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].

Records, 1878-1939, of King's College London Ladies' and Women's Departments and King's College for Women from inception, and including material postdating absorption by King's College London in 1915. Comprising minutes, 1878-1928, including the Executive Committee of the Ladies' Department, 1878-1902, Committee of Management of the Women's Department, 1902-1910, Committee of Management of King's College for Women, 1910-1913, King's College for Women Delegacy, 1913-1915, Board of Principal Teachers of King's College for Women, 1910-1928, King's College for Women Board of Studies for Home Science and Economics, 1908-1914, and various finance committees from 1891 and other subordinate committees; agendas and draft minutes, 1885-1915; accounts, 1878-1916, comprising annual balances, 1878-1885, termly balances, 1889-1890, printed balance sheets, 1878-1905 (incomplete) with annual reports to the Committee of Management to 1887, comparative statements of income and expenditure, 1904-1916, printed accounts, 1910-1914, estimates, 1913-1915, and memoranda on estimates, 1914-1916; ledgers, 1890-1910, and journal, 1890-1896; cash books, 1890-1919; fees books, 1906-1919, and miscellaneous vouchers, receipts and bills, 1907-1914; warden's outletter books, 1910-1915; general and policy files, 1899-1919, on subjects including scholarships and prizes, courses, staff appointments, incorporation into the University of London, development of the college including establishment of the home science course, proposed amalgamation with King's College, and files relating to administration after amalgamation with King's College London in 1915, including proposed acquisition of a hostel for women; building and maintenance files, 1882-1917, including premises in Kensington Square; student address books, 1894-1917 and undated, most including details of courses being taken; record books, 1897-1918, with students' details; registers of attendance for various courses, 1909-1914; registers, 1878-1919, including exam class lists and lists of students; miscellaneous records, 1901-1914, comprising some student records and a manual of instructions for the Bursar; syllabi and prospectuses, 1878-1916; scrapbooks, 1888-1910, including lecture notices and press cuttings; rough notes summarising a course of lectures on hygiene and sanitation, 1913; printed ephemera, 1888-1923, with material postdating fusion with King's College in 1915, including historical sketch of King's College Ladies' Department, c1902, undated history of nos 11-12 Kensington Square, lectures, reports, prospectuses, and an appeal for the Home Science Department, 1914; material relating to King's College Hostel for Women, 58 Queensborough Terrace, Bayswater, 1921-1939, including minutes of the management committee, ledgers, cash books, wages books and inventory; 16mm film of King's College for Women staff and students, 1927-1928, with explanatory notes; entrance schedules for arts and sciences, 1914-1921, giving students' details; papers and correspondence, 1880-1924, on general administration, buildings and accommodation at Kensington Square and Bayswater, grants to the College, staff appointments, and transfer of King's College for Women to King's College and the future of the Home Science Department.