John Harrison's Chronometers
John Harrison's Chronometers

Clockmaker John Harrison vindicated 250 years after Ďabsurdí 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


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