442 INDEX 



Ipomoea reptans, response of root : negative phototropic curvature under 

 stimulation of root-tip, 141 ; effect of simultaneous photic stimulation 

 of root-tip and growing region, 143 ; positive, dia-, and negative 

 phototropism of, 144 ; positive, dia-, and negative radio-thermo- 

 tropism of, 181 



Irrigation: revival of growth, under, 51 ; effect of, with cold and warm 

 water, 52, 54 



JosT, quoted, 98, 133, 139 



Kentia, diurnal movement of, 232 



Kraus, on diurnal variation of tension and bulk of organs, 241 

 Kysoor (Scirpus Kysoor), growth of : rate of, 12, 13 ; determination of 

 absolute rate, 14 ; optimum and minimum temperature for, 36, 37 ; 

 Thermocrescent Curve of, 39 ; effect of irrigation with cold and 

 warm water on, 53 ; retardation of, under light, 72 ; acceleration of, 

 under subminimal photic stimulation, 83 ; acceleration under light 

 in subtonic specimen, 86 



Latent period of phototropic response, 106 ; of geotropic response, 284-6 



Latent period of responsive variation of growth : under electric stimula- 

 tion, 64 ; under photic stimulation, 73 ; effect of intensity of stimula- 

 tion on, 65 



Laws of Direct and Indirect Stimulation, 131 



Laws of Torsional Response of anisotropic organs : pulvinated organ, 

 256, 411 ; twisting stem, 411 



Light and temperature, diurnal variation of, 202-5 



Light on growth : retarding effect of, 72 ; latent period of response to, 

 73 ; effect of increasing intensity of, 74 ; direct and after-effect of, 75, 

 259, 260-5, 275, 277 ; effect of different colours of, 78 ; accelerating 

 effect of subminimal stimulation by, 82 ; accelerating effect of, on 

 subtonic plants, 86 ; effect of a single spark of, 107 



Light, relation between quantity of, and tropic curvature, 109, 114; 

 effect of, on autonomous torsion, 401, 402, 409, 418 



Light, tropic curvature under: effect of angle of inclination on, 113, 114; 

 of increasing intensity and duration of exposure on, 109, iii, 114 



Magnetic Crescograph, 19, 421 



Mechanical stimulation : effect of friction on growth, 87, 93, 423 ; effect 

 of wound 89 ; effect of, on autonomous torsion, 400 



Mechanotropism of tendril, 90, 426 ; effect of direct and indirect unilateral 

 mechanical stimulation on, 94 ; electric response of proximal and 

 distal sides, 95 ; response of less excitable side, 97 ; inhibitory action 

 of stimulus on, 98 



Millardet, on periodic variation of tension in Mimosa, 242 



Mimosa pudica, responsive movement on accession and withdrawal of 

 water, 56 ; dual impulses, positive and negative, generated under 

 stimulation, 117 ; velocity of impulse, 120 ; effect of longitudinal 

 transmission of impulse, 119 ; effect of transverse transmission of im- 

 pulse under photic, radio-thermal, and electric stimulation, 121, 122, 



