Lectionary Calendar
Tuesday, November 4th, 2025
the Week of Proper 26 / Ordinary 31
the Week of Proper 26 / Ordinary 31
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Bible Encyclopedias
Copperas
1911 Encyclopedia Britannica
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(Fr. couperose; Lat. cupri rosa, the flower of copper), green vitriol, or ferrous sulphate, FeSO 4.7H 2 0, having a bluish-green colour and an astringent, inky and somewhat sweetish taste. It is used in dyeing and tanning, and in the manufacture of ink and of Nordhausen sulphuric acid or fuming oil of vitriol (see Iron).
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These files are public domain.
These files are public domain.
Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Copperas'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/c/copperas.html. 1910.
Chisholm, Hugh, General Editor. Entry for 'Copperas'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/c/copperas.html. 1910.
