Engraving depicting a gravity driven clock: a short cylinder with a dial at one end travels down an helical path. The pointer shows the fractions of an hour on the dial and the hour itself is indicated on the helix. Dated 18th century

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Size: 4000px × 5243px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1719, 18th, archival, archive, century, clock, cylinder, dial, driven, engraved, engraving, force, gravity, helical, helix, historical, history, illustrated, illustration, path, print, printed, time, timepiece