246 Diseases of Bone. 



quarter inch to one inch and a quarter in thickness, is chiefly 

 formed of porous bone, but it is more condensed externally, 

 and is densely compact where it joins the shaft. At the upper 

 end the wall itself has been the seat of one or two small 

 abscesses. The outer surface of the expanded portion and of the 

 shaft below is thrown into the irregular plates characteristic of 

 chronic periosteal irritation. The fibula has a few bony spicules 

 upon its inner surface, but it is chiefly remarkable in having 

 been gradually flattened out, and bent so as to fit on to the 

 adjacent surface of the expanded tibia. 



The cavity has evidently been formed by new growth on 

 the outer surface, with absorption from within. G. C. 1219. 

 Presented hy Professor James Russell. 



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

 Tibia from an Abscess in the Interior. — The other half 



of the foregoing specimen — in spirit, illustrating the above. 



This specimen shows the abscess cavity lined with granula- 

 tions, also the plug of wood and tow alluded to in the history 

 of the case, as when the patient wore it. G. C. 1218. 



Presented by Professor James Russell. 



6. 102a. Oil painting of the preceding preparations in their recent 

 state. F. P. C. 15. a. 



e. Where the chief changes are in the form of necrosis or death 

 of a palpable portion. 



(a.) Where the dead piece has been in j^rocess of separation. 



6. 103. Acute Suppurative Osteo-myelitis and Periostitis of 



the Tibia^NecrOSiS. — Portion of the tibia of a boy, with 

 adjacent soft parts — injected and in spirit, to illustrate the above. 

 The patient, a boy aged 12 years, had suffered from an inflammation 

 considered to be erysipelatous, following exposure to cold. "In conse- 



