Clockmaker John Harrison vindicated 250 years after ‘absurd’ claims
58ths of a second over 100 day accuracy is proven with Harrison's design in April of 2015.
A true sea shanty: the story behind the Longitude prize
John Harrison's 'longitude' clock sets new record - 300 years on
Longitude
Three hours. Superb.
Nova one hour video on Harrison.
Revolution in time
Clocks and the Making of the Modern World, Revised and Enlarged Edition David S. Landes
