50 
110 YAL COLLEGE OF VETERINARY SURGEONS. 
PHYSIOLOGICAL EXPERIMENTS. 
LIFE OF A HORSE SUSTAINED UNDER THE DEPRIVATION OF 
BOTH CAROTID ARTERIES AND BOTH JUGULAR VEINS. 
By the Same. 
A young vigorous horse, incurably lame, was subjected to 
my peculiar carotid operation. The carotid artery was taken 
up by ligature on one side, and upon the following day the 
carotid of the other side was taken up in a similar manner ; 
and, strange to say, the vital functions appeared to be but 
little disturbed by this outrage. The patient was well 
nursed and gruelled, and attended to for two or three days, 
when a healthy suppuration appeared from the wound, and 
I sincerely believe he would have recovered ; but upon the 
third day I also took up by ligature one of his jugular veins. 
By this, in conjunction with the deprivation of his carotids, 
his respiration became disturbed and stertorous. Upon the 
following morning 1 was astonished to find that he had 
rallied. No hemorrhage whatever had occurred from either 
of the wounds, his breathing, though somewhat quick, was 
silent and not very laboured, and his secretions and excre- 
tions appeared to be natural. As it was decided that the 
horse should be destroyed on this the fifth day, it occurred 
to me that, for the ends of science, it was expedient that he 
should lose the other jugular; and accordingly I tied it 
also, in the early part of the morning. The breathing 
became laborious immediately, with an occasional cough ; 
perspiration ensued from irritation, and the horse plunged 
considerably, but no hemorrhage occurred, and not a drop of 
blood escaped. The pulse at the heart was above 100. 
I should here observe, that casting for the operations was 
avoided in each instance, the patient having been suspended 
the whole time in slings, and otherwise supported on all 
sides by a large wooden frame-work purposely constructed. 
I expected death would quickly ensue ; but on the contrary, 
in the course of three or four hours, he became more calm, 
plunged less frequently, the breathing still hurried, though not 
quite so laborious; but the pulse at the heart was 120. At this 
stage I invited some friends, who saw him alive, minus all the 
four great vascular trunks. Twelve o’clock at night came, and 
I was sorry to fir^l him yet alive, with all his symptoms re- 
maining about the same, except that there were more frequent 
paroxysms of coughing: the pulse could not now be counted. 
