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Title: Airy's Reflex Zenith Tube, 1851, made by Troughton and Simms [Go to resource]
Description: Airy's Reflex Zenith Tube, 1851, made by Troughton and Simms License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: zenith telescope Temporal: 1851 Source: Science Museum Creator: Troughton & Simms Identifier: 1937-692 Go to resource More Like this...
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