 Mars . . . S.P. . Mars . . . N. . . 12.8 28.1 3 49 26.53 2 39.540 2 38. 105 2 37.030 2 39.595 2 38.119 2 36.901 2 39.5Q9 2 38.190 (ion 236;™ 2 39.440 2 38.282 2 36.941 2 39.582 2 38.278 2 37.299 2 39.530 2 38.430 o in-5137 2 36.928 2 39.260 2 38.058 2 36.933 2 39.168 —2 20.40 2 22.22 2 22. 35 2 22.83 2 33.93 2 24.11 2 25.02 2 25.12 2 24.92 2 26.12 —2 25.39 —1.075 2.510 1.218 2.694 1.110 2.449 1.341 2.499 0.979 2.283 1.498 2.598 1.125 2.3S7 1.154 2.290 1.094 2.277 2.532 —1.040 2.450 30.200 75.0 2'J.O 29.0 B. Z. . . . 405.28 Mars . . . S.P. . Mars N 33.2 39.1 47.1 55.1 0.5 7.0 3 51 46.93 4 8 53.05 B. Z. . . . 405.28 Mare . . . SP. . Mars . . . N 1.5 3.1 15.3 18.0 29.0 30.0 4 10 15.27 4 18 16.55 B. Z. . . . 405.28 Mare . . . S P. . Mare . . . N. 25.0 39.2 39.0 54.1 52.7 6.0 4 20 38.90 4 23 52.60 B. Z. . . . 405.28 Mars . . . S.P. . Mars . . . N. . . 2.0 5-0 15.3 20.8 29.0 33.0 4 S6 15.43 4 30 19.00 B. Z. . . . 405.28 Mara . . . SP. . Mars . . . N. . . 28.7 43.1 47.1 57.0 4 32 42.93 4 37 45.42 B. Z. . . . 405.28 Mars . . . S.P. . Mars . . . N. . . 56.0 9.6 19.3 2o.O 31.0 4 40 9.53 4 42 17.51 B. Z. . . . 405.28 Mare . . . S.P. . Mars . . . N. . . 29.1 6.0 42.5 22.1 56.0 33.7 4 4J 42.53 4 47 19.85 B. Z. . . . 405.28 Mars . . . SP. . Mare . . . N. . . 31.0 9.3 45.2 25.2 58.7 37.0 4 49 44 97 4 51 23.15 2 36.878 2 39.192 2 38.009 2 36.915 2 39.322 2 36.790 2 39.250 2 37.840 2 36.800 B. Z. . . . 405.28 Mars . . . S.P. . B. Z. . . . 405.28 Mars . . . S.P 34.3 24.1 50.0 48.3 39.3 4.1 28.0 1.7 18.0 39.2 4 53 48.07 4 56 37.91 4 59 4.03 5 1 25.71 Mars . . . N. . . B. Z. . . . 405.28 37.2 5.0 5 3 51.10 Remarks. a Rejected. The dome was entirely open during these comparisons ; nevertheless, at times they were quite unsatisfactory. A 8. Results. Mean of chronometer times. Murs — » Mars S.P. — B. Z. 40f/>8 Mare N.P. — B. Z. 405.28 Tweniy-two comparisons Correction of chronometer . Twenty comparisons . . Correction of chronometer . An. A .<>. h. in. s. Thirteen comparisons ... 4 6 37.96 Correction of chronometer . -f- 2 46.40 h. in. s, Twelve comparisons ... 4 9 25.93 Correction of chronometer . -f- 2 46.40 Mars — . A a. A B. Z. . . . 523^15 Mars . . N.P. 2.5 39.2 54.1 20. S 36.0 16.0 30.1 16.0 54.2 7.5 36.2 49.5 31.0 44.0 6.0 48.0 43.0 4 15 15.97 4 16 52.60 4 19 7.47 4 23 34.45 4 25 49.47 4 27 29.50 4 29 43.97 2 35.791 2 42.649 2 35.802 2 43.923 2 35.728 2 42.521 2 35.611 2 13.52 2 14.87 2 15.02 2 14.47 8.609 6.847 8.195 6.910 B. Z. . . . 523.15 Mars . . . S.P. . B. Z. . . . 523.15 Mars . . N.P. B. Z. . . . 523.15 33 Mars . . . S.P. . 18.9 34.3 47.1 4 31 33.00 S 43.185 34 B. Z. . . . 523.15 34.3 48.0 4 33 47.97 2 35.640 2 14.97 7.545 35 Mars . . . N.P. . 3.9 19.3 31.3 4 36 17.60 2 42.691 36 B. Z. . . . 523.15 20.0 33.5 • • 4 38 33.47 2 35.657 2 15.87 7.034 37 Mars . . . S.P. . 12.2 27.3 39.0 4 40 25.60 2 43.942 38 B. Z. . . 523.15 27.5 41.3 4 42 41.37 2 35.701 2 15.67 8.241 39 Mars . . . N.P. . 11.2 26.3 38. 9 4 44 24.70 2 42.157 40 n. Z. . . 523.15 26.5 41.0 • • 4 46 40.97 2 35.490 2 16.27 6.667 41 Mars ... S.P. . 21.2 36.7 49.1 4 49 35.15 2 43.819 42 B. Z. . . . 523 15 38.0 51.2 4 51 51.17 2 35.506 3 16.02 8.313 43 Mars . . . NP. . 56.5 11.8 34.0 4 54 10.25 2 42.535 44 B. Z. . . . 523.15 53.0 4 56 36.72 45 Mars . . . N.P. . 56.8 12.0 24.0 5 0 10.40 2 42.405 46 B. Z. . . . 523.15 14.0 41.0 5 2 27.50 2 35.440 2 17.10 6.965 47 Mara . . . S.P. . 30.0 45.0 57,0 5 49 43.50 2 43.128 48 B. Z. . . . 523.15 48.5 3.0 • • 5 52 3.97 2 34.751 49 Mars . . . N.P. . 21.9 37. 2 49.3 5 54 35.60 2 41.842 50 B. Z. . . . 523.15 40.2 54.0 5 56 53.97 2 34.912 2 18.37 6.930 51 Mars . . . S.P. . 43.0 58.3 10.0 5 58 56.50 2 43.142 52 B. Z. . . . 523.15 1.2 14.5 28.2 6 1 14.63 2 34.912 2 18.13 8.330 53 Mars . . . N.P. . 48.0 4.0 15.3 6 4 1.65 3 41.707 54 B. Z. . . . 523.15 7.0 21.0 • • 6 6 20.97 2 35.039 —2 19.32 —6.668 Remarks. Night misty ; star of comparison indistinct. Between the observations of December 31 anil January 5, the chronometer was set fnrwuA 4 m. A 6. Results. Mean of chronometer time. . h. m. 8. Mar* S. P. — B. Z. 523.15 . . Thirteen comparisons . . 4 238.35 Correction of chronometer . — 1 3.10 . h. m. s. Mars N. P. — B. Z. 523.15. . Twelve comparisons . . 42548.43 Correction of chronometer . —1 3.08 A ,, Mars A a. m. B. — 2 13.73 m. s. — 2 15.11 Ac!. Rev. — 7.937 2' 2". 00 — 0".04 Rev. — 6. 78* 1' 44". 95 — 0».03 374 OPPOSITION OF MARS, 1849-50, JANUARY 9, 185O. I Chron'r time of transit. Micr. Mars — Star. T» Thermometers. 1 b o Object. A. B. C. An. l>ai. A S. Alt. Int. Ex. 1 V 1 8. s. s. h. m. s. Rev. m. s. Rev. Inches. • 0 1 Mars . . . N.P. . 55.1 10.9 22.8 2 53 8.95 2 55.391 30.164 76.0 33.0 2 B.Z. . . . 523.15 54.3 8.0 22.0 259 8.10 1 62.939 —5 59.15 —22.603 3 Mara . . . S.P. . 15.1 30.9 43.1 3 1 29.10 2 56.779 4 B.Z. . . . 523.15 15.2 29.0 42.0 3 7 28.73 1 63.064 5 59.63 23.866 5 Mare . . . S.P. . 1.8 16.2 28.9 3 11 15.35 2 56.668 6 B.Z. . . . 523.15 2.0 15.0 29.0 3 17 15.33 1 63.145 5 59.98 23.674 7 Mare . . . N.P. 42.2 57.5 9.1 3 18 55.65 2 55.545 8 B.Z. . . . 533.15 43.2 10.3 3 24 56.75 1 63.222 6 1.10 22.474 9 Mars . . . S.P. 33.1 48.3 0.9 3 26 47 00 2 56 662 10 B. Z. . . . 533.15 34.1 47.3 1.5 3 32 47.63 1 63.110 6 0.63 23.703 11 Mars . . . N.P. . 2.4 18.0 30.2 3 35 16.30 2 55.631 12 B. Z. . . . 523.15 3.7 17.0 31.0 3 41 17.23 1 63.480 6 0.93 22.302 13 Mara . . . S.P. . 13.2 28.1 40.7 3 44 26.95 2 56.662 14 B. Z. . . . 523.15 15.5 29.0 42 8 3 50 29.10 1 63.389 6 2.15 23.424 15 Mare . . . N.P. 31.1 46.2 58.7 3 54 44 90 2re 7flo • 16 B. Z. . . . 523.15 32.7 47.0 0.8 4 0 46.83 DO. /Uo ' 1 63.128 6 1.93 22.726 17 Mare . . . S.P. . 28.7 44.1 56.2 4 12 42.45 2 56.857 18 B. Z. . . . 523.15 30.9 45.0 59.1 4 18 43.00 1 63.271 6 2.55 23.737 19 Mars . . . N.P. . 0.2 15.3 27.7 4 21 13.95 2 55.880 SO B. Z. . . . 523.15 3.0 16.5 30.0 4 27 16.50 1 63.272 6 2.55 22.759 21 liars . . S.P. . 25.8 41.0 53.5 4 29 39.65 2 56.780 23 B.Z. . . . 533.15 29.1 43.0 4 35 42.91 1 63.365 6 3.26 23.666 33 Mara . . . N.P. . 47.1 2.4 14.7 4 40 0.90 2 55.710 M B.Z. . . . 523.15 49.7 3.6 18.0 4 46 3.77 1 63.190 6 2.87 22.671 25 Mars . . . S.P. . 3.2 18.3 30.3 5 16 16.70 2 59.301 96 B.Z. . . . 523.15 7.1 21.3 35.0 5 22 21.13 1 66.010 6 4.43 28.441 37 Mara . ' . . N.P. . 20.1 36.0 48.1 5 25 34. 10 2 58.122 28 B. Z. . . . 523.15 24.0 39.0 53.0 5 31 38.66 1 65.341 —6 4.56 —22.932 Remarks. The night misty ; star of comparison scarcely visible. A 7. MarsS. P. — B. Z. 523. 15 Mar«N.P — B.Z. 523. 15 Results. Mean of chronometer times. h. m. s. Seven comparisons . , . 35439.60 Correction of chronometer — 54.20 h. in. s. Seven comparisons ...41 16.39 Correction of chronometer — 54.20 Mare-. A a. A. . . +628.06 ire — * A ,5. Rev. 4.701 + 1' 12". 26 A a . . . . 0.00 0".02 m. r. . . +6 28.12 Rev. 5.906 + 1' 30". 78 A0 . 0.00 4- 0".03 376 OPPOSITION OF MARS, 1849-50, JANUARY 1*, 1850. j Chron'r time of transit. Mars — Star. Thermometers. S £ Object. A. B. C. A a. A I. Alt. Int. Ex. 6 o s. S. 8. ll. III. S. Rev. m. g. Rev. Inches. „ . 0 M 1 B. Z. . . . 396.4 0.3 12.7 27.1 4 10 13.. -17 2 35.009 +5 16.23 —3.432 30.330 69.0 33.0 19.0 2 Mars . . . S.P. . 16.2 31.4 43.0 4 15 29.60 2 38.441 3 B. Z. . . . 396.4 26.4 40.5 54.3 4 17 40.40 2 34.611 5 15.25 2.310 4 Mara . . N.P. . 42.3 58.0 9.0 4 22 55.65 2 36.921 5 B. Z. . . . 396.4 12.1 26.0 40.0 4 32 26.03 2 27.066 5 15.52 3.723 6 Mars . . . S.P. . 27 9 43.1 55.2 4 37 41.55 2 30.789 7 B. Z. . . . 396.4 26.2 39.2 53.5 4 40 39.63 2 26.890 +5 14.97 —2.349 8 Mars . . . N.P. . 41.2 57.2 8.0 4 45 54.60 2 29.2:i9 Remarks. Night very unfavorable. A 6. MareS. P. — B.Z. 396.4 MarsN. P. — B. Z.396.4 Results. Mean of chronometer time. h. m. s. Two comparisons ... 4 26 35 37 Correction of chronometer — 37.94 h. m. s. Two comparisons . . . 43425.12 Correction of chronometer — 37.93 Ap A a. m. s. + 5 15.87 Mars — * 0.00 m. s. + 5 15.11 A Murs . . . 8.P. . 15.0 28.5 41.8 9 42 28.43 3 36.749 3 B.Z. . . . 344.32 1.3 15.0 28.5 9 44 14.93 1 36.838 1 9.74 28.805 4 Mars . . . N.P. . 11.3 24.7 38.0 9 48 24.67 3 35.552 5 B.Z. . . . 344.32 19.2 33.0 46.8 9 47 33.00 1 36.890 1 9.00 30.233 6 Mars . . , S.P. . 29.0 42.0 55.0 9 48 42.00 3 37.032 7 B.Z. . . . 344.32 54.0 6.7 21.0 9 49 7.23 1 36.933 1 8.77 28.644 8 Mars . . . N.P. . 16.0 29.0 9 50 16.00 3 35.491 9 B.Z. . . . 344.32 55.0 8.0 22.4 10 8 8.47 1 38.989 1 7.66 29.467 10 Mars . . . S.P. . 3.0 16.2 29.2 10 9 16.13 3 38.358 11 B. 7.. . . . 344.32 39.2 53.0 7.2 10 10 53.13 1 36.831 1 7.64 29.452 12 Mars . . . S.P. . 47.0 1.0 14.3 10 12 0.77 3 36.192 13 B.Z. . . . 344.32 52.2 5.0 19 1 10 14 5.43 1 36.946 +1 7.07 —29.513 14 Mars . . . S.P. . 59.0 12.5 26.0 10 15 12.50 3 36.398 * All the comparisons at this opposition of Mars are taken with mean time chronometer 2019, Dent. 380 OPPOSITION OF MARS, 1851-52, JANUARY 24, 1852— Continued. 5 1 No. for reference. Object. Chron'r time of transit. Mean of wires Micr. Mars — Stur. Bar. Thermometers. A. B. C. A a. AS. Alt. Int. Ex. 8 s. 8. 1). 111. S. Rev. m. s. Rev. Inches. • • • B. Z. . . . 344.32 26. 3 U9.2 53.2 10 16 39.53 1 36.926 +1 6.54 —28.235 30.380 73.0 30.0 30.0 16 Mars . . . N.P. . 33.0 46.2 59.0 10 17 46.07 3 35.070 17 18 19 B.Z. . . . 344.32 Mars S.P 46.0 51.9 25.2 59.2 5.0 39.0 13.1 19.0 53.0 10 26 59.43 10 28 5.30 10 29 39.07 1 36.882 3 36.141 1 36.940 1 5.87 1 6.30 29.350 28.020 B.Z. . . . 344.32 20 Mars . . . N.P. . 32.0 45.1 69.0 10 30 45.37 3 34.869 SI B. Z. . . . 344.32 33.0 45.2 59.1 10 32 45.43 1 37.010 1 4.40 29.313 23 Mars . . . S.P. . 37.5 51.0 4.0 10 33 59.83 3 36.232 33 B.Z. . . . 344.32 11.0 34. 0 38.0 10 35 24.33 1 36.943 +1 5.60 —27.900 24 Mars . . . N.P. . 16.5 29.8 43.5 10 36 29.93 S 34.752 Remarks. Planet indistict and blazing. A 8. Results. Mean of chronometer times. h. m. s. Mars S. P.— B. Z. 344.32 . . Seven comparisons . . . 10 956.57 Correction of chronometer . +13.53 h. m. s. MarsN. P.— B.Z.344.33 . . Five comparisons . . . .1012 8.41 Correction of chronometer . + 13.53 Mars — • A a. A A m. s. + 1 7 47 Rev. At . . . . + 0.19 Ap . . m. s. Rev. . . +1 7 39 A( . . . . + 0.19 Ap , . 0.00 fi" 13 JANUARY 26, 1853. i c S Chron'r time of transit. Mars— Star. -j — — Thermometers. Mean of wires Micr. £ Object. A. B. C. A a. At. Att. Int. El. & i 6 . 8. 8. B. h. m. H. Rev. 8. I Rev. Inches. • • • 1 3 Washington . O. . Mars .... S.P. 30.2 44.5 57.1 11.3 9 24 43.65 9 24 57.90 4 29.762 2 34.186 + 14.25 +21.440 30.950 75.0 44.5 36.0 I 3 4 Washington . O. . Mars .... N.P. 4.2 19.2 31.2 45.3 9 26 17.70 9 26 32.25 4 29.749 2 33.029 14.55 22.584 | i 5 6 Washington . O. . Mars .... S.P. 3.7 17.2 • • 30.2 43.7 9 35 16.95 9 35 30.45 4 29.883 2 34.192 13.50 21.555 7 8 Washington . O. . Mars .... N.P. 11.4 24.7 38.0 51.2 9 37 24.70 9 37 37.95 4 29.782 2 32.963 13.25 22.683 9 10 Washington . O. . Mars .... s.P. 47.2 1.0 • • 27.9 9 39 0.57 9 39.14.45 4 29.928 2 34.018 13.48 21 .774 11 12 Washington . O. . Mar N.p. 16.2 S9.7 • • 56.0 9 40 29.57 9 40 42.85 4 29. 830 2 32.760 + 13.28 +22.934 AT THE NAVAL OBSERVATORY, WASHINGTON. 381 JANUARY 36, 1853— Continued. No. for reference. Object. Cliroif r time of transit. Mean of wires. Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. AJ. Alt. Int. Ex. s. s. h. in. s. Rev. 8. Rev. Inches. . 13 Washington . O. . 58.4 . 25.2 9 44 11.80 4 29.798 + 13.30 +21.665 30.950 75.0 44.5 36.0 14 Mars .... S.P. 12.0 38.2 9 44 25.10 2 33.997 15 Washington . O. . 24.1 , 51.0 9 45 37.55 429.738 13.05 22.932 16 Mars .... N.P. 37.2 • • 4.0 9 46 50.60 2 32.670 17 Washington . O. . 45.1 11.3 9 51 58.20 4 29.768 12.50 21.754 U Mars .... S.P. 57.2 24.2 9 52 10.70 2 33.878 13 Washington . O. . 27.2 54.3 9 54 40.75 4 29.760 11.90 23.024 20 Mars .... N.P. 39.1 6.2 9 54 52.65 2 32 600 21 Washington . O. . 7.0 . . 34.0 9 10 20.50 4 29.895 11.45 22.244 23 Mars .... S.P. 19.0 44.9 9 10 31.95 2 33.520 23 24 25 26 27 Washington . O. . Mars . . N.P. 46.0 • • 13.0 24.0 46.0 57.1 48.3 9 15 59.50 9 16 10.57 9 17 32.60 9 17 43.67 9 19 35.15 4 29.987 2 32.201 4 29.903 2 33.378 4 30.023 11.07 11.07 9.92 23.650 22.389 23.618 Washington . O. . Mara .... S.P. 19.2 • • Washington . O. . 32.0 28 Mars .... N.P. 58.5 9 )9 45.07 2 32.269 29 Washington . O. . 6.0 33.1 9 22 19.55 4 29.849 10.55 22.102 30 Mars .... S.P. 17.2 • • 43.0 9 22 30.10 2 33.611 31 Washington . O. . 37.0 4.1 9 24 50.55 4 29.929 10.15 23.519 32 Mars .... N.P. 47.2 14.2 9 25 0.70 2 32.274 33 Washington . O. . 6.5 . . 33.0 9 39 19.75 4 29.939 8.85 22.585 34 Mars .... S.P. 15.2 • • 42.0 9 39 28.60 2 33.218 35 Washington . O. . 2.3 28.3 9 42 15.30 4 29.917 +8.95 +23.843 • Mara .... N.P. 11.0 . . 37.5 9 42 24.25 2 31 .938 i Remarks. Power 300. At the twenty-ninth observation the planet had become deformed and unsteady. The remaining comparisons are worthless. A 9. Results. Mars S.P. — * W. O. Mars N. P.— • W. O. Mean of cl.ronomet.er times. A a Mars-. Ad h. m. s. 8. Rev. Ntne comparisons .... 9 58 30.32 . . . . + 12.11 + 21.945 Correction of chronometer . . + 52.43 A< . . + 0.03 + 5* 37".. 12 A f ... 0.00 + 0".10 h. m. s. «. Rev. Nine comparison* .... 10 1 6.32 . . . . +11.78 + 83.199 Correction of chronometer . . +52.43 At . . + 0.03 + 5' 55". 60 A ... 0.00 * JANUARY «r, 1858. Before star of comparison could be seen, the iky became clouded. 382 OPPOSITION OF MARS, 1851-52, JANUARY 30, 1858. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Mars— Star. Bar. Thermometers. A. B. C. A a. A ol .UoH 3 32.513 1 18.63 2.804 32 Mars . . . N.P. . 11.0 35.0 38 0 10 14 24.33 3 29.709 1 33 B. A. C. . . 2789 . 49.2 3.0 16.2 10 24 2.80 3 32.422 1 18.50 1.722 34 Mars . . . B.P. . 8.0 20.9 35.0 ! 10 25 21.30 3 30.700 35 B. A. C. . . 27?9 . 22.0 35.0 49.0 10 26 35.33 3 32.441 +1 18.67 +2.911 36 Mars . . . N P. . 40.0 51.0 8.0 10 27 54.00 3 29.530 37 Mars . . . S.P. . 18.0 t 45.0 10 30 31.50 3 30.592 : 38 Mars . . . N. o no e.fo\ 39 8.9 26 0 52.0 10 30 39.00 O %o . OoU 3 31.195 Jttmarks. Planet much deformed. At commencement of observation a ,tar of P. 9 magniiude j,,s, emerglnc from edge of planet. This star compared at end of the series. A 8. Mars S. P. — B. A. C. 2769 Mara N. P.— B. A. C. 278 AT THE NAVAL OBSERVATORY, \VASIIIXGTON. FEBRUARY 3, 1 853— Continued. Results. Mean of chronometer times. h. m. a. Nine comparisons . . . 9 46 33.59 Correction of chronometer + 57.18 h. m. a. Nine comparisons . . . 9 49 32.91 Correction of chronometer -J- 57.18 385 Mara — * A a. m. H. Rev. 1 244 At . . . . 4. 0.22 4- 19" 12 A p . . , 4- 0" 01 III. B. . . 4- 1 20 67 Rev. 2 509 A< . . . . 4. 0.22 4. 38" 57 Ap . 4- 0".01 FEBRUARY 17, 1853. flj B C E Chron'r time of tiansil. Mars— Star. Thermometers. I Object. A. B. C. A.. A.. Att. Int. Ex. 6 s. a. s. h. m. s. Rev. s. Rev. Inches. • o 0 1 B. Z. . . . 341.91 43.1 59.0 15.0 9 3 59.03 3 43.338 +45.97 +4.164 30.050 74.0 38.0 2 Mars . . . 8.P. . 39.0 45.0 1.0 9 4 45.00 3 39.074 3 B. Z. . . . 341.91 53.5 9.2 35.2 9 6 9.30 2 43.261 +46.80 +5.639 4 Mars . . . N.P. . 56.0 13.0 9 7 56.10 2 37.622 Remarks. Planet in a blaze, and uncertain ; observations impossible. A 9. FEBRUARY 95, 1852. North pole of Mars presetted a singular ring-like appearance, as if there were an elevated band in that part of the planet. Other ohservationi prevented. A 9. FEBRUARY 39, Otxrrvations for position impossible. The appearance noted on the 35th scarcely discernible. A 9. 49 INFERIOR CONJUNCTIONS OF VENUS, 1850-52. MICROMETRICAL OBSEKYATIONS, WITH THE 14 FEET EUUATOMAL, AT THE NAVAL OBSERVATORY, WASHINGTON. INFERIOR CONJUNCTION OF VENUS: 1850-51. OCTOBER It), 1850. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Venus— Star. Bar. Thermometers. A. £!. C. An. &i. Alt. Int. Ex. s. g. s. h. m. s. Rev. m. s. Rev. Inches. I • • 1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 Venus . . . S.P. 9.5 23.4 13.2 32.4 20.9 3.2 51.3 36.2 24.2 49.7 38.2 6.5 53.1 49.8 36.3 16.0 2.0 37.2 27.1 46.2 35.3 17.1 5.3 50.0 38.0 3.9 51.7 20.5 6.8 4.1 50.5 29.5 15.4 6 3 23.36 6 4 10.21 6 6 32.43 6 7 21.10 6 10 3.16 6 10 51.31 6 12 38.36 6 13 24.16 6 15 49.86 6 16 38.36 6 17 6.43 6 18 53.03 6 21 49.96 6 22 36.41 6 24 15. P6 6S5 1.81 2 28.280 2 46.345 3 30.805 3 48.421 2 30.062 2 45.274 2 29.501 2 47.522 2 29.086 2 44.479 2 28.548 2 46.140 2 27.552 2 42 897 2 26.651 —48.67 48.15 47.80 48.50 46.60 46.45 —45.95 —15.540 18.359 15.773 18.436 15.931 18.588 —18.246 59.2 50.5 Venus . . . S.P. • 18.7 7.1 49.2 Venus . . . N.P. * Venus . . . S.P. * 22.9 10.3 36 0 Venus . . . N.P. » Venus . . . S.P. 52.3 39.2 36.0 Venus . . . N.P. • Venus . . . S.P. • a.i Remarks. Planet undefined. A S. Results. Mean of chronometer limes. Ven A* h. m. s. 8. us — * A 1. Rev. — 15.872 — 4' 3". 97 — 1".64 Rev. - 18.461 Correction of chronometer . . •f- 35.56 h. m. «. 6 15 54 32 A« ... — 0.13 Ap ... — 0.08 8. Correction of chronometer . . + 35.58 A« ... — 0.13 — 4' . _ 0.09 — 300 INFERIOR CONJUNCTION OF VENUS, 1850-51, OCTOBER 21, 185O. No. for reference. Object. Chroii'r time of transit. Mean of wires. Micr. Venus— Star. Bar. Thermometers. A. B. C. A a. A S. Alt. Int. Ex. s. s. H. h. in. s. Rev. in. s. Rev. Inches. • • • 1 2 3 4a 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 34 Venus . . . S.P. * g 41.3 55.0 26.0 J9.1 46.4 37.0 29.3 2.7 32.4 25.5 32.8 3.0 55.8 43.2 12.5 5.0 42.1 10.0 3.2 24.2 51.0 45.0 14.1 41.2 33.4 8.7 40.0 32.7 0.3 51.0 43.3 16.2 46.0 39.0 47.2 16.2 9.2 57.2 26.0 19.1 56.2 24.5 17.0 38.1 5.0 58.0 28.2 55.0 47.5 5 54 55.00 5 56 26.15 5 57 19.05 5 59 6.56 6 0 37.10 6 1 29.53 6 4 2.67 6 5 32.20 6 6 25.25 6 8 33.06 6 10 2.73 6 11 55.70 6 12 43.16 6 14 12.16 C 15 5.13 6 16 42.16 6 18 10.13 0 19 3.26 6 21 24.20 6 22 51.05 6 23 44.55 6 26 14.23 6 27 41.10 6 28 33.45 2 37.338 2 43.950 3 30.376 2 34.670 2 43.300 3 29.722 2 36.014 2 42.452 3 28.902 2 32.960 2 41.791 3 S7.950 2 33.753 2 39.771 327.140 2 31.500 2 40.000 3 26.296 2 33.841 2 38.565 3 24.918 2 29.000 2 36.915 3 23.472 —1 31.15 1 30.54 1 29.53 1 29.67 1 29.00 1 27.97 1 26.85 —1 26.87 +6.612 8.630 6.438 8.831 6.018 8.500 5.724 +7.915 29.90 72 0 55.5 49.5 * 8 .... Venus . . . N.P. » 9 33.0 23.3 16.0 49.1 18.2 * 8 Venus . . . S.P. * 9 *8 Venus . . . N.P. * 9 19.2 49.0 42.1 29.1 58.0 51.3 28.2 55.9 49.6 10.3 *8 Venus . . . S.P. *9 • 8 Venus . . . N.P. *9 . . •8 Vinus . . . S.P. •9 *8 Venus . . . N.P. *9 ...... 0.4 27.1 •8 Remarks. Stars dim, and planet undefined and blurred. A 6. a The recorded reading here is corrected in the mean, it being evidently forty seconds too large. Results. Mean of chronometer times. Venus — , Venus S. P. — < Venus N.P. — < h. in. s. Four comparisons .... 6 9 45.39 Conec'.ion of chronometer . -f 29.46 h. m. g. Four comparisons .... 61239.00 Correction of chronometer . + 29.46 m. s. — 1 29.13 At .... — 0.24 0.03 m. s. . . — 1 28.76 . — 0.24 Ap . . . . + At Ap . . . . + 0.04 Rev. + 6.132 + 1' 34".26 + 0".59 Rev. + 8.469 + 2' 10". 18 + 0".81 OCTOBER 22, 1850. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Venus— Star. Bar. Thermometers. A. R. C. A a. AcJ. Alt. Int. Ex. „ 8. s. h. m. s. Rev. s. Rev. Inches. • 0 e 1 2 Venus . . . N.P. « 22.9 36.9 :,:) '.l 26.5 5 44 36.90 5 45 12.58 2 41 OJ9 2 52.419 —35.68 +11.390 29.964 75.0 63.0 62.0 AT THE NAVAL OBSERVATORY, WASHINGTON. / OC'TOBKR •: i. 1S50— Contlnnnl. No. for reference. Ohjcct. Chron'r time of transit. Meanof wirfs Micr. Venus — Star. Bar. Thermometers. A. B. C. A a. A A Alt. •Int. Ex. s. s. 6. h in. s. Rev. 9. Rev. Inches. - O • 3 4 5 B 7 8 9 10 11 12 13 14 15 16 17 18 Venus . . . S.P. * 2>.l 35.9 49.8 25.0 54.1 29.1 27.5 3.0 4.0 37.2 12.9 45.5 39.7 12.4 39.7 12.0 52.0 24.0 5 48 35.93 5 49 11.08 5 51 40. SO 5 52 15.18 5 54 13.30 5 54 49.08 5 57 49.87 5 58 23.27 5 59 59.03 6 0 31.58 6 2 26.13 6 2 58.93 6 4 25.93 6 4 58.08 6 6 37.97 6 7 10.08 •J 43.01(1 2 51.985 2 40.391 2 51.582 2 42.311 2 51.407 2 39.639 2 50.779 3 41.619 2 50.499 2 39.104 3 50.058 2 41.052 2 49.808 2 38.300 2 49.289 —35.15 34.98 35.78 33.40 32.55 32.80 32.15 —32.11 +8.975 11.191 9.096 11.150 8.880 10.954 8.756 +11.989 39.964 75.0 63.0 62.0 Vi'inis . . . N.P. 26.3 Venus . . . S.P. * 59.5 12.9 Venus . . . N.P. * 3J.1 49.5 23.1 59.0 Venus ... 8 P. * 45.2 Venus . . . N.P. * 12.5 26.2 59.1 26.1 Venus . . . S.P. . 12.0 Venus . . . N.P. * 24.0 37.9 Remarks. ' The night tolerable. The temperatures on the outside and inside of (he dome nearly equal, being 62" 63'. Still the disc of the planet tremulous, and not measurcable within tt;n seconds. A 7. VeniuS.P. — . Venus N. P. — . Results. Mean of chronometer times. Venus — * Four comparisons . . . Correction of chronometer Five comparisons . . . Correction of chronometer h. m. s. 5 57 9.72 . . + 29.38 At Aa s. — 33.91 — 0.09 h. m. s. 5 56 38.21 + 29.38 At + 0.02 s. - 33.79 — 0.09 Ap + 0.03 AS Rev. + 8.927 + 2' 17". 28 + 0".40 Rev. + 11.315 + S> 53". 92 + 0".51 OCTOBER as. 1850. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Venus — Siar. Bar. Thermometers. A. B. C. A a. A Inches. • • • 1 3 3 4 5 6 • 8 38.1 45.8 2.4 10.7 43.3 50.9 52 2 15.8 58.9 5.5 6.0 14.1 30.4 38.0 Jl.O 19.2 5 24 52.10 5 25 59.95 5 99 16.20 5 30 24.35 5 35 57.06 5 37 5.20 3 28.106 2 39.102 326.778 2 34.9-24 3 26.817 2 38. (M2 +1 7.85 1 8.15 1 8.14 +18.874 21.738 18.665 30.210 74.0 54.0 47.0 Venus . . . S.P. •8 Vcnut . . . N.P. * 8 ...... Venui . . . S.P. 7 8 9 10 n 12 "8 ...... 39.2 48.2 12.0 21.3 46.5 56.3 53.5 2.3 26.1 35.5 0.4 10.2 8.1 16.0 39.5 49.0 H.5 24.0 5 38 53.60 5 40 2.17 5 43 25.85 5 44 35.S7 5 46 0.47 5 47 10.13 3 26.358 2 31.463 3 25.589 2 36.790 3 25.192 3 33.172 1 8.57 1 9.41 + 1 9.6S 21.766 18.669 +21.890 \ Venus . . . N.P. •8 Veniu . . . S.P. * 8 Venus . . . N.P. 390 INFERIOR CONJUNCTION OF VENUS, 1850-51, NOVEMBER 9, 1850— Continued. Remarks. Planet deformed and tremulous. A 7. Results. Venus S. P. — » 8 . Venus N.r. — « 8 . Mean of chronometer times. !i. m. s. Venus — * A a. A 8 A p . . , ,4- 0 07 I" 42 h. m. s. m. s. Rev. . 5 39 12 22 . , -1-1 8 79 -J- 21 797 -f 14.51 At . . . . . .4- 0 19 ^_ 5' ;)5" 06 Ao , . 4- 0.03 4- 1' .66 NOVEMBER 10, 1830. i Chron'r time of transit. Venus — Star. Thermometers. g Micr <£ £ Object. A. B. C. A a. A S. Att. Int. Ex. 8 c s. 0. s. h. m. s. Rev. m. s. Rev. Inches. 0 0 a 1 •8 39.6 53.1 7.5 5 1 51.40 3 31.041 -f 3 25.70 +25.722 30.150 71.0 41.0 a Venus . . . S.P. 5.2 19.0 33.1 5 5 19.10 2 35.189 3 •8 56.0 9.7 24.1 5 7 9 93 3 30 690 3 27 00 4 Venus . . . N.P. 22.9 37.0 50.9 5 10 36.93 2 32.795 | 5 •8 25.0 39 " 55 7 5 13 39 % 3 30 068 6 Venus . . . S.p. 53.1 6.0 19.9 5 17 6.00 2 34.999 7 » 8 49.2 t 18.2 5 19 3.70 3 29.579 3 28.26 27.880 8 Venus . . . N.P. 18.0 31.9 46.0 5 22 31.96 2 31.569 9 * 8 12 1 °6 ° 40 3 10 Venus . . . S.P. 41.9 55.8 10.0 5 33 55.90 2 33.328 11 • 23 0 37 0 50 8 13 Venus . . . N.P. 2.0 16.2 31.0 5 37 16.40 2 29.962 13 * 43 1 14 *7.8 . . . . 15 Venus . . . s.P. 28.9 42.7 56.7 5 41 42.76 2 32.050 16 * 8 5 17 •7.8 IS Venus , , , N.P. 12.9 40.0 5 46 36.10 2 28.269 19 * 52 0 20 *7.8 . . . . 8.7 22.2 5 49 9.15 1 36.430 —2 43.05 —23.058 Remarks. The fimfour comparisons taken without illumination of the wires ; three arc good, the rest unsatisfactory. A 9. Results. Mcnn oCchronomeler times. Vcmis — * A a. A I. m. a. Rev. +327.16 + 25.247 Correction of chronometer . -f 13.07 At 4. 0.56 +6' 28". 09 4 f 4. 0.09 -f 1».84 h. m. s. \i-nus3.P._.8 . . Three comp-iriton* . . . 51847.00 v »T h. m. s. isN. P. — .8 . , Three comparisons . . . 51634.44 m. s. Rev. +3 27.63 -f- 27.822 Correction of chronometer . + 13.07 At ...... -I- 0.56 +7' 7". 66 A p 4. 0.09 + 1".93 AT THE NAVAL OBSERVATORY, WASHINGTON. 397 NOVEMBER 13, 1850. No. for reference. Object. Cliron'r time of tranj.it. .YIr;ill of wires Micr. Venus— Star. Bar. Tllcrmonieleis. A. li. C. An Ac! Alt. Int. Ex. s. s. 8. li. in. a. Kcv. in. 8. Eev. Indies. I 0 • 1 a 3 4 1 6 7 8 « 8 56.9 29.1 37.2 44.9 53.1 54.7 3.0 10.2 18.0 43.2 50.9 59.3 7.2 8.4 17.0 23 9 31.9 57.0 5.9 13.7 21.9 22 8 30.9 5 20 10.10 5 21 18.00 5 22 43.10 o 23 51.33 5 26 59.30 5 28 7.40 5 31 8.63 5 32 16.96 2 43.569 2 35.378 2 43.088 2 32.153 2 4S.960 2 34.748 2 42.400 2 31.191 + 1 7.90 1 8.23 1 8.10 1 8.33 + 8.191 10 935 8.212 11.209 30.010 71.0 55.0 48.0 Venus . . . s.r. * 8 Venn* . . . N.P. •8 Venus . . . S.P. •8 Venus . . . N.P. 9 10 11 12 13 14 15 16 "8 41.4 50.0 20.0 29.2 23.0 32.5 51.2 £9.5 55.3 3.9 34.2 43.0 37.2 46.1 6.7 14.1 9.6 18.0 48 6 56.9 51.4 0.3 19.0 27.9 5 33 55.43 5 35 3.93 5 36 34.26 5 37 43 U3 5 39 37.20 5 40 46.30 5 42 5.63 5 43 13.83 2 41.975 2 33.810 241.518 2 30.336 2 41.088 2 33.718 2 40.502 2 29.358 1 8.53 1 8 77 1 9.10 +1 8.20 8.165 11 .212 8.370 +11.140 Venus . . . S.P. «8 Venus . . . N.P. *8 Venus . . . S.P. •8 Venn* . . . N.P. Remarks. The first two comparisons without illuminalion. The night uncommonly fine and serene. All the circumstances favorable, except the inequalily of ilin external and interior temperatures, which could not have been reduced, all the doors and windows of the dome having been kept open during the \vlidle day. A 8. Results. Mean of chronometer times. Venus — * A a. Ad. h. m. s. m. 8. Rev. Venus S.P. — *8 , 53118.91 +1 8.41 + 8.234 Correction of chronometer + 12.53 A t . . . . -f- 0.19 +2' 6". 57 Ap . . . . + 0.03 + 0".68 h. in. s. m. a. Rev. VenusN.P. — .8 .... 53416.29 +1 8.38 -f. 11.124 Correction of chronometer -f. 12.53 A t .... + 0.19 +2' 50". 99 A f . . . . + 0.04 + S".91 NOVEMBER 14, 185O. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Venus— Star. Bar. Thermometers. A. D. 0. A a. A I. Alt. Int. Ex. 9. .. 6. h. in. s. Rev. s. Rev. Inches. • • | 2 3 4 5 6 V< 'HUH . . . S.P. "8 27.5 24.1 53.0 48.9 24.1 21.0 41.6 38.3 5.9 3.0 38.3 34.7 56.0 52.1 20.1 17.0 52 0 49.0 5 12 41.70 5 13 38.17 5 15 6.00 5 16 2. S6 5 17 33.13 5 18 34.90 2 30.990 2 32.599 2 27.800 2 32 300 2 30.388 2 32.060 —56.47 56.96 —56.77 +1 609 4.500 + 1.692 30.063 75.0 57.0 52.0 Venus . . . N.P. • 8 Venus . . . S.P. •8 398 INFERIOR CONJUNCTION OF VENUS, 1850-51, NOVEMBER 14, 1850— Continued. g g I | 6 7 8 9 10 11 12 13 14 15 18 Object. Chron'r time of transit. Mean of wires. Micr. Venus — Star. Bar. Thermometers. A. B. C. A a. A ,5. Att. Int. Kx. B. s. s. h. in. s. Uev. s. Rev. Inches. • « • Venus . . . N.P. » 8 27.0 24.1 23.1 19.1 53.0 48.2 49.7 40.9 37 0 35.9 33.0 6.2 2.5 3.2 59.3 34.0 29.7 55.0 53.0 51.0 47.9 19.7 16.9 17.0 13.3 48.2 43.6 5 19 40.96 5 20 37.70 5 89 37.00 5 30 33.33 5 32 6.30 5 33 2.53 5 36 3.30 5 36 59.50 5 37 34.06 5 38 29.80 2 27.SOO 2 31.850 2 28.931 2 30.942 2 25.631 2 30.522 2 28.201 2 30.149 2 24.695 2 29.688 — 56.74 58.33 56.23 56.20 —55.74 -j-4.650 2.011 4.891 1.948 -f-4.993 30.083 75.0 57.0 52.0 Venus . . . S.P. * 8 .... Venus . . . N.P. • 8 Venus . . . S.P. • 8 Venus . . . N.P. • 8 20.0 16.1 Venus S.P.—. 8 . Venus N. P. — . 8 . A 9. Results. Mean of chronometer times. h. m. s. Four comparisons . . . . 5 21 0.03 . . Correction of chronometer . . + 12.10 A* A a. s. . . — 56.44 . . — 0.15 Ap . . + 0.01 h. m. s. Four comparisons . . . . 5 26 6.83 . . Correction of chronometer . . -f. 12.10 At s. . . — 56.42 . . — 0.15 Af> . . -f. 0.02 Venus — * Rev. 1.948 27". 94 0".13 Rev. 4.759 13". 15 0".34 NOVEMBER 18, 185O. The planet deformed and tremulous. Observations impossible. A 4. NOVEMBER 21, 185O. « 6 Chron'r time of transit. Venus — Star. Thermometers. B iVIean of wires. Micr. s Object. A. B. C. A a. A, I. Att. Int. Ex. s 6 s. s. s. h. m. s. Rev. s. Rev. Inches. • • • 1 Venus . • . S.P. 33.9 48.0 1.9 4 48 47.93 2 35.480 29.990 74.0 46.8 41.0 3 B. A. C. . . . 6194 41.2 55.1 4 49 41.13 2 28.091 —53.20 —7.389 3 Venus . . . N.P. 39.6 53.9 7.5 4 50 53.67 2 32.838 4 B. A. C. . . . 6194 • • 45.8 0.1 4 51 45.92 2 28.014 52 25 4.824 5 Venus , . . S.P. 53.2 7.1 21.0 4 53 7.10 2 35.020 6 B. A. C. . . . 6194 46.0 0.1 14.0 4 54 0.03 2 27.633 52.93 7.387 7 Venui . . . N.P. 2.0 16.1 29.8 4 56 15.96 2 32.239 8 B. A. C. . . . 6194 8.7 22. 7 4 57 8.71 2 27.415 52.75 4.834 9 Venus . . . S.P. 37.2 51.0 4.9 4 59 51.36 2 35.101 10 B.A. C. . . . 6194 29.2 43.5 57.6 5 0 43.43 2 27.080 52.07 8.021 H Venus . . . N.P. 45.9 59.5 13.9 5 a 59.76 2 31.427 12 B. A. C. . . . 6194 38.2 53.3 6.0 5 352.16 2 26.788 —52.40 —4.639 AT THE NAVAL OBSERVATORY, WASHINGTON. 399 NOVEMBER HI, 185O— Continued. No. for reference. Object. C'hron'r time of transit. Mean of wires Micr. Venus —Star. Bar. Thermometers. A. 1). C. A a. A % 2 56.259 —21.87 22.20 21.60 —21.83 +3.759 6.931 3.943 7.119 3.914 6.919 3.731 7.110 3.788 7.071 3.646 7.148 3.847 6.872 3.676 +6.903 29.930 74.0 53.0 46.0 Venus . . N. . . Lalande . . 31543 . Venus . . S. . . • • 5.5 17 36 5.5 • • 22.2 • • 17 40 S2.2 Venus . . N. . . Lalande . . 31543 . Venus . . S. . . Lalande . . 31543 . V«nu» . . N. . . Lalande . . 31543 . Venus . . S. . . Lalande . . 31543 . Venus . . N. . . • • 4.2 • • 17 41 4.2 • • 25.2 55.0 15.2 17 44 25.2 17 44 55.0 17 47 15.2 39 2 • • 17 48 39.2 Lalande . . 31543 . Venus . . F. . . Lalande . . 31543 . Venus . . P. . , Lalande . . 31543 . Venus . . F. . . Lalande . . 31513 . Venus . . F. . . Lalande . 31543 . Venus . . S. . . Lalande . . 31543 . Venus . . N. . . 36.2 58.0 2.2 24.0 12.5 34.3 35.2 57.0 49.2 11.0 15.2 37.0 25.7 47.2 48.3 3.7 2.0 24.0 29.0 50.0 39.0 0.5 J.O 23.0 17 50 49.13 17 51 11.00 17 54 14.80 17 54 37.00 17 55 25.73 17 55 47.33 17 56 48.17 17 57 10. CO 17 58 3.7 20.2 17 59 20.2 Lalande . . 31543 . Venus . . S. . . Lalande . . 31543 Venus . . N. . . Lalandc . . 31543 . Venus . . S. . . Lalande . . 31543 . • • 43.5 • • 18 0 43.5 •' • 14.0 1.3 • • 18 2 14.0 18 9 1.3 Venus . . N. . . Lalamle . . 31543 . Venus . . S. . . 23.0 18 10 23.0 • • 51.2 18 11 51.2 Vcmis . . N. . . Lalnnde . . 31543 , • • 3.0 • • 18 13 3.0 AT THE NAVAL OBSERVATORY, WASHINGTON. 403 JANUARY 15, 1851— Continued. aj V c E i E 1 d Z 41 43 43 44 45 •16 IT 48 49 50 51 52 53 54 55 56 57 n 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 • 86 87 88 Object. riinin'r linn' i>f transit. Mean of wirey. Uter. Mars— Star. B-ir. Thermometers. A. B. C. A a. A 4. Alt. Int. Ex. s. s. s. ll. III. S. Rev. s. Rev. Inches. • • • Venus . . S. . . Lalande . . 31513 . Venus . . N. . . Lalamlc . . 31543 . Venus . . S. . . 23.2 18 13 23.2 2 52.T.IO 2 56.342 2 49.648 2 56.572 2 52.865 2 56.700 2 49.810 2 56.759 2 53.384 2 57 030 —20.25 20.20 19 86 19.57 18.25 18.14 19.00 —18.20 +3.552 6.924 3.835 6.949 3.646 6.785 3.708 6.770 3.599 6.719 3.584 6.725 3.704 6.658 3.446 +S.717 29.930 74.0 53.0 46.0 15.0 18 14 15.0 • • 14.2 18 15 14.2 Vnius . . N. . . Lalande . . 31543 . Vi mis . . F. . . r,iil.mdc . . 31543 . Venus . . F. . . Lalande . . 31543 . Venus . . F. . l.alamlr . . 31543 . Venus . . F. . . Lalandu . . 31543 . Venm . . S. . , I.alande . . 31543 . Venus . . N. . . Lalande . . 31543 . VrniH . . S. . . • • 9.2 18 16 9.2 49.5 0.9 12.4 33.0 19.2 39.0 2.7 23.2 13.8 34.0 2.i.l 45.1 31.7 51.5 8.0 16.0 36.0 26.9 47.1 38.0 58.0 45.0 4.1 18 19 2.73 18 19 23.98 18 20 13.53 18 SO 33.73 18 21 25.17 18 21 45.03 18 22 31.96 18 23 51.53 18 2t 8.0 47.0 18 25 47.0 2 50.347 2 57.132 2 53.649 2 57.357 2 50.648 2 57.418 2 53.8-19 2 57.438 2 50.839 2 57.558 2 53.978 5 57.562 2 50.803 2 57.528 2 54.008 2 57.713 2 50.975 2 59.631 2 54.209 3 57.655 2 51.022 2 57.739 1.0 - • • 1833 1.0 Venus . . IV. , Lalandc . . 31543 . Venus . . S. . . Lalande . . 31513 . Venus . . N. . . Lalande . . 315)3 • • 20.9 18 34 20.9 57.0 18 35 57.0 • • 2.9 18 37 2.9 18 38 29.2 Venus . . a. . . Lalande . . 31543 . Venus . . N. . . Lalande . . 31543 . Venus . . S. . . Lalande . . 31543 . Venus . . N. . . Lalande . . 31543 . Venus . . F. . . Lalandn . . 31543 . Venus . . F. . . Lalande . . 31543 . Venus . . F. . . Lalande . . 31543 . Vrnns . . F. . . Lalande . . 31543 . Venus . . S. . l.:ilamlc . . 31543 . \Vnin . . N. . . Lalande . . 31543 . • • 29.2 • • • • 27.2 18 39 27.2 • • 1.8 18.2 18 42 1.8 18 43 18.2 28.2 43.9 2.0 19.5 49.2 7.0 41.0 59.0 57.0 14.8 32.3 1.2 19.8 14.0 54.0 12.5 9.6 28.1 45.2 4.2 14.8 33.0 18 44 41.07 18 44 59.32 18 45 56.83 18 46 14.97 18 47 32.33 18 47 51 .33 1849 1.73 18 49 19.93 18 50 14.0 • • 23.0 . • IS 51 23.0 404 INTERIOR CONJUNCTION OF VENUS, 1850-51, JANUAKY 15, 1851— Continued. Remarks. Throughout these comparisons the planet was flickering and undefined. The four last taken without illumination of the wires. A 6. a This comparison is the first at which the star wns distinctly seen. Venus F. — Lalandc 315 13 Venus 8. — Lalande 31543 Venus N. —Lalande 31543 Results. Mean of clironomer times. ti. in. s. Twelve comparisons . . 18 20 38.60 Correction of chronometer 4- 15.12 h. in. B. Sixteen comparisons . . 18 12 24.25 Correction of chronometer 4- 15,12 h. m. s. Sixteen comparisons . . 18 13 35.46 Correction of chronometer 4- 15.12 V. enus — * A a. s. 20.081 0.05 0.01 Ac>. Rev. 3.711 57' '.04 o».n Rev. 6.879 ' 45". 74 0".18 A( A f A p Ap . 4- JANUARY HI, 1851. No. for reference. Object. Chron'r time of transit. Mean of wires „,„. Venus — Star. Bar. Thermometers. A. B. C. A a. A* Att. Int. Ei. s. s. s. h. m. s. Rev. s. Rev. Inches. • • • 1 2 Taylor . . . 8219 Venus . . . S. . 2 33.075 2 36.141 . . . —3.066 30.350 70.0 42.0 30.0 . • 44.0 17 59 44.0 3 4 Taylor ... 8219 Venus . . . N. . . t 51.5 • • 18 051.5 2 33.172 2 33.605 . . . 0.433 5 6 7 8 Taylor . . . 8219 Venus . . . S. . Taylor . . . 8219 Venus . . . N. . • • 2.0 • • 18 2 2.0 2 33.165 2 36.329 2 33.310 2 33.685 • . . 3.164 0.475 . . 59.0 18 3 59.0 9 10 Taylor . . . 8219 Venus . . . S. . 21.0 18 5 21.0 2 33.252 2 36.419 . . . 3.167 11 12 Taylor , . .8219 Venus , . . N. . ..i . 20.0 .. .. 18 6 20.0 2 33.313 S 33.710 0.398 13 14 Taylor . . . 8219 Venus . . . s. . '.-. 2 33.581 2 36.618 3.037 • • 59.0 . . 18 7 59.0 15 16 Taylor . . . 8219 Venus . . . N. . 2 33.489 2 33.920 . . . —0.431 • • 3.0 . . 18 9 3.0 17 18 Taylor . . . 8219 Venus . . . F. . 56.0 16.9 9.0 29.5 43.2 18 10 9.17 18 10 29.87 . . . +20.70 19 30 Taylor . . . 8219 Venus . . . F. . 13.0 34.3 26.0 47.3 0.2 18 11 25.97 18 11 47.37 21.30 91 93 Taylor . . . 8219 Venus . . . F. . 34.7 56.0 47.5 9.1 22.0 18 13 47.58 18 14 9.03 . . . 21.45 33 24 Taylor . . . 8219 Venus . . . F. . 46.0 8.2 59.2 21.0 33.9 18 14 59.03 18 15 21.03 . . . +22.00 AT THE NAVAL OBSERVATORY, WASHINGTON. 405 JANUARY : 1 . 1851— Continued. Remarks. Planet very restless, and star of comparison dimly seen. The star used may not be the star of the catalogue ; it was taken a« the brightest in the viciniljr. A 5. Results. Mean of chronometer times. Venus — * A a. Ac!. li. m. s. s. Venus F. —Taylor 8219 . . Four comparisons ... 18 1258.80 +21.36 Correction of chronometer -f- 19.19 A( + 0.05 Ap 0.00 h. m. s. Rev. Venus S. —Taylor 8319 . . Four comparisons ... 18 346.05 , — 3.108 Correction of chronometer + 19.19 — 47". 77 A p — 0".09 h. m. s. Rev. Venus N. —Taylor 8219 . . Four comparisons ... 18 5 3.37 — 0.434 Correotion,of chronometer +19.19 — 67.67 Ap — 0".01 INFERIOR CONJUNCTION OF YENUS: 1852. MAY 31, 1853. s Chron'r time of transit. Venus— Star. Thermometers. e Mpan of \virpe Micr. Bar. 1 £ Object. A. B. C. An. A I. Alt. Int. Ex. a 6 s. g 8. h. m. s. Rev. B. Rev. Inches. 0 0 0 2 1 Venus . . . 8. P. . 0.0 15.4 31.0 7 54 15.47 3 42.912 • 29.970 72.0 70.0 64.0 2 B. Z, . . . 339.86 54.0 10.0 7 54 54.27 1 41.542 —38.80 —31.461 3 Venus . . . N.P. . 29.1 45.0 0.8 7 56 44.97 3 40.775 4 B.Z. . . . 339.86 23.0 38.5 7 57 22.82 1 41.470 37.85 29.396 5 Venus . . . S.P. . 52.0 7.1 23.0 8 0 7.37 3 42.968 6 B.Z. . . . 339.86 1.0 8 0 45.27 1 41.366 37.90 31.693 7 Venus . . . N.P. . 35.4 51.0 7.1 8 1 51.17 3 40.898 8 B. Z. . . . 339.86 29.0 44.2 8 2 28.72 1 41.521 37.55 29.468 9 Venus . . . S.P. . 17.2 31.9 48.0 8 4 32.37 3 42.961 10 B. Z. . . . 339.85 9.0 35.0 8 5 9.42 1 41.552 37.05 31.500 11 Venus . . . S.P. . 31.9 48.0 3.0 8 11 47.63 3 43.101 12 B.Z. . . . 339.86 • • 24.0 39.2 8 12 23.73 1 41.094 36.10 32.108 13 Venus . . . N.P. . 25.9 42.1 57.2 6 13 41.73 3 41.089 14 B.Z. . . . 339.86 17.0 33.0 8 14 17.08 1 41 .245 35.35 29.935 15 Venus . . . S.P. . 22.0 37.5 53.0 8 15 37.50 3 43.280 16 B.Z. . . . 339.86 13.0 29.0 8 16 13.35 1 41.152 35.85 33.219 17 Venus . . . N.P. . 35.0 50.2 6.0 8 17 50.40 3 41.152 18 B.Z. ... 339.86 • • • • 41.2 8 18 25.65 1 41.058 35.25 30.185 19 Venus . . . S.P. . 38.0 54.1 9.7 8 19 53.93 3 43.256 90 B. Z. . . . 339.86 29.9 45.0 820 29.13 1 40.971 35.20 32.376 21 Venus . . . N.P. . 11.2 97.0 42.9 8 91 27.03 3 41.095 93 B.Z. . . . 339.86 • • 1.3 17.5 829 1.48 1 40.975 34.45 30.211 S3 Venus . . . S.P. . 31.9 47.2 3.0 8 23 47.37 3 43.260 24 B.Z. . . . 339.86 21.5 37.5 8 24 21.77 1 40.888 34.40 32.463 as Venus . . . N.P. . 24.5 40.0 55.3 8 25 39.93 3 41.120 36 B. Z. . . . 339.86 14.3 30.0 8 26 14.43 1 40.801 34.50 30.410 37 Venus . . . S.P. . 45.1 0.8 16.2 8 28 0.70 3 43.248 28 B.Z. . . . 339.86 • • 34.0 49.5 8 28 33.95 1 40.705 33.25 32.634 39 Venus . . . N.P. . 33.4 49.1 5.0 8 29 49.16 3 41.210 30 B.Z. . . . 339.86 • • 32 5 38.0 8 30 22.36 1 40.615 —33.90 —30.686 A 10. Results. Mean of chronometer times. h. m. s. Venus S. P. —B. Z. 339.86 . Eialit comparisons . . . 81215.39 Correction of chronometer — 1 LiO.r.n Venus — * AJ Ap A a. — 36.07 — 0.10 Ac!. Rev. — 32.057 —8' 12". 75 — 0".3I INFERIOR CONJUNCTION OF VENUS, 1852. 407 Venus N. P. — B. Z. 339. a MAY 31, 1853-ContIiuird. Results — Continued. h. in. s. Seven comparisons . . . 8 15 17.77 Correction ot' chronometer — 1 30.59 s. Her, 30 041 A ( . . . . . 0 09 7' 41' 77 Ap . — 0.01 0".29 JUNE 3, 1858. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Venus — Star. Bar. Thermometers. A. B. C. A a. AS. Att. Int. Ex. s. s. s. h. m. s. Rev. m. s. Rev. Inches. • 8 - 1 2 Lalitnde . . 15518 Venus . . . S.P. . 40.2 48.0 55.2 59.0 11.0 10.0 8 50 55.47 8 53 59.00 2 42.098 2 42.765 +2 3.53 —0.667 3 4 LalHnde . . 15548 Wims . . . N P. . 10.2 13.9 26.2 29.1 41.0 45.1 8 54 25.80 8 56 29.37 2 41.804 2 40.334 +2 3.57 +1.470 Remarks. Clouds all round, near the horizon. A 10. Correction for chronometer, — 1m. 30s. 35. .MM: .-.. is-. ;. I No. for reference. Object. Chron'r time of transit. Mean of wires Micr. Venus — Star. Bar. Thermometers. A. B. C. An. A 1. Att. Int. Ex. 8. s. s. b. in. s. Rev. m. s. Rev. Inches. 0 • | 1 B. A. C. . . 2700 . 20.2 36.0 51.0 7 35 35.73 1 44.298 +3 58.37 —48.220 29.990 70.0 61.0 61.0 2 Venus . . S.P. . 18.9 33.9 49.5 7 39 34.10 4 49.541 3 B. A. C. . . 2700 . 16.2 31.0 ( 7 40 31.42 1 44.191 3 59.05 46.114 : Venus . . N.P. . 14.8 30.5 46.1 7 44 30.47 4 47.328 5 B. A. C. . . 2700 . 10.2 25.7 41.2 7 49 25.70 1 43.958 4 0.07 48.758 6 Venus . . S.P. . 10.5 25.8 41.0 7 53 25.77 4 49.739 7 B. A. C. . . 2700 . 6.2 21.2 37.0 7 55 21.47 1 43.970 4 0.90 —46.597 H 11 Z. ... 279.19-2 5.0 21.0 7 57 5.37 4 49.580 2 17.00 + 1.990 9 Venus . . N.P. . 7.1 22.0 38.0 7 59 23.37 4 47.590 l | 10 B. Z. . . . 279.192 11 Venus . . S.P. . 41.9 59.0 57.0 15.0 12.0 30.2 8 0 56.97 8 3 14.73 4 49.456 4 50.009 2 17.76 — 0.553 12 B. Z. . . . 279.193 55.1 10.5 26.0 8 5 10.53 4 49.262 2 18.44 — 0.757 13 Venus . . S.P. . 13.2 29.0 44.7 8 7 28.97 4 CO. 019 11 11. Z. ... 279.192 36.8 52.3 8.2 8 8 53.43 4 49.261 2 19.30 + 1.563 ].'. Vi-nns . . N.P. . 56.0 12.0 27.2 8 11 11.73 4 47.698 16 11. '/.. . . . 279.193 47.2 3.1 18.5 8 20 2.93 4 48.903 2 20.94 — 1.379 17 Venus . . S.P. . 8.1 22.9 i 39.1 8 22 23.37 4 50.282 18 B. Z. . . . 279.192 41.0 56.2 19.1 8 23 56.57 4 48.608 2 20.95 + 0.827 19 Venus . . N.P. . • • 17.5 3H.1 8 26 17.52 4 47.981 2(1 B. Z. . . . 279.192 38.1 54.0 9.2 8 21 53.77 4 48.729 2 21.30 -f 0.904 21 Venus . . N.P. . 59.2 15.0 31.0 8 30 15.07 4 47.825 22 B.Z. . . . 879.192 38.2 53.0 9.0 8 31 53.40 4 48.579 2 21.60 — 1.693 23 Venus . . S.P. . 0.0 14.0 31.0 8 34 15.00 •1 UO.ttS 24 B.Z. . . . 279.192 43.0 58.2 14.0 8 36 58.40 4 48.338 +2 22.33 - 1.751 2.j Vi'iius . . S.P. . 5. -a 21.0 35.0 8 39 20.73 4 50.089 408 INFERIOR CONJUNCTION OF VENUS, 1852, .MM: 5, 185%— Continued. No. for reference. Object. Chron'r lime of transit. Mean of wires. Micr. Venus — Star. Bar. Thermometers. A. B. C. A a. A, iw:_« oiilm.i, .1. No. for reference. Object. Chron'r time of transit. Mean of wires Micr. Venus — Star. Bar. Thermometers. A. B. C. A a. A*. Alt. Int. Ex. s. s. s. h. m. s. Eev. m. a. Rev. Inches. e • a 21 Lalande . . 1C236 46.0 1.0 17.0 839 1.33 3 35.740 + 1 45.17 +2.028 29.792 73.0 64.0 64.0 23 . . . N.P. 30.6 46.7 2.2 8 40 46.50 3 33.712 23 24 a 25 Lalande . . 16236 Venus . . . S.P. 4.5 20.2 35.0 8 42 19.90 3 35.543 3 36.229 3 35.118 + 1 46.40 —0.686 —0.847 Lalande . . 16236 45.5 1.0 16.2 8 46 0.90 26 Venus . . . S.P. 32.0 47.0 2.9 8 47 47.30 3 35.959 Remarks. The only satisfactory comparisons are the first two. The first four taken without illumination. A 9. « Wires misread; rejected. Results. .MUK S. P. — Lnlandc KM! Venus N. P. — Lalande 16236 Mean of chronometer times. h. m. s. Vernw — • An. Ad. m. s. Rev. + 1 43 79 + 0 126 Correction of chronometer . — 1 30.98 A ( .... . + 0.28 Ap +. 0" 00 h. m. s. m. s. Rev. + 1 43.26 + 2.806 . + 0.28 +43". 13 Ao •4- 0".04 JUNE 1O, 1853. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Venus — Star. Bar. Thermometers. A. It. C. A a. A S. Att. Int. Ex. 8. s. B. h. m. 8. Hev. m. a. Rev. Inches. • • • 1 *8.9 14.3 30.6 46.0 8 8 30.30 3 35.595 +1 58.60 + 2.953 2 Veniu . . . N.P. 13.9 98.8 4't.O 8 10 28.90 3 32.642 3 *8.9 45.5 0.5 16.0 8 13 0.67 3 35.361 +1 59.57 -f 0.082 4 Venus . . . S.P. 45.0 0.1 8 15 0.22 3 35.279 5 B. Z. . . . 278.32 58.0 14.0 8 15 58,42 1 35.319 —0 58.00 —30.051 Remarks. Wind very high. Planet tremulous A.I;. Correction for chronometer — 1m. 31t.52. 52' 410 INFERIOR CONJUNCTION OF VENUS, 1852, JUNK 11. 1853. No. for icrerence. OllJCCt. Ciiruii't time of transit. tlean of wires j Slier. Venus— Star. Bar. Thermometers. A. 1!. C. A a. At. Att. Int. Ex. 8. s. a. h. m. 9. Rev. m. s. ! Rev. Inches. • • • 1 Venus . . . N.P. 20.4 35.5 51.0 85235.63 4 45.035 30.250 70.0 66.0 2 Lalande . . 16582 17.9 33.2 49.0 8 55 33.37 2 42.870 —2 57.74 —29.029 3 Venus . . . S.P. 27.5 42.5 57.5 8 58 42.50 4 48.782 j 4 Lalande . . 16562 25.2 39.7 55.0 9 1 39.97 2 41.632 2 57.47 33.014 5 Venus . . . N.P. 53.1 8.1 . 9 3 8.55 4 4S.160 6 Lalande . . 16583 49.5 4.6 20.9 9 6 5.00 2 41.562 2 56.45 30.4G2 7 Venus . . . SP. 7.9 23.0 9 8 23.20 4 48.782 8 Lalande . • 16582 4.0 19.5 35.0 9 11 19.50 2 41.442 2 56.30 33.204 9 Venus . . . N.P. 50.0 5.2 20.4 9 15 5.20 4 46.369 10 Lalande . . 16582 46.1 1.0 16.0 9 19 1.03 2 41.260 2 55.83 30.973 11 Venus . . . S.P. 45.0 0.3 15.7 9 20 0.33 4 49.029 13 Lalande . . 165t2 40.7 58.0 11.0 9 2355.90 2 41.100 2 55.57 33.793 13 Venus . . . N.P. 21.5 36.0 51.9 9 26 36.47 4 46.501 14 Lalande . . 16582 16.0 31.2 46.2 9 29 31.13 2 40.788 2 54.66 31.577 15 Venus . . . S.P. 49.1 4.1 20.0 9 31 4.40 4 48.S99 16 Lalande . . 16582 42.6 58.2 13.7 9 33 58.17 2 40.678 2 53.77 34.085 17 Venus . . . N.P. 7.1 23.0 37.9 9 36 22 66 4 26.181 18 Lalande . . 16582 1.2 17.0 33.0 9 39 16.73 2 40.288 2 54.07 31.757 19 Venus . . . S P. 31.9 47.0 2.0 9 40 46.97 4 48.612 SO Lalande . . 16582 23.0 40.0 55.5 9 43 40.17 2 39.905 —2 53.20 —34.571 Remarks. Planet tremulous. Results. Mean of chronometer times. Venus — » V«nus S. P. — Lalande 16562 Venus N. P. — Lalande 16583 1). m. s. Five comparisons . . . . 9 19 47.48 Correction of chronometer . —131.49 h. m. s. Five comparisons . . . . 9 16 7.80 Correction of chronometer . —131.49 A a Acen observed in the daylight with i Cancri, but it rained or was cloudy all dn JUSTE 25, 1853. Observations commenced ; but before any comparisons could be made, the planet became too undefined and tremulous. A 7. JUNE 36, 1853. No. tor reference. Object. Chron'r time of transit. VIean of wires. Micr. Venus — Star. Bar. Thermometers. A. R. C. A a. Ai. Alt. Int. Ex. s. s. 8. h. m. s. Rev. m. s. Rev. Inches. 0 ' • 1 Venus . . . N.P. . 43.0 58.0 13.0 8 59 58.00 3 41.068 30.168 73.0 68.5 2 3 4 B. Z. . . . 274.30 Venus . . . 8. P. . 3.5 57.9 18.2 19.0 12.8 32.9 31.0 28.0 48.6 9 2 ie.83 9 4 12.90 9 6 33.23 4 36.532 3 43.841 4 35.948 —2 20.83 2 20.33 +8.351 4.994 D. Z. . . . 274.30 5 Venus ... N.P. . 56.9 13.1 26.7 9 8 11.90 3 38.422 6 B.Z. . . . 274.30 17.5 32.0 48.0 9 10 32.50 4 33.698 2 20.60 8.163 7 Venus . . . 8. P. . 58.0 13.0 28.0 9 14 13.00 3 41.018 8 B. Z. . . . 274.30 17.8 33.0 48.0 9 16 32.93 3 45.709 2 19.93 5.309 9 Venus . . . N.P. . 3.0 17.9 33.0 9 19 17.96 4 37.048 10 B.Z. ... 274.30 38.5 54 0 9 21 38.76 4 31.760 —2 20.80 +7.599 Remarks. These observations without illumination. The planet tremulous and uncertain. A 16. Correction for chronometer — Im. 25s. 23. JtJJfE 37, 1853. jj Chron'r time of transit. • Venus — Sen. Thermometers. I ' \f(il»n r»f « ' Ml I | Object. A. B. G. A a. A ,5. Alt- rm. Ex. & 8. ,. 8. h. m. s. Rev. m. 9. Rev. Inches. • 0 • 1 Venus . ' . . S.P. . 32.0 47.0 2,9 7 53 47.30 4 41.719 2 B.Z. . . . 274.33 30.0 35.2 51.0 7 57 35.40 2 46.099 —3 48.10 —21.484 3 Venus . . . N.P. . 26.0 41. 0 56.0 8 0 41.00 4 37.11 ii 4 B. /. . . . 274.33 14.0 29.0 44.0 8 4 29.00 2 45 173 —3 48.00 -18.641 AT THE NAVAL OBSERVATORY, WASHINGTON. JUNE: fit, i85a— conuum-ii. Remarks. High winds and clouds. A 7. Correction for chronometer — 1m. 24».02. 413 JUNE 39, Star of comparison H.n visible. A 10. The planet wj)s also observed on the 3d, 3d, 4th, 5th, 6th, 7th, and 9lh of July, but on none of these days were the observations of the slightest vnluo. observations were ;ilso attempted on the 14lh, 15th, 17th, 26th, 29th, 30th, and yist of August, and on the 1st, 3d, 5th, 7th, and 13tll of Sep- tember. Those of the 26th and 29th of August, and 5tli of September, which follow, are the only ones in which any comparisons could be made. AUGUST J3G, 1853. 8 Chron'r time of transit. Venus — Star. Thermometers. V ) . Mpin of w'rp Micr. Rnr 1 Object. A. D. C. A a. A J. Daft Alt. Int. Ex. 1 1 s. s. 3. ll. 111. S. Rev. m. s. Rev. Inches. i • • 1 Lalandi; . . 15125 . 36.1 fll.O 6.0 15 25 51.03 3 46.580 +3 2.97 +14.297 29.810 79.0 82.0 1 WMIIS . . S.F. . 39.0 54.0 9.0 15 28 54.00 2 45.260 3 Lalande . . 15125 . 35.9 51.0 6.0 15 30 50.97 3 47.449 3 3.03 17.398 4 Venus . . N.F. . 39.0 54.0 '.Ml 15 33 54.00 2 43.028 5 Lalande . . 15125 . 2.0 17.11 3-J.O 15 35 17.00 3 47.992 3 3.90 14.699 6 Venus . . S.F. . 6.0 20.8 15 38 20.90 2 46.270 7 Lalande . . 15125 . 42.0 56. a 11.0 153956.40 3 48.550 3 3.76 17.557 8 Venua . . N.F. . 45.5 0.0 15.0 15 43 0.16 2 43.970 D Lalande . . 15125 . 42.0 57.0 12.0 15 46 57.00 3 49.114 3 4.53 14.743 10 Venus . . S.F. . 46.8 1.3 16.5 1550 1.53 2 47.348 11 Lalande . . 15125 . 9.1 24.6 39.4 15 51 24.37 3 49.551 3 4.89 17.618 ia Venus . . N.F. . 14.2 29.3 41.3 15 54 29.26 2 44.910 13 Lalande . . 15125 . 57.0 12.0 27.0 15 55 12.00 3 49.821 3 5.13 14.910 14 N'inis . . S.F. . 2.1 17.3 32.0 15 58 17.13 2 47.888 15 Lalande . . 15125 . 26.3 41.2 56.2 16 0 41.23 3 49.972 +3 5.77 +17.471 16 Venus . . N.F. . 32.0 47.1 1.9 16 347.00 2 45.478 Remarks. The planet very tremulous. Observations altogether unsatisfactory. A Results. Mean of chronometer limes. li. m. s. V< mi:- S. P. — Ltilande 15125 . Four com parisonn . . . 154353.39 Correction ot chronometer — 15.81 li. in. «. Venus N.F. — Lalande 15125 . Four comparisons . . . 154847.60 Correction uf chronometer — 10. HI Venus — • A a. A I. m. «. Rev. +3 4.13 + 14.662 A t . . . + 0.50 +3' 45". 37 A p . . . . - 0.02 + 0".31 m. >. Rev. +3 4.36 + 17.511 A (..,.+ 0.50 +4' 29 '.19 A p .... — 0.02 + 0".43 414 INFERIOR CONJUNCTION OP VENUS, 1852. AUGUST 29, 1853. No. for reference. Object. Cliron'r time of transit. Mean of wires. Micr. Venus— Star. Bar. Thermometers. A. B. C. A a. A S. At,. Int. Ei. s. e. s. b. m. g. Rev. m. s. Rev. Inches. • • • 1 2 • 9 24.0 44.0 39.3 53.5 14.6 15 27 38.90 15 31 59.30 3 32.932 +4 20.40 5 28.4U5 —38.599 30.200 69.0 72.0 Venus . . . S.F. 3 4 5 Venu» . . . S.F. B. A. C. . . . 2639 30.5 55.5 45.5 5.0 10.3 59.5 20.0 25.8 15 37 45.16 15 38 5.16 15 40 10.53 5 28.932 2 26.712 5 26.532 —20.00 45.256 Venus . . . N.F. 6 B. A. C. . . . 2639 15.0 29.6 44.5 15 40 29.70 2 26.712 19.17 43.216 l 7 Venus . . . S.F. 1(2.6 27.1 42.3 15 42 27.33 1 5 39.548 ! | 8 B. A. C. . . . 2639 32.0 46.4 1.7 15 42 46.70 2 27.200 19.37 45.384 9 Venus , . . N.F. 20.8 35.5 50.6 ; 15 44 35.63 5 26.885 10 B. A. C. . . . 2639 39.0 54.1 9.1 15 44 54.07 2 27.342 18.44 42.579 11 Venus . . . S.F. 39.7 54.6 9.0 15 46 54.43 5 29.882 12 B. A. C . . . 2639 59.0 13.0 28.2 15 47 13.40 2 27.480 18.97 45.438 13 Venus . . . N.F. 49.7 4.2 19.3 15 49 4.37 5 27.200 14 B. A. C. . . . 2639 8.7 33.0 38.0 15 49 23.23 2 27.660 18.88 42.576 15 Venus . . . S.F. 18.3 37.0 48.5 15 52 33.40 5 30.222 j 16 B. A. C. . - . 2639 33.2 51.7 6.5 15 52 51.40 2 27.969 18.00 45.289 '. Venus . . . N.F. 43.0 57.3 12.2 15 54 57.17 5 27.552 B. A. C. . . . 2639 0.0 15.0 30.0 15 55 15.00 2 27.960 —17.83 —42.628 Remarks. The star nearest the planet was compared. The observations are, however, unsatisfactory— the planet being lambent and wavering. A 6. Results. Mean of chronometer times. A a. A S. h. m. s. ,. Rev. VenusS. P. — B. A. C. 2639 . Four comparisons . . . 154455.08 —19.08 — 45.342 Correction of chronometer — 13.69 At 0.05 —11' 36''. 96 Af> + 0.05 — 1 .12 h. m. s. a. Rev VcnusS.F. — B. A. C. 2639 . Four comparisons . . . 154711.92 18.57 — 42749 Correction of chronometer — 13.69 A( — 0.05 —10' 57'. 10 A f -f 0.04 -f- 1".08 SEPTEMBER 5, 1858. No. for reference. Object. Chron'r time of transit. Mean of wires. Micr. Venus — Star. Bar. Thermometers. A. B. C. A a. A 1. Air. Int. he. s. 8. 8. h. m. s. Rev. in. s. Rev. Inches. • • • 1 3 3 4 1 6 Venus . . . S.F. • • • 15.0 52.0 22.0 59.1 35.0 5.0 30.0 7.0 38.0 14.0 49 0 20.0 10 9 15.00 10 10 52.00 10 11 22.50 10 13 59.07 10 15 34.52 10 16 5.02 2 26.745 5 25.365 5 26.028 2 24.368 5 25.751 5 25.295 —1 37.00 2 7.50 1 35.45 —2 5.95 +42.656 43.319 44.419 +44.963 4) Venus . . . N.F. » 44.1 » Remarks. Observations unsatitfactorj-. Correction for chronometer + 10«.49. A 6. OPPOSITION OF MAES, 1849--50. DIFFERENTIAL OBSERVATIONS, WITH THE 23 FEET EQUATORIAL, AT THE OBSERVATORY, CAMBRIDGE, MASS., BY PROF. WM. CRANCH BOND. OPPOSITION OF MARS: 1849-50. INTRODUCTORY REMAKES TO THE CAMBRIDGE OBSERVATIONS. Observations upon Mars and comparison stars, made at the Observatory of Harvard Col- lege, 1849-50. The following observations upon Mars and comparison stars in its neighborhood were made at Cambridge, with the 23-fcet Equatorial, in the autumn and winter of 1849-50. The imme- diate object proposed in undertaking them was the determination of the parallax of the planet by differential observations. Those in declination were intended for comparison with corre- sponding ones made by the Expedition sent by the American government to Chile, under charge of Lieut. J. M. Gilliss, U. S. N. The Right Ascension observations afford data also for deducing the parallax, by comparing the place of the planet at the evening and morning observations, when occupying a large hour angle west and east of the meridian. They arc comprised in three divisions, viz : Comparisons of the planet with neighboring stars — 1st. By times of transits, marked with a chronometer. 2d. By differences of A. R., measured with the micrometer. 3d. By differences of declination, measured with the micrometer. In the reduction of the latter, the value of a revolution of the micrometer head used was — r = 9". 800 -f- 0".00026 (t° — 50°,) t being the temperature in degrees of Fahrenheit's scale. For the Right Ascension observations, those stars of sufficient brightness nearest to the decli- nation of the planet were commonly taken, preference being given to the stars of the catalogue in the circular of the Chile Expedition, when they were near enough to admit of frequent repe- tition. But in all cases the same comparison stars were used for the successive evening and morning observations. The stars compared in declination were taken from the catalogue of the Expedition. All the observations are reduced to the means for each wire separately, and the times by the chronometer are reduced to the sidereal times at the Observatory. The small corrections ap- plied to the means of the micrometer differences are for the effect of temperature upon the value of the screw. For the name of the observer, the initials W. C. B. for W. C. Bond, and G. P. B. for G. P. Bond, are employed. W. C. BOND. CAMBRIDGE OBSERVATORY, July 21, 1853. 53° EIGHT ASCENSIONS OF MARS: 1849-50. NOVEMBER 15, 1849. Mars following limb. Mars follows star a = 14 mag. Mars following limb. Mars follows star a = 14 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. s. s. s. It. m. s. m. s. 5. 5. 0 40 37.2 40 50.0 34.5 34.0 0 54 55.8 55 9.3 34.3 34.4 44 31.7 44 45.0 35.0 35.0 59 27.6 59 40.0 31.6 34.0 48 12.2 48 25.3 34.0 34.3 Remarks. Atmosphere very unfavorable. The star of comparison is in the same declination with Mars. Observer, W. C. B. h. m. 5. Mean by first wire . 0 49 32.90 Chronometer fast . . 3 10.74 Sid. time . . . . 0 46 22.16 No. of obs. 34.48 h. m. a. Mean by second wire . 0 49 45.92 Chronometer fast . . 310.74 Sid. time . 04635.18 A a. No. of s. obs. 34.34 Mars preceding limb. Mars follows star a — 14 mag. Mars preceding limb. Mars follows star a = 14 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. *. m. ». s. 5. h. m, 8, m. s. s. s. 0 42 21.4 42 34.5 34.1 35.3 0 53 1.8 53 14.7 33.1 33.9 46 20.4 46 33.5 33.1 33.7 56 46.3 56 59.6 33.0 31.1 50 9.9 50 23.4 33.6 33.4 h. m. B. Mean by first wire. . 0 49 43.96 Chronometer fast . . 3 10.74 Sid. time . 0 46 33.22 A a. 33.44 No. of obs. h. m. s. Mean by second wire . 0 49 57. 14 Chronometer fast . . 3 10.74 Sid. time . . . 0 46 46.40 No. of obs. 33.23 Mars following limb. Mars precedes star 6 = 8.9 mag. Mars following limb. Mars precedes star 4 = 8.9 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. i. m. •. >. s. A. m. s. m. s. s. 5. 0 40 37.2 40 50.0 21.8 22.5 0 54 55.8 55 9.3 22.7 32.4 -14 31.7 44 45.0 21.9 21.5 59 27.6 59 40.0 21.9 23.0 48 13.2 48 23.3 22.8 22.7 Remarks. The star is 5' north of Mars. A. m. t . Mean by first wire . 0 49 32.90 Chronometer fast . . 3 10.74 Sid. liuie , . . , 0 46 22.16 A a. No. of <• obs. 22.22 A. m. s. Mean by second wire . 0 49 45.92 Chronometer fast . . 3 10.74 Sid. time . . . . 0 46 35.16 No. of obs. 22.42 AT TIIK OBSERVATORY, CAMBRIDGE, MASS. NOVEMBER 15, IM 'I < ,.nl i 1111, .!. 419 Mars preceding liinli. Mars precedes star f> = 8.9 mag. Mars preceding limb. Mars precedes star ft — 8.9 mag. I'ir-t \\-Jrc. Second wire. First wire. Second wire. First wire. Second wire. First win-. Second wire. A. m. s. m. s. s. *. A. m. s. in. t. s. *. 0 42 21.4 42 31.5 23.6 23.0 0 53 1.8 53 14.7 23.7 24.3 46 20.4 46 33.5 23.6 23.5 53 46.3 53 59.6 24.3 23.7 50 9.9 50 23.4 23.7 23.9 h. m. s. Mean by first wire . . 049 7.96 Chronometer fast . . 3 10.74 Sid. time . . . . 0 45 57.22 A a. No. of s. obs. 23.76 A. m. s. Menu by second wire . 0 49 21 . 14 Chronometer fast . . 3 10.74 Sid. time . . . . 0 46 10.40 A a. No. of *. obs. 23.50 .Mars following limb. Mars follows star a =^ 13 mag. Mars following limb. Mars follows star a — 13 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. s. s. s. h. m. s. m. s. 8, 8. 1 I 6.7 4 19.6 31.2 34.1 I 13 3.9 13 19.7 34.3 34.6 9 57.3 10 13.0 31.1 34.3 14 18.2 14 34.1 34.2 31.3 11 40.9 11 57.0 34.1 31.5 15 29.4 15 45.1 33.9 34.1 Remarks. The observations are liable to errors from the imperfect illumination of the second-hand of the chronometer. Observer, G. P. B. A a. A a. No. of A. -m. s. s. obs. Mean l>y first wire . . Ill 26.07 Mean by second v Chronometer fast • 3 10.76 Chronometer fust 1 8 15.31 34.13 6 Sid. time . No. of obs. ' 3 10.76 1 8 30.66 34.33 NOVEMBER 15 and 16, Mars following limb. Mars follows star o = 13 mag. Mars following limb. Mars follows s ar a = 13 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h m. s. m. f. 9. s. A. m. s. m. ». s. X. B 56 42.0 56 56.5 24.2 a 24.5 9 1 25.5 1 40.0 24.3 34.5 53 22.0 58 36.5 23.8 24.0 2 45.0 2 59.4 24.0 24.1 9 0 21.5 0 35.7 24.3 34.2 A a. No. of A. m. «. s. obs. Mean by first wire . . 8 59 55.20 Chronometer fast . 50.65 Sid. time . . . . 8 59 4.55 24.10 5 A. m. i. Mean by second wire . 9 0 9.62 Chronometer fast . . 50.65 Sid. time . . . . 8 59 18.97 A a. 24.26 No. of obs. Mars following limb. Mars follows star b — 13 mag. Mars following limb. Mars follows star i = 13 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. 8. m. 8, s. 8. A. m. s. m. i. t. «. 9 6 10.8 6 23.7 24.0 24.1 9 10 51.3 11 3.8 23.8 23.8 7 56.3 8 9.3 23.8 34.3 11 47.5 12 0.5 23.9 24.0 8 58.0 9 10.5 24.0 23.5 12 53.0 13 5.5 23.8 23.9 Mean by first wire , Chronometer fast . Sid. time .... h. m. s. 9 9 46.15 S0.6S 9 8 55. W No. of olis. h. m. s. Mr;m liy r-fcuml wire . 9 9 58.87 Chronometer fast . . 50 (J."i Sid. lime 99 $.<& No. of obs. 23.9-2 420 OPPOSITION OF MARS, 1849-50, NOVEMBER 15 and 1(>, 1 S4O— Continued. Mars fallowing limb. Mars precedes st:ir II. C. 1-J554. Mars following limb. Mais precedes star H. C. 12554. First wire. Second win1. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m s. s. s. h. m. s. 7». S. s. s. 9 15 53.5 16 6.4 33.0 33 1 9 23 55.5 24 8.0 33.1 34.0 18 31.3 18 44.1 33.7 31.4 26 21.0 2fi 34.3 33.5 33.2 20 58.5 21 11.3 33.0 33.3 A. m. s. Mean by first wire . . 921 7.98 Chronometer fast . . 50.66 Sid. time . . . . 9 20 17.32 No. of obs. 33.26 k. m. s. Mean by second wire . 9 21 20.83 Chronometer fast . . 50 66 Sid. time. . 92030.16 No. of Ol>3. 33.62 Mars following limb. Mars precedes star H. C. 12554. Mars following limb. Mars precedes star H. C. 12554. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A m. *. m. s. s. s. A. m. s. fn. 5. s. s. 8 31 50.50 32 02.4 33.8 33.6 9 38 58.00 39 10.9 33.8 33.9 34 15.02 34 28.4 34.1 33.6 41 34.00 41 47.0 33.6 33.2 36 31.03 33 44.5 33.2 33.2 h. m. a. Mean by first wire . 9 36 37.70 Chronometer fast . . 50.66 Sid. time . . . . 9 35 47. OJ A a. 33.50 No. of obs. h. m. s. Mean by second wire . 9 36 50.64 Chronometer fast . . 50.66 Sid. time . . 9 35 59.98 A a. 33.50 No. of obs. Mars preceding limb. Mars precedes star H. C. 12554. Mars preceding limb. Mars precedes star 11. C. 12554. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. s. s. s. ft m. s. m. s. s. s. 9 17 2.4 17 13.6 35.1 34.4 9 25 4.4 25 17.5 35.0 3T..O 19 49.7 20 1.3 33.1 34.4 27 41.6 27 51.5 33.7 34.5 22 29.7 23 43.0 34.3 33.9 h. m. s. Mean by first wire . 9 22 25.58 Chronometer fast . . 50.66 Sid. time . 9 31 34.90 A a. No. of s. obs. 31.24 h. m. s. Mean by second wire . 9 22 38.38 Chronometer fast . . 50.66 Sid. time ... . 9 21 47.72 A a. No. of s. obs. 34.44 Mars preceding limb. Mars precedes star 11. C 12554. Mars preceding limb. Mars precedes star H. C. 12554. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. 3. m. g. s. s. A. m, s. m, s. s. s. 9 32 55.2 33 7.7 34.5 34.3 9 40 16.3 40 29.4 35.5 35.0 3521.0 35 33.9 35.0 34.6 42 58.0 43 10.6 35.0 35.6 37 49.8 38 2.5 34.2 34.7 A. m. s. Mean by first wire . 93752.06 Chronometer fast . . 50.66 Sid. time , ... 9 37 1.40 A a. No. of s. obs. 34.84 A. m. s. Mean by second wiie . 9 38 4.82 Chronometer fast . . 50.66 Sid. time 9 37 14.16 A a. No. of s. obs. 34.84 AT THE OBSERVATORY, CAMBRIDGE, MASS. NOVEMBER 16, 1849. 421 Mars fallowing liinli. Mars precedes n:ir 11. C. 12.V>I. Mars following limb. Mars precedes star II. C. 12554. Fii>t wire. Second wire. First wire. Sri/.Mid wire. First wire. Second wire. First wire. Second wire. h. in. s. 771. S. s. s. h. in. a. m. a. s. 8. 3 £8 59.9 59 14.5 53.9 53.6 3 9 29.0 9 43.1 54.1 51.1 3 3 43.:, 3 57.0 M.O 54.1 11 32.0 11 46.5 53.8 54.0 7 43.9 7 58.5 51.0 53.9 13 36.8 13 51.2 54.2 54.3 Remarks. Bad definition. Observer, G. P. B. o Recorded 34s. 2. li. in. s. Mean by first wire . 3 7 30.69 Chronometer last . . 50.66 Sid. time .... 3 6 40.03 A a. No, of s. obs. 54.00 h. m. s. Mean by second wire . 3 745.13 Chronometer fast . . 50.66 Sid. time 36 54.47 An. 54.00 No. of obs. NOVEMBER 1G and 17, 1849. Mars following limb. Mars precedes star II. C. 15554 = Mars following limb. Mara precedes star H. C. 12554 = 8 mag. 8 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. k, in. s. in. s. m. s. m. a. A. m. s. m. s. m. a. m. a. 9 37 25.3 37 39.7 1 3.7 1 3.6 9 48 3.8 48 18.0 1 3.7 1 4.0 39 4.4 39 18.8 3.7 3.6 10 17 5.0 17 19.5 4.5 4.5 41 50.7 42 5.2 3.8 3.8 18 44.8 18 59.2 4.7 4.8 42 34 4 42 49.0 3.6 3.6 20 23.0 20 37.5 4.6 4.6 41 19.1 44 33.4 3.6 3.8 22 22.9 22 37.4 4.6 4.6 46 8.1 46 22.7 3.9 38 Remarks. Definition good. Observer, O. P. B. h. m. s. Mean by first wire . 95611.05 Chronometer fast . . 50.95 Sid. time .... 9 55 20.10 An. m. «. 1 4.04 No of obs. h. m. f. Mean by second wire . 9 56 25.49 Chronometer fast . . 50.95 Sid. time . . . . 9 55 34.44 A a. No. of nt. a. obs. 1 4.05 Mars following limb. Mars follows star 12 mag. Mars following limb. Mars follows star 12 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. 10 11 14.4 11 46.6 12 39.2 «. 15.4 15.6 15.6 It. in. a. 10 13 43. 5 14 26.2 15 6.3 a. 15.4 15.4 15.5 .... Mean by first wire Chronometer fast . Sid. tune . . . 10 13 10.87 50.95 10 12 19.91 A a. 15.48 No. of obs. 422 OPPOSITION OP MAES, 1849-50, NOVEMBER 31, 1849. Mars following limb. Mar- follows llcssol 523. Mars following limb. Mars follows BesscI 523. 1 ' Second wire Fir-t wi 1 1 k. m. s. m. s. s. s. h. m. s. in. s. s. a. 1 52 12.0 M 86.5 28.3 28.5 1 57 14.1 57 28.6 28.3 28.5 53 20.0 53 34.4 28.6 28.6 58 85. 3 58 39.7 28.4 28.4 54 30.3 54 44.6 28.6 28.4 59 32.8 59 47.2 28.2 28.2 55 41.0 55 55.5 28.3 M.S 2 0 54.2 1 8.5 28.4 28.2 h m. s. Mean by first wire . 1 56 28.70 C'bronoincter fast . . 53.24 Sid. time . . . . 1 55 35.46 28.39 No. of A a. No. of obs. h. m. s. 1. obs. Mean by second wire , 1 56 43.12 Chronometer fiist . 53.24 g 1 55 49.88 28.41 R Observer, O. P. B. Mars following limb. Mars follows Bcssel 523. Mars following limb. Mars follows Befstl 523. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m, s. m. s. 5. 8. k. m. s. in. s. s. s. 2 7 27.9 7 43.5 27.7 28.2 2 29 28.8 29 41.3 27.0 27.6 8 43.6 8 58.1 27.8 28.1 30 44.3 30 59.0 27.1 27.2 10 37.0 10 51.0 28.1 28.0 32 7.5 3-2 22.0 27.0 27.1 11 47.1 12 1.4 27.6 27.6 33 57.2 34 11.5 27.2 27.1 13 0.3 13 14.4 28.0 28.0 35 33.1 35 47.7 27.1 27.3 14 15.8 14 29.9 27.8 27.8 36 49.0 37 3.3 27.1 28.3 15 37.0 15 51.3 27.8 27.9 37 58.6 38 13.1 27.2 27.1 16 57.9 17 12.0 27.9 27.6 39 10.6 39 25.0 26.7 27.0 18 43.0 18 57.3 27.4 27.8 40 24.6 40 39.0 26.7 26.8 19 59.2 20 13.4 27.7 27.4 41 35.0 41 49.4 27.0 27.2 21 11.3 21 25.3 27.6 27.3 Remarks. One of the wires at 24. 36m. was probably recorded Is. in error. Observer, W. C. B. A a. No. of /;. m. s. s. obs. ft. jn, s. Mean by first wire . 2 24 34.60 Mean by second wire . 2 24 48.95 Chronometer fast . 53.24 Chronometer fast . . 53.24 Sid. time . . . . 2 23 41.36 27.40 21 2 23 55.71 A a. 27.54 No. of obs. 21 NOVEMBER 21 and 83, 1S4O. Mars following limb. Mars follows star Bessel 523. Mars following limb. Mars follows Bessel 523. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. ft. m. s. 9 49 40.0 50 14 2 m. s. 5. 10.5 s. A. m, s. 9 56 33.5 m. s. 56 55.0 s. 10.5 s. 10.4 52 24.0 53 19.2 54 14.5 55 19.0 52 45.6 53 40.8 54 36. 2 55 40.7 10.7 10.7 10.7 10.4 10.6 10.6 10.6 10.5 57 43.5 58 34.3 59 31.8 10 0 39.9 58 5.2 58 55.9 59 53.5 1 1.6 10.5 10.3 10.3 10.4 10.6 10.4 10.3 10.3 h. m. a. Mean by first wire . 9 55 17.63 Chronometer fast . . 53,33 Sid. time .... 9 54 24.30 A a. 10. • No. of obs. Mean by second wire . 9 56 50.50 Chronometer fast . . 53.33 Sid, time 9 55 57.17 No. of obs. 10. 4S AT THE OBSERVATORY, CAMBRIDGE, MASS. NOVEMBER 21 and 22, 1849— Continued. 423 Mars following limb. Mar" follows Hr. Mean by first wire . 10 51 18.53 Chronometer fast . . 53.34 Sid. time . 105025.19 No. of obs. 8.41 A. m. s. Mean by second wire 10 52 36.22 Chronometer fast . . 53.38 Sid. time . . 10 51 42.84 An. No. of oba. NOVEMBER 20 and 2T, 1849. Mars following limli. Miirs follows star b — 11 mag. Mars following limb. Mars follows star 6 = 11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. 0. ». h. in. 1. t. 10 43 29.4 17.6 10 45 52.6 . . . 16.4 . . 43 19.0 18.5 46 35.4 • . . 17.4 . . 43 54.2 17.4 . , 47 15.5 • 17.3 . . 44 37.0 17.5 . , 47 50.9 . . . 17.4 . . 45 15.6 . . . 17.5 48 44.2 • • • 17.3 • • Remarks. Star is 5' north of Mars. Observer, G. P. B. h. m, s. Mean by first wire 1° 45 35. 38 Clmmnmett.'r Hist 06.53 Sid.tnne 10443883 A a. 17.42 No. of obs. 10 424 OPPOSITION OF MAES, 1849-50, NOVEMBER 20 and 37, 1849— Continued. Mars following limb. Maw precedes H. C. 12237. Mars following limb. Mars precedes H. C. 12237. First WIIT. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. in. ». in. s. s. s. A. m. s. m, s. $. a. 11 8 .18.8 8 53.5 37.1 37.0 11 M 23.5 14 38.0 37.1 37.4 10 49.5 11 4.0 36.9 37.2 15 49 7 16 4.2 37.4 37.4 12 10.7 12 25.3 37.1 37.2 A. m. s. Mean by first wire . . 11 12 22.34 Chronometer fast . . 53.56 Sid. time . . 11 11 25.78 No. of obs. 37.12 h. m. s. Mean by second wire . 11 1237.00 Chronometer fast . . 56.56 Sid. time 11 11 40.44 A a. fin. of s. obs. 37. S4 NOVEMBER. 37, 1849. Mars following limb. Mars precedes star 6=11 mag. Mars following limb. Mars precedes star 6=11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. i. . s. h. m. s. 5. 1 8 24.8 . . . 22.9 1 11 36.6 23.1 9 16.0 22.8 , . 12 2.5.0 • . i 22.8 10 7.5 . . . 32.8 . . 13 31.3 22.2 10 50.3 • • • 23.2 • • 15 27.0 . . . 23.5 • • Remarks. Observations through passing clouds. Observer, G. P. B. A. m. s. Mean by first wire in 27,31 Chronometer fast 56.75 s'd- time i 10 30.55 22.94 No. of obs. Mars following limb. Mars precedes star 6 = 11 mag. Mars following limb. Mars precedes star 6=11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. «. 1 23 59.8 . . . 23.4 t ( 1 26 43.3 23 7 25 7.5 . . . 23.6 27 32.5 23 8 ' 2555.0 24.0 28 20.0 34.0 Mean by first wire . . A. m, s. A a. 8, No. of ob*. Chronometer fast . , . Sid. time .... 6 Mara following limb. Mars precedes star 6=11 mag. Mars following limb. Mars precedes star 6 — 11 mag. First win:. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second \virc. A. m. s. 1 46 23.5 — • • • s, 25.0 — — ^ — ^— ^_ A. 7/1. S. 1 47 15.0 • . . . s. 25.0 v . . AT THE OBSERVATORY, CAMBRIDGE. MASS. 425 XDVKMIIKll lit, 1840— Continued. A £Z. h. m. s. s. Mran hv first niru 14649.25 ChronmiM-t'T last 56. 7(i Kid. time 1 45 4-2.49 25.00 No ,,f obs. Mars following limb. Mars precedes star i = 11 mag. Mars following limb. Mars precedes Mar h -- 11 mag. Firet wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. s. s. t. k. m. s. m. s. s. s. I 50 17.1 50 30.2 24.9 24.8 1 55 31.2 55 44.3 25.0 1 25.0 51 18.1 51 31.2 21.9 21.0 56 35.0 56 48.0 25.3 25.3 52 23.5 52 30. 5 23.2 25.1 57 38.8 57 51.9 25.3 25. J 53 20.9 53 33.8 24.9 25.2 54 21.8 54 35.0 25.2 25.0 Mean hy first wire Chronometer fust . Sid. lime . . . ft. m. s. 1 53 55.80 56.76 1 52 59.01 No. of obs. 25.09 It. m. s. Mean hy second wire . 1 54 8.86 Chronometer fast . . 56.76 Sid. time . . 1 53 12.10 A a. 25.05 No. of obs. Mars following limb. Mars precedes star i = 11 mag. Mars following limb. Mars precedes star 6 = 11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. in. s. m. s. s. s. h. m. s. m. s. s. s. 2 9 50.8 10 3.3 25.5 25.9 2 35 49.0 26 2.0 27.2 26.9 10 59.4 11 12.3 26.0 26." 37 5.6 37 18.4 27.0 27.6 12 7.3 12 20.3 26.0 26.3 38 18 3 38 31.9 27.7 27.1 14 8.0 14 21.2 26.1 26.1 39 34.0 39 47.0 26.3 27.3 15 56.5 1C 9.4 26 1 26.6 40 52.0 41 5.0 27.3 27.3 17 4.6 17 17.7 26.1 26.3 4-2 2.0 42 15.0 27.5 27.5 18 27.2 18 40.5 28.4 25.8 43 15.0 43 27.9 27.7 27.6 19 42.2 19 55.0 26.1 26 4 44 29.0 44 42.1 28.0 27.6 20 53.0 21 5.0 26.4 26.6 45 41.8 45 54.9 27.5 27.3 22 2.2 22 15.3 26.4 26.9 47 12.1 47 24.7 27.9 28.3 23 12.4 23 25.3 26.6 26.9 48 27.3 48 40.5 27.9 27.7 24 56.8 25 9.4 26.5 27.0 49 40.3 49 53.3 27.9 27.9 26 6.0 26 19.0 26.2 26.6 50 53.8 51 6.8 27.9 28.0 5-2 22.8 52 36.7 29.0 27.9 h. m. a. Mean hy first wire . 2 31 31.42 A a. No. of s. olis. h. m. s, Mean liy second wire . 2 31 44. 52 Chronometer fa.«t . . 56.76 Chronometer fast . . 56.76 Sid. time .... 2 30 31.66 26.93 27 Si<]. time 2 30 47.76 Observer, YV. C. B. An. 27.02 No. of obs. 27 NOVEMBBR. 27 and »8, Mars following limb. M^rs precedes star * = 11 mag. Mnrs following litnb. Mars precedes star 4=11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. ». s. ». h, m. s. m. s. s. s. 10 13 38.3 13 53 5 51.3 51.3 10 32 8.5 32 23.6 52.5 52.4 15 17.4 15 32.5 51.3 51.4 33 40.6 34 55.7 52.3 52.3 17 55.3 18 10.4 51.4 51.6 35 9.4 35 24.5 52.2 52.2 18 29.5 18 44.5 51.5 51.5 38 28.3 38 43.5 53.7 52.7 20 6.3 20 21.4 51.6 51.6 40 14.5 40 29.7 52.7 52.6 21 40.5 21 55.7 51.9 51.8 41 52.2 42 7.4 52.8 M.9 23 13.5 23 28.8 5-2.0 51.7 43 29.3 43 44.5 52.7 52.8 ^ 24 54.8 25 10.0 51.8 51.8 45 49.9 46 5.0 53.0 53.1 26 34.8 26 50.0 52.0 52.0 47 27.1 47 4-2.0 52.7 0.1 28 V,.f, 29 1.8 52.3 52.3 49 11.0 49 2C.3 53.3 03.2 30 36.0 30 51.2 52.3 52.3 51 34.0 51 49.3 53.5 53.4 53 16.4 53 31.6 53.4 53. :i 426 OPPOSITION OF MARS, 1849-50, XOVEMBEIl 27 niul 28, 1849— Continued. A. m. s. Mean by tirsl wire . . 10 33 45.12 Chronometer fn*-t . . 56.98 Sid. time 10 31 48.14 A a. s. No. of obs. h. m. s. Mean by second wire . 10 33 3 60 Chronometer fast . . 56.98 Sid. lime . . . . 10 33 6.62 A a. No. of s. obs. 52.32 23 Mars following Hmh. Mars precedes star 1 = 11 mag. Mars following limb. Mars precedes star b — 11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second win:. A. m. i. 10 59 18.2 11 2 27.1 m. s. 59 33.7 2 42.0 s. 53.8 53.9 s. 53.3 54.2 h. m. s. 11 4 24.4 . . . s. 53.9 • • Remarks. Interrupted l>y clouds. Observer, W. C. B. h. m. s. Mean by first wire . .11 2 3.23 Chronometer fast . . 57.00 Sid. time. . 11 1 6.23 A a. 53.87 No. of h. m. s. Mean by second wire . 11 1 7.85 Chronometer fast . . 57.00 Sd.time . . 11 0 10.85 No. of nils. 1VOVEMBEB. 30, 1849. Mars following limb. Mars follows Bcssel 405. Mars following limb. Mars follows Besscl 405. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. s. h. m. s. s. 0 47 17.2 . . . 13.4 . . 0 52 33.8 13.2 , . 48 15.4 . . . 13.4 . • 53 13.5 * . . 13.1 _ t 49 5.5 . . . 13.3 . . 53 46.0 . . . 13.0 f , 49 40.0 13.2 . . 54 56.0 . • i 13.0 50 19.5 . . . 13.2 . . . 55 30.0 . . 13.0 i t 50 51.9 . . . 13.3 . . 56 8.4 . . . 12.9 . . 51 28.1 . . . 13.3 56 47.8 ... 13.0 52 1.3 . . . 13.3 t f 1 Mean by first wire Chronometer fast . Sid. time . . . . A. -m. s. . . . . 0 52 7.63 .... 57.16 . . . . 0 51 10.47 Observer, G. P. B. A a. 13.17 No. of obs. 15 DECEMBER 5, 1819. Mars following limb. Mara follows star b = 14 mag. Mars following limb. Mars follows star 4 = 14 mag. First wire. fccond wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. 9. m. s. m. «. m. 5. A. m. s. m. x. m. ». m. t. 0 57 29.0 57 45.5 16.0 1 17.0 1 20 14.9 20 31.5 1 14.7 1 15.5 59 46.9 0 3.0 16.8 1 16.8 2J 32.4 23 48.5 1 15.0 1 15.0 1 2 0.0 2 6.0 16.3 1 16.5 24 45.2 25 1.1 1 15.1 1 14.7 4 20.0 36.4 15.9 1 16.5 27 19.0 27 35.0 1 14.5 1 14.6 6 28.0 6 44.2 15.8 1 16.2 29 23.0 S9 39.3 1 14.1 1 14.3 8 43.0 8 59.0 16.2 1 16.2 31 18.3 81 34.5 1 14.1 1 14.5 10 48.9 11 5.0 16.0 1 16.1 33 51.8 34 8.0 1 14.6 1 14.6 13 13.8 13 29.9 15.8 1 15.9 38 8.8 36 24.7 1 14.1 1 14.2 15 18.3 15 34.4 15.3 1 15.7 38 15.9 38 31.8 1 13.8 1 14.0 17 25.8 17 41.8 14.9 1 15.6 40 25.0 40 41.0 1 14.0 1 14.0 AT THE OBSERVATORY, CAMBRIDGE, MASS. DECEMBER 5, 1849— Continued. Remarks. Tin' star of comparison is double, and is 1' north of Mars. Observer, W. C. B. 427 A. in. «. ran hy Bret wire . 1 18 59.40 Chronometer fast . 57.00 Sid. tiuiu .... 1 18 3.40 A a. m. s. 1 15.15 No. of obs. 20 h. m. t. Mean hy second wire 1 19 15.53 Chronometer fast . 57.00 Sid. time . . 1 18 18.53 A a. No. of m. i. oba. 1 15.39 Mars following limb. Mars follows star ''11 mag. Mars following limb. Mars follows star b = 14 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. s. s. *. A. m. s. m. f. s. «. I 56 46.5 57 2.5 13.2 13.0 i 3 19.0 3 34.9 12.3 12.2 58 54.9 59 10.8 12.1 12.7 6 19.8 6 35.9 11.9 12.1 2 1 9.8 1 25.7 12.6 12.7 8 35.3 8 51.2 12.0 13.0 A. m. s. Mean hy first wire . 2 230.68 Chronometer fast . 57.00 Sid. time .... 2 1 33.88 12.35 No. of obs. A. m. 8. Mean by second wire 2 2 46.83 Chronometer fast . 57.00 Sid. limn .... 2 1 49.83 A o. 12.45 No. of obs. DECEMBER 6, 1849. Mars following limb. Mars follows star x = 10 mag. Mars following limb. Mars follows star x= 10 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. c. s. $. h. m. s. m. s. t. 9, 1 56 44.5 57 0.5 37.7 37.7 2 18 31.7 18 47.8 36.8 36.0 58 15.4 58 31.5 37.1 37.3 19 59.0 20 15.0 35.8 35.8 2 3 11.3 2 27.3 37.0 36.9 31 19.9 21 35.8 35.7 35.8 3 52.2 4 8.0 37.2 37.2 23 20.8 23 36.8 35.5 35.6 5 18.0 5 34.0 37.1 36.7 24 44.0 25 0.0 35.6 35.7 7 3.0 7 19.0 36.9 37.0 26 7.5 26 23.4 35.5 35.4 8 28.9 8 45.0 36.7 36.7 27 33.1 27 49.0 35.1 35.1 9 55.0 10 11.0 36.5 36.5 29 3.0 29 18.9 35.5 35.3 11 29.0 11 45.0 36.3 36.5 30 26.6 30 42.5 35.3 34.9 12 57.1 13 13.0 36.6 36. 3 31 51.7 32 7.6 35.3 35.1 14 53.8 15 9.3 36.7 36.3 33 19.0 33 34.8 35.0 34.8 16 27.2 16 43.2 36.0 36.2 34 46.0 35 1.9 35.0 34.9 Remarks. A bright star follows x by 9s., and is 8" south of it. Observer, W. C. B. Mean by first wire Chronometer fast Sid. lime . . . h. m. 8. 2 17 1.57 57.47 3 16 4.10 An. 6.16 No. of obs. 24 h. m. s. Mean by second wire 2 17 17.51 Chronometer fast . 57.47 Sid. time . . . , 2. 16 20.04 A a. 36.07 No. of oba. 24 428 OPPOSITION OF MARS, 1849-50, DECEMBER 6, 1849— Continued. Mars following limb. Mars follows star b = 14 mag (?) Mars following limb. Mars follows star i — 14 mag.(r) First wire. Second wire. First wire. Second wire. First wire Second wire. First wire. Second wire. h. m. s. m. s. s. s. fi. m. s. in. s. s. s. 2 49 9.2 49 85.0 ai.3 24.7 2 56 41.7 55 57.7 24.5 24.1 50 1.7 50 17 5 24.7 21.5 58 44.0 59 0.0 23.8 24.0 52 53.0 53 9.0 23.9 24.0 3 1 17.8 1 33.8 23.6 24. 1 54 57.3 55 13.2 24.1 24.0 Remarks. The star is the same as that used on the 5th. Observer, W. C. B. A. m. $. Mean by first wire . 3 54 49.24 Chronometer fast . . 57.48 Sid. time .... 25351.76 A a. No. of s. obs. 24.13 ft. m. f. Mean by second wire . 2 55 5.17 Chronometer fast . . 57.48 Sid. time . . . . 2 54 7.69 A a. No. of £. obs. 24.20 Mars following limb. Mars precedes star i = 14 mag. Mars following limb. Mars precedes star 6 = 14 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. «. m. s. s. 5. A. m. s. in. s. 5. s. • . . 49 25.0 26.3 2 56 41.7 56 57.7 25.7 25.8 . . . 50 17.5 . . 25.5 58 44.0 59 0.0 25.8 25.6 2 52 53.0 53 9.0 25.8 25.8 3 1 17.8 1 33.8 26.5 26.4 54 57.3 55 13.2 25.5 26.5 n. m. s. Mean by first wire . 2 56 54.7fi Chronometer fast . . 57.48 Sid. time . . . . 2 55 57.28 Aa. 25.86 No. of obs. h m. s. Mean by second wire . 255 5.17 Chronometer fast . . 57.48 Sid. time . . . . 2 54 7.69 A a. No. of J. obs. 25.99 DECEMBER 6 and 7, ISl'.l. Mars following limb. Mars precedes star ft — 14 mag. Mars following limb. Mars precedes star b — 14 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h, m, s. m. s. s. 8. h. m. s. m. s. s. s. 10 44 8.0 44 24.0 58.9 58.8 10' 49 41.9 49 S7.7 58.9 59.0 46 9.2 46 25.3 59.0 58.8 51 30.2 51 46.3 59.0 59.0 47 54.0 48 11.3 59.3 59.0 53 21.0 53 37.0 59.2 59.3 Remarks. The swr of comparison is the same as that used on the 5th, and called ^, Observer, \V. C. B. h. m. s. Mean by first wire . 10 48 47.33 Chronometer fast . . 57.58 Sid. time . . . . 10 47 49.80 A a. No. of ». obs. 59.05 A. in. s. Mean by second Wire , 10 49 3.60 Chronometer fast . , 57.58 Sid. time 10 48 6.03 A a. No. of i. obs. 68.98 AT THE OBSERVATORY, CAMBRIDGE, MASS. DECEMBER O inn) 7, 1849. 429 Mars following limli. Mars precedes star a-— 10 mag. Mars following limb. Mars precedes star x == 10 mag. First wire. Second wire;. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. in. s. m. t. s. 5. A. m. s. m. 5. s. s. 11 7 17.0 2.1 11 23 40 0 23 56.0 2.0 2.10 7 57.0 . . . 1.5 24 29.0 24 45.0 2.05 2.05 9 3.3 . . . 1.3 . 25 21.0 25 37.0 2.2 2.15 9 51.0 1.4 . 27 4.0 27 20.0 2.4 2.45 10 21.0 . . . 1.5 28 19.0 28 35.0 2.5 2.55 13 9.5 1225.5 1.5 1.5 29 41.0 29 57.0 2.5 2.55 13 11.0 13 17.0 1.35 1.5 30 34.0 30 50.0 2.65 2.55 13 51.0 14 7.0 1.6 1.55 31 22.0 31 38.0 2.7 2.65 14 42.0 14 58.0 1.5 1.5 32 41.0 32 57.0 2.65 2.65 15 29.0 15 45.0 1.55 1.55 33 52.0 34 8.0 2.6 2.85 16 19.0 16 35.0 1.55 1.5 34 40.0 34 56.0 2.9 3.00 17 46.0 18 2.0 1.65 1.6 35 22.0 35 38.0 3.05 2.05 18 39.0 18 55.0 1.6 1.6 36 24.0 36 40.0 3.05 2.15 20 39.0 20 55.0 1.55 1.6 37 6.0 37 22.0 3.15 2.10 21 22.0 21 38.0 1.75 1.7 37 48.0 38 4.0 3.15 2.25 22 11.0 22 27.0 1.9 1.9 39 4.0 39 20.0 3.2 2.10 22 56.0 23 12.0 2.0 2.05 39 53.0 40 9.0 3.1 2.15 Remarks. Star is 3' north of Mars, and was called x = 10 mag, December 6, P. M. Observer, W. C. B. ft. m. s, Mean by first wire . 112333.93 Chronometer last . 57.58 Sid. time .... 11 22 36.35 A a. 2.15 No. of Oil-. 34 A. m. s. Mean by second wire 11 26 20.98 Chronometer fast . 57.58 Sid. time . . . 11 25 23.40 A a. 2.27 No. of oln. 29 DECEMBER 7, 1849. Mars following limb. Mars follows star ~ 11 mag. Mars following limb. Mars follows ttar = 11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. *. 0 38 23.8 m. *. 38 40. n >. 36.5 J. 36.2 A. m. a, 0 55 35.1 m. 5. 55 51.2 t. 35.3 s. 35.3 40 0.5 40 16.7 36.0 36.1 57 16.8 57 32.7 35.2 35.2 41 26.0 41 42.0 36.7 36.6 58 39.1 58 55.3 35.1 35.3 42 51.5 43 7.5 36.5 36.1 1 0 5.5 0 21.4 35.2 35.0 44 17. 2 44 33.3 36.2 35.9 327.0 3 43.0 34.1 34.3 45 57.7 46 13.6 36.3 36.1 4 48.9 5 5.0 34.4 35.0 47 26.4 47 43.0 35.1 36.0 6 9.9 6 26.0 34.4 34.4 48 55.0 49 11.0 35.7 35.8 7 28.6 7 44.7 34.5 34.7 50 19.3 50 35.4 35.5 35.7 8 55.9 9 12.0 34.4 34.5 51 47.9 52 3.8 35.9 35.8 10 16.0 10 31.9 34.0 34.0 Remarks. The star is 2' north of Mars. Observer, W. C. B. A a. No. of A. m. s. *. obs. Mean by first wire . 0 54 12.45 Mean 1 Chronometer fast 57.75 Chronc Sid. time . . . . 05314.70 3S.37 20 Sid. tin A. m. i. Mean by second wire 0 54 28.47 • fast . 57.75 . 0 53 30.72 An. 35.40 No. of ob». 20 430 OPPOSITION OF MARS, 1849-50, DECEMBER 7, 1849-Coiltlnnccl. M.i!- following limit. Mars precedes star =11 mag. Mars following limb. Mars precedes star = 11 mag. First wire. Second wire. First wire. Second wire. s. First wire. Second wire. First wire. Second wire. h. m. s. m. g. «. ft, m. s. m. 8, 3. a. 1 36 42.0 36 58.0 32.7 32.5 1 48 11. I 4827.1 31.6 31.7 37 57.5 38 13.6 32.2 32.3 49 25.9 •49 42.0 31.6 31.6 39 11.5 40 30.5 41 38.0 42 46.8 39 27.4 40 46.2 41 54.0 43 2.7 32.3 3S.O 32.0 31.4 32.3 32.3 31.9 32.1 50 45.5 51 58.5 53 11.0 54 17.2 51 1.6 52 14.5 53 27.0 54 33.2 31.4 31.6 31.5 31.3 31.4 31.5 31.5 31.2 44 46.8 45 2.8 31.7 31.9 55 31.0 55 47.0 31.2 31.0 45 58.3 46 14.4 31.7 31.6 56 45.6 57 1.7 31.2 31.1 47 4.0 47 20.1 31.8 31.7 58 3.0 58 19.0 30.8 30.8 Remarks. Cold and windy ; images unsteady. The star of comparison is nortl) of a red star ; difference of right ascension = 2.6s. It also precedes another star of the lltll mag. by 24.5s. ; difference of declination = 4'. It clouded before the morning observations. Observer, G. P. B. A a. No. of h. m. «. s. obs. h. m. s. Mean by first wire . . 1 47 29.12 Mean by second wire . 1 47 55.13 Chronometer fast . 57.75 Chronometer fast . 57.75 Sid. time . . . . 1 46 31.37 31.66 18 Sid. time . . . . 1 46 47.38 A a. 31.64 No. of obs. 18 DECEMBER 8, 1849. Mars following limb. Mars precedes star — 11 mag. Mars following limb. Mars precedes star = 11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. 9. m. a. m. t. m. 8, ft. m. 8. m. s. m. t. m. s. 3 19 13.0 19 27.9 I 8.8 9.1 2 29 57.6 30 13.5 1 9.9 1 9.5 21 11.7 21 27.6 1 8.9 9.2 31 59.8 32 15.4 1 9.6 1 9.9 23 7.9 23 24.0 1 9.1 9.0 34 23.3 34 39.3 1 10.2 1 10.2 25 2.8 25 19.2 1 9.2 9.5 36 32.2 36 48.3 1 10.3 1 10.3 27 59.2 28 15.0 1 9.3 9.5 39 36.5 39 52.5 1 10.6 1 10.5 Remarks. Star of comparison is the same as that used on the 7th. Observer, W. C. B. A a. No. of Mean by first wire . Chronometer fast . Sid. time . . . . 2 28 54.30 57.97 . 2 27 56.03 1 9.59 10 Mean b Chronoi Sid. tin h. m. s. Mean by second wire . 2 29 10.27 fast . . 57.97 . . . 3 38 12.30 No. of OUB. 1 9.67 Mars following limb. Mars follows star = 11 mag. Mars following limb. Mars follows star = 11 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. 8, m. s. s. t. h. m. s. m. a. 2 49 50.5 50 6.5 41.4 41.4 2 53 46.1 54 2.0 41.0 41.0 51 10.9 51 26.8 41.1 41.1 55 3.0 55 19.0 40.9 40.8 52 27.7 52 43.6 41.2 41.1 56 37.2 56 53.0 40.9 40.4 Mean by first wire . Chronometer fast . Sid. time A. tn. i. 2 53 9.23 57.97 3 52 11.35 A a. s. 41.08 No. of obs. h. m, s, Mean by second wire . 35325.15 Chronometer fast . . 57.97 Sid. time . . . . 2 53 27. 18 No. of obs. 40.97 AT THE OBSERVATORY, CAMBRIDGE, MASS. DECEMBER 11, IM'I, 431 Mais following limb. Mars follows star — 10 mng. Mnrs following limb. Mara follows star = 10 mag. First wirr. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. ft. in. s. m. a. s. s. ft. m. g. m. s. *. s. S3 58 52. t 59 8.1 35.2 35.1 0 19 28.1 19 44.0 33.3 33.2 0 0 33.3 0 49.1 35.3 35.1 20 59.6 21 15.7 33.6 33.5 2 15.8 2 33.0 34.8 35.0 2S 20.8 22 37.0 33.6 33.2 3 31.2 3 50.3 34.7 34.9 23 40.5 23 56.7 33.5 33.9 4 55.0 5 11.4 34.3 34.6 25 7.9 25 24.0 33.3 33.2 6 34.6 6 50.8 34.6 34.5 26 29.6 26 45.5 3-2.7 32.9 7 53.0 8 9.0 34.5 34.5 28 58.7 29 14.0 33.1 39.5 9 14.9 9 30.8 34.4 34.4 30 18.2 30 34.3 32.4 33.7 10 33.1 10 49.2 34.1 34.2 31 37.8 31 54.0 3-2.8 33.0 12 29.9 12 45.8 34.1 34.0 33 8.0 33 24.0 32.7 33.0 13 54.0 14 10.0 34.1 34.0 34 29.6 31 45.7 32.3 32.4 15 20.7 15 3G.8 33.7 33.8 35 54.0 36 9.8 32.9 32.3 Remarks. High wind. Telescope disturbed. Observer, W. C. B. Mean by first wire Chronometer fast . Mil. time . . A. m. i. 0 17 26.81 57.70 16 29.11 No. of ohs. 33.76 It. HI. s. Mean by second wire . 0 17 42.83 Chronometer fast . . 57.70 Sid. time . 1645.13 33.79 No. of obs. 24 Mars following limb. Mars follows star a = 10 mag. Mars following limb. Mars follows star a = 10 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second win . ft. m. s. in. f. s. s. A. m. s. m. ». s. «. 1 8 19.2 8 35.2 30.2 30.1 1 20 2.8 20 18.8 29.2* 29.3 9 40.4 956.4 29.7 29.9 21 18.6 21 34.8 29.1 29.2 10 53 0 11 9.1 30.0 30 1 22 36.9 22 52.8 29.1 29.0 11 57.9 12 14.0 29.8 29.7 23 59.5 24 14.4 29.0 27.8 13 20.0 13 36.9 29.5 29 7 25 15.8 25 31.8 28.8 28.8 14 39.8 14 55.6 29.8 29.7 26 28.0 26 44.3 28.5 28.8 15 49.9 IB 6.0 29.2 29.5 27 49.5 38 5.3 29.0 28.8 17 1.5 17 17.5 29.2 29.4 29 9.0 29 25.0 28.5 28.1 18 11.8 18 27.8 29.4 29.5 30 25.8 30 41.9 28 3 28.4 Remarks. Cold, windy, and very bad vision. Observer, G. P. B. Mr.in by first wise Chronometer fast Si. I. time . . . h. m. s. . I 19 16.63 57.68 . 1 18 18.95 An. 29.25 No. of obs. 18 h. m. s. Mean by second wire . 1 19 32.65 Chronomcier fast . . 57.68 Sid. time . . 1 18 34.97 A a. 29.21 No. of obs. M:u~ following limb. Mars precedes star o = 10 mag. Mars following limb. Mars precedes star a ~ 10 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. t. m. ». s. s. h. m. s. m. 5. s. s. 1 34 11.0 34 27.0 27.9 28.0 1 38 9.9 38 25.8 27.7 27.6 35 23.8 35 40 0 28.0 27.8 39 21.5 39 37.6 27.6 28.0 36 52.1 37 8.0 27.9 28.0 40 52.0 41 8.0 27.8 27.5 Mean by first wire Chronmm-ter fast Sid. time . . . fi. m. s. . 1 37 28.4-2 57.68 . 1 36 30.74 No. of obs. 27.83 A. m. s. Mean by second wire . 1 37 44.40 ChroMomcler fast . . 57.68 Sid. time 1 36 46.72 A a. No. of *. obs. 27.82 432 OPPOSITION OF MARS, 1849—50, DECEMBER 11 nlld 1%, 1849. Mars followinfi limb. Mars precedes star a — 10 nng. Mars following liiiib. Mars precedes star a = 10 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. 10 46 51.8 in. s. 47 3.1 .... s. 13.7 A. m. s. 10 48 25.0 ttl. S. 48 36.8 .... s. 13.3 A. m. s. Moan by sccoirr" wire 10 47 49.95 Cbronometer fas 57.09 Sid. time 104652.86 An. 13.50 No. of Mars following limb. Mars precedes star o = 10 mag. jVlars following limb. Mars precedes star o = 10 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. s. t s. ft. m. s. m. s. s. s. 10 51 43.2 52 6.8 13.4 13.4 li 5 26.8 5 51.0 15.2 14.3 53 12.3 53 36.3 13.7 13.8 6 50.1 7 13.9 14.3 14.6 54 18.2 54 42.0 13.8 14.2 8 7.8 8 31.6 14.4 14.9 55 40.7 56 4.2 13.3 13.8 10 41.7 11 5.5 14.6 14.8 56 56.8 14.2 . . 11 50.3 12 14.6 14.7 14.6 57 43.6 58 7.5 14.1 13.7 13 4.3 13 28.0 14.7 14.3 11 1 11.8 1 36.0 14.2 14.3 14 4.3 14 28.6 14.9 15.4 « 56.0 3 20.0 14.3 14.5 15 39.2 15.0 . 4 8.1 4 33.3 14.2 14.4 16 39.2 17 2.7 15.8 15.3 18 6.3 18 29.0 14.2 15.5 h. m. s. Mean by first wire . 11 5 10.58 Chronometer fast . 57.08 Sid. time .... 11 4 13.50 No. of obs. 14.89 h. m. s, Mean by second wire 11 5 26.47 Chronometer fast . 57.08 Sid. time . . 11 4 29.39 No. of obs. 14.46 Observer, W. C. B. Mars following limb. Mare precedes star a x= 10 mag. Mars following limb. Mars precedes star a = 10 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. Fir*t wire. Second wire. A. m. s, 11 23 47.2 24 47.1 . . . 9j 15.8 15.9 • • h. m. s. 11 26 16. 8 27 46.8 m. s. 27 4.7 28 37.0 s. 15.9 15.3 s. 15.3 16.0 A. m. t, Mean by first wire . 11 25 39.48 Chronometer fast . 57.70 Sid. time . . . . 11 24 41.78 No. of obs. 15.72 A. m. s. Mean by second wire 11 27 50.85 Chronometer fast . 57.70 Sid. time . . . . 11 26 53.15 No. of obs. Observer, W. C. B. Mars following limb. Mars precedes star a = 10 mag. Mars following limb. Mars precedes star a — 10 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. k. m. c. t. h. m. s. 11 31 14.4 . . . 16.6 . 11 34 21.3 16.4 31 57.0 . . . 16.4 35 4.9 16.2 32 32.0 • . , 16.5 35 49.9 16 1 33 48.8 • • • 16.7 36 19.3 16.6 AT THE OBSERVATORY, CAMBRIDGE, MASS. 433 DECEMBER 11 and 13, 1849— Continued. R marks. The slat i.i tlic same as that used la?t night. Wind very higli, and the observations bad. Observer, O P. B. A a. fi. m. i. i. Mean by first wire 113354.42 Chronometer fast 57.08 Sid. tinie 113257.34 16.44 No. of obi. DECEMBER 12, 1849. Mars following limb. Mars follows ttar = 13 mag. Mars following limb. Mars follows Mar = 13 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. 5. s. s. A. IN. 5. m. 8. s. s. 0 50 19.0 50 35.0 51.2 51.0 1 3 13.5 3 29.5 50.4 50.5 53 28.0 53 41.9 51.0 50.9 4 42.5 4 58.4 50.0 49.9 54 57.7 55 13.8 50.0 50.8 6 25.3 6 41.4 49.8 49.9 58 28.4 56 44.5 50.5 51.0 7 53.1 8 9.1 50.0 49.9 57 57.5 58 13.5 50.6 50.5 9 37.3 *9 53.4 49.8 , 49.8 59 26.2 59 42.3 50.6 50.5 10 6.8 10 22.8 49.7 49.6 1 1 2.0 1 18.0 50.4 50.4 Remarks. The star is too faint to be well observed, being occasionally hidden by cirrus clouds. At 2A. the star was 3" south of Mars' north limb. Observer, G. P. B. A. m s. A a. s. No. of obs. A. m. s. An. t. No. of obs. first wire . . 1 1 11.95 Mean by second wire . 1 1 27.97 ieter fast . , 1 0 56.83 15.12 50.31 13 Chronometer fast . . 1 0 56.83 31.14 50.32 13 Mars following limb. Mars follows star — 13 mag. Mars following limb. Mara follows star = 13 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. x. nt. St «. 8. A. m. s. m. «. «. s. 1 12 50.3 13 6 4 49.6 49.6 1 23 12.4 2328.4 48.9 48.9 20 15.0 20 31.1 49.0 49.1 25 49.8 26 5.9 48 4 48.5 21 43.9 21 59.9 48.9 48.9 A a. No. of h. m. s. t. obs. Mean by first wire . . 1 20 46 28 Mean by second wire . Chronometer fast . 56.83 Chronometer tut . . 1 19 49.45 48.96 5 h. HI. s, 1 21 2.84 56 83 An. 49.00 No. of obs. Mars following limb. Mars follows star — 13 mag. Mars following limb. Mars follows star = 13 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. ». m. f. t. 5. A. m s. m. s. K. i. 1 33 14.6 33 30.5 48.1 48.0 1 43 33.3 43 49.3 47.3 47.4 34 44.0 35 0.0 48.0 48.0 45 42.5 45 58.5 47,1 47.0 36 14.3 36 30.3 47.8 47.8 47 13.0 47 29.3 47.0 47.3 38 38.3 38 54.3 47.8 47.7 48 44.4 49 0.4 46.9 46.9 40 21.9 40 37.3 48.1 47.3 50 22.3 50 38.2 46.8 46.7 41 59.4 42 15.2 47.5 47.9 52 25.6 52 41.7 46.6 46.7 h. m. s. Mean by first wire . . 14246.13 Ohionometer fast . . 56.82 Sid. time 1 41 49.31 55° An. 47.42 No. of obs. 12 A. T?l. S. Mean by second wire . 1 43 2.08 Chronometer fast . . 56.82 Sid. lime 1 42 5.26 47.35 No. of 12 434 OPPOSITION OF MARS, 1849-50, DECEMBER IT, 1849. Mars following limb. Mars follows star = 8 mug. M irs following limb. Mars follows star = 8 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. s. m. s. m. s. h m. s. m. s. m. *. m. s. 83 5S 7.4 56 23.3 1 7.9 1 8.7 0 33 48.0 34 3.3 1 6.5 1 6.3 23 58 10.3 58 26.0 7.8 7.8 37 16.2 117 31.4 5.4 5.4 0 0 44.9 1 0.3 7.8 8.3 41 50.0 42 5.2 52 5.2 2 53.5 3 8.4 8.3 8.3 43 43.7 43 58.4 5 5 4 8 10 14.4 10 S9.5 7.3 7.0 45 39.0 45 54.2 5.0 4.8 22 23 0 23 38.7 6 5 6.4 48 7.0 48 82.0 5.0 4.5 23 6.2 2621.5 5.8 5.9 50 5.3 50 20.4 4.6 4.6 27 59.3 28 14.6 6 0 6.0 52 25.3 53 40.8 4.6 3.8 29 56.6 30 11.7 6.0 6.2 55 14.2 55 29.5 4.3 4.1 31 47. 2 33 2.2 5.7 5.6 1 Remarks, The star is 2' or 3' north of Mars. There is a brighter star 5' south of Mars, and 15s. preceding it. A a. No. of Am.*. A m. s. obs. Mean by first wire . 02911.13 Mean 1 Chronometer fast 55.20 Chrorn Sid. time . . . . 0 28 15.93 1 6.01 19 Sid. til h. 7/1. s. 0 29 S6.33 55.20 0 28 31.13 Observer, W. C. B. No. of obs. 1 5.9 19 M ii> following limb. Mars follows star = 8.9 mag. Mars following limb. Mars follows star= 8.9 mag. First wire. 1 Second wire. | First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. *. m. I, m. «. h. m. 5. m. s. m. 5. s. 1 37 15.9 37 31.2 1 1.0 1 1.2 1 48 55.2 49 11.4 1 0.2 59.9 39 0.2 39 15.5 0.7 1.9 50 37.7 50 53.0 1 0.0 59.9 40 36 0 40 51.2 0.6 0.8 52 13.7 52 28.8 59.7 59.8 42 17.0 4232.2 1.0 1.0 53 55.2 54 10.3 59.7 59.5 43 57.7 44 12.8 0.5 0.3 55 34.2 55 49.5 59.6 59.5 45 35.7 45 50.9 0.3 0.4 57 1G.9 57 32.2 59.5 59.7 47 15.8 47 31.0 0.4 0.2 58 58.8 59 14.1 59.3 59.3 Remarks. High wind, and the atmosphere is very much disturbed. Not a favorable night. A a. No. of A. m. i. m. s. obs. h. m. s. Mean by first wire . 1 48 6.51 Mean by second wire 1 48 21.74 (Jhionometer last 55.18 Chronometer fast . 55. 18 Sid. time . , . . 1 47 11.33 1 0.18 14 Sid. time . . . . 1 47 26.58 Observer, G. P. B. 1 0.18 No. of obs. 14 DECEMBER 17 and 18, 1849. Mars following limb. Mars precedes star = 8.9 mag. Mars following limb. Mars precedes star = 8.9 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. *. m. ». •, «. A. m. s. m. s. 8, 8. 10 57 51.3 58 1.0 18.4 18.3 11 10 0.0 10 9.4 17.5 17.6 5856.8 59 6.3 18.4 18.6 15 19.0 15 29.0 17.0 17.0 59 51.1 60 1.0 18.2 18.2 16 15.9 16 26.0 17.0 16.7 11 0 45.1 0 55.4 17.9 17.5 17 15.0 17 24.9 17.1 16.9 1 55.7 2 5.5 18.0 18.0 18 19.8 18 29.7 17.2 16.7 2 53.0 3 1.3 18.0 18.0 19 16.3 19 26.2 17.0 17.0 4 0.4 4 9.9 18.4 17.9 20 22.2 20 31.8 17.1 17.2 5 49.0 5 58.8 17.8 17.9 22 35.2 23 45.1 17.0 16 9 6 37.2 6 47.0 17.8 17.9 24 46.4 24 56.2 17.1 17.0 7 35.0 7 45.0 18.0 18.2 30 31.3 30 40.0 15.9 16.3 8 30.9 8 40.0 18.0 18.2 Mean by first wire Chronometer f;i.-t Sid. time . . . AT THE OBSERVATORY, CAMBRIDGE, MASS. DEC KMHKIl 17 ami 18, 1849— Continued. A. m. s. 11 10 S.'i.SO 55. 2L 11 10 O.'J'J No. of ubs. 91 A. m. I. M«-nn by second wire . 11 II 5.51 ChroiioUM'ti Must . . 5J.21 ^i(l. tune .... 11 10 10.00 Observer, W. «,'. 13. 435 A a. No. of «. obs. 17.52 Mars inllowiriL' Mm!). Mar.- precedes star = 1 mag. (?) Mars following limb. Mara precedes star — 7 mag. (?) First win*. Second wire. First win-. Second wire. - Fir.-twire. Second wire. First wire. Second wire. h. m. s. m s. s. s. A. m. s. m. s. ,. s. 11 22 33.2 22 45.1 42.1 42. 1 11 30 31.3 30 40.0 42.0 42.0 21 56.2 43.0 h. m. s. Moan by first wire . 11 S6 33. 27 Chronometer fast . 55.21 Sid. time .... 11 25 38.06 42.05 No. of obs. h. m. *. Mean by second wire . 1126 7.10 Chronometer fast . . 55.21 Sid. tune .... 11 25 11.69 An. 43.03 No. of ob*. Mars following limb. Mars follows star = 8,9 mag. Mars following 1itnl>- Mars follows star = 8.9 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. *. i. A. m. 5. s. 11 39 33.7 15.5 . . . . . . 11 45 56.7 . . . 15.1 . . . « 17.6 15.4 . . . . 46 30.2 . . . 14.8 40 55.0 15.0 . . . 47 2.0 . . 14.8 ... 41 31.3 15.1 ... . • • 47 35.4 . . . 15.1 ... 42 4.6 15.2 . . * 48 8.2 . . . 15.8 42 46.2 15.1 . . . 48 44.4 . . . 15.0 . . . 43 24.5 15.0 . . . , . , 49 20.7 . . - 14.8 43 56.3 15.0 . . . . . . 49 55.5 . . 14.5 . . . 44 35.5 15.2 . . • 50 33.5 • . . 11.5 45 15.5 14 8 - « ' . . . .... Remark*. The star has a reddish tinge, but is not decidedly a red star. A Mar of the 6th magnitude is south, preceding the star of comparison ; difference of R. A. = 30s. ; diffeienco of declination 5'. The vision is bad and the planet low in the horizon. Observer, G. P. B. A a. No. ot' h. m. s. s. nhs. Mean by first wire 11 45 9.78 Chronometer fast 55. -21 Sid. time 11 44 14.57 15.04 19 in.< I:MIU;K is, 1849. Mars follow ng limb. Mars follows star = 9.10 mag. Mars following limb. Mars follows star := 8.9 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. s. 5. f. A. tn. s. m. *. s. s. 1 32 28.0 32 3f>.7 18.8 19.0 1 48 8.9 48 17.5 17.9 17.9 33 29.6 33 38.7 18.6 18.5 49 22.7 49 31.4 17.7 17.6 34 29.4 34 38 0 18.8 18.8 50 19.0 50 27.5 17.7 17.5 35 17.7 35 26 5 18.4 18.8 51 11.7 51 20.4 17.7 17.6 36 40.1 36 49.2 18.5 19.4 52 2.1 52 10.7 17.4 17.5 38 23.7 38 32 3 18.2 18.3 52 54.5 53 3.1 17.5 17.3 39 39.6 39 47 9 18.8 18.6 53 43.2 53 52.0 17.2 17.4 40 31.8 40 40.6 18.3 18 6 54 41.2 54 4'.'. 7 17 9 17.3 41 21.8 41 33.7 18.8 18.3 55 28.1 55 37.0 17.1 17.6 43 24.2 42 33.3 17.5 18.3 56 33.2 56 40.8 17.3 17.5 43 19.3 43 28.1 17.9 17 9 57 22.8 57 32.0 16.9 17.3 44 10.7 44 19.2 17.8 18.2 58 32.0 58 40.6 17.0 17.1 430 OPPOSITION OF MARS, 1849-50, DECEMBER IS, 1840— Continued. Remarks. Good definitions. Observer, W. C. B. Nn. of Mean by first wire Chronometer fast Sid. time . . . A. m. i. I 45 56.18 53.93 1 45 1.95 17.8 h 7)1, S. Mean liy second wire 1 46 5 29 C'lironiuiiitcr fast . 55. 2i Sid. time .... 14310.03 A a. No. of s. obs. J8.01 24 Mars following limb. M irs follows star = 9. 10 mag. Mars following limb. Mars follows star— 9. 10 mag. First wire. Second wire. First wire. Second wire. Firat wire. Second wire. First wire. Second wire. A. m. a. m. s. s. s. h m. s. m. *. s. s. 2 2 43 0 2 51.8 16.8 16.8 2 9 28 3 9 37.9 16.1 16.9 3 38.4 3 47.0 17.0 16.7 10 22 5 10 33.5 15.5 16.2 4 3-'. 4 4 41.0 16.1 17.0 11 2.3.0 11 35.3 16.2 16.1 5 23.7 16.7 12 11.8 12 20.8 15.9 17.8 6 47 3 6 53.0 16.8 16.6 h. m. s. Mean by first wire . 2 723.71 C.ironometer fast . . 55.23 Sid. time .... 2 6 28.48 A a. 16.32 No. of obs. A. m. s. Moan by second wire . 2 750.39 Chronometer fast . . 5.3.23 Sid. time 2 6 55.16 A a. 16.76 No. of obs. Mars following limb. Mars precedes star = 8. 9 mag. Mars following limb. Mars precedes star — 8.9 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. f. ». h. m, s. 8. 2 43 3.0 13.5 . . 2 46 36.3 . . . 13.2 '.3 S7.3 . 13.5 . . 47 7.6 . . . 13.3 . . <4 10.2 13.5 . . 48 0.-2 . . 13.0 . . 44 49.5 . . . 13.3 . 48 3?. 3 . . . 13.2 . . 45 21.3 • . . 13.4 49 6.5 • 13.1 . . 4556.0 . . . 13.3 ' ' 49 42 6 . . . 13.0 • • Remarks. A ftar of the same magnitude with the star of comparison, follows it by 4.2s., ami is 3' south of it. Observer, G. P. B. Mean by first wire Clmnomeler lii.-t Sid. time . . . It. m s. 2 46 20.23 55.33 2 45 25.00 Ad. 13.27 No. of o'js. Mars following limb. Mars follows star = 9. 10 mag. Mars following limb. Mars follows star= 9. lOmfg. Firrt wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. t. «. h. m. s. f. ft 52 13.5 13 0 2 56 2.8 12.7 52 45.4 . . . 1?.9 . . 56 44.0 12.5 53 17.7 . . . 12.7 . . 57 12.7 12.6 53 59.7 13.6 , 57 46.3 12.3 54 39.9 13.5 , , 58 25.4 12.5 5529.5 . . . 12.5 , . 58 58.3 . . * 12.4 . 59 31.2 . . . 12.2 • • Mean by first wire Chronometer fast Sid. time . . 7i. m. >. 2 55 55.88 55.23 2 55 0.65 A a. I. 12.65 No. of obt. 13 AT THE OBSERVATORY, CAMBRIDGE, MASS. DECEMBER 18 and 10, 1849. 437 Mars following limb. Mars precedes sttr — 9.10 mag. Mars following limb. Mars precedes star = 9.10 mag. First wire. Second wire. First wire. Second wire. First wite. Second wire. First wire. Second wire. A. m. i. m. t. *. >. A. m. s. m. s. t. s. 11 31 27.3 31 38.6 36.7 23.1 11 SO 54.0 51 5.0 27.3 27.6 3-2 37.8 3S 48.8 25.9 25.9 52 9.8 52 20.8 27.9 28.0 34 12. C 34 23.4 26.4 26.6 51 55.4 55 6.4 28.1 28.1 35 48.6 35 59.0 26.1 S6.8 50 13.6 53 26.6 28.1 28.2 37 20.7 37 31 4 28. 6 26.8 57 S9.0 57 40.0 28.1 28.0 39 41.6 39 53.7 26.8 26.5 58 39.3 58 49.9 27.7 27.9 40 50.9 41 1.9 26.8 26.8 59 55.5 60 6.5 28.2 28.3 42 6.3 42 17.0 S6 8 27.2 12 1 33.7 1 34.8 29.1 28.9 43 23 0 43 34.0 27.5 27.4 2 37.2 2 48.1 98.4 28.4 44 38.7 44 49.9 27.3 27.1 4 4.5 4 14.8 28.4 29.1 46 0.1 46 11.2 27.4 27.3 6 19.2 6 30.2 29.1 29.3 47 9.9 47 20.7 27.1 28.0 7 46.8 7 57.9 28.5 27.9 Remirks. Star is 1' north of Mars. Observer, VV. C. B. N. B. — The zero of the position circle on the evening of December 18th and on the morning of the 19th, was supposed to be 180° 0', instead of its true value, 170° 55' ; the Right Ascension differences will therefore require a small corrcclion. Mean by first wire Chronometer fast Sid. time . . . h. m. >. 11 49 39.90 55.23 11 48 31.67 A a. 27.51 No. of obs. 24 A. m. s. Mean by second wire . 11 49 40.86 Chronometer fast . . 55.23 Sid. time . . 11 48 45.63 A a. 27.59 No. of obs. 24 DECEMBER HI, 18419. Mars following limb. Mars follows star — 9 mag. Mars following limb. Mars follows stir = 9 mag. 1'irst wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. >. m. s. 5. s. A. m. s. m. t. s. s. 0 1 15.6 1 29.6 51.9 52.0 0 15 7.9 15 21.5 50.9 50.8 2 48.1 320 51.8 52.0 16 35.2 16 49.0 51.0 51.0 4 14.8 4 28.6 51.8 51.9 18 8 0 18 21.7 51.1 50.7 5 40.5 5 54.4 51.6 51.4 19 32.2 19 46.0 50.6 50.5 7 12.9 7 20.8 51.4 51.3 SO 58.6 21 12.4 50.6 50.6 8 39.6 8 53.4 51.6 51.4 22 33.0 22 46 7 50.5 50.4 10 8.6 10 23.5 51.3 51.4 21 23.8 21 37.7 50.3 50.4 11 31.2 11 45.0 51.3 51.3 25 48.8 26 2.7 50.3 50.1 14 40.5 14 54 3 51.0 51.2 27 18.4 27 32.0 50.3 50.0 Remarks. The star at O/i. 30m. is south of Mars' f out!) limb by 47" Observer, C. P. B. Mean by first wire Chronometer fast . Sid. time . . . A. fn. i. 0 II 15.43 56.02 0 13 19.41 An. 51.06 No. of oba. 18 A. m. >. Mean by second wire . 01429.21 Chronometer fast . . 56.02 Sid. lime 0 13 33.22 A a. 51.02 No. of obs. 18 438 OPPOSITION OP MARS, 1849-50, DECEMBER. 21, 18*9— Continued. Mars following limb. Mars follows star = 10 mag. Mars following limb. Mars follows star — 10 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. in. s. m. s. 5. s. h m. s. m. s. s. s. 0 56 .13.5 56 47.0 47.8 48.0 1 22 4.3 22 18.8 45.9 46.1 58 15.7 58 30.0 47.8 48.0 23 39.6 23 54.7 45.7 46.7 1 00 38.7 0 53.0 47.9 48.0 25 18.1 25 32.5 46 1 45.7 2 36.9 2 51.3 47.8 47.3 27 1.2 27 15.7 45.6 45.7 4 12.0 4 26.4 47.7 47.4 28 44.7 28 58.9 45.9 45.8 5 53.2 6 7.2 47.8 47.2 30 28.5 30 43.1 45.5 45.5 7 35.7 7 40.4 46.9 47.6 31 59.0 3-2 13.5 45.6 45.5 9 14.5 9 29.0 47.4 47.9 33 36.2 33 50.5 45.5 45.5 10 50.3 11 5.0 47.3 47.3 35 44.8 35 59.0 45.3 45.0 12 29.0 12 43.7 47.0 47.0 37 14.2 37 28.6 45.2 44.9 14 7.7 14 23.3 46.8 47.0 38 48.9 39 2.8 45.4 44.8 15 56.1 16 10.5 47.0 47.3 40 25.4 40 40.0 44.8 44.9 Mean by first wire Chronometer fast . Sid. time h, m, ». 1 18 53.22 56.04 1 17 57.18 No. of obs. h. 46.78 Mean by second wire . 1 19 7.66 Chronometer fast . . 56.04 21 Bid. time 1 18 11.62 Observer, W. C. B. 46.48 No. of obs. 24 Mars following litnb. Mars follows star = 10 mag. Mars following limb. Mars follows star — 10 mag. First wire. S d ' . . Socond wire. First wire. Second wire. h. m. i. m. s. t. s. h. m, s. m. s. s. s. 1 46 34.8 46 49.4 44.5 44.8 a 6 30.0 6 44.5 43.0 42.9 48 18.7 48 33.5 44.1 44.0 8 0.4 8 15.0 43.0 43.0 49 59.1 50 13.7 44.2 44.2 9 28.5 9 43.1 42.3 43.6 52 43.9 52 58.4 43.9 43.9 11 15.8 11 30.4 42.2 42.5 53 18.9 53 33.4 43.9 43.9 12 55.0 13 9.5 42.6 42.4 54 51.0 55 5.5 43.6 43.6 14 21.5 14 30.6 42.0 42.6 56 29.0 56 43.2 43.7 43.4 16 3.4 16 17.9 42.4 42.2 57 55.0 58 9.6 43.7 43.4 17 55.6 18 10.1 4-3.4 43.1 59 26.9 59 41.8 43.3 43.8 19 26.5 19 41.0 41.9 43.0 2 1 33.9 1 38.9 42.9 43.5 20 59.9 21 14.4 41.9 41.9 3 1.0 3 15.3 43.2 42.8 22 35.3 23 49.8 41.3 41.5 4 26.7 4 41.5 43.9 43.3 24 5.0 21 19.8 41.8 41.8 Mean by first wire Chronometer fast . Sid. time . . . h. m. s. 2 5 30.24 56.03 2 4 34.21 42.95 No. of obs. Mean by second wire Chronometer fast . 24 Sid. time . . . . Observer, W. C. B. h. m. s. 2 5 44.89 56.03 2 4 48.86 43 0 No. of obs. 24 DECEMBER 2T, 1849. Mars following limb. Mars follows star d. Mars following limb. Mars follows star d. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. t. 0 6 40.5 7 9.8 8 12.0 9 9.0 m. s. 6 51.7 7 20.2 8 22.7 9 19.3 «. 18.3 18.1 17.7 18.0 s. 18.4 17.7 18.1 18.0 h. m. s. 0 10 10.6 11 48.2 12 54.0 m. s. 10 21.5 11 59.0 13 5.0 s. 18.0 18.2 18.0 s. 18.0 18.0 18.0 AT THE OBSERVATORY, CAMBRIDGE, MASS. 439 DECEMBER 27, 1840— Continued. Remarks. Four stars of comparison were u=cd on this night: n =13 mag., 1' south nf Mars' centre at 1A. 40m ; ft = 7. 8 mag., BesseMOo; c = 8. 9 mag. ,2 north of Mars ; d =. 13 mag. ? 3 south. The star a was best situated and was most observed, but it was too faint to be well observed. Observer, W. C. B. Mean by first wire Chronometer fiist . Sid. time . . . K. m. s. 0 9 26. SO 58. S8 0 8 28.03 No. of obs. 18.03 A. m. 8. Mean by second wire . 0 937.08 Chronometer fast . . 58.28 Sid. lime . .08 38.78 No. of obs. 18.02 Mars following limb. Mars follows slar a. Mars following limb. Mars follows star a. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. B. 3. s. A. m. a. m. g. i. f. 0 22 25 8 22 41.7 51.0 51.7 1 2 23.8 2 44.4 49.1 49.3 26 33.0 26 47.2 51.5 50.9 6 38.0 6 52.7 49.0 49 2 38 89. 8 38 41.7 50.6 50.9 10 39.5 10 54 0 49.0 48.9 42 33.2 42 48.0 50.2 50.6 14 37.7 14 52.5 48.3 48.5 46 25.3 46 40.0 50.2 50.5 1826.G 18 41.5 47.8 48.4 50 22.0 50 37.2 49.6 49.9 22 30.0 22 44.5 48.1 48.0 54 9.8 54 21.9 49.7 49.9 26 17.8 26 32.5 47.6 47.5 58 39.0 58 53.8 49.6 49.8 Mean by first wire Chronometer last . Sid. time h. in. s. 0 57 25.2-2 58.28 0 56 26.94 49.12 No. of ubs. 15 h. m. 8. Mean by second wire . 0 57 39.97 Chronometer fast . . 58.28 Sid. time . . . . 0 55 41.69 49.54 No. of obs. 15 Mars following limb. Mars precedes star c. Mars following limb. Mars precedes star c. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. fi. m. «. m. t. ». 3. h. m. s. m. «. i. s. 0 38 29.8 38 44.7 38.4 37.5 1 6 38.0 6 52.7 40.0 39.8 42 33.2 42 48.0 38.9 38.4 10 39.5 10 54.0 39.6 40.0 46 25.3 46 40.0 38.7 36.3 14 37.7 14 52.5 40.3 40.1 50 22.0 50 37.2 39.0 38.9 18 26.6 18 41.5 41.0 40.7 54 9.8 54 24.9 39.7 38.1 22 30.0 22 44.5 40.3 40.9 58 39.0 58 53.8 39.3 39.0 26 17.8 26 32.5 41.2 41.2 1 2 29.8 2 41.4 39.4 39.4 Mean by first wire. Chronometer fast . Sid. time . . . h. m, 8. 1 2 29.12 58.28 1 1 30.24 An. 39.68 No. of obs. 13 A. m. f. Mean by second wire . 1 2 43.90 Chronometer fast . . 58.28 Sid. time .... 1 1 45.62 39.42 No. of obs. 13 Mars following limb. Mars precedes star b. Mars following limb. Mars precedes star b. First wire. Second wire. First wire. Second wire. First wire. Second wire** First wire. Second wire. A. m. s. m. 8. m. f. m. ». h. m. 8. m. s. m. «. m. >. 0 22 26.8 22 41.7 1 4.0 1 3.8 1 2 29.8 3 44.4 1 6.7 1 5.6 26 33.0 26 47.2 4.1 4.7 6 38.0 6 52.7 7.0 6.8 38 29.8 38 44.7 5.2 5.0 10 39.5 10 54 0 6.8 6.9 42 33.2 42 48.0 5.7 S.3 14 37.7 14 52.5 7.3 7.0 46 25.3 46 40.0 5.8 5.8 18 26.6 18 41.5 7.7 7.7 50 23 0 50 37.2 6.0 5.8 22 30.0 2i 44.5 7.7 7.5 54 9.8 54 24.9 6.5 5.3 26 17.8 26 32.5 7.9 8.3 • • • 58 53.8 • • 6.0 Mean by first wire Chronometer fast . Sid. time . . . A. m. f. 0 57 19.95 58.28 0 56 21.67 1 6.31 No. of obs. 14 h. m. t. Mean by second wire . 0 57 39.97 Chronometer fast . . 58.28 Sid. time . . . . 0 56 41.69 A a. m. f. 1 6.10 No. of obs. 15 440 OPPOSITION OF MARS, 1849-50, DECEMBER ZT, 1849— Continued. Mars following limit. M:i - follows star a. Mars following limb. Mars follows star o. Fire! wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. 3. m. s. a. X. h m. s. m. s. s. s. 2 £21.3 5 34.7- 45.3 45.2 2 17 48.0 18 1.2 44.3 44.2 6 45.2 6 58.5 45.2 45.1 19 13.9 19 27.0 44.4 44.5 8 11.5 824.3 45.0 44.7 20 47.0 21 0.0 44.2 44.0 9 40.2 9 53.3 44.8 44.7 22 13.5 22 25.5 44.0 44.1 11 1.5 11 14.8 44.7 44.8 S3 29.4 23 42.7 43.9 41.3 12 20.8 12 34.0 44.8 44.0 25 6.3 23 19.5 43.9 44.0 13 40.9 13 £4.0 44 7 41.5 26 23.0 26 41.1 43.8 43.8 15 5.3 15 18.4 44.5 4). 4 28 2.4 28 15.5 43.4 43.5 16 25.8 16 39.0 44.5 44.5 59 83.9 29 36.1 43.6 43.6 A. m. s. A a. No. of s. obs. A. m. *. Mean by first wire . . 2 17 16. 83 Mean by second wire . 2 17 29.97 Chronometer fast . 58.30 2 16 18.53 44.39 18 Chronometer last . . Sid time 58.30 2 16 31 67 No. of obs. 44.36 DECEMBER 27 and US, 1849. Mars following limb. Mars follows star o. Mars following limb. Mars follows star o. First wire. Second wire. First wire. Second wi:e. First wire. Second wire. First wire. Second wire. A. m. *. «. h. m. s. s. 11 32 24.3 . . . 8.5 . . 11 41 14.8 . . . 7.4 ^ 3323.4 . . . 7.9 . . 41 31.4 ... 7.4 _ 33 49.9 . . . 7.9 . . 41 49.8 ... 7.4 . 34 86.8 . . . 7.4 . . 42 12.0 7.4 34 46.8 . . . 7.8 . . 42 27.5 ... 7.2 . 35 3.3 . . . 8.0 . . 42 51.2 ... 7.4 . 3522.4 . . . 8.0 . . 43 17.0 i 7.5 35 44.3 . . . 7.8 . . 43 33.4 ... 7.4 _ 36 3.9 7.7 . . 43 50.0 . 7.1 36 35.0 . . . 8.0 44 16.2 7.4 36 46.0 . . . 7.6 , 45 27.9 . 7.4 37 11. S 7.6 . . 46 2.0 . 7.2 37 28.3 . . . 7.8 . . 46 32.9 . 7.4 37 56.7 . . . 7.7 . , 46 50.0 7.5 39 54.7 . . . 7.7 . 47 3.9 . 7.4 40 17.3 . . . 7.5 47 21.0 7.0 40 41.0 • • •. 8.1 • • Remarks. The stars of comparison are the same as those used on llie 27th. Observer, W. C. B. . . . Mean by first wire 11 40 7.53 Chronometer fast 58 50 Sid. time 11 39 9.03 A a. 7.59 No. of obs. Mars following limb. Mars follows star a. Mars following limb. Mars follows star a. First wire. Second wire. First wire. Second wire. Fir^t wire. Second wire. First wire. Second wire. A. m. i. m. s. i. *. A. m. s. 11 45 80 50 58.2 55 40.8 51 13.8 55 56.2 5.8 5.4 6.3 6.2 12 0 15.7 4 33.0 0 30.2 4 48.3 6.2 5.1 6.3 5.7 AT THE OBSERVATORY, CAMBRIDGE, MASS. DECEMBER 27 and 38, 1849— Continued. h. m. s. Mean by first wire . 0 57 19.14 Chronometer fast . . 58.50 Sid. lime . 0 56 20.64 5.82 441 No. of A u. No. of obs. K. m. *. s. obs. Mean by second wire . 0 58 6.85 Chronometer fast . 58.50 5 Sid. time . 0 57 8.35 6.12 4 Mars following limb. Mars precedes star d. Mara following limb. Mars precedes star d. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. s. s. s. h. m. s. m. s. s. s. 11 55 40.8 55 56.3 28.7 27.2 12 16 31.3 16 45.5 28.7 29.2 12 0 15.7 0 30.2 28.7 28.6 20 6.2 20 21.0 29.1 29.0 10 40.4 10 55.2 28.8 28.0 27 1.9 27 16.4 30.0 30.0 h. m. s. .Mean by first wire . . 12 11 42.57 Chronometer fast . . 58.50 Sid. time . . . . 12 10 44.07 A a. No. of s. obs. 29.00 h. m. s. Mean by second wire . 12 11 57.42 Chronometer fast . . 58.50 Sid. time. . 12 H 58.92 A a. No. of s. obs. 28.77 Mars following limb. Mars follows star c = 9 raag. Mars following limb. Mars follows star c = 9 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. *. s. s. h. m. s. m. 5. s. 9. 11 50 58.2 51 12.8 21.6 21.4 12 10 40.4 10 55.2 22.3 23.2 ee 111.8 55 56.2 22.5 21.8 16 31.3 16 45.5 22 7 23.6 12 0 15.7 0 30.2 22. 0 22.2 20 6.2 20 21.0 23.6 23.6 4 33.0 4 48.2 22.4 22.2 27 1.0 27 16.4 23.8 23.8 h. m. s. Mean by first wire .12 928.32 Chronometer fast . . 58.50 SM. time . 12 8 29.82 A a. 22.61 No. of obs. A. m. «. Mean by second wire . 12 943.19 Chronometer fast . . 58.50 Sid. time . . 12 8 44.69 A a. 22.72 No. of obs. Mars following limb. Mars precedes star b. Mars following limb. Mars precedes star b. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. a. s. s. A. m. s. m. s. s. s. 11 50 58.2 51 12.8 21.6 21.4 12 10 40.4 10 55.2 22.3 23.2 55 40.8 55 56.2 22 5 21.8 16 31.3 16 45.5 22.7 23.6 12 0 15.7 30.2 22.0 22.2 20 6.2 20 21.0 23.6 23.6 4 33.0 4 48.2 22.4 22.2 27 1.0 27 16.4 23.8 23.8 h. m. f. Mean by first wire . 12 9 28.32 Chronometer fast . . 58.50 Bid. time . 12 8 29.82 A a. 22.61 No. of obs. h. m. ». Mean by second wire . 12 943.19 Chronometer fast . . 58.50 Sid. time . . 12 8 44.69 A a. No. of c. obs. 22.72 56 442 OPPOSITION OF MARS, 1849-50, DECEMBER 38, 1849. Mars following limb. Mars follows star — 8 mag. Mars following limb. Mars follows star = 8 mag. First \virf. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. s. m. s. s. s. A. TO. S. JO. S. Ik s. 0 45 19.3 17.6 . , 1 2 4.5 2 15.2 16.0 16.8 47 13.0 17.2 3 11.3 16.7 49 14.3 49 24.3 17.4 17.5 452.4 5 1.7 17.1 16.9 50 17.0 50 28.0 16.5 17.5 8 15.2 824.2 16.9 16.3 51 19.8 51 29.7 17.4 17.7 9 6.0 9 15.3 16.0 15.8 52 14.3 M 24.2 17.1 16.9 10 0.5 10 10.0 16.1 16.0 53 11.3 53 21.6 16.6 16.8 10 47.0 10 56.7 15.9 16.2 54 8.3 . • 16.2 11 40.0 11 50.0 16.0 16.3 59 19.7 59 29.7 16.7 16.7 . . . 13 58.0 . . 16.0 1 0 16.0 36.3 16.5 16.3 1 8.8 1 19.0 16.5 16.8 Remarks. The star is 4' south of Mars. Observer, W. C. B. Mean by first wire Chronometer fast Sid. time . . . h. m. 8. 0 59 48.09 58.78 0 58 49.31 A ,'. 16.62 No. of obs. 18 h. m. s. Mean by second wire . 1 1 2.23 Chronometer fast . . 58.78 Sid. time 10 3.45 A a. 16.69 No. of obs. 17 Mars following limb. Mars follows star = 8 mag. Mars following limb. Mars follows star = 8 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h. m. 5. a. h, m. s. s. 1 15 26.0 . . . 16.0 . . 1 28 25. 0 . • . 14.5 . 16 22.2 . . . 15.9 29 5.4 • . > 15.0 . 17 20.1 . . . 15.7 29 46.0 t 15.1 18 0.0 . . . 15.5 , 30 28.1 • « . 14.8 18 37.2 . . . 15.3 . . 31 7.0 • • > 14.7 , 19 33.2 15.7 . 31 45.0 15.2 20 13.3 . . . 15.3 32 23.3 14.8 20 51.4 15.4 . 33 4.4 . 14.6 21 33.0 . . . 15.7 . 33 45.5 . 14.5 23 10.4 . . . 15.3 . . 34 24.1 14.7 22 59.8 15.4 . 35 1.5 . 14.5 23 45.0 . . . 15.0 36 1.3 . 14.6 24 26.0 . . . 15.6 . . 36 49.6 14.6 25 6.8 • • • 15.5 • • 37 35.0 . . . 15.0 • • Mean by first wire Chronometer fast . Sid. time A. m. 5. 1 26 43. 17 58.78 1 25 44.39 A a. 15.14 No. of obs. AT THE OBSERVATORY, CAMBRIDGE, MASS. DECEMBER 88, 1849— Continued. 443 Mars following limb. Mars follows star = 8 mag. Mars following limb. Mars follows star = 8 mag. First wire. Second wire. First win'. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. s. h, m. s. s. I 51 43.0 13.1 . 2 5 24.9 . . . 12.7 55 51.5 13.4 . . 6 2.5 . . . 12.6 . . 57 19.4 . . . 13.2 . . 6 45.0 . . . 12.5 59 4.3- . . * 13.4 7 23.3 * . . 12.3 59 58.6 . . 13.6 . . 8 29.0 12.6 . . 2 0 57.8 12.8 9 9.5 . • . 12.5 . . 1 56.9 ... 13.8 . . 9 51.5 . . . 12.1 . . 3 16.0 . . . 13.0 . . 10 40.5 . . 12.5 , . 4 4.0 12.4 . . 11 43.3 12.3 . , 4 43.0 . . . 13.0 • • 13 8.1 . . . 12.2 Mean by first win; Chronometer fast . Sid. time . . . A. m. s. 2 4 24.50 58.78 2 3 25.72 A a. j. 12.70 No. of obs. 20 DECEMBER 89 and 30, 1849. Mars following limb. Mars follows star 0 = 8 mag. Mars following limb. Mars follows star 0 = 8 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. h, m. s. m. s. a. s. h. m. s. m. a. 5. a. 11 20 31.0 20 44.0 18.8 19.0 11 45 59.4 46 12.7 17.8 18.1 22 49.3 23 1.8 19.7 18.8 48 4.5 48 17.8 17.6 17.9 25 0.9 25 14.1 18.9 19.3 50 13.0 50 26.2 17.8 18.0 27 9.0 27 22.0 17.8 18.5 54 17.8 54 31.0 17.8 17.9 29 47.8 30 0.7 19.1 18.9 56 16.2 56 29.2 17.4 17.2 31 58.0 32 11.0 18.8 18.8 58 37.3 58 50.5 17.4 17.5 34 34.7 34 48.0 18.9 19.0 12 0 44.0 57.3 17.5 17.3 36 40.0 36 53.0 19.0 18.7 3 59.6 4 12.8 18.2 17.3 38 45.7 38 59.0 18.6 18.6 6 4.2 6 17.2 16.9 16.8 41 38.6 41 52.0 18.3 18.7 8 9.0 822.0 17.0 16.7 43 50.5 44 3.7 18.3 18.4 Remarks, Two stars (a and i) were used at HA. 20m.; a was north of Mars' north limb by 4', and J by 3'. Observer, W. C. B. A. m. s, Mean by first wire . 11 44 3.36 Chronometer fast . . 59.05 Sid. time . . . . 11 43 5.31 A a. s. 18.28 No. of obs. 21 A. m. e, Mean by second wire . 11 44 16.48 Chronometer fast . . 59.05 Sid. time 11 43 17.43 A o. 17.88 No. of obs. 21 Mars following limb. Mars follows star b = 15 mag. Mars following limb. Mars follows star 6 = 15 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. in. 3. 3. 3. A. m. s. m. s. *. 8. 20 44.0 29.1 11 45 59.4 46 12.7 27.8 27.3 11 23 49.3 23 1.8 29.7 2<).l 48 4.5 48 17.8 27.7 27.8 25 0.7 25 14.1 29.5 29.1 50 13.0 50 26.2 27.6 27.2 27 9.0 27 22.0 29.0 28.7 54 17.8 54 31.0 27.6 27.5 29 47.8 30 0.7 29.2 28.7 56 16.2 56 29.2 27.2 27.1 31 58.0 32 11.0 28.9 29.0 58 37.3 58 60.5 27.3 27.5 34 34.7 34 48.0 28.5 39.0 12 0 44.0 0 57.3 26.8 27.0 36 40.0 36 53.0 28.5 28.3 3 59.6 3 12.8 S6.8 26.8 38 45.7 38 59.0 28.6 28.2 6 4.2 6 17.2 36.8 26.2 41 38.6 41 52.0 28.1 28.6 8 9.0 8 22.0 26. 6 26.5 43 50.5 44 3.7 28.2 28.2 444 OPPOSITION OF MARS, 1849-50, DECEMBER »9 and 30, 1849— Continued. A a. No of It. 1/1. s. s. obs. h. in. s. Menu liy lirsl wire . 11 45 13.97 Mean by second wire . 11 44 16.48 Chronometer faet . 59.05 Chronometer fast . 59.05 Sid. time . . . . 11 44 14.92 28.02 20 Sid. time .... 11 43 17.43 27.95 No. of obs. 31 DKCEMBER 3O, 1849. Mars following limb. Mars follows star 0 = 8 mag. Mars following limb. Mars follows star a = 8 mag. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. m. s. s. s. h. m, s. m. s. s. s. 0 56 58.0 57 10.2 33.7 33.2 1 15 54.1 16 6.5 32.1 32.3 58 30.3 58 43.5 33.4 33.3 18 11.9 18 24.2 32.1 32.0 1 0 2.1 0 14.3 33.1 33 0 20 27.8 20 40.0 3!. 8 31.8 1 19.9 1 32.6 32.8 33.3 21 47.0 21 59.2 31.9 31.7 2 33.7 2 46.0 33.4 33.0 23 9.0 23 21.2 31.8 31.5 4 4.6 4 17.1 32.8 32.9 24 45.3 24 57.5 31.8 32.2 5 27.4 5 39.9 32.6 32.9 26 14.5 26 26.7 31.3 31.5 7 31.4 7 43.9 32.6 32.8 27 33.3 27 45.5 31.4 31.5 8 57.5 9 9.8 32.6 32.5 28 50.2 29 2.3 31.6 31.3 10 43.1 10 55.5 32.8 32 6 30 10.5 30 22.7 30.9 31.4 12 9.3 12 21.5 32.3 32.3 32 2.7 32 15.0 31.4 31.8 14 2.4 14 14.3 31.9 32.0 33 44.8 30.8 Remarks. The star is 4' north of Mars. Observer, W. C. B. A. m. s. A a. B. No. of obs. li. m. s. Mean by first wire . 1 15 12.96 Mean by second wire . 1 14 36.89 Chronometer fast . Sid. time . . . 59.10 . 1 14 13.86 32.20 24 Chronometer fast • . Sid. time . , 59.10 1 13 37.79 DECEMBER 31, 1849. 32.20 No. of Ol)3 23 Mars following limb. Mars precedes Bessei 405. Mars following limb. Mars precedes Besscl 405. First wire. Second wire. First wire. Second wire. First wire. Second wire. First wire. Second wire. A. m. s. a. h. m. s. s. 6 39 59.8 15.7 6 50 32.3 15.7 43 27.6 . . . 15.4 51 38. 8 ... 15.9 g 44 20.7 . . . 15.8 52 13.3 15.8 45 18.8 15.7 . . 52 52.0 l « 16.0 46 42.4 16.2 53 30.0 16.1 47 21.7 . . . 15.8 54 S.9 16.2 47 59.5 . . . 15.6 . 54 50.5 16.1 48 39.0 . . . 15.9 . . 55 34.5 16.2 49 20.5 . . . 15.7 . . 58 11.6 16.4 49 54.5 . . . 15.7 • • 5851.8 . . . 16.2 • • Remarks. Seen through openings in the clouds. Observer, G. P. B. h. m. s. Mean by first wire 6 50 10.31 Chronometer fast . 59 18 si. Sid. time 12 0 39. Ext. ther. 22°. A a cos. J. 3 .75 — 0.16 3 6.59 Observer, G. P. B. No. of obs. 17 DECEMBER IS. 1S49. Mars following limb follows star = 9-10 mag. Mars following limb follows star = 9.10 mag. Mars following limb follows star = 9. 10 mag. Mars following limb follows star = 9. 10 mag. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. h. m. s. 2 1850 20 15 21 15 Rev. 71.50 .30 .17 h. m. s. 2 23 0 23 52 Rev. 70.83 .92 h. m. s. 2 27 25 28 48 30 10 Rn. 70.39 .46 .32 h. m. s. 2 31 18 33 0 Rev. 70.98 .87 h. m. s. Mean . . . . 2 21 26.40 Chronometer fast 52.23 Sid. time . . 2 20 31.17 A a cos. i5. / // 3 27.09 — 0.18 3 26.91 No. of obs. h. m. s. Mean . . . . 2 30 8. SO Chronometer fast 55.23 Sid. time . . . 2 29 13.97 A a cos. £ 3 21.76 . 0.17 3 21.59 No. of obs. Ext. ther. 22°. Observer, G. P. B. AT THE OBSERVATORY, CAMBRIDGE, MASS. DECEMBER 31, 1849. 451 1 Mars following limb follows Mars following limb follows Mars following limb follows Mars following limb follow* lli'i-sfl 405. l;r.,jid 405. lif-sul 405. i 405. Time by cliron'r. Micrometer. Time hy chrou'r. Micrometer. Time by chron'r. Micrometer. Time by clirorTr. Micrometer. A. m. s. Ree. li. m. i'. Reo. A. m- s. Her. k. m, a. Rev. 0 28 37 59.03 0 32 37 58.69 0 39 3 58. ia 0 46 20 57.72 30 25 58.86 33 50 .03 41 17 .11 47 8 .68 31 38 .« 44 50 57.84 48 50 .59 a cos. Micr, No. of a cos. I. Micr. No. of h. in. s. Rev. oils. Mean .... 0 31 25.40 1 26.00 58.810 Chronometer fa>t 59.18 — 0.07 Zero, 50. 035 Sid. time . . . 03023.22 125.93 8.77J 5 A. m. s. Rev. Mean . . . . 0 44 34.66 1 7.72 56.843 Chronometer fast 59.18 — 0.06 Zero, 50.035 Sid. time . . . 04335.48 1 7.66 6.808 obs. Ext. thcr. 18°. Observer, G. P. B. JANUARY 6, 1850. Mars following bmb follows star = 13 mag. Mars following limb follows star — 13 mag. Mars following limb follows star — 13 mag. Mars following limb follows star — 13 mag. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. A. m. s. Ren. A. m. s. Reo. A. m. s. Rev. A. m. s. Reo. 0 53 13.0 56.360 1 321.0 55.738 I 11 1.5 55.247 1 16 47.5 54.975 56 35.0 .120 4 49.5 .830 12 6 .176 18 30 .965 58 34.0 .178 5 59.0 .540 13 18 .150 22 39 -.562 50 47.5 55.850 7 15.0 .430 14 23 .015 23 47 .483 1 00 42.0 .878 8 58.5 .355 15 45.5 54.902 26 18 .463 A. m. a. Mean 1 941.50 Chronometer fast 1 1.09 Sid. time 18 40.41 A a co.«. .?. Micr. Rev. 55.360 0 52.27 - 0.05 Zero, 50.026 0 52.22 5.334 Observer, G. P. B. No. of obs. 20 Mars following limb follows star = 13 mag. Mars following limb follows star = 13 mag. Mars following limb follows star — 13 mag. Mars following limb follows star -- 13 mag. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. A. m. f. 1 49 22 51 9 Rtat. 47.080 150 A. m. a. 1 52 15 Rev. 47.382 A. m. s. 1 53 54.0 56 3.5 Rev. 47.610 .788 A. m. a. 1 57 52 Rev. 47.773 A. m. s. Mean I 53 25.92 Chronometer fast ] 1.09 Sid. time 1 52 24.83 A a cos. 3. i n 0 25.11 — 0.02 Zero, 50.026 Micr. Rfv. 47.464 No. of obs. 0 25.09 2.562 E«. thcr. 17°. 452 OPPOSITION OP MAKS, 1849-50. JASTUARY 1O, 1850. Mars following limb follows star = JO mag. Mars following limb follows star = 10 mag. Mars following limb follows star = 10 mag. Mars following limb follows star = 10 mag. Time bychron'r. Micrometer. Time bychron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. A. m. s. Rev. A. m. s. Rev. A, m. s. Rev. k. m. s. Rev. 1 49 29 51.85 I 55 24 51.66 2 4 29 51.27 2 11 4S 50.69 50 50 .75 56 33 .CO 6 33 .17 13 16 .65 52 7 .84 57 35 .55 7 39 .04 14 40 .64 53 25 .75 0 17 .43 8 30 .06 16 5 .62 5425 .78 2 01 .37 9 31 .00 ]8 37 .57 1055 50.73 h. m. s. Mean 23 31.81 Chronometer fast ... 1 0.65 Sid. time . . 2 2 31.16 A a cos. I. i n 0 11.83 — 0.01 0 11.82 Micr. Rev. 51.239 Zero, 50.0 1.207 No. of obs. 21 Ext. thcr. 15'. DECLINATIONS OP MARS. NOVEMBER. 11 and 15, 1819. Mars' S. limb, S. of Bessel 348. Mars' S. limb, S. ot Bessel 348. Mars' N. limb, S. of Bessel 348. Mars' N. limb, S. of Bessel 348. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. h. m. a. Rev. h. m, s. Rev. A. m. a. • Rev. h. m. 8. Rev. 6 25 25 67.00 6 37.00 66.77 6 51 0 65.03 737 64.94 32 50 66.82 41.10 .76 55 57 64. 96 Remarks. Images unsteady. Observer, G. P. B. A I. Micr. No. of h. m. s. ' " Rev. obs. Mean . . . . 6 34 6.25 2 44.68 66.837 Chronometer list 310.74 — 0.05 Zero, 50.033 Sid. time . . . 6 30 55.51 2 44.63 16.804 4 A 1. Micr. No. of h. in. s. ' " Rev. obs. Mean . . . . 6 56 41.33 2 26.45 64.977 Chronometer fast 3 10.74 — 0.05 Zero, 50.033 Sid. time . . 6 53 30.59 2 26.40 14.944 3 Ext. ther. 38°. NOVEMBER 15 ana 16, 1819. Mars' N. limb, 8. of H. C. 12554. Mars compared with unknown star. Time by chron'r. Micrometer. Time by chron'r. Micrometer. h. m. s. Rea. h. m. 8. Rev. 9 51 0 29.33 10 0 0 44.54 1 55 .46 820 .50 A ,5. h. m. s. Mean . . . . 9 51 0.00 3 23. Chronometer fast 50.65 — 0.10 Zero, 50.05 Sid. time . . . 9 50 9.35 3 22.56 20.72 Micr. No. of Rev. obs. 29.33 Observer, G. P. B. A I. Micr. h m. 8. ,< a Rev. Mean . . . . 10 3 41.66 0 54.39 44.50 Chronometer fast 50.65 — 0.03 Zero, 50.05 Sid. time . . . 10 351.01 054.36 5.55 Ext. ther. 30°. No. of obs. NOVEMBER 16, 1849. Mars' N. limb, S. of H. O. 12554. Mars' N. limb, S. ofH. C. 12554. Mars' N. limb, S. of H. C. 12554. Mars' N. limb, S. of H. C. 12554. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. h. m. s. 2 33 8 Rev. 57.00 h. m. s. 2 36 00 Rev. 57.00 h. m. s. 2 37 58 Rev. 56.99 h. m. s. 2 39 40 Rev. 56.96 Remarks. Disturbed atmosphere. Observer, G. P. B. h, m. s. Mean 23641.50 Chronometer fast . . 50.65 Sid. time . . S 35 50.84 A I. Micr. No. of Rev. obi. 1 7.82 56.987 — 0.03 Zero, 50.067 1 7.79 6.920 4 454 OPPOSITION OP MARS, 1849-50, NOVEMBER 1C, 1849— Continued. Mare' S. limb, S. of H. C. 13554. Mars' S. limb, S. of H. C. 13554. Mars' S. limb, S. of H. C. 12554. Mars' S. limb, 8. of H. C. 12554. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. A. m. a. 2 43 1 Rev. £8.40 It. nt s. 2 49 36 Rev. 58.42 h. m. s. 2 46 58 Rev. 58.31 h. m. s. 2 48 48 Rev. 58.37 A. m. s. Mean 2 47 5.75 Chronometer fast . . 50.66 Sid. time . . 2 46 55.09 A I. i n \ 21. 43 — 0.03 1 21.39 Micr. Rev. 58.375 Zero, 50.067 8.308 No. of obs. Ext. ther. : NOVEMBER 16 and 17, 1849. Mars' N. limb, S. of H. C. 12554. Mars' N. limb, S. of H. C. 12554. Time by chron'r. Micrometer. Time by chron'r. Micrometer. h. m. s. 10 30 10 Ren. 51.98 h. m. s. 10 36 5 fin. 51.83 Remarks. Good seeing. Observer, G. P. B. A. m. s. Mean 10 33 7.50 Chronometer fast . . 50.95 Sid. time 10 3S 16.55 A i. i ii 0 18.08 — 0.01 0 18.07 Eit. ther. 30°. Mier. Rev. 51.905 Zero, 50.060 1.815 No. of obs. NOVEMBER 31, 1849. Mars' S. limb, N. of Bessel 523. Mars' S. limb, N. of Bcsscl.533. Mars' N. limb, N. of Besscl 523. Mars' N. limb, N. of Bessel 523. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. h. m. 9. Rtv. h. m. '• Rev. h. m. s. Re a. h. m. t. Beii. 3 8 12 C8.120 3 16 5 68.405 3 24 45 70.235 3 30 5 "0.350 10 10 .130 17 50 .403 27 30 .246 32 57 .219 11 18 .145 19 30 .324 28 55 .340 12 45 .215 21 20 .373 1350 .277 22 50 .396 A I. Micr. No. of * *»• '• Rev. obs. Mean , . . . 3 15 23.00 2 58.71 68.279 Chronometer fast . 53.24 _ 0.06 Zero, 50. 045 Sid. time . . , 31429.76 258.65 18.234 10 A I. i n Micr. No. of h. m. s. ' " Rev. obs. Mean . . . . 3 28 50.40 3 18.32 70.282 Chronometer fast . 53.24 — 0.06 Zero, 50.045 Sid. time . . . 3 27 57.16 3 18.26 20.237 5 Eit. ther. 38°. AT THE OBSERVATORY, CAMBRIDGE, MASS. NOVEMBER 21 nnd 32, 1849. 455 Mars' S. limb, N. of Bcssel 5:23. Mars' 8. limb, N. of Besael 533. M ir-' \. limb, N. of Bessel 533. Mars' N. limb, N. of Bessel 523. Time by ehron'r. Micrometer. Tun'- I'y chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. h. m, i. Ren. h. m. s. Rev. h. m. a. Rev. A. m. ». Rev. 10 7 0 74.38 10 12 25 7J.:i> 10 17 50 76.01 10 31 30 75.99 a as .30 11 05 .35 19 05 .01 2230 .98 9 35 .33 15 20 .33 20 20 .00 AJ. Micr. No. of Jiff. obs. 74.335 A. m. s. Mean . . . . 10 11 8.23 3 58.06 Chronometer fast 53.33 — 0.09 Zero, 50.043 Bid. time . . . 10 10 14.90 3 57.97 24.292 6 Ejt. ther. 36°. A. 3 6 55 28.28 3 9 30 28.27 3 12 11 26.76 3 15 25 26.72 8 0 .33 10 20 .32 13 25 .66 16 27 .67 836 .28 14 35 .75 A t. Mic. No. of A.m. '• Rev. obs. Mean .... 3 8 40.20 3 33.02 28.296 Chronometer fast 58.50 — 0.14 Zero, 50. 033 Sid. time ... 3 741.70 332.88 21.737 5 Bit. ther. 25°. A t. Mic. No. of *• m. I. i a Rev. obs. Mean . . . . 3 14 24.60 3 48.55 26.712 Chronometer fast 58.50 — 0.15 Zero, 50.033 Sid. time . . . 31426.10 348.40 23.321 5 Observer, G. P. B. DECEMBER 39 and 3O, 1849. Mars' N. limb, S. of star o. Mara' N. limb, S. of star o. Mars^N. limb, S. of star a. Mars' N. limb, S. of star a. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. ft. m, t. IS 15 0 fin. 26.71 A. m. a. 12 21 51 Am. 26.28 h. m. s. 12 17 0 Rev. 31.17 ft. m. s. 12 19 0 Rev. 31.24 h. m. s. Mem 12 18 13.75 Chronometer fast . . 59.05 Kid. time . . . . 12 17 13.70 Ext. ther. 25". A A / // 3 52.06 — 0.15 3 51.91 Micr. Ren. 26.350 Zero, 50.030 23.680 No. of obs. Observer, W. C. B. AT THE OBSERVATORY, CAMBRIDGE, MASS. DECEMBER 11, Is in. 459 Mars' B. limb, N. of Bessel 405. Mars' S. limb, N. of Bessel 405. Mars' 8. limb, N. of Bessel 405. Mars' S limb, N. of Bcsscl 405. Time by chron'r. Micrometer. Time by cbron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. A. m. v. •M, h. m. a. Rev. A. m. s. BM. A. tn. «. Rev. 5 33 25 42.75 5 42 45 42.67 6 4 40 43.00 6 30 30 42.76 39 40 .90 47 23 .56 25 30 42.78 32 35 .88 41 50 .69 53 40 .65 28 0 42.89 35 15 .84 Mean . . . A. m. t. 6 5 1.08 Ad. 1 11.09 Mior. Rev. 42.781 No. of obs. Chronometer fast . 59.10 — 0.06 Zero, 50.035 Sid. time . . . . 6 4 1.98 1 11.03 7.254 12 Ext, trrcr. 18*. Observer, G. P. B. JANUARY 1, 1850. Mars' N. limb, N. of Besscl 405. Mars' N. limb, N. of Bessel 405. Mars' S. limb, N. of Bessel 405. Mara' S. limb, N. of Bessel 405. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. A. m. * . Rev. A. m. 9. Ret). h. m. s. Rev. h. m. ». Rev. 1 43 8 53.544 1 55 3 46.530 2 5 55 53.325 2 9 10 53.325 44 45 .500 57 25 .527 46 20 .55K 59 0 .600 47 30 .505 2 1 40 .603 51 33 46.575 At. h. m. ». Mean . . . . 1 51 49.33 0 3.67 Chronometer fast 59.37 — 0.00 Zero, 50.034 Sid. time . . 1 50 49.96 0 3.67 0.374 Micr. No. of Rev. obs. 49.660 Ext. ther. 18". A I. A.m. ». ' » Mean .... 2 7 32.50 0 32.25 Chronometer fast 59.37 — 0.02 Zero, 50.034 Sid. time . . . 2 6 33.13 032.23 3.291 Observer, W. C. B. Micr. No. of Rev. obs. 53.325 JANUARY 4, 1850. Mars' N. limb, B. of Bessel 523. Mars' N. limb, S. of Besscl 523. Mars' N. limb, S. of Bessel 523. Mars' N. limb, S. of Bcssel 523. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. km. i, 1 44 37 Rev. 45.47 A. m. >. 1 47 10 Rev. 45.35 A. m. i. 1 495 Rev. 45.24 A.m. ». 1 51 5 Rev. 45.39 Mean .... Chronometer fait . Sid. time h. m. >. 1 47 59.42 1 0.60 1 46 58.82 AJ. 0 46.08 — 0.03 0 46.05 Kit. ther. 25', Micr. Rev. 45.340 Zero, 50.032 4.692 No, of obs. 460 OPPOSITION OF MAKS, 1849-50. JANUARY 5, 1S50. Mars' N. limb, S. of Bessel 523. Mars' N. liiuli, S . of Bessel 523, Mars' S. limb, S. of Bessel 523. Mars' S. limb, S. of Bessel 523. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. k. m s. Rev. h. m. s. Rev. h. m. s. Rev. h. m. s. Rev. 4 2927 60.880 4 39 26 61.050 •I 47 40 62.572 4 58 25 62.776 32 49 .925 43 32.5 60.970 50 53 .613 527 .810 36 5 .850 55 3 .685 A i. Micr. No. of h. m. l. Rev. obs. Mean .... 4 36 15.90 1 46.89 60.935 Chronometer fast 1 0.88 — 0.08 Zero, 50.028 Sid. time . . . 43515.02 146.81 10.907 5 Ext. ther. 21°. Ai. h. m. s. Mean . . . . 4 54 48.00 1 45.10 Chronometer fast 1 0.88 — 0.09 Zero, 50.028 Sid. time . . . 4 53 47.12 1 45.01 IS. 663 Observer, W. U. B. Micr. No. of Rev. obs. 63.691 JANUARY 6, 1830. Mars' S. limb, N. of star = 13 mag. Mars' S. limb, N. of star = 13 mag. Mars' S. limb, N. of star = 13 mag. Mars' S. limb, N. of star = 13 mag. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. Time by chron'r. Micrometer. A. m. >. 1 3220 34 10 Rev. 68.490 .455 h. m. s. 1 35 5 37 0 Rev. 68.355 .400 h. m. s. I 37 55 39 10 Rev. 68.440 .408 h. m. s. I 40 10 Rev. 68.390 h. m. s. . 1 36 32.86 d£ i a 3 0 26 Micr. Rev. 68 420 No. of obs. Chronometer fast . . 1 1.09 . 1 35 31 77 — 0.16 3 0 10 Zero, 50. 026 8 394 7 E*t. ther. 17°. Observer, W . C. B. JANUARY 10, 1850. Mars' S. limb, N. of star = 10 mag. Mars' 3. limb, N. of star = 10 mag. Mars' S. limb, N. of star = 10 mag. Mars' S. limb, N. of star = 10 mag. Time by chron'r. Micrometer. Time by chron'r. Micrometer* Time by chron'r. Micrometer. Time by chron'r. Micrometer. A. m. f* 3 23 49 25 18 Rev. 71.85 .81 h. m. a. 2 26 18 27 0 Rev. 71.87 .90 h. m. s. 2 28 13 29 24 Rev, 71.91 .87 h. m. s. 2 30 19 Rev. 71.87 h. m. i. Mean 3 27 28.71 Chronometer fast . , 1 0.65 Bid. time 2 26 28.06 A* / // 3 34.00 — 0.20 3 33.80 Observer, W, C. B. Micr. Rev. 71.869 Zero, 50.032 21.837 No. of obs. OPPOSITION OF MARS, 1849--50. MICBOMETRICAL OBSERVATIONS, WITH THE 8i-FEET EQUATORIAL, AT THE ROYAL OBSERVATORY, CAPE OF GOOD HOPE: BY THOS. MACLEAR, ESQ., F. R. A. S., e. Mars .... N.L. 22.300 12 18 36 9 41.34 • • • 29.964 69.6 68.8 Micrometer wire placed on limbs of planet Mars . . . . S L. 23.002 9 99.64 ! 29.962 69.6 68.9 while transiting, instead of on entering the Mars .... N.L. 22.376 9 43.33 field; then read off. Next on opposite Mirs .... S.L. 22.970 9 58.80 12 23 6 29.962 69.6 68.9 limb and reed off; scarcely time to do Mare .... N.L. 23.355 9 42.77 this properly. Mirs .... N.L 37.800 '. 1625.11 Screw always driven 4- . viz : in the order Mars .... S.L. 37.150 16 8.46 18 38 18 • • • 29.961 69.6 69.0 of increasing reading of screw-head. Mars .... N.L i 37.758 16 24.31 When the clock time is not t ntered there was 12 40 42 29.960 69 6 69.1 Mars .... S.L. 37.134 16 8.05 not time for noting it. It is generally use- Mars .... N.L 37.818 16 25.88 less for the measures, for the A. R. ver- 12 42 48 29.958 69.6 69.1 Mare .... S.L 37.178 16 9.46 nieis are sensibly in position, and the A. R. Mars .... N.L. 37.750 37.108 16 24.10 16 7.37 12 44 46 29.956 69.6 69.8 of .Mars can always be had to the nearest Miirs .... N.L. 37.845 37.210 16 26.58 16 10.03 12 47 16 29.955 69.6 69.2 conjunction with the time of transiting the meridian, or the A. R. of the star. Mars .... S.L. One revolution of micrometer = 26". 06925. After tenth measure turned the position circle verniers 180" to eliminate the coincidence of the wires. DECEMBER IT, is 1 ;i. Name. Micr. Arc equiv- alent. Hour circle. Clock. Bur. Thermometers. Remarks. Alt. Free. Rev. / /' h. m. s. h.m. f. Inches. • • Mare .... N.L. Mars . . . .S.L. 17.575 18.110 7 38.16 7 58.11 12 12 34 12 16 51 30.043 69 2 68.5 H. C. 11108 Power 273. Mare .... N.L. Mars .... S.L. 17.561 18.192 7 37.80 7 54. 45 12 19 45 12 22 0 . . . 30.040 69.0 68.4 ' Telescope west, and clamped in A. R. only. Mare .... N.L Mara .... S.L. Mars .... N.L. Mars .... S.L. Mars .... N.L Mire .... S.L. 17.565 18.144 17.615 18.084 17.532 18.120 7 37.90 7 53.00 7 39.21 7 51.43 7 37.04 7 52.37 12 24 15 12 27 4 12 29 11 12 31 9 12 33 56 12 36 2 30.038 30.096 30.030 68.8 68.6 68.4 68.3 68.3 68.2 Wire wilkin limb. Only limb observed at each clamping. Zero wire on preceding object : by moving telescope in declination. Fair definition. Mare .... S.L. Mars .... N.L. 37.900 38.454 16 28.01 16 42.46 12 49 8 12 51 50 30.030 68.3 68.3 Mare .... S.L 37.900 16 28.01 12 53 48 Mare .... N.L. 38.491 16 43.42 12 55 35 Mare .... S.L. 37.941 16 29.08 12 57 20 '. Mare .... N.L. 38.460 16 42.61 12 59 13 i Mirs .... S.L. 37.922 i 16 28.59 13 1 13 Mars .... N.L. 38.588 ! 16 45.95 13 4 0 Mars .... S.L. 37.951 j 16 29.34 Mara .... N L. 38.461 16 42.67 13 5 49 13 7 43 . . . 30.030 68.8 68.2 One revolution of micrometer 98". 06925. After tenth nipflmrp rorrrapit the position firrlf vernier*. 484 OPPOSITION OF MARS, 1849-50, IIKI-K.MHKII 18, 1840. Name. Micr. Arc equiv- alent. Hour circle Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. ' " il. 111. S. li. m. s. Inches. • • Mars . . . . N.L Mars . . . . S.L Man .... N.L. Mar. .... S.L. •.MM 4-2.291 42.'! 80 42.305 18 39.38 18 22.48 18 35 23 18 22.85 11 49 0 11 53 33 11 57 38 12 1 16 5 36 7 5 40 12 5 43 52 30.000 30.059 68.0 68.0 67.4 67.4 H. C. 11108. Power 273. Telescope west. Man .... N.L. Mar* .... S.L. Mara .... N.L. Mara .... S.L. 42.860 42.330 43.886 42.322 18 37.32 1823.50 18 38.00 18 23.29 12 4 32 12 8 0 12 12 8 12 15 33 5 47 7 5 50 34 5 54 43 5 58 6 30.056 30.054 67.8 67.6 67.2 67.1 Wire u-ithin limb. Planet north of star. Zero wire for planet ; micrometer on star. Mar N.L. Mar S.L. 42.970 42.346 18 40.18 18 23.92 12 19 28 12 22 48 623 6 5 12 30.050 67.5 66.9 Polar axis only clamped. Fair definition occasionally. Mara .... N.L. Mare .... S.L. 17.177 17.770 17.188 7 27.79 7 43.25 7 28.07 12 36 33 12 40 17 12 44 0 6 19 5 6 22 48 6 26 33 30.048 67.3 66.8 Man .... N.L. Mnra . . . . SL. 17.705 7 41.55 1 12 47 19 6 29 51 Mars .... N.L Mars . . . S.L. 17.145 17.660 7 26.95 7 40.38 12 51 3 12 55 1 6 33 35 6 37 31 30.046 67.2 66.8 Mara .... N.L. 17.205 7 28.52 ; 12 58 33 6 41 6 Mara .... S.L. 17.632 i 7 39.39 13 2 57 6 45 24 Man .... N.L. Mara .... S.L. 17.114 17.589 7 26.15 7 38.53 13 6 41 13 10 8 6 49 13 6 52 41 30.041 67.2 66.6 One revolution of micrometer = 26". 06925. After the tenth measure, reversed the position circle verniers. DECEMBER 3O, 1849. Thermometers. Micr. Arc equiv- Hour circle. Clock. Bar. alent. Name. Alt. Free. Remarks. ! i Rev. / // h. m. 8. h. m. s. Inches. • • Man .... N.L. 26.215 11 23.40 11 37 5 5 16 13 30.102 64.0 63.3 H. C. 10669. Mara .... S.L. 25.573 11 6.66 11 46 1 5 25 8 30.101 64.0 62.8 Power 273. Mara .... N.L. 26.265 11 24.70 11 55 46 53454 30 101 64.0 62.8 Telescope west. Man .... S.L. 25.576 : 11 6.74 12 3 44 5 42 50 30.101 64.0 62.7 Wire within limb. Mare .... N.L. Mars .... S.L. 33.8S9 34.370 14 43.15 14 55.99 12 15 45 12 24 48 5 54 49 6 3 53 30.104 30.106 63.8 63.6 62.6 62.4 Planet south of star. Polar axis only clamped. Mars .... N.L. Mars .... S.L. 33.770 34.362 14 40.35 14 55.78 12 34 29 12 43 28 6 13 32 6 22 30 30.108 30 109 63.3 63.0 62.0 62.0 Zero wire on star. Remarkably bad definition. One revolution of micrometer = 26". 08925. After the fourth measure, reversed the position circle verniers. DECEMBER 31, 1849. Micr. Arc equiv- alent. Name. Hour circle. Clock. Bar. Thermometers. Remarks. 1 AH. Free. Rev. ' " Inches. 0 • Mars .... N.L. 32.505 Mars .... S.L. XI. 050 Mare .... N.L. 32.450 Mars .... S.L. 33.054 14 7.38 14 21.59 14 5.95 14 21.69 12 31 44 12 37 35 12 45 7 12 52 14 692 6 15 54 6 22 24 6 23 30 30.149 30.149 30.148 30.145 62.0 62.0 62 0 62.0 61.4 61.4 61.4 61.4 II. C. 10669. Power 273. Telescope west. Wire vitkin limb. AT THE ROYAL OBSERVATORY, CAPE OF GOOD HOPE. 485 DECEMBER 91, 1849— Continued. Name. Micr. Art- equiv- illrnt. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / '/ li. ni. H. ll. III. 8. Inches. • • Mars .... N.L. Mars .... S.L. Mare .... N.I.. Mars .... S L. 27.609 27.012 27.685 27.037 11 59.85 11 44.18 12 1.73 11 44.63 12 2 0 12 8 4i 12 15 40 12 22 36 6 39 81 6 45 1 6 53 1 6 59 54 30.144 30.143 30.138 30.135 62.0 62.0 62.0 62.0 61.4 61.4 61.4 61.3 Zero on star. Polar axis only clamped. Kcin;i i k;tl'i\ good definition. Tin; commencement of the observations de- Itiyrd by visitors to the telescope. One revolution of micrometer = 26". 06925. After fourth measure reversed the position circle vernier.-*. I)K« KM15H{ 33, 1840. Thmnometers. \Tu-r Clock Bar. Name. . ah'iit. Alt. Free. Remarks. Rev. ; // ll. III. S. li. in. 8. | Inches. 1 • • Mara .... N.L. 28.696 J2 28.08 12 18 52 5 54 33 29.999 66.8 66.0 H. C. 10669. Mars .... S.L. 28.050 13 11.24 13 23 58 5 59 38 29.996 66.7 68.0 | Power 273. Mara . . . N.L. 28.664 19 28.92 12 29 19 6 4 58 29.994 66.6 66 0 Telescope west. Mars .... S.L. 28.120 12 12.60 12 34 1 6 9 44 29.993 66.4 65.8 Wire wilhin limb. Zero wire on star. M-irs .... N.L. 31.504 13 41.28 12 45 0 6 20 39 29.99-2 66.4 65.8 Mar S.L. 3-2.048 13 55.47 12 49 49 6 25 28 29.990 63.3 65.8 Very good definition. Mar» . N.L 31 4Sfi 19 40 03 12 54 47 6 30 26 29.988 66.3 65.6 The occultation of Saturn delayed the com- Mare .... S.L. 32.042 12 55.31 12 59 28 6 35 7 29.985 66.3 65.6 mencement. One revolution of micrometer = 26". 06925. After fourth measure reversed thn position circle verniers. DECEMBER 23, 1819. Name. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. All. Free. Rev. h. m. 8. ll. m. 8. Inches. • • H. C. . . . 10669 . 29.877 12 58.61 11 54 5 29.939 70.4 69.5 Power 273. Mare . . . N.L. . 30.603 13 17.80 Telescope west. t Micrometer wire within limb. H. C. . . . 10669 . Mara . . . S.L. . 29.934 31.182 13 0.36 13 32.89 11 57 S3 • 29.936 69.6 69.4 He.-id below, and used for both star and planet. Polar and declination axes clamped. Clouds prevented other observations. One revolution of micrometer = 96" 06925. 486 OPPOSITION OF MARS, 1849-50, DECEMBER 24, 18*9. Name. Micr. Bar. 30.000 28.746 27.584 26.322 Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. / // h. m. s. h. m. s. Indies. • 0 H. C 10669 13 2.08 12 29.39 11 59.09 11 26.19 . . . 6 25 8 6 27 0 6 32 45 6 34 30 6 37 0 6 38 0 30.102 63.8 63.4 6) 3.678 rev. = 0.613 rev. = 15". 98. One revolution of micrometer ~ 36". 05925. Mars compared with n. C 10669. The star became faint on the approach of the planet, and finally could not he distinguished. The several powers were tried in succession without avail. The above observations were made after the star escaped from the rays, and by repetition, using the " driving clock,'' as when measuring double stars. The measures are in declination between the star and the planet's c«Ur«. The star still too faint for good work. Power 161 employed. Planet's centre true south of star. DECEMBER 25, 18*9. Remarks. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers Remarks. Alt. Free. Rev. / // h. m. a. h. m. s. Inches. O • Mars . . . N.L. . H. C. . . . 10669 . S9.701 29.448 12 54.28 12 47.68 11 25 57 4 56 46 30.096 66.2 66.0 Mara . . . S.I,. . H. C. . . . 10669 . 30.236 29.415 13 8.3!! 12 46.82 11 38 13 500 Mars . . . N.L. . H. C. . . . 10669 . 29.692 29.408 12 54.04 12 46,64 11 31 25 5 3 32 Mara . . . S.L. . H. C. . . . 10669 . 30.230 29.392 13 7.80 12 46.22 11 34 3 5 4 50 Mara . . . N.L. . H. C. . . . 10669 . 29.612 29.382 12 51.96 12 45.96 11 36 32 5 7 20 Mars . . . S.L. . H. C. . . . 10669 . 30.206 29.360 13 7.44 12 45.39 11 38 53 5 9 43 Mare . . . N.L. . H. C. . . . 10669 . 29.658 29.414 12 53.15 12 46.79 11 41 24 5 12 14 * Mars . . . S.L. . H. C. . . . 10669 . 30.256 29.385 13 8.74 12 46.04 11 44 5 5 14 55 Mars . . . N.L. . H. C. . . . 10669 . 29.648 29.400 Vt 52.89 13 46.43 11 46 46 5 17 35 Mare . . . S.L. . H. O. . . . 10669 . 30.190 29.396 13 7.02 12 46.32 11 49 4 5 19 53 30.096 65.6 65.3 Mars . . . N.L. . H. C. . . . 10669 . Mam . . . S.L. . B.C. . . . 10669 . 29.604 29.360 30.200 29.335 12 51.75 12 45.39 13 7.28 12 44.73 11 56 32 11 59 0 5 27 20 5 29 47 30.096 65.5 1 65.2 Power 273. Telescope west of pier. Micrometer wire used for both objects. Wire u-ttMn limb. AT THE ROYAL OBSKRVATOKY, CAPE OF GOOD HOPE. 487 DECEMBER 25, 1 8*O_Contlnned. Name. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / // h. in. s. h. in. a. Inches. • • Mars . . . N L. . H C. . . . 10669 . 29.652 29.363 30.203 29.350 29.611 29.350 12 53.0fl 12 45.46 13 7.36 12 45.12 12 51.93 12 45.12 12 1 29 12 4 4 12 638 5 33 19 "5 34 51 5 37 24 65.3 65.0 Both axes clamped. Excellent definition until towards the end. Eight measures by repetition for diameter in declination after the other measures, and when the definition was failing, — 66". 635, the wire being without the limb. •: 8 '.329 — .47 =7". 86. Mars . . . SL. . H.C. . . . 10669 . Mars . . . N.L. . H. C. . . . 10669 . Mars . . S.L. . H. 0. . . . 10669 . Mars . . . N.L. . 30.520 29.355 29.620 29.382 30.240 29.394 13 7.80 12 45.26 12 52.16 12 45.96 13 8.33 12 46.27 12 9 17 12 11 53 12 14 29 5 40 5 5 42 40 5 45 16 • • 65.2 64.8 Thickness of wire =-. 0".94. H. C. . . . 10669 . Mara . . . S.L. . H. C. . . . 10669 . Mare . . . N.L. . II. C. . . . 10669 . 29.666 29.386 12 53.36 12 46.06 12 16 52 5 47 38 Mars . . . S.L. . H. C. . . . 10669 . 30.240 29.368 13 8.33 12 45.59 12 19 20 5 50 5 1 30.096 65.0 64.6 One revolution of micrometer = 26". 06925. DECEMBER 36, 1849. Name. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / 11 h. in. s. h. m. s. Inches. • ° Mars . . . NL. . H.C. . . . 10669 . 30.725 30.286 13 20.98 13 9.53 10 55 35 29.910 68.0 67.5 Power 273. Micrometer bead below. Mara . . . S.L. . 11. C. . . . 10669 . 31.246 39.250 13 34.56 13 8.59 11 1 24 4 30 40 Micrometer wire used for both objects. Telescope west, and both axes clamped. Mare . . . N.L. . H.U. . . . 10669 . 30.707 30.200 13 20.51 13 T.S9 11 5 39 4 34 55 Wire u'ilhin limb. Excellent definition. Mara . . . S.L. . H.C. . . . 10669 . 31.198 30.154 13 33.18 13 6.09 11 10 54 4 40 9 Mara . . . N.L. . H.C. . . . 10669 . 30.590 30.105 13 17.46 13 4.81 11 IS 15 4 44 30 29.910 67.8 67.4 Mara . . . S.L. . 11. C. . . . 10669 . 31.136 , 1331.43 30.103 13 4.76 11 19 53 4 49 9 Mare . . . N.L. . H.C. . . . 10669 . 30.534 30.096 13 16.00 13 4.69 11 24 18 4 53 33 29.906 67.6 67.2 Mart . . . S.L. . H. C. . . . 10669 . 31 090 30.045 13 30.50 13 3.25 11 28 39 4 57 53 Mara . . . N.L. . 11. C. . . . 10669 . 30.496 30.026 13 13.01 13 2.87 11 34 53 549 29.903 67.6 67.1 Mare . . . 8.L. . H. C. . . . 10669 . 31.057 29.972 13 29.6|B 13 1.35 11 41 36 5 10 50 29.900 67.5 67.0 488 OPPOSITION OF MARS, 1849-50, t DECEMBER 36, 1849— Continued. Name. Micr. Arc equiv- alent. Hour circle Clock. Bar. Thermometers. Remaiks. Alt. Free. Rev. / // Inches. • • Mars . . . N.L.- . H. C. . . . 1066? . 30.535 31.081 13 16.02 13 30.28 11 56 1 . . . 29.900 67.5 67.0 Instrurnmtal circumstances as stated on preceding p;tge. Mars f . . S.L. . II. C. . . . 10669 . 31.075 31.000 13 30.10 1328.15 11 58 44 Northwester. Clouds coming over. Mare . . . N.L. . H.C. . . . 10669 . 30.582 31.055 13 17.25 13 29.58 12 0 49 Definition sometimes very bad. Mars . . . S.L. . H. C. . . . 10669 . 31.086 31.025 13 30.39 13 28.80 13 3 38 Mars . . . N.L. . H. C. . . . 10669 . 30.533 i 13 15.97 31.070 13 29.97 12 4 16 Mars . . . RL. . H. C. . . . 10669 . 31.144 31.069 30.609 31.077 13 31.90 13 29.94 13 17.95 13 30.15 12 551 12 7 30 Mars . . . N.L. . H. C. . . . 10669 ' Mars . . . S.L. . H.C. . . . 10669 . 31.127 31.042 13 31.46 13 29.24 13 9 19 Mars . . . N.L. . H.C. . . . 10669 . 30.616 31.051 13 18.63 13 29.48 12 11 18 - Mars . . . S.L. . H. C. . . . 10669 . 31.199 31.100 • 13 33.33 13 30.75 12 1320 29.886 67.0 66.4 One revolution of micrometer = 26". 06925. DECEMBER 29, 1849. Name. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / // b. in. s. h. m. s. Inches. • - Mara . . . N.L. . H. C. . . . 10669 . 32.213 29.572 13 59.76 12 50.91 11 42 39 5 7 23 5 15 7 29.976 68.6 63.3 Power 873. Telescope west. Mara . . . S.L. . H. C. . . . 10669 . Mare . . . N.L. . H. C. . . . 10669 . 32.800 29.585 32.282 29.656 14 15.06 12 51.25 14 1.56 12 53.10 11 53 14 12 2 56 5 17 57 527.39 Both axes clamped. Wire within limb. Indifferent definition. Man . . . S.L. . H. C. . . . 10669 . 32.877 29.652 14 17.07 12 53.00 12 12 12 5 36.56 Mars . . . N.L. . B.C.. . . 10669 . 32.323 29.660 14 9.63 12 53.21 12 21 20 5 46 5 Mars . . . S.L. . 32.075 13 56.16 12 30 40 5 55 24 29.967 67.5 62.9 Clouds — overcast. One revolution of micrometer = 26". 06925. AT TIIE ROYAL OBSERVATORY, CAPE OF GOOD IIOPE. 489 DECEMBER 30, 1849. N;une. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / // h. in. s. h. m. B. inches. • e Mars . . . N.L. . 11. C. . . . 106C9 . 33.419 29.592 14 31^0 12 51.43 30.030 G9.6 • Overcast. JANUARY 7, 1850. Thermometers. Clock. Bar. alent. Name. Alt. Free. Remarks. Rev. , « h. in. s. h. m. s. Inches. •' B. A. C. . . . 1562 Mara . . N.L. '50.798 26 800 22 4.23 11 38 65 11 59 0 4 55 47 5 12 52 30.092 64.0 63.2 Power 273. B. A.C. . . . 1562 Mars .... S.L. 50.900 27.411 23 6.91 11 54.58 12 21 1 5 34 53 30.096 63.2 .62.8 Both axes clamped. Micrometer used for both liinba. • Good definition. B. A. C. . . . 1562 Mars .... N.L. 50.991 27.0Q8 22 9.28 11 44.07 12 41 0 5 55.32 30.097 63.2 02.8 Cloudy weather from the 30th ultimo, until this night. B. A. C. . . . 1562 Mars .... S.L. 51.128 27.745 22 12.85 12 3.29 13 2 6 6 15 58 30.092 63.2 62.8 Interval in the A. R. too great for a telescope with short clamping leverage to be trusted. One revolution of micrometer = 26". 06925. JANUARY 8, 1850. Name. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. AU. Free. Rev. i // h. m. a. h. m. s. Inches. • • * * 35.127 20.737 17 15.73 9- 0.60 11 34 2 4 37 15 4 47 0 30.036 67.8 67.4 Power 273. Micrometer wire used for both objects, and Mars .... N.L. . 35.156 21.367 17 15.49 9 17.02 11 50 3 4 53 16 532 Ecrcw-head below. Both axes clamped. Mars .... S.L. B. A. C. . . . 1562 Mars .... N.L. 42.684 21.012 18 14.91 13 29.24 12 15 39 5 12 30? S 28 36 30.037 67.5 67.1 Telescope west. Planet north of btar. B. A.C. . . . 1562 Mars .... g.L. 43.760 21.680 18 16:89 13 45.87 1236 23 S 33 8 5 49 21 30.045 67.2 66.8 Bad definition. B. A.C. . . . 1562 Mars .... N.L. 42.840 21.244 18 35.81 13 34.51 12 56 23 5 53 8 6 9 20 30.053 66.8 66.2 B. A. C. . . . 1562 Mars .... S.L. 43.000 21.960 18 40.98 13 53.17 13 16 22 6 13 9 6 29 18 30.056 66.8 66.8 One revolution of micrometer=26". 06925. • This is not B. A. C. 1562. 62 490 OPPOSITION OF MARS, 1849-50, JANUARY », 1850. Name. Micr. Arc equiv- alent. Hour circle. . Clock. Bar. Thermometers. Kemarks. Alt. Free. Rev. ' " Inches. » • B. A. C. . . . 1562 Mars' centre . . . 40.806 21.782 17 43.78 9 27.84 11 17 22 4 29 29 30.093 66.6 65.8 Power 273. Telescope west, anil Ijotll axes damped. B. A. C. . . . 1562 Mars' centre . . . 40.764 Lost. 17 42.69 11 40 4 4 36 49 30.006 66.6 65.8 Micrometer wire used for both objects. Planet north of star. B. A. C. . . . 1562 Mars' centre . . . 40.766 21.911 17 42.74 9 49.45 11 57 27 4 54 12 5 9 33 30 096 6C.4 65.8 Most wretchedly bad definition. B. A. C. . . . 1562 Mars' centre . . . 40.776 21.865 17 43.00 9 48.16 12 15 27 5 12 10 5 27 32 30.097 66.2 65.8 B. A. C. . . . 1562 Mars' centre . . . 40.910 21.968 17 46.49 • 9 50.85 larK 53 5 30.38 5 45.58 30.099 66.3 66.0 One revolution of micrometer = 26". 06925. JANUARY 1O, 1850. Thermometers. Micr. Arc equiv- Hour circle. Clock. Dar. alent. Name. Alt. Free. Remarks. Rev. / „ , B. A. C. . . . 1562 Mars' centre . . . 38.602 22.030 16 46.32 9 34.30 11 37 19 4 34 5 4 48 37 29.962 70.0 69,7 Power 273. Telescope west. B. A. C. . . . 1562 Mars' centre . . . 38.606 22.054 16 46.42 9 34.93 11 56 21 4 53 8 5 7 38 29.359 70.0 69.7 Micrometer win for both objects. Both axes clamped. B. A. C. . . . 1562 Mars' centre . . . 38 708 22.192 16 49.08 9 38.52 12 17 41 528 58 29.954 69.8 69.2 Remarkably bart definition. The planet a boiling mass of light. B. A. C. . . . 1562 38.738 16 49.86 Mars' centre . . ; 22.224 9 39.36 12 36 44 5 48 4 29.947 69.8 69.2 One revolution of micrometer = 26". 06925 JANUARY 11, 1850. Tlirrinometers. Name. Micr. Are equiv- alent. Hour circle. Clock. Bar. Remarks. Alt. Free. Rev. / 1! h. in. s. h. m. s. Inches. • • B. A. C. . . . 1563 Mars .... N.L. 38 010 23.706 16 30.88 10 17.99 11 58 20 4 55 8 5 8 53 29.872 73.0 72.4 Power 273. Telescope west. B. A. C. . . . 1562 Mars .... B.L. 38.122 24.250 16 33.80 10 32.17 12 17 S 5 27 32 29.874 73.0 72.0 Both axes clanip-jij. Micrometer wire for both objects. B. A. C. , . . 1562 Mars .... N.L. 38.121 23.886 16 33.78 10 22.68 12 35 20 5 45 52 29.8tJO 72.2 71.4 Screw-head below. The day lias been "burning" hot. B. A. C. . . . 1562 Mars . . . . S L. 38.211 24.490 16 36.12 10 38.43 12 52 42 6 3 14 29.884 72.0 71.4 One revolution of micrometer = 20". 06925. AT THE ROYAL OBSERVATORY, CAPE OF GOOD HOPE. 491 JANUARY IV, 1850. Name. Micr. Arc frjniv alenl. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / // Inches. • • B. A. C. . . . 1562 Mars .... N.L. D. A. C. . . . 1563 Mats .... S.L. 33.409 21.627 33.430 22.090 33.392 21.685 33.530 22.265 14 30.95 9 23.80 14 31.49 9 35.87 14 30.50 9 25.31 14 34.10 9 40.43 12 11 46 19 27 44 12 44 9 13 0 17 5 8 31 5 21 36 5 37 35 5 53 59 6 10 9 30.054 30.056 30.056 30.056 C5.0 65.0 65.0 65.0 64.6 64. 6 64.6 64.6 Power 273. Telescope west. Both axes clnmjinl. Micrometer wire for both objects. Good definition. B. A. C. . . . 15C2 Mars .... N.L. B. A. C. . . . 1563 Mara .... S.L. JANUARY 14, 1850. Name. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. Eev. i n It. m. s. h. tn. s. Inches. • • B. A C. . 1562 33 416 26.430 14 31.13 11 28.21 11 47 56 4 44 48 4 56 42 29.977 69.0 68.5 Power 273. Telescope west. Mars .... N.L. B. A.C. . . . 1562 Mars .... S.L. 33.405 26.915 14 30.84 11 41.65 12 2 6 5 10 51 29.960 69.0 68.4 . Both axes clamped. Micrometer head below, and the wire used B. A C. . . . 1502 Mars .... N.L. 33.366 26.449 14 30.35 11 28.71 12 18 12 5 27 0 29.988 69.0 68.4 fur both objects. Wire uitkin limb, as usual, when the limb was observed. B. A. C. . . . I.",C2 Mars . . . .S.L. 33.410 26.075 14 31.70 11 43.22 12 32 33 5 41 17 S9.990 69.0 68.4 Both objects occasionally steady. B. A. C. . . . 1563 Mars .... N.L. 33.408 26.521 14 30.92 11 31 38 12 47 42 5 56 29 29.990 68.8 68.2 Hazy weather at the beginning. B. A. C. . . . 1562 Mars .... S.L. 33.486 27.078 14 32.85 11 45.90 13 1 52 6 10 38 29.988 68.8 68.0 JANUARY 15, 1850. Name. Micr. Arc equiv- alent. Hourcircle. Clock. Bar. Thermometers. Remarks. An. Free. Eev. / // Inehefii 0 ' B. A. C. . . . 1562 M.irj . . . . N L. D. A. C. . . . 15C2 Mars .... S.L. B. A. C. . . . 1 .v;-! Mars .... N.I, B. A. C. . . . 1562 Mar.< .... S.L. 33.060 28.455 33.076 28.909 33.072 28.585 33.2S5 29.172 14 21.84 12 21.79 14 23.26 12 35.63 14 22J5 1125.18 14 27.71 12 40.48 H 25 36. 11 40 11 11 55 3 12 9 0 4 33 49 4 37 4 4 48 25 4 51 Mi 5 3 19 5 5 55 5 17 15 30.038" 30.039 30.042 30.014 70.6 70.5 70.2 70.0 69.6 69.4 69.2 69.0 Power 273. Oilier instrumental circumstances as before. Occasionally the images very bad. 492 OPPOSITION OF MARS, 1849-50, JANUARY 15, 1850— Continued. Name. Micr. Arc equiv- alent. Hour circle. Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / // h. m. s. !i. m. s. Inches. • • B. A. 0. . . . 1562 Mars .... N.L. D A. C. . . . 1563 33.335 28.813 33.406 39.350 14 29.01 12 31.13 14 30.86 12 45.12 12 22 56 12 36 56 5 19 51 5 31 12 5 33 51 5 45 9 30.045 30.045 70.0 69.4 09.0 68.5 Mars . . . . SL. JANUARY 1C, 1850. Name. Micr. Arc equiv- alent. Hourcirclc. Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / // h. m. s. h. m. s. Inches. • ° B. A. C. . . . 1562 Mars .... N.L 32.783 30.515 14 14.62 13 15.49 12 2 3 4 5856 5 9 47 30.010 70.8 69.6 Power £73. Instrumental circumstances as before. B. A. C. . . . 1562 Mars .... S.L. 32.818 31.030 14 15.53 1328.92 12 15 7 5 11 58 5 22 52 30.012 70.7 69.5 Good definition. B. A. C. . . . 1562 Mars .... N.L. 32.782 30.563 14 14.59 13 16.75 1228 2 524 54 5 35 46 30.014 70.6 69.4 B. A. C. . . . 156S Mars .... S.L. 32.815 31.118 14 15.45 13 31.22 12 40 55 & 37 47 5 48 39 30.015 70.4 09.3 B. A. C. . . . 1562 Mars .... S.L. 32.894 31.171 32.930 30.753 14 17.51 13 32.60 14 18.45 13 21.70 12 54 21 13 835 5 51 15 616 6 5 26 6 16 18 30.016 30.016 70.2 70.0 69.0 68.8 . B. A. C. . , . 1562 Mars .... N.L. JANUARY 17, 1850. Name. Micr. Arc equiv- alent. Hour circle Clock. Bar. Thermometers. Remarks. Alt. Free. Rev. / /; h. m. s. h. m. s. Inches. « i B. A. C. . . . 1562 Mars .... N.L. 32.145 32.013 13 57.99 13 54.55 11 16 56 4 13 39 4 24 9 29.960 72.5 71.5 Power 273. Telescope west. B.A. C. . . . 1562 Mars .... S.L. 32.069 32.559 13 56.53 14 8.79 11 29 17 4 26 0 4 36 33 29.958 72.5 71.4 Other instrumental circumstances as here- tofore. B.A. C. . . . 1562 Mars' centre . . . 32.048 32.250 13 55.46 14 0.73 11 43 16 4 40 1 4 50 31 29.959 72.4 71.4 Occasionally a good definition. B.A.C. . . . 1502 Mars .... N.L. 31.5C2 31.502 1341.23 13 41.23 12 13 43 5 10 28 5 20 57 29.961 72.2 71.2 After the sixth measure, the instrument was turned oft* to observe the occul- B. A. C. . . . 1502 Mars .... S.L. 31.560 32.014 13 42.48 13 54.58 1227 1 S23 45 5 34 20 29.963 72.2 71.2 tation of <(> Aquarii, and the centre of Mars was observed at tile third oli-.'rva- B. A.C. . . . 1562 Mars .... N.L. 31.548 31.600 13 42.17 13 43.79 12 40 46 5 3731 5 48 2 29.964 72.1 71.1 tion to gain time for the purpose. After the occuUation, the observations pro- ceeded. B.A.C. . . . 1562 Miir» .... S.L. 31.556 32.076 13 42.38 13 56.20 12 53 30 5 50 16 6 1 45 29.906 72.0 71.0 RETURN TO the circulation desk of any University of California Library or to the NORTHERN REGIONAL LIBRARY FACILITY Bldg. 400, Richmond Field Station University of California Richmond, CA 94804-4698 ALL BOOKS MAY BE RECALLED AFTER 7 DAYS 2-month loans may be renewed by calling (510)642-6753 1-year loans may be recharged by bringing books to NRLF Renewals and recharges may be made 4 days prior to due date DUE AS STAMPED BELOW FEB 0 6 1995 \c d> 20.000 (4/94) I ~* I " — > •Mi