in the end to secure complete closure. A sinus with an unhealthy discharge may be inferred to be prone to cancerous development. WThile the grafted surface might not withstand much traumatism, were it exposed, it is now sound and is so protected as to be little liable to mishap. To have undertaken to fill the cavity by decalcified bone chips or sponge, would probably have resulted in failure. While this large defect remained aseptic under the treatment instituted, the large quantity of bone

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... s and blood clots necessary, would doubtless have been too favorable a medium for lurking germs. When this case was exhibited, the question arose as to the strength of the bone. The prolonged osteomyelitis had so thickened the compact layer as to render it sufficiently strong. But the large surface underlying the exposed semilunar cartilages (the entire cancella having been removed from the upper half of the bone), indicated that there would be a point of weakness, but later granulations so limited this area as to leave no room for apprehension. A recent letter states that the cavity has much reduced since the patient has returned to his home. The photograph I present with the article does not do justice to the size of the cavity, which is fully three cm. deep.