POISON OF SOME INDIAN VENOMOUS SNAKES. 71 



branches of the fifth nerve retained their irritability after the 

 cord had become nearly paralysed ; and, in several experiments, 

 reflex actions could be induced by irritation of the cornea after 

 voluntary motion and respiration had ceased. 



Experiment XLVI. 



The right leg of a frog was ligatured, excluding the sciatic 

 nerve, and a concentrated solution of dried cobra-poison 

 injected into the dorsal lymph-sac at 2.3 p.m. 



2.5. Already affected. Much less active. Lies very quiet. 



2.34. Paralysed. On touching his body he moves the right, 

 but not the left leg. 



When acetic acid is applied to the hand, he straightens both 

 the arms and contracts the right, but not the left leg. 



Acetic acid applied to left hind leg causes him to straighten 

 both arms and draw up the right leg ; but there is only feeble 

 movement in the left leg. 



When acetic acid is applied to the right foot, the foot itself is 

 drawn up ; but there are no movements of any other part of the 

 body. 



When acetic acid is applied to left hand, the left arm is 

 powerfully straightened, and there are strong contractions of 

 right hind leg, but none in the left, and little movement in any 

 other part of the body. 



Acetic acid applied to left foot causes powerful extension of 

 both legs. 



Acetic acid applied to the right foot has no effect. Electrodes 

 were inserted in the spine and the cord irritated by a Earadic 

 current. Distance of the secondary from the primary coil 

 18 cm. There was movement of left hand. 



At 16 cm. movement of left hand and right leg. 



At 12 cm. also faint movement of left leg. 



At 15 cm. the interrupted current was kept up for some time, 

 and the muscular twitchings were more powerful in the left 

 gastrocnemius than in the right one. 



On applying the electrodes to the lumbar nerves, coil at 

 48 c, the right leg contracts. 



Coil at 42 cm. the left leg only twitches. 



