Substantially from the knowledge of medieval mining techniques originates from books such as Biringuccio's De la pirotechnia and possibly most significantly from Georg Agricola's De re metallica (1556). These guides depth many different mining strategies used in German and Saxon mines. By clicking “Settle for All Cookies”, you conform to https://precious-metals-trading16890.eedblog.com/37889736/5-tips-about-mining-output-you-can-use-today