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Albert Einstein 'On the Unified Field Theory' Booklet

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:200.00 - 400.00 USD
Albert Einstein 'On the Unified Field Theory' Booklet

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Auction Date:2021 Jun 16 @ 18:00 (UTC-5 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Rare unsigned booklet: Zur Einheitlichen Feldtheorie [On the Unified Field Theory]. First edition of one of Einstein's last important scientific works. Berlin: Walter de Gruyter, 1929. Original orange printed wrappers, 7.25 x 10.25, 8 pages. In very good to fine condition, with light handling wear, and toning to the covers. 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.