John Harrison and the Longitude Problem - The story behind the manufacture of John Harrison's marine timekeepers, which allowed early sailors to establish their longitude.

		Tuesday, 18 June, 2013
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John Harrison and the Longitude Problem

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	The story behind the manufacture of John Harrison's marine timekeepers, which allowed early sailors to establish their longitude. Presented by the Royal Observatory in Greenwich. Sponsored Links:
URL:	http://www.nmm.ac.uk/server.php?show=conWebDoc.355&navId=005001001
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Category:	Dvd John Harrison And The Longitude Problem - John Harrison - Longitude Of Italy - Longitude And Lattitude - Calculate Lattitude Longitude - Rg Harrison - Harrison Mj - Harrison Ar - Harrison And Boger - John T

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