In the treatment of diseased swine, the "issues," as they are called, ought to be examined, and be kept free. They may be found on the inside of the legs, just above the pastern joint. They seem to serve as a drain or outlet for the morbid fluids of the body, and whenever they are obstructed, local or general disturbance is sure to supervene. SPAYING. This is the operation of removing the ovaries of sows, in order to prevent any future conception, and promote their fattening. (See article _Spaying Cows_, p. 201.) It is usually performed by making incision in the middle of the flank, on the left side, in order to extirpate or cut off the ovaries, (female _testes_,) and then stitching up the wound, and wetting the part with Turlington's balsam. An able writer on this subject says, "The chief reason why a practice, which is beneficial in so many points of view to the interests and advantages of the farmer, has been so little attended to, is the difficulty which is constantly experienced from the want of a sufficient number of expert and proper persons to perform the operation. Such persons are far from being common in any, much less in every district, as some knowledge, of a nature which is not readily acquired, and much experience in the practice of cutting, are indispensably necessary to the success of the undertaking. When, however, the utility and benefits of the practice become better understood and more fully appreciated by the farmer, and the operators more numerous, greater attention and importance will be bestowed upon it; as it is capable of relieving him from much trouble, of greatly promoting his profits, and of benefiting him in various ways. The facts are since well proved and ascertained, that animals which have undergone this operation are more disposed to take on flesh, more quiet in their habits, and capable of being managed with much greater ease and facility in any way whatever, than they were before the operation was performed. It may also have advantages in other ways in different sorts of animals; it may render the filly nearly equal to the gelded colt for several different uses; and the heifer nearly equal to the ox for all sorts of farm labor. The females of some other sorts of animals may likewise, by this means, be made to nearly equal the castrated males in usefulness for a variety of purposes and intentions, and in all cases be rendered a good deal more valuable, or manageable, than they are at present." VARIOUS BREEDS OF SWINE. BERKSHIRE BREED.