3 9 0 I N D E X modification necessary in quantum theory, 375 as prerequisite for science, 3–4 probabilistic, 4 strict and probabilistic, 11 Cecil, Robert (1864–1958), 381 Ceylon, 302, 319, 364 Chaluz, 323 Chavan, Lucien (1868–1942), 135, 257, 296, 327, 382 Chemical reactions, velocity of, 104 Christiania, 378 Ehrenfest visits, 27 Christoffel, Elwin Bruno (1829–1900), intro- duced connection coefficients, 352 Chrysanthemum festival, 309 Chulanovsky, Vladimir M. (1889–1969), 101 Clarté, 162 Rolland on, 144 Clausius, Rudolf (1822–1888), 4 Collège de France, 76, 82, 86, 109, 113 151, 168, 217, 222 AE’s lectures at, 99, 102, 103, 104– 105, 115, 128 Colloid chemistry, 236 in U.S., 275 Colombo, 301, 319 Comert, Pierre (1880–1964), 281, 282, 295, 379 Committee on Intellectual Cooperation AE invited to join, 168, 175, 176 motives for, 197 AE resigns from, 210, 379, 380 Curie on, 213, 217 reason for resignation, 209, 219, 220, 222, 228, 239 AE on substitute in, 281, 287, 295 Wertheimer declines to be substitute, 285 Besso on, 381 Curie accepts membership in, 175 Epstein on, 203 establishment of, 167 first meeting of, 243 Kraus as possible member of, 282 members of, 168 Millikan, proposed, 203 requests proposal for member, 282 2nd session, agenda of, 281 Conduction chains, in superconductivity, 94 Conductivity, in metals, 91 Connection, affine as basis for general relativity, 365 concept of, 351 symmetry condition, 352, 366 Contu, Rafaele (1895–1952), 350 Einstein 1905r, Italian edition, 350 Einstein 1918k, Italian edition, 350 Einstein 1920j, Italian edition, 350 Einstein 1921b, Italian edition, 350 Cooler, 21, 71, 83 Coordinates, cyclic, 253 Correspondence principle, 113 Cosmological problem, 235 AE lectures on, 312 static two-particle solution, 330 Cosmology cosmic length, 368 cosmological term in field equations, 369 Friedmann’s investigation of negative curvature, 335 non-stationary world, 271 solution of field equations, 333 Jaffe on, 214 Milky Way and spiral nebulae, 291 Newtonian theory, 291 Seeliger on, 291 Selety’s “molecular-hierarchic” world, 291 spatially infinite world, 280 spatial topology, 235 spherical space, story of the beetle, 303 Courant, Richard (1888–1972), 44, 255 invites AE to play music for Hilbert, 39 Crete, 298 Croiset, Maurice (1846–1935), 86 invites AE to lecture and AE accepts, 106 on schedule of AE’s lectures in Paris, 104 Crystals, conduction of, 244 Curie-Sk odowska, Marie (1867–1934), 81, 168, 281, 287 on AE’s resignation from Committee on Intellectual Cooperation, 213, 217 hopes AE accepts membership on Committee on Intellectual Cooperation by, 175 AE accepts, 175 Current density, 360, 368, 370 in unified field theory, 357 in Weyl’s theory, 301 Curti, Oscar, 178 Czerniawski, Aharon (1887–1966), 323, 324 Dalekarlien, 378 Debye, Peter (1884–1966), 82, 260, 195