INDEX 439 



Cucurbita, eifect of ether vapour on growth of, 44 ; of drought and 

 irrigation on growth of, 51 ; latent period of responsive variation 

 of growth to stimulus of light, 73 



Cucurbita tendril : tactile pits in, 90 ; effect of indirect stimulation in 

 accelerating growth of, 91 ; after-effect of stimulation on growth of, 

 92 ; twining of, under unilateral stimulus of contact, 94 



Daffodil, variation of growth under ether, 44 



Dahlia, diurnal movement of dia-geotropic leaf, 237, 238 ; diurnal record 



of leaf, 240 

 Datura, variation of growth under : ether vapour, 44 ; chloroform, 46 

 Death-spasm, at fatal temperature, 37, 390 ; under chloroform, 46, 47 ; 



test of, 47 

 Desmodium gyrans, terminal leaflet of : effect of angle of inclination of 



incident light on tropic curvature of, 113 ; complete phototropic curve 



of, 153 ; diurnal movement of, 213-15, 430 ; effect of chloroform on 



geotropic response of, 297 

 Dia-phototropism, 133, 134, 427 

 Dia-radiothermotropism, 1 79 



Differential excitability, effect of, on the direction of torsion, 255 

 Diurnal Indicator, 233 

 Diurnal movement of Mimosa leaf : four phases of, 267 ; spasmodic fall 



in the evening, 271, 431 ; variation of geotropic torsion of, 273 ; 



characteristic after-effect of light on, at pre-maximum, maximum, 



and post-maximum, 277, 278, 431 

 Diurnal movement, thermo-geotropic : of procumbent stem of Mimosa, 



237 ; of Tropaeolum and of Dahlia, 238 ; of dia-geotropic leaves, 



240 ; effect of constant temperature on, 239, 240 ; effect of reversal 



of geotropic anisotropy on, 244 ; effect of abolition of transpiration 



on, 247, 248 ; analogy with thermonasty, 246, 249. See also ' Praying ' 



Palm 

 Diurnal movement, thermonastic : positive and negative types of, 217, 



223 ; of Zephyranthes, 217, 223 ; of Nymphaea, 221, 222, 223 ; of 



Sijbaria Palm, 231 

 Diurnal movement, under recurrent light and darkness : of leaflet of 



Cassia, 212, 430 ; of terminal leaflet of Desmodium, 213, 430 

 Diurnal movements of plants, phenomena of, 195, 429 

 Diurnal Recorder, 208, 209, 227 

 Diurnal variation : of tension and bulk, 241 ; of tissue-tension in Mimosa, 



242 

 Dorsiventral organ : geotropic response of Mimosa in normal and in 



inverted position, 290 

 Dregea volubilis : positive radio-thermotropic curvature of stem of, 178 ; 



neutralisation of curvature and negative response under prolonged 



exposure, 180 



EcLiPTA, enhanced geotropic curvature of, under chloroform, 296 

 Electric Probe, 328 ; localisation of geo-perceptive layer by, 335 

 Electric spark, effect of light from, on growth, 107 



