4 ON THE INFLUENCE 



This experiment confirmed the expectation 

 that the action of the heart might be made to 

 continue after the brain was removed, but at 

 the same time tended to show that, under these 

 circumstances, there was a suspension of the 

 secretion of urine. It appeared, however, de- 

 sirable that the experiment should be repeated, 

 and it occurred to me that in repeating it. it 

 would be well to ascertain whether, under the 

 same circumstances, the animal heat was main- 

 tained at the natural standard. 



EXPERIMENT II. 



The subject of this experiment was a middle- 

 sized dog. The temperature of the room was 

 63 of Fahrenheit's thermometer. By having pre- 

 viously secured the carotid and vertebral arteries, 

 I was enabled to remove the head with little or 

 no hemorrhage. The artificial respirations were 

 made about 24 times in a minute. The heart 

 acted with regularity and strength. 



At the end of 30 minutes from the time of 

 the spinal chord being divided, the heart was 

 felt through the ribs contracting 76 times in a 

 minute. 



At 35 minutes the pulse had risen to 84 in a 

 minute. 



At one hour and 30 minutes the pulse had 

 risen to 88 in a minute. 



At the end of two hours it had fallen to 70, 

 and at the end of two hours and a half to 35 

 in a minute, and the artificial respiration was 

 no longer continued. 



