The Einstein Papers Project was established in 1986 to assemble, preserve, translate and publish papers selected from the literary estate of Albert Einstein (more than forty thousand documents) and from other collections (more than fifteen thousand Einstein-related documents). In the first two decades of the Einstein Papers Project, the Princeton University Press has published ten of the projected twenty five volumes in the series, The Collected Papers of Albert Einstein. Introductions, headnotes, footnotes, etc., are provided in English, while all documents in the series are reproduced in the language in which they were originally written. The Press simultaneously publishes English translations of previously untranslated documents when it releases each volume in the series. This volume presents important new material on the young Einstein. It includes many previously unpublished documents, e.g. class notes for Heinrich Friedrich Weber's lectures on thermodynamics and electromagnetism during Einstein's second year at ETH Zurich, etc. Published by Princeton University Press