bn:01240075n
Noun Concept
Categories: California Gold Rush, Chemical tests, Gold rushes
EN
acid test  Acid tests
EN
An acid test is a qualitative chemical or metallurgical assay utilizing acid. Wikipedia
English:
Gold
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EN
An acid test is a qualitative chemical or metallurgical assay utilizing acid. Wikipedia
A chemical or metallurgical test that uses acid, now also a general term for verified, approved, or tested in a large number of fields Wikipedia Disambiguation
any qualitative chemical or metallurgical assay which uses acid; most commonly, and historically, the use of a strong acid to distinguish gold from base metals Wikidata
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