influence of the Brain on the Action of the Heart, &c. 41 
Experiment 4. 
The experiment was repeated on a dog of a small size, 
whose pulse was from 130 to 140 in a minute, and whose 
respirations, as far as I could judge, were performed from 30 
to 35 times in a minute. 
The temperature of the room was (S3 0 . The heat in the 
rectum of the animal at the commencement of the experiment 
was 93 0 . The artificial inspirations were made to correspond 
as nearly as possible to the natural inspirations both in full- 
ness and frequency. 
At 20 minutes from the time of the dog being pithed, the 
heart acted 140 times in a minute with as much strength and 
regularity as before : the heat in the rectum had fallen to g6f 
At 40 minutes the pulse was still 140 in a minute : the heat 
in the rectum g2j. 
At 55 minutes the pulse was 112, and the heat in the 
rectum 90°. 
At one hour and 10 minutes the pulse beat 90 in a minute, 
and the heat in the rectum was 88°. 
At one hour and 25 minutes the pulse had sunk to 30, and 
the heat in the rectum was 85°. The bulb of the thermometer 
being placed in the bag of the pericardium, the mercury stood 
at 85°, but among the viscera of the abdomen it rose to 87-5-- 
During the experiment there were frequent and violent 
contractions of the voluntary muscles, and an hour after the 
experiment was begun, there was an evacuation of fasces. 
Experiment 3. 
The experiment was repeated on a rabbit, whose respira- 
tions, as far as I could judge, were from 30 to 40 in a minute, 
and whose pulse varied from 130 to 140 in a minute. The 
mdcccxi. G 
