44 
Mr. Brodie’s Experiments on the 
Experiment 7. 
I procured two large full grown rabbits, of the same colour, 
and so nearly equal in size, that 110 difference could be de- 
tected by the eye. 
The temperature of the room was 57 0 , and the heat in the 
rectum of each rabbit previous to the experiment was 100^-. 
I divided the spinal marrow in one of them, produced arti- 
ficial respiration, and removed the head after having secured 
the vessels in the neck. The artificial respirations were made 
about 35 times in a minute. 
During the first hour, the heart contracted 144 times in a 
minute. 
At the end of an hour and a quarter the pulse had fallen to 
136 in a minute, and it continued the same at the end of an 
hour and a half. At the end of an hour and forty minutes the 
pulse had fallen to go in a minute, and the artificial respir- 
ation was not continued after this period. 
Half an hour after the spinal marrow was divided, the heat 
in the rectum had fallen to 97 0 . 
At 45 minutes the heat was 95^. 
At the end of an hour the heat in the rectum was 94 0 . 
At an hour and a quarter it was 92 0 . 
At an hour and a half it was 91 0 . 
At an hour and forty minutes, the heat in the rectum was 
gojr, and in the thorax, within the bag of the pericardium, the 
heat was 87^-. 
The temperature of the room being the same, the second 
rabbit was killed by dividing the spinal marrow' , and the tem- 
perature was examined at corresponding periods. 
