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Prints [Earnshaw, Thomas]
Explanation of the Escapement of Mr. Earnshaw's Time-Keeper, From the Model presented at a meeting of the Board of Longitude, held at the Admiralty, on the 7th of June, 1804
Printed by T. Bensley, Bolt Court, Fleet Street [London]. [7 pages in single uncut but folded sheet; together with loose folded plate.] No publisher, no date [c.1804]. Plate headed 'From the Model of Mr. Earnshaw's Escapement', engraved by James Basire.
1804?