In the 18th century John Harrison solved the problem of determining longitude at sea using what instrument?
Longitude (book) Longitude (book) Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time is a best-selling book by Dava Sobel about John Harrison, an 18th-century clockmaker who created the first clock (chronometer) sufficiently accurate to be used to determine longitude at sea—an important development in navigation. The book was made into a television series entitled "Longitude". In 1998, "The Illustrated Longitude" was published, supplementing the earlier text with 180 images of characters, events, instruments, maps and publications. Determining longitude on land was fairly easy compared to the task at sea. A stable surface to
John Harrison apart, in October 2000 and February 2001 respectively. John Harrison John Harrison ( – 24 March 1776) was a self-educated English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea. Harrison's solution revolutionized navigation and greatly increased the safety of long-distance sea travel. The problem he solved was considered so important following the Scilly naval disaster of 1707 that the British Parliament offered financial rewards of up to £20,000 (equivalent to £ in 2019) under the 1714 Longitude Act. In 1730, Harrison presented his first design, and worked