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Thursday, August 21st, 2025
the Week of Proper 15 / Ordinary 20
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Bible Encyclopedias
Speculum

1911 Encyclopedia Britannica

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the Latin word for a mirror, employed more particularly for a metallic mirror used in a reflecting telescope. In early instruments metallic mirrors, made from an alloy of copper and tin, with the addition of a little arsenic or other metals to increase the whiteness, were customarily employed, but they have now been displaced by the more converiient silveron-glass mirror (see Telescope). Various forms of specula are used in surgery for examining internal organs.

Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Speculum'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​s/speculum.html. 1910.
 
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