412 



DISEASES AND THEIR TREATMENT. 



thought necessary, so as to complete the union of parts. The mo- 

 \ion of the joint cannot be restored by any treatment. 



Caries of Bone. 

 Caries is generally denned to be ulceration or disintegration of 



I i!Y 



the bony texture, and is supposed to be 

 ulceration of the soft tissues ; but this is 

 not, histologically speaking, correct. We 

 find in caries the bone undergoes several 

 very marked changes. It decreases in 

 density (owing to the decrease in the pro- 

 portion of organic matter entering into 

 its composition), and presents a peculiar, 

 worm-eaten appearance, which enables us always to recognize a 

 carious bone in the dried state. (See specimens in chapters on " Na- 

 vicular- Joint Lameness " and " Laniinitis.") 



