Bone Abscess. 243 



the history of the case seems to point sufficiently clearly to the 

 agency of pus-forming organisms. G. C. 1119. 



Presented by Sir George Ballingall. 



6. 99. Disease of the Astrag^alus and Fatty Degeneration 

 of the other Tarsal Bones, secondary to the above 



Condition of the Tibia. — Bones of the right foot from the 

 same patient as the last specimen — macerated, to show the 

 above. 



" The whole bones of the foot, although not showing 

 much disease, were so extremely soft and pulpy as scarcely to 

 admit of articulation. They could have been cut across in all 

 directions with a common scalpel without turning its edge." 



The articular surface of the astragalus seems to have been 

 affected more from the anchylosis than from the actual dis- 

 ease. Some of the roughness on it may have been caused in 

 process of preparation. G. C. 1119. 



Presented Inj Sir George Ballingall. 



6. 100. Abscess and Chronic Ostitis in the Lower End of 



the Tibia. — Lower part of a right tibia in section — macerated, 

 illustrating the above. 



The bone is greatly thickened, owing to new formation 

 of cancellated tissue. The large cavity at the upper part is 

 continuous Avith the medullary canal. A small cavity seen 

 below on the front section has its walls formed of condensed 

 bone. This condition has apparently been the result of chronic 

 septic osteo-myelitis in the lower end of the bone, ending in 

 suppuration in one or two places. W. C. G. 14. 



6. 101. Enormous Enlarg-ement of the Upper End of the 

 Tibia, from Abscesses in the Interior.— Section of a 



