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Definition of Bone-ash cup
1. Noun. A small porous bowl made of bone ash used in assaying to separate precious metals from e.g. lead.
Lexicographical Neighbors of Bone-ash Cup
Literary usage of Bone-ash cup
Below you will find example usage of this term as found in modern and/or classical literature:
1. Methods in Metallurgical Analysis by Charles Henry White (1920)
"By cupellation, the lead button containing the gold and silver is melted on a
bone ash cup called a cupel (Fig. 83), the lead is oxidized to PbO, ..."
2. Pomeroy's Mining Manual for Prospectors, Miners and Schools: Showing where by Henry R. Pomeroy (1881)
"Cube—It is a body having six equal square sides, with equal angles, Cupel—A small
bone-ash cup used by assayers. Cut—Where a mineral vein is intersected, ..."
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