370 RESEARCHES ON IRRITABILITY OF PLANTS 



Biophytum sensiiivum, effect of increasing intensity of stimulus on, 284 

 latent period of, 281 



multiple response in, under chemical stimulus, 287 

 „ „ ,, ,, constant current, 249 



,, ,, ,, ,, electrical stimulus, 285 



„ „ light, 286 

 ,, ,, ,, ,, thermal stimulus, 286 



polar effects of current in, 221, 239, 261 

 positive response of, 180 

 response on ' all-or-none ' principle, 282 

 velocity of transmission in, 151 

 Bi-polar method, 113 



Carbon disulphide, effect of, on Desmodium pulsation, 338 



,, ,, ,, ,, ,, Mimosa response, 92 



Carbonic acid, effect of, on pulsation of Desmodium, 335 



„ „ „ ,, ,, response in Mimosa, 91 



Cardiac pulsation, similarity between Desmodium pulsation and, 321, 323, 



339 

 Chemical agents, effect of, on rhythmic response, 332 



„ ,, ,, ,, ,, mechanical response of Mimosa, 85 



Chloroform, effect of, on Desmodium pulsation, 336 



,, ,, ,, response of Mimosa, 93 



Coal gas, effect of, on Mimosa response, 92 

 Coercer, 15 



Cold, arrest of Desmodium pulsation by, 326 

 ,, diminished velocity of transmission by, 162 

 ,, excitatory action by sudden application of, 100 

 „ paralysis of conductivity by, 163 

 „ prolongation of latent period by, 130 

 ,, unmasking of positive impulse by, 195 

 Condenser discharge, stimulation by, 27 

 Conduction of excitation, channels of, 133 



„ „ determination of velocity of, 136 



,, ,, effect of fatigue on. velocity of, 147 



,, ,, ,, ,, intensity of stimulus on velocity of, 142 



„ ,, ,, ,, optimum condition on velocity of, 145 



„ ,, ,, ,, temperature on velocity of, 148 



„ ,, ,, ,, preferential direction of, 151 



,, velocity of, in Averrhoa, 151 

 „ „ „ Biophytum, 151 



,, ,, ,, Mimosa, 141 



Constant current, polar effect of, 198 

 Contact, electrolytic, 68 



Darkness, effect of sudden, on response of Mimosa, 87 

 Death-point, determination of, by electrical response, 98, 105 



„ ,, ,, ,, thermomechanical inversion, 104 



,, „ >, of bean plant, 104 



,, ,, )f ,, Desmodium, 104 



,, ,, ,, „ Mimosa, 102 



