DISEASES OF THE BOI^ES AITD AETICULATIONS. 



EXPLANATION OF PHOTO-LITHOGRAPH, PLATE I. 



1. Eragilitus Ossium, with fracture througli the body of the foui'- 

 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 op the Flexor Brachii in chronic shoulder lame- 

 ness. 



6. Necrosis Totalis op 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 priced by 

 Professor Dick. 



7. Caries op 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 earthy salts, without alteration in animal basis. Case described 

 in the text. 



9. Osteo-Sarcoma. Lower jaw of ox, the hollow spaces in the 

 specimen, when fresh, being fiUed by sarcous material. 



