The Concept of Nature — the Tarner Lectures, 1920

Percipient event, 107, 152, 186, 187

Period of time, 51

Permanence, 144

Perpendicularity, 117, 127, 193

Philosophy, i; natural, 29, 30; of

natural science, 46 ; of the sciences,

2
Physical field, 190; object, 155, 156,

157
Physics, speculative, 30

Place, 51

Plane, 191; instantaneous, 91

Plato, 16, 17, 18, 24, 197

Poincare, 121, 122, 123

Point, 35, 89,^91, 114, 173. 176

Point-flash, 172, 173

Point of space, 85

Point, timeless, 192

Point-track, 113, 198

Pompey, 36

Position, 89, 90, 92, 93, 99, 113, 191; absolute, 105, 106, 114, 188

Potential, 183; associate-, 183

Predicate, 18

Predication, 18

Present, the, 69, 72, 177; instantaneous, 72; observational, i85

Primary qualities, 27

Prime, 88

Process, 53, 54; of nature, 54

Psychic additions, 29, 187

Punct, 92, 93, 94

Pythagoreans, 197

Quality, 27
Quantum of time, 162
Quantum theory, 162

Ray of light, 188

ReaUty, 30; of durations, 55, 187

Recognition, 124, 143, 189

Rect, 91, 92

Recurrence, 35

Relative motion, 117; velocity, 130

Relativity, 169; restricted theory

of, 193
Rest, 105, 114, 188, 192
Rotation, 138, 194
Route, 99; momental, 103; straight,

103
Russell, Bertrand, 11, 122, 123

Schelhng, 47

Science, 2; metaphysical, 32
Scientific objects, 149, 158, 169
Secondary qualities, 27
Self-congruence, 196
Self-containedness of nature, 4
Sense-awareness, 3, 67
Sense-object, 149, 170
Sense-perception, 3, 14
Sense-recognition, 143, 189
Series, temporal, 66, 70, 85, 178
Set, abstractive, 61, 79
Significance, 51, 186, 187, 188, 194,

197, 198
Signified events, 52
SimpUcity, 163, 173
Simultaneity, 53, 56, 196
Situation, 15, 78, 147, 148, 152, 160,

189
Solid, 99, loi, 102; vagrant, 101
Sound, 195
Space, 16, 17, 31.33. 79; empty, 145;

timeless, 86, 106, 114; uniformity of, 194 Spaces, instantaneous, 86, 90p. 202 liN L»r<A

Space-system, 179
Space-time manifold, 173
Spatial-order, 95
Spatio-temporal structure, 173
Speculative demonstration, 6
Speculative physics, 30
Standpoint for perception, 107, 188
Station, 103, 104, 113
Stationary events, 19S
Straight line, 91, 114, 191; route,

103
Stratification of nature, 187, 194,

196
Stream of events, 167
Structure of events, 52, 166
Structure, spatio-temporal, 173
Subject, 18

Substance, 16, 18, 19, 150
Substratum, 16, 18, 21
Symmetry, 118, 126; kinetic, 129
System of nature, 146
System, time-, 192

Tamer, Edward, v, r

Temporal order, 64, 95, 194

Temporal series, 56, 70, 85

Tensor, 182

Terminus, 4

The, II

Theory, quantum, 162

There, no, 189

This, II

Thought, 3, 14

Timaeus, the, 17, 20, 24

Time, 16, 17, 31. 33. 49, 79;

measurement of, 140; quantum of,

162; transcendence of, 39
Time-series, 178, also cf. Temporal

series Time-system, see Time-series, also

91, 97, 104, 179, 192
Timeless point, 192; space, 86, 106,

114. 177
Totality, 89

Transcendence of time, 39
Transmission, 26, 28; action by, 159,

190
Tubes of force, 146

Unexhaustiveness, 50
Uniform object, 162
Uniformity of change, 140; of space,
194

Vagrant area, 103 ; solid, loi

Veblen and Young, 36

Velocity, critical, 193, I95; of light,

131, 195; relative, 130
Volume, 92, loi

When, 107
Where, 107
Whole, 58
Within, 63

Young, Veblen and, 36

CAMBRIDGE: PRINTED DY J. B. PEACE, M.A., AT THE UNIVERSITY PRESS.