ILLUSTRATIONS 



XXXI 



FIG. 

 63- 

 64- 



6 5 . 



66. 

 67. 



68. 



69. 



70. 



72. 

 73- 

 74- 



75- 

 76. 



77- 

 78. 



79- 

 80. 

 81. 

 82. 

 83- 



84. 

 85. 



86. 

 87- 



89. 

 90. 



92. 



Effect of Over-strain in producing Fatigue ..... 94 

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

 stalk of Celery (Electrical Response) 96 



Photographic Records of Normal Mechanical Response of Mimosa to 

 Single Stimulus (upper figure), and to Continuous Stimulation 

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



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



Oscillatory Response of Arsenic acted on Continuously by Hertzian 

 Radiation ........... 98 



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

 flower ; (b} 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 

 Photographic Record of Periodic Fatigue in the Automatic Pulsation 



of Desmodium gyrans . . . . . 99 



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



Phillips) 99 



Photographic Record of Periodic Fatigue under Continuous Stimula- 

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

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



Reversed Response of Fatigued Nerve . . . . . .102 



Preliminary Staircase, followed by Fatigue, in the Responses of 



Muscle (Brodie) 103 



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

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



Photographic Record of Responses of Style of Datura alba in which 

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



Differential Contractile Response of Artificial Strip .... 108 



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

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



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

 The Thermal Variator . . . . . . . . H3 



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

 Parallelism of Natural Current in Pulvinus of Mimosa and Sheathing 



Petiole of Musa 118 



Effect of Variation of Temperature on Natural Current, ! , which in 



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

 Photographic Record showing effect of Sudden, followed by steady 

 Rise of Temperature on Natural Current, ^, in Musa . . . 

 Action of 7 per cent. Solution of Na^COa on Natural Current of Musa 



120 

 122 



122 



Variation of the Transverse Natural and Responsive Currents in 

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



Photographic Record of Effect of Chloroform on Responses of Carrot . 130 

 Photographic Record showing Action of Chloral Hydrate on the 



, Responses of Leaf-stalk of Cauliflower 131 



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

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

 NaOH 134 



