The Illustrated Longitude The True Stor by Dava Sobel

The provided text is an extensive excerpt from Dava Sobel's book, "Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time," complete with the table of contents, acknowledgments, and bibliography. This material details the historical struggle to accurately determine a ship's longitude at sea, a critical challenge that resulted in devastating nautical disasters and spurred global scientific efforts. The main narrative focuses on John Harrison, an English clockmaker, who tirelessly invented a series of precision marine timekeepers (chronometers, especially H-4) that solved the problem, despite facing intense skepticism and opposition from the established astronomical community, notably Nevil Maskelyne, who favored the celestial "lunar distance method." The text explores the various unsuccessful proposals, the British Parliament's lucrative Longitude Act of 1714 offering a huge prize, and the ultimate, though complicated, vindication of Harrison's mechanical solution, which revolutionized global navigation.

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