5 4 D O C U M E N T 3 5 J U L Y 1 9 2 5 . If you suppose that the ’s & ’s are symmetrical, you obtain the old gravita- tion equations for empty space. If you abandon the presupposition of symmetry, you get, to first approximation, the laws of gravity and Maxwell’s field laws for empty space, where the antisymmetric part of the ’s is the electromagnetic field. This really is a magnificent possibility that surely could correspond to reality. Now the question is whether or not this field theory agrees with the existence of atoms and quanta. Macroscopically, I don’t doubt its correctness. If only calculat- ing the specific problems were easier! It’s haunting me for the time being.[4] Don’t be angry and be convinced that I am traveling past your home heavy- heartedly. Warm regards to you and yours from your Albert This letter is being written in the middle of a boring L[eague] of N[ations][5] meeting. 35. To Elsa Einstein [Geneva,] Tuesday [28 July 1925][1] Dear Else, days of meetings are already behind us.[2] The personnel issues of the head of the Paris Institute have been settled. Eisler was not elected, but instead the econo- mist Schulze-Gävernitz.[3] But Eisler was spoken of with deep respect. I advocated for him and informed them about the letters received in his favor. I optimistically hope that he will obtain a position at the Institute, albeit a modest one. Mrs. Curie is not here, nor is Bergson, who is ill.[4] The election of Schulze Gävernitz is good, since he is a “genuine German.” Perhaps I can still visit Mileva, who has again graciously invited me, on Thursday.[5] I spent some time yesterday noontime with Marshall (important American Jew)[6] and spoke to him about the university[7] and other Palestinian matters. That was useful. I had lunch with Lorentz today, with whom I discussed very interesting things, politics and physics.[8] Yesterday, I was at the Inagakis’, who have a sweet little boy, a wonderfully good-looking little ∂Γμν α ∂xα ----------- -– ΓμβΓνα α β .+ © ¹ ¨ ¸ § · Riemann tensor δ( ³gμvRμνdt) 0= gμv Γμν α gμv
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