UNIVERSITY OF B.C LIBRARY 3 9424 00126 2580 SIOHAGE ITEU PROCESS IHG-Olst ^ crc ^^ f I ^r ^- ^c4C < C(^<. 'C. ^. Cakveth & Co. MfD.CAL Booksellers 413 PARLIAMENT ST Toronto • . . r,... f ccr .^^^^ -^ <:, or carry it away. After all, tlie prize is nothing more than an ornamental flag ; but it is presented W the governor of Rome, and it is supposed to be a pledge of the speed and value of the horse which "will descend as an heir-loom from o-eneration to generation among the peasantry, to "whom many of these hoT'ses belong. The decision of such a race, however, can have little to do A\-ith the speed or streng-th or value of the horses in any respect. The Italians, lio"wever, enter into the affair "with all their characteristic eager- ness of feeling, and are guilty of every kind of extravagance. During the first six days of the carnival, the horses are fairly classed according to the ao-o, height, degree of breeding, &c. ; but on the last two days — the choice days — they run altogether, and some in the manner that I have described, and thus increase the confusion, the riot, and the danger of the exliibition. The Corso is very nearly a mile, and it has occasionally been run in two minutes and twenty-one seconds : a very quick pace for small horses, many of them not more than fourteen hands high. Races of a similar character take place at Florence, of wliich. IMrs. Piozzi gives the following description : — ' The street is covered "with saw-dust, and made fast at both ends. ISTear the starting-post are elegant booths, lined "with red velvet, for tlie coui-t and first nobility. At the other end a piece of tapestry is hunfj, to prevent the creatures from dashing their braius out when they reach, the goal. Thousands and tens of thousands of people on foot fill tbe coui'se, so that it is a gi-eat wonder to me still that numbers are not killed. The prizes are exhibited to "view in quite the old classical style — a piece of crimson damask for the winner ; a small silver basin and ewer for the second ; and so on, lea"ving no performer unrewarded. ' At last come out the horses, "without riders, but with a narrow leathern strap hung across their bodies, which has a lump of ivory fixed to the end of it, all set full of sharp spikes like a hedgehog, and this goads them along while galloping, worse than any spur could do, because the faster they run the more this old machine keeps jumping up and do"WTi, and pricking their sides ridiculously enough ; and it makes one laugh to see that some of them are so tickled by it as not to run at all, but set about plunging in order to rid themselves of the inconvenience, instead of didving forward to divert the mob, who leap, and caper, and shout with dehght, and lash the laggers along "with great indignation indeed, and "with the most comical gestures.' Before we quit the neighboui^hood of Italy, we may perhaps notice another curious mode of horse-racing, practised in Malta. The horses here are indeed mounted, but they have neither saddle nor bridle. The riders sit on the bare back, and have nothing to guide or to spur on their horses, but a small pointed instrument, not unlike a cobbler's awl. These horses are small barbs, well tempered, or they would resist this mode of management, and they certainly are not swift. By pricking the horse on one side or the other of the neck, the rider can guide him a little in the way he should go, and certainly he may urge him to his fullest speed ; but still, although it affords a novel and amusing sight to the stranger, the horse and the spectators are degraded by such an exhibition. THE AUSTEIAN HORSE. The follo"wing account is given by the Duke of Ragusa of the impenal establishment for the breeding of horses at Mesohagyes, near Carlsburg, in Austria : — ' This is the finest establishment in the Austrian monarchy for the breeding and improvement of horses. It stands on 40,000 acres of 4S FOREIGN BREEDS OF HORSES. land of tlie best quality, and is surrounded in its whole extent, which ia 15 leagues, by a broad and deep ditch, and by a broad plantation 60 feet wide. It was formerly designed to supply horses to recruit the cavalry ; at present its object is to obtain stallions of a good breed, which are sent to certain depots for the supply of the various provinces. To produce these, 1,000 brood mares and 48 stallions are kept ; 200 additional mares, and 600 oxen are employed in cultivating the ground. The plain is divided into four equal parts, and each of these subdivided into portions, resembling so many farms. At the age of foui* years the young horses are all collected in the centre of the establishment. A selection is first made of the best animals to supply the deficiencies in the establishment, in order always to keep it on the same footing. A second selection is then made for the use of the other : none of these, however, are sent away until they are five years old ; but the horses that are not of suflScient value to be selected are sold by auction, or sent to the army to remount the cavalry, as circumstances may require. ' The whole number of horses at present here, including the stallions, brood-mares, colts, and fillies, is 3,000. The persons employed in the cultivation of the ground, the care of the animals, and the management of the establishment generally, are a major-director, 12 subaltern officers, and 1,170 soldiers. ' The Imperial treasury advances to the establishment every year 118,00to about three pounds of our present money. Five pence made one shilling : the actual value of these coins, however, strangely varied in different times and circum- stances. In the laws of Howell Dha, Howell the Good, Prince of Wales, enacted a little before this time, there are some carious particulars respecting the value and sale of horses. The value of a foal not fourteen days old is fixed at four pence ; at one year and a day it is estimated at forty-eight pence ; and at three years, sixty pence. It was then to be tamed with the bridle, and brought up either as a palfrey or a serving horse, when its value became one hundred and twenty pence. That of a ivild or unbroken mare was sixty pence. Even in those early days, the frauds of dealers were too notorious, and the following singular regnlations were established. The buyer was allowed time to ascertain whether the horse was free from three diseases. He had 56 HISrORY OF THE ENGLISH HORSE. three nights to prove him for the staggers ; three months to prove the soundness of his lungs ; and one year to ascei-tain whether he was infected with glanders. For every blemish discovered after the purchase, one-third of the money was to be returned, except it should be a blemish of the ears or tail, which it was supposed to be his own fault if the purchaser did not discover. The seller also warranted that the horse would not tire when on a journey with others, or refuse his food from hard work, and that he would carry a load or draw a carriage up or down hill, and not be resty. The practice of letting horses for hire then existed ; and then, as now, the services of the poor hack were too brutally exacted. The benevolent Howell disdains not to legislate for the protection of tliis abused and valuable servant. ' Whoever shall borrow a horse, and rub the hair so as to gall the back, shall pay four pence ; if the skin is forced into the flesh, eight pence ; if the flesh be forced to the bone, sixteen pence.' If a person lamed a horse, he was to forfeit the value of the animal ; and if he was supposed to have killed a horse, he was to purge himself by the oaths of twenty- four compurgators. Then, as now, it would appear that sorae young men were a Uttle too fond of unwarrantable mischief, or perhaps there were thieves in the country, even so soon after Alfred's days, showing also the estimation in which this portion of the animal was held, and the manner in which the hair was sufiered to grow, for it was decreed that he who cut ofi" the hair from a horse's tail was to maintain him until it was grown again, and in the mean time to furnish the o^vner with another horse. If the tail was cut off with the hair, the miscreant who inflicted the outrage was mulcted in the value of the animal, and the horse was deemed unfit for future service. Athelstan seems to have placed considerable value on some of his horses ; for he bequeaths, in his will, the horses given him by Thurbrand, and the white horses presented to him by Lisbrand. These are apparently Saxon names, but the memoiy of them is now lost. With William the Conqueror came a marked improvement in the British horse. To his superiority in cavalry this prince was chiefly indebted for the victory of Hastings. The favourite charger of William was a Spaniard. His followers, both the barons and the common soldiers, principally came from a country in wliicli agriculture had made more rapid progress than in England. A very considerable portion of the kingdom was divided among these men ; and it cannot be doubted that, however unjust was the usurpation of the Norman, England benefited in its husbandry, and par- ticularly in its horses, by the change of masters. Some of the barons, and particularly Roger de Boulogne, earl of Shrewsbury, introduced the Spanish horse on their newly- acquired estates. The historians of these times, however — principally monks, and knowing nothing about horses — give us very Httle information on the subject. The Spanish horse was then highly and deservedly valued for his stately figure and noble action, and was in much request in the tilts and tourna- ments that were then in fashion. The Spanish horse was the war-horse of every one who could afibrd to purchase and properly accoutre so noble an animal. The courage and the skill of the rider were most perfectly displayed when united -with the strength and activity, and spirit and beauty, of the steed. One circumstance deserves to be remarked, namely, that in none of the earhest historical records of the Anglo-Saxons or the Welsh is there any allusion to the use of the horse for the plough. Until a comparatively recent period, oxen alone were employed in England, as in other countries, for this purpose ; but about this period — tbe latter part of the tenth century — some innovation on this point was commencing, and a Welsh HISTORY OF THE ENGLISH HOESE. 57 law forbade the farmer to plough with horses, mares, or cows, but with oxen alone. On one of the pieces of the Bayeux tapestry woven in the time of William the Conqueror (a.d. 1066), there is the figure of a man driving a horse attached to a harrow. This is the earliest notice that we have of the use of this animal in field-labour. Ir. the reign of Henry I. (a.d. 1121), the first Arabian horse, or at least the first on record, was introduced. Alexander I., king of Scotland, presented to the church of St. Andrew's an Arabian horse, "wdth costly furniture, Turkish armour, many valuable trinkets, and a considerable estate. There have been some pretensions to the existence of a breed derived from or improved by this horse, but no certain proof of it can be adduced. In the reign of Henry II. several foreign horses were imported, but of what kind is not mentioned. Maddox speaks of ' the increased allowance that was made for the subsistence of the King's horses that were lately brought from beyond sea.' Smithfield is also now first spoken of as a horse-market, a field for tournaments, and a race-course. Fitzstephen, who lived at that time, gives the folloAving animated account of the scene : — ' Without one of the gates of the city is a certain field, plain or smooth, both in name and situation. Every Fi'iday, except some festival intervene, there is a fine sight of horses brought to be sold. Many come out of the city to buy or look on — to wit, earls, barons, knights, and citizens. It is a pleasant thing to behold the horses there, all gay and sleek, moving up and down, some on the amlle and some on the trot, which latter pace, although rougher to the rider, is better suited to men who bear arms. Here also are colts, yet ignorant of the bridle, who prance and bound, and give early signs of spirit and courage. Here also are managed or war-horses, of elegant shape, full of (ire, and giving every proof of a generous and noble temper. Horses also for the cart, dray, and plough, are to be found here ; mares, big with foal, and others ■svith their colts wantonly running by theii' sides. ' Every Sunday in Lent, after dinner, a company of young men ride out into the fields, on horses that are fit for war, and excellent for their speed. Every one among them is taught to run the rounds v^ith his horse. The citizens' sons issue out through the gates by troops, furnished with lances and shields. The younger sort have their pikes not headed with iron; and they make representation of battle, and exercise a skirmish. To this per- formance many courtiers resort, when the court is near ; and young sti-iplings, yet uninitiated in arms, from the families of barons and great persons to train and practise. ' They begin by dividing themselves into troops. Some labour to out- strip their leaders, without being able to reach them ; others unhorse their antagonists, yet are not able to get beyond them. A race is to be run by this sort of horses, and perhaps by others, which also in their kind are strong and fleet, a shout is immediately raised, and the common horses are ordered to withdraw out of the way. Three jockeys, or sometimes only two, as the match is made, prepare themselves for the contest. The horses on their part are not vnthout emulation : they tremble and are im- patient, and are continually in motion. At last, the signal once given, they start, devour the course, and hurry along -with unremitting SAviftness. The jockeys, inspired with the thought of applause and the hope of victory, clap spurs to their wilHng horses, brandish their whips, and cheer them with their cries.' This animated description reminds us of the more lengthened races of the present day, and proves the blood of the English horse, even before the Eastern breed was tried. Close on this followed the Crusades. The champions of the Cross 68 HISTORY OF THE ENGLISH HORSE. certainly liad it in their power to enrich their native country with some of the choicest specimens of the Eastern horse, but they were completely under the influence of superstition and fanaticism, and conunon sense and usefulness were forgotten. An old metrical romance, however, records the excellence of two horses belonging to Richard Coeur de Lion, which he purchased at Cyprus, and were, therefore, probably of Eastern origin : — Yn this worlde they hadde no pere, Dromedary nor destrere, Stede, Rabyte, ne Cammele, Goeth none so swifte, without fayle: For a thousand pownd of golde, Ke should the one be solde. The head of the war-steed was ornamented with a crest, and together with his chest and flanks, was wholly or partially protected. Sometimes he was clad in complete steel, with the arms of his master engraved or embossed on his hardings. The bridle of the horse was always as splendid as the circumstances of the knight allowed, and thus a horse was often called brigliadore, from briglia d'oro, a bridle of gold. Bells were a very favourite addition to the equipment of the horse. The old troubadour, Arnold of Marston, says that ' nothing is so proper to inspire confidence in a knight and terror in an enemy.' The price of horses at this period was singularly uncertain. In 1185, fifteen breeding mares sold for two pounds twelve shillings and sixpence, They were purchased by the monarch, and distributed among his tenants ; and in order to get something by the bargain, he charged them the great sum of four shillings each. Twenty years afterwards, ten capital horses brought no less than twenty pounds each ; and twelve years later, a pair of horses were imported from Lombardy, for which the extravagant price of thirty-eight pounds thirteen shillings and fourpence was given. The usual price of good handsome horses was ten pounds, and the hire of a cai or cart with two horses was tenpence a-day. To King John, hateful as he was in all other respects, we are mtich indebted for the attention which he paid to agriculture generally, and particularly to the improvement of the breed of horses. He imported one hundred chosen stallions of the Flanders breed, and thus mainly contributed to prepare our noble species of draught-horses, as unrivalled in their way as the horses of the turf. John accumulated a very numerous and valuable stud. He was eager to possess himself of every horse of more than usual power ; and at all times glady received from the tenants of the crown, horses of a superior quality instead of money for the renewal of grants, or the payment of for- feitures belonging to the crown. It was his pride to render his cavalry, and the horses for the tournament and for pleasure, as perfect as he could. It was not to be expected that so haughty and overbearing a tyrant would concern himself much with the inferior kinds ; yet while the superior kinds ffere rapidly becoming more valuable, the others would, in an indirect manner, partake of the improvement. One hundred years afterwards, Edward II. purchased thirty Lombardy war-horses, and twelve heavy di'aught-horses. Lombardy, Italy, and Spain were the countries whence the greater part of Europe was then suppHed with the most valuable cavalry or parade horses. Those for agricultural purposes were chiefly procured from Flanders. Edward III. devoted one thousand marks to the purchase of fifty Spanish horses ; and of such importance did he consider this addition to the English, or rather, mingled blood then existing, that formal appHcation was made HISTORY OF THE ENGLISH HORSE. 59 to the kiugs of France and Spain to grant safe conduct to the troop. When they had safely arrived at the royal stud, it was computed that they had cost the monarch no less than thirteen pounds six shillings and eight- pence per horse, equal in value to one hundred and sixty pounds of our present money. These horses were bought in order to enable him successfully to prose- cute a war against Scotland, and to prepare for a splendid tournament which he was about to ho-ld. Entire horses were alone used for this mimic contest, and generally so in the duties and dangers of the field. It was rarely the custom to castrate the colts ; and the introduction of the female among so many perfect horses might occasionally be productive of coniusion. The mare was at this period comparatively despised. It was deemed disgi-acefiil for any one above the common rank to ride her, and she was employed only in the most servile offices. This feeling and practice was then prevalent in every part of the world. When, however, it began to be the custom to castrate the young horses, the worth and value of the mare was soon appreciated ; and it is now acknowledged that usually she is not much, if at all, inferior to the perfect horse in many respects, while she has far more strength, proportionate courage, and endurance than the gelding. This monarch had many running-horses. The precise meaning of the term is not, however, clear. They might be light and speedy animals in opposition to those destined for the cavalry service, or horses that were hterally used for the purpose of racing. The average price of these running-horses was twenty marks, or thirteen pounds six shillings and eightpence. Edward was devoted to the sports of the turf and the field, or he began to see the propriety of crossing our stately and heavy breed with those of a lighter structure and greater speed. There was, however, one impedi- ment to this, which was not for a very long period removed. The soldier was cased in heavy armour, and the knight, with all his accoutrements, often rode more than twenty-five stones. No little bulk and strength were required in the animal destined to carry this back-breaking weight. When the musket was substituted for the cross-bow and battle-axe, and this iron defence, cumbrous to the wearer and destructive to the horse, became useless, and was laid aside, the improvement of the British horse in reahty commenced. While Edward was thus eager to avail himself of foreign blood, he, with the too frequent selfishness of the sportsman, would let no neighbour share in the advantage. The exportation of horses was forbidden under heavy penalties. One case in which he relaxed from his severity is recorded. He permitted a German merchant to re-export some Flanders horses which he had brought on speculation ; but he strictly forbade him to send them to Scotland. Nay, so jealous were these sister-kingdoms of each other's prosperity, that so late as the time of Ehzabeth, it was deemed felony to export horses from England to Scotland. The English horse was advancing, although slowly, to an equality with, or even superiority over, those of neighbouring countries. His value began to be more generally and highly estimated, and his price rapidly increased — so much so, that the breeders and the dealers, then, as now, skiifal in imposing on the inexperienced, obtained from many of the young grandees enormous prices for their cattle. This evil increased to such an extent, that Richard H. (1386) interfered to regulate and determine the price. The proclamation which he issued is interesting, not only as proving the increased value of the horse, but showing what were, four hundred and seventy years ago, the chief breeding districts, as they still 60 HISTOKY OF THE ENGLISH HORSE. contimie to be. It was ordered to be published in the counties of Lincoln and Cambridge, and the East and North Ridings of Yorkshire ; and the price of the horse was restricted to that which had been determined by former monarchs. A more enlightened policy has at length banished all such absurd interferences ■svith agriculture and commerce. We can now collect but little of the history of the horse until the reign of Henry VII., at the close of the fifteenth century. He continued to prohibit the exportation of staUions, but allowed that of mares when more tlian two years old ; and under the value of six shillings and eightpence. This regulation was, however, easily evaded ; for if a mare could be found worth more than six shillings and eightpence, she might be freely exported on the payment of that sum. The intention of this was to put an end to the exportation of perfect horses ; for it is recited in the preamble ' that not only a smaller number of good horses were left "within the realm for the defence thereof, but also that great and good plenty of the same were in parts beyond the sea, which in times past were wont to be within this land, whereby the price of horses was greatly enhanced,' &c. The exception of the mare, and the small sum for which she might be exported, shows the unjust contempt in which she was held. Another act of the same monarch, however unwillingly on his part, restored her to her proper rank among her kind. It had been the custom to keep large herds of horses in the pastures and common fields, and when the harvest was gathered in, the cattle of a great many owners fed promiscuously together. The consequence of this was that the progeny presented a strange admixture, and there was often a great deterioration of the favourite and best breed. On this account an act was passed prohibiting stalhons from being turned out into any common pasture. This, at no great distance of time, necessarily led to the castrating of all but a very few of the best stalhons, and then, on comparing the powers and work of the mare with that of the gelding, she soon began to be accounted more valuable — more service was exacted from her — she was taken more care of, and the general breed of horses was materially improved. Polydore Virgil, who flourished in this reign, confirms the statements already made, that ' the Enghsh horses were seldom accustomed to trot, but excelled in the softer pace of the amhle.' Henry VII. was an arbitrary monarch, and seemed to be too fond of prohibitory acts of parliament ; but so far as the horse was concerned they were most of them politic, although tjTannical. Succeeding monarchs acted on the same principle, and by prohibiting exportation, and encouraging a numerous and good breed of horses, by public rewards and recompenses, every necessary incitement was afforded i-apidly to improve the breed. Henry VIII., a tyi'annical and cruel prince, but fond of show and splendour, was very anxious to produce a valuable breed of horses ; and the means which he adopted were perfectly in unison with his arbitrary disposition, although certainly calculated to efiect his object. He aflSxed a certain standard, below which no horse should be kept. The lowest height for the stalKon was fifteen hands, and for the mare thirteen hands. Those whose local interests were injured loudly complained of this arbitrary proceeding. The small breed of Cornish horses was in a manner extinguished. The dwarfish but active and useful inhabitants of the "Welsh mountains rapidly diminished, the Exmoors and the Dartmoors Avere compelled to add an inch to their stature, and a more uniformly Btout and useful breed of horses was produced. The monarch was determined to effect and to secure his object. At HISTORY OF THE ENGLISH HORSE. ei ' Micliaelmastide' the neiglibouinng magistrates were ordered to 'drive' alj forests and commons, and not only destroy such stalhons, but all ' unlikely tits,' whether mares, or geldings, or foals, which they might deem not calculated to produce a valuable breed. He next had recoiu'se to a sumptuary law in order more fully to acconi- pHsh his object ; and, appealing to the pride of those who were concerned, he had no difficulty in this matter. Every archbishop and duke was compelled, under certain penalties, to keep seven trotting stallions for the saddle, each of which was to be foui-teen hands high at the age of three years. There were very minute directions with regard to the number of the fiame kind of horses to be kept by the other ranks of the clergy and nobi- Hty, and the statute concludes by enacting, that every person having benefices to the amount of one hundred pounds yearly, and ' every lajnnan, whose wife shall wear any French hood or bonnet of velvet,' shall keep one such trotting stalHon for the saddle. These enactments, tyrannical as they appear to us, were quietly sub- mitted to in those days, and produced the kind of horse which was then alone comparatively useful, and whose strength and noble bearing and good action were tiie foundation of something better in after days. The civil dissensions were at an end, there was no fear of foreign invasions — no numerous cavalry were needed — the labours of agriculture were performed chiefly by oxen, or by the smaller and inferior breeds of horses — races were not estabhshed — the chase had not begun to be pui'sued vnth. the ardour and speed of modern days — nothing, in fact, was now wanted or sought for, but an animal more for occasional exhibition than for sterling use, or if useful, pi-incipally or solely with reference to the heavy carriages and bad roads and tedious travelling through the country. If this is rightly considered, it will be acknowledged that, Avith all his faults, and with the confession that he was ever more actuated by the determinations of his own ungovernable passions than the advantage of his people or of posterity, we still owe him thanks for the preservation of that breed of horses from wliich in after times sprung those that were the glory of our country and the envy of every other. The following extract from a manuscript dated 1512, in the tliird year of the reign of Henry VIII., and entitled the Regulations and EstabHsh- ment of the Household of Algernon Percy, the fifth Earl of Northumber- land, may give the reader a sufficient knowledge of the different kinds of horses then in use. 'This is the ordre of the chequirroul of the nombre of all the horsys of my lordis and my ladys that are apoynted to be in the charge of the hous yerely, as to say, gentil hors [one of the superior breed, in distinction from the ordinary race — the same term is at present applied to Itahan horses of the best breeds] ; palfreys [smaller horses of an inferior breed, — the best of them, distinguished for their gentleness, and pleasant paces, were set apart for the females of the family : — " The bard that tells of palfried dames." Others of inferior value were ridden by the domestics or servants of every kind. Thus Dryden says, The smiths and armourers on palfreys ride.] Hobys [strong and active horses of rather small size, and said to have been originally of Irish extraction. Thus Davies, in his account of Ireland, says: — "For twenty hohhlers armed — Irish horse-soldiers — so called because they served on hobbies; they had &d. per diem"] ; naggis, [or nags, so called from their supposed propensity to neigh, hiegga. They (12 HISTORY CF THE ENGLISH HORSE. were small, and not mucli valued, but active liorses : — "Thy nags," says Prior, The leanest things alive, So very hard thou lov'st to drive.] Cloth-sek hers, [that carried the cloak-bag.] ; male-hors, [or mail, was equivalent to portmanteau. Thus, in Chaucer, " I have relics and pardona in my «wiZe."] First, gentil-hors, to stand in my lordis stable, six. Item. Palfreys of my lady's, to wit, one for my lady, and two for her gentil- women, and oone for her chamberer. Four hobys and naggis for my lordis oone saddill, viz. oone for my lorde to ride, oone to lede for my lorde, and oone to stay at home for my lorde. Item. Chariot hors to stond in my lorde's stable yerely. Seven great trottynge hors to draw in the chariott [or car ; was the vehicle in various forms, but far inferior to the chariot or coach in common use, in which the farniture or moveables were conveyed, or, perchance, the inferior females of the family. The lord and the lady usually rode on horseback. They were slow-paced, heavy horses, perhaps not much unlike the carriage-horses a century ago, which ploughed all the week, and took the family to church on Sunday. It must not be forgotten, as marking the character of the vehicle and its contents, that the chariot-man, or coachman, rode by the side of the horses, and so conducted them and the carriage], and a nagg for the chariott-man to ride ; eight. Again, hors for lorde Percy, his lordship's son and heir. A grete doble trottynge horse [a large and broad-backed horse, the depression along whose back gives almost the appearance of two horses joined together. Thus the French speak of le double bidet ; and Virgil, referring to the horse, says, "At duplex agiturper lumbos spina"] for my lorde Percy to travel on in winter. Item. A grete doble trottynge hors, called a curtal, [one with a docked tail. Thus, Ben Jonson : — " Hold my stirrup, my one lacquey, and look to my curtal the other,"] for his lordship to ride on out of townes. Another trottynge gambaldynge [gambald was the old word for gambol, and it means a horse that was fond of playing and prancing about] hors, for his lordship to ride upon when he comes into townes. An ambling hors for his lordship to journey on dayly. A proper amblyng little nagg for his lordship when he goeth on hunting or hawking. A gret amblynge gelding or trottynge gelding to carry his male.' — Berenger on Horsemanship. Sir Thomas Chaloner, who wrote in the early part of the reign of Elizabeth, and whose praise of the departed monarch may be supposed to be sincere, speaks in the highest terms of his labour to introduce into his kingdom every variety of breed, and his selection of the finest animals which Turkey, or Naples, or Spain, or Flanders could produce. Sir Thomas was now ambassador at the court of Spain, and had an oppor- tunity of seeing the valuable horses which that country could produce ; and he says that ' England could furnish more beautiful and useful breeds than any which foreign kingdoms could supply.' The fact was, that except for Dageantry or war, and the slow travelling of those times, there was no motive to cultivate any new or valuable breed. The most powerful stimu- lus had not yet been applied. Berenger, who would be good authority in such a case, provided expe- rienced and skilful persons to preside in his stables, and to spread by these means the rules and elements of horsemanship through the nation. He invited two Italians, pupils of PignatelH the riding master of Naples, and placed them in his service ; and he likewise had an Italian farrier named Hannibale, who, Berenger quaintly remarks, ' did not discover any great mysteries to his English brethren, but yet taught them more than they knew before.' HISTORY OF THE ENGLISH HORSE. 63 There is notliing -wortliy of remark in the short reign of Edward YT., •jxcept the constituting the stealing of horses a felony without benefit of slergy. In the twenty-second year of Elizabeth, the use of coaches was intro- duced. It has been already remarked that the heads of noble houses travelled almost from one end of the kingdom to the other on horseback, unless occasionally they took refuge in the cars that were generally ap- propriated to their household. Even the Queen rode behind her master of the horse when she went in state to St. Paul's. The convenience of this new mode of carriage caused it to be immediately adopted by all who had the means ; and the horses were so rapidly bought up for this purpose, and became so exorbitantly dear, that it was agitated in Parliament whether the use of carriages should not be confined to the higher classes. This fashion would have produced an injurious effect on the character of the English horse. It would have too much encouraged the breed of the heavy and slow horse, to the comparative or almost total neglect of the lighter framed and speedy one ; but, gunpowder having been invented, and heavy armour beginning to be disused, or, at this period, having fallen into almost perfect neglect, a Hghter kind of horse was necessary in order to give efiect to many of the manoeuvres of the cavalry. Hence arose the Hght cavalry — light compared with the horsemen of former days — heavy compared with those of modern times ; and hence, too, arose the hghter horse, which, except for a few particular purposes, gradually superseded the old heavy war and draught horse. An account has abeady been given of the occasional races at Smithfield. They were mostly accidental trials of strength and speed, and there were no 1-unnmg-horses, properly speaking — none that were kept for the pur- pose of displaying their speed, and dedicated to this particular purpose alone. Regular races, however, were now established in various parts of England, first at Garterly in Yorkshire, then at Croydon, at Theobald's on Enfield-chase, and at Stamford. Boucher, in his History of Stamford, says, that the first valuable public prize was run for at that place in the time of Charles I. It was a silver-gilt cup and cover, of the value of 8Z., provided by the corporation. There was no acknowledged system as now — no breed of racing- horses ; but hackneys and hunters mingled together, a«id no description of horse was excluded. There was at first no course marked out for the race, but the contest generally consisted in the running of train-scent across the country, and sometimes the most difficult and dangerous part of the country was selected for the exhibition. Occasionally our present steeple-chase was adopted with all its dangers, and more than its present barbarity ; for persons were appointed cruelly to flog along the jaded and exhausted horse. This perhaps requires a Kttle explanation. A match was formed called the ' Wild- Goose Chase,' between two horses, and a tolerably sure trial it was of the speed and hunting properties of the horse. Whichever horse obtained the lead at twelve score yards from the starting post, the other was compelled to follow him wherever he went, and to keep within a cer- tain distance of him, as twice or thrice his length, or else to be ' beaten up,' whipped up to the mark by the judges who rode to see fair play. If one horse got before the other twelve score yards, or any certain distance, according as the match was made, he was accounted to be the winner ; but if the horse which at the beginning was behind, could get before him that first led, then the other was bound to follow, and so on, until one got 240 yards, the eighth part of a mile, before the other, or refused some break-neck leap which the other had taken. By degrees, however, certain horses were devoted to these exhibitions. 64 HISTORY OF THE ENGLISH HORSE. acd were prepared for the race, as far as the mystery of the training stable could then be explored, somewhat in the same way as at present. The weight of the rider, however, was not always adjusted to the age or performances of the horse ; but no rider could stai't who weighed less than 10 St. The races of that period were not disgraced by the system of gambling and fraud which in later times seems to have become almost inseparable from the amusements of the turf. No heavy stakes were run for, and no betting system had been estabhshed. The prize was usually a wooden bell adorned with flowers. This Avas afterwards exchanged for a silver bell, and ' given to him who should run the best and farthest on horseback, and especially on Shrove Tuesday.' Hence the common phrase of ' bearing away the bell.' Horse-racing became gradually more cultivated ; but it was not until the last year of the reig-n of James I. that rules were promulgated and generally subscribed to for their regulation. That prince was fond of field-sports. He had encouraged, if he did not establish, horse-racing in Scotland, and he brought with him to England his predilection for it ; but his races were often matches against time, or trials of speed and bottom for absurdly and cnielly long distances. Bjs favourite courses were at Croydon and on Enfield-chase. Although the Turkish and Barbary horses had been freely used to produce -with the EngHsh mare the breed that was best suited to this exercise, little improvement had been effected. James, with great judgment, determined to try the Arab breed. Probably he had not forgotten the story of the Arabian that had been presented to one of his Scottish churches, five centuries before. He purchased from a merchant, named Markham, a celebrated Arabian horse, for which he gave the extravagant sum of five hundred pounds. Kings, however, like their subjects, are often thwarted and governed by their servants, and the Duke of Newcastle took a dislike to this foreign animal. He wrote a book, and a very good one, on horsemanship ; but he described this Arabian as a Httle bony horse, of ordinary shape ; setting him down as almost worthless, because, after being regiilarly ti-ained, he seemed to be deficient in speed. The opinion of the duie, probably altogether erroneous, had for nearly a centuiy great weight ; and the Arabian horse lost its reputation among the English breeders. A south-eastern horse was afterwards brought into England, and purchased by James, of Mr. Place, who afterwards became stud-master or groom to Oliver Cromwell. This beautiful animal was called the White Turk ; and his name and that of his keeper will long be remembered. Shortly after this appeared the Helmsley Turk, introduced by VOhers, the first duke of Buckingham. He was followed by Fairfax's Morocco barb. These horses speedily effected a considerable change in the cha- racter of our breed, so that Lord Harleigh, one of the old school, complained that the great horse was fast disappearing, and that horses were now bred light and fine for the sake of speed only. Charles I., however, ardently pursued this favourite object of English gentlemen ; and, a little before his rupture with the parhament, established races in Hyde Park and at Newmarket. We owe to Charles I. the introduction of the bit into universal use in the cavalry service, and generally out of it. The invention of the bit has been traced to as early as the time of the Roman emperors, but for some inexplicable reason it had not been adopted by the Enghsh. Charles I., however, in the third year of his reig-n, issued a proclamation stating that such horses as are employed in the service, being more easily majiaged HISTORY OF TILE ENGLISH HORSE. 65 by met. us of the bit than the snaflGle, he strictly charged and commanded that, except in times of disport — racing and hunting — no person engaged in the cavahy service should, in riding, use any snaffles, but bits only. It was feared by some that the love of hunting and racing was making somewhat too rapid progress ; for there is on record a memorial presented to Charles, ' touching the state of the kingdom, and the deficiency of good and stout horses for its defence, on account of the strong addiction which the nation had to racing and hunting horses, which, for the sake of swift- ness, were of a lighter and weaker mould.' The civil wars somewhat suspended the inquiry into this, and also the impro'^'^ement of the breed ; yet the advantage which was derived by both parties from a light and active cavalry sufficiently proved the importance of the change that had been effected. Cromwell, perceiving with his wonted sagacity how much these pursuits were connected with the prosperity of the country, had his stud of race-horses. At the Restoration a new impulse was given to the cultivation of the horse by the inclination of the court to patronise gaiety and dissipation. The races at Newmarket, which had been for a while suspended, were I'estored ; and, as an additional spur to emulation, royal plates were given at each of the principal courses. Charles II. sent his master of the horse to the Levant, to purchase brood mares and stalUons. These were prin- cipally Barbs and Turks. James II. lived in too unquiet a period to be enabled to bestow much time on the sports of the turf or the field. He has, however, been repre- sented as being exceedingly fond of hunting, and showing so decided a preference for the EngHsh horse as, after his abdication, to have several of them in his stables in France. Bei-enger speaks of this with much feeling: — ' He expressed a pecuHar satisfaction in having them, and that at a time, and in a situation in which it is natui*al to think that they were rather likely to have given him uneasiness and mortification than to have afforded him pleasure.' "WilHam III., and Anne, principally at the instigation of her consort, George, Prince of Denmark, were zealous patrons of the turf, and the system of improvement was zealously pursued ; every variety of Eastern blood Avas occasionally engrafted on our own, and the superiority of the newly-introduced breed above the best of the original stock began to be evident. Some persons imagined that this speed and stoutness might possibly be fiirther increased ; and ]\Ir. Darley, in the latter part of the reign ot Queen Anne, had recourse to the discarded and despised Arabian. He had much prejudice to contend with, and it was some time before the horse which he selected, and which was afterwards known by the name of the Darley Arabian, attracted much notice. At length the value of his pro- duce began to be recognised, and to him we are mainly indebted for a breed of horses of unequalled beauty, speed, and strength. The last improvement furnished all that could be desired : nor was this ti'ue only of the thorough-bred or turf-horse — it was to a very material degree tlae case with every description of hoi-se. By a judicious admix- ture and proportion of blood, we have rendered our hunters, our hackneys, our coach — nay, even our cart-horses, stronger, more active, and more enduring, than they were before the introduction of the race-horse. The history of the horse in England is a very interesting one. The original breed — that of which mention is first made in history — seems to have been a valuable one. The Conqueror can-ied away many specimens of it, and they were long held in repute in every country subjugated by the Romans. The insular situation of Britain, and its comparatively Kttioi P r5() THE DIFFERENT BREEDS OF ENGLISH HORSES. need of tlie war-horse, led under several monarchs to a culpable degree oi negligence ; and althoagh, perhaps, on the whole the English were not far behind their Continental neighbours, yet at no period, until within the last century and a half, has Great Britain been at all distinguished on this account : but from that time, and especially dui-ing the latter part of it, the British horse has been sought after in every part of the world. There is nothing in our climate that can account for this — nothing in our soil, or this superior excellence would have been acknowledged long ago. ' The grand first cause,' says Mr. Wm. Percivall, in his introductory lecture at University College, in 1834, ' — that, by the steady prosecution and scientific management of which tfiis success has been brought about, appears to me to be breeding ; by which I do not only mean the procura- tion of original stock of a good description, but the continual progres- sive cultivation of that stock in the progeny by the greatest care in rearing and feeding, and by the most careful selection. On these two circumstances, and particularly on the latter, a gi'eat deal more depends than on the original characters or attributes of the parents. By these means we have progressed from good to better, losing sight of no subsidiary help, until we have attained a perfection in horse-flesh unknown in the whole world beside.' The love of the turf, and the anxious desire to possess horses of un- rivalled excellence, have Avithin the last twenty years spread over the European continent. Everywhere stud-houses have been built and periodical races established, and sporting societies formed of persons of the greatest weight in the community, and, everywhere, zealo;is attempts have been made to improve the native stock. The coursers of the East might have been easily procured — a new supply of Arabian blood might have been obtained from the native country of the Barb : but French, and Itahans, Germans, Russians, and Flemings, have flocked to the British Isles. The pure blood of the present Barb and Arabian has been post- poned, and all have deeply dra^vn from that of the thorough-bred EngUsh horse. This is a circumstance with regard to which there is no dispute. It is a matter of history — and it is highly creditable to our sporting men and breeders. Mr. Percivall has rightly stated the cause, but there are some circumstances connected with this pre-eminence that may give occasion for serious reflection, and which -svill be best considered "^s thft respective breeds of horses pass in review. CHAPTER IV. THE DIFFERENT BREEDS OF ENGIflSH HORSES. THE EACE-HORSE. There was much dispute with regard to the origin of the tliorourjh-hred horse. By some he was traced through both sire and dam to Eastern parentage ; while others believed him to be the native horse, impi'oved and perfected by judicious crossing with the Barb, the Turk, or the Arabian, ' The Stud-Book,' which is an authority acknowledged by every English breeder, traces all the old racers to some Eastern origin, or at least until the pedigree is lost in the uncertainty of an early period of breeding, If the pedigree of a racer of the present day is required, it is traced bftck to a certain extent, and ends with a well-known racer ; or if an THE RACE-IIOKSE. 67 earlier derivation is required, that ends either Avith an Eastern horse or in obscurity. It is now admitted that the present EngUsli thorough-bred horse is of THE COLONEL. foreign extraction, improved and perfected by the influence of climate and diligent cultivation. There are some exceptions, as in the cases of Samp- son and Bay Malton, in each of which, although the best horses of their day, there was a cross of vulgar blood ; but they are only deviations from a general rule. In our best racing-stables this is an acknowledged principle ; and it is not, when properly considered, in the slightest degree derogatory to the credit of our country. The British climate and British skill made the thorough-bred horse what he is. The beautiful tales of Eastern countries and somewhat remote days may lead us to imagine that the Arabian horse possesses marvellous powers : but it cannot admit of a doubt that the English-trained horse is more beautiful and far swifter and stouter than the justly-famed coursers of the desert. In the burnijig plains of the East and the frozen climate of Russia, he has invariably beaten every antagonist on his native ground. It has been already stated that, a few years ago, Recruit, an English horse of moderate reputation, easily beat Pyramus, the best Ai^abian on the Bengal side of India. It must not be objected that the number of Eastern horses imported is far too small to produce so numerous a progeny. It will be recollected that the thousands of wild horses on the plains of South America de- scended from only two stallions and four mares, which the early Spanish adventurers left behind them. Whatever may be the truth as to the origin of the race-horse, the f2 G8 THE DIFFERENT BREEDS OF ENGLISH HORSES. strictest attention has for the last hundred years been paid to his pedigree. In the descent of almost every modern racer, not the slightest flaw can be discovered : or when, -with the splendid exceptions of Sampson and Bay Malton, one drop of common blood has mingled with the pure stream, it has been immediately detected in the inferiority of form and deficiency of stamina, and it has required two or three generations to wipe away the stain and get rid of its consequences. The racer is generally distinguished by his beautiful Arabian head : tapermg and finely-set-on neck ; oblique lengthened shoulders ; well-bent hinder legs ; ample, muscular quarters ; flat legs, rather short from the knee do^\^lward, although not always so deep as they should be ; and his long and elastic pastern. These will be separately considered when the structure of the horse is treated of. The Darley Arabian was the parent of our best racing stock. He was purchased by Mr. Barley's brother at Aleppo, and was bred in the neigh- boui'ing desert of Palmp-a. His figure contained every point, without much show, that could be desired in a turf-horse. The immediate descendants of this invaluable horse were the Devon- shire or Flying Childers ; the Bleeding or Bartlett's Childers, who was; never trained ; Ahnanzor, and others. FLYING CHILDERS. The two Childers were the means through which the blood and fame of their sire were ^videly circulated ; and from them descended another Chil- ders, Blaze, Snap, Sampson, Eclipse, and a host of excellent horses. The Devonshire or Flying Childers, so called from the name of his breeder, Mr. Childers, of Carr House, and the sale of him to the Duke of Devonshire, was the fleetest horse of his day. He was at first trained as a hunter, but' the superior speed and courage which he discovered caused him to' be soon transferred to the turf Common report aftirms that he could run a mile in a minute ; but there is no authentic record of this. Childers ran over the round course at Newmarket (three miles, six far- longs and ninety -three yards) in six minutes and forty seconds, and the THE RACE-IIORSE. 69 Beacon course (four miles, one fai-long, and one liunclred and thirtj-cight yards) in seven minutes and tliii-ty seconds. In 1772, a mile was run by Firetail in one minute and four seconds. In 1755, Bay Malton, the property of the Marquis of Rockingham, ran the four- mile course at York in seven minutes and forty-three seconds, this being seven seconds less time than it had ever been accomplished in before. Some of these old ones could run fost as well as stoutly. Twenty years afterwards there was a beautiful horse, the son of Eclipse, and inheritino- a great portion of his speed without his stoutness. He won almost every mile-race for which he ran, but he never could accomplish a four-mile one. He broke do^vn, in 1779, running over the Beacon course. One of the most realhj severe races that ever was run took place at CarHsle in 1761. There was no less than six heats, and two of them dead heats. Each of the six was honestly contested by the ^Wnning horse : therefore he ran in good earnest twenty-four miles : yet there was no breaking down, nor any account of the slightest injury received. The following are some additional instances of the mingled speed and endurance of these horses, and deserve to be placed on record : — In October, 1741, at the Curragh meeting in Ireland, Mr. "Wilde engaged to ride one hundred and twenty-seven miles in nine hours. He performed it in six hours and twenty-one minutes. He employed ten horses, and, allowing for mounting and dismounting, and a moment for refreshment, he rode during six hours at the rate of twenty miles an hour. Mr. Thornhill, in 1745, exceeded this; for he rode from Stilton to London and back, and again to London, being two hundred and thirteen miles, in eleven hours and thirty-four minutes. This amounts, after allow- ing the least possible time for changing horses, to twenty miles an hour for eleven hours, and on the turnpike-road and uneven gi'ound. Mr. Shaftoe, in 1762, with ten horses, and five of them ridden twice, 70 THE DIFFERENT BREEDS OF ENGLISH HORSES. accomplislied fifty miles and a quarter iu one hour and forty-nine minutes. In 17G3, he won a still more extraordinary match. He engaged to procure a person' to ride one hundred miles a day for twenty-nine days, having any number of horses not exceeding twenty-nine from which to make his selec- tion. He accomphshed it on fourteen horses; but on one day he was compelled to ride a hundred and sixty miles, on account of the tiring of bis lirst horse. j\Ir. Hull's Quibbler, however, afforded the most extraordinary instance on record, of the stoutness as well as speed of the race-horse. In Decem- ber, 1786, he ran twenty- three miles round the flat at Newmarket, in fifty- seven minutes and ten seconds. Eclipse was got by Marsk, a grandson of Bartlett's Childers, and his pedigi-ee affords a singular illustration of the descent of our thorough-bred horses from pure Eastern blood : — Bartlett's Childers Button's Black Legs fDarley Arabian. \ Betty Leeds {C"^'"" { ^^^"^" {^"^ ^""^ (Li»terTurk. „, „ ^ ' Daueliter 1 _ .^ m'Arccy White Turk (of Hautboy J Hautboy [ R^y^, Mare. Daughter ) Tjautbov of Hautboy / uautDoy. f Huttons Bay Turk. ,. /Ll.t^r Turk. ( Snake \ Da '•of I < IConeyskins (Daughter of . J (Daughter of ^ Daughter of 'Regulu Daughter "'{ SpUetta ( Hautboy. C Clumsy . •! Hautboy. ( Daughter of -J Leeds Arabian iConeyskint | Lister Turk. Daughter of < ! (Daughter of !. Button's Grey Barb fGodolpbin Arabian. i 1 Bald Galloway. (Daughter of i I Snake I Lister Turk. (Daughter of ■[ I. (Old Wilkes, by Hautboy /Smith's Son of Snake. [^Mother Western "J Old Montague \ Daughter of Hautboy. The pedigree of Echpse will likewise afford another curious illustration of the uncertainty which attends thorough-bred horses. Marsk was sold at the sale of the Duke of Cumberland's stud for a mere trifle, and was suffered to run almost wdld on the New Forest. He was afterwards purchased for one thousand g-uineas, and before his death covered for one hundred guineas. Squirt, when the property of Sir Harry Harpur, was ordered to be shot ; and while he was actually being led to the dog-kennel, he was spared at the intercession of one of Sir Harry's gTOoms. Neither Bartlett's Childers, nor Snake, were ever trained. On the side of the dam, Spiletta never started but once and was beaten ; and the Godolphin Arabian was purchased from a water cart in Paris. Eclipse was bred by the Duke of Cumberland, and sold at his death to Mr. Wildman, a sheep salesman, for seventy- five guineas. Colonel O'Kelly purchased a share of hiin from Wildman. In the spring of the follo\^dng year, when the reputation of this wonderful animal was at its height, O'Kelly wished to become sole owner of him, and bought the remaining share for eleven hundred guineas. Eclipse was what Avas termed a thick-winded horse, and puffed and roared so as to be heard at a considerable distance. For this or some other cause, he was not brought on the turf until he was five years old. O'Kelly, aware of his horse's powers, had backed him freely on his first race, in May 1769. This excited curiosity, or, perhaps, roused suspicion, and some persons attempted to watch one of his trials. Mr. John Law- rence says, that, ' they were a little too late ; but they found an old woman who gave them all the information they wanted. On inquiring whether she had seen a race, she replied she could not tell whether it was a race or THE RACE-HORSE. 71 not, but tliat slie had just seen a horse, with a white leg, running away at a monstrous rate, and another horse a great way behind, trying to run after him ; but she was sure he Avould never catch the white-legged horse if he ran to the world's end.' The first heat was easily won, when O'Kelly, observing that the rider had been pulling at Eclipse during the whole of the race, offered a wager that he placed the horses in the next heat. This seemed a thing so highly rtuprobable, that he immediately had bets to a large amount. Being called on to declare, he replied, ' Eclipse first, and the rest nowhere !' The event justified his prediction, for all the others were distanced by Eclipse with the greatest ease, and thus, in the language of the turf, they had no place. In the spring of the following year, he beat Mr. Wentworth's Buce- phalus, who had never before met with his equal. Two days afterwards, he distanced Mr. Strode's Pensioner, a very good horse ; and in the August of the same year, he won the great subscription at York. No horse daring to enter against him, he closed his short career, of seventeen months, by walking over the Newmarket course for the King's plate, on October the iSth, 1770. He was never beaten, nor ever paid forfeit, and won for his owner more than twenty-five thousand pounds. Eclipse was afterwards employed as a stallion, and produced the extra- ordinary number of three hundred and thirty-four winners, and these netted to their owners more than 160,000^. exclusive of plates and cups. The produce of King Herod, a descendant of Flying Childers, was even more numerous. He got no less than four hundred and ninety-seven winners, who gained for their proprietors upwards of two hundred thou- sand pounds. Highflyer was a son of King Herod. The profit brought to the owner of Eclipse by his services as a stallion must have been immense. It is said that ten years after he was with- drawn from the turf, O'Kelly was asked at what price he would sell him. At first he peremptorily refused to sell him at any price, but after some reflection, he said that he would take 25,000Z., with an annuity of 500Z. a year on his own life, and the annual privilege of sending six mares to him. The seeming extravagance of the sum excited considerable remark ; but O'Kelly declared that he had already cleared more than 25,000Z. hy him, and that he was young enough still to earn double that sum. In fact, he did live nearly ten years afterwards, covering at 50 guineas a mare, for some part of the time ; but his feet having been carelessly and cruelly neglected, he became foundered. His feet rapidly grew worse and worse until he was a very uncertain foal-getter ; and the value of his progeny was more than suspected. He died in February 1789, at the age of twenty-five years. Of the beauty and yet the peculiarity of his form there has been much dispute. His lowness before was evident enough, and Avas a matter of objection and reproach among those who could not see how abundantly this was redeemed by the extent and obliquity of the shoulder, the broadness of the loins, the ample and finely-proportioned quarters, and the swelling and the extent' — the sloping and the power of the muscles of the fore-arm, and of the thighs. A little before the death of Eclipse, M. St. Bel, the founder o* the Veterinary College in St. Pancras, had arrived from France. In teacliing the French pupils the general conformation of the horse, and the just pro- portions of his various parts, it had been necessary that reference should be made to some horse of acknowledged excellence. It occui-red to St. Bel that this extraordinary and unbeaten horse would be the proper standard to which the English student might be referred for a similar purpose, and, 72 THE DIFFERENT BREEDS OF ENGLISH HORSES. with considerable trouble, be formed an accurate scale of tbe proportions of tbis noble animal. It is as follows : — PHOPOETIONS OF ECLIPSE. Although it is perfectly true, as stated by Mr. Blaine, in his ' Outlines of the Vrterinary Art,' that 'for racing, we require that the greatest possible quantity of bone, and muscle, and sinew, should be got into the smallest bulk, and that, in addition to great flexibiUty and some length, the limbs must be strongly united, the chest deep and capacious, and the hinder extremities furnished with powerful muscles ; for hunting, we must have a similar yet somewhat bulkier horse, with powerful loins, and more powerful quarters, and for the hackney, while we undervalue not the strength of the loins and the quarters, we look more to the elevated withers, and the deep and muscular shoulders, and the straight and well-formed leg ;' j'et there is a nearer and a truer proportion between llie several parts of these kindred animals than manj' persons are disposed to allow; and this sketch of them in Eclipse, will not only be interesting, but useful, to the general horseman. The length of the head of the horse is supposed to be divided into twenty-two equal parts, which are the common measure for every part of the body. Three heads and thirteen parts will give the height of the horse from the foretop to the ground. Three heads from the withers to the ground. Three heads from the rump to the ground. Three heads and three parts the whole length of the body, from the most prominent part of the chest to the extremity of the buttocks. Two heads and twenty parts the height of the body, through the middle of the centre of gravity. Two heads and seven parts, the height of the highest part of the chest from the ground. Two heads and five parts, the height of the perpendicular line which falls from the articulation of the arm with the shoulder, directly to the hoof. One head and twenty parts, the height of the perpendicular line which falls from the top of the fore-leg, dividing equally all its parts to the fetlock. One head and nineteen parts, the height of the perpendicular line from the elbow to the ground. One head and nineteen parts, the distance from the top of the withers to the stifle. The same measure also gives the distance from the top of the rump to the elbow. One and a half head, the length of tbe neck from the withers to the top of the head. The same measure also gives the length of the neck from the top of the head to its insertion into the chest. Olc head, the width of the neck at its union with the chest. Twelve parts of a head, the width of the neck in its narrowest part. The same measure gives the breadth of the head taken below the eyes. One head and four parts, the thickness of the body from the middle of the back tc the middle of the belly. The same measure gives the breadth of the body. Also the rump from its summit to the extremity of the buttocks. Also the distance from the root of the tail to the stifle. Also the length from the stifle to the hock. Also the height from the extremity of the hoof to the hock. Twenty parts of a head, the distance from the extremity of the buttocks to the stifle. Also the breadth of the rump or croiip. Ten parts of a head, the breadth of the fore-legs from their anterior part to the elbow. Ten parts of a head, the breadth of one of the hind-legs taken beneath the fold of th«i buttocks. Eight parts of a head, the breadth of the ham taken from the bend. Also the breadth of the head above the nostrils. Seven parts of a head, the distance of the eyes from one great angle to the other. Also the distance between the fore-legs. Five parts of a head, the thickness of the knees. Also the breadth of the fore-legs above the knees. Also the thickness of the hams. Four parts of a head, the breadtli of the pastern, or fetlock joint. Also the thickness of the coronet. Four and a half parts of the head, the breadth of the coronet. Three parts of a head, the thickness of the legs at their narrowest part. Also the breadth of the hinder legs or shanks. Two and three-quarter parts of a head, the thickness of the hind-pasterns. Also the breadth of the shanks of the fore-legs. Two and a quarter parts of a head, the tluckness of the fore-pasterns. Also tno breadth of the hind-pasterns. OtA and three-quarter parts of a head, the thickness of the fore and hind shanks. THE HACE-HOESE. 73 ^lore than twenty years after the Darley Arabian, and when the value of the Arabian blood was fully estabhshed, Lord Godolphin possessed a beautiful but singularly-shaped horse, which he called an Arabian, but which was really a Barb. His crest, lofty and arched almost to a fault, will distinguish him from every other horse. It will like^vise be seen from the cut (p. 19), that he had a sinking behind his shoulders, almost as peculiar, and a corresponding elevation of the spine towards the loins. His muzzle was uncommonly fine, his head beautifully set on, his shoulders capacious, and his quarters well spread out. He was bought in France, where he was actually employed in drawing a cart ; and when he was afterwards presented to Lord Godolphin, he was in that nobleman's stud a considerable time before his value was discovered. It was not until the birth of Lath, one of the first horses of that period, that his excellence began to be appreciated. He was then styled an Arabian, and became, in even a greater degTee than the Darley, the founder of the modern thorough -bred horses. He died in 1753, at the age of twenty-nine. An intimate friendship subsisted between him and a cat, wliich either sat on his back when he was in the stable, or nestled as closely to him as she could. At his death, she began to refuse her food, and pined away, and died. — Mr. Holcroft gives a similar relation of the attachment between a race-horse and a cat, which the courser would take in his mouth and place in his manger and upon liis back without hurting her. Chillaby, called from his gTcat ferocity the Mad Arabian, whom one only of the grooms dared to approach, and who savagely tore to pieces the image of a man that was pui^posely placed in his way, had his peculiar attachment to a lamb, who used to employ himself for many an hour in butting away the flies from his friend. Another foreign horse, was the Wellesley Arabian ; the very picture of a beautiful vnld horse of the desert. His precise country was never determined. He is evidently neither a perfect Barb, nor a perfect Arabian, but from some neighbouring province, where both the Barb and Arabian would expand to a more perfect fulness of form. This horse has been erroneously selected as the pattern of a superior Arabian, and therefore we have introduced him : few, however, of his produce were trained who can add much to his reputation. At the commencement of the last century, when public races had been estabhshed in the neighbourhood of almost every large town, and when many of them were especially patronised by royalty, although there was sufficient opportunity given for the value of the young stock to be ex- hibited, or at least gniessed at, the contest principally lay among the adults. — The kind of contest which was best calculated to try the worth of the horse, and to promote the actual improvement of the breed, was one of mingled speed and endurance. They were mostly heats for distances of three or four miles. Occasionally they were for greater lengths, even ex- tending to six or eight miles ; and in one case, when the Duke of Queens- beriy's Dash beat Lord Barrymore's Highlander, twelve miles. This, however, was cruel and absurd, and never established itself among the best suj^porters of the turf. Four miles constituted the average distance, not only for king's plates, but for simple matches ; and the horses did not sleep on theii' way. There were occasionally as extraordinary bursts of speed as are now wit- nessed in our mile and a half races. Did the horses of those days come to any extraordinary harm ? Did they ruin themselves by the exertion of one day and appear no more ? The anonymous writer of a most interesting and valuable work ' A 74 THE DIFFERENT BREEDS OF ENGLISH HORSES. Comparative view of the English Racer and Saddle Horse during the Last and Present Centuries ' — mentions a horse called Exotic, that was on the turf eleven years. 'We do not know,' says our author, 'how many times he started during this period, but in the course of it he won eighteen times. In his seventh year on the turf he won a race at Peter- borough consisting of four heats of four miles each.* ' Four horses were handicapped by Dr. Bellyse at Newcastle-under- Lyne — Sir John Egerton's Astbury, Mr. Milton's Handel, SirW. Wynne's Tarragon, and Sir Thomas Stanley's Cedric. The following was the result : — Of the first three heats there was no winner. Tarragon and Handel being each time nose and nose, and, although Astbury was stated to have been third in the first heat, yet he was so nearly on a level with the others, that there was a difficulty of placing him as such. After the second heat, the steward requested two other gentlemen to look with him steadily as they came, to try to decide in favour of one of them, but it was impossible to do so. In the third dead heat Tarragon and Handel had struggled with each other until they reeled about as if they were drunk, and could scarcely caiTy their riders to the scales. Astbury, who had laid by after the first heat, then came out and won. The annals of the turf cannot produce another such contest, founded on a thorough knowledge of the horses, their ages, and their previous running.' 'In 1737, Black Chance, at five years old, won a plate at Durham, carrying 10 st. With the same weight he won the Ladies' plate at York, in that year. In 1738, he won the king's plate at Guildford, beating several horses. He won the plate also at Salisbury, at Winchester, at Lewes, and at Lincoln — five king's plates in one season, and every race four miles and contested. The same horse was in the field in 1744, and he walked over for the annual plate at Faraden.' What are our racers now ? They are speedier. That it would be folly to deny. They are longer, lighter, but still muscular, although shorn of much of their pride in this respect. They are as beautiful creatures as the eye would wish to gaze on, but the greater part of them give in before half the race is run ; and out of a field of fifteen, or even twenty, not more than two or three of them live, in the exertion of their best energies, far within the ropes. And what becomes of them when the struggle is over ? After the severe racing, as it is now called, of former times, the horse came again to the starting-post with not a single power impaired ; and year after year he was ready to meet any and every rival. A single race, however, like that of the Derby, now occasionally disables the winner from ever running again ; yet the distance is only a mile and a half. The St. Leger is more destructive to the winner, although the distance is less than two miles. The race of the day has been run ; some heavy stakes have been won by the owner ; the animal by whose exertions they were gained is led away, and it is sometimes an even chance whether he is ever heard of, or, perhaps, thought of again. He has answered the purpose for which he was bred, and he has passed away. And by what witchery has all this been accomplished ? How came it that skilful and honourable men should have conspired together to dete- riorate the character of the racer, and ^vitli him that of the EngHsh horse generally ? Why, there was no conspiracy in the matter. It was the natural course of things. The race-horses of the beginning, and even of the middle, of the last century were fine powerful animals ; they had almost as much fleetness as could be desired, and they had strength that would never tire. He who bred for the turf might in his moments of reflection THE EACE-HORSE. 76 bo pleased by the conviction that, while he was accomplishing his own purpose, he was breeding an animal valuable to his country. He might be gratified by this reflection, yet it would not influence the system which he pursued. He tvould breed to win ; and he would naturally try to add a little more speed to the acknowledged power. Thence came the Mam- brino and the Sweet Briar, and others who had lost but little of their com- pactness of form — who had got rid of a portion of that which an enemy mightcall coarseness, but none of the capacity of the chest, or the substance or the power of the muscular system — whose speed was certainly increased, and whose vigour was not impaired. It is not in human nature to be satisfied even with perfection ; and it was tried whether a little more fleetness could not be obtained. It was so — and, some thought, with a slight impairment of stoutness. There were those, and they were not altogether Avi-ong, who saw in Shark and Gimcrack an e-vident increase of speed, and little diminution of strength. It was easy to imagine what would now be the result. The grand prin- ciple was speed. It was taken for granted that stoutness would follow — or rather, in the selection of the stock, stoutness was a minor consideration. The result of this Avas a horse with an elongated frame — as beautiful as his predecessors, or more so, but to the eye of the scientific man displaying diminished muscles and less prominent sinews, and sharper and less power- ful withers. The fleetness was all that heart could desire, but the endur- ance was fearfully diminished. Irresistible proof was soon given of this. They could not nin the distances that their predecessors did with ease. Heats became unfashionable — they were esteemed, and with too much truth, severe and cruel. We might refer to the disgraceful exhibitions of Chateau Margaux, and Mortgage, and Lamplighter. The necessary con- sequence was that the ground riru over in the ordinary matches was lessened a full half. And was not this sufficient to convince the man of the turf — the breeder of horses for his oaati use — was not this sufficient to convince him of the error which he had committed ? Perhaps it was, with regard to those who would give themselves the trouble to think. But the error had been committed. The all-important question was, how could it be repaired ? Were they to breed back again to their former stoutness ? There were mdividuals stout and speedy, but tlie breed was gone. Beside, the short race had become fashionable. It was determined in two or three minutes. There was not the lengthened suspense of seven or eight rotations of the second-hand of the watch ; and who could resist the omnipotence of fashion ? some harsh expressions have been used mth regard to the leading sporting characters of that time ; but what power had they of resistance ? They had bred for speed. They had obtained it. They had obtained that kind of race that would be popular, for it was shoi-t. They had no alternative, except Avith regard to the king's plates. There they should have made a stand. The interests and honour of the country should not have been saci-ificed because they had erred. There should have been something left to encourage the continuance of the old and un- rivalled blood — something to fall back upon when the fashionable leaders of the sporting world had discovered their error. This battle, however, must yet be fought. Additional reasons for it will appear when the pre- sent state of the hunter and the road-horse are considered. There is one circumstance connected with these short races which perhaps has not been sufficiently appreciated. On the old system, the trueness and the stoutness of the horse would generally insure the prize to him that best deserved it ; but with the present young horses and short 7f this is repeated ttee o,- four t.mes ^^ a ludfciout S^ttSb t,.vellcrs, that ,vhen a horse begins to refuse Return Son afte; he has partien of the refreshing draught. CHAPTER VII. TUE ZOOLOGICAL CLASSIFICATION OF THE HOUSE. :itu?a^sTs%?rd rcerS^p^culiarities of form ^bicb sbould oba- J^oteAeceS classes, and otLr lesser peculiarities agam subdmdmg ^^^."SdiTision of animals is into ^eriehmted and invertelmted. ^ / , °,,jTJmals are tbose wbicb bave a mnmm, or bony cavity Yerkhmted ""^"^f'" ''J' "°"^„,i„„ „f bones called tbe spw, and the a Trolon-ation of the brain, denominated tbe spmal viarrcw. ktrtC^L^t thlSn^rX^^^^^^ be has a ^^bLSei:=^^^^^ 1 J ..P ^u Vinrl^ birds fishes, and many reptiles. VVe natuiauy quadrupeds "f J^l 1;'^° V™^ ^'^^ ' ,i„pie line ol distinction is soon look 'f7»>^'=!,r^JX'sr«rtebrated aliimals have mammm or t«ats, presented CevU^ot *-^^^^''^^^"'' Tbe human female has two, Tj^t'XXcZ^^X bLb ten or twelve, and tbe sow more ^'^Thirchi of vertebrated animals having mamma> or teats is called J»w a' fand the horse belongs to tbe division vMmta, and tlie class "' Tb"' "iass mammalia is still exceedingly large, and we must again sub- 1 ic Class m |-L;braiT of Enteitoining Knowledge, vol. 1. p. lo) Jirt HHs class of ;uadli^peds,'or mammiferons quadrupeds, admits of a ■"^f °?h':^° whcs?ex?;emities are divided into fingers or toes sdenti- s::Si:rrh!s.5:-n:ifi^-^e:rdX^^^^^^^^^^^ cond ribe are eVWed --^ly *» -PP^' .Tw7oI5 '--lic i the body isL^;p:?£rS:iu"trhrcaTnr^^^^ ''tu?\l::c is'a^r ^rSy'-^ftoofed animals. Tbe eiepbant, the 140 THE SKELETON OF THE HORSE. rhinoceros, the hippopotamus, the swine, the horse, the sheep, the deer,, and many others, are ungulated or hoofed ; they admit, however, of an easy division. Some of them masticate, or chew their food, and it is im- mediately received into the stomach and digested ; but in others the food, previous to digestion, undergoes a very singular process. It is returned to the mouth to be remasticated, or chewed again. These are called ruminantia, or ruminants, from the food being returned from one of the stomachs (for they have four), called the rumeit, or paunch, for the purpose of remastication. The ungulata that do not ruminate are, somewhat improperly, called pachjdermata, from the thickness of their skins. The horse does not ruminate, and therefore belongs to the order jjachijdennata. The pachydermata who have only one toe belong to the family solipeda sinqle-footed. Therefore the horse ranks under the division vertebrata — the class mammalia — the tribe ungulata — the order pachydermata — and the family solipeda. The solipeda consist of several sjjecies, as the horse, the ass, the mule, and the quagga. First stands the Equus Caballus, or Common Horse. Animals are likewise distinguished according to the number, descripv tion, and situation of their teeth. The horse has six incisors or cutting teeth in the front of each jaw ; and one canine tooth or tush. On each side, above and below — at some distance from the incisors, and behind the canines, and with some intervening space — are six molar teeth, or grinders ; and these molar teeth have flat cro-niis, with ridges of enamel, and that enamel penetrating into the substance of the tooth. The whole is thus represented by natural historians : — 6 . 1—1 , G—^ Horse, — Incisors -^, canmes , -r ^°^^"6-G- Total, fortj^ teeth. rnr; skei.etox of the hoesi?. A TheHcail. a The posterior maxillary or under jaw. THE MUSCLES OF THE IIOKSE. 141 0 The superior maxillary or upper jaw. A little lower do^^^l than the letter is a foramen, tlirough which pass the nerves and blood-vossels which chiefly supply the lower part of the face. c The orbit, or cavity containing the eye. d The nasal bones, or bones of the nose. e The suture dividing the parietal bones below from the occipital bones above. / The inferior maxillary bone, containing the upper incisor teeth. B The Seven Cervical Vertebrae, or bones of the neck. C The Eighteen Dorsal Vertebrae, or bones of the back. D The Six Lumbar Vertebrae, or bones of the loins. E The Five Sacral Vertebrse, or bones of the haunch. F The Caudal Vertebrse, or bones of the tail, generally about fifteen. G The Scapula, or shoulder-blade. H The Sternimi, or forepart of the chest. 1 The Costse or ribs, eight articulating with the sternum, and called the true ribs, and ten united together by cartilage, called tlie/alae ribs. J The Humerus, or upper bone of the arm. Iv The Eadius, or bone of the /ore-arm. L The Ulna, or elbow. The point of the elbow is called the Olecranon. M The Carpus or knee, consisting of seven bones. K The metacarpal bones. The larger metacarpal or cannon or shank in front, and the smaller metacarpal or splint bone beliind. g The pastern, consisting of the Os Suifraginis, or the upper and larger pastern bone, with the sesamoid bones behind, articulating with the cannon and gi-eater pastern ; /;, the Os Coronas, or lesser pastern ; i, the Os Pedis or cofBn bone, and the Os Navicular, or na^-icular, or shuttle-bone, not seen, and articulating with the smaller pastern and coffin bones. g h i The corresponding bones of the hind-feet. 0 The Haunch, consisting of three portions, the Ilium, the Ischium, and the Pubis. P The Femur or thigh. Q The stifle joint -n-ith the Patella. R The Tibia or proper log-bone — behind is a small bone called the fibula. S The Tarsus or hock, composed of six bones. The prominent part is the Os Calcis, or point of the hock. T The Metatarsals of the hind leg. THE MUSCLES OF THE HORSE. Having finished the description of the skeleton, it may now be desira- ble to give the more important of the muscles by which they are acted on ; this description, however, must be a very general one, and will be limited to the first layer of muscles, or those found immediately under the skin, on which, however, the shape and power of the animal, to a very considerable degree, depends ; one plate will be sufiicient to delineate these, and its description -svill include all that is necessary for the general reader to be acquainted with. 1. Levator Angliosis, is a portion of the paniculus carnosus converging towards the angle of the mouth, which it retracts or draws back. 2. Betrador Lahii Suiierioris, arises from the superior jDortion of the maxil- lary bone, and is inserted into the upper part of the angle of the mouth, which it draws on one side. 3. Levator Lalii Superioris alceque Nasi, arises from the junction of the lachrymal, nasal, and superior maxillary bones, and divides into two parts, one insex'ted in the lateral part of the nostril, and the other into the upper and lateral part of the Hp ; its action is to raise the hp and dilate the nostril. 4. Z)jgomatlcus, arises from the zygomatic ridge, and is also inserted into the angle of the mouth, which it retracts. 5. Caninus is a penniform muscle ; the superior portion arises from the superior maxillary bone, a little above the upper canine tooth ; the lower from the posterior maxil- lary, just below the lower canine tooth ; the two meet each other in the space between the upper and lower jaw ; its use is to compress the cheeks. 6. Buccinator arises from ttie superior and inferior maxillary bones, from just above and below the edges of the alveolar sockets, a little posterior to 142 THE MUSCLES OF THE HORSE. the last molar tootli — is inserted in the comer of the mouth, and assists the tongue in moAang about the pellet of food in the act of mastication. 7. Retractor Lahii Inferioris arises from the lower jaw, as far back as the last molar tooth, where it becomes blended "o-ith the orbicularis oris, and is inserted into the inferior part of the lower lip, which it retracts. 8. 8. Pannicidus Carnosus, a portion of a thin muscle spread over the head, neck, and bodj, to corrugate the skin when irritated, as a compensation for the want of hands. 9. Orhicidaris PaJpehram, surrounds the surface of the eyelids. 10. Temporalis arises from the occiput, frontal, parietal, squamous, temporal, and sphenoid, bones, and is inserted in the caracoid process of the lower jaw ; its office is to close the mouth. 11. Orhicidaris Oris surrounds the mouth, is more developed in the upper than in the lower lip ; its action is to close the lips. 12. 12. 12. Levator Humeri, arises from the mastoid process of the petrous temporal bone, the wing of the atlas, from the second, third, and fourth cervical vertebife, and from the lower portion of the hgamentum. nuchas ; it is inserted into the anterior and inferior part of the humeras, and its action, when the head is fixed, is to advance the foreleg, or when the legs are fixed, one muscle will pull the head on one side, or both will curve the head downwards. 13. The SjyJenius arises from the mastoid process of the petrous temporal bone, the spines of the second, third, and fourth dorsal vertebree, and is inserted into the five first cervical A-ertebrse and vnng of the atlas ; it curves the head on one side or, both acting, raise it. 14. The Parotid Gland, which secretes the most considerable portion of the saliva. A. Trapezius arises fi'om the second to the eleventh dorsal, and from the Hgamentum nuchse, as far forward as the third cervical vertebrte ; it is inserted into the spine of the scapula, and its action is to draw the shoulder upwards and backwards. TlIK MUSCLES OF THE IIOKSE. 143 B. Latissimus Borsi arises from the fascia of the loins, and the superior spinal ligament ; it is inserted into the inner side of the humerus ; it aids in retracting the arm and bracing the muscles of the back. C. Postea Spinatus is attached to the whole surface of the posterior fossa of the scapula ; it is inserted into the humenis a little behind the outer tubercle, and also to the upper part of the ridge, on the upper and outor part of this bone. It flexes the arm on the shoulder. D. Antea Sjnnatus is attached superiorly to the surface of the anterior fossa, and two- thirds of the anterior cosfa of the scapula, inferiorly to the greater and lesser tubercle of the humerus. It straightens the humerus on the scapula and throws the shoulder outwards. E. Teres Externus arises from a tubercle on the posterior angle of the scapula, and is inserted into the upper and outer surface of the humerus ; it aids in flexing the shoulder on the arm. F. Scapido Ulnaris arises from the upper part of the superior and pos- terior angle of the scapula, inserted into the inner and upper part of the ulna, which it flexes on the scapula, and draws the elbow inwards. Gr and H. Caput Magnum and Medium of the triceps extensor hrachii, arises from the posterior margin of the scapula, from a ridge on its neck ; from the outer side, and from the body of the humerus, and is inserted into the olecranon or point of the elbow. It is of great use in draught, in pushing the body against the collar, or in forcing the forelegs under the body. I. Pectoralis Magnus arises from the fascia of the external oblique muscles, the ensiform cartilage and from the three last bones of the sternum, and is inserted into the inferior part of the inner tubercle of the humerus ; it aids the muscles of the haunch in the propulsion of the trunk, and assists in respiration. K K K. Serratus Magnus arises from the four last cervical vertebrte, from the whole length of the first four ribs, and from portions of the four next; it is inserted into the concavity of the scapula. It moves the shoulders in progression, and when at rest enlarges the chest and assists in laboured respiration. L L. Obliquus Externus Abdominis arises by fleshy digitations from the fourteen posterior ribs, from two-thirds of the crest of the ilium, and its anterior spinous process ; it passes over the lateral and inferior portions of the belly to meet its fellow from the opposite side, and form the Knea alba, posteriorly, into the symphysis pubis ; it assists in expelling the feeces and urine. M. Gluteus Maximus arises from the crista and the dorsum of the ilium, and from the sacro-sciatic ligament ; it is inserted into the great trochanter and also along the body of the femur, as far as the small external ti-o- chanter ; its use when the hindlegs are fixed, is in raising the anterior part of the body ; when in action, it abducts and retracts the femur, and is actively engaged in kicking, N. Gluteus Externus arises from the spines of the ilium and sacrum and is inserted into the small trochanter of the femur and the fascia of the thigh ; it advances the femur. 0 0 0. Triceps Abductor Femoris arises from the spines and transverse processes of the sacrum — from the sacro-sciatic ligament, from the great trochanter of the femur and the tuberosity of the ischium ; it is inserted into the outer side of the patella and the superior portion of the tibia ; its action is to steady the body, and to raise it when the feet are firmly fixed, as in leaping ; it is a most important organ of progression, and is not inactive in kicking. P. Biceps Rotator Tibialis ai-ises from the last sacral and two uvA 144 THE SENSORIAL FUXCTION. coccygeal bones, tlie posterior part of tlie tuberosity of the ischium. ; in- serted into tlie inner, upper, and anterior part of the tibia : rotates and abducts the thigh, Q. Tensor Vagina arises from the anterior spine of the iHum, and is inserted into the trochanter minor externus of the femur, the fascia of the baunch and the patella ; it advances the leg and tightens the fascia of the caunch. CHAPTER VIII. THE SENSORIAL FUNCTION. Beautiful as is the horse, and identified so much with our pleasure and our profit, he has been the object of almost universal regard ; and there are few persons who do not pretend to be somewhat competent judges of his form, qualities, and worth. From the nobleman with his numerous and valuable stud, to the meanest helper in the stable, there is scarcely a man who would not be offended if he were thought altogether ignorant of horse-flesh. There is no subject on which he is so positive ; there is no subject on which, generally speaking, he is so deficient ; and there are few- horses, on some points of which these pretended and self-sufficient judges would not give a totally opposite opinion. The truth is, that this supposed knowledge is rarely founded on prin- ciple— or is the result of the slightest acquaintance with the actual struc- ture of the animal, the form and connection of parts on which strength, or fleetness, or stoutness must necessarily depend. In speaking of the structure of this animal, and the points which guide the opinion of real judges of him, we shall, as briefly and as simply as we are able, explain those fondamental principles on which his usefulness and beauty must depend. "We require one kind of horse for slow and heavy draught, and another for lighter and quicker work ; one as a plea- sant and safe roadster — another, with more speed and equal continuance, as a hujiter — and another still is wanted for the race-course. What is the peculiarity of structui-e — what are the particular points that will fit each for his proper business, and, to a certain degree, unfit him for every, thino- else ? The farmer will require a horse of all-wo7-h, that can carry him to market and take him round his farm — on which he can occasion- ally ride for pleasure, and which he must sometimes degrade to the dung- cart or the harrow. What combination of powers will enable the animal to discharge most of these duties well, and all of them to a certain extent profitably ? Much time spent among horses, an acquired love of them, and a httle, sometimes possibly too dearly-bought, experience, may give the agricul- turist some insight into these matters. We will try whether we cannot assist him in this affair — whether we cannot explain to him the reason why certain points must be good, and why a horse without them must of necessity be good for nothing. Perhaps some useful rules may thus be more deeply impressed upon his memory, or some common but dangerous prejudices may be discarded, and considerable degree of error, disappoint- ment, and expense avoided. K Ave treat of this at considerable length, let it' be remembered that the horse is our noblest servant, and that, in describing the structure and economy of his frame, we are in a gTcat mcasui'e desci-ibing that of other domestic quadrupeds, and shall hereafter have to speak only of points of THE SENSORIAL FUNCTION. Mrj dLffereuce required by tlie different services and uses for wliicli they were destined. Aaid further, let it be remembered, that it is only by being well acquainted ■with the structure and anatomy of the horse that we can appreciate his shape and uses, or understand the different diseases to which he is hable. It is from the want of this that much of the mass of ignorance and prejudice which exists as to the diseases to which he is subject is to be referred. We begin -wdth the head, containing the brain and the most important organs of sense. The following cut represents the head of the horse divided into the numerous bones of which it is composed, and the boundaries of each bone clearly marked by the sutiu-es which connect it with those around. The upper and broadest part is the cranium or skull in which the brain is contained and by which it is protected. It is composed of twelve bones, four pairs and four single ones : the four pairs are the two frontal, two parietal, two sqixamous temporal, and two petrous temporal ; the single are, the occij^ital bone, the sphenoid, the ethmoid, and the os triqua- trum ; of these, the ones sketched in the plate are : — a a The frontal bones, or bones of the forehead. 0 b The supra-orbital foramina, or holes above the orbit, through which the nerves and blood-vessels supplying the forehead pass out. The small hole beneath receives the vessels -which dip into and supply the bone. c c The parietal bones, or walls of the skull. d d The temporal bones, or bones of the temples. e e The zygomatic, or yoke-shaped arch. // The temporal fossa, or pit above the eye. g The occipital bone, or bone of the hinder part of the head. h h The orbits containing and defending the eye. i i The lachrymal bones belonging to the conveyance of the tears from the eyes. j j The nasal bones, or bones of the nose. k k The malar, or cheek-bones. 1 1 The superior maxillary, or that portion of the upper jaw containing the molar teeth or grinders. m m The infra-orbital foramen — a hole below the orbit, through which pass branches of nerves and blood-vessels to supply the lower part of the face. n n The inferior maxillary, the lower part of the upper jaw- bone— a separate bone in quadrupeds, containing the incisor or cutting teeth, and the upper tushes at the point of union between the superior and inferior max- illaries. 0 The upper incisor or cutting teeth. p j> The openings into the nose, with the bonea forming the palate. There is an evident intention in this division af the head into so many bones. When the foetus — the unborn foal — first begins to have life, that which afterwards becomes bone, is a mere jelly-like substance. This is gradually changed into a harder material — cartilage ; and, before the birth of the animal, much of the cartilage is taken aAvay by vessels called absorbents, and bone deposited in its stead. In flat bones, like those of the head, this deposit takes place in the centre, and rays or radiations of bone extend thence in every direction. Then, by having so many bones, there are so many centres of radiation ; and, consequently, the formation of bone is carried on so much the more rapidly, and perfected at the time when the necessities of the animal require it. At the period of birth, however, this process is not completed, but the edges of the bones remain somewhat soft and pHant, and ijierefore, in parttuition, they yield a. httle UG THE SENSORIAL FUNCTION. and overlap each other, and thus, by rendering the birth more easy, thoy save the mother much pain, and contribute to the safety of" the foal. The first of these bones, or the first pair of them, occupying the broad expanse of the forehead, are called the frontal hones, a a. They are united together by a most curious and intricate dove-tailing, to defend the brain which lies beneath the upper part of them. Lower down, and where the cavity of the nose is to be defended, their union is sufiicient, but far less complicated. Thus, at first starting, there is an evident proof of desi"Ti, an illustration of that adaptation to cii'cumstances which will ar^ain and again present itself in the most interesting points of view. Peculiar strength of union is given where a most important organ is to be defended — ^the suture is there intricate and laboured. Where less im- portant parts are covered, it is of a far simpler character. The inner plate of the frontal bone covers a considerable portion of the anterior part of the brain, and it is studded with depressions corresponding with irregularities on the surface of the brain. Few thino-s more clearly indicate the breed or blood of the horse than the form of the frontal bones. Who has not remarked the broad angular forehead of the blood horse, giving him a beautiful expression of intel- ligence and fire, and the face gradually tapering from the forehead to the muzzle, contrasted with the large face of the cart or di^ay horse, and the forehead scarcely wider than the face ? At/, between the frontal bones, is the pit or cavity above the eye, and by the depth of which we form some idea of the age of the horse. There is placed at the back of the eye a considerable quantity of fatty substance, on which it may revolve easily and without friction. In aged horses, and in diseases attended with general loss of condition, much of this dis- appears ; the eye becomes sunken, and the pit above it deepens. It is said that some of the lower class of horse-dealers puncture the skin, and, with a tobacco pipe or small tube blow into the orifice, until the depression is almost filled up. This, -with the aid of a bishopped tooth, may give a false appearance of youth, that will remain during some hours, and may deceive the unwary, but the trickery may easily be detected by pressing on the part. These bones, however, are not sohd, but a considerable portion of them is composed of two plates receding from each other, and leaving numerous and laro-e vacuities or cells. These vacuities are called the frontal sinuses. The sinus on the different sides of the forehead do not communicate with each other, but with other sinuses in the ethmoid, and sphenoid, and upper jaw-bones, and also with the cavities of the nose on their respective sides. These sinuses afford a somewhat increased protection to the brain beneath ; and by the continuous and slightly projecting line which they form, afford lightness, while they give beauty to the forehead ; but their principal use probably is, like the Avindings of the French horn, to increase the clearness and loudness of the neighing. It will be remarked that they are very irregular in depth, which at one place is an inch or more. Immediately above the frontal, and extending from the frontal to the poll, are the j^cn'ietal bones, c c. They are two, united together by a suture when the animal is young, but that suture soon becoming obliterated. They have the occipital, g, (p. 145) above, the frontals, a a, below, and the iemporals, d d, on either side. They are of a closer and harder texture than the frontals, because they are more exposed to injury, and more con- cerned in defending the brain. A very small portion only of the parietals is naked, and that is com- posed of bone even harder than the other part, and with an additional layer of bone rising in the form of a crest or ridge externally. Every THE SEXSOKIAL FUXCTIOX, 147 utlier part of these bones is covered hj a thick mass of muscle, the iein- poral muscle, which is principally concerned in chewing the food, but Avhich lilvewise, by its yielding resistance, speedily and effectually breaks the force of the most violent blow. A woolpack hung over the wall of a fortress, when the enemy is battering to effect a breach, renders the hea%-iest artillery almost harmless. So the yielding resistance of the tem^ foral muscles affords a sui-e defence to the brain, however sudden or violent may be the blow which falls on the parietal. These benevolent provisions will not be disregarded by the reflecting mind. On the side of the head, and under the parietals (cZ d, p. 145) are the temporal hones, one on each side, //. These again are divided into two parts, or consist of two distinct bones ; the petrous portion, so called from its g-reat or stojuj hardness, and containing the wonderful mechanism of the ear, and the scpiavious portion from the appearance of its union witli the parietal, overlapping it like a great scale. From the latter there projects a portion of bone, e, which unites T\-ith the frontal, and forms a strong arch — the zygomatic — distinctly to be felt at the side of the head immediately above the eye. This arch is designed to protect the upper part of the lower jaw, the motion of which may very plainly be seen beneath it when the horse is feeding. It is very strong, and it ought to be, for if it were depressed or forced inward, the horse would starve. There is one species of violence which causes this arch to requii'e no common strength ; and that is, the brutal manner in which the collar is often forced over the head. At the base of the arch is an important cavity not visible in the cut, receiving into it, and forming a joint with, the head of the lower jaw — it Avill be presently described. Having reached the base of the temporal bone, it is found united to the parietal, not by a simple sutoi'e, as the lower part of the frontals, or the bones of the nose (see fig. a and j, p. 145), nor by a dove-tailed suture, as the upper part of the frontals (see the same cut), but it is spread over the parietal in the form of a large scale, and hence, as before observed, called the sqiiamous portion of the temporal bone. In fact, there are two plates of bone instead of one. "Was there design in this ? Yes, evidently so. In the first place, to increase the strength of the base of the zygomatic arch. This extensive union between the temporal and parietal bones resembles the buttress or mass of masonry attached to the base of every arch, Lu order to counteract its lateral pressure. The concussion, KkeA^-ise, which might be communicated by a blow on the tojD of the arch, is thus spread over a large fiui'face, and consequently weakened and rendered compai-atively harmless ; and that surface is composed of the union of tws bones of dissimilar construction. The hard stonij structure of the parietal is very different from the tougher material of the temporal ; and thus as a finger acts on a sounding glass, the ^-ibration communicated to the tem- poral is at once stopped, and the brain receives no injury. There is another proof of admirable design. "\Yhere is this squamous portion of the temporal bone situated ? On the side of the head. And what is the fig-ure of the cranium or skull, and principally that part of it which contains the cerebrum or brain ? It is an elliptical or oval arch. If pressure is made on the crown of that arch — if a blow is received on the siature between the parietals sufficient to cause the elastic materials ol which the skull is composed to yield — the seat of danger and injury is at the side. K a man receives a violent blow on the crown or back part of the head, the fracture, if there is any, is generally about the temple, and the extravasation of blood is oftenest f-^und there. The following figare wiU explain this : — l2 148 THE SENSORIAL FUNCTIOX. Let the line ABC represent an elliptical arcli, composed of elastic mate rials. Some force sliaU be applied at B sufficient to cause it to yield. We cannot compress it into smaller compass ; but just in proportion as it yields at B will it spur or bulge out at D, and give "way sometimes as represented at E. In a dome the "Weight of the materials constantly act- ing may be considered as representing the force applied at B ; and so gi-eat is the la- teral pressure, or tendency to bulge out (vide D and '£.), that it is necessary either to dove-tail the materials into one another, or to pass strong iron chains round them. For want of sufficient attention to this, ' the dome of St. Sophia, in Constantinople, built in the time ot the Emperor Justinian, fell three times dui-ing its erection ; and the dome of the cathedi-al of Florence stood unfinished a hundred and twenty years, for want of an architect.' Nature, in the constraction of the horse's head, has taken away the pressure, or removed the probability of injury, by giving an additional layer of bone, or a mass of muscle, where alone there was danger, and has dosre-tailed all the materials. Farther than this, in order to make assurance doubly sure, she has placed this effijctual girder at the base, in the overlapping of the squamous portion of the temporal bone. Above the parietals, and separated from them by a suture (fig. g, p. 145), is the occipital bone. Superiorly it covers and protects the smaller por- tion of the brain, the cerebellum ; and as it there constitutes the summit or crest of the head, and is particularly exposed to danger, and not protected by muscles, it is interesting to see what tliickness it assumes. The head of the horse does not, like that of the human being, ride upright on the neck, "with all its weight supported on the spinal column, the only office of the muscles of the neck being to move the head forward, or baclcward, or horizontally on its pivot ; but it hangs in a slanting position from the extremity of the neck, and the neck itself pro- jects a considerable distance fi-om the chest, and thus the whole weight of the head and neck are suspended from the chest, and requii'e very great power in order to support them. In addition to the simple weight of the head and neck, the latter projecting from the chest, and the head hanging from the extremity of the neck, act "with enormous mechanical force, and increase more than a hundredfold the power necessary to support them. The head and neck of the horse, and particularly of some horses of a coarse breed, are of no little bulk and weight. It "will hereafter be sho^vn nx what breeds and for what purposes a hght or heavy head and neck are advantageous ; but it may be safely affirmed that, projecting so far from the chest, and being conseqiiently at so great a distance from thefalcrum. or support, the lightest head "wiU act or bear upon the joint between the last bone of the neck and the first rib "with a force equal to many thousand pounds. How is this weight to be supported ? Is muscular power equal to the task ? The muscles of the animal frame can act for a certain time "with extraordinary force ; but as the exertion of this power is attended with the consumption of "vital energy, the period soon arrives when their action is remitted or altogether suspended. A provision, however, is made for the purpose, simple and complete. Prom the back of the occipital bone, and immediately below the crest, proceeds a round cord of considerable bulk, and composed of a ligamentous THE SEXSOEIAL FUNCTION. 14^ substance, which reaches down and is securely attached to the spines of the vertebrae, or bones of the back ; and by this ligament — the liga- mentimi colli, ligament of the neck, commonly called the ])aclauax — the head is supported. There are, however, some admirable contrivances connected with the arrangements of the llgavientum colli. As it proceeds from the head, it is in the form of a round cord. It is connected with the atlas, or first bone of the neck, and then, attaching itself stix)ngly to the second bone, principally supports the head by its union with this bone. The mechanical disadvan- tage is increased ; but the head is turned more freely on the first and second bones. The principal stress is on the clentata, or second bone, so much so, that, in poll-evil, this ligament may be divided "vvithout serious inconve- nience to the horse. It then suddenly sinks deeper, and communicates A\ath all the other vertebrae. Each of these commujiications becomes a separate point of support, and as they approach nearer to the base, the mechanical disadvantage, or the force mth which the weight of the head and neck presses and acts, is materially lessened. The head, then, while the animal is in a state of rest, is supported by this Hgament, AAdthout any aid from muscular energy. There is, however, something yet wanting. The head must not be always elevated. The animal has his food to seek. In a state of nature this food lies principally on the ground, and the head must be lowered to enable the horse to get at it. How is this effected ? This ligament, as it has been called, because it resembles in appearance the other Hgaments of the body, possesses a property which they have not, and which they must not have, or they would be useless. No well-knit joint could exist if it had this property. It is elastic. It will yield to a force impressed upon it, and A\'ill resume its natural dimensions when that force is removed. It sustains perfectly the weight of the head. That portion of tenacity or strength is given to it which \\il\ not give way to the simple weight of the head, but which ^'ill yield to a very httle additional weight. Its resisting power is so admii'ably adjusted to that which it has to sustain, that when certain muscles, whose action is to depress or lower the head, begin to act, and add their power to the previous weight it had to bear, the ligament stretches, and when the horse is brousing, it is fall two inches longer than when the head is erect. When the animal has satisfied himself, these depressing muscles cease to act, and other muscles which are designed to assist in raising the head, begin to exert themselves ; and by their aid — but more by the inherent elasticity of the ligaments— the head is once more elevated, and remains so vsdthout the slightest exertion of muscular power. This is one of the many applications of the principle of elasticity which will be discovered and admired in the constraction of the animal frame. The ligament of the neck is inserted into the centre of the back part of the occipital bone, and immediately below the vertex or crest of the bone ; and therefore the bone is so thick at this part. !Many large and powerful muscles are necessary to turn the head in various directions, as well as to assist in raising it when depressed. The occipital bone presents a spine mnning dowm the centi-e, and a large roughened surface for the attachment of muscles. Lower do-^vn, and still at the back of the occipital bone, are two rounded protuberances, by which the head is connected with the atlas, or upper or first vertebra, or bone of the neck ; and these are called the co7idyloid processes of the occipital bone. All the perpendicular motions of the head are performed by this joint. Between them is a large hole, the foramen magnum, or great apertui'e. 150 THE SEXSOKIAL FUNCTION. thi'ougli wliicli tlie contiBuation of the brain, termed tlie spinal cord or marrow, passes out of the skull. As an additional contrivance to support the enormous weight of the head, are two other projections of the occipital bone, pecuhar to animals whose heads are set ou in a slanting direction, and to which powerful muscles are inserted. They are called the coracoid, beak-like, processes? or prolongations of the occipital bone. Running forward, and forming outwardly a part of the base, and in- wardly a portion of the floor of the skull, is what, from its wedge-liko shajDe, is called the basilar process of the occipital bone. - It is thick, strong, and soUd, and placed at the bottom of the skull, not only to be a proper foundation for, and to give additional strength to the arch on either side, but speedily to stop all vibration and concussion. At the base of the skull, and anteiior to or below the occipital, lies the sjjhenoid, wedge-like bone. This bone branches out into four irregular bodies or plates, two of which are called the wings, and two running to the palate, the legs. There is nothing important belonging to them, so far as this work is concerned. Internally the sphenoid forms a portion of tho cavity of the skull. Of the ethmoid — sieve-like — bone, little can be seen outwardly. A small portion is found in the back part of the orbit and in the cavity of the cranium : but the most important part of it is that which is composed of a gTeat number of thin convoluted plates, forming numerous cavities or cells lined with the mucous membrane of the nose, and entering into its cavity. The upper portion is called the cribriform or sieve-shape plate, from its being perforated by a multitude of Httle holes, through which the nerve connected with smelling passes and spreads over the nose. Altogether these bones foi^m a cavity of an irregnilar oval shape, but tho tentorium stretching across it, gives it the appearance of being divided into two. The cavity of the skull may be said to be arched all round. The builder knows the strength which is connected -with the form of an arch. If properly constructed, it is equal to a soKd mass of masonry. The arch of the horse's skull has not much weight to support, but it is exposed to many injuries from the brutahty of those by whom he should be protected, and from accidental causes. The roof of the skull is composed of two plates of bone : the outer one hard and tough, and the different parts dove-tailed together, so as not to be easily fractui'ed ; the inner plate being elastic. By the union of these two substances of different construction, the vibration is lessened or destroyed, so far as safety requires. On raising any part of the skull of the horse, the dense and strong membrane which is at once the lining of the cranium and the coveiing of the brain — the dura mater — presents itself. Between this membrane, common to the cranium and the brain, and the proper investing tunic of that organ, is found that delicate gossamers' web appropriately called the arachnoid — the spider's membrane — and which is seen in other animals, desioned either to secrete the fluid which is interposed, for the purpose of obviating injurious concussion, or, perhaps, to prevent the brain fi'om. readily sympathisii:g "with any inflammatory action produced by injury of the skull. Beneath is the proper investing membrane of the brain — the pia mater —it is indeed the vascular membrane of the brain, being that through the medium of which the arteries convey the blood to the brain — which not only covers the external surface of the brain, but peneti^ates into every depression, and clothes every ii-regularity and part and portion of the brain. THE SENSORIAL FU.NXTIOX. 151 We now arrive at tlie brain itself. The brain of the horse corresponds with the cavity in which it is placed. It is a flattened oval. It is diWded into two parts, one much larger than the other — the cerebrum or brain, and the cerebellum or httle brain. In the human being the cerebrum ia above the cerebellum, in the quadi'uped it is below ; and yet in both they retain the same relative situation. The cerebellum is nearer to the fora- men through which the brain passes out of the skull, than the cerebrum, but portions from each unite to form the medulla oblongata, which passing out of the cavity of the cranium into the spinal canal, becomes the spinal cord. In the human head this foramen is at the base of the skull ; but in tha quadi'uped, in whom the head is placed slanting, it is necessarily elevated. He who for the first time examines the brain of the horse will be struck with its comparative diminutive size. The human being is not, generally speaking, more than one-sixth of the size and Aveight of the horse ; yet the brain of the biped is twice as large and as heavy as that of the quad- ruped. K it had been the brain of the ox that had been here exposed, it would have been but two-thirds of that of the horse. If the dog had been the subject, it would have been very considerably larger, comparing the general bulk of each animal. This is singular. The human brain largest in comparative bulk ; then the brain of the dog, the horse, the ox, TIlus would they he classed in the scale of intelligence. K the brain is more closely examined, it ^vill be obseiwed that there is not that roundness and broadness found in the human being ; it is comparatively level and flat. There is, however, sufiicient irregularity ot surface — there are projections and depressions to remind us that the phrenological development of the brain of the horse should not be lost sight of — his pride and love of approbation, his acute remembrance of persons and places, his perception of music and time are extraordinary. After the dog, there is no animal endowed with more intelligence than the horse. "Were the brain of the beaver, of the hare, or the rabbit, or of almost any bu-d, substituted for it, there would be no convolutions or irregularities at all. The irregularities on the surface of the brain are not so bold and so deep in the ox as in the horse, nor in the horse as in the dog. We do not know enough, as yet, of the functions of the particular portions of the brain to associate those convolutions, accurately, with any particular powers of mind, or good or bad propensities ; though, doubtless, such knowledge will ultimately be obtained. It would occupy two much space fully to enter into these questions ; but there are some diseases to which the horse is subject, for which a very useful operation — the division of some of the nerves — is had recourse to, the effect of which operation could not be understood without a previous sHght account of this important organ. When the brain is cut, it is found to be composed of tAvo substances very unlike in appearance ; one, principally on the outside, gi'ey, or ash- coloured, and therefore called the cortical (barh-lil-e) from its situation, and cineritio^is (aslien) from its colour ; and the other Ijing deeper in the brain, and from its pulpy nature called fho medullary substance. Although placed in apposition with each other, and seemingly mingling, they never run into the same mass, or change by degrees into one another, but are essentially distinct in construction as well as in function. "We are told by Mr. Solly, in his most valuable work on the brain, that the cineritious or dark portion of the brain is the source of mental power — that is, it is the portion of the brain by means of wliich the mind or instinct developes itself; that it is collected in masses of variable form and shape, both AATithin and without the brain, called ganglia, and that these ganglia are the immediate means of mental demonstration, while the medullary or white portion 152 THE SENSORIAL FUNCTION. of the brain, has the secondary ofUce of being the conductor of tliat demonstration to every part of the body, it is not developed in the form of irregular masses or ganglia, but is moulded into the more symmetrical form of nerves. The medullary portion is connected with the nervous system. The nerves are prolongations of it, and are concerned in the discharge of all the offices of life. They give motion and energy to the limbs, the heart, the lungs, the stomach, and every part connected ^Yit}l Hfe. They are the medium through which sensation is conveyed ; and they supply the mind with materials to think and work upon. The cinerltious part has a different appearance, and is differently con- stituted. Some have supposed, and with much appearance of truth, that it is the residence of the mind — receiving the impressions that are con veyed to the brain by the sensitive nerves, and directing the operation and action of those which give motion to the limbs. In accordance with this, it happens that, where superior inteUigence is found, the cineritious por- tion prevails, and where little beside brute strength and animal appetite exists, the medullary portion is enlarged. There is, comparing bulk with bulk, lees of the medullary substance in the horse than in the ox, and in the dog than in the horse. The additional bulk of brain is composed of cineritious matter ; and how different is the character of these animals ? — the sluggish, stupid ox, and the intelligent horse ; the silly sheep, and tho intellectual companionable dog ! In a work Hke this, it would be somewhat out of place to enter deeply into any metaphysical speculation ; but the connexion between the cineri- tious part of the brain and the intellectual principle, and that between the medullary portion and the mere animal principle, do seem highly probable. The latter is the medium through which the impression is conveyed, or the motion is effected ; the former is the substance to which that impres- sion is referred — where it is received, registered, and compared, and by which the operation of the motor nerves is influenced and governed. The cortical substance is small in the quadruped ; for in their wild state brutes have no concern and no idea beyond their food and reproduction ; and in their domesticated state they are destined to be the servants of man. The acuteness of their senses, and the preponderance of animal power, qualify them for these purposes ; but were proportionate intellectual capa- city added to this — were they made conscious of their strength, they would burst their bonds, and man would, in his turn, be the victim and the slave. The cortical part is found in each in the proportion in which it Avould seem to be needed for our purpose, in order that intelligence should be added to animal power. Almost every mental faculty, and almost every virtue, too, may be traced in the brute. The difference is in degree, and not in kind. The one being improved by circumstances and the other contaminated, the quadruped is decidedly the superior. From the medullary substance — as already stated — proceed certain cords or prolongations, termed nerves, by which the animal is enabled to receive impressions from surrounding objects, and to connect himself with them ; and also to possess many pleasurable or painful sensations. One of them is spread over the membrane of the nose, and gives the sense of smell ; another expands on the back of the eye, and the faculty of sight is gained ; and a third goes to the internal structure of the ear, and the animal is conscious of sound. Other nerves, proceeding to different parts, give the faculty of motion, while equally important ones bestow the power of feeling. One division of nerves springing from a prolongation of the brain, wanders to different parts of the fram 3, for important purposes connected THE SENSORIAL FUXCTIOX. 153 with respiration or breathing. The act of breathing is essential to hfo, and were it to cease, the animal would die. These are nerves of iiivoluu- tarij motion ; so that, whether he is awake or asleep, conscious of it or not, the lungs heave and life is supported. Lastly, extending from the medulla ob- longata is the spinal cord — a further prolonga- tion of the brain, running through a cavity in the bones of the neck, back, and loins, and extending to the sacral canal— from which other nerves are given off at certain intervals. This cut delineates a pair of them. The portion of spinal cord represented, is supposed to be placed with its inner or lower surface towards us. The spinal cord, a, is composed of six distinct divisions or rods, running through its whole length — three on either side. The two upper divisions proceed from those tracks of the brain devoted to sensation. Numerous distinct fibres spring abruptly from the column, and which collect together, and, developing a little ganglion or enlargement, d — an enlargement of a nervous cord is called a ganglion-^become a nerve of sensation. From the lower or inner side — a prolongation of the track devoted to motion — proceed other fibres, which also collect gradually together, and form a nervous cord, c, giving the poAver of motion. Beyond the ganglion the two unite, and form a perfect spinal nerve, &, possessing the power both of sensation and motion ; and the fibres of the two columns proceed to their destination, enveloped in the same sheath, and apparently one nerve. Each portion, however, continues to be wrapped in its own membrane. They are united, yet distinct ; they constitute one nerve, yet neither their substance nor their office is confounded. Our cut, closely examined, will give at h some idea of the manner in which these distinct fibres are continued ; — each covered by its own membrane but all enveloped in a common envelope. The difference of action in the sentient and motive portions of the nerves must not be lost sight of ; in the sentient, the im- pression commences in the minute ramifications of the nerve, and is carried on through the trunk to the sensorium : while, on the contrary, in the motor, the volition originates in the brain itself, and is communicated to the muscles ; the impression in the sentient nerves traversing from the tissues to the brain, and m the motor from the brain to the tissues. All these nerves are organs of sensation and motion alone ; but there are others whose origin seems to be outside of and below the brain. These are the si/mpathefic, so called from their union and sympathy with all the others, and identified with life itself. They arise from a small enlargement, called the anterior cervical ganglia, in the upper part of the neck, and are more or less distributed over every part of the body. They go to the heart, and its beats ; and to the stomach, and it digests. They form a network round each blood-vessel, and the current flows on. They surround the very minutest vessels, and the frame is nourished and built up. They are destitute of sensation, and they are perfectly beyond the control of the will. The reader, we trust, will now comprehend this wonderful yet simple machinery, and be able, by-and-by, to refer to it the explanation of several diseases, and particularly of the operation to which we have referred. 154 Ttffi SEXSOllIAL FUXXTIOX. They who know anything of the horse pay much attention to the size, setting' on, and motion of the ear. Ears rather small than large — ^jilaced not too far apart — erect and quick in motion, indicate both breeding and spirit ; and if a horse is frequently in the habit of carrying one ear forward and the other backward, and especially if he does so on a journey, he \viU generally possess both spii'it and continuance. The stretching of the ears in contrary directions shows that he is attentive to everything that is taking place around him, and, while he is doing this, he cannot be much fatigued, or likely soon to become so. It has been remarked that few horses sleep without pointing one ear forward and the other backward, in order that they may receive notice of the approach of objects in every direction. ' When horses or mules,' says Dr. Ai'nott, in his ' Elements of Physic,' ' march in company at night, those in front du'ect their ears for- wards ; those in the rear direct them backwards ; and those in the centre turn them laterally or across ; the whole troop seeming thus to be actuated by one feeling, which watches the general safety.' The ear of the horse is one of the most beautiful parts about him, and by few things is the temper more surely indicated than by its motion. The ear is more intelligible even than the eye ; and a person accustomed to the horse, and an observer of him, can tell by the expressive motion of that organ almost all that he thinks or means. It is a common saying, that when a horse lays his ears fiat back upon his neck, and keeps them so, he most assuredly is meditating mischief, and the stander by should beware of his heels or his teeth. In play, the ears will be laid back, but not so decidedly or so long. A quick change in their position, and more particularly the expression of the eye at the time, will distinguish between playfulness and vice. The external ear is formed by a cartilage of an oval or cone- like shape, flexible, yet firm, and terminating in a point. It has, directed towards the side, yet somewhat pointing forward, a large opening extending from the top to the bottom. The intention of this is to collect the sound, and convey it to the interior part of the ear. The hearing of the horse is remarkably acute. A thousand vibrations of the air, too slight to make any impression on the human ear, are readily ]ierceived by him. It is weU known to every hunting man, that the cry of the hounds will be recognised by the horse, and his ears will be erect, and he ^vill be all spirit and impatience a considerable time before the rider is conscious of the least sound. This custom of cutting the ears of the horse originated, to its shame, in Great Britain, and for many years was a practice not only cruel to the animal, but depriving him also of much of his beauty ; and was so obsti- nately pursued, that at length the deformity became in some hereditary, and a breed of horses born without ears was produced. Fortunately for this too-often abused animal, cropping is not now the fashion. Some thoughtless or unfeeling young men endeavoured, a Httle while ago, again to introduce it, but the voice of reason and humanity prevailed. This cartilage, the conch or shell, is attached to the head by ligaments, and sustained by muscles, on which its action depends. It rests upon another cartilage, round without and irregular within, called the annular, ring-like, cartilage, and conducting to the interior of the ear ; and it is likewise supported and moved by a third small cartilage, placed at the fore part of the base of the conch, and into which several muscles are inserted. The ear is covered by skin thinner than in most other parts of the body, and altogether destitute of fat, in order that it may not be too bulky and heavy, and may be more easily moved. Under the skin lining the inside THE SEXSOKIAL FUXCTIOX. 156 of the cartilage are numerous glands that secrete or throw out a scaly white greasy matter, which may be rubbed off by the finger, and ia destined to supple this part of the ear, and to keep it soft and smooth. Below this ai'e other glands, which pour out a peculiar, sticky, bitter fluid — the wax — probably displeasing to insects, and therefore deten-ing them from crawling down the ear and annoying the animal, or by its stickiness arresting their progress. The internal part of the conch is covered -with long harr, which stands across the passage in eveiy direction. This likewise is to protect the ear from insects, that can with difficulty penetrate thi-ough this thick defence. The cold au* is likewise prevented from reaching the interior of the ear, and the sound is moderated, not arrested — penetrating readily but not violently — and not striking injui'iously on the membrane covering the drum, of the ear. Can these purposes be accomplished when it is the custom of so many carters and gi'ooms to cut out the hair of the ear so closely and industriously as they do ? The groom who singes it to the root ■s\dth a candle must either be very ig-norant or very bmtal. It can scarcely be accomphshed "udthout singeing the ear as "well as the hair. Many a troublesome sore is occasioned by this ; and many a horse that was perfectly quiet before rendered difficult to handle or to halter, and even disposed to be other^wise vicious, from a recollection of the pain ■wliich he suffered during the absurd and barbarous operation. The sound collected by the outer ear passes thi'ough the lower or annular, ring-shaped cartilage, and through irregTilarities which, while they break and modify it, convey it on to another canal, partly cartilagi- nous and partly bony, conducting immediately to the internal mechanism of the ear. This canal or passage is called the external auditory passage, and at the base of it is placed, stretching across it, and closing it, a thick and elastic membrane, memhrana tymioani, called the membrane of the drum. This membrane is supphed ■\\"ith numerous fibres, from the fifth pair, or sensitive nerve of the head, for it is necessary that it should pos- sess extreme sensibility. Between this membrane and a smaller one almost opposite, leading to the still interior part of the ear, and on which the nerve of hearing is ex- panded, are four little bones, united to these membranes and to each other. Their office is to convey, more perfectly than it could be done through the mere air of the cavity, the vibrations that have reached the membrana tympani. These bones are conjiected together, and are covered by a cartilaoinous substance, elastic in the greatest degree, by means of which the force of the vibration is much increased. It is conveyed to a strangely ii'regular cavity, filled with an aqueous fluid, and the substance or pulp of the portio mollis or soft portion of the seventh pair of nerves, the auditory nerve, expands on the membrane that lines the walls of this cavity. Sound is propagated far more intensely through water than through air, and therefore it is that an aqueous fluid occupies those chambei's of the ear on the walls on Avhich the auditory nen'e is expanded. By this contrivance, and by others, which we have not space now to nar- rate, the sense of hearing is fully equal to every possible want of tho animal. The Eye is a most important organ, and comes next under considera- tion, as enclosed in the bones of the skull. The eye of the horse should be large, somewhat but not too prominent, and the eyehd fine and thin. If the eye is sunk in the head, and apjJarently little — for there is actually a very trifling difference in the size of the eye in animals of the same species itjG THE SENSOKIAL FU^X'TION. and bulk, and that seeming difference arises from the larger or smallei opening between the lids — and the hd is thick, and especially if there is any puckering towards the inner corner of the Hds, that eye either is diseased, or has lately been subject to disease ; and, particularly, if one eye is smaller than the other, it has at no gi'eat distance of time becm inflamed. The eye of the horse enables us with tolerable accuracy to guess at his temper. If much of the white is seen, the buyer should pause ere he com- pletes his bargain ; because, although it may, yet very rarely, happen that the cornea or transparent part is unnaturally small, and therefore an un- usual portion of the white of the eye is seen, experience has shown that this display of white is dangerous. The mischievous horse is slyly on the look out for opportunities to do mischief, and the frequent backward direc- tion of the eye, when the white is most perceptible, is only to give surer effect to the blow which he is about to aim. A cursory description of the eye, and the uses of its different parts, must be given. The eyes are placed at the side of the head, but the direction of the conoid cavity wliich they occupy, and of the sheath by which they are surrounded Tvdthin the orbit, gives them a prevailing direction forwards, BO that the animal has a very extended field of vision. We must not assert that the eye of the horse commands a whole sphere of vision ; but it cannot be denied that his eyes are placed more forward than those of cattle, sheep, or swine. He requires an extensive field of vision to warn him of the approach of his enemies in his wild state, and a direction of the orbits considerably forward, in order to enable him to pursue with safety the headlong course to which we sometimes urge him. The eyeball is placed in the anterior and most capacious part of the orbit, nearer to the frontal than the temporal side, wdth a degree of promi- nence varying with different individuals and the will of the animal. It is protected by a bony socket beneath and on the inside, but is partially exposed on the roof and on the outside. It is, however, covered and secured by thick and powerful muscles — by a mass of adipose matter which is distributed to various -parts of the orbit, upon which the eye may be readily moved without friction, and by a sheath of considerable density and firmness, and especially where it is most needed, on the external and superior portions. The adipose matter exists in a considerable quantity in the orbit of the eye of the horse, and enables that organ readily to revolve by the slightest contraction of the muscles. By the absorption of this fatty matter in sickness or old age, the eye is not only to a certain degree sunk in the orbit, but the roof of the orbit posterior to the frontal bone, being deprived of its support, is considerably depressed. In front the eye is covered and protected by the lids, which, closing rapidly, secure it from many an injury that threatens — diffuse over it that moisture which is necessary to preserve its transparency — in the momentary act of closing give a certain and sufficient respite to a delicate organ, which would otherwise be fatigued and worn out by the constant glare of day — defend it when the eye labours under inflammation from the stimulus of light — and, gradually drooping, permit the animal to enjoy that repose which nature requires. Extending round both lids, and, it may be almost said, ha\'ing neither origin nor insertion, is a muscle called the orhicularis palpebrarum, or circular muscle. Its office is to close the Hds in the act of winking or otherwise, but only while the animal is awake. When he sleeps this is effected by another and very ingenious mechanism. The natural state of THE SENSORIAL FUXCTIOX. J 57 the eyelids is that of being closed, and they are kept open by the energy of the muscles Avliose office it is to raise the upper lid. As sleep steals upon the animal, these muscles cease to act, and the lids close by the inherent elasticity of the membrane of ^vhicb tbey are composed. The skin of the lid is, like that of the ear, exceedingly fine, in order to prevent unnecessary weight and pressxu-e on such a part, and to give more easy and extensive motion. The Kds close accurately when dra^vn over the eye, and this is effected by a little strip of cartilage at the edge of each of them, which may be easily felt vriih the finger, and preserves them in a hooplike form, and adapts them closely to the eye and to each other. The lower cai-tilage, however, does not present, towards the inner corner of the eye, the whole of its flat surface to the upper, but it evidently <5lopes inward, and only tlie outer edge of the under hd touches the upper. By this means a little gutter is formed, through which the superfluous moisture of the eye flows to the inner corner, where there is a canal to convey it away. By this contrivance it neither accumulates in the eye nor unpleasantly runs down the cheek. Along the edges of the hds are placed numerous httle hollows, which can be plainly distinguished even in the living horse by shghtly turning doAvn the hd. These are the openings from the meibomian or ciliary glands containing a thick and unctuous fluid, by means of which the eyes are more accurately closed, and the edges of the Hds defended from the acrimony of the tears. The horse has no eyebrows, and the eijelashes are very pecuharly ar- ranged. The rows of hair are longest and most numerous on the upper lid, and especially towards the outer or temporal comer, because the hght comes from above ; and, as the animal stands, particularly when he is grazing, and from the lateral situation of his eyes, the gi-eater portion of the hght, and the attacks of insects, and the rolling down of moisture, would chiefly be fi-om the outside or temples. Towards the inner comer of the upper hd there is httle or no eyelash, because there is no probable danger or nuisance in that direction. Only a small quantity of hght can enter from below, and therefore the lashes are thin and short ; but as, in the act of grazing, insects may more readily climb up and be troublesome to the eye, towards the inner angle, there the pi-incipal or only hair is found on the lower hd. These apparently trifling circumstances will not be overlooked by the careful observer. They who are unacquainted with the absurdities of stable management, or who have not carefully examined the abuses that may exist in their own estabhshments, can scarcely beheve the foohsh and cruel practices of some carters and grooms. When the gTOom is anxious that his horse should be as trim and neat all over as art can make him, the very eyelashes are generally sacrificed. What has the poor animal sufiered, when, travelling in the noon of day, the fall blaze of the sun has fallen upon his eyes ; and how many accidents have probably happened from his being dazzled by the hght, which have been attributed to other causes ! K the horse has no eyebrow, there are several hairs or bristles scattered on the upper eyehd, and there is a projecting fold of the lid which dis- charges nearly the same office. It is more conspicuous in old horses than in young ones. Some horsemen do not like to see it, and associate the idea of it with weakness or disease of the eye. This is perfectly erroneous. _ It is a proArision of nature to accomplish a certain pm-pose, and has nothing to do either with health or disease. On the lower hd is a useful provision to warn the horse of the near approach of any object that might incommode or injure him, in the form of long projecting hairs or bristles, which are plenteously iinbued with l';8 ^ THE SEXSORIAL FUNCTION nervous influence, so that the slightest touch sliould put the animal on his guard. We would request our readers to touch very slightly the extremity of one of these hairs. They will be surprised to observe the sudden con- vulsive twitching of the lid, rendering the attack of the insect absolutely impossible. The grooms, however, who cut away the eylashes, do not spare these useful feelers. The eye is exposed to the action of the atmospheric air, and the process of evaporation, destructive of its transparency, is continually goin"- on. The eye of the horse, or the visible part of the eye, is, lilce-wdse, more prominent and larger than in the human being, and the- animal is often subject to extreme annoyance from dust and insects, while he has no hands or other guard to defend himself from the torture which they occa- sion. Wliat is the provision of nature against this ? Under, and a little within, the outer comer of the upper lid, is an irregular body, the lachry- mal gland, comparatively larger than in the human being, secreting au aqueous fluid, which, slowly issuing from the gland, or occasionally pressed out of it in the act of winking, flows over the eye, supphes it -with moisture, and cleanses it from all impurities. Human ingenuity could not have se- lected a situation from which the fluid could be conveyed over the eye uith more advantage for this purpose. \VTien this fluid is secreted in an undue quantity and flows over the eye, lb is called tears. An increased flow of tears is produced by anything that ii'ritates the eye, and, therefore, a constant accompaniment and symptom of inflammation. A horse with any degree of weeping should be regarded Avith much suspicion. In the human being an unusual secretion of tears is often caused by bodily pain, and emotions of the mind ; and so it is occasionally in the horse. We have seen it repeatedly under acute pain or brutal usage. John Lawi'ence, speaking of the cruelty exercised by some dealers in what they call ' firing ' a horse before he is led out for sale, in order to rouse every spark of mettle, says, ' more than fifty years have passed away, and I have before my eyes a poor mare stone bhnd, exquisitely shaped, and showing all the marks of high blood, whom I saw unmercifully cut -watli the whip a quarter of an hour before the sale, to bring her to the use of her stiffened limbs, wlcile the tears were tricldinn doivn her clieeJcs.' Having passed over the eye, the fluid is conveyed by the little canal to which we have alluded, formed by the sloping of the under hd, towards the corner of the eye ; and there are two httle orifices that conduct it to a small reservoir %vithin, and at the upper part of the lachrymal bone (fig i, p. 145). A httle protuberance of a black or pied colour, called the caruncle, placed in the very corner of the eye, and to be seen vnthout opening the lids, is situated between these orifices, and guides the fluid into them. From this reservoir the tears are conveyed by a long canal, the lachrymal duct, partly bony, and partly membranous, to the lower part of the nose. A little -wilihin the nostril, and on the division between the nostrils, is seen the lower opening of this canal ; the situation of which should be carefully observed, and its real iise borne in mind, for not only horsemen, but even some careless veterinary sirrgeons, have mistaken it for a glanderous ulcer, and have condemned a useful and valuable animal. It is found just before the skin of the muzzle terminates, and the more dehcate membrane of the nostril commences. The opening of the canal is placed thus low because the membrane of the nose is exceedingly dehcate, and would be irritated and made sore by the frequent or constant running doMTi of the tears. TJierc is, however, something yet wanting. We have a provision for siupplj-ing the eye with reauisite moisture and forwasliing from ofl" the THE SE.NSOKIAL FUNCTION. l/)9 transparent part of it insects or dust that may annoy the animal. W^(:at becomes of these impurities when thus washed off ? Ai'e they carried by the tears to the comer of the eye, and so pass down this duct, and irritate and obstruct it ; or do they accumulate at the inner angle of the eye ? Q'"hcre is a beautiful contrivance for disposing of them as f\xst as they accu- mulate Concealed "within the inner corner of the eye, or just at the margin of it, black or pied, is visible a triangular- shaped cartilage, the haw, svith its broad part forwards. It is concave within, exactly to suit the globe of the eye ; it is convex ■without, accurately to adapt itself to the membrane lining the lid ; and the base of it is reduced to a thin or almost sharp edge. At the ^vill of the animal this is suddenly protruded from its liiding-place. It passes rapidly over the eye, and shovels up every nuisance mixed Avith the tears, and then being speedily drawn back, the dust or insect is wiped away as the cartilage again passes under the comer of the eye. How is this managed ? The cartilage has no muscle attached to it ; and the limbs and the different parts of the body, when put into motion by the influence of the will, are moved invariably by muscles. The mechanism, however, is simple and effectual. There is a considerable mass of fatty matter at the back of the eye, in order that this organ may be easily moved ; and this fat is particularly accumulated about the inner corner of the eye, and beneath, and at the point of this cartilage. The eye of the horse has likewise very strong muscles attached to it, and one, pecuHar to quadrupeds, of extraordinary power, by whose aid, if the animal has not hands to ward off a danger that threatens, he is at least enabled to draw the eye back almost out of the reach of that danger. Dust, or gravel, or insects, may have entered the eye, and annoy the horse. This muscle suddenly acts : the eye is forcibly di-a^vn back, and presses upon the fatty matter. That may be displaced, but cannot be reduced into less compass. It is forced violently towards the inner comer of the eye, and it drives before it the haw ; and the haw, having likeAvise some fat about its point, and being placed between the eye and an exceed- ingly smooth and polished bone, and being pressed upon by the eye as it is violently di'aAvn back, shoots out with the rapidity of lightning, and, guided by the eyelids, projects over the eye, and thus carries off the offending matter. In what way shall we draw the haw back again without muscular action ? Another principle is called into play, of which mention has ah'eady been made, and of which we shall have much to say — elasticity. It is that principle by which a body yields to a certain force impressed upon it, and returns to its former state as soon as that force is removed. It is that by which the Hgament of the neck (p. 153), while it supports the head, enables the horse to graze — by which the heart expands after closing on and propelhng forward the blood In its ventricles and the artery contracts on the blood that has distended it, and many of the most important functions of life are influenced or governed. This muscle ceases to act, and the eye resumes its natural situation in the orbit. There is room for the fatty matter to ret;uTi to its place, and it immediately returns by the elasticity of the' membrane by which it is covered, and draws after it this cartilage with which it is connected, and whose return is as rapid as was the projection. The old farriers strangely misunderstood the nature and design of the haw, and many at the present day do not seem to be much better informed. "Wlien, from sympathy with other parts of the eye labouring under in- fiarOi:.iuation, and becoming itself inflamed and increased in bulk, and the neighboring iiarts likewise thickened, it is either forced out of its place, IGO THE SEXSORIAL FUXCTIOX. or voluntarily protruded to defend the eye from the action of light, and cannot return, they mistake it for some injurious excrescence or tumour, and proceed to cut it out. The ' Imiv in the eye ' is a disease "well known to the majority of grooms, and this sad remedy for it is deemed the only cure. It is a barbarous practice, and if they were compelled to walk half a dozen miles in a thick dust, without being permitted to wipe or to cleanse the eye, they would feel the torture to which they doom this noble animal. A little patience having been exercised, and a few cooling applications made to the eye while the inflammation lasted, and afterwards some mild astringent ones, and other proper means being employed, the tumour would have disappeared, the haw would have returned to its place, and the animal would have discharged the duties required of him without inconvenience to himself, instead of the agony to which an unguarded and unprotected eye must now expose him. The loss of blood occasioned by the excision of the haw may frequently relieve the inflammation of the eye ; and the evident amendment which follows induces these wise men to believe that they have performed an excellent operation ; but the same loss of blood by scarification of the over- loaded vessels of the conjunctiva, would be equally beneficial, and the animal would not be deprived of an instrument of admirable use to him. The eye is of a globular figure, yet not a perfect globe. It is rather composed of parts of two globes ; the half of one of them smaller and transparent in front, and of the other larger, and the coat of it opaque, behind. We shall most conveniently begin with the coats of the eye. A B a supposed object viewed by the animal, and an inverted image of which, a, h, is thrown on the retina at the back of the eye. The rays proceeding from the extremities of the object to the eye. The points where the rays, having passed the cornea and lens, converge by the refractive power of the lens. The cornea, or horny and transparent part of the eye, covered by the conjunctiva, uniting different parts together. The crystalline (crystal or glassy) lens, behind the pupil, and in front of the vitreous humour. Muscles of the eye. The optic nerve, or nerve of sight. The sclerotica (hard firm coat) covering the whole of the eye except the portion occupied by the cornea, and being a seeming prolongation of the covering of the optic nerve. The choroides (receptacle or covering), or choroid coat, covered with a black secretion or paint. The iris or rainbow-coloured circular membrane under the cornea, in front of the eye, and on which the colour of the eye depends. The duplicature behind is the uvea, from being coloured like a grape. The opening in the centre is the pupil. The ciliary (hair-like) processes. The retina, or net-like expansion of the optic nerve, spread over the whole of the choroides as far as tlie kns. The vitreous (glass-like) humour filling the whole of the cavity of the eye behind the leHS. The aqueous (water-like) humour filling the space between the cornea and the lens. d e c c f 9 hh TV THE SENSORIAL FUNCTION. 161 The corrjundivaf f, is that membrane which lines the lids, and covers the fore part of the eye. It spreads over all that we can see or feel of the eye, even its transparent part, and is then reflected over the internal surface of the lid. It is itself transparent, and transmits the colour of the parts beneath. It is very susceptible of inflammation, during "which the lining of the Hds will become intensely red, and the white of the eye will be first streaked with red vessels, and then covered with a complete mesh of them, and the cornea will become cloudy and opaque. It is the seat of various diseases, and, particularly, it first announces that sad inflammation of the horse's eye, which bids defiance to the veterinary sui'geon's skill and almost invariably terminates in bHndness. The examination of the conjunctiva, by turning down the hd, will en- able us to form an accui'ate judgment of the degree of inflammation which exists in the eye. Covering the back part of the eye, and indeed four-fifths of the globe of it, is the sclerotica, Ic. It is an exceedingly strong membrane, composed of fibres interweaving with each other, and almost defying the possibiHty of separation. An organ so delicate and so important as the eye, requires secure protection. It is to a certain extent comparatively inelastic. It is necessary that it should be so, when it is considered that the eye is surrounded by several very powerful muscle?, which must temporarily, and even for the purposes of vision, alter its form. The slight elasticity of the sclerotica is usefiiUy developed in causing the globe of the eye to resume its former and natural shape, as soon as the action of the muscle ceases. The sclerotica has very few blood vessels — is scarcely sensible — and its diseases, except when it participates in general disturbance or disorganisa- tion, are rarely brought under our notice. The cornea is, or we should wish it to be, the only visible part of the horse's eye, for the exhibition of much white around it is a frequent symptom of wickedness. The cornea fills up the vacuity which is left by the sclerotica in the fore part of the eye, and, although closely united to the sclerotica, may be separated from it, and will drop out like a watch- glass. It is not round, but wider from side to side than from the top to the bottom ; and the curve rather broader towards the inner than the outer comer of the eye, so that the near eye may be known from the off" one after it is taken from the head. The convexity or projection of the cornea is a point of considerable importance. The prominence of the eye certaiuly adds much to the beauty of the animal, but we shall see presently, when we consider the eye as the organ of sight, that by being too prominent, the rays of hght may be rendered too convergent, and the vision indistinct ; or, if the cornea is small and flat, the rays may not be convergent enough, and perfect vision destroyed. In either case the horse may unpleasantly start, or suddenly and dangerously turn round. An eye neither too prominent nor too flat will be nearest to perfection. It should be perfectly transparent. Any cloudiness or opacity is the consequence of disease. It is an exceedingly firm and dense membrane, and can scarcely be pierced by the sharpest instrument. The cornea is composed of many different plates, laid over one another ; and between each, at least in a state of health, is a fluid that is the cause of its trans- parency, and the evaporation of which, after death, produces the leaden or glazed appearance of the eye. When it appears to be opaque, it is not often, and never at first, that the cornea has undergone any change. Within the sclerotica, and connected vsdth it by innumerable minute fibres and vessels, is the choroid coat, I. It is a very deHcate membrane, M 162 THE SENSORIAL FUNCTION. and extends over nearly the whole of the internal part of the eye, froni the optic nerve to the cornea. It secretes a dark-coloured suhstance or paint, by which it is covered ; the intention of which, like the inside of our telescopes and microscopes, is probably to absorb any wandering rays of light which might dazzle and confuse. The black paint, pigmenium nigrum, seems perfectly to discharge this function in the human eye. It is placed immediately outside the retina or expansion of the optic nerve. The rays of hght fall on the retina, and penetrating its deHcate substance, are immediately absorbed or destroyed by the black covering of the cho- roides underneath. For the perfection of many of his best pleasures, and particularly of his intellectual powers, man wants the vivid impression which will be caused by the admission of the rays of Hght into a pex'fectly dark chamber ; and when the Hght of the sun begins to fail, his superior intelhgence has enabled him to discover various methods of substituting an artificial day, after the natural one has closed. Other animals, without this power of kindling another, although inferior hght, have far more to do with the night than we have. Many of them sleep through the glare of day, and are awake and busy during the period of darkness. The ox occupies some hours of the night in grazing ; the sheep does so when not folded in his pen ; and the horse, worked during the day for our conve- nience and profit, has often Httle more than the period of night allotted to Viim for nourishment and repose. It is necessary then that, by some pecuHar and adequate contrivance, these hours of comparative or total darkness to us should be partially yet sufficiently illuminated for them ; and therefore, in the horse, the dark-brown or black coat of the choroides does not extend over the whole of the internal part of the eye, or rather it is not found on any part on which the rays proceeding from the objects could faU. It does not occupy the smallest portion of what may be called the field of vision ; but, in its place, a bright variegated green is spread, called the tapektm lucidum, and more over the upper part than the lower, because the animal's food, and the objects which it is of consequence for him to notice, are usually below the level of his head — thus, by suffering the impression to remain longer on the retina, or by some portion of hght reflected from this variegated bed on which the retina reposes, or in some other inexphcable but efficient way, enabhng the animal, even in compa- rative darkness, to possess a power of vision equal to his wants. The reader may see in the dusk, or even when duskiness is fast yielding to utter darkness, the beautiful sea-green reflection from the eye of the horse. It is that lucid variegated carpet of which we are now speaking. Who is unaware that in the fading ghmmering of the evening, and even in the darker shades of night, his horse can see surrounding objects much better than his rider : and who, resigning himself to the guidance of that sagacious and faithful animal, has not been carried in safety to his jour- ney's end, when he would otherwise have been utterly bewildered ? K the reader has not examined this beautifal pigment in the eye of the horse, he should take the earhest opportunity of doing so. He will have a beautiful illustration of the care which that Being who gave all things life has taken that each shall be fitted for his situation. The horse has not the intelligence of man, and may not want for any purpose of pleasure or improvement the vivid picture of surrounding objects which the retina of the human being presents. A thousand minute but exquisite beauties would be lost upon him. K, therefore, his sense of vision may not be so strong during the day, it is made up to him by the increased power of vision in the night. Perfectly white and cream-coloured horses have a pecuHar appearance of the eyes. The pupil is red instead of black. There is no black paint or THE SENSORIAL FUNCTION. 163 brilliant carpet. It is the choroid coat itself wLich we see in them, and not its covering ; and the red appearance is caused by the numerous blood- vessels which are found on every part of that coat. "Wlien we have to treat of other domestic animals, we shall see how this carpet is varied in colour to suit the situation and necessity of each. In the ox it is of a dark green. He has not many enemies to fear, or much difficulty in searching for noui'ishment, and the colour of the eye is adapted to his food. In the cat and all his varieties it is yellow. We have heard of the eyes of the lion appearing like two flaming torches in the night. There are few of our readers who have not seen the same singular glare from the eyes of the domestic cat. In the wolf, and likewise in the dog, who, in his wild state, prowls chiefly at night, it is gi'ey. In the poor unjustly-persecuted badger, who scarcely dares to crawl forth at night, although sheltered by the thickest darkness, it is white ; and the ferret, who is destined to hunt his prey through all its winding retreats, and in what would be to us absolute darkness, has no paint on the choroides. Tracing the choroides towards the fore part of the eye, we perceive that it is reflected from the side to the edge of the lens, n, and has the appear- ance of several plaits or folds. They are actually foldings of the membrane. It is not diminished in size,. but it has less space to cover, and there must be duphcatures or plaits. They are usefully employed in the place in which we find them. They prevent the passage of any rays of Hght on the outside of the lens, and which, proceeding forAvard in various directions, and uncondensed by the power of the lens, would render vision confused or imperfect. These folds of the choroides are called the ciliary processes. Occupying the fore part of the eye, is the aqueous humour, q, so termed fix)m its resemblance to pure water. It is that by which the comea is pre- served in its protuberant and rounded form. It extends to the crystalline lens, g, and therefore a portion of it, although a very small one, is behind the iris. Floating in this fluid is a membrane, with an oblong aperture, called the Iris (m, p. 160). It is that which gives colour to the eye. The human eye is said to be black, or hazel, or blue, according to the colour of this membrane or curiain ; and it is denominated the iris, or rainbow, from its beautiful, intermingling hues. The colour varies Httle in the horse, except that it always bears some analogy to that of the skin. We rarely see it lighter than a hazel, or darker than a brown. Horses per- fectly white, or cream-coloured, have the iris white and the pupil red. When horses of other colours, and that are usually pied, have a white iris and a black pupil, they are said to be wall-eyed. Vulgar opinion has decided that a wall-eyed horse is never subject to blindness, but this is altogether erroneous. There is no difference of structure that can produce this exemption ; but the wall-eyed horse, from this singular and unpleasant appearance, and his frequent want of breeding, may not be so much used and exposed to many of the usual causes of inflammation. The aperture in the iris is termed the pupil, and through it Hght passes to the inner chamber of the eye. The pupil is oblong, and variable in size. It differs with the intensity or degree of Hght that faUs upon the eye. In a dark stable the pupil is expanded to admit a great proportion of the Hght that falls upon the cornea ; but when the horse is brought towards the door of the stable and more Hght is thi'own upon the eye, the pupil contracts in order to keep out that extra quantity which would be painful to the animal, and injurious to vision. When opposed directly to the sun, the aperture will almost close. Tins alteration of form in the pupil is effected by the muscular fibres that enter into the composition of the iris. There are two orders of these fibres, the circular and the straight or radiating. When the cii-cular fibres M 2 164 THE SENSORIAL FUNCTION. act, the pupillary opening is closely contracted, having the appearance of a single line ; when, on the contrary, the radiating fibres are brought into action, the pupil is dilated to its greatest extent. A strong Ught induces the action of the former, to lessen its effect, and a dim light the latter, to admit the greatest possible quantity of it. The hght, however, does not act on the iris itself, but on the optic nerve, and it is from a reflected action from the braia that the muscular power of the iris is influenced. The motions of the iris are not at all under the control of the wll, nor is the animal sensible of them. They are produced by sympathy with the state of the retina. When, however, a deficient portion of light reaches the retina, and vision is indistinct, we are conscious of an apparent effort to bring the object more clearly into view, and the fibres then con- tract, and the aperture enlarges, and more light is admitted. This dilatation or contraction of the pupil gives a useful method of ascertaining the existence of bHndness in one eye or in both. The cornea and crystalline lens remain perfectly transparent, but the retina is palsied, and is not affected by light ; and many persons have been deceived when bUndness of this description has been confined to one eye. A horse blind in both eyes vrill usually have his ears in constant and rapid motion, directing them in quick succession to every quarter. He will likewise hang back in his halter in a peculiar way, and will lift his feet high as if he were stepping over some obstacle, when there is actually nothing to obstmct his passage, and there will be an evident uncertainty in the put- ting doAvn of his feet. In blindness of one eye little or nothing of this characteristic gait and manner can be perceived. Although a one-eyed horse may not be absolutely condemned for the common business of the carriage or the road, he is generally deterioriated as a hunter, for he can- not measure his distances, and will run into his leaps. Many a sportsman, puzzled and angry at the sudden blundering of his horse, or injured by one or more stunning falls, has found a very natural although unexpected explanation of it in the blindness of one eye, and that perhaps produced thi'ough his own fault, by over riding his willing and excellent servant and causing a determination of blood to the eye, which proved fatal to the delicate texture of the retina. Even for the carriage or the road he ia considerably deteriorated, for his field of observation must be materially lessened. Let the size of both pupils be carefully noticed before the horse is re- moved from the stable, and, as he is led to the door, observe whether they both contract, and equally so, with the increase of light, K the horse should be first seen in the open air, let it be observed whether the pupils are precisely of the same size ; and let the hand be placed over each eye alternately and held there for a little while, and let it be observed whether the pupil dilates with the abstraction of hght, and equally in each eye. Hanging from the upper edge of the pupil of the horse, are two or three round black substances, as large as millet seeds, called the corpora nigra. When the horse is suddenly brought into an intense Hght, and the pupil is closed, they present a singular appearance, as they are pressed out from between the edges of the iris. An equal number, but much smaller, are attached to the edge of the lower portion of the iris. Their general use is probably to intercept rays of light which would be troublesome or injuri- one, and their principal function is accompHshed during the act of grazing. They are larger on the upper edge of the iris, and are placed on the outer side of the pupH, evidently to discharge the same function which we have attributed to the eyelashes, viz., to obstruct the hght in those directions in which it would come with greatest force, both from above and even from THE SENSORIAL FUNCTION. 165 below, while, at the same time, the field of view is perfectly open, so far as it regards the pasture on which the horse is grazing. In our cut m gives a duplicature of the iris, or the back surface of it. This is called the uvea, and it is covered with a thick coat of black mucus, to arrest the rajs of Hght, and to prevent them from entering the eye in any other way than through the pupil. The colour of the ii'is is, in some unknown way, connected with tins black paint behind. Wall-eyed horses, whose iris is white, have no uvea. We now arrive at a body on which all the important uses of the eyo mainly depend, the crystalline lens, g, p. 160, so called from its resemblance to a piece of crystal, or transparent glass. It is of a yielding jelly-like con- sistence, thicker and firmer towards the centre, and convex on each side, but more convex on the posterior than the anterior side. It is enclosed in a delicate transparent bag or capsule, and is placed between the aqueouo and the vitreous humours, and received into a hollow in the vitreous humour, with which it exactly corresponds. It has, from its density and its double convexity, the chief concern in converging the rays of lighl which pass into the pupil. Behind the lens, and occupying four-fifths of the cavity of the eye, is the vitreous humour (glassy, or resembling glass). It seems, when first taken from the eye, to be of the consistence of a jelly, and of beautiful trans- parency ; but if it is punctured a fluid escapes from it as limpid and as thin as water, and when this has been suffered completely to ooze out, a tissue of thin transparent membraneous bags or cells remains. The vitreous humour consists of a watery fluid contained in these cells ; but the fluid and the cells form a body of considerably greater density than the aqueous fluid in the front of the eye. Last of all, between the vitreous humour and the choroid coat, is the retina, o, p. 160, or net-hke membrane. It is an expansion of the substance, /, of the optic nerve. When that nerve has reached the back of the eve, and penetrated through the sclerotic and choroid coats, it first enlarges into a Httle white prominence, from which radiations or expansions of nervous matter proceed, which spread over the whole of the choroid coat, and form the third investment of the eye. The membrane by which this nervous pulp is supported, is so exceedingly thin and dehcate, that it will tear with the shghtest touch, and break even with its own weight. The membrane and the pulp are perfectly transparent in the li-ving animal. The pupil appears to be black, because in the daytime it imperfectly reflects the colour of the choroid coat beneath. In the dusk it is greenish, because, the glare of day being removed, the actual green of the paint appears. On this expansion of nervous pulp, the rays of light from surroundincr objects, condensed by the lens and the humours, fall, and producing u certain image corresponding with these objects, the animal is conscious of their existence and presence. It may, however, so happen that from the too great or too little con- vexity of the eye or a portion of it, the place of most distinct vision may not be immediately on the retina, but a Httle before or behind it. In pro- portion as tliis is the case, the sight will be indistinct and imperfect ; nor shall we be able to offer any remedy for this defect of sight. There is a shying, often the result of cowardice or playfulness, or want of work, but at other times proving, beyond contradiction, a defect of sight even more dangerous than bKndness. A blind horse will resign himself to the guid. ance of his rider or driver ; but against the misconception and starting of a shying horse there is no defence. That horses grow shy as they grow old no one accustomed to them will deny ; and no intelligent person will be slow in attributing it to the right cause — a decay in the organ of vision, 166 THE SENSORIAL FUNCTIOX. — a loss of convexity in the eye, lessening the convergency of the rays, and throwing the perfect image beyond, and not on the retina. There is a striking difference in the convexity of the cornea in the colt and the old horse ; and both of them, probably, may shy from opposite causes — the one fi'oni a cornea too prominent, and the other from one too flat. In the usual examination of the horse previously to purchase, sufficient attention Is not always paid to the convexity of the cornea. The remedy for shying will be considered when we speak of the vices of horses. There is a provision yet wanting. The horse has a very extended field of view, but many persons are not perhaps aware how little of it he can command at a time. There is not one of our readers who can make out a single line of our treatise without changing the direction of the eye. It is curious to follow the motion of the eyes of a rapid reader. Nature has given no less than seven muscles to the horse, in order to turn this little but important organ ; and that they may act with sufficient power and quickness, no fewer than six nerves are directed to the muscles of the eye generally, or to particular ones — while the eye rests on a mass of fat, that it may be turned with Httle exertion of power, and without friction. MUSCLES OF THE EYE. There are four straight muscles, three of which, d, e, and /, are repre- sented in our cut, rising from the back of the orbit, and inserted into the ball of the eye, opposite to and at equal distances from each other. One, d, runs to the upper part of the eye, just behind the transparent and visible portion of it, and its office is clearly to raise the eye. When it contracts, the eye must be drawn upward. Another, /, is inserted exactly opposite, at the bottom of the eye ; and its office is as clearly to depress the eye, or enable the animal to look downwards. A thii-d, e, is inserted at the outer comer, and by means of it the eye is turned outward, and from the situation of the eye of the horse, considerably backward ; and the foui'th is inserted at the inner comer, turning the eye inward. They can thus rotate or turn the eye in any direction the animal vrishes, and by the action of one, or the combined power of any two of them, the eye can be immediately and accurately directed to every point. These muscles, however, have another duty to discharge. They sup- port the eye in its place. In the usual position of the head of the horse, they must be to a certain degree employed for this pui'pose ; but when he is grazing or feeding, the principal weight of the eye rests upon them. Another muscle is therefore added, peculiar to quadrupeds, called the retractor (drawer-baclc) , or the suspensorius {suspensory) muscle, g. It arises from the edge of the foramen through which the optic nerve enters the orbit — suiTOunds the nerve as it proceeds forward, and then, partially dividing into four portions, is attached to the back part of the eye. Its office is evidently to support the eye generally, or, when suddenly called into powerful action, and assisted by the straight muscles, it draws the eye back out of the reach of threatening danger, and in the act of drawing it back causes the haw to protrude, as an additional defence. INJUKIES AXD DISEASES OF THE SKULL, ETC. 167 The power of tliis muscle is veiy great. It renders some operations on the eye almost impossible. It is an admirable substitute for the want of hands, to defend the eye from many things that would injm-e it ; and, being partially separated into foui* divisions, it assists the straight muscles in turning the eye. These muscles discharge another and a most important office. K we examine near and distant objects through a telescope, we must alter the focus ; i. e. we must increase or diminish the length of the tube. We must shorten it a httle when we examine distant objects, because the rays, coming to us from them in a less divergent direction, are sooner brought to a point by the power of the lens. Thus the straight and retractor muscles draw- ing back the eye, and forcing it iipon the substance behind, and in a slight degree flattening it, bring the lens nearer to the retiua, and adapt the eye to the observation of distant objects. Still, however, being constantly employed in supporting the weight of the eye, these muscles may not be able to turn it so rapidly and so exten- sively as the wishes or wants of the animal requii-e ; therefore two others are superadded which are used solely in turning the eye. They are called oblique muscles, because their coui'se is obliquely across the eye. The upper one is most curiously constructed, a, h. It comes from the back part of the orbit, and takes a direction upwards and towards the inner side, and there, just under the ridge of the orbit, it passes through a perfect mechanical pulley, and turning round, proceeds across the eye, under the tendon of the upper straight muscle, and is inserted rather beyond the middle of the eye, towards the outer side. Thus the globe of the eye is evidently dii-ected downwards and outwards. Something more, however, is accomjilished by this singular mechanism. The eye is naturally deep in its orbit, that it may be more perfectly defended ; but it may be necessary occasionally to bring it forward, and enlarge the field of vision. The eye is actually protruded under the influence of fear, l^ot only are the Hds opened more widely, but the eye is brought more forward. How is this accomphshed ? There are no muscles anterior to or before the eye — there is no place for their insertion. The object is readily effected by this sin- gular pulley, c. By the power of this muscle, — the trocJileans, or pulley- muscle — and the straight muscles at the same time not opposing it, or only regulating the direction of the eye, it is really brought somewhat forward. The lower obhque muscle rises just within the lachrymal bone {i, p. 166), and, proceeding across the eye, is fixed into the part of the sclerotica op- posite to the other obhque muscle, and it turns the eye in a contraiy direction, assisting, however, the upper obhque in bi inging the eye forward from its socket. CHAPTER IX INJUEIES AND DISEASES OF THE SKULL — THE BRAIN — THE EARS — AND THE EYES. We have now arrived at a convenient resting-place in our somewhat dry but necessary description of the structure of the horse, and we willingly turn to more practical matter. We will consider the injuries and diseases of the parts we have surveyed. In entering, however, on this division of our work Ave would premise, that it is impossible for us to give the farmer finch an account of the nature and treatment of the diseases of horses as will enable him with safety to practise for himself, except in the com- ]f58 TRESSURE ON THE BRAIN. monest cases. Tlie causes of most diseases are so obscure, their symptoms RO variable, and their connection with other maladies so complicated and mysterious, that a life devoted to professional study will alone qualify a man to become a judicious and successful practitioner on the diseases of the horse and other domestic animals. Our object vnW be to communicate sufficient instruction to the farmer to enable him to act with promptness and judg- ment when he cannot obtain professional assistance, to qualify him to form a satisfactory opinion of the skill of the veterinary surgeon whom he may employ, and, more especially, to direst him of those strange and absurd prejudices which in a variety of cases not only produce and prolong disease, but bring it to a fatal termination. CONCUSSION OP THE BRAIN. This consists of a sudden interruption of the functions of the brain, caused by some mechanical injury to the head, such as a fall or violeni blow, not necessarily accompanied by structural injury to the brain itself. It is frequently produced by the horse rearing and falling backwards, bringing the head with great violence to the ground, or by the animal running away and the head coming in contact with a wall or some hard substance. After the injury, the animal generally lies motionless and in- sensible, and may continue so from a few minutes to half an hour. When in this state, he should be allowed to remain for a time without being dis- turbed, and, in most cases, sensibility will quickly return. The animal having risen, should be removed into a well ventilated but somewhat dark stable. He should be kept for a few days perfectly quiet; a dose of pur- gative medicine should be given, and his diet consist of soft foods, such as bran-mash — when, if no other symptoms show themselves, he may be considered convalescent. The most serious results which sometimes follow this injury of the brain, are fracture of the bones of the skull, or rupture of some large vessel connected with the brain. PRESSURE ON THE BRAIN. Hydatids are often found within the cranial cavity, and lying upon or imbedded in the brain of oxen and sheep. Their existence is usually fatal to the animal. There is no well-authenticated account of the existence of an hydatid in the cranial cavity of the horse ; but cysts, containing a serous or viscid fluid, are occasionally observed. The following is the history of one : — A horse exhibited symptoms of vertigo, or staggers, which disappeared after copious bleeding and purgatives. About twelve months afterwards the same complaint was evident. He carried his head low and inclined to the right side. He staggered as he walked, and the motion of his limbs was marked by a pecuhar action, confined to the fore extremities. He moved by a succession of spasmodic boundings. He was completely deaf ; and rapidly lost flesh, although he ate and drank voraciously. He remained in this state, to the shame of the owner and the practitioner, several months, and then he had a fresh attack of vertigo, and died suddenly. On examination of the brain, its membranes were found to be completely reddened ; and between the two lobes of the brain was a ronnd cyst as large as a pullet's egg. The pressure of this was the manifest cause of the mischief. This may also be produced by some fluid thrown out between the mem- branes, or occupying and distending the ventricles of the brain. In the full-grown horse it rarely occurs ; but it is well known to breeders as an occasional disease of the foal, under the name of ' water in the head * — hydrocephalus. The head is either much enlarged, or strangely deformed, STOMACH STAGGEKS. 169 or both ; and tiie animal dies, either in the birth, or a few days after it. A much more common cause of pressure on the brain arises from fracture, with depression of the bone; when an accident occui's either from a fall or a blow, and it is followed by an immediate state of stupor or insensibiHty, this will be found to be the case, and a careful examination of the cranium will at once detect it ; or very nearly as rapid a state of stupor may supervene when, from the accident, a blood-vessel is ruptured, and effusion of blood on the surface of the brain follows, STAGGERS. Under this head three varieties are famiHarly known : viz.. Stomach Staggers, Sleepy Staggers, and Mad Staggers. They all more or less resemble each other, differing only m their degree of violence, and the causes in operation to produce them. STOMACH STAGGERS, As the name indicates, is generally produced by some derangement of the digestive organs, consequent upon some mismanagement either in the feeding of the animal or in the nature of the food upon which he has been fed. When the horse has been kept for some hours without eating, and has been worked hard, and become thoroughly hungry, he feeds ravenously on every kind of food he can get at, swallowing it faster than his small stomach can digest it, and no water being given to soften and hasten its passage, the stomach becomes crammed, and having been previously exhausted by long fasting, is unable to contract upon its contents. The food soon begins to ferment and to swell, causing great di?tension ; the brain sympathisea ■with this overloaded organ, and staggers are produced. We can easily imagine this, when we remember the sad head-aches occasionally arising fixim an overfilled and disordered stomach. This disease is found more frequently in the stable of the postmaster and the farmer than anywhere else. Thirty years ago it was the very pest of these stables, and the loss sustained by some persons was enormous ; but, as veterinary science progressed, the nature and the causes of the disease were better understood, and there is not now one case of staggers where twenty used to occur. The system of horse management is now essentially changed. Shorter stages, a division of the labour of the day, and a sufficient interval- for rest, and for feeding, have, comparatively spcaldng, banished stomach staggers from the stables of the postmaster. The division of the morning and afternoon labour of the farmer's horse, with the introduction of that eimple but invaluable contrivance, the nose-Lag, ha\-ing rendered this dis- ease comparatively rare in the establishment of the agriculturist. To the late Professor Coleman we are indebted for some of these most important improvements. Old horses are more subject to staggers than young ones, for the stomach has become weak by the repetition of the abuses just described. It has not power to digest and expel the food, and thus becomes a source of general, and particularly of cerebral, disturbance. Horses at grass are occasionally attacked by this disease ; but they ace generally poor, hard- worked, half-starved animals, turned on richer pasture than their impaired digestive organs are equal to. Perhaps the weather is hot, and the sympathy of the brain with the undue labour of the stomach is more easily excited, and a determination of blood to the brain more readily effected. Mr. Percivall gives a very satisfactory illustration of the production of staggers in this way. He says that ' when his father first entered the 170 SLEEPY STAGGERS. service of the Ordnance, it was the custom to turn horses which had become low in condition, but were still well upon their legs, into the marshes, in order to recruit their strength. Dui'ing the months of July, August, and September, notliing was more common than an attack of 3taggers among these horses, and which was naturally attributed to the luxutiant pastxire they were turned into, combined wdth the dependent posture of the head, and the sultry heat to which they were exposed.' When tlie horse is attacked with stomach staggers, he generally appears dull and sleepy, standing with his head hanging down, and supported by the manger, or pushed forward against the wall, breathing heavily, -with a slow, oppressed pulse, bowels constipated and abdomen frequently dis- tended. He sleeps or seems to do so, as he stands, being partly uncon- scious of su7'rounding objects. When aroused he vsdll look vacantly around, perhaps seize a lock of hay, and doze again with it in his mouth. He may continue in this state for several days, and vd.ll either begin slowly to recover, or the symptoms will take a more violent foi*m and terminate either iu apoplexy or phrenitis. In regard to the treatment, it will be necessary for the owner or the veterinary attendant to institute very care- ful inquiry, or he "svill not detect the real causes of the disease. Does it arise from improper management, to which the horse has been in a manner habituated ? Had he been subjected to long labour and fasting, and had then the opportunity of gorging to excess ? Did it proceed from accidental repletion — from the animal having got loose in the night, and found out the com or the chaff bin, and filled himself almost to bursting ? There is nothing in the appearance of the animal which will lead to a discovery ^f the cause — no yellowness or twitchings of the skin, no local swellings, as some have described ; but the practitioner or the owner must get at the truth of the matter as well as he can, and then proceed accordingly. Our first object, then, should be to remove if possible the causes in operation producing this disease, and with this view large doses of oleaginous purgatives should be administered, and repeated eveiy six houi's, and duiTng the interval a stimulant, such as the aromatic spii-it of ammonia, given in large quantities of water ; clysters also of soap and warm water should be frequently administered, and all food removed from the animal. Should this treatment have the desired effect and the horse begin to exhibit signs of retuiTiing consciousness, he should be kept quiet for a time, care being taken to keep the bowels freely open, and nothing but soft and easily digestible food allowed him. K any staggeiing remains, a bhster should be apphed at the back of his head. When sufficiently recovered he may be turned out vsdth advantage on rather bare pasture. One cii'cumstance, however, should never be forgotten, that the horse who has once been attacked witix staggers is liable to a return of the complaint from causes that would not otherwise affect him. Let no farmer delude himself with the idea that stomach staggers is contagious. If his horses have occasionally shght fits of staggers, or if the disease carries off several of them, he may be sure there is something wrong in his management. One horse may get at the corn-bin and cram himself to bursting, but if several are attacked, it is time for the owner to look about him. SLEEPY STAGGERS. Although this disease much resembles stomach staggers in its general characters, it cannot be ti'aced to the same cause, viz., derangement of the digestive organs, but is, generally considered to be a primaiy disease of the brain. The symptoms are much the same as in stomach staggers, the animal appearing dull and sleepy, pushing his head forward in a pecuHar manner against the wall or manger, not however with so much force as in APOPLEXY. 171 that disease. "WTien aroused bj some suddeu noise, lie starts up in a state of alarm, appearing Mglitened, looks up, and perhaps recognises those near him, and then relapses into his foi-mer state of stupor. The -pcdse is slow and oppressed, Tvith the respiration laboured. The stomach frequently contains but Httle food, and no distension of the abdomen is present. By way of treatment a full dose of aloes, in combination with calomel, should be given, and a bHster at once appUed to the upper and back part of the head. The animal in the meantime should be kept perfectly quiet, and allowed nothing but soft food, such as bran-mash, &c. to eat. Should the symptoms not pass off in a few days, an attack of phrenitis will generally follow. APOPLEXY. Although apoplexy is a disease somewhat rare in the horse compared with man, it much resembles it in its generally fatal* termination. It de- pends upon some undue pressure on the substance of the brain, and may result fi'om several causes, such as tumours pressing on the brain, fracture and depression of bone, or rupture of some blood-vessel, and extravasation of blood, either the result of injury, such as concussion, or as a termination of a congested state of the vessels of the brain. Apoplexy as resulting fi'om the last-named cause is the form in which we most commonly meet with the disease in the horse, being generally a termination of stomach staggers. The symptoms will depend upon the cause in operation. When apoplexy is produced by fractui'e and depression of bone or the sudden rupture of some blood-vessel, the result of violence, the symptoms wiU immediately follow the injuiy, but when it is produced by the giving way of the previously congested blood-vessels, we have usually some premoni- tory symptoms. These will be found described under stomach staggers, and may continue for some days, when they suddenly assume a more serious character. The animal, which has hitherto been only in a partly unconscious state, will now be found perfectly insensible ; the eye opens, but it has an un- meaning glare ; the hand is moved before him, but the eye closes not ; he is spoken to, but he hears not. He now begins to foam at the mouth. His breathing is laborious and loud. It is performed by the influence of the organic nerves, and those of animal life no longer lend their aid. The pulse is slow and oppressed — the muzzle is cold, and the discharge of the fceces involuntary. He grinds his teeth — twitchings steal over his face and attack his limbs — they some- times proceed to convulsions, and dreadful ones too, in which the horse beats himself about in a terrible manner ; but there is rarely disposition to do mischief In the greater number of cases these convulsions last not long. The last act of voluntary motion which he wiU attempt is usually to drink : but he has httle power over the muscles of deglutition, and the fluid re- turns through the nostrils. All the powers of life are oppressed, and death speedily closes the scene. Little can be hoped from the treatment of apoplexy, as in most cases all our efforts will fail in affording rehef. K there be time for medical treat- ment, our first effort should be to prevent inflammation, and procure absoi-ption of the extravasated blood. Copious bleeding, therefore, from the jugular vein, to the extent of seven or eight quarts, should be at once had resort to, and a full dose of purgative medicine, from eight to ten drachms of aloes, administered ; clysters also of warm water and soap, should be frequently thrown up the rectum. The animal shotdd be allowed plenty of cool air, and be kept perfectly quiet. Should the more active symptoms abate, which there is too much fear will rarely be the case, care 172 PIIREXITIS. should be taken to keep the bowels freelj relaxed, and a blister may now be applied to the back of the head, or a seton inserted. For some time the horse should be kept on a restricted diet ; mashes should be given ; green meat in no great quantity ; a moderate allowance of hay, and very httle corn until sufficiently recovered, when he may be allowed a more gene- rous diet. PHRENITIS INFLAMMATION OF THE BRAIN MAD STAGGERS. Inflammation of the brain or its membranes, or both, sometimes occurs and of the membranes oftenest when both are not involved. It may bo produced by several causes, such as from a tumour pressing on the brain, or fracture and depression of bone, inflammation supervening after the comatose stage has passed oS". It may also be produced by metastasis, but we most commonly meet with phrenitis in the horse, as a termination of either stomach or sleepy staggers, most frequently the latter. Whatever be the origin of phrenitis, its early symptoms are scarcely difierent from those of stomach or sleepy staggers. The horse is drowsy, stupid ; his eye closes ; he sleeps while he is in the act of eating, and dozes until he falls. The pulse is slow and creeping, and the breathing oppressed and laborious. The symptoms may difier a Httle in intensity and continuance, but not much in kind. The phrenitic horse, however, is not so perfectly comatose as another that labours under apoplexy. The eye will respond a Httle to the action of Hght, and the animal is somewhat more manageable, or at least more susceptible, for he will shrink when he is struck, while the other frequently cares not for the whip. If remedial measures have not become efiectual in the early stage, the scene all at once changes, and the most violent reaction succeeds. The eye brightens — strangely so ; the membrane of the eye becomes suddenly reddened, and forms a frightful contrast with the transparency of the cornea ; the pupil is dilated to the utmost : the nostril, before scarcely moving, expands, and quivers, and labours ; the respiration becomes short and quick ; the pulse hard and frequent ; the ears are erect, or bent for- ward to catch the sHghtest sound ; and the horse becoming more irritable every instant, trembles at the sHghtest motion. The irritability of the patient increases — it may be said to change to ferocity — ^but the animal has no aim or object in what he does. He dashes himself violently about, plunges in every direction, rears on his hind legs, whirls round and round, and then falls backward with dreadfal force. He Hes for a while ex- hausted— there is a remission of the symptoms, but perhaps only for a minute or two, or possibly for a quarter of an hour, Now is the surgeon's time, and his courage and adroitness will be put to the test. He must open, if he can, one or both jugulars : but let bim be on his guard, for the paroxysm will return with its former violence and without the slightest warning. This is a case, and the only case, in which a Hgature should be placed round the neck previously to the vein being opened ; for this being done, however soon the paroxysm of violence may return, a full abstraction of blood may confidently be reHed on. The second attack is more dreadful than the first. Again the animal whirls round and round, and plunges and falls. He seizes his clothing and rends it in pieces ; perhaps, destitute of feeling and of consciousness, he bites and tears himself. He darts furiously at everything within his reach ; but no mind, no design, seems to mingle with or govern bis fury. Another and another remission and a return of the exacerbation iollow, and then, wearied out, he becomes qui^t ; but it is not the quietness of rotriming reason — it is mere stupor. This continues for an uncertain FHRENITIS. 173 period, and then lie begins to struggle again ; but he is no-w probably unable to rise. He pants — he foams — at length, completely exhausted, he dies. There are but two diseases "vvith which pkrenitis can be confounded, and they are colic and rabies. In cohc, the horse rises and falls ; he rolls about and kicks at his belly ; but his struggles are tame compared with those of the phreuitic horse. There is no involuntary spasm of any of the limbs ; the animal is perfectly sensible, and, looking piteously at his flanks, seems designedly to indicate the seat of pain. The beautiful yet fearfully excited countenance of the one, and the piteous, anxious gaze of the other, are sufficiently distinct ; and if it can be got at, the rapid bound- ing pulse of the one, and that of the other scarcely losing its natural character in the early stage, cannot be mistaken. In rabies, when it does assume the ferocious form, there is even more violence than in phrenitis ; but there is method, and treachery too, in that violence. There is the desire of mischief for its own sake, and there is frequently the artful stratagem to allure the victim within the reach of de- struction. There is not a motion of which the rabid horse is not conscious nor a person whom he does not recognise ; but he labours under one all- absoi'bing feeling — the intense longing to devastate and destroy. The post-mortem appearances are altogether uncertain. There is usually very great injection and inflammation of the membranes of the brain, and even of portions of the substance of the brain ; but in other cases there is scarcely any trace of inflammation, or even of increased vascularity. The treatment of phrenitis has been very shortly hinted at. The first — the indispensable proceeding — is to bleed ; to abstract as much blood as can be obtained ; to let the animal bleed on after he is down ; and indeed not to pin up the vein of the phrenitic horse at all. The patient will never be lost by this decisive proceeding, but the inflammation may be subdued, and here the first blow is the whole of the battle. The physic should be that which is most readily given and will most speedily act. The farina of the croton will, perhaps, have the preference. Half a drachm or two scruples of it may be fearlessly administered. The intense inflammation of the brain gives sufficient assurance that no dangerous inflammation will be easily set up in the intestinal canal. This medicine can be formed into a very Little ball or drink, and in some momentary remission of the symp- toms, administered by means of the probang, or a stick, or the horn. Sometimes the phrenitic horse, when he will take nothing else, and is unconscious of everything else, ^svill drink with avidity gruel or water. Repeated dcses of purgative medicine may perhaps be thus given, and they must be continued until the bowels respond. The bleedino- and physic having been energetically had recourse to, these must be followed up by the uninterrupted application of cold in any and every form ; — ice if it can be procui-ed, the coldest water dashed fi^eely against the head, or poui-ed on it from a considerable height, and for a considerable leno-th of time, is the only adjunct that ofiers a chance of relief; — continue it unre- mittingly for hours ; — blisters are not only useless but absolutely injiu-ious, and in this active, rapid, and fatal disease should never be had recoui^se to. The bowels having been well opened, emetic tartar, with calomel or nitre should be given. The animal should be kept as quiet as possible in a somewhat dark but well-ventilated stable. While the disease continues, no attempt must be made to induce the horse to feed ; and even when appetite returns with the abatement of inflammation, great caution must be exercised both with regard to the quantity :«nd quality of the food. 174 MEGRIMS. MEGEIMS. There are but few diseases in tiie horse, respecting the nature of which so many different views have been entertained, and of which, nevertheless, even at the present day, so little is understood, as megrims. Bj some it has been considered as a mild form of apoplexy, depending upon an undue supply of blood to the brain, and by others upon just the opposite state, viz. some obstruction to the natural supply of blood to that organ. Mr. Percivall treats of it as a species of vertigo, but probably the more generui opinion at the present time inclines to the behef that it is a disease analo- gous to that termed epilepsy in the human subject. It is occasionally met with in all classes of horses and under a variety of circumstances, when both at rest and at work, but much more frequently amongst horses that are used for harness purposes, especially when used for that purpose, on the bright, sunny days of spring and summer. It comparatively rarely happens when the horse is ridden ; but should he be driven, and perhaps rather quickly, he may perform a part of his journey with his usual cheerfalness and ease ; he will then suddenly stop, shake liis head, and exhibit evident giddiness and half-unconsciousness. In a minute or two this will pass over, and he will go on again as if nothing had happened. Occasionally, however, the attack will be of a more serious nature. He will fall without the shghtest warning, or suddenly run round once or twice, and then fall. He wiU either he in a state of complete insensibility, or struggle with the utmost violence. In five or ten minutes he ^vill begin gradually to come to himself; he will get up and proceed on his journey, yet somewhat dull, and evidently affected and exhausted by what had happened, although not seriously or permanently ill. This is a very dangerous disease — dangerous to the horse, which will occasionally die on the spot, and particularly dangerous to those who di'ive him, for there will be no warning or opportunity to escape. When the horse is attacked with megrims, the first object of the driver should be to control the violence of the animal as much as possible ; he should loosen the curb-rein, ease the collar, and, if at hand, dash some cold water over the animal's head, and pursue Ms journey as slowly as circumstances will permit. When the horse gets home a dose of purgative medicine should be given to him, and be kept on bran-mash for three or four days, great attention being afterwards paid to the state of the digestive organs. Is all this necessary because a horse has happened to have a fit of the me- grims ? Yes, and more too, in the mind of the prudent man ; for it is seldom that the horse has the megrims without the predisposition to a second attack remaining. The testimony of experience is uniform in re- gard to this, and he would not do justice to himself or his family who trusted himself behind a horse that had a second attack of megrims. The numbers of horses that in London are constantly being sold and resold on account of this malady, is perfectly astonishing. There are a set of men about town, known by the name of 'touters,' who either personally, or through the medium of the common sale yards, dispose of an animal with this affection at prices varying from 15Z. to 30Z. In a short time the unfortunate purchaser discovers his mistake, and is too happy to get rid of him for a few pounds, to be resold to a fresh victim. So notoriously is this the case, that some horses are so well known to be subject to these attacks, that a roar of laughter announces their arrival in the yard. RABIES, OR lyiADNESS. I7fr RABIES, OR MADNESS. Tliis is anotlier and fearful disease of tlie nervous system. It results from the bite of a rabid animal, and most commonly of tlie companion and friend of the horse, the coach-dog. The account now given of this malady is extracted from lectures which the author of the present work delivered to his class. There is occasional warning of the approach of this disease in the horse, or rather of the e>dstence of some unusual malady, the real nature of which is probably mistaken. A mare, belonging to ]\Ir. Karslake, had, ten days before the recognition of the disease, been droop- ing, refusing her food, heaving at the flanks, and pa^wing occasionally. It was plain enough that she was indisposed, but at length the furious fit came upon her, and she destroyed almost everything in the stable in the course of an hour. The late Mr. Moneyment had a two-years-old colt brought to his establishment. It was taken ill in the afternoon of the preceding day, when it first attracted attention by refusing its food, and throAving itself down and getting up again immediately. From such a description, Mr. Moneyment concluded that it was a case of cholic ; but, when he went into the yard, and saw the pony, and observed his wild and anxious countenance, and his excessive nervous sensibility, he was con- vinced that something uncommon was amiss with him, although he did not at first suspect the real nature of the case. The eai-ly symptoms of rabies in the horse have not been carefully observed or well recorded ; but, in the majority of cases, so far as our records go, there will not often be premonitory symptoms sufficiently decisive to be noticed by the groom. The horse goes out to his usual work, and, for a certain time and dis- tance, performs it as well as he had been accustomed to do : then he stops all at once — trembles, heaves, paws, staggers, and falls. Almost im- mediately he rises, drags his load a Httle foi-ther, and again stops, looks about him, backs, staggers, and falls once more. This is not a fit of me- grims— it is not a sudden determination of blood to the brain, for the horse is not for a single moment insensible. The sooner he is led home the better for the progress of the disease is as rapid as the first attack is sudden and, possibly, he will fall twice or thrice before he reaches his stable. In the great majority of cases — or, rather, with very few exceptions — a state of excitation ensues, which is not exceeded by that of the dog under the most fearful form of the malady; but there are intervals when, if he had been naturally good-tempered and had been attached to his ridei or his groom, he will recognise his former friend and seek his caresses, and bend on him one of those piteous, searching looks, which, once observed, will never be forgotten : but there is danger about this. Pre- sently succeeds another paroxysm, without warning and without control ; and there is no safety for him who had previously the most complete mastery over the animal. I was once attending a rabid horse. The owner would not have him destroyed, under the vain hope that I had mistaken a case of phi-enitis for one of rabies, and that the disease might yield to the profuse abstraction of blood that I had been prevailed on to effect, and the purgative influence of the farina of the croton-nut, with which he had been abundantly sup- plied in an early stage of the malady. I insisted on his being slung, so that we were protected from injury fi-om his kicking or plunging. He would bend his gaze upon me as if he would* search me through and through, and would prevail on me, if I could, to reheve him fi'om some dreadful evil by which he was threatened. He would then press his head against my bosom, and keep it there a minute or more. All at once, 176 BABIES, OR MADXESS. however, the paroxysm ivould return. He did not attempt U) bite me ; but, had it not been for the sling, he would have plunged foriously about, and I might have found it difficult to escape. I had previously attended another horse, which the owner refased to have destroyed, and to which attendance I only consented on condition of the animal being slung. He had been bitten in the near hind leg. When I approached him on that side he did not attempt to bite, and he could not otherwise injure me ; but he was agitated and trembled, and struggled as well as he could ; and if I merely touched him with my finger, the pul- sations were quickened full ten beats in a minute. ^Yhen, however, I went round to the off-side, he permitted me to pat him, and I had to encounter his imploring gaze, and his head was pressed against me — and then presently would come the paroxysm ; but it came on aLmost before I could touch him, when I approached him on the other side. These mild cases, however, are exceptions to a general rule. They are few and far between. The horse is the servant, and not the friend of man ; and if his companion, yet an oppressed one. In proportion to his bulk, he has far less of that portion of the brain with which intelligence is connected — less attachment — less gratitude. He is, nevertheless, a noble animal. I am not speaking disparagingly of him ; but I am com- paring him with — next to man — the most intellectual of all quadrupeds. There is neither the motive for, nor the capability of, that attachment which the dog feels for his master, and, therefore, under the influence of this disease, he abandons himself to all its dreadful excitement. The mare of Mr. Karslake, when the disease was fully developed, forgot her former drooping, dispirited state : her respiration was accelerated — her mouth was covered with foam — a violent perspiration covered every part of her, and her screams would cow the stoutest heart. She presently demohshed all the wood- work of the stable, and then she employed herself in beating to pieces the fragments, no human being daring to expose him- self to her fury. The symptoms of the malady of Mr. Moneyment's pony rapidly increased — he bit everything within his reach, even difierent parts of his own body — he breathed laboriously — his tail erect — screaming dreadfnlly at short intervals, striking the ground with his fore-feet, and' perspii-ing most profusely. At length he broke the top of his manger, and rashed out of the stall with it hanging to his halter. He made immediately towards the medical attendant, and the spectators who were standing by. They fortunately succeeded in getting out of his way, and he turned into the next stall, and dropped and died. A young veterinary friend of mine very incautiously and fool-hardily attempted to ball a rabid horse. The animal had previously shown him- self to be dangerous, and had shghtly bitten a person who gave him a ball on the preceding evening : he now seized the young student's hand, and lifted him from the ground, and shook him, as a terrier would shake a rat. It was with the greatest difficulty, and not until the grooms had attacked the ferocious animal with their pitchforks, that they could compel him to relinquish his hold ; and, even then, not before he had bitten his victim to the bone, and nearly torn away the whole of the flesh from the upper and lower surfaces of the hand. In the Museum of the Veterinary School, at Alfort, is the lower jaw of a rabid horse, which was fractured in the vio- lent efforts of the animal to do mischief. There is also in the horse, whose attachment to his owner is often com- paratively small, a degree of treachery which we rarely meet with in the nobler and more intellectual dog. A horse that had shown symptoms of great ferocity was standing in the comer of his box, with a heaving flank, RABIES, OR MADXESS. 177 and every muscle quivering from the degree of excitement under which he laboured. A groom, presuming on the former obedience of the animal, ventured in, and endeavoured to put a headstall upon him. Neither the master nor myself could persuade him to forbear. I was sure of mischief, for I had observed the ear lying flat upon the neck, and I could see the backward glance of the eye ; I therefore armed myself with a heavy twitch stick that was at hand, and chmbed into the manger of the next box. The man had not advanced two steps into the box before I could eee the shifting position of the fore feet, and the preparation to spring upon his victim ; and he would have sprung upon him, but my weapon fell with all the force T could urge upon Ms head, and he dropped. The man escaped, but the brute was up again in an instant, and we trembled lest the partition of the box should yield to his violence, and he would reaKse the graphic description of Mr. Blaine, when he speaks of the rabid horse as ' levelling everything before him, himself sweating, and snorting, and foaming amidst the ruins.' I have had occasion more than once to witness the evident pain of the bitten part, and the manner in which the horse in the intervals of his paroxysms employs himself in licking and gnawing the cicatrix. One animal had been bitten in the chest, and he, not in the intervals between the exacerbations, but when the paroxysm was most violent, would bite and tear himself until his breast was shockingly mangled, and the blood flowed from it in a stream. The most interesting and satisfactoiy s}-niptom is the evident dread of water which exists in the decided majority of cases, and the impossibihty of swallowing any considerable quantity. Professor Dupuy gives an account of this circumstance : — ' A rabid horse was confined in one of the sick-boxes. His food was given to him through an opening over the door, and a bucket was suspended from the door, and supphed "vvith water by means of a copper tube. As soon as he heard the water falling into the pail, he fell into violent convulsions, seized the tube, and crushed it to pieces. When the water in his bucket was agitated, the convulsions were renewed. He would occasionally approach the bucket as if he wished to drink, and then, after agitating the water for an instant, he would fall on his htter, uttering a hoarse cry ; but he would rise again almost imme- diately. These symptoms were dreadfully increased if water was thrown upon his head. He would then endeavour to seize it as it fell, and bite with fury at everything within his reach, his whole frame being dreadfully convulsed.' As the disease progresses, not only is the animal rapidly debUitated, but there is the peculiar staggering gait which is obseiwable in the dog — referable to evident loss of power in the muscles of the lumbar I'egion. I once saw a mare sitting on her haunches, and unable to rise ; yet using her fore feet with the utmost fary, and suflering no one to come within her reach. She, too, would sometimes plunge her muzzle into the ofiered pail ; and immediately withdraw it in evident teiTor, while every limb trembled. At other times the lowering of the pail would affright her, and she would fall on her side and struggle furiously. Although this symp- tom is not often observed in the dog, it is a satisfactory identification of the disease, when it is so frequently seen in the horse, and so invariably in the human being. The earhest, and perhaps the most decisive, symptom of the near approach of rabies in the horse, is a spasmodic movement of the upper lip, particu- larly of the angles of the hp. Close following on this, or contemporaneous with it, are the depressed and anxious countenance, and inquiring gaze, suddenly however hghted up and becoming fierce and menacing, from N 178 TETANUS, OR LOCKED lAW. =;ome unknown cause, or at the approach of a stranger. From time to time different parts of the frame — the eyes — the jaws — particular Hmbs — will be convulsed. The eye will occasionally wander after some imagi- nary object, and the horse will snap again and again at that which has no real existence. Then will come the irrepressible desire to bite the attendants or the animals within its reach. To this will succeed the de- mohtion of the rack, the manger, and the whole furniture of the stable, accompanied by the peculiar dread of water which has been already described. Towards the close of the disease there is generally paralysis, usually confined to the loins and the hinder extremities, or involving those organs which derive their nervous influence from this portion of the spinal cord ; — hence the distressing tenesmus which is occasionally seen. The disease rarely extends beyond the third day. After death, there is uniformly found inflammation at the back part of the mouth, and at the top of the windpipe, and likewise in the stomach, and on the membrane covering the lungs, and where the spinal marrow irst issues from the brain. When the disease can be clearly connected with a previous bite, the sooner the animal is destroyed the better, /or there is no cure. If the symptoms bear considerable resemblance to rabies, although no bite is suspected, the horse should at least be slung, and the medicine, if any is administered, given in the form of a drink, and ■nath the hand well protected ; for if it should be scratched in balling the horse, or the skin should have been previously broken, the saliva of the animal is capable of commurdcating the disease. Several farriers have lost their Hves from being bitten or scratched in the act of administering medicine to a rabid horse. It is always dangerous to encourage any dogs about the stable, and especially if they become fond of the horses, and are in the habit of jump- ing up and h' eking them. The comers of the mouth of the horse are often sore from the pressure of the bit ; and when a coach-dog in a gentleman's stable — and it is likely to happen in every stable, and with every dog — becomes rabid and dies, the horse too frequently follows him at no great distance of time. K a horse is bitten by a dog under suspicious circumstances, he should be carefully examined, and every wound, and even the slightest scratch, Tvell burned with the lunar caustic (nitrate of silver). The scab should be removed and the operation repeated on the third day. The hot iron does not answer so well, and other caustics are not so manageable. In the spring of 1827, four horses were bitten, near Hyde Park, by a mad dog. To one of them the lunar caustic was twice severely apphed — he Hved. The red-hot iron was unspai-ingly used on the others, and they died. The caustic must reach eveiy part of the wound. At the expiration of the fourth month, the horse may be considered to be safe. TETANUS, OR LOCKED JAW. Tetanus is one of the most dreadful and fatal diseases to which the horse is subject. It is called locked jaw, because the muscles of the jaw are earUest affected, and the mouth is obstinately and immoveably closed. It is a permanent spasm of all the voluntary muscles, and particularly of those of the neck, the spine, and the head. It is sometimes slow and treacherous in its attack. The horse, for a day or two, does not appear to be quite well ; he does not feed as usual ; he partly chews his food, and drops it ; and he gulps his water. The owner at length finds that the motion of the jaws is considerably hmited, and some saliva is drivelling from the mouth. TETAXUS, OR LOCKED JAW. 179 If lie tries he can only open the mouth a very Httle way or the jaws are perfectly and rigidly closed ; and thus the only period at which the disease could have been successfully combated is lost. A cut of a horse labouring under this disease is here given, which the reader will do well to examine carefully. The first thing that strikes the observer is a protrusion of the muzzle, and stiifness of the neck; and, on pass- ing the hand do^vn it, the muscles will be found singular- ly prominent, dis- tinct, hard, knotty, and unyielding. — - There is difficul- ty in bringing the head round, and still greater diffi- culty in bending it. The eye is drawn deep within the socket on the shghtest excite- ment, and, in consequence of this, the fatty matter behind the eye is pressed forward ; the haw is protruded, and there is an appearance of strabismus, or squinting, in an outward direction. The ears are erect, pointed forward, and immoveable ; if the horse is spoken to, or threatened to be struck, they change not their position. Considering the beautiful play of the ear in the horse when in health, and the kind of conversation which he maintains by the motion of it, there is not a more characteristic s^inptom of tetanus than this immobility of the ear. The nostril is expanded to the utmost, and there is little or no play of it, as in hurried or even natural breathing. The respiration is usually acce- lerated, yet not ahvays so ; but it is uniformly laborious. The pulse gives little indication of the severity of the disease. It is sometimes scarcely affected. It will be rapidly accelerated when any one approaches the animal and offers to touch him, but it presently quiets down again almost to its natural standard. After a while, however, the heart begins to sympathise with the general excitation of the system, and the pulse in- creases in frequency and force until the animal becomes debilitated, when it beats yet quicker and quicker, but diminishes in power, and gradually flutters and dies away. The countenance is eager, anxious, haggard, and tells plainly enough what the animal suffers. The stiffness gradually extends to the back. If the horse is in a narrow stall, it is impossible to turn him ; and, even with room and scope enough,, he turns altogether like a deal-board. The extremities begin to participate in the spasm — the hinder ones generally first, but never to the extent to which it exists in the neck and back. The horse stands ^ith his hind legs straddling apart in a sing-ular way. The whole of the limb moves, or rather is dragged on together, and anxious care is taken that no joint shall be flexed more than can possibly be helped. The fore limbs have a singular appearance ; they are as stiff as they can possibly be, but stretched forward and straddling. They have not iinaptly been compared to the legs of a form. The abdominal muscles gradually become involved. They seem to n2 /80 TETANUS, OR LOCKED JAW. contract "with, all tlie power tliey possess, and tliere is a degree of ' hido- bound ' appearance and i-igidity, and of tucking up of the belly, which ia seen under no other complaint. The tail becomes in constant motion from the alternate and violent action of the muscles that elevate and depress it. Constipation, and to an almost insurmottntable degree, now appears. The abdominal muscles are so powerfully contracted, that no portion of the contents of the abdomen can pass on and be discharged. By degrees the spasm extends and becomes everywhere more violent The motion of the whole frame is lost, and the horse stands fixed in the un- natural posture which he has assumed. The countenance becomes wilder and more haggard — its expression can never be effaced from the memory of him who cares about the feehngs of a brute ; the tail is now permanently raised, and, if depressed for a moment by the hand, instantly resumes its elevation. The violent cramp of a single muscle or set of muscles makes the stoutest heart quail, and di-aws forth the most pitious cries — what, then, must it be for this torture to peiwade the whole frame, and to con- tinue, vsdth little respite, from day to day, and from week to week. When his attendant approaches and touches him, he scarcely moves ; but the despairing gaze, and the sudden acceleration of the pulse, indicate what he feels and fears. Tetanus, then, is evidently an affection of the nerves. A small fibre of some nerve has been injured, and the effect of that injury has spread to the origin of the neiwe — the brain then becomes affected — and universal diseased action follows. Tetanus is a spasm of the whole frame — not merely of one set of muscles, but of their antagonists also. The fixidity ot the animal is the effect of opposed and violent muscular contraction. It belongs to the lower column of nerves only. The sensibiHty is unimpaired — perhaps it is heightened. The horse would eat if he could ; he tries to suck up some moisture from his mash ; and the avidity with which he lends himself to assist in the administering of a Httle gruel, shows that the feel- ings of hunger and thirst remain unimpaired. The disease may terminate fatally in forty-eight hours, but as a rule death takes place from the third to the sixth day ; if the horse should survive till the seventh or eighth day, a favourable termination may be expected, although in some cases they will die a month after the attack. If from strength of constitution or medical treatment, he should recover, the first favourable symptom is a sHght and short remission of the spasm ; the time of the remission gradually lengthening, and the jaws a Httle re- laxing ; but the progress of cui^e is exceedingly slow, and the horse is left very weak. On post-mortem examination the muscular fibre will exhibit sufiicient proof of the labour which has been exacted from it. The muscles will appear as if they had been macerated — their texture will be softened, and they will be torn with the greatest ease. The lungs will, in the majority of cases, be highly inflamed, for they have been labouring long and painfully to furnish arterial blood in sufiicient quantity to support this great expendi- ture of animal power. The stomach will contain patches of inflammation, but the intestines, in most cases, will not exhibit much departure from the hue of health. The examination of the brain will be altogether unsatis- factory. There may be slight injection of some of the membranes, but, in the majority of cases, there will not be any morbid change worthy of record. Tetanus is usually the result of the injury of some nei-vous fibre, and the effect of that lesion propagated to the brain. It occurs at all ages, from tie foal a fortnight old, and amongst all classes of the horse ; but TETANUS, OK LOCKED JAW. 181 iugh-bred, iiTitablo animals are tte most liable to it. It may result from almost every variety of wound, no matter what its situation. It would appear, however, that wounds in some parts have a much greater tendency to produce this disease than in others. The foot is a very frequent source or focus of tetanic injury. The horse becomes lame — the injui-y may have been carefully treated, carelessly treated, or not treated at all — the lameness, however, disappears, but the wound has not healed. There is an un- healthiness about it, and at the expiration of eight or ten days, tetanus appears. Some nervous fibre has been irritated or inflamed by the acci- dent, slight as it was. Docking, nicking, overreach, suppurating corns, castration and injuries, especially about the orbit, are freqacnt causes of tetanus. In all these cases the attack is termed Traumatic Tetanus as arising from, or depend • ing on, some injury received, but unquestionably it may be set up without any external injuiy whatever. The records of veterinary proceedings contain accounts of tetanus following labour, brutally exacted beyond the animal's natural strength, in the draught of heavy loads. Horses that have been matched against time have too frequently died of tetanus a little while afterwards. Sudden exposiire to cold after being heated by exercise has produced this dreadful state of nei-vous action, and especially if the horse has stood in a partial draught, or cold water has been dripping on the loins. These cases are called Idiopathic Tetanus, that is, arising, Hke any other severe malady, from some pecuHar susceptibility to derange- ment of the constitution itself. Traumatic Tetanus is much the most dangerous kind, and will generally prove fatal ; on the other hand, from Idiopathic Tetanus the animal not unfrequently recovers. Other tenns are also appKed to distinguish when certain pai-ts only are afiected. "WTien the spasm is confined to the muscles of the jaws it is named Trismus ; when the muscles of the neck and back axe chiefly afiected, it is called Opisthotonos ; the reverse of this, when the inferior muscles are afiected, is Emprosthotonos ; when the body is drawn to one side, that of Pleurosthotonos. Although these different states may exist in the human subject, we shall rarely meet with them in the horse, and then only in the form of Trismus or Opisthotonos. The treatment of tetanus is simple, and would be oftener successfal if carried to its full extent. The indication of cuj-e is plaiu enough — the system must be tranquillised. Eight or ten drachms of aloes, with 5i. to Sij- calomel, should be ad- ministered. K the remission of the spasm is sHght, there is another pur- gative— not so certain in its action, but more powerful when it does act — the farina of the croton nut. There is little or no danger of exciting inflammation of the mucous membrane of the intestines by this prompt and energetic administration of purgative medicine, for there is too much determination of vital power towards the nervous system — too much irritation there — to leave cause for di^eading the possibiHty of n;etastasis elsewhere. It would be desirable if a certain degree of inflammation could be excited, because to that extent the ii-ritation of the nervous system might be allayed. There is another reason, and a very powerful one — ■ time is rapidly passing. The tetanic action may extend to the intestines, an.d the co-operation of the abdominal muscles in keeping up the peristaltic motion of the bowels, and expelling theii' contents, may be lost. We have, indeed, more faith in the effect of physic, as a remedy for this di-eadful disease, than any other ; if active purgation can be set up — and a chance of recovery is left — that purgation "srill insui-e it. Use the balHng probang, a cone, a stick, anything, to introduce a full dose of physic into his throat ; if not into his throat, leave it on the tongue ; /f that is impossible, insert 182 TETANUS, OR LOCKED JAW. it between tlie lips and the grinders — this may always be done — and to a certainty a greater portion of it will gradually be swallowed. This should be followed by the administration of SU- of powdered opium frequently repeated. Opium is not only a valuable drug, but it is that on which alone dependence can be placed in this disease. Clysters may also be employed to assist in promoting the action of the bowels. Bleeding, bhstering, friction to the back, and the apphcation of cold water are calculated to do no good, and suchlike remedies should not be had resort to. The one great object in the treatment of tetanus should be to keep the animal as quiet as possible, and free from those attentions assuming the shape of remedial measures which are too apt to increase the already excited state of the nervous system. The horse should be placed in a warm, somewhat dark, but well- ventilated stable, selected as free as possible from all external noises. Both the floor of the stable and also for some distance outside should be covered with short litter. The stable should be locked, and no one allowed to see the animal but the attendant or professional man, and when this is rendered necessary for the administration of food or medicine, great caution should be used in preventing any sudden noise or movement which may disturb the animal. One thing should not be forgotten, namely, that a horse with locked jaw is as hungry as when in health, and every possible contrivance should be adopted to furnish him with that nutriment which will support him under his torture, and possibly enable him to weather the storm. If a pail of good gruel is placed within his reach, how will he nuzzle in it, and contrive to drink some of it too ! If a thoroughly wet mash is placed before him in a pail, he will bury his nose in it, and manage to extract no small portion of nutriment. By means of a small horn, or a bottle with a very narrow neck, it will often be possible to give him a small quantity of gruel ; but the flexible pipe that accompanies Read's patent pump will render this of easier accomphshment, for the nutriment may be administered without elevating the head of the horse, or inflicting on him. the extreme torture which used to accompany the act of drenching. If the jaw is ever so closely clenched, the pipe may be introduced between the tushes and the grinders, and carried tolerably far back into the mouth, and any quantity of gruel or medicine introduced into the stomach. Nor is this the only way in which this valuable instrument may be made available in this fearfal disease ; for with an enema pipe attached to the end of the tube, considerable quantities of good beef tea, strong infusions of oats or malt, combined with thick well-boiled gruel, may be injected into the intestines, and the animal's strength supported to a considerable extent. It will also be good practice to let a small portion of food be in the manger. The horse will not at first be able to take up the sHghtest quantity, but he will attempt to do so. Small portions may be placed between his grinders, and they will presently drop from his mouth scarcely or at all masticated : but some good will be done — there is the attempt to put the muscles of the jaw to their proper use. On the following day he will succeed a Httle better, and make some trifling advance towards breaking the chain of spasmodic action. Experience wiU teach the careful groom the value of these -aninutias of practice ; and the successful termination of many a case m.ay be traced to the careful nursing of the patient. "When the horse is getting decidedly better, and the weather will permit, there can be no better practice than to turn liim out for a few hours in the middle of the day. His toddling about will regain to him the use of his limbs ; the attempt to stoop in order to gi-aze will diminish the spasm in his neck ; the act of grazing will relax the muscles of the jaws ; and lie can have no better food than the fresh grass. CRAiMP. — STRINGHALT. 183 CRAMP. This is a sudden, involuntary, and painful contraction of a particular muscle or set of muscles. It difiers froiu tetanus in its shorter duration, and in its occasionally attacking the muscles of organic life. It may be termed a species of transitory tetanus, affecting mostly the hind extremities. It is generally observed v?hen the horse is first brought out of the stable, and especially if he has been hardly worked. One of the legs appears stiff, inflexible, and is, to a shght degree, dragged after the animal. After he has proceeded a few steps, the stiffness nearly or quite disappears, or only a slight degree of lameness remains during the greater part of the day. Cramp may be brought on by exposure either to a high or low tempera- ture. If a certain degree of lameness remains, the attendant on the horsn should endeavour to find out the muscle chiefly affected, which he may easily do by a feeling of hardness, or an expression of pain, when he presses on the part affected. Friction with the hand wall very frequently be all that is necessary to remove cramp, but should this not be effectual, hot fomentations to the part, and the administration of laxative medicines, must be had resort to. STRINGHALT. This is a sudden and spasmodic action of some of the muscles of the thigh, observable when the horse is first led from the stable. One or both legs are caught up at every step with great rapidity and violence, so that the fetlock sometimes touches the belly. In the great majority of cases it does not disappear after exercise, but the horse continues to be afihcted with this peculiar gait. In a few cases, however, after the horse has been out a httle while, it partially goes off, and the normal action of the limb, to a certain extent, returns. Stringhalt is not a perfectly involuntary action of a certain muscle, or a certain set of muscles. The limb is flexed at the command of the will, but it acts to a greater extent and with more violence than the will had prompted. There is an accumulation of excitability in the muscle, and the impulse which should have called it into natural and moderate action causes it to take on a spasmodic one. But although the peculiar action constituting stringhalt is developed through the muscles, it must not be taken for granted that the cause of the affection lies in the muscles themselves, but rather in the tissues through which the muscular action is exerted, namely, the nerves ; and, as a general rule, it may be stated that disease of the nerves themselves, more particularly of the great Ischiatic nerve, or of the canal through which they pass from the spinal cord, will be found to exist. Either the nerve at its origin is softened and discoloured, or its egress from the ver- tebral canal is through a roughened and irritating foramen instead of a smooth and pohshed one. Many ingenious but contradictory theories have been advanced in order to account for this peculiarity of gait. What muscles are concerned ? Clearly those by which the thigh is brought under the belly, and the hock is flexed, and the pasterns are first flexed and then extended. But by which of them is the effect principally produced ? What muscle, or, more properly, what nerve is concerned ? Instead of entering into any useless controversy on this point, a case shall be related, and one of the most interesting there is on record : the author was personally cognisant of every particular. Guildford, first called Roundhead, and then Landlord, was foaled in 184 STKINGHALT. 182G. He was got by Hampden out of a Sir Harry Dimsdale mare. In 1828, and being two years old, and the property of the Duke of Richmond,, he won a 601. plate at Goodwood. In 1829, and belonging to Lord W. Lennox, he won 55 guineas at Hampton. Being then transferred to Mr. Coleman, he won 50 guineas at Guildford ; and in the same year, having been jiurchased by Mr. Pearce, he won 60 guineas at Basingstoke. Tn the course of this year stringhalt began to appear in a slight degree, and it evidently, although slowly, increased. There soon began to be a httle difficulty in getting him otf ; but when he had once started, neither his speed nor his stoutness appeared to be in the shghtest degree im- paired. He continued on the turf until 1836, and won for his different owners seventeen races, the produce of which, exclusive of bets, amounted to 1,435Z. The difficulty and loss of advantage in starting had now increased to a degree which rendered it prudent to withdraw him from the turf, and he came into the possession of Dockeray, who used him for the purpose of leading the young horses that he had under training. This is well kno"\vn to be hard work, and his rider was a man of some weight. In addition to this, he was generally hunted twice in the week. His first starting into a gallop had something singular about it. It was a horrible kind of con. vulsive action, and so violent, that he frequently knocked off his shoes oo the very day that they were put on ; but when he got a Uttle warmed, all this disappeared. He galloped beautifully, and was a very sure fencer. The sport, however, being over, and he returning to a slow pace, the stringhalt was as bad as ever. At length the old horse became artful, and it was with great difficulty that he could be made to lead. Sometimes he refused it altogether, lu consequence of this, he was sent to St. Martin's Lane to be sold. The highest bidding for him was 31. 14s., and the hero of the turf and the field was doomed to the omnibus. There he was cruelly used, and this spasmodic convulsion of his hind legs sadly aggravated his torture. The skin was presently rubbed from his shoulders, his hips and haunches were bruised in every part, and his stifles were continually and painfully coming in contact with the pole. In this situation he was seen by the veterinary surgeon to ' The Society for the Prevention of Cruelty to Animals.' There is a fund at the disposal of that society for the purchase of worn-out horses, who are immediately released from their misery by the pole-axe of the knacker. The horse was bought for this purpose, another and laudable motive influencing the purchase — the vdsh to ascertain what light the dissection of an animal that had had stringhalt to such an aggravated extent, and for aO long a period, would cast on the nature of this disease. The author of this work saw him a little while before he was slaughtered. He was still a noble-looking animal, and seemed to possess all his formez strength and spirit unimpaired ; but he was sadly scarred all over, in con- sequence of his being put to a kind of work for which his spasmodic complaint so entirely incapacitated him. So aggravated a case of stiing- halt had rarely been seen. Both hind legs were affected, and both in an equal degree ; and the belly was forcibly struck by the pastern joints every time the hind feet were lifted. The belly and the pastern joint were both denuded of haii' in consequence of this constant battering. He was destroyed by the injection of prussic acid into the jugular vein, and the dissection of him was conducted by Professor Spooner, of the Royal Veterinary College. On taking ofl' the skin, all the muscles presented their perfect healthy character. There was not the ahe^htest enlarcrement or discoloration of STRINGHALT. 183 the fascia3. The muscles of both extremities were dissected from their origins to their tendinous terminations, and their fibrous structure care- fully examined. They were all beautifully developed, presenting no inequaUty or irregularity of structure, nor aught that would warrant the suspicion that any one of them possessed an undue power or influence beyond the others. The only abnormal circumstance about them was that they were of a rather darker yellow in colour than is usually found. This referred to them generally, and not to any particular muscle or sets of muscles. The lumbar, crural, and sciatic nerves were examined from the spot at which they emerge from the spinal cord to their ultimate disti-ibutions. The ciTiral and lumbar nerves were perfectly healthy. The sciatic nerve, at the aperture thi'ough which it escapes from the spine, was darker in colour than is usual, being of a yellowish-brown hue. Its texture was softened, and its fibrillar somewhat loosely connected together. The nerve was of its U5ual size ; but, on tracing it in its course through the muscles of the haunch, several spots of ecchymosis presented themselves, and were more particularly marked on that part of the nerve which is connected Avith the sacrosciatic ligament. As the nerve approached the hock, it assumed its natural colour and tone ; and the fibres given off from it to the muscles situated inferior to the stifle-joint were of a perfectly healthy character. On dissecting out a portion of the nerve where it appeared to be in a diseased state, it was found that this ecchymosis was confined to the mem- branous investitui-e of the nerve, and that its substance, when pressed from its sheath, presented a perfectly natural character. The cavity of the cranium, and the whole extent of the spinal canal, were next laid open. The brain and spinal marrow were depi'ived of their membranous coverings, and both the thecoe and their contents dihgently examined. There was no lesion in any part of them, not even at the lumbar region. The articulations of every joint of the hind extremities then underwent inspection, and no disease could be detected in either of them. Professor Spooner was of opinion that this pecuHar afiection was not referable to any diseased state of the brain or spinal cord, nor to any local afiection of the muscles of the limbs, but simply to a morbid afiection of the sciatic nerve. He had not dissected a single case of stringhalt in which he had not found disease of this nerve, which mainly contributes to supply the hind extremities vsith sensation and the power of voluntary motion. As a proof that stringhalt may come on suddenly the following is a case in point. A race-horse called 'Warwick' fell out of a horse-box, when travelling at the rate of twenty miles per hour by rail between Holywell and Flint, and when he got up he was afiected with stringhalt ; he won many races afterwards. The cause of the accident was this: the horse- box was standing against a wall, and, while loading, the porters forgot to fasten the door next the wall. Shortly after the train was in motion, the flap or door of the box fell do'SATi, letting the horse's hind parts out ; being tied up with a small race-horse head- collar, fortunately it broke, and the animal fell out on the rails. Being a cold morning he was Avrapt up in extra rugs, which so enveloped him as to prevent the rails cutting him. The train was stopped, and the horse was found lying quite unnerved : the instant he was spoken to he got up, and the stable-boy led him away home. The only injury he received was stringhalt in both legs, and he had never shown the least symptoms of it before : he was five veai's old at the time of the accident. 186 PAKALYSIS, OR PALSY. Now coraes a very important question. What connection is there be- tween stringhalt and the supposed value or deterioration of the horse ? Some experienced practitioners have maintained that it is a pledge of more than usual muscular power. It is a common saying that ' there never was a horse with stringhalt that was incapable of doing the work required of him.' Most certainly we continually meet with horses having stringhalt that pleasantly discharge all ordinary, and even extraordinary, serWce ; and although stringhalt is excess or irregular distribution of nervous power, it at least shows the existence of that power, and the capabiHty in the muscular system of being acted upon by it. Irregular distributions of vital energy are not, however, things to be desired. They argue disease and derangement of the system, and a predisposition to greater derange- ment. They materially interfere with the speed of the horse. This was decidedly the case with regard to the poor fellow whose history has been related. Stringhalt is decided unsoundness. It is an irregular supply of the nervous influence, or a diseased state of the nervous or muscular system, or both. It prevents us from suddenly and at once calling upon the horse for the fall exercise of his speed and power, and therefore it is unsound- ness ; but, generally speaking, it so little interferes with the services of the animal, that, although an unsoundness, it would not weigh a great deal against other manifest valuable quahties. PARALYSIS, OR PALSY. The stream of nervous influence is sometimes stopped, and thence results palsy. In the hujnan being general palsy sometimes occurs. The whole body — every organ of motion and of sense — is paralysed. The records of our practice, however, do not afford us a single instance of this ; but of partial paralysis there are several cases, and most untractable ones they were. The cause of them may be altogether unknowTi. In the human being there is yet another distinction. Hemiplegia and Paraplegia. In the former the aflfection is confined to one side of the patient ; in the latter the posterior extremity on both sides is affected. Few cases of hemiplegia occur in the horse, and they are more manageable than those of paraplegia ; but if the affection is not removed, they usually degenerate into paraplegia before the death of the animal. It would appear singular that this should be the most common form of palsy in the human being, and so rarely seen in the quadruped. There are some considerations, however, that will partly account for this. Palsy in the horse usually proceeds from injury of the spinal cord ; and that cord is more developed and far larger than in the human being. It is more exposed to injury, and to injury that will affect not one side only, but the whole of the cord. Palsy in the horse, although sometimes attacking the fore extremities, is far more frequently met >vith in the hind ones. The reason of this is plain. The fore limbs are attached to the trunk by a dense mass of highly elastic substance. This was placed between the shoulder-blade and the ribs for the purpose of preventing that concussion, which would be an- noying and even dangerous to the horse or liis rider. Except in conse- quence of a fall, there is scarcely the possibility of any serious injury to the anteiior portion of the spine. The case is very different with regard to the hind limbs and their attachment to the trunk ; they are necessarily liable to many a shock and sprain injurious to the spine and its contents. The loins and the back oftenest exhibit the lesions of palsy, because there are some of the most violent muscular efforts, and there is the greatest movement and the least support. It may, consequently, be ^jaken as an PARALYSIS, OR TALSY. 187 axiom to guide the judgment of the practitioner, that palsy in the horpe almost invariably proceeds from disease or injury of the spine. We most frequently meet Tvith complete paraplegia in the horse, as the result of some injury to the spine. It sometimes ensues when the animal has been cast for the performance of some operation : he stniggles vio- lently at first, but after a time ceases. The operation being concluded the hobbles are removed, and attempts are made to cause the animal to arise ; but these are fruitless, and to the great annoyance of the operator, his hind extremities are found to be totally paralysed. It is also met vdih. ir. the hunting-field, as a consequence of the animal di^opping the hind ex- tremities into a fence, or when galloping across a field, suddenly placing the hind legs into a drain or hidden trench ; when this happens the animal generally drags his hind extremities a short distance and falls ; he vnU then make frequent efforts to get up again, but will only succeed in raising his fore extremities ; the hind ones are paralysed : in short, his ' back is broken.' It may also be produced by getting cast in the stable, and sHpping up, &c. In most of these cases the posterior dorsal or lumbar vertebrae will be found to be either displaced or fractured, and the symptoma will appear immediately after the injury. Other causes of paralysis are— ■ exposure to cold and moistoi-e, and disease afiectiug the spinal cord itseU, or its membranes. When this is the case, we sometimes get premonitory symptoms. The first symptoms generally noticed will be a peculiar reeling unsteadiness in the animal's walk, Avhich wiU be increased when he is made to trot, the hind legs being to a certain extent dragged after him. This may continue for an uncertain length of time, but in most cases, the animal wiU get gradually worse in a few days, until he falls and is unable to rise again. Paralysis may also be confined to certaiu parts only, such as the face, ear, and lips ; another frequent instance of this will be found in paralysis of the muscles on one side of the larynx, pro- ducing roaring. The treatment of paralysis will not generally prove veiy successful. If it results from a ^-iolent injury, and we have reason to beHeve from the circumstances connected with it, and the total loss of both motive and sentient power in the hind extremities, that some fracture or dislocation of the vertebra has taken place, the animal should be at once destroyed. If we have premonitory symptoms sufiicient to indicate the approach of an attack of paralysis, a strong dose of purgative medicine should be at once administered, and this should be assisted by frequent injections of warm water. The loins should be covered with a mustard poultice, frequently renewed. The patient should be placed in a weU-ventilated stable, kept warmly clothed, and his food consist for the first few days of nothing but bran-mash. J£ the horse be down, the better plan to adopt will be to make him as comfortable as possible, taking care to turn him on the other side occasionally, so that the muscles may not become cramped. This will be better than placing him in slings. If favourable symptoms appear, and the animal begins to regain the use of his limbs, he must not be in the sHghtest degree neglected, nor medical treatment suspended. There are few diseases in which the animal is more hable to a relapse, or where a relapse would be so fatal. The bowels should be kept relaxed, counter- irritation continued over the loins, and great attention paid to the animal's diet. Strychnine, and many other medicines, have been strongly recom- mended in attacks of paralysis, but they are doubtful and powerfully dangerous remedies. If the disease assumes a somewhat chronic form, an extensive and stimulating charge over the loins should be appHed. Il will accomplish three purposes — there ^^all be the principle of counter- irritation, a defence against the cold, and a useful support of the limbs. 188 DISEASES OF THE EYE. Wlien paralysis is confined to certain parts alone, sucli as the ear, lips, and larynx, any apparent cause sliould be at once removed, and then treated by counter-ii-ritants, such as bUsters and setons. DISEASES OF THE EYE. The diseases of the eye constitute a very important, but a most unsatis- factory division of our work, for the maladies of this organ, although few in number, are fi^equent in their appearance. They are sadly obotinate, and often baffle all skill. Occasionally a wound is inflicted by a passionate or careless servant. The eye itself is rarely injured. It is placed on a mass of fat, and it turns most readily, and the prong of the fork glances ofi"; but the substanco round the eye may be deeply wounded, and very considerable inflammation may ensue. This should be abated by poultices, and bleeding, and physic ; but no probe should be used under the foolish idea of ascertaining the depth of the wound in the Hd, supposing that there should be one, for, from the constant motion of the eye, it is almost impossible to pass the probe into the original wound, and the efibrt to accomphsh it would give a great deal of pain, and increase the inflammation. The eyehds are subject to occasional inflammation from blows or other injuries. Fomentation with warm water will be serviceable here. The horse has occasionally a scaly eruption on the edges of the eyehds, attended with great itching, in the efibrt to aUay which, by rubbing the part, the eye may be blemished. The nitrated ointment of mercury, mixed with an equal quantity of lard, may be shghtly rubbed on the edges of the Hds with considerable good efiect. The eyelids Avill sometimes become oedematous. Horses that are fed in low and humid pastm-es are subject to this. It is also the consequence of inflammation badly treated. The eyehds ai-e composed of a lax structoi^e, and the tissue is somewhat deficient in vitahty — hence this disposition to enfiltration. Sometimes the collection of fluid accumulates so rapidly, and BO extensively, that the eyes are closed. They should be well bathed with warm water mingled with an aromatic tincture. The cellular substance of the hds will thus be disposed to contract on their contents and cause their absorption. Old carriage-horses are subject to this oedema ; and it frequently accom. panics both chronic and common ophthalmia. Weakness and dropping of the upper Hd is caused by diminution or loss of power in its muscles. Dry frictions and astiingcnt lotions vrili fre- quently restore the tone of the parts. The eyehds are subject to occasional injury from their situation and office. In small incised wounds of them great care should be taken that the divided edges unite by the first intention. This wn.ll hasten the cure and prevent deformity. If any of the muscles are divided, it is usually the ciliary or orbicularis palpebrarum. This lesion must be healed, if possible, by the first intention, and either by means of adhesive plaster or the suture. The suture is probably the preferable agent. If the accident has occurred many hours before being noticed, and a portion of the upper hd hangs over the eye, it should on no account be removed without attempts being made to cause it to unite by taking a sharp scalpel, and removing a small portion from the lacerated edges and afterwards bringing them together with metaUic sutures. Great care should be afterwards taken to secure the animal's head in such a position that he cannot rub the wound against the manger or wall of the stable. Suppurating wounds in the eyehds may be the consequence of the ne- SIMPLE OPHTHALMIA. 18& ccssary absiractioii of a considerable surface of the skin in the removal of warts or tumours. The principal thing to be attended to is the frequent removal of the pus by means of tow or cotton wool. The rest may generally be left to nature. Inversion of the hd is of very rare occurrence in the horse. Warts are sometimes attached to the edges of the Hds, and are a source of great irritation. When rubbed they bleed, and the common opinion is true — that they are propagated by the blood. They should be taken off with a sharp pair of scissors, and their roots touched with the lunar caustic. The membrane which covers the haw is subject to inflammation. lu is, indeed, a continuation of the conjunctiva, the inflammation of which constitutes ophthalmia. An account of this inflammation will be bettet postponed until the nature and treatment of ophthalmia comes unde? particular notice. The Haw, or Memhrana Nictifans, is subject to inflammation pecuhai to itself, arising from the introduction of foreign bodies, or from blows or other accidents. The entire substance of the haw becomes inflamed. It swells and protrudes from the inner angle of the eye. The heat and red- ness gradually disappear, but the membrane often continues to protrude. The inflammation of this organ assumes a chronic character in a very short time, on account of the structure of the parts, which are in general little susceptible of reaction. The ordinary causes of this disease in the horse are repeated and periodical attacks of ophthalmia, and blows on the part. Young and old horses are most subject to it. Emolhent apphcations, bleeding, and restricted diet will be proper at the commencement of the disease, and, the inflammation being abated, sHght astringents will bo useful in preventing the engorgement of the part. Rose-water with subacetate of lead will form a proper collyrium. If the protruding body does not diminish after proper means have been tried, and for a suflQ.cient period, it must be removed ^vith a curved pair of scissors. No danger wiU attend this operation if it is performed in time. Ulceration and caries of the cartilage will sometimes be accompanied by ulceration of the conjunctiva. This will frequently prove a very serious affair. The Caruncula Lachrymalis, or Tubercle, by means of which the tears are directed into the canal through which they are to escape from the nostril, is sometimes enlarged in consequence of inflammation, and the Puncta LachrymaHa, or conduits into which the tears pass from the eye, are partially or completely closed. The apphcation of warm and emol- hent lotions will generally remove the collected mucus or the inflammation of the parts ; but if the passage of a stylet or other more complicated means are required, the assistance of a veterinary surgeon should be immediately obtained. The lachrymal sac into which the tears pass from the puncta has occasionally participated in the inflammation, and been distended and ruptured by the tears and mucus. This lesion is termed Fistula Lachrymalis. It has occasionally existed in colts, and will require immediate and peculiar treatment. SIMPLE OPHTHALMIA, OR COMMON INFLAMMATION OF THE EYE. The indications of common inflammation of the eye are so clear, that it never ought to be confounded with specific, for in it the external coverings of the eye alone are implicated ; we have engorgement of the conjunctival membrane, accompanied with a marked circumscribed opacity of the transparent cornea, and that is all ; there is no effusion in the anterior chamber, giving that discoloured muddy appearance so charac- lyo SPECIFIC OrilTHAUIIA teristic in specific ophthalmia ; the iris remains clear and bright, and tnt lens is unaffected. This common inflammation is generally sudden in its attack. It is occasionally connected with an attack of catarrh or cold; but it is as often unaccompanied by this, and depends on external irritation, as a blow, or the presence of a bit of hay-seed or oat-husk within the lid, and towards the outer comer where the haw cannot reach it : therefore the lids should always be carefully examined as to this possible source of the complaint. The lids will be found swollen, and the eyes partially closed, with more or less weeping, the inner surface of the eyelids red and tumid, and the cornea will either appear bright or cloudy, according to the extent of the injury. It not unfrequently happens when the injury has resulted from the lash of a whip, or a thorn, that the conjunctival membrane becomes lacerated ; and sometimes the injury extends to the cornea. Our first object by way of treatment should be to ascertain the cause of the mischief hj carefally examining the eye and the removal of any of- fending object. The animal should be placed in a cool but somewhat dark box, the eye should be bathed with warm water, laxative medicine given, and the animal kept on soft diet. If the inflammation be very acute, blood may be taken from the facial vein. In a few days the inflammation will generally subside, and then a weak solution of sulphate of zinc may be applied. When the acute inflammation has passed away, the cornea is sometimes left very tense and cloudy : we may now apply stimulants to its surface in the form of solution nitrate of silver (gr, viii to ^j aqua distillata), at first injected for twenty-four hours, and then ceasing for two or three days, and again employing it if necessary. When we get granulations on the cornea as the result of lesions, nitrate of silver must be applied in its pure state. SPECIFIC OPHTHALMIA, OR MOON-BLINDNESS. In this we have a far more formidable and destructive disease than the one just described ; it is, indeed, one of the opprobia of veterinary science, utterly bafiling all its resources and running its course erratically, indeed, but most surely and destructively. The aqueous humour often loses its transparency — even the iris changes its colour, and the pupil is exceed- ingly contracted. Indeed the term Iritis, or inflammation of the iris, will convey a much more intelhgible idea of the disease than any other, for it is this, with the other internal tissues of the eye, that especially suffer from its devastations. The external parts of the eye are comparatively but little impKcated, and suffer only in a comparative degree ; but see its effects on the iris, which gives the colouring and beauty to the eye, — its brilHancy is lost, its texture is broken down, it is a dark, discoloured curtain ; look at the symmetrical pupil with its fall rounded edge, — it is lacerated and torn, jagged and disfigured, as if mechanical destruction had torn it ; then its centre ornament, the beautiful lens, transparent as a crystal, clear as a diamond, is become disorganised, crushed, discoloured, a shapeless opaque lump, instead of the bright transparent conductor, — the light of heaven can no longer permeate it, and total blindness is the result. The veterinary surgeon has now an obstinate disease to combat, and one that will generally maintain its ground in spite of all his efforts. For three, or four, or five weeks, the inflammation will remain undiminished ; or if it appears to yield on one day, it will i-eturn in redoubled violence on the next. At length, and often unconnected with any of the means that have been used, the eye begins to bear the light, the redness of the membrane of the lid disappears, the cornea clears up, and the only vestige of disease which remains is a slight thickening of the lids, and apparent uneasiness when exposed to a very strong light. SPECIFIC OPHTHALMIA. 191 If the owner imagines that he has got rid of the disease, he mil be sadly disappointed, for, in the course of three weeks or a month, either the same eye undergoes a second and similar attack, or the other one becomes affected. All again seems to pass over, except that the eye is not so perfectly restored, and a shght, deeply-seated cloudiness begins to appear ; and after repeated attacks, and alternations of disease from eye to eye, the affair terminates in opacity of the lens or its capsule, attended ■with perfect blindness either of one eye or both. This affection was formerly known by the name of moon-bUndness, from its periodical return, and some supposed influence of the moon. That body, however, has not, and cannot have anything to do with it. What is the practitioner doing all this while ? He is an anxious and busy, but almost powerless spectator. He foments the eyes with warm water, or appHes cold lotions ; he bleeds, not from the temporal artery, for that does not supply the orbit of the eye, but from the facial vein, or he scarifies the lining of the lid, or subtracts a considerable quantity of blood from the jugular vein. The scarifying of the conjunctiva, which may be easily accomplished without a twitch, by exposing the inside of the lids, and drawing a keen lancet slightly over them, is the most effectual of all ways to abate inflammation, for we are then immediately unloading the distended vessels. He places liis setons in the cheek, or his rowels under the jaw ; and he keeps the animal low, and gives physic or fever medicine. The disease, however, ebbs and flows, retreats and attacks, until it reaches its natural termination, blindness of one or both eyes. Cart-horses are the most subject to this disease, and the period at which it generally appears is from the age of three to five years. He has then completed his growth. He is full of blood, and liable to inflammatory complaints, and the eye is the organ attacked from a peculiar predisposi- tion in it to inflammation, the nature and cause of which cannot always be explained. Every affection of the eye appearing about this age must be regarded with much suspicion. As this malady so frequently destroys the sight, and there are certaia periods when the inflammation has seemingly subsided and the inex- perienced person would be deceived into the belief that all danger is at an end, the eye should be most carefully observed at the time of purchase, and the examiner should be folly aware of all the minute indications of previous or approaching disease. There is nothing which deserves so much attention from the purchaser of a horse, as the perfect transparency of the cornea over the whole of its surface. The eye should be examined for this purpose, both in front, and with the face of the examiner close to the cheek of the horse, under and behind the eye. The latter method of looking through the cornea is the most satisfactory, so far as the transparency of that part of the eye is con- cerned. During this examination, the horse should not be in the open air, but in the stable, standing in the door-way and a little within the door. If there be thickening of the lids, or puckering towards the inner corner of the eye; a difference in the apparent size of the eyes; a cloudiness, although per- haps scarcely perceptible, of the surface of the cornea or more deeply seated, or a hazy circle round its edge ; a gloominess of eye generally, and dullness of the iris ; with the surface of the corpora nigra ragged and hanging down, or a minute, faint, dusky spot in the centre, with or without minute fibres or lines diverging from it, we may feel assured that inflammation has occurred at no very distant period, and there -will be every probability of its return. There is one little caution to be added. The cornea in its natural state is not only a beautiful transparent body, but it reflects, even in proportion to its transparency, many of the rays which fall upon it, and »«>2 SPECIFIC OPHTHALMIA. if there be a wliite object immediately before the eye, as a very h'ght waistcoat, or much display of a white neckcloth, the reflection may puzzle an experienced observer, and has raisled the careless one. The coat should be buttoned up, and the wliite cravat carefully concealed. The cause of this inflammation is undoubtedly a strong predisposition to it in the eye of the horse, but assisted by over exertion and the heated and empoisoned air of many stables. The heated air has much to do with the production of the disease ; the empoisoned air a great deal more ; for every one must have observed, on entering a close stable early in the morning, strong fames of ammonia, which were painful to his eyes, and caused the tears to flow. Wliat must be the constant action of this on the eyes of the horse? The dung of the horse, and the litter of the stables, when becoming putrid, emit fumes of volatile alkali or ammonia. Often, very soon after the evacuations are voided, they begin to yield an immense quantity of this pungent gas. If we are scarcely able to bear this when we stand in the stable for only a few minutes, we need not wonder at the prevalence of in- flanunation in the eye of the stabled horse, nor at the difficulty of abating inflammation while this organ continues to be exposed to such painful excitement. Stables are now much better ventilated than they used to be, and ophthalmia is far from being so prevalent as it was fifty years ago. This disease generally commences during the night, and is usually de- tected in the morning, as soon as the horse is turned in his stable to have his head and neck dressed. In many cases one eye only suffers, the attack lasting ten days or a fortnight, then subsiding, and returning periodically every three weeks or a month. When this is the case, the other eye en- tirely escapes, receiving additional value from its comparison with its un- fortunate fellow. But unfortunately this too often is not the case ; but on the subsidation of the attack in one eye, the mischief is brewing in the other ; it has to go through the same devastating process, and the result to both is derangement, worse almost in its effects than complete dis- organisation. The propagation of various diseases, and this more than any other, from the sire to his progeny, has not been sufiiciently considered by breeders. Let a stalHon that is blind, or whose sight is defective, possess every other point and quality that can be wished, yet he is worse than useless ; for a very considerable proportion of his offspring will most assuredly inherit weak eyes or become totally blind. There is no fact better estabhshed than this, there is no more positive proof of the existence of hereditary disease than this : in many instances the entire progeny of the blind sire or dam have been implicated in the destructive disease. The most frequent consequences of tliis disease are cloudiness of the eye, and cataract. The cloudiness is singular in its nature. It will change in twenty- four hours from the thinnest film to the thickest opacity, and, as suddenly, the eye will nearly regain its perfect transparency, but only to lose it, and as rapidly, a second time. The most barbarous methods have been resorted to for the purpose of removing tliis cloudiness. Chalk, and salt, and sugar, and even pounded glass have been introduced into the eye mechanically to rub off the film. It was forgotten that the cloudiness was the effect of inflammation ; that means so harsh and cruel were very Hkely to recall that inflammation ; that these rough and sharp substances must of necessity inflict excm- ciating pain ; and that, after all, it generally was not a film on the surface of the cornea, but a dimness pervading its substance, and even sinking deep within it, and therefore not capable of being removed. Where the cloudiness can be removed, it will be best effected by first abating inflam- mation, and then exciting the absorbents to take up the grey deposit, by SPECIFIC OPIITHALAIIA. I9S wasliing the eye Avith a very weak solution of nitrate of silver or sulpliato of zinc. Opacity of tlie lens is another consequence of specific inflammation. A wliite speck appears on the centre of the lens, which gradually spreads over it, and completely covers it. It is generally so white and pearly as not to be mistaken ; at other times it is more hazy, deceiving the inex- perienced, and occasioning doubt in the mind of the professional man. We have seen many instances in which the sight has been considerably affected, or almost lost, and yet the horse has been pronounced sound by very fair judges. The eye must be exposed to the light, and yet under the kind of shelter which has been already described, in order to discover the defect. The pupil of the horse is seldom black, like that of the human being, and its grepsh hue conceals the recent or thin film that may be spreading over the lens. Confirmed cataract in the eye of the horse admits of no remedy, for two obvious reasons : the retractor muscle draws the eye back so powerfully and so deeply into the socket, that it would be difficult to perform any operation ; and should an operation be performed, and the opaque lens removed, the sight would be so imperfect, from the rays of hght not being sufficiently converged, that the horse would be worse to us than a blind one. The man who has undergone the operation of couching may put a new lens before his eye, in the form of a convex spectacle ; but we cannot adapt spectacles to the eye of the horse, or fix them there. Since the publication of the first edition of ' The Horse,' some commu- nications have been made in the seventh volume of the ' Veterinarian' with regard to the occasional appearance and disappearance of cataract ■svithout any connection with the common moon-blindness. It is there stated, that cataracts might be formed in a fortnight or three weeks ; that many instances had been known in which they had been completed in less time, and without any previous apparent disease of the eyes ; and that they had been detected on examination, when the owners had not the sHghtest suspicion of disease in the eye. These cataracts, however, were very minute, and occasionally were found after a time to have disappeared. They differ entirely from the cataracts produced by the repeated attacks of specific ophthalmia, in being small and temporary, and in the other tissues of the eye remaining intact. That excellent veterinarian, Mr. Percivall, had a case of this description, A gentleman brought a horse one morning to the hospital, in consequence of its having fallen in his way to toA\Ti, and grazed his eyebrow. On examining him carefully, the cornea was partially nebulous, and a cataract was plainly visible. Neither of these defects was sufficient to attract the notice of any unprofessional observer, and both were unconnected with the sHght bruise produced by the fall. The owner was told that the corneal opacity might possibly be removed ; but as for the cataract he might regard this as beyond the reach of medicine. He returned with his horse on the fifth day, saying that the physic had operated well, and that he thought the eye was as clear as ever. Mr. Percivall examined the eye, and could discover no rehc either of the corneal opacity or of the cataract. The opinion respecting cataract is therefore essentially modified. It may not of necessity be the result of previous inflammation, although in the great majority of cases it is so, nor does it always lead to blinckiess. Still it is a serious thing at all times, and, although existing in the minutest degree, it is unsoundness, and very materially lessens the value of the horse. 'Were I asked,' says Mr. Percivall, 'how the practitioner could best distinguish a cataract of the above description from that which is of ordi- 0 194 GUTTA SERBXA. — GLAUCOMA. nary occurrence, and known by us all to constitute the common termina- tion of periodical oplitlialmia, I sliould say that the unusually lucid and healthy aspect which every other part of the eye presents is our best diagnostic sign ; the sHghtest indication, however, or the shghtest suspicion of prior or present inflammation, being a reason for coming to a different conclusion. As to the period of time a cataract of this species, supposing it to be membranous, would requu-e for its formation, I should apprehend that its production might be, as its disappearance often would seem to be, the work of a very short interval, perhaps not more than five or six days.' As to the cause and treatment of it, we are at present completely in the dark. If it does not soon disappear, the hydriodate of potash administered internally might offer the best prospect of success. AMAUROSIS, OR GUTTA SERENA. Another species of blindness, and of which mention was made when de- scribing the retina, is Gutta Serena, commonly called glass eye. The pupil is more than usually dilated: it is immovable, bright, and glassy, and the animal is totally blind. This is palsy of the optic nerve, or its ex- pansion, the retina. It may be produced by several causes, such as from a blow on the head, internal hcemorrhage, pressure, the result of tumours, or effusion upon that particular part of the brain from whence the optic nerves ai-ise, from some disease of the retina itself, or as the re- sult of debihtating diseases. The treatment of Gutta Serena is quite as difficult as that of cataract. We have heard of successful cases, but we never saAv one ; nor should we be disposed to incur much expense in endea- vourino- to accomplish impossibihties. If it proceed from injuries such as blows, &c., warm fomentations should be employed and setons insei'ted, laxative medicines being given ; if from debihty we should allow nutritious food, and give vegetable and mineral tonics. If we succeed it must be by constitutional treatment. As to local treatment, the seat of disease is out of our reach. GLAUCOMA. This is a disease occasionally met -v^ith as a termination of ophthalmia, and known by the name of green cataract ; but it is much more frequently met with as a result of age in very old horses. On examination the pupil wLU be found dilated, and the interior of the eye presenting a peculiar sea-green appearance, the animal being blind. It is a diseased condition of the vitreous humour, and admits of no reHef. DISEASES OF THE EAR. Wounds of the ear are usually the consequence of careless or bruta] treatment. The twitch may be appHed to it, when absolute necessity re- quires this degree of coercion ; but troublesome ulcers and bruises have been the consequence of the abuse of this species of punishment, and more especially has the farrier done irreparable mischief when he has binitally made use of his plyers. These bruises or wounds will generally — fortunately for the animal, and fortunately, perhaps, for the brute that inflicted the injury — speedily heal ; but occasionally sinuses and abscesses will result that bid defiance to the most skilful treatment. A simple laceration of the cartilage is easily remedied. The divided edges arc brought into apposition, and the head is tied up closely for a few days, and all is well ; but, occasionally, ulceration of the inteo-ument and cellular substance, and caries of the cartilage, will take place — deep sinuses will be formed, and the wound will bid defiance DISEASES OP THE EAR — DEAFXESS. 105 TO the most skilful treatment. The writer of this work had once a case of this kind under his care more than two mouths, and he was at length com- pelled to cut off tho ear, the other ear following it, for the sake of uni- formity of appearance. Tho lunar caustic, or the muriate of antimony, or the heated iron, must be early employed, or the laboui" of the practitioner will be in vain. It has been the misfortune of the same person to witness two cases in ■which the auditory passage was closed and the faculty of hearing de- Btroyed, by blows on the ear violently inflicted. No punishment can be too severe for these brutes in human shape. Whenever there is consider- able swelling about the root of the ear, and the fl.uctuation of a fluid within can be detected, it should be immediately opened with a lancet, and the purulent fluid liberated. The abscess usually begins to form about the middle of the conch, or rather nearer the base than the point. The incision should be of con- siderable length, or the opening will close again in four-and- twenty hours. The purulent matter having been evacuated, the incision should not be per- mitted to close until the edges of the ulcer have adhered to each other, and the abscess is obliterated. The size and the carriage of the ear do not always please. The ears may be larger and more dependent than fashion requires them to be, and this is remedied by an operation. On either side of the projection of the occipital bone, and in a straight line forward and backward, a fold of the skin is pinched up and cut away. The divided edges on either side are then brought together, and confined by two or three stitches — they presently unite, and the owner has a better-looking horse, and soon forgets or cares not about the punishment which he has inflicted on him. The ears of other horses may be supposed to be too close to each other. This fault is corrected by another piece of cruelty. Similar shps of skin are cut away on the outside of the base of the ear, and in the same direc- tion. The edges of the wound are then brought together, confined by sutures, and the ears are drawn further apart from each other, and have different directions given to them. A very sHght examination of either of the horses will readily detect the imposition. DEAPNESS. Of the occasional existence of this in the horse, there is no doubt. The beautiful play of the ears has ceased, and the horse hears not the voice of his master, or the sound of the whip. Much of the apparent stupidity of a few horses is attributable to their imperfect hearing. It occasionally appears to follow the decline of various diseases, and especially of those that affect the head and the respiratory passages. It has been the conse- quence of brutal treatment closing the conduit of the ear, or ruptui-ino- the tympanum ; and it is certainly, as in other domesticated animals, the ac- companiment of old age. In the present state of veterinary knowledge it is an incurable complaint; the only thing that can be done is not to punish the poor slave for his apparent stupidity, produced perhaps by over-exertion in our service, or, at least, the natural attendant of the close of a Hfe devoted to us. OSL 196 THE ANATOMY CHAPTER X. THE ANATOMY AND DISEASES OF THE NOSE AND MOUTH. We now proceed to a description of the face, or lower part of the liead of tlie Horse. The nasal bones, or bones of the nose (J j, p. 145), are con- nected with the frontal bones above, and with the lachrymal, i i, and the bones of the upper jaw, I I, on either side. They are united together by a plain suture, which is a continuation of the frontal, and they ter- minate in a point at the nostril (p, p. 145). They are rounded and arched above, because they are exposed to occasional violence and injury, which the arch-form will enable them best to resist ; and at the base of the arch, where the main strength should be, they are overlapped by the upper jaw- bone, as the temporal bone overlaps the base of the parietal. These bones form a principal part of the face ; and the length or shortness, and the character of the face, depend upon them. Sometimes there is an appear- ance of two Kttle arches, with a depression between them along the sutures. This is often found in the blood-horse, with his comparatively broad head and face. The single elevated arch is found in the long and narrow face of the heavy draught-horse. The nasal bones pursue their course down the face, in some horses in a straight line — in others, there is a slight prominence towards the upper part, while in a considerable number, a depression is observed a little lower down. Some persons have imagined that this deviation in the line of the face affords an indication of the temper of the animal, and there may be a httle truth in this. The horse with a straight profile may be good or bad tempered, but not often either to any great excess. The one with the prominent Roman nose will generally be an easy, good-tempered kind of beast — hardy — ready enough to feed, not always, perhaps, so ready to work, but may be made to do his duty without any cruel urging, and havino- no extraordinary pretension to speed or blood. On the other hand, a depression across the centre of the nose generally indicates some breeding, especially if the head is small, but occasionally accompanied by a vicious, uncontrollable disposition. There is another way, however, in which the nasal bones do more certainly indicate the breed, viz., by their comparative length or shortness. There is no surer criterion of a well-bred horse, than a broad angular forehead, prominent features, and a short face ; nor of a horse with little breeding, than a narrow forehead, small features, and lengthened nose. The comparative development of the head and face indicates, Avith little error, the preponderance of the animal or intellectual principle. These bones form the roof of an important cavity — the nasal cavity, as shown in the cut (a, a, p. 197). The sides are constituted above by the nasal bones, and, lower down, by the upper jawbones (superior onaxillaries), while plates from these latter bones project and compose the palate, which is both the floor of the nose and the roof of the mouth (b,h). Above is a bone called the palathie (c), although it contributes very Httle to the fonnation of the palate. It is the termination of the palate, or the border of the opening where the cavities of the mouth and nose meet. The frontal sinuses and large vacuities in the upper jaw-bone, and in the sethmoid and sphenoid bones, communicate with and enlarge the cavity of the nose. OF THE NOSE AND MOUTH. 197 This cavity is divided into two pai-ts by a cartilage called the Septum {(], d). It is of considerable thickness and strength, and divides the cavity of the nose into two equal parts. It is placed in the centre for the purpose of strength, and it is formed of cartilage, in order that, by its gradually yielding resistance, it may neutralise almost any force that may be applied to it. Wlien we open the nostril, we see the membrane by which the cartilage, and the whole of the cavity of the nose, is lined, and by the colour of which, much more than by that of the lining of the eyelids, we judge of the degi-ee of fever, and particularly of inflammation of the lungs, or any of the air- passages. The above cut shows the ramifications of the blood-vessels, both arterial and venous, on the membrane of the nose. It beautifully accounts for the accurate connection which we trace between the colour of the nasal membrane, and various diseases or states of the circulation. By the sore places or ulcerations discovered on this membrane, we likewise determine respecting the existence of glanders ; and the inter- position of the septum is a wise and benevolent provision to hinder the spread of the mischief, by cutting off all communication with the neigh- bouring parts, and also to preserve one nostril pervious, when the other is diseased or obstructed. The nasal cavity is, on either side, occupied by two bones, which, from their being rolled up somewhat in the form of a turban, are called the turhinafcd or Uirhan-slmped bones. They are as thin as gauze, and perfoi-ated like gauze, with a thousand holes. Between them are left sufficient passages for the air. If they were unrolled, they would present a very considerable surface ; and on every part of them is spread the substance or pulp of the olfactory or first pair of nerves. These bones, lined with delicate membranes and covered by the olfactory nerves, are the seat of smell ; and they are thus expanded, because the sense of smell in the horse must, to a very consider- able degree, supply the place of the sense of touch and the lessons of ex- perience in the human being. By this alone he is enabled to select, amongst the nutritive and poisonous herbage of the meadow, that which would support and not destroy him. The troops of wild horses are said to smell the approach of an enemy at a very considerable distance. In his domestic state, the horse does not examine the different food which is placed before him with his eye, but with his nose ; and if the smell displeases him no coaxing will induce him to eat. He examines a stranger by the smell, and, by very intelligible signs, expresses the opinion which he forms of him by this inquisition. The horse will eviden tally recognise his favourite groom when he has nothing else to indicate his approach but the sense of smell. These cavities are likewise organs of voice. The sound reverberates 198 THE MUSCLES, NERVES, AND BLOOD-VESSELS. through them, and increases in loudness, as through the windings of a French horn. The extension of the nostril at the lower part of these cavities is an important part of the face, and intimately connected with breeding, courage, and speed. The horse can breathe only through the nose. All the air which goes to and returns from the lungs must pass through the nostrils. In the common act of breathing, these are sufficiently large ; but when the animal is put on his speed, and the respiration is quickened, these passages must dilate, or he will be much distressed. The expanded nostril is a striking feature in the blood-horse, especially when he has been excited and not over-blown. The sporting man will not forget the sudden effect which is given to the countenance of the hunter, when his ears become erect, and his nostrils dilate as he first listens to the cry of the hounds, and snorts, and scents them afar off. The painful and spasmed stretching of this part, in the poor over-driven post-horse, will show how necessaiy it is that the passage to the lungs should be free and open. The nostrils should not only be large, but the membranous substance which covers the entrance into the nose should be thin and elastic, that it may more readily yield when the necessity of the animal requires a greater supply of air, and afterwards return to its natui'al dimensions. Therefore, nature, which adapts the animal to his situation and use, has given to the cart-horse, that is seldom blown, a confined nostril, and surrounded by much cellular substance, and a thick skin ; and to the horse of more breeding, whose use consists in his speed and his continuance, a wider nostril, and one much more flexible. The inhabitants of some countries were accustomed to slit the nostrils of their horses that they might be less distressed in the severe and long- continued exertion of their speed. The Icelanders do so to the present day. There is no necessity for this, for nature has made ample provision for all the ordinaiy and even extraordinary exertion we can require from the horse. Some very powerful muscles proceed from different parts of the face to the neighbourhood of the nostrils, in order to draw them back and dilate them. Four of these are given in the next cut, which is introduced to com- plete our present subject, and which will be often referred to in the course of our work ; I, m, o, and 2^, are muscles employed for this purpose. There are also four distinct cartilages, attached to the nostrils, which, by their elasticity, bring back the nostrils to their former dimensions, as soon as the muscles cease to act. The bones of the nose (p, p. 145) are also sharpened off to a point, to give wider range for the action of the muscles ; while the cartilages are so contrived, as not only to discharge the office we have mentioned, but to protect this projection of bone from injury. There are two circumstances, which, more than any others, will enable not only the veterinary surgeon, but the owner of a horse also, accurately to judge of the character and degree of many diseases, and to which very few persons pay sufficient attention ; these are the pulse, of which we shall pre- sently speak, and the colour of the membrane of the nose. It is the custom of most veterinary surgeons and horse-men to lift the upper eyelid, and to form their opinion by the colour which its lining presents, K it is very red, there is considerable fever; if it is of a pale pinkish hue, there is little danger. The nose, however, is more easily got at ; — the surface presented to tlie view is more extensive ; — its sympathy with almost all the important organs is greater ; — and the changes produced by disease are more striking and more conclusive. Let the reader first make himself well acquainted ■nath the uniform pale pink appearance of that portion of the membrane OF THE HEAD AND UPrER TART OF THE NECK. 199 which covers the lo.ver part of the cartilaginous partition l^^^ween the rprl sho\vino- the half snbdnecl, but Still exisung lev t-i +^ -UooUViTr L hou^rsomewhat redder than natural, P-^-ting a i^turn to heaH^^^^ the suspicion oi iuikuij, Tinoao with all their shades of difference, stagnation of the vital current. These, ^^^^^^^^ J^Yt everv one who has ^vilT be guides to his opinion and treatment, which every one wno nas studied them will highly appreciate. THE MUSCLES, KEKVES, ANB BLOOD-VESSELS OF THE HEAD AND UPPEK PART OF THE NECK. rt The upper part of the ligament of the neck. _ +,,hprele of the occiput, ;; The levator hmeri (elexator of the shoulder), arising ^^^^^^^^^^^ tj,e TraBsvLe arm to dmw forward the shoulder and arm; or turn the head and neck, and, when the two levators act, to depress the head. , , . , r„f l,•^..«^• to the . Tl,, SS.t»r,7/»ri< from the stTloid (pmcil-sl,ap«l) or cor»coid (l,™k.sl,apea\process assist in closine the mouth and chewing the food „•„„ +^« lul, A The oTi«n.s palU-n.n (circular), --oundnig t We ^-^ f^.^^^Xt^'^^ ,, i The zygomaticus, from the zygomatic arch and massetei to tne corner oi draw back the angle of the mouth. 200 NASAL POLYPUS. i The buccinator (trumpeter), from the inside of the mouth and cheeks, to the angle ol the mouth, to draw it back. ' The nasalis longus labii superioris (belonging to the nose and upper lip), from a depres- sion at the junction of the superior maxillary, lachrymal, and malar bones to the upper lip : to raise the lip and dilate the nostrils. m n Levator labii superioris alceque nasi, from the junction of the lachrymal, nasal, and superior maxillary bones, to the upper lip and false nostril : to raise the lip and dilate the nostril. 0 Eetractor labii inferioris (puller back of the under lip), to the sides of the inferior maxilla and under lip : to draw it back. p Orbicularis oris (circular muscle of the mouth), surrounding the mouth : to close the lips. q The upper portion of the parotid gland (gland near the ear) reversed, to show the blood- vessels and nerves beneath it. r The parotid duct piercing the cheek, to discharge the saliva into the mouth. s The maxillary gland (gland of the lower jaw) -vrith its duct. t The jugular (neck) vein, after the two branches have united. u At this letter, the submaxillary artery, a branch of the jugular, and the parotid duct piiss under and within the angle of the lower jaw ; they come out again at w, and chmb up the cheek. V The temporal vein and artery, passing under the zygomatic arch. X y The motor nerves of the face, emerging from under the parotid gland. z Branches of both nerves, with small blood-vessels. NASAL POLYPUS. By a polypus is meant an excrescence or tumour, varying in size, structure, and consistence, and attached by a pedicle to a mucous surface. The true polypus is attached to mucous membranes, and is usually found in the nostrils, the pharynx, the uterus, or the vagina. Tumours have been seen hanging loose in the veins and ventricles of the heart ; and in the larger blood-vessels there have been accumulations of the fibrine of the blood, with peduncular attachments. The nasal polypus usually adheres to some portion of the superior turbi- nated bone, or it has come from some of the sinuses connected, with that cavity. It escaped, while small, through the valvular opening under the superior turbinated bone into the cavity of the nose, and. there attained its fall growth. No better account, however, can be given of the cause of their appear- ance than that of tumours in other parts of the body. They evidently have a constitutional origin : they are frequently hereditary, and the animal in which they have once appeared is subject to a return of them. By some means, probably the increasing weight of the tumour, and being La a dependent situation, the polypus is gradually detached from its base, and forces with it the soft and easily distensible membrane of the nose. As it contiaues to descend, this portion of membrane is farther elongated, and forms the pedicle or root of the tumour ; — if that may be termed a root which is a mere duplicate of its investing membrane. The polypus, when it hangs free in the nasal cavity, is usually of a pyri- form or pear- like shape ; and it varies in weight, from a few drachms to three or four pounds. How is the surgeon to proceed ? Can he lay hold of the polypus by the finger, or the forceps, or (for these tumours do not possess much sensi- bility) the tenaculum ? To ascertain this, he will cast the horse, and fix the head in a position to take the greatest advantage of the light. If he cannot fairly get at the tumour by any of these means, he will let it alone. It will continue to grow — the membrane constituting the pedicle will be lengthened — and the polypus will at length descend, and be easily got at. Time and patience will effect wonders in this and many similar cases. NASAL GLEET. 201 Supposing it to have grown, and the surgeon is endeavouring to extract it, he must not use any great force. It must not be torn out by the root ; the tumour must be gently brought down, and a ligature passed I'ound the pedicle, as high up as it can conveniently be placed. If the polypus can then be returned to the nose, the animal will suffer very Uttle incon- venience ; and in a few days it will slough off, and the pedicle will contract, and gradually disappear. If the polypus is so large that it cannot be well returned after it has been brought down, we must, notwithstanding, use the ligature, passing it round the pedicle sufficiently tightly to cut off the supply of blood to the tumour. We may then immediately excise it. Except the pedicle is ex- ceedingly thick, there will be little or no haemorrhage. Should some bleeding occur, it will probably soon stop, or may be stopped by the cautery, which should, however, be avoided if possible, for our object is to produce as httle irritation as may be in the membrane, and the actual cautery will be applied with considerable difficulty in the cavity of the nose. In very bad cases, when the tumour cannot be drawm out of the nose, it may be necessary to slit up the ala or side of the nostril. It will be better, however, not to cut through the false nostril, for that consists of a duphca- tore of such thin integument, that the stitches can hardly be retained in it, when the horse will be continually snorting at the least inconvenience. It will also be difficult to bring the edges of this thin membrane accurately together again, or, if this be effected, there is scarcely life enough in it for the parts readily to unite. The false nostril should be avoided, and the incision made along the lateral edge of the nasal bone, beginning at its apex or point. The flap will then conveniently turn down, so as to expose the cavity beneath ; and there will be sufficient muscular substance to secure an almost certain union by the first intention. The nostril being opened, the pedicle will probably be displayed, and a ligature may be passed round it, as already recommended ; or if it is not actually in sight, it may probably gradually be brought within reach. NASAL GLEET, OR DISCHARGE FROM THE NOSE. There is a constant secretion of fluid to lubricate and moisten the mem- brane that lines the cavity of the nose, and which, under catarrh or cold, is increased in quantity, and altered in appearance and consistence. This will properly belong to the account of catarrh or cold ; but that which is immediately under consideration is a continued and oftentimes profuse discharge of thickened mucus, when every symptom of catarrh and fever has passed away. If the horse is at grass, the discharge is almost as green as the food on which he Kves ; — or if he is stabled, it is white, or straw- coloured, or brown, or even bloody, and sometimes purulent. It is either constantly running, or snorted out in masses many times a day ; teasing the horse, and becoming a perfect nuisance in the stable, and to the rider. This has been known to continue several months, and eventually to destroy the horse. The discharge is sometimes confined to one nostril, and there may exist considerable tumefaction of the submaxillary glands, which has caused this disease to be mistaken for glanders. Should any doubt exist, no time should be lost in obtaining the opinion of a veterinary surgeon respecting its nature. If the discharge is not offensive to the smell, nor mixed vdth purulent matter, it is probably merely an increased and somewhat vitiated secretion from the cavities of the nose ; and all fever having disappeared, will fre- quently yield to small doses of blue vitriol, given twice in the day. If 302 OZEKA. the discliarge is considerable and mingled witli pns, we may conclude, that the disease has extended to the sinuses of the head, and that abscesses have formed, most hkelj, in the frontal sinus. The discharge being very offensive, will indicate that the disease has extended to the bones and cartilage. The treatment should consist of the internal administration of sulphate of copper, either mingled with the animal's corn, or in combina- tion with ginger and gentian, continued for a considerable time, for this is ft disease wliich will not very quickly yield to treatment. The animal should be kept on the most nutritious diet, great attention being paid to cleanliness. If the discharge does not yield to this treatment, the next course to adopt vnU be to open the sinuses of the head with the trephine (the method of doing this will be described under ' Operations'), and after having well syringed the parts with warm water, inject some astringent solution, such as the sulphate of zinc or copper. The injection should be at first weak, but gradually increased in strength. If the discharge con- tinue for a length of time, without yielding to treatment, there is danger of its terminating in glanders. OZENA. Ozena is ulceration of the membrane of the nose not always or often visible, but recognised by the discharge of muco-purulent matter, of a peculiar foetor, from which the disease derives its name. It resembles s^landers in being confined in most instances to one nostril, and the sub- maxillary gland on the same side being enlarged ; but differs from it, in the gland not being adherent, and the discharge, from its earliest stage, being purulent and stinking. There is sometimes a foetid discharge from the nostril in consequence of mflammation of the lungs, or produced by some of the sequelae of pneu- monia ; distinguished, however, from ozena by its usually flowing irregu- larly, being coughed up in great quantities, more decidedly purulent, and the gland or glands seldom affected. The discharge from ozena is con- stant, muco-purulent, and attended by enlargement of the glands. It is of immense consequence that we should be enabled to distinguish the one from the other ; for while ozena may, sometimes at least, be manageable, the other is too frequently the precursor of death. The cause of ozena cannot always be discovered. Chronic inflammation of the membrane may assume another and malignant character. In severe catarrh the membrane may become abraded, and the abrasions may de- generate into foul and foetid ulcers. It is not an unfrequent consequence of epidemic catarrh. It has been produced by caustic appHcations to the lining membrane of the nose. It has followed hEemorrhage, spontaneous, or the consequence of injury. In some cases, and those as obstinate as any, it cannot perhaps be traced to any probable cause, and the health of the animal has not appeared to be in the slightest degree affected. The membrane of the nose is highly sensitive and ii'ritable, and an ulcer, in whatever way formed on it, does not readily heal. It often runs on to gangrene, and destroys not only the membrane, but the bone beneath and evijn the cartilaginous septum. This is rarely the case in glanders ; and the ravages of the chancrous ulcers are usually confined to the membrane. The ulceration proceeds to a certain point — its progress is then arrested, usually by nature alone — the discharge gradually lessens — it loses its offensive character, and at length ceases. Local applications are seldom available in the treatment of this disease ; for we know not the situation of the ulcer, and if we did, we probably GLANDERS. 208 could not get at it. Some have recommended setons. "Wliere are they to be applied ? K the seat of ulceration is unknown, the seton may only give useless pain. Several po.<;f-w?o?'/e?H examinations have shown that the frontal sinuses are a frequent seat of the disease. Tet what injection could we use ? An emollient one would be thrown away. A stimulating injection might convert ozena into glanders. Other examinations ha^e shown that the superior portion of the central meatus was diseased. What instrument can be contrived to reach that ? Internal medicines are almost thrown away in this complaint : yet something, perhaps, may be done under the form of a local application. The discarded nose-bag (under- valued at least by too many practitioners) will afford the means of em- ploying an emollient fomentation. The steam from a bran-mash, scalding hot, will probably reach every part of the nasal cavity, and so afford some chance of being beneficially applied to the ulcer. It will, at least, thoroughly cleanse the part. By means of the Tvose-bag and the warm mash, the chloride of lime may be introduced into the cavity, not only combining with the extricated gases, and removing the foetor, but arresting the tendency to decomposition. Then there is a digestive — a gentle stimulus to abraded and ulcerated surfaces, rousing them to healthy action, and without too much irritating them — turpentine. This may be applied in the form of vapour, and in the best of all ways, by using the best yellow deal shavings instead of bran. This digestive may be brought into contact with every part of the Schneiderian membrane, and has been serviceable. There is another resource, and one that bids fairer to be successful than any other with which we are acquainted — the spring grass. It is the finest alterative, depurative, and restorative in our whole materia medica ; and if it is accessible in the form of a salt marsh, there is no better chance of doing good. GLANDERS. The most formidable of all the diseases to which the horse is subject is Glanders. It has been recognised from the time of Hippocrates of Cos ; and few modern veterinary wi-iters have given a more accurate or com- plete account of its symptoms than is to be found in the works of the father of medicine. Three-and-twenty hundred years have rolled on since then, and veterinaiy practitioners are not yet agreed as to the tissue primarily affected, nor the actual nature of the disease : we only know that it is at the present day, what it was then, a loathsome and an incu- rable malady. TVe shall therefore, in treating of this disease, pursue our course sloTdy and cautiously. The earhest symptom of Glanders is an increased discharge from the nostril, small in quantity, constantly flo^ving, of an aqueous character and a little mucus mingling with it. Connected with this is an error too general, and highly mischievous, with regard to the character of this discharge in the earhest stage of the disease, when, if ever, a cure might be effected, and when, too, the mischief from contagion is most frequently produced. The discharge of glanders is not sticky when it may be first recognised. It is an aqueous or mucous, but small and constant discharge, and is thus distinguished from catarrh, or nasal gleet, or any other defluxion from the nostril. It should be im- pressed on the mind of every horseman that this small and constant defluxion, overlooked by the groom and by the owner, and too often by the veterinary surgeon, is a most suspicious cii'cumstance. Mr. James Turner deserves much credit for having first or chiefly 904 GLANDERS. directed the attention of horsemen to this important but disregarded symptom. If a horse is in the highest condition, yet has this small aqueous constant discharge, and especially from one nostril, no time should be lost in separating him from his companions. No harm will be done by this, although the defluxion should not ultimately betray lurking mischief of a worse character. Mr. Turner relates a case very much in point. A farmer asked his opinion respecting a mare in excellent condition, with a sleek coat, and in fall work. He had had her seven or eight months, and during the whole of that time there had been a discharge from the right nostril, but in so slight a degree as scarcely to be deemed worthy of notice. He now wanted to sell her, but, like an honest man, he wished to know whether he might warrant her. Mr. Turner very properly gave it as his opinion, that the discharge having existed for so long a time, he would not be justified in sending her into the market. A farrier, however, whose ideas of glanders had always been connected with a sticky discharge and au adherent gland, bought her, and led her away. Three months passed on, when Mr. Turner examining the post-horses of a neighbouring inn, discovered that two of them were glandered, and two more farcied, while, standing next to the first that was attacked, and his partner in work, was his old acquaintance the farmer's mare, with the same discharge from her nostril, and who had, beyond question, been the cause of all the mischief. The peculiar viscidity and gluiness which is generally supposed to distinguish the discharge of glanders from all other mucous and prevalent secretions belongs to the second stage of the disease, and, for many months before this, glanders may have existed in an insidious and highly contagious form. It must be acknowledged, however, that, in the majority of cases, some degree of stickiness does characterise the discharge of glanders from a very early period. It is a singular circumstance, for which no satisfactory account has yet been given, that when one nostril alone is attacked, it is, in a great majority of cases, the near, or left. M. Dupuy, the director of the veterinary school at Toulouse, gives a very singtdar account of this. He says that, out of eighty cases of glanders that came under his notice, only one was affected in the right nostril. The difference in the affected nostril does not exist to so great an extent in Great Britain ; but in two horses out of three, or three out of four, the discharge is from the left nostril alone. We might account for the left leg failing oftener than the right, for we mount and dismount on the left side ; the horse generally leads with it, and there is more wear and tear of that limb : but we cannot satisfactorily account for this usual affection of the left nostril. It is true that the reins are held in the left hand, and there may be a httle more bearing and pressure on the left side of the mouth ; but this appHes only to saddle-horses, and even with them does not sufficiently explain the result. This discharge, in cases of contagion, may continue, and in so slight a degree as to be scarcely perceptible, for many months, or even two or three years, unattended by any other disease, even ulceration of the nostril, and yet the horse being decidedly glandered from the beginning and capable of propagating the malady. In process of time, however, pus mingles with the discharge, and then another and a characteristic symptom appears. Some of this is absorbed, and the neighbouring glands become affected. If there is a discharge from both nostrils, the glands within the xmder jaw will be on both sides enlarged. If the discharge is from one nostril only, the swelled gland will be found on that side alone. Glanders, however, will frequently exist at an early age without these swelled glands, and some GLANDERS 206 Other diseases, as catarrh, will produce them. Then we must look out for some peculiarity about these glands, and we shall readily find it. The swelling may be at first somewhat lai"ge and diffused, but the sui-rounding L-nlargement soon goes off, and one or two small distinct glands remain ; and they are not in the centre of the channel, but adhere closely to the jaw on the affected side. The membrane of the nose should now be examined, and will materially guide our opinion. It will either be of a dark purplish hue, or almost of a leaden colour, or of any shade between the two ; or if there is some of the reaness of inflammation, it will have a pui'ple tinge : but there "will never be the faint pink blush of health, or the intense and vi\"id red of usual inflammation. Spots of ulceration will probably appear on the membrane covering the cartilage of the nose — not mere sore places, or streaks of abrasion, and quite superficial, but small ulcers, usually approaching to a circular form, deep, and with the edges abrupt and prominent. When these appearances are observed, there can be no doubt about the matter. Care should be taken, however, to ascertain that these ulcers do actually exist, for spots of mucus adhering to the membrane have been more than once taken for them. The finger should, if possible, be passed over the supposed ulcer, in order to determine whether it can be wiped away ; and it should be recollected, as was hinted when describing the duct that conveys the tears to the nose, that the orifice of that duct, just within the nostril, and on the inner side of it, has been mistaken for a chancrous ulcer. This orifice is on the continuation of the common skin of the muzzle which runs a Httle way up the nostril, while the ulcer of glanders is on the proper membrane of the nose above. The Hue of separation between the two is evident on the slightest inspection. When ulcers begin to appear on the membrane of the nose, the con- stitution of the horse is soon evidently affected. The patient loses flesh — his belly is tucked up — his coat unthrifty, and readily coming off — the appetite is impaired — the strength fails — cough, more or less urgent, may be heard — the discharge from the nose will increase in quantity ; it will be discoloured, bloody, offensive to the smell — the ulcers in the nose "ndll become larger and more numerous, and the air-passages being obstructed, a grating, choking noise will be heard at every act of breathing. There is now a peculiar tenderness about the forehead. The membrane lining the frontal sinuses is inflamed and ulcerated, and the integument of the forehead becomes thickened and somewhat swelled. Farcy is now super- added to glanders, and more of the absorbents are involved. At or before this time little tumoui-s appear about the muscles, and face, and neck, following the course of the veins and the absorbents, for they run side by side ; and these tumours soon ulcerate. Tumours or buds, still pursuing the path of the absorbents, soon appear on the inside of the thighs. They are connected together by a corded substance. This is the inflamed and enlarged lymphatic ; and ulceration quickly follows the appearance of these buds. The deeper-seated absorbents are next affected ; and one or both of the hind-legs swell to a great size, and become stiff, and hot, and tender. The loss of flesh and strength is more marked everj^ day. The membrane of the nose becomes of a dirty li\-id colour. The membrane of the mouth is strangely pallid. The eye is infiltrated with a yellow fluid ; and the discharge from the nose becomes more profuse, and insufferably offensive. The animal presents one mass of putrefaction, and at last dies exhausted. The enlargement of the submaxillary glands, as connected with this disease, may, perhaps, require a little farther consideration. A portion of the fluid secreted by the membrane of the nose, and altered in chai-acter 206 GLANDERS. bj the peculiar mflammation there existing, is absorbed ; and as it is con- veyed along the lymphatics, in order to arrive at the place of its destina- tion, it inflames them, and causes them to enlarge and suppurate. There is, however, a peculiarity accompanying the inflammation which they take from the absorption of the virus of glanders. They are rarely large, except at first, or hot, or tender ; but they are characterised by a singular hardness, a proximity to the jaw-bone, and, frequeutl}'', actual adhesion to it. The adhesion is produced by the inflammatory action going forward in the gland, and the effusion of coagulable lymph. This hardness and adhesion accompanying discharge from the nostril, and being on the same side with the nostril whence the discharge proceeds, afford proof not to be controverted that the horse is glandered. Notwithstanding this, however, there are cases in which the glands are neither adherent nor much en- larged, and yet there is constant discharge from one or both nostrils. The veterinary surgeon would have Uttle hesitation in pronouncing them to be cases of glanders. He vdll trust to the adhesion of the gland, but he will not be misled by its looseness, nor even by its absence altogether. Glanders has often been confounded with strangles, and by those who ought to have known better. Strangles are pecuhar to young horses. The early stage resembles common cold, with some degree of fever and sore throat — generally vrith distressing cough, or at least fi-equent wheezing ; and when the enlargement appears beneath the jaw, it is not a single small gland, but a swelling of the whole of the substance between the jaws, grovsdng harder towards the centre, and, after a while, appearing to contain a fluid, and breaking. In strangles the membrane of the nose will be intensely red, and the discharge from the nose profuse and purulent, or mixed vsdth matter almost from the first. When the tumour has burst, the fever will abate, and the horse wall speedily get well. Should the discharge from the nose continue, as it sometimes does, for a considerable time after the horse has recovered fi'oni strangles, there is no cause for fear. Simple strangles need never degenerate into glanders. Good keep, and small doses of tonic medicine, will gradually perfect the cure. Glanders has been confounded with catarrh or cold ; but the distinc- tion between them is plain enough. Fever, and loss of appetite and sore throat, accompanying cold — the quidding of the food and gulping of the water are sufficient indications of the latter of these ; the discharge from the nose is profuse, and perhaps purulent ; the glands under the jaw, if swelled, are moveable, there is a thickening around them, and they are tender and hot. With proper treatment the fever abates ; the cough dis- appears ; the swellings under the throat subside ; and the discharge from the nose gradually ceases, or, if it remains, it is usually very different from that which characterises glanders. In glanders there is seldom cough of any consequence, and generally no cough at aU. A running from the nose, small in quantity, and, from the smallness of its quantity, drying about the edges of the nostril, and presenting some appearance of stickiness, wiU, in a few cases, remain after severe catarrh, and especially after the influenza of spring ; and these have gradually assumed the character of glanders, and more particularly when they have been accompanied by enlarged glands and ulceration in the nose. Here the aid of a judicious veterinary surgeon is indispensable ; and he will sometimes experience considerable difficulty in deciding the case. One circumstance will principally guide him. No disease will run on to glanders which has not, to a considerable and palpable degree, impaired and broken down the constitution ; and every disease that does this will run on to glanders. He will look then to the general state and condition GLANDERS. 20? of the horse, as well as to the situation of the glands, the nature of tho discharge, and the character of the ulceration, K, after all, he is in doubt, an experiment may be resorted to, which wears indeed the appearance of cruelty, and which only the safety of a valuable animal, or of a whole team, can justify. He will inoculate an ass, or a horse ah-eady condenmed to the hounds, with the matter discharged from the nose. If the horse is glandered, the symptoms of glanders or farcy will appear in the inoculated animal in the course of a few days. The post-mortevi examination of the horse will remove every doubt as to the character of the disease. The nostril is generally more or less blanched, ^\dth spots or lines of inflammation of considerable intensity. Ulceration is almost invariably found, and of a chancrous character, on the septum, and also on the aethmoid and tui-binated bones. The idcers evidently follow the course of the absorbents, sometimes almost confined to the track of the main vessel, or, if scattered over the membrane gene- rally, thickest over the path of the lymphatic. The cethmoid and turbinated bones are often filled Avith pus, and sometimes eaten through and carious ; but, in the majority of cases, the ulceration is confined to the external membrane, although there may be pus within. In aggravated cases the disease extends thi'ough all the cells of the face and head. The path of the disease down the larynx and ^vindpipe is easily traced, and the ulcers follow one liae — that of the absorbents. In aggravated cases, this can generally be traced on to the lungs. It produces iuflam- mation in these organs, characterised in some cases by congestion ; but in other cases, the congestion has gone on to hepatisation, in which the cellular textui-e of the lungs is obliterated. Most frequently, when the lungs are affected at all, tubercles are found — miliary tubercles — minute granulated spots on the surface, or in the substance of the lungs, and not accompanied by much inflammation. In a few cases there are larger tubercles, which soften and burst, and terminate in cavities of varying size ; they are then called vomicge. In some cases, and showing that glanders is not essentially or neces- sarily a disease of the lungs, there is no morbid afiection whatever in those organs. The history thus given of the symptoms of glanders Avill clearly point out its nature. It is an affection of the membrane of the nose. Some say, and at theii' head is Professor Dupuy, that it is the production of tubercles, or minute tumoui's in the upper cells of the nose, which may long exist undetected, except by a scarcely perceptible running from the nostril, caused by the irritation which they occasion. These tubercles gradually become more numerous ; they cluster together, suppurate and break, and small ulcerations are formed. The ulcers discharge a poisonous matter, which is absorbed and taken up by the neighboui-iug glands, and this, with greater or less rapidity, vitiates the constitution of the animal, and is capable of communicating the disease to others. Some content themselves with saying that it is an inflammation of the membrane of the nose, which may assume an acute or chronic form, or in a very short time, or ex- ceedingly slowly, run on to ulceration. It is inflammation, whether specific or common, of the lining membrane of the nose — possibly for months, and even for years, confined to that membrane, and even to a portion of it — the health and the usefulness of the animal not being in the slightest degree impaired. Then, from some unknown cause, not a new but an intenser action is set up, the inflamma- tion more speedily runs its coui'se and the membrane becomes ulcerated. The inflammation spreads on either side down the septum, and the idcera- tion at length assumes that peculiar chancrous form which characteriseh V:08 GLANDERS. mti animation of the absorbents. Even then, when the discharge becomes glney, and sometimes after chancres have appeared, the horse is apparently well. There are hundreds of glandered horses about the country vAih not a sick one among them. For months or years this disease may do no injury to the general health. The inflammation is purely local, and is only recognised by the invariable accompaniment of inflammation and in- creased secretion. Its neighbours fall around, but the disease afiects not the animal whence it came. At length a constitutional inflammation ap- pears ; farcy is established in its most horrible form, and death speedily closes the scene. What, then, is the cause of this insidious dreadful disease ? Although we may be in a manner powerless as to the removal of the malady, yet if we can trace its cause and manner of action, we may at least be able to do something in the way of prevention. Much has been accomphshed in this way. Glanders does not commit one-tenth part of the ravages which it did thirty or forty years ago, and, generally speaking, it is now only found as a frequent and prevalent disease where neglect, and filth, and want of ventilation exist. Glanders may be either bred in the horse, or communicated by con- tagion. What we have farther to remark on this malady will be arranged under these two heads. Improper stable management we beheve to be a far more frequent cause of glanders than contagion. The air which is necessary to respiration is changed and empoisoned in its passage through the lungs, and a fresh supply is necessary for the support of life. That supply may be sufficient barely to support life, but not to prevent the vitiated air from again and again passing to the lungs, and producing irritation and disease. The membrane of the nose, possessed of extreme sensibility for the purposes of smell, is easily irritated by this poison, and close and ill-ventilated stables oftenest witness the ravages of glanders. Professor Coleman relates a case which proves to demonstration the rapid and fatal agency of this cause. ' In the expedition to Quiberon, the horses had not been long on board the transports before it became necessary to shut down the hatchways for a few hours ; the consequence of this was, that some of them were suf- focated, and that all the rest were disembarked either glandered or farcied.' In a close stable, the air is not only poisoned by being repeatedly breathed, but there are other and more powerful sources of mischief. The dung and the urine are suffered to remain fermenting, and giving out injurious gases. In many dark and ill-managed stables, a portion of the dung may be swept away, but the urine lies for days at the bottom of the bed, the disgusting and putrefjong nature of which is ill-concealed by a little fresh straw which the lazy horsekeeper scatters over the top. The stables of the gentleman are generally kept hot enough, and far too hot, although, in many of them, a more rational mode of treatment is beginning to be adopted ; but they are lofty and roomy, and the horses are not too much crowded together, and a most scrupulous regard is paid to cleanliness. Glanders seldom prevails there. The stables of the farmer are ill-managed and filthy enough, and the ordure and urine sometimes remain from week to week, until the horse lies on a perfect dunghill. Glanders seldom prevails there ; for the same carelessness which permits the filth to accumulate leaves many a cranny for the \^'ind to enter and sweep away the deleterious fumes from this badly-roofed and unceiled place. The stables of the horse-dealer are hot enough ; but a principle of strict cieanliness is enforced, for there must be nothing t^ offend the eye or the GLAJS'DEKS. 209 nose of tile customer, and tliere glanders is seldom found ; but if the stables of many of our post and omnibus horses, and of those employed on oux canals, are examined, almost too low for a tall horse to stand upright m them, — too dark for the accumulation of filth to be perceived, — too far from the eye of the master, — ill-drained and ill-paved, — and governed by a false principle of economy, which begnidges the labour of the man, and the cleanliness and comfort of the animal ; these -will be the very hotbeds of the disease, and in many of these establishments it is an almost constant resident. Glanders may be produced by anything that injui^es, or for a length of time acts upon and weakens, the vital energy of this membrane. It has been known to follow a fracture of the bones of the nose. It has been the consequence of violent catarrh, and particulai'ly the long-continued dis- charge from the nosti'ils, of which we have spoken. It has been produced by the injection of stimulating and acrid substances up the nostril. Everything that weakens the constitution generally will lead to glanders. It is not only from bad stable management, but from the hardships wliich they endure, and the exhausted state of their constitution, that post and machine horses are so subject to glanders ; and there is scarcely an in- flammatory disease to which the horse is subject that is not occasionally wound up and terminated by the appearance of glanders. Among the causes of glanders is want of regular exercise. The con- nection, although not evident at first glance, is too certain. When a horse has been worked with peculiar severity, and is become out of spirits, and falls away in flesh, and refuses to eat, a Kttle rest and a few mashes would make all right again ; but the gTOom plies him with cordials, and adds fuel to fire, and aggravates the state of fever that has commenced. What is the necessary consequence of this ? The weakest goes to the wall, and either the lungs or the feet, or this membrane — that of the nose — the weakest of all, exposed day after day to the stimulating, debilitating influences that have been described, becomes the principal seat of inflam- mation that terminates in glanders. It is in this way that glanders has so frequently been knovm to follow a hard day's chase. The seeds of the disease may have previously existed, but its progress vsdll be hastened by the general and febrile action excited — the absurd measures which are adopted not being calculated to subdue the fever, but to increase the stimulus. Every exciting cause of disease exerts its chief and its worst influence on this membrane. At the close of a severe campaign the horses are more than decimated by this pest. At the tennination of the Peninstilar war the ravages of this disease were dreadful. Every disease will predispose the membrane of the nose to take on the inflammation of glanders, and with many, as strangles, catarrh, bronchitis, and pneumonia, there is a continuity of membrane, an association of fonction, and a thousand sympathies. There is not a disease which may not lay the foundation for glanders. Weeks, and months, and years may intervene between the predisposing cause and the actual evil ; but at leng-th the whole frame niay become excited or debilitated in many a way, and then this debilitated portion of it is the first to yield to the attack. Atmospheric influence has somewhat to do with the prevalence of glanders. It is not so frequent in the summer as in the -onnter, partly attributable, perhaps, to the different state of the stable in the summer months, neither the air so close or so foul, nor the alternations of temperature so great. There are some remaikable cases of the connection of moistiu'e, or moist exhalations, that desei-ve record. When new stabling was built for the p 210 GLA:!fDERS. troops at Hythe, and inhabited before the walls were perfectly dry, iniuiy of the horses that had been removed from an open, dry, and healthy situation, became affected with glanders ; but, some time having passed over, the horses in these stables were as healthy as the others, and glan- ders ceased to appear. An innkeeper at Wakefield built some extensive stabling for his horses, and inhabiting them too soon, lost a great pro- portion of his cattle from glanders. There are not now more healthy stables in the place. The immense range of stables under the Adelphi, m the Strand, where light never enters, and the supply of fresh air is not too abundant, were for a long time notoriously unhealthy, and many valuable horses we^e destroyed by glanders ; but now they are filled with the finest waggon and di'ay-horses that the metropolis or the country con- tains, and they are fully as healthy as in the majority of stables above- ground. There is one more cause to be sHghtly mentioned — hereditary predispo- Bition. This has not been sufliciently estimated, with regard to the ques- tion now under consideration, as well as with respect to everything connected with the breeding of the horse. There is scarcely a disease that does not run in the stock. There is that in the structure of various parts, or their disposition to be afiected by certain influences, which per- petuates in the offspring the diseases of the sire ; and thus contraction, ophthaLmia, roaring, are decidedly hereditary, and so is glanders. M. Dupuy relates some decisive cases. A mare, on dissection, exhibited every appearance of glanders ; her filly, who resembled her in form and in her vicious propensities, died glandered at six years old. A second and a third mare and their foals presented the same fatal proof that glanders Ls hereditary. Glanders is highly contagious. The farmer cannot be to deeply im- pressed with the certainty of this. Considering the degree to which this disease, even at the present day, often prevails, the legislature would be justified in interfering by some severe enactments, as it has done in the case of the small-pox in the human subject. The early and marked symptom of glanders is a discharge from the nostrils of a peculiar character ; and if that, even before it becomes puru- lent, is rubbed on a wound, or on a mucous surface, as the nostrils, it will produce a similar disease. If the division between two horses were suffi- ciently high to prevent all smelling and snorting at each other and contact of every kind, and they drank not out of the same pail, a sound horso might Hve for years, uninfected, by the side of a glandered one. The matter of glanders has been mixed up into a ball, and given to a healthy horse, without efiect. Some horses have eaten the hay left by those that were glandered, and no bad consequence has followed ; but others have been speedily infected. The glanderous matter must come in contact with a wound, or fall on some membrane, thin and delicate like that of the nose, and through which it may be absorbed. It is easy, then, accustomed as horses are to be crowded together, and to recognise each other by the smeU — eating out of the same manger, and drinking from the same pail — to imagine that the disease may be very readily communicated. One horse has passed another when he was in the act of snorting, and has become glandered. Some fillies have received the contagion from the matter blown by the wind across a lane, when a glandered horse, in the opposite field, has claimed acquaintance by neighing or snorting. It is almost im- possible for a glandered horse to remain long in a stable with others without irreparable mischief. K some persons underrate the danger, it is because the disease may remain unrecognised in the infected horse for some months, or even years. GLANDERS. 211 and therefore, when it appears, it is attributed to other causes or to after inoculation. No glandered horse should be employed on any farm, nor should a glandered horse be permitted to work on any road, or even to pasture on any field. Mischief may be so easily and extensively effected, that the public interest demands that every infected animal should be summarily destroyed, or given over for experiment to a veterinary surgeon. or recognised veterinary establishment. There are a few instances of the spontaneous cure of chronic glanders. The discharge has existed for a considerable time. At length it has gradually diminished, and has ceased ; and this has occurred under every kind of treatment, and without any medical treatment : but in the majority of these supposed cases, the matter was only pent up for a while, and then, bursting from its confinement, it flowed again in double quantity : or, if glanders has not reappeared, the horse, in eighteen or twenty-four months, has become farcied, or consumptive, and died. These supposed cures are few and far between, and are to be regarded with much suspicion. As for medicine, there is scarcely a drug to which a fair trial has not been given, and many of them have had a temporary reputation ; but they have passed away, one after the other, and are no longer heard of. The blue vitriol and the Spanish-fly have held out longest ; and in a few casesj either nature or these medicines have done wonders, but in the majority of instances they have palpably failed. The diniodide of copper has lately acquired some reputation. It has been of gi'eat service in cases of farcy, but is not to be depended upon in glanders. "Wliere the life of a valuable animal is at stake, and the owner adopts every precaution to prevent infection, he may subject the horse to medical treatment ; but every humane man will indignantly object to the slitting of the nostril, and the scraping of the cartilage, and searing of the gland, and firing of the frontal and nasal bones, and to those injections of mustard and capsicum, corrosive sublimate and vitriol, by which the horse has been tortured, and the practitioner disgraced. At the veterinary school, and by veterinary surgeons, it will be most desirable that every experiment should be tried to discover a remedy for this pest ; but, in ordinary instances, he is not faithful to his own interest or that of his neighbours who does not remove the possibility of danger in the most summary way. If, however, remedial measures are resorted to, a pure atmosphere is that which should first be tried. Glanders is the peculiar disease of the stabled horse, and the preparation for, or the foundation of, a cure must consist in the perfect removal of every exciting cause of the malady. The horse must breathe a cool and pure atmosphere, and he must be turned out, or placed in a situation equivalent to it. A salt marsh is, above all others, the situation for this experiment ; but there is much caution required. No sound horse must be in the same pasture, or a neighbouring one. The palings or the gates may receive a portion of the matter, which may harden upon them, and, many a month afterwards, be a source of mischief — nay, the virus may cling about the very herbage and empoison it. Cattle and sheep should not be tmsted with a glandered horse, for the experiments are not sufficiently numerous or decided as to the exemption of these animals from the contagion of glanders. Sujiposing that glanders has made its appearance in the stables of a farmer, is there any danger after he has removed or destroyed the infected horse ? — Certainly there is, but not to the extent that is commonly supposed. There is no necessity for pulling down the racks and man- gers, or even the stable itself, as some have done. The poison resides not in the breath of the animal, but in the nasal discharge, and that can p2 212 FARCY. only rcAoh coi'tam parts of the stable. If the mangers, and racks, and bales, and partitions, are first well scraped, and scoured -with soap and water, and then thorouglilj washed with a solution of the chloride of lime (one pint of the chloride to a pailful of water), and the walls are lime- washed, and the head-gear burned, and the clothing baked or washed, and the pails newly painted, and the iron- work exposed to a red heat, all danger will cease. Little that is satisfactory can be said of the 'prevention of glanders. The first and most efiectual mode of prevention will be to keep the stables cool and well ventilated, for the hot and poisoned air of low and confined stables is one of the most prevalent causes of glanders. N'ext to ventilation comes good and efficient drainage. The urine should never be allowed to lie on the surface, but have ready means of escape through ample aud well-arranged drains ; for the foul air from the fermenting litter, and urine, and dung, must not only be highly injurious to health generally, but irritate and predispose to inflammation that deli- cate membrane which is the primary seat of the disease. If to this be added regular exercise, and occasional green meat dui^ing the summer, and carrots in the winter, we shall have stated all that can be done in the way of prevention. Glanders in the human being. — It cannot be too often repeated, that a glandered horse can rarely remain among sound ones without serious mischief ensuing ; and, worse than all, the man who attends on that horse is in danger. The cases are now becoming far too numerous in which the groom or the veterinary surgeon attending on glandered horses becomes infected, and in the majority of cases dies. It is, however, somewhat more manageable in the human being than in the quadruped. Some cases of recovery from farcy and glanders stand on record with regard to the human being, but they are few and far between. FARCY. Farcy is intimately connected with glanders ; they will run into each other, or their symptoms will mingle together, and before either arrives at its fatal termination the other will generally appear. An animal inoculated with the matter of farcy will often be afflicted with glanders, while the matter of glanders will frequently produce farcy. They are different types of the same disease. There is, however, a very material difference in their symptoms and progress, and this most important one of all, that while glanders is incurable, farcy, in its early stage and mild form, may be successfally treated. While the capillary vessels of the arteries are everywhere employed in building up the frame, the absorbents are no less diligently at work ia selecting and carrying away every useless or worn-out portion or part of it. There is no surface — there is no assig-nable spot on which thou- sands of these little mouths do not open. In the discharge of their duty, they not only remove that which is become useless, and often that which is healthy, but that which is poisonous and destructive. They open upon the surface of every glanderous chancre. They absorb a portion of the virus which is secreted by the ulcer, and as it passes along these little tubes, they suSer from its acrimonious quahty ; hence the corded veins, ae they are called by the farrier, or, more properly, the thickened and in- flamed absorbents following the course of the veins. At certain distances in the course of the absorbents are loose duplica- tures of the lining membrane, forming valves, which are pressed against the side of the vessel and permit the fluid to pass in a direction towards the chest, but bel]y out and impede or arrest its progress from the chest. FARCY. 218 The virus at these places, and the additional inflammation there excited, is to a greater or less degree evident to the eye and to the feeling. They are usually first observed about the Hps, the nose, the neck, the axillary spaces of the chest, and the thighs. They are very hard — even of a scirrhous hardness, more or less tender, and with perceptible heat about them. The poisonous matter being thus confined and pressing on the part, sup- pui'ation and ulceration ensue. The ulcers have the same characters as the glanderous ones on the membrane of the nose. They are rounded, with an elevated edge and a pale surface. They are true chancres, and they discharge a virus as infectious and as dangerous as the matter of glanders. While they remain in their hard prominent state, they are called huttons or farcy hids ; and they are connected together by the in- flamed and corded absorbents. In some cases the horse >vill droop for many a day before the appear- ance of the corded veins or buds — ^his appetite will be impaired — his coat will stare — ^he will lose flesh. The poison is evidently at work, but has not gained sufficient power to cause the absorbents to enlarge. In a few cases these buds do not ulcerate, but become hard and difficult to disperse. The progress of the disease is then suspended, and possibly for some months tlie horse will appear to be restored to health ; but he bears the seeds of the malady about him, and in due time the farcy assumes its virulent form, and hurries him off". These buds have sometimes been confounded with the little tumours or lumps termed surfeit. They are generally higher than these tumours, and not so broad. They have a more knotty chai-acter, and are principally found on the inside of the limbs, instead of the outside. 'Fe\\' things are more unhke, or more perplexing, than the different forms which farcy assumes at different times. One of the legs, and par- ticularly one of the hinder legs, will suddenly swell to an enormous size. At night the horse will ap})ear to be perfectly well, and in the morning one leg will be three times the size of the other, with considerable fever and scarcely the power of moving the limb. At other times the head will be subject to this enlargement, the muzzla particularly will swell, and an offensive discharge will proceed from the nose. Sometimes the horse will gradually lose flesh and strength; he will be hide-bound ; mangy eruptions will appear in different parts ; the legs will swell ; cracks will be seen at the heels, and an inexperienced person may conceive it to be a mere want of condition, combined with ^ease. By degrees the affection becomes general. The vims has reached the termination of the absorbents, and mingles with the general circulating fluid, and is conveyed with the blood to every part of the frame. There are no longer any valves to impede its progress, and consequently no knots or huds, but the myiiads of capillary absorbents that penetrate every part become inflamed, and thickened, and enlarged, and cease to discharge their function. Hence arises enlargement of the substance of various parts, swelhngs of the legs, and chest, and head — sudden, painiul, enormous, and distinguished by a heat and tenderness, which do not accompany other enlargements. It is a question considered somewhat difficult to answer, whether farcy can exist without previous glanders. Certainly it can ; there are nume- rous instances of cases of farcy running their course pui'ely as such, and ultimately arriving at a complete recovery, without a single sjTnptom of glanders intervening. Farcy is a curable form of the disease, glanders the incurable ; and this most important distinction between them at once 2J.i FARCY. proves, that although they may be, and most probably are, t^^pes of one and the same disease, they are not identical with each other. There is the long-continued insidious progress of glanders — the time which may elapse, and often does, before the o^\Tier is aware or the veterinary surgeon sure of it — the possibiHty that minute ulceration may have for a long while existed in some of the recesses of the nose — or that the shght dis- charge, undreaded and unrecognised, yet vitiated, poisoned, and capable of communicating the disease, may have been long travelling through the frame, and affecting the absorbents, and preparing for the sudden display of farcy. One thing, however, is undeniable, that farcy does not long and ex- tensively prevail without being accompanied by glanders, and that it never destroys the animal without plainly associating itself with glanders. They are, in fact, types of the same disease. Glanders is inflammation of the membrane of the nose, producing an altered and poisonous secretion, and when sufficient of this vitiated secre- tion has been taken up to produce inflammation and ulceration of the absorbents, farcy is established. Its progress is occasionally very ca- pricious, continuing in a few cases for months and years, the vigour of the horse remaining unimpaired ; and at other times, running on to its fatal termination with a rapidity perfectly astonishing. Farcy has been confounded with other diseases ; but he must be careless or ignorant who mistook sprain for it. The inflammation is too circum- scribed and too plainly connected with the joint or the tendon. It may be readily distinguished from grease or swelled legs. In grease there is usually some crack or scurfiness, a peculiar tenseness and redness and glossiness of the skin, some ichorous discharge, and a singular spas- modic catching up of the leg. In farcy the engorgement is even more sudden than that of grease. The horse is well to-day, and to-morrow he is gorged from the fetlock to the haunch, and although there is not the same redness or glossiness, there is great tenderness, a burning heat in the limb, and much general fever. It is simultaneous inflammation of all the absorbents of the limb. Surfeit can scarcely be confounded with farcy or glanders. It is a pustular eruption — surfeit bumps, as they are called, and terminating in desquamation, not in ulceration, although numerous, yet iiTegularly placed, and never following the course of the absorbents, but scattered over the skn. Local dropsy of the cellular membrane, and particularly that enlargement beneath the thorax which has the strange appellation of water-farcy, have none of the characters of real farcy. It is general debihty to a greater or less degree, and not inflammation of the absorbents. If properly treated, it soon disappears, except that, occasionally, at the close of some serious disease, it indicates a breaking up of the constitution. Farcy, like glanders, springs from contagion and from bad stable manage- ment. It is produced by all the causes which give rise to glanders, with this difierence, that it is more frequently generated, and sometimes strangely prevalent in particular districts. It will attack, at the same time, several horses in the same ill-conducted stable, and others in the neighourhood who have been exposed to the same predisposing causes. Some have denied that it is a contagious disease. They must have had Httle experi- ence. It is true that the matter of farcy must come in contact with a wound or sore, in order to communicate the disease ; but accustomed as horses are to nibble and play with each other, and sore as the comers of the mouth are frequently rendered by the bit, it is easy to imagine that this may be easily efi'ected ; and experience tells us, that a horse having farcy ulcers caimot be suffered to remain with others without extreme risk. THE LIPS. 216 Tlie treatment of farcy differs witli tlie form that it assumes. As a general rule, and especially when the buttons or buds are begiuning to appear, a mild dose of physic should first be administered. The buds should then be carefally examined, and if any of them have broken, the budding-iron, at a dull red heat, should be apphed. If pus should be felt in them, show-ing that they are disposed to break, they should be pene- trated with the iron. These wounds should be daily inspected, and if, when the slough of the cautery comes off, they look pale, and foul, and spongy, and discharge a thin matter, they should be frequently washed witli a strong lotion of corrosive sublimate, dissolved in rectified spirit. When the wounds begin to look red, and the bottom of them is even and firm, and they discharge a thick white or yellow matter, the Friar's balsam will usually dispose them to heal. As, however, the constitution is now tainted, local applications will not be sufiicient, and the disease must be attacked by internal medicine as soon as the physic has ceased to operate. Cotrosive sublimate used to be a favourite medicine, combined with tonics, and repeated morning and night until the ulcers disappeared, unless the mouth became sore or the horse was violently purged, when the sulphate of copper was substituted for the corrosive sublimate. During this treat- ment the animal was placed, if possible, in a large box, with a free circu- lation of air ; and green meat or carrots, and particularly the latter, were given, with a full allowance of corn. If he could be turned out in the day, it was deemed highly advantageous. It is related by JSIr. Blaine, that a horse, so reduced as not to be able to stand, was drawn into a field of tares, and suffered to take his chance. The consequence was that, when he had eaten all within his reach, he contrived to move about and search for more, and eventually recovered. Many horses recover under the use ef the sublimate, but the great majority of them die. ;Mr. Vines introduced a more effective medicine — cantharides, in combi- nation likewise with the vegetable bitters — as a cure for farcy and glanders. It cannot be denied, that many animals labouring under the former, and a few under the latter, were to all appearance radically cui-ed. The medicine was suspended for awhile if aflection of the kidneys super- vened. A still more effectual medicine has been introduced by Professor Morton, namely, the diniodide of copper, and it has been found of essential service in farcy and in diseases simulating glanders. He says that its action is that of a stimulant to the absorbent vessels, and a tonic. The gentian root is usually combined with it. Cantharides, in small quantities, may be advantageously added. An indication of its influence is a soreness of the diseased parts arising from the absorbent vessels being roused into in- creased action : the agent should then be for a time withheld. Water-Farcy, confounded by name with the common farcy, and by which much confusion has been caused, and a great deal of mischief done, is a dropsical affection of the skin, either of the chest or of the limbs, and belongs to another part of the subject. THE LIPS. The lips of the horse are far more important organs than many suppose. They are the hands of the animal ; and if any one will take the trouble to observe the manner in which he gathers up his corn with them, and col- lects together the grass before he divides it ^vith his nippers, he will be satisfied that the horse would be no more able to convey the food to his mouth without them, than the human being could without his hands. Tliis has even been put to the test of experiment. The nerves which ■216 THE LIPS. supply tlie lips were dirided in a poor ass, to illustrate some point of physio- logv. The sensibility of tlie lips was lost, and he knew not when he touched his food with them. The motion of the lips was lost, and he coidd not get the oats between his teeth, although the manger was full of them: at length, driven by hunger, he contrived to lick up a few of them with his tongue ; but when they were on his tongue, the greater part of them were rubbed off before he could get them into his mouth. It is on account of this use of the lips, that they may be brought into contact with the food without inconvenience or injury to other parts of the face, that the heads of most quadrupeds are so lengthened. Several muscles go to the Hps from different parts of the jaw and face. Some of them are shown in the cut, p. 199. The orbicularis or circular muscle, p, employed in pushing out the lips and closing them, and enabling the horse to seize and hold his food, is particularly evident ; and in the explanation of the cut, the action of other muscles, i, Zr, m, and o, was described. The nerves likewise, ?/, taking their course along the cheek, and pinncipally supplying the lips -n-ith the power of motion, and those, z, proceeding from the foramen, or hole in the upper jaw, deserve attention. The lips are composed of a muscular substance for the sake of strength, and a multitude of small glands, which secrete a fluid that covers the in- side of the lips and the gums, in order to prevent friction, and likewise furnish a portion of the moisture so necessary for the proper chewing of the food. The skin covering the lips is exceedingly thin, in order that their peculiar sensibility may be preserved, and for the same purpose they are scantily covered with hair, and that hair is fine and short. Long bail's or feelers, termed the beard, are superadded with the same intention. The horse is guided and governed principally by the mouth, and therefore the Hps are endowed Avith very great sensibility, so that the animal feels the slightest motion of the hand of the rider or driver, and seems to anticipate his very thoughts. The fineness or goodness of tlie moidh con- sists in its exquisite feeling, and that depends on the thinness of this membrane. The Kps of the horse should be thin, if the beauty of the head is regarded; yet. although thin, they should evidently possess power, and be strongly and regularly closed. A firm, compressed mouth gives a favoui-able and no deceptive idea of the muscular power of the animal. Lips apart from each other and hanging down, indicate weakness or old age, or dulness and sluggishness. The depth of the mouth, or the distance from the fore-part to the angle of the lips, should be considerable. A short protuberant mouth would be a bad finish to the tapering face of the blood-horse. More room is like- wise given for the opening of the nostril, which has been sho^vn to be an important consideration. The bridle will not be carried well, and the horse will hang heavy on hand, if there is not considerable depth of mouth. The comers or angles of the lips are fr-equently made sore or wounded by the smallness, or shortness, or peculiar twisting of the snaffle, and the unnecessary and cruel tightness of the bearing rein. This rein was in- troduced as giving the horse a grander appearance in harness, and placing the head in that position in which the bit most effectually presses upon the jaw. It is an useful adjunct to di-iving safely, for, deprived of this con- trol, many horses would hang their heads low, and be disposed every moment to stumble, and would defy all pulling, if they tried to run away. There is, and can be no necessity, however, for using a bearing-rein so tight as to cramp the muscles of the head, or to injure and excoriate the angles of the lips. The following is the opinion of Nimrod, and to a more competent judge BOXES OF THE MOUTH. 217 we cvnild not appeal : — ' As to tlie universal disuse of tlie bearing-rein witli English horses, it can never ial-o place. The charge against it of cruelty at once falls to the ground, because to make a team -work together in fast -work, every horse's head must be as much restrained by the coupling-reia as it would be and is by the bearing-rein. Its excellence consists in keeping horses' mouths fresh — in enabling a coachman to in- dulge a horse with liberty of rein, Ts4thout letting him be all abroad, ■which he "would be ■with his head quite loose, and of additional safety to the coach-horse, as proved by the fact of either that or the crupper always giving "way "when he falls do"wn. There are, however, teams in "which it may be dispensed "with, and the horses have an advantage in their -working •against hills. As to the comparison of the road coach-horses on the Con- tment and our o"wn, let any one examine the knees of the French diligence and post-horses, which are allowed perfect hberty of head, and he wUl be con"rinced that the use of the bearing-rein does not keep them on their legs.' The teams in which it may be dispensed with are those in which the horses naturally carry then" heads well ; that is, much in the same position in which the bearing-rein would place them. The mouth is injured much oftener than the careless o"wner suspects by the pressure of a sharp bit. Not only are the bars wounded and deeply ulcerated, but the lower jaw, between the tush and the grinders, is some- times worn even to the bone, and the bone itself affected, and portions of it exfoHate away. It may be necessary to have a shar]3 bit for the headstrong and obstinate beast ; yet if that bit is severely and unjustifiably called into exercise, the animal may rear, and endanger himself and his rider. There can, however, be no occasion for a thousandth pai-t of the torment which the trappings of the mouth often inflict on a willing and docile servant ajid which either render the mouth hard, and destroy all the pleasure of riding, or cause the horse to become fi'etfal or vicious. Small ulcers are sometimes found in various parts of the mouth, said to foe produced by rusty bits, but oftener arising from contusions inflicted by the bit, or from inflammation of the mouth. If the curb-bit is in fault, a snaffle or Pelham-bit should be used. K there is inflammation of the mouth, a little cooling medicine may be administered ; and to the ulcers themselves, tincture of myi'rh, diluted with water, or alum dissolved in water, may be applied "with advantage, THE BONES OP THE MOUTH. The bones constituting and gi-ring form to the mouth are the superior maxillary or upper jaw (&, p. 140, and ?, p. 145), containing the uppei gi'inders and tushes ; the anterior maxillary, or lower part of the uppei jaw ( /', p. 140, H, p. 145), containing the upper-nippers or cutting-teeth ; the palatine bone (c, p. 197) and the posterior maxillary or under jaw (a, p. 140), containing all the under teeth. The superior maxillary is, with the exception of the lower jaw, the largest bone in the face. It unites above with the lachrymal bone, and more on the side, "with the malar or cheek bone, and a portion of it, con- tinued upward, and underneath, enters into the orbit. Above, and on the front of the face, it unites "with the bones of the nose, and below, "with the inferior maxillary. That which most deserves notice in it externally is the ridge or spine, continued from the base of the zygomatic arch, and across the malar bone. It and the surface beneath serve to give attach- ment to the masseter muscle, concerned, almost as much as the temporal one, in the act of chewing. On the anterior surface is a foramen or hole, through which a branch of the fifth pair of nerves proceeds to give sensi- bihty to the lower part of the face. As it ap^Droaches tlie teeth, this bone 218 THE TALATE. separates into two plates, and these are divided by long partitions, which contain and firmly hold the upper grinders. The lower plate then projects inwards, and forms the pinncipal portion of the roof of the mouth, and the floor of the cavity of the nose. The corresponding bone on the other side meets its fellow in the centre of the palate. The upper jaw-bone contains in its large cavities besides those for the teeth, and these open into and enlarge the cavity of the nose. They are connected with the voice, but not with the smell, for the expansion of the olfactory or smelling nerve has never been traced beyond the bones and membranes of the proper caAaty of the nose. The maxillary sinuses are generally filled with matter in bad cases of glanders. Below these are the anterior maxillary bones, containing the upper cutting teeth, with the tushes belonging both to the upper and anterior bones. These are the bones to which the upper lip is attached. The superior and anterior maxillary bones ai'e separated in animals with long faces, like the horse, that, by overlapping each other, strength might be gained. The palatine bone forms but a very small portion of the palate. It surrounds the edge of the communication between the cavity of the nose and the back parts of the mouth. THE PALATE. Adhering to a portion of the three bones just described, and consti- tuting the lining of the roof of the mouth, is the palate, composed of an elastic and dense substance divided into sevei'al ridges called Bars. The followinof cut crives a view of them. It will also point out the bleeding place, if it should occasionally be deemed advisable to abstract blood from the mouth ; or if the horse should be attacked Avith megrims on a journey, and the driver, having no lancet, should be compelled to make use of his knife, the incision should be made between the central and second nippers on either side, about an inch within the mouth, and cutting through the second bar. A stream of blood will be thus obtained, which will usually cease to flow when two or three quarts have escaped, or may generally be arrested by the application of a sponge filled with cold water. This, hoAvever, is a make-shift sort of bleed- ing that may be allowable on a journey, and possibly in some cases of lampas, but which is decidedly objectionable as the usual mode of abstracting blood. The quantity withdraAvn cannot be measured, the degree of inflamma- tion cannot be ascertained by the manner in which it coagulates, and there may be difii- culty to the operator, and annoyance and pain to the horse, in stopping the bleeding. This cut likewise depicts the appearance of the roof of the mouth if the bars were dis- sected off", and of the numerous vessels, arterial and venous, which ramify over it. At the back of the palate, and attached to the crescent-shaped border of the palatine bone, is a dense membranous curtain. Its superior and back surface is a continuation of the lining membrane of the nose, and its anterior LAMPA3. 21.<) ur iuierior one that of the palate. It is called the velum 'palati, or veil of the palate. It extends as far back as the larjTix, and lies upon the dorsum of the epiglottis, and is a perfect veil or curtain interposed between the cavities of the nose and mouth, cutting off all communication between them. Tied by its attachment to the palatine bone, it will open but a Httle way, and that only in one direction. It will permit a pellet of food to pass into the oesophagus ; but it will close when any pressure is made upon it from behind. Two singular facts necessarily follow from this; the horse breathes through the nostrils alone, and these are capacious and easily expansible to a degree seen in no other animal, and fully commensurate to the wants of the animal. It is also evident that, in the act of vomiting, the contents of the stomach must be returned through the nostril, and not tlirough the m«uth. On this account partly it is that the horse can Avith great difiiculty be excited to vomit. There is a structure at the entrance to the stomach which, ex- cept under very peculiar circumstances, prevents its return to the throat, and consequently to the mouth. LAMPAS. The bars occasionally swell, and rise to a level with, and even beyond the edge of, the teeth. They are very sore, and the horse feeds badly on account of the pain he suffers from the pressure of the food on them. This is called the Lampas. It may arise from inflammation of the gums, propagated to the bars, when the horse is shedding his teeth — and young horses are more subject to it than others — or from some shght febiile tendency in the constitution generally, as when a young horse has lately been taken up from grass, and has been over-fed, or not sufficiently ex- ercised. At times it appears in aged horses, the process of growth in the teeth of the horse continuing during the whole Hfe of the animal. In the majority of cases the swelling will soon subside without medical treatment ; or a few mashes, and gentle alteratives, will reUeve the animal. A few slight incisions across the bars with a lancet or penknife will relieve the inflammation, and cause the swelling to subside ; indeed, this scarification of the bars in lampas will seldom do harm, although it is far from being so necessary as is supposed. The bratal custom of the farrier, who sears and bums down tho bars with a red-hot iron, is most objectionable. It is torturing the horse to no purpose, and calculated to do serious injury to the parts. It may be pru- dent in case of lampas to examine the giinders, and more particularly the tushes, in order to ascertain whether either of them is making its way through the gum. If it is so, two incisions across each other should be made, on the tooth, and the horse will experience immediate relief. THE LOWER JAW. The posterior or lower jaw may be considered as forming the floor of the mouth. The body or lower part of it contains the under cutting teeth and the tushes, and at the sides are two flat pieces of bone containing the grinders. On the inside is a foramen or hole through which blood- vessels and nerves enter to supply the teeth, and some of which escape again at another orifice on the outside, and near the nippers. The branches are broader and thinner, rounded at the angle of the jaw, and terminating in two processes. One, the coracoid, from its sharpness or supposed re- semblance to a beak, passes under the zygomatic arch (see p. liO) ; and the temporal muscle, arising from the whole surface of the parietal bone, is inserted into it, and wrapped round it ; and by its action, principally, the iaw is moved, and the food is ground. The other, the condyloid, or ■220 THE LOWER JAW. rounded process, is received into the glenoid (shallow) cavity of ihe temporal bone, at the base of the zygomatic arch, and forms the joint on which the lower jaw moves. This joint is easily seen in the cut at p. 140 ; and being placed so near to the insertion of the muscle, or the centre of motion, the temporal muscle must act "vvith very considerable mechanical disadvantage, and, consequently, must possess immense power. The joint is admirably contrived for the purpose which the animal re- quires. It TV-ill admit freely and perfectly of the simple motion of a hinge, and that is the action of the jaw in nipping the herbage and seizing the corn. But the grass, and more particularly the com, must be crushed and 'bruised before it is fit for digestion. Smiple champing, which is the motion of the human lower jaw, and that of most beasts of prey, would very imperfectly break dowTi the corn. It must be put into a mill ; it must be actually ground. It is put into the mill, and as perfect a one as imagination can conceive. The following cuts represent the glenoid cavity, in a carnivorous or flesh-eating, and herbivorous or grass-eating, animal, viz. the tiger and the horse ; the one I'equiring a simple hinge-like motion of the lower jaw to tear and crush the food ; the other, a lateral or grinding motion to bring it into a pulpy form. We first examine this cavity in the tiger repre- sented at B. At the root of the zygomatic process D, is a hollow with a ridge along the greater part of the upper and inner side of it, standing to a ^considerable height, and curling over the ca%-ity. At the lower and op- posite edge of the cavity, but on the outside, is a similar ridge, E, likewise rising abruptly and curling over. At C is another and more perfect view of this cavity in a different direction. The head of the lower jaw is re- •ceived into this hollow, and presses against these ridges, and is partially surrounded by them, and forms with them a very strong joint where dis- location is scarcely possible, and the hinge-like or cranching motion is admitted to its fullest extent ; permitting the animal violently to seize his prey, to hold it firmly, and to crush it to pieces ; but from the extent and •curling form of the ridges, forbidding, except to a very slight degree, all lateral and grinding motion, and this because the animal does not want it. As before mentioned, the food of the horse must be ground. Simple bruising and champing would not sufiiciently comminute it for the purposes of digestion. We then observe the different construction of the parts to effect this. A, gives the glenoid cavity of the horse. First, there is the upper ridge assuming a rounded form, F, and therefore called the mastoid process ; sufficiently strong to support the pressure and action of the lower jaw when cropping the food or seizing an enemy, but not encircling the head of that bone, and reaching only a little way along the side of the cavity-, where it terminates, ha\nng its edges rounded off so as to admit, and to be evidently destined for, a circular THE PROCESS OF TEETHING. 221 motion about it. At the otlier and loAver edge of tlie cavity, and on the ontside, G is placed — not a ciirhng ridge as in the tiger, but a mere tubercle : and for what reason ? eyidently to limit this lateral or circular motion — to permit it as far as the necessities of the animal require it, and then to arrest it. How is this done ? Not suddenly or abruptly ; but the tubercle, of which we have already spoken as strengthening this portion of the zygomatic arch, now discharging another office, has a smooth and' gradual ascent to it, up which the lower jaw may chmb to a certain extent, and then, by degrees, be stopped. "We speak not now of the moveable cartilage which is placed in this cavity, and between the bones, to render the motion easier and freer. It is found in this joint in every quadruped ; and it is found wherever motions are rapid and of long continuance. So great is the conformity between the structure of the animal and his destination, that a tolerable student in comparative anatomy, by a mere in- spection of the glenoid cavity, would at once determine whether the animal to which it belonged was carnivorous, and wanted no lateral motion of the jaw ; or omnivorous, Kving occasionally on all kinds of food, and requiring lome degree of grinding motion ; or herbivorous, and needing the constant ase of this admirably- constructed mill. At g, p. 199, is represented the masseter muscle, an exceedingly strcng^ one, constituting the cheek of the horse — arising from the superior maxillary tinder the ridge continued from the zygomatic arch, and inserted into the lower jaw, and particularly round the rough border at the angle of the jaw. This acts with the temporal muscle in closing the jaw, and in giving the direct cutting or champing motion to it. Within the lower jaw, on either side, and occupying the whole of the hollowed portion of them, and opposite to the masseters, are the pterygoid muscles, going fi'om the jaws to bones more in the centre of the channel, likewise closing the mouth, and also, by their alternate action, giving that grinding motion which has been described. The space between the branches of the lower jaw, called the c?Mnnel, is of considerable consequence. It can scarcely be too wide ; for if it is too narrow, the horse will never be able to bend his head freely and gracefully ; he will be always pulling or boring upon the hand, nor can he possibly be well reined in. The jaws contain the teeth, which are the millstones employed in com- minuting the food. The mouth of the horse at five years old contains forty teeth, viz, six nippers or cutting teeth in front, above and below, a tush on each side, and six molars, or grinding teeth, on each side, above and below. They are contained in cavities in the upper and lower jaws, surroiinded by bony partitions, to which they are accurately fitted, and by which they are firmly supported. For a little way above these bony cavities, they are surrounded by a firm substance called the gum, so dense, and adhering so closely to the teeth and the jaws, as not to be separated -without very great difficulty — singularly compact, that it may not be wounded by the hard or sharp particles of the food, and almost devoid of feeling, for the same purpose. Seven or eight months before the foal is bom, the germs or beginnings of the teeth are visible in the cavities of the jaws. The tooth grows, and '-- presses to the surface of the giim, and forces its way through it ; and, at the time of birth, the first and second grinders have appeared, large com- pared with the size of the jaw, and seemingly filling it. In the course of seven or eight days the two central nippers are seen as here represented. 222 THE PROCESS OF TEETHING. They likewise appear to be large, and to fill the front of the mouth ; although they will afterwards be found to be small, compared with the permanent teeth that follow. In the course of the first month the third grinder appears above and below, and, not long after, and generally be- fore six weeks have expired, another incisor above and below will be seen on each side of the two first, which have now considerably grown, but not attained their perfect height. This cut will represent the appear- xnce of the mouth at that time. At two months, the central nippers will have reached their natural level, and between the second and third month the second pair will have overtaken them. They will then begin to wear away a little, and the outer edge, which was at first somewhat raised and sharp, is brought to a level with the inner one, and so the mouth continues until some time between the sixth and ninth month, when another nipper begins to appear on each side of the two first, making six above and below, and completing the colt's mouth ; after which, the only observable difference, until between the second and third year, is in the wear of these teeth. The term nipper is familiar to the horseman and the farrier, and much better expresses the action of these teeth than the word incisor or cutter, which is adojited by anatomists. Whoever has observed a horse in the act of browsing, and the twitch of the head which accompanies the separation of each portion of grass, will perceive that it is nipped or torn rather than cut ofi". These teeth are covered with a polished and exceedingly hard sub- stance, called the enamel. It spreads over that portion of the teeth which appears above the gum, and not only so, but as they are to be so much employed in nipping the grass, and gathering up the animal's food, and in such employment even this hard substance must be gradually worn away, a portion of it, as it passes over the upper surface of the teeth, is bent inward, and sunk into the body of the teeth, and forms a little pit in them. The inside and bottom of this pit being blackened by the food, constitutes the marh of the teeth, by the gTadual disappearance of which, in consequence of the wearing down of the edge, we are enabled, for several years, to judge of the age of the animal. The colt's nipping teeth are rounded in front, somewhat hollow towards the mouth, and present at first a cutting surface, with the outer edge rising in a slanting direction above the inner edge. This, however, soon begins to wear down until both surfaces are level, and the mavTi, which was originally long and narrow, becomes shorter, and wider, and fainter. At six months the four nippers are beginning to wear to a level. The an- nexed cut wiU convey some idea of the appear- ance of the teeth at twelve months. The four middle teeth are almost level, and the comer ones becoming so. The mark in the two middle teeth is wide and faint ; in the two next teeth it is darker, and longer, and narrower ; and in the comer teeth it is the darkest, and longest, and narrowest. The back teeth, or grinders, will not guldens far in ascertaining the age of the animal, for we can- not easily inspect them ; bat there are some interesting particulars connected wiiJi them. The foal is bcrn with two grinders in each jaw, above and below; THE PROCESS OF TEETHING. 223 or they appear wathin tliree or four days after the birth. Before the ex- piration of a month they are succeeded by a third, more backward. The crowns of the grinders are entirely covered by enamel on the top and sides, but attrition soon wears it away from the top, and there remains a com- pound surface of alternate layers of crusta petrosa, enamel and ivory, Avhich are emploj-ed in grinding down the hardest portions of the food. Natui'e has therefore made an additional provision for their strength and endurance. This cut represents a grinder sawed across. It seems to be a most irregular and intricate structure ; but the explanation is not difficult. The tooth is formed and prepared in cavities within the jaw-bones. A delicate membranous bag, containing a jelly-like substance, is found, in the unborn animal, in a little cell within the jaw- bone. It assumes, by degrees, the form of the tooth that is to appear, and then the jelly within the membrane begins to change to bony matter, and a hard and beautiful crystallisation is formed on the membrane -without, and so we have the cutting iooih covered by its enamel. In the formation, however, of each of these grinders of the horse, there are originally five membranous bags in the upper jaw, and four in the lower, filled with jelly. This by degrees gives place to bony matter, which is thrown ou.t by little vessels penetrating into it, and is represented Ijy the darker poi-tions of the cut with central black spots. The crystallisation of enamel can be traced round each, and there would be five distinct bones or teeth. A third substance, however, is now secreted (which is represented by the white spaces), and is a powerful cement, uniting all these distinct bones into one body, and makino- one tooth of the five. This being done, another coat of enamel spreads over the sides, but not the top, and the tooth is completed. By no other con- trivance could we have the grinding tooth capable, "without injury and without wearing, to rub down the hay, and oats, and beans, which consti- tute the stable-food of horses. The grinders in the lower jaw, haA'ing originally but four of these bao-s or shells, are smaller, and narrower, and more regular than the upper ones. They are not placed horizontally in either jaw ; but in the lower the higher side is within, and shehnng gradually outward ; in the upper jaw the higher side is without, and shelving inward, and thus the grindino- motion is most advantageously performed. There is also an evident dif- ference in the appearance and structure of each of the grinders, so that a careful ob- server could tell to which jaw ever}" one belonged, and what situation it occupied. At the completion of the first year, a fourth grinder usually comes up, and the yearling has then, or soon afterwards, six nippers and four grinders above and below in each jaw, which, with the alteration in the appearance of the nippers that we ha,ve just described, will enable us to cal- culate nearly the age of the foal, subject to some variations arising from the period of weaning and the nature of the food. At the age of one year and a half, the mark in the central nippers will be much shorter and fainter ; that in the tAvo other pairs will have undergone an evident change, and all the nippers will be flat. 224 THE PROCESS OF TEETIIIXG. At two years tHs mil be more manifest. The ac company in o- cut deserves attention, as giving an accurate representation of the nippers in tlie lower jaw of the two-years-old colt. About this period a fifth grinder will appear, and now, likewise, will com- mence another j^rocess. The first teeth are adapted to the size and wants of the young animal. They are sufficiently large to occupy and fill the colt's jaws ; but when these bones have expanded with the increasing growiih of the animal, the teeth are separated too far from each other to be useful, and another aiid larger set is required. E\T.dent provision is made for them, even before the colt is foaled. In cavities in the jaw, beneath the first and temporary teeth, are to be seen the rudiments of a second and permanent set. These gTadually increase, some with greater rapidity than others, and, pressing upon the roots or fangs of the first teeth, do not, as would be imagined, force out the former ones, but the portion pressed upon gTadually disappears. It is absorbed — taken up, and carried away, by numerous minute vessels, whose office it is to get rid of the worn-out or useless part of the system. Tliis- absorption continues to proceed as the second teeth grow and press upwards, until the whole of the fang is gone, and the crown of the tooth, or that part of it which was above the gum, having no longer firm hold, drops out, and the second teeth appear, larger and stronger and pei'manent. In a few instances, however, the second teeth do not rise immediately under the temporary or milk teeth, but somewhat by their side ; and then, instead of this gradual process of absorption and disappearance from the point of the root upwards, the root being compressed sideways, diminishes through- out its whole bulk. The crown of the tooth diminishes with the root, and the whole is pushed out of its place, to the fore part of the first gi-inder, and remains for a considerable time under the name of a u-olfs tooth, caus- ing swelling and soreness of the gums, and frequently wounding the cheeks. They would be gradually quite absorbed, but the process might be slow and the annoyance would be great, and, therefore, they are extracted. The change of the teeth commences in those which earhest appeared, and, therefore, the front or first grinder gives way at the age of two years, and is succeeded by a larger and permanent tooth. During the period between the falling out of the central milk nippers, and the coming up of the permanent ones, the colt, having a bi'oken mouth, may find some difficulty in grazing. If he should fall away con- siderably in condition, he should be fed with mashes and corn, or cut meat. The next cut will represent a three -years -old mouth. The central teeth are larger than the others, with two gTooves in the outer convex surface, and the mark is long, narrow, deep and black. Not having yet attained their full growth, they are rather lower than the others. The mark in the two next nippers is nearly worn out, and it is wearing away in the comer nippers. Is it possible to give this mouth to an early two-years-old? The age of all horses used to be reckoned from May, but some are foaled even so early as Janiiary, and being actually four months over the two years, if they have been well nursed and fed, and are strong and large, they may, with the inexperienced, have an additional year put upon them. The central nippers are punched or drawn out, and the others appear three or four months earlier than they otheiwise would. In the natural process THE PEOCESS OF TEETHIIsG. 225 they could only rise by long pressing upon, and causing the absorption of the first set. But opposition from the first set being removed, it is easy to imagine that their progress will be more rapid. Three or four months Avill be gained in the appearance of the teeth, and these three or four months may enable the breeder to term hiua a late colt of a preceding year. To him, however, who is accustomed to horses, the general form of the animal — the little development of the fore-hand — the continuance of the mark on the nest pair of nippers — its more evident existence in the corner ones, some enlargement or iii'egularity about the gTims from the violence used in forcing out the teeth — the small gi'owth of the first and fifth grinders and the non-appearance of the sixth grinder, which, if it is not tkrough the gum at three years old, is swelKng under it, and preparing to get throuo-h — any or all of these circumstances, carefully attended to, ■R-ill be a sufficient security against deception. A horse at three years old ought to have the central permanent nippert. growing — the other two pairs wasting — six g-rinders in each jaw, above and below — the first and fifth level ^Wth the others and the sixth protruding. The sharp edge of the new incisors, although it coidd not be well expressed in the cut, will be very evident when compared with the neighboui'ing teeth. As the permanent nippers wear, and continue to grow, a narrower portion of the cone- shaped tooth is exposed to the atti'ition, and they look as if they had been compressed, but it is not so. The mark, of course, gradually disappears as the pit is worn away. At thi'ee years and a half, or between that and foui', the next pan* of nippers T\-ill be changed, and the mouth at that time cannot be mistaken. The central nippers -n-ill have attained nearly their full gTO-\%-th. A vacuity vrill be left where the second stood, or they will begin to peep above the gum, and the corner ones will be diminished in breadth, worn down, and the mark becoming small and faint. At this period, likewise, the second pair of grinders "\^-ill be shed. Pi*eviously to this may be the attempt of the dealer to give to his three-years-old an additional year, but the fraud will be detected by an examination similar to that which has been already described. At four years, the central nippers \dl\ be fully developed ; the sharp edge somewhat worn ofi", and the mark shorter, wider and fainter. The next pair will be up, but they ^vill be small, with the mark deep, and extending quite across them. The comer nippers will be larger than the inside ones, yet smaller than they were, and flat, and the mark nearly effaced. The sixth gi-inder will have risen to a level with the others, and the tushes will begin to aj^pear. Now, more than any other time, will the dealer be anxious to put an additional year upon the animal, for the difference between a four-years-old colt and a five- years -old-horse, in strength, utility and value, is very great ; but, the want of wear in the other nippers — the small size of the corner ones — the little Q 226 THE PKOCESS OF TEETHING. growth of the tush — the smaUness of the second grinder — the low fore- hand— the legginess of the colt, and the thickness and little depth of the mouth, Avill, to the man of common experience among horses, at once detect the cheat. The tushes (see below a, «) are four in number, two in each jaw, situated between the nippers and the grinders — much nearer to the former than the latter, and nearer in the lower jaw than in the uppor, but this distance increasing in both jaws with the age of the animal. In shape it somewhat resembles a cone ; it protrudes about an inch from the gum, and has its extremity sharp-pointed and curved. At the age now under consideration, the tushes are almost peculiar to the horse, and castration does not appear to prevent or retard their development. All mares, how- ever, have the germs of them iri the chambers of the jaw, and they appear externally in the majority of old mares. Their use is not evident. Per- haps, in the wild state of the animal, they are weapons of offence, and he is enabled by them more firmly to seize, and more deeply wound his enemy. The breeder often attempts to hasten the appearance of the tush, and he cuts deeply through the gum to remove the opposition which that would afford. To a little extent he succeeds. He may possibly gain a few weeks, but not more. After all, there is much uncertainty as to the appearance of the tush, and it may vary from the fourth year to fom' years and six months. It belongs, in the upper jaw, both to the inferior and superior maxillary bones ; for, Avhile its fang is deeply imbedded in the inferior maxillary, the tooth penetrates the process of the superior maxillary at the union of those bones. At four years and a half, or between that and five, the last important change takes place in the mouth of the horse. The corner nippers are shed, and the permanent ones begin to appear. The central nippers are considerably worn, and the next pair are commencing to show marks of usage. The tush has now jDrotruded, and is generally a fall half-inch in height ; externally it has a rounded prominence, with a groove on either side, and it is evidently hollowed within. The reader needs not to be told that after the rising of the corner nipper the animal changes its name — the colt becomes a horse, and the filly a mare. At five years the horse's mouth is almost perfect. The corner nippers are quite up, with the long deep mai-k irregular on the inside ; and the other nippers bearing e^^dent tokens of increasing wearing. The tush is much gTo^vn — the grooves have almost or quite disappeared, and the outer surface is regularly convex. It is still as concave within, and "svith the edge nearly as sharp, as it was six: months before. The sixth molar is quite up, and the third molar is wanting. This last circumstance, if the general appear- ance of the animal, and particularly his forehead and the wearing of the centre nippers, and the growth and shape of the tushes, are likewise carefully attended to, will prevent deception, if a late four-years-old is attempted to be substituted for a five. The nippers may be brought up a few months before their time, and the tushes a few weeks, but the gi-inder is with difficulty dis- placed. The three last grinders and the tu,shes are never shed. At sLx years the marli on the central nippers is worn out. There will THE PROCESS OF TEETHING. 227 still be a difference of colour in the centre of the tooth. The cement fill- ing the hole, made by the dipping in of the enamel, will present a broAvner hue than the other part of the tooth, and it will be evidently surrounded by an edge of enamel, and there A^all even remain a little depression in the centre, and also a depression round the case of ena- mel : but the deep hole in the cen- tre of the teeth, with the black- ened surface which it presents, and the elevated edge of emamel, will have disappeared. Persons not much accustomed to horses have been puzzled here. They ex- pected to find a plain surface of a uniform colour, and knew not what conclusion to draw when there was both discolouration and irregularity. In the next incisors the mark is shorter, broader, and fainter; and in the corner teeth the edges of the ena- mel are more regular, and the surface is e%4dently worn. The tush has attained its full growth, being nearly or quite an inch in length ; convex outward, concave "Nvithin ; tending to a point, and the extremity somewhat curved. The third grinder is fairly up ; and all the grinders are level. At six years old the profile of the mouth exhibits the teeth in a firm and upright position, which is gi-adually lost as the animal increases in age. The horse may now be said to have a perfect mouth. All the teeth are produced, fully grown, and have hitherto sustained no material inju-ry. During these important changes of the teeth the animal has suffered less than could be supposed possible. In children, the period of teething is fraught Avith danger. Dogs are sub- ject to convulsions, and hundreds of them die fi'om the irritation caused by the cutting or shedding of their teeth ; but the horse appears to feel little inconvenience. The g-ums and palate are occasionally somewhat hot and swollen ; but the slightest scarifi- cation will remove this. The teeth of the horse are more necessary to him than those of the other animals are to them. The child may be fed, and the dog will bolt his food ; but that of the horse must be well ground down, or the nutriment cannot be extracted from it. 2i8 THE PROCESS OF TEETIIIXG. At seven years, the mark, in tlie way in which we have described it, is worn out in the four central nippers, and fast wearing away in the comer teeth ; the tush also is beginning to be altered. It is rounded at the point ; rounded at the edges ; still round without ; and beginning to get round inside. At eight years old, the tush is rounder in every way ; the mark is gone from all the bottom nippers, and it may almost be said to be out of the mouth. There is nothing remain- ing in the bottom nippers that can afterwards clearly show the age of the horse, or justify the most experienced examiner in giving a positive opinion. Dishonest dealers have re- sorted to a method of prolonging the mark in the lower nippers. It is called hislioping. With an en- graver's tool a hole is dug in the now almost plain surface of the corner teeth, and in shape and depth resembling the mark in a seven-years- old horse. The hole is then burned with a heated iron, and a permanent black stain is left ; but the irregular appear- ance of the cavity, the dif- fusion of the black stain, and the general appearance of the mouth, can never deceive a carefal examiner. Horsemen, after the animal is eight years old, are accustomed to look to the nippers in the upper jaw, and some conclusion has been drawn from the appearances which they present. It cannot be doubted that the mark remains in them some years after it has been obliterated from the nippers in the lower jaw^ ; because the hard siibstance, a kind of cement by which the pit or funnel in the centre of the tooth is occupied, does not reach so high, and there is a greater depth of tooth to be worn away in order to come at it. To this it may be added, that the upper nippers are not so much exposed to friction and wear as the under. The lower jaw alone is moved, and pressed forcibly upon the food : the upper jaw is without motion, and has only to resist that presstire. There are various opinions as to the intervals between the disappearance of the marks from the different cutting-teeth in the upper jaw. Some have averaged it at two years, and others at one. The author is inclined to adopt the latter opinion, and then the age will be thus detennined : at nine years the mark will be worn out from the middle nippers, from the next pair at ten, and from all the upper nippers at eleven. During these periods the tush is likewise undergoing a manifest change ; it is blunter, shoi'ter, and rounder. In what degree this takes place in the different periods, long and most favourable opportunities for observation can alone enable the horseman to decide. The tushes are exposed to but little wear and tear. The friction against them must be slight, proceeding only from the passage of the food over them, and from the motion of the tongue, or from the bit ; and their alteration of form, although generally as we have described it, is fre- quently uncertain. The tush ^rill sometimes be blunt at eight ; at other times it will remain pointed at eighteen. The upper tush, although the latest in appearing, is soonest worn away. TPIE PROCESS OF TEETHIXG. 229 Are there any circumstances to guide our judgment after this ? There are those which will prepare us to gixess at the age of the horse, or to approach within a few years of it, until he becomes very old ; but there are none which will enable us accurately to determine the question, and the indications of age must now be taken from the shape of the upper surface of the nippers. At eight, they are all oval, the length of the oval running across from tooth to tooth ; but as the horse gets older, the teeth diminish in size, and this commencing in their width, and not in their thickness. They become a little apart from each other, and their siirfaces are rounded. At nine, the centre nippers are evidently so ; at ten, the others begin to have the oval shortened ; at eleven, the second pair of nippers are quite rounded ; and at thirteen, the corner ones have that appearance. At fourteen, the faces of the central nippers become some- Avhat triangular. At seventeen, they are all so. At nineteen, the angles begin to wear off, and the central teeth are again oval, but in a reversed direction, viz. from outward, inward ; and at twenty-one they all wear this form. This is the opinion of some Continental veterinary surgeons, and Mr. Percivall first presented them to us in an English dress. It would be folly to expect perfect accuracy at this advanced age of the horse, when we are bound to confess that the rules which we have laid down for determining this matter at an earlier period, although they are recogTiised by horsemen generally, and referred to in courts of justice, will not guide us in. every case. Stabled horses have the mark sooner worn out than those that are at grass ; and a crib-biter may deceive the best judge by one or two years. At nine or ten the bars of the mouth become less pro- minent, and their regular diminution A^^ll designate increasing age. At eleven or twelve the lower nippers change their original upright direction, and project forward or horizontally, and become of a yellow colour. They are yellow, because the teeth must grow in order to answer to their wear and tear ; but the enamel which covered their surface when they were first produced cannot be repaired, and that which wears this yellow colour in old age is the part Avhich in yoiitli was in the socket, and therefore des- titxTte of enamel. The gums have receded and wasted away, and the tushes are worn to stumps, and project directly outward. In connection with the age of the horse should be mentioned the valu- able information, for which we are indebted to Professor Simonds, of the Royal Veterinary College, on the age of other domesticated animals — in two lectures delivered before the Royal Agricultural Society of England, and which were published at the request of that body ; he very clearly elucidated the development of the teeth as indicative of the age of the ox, the sheep, and the pig. The result of his investigations, most systemati- cally pursued, would appear to be, that the ox has his teeth fully developed at from three years to three years and nine months old, the sheep at from three years to three years and a half, and the pig at one year and a half. 230 DISEASES OF THE TEETH. DISEASES OP THE TEETH. Of the diseases of the teeth in the horse we know little. Carious or hollow teeth are occasionally, but not often seen ; but the edges of the grinders, from the -wearing off of the enamel or the irregular growtli of the teeth, become rough, and wound the inside of the cheek ; it is then necessary to adopt a summary but effectual method of cure, namely, to rasp them smooth ; the outside edges of the gi-inders in the upper jaw alone require the application of the tooth rasp, and if the finger is carefully introduced inside the cheek, before and after its use, the result will be un- mistakeable. Many bad ulcers have been pi'oduced in the mouth by the neglect of this. The teeth sometimes grow iiTegularly in length, and this is particularly the case with the gi'inder<», from not being in exact opposition to each other when the mouth is shut. The growth of the teeth still going on, and there beincr no mechanical opposition to it, one of the back teeth, or a portion of one of them, shoots up considerably above the others. Sometimes it penetrates the bars above, and causes soreness and ulceration ; at other times it interferes partially, or altogether, with the grinding motion of the jaws, and the animal pines away without the cause being suspected. Here tbe saw should be used, and the projecting portion reduced to a level ■\vitb the other teeth. The horse that has once been subjected to this operation should afterwards be frequently examined, and especially if he loses condition : and, indeed, every horse that gets thin or out of condition, without fever, cr other apparent cause, should have his teeth and mouth carefully examined, and especially if, without any indication of sore throat, lie quids — partly chewing and then dropping — his food, or if he holds his head somewhat on one side, while he eats, in order to get the food between the outer edges of the teeth. A horse that has once had very irregular teeth is materially lessened in value, for, although they maybe sawn down as carefully as possible, they will project again at no great distance of time. Such a horse is to all intents and purposes unsound. In order to be fit for service, he should be in possession of his full natui^al powers, and these powers cannot be sustained without perfect nuti-ition, and nutrition would be rendered sadly imperfect by any defect in the operation of masti- cation. Not only do some disease.? of the teeth render the act of mastication difficult and troublesome, but, from the food acquiring a foetid odour during its detention in the mouth, the horse acquires a distaste for aliment altogether. The continuance of a carious tooth often produces disease of the neigh- bouring ones, and of the jaw itself It should therefore be removed, as soon as its real state is eWdent. Dreadful cases of fungus hagmatodes have arisen from the irritation caused by a carious tooth. The mode of extracting the teeth requires much reformation, and con- siderable improvements have been made in dental instruments by Mr. Go-\ving of Camden Town, by which the extraction or division of a tooth is considerably facilitated. The hammer and the punch should never be had recourse to. The keyed instrument of the human subject, but on a larger scale, is the only one that should be permitted. This is the proper place to speak more at length of the effect of dentition on the system generally. Horsemen in general think too lightly of it, and thev scarcely dream of the animal suffering to any considerable degree, or absolute illness being produced ; yet he who has to do ■^^^th young horses will occasionally discover a considerable degree of febrile affection, which he can refer to this cause alone. Fever, cough, catai'i-hal affections generally, DISEASES OF THE TONGUE. 231 dLsease of the eyes, cutaneous affections, diarrhoea, dysentery, loss ot appetite, and general derangement, will frequently be traced, by the carefu. observer, to irritation from teething. It is a rule scarcely admitting of the slightest deviation, that, when young horses are labouring under any febrile affection, the mouth should be examined, and if the tushes are prominent and pushing against the gums, a crucial incision should be made across them. ' In this way,' says ]\Ir. Percivall, ' I have seen catarrhal and bronchial inflammations abated, coughs relieved, lymphatic and other glandular tumours about the head reduced, cutaneous eruptions got rid of, deranged bowels restored to order, appetite returned, and lost condition repaired.' THE TONGUE. The tongue is the organ of taste. It i? also employed in disposing the food for being ground between the teeth, and afterwards^ collecting it together, and°convepng it to the back part of tiie mouth, in order to be swallowed. It is likewise the main instrument in deglutition, and the canal through which the water passes in the act of drinking. The root of it is firmly fixed at the bottom of the mouth by a variety of muscles; some of these muscles originate from the os liyoides or bone of the tongue, which constitutes its base, and is connected with the temporal bone, the larynx, and the pharynx ; the fore part is loose in the mouth. It is covered^ by a continuation of the membrane that lines the mouth, and which, doubling beneath, and confining the motions of the tongue, is called its frcenum, or bridle. On the back of the tongue, this membrane is thickened and rough- ened, and is covered with numerous conical papillce, or httle eminences, on which the fibres of the gustatory branch of the fifth pair, and the Glossa Pharyngeal nerves expand, communicating the sense of taste. The various motions of the tongue are accomphshed by means of the ninth pair of nerves. The substance of the tongue is composed of muscular fibres, with much fatty matter interposed between them, and which gives to this organ its peculiar softness. DISEASES OP THE TONGUE. The tongue is sometimes exposed to injury from carelessness or violence iu the act'of drenching or administering a ball, it being pressed against and cut by the edges of the grinders. A little diluted tincture of mjTrh, or alum dissolved in water, or even nature unassisted, will speedily heal the wound. The horse -w^ll sometimes bite his tong-ue, most frequently in his sleep. If the injury is trifling, it requires little care ; but,_ in some instances, a portion of the tongue has been deeply lacerated or bitten off. The assistance of a veterinary practitioner is here required.^ There are some interesting accounts of the results of this lesion, Mr, Dickens of Kimbolton relates a case, in the sixth volume of the 'Veterina- rian,' in which he found a portion of the tongue of a mare, extending as far as the frtenum beneath, lying in the manger in a strangely lacerated condition, and fast approaching to decomposition. He had lier cast, and, excising all the unhealthy portions, he dressed the wound with chloride ot soda and tincture of myrrh. In less than a week the laceration was nearly healed, and, soon afterwards, she could eat with very little difiiculty, and keep herself in good condition. The injury was proved to have been inflicted by a brutal horsebreaker, in revenge for some sHght affront. A curious case is recorded in the Memoirs of the Society of Calvados, A horse was diSicult to groom. The soldier who had the care of him, in order the better to manage him, fixed in his mouth and on his tongue a strong chain of iron, deeply serrated, while another man gave to this chain 232 THE SALIVARY GLANDS. a terrible jerk whenever tlie horse was disposed to be rebellious. Tlie animal, under such torture, became unmanageable, and the man "svho held the chain sawing away with all his strength, the tongue was completely cut off at the point which separates its base from the free portion of it. The wound healed favourably, and he was Boon able to manage a mash. After that some hay was given to him in small quantities. He took it and formed it into a kind of pellet with his lips, and then, pressing it against the bottom of his manger, he gradually forced it sufficiently back into the mouth to be enabled to seize it with his grinders. Another horse came to an untimely end in a singular way. He had scarcely eaten anything for three weeks. He seemed to be unable to swallow. The channel beneath the lower jaw had much enlargement about it. There was not any known cause for this, nor any account of violence done to the tongue. At length a tumour appeared under the jaw. Mr. Toung of Muirhead punctured it, and a considerable quantity of purulent matter escaped. The horse could drink his gruel after this, but not take any solid food. A week afterwards he was found dead. Upon separating the head from the trunk, and cutting transversely upon the tongue, nearly opposite to the second grinder, a needle was found lying longitudinally, and which had penetrated from the side to the inferior portion of the tongue. It was an inch and a quarter in length, and the neighbouring substance was in a state of gangrene. Vesicles will sometimes appear along the under side of the tongue, which will increase to a considerable size. The tongue itself will be much enlarged, the animal will be unable to swallow, and a great quantity of ropy saliva will drivel from the mouth. This disease often exists without the nature of it being suspected. If the mouth is opened, one large bladder, or a succession of bladders, of a pui'ple hue, will be seen extending along the whole of the under side of the tongue. K they are lanced freely and deeply, from end to end, the swelling wiU. very rapidly abate, and any little fever that remains may be subdued by cooling medicine. A mild solution of alum, applied by means of a small piece of sponge frequently during the day, will accelerate the cure. The cause of this disease is not clearly known. THE SALIVAE.Y GLANDS. In order that the food may be properly comminuted preparacory to digestion, it is necessary that it should be previously moistened. The food of the stabled horse, however, is dry, and his meal is generally concluded without any fluid being offered to him. Natui'e has made a provision for this. She has placed in the neighbourhood of the mouth various glands to secrete, and that plentifully, a limpid fluid, somewhat saline to the taste. This fluid is conveyed from the glands into the mouth, by various ducts, in the act of chewing, and, being mixed with the food, renders it more easily ground, more easily passed afterwards into the stomach, and better fitted for digestion. The principal of these is the parotid gland (see cut, p. 199). It is placed in the hollow which extends from the root of the ear to the angle of the lower jaw. The portion of it, q, is represented as turned up, to show the situation of the blood-vessels underneath. In almost every case of cold connected with sore throat, an enlargement of the parotid gland is evident to the feeling, and even to the eye. It is composed of numerous smalt glands connected together, and a minute tube proceeding from each, ta carry away the secreted fluid. Tliese tubes unite in one common duct. At the letter u, the parotid duct is seen to pass under the angle of the 'ower jaw, together with the submaxillary artery, and a branch of th* THE SALIVARY GLAXDS. 233 jugular vein, and they come out again at iv. At o; the duct is seen separated from the other vessels, climbing up the cheek, and piercing it to discharge its contents into the mouth, opposite to the second grinder. The quantity of fluid thus poured into the mouth from each of the parotid glands anaounts to a pint and a half in an hour, during the action of mastication ; and, sometimes, when the duct has been accidentally opened, it has spirted out to the distance of several feet. The parotid gland sjTtipathises with every inflammatory affection of the upper part of the throat, and therefore it is found swollen, hot, and tender, in almost every catarrh or cold. The catarrh is to be treated in the usual way ; while a stimulating appHcation, almost amounting to a blister, well rubbed over the gland, will best subdue the inflammation of that body. In bad strangles, and, sometimes, in violent cold, this gland will be much enlarged and ulcerated, or an obstruction will take place in some part of the duct, and the accumulating fluid will burst the vessel, and a fistulous ulcer be formed that will be very difficult to heal. Similar results may be produced by its being wounded by a lancet in opening an abscess, and it occasionally occurs from accidental wounds. The applica- tion of collodium, accompanied with the adhesive plaister, should be promptly had recoui'se to, as if the wound assumes a fistulous character the cure is tedious and difficult. A veterinaiy surgeon alone will be com- petent to the treatment of either case ; and the principle by which he will be guided will be to heal the abscess in the gland as speedily as he can, and, probably, by the application of the heated iron ; or, if the ulcer is in the duct, either to restore the passage through the duct, or to form a new one. A second source of the saHva is from the submaxillary glands, or the glands under the jaw. One of them is represented at s, p. 199. The submaxillary glands occupy the space underneath and between the sides of the lower jaw, and consist of numerous small bodies, each with its proper duct, uniting together, and fonning on each side a common duct or vessel that pierces through the muscles at the root of the tongue, and opens in httle projections, or heads, upon the frcenum, or bridle of the tongue, about an inch and a half from the front teeth. When the horse has catan'h or cold, these glands, like the parotid gland, enlarge. This is often to be observed after strangles, and several distinct kernels are to be felt under the jaw. It has ah-eady been stated that they may be disting-uished from the swellings that accompany or indicate glanders, by their being larger, generally not so distinct, more in the centre of the channel, or 3pace between the jaws, and never adhering to the jaw-bones. The farriers call them vives, and often adopt cruel and absurd methods to disperse them, — as burning them with a lighted candle, or hot iron, or even cutting them out. They vnll, in the majority of instances, gradually disperse in proportion as the disease which produced them subsides ; or they will yield to slightly stimulating embrocations ; or, if they are obsti- nate in their continuance, they are of no further consequence, than as indicating: that the horse has laboured under severe cold or stranoies. During catarrh, or inflammation of the mouth, the httle projections marking the opening of these ducts on either side of the bridle of the tongue are apt to enlarge, and the mouth under the tongue is a little red and hot and tender. The farriers call these swellings barbs or paps ; and as soon as they discover them, mistaking the effect of disease for the cause of it, they set to work to cut them close off". The bleeding that follows this operation somewhat abates the local inflammation, and affords temporary relief; but the wounds will not speedily heal. The saliva continues to flow from the orifice of the duct, and, running into the- 'lU STKANGLES. iiTegiilarities of tLo wouBd, causes it to spread and deepen. Even when it heals, the mouth of the duct being frequently closed, and the saliva con- tinuing to be secreted by the submaxillary gland, it accumulates in the dact, until that vessel bursts, and abscesses are formed which eat deeply ander the root of the tongue and long torment the poor animal. Wben, aftei' a great deal of trouble, they are closed, they are apt to break out again for months and years afterwards. All that is necessary with regard to these paps or barbs is to abate the inflammation or cold that caused them to appear, and they will very soon and perfectly subside. He who talks of cutting them out is not fit to be trusted with a horse. A third source of saliva is from glands under the tongue — the suh- lingual glands, which open by many little orifices, under the tongue resembling little folds of the skin of the mouth, hanging from the lower surface of this organ, or found on the bottom of the mouth. These like- wise sometimes enlarge during catarrh or inflammation of the mouth, and are called gigs, and hladders, and flaps in the inouth. They have the appearance of small pimples, and the farrier is too apt to cut them away, or bum them ofi". The better way is to let them alone — for in a few days they vrill generally disappear. Should any ulceration remain, a little tincture of myrrh, or a solution of alum, will readily heal them. Beside these three principal sources of saliva, there are small glands to be found on every part of the mouth, cheeks, and lips, which pour out a considerable quantity of fluid, to assist in moistening and preparing the food. STRANGLES. This is a disease principally incident to young horses — usually ap- pearing between the second and fourth year, and oftener in the spring than in any othe^' part of the year. It is preceded by cough, and can at first scarcely be distinguished from common cough, except that there is more discharge from the nostril, of a yellowish, colour, mixed with pus, and generally without smell. There is likewise a considerable discharge of ropy fluid from the mouth, and greater swelling than usual under the throat. This swelling increases with uncertain rapidity, accompanied by some fever, and disinclination to eat, partly arising from the fever, but more from the pain which the animal feels in the act of mastication. There is considerable thirst, but after a gulp or two the horse ceases to drink, yet is evidently desirous of continuing his draught. In the attempt to swallow, and sometimes when not drinking, a convulsive cough comes on, which almost threatens to suffocate the animal — and thence, probably, the name of the disease. The tumour is under the jaw, and about the centre of the channel. It soon fills the whole of the space, and is evidently one uniform body, and may thus be distinguished from glanders, or the enlarged glands of catarrh. In a few days it becomes more prominent and soft, and evidently contains a fluid. This rapidly increases ; the tumour bursts, and a great quantity of pus is discharged. As soon as the tumour has broken, the cough sub- sides, and the horse speedily mends, although some degree of weakness may hang about him for a considerable time. Few horses, possibly none, escape its attack ; but, the disease having passed over, the animal is free from it for the remainder of his life. Catarrh may precede, or may pre- dispose to, the attack, and, undoubtedly, the state of the atmosphere has much to do with it, for both its prevalence and its severity are connected with certain seasons of the year and changes of the weather. Messrs. Percivall and Castley have come the nearest to a satisfactory STRANGLES. 28.5 new of the nature of strangle;,. Mr. Castley in ' Tlio Yetermarian ' says that ' the period of strangles is often a much more trying and critical tune for youno- horses than most people seem to be aware of; that when colts eet well over this complaint, they generally begin to thrive and improve hi a remarkable manner, or there is sometimes as great a change for the worse : in fact, it seems to effect some decided constitutional change in the animal.' , , Mr Percivall adds, 'The explanation of the case appears to me to be, that the animal is suffering more or less from what I would call strangle fever— 0. fever the disposition and tendency of which is to produce local iumoui' and abscess, and most commonly in that situation underneath the iaws in which it has obtained the name of strangles.' _ '' Professor Dick, of Edinburgh, adds that which is conclusive on the sub- iect that ' althouo-h the disease commonly terminates by an abscess under the 'jaw, yet it may, and occasionally does, give rise to coUections of matter on other parts of the surface.' _ _ ^i , ^ i • To this conclusion then we are Avarranted m coming,— that sti-angles is a specific affection to which horses are naturally subject at some period ot their Hves and the natural cure of which seems to be a suppurative pro- cess From some cause, of the nature of which we are ignorant, this suppurative process usually takes place in the space between the branches of the maxillary bone, and occurring there it appears m the mildest iorm, and little danger attends. When the disease is ushered m by considerable febrile disturbance, and the suppuration takes place elsewhere, the horse too frequently sinks under the attack. r xi t The treatment of strangles is very simple. As the essence of the dis- ease consists in the formation and suppui-ation of the specific tumour, the principal or almost the sole attention of the practitioner should be directed to the hastening of these processes: therefore, as soon as the tuinour of strano-les is decidedly apparent, the part should be actively bhstered. Old practftioners used to recommend poultices, which, from the thickness of the horse's sk-ln, must have very little effect, even if they could be confined on the part ; and from the difficulty and almost impossibility of this, and their getting cold and hard, they necessarily weakened the energies of nature! and delayed the ripening of the tumour. Fomentations are little more effectual. A blister ^^-ill not only secui-e the completion of the pro- cess, but hasten it by many days, and save the patient muchpam and ex- haustion It ^dll produce another good effect— it will, previously to the opening of the tumour, abate the internal inflammation and soreness of the throat,°and thus lessen the cough and wheezing. As soon as the swelling is soft on its surface, and evidently contains matter, it should be freely and deeply lanced. It is a bad, although fre- ouent practice, to suffer the tumour to burst naturally, for a ragged ulcer is formed very slow to heal, and difficult of treatment. If the mcision is de«p and' large enough, no second collection of matter will be formed . fjxd that which is akeady there may be suffered to run out slowly all pressure Avith the fingers being avoided. The part should be kept clean, and a Httle Friar's balsam daily injected into the wound. The remainder of the treatment ^vill depend on the symptoms If there is much fever, and evident affection of the chest, which should carefuUy be distinoTiished from the oppression and choking occasioned by the pres- sure of the tumour, it will be proper to give cooling medicines, as nitre, emetic tartar, and perhaps digitalis, as the case requu^es. The_ appeti e, or, rather, the ability to eat, will generally return with the opening of the abscess. Bran-mashes, fresh-cut grass or tares, should be liberally sup- phed which will not only afford sufficient noui-ishment to recruit tho 236 THE ANATOMY A^'D DISEASES OF THE XECK. Btrength of the animal, but keep the bowels gently open. In cases of debihtj, a small quantity of tonic medicine, as chamomile, gentian, or ginger may be administered. It must however be borne in mind, that in a great majority of cases, little or no treatment is required, and in very many instances, the disease in colts has mn its course altogether unnoticed. On the other hand, it occasionally is productive of great suffeiing, and this is more especially the case where the abscess bursts internally, when, to use the graphic account of Mr, Percivall in the sixth volunae of ' The Veterinarian,' 'while purulent matter is issuing in profusion from his swollen nostrils, and slaver foams out from between his tumified lips, it is distressing to hear the noise that he makes in painful and laboured efforts to breathe. There is imminent danger of suffocation in such a case as this ; and even although some relief, so far as the breathing is concerned, may be obtained from the operation of tracheotomy, yet, from the pain and iiTitation he is suffering, added to the impossibility of getting aliment into his stomach, he must speedily sink to rise no more.' — Veterinarian, vol. vi. p. 611. CHAPTER XL THE ANATOMY AND DISEASES OF THE NECK AND NEIGHBOURING PARTS. The neck of the horse, and of every animal belonging to the class mam- malia, except one species, is composed of seven bones called vertehrce, moveable or turning upon each other (see cut, p. 140). They are con- nected together by strong ligaments, and form so many distinct joints, in order to give sufficiently extensive motion to this important part of the body. The bone nearest to the skull is called the atlas, because, in the human being, it supports the head. In the horse the head is suspended fi-om it. It is a mere ring-shaped bone, with broad projections sideways ; tut with- out the sharp and irregular processes which are found on all the others. The second bone of the neck is the dentata, having a process like a tooth, by which it forms a joint with the first bone. In the formation of that joint, a portion of the spinal marrow, which mns through a canal in the centre of all these bones, is exposed or covered only by ligament ; and by the di^asion of the marrow at this spot an animal is instantly destroyed. The operation is called pithing, from the name {the pith) given by butchers to the spinal marrow. The other neck or rack bones, as they are denominated by the farrier (B, p. 140), are of a strangely irreg-ular shape, yet bearing considerable resemblance to each other. They consist of a central bone, perforated for the passage of the spinal marrow with a ridge on the top for the attachment of the ligament of the neck, and four irregular plates or processes from the sides, for the attachment of muscles ; at the base of one of which, on either side, with the exception of the seventh, are holes for the passage of the vertebral arteries. At the upper end of each is a round head or ball, and at the lower end a cavity or cup, and the head of the one being received into the cup of the other, they air united together, forming so many joints. They are likewise united by ligaments from these processes, as well as the proper ligaments of the joints, and so securely, that no dis- location can take place between any of them, except the first and second, the consequence of which would be tlie immediate deo,th of the animal. The last, or seventh bone, has the elevation on the back or top c>^ it THE MUSCLES AXD TROPER FORM OF THE NECK. 23/ continued into a lonpf and sharp prolongation (a spinous process'), and is the beginning of that ridge of bones denominated the tvitliers (see cuts, pp. 140 and below) ; and as it is the base of the column of neck bones, and there must be a great pressure on it from the weight of the head and neck, it is curiously contrived to rest upon and unite with the two first ribs. THE MUSCLES AND PEOPER POEM OF THE NECK. The bones of the neck serve as the framework to which numerous muscles concerned in the motions of the head and neck are attached. The weight of the head and neck is supported by the ligament without muscular aid, and without fatigue to the animal ; but in order to raise the head higher, or to lower it or turn it in every direction, a comphcated system of muscles is necessary. Those whose office it is to raise the head are most niinierous and powerful, and are placed on the upper and side part of the neck. The cut in p. 199 contains a few of them. c marks a tendon common to two of the most important of them, the splenius or sj^Hnt-like muscle, and the complexu? ruajor, or larger comph- cated muscle. The spJenius arises from the processes of all the bones of the neck with the exception of the last three, and posteriorly from the sides of the anterior dorsal vertebraB with tendons running from the upper part of it to the first bone of the neck, and to a process of the temporal bone of the head. Its action is sufficiently evident, namely, very powerfully to elevate tlie head and neck. The principal beauty of the neck depends on this muscle. It was admirably developed in the horse of whose neck the annexed cut gives an accurate •delineation. If the curve were quite regular from the poll to the withers, we should call it a perfect neck. It is rather a long neck, and we do not like it the less for that. In the carriage-horse, a neck that is not half concealed by the collar is indispensable, so far as appearance goes ; and it is only the horse with a neck of tolerable length that can bear to be reined up, so as to give this part the arched and beautiful appearance which fashion demands. It is no detriment to the riding-horse, and there are few horses of extraordinary speed that have not the neck rather long. The race-horse at the top of his s^^eed not only extends it as far as he can, that the air j^assages may be as straight as he can make them, and that he may therefore be able to breathe more freely, but the weight of the head and neck, and the effect increasing -^ith their distance from the trunk, add materially to the rapidity of the animal's motion. It has been said, that a horse with a long neck will bear heavy on the hand ; neither the length of the neck nor even th3 bulk of the head has any influence in causing this. They are both counterbalanced by the power of the ligament of the neck. The setting on of the head is most of all connected "wath hea^-y bearing on the hand, and a short-necked horse will bear heavily, because, from the tliickness of the lower part of the neck, consequent on its shortness, the head cannot be rightly placed, nor, generally, the shoulder. Connected with the splenitis muscle, and partly produced by it, are the thickness and muscularity of the neck, as it springs from the shoulders, in i38 THE MUSCLES AND TROrER FORM OF THE XECK. tliis cut ; tlie height at wliicli it comes out from tliem forming nearly a li!ie with the withers ; and the manner in which it tapers as it approaches the head. The neck of a well-formed horse, however fine at the top, should be muscular at the bottom, or the horse will generally be weak and worthless. Necks devoid of this muscularity are called loose necks by horsemen, and are always considered a very serious objection to the animal. If the neck is thin and lean at the upper part, and is other-^vise well shaped, the horse will usually carry himself Avell, and the head will be properly curved for beauty of appearance and ease of riding. When an instance to the contrary occurs, it is to be traced to very improper management, or to the space between the jaws being unnaturally small. The splenitis muscle, although a main agent in raising the head and neck, may be too large, or covered with too much cellular substance or fat, thua giving an appearance of heaviness or even clumsiness to the jeck. This peculiarity of form constitutes the distinction between the perfect horse and the mare, and also the gelding, unless castrated at a very late period. This tendon belongs also to another muscle, which makes up the principal bulk of the lower part of the neck, and is called the complexus major, or larger complicated muscle. It arises partly as low as the transverse processes of the four or five first bones of the back, and from all the bones of the neck, except the first ; and the fibres from these various sources uniting together, fonn a very large and powerful muscle, the largest and strono-est in the neck. As it approaches the head, it lessens in bulk, and terminates partly -nnith the splenius, in this tendon, but is principally inserted into the back part of the occipital bone, by the side of the ligament of the neck. Its ofiice is to raise the neck and elevate the head ; and beino- inserted into such a part of the occiput, it will more particularly protrude the nose, while it raises the head. Its action, however, may be too powerful ; it may be habitually so, and then it may produce deformity. The back of the head being pulled back, and the muzzle protruded, the horse cannot by possibility carry his head well. He will become what is technically called a star-gazer ; — heavy in hand, boring upon the bit, and unsafe. To remedy this, recourse is had, and in the majoi'ity of cases without avail, to the martingale, against which the horse is continually fio-hting, and which is often a complete annoyance to the rider. Such a horse is almost useless for harness. Inseparable from this is another sad defect, so far as the beauty of the horse is concerned; — he becomes eice-neclced ; i.e. he has a neck like a ewe — not arched above, and straight below, until near to the head, but hollowed above and projecting beloAv ; and the neck rising low out of the chest, even lower sometimes than the points of the shoulders. There can scarcely be anything more unsightly in a horse. His head can never be got fairly down, and the bearing reigTi of harness must be to him a source of constant torture. In regarding, however, the length and the form of the neck, reference must be had to the pui-pose for which the horse is intended. In a hackney few things can be more abominable than a neck so disproportionable, so long that the hand of the rider gets tired in managing the head of the horse. In the race-horse this lengthening of the neck is a decided advantage. AmontT the muscles employed in raisuig the head, are the complextis minores (smaller complicated), and the recti (straight), and the oblique muscles of the upper part of the neck, and belonging principally to the two first bones of the neck. Amon"- the muscles employed in lowering the head, some of which are given in the same cut, is the sterno-maxillaris, d, belonging to the breast- bone and the lower jaw. It can likewise be traced, although not quite. THE BLOOD-VESSELS OF THE NECK. 2a9 distinctly, in the cnt, page 237. It lies immediately under tlie skin, pro- jecting from, or constituting, the front of the breast bone (H, p. 140), and proceeds up the neck, of no great bulk or strength. At about three-fom-ths of its length upward, it changes to a flat tendon, which insinuates itself between the parotid and submaxillary glands, in order to be inserted into the angle of the lower jaw. It is used in bending the head towards the chest. Another muscle, the termination of which is seen, is the levator Jnimeri, raiser of the shoulder (b, p. 199). This is a much larger muscle than the last, because it has more duty to perfonn. It rises from the back of the head and four first bones of the neck and the ligament of the neck, and is carried down to the shoulder, mixing itself partly •v\^th some of the muscles of the shoulder, and finally continued doAvn to and terminating on the humerus (J, p. 140). Its office is double. If the horse is in action, and the head and neck are fixed points, the contraction of this muscle will draw forward the shoulder and ann ; if the horse is standing, and the shoulder and arm are fixed points, this muscle will depress the head and neck. The muscles of the neck are all in pairs. One of them is found on eacli side of the neck, and the ofiice which has been attributed to them can only be accomplished when both act together ; but supposing that one alone of the elevating muscles should act, the head would be raised, but it would Rt the same time be turned towards that side. If one only of the depressor muscles were to act, the head would be bent downwards, but it woiild like- wise be turned towards that side. Then it will be easily seen that by this simple method of having the muscles in paLrs, provision is made for every kind of motion, upwards, do^ATiwards, or on either side, for Avhich the animal can possiblj" have occasion. Little more of a practical natui-e could be said of the muscles of th^i) neck, although they are proper and interest- ing studies for the anatomist. This is the proper place to speak of the mane, that long hair which covers the crest of the neck, and adds so much to the beauty of the animal. This, however, is not its only praise. In a wild state the horse has many battles to fight, and his neck deprived of the mane would be a vulnerable part. The hair of the mane, the tail, and the legs, is not shed in the same manner as that on the body. It does not fall so regularly nor so often ; for if all were shed at once, the parts would be left for a long time defence- less. The mane is generally dressed so as to lie on the right side — some per- sons divide it equally on both sides. For ponies it used to be cut off near the roots ; only a few stumps being left to stand perpendicularly. This was termed the hog-mane. The groom sometimes bestows a great deal of pains in getting the mane of his horse into good and fashionable order. It is wetted, plaited, and loaded with lead ; and every hair that is a little too long is pulled out. The mane and tail of the heavy draught-horse are seldom thin, but on the well-bred horse the thin and well-arranged mane is ornamental. THE BLOOD-VESSELS OF THE NECK. Running down the under part of the neck are the principal blood-vessels going to and returning from the head, with windpipe and gullet. The external arteries are the carotid, of which there are two. They ascend the neck on either side, close to the Avindpipe, until they have reached the middle of the neck, Avhere they somewhat diverge, and he more deeply. They are covered by the sterno-maxillaris muscle, which has been just described, and are separated from the jugulars by n. small portion of '«J40 POLL-EVIL. muscular substance. Having readied the larjnx, tliey divide into three branches, the external, the internal, and the ramus anastomaticus ; the first goes to every part of the face, the second to the brain, and the third to join the vertebral artery. The vertebral arteries run through canals in the bones of the neck, with the exception of the seventh, supplying the neighbouring parts as they advance, and at length form the junction before stated with the third branch of the carotid, and i-ainify on and supply the brain. Few cases can haj^pen in which it would be either necessary or justifiable to bleed from an arteiy. Even in mad-staggers the bleeding is more practicable, safer, and more effectual, from the jugular vein than from the temporal or any other artery. If an artery is opened in the direction in which it runs, there is sometimes very great difficulty in stopping the bleeding ; it has even been necessary to tie the vessel in order to accompHsh this purpose. If the artery is cut across, its coats are so elastic that the two ends are often immediately drawn apart under the flesh at each side, and are thereby closed ; and after the first gush of blood no more can be obtained. THE VEINS OE THE NECK. The external veins which return the blood from the head to the heart are the jug-ulars. The horse has but one on either side. The human being and the ox have two. The jugular takes its rise from the base of the skull ; it then descends, receiving other branches in its way towards the angle of the jaw and behind the parotid gland ; and emerging thence, and being united to a large branch from the face, it takes its coui^se down the neck. Veterinary surgeons and horsemen have agreed to adopt the jugular, a httle way below the union of these two branches, as the usual place for bleeding ; and a very convenient one it is, for it is easily got at, and the vessel is large. The manner of bleeding, and the states of con- stitution and disease in which it is proper, will be hereafter spoken of. POLL-EVIL. From the horse rubbing and sometimes striking his poll against the lower edge of the manger, or hanging back in the stall and bruising the part with the halter, — or from the frequent and painfiil stretching of the ligaments and muscles by unnecessary tight reining, and, occasionally, from a violent blow on the poll, carelessly or wantonly inflicted, inflamma- tion ensues, and a swelling appears, hot, tender, and painfal. It used to be a disease of frequent occurrence, but it is now, from better treatment of the animal, of comparatively rare occurrence. It has just been stated that the ligament of the neck passes over the atlas, or first bone, without being attached to it, and the seat of inflamma- tion is between the ligament and the bone beneath ; and being thus deeply situated, it is serious in its nature and difiicult of treatment. Another cause, especially amongst cart-horses, is the injury inflicted to the poll by forcing a small collar over the animal's head. To these also may be added hereditary predisposition. Many instances are on record of the stock from parents suffering from poll-evil becoming affected with the same disease. The first thing to be attempted is to abate the inflammation by bleeding, physic, and the application of cold lotions to the part. In a very early period of the case, a blister might have considerable effect. Strong purga- tives should also be employed. By these means the tumour will sometimes •be dispersed. This system, however, must not be pursued too far. K the •Bw«>^Ung increases, and the heat and tenderness Likewise increase, matter INFLAMMATION OF THE VEIN '241 will form in the tumour ; and then our object should be to hasten its for- mation by warm fomentations, poultices, or stimulating embrocations. As soon as the matter is formed, Avhich may be kno'vvn by the softness of the tumour, and before it has time to spread around and extend into the neighbouring parts, it should be evacuated. Now comes the whole art of treating poll-evil ; the ojfeniyig into the tumour must le so contrived that all the matter shall run out, and continue afterwards to run out as quickly as it is formed, and not collect at the bottom of the ulcer, irritating and corroding it. This can be effected by a seton alone. The needle should enter at the top of the tumour, penetrate through its bottom, and be brought out at the side of the neck, a little beloAv the abscess. Without anything more than this, except frequent fomentation Avith warm water, in order to keep the part clean, and to obAnate inflammation, poll-evil in its early stage will frequently be cured. K the ulcer has deepened and spread, and threatens to eat into the liga- ments of the joints of the neck, it may be necessary to stimulate its surface, and perhaps painfully so, in order to bring it to a healthy state, and dis- pose it to fill up. In extreme cases, some highly stimulating application may be employed, but not the scalding mixture of the farriers of the olden time. All measures, however, will be inefiectual, unless the pus or matter is, by the use of setons, or by a free and extensive incision, perfectly evacuated. The apphcation of these setons or the making the incision will require the skill and anatomical knowledge of the veterinary surgeon. In desperate cases, the wound may not be fairly exposed to the action of the caustic without the division of the hgament of the neck. This may bo effected with perfect safety ; for although the Hgament is carried on to the occipital bone, and some strength is gained by this prolongation of it, the naain stress is on the second bone, and the head will continue to be sup- ported. The divided ligament, also, will soon unite again, and its former usefulness will be restored when the wound is healed. INFLAMMATION OP THE VEIN. It is usual and proper, after bleeding, to bring the edges of the wound carefully together, and to hold them in contact by inserting a pin through the skin, T\T.th a little tow twisted round it. In ninety-nine cases out of a hundred the wound quickly heals, and gives no trouble ; but in a few instances, from using a blunt instrument, or a dirty or rusty one ; or striking too hard and bruising the vein ; or, in the act of pinning up, pulling the skin too far from the neck and suffering some blood to insinuate itself into the cellular texture ; or neglecting to tie the horse up for a H^-tle whUe, and thus enabling him to rub the bleeding place against the manger and tear out the pin ; or from the animal being worked imme- diately afterwards ; or the reins of the bridle rubbing against it ; or several blows having been clumsily given, and a large and ragged wound made ; or from some disposition to inflammation about the horse (for the bleeder is not always in fault), the wound does not heal, or, if it closes for a little while, it re-opens. A slight bleeding appears — some tumefaction com- mences— the edges of the orifice separate, and become swollen and red — a discharge of sanious bloody fluid proceeds from the wound, followed, perhaps, in a few days, by purulent matter. The neck swells, and is hot and tender both above and below the incision. The lips of the wound become everted — the swelling increases, particularly above the wound, where the vein is most hard and cordy — the horse begins to loathe his food, and little abscesses form round the orifice. The cordiuess of the vein rapidly increases. Not only the vein itself has become obstructed and its K 5142 I^'FLu\MMATION OF THE VEIX. coats thickened, but the cellular tissue inflamed and hardened, and is an additional soui'ce of in'itation and torture. Human surgeons say that inflammation of a vein spreads totvards the heart. In the horse, and we will venture to say in every animal, it spreads in the direction in which the coagulation is formed, and that in the jugular must be upward, although from the heart. In the veins of tho arm and leg it will likewise spread upward, and then towards the heart, because the coagulation takes place in that direction. The two grand questions here are, the cause and the cure. The first would seem to admit of an easy reply. A long list of circumstances has been just given which would seem to refer the matter entirely to the operator ; yet, on the other hand, experience tells us that he has little to do with these morbid effects of bleeding. Mr. Percivall states, that Mr. Cherry tried several times to produce inflammation by the use of rusty lancets, and escharotics of various kinds, and ligatures, and frequent sepa- ration and friction of the granulating edges, but in vain. Professor Spooner tried to produce the disease, but could not. On the other hand, it is well known, that while inflammation rarely or never follows the operation of bleeding by some practitioners, others are continually getting into scrapes about it. The writer of this work had three house-pupils, two of whom he used to trust to bleed his patients, and no unto^^'ard cu'cumstance ever occurred ; but as surely as he sent the third, he had an inflamed vein to take care of. There is something yet undivulged in the process of healing the vein, or in the cii'cumstances by which that healing is prevented. The most powerful causes probably are, that the lips of the wound have not been brought into immediate apposition, or that a portion of the hair — a single hair is sufiicient — has insin^^ated itself. The horse has not, perhaps, had his head tied up to the rack after bleeding, which should always be done for at least an hour, during which time the extravasated blood Avill become firmly coagulated, and the flow of blood to the heart will establish its uninterrupted course. It is also probable that atmospheric agency may be concerned in the affair, or a diseased condition of the horse, and par- ticularly a susceptibility of taking an inflammatory action, although the exciting cause may be exceedingly slight. Of the means of cure it is difficult to speak confidently. The wound fihould be carefully examined — the divided edges brought into exact apposition, and any hair interposed between them removed — the pin with- drawn— the part carefully and long sponged with cold water, repeated at short intervals day and night — the head should be kept steadied by being tied short to the rack, and cold slop diet alone allowed ; the effect of the cold water will be aided by the addition of spirits of wine, which will increase the evaporation, and the application of ice itself, if obtainable, is very desirable. In six-and-thirty hours, should not the appearance of the wound have improved, should not the very circumscribed swelling around it have subsided, apply a bhster, the size of a crown, immediately over the wound; the prompt use of this remedy will in very many instances cut short the disease. If two or three days have passed and the discharge still remains, the apph'cation of the budding iron — not too large or too hot — may produce engorgement of the neighbouring parts, and union of the lips of the wound. This should be daily, or every second day, repeated, according to circum- stances. The blister may be repeated over the orifice, and should not the Lips of the incision be united, a solution of the sulphate of zinc or sulphate of copper may be injected twice a day : this is the mode of treatment the veterinary surgeon consulted would most probably adopt. ' Sometimes,' THE CHEST. 243 says Mr. Cartwriglit, in tlie fourtli volume of tlie abstracts of tlie Veterinary Medical Association, ' when the vein is in an ulcerative state I have laid it open, and applied canstic dressing, and it has healed up. I have lately had a case in which five or six abscesses had formed above the original wound, and the two superior ones burst through the parotid gland, tho extent of the ulceration being evident in the quantity of saliva that flowed through each orifice.' But another very serious result of an inflamed vein is one but rarely noticed, and to wldch too little attention has been paid, but which when it does occur is of a sufficiently alarming character ; this is secondary haemorrhage — the ulcerative process has extended to the vein itself, and a most profuse bleeding ensues. Pressure by any means, with considerable elevation of the head, is the only immediate check, until the arrival of the veterinary surgeon, when the application of a ligature round the vein ahove the orifice constitutes the permanent cure. In four cases, in our country practice, this operation perfectly succeeded. The owner of the horse will find it his interest to apply to a veterinary practitioner as soon as a case of inflamed vein occurs. Should the vein be destroyed, the horse will not be irreparably injured, and perhaps, at no great distance of time, scarcely injured at all ; for nature is ingenious in making provision to carry on the circulation of the blood. All the vessels conveying the blood from the heart to the different parts of the frame, or bringing it back again to the heart, communicate "mth each other by so many channels, and in such various ways, that it is impossible by the closure or loss of any one of them long materially to impede the flow of the vital current. If the jugular is destroyed, the blood will cii^culate through other vessels almost as freely as before ; but the horse could not be considered as sound, for he might not be equal to the whole of the work required of him. CHAPTER XII. THE CHEST. The chest, in the horizontal position in which it is placed in the cut, is of a somewhat oval figure, with its extremities truncated. The spine is its- roof; the sternum, or breast, its floor; the ribs, its sides; the trachea, oesophagus, and great blood-vessels passing through its anterior extremity and the diaphragm, being its posterior. It is contracted in front, broad and deep towards the central boundary, and again contracted posteriorly. It encloses the heart and the lungs, the origin of the arterial, and the termination of the venous trunks and the collected vessels of the absorbents. The windpipe penetrates into it, and the oesophagus traverses its whole extent. A cavity whose contents are thus important should be securely defended. The roof is not composed of one unyielding prolongation of bone, which might possibly have been strong enough, yet would have subjected it to a thousand rude and dangerous shocks ; but there is a curiously- contrived series of bones, knit together by strong ligaments and dense fibro- cartilaginous substance, forming so many joints, each possessed but of httle individual motion, but the whole united and constituting a column of such exquisitely-contrived flexibility and strength, that all concussion is avoided, and no external violence or weight can injure that which it protects. It ig supported chiefly by the anterior extremities, and beautiful are the b2 244 THE CHEST. contrivances adopted to prevent injurious connection. There is no inflexible bony union between the shoulders and the chest ; but while the spine is formed to neutralise much of the concussion that might be received- — while the elastic connections between the vertebrae of the back, alternately afibrding a yielding resistance to the shock, and regaining their natural situation when the external force is removed, go far, by this playful motion, to render harmless the rudest motion — there is a provision made by the attachment of the shoulder-blade to the chest calculated to prevent the possibility of any rude concussion reaching the thorax. ' Had,' says Mr. fMss^^ « The first rib. b The cartilages of the ten hindermost, ov false ribs, connected together, and uniting with that of the eighth or last true rib. c The breast-bone. d The top, or point, of the withers, which are formed by the lengthened spinous, or upright processes of the ten or eleven first bones of the back. The bones of the back are eighteen in number. e The ribs, usually eighteen on each side ; the eight first united to the breast-bone by cartilage ; the cartilages of the remaining ten united to each other as at h f That portion of the spine where the loins commence, and composed of five bones. g The bones forming the hip, or haunch, and into the cavity at the bottom of which the head of the thigh-bone is received. h The portion of the spine belonging to the haunch, and consisting of five pieces called the sacrum. i The bones of the tail, usually thirteen in number. Percivall in the fifteenth volume of ' The Veterinarian,' ' the entire rib been one solid piece of bone, a violent blow might have broken it to pieces. On the other hand, had the ribs been composed from end to end of cartilage only, the form of the arch could not have been sustained, but, sooner or later it must have bent inward, and so have encroached upon the cavity of the chest as to have compressed the organs of respiration and circulation to that degree that could not but have ended in suffocation and death of the animal. It was only the judicious and well-arranged combination of bone and gristle in the construction of the chest that could answer the ends an all- wise Providence had in view.' At the shoulder is a muscle of immense strength, with tendinous composition, the serratus magims, spreading over one-third of the internal surface of the shoulder-blade and extending to the four last cervical vertebrae and a portion of the chest. A spring of easier play could not have been attached to the carriage of any invalid. It is a carriage hung by springs between the scapula?, and a delightful one it is for easy travelling ; while there is combined vnth it, and the union is not a little difficult, strength enough to resist the jolting of the roughest road and the most rapid pace. Laterally there is sufficient defence against all common injury by the expansion of the shoulder over the chest from between the first and second THE CHEST. 246 tx) the seventh rib ; and behind and below that there is the bony structure of the ribs, of no little strength ; and their arched form, although a flattened arch ; and the yielding motion at the base of each rib, resulting from its jointed connection with the spine above and its cartilaginous union with the sternum below. A still more important consideration with regard to the parietes of the thorax is the manner in which they can adapt themselves to the changing bulk of the contents of the cavity. The capacity of the chest is little affected by the external contraction and dilatation of the heart, for when its ventricles are collapsed its auricles are distended, and when its auricles are compressed its ventricles expand ; but with regard to the lungs it is a very different affair. In their state of collapse and expansion they vary in comparative bulk, one- sixth part or more, and, in either state, it is necessary for the proper discharge of the function of respiration that the parietes of the chest should be in contact with them. The ribs are eighteen in number on either side. Eight of them are perfect, and commonly called the true, or, more properly, sternal ribs, extending from the spine to the sternum. The remaining ten are posterior and shorter, and are only indirectly connected with the sternum. The ribs are united to the corresponding vertebrae or bones of the spine, so as to form perfect joints — or rather, each rib forms two joints. The head of the rib is received between the vertebrae or bones of the spine, oefore and behind, so that it shall always present two articulating surfaces, one opposed to the verterbra immediately before, and the other to that immediately behind, and each forming a distinct joint, with a perfect capsular ligament, and admitting of a rotatory motion. The tubercle o^ the rib seems to be received into the cartilaginous ligamentous substance between the vertebree, and is articulated to the transverse process of the posterior vertebrae connected with the head. Nothing could be more admirably devised for motion, so far as it is required, and for strength of union, that can scarcely be broken. Before the ribs reach the sternum, they terminate in a cartilaginous prolongation, or the lower part of the rib may be said to be cartilaginous ; and where it unites with the sternum there is a third joint, with a perfect and complete capsular ligament. The cartilage of the posterior ribs are also united to the bony portion. They are not, however, prolonged so far as the sternum ; but the extremity of one lies upon the body of that which is immediately before it, bound down upon it by a cellular substance approaching to the nature of ligament, jei each having some separate motion, and all of them connected indirectly with the sternum by means of the last sternal rib. It is an admirable contrivance to preserve the requisite motion which must attend every act of breathing, every extension and contraction of the chest, vnih a degree of strength which scarcely any accident can break through. The Sternum, or breast-bone, is more complicated than it at first appears to be. It constitutes the floor of the chest, and is a long flat spongy bone, fixed between the ribs on either side, articulating with their cartilages, and serving as a point of support to them. It is composed of from seven to nine pieces, united together by cartilage ; and whatever changes may take place in other parts of the frame, this cartOage is not converted to bone even in extreme old age, although there may, possibly, be some spots of ossific matter found in it. The point of the breast-bone may be occasionally injured by blows or by the pressure of the collar. It has been, by brutal violence, completely broken off from the sternum ; but offcener, and that from some cruel usage. 246 THE CHEST. a kind of tumour has been formed on the point of it, which has occasionally ulcerated, and proved very difficult to heal. The front of the chest is a very important consideration in the structure of the horse. It should be prominent and broad, and fall, and the sides of it well occupied. When the breast is narrow, the chest has generally the same appearance ; the animal is flat-sided, the proper cavity of the chest is less, and the stamina of the horse are materially diminished, although, perhaps, his speed for short distances may not be alFected. When the chest is narrow and the fore legs are too close together, in addition to the want of bottom they will interfere with each other, and there will be wounds on the fetlocks and bruises below the knee, A chest too broad is not desirable, but a fleshy and a prominent one ; yet even this, perhaps, may require some explanation. When the fore legs appear to recede and to shelter themselves under the body, there is a faulty position of the fore limbs, a bend or standing over, an unnatural lengthmess about the fore parts of the breast, sadly disadvantageous in progression. There is also a posterior appendix to the sternum, which is also cartilaginous. It is called the ensiform cartilage, although it bears little resemblance to a sword. It is flat and flexible, yet strong, and serves as the commencement of the floor or support of the abdomen. It also gives insertion to some of the abdominal muscles, and more conveniently than it could have been obtained from the body of the sternum. The intercostal Muscles. — The borders of the ribs are anteriorly concave, thin and sharp — posteriorly rounded, and presenting underneath a longi- tudinal depression or channel, in which run both blood-vessels and nerves. The space between them is occupied by muscular substance firmly attached to the borders of the ribs. These muscles are singularly distributed ; their fibres cross each other in the form of an X. There is a manifest advantage in this. If the fibres ran straight across from rib to rib, they might act powerfully, but their actions would be exceedingly limited. A short muscle can contract but a little way, and only a slight change of form or dimension can be produced. By running diagonally from rib to rib, these muscles are double the length they could otherwise have been. It is a general rule with regard to muscular action, that the power of the muscle depends on its bulk, and the extent of its action on its length. The ribs, while they protect the important viscera of the thorax from injury, are powerful agents, when acted on by the respiratory muscles, in extending and contracting the chest in the alternate inspiration and expiration of air. In what proportion they discharge the labour of respiration is a disputed question, and into the consideration of which we cannot enter until something is kno^m of the grand respiratory muscle, the diaphragm. Thus far, however, may be said, that they are inactive in. natural respiration, or they certainly act only a secondary part ; but in hurried respii-ation, and when the demand for arteriaHsed blood is increased by violent exertion, they are valuable and powerful auxiharies. This leads to a very important consideration, the most advantageous form of the chest for the proper discharge of the natural or extraordinary functions of the thoracic "\dscera. The contents of the chest are the lungs and the heart : the first, to render the blood nutrient and stimulating, and to give or restore to it that vitaHty which will enable it to support every part of the frame in the discharge of its function, and devoid of which the comphcated and beautiful macliine is inert and dead ; and the second, to convey this purified arteriaHsed blood to every part of the frame. In order to produce and to convey to the various parts a sufficient quantity of blood, these organs must be large. If it amounts not to THE CHEST. 247 h^'perti'opliy, the larger the lieart and the larger the lungs, the more rapid the process of nutrition, and the more perfect the discharge of every animal function. Then it might be imagined that, as a circle is a figure which contains more than any other of equal girth and admeasurement, a circular form of the chest woidd be most advantageous. Not exactly so ; for the contents of the chest are alternately expanding and contracting. The circular chest could not expand, but every change of form would be a diminution of capacity. That form of chest which approaches nearest to a circle, while it admits of sufficient expansion and contraction, is the best — certainly for some animals, and for all under peculiar circumstances, and with reference to the discharge of certain functions. This was the grand principle on which Mr. Bakewell proceeded, and on which all our improvements in the breed- ing of cattle were founded. The principle holds good with regard to some breeds of horses. "We value the hea^'y draught horse not only on account of his simple muscular power, but the weight which, by means of that power, he is able to throw into the collar. A light horse may be preferable for light draught, but we m.ust oppose weight to weight when our loads are heavy. In the dray- horse we prize the circular chest, not only that he may be proportionally hea"vier before — to him. no disadvantage — but that, by means of the in- creased capacity of his chest, he may obtain the bulk and size which best fit him for our service. But he would not do for speed, he would not do for ordinary quick exertion, and if he were pushed far beyond his pace, he would become broken-"s\dnded or have inflamed lungs. Some of our saddle-horses and cobs have barrels round enough, and we value them on account of it, for they are always in condition and they i-arely tire. But when we look at them more carefully, there is just that departure from the circular form of which mention has been made — that happy medium between the circle and the ellipse which retains the C6k- pacity of the one and the expansibility of the other. Such a horse is invaluable for common purposes, but he is seldom a horse of speed. If he is permitted to go his own pace, and that not a slow one, he will work ou for ever ; but if Jie is too much hurried he is soon distressed. The Broad Beep Chest. — Then for the usual purposes of the road, and more particularly for rapid progression, search is made for that form of the chest which shall unite, and to as great a degree as possible, con- siderable capacity in a quiescent state, and the power of increasing that ■capacity when the animal requires it. There must be the broad chest for the production of muscles and sinews, and the deep chest, to give the capacity or power of furnishing arterial blood equal to the most rapid exhaustion of vitality. This form of the chest is consistent -udth lightness, or at least with all the lightness that can be rationally required. The broad-chested horse, or he that, with moderate depth at the girth, swells and barrels out imme- diately behind the elbow, may have as light a forehead and as elevated a wither as the horse with the narrowest chest ; but the animal with the barrel approaching to near to rotundity is invariably heavy about the shoulders and low in the mthers. It is to the mixture of the Arabian blood that we principally owe this peculiar and advantageous formation of ^he chest of the horse. The Arab is light ; some would say too much so before ; but immediately behind the arms the barrel almost invariably swells out, and leaves plenty of room, and where it is most wanted for the play of the lungs, and at the same time where the weight does not press so exclusively on the fore legs, and expose the feet to concussion and injury. 24s THE CHEST. Many horses "\\ntli narrow chests, and a great deal of daylight undei them, have plenty of spirit and willingness for work. They show themselves oif well, and exhibit the address and gratify the vanity of their riders on the parade or in the park, but they have not the appetite nor the endurance that will carry them through three successive days' hard work. Five out of six of the animals that perish from inflamed lungs are nar- row-chested, and it might be safely affirmed that the far greater part O'f those who are lost in the field after a hard day's run, have been horses whose training has been neglected, or who have no room for the lungs to expand. The most important of all points in the conformation of the horse is here elucidated. An elevated wither, or oblique shoulder, or powerful quarters, are great advantages ; but that which is most of all connected with the general health of the animal, and with combined fleetness or bottom, is a deep, and broad, and swelling chest, with sufficient lengthening of the sternum, or breast-bone, beneath. If a chest that cannot expand with the increasing expansion and labour of the lungs is so serious a detriment to the horse, everything that in- terferes with the action of the intercostal muscles is carefully to be avoided. Tight girthing ranks among these, and foremost among them. The close- ness with which the roller is buckled on in the stable must be a serious inconvenience to the horse ; and the partially depriving these muscles of their power of action, for so many hours in every day, must indispose them for labour when quicker and fuller respiration is required. At all events, a tight girth, though an almost necessary nuisance, is a very con- siderable one, when all the exertion of which he is capable is required from the horse. Who has not perceived the address vnth which, by bellying out the chest, the old horse renders every attempt to girth him tight comparatively useless ; and when a horse is blown, what immediate relief has ungirthing him afforded, by permitting the intercostals to act with greater power ? A Tjoint of consequence regarding the capacity of the chest is the length or shortness of the carcase; or the extent of the ribs from the elbow backward. Some horses are what is called ribbed liotne ; there is but little space (see cuts pp. 140 and 244) between the last rib and the hip- bone. In others the distance is considerably greater, and is plainly evident by the falling in of the flank. The question then is, what service is required from the horse ? If he has to carry a heavy weight, and has much work to do, he should be ribbed home — the last rib and the hip- bone should not be far from each other. There is more capacity of chest and of belly, there is less distance between the points of support, and greater strength and endurance. A hackney (and we would almost say a hunter) can scarcely be too well ribbed home. If speed, however, is required, there must be room for the full action of the hinder limbs; and this can only exist where there is sufficient space between the last rib and the hip-bone. The owner of the horse must make up his mind as to what he wants from him, and be satisfied if he obtains that ; for, let him be assured that he cannot have everythiag, for this would require those differences of conformation that cannot possibly exist in the same animal. The thorax, or chest, is formed by the spine/, above (p. 244) ; the ribs e, on either side ; and the stomum, or breast-bone, c, beneath. THE SPINE AND BACK L'CP THE SPINE AND BACK. Tlie spine, or back, consists of a chain of bones from tlie poll to tli^ extremity of the tail. It is made up of twenty-three bones from the neck to the haunch ; eighteen, called dorsal vertehrce, composing the back ; and five, lumbar vertehrce, occupying the loins. On this part of the animal the weight or burden is laid, and there are two things to be principally con- sidered, easiness of carriage and strength. If the back were composed of unyielding materials — if it resembled a bar of wood or iron, such^urring and jolting, in the rapid motion of the animal, could not possibl} be endured. In order to avoid this, as well as to assist in turning, the back is divided into numerous bones ; and between each pair of bones there is interposed a cartilaginous substance, most highly elastic, that will yield and give way to every jar, not so much as to occasion insecurity between the bones, or to permit considerable motion between any one pair, but forming altoo-ether an aggregate mass of such perfect elasticity that the rider sits almost undisturbed, however high may be the action or however rapid the pace. Strength is as important as ease ; therefore the bones are united together with peculiar firmness. The round head of one is exactly fitted to the cup or cavity of that immediately before it ; and between them i= placed the elastic ligamentous substance which has been just described, so strong, that in endeavouring to separate the bones of the back they will break before this substance will give way. In addition to this there are ligaments running along the broad under-surface of these bones — ligaments between each of the transverse processes, or side projections of the bones — ligaments between the spinoiis processes or upright projections,. and also a continuation of the strong ligament of the neck running alono- the whole course of the back and loins, lengthening and contracting, as in the neck, with the motions of the animal, and forming a powerful bond of union between the bones. By these means the hunter will carry a heavy man without fatione or strain through a long chase ; and those shocks and jars are avoided which would be annoying to the rider and injurious and speedily fatal to the horse. These provisions, however, although adequate to common or even severe exertion, will not protect the animal from the consequences of brutal usao-e • and, therefore, if the horse is much overweighted, or violently exercised or too suddenly pulled upon his haunches, these ligaments are strained. Inflammation follows. The ligaments become changed to bone, and the joints of the back lose their springiness and ease of motion ; or rather in point of fact, they cease to exist. On account of the too hard service re- quired from them, and especially before they had gained their full sti^eno-th there are few old horses who have not some of the bones of the back or loins anchylosed — united together by bony matter and not by ligament. When this exists to any considerable extent the horse is not pleasant tO' ride ; he turns with di£B.culty in his stall, he is un-\villing to lie down, and when down to rise again, and he has a singular straddhng action. Such horses are said to be broken-hacked or chinked in the back. The length of the back is an important consideration. A long- backed horse will be easy in his paces, because the increased distance between the fore and hind legs, which are the supports of the spine, will afibrd greater room for the play of the joints of the back. A long spring has much more play than a short one, and will better obviate concussion. A long-backed horse is likewise formed for speed, for there is room to bring his hinder leo-s more under him in the act of galloping, and thus more powerfully propel 25C THE LOINS. — THE WITHERS. or drive forward tlie body ; but, on the other hand, a long-backed horse will be comparatively weak in the back, and easily overweighted. A long spring may be easily bent or broken. The weight of the rider, likewise, placed farther from the extremities, will act with mechanical disadvantage upon them, and be more likely to strain them. A short-backed horse may be a good hackney, and able to carry the heaviest weight, and possess more endurance ; but his paces will not be so easy, nor his speed so great, and he may be apt to overreach. The comparative advantage of a long or short carcase depends entirely on the use for which the horse is intended. For general purposes the horse with a short carcase is very properly preferred. He will possess health and strength ; for horses of this make are proverbially hardy. He will have sufficient easiness of action not to fatigue the rider, and speed for every ordinary purpose. Length of back will always be desirable when there is more than usual substance generally, and particulaj-ly when the loins are wide and the muscles of the loins large and swelling. The two requisites, strength and speed, will then probably be united. The back should be depressed a little immediately behind the withers ; and then continue in an almost straight line to the loins. This is the form most consistent with beauty and strength. Some horses have a very con- siderable hollow behind the withers. They are said to be saddle-backed. It seems as if a depression were purposely made for the saddle. Such horses are evidently easy goers, for tliis curve inward must necessarily increase the play of the joints of the back ; but in the same proportion they are weak and liable to sprain. To the general appearance of the horse, this defect is not in any great degree injui-ious ; for the hollow of the back is uniformly accompanied by a beautifully arched crest. A few horses have the curve outward. They are said to be roach-hacked, from the supposed resemblance to the arched back of the roach. This is a very serious defect ; altogether incompatible \ni\\ beauty, and materially diminishing the usefulness of the animal. It is almost impossible to pre- vent the saddle from being thrown on the shoulders, or the back from being galled ; the elasticity of the spine is destroyed ; the rump is badly set on ; the hinder legs are too much under the animal ; he is continually overreaching, and his head is carried awkwardly low, THE LOINS. The loins are attentively examined by every good horseman. They can scarcely be too broad and muscular. The strength of the back, and, espe- cially, the strength of the hinder extremities, will depend materially on this. The breadth of the loins is regulated by the length of the transverse or side processes of that part. The bodies of the bones of the loins are likewise larger than those of the back ; and a more dove-tailed kind of union subsists between these bones than between those of the back. Every provision is made for strength here. The union of the back and loins should be carefully observed, for there is sometimes a depression between them. A kind of line is drawn across, which shows imperfection in the construction of the sjjine, and is regarded as an indication of weakness, THE WITHERS, The spinous or upright processes of the dorsal vertebraj, or bones of the back, above the upper part of the shoulder, are as remarkable for their length as are the transverse or side processes of the bones of the loins. They are flattened and terminated by rough blunted extremities. The elevated ridge which they form is called the withers. It will be seen in the cuts (pp. 140 and 244), that the spine of the first bone of the back has MUSCLES OF THE BREAST. 23 1 but little elevation and is sharp and upright. The second is longer and inclined backward ; the third and fourth increase in length, and the fifth is the hmgest ; they then gradually shorten until the twelfth or thirteenth, which becomes level with the bones of the loins. High withers have been always, in the mind of the judge of the horse, associated with good action, and generally with speed. The reason is plain enough : they afford larger surface for the attachment of the mus cles of the back ; and in proportion to the elevation of the withers, theso muscles act with greater advantage. The rising of the foreparts of the horse, even in the trot, and more especially in the gallop, depends not merely on the action of the muscles of the legs and shoulders, but on those of the loins, inserted into the spinous processes of these bones of the back, and acting with greater power in proportion as these processes, consti- tuting the withers, are lengthened. The arm of the lever to which the power is apphed will be longer ; and in proportion to the length of this arm will be the ease and the height to which a weight is raised. There- fore good and high action will depend much on elevated withers. It is not difficult to understand how speed will likewise be promoted by the same conformation. The power of the horse is in his hinder-quarters. In them lies the mainspring of the frame, and the fore-quarters are chiefly elevated and thrown forward to receive the weight forced on them by the action of the hinder-quarters. In proportion, however, as the fore-quarters are elevated, will they be thrown farther forward, or, in other words, will the stride of the horse be lengthened. Yet many racers have the forehand low. The unrivalled Eclipse (see p. 69) was a remarkable instance of this ; but the ample and finely- proportioned quarters, and the muscularity of the thigh and fore-arm, rendered the aid to be derived from the withers per- fectly unnecessary. The heavy draught-horse does not require elevated withers. His utility depends on the power of depressing his fore- quarters, and throwing their weight fully into the collar ; but for common work in the hackney, in the farmer's horse, and in the hunter, well-formed withers will be an essential advantage, as contributing to good and safe action, and likewise to speed. MUSCLES OP THE BREAST. There are some important muscles attached to the breast connected with that expansion of the chest which every horse should possess. In the cut, page 237, are seen a very important pair of muscles, the pedorales trans- versi, or pectoral muscles, forming two prominences in the front of the chest, and extending backward between the legs. They come from the fore and upper part of the breast-bone ; pass across the inward part of the arm, and reach from the elbow almost down to the knee. They confine the arm to the side in the rapid motion of the horse, and prevent him from being, what horsemen would call, and what is seen in a horse pushed beyond his natural power, 'all abroad.' Other muscles, pec^oraZes magni et parvi, the great and little pectorals, rather above but behind these, go from the breast-bone to the arm, in order to draw back the point of the shoulder, and bring it upright. Another and smaller muscle goes from the breast-bone to the shoulder, to assist in the same office. A horse, there- fore, thin and narrow in the breast, must be deficient in. important muscular power. Between the legs and along the breast-bone ia the proper place in which to insert rowels, in cases of inflamed lungs. "■^2 MUSCLES OP THE BACK. FISTULOUS WITHERS. MUSCLES OF THE BACK. Tlie most important muscles which belong to this part of the frame ai*e principally those which extend from the continuation of the ligament of the neck, along the Avhole of the back and loins ; and Hkewise from the last cervical bone ; — the superficialis and transversalis costarum, or super- ficial and transverse muscles of the ribs, going from this ligament to the upper part of the ■^ibs to elevate them, and to assist in the expansion of the chest ; also the large mass of muscle, the longissvmv^ dorsi, or longest muscle of the back, from the spinous and transverse processes of the ver- tebriB to the ribs, and by which all the motions of the spine, and back, and loins, to which allusion has been made, are principally produced ; by wliich the fore-quarters are raised upon the hind ones, or the hind upon the fore ones, according as either of them is the fixed point. This is the principal agent in rearing and kicking. The last muscle to be noticed is the spinalis dorsi, the spinal muscle of the back, from the spinous processes of some of the last bones of the back to those of the fore-part ; thick and strong about the withers, and broadly attached to them ; and more powerfully attached, and more strongly acting, in proportion to the elevation of the withers ; and proceeding on to the three lowest bones of the neck, and therefore mainly concerned, as already described, in elevating the fore- quarters, and producing high and safe action, and contributing to speed. FISTULOUS "WITHERS. When the saddle has been sufiered to press long upon the withers, a tumour will be formed, hot and exceedingly tender. It may sometimes be dispersed by the cooling applications recommended in the treatment of poll-evil ; but if, in despite of these, the swelling should remain stationary, and especially if it should become larger and more tender, warm fomen- tations and poultices, and stimulating embrocations, should be diligently applied, in order to hasten the formation of pus. As soon as that can be fairly detected, a seton should be passed from the top to the bottom of the tumour, so that the whole of the matter may be evacuated, and continued to be discharged as it is afterwards formed ; or the knife may be freely used, in order to get at the bottom of every sinus. The knife has suc- ceeded many a time when the seton has failed. The after treatment must be precisely that which was recommended for a similar disease in the poll. In neglected fistulous withers the ulcer may be larger and deeper, and more destructive than in poll-evil. It may burrow beneath the shoulder- blade, and the pus appear at the point of the shoulder or the elbow ; or the bones of the withers may become carious. Very great improvement has taken place in the construction of saddleb for common use and in the cavalry service. Certain rules have now been laid down from which the saddler should never deviate, and attending to which the animal is saved from much sufiering, and the mechanic from deserved disgrace. The first rule in the fitting of a saddle is, that it should bear upon the back, and not on the spine or the withers, for these are parts that will not (indure pressure. Next in universal application is the understanding that the saddle should have everywhere an equal bearing, neither tilting forward upon the points nor backward upon the seat. "When the saddle is on, and the girths fastened, there should remain space Bufficient between the withers and the pommel for the introduction of the hand underneath the latter. SITFASTS, AND SADDLE GALLS. 2'i3 The points of the tree should clip or embrace the sides without pinching them, or so standing outward that the pressure is all downwards, and upon one place, instead of being in a direction inwards as well as do^vnwards, so as to be distributed uniformly over every part of the point that touches the side. Horses that have low and thick withers are most likely to have them injured, in consequence of the continual riding forward of the saddle, and its consequent pressure upon them. Fleshy and fat shoulders and sides are also subject to become hurt by the points of the trees either pinching them from being too narrow in the arch, or from the bearing being directly downward upon them. Injury occasionally results from the intemiption which a too forward saddle presents to the working or motion of the shoulder, and the conse- quent friction the soft parts sustain between the shoulder-blade inwardly and the points of the saddle-tree outwardly. SITFASTS, AND SADDLE GALLS. On other parts of the back tumours and very troublesome ulcers may be produced by the same cause. Those resulting from the pressure of the saddle are called saddle galls, and, when they ulcerate, they frequently become sitfasts. Saddle galls are small circular bruises, or extravasations of blood, where there has been an undue pressui-e of the saddle or harness. If a horse is subject to these tumours, the saddle should remain on him two or three hours after he has returned to the stable. It is only for a certain time, however, that this will perfectly succeed, for by the frequent application of the pressure the skin and the cellular substance are bruised or otherwise injured, and a permanent sore or tumoui-, of a very annoying description, takes place. The centre of the sore gradually loses its vitality. A separation takes place from the surrounding integument, and there is a circular piece of dried and hard skin remaining in the centre ; by removing this with the knife, more is done in a few minutes than days will effect in the old routine of poulticing and blistering ; and the wound wiU readily heal by the use of turpentine dressings, more or less stimulating, according to circumstances. With regard, however, to all these tumours and excoriations, the humane man "vvill have the saddle eased and padded as soon as it begins to be of the least inconvenience to the horse. DROPSY OP THE SKIN OP THE CHEST. Dropsical swellings often appear between the fore legs and on the chest. They are eflfusions of fluid underneath the skin. They accompany various diseases, particularly when the animal is Aveakened by them, and sometimes appear when there is no other disease than the debility, which, in the spring and faU of the year, accompanies the changing of the coat. The treatment will vary with the cause of the affection or the accompanying disease. Small punctures mth the lancet vnW seldom do harm ; friction of the part, if it can be borne, will be serviceable ; mild exercise should be used; diuretics given, mixed with some cordial, as carrots, malt mashes, and occasionally a very mild dose of physic, and that followed by tonics and cordials, with diuretics. The vegetable tonics, as gentian and columbo with ginger, will be most effectaal. 254 A.YATOMT AND DISEASE OF THE RESPIRATORY ORGANS. * CHAPTER XIII. THE ANATOMY AND DISEASES OF THE RESPIRATORY ORGANS. Having in tlie previous chapter given a brief outline of tlie external formation of the chest, and surrounding parts, we now proceed to a de- scription of its contents, and the organs directly connected with the func- tions of respiration. THE DIAPHRAGM. Bounding the thorax posteriorly — the base of the cone in the human subject — the interposed curtain between the thorax and the abdomen in the horse, is the diaphragm. It is an irregular muscular expansion, pro- ceeding from the inferior surface of the lumbar vertebrjB posteriorly and superiorly, adhering to the ribs and cartilages on either side, and extending obhquely forward and downward to the sternum ; or, rather it is a flattened muscle arising from all these points, with its fibres all converging towards the centre, and terminating there in an expansion of tendinous substance. It is Hned anteriorly by the pleura or investing membrane of the thoracic cavity, and posteriorly by the peritoneum or investing membrane of the abdominal cavity. Anatomy of the Diaphragm. — In the short account which it is proposed to give of the structure of the diaphragm, the description of Mr. Per- civall will be closely followed. ' The diaphragm may be divided into the main circular muscle, with its central tendinous expansion forming the lower part, and two appendices^ or crura, as they are called, from their peculiar shape, constituting its superior portion. The fleshy origin of the grand muscle may be traced laterally and inferiorly, commencing from the cartilage of the eighth rib anteriorly, and closely following the imion of the posterior ribs with their cartilages ; excepting, however, the two last. The attachment is peculiarly strong; it digitates with the transverse muscle of the abdomen, and encircles the whole of the lateral and inferior part of the chest, as far as the sternum, where it is connected with the ensi- form cartilgae. Immediately under the loins are the appendices of the diaphragm, commencing on the right side, from the inferior surfaces of the five lumbar vertebrse, by strong tendons, which soon become muscular, and form a kind of pillar ; and on the left, proceeding from the two first lumbar vertebrae only, and from the sides rather than the bodies of these vertebrae, and these also unite and form a shorter pillar, or leg. The left crus, or appendix, is shorter than the right, that it may be more out of the way of pressure from the left curvature of the stomach, which, with the spleen, lies underneath. Opposite to the seventeenth dorsal vertebrae these two pillars unite and form a thick mass of muscles, detached from the vertebrae, and leaving a kind of pouch between them and the vertebrae. They not only unite, but they decussate; their fibres mingle and again separate from each other, and then proceed onward to the central tendinous expansion towards which the fibres from the circular muscle, and the appendices, all converge.' This muscle, so important in its office, is plentifolly supplied with blood- ressels. As the posterior aorta passes beneath the crura of the diaphragm, it gives out sometimes a single vessel which soon bifurcates ; sometimes two branches, which speedily plunge into the appendices or crura, while numerous small vessels, escaping from them, spread over the central tendi- nous expansion. As the larger muscle of the diaphragm springs from the Hides and the base of the chest, it receives many ramifications from the THE DIAPHRAGM. 256 intornal pectoral, derived from the anterior aorta ; but more from the pos- terior intercostals -wliicli spring fi-om the posterior aorta. The veins of the diapliragm belong exclusively to the posterior vena cava. There are usually three on either side ; but they may be best referred to two chief trunks which come from the circumference of the diaphragm, converge towards the centre, and run into the posterior cava as it passes through the tendinous expansion. The functional nerve of the diaphragm, or that from which it derives its principal action, and which constitutes it a muscle of respiration, is the phrenic or diaphragmatic. Although it does not proceed from that portion of the medulla oblongata which gives rise to the glosso-pharyngeus and the par vagum, yet there is sufficient to induce us to suspect that it arises from, and should be referred to, the lateral column between the superior and in- ferior, the sensitive and motor nerves, and which may be evidently traced from the pons varolii to the very termination of the spinal chord. The diaphragm is the main agent in the work of respiration. The other muscles are mere auxiliaries, little needed in ordinary breatliing, but afford- ing the most important assistance, when the breathing is more than usually hurried. The mechanism of respiration may be thus explained : — Let it be supposed that the lungs are in a quiescent state. The act of expiration has been performed, and all is still. From some cause enveloped in mys- tery— connected with the will, but independent of it — some stimulus of an unexplained and unknown kind — the phrenic nerve acts on the diaphragm, and that muscle contracts ; and, by contracting, its convexity into the chest is diminished, and the cavity of the chest is enlarged. At the same time, and by some consentaneous influence, the intercostal muscles act ; with no great force, indeed, in undisturbed breathing ; but, in proportion as they act, the ribs rotate on their axes, their edges are thrown outward, and thus a twofold effect ensues ; the posterior margin of the chest is expanded, the cavity is plainly enlarged, and also, by the partial rotation of every rib, the cavity is still more increased. By some other consentaneous influence, the spinal accessory nerve like- wise exerts its power, and the sterno-maxillaris muscle is stimulated by the anterior division of it, and the motion of the head and neck corresponds with and assists that of the chest ; while the posterior division of the ac- cessory nerve, by its anastomoses with the motor nerves of the levator humeri and the splenius, and many other of the muscles of the neck and the shoulder, and by its direct influence on the rhomboideus, associates almost every muscle of the neck, the shoulder, and the chest, in the expan- sion of the thorax. These latter are muscles which, in undisturbed respi- ration, the animal scarcely needs ; biit which are necessary to him when the respiration is much disturbed, and to obtain the aid of which he will, under pneumonia, obstinately stand until he falls exhausted or to die. The cavity of the chest is now enlarged. But this is a closed cavity, and between its contents and the parietes of the chest a vacuum would be formed; or rather an inequality of atmospheric pressure is produced from the moment the chest begins to dilate. As the diaphragm recedes, there is nothing to counterbalance the pressure of the atmospheric air com- municating with the lungs through the medium of the nostrils, and it is forced into the respiratory tubes already described, and the lungs are expanded and still kept in contact with the receding walls of the chest. There is no sucking, no inhalent power in the act of inspiration ; it is the simple enlargement of the chest from the entrance and pressure of the air. From some cause, as inexplicable as that which produced the expansion of the chest, the respiratory nerves cease to act ; and the diaphragm, by the inherent elasticity of its tendinous expansion and muscular fibres, re- 2S6 THE MEMBRANE OF THE NOSE. turns to its natural form, once more projecting its convexity into the thorax. The abdominal muscles, also, -which had been put on the stretch by the forcing of the viscera into the posterior part of the abdomen, by means of the straightening of the diaphragm, contract and accelerate the return of that muscle to its quiescent figui-e ; and the ribs, all armed with elastic cartilages, regain their former situation and figure. The muscles of the shoulder and the chest relax, a portion of the lungs are pressed on every side, and the air with which they were distended is again forced out. There is only one set of muscles actively employed in expii-ation, namely, the ab- dominal ; the elasticity of the parts displaced in inspiration being almost sufficient to accomplish the purpose. The lungs, however, are not altogether passive. The bronchial tubes, so far as they can be traced, are lined with cartilage, divided and subdi- vided for the purpose of folding up when the lungs are compressed, but elastic enough to afford a yielding resistance against both unusual expan- sion and contraction. In their usual state the air-tubes are distended beyond their natural calibre ; for if the parietes of the thorax are per- forated, and the pressure of the atmosphere rendered equal within and without them, the lungs immediately collapse. THE MEMBRANE OP THE NOSE. The mucous membrane of the nose is distinguished from other mucous surfaces, not only by its thickness, but its vascularity. The blood-vessels are likewise superficial ; they are not covered even by integument, but merely by a mucous coat. They are deeper seated, indeed, than in the human being, and they are more protected from injury ; and therefore there is far less hcemorrhage from the nostril of the horse than from that of the human being, whether spontaneous or accidental. Lying immediately under the mucous coat, these vessels give a peculiar, and, to the horseman, a most important tinge to the membrane, and particularly observable on the septum. They present him with a faithful indication of the state of the circulation, and especially in the membranes of the other respiratory passages with which this is continuous. The horseman and the veterinary surgeon do not possess many of the auxiharies of the human practitioner. Their patients are dumb ; they can neither tell the seat nor the degree of pain ; and the blunders of the practitioner are frequently buried with the patient. Well, he must use greater dihgence in availing himself of the advantages he does possess ; and he has some, and very important ones too. The varying hue of the Schneiderian membrane is the most important of all ; and, with regard to the most frequent and fatal diseases of the horse — those of the respiratory passages — it gives almost all the information with regard to the state of the cii-culation in those parts that can possibly be required. Veterinarians too generally overlook this. It has not yet been sufficiently taught in our ■schools, or inculcated in our best works on the pathology of the horse. It is the custom with almost every horseman who takes any pains to Ascertain the state of his patient to turn down the lower eye-lid, and to form his opinion of the degree of general inflammatiim by the colour which the Hning membrane of the lid presents. If it is very red, he con- cludes that there is considerable fever ; if it is of a pale pinkish hue, there is comparatively little danger. This is a very important examination, and the conclusion which he draws from it is generally true; but on the sep- tum of the nose he has a membrane more immediately continuous witli those of the respiratory organs, more easily got at, presenting a larger surface, the ramifications of the blood-vessels better seen, and what is truly important, indicating not only the general aflection of the membranes, but of those with which he is most of all concenied. THE LARYNX. 267 We would, then, say to every horaeman and practitioner, study the cliaracter of that portion of the membrane -which covers the lower part of the membrane of the nose — that which you can most readily bring into view. Day after day, and under all the varying circumstances of health and disease, study it until you are enabled to recognise, and you soon will, and that with a degree of exactitude you would have scarcely thought possible, the pale pink hue when the horse is in health — the increasing blush of red, and the general and uniform painting of the membrane, betokening some excitement of the system — the streaked appearance when inflammation is threatening or commencing — the intensely florid red of inflammation becoming acute — the starting of the vessels from their gossamer coat, and their seeming to run bare over the membrane, when the inflammation is at the highest — the pale ground with patches of vivid red, showing the half-subdued but still existing fever — the uniform colour, but somewhat redder tlian natui-al, indicating a return to a healthy state of the circulation — the paleness approaching to white, accompanying a state of debihty, and yet some radiations of crimson, showing that there is still considerable irritabihty, and that mischief may be in the Avind — the pale livid colour, warning you that the disease is assuming a typhoid character — the darker livid, announcing that the t}^hus is established, and that the vital current is stagnating — and the browner, dirty painting, inter- minorling with and subduing the Hvidness, and indicating that the game is up. These appearances will be guides to our opinion and treatment,, which we can never too highly appreciate. THE LARYNX Is placed on the top of the windpipe, immediately below and in contact' with the pharynx, and is the inner guard of the lungs if any injurious substance should penetrate so far : it is the main protection against the passage of food into the respiratory tubes, and it is at the same time the instrument of voice. In this last character it loses much of its importance in the quadruped, but still in the dumb animal it is a beautifal piece of mechanism. The Epiglottis is a heart-shaped cartilage, placed at the superior opening into the laryn:s, with its back opposed to the pharynx, so that when a pellet of food passes from the pharynx in its.way to the oesophagus, it presses down the epiglottis, and by this means, as already described, closes the aperture of the larynx, and prevents any portion of the food from entering it. The food having passed over the epiglottis, it, from its • own elasticity, and that of the membrane at its base, and more par- ticularly the power of the hyo-epiglotideus muscle, rises again and resumes- its former situation. The Thtroid Cartilage occupies almost the whole of the external part of the larynx, both anteriorly and laterally. It envelopes and protect* all the rest ; a point of considerable importance, considering the injury to wliich the larynx is exposed, by our system of curbing and tight-rein- ing. It also forms a point of attachment for the insertion of the greater part of the delicate muscles by which the other cartilages are moved. The other cai-tilages are the cricoid and two arytenoid. The cricoid, or ring- like cartilage, is placed at the base of the thyroid, connecting it with the trachea or windpipe : the two arytenoid, or ewer-shaped cartilages, form the upper and back part of the larynx, as the thjToid does the upper front and lateral portion. It is principally supplied with nerves by the larjTigeal branches of the par vagum and the recurrent nerves ; and there are also frequent anastomoses with the motor nerves of the spinal cord. The beautifal mechanism of the larynx is governed or worked by a S 258 THE TRACKEA, OR WINDPIPE. somewliat complicated system, of muscles, for a description of wliich the reader is referred to the 5th vol. of ' The Veterinariau,' p. 447. The entire process of respii-ation is partly under the control of the will, and the muscles of the larynx concerned in one stage of it are likewise so, but they also act independently of the will, for during sleep and unconsciousness the machine continues to work. The origin of the artery which supplies these parts with blood is some- times derived from the main trunk of the carotid, but oftener it is a branch of the thyroideal artery. The lining membrane is a continuation of that of the pharynx above and the trachea below. It is covered with innumerable follicular glands, from whose mouths there oozes a mucous fluid that moistens and lubricates its surface. It is possessed of very great sensibility, which is derived from the superior laryngeal nerve, and its function requires it. It is, as has been already stated, the inner guard of the lungs, and the larynx must undergo a multitude of changes of form in order to adapt itself to certain chano-es in the act of respiration, and in order to produce the voice. The voice of the horse is, however, extremely limited, compared with that of the human being ; the same sensibility, therefore, is not required, and exposed as our quadruped slaves are to absurd and barbarous usage, too great sensibility of any part, and particularly of this, would be a curse to the animal. THE TKACHEA, OR WINDPIPE. The course of the inspired air from the larynx to the lungs is now to be traced, and it will be found to be conveyed through a singularly con- structed tube, passing along the anterior portion of the neck, and reaching from the lower edge of the cricoid cartilage to the lungs. In the com- mencement of its course it is somewhat superficially placed, but as it descends towards the thorax it becomes gradually deeper, and more con- cealed. In order to discharge its functions as an air-tube, it is essential that it should always be pervious, or, at least, that any obstruction to the process of respiration should be but momentary. Attached to a part endowed with such extensi^^e motion as the neck, it is also necessary that it should be flexible. It is composed of cartilage, an exceedingly elastic substance, and at the 'same time possessing a certain degree of flexibihty. The windpipe is composed of cartilage, but not of one entire piece, for that would necessarily be either too thick and firm to be flexible, or if it were sufficiently flexible to accommodate itself to the action of the neck, it would be too weak to resist even common pressure or injury, and the passage through it would often be inconveniently or dangerously ob- structed. Besides, it is necessary that this tube should occasionally admit of elongation to a considerable degree. When the neck is extended in the act of grazing or otherwise, the trachea must be leng-thened. The structure of the cartilage of the ^vindpipe is admirably adapted to efiect every purpose. It is divided into rings, fifty or fifty-two in number, each possessing sufficient thickness and strength to resist ordinary pressure, and each constituting a junction with the one above and below, and thus admitting of all the flexibihty that could be required. These rings are connected together by an interposed fibro- ligamentous substance, exten- sible, elastic, and yet so strong that it is scarcely possible to rupture it ; and the fibres of that ligament not running vertically from one to another, and therefore admitting of little more motion than the rotation of the head, but composed of two layers ruiming obliquely, and in contrary directions, 60 as to adapt themselves to every variety of motion. These rings are tliickest in front, and project cii-cularly, opposing an THE TRACHEA, OR WINDPIPE. 259 arcUike form. There, too, the ligament is ^videst, in order to admit of the greatest motion in the direction in which it is most needed, when the head is elevated or depressed. Laterally these rings are thinner, because they are, to a great degi'ee, protected by the surrounding parts ; and, posteriorly, they overlap each other, and the overlapping portions are con- nected together by a strong hgamentous substance. This, while it does not impede the motion of the tube, gives firmness and stability to it. Within the trachea is another very curious structure. At the points at which, posteriorly, the rings begin to bend inwardly, a muscle is found stretching across the -windpipe, dividing the canal into two unequal por- tions— the anterior one constituting the proper air-passage, and the posterior one occupied by cellular texture. It is to give additional strength to parts. It is the tie which prevents the arch from spurring out. In the natural state of the windpipe this muscle is, probably, quiescent ; but when any considerable pressure is made on the crown of the arch at the upper part by tight-reining, or at the lower end by an ill-made collar, or anywhere by brutal or accidental violence, this muscle contracts, every serious expansion or depression of the arch is prevented, and the part is preserved from serious injury. It may also be readily imagined that, when in violent exertion, every part of the respiratory canal is on the stretch, this band may preserve the windpipe from injury or laceration. There are many beautiful points in the physiology of the horse which deserve much greater attention than has hitherto been paid to them. The windpipe should project from the neck. It should almost seem as if it were detached from the neck, for two important reasons : first, that it may easily enter between the channels of the jaw, so that the horse may be reined up without suffering inconvenience ; and next, that being more loosely attached to the neck, it may more readily adapt itself to the changes required than if it were enveloped by fat, or muscle to a certain degree unyielding : therefore, in every well-formed neck — and it wiU be seen in the cut (p. 237) — it is indispensable that the windpipe should be prominent and loose on the neck. This is not required in the heavy cart-horse, and we do not often find it, because he is not so much exposed to those cir- cumstances that will hurry respiration, and require an enlargement in the size of the principal air- tube. When the trachea arrives at the thorax, it suddenly alters its form, in order to adapt itself to the narrow triang-ular aperture through which it has to pass. It preserves the same cartilaginous structure ; for if it has not the pressure of the external muscles, or of accidental violence, to resist, it is exposed to the pressure of the lungs, when they are inflating, and it shares in the pressure of the diaphragm, and of the intercostal muscles, in the act of expiration. Having entered the chest, it passes a little to the right, leaving the oesophagus, or gullet, on the left ; it separates from the dorsal vertebra ; it passes through the dupHcature of the mediastinum to the base of the heart, and it divides beneath the posterior aorta. Its divi- sions are called the bronchial tubes, and have much to do with the well- being of the horse. Its rings remain as perfect as before, but a new portion of cartilage begins to present itself : it may be traced as high as the tenth ring from the bottom ; it spreads over the union between the posterior terminations of the rings ; it holds them in closer and firmer connection with each other ; it discharges the duty of the transverse muscle, which begins here to dis- appear, and the support of the cervical and dorsal vertebrae ; it prevents the separation of the rings when the trachea is distended ; it spreads down upon, and defends the commencement of the bronchial tubes. Some other 8 2 2«» THE BRONCHIAL TUBES.— THE LUNGS. Bmall plates of cartilage reach a considerable way down the divisions o{ the bronchi, and the last ring has a central triangular projection, which covers and defends the bifurcation of the trachea. THE BRONCHIAL TUBES. The windpipe has been traced through its course down the neck into the chest. It is there continued through the mediastinum to the base o-f the heart, and then divided into two tubes corresponding with the two divisions of the lungs — the Bronchial Tubes — the right of which is rathev the largest. These trunks enter deeply into the substance of the lungs. They presently subdivide, and the subdivision is continued in eveiy direc- tion, until branches from the trachea penetrate every assignable portion and part of the lungs. They are still air-passages, carrying on this fluid to its destination, for the accomplishment of a vital purpose. They also continue exposed to pressure ; but it is pressure of a new kind, a pressure alternately supplied and removed. The lungs in which they are embedded alternately contract and expand ; and these tubes must contract and expand likewise. Embedded in the lungs, the cartilaginous ring of the bronchi remains, but it is divided into five or six segments con- nected with each other. The lungs being compressed, the segments over- lap each other, and fold up and occupy little space ; but the principle of elasticity is still at work ; and as the pressure is removed, they start again, and resume their previous form and calibre. It is a beautiful contrivance, and exquisitely adapted to the situation in which these tubes are placed, and the functions they have to discharge, THE LUNGS. The lungs are the seat of a peculiar circulation. They convey through their comparatively small bulk the blood, and other fluids scarcely trans- formed into blood, or soon separated from it, which traverse the whole of the frame. They consist of countless ramifications of air-tubes and blood-vessels connected together by intervening cellular substance. They form two distinct bodies, the right somewhat larger than the left, and are divided from each other by the duplicature of the pleura, which has been already described — the mediastinum. Bach lung has the same structure, and properties, and uses. Each of them is subdivided, the right lobe consisting of three lobes, and the left of two. The intention of these divisions is probably to adapt the substance of the lungs to the form of the cavity in which they are placed, and to enable them more perfectly to occupy and fill the chest. If one of these lobes is cut into, it is found to consist of innumerable irregularly formed compartments, to which anatomists have given the name of lohiles, or little lobes. They are distinct from each other, and impervious. On close examination, they can be subdivided almost without end. There is no communication between them, or if pei-chance such communication exists, it constitutes the disease knovra hj the name of hrohen wind. On the delicate membrane of which these cells are composed, innumer- able minute blood-vessels ramify. They proceed from the heart, through the medium of the pulmonary artery — they follow all the subdivisions of the bronchial tubes — they ramify upon the membrane of these multitu- dinous lobules, and at length return to the heart, tlvrough the medium of the pulmonary veins, the blood, the character of which has been essentially changed. The ofiice of the lungs may be very shortly stated. The blood passing through tlie capillaries of the body and contributing to the nourishment of the frame, and furnishing all the secretions, becomes, as niE PLEURA. abl we have described, changed. It is no longer able to support life : it ia possessed of a poisonous principle, and that principle is a superabundance of a substance called carbon, which must be got rid of, before the blood can again be usefully employed. There is an ingredient in the atmospheric air called oxygen, which has a strong attraction for this carbon, and Avhich will unite v/ith it wherever it iinds it. The chest enlarges by the action of the diaphragm, and the intercostal and other muscles, as we have narrated, and the lungs expanding with the chest, in order to fill up the vacuum which would otherwise exist between them and the sides of the chest, these cells enlarge, and a kind of vacuum is formed in each of them, and the air rushes down and fills them, and being divided from the venous and poisoned blood by these membranes alone, it is enabled to act upon the blood, the oxygen combines with the carbon to form carbonic acid, and thus pui-ifies it, and renders it arterial blood, and fit for the purposes* of life. This being accomplished, the chest contracts, the lungs are pressed into smaller compass, and a portion of the air impregnated with carbonic acid, and rendered poisonous in its turn, is pressed out. Presently the chest expands again, and the lungs expand with it, and fresh, pm-e air is admitted, which is shortly pressed out again, empoisoned by the carbon of the blood : and these alternate expansions and contractions constitute the act of breathing. THE PLEUEA. The walls of the chest are lined, and the lungs are covered, by a smooth glistening membrane, the pleura. It is a seroi.is membrane, so called from the nature of its exhalation, in distinction from the mucous secretion yielded by the membrane of the air-passages. The serous membrane generally invests the most important organs, and always those that are essentially connected with Hfe, and lines all the enclosed cavities of the body ; while the mucous membrane lines the interior of those cavities which have external openings. The pleura is the investing membrane of the lungs, and a mucous membrane the lining one of the bronchial tubes. Among the circumstances principally to be noticed, with regard to the pleura, is the poKsh of its internal surface. The glistening appearance of the lungs, and of the inside of the chest, is to be attributed to the membrane by which they are covered, and by means of which the motion of the various organs is freer and less dangerous. Although the lungs, and the bony walls which contain them, are in constant approximation with each other, both in expiration and inspiration, yet in the frequently hurried and violent motion of the animal, and, in fact, in every act of expiration and inspiration, of dilatation and contraction, much and injui-ious friction would ensue if the surfaces did not gHde freely over each other by means of the pecuHar polish of this membrane. Every serous membrane has innumerable exhalent vessels upon its sxtrface, from which a certain quantity of fluid is poui'ed out. In Hfe and during health it exists in the chest only as a kind of dew, just sufficient to lubricate the surfaces. When the chest is opened soon after death, we recognise it in the steam that arises, and in the few drops of fluid, which, being condensed, are found at the lowest part of the chest. The quantity, however, which is exhaled from all the serous membranes must be very great. It is perhaps equal or superior to that which is yielded by the vessels on the surface of the body. K very Httle is found in ordinary cases, it is because the absorbents are as numerous and as active as the exhalents, and, during health, that which is poured out by the one is taken up by the other ; but in circumstances of disease, either when the exhalents are stimulated to undue action, or the power of the •262 THE PLEURA. absorbents is diminished, the fluid rapidly and greatly accunmlates. T'hns we have hydrothorax or dropsy of the chest, as one of the consequences of inflammation of the chest ; and the same disturbed balance of action will produce similar effusion in other cavities. The adaptation of membrane generally is nowhere more strikingly dis- played than in the serous membranes, and particularly in that under con- sideration. How different the bulk of the lungs before the act of inspira- tion has commenced, and after it has been completed, and especially in the laborious respiration of disease or rapid exertion ! In either state of the lungs the pleiira is perfectly fitted to that which it envelopes. The pleura, like other serous membranes, is possessed of very little sensibility. Few nerves from the sensitive column of the spinal cord reach it. Acute feeling would render these membranes generally, and this membrane in particular, unfit for the function they have to discharge. It has too much motion, even during sleep ; and far too forcible friction with the parietes of the thorax in morbid or hurried respiration, to render it convenient or useful for it to possess much sensation. Some of those anatomists, whose experiments on the living animal do no credit to their humanity, have given most singular proof of the insensibility, not only of these serous membranes, but of the organs which they invest. Bichat frequently examined the spleen of dogs. He detached it from some of its adhesions, and left it protruding from the wound in the abdomen, in order ' to study the phenomena ; ' and he saw ' them tearing off that organ, and eating it, and thus feeding upon their own substance.' In some experi- ments, in which part of their intestines were left out, he observed them, as soon as they had the opportunity, tear to pieces their own viscera with- out any visible pain. Although it may be advantageous that these important organs shall be thus devoid of sensibility when in health, in order that we may be unconscious of their action and motion, and that they may be rendered perfectly independent of the will, yet it is equally needful that, by the feeling of pain, we should be warned of the existence of any dangerous disease : and thence it happens that this membrane, and also the organ which it invests, acquire under inflammation the highest degree of sensi- bility. The countenance of the horse labouring under pleurisy or pneu- monia will suflBciently indicate a state of suffering ; and the spasmed bend of his neck, and his long and anxious and intense gaze upon his side, tell us that that suffering is extreme. Nature, however, is wise and benevolent even here. It is not of every morbid affection, or morbid change, that the animal is conscious. If a mucous membrane is diseased, he is rendered painfully aware of that, for neither respiration nor digestion could be perfectly carried on while there was any considerable lesion of it ; but, on the other hand, we find tubercles in the parenchyma of the lungs, or induration or hepatisation of their substance, or extensive adhesions, of which there were few or no indica- tions during life. The pleura adheres intimately to the ribs and to the substance of the lungs, yet it is a very singular connection. It is not a continuance of the same organisation ; it is not an interchange of vessels. The organ and its membrane, although so closely connected for a particular purpose, yet in \ery many cases, and where it would least of all be suspected, have little or no sympathy with each other. Inflammation of the lungs will some- times exist, and will run on to disorganisation, while the pleura will be very little afi'ected : and, much oftener, the pleura will be the seat of inflammation and will be attended by increased exhalation to such an extent as to suffocate the animal, and yet the lungs will exhibit little other SPASM OF THE DIAPHRAGM. 'J63 morbid appearance than that of mere compression. The disease of a mucous membrane spreads to other parts — that of a serous one is generally isolated. It was to limit the progress of disease that this difference of structure between the organ and its membrane was contrived. The investing membrane of the lungs and that of the heart are in con- tinual contact with each other, but thej are as distinct and unconnected, as if they were placed in different parts of the frame. Is there no meaning in this ? It is to preserve the perfect independence of organs equally important, yet altogether different in structure and function — to oppose an insuperable barrier to hurtful sympathy between them, and especially to cut off the communication of disease. Perhaps a little light begins to be thrown on a circumstance of which we have occasional painfal experience. AYhile we may administer physic, or mild aperients at least, in pleurisy, not only with little danger, but with manifest advantage, we may just as well give a dose of poison as a physic- ball to a horse labouring under pneumonia. The pleura is connected with the lungs, and with the lungs alone, and the organisation is so different, that there is very Httle sympathy between them. A physic-ball may,, therefore, act as a counter-irritant, or as giving a new determination to the vital current, Tvdthout the propagation of sympathetic irritation ; but the lungs or the bronchial tubes that ramify through them are continuous with the mucous membranes of the digestive as well as all the respiratory passages ; and on account of the continuity and similarity of organisation, there is much sympathy between them. If there is irritation excited at the same time in two different portions of the same membrane, it is pro- bable that, instead of being shared between them, the one will be trans- ferred to the other — will increase or double the other, and act with fear- ful and fatal violence. SPASM OP THE DIAPHRAGM. The diaphragm is subject to injury and disease of a serious and varied character. Whatever may be the original seat of thoracic or abdominal ailment, the diaphragm soon becomes ii-ritable and inflamed. This accounts for the breathing of the horse being so much affected under every inflam- mation or excitement of the chest or belly. The irritability of this muscle is often evinced by a singular spasmodic action of a portion, or the wholo of it. Mr. Castley, in 'The Veterinarian' for 1831, thus describes a case of it : — ' A horse had been very much distressed in a run of nearly tliirteen miles, without a check, and his rider stopped on the road towards home, to rest him a little. With difficulty he was brought to the stable. Mr. Castley was sent for, and he says, — " When I first saw the animal, his breathing and attitude indicated the greatest distress. The prominent symptom, however, was a convulsive motion, or jerking of the whole body, audible at several yards' distance, and evidently proceeding from his inside ; the beats appeared to be about forty in a minute. On placing my hand over the heart, the action of that organ could be felt, but very in- distinctly ; the beating evidently came from behind the heart, and was most plainly to be felt in the direction of the diaphragm. Again placing my hand on the abdominal muscles, the jerks appeared to come from before backwards ; the impression on my mind, therefore, Avas, that this was a spasmodic affection of the diaphragm, brought on by violent dis- tress in running." ' ^Iv. Castley's account is inserted thus at length, because it was fhe first of the kind on record, Avith the exception of an opinion of Mv. 264 RUPTURE OF THE DIAPHRAGM. Apperley, in his work 'Nimrod on the Condition of Hunters,' which came very near to the truth. ' When a horse is very much exhausted after a long run with hounds, a noise will sometimes be heard to proceed from his inside, which is often erroneously supposed to be the beating of his heart, whereas it proceeds from the excessive motion of the abdominal muscles ' Mr, Castley shall pursue his case (it will be a most useful guide to the treatment of these cases) : ' Finding that there was Httle pulsation to bo felt at the submaxillary artery, and judging from that circumstance that any attempt to bleed at that time would be worse than useless, I ordered stimulants to be given. "We first administered three ounces of spirit of nitric ether, in a bottle of warm water ; but this producing no good efiiect, we shortly afterwards gave two drachms of the sub-carbonate of ammonia in a ball, allowing the patient, at the same time, plenty of white water to drink. About a quarter of an hour after this, he broke out into a profuse perspiration, which continued two hours, or more. The breathing became more tranquil, but the convulsive motion of the diaphragm still continued without any abatement. After the sweating had ceased, the pulse became more perceptible, and the action of the heart more distinct, and I considered this to be the proper time to bleed. When about ten pounds had been ex- tracted, I thought that the beating and the breathing seemed to increase ; the bleeding was stopped, and the patient Httered up for the night. In the morning, the affection of the diaphragm was much moderated, and about eleven o'clock it ceased, after continuing eighteen or nineteen hours, A Kttle tonic medicine was afterwards administered, and the horse soon re- covered his usual appetite and spirits.' Later surgeons administer, and with good effect, opium in small doses, together with ammonia, or nitric ether, and have recourse to bleeding as soon as any reaction is perceived. Over- fatigue, of aLmost every kind, has produced spasm of the diaphragm, and so has over- distension of the stomach with grass. RUPTURE OP THE DIAPHRAGM. This is an accident, or the consequence of disease, very lately brought under the cognisance of the veterinary surgeon. The first communication of its occurrence was from Mr. King, a friend of Mi-. Percivall, in ' The Veterinarian,' 1828. It occurred in a mare that had been ridden sharply for half a dozen miles when she was full of grass. She soon afterwards exhibited symptoms of broken-wind, and, at length, died suddenly, while standing in the stable. The diaphragm was lacerated on the left side, through its whole extent, throwing the two cavities into one. Since that period, from the increasing and very proper habit of examining every dead horse, cases of this accident have rapidly multiplied. Mr. Percivall states, in his ' Hippopathology,' that it may follow any act of extraordinary exertion, and efforts of every kind, particularly on a full stomach, or when the bowels are distended with green or other food Likely to generate gas. Considerable caution, however, should be exercised when much gaseous fluid is present, for the bowels may be distended, and forced against the diaphragm to such a degree as to threaten to burst. An interesting case of rupture of the diaphragm was related by Professor Spooner at one of the meetings of the Veterinary Medical Association, A horse having been saddled and bridled for riding, was turned in his stall and fastened by the bit-straps. Something frightened him — he reared, broke the bit-strap, and fell backward. On the following morning he was evidently in great pain, kicking, heaving, and occasionally lying down. Mr. S. was sent for +o examine him, but was not told of the event of the preceding day. He considered it to be a case of enteritis, and treated it CATARRH, OR COLD 265 accordingly. He bled him largely, and, in the course of the day, the horse appeared to be decidedly better, every symptom of pain having vanished. The horse was more lively — he ate with appetite, but his bowels remained constipated. On the following day there was a fearful change. The animal was suffering sadly — the breathing was laborious, and the membrane of the nose intensely red, as if it were more a case of inflammation of the lungs than of the bowels. The bowels were stdl constipated. The patient was bled and physicked again, but without avail. He died, and there was found rupture of the diaphragm, protrusion of intestine into the thoracic cavity, and extensive pleural and peritoneal inflammation. In rupture of the diaphragm the horse occasionally sits on his haunches like a dog, but this is far from being an infallible symptom of the disease. It accompanies introsusception, as well as rupl-ure of the diaphragm. The weight of the intestines may possibly cause any protruded part of them to descend again into the abdomen. CATARRH, OR COLD. Catarrh, or cold, is attended by a slight defluxion from the nose — now and then, a slighter weeping from the eyes, and some increased labour of breathing, on account of the uneasiness which the animal experiences from the passage of the air over the naturally sensitive and now more than usually irritable surface, and from the air-passage being diminished by a thickening of the membrane. When this is a simply local inflammation, attended by no loss of appetite or increased animal temperature, it may speedily pass over. In many cases, however, the inflammation of a membrane naturally so sensitive, and rendered so morbidly irritable by our absurd treatment, rapidly spreads, and involves the fauces, the lymphatic and some of the salivary glands, the throat, the parotid gland, and the membrane of the larynx. "We have then increased discharge from the nose, greater redness of the membrane of the nose, more defluxion from the eyes, and loss of appetite from a degree of fever associating itself with the local affection, and there also being a greater or less degree of pain in the act of swallow- ing, and which if the animal feels he will never eat. Cough now appeal's more or less frequent or painful ; but with no great acceleration of the pulse, or heaving of the flanks. Catarrh may arise from a thousand causes. Membranes subjected to so many sources of irritation soon become irritable. Exposure to cold or rain, change of stable, change of weather, change of the sKghtest portion of clothing, neglect of grooming, and a variety of circumstances appa- rently trifling, and which they who are unaccustomed to horses would think could not possibly produce any injurious effect, are the causes of catarrh. In the spring of the year, and while moulting, a great many young horses have cough ; and in the dealers' stables, where the process of making up the horse for sale is carrying on, there is scarcely one of them that escapes this disease. In the majority of cases, a few warm mashes, warm clothing, and a cool stable, and a fever ball or two, will set all right. Indeed, all would soon be right without any medicine ; and much more speedily and per- fectly than if the cordials, of which grooms and farriers are so fond, had been given. Nineteen horses out of twenty with common catarrh will do well ; but in the twentieth case, a neglected cough may be the precursor of bronchitis, and pneumonia. These chest affections often insidiously creep on, and inflammation is frequently established before any one be- longing to the horse is aware of its existence. Purgative medicines 266 INFLAMMATION OF THE LARYNJ. should never be given in catan^li. It can scarcely be known what sym- patliy may exist between the portion of membrane already affected, and the mucous membranes generally. In severe thoracic affection, or in that which may soon become so, a dose of physic would be Httle better than a dose of poison. If, however, careful investigation renders it evident that there is no affection of the lungs, and that tie disease has not proceeded beyond the fauces, small doses of aloes may with advantage be united with other medicines in order to evacuate the intestinal canal, and reduce the fgecal discharge to a pultaceous form. If catarrh is accompanied by sore throat ; if the parotids should enlarge and become tender — there are no tonsils, amygdalce, in the horse — or if the submaxillary glands should be inflamed, and the animal should quid his food and gulp his water, this will be an additional reason for carO; and also for warm clothing and a comfortable stable. A hot stable is not meant by the tenn comfortable, in wliich the foul air is breathed over and over again, but a temperature some degrees above that of the external air, and where that determination to the skin and increased action of the exhalent vessels, which in these cases are so desirable, may take place. Every stable, both for horses in sickness and in health, should have in it a thermometer. Some stimulating liniment may be applied over the inflamed gland, strong enough to produce considerable irritation on the skin, but not to blister, or to destroy the hair. An embrocation sufiiciently powerful, and yet that never destroys the hair, consists of equal parts of harts- horn, oil of turpentine, and camphorated spirit, with a small quantity of laudanum. INFLAMMATION OP THE LARYNX. Strictly speaking, this refers to inflammation confined to the larynx, but either catarrh or bronchitis, or both, frequently accompany the complaint. Its approach is often insidious, scarcely to be distinguished from catarrh except by being attended with more soreness of throat, and less enlarge- ment of the parotid glands. There are also more decided and violent paroxysms of coughing than in common catarrh, attended by a gurgling noise, which may be heard at a little distance from the horse, and which, by auscultation, is decidedly referable to the larynx. The breathing is shorter and quicker, and evidently more painful than in catarrh ; the membrane of the nose is redder ; it is of a deep modena colour ; and the horse shrinks and exhibits great pain when the larynx is pressed upon. The paroxysms of coughing become more frequent and violent, and the animal appears at times almost suffocated. As the soreness of the throat proceeds, the head of the animal is pro- jected, and the neck has a peculiar stiffness. There is also much difficulty of swallowing. Considerable swelling of the larynx and the pharynx ensues, and also of the parotid, subling-ual, and submaxillary glands. As the inflammation increases, the cough becomes hoarse and feeble, and in some cases altogether suspended. At the commencement there is usually little or no nasal defluxion, but the secretion soon appears, either pure or mixed with an unusual quantity of saliva. Auscultation is a very important aid in the discovery of the nature and serious or trifling character of this disease. It cannot be too often re- peated that it is one of the most valuable means which we possess of detecting the seat, intensity and results, of the maladies of the respiratory passages. No instrument is required ; the naked ear can be applied evenly and flatly, and with a very slight pressure, on any part that it is of importance to examine. The healthy sound, when the ear is applied to INFLAMAtATION OF THE TRACHEA. 267 tlie "windpipe, is tliat of a body of air passing ■uninterruptedly tlirougli » smootli tube of somewhat considerable calibre : it very much resembles the sound of a pair of forge bellows, when not too violently worked. He who is desirous of ascertaining whether there is any disease in the larynx of a horse, should apply his ear to the lower part of the windpipe. If he finds that the air passes in and out without interruption, there is no disease of any consequence either in the windpipe or the chest ; for it would immediately be detected by the loudness or the interruption of the murmur. Then let him gradually proceed up the neck with his ear still upon the windpipe. Perhaps he soon begins to recognise a little gurgling, grating sound. As he continues to ascend, that sound is more decisive, mingled with an occasional wheezing, whistKng noise. He can have no surer proof that here is the impediment to the passage of the air, proceed- ing from the thickening of the membrane and diminution of the passage, or increased secretion of mucus, which bubbles and rattles as the breath passes. By the degi-ee of the rattling or whistling, the owner will judge which cause of obstruction preponderates — in fact, he "ndll have discovered the seat and the state of the disease, and the sooner he has recourse to professional advice the better. Chronic lainingitis is of more frequent occurrence than acute. Many of the coughs that are most troublesome are to be traced to this source. In violent cases laryngitis terminates in suffocation ; in others, in thick wind or in roaring. Occasionally it is necessary to have recourse to the operation of tracheotomy. In acute laryngitis the treatment to be pursued is sufficiently plain. Blood must be abstracted, and that from the jugular vein, for there will then be the combined advantage of general and local bleeding. The blood must be somewhat copiously withdrawn, depending on the degree of in- flammation— the practitioner never for a moment forgetting that he has to do with inflammation of a mucous membrane, and that what he does he must do quickly. He will have lost the opportunity of struggling successfully with the disease when it has altered its character and debility has succeeded. The cases must be few and far between when the surgeon makes up his mind to any determinate quantity of blood, and leives his assistant or his groom to abstract it ; he must himself bleed, and tmtil the pulse flutters or the constitution is evidently afiected. !N"ext must be given the fever medicine already recommended : the nitre, and emetic tartar, with aloes. Aloes may here be safely given, because the chest is not yet implicated. To this must be added, and immediately, a blister, and a sharp one. The surgeon is sure of the part, and he can bring his counter-irritant almost into contact with it. Inflammation of the larynx, if not speedily subdued, produces sad disor- ganisation in this curiously formed and important machine. Lymph is effused, morbidly adhesive, and speedily organised — the membrane becomes thickened, considerably, permanently so — the submucous cellular tissue becomes oedematous ; the inflammation spreads from the membrane of the larynx to the cartilages, and difficulty of breathing, and at length confirmed roaring, ensue. INFLAMMATION OP THE TRACHEA. Inflammation of the membrane of the larynx, and especially when it has run on to ulceration, may rapidly spread, and involve the greater part or the whole of the lining membrane of the trachea. Auscultation will dis- cover when this is taking place. If the disease is extending down the trachea, it must be followed. A blister miist reach as low as the rattling sound can be detected, and somewhat beyond this, and the fever medicines must be administered in somewhat increased doses. «6« ROARING. Geuerally speaking, however, although ihe inflammation is now ap- proaching the chest, its extension into the trachea is not an unfavourable symptom. It is spread over a more extended surface, and is not so intense or untractable. It is involving a part of the frame less compHcated, and where less mischief can be efiected. True, if the case is neglected, it must terminate fatally ; but it is coming more within reach, and more under command, and, the proper means being adopted, the change is rather a favourable one. The disorganisations produced in the trachea are similar to some which have been described in the larynx. The same formation of organised bands of coagulated lymph, the same thickening of membrane, dimination of calibre, and foundation for roaring. ROARING. The present wiU be the proper place to speak of that singular impair- ment of the respiratory function recognised by this name. It is an unna- tural, loud grunting sound made by the animal in the act of breathing when in quick action or on any sudden exertion. On carefully listening to the sound, it will appear that the roaring is produced in the act of in- spiration and not in that of expiration. If the horse is briskly trotted on a level surface, and more particularly if he is trotted up hill, or if he is suddenly threatened with a stick, this peculiar sound will be heard and cannot be mistaken. When dishonest dealers are showing a horse that roars, but not to any great degree, they trot away gently, and as soon as they are too far for the sound to be heard, show off the best paces of the animal : on returning, they gradually slacken their speed when they come within a suspicious distance. This is sometimes technically called ' the dealers' long trot.' Roaring is exceedingly unpleasant to the rider, and it is manifest un- soundness. It is the sudden and violent rushing of the air through a tube of diminished cahbre ; and if the impediment, whatever it is, renders it so -difficult for the air to pass in somewhat increased action, sufficient cannot be admitted to give an adequate supply of arteriahsed blood in extra- ordinary or long-continued exertion. Therefore, as impairing the function of respiration, although, sometimes, only on extraordinary occasions, it is unsoundness. In as many cases as otherwise, it is a very serious cause ol unsoundness. The roarer, when hardly pressed, is often blo^vn even to the hazard of suffocation, and there are cases on record of his suddenly drop- ping and dying when urged to the top of his speed. It must not, however, be taken for granted that the roarer is always worthless. There are few hunts in which there is not one of these horses, who acquits himself very fairly in the field ; and it has occasionally so happened that the roarer has been the very crack horse of the hunt : yet he must be ridden with judgment, and spared a little when going up-hill. There is a village in the West Riding of Yorkshire, through which a band of smugglers used frequently to pass in the dead of night: the horse of the leader, and the best horse of the troop, and on which his owner would bid defiance to all pursuit, was so rank a roarer that he could be heard at a considerable distance. The clattering of aU the rest scarcely made so much noise as the roaring of the captain's horse. When this became a little too bad, and he did not fear immediate pursuit, the smuggler used to halt the troop at some convenient hayrick, on the roadside, and, having suffered the animal tc distend his stomach with this dry food, as he was always ready enough to do, he would remount and gallop on, and, for a while, the roaring was scarcely heard. It is somewhat difficult to account for this. Perhaps the loaded stomach now pressing against the diaphragm, ROARING. 265 that muscle had harder work to displace this viscus in the act of enlarging the chest and producing the act of inspiration, and accomplished it more slowly, and therefore, the air passing more slowly by, the roaring was diminished. We do not dare to calculate what must have been the in- creased labour of the diaphragm in moving the loaded stomach, nor how much sooner the horse must have been exhausted. This did not enter into the owner's reckoning, and probably the application of whip and spur would deprive him of the means of forming a proper calculation of it. Roaring proceeds from obstruction in some portion of the respiratory canal, andoftenest in the larynx, where there is the least room to spare — that cartilaginous box being occupied by the mechanism of the voice : next in frequency it is in the trachea, but, in fact, obstruction anywhere will produce it. Mr. Blaine, quoting from a French journalist, says, that a piece of riband lodged within one of the nasal fossa? produced roaring, and that even the displacement of a molar tooth has been the supjiosed cause of it. Polypi in the nostrils have been accompanied by it. Mr. Sewell found, as an evident cause of roaring, an exostosis between the twc first ribs, and pressing upon the trachea ; and Mr. Percivall goes farther, and says that his father repeatedly blistered and fired a horse for bad roaring, and even performed the operation of tracheotomy, and at length the roaring being so loud when the horse was led out of the stable, that it was painful to hear it — the poor animal was destroyed. No thickening of the membrane was found, no disease of the larynx or trachea ; but the lungs were hepatised throughout the greater part of theii' substance, and many of the smaller divisions of the bronchi were so compressed, that they were hardly pervious. Bands of Coagidated Lj/mpJi. — A frequent cause of roaring is bands of coagulated lymph, morbidly viscid and tenacious, adhering firmly on one side, and by some act of cougliing brought into contact vdib. and adhering to the other side, and becoming gradually organised. At other times there have been rings of coagulated lymph adhering to the lining of the trachea, but not organised. In either case they form a mechanical ob- struction, aiLd will account for the roaring noise produced by the air rushing vimently through the diminished calibre, in hurried respiration. Thickening of the membrane is a more frequent cause of roaring than the transverse bands of coagulated lymph. In many morbid specimens it ia double or treble its natural thickness, and covered with manifold ulcer- ations. This is particularly annoying in the upper part, of the windpipe, where the passages in their natural state are narrow. Thus it is that roaring is the occasional consequence of strangles and catarrh, and other affections of the superior passages. There is scarcely a horse of five or six years old who has not a portion of the thyroid cartilage ossified. In some cases the greater part of the cartilages are becoming bony, or sujBGciently so to weaken or destroy their elastic power, and consequently to render it impossible for them to be freely and fully acted upon by the dehcate muscles of the larynx. Chronic cough occasionally terminates in roaring. Some have imagined that the dealers' habit of coughing the horse, i.e. pressing upon the larynx to make him cough, in order that they may judge of the state of his wind by the sound that is emitted, has produced inflammation about the larynx, which has terminated in roaring, or assisted in producing it. That pain is given to the animal by the rough and violent way in which the object is sometimes attempted to be accomplished, is evident enough, and this must, in process of time, lead to mischief; but sufficient inflammation and sub- sequent ossification of the cartilages would scarcely be produced, to be a cause of roaring. i70 ROARING. There can be no doubt of the fact, that the majority of roarers are draught-horses, and horses of quick draught. They are not only subject to the usual predisposing causes of this obstruction, but there is something superadded, — resulting from their habits or mode of work, — not indeed necessarily resulting, but that which the folly as Avell as cruelty of man has introduced — the system of tight-reining. To a certain extent, the curb-rein is necessary. Without it there would be scarcely any command over a Avilfal horse, and it would need a strong arm occasionally to guide even the most wilHng. Without the curb -rein the horse would carry himself low ; he would go carelessly along ; he would become a stumbler ; and if he were disposed at any time to run away, the strongest arm would have little power to stop him : but there is no necessity for the tight rein, and for the long and previous discipline to which the carriage-horse is subjected. There is no necessity that the lower jaw, whether the channel is wide or narrow, should be so forced on the neck, or that the larynx and the portion vhich might have been considered a merely curious coincidence, is abso- lutely an universally-recognised cause of this disease — the other causes already enumerated may occasionally produce the same result, but in the present day they Avill be received as mere exceptions to a very general rule. Facts have established the hereditary predisposition to roaring, beyond the possibiHty of doubt. In France it is notorious that three-fourths of the horses from Cottentin are roarers and some of them are roarers at six months old ; but about La Hague and Le Bocase, not a roarer is kno"\vn. There is certainly a considerable difference in the soil of the two districts ; the first is low and marshy, the latter elevated and dry : but tradition traces it to the intro- duction of some foreign horses into Cottentin, who bequeathed this infirmity to their progeny. In our own country, there is as decisive a proof. There was a valuable stalHon in Norfolk, belonging to Major Wilson, of Didlington. He was a great favourite, and seemed to be getting some excellent stock ; but he was a roarer, and some of the breeders took alarm at this .They had occa- sionally too painful experience of the communication of the defects of the parent to his progeny ; and they feared that roaring might possibly be among these hereditary c-vtlIs. Sir Charles Bunbury was requested to obtain Mr. Cline's opinion on the subject, Mr. Cline was a deservedly eminent human surgeon : he had exerted himself in the establishment of the Veterinary College : he was an examiner of veterinary pupils, and therefore it was supposed that he must be competent to give an opinion. He gave one, and at considerable length : — ' The disorder in the horse,' said he, ' which constitutes a roarer, is caused by a membranous projec- tion in a part of the windpipe, and is the consequence of that part having been inflamed from a cold, and injudiciously treated. A roarer, therefore, is not a diseased horse, for his lungs and every other part may be perfectly sound. The existence of roaring in a stalHon cannot be of any conse- quence. It cannot be propagated any more than a broken bone, or any other accident.'- — A fair specimen of the horse-knowledge of one of the best of the medical examiners of veterinary pupils. Sir Charles returned full of glee ; the good people of Norfolk and Suffolk were satisfied ; Major Wilson's horse was in high request : but in a few years a great part of the two counties was overrun with roarers, and many a breeder half ruined. Roaring is not, however, necessarily heredi- tary. Mr. Goodwin, whose name is great authority, states that Taurus, a celebrated racer that had become a roarer, had covered several mares, and their produce all turned out well, and had won several races. In no instance did his progeny exhibit this defect, notwithstanding that his own family were notorious for being roarers. EcHpse also is said to have been a roarer. What then is to be done with these animals ? Abandon them to their fate ? No, not so ; but there is no necessity rashly to undertake a hopeless affair. AU possible knowledge must be obtained of the origin of the disease. Did it follow strangles, catarrh, bronchitis, or any affection of the respiratory passages ? Is it of long standing ? Is it now accom- panied by cough or any symptoms of local or general irritation ? Can any disorganisation of these parts be detected ? Any distortion of the larynx ? Did it follow breaking-in to harness ? The answer to these questions will materially guide any fatare proceedings. If there is plaiu distortion of the larynx or trachea, or the disease 272 INFLUENZA. can be associated, in point of time, ■writh breaking-in to harness, or the coachman or proprietor has been accustomed to rein the animal jd too tightly or too cruelly, or the sire was a roarer, it is almost useless to have anything to do with the case. But if it is of rather recent date, and following closely on some disease with which it can be clearly connected, careful examination of the patient may be commenced. Is there cough ? Can any heat or tenderness be detected about the larynx oi' trachea ? Is there in every part the same uniform rushing noise ; or, on some particular spot, can a more violent breathing, a wheezing oi whistling, or a rattling and guggling, be detected ? Is that wheezing or ratthng either confined to one spot, or less sonorous as the ear recedes from that spot above or below ; or is it diffused over a considerable portion of the trachea ? In these cases it would be fair to purge, and most certainly to blister. The ear will guide to the part to which the blister should be applied. The physic having set, a course of fever medicine should be commenced. It should be considered as a case of chronic inflammation, and to be subdued by a continuance of moderate depletory measures. A second dose of physic should be given, and, most certainly, the blister should be repeated, or kept discharging by means of some stimulating unguent. Of late years the actual cautery has been employed, and firing horses' throats for roaring is at the present time a very fashionable remedy with some practitioners, but it possesses no particular curative power, further than being a more powerful counter-irritant than the common blister ointment, but has the disadvantage of causing a permanent blemish. The degree of success which attends these measures would determine the farther pursuit of them. No one would eagerly undertake a case of roar- ing ; but, having undertaken it, he should give the measures that he adopts a fair trial, remembering that, in every chronic case like this, the only hope of success depends on perseverance. The terms wheezing and whistling are simply varieties of roaring, and express the noise made in the act of respiration. Wheezing is a sound not unlike that of an asthmatic person when hurried, and sometimes arises from impediments in the air-passages of the lungs. It can be heard at all times, even when the horse is at rest in the stable. The whistler utters a shriller sound than the wheezer, but only when in exercise, and that of some continuance. A sudden motion will not always produce it. A sharp gallop up-hill will generally detect the whistler, although in some instances, when slight, it will be heard more distinctly in slow paces. It usually proceeds from the same causes as roaring and frequently terminates in that disease. Both these states constitute unsoundness. When the obstruction seems to be principally in the nose, the horse loudly puffs and blows, and the false nostrils are dilated to the utmost, while the flanks are comparatively quiet. This animal is said to be a High-blower. With all his apparent distress, he often possesses great speed and endurance. The sound is unpleasant, but the lungs may be perfectly sound. INFLUENZA, OR EPIDEMIC CATARRH. Various names are given to this disease — influenza, distemper, catarrhal fever, and epidemic catarrh — its usual history is as follows. Ii? the spring of the year — a cold wet spring — and that succeeding to a mild winter, and es])ecially among young horses, and those in high condition, or made up for sale, or that have been kept in hot stables, or exposed to the usual causes of inflammation, this disease principally prevails. Those that are in moderate work, and that are correspondingly fed, INFLUENZ^ 273 occasionally escape, or, even when it appears in most of the stables of any particular district, horses in barracks, regularly worked and moderately fed, although far from being entirely exempt, are comparatively less frequently affected. If it has been observed from the beginning, it will be found that the attack is sudden, frequently ushered in by shivering, and that quickly succeeded by acceleration of pulse, heat of mouth, staring coat, diminution of appetite, painful but not hard cough, redness of the membrane of the nose, swollen and weeping eye, dejected countenance — these are the symptoms of catarrh. The leading characteristics are the typhoid or debilitating character of the disease and the accompanying sore thi'oat — and the ease and certainty with which this sore throat is detected is remark- able, for almost the sUghtest pressure of the finger and thumb on the larynx or upper part of the Avindpipe, of which the animal would not take the shghtest notice when in health, will at once induce short, sore, and abnipt, or a restrained, but evidently painful, attempt to cough : intense thirst is the invariable accompaniment of this attack, and the struggles made to relieve it are unpleasant to vdtness, the water returning by the nostril as fast as it is taken into the mouth, the act of swallowing being too painful an effort for the animal to persist in. This is the form under which the disease is usually now seen. It clearly is not inflammation of the lungs ; for there is no coldness of the extremities, no looking at the flanks, no stiS" immovable position, no obstinate standing up. It is not simple catarrh ; for as early as the second day there is evident debility. The horse staggers as he walks. It is inflammation of the respiratory passages generally. It commences in the membrane of the nose, but it gradually involves the whole of the respiratory apparatus. Before the disease has been estabhshed four-and- twenty hours, there is sore throat. The horse quids his hay, and gulps his water. There is no great enlargement of the glands ; the parotids are a little tumefied, the submaxillary somewhat more so, but not at all equivalent to the degree of soreness. That soreness is excessive, and day after day the horse will obstinately refuse to eat. Discharge from the nose soon follows in considerable quantity: thick, very early pumlent, and sometimes foetid. The breathing is rather accelerated and laborious at the beginning, but does not always increase with the progi'ess of the disease — nay, sometimes, a deceitful calm succeeds, and the pulse, quickened and full at first, soon loses its firmness, and although it usually maintains it3 unnatural quickness, yet it occasionally deviates from this, and subsides to little more than its natural standard. The extremities continue to be comfortably warm, or at least the temperature is variable, and there is not in the manner of the animal, or in any one symptom, a decided reference to any particular part or spot as the chief seat of disease. Thus the malady proceeds for an uncertain period : occasionally for several days — in not a few instances through the whole of its course, and the animal dies exhausted by extensive or general irritation : but in other cases the ioflammation assumes a local determination, and we have bron- chitis or pneumonia, but of no very acute character, yet difficult to treat, from the general debility with which it is connected. Sometimes there are considerable swelHngs in various parts, as the chest, the belly, the extremities, and particularly the head. And when epidemic catarrh first made its appearance in this country, in 1820-21, the leading symptom was engorgement or swelling of the extremities, accompanied by great debihty — the two fore-legs, the two hind-legs, or aU four, would in the course of anight be distended to three or four times their natural size — or the head would receive the first shock, swelling out of all shape, the nostrila T 274 LVFLUENZA. thickened and nearly closed, the eyes supercharged with fluid, and the eyelids puffed out and completely closed — the sore throat always more or less present, but only as a secondary symptom ; and in this distressing form we occasionally meet with it still. The most decided character in this disease is debility, Not the stiff, unwilling motion of the horse with pneumonia, and which has been mistaken for debility — every muscle being needed for the purposes of respiration, and therefore imperfectly used in locomotion — but actual loss of power of the muscular system generally. The horse staggers from the second day. He threatens to fall if he is moved. He is sometimes down, permanently down, on the third or fourth day. The emaciation is also occasionally rapid and extreme. At length the medical treatment which has been employed succeeds, or nature begins to rally. The cough somewhat subsides ; the pulse assumes a more natural standard; the countenance acquires a Httle more animation; the horse will eat a small quantity of some choice thing ; and health and strength slowly, very slowly indeed, return : but at other times, when there has been no decided change during the progress of the disease, a strange exacerbation of symptoms accompanies the closing scene. The extremities become deathly cold; the flanks heave; the countenance betrays greater distress ; the membrane of the nose is of an intense red ; and inflammation of the substance of the lungs, and congestion and death, speedily follow. At other times the redness of the nostril suddenly disappears : it becomes purple, livid, dirty brown, and the discharge is bloody and foetid, the breath and all the excretions becoming foetid too. The mild character of the disease gives way to malignant typhus : swellings, and purulent ulcers, spread over different parts of the frame, and the animal is soon destroyed. Post-mortevi Examination. — Examination after death sufficiently displays the real character of the disease, — inflammation first of the respiratory passages, and, in fatal or aggravated cases, of the mucous membranes generally. From the pharynx to the termination of the small intestines, and often including even the larger ones, there will not be a part free from inflammation ; the upper part of the trachea will be filled with adhesive spume, and the lining membrane thickened, injected, or ulcerated; the lining tunic of the bronchi will exhibit unequivocal marks of inflam- mation ; the substance of the lungs will be engorged, and often inflamed ; the heart will partake of the same affection ; its external coat will be red, or purple, or black, and its internal one will exhibit spots of ecchymosis ; the pericardium will be thickened, and the pericardiac and pleuritic bags will contain an undue quantity of serous, or bloody-serous, or semi-purulent fluid. The oesophagus wUl be inflamed, sometimes ulcerated — the stomach frequently so ; the small intestines will vmiformly present patches of inflammation or ulceration. The liver will be inflamed — the spleen enlarged — no part, indeed, will have escaped ; and if the malady has assumed a typhoid form in its latter stages, the universality and malig- nancy of the ulceration will be excessive. This disease is clearly attributable to atmospheric influence, but of the precise nature of this influence we are altogether ignorant. It is some foreio-n injurious principle which mingles with and contaminates the air, but whence this poison is derived, or how it is diffused, we know not. It is engendered, or it is most prevalent, in cold ungenial weather ; or this weather may dispose the patient for catarrh, or prepare the tissues to be affected by causes which would otherwise be harmless, or which may at all times exis-t. INFLUENZA. 275 It is most frequent in the spring of the year, but it occasionally rages in autumn and in ■winter. It is epidemic ; it spreads over large districts. It sometimes pervades the whole country. Scarcely a stable escapes. Its appearance is sudden, its progress rapid. Mr. Wilkinson had thirty-six new cases in one day. It is said that a celebrated practitioner in London had nearly double that number in less than twenty-four hours. At other times it is endemic. It pervades one town ; one little tract oi country. It is confined to spots exceedingly circumscribed. It is dependent on atmospheric agency, but this requires some injurious adjuvant, and the principle of contagion may probably be called into play. It has been rifo enough in the lower parts of the metropoHs, while in the upper and north-western districts scarcely a case has occurred. It has occasionally been confined to a locaHty not extending half-a-mile in any direction. In one of the cavalry barracks the majority of the horses on one side of the yard were attacked by epidemic catarrh, while there was not a sick horse on the other side. These prevalences of disease, with these exceptions, are altogether unaccountable. The stables, and the system of stable manao-ement, have been most carefully inquired into in the infected and the healthy districts, and no satisfactory difference could be ascertained. One fact, however, has been established, and a very important one it is to the horse proprietor as weU as the practitioner. The probability of the disease seems to be in proportion to the number of horses inhabiting the stable. Two or three horses shut up in a comparatively close stable may escape. Out of thirty horses, disti-ibuted through ten or fifteen small stables, not one may be affected ; but in a stable containing ten or twelve horses the disease will assuredly appear, although it may be proportionally laro-er and well ventilated. It is on this account that postmasters and horse-dealers dread its appearance. In a sickly season their stables are never free from it ; and if, perchance, it does enter one of their largest Btables, almost every horse will be affected. Therefore also it is that grooms have so much di-ead of a distempered stable, and that the odds are BO seriously affected if distemper has broken out in a racing establishment. Does this lead to the conclusion that epidemic catarrh is contagious ? Not necessarily, but it excites strong suspicion of its being so, and there are 60 many facts of the disease extending to nearly every animal in the stable, ihat it has been considered both infectious and contagious. There are many well-informed grooms, and extensive ovmers of horses, and living much among them, and even veterinary surgeons of considerable prac- tice, who have considerable doubt about the matter — they lose sight, however, of the fact, that there is in reahty no occasion to fly to either infection or contagion to explain this. In a stable of twenty horses the Dame cause that affects one may, and sometimes does, affect the other nineteen, or any intei-mediate number ; knowing this to be the cause, why look for adventitious causes when the same malaria, or whatever else you may please to call it, may equally prostrate one, one score, or one lindred ? With regard to the treatment of epidemic catarrh there should not be any considerable difiiculty. It is a disease of the mucous membrane, and thus connected with much debihty ; but it is also a disease of a febrile cha- racter, and the inflammation is occasionally considerable. The veterinary surgeon, therefore, must judge for himself. Is the disease in its earhest stage marked by inflammatory action ? Is there much redness of the nasal membrane ? much acceleration of the pulse ? some heaving of the flank ? and, if so, must not blood be abstracted ? No, a thousand times no ! Every drop lost may afterwards be wanted. !May be ? — nay, most surely will be wanted, and alas ! wanted in vain. The disease is a typhoid fever, •276 INFLUENZA. and debilitates wliile it excites. The seat of the disease is a mucous membrane, and nature's cure for a disease of a mucous membrane is to increase its secretion, and thus thi^ow off the morbific cause. Will bleeding assist tlie debihty, or enable the membrane to increase its functional discharge ? It will, so far from it, prostrate the powers of nature and disable her from having recourse to those health-restoring measures on which hfe itself may depend. The treatment of catarrh should consist of giving a fever draught con- taining an ounce of spu-its of nitric ether, with six or eight ounces of hquor ammonias acetatis, in a pint of water, twice a day. It has been objected that no medicine whatever should be given while the throat is so inflamed and sore ; but so far from this being an objection, it is the very reason why a draught should be administered ; for, however smaU a quantity may be swallowed, it acts as a gargle to the throat, and soon modifies the diseased action of the mucous membrane. Counter- irritation to the throat is most important ; for as sure as the outer skin becomes sore the internal surface of the thi'oat becomes less so. The best application is the infasion or tincture of Spanish flies diluted with a little soap liniment and spirit of turpentine. This should be well rubbed in, enough having been appHed to well moisten the skin, till the horse shakes his head at you as the indi- cation of feeling it ; and may be repeated night and morning till the thick scurf is thrown out on the skin. Should this fail in giving relief in forty- eight hours, the throat should be bHstered ; and if the cough continues troublesome, the insertion of a seton for a fortnight or three weeks will generally remove it. Can fomentations be applied to relieve the inflamed and turgid membrane of the mouth, nostrils, and fauces ? Yes, and to the very parts, by steaming the head. For this purpose a pail or nose-bag should be half filled with hay, boiling water poured on it, and the horse's head kept steadily over it as long as the steam ascends, turning the hay occasionally. The hay is a much better medium for applying the steam than bran, and is not so Ukely to clog the nostrils. The appetite is seldom altogether lost, although the horse may refase to eat the two or three first days ; this, however, is more from inabihty than from disinclination ; and, generally, on the third day tonics may be had recourse to. The best of these is the sulphate of iron, which may be given in 5ij- doses, dissolved in a pint of water twice a day, or it may be alternated with the tincture or inftision of gentian or columbo. From the first hour a pail of chilled water should be placed within his reach ; and if this is refused do not hesitate after a short time to give him cold — anything to reHeve the intolerable thii'st. He will be paddhng in it with his lips and tongue hours during the day, even if he cannot drink. A little mash of scalded oats and bran in one corner of the manger, a few dry oats and bran in another, a little damp hay or green meat thrown on the litter, to induce him to hold his head low, so that the increased secretion may the more readily escape. The green meat should be offered early, — grass, tares, lucerne, and carrots, — varying the material so as to tempt his fastidious palate. A stricter attention must be paid to diet than the veterinarian usually enforces, or the groom dreams of. The practitioner will often and anxiously have recourse to auscultation. He will listen for the mucous rattle, creeping down the windpipe, and entering the bronchial passages. If he cannot detect it below the larynx, he will apply a strong blister, reaching from ear to ear, and extending to the second or third ring of the trachea. If he can trace the rattle in the windpipe, he must follow it, — he must blister as far as the disease has spread. This Avill often have an excellent efiect, not only as a counter- irritant, but as rousing the languid powers of the constitution. INFLUENZA. 277 A liood is a useful article of clothing in these cases. It increases the perspiration from the surface covering the inflamed part — a circumstance ahvays of considerable moment, and the legs should be ■vvarmlj bandaged up to the hocks and the knees. An equable warmth should be preserved, if possible, over the whole body. The hand-rubber should be gently used every day, and harder and more eflfectual rubbing applied to the legs. The patieirt should, if possible, be placed in a loose box, in which he may move about, and take a little exer- cise, and out of Avhich he should rarely, if at all, be taken. The exercise of which the groom is so fond in these cases, and which must in the most peremptory terms be forbidden, has desti-oyed thousands of horses. The air should be fresh and uncontaminated, but never chilly ; for the object is to increase and not to repress cutaneous perspiration ; to produce, il possible, a determination of blood to the skin, and not to drive it to the part already too much overloaded. In order to accomplish this, the cloth- ing should be rather warmer than usual. The case may proceed somewhat slowly, and not quite satisfactory to the practitioner or his employer. There is not much fever — there is little or no local inflammation ; but there is great emaciation and debility, and total loss of appetite. The feeding should now be sedulously attended to. As before stated, almost every kind of green meat that can be obtained should be given, particularly carrots nicely scraped and sliced. The food should be changed as often as the capricious appetite prompts ; and occasionally, if necessary, the patient should be given gruel as thick as it will run from the horn, but the gradual return of health should be well assiu'ed, before a ftdl allow- ance of com is given. In a communication received from the late Mr. Percivall, the follow- ing account of a new and destructive epidemic amongst horses in 1833-4 is given: — ' From the close of the past year and the beginning of the present, up to the time I am writing, the influenza among horses has continued to prevail in the metropohs and difierent parts of the country with more or less fataHty. In London it has assumed the form of laryngitis, associated in some instances with bronchitis; in others — in all I believe where it has proved fatal— with pleurisy. The parenchymatous structure of the lungs has not partaken of the disease, or but consecutively and slightly. The earhest and most characteristic symptom has been sore throat ; causing troublesome dry short cough, but rarely occasioning any difiiculty of deglu- tition, and, in no instance that I have seen, severe or extensive enough to produce anything like disgorgement or return of the masticated matters through the nose, and yet the sHghtest pressure on the larynx has excited an act of coughing. But seldom has any glandular enlargement appeared. The symptom secondarily remarkable after the sore throat and cough has been a dispiritedness and dullness, for which most epidemics of the kind are remarkable. The animal, at the time of sickening, has hung his head under the manger, with his eyes half shut, and his lower lip pendent, without evincing any alarm or even much notice, though a person entered his abode or approached him ; and if in a box, his head is often found during his illness turned towards the door or window. Fever, without any disturbance of the respiration, has always been present ; the pulse has been accelerated, though rather small and weak in its beat than defective of strength ; the mouth has been hot, sometimes burning hot, after- wards moist, and perhaps saponaceous ; the skin and extremities in general have been warm. Now and then the prostration and appearance of debility have been such, and so rapid in their manifestations, that shortly after '278 INFLUENZA. being attacked, a horse has staggeringly walked twenty yards only — the distance from his stable into the infirmary-box. The appetite, though impaired much, has seldom been altogether lost. Generally, if a Uttle fresh hay has been offered, it has been taken and eaten ; but to mashes there has been commonly great aversion. During the long continuanco of the wind in the east, the sore throat and cough have been unattended by any flux from the nose ; but since the wind has shifted within this last fortnight or three weeks, discharges from the nostrils have appeared, pro- fuse even in quantity, and purulent in their nature ; in fact, the disease has assumed a more catarrhal character — ergo, I might add, a more favourable one. ' The disorder has exhibited every phase and degree of intensity, from the shghtest percmvable dullness, which has passed ofiT with simply a change in the diet, to an insidious, unyielding, unsubduable pleurisy, endino- in hydi'othorax, in spite of everything that could be done, and most timely done. So long as the disease has confined itself to the throat, and that there has been along with that only dejection, prostration, and fever, there has existed no cause for alarm ; bat when such symptoms have, after some days' continuance, not abated, and have, on the contrary, rather increased, and others have arisen which but too well have authorised sus. picion that "mischief was brewing in the chest," then there became the strono-est reasons for alarm for the safety of the patient. What is now to be done ? The practitioner durst not bleed a second time, at least not o-enerally, for the patient's strength would not endure it, although he is sure a pleurisy is consuming his patient. He possesses no efiectual means for topical blood-letting. Neither blisters nor rowels, nor plugs nor setons, will take any effect. Cathartic medicine he must not administer ; nau- seants are uncertain and doubtful in their efficacy ; sedatives, tonics, and stimulants, and narcotics, appear counter- indicated, inflammation existing, and when tried under such circumstances, have, I believe, never failed to do harm. ' Dissatisfied with one and all of these remedies in the late influenza — thouo-h the losses I have experienced have, after aU, not been so very com- paratively great, being no more, since the beginning of the year, than three out of nearly forty cases — I repeat, having, as I thought, reason to be dissatisfied for losing even these three cases, considering that they came under my care at the earliest period of indisposition, I determined, in any similar cases that might occur, to have recourse to that medicine which, in all membranous inflammations in particular, is the physician's sheet- anchor, and which I had exhibited, and still continue to do, myself, in other disorders, though I had never given it a fair trial in epidemics having that tendency which I have described the present one uniformly to have indicated, viz. the destruction of life by an inflammation attacking membranous parts, of a nature over which, being forbidden to bleed, we appeared to possess Httle or no power. Could we have dra-\vn blood from the sides or breast, by cupping or by leeches, in any tolerable quantity, we mio-ht have had some control over the internal disease ; but ban-ed from this and without any remedy save a counter-irritant, which we could not make act, or an internal medicine, whose action became extremely dubious, if not positively hurtful, what was to be done ? I repeat, I made up my mind to experiment with the surgeon's remedy in the same disease, namely, mercury ; and that I have had reason to feel gratified at the result wiU, I think, appear from the following cases : — * Case I. — April 8. Every symptom of the prevailing epidemic : and considerably aggravated on the 10th,when the horse laboured under much prostration of strength, and staggered considerably in his gait. The THE MALIGNANT EPIDEMIC. 2*9 following ball was tlien ordered to be given him t^vice a day : ^o Hydrarg. chlorid, 3i, farin. avenf© ^ss. terebinth, vulg. q. s. ut fiat bol. One to be given morning and night. He soon began to improve ; and was returned to the stable on the 26th, convalescent. A second patient of the same character was cured in eighteen days, and a third in nineteen days.' The author of this work had the pleasure of witnessing these cases. Mr. Percivall adds, ' Lest it should be said, after the perusal of these three cases, that they do not appear to have been of a dangerous character, or to have required anything out of the ordinary line of treatment, I beg to observe, that at the periods at which I submitted them to the action of mercury, they so much resembled three others that had preceded them, and the disease had proved fatal, that, under a continuance of treatment of any ordinary kind, I certainly should have entertained fears for their safety. ' It must be remembered that they were cases in which blood-letting, except at the commencement, was altogether forbidden ; and that at the critical period when mercury was introduced they had taken an un- favourable turn, and that nothing in the shape of remedy appeared available save internal medicine and counter-irritation, and that the latter had not and did not show results betokening the welfare of the patients. Under these circumstances the mercury was exhibited. That it entered the system, and must have had more or less influence on the disease, appears evident from its eflfect on the gums. That it proved the means of cure, I cannot, from so few cases, take upon myself to assert ; but I would recom- mend it in similar cases to the notice of practitioners.' THE MALIGNANT EPIDEMIC. Continental veterinarians describe a malignant variety or termination of this disease, and the imperfect history of veterinary medicine in Britain is not without its records of it. So lately as the year 1815, an epidemic of a mahgnant character reigned among horses. Three out of five who were attacked died. It reappeared in 1823, but was not so fatal. It was said that the horses that died were ultimately farcied : the truth was, that swellings and ulcerations, with fostid discharge, appeared in various parts, or almost all over them — the natural swellings of the complaint which has just been considered, but aggravated and malignant. Our recollection of the classic lore of our early years will famish us with instances of the same pest in distant times and countries. We have not forgotten the vivid description of Apollo darting his fiery arrows among the Greeks, and involving in one common destruction the human being, the mule, the horse, the ox, and the dog. Lucretius, when describing the plague at Athens, speaks of a malignant epidemic affecting almost every animal — Nor longer birds at noon, nor beasts at night Their native woods deserted ; with the pest Remote they languished, and full frequent died: But chief the dog his generous strength resigned. In 1714, a malignant epidemic was imported from the Continent, and in the course of a few months destroyed 70,000 horses and cattle. It con- tinued to visit other countries, with but short intervals, for fifty years afterwards. Out of evil, however, came good. The continental agricul- turists became alarmed by this destruction of their property. The different governments participated in the terror, and veterinary schools were estabhshed, in which the anatomy and diseases of these animals might be studied, and the cause and treatment of these periodical pests discovered. From the time that this branch of medical science began to receive the 280 THE MALIGNANT EPIDEMIC. attention it deserved, these epidemics, if they have not quite ceased, har<5 changed their character, and have become comparatively mild and manage- able. As, however, they yet occur, and are far too fatal, we must endeavour to collect the symptoms, and point out the treatment of them. The malignant epidemic was almost nniformly ushered in by inflamma- tion of the mucous membrane of the respiratory passages, but soon involving other portions, and then ensued a diarrhoea, which no art could arrest. The fever, acute at first, rapidly passed over, and was succeeded by great prostration of strength. The inflammation then spread to the cellular texture, and there was a peculiar disposition to the formation of phleg- monous tumours : sometimes there were pustular eruptions, but, oftener, deep-seated tumours rapidly proceeding to suppuration. Connected with this was a strong tendency to decomposition, and unless the animal was reheved by some critical flux or evacuation, malignant typhus was estab- lished, and the horse speedily sunk. The most satisfactory account of one of these epidemics is given us by Professor Brugnone, of Turin. It commenced with loss of appetite, staring coat, a wild and wandering look, and a staggering from the very commencement. The horse would continually lie down and get up again, as if tormented by colic, and he gazed alternately at both flanks. In the moments of comparative ease, there were universal twitchings of the skin, and spasms of the limbs. The temperature of the ears and feet was variable. If there happened to be about the animal any old wound or scar from setoning or firing, it opened afi'esh and discharged a quantity of thick and black blood. Very shortly afterwards the flanks, which were quiet before, began to heave, the nostrils were dilated, the head extended for breath. The horse had by this time become so weak that, if he lay or fell down, he could rise no more ; or if he was up, he would stand trem- bling, staggering, and threatening to fall every moment. The mouth was dry, the tongue white, and the breath foetid ; a discharge of yellow or bloody foetid matter proceeded from the nose, and foetid blood from the anus. The duration of the disease did not usually exceed twelve or twenty-four hours ; or if the animal lingered on, swellings of the head and throat, and sheath, and scrotum, followed, and he died exhausted or in convulsions. Black spots of extravasation were found in the cellular membrane, in the tissue of all the membranes, and on the stomach. The mesenteric and lymphatic glands were engorged, black, and gangrenous. The membrane of the nose and the pharynx was highly injected, the lungs were filled with black and frothy blood, or with black and livid spots. The brain and its meninges were unaltered. It commenced in March 1783. The barracks then contained one hundred and sixteen horses ; all but thirteen were attacked, and seventy- eight of them died. The horses of both officers and men were subject to the attack of it ; and three horses from the town died, two of which had drawn the carts that conveyed the carcases away, and the other stood under a window, from which the dung of an infected stable had been thrown out. The disease would probably have spread, but the most sum- mary measures for arresting its progress were adopted ; every horse in the town was killed that had the slightest communication with those in the barracks. One horse was inoculated with the pus discharged from the ulcer of an infected horse, and he died. A portion of his thymus gland was introduced under the skin of another horse, and he also died. Caiise. — The disease was supposed to be connected with the food of the horses. All the oats had been consumed, and the lolium temulenturri, or awned darnel, had been given instead. It is said that the darnel is occa- THE MALIGNANT EPIDEMIC. Ziil Bionally used by brewers to give an intoxicating quality to tlieir malt liquor. For fifteen days no alteration of health was perceived, and then, m less than eighteen hours, nearly forty perished. The stables were not crowded, and there was no improper treatment. A man disinterred some of the horses to get at the fat ; swellings rapidly appeared in his throat, and he died in two days. A portion of their flesh was given to two piga and some dogs, and they died. ]\I. Brugnone found that bleeding only accelerated the death of the patient. He afterwards tried, and ineffectually, acids, cordials, purgatives, vesicatories, and the actual cautery ; and he frankly attributes to the power of natui'e the recovery of the few who survived. Gilbert's Account of the Epidemic of 1795. — M. Gilbert describes a malignant epidemic which appeared in Paris in 1795, characterised by dullness, loss of appetite, weakness, pulse at first rapid and full, and afterwards continuing rapid, but gradually becoming small, weak, and intermittent. The bowels at first constipated, and then violent purging succeeding. The weakness rapidly increasing, accompanied by foetid breath, and foetid evacuations. Tumours soon appeared about the limbs, under the chest, and in the head, the neck, and loins. If they suppurated and burst, the animal usually did well ; but otherwise he inevitably perished. The formation of these tumours was critical. If they rapidly advanced, it was considered as a favourable symptom ; but if they con- tinued obscure, a fatal termination was prognosticated. Bleeding, even in an early stage, seemed here also to be injurious, and increased the debility. Physic was given, and mild and nutritious food, gruel, and cordials. Deep incisions were made into the tumours, and the cautery appHed. Stimulating frictions were also used, but all were oi little avail. These cases have been narrated at considerable length, in order to give some idea of the nature of this disease, and because, with the exception of a short but veiy excellent account of the malignant epidemic in the last edition of Mr. Blane's 'Veterinary Outlines,' there will not be found any satisfactory history of it in the writings of our English veterinarians. It is evidently a disease of the mucous membranes, both the respiratory and digestive. It is accompanied by early and great debility, loss of all vital power, vitiation of every secretion, effusions and tumours everywhere, and it runs its course with fearfal rapidity. K it was seen at its outset, the practitioner would probably bleed ; but if a few hours only had elapsed^ he would find, with Messrs. Brugnone and Gilbert, that venesection would only hasten the catastrophe. Stimulants should be administered mingled with opium, and the spirit of nitric ether in doses of three or four ounces, with an ounce of laudanum. The quantity of opium should be regulated by the spasms and the diarrhoea. These medicines should be repeated in a few hours, combined, perhaps, with ginger and gentian. A pint of stout or hitter ale, or better still, when within reach, of good old port wine, given three or four times a day, has saved many an animal which otherwise would have sunk prostrated under the virulence of the disease. K these fail, there is little else to be done. Deep incisions into the tumours, or bhsters over them, might be proper measures ; but the prin- cipal attention should be directed to the arresting of the contagion. The diseased should be immediately removed from the healthy. All ofiensivo matter should be carefully cleared away, and no small portion of chloride of lime used in washing the animal, and particularly his ulcers. It might with great propriety be administered internally, while the stable, and everything that belonged to the patient, should undergo a careful ablution with the same powerful disinfectant. 282 BRONCHITIS. BEONCHITIS. TMs may be produced by several causes, such as sudden changes of temperature from hot to cold, and vice versa. Excitement as a result of over-exertion will sometimes cause it, but it is not generally a primary disease. That inflammation of the superior respiratory passages, con- Btituting catarrh, gradually creeps downwards and involves the larynx and the trachea, and at length, possibly, the farthest and the minutest ramifications of the air-tubes. When it is found to be thus advancing its progress should be carefully watched by the assistance of auscultation. The distant murmur of the healthy lung cannot be mistaken, nor the cre- pitating sound of pneumonia; and in bronchitis the blood may be heard filtering or breaking through the divisions of the lobuli, and accounting for that congestion or fiUing of the cells with mucus and blood, which is found after intense inflammation. Inflammation precedes this increased discharge of mucus. Even that may be detected. The inflamed mem- brane is thickened and tense. It assumes an almost cartilaginous struc- ture, and the murmur is not only louder, but has a kind of snoring sound. Some have imagined that a sound like a metallic ring is mingled with it ; but this is never very distinct. The interrupted whizzing sound has often and clearly indicated a case of bronchitis, and there are many corroborative symptoms which should be regarded. The variable temperature of the extremities wiU be an important guide — not intensely cold as in pneumonia, nor of increased temperature as often in catarrh, but with a tendency to coldness, yet this varying much. The pulse will assist the diagnosis. It will be quick, but feeble, from 70 to 80 per minute, — more rapid than in catarrh, much more so than in the early stage of pneumonia ; not so hard as in pleurisy, more so than in catarrh, and not oppressed as in pneumonia. The respiration should next be examined, abundantly more rapid than in catarrh, pneumonia, or pleurisy ; geaerally as rapid and often more so than the pulse, and accom- panied by a wheezing sound, heard at some distance. Mr. Percivall relates a case in which the respiration was more than one hundred in a minute. ^Ir. C. Percivall describes an interesting case in which the re- spiration was quick in the extreme ; and he remarks, that he does ' not remember to have seen a horse with his respiration so disturbed.' In addition to these clearly characteristic symptoms, will be observed a haggard countenance, to which the anxious look of the horse labouring under inflammation of the lungs cannot for a moment be compared ; also an evident dread of sufibcation, expressed, not by inabihty to move, as in pneumonia, but frequently an obstinate refusal to do so ; cough painful in the extreme ; breath hot, yet no marked pain in the part, and no looking at the side or flanks. As the disease proceeds there will be a short, frequent, pectoral cough, with considerable discharge from the nostrils, much more than in catarrh, because greater extent of membrane is affected. It will be muco-purulent at first, but vsdll soon become amber-coloured or green, or greyish green ; and that not from any portion of the food being returned, but from the peculiar hue of the secretion from ulcers in the bronchial passages. Small organised portions wiU mingle with the discharge, — shreds of mucus con- densed and hardened, and forced from the inside of the tube. K the disease proceeds, the discharge becomes bloody, and then, and sometimes earlier, it is foetid. The termination of this disease, if unchecked, is frequently pneu- monia. Although we cannot trace the air-tubes to their termination, the inflammation wiU penetrate into the lobuli, and afl'ect the PNEUMONIA. — INFLAMMATION OF THE LUNGS. 283 membranes of the air-cells or divisions which they contain. There is metastasis of inflammation oftener here than in pure pneumonia, and the disease is sometimes transferred to the feet. If, however, there is neither pneumonia nor metastasis of inflammation, and the disease pursues its course, the animal dies from suffocation. If the air-passages are clogged, there can be no supply of arteriahsed blood. If the inflammation be sub- dued, resolution may take place : but it far more frequently assumes a chronic form, giving rise to an imperfect state of breathing known as ' thick wind.' Like every other inflammation of the respiratory passages, bronchitis is at times epidemic. There is a disposition to inflammation in the respira- tory apparatus generally, but it depends on some unknown atmospheric influence whether this shall take on the form of catarrh, bronchitis, or pneumonia. It is not, however, contagious. This is a disease of the mucous, — and an extended mucous, — surface; and while our measures must be prompt, there is a tendency to debility which we should never forget : therefore bleeding should not be had recourse to. The medical attendant should be also cautious in the administration of purgatives, for the reasons that have again and again been stated : but if the bowels are evidently constipated, half a pint of oil may be given, and its speedy action promoted by injections, so that a small quantity may suffice. Sedatives should be employed, as 3i. to 5ij- of extract of bella- donna, in combination with spiadts of nitric ether and liquor ammonise acetatis. The animal should be placed in a warm, but well-ventilated stable, and the extremities kept warm by friction and flannel bandages. A bhster is always indicated in bronchitis. It can never do harm, and it not unfrequently aflbrds decided relief. It should extend over the brisket and sides, and up the trachea to the larynx. The food, if the horse is disposed to eat, should be mashes. No corn should be offered, nor should the horse be coaxed to eat. PNEUMONIA. INFLAMMATION OP THE LUNGS, The ultimate structure of the lungs has never till lately been satisfac- torily demonstrated. They appear, however, to be composed of minute cells or pouches, into which the air is conducted, and over the dehcate membrane constituting the divisions of which myriads of minute blood- vessels are ramifying. The blood is not merely permeating them, but it is undergoing a vital change in them ; there is a constant decomposition of the air, or of the blood, or of both ; and, during the excitement of exercise, that decomposition proceeds with fearful rapidity. Then it can readily be conceived that a membrane so deKcate as this mast be, in order that its interposition should be no hindrance to the arterialisation of the blood — so fragile also, and so loaded vrith blood-vessels — will be exceedingly subject to inflammation, and that of a most dangerous character. Inflammation of the substance of the lungs is the not unfrequent conse- quence of all the diseases of the respiratory passages that have been treated on. Catarrh, influenza, bronchitis, if neglected or badly managed, or sometimes in spite of the most skilful treatment, vrill spread along the mucous membrane, and at length involve the termination of the air- passages. At other times, there is pure pneumonia. The cellular texture is the primary seat of inflammation. It is often so in the over-worked horse. After a long and hard day's hunt, it is very common for horses to be attacked by pure pneumonia. A prodigiously increased quantity of blood is hurried through these small vessels, for the vast expenditui'e of arterial blood in rapid progress must be provided for. These minutest of the capillaries are distended and irritated, their contractile power is 284 PNEUMONIA. INFLAMMATION OF THE LUNGS. destroyed, inflammation is produced, mechanical injury is effected, the vessels ai-e ruptured, blood is poured into the interstitial texture, and congestion and intense inflammation, with all their train of fatal conse- quences, ensue. The following are the most frequent causes of pneumonia. A sudden transition from heat to cold ; a change from a warm stable to a cold one ; a neglect of the usual clothing ; a neglect even of some little comforts ; riding far and fast against a cold wind, especially in snowy weather ; loitering about when unusual perspiration has been excited; waitin(!e,ss of suppuration is set up, and proceeds until the contents of the cyst become again fluid, but of a different character, for they now consist of pus. This smooth defined collection of matter is called a vomica. The PNEUMONIA. — INFLAMAIATION OF THE LUNGS. 287 pus inci'eases ; the cyst becomes more and more distended ; it encroaches on the substance of the lungs ; it comes into contact with other vomicae, and the walls opposed to each other are absorbed by their mutual pressure ; they run together, and form one cyst, or regular excavation, and this sometimes proceeds until a considerable portion of the lung is, as it were, hollowed out. By and by, however, the vomicis press upon some bronchial passage ; the cyst gives way, and the purulent contents are poured into the bronchiae, and got rid of by the act of coughing. At other times the quantity is too great to be thus disposed of, and the animal is suffocated. Occasionally it will break through the pleuritic covering of the lung, and pour its contents into the thorax. Abscesses may form in the lungs undiscovered. — It is scarcely con- ceivable to what extent they sometimes exist in animals of slow work, without being detected by the usual means of examination. Mr. Hales says that he gave a physic ball to a cart-mare with a bad foot, and she soon afterwards died suddenly. When inquiring as to the cause of death, he was told, and not very good-humouredly, that his physic had killed her. He asked, if it had purged her violently? ' No!' it was repUed, ' it had not operated at all.' She was opened, and the mystery was all unravelled. The thorax was deluged with pus, and there were then in the lungs several large abscesses, one of which contained at least a quart of pus. The mare had not shown a symptom of chest affection, and the gentleman to whom she belonged declared that he had believed her to be as sound as any horso he had in his possession. The resolution or gradual abatement of inflammation is the termination most to be desired in this disease, for then the engorgement of the vessels will gradually cease, and the thickening of the membrane and the interstitial deposit be taken up, and the effusion into the cells likewise absorbed, and the lungs will gradually resume their former cellular texture, yet not perfectly ; for there will be some induration, slight but general ; or some more perfect induration of certain parts ; or the rupture of some of the air-cells ; or an irritability of membrane predisposing to renewed inflammation. The horse will not always be as usefal as before ; there may be chronic cough, thick wind, broken wind ; but these merit distinct consideration ; and, for the present, we proceed to the treatment of pneumonia. Our treatment will much depend upon the causes in operation producing the disease, and the progress it has made. If the animal be only in the early stage, every means should be adopted to encourage the circulation ; a diffusible stimulant, such as one or two ounces of the spirit of nitric ether combined with eight ounces of the liquor ammoniee acetatis, the ammonia being in excess, should be at once administered, a mustard liniment well rubbed on the bosom and sides, and great attention paid to keeping tho external surface of the body warm. If the symptoms of inflammation appear to increase by the pulse rising to seventy or eighty per minute, and the breathing being increased and laboured, more active treatment must be adopted. "We must bear in mind that there is inflammation of that organ through which all the blood in the frame passes — that organ most of all subject to congestion. Then nothing can be so important as to lessen the quantity of blood which the heart is endeavouring to force through the minute vessels of the lungs, distended, irritated, breaking. Immediate recourse must be had to the lancet, and the stream of blood must be suffered to flow on until the pulse falters, and the animal bears heavy upon the pail. The blood must be extracted as quickly as possible, aT.>d the lancet should be broad-shouldered and the orifice large. This is tne secret of treating inflammation of a vital organ. The disease ia i'88 PNEUMONIA. INFLAMMATION OF THE LUNGS. weakened or destroyed without permanently impairing the strength of the patient ; whereas by small bleedings, and with a small stream, the strength of the patient is sapped, while the disease remains untouched. From the debilitating form diseases of the respiratory system are apt to assume, many practitioners never resort to blood-letting in this disease, and there cannot be a doubt that it should be cautiously adopted, and only in those cases in which the attack is sudden and violent, and the animal's general condition in a state to bear it. In all cases of pneumonia resulting from influenza, fever, and other debihtating diseases, bleeding would only hasten a fatal termination. "When blood-letting is found necessary it should be copious, taken as rapidly as possible, and not repeated. Next comes purging, if we dared ; for by having recourse to it somo cause of excitement would be got rid of, the circulating fluid would be lessened, and a new determination of the vital current produced ; but experience teaches, that in pneumonia there is so much sympathy with th& abdominal viscera, — there is such a fatal tendency in the inflammation to spread over every mucous membrane, that purging is almost to a certainty followed by inflammation, and that inflammation bids defiance to every attempt to arrest it. It may be said -n-ith perfect confidence that, in the majority of cases, a dose of physic would be a dose of poison to a horse labouring under pneumonia. May we not relax the bowels ? Yes, if we can stop there. We may, after the inflammation has evidently a Httle subsided, venture upon, yet very cautiously, small doses of aloes in our fever medicine, and we may quicken their operation by frequent injections of warm soap and water ; omitting the purgative, however, the moment the fceces are becoming pul- taceous. We must, however, be assured that the inflammation is subsiding, and there must be considerable constipation, or the purgative had better be let alone. If we must not give physic, we must endeavour to find some other auxihary to the bleeding, and we have it in nitre, emetic tartar, the spirits of nitric ether, and the extract of helladonna, which has been so often recommended. The greatest care should be taken with the patient labouring under this complaint. His legs should be well hand-rubbed, in order to restore, if possible, the circulation to the extremities ; and a liniment composed of equal parts of water of ammonia, spiidts of turpentine, and soap liniment wiU materially assist this. Comfortable flannel bandages should encase the legs from the foot to the knee. He should be covered up warm. There cannot be a doubt about this. As for air, he cannot have too much. In cold weather his box must be airy, but not chilly. We want to detennine the blood to the extremities and the skin ; but not all the clothing in the world will keep our patient warm, if he is placed in a cold and uncom- fortable situation. As for food, we think not of it. In nine cases out of ten he will not touch anything ; or if he is inclined to eat, we give him nothing but a bran-mash, or a little green meat, or a few carrots. We now look about us for some counter-irritant. We wish to excite some powerful action in another part of the frame, and which shall divert the cui-rent of blood from that which was first afiected. We recognise it as a law of nature, and of which we here eagerly avail ourselves, that if we have a morbid action in some vital organ — and unusual determination of blood to it — Ave can abate, perhaps we can at once arrest, that morbid action by exciting a similar or a greater disturbance in some contiguous and not dangerous part. Therefore we blister the sides and the brisket, and produce all the irritation we can on the integument ; and in pro- PNEUMONIA. — INFLAMMATION OF THE LUNGS. 289 portion as we do so, we abate, or stand a chance of abating, the inflamma- tion within. We have recourse to a blister in preference to a seton ; and decidedly GO, for our stimulus can be spread over a laro^er surface, — there is more chance of its being applied to the immediate neighbourhood of the original inflammation — and most assuredly, from the extent of surface on which we can act, we can employ a quantity of stimulus beyond comparison greater than a seton would permit us to do. The first blister should be applied to the brisket ; the whole of the front of the chest, from the throat to well down between the fore-legs, should be included, and the bhster well rubbed in for at least ten minutes or a quarter of an hour. The result of this will be extensive swelling and bagging of the skin between the fore-legs, from the large effusion of serum that is poured out into the cellular tissue under the loose skin. One or two long setons, the entire depth of the chest, may be inserted at the same time, and become valuable drains for the effused fluid. The next day a blister, large and extensive, should be applied on each side of the chest, immediately behind the elbows, of at least a foot each in diameter. In the latter stage of disease the bhster will not act, because the powers of nature are exhausted. We must repeat it, — we must rouse the sinking energies of the frame, if we can, although the effort "will generally be fruitless. The not rising of a blister, in the latter stage of the disease, may too often be regarded as the precursor of death, especially if it ia accompanied by a hvid or broAvn colour of the membrane of the nose. Should the usual blisters fail to act, they should be washed ofi", and the tartar-emetic ointment well rubbed in in their place. This ointment, composed of a drachm of tartar emetic to an ounce of lard, will rouse the action of the skin when every other appHcation would be impotent. No case, indeed, should be allowed to proceed to a fatal termination, — the blisters having failed to operate, — without this powerful counter-iiTitant being had recourse to. Pneumonia, like bronchitis, requires anxious watching. The first object is to subdue the inflammation, and our measures must be prompt and decisive. The good which we can do must be done at first, or not at all. The commencement of the state of convalescence requires the same guarded practice as in bronchitis. As many horses are lost by impatience now, as by want of decision at first. If we have subdued the disease we should let well alone. We should guard against the return of the foe by the continued administration of our sedatives in smaller quantities, and give tonics if debihty is rapidly succeeding. When we have apparently weathered the storm, we must still be cautious ; we must consider the nature and the seat of the disease, and the predisposition to returning in- flammation. If the season will permit, two or three months' run at gi*ass shoidd succeed to our medical treatment ; but if this is impracticable, we must put ofi* the period not only of active work but of lengthened exercise as long as it can be delayed, and even after that permit the horse to return as gradually as may be to his usual employment and food. Most frequent in occurrence, in connection with inflammation of the lungs, is PLEURISY. This disease of the investing membrane of the lungs and of the thoracic cavity, namely the pleura, next deniands our attention. The prevailing causes of pleurisy are the same as those which produce pneumonia— exposure to wet and cold, sudden alternations of temperature, partial exposure to draughts of cold aii*, riding against a keen ^vind, V 290 PLEURLSY. immersion as high as the chest in cold water, and extra work of the respiratory machine. To these may be added — wounds penetrating into the thorax and lacerating the pleura, fracture of the ribs, or violent contu- sions on the side, the inflammation produced by which is propagated through the parietes of the chest. It is sometimes confined to one side or to one of the pleurae on either side, or even to patches on that pleura, whether pulmonary or costal. The inflammation of the lungs which occasionally accompanies rabies is cha- racterised by a singular patchy appearance. That produced on the costal pleura, arising from violence or other causes, rarely reaches the pulmonary covering ; and that which is communicated to the tunic of the lungs, by means of the intensity of the action within, does not often involve the costal pleura. In some cases, however, it aS"ect3 both pleurae and both sides, and spreads rapidly from one to the other. The first symptom is rigor, followed by increased heat and partial sweats; to these succeed loss of appetite and spirits, and a low and painful cough The inspiration is a short sudden efibrt, and broken off before it is fully accompUshed, indicating the pain felt from the distension of the irritable because inflamed membrane. This symptom is exceedingly characteristic. In the human being it is well expressed by the term stitcJi, and an exceed- ingly painful feehng it is. The expiration is retarded, as much as possible, by the use of all the auxihary muscles which the animal can press into the service, but it at length finishes abruptly in a kind of spasm. This pecu- liarity of breathing, once carefully observed, cannot be forgotten. The next character is found in the tenderness of the sides when the costal pleura is afiected. This tenderness often exists to a degree scarcely credible. If the side is pressed upon the horse will recede with a low painful grunt ; he will tremble, and try to get out of the way before the hand touches him again. The attempt to turn him short, or quickly round, will produce the same efi'ect. Then comes another indication, both of pain and the region of that pain, — the intercostal muscles afi'ected by the contiguous pleura, and in their turn afiBcting the panniculus camosus or subcutaneous muscular expansion "without — there are twitchings of the skin on the side — corrugations — waves creeping over the integument. This is never seen in pneumonia. There is however, as we may expect, the same disinclina- tion to move, for every motion must give intense pain. The pulse should be anxiously studied. It presents a decided diSerence of character from that of pneumonia. It is increased in rapidity, but instead of being oppressed, and sometimes almost unappreciable, as in pneumonia, it is round, full, and strong. Even at the last, when the strength of the constitution begins to yield, the pulse is wiry, although small. The extremities are never deathy cold ; they may be cool, they are oftener variable, and they sometimes present increased heat. The body is far more liable to variations of temperature ; and the cold and the hot fit more fre- quently succeed each other. The mouth is not so hot as in pneumonia, and the breath is rarely above its usual temperature. A difierence of character in the two diseases is here particularly evident on the membrane of the nose. Neither the crimson nor the purple injec- tion of pneumonia is seen on the lining of the nose, but a somewhat darker dingier hue. Both the pneumonic and pleuritic horse will look at his flanks, thus pointing out the seat of disease and pain ; but the horse with pneumonia ■will turn himself more slowly round, and long and steadfastly gaze at his side, while the action of the horse with pleurisy is more sudden, agitated, spasmodic. The countenance of the one is that of settled distress ; the other brightens up occasionally. The pang is severe, but it is transient, PLEURISY. 291 and tliere are intervals of relief. While neither will lie down or wiliingly move, and the pneumonic horse stands fixed as a statue, the pleuritic one shrinks and crouches almost to falling. K he hes do^vn it is on the affected side, when the disease is confined to one side only. The head of the horse, with inflammation of the substance of the lungs, hangs heavily — that of the other is protruded. We here derive most important assistance from Auscultation. In a case of pleurisy we have no crepitating crackling sound, referable to the infil- tration of the blood through the gossamer membrane of the air-cells ; we have not even a louder and distincter murmur. Perhaps there is no variation fi-om the sound of health, or, if there is any difference, the murmur is fainter ; for the pleural membrane is thickened and its elasticity is impaired, and the sound is not so readily transmitted. There is some- times a shght rubbing sound, and especially towards the superior region of the chest, as if there was friction between the thickened and indurated membranes. To this may be added the different character of the cough, sore and painful enough in both, but in pneumonia generally hard, and fall, and frequent. In pleurisy it is not so frequent, but faint, suppressed, cut short, and attended by a thin ichorous discharge dropping from the nose. These are sufiicient guides in the early stage of the disease, when it is most of all of importance to distinguish the one from the other. Pleurisy more frequently exists in a purer form than pneumonia, for every now and then death is the result solely of suffocation, but in most cases the struc- ture of the lungs is imphcated to a greater or less extent. If after a few days the breathing becomes a Httle more natural, the inspiration lengthened and regular, and the expiration, although still pro- longed, is suffered to be completed — if the twitchings are less evident and less frequent — if the cough can be fully expressed — if the pulse softens, although it may not diminish in frequency, and if the animal begins to He down, or walks about of his own accord, there is hope of recovery. But if the pulse quickens and, although smaller, yet possesses the wiry character of inflammation — if the gaze at the flanks, previously by starts, becomes fixed as well as anxious, and the difficulty of breathing continues (the difficulty of accoraplisJiing it, although the efforts are oftener repeated) — if patches of sweat break out, and the animal gets restless — paws — shifts his posture every minute — is unable longer to stand yet hesitates whether he shall he down — determines on it again and again, but fears, and at length drops rather than Hes gently down, a fatal termination is at hand. The most frequent cause of death is effusion iu the chest (hydrothorax), compressing the lungs on every side, rendering expu-ation difficult and at length impossible, and destroying the animal by suffocation. For some time before his death the efiusion and extent wiH be evident enough. The violence of the symptoms will suddenly abate, the pulse falHng from eighty or ninety to forty or fifty, and in some cases becoming softer in its character. The membranes also wiU assume a pale colour as the effusion increases. The animal not only walks unwillingly, but on the slightest exercise his pulse is strangely acelerated ; the feeling of suffocation comes over him, and he stops suddenly, looks wildly about, and trembles ; but he quickly recovers himself, and proceeds. There is frequently also, when the effusion is confirmed, oedema of some external part, and that occasionaUy to a very great extent. This is oftenest observed in the abdomen, the chest, and the point of the breast. The very commencement of efiusion may be detected by auscultation. There wiU be the cessation of the respiratory murmur at the sternum, and the increased grating — not tlie crepitating u2 '202 PLEUKISY crackling noise as when congestion is going on — not the febler murmur aa congestion advances, bub the absence of it, beginning from the bottom oi the chest. It is painfully interesting to watch the progress of the effusion — how the stillness creeps up, and the murmur gets louder above, and the grating sound louder too, until at length there is no longer room for the lungs to play, and suffocation ensues. The fluid contained ia the chest varies in quantity as well as appearance and consistence. Many gallons have been found in the two sacs, pale or yeUow or bloody, often difiering in the two sides or the thorax — occa- sionally a thick adventitious coat covering the costal or the pulmonary pleura — rarely much adhesion, but the lungs purple-coloured, flaccid, compressed, not one-fourth of their usual size, immersed iu the fluid, and rendered incapable of expanding by its pressure. Here, aa in pneumonia, the bleeding should be prompt and copious. Next, and of great importance, aperient medicine should be administered — that, the effect of which is so desii^able, but which we do not dare to give when the mucous membrane of the respiratory passages is the seat of disease. Here we have to do with a serous membrane, and there is less sympathy with the mucous membranes of either cavity. Small doses of aloes should be given with the usual fever-medicine, and repeated morning and night until the dung becomes pultaceous, when it will always be prudent to stop. The sedative medicine is that which has been recom- mended in pneumonia, and in the same doses. Next should follow a blister on the chest and sides. It is far preferable to setons, for it can be brought almost into contact with the inflamed sui-face, and extended over the whole of that surface. An airy, but a comfortable box, is likewise even more necessary than in pnetunonia, but the practice of exposure, uncovered, to the cold is both absurd and destructive. The blood, repelled from the skin by the contractile, depressing influence of the cold, would rash with fatal impetus to the neighbouring membrane, to which it was before dangerously determined. Warm and comfortable clothing cannot be dispensed with in pleurisy. The sedative medicines, however, should be omitted much sooner than in pneumonia, and succeeded by diuretics. The common turpentine is as good as any, made into a ball ^vith Hnseed-meal, and given in doses of two or three drachms t^vice in the day. If the constitution is much impaired, tonics may be cautiously given, as soon as the violence of the disease is abated. The spii'it of nitrous ether is a mild stimulant and a diuretic. Small quantities of gentian and ginger may be added, but the turpentine must not be omitted. There is in pleurisy a far greater tendency to relapse than in pneumonia. The lungs do not perfectly recover from their state of collapse, nor the serous membrane from its long maceration in the effused fluid : oedema, cough, disinchnation to work, incanability of rapid progression, colicky pains, as the unobservant practitioner would call them, but in truth pleuritic stitches — these are the frequent sequelae of pleurisy. This will afford another reason why the important operation of paracentesis should not be deferred too long. There is much greater disposition to metastasis than in pneumonia : in- deed, it is easy to imagine that the inflammation of a mere membrane may more readily and oftener shift than that of the substance of so large a viscus as the lungs. The inflammation, shifting its flrst ground, attacks almost every part indiscriminately, and appears under a strangely puzzling variety of forms. Dropsy is the most frequent change. Eflusion in the abdomen is substituted for that of the chest, or rather the exhalant or absorbent PHTHISIS rULMONALIS, OR CONSUMPTION. 293 vessels of the abdomen, or both of them, soon sympatliise in the debility of those of the thorax. Whe PHTHISIS PULMONALIS, OR CONSUMPTION. len describing the accompaniments and consequences of inflam- mation of the lungs in the horse, mention was made of this fatal complaint. It is nsiially connected with or the consequence of pneumonia or pleurisy, and especially in horses of a peculiar formation or temperament. K a narrow-chested, flat-sided horse is attacked with inflammation of the lungs, or severe catarrhal fever, experience tells us that we shall have more diSiculty in subduing the disease in him, than in one deeper in the girth or rounder in the chest. The lungs, deficient in bulk according to the diminished contents of the chest, have been overworked in supplying the quantity of arterial blood expended in the various purposes of life, and particularly that which has been required under unusual and violent exertion. Inflammation of the lungs has consequently ensued, and that inflammatory action has acquired an intense character under circum- stances by which another horse would be scarcely afiected. When this disease has been properly treated, and apparently subdued, the horse cannot be quickly and summarily dismissed to his work. He is sadly emaciated — he long continues so — his coat stares — his skin clings to his ribs — his belly is tucked up, notwithstanding that he may have plenty of mashes and carrots, and green meat and medicine — ^his former gaiety of spirit does not return, or if he is willing to work he is easily tired, sweating on the least exertion, and the sweat most profuse about the chest and sides — his appetite is not restored, or, perhaps, never has been good, and the slightest exertion puts him completely off his feed. We observe him more attentively, and even as he stands quiet in his stall, the flanks heave a little more laboriously than they should do, and that heaving is painfully quickened when sudden exertion is required. He coughs sorely, and discharges from the nose a mucus tinged with blood, or a fluid decidedly purulent — the breath becomes offensive — the pulse is strangely increased by the slightest exertion. When many of these symptoms are developed, the animal will exhibit considerable pain on being gently struck on some part of the chest ; the cough then becomes more frequent and painful ; the discharge from the nose more abundant and foetid, andihe emaciation and consequent debihty more rapid, until death closes the scene. The lesions that are presented after death are very uncertain. Gene- rally there are tubercles — sometimes very minute, at other times large in size. They are in different states of softening, and some of them, having suppurated, burst into the bronchial passages, and exhibit abscesses of enormous bulk. Other portions of the lungs are shrunk, flaccid, indurated or hepatised, and of a ^^ale or red-brown colour ; and there are occasional adhesions between the lungs and the sides of the chest. Is this an hereditary disease ? There is some difiiculty in deciding the point. It has been scarcely mooted among horsemen. One thing only is known — that the side has been flat, and the belly tucked up, and the animal has had much more ardour and willingness than physical strength. These conformations and tliis disposition we know to be hereditary, and thus far phthisis may be said to be so too. Low and damp situations, or a variable and ungenial climate, may render horses peculiarly susceptible of chest-affections. All the absurd or cruel or accidental causes of pneu- monia lay the foundation for phthisis ; and, particularly, those causes which tend to debilitate the frame generally, render the horse more liable to chest-affections, and less able to ward off their fatal consequences. The 294 CHRONIC COUGH, most iwimerous instances of phthisis occur in those poor persecuted animala that are worn-out before their time, and they are frequent enough among cavafry horses after the deprivations and fatigues of a long campaign. What is the medical treatment of confirmed phthisis ? The practitioaer must be guided by circumstances. K the horse is not very bad, and it is the spring of the year, a run at grass may be tried. It will generally seem to renovate the animal, but the apparent amehoration is too often treacherous. It should always be tried, for it is the best foundation for other treatment. The summer, however, having set in, the medicinal effect of the grass ceases, and the flies tease and irritate the animal. The medical treatment, if any is tried, should consist of counter-irritants ; they wiU rarely do harm. They should be applied in the form of blisters, extending over the sides, and thus brought as near as possible to the affected part. Sedative medicines should be perseveringly administered; belladonna should be given in small doses, and the strength of the constitution main- tained by a continued exhibition of tonic medicine. Nitre may be added as a diuretic, and pulvis antimoniahs as a diaphoretic. The tonic effect of mild and nutritious food — green meat of almost every kind (carrots particularly), mashes, and now and then a malt mash — will be found of great service. Nothing further than this ? We may try, but very cautiously, those tonics which stimulate the digestive system yet comparatively little affect the circulatory one. Small doses of ginger and gentian may be given, but should be carefully watched, and omitted if the flanks should heave more, or the cough be aggravated ; but the safest tonic that can be had recourse to is the sulphate of iron, commonly known as green vitriol ; half an ounce of this may be given, dissolved in the water, morning and evening. The treatment of phthisis is a most unsatisfactory subject of considera- tion as it regards the practice of the veterinarian. K after the human being has been subjected to medical treatment, for a long course of time and at very considerable expense, he so far recovers that Hfe is rendered tolerably comfortable to him, he and his connections are thankfal and satisfied, and he will submit to many a privation in order to ward off the return of a disease, to which he is conscious there will ever be a strong predisposition ; but the case is different with the horse, and this, the scope and bound of the human practitioner's hope, is worthless to the veterinarian. His patient must not only live but must be sound again. Every energy, every capability, must be restored. Can we cause the tubercles to be absorbed ? Can we disperse or dispel the hepatisation ? Can we remodel the disorganised structure of the lungs ? Our considera- tion, then, will be chiefly directed to the detection of the disease in its earliest state, and the allaying of the irritation which causes or accom- panies the growth of the tubercles. This must be the scope and bound of the veterinarian's practice — always remembering that the owner should be forewarned of the general hopelessness of the case, and that the con- tinuance of his efforts should be regulated by the wish of the proprietor and the value of the patient. CHRONIC COUGH. It would occupy more space than can be devoted to this part of our subject to treat of all the causes of obstinate cough. The irritability of so great a portion of the air-passages, occasioned by previous and violent inflammation of them, is the most frequent. It is sometimes connected with worms. There is much sympathy between the lungs and the intes- tines, and the one readily participates in the irritation produced in the CHRONIC COUGH. 295 otlier. That it is caused by glanders can be easily imagined, because that disease is, in its early stage, seated in or near the principal air-passages, ' and little time passes before the lungs become affected. It is the necessary attendant of thick- wind and broken-mnd, for these proceed from altera- tions of the structure of the lungs. Notwithstanding the clearness of the cause, the cure is not so evident: If a harsh hollow cough is accompanied by a staring coat and the appearance of worms, a few worm-balls may expel these parasites, and remove the irritation of the intestinal canal. If it proceeds from irrita- bihty of the air-passages — which will be discovered by the horse coughing after drinking, or when he first goes out of the stable in the morning, or by his occasionally snorting out thick mucus from the nose — medicines may be given, and sometimes with advantage, to diminish irritation gene- rally. Small doses of belladonna, or tartar emetic, and nitre, adminigtered every night, frequently have a beneficial effect. These balls should, if necessary, be regularly given for a considerable time ; they are sufficiently powerful to quiet slight excitement of this kind, but not to nauseate the horse, or interfere with his food or his work. A blister, extending from the root of one ear to that of the other, taking in the whole of the chan- nel, and reaching six or eight inches down the windpipe, has been tried, and often with good effect, on the supposition that the irritation may exist in the fauces or the larynx. The blister has sometimes been extended through the whole course of the windpipe, until it enters the chest. Feeding has much influence on this complaint. Too much dry meat, and especially chaff", increases it. It is aggravated when the horse is suffered to eat his litter, and it is often reheved when spring-tares are given. Carrots afford decided relief. The seat of the disease, however, is so uncertain, and all our means and appHances so inefficacious, and the cough itself so little interfering, and sometimes interfering not at all, with the health of the animal, that it is scarcely worth while to persevere in any mode of treatment that is not evi- dently attended with benefit. The principal consideration to induce us to meddle at all with chronic cough is the knowledge that horses afflicted with it are more liable than others to be affected by changes of tempera- ture, and that inflammation of the lungs, or of the respiratory passages, often assumes in them a very alarming character ; to which may be added, that a horse with chronic cough cannot be warranted sound. When chronic cough chiefly occurs after eating, the seat of the disease is evidently in the substance of the lungs. The stomach distended with food presses upon the diaphragm, and the diaphragm upon the lungs ; and the lungs, already labouring under some congestion, are less capable of transmitting the air. In the violent effort to discharge their function, irritation is produced, and the act of coughing is the consequence of that irritation. The Veterinary Surgeon labours under great disadvantage in the treat- ment of his patients. He must not only subdue the malady, but he must remove all its consequences. He must leave his fatient perfecth/ sotmd, or he has done comparatively nothing. This is a task always difficult and sometimes impossible to be accomplished. The two most frequent conse- quences of severe chest-affections in the horse are recognised under the terms thick-wind and hrolcen-wind. The breathing is hurried in both, and the horse is generally much distressed when put upon his speed ; but it is simply quick breathing in the first, ^vith a peculiar sound like half-roarimg — the inspirations and expirations being rapid, forcible, but equal. In the second the breathing is also hurried, but the inspiration does not differ materially from the natural one, while the expiration is difficult, or doubly 296 THICK-WIND. laborious. The changes of structure which accompany these states of morbid respiration are as opposite as can be imagined. Induration of the substance of the lungs, diminution of the number or the caliber of the air-passages, are the causes of thick-wind. If the portion of lung employed is lessened, or the bronchial tubes will not admit so much air, the quick succession of efforts must make up for the diminished effect produced by each. In broken-wind there is rupture of the air-cells, and an unnatural intercommunication between them in the same lobule, or between those of the neighbouring lobuli. The structure of the lung, and the discharge of function, and the treatment too, being so different, these diseases require separate consideration. THICK-WIND. When treating of pneumonia, it was observed, that not only are the vessels which ramify over the delicate membrane of the air-cells gorged with blood, but they are sometimes ruptured, and the cells are filled with blood. The black, softened, pulpy appearance of the lungs thus produced, is the rottenness of the groom and farrier, proving equally the intensity of the inflammation and that it is of recent date. K the horse is not speedily destroyed by this lesion of the substance of the lungs, the serous portion of the effused blood is absorbed, and the solid becomes organised. The cells are obliterated, and the lung is hepatised, — ^its structure bears consi- derable resemblance to that of the liver. This may occur in patches, or it may involve a considerable portion of the lung. If a portion of the lung is thus rendered impervious, the remainder will have additional work to perform. The same quantity of blood must be supplied with air ; and if the working part of the machine is diminished, it must move with greater velocity as well as force — the respiration must be quicker and more laborious. This quick and laboured breathing can be detected even when the animal is at rest, and it is indicated plainly enough by his sad distress when he is urged to unusual or con- tinued speed. The inspirations and the expirations are shorter as well as more violent — the air must be more rapidly admitted and more thoroughly pressed out, and this is accompanied by a peculiar soimd that can rarely be mistaken. We may guess at the commencement of the evil by the laborious heav- ing of the flanks, but by auscultation alone can we ascertain its progress. The iiacrease of the crepitus will tell us that the mischief is beginning, and the cessation of the murmur will clearly mark out its extent. The inflammatory stage of the disease having passed, and comparative health being restored, and some return to usefulness having been estab- lished,— the horse being now thicl--winded, auscultation will be far more ■valuable than is generally imagined. It will faithfully indicate the quantity of hepatisation, and so give a clue to the degree of usefulness, or the extent to which we may tax the respiratory system ; and it vnJl also serve to distinguish, and that very clearly, between the cause of thick- loind, and the morbid changes that may have resulted from bronchitis, or thickening of the parietes of the air-passages, and not the obliteration of the air-cells. Of the Treatment little can be said. We know not by what means we can excite the absorbents to take up the solid organised mass of hepatisa- tion, or restore the membrane of the cells and the minute vessels ramify- ing over them, now confounded and lost. We liave a somewhat better chance, and yet not much, in removing the thickening of the membrane ; for counter-irritants, extensively and perseveringly applied to the external parietes of the chest, may do something. If thick' wind io^mediately BROKEN-WIND. 297 followed bronclutis, it would certainly be justifiable practice to blister the brisket and sides, and that repeatedly ; and to administer purgatives if we dared, or diui-etics, more efi'ectual than the purgatives and always Our attention must be principally confined to diet and management. A thick-winded horse should have his full proportion, or rather more than his proportion, of corn and beans, and a diminished quantity of less nutri- tious food, in order that the stomach may never be overloaded, and press upon the diaphi-agm, and so upon the lungs, and increase the labour of these already overworked organs. Particular care should be taken that the horse is not worked immediately after a full meal ; the overcoming of the pressure and weight of the stomach will be a serious addition to the extra work which the lungs already have to perform from their altered structure. Something may be done in the palliation of thick- wind, and more than has been generally supposed, by means of exercise. If the thick-winded horse is put, as it were, into a regular system of training — if he is daily ex- ercised to the fair extent of his power, and without seriously distressing him, his breathing will become freer and deeper, and his wind will ma- terially improve. We shall call to our aid one of the most powerful excitants of the absorbent system — pressure, that of the air upon the tube — the working part of the lung upon the disorganised; and adjusting this so as not to excite irritation or inflammation, we may sometimes do won- ders. This is the very secret of training, and the power and the dura- bility of the hunter and the racer depends entirely upon this. Thick- wind, however, is not always the consequence of disease. There are certain cloddy round-chested horses that are naturally thick- winded, at least to a certain extent. They are capable of that slow exertion for which nature designed them, but they are immediately distressed if put a little out of their usual pace. A circular chest, whether the horse is large or small, indicates thick-mnd. The circular chest is a capacious one, and the lungs which fill it are large ; and they supply sufficient arterialised blood to produce plenty of flesh and fat, and these horses are always fat. This is the point of proof to which we look when all that we want from the animal is flesh and fat ; but the expanding form of the chest is that which we require in the animal of speed — the deep as well as the broad chest — always capacious for the purpose of muscular strength, and becom- ing considerably more so when arteriahsed blood is rapidly expended in quick progression. We cannot enlarge the capacity of a circle ; and if more blood is to be furaished, that which cannot be done by increase of surface must be accomplished by frequency of action. Therefore it is that many of our heavy draught-horses are thick- winded. It is of httle detri- ment to them, for their work is slow — or rather it is an advantage to them ; for the circular chest, always at its greatest capacity, enables them to acquii^e that weight which is so advantageous for them to throw into the collar. BROKEN-WIND. This is immediately recognisable by the manner of breathing. The in- spiration is performed in somewhat less than the natural time, and Avithoul an increased degree of labour : but the expiration has a peculiar difficulty accompanying it. It is accomplished by a double efibrt, in the first of. which, as Mr. Blaine has well explained it, ' the usual muscles operate : and in the other the auxiliary muscles, particularly the abdominal, are put on the stretch to complete the expulsion more perfectly ; and, that being done, the flank falls, or the abdominal muscles relax with a kind of ierk or spasm.' 298 BROKEN-WIND. The majority of veterinary surgeons attribute broken- wind to an emphy • sematous state of the lungs. In almost every broken- winded horse which has been examined after death, there has been found dilatation of some of the air-cells, and particularly towards the edges of the lobes. There has been rupture through the parietes of some of the cells, and they have evidently communicated with one another, and the air could be easily forced from one portion of the cells to another. There was also a cre- pitating noise while this pressure was made, as if the attenuated membrane of some of the cells had given way. These were the true broken cells, and hence the derivation of the name of the disease. Broken-wind is preceded or accompanied by cough — a cough perfectly .characteristic, and by which the horseman would, in the dark, detect the existence of the disease. It is short, suppressed, and hollow, increased when the animal is feeding, or exposed to variations of temperature. When the animal is suddenly struck or threatened, there is a low grunt of the same nature as that of roaring, but not so loud. Broken- wind is usually preceded by cough ; the cough becomes chronic, leads on to thick- wind, and then there is but a step to broken-wind. It is the consequence of the cough which accompanies catarrh and bronchitis oftener than that attending or following pneumonia, and of inflammation and, probably, thickening of the membrane of the bronchiae, rather than of congestion of the air-ceUs, Laennec, whose illustrations of the diseases of the chest are invaluable to the human surgeon, comes to our assistance, and, while describing em- physema of the lungs of the human being, gives us an expHcation of broken- wind more satisfactory than is to be found in any of our veteri- nary writers. He attributes what he calls dry catarrh ' to the partial ob- struction of the smaller bronchial tubes, by the swelling of their inner m.embrane. The muscles of inspiration are numerous and powerful, while expiration is chiefly left to the elasticity of the parts ; then it may happen that the air, which during inspiration had overcome the resistance opposed to its entrance by the tumid state of the membrane, is unable to force its way through the same obstacle dui'ing expiration, and remains imprisoned in the cells, as it were, by a valve. The succeeding inspirations introduce a fresh supply of air, and gradually dilate the cells to a greater or less extent ; and if the obstruction is of some continuance, the dilated condi- tion of the cells becomes permanent.' Emphysema, or dilatation or rupture of the tissues of the lungs, is of two descriptions : in one, termed vesicular emphysema, the air-cells or vesicles which receive the air in the act of inspiration alone are afiected ; they may be dilated, enlarged, each separate cell, but when the vacant space is of considerable size, it is the result of the union of several air- cells broken into one by the stretching or destruction of the partitions that naturally divide and isolate them — in the other, termed the puhno- nary or interlobular emphysema, the air-cells are ruptured, and the air escapes into the cellular tissue which connects them, the cells being dis- tended by a full inspiration ; and the air being unable easily to escape through the obstructed air-tubes, a strong efibrt at expiration is made, a rupture takes place, and forms a communication between the air-cells and the cellular tissues. This interlobular effusion of air may take place in a few minutes or seconds, while the vesicular emphysema, or that limited to the air- vesicles only, is slow and gradual, their permanent dilatation being the work of time ; in both descriptions the emphysematous portion of the lung is paler, drier, and lighter than the rest, for the air being shut up in these portions, they do not subside, as the adjoining portions do, when loft to their own elasticity, and in consequence of this they possess BROKEN-AVIXD. $99 fewer capillary bloodvessels, less blood, and consequently less moisture — they are dry and light, and float upon water like a bladder filled with air. Broken-wind may be the result of either of these states : when it comes on slowly, following an attack of bronchitis, and consequent thick- wind, it is owing to the overloaded air-cells pressing on, breaking down, and coalescing with each other ; when it is developed suddenly, it depends on a rupture of the air-cells into the areolar tissue from some very severe exertion, and the result is sudden and immediate. Some circumstances attending this disease may now, probably, be ac- counted for. A troublesome cough, and sometimes of long continuance, is the foundation of the disease, or indicates that irritable state of the bronchial membrane with which broken- wind is almost necessarily as- sociated. Horses that are greedy feeders, or devour large quantities of slightly nutritious food, or are worked with a stomach distended by this food, are very subject to broken-wind. More depends upon the manage- ment of the food and exercise than is generally supposed. The post-horse, the coach-horse, and the racer are comparatively seldom broken- winded. They are fed, at stated periods, on nutritious food that lies in Httle com- pass, and their hours of feeding and of exertion are so arranged that they seldom work on a full stomach. The agricultural horse is too often fed on the very refuse of the farm, and his hours of feeding and of work are frequently irregular ; and the carriage-horse, although fed on more nutritious food, is often summoned to work by his capricious master the moment his meal is devoured. A rapid gallop on a fall stomach has often produced broken-wind. When the exertion has been considerable and long- continued, we can easily conceive a rupture of the air-cells of the soundest lungs ; but we are inclined to believe, that were the history of these cases known, there would be found to have been a gradual preparation for this result. There would have been chronic cough, or more than usually disturbed respiration after exercise, and then it required little more to perfect the mischief. Galloping after drinking has been censured as a caus'e of broken- wind, yet we cannot think that it is half so dangerous as galloping with a stomach distended by soHd food. It is said that broken- winded horses are foul feeders, because they devour almost everything that comes in their way, and thus impede the play of the lungs ; but there is so much sym- pathy between the respiratory and digestive systems, that one cannot be much deranged without the other evidently suffering. Flatulence and a depraved appetite may be the consequence as well as the cause of broken- wind ; and there is no pathological fact of more frequent occurrence than the coexistence of indigestion and flatulence with broken- wind. Flatu- lence seems so invariable a concomitant of broken- wind, that the old farriers used to think the air found its way from the lungs to the abdomen in some inexplicable manner, and hence their ' holes to let out broken- wind ; ' they used literally to make a hole near to or above the funda- ment in order to give vent to the imprisoned wind. The sphincter muscle was generally divided ; and although the trumping ceased, there was a constant although silent emission of foetid gas, that made the remedy worse than the disease. Young horses are seldom found the subject of broken- wind, but there is no class amongst which it is so prevalent as aged horses employed for agricultural purposes. In these animals it usually comes on gradually, and can generally be traced to a paralysed condition of thepneumogastric uerve. It may therefore be considered as primarily a disease of the diges- tive organs, depending upon the indigestible nature of the food, and the Regular manner in which these animals are fed. There can be little boo IHE HEART. doubt that amongst all horses, especially those last mentioned, broken- wind is to a certain extent hereditary. Is there any cure for broken-wind ? None ! no medical skill can repair the broken-down structure of the lungs. If, however, we cannot cure, we may in some degree palliate broken- wind : and, iirst of all, we must attend carefully to the feeding. The food should he in Httle compass, — plenty of oats and spht beans, with a mode- rate allowance of chaff. Hay is objectionable, from the rapidity with whicli il is usually devoured, and the stomach overdistended. Water should be given in moderate quantities, but the horse should not be suffered to drink as much as he likes until the day's work is over. Green meat will always be serviceable. Carrots are particularly useful ; they are readily digested, and appear to have a peculiarly beneficial effect on the respiratory system. It is from the want of proper attention to the feeding that many horses become broken- winded even in the straw-yard. There is little nutriment in the provender which they find there ; and in order to obtain enough for the support of life, they are compelled to keep the stomach constantly full, and pressing upon the lungs. It has been the same when they have been turned out in coarse and innutritive pasturage. The stomach was perpetually gorged, and the habitual pressure on the lungs cramped and confined their action, and inevitably ruptured the cells when the horse gambolled -with his companions, or was wantonly driven about. Next in importance stands exercise. The broken- winded horse should not stand idle in the stable a single day. It is almost incredible how much may be done by attention to food and exercise. The broken- winded horse may thus be rendered comfortable to himself, and no great nuisance to his owner ; but inattention to feeding, or one hard journey, — the animal unprepared, and the stomach full, — may bring on inflammation, congestion, and death. Occasional physic, or alterative medicine, will often give considerable relief. THE HEART. The heart is placed between a doubhng of the pleura — the mediastinum, by means of which it is supported in its natural situation, and all danger- ous friction between these important organs is avoided. It is also sur- rounded by a membrane or bag of its own, called the pericardium, whose office is of a similar nature. By means of the heart the blood is circulated through the frame. It is composed of four cavities — two above, called auricles, from their supposed resemblance to the ear of a dog ; and two below, termed ventricles, occupying the substance of the heart. In point of fact, there are two hearts — the one on the left side impelling the blood through the frame, the other on the right side through the jaulmonary system ; but, united in the manner in which they are, their junction contributes to theii' mutual strength, and both circulations are carried on at the same time. The first is the arterial circulation. No function can be discharged, life cr-rnot exist, without the presence of arterial blood. The left ventricle that contains it contracts, and by the power of that contraction, aided by other means, which the limits of our work will not permit us to describe, the blood is driven through the whole arterial circulation — the capillaiy vessels and the veins — and returns again to the heart, but to the right ventricle. The other division of this viscus is likewise employed in cir- culating the blood thus conveyed to it, but not the same fluid which was contained in the left ventricle. It has gradually lost its vital power as it has passed along ; it has changed from a bright to a dark red, and from a vital to a poisonous fluid. Ere it can again convey the principle of nutri- DISEASES OF THE HEART. 301 tion, or give to each organ tliat impulse or stimulus whicli enables it to discharge its liinction, it must be materially changed. When the right ventricle contracts, and the blood is di-iven into the lujigs, it passes over the gossamer membrane of -which the lobules of the lungs have been described as consisting ; these lobules being tilled with the air which has descended through the bronchial tubes in the act of in- spiration. This deHcate membrane permits some of the principles of the air to permeate it. The oxygen of the atmosphere combines with a portion of the superabundant carbon of this blood, and the expired air is poisoned with carbonic-acid gas. Some of the constituents of the blood attract a portion of the oxygen of the air, and obtain their distinguishing character and properties as arterial blood ; and being thus revivified, it passes on over the membrane of the lobes, unites into small and then larger vessels, and at length pours its full stream of arterial blood into the left auricle, thence to ascend into the ventricle and to be diffused over the frame. DISEASES OF THE HEART. It may be readily supposed that an organ so complicated is subject to disease. It is so to a fearful extent, and it sympathises with the maladies of every other part. Until lately, however, this subject has been shamefully neglected, and the writers on the veterinary art have seemed to be unaware of the importance of the organ, and the maladies to which it is exposed. The owners of horses and the vetei"inary profession generally are deeply indebted to Percivall in his ' Hippopathology' and to the pages of ' The Veterinarian' (vol. vi.) for much valuable information on this subject. To Dr. Hope also, and particularly to Laennec, we owe much, Mr. Percivall well says, ' This class of diseases may be regarded as the least advanced of any in veterinary medicine — a cii'cumstance not to be ascribed so much ■ to their comparative rarity, as to their existing undiscovered, or rather being confounded during life with other disorders, and particularly with pulmonary affections.' The best place to examine the beating of the heart is immediately behind the elbow, on the left side. The hand applied flat against the ribs will give the number of pulsations. The ear thus applied will enable the practitioner better to ascertain the character of the pulsation. The stethoscope affords an uncertain guide, for it cannot be flatly and evenly applied. Pericarditis. — The bag, or outer investing membrane of the heart, is liable to inflammation, in which the effused fluid becomes organised, and deposited in layers, increasing the thickness of the pericardium, and the difficulty of the expansion and contraction of the heart. The only symptoms on which dependence can be placed are — a quickened and irre- gTilar respu-ation ; a bounding action of the heart in an early stage of the disease, but that, as the fluid increases and becomes concrete, assaming a feeble and fluttering character. Hydrops Pericardii is the tei-m used to designate the presence of the fluid secreted in consequence of this inflammation, and varpng from a pint to a gallon or more. In addition to the symptoms already described, there is an expression of alarm and anxiety in the countenance of tlie animal which no other malady produces. The horse generally sinks from other disease, or from constitutional irritation, before the cavity of the pericardium is filled ; or if he lingers on, most dreadful palpitations and throbbiugs accompany the advanced stage of the diseaae. It is seldom or never that this disease exists alone, but is combined with dropsy of the chest or abdomen. 302 DISEASES OF THE HEART. Carditis is the name given to inflammation of tlie muscular substance of the heart. A well-authenticated instance of inflammation of the sub- stance of the heart does not stand on record. Some other organ proves to be impHcated in the mischief, even when the disturbance of the heart has been most apparent. Inflammation of the Lining of the Heart. — Mr. Simpson relates, in ' The Veterinarian ' for 1834, a case in' which there were symptoms of severe abdominal pain ; the respiration was much disturbed, and the action of the heart took on an extraordinary character. Three or four beats succeeded to each other, so violently as to shake the whole frame, and to be visible at the distance of several yards, with intervals of quietude of five minutes or more. At length this violent beating became constant. On dissection both lungs were found to be inflamed, the serum in the pericardium increased in quantity, and the internal membrane of the heart violently inflamed, with spots of ecchymosis. This would seem to be a case of inflammation of the heart ; but in a considerable proportion of the cases of rabies, these spots of ecchymosis and this general inflammation of the heart are seen. Hypertrophy is an augmentation or thickening of the substance of the heart ; and, although not dreamed of a few years ago, seems now to be a disease of no rare occurrence among horses. The heart has been known to acquire double its natural volume, or the auricle and ventricle on one side have been thus enlarged. Mr. Thomson relates in ' The Ve- terinarian ' a very singular case. A horse was brought with every appearance of acute rheumatism, and was bled and physicked. On the following day he was standing, with his fore-legs widely extended, the nostrils dilated, the breathing quick and laborious, the eyes sunk in their orbits, the pupils dilated, his nose turned round almost to his elbow, sighing, and his countenance showing approaching dissolution. The pulse had a most irregular motion, and the undulation of the jugular veins was extending to the very roots of the ears. He died a few hours afterwards. The lungs and pleui'a were much inflamed ; the pericardium was in- flamed and distended by fluid ; the heart was of an enormous size and greatly inflamed ; both the auricles and ventricles were filled with coagu- lated blood ; the greater part of the chordge tendineae had given way ; the valves did not approximate to perform their function, and the heart alto- gether presented a large disorganised mass, weighing thirty-four pounds. The animal worked constantly on the farm, and had never been put to quick or very laborious work. Dilatation is increased capacity of the cavities of the heart, the parietes being generally thinned. It is probable that this is a more fre- quent disease than is generally supposed ; and from the circulating power being lessened, or almost suspended, on account of the inability of the cavities to propel their contents, it is accompanied by much and rapid emaciation. In the Gardens of the Zoological Society of London this is a disease considerably frequent, and almost uniformly fatal. It attacks the smaller animals, and particularly the quadrumana, and has been found in the deer and the zebra. It is characterised by slow emaciation, and a piteous expression of the countenance ; but the mischief is done when these symptoms appear. Ossification of the Heart. — There are too many instances of this both in the right and the left auricles of the heart, the aortic valves, the abdominal aorta, and also the bronchial and other glands. Mr. Percivall observes of one of these cases, that ' the cavity could have been but a THE ARTERIES. THE VEINS. »(Vi passive receptacle for the blood, and the current must have been continued vrithoiit any or with hardly any fresh impulse.' Of air ih thf heart destroying the horse there are some interesting accounts ; and also of rupture of the heart, and aneurism, or dilatation of the aorta, both thoracic and abdominal, and even farther removed from the heart and in the ihac artery. The symptoms that would certainly indicate the existence of aneurism are yet unknown, except tenderness about the loins and gradual inability to work are considered as such : but it is interesting to know of the existence of these lesions. Ere long the vete- rinary surgeon may possibly be able to guess at them, although he vrill rarely have more power in averting the consequences of aneurism than the human surgeon possesses with regard to his patient. This will be the proper place to describe a Httle more fully the circula- tion of the blood, and various circumstances connected with that mosii important process. THE ARTEEIES. The vessels which carry the blood from the heart are called arteries {heeping air, — the ancients thought that they contained air). They are composed of three coats : the outer or elastic is that by which they are enabled to yield to the gush of blood, and enlarge their dimensions as it is forced along them, and by which also they contract again as soon as the stream has passed ; the middle coat is a muscular one, by which this con- traction is more powerfally performed, and the blood urged on in its course ; the inner or membranous coat is the mere lining of the tube. The arteries divide as they proceed through the frame, and branch out into innumerable minute tubes, termed capillaries (hair-hke tubes), and they even become so small as to elude the sight. The slightest puncture cannot be inflicted without wounding some of them. In these Httle tubes the nourishment of the body and the separation of all the various secre- tions is performed, and in consequence of this the blood is changed. When these capillaries unite together, and begin to enlarge, it is found to be no longer arterial or of a florid red colour, but venous, or of a blacker hue ; therefore the principal termination of the arteries is in the veins. The point where the one ends and the other commences cannot be ascertained. It is when the red arterial blood, having discharged its function by depositing the nutritious parts, is changed to venous or black blood. THE VEINS. These vessels carry back to the heart the blood which had been conveyed to the different parts by the arteries. They have the same number of coats as arteries, but are thin and comparatively weak. They are more numerous and much larger than the arteries, and consequently the blood, lessened in quantity by the various secretions separated from it, flows more slowly through them. It is forced on partly by the first impulse commu- nicated to it by the heart, also in the extremities and external poi-tions of the frame, by the pressure of the muscles ; and in the cavity of the chest, its motion is assisted or principally caused by the sudden expansion of the ventricles of the heart, after they have closed upon and driven out their contents, and thereby causing a vacuum which the blood rushes on to fill. There are curious valves in various parts of the veins, which pre- vent tho blood from fiowing; backward to its source. a()4 THE PULSE. THE PULSE Is caused by tlie yielding of the coats of the artery to the gush of blood forced into it by the contraction of the heart. It is a very useful assistant to the practitioner of human medicine, but much more so to the veterinary sui'geou, whose patients cannot describe either the seat or degree of ail- ment or pain. The number of pulsations in any artery wiil give the number of the beatings of the heax^t, and so express the ia-ritation of that organ, and of the frame generally. In a state of health, the heart beats in a horse from about thirty-two to thirty-six times in a minute. This is said to be the standard pulse — the pulse of health. It varies singularly Httle in horses of the same size and breed, and where it beats naturally there can be little materially wrong. The most convenient place to feel the pulse is at the lower jaw (p. 199) a little behind the spot where the sub- maxillary artery and vein and the parotid duct come from under the jaw. There the number of pulsations will be easily counted, and the character of the pulse, a matter of fully equal importance, will be clearly ascertained. Many horsemen put the hand to the side. They can certainly count the pulse there, but they can do nothing more. We must be able to press the artery against some hard body, as the jawbone, in order to ascertain the manner in which the blood flows through it, and the quantity that flows. When the pulse reaches fifty or fifty-five, some degree of fever may be apprehended, and proper precaution should be taken ; seventy or seventy- five will indicate a dangerous state, and put the owner and the surgeon not a little on the alert. Few horses long survive a pulse of one hun- dred, for by this excessive action the energies of nature are speedily worn out. Some things, however, should be taken into account in forming our con- clusion fi'om the frequency of the pulse. Exercise, a warm stable, and fear will wonderfully increase the number of pulsations. In the preg- nant condition of the mare the pulse will also be found increased. When a careless brutal fellow goes up to a horse, and speaks hastily to him, and handles him roughly, he adds ten beats per minute to the pulse, and vnll often be misled in the opinion he may form of the state of the animal. A judicious person will approach the patient gently, and pat and soothe him, and even then probably the circulation will be a Httle dis- turbed. He should take the additional precaution of noting the number and quality of the pulse a second time before he leaves the animal. If a qtoick pulse indicate irritation and fever, a slow pulse will likewise characterise diseases of an opposite description. It accompanies the sleepy stage of staggers, and every malady connected with deficiency of nervous energy. The i'part may not only be excited to more frequent but also to more violent action. It may contract more powerfully upon the blood, which will be driven with greater force through the arteries, and the expansion of the vessels will be greater and more sudden. Then we have the hard pulse, the sure indicator of considerable fever. Sometimes the pulse may be hard and jerking, and yet small : the stream though forcible is not great. The heart is so ii^ri table that it con- ' tracts before the ventricle is properly filled. The practitioner knows that this indicates a dangeroiis state of disease. It is an almost invariable accompaniment of inflammation of the bowels. A iveaJc pulse, when the arterial sti'eam flows slowly, is caused by the feeble action of the heart. It is the reverse of fever, and expressive of debility. INFL.aiMATION. 305 The oppressed pulse is wlien the arteries seem to be fully distended with blood. There is obstruction somewhere, and the action of the heart can hardly force the streaia along, or communicate pulsation to the current. It is the case in sudden congestion of the lungs. They are overloaded and gorged with blood which cannot find its way through their minute vessels. This accounts for the well-known fact of a copious bleeding in- creasing a pulse previously oppressed. A portion being removed from the distended and choked vessels, the remainder is able to flow on. There are many other varieties of the pulse, which it would be tedious here to particularise ; it must, however, be observed, that during the act of bleeding, its state should be carefully observed. ]\Iany veterinary sur- geons, and gentlemen too, are apt to order a certain quantity of blood to be taken away, but do not condescend to superintend the operation. This is unpardonable in the surgeon and censurable in the owner of the horse. The animal is bled for some particular purpose. There is some state of disease, indicated by a peculiar quality of the pulse, which we are endea- vouring to alter. The most experienced practitioner cannot tell what quantity of blood must be abstracted in order to produce the desired efiect. The change of the pulse can alone indicate when the object is accom- plished ; therefore, the operator should have his finger on the artery during the act of bleeding, and, comparatively regardless of the quantity, continue to take blood, until, in inflammation of the lungs, the oppressed pulse becomes fuller and more distinct, or the strong pulse of considerable fever is evidently softer, or the animal exhibits symptoms of faintness. INFLAMMATION Consists of a disturbed action of the circulation, by which an imcreased flow of blood is determined to a particular part. It is characterised by redness, swelling, heat and pain. The redness proceeds from the greater quantity of blood flowing through the part, occasioned by the dilated con- dition of the vessels. The swelling arises from the same cause, and from the deposit of fluid in the neighbouring substance. The natural heat of the body is produced by the gradual change which takes place in the blood, in passing from an arterial to a venous state. If more blood is driven through the capillaries of an inflamed part, and in which this change is effected, more heat will necessarily be produced there ; and the pain is easily accounted for by the distension and pressure which must be pro- duced, and the participation of the nerves in the disturbance of the suri'ounding parts. If the inflammation be slight, and arrested by ti-eatment in its early stages, resolution and a return to a healthy condition of the part will follow;, but if it be acute and go on unchecked, it will terminate either in effusion, adhesion, suppuration, or gangTene. In the treatment of inflammation, blood-letting has always held a pro- minent position. In times past it was carried to an injurious extent ; there is, perhaps, a tendency at the present day to go to the other exti-eme, by neglecting many opportunities when great benefit might result fro-m the abstraction of blood, especially in local inflammations. An eminent writer on this subject says ' it is a measure, life-giving in its proper use, and deadly if abused. Its benefits may be explained on any theory ; by diminishing the mass of blood, it lessens the labour of the heart and lungs, and allows the remaining blood to be oxygenated and purified by natural influences. It diminishes the rush of blood to the inflamed part, and allows distended venous capillaries to empty themselves ; it decreases the specific gravity, and increases the absorptive power of the blood ; it pro- motes the action ol the skin and bowels, and imitates the spontaneous 306 INFLAMMATION. hemorrliage by wliich nature often gives relief.' Blood is generally abstracted from tlie jugular vein, and so the general quantity may be lessened ; but if it can be taken from the neighbourhood of the diseased part, it will be productive of tenfold benefit. One quart of blood abstracted from the coronet in acute founder, by unloading the vessels of the inflamed part, and enabling them to contract, and, in that contraction, to acquire tone and power to resist future distension, will do more good than five quarts taken froia the general circulation. An ounce of blood obtained by scarifying the swelled vessels of the inflamed eye, will give as much rehef to that organ as a copious bleeding from the jugular. It is a prin- ciple in the animal frame which should never be lost sight of by the veterinary surgeon, or the horseman, that if by bleeding the process of inflammation can once be checked, — if it can be suspended but for a little while, — although it may return, it is never with the same degree of violence, and in many cases it is got rid of entirely. Hence the necessity of bleeding early, and bleeding largely. Many horses are lost for want or insufficiency of bleeding, but very rarely is one materially injured by the most copious extraction of blood in the early stage of acute inflammation. The horse will bear, and with advantage, the loss of an almost incredible quantity of blood ; four quarts taken from him will be comparatively little more than one pound taken from the human being. "We can scarcely conceive of a considerable inflammation of any part of the horse, whether proceeding from sprains, contusions, or any other cause, in which bleeding, local (if possible), or general, will not be of essential service. Next in importance to bleeding, is purging. Something may be re- moved from the bowels, the retention of which would increase the general irritation and fever. The quantity of blood will be materially lessened ; for the serous or watery fluid which is separated from it by a brisk purge, tiie action of which in the horse continues frequently more than twenty- four houxs, is enormous. While the blood is thus determined to the bowels, less even of that which remains will flow through the inflamed part. When the circulation is directed to one set of vessels, it is proportionately diminished in other parts. It was first directed to the inflamed portions, and they were overloaded and injured, — it is now directed to the bowels, and the inflamed parts are relieved. While the purging continues, some degree of languor and sickness are felt, and the force of the circulation is thereby diminished, and the general excitement lessened. The importance of physic in every case of considerable external inflammation is sufficiently evident. If the horse is laid by for a few days from injury of the foot, or sprain, or poll-evil, or wound, or almost any cause of inflammation, a physic-ball should be given. In cases of internal inflammation, much judgment is required to deter- mine when a purgative may be beneficial or injurious. In inflammation of the lungs, it should never be given. There is so strong a sympathy between the various contents of the cavity of the chest, that no one of them can be inflamed to any great extent without all the others being disposed to become so ; and, therefore, a dose of physic in inflamed lungs would perhaps be as fatal as a dose of poison. The excitement produced on the bowels by the purgative may run on to inflammation, which no medical skill can stop. The means of abating external inflammation are various, and seemingly contradictory. The heat of the part very naturally led to the apphcation of cold embrocations and lotions. Heat has a strong tendency to equaHse itself, or to leave that substance which has a too great quantity of it, or little capacity to retain it, for another which has less of it, or more capacity. Hence the advantage of cold applications, by which a great IXFLAMMAnON. 307 deal of the tmn.atural heat is speedily abstracted from the inflamed part. Wlien benefit is derived from these applications, it is to be attributed in some measure to their coldness. The cold tends to brace up and invigorate the parts, and the evaporation from the blood, consequent upon the apph- cation of moisture, conduces rapidly to reduce the inflammation. A bandage well wetted, partially wrung out, and renewed every half hour or less, during the continuance of active inflammation, will cause it to Bubside considerably. When the acute stage has passed off, the wet bandage must be well wrung out, covered by three or four folds of dry linen, changed every three or four hours, and wet hand-rubbing for five or ten minutes applied twice or thrice a day. Sometimes, however, we resort to warm fomentations, and the benefit derived from their use is to be traced to the warmth of the fluid, more than to any medicinal property in it. "Warm water will do as much good to the horse, who has so thick a skin, as any decoction of chamomile, or marsh-mallow, or poppy heads, or any nostrum that the farrier may recommend. Fomentations increase the warmth of the skin, and open the pores of it, and promote perspiration, and thus lessen the tension and swelhng of the part, assuage pain, and relieve inflammation. Foment- ations, to be beneficial, should be long and frequently appHed, and at as great a degree of heat as can be used without giving the animal pain. Poultices are more permanent, or longer-continued fomentations. The part is exposed to the influence of warmth and moisture for many hours or days without intermission, and perspiration being so long kept up, the distended vessels will be very materially relieved. The advantage derived from a poultice is attributable to the heat and moisture, which, by means of it, can be long appHed to the skin, and it shoidd be composed of materials which will best retain this moisture and heat. The bran poultice of the farrier is, consequently, objectionable. It is never perfectly in contact with the surface of the skin, and it becomes nearly dry in a few hours, after which it is injurious rather than beneficial. Linseed-meal is a much better material for a poultice, for, if properly made, it will remain moist during many hours. The two, however, may be mixed with advantage ; and, if judiciously and carefully applied — that is, in close contact with the skin — are of considerable efiicacy. It is occasionally very difiicult to decide when a cold or a hot appucation is to be used, and no general rule can be laid down, except that in cases of superficial inflammation, and in the early stage, cold lotions will be preferable ; but, when the inflammation is deeper seated, or fully established, or extended over a large surface, warm fomentations will be most service- able. Stimulating applications are frequently used in local inflammation. When the disease is deeply seated, a stimulating application to the skin vrill cause some irritation and inflammation there, and lessen or sometimes rem-ove the original malady ; hence the use of rowels and blisters in tuflammation of the chest. Inflammation to a high degree caimot exist in parts that are so near each other. If we excite it in one, we shall abate it in the other, and also, by the discharge which we estabhsh from the one, we shall lessen the determination of blood to the other. Stimulating and blistering apphcations should never be appUed to a part already inflamed. A fire is not put out by heaping more fuel upon it. Hence the mischief which the farrier often does by rubbing his abominable oils on a recent sprain, hot and tender. Many a horse has been ruined by this absurd treatment. When the heat and tenderness have disappeared by the use of cold lotions or fomentations, and the leg or sprained part remains enlarged, or bony matter threatens to be deposited, it may then x2 308 FEVEK. be right to excite inflammation of the skin by a blister, in order to ro'iB6 the deeper- seated absorbents to action, and enable them to take np this deposit; but, except to hasten the natural process and effects of inflammation, a blister, or stimilating application, should never be applied to a part already inflamed. FEVER, Fever is general increased arterial action, either without any local affection, or in consequence of the sympathy of the system with inflam- mation in some particular part. The first is pure fever. Some have denied that that exists in the horse, but they must have been strangely careless observers of the diseases of that animal. The truth of the matter is, that the usual stable management and general treatment of the horse are so absurd, and various parts of him are rendered so likely to take on inflammation, that pure fever will exist a very little time without degenerating into inflammation. The lungs are so weakened by the heated and foul air of the ill-ventilated stable, and by sudden changes from almost insufferable heat to intense cold, and the feet are so injured by hard usage and injudicious shoeing, that, sharing from the beginning in the general vascular excitement which characterises fever, they soon become excited far beyond other portions of the frame ; and that which commenced a fever becomes inflammation of the lungs or feet. Pure fever, however, is sometimes seen, and runs its course regularly. It frequently begins with a cold or shivering fit, which, although not essential to fever, will very frequently be found preceding it. The horse is dull, unwilling to move, has a staring coat, and cold legs and feet. This is succeeded by increased warmth of the body ; unequal distribution of warmth to the legs ; one hot, and the other three cold, or one or more unnaturally warm, and the others unusually cold, but not the deathlike coldness of inflammation of the lungs ; the pulse quick, soft, and often indistinct ; the bi^eathing a Httle quickened ; but no cough, or pawing, or looking at the flanks. The animal will scarcely eat, and is very costive. While the state of pure fever lasts, the shivering fit returns at nearly the . 8ame hour every day, and is succeeded by a warm one, and that often by a slight degree of perspiration ; and these alternate during several days until local inflammation appears, or the fever gradually subsides. A horse rarely dies of pure fever. If he is not destroyed by inflammation of the lungs, or feet, or bowels succeeding to the fever, he generally recovers. In the treatment of fever care should be taken to husband the strength of the animal as much as possible. The horse should be placed in a cool well- ventilated stable, and his body and extremities warmly clothed. Bleeding, and the administration of aloes or other active purgatives, should on no account be had resort to , the former as being likely to increase the debility which generally attends this disease, and the latter from the danger of excessive purgation, in consequence of the irritable condition of the mucous membrane of the bowels. Fever medicines in combination with diffusible stimulants should be administered, such as the spirit of nitric ether in combination with the liquor ammoniae acetatis, and nitrate of potash. The constipation of the bowels usually present should be relieved by clysters of warm soap and water, or if necessary by a small dose of oil. The animal should be kept on soft food for the first few days, when a more generous diet may be allowed. If the disease run its course as pure fever, we may soon begin the administration of tonic medicine with advantage, such as ginger, gentian, or chincona bark, the latter being especially serviceable. Fever, however, terminates in inflammation of some important organ, particularly the lungs. The same treatment should PURPURA HiEMORRIIAGlCA. — RHEUMATISM. 309 aov? be adopted as recommended in pneumonia, with the exception of bleeding and other depleting measures, and the earlier resort to tonic agents. Symptomatic fever is increased arterial action, proceeding from some local cause. No organ of consequence can be much disordered or inflamed vrithout the neighbouring parts being disturbed, and the whole system gradually participating in the disturbance. Inflammation of the feet or of the lungs never existed long, or to any material extent, without being accompanied by a considerable degree of fever. The treatment of symptomatic fever should resemble that of simple fever, except that particular attention must be paid to the state of the part originally diseased. If the inflammation which existed there can be «ubdued, the general disturbance will usually cease. PURPURA H5:M0RRHAGICA. This is a pecuhar disease of the blood, more frequently met with in the horse than in any other animal. Little is understood respecting the cause of it, but it is said to be produced by an altered condition of the blood, depend- ant upon a deranged condition of the secreting organs, such as the kidneys, liver, &c. It assumes two forms — the acute, and chronic. In the former it occurs most in the summer months, and generally makes its appearance suddenly. In the early stage there will be slight bleeding from the nostrils ; swellings in the softer parts of the body, especially about the labia and rectum ; the eyes wiU also be swollen and blood-shot, with blood trickling from them ; pulse very rapid and wavering ; breathing hurried and difficult, often sonorous. This disease is generally fatal, and runs its course very rapidly. The swellings, especially about the head, will generally increase, in some instances threatening suifocation ; the other symptoms will go on, and the animal not unfrequently falls down and dies in the course of eight or ten hours from the commencement of the attack. The treatment, if seen at the commencement of the disease, should consist of m.oderate blood-letting ; but if, as is generally the case, the disease has made considerable progress, we must not bleed, but give diffasible stimulants and diuretics, as the spirits of niti-ic ether or the spirits of turpentine, the latter being the best. The animal should be placed in a well-ventilated box, and the body and extremities well clothed. If the swelhng increase 30 as to threaten sufibcation, tracheotomy should be had resort to. The chronic form of this disease depends upon a directly opposite state of the blood, and frequently follows catarrhal affections, influenza, and any de- bilitating causes. There is generally swelling in the same parts, but not to the same extent ; and we have no bleeding from the nostril, the schneiderian membrane being studded with petechial spots. The pulse is weak and tremulous, and the bowels torpid. It may exist in this state for two or three weeks, and rarely passes away in less than ten or twelve days. In treating this form of the disease, the animal should be placed in a well- ventilated box, the body and extremities warmly clothed, and allowed a generous diet. Tonics, such as columba, gentian, and ginger, should be given daily, with diffusible stimulants such as the spirit of nitric ether, to restore the functions of the kidneys and skin. If there be much effusion, it vrill be advisable to give sulphate of iron. This form of the disease, unlike the former, generally yields to treatment. RHEUMATISM. This is essentially a disease depending upon the accumulation of some poisonous agent (probably lactic acid) in the blood. It is only of late years that it has been adniitted into the list of the diseases of the 310 RHEUMATISM. horse, although it is in truth a very common affection. Animals at all ages are subject to it, but it is most frequently met with in old horses that have been early abused, and amongst younger ones "whose powers have been severely taxed. In the majority of ca>^es, however, it will be met with in animals recovering from some debilitating disease, especially pneu- monia and influenza. The animal will be found very lame on one or both limbs. On examination, considerable swelhng, attended with great heat and pain on pressure, will be found about the fetlock joint. This may suddenly leave the part affected and attack another limb, and as suddenly return again. The lameness is frequently excessive, and the pain is evi- dently excruciating. The animal fears to rest his weight on the limb, or even to touch the ground -with his toe. He is heaving at the flanks, some- times sweating profasely, his countenance plainly indicative of the agony he feels. With proper treatment the pain and lameness generally disappear ; but in other instances the ligaments become thickened and rigid, the capsules of the joint are loaded with fibrinous deposits, and the joint is evidently enlarged. In some instances it assumes a somewhat chronic form.. Most horsemen will recollect cases in which the animal that seemed the preceding day to be perfectly sound becomes decidedly lame, and limps as though he had lost the use of his limbs. The lameness is indicated rather by an unwillingness to use the limb than by an expression of pain in stepping on it. There will be considerable swelling, extending frequently from the knee to the fetlock down the whole course of the flexor tendons, and all the constitutional irritation usually attending excessive pain. These symptoms may gradually disappear in the course of a fortnight and the ardmal appear perfectly sound, but in a short time the disease will again return with all its former violence. This is a very troublesome form of rheumatism, and one which is rarely cured. It is considerably influenced by cold or wet weather. Mr. Cooper, of Coleshill, relates a case very applicable to the present subject. A farmer purchased a horse, to all appearance sound, and rode him home — a distance of ten miles. He was worked on the two following days, without showing the least lameness. On the third day it was with great difficulty that he managed to limp out of the stable. !Mr. Cooper was sent for to examine him. The horse had clean legs and excellent feet. The owner would have hirn blistered all round. It was done. The horse was turned out to grass for two months, and came up perfectly sound. The weather soon afterwards became wet and cold, and the horse again was lame ; in fact, it presently appeared that the disease was entirely influenced by the changes of the atmosphere. ' Thus,' adds Mr. C, ' in the summer a horse of this description will be mostly sound, while in the winter he will be generally lame.' Rheumatism sometimes affects the muscles, assuming a neuralgic character. In this form of the disease there may be no acute inflamma- tion or pain on pressure. The following account of acute rheumatism, by Mr. Thompson, of Beith, is too valuable to be omitted : — ' I have had,' says he, ' fourteen cases of this disease. The muscles of the shoulders and arms were generally the parts afiiected. The cure was effected in a few days, and consisted of a good bleeding from the jugular, and a sharp purge. ' One of these cases was uncommonly severe. The disease was in the back and loins. The horse brought forward bis hind-legs under his flanks, roached his back, and drew up his flanks with a con\Tilsive twitch, accom- panied by a piteous groan, almost every five minutes. The sympathetic fever was alarming, the pulse was 90, and there was obstinate constipation of the bowels. The horse literally roared aloud if any one attempted to THE ANATOMY AND DISEASES OP THE DIGESTIVE ORGANS. 311 sMft him in the stall, and groaned excessively when lying. He was bled almost to fainting ; and three moderate doses of aloes were given in tlxe course of two days. Injections were administered, and warm fomentations were frequently applied to the back and loins. On the third day the physic operated briskly, accompanied by considerable nausea and reduction of the pulse. From that time the animal gradually recovered. ' These horses are well fed, and always in good condition ; but they are at times worked without mercy, which perhaps makes them so liable to these attacks,' In the treatment of rheumatism attention should be paid to the probable nature and causes producing it. When it follows pneumonia, influenza, or other debilitating causes, our first object should be to restore the genei-al health of the animal by the judicious administration of tonic medicines and nutritious foods ; an occasional diuretic may also be given. Our local apphcations should consist in the acute stage of warm fomentations, to be soon followed by some stimulating liniment, such as the compound soap liniment or the vinegar of cantharides. By these means this form of the disease will generally quickly disappear. When rheumatism suddenly attacks an animal in apparent health much more active means must be resorted to. We must endeavour to arouse the excretory organs, as the Hver and kidneys, into increased action. Half a drachm of calomel and opium combined with three drachms of aloes should be at once administered, followed in a day or two by active diuretics. Warm fomentations should be apphed to the parts, and when the acute inflammation is subdued, a bhster ; the animal being kept perfectly quiet, and allowed nothing but bran mash or other soft foods. Colchicum, guiacum, and other medicines which are esteemed as valuable remedial agents on the human subject in tliis disease, appear to produce but Httle efi'ect upon the horse. CHAPTER XIV. THE ANATOMY AND DISEASES OF THE DIGESTIVE OKGANB. We have abeady described the anatomy of the lips, tongue, teeth, and other organs connected with the digestive system in the mouth of the animal, and we now pass on to the back of the mouth, and arrive at what is called the PHARYNX. It is a fannel-shaped cavity (carrying or conveying the food towai-ds the oesophagus). It commences at the root of the tongue, is separated from the mouth by the soft palate, which hangs down from the palatine bone, and extends to the epiglottis or covering to the windpipe. When the food has been sufiiciently ground by the teeth, and mixed with the saliva, it is gathered together by the tongue, and by the action of the cheeks and tongue, and back part of the mouth, forced against the soft palate, which, giving way, and being raised upwards towards the entrance into the nostrils, prevents the food from proceeding that way. It passes to the pharjTix, and the soft palate again falhng down, prevents its return to the mouth, and also prevents, except in extreme cases, the act of vomiting in the horse. Whatever is returned from the stomach of the horse, passes through the nose. The sides of the pharynx are Hned with muscles which now bagin 312 THE (ESOPHAGUS, OR GULLET. powerfally to contract, and by that contraction the bolus is forced on until it reaches the g'ullet, which is the termination of the pharynx. Before, however, the food proceeds so far, it has to pass over the entrance into the windpipe, and should any portion of it enter that tube, much inconveni- ence and danger might result ; therefore, this opening is not only lined by muscles which close it at the pleasure of the animal, but is hkewise covered by a heart-like elastic cartilage, the epiglottis, with its back towards the pharynx, and its hollow towards the aperture. The epiglottis yields to the pressure of the bolus passing over it, and lying flat over the opening into the wdndpipe, prevents the possibility of anything entering into it. No sooner, however, has the food passed over it, than it rises again by its own elasticity, and leaves the upper part of the windpipe once more open for the purpose of breathing. THE (ESOPHAGUS, OE GULLET. The oesophagus consists of a muscular membranous tube extending from the pharynx to the stomach, and conveys the food from the mouth to the stomach. At the top of the neck, it is immediately behind the windpipe, but it soon inclines to the left, and runs down the neck close to the A\dnd- pipe, and on its left. Having entered the chest between the first two ribs, the gullet passes along the upper part of it, and then piercing the dia- phragm, or midriff, enters the stomach. It is composed of three coats ; the outer one of slight loose cellular substance : the middle one muscular, and divided into two distinct layers, the outermost layers having the fibres lengthways, by which the gullet may be shortened, and in shortening widened for the reception of the food ; — the fibres of the inner layers run- ning circularly round the tube, so that the portion immediately above a pellet of food will by its contraction force the food downward, and by successive actions drive it into the stomach. The inner coat, which is a continuation of the membrane of the pharynx, lies in folds or plaits, ex- tending lengthways. The muscular coat, being highly elastic, readily gives way to the pressure of the food, and these plaits enable the inner or cuticular coat, likewise, sufiiciently to dilate. The oesophagus does not, however, enter straight into the stomach, and with a large open orifice ; but there is an admirable provision made to prevent the regurgitation of the food when the stomach is filled and the horse suddenly called upon to perform unusually hard work. The oeso- phagus enters the stomach in a somewhat curved direction, — it runs obliquely through the muscular and cuticular coats for some distance, and _ then its fibres arrange themselves around the opening into the stomach. Close observation has shown that they form themselves into segments of circles, interlacing each other, and by their contraction plainly and forcibly closing the opening, so that the regurgitation of the food is almost impossible. The annexed diagram by Mr. Ferguson, of Dublin, Avill give a genei-al idea of the structure of the termination of the oesophagTis, and the manner in Avhich it en- circles the orifice of the stomach. A microscope of very feeble power will beautifully show this sin- gular construction. It is not precisely either a sphincter muscle or THE STOMACH. 313 a valve, but it is a strong and almost insuperable obstacle to the regur- gitation of the food. THE STOMACH. a The oesophagus or gullet, extending to the stomach. b The entrance of the gullet into the stomach. The circular layers of the muscles are very thick and strong, and, by their contractions, help to render it difficult for the food to be returned or vomited. c The portion of the stomach wliich is covered by cuticle, or insensible skin. d d The margin, -which separates the cuticular from the villous portion. e e The mucous, or villous (velvet) portion of the stomach, in which the food is princi- pally digested. / The commimication between the stomach and the first intestine. g The common orifice through which the bile and the secretion from the pancreas pass into the first intestine. The two pins mark the two tubes here united. The stomach is situated on the left side of the abdomen, in what is termed the hypochondriac region, a small portion extending to the epi- gastric region. Its anterior part is in connection T\dth the Hver ; its left extremity with the diaphragm and spleen. The situation of the stomach will at once explain the reason why a horse is so much distressed, and sometimes irreparably injui-ed, if worked hard immediately after a full meal. The stomach must be displaced and diiven back by every contraction of the diaphragm, or act of inspiration ; and in proportion to the fulness of the stomach -will be the weight to be overcome, and the labour of the diaphragm, and the exhaustion of the animal. If the stomach is much distended, it may be too weighty to be forced sufficiently far back to make room for the quantity of air which the animal in a state of exertion requires. Hence the frequency and labour of the breathing, and the quickness with which such a horse is blown, or possibly destroyed. Hence also the folly of gi^-ing too full a meal, or too much water, before the horse starts on a journey or for the chase ; and, in like manner, the absurdity and danger of that unpardonable custom of some grooms to gallop the horse after his drink, in order to warm it in his bell}^ and prevent gTipes. The horse was destined to be the servant of man, and to be always at his call whether fasting or full : it would seem, therefore, that, to lessen much 814 THE STOMACH. inconvenieiice or danger, a smaller stomach, in proportion to his size, is given to the horse than to ahnost any other animal. The bulk of the horse, and the services required of him, demand much nutriment, and that of such a nature as to occupy a very considerable space ; yet his stomach, compared with his bulk, is not half so large as that of the human being : therefore, although he. Like every other animal, feels inconvenience from great exertion immediately after a full meal, he suffers not so much as other quadrupeds, for his stomach is small, and his food passes rapidly through it, and descends to a part of the intestines distant from the dia- phragm, and where the existence and pressure of the food cannot cause him any annoyance. The stomach has four coats. The outermost is the lining of the cavity of the belly, and the common covering of all the intestines — that by which they are confined in their respective situations, and from which a fluid is secreted that prevents all friction between them. This is a serous membrane called the peritoneum — that which stretches round the outside of the stomach. The second is the muscular coat, consisting of three layers of fibres, one running lengthways, the other circularly, and the other obliquely, and by means of which a constant gentle motion is communicated to the stomach, mingling the food more intimately together, and preparing it for digestion, and by the pressure of which the food when properly prepared is urged on into the intestines. The third, or cuticular (skin-liJce) coat, c, covers a portion of the inside of the stomach. It is a continuation of the lining of the gullet. There are numerous glands on it, which secret a mucous fluid ; and it is pro- bably intended to be a reservoir in which a portion of the food is retained for a while, and softened and better prepared for the action of the other or true digestive portions of the stomach. The cuticular coat occupies nearly one-half of the inside of the stomach. The other portion of the stomach is lined by the villous portion, from which the true gastric juice is secreted, where the work of digestion properly commences. The mouths of numerous little vessels open upon it, pouring out a pecuhar fluid, the gastric (stomach) juice, which mixes with the food already softened, and converts it into a fluid called chyme. As this is formed, it passes out of the other orifice of the stomach, the •pylorus (doorkeepers),/, and enters the first small intestine; the harder and undissolved parts being turned back to undergo farther action. Every portion of the muscular coat has the power of successively con- tracting and relaxing, and thus, in the language of Dr. Bostock, ' the successive contraction of each part of the stomach, by producing a series of folds and wrinkles, serves to agitate the alimentary mass, and, by bringing every part of it in its turn to the surface, to expose it to the influence of the gastric juice, while at the same time the whole of the contents are gradually propelled forwards, from the orifice which is con- nected with the oesophagus to that by which they are discharged.' The pneumo-gastric nerve is the agent in producing these alternate contractions and relaxations. It is the motor nerve belonging to these parts. It has to keep the parietes of the stomach in contact with the food, and the food in contact with the gastric juice. It has to bring the different parts of the food in successive contact with the stomach, and to propel them through this portion of the alimentary canal in order that they may be discharged into the duodenum. THE INTESTINES. 3i5 THE INTESTINES. The food liavino- been partially dio-csted in tlie stomach, and converted into chyme, passes'^through the pyloric orifice into the intestines. a The commencement of the small intestines. The ducts which convey the bile and the secretion from the pancreas are seen entering a little below. b b The convolutions or windings of the small intestines. ccc Portions of the mesentery. d The small intestines, terminating in the caecum. AU^A\r,c, it e The caecum or blind gut, with the bands running along it, puckering and diMdmg it into numerous cells. {, tE: S.tfiota'd «;°«i»» «f "- colon, divided, like .he o»cum, in.o oeUs. h The termination of the colon in the rectum. i The termination of the rectum at the anus. The intestines of a full-gTO^^ii horse are not less than ninety feet in length The length of the bowels in different animals depends on the nature of the food. The nntritive matter is with much more difl&culty extracted from vegetable than animal substances ; therefore the aimentary canal is large, long, and complicated in those which, hke the horse, are principally or enth'ely fed on corn or herbs. They are divided into the small and large intestines; the former of which occupy about sixty-six feet, and the latter twenty-four. The intestines, like the stomach, are composed ot three coats. The outer one consists of a peritoneum— that membrane which lias been already described as investing the contents of the abdomen J^y means of this coat, the intestines are confined in their proper situations ; and, this membrane being smooth and moist, all friction and concussion are prevented. Did the bowels float loosely m the abdomen they would be subject to constant entanglement and injury amid the rapid and violent motions of the horse. , , -, ^<. The middle coat, like that of the stomach, is muscular, and composed ot two layers of fibres, one running longitudinally and the other circularly; and by means of these muscles, which are continually contracting and relaxing in a direction from the upper part of the intestines to the lower, the food is propelled along the bowels. The inner coat is the mucous or villous one. It abounds with mna- 316 THE INTESTINES. merable small glands, whicli secrete a mucous fluid to lubricate the passages and defend it from irritating or acrimonious substances ; and it is said to be villous, from its soft velvet-like feeling. This coat is crowded with in- numerable minute orifices that are the commencement of vessels called ladeals, fi'om the millvy appearance of their contents, by which the nutri- tive part of the food is taken up ; and these vessels, uniting and passing over the mesentery, carry this nutritive matter to a proper receptacle for it, whence it is conveyed into the circulation, and distributed to every part. The intestines are chiefly retained in their relative positions by the inesentery, c (middle of the intestines), which is a doubling of the peri- toneum, including each intestine in its folds, and also enclosing in its dupHcatures the arteries, the veins, the nerves, and the vessels which convey the nutriment from the intestines to the circulation. The first of the small intestines, and commencing from the right ex- tremity of the stomach, is the duode7ium., a, a very improper name for it in the horse, for in that animal it is nearly two feet in length. It is the largest and shortest of all the small intestines. It receives the food con- verted into chjTne by the digestive power of the stomach, and here it iindergoes another and very important change. It is mixed with the bile, and the secretion from the pancreas, which enter this intestine about five inches from its commencement. The bile seems to be the principal agent in the change now effected, for no sooner does it mingle wdth the chyme than that fluid begins to be separated into two distinct ingredients • — a white thick liquid termed chyle, containing the nutritive part of the food, and a yellow pulpy substance, the innutritive or excrementitious portion, which, when the chyle is all pressed fi-om it, is evacuated through the rectum. The process of digestion being thus to a certain extent completed, the food passes through the other small intestines, and dui'ing that passage the chyle, or nutritious portion, is absorbed by the lacteals, so called from the milky appearance of their contents, to be conveyed into the circulation, and converted into blood, while the non-nutritious portion passes on to the larger intestines. The next portion of the small intestines is the Jejunum, so called because it is generally found to be empty. It is smaller in bulk and paler in colour than the duodenum. It is more loosely confined in the abdomen — floating comparatively unattached in the cavity of the abdomen, and the passage of the food being comparatively rapid thi'ough it. There is no separation or distinction between it and the next intestine — the Ileum. There is no point at which the jejunum can be said to terminate and the ileum commence. Together they form that portion of the intestinal tube which floats iu the umbilical region: the latter, however, is said to occupy three-fifths, and the former two-fifths, of this portion of the intestines, and the five would contain about eleven gallons of fluid. The ileum is evidently less vascular than the jejunum, and gradually diminishes in size as it approaches the larger intestines. These two intestines are attached to the s^Dine by a loose doubling of the peritoneum, and float freely in the abdominal cavity, their movements and their relative positions being regulated only by the size or fulness of the stomach, and the stage of the digestive process. The small intestines derive their blood from the anterior mesenteric artery, wliich divide into innumerable minute branches that ramify between their muscular and villous coats. Their veins, which are destitute of valves, return the blood into the vena portce. The large intestines are three iu number : — the ccecum, the colon, and THE INTESTINES. 317 the rectum. The first of them is the coicuvi (blind giit), {e)—\i has but one opening into it, consequently everything that passes into it, having reached the blind or closed end, must return, in order to escape. It is not a continuation of the ileum, but the ileum pierces the head of it, as it Avere, at right angles (fZ), and projects some way into it, and has a valve — the valvula coli — at its extremity, so that the food that has passed from the small intestines into the larger cannot again be returned. Along the outside of the cfecum run three strong bands, each of them shorter than that intestine, and thus puckering it up, and forming it into three sets of cells, as sho^-n in the accompan;y4ng side cut. That portion of the food which has not been taken up by the lacteals or absorbent vessels of the small intestines passes through this vah-ular opening of the ileum, and a part of it enters the colon, while the remainder flows into the csecum. Then, from this being a blind pouch, and from the cellular structure of this pouch, the food must be detained in it a veiy long time ; and in order that, during this detention, all the nutriment may be extracted, the caecum and its cells are largely supplied with blood-A^essels and absorbents. It is principally the fluid part of the food that seems to enter the c^cum. A horse will di-ink at one time a great deal more than his stomach will contain ; or even if he drinks a less quantity, it remains not in the stomach or small intestines, but passes on to the ciBcum, and there is retained, as in a reservoir, to supply the Avants of the system. In his state of servitude the horse does not often drink more than twice or thrice in a day, and the food of the stabled horse being chiefly dry, this water stomach is most useful to him. The ctecum ^^-\\\ hold four gallons. The colon is an intestine of exceedingly large dimensions, and is capable of containing no less than twelve gallons of liquid or pulpy food. At its union Avith the ca?cum and the ileum, although larger than the latter in- testine (/), it is of comparatively small bulk ; but it soon sAvells out to an enormous extent. It has likeAA-ise, in the greater part of its course, three bands like the caecum, Avhich also . divide it, internally, into the same description of cells. The intention of this is evident, — to retard the progress of the food, and to g-ive a more extensive surface on Avhich the vessels of the lacteals may open ; and therefore, in the colon, all the chyle is finally separated and taken up. This intestine is of considerable length; it completely traverses the diameter of the abdominal cavity, and is then reflected on itself, and retraverses the same space. When this is nearly accomplished, the construction of the colon is somewhat changed:— we find but tAvo bands towards the rectum, and these not puckering the intestine so much, or forming such numerous or deep cells. The food does not require to be much" longer detained, and the mechanism for detaining it is gradually disappearing. The blood-vessels and absorbents are likeAvise rapidly diminishing. The colon, also, once more contracts in size, and the chyle having been'^all absorbed, the remaining mass, being of a harder consistence, °is moulded into pellets or balls in its passage through these shallower cells. At the termination of the colon, the rectum (straight gut) commences. It is smaller in circumference and capacity than the colon, although it aviU contain at least three gallon^s of water. It serves as a reservoir for the 318 THE LIVER. iung until it is evacuated. It has none of these bands, because, all the autriment being extracted, the passage of the excrement that remains should be hastened and not retarded ; still, however, it would be very dis- agreeable were the horse to void his faeces in the same fluid state as does the cow. To prevent this the inner coat of the rectum and a portion of the colon form a series of cells, in which the excrementitious portion of the food lodges until it becomes drier and more compact, and it is then eva- cuated in a much less offensive form. The faeces descend to the rectum, which somewhat enlarges to receive them ; and when they have accu- mulated to a certain extent, the animal, by the aid of the diaphragm and the muscles of the belly, presses upon them, and they are evacuated. A curious circular muscle, and always in action, and called the sphincter (constrictor muscle), is placed at the anus, to prevent the constant and unpleasant dropping of the faeces, and to retain them until the horse is disposed voluntarily to expel them. This is effected by the efforts of the animal, assisted by the muscular coat of the rectum, which is stronger than that of any of the other intestines, and aided by the compression of tho internal obHque and transverse muscles. The larger intestines derive their blood from the posterior mesenteric artery. Their veins terminate in the vena portaa- THE LIVER Is situated principally in the right side of the abdominal cavity, but extending partially into the left, and is surrounded by the ribs, diaphragm, and stomach, its right lobe or division in contact with the diaphragm, the duodenum and the right kidney, and the middle and left divisions with the stomach. It is an irregularly shaped, reddish-brown substa,nce, of considerable bulk, and performs a very singular and important office. It has been already stated (p. 303) that the blood, which has been con- veyed to the different parts of the body by the arteries, is brought back to the heart by the veins ; but that which is returned from the stomach and intestines, and spleen, and pancreas, and mesentery, instead of flowing directly to the heart, as the blood from every other part of the body does, has an extra duty to perform before again entering into the general circu- lation— to secrete the bile : to effect this, it is collected in a large but short vein, called the vena portae, which enters the liver by two large branches, that spread by means of innumerable minute branches through every part of it. As the blood traverses this organ, a fluid is separated from it, called the bile, which answers an important purpose, for the pro- gress of digestion is promoted by the bile changing the nutritive portion of the food from chyme into chyle, and separating it from that which, con- taining httle or no nutriment, is voided as excrement. Having performed this additional duty the fluid is returned from one vein into another, that is, from the vena port», which conveys it to the liver for the secretion of bile, to the hepatic veins, which return it to the general circulation. Almost every part of the Hver is closely invested by the peritoneum, which seems to discharge the office of a capsule to this viscus. Its arteries are very small, considering the bulk of the liver, to nourish which, however, is their only duty ; their place in the secretion of bile is curiously supplied by a vein — the vena portce — a vessel formed by the union of the splenic and mesenteric veins, and which seems, if it does not quite usurp the office and discharge the duty of the artery, to be alone conceraed in the secretion of the bile. There is a free intercourse between the vessels of *.he two. The bile, thus formed, is in most animals received into a reservoir, the gall-bladder, whence it is conveyed into the duodenum {g, p. 313) at the THE PANCREAS. — SPLEEN. OMENTUM. .SIQ times, and in tlie quantities, which the purposes of digestion require ; but the horse has no gall-bladder, and, consequently, the bile flows into the intestine as rapidly as it is separated from the blood. The reason of this is plain. A small stomach was given to the horse in order that the food might pass quickly out of it, and the diaphragm and the lungs might not be injuriously pressed upon, when we require his utmost speed ; and also that we might use him \^'ith little danger compared with that which would attach to other animals, even when his stomach is distended with food. Then the stomach, so small, and so speedily emptied, must be ofbener replenished ; the horse must be oftener eating, and food oftener or almost continuously passing out of his stomach. How admirably does this com- port with the uninterrupted supply of bile ! THE PANCREAS. In the domestic animals which are used for food, this organ is called the sweet-hread. It hes between the stomach and the left kidney. It much resembles in structure the salivary glands in the neighbourhood of the mouth, and the fluid which it secretes resembles the sahva in its properties. The pancreatic fluid is carried into the intestines by a duct which enters at the same aperture with that from the liver. It contains a peculiar substance named pancratine. Its use, whether to dilate the bile or the chyme, or to assist in the separation of the chyme from the feculent matter, has never been ascertained : it is, however, clearly employed in aiding the process of digestion. THE SPLEEN. This organ, often called the melt, is a long, bluish-brown substance, broad and thick at one end, and tapering at the other ; lying along the left side of the stomach, and between it and the short ribs. It is of a spongy nature, divided into numerous httle cells not unlike a honeycomb, and over which thousands of minute vessels thickly spread. The particular use of this organ has never been clearly ascertained, for in some cruel experi- ments it has been removed without apparent injury to digestion or any other fonction. It is, however, useful, at least occasionally, or it would not have been given to the animal. It is probably concerned in the reno- vation of the blood, and in the preparation of it for the secretion of bile. THE OMENTUM. Or cawl, is a doubling of the peritoneum. It is supposed to have been placed between the intestines and the walls of the belly in order to prevent concussion and injury during the rapid movement of the animal. That, how- ever, cannot be its principal use in the horse, from whom the most rapid movements are required ; for in him it is unusually short, extending only to the pancreas and a small portion of the colon. Being, however, thus short, the horse is exempt from a very troublesome and, occasionally, fatal ispecies of rupture, when a portion of the omentum penetrates through some accidental opening in the covering of the belly. The structure of the urinary organs and the diseases to which they are exposed will be hereafter considered. CHOKING. Although choking is rare in the horse as compared with the bovine cribe, it is attended with much greater danger in the former. It generally arises from the impactment of some hard substance either in the larynx or oesophagus, more frequently the latter. Horses that are voracious feeders frequently swallow their food so rapidly that mastication is not half 320 CHOKING. — RUPTURED STOMACH. performed, and portions of it get lodged in the cesophagus, producing chokintr. It may also be caused by tlie animal swallowing pieces of carrot or turnip, sbowing the necessity of always slicing this kind of food into small pieces, when given to the horse. Another source of choking arises from the absurd and dangerous practice of the groom, who, by way of improving the condition of the horse, forces eggs into the animal's throat. The writer has often seen several cases arise from hay being given to the horse, when stopping for gruel or water on the return from huntmg. The animal begins to eat the hay, and before he has had many mouthfuls the gruel or water is brought ; the thirst being great, he plunges his nose into the fluid and drinks rapidly ; by this means a portion of the half-masticated material is carried into the oesophagus, and all the efiects of choking speedily follow. When an animal is choked, the following symptoms will generally be present: — a dejected but somewhat anxious countenance, skin bedewed with perspiration, saliva dropping from the mouth, frequent pawing with the feet, and the animal making attempts to swallow, which brings on a peculiar spasmodic constriction of the neck. The pulse and breathing are accelerated. When water is offered he mil generally drink, but the fluid returns through the nosti'il. The treatment should consist in ascertaining the cause and situation of the obstruction. If it be caused by hay or chaff, attempts should be made to soften it, and hasten its pas- sage, hj frequently drenching the animal with warm water, and linseed oil ; if the obstraction can be felt, careful manipulation may be employed to assist in breaking it up. These means should always be had resort to in the early stages, and, when the obstruction depends upon the above causes, good results will often follow ; but when choking is caused by a hard substance Hke a piece of carrot or an Qgg, recourse must be had to the probang, with a view of pushing it down the oesophagus. It must be borne in mind, however, that the probang is much more difficult and dangerous to pass in the horse than in the ox, in consequence of the bent condition of the animal's neck, and should not be had resort to until nearly every other means had been tried. When even this fails to afford relief, and the position of the obstraction can be ascertained, the operation of oesophogotomy may be performed and the obstructing material removed. The method of performing this will be found under the head of operations. It is seldom attended with good results in the horse, as stricture of the oesophagus very frequently ensues. After the animal has been relieved, great care should be taken respecting the nature of the food which is given to him, as there still remains a gTeat tendency to choke again. For the next four days he should be allowed nothing but sloppy mash, and even after that time considerable caution must be adopted. Rupture of the oesophagus sometimes takes place either from the disten- sion of its coats by the obstructing material, or the passing of the probang or other instrument to remove it. When this takes place we shall find an emphysematous swelling down the neck. Little can here be done, and a fatal termination may be expected. EUPTUEED STOMACH. The situation of the stomach, and the important part it folfils in the di- gestive process, render it liable to inflammation and various other lesions. Simple inflammation of the stomach of the horse is rarely met with, ex- cept as the result of some powerful irritant applied to its surface, and will be more particularly noticed under the head of pjisons. We have already alluded to the effects on this organ produced by the consumption of large quantities of indigestible food under the name of stomach staggers, but the most serious lesion of the stomach is one which, although admitting BOTS. 321 oi" no rrmedial agents being successfully employed, is nevertheless of inucli importance to distinguish from other diseases of the alimentary canal which its symptoms often resemble, viz. rupture of the stomach. It may arise from a variety of causes, such as blows, falls, or any violeni exertion, especially when the stomach is full of food. Corrosive poisons and large numbers of bots have also produced it. But we most com- monly meet with it amongst aged horses as a result of the frequent engorged state of the stomach. It is not uncommon amongst cab horses, when kept out many hours "without the nose-bag, and allowed, a large quantity of food when brought home. The rupture is generally situated on the right side of the stomach, along its greater curvature. The symp- toms of ruptured stomach somewhat resemble those of colic. The animal will give e\4dence of severe pain, by great restlessness, pawing with his feet, lying down and at times raising himself on his haunches, at others resting on his breast. The countenance is distressed but anxious, the body bedewed with perspiration, pulse very quick and feeble, breathing much accelerated. The animal will also make efforts to vomit, and in some instances this has taken place shortly before death ; the vomited material, passing through the nostril, is discharged from the nose. These symptoms will continue for a greater or less time, dependent upon the extent of the rupture. If but a small opening exist, they may last several days ; but if the opening be large, and a considerable quantity of ingesta has escaped into the abdominal cavity, the symptoms will increase rapidly in violence, and the animal frequently dies in convulsions in a few hours. POTS. Bots are a peculiar kind of grub, which at certain seasons are found in considerable quantities adhering to the cuticular lining of the stomach of the horse. The two varieties most generally met with are the oestrus equi or large spotted horse bot, and the oestrus hemorrhoidahs or funda- ment bot. Their history is curious, and we are indebted to Mr. Bracy Clark for almost all we know of them, A species of gad-fly, e, the oesti'us equi, is in the latter part of the sum.- mer exceedingly busy about the horse. It is observed to be darting with great rapidity towards the knees and sides of the animal. The females are depositing their eggs on the hair, and which adhere to it by means of a glutinous fluid with which they are surrounded (a and b). In a few days the eggs are ready to be hatched, and the sKghtest application of warmth and moisture will liberate the Little animals which they contain. The horse in Hcking himself touches the egg, which adheres to the tongue, and is conveyed with the food into the stomach. There it clings to the cuticular portion of the stomach, c, by means of a hook on either side of its mouth ; and its hold is so firm and so obstinate, that it must be broken before it can be detached. It remains there feeding on the mucus of the stomach during the whole of the winter, and ujitil the end of the ensuing spring ; when, having attained a considerable size, d, and being destined to undergo a certain transformation, it disengages itself from the cuticular coat, is carried into the villous portion of the stomach with the food, passes out of it with the chyme, and is evacuated with the dung. The larva or maggot seeks shelter in the gTOund, and buries itself there ; it contracts in size, and becomes a chrysalis or grub, in which state it lies inactive for a few weeks, and then bursting from its confinement, assumes the form of a fly. The female, becoming impregnated, quickly deposits her egffs on those parts of the horse which he is most accustomed to lick, aud thus the species is perpetuated. y 322 BOTS. The smaller or fundament bot, y, is not so frequently found. The fly / in this instance, deposits her eggs on the lips of the horse, and they then a and b The eggs of the gad-fly, adliering to the hair of the horse. c The appearance of the bots on the stomach, firmly adhering by their hookecE mouths. The marks or depressions are seen which are left on the coat of the stomach when the bots are detached from their hold. d The bot detached. e The female of the gad-fly, of the horse, prepared to deposit her eggs. / The gad-fly by which the fundament bot is produced. g The smaller, or fimdament bot. pass through the same stages as the one just described, and quit their habitation at the same season of the year. In their passage with the duno-, however, they not unfrequently adhere to the verge of the anus, and cause a considerable amount of irritation. There are several plain conclusions to be drawn from this history. The bots seldom, while they inhabit the stomach of the horse, give the animal any pain, for they have fastened on the cuticular and insensible coat. They cannot stimulate the stomach, and increase its digestive power, for they are not on the digestive portion of the stomach. They cannot, by their roughness, assist the tritui^ation or rubbing down of the food, for no such office is performed in that part of the stomach — the food is softened, not rubbed down. They are rarely injurious to the horse, for he enjoj^s the most perfect health when the cuticular part of his stomach is filled with them, and their presence is not even suspected until they appear at the anus. They cannot be removed by medicine, because they are not in that part of the stomach to which medicine is usually conveyed : and if they were, their mouths are too deeply buried in the mucus for any medicine, that can safely be administered, to affect them ; and, last of all, in due course of time they detach themselves, and come away. Therefore, the wise man will leave them to themselves, or content himself with pick- ing them off when they collect under the tail and annoy the animal. SPASMODIC COLIC. The passage of the food through the intestinal canal is effected by the alternate contraction and relaxation of the muscular coat of the intestines. When that action is simply increased through the whole of the canal, the food passes more rapidly, and purging is •i)roduced; but the muscles of every part of the frame are liable to irregular and spasmodic action, and Sl'ASMODIC COLIC. 323 the muscular coat of some portion of tlie intestines may be thus affocfced. The spasm may be confined to a very small part of the canal. The gut has been found, after death, strangely contracted in various places, but the contraction not exceeding five or six inches in any of them. In the horse, the ileum is the usual seat of this disease. It is of much importance to distinguish between spasmodic cohc and inflammation of the bowels, for the symptoms have considerable resemblance, although the mode of treatment should be very different. The attack of colic is usually very sudden. There is often not the slightest warning. The horse begins to shift his posture, look round at his flanks, raise his head, curl the upper lip, and make frequent attempts to void his urine ; he will then paw violently, strike his belly with his £eet, and crouch in a pecuhar manner, advancing his hind lunbs under him ; he will then suddenly lie, or rather fall down, and roll himself upon his back, with his feet resting on his belly. The pain now seems to cease for a httle while, and he gets up, and shakes himself, and begins to feed ; the respite, however, is but short — the spasm returns more violently — every indication of pain is increased — he heaves at the flanks, breaks out iiito a profase perspiration, and throws himself more recklessly about. In the space of an hour or two, the spasms begin to relax, and the remissions are of longer duration, and, in the great majority of cases, cease altogether, and the horse shortly resumes his work. Or, on the other hand, when the causes are of a more serious or mechanical natui'e, the torture is augmented at every paroxysm ; the intervals of ease are fewer and less marked, and inflammation and death supervene. The pulse is but little affected at the commencement, but, if relief is not obtained, it becomes frequent and contracted, and at length is scarcely tangible. It will presently be seen that many of the symptoms very closely resemble those of inflammation of the bowels : it may therefore be useful to point out the leading distinctions between them. COLIC. IXTLAMMATION OF TKE BOWELS. Sudden in its attack. Lpss sudden in its approach, with previouo indications of fever. Pulse rarely much quickened in the early Pulse very much quickened, but small, and period of the disease, and during the in- often scarcely to be felt. tervals of ease. Legs and ears of the natural temperature. Legs and ears cold. Relief obtained from rubbing the belly. Belly exceedingly tender and painful to the touch. Intervals of ease. Constant pain. Strength scarcely affected. Eapid and great -weakness. Among the causes of coUc are, the di-inkiug of cold water when the horse is heated. There is not a surer origin of violent spasm than this. Hard water is very apt to produce this effect. Colic will sometimes follow the exposure of a horse to the cold air or a cold wind after strong exercise. Green meat, although, generally speaking, most beneficial to the horse, yet, given in too large a quantity, or when he is hot, will fi'e- quently produce gripes. Doses of aloes, both large and small, are not unfrequent causes of colic. In some horses there seems to be a constitu- tional predisposition to colic. They cannot be hardly worked, or exposed to unusual cold, without a fit of it. In many cases, when these horses have died, calcuU have been found in some part of the alimentary canal. Habitual costiveness and the presence of calculi are frequent causes of spasmodic colic. The seat of colic is occasionally the duodenum, but oftener the ileum or the jejunum ; sometimes, however, both the cacum and colon are affected. 324 FLATULENT COLIC. Fortunately, we are acquainted with several medicines that allay these spasms ; and the disease often ceases almost as suddenly as it appeared. Amongst these, perhaps the best is the tincture of opium and spirit of nitric ether, given in doses of one ounce of the former with two ounces of the latter, in a pint of warm water. Should the spasm not be reheved, this may be repeated in two hours. If the attack proceed from the indi- gestible nature of the food upon which the animal has been feeding, a pint and a half of linseed oil may be given, half an hour after the first dose. The belly should be well rubbed with a brush or hard wisp of straw. The rectum should be unloaded and clysters of warm water ad- ministered. The patent syringe will here be exceedingly useful. A clyster of tobacco -smoke may be thrown up as a last resort. In some instances reHef has been afforded by moving the animal about, but, if this be adopted, he should never exceed a walk. In the majority of cases, however, a loose box, well littered, in which he can he down and roU about, is very much more rational treatment. When relief has been obtained, the clothing of the horse should be removed, his skin rubbed dry, and fresh and dry clothes substituted. He should be well Httered down in a warm stable or box, and have bran mashes and luke-warm water for the two or three next days. Some persons give gin, or gin and pepper, in cases of gripes. This course of proceeding is, however, exceedingly objectionable. It may be useful, or even sufficient, in ordinary cases of cohc ; but if there should be any inflammation, or tendency to inflammation, it cannot fail to be highly injurious. FLATULENT COLIC. This is altogether a different disease from the former. It is not spasm of the bowels, but inflation of them from, the presence of gas emitted by undigested food. Whether collected in the stomach, or small or large intestines, all kinds of vegetable matter are Hable to ferment. In conse- quence of this fermentation, gas is evolved to a greater or less extent — perhaps to twenty or thirty times the bulk of the food. This may take place in the stomach ; and if so, the life of the horse is in immediate danger, for, as will plainly appear from the account that has been given of the oesophagus and upper orifice of the stomach, the animal has no power to exfpel this dangerous flatus by eructation. This extrication of gas usually takes place in the colon and CEecum, and the distension may be so great as to rupture either the one or the other, or sometimes to produce death, without either rupture or strangulation, and that in the course of from four to twenty-four hours. In some ill-conducted establishments, it is a highly dangerous disease, and is especially fatal to horses of heavy di-aught. An overloaded stomach IS one cause of it, and particularly so when water is given either imme- diately before or after a plentiful meal, or food to which the horse has not been accustomed is given. The symptoms, according to Professor Stewart, are, ' the horse sud- denly slackening his pace — preparing to He down, or falling down as if he were shot. In the stable he paws the ground with his fore feet, Hes down, rolls, starts up all at once, and throws himself down again with great violence, looking wistfully at his flanks, and making many fruitless attem.pts to void his urine.' Hithei-to the symptoms are not much unlike spasmodic coHc, but the real character of the disease soon begins to develope itself. It is in one of the large intestines, and the belly swells aU round, but mostly on the INFLAMMATION OF THE BOWELS. 3-26 right flank. As the disease proceeds, the pain becomes more intense, the horse more violent, and at length death closes the scene. The treatment is at first but Httle different fi-om that of spasmodic colic. The gas which causes the swelling in the early stages generally consists of carbonic acid, and here the preparations of ammonia would be of great service ; one ounce of tincture of opium combined with two ounces of aromatic spirit of ammonia should be given in a quart of cold water, and repeated if necessary. As the disease progresses, combinations of hydi'ogen are generated, and the preparations of chlorine, such as the chloride of lime and the chlorate of potash, may be advantageously em- ployed. If some compound of chloi'ine, dissolved in water, is administered in the form of a drink, the chlorine unites with the hydrogen, and muriatic gas is fonned. This gas, having a strong affinity for water, is absorbed by any fluid that may be present, and quitting its gaseous form, either disappears, or does not retain a thousandth part of its former bulk. All this may be very rapidly accomphshed, for the fluid is quickly con- veyed from the mouth to every part of the intestinal canal. This should speedily be followed by four or five drachms of aloes in solution, with copious and repeated injections. As a last resource, when the danger is imminent and every other means have been tried withoiit success, the trochar may be used, in order to open a way for the escape of the gas. The trochar should be small, but longer than that which is used for the cow, and the puncture should be made in the middle of the right flank, for there the large intestines are most easily reached. In such a disease it cannot be expected that the intestines shall always be found precisely in their natui-al situations, but usually the origin of the ascending portion of the colon, or the base of the caecujn, will be pierced. Much of the danger would be avoided by using a very small trochar, and by withdrawing it as soon as the gas has escaped. The wound in the intestines will then probably close, fi'om the innate elasticity of the parts, INFLAMMATION OF THE BOWELS. There are two varieties of this malady. The first is inflammation of the external coats of the intestines, accompanied by considerable fever, and usually costiveness. The second is that of the internal or mucous coat, and almost invariably connected with purging, ENTEEITIS. Inflammation of the external coats of the intestines, whether the peri- toneal or muscular, or both, is a frequent and very fatal disease. The causes of this disease are, first of all and most frequently, sudden exposure to cold. If a horse that has been highly fed, carefully groomed, and kept in a warm stable, is heated with exercise, and has been during some hours without food, and in this state of exhaustion is suffered to drink freely of cold water, or is drenched with rain, or have his legs and belly washed with cold water, an attack of inflammation of the bowels will often follow. An over-fed horse, subjected to severe and long-con- tinued exertion, if his lungs were previously weak, Avill probably be at- tacked by inflammation of them ; but if the lungs were sound, the bowels will on the following day be the seat of disease. Stones in the intestines are an occasional cause of inflammation, and colic neglected or wrongly treated will terminate in it. It speedily runs its course, and it is of great consequence that its eai'ly symptoms should be known. If the horse has been carefully observed, restlessness and fever will have been seen to pre- cede the attack. In many cases a direct shivering fit will occur : the 326 ENTERITIS. moutli will be hot, and the nose red. The animal will soon expi-ess the most dreadful pain by pa-n-ing, striking at his belly, looking wildly at his flanks, gToaning, and rolling. The pulse will be quickened and wiry; the ears and legs cold ; the belly tender, and sometimes hot ; the breath- ing quickened ; the bowels costive ; and the animal becoming rapidly and fearfully weak. Tbe reader will probably here recur to the sketch given in page 323 of the distinction between spasmodic coHc and inflammation of the bowels, or enteritis. The horse paws and stamps as in coHc, but without the intervals of ease that occur in that disease. The pulse also is far quicker than in colic. The breathing is more hurried, and the indication of sufiering more evident. ' The next stage,' in the grapliic language of ^Ir. Percivall in his Hippopathology, ' borders on delirium. The eye acquires a wild, haggard, unnatural stare — the pupil dilates — his heedless and dreadful thi'oes render approach to him quite perilous. He is an object not only of compassion but of apprehension, and seems fast hurrying to his end ; when, all at once, in the midst of agonising torments, he stands quiet, as though every pain had left him, and he were going to recover. His breathino' becomes tranquilHsed — his pulse sunh: beyond all perception — his body bedewed with a cold clammy sweat — he is in a tremor from head to foot, and about the legs and ears has even a dead-like feel. The mouth feels deadly chill ; the Hps drop pendulous ; and the eye seems unconscious of objects. In fine, death, not recovery, is at hand. Mortifi- cation has seized the inflamed bowel — pain can no longer be felt in that which a few minutes ago was the seat of exquisite suffering. He again becomes convulsed, and in a few more struggles less violent than the former he expires.' The course of the disease, fortunately for the sufi"erings of the poor beasts aSlicted with it, is a short one ; death may supervene in foi'ty-eight, twenty-four, or even twelve hours — it may be considered the most fatal disease of the horse. The treatment of inflammation of the bowels, like that of the lungs, should be prompt and energetic. The first and most powerful means of cure will be bleeding. From sis to eight or ten quarts of blood, in fact as much as the horse can bear, should be abstracted as soon as possible. The speedy weakness that accompanies this disease should not deter from bleeding largely. The weakness is the consequence of violent inflamma- tion of these parts ; and if that inflammation is subdued by the loss of blood, the weakness will disappear. The bleeding should be efi"ected on the first appearance of the disease, for there is no malady that more quickly runs it course. A full dose ( 5 i. to 5 ij. of opium) should immediately follow the bleeding; this may be repeated every four or five hours if necessary, but, considering the ii-ritable state of the intestines at this period, purgatives should not be given. After the patient has somewhat recovered we may however give a small dose of oil. Back-raking, and injections, consisting of warm water or very thin gruel, should be early resorted to ; and too much fluid can scarcely be thl■o^vn up. Kthe common ox-bladder and pipe is used, it should be frequently replenished ; but vdih Read's patent pump, already referred to, sufficient may be injected to penetrate beyond the rectum, and reach to the colon and caecum, and dispose them to evacuate their contents. Enemas of tobacco-smoke may be also administered. It will now be prudent to endeavour to excite considerable external in- flammation as near as possible to the scat of internal disease, and therefore the whole of the belly should be bUstered. In a well-marked case of this disease, no time should be lost in applying fomentations, but the blister at ENTERITIS. 39J once resorted to. The tincture of Spanisli flies, made mth turpentine, Bhould be tlaorouglalj rubbed in. The legs should be well bandaged in order to restore the cii'culation in them, and thus lessen the flow of blood to the inflamed part ; and, for the same reason, the horse should be warmly clothed ; but the air of the stable or box should be cool. The horse should be encouraged to drink plentifully of wann water or thin gruel, and no corn or hay should be allowed during the disease, but bran mashes, and gi'een meat if it can be procui'ed. The latter will be the best of all food, and may be given without the slightest apprehension of danger. 'When the horse begins to recover, a handful of com may be given two or three times in the day ; and, if the weather is warm, he may be txirned into a paddock for a few hours in the middle of the day. Clysters of gruel should be continued for three or four days after the inflammation is beginning to subside, and good hand-rubbing applied to the legs. The second variety of inflammation of the bowels affects the internal or mucous coat, and is generally the consequence of phj^sic in too great quantity, or of an improper kind. When the mucous membrane is in an irritable condition, or from sym- pathy, as in inflammation of the lungs, a small dose of purgative medicine "vvill sometimes produce this disease. The purging is more violent and continues longer than was intended ; the animal shows that he is suffering great pain ; he frequently looks round at his flanks ; his breathing ia laborious, and the pulse is quick and small — not so small, however, as in inflammation of the peritoneal coat, and, contrary to some of the most frequent and chai-acteristic symptoms of that (^sease, the mouth is hot, and the legs and ears are warm. Unless the purging is excessive, and the pain and distress great, the surgeon should hesitate at giving any astringent medicine at first ; but he should plentifully administer wheat-flour gniel, or arrow-root, or thin starch ; removing all hay and corn, and particularly green meat. He should thus endeavour to soothe the irritated surface of the bowels, while he permits all remains of the purgative to be carried ofl', If, however, twelve hours have passed, and the pui'ging and the pain re- main undimiuished, he should continue the gruel, adding to it chalk, catechu, and opium, repeated every six hours. As soon as the purging begins to subside, the astringent medicine should be lessened in quantity, and gradually discontinued. The horse should be warmly clothed and placed in a comfortable stable, and his legs should be hand-rubbed and bandaged. Violent purging, and attended with much inflammation and fever, will occur from other causes. Green meat Avill frequently purge. A horse worked hard upon gTeen meat will sometimes scour. The remedy is change of diet, or less labour. Young horses vdll often be strongly purged, without any apparent cause. Astringents should be used with much cau- tion here. It is probably an effort of nature to get rid of something that offends. A few doses of gruel will assist in effecting this purpose, and the purging will cease Avithout astringent medicine. Many horses that are not well-rihhed home — having too great space between the last rib and the hip-bone — are subject to purging if more than usual exertion is required from them. They are recognised by the term of ivashy horses. They are often free and fleet, but destitute of con- tinuance. They should have rather more than the usual allowance of corn, ^vith beans, when at work. A cordial ball, with catechu and opium, will often be serviceable either before or after a journey. 328 PHYSICKING. PHYSICKING. Tliis would seem to be the proper place to speak of physicking horses — a mode of treatment necessary under various diseases, often useful for the augmentation of health, and yet which has often injured the constitu- tion and absolutely destroyed thousands of animals. When a horse comes from grass to hard meat, or from the cool open air to a heated stable, a dose or even two doses of physic may be usefal to prevent the tendency to inflammation which is the necessary consequence of so sudden and great a change. To a horse that is becoming too fat, or has surfeit, or grease, or mange, or that is out of condition fi'om inactivity of the digestive organs, a dose of physic is often most serviceable ; but the reflecting man will enter his protest against the periodical physicking of all horses in the spring and the autumn, and more particularly against that severe system which is thought to be necessary in order to train them for work, and also the absurd method of treating the animal when under the operation of physic. A horse should be carefully prepared for the action of physic. Two or three bran mashes given on that or the preceding day are far from saflB.- cient when a horse is about to be physicked, whether to promote his condition or in obedience to custom. Mashes should be given until the dung becomes softened. A less quantity of physic will then suflice, and it will more quickly pass through the intestines, and be more readily diffused over them. Four drachms of aloes, given when the dung has thus been softened, will act much more eflectually and much more safely than seven drachms, when the lower intestines are obstructed by hardened faeces. The best time to give physic is about eleven o'clock in the morning, as it then usually begins to operate early on the following day, and an oppor- tunity is better afforded of watching the animal, in case he should be griped, than in the night. On the day after the physic is given, the horse should have walking exercise for a quarter of an hour, trw'o or three times in the day ; but after the physic begins to operate freely he should not be moved from his stall. Exercise would then produce gripes, irritation, and possibly dangerous inflammation. As much mash should be given as the horse ^vill eat, and as much water, with the coldness of it taken off, as he will drink. K, however, he obstinately refuses to drink warm water, it is better that he should have it cold, than to continue without taking any fluid. Eight or ten tolerably copious motions will be perfectly sufficient to answer every good purpose, although the groom or the carter may not be satisfied unless double the quantity are procured. The consequence of too strong purgation will be, that weakness ^vill hang about the animal for several days or weeks, and inflammation wdll often ensue from the over- irritation of the intestinal canal. Long- continued custom has made aloes the almost invariable purgative of the horse, and very properly so ; for there is no other at once so sure and sc safe. The Barbadoes aloes, although sometimes very dear, should alone be used. The dose, with a horse properly prepared, will vary fi-om four to six drachms. The preposterous doses of nine, ten, or even twelve drachms, are now, happily for the horse, generally abandoned. Custom has assigned the form of a ball to physic, and very properly, for it can be so given with certainty, and without annoyance to the animal, while in the form of a draught there is both annoyance to the horse and a waste of the medicine ; but there is good sense in having recourse to the solution of aloes, as acting more speedily, effectually, and safely in cases of sickness, when it has to be given in small doses and frequently repeated. CALCULI, OR STONES, IX THE INTESTINES. '62b The only otlier purgative on -\vliicli dependence can be placed is the CROTON. The farina or meal of the nat is generally used ; but from its acrimony it should be given in the form of ball, with linseed meal. The dose varies from a scruple to half a di-achm. It acts more speedily than the aloes, and without the nausea which they produce ; but it causes more watery stools and, consequently, more debility. Linseed- OIL is an uncertain but safe purgative, in doses from a pound to a pound and a half. Olive-oil is more uncertain, but safe ; but castor-oil, that mild aperient in the human being, is both uncertain and unsafe. Epsom-salts are inefficacious, except in the immense dose of a pound and a half, and then they are not always safe. CALCULI, OB STONES, IN THE INTESTINES. These are a cause of inflammation in the bowels of the horse, and more frequently of colic. They are generally found in the caecum or colon, varying considerably in shape according to the nucleus round which the sabulous or other earthy matter collects, or the form of the cell in which they have been lodged. They differ in weight, from an ounce to between thu-ty and forty pounds, and in size vary from a small marble to a man's head. When small, they are occasionally found in considerable numbers, but when of the larger size, there is rarely more than one. From the horizontal position of the carcase of the horse, the calculus, when it begins to form, does not gravitate as in the human being, and therefore calculous concretions remain and accumulate until their very size prevents their expulsion, and a fatal ii-ritation is too frequently produced by their motion and weight. They are oftenest found in heavy draught, and in millers' horses. In some of these horses they have the appearance oi gi'it-stone or crystallised gneiss. It is probable that they partly consist of those very minerals, combined with the bran which is continually float- ing about. An analysis of the calculi favours this supposition. They are a soui-ce of continual irritation wherever they are placed, and are a fruitful cause of colic. Spasms of the most fearful kind have been clearly traced to them. Professor Morton, of the Royal Veterinary College, — in his valuable Essay on Calculous Concretions, — gives an interesting account of these substances in the intestinal canal of the horse. Intestinal calculi are composed of the phosphates of lime, magnesia, and ammonia, combined "vvith animal matter ; the phosphates are deposited fi'om the food, when digestion is not sufficiently complete for them to be completely dissolved and carried into the circulation. Little advance has been or can be made to procure their expulsion, or even to determine their existence ; and even when they have passed into the rectum, although some have been expelled, others have been so fimdy impacted as to resist all mechanical means of withdrawal, and a few have broken their way through the parietes of the rectum, and lodged in the abdominal cavity. Mr. Percivall, in his ' Ele- mentary Lectures on the Veterinary Art,' has recorded several fearftd cases of this. Other concretions are described under the head of oat-hair calculi. Their surface is tuberculated and their fonns irregular. They are usually with- out any distinct nuclei, and are principally composed of the hairy material which exists on the glume of the oat. They are moderate in size, brown in colour, soft, semi-elastic, and flesh-like in feel ; this feeling depends on the principal ingredients, a number of minute hairs which invest the oat, combined with a poi-tion of earthy matter, and inspissated mucus. The professor very properly adds, and it is a circumstance which deserves 880 INTEOSUSCEPTION OP THE INTP:STINES. mucli consideration, tliat sucli oats as are liusky, -vvitli a deficiency of fari- naceous matter, are likely to give rise to these accumulations, "vrlienever impaired digestion exists. It is also an undoubted fact, that a great pro- portion of horses affected with calculi are the property of millers, or brewers. A thu'd species of concretion too frequently existing is the dung-hall, or mixed calculus. It is made up of coarse, indigestible, excre- mentitious matter, mixed with portions of the ' oat-hair calculus,' and many foreign substances, such as pieces of coal, gravel, &c., and the whole agglutinated together. They are commonly met with in horses that are voracious feeders, and mingled with particles of coal and stone. INTROSUSCEPTION OF THE INTESTINES. The spasmodic action of the ileum being long continued may have been occasioned, or may be succeeded, by an inverted one from the caecum towards the stomach, more powerful than in the natural direction ; and the contracted portion of the intestine will be thus forced into another above it that retains its natural caHbre. The irritation caused by this increases the inverted action, and an obstruction is formed which no power can overcome. Even the natural motion of the bowels will be sufficient to produce introsusception, when the contraction of a portion of the ileum is very great. There are no symptoms to indicate the presence of this, except continued and increasing pain. Introsusception is not confined to any particular situation. A portion of the jeiunum has been found invaginated within the duodenum, — and also within the ileum, and the ileum within the caecum, — and one portion of the colon within another, and within the rectum. The ileum and jejunum are occasionally invaginated in various places. More than a dozen distinct cases of introsusception have occurred in one animal, and sometimes unconnected with any appearance of inflammation, but in other cases, or in other parts of the intestinal canal of the same animal, there ^\t11 be inflammation of the most intense character. In the majority of cases, perhaps it is an accidental consequence of pre-existing disease, and occasioned by some irregular action of the muscular tunic, or some irri- tation of the mucous surface. An equally formidable, but not so frequent disease, is ENTANGLEMENT OF THE BOWELS. This is another and singular concomitant of colic. Although the ileum is enveloped in the mesentery, and its motion to a considerable degi'ee confined, yet under the spasm of colic, and during the violence with which "the animal rolls and throws himself about, portions of the intestine may become so entangled as to be twisted into nooses and knots, drawn to- gether with a degree of tightness scarcely credible. Nothing but the extreme and continued torture of the animal can lead us to suspect that this has taken place, and, could we ascertain its existence, there would be no cure. An interesting case occurred in the practice of !Mr. Spooner of South- ampton. A mare at grass was suddenly taken ill. She discovered symptoms of violent colic, for which anti-spasmodic and aperient medicines were promptly administered, and she was copiously bled. The most active ireatment was had recourse to, but without avail, and she died in less than four-and-twenty hours without a momentary rehef from pain. The small intestines were completeley black from inflammation, and portions of them were knotted together in the singular way delineated in ■the subjoined cut. The parts are a little loosened in order better to show the WOKMS. 331 entanglement of the intestines, but in tlie animal tliey were drawn into a tight knot, and completely intercepted all passage. WORMS. Worms of diflFerent kinds inhabit the intestines ; but, except when they exist in very great numbers, they are not so hurtful as is generally sup- posed, although the groom or carter may trace to them hidebound, and cough, and loss of appetite, and gripes, and megrims, and a variety oi other ailments. Of the origin or mode of propagation of these parasitical animals we can say little ; neither writers on medicine, nor even on natural history, have given us any satisfactory account of the matter. The long white worm (lumbricus teres), much resembling the common earth-worm, and being from six to ten inches in length, inhabits the small intestines. It is a formidable-looking animal, and if there are many of them they may consume more than can be spared of the nutritive part of the food or the mucus of the bowels. A tight skin, and rough coat, and tucked up belly, are sometimes connected -with their presence. They are then, however, voided in large quantities. A smaller, darker- coloured worm, called the needle-worm, or ascaris vermicularis, inhabits the large intestines. Hundreds of them sometimes descend into the rectum, and immense quantities have been found in the caecum. These are a more serious nuisance than the former, for they cause a very troublesome irritation about the fundament, wdiich sometimes sadly annoys the horse. In the treatment for the expulsion of worms an immense variety of remedies have been employed, many of which are calculated to do serious mischief to the animal. Large doses of aloes, calomel, tartar emetic, arsenic, corrosive sublimate, powdered glass, pewter tin scraped fine, &c., have each had their advocates as vermifuges. But in the treatment for the removal of these parasites it should not be forgotten that the intestinal canal is their natural habitation, and unless from some peculiarity of the system they accumulate in large quantities, they arc not hkcly to produce 3J2 HERNIA, OR RUPTURE miscliief. Perhaps there is no cause to which their undue influence can more generally be traced than a debilitated condition of the animal, whether as a result of age, the bad quality of the food upon which he has been kept, or disease. Bearing this in mind, our chief effort in treatment should consist in restoring the general vigour of the system. The animal should be well attended to, and kept on the most nutritious foods, such as oats, or beans, and good hay ; a bran mash should also be allowed twice a week. Our medicinal agents should consist of the early administration of a pint and a half of linseed oil, which may be repeated every ten days for three times. A drachm also of powdered sulphate of iron should be given every night, for a fortnight, in the animal's food. By these means we shall frequently succeed in sufficiently restoring the general health of the animal to produce their expulsion, without running the risk of doing that injury which by the employment of many of those agents above mentioned we are Hable to produce. HERNIA, OB, RUPTURE. A portion of the intestine protrudes out of the cavity of the belly, either through some natural or artificial opening. In some cases it may be returned, but from the impossibility of applying a truss or bandage it soon escapes again. At other times the opening is so narrow that the gut, gra- dually distended by gas or feeces, or thickened by inflammation, cannot be returned, and strangulated hernia is then said to exist. The seat of hernia is either in the scrotum of the perfect horse, or the canal leading to it — this is called inguinal, or scrotal ; or at the navel in the centre of the ab- domen— this is umbihcal hernia ; then there are hernia arising from wounds or bruises, and these are most frequently found in the flank, and are known as ventral hernia ; and occasionally there is rupture of and hernia through the diaphragm, called diaphragmatic. The causes are violent struggling when under operations, over- exertion, kicks, or ac- cidents. The assistance of a veterinary surgeon is here indispensable. The following case of operation for hernia will be acceptable to the owner of horses as well as to the veterinary surgeon. It occurred in the practice of Professor Simonds, of the Royal Yeterinaiy College. We extract this account of it from ' The Veterinarian.' ' The patient was an aged black cart-mare, that had been lent by the owner to a neighbour for a day or two. I cannot speak positively as to the cause of the injury which she received, but I believe that it resulted from her falling in the shafts of a cart laden with manure. She was brought to my infirmary on the next day, October 18, 1837. ' The most extensive ruptui'e I had ever seen presented itself on the left side. The sac formed by the skin, which was not broken, nor even the hair rubbed off, extended as far forwards as the cartilages of the false ribs, and backwards to the udder. A perpendicular line drawn from the superior to the inferior part of the tumour measured more than twelve inches. It appeared, from its immense size and weight, as if by far the larger part of the colon had protruded. ' To my surprise, there was comparatively Httle constitutional dis- turbance. The pulse was 45, and full, with no other indication of fever, and no expression of pain on pressing the tumour. ' She was bled until the pulse was considerably lowered. A cathartic was given, and the sac ordered to be kept constantly wet with cold water, and to be supported with a wide bandage. She was placed on a restricted and mash diet. ' On the next day, being honoured with a visit by Messrs. Morton, Spooner, and Youatt, I had the pleasure and advantage of submitting the HERNIA, OK RUPTURE. 333 case to their examination, and obtaining their opinion. They urged me to attempt to return the protruding viscera, and secure them by a surgical operation ; and Mr. Spooner kindly offered to be present, and to give me his valuable assistance. ' On the 24th, our patient was considered to have had sufficient prepa- ratory treatment, and she was operated upon. We availed oui'selves of the opportunity of putting to the test that which some among us had doubted, and others had positively denied, but which had always been maintained by our talented chemical lecturer — the power of opium to lull the sensation of pain in the horse. We therefore gave her two ounces and a half of the tincture of opium, shortly before she was led from the box to the operating house, and the power of the drug was evident through the whole of the operation. ' After a careful examination, externally, as well as per rectum, in order to ascertain the situation and probable size of the laceration of the muscles, an incision was carefully made tkrough the integument into the sac, in a line with the inferior border of the cartilages of the false ribs, which in- cision was about seven inches in length. This, as we had hoped, proved to be directly upon the aperture in the muscular parietes of the abdomen. The intestines were exposed ; and, after having sufficiently dilated the opening to permit the introduction of the hand, they were quickly returned, portion after portion, into their proper cavity, together with a part of the omentum, which we found somewhat annoying, it being frequently forced back again through the laceration. ' At times it required the exertion of our united strength to prevent the escape of the intestines, and which was only effected by placing our hands side by side, covering and pressing upon the opening. By these means we succeeded in keeping in the viscera, until we were satisfied that we had placed them all within their proper cavity. At about the central part of the aperture, we decidedly found the greatest pressure of the in- testines to effect an escape. ' A strong metallic sutui'e of flexible wire was then passed through the edges of the laceration, taking in the peritoneum and portions of the transversalis, rectus, and internal abdominal muscles ; and other sutures, embracing the same parts, were placed at convenient distances, so as nearly to close the aperture. Two sutures of smaller metallic wire, and three of stout silk cord, were then passed through the external abdominal muscles, and their aponeuroses, which effectually shut up the opening into the abdomen. The integument was then brought together by the interrupted suture, taking care to bring out the ends of the other sutures, and which had been purposely left long, so that in case of supervening inflammation, or swelHng, they might be readily examined. The whole operation occupied rather less than an hour, our poor patient being occasionally re- freshed with some warm gruel. ' The hobbles were now quietly removed, and, after lying a few minutes, she got up, and was placed in a large loose box. A compress and a sus- pensory bandage, that could be tightened at pleasure, were applied to the wound. The result was very satisfactory, and at the end of three months she returned to her usual work.' In umbilical hernia we get a protrusion of the intestines into the um- bilicus. On examination, a tumour varying in size will be found about the centre of the abdomen, which is soft to the feel, and can generally be reduced by pressure, when the rounded edges of the peritoneal cavity from which the intestine has escaped will be distinctly felt. By way of treatment, persistent pressure, in the form of a tmss, will sometimes be eflfectual ; but the following method will generally be attended with the 334 HEPATITIS. greatest success : — Tlie animal should be kept witliout food for twelve hours, and then cast, and placed upon his back, the intestine pushed back into its proper place. A piece of skin should then be gathered up, and a ligature placed tightly round it. With a view of preventing the ligature slipping off, two small iron skewers are sometimes passed transversely through the skin, and the ligature tied above them. In a short time the piece of skin will slough off, and permanent obliteration of the sac, and closure of the opening into the abdominal cavity, vrill generally follow. DISEASES OF THE LIVER. As veterinary practice has improved, much light has been thrown on the diseases of the liver — not perhaps on the more advanced and fatal stages ; but giving us the promise that, in process of time, they may be detected at an earlier period, and in a more manageable state, SOFTENING AND RUPTURE OF THE LIVER. If horses, destroyed on account of their complaints, are examined when they are not more than five years old, the liver is usually found in the most healthy state ; but when they arrive at eight or nine or ten years this viscus is frequently increased in size — it is less elastic under pressure — it has assumed a granulated or broken dowTi appearance — the blood does not so readily permeate its vessels, and at length, in a greater or less quantity, it begins to exude, and it is either confined under the peritoneal covering, or oozes into the cavity of the belly. There is no- thing for awhile to indicate the existence of this. The horse feeds well, is in apparent health, in good condition, and capable of constant work, notwithstanding so fatal a change is taking place in this important viscus ; but, at length, the peritoneal covering of the liver suddenly gives way, and the contents of the abdomen are deluged with blood, or a suflB.cient quantity of this fluid has gradually oozed out to interfere vsdth the func- tions of the viscera. The symptoms of this sudden change are pawing, shifting the posture, distension of the belly, curling of the upper lip, sighing frequently and deeply, the mouth and nostrils pale and blanched, the breathing quickened, the pulse flagging or imperceptible, restlessness, debility, fainting, and death. On opening the abdomen, the intestines are found to be deluged with dark venous blood. The liver is either of a fawn, or light yellow, or brown colour — easily torn by the finger, and, in some cases, completely broken down. This affection is comparatively very rare in the country, but in the metropolis is of no unfrr-^uent occurrence. If the haemorrhage has been slight at the commencement, and fortu- nately arrested, yet a singular consequence will frequently result. The sight vfill gradually fiiil : the pupil of one or both eyes will gradually dilate, the animal wUl have gutia serena, and become perfectly bhnd. This will almost assuredly take place on a return of the affection of the liver. Little can be done in a medical point of view. Astringent and styptic medicines may, however, be tried. Turpentine, alum, or sulphuric acid, will afford the only cliance. The vetennary world is indebted to the late Mr. John Field for much that is known of this sad disease. HEPATITIS INFLAMMATION OF THE LIVER. This may consist in inflammation either of the capsule of the liver or of its internal structures, or more often of both. It is rare in the horse, compared with mnn, and may be looked upon as an obstinate and fre- JAUNDICE. 33& quentlj fatal disease. It will ansa from a variety of causes, sucli as a plethoric state of the system, induced by high feeding and want of exer- cise, over-exertion especially in hot weather, injuries to the side, and sym- pathy with other inflamed organs, as the lungs or bowels. In the early 6tages of the disease the animal will generally be found dull, and off his feed ; he will give evidence of abdominal pain, by restlessness and fre- quently looking at his sides, but not so much as in enteritis. The breath- ing and pulse Avill also be slightly increased. As the disease progresses the internal membrane of the mouth, nose, and eyes will become of a yellow colour, the bowels are constipated, and the small quantities of hard fteces voided, will be of a clayish yellow colour. The urine also will be highly coloured with bile. The animal will now give e\'idence of pain, on pressure being applied to the right side, over the region of the liver ; lameness of the off fore-limb will also occasionally be present. If the symptoms go on increasing in severity, and no relief be afforded, a fatal termination will probably be the result in eight or ten days. Our treat- ment should consist in the immediate abstraction of blood to the extent of five or six quarts. This should be at once followed by 5i- calomel, with 5iij. to ^iv. aloes. Counter- irritation, also, in the form of a blister, should be applied to the right side. The animal should be placed in a cool well-ventilated stable, kept as quiet as possible, and allowed nothing in the shape of food, except bran mash, and linseed or oatmeal gruel. If the symptoms yield to treatment, and the animal begins to recover, he should for some time be kept on light, nutritious foods. Vegetable tonics may also be given to restore the tone of the digestive system, gTcat atten- tion being paid to the state of the bowels. JAUNDICE, Commonly called the yellows, is a more frequent, but more tractable disease. It is the introduction of bile into the general circulation. This is usually caused by some obstruction in the ducts or tubes that convey the bile from the liver to the intestines. The horse, however, has but one duct, through which the bile usually flows as quickly as it is formed, and there is no gall-bladder. Jaundice does, however, occasionally appear, either from an increased flow or altered quality of the bile, or obstruction even in this simple tube. The yello^vness of the eyes and mouth, and of the skin where it is not covered with hair, mark it sufficiently plainly. The dung is small and hard ; the urine highly coloured ; the horse languid, and the appetite impaired. If he is not soon relieved, he sometimes be- gins to express considerable uneasiness ; at other times he is dull, heavy, and stupid. A characteristic symptom is lameness of the right fore-leg, resembling the pain in the right shoulder of the human being in hepatic affections. The principal causes are over-feeding or over-exertion in sultry weather, or too Httle work generally speaking, or inflammation or other disease of the fiver itself. It is first necessary to enquire whether this affection of the liver is not the consequence of the sympathy of that organ with some other part, for, to a very considerable degree, it frequently accompanies inflammation of the bowels and the lungs. These diseases being subdued, jaundice will disappear. If there is no other apparent disease to any great extent, an endeavour to restore the natural passage of the bile by pui-gatives may be tried — not consisting of large doses, lest there should be some undetected inflammation of the lungs or bowels, in either of which a strong purgative would be dangerous ; but given in small quantities, repeated at short intervals, and until the bowels are freely opened. Plenty of water slightly wanned, or thin gruel, should bo given. The horse should he S86 THE KIDNEYS. warmly clotbed, and tiie stable well ventilated, but not cold. Carrots or green meat will be very beneficial. Should the purging, when once ex- cited, prove violent, we need not be in any haste to stop it, unless inflam- mation is beginning to be connected with it, or the horse is very weak. The medicine recommended under diarrhoea may then be exhibited. A few shght tonics should be given when the horse is recovering from an attack of jaundice. The Spleen is sometimes very extraordinarily enlarged, and has been iTiptirred. We are not aware of any means by which this may be dis- covered, nor any treatment calculated to afibrd relief. THE KIDNEYS. The blood contains a great quantity of watery fluid unnecessary for the nutriment or repair of the frame. There likewise mingle with it matters that would be noxious if sufiered to accumulate too much. The kidneys ai*e actively employed in separating this fluid, and likewise carrying ofi" a substance which constitutes the peculiar ingredient in urine, called the urea, and consisting principally of that which would be poisonous to the animal. The kidneys are two large oval glandular bodies, placed under the loins, of the shape of a kidney-bean, of immense size. The right kidney is most forward, lying behind the liver ; the left is more backward. A large arteiy runs to each, carrying not less than a sixth part of the whole of the blood that circulates through the frame. This artery is divided into innumerable little branches most curiously complicated and coiled upon each other, and the blood, traversing these convolutions, has its watery parts, and others the retaining of which would be injurious, separated fi-om it, and, thus separated, passes into a muscular membranous tube connected with the pelvis of each kidney, and is conveyed through them into the bladder. This fluid varies ruaterially both in quantity and composition, even during health. There is no animal in which it varies so much as in the horse — there is no organ in that animal so much under our command as the kidney ; and no medicines are so useful, or may be so injurious, as diuretics — not only on account of their febrifuge or sedative efiects, but because of the power which they exert. They stimulate the kidneys to separate more aqueous fluid than they otherwise would do, and thus lessen the quantity of blood which the heart is labouring to circulate through the frame, and also that which is determined or driven to parts already overloaded. The main objects to be accomphshed in these diseases is to reduce the force of the circulation, and to calm the violence of ex- citement. Diuretics, by lessening the quantity of blood, are useful assistants in accomplishing these purposes. At the anterior edges of the kidneys are two vascular bodies called the renal capsules, large and of a deep red colour in fcetal bfe, while in maturity they are smaller and Hghter in colour : their functions are unknown. The horse is subject to eSusions of fluid in particular parts. Swelled legs are a disease almost peculiar to him. The ox, the sheep, the dog, the ass, and even the mule, seldom have it, but it is for the removal of this deposit of fluid in the cellular substance of the legs of the horse that we have recourse to diuretics. The legs of many horses cannot be rendered fine, or kept so, without the use of dinretics ; nor can grease — often connected with these swellings, producing them or caused by them — be otherwise subdued. It is on this account that diuretics are ranked among the most useful of veterinary medicines. In injudicious hands, however, these medicines are sadly abused INFLAMMATION OF THE EIDNEYS. '6ii7 A mong the absurdities of stable-management tLere is notliing so injurious a&i the frequent use of diuretics. Not only are the kidneys often over- excited, weakened, and disposed to disease, but the whole frame becomes debilitated ; for the absorbents have carried away a great part of that which was necessary to the health and condition of the horse, in order to supply the deficiency of blood occasioned by the inordinate discharge of urine. There is likewise one impoi-tant fact of which the groom or the horseman seldom thinks, viz. : — That, when he is removing these humours by the imprudent use of diuretics, he is only attacking a symptom or a consequence of disease, and not the disease itself. The legs Avill fill again, and the grease will return. While the cause remains, the effect will bo produced. In the administration of diuretics, one thing should be attended to, and the good effect of which the testimony of every intelligent man will con- firm : the Iwrse sliould have plenty to drinh. Not only will inflammation be prevented, but the operation of the medicine wiU be much promoted. NEPHRITIS INFLAMMATION OF THE KIDNEYS. This is no uncommon disease in the horse, and is more unskilfally and fatally treated than almost any other. The early symptoms are those of fever generally, but the seat of the disease soon becomes evident. The horse looks anxiously round at his flanks ; stands with his hinder legs wide apart ; is unwilling to lie down ; straddles as he walks ; expresses pain in toi'ning ; shrinks when the loins are pressed, and some degree of heat is felt there. The ui'ine is voided vii small quantities ; frequently it is high-coloured, and sometimes bloody. The attempt to urinate becomes more frequent, and the quantity voided, smaller, until the animal strains painfully and violently, but the discharge is nearly or quite suppressed. The pulse is quick and hard ; full in the early stage of the disease, but rapidly becoming small, yet not losing its character of hardness. These symptoms clearly indicate an affection of the urinary organs ; but they do not distinguish inflamm.ation of the kidney from that of the bladder. In order to efilsct this, the hand must be inlToduced into the rectum. If the bladder is felt fall and hard under the rectum, there is inflammation of the neck of it ; if it is empty, yet on the portion of the intestines imme- diately over it there is more than natural heat and tenderness, there is inflammation of the body of the bladder ; and if the bladder is empty, and there is no increased heat or tenderness, there is inflammation of the kidney. The causes of this disease are, too powerful or too often repeated diuretics, which induce inflammation of the kidney, or a degree of irritation and weakness of that organ that disposes to inflammation, from causes that otherwise would have no injurious efi'ect. K a horse is sprained in the loins, by being urged on, far and fast, by a heavy rider, or compelled to take too wide a leap, or by being suddenly pulled up on his haunches, the uiflammation is often transferred from the loins to the kidneys, with which they lie in contact. Exposure to cold is another frequent origin of this malady, especially if the horse is drenched with rain, or the wet di'ips upon his loins ; and more particularly, if he was previously disposed to inflammation, or these organs had been previously weakened. For this reason, coach and cab horses, and others exposed to the vicissitudes of the weather, should have theii' loins protected by some waterproof cover- ing. It may also be produced by some irritating agent, contained in the food on which the animal is fed, such as dark mow-burnt hay, or what are called foxy oats, &c. The chief cause, however, of nephritis, is the unnecessary quantity, or z a38 DIABETES, UK PKOFUSE STALING. undue strength, of the diuretic medicines that are given by ignorart grooms, Tlus is an evil carried to a most injurious extent, and which every horseman should positively forbid. The treatment will only vary from that of inflammation of other parts, by a consideration of the peculiarity of the organ affected. Bleeding must be promptly resorted to, and carried to its full extent. An active purge should next be administered ; and a counter-inflammation excited pa nearly as possible to the seat of disease. For this pui'pose the loins should be fomented with hot water, or covered with a mustard-poultice — the horse should be warmly clothed ; but no cantharides or turpentine should be used, nor any diuretic be given internally. When the groom finds this diSiculty or suppression of staling, he immediately has recourse to a diu- retic ball to force on the urine ; and by thus needlessly irritating a part already too much excited, he adds fael to fire, and frequently destroys the horse. Clysters also of warm soap and water, should be thrown up the rectum every three or four hours ; they will not only promote the early action of the purgative medicine, but will also, to a certain extent, act as a fomentation to the inflamed part. The action of the purgative having begun a httle to cease, carbonate of soda in half-ounce doses should be given two or three times a day. The patient should be warmly clothed, a fresh sheep-skin thrown over the loins and frequently changed, and his legs well bandaged. The food should be carefully examined, and anything that could have excited or that may prolong the irritation carefnUy removed. He should be allowed to drink freely of mucilaginous fluids, such as linseed gi*uel, and be kept on soft food, as bran mash, for some time. DIABETES, OR PROFUSE STALING, Is a comparatively rare disease. It is generally the consequence of un- due irritation of the kidney, by bad food or strong diuretics, and sometimes follows inflammation of that organ. It can seldom be traced in the horse to any disease of the digestive organs. Among the causes of diabetes are improper food, and particularly hay that has been mow-burnt, or oats that are musty. The farmer should look well to this. Oats that have been dried on a kiln acquire a diui-etic property, and if horses are long fed on them, the continual excitement of this organ which they produce will de- generate into diabetes. In the human subject the disease is characterised by the large quantities of urine voided, and the amount of sugar contained in it ; hence the name given to it of diabetes melhtis. In the horse we have the same unusual discharge of urine of a pale colour, but it contains no sugar, bixt a sub- stance analogous to gum ; hence it is termed diabetes incipdus. It frequently affects several horses at the same time, and sometimes assumes a chronic form. It is not an inflammatory disease, and the kidneys will generally be found paler in colour, and softer in texture. The treatment is not always satisfactory, and the results often uncertain. It is evidently increased action of the kidneys, and therefore the most rational plan of treatment is to endeavour to abate that action. In order to effect this, our first care should be to change the diet upon which the animal has been feeding ; and, indeed, the mere substitution of sweet and wholesome provender, for the indigestible, mow-burnt, and musty diet, will materially assist the cure. Very careful attention should be paid to the food. The hay, oats, and split beans, should be of the best quality ; green-meat and carrots will also be serviceable. The animal should be kept short of water, in which may be mingled a small quantity of Hme. Our medicinal agents should consist of either mineral or vegetable tonics. THE BLADDER. 339 The iodide of iron, in 5j to 3ij doses repeated every twelve hours, may bo given for a few days. BLOODY URINE — H5)MATURIA. The discharge of urine of this character is of occasional occurrence. Pure blood is sometimes discharged which immediately coagulates — at other times it is more or less mixed with the urine, and does not coagulate. The cause of its appearance and the source whence it proceeds cannot always be determined, but it is probably the result of some strain or blow. It may or may not be accompanied by inflammation. Should it be the result of strain or violence, or bo evidently attended by inflammation, soothing and depleting measures should be adopted. Perhaps counter-irritation on the loins might be useful. If there is no apparent inflammation, some gentle stimulus may be administered internally. ALBUMINOUS URINE. A peculiar mucous state of the urine of some horses has lately attracted attention. It has been associated with sferetcliing out of the legs, stiffness, disinclination to move, a degree of fever, and costiveness. Slight bleeding, mild physic, the appHcation of gentle stimulants to the loins, quietness, and gentle opiates have been of service. We are indebted to Mr. Percivall for what we do know of the disease. It is a subject worthy of the attention of the veterinary surgeon. THE BLADDER. The urine separated from the blood by the kidneys is discharged by the minute vessels, of which we have spoken, into some larger canals, which ter- minate ia a cavity or reservoir in the body of each kidney, designated its pelvis. Thence it is conveyed by a duct called the ureter, to a larger reservoir, the Madder ; this duct does not dii-ectly perforate the coats of the bladder, but enters obhquely one coat after another, thus forming a perfect obstruc- tion to the return of the urine. The bladder Hes in, and when distended by urine, nearly fills the cavity of the great bones of the haunch, termed the pelvis. It has three coats, the outer one covering the greater part (the anterior portion) of it, and being a continuation of the peritoneum : the muscular, consisting of two layers of fibres, as in the stomach ; the external, running longitudinally, and the inner cu-cularly, so that it may yield to the pressui'e of the urine as it enters, and contract again into an exceedingly small space as it runs out, and by that contraction assist in the expulsion of the urine. The inner coat contains numerous little glands, which secrete a mucous fluid to defend the bladder from the acrimony of the urine. The bladder ter- minates in a small neck, round which is a strong muscle, called the sphincter or closing muscle, keeping the passage closed, and retaining the urine until, at the will of the animal, or when the bladder contains a certain quantity of fluid, the muscular coat begins to conti^act, the dia- phragm is rendered convex towards the intestines, and presses them on the bladder, and by these united powers, the sphincter muscles becoming relapsed, the fluid is forced through the neck of the bladder, and escapes. INPLAMMATION OF THE BLADDER. There are two varieties of this disease, inflammation of the body of the bladder, and of its neck. The symptoms are nearly the same as those of inflammation of the kidney, except that instead of a total suppression of urine, it is voided very frequently and in small quantities, and there is heat felt in the rectum over the situation of the bladder. The caui5es ai'o z2 340 STONE IN THE BLADDER. the presence of some acrid or irritant matter in the urine, or of calculus or stone in the bladder. With reference to inflammation of the body of the bladder, mischief has occasionally been done by the introduction of cantha- rides or some other irritating matter, in order to hasten the period of horsing in the mare. The treatment in this case will be the same as in inflammation of the kidneys, except that it is of more consequence that the animal should drink freely of water or thin gruel. In inflammation of the neck of the bladder there is, on the contrary, a great dread of and disinclination to urinate, and often ending in almost total suppression ; and to such an extent does this proceed, that the case can never be mistaken by him who will pay sufficient attention to the case, for the bladder is distended with urine, and can be distinctly felt under the rectum. It is spasm of the sphincter, closing the neck of the bladder so powerfully, that the contraction of the bladder and the pressure of the muscles are unable to force out the ui'ine. Here the object to be attempted is sufiSciently plain. This spasm must be relaxed, and the most likely means to eSect it is to bleed largely, and fven to fainting. This will sometimes succeed, and there will be at once an end to the disease. To the exhaustion and loss of muscular power occa- sioned by copious bleeding, should be added the nausea consequent on physic. Should not this speedily have effect, another mode of abating spasm must be tried — powdered opium, made into a ball or drink, should be given eveiy two or three hours, and at the same time half an ounce of crude opium should be introduced into the rectum ; while active counter- irritation is applied externally. The evacuation of the bladder, both in the mare and the horse, should be efiected through the medium of a veterinary surgeon. STONE IN THE BLADDER. The urine is a very compound fluid. In the state of health it contains several acids and alkaHes variously combined, which, under disease, are increased both in number and quantity. It is very easy to conceive that some of these may be occasionally separated from the rest, and assume a solid form both in the pelvis of the kidney and in the bladder. This is known to be the case both in the human being and the brute. These calcuH or stones are in the horse offcener found in the kidney than in the bladder, contrary to the experience of the human surgeon. The explana- tion of this, however, is not difficult. In the human being the kidney is situated above the bladder, and these concretions descend from it to the bladder by their weight. The belly of the horse is horizontal, and the force of gi'avity can in no way aflect the passage of the calculus ; therefore it occasionally remains in the pelvis of the kidney, until it has increased so much in size as to All it. We know not of any symptoms that would satis- factorily indicate the presence of a stone in the kidney ; and, if the disease could be ascertained, we are unable to say what remedial measures could be adopted. The composition of calculi found in the bladder diSers from those in the intestines — in the latter the phosphate of Hme is the principal ingredient, in the former they consist of the carbonate of lime and animal matter. The symptoms of stone in the bladder much resemble those of spasmodic coh'c, except that, on careful enquiry, it will be found that there has been much irregulaiity in the discharge of urine and occasional suppression of it. When fits of apparent coUc frequently return, and are accompanied by any pecuharity in the appearance or the discharge of the urine, the horse should be careftilly examined. This generally may be satisfactorily done by introducing the hand into the rectum, and with the other manipu- STONE IN THE BLADDER. 341 lating the groin, when with the aid of an assistant it will readily be felt — should this not prove decisive the horse may be thrown. If there is stone in the bladder, it will, while the horse lies on its back, press on the boAvel, and may be distinctly felt by the hand in the rectum. Several cases have lately occurred of successful extraction of the calculus ; but to effect this it will always be necessary to have recourse to the aid of a veterinary practitioner. Both the practitioner and the amateur will be gratified by the descrip- tion of a catheter, invented by Mr. Taylor, a veterinary surgeon of Notting- ham, which may be introduced into the bladder without difficulty or pain, and the existence and situation of the calculus readily ascertained. It is made of polished round ii'on, three feet long, one and a half inch in circumference, and with eight joints at its farther extremity. The solid part between each joint is one and a quarter inch in length, and on-e and a half in circumference, the moveable part being ten inches, and the solid part two feet two inches. The latter has a slight curve, commencing one foot from the handle, and continuing to the first joint of the moveable part, in order to give it facility in passing the urethra, where it is attached to the parietes of the abdomen. The joints are on the principle of a half joint, so that the moveable part would only act in a straight line, or curve in one direction. The joints are perfectly rounded and smooth when acting either in a straight line or a curve. It is represented both in its straight and curved state in the follo^ving cuts. ■- i-^ ^^~;=r" Many horses occasionally void a considerable quantity of gravel, some- times without inconvenience, and at others with evident spasm or pain ; and in some few cases a small calculus has escaped from the bladder and remained in the urethra. A diuretic might be useful in the first case, as increasing the flow of urine, and possibly washing out the concretions before they become too numerous or bulky, but in the latter the canal must be dilated to allow the stone to pass, or opened for its removal. The urine having passed the neck of the bladder, flows along the urethra, and is discharged. The sheath of the penis is sometimes considerably en- larged. When at the close of acute disease, there are swellings and effusions of fluid under the chest and belly, this part seldom escapes. Diuretics will be beneficial, but in extreme cases slight scarifications may be necessary. The inside of the sheath is often the seat of disease. The mucous matter, naturally secreted there to defend the part from the acrimony of the urine, accumulates and becomes exceedingly offensive, and produces swelling, tenderness, and even excoriation, with considerable discharge. Fomentation with warm water, and the cleansing of the part with soap and water, aided perhaps by the administration of a diuretic ball, will speedily remove every inconvenience. Carters are too often apt to neglect cleanliness in this respect. :m2 the skin and its diseases. CHAPTER XV. THE SKIN AND ITS DISEASES. The skin of tlie horse resembles in construction that of other animals. It consists of two chief parts, viz., the cuticle and mtis, materially diffeiino- in their structure and office. The outer one is the cuticle — the epidermis or scarf-skin^ extending over the whole external part of the animal. It is composed of two parts, the external or scaly, and the internal or cellular. K the epidermis is examined by means of a microscope, the existence of the scales somewhat like those of a fish will be readily detected on its surface. There is always a singular change taking place in this outward covering of the animal, a constant alteration and renewal of every pai-t of it, and the scales which fall off in the shape of dandriff are the cells of which the internal portion of the epidermis is made up, having under- o-one compression, on their being forced upward to the surface of the skin. In the action of a bhster they are raised from the skin beneath, in the form of pellucid bladders, and in some diseases are thrown up in hard, dry, white scales, numerous layers of which are placed one above another. The cellular portion of the epidermis is in contact with the papillated surface of the cutis or true skin, from which it is secreted. The name of rete mu- cosum has been given to this part of the epidermis from its web-like structure and soft mucous consistence. In the cells of which it is made up, the material which gives colour to the animal is secreted. In horses with white hair the rete mucosum is white ; it is brown in those of a brown colour ; black in the black, and ia patches of different colours with those, the hue of whose integument varies. The cuticle does not possess either nerves or blood-vessels ; it is therefore devoid of sensibility, but it fulfils a most important function in furnishing a protection to the parts beneath, which are so often exposed to a morbid sensibility. In every part of the body the cuticle is perforated by innumerable pores, some of which permit the passage of the hair ; thi-ough others the perspirable matter finds a pas- sage ; while from others various unctuous secretions make their escape. The cutis or true skin lies beneath the rete mucosum. Like the cuticle, it consists of two pi-incipal parts, the upper or papillated, and the corium or deeper layer. The papillated layer lies beneath and in contact with the rete mucosum or cellular portion of the epidermis, and is so named from numerous conical prominences or papillae on its surface. It is exceedingly vascular, highly sensitive, and differently an-anged in various parts of the body. The sensitive lamina of the foot is the papillated surface of the dermis arrano-ed in a different manner. Beneath this we have the corium, made up principally of areola mixed with white and yellow fibrous tissue. The corium makes up the chief thickness of the skin, and constitutes the pHant and yielding part of it. It varies in its structure in different animals ; in the better bred one we have a larger development of the yellow elastic tissue and in the coarser breed a large amount of white fibrous tissue. It is the substance which is converted into leather when removed jfrom the body, and binds together the different parts of the frame. In some places it does this literally, and clings so closely to the substance beneath that it scarcely admits of any motion : this is the case about the forehead and the back, while upon the face, the sides and flanks, it hangs in loosened folds. In the parts connected with progression it is folded into various duplicatures, that the action of the animal may admit of the THE SKIN AND ITS DISEASES. 343 least possible obstruction. The cutis is tbiimest, and most elastic, on those parts tbat are least covered with hair, or where the hair is altogether de- ficient, as the lips, the muzzle, and the inside of the flanks. Over a great part of the frame lies a sing-ular muscle peculiar to quad- rupeds, and more extensive and powerful in the thin-skinned and thin- haired animals, than in those with thicker hides. It reaches from the poll over the whole of the carcase, and down to the arm before, and the stifle behind. By its contraction the skin is puckered in every direction ; and if it acts strongly and rapidly, the horse is not only enabled to shake ofl" any insect or fly that may annoy him, but sometimes to displace a great part of his harness, and to render it diSicult for the most expert rider to keep his seat. This muscle also assists the skin in bracing that part of the frame which it covers, and, perhaps, gives additional strength to the muscles beneath. It is called the panniculus camosus, or fleshy panicle or covering. The skin answers the double purpose of protection and strength. Where it is necessary that the parts should be bound and knit together, it adheres so tightly that we can scarcely raise it. It is tight along the muscles of the back and loins, and down the yet more powerful muscles of the quarters ; but in other places it is loosely attached, that it may not interfere with the motions of the animah About the brisket, and within the arms and at the flanks, it hano-s even in folds. Of its strength we have abundant proof, both in the livino- and dead animal. Its fibres are interlaced in a most curious and intricate manner so as, when living, to be scarcely lacerable, and converted into leather after death. It is, while the animal is ahve, one of the most elastic bodies with which we are acquainted. It not only perfectly adapts itself to the slow growth or decrease of the body, and appears equally to fit, whether the horse is in the plumpest condition or reduced to a skeleton ; but when a portion of it is distended to an extraordinary degi-ee, in the most powerful action of the muscles, it quickly again contracts to its usual dimensions. When the horse is in health, and every organ discharges its proper functions, a certain quantity of sebaceous matter is spread over the surface of the skin, and is contained iu ah the pores that penetrate its substance, and the skin becomes pliable, easily raised fi'om the texture beneath, and presenting that peculiar yielding softness and elasticity which experience has proved to be the best proofs of the condition, or, in other words the general health of the animal. Then, too, fi-om the oilxness and softness of the skin, the hair Hes in its natui-al and proper direction, and is smooth and glossy. When the system is deranged, and especially the digestive svstem, and the vessels concerned in the nourishment of the animal feebly act', those of the skin evidently sympathise. This oily secretion is no more thrown out ; the skin loses its pHancy ; it seems to cling to the animal, and we have that peculiar appearance which we call hide-bound. This, however requires attentive consideration. We observe a horse in the summer. We find him with a thin, smooth, glossy coat, and his extremities clean and free almost from a single rouo-h or misplaced hair. We meet him again towards the winter, when the thermometer has fallen almost or quite to the freezing point, and we scarcely recognise him in his thick, rough, coarse, coloiu'less coat, and his legs enveloped in long shaggy hair. The health of the horse is, to a certain degree, deranged. He is dull, languid, easily fatigued. He will break into a sweat with the slightest exertion, and it is almost impossible thoroughly bo dry him. He may perhaps feed as well as usual, although that will not H44 THE SKIN AND ITS DISEASED. generally be the case, but be is not equal to the demands wbicb we art) comjielled to make upon him. This process goes on for an uncertain time, depending on the consti- tution of the animal, until nature has effected a change, and then he once more rallies ; but a great altei'ation has taken place in him — the hair has lost its soft and glossy character, and is become dry and staring. The skin ceases to secrete that pecuhar unctuous matter which kept it soft and flexible, and becomes dry and scaly ; and the exlialents on the surface, having become relaxed, are frequently pouring out a profuse perspiration, .vithout any apparent adequate cause for it. So passes the approach to winter, and the owner complains sadly of the appearance of his steed, and, according to the old custom, gives him plenty of cordial balls, — perhaps too many of them, — on the whole not being unserviceable at this critical period, yet not productive of a great deal of good. At length the animal rallies of himself, and although not so strong and fall of spirits as he ought to be, is hardier and more lively than he was, and able to struggle with the cold of the coming winter. Wliat a desideratum in the management of the horse would be a course of treatment that would render all this unnecessary ! This desideratum has been found — a free escape of perspiration, a moist and softened state af the skin, and evident increase of health and capability of enduring fatigue, and working on shorter supply of food than he could before. This is per- formed by the clipping and singeing systems. Mr. Thomas Turner, who was almost one of the earliest advocates of these systems, states, in the fourteenth vol. of the 'Yeterinarian,' that during the months of October and 'November an inordinate growth of hair is observed over the whole surface of the body, and in many horses as early as the beginning of September, and almost invariably prevails, more or less, in every horse that is not thorough-bred. The debilitating efiects thereby Induced are profuse perspiration on the least possible exertion — depression of the animal spirits, and temporary loss of appetite. The removal of all the superfluous hair by close clipping, instantly proves so powerful a tonic to the animal, that he unhesitatingly aflii-ms it to be inferior to none at present known in our pharmacopoeia. We may not, perhaps, be able satisfactorily to explain the apparently magical eSects of clipping and singeing on the general constitution, and particularly the wind of the horse, or the respiratory functions generally, but there is no doubt of their existence. Aji increased tone is given to the system generally ; and, probably, in some way not yet sufiiciently developed, the increased current of the electric fluid may have much to do with it. ]VIr. Snewing gives an interesting account of the efl'ect of clipping on two horses in his establishment. He had a cob, with a fixed catarrh of several months' standing. It did not interfere with the animal's general healthy but was a source of considerable annoyance. At length the owner deter- mined to sell him ; but first he had him clipped. After a few days his attention was di-awn to the cii'cumstance, that either the horse's cough must have left him, or, from repeatedly hearing it, he had ceased to regard it. He watched the animal, and, truly enough, he found that the cough had entirely disappeared. He rode him though the winter and the follow- ing summer, and there was no return of it. The other instance was in a mare which he had after this one was sold. In the months of August, September, and October, 1841, she was con- tinually the subject of intermittent cough. He had her clipped, and in a few days she ceased to cough, and has net been he^rd to cough from that timo. THE HAIK. — COLOUK. 346- PORES OF THE SKIN. Besides the opeuings already mentioned tlirougli which proceeds the auctuous fluid that supples and softens the skin, there are others more numerous, by means of which a vast quantity of aqueous fluid escapes, and perspiration is carried on. As in the human being, this actually exists in a state of health and quietness, although imperceptible; but when the animal is excited by exercise, or laboui-s under some stages of disease, it becomes visible, and appears in the form of di-ops. This process of perspiration is not, however, so far nnder the control of medicine as in the human being. We are not aware of any drugs that will certainly produce it. "Warm clothing seems occasionally to effect it, but this is more in appearance than reality. The insensible perspiration cannot escape through the mass of clothing, and assumes a visible form. This, perhaps, is the case when sheep-skins are apphed over the back and loins in 'locked jaw.' They produce a good eff'ect, acting as a warm poultice over the part, and so contributing to relax the muscular spasms. There are, however, a few medicines, as antimony and sulphur, that have an evident and very con- siderable eff'ect on the skin. Of the existence of absorbent vessels on the skin, or those which, take up some fluid or substance, and convey it into the circulation, we have satisfactory proof. A horse is even more easily salivated than the human being. Salivation has been produced by rubbing a splint with merciirial ointment, previous to blistering ; and a very few di'achms rubbed on the inside of the thighs will probably produce a greater effect than tho practitioner desires. THE HAIR. The hair is the natural clothing of all our domestic quadrapeds. It ia some protection fi^om violence, and more so from cold ; and it varies with the climate in which they live. It springs from below the- skin. There are found on the cellular and fatty substance immediately in contact with the internal surface of the skin, numerous little bulbs, which penetrate into and pass through the skin, and which arriving at the cuticle the hair protriides from the summit of them. The haii* itself, when examined through a microscope, is seen" to be a Httle tube containing a pulpy matter, which iTins through the whole lengih of it, and by which, probably, the hair is fed and rendered pliant, and the loss of which under disease may add to the hard and unthiifty feeling of the coat of a horse out of condition. Thers is no essential difference in the stmcture of the hair, in different parts, as the mane, the tail, and the body, except that the former is larger, longer, and stronger. The base of the bulb whence the hair proceeds being beneath the tru& skin, it is easy to perceive that the hair will grow again, although tho cuticle may have been destroyed. A good blister, although it may remove the cuticle, and seemingly for a while the hair with it, leaves no lasting trace. Even firing, lightly and skilfully performed, and not penetrating through the skin, leaves not much blemish ; but when, in broken kiiees, the true skin is cut thi'ougli or destroyed, there will always remain a spot devoid of hair. COLOUR. The colotir of the hair admits of every variety, and each colour becomes in turn fashionable. Like that of the skin, it is influenced by, or depends on, the mucous mesh- work under the cuticle. There are comparatively 34G COLO UK. few perfectly white horses now remainmg. The snow-white palfrey, \nth its round carcass and barb head, originally from Spain, or perhaps from Barbary, and rarely exceeding the size of a Galloway, is nearly extinct. They are of good constitution, and pleasant in their paces. The majority of white horses are those that have become so. Light-grey colts begin to grow white before they are five years old, especially if they have not much dark mixtui'e about the joints. Grey horses are of different shades, from the Hghtest silver to a dark iron- grey. The silver-grey reminds the observer of the palfrey, improved by an admixture of Arab blood. He does not often exceed fourteen hands and a half in height, and is round-carcassed — tliin-legged — with obHque pas- terns, calculated for a light carriage, or for a lady's riding — seldom subject to disease — but rot very fleet, or capable of hard work. The ii-on-grey is usually a larger horse ; higher in the withers, deeper and thinner in the carcass, more angular in all his proportions, and in many cases a Kttle too long in the legs. Some of these greys make good hackneys and hunters, and especially the Irish horses ; but they are prin- cipally used for the carriage. They have more endurance than the flatness of their chest would promise ; but their priucipal defect is their feet, which are Kable to contraction, and yet that contraction not so often accompanied by lameness as in many other horses. The dappled grey is generally a handsomer and a better horse. All the angular points of the iron grey are filled up, and with that which not only adds to symmetry, but to use. Whether as a hackney, or, the larger variety, a carriage horse, there are few better, especially since his form has been so materially improved, and so much of his heaviness got rid of, by the fi'ee use of foreign blood. There are not, however, so many dappled greys as there used to be, since the bays have been bred vrith so much care. The dappled grey, if dark at first, generally retains his colour to old age. Some of the greys approach to a nutmeg, or even bay colour. Many of these are handsome, and most of them are hardy. The roans, of every variety of colour and form, are composed of white mixed with bay, or red, or black. In some it seems to be a natural mix- ture of the colours ; in others it appears as if one colour' was powdered or sprinkled over another. They are pretty horses for ladies or light car- riages, and many of them easy in their paces, but they do not usually dis- play much blood, nor are they celebrated for endurance. The strawberry horse is a mixtui^e of sorrel with white ; usually hand- some and pleasant, but more celebrated for these quahties than for strength and endurance. The pied horse is one that has distinct spots or patches of different colours, but generally of white with some other coloui\ When the white is mixed with black it is called ' pie-bald,' with bay the name of ' skew- bald ' is given to it. They are not hked as hackneys, on account of their pecuharity of colour, nor in teams of horses ; but they look well when tolerably matched in a phaeton or Hght can-iage. Their value must depend on their breed. The dun, of the G^Uoway size, and with considerable blood, is often attached to the curricle or the phaeton. The larger variety is a true farmer's or miller's horse, -with no great speed or extraordinary strength, yet a good-tempered, good-feeding, good-constitutioned, useful horse enough. Varieties of the dun, shaded with a darker colour, or dappled, and with some breeding, and not standing too high, are beautiful animals, and much sought after for light carriages. The cream-colour, of Hanoverian extraction, with his white iris and COLOUE. ^*^ little experience how far lie would suit otlier purposes Of the chestnuts there are three varieties— the pale red or the sorrel, Jally ^ithtL white, either on the face or t^e.legs-generd^^^^^^^ made vet some of them bulky enough for the heaviest loads, /^eir colour rgene^ally Tbjectionable, and they are supposed to be somewhat deficient ^ThtTo-ht'^hestnut, with less red and ahttle more bay or brown is con- Bid^redap^^^^^^^^ especially if he has Httle or no _ white about h^tCenhe though pleasant to ride is --^X^rcWhe:^ generally weak m^^^^^^ extinct. The pretent variety, however crossed, is not equal to the old ^^Th^dark chestnut is as diiferent a horse from the hackney-hke chestnut as^an be weU imagined ; round in the carcass ; powerM m the quarters, Tut ratttirtL leg's ; possessed of great -^---.^XitiV^S c+^fi-,finn fhat rarelv knows an ailment, except that the teet aie smau anu tpo^^fto co^Laction: and the horse is occasionally of a hot and un- TfIS wTere are many varieties, and they include the very best of our horses of 'every descriptiL. The bright J^''^7lX%toi:& ^Z beautiful, and especially if his mane and tail .^l'}^^^'2etl^eroi able— the ho-htness of his colour seems to give him some tenaemess oi able— me ii nxnes about him, and black from the TnTesl^d hocks toTefit^r^^^ most desirable of aU. He has generaUy t good institution, and good feet; and, if his confonnation is not faulty, will turn out a valuable horse for ahnost every purpose. The baXo^ lias not always so much show and action, but, generally, mo^-e streno'hTd endurance, Ld usefuhiess. He has greater substance Tan tte Sihter bay, and more depth of leg; and, ^ 1- h^d ^he same de- crvee of breeding, he would be as handsome, and more valuable. _ ^ men ho^vm-, we arrive at the bro.vns, it is necessary to examme the deoree of WdLg. This coto is not so fashionable, and thei-efore these Ee\ hive bet considerably n^^^^^ There are --IJ-^/^-J' ^^ those that are o-ood are valuable ; others, probably, are only a Hall or a '^::tX:^%li therefore comparatively -a- je -M fo^^^^^^^^^ and for hamess-for slow work, and, occasionally, for that whicJi is more "^The black-brown is generally more neglected, so far as its breed is con- ceded and should be more carefally exammed. It is valuable ii reS the goodness of constitution of the brown and bay-brown Of the black, greater care has been taken. The heavy b ack of Lm- ooZ^e and the^dland counties is a noble animal, and ^o^lhej^o^ bPvond nrice if he could be rendered more active. The next in size con Ste tL maiorTty of our waggon-horses, and perhaps our best; and on :'slller\3, aid to the Snprovement of J^^^ ^^^^^.^^^ZuZ been devoted, many of our cavalry are mounted. A few ^^^^^ \^°4^^°^^ bred horses and black hunters are occasionally seen ^^V^^^ ;3373^^^; of horses of this colour has not been studied, except for the pui poses mat We been men^^^^ Their peculiar high ^<^^o.X^l2l:^^ZTe for di-aught, and desirable for the parade, would be unbcaiabit m tne 343 MOULTING. roadster. Black horses have been said to be more subject to vice, disease, and blindness, than those of any other colour. This charge is not true to its fall extent ; but there certainly are a great many worthless black horses in every part of the country, Al'ter aU, there is an old saying, that a good horse cannot be of a bad colour ; and that it is far more necessary to attend to the conformation and points of the animal than to his colour. The foregoing observations, how- ever, although they admit of many exceptions, may be useful in guiding to the judicious purchase of the horse, MOULTING. Twice in the year the hair of the body of the horse is changed. The short fine coat of summer would afford little protection against the winter, and that of the winter would be oppressive to the animal if it appeared during the summer. The hair of the mane and tail remains. The bulbous root of the hair does not die, but the pulpy matter seems to be removed from the root of the hair, which, thus deprived of its nourishment, perishes and drops off, and a new hair springs at its side from the same bulb. The hair which is produced in the autumn, is evidently different from that which grows in the spring ; it is coarser, thicker, and not so glossy as the other. As moulting is a process extending over the whole of the skin, and requiring a very considerable expenditure of vital power, the health of the animal is generally affected at these times. That energy and nervous and vital influence, which should support the whole of the f"ame, is to a great degree determined to the skin, and the animal is languid, and un- equal to much hard work. He perspires greatly with the least unusual exertion, and if he is pressed beyond his strength becomes seriously ill. The treatment which the groom in this case adopts is most absurd and dangerous. The horse, from the deranged distribution of vital power, is disposed to fever, or he labours under a slight degree of fever, sufiiciently indicated by the increased quickness of pulse, redness of nose, and heat of mouth. The lassitude and want of appetite which are the accompani- ments of this febrile state, are mistaken for debility ; and cordials of various kinds, some of them exceedingly stimulating, are unsparingly ad- ministered. At length, with regard to the hunter, the racer, and even in the hackney and the carriage horse, the scissors or the lamp are intro- duced, and a new method is established of guarding against this periodical debility, setting at defiance the occasional exposure to cold, and establish- ing a degree of health and streng-th previously unknown. Friction may be allowed, to assist the falling off of the old hair, and to loosen the cuticle for the appearance of the new hair, but it is somewhat more gently applied than it used to be. The currycomb is in a great measure banished, and even the brush is not appHed too hard or too long. The old hair is not forced off before the young hair is ready to take its place, Nature adapts the coat to the climate and to the season. The Sheltie has one as long and thick as that of a bear ; and, as the summer is short and cold in those northern islands, the coat is rough and shaggy during the whole of the year. In the southern parts of our country the short and light and glossy coat of summer gradually yields to the close and heavy, and warm clothing of winter. In the deserts of Arabia, where the winter is rarely cold, the coat remains short and glossy throughout the year. These are wise and kind provisions of nature, and excite otur admiration. HIDE-BOUND. 349 HIDE-BOUND. This is not so much a diminution of the cellahir or fatty substance between the skin and the muscles beneath, as it is an alteration in the skin itseh^ It is a hardness and unyieldingness of the skin, from the want of the oily matter on its surface and in its substance. It is the difference that is presented to the feeling by well-cui-ried and supple leather, and that which has become dry and unyielding. The sui'face of the skin becoming dry and hard, the scales of the cuticle are no longer penetrated by the haii-, but, separating themselves in eveiy direction, give that peculiar roughness to the coat which accompanies want of condition. It betokens impaired function of the vessels every- where, and particularly those of the stomach and bowels. Hide-bound is not so much a disease as a symptom of disease, and particularly of the digestive organs ; and our remedies must be applied not so much to the skin — although we have, in friction and in warmth, most valuable agents in producing a healthy condition of the integuments — as to the cause of the hide-bound, and the state of the constitution generally. Every disease that can affect the general system may produce this derangement of the functions of the skin. Glanders, when become constitutional, is strongly indicated by the unthi'ifty appearance of the coat. Chronic cough, grease, farcy, and founder, are accompanied by hide-bound ; and diet too sparing, .and not adequate to the work exacted, is an unfaihng source of it. If the cause is removed, the effect vnll cease. Should the cause be obscure, as it frequently is — should the horse wear an unthi'ifty coat, and his hide cling to his ribs, without any apparent disease, we shall generally be warranted in tracing it to sympathy with the actual, although not demonstrable, suspension of some important secretion of function, either of the aUmentary canal or the respiratory functions. A few mashes, and a mild dose of physic, are first indicated, and, simple as they appear to be, they often have a very beneficial effect. The regular action of the bowels being re-established, that of all the organs of the frame will speedily follow. If the horse cannot be spared for physic, alteratives may be administered. There is no better alterative for hide-bound and an unthrifty coat, than that which is in common use, Jevigated antimony, nitre, and sulphur. The pecuHar effect of the antimony and sulphur, and electric influence on the skin, with that of the sulphur on the bowels, and of the nitre on the urinary organs, will be here advantageously combined. Should the horse not feed well, and there is no indication of fever, a slight tonic may be added, as gentian, or ginger ; but in the majority of cases attended by loss of condition, and an unthrifty coat, and hide-bound, tonics and aromatics should be carefully avoided. The cause of the impaii-ed action of the vessels being removed, the powers of nature "vvill generally be sufficient, and had better be left to themselves. Friction may be employed with advantage in the removal of hide-bound. It has repeatedly been shown that this is one of the most efS.cacious instru- ments we can use to call into exercise the suspended energies either of the absorbent or secreting vessels. Warmth may likewise be had recourse to — not warmth of stable, which has been shown to be so injurious, but warmth arising from exercise, and the salutary, although inexplicable, influence of clipping and singeing. 350 SURFEIT. MAXGE. SUSFEIT. Large pimples or eruptions often appear suddenly on the skin of tlie horse, and especially in the spring of the year. Occasionally they disap- pear as quickly as they came. Sometimes they seem to be attended with great itching, but at other times the annoyance is comparatively Httle. When these eruptions have remained a few days, the cuticle frequently peels off, and a small scaly spot — rarely a sore — is left. This is called a surfeit, from its resemblance to some eruptions on the skin of the human being when indigestible or unwholesome food has been taken. The surfeit is, in some cases, confined to the neck ; but It oftener spreads over the sides, back, loins, and quarters. The cause is enveloped in some obscurity. The disease most frequently appears when the skin is irritable during or after the process of moulting, or when it sympathises with any disorder of the stomach. It has been knovsn to follow the eating of poisonous herbs or mow- burnt hay, but, much oftener, it is to be traced to exposm*e to cold when the skin was previously irritable, and the horse heated by exercise. It has also been attributed to the immoderate drinking of cold water when the animal was hot. It is obstruction of some of the pores of the skin and swelling of the surrounding substance, either from primary affection of the skin, or a plethoric state of the system, or sympathy with the digestive organs. The state of the patient will sufiiciently guide the surgeon as to the course he should pursue. If there is simple eruption, without any marked inflammatory action, alteratives should be resorted to, and particularly those recommended for hide-bound in page 349. They should be given on several successive nights. The night is better than the morning, be- cause the warmth of the stable will cause the antimony and sulphur to act more powerfully on the skin. The horse should be warmly clothed — half an hour's walking exercise should be given, an additional rug being thrown over him — such green meat as can be procured should be used in moderate quantities, and the chill should be taken from the water. Should the eruption continue or assume a more virulent character, bleeding and aloetic physic must be had recourse to, but neither should be carried to any extreme. The phy.^ic having set, the alteratives should again be had recourse to, and attention should be paid to the comfort and diet of the horse. If the eruption, after several of these alternate appearances and disap- pearances, should remain, and the cuticle and the hair begin extensively to peel off, a worse affection is to be feared, for surfeit is too apt to precede, or degenerate iuto, mange. This disorder, therefore, must next be con- sidered. MANGE. This disease affects most of our domesticated animals, in different forms, and in the haman subject a similar disease is known by the name of itch. In an animal affected with mange, the cuticle and the hair fall off, and there is, as in obstinate surfeit, a bare spot covered with scurf — some fluid oozing from the skin beneath, and this changing to a scab, which likewise soon peels off, and leaves a wider spot. This process is attended by con- siderable itching and tenderness, and thickening of the skin, which soon becomes more or less folded, or puckered. The mange generally first ap- pears on the neck at the root of the mane, and its existence may be suspected even before the blotches appear, and when there is only con- siderable itchiness of the part, by the ease with which the short hxiil" at the root of the mane is plucked out. From the neck it spreads upward MANGE. ial to the head, or downward to the withers and back, and occasionally extends over the whole carcass of the horse. One cause of it, although an unfi-equent one, has been stated to be neglected or inveterate sui-feit. Several instances are on record in which poverty of condition, and general neglect of cleanKness, preceded or pro- duced the most violent mange. A remark of Mr. Blane is very important : — ' Among the truly healthy, so far as my experience goes, it never arises spontaneously, but it does readily from a spontaneous origin among the unhealthy.' The most common cause is contagion. Amidst the whole hst of diseases to which the horse is exposed, there is not one more highly contagious than mange. K it once gets into a stable, it spreads through it, for the slightest contact seems to be sufficient for the communication of this noisome complaint. If the same brush or currycomb is used on all the horses, the propaga- tion of mange is assui'ed ; and horses feeding in the same pasture with a mangy one rarely escape, from the propensity they have to nibble one another. Mange in cattle has been propagated to the horse, and from the horse to cattle. There are also some well-authenticated instances of the same disease being communicated from the dog to the horse, but not from the horse to the dog. Mange has been said to originate in want of cleanliness in the manage- ment of the stable. The comfort and the health of the horse demand the strictest cleanliness. The eyes and the lungs frequently suffer from the noxious fumes of the putrefying dung and urine ; but, in defiance of common prejudice, there is no authentic instance of mange being the result. It may, however, proceed from poverty. When the animal is half starved, and the functions of digestion and the power of the consti- tution are weakened, the skin soon sympathises, and mange is occasionally produced, instead of surfeit and hide-bound. Every farmer has proof enouo:h of this beino; the case. If a horse is turned on a common where there is scarcely sufficient herbage to satisfy his appetite, or if he is placed in one of those straw-yards that are under the management of mercenary and unfeeling men, and are the very abodes of misery, the animal comes up a skeleton, and he comes up mangy too. Poverty and starvation are fiTutfal sources of mange, but it does not appear that fi^lth has much to do with it, although poverty and filth generally go hand in hand. The actual cause of mange, however, is the existence of a parasite burrowing in the skin, the knowledge of which is comparatively of recent date in this country, although it has been for some time known on the Continent ; the name of the insect is the Acams equi, and is precisely analogous to the parasite producing the itch in man — it belongs to the family of mites, one of the most widely disseminated famihes in the animal creation ; they are found in the most delicate preparations in our museums ; in all kinds of preserved animal and vegetable substances ; in our very food — in the skin of man, producing the itch, in the skin of the horse and the dog, producing the mange. It is to the valuable aid of the microscope we are indebted for the discovery of this most miscluevous and troublesome insect — a regular set of scourgers, burrowing under the epidermis, or scarf-skin in man, and in the horse, sucking up and thus clearing away the impurities on the skin, which filth and dirt accumulate, and in return depositing their eggs, rearing tbeir progeny, and giving unmistakeable evidence of their existence. The acarus has eight legs, most of which terminate in a cup-Uke form, which acting like a sucker, enables the mite to adhere to the skin in a most pertinacious manner. It is to a paper by Mr. Erasmus Wilson, read in connection with the 8,12 M.\NaE. Veterinary Medical Association, we are indebted for these and many other most interesting particulars. Tlie propriety of bleeding in cases of mange depends on the condition of the patient. If mange is the result of poverty, and the animal is much debihtated, bleeding will increase the evil, and will probably deprive the constitution of the power of rallying. Physic, however, is indispensable in every case. It is the first step in the progress towards cure. In this, however, mange in the horse resembles itch in the human being — medi- cine alone T\ill never effect a cure. There must be some local appUcation. There is this additional similarity — that which is most efiectual in curing the itch in the human being must form the basis of every local application for the cure of the mange in the horse. Sulphur is iadispensable in every unguent for mange. It is the sheet-anchor of the veterinary surgeon. In an early and not very acute state of mange, equal portions of sulphur, turpentine, and train-oil, gently but well rubbed on the part, will be ap- plied with advantage. Farriers are fond of the black sulphur, but that which consists of earthy matter, vtdth the mere dregs of various sub- stances, cannot be so effectual as the pui'e sublimed sulphur. A tolerably stout brush, or even a currycomb, lightly applied, should be used, in order to remove the dandiiflF or scurf, wherever there is any appearance of mange. After that, the horse should be washed with strong soap and water as far as the disease has extended ; and, when he has been thoroughly dried, the ointment should be well rubbed in with the naked hand, or with a piece of flannel. More good will be done by a Httle of the oint- ment being well rubbed in, than by a great deal being merely smeared over the part. The rubbing should be daily repeated. The sulphur seems to have a direct influence on the disease — the tur- pentine has an indii-ect one, by exciting some irritation on the skin of a difl'erent nature from that produced by the mange, and under the influence of which the irritation of mange will be diminished, and the disease more easily combated. Duii ng the application of the ointment, and as soon as the physic has set. an alterative ball or powder, similar to those recom- mended for the other affections of the skin, should be daily given. If, after some days have passed, no progress should appear to have been made, half a pound of sulphur should be well mixed with a pint of oil of tar, and the affected parts rubbed, as before. On every fifth or sixth day the ointment should be washed off with warm soap and water. The pro- gress towards cure will thus be ascertained, and the skin vrill be cleansed, and its pores opened for the more effectual apphcation of the ointment. The horse should be well suppHed with nourishing, but not stimulating food. As much gi'een meat as he will eat should be given to him, or, what is far better, he should be turned out, if the weather is not too cold. It is necessary, however, to be assured that every mangy place has been anointed. It will be pmdent to give two or three dressings after the horse has been apparently cured, and to continue the alteratives for ten days or a fortnight. The cure being completed, the clothing of the horse should be well soaked in water, to which a fortieth part of the saturated solution of the chloride of Hme has been added ; after which it should be washed with soap and water, and again washed and soaked in a solution of the chloride of lime. Every part of the harness should imdergo a similar purification. The cuiTycomb may be scoui-ed, but the brush should be burned. The rack, and manger, and partitions, and every part of the stable which the I orse could possibly have touched, should be well washed vr^th a hair-broom — a pint of the chloride of lime being added to three gallons of water. All the wood-work should then be scoured with soap RINGWORM. 3/53 and "water, after ■wbicli a second washing with the chloride of lime will render all secure. Some formers have pulled down their stables, when they have been thoroughly infected with mange. This is being unneces- sarily cautious. The efficacy of the chloride of lime was not then known ; but if that is carefully and sufficiently applied to every part of the stable and its furniture, there cannot afterwards be dano;er. -n . . . Every case of itchiness of the skin should be regarded with suspicion. Wben a horse is seen to rub the root of his tail, or his head, or neck, against the manger, the parts should be carefully examined. Some of the hair may have been rubbed or torn off, but if the roots remain firmly adherent, and there is only redness and not scurfiness of the skin, it pro- bably is not mange but only inflammation of the skin, from too great fulness of the blood. A little blood should be abstracted — a purgative administered — and the alteratives given. The mange ointment cannot do harm, and may possibly prevent this heat of the skin from degenerating into mange, or arrest the prog-ress of mange if it has commenced. If a Bcurfiness of skin should appear on any of the points that are pressed upon by the collar or harness, the veterinary surgeon will do right to guard against danger by alterative medicine and the use of the ointment. EINGWORM. This is a highly contagious disease, and affects in a greater or less ae- gree most of our domestic animals. Young animals are most susceptible of it, but it is sometimes met with in old ones, and is frequently connected with a debilitated condition of the system, either the result of disease or poverty. The name ringworm would indicate that this disease was pro duced by some animal, but although such is not the case, there is no doubt it is the result of a parasitic vegetable fungus composed of minute oval spores and short curved filaments, which pervades and splits up the roots of the hairs. The disease affects the skin in circular patches vary- ing in size, frequently as large as half a crown. The skin is first raised, and, in a few days, the hair comes off, leaving a bald round space the surface of which is dry and scaly. They are found in almost all parts of the body, but more especially about the neck and quarters, and if neglected will increase rapidly and prove a very troublesome disease. The treat- ment should at once consist in removing the animal to a place where there would be no Liability to his being brought in contact with other animals, great care being obseiwed by the attendant in keeping everything con- nected with his treatment, away from any other horse. Ringworm is so contagious in its nature that it may be propagated in a variety of ways, and sometimes baffies our most careful efforts to prevent its extension ; therefore too great caution cannot be observed on the part of those under whose care the animal is placed. Great numbers of remedial agents have been employed in the cure of ringworm, but none will be found simpler or better than the biniodide of raercury made into an ointment in the proportion of half a drachm of the biniodide to one ounce of lard, a small quantity being well rubbed on the whole surface of the ringworm every third day. By this means the parasitic fungus will be destroyed, and a gentle stimulating eS'ect produced upon the skin, which will hasten the growth of the hair. Attention should also be paid to the general health of the animal ; if suffering from debility, a more generous diet will be found the best tonic, and materially hasten the cure. If, as is some- times tlie case, the animal affected be in good condition, a dose of physic followed by alteratives may be necessary, A A 354 GREASE. GREASE, Grease is a specific inflammation of the sebaceous follicles of the skin of the heels, sometimes of the fore feet, but oftener of the hind ones, followed by an increased morbid secretion. There is a peculiarity about the skin of the heel of the horse. In its healthy state there is a secretion of greasy matter from it, in order to prevent excoriation and chapping, and the skin is soft and pUable, Too often, however, from bad management, the secretion of this greasy matter is stopped or altered, and the skin of the heel becomes red, and dry, and scurfy. The joint still continuing to be extended and flexed, cracks of the skin begin to appear, and these, if neglected, rapidly extend, and the heel becomes a mass of soreness and ulceration. The distance of the heel from the centre of circulation, and the position of the hind limbs, render the return of blood slow and difiicult. There is also more variation of temperature here than in any other part of tho frame. As the horse stands in the closed stable, the heat of this part is too often increased by its being imbedded in straw. When the stable door is open the heels are nearest to it, and receive first, and most powerfully, the cold current of air. When he is taken from his stable to work, the heels are frequently covered with mire and wet, and they are oftenest and most intensely chilled by the long and slow process of evaporation which is taking place from them. No one, then, can wonder at the frequency with which the heels, especially the hind ones, are attacked by inflamma- tion, and the difficulty there is in subduing it. Some horses are more subject to grease than others, especially draught horses, both heavy and light, but particularly the former, and if they have no degree of breed in them. It was the experience of this which partly contributed to the gradual change of coach and other draught horses to those of a lighter breed. In the great majority of cases, grease arises from mismanagement and neglect. Everything that has a tendency to excite inflammation in the skin of the heel is a cause of grease. Therefore want of exercise is a frequent source of this disease. The fluid which accumulates about the extremities, and is unable to i^turn, is a source of irritation by its continued pressure. VYhen high feeding is added to irregular or deficient exercise, the disease is eWdently still more Ukely to be produced. Want of cleanliness in the stable is a fruitful source of grease. When the heels are imbedded in filth, they are weakened by the constant moistui-e surrounding them — irritated by the acrimony of the dung and the urine, and little prepared to endure the cold evaporation to which they are exposed when the horse is taken out of the stable. The absurd practice of washing the feet and legs of horses when they come from their work, and either carelessly sponging them down afterwards, or leaving them to dry as they may, is, however, the most common origin of grease. When the horse is warmed by his work, and the heels share in the warmth, the momentary cold of washing may not be injurious, if the animal is immediately rubbed dry; yet even this would be better avoided : but to wash out the heels, and then leave them partially dry or perfectly wet, and suffering from the extreme cold that is produced by evaporation from a moist and Avet surface, is the most absurd, dangerous, and injurious practice that can be imagined. It is worse Avhen the post-horse or the plough-horse is plunged up to his belly in the river or pond, imme- diately after his work. The owner is little aware how many cases of inflammation of the lungs, and bowels, and feet and heels follow. It GREASE. 555 would, therefore, be an excellent rule never to wash the heels of these horses. After they have been suifered to stand for twenty minutes in the stable, during which time the horse-keeper or the carter may be employed in taking care of the harness, or carriage, or beginning to dress the horse. the greater part of the dirt which had collected about the heels may be got rid of Avith a dry brush ; and the rest will disappear in a quarter of an hour afterwards under the operation of a second brushing. The trouble "will not be great, and the heels will not be chilled and subject to inflam- mation. Much error has pi'evailed, and it has led to considerable bad practice, from the notion of hiimours flying about the horse, and which, it is said, must have vent somewhere, and attack the heels as the weakest part of the frame. Thence arise the physicking, and the long course of diuretics, which truhj weaken the animal, and often do irreparable mischief. Grease is a local complaint. It is produced principally by causes that act locally, and it is most successfully treated by local applications. Diu- retics and purgatives may be useful in abating inflammation ; but the grand object is to get rid of the inflammatory action which exists in the skin of the heel, and to heal the wounds, and remedy the mischief which it has occasioned. The skin soon cracks, and is followed by the exudation of a greasy and very foetid fluid. As the disease progresses it involves the skin at the back part of the leg, especially where there is long hair, and sometimes extends nearly to the hock, but rai-ely above it. ^VTien cracks appear, the mode of treatment "will depend on their extent and depth. If they are but slight, a lotion, composed of sulphate of zinc or alum ointment, will often speedily dry them up, and close them. If the cracks are deep, wdth an ichorous discharge and considerable lameness, it will be necessary to poultice the heel. A poultice of linseed meal and bran will be generally efi^ective, unless the discharge is thin and ofiiensive, when an ounce of finely powdered charcoal should be mixed with the linseed meal ; or a poultice of carrots, boiled soft and mashed* The efficacy of a carrot poultice is seldom sufficiently appreciated in eases like this. When the inflammation and pain have evidently subsided, and the sores discharge good matter, the calamine ointment may be appUed with advan- tage ; and the cui'e will generally be quickened if a diluted solution of sulphate of zinc or alum is applied. An application that will be found nearly a specific, after the poulticing and physicking have been had recourse to, is a mixture of from two di-achms to half an ounce of sulphuric acid to a pint and a half of water, making a quart mixture. A little of this appHed morning and evening, also as soon as the legs have been dressed after work, will be found highly beneficial. After the chaps or cracks have healed, the legs will sometimes continue gorged and swelled. A flannel bandage, evenly applied over the whole of the swelled part, will be very serviceable ; or, should the season admit of it, a run at grass, particularly spring grass, should l)e allowed. In some cases the cracks are not confined to the centre of the heels, but spread over them, and extend on the fetlock, and even up the leg, while the legs are exceedingly swelled, and there is a wateiy discharge from the cracks, and an apparent oozing through the skin at other places. The legs are exceedingly tender and sometimes hot, and there is an appearance which the farrier thinks very decisive as to the state of the disease, and which the better-informed man should not overlook — the heels smoke — the Bkin is so hot that the watery fluid partly evaporates as it runs from the cracks or oozes through the skin. A A 2 556 GREASE. Tliere will be a great danger, it ia said, in suddenly stopping this dis- cliarge. Inflammation of a more important part, it is apprehended, may rapidly succeed to the injudicious attempt. The local application should be directed to the abatement of the inflammation. The poultices just referred to should be diUgently used night and day, and especially the carrot-poultice ; and when the heat, and tenderness, and stiffness of motion have diminished, astringent lotions may be applied — either the alum lotion or a strong decoction of oak-bark, changed, or used alternately, but rot mixed. The cracks should likewise be dressed with the ointment above mentioned ; and, the moment the horse can bear it, a flannel bandage should be put on, reaching from the coronet to three or fonr inches above the swelling. The medicine should be confined to mild diuretics, or, if the horse is gross, and the inflammation runs high, a dose of physio may be given. If the horse is strong, and fall of flesh, physic should always precede and sometimes supersede the diuretics. In cases of much debility, diu- retics, with aromatics or tonics, will be preferable. The feeding should Likewise vary with the case, but with these roles, which admit of no exception, that green meat should be given, and more especially carrots, when they are not too expensive, and mashes, if the horse will eat them, and never the full allowance of corn. Walking exercise should be resorted to as soon as the horse is able to bear it, and this by degi-ees may be increased, but in no stage of the disease neglected. From bad stable management at first, and neglect during the disease, a yet worse kind of grease occasionally appears. The ulceration extends over the skin of the heel and the fetlock, and fungoid growths spring from the sui'face of both, highly sensitive, bleeding at the sHghtest touch, and interspersed with scabs. By degrees, portions of the fungoid growths be- gin to be covered with a horny substance protruding in the form of knobs, and collected together in bunches. These are known by the name of grapes, and consist of an altered state of the papillated surface of the der- mis. A foetid and veiy peculiar exudation proceeds from nearly the whole of the unnatm-al substance. The horse evidently suff'ers much as he is Gradually worn down by the discharge. The assistance of a veterinary surgeon is here ixidispensable. There has been some dispute as to the propriety of cutting the hair from the heels. Professor Stewart has the follo\\ang observations : — ' During two very wet winters, I have had opportunity of observing the results of trimming and no trimming, among upwards of 500 horses. More than 300 of these have been employed in coaching and posting, or work of a similar kind, and about 150 are cart-horses. Grease, and other skin diseases of the heels have been of most frequent occurrence where the horses are both trimmed and washed ; they have been common where the horses were trimmed but not washed, and there have been very few cases where washing or trimming were forbidden or neglected.' Custom has very properly retained the hair on our farm-horses. Nature would not have given it had it not been useful. It guards the heel from being in- jured by the inequalities of the ploughed field ; it prevents the dirt, in which the heels are constantly enveloped, from reaching and caking on, and irritatino- the skin ; it hinders the usual moisture which is mixed with the clay and mould from reaching the skin, and it preserves an equal temperature in the parts. If the hair is stifiered to remain on the heels of the farm-horses, there is greater necessity for brushing and hand- rubbing the heels, and never washing them. Fashion and utility have removed the hair from the heels of our hack- WARTS. — VEKMiy. 857 ney and carriage horses. When the horse is carefully tended after his work is over, and his legs quickly and completely dried, the less hair he nas about them the better, for then both the skin and the hair can be made perfectly dry before evaporatioH begins, or proceeds so far as to deprive the legs of their heat. Grease is the child of neghgence and mismanage- ment. It is driven from our cavalry, and it will be the fault of the gentleman and the farmer if it is not speedily banished from every stable. WARTS. These are tumours of variable size, arising from the cuticle, and pro- duced by an altered (hypertrophied) state of the papillated structure of the dermis. There are several varieties in different parts of the body. The scaly wart which frequently acquires considerable size, and the sur- face of which is generally covered with moisture, is found usually on the abdomen. The round one on the eyehds and face, and the pointed one on the teats. Another kind called the encysted wart sometimes exists in large numbers on the inside of the thigh and prepuce. There is no alter- ation in the external appearance of the skin, but a hard moveable tumour is felt depending upon the obliteration of some of the sebaceous follicles, by an increase of the contents of the whole gland. The walls of the cyst are composed of condensed areolar tissue. Warts must be removed by an operation If the root be very small it may be snipped asunder with a pair of scissors close to the skin, and the root touched with the lunar caustic. If the pedicle or stem be somewhat larger, a hgature of waxed silk may be passed firmly round it, and tightened every day. The soui-co of nutriment being thus cut off, the tumour will, in a few days, die and drop off. If they are large or in considerable clusters, it will be necessary to cast the horse, to cut them off close to the skin, and sear the root with a red-hot iron. Unless these precautions are used, the warts wall speedily sprout again. In encysted warts an opening should be freely made over the centre, and the contents squeezed out. MALLENDERS AND SALLENDERS. On the inside of the hock, or a little below it, as well as at the bend ot the knee, there is occasionally a scurfy eruption called mallenders in the fore-leg, and sallenders in the hind-leg. They seldom produce lame- ness ; but if no means are taken to get rid of them, a discharge proceeds from them which it is afterwards difficult to stop. They usually indicate bad slable management. A diuretic ball should be occasionally given, and an ointment composed of carbonate of zinc and lard rubbed over the part. Should this fail, a weak mercurial ointment may be used, VERMIN. Both the biped and quadruped are subject to the visitation of insects that fasten on the skin, and are a constant nuisance from the itching which they occasion. If the horse, after being turned out for the winter, is taken up again in the spring, long and rough in his coat and_ poor in condition, and with evident hide-bound, he will almost invariably be afflicted with vermin. In our present acquaintance with natural history, it is difficult to account for the appearance of certain insects, and of those alone on the integument of one animal, while others, of an altogether different character, are found on its neighbour. Each one has a tormentor peculiar to itself. The vermin o^ the horse can be desti'oyed by an 868 THE FOEE-LEGS. infasioii of tobacco, or, -wliat is equally effectual, a decoction of stavesacre seeds. The skin being once cleansed of tbem, attention to the condition of the animal, and cleanliness •will prevent their re-appearance. CHAPTER XVI THE FORE-LEGS. We arrive Tiovr at those parts of the frame which are most essentially connected vnih the action and value of the horse, and oftenest and most annoyingly the subjects of disease. The extremities contain the "whole apparatus of voluntary motion, -with -which the action, and speed, and .strength of the horse are most concerned. The fore-legs, when viewed in front, should be widest at the chest, and should gradually approach to each other as we descend towards the fetlock. The degree of width must depend on the purpose for which the horse is wanted. The legs of a heavy draught-horse can scarcely be too far apart. His rounded chest enables him to throw more weight into the collar ; and not being required for speed, he wants not that occasionally increased ex- pansion of chest which the circular form is not calculated to g-ive. A hunter, a hackney, and a coach-horse should have sufficient expansion of the chest, or the legs sufficiently "wide apart, to leave room for the play of the lungs ; but depth more than roundness of chest is here required, because the deep chest admits of most expansion when the horse, in rapid action, and the circulation proportionally quickened, needs most room to breathe ; yet, if the breast is too wide, there will be considerable weight thrown before, and the horse will be heavy in hand and unsafe. ^VTiether the legs are near to each other or wide apart, they should be straight. The elbow should not have the slightest inclination inAvard or outward. K it inclines toward the ribs, its action will be confined, and the leg will be thrown outward ivhen in motion, and describe a curious and awkward curve. This will give a peculiar rolHng motion, unpleasant to the rider and unsafe to the animal. The toe will like-wise be turned outward, which will not only prevent the foot from coming flat on the ground in its descent, but be usually accompanied by cutting, even more certainly than when the toe turns inward. If the elbow is turned outward the toes will necessarily be turned inward, which is a great unsightliness, and to a considerable degree injurious, for the weight cannot be perfectly distributed over the foot — the bearing cannot be tme. There -n-ill also be undue pressure on the inner quarter, a tendency to unsafeuess, and a dis- position to splint and com. The legs should come down perpendicularly from the elbow. If they incline backward and under the horse, there is undue stress on the extensor muscles ; and, the legs being brought nearer the centre of gravity, too great weight is thrown forward, and the horse is liable to knuckle over and become unsafe. Another very unsightly defect is that called calf-legged, when the knee, in- stead of being straight under the ai-m, curves backwards — it is an unsafe and useless variation of form. If the legs have a direction forward, the flexor muscles are strained, and the action of the horse is awkward and confined. The toe should be found precisely under the point of the shoulder. If it is a little more forward, the horse will probably be deficient in action; if it is more under the horse, unsafeness will be added to still greater defect in going. THE SHOULDER. 359 "We commence -svitli tlie upper portion, of wliicli the fore extremity, the shoulder, is seen at G, jjage 140. THE SHOULDEE. The scap^da or shoulder-blade, situated forward on the side of the chest, ■is a bone of a somewhat triangular shape, with its apex or narrowest point downward, and its broad and thin expansion upward. The point of the shoulder hes opposite to the first and second ribs ; the hinder expansion of the base reaches as far back as the seventh rib ; it therefore extends obhquely along the chest. It is divided, externally, into two unequal portions by a ridge or spine running through almost the whole of its extent, and desig-ned, as will be presently seen, for the attachment of important muscles. The broad or upper part, having no muscles of any consequence attached to it, is terminated by cartilage. The shoulder-blade is united to the chest by muscle alone. There is one large muscle, with very remarkable tendinous fibres and of immense strength (the serratus magnus, great saw-shaped muscle), attached to the chest, all the true ribs, and to the upper third of the internal surface of the shoulder-blade, and the four last cervical vertebras, and by which, assisted, or rather strengthened, by the other muscles, the weight of the body is supported, and the shock of the voidest leap, or the most rapid motion, sustained. Had there been a bony union between the shoulder and the body, the vital parts contained in the chest could not have endured the dreadful shock which they would occasionally have experienced ; nor could any bone have long remained whole if exposed to such violence. The muscles within the shoulder-blade act as powerful and safe springs. They yield, as far as necessary, to the force impressed upon them. By their gradual yielding they destroy the violence of the shock, and then by their elastic power, immediately gaixi their former situation, SLANTING DIKECTION OF THE SHOULDER. The lessening or breaking of the shock, from the weight being thro^vn violently on the fore legs, is effected in another way. It will be observed, that (see G and J, p. 140) the shoulder-blade and the lower bone of the shoulder are not connected together in a sti'aight line, but form a vei'y considerable angle with each other. This wall be more evident from the following cut, which represents the fore and hind extremities in the situa- tions which they occupy in the horse. This angular construction of the limbs reminds us of a similar arrange- ment of the springs of a carriage, and the ease of motion, and almost per- fect freedom from jolting, which are thei'eby obtained. It must not perhaps be said, that the form of the spring was borrowed from this construction of the limbs of the horse, but the effect of the carriage- spring beautifully illustrates the connection of the different bones in the extremities of this quadruped. The obliquity or slanting direction of the shoulder effects other very useful purposes. That the stride in the gallop, or the space passed over in the trot, may be extensive, it is necessary that the fore part of the animal should be considei'ably elevated. The shoulder, by means of the muscles which extend from it to the inferior part of the limb, is the grand agent in effecting this. Had the bones of the shoulder been placed more upright than we see them, they could not then have been of the length which they now are — their connection Avith the chest could not have been so secure — and their movements upon each other would have been 360 SLANTING DIRECTION OF THE SHOULDER. comparatively restricted. The slightest inspection of this cut, or of that at page 140, mil show that, just in proportion as the point of the shoulder is brought forward and elevated, will be the forward action and elevation of the limb, or the space passed over at every effort. The slanting shoulder accomplishes a most useful object. The muscles extending over the shoulder-blade to the lower bone of the shoulder are the power by which motion is given to the whole of the limb. The extent and energy of that motion depend much on the force exerted or the strength of the muscle, but there are circumstances in the relative situations of the diffei'ent bones which have far greater influence. Let it be supposed that, by means of a lever, some one is endeavouring to raise a certain weight. A is a lever, resting or turning on the pivot B ; C is the weight to be raised; and D is the power, or the situation at which the poAver is applied. If the strength is applied in a direction perpendicular to the lever, as j-e- presented by the line, E, the power which must be exerted can easily be calculated. In proportion as the distance of the power from the pivot or centre of motion exceeds that of the weight from the same place, so will be the ad- cSLAXTING DIRECTION OF THE SHOULDER. 361 vantage gained. The power here is twice as far from the centre as the weight is, and therefore advantage is gained in the proportion of two to one° or if the weight is equal to 200 lbs., a force of 100 lbs. will balance it. K the direction in which the power is applied is altered, and it is in that of the line F, Avill 100 lbs. effect the purpose ? No ; nothing like it. How then, is the necessary power to be calculated ? The calculation of the force which must be exerted in a direction intermediate between the direction of the line E and of the lever A B, involves questions of geometry somewhat foreign to the object of these pages. But though the exact estimation of the exact power to be exerted at intermediate positions is a question of some difficulty, a very little consideration will serve to show that the force to be applied, increases with, and in a greater degree than, the angle between the directions of E and F. For suppose the direction of F to coincide with that of A B, then no force exerted, however great, would support C, the whole effect being to move the lever in the direction of its length. Let the shoulder of the horse be considered. The point of the shoulder — the shoulder-joint — is the pivot or centre of motion ; the leg attached to the bone of the arm is the weight ; the shoulder-blade being more fixed, is the part whence the power emanates, and the muscles extending from the one to the other are the lines in which that power is exerted. These lines approach much more nearly to a perpendicular in the obUque than in the upright shoulder (see cut). In the upright one, the shoulder-blade and the bone of the arm are ahnost in a straight hne, and the real action and power of the muscles are considerably diminished. In this point of view the obHque shoulder is most important. It not only gives exten- sive action, but facility of action. The power of the muscles is more than doubled by being exerted in a line approaching so much nearer to a perpendicular. There is yet another advantage of the obHque shoulder. The point of the shoulder is projected forward; and therefore the pillars which support the fore part of the horse are likewise placed proportionately forward, and they have less weight to carry. They are exposed to less concussion, and especially concussion in rapid action. The horse is also much safer ; for having less Aveight situated before the pillars of support, he is not sohkely to have the centre of gravity tlirown before and beyond them by an acci- dental trip ; or, in other words, he is not so likely to fall ; and he rides more pleasantly, for there is far less weight bearing on the hand of the rider, and annoying and tiring him. It likewise unfortunately happens that nature, as it were to supply the deficiency of action and of power in an upright shoulder, has accumulated on it more muscle, and therefore the upright°shoulder is proverbially thick and cloddy; and the muscles of the breast which were designed to strengthen the attachment of the shoulders to the chest, and to bind them together, must, when the point of the shoul- der lies backward, and under the horse, be proportionately thickened and strengthened, and the horse is thus still more heavy before, more unplea- sant, and more unsafe to ride. Then, ought every horse to have an obhque shoulder ? No. The ques- tion has relation to those hoi-ses that are designed to ride pleasantly, or from which extensive and rapid action is required. In them it has been said that an oblique shoulder is indispensable: but there are others which are seldom ridden ; whose pace is slow, and who have nothing to do but to throw as much weight as possible into the collar. To them an upright shoulder is an advantage, because its additional thickness gives them additional weight to throw into the collar, which the power of their hinder quarters is fully sufficient to accomplish ; and because the upright position 662 THE HUMERUS, OR LOWER BOXE OF THE SHOULDER of tlie shoulder gives that direction to the collar which enables the horse to act upon every part of it, and that inclination of the traces which will ennble his weight or power to be most advantageously employed. An improved breed of our heavy draught-horses has of late years been attempted, and with much success. Sufficient uprightness of shoulder ia retained for the purposes of draught, while a slight degree of obhquity has materially quickened the pace and improved the appearance. Above its junction with the humerus, or lower division of the limb, the shoulder-blade forms Avhat is called the point of the shoulder. There is a round blunted projection, best seen in the cut (p. 360). The neck of the shoulder-blade there forms a shallow cavity, into which the head of the next bone is received. The cavity is shallow because extensive motion is required, and because both of the bones being so moveable, and the motion of the one connected 60 much Tvith that of the other, dislocation was less likely to occur. A capsular ligament, or one extending round the heads of both bones, con- fines them securely together. THE HUMEKUS, OR LOWER BONE OF THE SHOULDER. Forming a joint with the shoulder-blade at the point of the shoulder is the humenis. It is a short strong bone, slanting backward in an opposite direction to the shoulder-blade. At the upper part it has a large round head, received into the shallow cavity of the shoulder-blade, or as Mr, Percivall has graphically described it, 'it is the segment of a globe, smooth and pohshed, evidently for the purpose of playing Hke a spherical hinge within the cup-like concavity occupying the place of the apex of the scapula. There are no two bones in the skeleton whose articular connec- tion is of a nature to admit more varied and extensive motion than exists between the scapula and the humerus. If we attempt to hft a horse's fore-leg, we cannot merely bring it forward and carry it backward, but we can also to a considerable extent make it perform a sort of rotatory motion, in consequence of the mobility existing in this joint between the socket of the scapula and the head of the humerus.' It has several protuberances for the insertion of muscles, and is terminated below by two condyles or heads, which in front receive the principal bone of the arm between them as in a groove, thus adding to the security and strength of the joint, and limiting the action of this joint and of the limb below to mere bending and extension, without any side motion. Farther behind, these heads receive the elbow deep between them, in order to give more extensive action to the arm. In a well-formed horse this bone can scarcely be too short, in order that the fore-legs may be as forward as possible, for reasons already stated, and because when, the lower bone of the shoulder is long, the shoulder must be too upright. Dislocation can scarcely occur in either of the attachments of the bone, and fracture of it is very rare. The lower bone of the shoulder and the shoulder-blade are by horsemen confounded too-ether, and included under the appellation of the sho^clder, and in com- pliance with general usage we have described them as combining to form the shoulder. This, however, is not correct, and will lead to error when we wish to compare the fore-leg of the horse with the arm of man. In man the arm, of which the humerus is the bone, is perfectly free and detached from the body ; in the horse it Hes in juxtaposition with the chest, and is included in the integument covering the body : and this fact has led to the error so commonly made of calling that part of the fore- leg of the liorse the arm, which is in reality the fore-arm, corresponding with the fore-arm of man below the elbow. The knee as it is called, in SPRAIN OF THE SHOULDER. 863 the horse, corresponds mth the human wrist ; and the joints below it with the fingers, supposing they were all united m one. SPRAIN OF THE SHOULDER. These muscles are occasionally injured by some unexpected shock. Al- though i "not more than one case in twenty is the farner nght when he rXs of his shoulder-lameness, yet it cannot be domed, that the muse es Sile shoulder are occasionally sprained. This is effected oftener by a shp ot the ^^o^^^^;;^, . . aithouo-h violent exertion. The muscles are also Z^rhardThstance, such as a tree or wall, when jumping, or running some l^'^^ f 7'^J^'^l,^^t,le importance to be able to distmguish the Zflder alnesrfrom iBJuries^of other parts of the fore exti^emity. There may norbe much teideimess, or heat, or sweUing if it is a sprain of musS deeply seated, and where these symptoms of injury are not • TaSv Pvident If on standing before the horse, and lookmg at the '"^n? tSwrshouldei, or rather^heir points, one should appear evi- dently la^Jr than the other, this must not be considered as indicative o spra n 0^0 muscles of th^ shoulder. It probably arises from bruise of the ioiSt of the shoulder, which a shght exammation will determine ThnviSptoms, however, of shoulder-lameness can scarcely be mistaken, and wSweTelate them, the farmer will recollect that they very seldom occurred when the villag; smith pointed to the shoulder as the seat of ^scase a^d punished the animal to no purpose. In spram of the shouider t.T+n^ost min • the pain is greatest here when the weight rests on Zl dbtXuClkmene'ss^ andfhereis apecuUar quicloiess in catching UP thTh^b the moment the weight is thrown on it. _ This is particularly e^dentThen the horse is going down lull, and the injured hmb bears an evident ^^«^ ^ . wei^-ht In the stable too, when, m other cases, the t": p'ottsTPoiecT^^^^^^ before the other, tliat foot is usually flat on rheTound.^ In shoulder-lameness, the toe alone rests on the Sound Th?circumstance which most of aU characteiises this afi-ection SthJt when the foot is hfted and then brought considerably forward the horsel^Tl express very great pain, which he will not do if the lameness is L the foot o?theleg.^ This point has been longer dwelt upon, m order ILt the reader may be enabled to put to the test the many cases of Wd r-la^^^^^^ exist only in the imagination of the groom or fc siTabi of the internal muscles of the shoulder, local measures can be in spram 01 tu ^^ ^^ ^ ,^^^„, fomentations apphed, :Se hoi rould ^^^^^ quiet a! possible. The injury is someWs Joodeeplv seated for external stimulants to have veij great effect, yet an embrocation composed of oil of turpentine, water of ammonia, and soap embrocation compt daily after the fomentation, and afterwards Wnent ^^^ .^^^^P^^^f ^^'^ S^ resorted to, if the lameness is not ' ''"^rvS Vhe "SrS the horJe is an inhuman practice ; it tortu.es Ihran^al a^dTncrr^^^ the inflammation. The p.,,m, of the shoulde. rt nSw the sk-in, and blowing into the cellular stiaicture beneath until t^ s conSderably puffed up) is another relic of ignorance and barbanty. 864 THE ARM. THE ARM. The Arm, extending from tlie elbow to the knee (see K and L, p. 140, and also cut, p. 360), consists in the young horse of two distinct bones. The long and front bone, called the radius, is nearly straight, receiving into its upper end the lower head of the humerus ; and the lower end corresponding with the upper layer of the bones of the knee. The short and hinder bone is called the ulna. It has a very long and powerful projection, received between the heads of the humerus and called the elbow ; it then stretches down, narrowing by degrees (see L, p. 140, and the cut, p. 360) to below the middle of the front bone, where it terminates in a point. The two bones are united together by cartilage and hgament ; but these are by degrees absorbed and changed to bone, and before the horse becomes old the whole of the arm consists of one bone only. It will be perceived that, from the slanting direction of the humerus, the weight of the horse, and the violence of the concussion, will be shared between the radius and the ulna, and therefore less liable to injure either. The circumstance, also, of so much weight and jar being communicated to them, will account for the extensive and pecuharly strong union between these bones in the young horse ; the speedy inflammation of the uniting substance and absorption of it, and the substitution of bone, and complete bony union between the radius and ulna, in the old horse. The immense muscles that are attached to the point of the elbow likewise render it necessary that the union between these bones should be very strong. The arm is a most important part of the horse, as vnU be seen when _ we describe the muscles which belong to it. The muscles proceeding from the shoulder-blade and the humerus, and inserted into the elbow, are the grand agents in extending the arm, and in proportion to the power which they exert will be the quickness and the length of the stride. The strength of the horse, so far as his fore-Hmbs are concerned, principally resides here. Then there will naturally be a large and muscular arm, and such a formation of the limb, and particularly of the elbow, as vrill enable these muscles to act with most advantage. The principle of the lever (referred to at p. 360) is here beautifully appHcable. The elbow-joint is the centre of motion ; the whole of the lower part of the leg is the weight to be raised ; and the power by which it is to be raised, in one act of progression— the extending of the Hmb, is the muscles inserted into the elbow. In proportion as the weight is more distant than the power from the centre of motion, as it is in the construc- tion of this limb, so will be the greater degree of energy requisite to be exerted. Supposing that the weight, taking the knee to be the centre of it, is eighteen inches from the elbow joints — that the limb weighs 60 lbs., and that the elbow projects two inches from the joint — then an energy equal to nine times the weight, or 540 lbs., will be needed to move and extend the limb, because the weight is nine times farther from the centre of motion than the power is. If in another horse the point of the elbow projects three inches from the joint, the weight of the leg remaining the same, only six times the force, or 360 lbs., will be required, making a difference in, or saving of, muscular action, equal to 180 lbs. in each extension of the arm. If a few pounds in the weight of the rider tell so much for or against the horse in a long race, this sa^dng of power must make an almost incalculable difference ; and^ therefore, judges of the horse rightly attach so much importance to the depth of the elbow, or the pro- jection of the point of the elbow from the joint. THE ARM. . S6o When describing the proper obhquity of the shoulder, it Avas stated that the power was exerted with most advantage in a line perpendicuJar to tho arm of the lever, and that the slightest deviation from that Hne was mani- festly disadvantageous. If the reader will examine the cut, he will perceive that muscles from the shoulder and the bone of the arm take a direction much nearer to a perpendicular line in the long than in the short elbow, and therefore act with proportionably greater advantage ; and if this advantage from the direction in which the power is applied to that which we gain from the increased length of the bone is considered, it will bo plain that the addition of one-third to the length or projection of the elbow would be attended bj a saving of one-half in the expenditure ol muscular power. There is, however, a limit to this. In proportion as the elbow is lengthened, it must move over a greater space in order to give the requisite extension to the hmb ; and consequently the muscles which act upon it must be lengthened, otherwise, although the action might be easy, it would be confined. There must be harmony of proportion in the different parts of the hmb, but a deep elbow, within a certain range, is always connected with increased power of action. Enlargements sometimes appear about the elbow, either the consequence of a violent blow, or from the calkins of the shoes injuring this part when the horse sleeps with his legs doubled ujider him. If a seton is passed through the tumour, it will sometimes rapidly diminish, and even disap- pear ; but if it is of considerable magnitude, the skin should be opened along the middle of the swelling, and the tumour dissected out. The result of these operations may be successful, but if the operator does not repent of having performed them long before they heal again, he is a very foi-tunate fellow. The better part of valour, however, is discretion, and in the cases alluded to, supposing, as is generally the case, that no bad effect beyond the eyesore accompanies it, it had better, much better, be left alone. One of the most powerful muscles for bending the leg, the flexor hracliii, arises from the point of the shoulder, in the form of a large round tendon, which runs over a groove or pulley in the front of the humerus : it then swells out into a round fleshy body, contributing materially to the bulk in front of the arm, and is inserted into a tubercle in the inner and upper part of the radius. It is the main muscle by which, almost alone, the whole of the leg below the arm is bent. It acts at great disadvantage. It is inserted into the very head of the bone of the arm, and expanded even upon the joint. Then the power is apphed almost close to the centre ot motion, while the weight to be raised is far distant from it. The power is thirty times nearer the centre of motion than is the weight, and calcu- lating as before, the weight of the arm and rest of the hmb at 60 lbs., it must act with a force of thirty times sixty, or 1,800 lbs. In addition to this, the line of the direction of the force strangely deviates from a per- pendicular : the direction of the muscle is nearly the same as that of the limb, and the mechanical disadvantage is almost incalculably great. TTe will take it as only ten times more : then this muscle, and its feeble coadjutors, act with a force of ten times 1,800 or 18,000 lbs. Why this almost incredible expenditure of mtiscular power ? First, that the beauty of the limb might be preserved, and the joint might be compact. K the tendon had been inserted half way down the arm, the elbow-joint would have offered a very unsightly appearance. Beauty of form, however, is but the least result of this conformation. Extensive and rapid motion are among the excellences of the horse. He is valuable in proportion as he has them combined with stoutness ; and by this conformation of the hmb could he alone obtain them. Therefore the tendon is at first unusually strong : it plays through the natural but 366 , THK £XEE. perfect pulley of tlie bone of the arm without friction ; the body of the muscle is mixed with tendinous fibres, and the insertion into the fore-arm is very extensive, lest the application of such immense force should tear it from its adhesions. There is sufficient strength in the apparatus ; the power may be safely applied at this mechanical disadvantage ; and it is applied close to the joint to give an extent and rapidity of motion which could not otherwise have been obtained, and without which the horse would have been comparatively useless. It is sufficiently plain that the arm should be large and muscular, other- wise it could not discharge all these duties. Horsemen differ on a variety of other points, but here they agree. A full and swelling fore-arm is the characteristic of every thorough -bred horse. Whatever other good points the animal may possess, if the arm is narrow in front and near the shoulder, fiat on the side, and altogether deficient in muscular appearance, that horse is radically defective. He can neither raise his knee for rapid action, nor tlirow his legs sufficiently forward. . The arm should like^vise be long. In proportion to the length of the muscle is the degree of contraction of which it is capable ; and in propor- tion also to the degree of contraction "will be the extent of motion in the limb beneath. A racer, with a short arm, would be sadly deficient in stride; a hunter, with the same defect, would not be able to double his legs Avell under him in the leap. There is, however, a medium in this, and the advantage of length in the arm will depend on the use to which the horse is applied. The lady's horse, the cavalry horse, every horse in which prancing action is esteemed a beauty, and in which utility is, to a certain degree, sacrificed to appearance, must not be too long in the arm. If he is long tliei-e, he will be proportionably short in the leg ; and although this is an undoubted excellence, whether speed or continuance is regarded, the short leg will not give the grand and imposing action which fashion may require. In addition to this, a horse vrith short legs may not have quite so easy action as another whose length is in the shank rather than in the arrtL THE KNEE. The K7iee (M, p. 140, and cut p. 360), answering to the human wrist, constitutes the joint or joints between the arm and the shank or leg ; and is far more complicated than any joint that has been yet considered. Be- side the lower heads of the bone of the arm, and the upper heads of the three bones of the leg, there are no less than six other bones interposed, arranged in two rows, three in each row, and two others, the seventh and eighth, placed behind. What was the intention of tliis compHcated structure ? A joint between the elbow and the fetlock was absolutely necessary to the action of the horse. An inflexible pillar of that length could scarcely have been lifted from the ground, much less far enough for rapid or safe motion. It was likewise necessary that the interposing joint should be so constituted as to preserve this part of the limb in a straight direction, and possess suf- ficient strength to resist all common work and accidents. Being in a straight direction, the shock or jar between the ends of the bones of the arm and the leg would be dreadful, and would speedily inflict irreparable injury. The heads of all bones are covered with cartilage, in order to protect them from injury by concussion; but this would be altogether in- sufficient here. Six distinct bones are therefore placed here, each covered above and below by a thick coating of cartilage, connected together by strong ligaments, bat separated by interposed fluids and membranes. The BROKEN KNEES. 3G7 ooncussion is thus spread over tlie whole of them, shared by tho whole of them, and, by the pecuUarity of their connection, rendered harmless. These six distinct bones, united to each other by numerous and powerful ligaments, will also afford a far stronger joLut than the apposition of any iivo bones, however perfect and strong might be the capsular ligament, or by whatever other hgaments it might be strengthened. In addition to the connection between the individual bones, there are three capsular liga- ments, one extending from the radius to the first row of metacarpal bones, the second from the first to the second row, and the third from the second row to the metacarpal bones ; and the result of the whole is, that the hardest work and the severest accidents produce little deformity, and no dislocation in the knee ; nor do the shocks and jars of many a year cause iuflammation or disease. It is an undeniable fact that such is the perfect construction of this joint, and to so gi-eat a degree does it lessen concus- sion, that the injuries resulting from hard work are, almost without a.n excep- tion, found below the knee, which seems to escape the injuries of the hock. There is a remarkable difference in the effects of work on the knee and the hock. The knee is subject to enormous concussion, but to a certain extent escapes those bony enlargements and inflammations of the Hgaments, like spavins. The seventh bone, the tra2)ezlum, so called from its quadrang-ular figure, is placed (see M, p. 140) behind the others, and does not bear the shghtest poi-tion of the weight. It, however, is exceedingly useful. Two of the flexor muscles proceed from the bone of the arm, and are inserted into it; and, being thus thrown off the limb, have a less oblique direction given to them, and, therefore, according to the principle of the lever, act with considerably more power. It is also useful in another way. As the ten- dons of the various muscles descend the limbs, they are tied down, as we have described, by strong ligamentous bands : this is particularly the case in the neighbourhood of the joints. The use of it is evident. The extensor tendons, which lie principally on the front of the leg, are prevented from starting and strengthened and assisted in their action ; but the flexor tendons, which are at the back, would be liable to friction, and their motion impeded, if they were bound down too tightly. This projecting bone prevents the annular or ring-like ligament from pressing too closely on tho main flexor tendons of the foot ; and, while it leaves them room to play, leaves room Ukewise for a synovial sheath to surround them, supplying the coui'se of the tendons with a fluid that prevents much injurious friction. The eighth bone, small in size, being not larger than a pea a little flattened, is called the pisifoiin ; it is placed posteriorly at the inner and lower part of the knee. The knee should be broad. It should present a very considerable width, compared with the arm above, or the shank below. In proportion to the breadth of the knee is the space for the attachment of muscles, and for the accumulation of hgamentous expansions and bands. In proportion to the breadth of the knee there will be more strength ; and likewise the direction of some muscles will be less oblique, and the course of others will be more removed from the centre of motion, in either of which cases much power wiU be gained. BROKEN KNEES. The treatment of broken knees is a subject of considerable importance, for many horses are sadly blemished, and others are destroyed, by wounds in the knee-joint. The horse when falling, naturally throws his knees forward ; they receive all his weight and are sometimes very extensively lacerated. The first thing to be done is. by very careful washing with 3G8 BROKEX KNEES. cold water, to cleause the wound from all gravel and dirt. It must then be ascertained whether the joint is penetrated. The grating of the probe on one of the bones of the knee, or the depth to which the probe enters the wound, will too plainly indicate that the joint has been opened. Should any doubt exist, a linseed-meal poultice must be applied. This will at least act as a fomentation to the wound, and will prevent or abate in- flammation ; and when, twelve hours afterwards, it is taken off, the synovia or joint-oil, in the form of a glahy, yellowish, transparent fluid, -nill be seen, if the capsular ligament has been penetrated. It having been ascertained that the interior of the joint is not injured, attention must be paid to the wound that is actually made. The horse should wear a cradle to prevent his getting at the wound. A stimulating apph cation — turpentine and oil in equal parts is as good as any — should be hghtly applied every day until healthy pus is produced on the wound, and then a little friar's balsam will probably efiect a cure. The opening of the joint, however, being ascertained, the first and immediate care is to close the orifice ; for the fluid which separated and lubricated the bones of the knee being suffered to escape, they will be brought into contact with, and will rub upon, each other ; the delicate membrane with which they are covered will be highly inflamed ; the constitution will be speedily afiected, and a degree of fever will ensue that will destroy the horse; while, in the meantime, of all the tortures that can be inflicted on the poor animal, none can equal that which accompanies inflammation of the membranes lining the joints. The manner of closing the orifice must be left to the judgment of the veterinaiy surgeon, who alone is capable of properly treating such a case. It may be efi"ected by a compress enclosing the whole of the wound, and not to be removed for many days ; or it may be attempted by the old and generally successful method of applying the hot iron over the wound, and particularly over the spot where the ligament appears to be lacerated. The surgeon will find no difficulty in determining whether the sharp edge of the common firing-iron should be used, as would be the case if the laceration is considerable ; or whether the budding-iron should be resorted to. After the use of the cautery, the application of a blister may, in some cases, be serviceable. Should the joint-oil continue to flow, the iron may be applied a second, or even a third time. By its application synovia is coagulated, so much swelling is produced on the immediate puncture, and in the neighbouring parts, as mechanically to close and plug up the orifice. If, however, the opening into the joint is extensive, and the joint-oil continues to flow, and the horse is evidently sufiering much pain, humanity will dictate that he should be destroyed. The case is hopeless. A high degree of fever will ere long carry him off", or the inflammation will cause a deposit of matter in the cavity of the joint that "will produce incurable lameness. The pain caused by the iron is doubtless great ; it is, however, neces- sary : but let no reader of ' The Horse ' permit the torturing experiments of the farrier to be tried, who will frequently inject stimulating fluids, and even oil of vitriol, into one of the most sensible and ii'ritable cavities in the whole frame. A person well acquainted with the anatomy of the part will judge of the probabihty of a favourable result, not merely by the extent, but by the situation of the wound. If it is low down, and opposite to the bottom row of the bones of the knee, a small opening into the joint will be easily closed. A larger one needs not to cause despair, because there is little motion between the lower row and the bones of the leg. If it is high up, TITE LEG. 869 there is more danger, because there is more motion. If it is situated opposite to the union of the two rows, the result is most to be dreaded, because between these is the principal motion of the joint, and that motion will not only disunite and irritate the external wound, but cause dreadfal friction between the bones brought into actual contact with each other, through the loss of the joint-oil. Wlien the knee has been much lacerated, although the wound may be healed, some blemish will remain. The extent of this blemish will depend on that of the original wound, and more especially on the nature of the treatment that has been adopted. Every caustic apphcation will destroy a portion of the skin, and leave a certain mark. Should the blemish be considerable, a mild blister may be applied over the part, after the wound has healed. It will stimulate the hair to grow more rapidly and thickly round the scar, and particularly haii^ of the natural colour ; and, by con- tracting the skin, it will lessen the scar itself. Many persons have great faith in ointments that are said to promote the growth of the hair. Kthey have this property, it must be from their stimulating the skin in which the roots of the hair are imbedded. These ointments usually contain a small portion of blistering matter, in the form of turpentine, or the Spanish fly. The common application of gunpowder and lard may, by blackening the part, conceal the blemish, but can have no possible efiect in quickening the growth of the hair. In examining a horse for purchase, the knees should be very strictly scrutinised. A small blemish on them should not induce us at once to condemn the animal, for a bad rider or the merest accident may throw the safest horse. A broken knee, however, is a suspicious circumstance, and calls for the most careful observation of the make and action of the horse. If it is accompanied by a thick and upright shoulder, and legs far under the horse, and low slovenly action, he is unwise who does not take the hint. This faulty conformation has produced its natural consequence. But if the shoulder is oblique, and the pastern of the proper length and inclination, and the fore-arm strong, the good judge -will not reject the animal because he may have been accidentally thrown. From the com- plicated nature of this joint, from its being placed so immediately under the centre of gravity, and having to receive the entire weight of the horse and rider, the concussion is so severe as frequently to produce diffuse inflammation of the synovial and other tissues. Race-horses are very frequently lame from diseased knees, which veterinary authors say but little about. The animal should have rest ; a dose of physic should be given, with antiphlogistic applications to the knee, to be followed by counter- irritation in the shape of a blister. Several valuable race-horses have suffered from this disease, some of them when only two years old. THE LEG. The part of the limb between the knee and the fetlock consists of three bones : a large one in front, called the cannon or shank, and two smaller or splint bones behind (see N, p. 140). The shank-bone is rounded in front, and flattened, or even concave, behind. It is the straightest of the long bones, as well as the most superficially situated, for in some parts it is covered only by the skin. The upper head is flat, with slight depres- sions corresponding with the lower row of the bones of the knee. The lower head is (differently and curiously formed. It resembles a double pulley. There are three elevations ; the principal one in the centre, and another on each side. Between them are two slight grooves, and these so precisely correspond with deep impressions and slight prominences in the B B 370 SPLINT. apper head of the larger pastern, and are so enclosed and guarded by the elevated edges of that bone, that when the shank-bone and pastern are fitted to each other, they form a perfect hinge. They admit of the bend- ins: and extension of the limb, but of no lateral or side motion. This ia ^ /> • .... a circumstance of very great importance m a joint so situated, and having the whole weight of the horse thrown upon it. The smaller bones are placed behind the larger ones on either side. A shght projection of the head of each can alone be seen in front. The heads of these bones are enlarged, and receive part of the weight con- veyed by the lower row of the bones of the knee. They are united to the larger bone by the same kind of substance which is found in the colt be- tween the bone of the elbow and the maiu bone of the arm ; and which is designed, by its great elasticity, to lessen the concussion or jar when the weight of the animal is thrown on them. They reach from one half to two thirds of the length of the shank-bone, and, through their whole extent, are united to it by this substance ; but, as in the elbow, from the animal being worked too soon or too violently, bony matter is deposited in th(y room of the Hgamentous, and a bony union takes place instead of the natural one. There is no doubt that the ease of motion is somewhat lessened by this substitution of bone, but other elastic principles are probably called into more powerful action, and the value of the horse is not perceptibly impaired, although it is hard to say what secret injury may be done to the neighbouring joints, and the cause of which, the lameness not appearing until a distant period, is not suspected. In this process, however, mischief does often immediately extend to tht neighbouring parts. The disposition to deposit bone, reaches beyond the circumscribed space between the larger and smaller bones of the leg, and a tumour, first callous, and afterwards bony, is found, with part of its base resting on the line of union between these bones. This is called a SPLINT. The splint is generally found on the outside of the small bones, and fre- quently on the inside of the leg. Why it should appear on the outside ot the small bones it is difiicult to explain, except that the space between these bones is occupied by an important mechanism, which will be presently described ; and, as in the case of abscess, a natural tendency was given to them to determine outward, that vital parts might not be injured. The cause of their almost exclusive appearance on the inside of the leg admits of easier explanation. The inner splint-bone is placed nearer the centre of the weight of the body than the other, and, from the nature of its connection with the bones of the knee, actually receives more of the weight than does the outer bone, and therefore is more liable to injury, from the jar and concussion occasioned by the action of the horse ^vith a superadded weight above, and harsh unyielding roads below, inflam- mation is set up, and this consequent deposit of bony matter. The inner bone receives the whole of the weight transmitted to the small bone of the knee. It is the only support of that bone. A portion only of one of the bones rests on the outer splint-bone, and the weight is shared between it and the shank. In addition to this there is the absurd practice of many smiths of raising the outer heel of the shoe to an extravagant degree, which throws still more of the weight of the horse on the inner splintr- bone. Cony tumours occasionally appear on other parts of the shank-bone, being the consequence of violent blows or other external injuries, and ar^ commonly called splints. "\Yhen the splint of either sort is forming, the horse is frequently lame^ for the periosteum or membrane covering the bone is paLnfully stretched SPLINT. 37] but wlien tliis membrane lias accom.inodated itself to the tumour that ex- tended it, the lameness subsides, and altogether disappears, unless the splint be in a situation in Avhich it interferes with the action of some ten- don or ligament, or in the immediate neighbourhood of a joint. Pressing upon a ligament or tendon, it may cause inflammation of those substances; or, being close to a joint, it may interfere with its action. Splints, then, although, strictly speaking, cause unsoundness, may not materially lessen the action or value of the horse. The treatment of splints is exceedingly simple. The hair should be closely shaved ofl' round the tumour, and this followed by an active bhster. If the splint is of recent formation, it will generally yield to this, or to a second bhster. Should it however resist these applications, it can rarely be advisable to cauterise the part, unless the tumour materially interferes with the action of the suspensory hgament, or the flexor tendon ; for it not unfrequently happens, that, although the splint may have apparently resisted this treatment, it will afterwards, at no great distance of time, begin rapidly to lessen, and quite disappear. There is also a natural pro- cess by which the gi-eater part of splints disappear when the horse grows old. The late Professor Sewell introduced a new treatment of splints described in the eighth volume of the ' Veterinarian,' which is certainly ingenious, and generally successful. He removes any inflammation about the part by the use of poultices or fomentations, and then, the horse being cast, an operation is performed ; this is commenced by pinching up the skin, im- mediately above the bony enlargement, with the finger and thumb of the left hand, and with the knife, or lancet, or scissors, making an orifice sufficient to introduce a probe-pointed bistoury, with the edge on the convex side. This is passed under the skin along the whole length of the ossification beneath, cutting through the thickened periosteum down to the bone ; and this being eSectually completed by drawing the knife backwards and forwards several times, a small tape or seton is inserted, and, if the tumour is of long standing, kept in a few days. The operation is attended with very little pain to the animal. Perhaps slight inflammation may appear, which subsides in a few days if fomentation is used. The inflammation being removed, the enlargement considerably subsides, and in many cases becomes quite absorbed. This is a great improvement on the practice, though the efi'ect and the result are the same as in the old system formerly adopted in many parts of the countrj', and not now obsolete where vete- rinary assistance is not within reach, of at once cutting down on the spHnt, when the pain is at once removed, and the wound heals readily, with Httle or no blemish. The inside of the leg, immediately under the knee, and extending to the head of the inner splint-bone, is subject to injury from what is termed the sjieedy cut. A horse with high action, and in the fast trot, violently strikes this part, either wdth his hoof or the edge of the shoe. Horses that are termed dancing masters from turning out their toes, are more specially liable to this serious defect, from the peculiar position of the limbs ine-\atably producing a crossing in their action. Sometimes bony enlargement is the result, at others great heat and tenderness ; and the pain from the blow seems occasionally to be so great that the horse drops as if he were shot. The only remedy is to take care that no part of the shoe projects beyond the foot ; and to let the inner side of the shoe — except the country is very deep, or the horse used for hunting — have but one nail, and that near the toe. Care should like^vise be taken that the shoe is of equal thickness at the heel and the toe, and that the bearing is equal on both sides. This, however, is a very serious defect, for the animal is in danger of falling suddenly without the slightest warning, and if it R F % b72 PEREOSTITIS (SORE SHINS). cannot be corrected by a change of shoeing, sbonld always be viewed witt euspicion. PEREOSTITIS (SCRE SHINS ). This disease is most frequently met with amongst race-horses, and con- sists of a difiused inflammation of the periosteum or covering of the bone, as a result of the gi-eat amount of work upon the hard ground which these young animals have to undergo in the process of training. The animal is generally very lame, and will give evidence of pain on pressure being applied to the front of the leg. Our treatment should consist in keeping the animal at rest, the application of warm fomentations, and the administration of a dose of physic. If the inflammation be very acute blood may be drawn from the brachial vein. When the inflammation has abated, the application of a gentle stimulant, such as the vinegar of can- tharides, will be very beneficial. SPRAIN OF THE FLEXOR TENDONS OR BACK SINEWS. At the back of the arm are flexor muscles of great power, to bend th© lower portions of the limb. The first is the perforated flexor muscle : thp- reason of the name ^vill presently appear. It arises from the lower and back part of the inner head of tlie lower bone of the shoulder, and inter- mixed with, or rather between the origins of the muscles next to be described, and called the perforating muscle. As it descends along the bone of the arm it becomes tendinous ; and approaching the knee it is bound down by bands of ligament. Proceeding from the knee it widens, and partly wraps round the tendon of the perforating muscle, and they run down together in contact, yet not adhering ; freely playing over each other, and synovial fluid obviating all friction. Both of them are enclosed in a sheath of dense cellular substance, and they are hkewise supported by various ligamentous expansions. Near the fetlock the tendon still farther expands, and forms a complete ring round the tendon of the per- forating muscle. The use of this will be best explained when we aro treating of the fetlock. 1'he perforated tendon soon afterwards divides, and is inserted into the smaller and larger pastern-bones, and flexes or bends them. The next is the j)erf orating flexor muscle. It has nearly the same origin as the other, but with somewhat distinct heads. It continues muscular farther down the arm than the perforated, and lies before it. At the knee it passes, like the perforated, under strong ligamentary bands, which confine it to its situation. It then becomes round, and is partly wrapped up in the perforated, and at the fetlock is entirely surrounded hj it. It emerges from the perforated when that tendon divides, and continues its progress alone, after the other has inserted itself into the pasterns, and, passing over the navicuJar-bone, terminates on the base of the cofiin-bone, or bone of the foot. As they descend the back part of the leg, the tendons of the per- forated and perforating flexor muscles should be far and distinctly apart from the shank-bone. There should be space free from thickening for the finger and thumb on either side to be introduced between them and the bone, and that extending from the knee to the fetlock. In a perfect leg, and towards its lower part, there should be three distinct and perfect pro- jections visible to the eye, as well as perceptible by the finger ; the sides of the shank-bone being the most forward of the three ; next, the suspen- sory ligament ; and, hindermost of all, the flexor tendons. When these are' not to be distinctly seen or felt, or there is considerable thickening about and between them, and the leg is round instead of flat and deep, SPRAIN OP THE FLEXOR TENDONS OR BACK SINEWS. 37;* fchei'e has been what is commonly, but improperly, called a sprain of the back tendons. These tendons are enclosed in a sheath of dense cellular substance, in order to contine them in their situation, and to defend them from injury. Between the tendon and the sheath there is a fluid to prevent friction ; but when the horse has been over- worked, or put to sudden and violent exertion, the tendon presses upon the delicate membrane lining the sheath, and inflammation is produced. A difierent fluid is then thrown out, which coagulates, and adhesions are formed between the tendon and the sheath, and the motion of the limb is more difficult and painful. At other times, from violent or long- continued exertion, some of the fibres which confine the tendons are ruptured. A slight injury of this nature is called a sprain of the back sinews or tendons ; and, when it is more serious, the horse is said to have hrohen doton. The first injury is confined to inflam- mation of the sheath, or rupture of a few of the attaching fibres. This Luflammation, however, is often very great, the pain intense, and the lame- ness excessive. The anguish expressed at every bending of the limb, and the local swelling and heat, will clearly indicate the seat of injury. In every serious affection of this kind, care should be taken that the local inflammation does not produce general disturbance of the system ; and therefore the horse should be bled and physicked. The bleeding may be at the toe, by which an important local, as well as general, eS'ect will be produced. The vessels of the heart will be relieved, while fever will be prevented. Let not the bleeding be performed in the farrier's usual way of first paring down the sole, and then taking out a piece of it at the toe of the frog ; in which case a wound is made often difficult to heal, and through which fungous granulations from the sensible parts beneath will obstinately spring : but, after the sole has been well thinned, let a groove be cut with the rounded head of a small drawing-knife, at the junction of the sole and the crust. The large vein at the toe will thus be opened, or the groove may be widened backward until it is found. When the blood begins to appear, the vein may be more freely opened by a small lancet thrust hori- zontally under the sole, and almost any quantity of blood may be easily procured. The immersion of the foot in warm water vrill cause the blood to flow more rapidly. A sufficient quantity having been withdrawn, a bit of tow should be placed in the groove, and a patten shoe tacked on, by which the heels may be raised from the ground, and much tension re- moved from the sinews. The bleeding will thus be immediately stopped, and the wound will readily heal. A full dose of physic should be given as soon as the horse could be prepared ; and, after its operation, low and moist diet should be persisted in till the inflammation and pain have subsided. As a local appHcation, no hot farrier's oil should come near the part, but the leg should be well fomented with warm water two or three times in the day, and an hour at each time. The beneficial efiect depends sim- ply on the warmth of the water and the moisture. All stimulating applications vrill infallibly aggravate the mischief. The horse beginning to put his foot better to the ground, and to bear pressure on the part, and the heat having disappeared, the object to bo accomphshed is changed. Recurrence of the inflammation must be pre- vented, the enlargement must be got rid of, and the parts must be strengthened. The two latter purposes cannot be better efiected than by using a bandage : one of thin flannel used to be the best, but is now entirely superseded by the linen ones. This will sustain and sup- port the limb, while by few means are the absorbents sooner induced to take up the effused coagulable matter of which the swelling is composed 374 SPRALV OF THE FLEXOR TENDONS OR BACK SINEWS. fchan by moderate pressure. The bandage sbould be kept constantly wet with cold water — to each pint of which a quarter of a pint of spirit of wine has been added — the skin will be slightly stimulated and contracted, and the cold produced by the constant evaporation will tend to subdue the remaining and deep-seated inflammation. This bandage should be daily tightened in proportion as the parts are capable of bearing increased pressure, and the treatment should be persisted in for a fortnight. If, at the expiration of that period, there is no swelling, tenderness, or heat, the horse may gradually, and very cautiously, be put to his usual work. Should there, however, remain the slightest lameness or considerable enlargement, the leg must be blistered, and, indeed, it would seldom be bad practice to blister after every case of severe sprain : for the inflamma- tion may lie deep in the sheath of the tendons, and the part once sprained may long remain weak, and subject to renewed injury, not only from un- usual, but even ordinary exertion. If a blister is resorted to, time should be given for it to produce its gradual and full effect, and the horse should be afterwards turned out for one or two months. We must here be per- mitted to repeat that a bhster should never be used while heat or tender- ness remains about the part, otherwise the sKghtest injury may be, and often is, converted into incurable lameness. Veiy severe sprains, or much oftener, sprains badly treated, will require the appKcation of the cautery. K from long-continued inflammation the structure of the part is materially altered, — if the swelling is becoming callous or the skin is thickened and prevents the free motion of the limb, no stimulus short of the hot iron will be sufficient to rouse the absorbents to remove the injurious deposit. The principal use of firing is to rouse the absorbents to such increased action that they shall take up and remove the diseased thickness of the skin, and likewise the unnatural deposit in the cellular substance beneath. The firing should be apphed in straight lines, because the skin, contracting by the application of the cautery, and gi-adually regaining its elastic nature, will thus form the best bandage over the weakened part. It should likewise be as deep as it can be applied, even occasionally penetrating the skin. Here, even more particularly than in the bhster, time should be given for the full action of the firing. This removal of diseased matter is a work of slow progress. Many weeks pass away before it is perfectly accomplished ; and, after firing, the horse should have at least a six months', and it would be better if he could be given a twelve months' run at grass. When the animal has been set to work in a few weeks, and the enlargement remains, or lameness returns, the fault is to be attributed to the impatience of the owner, and not to tha want of power in the operation or skill in the operator. Farriers are apt to blister immediately after firing. A blister may be useful six weeks or two months after firing, if lameness remains ; but can never be wanted immediately after the severe operation of the cautery. If the iron has been skilfully apphed, subsequent blistering inflicts on the animal, already sufficiently tortured, much unnecessary and useless pain, and should never be resorted to by him who possesses the shghtest feeUng of humanity. In examining a horse for purchase, the closest attention should be paid to the appearance of these flexor tendons. If there is any thickness of cellular substance around them, that horse has been sprained violently, or the sprain has not been properly treated. This thickening will probably fetter the motion of the tendon, and dispose the part to the recurrence of inflammation and lameness. Such a horse, although at the time perfectly free from lameness, should be regarded with suspicion, and cannot fairly WIND-GALLS. 376 be considered as sound. He is only patched up for a while, and will pro- bably fail at the close of the first day's hard work. WIND-GALLS. In the neighbourhood of the fetlock there are occasionallly found con- siderable enlargements, oftener on the hind-leg than the fore-one, which are denominated wind-galls. Between the tendons and other parts, and wherever the tendons are exposed to pressure or friction, and parti- cularly about their extremities, little bags or sacs are placed, containing, and suiFering to ooze slowly from them, a mucous fluid to lubricate the parts. From undue pressure, and that most frequently caused by violent action and straining of the tendons, or often from some predisposition about the horse, these httle sacs are injured. They take on inflammation, and sometimes become large and indurated. There are few horses per- fectly free from them. "When they first appear, and until the inflamma- tion subsides, they may be accompanied by some degree of lameness ; but otherwise, except when they attain a great size, they do not interfere with the action of the animal, or cause any considerable unsoundness. The farriers used to suppose that they contained wind — hence their name, wind-galls ; and hence the practice of opening them, by which dreadful inflammation was often produced, and many a valuable horse destroyed. It is not uncommon for wind-galls entirely to disappear in aged horses. The treatment for wind-galls cannot begin too soon. When they appear bandage the limb, from the coronet to the knee, daily with wet bandages. The wet bandage must be well wrung out of very cold water, and changed every two, three, or four hours. Upon every change of bandage the limb must be well hand-rubbed with wet hands for several minutes. The width of the bandage should not exceed three and a half inches. The wind-gall will often diminish or disappear by this treatment, but will too frequently return when the horse is again hardly worked. A blister is a more eSectual, but too often tem- porary remedy : wind-galls will return with the renewal of work. Firing is still more certain, if the tumours are sufficiently large and annoying to justify our having recourse to measures so severe ; for it will not only efiect the immediate absorption of the fluid, and the reduction of the swelling, but, by contracting the skin, will act as a permanent bandage, and therefore prevent the reappearance of the tumour. The iodine and mercurial ointments have occasionally been used with advantage, in the proportion of three parts of the former to two of the latter. LESIONS OF THE SUSPENSORY LIGAMENT. At the back of the shank just below the knee, and in the space between the two splint-bones, behind the perforatus and perforans tendon, is found an important hgament, admirably adapted to obviate concussion. It originates in the head of the shank-bone, and also in the heads of the splint-bones ; then, descending down the leg, it fills the groove between the splint-bones, but is not attached to either of them. A httle lower do-\vn it expands on either side, and, approaching the pasterns, bifurcates, and the branches are inserted into two small bones found at the back of the upper pastern, one on each side, called the sesamoid-honea. The internal branch of this Hgament is somewhat longer than the outer, more especially in limbs of a pecuhar formation, such, for mstance, as those in which the ioes are everted or turned out. (See page 360.) The bones forni a kind of joint both with the lower head of the shank-bone and the upper 376 LESIONS OF THE SUSPENSORY LIGAMENT. pastem-bone, to both of whicb tbey are united by ligaments (t and g), but much more closely tied to the pastern than to the shank. The flexor tendons pass down between them through a large synovial bag, to relieve them from the friction to which, in so confined a situation, they would be exposed. The suspensory hgament is continued over the sesamoids, and afterwards obliquely forward over the pastern to unite with the long ex- tensor tendon, and downward to the perforated tendon, which it surrounds and fixes in its place, and also to the smaller pastem-bone. It will be easy to perceive, from this description of the situation of the suspensory ligament, why splints placed backward on the leg are more likely to produce lameness than those which are found on the side of it. They may interfere with the function of this ligament, or, if they are large, may bruise and wound it. The principal action of these ligaments is with the sesamoid-bones. which they seem to suspend in their places, and they are therefore called the suspensory ligaments. The pasterns (see cut, p. 360) are united to the shank in an oblique direction, diJFering in degree in the different breeds of horses, and in each adapted to the purpose for which that breed was designed. The weight falls upon the pastern in the direction of the shank-bone, and the pastern being set on obhquely, a portion of that weight must be communicated to the sesamoids. Much concussion is saved by the yielding of the pasterns, in consequence of their obhque direction ; and the concussion which would be produced by that portion of "weight which falls on the sesamoid-bones is completely destroyed, for there is no bone underneath to receive it. They are suspended by this ligament — an elastic ligament, which gradually yields to, and is lengthened by, the force impressed upon it, and in this gradual yielding and lengthen- ing, materially lessening, or generally preventing, all painiul or dangerous concussion. K the ligament lengthens, the sesamoid-bones must descend when the weight is thrown on them, and it would appear that they do so. K the thorough-bred horse with his long pasterns is carefnUy observed as he stands, the tuft at the fetlock will be some inches from the turf; but when he is in rapid motion, and the weight is thrown violently on this joint, the tuft descends and sweeps the very ground. This, however, is from the combined action of the fetlock and pastern-joints, and the sesa- moid-bones. The sesamoids do not actually descend ; but they revolve, they partly turn over. The strong ligament by which they are attached to the pastem-bone acts as a hinge, and the projecting part of the bone, to which the suspensory hgament is united, turns round with the pressure of the weight ; so that part of the bone becomes lower. How is it raised again ? This ligament, exceptionally constructed as a Hgament, is elastic. It yields to the force impressed upon it and lengthens ; but as soon as the foot is lifted from the ground, and the weight no longer presses, and the force is remo /ed, its elastic power is exerted, and it regains its former dimensions, and the sesamoid-bone springs back into its place, and by tiiat forcible return assists in raising the Limb. Mr. Percivall very clearly desci-ibes this in his Lectures : ' Furthermore, it seems to us tliat these elastic parts assist in the elevation of the feet from the ground in those places in which they are called into sudden and forcible action. The suspensory ligament, by its reaction, instantaneously after its extension, aids the flexor muscles in bending the pastern-joints. The astonishing activity and expedition displayed in the movements of the race-horse at speed, seem to be i-eferable, in part, to the promptitude with which the suspensory ligament can act before the flexor muscles are duly THE PASTERNS. 377 pi-epared ; the latter we should say catch, as it were, and then dii-ect the limb first snatched from the ground by the powers of elasticity.' It may be supposed that hgaments of this character, and discharging such functions, will occasionally be subject to injury, and principally to strains. Mr. W. C. Spooner gives a very satisfactory account of this. He says that ' hunters and race-horses are considerably more liable to lesions of the suspensory Ugament than any other description of horses. The character of these strains is very rarely so acute as that of the ten- dons. They generally come on gradually, -with little inflammation or lameness. Occasionally the injury is sudden and severe, but then it is rarely confined to these ligaments, for although they may be principally involved, the neighbouring parts are generally implicated. The usual symptoms are a sHght enlargement and lameness at first, or there may be the former without the latter. The enlai-gement is commonly confined to the hgament below the place of bifiu-cation, and sometimes one division alone is affected. With the exception of strains of the flexor sinews, this unfits more animals for racing than any other cause — indeed horses are rarely or never fit for the turf after the suspensory ligaments have been diseased,' or for hunting. The suspensory ligament is sometimes strained and even ruptured by extraordinary exertion. The sesamoids, which in their natural state are suspended by it, and from which function its name is derived, are in the latter case let down, and the fetlock almost touches the ground. This is generally mistaken for rupture of the flexor tendon ; but one circumstance will sufficiently demonstrate that it is the suspensory hgament which is concerned, viz., that the horse is able to bend his foot. Rupture of this ligament is a bad, and almost desperate, case. The horse is frequently lame for life, and never becomes perfectly sound. Keeping him altogether quiet, bandaging the leg, and putting on a high-heeled shoe, will afibrd the most probable means of temporary relief ; but the application of the actual cautery, in its severest form, vnll alone give a chance of ultimate utility. The common injury to this Hgament is sprain, indicated by lameness and swelHng and heat, more or less severe in proportion as the neigh- bouring parts are involved. This will sometimes yield to rest and coohng treatment ; but, if the case is obstinate, it will be necessary to have recourse to the actual cautery. The hunter and the race-horse are most subject to lesions of these ligaments ; the hunter from leaping the fence, and the race-horse from the violent efforts which are occasionally demanded of him. In both cases, the neighbouring parts usually share in the injury, and a cure is rarely completely effected. THE PASTERNS. The upper pastern-hone (a in the first figure, and b in the second, in the following cuts) receives the lower pulley-like head of the shank-bone, and forms a hinge joint admitting only of bending and extension, but not of side motion ; it likewise articulates with the sesamoid-bones. Its lower head has two rounded protuberances, which are received into corresponding depressions in the lower pastern. On either side above the pastern-joint, are roughened projections, for the attachment of very strong ligaments, both the capsular ligaments, and many cross ligaments, which render the joint between the two pasterns sufficiently secure. The loioer pastern (h in the first figure, and c in the second, in the next cut) is a short and thick bone with its lai'ger head downward. Its upper head 578 THE PASTERNS. has two depressions to receive the protuberances on the lower head of the upper bone, bearing some resemblance to a pulley, but not so Fig. 1. a The upper pastern. h The lower pastern. c The navicular bone. d The coffin-bone. Fig. 2. a The sesamoid-bone. b The upper pastern, c The lower pastern. d The navicular bone. e The coffin-bone. decidedlyas the lower head of the shank-bone. Itslower head resembles that of the other pastern, and has also two prominences, somewhat resembling- a pulley, by which it articulates with the coffin-bone ; and a depression in front, corresponding with a projection in the coffin-bone. There are also two slight depressions behind, receiving eminences of the navicular bone. N"either of these joints admits of any lateral motion. The ligaments of this joint, both the capsular and the cross ones, are, like those of the pastern- joint, exceedingly strong. The tendon of the extensor muscle is inserted into the forepart both of the upper and lower pastern- bones, as well as into the upper part of the coffin-bone; and at the back of these bones the suspensory liga- ment is expanded and inserted, while a portion of it goes over the fore part of the upper pastern to reach the extensor tendon. These attachments in front of the bones are seen in the accompanying cut, in which a represents the lower part of the shank- bone ; ?) the sesamoid-bones ; c the upper pastern ; d the lower pastern ; and e the coffin-bone ; / one of the two branches of the suspensory ligaments going to unite with the extensor tendon ; g the long f extensor tendon ; li ligaments connecting the two ?^C" >^ pastern-bones together ; i the lateral cartilages of "^^^^^^-^ the foot, and h the coronary ligament. The length and obliquity of the pastern vary in the different breeds of horses, and on it depends the elastic action of the animal, and the easiness of his paces. The pastern must be long in proportion to its obliquity, or the fetlock will be too close to the ground, and, in rapid action, come vio- lently into contact Avith it. It is necessary that the fetlock should be elevated a certain distance from the ground, and this may be effected either by a short and upright, or a long and slanting pastern. In proportion as +,he pastern is oblique or slanting, two consequences will follow, less weight will be thrown on the pastern, and more on the sesamoid, and, in that proportion, concussion will be prevented. Every advantage, however, has, to a certain extent, its corresponding disadvantage. In proportion to the obliquity or slanting of the pasteim, will be the stress on the fetlock-joint, and, therefore, the liability of that THE FETLOCK. — GROGGINESS. 37b joint to injury and strain ; and also the liability to sprain of the back sinews from the increased action and play of the flexor tendons ; and likewise to injuries of the pastem-joints, for the ligaments will be weak in proportion to their length. The long and slanting pastern is advan- tageous in the race-horse, from the elasticity of action and greater extent of stride by which it is accompanied. A less degree of it is given in the hunter, who is to unite continuance of exertion with ease of pace. For the hackney there should be sufficient obliquity to give pleasantness of going, but not enough to endanger continuance and strength. Experience among horses will alone point out the most advantageous direction of the pastern for the purpose required ; but the slightest observation will show the necessity of considerable variety in the structure of this part. Let the reader imagine the heavy dray-horse with his short and upright pasterns contending in the race ; or the race-horse with his long and weak pasterns, endeavouring to dig his toe into the ground in order to move some heavy weight. The concussion which attends the common action of the cart-horse is little because his movements are slow, and therefore the upright and strong pastern is given to him, which he can force into the ground, and on which he can tlirow the whole of his immense weight. The oblique pastern is given to the race-horse because that alone is com- patible with extent of stride and great speed. Except a horse for general purposes, and particularly for riding is very hardly used, a little too much obliquity is a far less evil than a pastern too upright. While the jolting of the upright pastern is an insufferable nuisance to the rider, it is mjurious and most unsafe to the horse, and produces many diseases in the feet and legs, and particularly ringbone, ossification of the cartilages, and contracted feet. THE FETLOCK. The fetlock-joint is a very complicated one, and from the stress which is laid on it, and its being the principal seat of motion below the knee, it is particularly subject to injuiy. There are not many cases of sprain of the back sinew that are not accompanied by inflammation of the ligaments of this joint ; and numerous supposed cases of sprain higher up are simple affections of the fetlock. It requires a great deal of care, and some experience, to disting-uish the one from the other. The heat about the part, and the point at which the horse least endures the pressure of the finger, will be the principal guides. Occasionally, by the application of cooling lotions the inflammation may be subdued, but, at other times, the horse sufiers dreadfully, and is unable to stand. A serious affection of the fetlock-joint demands treatment more prompt and severe than that of the sheaths of the tendons. GEOGGINESS. The peculiar knuckling of the fetlock-joint, and the tottering of the whole of the fore-leg, known by the name of grogginess, and which is so often seen in old and over-worked horses, is seldom an affection of either the fetlock or the pastem-joints simply. Indeed it is not difficult to fix on the particular joint ; it is that which is deep in the foot, and where the flexor tendon runs over the navicular bone. When disease attacks these tissues, as the fearful number of cases of navicular disease proves to be so often the case, the horse, to avoid throwing a portion of his weight on the flexor tendon, which in a healthy state is sc well able to receive it, goes as much as possible on his toes, steps short and lightly, producing that appearance of unsteadiness to which the term is applied. It may be combined with a want of power in the ligaments of the joints generally, produced by am CUTTING. EINGBONE. frequent and severe sprains, or by ill-judged and cruel exertion. Professoi Stewart very truly says, in Lis ' Stable Economy,' that, 'it is common among all kinds of fast workers, and long journeys at a fast pace will make almost any horse groggy. Bad shoeing and want of stable care may help to increase, but never can alone produce grogginess. It is one of the evils of excessive work. In the majority of cases it admits of no remedy.' CUTTING. The inside of the fetlock is often bruised by the shoe or the hoof of the opposite foot. Many expedients used to be tried to remove this; the inside heel has been raised and lowered, and the outside raised and lowered ; and sometimes one operation has succeeded, and sometimes the contrary ; and there was no point so involved in obscurity, or so destitute of prin- ciples to guide the practitioner. The most successful remedy, and that which in the great majority of cases supersedes all others, is to put on a shoe, of equal thickness from heel to toe, and having but one nail, and that near the toe on the inside of the shoe ; care being taken that the shoe shall not extend beyond the edge of the crust, and that the crust shall be rasped a little at the quarters. There are some defects, however, in the natural form of the horse, which are the causes of cutting, and which no contrivance will remedy ; as when the legs are placed too near to each other, or when the feet are turned inward or outward. A horse with these defects should be carefully examined at the inside of the fetlock, and if there are any sore or callous places from cutting, there will be a good reason for not purchasing the animal. Some horses will cut only when they are fatigued or lame and old ; many colts will cut before they arrive at their full strength. SPRAIN OF THE COFFIN-JOINT. The proof of this is when the lameness is sudden, and the heat and tenderness are principally felt round the coronet. Bleeding at the toe, physic, fomentation, and blisters are the usual means adopted. This lameness is not easily removed, even by a bHster ; and if removed, like sprains of the fetlock and of the back sinews, it is apt to return, and finally produce a great deal of disorganisation and mischief in the foot. Sprain of the coffin-joint sometimes becomes a very serious affair. Not being always attended by any external swelhng, and being detected only by heat round the coronet, the seat of the lameness is often overlooked by the groom and the farrier ; and the disease is suffered to become confirmed before its nature is discovered. RINGBONE. Ringbone is a deposit of bony matter on one of the pasterns, and usually near the joint. From a disposition to spread, and at first around the pastern-joint, which is situated just above the coronet, the disease has acquired the name of ringbone. Horses with short upright joints, and with small feet and high action, are oftenest, as may be supposed, the subjects of this disease, which is the consequence either of concussion or sprain of the pastern-joints. It is also liereditary in its nature and may come on either with or without inflammation. It is more frequent in the hind limb than the fore : from the violent action of the hind legs in propelling the horse forward, the pasterns are more subject to ligamentary injuiy ; yet the lameness is not so great there, because the disease is confined ])rincipally to the ligaments, and the bones Lave not been injured by concussion : while, from the position of the fore THE HIXD LEGS. THE IIAGNCH. ^ 3H1 ILmbs, there will generally be in them injury of the bones to be added to that of the ligaments. In its early stage, and when recognised by a bony enlargement on both sides of the pastern-joint, or in some few cases on one side only, if the lameness is considerable, the animal should be kept at rest and antiphlogistic treatment adopted. The parts should be fomented with warm water and a dose of purgative medicine administered. When the acute inflammation has subsided, we apply counter- irritation, either in the shape of a blister (the biniodide of mercury and lard, in the proportion of a di'achm of the former to one ounce of the latter, being the best), or the actual cautery. When it comes on without lameness the latter ti-eatment may be adopted at once. But there is so much wear and tear in this part of the animal, that the inflammation and the disposition to the formation of bone rapidly spread. The pasterns tirst become connected together by bone instead of b'gament, and thence results what is called an anchylosed or fixed joint. CHAPTEPv XVII. THE HIND LEGS. THE HAUNCH. The haunch (see 0, p. 140 ; and the cut, p. 360) is composed of tkree bones. The first is the ilium, principally concerned in the formation of the haunch. Its extended branches behind tlie flanks are prominent in every horse. Wlien they are more than usually wide, the animal is said to be ragged-hipped. A branch runs up to the spine at the commencement of the sacral vertebraa, and here the haunch-bones are firmly united with the bones of the spine. The ischium, or hip-bone, is behind and below the ilium. Its tuberosities or prominences are seen under the tail (cut, p. 140). The pubis unites with the two former below and behind. These three bones are perfectly distinct in the fcstus, but in the horse become so intimately united as to constitute one solid bone. From the loins to the setting on of the tail a line should be carried on almost straight, or drooping only in a slight degree. Thus the haunch- bones will be most oblique, and will produce a corresponding obhquity, or slanting direction, in the thigh-bone — a direction in which, as stated when the fore legs were described, the muscles act with most advantage. This direction of the quarters is characteristic of the thorough -bred horse; and by the degree in which it is found, we judge to a considerable extent of the breeding of the animal. If the bones at D and E, p. 140, take a some- what arched form, as they do in the cart-horse, it is evident that the haunch-bone 0 would be more upi-ight. The thigh-bone P would like- wise be so. The stifle Q would not be so far under the body, and the power of the horse would be considerably impaired. The oblique direc- tion of the haunch and thigh-bones, produced by the straightness of the line of the spine, does not, as is commonly supposed, afibrd increased sur- face for the attachment of muscles, but places the muscles in a direction to act with great advantage. It is in the advantageous direction, quite as much as in the bulk of the muscle, that the strength of the horse consists. It will be seen, from the different cuts, that the angles formed by the fore and hind extremities have different directions. One points forward, 882 . THE THIGH. and the other backward. The action of the fore legs thus least interferes with the chest, and that of the hind legs with the belly. Width of haunch is a point of great consequence, for it evidently affords more room for the attachment of muscles ; and even though it should be so wide as to subject the horse to the charge of being ragged- hipped, and may somewhat offend the eye, it will not often be any detri- ment to action. If the loins are broad and the horse well ribbed home, the protuberances of the ilium can scarcely be too far apart. Many a ragged-hipped horse has possessed both fleetness and strength, while but few that were nan-ow across the haunch could boast of the latter quaHty. The opening in the centre of these bones, which constitutes the passage through which the young animal is expelled from the mother, is lai-ge in the mare, and in every quadi'uped, because there cannot, on account of tho form of the animal, be any danger of abortion from the weight of the foetus pressing on the part. The only portion of these bones exposed to injury or fracture are the tuberosities or prominences of the haunch. A fall or blow may chip off or disunite a portion of them, and, if so, there are no means of forcibly bringing the disunited parts together again, and retaining them in their natui'al position, the horse is then said to be down in the hip. The power of nature, however, will gi-adually unite them, but that union will always be attended by deformity and occasionally by lameness. A charge, or very strong adhesive plaster, across the haunch may be usefal, as helping, in some shght degree, to suppoi't the parts, and hold them together. THE THIGH. In the lower and lateral part of the hip-bones is a deep cavity or cup for the reception of the head of the thigh-bone. This, the true thigh-bone, is so concealed by thick muscles that its situation and shape are not visible to the eye. It is therefore frequently overlooked by horsemen, who call the next bone, extending from the stifle to the hock, the thigh. In this respect, it is analogous to the humerus or arm-bone of the f yre leg, which, as befoi'e mentioned, Hes as it were in the trunk, instead of being pendent from it. So here the thigh-bone forms a portion of the trunk itself ; the pendent portion commencing at the stifle, the joint analogous to the knee- joint in man. Although in the movement of the hind legs there cannot be the concussion to which the fore legs are exposed (for the weight of the body is seldom thrown violently upon them), yet in the powerful action of these hmbs there is much strain on the joints, and we shall, therefore, find that there are, in all of them, admirable provisions against injury. The head of the upper bone of the thigh is received into the deep cup mentioned above (the acetahulum), by which it is suiTOunded on every side; this consti- tutes the hip-joint, and dislocation from Avhich would seem almost impossible. But the bony cup may give way ? Not so, provision is made against this. All three of the haunch-bones unite in the formation of this cup, and the sutures by which they are held together are of such a nature, that generally speaking, no shock, or exertion, or accident, can disunite them. There is even something more in order to make the attachment doubly sure. In addition to the usual capsular and other hgaments, a singularly strong one rises from the base of the cup, and is inserted into the head of the thigh-bone, called the ligamentum teres or round Hgament, seeming as if it would render separation or dislocation altogether impossible. Such, however, is the great power of the muscles of the hind limbs, that, with all these attachments, sprain of the ligaments of the thigh, or the round hone, as horsemen call it, and dislocation and even fracture of it, are occa- RJonally found. THE STIFLE. 38a ■riie thigh-bone is both tho largest and strongest in the frame. It is short and thick, and exhibits singular prominences and roughnesses and hollows for the insertion of the immense muscles that belong to it. Four prominences, in particular, called by anatomists trochanters, two on the outside, one on the inside, and one near the head of the boue. This bone is commonly called the Bound Bone. It has, in some rare in- stances, been dislocated and fractm-ed. It is much oftener sprained, but not so frequently as the groom or farrier imagines. There is nothing pe- culiar in the lameness to detect injury of this part, except that the horse will drag his leg after him. Injury of the round bone will be principally discovered by heat and tendei'uess in the situation of the joint. A part so deeply situated is treated with difficulty. Fomentations ohould first be used to abate the inflammation, and, after that, an active blister should be applied. Strains of this joint are not always immediately reheved, and the muscles of the limb in some cases waste considerably : it therefore may be necessary to repeat the bUster, while absolute rest should accompany every stage of the treatment. It may even be requisite to fire the part, — or, as a last resort, a charge may be placed over the joint, and the horse turned out for two or three months. THE STIFLE. The inferior extremity of the femur presents a pulley-like articulatory surface in front, over which plays the patella, and two condyles, rounded and smooth, presenting inferiorly and posteriorly, and which are received into sHght depressions on the upper sui-face of the lower bone, the tibia ; while in front is a curious groove, over which plays a small irreg-ular bone, the patella, or stifle-bone. The whole is commonly called the stifle-joint. The patella (Q,p.l40) answers to the kneepan in the human subject. Some of the tendons of the strongest muscles of the upper bone of the thigh are inserted into it. This important joint is much strengthened by the proper ligaments between the upper and lower bones, and additional ligaments from the patella, forming altogether a very powerful union. The patella likewise answers another and even more important purpose. The tendons of some strong muscles are inserted into it. When these muscles are not in action, the patella Hes in the groove which nature has contrived for it ; but when they begin to contract, it starts from its partial hiding-place, becomes prominent from the joint, and alters the hne of direction in which the muscles act. It increases the angle, and thus very materially increases the power of the muscles. The lower bone of the thigh consists of two parts. The larger portion, in front, extending from the stifle to the hock, is called the tibia. The smaller bone, or fibula, behind (see R, p. 140), reaches not more than a third of the way down. It is united to the shank-bone, like the splint- bone, by a cartilaginous substance, which is soon changed into a bony one. Of the use of the smaller bone we cannot speak. The loAver bone of the thigh forms an angle with the upper one, being the reverse of that which exists between the upper bone and the pelvis. The object of this is twofold, — to obviate concussion, and to give a direction to the muscles favoui'able to their powerful action ; and in pro- portion to the acuteness of the angle, or the degree in which the stifle is brought under the horse, will these purposes be accompHshed. There is much diflference in this in different horses, and the construction of this part of the frame is a matter worthy of more regard than is generally paid to it. This part of the thigh should likewise be long. In proportion to the 384 DISLOCATION OP THE PATELLA. TIIOROUGH-PIN. length of the muscle is the degree of contraction of which it is capable ; and also in proportion to the contraction of the muscle is the extent of motion in the limb : but it is still more necessary that this part of the thigh should have considerable muscle, in order that strength may be added to such extent or compass of motion. Much endurance would not be expected from a horse with a thin arm. A horse with thin and lanky thighs will not possess the strength which considerable exertion would sometimes require. The principal muscles of this part of the thigh are usually somewhat prominent, and may readily be traced in the livin"- animal. SPRAIN OF THE STIFLE. The stifle-joint is occasionally subject to sprain from some violent exertion or sudden shp of the animfil. From its somewhat exposed position, it is also liable to injury, either from the kick of another horse, or from coming in contact with some hard substance. In these cases there will generally be sufficient heat, tenderness, and swelling in the part to point out the seat of injury. The animal will also step short on the affected hmb, being unable to extend it. The treatment should consist in resting the animal, applying warm fomentations to the part, and administering a dose of physic. If the inflammation runs very high it may be further reHeved by bleeding from the femoral vein. When the acute symptoms have sub- sided, a blister may be appHed to the part. DISLOCATION OF THE PATELLA. This is not a very uncommon disease, and may arise from several causes, such as a congenitally relaxed condition of the ligaments of the joints, and weak state of the muscles. It is sometimes caused by some inordinate force, such as muscular contraction, especially when the condyles over which the patella plays are not sufficiently developed. Cramp and sudden unconscious movements will also produce it, and it frequently follows de- bilitating diseases such as influenza, fever, &c. Toung well-bred animals are particularly subject to this affection. The symptoms are well marked and will not easily be mistaken. The animal is quite unable to move or extend the injured limb, and a carefal examination will generally detect an unnatural enlargement on the outside of the stifle-joint. The aid of the veterinaiy surgeon is here requisite ; stiU, however, an attempt should be made to reduce the dislocation as soon as it is discovered. A strap should be placed below the fetlock -joint, and the limb drawn forward by an assistant as far under the abdomen as possible ; the operator should then steadily press the patella in an inward, downward, and forward direction, when a moderate degree of force will generally replace it. The animal should then be tied up and not allowed to lie down for some time, and a blister apphed over the whole surface of the joint, or in bad cases, the actual cautery may be used. In young animals we sometimes get a kind of partial dislocation of the patella ; it slips partly off" the condyle, and when the animal moves a peculiar snapping sound is heard. This is a result of a relaxed condition of the ligaments of the joint and gen- erally disappears as the animal gets older, especially if the joint has been repeatedly bHstered. THOKOUGH-PIN. Mention has been made of wind-cjaUs and their treatment. A similar enlargement is found above the hock, between the tendons of the flexor of the foot and the extensor of the hock. As from its situation it generally projects on both sides of the hock, in the form of a round swelling, it THE HOCK. 385 is called a iliorougli-pin, a. It is an indication of considerable work, but is rarely attended by lameness. The mode of treatment must resemble that for wind-galls, but blistering or firing should be earUer had rcsoi-t to. THE HOCZ. This is a most important joint, occasionally the evident, and much offcener the unsuspected, seat of lameness, and the proper formation of which is essentially connected with the value of the horse. It answers to the ankle in the human being. The inferior head of 'the tibia is formed into two deep grooves, with three sharpened ridges, one separating the grooves, and the other two consti- tuting the sides of them. It is seen at a in the ac- companying cut. It rests upon a singularly- shaped bone, b, the astragalus, which has two circular risings or projections, and, with a depression between them, answering exactly to the irregularities of the tibia. At the posterior part, its convex surface is received into a concavity near the base of another bone, and with which it is united by very strong liga- ments. This bone, c, is called the os calcis, or bone of the heel, and it projects upwards, flattened at its sides, and receives, strongly implanted into it, the ten- dons of powerful muscles. These bones rest on two others, the os cnboides, d (cube-formed), behind, and the larger cuneiform or wedge-shaped bone, e, in front. The larger wedge- shaped bone is supported by two smaller ones, /, and these two smaller ones, and the cuboides, by the upper heads of the shank -bone, 7, and the splint-bones, h. The cuboides is placed on the external splint-bone, and the cannon-bone, or principal bone of the leg ; the small wedge-bone is principally resting on the inner splint-bone, not seen in the cut; and the middle wedge-bone on the shank-bone only, g. These bones are all connected together by very strong ligaments, which prevent dislocation, but allow a slight degree of motion between them, and the surfaces which arc opposed to each other are thickly covered by elastic cartilage. c c ^v- 386 ENLAKGEMENT OF THE HOCK. Considering the situation and action of this joint, the weight and stress thrown upon it must be exceedingly great, and it is necessarily liable to much injury in rapid and powerful motion. What are the provisions to prevent injury ? The grooved or pulley-like heads of the tibia and the astragalus, received deeply into one another, and confined by powerful ligaments, admitting freely of hinge-like action, but of no side motion, to which the joint would otherwise be exposed in rapid movement, or on an uneven surface. A shght inspection of the cut will show that the stress or weight thi-own by the tibia, a, on the astragalus, b, does not descend, perpendicularly, but in a slanting direction. By this, much concussion is avoided, or more readily difiused among the different bones ; and, the joint consisting of six bones, each of them covered with elastic cartilage, and each admitting of a certain degree of motion, the diminished concussion is diffused among them all, and thereby neutralised and rendered compara- tively harmless. Each of these bones is covered not only by cartilage, but by a membrane secreting synovia; so that, in fact, these bones are formed into so many distinct joints, separated from each other, and thereby guarded from injury, yet united by various ligaments — possessing altogether sufficient motion, yet bound together so strongly as to defy dislocation. When, however, the work which this joint has to perform, and the thoughtlessness and cruelty with which that work is often exacted, are considered, it will not excite any surprise if this necessarily complicated mechanism is sometimes deranged. The hock, from its complicated struc- ture and its work, is the principal seat of lameness behind. ENLARGEMENT OE THE HOCK. First, there is inflammation arising from injury, such as kicks or blows, or spram of the hock-joint generallij, arising from sudden violent concussion, by some check at speed, or overweight, and attended with enlargement of the whole joint, and great tenderness and lameness. This, however, like other diffused inflammations, is not so untractable as an intense one of a more circumscribed nature, and by rest and fomentation, local bleeding and physic, followed by coanter-irritation, the limb recovers its action, and the horse becomes fit for ordinary work. When it is the result of external violence, especially, as is frequently the case, from being kicked by another animal, inflammation often runs very high, the hock being much swollen and great pain and lameness present. This may go on increasing in violence for several days, and sometimes extends to the ijiterior of the joint, and terminates in the joint becoming open, or the pain and lameness gi'adually decrease. The swelling, however, does not always subside, and enlargement spread over the whole of the hock-joint sometimes remains. The treatment should consist in keeping the animal perfectly at rest, and the continued apphcation of fomentations of warm water for two or three hours at a time. A dose of physic should be given, and blood may be abstracted from the femoral vein. If the inflammation extend to the interior of the joint and it becomes open, no treatment will do much good, as the excessive irritation will often destroy the animal. If, however, when the violence of the symptoms have abated, considerable enlargement of the hock remains, it should be repeatedly blistered. A horse with an enlarged tiock must always be regarded -with suspicion. In truth, he is unsound. The parts, altered in structure, must be to a certain degree weakened. The animal may discharge his usual work during a long period, without return of lameness ; but if one of those emergencies should occur when all his energies require to be exerted, the disorganised and weakened part will fail. The purchase, therefore, of a horse "with enlarged hock will depend CURB. 387 on circumstances. If lie has other excellences, he will not be uniformly rejected ; for he may be ridden or driven moderately for many a year without inconvenience, yet one extra hard day's work may lame him for ever, CUKB. There are often injuries of particular parts of the hock-joint. Cttrb is an affection of this kind. It is an enlargement at the back of the hock, three or four inches below its point. It is either a strain of the ring-like ligament which binds the tendons in their place, or of the sheath of the tendons ; oftener, however, of the ligament than of the sheath. Any sudden action of the limb of more than usual violence may produce it, and therefore horses are found to ' throw out curbs ' after a hardly contested race, an extraordinary leap, a severe gallop over heavy ground, or a sudden check in the gallop. Yormg horses are particularly liable to it, and horses that are cow-hocked — whose hocks and legs resemble those of the cow, the hocks being turned inward, and the legs forming a considerable angle outwards. This is intelligible enough ; for in hocks so formed, the annular Hgament must be continually on the stretch, in order to confine the tendon. Curbs are generally accompanied by considerable lameness at their first appearance, but the swelHug is not always great. They are best detected hy observing the leg sideway. The first object in attempting the cure is to abate iaflammation, and this will be most readily accompHshed by cold evaporating lotions frequently appHed to the part. Equal portions of spii-it of wine, water, and vinegar, \vill afford an excellent application. It wiU be almost impossible to keep a bandage on. If the heat and lameness are considerable, it will be prudent to give a dose of physic ; and whether the injury is of the annular ligament, or the sheath of the tendon, more active means will be necessary to perfect the cure. The heels of the shoe should for a time be raised ; by this means part of the stress on these parts will be removed. Either a liquid bHster should be rubbed on the part, consisting of vinegar of cantharides, and this daily applied until some considerable swelling takes place ; or, what is the preferable plan, the hair should be cut off, and the part bhstered with biniodide of mercury as soon as the heat has been subdued. The blister should be repeated until the swelHng has disappeared, and the horse goes sound. In severe cases it will be necessary to fire ; but although a fair trial should be given to milder measures, this will generally eflect the most permanent cure. There are few lamenesses in which absolute and long-continued rest is more requisite. It leaves the parts materially weakened, and if the horse is soon put to work again, the lameness will frequently return. No horse that has had curbs should be put even to ordinary work in less than a month after the apparent cure, and, even then, he should very gradually resume his former habits. A horse with a curb is manifestly unsound. A horse with the vestige of curb should be regarded with much suspicion, or generally condemned as unsound. Some judgment, however, is required to authorise a decided opinion, for hocks, in every other respect unexceptionable, will occa- sionally be disfigured by slight curbs, and yet they are equal to their work and the horse remains sound for hfe ; but where the hocks are not other- wise well formed, the case is very different — when they are round, fleshy, full, and curved, instead of straight, clean, and thin, when, in short, they present that imperfect development which every horseman recognises by c c 2 308 BOG SPAVIN. BONE SPAVIN. the term ' curby,' they tend more to render a hor&e worthless than almosl any other defect to which he is liable. Curb ig also an hereditary complaint, and therefore a horse that haa once suffered from it should always be regarded with suspicion, especially if either of the parents has exhibited it. BOG SPAVIN. The hock is plentifully famished with reservoirs of synovia to lubricate the different portions of this compHcated joint. Some of these are found on the inside of the joint. From over-exertion of the joint they become inflamed, and considerably enlarged. They are wind-galls of the hock. The femoral vein passes over the inside of the hock, over some of these enlarged synovial reservoirs, and is compressed between them and the external integument — the course of the blood is partially arrested, and a portion of the vein below the impediment, and between it and the next valve, is distended, and causes the soft tumour on the inside of the hock, called Blood Spavin. Bog spavin is a very troublesome disease, attended with no great, but often permanent lameness, and too apt to return when the enlargement has subsided under medical treatment. It must be considered as decided unsoundness. In a horse for slow draught it is scarcely worth while even to attack it. And in one destined to more rapid action, the probabihty of a relapse should not be forgotten, when the chances of success and the expenses of treatment are calculated. The cause of the disease— the enlarged synovial capsule — lies deep, and is with difficulty operated upon. Uniform pressure would sometimes cause the absorption of the fluid contained in cysts or bags like these, but in a joint of such extensive motion as the hock, it is difficult, or almost impossible, to confine the pressure on the precise spot at which it is required. Could it be made to bear on the enlarged bag, it would likewise press on the vein, and to a greater degree hinder the passage of the blood, and increase the dilatation below the obstruction. The old and absurd method of passing a ligature above and below the enlarged portion of the vein, and then dissecting it out, is not in the advanced stage of veterinary science practised by any surgeon who regards his reputation; it being merely the consequence, not the cause, of the disease. The only method of relief wliich holds out any promise even of temporary success, is exciting considerable inflammation on the skin, and thus rousing the deeper-seated absorbents to carry away the fluid effused in the enlarged bag. For this purpose, blisters or firing may be tried ; but in the majority of cases the disease will bid defiance to all appKances, or will return and baffle our hopes when we had seemed to be accompUsh- ing our object. A horse with bog spavin will do for ordinary work. He may draw in a cart, or trot fairly in a lighter carriage, with little detriment to his utility ; but he will never do for hard or rapid work. BONE SPAVIN. A still more formidable disease ranks under the name of Spavin, and is an affection of the bones of the hock-joint. It has been stated that the bcnes of the leg, the shank-bone, g, page 385, and the two small splint- bones behind, h, support the lower layer of the bones of the hock. The cube-bone, d, rests principally on the shank-bone, and in a sUght degree on the outer splint-bone. The middle wedge-bone,/, rests entirely upon thp ehaiik-bone, and the smaller wedge-bone (not seen in the cut) presses BONE SPAVIN. 3Sy m a very slight degree on the shank-bone, but principallj or almost entirely on the inner splint-bone. Then the splint-bones sustain a very unequal degree of concussion and weight. Not only is the inner one placed more under the body and nearer the centre of gravity, but it has almost the whole of the weight and concussion communicated to the smaller cuneiform bone carried on to it. It is not, therefore, to be won- dered at, that in the violent action of this joint in galloping, leaping, hea\'y draught, and especially in young horses, and before the limbs have become properly knit, the inner splint-bone or its ligaments, or the substance which connects it with the shank-bone, should suffer material iiijury. The smith increases the tendency to this by his injudicious management of the feet. It is a common notion that cutting, and wounds in the feet — from one foot treading on the other — are prevented by putting on a shoe with a calkin on the outer heel, that is, the extremity of the heel being considerably raised from the ground. It is not unusual to see whole teams of horses with the outer heel of the hind foot considerably raised above the other. This unequal bearing, or distribution of the weight, cannot fail of being injui-ious. It places an unequal strain on the ligaments of the joints, and particularly of the hock-joint, and increases the tendency to spavin. It, should, therefore, be considered as an axiom, that whenever it is necessary, in order to give the animal a firmer hold or footing — to turn up or caulk the outside heel of the shoe, the inside should invariably be thickened to an equal extent. The weight and concussion thus thrown on the inner splint-bone pro- duce inflammation of the cartilaginous substance that unites it to the shank-bone. In consequence of it, the cartilage is absorbed, and bone deposited ; the union between the spHnt-bone and the shank becomes bony, instead of cartilaginous ; the degree of elastic action between them is destroyed, and there is formed a splint of the hind leg. This is uni- formly on the inside of the hind leg, because the greatest weight and concussion are tkrown on the inner spHnt-bones. As in the fore leg, the disposition to form bony matter having commenced, and the cause which produced it continuing to act, bone continues to be deposited, and it generally appears in the form of a tumour, where the head of the sphnt-bone is united with the shank, and in the front of that union. This is called Bone Spavin, Inflammation of the Hgaments of any of the small bones of the hock, proceeding to bony tumour, woiild equally class under the name of spa\Tn ; but, commonly, the disease commences on the precise spot that has been described. Spavins, especially when the result of hereditary predisposition, wiU sometimes be found of considerable size without either pain or lameness being present during their formation. But when the result of inflamma- tory action caused by concussion or other injury, lameness vdll nearly always be present. "VVTien the membrane of the bone has accommodated itself to the tumour that extended it, the lameness subsides or disappears, or depends upon the degree in which the bony deposit interferes with the motion of the joint. It is well known to horsemen, that many a hunter, with spa\nn that would cause his rejection by a veterinary surgeon, stands his work without lameness. The explanation is this ; there is no reason why an old bony tumour on the outside of any of the bones of the hock, free from connection with the next bone, and from any tendon, should be at all injurious ; as, for instance, one immediately under e or/, p. 385, but from the compHcated nature of the hock, it is diSicult, if not impossible, to be quite sure of the place or extent, from inspection of the tumour ; and, besides, the disposition to throw out bone beneath the tumour may 390 BONE SPAVIN. continue and extend to the joint. The surgeon, therefore, cannot be per- fectly safe in pronouncing a bone spavin to be of no consequence. Horses with exceedingly large spavins are often seen that are only slightly lame, or that merely have a stiffness in their gait at first starting, but which gradually goes off" after a little motion ; while others, with the bony tumour comparatively small, have the lameness so great as to destroy the usefulness of the horse. There is always this pecuharity in the lameness of spavin, that it abates, and sometimes disappears, on exercise ; and there- fore, a horse with regard to which there is any suspicion of this affection should be examined when first in the morning it is taken from the stable. If the spavin continues to increase, the bony deposit first spreads over the lower wedge-bones, /, page 385, for these are nearest to its original seat. They are capable of slight motion, and share in every action of the joint, but their principal design is to obviate concussion. The chief motion of the joint, and that compared with which the motion of the other bones is scarcely to be regarded, is confined to the tibia, a, and the astra- galus, h, and therefore stiffness rather than lameness may accompaiiy spavin, even when it is beginning to affect the small bones of the joint. Hence too is the advantage of these bones having each its separate liga- ments and membranes, and constituting so many distinct joints, since injury may happen to some of them, without the effect being propagated to the rest. When the bony deposit continues to enlarge, and takes in the second layer of bones — the larger wedge-bones, e — and even spreads- to the cuboid bones on the other side, the lameness may not be very great, because these are joints, or parts of the joints, in which the motion is small ; but when it extends to the union of the tibia, a, and the astragalus, b — when the joint, in which is the chief motion of the hock, is attacked — the lameness is indeed formidable, and the horse becomes nearly or quite useless. Young horses are more subject to spavin than old ones, and although the chief active agent in their production may be traced to concussion or sprain, there cannot be a doubt but that in many instances, like curb, there is an hereditary predisposition inherited from the parents of the animal,, which requires but some very slight cause to hasten its formation. We cannot too clearly impress upon all breeders of horses the great impor- tance of gi^ing attention to this well-established fact ; and inducing them to select only those animals to breed from that are free from those diseases, Buch as spavin, ringbone, curb, roaring, &c. &c., which vrill assuredly sooner or later develope themselves in their produce. The symptoms by which we may detect spavin in its early stages, when no bony enlargement can be felt, are somewhat obscure. There are, however, some peculiarities in the action of the animal that will assist us. When first brought out he goes stifHy and does not flex the hmb properly, only getting his toe to the ground, Avhich ■will be more evident when turning a comer ; after a little exercise the stiffness •v\ill generally dis- appear. If, however, ulcerative disease be going on, the lameness "will increase with motion. The horse frequently rests the affected limb in the stable, and when made to move from one side to the other will generally give evidence of lameness. The history of the case, and absence of any other source of lameness, will also materially assist hi pointing out the Beat of disease. Spavined horses are generally capable of slow work. They are equal to the greater part of the work of the farm, and therefore they should not be always rejected by the small farmer, as they may generally be procured at little piice. These horses are not only capable of agricultuv&3 BONE SrAVIX. 391 work, but tliey generally improve under it. The lameness in some degree abates, and even the bony tumour to a certain degree diminishes. There is sufficient moderate motion and friction of the limb to rouse the absor- bents to action, and cause them to take up a portion of the bony matter tlirown out, but not enough to renew or prolong inflammation. It cannot be said that the plough affords a cxhre for spa^"in, but the spavined horse often materially improves while working at it. For fast work, and for work that must be regularly performed, spavined horses are not well calculated ; for this lameness behind produces great difficulty in rising, and the consciousness that he will not be able to rise without painful effort occasionally prevents the horse from lying doAvn at all ; and the animal that cannot rest well cannot long travel far or fast. The treatment of spavin is simple enough, but far from being always eflfectual. The owner of the horse will neither consult his own interest, nor the dictates of humanity, if he suffers the chisel and mallet, or the gimlet, or arsenic, to be used. When acute inflammation is present we must endeavour to abate it by antiphlogistic measures. The animal should be kept at rest, a high- heeled shoe placed on the foot, and the hock frequently fomented with warm water. A dose of physic should be given, and the animal kept on soft diet. In extreme cases, blood may be abstracted from the femoral vein. VThen the acute inflammation has subsided, or when we meet with it in a chronic form, measures of considerable severity miist be resorted to. Re- peated blisters will usually cause either the absorption of the bony deposit, or the abatement or removal of the inflammation of the ligaments. Setona also are at present a veiy favourite remedy: two of them inserted per. pendicularly the whole depth of the joint, and their action kept up for three weeks or a month, often prove efficacious ; or, as a last resource, the heated iron must be applied. The account of the diseases of the hock is not yet completed. It is well known that the horse is frequently subject to lameness behind, when no ostensible cause for it can be found, and there is no external heat or enlargement to indicate its seat. Famers and gi'ooms pronounce these to be aflections of the stifle, or round bone ; or, if the gait of the horse and peculiar stiGfness of motion point out the hock as the affected part, vet the joint may be of its natural size, and neither heat nor tenderness can be discovered, the gToom has his 0"mi method of unravelling the mvstery. He says that it is the beginning of spavin ; but months and years pass away, and the spavin does not appear, and the horse is at length destroyed as incurably lame. Horsemen are indebted to ]\Ir. W. J. Goodwiu, late Veterinary Surgeon to Her Majesty, for the discovery of the seat of frequent lameness behind. The cut, p. 385, represents the two layers of small bones within the hocic — the larger wedge-like bone, e, above ; and the middle,/, and the smaller one below ; and it will be seen that almost the whole of the weight of the horse, communicated by the tibia, rt, is thrown upon these bones. The cube-bone, c?, does little more than support the point of the os calcis, c. It is then easy to imagine that, in the concussion of hard work or rapid travel- ing, these bones, or the deUcate and sensible membrane in which they are wrapped, may be severely injured. Repeated dissections of horses that have been incurably lame behind, T^nthout any external indication, during life, to point out the place or cause of lameness, have shown that inflam- mation of the membranes lining these joints, and secreting the fluid that lubricates them, has taken place. Mr. Goodwin narrates a very interesting case in corroboration of this account of hock lameness. The author of this work had the honour of 392 CAPPED HOCK. THE HIND LEG. being present when the examination took place. ' The patient was a harness horse of unusual perfection, both in shape and action, and was a great favourite with a late illustrious personage. He suddenly became lame behind on the off-leg, but without the least accident or alteration of structure to account for it. He was turned out for a short time, and the lameness disappeared. He was then incautiously made to perform his usual work, ujitil perfectly incapacitated for it by returning and aggra- vated lameness. Suspecting the seat of lameness to be in the hock, although the joint was perfectly unaltered in form, he was, three months after the commencement of the lameness, bhstered and fired, and placed either in a loose place or paddock, as circumstances seemed to require. Not the least amendment took place at the end of six months, even in his quiescent state, and, after twelve months from the time of his being given up for treatment, he was destroyed, his case being naturally considered a hopeless one. Ulceration of the synovial membrane was found, taking its origin between the two cuneiform bones. These bones had become carious, and the disease had gradually extended itself to other parts of the joint. Mr. Goodwin had no doubt that if the animal had been sufiered to work on for any greater length of time, necrosis, or anchylosis of every bone concerned in the hock, would have been the result.' These opinions of the seat and nature of obscure hock-lameness are now maintained by the majority of veterinary surgeons, although some of them differ a Httle with regard to the articulation that is generally affected, and the manner in which the depressions or excavations on the surface of these bones is effected. CAPPED HOCK. The point of the hock is sometimes swelled. A soft fluctuating tumour appears on it. It is seldom accompanied by lameness, and yet it is a somewhat serious business, for it is usually produced by blows, and mostly by the injuries which the horse inflicts upon himself in the act of kicking : therefore it is that a horse with a capped hock is very properly regarded with a suspicious eye. The whole of the hock should be carefully examined, in order to discover whether there are other marks of violence, and the previous history of the animal should be carefully enquired into. Does he kick in harness or in the staE, or has he been lying on a thin bed, or on no bed at all ; and thus may the hock have been bruised, and the swelling produced ? It is exceedingly difficult to apply a bandage over a capped hock ; and puncturing the tumour, or passing a seton through it, would be a most injudicious practice. Bhsters, or iodine, repeated as often as may be necessary, are the best means to be employed. Occasionally the tumour will spontaneously disappear ; but at other times it will attain a large size, or assume a callous structure, that will bid defiance to all the means that can be employed. THE HIND LEG. The line of direction of the legs beneath the hocks should not be disregarded. The leg should descend perpendicularly to the fetlock. The weio-ht and stress will thus be equally diffused, not only over the whole of the hock, but also the pasterns and the foot. Some horses have their hocks closer than usual to each other. The legs take a divergent direction out- ward, and the toes also are turned outward. These horses are said to be Cat or Coiv-hoched. They are generally supposed to possess considerable fipeed. Perhaps they do so ; and it is thus accounted for The cow-hocked SWELLED LEGS. 393 horse has his legs not only turned more outward, but bent more under him, and this increases the distance between the point of the hock and the tendons of the perforating muscle. It increases the space which is usually occupied by the thorough-pin. Then the point of the hock, moved by the action of the muscles, is enabled to describe a greater portion of a cii-clu ; and in proportion to the increased space passed over by the point of the hock, AviU the space traversed by the limb be increased, and so the stride of the horse may be lengthened, and, thus far, his speed may be increased. But this advantage is more than counterbalanced by many evils. This increased contraction of the muscles is an expenditui-e of animal power ; and, as already stated, the weight and the concussion being so unequally distributed by this formation of the hmbs, some part must be ovei'strained and over-worked, and injury must ensue. On this account it is that the cow-hocked horse is more subject than others to thorough-pin and spa\'in ; and is so disposed to curbs, that these hocks are denominated by horsemen curhy hocks. The mischief extends even farther than this. Such a horse is pecuHarly hable to wond-gall, sprain of the fetlock, cutting, and knuckling. A slight inclination to this form in a strong powerful horse may not be very objectionable, but a horse decidedly cow-hocked should never be selected. SWELLED LEGS. The fore legs, but oftener the hind ones, and especially in coarse horses, are sometimes subject to considerable enlargement. Occasionally, when the horse does not seem to labour ujider any other disease, and sometimes from an apparent shifting of disease from other parts, the hinri legs suddenly swell to an enormous degree from the hock and ahnost from tht stifle to the fetlock, attended by a greater or less degree of heat, and tenderness of the skin, and sometimes excessive and very peculiar lameness. The puise likewise becomes quick and hard, and the horse evidently labours under considerable fever. It is acute inflammation of the cellulai' substance of the legs, and that most sudden in its attack, and most violent in its degree, and therefore attended by the effiision of a considerable quantity of fluid into the cellular membrane. It occurs in young horses, especially those used for agi*icultural purposes, and in those which are over-fed and httle exercised. Fomentation, diuretics, or purgatives, or, if there is much fever, a moderate bleeding from the foot, wtH often relieve the distension ahnost as suddenly as it appeared. The kind of swelled legs most frequently occurring and most troublesome is of a difierent nature, or rather it is most various in its kind and causes, and consequences and mode of treatment. Sometimes the legs are filled, but there is little lameness or inconvenience. At other times the limbs are considerably gorged, and with a great degi-ee of stiffness and pain. Occasionally the horse is apparently well at night, but, on the follo^\ing morning, one or both of the legs are tremendously swollen ; and on its being touched, the horse catches it up suddenly, and nearly falls as he does so. In these cases, fomentations ■\\-ith flannels dipped and wyung out of hot water, for twenty minutes, or half an hour, wiU afibrd considerable relief, and after each fomentation some mild stimulating liniment, with the addition of a Httle tincture of opium, will prove beneficial. Many horses, in seemingly perfect health, if stLffered to remain several days without exercise, will have swelled legs. K the case is neglected, ab- scesses appear in various parts of the legs ; the heels are attacked by grease, and, if proper measures are not adopted, the horse has an enlarged leg for life. 394 SWELLED LEGS. The cure, when the case has not been too long neglected, is sufficiently plain. Physic or diuretics, or both, must be had recourse to. Mild case? will generally yield to their influence ; but, if the animal has been neglected, the treatment must be decisive. If the horse is in high condition thesti should be preceded or accompanied by bleeding ; but if there are any symptoms of debility, bleeding would only increase the want of tone in the vessels. Not unfrequently the cause of this complaint is a want of tone in the absorbents, their action is sluggish and inert, the quantity of fluid secreted is merely the usual one, but its removal is not in due proportion ; in these cases, indicated by the absence of pain or tenderness, the combi- nation of half a tonic and half a diuretic ball, given night and morning, will effect an equaHsed action of the exhalant and absorbent vessels. In all cases of enlarged leg, whether from undue action of the exhalant vessels or defective action of the absorbents, on examining the inside of the thigh, close up to the groin, the femoral vein will be found hard and distended, or the cluster of absorbent vessels around will be rigid and engorged ; the one or the other evidently overloaded and unable freely to forward their contents. The application of a stimulus to this particular part ^vill have a remarkably good effect. A teaspoonfal of the tincture or infusion of cantharides, carefully and gradually rubbed over a space of two inches, vrill rouse the action of the vessels and give immediate relief. Horses taken from grass and brought into close stables very speedily have swelled legs, because the difference of food and increase of nutriment rapidly increase the quantity of the circulating fluid, while the want of exercise takes away the means by which it might be got rid of. The remedy here is sufficiently plain. Swelled legs, however, may proceed from general debility. They may be the consequence of starvation, or disease that has considerably weakened the animal ; and these parts, being farthest from the centre of circulation, are the first to show the loss of power by the accumulation of fluid in them. Here the means of cure would be to increase the general strength, with which the exti-emities would sympathise. Mild diuretics and tonics would therefore be evidently indicated. Horses in the spring and fall are subject to swelled legs. The powers of the constitution are principally employed in providing a new coat for the animal, and the extremities have not their share of vital influence. Mingled cordials and diuretics are indicated here — the diuretic to lessen the quantity of the cu-culating fluid, and the cordial to invigorate the frame. Swelled legs are often teasing, in horses that are in tolerable or good health : but where the work is somewhat irregular the cure consists in giving more equable exercise, walking the horse out daily when the usual work is not required, and using plenty of friction in the form of hand- rubbing. Bandages have a greater and more durable effect, for nothing tends more to support the capillary vessels, and rouse the action of the absorbents, than moderate pressure. Haybands will form a good bandage for the agricultural horse, and their effect will proba'bly be increased by pi-eviously dipping them in water. A loose box is an invaluable adjunct in the treatment of these cases. THE FOOT. »93 CHAPTER XVIIi. THE FOOT. A The extornal crust seen at the quarter. B The coronary ring. c The little horny plates lining the crust. D The same continued over the bars. E E The two concave surfaces of the inside of the horny frog. F That which externally is the cleft of the frog. G The bars. H The rounded part of the heels, belonging to the frog. This smaller cut exhibits, in as satisfactoiy a manner, the mechanism and structure of the base of the foot. a a The frog. h The sole, e c The bars. d d The crust. The foot is composed of the horny box that covers the extremities of the horse, and the contents of that box. The hoof or box is composed of the crust or wall, the coronary ring and band, the bai's, the horny laminae, the sole, and the horny frog. THE CRUST OR "WALL OF THE HOOP. The crust or vail is that portion which is seen when the foot is placed on the ground, and reaches from the termination of the hair to the ground. It is deepest in front, where it is called the toe, measuring there about three inches and a half in depth, shallower at the sides, which are de- nominated the quarters, and of least extent behind, where it is seldom more than an inch and a half in height, and is termed the heel. The crust 'in the healthy foot presents a flat and narrow surface to the ground, ascending obliquely backwards, and possessing different degrees of obli- quity in different horses. In a sound hoof the proper degree of obliquity is calculated at forty-five degrees, or the fourth part of a semicircle, at the front of the foot. When the obliquity is greater than this, it indicates undue flatness of the sole, and the crust is said to have ' fallen in.' If the obliquity is very much increased the sole projects, and is said to be pumiced or convex. If the foot is more upright, or forms a greater angle than forty-five degrees, it indicates much contraction, and a sole too concave ; and this «*6 THE CKUST OR WALL OF THE HOOF. difference of obliquity is often so great, that the convexity or conca\-ity of the sole may be affirmed without the trouble of raising the foot for the purpose of examination. It is of some importance to observe whether the depth of the crusi appears rapidly or slowly to decrease from the front to the heel. If the decrease is little, and even at the heel the crust is high and deep, this indicates a foot liable to contraction, sand-crack, thrush, and inflammation. The pasterns are upright, the paces of that horse are not pleasant. On the other hand, if the crust rapidly diminishes in depth, and the heels arc low, this is accompanied by too great slanting of the pastern, and disposi- tion to sprain in the back sinew. The foot, generally, is liable to be weak and flat, and bruised, and there is more tendency to the frequent, but obscure lameness, of which there will presently be occasion to treat — the navicular-joint disease. The crust is composed of numerous horny fibres, connected together by an elastic adhesive substance, and extending from the coronet to the base of the hoof. Perhaps as good an idea of its structure as can be obtained, is, supposing it to consist of a number of hairs or bristles connected together by a strong glue. It differs materially in its texture, its elasticity, its growth, and its occasional fragility, according to the state in which it is kept, and the circumstances that are acting upon it. The exterior wall of the hoof should be smooth and level. Protu- berances or rings round the crust indicate that the horse has had inflam- mation in the feet, and that to such a degree as to produce an unequal growth of horn, and probably to leave some injurious consequences in the intemal part of the foot. If there is a depression or hollow in the front of the foot, it betrays a sinking of the coffin-bone, and a flat or pumiced sole. If there is a hollow at the quarters, it is the worst symptom of bad contraction. The thickness of the crust, in the front of the foot, is rather more than half an inch ; it becomes gradually thinner towards the quarters and heels, but this often varies to a considerable extent. In some hoofs, it is not more than half the above thickness. If however there is not, in the majority of horses, more than half an inch for nail-hold at the toe, and not so much at the quarters, it Will not appear surprising that these horses are occasionally wounded in shoeing, and especially as some of them are very unmanageable wliile undergoing this process. While the crust becomes thinner towards both quarters, it is more so at the inner quarter than at the outer, because more weight is thrown upon it than upon the outer. It is more ujider the horse. It is under the inner eplint-bone, on which so much more of the weight rests than on the outur ; and, being thinner, it is able to expand more. Its elasticity is called more into play, and concussion and injury are avoided. ^Vhen the expansion of the quarters is prevented by their being nailed to an unbending shoe, the inner quarter suffers most. Corns are oftenest found there ; contraction begins there ; sand-crack is seated there. Nature meant that this should be the most yielding part, in order to obviate concussion, because on it the weight is principally tlirown, and therefore when its power of yielding is taken away it must be the first to suffer. A careful observer will likewise perceive that the inner quarter is higher than the outer. WhUe it is thin to yield to the shock, its increased surface gives it sufficient strength. On account of its thinness, and the additional weight which it bears, the inner heel wears away quicker than the outer ; a circumstance that should never be forgotten by the smith. His object is to give a plane and level bearing to the whole of the crust. To accompHsh this, it will be THE CORONARY RING. THE BARS. 397 often scarcely necessary to remove anything from the inner heel, for this has already been done by the wear of the foot. If he forgets this, as he too often seems to do, and cuts away with his knife or his buttress an equal portion all round, he leaves the inner and weaker quarter lower than the outer; he throws an uneven bearing upon it; and produces corns an.d sand-cracks and splints, wliich a little care and common sense might have avoided. THE CORONARY RING. The crust does not vary much in thickness (see A, page 395, and b, ii) the accompanying cut), until near the top, at the coronet, or union of th© horn of the foot with the skin of the pasterns, where it _ rapidly gets thin. It is in a manner scooped and hollowed out. It likewise changes its colour and consistence, and seems almost like a continuation of the skin, but easily separable from it by maceration or disease. This thin part is called the coronary ring. It extends round the upper portion of the hoofs, and receives, within it, or covers, a thickened and bulbous prolongation of the skin, called the coronary Ugame7it (see b, in the accompanying cut) This prolongation of the skin — it is nothing more — is thickly supplied with blood-vessels. It is almost a mesh of blood-vessels connected together by fibrous texture, and many of them are employed in secreting or forming the crust or wall of the foot. Nature has enabled the sensitive laminse of the coffin-bone, c, which will be presently described, to secrete a certain quantity of horn, in order to afford an immediate defence for itself when the crust is wounded or taken away. Of this there is proof when in sand-crack or quittor it is necessary to remove a portion of the crust. A pellicle of horn, or of firm hard substance resembling it, soon covers the wound ; but the crust is principally formed from this coronary ligament. Hence it is, that in sand-crack, quittor, and other diseases in which strips of the crust are destroyed, it is so long in being renewed, or grotving down. It must proceed from the coronary lio-ament and so gradually creep down the foot with the natural growth or leno-then- ing of the horn, of which, as in the human nail, a supply is slowly given to answer to the wear and tear of the part. Below the coronary ligament is a tliin strip of horny matter, wlaich has been traced to the frog, and has been supposed by some to be connected with the support or action of that body, but which is evidently intended to add to the security of the part on which it is found, and to bind together those various substances which are collected at the coronet. It resembles more than anything else, the strip of skin that surrounds the root of the human nail, and which is placed there to strengthen the union of the nail with the substance from which it proceeds. THE BARS. At the back part of the foot the wall of the hoof, instead of continuing round and forming a circle, is suddenly bent in at each heel on itself as in the small cut, in page 395, where d represents the base of the crust, and e its inflection or bending at the heel. The bars are, in fact, a continuation of the crust, forming an acute angle, and meeting at a point at the toe of the frog — see a, b, and c, in the smaller cuts — and the inside of the bars, like the inside of the crust — see the first and larger cut — presents a continuance of the horny leaves, showing that it is a part of the same substance, and helping to discharge the same office. It needs only the slightest consideration of the cut, or of the naturni 898 THE HORXY LAMINJ^^. THE SOLE. hoof, to show the importance of the bars. The arch which these form od either side between the frog and the quarters, is admirably contnved both to admit of and to hmit to its proper extent the expansion of the foot. When the foot is placed on the ground, and the weight of the animal ia thrown on the leaves of which mention has just been made, these arches will shorten and widen, in order to admit of the expansion of the quarters — the bow returning to its natural curve, and powerfiilly assisting the foot in regaining its usual form. It can also be conceived that these bars must form a powerful protection against tlie contraction, or wiring m, of the quarters. A moment's inspection of the cut (see g, page 395) will show that, if the bars are taken awaj, there will be nothing to resist the contraction or falling in of the quarters when the foot is exposed to any disease or bad management that would induce it to contract. One moment's observation of them will also render evident the security which chey afford to the frog (/), and the effectual protection which they give to the lateral portions of the foot. Then appears the necessity of passing Hghtly over them, and leaving prominent, when the foot is pared for shoeing, that which so many smiths cut perfectly away. They imagine that it gives a more open appearance to the foot of the horse. Horses shod for the purpose of sale have usually the bars removed with this view ; and the smiths in the neighbourhood of the metropolis and large towns, shoeing for dealers, too often habit- ually pursue, with regard to all their customers, the injurious practice of removing the bars. The homy frog, deprived of its guard, will speedily contract, and become elevated and thrushy ; and the whole of the heel, having lost the power of resilience or reaction which the curve between the bar c and the crust d gave it {vide p. 395, cut), will speedily fall in. THE HOENY LAMIN^;. The inside of the crust is covered by thin homy leaves (c, p. 395), ex- tending: all round it, and reaching from the coronary ring to the toe. They are about 500 in number, broadest at theii' base, and terminating in the most delicate expansion of horn. They not a little resemble the inner surface of a mushroom. In front they run in a direction from the coronet to the toe, and towards the quarters they are more slanting from behind forwards. They correspond, as will be presently shown, with similar fleshy leaves on the surface of the coffin-bone, and form a beautiful elastic body, by which the whole weight of the horse is supported. THE SOLE Is under and occupies the greater portion of the concave and elastic surface of the foot (see b, p. 395), extending from the crust to the bars and frog. It is not so thick as the crust, because, notwithstanding its situation, it does not support any weight ; and because it was intended to expand, in order to prevent concussion, when, by the descent of the bone of the foot, pressure was made on it. It is not so brittle as the crust, and it is more elastic. It does not consist of an equally dense fibrous tissue as the crust, but is developed in layers or scales, which freely exfo- liate as they accunmlate at the bottom of the foot. It is thickest at the toe, because the first and principal stress is thrown on that part. The coffin-bone is driven forward and downward in that direction. It is likewise thicker where it unites with the cmst than it is towards the centre, for a similar and evident reason, because there the weight is first and principally thrown. In a state of nature it is, to a certain degree, hollow. The reason of this is plain. It is intended tc descend or yield with the Aveight of the THE FKOG. 399 borse, and by that gradual descent or yielding most materially lessen the Shock which would result from the sudden action of the weight of the animal in rapid and violent exercise ; and this descent can only be given bv a hollow sole. A flat sole, ah-eady pressing upon the ground, couid not be brought lower; nor could the functions of the trog be then dis- charged ; nor would the foot? have so secure a hold. Then li the sole is naturally hollow— and hoUow it should be because it mustdescend— the smith should not interfere with this important action. Wlien the toot wiU bear it, he must pare out sufdcient of the horn to preserve the proper concavity ; also a small portion at the toe and near the crust, and cutting deeper towards the centre. He must put on a shoe which shall not, prevent the descent of the sole, and which not only shall not press upon it but shall leave suflacient room between it and the sole to admit ot this descent If the sole is pressed upon by the coffin-bone durmg the length- enincr of the elastic laminse, and the shoe will not permit its descent, the sensftive part between the coffin-bone and the horn ^viU necessarily be bruised and inflammation and lameness wHl ensue. It is from this cause, that if a stone insinuates itself between the shoe and the sole, it produces BO much lameness. Of the too great concavity of the sole, or the want of concavity in it, we shall treat when we arrive at diseases ot the toot. THE FROG. In the space between the bars, and accurately fiUing it, is the frog It is a triangular portion of horn, projecthig from the sole, almost on a level w^th the crust, and covering and defending a soft and elastic substance caUed the sensitive frog. It is Avide at the heels, and there extending beyond a portion of the crust ; narromng rapidly when it begms to be confined between the bars, and terminating m a pomt at somewhat more than half the distance from the heel to the toe. It consists of two rounded or projecting surfaces, \\ath a fissure or cleft between them reaching half way down the frog, and the two portions again unitmg to form the pomt or toe of the frog. . . n .,-,•.• ^ xl -4. The frog is firmly united to the sole, but it is perfectly distmct ti-om it. It is of a'^difi'erent nature, being softer, and far more elastic ; and it is secreted from a difi"erent surface, for it is thrown out from the substance which it covers. It is very analogous in texture to a piece of india-rubber, being neither so fibrous as the crust, nor as scaly as the sole. _ It very much resembles a wedge with a sharp point forwards : and it is placed towards the back part of the foot. The foot is seldom put flush and flat upon the ground, but in a direction downwards, yet somewhat forwards ; then the frog evidently gives safety to the tread of the animal, for it occasionally ploughs itself into the ground, and prevents the horse from shpping. This is of considerable consequence, when some of the paces of the horse are recollected, in which his heels evidently come first to the ground, and in which the danger from sHpping would be very great. Reference needs only be made to the gallop as illustrative of this. The froo- being placed at, and filUng, the hinder part of the foot, dis- charo-es a portion of the duty sustained by the crust ; for it supports the weio-ht of the animal. It assists, 'likewise, and that to a material degree, in the expansion of the foot. It is formed internally of two prominences on the sides (see a, p. 395), and a cleft in the centre, presenting two con- cavities with a sharp projection in the middle, and a gradually rounde(^ one on each side. It is also composed of a substance peculiarly flexible and elastic. What can be so well adapted for the expansion of the foot when a portion of the weight of the body is thrown on it ? How easUy will these irregular sui-faces yield and spread out, and how readily return 400 THE COFFIN-BONE. again to their xiatural state ! In tlais view, therefore, the homy frog is a powerful agent in opening the foot ; and the diminntion of the substance of the frog, and its elevation above the ground, are both the cause and the consequence of contraction — the cause, as being able no longer power- fally to act in expanding the heels, and the consequence, as obeying a law of nature, by which that which no longer discharges its natural function ifi gradually removed. It is, however, the cover and defence of the internal and sensible frog, which will be presently treated of ; enough, however, has been said to show the absurdity of the common practice of unsparingly cutting it away. In order to discharge, in any degree, some of the offices which we have assigned to it, and fully to discharge even one of them, it must come in occasional contact with the ground. In the unshod horse it is generally so ; but the additional support given by the shoes, and more especially the hard roads over which the horse is now compelled to travel, render this complete exposure of the frog to the ground not only ^un- necessary, but injurious. Being of so much softer consistence than the rest of the foot, it would be speedily worn away ; occasional pressure, how- ever, or contact with the ground, it must have The rough and detached parts should be cut off at each shoeing, and the substance of the frog itself, so as to bring it just above or within the level of the shoe. It will then, in the descent of the sole, when the weight ot the horse is thrown upon it in the putting down of the foot, descend like- wise, and pressing upon the gi-ouncl, do its duty ; while it will be defended from the wear, and bruise, and injury that it would receive if it came upon the ground with the first and full shock of the weight. This will be the proper guide to the smith in shoeing, and to the proprietor in the direction which he gives. The latter should often look to this, for it is a point of very great moment. A few smiths carry the notion o^ frog pres- sure to an absurd extent, and leave the frog beyond the level of the sole — a practice which is dangerous in the horse of slow draught, and destruc- tive to the hackney or the hunter ; but the majority of them err in a contrary way, and, cutting off too much of tlie frog, lift it above the ground, and destroy its principal use. It should be left just above, 07 witJiln the levet of the shoe. THE COFFIN-BONE. The interior part of the foot must now be considered. The lower pastern, a small portion of which is contained in the horny box, has been already described, p. 378 ; beneath it, and altogether enclosed in the hoof, is the coffin-bone, or proper bone of the foot. It is fitted to, and fills the forepart of the hoof, occupying about half of it. It is of a light and spongy structure, (see J, Hg. 1, page 378), and filled with numerous minute foramina or holes. Through these pass the blood-vessels and nerves of the foot, which are necessarily numerous, considering the im- portant and various secretions there carrying on, and the circulation through the foot which could not possibly be kept up if these vessels did not run through the substance of the bone. Considering the manner in which this bone is enclosed in the homy box, and yet the important sur- faces around and below it that are to be nourished with blood, the circula- tion which is thus carried on -svithin the very body of the bone is one of the most beautiful y)rovisions of nature that is to be found in the whole frame. No inconvenience can ai-ise from occasional or constant pressure, but the bone allows free passage to the blood, and protects it from every possible obstruction. The forepart of the coffin-bone is not only thus perforated, but it is curiously roughened for the attachment of the numerous minute laminis THE SENSITIVE SOLE. 401 a'bout to be described. On its upper surface it presents a concavity for the head of the lower pastern. In front is a striking prominence, into which is inserted tlie extensor tendon of the foot. At the back it is sloped for articulation with the na^-icular bone, and more underneath is a depres- sion for the reception of the perforans tendon, continued do^vn thi" leg, passing over the navicular bone, and at length inserted into this bone. On either side are projections, called the wings, or heels of the coffin-bone, and at the bottom it is hollowed to answer to theconvexity of the intemal part of the sole. That which deserves most attention in the coffin-bone is the production of the numerous laminae round its front and sides. Tliey are prolongations of the thick and elastic membrane covering it, and consist of fleshy plates, proceeding from it, running down the coffin-bone, and correspondjng with and received between the homy leaves that line the inside of the hoof — each homy plate being received between two sensitive plates, and vice versa. These laminae are exceedingly sensitive and vascular, and clastic, and, as first simply and beautifully explained by Mr. Percivall, their elas- ticity is not inherent in the laminae, but in the substance which connects these laminae with the coffin-bone, and which, while it contains highly elastic properties, affijrds a convenient bed for the numerous vessels that secrete the laminae. While the animal is at rest, the whole weight of the horse is supported by them, and not by the sole. This extraordinary fact has been put to the test of experiment. The sole, bars, and frog were removed from the foot of a horse, and yet as he stood, the coffin-bone did not protrude, or in the slightest degree descend ; but when the rapidity with which the foot descends is added to the weight of the horse, these little leaves, horny and fleshy, gradually lengthen, and suffer the bones to press upon tlie sole. The sole then descends, and, in descending, expands ; and so, by an admirable mechanism, the violent shock which would be produced by the pressure of such a weight as that of the horse, and the velocity with which it descends, is lessened or destroyed, and the compli- cated apparatus of the foot remains uninjured. When the foot is ag-aiii lifted, and the weight which pressed upon it is removed, the principle of elasticity is called into exercise, and by it the sole resumes its concavity, and the homy frog its folded state ; — the quarters return to their former situation, — the leaves regain their former length, and every thing is pre pared for a repetition of action. THE SENSITIVE SOLE. Between the coffin-bone and the horny sole is situated the sensitive sole, formed above of a substance of a fibrous nature, and below of a cuticular or skin-like substance, plentifully supplied with blood-vessels. It was placed between the coffin-bone and the sole, by its yielding structure to assist in preventing concussion, and also to form a supply of horn for the sole. It extends beyond the coffin-bone, but not at all under the frog. Leaving a space for the frog, it proceeds over the bars, and there is covered by some lamina?, to unite with those that have been described, page 397, as found in the bars. It is here likewise thicker, and more elastic, and by its elasticity is evidently assisting in obviating concuvssion. It is supplied with nervous fibres, and is highly sensitive, as the slightest experience in horses will evince. The lameness which ensues from the [)ressure of a stone or of the shoe on the sole is caused by inflammation of the sensitive sole. D D 402 THE NAVICULAR BONE. THE SENSITIVE FEOG. Tlie coffin-bone does not occupy more than one lialf of the hoof. The posterior part is filled by a soft mass, which is fibrous and elastic in its natirre. Its shape below corresponds with the cavities of the homy frog ; in front it is attached to the inferior part of the coffin-bone ; and farther back, it adlieres to the lower part of the cartilages ot the heels, where they begin to form the rounded protuberances that constitute the heel of the foot. It occupies the whole of the back part of the foot above the homy frog and between the cartilages. Running immediately above the frog, and along the greater part of it, we find the perforans flexor tendon, which passes over the naviculai bone, and is inserted into the heel of the coffin-bone. THE NAVICULAR BONE Is placed behind and beneath the lower pastern bone, and behind and above the heel of the coffin-bone, so that it forms a joint with both bones, and answers a very important office in strengthening the union between these parts, in receiving a portion of the weight which is thrown on the lower pastern, and in enabling the flexor tendon to act with more advan- tage. Supposing that this tendon were inserted into the coffin-bone without the intervention of the navicular bone, it would act at great mechanical disadvantage in bending the pastern, for it is inserted near the end of the coffin-bone, and the weight, concentrated about the middle of the bone, is far off, and requires a great power to raise it ; but when the navicular bone is interposed, the centre of motion becomes the posterior edge of that bone, where it is in contact with the tendon, and then it will be seen that the distance of the power from the centre of motion is nearly or quite the same as the weight, and very great expen- diture of muscular power will be saved. In the one case, the power must be at least double the weight, in the other they will be nearly equal ; and also the angle at which the tendon is inserted is considerably more advan- tageous. Perhaps this is the principal use of the navicular bone ; yet at the same time we are aware of the benefit which accrues from a portion of the -weight being taken from the coffin-bone, and thrown on the navi- cular bone, and from it on the tendon, and the tendon resting on the elastic frog underneath. The navicular bone is sometimes, but inaccu- rately, said to descend with the motion of the foot. It does not do that. It cannot ; for it is connected both with the pastern and cofiin-bonea by inelastic ligaments. When, however, the homy bulb, with its tuft of hair at the back of an obhque fetlock, descends in the rapid gallop, and almost touches the ground, the navicular bone, being as it were a part of the pastei-n, must descend with it. With this exception, both in the extend- ing and the bending of the pastern, the navicular bone turns or rolls upon the other bones rather than descends or ascends, and with this remarkable advantage, that when the pastern is extended, the navicular bone is placed in that situation which enables the flexor tendon to act with greatest ad- vantnge in again bending the foot. THE CARTILAGES OP THE FOOT, There is a groove extending along the upper part of the coffin-bone and on either side, except at the protuberance which receives the extensor tendon, occupied by cartilage, which, like the cnist, is convex outwards and concave inwards. It extends to the very post3rior part of the foot, rising about the quarters half an inch or more aho^ 3 the hoof, and dimi- THE DISEASES OF THE FOOT. 403 nisliing in lieiglit forward and backward. These cartilages occupy a con- siderable portion of the foot, and extend behind the coffin-bone. Thej are held in their situation not merely by this groove, but by other con- nections with the coffin-bone, the na\acular bone, and the flexor tendon, and are thus perfectly secured. Between these cartilages is the sensitive frog, filling up the whole of the space, and answering several important purposes, being an elastic bed on which the na,vicular bone and the tendon can play with security, and without concussion or shock, by which all concussion communicated to the cartilages of the foot is destroyed — by which these cartilages are kept asunder, and the expansion of the upper part of the foot preserved. As the descent of the sole increases the mdtli of the lower part of the foot, so the elevation of the frog, a portion of it being pressed upward and outward by the action of the navicular bone and tendon, causes the expansion of its upper part. Precisely as the strong muscle peculiar to quadrupeds at the back of the eye, being forcibly contracted, presses upon the fatty matter in which the ejo is imbedded, which may be dis- placed but cannot be squeezed into less compass, and which, bein"- forced towards the inner corner of the eye, drives before it that important and beautiful mechanism the haw, so the elastic and yielding substance the frog, being pressed upon by the navicular bone and the tendon, and the pastern, and refusing to be condensed icto less compass, forces itself out on either side of them, and expands the lateral cartilages, which again, by their inherent elasticity, recur to their former situation, when the frog no longer presses them outward. It appears, that by a different mechanism, but both equally admirable, and referable to the same principle, viz. that of elasticity, the expansion of the upper and lower portions of the hoof is effected, the one by the descent of the sole, the other by the compression and rising of the frog. It is this expansion upward which contributes principally to the preser- vation of the usefulness of the horse, when our destructive methods of shoeing are so calculated to destroy the expansion beneath. In draught horses, inflammation is occasionally produced, which terminates in the ■cartilages being changed into bony matter. CHAPTER XIX. THE DISEASES OF THE FOOT. Of these there is a long list. That will not be wondered at by those who have duly considered the complicated structure of the foot, the duty it has to perform, and the injuries to which it is exposed. It -wall be proper to commence with that which is the cause of many other diseases of the foot, and connected with almost all, INFLAMMATION OP THE FOOT, OR ACUTE FOUNDEK, The sensitive laminte, on the front and sides of the coffin-bone, being replete with blood-vessels, are, like every other vascular part, liable to inflammation. Laminitis, or inflammation of the laminae of the feet, is most prevalent amongst the heavier breeds of horses, especially when the feet are flat and weak. It may be produced by several causes, but v, e most often meet with it as a result of rapid and long-continued exertion on hard ground. When we reflect how the feet have been battered and brui/^ed DD 2 404 INFLAMMATION OF THE FOOT, OE, ACUTE FOUNDER. in a hard day's journey, it will be no wonder tliat inflammation of the overworked parts sliould sometimes ensue. It may also be caused by keeping the animal in a fixed standing position for a lengtli of time ; by tbese means the laminae are kept constantly on the stretch ; hence its fre- quency amongst horses as the result of a prolonged voyage on board a ship. Sometimes there is a sudden metastasis — change of inflammation from one organ to another. A horse may have laboured for several d;iys under evident inflammation of the lungs or pleura ; all at once that will subside, and the disease will appear in the feet, or inflammation of the feet may follow in cases also of superpurgation or excessive purgiiig, whether from physic or irritation of the mucous membrane of the bowels. To this latter cause may perhaps be attributed the inflammation of the feet, which frequently follows when animals have been allowed new corn, especially wheat. To the attentive observer the symptoms are clearly marked, and yet there is no disease so often overlooked by the groom and the carter, and even by the veterinary surgeon. The disease may assume an acute or a chronic form. The earliest symptoms of fever in the feet are fidgetiness, fi-equent shifting of the fore-legs, but no pawing, much less any attempts to reach the belly with the hind- feet. K only the fore-feet be afiected, he will throw them very forward, and rest on the heels. If it attack all the feet, the hind-legs will be placed under the belly and the fore-feet considerably advanced. The pulse is quickened, the flanks heaving, the nostrils red, the body covered vnih perspiration, and the horse, by his anxious countenance, indicating great pain. Presently he looks about his litter, as if preparmg to lie down, but he does not do so immediately ; he continues to shift his weight fi'om foot to foot ; he is afraid to di-aw his feet sufficiently under him for the purpose of lying down ; but at length he di'ops. The circumstance of his lying down at an early period of the disease will suflBciently distinguish inflammation of the feet from that of the lungs, in which the hoi'se obstinately persists in standing until he drops from mere exhaustion ; but the distinction is by no means so clear when, as frequently happens, he obstinately stands until he dj'ops. The same fixedness of hmb, the same disinclination to move, as is perceptible in severe cases of inflammation of the lungs, will be found to exist occasionally in this disease, and it is the fact of the attention not having been attracted to the feet, that has led to the fallacious opinion, that the disease has dropped from the lungs to the feet, when in fact it has been in the feet from the very commencement — the hurried and laboured respi- ration being sympathetic with and dependent on the pain in the feet, not on inflammation of the lungs themselves. His quietness when down will distinguish it from colic or inflammation of the bowels, in both of which the horse is up and down, and frequently rolling and kicking when down. WTien the grievance is in the feet, the horse experiences so much relief, fi^om getting rid of the weight painfnlly distending the inflamed and highly sensitive laminae, that he is glad to he as long as he can. If the feet are now examined, they will be found evidently hot. The patient will express pain if they are slightly rapped with a hammer, and the artery at the pastern ^vill throb violently. No great time will now pass, if the disease is sufiered to pursue its course, before he will be per- fectly unable to rise ; or, if he is forced to get up, and one foot is lifted, he "vvill stand with difficulty on the other, or perhaps di'op at once fr-om intensity of pain. The treatment will resemble that of other inflammations, with such differences as the situation of the disease may suggest. Bleeding is in- CHROMC LAillNlTIS. PLMICED rEET. 405 dispensable ; and that to its fullest extent. K the disease is confined to the fore-feet, blood should be freelj abstracted from the brachial veins, but if all the feet be implicated, six or eight quarts of blood should be taken as soon as possible from the jugular vein. The shoes should be at once removed, and poultices of linseed meal or bran, made very soft with warm water, should cover the whole of the foot and pastern, and be fre- quently renewed, wliich -n-ill promote evaporation from the neighbouring parts, and possibly through the pores of the hoof, and, by softening and rendering supple the hoof, will relieve its painful pressure on the swelled and tender parts beneath. There used to be occasional doubt as to the administration of physic, from fear of metastasis of inflammation, but the fear is groundless ; a full dose of physic may be given immediately after the bleeding. The horse should be kept on mash diet, unless green meat can be pro- cured for him ; and even that should not be given too liberally, nor should he, in the slightest degree, be coaxed to eat. When he appears to be re- covering, his getting on his feet should not be hurried. It should be left perfectly to liis own discretion ; nor should even walking exercise be per- mitted until he stands firm on his feet. "\Mien that is the case, a bhster should be applied to the coronets, and when the season will permit, two months' run at grass will be very serviceable. It is not always, however, or often, that inflammation of the feet is thus easily subdued ; and, if it is subdued, it sometimes leaves after it some feai-ful consequences. The loss of the hoof is not an unfrequent one. About six or seven days from the first attack, a shght separation w-ill begin to appear between the coronet and the hoof. This should be care- fully attended to, for the separated horn will never again unite with the parts beneath, but the disunion will extend, and the hoof will be lost. It is true that a new hoof will be formed, but it will be smaller in size and weaker tluan the first, and will rarely stand hard work. WTien this sepa- ration is observed, it will be a matter of calculation with the proprietor of the horse whether he will suflfer the medical treatment to proceed. In other cases, a separation will take place between the sensitive and horny lamiufe, by which the coffin-bone is let down, producing what is called pumiced feet. CHRONIC LAMINITIS. This is a milder form of the preceding disease. There is lameness but it is not so severe as in the former case. The horse stands as usual. The crust is warm, and that warmth is constant, but it is not often probably greater than in a state of health. The surest sj-mptom is the action of the animal. It is diametrically opposite to that in the na\'icular disease. The horse throws as much of his weight as he can on the posterior parts of his feet. The treatment should be similar to that recommended for the acute disease — blood-letting, cataplasms, fomentations, and blisters, and the last much sooner and much more frequently than in the foiTuer disease. PUMICED FEET. The sensitive and homy laminaa which were partially separated during the intensity of the inflammation of founder, will never perfectly unite again, or will have lost much of their elasticity, and the coffin-bone no longer fully suppoi'ted by them, presses upon the sole, and the sole 'be- comes flattened, or convex, from this unnatural weight, and the horse acquires a pumiced foot. This will also happen when the animal is used too soon after an attack of uiflammation of the feet, and before the 40b SEEDY TOE. laminEe have regained sufficient strength to support the weight of the horse, or to contract again by their elastic power when they have yielded to the weight. When the coffiji-bone is thus throwni on the sole, and renders it pumiced, the crust at the front of the hoof will *■ fall in,^ leaving a kind of hollow about the middle of it. Pumiced feet, especially in horses Vith large wide feet, are frequently produced without this acute iaflammation. Undue work, and especially mach battering of the feet on the pavement, will extend and sprain these laminae so much, that they will not have the power to contract, and thus the coffin-bone will be thrown backward on the sole. A very important law of nature vnll unfortunately soon be active here. When pressure is apphed to any part, the absorbents become busy in removing it ; so, when the coffin-bone begins to press upon the sole, the sole becomes thin from the increased wea^r and tear to which it is subjected by contact -with the ground, and also because these absoi-bents are rapidly taking it away. This is one of the diseases of the feet for which there is no cure, and used to be the common residt of fever in the feet ; it is therefore a point of primary importance, to have all the available remedies applied before this irremediable mischief occurs, for then the result is inevitable. No skill is competent to effect a reunion between the separated sensitive and horny laminje, or to restore to them the strength and elasticity of which they have been deprived, or to take up that hard homy substance which speedily fills the space between the crust and the receding coffin-bone. Some efforts have been made to palhate the disease, but they have been only to a slight degree successful. If horses, on the first appearance oi flat feet, were turned out in a dry place, or put into a box for two or three months, sufficient stress would not be thrown on the laminae to increase the evil, and time might be given for the gi'owth of horn enough in the sole to support the coffin-bone ; yet it is much to be doubted whether these horses would ever be useful, even for ordinary purposes. The slowest work required of them would drive the coffin-bone on the sole, and the projection would gradually reappear, for no power and no length of time can again unite the separated leaves of the coffin-bone and the hoof. All that can be done in the way of palliation is by shoeing. Nothing must press on the projecting and pumiced part. If the projection is not con- siderable, a thick bar shoe is the best thing that can be apphed ; but should the sole have much descended, a shoe with a very wide web, be- velled off so as not to press on the part, may be used. These means of rehef, however, are only temporary, the disease will proceed ; and, at no great distance of time, the horse will be useless. The occasional removal of the shoe, and compelhng the horse to stand for a while on the crust and lamina), has been resorted to. The bar shoe and the leathern sole, and occasional dressing with tar ointment, have had their advocates, and it is sufficiently plain that the p"miced foot should have plenty of cover. SEEDY TOE. This consists in a separation between the fibres of the sensitive and horny laminse, producing a hollow space between them. The sensitive lamina;, however, ai'e not exposed, but covered by a plastic horny ma- terial. It is sometimes met with in both the fore and hind-feet, but more frequently in the former. It is a species of dry rot, and generally caused by some ^aolence to the upper jiart of the hoof by which it is rendered unnaturally brittle. There is usually a bulging out of some part of the wall of the foot, which, on being rapped, sounds hollow, and on the shoe being removed and the part examined, a space of greater or less CONTRACTION. 407 extent ■will be foimd to exist between the lioof and internal structures of the foot, generally commencing at the toe and extending upwards. ' In its early stages, it is not generally attended with lameness, but as the disease progresses, we frequently get considerable pain and lameness. Our treatment, when the disease has not made much progress, should consist in cleaning out the hollow, and filling the space with pitch com- bined with tar, placing a leather sole on the foot, and taking care to avoid driving the nails near the diseased part. K the animal can be spared, a bHster should be apph'ed to the coronet. Should the disease have far advanced, and considerable lameness be present, the detached wall form- ing the boundary of the hollow, must all be cut away and tar dressing applied to the surface. A bar shoe should be placed on the foot, and the coronet well bhstered. The animal should be thrown out of work, and the blister several times repeated. The object of the blister will be to stimulate the secretion of new horn, which, under any circumstances, will be found a very slow process. CONTRACTION. The cut, page 395, will give a fair idea of the young healthy foot, approaching nearly to a circle, and of which the quarters form the widest part, and the inner quarter (this is the near foot) rather wider than the outer. This shape is not long preserved in many horses, biit the foot increases in length, and narrows in the quarters, and particularly at the heel, and the frog is diminished in width, and the sole becomes more concave, and the heels higher, and lameness, or at least a shortened and feeling action, ensues. It must be premised that there is a great deal more horror of contracted heels than there is occasion for. Many persons reject a horse at once if the quarters are iviring in ; but the fact is, that although this is an unnatural form of the hoof, it is slow of growth, and nature kindly makes that provision for the slowly altered form of the hoof which she does in similar cases — she accommodates the parts to the change of form. As the hoof draws in, the parts beneath, and pai-ticularly the coffin-bone, and especially the heels of that bone, diminish ; or, after all, it is more a change of form than of capacity. As the foot lengthens in proportion as it narrows, so does the coffin-bone, and it is as perfectly adjusted as before to the box in which it is placed. Its laminas are in as intimate and perfect union with those of the crust as before the hoof had begun to change. On this account it is that many horses, with very contracted feet, are perfectly sound, and no horse should be rejected merely because he has contraction. He should undoubtedly be examined more carefully, and with considerable suspicion ; but if he has good action, and is other- wise unexceptionable, there is no reason that the purchase should not be made. A horse with contracted feet, if he goes sound, is better than another with open but weak heels. The opinion is perfectly erroneous that contraction is the necessary consequence of shoeing. There can be no doubt that an inflexible iron ring being nailed to the foot prevents, to a very considerable degree, the descent of the sole and the expansion of the heels below ; and it is like- wise probable, that when the expansion of the heels is prevented, they often begin to contract. But here again nature, cut off from one resource, finds others. If one of the jugular veins is lost, the blood pursues its course by other channels, and the horse does not appear to suffer in the shghtest degree. Thus also if the expansion of the heels below is diminished, that of the cartilages above is made more use of. If the coffin-bone has not so much descent downward, it probably acquires one 108 CONTRACTION. back-ward, and the fimctions of the foot are usefully If not perfectly performed. The plain proof of this is, that although there are many horses that are injua'ed or ruined by bad shoeing, there are others, and they are a numerous class, who suffer not at all from good shoeing, and scarcely even from bad. Except it be from accident, how seldom is the farmer's horse lame ; and it might even be farther asked, how seldom is his foot much contracted ? Some gentlemen who are careful of their horses have driven them twenty 3-ears, and principally over the rough pavements of towns, without a day's lameness. Shoeing may be a neces' sary evil, but it is not the evil which some speculative persons have supposed it to be ; and the undoubted fact is, that when the horse is put to real hard work, and when the injury produced by shoeing in destroying the expansibility of the foot would most of all show itself, the foot lasts a great deal longer than the leg ; nay, horsemen tell us that one pair of good feet is worth two pair of legs. Having thus premised that contraction is not inevitably accompanied by lameness, and that shoeing, with all its evils, does not necessarily produce it, those cases of contraction, too numerous, which are the consequence of our stable management, and which do cripple and ruin the horse, may be considered. There is nothing in the appearance of the feet which would enable us to decide when contraction is or is not destructive to the usefulness of the animal ; his manner of going, and his capability for work, must be our guides. Lameness sometimes accompanies the begin- ning of contraction ; it is frequently attendant on rapid contraction, but it does not always exist when the icirhig in is slow or of long standing. A very excellent writer, particularly when treating of the foot of the horse, Mr. Blaine, has given us a long and correct list of the causes of injurious contraction, and most of them are, fortunately, under the control of the owner of the animal. He places at the head of them, neglect of faring. The hoof is continually growing, the cnist is lengthening, and the sole is thickening. This is a provision for the wear and tear of the foot in an unshod state ; but when it is protected by a shoe, and none of the horn can be worn away by coming in contact with the ground, and the growth of horn continues, the hoof grows high, and the sole gets thick, and, in consequence of this, the descent of the sole and the expan- sion of the heels are prevented, and contraction is the result. The smith might lessen, if not prevent the evil, by carefully thinning the sole and lowering the heels at each shoeing ; but the first of these is a matter of considerable labour, and the second could not be done effectually ^vdthout being accompanied by the first, and therefore they are both neglected. The prejudice of many owners of horses assists in increasing the evil ; they imagine that a great deal of mischief is done by cutting away the foot. Mischief may be the result of injudicious cutting, when the bars are desti^oyed, and the frog is elevated from the ground ; but more evil results fi'om the unpelding thickness of the horn of the sole impairing the elastic and exjDansive principle of the foot. If gentlemen would occasionally stand by, and see that the sole is properly thinned, and the heels lowered, they would be amply repaid in the comfort and usefulness of the liorse. ril-jndged economy is another source of this disease. If the shoes of one smith will, with ordinary work, last a little more than three weeks, while another contrives to make his last six weeks, he is supposed to be the better workman and the more honest man, and he gets the greater part of the custom. His shoe is suffered to remain on during the whole time, to the manifest injury of the feet, and that injur}' is materially increased by the greater thickness and weight of the;3e shoes, and the tightness with CONTRACTION. 409 wJiich tliey are fastened on, tlie nails being necessarily placed nearer to tlie quarters, and possibly an additional nail or two used in the fastening, and these also applied at the quarters. There is no rule which admits of so little exception as that, once in about every three weeks, the growth of horn, which the natural wear of the foot cannot get rid of, should be pared away — the toe should be shortened in most feet — the sole should bo thinned, and the heels lowered. Every one who has carefully observed the shape of the horse's foot, must have seen that in proportion to its height or neglected growth, it contracts and closes round the coronet. A low- heeled horse might have other serious defects, of which it will be our duty to speak, but he has seldom a contracted foot. Another source of contraction is the want of natural moisture. The unshod colt has seldom contracted feet, nor does the horse at grass acquire them, because the hoof is kept cool and damp by occasional rain, and by the regular dew. It is thus rendered supple, and its elasticity is pre- served, and the expansive power of the foot is uninjured. The hoof of the stabled horse sometimes has not one drop of moisture on it for several days. The effect of this, in the contraction of the horn, is sufficiently evident. Hence the propriety of stopping the feet where there is the least Oi.ndency to contraction. The intelligent and careful groom will not omit it i. single night. Cow-dung, with a small portion of clay to give it con- sistence, is a common and very good stopping. A better one is cow-dung with a small proportion of tar mixed with it. A good one is a piece of thick felt cut to the shape of the sole and soaked in water. The common stopijing of tar and grease is peculiarly applicable to the 'crust or wall, making it tough and elastic instead of being brittle and shelly. The usual management of the farmer's horse that is often turned out after his daily task is exacted, or whose work is generally performed where the feet are exposed to moisture, is an excellent pi-eveutive against contraction. Some persons have complained much of the influence of Htter. If the horse stands many hours in the day with his feet imbedded in straw, it is supposed that the hoof must be unnaturally heated ; and it is said that the horn will contract under the influence of heat. It Is seldom, however, that the foot is so surrounded by the litter that its heat will be sufficiently increased to produce this efi'ect. The question is not, however, whether the litter will heat the feet, but to what extent. From its being a bad conductor of heat, it is injurious ; and from this cause it will be found that the heat of the feet, instead of being carried ofi" as fast as it Is gene- rated, as It would be were it a good conductor, accumulates and produces mischievous results. There are thousands of horses that stand upon straw twenty hours out of the twenty- four, without receiving the slightest injury from it. The author of this work is not one of those who would, during the day, remove all litter from under the horse. It gives a naked and uncomfortable appearance to the stable. Humanity and a proper care of the foot of the horse should induce the owner to keep some Utter under the animal during the day ; but his feet need not sink so deeply in It that their temperature becomes much aSected. If the straw is suffered to remain until It Is wet, hot, and rotten, the effluvia proceeding from It may produce cough, or Inflammation of the eyes, or thrushes in the feet ; bat a light bed of straw, with tolerable attention to cleanliness, can never do harm. ' There are horses,' says Professor Stewar-t, ' that, in the habit of pawing and stamping, slip about and sometimes lame themselves on the bare stones; many disposed to lie down during the day wiU not, or ought not, to do it, with a slight portion of litter under them. It is a fi-cqucut observation without regard to road horses, and many others, that the more a horse ilO CONTRACTION. lies tlie better lie works. Lame or tender-footed horses cannot lie toe mucli, and a great deal of standing ruins the best legs and feet. Some horses, indeed, do not need this day-bedding, but many are the better for it, and none are the worse.' Thrnshes are much oftener the consequence than the cause of contrac- tion. The horny frog, yielding to the pressure of the contracted quarters, is diminished in size, and the lower poi-tion of the fleshy frog becomes imprisoned, irritated, and inflamed, and pus or matter is discharged at the cleft ; yet there are many heels in the last stage of contraction that are not thrushy. On the other hand, thrush never long existed, accompanied by much discharge, without producing a disposition to contraction ; there- fore, thrush may be considered as both the cause and consequence of contraction. The removal of the bars takes away a main impediment to contraction. Their use in assisting the expansion of the foot has been already stated, and should a disposition to contraction be produced by any other cause, the cutting away of the bars would hasten and aggravate the evil ; but the loss of the bar would not of itself produce contraction. The contraction, however, that is connected with permanent lameness^ although increased by the circumstances which we have mentioned, usually derives its origin from a different source, and from one that acts violently and suddenly. Inflammation of the little plates covering the cofiin-bone is a frequent cause ; and a degree of inflammation not suffi- ciently intense to be characterised as acute founder, but quickly leading to sad results, may and does spring from causes almost iinsuspected. There is one fact to which we have alluded, and that cannot be doubted, that contraction is exceedingly rare in the agricultural horse, but frequently occurs in the stable of the gentleman and the coach-proprietor. It is rare where the horse is seemingly neglected and badly shod ; and frequent where every care is taken of the animal, and the shoes are unexceptionable and skilfully applied. Something may depend upon the breed. Blood horses are particularly liable to contraction. Not only is the foot naturally small, but it is disposed to become narrower at the heels. On the other hand, the broad, flat foot of the cart-horse is subject to diseases enough, but contraction is seldom one of the number. Whatever is the cause of that rapid contraction or narrowing of the heels which is accompanied by severe lameness, the symptoms may be easily distinguished. While standing in the stable, the horse will point with, or place forward, the contracted foot, or, if both feet are affected, he will alternately place one before the other. When he is taken out of the stable, he will not, perhaps, exhibit the decided lameness which character- ises sprain of the flexor tendon, or some diseases of the foot ; but his step Avill be peculiarly short and quick, and the feet will be placed gently and tenderly on the ground, or scarcely lifted from it in the walk or the trot. It would seem as if the slightest irregularity of surface would throw the animal down, and so it threatens to do, for he is constantly tripping and stumbling. K the fore-feet are carefully observed, one or both of them will be naiTOwed across the quarters and towards the heels. In a fev cases the whole of the foot appears to be contracted and shrunk ; but in the majority of instances, while the heels arc narrower, the foot is longer. The contraction appears sometimes in both heels ; at other times in the inner heel only ; or, if both are affected, the inner one is iv'ired in the most, either from the coronet to the base of the foot, or only or principally at the coronet — oftener near the base of the foot — but in most cases the hollow being greatest about midway between the coronet and the bottom of the foot. This irregularity of contraction, and uncertainty as to the CONTRACTION'. 411 placo of it, prove that it is some internal disorganisation, tlio seatof wliicli varies -with the portion of the attachment between the hoof and the foot that was principally strained or injured. In every recent case the contracted part will be hotter than the rest of the foot, and the sole will, in the majority of cases, be unnaturally concave. Of the treatment of contraction attended with lameness little can be said that will be satisfactory. Numberless have been the mechanical contri- vances to oppose the progress of contraction, or to force back the foot to its original shape, and many of them have enjoyed considerable but short- lived reputation. A clip was placed at the inside of each heel, wliich, resting on the bars, was intended to afford an insurmountable obstacle to the farther wiring in of the foot, while the heels of the shoe were bevelled outward in order to give the foot a tendency to expand. The foot, how- ever, continued to contract, until the clip was imbedded in the horn, and worse lameness was produced. A shoe jointed at the toe, and with a screw adapted to the heels, was contrived, by which, when softened by poulticing, or immersion in warm water, the quarters were to be irresistibly widened. They were widened by the daily and cautious use of the screw until the foot seemed to assume its natural form, and the inventor began to exult in having discovered a cure for contraction : but no sooner was the common shoe again applied, and the horse had returned to his work, than the heels began to narrow, and the foot became as contracted as ever. Common sense would have foretold that such must have been the result of this expansive process ; for the heels could have been only thus forced asunder at the expense of partial or total separation from the interior portions of the foot with which they were in contact. The contracted heel can rarely or never permanently expand, for this plain reason, that although we may have power over the crust, we cannot renew the lamina?, or restore the portion of the frog that has been absorbed. If the action of the horse is not materially impaired, it is better to let the contraction alone, be it as great as it will. If the contraction has evidently produced considerable lameness, the owner of the horse will have to calculate between his value if cured, the expense of the cure, and the probabihty of failure. The medical treatment should alone be undertaken by a skilful veteri- nary surgeon, and it will principally consist in abating any inflammation that may exist, by local bleeding and physic, paring the sole to the utmost extent that it will bear ; rasping the quarters as deeply as can be, without theu' being too much weakened, or the coronary ring (see h, p. 395) injured ; rasping deeply likewise at the toe, and perhaps scoring at the toe. The horse is afterwards made to stand during the day in wet clay, placed in one of the stalls. He is at night moved into another stall, and his feet bound up thickly in wet clothes ; or he is tui'ned out into wet pasturage, with tips, or, if possible, ■v\athout thorn, and his feet are frequently pared out, and the quarters lightly rasped. In five or six months the horn will generally have gro^vn down, when he may be taken up, and shod ^dth shoes unattached by nails on the inner side of the foot, and put to gentle work. The foot will bo found very considerably enlarged, and the owner "wdll, perhaps, think that the cure is accomplished. The horse may, pos- sibly, for a time stand very gentle work, and the inner side of the foot being left at hberty, its natxa'a] expansive process may be resumed : the internal part of the foot, however, has not been healthily filled up with the expansion of the crust. If that expansion has been effected forward on the quarters, the crust will no longer be in contact -wnth the lengthened 412 NAVICULAR DISEASE. and narrowed heels of the coffin-bone. There will not be the natm-aJ adhesion and strength, and a very slight cause, or even the very habit of contraction, will, in spite of all care and the freedom of the inner quarter, in very many instances cause the foot to wire in again as badly as before. • NAVICULAR DISEASE. ]\rany horses with well-formed and open feet become sadly and penna- nently lame, and veterinary surgeons have been puzzled to discover the cause. The farrier has had his convenient explanation, ' the shoulder ; ' but the scientific practitioner may not have been able to discover an os- tensible cause of lameness in the whole limb. There are few accustomed to horses who do not recollect an instance of this. Behind and beneath the lower pastern-bone, and behind and above the heel of the coffin-bone, is a small bone called the navicular or shuttle-bone. It is so placed as to strengthen the union between the lower pastern and the coffin-bone, and to enable the flexor tendon, which passes over it in ordet to be inserted into the bottom of the coffin-bone, to act with more advan- tage. It forms a kind of joint with that tendon. There is a great deu) of weight tliro"mi on the navicular bone, and from the navicular bone on the tendon ; and there is a great deal of motion or play between them in the bending and extension of the pasterns. Numerous dissections have shown that this joint, formed by the teiidon and the bone, has been the frequent, and the almost invariable, seat of this obscure lameness. The membrane covering the cartilage of the bone has been found in an ulcerated state ; the cartilage itself has been ulcerated and eaten away ; the bone has become carious or decayed, this caries, or decay, however, does not occur in that snrface of the bone forming a portion of the coffin-joint — but on that surface over which the flexor tendon passes, and as the disease progresses, tlie tendon itself becomes much attenuated. Navicular disease is seldom met with in young horses, or those employed for slow work, but generally amongst well-bred horses, with strong feet, used for fast purposes on hard ground. Stable management has little to do with the production of this disease, any farther than if a horse stands idle in the stable several days, and the structure of the foot, and all the apparatus connected with motion, beconi FALSE QLARTER. This unpleasant noise arises from tlie toe of the hind-shoe knocking against the toe of the shoe of the fore-foot. In the trot, one fore-leg and the opposite hind leg are first Hfted from the ground and moved forward, the other fore-leg and the opposite hind-leg remaining fixed ; but, to keep the centre of gi'a^^ty witliin the base, and as the stride, or space passed over bj these legs, is often greater than the distance between the fore and hind-feet, it is necessary that the fore-feet should be alternately moved out of the way for the hind ones to descend. Then, as occasionally happens with horses not perfectly broken, and that have not been taught their paces, and especially if they have high hinder quarters and low fore ones, if the fore-feet are not raised in time the hind-feet will strike them. The fore- foot will generally be caught when it has just begun to be raised, and the toe of the hind- foot will meet the middle of the bottom of the fore-foot. It is an unpleasant noise, and not altogether free from danger ; for it may so happen that a horse, the action of whose feet generally so much inter- feres with each other, may advance the hind-foot a little more rapidly, or raise the fore one a little more slowly, so that the blow may fall on the heel of the shoe, and loosen or displace it ; or the two shoes may be locked together, and the animal may be thrown ; or the contusion may be received even higher, and on the tendons of the leg, and considerable swelling and lameness may follow them ; these, however, are rare occurrences. If the animal is young, the action of the horse may be materially im- proved ; otherwise nothing can be done, except to keep the toe of the hind- foot as short and as square as it can safely be, removing the clip from the toe and placing two smaller ones, one on each side of it ; and to bevel off and round the toe of the shoe, like that which has been worn by a stumbler for a fortnight, and perhaps a little to lower the heel of the fore-foot. A blow received on the heel of the fore-foot in this manner has not un- frequently, and especially if neglected, been followed by quittor. FALSE QUARTER. If the coronary hgament, by which the horn of the crust is secreted, is dix-ided by some cut or bruise, or eaten through by any caustic, there will tjccasionally be a division in the horn as it grows down, either in the form of a permanent sand-crack, or one portion of the hom overlapping the other. It occasionally follows neglected sand-crack, or it may be the con- sequence of quittor. This is exteriorly an evident fissure in the horn, and extending from the coronet to the sole, but not always penetrating to the laminae. It is a very serious defect, and exceedingly diflBcult to remedy ; for occasionally, if the horse is over- weighted or hurried on his journey, the fissure v^T-II open and bleed, and very serious inconvenience and lameness may ensue. Grit and dirt may insinuate itself into the aperture, and penetrate to the sensitive lamina?. Inflammation will al- most of necessity be produced; and much mischief will be effected. While the energies of the animal are not severely taxed, he may not experience much inconvenience or pain ; but the slightest exertion will sometimes cause the fissure to expand, and painful lameness to follow. This is not only a very serious defect, but one exceedingly difiicult to remedy. The coronary ligament must be restored to its perfect state, or at least to the discharge of its perfect function. Much danger would attend the application of the caustic in order to effect this. A blister, sufficiently active, apphed to the coronet at the injured part, affords the best chance of success ; but when any portion of the secreting surface has been destroyed, there is no remedy will restore it — the edges of the tiom on either side of the crack may be thinned, the hoof supported — and QUITTOR. 417 *.he separated parts held together by a firm encasement of pitch, as de- scribed when speaking of the treatment of sand-crack. The coronet must be examined at leaNt once in every fortnight, in order to ascertain whether the desired anion has taken place; and as a palliative during the treat- ment of the case, or if the treatment should be unsuccessful, a bar- shoe may be used, and care taken that there be no bearing at or immediately under tlie separation of the horn. This will be best effected, when the crust is thick and the quarters strong, by paring off a little of the bottom of the crust at the part, so that it shall not touch the shoe ; but if the foot is weak, an indentation or hollow should be made in the shoe. Strain or concussion on the immediate part vn.\l thus be avoided, and, in sudden or violent exertion, the crack will not be so likely to extend upward to the coronet, when whole and sound horn has begun to be formed there. James Clark, whose works have not been valued as they deserve, expresses in few words the real state of the case, and the course that should be pursued : — ' We may so for palliate the complaint as to render the horse something useful by using a shoe of such a construction as will support the limb wdthout resting or pressing too much upon the weakened quarter.' A proper stopping should also cover the sole, on which some coarse tow may be placed, and a piece of leather over that; the whole being confined by a broad web shoe. In some cases false quarter assumes a less serious character. The horn grows down whole, but the ligament is unable to secrete that which is perfectly healthy, and therefore a narrow slip of horn of a different and lighter colour is produced. This is sometimes the best result that can be procured when the surgeon has been able to obhterate the absolute crack or separation. It is, however, to be regarded as a defect not sufiicient to condemn the horse, but indicating that he has had sand-crack, and that a disposition to sand-crack may possibly remain. There wall also, in the generality of cases, be some degree of tenderness in that quarter, which may produce slight lameness when unusual exertion is required from the horse, or the shoe is suffered to press long on the part. QUITTOK, This has been described as being the result of neglected or bad tread or over-reach ; but it may be the consequence of any wound in the foot, and in any part of the foot. In the natural process of suppuration, matter is thrown out from the wound. It precedes the actual healing of the part. The matter which is secreted in wounds of the foot is usually pent up there, and increasing in quantity, and urging its way in every direction, it forces the little fleshy plates of the cofiin-bone from the horny ones of the crust, or the homy sole from the fleshy sole, or even penetrates deeply into the internal parts of the foot. These pipes or sinuses run in every direction^ and constitute the essence of qidttor. K it arises from a wound at the bottom of the foot, the purulent matter which is rapidly formed is pent up there, and the nail of the shoe or the stub remains in the wound, or the small aperture which was made is im- mediately closed again. This matter, however, continues to be secreted, and separates the horny sole from the fleshy one to a considerable extent, and at length forces its way upwards, and appears at the coronet, and usually at the quarter, and there slowly oozes out, while the aperture and the quantity discharged are so small tlaat the inexperienced person would have no suspicion of the extent of the mischief within, and the difficulty of repairing it. The opening may scarcely admit a probe into it, yet over the greater part of the quarter and the sole the horn may have separated from ^he foot, and the matter may have penetrated under the cartilages E E 41 a QUllTOR. and ligaments, and into the coffin-joint. Not only so, but t^vo mis- ehicvous results may have been produced, — the pressure of the matter wherever it has gone has formed ulcerations that are indisposed to heal, and that require the application of strong and painful stimulants to induca them to heal ; and, worse than this, the horn, once separated from the sen- sitive parts beneath, will never again unite with them. Quittor may occur in both the fore and the hind-feet. It will be sufficiently plain that the aid of a skilful practitioner is here requisite, and also the full exercise of patience in the proprietor of the horse. It may be necessary to remove much of the homy sole, which will speedily be reproduced when the fleshy surface beneath can be brought to a healthy condition ; but if much of the hom at the quarters must be taken away, five or six months may probably elapse before it will be suf- ficiently grown down again to render the horse useful. [Measures of considerable severity are indispensable. The application of some caustic will alone produce a healthy action on the ulcerated sur- faces ; but on the ground of interest and of humanity we protest against the brutal practice, or at least the extent to which it is carried, that is pursued by many ignorant smiths, of coring out, or deeply destroying the healthy as well as the diseased parts — and parts which no process will again restore. The unhealthy surface miist be removed ; but the cartilages and ligaments, and even poi'tions of the bone, need not to be sacrificed. The experienced veterinary surgeon will alone be able to counsel the proprietor of the horse, when, in cases of confirmed quittor, there is reason- able hope of permanent cui'e. A knowledge of the anatomy of the foot is necessary to enable him to decide what parts indispensable to the action of the animal may have been irreparably injured or destroyed, or to save these parts from the destructive effect of torturing caustics. When any portion of the bone can be felt by the probe, the chances of success are diminished, and the owner and the operator should pause. "WTien the joints are exposed, the case is hopeless, although, in a gi'eat many instances, the bones and the joints are exposed by the remedy and not by the disease. One hint may not be necessary to the practitioner, but it may guide the determination and hopes of the owner : if, when a probe is introduced into the fistulous orifice on the coronet, the direction of the sinuses or jpijyes is backward, there is much probabiHty that a cure may be effected ; but if the direction of the sinuses is forward, the cure is at best doubtful. In the first instance, there is neither bone nor joint to be injured ; in the other, the more important parts of the foot are in danger, and those in wliich the principal action and concussion are found. Neglected bruises of the sole sometimes lay the foundation of quittor. When the foot is flat, it is very liable to be bruised if the horse is ridden fast over a rough and stony road ; or, a small stone, insinuating itself be- tween the shoe and the sole, or confined by the curvature of the shoe, wiU frequently lame the horse. The heat and tenderness of the part, the oc- casional redness of the hom, and the absence of puncture, will clearly mark the bruise. The sole must then be thinned, and particularly over the bruised part ; and, in neglected cases, it must be pared even to the quick, in order to ascertain whether the inflammation has run on to sup- puration. The principal causes of bruises of the foot are leaving the sole too much exposed by means of a narrow- webbed shoe, or the smith paring out the sole too closely, or the pressure of the shoe on the sole, or the in- troduction of gravel or stones between the sole and the shoe. The modes of cure in this disease are various ; by some the mild or stimulating plan, by others the caustic or sloughing one. They are both excellent, and, so far as can well be the case, satisfactory. PRICK, OR WOUND IN THE SOLE OK CRCST. 419 The former is thus described by Mr. Newport, in the first volume of the Veterinarian ' : — ' After the shoe has been removed, thin the sole tmtil it will yield to the pressure of the thumb ; then cut the under parts of the wall in an oblique direction from the heel to the anterior part, immediately under the seat of complaint, and only as far as it extends, and rasp the side of the wall thin enough to give way to the pressure to the over-dis- tended parts, and put on a bar-shoe rather elevated from the frog. Ascertain with a probe the direction of the sinuses, and introduce into them a saturated solution of sulphate of zinc, by means of a small syringe. Place over this dressing the common cataplasm, or the turpentine oint- ment, and renew the application every twenty-four hours. I have fre- quently found three or four such apphcations complete a cure. I should recommend that when the probe is introduced, in order to ascertain the progress of cure, that it be gently and carefully used, otherwise it may break down the new-formed lymph. I have found the solution very valuable, where the synovial fluid has escaped, but not to be used if the inflammation of the parts is great.' The latter is thus given by '^Ir. Percivall in his ' Hippopathology.' Mr. Percivall says : — ' The ordinary mode of cure consists in the intro- duction of caustic into the sinus ; and so long as the cartilage presei-ves its integiity — by which I mean, is free from caries — this is perhaps the most prompt and eSectual mode of proceeding. The fan-ier's practice is to mix about half a drachm of corrosive sublimate in powder with tvrice or thrice the quantity of flour, and make them into a pa^te with water. This he takes up by Httle at a time with the point of his probe, and works it about in the sinus until the paste appears rising in the orifice above. After this is done, he commonly has the horse walked about for an hour or two, or even sent to slow work again, which produces a still more efiectual solution of the caustic, at the same time that it tends greatly to its uniform and thorough diffusion into every recess and T\-inding of the sinus. The consequence of this sharp caustic dressing is a general slough from the sinus. Every part of its anterior surface is destroyed, and the dead particles become agglutinated, and cast off along with the discharges in the form of a dark firm curdled mass, which the farrier calls the core ; and so it commonly proves, for granulations follow close behind it, and fill up the sinus.' PRICK, OR WOUND IN THE SOLE OR CRUST. This is the most frequent cause of quittor. It is evident that the sole is very liable to be wounded by nails, pieces of glass, or even sharp flints. Every part of the foot is subject to injuries of this description. The usual place at which these wounds are found is in the hollow between the bars and the frog, or in the frog itself. In the fore-feet the injury will be generally recognised on the inner quarter, and on the hind-feet near the toe. In fact these are the thinnest parts of the fore and hind-feet. Much more frequently the laminEe are wounded by the nail in shoeing : or if the nail does not penetrate through the internal surface of the crust, it is driven so close to it that it presses upon the fleshy parts beneath, and causes frritation and inflammation, and at length suppuration. When a horse becomes suddenly lame, after the legs have been carefully examined, and no cause of lameness appears in them, the shoe should be taken ofi". In many cases the ofiending substance will be immediately detected, or the additional heat felt in some parts of the foot will point out the seat of injury ; or, if the crust is rapped with the hammer all round, the flinching of the horse will discover it ; or pressure -with the pincers wil) render it evident. E E 2 ,20 PRICK, OR WOUND IN THE SOLE OR CRUST. WTien the shoe is removed for this examination, the smith should never be permitted to wrench it off, but each nail should be drawn separately, and examined as it is drawn, when some moisture appearing upon it will not unfrequently reveal the spot at which matter has been thrown out. Sudden lameness occurring within a few days after the horse has been shod, will lead to the suspicion that the smith has been in fault ; yet no one who considers the thinness of the crusty and the difficulty of shoeing many feet, will blame him for sometimes pricking the animal. His fault T\nll consist in concealing or denying that of which he will almost alwaj^s be aware at the time of shoeing, from the flinching of the horse, or the dead sound, or the peculiar resistance that may be noticed in the driving of the nail. "We would plead the cause of the honest portion of an humble class of men, who discharge this naechanical part of their business Tvith a skill and good fortune scarcely credible ; but we resign those tc the reproaches and the punishment of the owner of the horse, who too often, and with bad policy, deny that which accident, or possibly momentary carelessness, might have occasioned, and the neglect of which is fraught with danger, although the mischief resulting from it, might at the time have been easily remedied. ^Hien the seat of mischief is ascertained, the sole should be thinned round it, and at the nail-hole, or the puncture, it should be pared to the quick. The escape of some matter will now probably toll the nature of the injury, and remove its consequences. If it be puncture of the sole effected by some nail, or any similar body, picked up on the road, all that will be necessary is a little to enlarge the opening, and then to place on it a pledget of tow dipped in Friar's balsam, and over that a little common stopping. K there is much heat and lameness, a poultice should be applied. The part of the sole that is wounded and the depth of the wound should be taken into consideration. A deep puncture towards the back part of the sole, and penetrating even into the sensitive frog, may not be pro- ductive of serious consequence. There is no great motion in the part, and there are no tendons or bones in danger. A puncture near the toe may not be followed by much injury. There is little motion in that part of the foot, and the internal sole covering the coffiji-bone will soon heal. A puncture, however, about the centre of the sole may wound the flexor tendon where it is inserted into the coffin-bone, or may even penetrate the joint which unites the navicular bone with the coffin-bone, or pierce through the tendon into the joint which it forms with the navicular bono, and a degTee of inflammation may ensue, that, if neglected, may be fatal. Many horses have been lost by the smallest puncture of the sole in these dangerous points. All the anatomical skill of the veterinarian should be called into requisition, when he is examining the most trifling wound of the loot. If the foot has been wounded by the wrong direction of a nail in shoe- ing, and the sole is well pared out over the part on the first appearance of lameness, little more will be necessary to be done. The opening should be somewhat enlarged, the Friar's balsam applied, and the shoe tacked on, with or withovit a poultice, according to the degree of lameness or heat, and on the following day all will often be well. It may, however, be pnadent to keep the foot stopped for a few days. If the accident has been neglected, and matter begins to be formed, and to be pent up and to press on tlie neighbouring parts, and the horse evidently suffers extreme pain, and is sometimes scarcely able to put his foot to the ground, and much matter is poured out when the opening is enlarged, further precautions nmbt be adopted. The fact must be recollected that the living and dead CORNS. 421 horn will never unite, and every portion of the homy sole that has sepa- rated from the fleshy sole above must be removed. The separation must be followed as far it reaches. Much of the success of the treatment depends on this. No small strip or edge of separated horn must be suffered to press upon any part of the wound ; some soft tow, di2:>ped in Fi-iar's balsam, being spread on the part, the foot stopped, and a poultice placed over all if the inflammation seems to require it. Ou the following day a thin pelHcle of horn will frequently be found over a part or the whole of the wound. If there is an appearance of fungus sprouting from the ex- posed surface, the application of a caustic such as rutric acid may be necessary, the tow being again placed over it, so as to afford considerable yet unifonn pressure. Many days do not often elapse before the new horn covers the whole of the wound. In these extensive openings the Friar's balsam will not always be successful, but if not, the cure must be effected by the judicious and never-too- severe use of the caustic. A dose of physic will be resorted to as a useful auxiliary when much inflamma- tion arises. In searching the foot in order to ascertain the existence of prick, there is often something very censurable in the carelessness with which the horn is cut away between the bottom of the crust and the sole, so as to leave httle or no hold for the nails, although some months must elapse before the horn will grow down suflBciently far for the shoe to be securely fastened. When a free opening has been made below, and matter has not broken out at the coronet, it will rarely be necessary to remove any portion of the horn at the quarters, although he may be able to ascertain by the use of the probe that the separation of the crust extends for a considerable space above the sole. CORNS. In the angle between the bars (c, p. 395) and the quarters, the horn of the sole has sometimes a red appearance, and is more spongy and softer than at any other part. The horse flinches when this portion of the horn is pressed upon, and occasional or permanent lameness is produced. This disease of the foot is termed corns : bearing this resemblance to the com of the human being that it is produced by pressure, and is a cause of lameness. When corns are neglected, so much inflammation is produced in that part of the sensitive sole that suppuration follows, and the matter either undermines the homy sole, or is discharged at the coronet. The pressure hereby produced manifests itself in various ways. When the shoe is suffered to remain on too long, it becomes imbedded in the heel of the foot ; the external crust grows down on the outside of it, and the bearing is thrown on tliis angpilar portion of the sole. No part of the sole can bear pressure, and inflammation and corns are the result. From the length of wear the shoe sometimes becomes loosened at the heols, and gravel insinuates itself between the shoe and the crust, and accumulates in this angle, and sometimes seriously wounds it. The bars are too frequently cut away, and then the heel of the shoe must be bevelled inward, in order to answer to this absurd and injurious shaping of the foot. By this slanting direction of the heel of the shoe inward, an tumatural disposition to contraction is given, and the sole must suffer in two ways, — in being pressed upon by the shoe, and squeezed between the outer crust and the external portion of the bar. The shoe is often made unnecessarily narrow at the heels, by which this angle, seemingly less dis- posed to bear pressure than any other part of the foot, is exposed to acci- dental bruises. If, in the paring out of the foot, the smith should leave i-r2 CORNS. the bars prominent, he too frequently neglects to pare away the horn in the angle between the bars and the external crast ; or if he cuts away the bars, he scarcely touches the horn at this point ; and thus, before the horse Lias been shod a fortnight, the shoe rests on this angle, and produces corns. The use of a shoe for the fore-feet, thickened at the heels, is, and especially in weak feet, a source of corns, from the undue bearing there is on the hoels, and the concussion to which they are subject. The unshod colt rarely has corns. The heels have their natural power of expansion, and the sensitive sole at this part can scarcely be imprisoned, while the projection of the heel of the crust and the bar is a sufficient defence from external injuiy. Corns seem to be the almost inevitable con- sequence of shoeing, which, by limiting, or in a manner destroying, the expansibility of the foot, must, when the sole attempts to descend, or the coffin-bone has a backward and a downward direction, imprison and injure this portion of the sole. Tliis evil consequence is increased when the shoe is badly formed, or kept on too long, or when the paring is omitted or injudiciously extended to the bars. By this imnatural pressure of the sole, blood is thrown out, and enters into the pores of the soft and diseased horn which is then secreted ; therefore the existence and the extent of the corn is judged of by the colour and softness of the horn at this place. Corns are most frequent and serious in horses with thin horn and flat soles, and low weak heels. And the cause in these cases is an external one, namely, undue pressure from the heel of the shoe. But they are found occasionally in high, strong, contracted feet, and in these they are not produced by the heel of the shoe, but by the concussion produced by the superincumbent weight jarring against the hard, thick, unnaturally concave horny sole below. They generally occur on the inside heel, from its being more under the centre of gravity, and consequently having greater weight thro-\vn on that part. The method adopted by shoeing- smiths to ascertain the existence of corn by the pain evinced when they pinch the bar and crust with tlieii- irons, is very fallacious. If the horn is naturally thin, the horse will shrink under no great pressure, although he has no com, and occasionally the bars are so strong as not to give way under any pressure. The cure of old corns is difficult ; recent corns, however, wdll generally yield to good shoeing. The first thing to be done is well to pare out the angle between the crust and the bars. Two objects are answered by this : the extent of the disease wiU be ascertained, and one cause of it removed. A very small di"awing-knife must be used for this purpose. The corn must be pared out fo the very bottom, taking care not to wound the sole. It may then be discovered whether there is only effusion of blood or matter underneath. K this is suspected, an opening must be made through the horn, the matter evacuated, the separated horn taken away, the coui'se and extent of the sinuses explored, and the treatment recommended for quitter adopted. In bad cases a bar-shoe may be put on, so chambered that there shall be no pressure on the diseased part. This may be worn for one or two shoeings, but not constantly, for there are few frogs that would bear the constant pressure of the bar-shoe : and the want of pressure on the heel, generally occasioned by their use, would produce a softened and bulbous state of the heels, that would of itself be an inevitable source of lameness. Mi\ Spooner, of Southampton, very properly states, that the corns occasionally fester, and the purulent matter which is secreted, having nc THHUSII. 4-23 lependont orifice, ascends, torturing the animal to a dreadi'ul extent, and breaks ont at tlie coronet. These cases are very troublesome. Sinuses ire formed, and the evil may end in quittor. A large and free dependent orifice must then be made, and a poultice applied ; to which should succeed a solution of sulphate of zinc, with the application of the compound tar ointment. Tlie cause of com is a most important subject of enquiiy, and which a careful examination of the foot and the shoe ynM easily discover. The cause being ascertained, the effect may, to a great extent, be afterwards removed. Turning out to grass, after the horn is a httle grown, first with a bar-shoe, and afterwards with the shoe nailed on the outside, or with tips, "will often be serviceable. A horse that has once had corns to any considerable extent should, at every shoeing, have the seat of com well pared out, and the butyr of antimony applied. The seated shoe (hereafter to be de- scribed) should be used, with a web sufficiently thick to cover the place of corn, and extending as far back as it can be made to do without injury to the frog. Low weak heels should be rarely touched with the knife, or anything more be done to them than lightly to rasp them, in order to give them a level surface. The inner heel should be particularly spared. Corns are seldom found in the hind-feet, because the heels are stronger, and the feet are not exposed to so much concussion ; and when they are found there, they are rarely or never productive of lameness. There is nothing perhaps in which the improvement in the veterinary art has reheved the horse from so much suffering as shoeing. THRUSH. This is a discharge of ofiensive matter from the cleft of the frog. It is inflammation of the lower surface of the sensitive frog, and during which pus is secreted together with, or instead of horn. When the frog is in its sound state, the cleft sinks but a httle way into it ; but when it becomes contracted or otherwise diseased, it extends in length, and penetrates even to the sensitive laminte within, and through this unnaturally deepened fissure the thnishy discharge proceeds. A plethoric state of the body may be a predisposing cause of thrush, but the immediate and grand cause is moisture. This should never be forgotten, for it will lead a great way towards the proper treatment of the disease. K the feet are habitually covered "svith any moist application — his standing so much on his o^ma dung is a fair example— thrush will inevitably appear. It is caused by anything that interferes with the healthy structure and action of the frog. "We find it in the hinder feet offcener and worse than in the fore, because in our stable management the hinder feet are too much exposed to the per- nicious efiects of the dung and the urine, moistening, or as it were mace- rating, and at the same time irritating them. The distance of the hinder feet from the centre of the circulation would also, as in the case of grease, more expose them to accumidations of fluid, and discharges of this kind. In the fore-feet, thrushes are usually connected with' contraction. We have stated that they are both the cause and the effect of contraction. The pressure on the frog from the wiring in of the heels will produce pain and inflammation : and the inflammation, by the increased heat and suspended function of the part, will dispose to contraction. Horses of all ages, and in almost all situations, are subject to thrush. The unshod colt is frequently thus diseased. Thrushes are not always accompanied by lameness. In a great many 3ascs the appearance of the foot is scarcely or not at all altered, and the disease can only be detected by close examination, or the peculiar smell of 4-24 THRUSH. the discliarge. Tlie frog may not appear to be rendered in tlie slightest deoree tender by it, and therefore the horse may not be considered by many as unsound. Every disease, however, should be considered as legal un- soundness, and especially a disease which, although not attended with present detriment, must not be neglected, for it will eventually injure and lame the horse. All other things being right, a horse should not be rejected because he has a slight thrush, for if the shape of the hoof is not altered, experience tells us that the thrush is easily removed ; but if this is not soon done, the shape of the foot and the action of the horse vv-ill be altered, and manifest unsoundness wall result. A favourite hobby of the late talented Professor Coleman was that pressure on the frog was the only one thing needful to prevent contraction and thrush, and to such an extent did he carry out tliis idea, that he took out a patent for a shoe to cover the toe of the foot only, with a bar projecting back to cover the frog and receive the weight of the animal : this proved to be an utter fallacy, and was very soon abandoned. A clever modification of the same idea has lately emanated from a very talented amateur holding an important position, and this is, that a thin plate of wood or gutta percha should be appHed to the frog in the stable, one end, the narrow one, being secured under the toe of the shoe, and the other, the broad one, tied round the hock. This is certainly a much more possible and practicable propo- sition than that of the late Professor. The progress of a neglected thrush, although sometimes slow, is sure. The frog begins to contract in size — it becomes rough, ragged, brittle, tender — the discharge is more copious and more offensive — the horn o-radually disappears — a mass of hardened mucus usurps its place — this easily peals off, and the sensitive frog remains exposed ; the horse cannot bear it to be touched — fungous granulations spring from it — they spread around — the sole becomes under-run, and canker steals over the greater part of the foot. There are few errors more common or more dangerous than this, that the existence of thrush is a matter of Httle consequence, or even, as some suppose, a benefit to the horse — a dischai'ge for superabundant humours — and that it should not be di-ied up too quickly, and in some cases not dried up at all. If a young colt, fat and full of blood, has a bad thrush, with much discharge, it -will be prudent to accompany the attempt at cure by a dose of physic or a course of diuretics. A few diuretics maj not be injurious when we are endeavouring to dry up thrash in older horses ; but the disease can scarcely be attacked too soon, or subdued too rapidly, and especially when it steals on so insidiously, and has such fatal consequences in its train. If the heels once begin to contract through the baneful effects of thrush, it will, vsdth difficulty, or not at all, be afterwards removed. There are many recipes to stop a running tlirTjsh. Almost every appHcation of an astringent, but not of too caustic nature, will have the effect ; the best for ordinary use will be found to be the sulphate of zinc, or white vittiol and tar ointment. The zinc should be finely pow- dered, and used in the proportion of a drachm to one ounce of the oint- ment; a small pledget of tow, moistened with this, should be hghtly introduced into the cleft of the frog every evening. The common ^gyptiacum (vinegar boiled with honey and verdigrease) is a good lini- ment; but the most effectual and the safest — drying up the discharge speedily, but not suddenly — is a paste composed of blue vitriol, tar, and lard, in proportions according to the virulence of the thrash. A pledo^et of tow covered with it should be introduced as deeply as pos- sible, yet without force, into the cleft of the frog evei'v night, and remove** CANKER. 42& m the morning before the horse goes to work. Attention should at the Bame time, as in other diseases of the foot, be paid to the apparent cause of the complaint, and that cause should be carefully ob\-iated or removed. Before the application of the paste, the frog should be examined, and eveiy loose part of the horn or hardened discharge removed ; and if much of the frog is then exposed, a larger and wider piece of tow covered with the paste may be placed over it, in addition to the pledget introduced into the cleft of the frog. It will be necessary to preserve the frog moist while the cure ia in progress, and this may be done by filling the feet with tow covered by common stopping, or using the felt pad, likewise covered with it. Turning out would be prejudicial rather than of benefit to thrushy feet, except the dressing is continued, and the feet defended fi-om moisture. CANKER Is a separation of the horn from the sensitive part of the foot, and the sprouting of fungous growths instead of it, occupying a portion or even the whole of the sole and frog. Nor do these constitute the only seats of its devastations ; it turns over the lower edge of the foot, and insidiously creeps up the front or sides, disorganising the laminse in its progress, and this in some cases to such an extent that the connection between the sensitive and insensitive laminte is entirely destroyed, and the hoof may drop from the foot on the road or in the stable. It is the occasional con- sequence of bniise, puncture, corn, quittor, and tlirush, and is exceed- ingly difiicult to cure. It is more frequently the consequence of neglected thrush than of any other disease of the foot, or rather it is thrush in- volving the frog, the bars, and the sole, and making the foot one mass of disease. Although canker is often the result of neglected thrush, it is distin- guished from it by its mahgnant nature, and the great tendency to the formation of fungoid growths ; the latter are not found in ordinary thrush. It is offcenest found in, and is almost peculiar to the heavy breed of cart horses, and partly resulting from constitutional predisposition. Horses ^^'ith white legs and thick skins, and much hair upon their legs, — the very character of many dray horses, — are subject to canker, especially if they have had an attack of grease, or their heels are habitually thick and greasy. The disposition to canker is certainly hereditary. The dray horse likewise has this disadvantage, that in order to give him foot-hold, it is sometimes necessary to raise the heels of the hinder feet so hio-h, that aU pressure on the frog is taken away ; its functions are destroyed, and it is rendered hable to disease. Canker, however, arises most of all from the neglect of the feet and the filthiness of the stable in these establishments. Although canker is a disease most difficult to remove, it is easily pre- vented. Attention to the punctures to which these heavy horses, with their clubbed feet and brittle hoofs, are more than any others subject in shoeing, and to the bruises and treads on the coronet, to which from their awkwardness and weight they are so liable, and the greasy heels which a very sUght degree of negligence will produce in them, and the stopping of the thrushes, which are so apt in them to run on to the separation of the horn from the sensitive frog, will most materially lessen the number of cankered feet. Where this disease often occurs, the owner of the team may be well assured that there is mismanagement either in himself or his horsekeeper, or the smith, and it will rarely be a difficult matter to detect the precise nature of that mismanagement. The cure of canker is the business of the vetei-inary surgeon, and a 4-J6 OSSIFICATION OF THE CARTILAGES. (SIDE-BONES.j most painftil and tedious business it is. Tlie principles on which he pro- ceeds are, first of all, to remove the extraneous fungous growth, and for this purpose he will need the aid of the knife and the caustic, or the cautery, for he should cut away every portion of horn which is in the sb'ghtest degree separated from the sensitive pai-ts beneath. He will have to discourage the growth of fresh fungus, and to bring the foot into that «tate in which it will again secrete healthy horn. Here he will remembei that he has to do with the surface of the foot ; that this is a disease of the surface only, and that there vnll be no necessity for those deeply-corroding and torturing caustics which penetrate to the very bone. A slight and daily appHcation of nitric acid, and that not where the new horn is form- ing, but on the surface which continues to be diseased, and accompanied by as firm but equal pressure as can be made — the carefiil avoidance ot the slightest degree of moisture — the horse being exercised or worked in the mill, or wherever the foot will not be exposed to wet, and that exer- cise adopted as early as possible, and even from the beginning, if the malady is confined to the sole and frog — these means will succeed if the disease is capable of cure. Humanity, perhaps, will dictate, that, con- sidering the long process of cure in a cankered foot, and the daily torture of the caustic, and the suffering which would otherwise result from so large or exposed a surface, the nerves of the leg should be divided in order to take away the sense of pain ; and also to induce the animal to place the foot freely to the ground, and thus produce that pressure which is so essential to reduce these fungoid growths. But this will rarely be neces- sary, inasmuch as it is a disease which does not generally cause much pain. It sometimes assumes a very malignant form, and extends rapidly, implicating the coffin-bone and other parts of the foot. In this stage of the disease, aU attempts at cure will be fruitless, and the animal should be destroyed. Medicine is not of much avail in the cure of canker. It is a local disease ; or the only cause of fear is, that so great a determination of blood to the extremities having existed during the long progress of cure, it may in some degree contiuue, and produce injury in another form. It may, therefore, be prudent, when the cure of a cankered foot is nearly effected, to subject the horse to a course of alteratives or diuretics. OSSIFICATION OF THE CARTILAGES. ( SIDE-BONES.) Mention has been made of the side or lateral cartilages of the foot, occupying a considerable portion of the external side and back part of the foot. They are designed to prevent concussion and preserve the expansion of the upper pai-t of the foot, and especially when that of the lower part is limited or destroyed by careless shoeing. These cartil- ages are subject to inflammation, and the result of that inflammation is, that the cartilages are absorbed, and bone substituted in their stead. This ossification of the cartilages frequently accompanies ringbone, but it may exist without any affection of the pastern joint. It is oftenest found in horses of heavy draught. Very few heavy di-aught horses arrive at old age without this change of structure ; and particularly if they are much employed in the paved streets. The change commences sometimes at the anterior part of the cartilage, but much oftcner at the posterior and inferior part. There are few diseases in which the influence of hereditary pre- disposition is more apparent than in connection with ossification of the lateral caa-tilages. So much does this prevail in some districts, and especially in the midland counties, that it is somewhat difficult to find a cart-horse eight or nine years old without more or less ossification of the WEAKNESS OF THE FOOT. 427 :;artilages. Tlie extent to wliich this disease exists in these districts from the continued pernicious system of breeding from parents affected with it, ^vill render its removal, even with the most careftil attention to breeding, a matter attended with much difficulty, and extending over a considei'able time. Although side-bones, as the result of hereditary predisposition, do not as a rule cause lameness, or materially deteriorate the usefulness of the agi'icultural horse, it should be remembered by the breeder that it is a disease which renders the animal unsound, and consequently consider- ably reduces his commercial value. Concussion is the most frequent ex- citing caiise of ossification of the cartilage. ' From the combined opara- tion ' (says Mr. W, Spooner, in his work on the ' Foot of the Horse ') ' of great weight and high action, the feet, and particularly the heels, come with gi'eat force on the ground. The cartilages, being embedded in the heels of the feet, are, therefore, the parts that receive the greatest degree of concussion, the consequence of which is that subacute inflammation is set up, and the secreting vessels deposit ossific instead of cartilaginous matter, in the room of that which is absorbed in the usual process of nature.' It sometimes arises from direct injury to the parts, such as over-reach. "Wlien the result of the latter, the ossification is confined to the injured cartilage. Side-bones are more frequently met with in the fore than in the hind-feet, but when hereditary, all the feet will not unfrequently be found affected. No evident inflammation of the foot, or great, or perhaps even per- ceptible lameness, accompanies this change ; a mere shght degTee of stiJffness may have been observed, which, in a horse of more rapid pace, would have been lameness. Even when the change is completed, there is not in any cases anything more than a slight increase of stifl"ness, little, or not at all, interfering vrith the usefulness of the horse. When this altered structure appears in the lighter horse, the lameness is more decided, and means should be taken to arrest the progress of the change. These are bhsters or firing ; but after the parts have become bony, no operation will restore the cartilage. When the ossific deposit is thrown out on one side of the foot only, which not unfrequently occurs, the operation of neurotomy on the affected side will, as has been before stated, be found a very valuable remedy. Connected with ringbone the lameness may be very great. This has been spoken of. WEAKNESS OP THE FOOT. This is more accurately a bad formation than a disease ; often, indeed, the result of disease, but in many instances the natural construction of the foot. The term iceah foot is familiar to every horseman, and the con- sequence is too severely felt by all who have to do wdth horses. In the slanting of the crust from the coronet to the toe, a less angle is almost invariably formed, amounting probably to not more than forty instead of forty-five degrees ; and after the horse has been worked for one or two years, the line is not straight, but a Httle indented or hollow, midway between the coronet and the toe. This has been described as the accom- paniment of pumiced feet, but it is often seen in weak feet, that, although they might become pumiced by severity of work, do not otherwise have the sole convex. The crust is not only less oblique than it ought to be, but it has not the smooth even appearance of the good foot. The surface is sometimes irregularly roughened, but it is much oftener roughened in circles or rings. The form of the crust likewise presents too much the appearance of a cone ; the bottom of the foot is unnaturally wide in ♦•2S WEAKNESS OF THE FOOT. proportion to the corouet ; and the whole of the foot is generally, buL not always, larger than it should be. "WTien the foot is lifted, it will often present a round and circular ri,ppearance, with a fulness of frog that would mislead the inexperienced, and indeed be considered as almost the perfection of structure ; but, beino* examined more closely, many glaring defects will be seen. The sole is 5at, and the smith finds that it will bear little or no paring. The bars are email in size. They are not cut away by the smith, but they can be scarcely said to have any existence. The heels are low, so low that the very coronet seems almost to touch the ground ; and the crust, if examined, appears scarcely thick enough to hold the nails. Horses with these feet can never stand much work. They will be subject to corns, to bruises of the sole, to convexity of the sole, to punc- tures in nailing, to breaking away of the crust, to inflammation of the foot, and to sprain and injury of the pastern, and the fetlock, and the flexor tendon. These feet admit of little improvement. Shoeing as seldom as may be, and with a light and yet concave web and leather soles : little or no parinc at the time of shoeing, and as little violent work as possible, and especially on rough roads, may protract for a long period the evil day, but he who buys a horse with these feet will sooner or later have cause to repent his bargain. Management of the Feet. — This is a part of stable management that is often sadly neglected by the carter and groom. The feet should be carefully examined every morning, for the shoes may be loose, and the horse would have been stopped in the middle of his work ; or the clenches may be raised, and endanger the wounding of his legs ; or the shoe may begin to press upon the sole or the heel, and bruises of the sole, or corn, may be the result ; and, the horse having stood so long in the stable, every little increase of heat in the foot, or lameness, will be more readily detected, and serious disease may often be prevented. When the horse comes in at night, and after the harness has been taken ofi" and stowed away, the heels should be well brushed out. Hand- rub- bing will be preferable to washing, especially in the agricultural horse, whose heels, covered with long hair, can scarcely be dried again. If the dirt is suffered to accumulate in that long hair, the heels will become sore, and grease will follow ; and if the heels are washed, and particularly during the winter, grease will result from the coldness occasioned by the slow evaporation of the moisture. The feet should be stopped — even the feet of the farmer's horse, if he remains in the stable. Very Httle clay should be used in the stopping, for it will get hard and press upon the sole. Cow- dung is the best stopping to preserve the feet cool and elastic ; but, before the stopping is applied, the picker should be run round the whole of the foot, between the shoe and the sole, in order to detect any stone that may have insinuated itself there, or a wound on any other part of the sole. For the hackney and hunter, stopping is indispensable. After several days' hard work, it will aff'ord very great relief to take the shoes off", having put plenty of litter under the horse, or to turn him, if possible, into a loose-box ; and the shoes of every horse, whether hardly worked or not, should be removed or changed once in every three weeks. ON SHOEING. 4'i9 CHAPTER XX. ON SIIOEIXG. The period when the shoe began to be nailed to the foot of th^ horse is uncertain. William the Norman introduced it into our country. "We have seen, in the progress of our inquiry, that, while it affords to the foot of the horse that defence which seems now to be necessary against the destructive effects of our artificial and flinty roads, it has entailed on the animal some evils. It has limited or destroyed the beautiful expansi- bility of the lower part of the foot — it has led to contraction, although that contraction has not always been accompanied by lameness — in the most careful fixing of the best shoe, and in the carel&ss manufacture and setting on of the bad one, irreparable injury has occasionally been done to the horse. We will first attend to the preparation of the foot for the shoe, for more than is generally imagined, of its comfort to the horse, and its safety to the rider, depends on this. If the master would occasionally accompany the horse to the forge, more expense to himself and punishment to the horse would be spared, than, perhaps, he would think possible, provided he will take the pains to understand the matter himself, otherwise he had better not interfere. The old shoe must be first taken off. We have something to observe even here. The shoe was retained on the foot by the ends of the nails being tAvisted off, turned down, and clenched. These clenches should be first raised, which the smith seldom takes the trouble thoroughly to do ; but after looking carelessly round the crust and loosening one or two of the clenches, he takes hold first of one heel of the shoe, and then of the other, and by a violent wrench separates them from the foot ; then, by means of a third wrench, applied to the middle of the shoe, he tears it off. By these means he must enlarge every nail-hole, and weaken the future and steady hold of the shoe, and sometimes tear off portions of the crust, and otherwise injure the foot. The horse generally shows by his flinching that he suffers from the violence with which this preliminary operation too often is performed. The clenches should always be raised •off; and, where the foot is tender, or the horse is to be examined for lame- ness, each nail should be partly punched out. According to the common system of procedure, many a stub is left in the crust, the source of future annoyance. The shoe having been removed, the smith proceeds to rasp the edges of the crust. Let not the stander-by object to the apparent violence which he uses, or fear that the foot will suffer. It is the only means that he has to detect whether any stubs remain in the nail-holes ; and it is the most con- venient method of removing that portion of the crast into which dirt and gravel have insinuated themselves. Next comes the important process of paring out, with regard to which it is almost impossible to lay down any specific rules. This, however, is undoubted, that far more injury has been done by the neglect of paring than by carrying it to too great an extent. The act of paring is a work of much more labour than the proprietor of the horse often imagines. The smith, except he is overlooked, will frequently give himself as little trouble about it as he can ; and that portion of horn which, in the unshod foot, ve the other, will painfally convince us of what the horse must sufibr CLIPS. — DIFFERENT KINDS OF SHOES 433 from this too common method of shoeing. It cannot be exciised even in the hunting shoe. If the horse is ridden far to cover, or galloped over much hard and flinty ground, he will inevitably suffer from this unequal distribution of the weight. If the calkin is put on the outer heel, in order to prevent the horse from shpping, either the horn of that heel should be lowered to a corresponding degree, or the other heel of the shoe should be raised to the same level by a gradual thickening. Of the use of calkins in the hinder foot we shall presently speak. CLIPS. These are portions of the upper edge of the shoe, hammered out, and turned up so as to embrace the lower part of the crust, and which is usually pared out a little, in order to receive the chp. They are very use- ful, as more securely attaching the shoe to the foot, and reheving the crust from that stress upon the nails which would otherwise be injurious. A clip at the toe is almost necessary in every di"aught horse, and absolutely so in the horse of heavy draught, in order to prevent the shoe from being loosened or torn off by the pressui'e which is thrown upon the toe in the act of drawing. A cHp on the outside of each shoe, at the beginning of the quarters, will give security to it. CHps are likewise necessary on the shoes of all heavy horses, and of all others who are disposed to stamp, or violently paw with their feet, and thus incur the danger of displacing the shoe ; but they are evils, inasmuch as they press upon the crust as it grows down, and they should only be used when circumstances absolutely require them. In the hunter's shoe they are not required at the sides. One at the toe is sufficient. THE HINDER SHOE. In forming the hinder shoes it should be remembered that the hind limbs are the principal instruments in progression, and that in every act of pro- gression, except the walk, the toe is the point on which the whole frame of the animal turns, and from which it is propelled. This part, then, should be strengthened as much as possible ; and, therefore, the hinder shoes are made thicker at the toe than the fore ones. Another good effect is pro- duced by this, that, the hinder foot being shortened, there is less danger of overreaching or forging, and especially if the shoe is wider on the foot sur- face than on the ground one. The shoe is thus made to slope inward, and is a little within the toe of the crust. The shape of the hinder foot is somewhat different from that of the fore foot. It is straighter in the quartei-s, and the shoe must have the same form. For carriage and draught horses generally, calkins may be put on the heels, because the animal will be thus enabled to dig his toe more firmly into the ground, and urge himself forward, and throw his weight into the collar with gTeater advantage : but the calkins must not be too high, and they must be of an equal height on each heel, otherwise, as has been stated with regard to the fore feet, the weight will not be faii'ly dis- tributed over the foot, and some part of the foot or the leg will materially suffer. The nails in the hinder shoe may be placed nearer to the heel than in the fore shoe, because, from the comparatively little weight and concussion throvsTi on the hinder feet, there is not so much danger of contraction. DIFFERENT KINDS OF SHOES. The shoe must vary in substance and weight with the kind of foot, and the nature of the work. A weak foot should never wear a heavy shoe, nor any foot a shoe that will last longer than a month. Here, perhaps, we 434 THE CONCAVE-SEATED SHOE, may be permitted to caution tlie horse-proprietor against having his cattle shod by contract, unless he binds down his farrier or veterinary surgeon to remove the shoes once at least in every month ; for if the contractor, by a heavy shoe, and a little steel, can cause five or six weeks to intervene be- tween the shoeings, he will do so, although the feet of the horse must necessarily suffer. The shoe should never be heavier than the work requires, for an ounce or two in the weight of the shoe will sadly tell at the end of a hard day's work. This is acknowledged in the hunting shoe, which is narrower and lighter than that of the hackney, although the foot of the haokney is smaller than that of the hunter. It is more decidedly acknowledged in the racer, who wears a shoe only sufiiciently thick to prevent it from bending when it is used. THE CONCAVE-SEATED SHOE. The proper form and construction of the shoe is a subject deserving of very serious enquiry, for it is most important to ascertain, if possible, the kind of shoe that will do the least mischief to the feet. A cut is subjoined of that which is useful and valuable for general purposes. It is employed in many of our best forges, and promises gradually to supersede the flat and the simple concave shoe. It presents a perfectly flat surface to the ground, in order to give as many points of bearing as possible, except that, on the outer edge, there is a groove of fuller, in which the nail-holes are punched, so that, sinking into the fuller, their heads project but a little way, and are soon worn down level with the shoe. The ground surface of the common shoe used in the country is somewhat convex, and the inner rim of the shoe comes first on the ground : the consequence of this is, that the weight, instead of being borne fairly on the crust, is supported by the nails and clinches, which must be injurious to the foot, and often chip and break it. The web of this shoe is of the same thickness throughout, from the toe to the heel ; and it is sufficiently wide to guard the. sole from bruises, and, as much so as the frog will permit, to cover the seat of corn. On the foot side it is seated. The outer part of it is accurately flat, and THE UNILATERAL, OR ONE SIDE NAILED SHOE. 436 of the width of tlie cnist, and designed to support the crust, for by it tho whole weight of the horse is sustained. Towards the heel this flattened part is wider and occupies the whole breadth of the web, in order to support the heel of the crust, and its reflected part — the bar : thus, while it defends the horn included within this angle from injury, it gives that equal pressure upon the bar and the crust, which is the best preventive against corns, and a powerful obstacle to contraction. It is fastened to the foot by nine nails — five on the outside, and four on the inner side of the shoe ; those on the outside extending a Httle farther down towards the heel, because the outside heel is thicker and stronger, and there is more nail -hold ; the last nail on the inner quarter being farther from the heel on account of the weakness of that quarter. For feet not too large, and where moderate work only is required from the horse, four nails on the outside, and three on the inside, will be suflicient ; and the last nail being far from the heels, will allow more expansion there. The inside part of the web is bevelled off, or rendered concave, that it may not press upon the sole. Notwithstanding our iron fetter, the sole does, although to a very inconsiderable extent, descend when the foot of the horse is put on the ground. It is unable to bear constant or even occasional pressure, and if it came in contact with the shoe, the sensitive sole between it and the cofl&n-bone would be blTiised, and lameness would ensue. Many of our horses, from too early and undue work, have the natural concave sole flattened, and the disposition to descend and the degree of descent are thereby increased. The concave shoe prevents, even in this case, the possibility of much injury, because the sole can never descend in the degree in which the shoe is or may be bevelled, A shoe bevelled still farther is necessary to protect the projecting or pumiced foot. THE UNILATEEAL, OR ONE SIDE NAILED SHOE. For a material improvement in the art of shoeing, we are indebted to Mr. Turner of Regent Street. What was the state of the foot of the horse a few years ago ? An unyielding iron hoof was attached to it by four nails in each quarter, and the consequence was, that in nine cases out of ten, the foot underwent a very considerable alteration in its form and in its usefulness. Before it had attained its full development — before the animal was five years old, there was, in a great many cases, an evident contraction of the hoof. There was an alteration in the manner of going. The step was shortened, the sole was hollowed, the frog was diseased, the general elasticity of the foot was destroyed — there was a disorganisation of the whole homy cavity, and the value of the horse was materially diminished. What was the grand cause of this ? It was the restraint of the shoe. The firm attachment of it to the foot by nails in each quarter, and the consequent strain to which the quarters and every part of tho foot were exposed, produced a necessary tendency to contraction, from which sprang almost all the maladies to which the foot of the horse is subject. The unilateral shoe has this great advantage : it is identified with the grand principle of the expansibility of the horse's foot, and of removing or preventing the worst ailments to which the foot of the horse is liable. It can be truly stated of this shoe, that while it affords to the whole organ an iron defence equal to the common shoe, it permits, what the common shoe never did or can do, the perfect liberty of the foot. We are enabled to present our readers with the last improvement of the nnilateral shoe. ff2 43G THE UNILATERAL, OR ONE SIDE NAILED SHOE. The first cut gives a view of the outer side of the off or right uni- lateral shoe. The respective situations of the five nails will be observed ; the distance of the last from the heel, and the proper situations at which they emerge from the crust. The two clips will likewise be seen— one in the front of the foot, and the other on the side between the last and second nail. The second cut gives a \'iew of the inner side of the unilateral shoe. The two nails near the toe are in the situation in wliich Mr. Turner directs that they should be placed, and behind them is no other attachment, be- tween the shoe and the crust. The heel of this shoe exhibits the method which Mr. Turner has adopted, and with considerable success, for the cure of coras ; he cuts away a portion of the ground surface at the heel, and all injurious compression or concussion is rendered in a manner im- possible in ordinary cases ; however, Avith the exception of being rathe? thinner the inside heel of the shoe would be the counterpart of the outer. There can be no doubt that this one-sided nailing has been exceedingly nseful. It has, in many a case that threatened a serious termination, lostored the elasticity of the foot, and enabled it to discharge its natural functions. THE HUNTING SHOE. — THE BAR-SHOE. 437 Altliougli tlie unilateral shoe Las still its advocates, they arc few com- pared with the period when it was first introduced. This may be attributed partly to the different views taken with reference to the expansion of the foot, and also from the great difficulty in fixing it securely on the foot. It is an exceedingly useful method of shoeing, in some cases, but for ordi- nary work no shoe equals the ordinary seven-nailed concave-seated shoe. It is difficult to tell what was the character of ' the old English shoe.' It certainly was larger than there was any occasion for it to be, and nearly covered tha lower surface of the foot. The nail-holes were also far more numerous than they are at present. The ground side was usually some- what convex. ' The effect of this,' says Mr. W. C. Spooner, in his treatise on the Foot, ' was to place the foot in a kind of hollow dish, which effectually prevented its proper expansion, the crust resting on a mere ledge instead of a flat surface ; and, on the ground side, from the inner rim coming to the ground first, the weight was almost supported by the nails and cHnches, which were placed, four or five on each side, at soTue distance from the toe, and approaching nearly to the heels.' It was an improvement to make the ground surface flat, and to take care that it did not press on the sole. At length, however, came the concave- seated shoe of Osmer, which was advocated by Mr. Clark of Edinburgh, improved by Mr. Moorcroft, and ultimately became very generally and usefully adopted. THE HUNTING SHOE. The hunter's shoe is different from that commonly used, in form as well as in weight. It is not so much bevelled off as the common concave-seated shoe. Sufficient space alone is left for the introduction of a picker between the shoe and the sole, otherwise, in going over heavy ground, the clay would insinuate itself, and by its tenacity loosen, and even tear off the shoe. The heels likewise are somewhat shorter, that they may not be torn off by the toe of the hind-feet when galloping fast, and the outer heel is frequently but injudiciously turned up to prevent shpping. If calkins are necessary, both heels should have an equal bearing. THE BAE-SHOE. A bar-shoe is often exceedingly useful. It is the common shoe with the heels carried round to meet each other, thus forming a bar, which covers or rests on, as the case may require, the frog, and from whence the name is derived, and by means of it the pressure may be taken off from some tender part of the foot, and thrown on another which is better able to bear it, or more widely and equally diffused over the whole foot. It is principally resorted to iu cases of corn, the seat of which it perfectly covers, — in pumiced feet, the soles of which may be thus elevated above the ground and secured from pressure, — in sand-crack, when the pressure may be removed from the fissure, and thrown on either side of it, — and in thrushes, when the frog is tender, or is become cankered, and requires to be fre- quently dressed, and the dressing can by this means alone be retained. In these cases the bar-shoo is an excellent contrivance, if worn only for one or two shoeings, or as long as the disease requires it to be worn, but it must be left off as soon as it can be dispensed with. If it is used for the protection of a diseased foot, however it may be chambered and laid off the frog, it will soon become flattened upon it ; or if the pressure of it is thrown on the frog, in order to relieve the sand- crack or the com, that frog must be very strong and healthy which can long bear the great and continued pressure. More mischief is often pro- duced in the frog than previously existed ia the part that was relieved. 433 TIPS. THE EXPANDING SHOE. It will be plain tliat in the use of the bar-shoe for corn or sand-crack, tha crust and the frog should be precisely on a level : the bar also should bo the widest part of the shoe, in order to afford as extended a bearing as possible on the frog, and therefore less likely to be injurious. Bar-shoea are evidently not safe in frosty weather. They are never safe when much speed is required from the horse, and they are apt to be wrenched off in a heavy, clayey country. TIPS. Tips are short shoes, reaching only half round the foot, and worn while the horse is at grass, in order to prevent the crust being torn by the occasional hardness of the ground, or the pawing of the animal. The quarters at the same time being free, the foot disposed to contract has a chance of expanding and regaining its natural shape. THE EXPANDING SHOE. Our subject would not be complete if we did not describe the supposed expanding shoe, although it is now almost entirely out of use. It is either seated or concave like the common shoe, with a joint at the toe, by which the natural expansion of the foot is said to be permitted, and the injurious consequences of shoeing prevented. There is, however, this radical defect in the jointed shoe, that the nails occupy the same situation as in the common shoe, and prevent, as they do, the gradual expansion of the sides and quarters, and allow only of a hinge-like motion at the toe. It is a most imperfect accommodation of the expansion of the foot to the action of its internal parts, and even this accommodation is afforded in the slightest possible degree, if it is afforded at all. Either the nails fix the sides and quarters as in the common shoe, and then the joint at the toe is useless ; or, if that joint merely opens like a hinge, the nail-holes near the toe can no longer correspond mth those in the quarters, which are unequally ex- panding at every point. There will be more stress on the crust at these holes, which will not only enlarge them and destroy the fixed attachment of the shoe to the hoof, but often tear away portions of the crust. This shoe, in order to answer the intended purpose, should consist of many joints, running along the sides and quarters, which would make it too complicated and expensive and frail for general use. The introduction of this shoe into general use, was for the greater portion of his life the main object of that very scientific and acute professor of the veterinary art, Mr. Bray Clark, and it is only within these few years, that finding the uncer- tainty of its effects more than negatived its supposed advantages, that he has given it up. While the shoe is to be attached to the foot by nails, wo must be content with the concave-seated or unilateral one, taking care lo place the nail- holes as far from the heels, and particularly from the inner heel, as the state of the foot and the nature of the work will admit ; and where the country is not too heavy nor the work too severe, omitting all but two on the inn side of the foot. FELT OR LEATHER SOLES, When the foot is bruised or inflamed the concussion or shock produced by the hard contact of the elastic iron with the ground gives the animal much pain, and aggravates the injury or disease. A strip of felt or leather, corresponding in shape with the shoe, is therefore sometimes placed between the seating of the shoe and the crust, which, from its elasticity, deadens or materially lessens the vibration or shock, and the horse treads more freely and is evidently relieved. This is a good contrivance while the inflamma- FELT OR LEATHER SOLES. 4a9 fcion 01 tenderness of the foot continues, bnt a very bad practice if constantly adopted. The nails cannot be driven so surely or securely when this sub- stance is interposed between the shoe and the foot. The contraction and swelling of the felt or leather from the effect of moisture or dryness will soon render the attachment of the shoe less firm — there will be too much play upon the nails — the nail-holes will enlarge, and the cnist be broken away. After wounds or extensive bruises of the sole, or where the sole is thin and flat and tender, it is sometimes covered with a piece of leather, fitted to the sole, and nailed on Avith the shoe. This may be allowed as a terc- porary defence of the foot ; but there is the same objection to its permanent use from the insecurity of fastening, and the strain on the crust, and the frequent chipping of it. There are also these additional inconveniences, that if the hollow between the sole and the leather is filled with stopping and tow, it is exceedingly difficult to introduce them so evenly and accurately as not to produce partial or injurious pressure. The long contact of the sole with stopping of almost every kind will produce a healthy, elastic horn, and if the hollow is not thus filled, gravel and dirt will insinuate themselves, and injure the foot. Facts, however, are stubborn things, and it is notorious that there are hundreds of horses doing their daily work over the London stones, with comparative comfort, that otherwise would be actual cripples working in pain and misery. Axiy alleviation to the artificial and laborious hfe of the horse in London and other large cities, must be hailed with satisfaction for its policy and humanity. The general habit of stopping the feet requires some consideration. It is a very good or a very bad practice, according to circumstances. When the sole is flat and thin it should be omitted, except on the evening before shoeing, and then the application of a little moisture may render the paring of the foot safer and more easy. K it were oftener used it would soften the foot, and not only increase the tendency to descent, but the occasional occurrence of lameness from pebbles or irregularities of the road. Professor Stewart gives a valuable account of the proper appHcation of stopping. ' Farm horses seldom require any stopping. Their feet receive sufficient moisture in the fields, or, if they do not get much, they do not need much. Cart-horses used in the to^vn should be stopped every Satur- day night, until Monday morning. Fast going horses should be stopped once a week, or oftener during winter, and every second night in the hot weeks of summer. Groggy horses, and all those with high heels, concave shoes, or hot and tender feet, or an exuberance of horn, require stopping almost every night. When neglected, especially in dry weather, the sole becomes hard and rigid, and the horse goes lame, or becomes lame if he were not so before.' One of two substances, or a mixture of both, is generally used for stopping the feet — clay and cow-dung. The clay used alone is too hard, and dries too rapidly. Many horses have been lamed by it. If it is used in the stable, it should always be removed before the horse goes to work. It may, perhaps, be applied to the feet of heavy draught horses, for it will work out before much mischief is done. Cow-dung is softer than the clay, and it has this good property, that it rarely or never becomes too hard or dry. For ordinary work, a mixture of equal parts of clay and cow-dung will be the best appHcation ; either of them, however, must be apphed with a great deal of caution, where there is any disposition to thrush. Tow used alone, or with a small quantity of tar, will often be serviceable. In the better kind of stables a felt pad is frequently used. It was first introduced by principal Veterinary Surgeon Cherry. It keeps the foot cool 440 THE HORSE SANDAL. and moifet, and is very useful, when the sole has a tendency to become flat. For the concave sole, tow would be preferable. The shoe is sometimes displaced when the horse is going at an ordinary pace, and more frequently during hunting ; and no person who is a sports- man needs to be told in what a vexatious predicament every one feels him- self who happens to lose a shoe in the middle of a chase, or just as tho hounds are getting clear away with their fox over the open country. Mr. Percivall has invented a sandal which occupies a very small space in the pocket, can be buckled on the foot in less than two minutes, and will serve as a perfect substitute for the lost one, on the road or in the field ; or may be used for the race-horse when travelling from one course to another ; or may be truly serviceable in cases of diseased feet that may require at the same time exercise and daily dressing. The following is a short sketch of the horse sandal. Toe-ClasD Middle Bar Side Bar Heel Clip Middle Bar Side Bar Heel CUp Rings From an inspection of this cut it will be seen, that the shoe, or iron part of the sandal, consists of three principal parts, to which the others are appendages ; which are, the tip, so called from its resemblance to the horse-shoe of that name ; the middle oar, the broad part proceeding back- ward from the tip ; and the side bars, or branches of the middle bar, extending to the heels of the hoof. The appendages are, the toe-clasp, the part projecting from the front of the tip, and which moves by a hinge upon the toe-clip, which toe-clasp is furnished with two iron loops. The heel-clips are two clips at the heels of the side bars which correspond to the toe-clip ; the latter embracing the toe of the crust, while the former em- brace its heels. Through the heel-clips run the rings, which move and act like a hinge, and are double, for the purpose of admitting both the straps. In the plate, the right ring only is represented ; the left being omitted, the better to show the heel-clip. The straps, which are composed of web, consist of a hoof^strap and a heel and coronet strap. The hoof-strap is furnished Avitli a buckle, Avhosc office it is to bind the FRACTURES. 441 shoe to the hoof; for which purpose it is passed through the lower rings and both loops of the shoe, and is made to encircle the hoof twice. The heel and coronet strap is furnished %%dth two pads and two sliding loops • one, a moveable pad, reposes on the heel, to defend that part from the pressure and friction of the strap; the other, a pad attached to the Btrap near the buckle, affords a similar defence to the coronet, m front. The heel-strap runs through the upper rings, crosses the heel, and encircles the coronet, and its office is to keep the heels of the shoe closely applied to the hoof, and to prevent them from sliding forward •. j -i In the apphcation of the sandal the foot is taken up with one hand, and the shoe slipped upon it -o-ith the other. With the same hand the shoe is retained in its place, while the foot is gradually let doA^^l to rest on the ground. As soon as this is done, the straps are drawn as tight as possible and buckled. The above cut presents an accurate delineation of the sandal, when properly fastened on the foot. The apphcation of the sandal has recently been considerably simpHfied and improved, the toe-clip has but a single loop, and the heel-chps each a single ring ; a vulcanised mdia-rubber band, which is slipped over the hoof, effectually secures the sandal; the front part of the band is retamed in front of the hoof by the loop of the toe-clip ; the back part being slipped over the heels, prevents all displacement. CHAPTER XXI. FRACTURES. Accidents of this description are not of frequent occurrence, but when they do happen it is not always that the mischief can be repaired ; occa- sionally, however, and much more frequently than is generally imagmed, the life of a valuable animal might be saved if the owner, or the veterinary surcreon, would take a little trouble, and the patient is fairly tractable ; and^'that, in the majority of cases, he will soon become. The number of 442 FRACTURES. valuable animals is far too great that are destroyed under a confused notion of tlie diflEiculties of controlling the patient, or the incurable character of the accident. Messrs. Blaine and Psjrcivall have given a valuable record of the usual cases and treatment of fracture which occur in the practice of the English veterinary surgeon ; and the splendid work of Hurtrel d'Arboval contains a record of all that has been attempted or effected on the Continent. The author of this volume must confine him- self to a rapid survey of that which they have described, adding a few cases that have been brought under his own observation, or communicated to him by others. With the exception of accidents that occur in casting the animal for certain operations, and liis struggles during the operation, the causes of Fractdee are usually blows, kicks, or falls, and the lesion may be con- sidered as simple, confined to one bone, and not protruding through the skin — or compound, the bone or bones protruding through the skin — or comminuted, where the bone is broken or splintered in more than one direction. The duty of the veterinary surgeon resolves itself into the replacing of the displaced bones in their natural position, the keeping of them in that position, the healing of the integument, and the taking of such measures as will prevent any untoward circumstances from afterwards occuri'ing. In the greater number of cases of fracture it will be necessary to place the horse under considerable restraint, and even to suspend or sHng him. The cut in the next page contains a view of the suspensory apparatus used by LIr. Percivall. A broad piece of sail-cloth, furnished with two breechlngs, and two breast-girths, is placed under the animal's belly, and, by means of ropes and pulleys attached to a cross-beam above, he is elevated or lowered as circumstances may require. It will seldom be necessary to hfb the patient quite off the ground, and the horse will be quietest, and most at his ease, when his feet are suffered just to touch it. The head is confined by two collar ropes, and the head-stall well padded. Many horses may plunge about and be difiicult to manage at first, but, generally speaking, it is not long ere they become perfectly passive. The use of the different buckles and straps which are attached to the sail-cloth will be evident on inspection. If the horse exhibits more than usual uneasiness, other ropes may be attached to the comers of the sail- cloth. This will afford considerable reKef to the patient, as well as add to the security of the bandages. In many cases the fracture, although a simple one, may be visible on the slightest inspection ; in others, there may be merely a suspicion of its ex- istence. Here will be exhibited the skill and the humanity of the educated surgeon, or the recklessness and brutality of the empiric. The former will carefully place his patient in the position at once the least painful to the sufferer, and the most commodious for himself. He will proceed with patience, gentleness, and management — no rough handling or motion of the parts, inflicting torture on the animal, and adding to the injury already received. It is interesting to observe how soon the horse compre- hends aU this, and submits to the necessary inspection ; and how complete and satisfactory the examination terminates under the superintendence of the humane and cautious practitioner, while the bnite in human shape fails in comprehending the real state of the case. Heat, swelling, tenderness, fearfulness of the slightest motion, crepitus, and especially change of the natural position of the limb, are the most frequent indications of fracture. It should be laid down as a general rule, that cases of simple fracture only afford a probable chance of cure ; — in compound fractures, that is, where the fracture of the bone is comulicated FRACTURES. 443 with an external ^vonnd, the chances are much more ^^^Xpainto Tnall the comminuted fracture, that is, where the bone is smashed into small no reasonable chance of a cure can be entertained. pieces, ^^J :v/^ The probahihty of reunion of the parts depends upon the depth of the woundrnnected with the fracture-the contusion of the soft parts mthe ^mediate neidibourhood of it-the blood-vessels, arterial or venous that hTe been wounded-the propinquity of some large jomt to which the infl«tion maybe communicated-dislocation of the extremities of the fracW ?oint- injuries of the periosteum - the existence of sinuses, caries or necrosis, ov the fracture being compound, or broken into nume- Tnttte that^SlT of flesh, the cure of fracture is difficult ; likewise in an old or worn-out horse-or when the part is inaccessible to the hand or to instruments-or when separation has taken place between the parts that were ^tinning to unite - or where the surroundmg tissues have btn or are losing their vitality-or when the patient is already afflicted with anv old or permanent disease. ^ r n . It may be useful briefly to review the various seats of fracture^ FRrcTURE OF THE SKULL.-Thc skull of the horso IS so securely defended by the yiekhng resistance of the temporal muscle, that fracture rarely occurs except at the occipital ridge ; and should a depression of bone be Se effected, ^t .vill produce complete coma, and bid defiance to all sur- S skill Fracture of the skull is generally accompanied by stupidity, SnvulSve motions of the head or hmbs, laborious breathing, and a stag- Tenni wir The eyes are almost or quite closed, t^^^ ^^ead is carried low and the lower lip hangs down. Blows on the cranium, which the brutahty of man too often^i^^^ as well as many accidents, are very serious matters, anrequTre considerable attention, for, although it may have been ascer- tated'that the cranium is uninjured, there maybe considerable concussion of the brain. 444 FRACTURES. It having been known that a horse had received a violent blow on tha head, the strictest examination of the part should take place. An artillery horse broke loose from his groom, and, after galloping about, dashed in to his own stall with such force as sadly to cut his face under the forelock. The farrier on duty sewed up the wound, proper dressings were appUed, and in a little more than a fortnight the wound was healed and the horse dismissed, apparently well. Four days afterwards the patient moved stiffly ; the jaws could not be separated more than a couple of inches, and there was evident locked jaw. The horse was cast, and the place where the wound had been was most carefully examined. On cutting to the bottom of it, a fracture was discovered, and a piece of bone three-fourths of an inch long was found on the centre of the parietal suture. This was re- moved — the wound was properly dressed, and a strong aloetic drink waa given with great difficulty. The aloetie drink was repeated — the bowels became loosened — the tetanic symptoms diminished, and in less than three weeks the horse was perfectly cured. This case, related in the seventh volnme of the ' Veterinarian,' is a very interesting one. There was some carelessness in entrusting the treatment of the wound to the farrier ; but the surgeon afterwards repaired the error as well as he could, and no one was better pleased than he was at the result. A violent blow being received on the forehead, the part should always be most carefiilly examined. Hurtrel D'Arboval relates three cases of fracture of the skull. One occurred in a mare that ran violently against a carriage. The skull wag depressed, and a portion of bone was removed, but it was four months era complete reunion of the edges was effected. Another horse received a violent kick on the forehead. The union of the depressed bones waa effected after the external wound was healed, but there was always a depression, an inch in length. An aged mare met with the same kind ol accident. A depression here remained as large as a finger. Fracture of the arch of the orbit of the eye. — Mr. Pritchard, in the second volume of the 'Veterinarian,' relates an interesting case of fracture of the orbit of the eye. A chestnut mare, he says, received a blow which fractured the orbit from the superciliary foramen, in a line through the zygomatic processes of the temporal and malar bones, to the outer angle of the eye. The detached bone, together with the divided integument, hung over the eye so as to intercept vision. On examining the place where the accident occurred, two portions of bone were found belonging to the orbital arch. After carefully inspecting the wound and finding no other detached portions, nor any spiculee which might irritate or wound, the adjacent portions of the skin were carefully drawn together and secured by a silver wire, which closed the wound, and confined the detached portion of bone in its proper place. A mash diet was ordered. On the following day there was considerable inflammation. The eye was bathed with warm water, and a dose of physic administered. On the third day the inflammation and sweUing had still more increased. Blood was abstracted from the vein at the angle of the eye. The swelling and inflammation now speedily abated, and on the fifteenth day the wound had quite healed. If a fracture of this kind is suspected, its exist- ence may be easily determined, by introducing the thumb under, and keeping the fore-finger upon, the edge of the orbit. Fracture of the nasal bones. — This will sometimes occur from falling, or be produced by a kick from another horse, or the brutality of the attendant or the rider. We have seen a passionate man strike a horse about the head with a heavy hunting-whip. The danger of punishment of this kind is obvious ; and so would be the propriety of using the whip FRACTURES. 445 for acotlier purpose. A fracture of this kind is generally accompanied by a laceration of the membrane of the nose, and considerable basmon-liage, which, however, may generally be arrested by the application of cold water. The fractured portion of bone is usually depressed, and, the space for breathing being diminished, difficulty of respii-ation occurs. The author had a case of fracture of both nasal bones. He was enabled to elevate the depressed parts, but the inflammation and swelliug vrere so great, that the animal was threatened with suffocation. The operation of tracheotomy was resorted to, and the animal did well. If there is fracture of the nasal bones mth depression, and only a little way from the central arch and the section between the nostrils, a slightly curved steel rod may be cautiously introduced into the passage, and the depressed portions carefully raised. If this cannot be effected, the trephine must be applied a Httle above or below the fracture, and the elevator or steel rod be introduced through the aperture. If the fractui'e is in any other part of the bone, it will be impossible to reach it with the elevator, for the turbinated bones are in the way. The trephine must then be resorted to in the first instance. The wound, if there is any, must be covered, and a compress kept on it, A writer in a French journal relates a case in which a horse was violently kicked, and there Avas a contused wound with depression of bone. The trephine was applied. Fifteen splinters were extracted, and the case terminated well. It, nevertheless, too often happens that, in these injuries of the nasal membrane, the inflammation will obstinately continue in despite of all that the surgeon can do, and an obstinate and almost incur- able nasal gleet Avill result. If, however, this do not appear, some portion of bone may remain depressed, or the membrane may be thickened by inflammation. The nasal passage wiU then be obstructed, and a difficulty of breathing, re- sembling roaring, "will ensue. The superior maxillary or upper jaw-bone will occasionally be frac- tured. Mr, Cartwright had a case in which it was fractured by a kiok at the situation where it unites with the lachrymal and malar bones. He applied the trephine, and removed many small pieces of bone. The wound was then covered by adhesive plaster, and in a month the parts were healed, Mr, Clayworth speaks of a mare who, being ridden almost at speed, fell and fractui'ed the upper jaw, three inches above the corner incisors. The front teeth and jaw were turned like a hook completely within the lower ones. She was cast, a balling iron put into her mouth, and the surgeon, exerting considerable force, pulled the teeth outward into their former and proper situation. She was then tied up so that she could not rub her muzzle against anything, and was well fed -with bean-meal, and linseed tea. Much inflammation ensued, but it gradually subsided, and, at the expiration of the sixth week, the mouth was quite healed, and scarcely a vestige of the fracture remained. A very extraordinary and almost incredible account of a fracture of the superior maxillary bone is given in the records of the Royal and Central Society of Agriculture in France. A horse was kicked by a companion. There was fracture of the upper part of the superior maxillary and zygomatic bones, and the eye was almost forced out of the socket. Few men would have dared to undertake a fracture like this, but M. Revel shrank not from his duty. He removed several small splinters of bone — replaced the larger bones — returned the eye to its socket — confined the parts by means of sufficient sutures — slung the horse, and rendered 446 FRACTURES. it impossible for tlie animal to rub his head against anything. In sis weeks the cure was complete. The inferior maxillart bone, or lower jaw, is more subject to fracture, and particularly in its branches between the tushes and the lower teeth, and at the symphysis between the two branches of the jaw. Its position, its length, and the small quantity of muscle that covers it, especially anteriorly, render it more liable to fracture, and the same circumstances combine to render a reunion of the divided parts more easy to be accomplished. Mr. Blaine relates that in a fracture of the lower jaw he succeeded by making a strong leather frame that exactly encased the whole jaw. The author of this volume has effected the same object by similar means. M. H. Boulay relates, in the Bee. de Med. Vet. for Nov. 1838, that he attended a horse, fracture of whose lower maxillary had taken place at the neck of that bone, between the tushes and the comer incisor teeth. The whole of the interior part of the maxillary bone in which the incisor teeth weie planted was completely detached from the other portion of the bone, and the parts were merely held together by the membrane of the m.outh. The horse was cast — the comer tooth on the left side extracted — tho wound thoroughly cleansed — the fractured bones brought into contact — some holes were drilled between the tushes and the second incisor teeth, above and below, through which some pieces of brass wire were passed, and thus the jaws were apparently fixed immoveably together. The neck of the maxiUary bone was surrounded by a sufficient compress of tow, and a Ligature tied around it, with its bearing place on the tushes, and all motion thus prevented. The horse was naturally an untractable animal, and in his efforts to open his jaws the wires yielded to his repeated struggles, and were to a certain degree separated. The bandage of tow was, however, tightened, and was sufficient to retain the fractured edges in apposition. The mouth now began to exhale an infectious and gangrenous odour ; the animal v/as dispirited, and would not take any food ; gangrene was evidently approaching, and M. Boulay determined to amputate the inferior portion of the maxillary bone, the union of which seemed to be impossible. The sphacelated portion of the maxillary was entirely re- moved; every fragment of bone that had an obhque direction was sawn away, and the rough and uneven portions which the saw could not reach were rasped off. Before night, the horse had recovered his natural spirits, and was searching for something to eat. On the following day a few oats were given to him, and he ate them with so much appetite and ease, that no one looking at him would think that he had been deprived of his lower incisor teeth. On the following day some hay was given to him, which he ate without difficulty, and in a fortnight was dismissed, the wounds being nearly healed. In the majority of these cases of simple fracture a cure might be effected, or should, at least, be attempted, by means of well adapted bandages around the muzzle, confined by straps. It will always be prudent to call in veterinary aid, and it is absolutely necessary in case of compound fracture of the lower jaw. FRACTURE OF THE SPINE. — This accident, fortunately for the horse, is not of frequent occurrence, but it has been uniformly fatal. It may take place in different parts of the vertebras. In fracture of the cervical verte- bne, especially if it occurs above the fifth or sixth bone, the diaphragm win become palsied and death from suffocation vnll instantly result. This, FRACTURES. 447 what is commonly termed ' broken neck,' is not often met with, and is generally produced by falls or blows. But by far the most frequent seat of fractured vertebris is in the lumbar region. It sometimes happens iu the act of falling, as in leaping a wide ditch ; but it is oftener produced by the violence of some sudden unconscious movement of the animal, such aa dropping the hind legs into some unseen grip or trench when going fast with hounds. It has also occurred during the struggles of the animal when cast and undergoing some painful operation. It is generally sufficiently evident while the horse is on the ground. Either a snap is heard, indicative of the fracture, or the struggles of the hind-limbs suddenly and altogether cease. In a few cases the animal has been able to get up and walk to his stable ; in others, the existence of the fracture has not been apparent for several hours : showing that the verte- brae, although fractured, may remain in their place for a certain period of time. The bone that is broken is usually one of the posterior dorsal or anterior lumbar vertebrae. There is no satisfactory case upon record of reunion of the fractured parts. In the human being, the depressed portion of the spinal arch and of the fractured vertebrae have been removed by a dexterous operation, and sensibility and the power of voluntary motion have, in cases few and far between, been restored ; but in the horse this has rarely or never been effected. We should consider him a bold operator, but we should not very much dislike him, who made one trial, at least, how far surgical skill might be available here. Mr. W. C, Spooner relates an interesting case in the eleventh volume of the ' Veterinarian, ' and many such have probably occurred. A horse had been clipped about three weeks, and "was afterwards galloped sharply on rough ground, and pulled up suddenly and repeatedly, for the purpose of sweating him. After that he did not go so well as before, and would not canter readily, although he had previously been much used to that pace. Two days before he was destroyed, the groom was riding him at a slow pace, when he suddenly gave way behind, and was carried home and could not afterwards stand. He had, doubtless, fractured the spine shghtly when pulled up suddenly, but without displacing the bones. M. Dupuy was consulted respecting a mare apparently palsied. She had an uncertain and staggering walk, accompanied by evident pain. After various means of relief had in vain been tried during five-and- twenty days, she was destroyed. A fracture of the last dorsal vertebrae was discovered. It had never been quite complete, and ossific union was beginning to take place. Fbacture of the ribs. — These fractures are not always easily recog- nised. Those that are covered by the scapula may exist for a long time without being detected, and those that are situated posteriorly are so thickly covered by muscles as to render the detection of the injury almost impossible. In the third volume of the ' Veterinarian ' it is related that a man was trying to catch a mare in a field. She leaped at the gate, but faiHng to clear it, she fell on her back on the opposite side. She lay there a short time, and then got up and trotted to the stable. She was saddled, and her master, a heavy man, cantered her more than three miles. She then became unusually dull and sluggish, and was left on the road. She was bled ; and on the following morning an attempt was made to lead her home. She was not, however, able to travel more than a mile. On the following morning she was evidently in great pain, and a veterinary surgeon, discovering a sHght depression of the spinous processes of the eleventh and twelfth dorsal vertebrae, and detecting a certain crepitus, 448 ■ FRACTURES. ordered lier to be destroyed. On post-mortem examination, the twelftb dorsal vertebra was found fractured, and the eleventh, twelfth, and thirteenth ribs on the near side were all fractured about two inches from their articulation with the vertebrse. Hurtrel D'Arboval says that ' the two ribs behind the elbow are the most subject to fracture, and the false ribs, from the yielding motion which they possess, are least Hable.' The ordinary causes of fracture are kicks and blows, or falls on the chest, and especially in leaping. The fractures are generally about their middle, and, in the tme ribs, commonly oblique. They are occasionally broken into splinters, and il those splinters are directed inward, they may seriously wound the pleura, or lungs. In order most certainly to detect the situation and extent of these fractures, it may be necessary to trace the rib through its whole extent, and, should there be any irregularity, to press firmly upon it above and below in order to ascertain the nature and extent of the injury. If fracture is detected, it is not often that much essential good can be done. K there is httle or no displacement, a broad roller should be tightly drawn round the chest, in order to prevent as much as possible the motion of the ribs in the act of breathing, and to throw the labour on the diaphragm and the abdominal muscles until the fractured parts are united. Lf the fractured parts protrude outwards, a firm compress must be placed upon them. If they are depressed, it will always be advisable to place a firm bandage over the seat of fracture, although, perhaps, there may be scarcely the possibility of elevating them to any considerable degree. Should much irritation be the consequence of the nature or dii-ection of the fracture, proper means must be adopted to allay the constitutional disturbance that may be produced. General or local bleedings will be most sei-viceable. Fractdee of the pelvis. — This is not of frequent occurrence, on account of the thickness of the soft parts which surround the pelvis, and protect it from injury, but it is of a most serious character when it doe3 take place, on account of the violence which must have been necessary to produce it. The usual causes are falls from a considerable height, or beavy blows on the pelvis. The injury may have reference to the internal or external portion of the pelvis. In the first case, the danger may not be discovered until irreparable mischief is produced. When it is chiefly external, the altered appearance of the hip speaks for itself. It is rarely in our power to afi'ord any assistance in cases like this, except when there are fractured portions of the bone that may be partially or entirely removed, or the projecting spine of the iHum is only partially fractured. M. Levrat gives an interesting account of a case of fracture of the right side of the pelvis, near the acetabulum, in leaping a wide ditch when hunting. ' The lameness which it occasioned,' says he, ' was such that the toe of the foot was scarcely permitted to touch the ground while the motion was at all rapid. When the motion was slow the foot was placed flat on the ground, but with great difficulty moved forward. On applying my right hand to the fractured part, which did not exhibit any heat, and seizing with my left hand the point of the thigh, I felt a movement of the ischium, which easily enabled me to judge of the fracture and its seat, and to discover that none of the fractured parts were displaced. I ordered her to be kept quiet for three weeks, and then permitted to wander about the stable. At the end of two months she was mounted and exer- cised at a foot pace, and in another month she was enabled to sustain the longest day's work without lameness. In the following year she was placed in the stud of the Baron de Stael, where she produced some good foals.' FRACTURES. 449 The annals of the school at Alfort contain the case of an old mare with fracture of the pelvis and of the left ischium, and in whom union of the bones was effected so promptly, that on the thirtieth day very little lameness remained, and she shortly returned to her usual work. She soon afterwards died from some other cause, and the state of the osseous parts was thoroughly examined. These cases, however, stand almost alone, and post-mortem examination discovers fractures of the ischium and the pelvis, and each bone divided into many pieces, so that it is impossible for the hind quarters of the animal to be supported — also fractures of the exter- nal angle of the ihum, which rarely is again consoHdated, and roughness of the bony fragments, which produce sad laceration of the soft parts. Fracture of the ischium presents almost insuperable difficulties — that of the ilium is uniformly fatal. The upper and projecting part of the ilium or hip-bone is not unfre- quently fractured, by the animal coming in contact with some hard sub- stance, such as the side of the stable-door, or from getting cast in the stable. It generally causes lameness, but after a time the bone unites, although from the action of the muscles attached to this part, it assumes a different position, producing various degrees of defoiToity, and constitutes what is termed 'hip down' or 'let down on the hip.' Feactctre of the tail. — This accident is not of frequent occurrence, except from accidental entanglement, or the appHcation of brute force. The fracture is easily recognised, frequently by the eye and always by the fingers. If the tail is not amputated, a cord passed over a pulley, and with a small weight attached to it, will bring the separated bones again into apposition, and in about a month the natural condition of the- part will be sufficiently reinstalted. Fractuees of the limbs. — These, fortunately, are of rare occurrence in the horse, for although their divided edges might be easily brought again into apposition, it would be sometimes impossible to retain them in it, for the slightest motion would displace them. A rapid survey of each may not, however, be altogether useless. Fracture of the scapula. — The author is not aware of the successful treatment of this accident by any English veterinary surgeon. Mr. Fuller says, in the eighth volume of the ' Veterinarian,' that he attempted it, but from the difficulty of keeping the divided edges of the bone in apposi- tion with each other, and the natural untractableness of the animal, and symptoms of tetanus beginning to appear, the patient was destroyed. The fracture was a little above the neck of the scapula, and the muscles were dreadfully lacerated. Fracture of the humerus. — It is not at all times easy to discover the existence and precise situation of fracture of the humerus. The lameness is very grea1>-— the animal will not bear at all upon the broken limb — he will drag it along the ground — he will move slowly and vtdth difficulty, and his progression will consist of a succession of short leaps. The lifting of the foot will give very great pain. If he is roughly handled, he will some- times rear or throw himself suddenly down. By careful apphcation of the hand a crepitus will more or less distinctly be heard. The chances are always materially against the union of a fracture of the humerus. The patient must be kept constantly suspended, and bandages carefully appHed. M. Delaguette relates in the Journal Pratique for December 1831, that he attended an entire draught-horse whose humerus had been fractured by the kick of a mare. The fracture extended longitudinally through two- thii>ds of the length of the bone, and the parts were separated from each other. They were brought again into apposition, and kept so by means of pitcli plasters and splints. The horse was put into slings ; the pavement Q 0 460 FRACTURES. of the stable was taken up ; a hollow dug under the fractured limb, and this depression filled with straw, in order to afibrd a soft support for the foot. He was bled, gruel alone given as food, and injections daily ad- ministered. On the 25th day the rollers were removed and replaced. On the -lOth day he began to rest on the fractured limb. On the GOth day the bandages were removed, the fracture had been well consolidated, and the horse rested his weight upon it. It is reluctantly added that he was afterwards destroyed on account of some disease of the loins. Fractuke of the radius. — This accident is not of unfrequent occur- rence. It commonly takes an obHque direction, and is usually first discovered by the displacement of the limb. Mr. Gloag, of the 10th Hussars, in the fourth volume of the ' Veterinarian,' gives an interesting account of a case that occurred in his practice. ' An entire black cart- horse was grazing in a field, into which some mares were accidentally turned. One of them kicked him severely a httle above the knee. He, however, contrived to get home, and, being carefully examined, there was found a simple fracture of the radius, about an inch and a half above the knee. The ends of the fractured bone could be heard distinctly grating against each other, both in advancing the leg and turning it sideway from the body. He was immediately placed in a sling, not completely elevated from the ground, but in which he could occasionally relieve liimself by standing. The leg was well bathed with warm water, and the ends of the Done brought as true to their position as possible. Some thin sHps of green wood were then immersed in boiling water until they would readily bend to the shape of the Hmb, and they were tied round the part, the ends of them being tied with tow. A fortnight afterwards he became very troublesome, knocking his foot on the ground, and when, at the expiration of the sixth week, he was taken from the slings, there was a considerable bony deposit above the knee. This, however, gradually subsided as the horse regained his strength, and, with the exception of turning the leg a little outwards, he is as useful as ever for common purposes. Fracture of the ulna. — This is far more exposed to danger than the last two bones, and is oftener fractured. The fracture is generally an oblique one, and about two-thirds from the summit of the bone. It is immediately detected by the altered action and different appearance of the limb. It is not so difficult of reduction as either the humerus or the scapula, when the fracture is towards the middle of the bone. A great quantity of tow saturated with pitch must be placed around the elbow, and coiifined with firm adhesive plasters, the ground being hollowed away in the front of the injured leg, so that no pressui'e shall be made by that foot. Fracture of the femur. — Considering the masses of muscle that surround this bone, and the immense weight which it supports, it would naturally be deemed impossible to reduce a real fracture of the femur. K the divided bones are ever united, it is a consequence of the simple repose of the parts, and their tendency to unite. Professor Dick, however, relates in the second volume of the 'Veterinarian,' a very singular and interesting account of the cure of fracture of the femur. He was re- quested to attend a bay mare that had met with an accident in leaping a sunken fence. He found a wound in the stifle of the hind leg running transversely across the anterior of the articulation, about an inch and a half in length, and in it was a portion of bone that had been fractured, and that had escaped from its situation towards the inside of the stifle, vrhere it was held by a portion of ligament. The isolated nature of the FRACTURES 451 fractured portion, tlie difficulty, or rather impossibility of replacing it in its situation, and the few vessels which the connecting medium possessed, rendered it impossible that union would be effected ; he therefore deter- mined to remove it. Having enlarged the wound, and divided the portion of capsular liga- ment w'hich retained it in its place, he extracted the bone, and found it to be the upper part of the inner anterior condyle of the femur, measuring three inches in length, one inch and a half in breadth, and about an inch in thickness, and being in shape nearly similar to the longitudinal section of a hen's egg. After the removal of the bone the animal seemed very much relieved ; the Avound was firmly sewed up, adhesive strapping apphed over it, and the part kept wet ■with cold water. Two days afterwards considerable swelling had taken place ; she seemed to sufi'er much, and there was some oozing from the wound. Fomentations were again applied, and she was slung. She now began rapidly to improve, and, although one of the largest articulations in the body had been laid open, and a part of the articular portion of the bone removed, the wound healed so rapidly that in three weeks she walked with little lameness to a loose box. At the expiration of another three weeks, the Professor again Adsited her. On being led out she trotted several times along the stable yard, apparently sound, with the exception of moving the limb in a slight degree wider than usual, and so completely was the part covered that, had it not been for a small scar that remained, a stranger could not have known that such an accident had taken place. Feactdee of the patella. — This does occasionally, though very seldom occur. It is usually the consequence of A-iolent kicks or blows, and if this singular bone is once disunited, no power can bring the divided por- tions of the bone together again. Fracture of the tibu. — This afiection is of more frequent occurrence, and of more serious consequence than we were accustomed to imagine it to be. Mr. Trump, twelve years ago, first called the attention of the pro- fession to some singular circumstances connected with the tibia, in the third volume of the ' Veterinarian.' A large draught-horse belonging to the Dowlais Iron Company at Merthyr Tydvil, came in from his labour very lame in the near hind leg, but with no visible sign of any severe injury being received. The foot was searched, but nothing farther was done. He stood in the stable several days, and then was turned into a field, and was discovered one morning with the limb dependent, and a fracture of the tibia just above the hock. Fourteen or sixteen months after that, another horse came home from a journey of seven miles, lame, with a slight mark on the inside of the thigh — a mere scratch, and very little tumefaction. There was nothing to account for such severe lameness : but a few mornings afterwards, the tibia was seen to be fractured. The front of the bone was sphntered as from a blow. Two months after that, another horse had been observed to be lame seven or eight days. A shght scratch Avas observed on the inside of the thigh, with a httle swelling, and increased heat and tenderness just above the hock. Mr. Trump had examined the foot during the time that the horse stood in the stable, not being satisfied that the apparently slight injury on the thigh could account for the lameness. He was turned to grass, and three days afterwards the tibia was found broken at the part mentioned, and evidently from a blow. Were there not positive proof of 062 452 FlUCTURES. the circumstance, it would have been deemed impossible that a fracture, and of such a bone, could have existed so long without detection, ]VIi'. J. S. Mayer gives an interesting account of the successfal treat- ment of a case of fracture of the tibia, in the Transactions of the Vet. Med. Association, in which some other cases, successfully treated, are nai-rated. The simpHcity of the process will, we trust, encourage many another veterinary surgeon to follow his example. ' A horse received a blow on the tibia of the near leg, but httle notice was taken of it for two or three days. When, however, we were called in to examine him, we found the tibia to be obhquely fractured about mid- way between the hock and the stifle, and a small wound existing on the inside of the leg. It was set in the following manner : — The leg from the stifle down to the hock was well covered with an adhesive compound ; it was then wrapped round with fine tow, upon which another layer of tho same adhesive mixture was laid, the Avhole being well sphntered and bandao-ed up, so as to render what was a slightly compound fracture Vi simple one. The local inflammation and sympathetic fever that super- vened were kept down by antiphlogistic measures. At the end of six weeks the bandages and splints were removed, and readjusted in a similar way as before, and at the termination of three months from the time o) the accident, he was discharged cured, the splints being wholly taken off, and merely an adhesive stay kept on the leg. The horse is now at work raid quite sound, there being merely a httle thickening, where the callus is formed.' Fracture op the bones of the hock. — This is not of frequent occur- rence, but very difficult to treat, from the almost impossibihty of finding means to retain the bone in its sitaation. A case, however, somewhat simple in its nature, occurred in the practice of Mr. Cartwright. A colt, leaping at some rails, got his leg between them, and, unable to extricate himself, hung over on the other side. After being liberated, it appeared on examination that there was a simple horizontal fracture of the whole of the OS calcis about the middle. A splint was contrived so as to reach froni the middle of the tibia to that of the cannon bone, and this was appUed to the front of the leg, keeping the hock from its usual motion, and relaxing the muscles inserted into the os calcis. Underneath this spUnt a charge was applied about the part, in order to form a level surface for the splint to rest upon. The whole was bound together by proper adhesive band- ages, and he was ordered to be kept quiet in the stable, but not to be sluno-. In about two months the hock was fired and became perfectly sound. Fracture of the cannon or shank bone. — This is of more frequent occurrence than that of any other bone, on account of the length of the leg, and the danger to which it is exposed. There is rarely any difficulty in detecting its situation, but there is sometimes a great deal in bringing the divided edges of the bone again into apposition. A kind of windlass, or a power equal to it, is occasionally necessary to produce sufficient ex- tension in order to effect the desired purpose : but the divided edges being brought into apposition are retained there by the force of the muscles above. Splints reaching from the foot to above the knee should then be applied. The horse should be placed in slings, after which, if the case is goino- on well, the animal may often be turned out. In cases of compound fracture the wounds should be carefully attended to : but Mr. Percivall says, in his ' Hippopathology,' that he knows one or two old practitioners, who are in the habit of treating these cases in a very summary and generally successfal manner. They employ such com- mon support, with splints and tow and bandages, as the case seems to FKACTURES. 453 require, and then the animal with his leg boimd up is turned out, if the season permits : otherwise he is placed in a yard or box, where there is not much straw to incommode his movements. The animal will take care not to impose too much weight on his fractured limb ; and, provided the parts are well secui-ed, nature will generally perform the rest. Fkacture of the sesamoid bones. — There are but few instances of this on record. One is related by Mr. Faller, of March, in the third volume of the 'Veterinarian.' He was galloping steadily and not rapidly a horse of his own, when the animal suddenly fell as if he had been shot. He was broken down in both fore legs. The owner very humanely ordered him to be immediately destroyed. Both the perforans and perforatus ten- dons of the near fore leg were completely ruptured, just where they pass over the sesamoid bone, which was fractured in a transvei'se direction. The sesamoid bone of the off leg was fractured in the same dii'ection, but the tendons were entire. Another case is one described by Mr. Harris, of Preston, in the fifth volume of the ' Veterinarian.' A strong coach-like animal was galloped rapidly. He had not gone more than a hundred yards before he suddenly fell, and it was with great difficulty that he could be led home, a distance of about two miles. There was soon considerable swelling in the off fore leg — great pain on the animal's attempting to walk, and his fetlock nearly touched the ground. Some slight crepitus could be detected, but the exact seat of it could not be ascertained. Mr. Harris considered the case as hopeless, but the owner would have some means tried to save the animal. He was accordingly bled and physicked, and cold lotions and bandages were applied to the foot. Two days afterwards some bony spicula? began to protrude through the skin, and, the case being now perfectly hopeless, the animal was destroyed. The inner sesamoid bone was shivered to atoms. Fracture of the upper pastern. — Thick and strong, and moveable as tliis bone seems to be, it is occasionally fractured. This has been the con- sequence of a violent effort by the horse to save himself from falling when he has stumbled, — it has happened when he has been incautiously per- mitted to run down a steep descent — and has occurred when a horse has been travelling on the best road, and at no great pace. The existence of fracture in this bone is, generally speaking, easily detected. The injured foot is as lightly as possible permitted to come in contact with the ground. As httle weight as may be is thixawn on it, or, if the animal is compelled to use it, the fetlock is bent down nearly to the ground, and the toe is turned upward. K the foot is rotated a crepitus is generally heard. This, however, is not always the case. A case is related in the Bee. de Med. Vet, November, 1831, in which M. Levrat was requested to examine a horse that had suddenly become lame. The near hind leg was reti-acted, and the foot was kept from touching the ground. He carefully examined the foot, and discovered that much pain was expressed when the pastern was handled. He suspected fracture of the bone, but he could not detect it. He bled the animal, ordered cooling applications to the part, and gave a dose of physic. Three days afterwards he again saw his patient, and readily detected a fracture, taking a direction obliquely across the pastern. The probabiHty of success in the treatment of this fracture, depends on its being a simple or compound one. If it runs laterally across the bone, it may be readily and successfully treated — if it extends to the joints above and beloAv, it "will probably terminate in anchylosis, and if the bone is sliivered, as it too frequently is, into various parts, there would scarcely seem the possibility of a successful treatment of the case. The instances. *li4 FRACTURES. however, are numeroiis in which the case terminates successfully, Hnrtrel D'Arboval recommends that a bandage steeped in some adhesive matter should be applied from the coronet to the middle of the leg. On this some wet pasteboard is to be moulded, enveloped afterwards in a linen bandage. A small spUnt is now to be applied before and behind and on each side, and the hollow places are filled with tow, in order to give them an equal bear- ing. If this does not appear to be sufficiently secure, other splints, thicker and broader, are placed over those, extending to the knee or the hock. The case related by M. Levrat was treated in this way. It will be com- paratively seldom that it will be necessary to suspend the patient. The animal under the treatment of M. Levrat, kept his foot in the air for nearly three weeks. At the end of that period he now and then tried to rest his toe on the litter. Six weeks after the accident he began to throw some weight on the foot ; and a few days afterwards he was able to go to a pond, about fifty paces from his stable, and where, of his own accord, he took a foot-bath for nearly an hour at a time. At the expiration of another month he was mounted, and went very well at a walking-pace ; he was, however, still lame when he was trotted. Another horse, treated by the same surgeon, was soon able to rest on the bad leg, in order to change his position — he was allowed three weeks after that, and then commenced his former daily work — the drawing of a heavy cart. He limped a little when he was trotted; but did as much slow work as he was ever accustomed to do. Fracture of the lower pastern.— Although this bone is much shorter than the upper pastern, there are several instances of fracture of it. The fractures of this bone are commonly longitudinal, and often present a lesion of continuity extending from the larger pastern to the coffin-bone. It is frequently splintered, the splinters taking this longitudinal direction. Hurtrel D'Arboval relates three cases of this, and in one of them the bone was splintered into four pieces. In several instances, however, this bone has been separated into eight or ten distinct pieces. When the fracture of the bone is neither compound nor complicated, it may be perfectly reduced by proper bandaging, and, in fact, there have been cases, in which union has taken place with slight assistance from art beyond the appHca- tion of a few bandages. M. Gazot relates a very satisfactory termination of fracture of this bone in a carriage-horse in the Becueil de Med. Vet. for 1834. The animal fell, and was totally unable to rise again. He was placed on some hurdles, and drawn home. A veterinary surgeon being consulted, recognised fracture of the lower pastern in both feet, and advised that the animal should be destroyed. It was a favourite horse, between five and six years old, and the owner determined to give it a chance of recovery. M. Gazot was consulted. He plainly recognised a transverse fracture in the lower pastern of the right leg, and a longitudinal one in the left pastern. They were both of them simple fractures. The horse was manageable, and seemed to comprehend the whole afiair. He was a favourite of the groom as well as the master, and it was determined to give him a chance of recover3\ He had plenty of good litter under him, which was changed twice in the day. The first object that was attempted to be accomplished was the healing of the excoriations that had taken place in drawing him home, and abating the inflammation that was appearing about the pasterns. At the termination of the first week all these were healed, the horse fed well, and was perfectly quiet, except that when he was tired of lying on one side he contrived to get on his knees, and then to raise himself on his FRACTURES. 455 haunches, and, having voided liis urine and his dung, he turned himself upon the other side, without the bandages round his pasterns being in the slightest degree interfered with. At the expiration of the second week he seemed to wish to get up. The groom had orders to assist him, and a sling was passed under him. Some oats were placed in the manger, and he seemed to enjoy the change for a little while. Soon afterwards he began to be uneasy, and a copious per- spiration appeared on every part. He was immediately lowered, when, with evident delight, he stretched out his head and his legs, and lay almost without motion during several hours. On the following day he was again placed in the sling, and again lowered as soon as he appeared to be fatigued. At the expiration of a month from the time of the accident he could get up without assistance, and would continue standing two or three hours, when he lay down again, but with a degree of precaution that was truly admirable. The bandages around the pasterns had been continued until this period, and had been kept wet with a spii'ituous embrocation. The horse was encouraged to walk a Httle, some corn being offered to him in a sieve. He was sadly lame, and the lameness was considerably greater in the left than in the right foot. A calculous enlargement could also be felt in the direction of the fracture on each pastern ; but it was greatest in the left fetlock, and there was reason to fear the existence of anchylosis between the pastern bones of the left leg. That foot was surrounded with emolhent cataplasms, and, two days afterwards, was pared out, and the cautery applied over both pasterns, the spirituous embrocation being continued. A fortnight afterwards the effect of the cautery was very satisfactory. The action of the part was more free, and there was no longer any fear of anchylosis. It was, however, deemed prudent to apply the cautery over the right pastern. Walking exercise was now recommended, and in the course of another month the lameness was much diminished. It was most on the left side, which, however, had resumed its former degree of inclination. At the expiration of four months the horse was sent to work. His master, however, doubting the stability of the cure, sold him, for which he ought to have had his own legs broken, and he fell into bad hands. He was worked hardly and half- starved ; nevertheless, the calculus continued to diminish, and the lameness altogether disappeared. He soon, however, passed into better hands. He was bought by a farmer at Chalons, in whose service he long remained, in good condition, and totally free from lameness, His last owner gave him the name of Old Broken Leg. Fracture of the corrrN-BONE. — This is an accident of very rare occurrence, and difficult to distinguish from other causes of lameness. The animal halts very considerably — the foot is hot and tender — the pain seems to be exceedingly great, and none of the ordinary causes of lameness are perceived. According to Hurtrel D'Arboval, it is not so serious an acci- dent as has been represented. The fractured portions cannot be displaced, and in a vascular bone like this, the union of the divided parts will be readily effected. Mr. Percivall very properly remarks, that, 'buried as the coffin and navicular bones are within the hoof, and out of the way of all external injury, as well as of muscular force, fracture of them cannot proceed from ordinary causes. It is, perhaps, thus produced: — in the healthy foot, in consequence of the elasticity of their connections, these bones yield or spring under the impression they receive from the bones above, and thus are enabled to bear great weights, and sustain violent shocks without in- jury ; but, disease in the foot is often found to destroy this elasticity, by changing the cartilage into bone, which cannot receive the same weight 456 OPERATIONS. and concussion witliout risk of fracture. Horses that have undergone the operation of neurotomy raore frequently meet witli tliis accident tlian others, because they batter their senseless feet with a force which, under similar circumstances, pain would forbid the others from doing. Fracture of the navicular bone has been sufficiently considered under the article ' Navicular Joint Disease,' p. 413. ]\Ir. Mayer sums up his account of the treatment of fractures in a way that reflects much credit on him and the profession of which he is a mem- ber, 'Let your remedies,' says he, 'be governed by those principles of science, those dictates of humanity, and that sound discretion, which, while they raise the moral and intellectual superiority of man, distinguish the master of his profession from the bungling empiric' CHAPTER XXII. OPERATIONS. These belong more to the veterinary surgeon than to the proprietor of tho horse, but a short account of the manner of conducting the principal ones should not be omitted. It is frequently necessary to bind the human patient, and in no painful or dangerous operation should this be omitted. It is more necessary to bind the horse, who is not under the control of reason, and whose struggles may not only be injurious to himself but dangerous to the operator. The trevis is a machine indispensable in every continental forge ; even the quietest horses are there put into it to be shod. The side-line is a very simple and useful method of confining the horse, and placing him in sufficient subjection for the operation of docking, nick- ing, and sHght firing. The long line of the hobbles, or a common cart-rope with a noose at the end, is fastened on the pastern of the hind-leg that is not to be operated on. The rope attached to it is then brought over the neck and round the withers, and there tied to the portion that comes from the leg. The leg may thus be dra^Ti so far forward that, while the horse evidently cannot kick with that leg, he is disarmed of the other ; for he would not have sufficient support under him if he attempted to raise it : neither can he easily use his fore-legs, or, if he attempts it, one of them may be lifted up, and then he becomes nearly powerless. K necessary, the aid of the twitch or the barnacles may be resorted to. For every minor operation, and even for many that are of more im- portance, this mode of restraint is sufficient, especially if the operator has active and determined assistants ; and we confess that we are no friends to the casting of horses, if it can possibly be prevented. When both legs are included in the hobble or rope — as in another way of using the side-line — the horse may appear to be more secure ; but there is greater danger of his falHng in his violent struggles during the operation. For castrating and severe firing, the animal must be thrown. The safety of the horse and of the operator will require the use of the improved hobbles, by which any leg may be released from confinement, and returned to it at pleasure ; and, when the operation is ended, the whole of the legs may be set at liberty at once without danger. The method of putting the legs as closely together as possible before the pull — the necessity of the assistants all pulling together — and the power which one man standing at CASTRATION. 457 the head and firmly holding the snaffle-bridle, and another at the haunch pushing the horse when he is beginning to fall, have in bringing him on the proper side, and on the very spot on which he is intended to he, need not to be described ; but a ttiuch preferable plan to ha"\dng a man at the haunch is to have a roller round the body, with a rope attached to a ring on the top of it, by pulling this rope in the opposite direction at the same moment as the hobbles are tightened, the side on which he falls is a mat- ter of certainty. This, however, is a method of securing the horse to which we repeat that we are not partial, and to which we should not resort except necessity compelled ; for in the act of falling, and in the struggles aftc* falling, many accidents have occurred both to the horse and the surgeon. Among the minor methods of restraint, but sufficient for many purposes, are the tivitcli and the barnacles. The former consists of a noose passed through a hole at the end of a strong stick, and in which the muzzle is enclosed. The stick being turned round, the muzzle is securely retained, while the horse suffers considerable pain from the pressure — sufficiently great, indeed, to render him comparatively inattentive to that which is produced by the operation ; at the same time he is afraid to struggle, for every motion increases the agony caused by the twitch, or the assistant has power to increase it by giving an additional turn to the stick. The degree of pain produced by the apjDlication of the twitch should never be forgotten or unnecessarily increased. In no case should it be resorted to when milder measures would have the desired effect. Grooms and horsekeepers are too much in the habit of having recourse to it when they have a somewhat troublesome horse to manage. The degree of useless torture which is thus inflicted in large establishments is dreadful ; and the temper of many a horse is too frequently completely spoiled. The barnacles are the handles of the pincers placed over and enclosing the muzzle, and which, being compressed by the assistant, give pain almost equal to that of the twitch. These may appear to be barbarous modes of enforcing submission, but they are absolutely indispensable. In a few instances the blindfolding of the horse terrifies him into submission ; but this is not to be depended upon. The tmtch shoidd be resorted to when the least resistance is offered ; and when that, as it occasionally does, renders the horse more \'iolent recourse must be had to the side-line or the hobbles. In the painful examination of the fore-leg or foot while on the ground, the other foot should be held up by an assistant ; or, if his aid is required in an operation, the knee may be fully bent, and the pastern tied up to the arm. When the hind-leg is to be examined in the same way, the fore-lep' on that side should be held or fastened up, CASTRATION. The period at which this operation may be best performed depends much on the breed and form of the colt, and the purpose for which he is destined. If the horse is designed either for the carriage or for heavy draught, the farmer should not think of castrating him until he is at least a twelve- month old ; and, even then, the colt should be carefully examined. If he is thin and spare about the neck and shoulders, and low in the withers, he will materially improve by remaining uncut another six months ; but if his fore-quarters are fairly developed at the age of a twelve-month, the operation should not be delayed, lest he become heavy and gross before, and perhaps has begun too decidedly to have a will of his own. No specific age, then, can be fixed ; but the castration should be performed 4o8 BLEEDING. rather late in the spring or early in the autumn, when the air is temperat* and particularly when the weather is dry. The only preparation necessary for the colt is keeping him without food for twelve hours before performing the operation. In the majority of cases, no after-treatment will be necessary, except that the animal should be sheltered from intense heat, and more particularly from wet. In temperate weather he will do much better running in the field than nursed in a close and hot stable. The moderate exercise that he will take in grazing will be preferable to perfect inaction. A large and well ventilated box, however, may be permitted. The manner in which the operation is performed will be properly left to the veterinary surgeon ; although we must confess we are disposed to adhere to the old way of opening the scrotum with the hot iron and sear- ing off the testicle with it. The writer has operated on some hundreds of colts in this manner, and, however fearful the operation may appear, experience proves that it is attended with the most successful results. It possesses the advantage of great simplicity in performing the operation, and also from the wound made through the scrotum by the hot iron, taking a considerably longer period to heal than an ordinary incised one, more time is allowed for the slough from the cord to pass through the opening, and thus prevent that swelling and inflammation which so fre- quently follow, when the opening in the scrotum has closed before the slough has separated from the end of the cord. There are several other modes adopted by practitioners in performing this operation. Amongst some, what is called the caustic clam is the favourite method. This consists in opening the scrotum and compressing the cord between two pieces of wood on which some caustic preparation has been placed, and by this means arresting heemorrhage. There is at least an appearance of brutality in this, and we beheve much unnecessary- pain inflicted when the spermatic cord (the vessels and the nerve) is tightly compressed between two pieces of wood, as in a powerfi^l vice, and left there either until the testicle drops off or is removed on the following day by the operator. By others, the scrotum is opened and the testicle removed with a scalpel, hEemorrhage being prevented by a ligature placed round the cord. Another mode of castration has been lately in- troduced : it is called the operation by Torsion. An incision is made into the scrotum as in the latter mode of operation, and the vas deferens is ex- posed and divided. The artery is then seized by a pair of forceps con- trived for the purpose, and twisted six or seven times round. It retracts as soon as the hold on it is quitted, the coils are not untwisted and all bleeding has ceased. The testicle is removed, and there is no sloughing or danger. The most painful part of the operation — the application of the firing-iron or the clams — is avoided, and the wound readily heals. To the practice of some farmers of hoitcliing their colts at an early period, sometimes so early as a month, there is strong objection. When the operation of twitching is performed, a small cord is drawn as tightly as possible round the scrotum between the testicle and the belly. The cir- culation is thus stopped, and, in a few days, the testicles and the scrotum drop off ; but not until the animal has sadly suffered, and inflammation and death frequently ensue. BLEEDING. This operation is performed with a fleam or a lancet. The first is the common instrument, and the safest, except in skilfal hands. The lancet, however, has a more surgical appearance, and will be adopted by the veterinary practitioner. A blood-stick — a piece of hard wood loaded at BLEEDING. 459 one end with lead — is used to strike the fleam into the vein. This is sometimes done with too great violence, and the opposite side of the coat of the vein is wounded. Bad cases of inflammation have resulted from this. If the fist is doubled, and the fleam is sharp and is struck with sufiicient force with the lower part of the hand, the blood-stick may bo dispensed with. For general bleeding the jugular vein is selected. The horse is blind- folded on the side on which he is to be bled, or his head turned well away. The hair is smoothed along the course of the vein with the moistened finger ; then, with the third and little fingers of the left hand, which holds the fleam, pressure is made on the vein sufficient to bring it fairly into view, but not to swell it too much, for then, presenting a rounded surface, it would be apt to roll or slip under the blow. The point to be selected is about two inches below the union of the two portions of the jugular at the angle of the jaw (see cut, p. 199). The fleam is to be placed in a direct line with the course of the vein, and over the precise centre of the vein, as close to it as possible, but its point not absolutely touching the vein. A sharp rap with the blood-stick or the hand on that part of the back of the fleam immediately over the blade, will cut through the vein, and the blood will flow. A fleam with a large blade should always be preferred, for the operation will be materially shortened, and this will be a matter of some consequence with a fidgety or restive horse. A quantity of blood drawn speedily Avill also have far more eSect on the system than double the weight slowly taken, while the wound will heal just as readily as if made by a smaller instrument. There is no occasion to press so hard against the neck with the pail, or can, as some do ; a slight pressure, if the incision has been large enough and straight, and in the middle of the vein, will cause the blood to flow sufiiciently fast ; or, the finger being introduced into the mouth between the tushes and the grinders, and gently moved about, -will keep the mouth in motion, and hasten the rapidity of the stream by the action and pressure of the neighbouring muscles. When sufiicient blood has been taken, the edges of the wound should be brought closely and exactly together, and kept together by a small sharp pin being passed through them. Round this a httle tow, or a few hairs from the mane of the horse, should be wrapped, so as to cover the whole of the incision ; and the head of the horse should be tied up for several hours to prevent his rubbing the part against the manger. In bringing the edges of the wound together, and introducing the pin, care should bo taken not to draw the skin too much from the neck, otherwise blood will insinuate itself between it and the muscles beneath, and cause an unsightly and sometimes troublesome swelhng. The blood should be received into a vessel the dimensions of which are exactly known, so that the operator may be able to calculate at every period of the bleeding the quantity that is subtracted. Care hkewise should be taken that the blood floAvs in a regular stream into the centre of the vessel,, for if it is suffered to trickle down the sides, it will not afterwards undergo those changes by which we partially judge of the extent of inflammation. The pulse, however, and the symptoms of the case collectively, will form a better criterion than any change in the blood. Twenty-four hours after the operation, the edges of the wound will have united, and the pin should be withdrawn. When the bleeding is to be repeated, if more than three or four hours have elapsed, it will be better to make a fresh incision rather than to open the old wound. Few directions are necessary for the use of the lancet. They who are competent to operate with it, will scarcely require any. If the point ia- sufficiently sharp the lancet can scarcely be too broad-shouldered ; and an 460 BLEEDING. abscess lancet will generally make a freer incision than that in common uso. Whatever instrument is adopted, too much care cannot be taken to have it perfectly clean and very sharp. It should be carefully wiped and dried immediately after the operation, otherwise, in a very short time, the edges will begin to be corroded. For general bleeding the jugular vein is selected at the largest superficial i/iie, and most easily got at. In every affection of the head, and in cases of extended inflammatory action, it is decidedly the best place for bleeding. In local inflammation, blood may be taken from any of the superficial veins. In supposed aflTections of the" shoulder, or of the fore-leg or foot, the radial vein, which comes from the inside of the arm, and runs up- wards directly in front of it towards the jugular, may be opened. In affections of the hind extremity, blood is sometimes extracted from the saphcena, or thigh- vein, which runs across the inside of the thigh. In foot cases it may be taken from the coronet, or, much more safely, from the toe ; not by cutting out, as the farrier does, a piece of the sole at the toe of the frog, which sometimes causes a Mound difiicult to heal, and some- times followed by festering ; but cutting down \vith a fine drawing-knife, called a searcher, at the union between the crust and the sole at the very toe until the blood flows, and if necessary, encouraging its discharge by dipping the foot in warm water. The mesh- work of both arteries and veins will be here divided, and blood is generally obtained in any quantity that may be needed. The bleeding may be stopped with the greatest ease, by placing a bit of tow in the little groove that has been cut, and tacking the shoe over it. The operation of bleeding having been described, we would remind our readers of the necessity in every case, in which it is required, of making a large orifice, and abstracting the blood as rapidly as possible, for the constitution will thus be the more speedily and beneficially affected ; and also of the propriety of never determining to take a precise quantity of blood, but of keeping the finger on the artery until the pulse begins to falter — until the strong pulse, becomes softer or the animal is faint, or the oppressed pulse is rounder and fuller. The change which takes place in the blood after it is drawn from the vein, is very diligently noticed by many practitioners, and is certainly de- serving of some attention. The blood coagulates soon after it is taken from the vein. The coagulable part is composed of two substances ; these, by degrees, separate from each other, and the red particles sink to the bottom. If the coagulation takes place slowly, the red particles have more time to sink through the fluid, and there appears on the top a thick, yellowish, adhesive coat, called the buffy coat. It is supposed that the slowness of coagulation, and the thickness of buflfy coat, are indicative of the degree of inflammation. In a healthy state of the system, the coagulation is more rapid, the red particles have not time to fall through, and the buffy coat is thin. These appearances are worth observing ; but much more dependence is to be placed on the character and change of the pulse, and the sjonptoms gene- rally. When the horse is exhausted and the system nearly broken up, the blood will sometimes not coagulate, but be of one uniform black colour and loose texture. When the blood runs down the side of the vessel in which it is received, the coagulation will be very imperfect. When it is drawn in a full stream, it coagulates slowly, and when procured from a smaller orifice, the coagulation is more rapid. Every circumstance affecting the coagulation and appearance of the blood, the pulse, and the general B^Tnptoms, should be most attentively regarded. BLISTERING. 46J BLISTEEIITG. We have spoken of the effect of blisters, when treating of the vai'ioua diseases to which they are apphcable. The principle on which they act is, that no two intense inflammations can exist in neighbouring parts, or perhaps in the system, at the same time. Hence we apply some irritating substance to the skin, in order to excite external inflammation, and thus lessen or remove that which exists in some deeper-seated and, generally, not far distant part. Hence, also, we blister the sides in inflammation of the lungs — the abdomen in that of the bowels — the legs in that of the cellular substance surrounding the sheaths of the tendons, or the sheaths themselves, and the coronet in inflammation of the navicular joints. Blisters have likewise the property of increasing the activity of the neighbouring vessels : thus we blister to bring the tumour of strangles more speedily to a head — to rouse the absorbents generally to more energetic action, and cause the disappearance of tumours, and even callous and bony substances. The judgment of the practitioner will decide whether the desired effect will be best produced by a sudden and violent action, or by the con- tinuance of one of a milder character. Inflammation should be met by active bhsters ; old enlargements and swellings will be most certainly removed by milder stimulants — by the process which farriers call sweating down. There are few more active or effectual blisters than the cantharides or Spanish fly, mixed with the proportions of lard and resin that will be hereafter stated. The best liquid or sweating blister is an infusion of the fly in vinegar, olive oil, or spirit of turpentine, according to the degree of activity required. In preparing the horse for blistering, the hair should be clipped or shaved as closely as possible, and the ointment thoroughly rubbed in. Much fault is often found with the ointment if the blister does not rise, but the failui-e is generally to be attributed to the idleness of the operator. The head of the horse should be tied up during the first two days ; except that, when the sides are blistered, the body-clothes may be so contrived as to prevent the animal from nibbHng and blemishing the part, or bHstering his muzzle. At the expiration of twenty-four hours, a httl© olive oil should be appHed over the blister, which will considerably lessen the pain and supple the part, and prevent cracks in the skin that may be difficult to heal. The oil should be applied morning and night, until the scabs peel off. Every particle of Htter should be carefully removed from the stall, for the sharp ends of the straw coming in contact with a part rendered so tender and irritable by the bhster, will caiise a very great annoyance to the animal. After the second day the horse may be suffered to lie down ; but the possibility of blemishing himself should be prevented by a cradle or wooden necklace, consisting of round strips of wood, strung together, reaching from the lower jaw to the chest, and preventing him from sufficiently turning or bending his head, to get at the blistered part. A blister thus treated will rarely produce the slightest blemish. When the scabs are all removed, the bhster may be repeated, if the case ohould appear to require it, or the horse may be turned out. In inflammations which threaten life, a bhster can scarcely be too activo or extensive. In inflammation of the lungs it should reach over the whole of the sides, and the greater part of the brisket, for, should a portion of the fly be absorbed, and produce strangury (inflammation, or spasmodic affection of the neck of the bladder,) even this new irritation 4