Stopwatch 1736

Stopwatch 1736

Englishman George Graham (1673-1751) He first used the term stopwatch for a small portable pendulum.

He also invented in 1715 the device "walking with an anchor obstacle", and in 1721 he invented the mercury compensating mechanism.

Another English watchmaker John Harrison (1693-1776) made the first sea chronometer which he finally set up in 1761.
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