688 
ON SOME OF THE DISEASES OF THE RESPI¬ 
RATORY ORGANS OF THE HORSE AND 
OTHER ANIMALS. 
By Professor Brown, M.R.C.V.S., London. 
[Continued from jp, 514.) 
Sounds produced during respiration, consequent 
UPON HABIT, OR UNDER THE INFLUENCE OF THE 
animal's WILL. 
Our last observations referred to those peculiar cases of 
unsoundness in which the sounds emitted by the animal 
during respiration, were either occasional, or otherwise re¬ 
quired some peculiar movements to be made before they could 
be elicited. 
In one instance it will be remembered, the horse gave 
evidence of being a “ roarer," only after being ridden over a 
fence; and in the other case, the very decided “whistler" or 
“roarer" of one day was sound the next, unsound again a 
few days afterwards, and so on repeatedly. 
However remarkable and obscure these cases may be 
deemed, and whatever explanation may be given of the 
circumstances, there was nothing to lead to the belief that 
the noise produced resulted from the exercise of the horse's 
will in either instance; nor could habit be considered to have 
anything to do with the peculiarities evinced by both the 
animals. Frequently, however, certain sounds are produced 
during respiration, of such a nature, and attended with such 
circumstances as to lead to the impression that they are 
voluntarily made, or at least are the result of habit. 
First, the noise known as “ fluttering " is most palpably 
of this kind. The horse addicted to the habit is usually, 
indeed invariably, of high courage, in horse language “ hot," 
and in his trot or canter seems to manifest his impatience by 
blowing the air through his nostrils in such a manner, that 
the false-nostrils are caused to vibrate rapidly, and a very 
curious fluttering and blowing sound results, precisely 
similar to what may be produced by blowing through the 
mouth and causing the lips to vibrate quickly at the same 
time; such a movement will soon become habitual, and as a 
proof we may advert to what doubtless most persons have 
noticed, viz. a tendency among bipeds to emit peculiar sounds 
when their attention happens to be concentrated on some 
