C A L E N D A R O F A B S T R A C T S J U N E 1 9 2 7 8 0 5 15. From Heinrich Tichauer Berlin, 10 June 1927 Has been working for seven years on an invention pertaining to a wing flying machine capable of starting and landing perpendicularly. Is unable to afford the construction of a model. Requests AE’s assistance. ALS. [48 569]. 16. From Léon Lichtenstein Leipzig, 11 June 1927 Recommends A. Wintner from Budapest, for whom he requests assistance. Although Wintner has published in reputable journals, he was unable, as a Jew, to receive his dis- sertation. ALS. [47 440]. 17. To the Prussian Academy of Sciences Berlin, 13 June 1927 Referee report on a completely useless submission by Hitz on the law of gravitation. ADS. [97 003]. 18. From Emil Julius Gumbel Heidelberg, 13 June 1927 Requests recommendation for possible academic position in Santiago, Chile, to be sent to Prof. M. Brockmann. ALS. [46 498]. 19. From Franz Xaver Schmidt Baden bei Wien, 13 June 1927 Wishes to know whether the theory of gravitation can be checked with experiments on centrifugal force field. TLS. [25 260]. 20. From Raschko Zaycoff Charlottenburg, 14 June 1927 Promises to return the 190 M loan received from AE, as well as money owed to Szilard, by 1 October, after spending next summer in Sofia, where he will certainly marry a wealthy spouse. Encloses papers by G. Maneff, dean at the University of Sofia, for pos- sible publication. Even though Maneff is critical of AE’s work, believes he deserves a hearing. ALS. [24 181]. 21. To Franz Xaver Schmidt Berlin, 15 June 1927 In reply to Abs. 19, explains that the theory can be checked only by experiments with real gravitational fields. TLC. [25 261]. 22. To Wolfgang Windelband Berlin, 15 June 1927 In reply to Abs. 4, finds it difficult to answer whether Senftleben is entitled to a profes- sorship, which depends on the achievements of the other candidates. He masters his field of experimental optics, and his publications evince a certain independence and relia- bility. TLC. [48 299]. 23. From K. de Boer Beelitz-Heilstätten, 15 June 1927 Sends a manuscript somewhat related to a variant of the “Einstein effect,” and requests AE’s opinion. ALS. [45 631]. 24. To Emil Julius Gumbel Berlin, 18 June 1927 Attaches the recommendation requested in Abs. 18 (see Doc. 9). TLC. [46 499]. 25. From S. Philipson Munich, 19 June1927 Sends his considerations on economic crises and requests AE’s opinion. ALS. [47 867]. 26. From Karl Weissenberg Berlin-Dahlem, 20 June 1927 Forwards page proofs of a paper by V. Conrad, Vienna, who has requested that AE con- tribute an article on this topic to Gerlands Beiträge zur Geophysik. ALS. [45 771]. 27. From Raschko Zaycoff Berlin, 21 June 1927 Is responding to AE’s comment during their recent encounter at the Institute of Physics that Zaycoff is “unanständig” (indecent, improper) in reply to his question regarding the possibility of publishing G. Maneff’s papers. Requests an immediate reply or the return of Maneff’s work. TLC. [24 182].