John Arnold (Chronometer maker)

An Account of the Going, during thirteen months, at the Royal Observatory at Greenwich, of a Pocket Chronometer invented and made by J. Arnold

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An Account Kept During Thirteen Months in the Royal Observatory at Greenwich

Of The Going of a Pocket Chronometer, Made on a New Construction, by John Arnold, Having His New-invented Ballance Spring, and A Compensation for the Effects of Heat and Cold In the Ballance. Published by Permission of the Board of Longitude

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Principles and explanations of timekeepers by Harrison, Arnold and Earnshaw

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