EINSTEIN, A. Die Grundlage der allgemeinen Relativitätstheorie. Lpz., J.A. Barth, 1916 (=1919). 64 pp. Owrps. -- Id. Über die spezielle & die allgemeine Relativitätstheorie. (Gemeinverständlich). 2. Aufl. Braunschweig, 1917. Owrps. (Joint loose, bindwork delicate). -- And 1 o. (3).
Ad 1: Early reprint of the first separate edition of this classic work, in which Einstein first sets out the particular theory of relativity as it applies to the more general case of accelerated systems. The result was a new theory of gravitation, making this one of the most important contributions in the history of physics. The text first appeared in Annalen der Physik, Bd. 49, 1916. - PMM 408.€ 130