LINFOOT, Edward Hubert v2

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: Catalogue of the papers and correspondence of EDWARD HUBERT LINFOOTSc.D. (1905 - 1982) Compiled by Peter Harper and Timothy E. Powell Depositedin Cambridge University Library All rights reserved : ON oe University of Bath © * o>. 1989 : , NCUACS 9/2/89 National Cataloguing Unit for the Archives of Contemporary Scientists underthe guidance of the Royal Society's National Committee for the History of Science, Medicine and Technology Catalogue of the papers and correspondence of ’? EDWARD HUBERT LINFOOT Sc.D. (1905 - 1982) Compiled by Peter Harper and Timothy E Powell Deposited in Cambridge University Library All rights reserved University of Bath 1989 THE ROYAL COMMISSION ON HISTORICAL MANUSCRIPTS Report on the correspondence and papers of EDWARD HUBERT LINFOOT (1905-1982) astronomer deposited in Cambridge University Library Reproduced for the National Cataloguing Unit for the Archives of Contemporary Scientists (NCUACS 9/2/89) by THE ROYAL COMMISSION ON HISTORICAL MANUSCRIPTS Quality House, Quality Court, Chancery Lane, London WC2A 1HP 1989 All rights reserved No 89/2 NRA 32058 E H Linfoot NCUACS 9/2/89 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 E H Linfoot NCUACS 9/2/89 LIST OF CONTENTS Items Page GENERAL INTRODUCTION SECTION A BIOGRAPHICAL A.1 - A.10 SECTION B RESEARCH B.1 - B.57 SECTION C CONSULTANCIES C.1l - C.60 SECTION D PUBLICATIONS, LECTURES, CONFERENCES D.1 - D.40 INDEX OF INDIVIDUALS, ORGANISATIONS AND FIRMS il 23 33 39 E H Linfoot NCUACS 9/2/89 3 GENERAL INTRODUCTION PROVENANCE The papers were received in November 1988 and February 1989 from Mrs Joyce Linfoot. OUTLINE OF THE CAREER OF E H LINFOOT Edward Hubert Linfoot was born in Sheffield in 1905. He was educated at King Edward VII School Sheffield and Balliol College Oxford, taking his BA in mathematics with first class honours in 1926. He obtained his D.Phil with a thesis on almost periodic functions in 1928 and spent 1928-29 at Gottingen and 1929-31 at Princeton as the Jane Eliza Proctor Fellow. On his return to England he taught at Balliol until his appointment in 1932 as Assistant Lecturer and then Lecturer in Mathematics at the University of Bristol. In 1935 he married Joyce Dancer, herself an able mathematician, and they had a daughter and son born in 1945 and 1947, respectively. In the years before the Second World War Linfoot's interests shifted from pure mathematics to optics, particularly the Schmidt telescope and related optical systems such as the Schmidt-Cassegrain. Among the factors stimulating his interest in optics were the presence of C R Burch at Bristol, and his conviction that political developments in Germany would lead to war and that optics would have an important role to play in the conflict. In addition to theoretical contributions he mastered the practical skills involved in figuring optical surfaces and in 1939 the Physical Society exhibited a pair of aspheric microscopes constructed by him. During the war Linfoot did substantial work on E H Linfoot Ncuacs 9/2/89 4 photographic aerial reconnaissance for the Ministry of Aircraft Production. He was also associated with N F Mott's research group which worked on a number of urgent technical problems for the Ministry of Supply. In 1948 his professional standing in mathematical optics was recognised by his appointment as Assistant Director and John Couch Adams Astronomer at the Cambridge Observatory; he retired in 1970. His arrival in Cambridge coincided with the development of the EDSAC I computer and he was a pioneer in the use of computers in the solution of optical problems. He continued work on Schmidt and related optical systems and acted as consultant on a number of telescope projects including the Isaac Newton and St Andrews telescopes. In addition to his many scientific papers Linfoot published two books, Recent Advances in Optics in 1955 and Fourier Methods in Optical Image Evaluation in 1964. Linfoot died in 1982 aged 77. For further details of Linfoot's career see the obituary notices in Bull. London Math. Soc. 16 25 (1984) 219-222. (1984), 52-58 and Q.J1 R. astr.Soc. DESCRIPTION OF THE COLLECTION The material is presented in the order given in the List of Contents. The collection is of particular interest for the material relating to wartime research and to consultancies on the design of optical systems for commercial and other organisations. Section A, Biographical, is very slight but includes published biographical accounts and a number of letters from mathematical colleagues. Section B, Research, is predominantly material relating to E H Linfoot NCUACS 9/2/89 5 wartime research which is introduced by Linfoot's own lists detailing his Second World War projects. The Ministries of Aircraft Production and Supply are both represented in the documentation, and there is correspondence with scientific colleagues such as N F Mott of Bristol and L C Martin of Imperial College London and technical papers of the Telecommunications Research Establishment mathematics group. There is some postwar material relating to work on Schmidt and related optical systems. Section C, Consultancies, is presented alphabetically by organisation, and records Linfoot's work for firms and others on both sides of the Atlantic including EMI, Farrand Optical Company and the Perkin-Elmer Corporation. The most extensive documentation relates to the Isaac Newton telescope (presented under Grubb Parsons) and the University of St Andrews telescope. Section D, Publications, Lectures, Conferences, presents a chronological sequence of drafts and related correspondence. The largest body of material relates to Linfoot's unpublished book on almost periodic functions (completed at Princeton 1929-31), and comprises a typescript draft and correspondence with the Clarendon Press Oxford and colleagues in Britain, Germany and the USA. Section D also includes material relating to a mathematics colloquium organised by Linfoot and H Heilbronn at Bristol in 1935 and to postwar optics conferences. LOCATIONS OF OTHER MATERIAL Notebooks recording Linfoot's optics research form an earlier deposit in Cambridge University Library. E H Linfoot NCUACS 9/2/89 Notebooks recording mathematics lectures attended by Linfoot 1924-32 were deposited in the Library of Trinity College Cambridge in 1984. The Library has provided the following list of the material: Notes from lectures on the theory of functions given by G H Hardy at Oxford, 4 vols, 1925-27 and nd Add.Ms.b.179-182 Notes from lectures 2 vols, 1924-25. on the theory of numbers given by G H Hardy at Oxford, Add.Ms.b.183-4 Notes from lectures on transfinite numbers etc., given by G H Hardy at Oxford, 1925 Add.Ms.b.185 Notes from lectures on the distribution of primes given by G H Hardy at Oxford, 1926 Add.Ms.b.186 Notes from lectures G H Hardy at Oxford on Fourier series and the summation of series given by nd Add.Ms.b.187 Notes from )lectures on Dirichlet series given by G H Hardy at Oxford, 1926 Add.Ms.b.188 Notes from miscellaneous lectures given by G H Hardy at Oxford, 1925-28. Add.Ms.b.189 Notes from tutorials on real functions given by A S Besicovitch at Oxford, 1925-26 Notes from Gottingen, 1932 Add.Ms.b.190 lectures on continuous groups given by B L van de Waerden at 1929, and class field theory given by E Artin at Gottingen, Add.Ms.b.191 Notes from Gottingen, lectures on almost periodic functions given by H A Bohr at 2 vols, 1928-29 Add.Ms.b.192-3 Notes from lectures on Waring's problem given by L D Landau at Gottingen, 1929 Add.Ms.b.194 Notes from lectures on Schlicht functions given by L D Landau at Gottingen 1929 Add.Ms.b.195 Notes from by H P Robertson and J von Neumann at Princeton, 3 vols, 1929-30 lectures on dynamics, wave mechanics and quantum theory given Add.Ms.b.196-198 Notes from lectures on dimension and Menger's theorem given by P S: Aleksandrov at Princeton, 1931 Add.Ms.b.199 E H Linfoot NCUACS 9/2/89 ACKNOWLEDGEMENTS We are very grateful to Mrs Linfoot for making the material available, and for her help and encouragement. Peter Harper Timothy E Powell Bath 1989 E H Linfoot NCUACS 9/2/89 8 SECTION A BIOGRAPHICAL A.1 - A.10 A.l Obituary notices in the Times 15 October 1982, Q.J1.R. astr.Soc 1984, and Bull. London Math.Soc.1984. Extract from Discovery January 1952 (pp2-6) with references to Linfoot and his work in optics. Extract from Sunday Times magazine 22 January 1967 (p18) with photograph of Linfoot and brief note on his work at Cambridge. Linfoot's own lists detailing his wartime research projects. Miscellaneous biographical notes by Mrs Linfoot. A.2 Notes from A L Dixon, Magdalen College, Oxford, and E C Titchmarsh re Linfoot's, held 20 July 1928. Letter from Karl Pearson enquiring whether Linfoot would be interested in the post of mathematical assistant in his laboratory, 17 August 1928. Letter from Ronald P Bell in Copenhagen referring to Linfoot 'probably coming here some time this year', 24 August 1928. A.3 Letter and card from Norbert Wiener, November 1930 re visit by Linfoot to Cambridge, Mass., and letter from Linfoot to Professor Bohr at Princeton, 18 December 1930. Letter from Mary L Cartwright, Girton College, Cambridge, 1 June 1932. Principally of mathematical interest but includes congratulations on Linfoot's post at Bristol (Assistant Lecturer in Mathematics). E H Linfoot NCUACS 9/2/89 9 Biographical A.4 Linfoot's ms notes of mathematical discussion with H Heilbronn, 23 April 1934. A.5 A.6 A.7 Linfoot added the following note in 1953: had just come to Bristol from Gottingen (via Copenhagen) and these were the ideas he was thinking about at that time'. ‘Heilbronn Folder also includes undated letter from Heilbronn of mathematical interest. Letter from D M Wrinch re unspecified position at Oxford, 24 January 1936. Letter from W L Ferrar, Hertford College, Oxford, agreeing to write a testimonial for Linfoot, 5 February 1936, and testimonial dated 14 May 1936. Correspondence and papers re Linfoot's application for the Napier Chair of Astronomy, University of St Andrews, March-May, August 1959. Includes correspondence with H H Plaskett and PMS Blackett who, with R O Redman, agreed to act as Linfoot's referees, and list of publications. Letter from Secretary General of the Faculties, University of Cambridge, 30 May 1963, informing Linfoot of his reappointment as John Couch Adams Astronomer from 1 October 1963 for five years. Statement of the conditions of Linfoot's employment as Assistant Director of the [Cambridge] Observatory, 1 Oct 1964. A.8, A.9 Miscellaneous letters from mathematicians. alphabetical order. In A.9 S - W and unidentified E H Linfoot Ncuacs 9/2/89 1o Biographical A.10 3pp ms note 'suggested by Jung's "Essays" and Viola Bonham-Carter's talk "the Souls" ', dated 25 November 1947. 3pp ms note of hypnotism display at the old theatre, Regent Street, Cambridge, 1951. E H Linfoot Ncuacs 9/2/89 11 SECTION B RESEARCH B.1 - B.57 B.l - B.43 Wartime research B.44 - B.57 Postwar research WARTIME RESEARCH Linfoot's lists detailing his Second World War research projects are presented at A.1, and reproduced here as an introduction to the wartime research: List of reports done for Professor Mott's group, 1940-44 Effect of sine-form ground corrugations of small amplitude on l. incoming plane waves. (1940) Estimation by Huyghen's Principle of the effect of ground 2. irregularities on GL Mark II and GL/EF elevation readings. 2a. Corrections to same. (1941) On the Paraboloid Receiver with displaced dipole. 3. Schmidt plate (paraffin wax) delivered to T R E in 1941. (1941) Alternative to the Paraboloid Reflector as an aerial system 4. for ultra-short wavelengths. (1942) 5. A theory of fragmentation (with N F Mott). (1942) Depth of Focus under certain special conditions of T H Projector 6. lens (B P 373950, US 20199859). (1943) Record of research undertaken during World War II (while continuing work as a Lecturer in Mathematics in the University of Bristol) Sept 1939 Optical work on aspheric surfaces was undertaken by Dr Burch and myself at the request of Combined Optical Industries, Ltd., Slough, who were interested in optical plastics. E H Linfoot NCUACS 9/2/89 12 Research July 1940 I became a member of Prof. Mott's Extramural Research Group (M/S) and worked on problems in the development and operational use of radio-location apparatus. 1942-44 1944-45 I had also continued with optical work on a reduced scale, and in March 1942 was asked by MA P to undertake an investigation into certain applications of aspheric optical systems to aerial-reconnaissance photography. The M A P optical work was continued, and a more general research into optical systems of ultra-high performance using aspheric surfaces was undertaken. I also continued as a member of Prof. Mott's team, and assisted in mathematical work on shell-fragmentation. General correspondence and papers re Ministry of Supply projects, 1941-45. 1941. Expenses; work on searchlights etc. 1942. November. 4pp typescript. Includes 'A theory of wave clutter' by Mott, Includes 'Random fracture of a thin metal by [?F J ] Ursell, sent to Linfoot by Mott 1943-45. sheet' 20 January 1943, form ground-corrugations of small amplitude on incoming plane waves' by Linfoot, returned to him 1 January 1945, 4pp ms. 6pp typescript, and 'Effect of sine- E H Linfoot NCUACS 9/2/89 13 Research B.4 - B.9 ‘War work, 1941. RADAR'. Contents of a folder so inscribed by Mrs Joyce Linfoot, divided into six for ease of reference. Mrs Linfoot recalls that this radar section is the work referred to under nos 1, 2 and 3 in her husband's list of the 'I remember going to see Prof. Mott to get work done for Professor Mott, and that she did some of the calculations: "clearance" for this work. a Brunsviga hand machine in a coal-cellar in Bristol during the blitzes. wire netting had to be installed round a radar installation to make the surface effectively level, hence a puzzling shortage of wire netting' 1988) . In practice, we were working out how much (private communication, November The calculations were done on B.4 'The effect of sine-form ground corrugations of small amplitude on incoming plane waves' by Linfoot, 1940. 3pp duplicated typescript. "Theory of the E F dipoles and feeders of GL mark II and GL/EF conversion equipment' by N F M[fott] and JMC S[cott] , November 1940. l5pp duplicated typescript + lp figs. "Theory of the aerial system of the G L mark II and GL/EF conversion equipment’ by preceding. nd but attached to N F Mott , 3pp ms. B.5 "Estimation by Huyghen's Principle of the effect of ground irregularities on G L mark II and GL/EF elevation readings' by Linfoot, 1941 , and 'Corrections' to the same. 26pp ms draft of 'Estimation' + appendices; "Correction'; and ‘Corrections’. lOpp duplicated typescript of 'Estimation' 2pp ms headed B.6 Correspondence and papers, April, July, August 1941. Folder includes: "Screening of RDF Radio Direction Finding fixed echoes' by Mott, 28 July 1941. typescript. sets from 4pp duplicated Notes on 'Effect of ground-corrugations of small amplitude on RDF elevation-readings' by to letter from Mott dated 14 August 1941. Linfoot , nd but attached 5pp ms. 'G L errors of elevation due to the "cliff edge" effect' by F RN Nabarro, 19 August 1941. 3pp duplicated typescript. E H Linfoot NCUACS 9/2/89 /2/ A Research B.7 B.8 Correspondence and papers, September, October 1941. Folder includes: "Notes on the Bedford electrical predictor' by Mott, nd but enclosed in letter from Mott of 2 September [ 71941]. 3pp typescript. Undated notes and reports. Folder includes: 'The calculation of currents in aerials' by Mott. 8pp duplicated typescript. "Synopsis of lecture on EF systems' by Mott. duplicated typescript. 2pp 'The application of wave theory to problems of GL siting' by Nabarro. 5pp duplicated typescript. B.9 Ms calculations by Mrs Linfoot. B.10, B.1l "Mott's group'. Mrs Linfoot, divided into two for ease of reference. Contents of an envelope so inscribed by B.10 B.1l Notes from articles by Y Rocard on 'Visibility of objects lit up by a searchlight', Revue d'Optique 11 (1932). 14pp ms. "Synopsis of Mott's report 25/2/42 on "Visibility of aircraft in searchlight beams".' 3pp ms. "Fragmentation of shell casings and the theory of rupture in metals' by Mott, received August 19th 1941 by the Fragmentation Panel of the Static Detonation Committee of the Ministry of Supply's Advisory Council on Scientific Research and Technical Development. typescript. 12pp duplicated Folder also includes 'Fragmentation of shells and bombs (preliminary note)', nd. 6pp typescript. E H Linfoot NCUACS 9/2/89 15 Research B.12 - B.14 Contents of a "Paraboloids: folder so inscribed divided into three for ease of Shire's problems'. reference. B.12 Correspondence 1941. is E S Shire, The principal correspondent Air Defence Experimental Establishment, Somerford. B.13 Ms calculations. ‘On the paraboloid receiver with displaced dipole' by Linfoot. 2pp duplicated typescript + graph. "Theoretical work on the paraboloid mirror' by F RN Nabarro. 27pp duplicated typescript. - B.17 Miscellaneous reports and papers re Ministry of Supply research projects. "Alternatives to the paraboloid reflector for short- wave aerial systems' typescript. by Linfoot, 1942. 3pp duplicated Figures 3, 4 and 5 for the paper on 'A theory of fragment- ation' by Mott and Linfoot, sent to Linfoot 3 February 1943. "Probability considerations bearing on the arrangement of ammunition dumps' by Linfoot, nd. 4pp ms. ‘Extract from Mott's report on resonator magnetrons' by Linfoot, nd. 2pp ms. B.17 Unidentified ms notes and calculations. E H Linfoot NCUACS 9/2/89 16 Research B.18, B.19 ‘Sutton (Optical). Monocentric Projector’. inscribed, divided into two for ease of reference. Contents of a folder so Schmidt Projector. Bispherical B.18 Correspondence and papers, 1941-43. The principal correspondent is L C Martin, Imperial College London, approached by Linfoot for help in designing a projection lens, November 1941. B.19 Notes, drafts, diagrams, calculations. Folder includes: "Remarks on projector systems' 3pp typescript. by Linfoot, nd. "Note on a Schmidt projector system' 2pp typescript. by Linfoot, nd. B.20 - B.29 Ministry of Aircraft Production programme. 'M A P Correspondence etc.' Contents of a folder so inscribed, divided into ten for ease of reference. The material relates to the project to develop the Schmidt camera for aerial photography which Linfoot undertook at the request of the D S R Optical Committee, Ministry of He worked on the project with the Aircraft Production. Kodak Research Laboratory, Harrow, Middlesex and the Mount Wilson Observatory, California. American contact was Theodore Dunham, Jr., and L C Martin, Imperial College London, was extensively consulted. His principal B.20 Correspondence and papers, 1941. Includes minutes of working committee meeting (DS R Photographic Research Committee), Kodak Ltd Harrow, 7 March, note on 'Schmidt Camera for night photography' by E R Davies of the Kodak Research Laboratory, 4 December, and photographs of membrane grinding and polishing machine. E H Linfoot Ncuacs 9/2/89 17 Research B.21 Correspondence and papers, January - June 1942. Includes 'Report of work in progress on applications of by Linfoot (lp typescript, the Schmidt optical system' with ms note 'sent to Sir Charles March 3/1942'). Darwin by A M T[yndall], B.22 B.23 B.24 B.25 Correspondence and papers, July - December 1942. Correspondence and papers, January - June 1943. Correspondence and papers, July - December 1943. Includes minutes of llth meeting of the Lens Sub-Committee held at the MA P on 22 was chaired by L C Martin. first time at this meeting. Linfoot attended for the December 1943. The Committee 'The Schmidt Camera Project’. Report of work carried out by the Carnegie Institution of Washington and Mount Wilson Observatory, California under contract to the United States National Defense Research Council. Sixth and final Progress The report was sent to Linfoot by the MA P, August 1943. B.26 Correspondence and papers, January - June 1944. Includes 'The field-flattened Schmidt and the Cassegrain- type plate mirror systems' 4 January. by Linfoot , sent to MA P 5pp typescript. B.27 Correspondence and papers, July - December 1944. of 'The use of Schmidt systems the present position of the work, Includes 'first draft' - in Air Photography and suggestions for future policy' E WH Selwyn and G S Speak, November 1944 (4pp typescript with ms additions and corrections), of final version (6pp). and duplicated copy by Linfoot, Martin, E H Linfoot NcUACS 9/2/89 18 Research B.28 "Schmidt Camera for Aerial Use' Developments Department Kodak Ltd, by AE Lee and F H G Pitt, 28 September 1944. B.29 Correspondence and papers, 1945. Includes minutes of 16th meeting of the Lens Sub-Committee held at MAP, 12 January. B.30, B.31 General correspondence re optical research, 1939, 1941-42, B.30 B.31 1939. Includes correspondence with Science Museum London re Schmidt microscope constructed by Linfoot in 1938, and lent to the Museum for display. Includes correspondence with Admiralty 1941-42. Department of Scientific Research & Experiment, Research Laboratory, Teddington, and the Royal Astronomical Admiralty Society. B.32, B.33 Miscellaneous notes, drafts, reports re optical research. B.32 "Report on Schmidt-type optical systems' by Linfoot. 6pp and 2pp typescript drafts. draft is dated February 1941. The shorter incomplete 'The Schmidt Camera' by C G Darwin, 5pp duplicated typescript. 11 October 1941. "Depth of focus under certain special conditions of T H projector lens' duplicated typescript + graph. by Linfoot, 26 March 1943. lp E H Linfoot NCUACS 9/2/89 19 Research B.33 "Leading types of plate-mirror systems' by Linfoot, February 1944. Ms and typescript drafts. 'On some optical systems employing aspherical surfaces' by Linfoot, nd. lOpp duplicated typescript. Miscellaneous shorter typescript drafts. B.34, B.35 Correspondence re supplies and equipment for wartime research, 1942. 2 folders. B.36 - B.43 Miscellaneous wartime reports. B.36 B.37 'A MRE [Air Ministry Research Establishment ] draft Field-strength of R D F Issue 1, 14/7/40'. manual. In original folder. "Report on paraboloidal mirror as a means of obtaining a narrow beam of short wave radiation' 2pp typescript + graph. 9 July 1940. by James Young, ‘Preliminary report on the production of narrow 10 cm beams with particular reference to AIS', TRE, 13 August 1940. 4pp duplicated typescript + figs. "Report on paraboloids', TRE, 3 October 1940. duplicated typescript + figs. O6pp E H Linfoot NCUACS 9/2/89 20 Research B.38 B.39 B.40 'The paraboloid as an aerial system', 1941. 7pp duplicated typescript + figs. TRE, 3 February ‘Assumptions and limitations underlying the use of the larmor-tedone diffraction theory', TRE Swanage, 19 August 1941. Mathematical Pool 5pp duplicated typescript. 'A wave-guide whose cross-section is partially filled with solid dielectric', 17 October 1941. 6pp duplicated typescript + figs. Mathematical Pool TRE Swanage, 'The elements of wave-propagation using the impedance Mathematical Group TRE Swanage, 1 December concept', 1941. 46pp duplicated typescript + figs. 'The reactance of a single wire in a rectangular wave- guide', lp duplicated typescript + fig. Mathematical Group TRE Swanage, 24 November 1941. 'Babinet's principle and the theory of resonant slots', Mathematical Group TRE Swanage, 29 December 1941. 8pp duplicated typescript + figs. "Corrections and comments on reports 1 - 30 issued by Mathematical Group TRE Swanage', 2pp duplicated typescript. 26 January 1942. "Reactance of a wire in a rectangular wave-guide', Mathematical Group TRE Swanage, 10 February 1942. lp duplicated typescript + figs. List of 'Reports issued prior to 16 June 1942 by Mathematical Group TRE Malvern'. typescript. 2pp duplicated E H Linfoot NCUACS 9/2/89 21 Research B.41 B.42 ‘parallel reactance of inductive iris in rectangular wave-guide', 30 October 1942. 6pp duplicated typescript + figs. Mathematics Group TRE Malvern, "Surface impedance of an infinite parallel wire grid Mathematics Group at oblique angles of incidence', 5pp duplicated TRE Malvern, 26 November 1942. typescript + figs. 'The application of quasi-stationary methods to lumped shunt admittances in wave-guides'. typescript + figs. and February 1943. The figures are dated in January 20pp duplicated 'The mismatch at a geometrical discontinuity ina parallel strip transmission line and an H wave-guide'. The figures are dated in January and February 1943. 5pp duplicated typescript + figs. rectangular "Theory of an ideal gapless RDF aerial', Group TRE Malvern. The figures are dated in April 1943. 4pp duplicated typescript + figs. Mathematics B.43 "Effect of wind on sound detection of aircraft', 3pp typescript. nd. 'A theoretical estimate of the scattering power of aircraft for electric-magnetic radiation of wave lengths short compared with its dimensions', typescript + lp ms notes. 2pp duplicated nd. "Note on the accuracy of course and speed determination by graphic plots, with special reference to fire control methods', with ms additions and corrections. headed with the ms inscription 'Huxley'. A A Command Research Group, nd. The first page is lOpp typescript continued... E H Linfoot NCUACS 9/2/89 22 Research B.43 cont'd TRE memorandum 'Time and frequency uncertainty in waveform analysis' 1951 but found with wartime papers. typescript + figs. by P M Woodward, dated April 6pp duplicated POSTWAR RESEARCH B.44 - B.46 A sequence of ms optics notes not in Linfoot's hand. Some of the notes are dated March, May and June 1951. 3 folders. B.47, B.48 Ms drafts, narratives, calculations "Meniscus Schmidt'. etc, Feb 1960' including ‘Outline of MS investigation Sept 1959 - and some work by Mrs Joyce Linfoot. 2 folders. B.49 - B.54 Ms notes, drafts, calculations etc., xre'Meniscus Schmidt', "Meniscus Schmidt Cassegrain' etc., nd. 5 folders. B.55, B.56 "Mrs Berrer (Spot diagrams) .' Contents of a folder so inscribed divided into two for ease of reference. computing work for Linfoot. Mrs Berrer did B.57 Letters from Mrs Berrer about her work for Linfoot, 1949-54. E H Linfoot Ncuacs 9/2/89 23 SECTION C CONSULTANCIES C.1 - C.60 c.1 COX, HARGREAVES & THOMSON LIMITED C.2, C.3 ELECTRIC & MUSICAL INDUSTRIES LIMITED (EMI) C.4 - C.6 FARRAND OPTICAL CO.,INC C.7 - C.21 GRUBB PARSONS (SIR HOWARD GRUBB, PARSONS & COMPANY) C.22 - C.24 MINISTRY OF SUPPLY C.25 MUIRHEAD & CO., LIMITED C.26 - C.29 PERKIN-ELMER CORPORATION C.30 - C.34 TAYLOR, TAYLOR & HOBSON LIMITED C.35, C.36 TECHNE (CAMBRIDGE) LIMITED C.37 - C.60 UNIVERSITY OF ST ANDREWS E H Linfoot Ncuacs 9/2/89 24 Consultancies COX, HARGREAVES & THOMSON LIMITED 1949-52, 1955 Cox, Hargreaves & Thomson were manufacturers of astronomical and scientific instruments of London EC4 and Kingswood, Surrey. c.l Correspondence, re 'Vatican Schmidt' and 'Uccle telescope’. ms notes, calculations and diagrams ELECTRIC & MUSICAL INDUSTRIES LIMITED (EMI) 1945-48 Linfoot acted as 'consultant in Optics' to EMI's research laboratories 1 June 1945 - 30 May 1948. C.2 c.3 Correspondence re Schmidt projectors etc with EMI research personnel including the Director of Research, I. Shoenberg. Ms notes, calculations, diagrams; blueprints. FARRAND OPTICAL CO., INC. 1951-54, 1961 Farrand Optical Co., Inc. of New York were designers and manufacturers of precision optics, electronic and scientific instruments. In December 1951 Farrand asked Linfoot to consider the post of optical designer with the company. He preferred to remain in Cambridge and enter into a consultancy agreement with them. The agreement expired in March 1955. c.4 Correspondence and papers including copy of consultancy agreement, 1951-52. E H Linfoot NCUACS 9/2/89 25 Consultancies Ca5 Correspondence, ms notes, calculations and diagrams, 1953. C.6 Correspondence, ms notes etc., 1954, 1961 and nd. GRUBB PARSONS (SIR HOWARD GRUBB, PARSONS AND COMPANY) 1946 - 1959 In 1946 Linfoot entered an agreement with Grubb Parsons to act as a consultant in astronomical designs. He was to assist 'by technical advice on computation and the arrangement of optical systems for astro- nomical instruments' and 'by practical advice and quality assessment in the testing and manufacture of astronomical systems'. In 1950 he reached a separate consultancy agreement with Grubb Parsons in respect of their undertaking the manufacture of the optical parts for the Isaac Newton reflecting telescope. Linfoot had been associated with the Isaac Newton telescope project from 1947. The Astronomer Royal, Sir Harold Spencer Jones, invited him to attend the 12 December 1947 meeting of the Board of Management of the Isaac Newton Observatory which considered the optical design of the telescope, and he attended further Board meetings in 1948 and 1949. He was also a member of the optical design and spectroscopic subcommittees. For convenience all Linfoot's Isaac Newton telescope material has been presented under Grubb Parsons. E H Linfoot NCUACS 9/2/89 26 Consultancies Cel. = 2C 12 Correspondence and papers re Linfoot's consultancy work for Grubb Parsons including Isaac Newton telescope. His principal correspondents were G M Sisson and G E Manville. C.7 C.8 1946-47 1948-49 Cc.10 1952-53 C.1l 1954-55 c.9 1950-51 C.12 1956-58 €.13. = C.21 Correspondence between Linfoot and the Astronomer Royal and others xre Isaac Newton Telescope; Isaac Newton Observatory Board of Management papers and other committee papers. C.13 O14 1947 1948 C.15 1949 c.16 1950 C.17 c.18 1951 1954 c.19 / 1955 c.20 1959 c.21 nd MINISTRY OF SUPPLY 1952, 1954-56 In 1954 Linfoot was offered a consultancy agreement by the Ministry to advise on the 'study of mirror lens systems and the application of information theory to lens design'. The agreement expired on 31 January 1956. For Linfoot's wartime work for the Ministry of Supply, see Section B. C.22 Correspondence and papers, 1952, 1954 Includes agenda of meeting of Aeronautical Research Council's Air Reconnaissance Committee, 21 July 1954, and Royal Aircraft Establishment, Farnborough, Technical Memorandum on 'The effect of film resolution upon the size of cameras in air photography', by R W Fish, December 1954. E H Linfoot NCUACS 9/2/89 27 Consultancies C.23 C.24 Correspondence and papers, 1955-56. Letter from Linfoot (first page missing), 'notes on R.A.E problems (M.o.S)', bibliographic references on aerial photography, etc, nd. MUIRHEAD & COMPANY LIMITED 1945-46 Muirhead were telegraph and electrical engineers of Beckenham, Linfoot undertook to 'test and report on the optical system Kent. of a telephoto apparatus' for the company. c.25 Correspondence and papers, 1945, 1946. Includes Linfoot's report, technical drawing of telephoto system, photographs. PERKIN-ELMER CORPORATION 1955, 1958-62, 1964 In 1959 Linfoot entered into an agreement with Perkin-Elmer of Norwalk, Connecticut to act as a consultant on optical design and It was extended on a number of occasions until optical systems. 31 January 1965. C.26 Correspondence, 1955, 1958. Linfoot's letter of 16 November 1958 outlines the fields of optics in which he might be of most use to Perkin-Elmer. E H Linfoot NCUACS 9/2/89 28 Consultancies C.27 Correspondence and papers, 1959. Includes Perkin-Elmer's letter confirming terms of consultancy agreement and papers re 'Diffraction- limited Optics Study' with which Linfoot assisted. C.28 Correspondence and papers, 1960. Includes correspondence re extension and amendment of consultancy agreement. C.29 Correspondence and papers, 1961-62, 1964. Includes correspondence re extension of consultancy agreement. TAYLOR, TAYLOR & HOBSON LIMITED 1943-1945 Taylor, Taylor & Hobson were manufacturing opticians and engineers of Leicester. Linfoot was engaged 'as a consultant on the technique of making and testing non-spherical objective systems' in October 1943. Much of the material relates to a patent application. C.30 1943 October - December c.31 C.32 c.33 c.34 1944 January - June 1944 July - December 1945 Ms and typescript notes and drafts E H Linfoot NCUACS 9/2/89 29 Consultancies TECHNE (CAMBRIDGE) LIMITED 1941-42, 1950-51 Techne were a scientific instruments firm of Duxford, Cambridge which engaged Linfoot as consultant on optics from 1 July 1950. C.35 C.36 Ms notes and drafts, 1941-42, found with later Techne material. Correspondence and papers re terms of agreement, bispherical monocentric projector etc, 1950-51. E H Linfoot NCUACS 9/2/89 2 30 Consultancies UNIVERSITY OF ST ANDREWS 1944-1959 At the end of the Second World War St Andrews decided to equip its new Observatory (built 1939-40) with a 30-36-inch Schmidt-Cassegrain telescope and Linfoot accepted an invitation to take charge of the theoretical-optical side of the project as temporary external collaborator. The material is principally Linfoot's correspondence with the Observatory's first Director, E Finlay-Freundlich, and the Instrument-maker to the Observatory, R L Waland. There are also Linfoot's ms notes and drafts, press-cuttings and photographs. C.37 C.38 C.39 c.40 1944 item is 'Preliminary specification 1944, 1945. of special Baker type camera for Professor Freundlich’. Linfoot agreed to cooperate as optical expert during the construction of the new telescope in his letter of 15 December 1945. 1946 January - June. 1946 July - December. 1947 January - June. article for Scotsman. Includes correspondence re C.41 1947 July - December. C.42 C.43 1948 January - June. 1948 July - December. BBC radio talk on the 'St Andrews Schmidt-Cassegrain Project’. Includes draft of Linfoot's E H Linfoot NcuACS 9/2/89 31 Consultancies C.44 c.45 Includes 'Memorandum of points relating to 1949. the St Andrews Schmidt-Cassegrain project discussed and agreed October 27-30 1949' signed by Linfoot, Finlay-Freundlich and Waland. Includes drafts of a BBC radio talk by 1950. Linfoot on 'The St Andrews Telescope Project'. C.46 1951. C.47 C.48 Cc.49 1952 January-July. visit (July 1952)'. Includes 4pp ms 'St Andrews 1952 August-November. Miscellaneous ms notes, drawings, photographs etc, found with 1952 and 1953 material. c.50 1953. c.51 c.52 1954-55. 1956-57. €.53 1959. C.54 Contents of a folder inscribed 'St Andrews Schmidt- Cassegrain system results’. - , c.55 Miscellaneous notes, drafts, calculations etc. E H Linfoot NCUACS 9/2/89 32 Consultancies C.56 C.57 Press-cuttings. 7 Photographs: "St Andrews workshops and pilot model’. contents of an envelope inscribed C.58, C.59 St Andrews pilot model photographs of star images. 2 folders. C.60 Miscellaneous photographs. E H Linfoot NcuACS 9/2/89 33 SECTION D PUBLICATIONS, LECTURES, CONFERENCES D.1 - D.40 D.1 - D.15 ‘Almost Periodic Functions'. Linfoot completed the manuscript of his book on almost periodic functions during his stay at Princeton, 1929-31. However his efforts to secure publication were frustrated by the publication of A S Besicovitch's Adams Prize essay on the same topic. D.1 - D.8 Contents list, typescript draft of book, bibliographical references. 8 folders. D.9 - D.15 Correspondence with colleagues and publisher, arranged alphabetically. D.9 D.10 D.11 D.12 D.13 D.14 D.15 Besicovitch, AS 1931 June - October Blaschke, W 1931 June - September Bohr, HA 1931 September - November Clarendon Press Oxford 1931 July Courant, R 1931 November - 1933 June Luneburg, R 1932 January - 1933 June Veblen, O 1931 September, October D.16 "How to sum an infinite series', lecture to Bristol Mathematical Association, 1932. 14pp ms draft. E H Linfoot NcuUACS 9/2/89 34 Publications, lectures, conferences D.17 D.18 'Squaring the circle', lecture to students' Mathematical Society, Bristol, 1933. 7pp ms draft. Mathematical colloquium on number theory, Bristol, 12 - 15 June. (with H Heilbronn) and presented a paper on ‘Schneider's proof of Gelfond's theorem'. Linfoot organised the colloquium Programme, correspondence re arrangements. D.19 Lecture on mathematical probability, [ ?Bristol ] Mathematical Association, 1937. 8pp ms draft. D.20 'An application of the Schmidt principle to Microscopy’. Brief correspondence, ms and typescript drafts, proofs for article published in Journal of Scientific Instruments, 1938. D.21 D.22 Letter re arrangements for lecture on the "Schmidt Microscope', Bristol, 17 March 1939. Brief correspondence re proposed article on 'Recent advances in telescope design' Occasional Notes, 1940, 1941. for Royal Astronomical Society's continued... E H Linfoot Ncuacs 9/2/89 35 Publications, lectures, conferences D.22 cont'd... "Coma and the abbe sine-condition'. Brief correspondence, 5pp typescript ‘corrected copy' of article published in British Astronomical Association Journal, 1941. ‘Some properties of integers', Mathematical Society November 1942, Oxford Invariant Society May 1945, Bristol Students' Mathematical Society March 1948 and Cambridge Adams Society October 1949. lecture to King's College l2pp typescript draft. D.24 "Some aspects of relativity', lecture to [?Bristol ] Students! Mathematical Society, January 1945. lOpp typescript draft. "Science and the Case for Idealism’. Published version only of article for Listener, 23 March 1950. D.26 London Conference on Optical Instruments, 19 - 26 July 1950. telescope’. Linfoot presented a paper on 'The modern reflecting Programme, brief correspondence with Nature re article on conference, letter of thanks from organiser, llpp typescript draft of Linfoot's paper. E H Linfoot NCUACS 9/2/89 36 Publications, lectures, conferences D.27 ‘On the testing of fast Schmidt cameras’. Notes, drafts, calculations, brief correspondence re paper by Linfoot. Some of the material is dated in 1950 and 1951. D.28 "Science and aesthetic values', Cambridge, February 1951. lecture to Socratics, llpp ms draft. D.29 D.30 D.31 Physical Society Optical Group meeting, Cambridge, 26 - 27 June 1953. "The theory of R.M.S. aberration balancing’. Linfoot presented a paper on Programme, list of participants, correspondence re arrangements. Florence meeting on 'Problems in Contemporary Optics', 10 - 16 September 1954. Linfoot presented a paper on ‘Informational criteria of image quality and optical design'. Programme, summary of Linfoot's paper etc. Symposium on Astronomical Optics and Related Subjects, Manchester, 19 - 22 April 1955. on 'Noise, aberrations and the information content of optical images' ment of optical image quality'. 'Transmission factors and the assess- Linfoot presented papers and Programme, notice of published proceedings. E H Linfoot NcuaACS 9/2/89 37 D.32 D.33 D.34 D.35 Publications, lectures, conferences Symposium on 'Problems in the formation and evaluation of optical images', Linfoot presented a paper on ‘Transmission factors and optical design’. Rochester, NY, 15 - 18 June 1955. Programme, photograph, brief correspondence reother invitations in connection with Rochester Symposium. 58th meeting of the German Society for Applied Optics, Linfoot presented a paper Mainz, 11 - 14 June 1957. ‘Uber den Informationsinhalt photographischer Bilder’. Programme only. Meeting of the Research Section of the German Photographic Society and the German Society for Applied Optics on 'Qualitat der photographischen Bildwiedergabe', Cologne, Linfoot presented a paper on 20 - 21 March 1958. "Allgemeine Qualitatsbeschrankung photographischer Bilder'. Programme, list of participants, letter from organiser, English version of Linfoot's paper (llpp typescript). Fifth Conference of the International Commission for Optics on 'Modern systems for detecting and evaluating optical radiation', Stockholm, 24 - 30 August 1959. presented a paper on ‘Informational considerations in the design of astronomical spectrographs'. Linfoot Programme only. E H Linfoot NCUACS 9/2/89 38 Publications, lectures, conferences D.36 "Contrast transmission and the image evaluation problem'. 23pp typescript draft paper + references, figure captions, French and German summaries, ‘received 3 November 1959'. D.37 "Information theory and its application to the quality- evaluation of optical systems'. 37pp typescript report for Royal Society Optical Sub- committee + references and figures, 1959. D.38 6lst meeting of the German Society for Applied Optics, Karlsruhe, 7-11 June 1960. Linfoot presented a paper on 'Wellentheoretische und strahlentheoretische Bild- gutebeurteilung'. Programme, 6pp typescript draft of Linfoot's paper. D.39 'Light'. Published version of article for an encyclopaedia and 2pp ms notes, nd. D.40 ‘Appendix on refraction corrections’. 3pp typescript, nd. ‘An exercise in the redundancy of the English language’. 2pp typescript, nd. E H Linfoot NcUACS 9/2/89 39 INDEX OF INDIVIDUALS, ORGANISATIONS AND FIRMS AERO RESEARCH LIMITED ATKINSON, R da'E BAKER, James G BARHAM, P M BELL, Ronald Percy BESICOVITCH, Abram Samoilovitch BLACKETT, Patrick Maynard Stuart, Baron BLASCHKE, W BOHR, Harald A BOULTER, W S BRITISH BROADCASTING CORPORATION BRITISH INSULATED CABLES LTD BROCK, GC BURCH, Cecil Reginald BURNS, David M BUXTON, A CARIO, CARTWRIGHT, Dame Mary Lucy CHANCE BROTHERS LIMITED CHOWLA, S D C.36 C.13, C.17-C.19 B.23, B.24 C.22, C.23 See also B.29 A.2 D211 See also A.3 C.36 c.45 B.30, B.31 See also C.11,C.21,D.22 C.41 B.23, B.30 D.34 A.3, A.8 B.18, B.22, C.31 See also C.8 A.8 E H Linfoot NCUACS 9/2/89 40 Index of individuals, organisations and firms CHURCH, Alonzo CISAR, Jaroslav CLARENDON PRESS OXFORD CONDLIFFE, G E COPSON, E T COUDER, COURANT, Richard COX, Arthur COX, HARGREAVES & THOMSON LIMITED COX, Harold W COX, Lawrence A DARWIN, Sir Charles (Galton) DAVIES, ER de BRUYNE, Norman Adrian DIXON, Arthur Lee . DUNHAM, Theodore, Jr A.8 C.47, C.48, C.50, C.51 D.12 | C.2, C.25 B.12 A.8 D.13 B.24, C.4, C.30-C. 33 c.1 B.22 B.21, B.22, B.31 B.21 See also B.32 B.20 See also B.21 C.36 A.2 B.20 - B.22 ELECTRIC & MUSICAL INDUSTRIES LIMITED (EMI) C.2, C.3 ELLIOTT, A ERDOS, Paul ESTERMANN, T B.31 A.8, D.18 D.18 E H Linfoot Ncuacs 9/2/89 Al Index of individuals, organisations and firms FAHY, Thomas P FARRAND, C L FARRAND OPTICAL CO., INC. FERRAR, W L C.27, C.28 C.4 - C.6 c.4 - C.6 A.5 FINLAY-FREUNDLICH, Erwin C.37-C.48, C.50-C.52 FISH, RW FRANCON, M GARDNER, Irvine C C.22, C.23 See C.36 D.32 GRUBB PARSONS (SIR HOWARD GRUBB, PARSONS & COMPANY) C.2,C.7-C.21,C.37 HABELL, K J HALL, W HARGREAVES, F J HEILBRONN, Hans Arnold HOLMAN, H E HOPKINS, Harold Horace HOUGHTON, J L HOVDE, Frederick L HYDE, W Lewis B.21 B.31, C.1 A.4, D.18 C.2 D.29 B.20, B.24 See also B.21 B.21 D.32 E H Linfoot NCUACS 9/2/89 42 Index of individuals, organisations and firms INGHAM, Albert Edward A.8 ISAAC NEWION TELESCOPE See GRUBB PARSONS JOHNSON, MATTHEY & CO. LTD. B.34 JONES, Sir Harold Spencer KODAK LIMITED LANG, HR LEE, AE LEWIS, Frank D LINFOOT, Joyce LOVELL, Sir (Arthur Charles) Bernard LUBANSKA, Hope LUNEBURG, Rudolf McCARTHY, E L MACFARLANE, D MACFARLANE, Sir George (Gray) MANVILLE, G E MARTIN, Sir David (Christie) B.24, C.13-C.18 See also C.9, C.10 B.20-B.24, B.27 See also C.48 D.20 See B.28 B.22 See A.1, B.9, B.47, B.48 C.27 - C.29 C.2, C.7-C.12 B.1l, B.6 E H Linfoot NCUACS 9/2/89 43 Index of individuals, organisations and firms MARTIN, Louis Claude MIDDLEHURST, Barbara MILLER, Carlton W MINISTRY OF AIRCRAFT PRODUCTION MINISTRY OF SUPPLY MOTT, Sir Nevill (Francis) B.18,B.23,B.24,B.26, B.27,B.29,B.30,D.26,D.29 C.47,C.48 C.28, C.29 B.20-B.27, B.29, B.34 B.1-B.3, B.6,B.14,B.15 B.21, B.34, C.22-C.24 B.1-B.3, B.6,B.7,B.12 See also B.4,B.8,B.10 B.11,B.16 MOWAT, D M Stormont MUIRHEAD & COMPANY LIMITED B.23 C225 NABARRO, Frank Reginald Nunes NAISH, J M NATURE NEWMAN, W H NEWTON, George C PAGE, Arthur PAGEL, Bernard PEARSON, Karl PERKIN-ELMER CORPORATION B.7,B.12,B.14, See also B.6,B.8 C.22, C.23 D.26 D.22 See C.2 D.18 C.12 A.2 C.26-C.29 E H Linfoot NCUACS 9/2/89 44 Index of individuals, organisations and firms PERKIN, Richard S PHILLIPS, Eric G PILKINGTON BROTHERS LIMITED PILKINGTON, Laurence H A PITT, F HG PLASKETT, Harry Hemley POLSTER, Harry D PRENTICE, J P M PULLINGER, A F PULLINGER & MALET PULLIN OPTICAL COMPANY LIMITED PYE, Sir David (Randall) RADO, Richard RAY, J C C.41, C.43 See also C.8 C.41 B.21-B.24 See also B.28 A.6, C.15 See also C.17 C.26 B.31 C.31 - C.33 C.31 - C.33 c.25 See B.20 REDMAN, Roderick Oliver See C.16, C.21 RITCHIE, Anthony E A.6 ROYAL ASTRONOMICAL SOCIETY B.31, C.43, D.22 E H Linfoot NcuACS 9/2/89 45 Index of individuals, organisations and firms SADLER, Donald H SCHULTE, Daniel H SCOTT, John MC SCOTT, Roderic M SELLERS, F J SELWYN, E W H SHAW, H SHIRE, E S SHOENBERG, Sir Isaac SISAM, Kenneth SISSON, George M SKENE, MacGregor SORENSON, Robert H SPENCER, DA STANLEY, Gertrude K SUGERMAN, B D.22 C.27 B.1-B.3, B.12, B.18 See also B.4 C.27 D.22 B.20-B. 23 B.30 B.12 C.2 D.12 C.7-C.12 See also C.16,C.23 D.21 C.29 B.23,B.26,B.27,B.29 See also B.24 A.9 B.24,B.26,B.27 TAYLOR, TAYLOR & HOBSON LIMITED B.18,B.24,C.30-C.34 TEARLE, J L TECHNE (CAMBRIDGE) LIMITED THOMPSON, Major E H TITCHMARSH, Edward Charles B.27 C.35, C.36 B.26 A.2 E H Linfoot Ncuacs 9/2/89 46 Index of individuals, organisations and firms TODD, H TORALDO, G TYNDALL, Arthur Mannering UNIVERSITY OF ST ANDREWS URSELL, [? Fritz Joseph ] VEBLEN, Oswald VICK, Sir Francis Arthur WALAND, Robert L WARMISHAM, A WATSON, George Neville WIENER, Norbert WOODWARD, P M WRIGHT, Edward Maitland WRINCH, Dorothy M WYNNE, Charles G YEMM, E W YOUNG, James B.23,B.34 D.29 B.18,B.20,B.21 See also B.34 C.37-C.60 See B.3 D.15 C.37-C.41,C.43,C.46, C.50-C.52 B.18,B.24,C. 30-C. 33 A.9 A.3 See B.43 B.2, D.18 A.5 C.14,C.36 B.7 See B.37