XXX11 COMPARATIVE ELECTRO-PHYSIOLOGY 



FIG. PAGE 



93. Photographic Record showing the nearly complete Abolition of 



Response by strong KOH ';':" 135 



94. Photographic Record showing the Stimulatory Action of Solution of 



Sugar . . . 136 



95. Photographic Record showing Continuous Action of 2 per cent. 



Na^COg Solution . . , . . ..... . . 136 



96. Photographic Record showing the Depressing Action of 5 per cent. 



HClAcid . . . . .138 



97. Photographic Record showing Effect of I per cent. KHO . . . 138 



98. Photographic Record of Effect of 5 per cent. KHO . . . . . 139 



99. Striking-rods for stimulation of two ends of specimen and inducing 



phase-difference .......... 143 



100. Isolated and diphasic responses with increasing difference of phase . 144 



101. Photographic Record showing Negative, Diphasic, and Positive 



Resultant Responses in Tin ....... 146 



1 02. Photographic Records of Response of Bryophyllum . . . . 147 



103. Photographic Record of Response of Petiole of Cauliflower by the 



Diametric Method . . . . . . . . .147 



104. Distribution of Electrical Tension in Muscle-cylinder . . . . 150 



105. Photographic Record showing Persistent Electrical After-Effect in 



Inorganic Substance under Strong Stimulation . . . 151 



1 06. Photographic Record exhibiting Persistent Galvanometric Negativity 



in Plant Tissue after Strong Stimulation . . . . . 152 



107. Experimental Arrangement for determining Electrical Effect due to 



Section . . . . . . . . . . .154 



1 08. Records showing increasing Persistent Galvanometric Negativity, 



according as injury is caused nearer to proximal contact . . . 154 



109. Curve showing the Electrical Distribution in Stem with one Sectioned 



End 155 



no. Electrical Distribution in Plant-cylinder with Opposite Ends 



Sectioned . . . . . . . . . . . 156 



in. Record of Responses in Plant (Leaf- stalk of Cauliflower) by Method 



of Negative Variation . . . . . . . 1 59 



112. Response by Positive Variation of Resting Current . . . . 165 



1 1 3. Distribution of Electric Potential in Lamina of Colocasia along a radial 



line from dead to living through intermediate stages . . .169 



114. Straight Form Potentiometer . . . . . . . 171 



115. Distribution of Electric Potential in Petiole of Nymphaa alba^ one 



end of which has been killed . . . . . . .172 



1 1 6. Photographic Records of Responses of Vegetable Nerve, one end of 



which has been injured 175 



117. Typical Cases of Variation of Current of Rest and Action-Current. 



Specimen originally isotropic . . . . . . 175 



1 1 8. Typical Cases of Variation of Current of Rest and Action-Current ; 



intermediate point naturally less or more excitable than either of 

 terminal . . . . . . . . . . . 176 



119. Typical Cases of Variation of Current of Rest and Action Current. 



Anisotropic organ, B end originally more excitable than A . 177 



