D O C U M E N T 3 9 9 A P R I L 1 9 2 0 5 3 7
TLC. [44 631]. Addressee’s name is typed above salutation: “Herrn Dr. Paul Oppenheim Frankfurt
In Doc. 394.
Edouard Guillaume had written to Einstein about his critique of relativity in Doc. 280 (see
Varcollier 1918 is a report on the theory of relativity which contrives not to mention Einstein.
Fabre planned to publish a popular treatment of relativity for a prominent French journal (see
In early April, Maurice Solovine had inquired about the feasibility of writing a popularization
of the general theory of relativity in French, not a translation of Einstein 1917a (Vol. 6, Doc. 42). See
Doc. 372. On 24 April, Gaston Moch had approached Einstein with a request of translating the work
(see entry for this date in Calendar), which Einstein politely postponed in his reply a few days later
(see entry of 30 April in Calendar) on the grounds that an “impecunious friend” (Solovine) already
owned a “moral right” to the translation.
Solovine’s financial straits were well-known to Einstein from their days together in Bern (see Ein-
stein to Maurice Solovine, 27 April 1906 [Vol. 5, Doc. 36]). Solovine was nicknamed “v. Insolvini”
by the fellow members of the Olympia Academy (see Einstein and Maurice Solovine to Conrad Ha-
bicht, 14 December 1909 [Vol. 5, Doc. 191]).
Jeanne Rouvière and Emile Borel had also already proposed a translation of Einstein 1917a
(Vol. 6, Doc. 42) on 23 February (see entry for this date in Calendar), to which Einstein had given his
preliminary consent (see entry of 8 March in Calendar).
Weyl 1918b; Hermann Weyl.
Einstein had agreed to speak to the literary club of the Frankfurter Gesellschaft für Handel, Indu-
strie und Wissenschaft upon Oppenheim’s invitation (see Oppenheim to Elsa Einstein, entry of
5 March, and Einstein’s correspondence with Georg Swarzenski, entries of 14 April and after 14 April
To lecture at the University of Christiania (Oslo), at the invitation of the Norwegian Students’
Gabriella Oppenheim-Errera; father Moritz Nathan Oppenheim and his wife, Katharina née
Edle von Kuffner (1862–1933).