xxxiv COMPARATIVE ELECTRO-PHYSIOLOGY 



FIG. PAGE 



146. Crescographic Record of Multiple Growth-responses in Peduncle of 



. Crocus . . .. .- . " . , :">'':-. . -; . . . 221 



147. Natural and Responsive Currents in Leaves . - v' . . . .224 



148. . Burdon Sanderson's Fundamental Experiment on Dioncea Leaf . 229 



149. . Parallel Experiment in Sheathing Petiole of Musa . . . . 229 



150. . Positive Response of certain Leaves of Dioncea ' ,". -. ""-o . 230 



151. Diphasic Response of Leaf of Dionaa ( in its prime. ' Positive followed 



. by negative .,.,.,.,. .' ^"f v ."', '>" . . 230 



152. Positive Response of same Leaf when 'modified' by previous 



stimulation , . . . . . . . . .. . .-"..* . 230 



153. Experimental Connections with Dioncea according to the second 



Experimental Method of Burdon Sanderson . . '.. "- . . 233 



154. Response . of Under-surface of Leaf of Dioncea, with Electrical 



Connections as in Fig. 153 . . . . . . -233 



155. Photographic Records of Positive, Diphasic, and Negative Responses 



,of Petiole of Musa depending on the Effective Intensity of 

 . Transmitted Stimulus . - . . - . ... . . 238 



156. Electrical Response of Lamina of Nymphcea alba due to Transmitted 



Excitation from Petiole . . : * * -""" '"* ' 246 



157. Diagrammatic Representation by Du Bois-Reymond for Explanation. 



of Electrical Response in Organ 'of Torpedo . ''. Y ./ ! v . . 247 



1 58. Photographic Records of Responses given by Leaf of Coleus aromaticus, 



when both Surfaces are Excited Simultaneously by Thermal 

 Shock . . .-. .248 



159. Experimental Arrangement for Rheotomic Observations . . . 252 



1 60. Records of Two Successive Responses in Leaf of Bryophyllum 



calycinum under Equi-alternating Electrical Shocks . . .253 



161. Response- curve from Rheotomic Observation on Leaf oi Nymphcca 



alba . ,' . . .'";, . . . . . -254 



1 62. Series of Responses given by Leaf of Plerospermum suberifolium to 



Stimulus of Equi-alternating Electrical Shocks . ." . , -" .- 255 



163. Photographic Record of Responses of Carpel of Dillenia indica . 256 



164. Photographic Record of Normal Responses given by Pitcher of 



Nepenthe^ under Equi-alternating Electric Shocks . . . 256 



165. Responsive Currents in Lead Wire . . . . . 264 



166. Flat Strip of Lead, of which lower Surface is Brominated . . 265 



167. Photographic Records of After-effect of Homodromous f and Hetero- 



dromous ^ Induction-shocks in prepared Strip of Lead . . . 266 



1 68. Photographic Record of Responses to Equi-alternating Electric 



Shocks in Prepared Lead Strip . -. . .-.'>. ' 267 



169. Response of Pulvinus of Mimosa to Equi-alternating Electric 



. Shocks ....... 268 



170. , Experimental Arrangement for Determination of Excitatory After- 



effect of Equi-alternating Electrical Shocks . .... 276 



171. . Method of Direct Effect of Excitation by Equi-alternating Shocks . 280 



172. Excitation by Equi-alternating Shocks . . . ...--. 281 



173. Photographic Record of Response of Petiole of Musa to Equi-alter- 



nating Electric Shocks, before and after Application of Chloroform 284 



