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Papers regarding the public trials and improvements of clocks and chronometers:
Outline plan for the trial of timekeepers prior to public sale, 1805.
Hydrographer's reports of 1816-1820 relating to chronometers issued in 1816 and 1817, superintendence of chronometers given to the Hydrographer, etc.
Papers regarding chronometer trials, 1818-1826.
Admiralty instructions to officers supplied with chronometers (undated, but probably after 1822).
Various rates of chronometers, 1779.
Papers regarding T. Mudge's improvements in chronometers and the rates of his chronometers Green and Blue (as tried at the Royal Observatory), 1779-1796.
R. Warter's proposal to regulate chronometers by keeping them in the sea, 1783.
Rates of Kendall's first watch, 1786-1787.
Letter from J. Pine on an improved compensation pendulum, 1790.
Correspondence with J. Emery regarding chronometer improvements, 1791.
Correspondence regarding J. Emery's chronometers and their rates, 1793-1794.
Correspondence with G. Margetts regarding chronometers improvements, 1796.
Letter from R. Walker concerning J. Russell's timekeeper, 1796.
Petition of W. Parkes to have a timekeeper examined by the Board, 1798.
W. Coombe on experiments with balances and pendulums, 1799.
J. Dumbell on a chronometer unaffected by heat or cold, 1799.
Proposal from J. Dumbell for regulating chronometers by submersion in a liquid of uniform temperature, 1803.
Hardy's improvements and the trial of his clock at Greenwich, 1805-1818.
J. Manton's proposal for regulating chronometers by enclosing them in a vacuum, 1807.
Papers regarding W. Forder's chronometer improvements, 1810.
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