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Cupellation Collection

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Cupellation Collection: Refining copper using the Hungarian process, 1683

Refining copper using the Hungarian process, 1683. Copperplate engraving showing cupellation cakes being roasted, releasing lead. The lead obtained is smelted at top left

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Cupellation Collection: Using bellows to increase the draught in a furnace, 1540

Using bellows to increase the draught in a furnace, 1540. Woodcut showing a workman using bellows to increase the draught in a furnace for refining copper

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