PURPURA HEMORRHAGICA IN THE OX. 385 
ment, and that not only with one, but both patellae, although 
the off-limb had not been previously affected. 
With the continual aid of the whip, the horse was removed 
to the cavalry sick-lines, a distance of about three quarters 
of a mile, not however, without much patience and perse- 
verance, for either one or the other of the patellae slipped out 
at every few steps. 
The actual cautery was now applied over both stifle joints, 
the animal not being allowed to lie down for some time ; the 
hindlegs were fettered, and every precaution was taken to pre- 
serve perfect stillness. All went on satisfactorily, and at the 
expiration of five weeks the horse was returned to his owner. 
From that time to the present, he has been constantly ridden 
at? all paces, also hunted frequently, and has not had one 
return of his old affection. The horse, when purchased, was 
a remarkably stout, strong, muscular animal, but became re- 
duced after castration, which was most likely one cause at 
least, of the luxations taking place. 
I cannot at present subscribe to the belief, that the man- 
ner in which horses are usually picketed in India, their hind 
legs being fastened with “heel ropes,” superinduces this 
particular dislocation. I have seen some hundreds of horses 
thus tied up ; but have never met with a single instance of 
luxation of the patella in consequence. I have likewise 
interrogated those who have been long in India, and with 
horses all their lives, and have not succeeded in tracing an 
isolated case even to such a practice. I do not assert that 
there have not been any; but I have never met with one. 
The subject of the foregoing detail was always in a loose 
box subsequent to purchase. 
I remain, &c. 
Jaulnaii; March 30 , 1856 . 
PURPURA HEMORRHAGICA IN THE OX. 
By Jos. Norris, M.R.C.V.S., Crediton. 
The subject of this disease was of the Devon breed, and 
engaged in agricultural labour. He was bred by the owmer, 
and enjoyed an uninterrupted state of good health prior to 
the 22d of March, in the present year, at which time my 
attention was first directed to him, in consequence of it 
having been stated that he had passed a fecal evacuation 
containing a sensible proportion of both pus and blood. On 
