444 Diseases of Joints. 



red glass rod, while green and blue rods show where the same 

 abscess communicated with the diseased joint and the bone. 



G. C. 2801. a. 

 Presented by P. H. MacLaren, F.R.C.S.E. 



7. 42. Tubercular Synovitis involving* the Bone.— Portion 



of the head of the tibia from the previous case — macerated. 



It shows the eroded spaces on the head of the tibia. There 

 is no periosteal new bone. G. C. 2801. b. 



Presented by P. H. MacLaeex, F.R.C.S.E. 



7. 43. Advanced Tubercular Synovitis in a Child.— Section 

 of the knee-joint of a child — -in spirit, to illustrate the above. 



The bones were softened and the knee flexed. The speci- 

 men, however, does not show much now. G. C. 2168. 

 Presented by Benjamin Bell, jun,, F.R.C.S.E. 



Series of macerated bone preparations from Tubercular knee-joints, illustrating 

 changes secondary to disease in the synovial membrane, 



7. 44. Invasion of Articular Surfaces from Tubercular 

 Synovitis. — Bones of a left knee-joint from a case of tuber- 

 cular synovitis. 



The articular surface has been attacked in the neighbour- 

 hood of the inter-condyloid notch, and at the back of both 

 condyles, the outer especially. The bone is somewhat 

 roughened on the side of the inner condyle, and slightly eroded 

 upon the front of the outer condyle, but there is little change 

 in the substance of the bone itself, which is very dense and 

 heavy. The articular surface of the tibia is scarcely altered, 

 but at places the bone is somewhat roughened. 



G. C. 733. 

 Presented by Sir George Ballinoall. 



