116 



THE VENOMS OF CERTAIN THAN ATOP II 



REMARKS. 



Twitchings. 



Killed. No ecdiymoses. 



REMARKS. 



Injected intravenously the peptone from 0.006 gram dried 

 Cobra venom. 



Dead. Asphyxiated; no ecchymoses ; blood clots in canula. 



The Action of Venom Ptplones en tJie Blood Pressure of Animals in which the 

 Pneumofjastric, Depressor, and Sympathetic Nerves and Cervical Spinal Cord were 

 Cut. In five experiments on animals in which the nerves in the neck and the 

 spinal cord in the middle or upper cervical region were cut we found that but little 

 alteration occurred in the blood pressure until late in the poisoning, excepting in 

 one experiment with the Ancistrodon piscivorw, in which the pressure sunk imme- 

 diately and death occurred in thirty seconds. Two experiments were made with 

 the peptone of the Crotalus adamantens ; one with the Ancistrodon piscivorus, and 

 two with the Cobra. In all of these experiments, excepting one with Cobra, there 

 was an immediate comparatively slight fall of pressure after injection, which was 

 followed generally by a rise; in the excepted case of the Cobra there was a primary 

 rise equal to 3 m. m. of mercury, which was followed by a fall, and this in turn 

 by a rise. The pressure, as in the previous experiments, usually declines towards 

 death. 



REMARKS. 



Injected intravenously the peptone from 0.015 gram dried 

 venom of the Crotalus adamanleus. 



