Index of refraction for light, effect of temperature on, 67
„„„„„, for different rays, 68
Inductoscripts, 221
Inorganic matter, response of, by conductivity variation, 253
„„,„„, by electromotive variation, 266
Invisible image, relapse of, 212
Iron-filings-receiver, effect of heat and mechanical vibration on, 158
„„„, characteristic curve of, 233, 240
Leaf, response of, to light, by electromotive variation, 325
„,„„,„„, by resistivity variation, 319
Light, conductivity variation induced by, 189
„, continuity of effect of, and electric radiation an inorganic receiver, 163
„, effect in allotropic modification of, 141
„,„of continuous action of, 189
„,„„balanced by mechanical vibration, 206
„,„„short exposure of, on AgBr cell, 188
„, response of leaf to increasing intensity and duration of, 320
„, reversal in AgBr cell by, 190
„, electromotive variation curve due to, 213
Magnesium, radio-molecular oscillation produced in, 152
Magnetic Crescograph and Radiometer, 357, 359
Mass action, 133
Mechanical Wave, model for, 78
„Lever Recorder, 261
„stimulation, electromotive force accompanying, 277
Molecular action, 134
„arrest, effect of poison on, 303
„oscillation, 153, 154, 155
„receiver, transition of from non-recovering to self-recovering, 170
Photographic action, theories of, 209
Photo-chemical induction, 215
„„, effect of intermittence in modifying the law of, 216
„„, modification by time-rate of, 218
Photo-electric cell, vegetable form of, 323
Photosynthetic Recorder, 331 Poison, effect of, on inorganic response, 274, 301
„,„, on plant response, 315
Plane of polarisation, rotation by twisted structure of, 107
Polarisation apparatus, for electric ray, 2, 91
Potassium receiver, negative response given by, 151
Quadrant Method, response of leaf by, 317
