Page:Eddington A. Space Time and Gravitation. 1920.djvu/231

 INDEX


 * Absolute, approached through the relative, 82
 * Absolute acceleration, 68, 154, 194
 * Absolute past and future, 50
 * Absolute rotation, 152, 164, 194
 * Absolute simultaneity, 12, 51
 * Absolute time, in cylindrical world, 163
 * Acceleration, a simpler quality than velocity, 195; modifies FitzGerald contraction, 75
 * Action, 147; atomicity of, 199; on Weyl's theory, 177
 * Action, Principle of Least, 149, 178
 * Addition of velocities, 59
 * Aether, a plenum with geodesic structure, 164; identified with the "world," 187; non-material nature of, 39; stagnant, 210
 * Artificial fields of force, 64
 * Atom, vibrating on sun, 128
 * Atomicity, law of, 199; of Action, 177
 * Aviator, space and time-reckoning of, 23


 * Bending of light, effect on star's position, 112; observational results, 118; theory of, 107, 207
 * Beta particles, 59, 145
 * Brain, constitution of, 191
 * Brazil, eclipse expedition to, 117


 * Causality, law of, 156
 * Causation and free will, 51
 * Centrifugal Force, compared with gravitation, 41, 65; debt at infinity, 157; not caused by stars, 153; vibrating atom in field of, 129
 * Chess, analogy of, 184
 * Christoffel, 89
 * Circle in non-Euclidean space, 104
 * Clifford, 77, 152, 192
 * Cliquishness, 188
 * Clock, affected by velocity, 58; on sun, 74, 128; perfect, 13; recording proper- time, 71
 * Clock-scale, 58
 * Clock-scale geometry, not fundamental, 73, 131, 191
 * Coincidences, 87
 * Comets, motion through coronal medium, 121; radiation-pressure in, 110
 * Conservation of electric charge, 173; of energy and momentum, 139; of mass, 141, 196
 * Content contrasted with structural form, 192, 200
 * Continuous matter, 91, 140
 * Contraction, FitzGerald, 19, 54
 * Convergence of physical approximations, 154
 * Coordinates, 77
 * Coordinate velocity, 107
 * Corona, refraction by, 121
 * Cottingham, 114
 * Crommelin, 114, 122
 * Curvature, degrees of, 91; identified with action, 148; merely illustrative, 84; of a globe of water, 148; of space and time, 158; on Weyl's theory, 176; perception of, 190
 * Cylinder and plane, indistinguishable in two dimensions, 81
 * Cylindrical world, Einstein's, 161, 177


 * Davidson, 114
 * Deflection of light, effect on star's position, 112; observational results, 118; theory of, 107,207
 * Density, effect of motion on, 62
 * Displacement of spectral lines, 129; in nebulae, 161 ; in stars, 135
 * Displacement of star-images, 112, 115
 * Double stars and Einstein effect, 133
 * Duration, not inherent in external world, 34