Chapter XV

, 59; touch, 62; defined, 244; conditions which favor, 245; sensation of difference, 246; differences inferred, 248; analysis of compound objects, 249; to be easily singled out a quality should already be separately known, 250; dissociation by varying concomitants, 251; practice improves discrimination, 252; of space, 338 See _Difference_

'Disparate' retinal points, 35

Dissection, of sheep's brain, 81

_Distance_, as seen, 39; between members of series, 24; in space, see _Third dimension_

Distraction, 218 ff.

Division of space, 338

DONALDSON, 64

Double consciousness, 206 ff.

Double images, 36

Double personality, 205

Duality of brain, 205

DUMONT, 135

Dura mater, 82

Duration, the primitive object in time-perception, 280; our estimation of short, 281

Ear, 47 ff.

Effort, feeling of, 434; feels like an original force, 442; volitional effort is effort of attention, 450; ethical importance of the phenomena of effort, 458

Ego, see _Self_

Embryological sketch, Chapter VII , 78

Emotion,