
From The Birth of Plenty. William Bernstein. 2010. Kindle online sample. Section 1. From book sample: Captain George Proctor of the HMS Centurion had every reason to thank watchmaker JOHN HARRISON, WHO HAD ACCOMPANIED HIS H-1 MARINE CHRONOMETER—A LARGE AND EXTREMELY ACCURATE CLOCK USED TO COMPUTE LONGITUDE—on its first sea trials in the late spring of 1737. As the faint line of the English coast rose above the horizon, Centurion’s navigator, relying on traditional dead reckoning, calculated that the ship was sailing in safe waters south of Dartmouth. Harrison disagreed. His clock placed them about eighty miles from Dartmouth, in hazardous waters just off the Lizard, a peninsula at the far southwestern tip of England. Taking no chances, the captain turned east and confirmed a few hours later that Harrison’s computation had been dead on. … Proctor’s caution would have been readily understandable to any seafaring contemporary. Thirty years earlier, Admiral Sir Clowdesley Shovell, ma...