If not one of the most agreeable, the Hog--or Pig, as it is oftener called--is one of the most useful of the domesticated animals. Indeed, it would be difficult to say how culinary operations could be carried on without the valuable fat which this creature produces in such plenty, and to which both cooks and confectioners are so largely indebted. Besides, there are whole nations who feed almost entirely upon its flesh; and even its skin and bristles constitute an important item of manufacturing industry. The facility with which the flesh can be preserved under the name of bacon, the length of time it may be kept without the danger of spoiling, combined with the undoubted wholesomeness of such an article of diet, render it one of the most convenient articles of provision; and hence in agricultural districts, and other places far remote from towns, it is an almost universal article of food. The number of species that form the group of hogs or swine is very limited indeed; in all not exceeding half a score. These, however, are found in endless varieties, and distributed over all the globe, since in each of the five great divisions one or more indigenous kind of hog has been found. That which forms the type on which the swine family is founded, is, of course, the _Common Pig_; and this is supposed to be descended from the wild boar, so well-known in connection with the chase during medieval times. It is superfluous to say that the common hog of our farmyards has been propagated until an almost countless variety of breeds have been produced--not only every country, but even single counties or provinces having a breed of its own. All, however, are so much alike in habits and general appearance, and their characteristics so well-known, that it would be idle to give any description of them here. We shall only remark that the pig, if fairly treated, is by no means an animal of filthy or dirty habits, as is generally supposed. On the contrary, it is cleanly in its nature; and its slovenliness is brought upon it by the manner in which it is styed up, in its own filth. Neither is it a stupid creature, but possesses considerable intelligence; as is proved by the tricks which it has been taught to perform under the name of the "learned pig;" while several individuals have been trained to follow the gun, and stand to game as stanch as the best pointers. In France it is not uncommon for the truffle-hunters to use pigs in search of this favourite esculent--the keenness of scent which the animal possesses enabling it to find this hidden treasure, just as it does potatoes or other roots, far under the surface of the ground.