Sceptic-Ratio. Эпистолярное наследие Эйнштейна периода 1895

Феномен Эйнштейна

Эпистолярное наследие Эйнштейна периода 1895 – 1920 гг.

Взято из “The Collected Papers of Albert Einstein” VOLUME 11 “Cumulative Index, Bibliography, List of Correspondence, Chronology, and Errata to Volumes 1-10” compiled by A. J. Kox, Tilman Sauer, Diana Kormos Buchwald, Rudy Hirschmann, Osik Moses, Benjamin Aronin, and Jennifer Stolper (2009), pp. 137 – 174.

In this chronological list of correspondence, the volume and document numbers follow each name. Documents abstracted in the calendars are listed in the Alphabetical List of Texts in this volume.

1895
Summer. To Caesar Koch, 1, 6

1896
21 Apr. To Marie Winteler, with a postscript by Pauline Einstein, 1, 18
7 Sep. To the Department of Education, Canton of Aargau, 1, 20
4-25 Nov. From Marie Winteler, 1, 29
30 Nov. From Marie Winteler, 1, 30

1897
May?. To Pauline Winteler, 1, 34
21 May. To Pauline Winteler, 5: Vol. 1, 34a
7 Jun. To Pauline Winteler, 1, 35
after 20 Oct. From Mileva Maric, 1, 36

1898
?. To Maja Einstein, 1, 38
2 Jan. To Mileva Maric [envelope only], 1
13 Jan. To Maja Einstein, 8: Vol. 5, C
16 Feb. To Mileva Maric, 1, 39
16 Apr-8 Nov To Mileva Maric, 1, 40 after 16 Apr To Mileva Maric, 1, 41
after 28 Nov To Mileva Maric, 1, 43

1899
after Feb. To Maja Einstein, 1, 44
13 or 20 Mar To Mileva Maric, 1, 45
29 Apr. To Rosa Winteler, 1, 46
18 May. To Rosa Winteler, 1, 47
28 Jul. To Julia Niggli, 1, 48
Aug. To Rosa Winteler, 5: Vol. 1, 48a
early Aug. To Mileva Maric, 1, 50
6? Aug. To Julia Niggli, 1, 51
10? Aug. To Mileva Maric, 1, 52
after 10 Aug-before 10 Sep From Mileva Maric, 1, 53
10. Sep. To Mileva Maric, 1, 54
11. Sep. To Julia Niggli, 1, 55
11 Sep. To Pauline Winteler, 1, 56
28? Sep. To Mileva Maric, 1, 57
10. Oct. To Mileva Maric, 1, 58
19 Oct. To the Swiss Federal Council, 1, 60

1900
?. From Mileva Maric, 1, 61
28 Feb. To the Swiss Department of Foreign Affairs, 1, 62
26 Jun. To the Zurich City Council, 1, 65
29? Jul. To Mileva Maric, 1, 68
1 Aug. To Mileva Maric, 1, 69
6 Aug. To Mileva Maric, 1, 70
9? Aug. To Mileva Maric, 1, 71
14? Aug. To Mileva Maric, 1, 72
20. Aug. To Mileva Maric, 1, 73
30. Aug or 6 Sep To Mileva Maric, 1, 74
13? Sep. To Mileva Maric, 1, 75
19 Sep. To Mileva Maric, 1, 76
23 Sep. To Adolf Hurwitz, 1, 77
26 Sep. To Adolf Hurwitz, 1, 78
3 Oct. To Mileva Maric, 1, 79
11 Oct. To Helene Savic [Kaufler], 1, 81
11 Dec. Mileva Maric to Helene Savic, with postscript by Einstein, 1, 83
20 Dec. To Helene Savic, 1, 86

1901
8 Jan-19 Mar Mileva Maric to Helene Savic with a postscript by Einstein, 1, 87
9 Mar. To Otto Weiner, 1, 90
19 Mar. To Wilhelm Ostwald, 1, 92
23 Mar. To Mileva Maric, 1, 93
27 Mar. To Mileva Maric, 1, 94
3. Apr. To Wilhelm Ostwald, 1, 95
4. Apr. To Mileva Maric, 1, 96
10. Apr. To Mileva Maric, 1, 97
12 Apr. To Heike Kamerlingh Onnes, 1, 98
12 Apr. To Carl Paalzow, 5: Vol. 1, 98a
14. Apr. To Marcel Grossmann, 1, 100
15. Apr. To Mileva Maric, 1, 101
30. Apr. To Mileva Maric , 1, 102
2. May. From Mileva Maric 1, 103
3. May. To Alfred Stern, 1, 104
3 May. From Mileva Maric , 1, 105
9 May. To Mileva Maric, 1, 106
2d half of May? To Mileva Marie, 1, 107
2d half of May? From Mileva Marie, 1, 108
2d half of May? To Mileva Marie, 1, 110
28? May To Mileva Maric, 1,111
4? Jun. To Mileva Maric, 1, 112
3 Jul. To the Director’s Office, Technikum Burgdorf, 1, 113
7? Jul. To Mileva Maric, 1, 114
8 Jul. To Jost Winteler, 1, 115
ca. 8 Jul. From Mileva Maric , 1, 116
13 Jul. To the Department of Education, Canton of Bern, 1, 117
16 Jul. From the Department of Internal Affairs, Canton of Bern, 1, 118
22? Jul. To Mileva Maric, 1, 119
27 Jul. To Pauline Einstein, 8: Vol. 5, C
31 Jul. From the Department of Internal Affairs, Canton of Bern, 1, 120
31? Jul. From Mileva Maric , 1, 121
6? Sep. To Marcel Grossmann, 1, 122
early Nov. From Mileva Maric , 1, 123
13 Nov. From Mileva Maric, 1, 124
28 Nov. To Mileva Maric, 1, 126
12 Dec. To Mileva Maric, 1, 127
17. Dec. To Mileva Maric, 1, 128
18. Dec. To the Swiss Patent Office, 1, 129
19. Dec. To Mileva Maric, 1, 130
20. 28 Dec. To Mileva Maric, 1, 131

1902
4 Feb. To Conrad Habicht, 1, 133
4 Feb. To Mileva Maric, 1, 134
8? Feb. To Mileva Maric, 1, 136
17? Feb. To Mileva Maric, 1, 137
Apr?. To Conrad Habicht, 1, 139
19 Jun. From the Swiss Department of Justice, 1, 141
19 Jun. From the Swiss Patent Office, 1, 142
28 Jun or later To Mileva Maric, 5, 1
15 Aug-3 Oct To Hans Wohlwend, 5, 2

1903
22? Jan. To Michele Besso, 5, 5
7-11 Feb. From Michele Besso, 5, 6
17 Mar. To Michele Besso, 5, 7
ca. 20 Mar. To Helene Savic, 5, 8
22 Mar. From Emma Ehrat-Ühlinger, 5, 9
last week of Mar To Emma Ehrat-Ühlinger, 5,
10 last week of Mar To Jakob Ehrat, 5, 11
27 Aug. From Mileva Einstein-Maric , 5, 12
19? Sep. To Mileva Einstein-Maric, 5, 13
3 Oct. To Conrad Habicht, 5, 14
30 Nov. To Conrad Habicht, 5, 15

1904
20. Feb. To Conrad Habicht, 5, 16
6? Apr. To Marcel Grossmann, 5, 17
15 Apr. To Conrad Habicht, 5, 18
15 May. To Helene and Milivoj Savic, 5, 19
25 Jul. To Mileva Einstein-Maric, 5, 20
1 Aug. To Conrad Habicht, 5, 21
6 Aug. To Conrad Habicht, 5, 22
6 Aug. To Conrad Habicht, 5, 23
20 Sep. From the Swiss Patent Office, 5, 24

1905
6 Mar. To Conrad Habicht, 5, 25
6 Mar. To Conrad Habicht, 5, 26
18 or 25 May To Conrad Habicht, 5, 27
30 Jun–22 Sep To Conrad Habicht, 5, 28
20 Jul. To Rudolf Martin, 5, 29
20 Jul–summer 1915 To Conrad Habicht, 5, 30
16 Nov. To Philipp Lenard, 5, 32

1906
7 Jan. From Josef Zametzer, 5, 33
13 Mar. From the Swiss Patent Office, 5, 34
23 Apr. To the Bern Municipal Gas and Wa t e r Wo r k s , 5, 35
27 Apr. To Maurice Solovine, 5, 36
2 Jun. From Max Laue, 5, 37
6 Jun. To the Bern Municipal Gas and Water Wo rks , 5, 38
27 Jul. To Conrad Habicht, 5, 39
18 Sep. From Wilhelm Röntgen, 5, 40
3 Nov. To Jost Winteler, 5, 41
Dec?. To Helene and Milivoj Savic, 5, 42

1907
5 Jan–11 May To Alfred Schnauder, 5, 43
7 Feb. To Jost Winteler, 5, 44
13 Apr. To Johannes Stark, 5, 45
17 Jun. To the Department of Education, Canton of Bern, 5, 46
6 Jul. From Max Planck, 5, 47
15 Jul. To Conrad and Paul Habicht, 5, 48
23 Jul. To Wilhelm Wien, 5, 49
25 Jul. To Wilhelm Wien, 5, 50
29 Jul. To Wilhelm Wien, 5, 51
7 Aug. To Wilhelm Wien, 5, 52
11 Aug. To Wilhelm Wien, 5, 53
16 Aug. To Paul and Conrad Habicht, 5, 54
26 Aug. To Wilhelm Wien, 5, 55
2 Sep. To Conrad and Paul Habicht, 5, 56
4 Sep. From Max Laue, 5, 57
25 Sep. To Johannes Stark, 5, 58
3 Oct. From Teubner publishing house, 5, 59
4 Oct. From Johannes Stark, 5, 60
7 Oct. To Johannes Stark, 5, 61
9 Oct. From Hermann Minkowski, 5, 62
1 Nov. To Johannes Stark, 5, 63
9 Nov. From Max Planck, 5, 64
15 Nov. From Richard Lorenz, 5, 65
7 Dec. To Johannes Stark, 5, 66
20 Dec. To Rudolf Ladenburg, 5, 68
24 Dec. To Conrad Habicht, 5, 69
27 Dec. From Max Laue, 5, 70

1908
3 Jan. To Marcel Grossmann, 5, 71
5 Jan. To Arnold Sommerfeld, 5, 72
14 Jan. To Arnold Sommerfeld, 5, 73
mid-Jan. From Adolf Gasser, 5, 74
16 Jan. From Jakob Bosshart, 5, 75
20 Jan. To the Council of Education, Canton of Zurich, 5, 76
27. Jan. From Jakob Laub, 5, 77
28. Jan. From Alfred Kleiner, 5, 78
2 Feb. From Jakob Laub, 5, 79
8 Feb. From Alfred Kleiner, 5, 80
11 Feb. To Paul Gruner, 5, 81
11. Feb. From Johannes Stark, 5, 82
12. Feb. From Emil Bose, 5, 83
14 Feb. To Conrad Habicht, 5, 84
17 Feb. To Johannes Stark, 5, 85
19 Feb. From Paul Habicht, 5, 86
19 Feb. From Johannes Stark, 5, 87
22 Feb. To Johannes Stark, 5, 88
28. Feb. From Albert Gobat, 5, 89
29. Feb. To Johannes Stark, 5, 90
1 Mar. From Jakob Laub, 5, 91
9 Mar. From Adolf Gasser, 5, 92
17 Mar. From Paul Habicht, 5, 93
30. Mar. From Joseph Kowalski, 5, 94
4 Apr. From Paul Habicht, 5, 95
17 Apr. To Mileva Einstein-Maric, 5, 96
12 May. From Karl Jaberg, 5, 97
17 May. From Heinrich Burkhardt, 5, 98
17 May. From Paul Habicht, 5, 99
17. May. From Aurel Stodola, 5, 100
18. May. From Jakob Laub, 5, 101
19. May. From Jakob Laub, 5, 102
30. May. From Jakob Laub, 5, 103
Jun. From Paul Habicht, 5, 104
11 Jun. To Marian von Smoluchowski, 5, 105
13 Jun. From Aurel Stodola, 5, 106
23 Jun. From Lucien Chavan, 5, 107
4 Jul. From Paul Habicht, 5, 108
6 Jul. To August Hagenbach, 5, 109
9 Jul. From August Hagenbach, 5, 110
14 Jul. To August Hagenbach, 5, 111
27 Jul. From Frau Ruprecht, 5, 112
30 Jul. To Jakob Laub, 5, 113
13 Aug. To Lucien and Jeanne Chavan, 5, 114
15 Aug. To Maurice Solovine, 5, 115
18 Aug. From Maurice Solovine, 5, 116
7. Sep. From Alfred Bucherer, 5, 117
8. Sep. From Max Planck, 5, 118
9. Sep. From Alfred Bucherer, 5, 119
10. Sep. From Alfred Bucherer, 5, 120
24 Sep. From the Rudolf Wyss Furniture Store, 5, 121
12 Oct. From Paul Habicht, 5, 122
2d half of Oct From Adolf Gasser, 5, 123
22 Oct. From Paul Habicht, 5, 124
after 1 Nov. To Jakob Laub, 5, 125
2 Nov. From Hirzel publishing house, 5, 126
9 Nov. From Paul Gruner, 5, 127
26 Nov. From Alfred Bucherer, 5, 128
2. Dec. To Johannes Stark, 5, 129
3. Dec. To Albert Gockel, 5, 130
3 Dec. To Maurice Solovine, 5, 131
14 Dec. To Johannes Stark, 5, 132

1909

January
15. From Arthur Schoenflies, 5, 133
18. From Paul Habicht, 5, 134
19. From Alfred Schweitzer, 5, 135
19. From Wilhelm Wien, 5, 136

February
5. From Dmitry Mirimanoff, 8: Vol. 5, 136a
9. To Dmitry Mirimanoff, 8: Vol. 5, 136b
12. From Dmitry Mirimanoff, 5, 137
12. From Aurel Stodola, 5, 138
15. To Jakob Ehrat and Emma Ehrat-Ühlinger, 5, 139
25. To Otto Stoll, 5, 140

March
3. To Lucien Chavan, 5, 141
18. To Maurice Solovine, 5, 142
20. To Jakob Laub, 5, 143
25?. To Albert Gockel, 5, 144
25. From Josef Weiß, 5, 145
30. To Hendrik A. Lorentz, 5, 146

April
6. To Johannes Stark, 5, 147
8. From Johannes Stark, 5, 148
13. To Hendrik A. Lorentz, 5, 149
15. To Conrad Habicht, 5, 150
28. To Conrad Habicht, 5, 151

May
2. From Ayao Kuwaki, 5, 152
6. From Hendrik A. Lorentz, 5, 153
12. To Anna Meyer-Schmid, 5, 154
12. To Fritz Reiche, 5, 155
13. From Wilhelm Fiedler, 5, 156
14. To Alfred Stern, 5, 157
16. To Jakob Ehrat, 5, 158
16. From Jakob Laub, 5, 159
17. To Jakob Laub, 5, 160
19. To Jakob Laub, 5, 161
19. To Vladimir Varic;ak, 10: Vol. 5, 161a
20. From George Searle, 5, 162
23. To Hendrik A. Lorentz, 5, 163
28. From Lucien Chavan, 5, 164

June
5. From Philipp Lenard, 5, 165
7. To Georg Meyer, 5, 166
12. To Friedrich Adler, 5, 167
14. To Eilhard Wiedemann, 5, 168

July
6. To the Swiss Department of Justice, 5, 169
9. To Lucien and Jeanne Chavan-Perrin, 5, 170
17. From Paul Tinguely, 5, 171
31. To Johannes Stark, 5, 172

August
3. To the Department of Education, Canton of Bern, 5, 173
9. To Ernst Mach, 5, 174
17. To Ernst Mach, 5, 175
28. To Edgar Meyer, 5, 176

September
3. To Conrad Habicht, 5, 177
28. To Edgar Meyer, 5, 178
29. To Arnold Sommerfeld, 5, 179

October
19. To Lucien Chavan, 5, 180
after 22. To Adolf Hurwitz, 5, 181
29. To Edgar Meyer, 5, 182

November
Nov-Feb 1910 To Helene Savic, 5, 183
1. To the Department of Education, Canton of Zurich, 5, 184
5. To Conrad Habicht, 5, 185
11. To Jean Perrin, 5, 186
17. To Michele Besso, 5, 187
18. To Edgar Meyer, 5, 188

December
14. To Conrad Habicht, 5, 190
14. To Conrad Habicht, 5, 191
17. To Conrad Habicht, 5, 192
19. To Lucien Chavan, 5, 193
28. From Milos Maric, 5, 194
31. To Michele Besso, 5, 195
31. To Jakob Laub, 5, 196

1910

January
19. To Arnold Sommerfeld, 5, 197

February
15. To Vladimir Varicak, 10: Vol. 5, 197a
28. To Vladimir Varicak, 10: Vol. 5, 197b

March
4. To Conrad Habicht, 5, 198
16. To Jakob Laub, 5, 199
24. To Lucien Chavan, 5, 200
24. To Lucien Chavan, 5, 201
31. To Conrad Habicht, 5, 202

April
3. From Vladimir Varicak, 10: Vol. 5, C
5. To Vladimir Varicak, 10: Vol. 5, 202a
8. From Vladimir Varicak, 10: Vol. 5, C
10. From Vladimir Varicak, 10: Vol. 5, C
11. To Vladimir Varicak, 10: Vol. 5, 202b
14. From Vladimir Varicak, 10: Vol. 5, C
15. To Lucien Chavan, 5, 203
23. To Vladimir Varicak, 10: Vol. 5, 203a
28. To Pauline Einstein, 5, 204

May
6. To Lucien Chavan, 5, 205
11. To Edgar Meyer, 5, 206
14. To Lucien Chavan, 5, 207
17. To Lucien Chavan, 5, 208

June
21. To Ludwig Hopf, 5, 209

July
?. To Arnold Sommerfeld, 5, 211
1. From Geza Müller, 5, 212
2. To Lucien Chavan, 5, 213
27. To Conrad Habicht, 5, 214
30. To Lucien and Jeanne Chavan-Perrin, 5, 215
30. To Alfred Stern, 5, 216

August
before 1. To Helene and Milivoj Savic, 5, 217
2. To Ludwig Hopf, 5, 218
11. To Conrad Habicht, 5, 219
14. To Paul Hertz, 5, 220
19. To Ludwig Hopf, 5, 221
26. To Paul Hertz, 5, 222
26. To Franz Rusch, 5, 223
27. To Jakob Laub, 5, 224

September
17. From Max Hussarek von Heinlein, 5, 225

October
7. To Wilhelm Wien, 5, 226
11. To Jakob Laub, 5, 227
25. From Springer publishing house, 5,228
26. To the Bursar’s Office, University of Zurich, 5, 229

November
1. From Emil Fischer, 5, 230
4. To Jakob Laub, 5, 231
5. To Emil Fischer, 5, 232
11. To Jakob Laub, 5, 233
15. To Jakob Laub, 5, 234
22. To Leo Graetz, 5, 235

December
1. To Otto Lehmann, 10: Vol. 5, 235a
6. To Alfred Stern, 5, 236
11. To Carl Schröter, 5, 237
15. From Count Karl von Stürgkh, 5,238
27. To Ludwig Hopf, 5, 239
27. To Edgar Meyer, 5, 240
28. To Jakob Laub, 5, 241
31. To Heike Kamerlingh Onnes, 5,242

1911

January
1. To Heinrich Zangger, 10: Vol. 5, 242a
2. To Ludwig Darmstaedter, 5, 243
12. To Jean Perrin, 5, 244
13. From Count Karl von Stürgkh, 5,245
17. To Lucien Chavan, 5, 246
20. To the Department of Education, Canton of Zurich, 5, 247
20. To Carl Schröter, 5, 248
21. To Carl Schröter, 5, 249
27. To Hendrik A. Lorentz, 5, 250
28. To the Association of Students of the Natural Sciences, University of Amsterdam, 5, 250a
29. To Emil Zürcher, 5, 251

February
9. To Friedrich Adler, 5, 252
12. From Richard Swinne, 5, 253
15. To Hendrik A. Lorentz, 5, 254
16. From Günther Beck, 5, 255
24. To Vladimir Varicak, 10: Vol. 5, 255a
26. To Edgar Meyer, 5, 256
26. To Richard Swinne, 5, 257

March
3. To Vladimir Varicak, 10: Vol. 5, 257a
6. From Vladimir Varicak, 10: Vol. 5, C
10. To Lucien and Jeanne Chavan-Perrin, 5, 258
10. To Hans Schinz, 5, 259
28. To Lucien Chavan, 5, 260

April
2. To Conrad Habicht, 5, 261
5. To Lucien Chavan, 5, 262
7. To Heinrich Zangger, 5, 263
12. To Paul Ehrenfest, 5, 264
24. To Hans Tanner, 5, 265
27. To Marcel Grossmann, 5, 266

May
13. To Michele Besso, 5, 267

June
before 1. To Heinrich Zangger, 10: Vol. 5, 267a
7. To Heinrich Zangger, 5, 268
9. From Ernest Solvay, with an invitation to the Solvay Congress, 5, 269
20. To Walther Nernst, 5, 270

July
5–6. To Lucien Chavan, 5, 271
11. To Zürcher and Furrer & Co., 5, 272
before 21. To the Eleventh Congress of Polish Physicians and Natural Scientists, 5, 273

August
2. From Alfred and Clara Stern, 5, 274
10. To Jakob Laub, 5, 275
2d half. To Michele Besso, 5, 276
20. From Willem Julius, 5, 277
24. To Willem Julius, 5, 278
24. To Heinrich Zangger, 5, 279
26. From Willem Julius, 5, 280

September
1. To Erwin Freundlich, 5, 281
before 11. From Michele Besso, 5, 282
11. To Michele Besso, 5, 283
17. From Willem Julius, 5, 284
18. From Pauline Einstein, 5, 285
20. To Heinrich Zangger, 5, 286
21. To Erwin Freundlich, 5, 287
22. To Willem Julius, 5, 288
27. From Willem Julius, 5, 289

October
4. From Mileva Einstein-Maric, 5, 290
11. From Willem Julius, 5, 292
13. To Hans Tanner, 5, 293
13. From Ludwig Hopf, 5, 294
18. To Willem Julius, 5, 295
21. To Michele Besso, 5, 296
22. To Heinrich Zangger, 5, 297
22. From Pauline Einstein, 5, 298
23. From Michele Besso, 5, 299
28. To Mileva Einstein-Maric, 5, 300
29. To Mileva Einstein-Maric, 5, 301

November
1. To Willem Julius, 5, 302
7. To Heinrich Zangger, 5, 303
15. To Willem Julius, 5, 304
15. To Heinrich Zangger, 5, 305
16. To Willem Julius, 5, 306
18. To Marcel Grossmann, 5, 307
20. To Heinrich Zangger, 5, 308
20. To Heinrich Zangger, 5, 309
20. From Willem Julius, 5, 310
22. To Willem Julius, 5, 311
22. To Ernest Solvay, 5, 312
23. To Marie Curie, 8: Vol. 5, 312a
23. To Hendrik A. Lorentz, 5, 313
25. From Willem Julius, 5, 314
27. To Marian von Smoluchowski, 5, 315

December
6. From Hendrik A. Lorentz, 5, 316
8. From Robert Gnehm, 5, 317
8. From Hendrik A. Lorentz, 5, 318
10. To Marcel Grossmann, 5, 319
12. To Hendrik A. Lorentz, 5, 320
12. From Marcel Grossmann, 5, 321
12. From Willem Julius, 5, 322
12. From Marian von Smoluchowski, 5, 323
13. To Robert Gnehm, 5, 324
13–16. To Heinrich Zangger, 5, 325
16. From Robert Gnehm, 5, 326
18. To Willem Julius, 5, 327
19. To Robert Gnehm, 5, 328
19. From Fritz Haber, 5, 329
25. To Heinrich Zangger, 5, 330
26. To Michele Besso, 5, 331
27. From Paul Habicht, 5, 332
27. From Max Laue, 5, 333
29. From Willem Julius, 5, 334

1912

January
?. To Lucien and Jeanne Chavan-Perrin, 5, 335
8. To Erwin Freundlich, 5, 336
9. From George Pegram, 5, 337
17. To Fritz Fichter-Bernoulli, 5, 338
17. To Wilhelm Wien, 5, 339
23. From Arnold Eucken, 5, 340
23. From Robert Gnehm, 5, 341
26. To Paul Ehrenfest, 5, 342
27. To Wilhelm Wien, 5, 343
27. To Heinrich Zangger, 5, 344
27. To Heinrich Zangger, 10: Vol. 5, 344
28. To Lucien Chavan, 5, 345
29. To George Pegram, 5, 346
30. From Heinrich Zangger, 5, 347
31. From Heinrich Schenk, 5, 348

February
before 1. To Heinrich Zangger, 10: Vol. 5, 349a
1. To Robert Heller, 10: Vol. 5, 349b
1. To Carl Schröter, 5, 349
1. From Richard Swinne, 5, 350
2. To Ludwig Forrer, 5, 351
2. To Alfred and Clara Stern, 5, 352
3. From Alfred Stern, with postscript by Clara Stern, 5, 353
4. To Michele Besso, 5, 354
7. From Robert Gnehm, 5, 355
9. To Conrad and Paul Habicht, 5, 356
12. To Paul Ehrenfest, 5, 357
12. To Robert Gnehm, 5, 358
13. From Hendrik A. Lorentz, 5, 359
18. To Hendrik A. Lorentz, 5, 360
19. From Robert Heller, 5, 361
19. From Emil Warburg, 5, 362
20. From Ludwig Hopf, 5, 363
after 20. To Ludwig Hopf, 5, 364
24. To Wilhelm Wien, 5, 365
before 29. To Heinrich Zangger, 5, 366
29. To Paul Ehrenfest, 5, 367

March
8. From Fritz Haber, 5, 368
10. To Paul Ehrenfest, 5, 369
10. To Marian von Smoluchowski, 5,370
11. To Wilhelm Wien, 5, 371
11. From Walter König, 5, 372
after 11. To Walter König, 5, 373
17. To Alfred and Clara Stern, 5, 374
17. To Heinrich Zangger, 10: Vol. 5, 374a
20. To Wilhelm Wien, 5, 375
23. From Walther Nernst 8: Vol. 5, 375a
24. To Marian von Smoluchowski, 5, 376
26. To Michele Besso, 5, 377
30. From David Hilbert, 5, 378
30. From Heinrich Zangger, 5, 379

April
before 3. From Paul Ehrenfest, 5, 380
3. To Alfred Kleiner, 5, 381
3. To Alfred Kleiner, 5, 382
10. To Alfred Kleiner, 5, 383
25. To Paul Ehrenfest, 5, 384
25. To Emil Warburg, 5, 385
26-10 May. To Emil Warburg, 5, 386
26. To Paul Ehrenfest, 5, 387
26. To Hans Tanner, 5, 388
30. To Elsa Löwenthal, 5, 389

May
2. To Paul Ehrenfest, 5, 390
7. To Elsa Löwenthal, 5, 391
11. To Wilhelm Wien, 5, 392
14. From Paul Ehrenfest, 5, 393
after 16. From Paul Ehrenfest, 5, 394
17. To Wilhelm Wien, 5, 395
20. To Marian von Smoluchowski, 5, 396
20. To Marian von Smoluchowski, 5, 397
20. To Heinrich Zangger, 5, 398
21. To Elsa Löwenthal, 5, 399
30. To Wilhelm Wien, 5, 401

June
1.. From Paul Habicht, 5, 402
2.. To Conrad Habicht, 5, 403
3. To Paul Ehrenfest, 5, 404
5. Alfred Stern, 5, 405
after 5. To Heinrich Zangger, 5, 406
10. To Max Laue, 5, 407
12. To Ludwig Hopf, 5, 408
before 20. To Paul Ehrenfest, 5, 409
29. To Anton Lampa?, 5, 410
29. From Paul Ehrenfest, 5, 411

July
2. From Pauline Einstein, 5, 412
10. To Wilhelm Wien, 5, 413

August
14. To Conrad Habicht, 5, 415
16. To Ludwig Hopf, 5, 416

October
4. To David Hilbert, 5, 417
4. To Ernst Zermelo, 5, 418
14. From Theodor Vetter, 5, 419
27. To Erwin Freundlich, 5, 420
29. To Arnold Sommerfeld, 5, 421

November
5. To August Hagenbach, 5, 422

December
?. To Lucien Chavan, 5, 423
after 17. To Helene Savic, 5, 424
20-24. To Paul Ehrenfest, 5, 425
22. To Otto Marx, 5, 426

1913

January
4. From Theodor Vetter, 5, 427
30. To Georg Bredig, 5, 429

March
2. To Unknown, 5, 430
2. To Unknown, 8: Vol. 5, 430
14. To Clara Stern, 5, 431
ca. 14. To Elsa Löwenthal, 5, 432
16–22 . To Maurice Solo vine, 5, 433
23. To Elsa Löwenthal, 5, 434

April
3. To Marie Curie, 5, 435
3. To Elsa Löwenthal, 5, 436
4. To Jean Perrin, 5, 437
29. To the Scientific Committee, Solvay International Institute of Physics, 5, 438

May
3 or after. To Conrad Habicht, 5, 439
14. To Vladimir Varichak, 10: Vol. 5, 439a
24. To Alexander Witting, 5, 440
28. To Paul Ehrenfest, 5, 441
29. To the Director’s Office, Technikum Winterthur, 5, 442
31. From Charles-Eugene Guye, 5,443
after 31–4 Jun To the Faculty of Sciences, University of Geneva, 5, 444

June
17. To Arthur Schidlof, 5, 446
23. To Jost Winteler, 5, 447
25. To Ernst Mach, 5, 448

July
5. To Arthur Schidlof, 5, 449
7. To Conrad Habicht, 5, 450
14?. To Elsa Löwenthal, 5, 451
19. To Elsa Löwenthal, 5, 453
20-23. To Elsa Löwenthal, 5, 454
22. To Jakob Laub, 5, 455
22. From Fritz Haber, 5, 456
23. To Leonid Mandelshtam, 5, 457
27. To Paul Hertz, 5, 458

August
3. From Ida Einstein, 5, 459
5. To Lucien and Jeanne Chavan-Perrin, 5, 460
6. To Adolf Hurwitz, 5, 461
6. To Alfred and Clara Stern, 5, 462
before 9. To Paul Langevin, 5, 463
11. To Alexander Witting, 5, 464
11?. To Elsa Löwenthal, 5, 465
after 11. To Elsa Löwenthal, 5, 466
14. To Hendrik A. Lorentz, 5, 467
mid-. To Erwin Freundlich, 5, 468
16. To Heike Kamerlingh Onnes, 5,469
16. To Hendrik A. Lorentz, 5, 470
18. To Heike Kamerlingh Onnes, 5,471
before 26. To Erwin Freundlich, 5, 472

September
7. To Conrad Habicht, 5, 473
20. To Heinrich Zangger, 5, 474

October
Oct-Dec. To Conrad and Anna Habicht-Kehlstadt, 5, 475
10. To Elsa Löwenthal, 5, 476
14. To George Hale, 5, 477
16. To Elsa Löwenthal, 5, 478
19. To Robert Gnehm, 5, 479

November
2. To Ludwig Hopf, 5, 480
before 7. To Paul Ehrenfest, 5, 481
7. To Elsa Löwenthal, 5, 482
8. From George Hale, 5, 483
2d half. To Paul Ehrenfest, 5, 484
22 . From the Prussian Academy of Sciences, 5, 485
after 22 . To Elsa Löwenthal, 5, 486
30. To Robert Gnehm, 5, 487

December
before 2. To Elsa Löwenthal, 5, 488
after 2. To Elsa Löwenthal, 5, 489
7. To Rosa Bandi-Winteler, 5, 491
7. To Erwin Freundlich, 5, 492
7. To the Prussian Academy of Sciences, 5, 493
15. From Robert Gnehm, 5, 494
2d half. To Ernst Mach, 5, 495
21. From Pauline Einstein, 5, 496
after 21. To Elsa Löwenthal, 5, 497
27–4 Jan. To Elsa Löwenthal, 5, 498

1914

January
after 1. To Michele Besso, 5, 499
7. To Rosa Bandi-Winteler, 5, 500
7. From Jakob Ehrat, 5, 501
7. To Jakob Ehrat, 8: Vol. 5, 500a
8. To Rosa Bandi-Winteler, 5, 502
9. To Jost Winteler, 5, 503
after 9. To Rosa Bandi-Winteler, 5, 504
mid-. To Elsa Löwenthal, 5, 505
ca. 20. To Erwin Freundlich, 5, 506
ca. 20. To Heinrich Zangger, 5, 507
28. To Elsa Löwenthal, 5, 508

February
Feb. To Elsa Löwenthal, 5, 509
after 11. To Elsa Löwenthal, 5, 510

March
5. To Elsa Löwenthal, 5, 511
before 10. To Paul Ehrenfest, 5, 512
10. To Heinrich Zangger, 5, 513
ca. 10. To Michele Besso, 5, 514
19. To Paul Ehrenfest, 5, 515
20. From Michele Besso, 5, 516
22 . To Paul Ehrenfest, 5, 517
23. To Mileva Einstein-Maric, Hans Albert, and Eduard Einstein, 5, 518
27. To David Reichinstein, 5, 519

April
2. To Mileva Einstein-Maric, 8, 1
before 10. To Paul Ehrenfest, 8, 2
10. To Mileva Einstein-Maric, Hans
Albert and Eduard Einstein, 8, 3
10. or later. From Paul Ehrenfest, 8, 4
14. To Joseph Petzoldt, 8, 5
ca.14-1 Jul. From Heinrich Zangger, 10: Vol. 8, 5a
after. To Edgar Meyer, 8, C

May
4. To Adolf Hurwitz and Family, 8, 6
16. To Petr Petrovich Lazarev, 8, 7
16. From Wilhelm Waldeyer, 8, C
18. To Paul Ehrenfest, 8, 8
20. From Paul Ehrenfest, 8, 9
21. From Paul Ehrenfest, 8, 10
25. To Paul Ehrenfest, 8, 11

June
after 4. To Otto Stern, 8, 12
11. To Joseph Petzoldt, 8, 13
15. To Wilhelm Wien, 8, 14
19. From Wilhelm Wien, 8, 15
25. From Walter Schottky, 8, 16
27. To Heinrich Zangger, 10: Vol. 8, 16a

July
2. From Walther Nernst, 8, 17
7. To Max Planck, 8, 18
8. To Paul Ehrenfest, 8, 19
12. From Max Planck, 8, 20
18. To Fritz Reiche, 8, 21
ca. 18. To Mileva Einstein-Maric, 8, 23
ca. 18. To Mileva Einstein-Maric, 8, 24
20. To Robert Heller, 8, 25
26. To Elsa Einstein, 8, 26
after 26. To Elsa Einstein, 8, 27
before 30. To Elsa Einstein, 8, 28
30. To Elsa Einstein, 8, 29
30. To Elsa Einstein, 8, 30

August
3. To Elsa Einstein, 8, 31
after 3. To Elsa Einstein, 8, 32
18. To Mileva Einstein-Maric, 8, 33
19. To Paul Ehrenfest, 8, 34
24. To Heinrich Zangger, 10: Vol. 8, 34a

September
10. To Hans Albert Einstein, 8, 35
15. To Mileva Einstein-Maric, 8, 36

October
30. To Adolf Schmidt, 8, 37
31. From Adolf Schmidt, 8, 38

December
beginning. To Paul Ehrenfest, 8, 39
2. To Paul Habicht, 8, C
12. To Mileva Einstein-Maric, 8, 40
13. To Michael Polanyi, 8, 41
after 27. To Heinrich Zangger, 10: Vol. 8, 41a
30 Dec. To Michael Polanyi, 8, 42

1915

January
1-23. From Hendrik A. Lorentz, 8, 43
2. To Edgar Meyer, 8, 44
2. From Arnold Berliner, 8, C
7. To Paolo Straneo, 8, 45
11. To Heinrich Zangger, 10: Vol. 8, 45a
12. To Mileva Einstein-Maric, 8, 46
23. To Hendrik A. Lorentz, 8, 47
25. To Hans Albert Einstein, 8, 48
27. To Mileva Einstein-Maric, 8, 49
27. To Wadysaw Natanson, 8, 50
27. To Wilhelm Waldeyer, 8, 51

February
3. To Hendrik A. Lorentz, 8, 52
ca. 3. To Erwin Freundlich, 8, 53
5. To Erwin Freundlich, 8, 54
10. To Michael Polanyi, 8, 55
12. To Michele Besso, 8, 56
20. To Georg F. Nicolai, 8, 57
after 20. To Hermann Diels, 8, C
after 20. To Heinrich Morf, 8, C
23. To Hans Tanner, 8, C

March
1. To Mileva Einstein-Maric, 8, 58
1-25. To Erwin Freundlich, 8, 59
5. To Tullio Levi-Civita, 8, 60
17. To Wander de Haas, 8, 61
17. To Tullio Levi-Civita, 8, 62
19. To Erwin Freundlich, 8, 63
20. To Tullio Levi-Civita, 8, 64
22 . To Romain Rolland, 8, 65
26. To Tullio Levi-Civita, 8, 66
28. From Tullio Levi-Civita, 8, 67
28. From Romain Rolland, 8, 68

April
2. To Tullio Levi-Civita, 8, 69
2. To Georg F. Nicolai, 8, C
before 4. To Hans Albert Einstein, 8, 70
before 4. From Hans Albert Einstein, 10: Vol. 8, 69a
before 4. From Hans Albert Einstein, 10: Vol. 8, 69b
8. To Tullio Levi-Civita, 8, 71
before 10. To Geertruida de Haas-Lorentz, 8,72
ca. 10. To Heinrich Zangger, 8, 73
11. To Tullio Levi-Civita, 8, 74
14. To Tullio Levi-Civita, 8, 75
18. To Fritz Weishut, 8, 76
20. To Tullio Levi-Civita, 8, 77
21. To Tullio Levi-Civita, 8, 78
28. To Hendrik A. Lorentz, 8, 79

May
5. To Tullio Levi-Civita, 8, 80
8. To Michael Polanyi, 8, 81
ca. 10. To Wander and Geertruida de Haas, 8, 82
15. To Mileva Einstein-Maric, 8, 83
17. To Heinrich Zangger, 8, 84
18. To Landgericht I, Berlin, 8, C
27. From Max von Laue, 8, 85
28. To Heinrich Zangger, 8, 86
31. To Walter Dällenbach, 8, 87

June
11. From Helene Katz, 8, 88
18. To Michael Polanyi, 8, 89
22. From Hans Reissner, 8, 90
24. To David Hilbert, 8, 91
28. From Hans Albert Einstein, 10: Vol. 8, 91a

July
?. To Paul Habicht, 8, C
6. To Wander and Geertruida de Haas, 8, 92
6. To Michael Polanyi, 8, 93
7. To Heinrich Zangger, 8, 94
9. To Wander and Geertruida de Haas, 8, 95
15. To Arnold Sommerfeld, 8, 96
16. To Heinrich Zangger, 10: Vol. 8, 96a
19. From Heinrich Mousson, 8, 97
21. To Hendrik A. Lorentz, 8, 98
24. To Wander and Geertruida de Haas, 8, 99
24. To Heinrich Mousson, 8, 100
24–7 Aug. To Heinrich Zangger, 8, 101
27. To Theobald von Bethmann-Hollweg, 8, C

August
2. To Wander and Geertruida de Haas, 8, 102
2. To Hendrik A. Lorentz, 8, 103
7. To Wander de Haas, 8, 104
9. From Knud A. Nissen, 8, 105
10. To Wander and Geertruida de Haas, 8, 106
14. To Wander and Geertruida de Haas, 8, 107
14-4 Nov. To Paul Hertz, 8, 108
15. To Pieter Zeeman, 8, 109
16. To Wander and Geertruida de Haas, 8, 110
22. To Paul Hertz, 8, 111
23. To Paul Ehrenfest, 8, 112
24. To Wadysaw Natanson, 8, 113 24. To Hans Tanner, 8, C
29. To Hans Tanner, 8, C
30. To Elsa Einstein, 8, 114

September
3. To Elsa Einstein, 8, 115
11. To Elsa Einstein, 8, 116
13. To Elsa Einstein, 8, 117
15. To Romain Rolland, 8, 118
17. To Heinrich Mousson, 8, 119
18. To Paul Langevin, 8, C
19. To Heinrich Zangger, 8, 120
21. To Heinrich Zangger, 8, 121
23. To Hendrik A. Lorentz, 8, 122
24. To Heinrich Zangger, 10: Vol. 8, 122a
30. To Erwin Freundlich, 8, 123
ca. 30. From Michele Besso, 8, C

October
after 1. To Otto Naumann, 8, 124
4. To Heinrich Zangger, 10: Vol. 8, 124a
before 8. To Paul Hertz, 8, 125
before 8. To Paul Hertz, 8, 126
8. From Paul Hertz, 8, 127
9. To Paul Hertz, 8, 128
12. To Hendrik A. Lorentz, 8, 129
15. To Heinrich Zangger, 8, 130
22. To Walther Schücking, 8, 131
after 23. To Berliner Goethebund, 8, 132
ca. 30. From Michele Besso, 8, 133

November
4. To Werner Bloch, 10: Vol. 8, C
4. To Hans Albert Einstein, 8, 134
5. From Mileva Einstein-Maric , 8, 135
7. To David Hilbert, 8, 136
7. From Max Planck, 8, 137
11. To Berliner Goethebund, 8, 138
12. To David Hilbert, 8, 139
13. From David Hilbert, 8, 140
before 15. To Wander and Geertruida de Haas, 8, 141
15. To Hans Albert Einstein, 8, 142
15. To Mileva Einstein-Maric, 8, 143
15. To David Hilbert, 8, 144
15. To Heinrich Zangger, 10: Vol. 8, 144a
15. From Max Planck, 8, 145
16. To Berliner Goethebund, 8, 146
17. To Michele Besso, 8, 147
18. To David Hilbert, 8, 148
19. From David Hilbert, 8, 149
23. To Hans Albert Einstein, 8, 150
24. To Erwin Freundlich, 8, 151
26. To Heinrich Zangger, 8, 152
28. To Arnold Sommerfeld, 8, 153
29. From Michele Besso, 8, 154
before 30. From Hans Albert Einstein, 10: Vol. 8, 154a
30. To Michele Besso, 8, 155
30. To Hans Albert Einstein, 8, 156
30. To Erwin Freundlich, 8, 157
after 30. From Michele Besso, 8, 158

December
1. To Mileva Einstein-Maric, 8, 159
before 4. To Heinrich Zangger, 10: Vol. 8, 159a
7. To Otto Naumann, 8, 160
9. To Arnold Sommerfeld, 8, 161
9. To Heinrich Zangger, 10: Vol. 8, 161a
10. To Michele Besso, 8, 162
10. To Mileva Einstein-Maric, 8, 163
11. From Michele Besso, 8, 164
14. To Moritz Schlick, 8, 165
18. To Hans Albert Einstein, 8, 166
20. To David Hilbert, 8, 167
21. To Michele Besso, 8, 168
22 . From Karl Schwarzschild, 8, 169
23. To Hans Albert Einstein, 8, 170
23. To Royal Society of Sciences in Gottingen, 8, 171
25. To Hans Albert Einstein, 8, 172
26. To Paul Ehrenfest, 8, 173
27. To Prussian Ministry of Education, 8, C
29. To Paul Ehrenfest, 8, 174
29. To Wadysaw Natanson, 8, 175
29. To Karl Schwarzschild, 8, 176
29. To Minna Stern, 8, C

1916

January
1. To Hendrik A. Lorentz, 8, 177
3. To Michele Besso, 8, 178
3. To Paul Ehrenfest, 8, 179
5. To Paul Ehrenfest, 8, 180
9. To Karl Schwarzschild, 8, 181
17. To Paul Ehrenfest, 8, 182
17. To Hendrik A. Lorentz, 8, 183
19. To Hendrik A. Lorentz, 8, 184
20. To Otto von Schjerning, 8, C
24. or later. To Paul Ehrenfest, 8, 185
26. To Wilhelm Wirtinger, 10: Vol. 8, 185a

February
2. To Arnold Sommerfeld, 8, 186
6. To Mileva Einstein-Maric, 8, 187
6. From Karl Schwarzschild, 8, 188
8. To Arnold Sommerfeld, 8, 189
13. To Hermann Struve, 8, 190
15. To Otto Stern, 8, 191
after 15. To Otto Stern, 8, 192
18. To David Hilbert, 8, 193
19. To Karl Schwarzschild, 8, 194
27. To Max Born, 8, 195
28. To Wilhelm Wien, 8, 196

March
1. To Heinrich Zangger, 10: Vol. 8, 196a
3. To Hans Albert Einstein, 8, 197
8. From A. Braumüller, 8, C
10. To Otto Stern, 8, 198
11. To Hans Albert Einstein, 8, 199
12. To Mileva Einstein-Maric, 8, 200
13. From Otto Stern, 8, 201
16. To Hans Albert Einstein, 8, 202
18. To Wilhelm Wien, 8, 203
25. From Wilhelm Foerster, 8, 204
27. To Otto Stern, 8, 205
30. To Hans Albert Einstein, 8, 206
30. To David Hilbert, 8, 207

April
1. To Mileva Einstein-Maric, 8, 208
6. To Michele Besso, 8, 209
6. To Elsa Einstein, 10: Vol. 8, 209a
6. To Hans Albert and Eduard Einstein, 8, 210
8. To Elsa Einstein, 10: Vol. 8, 210a
8. To Mileva Einstein-Maric, 8, 211
10. To Elsa Einstein, 10: Vol. 8, 211a
12. To Elsa Einstein, 8, 212
15. To Elsa Einstein, 8, 213
15. To Hans Albert Einstein, 8, 214
21. To Michele Besso, 8, 215
21. To Elsa Einstein, 8, 216
22. To Michele Besso, 8, 217
29. To Paul Ehrenfest, 8, 218

May
14. To Michele Besso, 8, 219
24. To Paul Ehrenfest, 8, 220
25. To David Hilbert, 8, 221
27. From David Hilbert, 8, 222
30. To David Hilbert, 8, 223

June
?. From Friedrich Kraus, 8, C
2. To David Hilbert, 8, 224
6. From Hendrik A. Lorentz, 8, 225
17. To Hendrik A. Lorentz, 8, 226
22. To Willem de Sitter, 8, 227
27. From Theophile de Donder, 8, 228
28. From Michele Besso, 8, 229
30. To Theophile de Donder, 8, 230

July
4. From Theophile de Donder, 8, 231
8. To Theophile de Donder, 8, 232
11. To Heinrich Zangger, 10: Vol. 8, 232a
14. To Michele Besso, 8, 233
14. From Theophile de Donder, 8, 234
15. To Willem de Sitter, 8, 235
17. To Theophile de Donder, 8, 236
17. From Michele Besso, 8, 237
19. To Heinrich Zangger, 10: Vol. 8, 237a
21. To Michele Besso, 8, 238
21. To Michele Besso, 8, 239
23. To Theophile de Donder, 8, 240
25. To Hans Albert Einstein, 8, 241
25. To Heinrich Zangger, 8, 242
25. To Emil Zürcher Jr. and Johanna Zürcher-Siebel, 10: Vol. 8, 242a
27. From Willem de Sitter, 8, 243
27. From Willem de Sitter, 8, 244
31. To Michele Besso, 8, 245

August
3. To Arnold Sommerfeld, 8, 246
3. From Gunnar Nordström, 8, 247
3. To Heinrich Zangger, 10: Vol. 8, 247a
6. From Theophile de Donder, 8, 248
8. From Theophile de Donder, 8, 249
11. To Michele Besso, 8, 250
18. To Heinrich Zangger, 10: Vol. 8, 250a
24. To Michele Besso, 8, 251
24. To Heinrich Zangger, 8, 252
25. To Paul Ehrenfest, 8, 253

September
6. To Michele Besso, 8, 254
6. To Constantin Caratheodory, 8, 255
6. To Paul Ehrenfest, 8, 256
8. To Hedwig Born, 8, 257
8. To Helene Savic, 8, 258
14. To Paul Ehrenfest, 8, 259
26. To Michele Besso, 8, 260
26. To Hans Albert Einstein, 8, 261
26. To Heinrich Zangger, 10: Vol. 8, 261a
28. To Elsa Einstein, 10: Vol. 8, 261b
30. To Elsa Einstein, 10: Vol. 8, 261c

October
3. To Wander and Geertruida de Haas, 8, 262
5. To Elsa Einstein, 10: Vol. 8, 262a
7. To Elsa Einstein, 10: Vol. 8, 262b
13. To Hans Albert Einstein, 8, 263
13. To Paul Bernays, 10: Vol. 8, 263a
13. To Heinrich Zangger, 10: Vol. 8, 263b
14. To Werner Weisbach, 8, 264
15. To Carl Kormann, 8, 265
16. From Carl Kormann, 8, 266
17. To Wilhelm Wien, 8, 267
18. To Paul and Tatiana Ehrenfest, 8, 268
24. To Paul Ehrenfest, 8, 269
24. From Theodor Lewald, 8, C
25. To Heinrich Zangger, 10: Vol. 8, 269a
31. To Michele Besso, 8, 270
31–13 Dec. From Heinrich Zangger, 10: Vol. 8, 270a
after 31. To Hans Albert Einstein, 8, 271

November
1. From Willem de Sitter, 8, 272
4. To Willem de Sitter, 8, 273
6. To Wilhelm Ostwald, 8, 274
7. To Paul Ehrenfest, 8, 275
13. To Hendrik A. Lorentz, 8, 276
16. To Heinrich Zangger, 10: Vol. 8, 276a
17. To Paul Ehrenfest, 8, 277
23. To Hermann Weyl, 8, 278
26. To Hans Albert Einstein, 8, 279
before 26. From Hans Albert Einstein, 10: Vol. 8, 278a
after 26. From Hans Albert Einstein, 10: Vol. 8, 279a
29. To Wilhelm Röntgen, 8, 280
30. From Gunnar Nordström, 8, 281

December
4. To Paul Ehrenfest, 8, 282
5. From Michele Besso, 8, 283
5. To Ejnar Hertzsprung, 10: Vol. 8, 282a
after 6. To Michele Besso, 10: Vol. 8, 283
10. To Constantin Caratheodory, 8, 28
16. From Constantin Caratheodory, 8,285

1917
?. From Victor Adler, 8, C

January
1. From Wilhelm Lenz, 8, C
3. To Hermann Weyl, 8, 286
8. To Hans Albert Einstein, 8, 287
8. To Heinrich Zangger, 10: Vol. 8, 287a
16. To Heinrich Zangger, 10: Vol. 8, 287b
16. From Theobald von Bethmann-Hollweg, 8, C
18. From Alexander Moszkowski, 8,288
ca. 22. To Georg F. Nicolai, 8, 289
23. To Willem de Sitter, 8, 290
28. To Wadysaw Natanson, 8, 291

February
1. From Alexander Moszkowski, 8,292
1. To Heinrich Zangger, 10: Vol. 8, 291a
2. To Willem de Sitter, 8, 293
4. To Paul Ehrenfest, 8, 294
4. From Max Planck, 8, 295
4. From Moritz Schlick, 8, 296
6. To Moritz Schlick, 8, 297
13. To Heinrich Zangger, 10: Vol. 8, 297a
14. To Paul Ehrenfest, 8, 298
mid-29 Apr To Emperor Franz Josef, 10: Vol. 8, 300a
after 15. To Walter Dällenbach, 8, 299
16. To Heinrich Zangger, 10: Vol. 8, 299a
16. From Bank-Verein Filiale Prag, WIener, 8, C
18 or later. To Erwin Freundlich, 8, 300
20. To Kathia Adler, 8, 301
26. From Georg F. Nicolai, 8, 302
28. To Georg F. Nicolai, 8, 303
after 28. To Georg F. Nicolai, 8, 304

March
1. To Maja Winteler-Einstein and Paul Winteler, 8, C
8. To Walther Rathenau, 8, 305
9. To Michele Besso, 8, 306
9. From Friedrich Adler, 8, 307
after 9. To Michele Besso, 8, 308
before 10. To Heinrich Zangger, 10: Vol. 8, 308a
10. To Heinrich Zangger, 8, 309
after 10. To Heinrich Zangger, 8, 310
before 12. To Willem de Sitter, 8, 311
15. From Willem de Sitter, 8, 312
20. From Willem de Sitter, 8, 313
21. To Moritz Schlick, 8, 314
22. From Hendrik A. Lorentz, 8, 315
23. From Friedrich Adler, 8, 316
24. To Willem de Sitter, 8, 317
24. From Max von Laue, 8, 318
26. To Felix Klein, 8, 319

April
1-22. From Hans Albert Einstein, 10: Vol. 8, 319a
1. To Moritz Schlick, 8, 320
1. From Willem de Sitter, 8, 321
3. To Hendrik A. Lorentz, 8, 322
4. To Felix Klein, 8, 323
13. To Friedrich Adler, 8, 324
13. From Prussian Minister of Education, 8, C
14. To Willem de Sitter, 8, 325
15. From Otto Neurath, 8, 326
16. To Heinrich Zangger, 10: Vol. 8, 326a
18. From Willem de Sitter, 8, 327
21. To Felix Klein, 8, 328
25. From Friedrich Adler, 8, 329
27. To Eduard Hartmann, 8, 330
28. From Hans Albert Einstein, 10: Vol. 8, 330a
before 29. To Heinrich Zangger, 10: Vol. 8, 330b
29. To Michele Besso, 8, 331
30. To Emil Beck, 8, 332

May
4. To Heinrich Zangger, 10: Vol. 8, 332a
4. From Michele Besso, 8, 333
5. From Michele Besso, 8, 334
5 and 6. To Heinrich Zangger, 10: Vol. 8, 333a
7. To Michele Besso, 8, 335
7. From Friedrich Adler, 8, 336
10-11. From Walther Rathenau, 8, 337
11. To Paul Mamroth, 8, 338
13. To Michele Besso, 8, 339
15. To Michele Besso, 8, 340
18. From Fritz Genewein, 8, C
19. To David Hilbert, 8, 341
20. From Heinrich Zangger, 8, 342
21. To Moritz Schlick, 8, 343
23 or 30. To Heinrich Zangger, 10: Vol. 8, 343a
25. To Paul Ehrenfest, 8, 344
26. To Hans Albert Einstein, 10: Vol. 8, 344a
26. From Max Planck, 8, 345
30. From Gustav Mie, 8, 346

June
1. From Hans Albert Einstein, 10: Vol. 8, 346a
1. From Wilhelm Wien, 8, 347
2. To Gustav Mie, 8, 348
2. To Wilhelm Wien, 8, 349
2. To Heinrich Zangger, 10: Vol. 8, 349a
3. To Paul Ehrenfest, 8, 350
4. From Imperial Academy of Sciences in Vienna, 8, C
12. To Heinrich Zangger, 10: Vol. 8, 350a
14. To Imperial Academy of Sciences in Vienna, 8, C
14. To Willem de Sitter, 8, 351
14. From Paul Ehrenfest, 8, 352
17. To Heinrich Zangger, 10: Vol. 8, 352a
17. From Erwin Freundlich, 8, 353
18. From Max von Laue, 8, 354 20. From Willem de Sitter, 8, 355
22. To Willem de Sitter, 8, 356 24. To Michele Besso, 8, 357
24. To Heinrich Zangger, 10: Vol. 8, 357a
25. From Max von Laue, 8, 358
27. To Werner Bloch, 10: Vol. 8, 358a
28. To Willem de Sitter, 8, 359
30. To Elsa Einstein, 10: Vol. 8, 359a

July
1. To Elsa Einstein, 10: Vol. 8, 359b
3. To Elsa Einstein, 10: Vol. 8, 359c
4. From Friedrich Adler, 8, 360
4. To Elsa Einstein, 10: Vol. 8, 359d
9. To Elsa Einstein, 10: Vol. 8, 360a
10. To Elsa Einstein, 10: Vol. 8, 360b
11-17. From Hans Thirring, 8, 361
12. To Elsa Einstein, 10: Vol. 8, 361a
13. To Elsa Einstein, 10: Vol. 8, 361b
16. To Elsa Einstein, 10: Vol. 8, 361c
17. To Elsa Einstein, 10: Vol. 8, 361d
17. To Heinrich Zangger, 10: Vol. 8, 361e
19. To Elsa Einstein, 10: Vol. 8, 361f
20. To Heinrich Zangger, 10: Vol. 8, 361g
22. To Paul Ehrenfest, 8, 362
22. To Willem de Sitter, 8, 363
23. From Franz Selety, 8, 364
24. To Elsa Einstein, 10: Vol. 8, 364a
25. To Elsa Einstein, 10: Vol. 8, 364b
26. To Elsa Einstein, 10: Vol. 8, 364c
28. To Elsa Einstein, 10: Vol. 8, 364d
29. To Heinrich Zangger, 8, 365
30. To Elsa Einstein, 10: Vol. 8, 365a
31. To Willem de Sitter, 8, 366
July-Oct. From Central Organization of German Citizens of the Jewish Faith, 8, C

August
1. To Michele and Anna Besso-Winteler, 8, 367
1. To Elsa Einstein, 10: Vol. 8, 367a
1. To Heinrich Zangger, 10: Vol. 8, 367b
2. To Tullio Levi-Civita, 8, 368
2. To Hans Thirring, 8, 369
6. To Elsa Einstein, 10: Vol. 8, 369a
7. To Elsa Einstein, 10: Vol. 8, 369b
8. To Willem de Sitter, 8, 370
8. To Heinrich Zangger, 10: Vol. 8, 370a
9. To Elsa Einstein, 10: Vol. 8, 370b
11. To Elsa Einstein, 10: Vol. 8, 370c
11. To Heinrich Zangger, 10: Vol. 8, 370d
13. To Elsa Einstein, 10: Vol. 8, 370e
15. To Michele Besso, 8, 371
15. To Elsa Einstein, 10: Vol. 8, 371a
17. To Elsa Einstein, 10: Vol. 8, 371b
19. To Paul Seippel, 8, 372
19. To Alice Steinhardt, 8, C
21. To Heinrich Zangger, 10: Vol. 8, 372a
21. From Romain Rolland, 8, 373
22. To Elsa Einstein, 10: Vol. 8, 373a
22. To Romain Rolland, 8, 374
23. To Elsa Einstein, 10: Vol. 8, 374a
23. From Tullio Levi-Civita, 8, 375
23. From Romain Rolland, 8, 376
26. To Heinrich Zangger, 10: Vol. 8, 376a
28. To Elsa Einstein, 10: Vol. 8, 376b
after 29. From Rozsika (Zorka) Maric, 8, C
31. To Elsa Einstein, 10: Vol. 8, 376c

September
3. To Michele Besso, 8, 377
3. To Elsa Einstein, 10: Vol. 8, 377a
3. To Erwin Freundlich, 8, 378
6. To Elsa Einstein, 10: Vol. 8, 378a
12. From Adolf von Harnack, 8, 379
14. To Wadysaw Natanson, 8, 380
15. To Heinrich Zangger, 10: Vol. 8, 380a
22. To Michele Besso, 8, 381
22–28. From Gunnar Nordström, 8, 382
24. To Edouard Guillaume, 8, 383
24. From Adolf von Harnack, 8, C
26. To Walter Schottky, 8, 384

October
3. From Edouard Guillaume, 8, 385
6. To Michele Besso, 10: Vol. 8, 385a
6. To Adolf von Harnack, 8, 386
9. To Edouard Guillaume, 8, 387
10. To Walter Schottky, 8, 388
10. From Adolf von Harnack, 8, 389
15. To Hans Albert Einstein, 8, 390
15. To Michele Besso, 10: Vol. 8, 390a
15. To Werner Weisbach, 8, 391
15. To Heinrich Zangger, 10: Vol. 8, 391a
17. From Edouard Guillaume, 8, 392
18. From H. Czinner, 8, C
23. From Gunnar Nordström, 8, 393
24. To Edouard Guillaume, 8, 394
29. From Franz Selety, 8, 395
30. To Edgar Meyer, 8, 396

November
8. From Zofija Smoluchowska-Baraniecka, 8, 397
11. From Rudolf Förster, 8, 398
12. To Paul Ehrenfest, 8, 399
16. To Rudolf Förster, 8, 400
20. From Adolf von Harnack, 8, C

December
3. From Hans Thirring, 8, 401
4. From Erwin Freundlich, 8, 402
5. To Ernst Riesenfeld, 8, C
6. To Heinrich Zangger, 8, 403
6. From Erwin Freundlich, 8, 404
7. To Hans Thirring, 8, 405
9. To Hans Albert Einstein, 8, 406
11. From Friedrich Schmidt-Ott, 8, C
11. From Wilhelm von Siemens, 8, C
12. From Adolf von Harnack, 8, C
12. From Ernst, Riesenfeld, 8, C
14. To Gustav Mie, 8, 407
14. To Hans Tanner, 8, C
15. To Felix Klein, 8, 408
before 16. To Wilhelm von Siemens, 8, 409
17. From Gustav Mie, 8, 410
17. From Ruff, 8, C
17. From Heinrich Zangger, 8, 411
17. From Heinrich Zangger, 8, 412
18. To Hendrik A. Lorentz, 8, 413
18. From Richard Müller, 8, C
19. From Bontraeger Bros., 8, C
19. From Max von Laue, 8, 414
19. From Hans Reissner, 8, C
21. From Frankfurter Zeitung, 8, C
21. From Münchener Zeitung, 8, C
22. To Otto Marx, 8, 415
22. To Gustav Mie, 8, 416
24. To Hans Albert Einstein, 8, 417
24. From Wilhelm von Siemens, 8, C
25. From Walther Nernst, 8, 418
26. From Georg Rödiger, 8, C
27. From Michele Besso, 8, 419
28. From Rudolf Förster, 8, 420
29. To Gustav Mie, 8, 421
29. From Mercur Aircraft Company, 8, 422
29. From Max Planck, 8, 423
31. From Heinrich Zangger, 8, 424

1918

January
3. To Werner Bloch, 10: Vol. 8, 424a
4. To Wilhelm von Siemens, 8, 425
4. From Wilhelm Schweydar, 8, 426
4. From Wilhelm Schweydar, 8, 427
5. To Michele Besso, 8, 428
5. To Roland von Eötvös, 8, 429
5. From Karl Scheel, 8, 430
6. From Hugo A. Krüss, 8, 431
8. From Pieter Zeeman, 8, 432
9. From Hugo A. Krüss, 8, 433
9. From Gustav Müller, 8, 434
10. To Hugo A. Krüss, 8, 435
12. From Richard Lorenz, 8, C
after 14. From Hans Albert Einstein, 10: Vol. 8, 435a
15. From Rudolf Humm, 8, 436
15. From Ludwik Silberstein, 8, C
16. To Pieter Zeeman, 8, 437
before 17. To Erwin Freundlich, 8, 438
17. To Rudolf Förster, 8, 439
17. From Emil Warburg, 8, C
18. To Rudolf Humm, 8, 440
21. From Wilhelm von Siemens, 8, 441
23. To Max Planck, 8, C
25. To Hans Albert Einstein, 8, 442
25. From Ernst Ludwig, 8, C
after 25. From Hans Albert Einstein, 10: Vol. 8, 442a
27. From Roland von Eötvös, 8, 443
28. From Heinrich Zangger, 8, 444
before 29. From Fritz Haber, 8, 445
29. To Fritz Haber, 8, 446
30. From Max von Laue, 8, 447 after
30. To Max Planck, 8, 448
31. To Mileva Einstein-Maric, 8, 449
31. To Roland von Eötvös, 8, 450
31. To Hugo A. Krüss, 8, 451
31. From Cornelia and Gunnar Nordström, 8, 452

February
1. To Arnold Sommerfeld, 8, 453
1. To Kaiser-Wilhelm Institute of Physics, board of trustees, 8, C
after 1. To Arnold Sommerfeld, 8, 454
2. From Mendelssohn & Co., 8, C
4. From Ernst Troeltsch, 8, 455
5. From Gustav Mie, 8, 456
5. From Wilhelm von Siemens, 8, C
after 6. From Mileva Einstein-Maric, 8, 457
7. From Ernst Troeltsch, 8, 458
8. To Hedwig Born, 8, 459
8. To Gustav Mie, 8, 460
8. From Emil Warburg, 8, 461
9. From Mileva Einstein-Maric, 10: Vol. 8, 461a
11. From Franz von Hoefft, 8, C
11. From Albrecht J. H. Preuss, 8, C
13. From Max Planck, 8, 462
16. From Rudolf Förster, 8, 463
16. From Arnold Sommerfeld, 8, 464
17–19. From Gustav Mie, 8, 465
18. From Hermann Fricke, 8, C
18. From Max von Laue, 8, 466
19. To Rudolf Förster, 8, 467
21. From Hermann Coenen, 8, 468
21. From Heinrich Zangger, 8, 469
22. To Gustav Mie, 8, 470
24. To Karl Camillo Schneider, 8, 471
27. To Heinrich Zangger, 10: Vol. 8, 471a
after 27. To Heinrich Zangger, 10: Vol. 8, 471b

March
1. From Hermann Weyl, 8, 472
4. From Heinrich Zangger, 8, 473
after 4. To Anna Besso-Winteler, 8, 474
after 4. From Anna Besso-Winteler, 8, 475
5. From Mileva Einstein-Maric, 10: Vol. 8, 475a
6. From Maja Winteler-Einstein, 10: Vol. 8, 475b
8. To Hermann Weyl, 8, 476
8. From Arnold Sommerfeld, 8, 477
9. From Karl Scheel, 8, 478
12. From Max Planck, 8, 479
13. To Felix Klein, 8, 480
15. From Hermann Fricke, 8, C
16. From Karl Camillo Schneider, 8, 481
after 16. From Karl Camillo Schneider, 8, 482
before 17. From Mileva Einstein-Maric, 10: Vol. 8, 482a
before 17. From Mileva Einstein-Maric, 10: Vol. 8, 482b
17. To Mileva Einstein-Maric, 8, 483
17. From H. Ed. Brandt, 8, C
after 17. To Mileva Einstein-Maric, 8, 484
19. From Rudolf Förster, 8, 485
19. From Max Planck, 8, 486
20. From Felix Klein, 8, 487
21. From Gustav Mie, 8, 488
21. From Elisabeth Warburg, 8, 489
22. From Georg Helm, 8, 490
23. To Otto H. Warburg, 8, 491
23. From H. Ed. Brandt, 8, C
23. From Heinrich Könemann, 8, C
24. To Felix Klein, 8, 492
24. To Gustav Mie, 8, 493
27. From Paul Ehrenfest, 8, 494
28. From Heiinrich Könemann, 8, C
28. From Vero Besso, 10: Vol. 8, 494a
after 28. To Vero Besso, 10: Vol. 8, 494b
30. From Friedrich Kottler, 8, 495
30. From Romeo Wankmüller, 8, 496
31. From Jean Loeffler, 8, C

April
3. To Mileva Einstein-Maric, 10: Vol. 8, 496a
4. From Mileva Einstein-Maric, 10: Vol. 8, 496b
5. From Hermann Weyl, 8, 497
6. To Hermann Weyl, 8, 498
7. To Hans Tanner, 8, C
8. To Hermann Weyl, 8, 499
10. To Felix Klein, 8, 500
10. From Willem de Sitter, 8, 501
before 11. To Hugo A. Krüss, 8, 502
11. From Friedrich Glum, 8, C
12. To David Hilbert, 8, 503
14. From Wilhelm Schweydar, 8, 504
before 15. To Mileva Einstein-Maric, 8, 505
15. To Willem de Sitter, 8, 506
15. To Hermann Weyl, 8, 507
15. From Hugo A. Krüss, 8, 508
15. From Hermann Weyl, 8, 509
16. From Margarete Hamburger, 8, 510
17. From S. Ogden Steinhardt, 8, C
18. To Hermann Weyl, 8, 511
19. To Hermann Weyl, 8, 512
19. To Hermann Weyl, 8, 513
21. From Johann Mayer, 8, C
before 22. From Hans Albert Einstein, 10: Vol. 8, 513a
22. To Heinrich Zangger, 8, 514
22. From Mileva Einstein-Maric, 10: Vol. 8, 514a
23. To Mileva Einstein-Maric, 8, 515
before 24. To Auguste Hochberger, 8, 516
before 24. To Auguste Hochberger, 8, 517
25. From Felix Klein, 8, 518
26. To Mileva Einstein-Maric, 8, 519
26. To Minna Stern, 8, C
after 26. To Hans Albert Einstein, 8, 520
before 27. To David Hilbert, 8, 521
before 27. To David Hilbert, 8, 522
27. To Felix Klein, 8, 523
27. From David Hilbert, 8, 524
27. From Hermann Weyl, 8, 525
28. From Georg Klemperer, 8, C
28. From Hermann Weyl, 8, 526
30. From Marga Planck, 8, 527

May
1. To Paul Ehrenfest, 8, 528
1. To Hermann Weyl, 8, 529
1. From David Hilbert, 8, 530
1. From Wilhelm von Siemens, 8, C
1. From Ernst Troeltsch, 8, 531
3. From Stefan Röhm, 8, C
6. From Gustav Mie, 8, 532
before 8. From Mileva Einstein-Maric, 10: Vol. 8, 532a
before 8. To Mileva Einstein-Maric, 8, 533
before 8. To Heinrich Zangger, 10: Vol. 8, 533a
before 8. To Reichsbank, board of directors, 10: Vol. 9, C
8. From Reichsbank, board of directors, 10: Vol. 9, C
8. From Paul Ehrenfest, 8, 534
9. From Wilhelm Nixdorf, 8, C
10. To Hermann Weyl, 8, 535
10. From Hansjoachim H. Norda, 8, C
11. From Gustav Bucky, 8, C
12. To Ilse Einstein, 8, 536
12. To Georg F. Nicolai, 8, 537
12. From Max Wien, 8, 538
15. From Charlotte Weigert, 8, 539
17. To Max Jakob, 10: Vol. 8, 539a
18. From Gustav Bucky, 8, C
18. From Felix Klein, 8, 540
18. From Georg F. Nicolai, 8, 541
18. From Max Wien, 8, 542
19. To Felix Klein, 8, 543
19. From Hermann Weyl, 8, 544
22. To Kaiser-Wilhelm Institute of Physics, board of trustees, 8, C
22. From Friedrich Vieweg, 8, C
before 23. From Mileva Einstein-Maric, 10: Vol. 8, 545a
23. To Mileva Einstein-Maric, 8, 546
23. From Zionist Association of Germany, 8, 547
24. To David Hilbert, 8, 548
25. From Hermann Isensee, 8, C
28. To Felix Klein, 8, 549
29. From Max von Laue, 8, 550
29. From Wilhelm von Siemens, 8, C
31. To Hermann Weyl, 8, 551
31. From Felix Klein, 8, 552

June
1. To Arnold Sommerfeld, 8, 553
1. From Felix Klein, 8, 554
after 1. From Arnold Sommerfeld, 8, 555
2. From Hansjoachim H. Norda, 8, C
before 3. To Felix Klein, 8, 556
3. From E. Wollermann, 8, C
4. To Mileva Einstein-Maric, 8, 557
after 4. From Mileva Einstein-Maric, 10: Vol. 8, 557a
after 4. From Hans Albert Einstein, 10: Vol. 8, 557b
after 4. From Eduard Einstein, 10: Vol. 8, 557c
5. To Paul Ehrenfest, 8, 558
6. From Anschütz and Company, 8, 559
7. To Adolf Kneser, 8, 560
9. To Felix Klein, 8, 561
10. From Maja Winteler-Einstein, 10: Vol. 8, 561a
10. From Paul Winteler, 10: Vol. 8, 561b
13. To Hugo A. Krüss, 10: Vol. 8, 563a
13. From Hugo A. Krüss, 8, 563
15. From Walter Dällenbach, 8, 564
after 15. To Walter Dällenbach, 8, 565
16. From Felix Klein, 8, 566
18. From Hansjoachim H. Norda, 8, C
20. To Felix Klein, 8, 567
21. From Anschütz and Company, 8, 568
23. To Walter Schottky, 8, 569
24. To Max Born, 8, 570
24. To Heinrich Zangger, 8, 571
before 28. To Michele Besso, 8, 572
before 28. To Eduard Einstein, 8, 573
29. To Karl Scheel, 8, 574
after 29. To Max Born, 8, 575
after 29. To Hans Albert Einstein, 8, 576

July
2. From Peter Debye, 8, 577
after 2. To Max Planck, 8, 578
3. To Hermann Weyl, 8, 579
after 3. To Max Born, 8, 580
5. From Felix Klein, 8, 581
6. From Friedrich Adler, 8, 582
7. From Adolf Kneser, 8, 583
8. From Max Planck, 8, 584
before 9. To Mileva Einstein-Maric, 8, 585
9. To Michele Besso, 8, 586
12. From Anschütz and Company, 8, 587
15. From Felix Klein, 8, 588
16. From Peter Debye, 8, C
ca. 17. From Mileva Einstein-Maric, 10: Vol. 8, 588a
ca. 17. From Hans Albert Einstein, 10: Vol. 8, 588b
ca. 17. From Eduard Einstein, 10: Vol. 8, 588c
19. To Max Planck, 8, C
21. To Hedwig Born, 8, C
22. To Felix Klein, 8, 589
25. From H. C. Marx, 8, C
28. From Hedwig and Max Born, 8, 590
29. To Michele Besso, 8, 591
30. From H. C. Marx, 8, C
31. From R. Blochmann, 8, C

August
1–Nov. To Arnold Sommerfeld, 8, 592
2. To Hedwig and Max Born, 8, 593
4. To Friedrich Adler, 8, 594
8. To Walter Dällenbach, 8, 595
9. From Friedrich Adler, 8, 596
before 11. To Heinrich Zangger, 8, 597
before 11. From Heinrich Zangger, 8, 598
11. From Edgar Meyer, 8, 599
11. From Theodor Rosenheim, 8, 600
16. To Heinrich Zangger, 8, 601
18. To Edgar Meyer, 8, 602
19. From Hermann Anschütz-Kaempfe, 8, 603
20. To Michele Besso, 8, 604
20. To Felix Ehrenhaft, 8, 605
22. To Hermann Anschütz-Kaempfe, 8, 606
27. To Kaiser-Wilhelm Institute of Physics, board of trustees, 8, C
28. To Michele Besso, 8, 607
28. From Michele Besso, 10: Vol. 8, 607a
29. From Friedrich Vieweg, 8, C

September
2. From Gino Mettler, 8, C
3. To Gino Mettler, 8, C
4. To Paul Ehrenfest, 8, 608
4. From Peter Debye, 8, 609
5. From Max Frischeisen-Köhler, 8, 610
7. From Kurt Hiller, 8, 611
8. To Michele Besso, 8, 612
9. To Kurt Hiller, 8, 613
11. From Mendelssohn & Co., 8, C
12. From Edgar Meyer, 8, 614
before 14. To Lise Meitner, 8, 615
14. To Lise Meitner, 8, 616
14. From Wilhelm von Siemens, 8, C
16. To Ernst Trendelenburg, 8, 617
17. To Eduard Study, 8, 618
18. To Kaiser-Wilhelm Institute of Physics, board of trustees, 8, C
18. From Hermann Weyl, 8, 619
19. To Hans Tanner, 8, C
20. From Friedrich Adler, 8, 620
21. To Heinrich Zangger, 10: Vol. 8, 620a
23. To Paul and Maja Winteler-Einstein, and Pauline Einstein, 8, 621
23. From Eduard Study, 8, 622
23. From Hans Vaihinger, 8, 623
25. To Eduard Study, 8, 624
27. To Paul Ehrenfest, 8, 625
27. To Hermann Weyl, 8, 626
27. From Peter Debye, 8, C
27. From Eduard Study, 8, 627
29. To Friedrich Adler, 8, 628
30. To Friedrich Adler, 8, 629

October
before 1. From Nobel Committee for Physics of the Royal Swedish Academy of Sciences, 8, C
3. From Felix Ehrenhaft, 8, 630
5. To Heinrich Zangger, 10: Vol. 8, 630a
7. To Kaiser-Wilhelm Institute of Physics, board of trustees, 8, C
8. To Pauline Einstein, 8, 631
10. From Wilhelm von Siemens, 8, C
12. From Friedrich Adler, 8, 632
after 12. To Edgar Meyer, 8, 633
14. To Emil Zürcher, 8, C
17. To Hans Albert Einstein, 8, 634
17. From Arnold Berliner, 8, C
before 18. To Nobel Committee for Physics of the Royal Swedish Academy of Sciences, 8, 635
20. To Friedrich Adler, 8, 636
20. From Edgar Meyer, 8, 637
22. To Felix Klein, 8, 638
24. From Hans Mühsam, 8, 639
after 24. From Mileva Einstein-Maric, 10: Vol. 8, 639a
26. From Max Planck, 8, 640
28. To Felix Klein, 8, 641
29. To Lise Meitner, 8, 642
31. From Erwin Freundlich (Bericht), 8, C

November
1. From Wilhelm von Siemens, 8, C
2. From Paul Bernays, 8, 643
4. To Edgar Meyer, 8, 644
5. From Felix Klein, 8, 645
6. From Otto Radtke, 8, C
7. From Prussian Minister of Education, 8, C
8. To Felix Klein, 8, 646
before 9. From Mileva Einstein-Maric, 10: Vol. 8, 646a
ca. 9. To Mileva Einstein-Maric, 8, 647
ca. 10. From Heinrich Zangger, 8, 648
10. From Michele Besso, 8, 649
10. From Felix Klein, 8, 650
before 11. To Minna Stern, 8, C
11. To Pauline Einstein, 8, 651
11. To Paul and Maja Winteler-Einstein, 8, 652
12. or later. To Leo Arons, 8, 653
14. To Svante Arrhenius, 8, 654
15. To Ludwig Quidde, 8, 655
16. From Ludwig Quidde, 8, 656
16. From Hermann Weyl, 8, 657
before 19. To Arnold Berliner, 8, 658
21. From Emil Simonson, 8, C
22. From Paul Bernays, 8, 659
22. From Paul Winteler, 10: Vol. 8, 659a
25. To Carl H. Becker, 8, 660
23. To Kaiser-Wilhelm Institute of Physics, board of trustees, 8, C
ca. 25. From Hans Albert Einstein, 10: Vol. 8, 659b
ca. 25. From Eduard Einstein, 10: Vol. 8, 659c
29. To Hermann Weyl, 8, 661
29. From Maja Winteler-Einstein, 10: Vol. 8, 661a
29. From Paul Winteler, 10: Vol. 8, 661b

December
3. From Max Jakob, 10: Vol. 8, 661c
3. From Arnold Sommerfeld, 8, 662
4. To Michele Besso, 8, 663
5. To Max Jakob, 10: Vol. 8, 663a
5. From Adolf von Harnack, 8, C
6. To Paul Ehrenfest, 8, 664
6. To Arnold Sommerfeld, 8, 665
9. From Teubner publishing house, 8, C
9. From Zionist Association of Germany, 8, 666
10. To Hans Albert and Eduard Einstein, 8, 667
10. To Moritz Schlick, 8, 668
10. From Hermann Weyl, 8, 669
12. From Heinrich Mousson, 8, 670
12. From Zionist Association of Germany, 8, 671
mid. To Mileva Einstein-Maric, 8, 672
16. To Hermann Weyl, 8, 673
16. From Carl Haider, 8, C
17. To Heinrich Mousson, 8, 674
19. From Friedrich Voltz, 8, C
before 20. To Fritz Haber, 8, 675
21. From Junghans, 8, C
23. From Department of Education, Canton of Zurich, 10: Vol. 9, C
23. From Ernst Trendelenburg, 8, C
27. To Felix Klein, 8, 677
28. From Konstantin Nowak, 8, C

1919

January
3. From Hans Kost, 9, C
9. From Department of Education, Canton of Zurich, 9, C
10. To Mileva Einstein-Maric and Hans Albert Einstein, 9, 1
15. To Hedwig and Max Born, 9, 2
19. To Hedwig and Max Born, 9, 3
20. To Paul Winteler, 9, C 20. From Erwin Freundlich, 9, C
26. From Bank-Verein Filiale Prag, Wiener, 9, C
after 26. To Bank-Verein Filiale Prag, Wiener, 9, C
28. From Theodor Vetter, 9, 4

February
5. To Arnold Sommerfeld, 9, 5
10. From Hermann Fricke, 9, C
19. From Wilhelm von Siemens, 9, C
26. From Barth Publishing House, 9, C
28. To Heinrich Zangger, 9, 7
end of. From Heinrich Zangger, 10: Vol. 9, 7a

March
1. To Erwin Freundlich, 9, 8
1. From Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
3. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
7. From Constantin von Mereschkowsky, 9, C
9. From Albert Karr, 9, C
9. From Hans Karr, 9, C
13. To R. Pechel, 9, C
after 15. From Georg Krakow, 9, C
17. To Karl Scheel, 9, 9
19. From Albert Karr, 9, C
22. To Paul Ehrenfest, 9, 10
25. From Wilhelm Lenz, 9, 11
25. From Arnold Sommerfeld, 9, 12
25. From Arnold Sommerfeld, 9, C
26. From Otto Lehmann, 9, C
26. From Hugo Seemann, 9, 13
27. From Erwin Freundlich, 9, 14
27. From Wilhelm Hammer, 9, C
27. From Hauck, 9, C
27. From Franz Himstedt, 9, C
29. To Erwin Freundlich, 9, 15
31. To Aurel Stodola, 9, 16
31. From Friedrich Krüger, 9, C
31. From Rudolf Seeliger, 9, C

April
4. To Pauline Einstein and Maja Winteler-Einstein, 9, 17
5. From Ernst Wagner, 9, C
6. From Walter Steubing, 9, C
7. From Max von Laue, 9, 18
7. From Alfred Magnus, 9, C
8. From Karl Försterling, 9, C
8. From Walter Kaufmann, 9, C
8. From H. Starke, 9, C
9. From Arnold Berliner, 9, 19
9. From Helene Stöcker, 9, 20
11. From H. Rosenberg, 9, C
12. From Georg Count von Arco, 9, 21
13. From Otto Lehmann, 9, C
14. To Felix Klein, 9, 22
14. From Erich Regener, 9, C
14. From Georg Wendt, 9, C
15. To Emil Zürcher, 9, 23
16. To Felix Klein, 9, 24
16. From Otto Lehmann, 9, C
16. From Robert W. Pohl, 9, C
16. From Wilhelm Westphal, 9, C
17. From Glüer, 9, C
17. From Leonhard Grebe, 9, 25
17. From Otto Radtke, 9, C
19. From Bernhard Mueller, 9, C
ca. 20. From Hans Albert Einstein, 10: Vol. 9, 25a
21. To Theodor Kaluza, 9, 26
22. To Mendelssohn & Co., 9, C
22. From Felix Klein, 9, 27
25. From Wilhelm von Siemens, 9, C
26. To Leonhard Grebe, 9, C
26. To Franz Himstedt, 9, C
26. To Wilhelm Lenz, 9, C
26. To Hendrik A. Lorentz, 9, 28
26. To H. Rosenberg, 9, C
26. To H. Starke, 9, C
26. From Wilhelm von Siemens, 9, C
27. From Hans Vaihinger, 9, 29
28. To Theodor Kaluza, 9, 30
28. To Walter Kaufmann, 9, C
28. To Otto Lehmann, 9, C
28. To Hugo Seemann, 9, C
29. From Edith Einstein, 9, 31
29. From Rudolf Seeliger, 9, C
29. From Otto Radtke, 9, C

May
1. From Georg Krakow, 9, C
1. From Hugo A. Krüss, 9, C
2. To Karl Försterling, 9, C
2. To Kaiser-Wilhelm Institute of
Physics, board of trustees, 9, C
2. From Paul Epstein, 9, 32
2. From Wilhelm Hallwachs, 9, C
2–9. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
2. From Hugo Seemann, 9, C
3. To Hans Vaihinger, 9, 33
4. From Hendrik A. Lorentz, 9, 34
5. To Leonhard Grebe, 9, C
5. To Theodor Kaluza, 9, 35
5. From Walter Kaufmann, 9, C
6. To Georg Krakow, 9, C
6. To Hugo Seemann, 9, C
7. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9. C
9. To Wander de Haas, 9, 36
11. To Paul Natorp, 9, 37
11. From Hugo Seemann, 9, 38
14. To Pauline Einstein et al., 9, 39
14. To Theodor Kaluza, 9, 40
14. From Christian Jensen, 9, C
14. From Georg Krakow, 9, 41
16. To Christian Jensen, 9, C
16. From Wilhelm Hallwachs, 9, C
16. From Siegfried Valentiner, 9, C
18. To Roland Holder, 9, 42
19. To Peter Debye, 9, C
19. To Schwäbischer Bund, 9, 43
19. To Munich Military Tribunal, 9, 44
20. To Siegfried Valentiner, 9, C
22. To Wilhelm Hammer, 9, C
24. From I. Rosenberg, 9, C
24. From Eduard Study, 9, 45
25. To Robert W. Pohl, 9, C
25. To I. Rosenberg, 9, C
25. To Friedrich Krüger, 9, C
25. To Ernst Wagner, 9, C
25. From Friedrich Krüger, 9, C
25. From Alfred Magnus, 9, C
27. To Erich Regener, 9, C
27. To Walter Steubing and Georg Wendt, 9, C
27. To Wilhelm Westphal, 9, C
28. From Felix Ehrenhaft, 9, 46
28. From Arrien Johnsen, 9, 47
29. To Theodor Kaluza, 9, 48
29. From Wilhelm Westphal, 9, C
30. From Philipp Frank, 9, 49
30. From Roland Holder, 9, 50

June
before 1. From Heinrich Zangger, 9, 51
1. To Heinrich Zangger, 9, 52
1. From Alfred Magnus, 9, C
after 1. From Heinrich Zangger, 9, 53
2. From Friedrich Krüger, 9, C
3. From Robert W. Pohl, 9, C
4. To Max Born, 9, 56
6. From Leonhard Grebe, 9, 57
8. From Peter P. Koch, 9, C
9. From David Hilbert, 9, 58
10. From Christian Jensen, 9, C
11. To David Hilbert, 9, 59
11. From Karl Försterling, 9, C
11. From Rudolf Seeliger, 9, C
12. From Erich Regener, 9, C
before 13. From Hans Albert Einstein, 10: Vol. 9, 59a
before 13. From Eduard Einstein, 10: Vol. 9, 59b
13. To Hans Albert and Eduard Einstein, 9, 60
16. To Pauline Einstein, 9, 61
16. From Wilhelm Hammer, 9, C
16. From Wilhelm von Siemens, 9, C
before 18. From Heinrich Zangger, 9, 62
18. To Heinrich Zangger, 9, 63
19. From Allgemeine Gesellschaft für chemische Industrie, 9, C
20. From Adolf von Harnack, 9, C
22. To Mendelssohn & Co., 9, C
24. From Peter Debye, 9, C
24. From Max Hofsäss, 9, C
26. From Paul Natorp, 9, 64
27. From Wilhelm von Siemens, 9, C
28. From Walter Steubing, 9, C
29. From Leonhard Grebe, 9, C
29. From Gustav Mie, 9, 65
ca. 29. To Walter Dällenbach, 9, 66
30. To Elsa Einstein, 10: Vol. 9, 66a

July
1. To Elsa Einstein, 10: Vol. 9, 68a
1. From Max Born, 9, C
1. From Jakob Grommer, 9, 67
1. From Adolf Schmidt, 9, 68
2. To Elsa Einstein, 10: Vol. 9, 69a
2. From Edmund Mayer, 9, 69
2. From Ernst Wagner, 9, C
3. To Elsa Einstein, 10: Vol. 9, 70a
3. To Pauline Einstein, 9, 70
4. To Elsa Einstein, 10: Vol. 9, 70b
6. To Elsa Einstein, 10: Vol. 9, 70c
8. To Elsa Einstein, 10: Vol. 9, 70d
8. To Karl Scheel, 9, C
9. To Elsa Einstein, 10: Vol. 9, 70e
9. To Leonhard Grebe, 9, C
9–15 Aug. From Hermann Struck, 9, C
10. From Robert Holtzmann, 9, 71
12. To Elsa Einstein, 10: Vol. 9, 72a
ca. 12. From Elsa Einstein, 9, 72
14. To Elsa Einstein, 10: Vol. 9, 72b
15. To Elsa Einstein, 10: Vol. 9, 72c
17. To Elsa Einstein, 10: Vol. 9, 72d
before 18. To Ida Hurwitz, 9, C
18. From Batavian Society for Experimental Philosophy, 9, C
19. To Elsa Einstein, 10: Vol. 9, 72e
20. From Max Planck, 9, 73
ca. 20. From Fritz Haber, 9, 74
21. To Elsa Einstein, 10: Vol. 9, 74a
22. To Elsa Einstein, 10: Vol. 9, 74b
23. To Elsa Einstein, 10: Vol. 9, 74c
25. To Elsa Einstein, 10: Vol. 9, 74d
26. To Elsa Einstein, 10: Vol. 9, 74e
26. From Adriaan D. Fokker, 9, 75
26. From Hendrik A. Lorentz, 9, 76
26. From Joseph Petzoldt, 9, 77
28. To Elsa Einstein, 10: Vol. 9, 77a
29. To Elsa Einstein, 10: Vol. 9, 78a
29. From Max Planck, 9, C
30. To Adriaan D. Fokker, 9, 78
30. To Auguste Hochberger, 9, 79
31. To Elsa Einstein, 10: Vol. 9, 79a

August
1. To Hendrik A. Lorentz, 9, 80
1. From Fritz Haber, 9, 81
2. To Fritz Haber, 9, 82
2. From Hedwig Kohn, 9, 83
after 3. From Fritz Haber, 9, 84
4. To Elsa Einstein, 10: Vol. 9, 84a
6. To Conrad Habicht Sr., 9, C
7. To Pauline Einstein, 9, 86
4. From Otto Lummer, 9, 85
9. To Pauline Einstein, 9, 87
9. To Elsa Einstein, 10: Vol. 9, 86a
after 15. From Hans Albert Einstein, 10: Vol. 9, 87a
16. To Pauline Einstein, 9, 88
16. To Hans Reichenbach, 9, 89
17. To Ilse and Margot Einstein, 9, 90
17. To Robert Holtzmann, 9, 91
17. To Adolf Schmidt, 9, 92
17. To Max Hofsäss, 9, C
18. From Friedrich Krüger, 9, C
19. To Joseph Petzoldt, 9, 93
20. To Guste Hochberger, 9, 94
23. To Hedwig Kohn, 9, C
23. To Otto Lummer, 9, C
23. To Mendelssohn & Co., 9, C
23. To Joseph Petzoldt, 9, 95
23. To Prussian Ministry of Education, 9, C
25. From Mendelssohn & Co., 9, C
28. From Jean Perrin, 9, 96
29. From Maja Winteler-Einstein and
Paul Winteler, 10: Vol. 9, 96a
31. To Hedwig Born, 9, 97

September
?. From Wilhelm Foerster, 9, C
?. From Oskar Lüdeke, 9, C
2. From Paul Ehrenfest, 9, 98
3. To Eduard Hartmann, 9, C
5. To Pauline Einstein, 9, 99
5. To Eduard Study [?], 9, 100
6. To Mendelssohn & Co., 9, C
8. From Paul Ehrenfest, 9, 101
9. To Kaiser-Wilhelm Gesellschaft, 9, C
9. To Walter Steubing, 9, C
10. From Mileva Einstein-Maric, 10: Vol. 9, 101a
11. From Paul Epstein, 9, 102
12. To “Demokratischer Klub,” 9, C
12. To Paul Ehrenfest, 9, 103
12. From Wilhelm Meinhardt, 9, C
12. From Max Planck, 9, C
15. To Ilse Schneider, 9, 104
15. From Erwin Freundlich, 9, 105
15. From Vieweg publishing house, 9, C
16. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
18. To Vieweg publishing house, 9, C
19. To Erwin Freundlich, 9, 106
19. From Walter Dällenbach, 9, 107
19. From Walter Steubing, 9, C
21. To Hendrik A. Lorentz, 9, 108
21. From Paul Ehrenfest, 9, 109
22. From Hendrik A. Lorentz, 9, 110
22. or later. To Hendrik A. Lorentz, 9, C
23. To Vieweg publishing house, 9, C
23. From Max Planck, 9, C
23. From Teubner publishing house, 9, C
25. From Paul Oppenheim, 9, 111
27. To Walter Dällenbach, 9, 112
27. To Pauline Einstein, 9, 113
27. To Jean Perrin, 9, 114
28. To Paul Ehrenfest, 9, 115
28. To Teubner publishing house, 9, C
28. From Pauline Einstein, 9, 116
28. From Teubner publishing house, 9, C

October
1. From Paul Oppenheim, 9, 117
2. From Georg Wendt, 9, C
2. From Wilhelm Westphal, 9, 118
3. From Erwin Freundlich, 9, 119
3. From Teubner publishing house, 9, C
4. From Rudolf Lindemann, 9, 120
4. From Max Planck, 9, 121
5. To Paul Epstein, 9, 122
5. From Paul Ehrenfest, 9, 123
5. From Paul Ehrenfest, 9, 124
7. To Rudolf Lindemann, 9, 125
7. To Elisabeth Rotten, 9, 126
7. From Hendrik A. Lorentz, 9, 127
8. From Robert Forsch, 9, 128
9. From Walter Dällenbach, 9, 129
9. From Maja Winteler-Einstein, 10: Vol. 9, 128a
10. From Hugo Bergmann, 9, C
10. From Wilhelm Schweydar, 9, 130
11. To Paul Ehrenfest, 9, C
11. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
11. To Walter Steubing, 9, C
11. From Zurich Physics Colloquium, 9, 131
13. From Relief and Works Agency for Palestine, 9, 132
14. To Adolf von Harnack, 9, C
15. To Carl H. Becker, 9, 133
15. To Paul Ehrenfest, 9, 134
15. To Mileva Einstein-Maric, 9, 135
15. From Paul Epstein, 9, 136
15. From Moritz Schlick, 9, 137
16. To Max Born, 9, 138
16. To Zurich Physics Colloquium, 9, 139
17. To Pauline Einstein, 9, 140
17. To Otto Lehmann-Russbüldt, 9, 141
17. To Moritz Schlick, 9, 142
17. From Friedrich Schuh, 9, C
after 17. From Heinrich Zangger, 9, 143
18. From Hedwig Born, 9, 144
18. From Max von Laue, 9, 145
19. To Elsa Einstein, 10: Vol. 9, 145a
20. From Hans Thirring, 9, 146
20. To Elsa Einstein, 10: Vol. 9, 145b
21. To Elsa Einstein, 10: Vol. 9, 145c
22. From Hugo Bergmann, 9, 147
22. From Mileva Einstein-Maric, 10: Vol. 9, 148a
22. From Carl Stumpf, 9, C
22. From Heinrich Zangger, 9, 148
22. or later. To Hendrik A. Lonretz, 9, C
23. To Elsa Einstein, 10: Vol. 9, 148b
23. To Max Planck, 9, 149
23. To Prussian Academy of Sciences, 9, C
23. To Friedrich Schuh, 9, C
23. From Carl E. Büsching, 9, C
24. To Elsa Einstein, 10: Vol. 9, 149a
24. From Arnold Sommerfeld, 9, 150
24. Ilse Einstein to Theodor K. von Wasielewski, 9, C
26. To Elsa Einstein, 10: Vol. 9, 151a
26. To Pauline Einstein, 9, 151
27. From Max von Laue, 9, 152
28. To Elsa Einstein, 10: Vol. 9, 152a
30. From Hendrik A. Lorentz, 9, 153

November
3. To Carl Stumpf, 9, C
3. From Paul Ehrenfest, 9, 154
3. From Gabriele Rabel, 9, C
3. From Vieweg publishing house, 9, C
5. To Hugo Bergmann, 9, 155
5. To Jean Perrin, 9, 156
5. From Paul Winteler, 10: Vol. 9, C
5. From Paul Winteler, 10: Vol. 9, C
after 5. From Jean Perrin, 9, 157
6. To Friedrich Schuh, 9, C
6. To Theodor K. von Wasielewski, 9, 158
6. To Wilouner, 9, 159
8. To Paul Ehrenfest, 9, 160
8. From Hermann Coenen, 9, 161
before 9. To Max Born, 9, 162
9. To Benjamin de Jong van Beek en Donk, 9, 163
10. To Adolf von Harnack, 9, C
10. To Maja Winteler-Einstein and Paul Winteler, 10: Vol. 9, C
11. To Vieweg publishing house, 9, C
14. From Hendrik A. Lorentz, 9, 164
14. From Polizeipräsidium, 9, C
15. To Hendrik A. Lorentz, 9, 165
15. From Heike Kamerlingh Onnes, 9, C
16. To Mileva Einstein-Maric, 9, 166
16. To Ejnar Hertzsprung, 10: Vol. 9, 166a
16. To Arthur von Oettingen, 9, 167
18. From Adriaan D. Fokker, 9, 168
18. From Max Planck, 9, 169
18. From Max Planck, 9, C
20. From Gabriele Rabel, 9, C
21. To Moritz Schlick, 9, 170
21. From Hugo Bergmann, 9, 171
22. To Ida Hurwitz, 9, 172
22. From Adolf von Harnack, 9, C
23. From Viktor G. Ehrenberg, 9, 173
23. From Adolf Friedrich Lindemann, 9, 174
24. From Paul Ehrenfest, 9, 175
25. From Wilhelm Hort, 9, 176
26. From Robert W. Lawson, 9, 177
26. From Alexander W. Pflüger, 9, C
27. From Viggo Carling, 9, C
27. From Shmarya Levin, 9, 178
27. From Paul Oppenheim, 9, 179
28. From Robert W. Lawson, 9, 180
29. To Wilhelm Hort, 9, 181
29. From Arnold Berliner, 9, 182
29. From Richard von Mises, 9, 183
30. From Eduard Einstein, 10: Vol. 9, 183a
30. From Hans Albert Einstein, 10: Vol. 9, 183b
30. From Mileva Einstein-Maric, 10: Vol. 9, 183c

December
1. To Adolf von Harnack, 9, C
1. To Moritz Schlick, 9, 184
1. From Willem de Sitter, 9, 185
1. From Arthur S. Eddington, 9, 186
after 1. To Adriaan D. Fokker, 9, 187
3. From Kornel Loewy (Lanczos), 9, 188
4. To Viggo Carling, 9, C
4. To Paul Ehrenfest, 9, 189
4. To Prussian Academy of Sciences, 9, C
4. To Prussian Academy of Sciences, 9, C
4. From Theodor K. von Wasielewski, 9, C
5. To Mileva Einstein-Maric, 9, 190
5. To Hans Albert and Eduard Einstein, 9, 191
5. To Willem H. Julius, 9, 192
5. From Max Planck, 9, C
6. To Neue Freie Presse (Vienna), 9, 193
6. To Konrad Haenisch, 9, 194
6. To Richard von Mises, 9, 195
6. To Umschau, 9, C
6. From Felix Ehrenhaft, 9, 196
6. From Erwin Freundlich, 9, 197
8. To Max Born, 9, 198
8. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
8. To Moritz Schlick, 9, 199
8. From Ludwig Darmstaedter, 9, 200
8. From Ludwig Darmstaedter, 9, 201
8. From Edward P. Hulse, 9, C
8. From The Svedberg, 9, 202
9. From Paul Ehrenfest, 9, 203
9. From Department of Education, Canton of Zurich, 9, C
9. From Mendelssohn & Co., 9, C
10. To Paul Ehrenfest, 9, 204
10. From Richard von Mises, 9, 205
10. From Heinrich Rausch von Traubenberg, 9, 206
10. From Paul Winteler, 10: Vol. 9, 206b
10. From Maja Winteler-Einstein, 10: Vol. 9, 206a
11. From Arthur von Oettingen, 9, C
12. To Michele Besso, 9, 207
12. To Willem de Sitter, 9, 208
12. From Barth Publishing House, 9, C
13. To Pieter Zeeman, 9, 209
13. From Ethel Allen, 9, C
13. From Arnold Sommerfeld, 9, 210
14. To Felix Ehrenhaft, 9, 211
14. To Hermann Schüller, 9, 212
14. To The Svedberg, 9, 213
14. From Edgar Meyer, 9, 214
14. From Alfred Wolfer, 9, C
before 15. From Heinrich Zangger, 9, 215
mid. From Rudolf Seeliger, 9, C
15. To Arthur S. Eddington, 9, 216
15. or 22. To Heinrich Zangger, 9, 217
after 15. To Erwin Freundlich, 10: Vol. 9, 217a
16. From Gösta Mittag-Leffler, 9, 218
17. To Teubner publishing house, 9, C
17. From Mendelssohn & Co., 9, C
17. From Max Rubner, 9, C
18. To Arnold Sommerfeld, 9, 219
18. To Arnold Sommerfeld, 9, C
18. From Robert W. Lawson, 9, 220
19. From Peter Debye, 9, 221
19. From Moritz Schlick, 9, 222
19. From Jehiel J. Weinberg, 9, C
20. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
20. To Heinrich Mousson, 9, C
20. To Alfred Wolfer, 9, 223
20. From Paul Ehrenfest, 9, 224
20. From David Hilbert, 9, 225
20. From Teubner publishing house, 9, C
21. To Richard von Mises, 9, 226
21. To Teubner publishing house, 9, C
21. From Richard Fleischer, 9, 227
21. From Robert W. Lawson, 9, 228
21. From Hendrik A. Lorentz, 9, 229
21. From Carl Seelig, 9, 230
23. To Heinrich Teweles, 9, 231
23. From Leonhard Grebe and Albert Bachem, 9, 232
24. To Heinrich Zangger, 9, 233
24. From Max Planck, 9, C
26. To Robert W. Lawson, 9, 234
26. To Theodor K. von Wasielewski, 9, C
after 28. To Edgar Meyer, 9, 235
29. To Ludwig Darmstaedter, 9, 236
29. To Carl Seelig, 9, 237
29. From Richard Fleischer, 9, 238
29. From Vieweg publishing house, 9, C
30. To Vieweg publishing house, 9, C
30. From Paul Ehrenfest, 9, 239
31. From Paul Winteler, 10: Vol. 9, 239a

1920
?. To Max Hasse, 9, C

January
?. From Erwin Freundlich, 9, 240
after 1. From Hans Albert Einstein, 10: Vol. 9, 240a
2. From Hedwig Kohn, 9, 241
2. From Otto Lummer, 9, C
2. From Vieweg publishing house, 9, C
3. To Vieweg publishing house, 9, C
3. To Heinrich Zangger, 9, 242
3. From Charles-Eugene Guye, 9, 243
5. To Ethel Allen, 10, C
5. To Ilse Schneider, 9, 244
5. From Joseph Lipka, 9, C
after 5. To Joseph Lipka, 9, C
6. To Michele Besso, 9, 245
6. To Hellmut von Gerlach, 9, 246
6. To Edgar Meyer, 9, 247
6. To Emil Zürcher, 9, 248
8. From Robert W. Lawson, 9, 249
9. From Georg Count von Arco, 9, 250
9. From Theodor Des Coudres, 9, 251
9. From Max Planck, 9, C
10. From League of German Scholars and Artists, 9, 252
10. From Charlotte Weigert, 9, 253
12. To Paul Ehrenfest, 9, 254
12. To Charles-Eugene Guye, 9, 255
12. To Hendrik A. Lorentz, 9, 256
12. To Heinrich Rausch von Traubenberg, 9, 257
13. To League of German Scholars and Artists, 9, 258
13. From Friedrich Paschen, 9, 259
14. To Georg Count von Arco, 9, 260
14. From Adolf von Harnack, 9, C
14. From Paul Oppenheim, 9, 261
14. From Konrad Sannig & Co., 9, C
16. To Theodor Des Coudres, 9, 262
16. To Attilio Palatini, 9, 263
16. From Hendrik A. Lorentz, 9, 264
19. To Adolf von Harnack, 9, C
19. To Hendrik A. Lorentz, 9, 265
19. From Hugo Bergmann, 9, 266
19. From Anton Lampa, 9, 267
19. From Friedrich Paschen, 9, 268
19. From Vieweg publishing house, 9, C
20. To Rudolf Wegscheider, 9, 269
21. To Anton Lampa, 9, 270
21. To Vieweg publishing house, 9, C
21. From Arthur S. Eddington, 9, 271
21. From Paul Ehrenfest, 9, 272
21. From Charles-Eugene Guye, 9, 273
21. From Friedrich Kottler, 9, 274
22. To Robert W. Lawson, 9, 275
22. To Kornel Loewy (-Lanczos), 9,276
22. From Walter Tschuppik, 9, C
23. To Cambridge University Press, 9, C
23. To Paul Ehrenfest, 9, 277
23. To Friedrich Paschen, 9, 278
23. From Ernest B. Ludlam, 9, 279
25. From Edouard Guillaume, 9, 280
25. From Robert W. Lawson, 9, C
25. From Edgar Meyer, 9, 281
26. To Hans Delbrück, 9, 282
26. From Leonhard Grebe and Albert Bachem, 9, 283
27. To Hedwig and Max Born, 9, 284
27. To Cambridge University Press, 9,285
27. From Alexander Eliasberg, 9, 286
27. From Anton Lampa, 9, 287
28. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
28. To Arthur Korn, 9, 288
28. From Hans Albert Einstein, 10: Vol. 9, 288a
30. To Alexander Eliasberg, 9, 289
30. From Walter Steubing, 9, C
31. From Paul Epstein, 9, 290

February
1. From Anton Lampa, 9, 291
1. From Rudolf Wegscheider, 9, 292
2. To Arthur S. Eddington, 9, 293
2. To Paul Ehrenfest, 9, 294
2. To Ludwig Hopf, 9, 295
2. To Edgar Meyer, 9, 296
2. From Robert W. Lawson, 9, 297
3. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
4. To Robert W. Lawson, 9, C
4. To Ernest B. Ludlam, 9, 298
4. To Vieweg publishing house, 9, C
before 5. Nomination of Arnold Sommerfeld and Peter Debye as Corresponding Members of the Prussian Academy of Sciences, 9, 299
5. From Marcel Grossmann, 9, 300
5. From Vieweg publishing house, 9,C
7. To Robert W. Lawson, 9, 301
7. To Rudolf Wegscheider, 9, 302
8. From Paul Ehrenfest, 9, 303
8. From Heike Kamerlingh Onnes, 9,304
8. From Karl Linz, 9, C
9. To Edouard Guillaume, 9, 305
10. To Berlin-Schöneberg Office of Taxation, 9, 306
10. To Richard von Mises, 9, 307
11. From Hendrik A. Lorentz, 9, 308
12. From Hans T. Cohn, 9, 309
12. From Heinrich Pfeiffer, 9, 310
12. From Eduard Meyer, 9, 311
13. From Eduard Meyer, 9, 312
13. From Richard Wettstein, 9, 313
after 13. To Heinrich Zangger, 9, 314
14. To Eduard Meyer, 9, 315
14. From J. J. Marthe, 9, C
15. From Edouard Guillaume, 9, 316
15. From Fritz Weigert, 9, C
18. From W. Sazyma, 9, C
19. To Konrad Haenisch, 9, 317
19. To Vieweg publishing house, 9, C
19. From David Hilbert, 9, 318
19. From Friedrich Kottler, 9, 319
after 19. From Richard von Mises, 9, C
20. From Michael Polanyi, 9, 321
21. To David Hilbert, 9, 322
21. To Richard Wettstein, 9, 323
21. From Deutsches Museum, Munich, 9, C
21. From Erwin Freundlich, 9, 324
21. From Auguste Hochberger, 9, 325
21. From Vieweg publishing house, 9, C
22. From Robert W. Lawson, 9, 326
22. From Moritz Schlick, 9, 327
22. From Friedrich Schmidt-Ott, 9, C
23. From Jeanne Rouviere, 9, C
24. From Erwin Freundlich, 9, 328
24. From Erna and Karl Reis, 9, C
24. From Vieweg publishing house, 9, C
25. From Eduard Einstein, 10: Vol. 9, 328a
26. From the Protestant Synod of Berlin, 9, 329
27. To Marcel Grossmann, 9, 330
27. To Moritz Schlick, 9, 331
27. To Heinrich Zangger, 9, 332
27. To Hans Albert Einstein, 9, 333
27. From Albert Fleck, 9, 334
28. From Friedrich Schmidt-Ott, 9, C
29. From Ernest B. Ludlam, 9, C

March
1. To Paul Ehrenfest, 9, 335
1. To Michael Polanyi, 9, 336
1. From Naturwissenschaften publishing house, 9, C
3. To Max Born, 9, 337
3. To Vieweg publishing house, 9, C
3. From Anton Lampa, 9, 338
3. From Charlotte Weigert, 9, C
4. From Carl H. Becker, 9, C
5. From Blau, 9, 339
5. From Peter Debye, 9, 340
5. From David Hilbert, 9, 341
6. To Blau, 9, 342
8. To German Society for Foreign-Book Trade, 9, 343
8. To Jeanne Rouviere, 9, C
9. To Carl H. Becker, 9, C
9. Ilse Einstein to the Protestant Synod of Berlin, 9, 346
9. From Max Planck, 9, C
9. From Walter Schottky, 9, 345
10–12. To Konrad Haenisch, 9, 349
10–12. From Paul Ehrenfest, 9, 347
10. From Ludwik Silberstein, 9, 348
10. From Vieweg publishing house, 9, C
11. From Schmitt, 9, C
12. From Georg Count von Arco, 9, 350
12. From Konrad Haenisch, 9, 351
12. From Vieweg publishing house, 9, C
13. From Moritz Schlick, 9, 352
14. From Hans Albert Einstein, 10: Vol. 9, 351a
14. From Eduard Einstein, 10: Vol. 9, 351b
15. From Arthur S. Eddington, 9, 353
16. To Vieweg publishing house, 9, C
16. From Heinrich Pfeiffer, 9, 354
17. From Hendrik A. Lorentz, 9, 355
17. From Anna Treumann, 9, C
18. To Hendrik A. Lorentz, 9, 356
18. From Marcel Grossmann, 9, 357
22. To Otto Bahn, 9, 358
22. From Emil Schwamberger, 9, C
23. From Eduard Korrodi, 9, 359
23. From Frederick A. Lindemann, 9, C
23. From Heinrich Prinz, 9, C
24. From Barth publishing house, 9, C
24. From Neue Zürcher Zeitung, 9, C
24. From D. B. Steinman, 9, C
25. From Otto Eisfelder, 9, C
26. To Hans Albert and Eduard Einstein, 9, 360
26. To Heinrich Zangger, 9, 361
26. From Friedrich Schmidt-Ott, 9, C
27. From Max von Laue, 9, 362
28. From Ludwig G. Rebholz, 9, C
after 28. To Ludwig G. Rebholz, 9, C
29. From Central Association of German Citizens of the Jewish Faith, 9, 363
29. From Walter Steubing and Heinz Kirschbaum, 9, C
31. From Adolf von Harnack, 9, C
31. From Robert W. Lawson, 9, C

April
1. To Emil Schwamberger, 9, 364
2. To Ludo Moritz Hartmann, 9, 365
3. To [Paul Nathan], 9, 366
4. From Walter Hasenclever, 9, C
4. From Hans Vaihinger, 9, 367
5. To Berufsamt für Akademiker E. V., 9, C
5. To Central Association of German Citizens of the Jewish Faith, 9, 368
5. To Hans Albert Einstein, 9, 369
5. To Adolf von Harnack, 9, C
5. To Carl Hermann Unthan, 9, 370
6. From [Franz Xaver?] Bachem, 9, C
6. From Great Lodge of Germany VIII of the Independent Order of B’nai B’rith in Berlin, 9, C
7. To Paul Ehrenfest, 9, 371
7. From Maurice Solovine, 9, 372
8. From Barth Publishing House, 9, C
9. From Theodor Däubler, 9, C
10. From Martin Knudsen, 9, C
after 10. To Theodor Däubler, 9, C
12. To Ester Heller, 9, C
12. To Gösta Mittag-Leffler, 9, C
14. To Hans Vaihinger, 9, C
13. From Berufsamt für Akademiker E. V, 9, C
13. From Paul Ehrenfest, 9, 373
14. From Georg Swarzenski, 9, C
14. From Vieweg publishing house, 9, C
after 14. To Georg Swarzenski, 9, C
15. To D. B. Steinman, 9, C
15. From Paul Kammerer, 9, 374
16. From Paul Ehrenfest, 9, 375
16. From Royal Danish Academy of Sciences and Letters, 9, C
16. From Georg Vogelpohl, 9, 376
after 16. To Georg Vogelpohl, 9, 377
17. From Philipp Frank, 9, C
19. To Moritz Schlick, 9, 378
19. To Ulrich von Wilamowitz-Moellendorff, 9, 379
19. To Heinrich Zangger, 9, 380
19. From Julius Burghold, 9, 381
20. To Max Born, 9, 382
20. To Franz Ulinski, 9, 383
20. From Federigo Enriques, 9, 384
20. From Richard von Schubert-Soldern, 9, 385
20. From Ulrich von Wilamowitz-Moellendorff, 9, C
20. From Hans Wittig, 9, 386
20-12 May. To Anton Lampa, 9, 387
after 20. To Rudolf Peters, 9, 388
21. From Bernhard Harms, 9, C
after 21. To Bernhard Harms, 9, C
22. To Robert W. Lawson, 9, 389
22. From Robert W. Lawson, 9, 390
22. From Julio Rey Pastor, 9, 391
22. From Moritz Schlick, 9, 392
23. From K. Frank, 10, C
23. From Springer publishing house, 9,C
24. To Maurice Solovine, 9, 393
24. From Gaston Moch, 9, C
24. From Paul Oppenheim, 9, 394
24. From Hans Vaihinger, 9, 395
25. To Julius Burghold, 9, 396
25. From Hermann Coenen, 9, 397
27. To Vieweg publishing house, 9, C
28. From Felix Klein, 9, 398
28. From Julio Rey Pastor, 9, C
28. From Vieweg publishing house, 9,C
29. To Mendelssohn & Co., 9, C
29. To Paul Oppenheim, 9, 399
29. From Springer publishing house, 9, C
30. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
30. To Frederick A. Lindemann, 9. C
30. To Gaston Moch, 9, C
30. To Rudolf Seeliger, 9, C

May
1. To Ludwik Silberstein, 10, 1
1. To Vieweg publishing house, 10, C
1. From Paul Ehrenfest, 10, 2
1. From Gottlieb Haberlandt, 10, 3
before 2. From Rudolf Seeliger, 10, C
2. To Niels Bohr, 10, 4
3. To Kaiser-Wilhelm Institute of Physics, board of trustees, 10, C
3. To Hans Wittig, 10, 5
3. From Gaston Moch, 10, C
4. To Paul Ehrenfest, 10, 6
4. From Maurice Solovine, 10, C
4. From Vieweg publishing house, 10, C
6. From Bernhard Harms, 10, C
7. To Elsa Einstein, 10, 7
7. To Christian Jensen, 10, C
7. To Friedrich Schuh, 10, C
7. From Adolf von Harnack, 10, C
8. From Willem H. Julius, 10, 8
8. From Adolf Wermuth, 10, C
9. To Elsa Einstein, 10, 9
after 9. From Elsa Einstein, 10, 10
10. From Ernst Cassirer, 10, 11
10. From Moritz Schlick, 10, 12
11. To Elsa Einstein, 10, 13
11. To Prussian Academy of Sciences, 10, C
11. From R. W. Drechsler, 10, C
11. From Will Großmann, 10, C
11. From Erich Marx, 10, C
11. From Julio Rey Pastor, 10, C
after 11. To R. W. Drechsler, 10, C
after 11. To Friedrich Rosen, 10, C
12. From Richard von Schubert-Soldern, 10, C
13. From Frank D. Fackenthal, 10, C
14. From Mileva Einstein-Maric, 10, 14
14. From Hans Albert Einstein, 10, 15
15. To Wostok publishing house, 10, C
15. From Robert W. Lawson, 10, C
15. From Jeanne Rouviere, 10, C
15. From Max Wertheimer, 10, 16
17. To Elsa Einstein, 10, 17
17. From Lucien Fabre, 10, 18
18. From Hendrik A. Lorentz, 10, C
18. From Friedrich Schmidt-Ott, 10, C
19. To Elsa Einstein, 10, 19
before 20. From Elsa Einstein, 10, 20
before 20. From Paul Winteler, 10, 21
20. To Elsa Einstein, 10, 22
20. From Wostok publishing house, 10, C
21. To Max Wertheimer, 10, 23
21. From Erich Regener, 10, 24
21. From Pieter Zeeman, 10, C
22. To Elsa Einstein, 10, 25
22. To Hendrik A. Lorentz, 10, 26
22. From Barth Publishing House, 10, C
22. From Max von Laue, 10, 27
23. From Carl H. Unthan, 10, 28
23. From Hans Vaihinger, 10, C
24. To the Royal Academy of Sciences in Amsterdam, 10, 29
24. From Elsa Einstein, 10, 30
24. From Peter P. Koch, 10, C
24. From Maurice Solovine, 10, C
24. From Fritz Weigert, 10, C
26. From Robert Fricke, 10, 31
26. From Vieweg publishing house, 10, C
27. To Elsa Einstein, 10, 32
27. To Ilse Einstein, 10, 33
27. To Heinrich Zangger, 10, 34
27. From Hendrik A. Lorentz, 10, 35
28. From Konrad Haenisch, 10, 36
28. From Hans Georg, Möller, 10, C
28. From Greti Moser, 10, 37
30. From Paul Epstein, 10, 38
30. From Anton Lampa, 10, 39

June
1. To Vieweg publishing house, 10, C
1. From F. M. Henkell, 10, C
1. From Frans M. Jaeger, 10, C
1. From Friedrich Schmidt-Ott, 10, C
after 1. To Erich Marx, 10, C
2. To Maurice Solovine, 10, C
2. From Adriaan D. Fokker, 10, 40
2. From Hedwig Kohn, 10, C
2. To Vieweg publishing house, 10, C
2. From Vieweg publishing house, 10, C
3. To Julio Rey Pastor, 10, C
3. To Hans Vaihinger, 10, 41
4. To Paul Epstein, 10, 42
4. To Klaus Hansen, 10, 43
5. To Ernst Cassirer, 10, 44
5. To Peter P. Koch, 10, C
5. To D. B. Steinman, 10, C
5. From Moritz Schlick, 10, C
5. From Adolf Smekal, 10, 45
6. To Columbia University, 10, C
6. To Paul Ehrenfest, 10, 46
6–15. To Friedrich Czapek, 10, C
7. To Moritz Schlick, 10, 47
7. From City Council of Greater Berlin, 10, C
7. From Peter Debye, 10, C
7. From Vieweg publishing house, 10, C
8. From Karl Gerhards, 10, C
9. To Robert Fricke, 10, 48
9. From Hendrik A. Lorentz, 10, 49
9–28 Jul. From Arthur Schoenflies, 10, 50
before 10. To Friedrich Schmidt-Ott, 10, C
10. From Moritz Schlick, 10, 51
10. From Friedrich Schmidt-Ott, 10, C
11. To Arthur S. Eddington, 10, 52
11. To Friedrich Schmidt-Ott, 10, C
12. From Moritz Schlick, 10, 53
13. From Willem H. Julius, 10, 54
14. From David Reichinstein, 10, 55
14. From Maurice Solovine, 10, C
15. To Hendrik A. Lorentz, 10, 56
15. From Robert W. Lawson, 10, C
15. From Hans Reichenbach, 10, 57
16. From Ernst Cassirer, 10, 58
16. From Friedrich Schmidt-Ott, 10, C
16. From Maurice Solovine, 10, C
17. From Friedrich Czapek, 10, C
18. To Hedwig Born, 10, 59
18. From Leonhard Grebe and Albert Bachem, 10, 60
18. From Ernst Wagner, 10, C
19. From Amelie Goldschmidt, 10, C
19. From Heinrich Zangger, 10, 61
20. From Hans Thirring, Adolf Smekal and Ludwig Flamm, 10, C
22. From Vladimir K. Arkad’ev, 10, 62
23. From Hendrik A. Lorentz, 10, 63
23. From Friedrich Schmidt-Ott, 10, C
23. From Eduard Sthamer, 10, C
before 24. To Elis Strömgren, 10, C
24. From Niels Bohr, 10, 64
24. From Adolf von Harnack, 10, C
24. From Oskar Steinel, 10, C
after 24. To Oskar Steinel, 10, C
25. To Hans Thirring, Adolf Smekal, and Ludwig Flamm, 10, 65
25. From Dinos, 10, C
29. From Moritz Schlick, 10, C
30. To Hans Reichenbach, 10, 66
30. To Moritz Schlick, 10, 67
30. From Otto von Baeyer, 10, C
30. From Edouard Guillaume, 10, 68

July
1. To Friedrich Schmidt-Ott, 10, C
1. To Ernst Wagner, 10, C
2. To Adolf Wermuth, 10, C
3. To Hedwig Kohn, 10, C
3. From Exner, 10, C
3. From Gaston Moch, 10, 69
3. From Robert W. Pohl, 10, C
4. To Hans Albert and Eduard Einstein, 10, 70
4. To Edouard Guillaume, 10, 71
5. From Lucien Fabre, 10, C
5. From Gustav Maier, 10, C
6. From S. R. Cajal, 10, C
6. From Joseph Petzoldt, 10, 72
8. From German League for the League of Nations, 10, 73
9. To Leonhard Grebe, 10, C
9. To Rudolf Mewes, 10, C
9. From Deutsche Gesellschaft für Auslandsbuchhandel, 10, C
9. From German Central Committee for Foreign Relief, 10, 74
after 9. To Deutsche Gesellschaft für Auslandsbuchhandel, 10, C
10. To Peter Debye, 10, C
10. To Robert W. Pohl, 10, C
10. To Vieweg publishing house, 10,
11. From Hedwig Kohn, 10, C
11. From Alfred Magnus, 10, C
12. To Friedrich Schmidt-Ott, 10, C
12. From Leonhard Grebe, 10, C
12. From Hugo Seemann, 10, C
12. From Cornelis van Vollenhoven, 10, C
13. From Wilhelm Hallwachs, 10, C
13. From Hans Vaihinger, 10, C
14. To Julio Rey Pastor, 10, C
14. From Edouard Guillaume, 10, C
14. From Robert W. Pohl, 10, C
15. From Ernst Cassirer, 10, C
16. To Freie Vereinigung für Technische Volksbildung, 10, C
16. From Max Born, 10, 75
17. From Lucien Fabre, 10, C
19. To Paul Ehrenfest, 10, 76
19. To Edouard Guillaume, 10, 77
19. From Wilhelm Hallwachs, 10, C
19. To Alfred Magnus, 10, C
19. To Gaston Moch, 10, 78
20. To Cornelis van Vollenhoven, 10, C
20. To Cornelis van Vollenhoven, 10, C
20. From Gerhardt Hettner, 10, C
21. To S. R. Cajal, 10, C
21. To Landgericht I, Berlin, 10, C
21. To Gösta Mittag-Leffler, 10, 79
21. To Joseph Petzoldt, 10, 80
21. From Vieweg publishing house, 10, C
23. To Mileva Einstein-Maric, 10, 81
23. To German League for the League of Nations, 10, 82
24. From Paul Ehrenfest, 10, 83
25. From Eduard Einstein, 10, 84
25. From Alfred Magnus, 10, C before
26. To Michele Besso, 10, 85
26. From Cornelis van Vollenhoven, 10, C
before 27. German News Agency for Foreign University and Student Affairs, 10, C
27. To German News Agency for Foreign University and Student Affairs, 10, 86
27. To Kaiser-Wilhelm Institute of Physics, board of trustees, 9, C
27. From Richard Fleischer, 10, C
27. From David Reichinstein, 10, C
28. From Edouard Guillaume, 10, C
29. To Richard Fleischer, 10, 87
29. To Friedrich Kottler, 10, 88
29. To Arthur Schoenflies, 10, 89
29. From Michele Besso, 10, 90
29. From Max von Laue, 10, 91
29. From Robert W. Lawson, 10, C
29. From Vieweg publishing house, 10, C
30. To Otto von Baeyer, 10, C
30. To Paul Ehrenfest, 10, 92
30. To Konrad Haenisch, 10, 93
30. From Hermann Thoms, 10, C
31. To Edouard Guillaume, 10, 94
31. From Max and Hedwig Born, 10, 95
31. From David Reichinstein, 10, C
31. To Vieweg publishing house, 10, C

August
1. To Eduard Einstein, 10, 96
3. From Allgemeine Studenten
Vertretung, 10, C
3. From Theophile de Donder, 10, 97
3. From Heinrich Stern, 10, C
4. To Hendrik A. Lorentz, 10, 98
4. From Tullio Levi-Civita, 10, C
5. From Friedrich Glum, 10, C
5. From Julio Rey Pastor, 10, C
6. From Paul Ehrenfest, 10, 99
7. From Ludwig Lange, 10, C
11. To Theophile de Donder, 10, 100
12. From Erwin Freundlich, 10, 101
13. To Paul Ehrenfest, 10, 102
13. To Julio Rey Pastor, 10, C
14. From Ernst Wagner, 10, C
15. To Allgemeine Studenten-Vertretung, 10, C
15. To Columbia University, 10, C
15. To Pieter Zeeman, 10, 103
15. From Bernardo Dessau, 10, C
16. From Walter Dällenbach, 10, C
16. From Paul Ehrenfest, 10, 104
16. From Friedrich Glum, 10, C
16. From Robert W. Lawson, 10, C
16. From Gösta Mittag-Leffler, 10, C
17. To Ernst Schuchard, 10, C
18. From Theophile de Donder, 10, 105
18. From Tullio Levi-Civita, 10, 106
18. From Adolf F. Lindemann, 10, 107
19. From Arnold Berliner, 10, 108
20. To Leo Landau, 10, C
20. From Leo Gilbert, 10, C
20. From Edouard Guillaume, 10, C
21. From Vieweg publishing house, 10, C
22. To Edouard Guillaume, 10, 109
23. From Friedrich Kottler, 10, C
24. To Rudolf Mosse, 10, C
24. From Karl Gerhards, 10, C
26. From Robert W. Lawson, 10, C
27. From Paul Ehrenfest, 10, 110
27. From Israel Malkin, 10, 111
27. From Josef Nowak, 10, C
28. From Ernst Cassirer, 10, 112
28. From Ina Dickmann, 10, 113
28. From Paul Ehrenfest, 10, 114
28. From P. Havel, 10, C
28. From F. Hennig, 10, C
29. From Artur Bartscht, 10, C
29. From Kurt J. Grau, 10, 115
29. From Moritz Schlick, 10, 116
30. From Akademisk Revy, 10, C
30. From Oscar Bie et al., 10, 117
30. From Helmut Bloch, 10, 118
30. From Fritz Haber, 10, 119
30. From Walther Meißner, 10, 120
30. From Edgar Meyer, 10, C
30. From Toni Schrodt, 10, 121
30. From Elsa Countess von Schweinitz und Krain, 10, 122
30. From Max Wolf , 10, 123
30. From Wirtschaftshilfe der deutschen Studentenschaft, 10, C
31. From Rütschke, 10, 124
31. From Matt Winteler, 10, 125

September
before 1. To Richard Fleischer, 10, C
1. From Edouard Guillaume, 10, C
1. From Maja Winteler-Einstein, 10, 126
1. From George Winchester, 10, C
2. From G. I. Calisse, 10, C
2. From Paul Ehrenfest, 10, 127
2. From Ludwig Hopf, 10, 128
2. From Willem H. Julius, 10, 129
3. From Hendrik A. Lorentz, 10, 130
3. From Erhard Schmidt, 10, C
3. From K. Schubert, 10, C
3. From Arnold Sommerfeld, 10, 131
4. To Edouard Guillaume, 10, 132
4. From Otto Lemmert, 10, C
5. From Alexander W. Pflüger, 10, 133
5. From Max Planck, 10, 133
6. To Arnold Sommerfeld, 10, 134
6. From Konrad Haenisch, 10, 135
6. From Maria Moeller-Greve, 10, C
7. From Barth publishing house, 10, C
7. From Isaak Meyer, 10, 136
8. To Konrad Haenisch, 10, 137
8. To Vieweg publishing house, 10, C
8. From Association for Combating Anti-Semitism, 10, C
8. From Hedwig Born, 10, 138
8. From Wiener Freiheitliche Studentenschaft, Akademischer Monistenbund and Akademisch Pädagogischer Verein at the University of Vienna, 10, C
before 9. To Paul Ehrenfest, 10, 139
9. To Max and Hedwig Born, 10, 140
9. To Norwegian Students’ Association, 10, 141
9. From Marcel Grossmann, 10, 142
10. From Felix Ehrenhaft, 10, 143
10. From Hendrik A. Lorentz, 10, 144
before 11. From Betsy Julius-Einthoven, 10, C
11. To Willem and Betsy Julius, 10, 145
11. From Paul Ehrenfest, 10, 146
11. From Eugen Goldstein, 10, C
11 or 11 Nov From Emil Ludwig, 10, C
11. From Harry Schmidt, 10, C
11. From Arnold Sommerfeld, 10, 147
12. To Marcel Grossmann, 10, 148
12. From C. Z. Klötzel, 10, C
13. To Kaiser-Wilhelm Institute of Physics, board of trustees, 10, C
13. To Friedrich Schmidt-Ott, 10, C
13. From Vieweg publishing house, 10, C
14. To Elsa Einstein, 10, 149
14. To the Association for Combating Anti-Semitism, 10, 150
14. To Kaiser-Wilhelm Institute of Physics, board of trustees, 10, C
15. To Hermann Thoms, 10, C
15. From Vieweg publishing house, 10, C
18. From Zentralkomitee für das ärztliche Fortbildungswesen in Preußen, 10, C
19. From Minna Cauer, 10, 151
20. From Freie Akademische Vereinigung an der Technischen Hochschule Dresden, 10, C
20. From Jacob Gottesman, 10, C
21. From Vieweg publishing house, 10, C
22. From Friedrich Adler, 10, C
22. From P. R. Bennett, 10, C
22. From Stefan Zweig, 10, 152
23. or before To Ilse Einstein, 10, 153
24. To Ilse and Margot Einstein, 10, 154
after 25. To Hendrik A. Lorentz, 10, 155
26. From Eduard Hartmann, 10, 156
26. From Ralph de Laer Kronig, 10, C
27. From Freie Akademische Vereinigung an der Technischen Hochschule Dresden, 10, C
28. From Vieweg publishing house, 10, C
29. From Deutscher Gesellig-wissenschaftlicher Verein in New York, 10, C
30. To Elisabeth Ney, 10, 157
30. From Gesellschaft Deutscher Naturforscher und Ärzte, 10, 158
30. From B. Rassow, 10, C

October
1. To Hedwig Born, 10, 159
1. From Luther P. Eisenhart, 10, 160
2. From Max and Hedwig Born, 10, 161
6. To Fritz Haber, 10, 162
6. From Wilhelm Matthies, 10, C
6. From Vieweg publishing house, 10, C
7. To Paul Ehrenfest, 10, 163
7. To Elsa Einstein, 10, 164
7. To Ilse Einstein, 10, 165
7. From Hedwig Born, 10, 166
7. From Geertruida de Haas-Lorentz, 10, C
7. From Fritz Haber, 10, 167
7. From Arnold Sommerfeld, 10, 168
8. To Gesellschaft Deutscher Naturforscher und Ärzte, 10, C
8. From Erich Wende, 10, 169
9. To Elsa Einstein, 10, 170
9. From Moritz Schlick, 10, 171
9. From Friedrich Schmidt-Ott, 10, C
10. From Hermann Anschütz-Kaempfe, 10, 172
10. From Ilse Einstein, 10, 173
11. To Max Born, 10, 174 11. From W. S. Ting, 10, C
13. From Max Born, 10, 175
13. From Hans Rahm, 10, C
14. From George B. Jeffery, 10, C
15. To Lucien Chavan and Jeanne Chavan-Perrin, 10, 176
17. From Max Flesch, 10, C after
17. To Max Flesch, 10, C
before 18. From Zeitler’s Studienhaus-Zusatz-Stiftung, board of trustees, 10, C
18. From Vilhelm Bjerknes, 10, 177
18. From Zionist Student Association of Eastern Galicia, 10, 178
19. To Elsa Einstein, 10, 179
19. From Reinhold Fürth, 10, C
22. To Elsa Einstein, 10, 179a
22. From Bertha Moszkowski, 10, 180
25. From Edgar Wöhlisch, 10, 181
26. To Max Born, 10, 182
26. To Elsa Einstein, 10, 183
28. To Elsa Einstein, 10, 184
28. From Max Born, 10, 185
28. From Paul Hertz, 10, 186
28. From Bertha Moszkowski, 10, 187
28. From Zeitler’s Studienhaus-Zusatz-Stiftung, board of trustees, 10, C
29. From Vieweg publishing house, 10, C
30. From Albert G. Schmedeman, 10, C
31. To Elsa Einstein, 10, 188

November
?. To Adolf and Friedricke Moos, 10, C
before 2. From Christian Füchtbauer, 10, C
2. From Adriaan D. Fokker, 10, 189
4. To Springer publishing house, 10, C
4. From James Franck, 10, C
4. From Willem de Sitter, 10, 190
6. From Helge Horst, 10, C
6. From Martin Knudsen, 10, C
6. From Slowo publishing house, 10, C
7. From Hugh Chisholm, 10, C
7. From Paul Ehrenfest, 10, 191
7. From Gerrit Mannoury, 10, C
7. From Edgar Meyer, 10, 192
after 7. To Edgar Wöhlisch, 10, 193
8. To Jolan Kelen-Fried, 10, 194
8. To Carl Runge, 10, 195
9. To Vieweg publishing house, 10, C
9. From Friedrich Adler, 10, 196
9. From Otto Bauer, and Sigmund Kunfy, 10, C
9. From Mario Basto Wagner, 10, 197
10. To Stefan Zweig, 10, 198
10. From Friedrich Schmidt-Ott, 10, C
11. From Georg Count von Arco, 10, 199
11. From Paul Hertz, 10, 200
11. or 11 Sep From Emil Ludwig, 10, C
12. To Vilhelm Bjerknes, 10, 201
12. From Jolan Kelen-Fried, 10, 202
13. From Paul Kronthal, 10, C
14. To John G. Hibben, 10, 203
14. To Hugo Lieber, 10, 204
15. To Wilhelm Matthies, 10, C
15. From Otto von Baeyer, 10, C
15. From Gustav Roethe, 10, C
16. To Hans Rahm, 10, C
16. To Hugo Seemann, 10, C
18. To Prussian Academy of Sciences, 10, C
18. From Konrad Sannig & Co., 10, C
18. From Vieweg publishing house, 10, C
19. To Minna Cauer, 10, 205
19. From Encyclopaedia Britannica, 10, C
19. From Fritz Haber, 10, C
20. From Marcel Grossmann, 10, 206
22. From Wolfgang Ostwald, 10, C
22. Augustus Trowbridge to Heike Kamerlingh Onnes, 10, 207
after 22. To Wofgang Ostwald, 10, C
23. From Heike Kamerlingh Onnes, 10, 208
23. From Methuen publishing house, 10, C
24. From Allgemeine Studenten-Vertretung, 10, C
24. From Felix Ehrenhaft, 10, C
24. From Harry Schmidt, 10, C
25. From Victor Kopp, 10, C
26. To Paul Ehrenfest, 10, 209
27. To Augustus Trowbridge, 10, 210
28. To Edgar Meyer, 10, 211
28. From Hans Albert Einstein, 10, 212
28. From Herbert Fischer, 10, C
28. From Walther Nernst, 10, 213
28. From Harry Schmidt, 10, C
28. From Hugo Seemann, 10, C
after 28. To Herbert Fischer, 10, C
29. To Felix Ehrenhaft, 10, C
29. From Willem de Sitter, 10, 214
30. To Encyclopaedia Britannica, 10, C
30. From Jeanne Rouviere, 10, C

December
?. From Wander de Haas, 10, 215
1. To Hans Mühsam, 10, 216
1. From Arnold Berliner, 10, 217
1. From Paul Winteler, 10, 218
2. To Harry Schmidt, 10, 219
2. From Max von Laue, 10, C
3. To Wiener Urania, 10, C
3. From Harry Schmidt, 10, C
6. From Maja Winteler-Einstein, 10, 220
7. To Kaiser-Wilhelm Institute of Physics, board of trustees, 10, C
7. From Paul Mühsam, 10, 221
before 8. From Heinrich Zangger, 10, 222
8. To Max M. Warburg, 10, 223
8. From Max Born, 10, 224
8. From Paul Ehrenfest, 10, 225
8. From Felix Ehrenhaft, 10, C
8. From Harm H. Kamerlingh Onnes, 10, 226
8. From Robert W. Lawson, 10, C
8. From Methuen publishing house, 10, C
ca. 9. To Paul Ehrenfest, 10, 227
10. To Peter Debye, 10, C
10. To Hugo Seemann, 10, C
10. To Vieweg publishing house, 10, C
10. From Reinhold Fürth, 10, C
11. From Wiener Urania, 10, C
12. To Peter Debye, 10, C
13. From Rudolf Goldscheid, 10, 228
13. From Albert G. Schmedeman, 10, 229
14. To George B. Jeffery, 10, 230
14. From Erwin Freundlich, 10, 231
15. To Hans Albert and Eduard Einstein, 10, 232
15. From Jewish Community of Berlin, 10, C
16. To Edouard Guillaume, 10, 233
16. To Albert G. Schmedeman, 10, 234
16. From David Reichinstein, 10, C
17. From Pickworth E. Farrow, 10, C
18. From Reinhold Fürth, 10, C
18. From Arnold Sommerfeld, 10, 235
18–28. To Arnold Sommerfeld, 10, 236
19. From Hermann Anschütz-Kaempfe, 10, 237
20. To Allgemeine Studenten-Vertretung, 10, C
20. From Peter Debye, 10, C
20. From Wolfgang Ostwald, 10, C
21. From Augustus Trowbridge, 10, C
22. To Jewish Community of Berlin, 10, 238
22. To Methuen publishing house, 10, C
22. To A. J. Reingold, 10, 239
22. From Frederick A. Lindemann, 10, 240
23. From Wilhelm Blaschke, 10, C
23. From Edouard Guillaume, 10, 241
23. From Albert G. Schmedeman, 10, 242
24. From Allgemeine Studenten-Vertretung, 10. C
24. From John G. Hibben, 10, 243
24. From Springer publishing house, 10, C
24–27. From Michele Besso, 10, 244
26. To Allgemeine Studenten-Vertretung, 10. C
28. To Ernest Pickworth Farrow, 10, 245
28. To Ayao Kuwaki, 10, 246
28. To Peter Debye, 10, C
28. From Hermann Anschütz-Kaempfe, 10, 247
28. From Carl Beck, 10, 248
28. From Hedwig Kohn, 10, C
29. To Wilhelm Blaschke, 10, 249
29. To Edouard Guillaume, 10, 250
29. To Mario Basto Wagner, 10, 251
29. From Gustav Roethe, 10, C
29. From Arnold Sommerfeld, 10, 252
30. From Jewish Community of Berlin, 10, 253
30. From Methuen publishing house, 10, C
after 30. To Methuen publishing house, 10, C
31. From Springer publishing house, 10, C