Colcothar

Chandler's Encyclopedia · 1898 · p. 21

Ferric oxide, made in the manufacture of Nordhausen sulphuric acid; used for polishing purposes.

Bu kavram başka kaynaklarda da geçiyor

Adair's New Encyclopedia (1923)
The American Dictionary and Cyclopedia (1910)
The American Dictionary and Cyclopedia (1909)
Webster's Condensed Dictionary- A Condensed Dictionary of the English Language (1909)
Chamber's Twientieth Century Dictionary (1908)
An Illustrated Encyclopedic Medical Dictionary (1892)
Zell's Condensed Dictionary (1879)
Dictionary of Science, Literature and Art (1854)

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