8 5 2 C A L E N D A R O F A B S T R A C T S M A Y 1 9 2 8 528. From Armi Inkeri Hallsten-Kallia Geneva, 5 May 1928 In the absence of G. Oprescu, acknowledges receipt of Abs. 527. Welcomes Hugo A. Krüss as AE’s representative. TLS. [34 988]. 529. From Esther Polianowskaja-Salaman Cambridge, 6 May [1928] Offers their home to the Einsteins while they visit Cambridge. “beantw. 10/5, abgeschrieb” appended in AE’s hand. ALS. [48 254]. 530. From Myer Salaman Cambridge, 6 May 1928 Learning that the Einsteins will come to Cambridge in June, offers his father’s home for their visit. ALS. [48 252]. 531. From Antonina Vallentin Berlin, 7 May 1928 Invites AE onto a committee that would arrange for a visit to Germany by prominent English and French intellectuals. Politicians, writers, bankers, scientists will be invited to Berlin to discuss conditions in Germany. TLS. [48 658]. 532. To Otto Blumenthal [Berlin,] 8 May 1928 Attaches a text that is part of another manuscript sent to AE by Ludwig G. Bieberbach. Nothing will come of it, but he cannot take responsibility for it. TLC. [6 112]. 533. To August Nenning [Berlin,] 8 May 1928 Cannot judge the practicality of Nenning’s chemical construction. Returns the news- paper report. TLC. [47 724]. 534. To Ganesh Prasad [Berlin,] 8 May 1928 Apologizes for the late reply to Abs. 422, owing to his travels and illness. Thanks for being elected honorary member of Calcutta Mathematical Society. TLC. [30 229]. 535. To George A. Weekes [Berlin,] 8 May 1928 In response to Abs. 488, regrets being unable to accept the honorary doctorate in person because the physician has forbidden him to travel. Expresses his deep thanks again. TLC. [30 242]. 536. From Albert Dufour-Feronce Geneva, 8 May 1928 Learns from Abs. 519 that AE cannot participate in the ICIC sessions of the year. Wishes full recovery. TLS. [34 989]. 537. From Josef Hertzka Bad Gastein, 9 May 1928 In reply to Abs. 514, emphasizes that he arrived at his numbers not empirically but after a long train of thought. As a physician, fluctuations in metabolic energy in normal infants and genetically strained adults reminded him of [frequency] beats. Law of pro- duction and decay of atoms may play a role here. Some of his findings collected in “Beats as Cause of Birth and Death” were discussed with Felix Auerbach. Asks for fur- ther interest in his findings. ALS. [46 672]. 538. To Albert Dufour-Feronce [Berlin,] 10 May 1928 In reply to Abs. 536, proposes that H. A. Krüss, who represents him both in ICIC and the steering committee of IIIC, be his successor. TLC. [34 990]. 539. To Esther Polianowskaja-Salaman [Berlin,] 10 May 1928 Thanks for the invitation, but because of a severe heart ailment cannot come to Cambridge. Regrets it all the more because P. Ehrenfest mentioned them warmly. TLS. [71 180]. 540. From Max Rubner Berlin, [after 10 May 1928] In its plenary session of 10 May, the PAW decided to issue an appeal to its members that all lectures held during academy meetings be published in the Sitzungsberichte. If a lecture is to appear in another publication, a comprehensive abstract of two to four printed pages is to be submitted instead. TTrL. [45 376].