Assay laboratory for gold and silver. 1) Furnace: 2) Sheet of iron onto which assays are poured: 3) Parting flask: 5) Assay by water displacement. From 1683 English edition of Lazarus Ercker Beschreibung allerfurnemisten mineralischen Ertzt- und Berckwercksarten originally published in Prague in 1574. Copperplate engraving.
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Creative#:
TOP09159588
Source:
達志影像
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RM
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須由TPG 完整授權
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