448 Experiments on the Influence of the Brain 
periment, was 10:5. The artificial respirations were made 
to resemble the natural respirations a3 much as possible, 
both in fullness and frequency. 
At 15 minutes from the time of the spinal marrow being 
divided, the heat in the rectum had fallen to 982°. 
At the end of half an huur the heart was felt through the 
ribs, acting strongly 140 times in a minute. 
At 45 minutes the pulse was still 140; the beat in the 
rectum was 94°, 
At the end of an hour the pulse continued 140 in a mi- 
nute; the beat in the rectum was 92°; among the viscera 
of the abdomen 91°; in the thorax, between the lungs and 
pericardium, 92°. 
During the experiment, the blood in the femoral artery 
was seen to be of a bright florid colour, and that in the fe- 
moral vein of a dark colour, as usual. 
The rabbit voided urine at the. commencement of the ex- 
periment; at the end of the experiment no urine was found 
m the bladder. 
Experiment 6.—I procured two rabbits of the same co- 
Jour, but one of them was about one-fifth smaller than the 
other, [ divided the spival marrow of the larger rabbit 
between the occiput and atlas. Having secured the vessels 
in the neck, and removed the head, I kept up the circula- 
tion by means of artificial respiration as in the former ex- 
periments. The respirations were made as nearly as possi- 
ble similar to natural respirations. 
In 23 minutes after the spinal marrow was divided, the 
pulse was strong, and 130 in a minute: the ball. of the 
thermometer being placed among the viscera of the abdo- ° 
men, the mercury stood at 96°. 
At 34 minutes the pulse was 120 in a minute; the heat 
in the abdomen was 95°, ; 
At the end of an hour the pulse could not be felt; but.on 
opening the thorax the heart was found acting, but slowly 
and feebly. ‘The heat in the abdomen was 91°; and be- 
tween the lobes of the right lung 88% ‘ 
During the experiment, the blood in the arteries and 
veins was seen to haye its usual colour. 
In this therefore, as in the preceding experiments, the 
heat of the animal sunk rapidly, notwithstanding the con- 
tinuance of the respiration. In order to ascertain whether 
any heat at all was generated by this process, I made the 
following comparative experiment. , The temperature of 
the room being the same, I killed the smaller rabbit by 
dividing 
