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].

Chelsea College Secretary's files, 1889-1998. These records reflect all aspects of the academic and administrative work of the College, ranging from strategic planning, building maintenance and finance through to University of London business where applicable to Chelsea College, notably including South-Western Polytechnic and subsequent College schemes and correspondence on the relationship of the College with the University of London, 1889-1985; governance, namely Chelsea College Senate membership, agendas, committees and other business, 1972-1985; Council minutes, agendas and membership, 1972-1987; King's, Queen's and Chelsea (KQC) Management Committee and Joint Policy Committee correspondence and papers, 1983-1985; University of London Senate agendas and minutes, 1983-1985 (Ref: 1985/CAS, 1987/CAS, 1991 CAS); papers relating to major committees such as academic planning group correspondence, 1983-1984; Finance and General Purposes Committee, Planning and Staffing Committee papers, 1983-1985, planning and resources committee papers, 1989-1991 (Ref: 1997/CAS, CAS/GC2); the general running of the College, including patents, 1972-1987; copyright, 1970-1989; College safety, 1977-1985; Data Protection Act, 1985-1987; Students' Union and student welfare, 1966-1985; a proposed merger with Westfield College, University of London, 1982-1987; the Swinnerton-Dyer Committee report documents, 1980-1982; St George's Hospital Medical School papers reflecting administrative concerns, 1976-1986; agreements and contracts with publishing companies and scientific equipment suppliers, 1968-1985; papers relating to the arsenic poisoning of porters at Chelsea College including cuttings and police investigations, 1966-1971, 1998, (Ref: CAS/AD1, 1987/CAS, 1991 CAS); personnel and staff related files including on contracts, salaries, leave entitlements, performance targets, trade unions, principally NUPE and NALGO, staff appointments and lists, 1967-1987; Academic Staff Committee minutes, papers and correspondence, 1969-1985; Technical and Manual Staff Committees, 1971-1985; demonstrators and visiting lecturers, 1975-1981 (Ref: CAS/AD8); papers relating to College property, [1970-1988] (Ref: 1987/CAS, CAS 1989); academic related papers concerning various departments at King's spanning the merger of Chelsea and King's in 1985, including Biophysics, Chemistry, English, Physiology, Spanish, Theology and War Studies, 1977-1989, Chelsea Departmental papers including the Nuffield programme, Library and Computing Department, 1966-1988 (Ref: 1987/CAS, 1991 CAS, 1992 CAS).