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Harrison's third marine chronometer, 1757.

 
Harrison's third marine chronometer, 1757.
4 0 c m
 
34cm
actual image size: 26cm x 32cm

Description

Harrison's third marine chronometer, 1757. John Harrison (1693-1776), English inventor and horologist, discovered the means by which longitude could be determined accurately. He developed a marine chronometer which, in a voyage to Jamaica (1761-1762) determined the longitude within 18 geographical miles. He also invented the gridiron pendulum (1726), the going fusee and the remontoir escapement.

Image Details

Image Ref.
 
10204441

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