Scope and Contents Correspondence on the need for the Abinger Magnetic Observatory and on the establishment of the observatory, including the following material:Correspondence with Admiralty departments and officials, 1923-1937, including the Scientific Research Department, the Civil Engineer-in-Chief, the Hydrographic Department, the Director of Electrical Engineering, Sir Vincent Baddeley, Col. R.G. Hayes, the Director of Naval Construction and the Secretary of the Admiralty concerning the move,...

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Correspondence concerning the 'Comité International Météorologique et Commission Internationale de Magnetisme Semestre', with copies of quarterly summaries of days classified according to magnetic disturbance, sent to the Director of the Royal Meteorological Institute, Netherlands; a report on magnetic work undertaken, sent to the Cassiot Committee, 1924; and a list of the magnetic work undertaken at the Kew Observatory.

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Correspondence with G.G. Stokes, J.P. Gassiot and others on the Greenwich Dip Instrument. The papers include printed correspondence between Kew Observatory and Airy; a report of the Kew Commission of the British Association for the Advancement of Science; and readings from Airy's Dip Instrument, 1863-1864.

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

Scope and Contents Correspondence with E. Dent and Co. concerning the replacement of the escape wheel of the magnetic declination time piece, 1891. Correspondence with Troughton and Simms concerning the repair of the declination magnet theodolite, 1892.Correspondence with A. Reuker concerning the design of declination magnets, 1898.Correspondence with the Kew Observatory concerning the supply of a unifilax magnetometer to the Royal Observatory, 1890-1891.Correspondence with...

Scope and Contents Correspondence and papers concerning new magnetic instruments and results of tests. There are papers regarding the annual examination of magnetic declinations; horizontal force magnets; damper experiments with the declination magnets; old vertical and horizontal force instruments; lists of dislocations of the vertical force magnets; new vertical force magnets; comparisons of the Greenwich photographic records with those at Kew Observatory; magnet thermometer line graphs; a new underground...

Scope and Contents Copies of letters of Sir George Airy, Astronomer Royal, concerning 'A new form of numerical expression of magnetic perturbations', 1872.Copies of letters of Airy concerning papers giving the daily range of magnetic declination, 1878.Copies of notes for the examination of diurnal magnetic curves, 1879.Correspondence with W.J. Cockburn-Muir concerning the latitude of the north magnetic pole, 1879.'A comparison of daily variation with sun spots',...

Scope and Contents Correspondence concerning 'Special cases out of which arose discussions as to original protective clauses', including conferences at the Board of Trade. The correspondence covers the period 1893-1903, and is mainly with the Director of Works.Correspondence with A.W. Rücker and others concerning the protection of the Royal Observatory from the production of a 'magnetic field' as a result of poor insulation between the carriages of the trains passing by the Royal Observatory,...