1874.] 



Poison of Indian Venomous Snakes. 



Ill 



Experiment LIV. 



May 15th. About 3 P.M. divided the medulla of the frog. 

 16*7*. Suspended the frog by a hook in its jaw. 



Time. 



11.17 



11.44 



11.59 



12.6 



12.10 



12.25 



12.30 



12.40 

 12.48 

 12.55 

 12.58 



1. 



1.2 



1.5 



1.9 



1.16 



1.18 



2.35 



2.45 



Left. Eight. 



12 



12 

 10 



10 



8 



11 

 10 



8 



6 

 5 



7 

 3 



10 



10 

 10 



300 300 



When touched the frog draws up its legs, and 

 makes wiping movements on its flanks. 



The point of an aneurism needle was drawn 

 across the spine so as to destroy any rem- 

 nant of medulla. The frog at once passed 

 into a state of opisthotonos ; but in a few 

 minutes this passed off. 



Injected a drop of concentrated solution of 



dried cobra-poison under skin of back. 

 It draws up legs and wipes back once or twice. 



Another drop. 



No reflex action in either foot. The heart could 

 not be seen beating till the frog was opened ; 

 then it was found beating slowly and lan- 

 guidly, 24 in a minute. 



Half a drop of liquor atropiae placed on heart. 

 Immediately afterwards its pulsations be- 

 came more forcible, but were still 24. 



Experiment LV. 



May 15th. Divided the medulla of a frog about 3 P.M. 

 May Wth. Suspended it by hook through the jaws. 



1.3 6 



1.6 5 



1.11 6 



1.16 6 



1.18 5 



3 

 5 

 6 



12 

 6 



