Experimental notes, working papers, correspondence and lecture summaries compiled by Charles Wheatstone, 1836-1875, and photographs collected by him in that period. Notably including papers relating to the development and testing of the telegraph, [1836-1960]; descriptions of experiments and test results concerning the measurement of electromotive forces and electrical potential, [1840-1875]; experimental observations on the nature of magnetism, electricity and thermodynamics, including electromagnet design, batteries and dynamos, [1834-1855]; working papers relating to optics including experiments into refraction, colouration of compounds and polarisation, [1850-1875]; drafts of lectures on sound and musical instruments prepared by Wheatstone, [1832-1837]; material relating to the management of the Wheatstone collection of scientific instruments and library, 1890-1992; biographical material relating to the life of Wheatstone, the invention of the telegraph and Wheatstone's musical instrument manufacturing business, with unrelated newspapers, 1757-1975; stereoscopic photographs and glass negatives taken by Roger Fenton, Samuel Buckle, Jules Duboscq and others, featuring landscapes, still lifes, panoramic scenes of cities including Paris and Moscow and the interior and exterior of the Crystal Palace, Hyde Park, Sydenham, 1851, and especially the Exposition Universelle, Paris, 1855, [1850-1901]; artefacts from Department of Physics, King's College London, including demonstration equipment, telegraph apparatus, a nail fiddle and other prototype musical instruments, [1834-1875]; exhibition of scientific and musical instruments, [1834-1875].

The records of the King's College London Department of Physics comprise minute books, correspondence, staff records, mark books, research notes, lecture notes and texts, inventories of equipment, photographs, press cuttings and printed journal articles and catalogues, [1890]-1984. They notably include minutes and correspondence concerned with departmental equipment and maintenance, 1971-1975; records of staff meetings including arrangements for tutorials and lists of staff publications, 1975-1980; Faculty of Natural Science and Faculty of Education minutes and papers, 1975-1982; correspondence relating to the appointment, training and employment of technical staff by the Department of Physics, 1966-1981; correspondence relating to the planning of the 150th anniversary of the Department including photographs, display captions and off-prints of articles on Professor James Clerk Maxwell, Professor Owen Richardson and Professor Edward Victor Appleton, 1978; papers concerning the merger of Queen Elizabeth College with King's College, 1981-1984; University of London Committee on Academic Organisation: discussion documents, 1979-1981; papers compiled by Professor Ernest Wilson including examination question papers and a mark book on electrical engineering, correspondence concerning the publication of Wilson's research papers and nomination for membership of the Royal Society, and photographs of Wilson and colleagues, [1890]-1928; notes, articles and lecture texts concerning conferences and lectures on crystallography, spectroscopy and X-ray topography, 1978-1981; Departmental equipment order book for the Halley Stewart laboratory, Chesterford Gardens, Hampstead, 1923-1971; data book of experiments conducted in the Department, 1932; inventories of equipment at the Halley Stewart laboratory with record of transfer to King's College London, 1947-1966; printed and manuscript notebooks including databooks describing experiments on resonance, optics and nuclear physics, 1965-1971; Special Physics practical class mark book for experiments carried out by students, with printed guidance notes, 1965-1982; references and testimonials for students, 1947-1970; examination results and records of examiners' meetings, 1976-1981; glass slides of traces of elementary particles through bubble chamber, of graphs and diagrams and laboratory equipment, [1950-1970]; passport size photographs of mainly physics students, but also including some mathematics and chemistry students, 1955-1974; photographs of instruments including early electron microscope and model of DNA, [1955]; photographs of the Wheatstone laboratory physics staff, [1922, 1979]; press cuttings concerning physics staff and students, 1957-1960; offprints of Proceedings of the Physical Society and Proceedings of the Royal Society by Edward Victor Appleton and others concerning ionisation of the earth's atmosphere, the principle of conservation of energy and other topics, 1934-1936; instruction booklets for various pieces of laboratory apparatus including electrical generator and gamma ray detector, 1955-1969. Also outsize teaching diagrams [1850-1870], on subjects including: the mechanics of the telegraph; laying of telegraph cables; hydrostatics; perpetual motion; a water clock (‘clepsydra wheel’); a pendulum bucket engine; bridge construction; eighteenth century designs for a diving bell (ref: KDPY/ILL1-2).

Papers of Professor Jean Hanson, 1938-1975, comprising undergraduate lecture notes; drafts for lectures, revised annually, for undergraduate teaching in zoology at Bedford College, 1938-1948; lectures in Biophysics given at King's College London, 1960-1973; research papers, comprising extensive laboratory notebooks and working papers, 1938-1973, which include ideas for research and comments on current and projected experiments as well as records and observations of work in progress; reports on the work of the Muscle Biophysics Unit; drafts for publications, 1950-1973; unpublished invitation lectures and talks, 1956-1973; scientific correspondence, 1956-1973, including letters exchanged with colleagues whilst at conferences or abroad, detailing research progress; 'Emmeline Jean Hanson' by Sir John Randall, reprinted from Biographical memoirs of Fellows of the Royal Society , Vol 21, Nov 1975.

Correspondence, 1887-1925, mainly between Dendy and fellow academics relating to the morphology and classification of sponges, notably with George Parker Bidder, President of the Marine Biological Association of the UK; Professor William John Dakin, Professor of Zoology, University of Liverpool; Francisco Ferrer Hernandez, Musea de Gencias Naturales, Madrid, Spain; Professor William A Haswell, Emeritus Professor of Biology, University of Sydney, Australia; Ernst Hentschel, Zoologisches Museum, Hamburg, Germany; William Abbott Herdman, University of Liverpool; Professor Sydney John Hickson, Emeritus Professor of Zoology, University of Liverpool; Randolph Kirkpartick, Natural History Museum, London; Professor James Herbert Orton, Emeritus Professor of Zoology, University of Liverpool; Joseph Pearson, Director of the Columbo Museum, Ceylon; and Edgar Thurston, Superintendent of the Government Museum, Madras, India. The correspondence also includes letters, 1919-1921, relating to the establishment of a research grant in memory of Harold Row, Dendy's assistant. Papers, 1886-1899, relating to sponge collections, particularly specimens in Australia and New Zealand, and including the dredging records for Port Phillip, Victoria, Australia, 1887-1890. Lecture notes written by Dendy, [1903-1925], including handwritten texts of lectures on 'Echinodermata', 'The development of starfish', 'Holothurioidea', 'Class Gastropoda', 'Mytilus', 'Anodarta cygnea', 'Helix', 'Mollusca', and 'Merozoa', and typescript texts of public lectures including 'The stream of life', given at a Citizens' Lecture in Edinburgh, 1921, and 'The evolution theory today', given at the Liverpool Meeting of the British Association for the Advancement of Science, 1923. Working notebooks, [1886]-1912, mainly containing scientific experiments and observations relating to sponges, notably the Challenger Amphipoda and the Grantia Compressa, and notes on the topographical distribution of, and biographical references to, sponge specimens. Two notebooks, 1917-1919, recording experiments and observations during Dendy's membership of the Royal Society's Committee for the Investigation of Grain Pests. Papers, 1892, relating to The Victorian land planarians [1894] by Dendy, comprising a volume of annotated and revised extracts from that work, and a letter to Dendy from Thomas Steel concerning flatworm species. Printed obituaries of Dendy, 1925-1926. Papers relating to the study of lizard-like reptiles commonly known as Tuatara (the scientific name being Sphenodon), [1897]-1910, including correspondence, 1908-1910, between Dendy and Edward Bles, Elliot Smith, Annie Howes and [William Thompson] Sedgwick, and catalogues, notes and photographs of Tuatara embryos.