ILLUSTRATIONS xxxi 



FIG. PAGE 



63. Effect of Over-strain in producing Fatigue 94 



64. Rapid Fatigue under Continuous Stimulation in (a) Muscle ; (b] Leaf- 



stalk of Celery (Electrical Response) 96 



65. Photographic Records of Normal Mechanical Response of Mimosa to 



Single Stimulus (upper figure), and to Continuous Stimulation 

 (lower figure) .....<.... 96 



66. Effect of Continuous Vibration (though 50) in Carrot . . 97 



67. Oscillatory Response of Arsenic acted on Continuously by Hertzian 



Radiation . . 98 



68. Alternate Fatigue (a) in Electrical Responses of Petiole of Cauli- 



flower ; (d) in Multiple Electric Responses of Peduncle of 

 Biophytum ; (c) in Multiple Mechanical Responses of Leaflet of 

 Biophytum ; and (d) in Autonomous Responses of Desmodium . . 98 



69. Photographic Record of Periodic Fatigue in the Automatic Pulsation 



of Desmodium gyrans . . . . . . . . .99 



70. Periodic Fatigue in Pulsation of Frog's Heart (Pembrey and 



Phillips) . . 99 



7 1 . Photographic Record of Periodic Fatigue under Continuous Stimula- 



tion in. Contractile Response (Filament of Uriclis Lily) . . . 100 



72. Fatigue in the Contractile Response of Indiarubber . . . . 101 



73. Reversed Response of Fatigued Nerve 102 



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



Muscle (Brodie) . . . . . . . . . . 103 



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



of Galena to Hertzian Radiation . ... . . . .103 



76. Photographic Record of Responses of Style of Datura alba in which 



. Growth had come to a Temporary Stop . . . . . . 104 



77. Differential Contractile Response of Artificial Strip .... 108 



78. Responses of Mimosa to Sunlight of not too long Duration . . . 109 



79. Transverse Response of Pulvinus of Mimosa . . . . .no 



80. Diametric Method of Stimulation of an Anisotropic Organ . . . in 



81. The Thermal Variator . . . . . . . . .113 



82. Responsive Current in Petiole of Musa from Concave to Convex Side 115 



83. Parallelism of Natural Current in Pulvinus of Mimosa and Sheathing 



Petiole of Musa . . . . . . . . . . 118 



84. Effect of Variation of Temperature on Natural Current, j, which in 



. Petiole of Musa flows from Convex to Concave Side . . .119 



85. Photographic Record showing effect of Sudden, followed by steady 



Rise of Temperature on Natural Current, 4, > m Musa . . . 120 



86. Action of 7 per cent. Solution of Na 2 CO 3 on Natural Current of Musa 122 



87. Effect of CO 2 on Natural Current of Musa 122 



88. Variation of the Transverse Natural and Responsive Currents in 



. Pulvinus of Mimosa . . . . . . . . . . 127 



89. Photographic Record of Effect of Chloroform on Responses of Carrot . 136 



90. Photographic Record showing Action of Chloral Hydrate on the 



. Responses of Leaf-stalk of Cauliflower . . . . . . 131 



91. Photographic Record showing Action of Formalin (Radish) . . .132 



92. Abolition of Response at both A and B Ends by the. Action of 



NaOH 134 



