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Who 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.
John Harrison Biography. John Harrison (24 March 1693 – 24 March 1776) was a carpenter and watch-maker. He invented the marine Chronometer which enabled a ship to accurately know its longitude at sea (position on east-west access) His invention was critical in the development of long-distance seafaring, which was very important in the ...
Apr 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...
John Harrison. Portrait 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.
John Harrison. 1693-1776. English Horologist. Perhaps the most famous clockmaker of all time, John Harrison solved the problem of reliably calculating a ship's longitude while at sea. By designing a highly accurate clock that allowed mariners to chart their position on Earth far more precisely, Harrison solved one of the most important ...
By using an onboard chronometer to track the time at a place with a known longitude—say, Greenwich—a navigator could compare local noon with time at the fixed point and, hence, calculate how far around the world he had traveled—his longitude, in other words.
Apr 3, 2019 · On 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.
