D O C U M E N T S 8 9 , 9 1 M A R C H 1 9 2 1 7 3
89. To Arnold Sommerfeld
[Berlin,] 9 March 1921
Dear Sommerfeld,
To my dismay I learned today from W.
Wien[1]
that my last letter to you got
lost.[2]
In it I offered to come to Munich sometime in June (if you really do still
want it). The offer still stands. I also said then that I could not share Herzfeld’s
opinion regarding the emission of half of the angular momentum during magnetic
reversal.[3]
At least, certain experiments by Beck speak against
it,[4]
according to
which bundles of isolated wires act like massive rods. In any event, we may await
in suspense the outcome of Herzfeld’s experiment. I found a kind of supplement to
the foundations of general relativity that is related to Weyl’s but differs from it in
that the ’s only occur as electric field strengths ; whether this busi-
ness is physically worth anything is doubtful to me, though.[5] The Lord does things
as he pleases and doesn’t follow orders.
I hope you get this letter, so that wrath doesn’t gather over my innocent head!
Best regards, yours,
A. Einstein.
90. From Hans Reissner[1]
Wilmersdorf, 18 Wittelsbacher St., 9 March 1921
[Not selected for translation.]
91. From Chaim Weizmann
London, W.C.I., 77 Great Russell Street, 9 March 1921
Dear Professor,
I received a telegram from America from Judge Mack, president of the Ameri-
can Zionist organization, and Prof. Frankfurter of Harvard University, a member of
the American Zionist leadership, with the information that they are in the process
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