DISEASES OF THE BONES AIs^D AETICULATIONS. 



EXPLANATION OF PHOTO-LITHOGRAPH, PLATE I. 



1. Fragilitus Ossium, -with fracture tkrougli the body of tlie four- 

 teenth dorsal vertebra. (1.) Large fragile osseous tumour. (2.) Line 

 of fracture. 



2. Eheumatoid Disease of Hip-Joint. (1.) Cotyloid cavity, show- 

 ing porcellaneous deposit. (2.) and (3.) Addimentary bones, partially 

 filling up the foramen ovale. 



3. Diseased Condition of the Os Calcis and Astragalus, pro- 

 duced by repeated bruising, the animal from which it was obtained 

 being a vicious kicker. 



4. Osteophytes. Through the centre of the mass a canal is left for 

 the passage of the flexor tendons, blood-vessels, and nerves. 



5. Ossification of the Flexor Brachii in chronic shoulder lame- 



6. Necrosis Totalis of the Scapula. (1.) and (3.) show large 

 cloacae or foramina grandia. (2.) represents the sequestral capsule. 

 The specimen from which this figure was taken was highly prized by 

 Professor Dick. 



7. Caries of Superior Maxillary Bone and alveolar processes, 

 arising from disease of the two anterior molar teeth. 



8. True Mollities Ossium, or softening of bone, by absorption of 

 the eartliy salts, without alteration in animal basis. Case described 

 in the text. 



9. Actinomycosis (Ostbo-Sarcoma). Lower jaw of ox, the hollow 

 spaces in the specimen, when fresh, being filled by sarcous material. 



