THE ACTION OF VENOMS U P N THE PULSE-RATE. 



83 



Experiment No. 64. 



Time: Pulsations 



min. sec. per minute. 



REMARKS. 



The Actions of Venom Peptones upon the Pulse-rate of Animals after Section 

 of the Pneumorjastric Nerves and Cervical Spinal Cord. Six experiments made 

 on animals in which the heart was cut off from central nervous influence by section 

 of the pneumogastric nerves and section of the spinal cord in the middle cervical 

 region gave uniform results. Three were made with peptone from the venom 

 of the Crotalus adamantew; two with the peptone from the Ancistrodon piscivorua, 

 and one with that of the Cobra. In all of these experiments there was a diminu- 

 tion of the pulse-rate, and usually this was well marked. These results are also 

 in accord with what was found in experiments with pure venom. 



Experiment No. 66. 



Normal 



REMARKS. 



Pneumogastric nerves and cord cut. Injected intravenously 

 the peptone from 0.015 gram dried venom of the Crotalus 

 adamanteus. 



