INDEX 411 Calculus of variations (Variationsrechnung), 212 Caloric engines. See Heat engines Calorimeter, water (Wasserkalorimeter), 75, 88-92 Canneto sull'Oglio, province of Mantua, Italy, lv n, 215n, 281n, 375 Cannstatt (now part of Stuttgart), home of AE's maternal grandparents, xlix, lvi n, 380, 384 Canova, Antonio (1757-1822), 302 Capacitance (Kapazität): of cables (insulated wires), 169-170, 171 of condensers, 171- 172 measurement of, 162-167 Capacitor: effect of dielectric on capacitance of, 170-172 with large capacitance, 171-172 Leyden jar as, 168 measurement of charge on, 167-168 Capillarity (Kapillarität): AE discusses with Michele Besso, 285 AE submits first paper on, 273, 375 historical background and sur- vey of AE's thought and work, 264-265 in- fluence on AE of Minkowski's ETH lecture, 265 joint work with MM on, 267, 285 Caprotti, Selina (1850-1907), 56n, 58n Cardinal Inn, Schaffhausen, AE's residence, 326n, 327n, 376 Carnot cycle, 110-120 Casale, Italy, 283 Casteggio, Italy, 372 Cathode rays, AE's enthusiasm for Lenard's experiments on, 224, 236 Central forces. See Molecular forces Central (Hotel Central), Zurich, 298 Certificate of Citizenship (Heimatschein), 45, 55n Charge carriers, 236, 237. See also Electron theory of metals Electrons Charged bodies, specific heat of, 238 Chemical reactions, AE's study of, 286 Chemistry: AE's Aargau Kantonsschule Ma- tura, 41-42 physical, 267 Chiasso, Swiss border crossing to Italy, 216 Chicago Congress. See World's Fair Interna- tional Congress of Electricians Circuits, electrical. See Electrical circuits Citizenship. See Swiss citizenship German citi- zenship AE, citizenship Clapeyron, Benoit-Pierre-Emile (1799-1864), 120n Clausius, Rudolf (1822-1888), 85n, 118n Clausius's theorem (Virial theorem), 122-123 Clausius-Clapeyron equation, 135 Colico, Italy, 301, 302n Como, Italy, 293, 297, 298n, 301, 302n, 376 Condenser (Kondensator). See Capacitor Conduction, heat. See Heat conduction Conductivity, electrical. See Electrical conduc- tivity Conductivity, thermal. See Thermal conductiv- ity Conductor, electrical. See Electrical conductor Congres International des Electriciens, Paris 1889, 191, 207 Constructive theories (konstruktive Theorien), xli Contact electricity (Kontaktelektrizität), 178- 181 Corbetta, Pietro, 282n Coulomb's law, 150-156 Current. See Electric current Czellitzer, Arthur, xlviii n Dampf. See Vapor Dampfwärme. See Heat of vaporization Daxenberger, Franziska, to AE, 25 June 1946, 5 Daxenberger, Otto, 5 Degenhart, Joseph, lxi, lxiii, 351 Derzbacher, Julius. See Koch, Julius Dielectric constant (Dielektrizitätskonstante), 170-172 Dielectrics, 170-172 Differential equations (Differentialgleich- ungen), 212 Diffusion, coefficients of, 265, 292 Dilute solutions, 292 Diogenes (fl. 435 b.c.), 326 Diplomarbeit. See ETH, Diplomarbeit, AE's MM, Education Diptmar, Joseph, 349, 350 Dispersion, optical, 283n Dissociation, 285 Doctoral dissertation. See AE, Doctoral disser- tation MM, Education Doeberl, Michael, 347 Dolderstraße 17, Zurich, AE's address, 267, 269, 272, 277, 375 Doppelbrechung. See Double refraction Doppelintegrale. See Integrals, double Dörzbacher, Julius. See Koch, Julius Dosch family, 377 Double refraction (Doppelbrechung), 8 Drazic, Ruzica, 244, 245n Dreileitersystem. See Electrical circuits, three- wire system Drude, Paul (1863-1906), 213, 267n, 305n, 326 correspondence with AE, 303, 306, 308, 310 electrodynamics of moving bodies, AE plans to study, 225, 330 electron theory