EINSTEIN, ALBERT. AUTOGRAPH LETTER SIGNED ("ALBERT") TO MILEVA EINSTEIN-MARIC, N.P. [BERLIN], 28 JANUARY 1926. 2 PAGES, 4TO, 280 X 220 MM. (11 X 8¾ IN.).

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EINSTEIN, ALBERT. AUTOGRAPH LETTER SIGNED ("ALBERT") TO MILEVA EINSTEIN-MARIC, N.P. [BERLIN], 28 JANUARY 1926. 2 PAGES, 4TO, 280 X 220 MM. (11 X 8¾ IN.).

"THE THEORY OF RELATIVITY HAS NOW BEEN PROVEN EXPERIMENTALLY IN A VERY SATISFYING WAY"

A long letter in which Einstein considers the boys' futures, comments on science as a career and mentions his own work on the theory of relativity and the unified field theory. "The theory of relativity has now been proven experimentally in a very satisfying way. But the problem of the relationship between gravity and electricity is shipwrecked, at least in my view. Theoretical physics is enormously thorny. I am happy that the boys have chosen other paths. I am curious to see what Tete will choose. In any case, one oughtn't to talk to him too much about it, because otherwise he will feel pressed, and he has a delicate nervous system. I remember very well how oppressed I was by thoughts of a future profession, and, after all, it isn't so difficult when one doesn't seek laurels, but, rather, is content with being useful..."

He comments on Hans Albert's engagement to Frieda Knecht: "The business with Albert concerns me greatly. I believe that the girl has him by the neck, but that he is too naive to judge the situation correctly. In any case, we must do all we can to prevent this disaster. Haber's son has just gotten married, but to a fine, intelligent girl from a healthy family."