Licht, Waerme, Strahlen / Magnetismus, Elektrizitaet, Induktion / Daemonen und Geister
Page from an Einstein Manuscript
Fundamental Ideas and Methods of the Theory of Relativity Presented in their Development, January 1920, reproduction
Einstein describes the heuristic principles that led him to the Special and General Theories of Relativity.
Written for the journal Nature, but subsequently withdrawn and not published.