2070.4 Michael POTIER. Fons chymicus id est: Vera auri et argenti conficiendi, ex naturalis philosophić venis scaturiens ratio... Philosophia Chymica, id est, methodus genuina auri et argenti solvendi. Francofurti ad Moenum: typis W. Hoffmanni, impendio J.D. Zunneri 1648 British Library