6 5 8 I N D E X
Clausius, Rudolf (1822–1888), 422
Clemenceau, Georges (1841–1929), 217n
Clock, 197, 251
behavior in gravitational field, 116–117, 168,
209, 214, 271
as fundamental concept, 352–353, 390–392,
416n
independence of prehistory, 257, 391
moving, 115–117, 208, 213, 252
paradox, 102, 105, 115–117, 121n, 346, 348n
physical theory without assumption of, 413
See also Time, measurement of
CODP. See Central Organization for a Durable
Peace
Cohn, Hans: letter to AE, 287n
Colin, Paul (1890–1943), 216–217n; letter to
AE, 217n
Color, theory of, 205n
Columbia University, 629
Communism, 124n
Compton, Arthur H. (1892–1962), 53n
Concept and experience, 352, 387–388, 390
Conformal theory, xxvii
Connection coefficients, 158–159, 178n, 180n,
183n, 188n, 544–545; as components of grav-
itational field, 551
Conservation of energy. See Energy-momentum,
law of conservation of
Constant
of integration, 140n
universal, 140n
Constructive theory. See Theory, constructive
Continuity equation, 97, 513, 534
Continuum
Euclidean, 261, 566
finite, 397–398
infinite, 396–397
See also Geometry; Space; Space-time con-
tinuum; and Universe
Continuum theory: limits of applicability of,
351, 392–393, 404n
Contraction. See Lorentz-FitzGerald contraction
Conventionalism, xxxvi, 220n, 256, 389–390,
403n–404n. See also Poincaré, Henri, con-
ventionalism of
Coordinate condition, 26n; De Donder, 13, 555
Coordinate system, 117, 197, 207, 213
accelerated, 266, 281n
Cartesian, 273, 502–505, 507, 509–510, 512,
515–516
Galilean: see Frame of reference, Galilean
Gaussian, 272–278, 377, 409, 618
inertial: see Frame of reference, inertial
isotropic, 26n
linearized harmonic, 574n
question of preferred, in general relativity,
355–356
rotating, 208, 214, 270, 355, 358n, 371n
See also Frame of reference
Coordinate transformation. See Transformation
Copernicus, Nicholas (1473–1543), xxxii, 433n
Cosmic pressure. See Cosmological constant, as
negative pressure
Cosmological constant, 26n, 36n, 41–42n, 46–
47, 73, 80n, 131, 138, 182n–183n, 188–189n,
433n, 457n
as negative pressure, xxviii, 35–36n, 135,
140n, 171, 174, 182n–183n, 395, 424n,
456–457n, 567–568, 576n
empirical determination of, xxviii, 370–371n,
377, 395, 409, 424n
reasons for introduction of, xxxiii, 36n, 121n,
133, 146n, 371n, 405n
Cosmological model. See Universe
Cosmological problem. See Newtonian theory of
gravitation, cosmological problems of and
Relativity, general theory of, cosmological
considerations in
Cosmological term. See Cosmological constant
Cosmology, xxiv, xxviii, 35, 170, 187, 562–564.
See also Universe
Council of People’s Deputies. See Germany, Rat
der Volksbeauftragten
Covariance
under Galilean transformations, 254
general, 42n, 177n, 275, 370–371n, 377, 389,
409, 539, 574n (see also Relativity, prin-
ciple of, general, and general covariance)
under linear transformations, 507, 513, 516,
526
under Lorentz transformations, 258 (see also
Relativity, principle of, special, and cova-
riance under Lorentz transformations)
Crommelin, Andrew (1865–1939), xxx
Curvature
scalar, 134, 160, 182n, 549
spatial, 136, 209, 214, 538, 558
CV. See Central-Verein deutscher Staatsbürger
jüdischen Glaubens