292 " Diseases of Bone. 



6. 236. Healed Tubercular Disease of the Bodies of Verte- 

 brae. — Section of the lower six dorsal vertebrae — macerated, 

 illustrating the above. 



The bodies of the eighth, ninth, and tenth vertebrae are 

 greatly absorbed, and are infused into one mass of cancellated 

 bone, with only a perceptible trace of the original inter-vertebral 

 discs. The other bodies have been more or less anchylosed on 

 the external surface, and the lamina; and spines of the vertebrae 

 whose bodies are blended are fused together likewise. The 

 specimen shows how completely a tubercular affection of bone' 

 may heal. B. C, i. 3. M. 62, 



6. Inflammation of Bone due to Syphilis. A. The SkulL 



a. Where the chief changes are in the form of rarefaction, 

 i.e. a syphilitic form of caries. 



(«. ) Where the process of rarefaction has been advancing. 



6. 237. Syphilitic Disease of the Skull. — Skull-cap apparently 



of an old man — macerated, illustrating the above. 



There are patches of opened-out bone ("caries") near the 

 vertex. These patches seem to be due to localised increased 

 vascularity, the opened-out vascular channels in places running 

 together, and forming deficiencies on the surface. The greater 

 part of the vault of the skull is otherwise unchanged, excepting 

 for a slight porosity of the frontal bone. The interior of the 

 skull-cap shows, near the vertex, marks of considerable vas- 

 cularity, both in grooves for larger vessels and in pores for 

 smaller ones. There is some irregularity also near the coronal 

 suture. The sagittal suture is entirely obliterated, and the 

 coronal suture nearly so. F. P. C. 291. 



Presented by Professor John Thomson. 



6. 238. Syphilitic Disease of the Skull.— Skull-cap of an 



elderly person — macerated, illustrating the above. 



There are traces of syphilitic disease on the outside, and 



