39
39
UNIVERSAL EQUINOCTIAL RING DIAL BY BENJAMIN COLE, LONDON, CA 1850.
SIGNED "COLE, LONDON."
Estimate
6,0008,000
LOT SOLD. 6,000 USD
JUMP TO LOT
39
UNIVERSAL EQUINOCTIAL RING DIAL BY BENJAMIN COLE, LONDON, CA 1850.
SIGNED "COLE, LONDON."
Estimate
6,0008,000
LOT SOLD. 6,000 USD
JUMP TO LOT

Details & Cataloguing

History of Science & Technology, Including the Nobel Prize and Papers of Richard P. Feynman

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New York

UNIVERSAL EQUINOCTIAL RING DIAL BY BENJAMIN COLE, LONDON, CA 1850.
SIGNED "COLE, LONDON."
A 4-inch diameter universal equinoctial ring dial in brass, with suspension ring, sliding pinhole gnomon with calendrical scale to one side, and zodiacal scale to the other; upper scale engraved with latitudes for both Northern and Southern latitudes; chapter ring engraved with 24 hours (I-XII, and I-XII); equinoctial ring with declination scale to one side and degree scale to other (90°-0°-90°).
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Catalogue Note

A WONDERFUL MID-18TH CENTURY UNIVERSAL EQUINOCTIAL DIAL. Also known as a "Traveler's sundial", these clever instruments would be suspended from a cord, with the suspension point on the meridian ring set to the local latitude. The center bar is then set until a ray of light passes through a small hole, and falls on the equatorial ring, indicating the time of day. 

History of Science & Technology, Including the Nobel Prize and Papers of Richard P. Feynman

|
New York