REPORTS OF CASES. 
447 
end of July, when the owner had him brought to the hospital in 
an ambulance. 
Condition at Admission .—The animal being unable to back 
from the conveyance in which he was moved, was turned and 
led out. He was a fine looking colt, and in good condition. In 
walking, he carried his off hind leg in excessive extension, back¬ 
wards first, then by a sudden movement in abduction, bringing it 
forward without any flexion of the leg below the coxo-femoral 
articulation. The muscles of the anterior crural region, and espec¬ 
ially the fascia lata, seemed atrophied. Those of the gluteal were 
much smaller on that side. As the animal arrived late in the 
evening, he was placed in a stall and left until the next morning 
for more careful examination. 
On the 29th, he was with difficulty backed, or rather pushed 
back from his stall. He was in the same condition, had not laid 
down during the night. The off leg was then seized by an assis¬ 
tant, brought well forward, and held in that position while by 
manipulations and pressure upon the external face of the patella 
from behind forwards, the bone was felt slipping from under 
the hand, and with a sharp cracking sound returned to its place. 
The leg flexed suddenly, and the animal led forward moved freely 
with perfect flexion of the stifle joint: but as soon as the pressure 
of the hand ceased, and the animal had made but two or 
three steps, the same condition returned, of extension and of ina¬ 
bility to walk. This was repeated several times with like results. 
The ordinary simple treatment of hot fomentations being con¬ 
sidered of little advantage in a case of such standing, a severe 
blister was applied all over the joint, extending a good distance 
all around. The effects of the application seemed to be at first 
satisfactory*. An enormous swelling took place ; the scabs of the 
blister formed a firm bandage, but the result was nevertheless 
negative. No improvement was obtained; the leg remained in 
the same condition, perhaps a little worse, as it then became very 
difficult to obtain a temporary reduction of the dislocation, as 
had been done at first. Having been allowed to walk loose in a 
large box stall to wait the removal of the scabs of the blister, he 
was on the 15th of August returned to a single stall, and hobbles 
