ILLUSTRATIONS XXXV 



FIG. PAGE 



174. Photographic Record of Responses of Plagiotropic Stem of Ciicurbita 



to Equi-alternating Electric Shocks ...... 285 



175. Electrical Responses of Eel to Equi-alternating Electrical Shocks . 285 



176. Rotary Mechanical Stimulator . . . . . . .291 



177. Diagram Representing Different Levels of Excitability, Plus, Zero, 



and Minus . 296 



178. Electrical Response of Grape-skin to Rotary Mechanical Stimulation 299 



179. Electrical Response of Frog's Skin to Rotary Mechanical Stimulation 300 



1 80. Photographic Record of Electrical Responses of Upper Surface of 



Intact Human Forefinger to Rotary Mechanical Stimulation . 301 



181. Photographic Record of Electrical Responses of Grape-skin to 



Thermal Shocks 301 



182. Photographic Record of Electrical Responses of Grape-skin to Stimu- 



lation by Equi-alternating Electrical Shocks .... 302 



183. Photographic Record of Series of Electrical Responses of Frog's Skin 



to Equi-alternating Electrical Shocks . . . . . 302 



1 84. Photographic Record of Transverse Response of Pulvinus of Mimosa 



to Equi-alternating Electrical Shocks ...... 303 



185. Continuous Photographic Record of Autonomous Pulsation of Des- 



modium gyrans from 6 P.M. to 6 A.M. . . . . . . 305 



1 86. Photographic Record of Electrical Responses in Skin of Neck of 



Tortoise to Stimulus of Equi-alternating Electrical Shocks . . 306 



87. Isolated Responses of Upper and Lower Surfaces of Skin of Tomato 



to Rotary Mechanical Stimulus ....... 307 



88. Photographic Record of Series of Responses in Skin of Tomato under 



Equi-alternatin Electrical Shocks ...... 308 



89. A Single Response of Skin of Tomato to Equi-alternating Shock 



recorded on Faster Moving Drum 309 



90. Photographic Record of Series of Normal Responses in Skin of 



Gecko . . . . . . . . . . .310 



91. Photographic Record of Abnormal Diphasic Responses in Skin of 



Gecko, converted to Normal, after Tetanisation . . . . 311 



192. Transverse Section of Tissue of Hollow Peduncle of Uriclis Lily . 313 



193. Photographic Record of Responses of Water-melon to Equi-alter- 



nating Electric Shocks . . . . . . . ..315 



194. Photographic Rec* 1 d of Electrical Responses of Intact Human 



Armpit . . ........ 319 



195. Experimental Arrangement for Response of Human Lip . . . 320 



196. Photographic Record of Electrical Response of Intact Human Lip . 321 



197. Possible Variations of Responsive Current, as between Two Surfaces 



A and B, shown by Means of Diagrammatic Representations of 

 Characteristic Curves . . 324 



198. Photographic Record showing Reversal of Normal Response in 



Pulvinus of Mimosa due to Fatigue ...... 326 



99. Photographic Record showing Reversal of Response in Carpel of 



Dillenia indica, under Sub-minimal Stimulation . . . . 328 



Pitcher of Nepenthe, with lid removed ...... 335 



Glandular Surface of a Portion of the Living Membrane of the Pitcher 



of Nepenthe . . 336 



