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Catalogue of the papers and correspondence of ROBERT WILLIAM DITCHBURN FRS (1903 - 1987)


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Reference NCUACS 6/5/88
Covering dates 1919-ca 1988
Held by Reading University Library
Extent 4 boxes
Source of acquisition The papers were received in June 1988 from Mrs Doreen Ditchburn and Professor G W Series, FRS, the author of the Royal Society memoir of Ditchburn.
Creators Ditchburn, Robert William, 1903-1987, scientist and physicist
Related information The University of Liverpool Archives hold 7 notebooks dating from Ditchburn's undergraduate courses 1920-22 (NCUACS 6/5/88/D.367). See appendix.
The Manuscripts Department of Cambridge University Library possesses an early undated notebook recording experiments (Add. MS 8637).
The Admiralty Research Establishment holds a collection of papers relating to Ditchburn's wartime research there.
Mrs Ditchburn retains a little personal material.
UNDERGRADUATE NOTEBOOKS
The University of Liverpool archives holds seven notebooks compiled by Ditchburn while an undergraduate at the University 1920-22, and has provided the following listing which is reproduced here by permission.
Notebooks compiled by Professor Robert W. Ditchburn, F.R.S. whilst a student on the Practical course for the Honours B.Sc. in Physics, 1920-21, deposited by Professor Ditchburn (B.Sc. Maths and Physics 1920, B.Sc. Hons. in Physics 1922), 9 Summerfield Rise, Goring, Reading, RG8 ODS, 2 June 1986, and 13 June 1986, and 20 February 1987.
NCUACS 6/5/88/D.367
Notes
1. Professor Ditchburn entered the University in October 1919 at the age of 16 years, having attended Bootle Secondary School and obtained the Higher School Certificate (in Maths, Physics and Chemistry, with French as Subsidiary) in 1917. By permission of the Faculty of Science Professor Ditchburn was exempted from the Intermediate B.Sc. examination and was allowed to sit the Final Examination for the B.Sc. (Pass Degree) in Maths and Physics in June 1920, which he passed First Class. The degree of B.Sc. Honours in Physics was conferred on Professor Ditchburn in July 1922. During Session 1923-24 Professor Ditchburn was a registered external research student, working on 'the atomic nucleus'. During Sessions 1919-20 to 1921-22 inclusive Professor Ditchburn held a Bibby Scholarship (see The University of Liverpool Calendar 1919-20 p.431) and also a Pennington (Peace) Scholarship [awarded by Bootle County Borough Council].
2. Professor Ditchburn was successively Professor of Natural and Experimental Philosophy in Dublin University, 1929-46, and Professor of Physics at the University of Reading, 1946-68. He became a Fellow of the Royal Society in 1962.
For fuller details see the entry for Professor Ditchburn in Who's Who 1986, p.471.
Professor Ditchburn contributed his Reminiscences (of his student career at Liverpool and Cambridge), as chapter one, to Rajkumari Williamson (ed.), The Making of Physicists (Adam Hilger, Bristol, 1987).
3. For a few more details about the Physics courses see the Faculty of Science Prospectus of Courses Session 1920-21. The University of Liverpool's Calendar 1920-21 indicates that, apart from Professor L.R. Wilberforce, the following were then the members of the academic staff of the Department of Physics: Mr. J. Rice (Senior Lecturer), Mr. R. Ablett and Mr. E. Edwards (Demonstrators and Junior Lecturers), and Mr. J.E. Crackston (Oliver Lodge Fellow). Professor Ditchburn believes that the Practical course which he took was supervised by Professor Wilberforce and Mr. Ablett. The notebooks provide no evidence of the names of the supervisors (who occasionally tick the results of the experiments) with the sole exception of Experiment No.11 which is ticked by J.E.C. [Crackston], 25 April 1921.
4. Professor Ditchburn thinks that he had about 10 lecture notebooks in all, but that he does not think there is any likelihood that he will locate further volumes.
5. NCUACS 6/5/88/D.367/7 was, with the agreement of Professor Ditchburn, transferred by the Keeper of Archives and Manuscripts, University of Reading, in February 1987. Professor Ditchburn deposited this volume with the Keeper on 21 June 1967 (ref. Acc. No.544) whilst he was Professor of Physics at the University of Reading.
6. The death of Professor Ditchburn was recorded in the 11 May 1987 issue of Precinct (University of Liverpool).
NCUACS 6/5/88/D.367/1-2 Notebooks (illustrated by diagrams, graphs, etc.) compiled by Professor Ditchburn whilst a student on the Practical course for the Honours B.Sc. in Physics, Session 1920-21:-
1. Notes on the method followed in writing up the results of the experiments, followed by notes on the experiments (the following brief details being taken from the list of contents of the volume):- (1 vol.)
1. Elasticity of a copper wire
2. Viscosity
3. Self-Induction
4. Mutual Induction
5. Coefficient of Restitution
6. Newtons Rings
7. Cardinal Points
8. Surface Tension
9. Frequency of Fork
10. Low Resistance (a) Lord Rayleigh's method
(b) Lord Kelvin's method
11. Focal Length of Objectives Covers period from 12 Oct. 1920 up to 17 Feb. 1921.
2. Notes on experiments (the following brief details being taken from the list of contents of the volume):- (1 vol.)
12. Diffraction Phenomena
13. Fresnel's Biprism
14. Thermoelectric E.M.F.
15. Resistance of Electrolyte (Kohbrausch's method)
16. Capillary Electrometer
17. Hysteresis (Magnetometer)
18. Hysteresis (Ballistic)
19. Resolution of Telescope
20. Quarter Wave Plate
21. Convergent Light Polariscope
22. Conductivity of Metal Bar
23. Thermoelectricity
24. Conductivity of Glass
25. Indices of Iceland Spar
26. Saccharimetry
27. Focal Line
28. Focal Planes and Principal Planes of a Ramsden Eyepiece
Covers period 21 Feb. 1921 onwards.
Loose in the volume: typescript (carbon copy) instructions for conducting an experiment to determine the velocity of light by measurement of the ratio of the electro-magnetic to the electro-static unit of capacity, n.d.
NCUACS 6/5/88/D.367/3 Notes on lectures given on Course F [Mathematical Physics] in the Department of Physics, 27 Oct. 1920, 3 Nov. 1920, and n.d. [Oct. and Nov. 1920]. (1 vol.)
Loose in the volume: two sheets of notes on [a] lecture given on the same course, 29 Nov. 1920.
Above the name of R.W. Ditchburn at the front of this volume appears the signature of 'Alex Irving'. Professor Ditchburn cannot recollect Mr. Irving but presumes that he must have given him a part-used notebook, the first few pages of this notebook having been cut out. [There appears to be no reference to Mr. Alex Irving as a student at the University: there is no Student Dossier for him and he does not appear in the lists of graduates given in the Calendars.]
NCUACS 6/5/88/D.367/4 Notes on lectures given on Course F [Mathematical Physics] in the Department of Physics, (1 vol.)
10 Dec. 1920 (sic) ('Tensors (cont.)' [continued from notes on undated lecture Tensors in NCUACS 6/5/88/D.367/3], 12 Oct. 1920, and 19 Nov. 1920.
Across a majority of the pages is written "Copied" indicating that a fair copy of the notes was later made.
These notes are written in a "Notes of Lectures. University of Liverpool" notebook bought from Philip, Son and Nephew, Ltd., University Booksellers, 3, Bedford Street, N., Liverpool.
NCUACS 6/5/88/D.367/5 Notes (a) on lectures "XXIII - XXIX" on Magnetism and Electromagnetism [probably given by Mr. James Rice, Senior Lecturer in Physics] (1 vol.) on pages paginated 1-201, the odd numbered pages only being used for these particular lectures.
n.d. [?1921-22]
(b) on lectures X - XXI on Magnetism and Electromagnetism on pages paginated 128-2, the even numbered pages only being used for these lectures (e.g. 128, 126, 124, etc.)
n.d. [? 1921-22]
Loose in the volume: notes on "reciprocal M. Lauberts for five point graphs" (1 sheet)
NCUACS 6/5/88/D.367/6 Notes on lectures [I] - IV and unnumbered on Electro-magnetic Theory, Dispersion, and Magneto-optics, [probably given by Mr. J. Rice subsequently to those in NCUACS 6/5/88/D.367/5] n.d. [? 1921-22] (1 vol.)
At the back of this volume (which is numbered "II") are:-
(a) Notes [on a lecture on] "some mathematical theorems", and
(b) Notes on Professor H.A. Lorentz's "Rede" Lecture on Maxwell's Electromagnetic Theory, delivered at Cambridge on 15 May 1923.
NCUACS 6/5/88/D.367/7 Notes on lectures given in the Department of Physics:- (1 vol.)
(a) (pp. 1-219, odd numbered pages only being used)
Electricmagnetic Theory lectures [I] - VI given by Mr. James Rice, [Senior lecturer in Physics]. 12 Jan. 1921 - n.d. [?Feb. 1921]
(b) (pp. 124-234, even numbered pages only being used; start at the other end of the volume to (a)).
Note on the Telegraphic Equation, n.d. [?Feb. 1921], followed by notes on lectures on Physical Optics,
4 march 1921 - 11 March 1921, and brief notes on Lecture X on Convergent Light, 17 March 1920.
These notes are written in a notebook on which the name and coat of arms of The University of Liverpool appear on the cover.
Bibliography For a full account of the life and career of Ditchburn see G W Series' Royal Society memoir 'Robert William Ditchburn 1903-1987', on which the above outline has freely drawn.
Note Compiled by Peter Harper and Timothy E. Powell
The work of the National Cataloguing Unit for the Archives of Contemporary Scientists, and the production of this catalogue, are made possible by the support of the following societies and organisations:
The Biochemical Society
The British Library
The City of Bath
The Geological Society
The Institute of Physics
Pergamon Books
The Royal Society
The Royal Society of Chemistry
The Society of Chemical Industry
ACKNOWLEDGEMENTS
We are very grateful to Mrs Doreen Ditchburn for making available her husband's papers, and to Professor G W Series for a draft of his Royal Society memoir and the material assembled for it.

Administrative history:
OUTLINE OF THE CAREER OF R W DITCHBURN
Robert William Ditchburn was born in Waterloo, Lancashire, in 1903. He attended Bootle Grammar School (where his father, who graduated in Physics from the University of London, was Headmaster) from 1911. At the age of 16 Ditchburn won a Bibby Scholarship to Liverpool University where he was exempted from the first year course because he held a Higher School Certificate in relevant subjects.
Ditchburn passed the Ordinary Degree in Mathematics and Physics in 1920 and gained his BSc Honours in Physics in 1922. He also was successful in the Cambridge University Scholarship Examination and was admitted to Trinity College the same year. As he already had a degree in Physics Ditchburn was excused Part I of the Tripos. He graduated in 1924.
In 1923 Ditchburn had won a four year Senior Scholarship and this, together with the Isaac Newton Scholarship held 1925-28 and various academic prizes, enabled him to study for his PhD at the Cavendish Laboratory under Sir J J Thomson, its former Head.
Apparently with no great hope of success Ditchburn applied for a fellowship at Trinity College Dublin in 1928. He was in fact elected and a year later was appointed Erasmus Smith's Professor of Natural and Experimental Philosophy at Dublin University. Also in 1929 Ditchburn married Doreen Barrett. They remained in Dublin until 1946, except for three years from 1942 during which Ditchburn served as Principal Experimental Officer at the Admiralty Research Laboratory, Teddington.
Ditchburn returned to England in 1946 to take up the Chair of Physics at Reading University. As Head of the Department he oversaw a considerable growth in the study of physics at the University; from 1946 to his retirement in 1968 the staff of the Department increased from three to over thirty. This expansion, which Ditchburn himself thought his single most important contribution to science, culminated in the opening in 1960 of the J J Thomson Physical Laboratory, built on the new Whiteknights site.
An important field of study of the Physics Department, initiated at the suggestion of Sir Francis Simon in 1953, was diamond research, particularly the investigation of the effects of radiation on diamonds. In the years thereafter the University of Reading was to assume a prominent position in this field.
In 1956 Ditchburn was instrumental in forming an international Diamond Research Committee, acting as chairman from its inception until 1982. He served as a consultant on diamonds to De Beers and helped to establish a sound administrative base for the company's research into synthesising diamonds, a project which was eventually successful.
Ditchburn retired in 1968 though he remained active in the fields of diamond research and optics. He also found time to research the illness of Sir Isaac Newton, disputing the suggestion that he died of mercury poisoning.
At about this time Ditchburn became strongly committed to the Pugwash movement and attended the 1967 conference in Sweden. He produced a number of papers for Pugwash meetings on the subject of armaments and the energy crisis.
Ditchburn's Royal Society memorialist identifies his principal research areas as the photo-ionization of gases and vapours, other absorption processes relevant to the upper atmosphere, the optical properties of solids, (especially diamonds) and the effect of eye movements on visual perception. His most important publication, Light, was first published in 1952 and, with revised editions 1963 and 1976, became a standard textbook dealing with all aspects of the subject.
His interest in eye movements may have been inspired by his wartime research at Teddington. In his later years Ditchburn concentrated on this topic, publishing his second major work, Eye Movements and Visual Perception, in 1973, five years after retirement.
Ditchburn's scientific achievements were recognised with numerous honours and awards. He was elected to the Fellowship of the Royal Irish Academy 1930, serving on its council twice, 1933-1939 and 1942-1943. He was made a Fellow of both the Physical Society (1943) and the Institute of Physics (1949). In 1952-1955 he was on the council of the Physical Society and was vice-president 1958-1960, delivering the Society's Thomas Young Oration in 1959. Ditchburn then served a further two years as vice-president of the newly-merged Physical Society and Institute of Physics.
He was elected a Fellow of the Royal Society 1962 and served on several of its committees. He was also on the British National Committees for Physics, Astronomy and Radio-Science and the National Subcommittee for Optics 1948-1966 (chairman from 1961).
In addition to these and other positions and honours Ditchburn was a Fellow of the Optical Society of America and in 1983 was awarded the prestigious C E X Mees Medal for his contribution to optics research.

Contents:
SECTION A BIOGRAPHICAL NCUACS 6/5/88/A.1-NCUACS 6/5/88/A.43
SECTION B PUBLICATIONS AND LECTURES NCUACS 6/5/88/B.1-NCUACS 6/5/88/B.59
SECTION C DIAMOND CONSULTANCY With an introductory note NCUACS 6/5/88/C.1-NCUACS 6/5/88/C.22
SECTION D SCIENTIFIC CORRESPONDENCE NCUACS 6/5/88/D.1-NCUACS 6/5/88/D.34
SECTION E NON-PRINT MATERIAL NCUACS 6/5/88/E.1-NCUACS 6/5/88/E.11
The collection, although small in size, offers a respectable amount of biographical material, material relating to Ditchburn's principal publications and diamond research at Reading and some scientific correspondence.
Section A, Biographical, consists of Ditchburn's own material relating to his career, including curricula vitae and a typescript copy of his 'Reminiscences' for The Making of Physicists, and letters containing the recollections of colleagues, students and friends sent to G W Series while he was compiling the Royal Society memoir. The final draft of the memoir is at NCUACS 6/5/88/A.1.
Section B, Publications and Lectures, comprises a chronological sequence of notes, drafts, correspondence and other material relating to Ditchburn's publications and lectures. Unfortunately his university lectures and seminars are represented only by NCUACS 6/5/88/B.4, a notebook for lectures given by Ditchburn probably while professor at Trinity College Dublin.
There is a considerable body of material relating to the English language editions of Light (NCUACS 6/5/88/B.8-NCUACS 6/5/88/B.30).
At the end of the sequence is a small subsection (NCUACS 6/5/88/B.57-NCUACS 6/5/88/B.59) devoted to Ditchburn's work for the Pugwash movement, principally papers and lecture notes on armaments and energy.
Section C, Diamond Consultancy, is a chronologically presented sequence of, mainly, correspondence between Ditchburn and colleagues in South Africa regarding progress in research at Reading.
Section D, Scientific Correspondence, consists of letters arranged alphabetically by correspondent, chiefly about light and vision. It includes a 1935 letter from Sir J Chadwick (NCUACS 6/5/88/D.8) thanking Ditchburn for recommending him for the Nobel Prize in Physics which he received that year. Also of interest is a letter Ditchburn sent in 1975 to the Burmah Oil Company suggesting that their investment in research into achieving nuclear fusion through laser systems was unlikely to have any commercially viable result (NCUACS 6/5/88/D.6).
At NCUACS 6/5/88/D.12 is 1970 correspondence with D Fishlock, science correspondent of the Financial Times, who enquired about a second world war government campaign encouraging the consumption of carrots as an aid to night vision.
Section E, Non-print material, is largely group photographs taken at various conferences. There is also a photograph of students at the Cavendish Laboratory 1927 (NCUACS 6/5/88/E.1). NCUACS 6/5/88/E.11 is a tape-recording of a lecture by Ditchburn on Sir J J Thomson.



SECTION A BIOGRAPHICAL  NCUACS 6/5/88/A.1-A.43  [n.d.]

Contents:
NCUACS 6/5/88/A.1 - NCUACS 6/5/88/A.8 Biographical and Autobiographical
NCUACS 6/5/88/A.9 - NCUACS 6/5/88/A.27 Career, Honours and Awards
NCUACS 6/5/88/A.28 - NCUACS 6/5/88/A.43 Material re Royal Society memoir of Ditchburn

Biographical and Autobiographical  [no ref. or date]

Biographical and Autobiographical  NCUACS 6/5/88/A.1  n.d

Contents:
'Final' draft of G W Series's Royal Society memoir of Ditchburn. 39pp typescript with a few ms additions and corrections.

Biographical and Autobiographical  NCUACS 6/5/88/A.2  1987-1988

Contents:
The Times obituary of Ditchburn, 15 April 1987.
Obituary in University of Reading Bulletin, May 1987.
Obituary for Ophthalmic and Physiological Optics.
5pp Typescript with ms note '2nd half of 1987 or early 88'.

Biographical and Autobiographical  NCUACS 6/5/88/A.3  1960-c1969

Contents:
Curriculum vitae with notes on papers published.
4pp Typescript, 14 January 1960.
Curriculum vitae, 1p typescript, 1969 or later.

Biographical and Autobiographical  NCUACS 6/5/88/A.4  1966-81 and nd

Contents:
Requests for biographical information with information provided by Ditchburn.

'Reminiscences', The Making of Physicists, Adam Hilger  NCUACS 6/5/88/A.5-A.8  1987

Administrative history:
Ditchburn was the first of eighteen senior physicists who recounted their student days for The Making of Physicists.

'Reminiscences', The Making of Physicists, Adam Hilger  NCUACS 6/5/88/A.5  c1987

Contents:
'Reminiscences by R.W.Ditchburn', 9pp typescript.

'Reminiscences', The Making of Physicists, Adam Hilger  NCUACS 6/5/88/A.6  July-November 1985

Contents:
Correspondence, chiefly with the History of Physics Group of the Institute of Physics who commissioned the book,

'Reminiscences', The Making of Physicists, Adam Hilger  NCUACS 6/5/88/A.7  September-November 1986

Contents:
Correspondence with the History of Physics Group re recollections of the Kapitza Club,

'Reminiscences', The Making of Physicists, Adam Hilger  NCUACS 6/5/88/A.8  c1987

Contents:
Publicity material re The Making of Physicists, with covering letter.

Career, Honours and Awards  [no ref. or date]

Career, Honours and Awards  NCUACS 6/5/88/A.9  1919-22

Contents:
University of Liverpool Award of Bibby scholarship, testimonials and degree certificates.

Career, Honours and Awards  NCUACS 6/5/88/A.10  1924-25

Contents:
Trinity College Cambridge Menu for Sexcentenary of Michaelhouse Commemoration Dinner, Michaelmas 1924; correspondence with Sir J J and Lady Thomson.

Career, Honours and Awards  NCUACS 6/5/88/A.11  1926-27

Contents:
Trinity College Cambridge Quarterly bill from Trinity College; invitation from Sir J J and Lady Thomson to meet P Painlevé, the French mathematician and politician; testimonials (probably for Ditchburn's application to Trinity College Dublin) from Sir J J Thomson (2), R Vere Laurence and R H Fowler.

Career, Honours and Awards  NCUACS 6/5/88/A.12  21 February 1928

Contents:
Letter from A S Eddington re a vacancy in Australia for a Chief Assistant at the Commonwealth Solar Observatory, Canberra

Career, Honours and Awards  NCUACS 6/5/88/A.13  1928

Contents:
Trinity College Dublin Newspaper cuttings recording Ditchburn's election as Fellow; letters of congratulation from Lord Rayleigh and L R Wilberforce; letter from J L Synge offering to nominate Ditchburn for the Fellowship of the Royal Irish Academy.

Career, Honours and Awards  NCUACS 6/5/88/A.14  23 April 1929

Contents:
Letter from E Rutherford with advice on 'organising the Course' at Trinity College

Career, Honours and Awards  NCUACS 6/5/88/A.15  1936

Contents:
Material re application for Chair of Physics, Birmingham University, 1936.
Includes letters from J Chadwick, Rutherford and Thomson promising support.

Career, Honours and Awards  NCUACS 6/5/88/A.16  1945

Contents:
Letter from Lord Rayleigh agreeing to give Ditchburn 'a reference for the Aberdeen post', 31 January 1945.
Letter from C P Snow (Tutor, Christ's College Cambridge) re the possibility of Ditchburn returning to Cambridge, 15 June 1945.

Career, Honours and Awards  NCUACS 6/5/88/A.17  1946

Contents:
Material re appointment to Chair of Physics, Reading University
Includes typescript copy of Ditchburn's curriculum vitae and letter of congratulation from J A Crowther, whom he succeeded.

Career, Honours and Awards  NCUACS 6/5/88/A.18  16 June 1953

Contents:
Menu for Trinity College Cambridge Annual Gathering Dinner,

Career, Honours and Awards  NCUACS 6/5/88/A.19  May 1955

Contents:
Correspondence re Ditchburn's resignation as a Home Office Regional Scientific Adviser for Civil Defence

Career, Honours and Awards  NCUACS 6/5/88/A.20  n.d

Contents:
Material re the opening of the J J Thomson Physical Laboratory 1960, and its 25th Anniversary 1985.

Election to Fellowship of the Royal Society.  NCUACS 6/5/88/A.21-A.24  [n.d.]

Election to Fellowship of the Royal Society.  NCUACS 6/5/88/A.21  c1962

Contents:
Telegram informing Ditchburn of his election and letter from H W Florey, PRS, inviting him to lunch at the Society, 15 March 1962.
Mrs Ditchburn's ms list of those from whom congratulatory letters and telegrams were received.

Letters and telegrams of congratulation.  NCUACS 6/5/88/A.22-A.24  [n.d.]

3 folders

Arrangement: In alphabetical order.


Letters and telegrams of congratulation.  NCUACS 6/5/88/A.25  c1964

Contents:
Correspondence with H D Kramer re Ditchburn's acceptance of a Senior Foreign Scientist Fellowship offered by the US National Science Foundation, 1964.

Letters and telegrams of congratulation.  NCUACS 6/5/88/A.26  July 1968

Contents:
Telegrams and letter sent to Ditchburn upon his retirement

Letters and telegrams of congratulation.  NCUACS 6/5/88/A.27  1981

Contents:
Optical Society of America.
Letter informing Ditchburn of his election to Fellow Emeritus, 8 December 1981.
Photocopy from Physics Today, November 1983, re award of the Society's C E K Mees Medal to Ditchburn.

Material re Royal Society memoir of Ditchburn  [no ref. or date]

Contents:
Correspondence assembled by G W Series during the preparation of his Royal Society memoir, the final draft of which is at NCUACS 6/5/88/A.1.

Material re Royal Society memoir of Ditchburn  NCUACS 6/5/88/A.28  n.d

Contents:
Correspondence from Mrs Ditchburn to Series.
Copy of letter sent by Series to colleagues of Ditchburn requesting recollections.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.29-A.43  [n.d.]

Arrangement: In alphabetical order.


Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.29  n.d

Contents:
Admiralty Research Establishment, Teddington, re Ditchburn's wartime research on optics.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.30  n.d

Contents:
Allibone, T E.
Blakemore, C, re significance of Ditchburn's work on physiology of optics.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.31  n.d and 1987

Contents:
British Pugwash Group, re Ditchburn's contribution to Pugwash. Includes copy of obituary from Pugwash Newsletter, 1987.
Clark, C D, re Reading University.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.32  n.d

Contents:
Dyer, H B, re Ditchburn's (and Reading University's) contribution to the diamond industry. Includes 4pp typescript essay with tributes from Dyer, F C Frank and D Tabor and 2pp typescript list of postgraduate students from Reading who studied diamonds for their Ph.Ds.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.33  n.d

Contents:
Evans, T, re Reading University and De Beers consultancy.
Fellgett, P B, re Reading University.
Frank, F C, re Diamond Conferences and Pugwash.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.34  n.d

Contents:
Gregg, A H, re Trinity College Dublin. Includes 3pp typescript recollections.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.35  n.d and 1987

Contents:
Heavens, O S. Includes an obituary written for Physics Bulletin, July 1987.
Heddle, D W O, re Reading University.
Holt, J C. Gives permission to Series to use extracts from his The University of Reading: the first fifty years (1976), with formal letter from Reading University to the same effect.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.36  n.d

Contents:
Hopkins, H H. Letter re Ditchburn's role in Optica Acta and correspondence with Mrs Ditchburn and Royal Society re unpublished paper by Ditchburn on 'Nuclear Winter'.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.37  n.d

Contents:
Institute of Physics re Ditchburn's role in both the Institute and the Physical Society. Includes 2pp photocopy of the citation for the award of the 1959 Thomas Young Oration.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.38  n.d

Contents:
Kelly, A, re Reading University.
Lang, A R, re Diamond Research Conferences.
Marr, G V, re Reading University.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.39  n.d

Contents:
Mills, I M. Includes address delivered at Ditchburn's funeral.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.40  n.d

Contents:
Oxford University Press. Permission to quote from Ditchburn's two contributions to The Oxford Companion to the Mind.
Pitt, H.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.41  n.d

Contents:
Royal Irish Academy. Material re Ditchburn's membership of the Academy including photocopies of his certificate of candidature and list of his papers published in the Academy's Proceedings.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.42  n.d

Contents:
Seaton, M J. Includes note on Ditchburn's work on photo-ionization.
Smith, S D. Includes note on research at Reading.

Correspondence with friends and colleagues of Ditchburn, and with institutions with which he was associated, arising from Series's request.  NCUACS 6/5/88/A.43  n.d

Contents:
Steele, J P, re Trinity College Dublin.
Walton, E J S.
Wright, W D.
Wynne, C G.

SECTION B PUBLICATIONS AND LECTURES  NCUACS 6/5/88/B.1-B.59  [n.d.]

Contents:
NCUACS 6/5/88/B.1, NCUACS 6/5/88/B.2 Bibliographies
NCUACS 6/5/88/B.3 - NCUACS 6/5/88/B.56 Publications and Lectures
NCUACS 6/5/88/B.57 - NCUACS 6/5/88/B.59 Pugwash Movement

Bibliographies  [no ref. or date]

Bibliographies  NCUACS 6/5/88/B.1  n.d

Contents:
Typescript lists of publications.

Bibliographies  NCUACS 6/5/88/B.2  n.d

Contents:
Typescript lists of papers on 'Eye Movements and Vision with Stabilised Images' and 'vacuum spectroscopy' published by members of the Reading University Physics Department, including Ditchburn.

Publications and Lectures  [no ref. or date]

Publications and Lectures  NCUACS 6/5/88/B.3  15 November 1932

Contents:
Letter from Sir J J Thomson re a series of draft papers Ditchburn had sent him. Thomson advised him 'to send these papers as they stand'.

Publications and Lectures  NCUACS 6/5/88/B.4  1935-1947

Contents:
Loose leaf notebook with ms lecture notes, probably for Ditchburn's Trinity College Dublin courses.

Publications and Lectures  NCUACS 6/5/88/B.5  n.d

Contents:
Notebook with Ditchburn's ms notes on various subjects including 'The place of Technique in Science and Art' which may have been the basis for his published lecture of 1939 'The technician in art, science and industry'.

Publications and Lectures  NCUACS 6/5/88/B.6  1944

2pp typescript + 3pp tables

Contents:
Admiralty Research Laboratory, 'Interconversion tables for photometric units', 27 October 1944.

Publications and Lectures  NCUACS 6/5/88/B.7  1945

35pp typescript + 1p index, 2pp references, 1p table, 9pp figs.

Contents:
Admiralty Research Laboratory, 'The uses of red and orange light in the Services', 6 June 1945.

Light  [no ref. or date]

Contents:
NCUACS 6/5/88/B.8 - NCUACS 6/5/88/B.14 First edition, Blackie and Son 1952
NCUACS 6/5/88/B.15-NCUACS 6/5/88/B.23 Second edition, Blackie 1963
NCUACS 6/5/88/B.24-NCUACS 6/5/88/B.30 Third edition, Academic Press 1976

First edition  NCUACS 6/5/88/B.8-B.14  [n.d.]

First edition  NCUACS 6/5/88/B.8  1945-1946

Contents:
Outline plan, 1p typescript; contract with Blackie, July 1945; letter from publishers, 20 December 1946.

First edition  NCUACS 6/5/88/B.9  n.d

Contents:
Outline plan of Light, 15pp typescript with ms annotations. Found with the contract.
Ms notes on previous books by other authors on light.

First edition  NCUACS 6/5/88/B.10  n.d

Contents:
Ms notes beginning 'Consider a sphere of radius a containing N molecules with an assigned molecule at the centre O'. 4pp. Not in Ditchburn's hand but found with material re Light (1st ed.).

First edition  NCUACS 6/5/88/B.11  1953-1954

Contents:
Booklet advertising Light; reviews of Light, 1953; letter from Ditchburn re corrections and alterations, 30 September 1954.

First edition  NCUACS 6/5/88/B.12-B.14  1958-64

3 folders

Contents:
Correspondence with publishers and readers arising from publication of first edition, Arranged alphabetically.

Second edition  NCUACS 6/5/88/B.15-B.23  [n.d.]

Second edition  NCUACS 6/5/88/B.15  1963-65 and nd

Contents:
List of journals to receive review copies of Light.
Reviews of second edition of Light

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.16-B.23  [n.d.]

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.16  1963-70

Contents:
Blackie and Son Ltd.

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.17  1957-1964

Contents:
Braddick, H J J, re revision of Light in view of Bellevue Conference. 1957
Emeléus, K G, re ambiguities in Light 1964

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.18  1985-1966

Contents:
Eno, R 1965
Free, J, re spectra of energy 1965
Hargreaves, C M 1966

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.19  1960-1963

Contents:
Heavens, O S 1963
Hopkins, H H 1962
Institute of Physics and Physical Society 1960

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.20  1966-1967

Contents:
Long, J F, re reference to single photon interference. 1967
Mykura, H 1966

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.21  1965

Contents:
Robinson, E, re experiments on diffraction of light through cloth.

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.22  1960-1965

Contents:
Smith, R A 1960
Speer, R J, re EUV grating study. 1965
Taylor, A M, re Taylor's review of Light in Contemporary Physics. 1963

Correspondence re second edition arranged alphabetically.  NCUACS 6/5/88/B.23  1960-1963

Contents:
Thames and Hudson Ltd 1963
Walsh, J W T 1960
Wapniarsky, W J 1963

Third edition  NCUACS 6/5/88/B.24-B.30  [n.d.]

Third edition  NCUACS 6/5/88/B.24  [n.d.]

Contents:
Plates for Light.

Third edition  NCUACS 6/5/88/B.25  [n.d.]

4 pp typescript

Contents:
Prefaces for third edition

Correspondence re third edition  NCUACS 6/5/88/B.26-B.30  [n.d.]

Arrangement: Arranged alphabetically.


Correspondence re third edition  NCUACS 6/5/88/B.26, B.27  1971-75

2 folders

Administrative history:
Academic Press published the third edition after Blackie and Son declined to issue a revised edition.

Contents:
Academic Press Inc

Correspondence re third edition  NCUACS 6/5/88/B.28  1971

Contents:
Blackie and Son Ltd

Correspondence re third edition  NCUACS 6/5/88/B.29  1973-81

Contents:
Heavens, O S
Heavens contributed a number of short sections to the third edition. The correspondence chiefly concerns the subjects that should be covered and the payment of royalties.

Correspondence re third edition  NCUACS 6/5/88/B.30  1977-80

Contents:
Miscellaneous correspondence.

Correspondence re third edition  NCUACS 6/5/88/B.31  1954

4 pp typescript

Contents:
Letter from J L Synge on a note, 'Representation of an unstable particle', sent him by Ditchburn. Synge claims to be 'quite incompetent to judge' but suggests Ditchburn 'go ahead and publish it and see what happens!' 15 February 1954.
With copy of the note dated 1 February 1954,

Correspondence re third edition  NCUACS 6/5/88/B.32  1960

Contents:
Brief correspondence from P Rosbaud, July 1960, enclosing letter from Sir G P Thomson declining editorship of book. Both Rosbaud and Thomson express the hope that Ditchburn would be willing to undertake this task.

Correspondence re third edition  NCUACS 6/5/88/B.33  June-August 1965

Contents:
Correspondence with the Television Society re invitation to give the 1966 Fleming Memorial Lecture
Ditchburn declined the invitation because of a visit abroad.

Correspondence re third edition  NCUACS 6/5/88/B.34  1966-1969

Contents:
'Eye Movements', Encyclopaedia of Linguistics, Information and Control, 1969.
Letter from editor thanking Ditchburn for his article, 10 June 1966.

'Joseph John Thomson, Nobel Prize in 1906'  NCUACS 6/5/88/B.35-B.39  1968

Archival history:
Found with drafts of the article and related correspondence were memorabilia of the 1926 Cavendish Laboratory celebrations (NCUACS 6/5/88/B.37-NCUACS 6/5/88/B.39).


Related information: Further material relating to Thomson may be found at NCUACS 6/5/88/A.10, NCUACS 6/5/88/A.11, NCUACS 6/5/88/A.15, NCUACS 6/5/88/B.3 and NCUACS 6/5/88/B.42, with a tape-recording of a lecture by Ditchburn on Thomson at NCUACS 6/5/88/E.11.

Administrative history:
Ditchburn was approached by Fratelli Fabbri Editori, an Italian publishing company, to write an article on Thomson for a volume on Physics Nobel prizewinners. Thomson was Ditchburn's supervisor at the Cavendish Laboratory 1924-28.

'Joseph John Thomson, Nobel Prize in 1906'  NCUACS 6/5/88/B.35  April-December 1968

Contents:
Correspondence with Fratelli Fabbri Editori; contract for article; note accompanying payment of fee.

'Joseph John Thomson, Nobel Prize in 1906'  NCUACS 6/5/88/B.36  n.d

Contents:
'Joseph John Thomson, Nobel Prize for Physics 1906'. Two slightly different 12pp typescript copies of article.

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.37-B.39  [n.d.]

Administrative history:
1926 saw both the seventieth anniversary of the foundation of the Laboratory and Sir J J Thomson's seventieth birthday. The two events were celebrated together.

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.37  18 December 1926

Contents:
Menu for Cavendish celebration

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.38  18 December 1926

Contents:
'Cavendish Laboratory Supplement', Nature,

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.39  n.d

Contents:
Reproductions of signatures of past and present workers in the Cavendish Laboratory, bound in hard covers and labelled 'J J T 1856-1926'.
Presented to Thomson in recognition of his 'contributions to theoretical and experimental physics'.

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.40  n.d and 1973

2 pp typescript

Contents:
Letter from Royal Netherlands Academy of Arts and Sciences, 9 May 1973, re publication of papers read at symposium on Light and Sight.
Two 'Comments' on points raised at symposium,

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.41  1973-1975

Contents:
Eye Movement and Visual Perception, Clarendon Press, 1973.
Reviews 1973-75, with letter from L A Riggs re his review for Contemporary Psychology, 23 July 1974.

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.42  1977

5 pp typescript

Contents:
'Reminiscences of the Cavendish Laboratory 1922-28', Physics Bulletin, 1977.

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.43  n.d and 1978

Contents:
'Thomas Smith, FRS', Dictionary of National Biography Supplement 1961-1970.
Request from editor for a notice of Smith's life, February 1978; 'final copy' of Ditchburn's draft, 2pp typescript + 1p typescript notes for editor; letter to Ditchburn from J Preston with 3pp ms notes on Smith; photocopy of 'appreciation' of Smith by K J Habell.

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.44  April, August 1978

Contents:
Correspondence with P B Fellgett, re two articles by Ditchburn and A E Drysdale published in Proc. Roy. Soc, 1977 and 1978.

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.45  1979

Contents:
'The relation between retinal-image movement and rotation of the eye', Optica Acta 26 (1979).
Abstract only.

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.46  1980

4 pp typescript

Contents:
'The function of small saccades', Vision Research 20 (1980).

Memorabilia of the 1926 Cavendish Laboratory celebration.  NCUACS 6/5/88/B.47  1980

4 pp

Contents:
Ditchburn's ms notes on 'Parallel Visual Pathways: a review', by P Lennie, Vision Research 20 (1980).

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.48-B.53  [n.d.]

Administrative history:
Ditchburn disputed the conclusion reached in two 1979 articles in Notes and Records that Newton's death resulted from mercury poisoning, putting forward an alternative case that he died of a breakdown brought on by clinical depression.
As Ditchburn held the Isaac Newton Scholarship at Cambridge 1925-28, his interest in Newton was fitting.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.48  1979

Contents:
Correspondence with J M A Lenihan re the use of hair samples to obtain evidence of mercury poisoning, 1979.
Includes copies of two articles by Lenihan, 'Hair and History' and 'Mercury and Man'.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.49  n.d

Contents:
Ms notes on Newton's health.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.50  n.d

Contents:
Ms notes on clinical depression.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.51  n.d

Contents:
Ms notes and background information on mercury poisoning.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.52  n.d

Contents:
Miscellaneous correspondence re Ditchburn's article, including letter from M Wolbarsht, co-author of article maintaining the mercury poisoning theory.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.53  n.d

Contents:
Photocopies and cuttings re the debate on Newton's death.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.54  1984

Contents:
Copy of letter from W M Dalton to editor of Encyclopaedia Britannica, 20 October 1984, re errors in entries on 'electromagnetic radiation' and 'light', the latter being a contribution by Ditchburn.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.55  1985

Administrative history:
The book, Optics, written with O S Heavens was nearing completion at the time of Ditchburn's death.

Contents:
Letter to B W Petley in which Ditchburn mentions his interest in optical experiments on relativity in connection with a book he is writing, 7 May 1985.

'Newton's Illness of 1692/3', Notes and Records of the Royal Society 35 (1980).  NCUACS 6/5/88/B.56  1987

Contents:
'Stabilization of Retinal Images', The Oxford Companion to the Mind, OUP, 1987.
Correspondence re illustrations, 14 January 1987.

Pugwash Movement  [no ref. or date]


Related information: See also NCUACS 6/5/88/A.31.

Administrative history:
Ditchburn attended his first International Pugwash Conference in 1967 at Ronneby in Sweden. He also attended the 1972 Oxford Conference and that held in Munich 1977, at which he gave a paper on 'Factors which Determine the Level of Armaments' (NCUACS 6/5/88/B.58). Ditchburn also contributed to two international Pugwash symposia in London 1980 and 1985. He was an active member of the British Pugwash Group and it was at one of their meetings on 8 April 1987 that he suffered a fatal heart-attack.

Contents:
The material includes two papers delivered by Ditchburn to international Pugwash meetings, together with a number of undated papers and sets of lecture notes.

Pugwash Movement  NCUACS 6/5/88/B.57  1979

Contents:
Letter appealing for funds sent out by Ditchburn as 'the "youngster" in the UK Pugwash Executive'

Pugwash Movement  NCUACS 6/5/88/B.58  n.d and 1977-1980

Contents:
Typescript drafts and notes.
'Factors which Determine the Level of Armaments', Pugwash Conference, Munich, 1977, 5pp + 1p abstract.
'Assessment of Dangers in New Weapons', Pugwash Symposium, London, 10-12 December 1980, 4pp (photocopy), last page missing.
Untitled draft on nuclear weapons, nd, 2pp.
Notes on nuclear energy, nd, 1p.

Pugwash Movement  NCUACS 6/5/88/B.59  n.d

Contents:
Ms lecture notes.
'Nuclear Energy and Governmental Problems', nd, 7pp + 1p list of slides.
'Energy Policy', nd, 2pp.
'Alternative Scientific Programmes', nd, 3pp.

SECTION C DIAMOND CONSULTANCY  NCUACS 6/5/88/C.1-C.22  [n.d.]

Arrangement: The material, chiefly correspondence between Ditchburn and Industrial Distributors' Diamond Research Laboratory in South Africa, is presented in a chronological sequence 1954-69. The catalogue entries indicate the principal topics of the correspondence.


Administrative history:
From 1955 Ditchburn, and many of his colleagues and students in the Physics Department of Reading University, undertook consultancy work for Industrial Distributors (1946) Ltd, a subsidiary of the South African mining company De Beers.
Among the projects with which Ditchburn was associated was the attempt to emulate the success of the General Electric Company (GEC) of America in synthesising diamond, which had been subject to US government embargo because of its strategic significance. Ditchburn was able to recommend to De Beers an administrative structure for the project, which greatly contributed to its success in 1959.
H B Dyer of De Beers, in an account sent to Ditchburn's Royal Society memorialist, described the diamond research conducted by Ditchburn and his Physical Properties of Materials Group at Reading as '.... the single most important contribution by a single institute to this subject'. (NCUACS 6/5/88/A.32).
Ditchburn was also a founder member of the Diamond Research Committee 1956-86, serving as chairman to 1982, and played a major part in the Diamond Conferences which it organised.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.1  1954

4 pp typescript

Contents:
Coloration and decoloration of diamonds by irradiation; increasing diamond fluorescence ('sparkle') by surface chemical treatment.
Includes 'Report on diamond polishing' by H B Dyer,

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.2  1955

Contents:
Coloration and decoloration of diamonds; synthesising diamonds.
Includes letters re GEC's and ASEA Sweden's attempts to produce artificial diamonds, March.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.3  1956

Contents:
Patenting of new decoloration process for blue diamonds.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.4  1957 Jan-May

Contents:
Coloration and decoloration of diamonds; 1957 Diamond Conference.
Includes notes on discussions between P J Oppenheimer, W A Chapple and Ditchburn re 'Reading Scheme', 3pp typescript. With report by Ditchburn on diamond research at Reading, 5pp typescript.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.5  1957 June-Sept

Contents:
Patent for decoloration of blue diamonds; 1957 Diamond Conference.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.6  1957 Oct-Dec

Contents:
Acquisition of specimens of synthetic diamond from GEC; Diamond Research Committee; polarisation of luminescence in diamond; absorption edge spectrum of diamond.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.7  1958 Jan-May

Contents:
Diamond Research Committee; efforts to acquire specimens of synthetic diamond from ASEA Sweden.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.8  1958 Aug-Dec

Contents:
New metal evaporation technique; patenting of diamond coloration process.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.9  1959 Jan-June

Contents:
Chemical coloration of diamonds; 'Stigma' research programme.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.10  1959 July-Nov

Contents:
Diamond Conference 1959; irradiation of diamonds.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.11  1960 Jan-May

Contents:
Diamond Research Committee.
Includes report on diamond research at Reading University, 3pp typescript + 3pp list of papers 1952-60, and summary of paper 'The Anisotropy of Magnetoresistance in semiconducting diamond' by P J Kemmey and E W J Mitchell, 1p typescript.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.12  1960 June-Oct

Contents:
Framesite; irradiation of diamonds.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.13  1961 Jan-Mar

Contents:
Visit to UK by J F H Custers, Director of Research at the Diamond Research Laboratory; annealing radiation damage in diamonds.
Includes letter dated 24 February on Sir Gordon Sutherland's announcement to the Royal Society the previous evening that the National Physical Laboratory had successfully synthesised diamonds.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.14  1961 Apr-July

Contents:
E M Wilks's research programme at Reading; 'Moissan's diamonds'.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.15  1961 Aug-Oct

Contents:
'Chemical' method of drilling diamonds; patent on production of artificial diamonds; coloration of diamonds.
Includes 'The coloration of small diamond brilliants by electrical bombardment' by J F H Custers and F A Raal, 6pp typescript + 1p captions + illustration, and 'Electronic properties of diamond' by E W J Mitchell, a report on research topics at Reading, 5pp typescript.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.16  1961 Nov-Dec

Contents:
Early attempts to synthesise diamonds.
Includes 'Comments by C D Clark on "Coloration of Diamonds by Electron Irradiation"', 4pp typescript.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.17  1962

Contents:
Colour measurement of diamonds.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.18  1964

Contents:
T Evans's attempt to bond diamond particles by plastic deformation.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.19  1965

Contents:
Plastic deformation of diamond.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.20  1967

Contents:
Letter and abstracts from S K Dickinson re his research on diamonds, 18 December.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.21  1968

Contents:
'Proposals for the continuation of financial support for diamond work at Reading', 10pp duplicated typescript.

DIAMOND CONSULTANCY  NCUACS 6/5/88/C.22  1969 and nd

Contents:
Ditchburn's copies of covering letters sent with diamonds returned to South Africa, 3 February 1969.
'Replies to the questions asked about surface properties of diamond', nd, 5pp typescript with ms note 'Joint with Trevor E[vans]'.

SECTION D SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.1-D.34  [n.d.]

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.1-D.3  1950

3 folders

Contents:
Arnulf, A
Re night vision.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.4  1969-1970

Contents:
Bach-y-Rita, P 1970
Includes note on V S S system for Bach-y-Rita. 1p typescript.
Blackie and Son Ltd 1969-70
Re reprinting Roberts' Heat and Thermodynamics.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.5  1942-1984

Contents:
Blume, S S 1966
Branton, P 1984
Re Rapid Eye Movements (REMs).
Broderick, ?T S 1942
Re problem of statistical methodology.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.6  1967-1985

Contents:
Buchsbaum, G 1985
Re colour perception.
Burmah Oil Co. Ltd 1975
Re laser fusion.
Burr, D C and Morrone, M C 1982
Butler, C C 1967

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.7  1985

Contents:
Campbell, F W
Includes note on 'Shadows of the Retinal Blood Vessels', 2pp ms + 2pp ms diagrams.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.8  n.d and 1935-1966

Contents:
Chadwick, J
Chadwick thanks Ditchburn for recommending him to the Nobel Committee. He received the Nobel Prize for Physics 1935. 1935
Clark, C D nd
Constable and Co. Ltd 1966
Cotton, ? A 1949

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.9  1966-1967

Contents:
Cratchley, E M 1966
Re producing variations in colour on stretched film by sound waves.
Dale, S 1967

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.10  1966, 1973

Contents:
Dyson, J
Principally re flash tubes.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.11  n.d and 1967

Contents:
Einstein, A nd
Photocopy of letter to E Pringsheim re polarisation of resonance radiation.
Emeleus, K G 1967
Re scattering of light.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.12  1970-1981

Contents:
Eric Bateman and Partners 1981
Re lenses.
Fellgett, P B 1976
Fishlock, D 1970
Fishlock, Science Editor of The Financial Times, wrote to Ditchburn enquiring about the scientific basis for the claim, made during a second world war government campaign, that eating carrots aided night vision. Ditchburn replied that through experiments it was ascertained 'that the average change [in night vision] was favourable but was not statistically significant'.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.13  1927-1976

Contents:
Franck, J 1927
Re pressure-broadening of spectral lines and Doppler effect.
Gaardner, K 1965
Garlick, G F J 1976
Re shadows of retinal blood vessels

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.14  n.d and 1980

Contents:
Ginsborg, B L 1980
Glazebrook, R T nd
Letter to Ditchburn written between 1929, the date Ditchburn was made Professor at Dublin University, and 1935, the year of Glazebrook's death.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.15  1966-1976

Contents:
Goldberg, L 1966
Granit, R A 1967
Card thanking Ditchburn for his congratulations on Granit's receipt of the Nobel Prize for Medicine.
Gunn, A D G 1976

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.16  1946

Contents:
Harper, W R
Letter re Harper's reconsideration of 'my diffraction paper' ('On the obliquity function to be used in the approximate theory of diffraction', Proceedings of the Cambridge Philosophical Society 25 (1929)).
With 5pp typescript notes 'Mature reflections on Proc. Camb. Phil. Soc. 25 (1929)', and reprint of original paper with Harper's ms corrections and additions, 1946.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.17  1967-1982

Contents:
Hilger and Watts Ltd 1967
Hopkins, H H 1972
Innisfree Electronics for Cathode Ray Images 1982
Re C R T Image Generator.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.18  1960-1978

Contents:
Institute of Physics 1978
Re reducing the size of the Institute's committee structure.
Jenkins, ?I G 1960
Kantor, W 1967

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.19  1978-1980

Contents:
Kelly, D H 1978, 1980
Includes letter of thanks for Kelly's hospitality during visit to California, 1980. With notes on papers by Kelly, 2pp typescript.
Lindberg, D C 1978
Re Lindberg's book Theory of Vision. With note on the camera obscura, 1p typescript.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.20  1975-1980

Contents:
Logvinenko, A 1975
Mackay, D M 1980
Re paper by Mackay in Vision Research 19 (1979).
MacLeod, D 1980

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.21  1965-1983

Contents:
Medical Research Council 1965-66
Re project F A I R (Fast Access Information Retrieval).
Motz, H 1983
Copy of letter from P B Fellgett re draft of Motz's paper 'A Model for the Electrosimulation of the Nervus Acusticus, which Motz originally sent to Ditchburn.
Nissel and Co. Ltd 1981
Peelle, R W 1974-75

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.22  1966-1980

Contents:
Pickford, R W 1966
Re anomaloscope.
Pigassou, R 1976
Pike, E R 1980
Re damage damage threshold for lasers.
Includes calculation on damage threshold, 2pp typescript.
Pirenne, M H L 1966

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.23  1972-1982

Contents:
Precision Optics Ltd 1972
Riggs, L A 1982
Re Riggs' receipt of Ives Medal; measurement of eye movements during a blink.
Robson, J 1978
Rogers, G L 1980
Re system to 'back off' the natural curvature of the cornea.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.24  1974-1977


Related information: See also NCUACS 6/5/88/D.31

Contents:
Rosenfeld, A R 1977
Re testing spectacle lenses.
Royal Society 1974, 1976
Includes 1976 National Academy of Sciences of USA 'Affirmation of Freedom of Enquiry and Expression' circulated to all members of Royal Society, with Ditchburn's letter to Lord Todd, PRS, explaining why he felt unable to sign the declaration.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.25  1978-1981

Contents:
Schmidt, M J 1978
Re scleral contact lenses.
Seal, M 1981

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.26-D.28  1947

3 folders

Contents:
Searle, G F C
Principally re optical fringes and wedges.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.29  1971-1980

Contents:
Series, G W 1972
Sheppard, N 1980
Re Royal Society memoir of Sir Gordon Sutherland, note on Sutherland's work on diamonds.
Smith, R A 1971
Spillmann L A 1976
Re stabilized vision.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.30  1932-1981

Contents:
Thomson, J J 1932
Troscianko, T 1981
Re the Hermann grid illusion.

SCIENTIFIC CORRESPONDENCE  NCUACS 6/5/88/D.31  1970-1972


Related information: See also NCUACS 6/5/88/D.24

Contents:
Whitcomb 1970
Re testing strength of lenses.
Wright, W D 1972

Wynne, C G  NCUACS 6/5/88/D.32  1958

Contents:
Re Babinet's Principle, with 2pp typescript note.

Wynne, C G  NCUACS 6/5/88/D.33  1958

Contents:
Material found with above, in folder labelled 'Physical Optics - Misc.'
'The diffraction of light by a transparent cylinder immersed in a medium of nearly the same refractive index', 3pp typescript.
Photograph, unidentified.
2pp ms calculations headed 'Obstacle Microscope'.

Wynne, C G  NCUACS 6/5/88/D.34  1951-1970

Contents:
Zikmund, V 1970
Re dedication of book Slovensko vo fotografii by K Plicka to Ditchburn.
Unidentified 1951
Re zone-plate.
With 'selection of figures' headed 'X-zone-plate', 2pp typescript.

SECTION E NON-PRINT MATERIAL  NCUACS 6/5/88/E.1-E.11  [n.d.]

NON-PRINT MATERIAL  NCUACS 6/5/88/E.1  1927

Contents:
Group photograph of members of the Cavendish Laboratory 1927.
Four colleagues are identified on the back, [H J J]Braddick, Paul White, [W A H] Rushton and [C G C] Chesters. The photograph is dated May 1926 and 1927 in different hands. The latter is probably correct; Rushton only returned to Cambridge (where he had been an undergraduate) in 1927 from University College Hospital London and neither he nor Chesters signed the Cavendish Laboratory tribute to Sir J J Thomson in 1926 (NCUACS 6/5/88/B.39).

NON-PRINT MATERIAL  NCUACS 6/5/88/E.2  1947

Contents:
Photographs taken at the Inaugural meeting of the Preparatory Committee of the International Commission for Optics, Prague, 2 June 1947.
Includes group photograph with key.

NON-PRINT MATERIAL  NCUACS 6/5/88/E.3  1950

Contents:
Group photograph of the Conference on the Properties of Semi-Conducting Materials, Reading University, 10-15 July 1950.

NON-PRINT MATERIAL  NCUACS 6/5/88/E.4  20 October 1966

Contents:
Photographs from Sir James Chadwick's seventy-fifth birthday party

NON-PRINT MATERIAL  NCUACS 6/5/88/E.4A  c1966

Contents:
Group photograph with signatures of those present.

NON-PRINT MATERIAL  NCUACS 6/5/88/E.5  1971

Contents:
Group photograph of EGAS Conference

NON-PRINT MATERIAL  NCUACS 6/5/88/E.6  1973

Contents:
Group photograph of the International Symposium for Synchrotron Radiation Users, Daresbury Nuclear Physics Laboratory, Lancs, 5-7 January 1973.

NON-PRINT MATERIAL  NCUACS 6/5/88/E.7  1985

Contents:
Group photograph of the 47th Pugwash Symposium on Strategic Defences, London, 5-8 December 1985.

NON-PRINT MATERIAL  NCUACS 6/5/88/E.8  nd

Contents:
Photographs found in envelope inscribed 'Visit of Physical Society to Pye's in Cambridge'
Includes group photograph.

NON-PRINT MATERIAL  NCUACS 6/5/88/E.9  nd

Contents:
Group photograph of International Commission for Optics Conference, ? Germany
With key.

NON-PRINT MATERIAL  NCUACS 6/5/88/E.10  n.d

Contents:
Mounted photographs and diagrams of the 'Reading normal incidence vacuum monochromator (UV)'.

NON-PRINT MATERIAL  NCUACS 6/5/88/E.11  n.d

Contents:
Tape-recording of Ditchburn's 'Lecture on J J T'.

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