“With his marine clocks, John Harrison tested the waters of space-time. He succeeded, against all odds, in using the fourth—temporal—dimension to link points on the three-dimensional globe. He wrested the world’s whereabouts from the stars, and locked the secret in a pocket watch.” LongitudeLongitude ActJohn HarrisonMarine ChronometerMarine Clock Book:Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time Source: Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time