discrete flow of time, 282;
long intervals conceived symbolically, 283;
we measure duration by events that succeed in it, 283;
variations in our estimations of its length, 283;
cerebral processes of, 286
Touch, 60 ff.;
centre of, in cortex, 116;
images of, 308
Transcendental self or ego, 196
Transitive states of mind, 160
Translation, sense of, 76
Trapezium, 85
Turner, Dr. J. E., 440
Tympanum, 48
Types of decision, 429

Unity of the passing thought, 196
Universal conceptions, 240
Urbantschitch, 25

Valve of Vieussens, 80, 86
Variability of the emotions, 381
Varying concomitants, law of disassociation by, 251
Ventricles, 79 ff.
Vierordt, 71
Vision, 28 ff.;
binocular, 33-9;
of solidity, 37
Visual centre of cortex, 110, 115
Visual imagination, 302
Visualizing power, 302
Vividness, determines association, 264
Volition, see Will
Volkmann, 285
Voluminousness, primitive, of sensations, 335
Voluntary acts, defined, 92;
voluntary attention, 224;
voluntary trains of thought, 271

Weber's law, 17, 24, 46, 59
Weber's law—weight, 66;
pain, 67
Weight, sensibility to, 66 ff.
Wernicke, 109, 113, 115
Wesley, 223
Wheatstone, 347
Wigan, 300
Will, Chapter XXVI;
voluntary acts, 415;
they are secondary performances, 415;
no third kind of idea is called for, 418;
the motor-cue, 420;
ideo-motor action, 432;
action after deliberation, 428;
five types of decision, 429;
feeling of effort, 434;
healthiness of will, 435;
defects of, 436;
the explosive will: (1) from defective inhibition, 437;
(2) from exaggerated impulsion, 439;
the obstructed will, 441;
effort feels like an original force, 442;
pleasure and pain as springs of action, 444;
what holds attention determines action, 448;
will is a relation between the mind and its ideas, 449;
volitional effort is effort of attention, 450;
free-will, 455;
ethical importance of effort, 458
Willing terminates with the prevalence of the idea, 449
Wundt, 11, 18, 25, 58, 122, 123, 125, 127, 220, 281