xxxviii COMPARATIVE ELECTRO-PHYSIOLOGY 



FIG. 1-AGH 



254. Similar effect in response of retina of Ophiocephalus fish . . . 427 



255. The same with another specimen. Light was here cut off after the 



first oscillation 427 



256. Response of retina of Ophiocephahts when slightly fatigued . . 428 



257. Response of frog's eye (Kiihne and Steiner) 428 



258. After-effect of Light on Silver Bromide 429 



259. Response of petiole of cauliflower. Light was here cut off on attain- 



ment of maximum negativity ....... 430 



260. Response of retina of Ophiocephalus fish when depressed . . . 430 



261. Response of isolated retina of fish as observed by Kiihne and Steiner 430 



262. Inclined Slits for Stereoscope and Composite Image formed in the 



Two Eyes 43 2 



263. Composite Indecipherable Word, of which Components are Seen 



Clearly on Shutting the Eyes 432 



264. Diagrammatic Representation of a Multicellular Organ laid Horizon- 



tally and Exposed to Geotropic Stimulus 435 



265. Effect on Apogeotropic Movement of Temporary Application of Cold 



on Upper and Lower Surfaces respectively 436 



266. Diagrammatic Representation of Experiment showing Curvature 



Induced by Unilateral Pressure Exerted by Particles . . . 437 



267. Record of Responsive Curvature Induced in Bud of Crinum Lily by 



Unilateral Pressure of Particles 437 



268. Record of Apogeotropic Response in Scape of Uriclis Lily . . 438 



269. Photographic Record of Geo-electric Response in the Scape of 



Uriclis Lily laid horizontally 440 



270. Experimental Arrangement for Subjecting Organ to Geotropic 



Stimulus, Mechanical Response being Restrained . . .441 



271. Geo-electric Response of the Physically Restrained Scape of Uriclis 



Lily 442 



272. Diagrammatic Representation of Electrical Connections for Deter- 



mination of Velocities of Centrifugal and Centripetal Trans- 

 missions 447 



273. Experimental Arrangement for Comparing the Relative Conduc- 



tivities in Transverse and Longitudinal Directions . . . 454 



274. Response of Frog's Nerve under Simultaneous Excitation of both 



Contacts, by Equi-alternating Electrical Shocks, one Contact 

 being Injured .......... 457 



275. Enhancement of Amplitude of Response, as After-effect of Thermal 



Tetanisation, in P'rog's Nerve ....... 462 



276. Conversion of Abnormal Positive into Normal Negative Response 



after Thermal Tetanisation ........ 463 



277. Gradual Transition from Abnormal Positive, through Diphasic, to 



Normal Negative Responses in Frog's Nerve .... 464 



278. Abnormal Positive Response converted through Diphasic to Normal 



Negative under the increasingly Effective Intensity of Stimulus, 

 brought about by Lessening the Distance between the Responding 

 and Stimulated Points 466 



279. Frond of Fern with Conducting Nerves exposed .... 469 



