EINSTEIN, ALBERT.

Zur affinen Feldtheorie.

Berlin, Gruyter & Co., 1923.

4to. Orig. printed orange wrappers. Offprint/Sonderabdruck aus "Sitzungsberichteder Preus...pp. 137-40. Fine fresh copy.

First edition in the rare Offprint (still called "Abdruck"). Weil No. 132 with an asterix, denoting a major work. - Here Einstein gives his first investigation of the "Affine geometries", and introduces the notion of "Distant parallelism".
The early Offprints from "Sitzungsberichten..." are called "Sonderabdruck" up to Weil No.165 (including this). From Weil 166 they are called "Sonderausgabe...". - Before 161 (up to 160) the Offprints do not have separate title and pagination (the pagination follows the numbering in the periodical). From 166 the Offprint has both separate printed title and pagination. - ( So Weil Nos 161-165 is still "Abdruck", but with separate title and pagination). These facts are not mentioned in the bibliographies.

Order-nr.: 28357