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Description: | 18 inch repeating circle, by Troughton, engraved F5TO, 3 eyepieces 3 dark glasses, 1 plumb bob, 4 brass clips, 2 brass labels with chains, instrument is exhibited on stand with 3 levelling screws, circles are divided into twelths of a degree and read to 5" arc by vernier | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Subjects: | repeating circles astronomical measuring instruments | Temporal: | 1790-1826 | Source: | Science Museum | Creator: | Troughton, Edward | Identifier: | 1909-206 | Go to resource |
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