Naive Realism: 181. "Natural Light": term used by Descartes, 208. Natural Realism: see Realism. Nature: place of mind in, 151-154; order of nature and "free-will," 154-159. Neo-Platonism: referred to, 8; on the soul as immaterial, 103. Nihilism: word used by Hamilton, 186. Noumena: see Phenomena. Objective Idealism: 189-190; reference to Royce, 311. Objective Order: contrasted with the subjective, 55. Ontology: what, 315. Orders of Experience: the subjective and the objective, 55; see also, 114. Other Minds: their existence, 133-136; Fichte referred to, 133; Richter quoted, 133; Huxley and Clifford on proof of, 135; the argument for, 136-140; Mill quoted, 136-138; Huxley criticised, 138-140; what minds are there? 140-144; Descartes quoted, 141-142; Malebranche, 142; the limits of psychic life, 142-144; mind-stuff, 144-146; proper attitude toward solipsism, 291. Outside: meaning of word, 55. Panpsychism: the doctrine, 198; references given, 311. Pantheism: 202. Parallelism: see Mind and Body. Paulsen: on nature of philosophy, 305. Pearson: the "telephone exchange," 38 ff.; on scientific principles and method, 258-259; reference given, 306. Peirce, C. S.: on pragmatism, 219-220. Perception: see Representative Perception. Phenomena and Noumena: Kant's distinction between, 176-180. Philosophical Sciences: enumerated, 13; why grouped together, 13-17; examined in detail, 223-259. Philosophy: meaning of word, and history of its use, 1 ff.; what the word now covers, 12-17; problems of, 32-164; historical background of modern philosophy, 165-180; types of, 181-222; logic and, 225-229; psychology and, 230-234; ethics and, 240-242; aesthetics and, 242-243; metaphysics distinguished from, 244-245; religion and, 250-254; the non-philosophical sciences and, 255-259; utility of, 263-272; history of, 273-287; verification in, 276-277; as poetry and as science, 281-283; how systems arise, 283-287; practical admonitions, 288-303; authority in, 291-296; ordinary rules of evidence in, 296-298. Physiological Psychology: what it is, 234. Pineal Gland; as seat of the soul, 105. Place: of mental phenomena, see Space. Plain Man: his knowledge of the world, 19-20; also, 32-36; his knowledge of space, 73; on mind and body, 106-110; his interactionism, 120. Plants: psychic life in, 143. Plato: use of word "philosopher," 2; scope of his philosophy, 6-7; on the soul, 102-103. Plotinus: the soul as immaterial, 103. Pluralism and Singularism: described, 204-205. Poetry and Philosophy: 281-283. Poincare: referred to, 258. Pragmatism: the doctrine, 219-222; see also, 296-298, 300-303, and 312-314; will to believe, references, 310, 312. Present: meaning of "the present," 97-99.