Refining copper by Hungarian process. Cupellation cakes roasted, releasing heat. At 5 lead obtained being smelted. From 1683 English edition of Lazarus Ercker Beschreibung allerfurnemisten mineralischen Ertszt of 1580. Copperplate engraving. Editorial Stock Photo - Afloimages
Refining copper by Hungarian process. Cupellation cakes roasted, releasing heat. At 5: lead obtained being smelted. From 1683 English edition of Lazarus Ercker Beschreibung allerfurnemisten mineralischen Ertszt of 1580. Copperplate engraving.