Found in 117 Collections and/or Records:
Correspondence regarding magnetic observations received by the Royal Observatory from other observatories.
Correspondence relating to magnetic observations given by the Royal Observatory to universities, colleges, collieries and petroleum companies, 1927-1928 and 1935-1938.
Official correspondence concerning magnetic observations, including letters on a 'Nuclear-Free Precession Magnetometer', 1956.
Correspondence regarding magnetic observations received mainly from foreign magnetic observatories.
Correspondence regarding magnetic observations supplied mainly to foreign observatories.
Correspondence with computers engaged on magnetic reductions. The volume also includes work books of the computers, attendance records and other items.
Correspondence regarding the effects of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.
Correspondence regarding the effect of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.
Official correspondence with the Admiralty regarding magnetic instruments, surveys, disturbances and results of observations.
Miscellaneous correspondence concerning magnetism, including scientific discoveries; electric fields; new types of magnet; sunspots and magnetic storms; starting a new magnetic observatory in Siam (Thailand); and special work done on terrestrial magnetism at Abinger for the second International Polar Year 1932-1933.
A small set of general correspondence on magnetic observations.
Correspondence with the National Physical Laboratory regarding magnetism.
General correspondence regarding magnetic investigations.
General correspondence regarding magnetic observations.
Correspondence regarding magnetic information supplied to the War Office.
Miscellaneous correspondence regarding magnetism and meteorology, including an illustration and translation of a leaflet, sent by H.V. Skan to the Astronomer Royal, concerning a 'Radiation Balance Meter' being manufactured by Dr B. Lange in Berlin.
Correspondence with C. Brooke, F. Beaufort, E. Sabine and F. Ronalds concerning magnetic instruments and photographic registration. There are two circulars advertising Gray and Keen's floating compasses; specimens of photographic secondaries and tertiaries; papers regarding tests on various emulsions; and notes on the Greenwich magnetic instruments for 1853 and 1854.