قراءة كتاب A Treatise on Sheep: The Best Means for their Improvement, General Management, and the Treatment of their Diseases.
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A Treatise on Sheep: The Best Means for their Improvement, General Management, and the Treatment of their Diseases.
and diffused throughout the kingdom. They have received the name of Merino from a peculiar buff or reddish hue of the countenance, and are supposed to have come originally from Africa; at least Marcus Columella, having seen a strange variety from that country exhibited at Rome, during some public games or shows, took them to his farm, and, having crossed them with the breeds of Tarentum, sent the offspring to Spain. There they throve remarkably, attracting the attention of other nations, to whom they were from time to time exported, and at present may be found in almost every part of the world.
Merinos were brought to England for the first time in 1788, but attracted little attention, owing to the want of rams. Lord Somerville went to Portugal in 1801, for the purpose of selecting such animals as appeared valuable, from uniting a good carcass with a superior fleece, and he succeeded, notwithstanding the disturbed state of the country, in obtaining specimens, which called forth the praises of the shepherds, through whose travelling flocks they passed. Public attention was attracted to them on the commencement of his Majesty's sales in 1804; and their distribution over the country was accomplished in 1811, by the formation of the principal landed proprietors and eminent breeders into a Merino Society.
The Merinos had much prejudice to encounter on being first brought before the public in 1804; but they soon rose in favour and value, and steadily progressed till the Merino Society was established, when, strange though it may appear, all these advantages were at once destroyed. This paradox may, perhaps, be explained, by supposing that the institution of local committees, which immediately followed, allowed the enemies of the change, in distant parts of the kingdom, ample opportunity of striking at the scheme, now that it was entrusted, in many instances, to persons ill qualified for the task either of making converts, or retaining the advantages already gained.
The horns of the Merino are of large size, twisted spirally and extended laterally, approaching closely in these characters to the sheep of Mount Parnassus, a specimen of which is delineated in the work by E. T. Bennett, on the Gardens and Menagerie of the Zoological Society. The face has a characteristic velvety appearance, but the cheeks and forehead are disfigured by coarse hair. The legs are long and small in the bone; the breast and back are narrow, the sides flat, and too much of the weight is expended on the coarser parts. There is a peculiar looseness of skin beneath the throat, which is admired in Spain as denoting a tendency to weight and fineness of wool, though regarded in this country as a sign of a bad skin and want of aptitude to fatten. The average weight of the fleece in Spain is, 8 lbs. from the ram, and 5 lbs. from the ewe. The abundance of the yolk enables the wool to detain all the filth which comes in contact with it, so much so, that by washing the weight is diminished about three-fifths. The fibre of the wool is finer than that of any other sheep, and the carcass, when fat, averages from 12 lbs. to 16 lbs. a-quarter. They are quiet and tractable, and possessed of many good qualities, but they are liable to abortion, are bad nurses, and require a large supply of food, for which, owing to an unprofitable form, they yield no return. Fig. 2. Pl. IV.
The Merinos were at one time in great request in various countries, from a supposition that they would speedily supplant other breeds; but this has never been the case, as the animal soon degenerates when out of Spain, and is only valuable so far as giving rise to varieties, which are equal, if not superior to itself. Large profits were at first expected from their wool, but these were reduced to a trifle when the loss of weight, and fineness in the carcass were taken into account. Mr Hose of Melton Mowbray, put a certain number of Leicester ewes to a ram of the same breed, and an equal number to a merino ram. The result was, that the Leicester fleece weighed 7 lbs., and the one from the cross with the merino, 8 lbs.; and that the former brought in the market 1s. per lb., and the latter 1s. 6d., being a gain of 5s. on the fleece. The carcass of the former, however, weighed 27 lbs. per quarter, and the latter only 25 lbs., being a loss of 5 lbs. on mutton. Much advantage may, however, be expected from our crosses with the Saxon merino, which is in every respect well suited to our notions of a fine animal, as it yields a good wool, and is little inferior in carcass to some of our best breeds.
(17.) Teeth of Sheep.—In common with the rest of the ruminating animals, sheep have eight incisors in the lower jaw, unopposed by any in the upper, a callous pad, which is substituted, being attached to the distal end of the intermaxillarv bones. Between the incisors and molars, or grinding teeth, there is a vacant space of about an inch and a half. There are twenty-four molars, six on each side of each jaw; their crowns are marked with two double crescents, the convexity of which is turned inwards in the upper, and outwards in the lower jaw. The lamb, when newly dropped, is devoid of incisor teeth, though the two central ones are occasionally above the gum even at this early period. When one month old, the first set of incisive teeth are complete. The two fore-teeth of the under jaw drop out at the end of the first year; six months after the two next to these are lost; and at the end of five years the teeth are all renewed. When the permanent teeth are fully grown, it is almost impossible to ascertain the age of the animal, as the soil, the texture of the provender, and the original form of the teeth, have all a greater or less influence over their durability.
(18.) Distinctions between the Sheep and Goat.—Though a comparison of the most common domesticated breeds of sheep and goats, tends to confirm the broad distinctions drawn between them, yet these differences almost entirely disappear, when we attempt to define the characteristics of those races, which still exist in a wild state in various parts of both Continents, where it is so far impossible to determine the precise division to which they belong, that Cuvier holds them unworthy of a generic separation. Sheep and goats, in fact, agree in so many points as regards structure, form, stature, and habit, that were it not that sheep, according to that naturalist, have "their horns directed backwards, returning more or less forwards in a spiral manner, with a generally convex line of profile, and no beard," while the goats have "their horns directed upwards and backwards, their chins generally decorated with a long beard, and their line of profile almost always concave," there would hardly exist a difference worth the noting. Some writers place great reliance on the differences indicated by the different coverings of the animals, ascribing wool to the sheep, and hair to the goat, forgetting that most of the wild sheep, and some of the domesticated races, are covered with hair, while some goats, as those of Thibet and Angora, are remarkable for the fineness of their wool. Even supposing these distinctions to hold good, we have still to combat the fact, that sheep and goats produce mongrels capable of reproduction, a consideration sufficient of itself to prove, that the sheep and goat can never be made to form the types of separate genera.[2]
(19.) Horns of Sheep.—As the Chevrotains or Musks are distinguished, with the Camels, from other animals of this order by the absence of horns, so are sheep, oxen, goats, and antelopes, distinguished from the rest of the horned genera of the order, by the persistence of their frontal prolongations. The horn is an elastic sheath of agglutinated hairs, which appears within the first twelve months, though sometimes present at birth, and increases by layers, one being added every