INDEX

Absolute, 26 Absolute time, 4 Action at a distance, 46 Analysis of large into small, 51, 220 Arithmetic, 35 Atom, 59

Bell, 84 Birkhoff, 72 Black body, 112 Bohr, 190, 192 Born, 222 Boscovitch, 46 Bothe and Geiger, 116 Bridgman, 201 Brownian movement, 107, 129, 143 Bush, 142

Caloric fluid, 59 Campbell, 117 Carnot engine, 125 Causality, 80 ff Causal train of events, 85 Clifford, 28 Clock, 70 ff, 176 Compton, 116, 188 Continuity, 94 Conservation of charge, 135, 136 Conservative functions, 113 Constructs, 53 Correlation, 37 Cosmic units, 182 Cross word puzzle, 202

Descriptive background, 64 Determinism, 114, 209 ff Discontinuous space, 191 Döppler effect, 166 ds, 72

Eddington, 93 Einstein, vii, 1, 2, 3, 4, 7, 8, 9, 12, 13, 14, 64, 100, 155, 162, 163, 164, 167, 169, 170, 171, 172, 173, 175, 176, 177, 206 Electrical concepts, 131 ff Electrical explanation of universe, 50 Electrical mass, 139 Electric field, 56, 133 Empiricism, 3 Energy, 108 ff, 126 ff Euclidean space, 14, 15, 16, 18, 23, 52, 61, 67 Event, 95, 167 Explanation, 37 Explanatory crisis, 41 Extended time, 77

Faraday, 44, 57, 58, 209 Final explanations, 48 First law of thermodynamics, 126 ff Force, 102 ff Foucault pendulum, 180, 184 Fourth dimension, 74 Future, 222

Gauss, 15, 34 "Go and come" time, 112 Gravitational constant, 91

Haldane, 25 Heat flow, 130 Heisenberg, 222 Hertz, 44 Hoernlé, vi

Identity, 91 ff Isolation, 82

Joule, 124

Kelvin, 45, 110 Kinetic theory of gases, 40

Lagrangean equations, 112 Larmor, 149 La Rosa, 164 Length, 9 ff Lewis, 166, 201 Light, 150 ff Local time, 75 Lorentz, 143, 147, 148, 149

Mach, 183 Mass, 102 ff Mathematics, 60 ff Maxwell, 44, 58, 112, 137, 148 Meaningless questions, 28 ff Measurement approximate, 33 Mechanism, 45 Mercury, 105 Michelson, 15, 26 Michelson and Morley, 66 Models, 45, 52

Newton, 4, 110

Operational character of concepts, 5 Operational thinking, 32 Optical space, 67 Ostwald, 109

Penumbra, 34 Perrin, 107 Physical reality, 59 Planck, 69 Poincaré, 48, 115, 116, 190 Pythagoras, 61

Quantum act, 156 Quantum theory, 40, 47, 186

Radiation and temperature, 123 Relative character of knowledge, 25 Relativity, 150 ff Reynolds, 93 Rotational motion, 178 Russell, 205

Schrödinger, 222 Space, 66 Silberstein, 11 Simplicity of nature, 198 Simultaneity, 7, 8 Spring balance, 103 Statistical methods, 115, 117 Stress, 54 Swann, 204

Table top, 106 Tactual space, 67 Temperature, 118 ff Thermodynamics, 117 Thing traveling, 101, 152, 157, 164 Time, 69 Tolman, 201 Truth, 78 Turbulent motion, 120, 124

Velocity, 97 ff, 213 ff Velocity of light, 100

Whitehead, 167 Wilson, 224