CALENDAR 1920 5 9 1
with a lecture on relativism. Sends copies of two lectures.
August 13 1-page ADft reply on the verso of Julio Rey Pastor’s letter
of 5 August, in Calendar. On 13 August he recommended
Spanish edition of Einstein 1917a to Vieweg; 15% of store
price should be requested, of which 10% for himself and 5%
for Vieweg. [44 768].
August 14 1-page ALS from Ernst Wagner. Exceeded the 10,000 M
granted by KWIP for a high-voltage battery by 200 M, and
requests additional 1,500 M to counterbalance further price
increases. GyBP, I. Abt., Rep. 34, Nr. 11, Mappe Wagner.
August 15 1-page TrLC to Allgemeine Studenten-Vertretung an der
Technischen Hochschule Dresden. Accepts invitation of 4
August. He will be away from Berlin from 10 September to
end of October. [43 582.2].
4-page ALS from Bernardo Dessau. Requests information
on the character of education at the newly opened Technion,
Haifa, with the prospect of leaving his present position at
the University of Perugia and settling in Palestine. [9 175].
ALS to the Secretary of Columbia University. Confirms
receipt of the Barnard Medal via the Swiss Legation in Ber-
lin and comments on its “beauty and elegance.” NNC, Cen-
tral Files, 88/16. [91 172].
August 16 4-page TLS from Walter Dällenbach. Writes about the case
of a rotating magnet in relativity theory, seeking clarifica-
tion on Einstein’s discussion of this problem in an earlier
letter to Michele Besso (Doc. 85). Finds it difficult to dis-
cuss intuitive problems such as this one with Weyl and has
not yet met Peter Debye. Criticizes Henri Poincaré’s calcu-
lation of the electric field of a rotating magnet and intends to
send a notice about this to the Annalen der Physik. Has lec-
tured on Maxwell’s theory at the ETH and is grateful to Ein-
stein for his advice to take up practical work (Vol. 9,
Doc. 112). Is puzzled about Einstein’s measuring rod objec-
tion to Weyl’s unified field theory. Sees something anthro-
pocentric in Einstein’s emphasis on real measuring rods.
Wonders whether atomic radii and frequencies would not be
better than rods and clocks. In this context he remarks upon