Scope and Contents Correspondence concerning the annual trials of chronometers and watches at the Royal Observatory:Table showing the greatest change in rate, from one week to the next, of various chronometers during the annual trials of 1856-1880, compiled 1885.Correspondence concerning the annual trial of chronometers, 1885, including a rough abstract on the chronometer trial of that year, a letter of withdrawal from the horologist W.G. Schoof, a list of chronometers entered in the trial, a...

Scope and Contents Correspondence concerning the purchase and loss of chronometers:Correspondence with E. Dent and Co., J. Poole and Co., T. Hewitt and other watchmakers asking for a quote for making deck watches, 1885.Correspondence concerning the purchase of chronometers from Messrs Williams, Moore, Shephard and Son, J. Poole and Co., and Reid and Sons, 1885.Correspondence with the Hydrographer of the Navy concerning the purchase of chronometers and deck watches,...

Scope and Contents

Correspondence regarding clocks and chronographs, including correspondence with the Japanese Consul and E. Dent and Co. on a chronograph for the Japanese Government, 1880; and correspondence relating to various inventions associated with clocks, 1886-1937, including Mr Schoof's gravity escapement (1897), the Synchronome Co. Ltd's synchronised pendulum (1937), Mr Gordon's pneumatic clock system (1886), and R.W. Nichol's pendulum (1913).

Scope and Contents

Correspondence relating to chronographs, clocks, time balls and time signals, including the following material:

Correspondence with E. Dent and Co. concerning a new time ball, 1914-1920.

Correspondence regarding a new standard astronomical clock and Riefler clocks, 1919-1925.

Correspondence regarding repairs to clocks and chronographs, 1917-1938.

Correspondence concerning the sale of regulators, 1932.

Scope and Contents Correspondence concerning time signals, including the following material:Correspondence with E. Dent and Co. regarding irregularities in the Westminster Clock, tables of errors for the clock and newspaper cuttings relating to it, 1902-1906.Correspondence regarding the installation of a wireless-telegraph receiving station at Greenwich, 1912-1914.Correspondence of 1912-1915 regarding the inauguration of a wireless-telegraph time service from the Eiffel Tower and...

Scope and Contents (1) Miscellaneous papers, 1922-1929Papers from chronometer-makers and the public concerning the following subjects:1. The supply to the Royal Observatory of relays, batteries for time signals, non-magnetic watches, accumulators, carbon-dioxide gas and cylinders, ammeters, agate contact wheels, aerial protectors, thermostats, thermometers and magnets.2. Circulars for chronometers, oil, dry roll batteries and spare parts.3. Appointments to visit the Royal...

Scope and Contents Correspondence with T. Lewis and E. Dent and Co. concerning repairs to clocks and correspondence with W.H. Shepherd, 1888-1889.Correspondence with Victor Kullberg concerning the tender for the supply of new electric dials and the repair of old ones, 1897-1899.Correspondence with clockmakers, principally V. Kullberg and Dent and Co., concerning repairs to Royal Observatory clocks and chronometers, 1901-1911.Internal memoranda on the subject of clocks, chronographs and...