D O C U M E N T S 4 3 5 , 4 3 6 F E B R U A R Y 1 9 2 5 4 3 1
435. From Theodor Kaluza[1]
Königsberg, Pr., 34 Steinmetz St., 6 February 1925
Highly esteemed Professor,
In the enclosed I permit myself to forward to you an excerpt from my last talk
A student of mine wants to try to elaborate this idea

I myself can devote only little time to physics because my mathematical research
is claiming too much of my efforts, especially since I finally have to try to become
better known through intensive publication and thus perhaps put an end to my un-
satisfactory Cinderella existence here. Additionally, compelled by necessity, I de-
cided to meet with Prof.
at the ministry soon about my future, in order to
obtain, if possible, greater economic security for my family than my current teach-
ing assignment affords; thus it would be extremely valuable to me if I could also
rely on a brief recommendation from you, highly esteemed Professor, so I can also
document my understanding of topics in the boundary fields of mathematical phys-
If the fulfillment of this request should seem possible to you, you would then be
indebting to most earnest gratitude your very devoted
436. To Elsa Einstein
[Leyden,] Tuesday [10 February 1925]
Dear Else,
It was a moving ceremony yesterday, where the blue collar was a great success,
especially among Leyden’s street urchins during the academic
In the
cathedral a well-delivered address was framed by magnificent choruses, and the
queen received the honorary doctorate of
In the evening there was an enor-
mously filling banquet with countless speeches, where I sat between two quite in-
teresting men. I don’t yet know when I’ll be arriving back in Berlin, Saturday morn-
ing at the latest. The Ehrenfests are doing fine. They send greetings. The meeting
in Paris will probably take place only after my departure to South
Best regards to all of you from your
About Eisner, I wrote to the influential man; he lives in
I hope it
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