Before the disease has become very extensive in the scalp, and when it is still limited to the superficial parts, it may be removed by the knife; the incisions being made at a considerable distance from the margins of the ulcer, so that those parts which may be supposed to have assumed a disposition to malignant action, may be taken away along with the ulcer. In more advanced cases, it may be necessary that the incisions should extend in depth to the bone; and it may be prudent to insist on a portion of the bone exfoliating, the periosteum being removed, and some potential cautery applied to the exposed surface,—as the alumen ustum, oxydum hydrargyri rubrum, &c. The actual cautery cannot be applied with safety to the cranium. Even where the integuments only are removed, and that to a small extent, and in a proper form, it is vain to think of approximating the parts and procuring union by adhesion; the wound must granulate. There is no difficulty in suppressing hemorrhage; either ligature or temporary pressure may be employed according to circumstances. Mild dressings are to be applied, and proper support afforded. The parts should be kept clean, and for that purpose the surrounding scalp must be shaved repeatedly. _Tumours of the Scalp._—Tumours of a sarcomatous nature are seldom met with in this situation, but the adipose are not so unfrequent. The latter are easily removed, being seldom of large size, and their attachments being loose, unless when they have been irritated by accident or maltreatment. When sarcomatous growths do occur, they are to be excised, with those precautions which were formerly mentioned when treating of tumours generally.