AND HIS DISEASES. 23 



. Causes. — It is generally considered to be constitutional. 

 . Symptoms. — It is easily recognised ; it is generally at- 

 tached to some cartilaginous substance. It is a hard tumour, 

 -without heat or pain on pressure, quite immovable, and on 

 passing a scalpel into it, it feels cartilaginous. 



Treatment. — If situated superficially, they can be easily 

 dissected out, being non-vascular, and seldom occurring in 

 the neighbourhood of any important blood-vessels. When 

 once properly removed, they seldom return. 



OSTEO-SAECOMA 



Is a disease which we find is not uncommon in this pro- 

 vince, especially ia working oxen. It consists of a tumour^ 

 partly fleshy, and partly bony, occurring on the jaws or 

 ribs ; but all bones are liable to it. In man it is not con- 

 sidered to be a malignant disease ; that is, it does not poison 

 the system, and when removed, it is not apt to return ; but 

 in the ox it certainly partakes of the malignant type. 



Causes. — We are inclined to consider this as a constitu- 

 tional disease of the bone ; but it is often brought on by 

 external injury, or in the jaws, by a diseased tooth. The tooth 

 being fractured or decayed, food getting into the cavity, sets 

 up irritation, and the process of disease is set agoing in the 

 bony texture. 



Symptoms. — It is easily recognised. If occurring in the 

 jaws, there is considerable enlargement both externally and 

 internally, the teeth become almost covered up in the mass 

 of fibrous fleshy-like fungus, soon loosen, and can be removed 

 without trouble by the hand. This spongy tumour is easily 

 broken, up with the finger, and bleeds freely. On pressing 

 the fungus with the finger, the bony speculse can be easily 

 felt. It frequently spreads until all the bones of the face 

 become involved in disease. Of course, he cannot eat any- 



