A single volume of bound letters.

A diary of work performed on the 'Nautical Almanac' and arrangements for its compilation and publication.

A manuscript comprising Computus Ecclesiasticus, Introductio ad Geographiam, Tractatus de Sphoera, Epitome Astronomia, and Astrolabium sev. Plani-Sphaerium.

Miscellaneous draft letters.

Contains notes and extracts on philosophy, astronomy, natural history and medicine. fo. 2: 'Edmundus Lëus 1607'.

The collection is comprised of biographical papers, wartime and post-war research files (including research papers relating to work on Meniscus Schmidt and related optical systems), papers concerning work for consultancies on the design of optical systems for commercial and other organisations, and drafts and related correspondence regarding publications, lectures and conferences.

The collection primarily consists of the Maunders' published works both on their research and explanatory works on astronomy for a more popular audience. Some of these publications bear annotations. There are also some notes on a variety of subjects, a pin-hole camera, a planisphere and some items of correspondence. There is supporting material in the form of obituaries, letters of condolence and subsequent published works on the Maunders and their work.

A collection of papers concerning horology and clockmaking. It includes correspondence between Ernest C. Atkinson and a range of people connected with horology and timekeeping, including Humphry Smith and other members of the RGO’s Time Department. The collection also includes pamphlets, leaflets, papers and booklets, brochures for watch sales, admiralty notices to mariners re time signals, sets of notes, graphs and calculations, and a small number of photographs of clock parts.

'To clear the distance of the Moon from a star from the effects of refraction and parallax', February 1766. The envelope includes copies of reports made to the Board of Longitude by John Howe, undated, and M. Raper of Thorley Hall, 9 July 1765, on the method of Israel Lyons and George Witchell for correcting observed distances. There are also a number of tables on the Sun's parallax.

A set of letters sent to Hilda Routh, George Airy's eldest daughter, during her honeymoon in September 1864 by George Airy, his wife Richarda, Hilda’s sisters, Christabel and Annot, and brother Hubert. The letters are of a personal nature and are originally tied together with string.

Contains material relating to family history (MS Add. 10214/1) and letters (MS Add. 10214/2) including:
hints for an excursion letter to Monsieur Verrier, 1864; letters to Professor Sedgwick, 1846-1847; letters to daugther and son-in-law, Mr and Mrs Routh 1866-1884; notes written by Hilda Routh 1898; postcard to S.W. Coles 1940.

A set of papers relating to George B. Airy and his family, particularly Wilfred Airy. Includes correspondence, obituaries of George Airy, items relating to the erection of an obelisk at Playford, miscellaneous historical papers, and a substantial set of family photographs.

As a young researcher in Astronomy at the University of Cambridge, Craig Mackay was tasked with trying to observe the optical counterparts to detected radio pulses from space.

Directions on how to play an astronomical game for children called Zodiac, for the most part in verse, 19 folios. A letter is pasted to fo. 19 to an undesignated addressee from J. Wallis [publisher], Strand, 16 April 1808. On fo. 1 is the title 'The Zodiac', beneath which in another hand is written the date 1804. The correct date is not earlier than 1809, as is shown by the watermark. Inside the front cover appear the bookplate and signature of D.W. Smith.

Four volumes of printed forms (Form No. 10) titled 'Royal Observatory, Greenwich, Computation of Mean Solar Time, in the Year 18-]'. Entries are completed by hand.

The Portsmouth Collection is the principal collection of Isaac Newton's scientific and mathematical papers, including early drafts of the Principia, and his correspondence with Oldenburg, Halley Flamsteed and many of the other most prominent scientists of his day.

A fair copy of a Catalogue of Stars Visible on the Horizon of Calcutta, drawn up by J. W. F. Herschel to accompany the ten feet reflecting telescope sent to his relations including medical doctor, Duncan Stewart, eldest brother of Lady Margaret Herschel, employed by the East India Company, 1825-1855.