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John Harrison
Document Type: Photo/Image
Geographic Location: England
ID Number: Harrison
Keywords: Navigation, Chronometer
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Description:
John Harrison was the English clockmaker who designed and built the first successful chronometers, clocks accurate enough to take to sea to measure longitude, starting in 1730. After 5 versions of his chronometer, he was finally awarded the full prize put up by Bridain's Board of Longitude government of 20,000 pounds.
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