A Detailed Study of H4 - John Harrison's Longitude Timekeeper Reconstruction
2:30
John Harrison (Official Music Video) | The Brilliance
3:52
George Harrison - Got My Mind Set On You (Version II)
1:49
Should we stop the Harrison clock?
2:47
John Harrison & The Hustlers - Don't Ask Why
John Harrison was a self-educated English carpenter and clockmaker who invented a marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea.