370 RESEARCHES ON IRRITABILITY OF PLANTS 



Biophytum sensitivum, 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 



,, ,, ,, ,, Desmodium, 104 



,, Mimosa, 102 



