438 INDEX 



BioPHVTUM SENSITJVUM, anomalous response of leaflet of, to light, 102 

 Bryophyllum calycinum : positive, diphasic, and negative electric re- 

 sponse of, under indirect stimulation of increasing intensity, 129 ; 

 electric after-effect of light on, 260 ; geo-electric response of, 340 ; 

 localisation of geo-perceptive layer in, 341 



Calendula, duplication of geo-perceptive layer and starch-sheath in, 345 



Carbon dioxide, effect of : on balanced growth, 32 ; on growth, 44, 293, 



422 ; on geotropic response of growing and of pulvinated organs, 299, 



303 

 Cassia alata, diurnal movement : of leaflet, 210, 215, 430 ; of petiole, 279 



Cassia alata, response of : to alternate light and darkness, 212 ; post- 

 maximum after-effect of light on, 264 ; diurnal record of, 279 



Centaurea, effect of ether vapour and chloroform on growth of, 44, 46, 

 47 ; geo-electric response of, 343 



Chemical agents, effect of, on growth, 43 



Chloroform, variation of growth under, 46, 293, 422 ; revival of growth 

 by, 46 ; arrest of growth and death-spasm under continued applica- 

 tion of, 46, 293 ; effect of, on geotropic response, 296 ; effect of, on 

 autonomous torsion, 393, 434 



Circumnutation, autonomous torsional, 377, 381 ; determination of rate 



of, 377 

 Clitoria Ternatea, variation of autonomous torsion of stem of : under uni- 

 lateral light, 409, 410, 411 ; under unilateral geotropic stimulation, 



415. 

 Clitoria Ternatea, positive phototropic curvature of leaflet of, 104 



Coal-gas, effect of, on photo-geotropic balance, 310 



Collimator, 112 



Commelina bengalensis, localisation of geo-perceptive layer in, 343 ; 



critical angle for geotropic excitation of, 362 

 Contact-stimulus, effect of, on tendril, '94 ; on twining stem, 381-2 

 Convolvulus, geo-electric response of, 344 



Copper sulphate, effect of small and large doses of, on growth, 49 

 Cosmos, effect of prolonged indirect stimulation on growth of, 128 

 Crescograph, High Magnification, 6, 420 ; Magnetic, 19, 421 

 Crescograph, Balanced Method of : by Falling Weight, 23 ; by Inclined 



Plane, 27 

 Crinum Lily, contractile response of, under electric stimulation : latent 



period and time relations of, 65 ; continuity between incipient and 



actual contraction in, 67 

 Crinum Lily, growth of : effect of COg on, 44 ; of ether vapour on, 45 ; 



of chloroform on, 46 ; of external tension on, 60 ; of increasing 



intensity of light on, 73 ; of longitudinally transmitted impulse on, 



126 ; of direct and indirect stimulation on, 127 ; responsive variation 



in, under high-frequency alternating current, 192 

 Crinum Lily, phototropic curvature of : under increasing intensity of 



light. III ; under increasing duration of exposure, 112 ; under 



different angles of incidence of light, 113 ; algebraical summation of 



geotropic and phototropic curvature of, 288 

 Crocus vernus, thermonastic response of, 217 

 Croton, diurnal record of leaf of, 240 



