INDEX

A B C D E F G H I J K L M

N O P Q R S T U V W X Y Z

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

Anæsthetics, 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 for obtaining response 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 166 effect of temperature on response of photo-sensitive cell produced by, 158 retinal response produced by, 158 relation between intensity and response to, in photo-sensitive cell, 161, 162 in retina, 162 response to, after-oscillation in photo-sensitive cell, 159, 163 effect of increasing length of exposure in photo-sensitive cell, 159 in retina, 160 in frog’s retina, 150, 151, 156, 164, 166 in photo-sensitive cell, 152, 153, 154, 155, 157, 165, 166

McKendrick on retinal response, 149

Mechanical recorder, 3 response, 1 stimulus by electric tapper, 24 by spring-tapper, 23 by vibrator, 24 conditions of maintaining uniformity of, 26 means of graduating intensity of, 22, 24, 96

Metal, electric response in, abnormal, 125 abolition of, by ‘poison,’ 143 additive effect of superposition of stimulus on, 135 annealing, effect of, on, 101 by method of block, 82, 92 negative variation, 87, 183 depressants, effect of, on, 142 diphasic, 113, 114, 115, 116, 188 enhancement of, after continuous stimulation, 127, 128, 186 fatigue, 118, 119, 120, 121, 185. See also Fatigue maximum effect due to superposition of stimuli, 136 modified, 129 ‘molecular arrest,’ effect of, by ‘poison’ on, 145 molecular friction, effect of, on, 108, 109 prolongation of recovery by overstrain, 106 by ‘poison,’ 145 relation between, and stimulus, 134, 135 staircase effect, 122, 186 stimulant, effect of, on, 141 temperature, effect of, on, 111 uniform, 102, 184

Minchin on photo-electric cell, 165

Molecular ‘arrest’ in metals by ‘poison,’ 145 friction, 108, 109 model, 107 voltaic cell, 99

Munck on electric response in sensitive plants, 14

Muscle, fatigue in, 38, 39, 40, 42. See also Fatigue prolongation of recovery by ‘poison’ in, 144 relation between stimulus and response in, 52 staircase effect in, 122 stimulus, effect of superposition of, on, 36

Myograph, 2

Negative variation, response by method of, in metal, 87, 183 in nerve, 9, 183 in plant, 18, 183

Nerve, current of injury in, 7 injured and uninjured contacts corresponding to Cu and Zn in voltaic couple, 8 response in, abnormal, when stale, 124, 187 abolition of, by ‘poison,’ 139, 189 anæsthetics, effect of, on, 72 by method of negative variation, 9 current of action of, 8 enhancement of, after continuous stimulation, 127 modified, 128 relation between, and stimulus, 52 reversed when stale, 11 uniform, 184

Nomenclature, anomalies of present, 9, 85

Photographic recorder, 11, 22

Plant chamber, 64 electrical response in, abnormal, when stale or dying, 48, 187 abolition of, by high temperature, 32, 64 additive effect of stimulus on, 37 anæsthetics, effect of, on, 30, 73, 74, 75 by method of block, 28 of negative variation, 18, 183 diphasic, 46 fatigue, 20, 39, 40, 41, 42, 43, 57, 185. See also Fatigue physiological character, 30 ‘poison,’ effect of, on, 30, 32, 78, 79 relation between, and stimulus, 52, 53, 54 staircase effect, 37, 185 stimulus, effect of single, on, 35 effect of superposition of, on, 35 temperature, effect of, on, 32, 59–69 uniform, 36, 184 radial E.M. response in, 49

Poison, effect of, on response in metal, 143, 189 in nerve, 139, 189 in plant, 30, 32, 78, 79, 189 ‘molecular arrest’ in metal by, 145 prolongation of recovery by action of, in metal, 145 in muscle, 144

Record, simultaneous mechanical and electrical, of response, 13

Recorder, electrical, 11 mechanical, 3 photographic, 11, 22 response, 19

Response-curve, characteristics of, 3 electrical, abnormal, in metal, 123, 125 in stale nerve, 11, 123 in stale or dying plant, 48, 187 in stale retina, 11, 164 converted into normal after strong or continuous stimulation in metal, 125, 187 in nerve, 124, 187 in plant, 48 abolition of, by high temperature in plant, 32, 64 by ‘poison,’ in metal, 143, 189 in nerve, 139, 189 in plant, 30, 32, 78, 79, 189 additive effect of stimulus on, in metal, 135 in plant, 37 anæsthetics, effect of, on, in nerve, 72 in plant, 30, 73, 74, 75 annealing, effect of, on, in metal, 101, 138 by method of block, 28, 82, 92 by negative variation, 9, 18, 87, 183 by relative depression, 87 by relative exaltation, 89 conditions for obtaining, 6, 86, 87 continuous transformation from positive to negative in metal, 115 decline and reversal of, under continuous light in photo-sensitive cell, 166 decline and reversal of, under continuous light in retina, 166 depressants, effect of, on inorganic, 142 diminution of. See Fatigue diphasic in metal, 113, 114, 115, 116, 188 in nerve, 188 in plant, 46, 188 dose, effect of, on inorganic, 89, 146, 189 on, in plant, 79, 189 enhancement of, after continuous stimulation in metal, 127, 128, 186 enhancement of, after continuous stimulation in nerve, 127, 186 maximum effect due to superposition of stimulus, 35, 136 measure of physiological activity, 13 molecular friction, effect of, on, 108, 109 modification, effect of, on, 11, 48, 123, 125, 129, 164, 187 physiological character of, in plant, 30 positive and negative, 11 prolongation of recovery in, by ‘poison’ in metal, 145 prolongation of recovery in, by ‘poison’ in muscle, 144 prolongation of recovery in, from overstrain, 106 relation between, and stimulus in metal, 134, 135 in muscle, 52 in nerve, 52 in plant, 52, 53, 54 in real and artificial retinæ, 162 staircase effect, in metal, 122, 186 in plant, 37, 186 stimulant, effect of, on, in metal, 141 temperature, effect of, on. See Temperature threshold of, 135 to light. See Light uniform in metal, 102, 184 in nerve, 184 in plant, 36, 184 universal applicability of, 12 mechanical, 1 retinal. See Light simultaneous mechanical and electrical record of, 13

Retina. See Light

Sanderson, Burdon-, on electrical response in sensitive plants, 14

Spring-tapper, mechanical stimulus by, 23

Staircase effect in metal, 122, 186 in muscle, 122, 186 in plant, 37, 186

Steiner on retinal response, 149

Stimuli, maximum effect due to superposition of, in metal, 136 in muscle, 36 in plant, 36

Stimulus, advantages of vibrational, 25 and response, relation between, in metal, 134, 135 in muscle, 52 in nerve, 52 in plant, 52, 53, 54 in real and artificial retinæ, 162 effect of different kinds of, 2 mechanical, by spring-tapper, 24 conditions for maintaining uniformity of, 26 means of graduating intensity of, 22, 96 vibrational, 24, 25, 26

Temperature, death-points in plants, 61, 63 effect of, on response in metal, 111 in photo-sensitive cell, 158 in plants, 32, 60–69 in retina, 158 increased sensitiveness in plant due to variation of, 66, 67

Vibrational stimulus, 24, 25, 26

Vision, binocular alternation of, 175 effect of various conditions on the period of binocular alternation of, 177

Visual images, revival of, 177 impression, unconscious, 178 impulse, chemical theory of, 148 electrical theory of, 149 phantoms, 179 recurrence, 174

Vital force, 13

Vitalism, 182

Waller on enhancement of nerve-response after continuous stimulation, 127 on relation between stimulus and response in muscle, nerve, and retina, 52, 162 on retinal response, 150, 156, 165 on reversal of response in stale nerve and retina, 11, 124, 164 on transformation from abnormal to normal response in nerve after continuous stimulation, 124

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