Space, Time and Gravitation: W. de Sitter: The Observatory, No. 505, p. 412. Taylor & Francis, Fleet Street, London.

The Total Eclipse of 29th May, 1919, and the Influence of Gravitation on Light: A. S. Eddington, ibid., March 1919.

Discussion on the Theory of Relativity: M. N. Roy. Astron. Soc., vol. LXXX. No. 2, p. 96, December 1919.

The Displacement of Spectrum Lines and the Equivalence Hypothesis: W. G. Duffield, M. N. Roy. Astron. Soc., vol. LXXX.; No. 3, p. 262, 1920.

Space, Time and Gravitation: A. S. Eddington, Camb. Univ. Press, 1920.

ALSO, CHAPTERS IN

The Mathematical Theory of Electricity and Magnetism: J. H. Jeans (4th edition). Camb. Univ. Press, 1920.

The Electron Theory of Matter: O. W. Richardson. Camb. Univ. Press.

INDEX

Aberration, [49]
Absorption of energy, [46]
Acceleration, [64], [67], [70]
Action at a distance, [48]
Addition of velocities, [16], [38]
Adjacent points, [89]
Aether, [52]
—drift, [52], [53]
Arbitrary substitutions, [98]
Astronomy, [7], [102]
Astronomical day, [11]
Axioms, [2], [123]
truth of, [2]
Bachem, [131]
Basis of theory, [44]
"Being," [66], [108]
β-rays, [50]
Biology, [124]
Cartesian system of co-ordinates, [7], [84], [122]
Cathode rays, [50]
Celestial mechanics, [105]
Centrifugal force, [80], [130]
Chest, [66]
Classical mechanics, [9], [13], [14],
[16], [30], [44], [71], [102], [103], [124]
—truth of, [13]
Clocks, [10], [23], [80], [81], [94], [95], [98]-[100], [102], [113], [129]
—rate of, [129]
Conception of mass, [45]
—position, [6]
Conservation of energy, [45], [101]
—impulse, [101]
—mass, [45], [47]
Continuity, [95]
Continuum, [55], [83]
—two-dimensional, [94]
—three-dimensional, [57]
—four-dimensional, [89], [91], [92],
[94], [122]
—space-time, [78], [91]-[96]
—Euclidean, [84], [86], [88], [92]
—non-Euclidean, [86], [90]
Co-ordinate differences, [92]
—differentials, [92]
—planes, [32]
Cottingham, [128]
Counter-Point, [112]
Co-variant, [43]
Crommelin, [128]
Curvature of light-rays, [104], [127]
space, [127]
Curvilinear motion, [74]
Cyanogen bands, [131]
Darwinian theory, [124]
Davidson, [128]
Deductive thought, [123]
Derivation of laws, [44]
De Sitter, [17]
Displacement of spectral lines,
[104], [129]
Distance (line-interval), [3], [5], [8],
[28], [29], [84], [88], [109]
—physical interpretation of, [5]
—relativity of, [28]
Doppler principle, [50]
Double stars, [17]
Eclipse of star, [17]
Eddington, [104], [128]
Electricity, [76]
Electrodynamics, [13], [19], [41], [44],
[76]
Electromagnetic theory, [49]
—waves, [63]
Electron, [44], [50]
—electrical masses of, [51]
Electrostatics, [76]
Elliptical space, [112]
Empirical laws, [123]
Encounter (space-time
coincidence), [95]
Equivalent, [14]
Euclidean geometry, [1], [2], [57],
[82], [86], [88], [108], [109], [113], [122]
—propositions of, [3], [8]
Euclidean space, [57], [86], [122]
Evershed, [131]
Experience, [49], [60]
Faraday, [48], [63]
FitzGerald, [53]
Fixed stars, [11]
Fizeau, [39], [49], [51]
—experiment of, [39]
Frequency of atom, [131]
Galilei, [11]
—transformation, [33], [36], [38], [42],
[52]
Galileian system of co-ordinates,
[11], [13], [14], [46], [79], [91], [98],
[100]
Gauss, [86], [87], [90]
Gaussian co-ordinates, [88]-[90], [94],
[96]-[100]
General theory of relativity,
[59]-[104], [97]
Geometrical ideas, [2], [3]
—propositions, 1
——truth of, [2]-[4]
Gravitation, [64], [69], [78], [102]
Gravitational field, [64], [67], [74],
[77], [93], [98], [100], [101], [113]
——potential of, [130], [131]
Gravitational mass, [65], [68], [102]
Grebe, [131]
Group-density of stars, [106]
Helmholtz, [108]
Heuristic value of relativity,
[42]
Induction, [123]
Inertia, [65]
Inertial mass, [47], [65], [69], [101],
[102]
Instantaneous photograph
(snapshot), [117]
Intensity of gravitational field,
[106]
Intuition, [123]
Ions, [44]
Kepler, [125]
Kinetic energy, [45], [101]
Lattice, [108]
Law of inertia, [11], [61], [62], [98]
Laws of Galilei-Newton, [13]
—of Nature, [60], [71], [99]
Leverrier, [103], [126]
Light-signal, [33], [115], [118]
Light-stimulus, [33]
Limiting velocity (