DISEASES OE THE JOENTa 



EXPLANATION OF PHOTO-LITHOGRAPH, PLATE H. 



1. TlHEtrMAToiD Inflammation op Shoulder-Joint, eho-wiiig por- 

 cellaneous condition of articular surface, end ossification of synovial 

 fringes. (1.) Extremity of scapula, (2.) Upper end of humerus. 



2. SoROFULOus DiSBASB OF EixBOW-JoiNT OF Ox, the lower ex- 

 tremity of humerus "being shown- (1.) Tubercular deposits repre- 

 tanted by the white spots, (2.) Destructive absorption of the cartilage 

 and bone. 



3. Rheumatoid Disease of Stifle-Joint, showing — (1.) Grooving 

 of the bone, and the porcellaneous deposit ; and (2.) The formation of 

 the addimentary bones described in. the text. 



4. Removal of Articular Cartilage and Compact Laminai* 

 liAYERS from the surfases of tibia and astragalus in a case of operv 

 joint. (1.) New ossific deposit external to the articulation. (2.) Por^ 

 tion of lamihal layer not yet removed, but which in the specimen ift 

 *' tunnelled under " by absorption. (3.) Lower end of tibia; which 

 at (4.) contains a pit-like ulcer. 



5. HoQK-JoiNT IN Rheumatoid Boo-Spavin. (1.) Grooving of arti- 

 cular surface into which the porcelain is deposited. (2.) Addimentary 

 bones, formed by ossification of the synovial fringes. 



6. Fracture of Astragalus and Bone-Spavin. (1.) Astragalus. 

 (2.) Bone-cpavin. (3.) and (4.) Metatarsal bones. 



7. Caries of the Point of Os Calcis (Capped Hock). (1.) Sup- 

 erior, and (2.) Inferior extremities of the bone. 



8. Scrofulous Inflammation of the Phalangeal Bones of Ox 

 in " Foul in the foot. (1.) and (2.) Show the contrast between an 

 ulcerated and healthy articulation. It will be noticed that although 

 the destructive process is much advanced, there is but little or no 

 attempt at repair by external deposition of bone. 



9. Tubercular or Scrofulous Inflammation of the Foot of 

 A Cow, commonly called " foul." At (1.) and (2.) are well-marked 

 GollectionB of " yellow tubercle." 



