Sequestra after Necrosis from Pus-forming Organisms. 263 



The bone shows the mark of a trephine. The irregularity 

 of the margins is characteristic of the natural process of 

 separation. G. C. 1162. 



Presented by Professor James Russell. 



6. 147. Sequestrum, after Acute Suppurative Osteo- 

 myelitis. — Portion of the shaft of a long bone, illustrating the 

 above. 



There is great irregularity on every aspect. G. C. 3354. 



6. 148. Sequestrum, after Acute Suppurative Osteo- 

 myelitis of the Tibia. — Portion of the shaft of a tibia, 

 illustrating the above. 



The separation has been mostly from without. 



G. C. 1174. 

 Presented by Professor James Russell. 



6. 149. Sequestrum, after Acute Suppurative Osteo- 

 myelitis of the Tibia. — Two portions of cancellous tissue 

 said to be from the tibia of a boy 1 2 years of age. 



A cast of the leg and foot, after cure in this case was 

 completed, was presented to the Museum along with this 

 specimen, but it cannot now be traced (1893). G. C. 1786. 



6. 150. Sequestra, after Acute Suppurative Osteo- 

 myelitis. — Eleven portions of the shafts of long bones, 

 illustrating the above. 



They show the usual characters. One piece has evidently 

 followed amputation. The others seem, like the previous 

 specimens, to have been idiophic. G. C. 1170. 



Presented by Professor James Russell. 



