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Bausch & Lomb Optical Co.
Pat. Oct. 3, 1876 and Oct 13, 1885
The Universal model microscope fitted with binocular tubes.
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From: Behrens Guide to the Microscope in Botany, 1885
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The Wenham prism on this microscope utilizes a patented mechanism for its mounting as described in the 1884 US patent 293,217.
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