ULCERATIVE DISEASE OF JOINTS. 45 



the exertion of the animal keeping up, for several hours together, 

 increased action in circulation." 



Never having had an opportunity of making any observations 

 on this formidable disease of the joints of the young animals, we 

 can do no more than refer such of our readers as may desire farther 

 information to Mr. Pritchard's instructive paper (in The Veteri- 

 narian for 1832). We have introduced the subject here because 

 we think it comes fairly under the heading of rheumatic inflam- 

 7natian of the joints ; of which, in point of fact, as it appears to us, 

 it is a form peculiar to foal-hood. 



Ulcerative Disease of Joints. 



As far as our observations have hitherto gone, there would 

 appear to be three different kinds of inflammation of joints ; viz. 

 1, that which is the result of what goes by the name of " an open 

 joint," to which, for distinction's sake, we may apply the epithet 

 traumatic; 2, that which we have called rheumatic, or metastatic ; 

 3, that which is prone to take on the character of ulceration, and 

 from that circumstance may be denominated the ulcerative. Hav- 

 ing considered the two former, our present affair is with the latter. 



Tn their investigations into the causes and nature of lamenesses 

 there was between the old and modern school of farriery this essen- 

 tial difference ; — that while the farriers, for the most part ignorant 

 of anatomy and physiology, confined their observation to the exter- 

 nal changes or alterations of parts, veterinarians, brought up in a 

 knowledge of those sciences, have extended their inquiries into the 

 internal structures, and have there made discoveries which, al- 

 though their existence might have been casually known to some 

 of their professional ancestors, were certainly not by them, as by 

 us, connected with the ordinary causation of lameness. So long 

 ago as the year 1828, Mr. Jas. Turner, veterinary surgeon, of Re- 

 gent Street, London, discovered the cause of what is called " groggy 

 lameness," to be ulcerative disease of the navicular joint; and in 

 the year 1830, Mr. Goodwin, veterinary surgeon to her Majesty's 

 establishment, made a similar discovery in regard to spavin ; and 



