XXXII PLANT RESPONSE 



FIG. 1-AGF. 



93. Record of Responses of Leaflet of Biophytum, showing Responses 



occurring at Kathode at Make and not at Break ; and at Anode at 

 Break and not at Make . . . . \ . . . . 196 



94. Effects of Ascending and Descending Currents, on Highly Excitable 



Specimen of Mimosa . . . . . . . . .197 



95. Molecular Model Exhibiting Excitability at the Receptive Area ; 



Conductivity of Intervening Region ; and Mechanical Response 



of Terminal Responder . . . . . . . . . 218 



96. Effect of Ether in the Abolition of Motile Excitability . . . 220 



97. Experimental Demonstration of Effects of Cold and Anesthetics in 



Abolishing Conductivity ......... 222 



98. Diagrammatic Representation of Experiment on Biophytum . . 224 



99. Effect of Anode as Block 233 



100. Experiment showing the Transmission of Excitatory Wave through 



Kathodic Area, and its Stoppage by the Anode .... 233 



10 1. Demonstration of Simultaneous Opposite Effects of Anode and 



Kathode on Transmission of Excitation . . . . . . 234 



102. Diagrammatic Representation of Electrical Connections in Mimosa to 



Exhibit Variation of Motile Excitability, induced by Anode and 

 Kathode . . . 235 



103. ' Developing' Action of Kalhode ....... 236 



104. Diagrammatic Representation of Electrical Connections for Determi- 



nation of Velocities of Centrifugal and Centripetal Transmissions . 242 



105. Curve showing Decline in Heights of Responses, with Diminishing 



Periods of Rest .......... 246 



106. Electrotactile Method for Detection of Excitatory Wave during 



Transit ........... 259 



107. Electrotactile Response in Stem of Mimosa . . ... 260 



108. Experimental Arrangements for Simultaneous Recording of Mechani- 



cal and Electrical Responses ....... 261 



109. Apparatus for Automatic Record ....... 266 



no. Photographic Record of Response of Mimosa, Exhibiting the Latent 



Period in its Variation ......... 268 



Hi. Electric Spark Record, showing Increase of Latent Period by Fatigue, 



in Successive Responses of a Leaf of Mimosa ... . . 269 



112. Response of Biophytum ; Electrical Stimulus having been Applied 



at the Pulvinus of the Motile Leaflet ...... 270 



113. Additive Effects seen in Responses of Biophytum to Stimuli which 



Fall outside the Refractory Period ....... 274 



114. Multiple Electrical Responses due to Single Strong Stimulus . . 280 



115. Multiple Electrotactile Response in Stem of Mimosa, due to Single 



Strong Thermal Stimulus ........ 280 



116. Multiple Mechanical Response of Biophytum, due to a Single 



Thermal Stimulus ......... 283 



1 1 7. Multiple Response in Biophytum ....... 285 



118. Multiple Response in Biophytum . ...... 285 



119. Multiple Response in Biophytum, showing Cyclic Groupings of 



Amplitude and Period 286 



