Mineralogia cornubiensis : a treatise on minerals, mines, and mining : containing the theory and natural history of strata, fissures, and lodes, with the methods of discovering and working of tin, copper, and lead mines, and of cleansing and metalizing their products, shewing each particular process for dressing, assaying, and smelting of ores : to which is added, an explanation of the terms and idioms of miners /