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.Mine Pumping in Agricola's Time and Later by Robert P. MulthaufAuthor: Multhauf, Robert P., 1919-2004,Language: English, Class: TN: Technology: Mining engineering, Metallurgy, Release Date: Jan 20, 2010