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Definition of Cupel
1. Noun. A small porous bowl made of bone ash used in assaying to separate precious metals from e.g. lead.
Definition of Cupel
1. n. A shallow porous cup, used in refining precious metals, commonly made of bone ashes (phosphate of lime).
2. v. t. To refine by means of a cupel.
Definition of Cupel
1. Noun. A small circular receptacle used in assaying gold or silver with lead. ¹
¹ Source: wiktionary.com
Definition of Cupel
1. to refine gold or silver in a cuplike vessel [v -PELED, -PELING, -PELS or -PELLED, -PELLING, -PELS]
Lexicographical Neighbors of Cupel
Literary usage of Cupel
Below you will find example usage of this term as found in modern and/or classical literature:
1. Practical Dental Metallurgy: A Text and Reference Book for Students and by Joseph Dupuy Hodgen, Guy Stillman Millberry (1918)
"The ash should not be too fine or packed too densely, or the cupel will lack
porosity; nor should it be too coarse or too loosely ..."
2. The Sampling and Assay of the Precious Metals: Comprising Gold, Silver by Ernest Alfred Smith (1913)
"63 are used, a cupel of a given diameter will absorb a larger weight of lead than
that given above for a cupel of the same diameter of the shape shown in ..."
3. A Treatise on Metallurgy: Comprising Mining, and General and Particular by Frederick Overman (1855)
""When a muffle cannot be obtained, a large crucible 'may be set in a furnace and
serve the same purpose ; or if no cupel furnace can be had, a cupellation ..."
4. The Metallurgy of Gold by Thomas Kirke Rose (1906)
"Examination of the cupel.—When rich ores are assayed, appreciable quantities of gold
... To assay the cupel, all clean bone-ash is detached and thrown away, ..."
5. The Metallurgy of Gold by Thomas Kirke Rose (1898)
"Examination of the cupel.—When rich ores are assayed, appreciable quantities of
... To assay the- cupel, all clean bone-ash is detached and thrown away, ..."
6. International Library of Technology: A Series of Textbooks for Persons by International Textbook Company (1908)
"For this purpose .2 g. of pure silver should be mixed with 20 g. of lead in a
cupel and placed in the muffle. The loss in silver should not exceed 2 per ..."
7. Metallurgy: The Art of Extracting Metals from Their Ores by John Percy (1880)
"ESTIMATION OF THE SILVER IN THE cupel. Absorption by the cupel. — The small
quantity absorbed by the cupel need only be estimated when great exactness is ..."
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