Zur einheitlichen Feldtheorie

Berlin: Verlag der Akademia der Wissenschaften in Kommission bei Walter de Gruyter, 1929. FIRST EDITION. Original printed orange wrappers; a fine copy, unopened, and bound into morocco-backed cloth boards, spine labeled in gilt. First edition, first issue, in the rare author’s offprint form with a newly set title-page. One of Einstein’s last important scientific works, this publication of the unified field theory caused quite a sensation. It was the first separate printing of one of a series of five papers published between 1925 and 1929 in which Einstein attempted to develop a unified field theory, reconciling in a single formula the laws of electromagnetism and gravitation.

Weil, 165; Printing & the Mind of Man, 418.