A true sea shanty: the story behind the Longitude prize | Science prizes | The Guardian
John Harrison - Wikipedia
The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation
Momentous Britain on John Harrison, Britain's Greatest Watchmaker
Lone' longitude genius may have had help | New Scientist
John Harrison and the Longitude Problem | Naval History Magazine - October 2019 Volume 33, Number 5
Physics of Harrison's H1 clock | The Sugar High
H1 | Royal Museums Greenwich
The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation
_241228_johnharrison300.jpg
Lone' longitude genius may have had help | New Scientist
Zenith : Marine Chronometer | watch yourself
H1 | Royal Museums Greenwich
H1 | Royal Museums Greenwich
Wooden Clock Spot: Harrison H1 Chronometer
_-_(MeisterDrucke-360865).jpg "A Harrison Number 1, the first navigational clock, c.1735 (back view)")
A Harrison Number 1, the first navigational clock, c.1735 (back view)
Lone' longitude genius may have had help | New Scientist
History of Chronometers Pt. 1: Origins - Worn & Wound
The John Harrison Foundation for the Study of Timekeeping Practices | Anacortes WA
John Harrison - Wikipedia
H1 | Royal Museums Greenwich
