122 



THE VENOMS OF CERTAIN THANATOPH1DE JE. 



Experiment No. 8. 



Normal 









Length of 



Time: 



Respirations 



' curve 



n'n. sec. 



per 



minute. 



m. m. 







60 



9 



20 





80 





40 





120 



15 



1 00 





100 



45 



1 20 





60 



10 



1 40 





42 



38 



2 00 









Experiment No. 9. 



Time: 

 min. sec. 



Normal 



10 

 20 

 30 

 40 

 00 

 30 

 00 

 10 

 20 



Respirations 

 per minute. 



300 

 300 

 255 

 285 

 240 

 255 

 200 

 150 

 125 



Experiment No. 10. 



Time: 

 min. sec. 



Normal 



20 

 40 

 00 

 30 

 00 

 00 

 00 

 00 



Respirations 



per minute. 



36 



39 

 39 

 51 

 52 

 45 

 48 

 46 

 36 



iDJected intravenously 0.015 gram dried Cobra venom 



dissolved in 1 c. c. distilled water and filtered. 

 Struggles. 



Respiration ceased. 



Length of 



curve 



m. m. 



8 



9 



11 



10 



10 



11 



9 



1 



1 



Injected intravenously 0.015 gram dried Cobra venom 

 dissolved in 1 c. c. distilled water. 



Respiration ceased. 



Injected intravenously 0.^03 gram dried Cobra venom in solution. 



Respiration ceased. 



The Action of Pure Venoms on the Respiration in Animals in which the Pneu- 

 mogastric Nerves were Cut. — "When injections are made, after section of the pneu- 

 mogastric nerves, the primary increase in the respiration rate does not occur, but a 

 diminution begins at once; and, on the whole, drops irregularly until death ensues. 

 Four experiments were thus made : one with Crotalus adamanteus, two with 

 Ancistrodon piscivorus, and one with Cobra venom; the results being on the whole 

 reasonably uniform. 



