Blessed gods (Hegel), 147, 155 Bohr, N., 2, 185, 191, 196, 220, 306 Boltzmann, L., 63 Bombardment, molecular, 113, 131 Born, M., 208 Bose, S. N., 203 Bragg, W. H., 194 Brain, 260, 268, 279, 311, 323 Broad, C. D., 160 de Broglie, L., 201, 202 Building material, 230 Bursar, 237 Casual and essential characteristics, 142 Categories, xi, 105 Causality, 297 Cause and effect, 295 Cepheid variables, 165 Chalk, calculation of motion of, 107 Chance, 72, 77, 189 Classical laws and quantum laws, 193, 195, 308 Classical physics, 4 Clifford, W. K., 278 Clock, 99, 134, 154 Code-numbers, 55, 81, 235, 277 Coincidences, 71 Collection-box theory, 187, 193 Colour and wave-length, 88, 94, 329, 341 Commonsense knowledge, 16 Companion of Sirius, 203 Comparability of relations, 232 Compensation of errors, 12 [Pg 356] Concrete, 273 Configuration space, 219 Conservation, laws of, 236, 241 Constellations, subjectivity of, 95, 106, 241 Contiguous relations, 233 Contraction, FitzGerald, 5, 24; reality of, 32, 53 Controlling laws, 151, 245 Conversion, 336 Conviction, 333, 350 Co-ordinates, 208, 231 Copenhagen school, 195 Correspondence principle, 196 Counts of stars, 163 Crudeness of scale and clock survey, 154 Curvature of space-time, 119, 127, 157; coefficients of, 120, 155 Cyclic method of physics, 260, 277, 348 Cylindrical curvature, 139 Darwin, G. H., 171 Deflection of light by gravity, 122 Demon (gravitation), 118, 309 Dense matter, 203 Design, 77 Detailed balancing, principle of, 80 Determinism, 228, 271, 294, 303, 310 Differential equations, 282, 329, 341 Diffraction of electrons, 202 Dimension, fourth, 52; beyond fourth, 120, 158, 219 Dirac, P. A. M., 208, 219, 270 Directed radius, 140 Direction, relativity of, 26 Distance, relativity of, 25; inscrutable nature of, 81; macroscopic character, 155, 201 Door, scientific ingress through, 342 Doppler effect, 45, 184 Double stars, 175 Dual recognition of time, 51, 91, 99, 334, 352 Duration and becoming, 79, 99 Dynamic quality of time, 68, 90, 92, 260 Eclipses, prediction of, 149, 299 Ego, 97, 282, 315 Egocentric attitude of observer, 15, 61, 112 Einstein, A., 1, 53, 111, 185, 203 Einstein’s law of gravitation, 120, 139, 151, 260; law of motion, 124 Einstein’s theory, 20, 111 Electrical theory of matter, 2, 6 Electromagnetism, 236 Electron, 3; mass of, 59; extension in time, 146; in the atom, 188, 199, 224; nature of, 279, 290 Elephant, problem of, 251 Elliptical space, 289 Elsewhere, 42 Emission of light, 183, 191, 216 Encounters of stars, 177 Engineer, superseded by mathematician, 104, 209 Entropy, 74, 105 Entropy-change and Becoming, 88 Entropy-clock, 101 Environment, 288, 328 Epistemology, 225, 304