John Harrison's marine timekeepers
John Harrison's marine timekeepers
Feb 25, 2021
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The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation
The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation
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Take a trip to the Royal Observatory this weekend to learn how John Harrison helped solve the problem of finding longitude at sea with the H4 pocket watch: http://bit.ly/JohnHarrison-rmg | Royal Museums Greenwich
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John Harrison’s ‘Clock B’ sets a world record over 250 years after it was designed
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Burgess Clock B, The World's Most Precise Pendulum Clock, Is Made To A 250-Year-Old Design By John Harrison, Longitude Prize Winner And Inventor Of The Marine Chronometer - Quill & Pad
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John Harrison's H1 chronometer. A wooden working replica
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A Detailed Study of H4 - John Harrison's Longitude Timekeeper …
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Harrison H1 clock
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John Harrison's "H3" clock in action
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