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;
compared with reflective thought, 29-31;
science and the world as mechanism, 148;
the conservation of energy, 151-154;
philosophical sciences examined in detail, 223-259;
science and metaphysical analysis, 246-247;
the non-philosophical sciences and philosophy, 255-259;
study of scientific principles, 256-259;
verification in science and in philosophy, 275-277;
philosophy as science, 281