372 RESEARCHES ON IRRITABILITY OF PLANTS 



Dual impulses in Mimosa, 185 

 Duplex recorder, 69 



Electric current, polar effects of, in excitation, 198 



,, ,, multiple excitation induced in Biophytum by, 249 



„ response, detection of excitation by, 98 

 ,, ,, ,, ,, excitatory wave by, 133 



,, ,, determination of death-point by, 105 



,, ,, multiple, 283 



Electro-thermic stimulator, 25 



Electro-tonic block, arrest of excitatory impulse by, 164, 238 

 Electrotonus, modification of excitability by, 164 

 Energy, effect of run-down of, on rhythmic pulsation, 313 



,, storage of, from external stimulus, 287 

 Ether, effect of, on Desmodium pulsation, 336 



,, ,, „ Mimosa, 92 



Excitability, diurnal variation of, 46 



,, effect of temperature on, 60 



,, electro-tonic variation of, 238 



,, variation of, by chemical agents, 85 



Excitatory impulse, arrest of, by action of poison, 167 

 „ „ „ ,, cold, 161 



,, ,, ,, ,, electrotonic block, 164 



,, ,, determination of velocity of, 135 



,, ,, effect of fatigue on, 147 



,, ,, ,, ,, intensity of stimulation, 142 



,, ,, ,, ,, temperature, 148 



,, ,, versus hydro-mechanical, 155 



Exciter, automatic, 66 



Fatigue, alternating, 80 



,, effect of, on death point, 106 



„ ,, ,, ,, latent period, 128 



,, ,, ,, ,, response of Mimosa, 72 



„ ,, ,, ,, velocity of transmission of excitation, 147 



,, reversal, under continuous stimulation in plant and animal, 81 



Friction, errors in record introduced by, 9 



Haberlandt on theory of mechanical transmission, 155 



Hydro-mechanical theory, 154 



Hydrostatic pressure, effect on Desmodium pulsation, 300 



Intermittent contact, advantage of, in record, 21 

 Inversion, thermo-mechanical, 104 



Kathode, depression of excitability at break of, 242 

 ,, diastolic expansion by break of, 237 

 ,, excitatory effect of, at make, 201 



,, reduction of diastolic expansion in Desmodium by make of, 236 

 ,, systolic arrest by make of, 237 



