File:Voyage in Space page055.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:39, 19 December 2015 | 1,764 × 1,548 (84 KB) | Keith Edkins | {{Information |Description={{en|1=A rangefinder. A B observer's eyes. C D lenses. G H swiveling mirrors. J K fixed mirrors.}} |Source=A Voyage in Space[https://archive.org/details/voyageinspacecou00turnrich]. |Author=Herbert Hall Turner |Date=1913 |Pe... |
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