Suppurative Arthritis. 425 



This change is common in the joints of old people, and 

 may exist without other appreciable alteration. A change 

 almost identical with it is seen at an early stage of arthritis 

 deformans, but is there associated with certain other changes. 

 (See specimens illustrating arthritis deformans, itself a disease of 

 advancing years.) W. C. H. 42. 



7. 3. Chang-es in Cartilage from Disease and Abnormal 

 Pressure . — Articular end of a right femur, arteries injected 

 with coarse injection- — in spirit, illustrating the above. 



' ' The patient had suffered amputation of leg of that side some time 

 before death, and the knee was in a bent state." 



The cartilage at the lower part of the inner condyle and 

 the outer part of the outer condyle is completely absorbed, and at 

 other places it is thinned, probably owing to pressure of the soft 

 parts upon the exposed articular surface. W. C. H. 64. 



Chang-es due to Affections of the Nervous or other Systems. 



— Specimens wanted. 



III. INFLAMMATION OF JOINTS. 



1. Where the InJIamrnation has teen due to pus-forminrj 

 organisms. 



a. Where the organisms have reached the bone or synovial membrane 

 through the circulation. 



7. 4. Acute Suppurative Inflammation of the Shoulder. — 



Right shoulder-joint of a woman, opened from above — in spirit, 

 illustrating the above. 



Six weeks before admission to the Royal Infirmary, the patient, Betty 

 Caddcll, received a fall, which injured the right shoulder. It continued 

 painful and much swollen until the period of her admission, when the 

 whole extremity was oedematous. When the swelling of the shoulder 

 was pressed, a gurgling sound was produced, as of air passing through a 



