POISON OF SOME INDIAN VENOMOUS SNAKES. 63 



left hind leg is drawn up, and the two fore legs are held over 

 head with palms turned forwards. 



12.20. Cornea sensible. Left leg is drawn up again if it be 

 forcibly extended. 



12.31. Cornea sensible. When the left hind foot is pressed it 

 is drawn up very slowly with a wriggling motion. Pressure on 

 the right foot causes no movement whatever. 



12.40. Acetic acid applied to a forearm causes vigorous 

 movement in it and also in left hind leg. 



1. Acetic acid to right hind foot causes no movement. 

 Applied to left hind foot it causes vigorous movements in both 

 forearms and left hind leg. 



1.12. A ligature was applied to the left thigh in a similar 

 manner to that on the right, so as to cut off the circulation in 

 the left leg also, and thus bring the two legs as much as possible 

 under the same conditions. The general condition of the frog is 

 much the same as before ; but the reflex action produced by 

 irritation of the cornea is slighter. 



1.24. Acetic acid applied to right forearm. Slight movement 

 occurs in right hind leg alone. When applied to left forearm it 

 caused slight movement in that arm alone. 



1.35. Acetic acid applied to both feet, both forearms, and to 

 the nose caused no motion anywhere. Both sciatic nerves were 

 now laid bare along a considerable portion of their course. It 

 was found that, although the right sciatic had not been included 

 in the ligature, it had been tightly constricted by the fascia at 

 the place of ligature. Sciatic nerves irritated by an induced 

 current. 



Distance of 

 secondary from 

 Leg. primary coil. 



Left. No contraction of muscles of leg. 



Eight. 32"0 Distinct contraction. As this might 



possibly have been due to the left 

 sciatic being injured by the ligature 

 more than the right, both sciatics were 

 exposed further, and irritated quite 

 below the points of ligature and just 

 above the knee. 



