C A L E N D A R O F A B S T R A C T S 1 9 2 4 8 8 1 460. From Pedro Guesalaga Berlin, 20 October 1924 Acknowledges receipt of the letter dated 24 July. The rector of the University of Buenos Aires has accepted AE’s offer of delivering lectures in April 1925. Will reserve places for AE and Elsa Einstein on the Cap Polonio, which sails from Hamburg directly to Bue- nos Aires on 5 March 1925 and arrives there on the 26th. If AE prefers to set out earlier, he can travel on the Antonio Delfino, which sails on 18 February and arrives on 14 March. TLS. [43 100]. 461. To Lucien Chavan [Leyden, 21 October 1924] Sends regards as an “old pal” to Chavan and his wife. Greetings from Michele Besso and Anna Besso-Winteler in their own hand. (The postcard was written during the meeting of the annual conference of the Schweizerische Naturforschende Gesellschaft in Lu- cerne, but was most likely sent from Leyden). AKSX. [37 573]. 462. From Arnold Berliner Berlin, 21 October 1924 Quotes from a letter by Friedrich Klein that mentions that AE published a paper oppos- ing Kant (Einstein 1924n [Doc. 321]) and requests that Berliner solicit an extensive pa- per on the same topic from Einstein or someone else for the Naturwissenschaften. TLS. [7 019]. 463. Ilse Kayser-Einstein to Gustav Bornscheuer Berlin, [22] October 1924 In reply to Abs. 439, recommends reading pp. 1–31 of the first volume of Laue 1921. TLC. [43 327]. 464. From Alfred Holländer Prague, 22 October 1924 On the recommendation of Karl Scheel, sends his paper on a theory of mass attraction in which he attributes gravitation not to the mass but to a special cause. Requests expert opinion. ALS. [43 941]. 465. From Joseph Feldmann Paderborn, 23 October 1924 Requests permission to insert 4–5 pages from Einstein 1921c in the manuscript of Feld- mann 1925, and help in selecting the proper text. AKS. [43 667]. 466. From Fritz Genewein Munich, 23 October 1924 Was very pleased to see AE on 24 September after twenty-eight years. Thanks for the photo. Reminisces on their time when they were classmates in Munich, including AE’s initial study of Kant’s Kritik der reinen Vernunft. ALS. [43 740]. 467. From José Arce and Mauricio Nirenstein Buenos Aires, 23 October 1924 Is pleased that AE will be leaving for Rio de Janeiro the following March. Pedro Gue- salaga has assumed responsibility for booking passages for AE and wife (see Abs. 460). The universities of Buenos Aires, Córdoba, La Plata, and Tucumán jointly offer an hon- orarium of $4,500 in Argentine currency. AE may choose the number of lectures deliv- ered. Attached to Abs. 522. TLS. [43 103]. 468. From Teubner Publishing House Leipzig, 23 October 1924 Reminds AE of Abs. 363 and urges him to send the revised manuscripts of Einstein 1915a and 1915b. TLS. [41 1101]. 469. From Georges Oprescu Geneva, 24 October 1924 Will probably visit Berlin next month to collect information on the German intellectual scene for the Bulletin Renseignements Universitaires. Would be happy to meet with AE. TLS. [34 906].