682 INDEX Cathode rays (cont.) AE's comments on, 131 polemic between Jakob Laub and Erich Marx on, 121 pro- duction by X-rays of, AE's comments on, 428 Cavallo, Tiberius, induction machine of, 51 Central Swiss Meteorological Institute, 505n Charge, elementary: AE's comments on explanation of, 88 relation with Planck's constant: 89n, AE's comments on, 195, 321, H. A. Lorentz's comments on, 178 Chavan family: visit to AE, 238 Chavan, Lucien (1868-1942), 125n and AE's honorary doctorate at University of Geneva, 202n assistance in AE's registra- tion of change of address, 211n death of father-in-law, AE's condolences, 273 gift of tea by AE, 241 invited by AE, 233, 234, 507 requested by AE to send resis- tor, 240 requested by AE to send telephones, 241 sends AE resistor, 247 Swiss Telegraph Administration: appoint- ment at, 224n, 234n, difficulties at, 234, 288n, 289, 315, 507, AE on difficulties at, 290, 314, 340, 396, Ludwig Forrer's involvement in difficulties at, 304 takes days off, 197 thanked by AE for gift, 224 tutored by AE, 160n, 224n visit by AE in Bern, 239, 241 work on buzzing device, AE's comments on, 235 work on trans- formers, AE's comments on, 235 Chavan, Lucien and Jeanne: AE's planned visit to, 542 congratulations on AE's ETH appointment, 387 invited by AE, 286 Chavan-Perrin, Jeanne (1866-1958), 132n, 211n, 224n, 234n, 237n, 240n, 242n, 274n, 286n, 289n, 507 letter from Einstein-Marid, Mileva, 508n Cholera, 556 Claparede, Alfred de: letter from Gnehm, Robert, 529n letter to Gnehm, Robert, 529n letter to Schmidt-Ott, Friedrich, 529n Classen, Johannes W.: value for specific charge of electron, 138n Clausius, Rudolf (1822-1888), 300 Clocks, rate of moving, AE on, 453 Coehn, Alfred (1863-1938), 227n AE's comments on paper by, 227 Cohn, Emil (1854-1944), 74, 75n College de France: AE's planned Michonis lectures at, 571 Collisions, of atoms and electrons: AE on mechanism of, 338 Arnold Sommerfeld's hypothesis for, 321, 338 Cologne, GDNA meeting in, 89n, 105n, 136, 136n, 149n, 152 Columbia University, invitation for lectures at, 388, AE declines, 395, 397, 404 Como, Lake, 543n Compressibility, Michele Besso's idea for measurement of, 338 Conductivity, electrical: AE on, 337, 338 relation with temperature, AE on, 281 of metals, Michele Besso on, 319, 342 Constructive theory, 89n Contacts, electrical: AE on, 237 AE's and Albert Gockel's work with, 162 Contraction hypothesis: Jakob Laub's com- ments on Friedrich Hasenöhrl's proof of, 107 Cornu, Georges, 243 Covariance, general. See Gravitation, relati- vistic theory of Critical opalescence. See Opalescence Cunningham, Ebenezer (1881-1977): discus- sion with Alfred Bucherer, 134, 135n, 137-138 Curie, Eve (*1905), 346n, 519n, 545n Curie, Irene (1897-1956), 346n, 519n AE's comments on, 544 Curie, Marie (1867-1934), 300, 302n, 349, 383, 522n, 541n, 543n AE's comments on, 345, 544 AE's impressions of visit to, 518 alleged affair with Paul Langevin, AE comments on, 345 Heinrich Zangger's attendance of lectures of, 332 hiking trip with AE in Maloja region, 543n letter from Einstein-Marid, Mileva, 519n writes letter of recommendation for AE, 353n Dahms, Albert (1872-?), 98n Dällenbach, Walter (1892-1990), 602 takes classes with AE at ETH, 602n Dalton's law, 280