Astronomy, Astronomical instruments, repeating circle without reflection, by Troughton
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"Astronomical Instruments"
"The repeating circle without reflection by Troughton"
Copper engraving by Lowry after J. Farey dated 1820. Published in London.
Light browning on margin edges.
Page size: 26.5 x 21 cm ( 10.4 x 8.2 ")