Posts Tagged ‘flamsteed’

LOTTO AND LONGITUDE

Wednesday, August 9th, 2017

‘But by reason of the motion of the Ship, the Variation of Heat and Cold, Wet and Dry, and the Difference of Gravity in different Latitudes, such a watch hath not yet been made”. And not likely to be, either, he implied’.  Isaac Newton cited, Dava Sobel, Longitude, Fourth Estate, London, 1998

‘And not likely to be’: However in 1736-7 just ten (10) years after Newton’s death (1727) H-1, an early model of John Harrison’s  marine watch  on a supervised timed voyage – England to Lisbon aboard HMS Centurian – proved to be a reliable time-keeper.

Accurate time-keeping was essential for the calculation of longitude at sea. Harrison a Yorkshire carpenter solved that problem. His  invention – a sea-going ‘pocket watch’ – gave a ship’s precise position when beyond sight of land.

‘John Harrison, the man who solved longitude in 1759’. Peter Ackroyd, Revolution, Macmillan, London, 2016

The Centurian voyage was typical of John Harrison’s long struggle for recognition.

‘He [Harrison] succeeded, against all odds, in using the fourth – temporal – dimension to link points on the three-dimensional globe’. Sobel. ibid.

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