What happened in the 1700s?
π 1709: Measurement of Longitude at Sea Improved - John Harrison works on the marine chronometer.
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Further Reading
Longitude found - the story of Harrison's Clocks (co.uk)
John Harrison's Creative Breakthrough (colby.edu)
John Harrison: The Carpenter Who Solved the Longitude Problem (screwdowncrown.com)
On this day in 1693, the English carpenter and clockmaker ... - Reddit (reddit.com)
How measuring Longitude was solved | Harrison's Clock (geographyfieldwork.com)
John Harrison and the Longitude Problem | Naval History Magazine (usni.org)
Which device made it possible to measure latitude and longitude at ... (brainly.com)
John Harrison And The Marine Clock - Bremont Watch Company (bremont.com)