Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and his memory continues to inspire the creation of eBooks and related technologies today.A Text-book of Assaying: For the Use of Those Connected with Mines. by C. Beringer et al.Author: Beringer, J. J. (John Jacob), 1857-1915,Language: English, Class: TN: Technology: Mining engineering, Metallurgy, Release Date: Jul 3, 2006