I N D E X 3 6 1
ing ill parents in Novi Sad, 140, 142; reasons
for not allowing sons to visit Germany, 106;
rejects AE’s plan to have Hans Albert board
with Wintelers, 92; requests direct contact
with AE, 91, 92; tubercular, 46; Varic;ak,
good relationship with, 12; wishes to meet
AE, 74
Eisenach, AE and Elsa Einstein visits at, 18
Eisenhart, Luther (1876–1965), 311
Elasticity theory: 176; relativistic, 149
Electrodynamics, and time-reversal invariance, 31
Electron: AE on influence of magnetic field on,
6; and gravitational field, 37; and magnetism,
188; and origin of paramagnetism, 15; bound,
Fokker’s theory of, 185; cohesive forces in,
232; elementary charge of, 185; existence
and stability of, 237; existence of “subelec-
trons,” 184; inertial mass of, 178; Lorentz-
contracted, 217; no radiation of rotating elec-
tron, 341; structure in atom of, 188; theory of
as topic of 1921 Solvay meeting, 188; Zang-
ger on, 326
Elsa, Countess von Schweinitz und Krain, ex-
presses sympathy for AE, 251–252
Energy, in classical mechanics, 38
Engstlen Alp, 100
Enriques, Federigo (1871–1946), 174
Ensingen, 59, 61, 63, 65, 66, 67, 68, 69, 72. See
also Benzingen
Entropy: 109; of solutions, 350
Eötvös, Roland von (1848–1918), 105
Eötvös’s law, AE on, 9
Epstein, Paul (1883–1966): 176, 179, 209, 328;
as candidate for position at University of
Hamburg, AE on, 345; as possible successor
to Born, recommended by AE, 220, disre-
garded, 225; invited to University of Leyden,
179; fails to get professorship at University of
Zurich, 177; lectures on relativity to psychia-
trists, 177; on Edith Einstein dissertation,
176–177
Ernst, Otto (1862–1929), 170
Erzberger, Matthias (1875–1921), 131
Estorff, von, 333
Ether: and absolute space, 186, 202; De Sitter on,
302; Leyden lecture, 152, 340; AE on Stokes-
Planck ether, 149
ETH. See Swiss Federal Institute of Technology
Evershed, John (1864–1956): 153–155; solar ob-
servation of redshift during daytime, 239
Ewald, Peter P. (1888–1985), 288
Fabre, Lucien (1889–1952): 163; requests AE to
check his popular manuscript on relativity,
163–164
Farrow, Ernest Pickworth (1891–1956), 341
Fechheimer, Hedwig, friendship of with Elsa
Einstein, 72
Feldkeller, Paul (1889–1972), 162
Ferromagnetism, 230, 255
Filzbach, 103, 115
Fischer, Emil (1852–1919), signs Appeal of 30
June (Harnack-Fischer), 59
Flamm, Ludwig (1885–1964): 200; as candidate
for chair of theoretical physics at University
of Hamburg, AE on, 345
Fleischer, Richard (1849–1937), 219
Fleischmann, Helen (?–1919), 125
Fließ, Bernhard, 162
Fokker, Adriaan (1887–1972): 185, 298; con-
gratulates AE for membership in Dutch
Academy, 178; on geodetic precession, 301;
on need of experimental proof of time dila-
tion, 178–179
Food package for AE: from Maja, 104, 116; from
Zangger, 42, 44–45, 57
Food supply. See Germany, Switzerland
Förster, Wilhelm (1832–1921), 76
Foucault pendulum, 186
France, Anatole (1844–1924), 98, 104
Franck, James (1882–1964), 208, 255
Francois, ?, on campaign against AE, 270
Frank, Philipp (1884–1966): 299; paper on Mach
praised by AE, 41
Fraunhofer lines, 153
Freundlich, Erwin (1885–1964): 140, 144, 283;
book on relativity of, Zangger on, 326; on
density of star clusters, 331–333; on terrestri-
al light source for solar redshift measure-
ments, 232; paper of on redshift, 140; plans
attending As If conference, 171; report of to
Haenisch, 175
Fricke, Robert (1861–1928): organizes session
on relativity at the GDNÄ Bad Nauheim
meeting, 172, 189; invites Laue, Hilbert,
Sommerfeld, Weyl, and Born to relativity
session of GDNÄ Bad Nauheim meeting,
172; solicits lecture from AE to GDNÄ Bad