
John Harrisons First Sea Clock

by Photo Researchers
Title
John Harrisons First Sea Clock
Artist
Photo Researchers
Medium
Photograph - Photograph
Description
John Harrison's first marine timekeeper, 1735. It took self-taught English clockmaker John Harrison (1693-1776) five years to build Harrison Number One or H1, which kept time so precisely that navigators were able to establish their longitude at sea.
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February 19th, 2013
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