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