Corns, which in man are found on the lower members, in the horse are generally witnessed only upon the fore feet. The writer has rarely seen an instance of their presence behind; but in whichever foot they appear, they must be the production of an instant, though, probably, the suppurative may be an exception; yet from these always being suddenly observed, even this species are said to be of instantaneous origin. A horse, when progressing, makes a false step; a sanguineous or sappy corn is by that faulty action established. The same horse may trot home perfectly sound, and be put into the stable for the night a healthy animal; but on the following morning it may be discovered standing on three legs. Pus may, in the interval, have been secreted, and the corn may have assumed the suppurative character. [Illustration: THE SOLE OF THE HORSE'S FOOT BEING TESTED FOR CORNS.] The manner to examine for corn is, in the first place, to mark the age of the horse; then observe if, in the trot, either leg is favored. The animal being young, splint is the common cause of uneven action; if old, corns are more generally expected; the horse is brought to a stand and the smith sent for. The man raises the fore foot, and, taking a portion of crust and sole between the teeth of the pincers, gradually increases the pressure; he thus proceeds till he has by successive trials squeezed the sole all round. If the leg, while undergoing the operation, be withdrawn near either of the nails, the ideas take a different direction to that of corn; but if the foot be held steady, the seat of corn is lastly squeezed. Should no flinching be witnessed, the examination is not esteemed satisfactory until the smith has, with a small drawing-knife, denominated a searcher, cut away a portion of the sole at the seat of corn. The sensibility will be extreme should suppurating corn be present; in that case the sole must be gradually removed until the pus is released. That being done, the shoe should be taken off and the foot put into a bran poultice. By this means the horn will be rendered more soft and the wound cleansed. The smith, on the following day, must again cut the foot, every portion of detached horn being very carefully excised.