References are collected under the appropriate English heading. Certain institutions, orga- nizations, and concepts that have no standard English translation are listed under their for- eign designation (with cross-references from an English translation). For the meaning of abbreviations, see the List of Abbreviations. INDEX Aardenne, Gijsbert W. van (1888–1983), Tatiana Ehrenfest engaged to, 365 Aberration AE on, 76, 196–197 change with altitude, not observed, 73 Emden on, 196 Lenard on, 196 Miller on, 76 Sommerfeld on, 196 stellar, 45, 73, 174 Stokes-Planck theory of, 76, Thirring on, 196 Abraham, Henri (1868–1944), 107 Acceleration, 501–502 Afanassjewa, Catharina (1854–?), 135, 355, 365, 441 Alexander, Franz (1891–1964), 57 American Jewish Physicians’ Committee, 202, 213, 311 meeting with BOGHU and F. War- burg, AE proposes, 225 Amira, Binyamin, 203, 226, 329 salary of, AE on, 203, 226 Analogy between electromagnetic field and analytic functions, Rainich on, 311 between light quanta and molecules, 445 between quantum gas and radiation-filled space, 144–145 between solid and radiation-filled cavity, Heisenberg on, 139 between space time and a minimum surface, 311 between zero temperature and infinite pressure, 18 Annalen der Physik, 317, 328, 459 Anrooy, Peter van (1879–1954), 354 Ansbacher, Julie (1845–1933), AE congratulates, 26 Anschütz & Co., 61, 72, 75, 87, 127, 368–369 legal dispute with Gesellschaft für nautische Instrumente, 219–220 Anschütz-Kaempfe, Hermann (1872–1931), 21, 22, 61, 68, 72, 81, 87, 127, 367, 373, 380, 382 AE misses, 56 on AE’s apartment and boat in Kiel, 277 Einstein, Hans Albert anxious about, 157 discusses salary with, 87 and Frieda Knecht’s visit, 131–132 on isolation from society of, 133–134 likes, 157 marriage of on AE’s opposition to, 277 on preventing, 102, 115, 133–134 AE on, 118 fall from horse, 277 Knecht, Frieda, calls psychopath, 132 Langevin, cooperates with in ultrasound scan- ning of seabed, AE on, 380 loses patent lawsuit, AE on, 57 Aphorisms, 25 on the Jewish people, 420 on the past, 189 on philologists, 189 on scholars, 141 on superficiality, 420 Appeal against fascism, AE signs, 464–465 Appeal for freedom of arts, AE signs, 93–94 Appeal for reconciliation of nations, AE signs, 241