Pepe Gallaga: another literary work
Yet as science writer Dava Sobel points out in her engaging and delightful new book Longitude, the big breakthroughs in clock construction came in pursuit of seafaring, not social regulation. In the 15th century, when nations began to sail the world's oceans seriously, the greatest obstacle to navigation was the inability to determine longitude (position east-west) at sea. Latitude (position north-south) could be read by observing the apparent motion of the sun. But this technique did not apply to longitude, and as a result the fleets of Europe spent inordinate time and incurred constant loss of life essentially wandering the high seas, trying to figure out where they were.
Minds as famed as Galileo, Newton, and Halley applied themselves to the problem and believed its solution lay in observation of the moon or the satellites of Jupiter. Sobel's tale concerns John Harrison, an obscure English watchmaker from a merchant-class background who believed clocks held the answer. Harrison had to battle the budding English science establishment, which wanted the solution to be based on the glamorous, aristocratic pursuit of astronomy, not the tinkerings of a mere craftsman. Sobel's story is rich with fascinating details both of scientific investigation and the bureaucratic politics of 18th-century England. Longitude is well-timed too, as the new Umberto Eco novel The Island of the Day Before features a protagonist marooned on an 18th-century vessel stocked with bizarre longitude instruments.
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