xxii RESEARCHES ON IRRITABILITY OF PLANTS 



FIGURE. PACE 



115. Record of kathode-make and anode-break in Mimosa . . 230 



116. Effect of anode, opposing systolic contraction in Desmodium . 236 



117. Effect of kathode, opposing diastoHc expansion in Desmodium 236 



118. Alternate effect of anode and kathode .... 237 



119. Arrest at systole by make of kathode, and diastolic expansion 



at break of kathode ....... 237 



120. Arrest at diastole by make of anode, and systolic contraction 



at break of anode ....... 237 



121. Effects of descending and ascending currents at make and 



break on nerve-muscle and petiole-pulvinus . . . 239 



122. Effect of cold on excitability to induction-shock . . . 246 



123. Record showing abolition of polar excitation at high tem- 



perature ......... 247 



124. Multiple excitation in Biophytum under constant current . 249 



125. Record of polar excitation of Type III. .... 255 



126. Polar excitation Type IV. . . . . . . . 256 



127. Transformation of Type II. to Type III. as after-effect of 



previous stimulation ....... 268 



128. Abrupt transition from Type I. to Type III. . . . 271 



129. Polar reactions, Km, Km Am, and Km Am Ab under gradually 



increasing current . . . . . . -273 



130. Record exhibiting modified response Km Kb Am . . . 275 



131. The Oscillating Recorder ....... 279 



132. Record giving latent period of Biophytum .... 281 



133. Record of responses of Biophytum to stimuli -i and i unit . 282 



134. Responses of Biophytum to stimuli .1, .5, i, and 2 units . . 284 



135. Multiple response in Biophytum under strong electric shock 284 



136. Multiple response in Averrhoa under a single strong electric 



shock 285 



137. Multiple response under constant stimulus of light . . . 285 



138. Multiple response under single strong thermal shock . . 286 



139. Multiple response induced by strong chemical stimulation . 287 



140. Leaf of Desmodium gyrans ....... 290 



141. U-tube support and plant-chamber . . . . .292 



142. Continuous record of pulsations of Desmodium leaflet for four 



hours . . . . . . . . . 294 



143. Record of a single pulsation of Desmodium giving time-relations 296 



144. Record of two successive pulsations . . . . ' . 297 



145. Series of automatic pulsations of Desmodium . . . 298 



146. Effect of application of increased internal hydrostatic pressure 



on the pulsation of Desmodium . . . . .301 



147. Effect of increasing load on Desmodium pulsation . . . 302 



148. Effect of ligature in inducing arrest of pulsation of Desmodium 303 



