1820 engraving, "The English Reflecting Circle by Troughton."
From Rees's Cyclopædia, or The New Cyclopædia, or, Universal Dictionary of the Arts and Sciences, edited by Reverend Abraham Rees (1743-1825). Reflecting instruments are those that use mirrors to enhance their ability to make measurements.
Size: 6992px × 7015px
Photo credit: © Old Paper Studios / Alamy / Afripics
License: Licensed
Model Released: No
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