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John Harrison's Chronometers
John Harrison's Chronometers


http://www.theguardian.com/science/2015/apr/19/clockmaker-john-harrison-vindicated-250-years-absurd-claims

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.

http://www.independent.co.uk/news/science/john-harrisons-longitude-clock-sets-new-record--300-years-on-10187304.html

John Harrison's 'longitude' clock sets new record - 300 years on


http://www.theguardian.com/science/2014/may/18/true-sea-shanty-story-behind-longitude-prize-john-harrison

A true sea shanty: the story behind the Longitude prize


https://www.youtube.com/watch?v=ecrf8KhVcyo

Longitude

Three hours. Superb.

https://www.youtube.com/watch?v=Hhxe8Wn8uiU

Nova one hour video on Harrison.