ILLUSTRATIONS 



XXI 



77. Constancy of latent period under stimuli above the maximal . 



78, 79. Effect of fatigue ........ 



80, 81. Effect of temperature ....... 



82. Determination of velocity of transmission of excitation in 



Mimosa ......... 



83, 84. Determination of velocity by Differential Method . 139, 



85. Effect of intensity of stimulus on velocity and after-effect 



86. Effect of optimum condition on velocity .... 



87. Effect of fatigue on velocity of transmission . . 



88. Effect of temperature on velocity ..... 



89. Record giving transmission time in Biophytum . . 



90. Effect of cold in the retardation and arrest of transmission . 



91. Arrangement for electrotonic block ..... 



92. Record of effect of electrotonic block ..... 



93. Records of transmitted excitation with the block off and on . 



94. Effect of CUSO4 in abolishing conduction .... 



95. Abolition of conductivity by KCN . .... 



96. Positive response followed by negative in Biophytum under 



indirect thermal stimulus ...... 



97. Diphasic response in Biophytum under indirect chemical 



stimulation . . . . . . . 



98. 99. Positive followed by negative in ^z/eyMoa .... 

 100. Diphasic response in Mimosa due to indirect electric stimu- 

 lation of petiole ........ 



loi. Diphasic response in Mimosa due to indirect thermal stimu- 

 lation of stem ........ 



102. Effect of intensity of stimulus in modifying the diphasic response 



103. Effect of diminishing distance in transforming positive into 



diphasic response in Biophytum .... 



104. Effect of diminishing distance on the response in Mimosa 



105. Masking of the positive by the predominant negative 



106. Pohl's commutator ....... 



107. Record of polar excitation under feeble current 



108. Excitation by ascending and descending current . 



109. Records of responses to ascending and descending current 



in Mimosa ........ 



no. Records of responses to ascending and descending induction- 

 shock ........ 



111. The Potential Slide 



112. The Potential Keyboard ...... 



113. The electrode holder . ...... 



114. Excitation induced in Biophytum by the make of kathode and 



break of anode ....,,.. 



127 

 128 

 130 



137 

 140 



143 

 145 

 147 

 149 



151 



162 



165 

 166 

 167 

 172 

 173 



180 



182 



184 



186 

 187 



189 

 194 

 194 

 200 

 202 

 204 



205 



206 

 208 

 210 



217 



224 



