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. 
  Psychology:  psychological knowledge characterized, 25-28;
    attitude of psychologist toward external world, 36-38;
    toward mind, 110-111;
    philosophy and, 230-234;
    double affiliation of, 234-235;
    utility of, 268-269;
    metaphysics and, 313;
    “rational,” 315. 
  Ptolemaic System; 282. 
  Pythagoras:  the word “philosopher,” 2. 
  Pythagoreans:  their doctrine, 4.

  Qualities of Things:  contrasted with sensations, 51-56.

  Rational Cosmology:  315. 
  Rationalism:  the doctrine, 206-209. 
  Rational Psychology:  315. 
  Real:  see Reality. 
  Realism:  hypothetical realism, 168;
    “natural” realism, 174;
    general discussion of realism and its varieties, 181-187;
    ambiguity of the word, 186-187. 
  Reality:  contrasted with appearance, 35;
    in psychology, 36-38;
    the “telephone exchange” and, 38 ff.;
    things and their appearances, 59-61;
    real things, 61-63;
    ultimate real things, 63-68;
    the “Unknowable” as Reality, 68-72;
    real space, 80-87;
    real time, 93-99;
    substance as reality, 111;
    real and apparent extension, 113-114;
    measurement of apparent time, 128;
    Bradley’s doctrine of reality, 191-192;
    Clifford’s panpsychism and reality, 197-198.

  Reflective Thought:  its nature, 28-31. 
  Reid, Thomas:  doctrine of “common sense,” 171-174;
    references, 310. 
  Religion:  philosophy and, 250-254;
    conceptions of God, 252-253;
    God and the world, 253-254; see God. 
  Representative Perception:  plain man’s position, 32-36;
    the psychologist, 36-38;
    “telephone exchange” doctrine, 38-44;
    the true distinction between sensations and things, 45-58;
    the doctrine of, 165-168;
    Descartes and Locke quoted, 165-168. 
  Richter, Jean Paul:  on the solipsist, 133. 
  Royce:  an objective idealist, 311; a monist, 312.

  Schelling:  attitude toward natural philosophy, 10. 
  Schiller:  on “Humanism,” 312-313. 
  “Schools”:  in philosophy, 291-296. 
  Science:  philosophy and the special sciences, 12-17;
    the philosophical sciences, 13 ff.;
    nature of scientific knowledge, 21-28;