1. The prompt and permanent healing of chronic pyogenic osteomyelitis is immperative, in order to prevent the many serious complications and sequelae and to permit early reconstructive surgery, when necessary.

2. With the present-day bacteriostatic drugs, more radical surgery can be accomplished without danger to life or limb.

3. Sixty-four separate foci of chronic osteomyelitis in sixty-one male patients, between eighteen and thirty-seven years of age, have been treated during the past sixteen months.

4. Early healing (within ten weeks) occurred in 78.1 per cent. Including the eight cases in the iliac-graft series, in which healing was delayed over the ten-week period, and the one case in which re-excision was necessitated by a secondary sequestration, complete healing occurred in 93.7 per cent.

5. The method used and advocated is founded upon the principle of complete excision of an infected and avascular tissue, obliteration of the "dead" space, and wound closure. Whenever possible, obliterating the dead space with viable muscle has been the method of choice, since 97.7 per cent. of the wounds in this group healed promptly. Bonegrafting should be done later, if necessary, to reinforce any bone weakness. In the calcaneus, the anterior surface of the tibia, and the radial styloid, obliterating the dead space with grafts of cancellous iliac bone has shown definite merit and has been time saving.