John Roger Arnold

Roger Arnold; or, the Sunday Class

• Author(s): Roger Arnold

• Type: Book
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• Published: 1870
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• Publisher: Unknown

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Explanations of Time-keepers, Constructed by Mr. Thomas Earnshaw and the Late Mr. John Arnold

• Author(s): Thomas Earnshaw, Great Britain. Commissioners of Longitude, John Roger Arnold

• Categories: Chronometers

• Type: Book
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• Published: 1806
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• Publisher: Unknown

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Explanation of time-keepers, constructed by mr. Arnold [by J.R. Arnold].

• Author(s): John Roger Arnold

• Type: Book
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• Published: 1805
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• Publisher: Unknown

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An answer from John Arnold to an anonymous letter on the longitude

• Author(s): John Arnold

• Type: Book
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• Published: 1782
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• Publisher: Unknown

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Marine Chronometers at Greenwich

• Author(s): Jonathan Betts

• Categories: Science

• Type: Book
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• Published: 2018-01-03
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• Publisher: Oxford University Press

The Marine Chronometers at Greenwich is the fifth, and largest, of the distinguished series of catalogues of instruments in the collections of the National Maritime Museum. Housed at the Royal Observatory Greenwich — the 'home of time' and the Prime Meridian of the world — this extraordinary collection, which includes the celebrated marine timekeepers by John Harrison (1693-1776), is generally considered to be the finest of its kind in existence. The book is however much more than just a catalogue, and includes an accessible and engaging history of the chronometer, revealing why these instruments were important in our scientific and cultural history, and explaining, in simple terms, how ...