Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time

Dava Sobel chronicles the eighteenth-century race to determine a ship's east-west position at sea, a challenge that caused frequent shipwrecks and stunted global trade. While the scientific establishment, led by Astronomer Royal Nevil Maskelyne, sought an answer in the stars through complex lunar distance tables, self-taught clockmaker John Harrison pursued a mechanical solution. Harrison spent decades refining the marine chronometer, a precision timepiece capable of maintaining accuracy despite the friction, humidity, and motion of a long ocean voyage. The narrative details his technical innovations and his long struggle against the Board of Longitude to claim the statutory prize for his invention.

This account serves readers interested in horology, maritime navigation, and the history of the Enlightenment. It appeals to those who enjoy learning how specific mechanical breakthroughs shifted global politics and commerce. Readers gain a clear understanding of the mathematical relationship between time and distance, alongside a perspective on how institutional gatekeeping can hinder disruptive technology. The book provides a technical breakdown of early watchmaking while illustrating the professional friction between theoretical scientists and practical craftsmen.