Minutes of Visitations of the Royal Observatory Greenwich, together with relevant extracts from the Minutes of the Council of the Royal Society.

Papers of Professor Raphael Meldola, [1866-1907], comprising notes on experiments in qualitative analysis at the Royal College of Chemistry, [1866]; physical lectures by Dr Tyndall, [1867]; course on physics by Dr Guthrie, 1873; notes as a Demonstrator at Science Schools, 1877-1878; research notes, 1879, 1900; diary of eclipse expedition, 1875; lecture notes on organic chemistry, 1885-1890, including coal tar products, 1890; laboratory notes, 1904-1906; correspondence concerning the portrait fund for Sir John Evans, 1899-1900; Perkin Memorial Fund, 1906-1907, including letters from several German chemists; correspondence about a Maccabeans Dinner, 1905; general correspondence, 1862-1915; correspondence concerning a memorial for Herbert Spencer, 1904-1908; and a memorial for James Sylvester, 1897-1900; correspondence on the subject of thinnings in Epping Forest, 1894-1895; a scientific autograph collection, 1864-1907; plus additional autographs and press cuttings 1889-1915.

Papers of Professor James Dwyer McGee, 1937-1979, comprising biographical information; lectures and correspondence, 1954-1979, notably with Patrick Maynard Stuart Blackett, 1955-1972, concerning Imperial College Physics Department and Anglo-Australian Observatory; Bertram Vivian Bowden, 1955-1963, concerning research work and workers; Carnegie Institute of Washington, 1960-1977, concerning McGee's Associateship, research grant; Denis Gabor, 1956-1972; Merle Walker, concerning the installation of a Spectracon, 1962-1979; Imperial College Rectors, 1955-1971; papers relating to Imperial College Physics Department, 1954-1972; papers relating to the Institute of Electrical Engineers, 1954-1968; Institute of Physics, 1965-1976; observatories in Britain and abroad, 1962-1975, including the Royal Greenwich Observatory; Royal Society, 1956-1972, notably concerning grants.

Letters of Nevil Maskelyne on astronomy.

Letters and papers about the affairs of the Greenwich Observatory in the eighteenth and early nineteenth centuries.

Papers of Sir David Gill, [1870-1920], including approximately 1000 letters addressed to Gill, chiefly scientific in content, written in the 1870s and in the first decade of the 20th century; letters relating to awards and orders received by Gill, 1891-1913 and printed report on the initiation and progress of the geodetic survey of Rhodesia.

The collection comprises manuscript notebooks, printed pamphlets, correspondence, a minute book, and photographic and other catalogues, 1768-1970. These notably include notebooks containing descriptions and viewing data relating to astronomical observations carried out at Kew Observatory, Richmond, Surrey, on behalf of King George III, with a printed pamphlet by Nevil Maskelyne, Astronomer Royal, entitled Observations of the transit of Venus over the Sun, 1768-1769; manuscript notebook containing measurements recorded during a test of the accuracy of the H5 chronometer designed by John Harrison, 1772; manuscript notebooks recording daily temperature, barometric, hygrometric and rainfall readings taken at Kew Observatory, Richmond, Surrey, 1773-1840; a printed pamphlet by George Atwood, Fellow of the Royal Society, entitled A Supplement to 'A treatise on the construction and properties of arches' (London, 1804), with manuscript dedication to King George III and related correspondence, 1804-1805; a folio signature book of visits by dignitaries to the George III Museum, 1843-1929; manuscript diary describing the work of the George III Museum including the upkeep of equipment and use of exhibits in experiments, 1850-1880; manuscript minutes of the George III Museum Committee charged with managing the collection, 1880-1885; catalogues relating to the collection, [1841-1970]; correspondence by George Calver, astronomer, relating to telescope design, 1897; series of copper plates and labels advertising the George III Museum, [1841-1926].

Records of Imperial College Field Research Stations, comprising papers relating to Slough Field Station, Berkshire (Hurworth), including correspondence concerning purchase, 1927-1929; stored products research, with the Ministry of Agriculture and Empire Marketing Board, 1930-1933; building development scheme, 1936-1938; sale of land at Hurworth, Berkshire,1931-1949 (KZFA); correspondence concerning grants for fumigation research, construction of fumigation chamber, 1931-1938 (KZFB); correspondence with the Department of Scientific and Industrial Research relating to Slough Field Station, 1939-1954, including research and accommodation arrangements (KZFD);
papers relating to Silwood Park Field Station, Berkshire, 1838-1990, including history, 1947-1990; sale particulars of the estate, 1838 (KZF); correspondence concerning purchase, 1944-1945; academic development, 1947-1953; purchase and letting of Silwood Park Farm, 1951-1957; land development, 1956-1968; Botany Department laboratory space, 1957-1958; Rectors' correspondence, 1965-1976; Sirex Biological Control Unit, 1963-1966; radar tower, 1962-1965; general files, 1971-1986; lease of land for an astronomical observatory, 1948-1959 (KZFG); papers relating to Silwood Park Open Days, 1972, 1989 (KZFH); expansion, 1955-1965, including Shell Parasitology building, 1959-1961; Nematology building, 1955-1961; Rectors' papers, 1955-1965 (KZFK); sale catalogues for Silwood Park, 1944; Ashurst Lodge, Berkshire, 1939 (KZFL); reports on the Overseas Spraying Machinery Centre, Silwood Park, 1955-1980 (KZFO); Silwood Centre for Pest Management, 1984-[1986] (KZFP); correspondence on the purchase of Sandyride House, 1969-1970 (KZFS); development schemes for Silwood Park, 1984 (KZFT);
manorial records for Silwood Park, including court roll of the manor of Sunninghill, 1616-1790 (KZFM);
papers relating to Harlington athletics ground, Middlesex, 1937-1957, including the Development Committee, 1937-1944; purchase and sale of land, 1936-1956 (KZFG7).

Papers of Robert Ernest Cheesman, 1921-1927, comprise sketch maps; notes on survey positions and altitudes, Abbai River, Abyssinia; correspondence, 1925-27; astronomical observations and meteorological notes made at oases in the eastern Najd, Arabia, 1923-24; extracts from diary; topographical sketches; astronomical observations; notes on vocabulary, 'Ojair to Salwa', Arabia, 1921.

Papers of Paul Belloni du Chaillu, 1864, comprise route notes, astronomical observations and calculations, Gabon, 1864; letter from Acra, 25 Aug 1863 and letter from Fernand-Vaz, 7 April 1864 reporting on journey to, and residence on, Fernand-Vaz river and library MSS letters, chiefly of a personal nature, to Sir George Black during the years 1848-1878.

Papers of Gertrude Margaret Lowthian Bell, 1905-1924, comprises twelve notebooks containing archaeological notes, plans of churches and other sites; records of inscriptions including those from Turkey, Iraq, and Syria; one notebook and folders containing astronomical observations from Arabia, 1913-1914 and a notebook by Lesley Gordon for an exhibition at the University of Newcastle, 1994.