Bull, or Bos Taurus, in zoology, is naturally a fierce and terrible animal, having cylindrical horns, bent outwards, and loose dewlaps. When chased, he has a majestic and sullen air, often tearing up the ground with his feet and horns. A bull, like a stallion, ought to be the most handsome of his species. He should be tall and well made; his eyes large aud protuberant, black and rolling; his forehead broad, and close set, with short curled hair; his ears long, hairy within and without; his horns longish, clean, and bright.— And as Nature has designed the head as his principal instrument, both of offence and defence, it ought to have every mark of strength, and also to be propor-tionably aided by the neck. The large muscular neck, provided it be well proportioned in its parts, and the head finely connected therewith, of all others deserves the preference. — It ought not, however, to be incumbered with a coarse wreathy skin and dewlap; the latter, on the contrary, ought to be thin and supple ; and the former tight and smooth. The breast should be large, and the shoulders deep, thick, broad, and high; the back straight and broad; the ribs broad and circular; the belly deep, straight, and tapering a little to the hind thighs, which should be large and square. The roof ought to be wide, particularly over the chine and hooks; and the tail (if the bull is of the true English breed) should not extend far up the roof; and be strong and deep, with much lank hair upon the under part of it; and the hind part of the buttock rather square than exuberant; from which mark, there is an absolute, certainty he does not partake of the ' buffalo, or muscular thighed breed, which are the worst feeders. The joints and legs should be short and strong; and the body long, deep, and round, filling well up to the shoulder, and into the groin.

The finest breed of bulls, and other cattle, ever reared in this country, was that of the late Mr. Fowler, of Rollright, Oxfordshire ; whose stock was sold by auction, in March, 1791. The editor of this work was among those who witnessed this enchanting exhibition of animals, and admired their incomparable size, form, vivacity, in short, the most picturesque view, both as to objects and scenery. Here the most respectable farmers of the first agricultural country in Europe had assembled; some of whom had travelled several hundred miles, from almost every corner of the island. Fifteen prime heads of cattle, namely, five bulls, and ten cows, were separately sold for the enormous sum of 24041. or, on an average, 1641. each: the finest bull, named Sultan, only two years old, was purchased by Mess. Freeman and Eden, of Gloucestershire, at the price of 2201. 10s. - Such was the reputation of that celebrated breeder, Mr. Fowler, that Frederick the Great, of Prussia, honoured him with his correspondence, and rewarded him with a gold medal.

By well known artificial means, the nature of this animal is remarkably softened, and all his impetuosity destroyed, without diminishing his strength: on the contrary, after this operation, which is usually performed before he is two years old, his weight is increased, and he becomes more fit for agricultural purposes.

The age of these animals may be distinguished by the teeth and horns; the first four teeth drop out at the age of six months, and - are succeeded by others of. a darker colour, which are broader than the former. When they are sixteen months old, the next milk-teeth likewise fall out, and at the commencement of the fourth year, all the fore-teeth are renewed. The bull, cow, and ox, naturally live from fifteen to twenty years; but are generally killed at an earlier age. - See also Cow, and Ox.

These animals are extremely fond of licking themselves, especially when lying at rest; but this practice should, as much as possible, be prevented, for the hair being an indigestible substance, remains in the stomach, where it becomes coated with glutinous matter, which in time forms hard balls, and not unfrequently proves destructive. We conceive that small quantities of common salt, or preferably, rock-salt, occasionally exposed to cattle for licking it, would not only preserve their health, in general, but also tend to obviate the effects of the unwholesome practice before alluded to.

Dr. Lysons, of Bath, informs us, in his "Practical Essays" 1772, that the epilepsy in bulls, is sometimes occasioned by hydatids (little transparent bladders filled with water), or other matters immediately acting upon the brain ; and he relates an instance where this formidable disease was cured by the operation of trepanning, performed by Mr. Cheston, a very ingenious surgeon, at Gloucester.