Equinoctial Ring Sundial by Henry Sutton

Equinoctial Ring Sundial by Henry Sutton

Usage conditions apply
This brass universal equinoctial ring dial consists of a meridian ring, hour ring, rotating crosspiece or bridge, and sliding suspension ring/handle. The meridian ring is calibrated on one side from 0 to 90 by single degree. The hour ring is calibrated on one side from I to XII twice. Half-hour divisions are along the inside edge of the hour ring. The bridge contains a sliding pinhole gnomon. The gnomon slides within a calendar scale calibrated and lettered by month on one side and scales from 20 to 0 to 20 and from 0 to 20 on the opposite side (declination scales). Both sides of the meridian ring and the verso of the hour ring are engraved with a list of forty-five European towns and latitudes, the majority being English. Henry Sutton (d. 1665) was a London instrument maker with numerous apprentices.
Currently not on view
Object Name
Sundial, Equinoctial
Henry Sutton
Sutton, Henry
place made
United Kingdom: England, London
Physical Description
brass (overall material)
overall:.7 cm x 10.8 cm x 14.7 cm; 9/32 in x 4 1/4 in x 5 25/32 in
ID Number
accession number
catalog number
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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