Harrison's Marine Chronometer - World History Encyclopedia
https://www.worldhistory.org/article/2197/harrisons-marine-chronometer/
WEBMar 14, 2023 · John Harrison (1693-1776) invented an accurate marine chronometer after several decades of research and development. While the pendulum clock had already been invented in the 17th century, a clock that could withstand the vagaries of the sea, humidity, and air temperature remained an elusive dream. Harrison's last watch, the H5 of 1770, …
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