ILLUSTRATIONS xxxi 



■AGE 



60. Inefi'ectiveness of Stimuli, owing to Increasing Fatigue, in yJ//w(7j-a . 113 



61. Fatigue- Reversal in Arsenic, under Continuous Stimulation of Hertzian 



Radiation . . . . . . . . . . . 119 



62. Automatic Record of Fatigue in the Contractile Response of India- 



rubber under Rapidly Succeeding Thermal Shocks . . .120 



63. Preliminary Staircase Increase, followed by Fatigue, in the Response 



of Ga/f«a to Hertzian Radiation 121 



64. Preliminary Staircase Increase, followed by Fatigue, in the Response 



of Style of ^//c/zar/j- . . . . . . . . .121 



65. Preliminary Staircase, followed by Fatigue, in the Responses of 



Muscle (Brodie) 122 



66. Staircase Increase in Electrical Response of Petiole of BryophylliDit, 



rendered sluggish by cooling 122 



67. Mechanical Response in Tendril of Passiflora in which Growth 



was originally at Standstill 127 



68. Eftect of Carbonic Acid Gas on Longitudinal Contractile Response . 131 



69. Efiect of Hydrogen Gas . . . . , . . ... 132 



70. Photographic Record showing Effect of Carbon Bisulphide in Abolish- 



ing Response . . . . . . . . . .132 



71. Effect of .Vapour of Alcohol ........ 134 



72. Efilect of Ether 135 



73. Efilect of H CI Vapour 136 



74. Action of Chlorine . . . . . . . . . -137 



75. Diminution of Response in Eiicharis Lily by Lowering of Temperature 140 



76. After-effect of Cold on Ivy, Holly, and Eucharis . . . .141 



77. Effect of Cold on Longitudinal Response . . . . . . 143 



78. Effect of Rise of Temperature on Electrical Response . . . 144 



79. Effect of Rise of Temperature on Longitudinal Contractile Response 



of Plant 144 



80. Effect of Rising and Falling Temperature on the Electrical Response 



of Scotch Kale (stimulus constant) 145 



81. Effect of Cyclic Rise and Fall of Temperature on Longitudinal 



Mechanical Response in Plant 146 



82. Determination of Death-point in Allinin Tube by Observation of 



Volumetric Contraction, causing sudden Expulsion of Water . . 157 



83. The Thermometric Spiral and Optic Lever of the Morograph . . 165 



84. The Morograph . . . . . . . . . .167 



85. Thermo-mechanical Curve obtained Photographically (Coronal ]t'\\z.- 



xacnt oi Pass ijlora) . . . . . . . . . . 168 



86. Thermo-mechanical Curve of Two Different Specimens of Style of 



Datura alba, obtained from Flowers of the same Plant . . .169 



87. Thermo-mechanical Records of Young Specimen of Spirogyra ; Older 



Specimen of same ; and Style of Z'a/z/ra a/^a . . . . . 170 



88. Thermo-mechanical Record of Leaf of J//w^^a . . . .172 



89. Diagrammatic Representation of Mono-polar Excitation . . . 193 



90. Bi-polar Excitation of y)/i!V«(7M . . . . . . .194 



91. Bi-polar Excitation of j^/i'/Z/j/z/w ....... 194 



92. Make-kathode and Break -anode Effects in Biophytiiin . . -195 



