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单词 longitude watch
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longitude watch
longitude watch n. now historical a small chronometer formerly used in ascertaining longitude.
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the world > time > instruments for measuring time > [noun] > chronometer
longitude1665
longitude watch1670
chronometer1714
sea-watch1768
watch1778
box chronometer1789
oligochronometer1857
1670 H. Oldenburg Let. 20 Jan. in Corr. (1969) VI. 437 Mr Hugens in a late letter of his to me, writeth thus concerning his longitude-watch, he sent to Candia.
1764 Ann. Reg. 1763 i. 100 The trial of Mr. Harrison's longitude watch.
1929 Rep. Proc. Empire Conf. Surv. Officers 1928 26 Each observing party of the Topographical Survey carries four sidereal watches in a special container and two stop watches, one intended as a spare; but, while marked as a spare, the latter is used as a longitude watch.
2009 N.Y. Times (National ed.) 14 June (Travel section) 2/3 Because of inventions like the deck watch and longitude watch, Breguet was appointed Watchmaker to the Royal Navy in 1815.
extracted from longituden.
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