of laws that know no change, acting equally and uniformly throughout the
organic and the inorganic worlds.

FOOTNOTES:

[21] Verworn, _General Physiology_, p. 18.

INDEX

Action current
in metal, 88
in nerve, 8
in plant, 19

After-images and their revival, 177

After-oscillation in photo-sensitive cell, 159, 163

Anaesthetics, effect on response
in nerve, 72
in plant, 30, 73, 74, 75

Annealing, effect on response in metal, 101, 138

Binocular alternation of vision, 175

Block method, advantages of, 28, 77
for obtaining response
in metal, 82
in plant, 28

Chloral, effect on plant response, 75

Chloroform, effect on
nerve response, 72
plant response, 74

Compensator, 22

Current of injury in nerve, 7

Curves, characteristics of response, 3

Death-point, determination of, in plants, 61, 63

Depressants, effect on inorganic response, 142

Depression, response by relative, 87

Dewar on retinal current, 149

Diphasic variation
in metal, 113, 114, 115, 116, 188
in nerve, 188
in plant, 46, 188

Dose, effect on
inorganic response, 89, 146, 189
plant response, 79, 189

Electrical recorder, 11

Electrical response. _See_ Response, electrical

Electric tapper, 24

Exaltation, response by relative, 89

Fatigue,
absence of, under certain conditions,
in metal, 120
in muscle, 39
in plant, 39
apparent, with increased frequency of stimulation,
in metal, 120
in muscle, 40
in plant, 40
diminution of response under strong stimulus due to, in plant, 57
in metal, 118, 119, 185
in muscle, 118, 185
in plant, 20, 185
due to overstrain, 41
rapid, under continuous stimulation
in metal, 121, 130
in muscle, 42, 130
in plant, 42, 130
removal of, by rest in plant, 43
theory of, in muscle, 38, 185

Holmgren on retinal current, 149

Hysteresis, 137

Injury, current of, in nerve, 7

Inorganic response. _See_ Metal, electrical response in

Kuhne on retinal current, 149

Kunkel on electrical changes by injury or flexion in plant, 14, 70

Light,
after-effect of short exposure to,
on photo-sensitive cell, 171
on retina, 171
decline and reversal of response under continuous,
in photo-sensitive cell, 166
in retina 16