INFLUENCE OF THE BRAIN ON tHE ACTION OT THE HEAHT. oc j 



Exp. 2. I repeated the experiment on a middle sized dog. gxp.s. Oa* 

 The temperature of the room was 63« of Fahrenheit's ther- dog. 

 mometer. By haying previously secured the carotid and 

 vertebral arteries, I was enabled to remove the head with 

 little or no haemorrhage. Tlie artificial respirations were 

 made about twenty-four times in a minute. The heart acted 

 with regularity and strength. 



At the end of 30 minutes from the time of the «?»«»' Action of tli« 

 marrow being divided, the heart was felt through the ribs heart, 

 contracting 76 timas 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 ia 

 a minute. 



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

 end of two hours and a hal/ to 35 in a minute, and the 

 artificial respiration was no longer continued. 



By means of a small thermometer with an exposed b"'^? Auimallifi»t. 

 I measured the animal heat at different periods. 



At the end of an hour the thermometer in the rectum had 

 fallen from 100^ to 94*'. 



At the end of two hours a small opening being made ia 

 the parietes of the thorax, and the ball of the thermo- 

 meter placed in contact with the heart, the mercury fell 

 to 86°, and half an hour afterward in the same situation it 

 fell to 78«. 



In the beginning of the experiment I made an openinff , 

 into the abdomen; and, having passed a ligature round each secreted, 

 ureter about two inches below the kidney, brought the 

 edges of the wound in the abdomen together by means of 

 sutures. At the end of the experiment no urine was col- 

 lected in the ureters above the ligatures. 



On examining the blood in the different vessels, itwasgiooj^ 

 found of a florid red colour in the arteries, and of a dark 

 colour ii) the veins, as under ordinary circumstances. 



During the first hour and a half of the experiment there ^viuscular coa^ 

 were constant and powerful contractions of the muscles of tractions, 

 the trunk and extremities, so that the body of the animal 

 was moved in a very remarkable manner, on the table, on 

 w^hich it lay, and twice there was a copious evacuation 

 of faeces. 



Exfi 



