A Collection of Scarce and Valuable Treatises Upon Metals, Mines and Minerals, in Four Parts. Part I and II, Containing the Art of Metals, Written Originally in Spanish by the Learned Albaro Alonso Barba,... Translated by the Earl of Sandwich in the Year 1669. Part III, Containing that Invaluable Piece of Mr. G. Plattes, Viz. a Discovery of All Sorts of Mines from Gold to Coal. Part IV, Houghton's Compleat Miner PDF Download