OSSIFICATION OF THE CARTILAGES OF THE EAR. 465 
from the post. It was covered with hair, which exactly corre- 
sponded in colour with that of the cow, and it was of precisely the 
same height of the apparently bruised part. I inquired about 
this, and one of the men said that another cow pushed this one, 
a few days before, with very considerable violence against the end 
of this rail, as she hurried through the gateway, which was very 
narrow. From some such accidental circumstance, the whole of 
these cases might have proceeded. 
THE USE OF HYDROCYANIC ACID IN TETANUS. 
By the same. 
1 WAS glad to see a communication from Mr. St. Clair, confirma- 
tory of my opinion of the sedative effects of Hydrocyanic Acid in 
Tetanus, as recorded in the 10th volume of The VETERINARIAN, 
p. 248. Although his method of employing it varies a little from 
mine, and he has not stated the source whence he derived the hint 
of using it, I am much gratified by his account of the experi- 
ments which he has instituted. It is nearly thirteen years since I 
began to have recourse to Hydrocyanic Acid in these cases, and I 
was not aware until 1 saw those experiments of Mr. St. Clair, 
that any one had been pursuing the same course. I hope that the 
result will be as satisfactory to him as it has been to me. 
OSSIFICATION OF THE CARTILAGES OF THE EAR, 
AND THE MODE OF CURE. 
By Mr. Joseph Carlisle, V.S., Wig ton, Cumberland. 
On the 5th December 1838, I was requested to examine a grey 
mare, the property of a miller, who informed me that her ears had 
degenerated into bone. On examination, I found this to be the 
case. The ossification had gone on to a great extent., particularly 
about the base of the ear; and the annular cartilage had become so 
hard and osseous that a common observer might call it a process of 
the cranium. The deposition had made such rapid progress in 
those parts, that the whole cartilaginous structure of the ear was 
completely involved, and its free and elastic property totally de- 
stroyed. The beginning of the meatus auditorius externus was 
completely obstructed and plugged up. 
No cause could be assigned, excepting that, when two years 
old, the mare had received an injury in the eye, and it was 
necessary to apply the twitch freely to the ear, in consequence of 
