POISON OF SOME INDIAN VENOMOUS SNAKES. 73 



think, to be attributed to paralysis of its function as an 

 originator, and not as a conductor, of motor impressions. 



Experiment XLVII. 



May 19th. — The kmibar nerves of a frog were exposed and 

 a ligature tied round the body, excluding these nerves. 



12 (noon). Some dried cobra-poison dissolved in water wa& 

 injected into the dorsal lymph-sac. 



1.45. The frog is partially paralysed ; mouth gaping; reflex 

 action is still marked in all the limbs, but more in the legs 

 than in the arms. 



The heart was exposed when the ligature was applied ; it still 

 beats, but feebly and slowly. 



1.50. Acetic acid causes reflex movements when applied to 

 either the hind or fore feet. 



1.54. Applied to the nose, acetic acid causes movements in 

 all the extremities, and especially in the arms. 



1.56. Applied to the right hind foot it causes movements of 

 the arms and of the jaw, which otherwise gapes. 



2.2. Applied to the left hind foot it causes no reflex action. 



2.14. Heart beating very feebly, 18 pulsations per minute, 

 Keflex movements still occur in all the limbs, and rather more 

 in the legs than in the arms. 



2.30. Acetic acid produces no reflex action anywhere. The 

 heart has almost ceased to beat, and only contracts faintly at 

 long intervals. 



2.34. All reflex action has ceased. 



2.45. Electrodes placed in the spine and the cord irritated by 

 a Faradic current. At 15*5 cm. distance, faint contractions in 

 both arms. At cm. distance, no contraction in legs. Sciatic 

 nerves exposed and irritated. 32*5, slight contraction in left 

 leg ; slight contraction in right leg. 



2.48. Heart is still acting feebly and slowly ; brachial nerves 

 exposed and irritated. 



At 46*5 cm., contractions in both arms. 



2.49. The heart has now ceased to beat, except a faint 

 pulsation in the auricles. 



