3 9 4 D O C U M E N T 3 9 9 D E C E M B E R 1 9 2 4
would be so good as to relay our invitation to such French mathematicians he be-
lieves would accept such an invitation, or would be amenable to consider accep-
Over here Geiger and Bothe performed a very interesting experiment. They find
that in the Compton effect, the deflection of the X-ray (or the secondary ionization
corresponding to it) and the flinging off of the electron are simultaneous processes.
Thus they refute the statistical theory (Bohr-Kramers-Slater), which accords the
energy-momentum theorem only statistical validity. The paper is not definitively
completed, by the way, but the authors no longer doubt this to be their
Greetings to you, your family, and Mrs. Curie and
with sincere
fondness from your
A. Einstein.
399. To Hendrik A. Lorentz
Berlin, 16 December 1924
Dear esteemed Prof. Lorentz,
Professor Thirring recently sent me a letter (copy), in which he reported to you
about the position of local physicists on the matter of
His report was in
accord with the truth, and yet I believe I can assure you today that a turn for the
better has partly already happened, and is partly in the process of happening. The
most influential leaders of men of science
[do not laugh about it, but here
men of science are presented as needing leadership and being led.—In honor of the
truth.] now view the international efforts and methods with more understanding
and trust, as I was able to convince myself from conversations. We just have to have
patience and allow time to do its work.
Unfortunately, a hard-boiled man of little insight is at the head of the Society for
Practical Physics [Gesellschaft für Praktische Physik], which makes this specific
affair (journal reviews) somewhat more
I recently spoke once again with Planck about the national
He was
a bit helpless and said neither yes nor no. He had no proper notion of our goals and
thought that fraternization assurances had no real value. I explained to him then that
the committee was there to solve real tasks and mentioned a few of them to him. I
also said to him that the national committees were organs of the Central Commit-
tee, which was supposed to create a link between scholars and scholarly corpora-
tions of the individual countries. In my view, the moment has now come in which
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