Again: the hog has been termed "insensible," destitute of all those finer feelings that characterize brutes of a higher order. Yet we have "learned pigs," &c.--a proof that they can be taught something. A celebrated writer tells us that no animal has a greater sympathy for those of his own kind than the hog. The moment one of them gives a signal, all within hearing rush to his assistance. They have been known to gather round a dog that teased them and kill him on the spot; and if a male and female be enclosed in a sty when young, and be afterwards separated, the female will decline from the instant her companion is removed, and will probably die--perhaps of what would be termed, in the human family, a broken heart! In the Island of Minorca, hogs are converted into beasts of draught; a cow, a sow, and two young horses, have been seen yoked together, and of the four the sow drew the best. A gamekeeper of Sir H. Mildmay actually broke a sow to find game, and to back and stand. Swine are frequently troubled with cutaneous diseases, which produce an itching sensation; hence their desire to wallow and roll in the mire and dirt. The lying down in wet, damp places relieves the irritation of the external surface, and cools their bodies. This mud and filth, however, in which they are often compelled to wallow, is by no means good or wholesome for them. NATURAL HISTORY OF THE HOG. "The hog," says Professor Low, "is subject to remarkable changes of form and characters, according to the situations in which he is placed. When these characters assume a certain degree of permanence, a breed or variety is formed; and there is none of the domestic animals which more easily receives the characters we desire to impress upon it. This arises from its rapid powers of increase, and the constancy with which the characters of the parents are reproduced in the progeny. _There is no kind of live stock that can be so easily improved by the breeder, and so quickly rendered suitable for the purposes required._ "The body is large in proportion to the limbs, or, in other words, the limbs are short in proportion to the body; the extremities are free from coarseness; the chest is broad, and the trunk round. Possessing these characters, the hog never fails to arrive at early maturity, and with a smaller consumption of food than when he possesses a different conformation. "The wild boar, which was undoubtedly the progenitor of all the European varieties, and of the Chinese breed, was formerly a native of the British Islands, and very common in the forests until the time of the civil wars in that country."