The quest for a solution had occupied scientists and their patrons for the better part of two centuries when, in 1714, England's Parliament upped the ante by offering a king's ransom ([pound]20,000, or approximately $12 million in today's currency) to anyone whose method or device proved successful. Countless quacks weighed in with preposterous suggestions. The scientific establishment throughout Europe -- from Galileo to Sir Isaac Newton -- had mapped the heavens in both hemispheres in its certain pursuit of a celestial answer. In stark contrast, one man, John Harrison, dared to imagine a mechanical solution -- a clock that would keep precise time at sea, something no clock had ever been able to do on land.
Longitude is the dramatic human story of an epic scientific quest, and of Harrison's forty-year obsession with building his perfect timekeeper, known today as the chronometer. Full of heroism and chicanery, brilliance and the absurd, it is also a fascinating brief history of astronomy, navigation, and clockmaking. Through Dava Sobel's consummate skill, Longitude will open a new window on our world for all who read it.
In 1714, England's Parliament offered a reward to anyone whose method or device for measuring longitude proved successful. John Harrison imagined a clock that would withstand pitch and roll, temperature and humidity, and keep precise time at sea--something no clock had been able to do on land. This is the story of Harrison's 40-year effort to build his perfect timekeeper, known today as the chronometer.
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