ILLUSTRATIONS xvii 



Fit!. PAGE 



43. EFFECT OF CHLOROFORM ON NEKVE RESPONSE . . . . 72 



44. EFFECT OF CHLOROFORM ON THE RESPONSES OF CARROT . 74 



45. ACTION OF CHLORAL HYDRATE ON PLANT RESPONSES . . 75 



46. ACTION OF FORMALIN ON RADISH 75 



47. ACTION OF SODIUM HYDRATE IN ABOLISHING THE RESPONSE 



IN PLANT 78 



48. STIMULATING ACTION OF POISON IN SMALL DOSES IN PLANTS 79 



49. THE POISONOUS EFFECT OF STRONGER DOSE OF KOH . . 79 



50. BLOCK METHOD FOR OBTAINING RESPONSE IN TIN . . . 83 



51. RESPONSE TO MECHANICAL STIMULATION IN A ZN-Cu COUPLE 85 



52. ELECTRIC RESPONSE IN METAL BY THE METHOD OF RELA- 



TIVE DEPRESSION (NEGATIVE VARIATION) . . . .88 



53. METHOD OF RELATIVE EXALTATION 89 



54. VARIOUS CASES OF POSITIVE AND NEGATIVE VARIATION . 90 



55. MODIFICATIONS OF THE BLOCK METHOD FOR EXHIBITING 



ELECTRIC RESPONSE IN METALS 93 



56. EQUAL AND OPPOSITE RESPONSES GIVEN BY Two ENDS OF 



THE WIRE 95 



57. TOP VIEW OF THE VIBRATION CELL 96 



58. INFLUENCE OF ANNEA ING IN THE ENHANCEMENT OF 



RESPONSE IN METALS 101 



59. UNIFORM ELECTRIC RESPONSES IN METALS . . . . 102 



60. PERSISTENCE OF AFTER-EFFECT 105 



61. PROLONGATION OF PERIOD OF RECOVERY AFTER OVERSTRAIN 106 



62. MOLECULAR MODEL 107 



63. 64. EFFECTS OF REMOVAL OF MOLECULAR SLUGGISHNESS IN 



QUICKENED RECOVERY AND HEIGHTENED RESPONSE IN 

 METALS 109,110 



65. EFFECT OF TEMPERATURE ON RESPONSE IN METALS. . . Ill 



66. DIPHASIC VARIATION IN METALS 113 



67. NEGATIVE, DIPHASIC, AND POSITIVE RESULTANT RESPONSE IN 



METALS . 115 



