36 
J. D. NIGHBERT. 
dined to think that this condition arises in a great many cases 
from some gastric disturbance depending on disturbed nutrition 
and the circulation of impure blood through the cranial struc¬ 
tures. 
After somewhat prolonged exercise a profuse perspiration is 
noticed,.and if exercise is continued this will soon cease and the 
animal becomes dry ; then will be noticed an inability or lag¬ 
ging in harness, and on being brought to a standstill there will 
be some uneasiness, with spasm of the diaphragm and slight 
colicy pains, which soon pass away, followed by an inclination 
to wander around the inclosure or stall. At this stage may be 
noticed a slight turning up of the upper lip, owing to spasm of 
the levators of the lip, being in a tonic state, and the masseters 
are soon in the same condition. While the temporals are also 
involved, they maintain a clonic condition .throughout the 
attack. Breathing is accelerated, the heart beats rapidly, but 
the pulse at the jaw is almost imperceptible ; temperature high, 
varying from 105 to 108 0 F. After the initiatory stage the 
power of deglutition is lost. The duration of this condition is 
from a few to twenty-four hours. 
Case /.—Aged roan mare, taken from pasture and put to 
work on a very warm day. About the middle of the afternoon 
she was noticed to be sweating profusely and inclined to stag¬ 
ger, and after resting a few minutes refused to go when spoken 
to. She was taken out and I was sent for. I found the patient 
as follows: Sweating considerably, hurried breathing, nostrils 
dilated, heart beating rapidly, pulse almost imperceptible, well 
marked spasm of diaphragm, mare wandering around, gait 
stilty, masseters in tonic spasm, temporals clonic, upper lip 
turned up and levators in tonic spasm, temperature 106° F. ; 
unable to drink, would put her nose almost up to the eyes in 
water-bucket in vain attempt to get a swallow of water. Treat¬ 
ment.—A liberal abstraction of blood from the jugular, a hypo¬ 
dermic injection of atropine, and had the patient taken to shade, 
cold water continually applied to poll. I left one ounce potas¬ 
sium nitrate to be given in drinking water as soon as patient 
