A 6-INCH EQUINOCTIAL RING DIAL
A 6-INCH EQUINOCTIAL RING DIAL

FRANCIS HOWELL, CIRCA 1761

Details
A 6-INCH EQUINOCTIAL RING DIAL
Francis Howell, circa 1761
signed F Howell London also with ownership inscription, possibly in a different hand, Edgar Otley 1761, chapter ring with hours I-XII-I-XII divided to 5 minutes, equinoctial ring with degree scale 90-0-80° and declination scale to reverse, the bridge with sliding pinhole gnomon on calendrical and zodiac scales.
6in. (15.5cm.) diameter

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