Aperçu gratuit du livre The Assayer's Guide; or, Practical Directions to Assayers, Miners and Smelters, for the Tests and Assays, by Heat and by wet Processes, of the Ores of all the Principal Metals, of Gold and Silver Coins and Alloys, and of Coal, &c. By Oscar M. Lieber ..
The Assayer's Guide; or, Practical Directions to Assayers, Miners and Smelters, for the Tests and Assays, by Heat and by wet Processes, of the Ores of all the Principal Metals, of Gold and Silver Coins and Alloys, and of Coal, &c. By Oscar M. Lieber ..