254 Diseases of Bone. 



from the adjacent bone. The new shell has been too imperfect 

 to have been functionally useful, B. C. i. 5. M. 41. 



See Sir Charles Bell on " Spine and Thigh Bone," plate v. fig. 2. 



6. 119. Acute Suppurative Osteomyelitis of the Femur- 

 Necrosis. — Portion of a femur — macerated, to show the above. 

 A rough piece of necrosed bone is surrounded by a nearly 

 complete case of irregular new bone. At one part the new case 

 is deficient and the sequestrum exposed. At other places 

 cloacae are seen. On the side opposite the deficiency an attempt 

 was made to destroy the new bone by the actual cautery, in order 

 to remove the sequestrum. The black burned part has no 

 doubt been killed, and has been in process of separation from 

 the rest as is indicated by the sulcus round it. 



B. C. I. 5. M. 33. 



6. 120. Acute Suppurative Osteo-myelitis— Necrosis, 



Chronic Enlargfement. — Section of a part of a femur — 

 macerated, illustrating the above. 



The new bone in most places is as dense as ivory, while at 

 other parts it is cancellous. Several cloacal apertures communi- 

 cate between the surface and the cavities within. In one of 

 these cavities a loose fragment of dead bone is seen. The 

 others have probably contained similar fragments, which have 

 dropped out. The walls of the cavities are porous, and might 

 be called carious. They have been covered with granulations, 

 from which suppuration has come. The outer surface of the 

 bone presents the usual irregular character seen in such cases 

 due to the active development of new periosteal bone. 



This specimen shows by the density of the new bone how 

 extremely difficult it is in some cases to remove enclosed 

 sequestra. B. C. i. 5. M. 40. 



