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Radcliffe Tracts 94 (1)Le Roy, Julien
A Memoir on the Best Method of Measuring Time at Sea, which obtained the Double Prize adjudged by the Royal Academy of Sciences, containing The Description of the Longitude Watch presented to His Majesty the 5th of August 1766. By M. Le Roy, Jun., Clock-maker to the King. Translated from the French by Mr T. S. Evans, F. L. S.
London: Printed by R. Taylor & Co., Shoe Lane, n.d.
[1934-41]
[n.d.]