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Longitude (book)
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Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time is a 1995 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.
First edition (US)
Harrison's final triumph - the compact chronometer
Harrison's final triumph - the compact chronometer
John Harrison
Videos
John Harrison 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.
Thomas King's 1767 portrait of John Harrison, located at the Science and Society Picture Library, London
Henry Sully's clock (Fig.1) with escapement (Fig.2) and shipboard gimbaled suspension mechanism (Fig.7).
Henry Sully's clock (Fig.1) with escapement (Fig.2) and shipboard gimbaled suspension mechanism (Fig.7).
Harrison's first sea clock, the H1
Harrison's first sea clock, the H1
Harrison's second sea clock, the H2
Harrison's second sea clock, the H2