INDEX 375 



Response, electrical, 98, 177 



„ positive and negative, 177, 181 



„ relation of stimulus to, 62 

 Rhythmic tissue, similarity of response in animal ana plant, 321 



Sensitiveness, comparison between animal and plant, 249 



' Sensitive ' plant, arbitrary distinction between ordinary and, 44 



Staircase response in Mimosa, 77 



Stannius' ligature on cardiac pulsation, 302 



Stimulation, automatic, 66 



„ chemical method of, 23 



,, electrical methods of, 27, 28, 30 



,, thermal method of, 25 



Stimulus, direct effect of, 195 



,, indirect effect of, 196 



„ relation between response and, 61 



,, standardisation of, 48 

 Sugar solution, stimulating action of, on Desmodium pulsation, 333 

 Sulphur dioxide, effect of, on response of Mimosa, 96 

 Sulphuretted hydrogen, toxic action of, 94 



Temperature, arrest of Desmodium pulsation by lowering of, 326 



„ ,, ,, transmission of excitation by lowering of, 161 



,, effect of, on cardiac pulsation, 323 



„ ,, ,, „ Desmodium pulsation, 325 



„ „ ,, „ excitatory efficiency of induction shock, 246 



„ „ ,, ,, ,, „ ,, polar action of 



current, 247 

 „ „ ,, „ latent period, 130 



„ ,, „ „ velocity of transmission of excitation, 148 



„ maximum for Desmodium pulsation, 331 



,, minimum for Desmodium pulsation, 326 



Tetanus, incapability of, in rhythmic tissue, 318 



Thermo-mechanical curve, 104 



Time relation of response of Mimosa, 41 



Tissue modification, effect on polar reaction, 266 



Tonicity, modification of, by stimulus, 79 



Uniform response, in Desmodium, 294 

 „ „ „ Mimosa, 71 



Velocity of excitatory impulse, determination of, by direct method, 135 

 „ ,, ,, „ „ „ differential 



method, 138 

 „ „ „ effect of cold on, 161 



