Important scientific manuscript written in the hand of Albert Einstein in German, unsigned, one page, 8.5 x 11, no date but circa 1929. A draft variant of a page of scientific equations written by Albert Einstein, annotated on the reverse in pencil in another hand: "Apparently a study for 'Zur Einheitlichen Feldtheorie.'" Amidst a series of equations, he writes a few lines in German (translated): "for ξ [illegible] of the X4 large spherical surface theorem"; "If we assume a static field, then the lastā¦disappears [struck through] Let the field be static"; "Let us select the boundaries of the integration domain"; and "Particular case." In fine condition.
By 1929, Einstein had solved the main problems he had faced in writing field equations for his unified field theory; this 'united field' theory would be a generalization of his gravitational theory, including all electromagnetic phenomena. His 'Zur Einheitlichen Feldtheorie [On the Unified Field Theory]' was one of his last important scientific works.
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