Lectionary Calendar
Monday, December 23rd, 2024
the Fourth Week of Advent
the Fourth Week of Advent
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Bible Encyclopedias
Wad
1911 Encyclopedia Britannica
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a black, earthy mineral consisting mainly of hydrated manganese dioxide; of importance as an ore. Being an amorphous substance, it varies considerably in chemical composition, and contains different impurities often in large amount. A variety containing much cobalt oxide is called "asbolite," while "lampadite" is a cupriferous variety. It is very soft, readily soiling the fingers, and may be considered as an earthy form of psilomelane. It results from the decomposition of other manganese minerals, and is often deposited in marshes ("bog manganese") or by springs. The name wad is of uncertain origin, and has been applied also to graphite. (L. J. S.)
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These files are public domain.
These files are public domain.
Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Wad'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/w/wad.html. 1910.
Chisholm, Hugh, General Editor. Entry for 'Wad'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/w/wad.html. 1910.
