ILLUSTRATIONS xxxiii 



FIG. PAGE 



1 20. Multiple Response in Biophytum, showing Cyclic Groupings . . 286 



121. Intermittent Human Pulse (Broadbent) 288 



122. Intermittence in Pulsation of Biophytum . . . . . . 289 



123. Multiple Response of Biophytum under the Continuous Action of 



Light 303 



124. Induction of Autonomous Response in Biophytum, at Moderately 



High Temperature of 35 C 305 



125. Experimental Apparatus for Making Records of Pulsation of Desmo- 



dium ............ 316 



126. Photographic Record of Pulsation of Desmodium . . . .317 



127. Photographic Record of Uniform Pulsations in Desmodium . . . 318 



128. Displacement of Mean Position of Vibration of Desmodium Leaflet 



by Increased Internal Hydrostatic Pressure . . . . . 320 



129. Method of Application of Chemical Agent to Cut End of Petiole . 321 



130. Photographic Record of Effect of Ether Vapour, Large Dose . . 324 



131. Photographic Record of Effect of Alcohol 325 



132. Photographic Record of Effect of Carbonic Acid Gas . . . 325 



133. Photographic Record of Effect of Copper Sulphate Solution Applied 



on the Pulvinus 326 



134. Spark -record of Single Pulsation in Leaflet of Desmodium . . 327 



135. Photographic Records of Autonomous Pulsations in Desmodium, 



showing Increase of Amplitude and Decrease of Frequency, with 

 Lowering of Temperature 332 



136. Effect of Lowering of Temperature in Producing Increase of Ampli- 



tude and Decrease of Frequency in Pulsation of Frog's Heart . 333 



137. Photographic Record of Pulsations of Desmodium during Continuous 



Rise of Temperature 333 



138. Record of Pulsations of Desmodium at Different Temperatures . 334 



139. Record of Pulsations of Frog's Heart at Different Temperatures 



(Pembrey and Phillips) . . . . • . . . . . 334 



140. Effect of Cooling to Thermo-tonic Minimum on Pulsation of Desmo- 



dium 335 



141. Effect of Rapid Cooling by Ice-cold Water 336 



142. Photographic Record of Pulsation of Desmodium, showing Sub- pulses 



during slower Up Movement, as Nodules . . . . . 340 



143. Photographic Record of Cyclic Groupings in Autonomous Pulsations 



of Desmodium, showing Sub-pulses . . . . . . 341 



144. Photographic Record of Autonomous Pulsation of Desmodium, 



showing Hourly Period ., . . . . . . .341 



145. Record showing that Rhythmic Tissue of Desmodium is Incapable of 



being Tetanised 346 



146. Curve showing Relation between Temperature and Period of 



Pulsation in Desmodium ........ 349 



147. Curve showing Relation between Temperature and Period of Pulsa- 



tion in the Heart of a Frog ........ 349 



148. Simple Alternation of Pulsation in Desmodium .... 350 



149. Periodic Groupings of Pulsation in Desmodium . . . . . 350 



1 50. Simple Alternation of Pulsation in Frog's Heart (Pembrey and Phillips) 350 



b 



