The papers are extensive, relating to almost every aspect of Blackett's career in science and public life. There is biographical and personal material including large numbers of letters of congratulation received on the occasion of the various scientific and public awards and honours with which Blackett's achievements were recognised. There are records of his work on particle disintegration, cosmic rays, astrophysics and magnetism in the form of laboratory notebooks, working papers, correspondence, lectures, publications and broadcasts. There is documentation of his activities on various defence projects and as a member of government committees before, during and after the Second World War. Blackett's political interests are represented by material relating to the Association of Scientific Workers, Labour Party discussion groups on science and technology policy and the Ministry of Technology instituted after the Party's 1964 electoral victory. There are records of a wide range of science-related interests such as the history of science and technology, science, education and government, and nuclear weapons and disarmament, and of his overseas activities including material relating specifically to India and that concerned with matters more generally affecting developing countries.

A few lacunae in the surviving material have been identified. There are no documents relative to Blackett's service with the National Research and Development Corporation or the Department of Scientific and Industrial Research and, of his correspondence during the Second World War, only that for 1942 survives.

Original manuscripts of letters to the Royal Society, which are largely scientific. These papers form the raw material from which the Letter Books were compiled. There are many letters of importance, 1613; 1642; 1651-1740.

Copies of letters received by the Royal Society, the originals of which are in the Early Letters collection. The Letter Books were copied (as were the Journal and Register Books) for security reasons. The numbering of the volumes and their chronological range is slightly eccentric. Volumes numbered 1-18 are letters of 1662-1727; within this group, Volume 11 has been extended into two volumes. No Volume 17 was created in order to leave a gap in the series for retrospective copying of original papers. The succeeding Volumes 19-26 overlap in time, giving correspondence for the years 1720-1740. There are also five supplementary volumes providing fair copies of letters omitted from the main run; these are labelled A-B, B-C, D-G, G-H and H-S, the letters being arranged in order of author.

Copy letters and notes by Henry Oldenburg, first Secretary of the Royal Society, prefaced by a note on the volume's presentation by James Douglas, 14th Earl of Morton.

Paper for reading before the Royal Society entitled 'Theora Magnetis explicata e sola virium attractivarum universalium natura, elaborata per Franciscum Intze.....Claudiopoli Transylvaniae MDCCCXXV'.

Copy of a diary kept by Edward Frankland from 1st January 1848 to 25 July 1849.

Copies of the letters of Erasmus Darwin transcribed from original manuscripts or photocopied from published versions by Desmond George King-Hele.

Letters to Sir Arthur Rucker, his wife and daughter, during the late 19th and early 20th century; many of them from scientists, including J J Thompson, William Huggins, Aston Webb, David Gill, N S Maskelyne, A Geikie. Together with assorted notes and ephemera.

Manuscript volume of notes on lectures, with record of attendance at Guy's Hospital, 5 Jun 1849-20 Oct 1849, taken by George Newport Pickstock, including lectures on natural philosophy, Dr Lloyd; chemistry, [Alfred Swaine] Taylor; and physiology, [William Withey] Gull; also records receipts and payments, 1849-1854.

Notes taken from lectures and texts by Martin Tupper and James Tupper 1795-1797, including: 'Lectures on botany by James Edward Smith MD FRS, President of the Linnaean Society, Proprietor of the Linnaean Collection, delivered at the theatre, Guy's Hospital, London, taken by J P Tupper, 1795', manuscript volume of lecture notes with botanical illustrations, 364pp; volume entitled 'Philosophy, 1795' containing Martin Tupper's notes on natural philosophy, probably taken from published works; 'Lectures on botany by James Edward Smith MD FRS, President of the Linneaean Society, delivered in the theatre, Guy's Hospital, 1797', manuscript notes on 18 lectures taken by Martin Tupper on subjects including: the three kingdoms of nature; vegetable anatomy; parts of a plant; the various effects of light upon plants; the seed vessels; the sexual system of plants; the Linnaean system; illustrations of the Linnaean classes and orders. 143pp; 'Babington extracts' - notes on various medical subjects, presumably from lectures by William Babington (1756-1833).Also includes notes of lectures on comparative anatomy by Astley P Cooper, St Thomas's Hospital.

Papers of Maurice Hugh Frederick Wilkins, 1854-2004, including: laboratory notebooks, graphs, data sets, notes, x-ray diffraction photographs and published articles relating to his scientific research, 1948-1976, chiefly his work on the structure of DNA, 1947-1966; correspondence, 1948-2004, with and about scientific colleagues, including Struther Arnott, Allen Blaurock, Francis Crick, Boris Ephrussi, Harriet Ephrussi-Taylor, Bruce Fraser, Meyer Friedman, Raymond Gosling, Leonard Hamilton, John Kendrew, Robert Langridge, Don Marvin, Linus Pauling, Max Perutz, John Randall, Alec Stokes, James Watson and Herbert Wilson. Correspondence, notes and articles, 1950-2003, relating to research on the history of the discovery of the structure of DNA, including: copies of Rosalind Franklin's laboratory notebooks and articles, 1951-1953, relating to her DNA research; correspondence, 1967-2003, with writers on DNA history, including Aaron Klug, Robert Olby, Meyer Friedman, Horace Judson and Watson Fuller; unpublished articles and talks on DNA history by Wilkins, 1975-1987. Drafts, notes, correspondence and collected background research relating to Wilkins' autobiography, The third man of the double helix (Oxford University Press, 2003). Papers relating to Wilkins' education and early career, 1928-1942, including: teenage essays and fiction on the role of science, 1928-1934; notes, articles and photographs, 1937-1938, relating to his student activities, including physics experiments, and photographs relating to his incendiary bomb testing for Cambridge Scientists Anti-War Group, 1938. Correspondence, memoranda, minutes, reports and notes, 1962-1982, relating to the administration of the Medical Research Council (MRC) Biophysics Unit, King's College London (from 1964, the Department of Biophysics), on topics including funding, staffing, equipment provision and teaching. Correspondence, course handouts, student essays (CLOSED) and background material, 1971-1996, relating to the undergraduate course, 'The social impact of the biosciences', created and run by Wilkins, 1972-1982. Correspondence, newsletters and conference papers relating to Wilkins' involvement in political pressure groups, 1968-2003, notably the British Society for Social Responsibility in Science (of which Wilkins was founding President, 1969-1991), Food and Disarmament International (Wilkins' was founding President, 1984-2004), the Campaign for Nuclear Disarmament (CND), and the Pugwash Conferences on World Affairs. Audio recordings, 1972-1996, including lectures by Wilkins on: social responsibility in science; his Eddington Memorial Lectures,Cambridge, 1977-1978, on the history and philosophy of science; nuclear disarmament, 1981; his retirement speech, 1982; the history of DNA.

Private papers of Professor Stephen Finney Mason, [1859-2007], including published articles and reprints by Mason, [1945-1990]; articles and photocopies of articles by others on Mason’s research interests, [1859-2000]; lectures given by Mason; research notes and correspondence, including correspondence about scientists and historians including Professor Reiko Kuroda, Dr Robert Davis Peacock, Professor Mike Lappert, Professor Anthony James McCaffery, Dr George Tranter, Dr M P Melrose, Dr Tom Ziegler, Professor Martin Quack, Professor David Parker, Keith Hutcheon and Dr Jack Morrell.

Manuscript transcription of Johann David Lembke's Compendium Physicæ theoreticoexperimentalis, in usum auditorum concinnatum, 1740 by Nicodemus Pankratien, 1773.

Draft and copy minutes of Royal Society meetings taken by Robert Hooke, the first 120 pages consist of notes taken by Robert Hooke after going through the draft notes of his predecessor, Henry Oldenburg, as Secretary. Remaining pages are notes taken by Hooke as Secretary attending the Society meetings. Includes a folder of loose material which was removed from the folio without noting where they came from before it was acquired by the Society.

Biographical Memoirs notes and papers accumulated by Professor Bryan C Clarke in the process of compiling two Biographical Memoirs of Fellows of the Royal Society: Edmund Brisco Ford FRS (1901-1988); and Arthur James Cain FRS (1921-1999).

Copies of outgoing letters from the President, Officers and Assistant Secretaries. Each page may contain up to four copied documents. Volumes are numbered 1-73 with an additional volume for the period January 1901-November 1904.

A series of (generally) printed material relating to, and commenting on, the Society's activities. The press cuttings and scrap books contain cuttings from newspapers interspersed with other printed matter, and occasionally items of manuscripts. The remaining volumes are concerned with particular events or subjects, such as 'HMS Challenger 1872-1895' or 'National Antarctic Expedition 1899-1904'. There are three types of volumes; the first volume is for the years 1846-1876, but therafter two types of book were kept;

a) biographical - 12 volumes, 1872-1910

b) general, 10 volumes 1885-1910.

These were discontinued for a short period, then merged: 36 volumes, 1918-1976. Thereafter newscuttings were photocopied and kept in monthly bundles.

Papers of Brian S Dyde relating to the Hydrographic Office of the Admiralty and to the hydrographic survey work of the Royal Navy, including surveyor's workbooks, 1959-1973, including astronomical observations for the position of a geodetic station on the Island of Arorae, Jun 1962; and papers relating to the history of the Hydrographic Department.

Manuscript volumes, correspondence and papers by Michael Faraday including material based on original Faraday documents 1809-1961, comprising six volumes in total covering subjects on botany; chemistry; colour; fire eating; galvanism; gas lighting; light; magnetism; meteorology; lightning; preserving drawings; removing glass stoppers; scientific apparatus; details of his visits with Davy to France and Italy 1813- 1814; visits to copper works and state mines in Wales 1819; visit to the Isle of Wight 1824; manuscript notes on lectures given by Faraday to the City Philosophical Society 1816-1819; general observations; experiments; notes including scientific subjects as well as anagrams; etymology; recipes for gin and ginger beer; humour; love; memory; oratory; philosophy; Rochefoucault; Shakespeare; 'Chemical Love Letter.' 1816-1846; chemical notes [1822]; notes on experiments on electric lamps powered by batteries 1854 and a letter to John Tyndall; c 750 manuscript correspondence between Faraday and scientists, politicians and the general public 1812-1867; letters and draft letters by Faraday written from the Royal Institution 1853-1863; committe minutes from a subcommitte set up to conduct experiments in optical glass 1828-1835; papers relating to the wear and production of coinage at the Royal Mint 1835; papers relating to table-turning 1853-1864; Faraday's French passport 1856; notes on Faraday including his illness and his refusal of the post of President at the Royal Institution 1864-1872.

Personal and business correpondence of William Fothergill Cooke, mostly relating to his dispute with Charles Wheatstone, together with legal documents (copies and originals) connected with the case, in 7 bound volumes. Comprising personal correspondence, mainly to Cooke's mother relating to his hopes and expectations of the telegraph. The correspondence is mainly 1836-1841 with fewer letters for 1843, 1844, 1860, 1868, 1869, 1875, 1879 and 1880. There is also correspondence with Latimer Clark both before and after Cooke's death concerning a history of British Telegraphy and a life of Sir William Fothergill Cooke. Copies of this some of this correspondence can be found in Volume VII, and these are easier to read than the extensively crossed originals; Correspondence relating to railway companies, arbitration, and creation of the Electric Telegraph Company. The correspondence also shows the causes of the breakdown of his partnership with Wheatstone, the arbitration process and subsequent agreement to purchase Wheatstone's royalties in the shares; Correspondence between Mr Robert Wilson, solicitor acting for William Fothergill Cooke, and William Richardson, solicitor acting for Professor Wheatstone, relating to the arbitration between Cooke and Wheatstone, frequently concerning sending of drafts of agreement, with amendments, and with arranging appointments for arbitrators, and witnesses for the arbitration; Papers concerned with the arbitration between Cooke and Wheatstone, including bound copies of agreements and articles referred to in the arbitration; Papers submitted to the Arbitrators, Sir Marc Isambard Brunel and John Frederic Daniell in 1841, mainly copies of evidence. They represent Cooke and Wheatstone's cases, and the Arbitrators' decision, with one later patent granted to Sir William Fothergill Cooke. There are also some poems about Autralia or the Central World and Neptune at the end of the volume; Papers concerning assignment by Wheatstone of all royalties and shares to Cooke, including extracts of letters and transfers and assignments of inventions, rights in patents and shares separating Wheatstone and Cooke's business affairs; Copies of letters, mainly from Volume I of the collection made by George Bristow of the successor firm to Wilson and Harrison with the idea of publishing them on the 50th anniversary of the first Patent for the Electric Telegraph. The Volume contains copies of three letters between Bristow and Latimer Clark, and copies of extracts of other letters. Several letters were cut out for publication in 1893. There are also some notes made by a clerk at Bristow's concerning the other original material and its whereabouts, and also references to 'The Electric Telegraph: Was It Invented by Professor Wheatstone?' in two volumes by Sir W F Cooke, 1856-1857. The copies are easier to read than the extensively crossed originals.

Manuscript diaries, 1939-1946, notably covering his command of 2 Corps, BEF, France and Belgium, 1939-1940, his service as Commander-in-Chief, Home Forces, 1940-1941, and as Chief of the Imperial General Staff, 1941-1946, with detailed accounts of meetings and conversations, and comments on personalities. Detailed unpublished memoirs, 1883-1946, written in [1946-1960]. Personal files, 1940-1946, principally comprising copies of official and semi-official correspondence with FM Sir Bernard Law Montgomery, 1942-1945, relating to his commands of 8 Army, Middle East, 1942-1943, and 21 Army Group, North West Europe, 1944-1945; with FM Archibald Percival Wavell, 1st Viscount of Cyrenaica and of Winchester, 1940-1945, relating to his commands in the Middle East, 1940-1941, and India, 1941-1945; with FM Sir (Henry) Maitland Wilson, 1943-1945, relating to his commands in the Middle East, 1943-1944, and as head of British Joint Staff Mission, Washington, 1944-1945; with FM Hon Sir Harold Rupert Leofric George Alexander, 1942-1945, relating to his commands in the Middle East, 1942-1943, and Italy, 1943-1944, and the Mediterranean, 1944-1945; with Lt Gen Sir Kenneth Arthur Noel Anderson, 1942-1945, relating to his commands in North Africa, 1942-1944, and East Africa, 1945; with Adm Lord Louis (Francis Arthur Victor Nicholas) Mountbatten, Supreme Allied Commander, South East Asia, 1943-1945; with FM Sir John Greer Dill, head of British Joint Staff Mission, Washington, 1941-1944; with Lt Gen Frederick Arthur Montagu Browning, Chief of Staff, South East Asia Command, 1944-1945; with Lt Gen Herbert Lumsden, South West Pacific Area, 1944; with Lt Gen Sir Frank Noel Mason-Macfarlane, Governor and Commander-in-Chief, Gibraltar, 1942; and with Gen Wladyslaw Sikorski, Polish Forces, 1941-1943. Papers relating to his role as Chief of the Imperial General Staff, 1941-1946, dated 1940-1951, notably including conference papers for Combined Chiefs of Staff meetings, 1943-1945; semi-official correspondence with Lt Gen Sir Claude John Eyre Auchinleck, 1940-1945, relating to Auchinleck's commands in Norway, India and the Middle East, 1940-1945. Other papers relating to his life and career, 1897-1963, dated 1897-1966, 1992-1993, including letters to his mother, 1906-1920, notably covering his service in India, 1906-1914 and France and Belgium, 1914-1918; texts of his lectures on artillery given at Staff College, Camberley, 1923-[1926]; papers relating to his post-war activities, notably his role as Chancellor of Queen's University, Belfast, 1949-1963, dated 1949-1968; papers relating to ornithology, 1950-1963; published and unpublished articles collected by Alanbrooke and his wife, 1929-1967; texts of his speeches and broadcasts, 1944-1962; photographs, [1902-1963], 1978, 1992, mainly official photographs of Alanbrooke as Chief of Imperial General Staff, 1941-1942. Papers collected by Mrs M C Long in preparation for the writing of Alanbrooke's biography, dated 1954-1958, notably including texts of interviews with friends and colleagues, 1954-1958. Correspondence relating to Alanbrooke's papers and Sir Arthur Wynne Morgan Bryant's books Turn of the tide (Collins, London, 1957) and Triumph in the West (Collins, London, 1959) (both based on Alanbrooke's diaries), dated 1951-1968. Correspondence of FM (Richard) Michael (Power) Carver, Baron Carver, relating to erection of Alanbrooke statue in Whitehall in 1993, dated 1991-1993

The collection consists of approximately 100 items on alchemy and early chemistry, the most notable item being De Secretis Mulierum. The collection also includes manuscripts of lectures given by Sir Henry Roscoe; his notes on solar chemistry work; letters written to him by a number of his peers and his notebook from 1849. The many volumes of letters in the collection includes correspondence with contemporaries such as Robert Bunsen, Michael Faraday, Dmitri Mendeleeff and Louis Pasteur as well as with a number of Presidents of the Chemical Society and the Royal Institute of Chemistry.

Letter from Ernest Clarke of the Royal Agricultural Society of England, 13 Hanover Square, London to [Herbert Somerton] Foxwell, 29 Jul 1897. Mainly discussing the 17th-century writer Samuel Hartlib.

Autograph, with signature.

Typescript of an unpublished book entitled 'Elizabethan Technology or the development of the letters patent protection for inventions'. Also correspondence about the book.

Cartoon called "The Adventures of Isaac Newton" illustrating the attempts by Newton to demonstrate the force of gravity to the Fellows of the Royal Society, published in Viz Magazine, page 5, May 2004.

Letters sent to the Royal Society, its President or Officers. Subject matter is both domestic and scientific. Domestic concerns include such matters as instructions from authors on the publication of papers. The letters on scientific topics appear to be those which were considered of small significance, e.g. giving notice of minor inventions, or appealing to the Society for recognition.

Portrait photographs of Fellows of the Royal Society by the Godfrey Argent Studio.

The correspondence of Sir John Frederick William Herschel, comprising three main groups of documents:
The first series comprises 19 volumes of manuscript letters sent to Herschel, with drafts of his replies (Ref: HS 1-19).

The second series comprises 16 volumes of copy letters from Herschel (Ref: HS 20-25). These are arranged in chronological order and are apparently constructed from Herschel's original letters brought together by a son, Col. John Herschel R.E., for a proposed biography and then returned to their original owners. The biography was never produced. There is some duplication between these versions of finished letters and the rough versions of the same in HS 1-19.
The third series comprises five boxes of unbound manuscript letters, copy books and listings (Ref: HS 25-28) in which there appears information on the copying project, and groups of original letters on particular topics, such as Herschel's involvement in W H F Talbot's photography patent disputes.

Scientific papers sent to the Royal Society, many of which were published in the 'Philosophical Transactions'. As the name implies, the series is a combination and continuation of Early Letters and Classified Papers into the 19th century. Later, the sequence divided into Philosophical Transactions and Archived Papers. From the time that the Letters and Papers (or New Guard Books as they were originally known) were created, none of these original papers were copied into Letter or Register Books. Scientists represented include William Herschel (66 papers) William Watson (36 papers) Henry Baker (32 papers) Everard Home (31 papers), William Stukely (30 papers), and John Smeaton (23 papers). As the series progresses, the character of the documents alters - the earlier decades contain larger numbers of short letters, but by the 19th century most of the manuscripts are in the form of long monographs. The texts are supported by a large quantity of original illustrations throughout the series. This collection provides a virtually unbroken run of presentations by leading 18th century scientists; the few gaps include 1746-1749, when no papers were collected. Occasionally such missing items may be located in the archives of other institutions.

Sir Robert Southwell's Lecture on water at the Royal Society, 8 Apr 1675.

These are letters and papers of various members of the Gregory family including David Gregorie of Kinnairdie; James Gregory, author of Optical Promota; David Gregorie, Savillian Professor of Geometry at Oxford University; James Gregorie, Professor of Mathematics at Edinburgh University and Charles Gregory.

Letters from Sir Robert Moray to his friend Alexander Bruce, Earl of Kincardine, also known as 'The Kincardine Papers'. Bruce was sick of the ague in Bremen for part of this time, and the letters were written to alleviate the tedium of of Bruce's illness, hence ranging over topics which might not otherwise have been the subjects of correspondence. They include accounts of chemical experiments in his laboratory, his interest in magnetism, medicine in all its aspects, horticulture, fuel, whale fishing, its risks and profits, coal mining, water wheels and tide mills, stone quarrying and the various qualities of different stones, the pumping works needed for undersea coal mines at Bruce's home at Culross in Fifeshire, even to the trees whose wood was best for pipelines, and the diameter of the bore best suited to the purpose. Familiarity is shown with mathematical and surveying instruments, with music, and all sorts of mechanical devices and especially clocks and watches, more particularly the taking out of a patent in respect of a clock for use at sea for finding longitude. Bruce is advised on the choice of books over a wide range of subjects. Moray includes anecdotes to amuse his ailing correspondent; he describes his quiet life and is enthusiastic about many of his chemical experiments. Notable at the end of the letters Moray added what he described as his Masonic signature - a pentagram which also occurs in his crest.

Papers of William Sharpey including copy letters, correspondence including from Neil Arnott, George Gabriel Stokes and James Newton Heale and notes by Sharpey, some on Royal Society business.

Letters from various scientists to Walter White, Assistant Secretary of the Royal Society. With occasional material addressed to Charles Richard Weld and others. Usually on Royal Society business.

The archive correspondence can be characterized as the routine treatment of important events. In 1863, for example, Richard Owen wrote to White with brief instructions for his paper describing the feathered dinosaur archaeopteryx. Occasionally the letters are more significant for the Society's history. In an extended note of 1865, ex Royal Society President the Earl of Rosse 'a plain well-grown man, farmer like in appearance' discussed the merits of signing an election certificate for Alfred Lord Tennyson (1809-1892). 'My opinion...was that it would be better to take the broad view and to elect men of great abillity...so as to strengthen the Society in carrying out, in the largest sense, its great object, that of improving natural science'. Tennyson was duly elected, an event which must have pleased White. The assistant secretary had become friendly with the Poet Laureate in the 1850s and White's published diary left a vivid picture of Tennyson reading aloud his Arthurian romances in the offices of the Royal Society.

'Records and recollections' by Arthur Herbert Church, published in Gloucester: John Bellows 1940. Number 4 of 40 copies with 4 photographs and obituaries.

Letters discussing family matters and work from Paul Dirac and his wife Margit Dirac to Esther and Myer Salaman. Einstein had been Esther's supervisor, and provided her with a reference to Cambridge.

Papers, 1930-1962, concerning lectures and publications by Hart, notably correspondence, 1951-1961, mainly relating to lectures on Leonardo da Vinci, aeronautical engineering and other subjects; correspondence relating to the writing and publication of his work, including James Watt and the history of steam power (Henry Schuman, New York, [1949]), 1948, and The world of Leonard da Vinci, man of science, engineer and dreamer of flight (Macdonald, London, 1961), 1960-1962; typescripts of lectures on textile education, 1951, the scientific basis for Leonardo da Vinci's work in technology, 1952, and handicraft instruction; typescript of The world of Leonard da Vinci, man of science, engineer and dreamer of flight (Macdonald, London, 1961), 1960; copies of published articles by Hart on medieval and modern science, 1930-1955.

Microfilms of the Popper papers held at Stanford University, California, including Popper's speeches and writings, correspondence, course material, subject files, biographical files, index cards with the addresses of acquaintances, and selected writings by others.