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John Harrison
John Harrison (– 24 March 1776) was a self-educated English carpenter and clockmaker. He invented the marine chronometer, a long-sought after device for solving the problem of establishing the East-West position or longitude of a ship at sea, thus revolutionising and extending the possibility of safe long-distance sea travel in the Age of Sail. The problem was considered so important following the Scilly naval disaster of 1707, that the British Parliament offered financial rewards of up to £20,000 (£}}) under the 1714 Longitude Act. Harrison came 39th in the BBC's 2002 public poll of the 100 Greatest Britons.
== Early life ==
John Harrison was born in Foulby, near Wakefield in the West Riding of Yorkshire, the first of five children in his family. His father worked as a carpenter at the nearby Nostell Priory estate. A house on the site of what may have been the family home bears a blue plaque.
In around 1700, the Harrison family moved to the Lincolnshire village of Barrow upon Humber. Following his father's trade as a carpenter, Harrison built and repaired clocks in his spare time. Legend has it that at the age of six, while in bed with smallpox, he was given a watch to amuse himself and he spent hours listening to it and studying its moving parts.
He also had a fascination for music, eventually becoming choirmaster for Barrow parish church.
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