Scope and Contents Papers relating to D.H. Sadler's miscellaneous investigations, including, among other items, 'Astrometric Ephemeris of Pluto'; a note on the use of the equinox for the preceding or nearest year; papers relating to ephemerides of minor planets; 'Demonstration of Hollerith Machines'; material on P.Z.T. (Photographic Zenith Tube) Stars, 1950; J.G. Porter, 'The Orbit of a Meteor Stream'; Sadler, 'The Work of the Nautical Almanac Office' and 'Interpolation of the Lunar Ephemeris at Daily...

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Notes, tables and other papers of D.H. Sadler and J.G. Porter regarding the calculation of apparent places of stars, including some printed material.

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'Secular perturbations of Mercury by Venus' and the 'Integration of Complete Orbits' by D.H. Sadler, undated.

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Correspondence and other papers regarding the visits of D.H. Sadler to Ottawa and other places.

Scope and Contents Typescripts, mainly by D.H. Sadler, relating to discussions with G.M. Clemence regarding astronomical constants and other subjects. Comprises:‘Meeting of International Astronomical Union, Zurich: Brief record and post agenda’, typescript by D.H. Sadler, 25 August 1948 (7 pp).‘Rough draft’: typescript (2 pp).‘List of proposed amendments to A3 and A2’: typescript by GMC and DHS, 9 November 1949 (4 pp).‘Miscellaneous notes on DHS’s visit to Canada...

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Correspondence and other papers regarding the article 'A Modern View of Lunar Distances' by D.H. Sadler.

Scope and Contents Papers regarding navigation written or collected by D.H. Sadler, comprising 'Future Provision for Tabular Aids to Astronomical Navigation in the Air'; 'Unification of the American Nautical Almanac and the Abridged Nautical Almanac'; final specimen pages from the 'Abridged Nautical Almanac', 1958, with a covering note; 'Astronomical Polar Navigation. A detailed survey of tabular methods', with specimen tables; 'Ephemeral Data for Sun and Stars to 0'.1'; tables showing azimuth errors; and...

Scope and Contents Papers regarding satellites, including general notes on 'Soviet Science', No. 7, 'A Philosophy of Space Research', sent by the Ministry of Defence to the Royal Greenwich Observatory; a note from the Minister for Science regarding 'Anglo-French Satellite Launcher Proposals, Estimated Performance of Vehicle'; a contribution to 'Satellite discussions' by R. Atkinson; a copy of a document from the Royal Society outlining a scheme of observations of satellites; a copy of 'The Prediction Service...

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A folder regarding the basis of solar ephemeris, especially the comparison between 'Astronomical Ephemeris'/'Nautical Almanac' values from Newcomb's tables and A.P.A.E., Vol. XIV. There are also various other papers relating to 'Sun from Newcomb' work carried out by D.H. Sadler, E. Smith and J.G. Porter, dating mainly from the 1950s.

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Papers regarding Nautical Almanac Office promotions and personal staff matters, mainly left by D.H. Sadler.

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Papers concerning the change in reckoning of the astronomical day, including 'The Report of the Committee on the 24 Hour Method of Expressing Time', 1919; correspondence with the Hydrographer concerning documents; correspondence between D.H. Sadler and the Royal Astronomical Society; and handwritten notes by Sadler on the history and timetable of the proposed change.

Scope and Contents Correspondence and other papers regarding the Institute of Navigation, including the following items:General correspondence with the Institute of Navigation, reports on meetings, discussions on membership and Fellowship, invitations to H. Spencer Jones to attend lectures, etc., 1949-1954. The correspondents include R. Atkinson, D.H. Sadler and M.W. Richey.Minutes of meetings of the Institute of Navigation, 22 November 1949, 30 October 1953 and 19 March 1954.Copy of...

Scope and Contents Papers regarding the International Astronomical Union, including the following items:Statement concerning Professor P. Swings's nomination for a Gold Medal, 1952.R. Atkinson's comments on a circular by Dr Sadler, 1952.Correspondence regarding the publication of the reports of various commissions, 1952.Correspondence with Professor Lindblad concerning candidates for the new Executive Committee, 1952.Correspondence with Dr Jackson regarding funding,...

Scope and Contents Papers regarding to the International Astronomical Union, including the following items:Reports on meetings of the Executive Committee of the I.A.U. concerning the 10th General Assembly in Moscow, 1958.Correspondence with R. Woolley and C. Jowsey regarding a visit to Washington by D.H. Sadler for a meeting of the Executive Committee of the International Council of Scientific Unions, September 1958.Correspondence with the Academy of Sciences, U.S.S.R.; Professors...

Scope and Contents Papers regarding the International Astronomical Union, including the following items:Correspondence with Dr T. Elvius concerning the selected areas committee, 1963.Correspondence with Dr Oosterhoff regarding Commission 27 on the names of variables in Magellanic Clouds, 1963.Correspondence with Professor van der Kamp concerning Commission 26 on double stars.Report to Commission 37 on globular clusters, 1963.Printed programme of the Royal Astronomical...

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Copies of D.H. Sadler's paper 'Amendment to the Lunar Ephemeris', published in 'Monthly Notices of the Royal Astronomical Society', Vol. 101, 1954, with related papers. The paper concerns the recommendation of the Paris Conference on the Fundamental Constants of Astronomy (1950) to amend the lunar ephemeris to bring it into accordance with the solar ephemeris.

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Papers regarding the exhibition 'Man Is Not Lost' at the National Maritime Museum for the bicentenary of the 'Nautical Almanac'. The papers include notes on the preparations, a schedule of featured exhibits, a description of the exhibition, and specifications for the exhibition, with diagrams. There is also a letter from Basil Greenhill, Nautical Maritime Museum, to D.H. Sadler, Nautical Almanac Office, regarding keeping the exhibition at the Museum for two more years.

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Miscellaneous papers regarding the activities of the Nautical Almanac Office, including the N.A.O. Library book plate; notes from D.H. Sadler to the Astronomer Royal on astronomical ephemeris, 12 and 17 March 1969; and material on the bicentenary of the first 'Nautical Almanac', 1958-1961.

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'Miscellaneous Notes on N.A.O. Records and Files' by D.H. Sadler, 25 January 1971, 16 pages, and 'Extracts, Relating to the Nautical Almanac from the Manuscript Book "Auto-Biographical Notes" by Edwin Dunkin...now in the Library of the Royal Astronomical Society', by Sadler, 2 June 1971, 6 pages. Attached to the inside back cover of the binder is a photocopy of an article by Dunkin on the 'Nautical Almanac', 4 pages.

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Photocopies of two papers by D.H. Sadler: 'Miscellaneous Notes on N.A.O. Records and Files', 25 January 1971, 16 pages, and 'Extracts, Relating to the Nautical Almanac from the Manuscript Book "Auto-Biographical Notes" by Edwin Dunkin...now in the Library of the Royal Astronomical Society', 2 June 1971, 6 pages. There is also the typescript of 'The Expanding Role of H.M. Nautical Almanac Office 1818-1975' by G.A. Wilkins, 1975, 7 pages.

Scope and Contents Correspondence and papers regarding the International Astronomical Union's National Committee for Astronomy, including the following items:Agenda and minutes of meetings of various committees, including the National Committee for Astronomy and the Geodesy and Geophysics Committee, 1947.Correspondence with S. Chapman, W.H.M. Greaves, Professor L. Carnera, T.H. Tizard and the Royal Society regarding committee business, including visits abroad, travel allowances and other...

Scope and Contents Correspondence with the Nautical Almanac Office and related papers, including the following material:(1) General correspondenceCorrespondence with D.H. Sadler regarding the prices of N.A.O. publications, 1948.Correspondence between R. Atkinson and Professor Sollenberger regarding latitude changes, 1947.Memorandum of discussions and decisions involving Dr G.M. Clemence of the American N.A.O. and D.H. Sadler of the British N.A.O., 1947.Correspondence...

Scope and Contents Correspondence with the Nautical Almanac Office and related papers, in fifteen sections, including the following material:(1) Astronomical navigation tablesCorrespondence with D.H. Sadler regarding George G. Hoehne's 'Practical Celestial Air Navigation Tables', 1943.Correspondence with D.H. Sadler regarding astronomical tables, 1942.Memorandum by Sadler titled 'Polar Navigation. A Device for Drawing Position Lines within 15 Degrees of the Pole',...

Scope and Contents Correspondence and related papers concerning the Nautical Almanac Office, including the following material:(1) Staff and equipmentMonthly statements by H.G. Scott Barrett of outside work done for the N.A.O., 1943-1945.Correspondence between D.H. Sadler and Sir Harold Spencer Jones regarding the increased accuracy in the transit of the first point of Aries, 1940.Correspondence regarding unestablished service counting for superannuation purposes,...

Scope and Contents Correspondence and papers regarding the Royal Astronomical Society, including agenda and minutes of meetings of committees and the Council; officers' reports; notices and programmes for ordinary meetings; correspondence on speakers and club guests; material concerning papers to be read or refereed; correspondence concerning grants for travel, publications and research; and correspondence regarding the arrangements for lectures given by the Astronomer Royal. The papers include the following...