XXvi LIST OF ILLUSTRATIONS 



PAGE 



96. Effect of strong light applied below (Averrhoa) . . .168 



97. Effect of strong light on upper side of Mimosa leaflet . .169 



98. Effect of strong light on lower side of leaflet . . .169 



99. Diagrammatic representation of different types of response 



under unilateral stimulation . . . . . -172 



100. Radio thermal Stimulator . . . . • . .176 



loi. Effect of indirect radio thermal stimulation . . . -177 



102. Diphasic response under more effective stimulation . -177 



103. Positive response to stimulation by short exposures to thermal 



radiation . . . • . • • • .178 



104. Response of pulvinus of Mimosa to thermal radiation . .179 



105. Record of positive, neutral, and negative curvature under 



continued unilateral action of thermal radiation (Dregea) . 180 



106. Response of root to unilateral and continuous thermal radia- 



tion (Ipomoea) . . . • . • • .181 



107. Effect of high-frequency alternating electric field on response 



of pulvinus of Mimosa . . . . . • .185 



108. Effect of high-tension alternating field on growth . .186 

 io8a. Revival of growth in Wheat-seedhng, normal record without 



balance . . . . • • • • .187 



109. Effect of strong intensity of field in retarding growth (Wheat) . 188 

 no. Diagrammatic representation of method employed for obtain- 

 ing response to Wireless Stimulation . . . .189 



111. Record of responses to electric wave with the Balanced 



Crescograph . . . • • • • .190 



112. Acceleration of growth by wireless stimulation in a subtonic 



specimen (Wheat) . . . . • • .191 



113. Retardation of rate of growth under strong wireless stimulation 



(Crinum) . . . • • • • • .192 



114. Effect of wireless stimulation on unbalanced growth . .193 



115. The Self-Recording Radiograph . . . . . .199 



116. Radiogram of variation of intensity of Hght from the sky 



during 12 hours in winter ...... 202 



117. Record of diurnal variation of hght and of temperature in 



summer .......•• 203 



118. Leaflets of Cassia alata : open in daytime, and closed in 



evening ....•.••• 207 



119. The Automatic Recorder of diurnal movements of plants . 208 



120. Effect of sudden darkening . . . . • .211 



121. Diurnal movement of the leaflet of Cassia alata . . .212 



122. The day and night positions of the petiole and terminal 



leaflet of Desmodium gyrans . . . . • .213 



123. Record of diurnal movement of the terminal leaflet of 



Desmodium gyrans . . . • • • .214 



^^"^'l Thermonastic responses of petal of Zephyranthes . . . 218 



125- ) 



126. Nymphaea closed in daytime . . . • • .219 



127. Nymphaea open at night .....♦• 219 



128. The Thermonastic Recorder ...... 220 



129. Negative thermonastic response of Nymphaea . . . 221 



130. Diurnal record of Nymphaea . . . . • .222 



