486 Diseases of Joints. 



margins of the furrow being irregular. Round the articular 

 margin the cartilage has been slightly absorbed by the synovial 

 membrane, and the affected surface as well as the margins of 

 the furrow have been vascular and are injected. One or two 

 patches of the injection are seen upon the cartilage of the 

 femur. The depression on the cartilaginous surface of the 

 trochlea was probably done accidentally while preparing the 

 specimen. The joint otherwise may be considered normal. 



G. C. 3201. 

 Presented by Charles W. Cathcart, F.R.C.S.E. 



7. 157. Early Stag-e of Arthritis Deformans(?).— Left knee- 

 joint of an adult — injected and laid open from the front — in 

 spirit, showing changes in the cartilage and synovial membrane. 

 The patient had many chalk stones in dififerent parts of his body. 

 The cartilage on the trochlear surface of the femur is 

 deficient at the centre, and over the condylar surface on both 

 sides it shoAvs numerous small nodules. The cartilaginous 

 surface of the patella is irregularly eroded round the margin, 

 and has lost its smoothness over the rest of the surface. The 

 synovial membrane round the patella and on the femur presents 

 numerous finely fringed processes; B. C. ii. M, 14. 



7. 158. Early Stagre of Arthritis Deformans.— A left knee- 

 joint laid open by throwing down the patella — in spirit, 

 showing changes chiefly in the cartilage. 



The specimen is from a woman aged 62, whose limb was amputated 

 for senile gangrene. 



The articular margin of the femur has begun to enlarge, 

 and forms an irregular shelf projecting beyond the surface of 

 the condyle. There is a small patch of ebumated bone at the 

 upper and outer part of the trochlear surface, and below it the 

 cartilage is shreddy, i.e., is in the stage which precedes ebur- 



