LIST OF TEXTS x v
50. To Johannes W. Classen, 17 February 1921
51. To Eduard Schweigler, 17 February 1921
52. From Max M. Warburg, 18 February 1921
53. To John G. Hibben, 21 February 1921
54. From Vladimir M. Chulanovsky, 21 February 1921
55. From Paul Ehrenfest, 21 February 1921
56. To Arthur T. Hadley, 22 February 1921
57. To Hendrik A. Lorentz, 22 February 1921
58. To Wilhelm Wirtinger, 22 February 1921
59. From Otto Neurath, 22 February 1921
60. To Carl Beck, 23 February 1921
61. From Lucien Fabre, 23 February 1921
62. From Gilbert N. Lewis, 23 February 1921
63. From Chaim Weizmann, 23 February 1921
64. To Theodor Wulf, 25 February 1921
65. From Paul Oppenheim, 25 February 1921
66. From Central Association of German Citizens of the Jewish Faith,
27 February 1921
67. From Nathan Ratnoff, 27 February 1921
68. From Paul Ehrenfest, 28 February 1921
69. From Maurice Solovine, 28 February 1921
70. From Chaim Weizmann, 28 February 1921
71. To Paul Ehrenfest, 1 March 1921
72. To Romain Rolland, 1 March 1921
73. From Erich Marx, 2 March 1921
74. From Malwin Warschauer, 2 March 1921
75. To Erich Marx, 3 March 1921
76. To Otto Neurath, 3 March 1921
77. To Otto Neurath, 3 March 1921
78. From Paul Epstein, 4 March 1921
79. From Wilhelm Wirtinger, 4 March 1921
80. From Jakob Grommer, 5 March 1921
81. To Alfred Kerr, 7 March 1921
82. From Rudolf Goldschmidt, 7 March 1921
83. To Paul Ehrenfest, 8 March 1921