18 inch repeating circle

Made:: 1790-1826 in London

maker:: Edward Troughton

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

Details

Category:: Astronomy

Object Number:: 1909-206

type:: astronomical measuring instruments and repeating circles

credit:: British Admiralty

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18 inch repeating circle

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