DISEASES OF THE JOINTS 447 
bring about a similar though less marked condition. We 
may be quite sure of this—that whenever such lesions (as, 
for example, sprain and partial rupture of the lateral liga- 
ments) do occur, and the normal position of the opposing 
bones is changed, if only slightly, that great pain and 
excessive lameness must be the result, and this with but 
little to show in the foot. Many of our cases of obscure 
foot lameness might, if capable of demonstration, turn out 
to be cases of sprain and partial dislocation of the pedal 
articulation. 
Recorded Case.—‘ The animal, a trooper of the 8th Hussars, 
was found on the morning of April 17 unable to bear any 
weight on the limb (the near hind). Cause not known— 
the heel-rope I thought at first; but on investigation I 
found the heel-rope had been on the other leg. 
*‘ Diagnosis.—Dislocation of the left os corone from the 
articulating surface of the os pedis in a backward direction. 
“Every devisable means were unsuccessful in reducing 
the limb to its natural position. The horse was thrown, 
and a strong rope, with four men pulling at it, was fastened 
round the hoof, whilst I put my knee to the back of the 
pastern, using all possible force, with one hand to the foot 
and the other to the fetlock, but all to no purpose. Next 
day other means were tried. First by throwing the horse 
and placing him on his belly, with the fore-legs stretched 
out forwards, and the hind-legs backwards. This I did so 
as to get the injured limb placed as nearly flat on the 
ground as possible, with its anterior aspect downwards. 
Then a very heavy man, with his boots off, was made to 
jump on the back of the pastern, where the prominence 
showed most; and afterwards, when these means failed, 
a strong piece of wood, well covered with leather, was 
placed (where the hollow of the heel ought to have been) 
on the most prominent part, and hit several times with a 
heavy hammer ; but all efforts were futile. 
‘ Prognosis.—Unfavourable. During the latter operations 
I had a very strong pressure applied to the hoof, and the 
horse firmly fastened in every way, and it appeared as 
