Refining of silver, in Prague in 1574. Copperplate

Refining of silver, showing (2) a test put into the furnace and (3) burning the silver in a test. A test warming (8) and a roaster for making burnt silver dry (9). From 1683 English edition of Lazarus Ercker Beschreibung allerfurnemisten mineralischen Ertzt- und Berckwercksarten originally published in Prague in 1574. Copperplate engraving

1574 1683 Allerfurnemisten Berckwercksarten Beschreibung Burnt Ercker Ertzt Furnace Lazarus Mineralischen Refining Roaster Warming

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