D O C S . 2 2 2 4 A P R I L 1 9 1 9 1 9
22. To Felix Klein
[Berlin,] 14 April 1919
Dear Colleague,
I am thrilled with your new
paper[1]
like a child who gets a piece of chocolate
from his mother. What you plant squarely on its feet is exactly what is crookedly
limping and lurching every which way with me. Now I am sending you the proofs
of a new paper that again relies far more on physical than on mathematical support,
in that Hamilton’s principle by the same token must be given up.[2] A brief note
with your opinion of it would be of great interest to me.
With cordial regards, yours truly,
A. Einstein.
23. To Emil Zürcher
[Berlin,] 15 April 1919
Dear Dr.
Zürcher,[1]
I am sending you my booklet on
relativity[2]
as well as a small sum of money
that, according to the court decree, still seems to have to be disbursed.[3]
Reliable reports that I could gather about Russia have become so numerous that
further doubt is unfortunately no longer possible. The country is being plundered
by countless minor potentates = leaders of thieving bands that are systematically
shooting all people who do not belong to the lowest class. These bands are recruit-
ing the Chinese to a large
extent.[4]
Fine prospects for us, too! If the Entente were
well directed and farsighted, it would concentrate on keeping Germany somewhat
healthily alive. France should receive damages for the destruction but ought not to
want to capture German
land.[5]
Now is the time to speak out; if one would only
listen.
With cordial greetings, yours,
Einstein.
Best regards to your wife.[6]
24. To Felix Klein
[Berlin,] 16 April 1919
Dear Colleague,[1]
Your paper appealed to me very much.[2] (I can now no longer accept the postu-
late that the energy of gravitation has to be describable by expressions that contain
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