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Radcliffe Tracts 21 (7)Eiffe, John Sweetman
Account of Improvements in Chronometers, made by Mr. John Sweetman Eiffe, for which a reward was granted to him by the Lords Commissioners of the Admiralty
With an Appendix, containing Mr. Robert Molyneux's Specification of a Patent for Improvements in Chronometers. London: John Murray, 1842.