Miscellaneous correspondence concerning chronometers:

Correspondence with the British Horological Institute concerning the nomination and election of the Astronomer Royal as an honorary member, 1882.

Correspondence with Kew Observatory concerning the rating of chronometers, 1888, including 'an abstract of the principal changes of rate of marine chronometers at Kew Observatory'.

Printed notices of the quarterly meetings of the Worshipful Company of Clockmakers, 1885-1893.

Correspondence with Monsieur Caspari concerning the arrangements for a conference in Paris, 'Congres International de Chronmetrie', 1889.

Correspondence with Liverpool Observatory concerning the effect of temperature on rates of chronometers, 1890, including an 'Abstract from Chronometer Rate Book'.

Correspondence with G.P. Grace concerning temperature errors in marine chronometers, 1885, including a copy of a drawing of an 'automatic compensating Balance Weight' for cancelling the middle temperature error in marine chronometers.

Correspondence with Victor Kullberg concerning the chronometer oven, 1885.

Letter from the horologist J. Poole concerning alterations to chronometers, 1886.

Correspondence with H. Gartner concerning his design for a chronometer compensation balance, 1886, including an explanation of the theory accompanied by diagrams titled 'H Gartner's In all temperatures constant maintaining velocity variable arcs of motion Isochronous Chronometer Compensation Balance and Astronomical Clock Pendulums, being the only means of obtaining Perfect Performing Instruments'.

Correspondence with R.L. Jones, 1887, concerning a complaint about a speech made by the Astronomer Royal to the Royal Astronomical Society on 13 May 1887 in which he associated Jones with a certain method for regulating clock pendulums which Jones denies using.

Correspondence with Kendal and Dent concerning the chronometers Kendal and Dent 4465 and 4636 under trial at the Royal Observatory, 1889, and an extract from the 'Horological Journal', May 1885, titled 'Kendal's Attached Winder for Marine Chronometers'.

Correspondence with A.J. Loftus, chronometer finisher, concerning a proposal for improvements on dial plates, 1889, including a printed 'Provisional Specification'.

Printed advertising literature from Giovanni Bon concerning his method for the 'Hermetical closing of chronometers', 1889.

Correspondence with J. Hartnup of the Liverpool Observatory concerning a query about timekeepers on merchant steamers, 1890.

Papers from G.T. Guthrie concerning his 'new patent Isochronous Governor for regulating the motion of clocks, chronometers and Astronomical machinery', 1890, including a drawing numbered and dated 11749/AD 1889.

Correspondence with D.R. Dingwall, Winnipeg, concerning his proposal for a detached escapement for clocks, 1891.

Correspondence with the horologist R. Whittaker concerning 'Whittaker's Patent Resillient Watch Escapement', 1891.

Correspondence with Osmund Airy concerning his request to purchase a chronometer - Larcum Kendell I, 1892.

Miscellaneous correspondence with horologists, 1892, including advertising literature; enquiries; the trial, return and repair of chronometers; and notices of meetings. Much of the correspondence is incomplete. The correspondents are the Platnauer Bros., Bolton Smith, the Cantonal Observatory, L.P. Casella and the Clock and Watch Makers' Asylum.

Correspondence with Samuel Smith and Son, horologists, concerning non-magnetizable watches and a proposal for improvements to the existing design, 1894.

Photograph from the horologist Brommie Copeland, Salem, New York, of a watch-testing machine, 1894.

Letter from Joseph White and Son, chronometer and watch manufacturers, concerning the delivery of chronometers, including a business card, 1894.

Letter acknowledging the receipt of four chronometers by the Government Observatory, Bombay, 1895.

Correspondence with the horologist Fritz Ehrecke concerning an invention of his, 1878.

Correspondence with Samuel Smith and Son concerning a new design - the revolving escapement pocket chronometer, 1898.

Correspondence with George Grant concerning an invention for setting the hands of chronometers, including a printed specification, 1899.

Papers concerning the trial of a chronometer of Victor Kullberg's at his special request, including drawings and chronometer rates, 1887.