| 摘要 |
Device facilitating the assay of gold or other metalsby the method of comparative dissolution with acid. The device comprises a separable holder which contains a plurality of wire supports, each support having a gold wire of a different karat. The wire supports are replacable simply by opening the holder and color coding is used to insure accurate location of the wires. The holder may also retain a file or tester for other metals such as silver.
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