Memory, nature of, 9, 13, 231; veracity of, 232, 290; defined, 234; psychology of, 236; physiology of, 237; localization of events in, 238; and sense of personal identity, 241, 283; illusions of, 241; illusory localization, 245, 256; distortions of, 261; hallucinations of, 271; illusions respecting personal identity, 283; relation of, to belief, 295; compared with expectation, 297; and inference, 335. Metempsychosis, 294. Meyer, H., 83, 144. Mill, J.S., 298, note[138], 309. Mirrors, as means of delusion, 73. Misanthropist, 2, 323. Mitchell, Dr. Weir, 62. Monomania, 111. Moral, intuition, 216; self-inspection, 204. Motor illusions. _See_ Muscular sense. Movement, apparent, 50, 57, 73, 81, 95, 107; in dreams, 142, 154. Mueller, Johannes, 58, note[27], 100, 117, 143. _Muscae volitantes_, 118, note[62]. Muscular sense, in perception, 23; illusions connected with, 50, 57, 62, 66; co-operation, of, in dreams, 142, 154. Music, subjective interpretation of, 223. N. Natural selection, effect of, in eliminating error, 340. Nature, personification of, 224; uniformity of, 344, 360. Necessity, idea of, 349, 360. Nervous system, and conditions of perception, 31; connections of, 32, 169; function of, and force of stimulus, 47, 50; prolonged activity of, 55; specific energy of, 58; variations in state of, 64; fatigue of, 65, 115; disease of, _ibid._; nervous conditions of hallucination, 112, 115; nervous dissolution and evolution, 122; condition of, in sleep, 131; in hypnotic condition, 186; nervous conditions of memory, 237; nervous conditions of illusion in general, 334. Normal life, relation of, to abnormal, 1, 121, 124, 182, 277, 284, note[132]; hallucinations of, 116. O. Object, nature of, 36, 353. Objective and subjective experience, 26, 27, 137, 214. Old age, dreams how regarded in, 276. Oneirocritics, 129. Opera, illusion connected with, 104. Optimism, 323, 327, 342. Organic sensations, discrimination of, 41; interpretation of, 99; in sleep, 145, 148. Organism, conditions of illusion in, 47, 50; relation of our conception of the universe to sensibilities of, 343. Orientation, 125, 138. P. Pain, recollection of, 264, 270. Painting, representation of third dimension by, 77; apparent movement of eye in portrait, 81; discrepancies between, and object in magnitude and luminosity, 88; realization of, and mental preparation, 105; realization of, by animals, 105. Paraesthesia, 68. Paralysis of ocular muscles, 66. Passive, and active factor in perception, 27; and active illusion, 45. Percept, 22; and sense-impression, 59.