CALENDAR 1920 5 8 7
University of Hamburg. Hamburger Nachrichten, 16 and 18
July 1920; Reich 2000.
2-page ALS from Lucien Fabre. Gives contents of his book
(published as Fabre 1921), and requests photos, a list of
more important publications, especially those on Einstein’s
discovery of “dia” rays, the address of Einstein’s French
translator, an intervention with Hermann Weyl to enable a
French edition of his book, as well as a few pages on Ein-
stein’s ideas on science, mathematics, observation, etc. for
the preface. [11 003].
July 19 1-page TLC to Wilhelm Hallwachs. The KWIP funds were
allocated for an electrometer, but he does not object to
spending it on mercury. The mercury will be the property of
KWIP. GyBP, I. Abt., Rep. 34, Nr. 4, Mappe Hallwachs.
1-page TLC to Alfred Magnus (in reply to letter of 11 July,
in Calendar), offers the additional 600 M needed. GyBP,
I. Abt., Rep. 34, Nr. 8, Mappe Magnus. [77 866].
July 20 TgmX to Cornelis van Vollenhoven. Accepts special profes-
sorship in Leyden. [29 301].
1-page TLSX to Cornelis van Vollenhoven. Gratefully
accepts his appointment at Leyden and looks forward to
joining his Dutch colleagues in the fall “as one of their
own.” [29 302].
2-page TLS from Gerhard Hettner. Requests 10,000 M from
KWIP for a grate spectrophotometer and a reflection grating
to be used in a study of infrared spectra of gases. GyBP,
I. Abt., Rep. 34, Nr. 4, Mappe Hettner. [78 077].
July 21 1-page TLC to Santiago R. Cajal. For the time being is over-
burdened with work and cannot lecture this year in Madrid.
Will advise Cajal of the prospects for a future visit.
Fragment of a TL to Landgericht I in Berlin, 16. Zivilkam-
mer: “Anbei erlaube ich.” [19 059].
1-page TLS from Vieweg publishing house. They have nei-
ther the cut block nor the original of Einstein’s portrait men-
tioned in Frau Mally Struck’s card. Gauthier-Villars
accepted the conditions that Einstein set for the French edi-
tion of the 5th (?) edition of Einstein 1917a in his letter of