CONTRIBUTIONS TO VETERINARY PATHOLOGY. 673 
buretted hydrogen gas to the extent Mr. Bartlett supposes, it would 
have produced asphyxia, or -at least stupor, and they would all have 
exhibited symptoms of disease. The fungoid theory I am inclined 
to view suspiciously : it is an easy means of escape when no other 
presents itself. Potato rot, cholera, indeed every thing mysterious 
and inexplicable, is at once set down to microscopic fungi. My 
lengthy communication forbids my making further comment, 
though I cannot help thinking that we are as far off the true solu- 
tion of the mystery as ever. 
I remain, Sir, 
Your’s obediently. 
West-street, Tavistock, 
Oct. 19th, 1850. 
CONTRIBUTIONS TO VETERINARY PATHOLOGY. 
By Wm. Smith, M.R.C. V.S., Veterinary Establishment , 
Norwich. 
Fourth Contribution. 
Dislocation of the Fetlock Joint , and Rupture of its external 
Lateral Ligaments. 
History. — The subject of this injury is a pony about twelve 
hands high, stoutly formed, with short strong joints. The person 
who had charge of him, on entering the stable early on the morning 
of the 21st of August, 1842, perceived by his appearance, and the 
disordered state of the place, that something unusual had occurred 
during the previous night. 
The animal was covered with a cold perspiration, breathing 
quickly, and indicating other symptoms of uneasiness ; and he im- 
formed me that, upon attempting to move him in his stall, the 
fetlock of the near hind leg gave way, it was bent under him, and 
turned inwards. He lost no time, therefore, in sending a message 
to me to attend, which I did promptly ; and after hearing the 
foregoing statement, was surprised to find him standing tolerably 
firmly and naturally on this extremity. His present condition did 
not confirm the man’s account of the matter, although eventually 
it was fully borne out. 
Upon examining the fetlock joint, I found it swollen and con- 
tused ; portions of the hair off, and the skin covering the joint 
