6
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