Whenever a mortification attacks any part of the body, whether it be owing to an outward hurt, or proceeds from an internal cause, as often happens in persons afflicted with the scurvy, dropsy, a vitiated state of the blood, phagedenic sores, or very aged people, who begin, as it were, to die in the extremities: Whenever, I say, the mortification begins to appear, it requires immediate help. We must begin by making incisions on the part affected, in order to procure a discharge of the corrupted matter, and to assist the action of the medicines. I make long incisions, not only on the mortified parts, but on those adjacent, which would soon be so; I make several of them, as nearly as the large trunks of the blood vessels, and more considerable branches of nerves will allow, not above an inch distant from each other. We ought always to cut to the quick; and if the bone be affected, the periosteum must be cut through, and the bone laid bare. These incisions should follow the direction of the greater number of fibres of the muscles that happen to be thus cut upon; but when the gastrocnemii, the glutei or deltoid muscles have been wounded by a ball, they must be cut cross-ways, otherwise convulsions, particularly the spasmus cynicus, will probably ensue. Several aponeuroses, especially that of the biceps, ought likewise to be cut transversally: It is true, if the longitudinal incisions are sufficiently long and numerous, they take off the tension of these membranes so much as to render the transversal ones unnecessary. Neither ought the tendons to be spared; they must be boldly cut through transversally. If a wound, or any other ailment, happens near the articulations, I also, without fear, make large incisions through the ligaments. It will easily be understood that these incisions must differ from each other in length and depth; they must be longer in those parts of the sore where the disease has spread the widest, and shorter in others. Both must be more superficial at their extremities, and deeper in the middle, in the place where the complaint began, and where the mortification reaches deepest. The number of incisions, and their distance, must also vary, as they may be found necessary; so that a skilful surgeon may make three, four, six or eight, as the case may require. It is obvious, that in an operation of this kind, a surgeon should not be too precipitate; and when he does not know the depth of the ailment, he should not go too deep with his incision: he may repeat it if he finds he has not reached the quick. SECT. IX.