Scope and Contents Correspondence regarding the inspection, rating, supply and testing of service watches and other chronometers and clocks by the Royal Greenwich Observatory Chronometer Section, including the following items:Correspondence regarding the irregular rates of watches in submarines during 'snorting' at sea, 1952.Correspondence regarding tests with Ragasine oil carried out by the Chronometer Section for the International Watch Company, Schaffhause, Switzerland,...

Scope and Contents General correspondence regarding instruments, including the following items:Correspondence with J.S. Hindle, astronomical instrument-maker, regarding the aluminising of four 20-inch mirrors, 1960.Correspondence with C.F. Smith, scientific instrument-maker regarding his 'Projection Spectrum Comparator', 1959, including a photograph and a copy of his paper of August 1959.Correspondence with the Admiralty regarding the Royal Hospital Transit Clock,...

Scope and Contents Correspondence regarding the loan of equipment to the Royal Observatory, including the following items:Correspondence on the Bendorff Electrometer and Flame Collector.Correspondence on the 45° astrolabe.Correspondence on a coil magnetometer.Correspondence on a 6-inch 45-foot focus lens loaned by J. Worthington of California.Correspondence on the loan of the Cookson Floating Zenith Telescope by the Cambridge Observatory Syndicate,...

Scope and Contents Miscellaneous correspondence regarding matters relating to magnetic instruments, including the following material:Correspondence with Adam Hilger Ltd regarding a quartz-fibre vertical force magnetograph, 1920-1924.Miscellaneous correspondence relating to the repair, purchase and testing of magnetic instruments, 1923-1937, including the repair of Elliot Magnetometer No. 75 by Elliott Bros., the testing of the Shuster-Smith Magnetometer for Abinger, the return to the Royal...

Scope and Contents

Correspondence concerning magnetic investigations, including correspondence with the Admiralty regarding suitable observation stations, and with the National Physical Laboratory regarding the propagation of radio waves.

Scope and Contents

Correspondence relating to the National Physical Laboratory and magnetism, including letters concerning the magnetic declination of London and Paris in the early 19th century, with a graph, 1953, and correspondence with Dr E.C. Bullard of the National Physical Laboratory regarding J. Flamsteed's magnetic observations, 1952.

Scope and Contents

Correspondence with the National Physical Laboratory regarding magnetism.

Scope and Contents

Miscellaneous correspondence regarding meteorology, including a memorandum on the units and standards of measurement employed at the National Physical Laboratory, 1950.

Scope and Contents Correspondence relating to mirrors, micrometers and spectrophotometry, including the following material:Correspondence with J. Cooke and Sons on a speculum mirror, 1912.Correspondence with Troughton and Simms on a Duplex micrometer, 1910-1912.Correspondence with the Cambridge Instrument Co. and the National Physical Laboratory on spectrophotometry, 1926-1930.Correspondence concerning a new measuring micrometer for the Cookson Plates and a second micrometer,...

Scope and Contents Correspondence regarding meetings, lectures and other matters relating to various scientific institutions, including the following items:Correspondence with the National Physical Laboratory on time comparisons by Telstar, 1962.Correspondence with Dr Keil of the Deutsche Gesellschaft für Chronometrie on the International Congress, 1959.Correspondence with Réne Baillaud and minutes of a meeting of La Commission Internationale de Coordination des Travaux des...

Scope and Contents Correspondence and memoranda concerning wages, apprenticeships, promotions and the retirement of industrial and non-industrial staff, as well as the applications of watch-makers, repairers and chronometer department staff. The papers include a reference from the Lee Estate Office testifying to D. Weston's reliability with regard to the payment of his rent; correspondence on the recruitment of a Senior Assistant and a Senior Principal Scientific Officer; a report on the Royal Danish...

Scope and Contents Correspondence and papers regarding standard frequency transmissions of the Royal Greenwich Observatory, including the following items:Correspondence with H.M. Smith, 1954, including an extract from a paper by L. Essen on standard frequency time.Correspondence with H.M. Smith regarding barometric pressure variations on the rate of B5, including a graph; investigations of the sub-soil at Herstmonceux; bore-holes for quartz resonators; and variations in the rate of ring...

Scope and Contents

Correspondence with the Admiralty, the National Physical Laboratory and various firms, such as Troughton and Simms, regarding the reversible transit circle.

Scope and Contents

Correspondence relating to the Royal Society and U.N.E.S.C.O., including letters concerning the setting up of the Field Science Co-operation Office in Cairo, 1948, and correspondence with Sir George Darwin, National Physical Laboratory, on the determination of the interval of time, 1946.

Scope and Contents Correspondence regarding the Royal Greenwich Observatory's new transit circle, including the following items:Correspondence with Optical Works Ltd regarding filters for use in the solar eye-piece of the transit circle, 1961.List of optical parts and accessories for the 10-inch Cooke Refractor Telescope and transit instrument that was being offered by C. Baker of High Holborn, London, to A.N. Singh, with a request from Dr Singh regarding the R.G.O. testing the telescope before...

Scope and Contents Correspondence regarding time signals, including duration, frequency, times, coordination of signals, equipment adjustments, replies to queries regarding radio time signals, clocks and the publication of lists of signals, the discontinuation of vernier radio time signals, reception reports and maintenance. The papers include the following items:Royal Greenwich Observatory circulars on solar activity, time signal adjustments and international time signals,...

Scope and Contents

Correspondence with the National Physical Laboratory, 1935-1936, regarding the international testing and comparison of calibrated platinum step reducers used in astronomical spectrophotometry, and correspondence with other institutions, 1930-1938, including the Institute of Physics, H.M. Office of Works and the Franklin Institute, Pennsylvania.

Scope and Contents

Correspondence with magnetic observatories, including Eskdalemuir and Kew, regarding staff and other subjects, and with the National Physical Laboratory, regarding instruments.

Scope and Contents

Minutes, agenda, reports and other papers relating to the executive committee of the National Physical Laboratory.

Scope and Contents

Minutes, agenda, reports and other papers relating to the executive committee of the National Physical Laboratory.

Scope and Contents

Minutes, agenda, reports and other papers relating to the executive committee of the National Physical Laboratory.

Scope and Contents

Minutes, agenda, reports and other papers relating to the executive committee of the National Physical Laboratory.

Scope and Contents

Minutes, agenda, reports and other papers relating to the executive committee of the National Physical Laboratory.

Scope and Contents

Minutes, agenda, reports and other papers relating to the executive committee of the National Physical Laboratory.

Scope and Contents

Minutes, agenda, reports and other papers relating to the executive committee of the National Physical Laboratory.