THE ACTION OF VENOMS UPON THE PULSE-KATE. 



63 



Experiment No. 18. 



Time : Pulsations 



mm. sec. 



Normal 



10 

 20 

 SO 

 40 

 00 

 30 

 00 

 10 

 20 

 50 

 30 

 20 



Time: 

 min. se 



Normal 



10 

 15 

 20 

 30 

 40 

 00 



pel' minute. 



310 

 310 

 320 

 310 

 260 

 310 

 330 

 340 

 340 

 150 

 150 

 165 



Experiment No. 19. 



Injected intravenously 0.015 gram dried Cobra venom dis- 

 solved in 1 c. c. distilled water. 



Dead. 



Pulsations 

 per minute. 



290 

 290 

 280 

 280 

 280 



Injected intravenously 0.00ft gram dried venom of the Daboia 

 Russellii dissolved in 0.5 c. c. distilled water. 



Tetanic convulsions. 

 Dead. 



Experiment No. 20. 



Normai 



Time: 

 ain. see. 





 13 

 20 

 40 

 00 

 30 

 00 

 00 



1 

 1 

 2 



4 



9 00 

 12 00 

 14 00 

 20 



Pulsations, 

 per minute. 



216 



252 

 252 

 264 

 288 

 260 

 264 

 231 

 108 



Injected intravenously 0.003 gram dried venom of the Cobra 

 dissolved in 1 c. c. distilled water. 



48 Respiration ceased; artificial respiration used. 

 126 



Actions of Pure Venoms on the Pulse-rate in Animals toitli Cut Pneumogastric 

 Nerves. — After section of the pneumogastric nerves we invariably found an increase 

 which was, as a rule, very slight. Seven experiments in all were made on animals 

 thus operated upon: one with the venom of the Crotalns adamant-ens ; one with 

 the Crotalns Jiorridus ; one with the Ancistrodon p>iscivorus ; one with the Ancis- 

 trodon contortrix, and three with the Cobra. 



