516 



THE DISEASES OF THE HORSE 



EXOSTOSIS OF THE HUMERUS AND SCAPULA 



The heads of the boxes adjacent to most of the joints of the body are 

 more or less subject to exostosis, though not so fi^equently as those of the 

 pastern-bones and tarsus. Next to these probably comes the shoulder joint, 

 the neighbourhood of which is often the scat of this disease, but seldom to 



Fio. 06.— ASCII 



A. Soapula. 



B. Humerus. 



C. D. Exostosis around the sliuilder joint producing 

 auclolosis. 



the extent shown in the case from which the accompanying engraving is 

 taken. It represents the left scapula and humerus of a horse, which were 

 completely anchylosed, and of course there co-existed a proportionate amount 

 of lameness during the progress of the disease, while after the anchylosis 

 took place the want of action must have been complete. An examination 

 by the hand of the point of the shoulder would readily detect so large a 

 growth of bone as this ; but smaller ones are occasionally thrown out beneath 



