ILLUSTRATIONS xiU 



FIGURE. PAGE. 



192, Diurnal movement of the leaflet of Cassia alata . 540 



19.3. The day and night position of the petiole nud 



terminal leaflet of Desmodium gyrans . . . '141 



194. Diurnal record of the terndnal leaflet of Desmodium 



gyrans . . . . . . . 542 



195. Photograph of closed flower of Nymphcra during day OfiO 



196. Photograph of open flower of Nymphcea at night . 550 



197. Action of light on the petal of Nymphcea . . . 551 



198. Diurnal movement of tlie petal of Nymph(va . 552 



199. Diurnal record of the Sijbaria Palm . . . 556 



200. Diurnal record of inclined Palm, geotropicaliy 



curved procumbent stem of Trvpo'ohim, and dia- 

 geotropic leaf of Palm ...... 557 



201. Diurnal record of leaves of Dahlia, Papya, and 



Croton 558 



202. Duirnal record of procumbent stem of Tropreolnin, 



and leaf of Dahlia for two successive days . 560 



203. Abolition of the diurnal movement under constant 



temperature {Tropcvolnm) ..... 565 



204. Efl^ect of inversion of plant on diurnal movement 



of Tropceolum ........ 567 



205. Electric response of the leaf stalk of Bryophyllum 



under light . . . . . . . . 57.1 



206. Diagrammatic representation of electric after-effect 



of photic stimulation ...... 571 



207. After-effect of pre-maximum photic stimuiaiiim . 574 



208. After-effect of maximum photic stimulation . . 574 



209. After-effect of post-maxinnim photic stimulation . 574 



210. Diurnal record of Mimosa in summer and winter . 577 



211. Record of diurnal variatioii of torsion in Mimosa 



leaf 582 



212. Continuous record of automatic pulsation of Mimosa 



leaf 585 



213. Photometric record showing variation of intensity of 



light from morning to evening .... 586 



214. Record of loaf of Mimosa after amputation of sub- 



petioles 589 



