Posts Tagged ‘marine clock’


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’: Yet in 1736-7, just ten (10) years after Newton’s death in 1727 an early model of John Harrison’s marine clock, H-1, proved to be a reliable time-keeper aboard HMS Centurian  on its inaugural  voyage under Captain Proctor RN who unfortunately died as his ship reached home port and before he had brought his report up to date the

a supervised timed voyage – England to Lisbon.

Its acceptance however was  beset with difficulties.Mischievous tales  woven around H-1s1736  London to Lisbon voyage that included were typical of John Harrison’s long struggle for recognition. (more…)