REPORTS OF CASES. 
255 
animal in the United States Army. She was heavily packed 
with grain ane morning and started out with a surveying party 
on a trip across the country. After going about 20 miles she 
ran into an alkali mire, which are very numerous in this 
country, and immediately sank in up to the belly. Her load 
was removed, and, after much struggling, she finally managed 
to drag herself out. It was then discovered that she was unable 
to walk or bear any weight on the left hind leg. The officer in 
command of the party, not knowing the nature of the trouble, 
ordered her turned over to a ranchman near by for safe keeping, 
thinking that on their re¬ 
turn trip she would be all 
right again and able to be 
brought back to the fort. 
Thirty-five days later the 
party returned and found 
the mule still very lame, 
but able to hobble along. 
She was driven into the 
fort in this condition and 
turned over to me for treat¬ 
ment. She presented the 
following symptoms: Uimh 
shortened and fixed in a po¬ 
sition of adduction. While 
standing the affected limb 
hung directly across and in front of the opposite one ; upper 
trochanter very prominent; skin over hip joint very tense. The 
mobility of the limb was very limited, especially in the forward 
direction. 
A diagnosis of dislocation of the hip joint was made. The 
prognosis, of course, was unfavorable, and as the animal was per¬ 
fectly useless I recommended that she be killed, which was 
done. Post-mortem examination revealed a supra-luxation of 
the hip joint. The head of the femur had been forced out of its 
socket and was lying about four inches above the cup of the 
joint, where it had formed a false articulation among the mus¬ 
cles of the hip. The original joint cavity was completely filled 
with a quantity of tough, white, fibrous tissue. The accom¬ 
panying photo shows the position of the limb while standing. 
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