INDEX 197 
Recorder, mechanical, 3 
photographie, 11, 22 
response, 19 
Response-curve, characteristics of, 3 
electrical, abnormal, in metal, 123, 125 
9 
” 
” 
a in stale nerve, 11, 123 
S in stale or dying plant, 48, 187 
i in stale retina, 11, 164 
5 converted into normal after strong or con- 
tinuous stimulation in metal, 125, 187 
5 s + in nerve, 124, 187 
fr in plant, 48 
Ebalition of, by fen ee in plant, 32, 64 
- by ‘poison,’ in metal, 148, 189 
: - in nerve, 139, 189 
= in plant, 30, 32, 78, 79, 189 
aaiane effect of stimulus on, in metal, 135 
i - on, in plant, 37 
anesthetics, effect of, on, in nerve, 72 
3 3 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 
5 in nerve, 188 
Re 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 
