Papers of the Strangeways Research Laboratory, c 1901-1988, comprising papers of T S P Strangeways; annual reports including 1929-1950; minutes and correspondence of the Trustees, 1929-1971; account books and ledgers, 1929-1970; papers relating to funding from various bodies, 1929-1975; papers relating to Medical Research Council funding, c.1962-1969; papers relating to grants, c.1963-1970 and c.1967-1980; administrative records, 1931-1971; general correspondence, 1942-1947, 1954-1956, and 1965-1970; assorted files, 1930s-1960s; miscellaneous historical material including research by George Eric Howard Foxon; minutes of the Radium Commission, 1932-1943; and papers relating to C F Robinow, E M Brieger and Michael Abercrombie.

The papers of John Pearson comprise manuscript notebooks of lectures and experimental write-ups compiled by Pearson when he was a student at Chelsea Polytechnic, 1954-1957, and include notes on electricity, optics, electronics and circuit theory, electromagnetic theory, diffraction gratings, wave mechanics and X-ray physics.

Records of the Röntgen Society comprising: minutes of general meetings, 1899-1927; minutes of Council, 1899-1926; microfilm copies of minutes of the Röntgen Society 1923-1927; letter book, 1913; Röntgen Society list of members, 1903-1917; printed copies of Röntgen Society Year Book and Lists of Members, 1917-1925.

Records of the British Institute of Radiology (BIR) and its predecessors comprising:

minutes of the British Institute of Radiology meetings 1922-1943; Council, 1943-1952; Council and General meetings, 1951-1993; Special General meetings 1934-1960; Medical Committee 1928-1983 ; Museums and Library Committee 1928-1930; Library Committee 1954-1970; Organisation Committee, 1962-1963 ; Physics Committee, 1966-1974; Stanley Melville Memorial Award Committee, 1934-1935; Editorial Committee, 1924-1959; House, Finance and Staff Committee, 1938; Finance Committee, 1939-1944, 1981-1983; Finance and General Purposes Committee 1952-1962; Officers committee, 1977-1994; General Programme Committee, 1959-1992; Developments Committee, 1966; Nuclear Medicine Committee, 1968-1982; Industry Committee, 1928-1981; Radiation Physics Committee 1968-1983; Radiation Protection Committee, 1921-1985; Scientific Committee, 1968-1982; Radiation Hazard Committee papers 1961-1962;

BIR election register, with death dates annotated, 1929-1939; BIR list of members, 1926; Lists of members, 1954-1989; printed copies of BIR Yearbook and list of members, 1930-1950; printed copies of Handbook of the BIR, 1953-1966; proof copy of Handbook of the BIR, 1978 (1 file); BIR Handbook and list of members, 1991;

visitors books, 1958-1998;

papers relating to the Institute's relocation to premises at 36 Portland Place, London, including, papers relating to the appeal for funds, Lord Penny's broadcast, donors and covenants, tender documents, removal plans, architect plans, opening by the Queen, 1977-1984; letters relating to the purchase of the lease for the Welbeck St premises 1922-1924; papers relating to the Special General Meeting, 1953-1954;

BIR memorandum of objects, officers and council, 1925; articles of association, of the BIR incorporated with the Röntgen Society, 1929; royal charter, 1958; BIR Byelaws, 1959; memorandum and articles of the Society of Radiographers, 1920;

papers relating to arrangements and programme BIR Annual Congress 1954-2001; files relating to the International Congress, London 1950, Copenhagen, 1953, Munich, 1969; correspondence relating to the Royal Charter, 1959; papers relating to centenary of X-ray, 1990-1996; papers relating to amalgamation with other radiological and medical associations, 1950-1951;

papers relating to the Royal College of Radiologists' George Simon lecture, 1970s;papers relating to Sugden and Poole's experiments on oxygen tension (undated); offprints and articles by various authors, 1917-1970s;

photocopies of indexes to volumes of Patent Specifications particular to Radiology (original volumes are no longer held by the BIR), 1925-[1975]; files relating to Symposia and meetings papers; Symposium Ossium cash books, 1967-1968;

collection of BIR advertisements from the British Journal of Radiology, 1920-1994;

financial records of the BIR including Register of Seals, 1929-1978; Charities Act 1960 income tax exemptions; List of securities 1926; Detailed balance sheets, 1922-1960 (incomplete); papers relating to BIR voluntary liquidation, 1960; and Stocks and shares - award funds, [1920s];

radiology related material held by the BIR including miscellaneous financial ledger, 1904-1915; Trade catalogues for radiology equipment from various companies, [1930s-1960s]; Vinyl disc recordings (78 RPM) of a lecture given by Lord Rutherford at Goettingen on 14 Dec 1931 (8 discs); Index to transparencies illustration normal subject technique 'Radiology - a routine normal subject technique';

minutes and papers of the Radiology History Committee (now the Radiology History and Heritage Charitable Trust), 1990-1995; minutes, correspondence, and papers of the British Radiation Protection Association, 1984-1991; minutes of the International Congress of Radiology Provisional Committee, Organising Committee, and Grand Committee, 1924-1925; attendance book, 1925;

papers of F G Spear relating to British Radiation Martyrs -presented 1961; copies of letters to and from William Roentgen, 1896-1905; telegram from Lord Kelvin, 1896; news cuttings relating to radium, 1903-1904; volumes of radiographs including W A Coldwell's collection of albums of radiographs 1901-[1918] ; Albums of radiographs, Vol 1, [1896-1898] and Vol 2 [1915]; and album of x-ray plates, (undated).

photograph albums including BIR 22nd Annual Congress, 1961; BIR album compiled by Dr F Gordon Spear, President 1961-1962 [1940s-1960s]; BIR technical exhibition 1967, and 1964; Farewell to No 32 [Welbeck St, 1981]; BIR Portland Place, 1980s; Official opening [of Portland Place premises, 1982]; album of photographs of x-ray tubes, presented by the Physics Department, The City University, 1976; and other photographs 1990-1993;

glass plate negatives collection including images of Röntgen tubes [1879-1911]; X-ray tubes (37 slides) part of collection of slides listed in the 1966 BIR Handbook; large glass plate negatives of Lord Salisbury's hand, 1896; Crooke's hand; fish-lemon sole; A J Balfour's hand 1896; and Lord Kelvin's hand 1896;

x-ray plates, including Lord Salisbury's hand, 1896; and early x-ray glass slides (undated);

hospital records including Guy's Hospital, London, Radiographic Day Book, Edward W H Shenton, 1900; Hospital for Consumption, Brompton, X-ray register, 1914-1915; Middlesex Hospital radium requisition book (carbon copies), Apr 1963;

printed copy of Silvanus Phillips Thompson, his life and letters, J S and H G Thompson, T Fisher Unwin, London 1920 (containing some photos and loose papers relating to Thompson); copy of thesis 'Adult Bronchiectases', Dr Barclay, 1930.

Notebooks of Marie and Pierre Curie comprising holograph note-book containing notes of experiments, etc on radio-active substances, with rough pen-drawings of apparatus, 27 May 1899-4 Dec 1902, produced in Paris and notebook incomplete entitled 'Les rayons, a,b,g des corps radioactifs en relation avec la structure nucléaire' illustrated with a few rough pen-drawn diagrams, produced in Paris.

Papers of Georges Marc Marie Sagnac including holograph papers relating to Roentgen Rays, experiments on sulphur, on optics, light- and sound-waves, and on the ether, 1897-1921.

Papers, c1914-1989, of Dame Kathleen Lonsdale.

Biographical material includes correspondence and papers relating to imprisonment in Holloway Prison, with Lonsdale's own accounts of her time there; diaries and personal notebooks, 1946-1969; letters of congratulation on election as Fellow of the Royal Society (1945); various photographs dating from school to her later years.

Papers relating to Lonsdale's teaching and administrative work at University College London include papers on teaching undergraduate and postgraduate courses; significant documentation relating to laboratory personnel, research funding and general university administration; papers relating to the 'Round Table on Peace Studies', which proposed the establishment of a centre for research into international conflict at the University.

Research material, 1924-1970, consists of Royal Institution papers comprising notebooks, one dating from Lonsdale's first period there (1923-1927), correspondence with colleagues such as W H Bragg and J M Robertson, and Lonsdale's notes and drafts for various research topics; correspondence and papers from her University College years covering many different areas of research, including diffuse scattering of X-rays, thermal vibrations in crystals, methonium compounds and urinary calculi (the latter topic particularly well documented and including several case studies), and including a large group of photographs, mostly of X-ray diffraction patterns.

Papers on the preparation of volumes of the International Tables for crystal structure determination from Lonsdale's chairmanship of the Commission on Tables (1948) comprise drafts, notes and correspondence with colleagues and publishers.

Extensive papers relating to publications, lectures and broadcasts include drafts of articles, on subjects including peace and religious issues, also including obituaries and biographical articles on various individuals, books, book reviews, obituaries, and letters to newspapers and magazines, the latter principally on the issue of atomic weapons; general correspondence concerning publications; drafts of lectures, 1945-1970, including ethics and the role of science in society; a large series of lecture notes, 1933-1970; scripts for broadcasts, on topics ranging from crystallography to religion, 1945-1967.

Papers on foreign and domestic travel, 1943-1971, relating to conferences and lectures, on crystallography, science ethics, and work for the Society of Friends, including her visit to China (1955) and her world tour (1965).

Papers relating to organisations, notably the British Association for the Advancement of Science (BAAS) and the International Union of Crystallography (IUCr), including material relating to a number of International Congresses of Crystallography, also papers relating to participation in Pugwash Conferences on World Affairs, 1958-1970, and papers concerning prison reform and the running of Bullwood Hall Borstal, Essex.

Correspondence, 1927-1974, comprises two main sequences, one arranged alphabetically, the other chronologically; 'day files', principally carbons of outgoing correspondence, 1966-1969; a sequence of references and recommendations; also including correspondence relating to Lonsdale's period of imprisonment (1943). Correspondents include scientists such as Max Born, W H Bragg, W L Bragg, E G Cox, Dorothy Hodgkin, Judith Milledge, L C Pauling and A J C Wilson.

Papers of Sir Hugh Mallinson Rigby, 1904-1927, comprising cases notes, correspondence, watercolour illustrations and photographs relating to patients with gall bladder diseases, 1910-1926; case notes, correspondence and illustrations relating to patients with arterial surgery and arterio-venous aneurism, 1915-1924; and case notes, correspondence, illustrations, photographs, radiographs and X-rays of various medical cases, mostly from the London Hospital, 1904-1927.

Correspondence and documents relating to the commemoration of the fiftieth anniversary of the discovery of X-rays, 1945 with the British Institute of Radiology.

Blood transfusion certificates and reports issued by the British Red Cross Society Blood Transfusion Service, 1926-1939. Also some papers relating to South East London Mass X-Ray Service, 1960-1973.

Papers of Hugh Mervyn Emrys-Roberts, 1951-1972, comprising indexes and notes on 1951-1952 morbidity study of general practice patients including daily list of patients; patient index cards; summary cards; classification of diseases; incidence of certain conditions ; patients X-rayed; relative humidity throughout period 1951/1952; letters and article and paper by Hugh Emrys-Roberts entitled 'The Evaluation of Hospital Output - 1972', c 1972.

Papers of Sir William Henry Bragg include: (Box1) pocket diaries 1924-1942 relating to day to day engagements. (Box2-Box11) Miscellaneous correspondence and notes c1898-1962, relate to various topics such as letters of praise over his lectures and addresses; his work on and observations of crystals and x-rays; his papers and books; honours and meetings. (Box26) Bragg-Rutherford correspondence 1904-1935, relates to letters and discussions between William Henry Bragg and Ernest Rutherford on his work; chairmanships; lectures and publications. (Box28) Father/Son correspondence and autobiography, relates to letters between William Henry Bragg and Lawrence Bragg discussing lectures; laboratory work; working together on research; also contains letters to other correspondents such as H Young and Kathleen Lonsdale; autobiographical notes. (Box37) A B Wood correspondence 1917-1962, relates to William Henry Bragg's work for the Admiralty and continual contact with A B Wood; also includes correspondence between Lawrence Bragg and others on biographical information 1962-1969. (Box12) Research notebooks c1900-1930 relate to his lectures, abstracts of literature and notes by Lawrence Bragg. (Box13) General files on scientific work relate to notes on sound and light; colours from plants; anthracene (under Lawrence Bragg); clay; crystals; paramagnetism and diamagnetism. (Box14-Box16) General files on crystallography relate to various aspects of his work on the subject such as, anthracene and naphthalene; proteins; liquid crystals; diamonds; calcium carbide as well as proofs on the Story of Electromagnetism; draft autobiography and biography; notes for a lecture on the solid state of matter and some correspondence on his research for the Admiralty in the First World War. (Box17) General files on research relate to studies in radioactivity; notes on topics such as focal conics, fluid crystals, nematic liquids and optics; correspondence on topics such as crystallised substances, x-rays, density values and publications. (Box18) Miscellaneous scientific notes and correspondence relate to discussions and drafts for the books Crystallography and X-Rays and Crystal Structure; discussions on other scientists' views for example Debye's 'relaxation time' argument. (Box19) Press cuttings and draft lectures relate to drafts for articles and papers as well as correspondence between Lawrence Bragg and Kathleen Lonsdale on the biography of William Henry Bragg. (Box20-Box24) Reprints 1891-1944 and synopses and reprints of lectures 1931-1942, relate to various publications by William Henry Bragg in journals such as Transactions Royal Society South Australia, Philosophical Magazine and Nature; also includes some articles about William Henry and Lawrence Bragg. (Box25) Medals 1887-1939. (Box27) Royal Institution administrative files 1923-1941, relate to correspondence regarding pupils, studentships, lectures, funding, laboratory work, bye-laws and the Bragg-Paul pulsator, an iron lung to aid artificial respiration (Robert W. Paul). (Box29) Lectures, manuscripts (MSS) and proofs 1938-1941; (Box30, Box32-Box34) lectures and articles 1920-1940; (Box31) lecture notes 1886-1888, relate to lectures, speeches and addresses given by William Henry Bragg at various locations for instance the Royal Society, the RI and those given in Adelaide, Australia, on subjects such as x-ray analysis, crystals, Count Rumford, acoustics and elementary physics; also includes proofs and drafts of articles for journals such as Nature. (Box35) Broadcast scripts 1928-1942, relate to scripts for radio broadcasts on topics such as Michael Faraday, crystals and x-rays. (Box36) Letters of condolence to Lawrence Bragg on the death of William Henry Bragg, Mar-Jun 1942. Notebooks 1904-1913, relate to topics such as radioactivity and x-ray crystallography. Newspaper cuttings (6 volumes) 1913-1940.

Papers of Sir William Lawrence Bragg include: (Box1-Box5) speeches and lectures 1942-1971 (some undated), (Box6) civil service lectures 1964-1966 and (Box7-Box9) school lecture notes 1959-1970, relate to topics such as x-ray analysis, science and industry, science in education, the structure of minerals, atoms and molecules, electricity, light, the Royal Institution of Great Britain (RI) and various acceptance speeches for medals. (Box10) Honours and appointments 1936-1971, relate to correspondence and certificates for honours and positions received from various institutions such as the Cavendish Laboratory, Cambridge and the Royal Society; also includes letters of congratulations for the honours including that of being knighted in 1941. (Box11) Royal Institution relates to salaries, contracts and organisation. (Box12) James Watson's book 1966-1968, relates to correspondence between Watson and Lawrence, as well as other correspondents; reviews and amendments to the book by Watson called The Double Helix. (Box13) Nobel Prizes relates to papers and correspondence over speeches and nominations for the Nobel Prizes (Note these papers are closed until 2021). (Box14) Private correspondence, references, testimonials and Royal Society Fellowships 1954-1984, relate to various issues including writing references for people, personal life and proposals for Fellows of the Royal Society. (Box15) Retirement, appointments, RI internal affairs, Westgate covenant and salaries. (Box16-Box18) Articles 1955-1969, relate to various articles written by Lawrence for newspapers and journals such as the Times Educational Supplement, Acta Crystallographica and New Scientist. (Box19) Visits to the USA 1925-1935, include articles and correspondence relating to visits to institutions in America; writing articles and general RI administration. Several boxes contain various papers including: (Box20) correspondence with Joseph J. Thomson; a report on the (Michael) Faraday film by S R Eade of 1932; a diary of a visit to South Africa; correspondence 1965, relating to the 50th anniversary of winning the Nobel Prize in 1915; correspondence relating to R J Seeger's paper on Michael Faraday; papers relating to the Rutherford Memorial Lecture of 1958 and papers relating to the Bragg Lecture Fund for the RI; (Box 21) correspondence relating to tape recordings of Lawrence in interviews; articles for Nuclear Applications, Acta Crystallographica and others 1967-1968; articles and correspondence for Scientific American 1965-1971 relating to x-ray crystallography; correspondence regarding the writing of a new edition of The Atomic Structure of Minerals by Lawrence,1954-1967 relating to the crystal structures of minerals; (Box22) correspondence relating to Lawrence Bragg's 80th birthday celebrations, 1968-1971; correspondence relating to Isaac Newton and astrolabes; correspondence relating to Lawrence writing the book The Development of X-Ray Analysis; correspondence relating to Lawrence writing a book about physics called Ideas and Discoveries in Physics; (Box23) BBC (British Broadcasting Corporation) correspondence 1954-1960, relates to broadcasts made by Lawrence; correspondence relating to the television programme '50 Years a Winner' about the anniversary of winning the Nobel Prize in 1965; (Box24) letters of congratulation from Lawrence to other people 1954-1969; correspondence relating to the editorial board of the Contemporary Physics publication 1964-1969; (Box25) correspondence relating to 'cranks', people who were not genuine or asked for information unrelated to Lawrence's work; correspondence 1962-1971, relating to a new edition of The Crystalline State book by Lawrence; papers relating to a visit to Czechoslovakia 1968-1969; (Box26) papers relating to the disposal of scientific books and journals 1962-1971; papers relating to the distribution of reprints of articles 1967-1969; correspondence 1966-1971, relating to the RI 'Library of Science' series on science subjects reproducing other publications such as the Proceedings of the Royal Institution; (Box27) correspondence with the Field Survey Association 1948-1971, relating to Lawrence's work during the World Wars; Sound Ranging in the 1914-1918 War, refers to papers of 1966-1969 relating to the subject; correspondence on the bubble model film 1954-1971, relating to the silent film on the 'Bubble Model of a Metal' by Lawrence; (Box28) general correspondence 1966-1971, relating to making films of lectures and scientific topics such as x-ray crystallography and molecules and life, by various companies such as the BBC, Anvil Films Limited and the Educational Foundation for Visual Arts; film scripts and correspondence for 'The Nature of Things' series of six broadcasts from the RI by Lawrence for the BBC 1959-1968; (Box29) correspondence 1965-1968, relating to scientific lectures at the Imperial Defence College and Lawrence's involvement in giving them; correspondence 1956-1970, relating to the Institute of Physics and the Physical Society on issues such as naming a medal after Lawrence Bragg; (Box30) invitations to dinners and lectures at numerous institutions, 1966-1971; (Box31) correspondence 1955-1971, relating to functions, articles, books and work for the Lee-Hemming Fellowship Fund, the Lucretian Club, films of school lectures, the Medical Research Council and miscellaneous papers regarding publishers and societies; (Box32) papers and correspondence relating to the Honorary Scientific Advisory Committee of the National Gallery 1955-1970, publications for the New Knowledge journal 1965-1966, 'nice letters to keep' kept by Lawrence 1963-1971, the 50th anniversary of the Nobel Prize won in 1915, 1964-1966, the Nobel Prize winners Max Perutz, John Kendrew, Francis Crick, James Watson and Maurice Wilkins, the Nobel meeting at Lindau in 1971 and obituaries by and information from Lawrence1961-1971; (Box33) lists of publications 1913-1969; press correspondence and cuttings 1955-1968; requests for reprints 1958-1964; correspondence relating to research 1953-1971; (Box34) reviews of papers 1947-1970; correspondence relating to the RI 1966-1971; correspondence and papers relating to the Royal Society and Club 1957-1971; (Box35) correspondence relating to the Royal Society soirées 1965-1968; correspondence relating to the Schools Science and Technology Committee 1969; correspondence relating to Solvay Physics Conferences 1933, 1962-1970; correspondence relating to Trinity College Cambridge 1951-1971; correspondence relating to visitors from overseas 1954-1962; (Box36) a card index to old files of Lawrence's; (Box37) family correspondence 1888-1941; (Box38) correspondence relating to appointments 1954-1962; correspondence relating to giving lectures and writing papers 1939-1960; requests for articles 1959-1967; (Box39) correspondence relating to lectures demonstrations for the American Association of Physics Teachers 1962-1963; correspondence relating to an article in the Saturday Evening Post, the bomb detector and with A. J. Bradley 1938-1963; (Box40) correspondence and scripts for broadcasts 1938-1953; (Box41) correspondence relating to Lawrence as a Canadian liaison 1940-1946; (Box42) correspondence relating to publications and becoming Cavendish Professor of Physics 1938-1963; (Box43) correspondence relating to publications by Lawrence 1921-1937; (Box44) correspondence relating to the English Speaking Union of the Commonwealth, with P. P. Ewald, short films by Lawrence, funds for physicists and the Gemmological Association of Great Britain 1954-1968; (Box45) invitations to functions 1947-1953; (Box46) correspondence relating to the Higher Technical Education Committee, hospital expenses incurred by Lawrence, broadcasts and the Institute of Physics 1943-1965; (Box47) correspondence relating to the Gold medal of the Institution of Royal Engineers, international crystal structure tables and invitations to lecture 1932-1964; (Box48) invitations, correspondence relating to obituaries for R. W. James, papers for the Lawes Agricultural Trust Committee 1953-1968; (Box49/a) correspondence relating to lightning conductors 1959; (Box49/b-c, Box50-Box54/a) miscellaneous correspondence from various recipients on various aspects of Lawrence's work and life, 1942-1968; (Box54/b-c) correspondence relating to the Nuffield Science Project 1963-1965; correspondence with Ray Pepinsky on visits and x-ray analysis 1957-1958; (Box55) correspondence relating to the Pepinsky machine for x-ray analysis, publications and articles, the Physical Society, broadcasting and with Derek J. de Solla Price 1941-1969; (Box56-Box57) personal correspondence of Lawrence Bragg 1944-1966; (Box58-Box59/b) references and testimonials by Lawrence 1925-1958; (Box59/c) letter from J. A. Darbyshire 1932; (Box60) reviews of publications 1933-1946; (Box61) correspondence relating to the Royal Institution Appeal 1966-1968; (Box62/a-b) correspondence relating to RI lectures by Lawrence and others 1938-1952; (Box62/c-Box63/b) texts and notes of RI lectures and speeches 1952-1954; (Box63/c-d, Box64/a) correspondence relating to the Royal Photographic Society and the Royal Society Tercentenary, with press cuttings, 1955-1961; (Box64/b) correspondence relating to the Solvay conferences 1959-1961; (Box65) correspondence and papers relating to the Field Survey Association and the War Office, 1919-1940; (Box66) correspondence and reports relating to sound ranging for the war effort, 1940-1946; (Box67) correspondence relating to 'The Nature of Things' television series 1959-1965; correspondence relating to the Understanding Science magazine, the London International Youth Science Fortnight and London Science Club 1962-1968; (Box68-Box70) correspondence and papers relating to overseas visits to countries such as Portugal, South Africa, Canada, Berlin and India, 1941-1968; (Box71-Box79) research notes and correspondence on topics such as x-ray optics, silicates, alloys, order-disorder and heat curves, 1919-1953; (Box80) desk diaries 1966-1970; (Box81) pocket diaries 1951-1971; (Box82-Box86) correspondence and papers on the International Exhibition, Brussels 1958 including papers on exhibits from the UK to be transported to Brussels for example the 'atom exhibit', the 'crystal exhibit' and the 'living cell exhibit', 1956-1959, with letters to and from William Henry Bragg of 1913-1914; (Box87) material including photographs and ephemera collected by Lawrence for his autobiography; (Box88-Box91) RI administrative files including correspondence, applications for tickets, applications for grants for the Davy-Faraday Research Laboratory, Managers' minutes and papers, school science lectures and Christmas lectures, 1953-1965; (Box92) reprints of papers by Lawrence's students and colleagues 1919-1970; (Box93) correspondence relating to the Friday Evening Discourses at the RI 1954-1967.

Records relating to pregnancy in a dwarf, 1963-1965, include a tape recording (subject matter unknown), glass slides, photographs, x-rays and Bender's subsequent article on the pregnancy, published in the British Medical Journal, 1965:2, p 1116.

Addresses by Louis de Broglie including 1929 Nobel address, a fragment of a series of lectures at the Sorbonne and an address to a scientific conference in Warsaw in 1933.

Notes by W E Ingham describing 'the true nature of the X-ray research carried out by Godfrey Hounsfield in creating the X-ray scanner. The notes also cover the little known but massive involvement of Godfrey and his team in assisting the newly formed EMI Medical Division whilst, at the same time, still continuing their research in the Research Laboratory. The difficult conditions under which Hounsfield worked make the magnitude of his achievement even greater.

'The notes are not a comprehensive history, but they provide a record of some of the key events that may be known only to the Director of the Central Research Laboratory (CRL) and a few others, before the information is lost.'

Papers relating to Outteridge's teaching work at King's College London, 1950-1982, notably teaching and tutorial notes on subjects mainly relating to radiation physics and radiation protection, 1965-1972; texts of lectures on radiation physics written for the Borough Polytechnic, London, 1954-1957 and 1960-[1967]; copies of exam papers for physics and electronics subjects at King's College London, 1969-1982; papers concerning research grants and students, [1970-1980], including a PhD thesis by B L Diffey on 'The spectral distribution of X rays and gamma radiation resulting from multiple Compton scattering', Jun 1973; notes on various computer programmes, and work undertaken with them, [1978]; copies of articles and lectures by Outteridge and others, notably 'A print-out system for scaling units using neon indicators' with K C Lightowlers, 'Photon fluences resulting from multiple Compton scattering' with B L Diffey of Kent and Canterbury Hospital, and articles, 1950-1957, on the conductivity and electron counting properties of diamonds, mainly by Frank Clive Champion, Wheatstone Physics Laboratory; minutes and agendas of the Faculty of Natural Science, 1970-1981, and the Non-Professional Staff Committee, 1975-1978. Papers, 1952-1954, relating to Outteridge's work at the Atomic Energy Research Establishment, Harwell, notably press cuttings relating to work done there, 1952-1953, a teaching manual written by Outteridge on 'The Isotope School Experimental Course in Radioisotope Techniques', 1954, and a set of articles written by Outteridge whilst at Harwell. Papers relating to Outteridge's work as Radiation Protection Officer for King's College, [1971-1988], including information files regarding his duties, 1984-1985; working papers, [1971]-1982; reports from the British Radiation Protection Association, the British Radiological Protection Association and the Institute of Radiological Protection, [1971-1986]; papers and reports, 1962-[1988], of the Association of University Radiation Protection Officers (AURPO), including rules, constitution, AGM papers and newsletters.