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Jonathan Betts

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Marine Chronometers at Greenwich: A Catalogue of Marine Chronometers at the National Maritime Museum, Greenwich
Harrison Decoded: Towards A Perfect Pendulum Clock
A General History of Horology
Time Restored: The Harrison Timekeepers and R.T. Gould, the Man Who Knew (Almost) Everything
A General History of Horology
Marine Chronometers at Greenwich
John Harrison and the Quest for Longitude
Time Restored
John Harrison
John Harrison and the Quest for Longitude
Time Restored The Harrison Timekeepers and R.T. Gould, the Man who Knew (almost) Everything
Harrison