Refining gold: furnaces, 2,2, and operator, 9. The man near 4 is gradually heating a crucible surrounded by a ring of burning coals: to increase the heat coals were be raked into a smaller circle. From 1683 English edition of Lazarus Ercker 'Beschreibung allerfurnemisten mineralischen Ertzt- und Berckwercksarten' originally published in Prague in 1574. Copperplate engraving.
Refining gold: furnaces, 2,2, and operator, 9. The man near 4 is gradually heating a crucible surrounded by a ring of burning coals: to increase the heat coals were be raked into a smaller circle. From 1683 English edition of Lazarus Ercker 'Beschreibung allerfurnemisten mineralischen Ertzt- und Berckwercksarten' originally published in Prague in 1574. Copperplate engraving.
Size: 2382px × 3042px
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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No
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