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

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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