3 7 2 I N D E X
Canal rays. See Positive rays
Central Association of German Citizens of the
Jewish Faith. See Central-Verein deutscher
Staatsbürger jüdischen Glaubens
Central-Verein deutscher Staatsbürger jüdischen
Glaubens (Central Association of German
Citizens of the Jewish Faith): AE’s ridi-
cule of the name, 159
letter from AE, 159
Centrifugal force. See Force, centrifugal
Charge, electrical. See Electrical charge
Chemical reactions
sound absorption in, 183–190
velocity of, 183–190
Christoffel, Elwin Bruno (1829–1900), 331
Christoffel symbol. See Connection coefficients
Classical mechanics. See Mechanics, classical
Clausius, Rudolf (1822–1888), 231
Clock, 96, 119
behavior in gravitational field, 69–71, 104,
141
as fundamental concept, 212–214
independence of prehistory, 127, 213
moving, 67–71, 103, 121
paradox, 67–71, 198
physical theory without assumption of, 225
See also Time, measurement of
Concept and experience, 210, 213
Connection coefficients, 329–332; as compo-
nents of gravitational field, 341
Conservation of energy. See Energy-momentum,
law of conservation of
Constructive theory. See Theory, constructive
Continuity equation, 280, 314
Continuum
Euclidean, 131, 364
finite, 218
infinite, 217–218
See also Geometry; Space; Space-time con-
tinuum; and Universe
Continuum theory: limits of applicability of,
214–215
Contraction. See Lorentz-FitzGerald contraction
Conventionalism, 125, 212. See also Poincaré,
Henri, conventionalism of
Coordinate condition: De Donder, 10, 347
Coordinate system, 70, 96, 102
accelerated, 136
Cartesian, 144, 264–268, 270–277, 279,
284–286
Galilean: see Frame of reference, Galilean
Gaussian, 143–150
inertial: see Frame of reference, inertial
rotating, 104, 141
See also Frame of reference
Coordinate transformation. See Transformation
Cosmic pressure. See Cosmological constant, as
negative pressure
Cosmological constant, 35, 36–37, 58, 82, 88
as negative pressure, 31–32, 85, 216, 366–
367
empirical determination of, 205, 216
reasons for introduction of, 83
Cosmological model. See Universe
Cosmological problem. See Newtonian theory of
gravitation, cosmological problems of and
Relativity, general theory of, cosmologi-
cal considerations in
Cosmological term. See Cosmological constant
Cosmology, 31, 358–361. See also Universe
Covariance
under Galilean transformations, 122
general, 147, 205, 211, 321 (see also Relativ-
ity, principle of, general, and general co-
variance)
under linear transformations, 271, 280, 286,
301
under Lorentz transformations, 128 (see also
Relativity, principle of, special, and cova-
riance under Lorentz transformations)
Curvature
scalar, 84, 337
spatial, 86, 104, 321, 352
CV. See Central-Verein deutscher Staatsbürger
jüdischen Glaubens
De Sitter, Willem. See Sitter, Willem de
De Sitter solution, 36–38
Debye, Peter (1884–1966), 197
Deduction. See Method, deductive
Deutscher Zentralausschuß für die Auslandshilfe
(German Central Committee for Foreign Re-
lief), 191
Differential calculus, 325, 339. See also Gauss
ian theory of surfaces; Geometry, Riemanni-
an; and Tensor
Diogenes (ca. 412–323
B.C.), 45