634 CHRONOLOGY, JULY-NOVEMBER 1913 July 24 July 31 August 4 August 7 September 9 mid-September September 23 September 24- October 9 October 2 before October 21 October 27-31 after November 5 The plenum of the Prussian Academy votes on the Ein- stein nomination, with 44 in favor and 2 dissenting. Receives 15 Swiss francs for examining three students for the Schlussdiplomprüfung at the ETH. Provenance: SzZE Schulratsarchiv 1913, Protokoll des Präsidenten des Schweizerischen Schulrates, no. 344. Registers in guestbook of Hotel Schweizerhof in Flims, at the beginning of a walking tour with Marie Curie through the Engadine and the Val Bregaglia in eastern Switzerland. The summer semester at the ETH ends. Lectures to the Frauenfeld meeting of the Schweizer- ische Naturforschende Gesellschaft on the "Physical Foundations of a Theory of Gravitation" (Vol. 4, Doc. 16). Visits wife's family in IJjvidek (now Novi Sad). Delivers lecture "On the Present State of the Problem of Gravitation" to the Vienna meeting of the GDNA (Vol. 4, Doc. 17) and participates in the discussion (Vol. 4, Doc. 18). Visits Berlin, Heilbronn, and Ulm before returning to Zurich. The winter semester at the ETH begins: Einstein teaches courses in electricity and magnetism (Vol. 4, Doc. 19), and on ray optics and diffraction, while con- ducting a physics seminar and supervising exercises in physics (with Pierre Weiss). Writes "Theoretical Atomistics" and "Relativity The- ory" for Die Kultur der Gegenwart in one week, after being reminded by Emil Warburg while in Berlin of the due date. The articles are published in 1915 (Vol. 4, Docs. 20 and 21). Participates in a discussion on papers delivered at sec- ond Solvay Congress (Vol. 4, Doc. 22). Grants power-of-attorney to the attorneys E. Sulzer and O. Rascher in the case of F. Gentner-Aichroth vs. Ein- stein, which involves a rental dispute. November 7 "Max Planck as Scientist" (Vol. 4, Doc. 23).