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Correspondence with D.H. Sadler, N.A.O., regarding 10-figure tables of trigonometrical functions by Dr Otto Kohl.

Scope and Contents Correspondence with Donald Sadler, including copies of official correspondence between H.M. Nautical Almanac Office and the U.S. Navy N.A.O. The subjects include the use of 'Nautical Almanac' material in the B.A.A. Handbook, with some mention of the copyright position and reproduction fee; the recomputation of Crommelin's Perturbation Tables, mentioning the use of (human) computers in the N.A.O. and British Astronomical Association in September 1947; the use of 'National Machines' in this...

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A letter from Dr E. Griffiths, National Physical Laboratory, to D.H. Sadler, Nautical Almanac Office, 5 August 1947, and Sadler's reply of 11 August, regarding Sadler's possible attendance at a British Association meeting in Dundee. There is also a note on a computing symposium to be held at the meeting.

Scope and Contents Miscellaneous correspondence with the Admiralty:Correspondence with the Accountant General of the Navy regarding payments to staff, insurance, office expenses, postage, accounting, the closing of the Nautical Almanac Office's bank account, and other subjects, 1921-1941.Correspondence with the Civil Establishments Branch on various staff matters, 1927-1935.Correspondence concerning a census of Civil Service staff, 1932-1933, including copies of form E40 (returns of...

Scope and Contents Correspondence with the British National Committee for Astronomy regarding meetings, agenda and minutes of meetings, proposals, and reports on various projects. There is material regarding the computational needs of theoretical astronomy; the proposed institute of theoretical astronomy; the European Southern Observatory; the 9th General Assembly of the International Astronomical Union; the International Polar Motion Service; grants in aid of travel; and frequency bands for radio astronomy....

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A letter from G.A. Bull of the Meteorological Office to D.H. Sadler, 11 July 1944, and Sadler's reply of 14 July, regarding corrections for sunset.

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Besselian and Independent Day Numbers for 1971-1980, c. 1963, 1 bundle, with notes of day numbers by D.H. Sadler, 1953, 1 envelope.

Scope and Contents Side A: D.H. Sadler talking to S. Malin about his work as Superintendent of the Nautical Almanac Office. He discusses: his joining the NAO; a description of the NAO before the War; L.J. Comrie; the transfer of the NAO to Royal Observatory control; the wartime move to Bath; contacts between the NAO and ORO before the War; a description of the hockey club; memories of Spencer Jones and Woolley; links between the NAO and the ORO.Side B: Unrelated interview: Stuart Malin interviewed by...

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A typescript copy of an essay by D.H. Sadler entitled 'The Bicentenary of the Nautical Almanac', 1967. There is also an annotated manuscript and typescript draft of the essay, which includes a printed copy of a 1966 talk by Sadler on the same subject.

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A photocopy of 'Formulae for the Calculation of Geodetic Positions' by J.C.B. Redfearn, 1941. There is an accompanying letter from Redfearn to D.H. Sadler, 17 October 1941, presenting the volume, and a letter from Harold Spencer Jones to Sadler, 24 November 1941, regarding Redfearn's formulae.

Scope and Contents Miscellaneous correspondence:Correspondence with D.R. Hartree, 1929-1936, concerned mainly with calculating machines and their use for a mathematics department of a university.Correspondence with Major M. Hotine of the Ordnance Survey, Southampton, 1935-1936, concerned principally with the reductions of star observations carried out by the Nautical Almanac Office.Correspondence with T.C. Hudson, 1927-1937, relating mainly to outside work undertaken by...

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Nos 101-356 of the NAO Journal Reprint Series, comprised of typescripts, photocopies and printed items. The principal authors are D.H. Sadler, J.G. Porter and G.A. Wilkins. The dates the reprints were made is not known.

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Notes on Comet N.A.O. I. produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler.

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Notes on Comet N.A.O. I. produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler.

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Notes on Comet N.A.O. I. produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler, 11 July 1953, including comments by Sadler, 13 July 1953.

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Notes regarding computations for the Sun and planets for 1960-1980, made mainly by D.H. Sadler and J.G. Porter in 1954.

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'A modified technique for Cowell's method', notes produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler.

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'Kepler's Equation on the 602A', notes produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler, 26 April (no year).

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Notes on methodology and computing technique produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler.

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Notes on methods for computing perturbations: 1. Bauschinger; 2. Merton; 3. Oppolzer; and 4. Hansen. The notes were produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler. They include a note by Sadler.

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Two notes from D.H. Sadler to G.A. Wilkins regarding numerical integration.

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Notes on perturbations by punched cards produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler.

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Notes on perturbations-of-elements methods produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler.

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Miscellaneous notes by D.H. Sadler and J.G. Porter on smoothing.

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Notes on the Crommelin-Merton Method produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler.