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John Harrison - Wikipedia
https://en.wikipedia.org/wiki/John_Harrison
WEBJohn Harrison (3 April [O.S. 24 March] 1693 – 24 March 1776) was an English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea.
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John Harrison | Marine Chronometer, Clockmaker, Longitude
https://www.britannica.com/biography/John-Harrison-British-horologist
WEBMar 20, 2024 · John Harrison (born March 1693, Foulby, Yorkshire, Eng.—died March 24, 1776, London) was an English horologist who invented the first practical marine chronometer, which enabled navigators to compute accurately their longitude at sea.
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Harrison's Marine Chronometer - World History Encyclopedia
https://www.worldhistory.org/article/2197/harrisons-marine-chronometer/
WEBMar 14, 2023 · John Harrison (1693-1776) invented an accurate marine chronometer after several decades of research and development. While the pendulum clock had already been invented in the 17th century, a clock that could withstand the vagaries of the sea, humidity, and air temperature remained an elusive dream. Harrison's last watch, the H5 of 1770, …
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Longitude found - the story of Harrison's Clocks
https://www.rmg.co.uk/stories/topics/harrisons-clocks-longitude-problem
WEBWho was John Harrison? John Harrison was a carpenter by trade who was self-taught in clock making. During the mid-1720s he designed a series of remarkable precision longcase clocks. These clocks achieved an accuracy of one second in a month, far better than any clocks of the time.
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Who Is John Harrison? Why Google Celebrates the Clockmaker
https://time.com/5225772/john-harrison-longitude/
WEBApr 3, 2018 · Today, on what would have been Harrison’s 325th birthday, Google is celebrating the legendary horologist with a special Doodle. John Harrison, (1693-1776). Inventor of the marine...
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A true sea shanty: the story behind the Longitude prize
https://www.theguardian.com/science/2014/may/18/true-sea-shanty-story-behind-longitude-prize-john-harrison
WEBMay 17, 2014 · This machine was the first of John Harrison's clocks, known as H1, predating all those other chronometers, and representing his first attempt to make a timekeeper that would remain accurate on ...
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The Chronometers of John Harrison and the Problem of Longitude
http://scihi.org/john-harrison-longitude/
WEBOn April 3, 1693, self-educated English carpenter and clockmaker John Harrison was born. Harrison invented the marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea.
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John Harrison's Horological Legacy — Google Arts & Culture
https://artsandculture.google.com/story/6AVxYKoa1d8DIw
WEBJohn Harrison (1693–1776) was. an English clockmaker, celebrated for developing numerous. mechanisms which improved the technology of timekeeping devices. Harrison invented the gridiron pendulum (illustrated here in the background to the right), grasshopper escapement, bi-metallic strip (as you would find in your kettle) and an automatic form ...
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Building an Impossible Clock - The Atlantic
https://www.theatlantic.com/technology/archive/2016/01/pendulum-clock-john-harrison/424614/
WEBJan 19, 2016 · The 18th-century horologist John Harrison claimed that he could make the world's most accurate pendulum clock, but his methods were scorned for hundreds of years—until someone proved him right ...
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John Harrison | Time and Navigation - Smithsonian Institution
https://timeandnavigation.si.edu/multimedia-asset/john-harrison
WEBPortrait of John Harrison by James King, about 1766. A stunning technical breakthrough came when English carpenter and clockmaker John Harrison built five experimental sea clocks between 1735 and 1772. With them, he demonstrated the feasibility of accurate timekeeping at sea.
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