1874.] Poison of Indian Venomous Snakes. 109 



hind foot there is no movement whatever. On placing acetic acid on 

 either forearm the frog kicks out strongly with the right hind leg. 



2. Interrupted current, distance 7. Acetic acid applied all over the 

 frog no longer causes any movement whatever. Electrodes placed in 

 spinal cord just below occiput. Cord irritated by an interrupted current. 

 Bight leg kicks vigorously. No motion in any other part of the body. 



Experiment LII. 



May ~L5th. Frog ligatured round the middle, the lumbar nerves ex- 

 cepted. A moderate amount of bleeding. 



12.40. Ligature applied. 



12.52. Frog springs actively about when touched. A considerable dose 

 of dried cobra-poison dissolved in water injected into the dorsal lymph-sac. 



1.15. Cornea insensible. When either hind foot is pinched, it is drawn 

 up with a wriggling motion when the frog is lying on the table. When 

 the frog is suspended the foot is drawn up at once. 



1.20. On applying acetic acid to both fore limbs and nose, the hind 

 legs were vigorously drawn up to the body, but only after a long interval. 



1.26. Strong acetic acid applied to both fore limbs and nose. Move- 

 ments in all four limbs after 8 seconds. 



1.36. Weaker acid applied to both fore limbs. Movements in all the 

 limbs in 37 seconds. 



2.20. Applied to both fore legs. Movements in both fore limbs in 4 

 seconds. Worse in hind legs. 



2.53. Applied to all the limbs and the nose. No motion anywhere. 

 Divided medulla. 



2.58. No reflex at all in 200 seconds after application of acid to all 

 the limbs and the body. 



Abdomen opened. Lumbar nerves irritated just below exit from spine. 



Distance of primary from 

 Leg. secondary coil in centime. 



6-3 Left gastrocnemius contracts very 



slightly ; right not. 



Left gastrocnemius contracts slightly; 



right not. Both sciatics exposed and 

 irritated in the thigh some distance 

 below ligature. 



Left 57 Tetanus of leg. 



Bight 58 Tetanus. Nerve rather more firmly 



applied to electrodes. Viscera re- 

 moved and brachial nerves irritated. 

 Bight 47 Contraction of foot. 



Left 45 Contraction of foot. 



In this experiment the loss of reflex motion was gradual. It is shown 

 to be due to paralysis of the cord, and not to excitation of Setschenow's 



