List OF Illustrations 



XXVll 



FIG. 



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 132. 



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^55- 

 136. 



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13S. 



139. 



140. 

 141, 

 142. 



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147. 

 14S. 

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 150. 



I5I. 



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The ' Praying ' Palm : the morning position 

 The ' Praying ' Palm : the afternoon position 

 Automatic Recorder of movements of trees and plants . 

 Record of diurnal movement of the ' Praying ' Palm (Phoenix 

 sylvestris) ......... 



Record of the Sijbaria Palm from noon for 24 hours 



The Diurnal Indicator ....... 



Diurnal curve of movement of procumbent young stem of 

 ^Mimosa pudica ........ 



Diurnal cur\e of the procumbent stem of Tiopaeolum majus, 



and of the leaf of Dahlia, for two successive days 

 Abolition of diurnal movement in Tropaeolum under constant 

 temperature, and its restoration under normal daily 

 variation ......... 



Diurnal record of adult leaves of Dahlia, Papaya, and Croton . 

 Effect of inversion of plant on diurnal movement 

 Record of Kentia Palm before and after abolition of tran- 

 spiration ......... 



Parallel record in a dia-geotropic leaf (Er^-thrina indie a) 

 Diagrammatic representation of the Torsional Recorder 

 Clockwise and anti-clockwise torsional responses of pulvinus 



of Mimosa to stimulation of its right and left flanks 

 Clockwise torsion under stimulation of right flank by thermal 



radiation ......... 



Anti-clockA\-ise torsion under stimulation by thermal radiation 



applied to left flank of pulvinus (Mimosa) 

 Electric response of the petiole of Br\-ophyllum under con- 

 tinuous photic stimulation ...... 



Semi-diagrammatic representation of electric after-effects due 



to photic stimulation ....... 



After-effect of pre-maximum stimulation of terminal leaffet of 



Desmodium g\Tans ....... 



After-effect of stimulation at maximum of terminal leaflet of 



Desmodium gyrans ....... 



After-effect of post-maximum stimulation of terminal leaflet of 



Desmodium g}-rans 



light 



on response of leaf of 



Post-maximum after effect of 



Diurnal record of ^Mimosa leaf in summer and in winter 

 Record of automatic pulsation of ^limosa leaf in the forenoon 

 Photometric record sho\\-ing the variation of intensity of 



hght from morning to evening 

 Record of leaf of Mimosa after removal of sub-petioles 

 Record of diurnal variation of torsion in Mimosa leaf 

 Effect of periodic alternation of darkness and light 

 Pre-maximum after-effect of light on ^limosa 

 ^laximum after-effect of light on Mimosa 

 Post-maximum after-effect of light on ^limosa 

 Diurnal record of Cassia leaf 

 The Quadruplex Geotropic Recorder . 

 Geotropic response of peduncle of Tuberose 



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2S5 



