x x x i v L I S T O F T E X T S 514. To Alice Vanderbilt Morris, 27 April 1929 515. To Maurice Sciaky, after 27 April 1929 516. From Michele Besso, early May 1929 517. To Semen L. Frank, 2 May 1929 518. To Herman Bernstein, 6 May 1929 519. To Herbert C. Hoover, 6 May 1929 520. From Élie Cartan, 8 May 1929 521. “Unified Field Theory,” 10 May 1929 “Einheitliche Feld-Theorie” 522. “Unified Field Theory” [Fragment], 10 May 1929 “Einheitliche Feld-Theorie” 523. To Chaim Herman Müntz, around or after mid-May 1929 524. To Michele Besso, 10 May 1929 525. To Élie Cartan, 10 May 1929 526. On Theater Performances for Prisoners, 11 May 1929 527. To Gustav Böß, 11 May 1929 528. To Michele Besso, 12 May 1929 529. To Attilio Palatini, 12 May 1929 530. From Aurel Stodola, 12 May 1929 531. From Élie Cartan, 15 May 1929 532. “On Arago’s Memorial Lecture for Thomas Young,” 17 May 1929 “Arago, Gedächtnisrede auf Thomas Young” Die Naturwissenschaften 17 (1929) 533. Elsa Einstein to Paul Ehrenfest, 21 May 1929 534. From Cornel Lanczos, 23 May 1929 535. From Norbert Wiener and Manuel Sandoval Vallarta, 23 May 1929 536. From Élie Cartan, 24 May 1929 537. To Chaim Herman Müntz, 27 May 1929 538. Appeal for an Interdenominational Working Group for Peace, 31 May 1929 “Ein deutsches Friedenskartell der Konfessionen” Allgemeine Zeitung am Abend, 31 May 1929 539. From Max Planck, 31 May 1929 540. From Norbert Wiener, 31 May 1929