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 papers of William Price, chiefly relating to spectroscopic analysis and photoionisation, comprise correspondence, lecture and teaching notes, notes compiled while reviewing scientific articles, original research notes, papers concerning Price's employment as an examiner, obituaries and reprints of journal articles, 1929-1993. These notably include correspondence with colleagues describing projects and experiments and sharing observations and data, 1942-1990; lecture notes and teaching papers compiled by Price on the theory of spectroscopy, theoretical and applied optics, especially microscopy, basic molecular chemistry, electron configurations and bond and dissociation energies of molecules, 1948-1978; notes compiled by Price for the peer review of articles and on Price's own published articles, including on the spectra of halogens, the structure of polyatomic molecules, on water and hydrides, the calculation of ionisation potentials, benzenes and hydrocarbons, the structure of the DNA molecule and natural fibres such as keratin, 1929-1977; original research notes on spectroscopic analysis, especially ultraviolet spectra of rare gases, ethylene, sulphur dioxide and other compounds, 1933-1986; papers relating to Price's work as an examiner including draft and complete examination question papers and correspondence, 1952-1978; papers concerning the membership by Price of various learned societies and attendance at scientific conferences and symposia, 1940-1992; obituaries and newspaper cuttings on Price and other distinguished scientists, 1976-1993; typescript copies and reprints of scientific journals containing articles by Price and others, on topics including spectroscopy, photoionization, ionisation potentials and electron configuration and bond and dissociation energies, 1945-1990.

Geology departmental records at King's College comprise correspondence, diagrams of fossils, exhibition photographs and negatives, 1828-1975. These notably include correspondence between Sir Charles Lyell, Professor of Mineralogy and Geology, King's College London, William Buckland, one time Professor of Geology, University of Oxford, and others concerning glaciation and descriptions of a tour of Italy undertaken by Lyell, 1828-1842; lecture notes on spectra, possibly compiled by Henry Clifton Sorby, geologist and Fellow of the Royal Society, [1859]; printed pamphlets on aspects of geology including microscopy and photography, 1857-1872; large hand-drawn diagrams of vertebrate fossils by Harry Govier Seeley, Professor of Geology and Geography, with Mineralogy, King's College London, [1876-1909]; manuscript catalogue of 200 different minerals belonging to Harry Govier Seeley, [1876-1909]; mounted photographs of Geology Department staff including Lyell, William Thomas Gordon and Professor James Taylor, and of Lyell's family estate, Kinnordy House, Kirriemuir, Scotland, fossils, various landscapes showing geological features and extracts from Lyell's papers, with negatives, for an exhibition marking the centenary of the deaths of Lyell and Charles Wheatstone, held at King's College, 1975; visitors' book, information leaflets and colour transparencies showing the exhibition on Lyell and Wheatstone, 1975; large display case containing the fabric banner commemorating Lyell's presidency of the British Association, 1864.