Record

Authorised form of nameMcLennan; Sir; John Cunningham (1867 - 1935); physicist
Dates1867 - 1935
NationalityCanadian
Place of birthIngersoll, Ontario, Canada
Date of birth14 April 1867
Place of deathNear Abbeville, France, on a train from Paris to London returningfrom a meeting of the International Bureau of Weights and Measures.
Date of death09/10/1935
Dates and placesBurial: Beside his wife at Stow of Wedale, Scotland.
Occupationphysicist
Research fieldSpectroscopy
Radioactivity
Physics
ActivityEducation:
Collegiate Institute, Clinton, Ontario, Canada; Stratford model school (1884); University of Toronto BA; Cambridge PhD
Career:
Director of the physics laboratory at the University of Toronto (1906-1932); constructed a helium liquefier at the University of Toronto, in collaboration with his graduate student Gordon Merritt Shrum (1923).
Memberships:
Royal Canadian Institute (President 1915–16)
Honours:
OBE 1917; KBE 1935
Awards/Medals:
Flavelle medal 1926
Membership categoryFellow
Date of election06/05/1915
Age at election48
ProposerJohn Alexander McClelland
William Henry Bragg
Charles Glover Barkla
John Sealy Edward Townsend
Robert John Strutt
Charles Thomson Rees Wilson
Royal Society activityRoyal Society roles:
VP 1933-1934
Medals and prizes:
Royal Medal 1927
Lectures:
Bakerian 1928
RelationshipsParents: David McLennan (d. 1897), from Aberdeenshire, miller and grain dealer, and Barbara (d. 1915), daughter of John Cunningham of Stewarton, Ayrshire.
Spouse: Elsie Monro Ramsay (d. 1933), daughter and heir of William Ramsay, whisky merchant, of Bowland, Midlothian (1910).
Published worksRCN R72526
RCN R72506
RCN R72532
RCN R72534
RCN 15270
RCN R72503
RCN R72533
RCN R72505
RCN R72535
General contextWorked on low temperature superconductivity of metals.
Proposed the use of helium in airships.
Royal Society Obituary or MemoirClick to view (may be contained within a meeting notice, presidential address or list of death notices)
SourcesSources:
Bulloch's Roll; DNB; DSB vol 18 pp 586-587
Obituaries:
Obituary Notices of Fellows of the Royal Society 1932-1935 vol l pp 577-583, plate, by A S Eve
References:
R W Home, 'The Royal Society and the Empire: the colonial and Commonwealth Fellowship. Part 2. After 1847' in NR 2003 vol 57 pp 47-84
Virtual International Authority Filehttp://viaf.org/viaf/57394419
Royal Society codeNA1169
Archives associated with this Fellow
Reference numberTitleDate
IM/002895McLennan, Sir John Cunninghamnd
EC/1915/09McLennan, Sir John Cunningham: certificate of election to the Royal Society
IM/002894McLennan, Sir John CunninghamSeptember 1920
MC/31/109Letter from [John Cunningham] McLennan, Bowland Stow, Midlothian, Scotland, to Mr [Robert] Harrison, [Assistant Secretary], [Royal Society]22 July 1916
NLB/63/284Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Professor [John Cunnigham] McLennan, FRS03 August 1922
NLB/20/354Copy letter from Robert William Frederick Harrison, to John Cunningham McLennan, [Fellow of the Royal Society], The University, Toronto29 March 1900
MC/30/123Letter from [John Cunningham] McLennan, 88 Prince Arthur [Avenue], Toronto, to The Secretaries, The Royal Society, London31 May 1915
RR/19/84Referee's report by William Mitchinson Hicks, on a paper 'On the series lines in the arc spectrum of Mercury' by John Cunningham McLennannd [1912]
RR/55/86Referee's report by John Cunningham McLennan, on a paper 'Ultra-violet absorption of ice' by E J CasselAugust 1935
NLB/54/593Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS26 June 1917
NLB/53/339Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS, The Berners Hotel, Berners Street, W.17 July 1916
NLB/54/606Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Messrs Harrison & Sons2 July 1917
RR/27/112Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'On the fluorescence of aesculin' by John Cunningham McLennan and F M CaleAugust 1922
RR/22/81Referee's report by Joseph John Thomson, on a paper 'Ionisation potentials of mercury, cadmium, and zinc, and the single- and many-lined spectra of these elements' by John Cunningham McLennan and J P HendersonJune 1915
RR/26/95Referee's report by Alfred Fowler, on a paper 'On the emission and absorption spectra of mercury' by John Cunningham McLennan and W W Shaver11 July 1921
RR/27/114Referee's report by William Henry Bragg, on a paper 'On the excitation of characteristic X-rays from light elements' by John Cunningham McLennan and M L ClarkSeptember 1922
RR/32/40Referee's report by John Cunningham McLennan, on a paper 'The vacuum spark spectra of some the heavier elements, and series classification in the spectra of ionised atoms homologous with copper, silver, and gold' by J A CarrollJune 1925
RR/25/26Referee's report by Alfred Fowler, on a paper 'Vacuum arc spectra of various elements in the extreme ultra-violet' by John Cunningham McLennan, D S Ainslie and D S Fullernd [1918]
RR/26/93Referee's report by Alfred Fowler, on a paper 'The spectrum of ionised potassium' by John Cunningham McLennan11 July 1921
RR/26/94Referee's report by Alfred Fowler, on a paper 'On the refractive indices of mercury and thallium vapours' by John Cunningham McLennan11 July 1921
RR/37/106Referee's report by Alfred Fowler, on a paper 'On the luminescence of solid nitrogen under cathode ray bombardment' by John Cunningham McLennan, H J C Ireton and E W SamsonJuly 1928
RR/40/59Referee's report by John Cunningham McLennan, on a paper 'The behaviour of water with change of temperature and with addition of electrolytes as studied by the Raman effect' by I. Ramakrishna Rao August 1930
RR/27/113Referee's report by Charles Glover Barkla, on a paper 'On the excitation of characteristic X-rays from light elements' by John Cunningham McLennan and M L ClarkJuly 1922
RR/37/108Referee's report by Alfred Fowler, on a paper 'The zeeman effect for the spectrum of tantalum' by John Cunningham McLennan and I A W DurnfordJuly 1928
NLB/64/468Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS19 April 1923
RR/29/75Referee's report by John Cunningham McLennan, on a paper 'The thermionic and photo-electric properties of the electro-positive metals' by A F A YoungJuly 1923
RR/27/111Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'On the absorption of wavelength = 5460.97 A. by luminous mercury vapour' by John Cunningham McLennan, D S Ainslie and F M CaleJuly 1922
RR/52/103Referee's report by John Cunningham McLennan, on a paper 'The stark effect in the molecular spectrum of hydrogen' by Hawley SnellMay 1934
RR/30/8Referee's report by John Cunningham McLennan, on a paper 'Note on Vegard's theory of the aurora' by Robert d'Escourt Atkinson24 July 1924
NLB/56/160Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS4 December 1918
NLB/68/306Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to the Lord Rayleigh [Robert John Strutt], FRS16 June 1925
NLB/60/642Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS8 March 1921
NLB/58/816Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS22 June 1920
NLB/66/664Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Robert John Strutt] Lord Rayleigh, FRS16 June 1924
RR/50/99Referee's report by John Cunningham McLennan, on a paper 'The first spark spectrum of gold. Au II' by Raghavendra B. V. RaoMay 1933
NLB/59/230Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS29 July 1920
RR/37/107Referee's report by Frederick George Donnan, on a paper 'On the decomposition of ammonia by high-speed electrons' by John Cunningham McLennan and Gilbert GreenwoodJuly 1928
RR/37/109Referee's report by Samuel Walter Johnson Smith, on a paper 'The magnetic susceptibility of single crystals of zinc and cadmium' by John Cunningham McLennan, Richard Ruedy and Elizabeth CohenSeptember 1928
NLB/59/237Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS30 July 1920
RR/42/97Referee's report by Alfred Fowler, on a paper 'On the spectroscopy of auroral green line radiation' by John Cunningham McLennan and H J C Ireton7 July 1930
RR/42/17Referee's report by John Cunningham McLennan, on a paper 'Intensity distribution in the band spectrum of helium (He2) for the region ? 6100 - 6500' by C W W ReadSeptember 1931
RR/39/84Referee's report by Alfred Fowler, on a paper 'The spark spectrum of thallium, Tl III' by John Cunningham McLennan, A B McLay and M F Crawford10 June 1929
RR/47/133Referee's report by John Cunningham McLennan, on a paper 'The nuclear spin of arsenic' by Samuel TolanskyMay 1932
RR/43/107Referee's report by Alfred Fowler, on a paper 'Arc spectrum of gold' by John Cunningham McLennan and A B McLaySeptember 1931
RR/48/48Referee's report by John Cunningham McLennan, on a paper 'The thermal expansion of quartz by x-ray measurements' by A H Jay[May 1933]
RR/14/194Referee's report by George Francis Fitzgerald, on a paper 'Electrical conductivity in gases traversed by cathode rays' by John Cunningham McLennan7 February 1900
RR/40/64Referee's report by John Cunningham McLennan, on a paper 'Absolute intensity of the aurora line in the night sky, and the number of atomic transitions required to maintain it' by Robert John Strutt, Lord Rayleigh1930
RR/43/106Referee's report by Owen Willans Richardson, on a paper 'The hyperfine structure of Tl II' by John Cunningham McLennan and M F CrawfordApril 1931
RR/34/62Referee's report by Owen Willans Richardson, on a paper 'The band spectra of helium and hydrogen at low temperatures' by John Cunningham McLennan, H Grayson Smith and C A Lea[October 1926]
RR/42/95Referee's report by Owen Willans Richardson, on a paper 'The hyperfine structure of some lines in the arc and first spectrum of indium' by John Cunningham McLennanAugust 1930
RR/50/98Second referee's report by John Cunningham McLennan, on a paper 'The first spark spectrum of gold. Au II' by Raghavendra B. V. RaoJanuary 1934
RR/14/195Referee's report by Oliver Joseph Lodge, on a paper 'Electrical conductivity in gases traversed by cathode rays' by John Cunningham McLennannd [March 1900]
RR/43/61Referee's report by John Cunningham McLennan, on a paper 'Notes on the spectrum of gold' by William Mitchinson HicksMarch 1932
RR/43/108Referee's report by Alfred Fowler, on a paper 'Spark spectrum of mercury, Hg II' by John Cunningham McLennan, A B McLay and M F CrawfordSeptember 1931
NLB/60/296Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS13 January 1921
NLB/60/387Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS27 January 1921
RR/45/112Referee's report by John Cunningham McLennan, on a paper 'The hyperfine structure of the lines of the arc spectrum of rubidium' by Derek Ainslie Jackson[December 1932]
RR/48/42Referee's report by John Cunningham McLennan, on a paper 'On metallic dispersion in the near infra-red' by C Hurst[November 1933]
RR/51/42Referee's report by John Cunningham McLennan, on a paper 'Raman effect and temperature I—Ammonium chloride, bromide, iodide' by A C Menzies and H R Mills[October 1934]
RR/47/87Referee's report by John Cunningham McLennan, on a paper 'The stark effect for xenon' by H W Harkness and J F HeardSeptember 1932
RR/51/25Referee's report by John Cunningham McLennan, on a paper 'The exchange of energy between a platinum surface and gas molecules' by W B Mann[June 1934]
RR/47/48Referee's report by John Cunningham McLennan, on a paper 'The effect of a transverse magnetic field on the refractive index of imperfectly mixed gases' by Clinton Coleridge Farr and C J BanwellApril 1932
RR/46/110Referee's report by John Cunningham McLennan, on a paper 'A new apparatus for rapid spectrophotometry of liquids in the ultra-violet region' by Frank Twyman[July 1932]
RR/49/86Referee's report by John Cunningham McLennan, on a paper 'Rotational anaylsis of the absorption bands of IC1' by William Edward Curtis and J Patkowski[August 1933]
RR/47/117Referee's report by John Cunningham McLennan, on a paper 'On the hyperfine structure of certain Hg I lines in the electrodeless discharge' by T S Subbaraya and T G Srinivasa IyengarApril 1932
RR/47/46Referee's report by John Cunningham McLennan, on a paper 'Velocity of propagation of light in vacuo in a transverse magnetic field' by Clinton Coleridge Farr and C J BanwellApril 1932
RR/48/49Referee's report by John Cunningham McLennan, on a paper 'The thermal expansion of bismuth by X-ray measurements' by A H Jay[September 1933]
NLB/60/712Copy letter from William Bate Hardy, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS18 March 1921
RR/54/74Referee's report by John Cunningham McLennan, on a paper 'Raman spectra of certain organo-metallic compounds' by N Gopala PaiJune 1934
RR/51/30Referee's report by John Cunningham McLennan, on a paper 'The physical basis of the biological effects of high voltage radiations' by William Valentine Mayneord[June 1934]
RR/48/31Referee's report by John Cunningham McLennan, on a paper 'The change in the absorption spectrum of cobalt chloride in aqueous solution with increasing concentration of hydrochloric acid' by Owen Rhys Howell and Albert Jackson[July 1933]
RR/53/146Referee's report by John Cunningham McLennan, on a paper 'The liquefaction of helium by an adiabatic method' by Piotr Leonidovich Kapitza[September 1934]
RR/52/20Referee's report by John Cunningham McLennan, on a paper 'Investigations of Raman spectra Part I—The Raman spectra of sulphuric, nitric, and nitrosylsulphuric acids' by William Rogie Angus and Alan H LeckieDecember 1934
NLB/57/435Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to unknown correspondent7 November 1919
RR/54/17Referee's report by John Cunningham McLennan, on a paper 'Investigations on magne-crystallic action IV Magnetic behaviour of paramagnetic ions in the s-state in crystals' by Kariamanikkam Srinivasa Krishnan and S BanerjeeSeptember 1935
RR/51/60Referee's report by John Cunningham McLennan, on a paper 'On the absorption spectra of the sulphides of zinc, cadmium, and mercury from ? 7000-1900, and the heat of dissociation of sulphur' by P K Sen-gupta[August 1933]
RR/56/1Referee's report by John Cunningham McLennan, on a paper 'Investigations of raman spectra II—The raman spectra of perchloric acid and nitrosyl perchlorate' by William Rogie Angus and Alan H Leckie[March 1935]
RR/53/139Referee's report by John Cunningham McLennan, on a paper 'The magnetic moment of the nucleus of caesium' by Derek Ainslie Jackson[July 1934]
RR/53/156Referee's report by John Cunningham McLennan, on a paper 'Experiments at very low temperatures obtained by the magnetic method I—The production of the low temperatures' by Nicholas Kurti and F Simon[November 1934]
RR/55/59Referee's report by John Cunningham McLennan, on a paper ['The absorption of light in cæsium vapour in the presence of helium'] by H J J Braddick and Robert William DitchburnMarch 1935
RR/56/71Referee's report by John Cunningham McLennan, on a paper 'Characteristics of the adsorption of indium and thallium atoms on tungsten oxide' by Cecil Frank Powell and R L Mercer[February 1935]
NLB/63/319Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS, c/o The High Commissioner for Canada, Victoria Street, S.W.1.18 August 1922
NLB/57/818Copy letter from Sir James Hopwood Jeans, FRS, Secretary of the Royal Society; to Sir Dugald Clerk KBE, FRS13 February 1920
NLB/64/253Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS; Hotel Mont Fleuri, Mentone1 March 1923
NLB/64/197Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS22 February 1923
NLB/64/333Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS15 March 1923
NLB/63/61Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Lord Rayleigh, FRS20 June 1922
NLB/68/303Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Lord Rayleigh [Robert John Strutt], FRS16 June 1925
NLB/65/780Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [Thomas Ralph] Merton, FRS21 December 1923
RR/34/60Referee's report by Alfred Fowler, on a paper 'On the structure of the arc spectrum of gold' by John Cunningham McLennan and A B McLay[June 1926]
NLB/64/845Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Prof. [John Cunningham] McLennan, FRS28 June 1923
NLB/65/647Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [Alfred] Fowler, FRS3 December 1923
NLB/65/650Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS3 December 1923
NLB/65/898Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS25 January 1924
NLB/65/713Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS12 December 1923
NLB/66/73Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Robert John Strutt] Lord Rayleigh, FRS18 February 1924
NLB/66/100Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Prof. [John Cunnigham] McLennan, FRS22 February 1924
NLB/66/166Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Prof. [John Cunningham] McLennan, FRS6 March 1924
NLB/65/771Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS21 December 1923
NLB/67/703Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS18 February 1925
NLB/66/319Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Prof. [Thomas Ralph] Merton, FRS8 April 1924
RR/36/10Referee's report by Alfred Fowler, on a paper 'The luminescence of solid nitrogen under cathode ray bombardment' by John Cunningham McLennan, H J C Ireton and K Thomson[June 1927]
NLB/67/541Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS17 January 1925
NLB/67/587Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS24 January 1925
NLB/67/887Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS1 April 1925
NLB/68/305Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS16 June 1925
NLB/66/918Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS23 September 1924
NLB/71/15Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary, Office of the High Commissioner for Canada, Canadian Building, Trafalgar Square, SW15 December 1927
NLB/69/471Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Cunningham] McLennan, FRS27 April 1926
NLB/69/355Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Cunningham] McLennan, FRS17 March 1926
NLB/70/933Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS8 November 1927
NLB/71/1Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the High Commissioner for Canada, Trafalgar Square, SW11 December 1927
NLB/66/717Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Robert John Strutt] Lord Rayleigh, FRS25 June 1924
IM/002896McLennan, Sir John CunninghamJuly 1936
NLB/20/486Copy letter from Robert William Frederick Harrison, to Charles Thomas Rees Wilson, [Fellow of the Royal Society], The Cavendish Laboratory, Cambridge3 May 1900
NLB/20/622Copy letter from Robert William Frederick Harrison, to Professor John Cunningham McLennan, Toronto, [Fellow of the Royal Society]1 June 1900
NLB/21/300Copy letter from Robert William Frederick Harrison, to John Cunningham McLennan, Toronto23 October 1900
RR/19/85Referee's report by William Mitchinson Hicks, on a paper 'On the constitution of the mercury green line ? = 5461 Å. U., and on the magnetic resolution its satellites by an echelon grating' by John Cunningham McLennan[May 1912]
RR/36/12Referee's report by Samuel Walter Johnson Smith, on a paper 'The magnetic susceptibility of the alkali metals' by John Cunningham McLennan, Richard Ruedy and Elizabeth Cohen[August 1927]
RR/32/96Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'On the origin of the auroral green line 5577 Å, and other spectra associated with aurora borealis' by John Cunningham McLennan and G M Shrum1925
RR/39/85Referee's report by Owen Willans Richardson, on a paper 'The spark spectrum of thallium, Tl II.—Term analysis.—Fine structure of lines' by John Cunningham McLennan, A B McLay and M F Crawford[September 1929]
NLB/58/912Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS3 July 1920
RR/26/96Referee's report by Thomas Ralph Merton, on a paper 'On the structure of the Balmer series lines of hydrogen' by John Cunningham McLennan and P Lowe[July 1921]
RR/50/54Referee's report by Alfred Fowler, on a paper 'The ultraviolet absorption bands of xenon' by John Cunningham McLennan and R TurnbullJanuary 1933
RR/32/97Referee's report by Alfred Fowler, on a paper 'On the series spectrum of gold' by John Cunningham McLennan and A B Mclay16 May 1925
RR/56/69Referee's report by John Cunningham McLennan, on a paper 'The standardization of photo-electric cells for the measurement of visible light' by H H Poole and William Ringrose Gelston Atkins[March 1935]
NLB/65/140Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS10 August 1923
NLB/66/318Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Robert John Strutt] Lord Rayleigh8 April 1924
NLB/20/482Copy letter from Robert William Frederick Harrison, to John Cunningham McLennan, [Fellow of the Royal Society], University of Toronto,Toronto, Canada2 May 1900
RR/50/105Referee's report by John Cunningham McLennan, on a paper 'The first spark spectrum of silver Ag II' by B U R RaoJuly 1934
NLB/60New Letter Book volume 60, copy letters sent from Royal Society administration2 December 1920-26 April 1921
RR/34/59Referee's report by Ralph Howard Fowler, on a paper 'Atomic states and spectral terms' by John Cunningham McLennan, A B McLay and H Grayson Smith[June 1926]
RR/34/61Referee's report by Alfred Fowler, on a paper 'On the series spectra of palladium' by John Cunningham McLennan and H Grayson Smithnd [1926]
MC/32/178Letter from Hotel Alexandra, Dovercourt Bay, Harwich, to Dr [Arthur] Schuster, [Royal Society]25 June 1917
RR/39/86Referee's report by Robert Robinson, on a paper 'The action of high speed cathode rays on acetylene' by John Cunningham McLennan, M W Perrin and H J C Ireton[June 1929]
RR/56/74Referee's report by John Cunningham McLennan, on a paper 'Fluorescent emission of the mercury line 2537 A at pressures between 10-3 and 10-1 mm' by Peter Pringsheim and O D Saltmarsh[August 1935]
RR/36/11Referee's report by Alfred Fowler, on a paper 'On the wave-length of the green auroral line in the oxygen spectrum' by John Cunningham McLennan and J H McLeodnd [1927]
RR/14/193Referee's report by Arthur Schuster, on a paper 'Electrical conductivity in gases traversed by cathode rays' by John Cunningham McLennan14 January 1900
RR/27/110Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'On the structure of the wavelength = 6708 A. of the isotopes of lithium' by John Cunningham McLennan and D S AinslieApril 1922
RR/31/25Referee's report by Robert Strutt, Lord Rayleigh, on a paper 'On the luminescence of nitrogen, argon, and other condensed gases at very low temperatures' by John Cunningham McLennan and G M Shrum[June 1924]
RR/36/9Referee's report by Owen Willans Richardson, on a paper 'Intensities in the secondary spectrum of hydrogen at various temperatures' by John Cunningham McLennan, H Grayson Smith and W T Collins[July 1927]
RR/42/94Referee's report by Alfred Fowler, on a paper 'The fine-structure of some lines in the visible region of the spectrum of thallium III' by John Cunningham McLennan and Elizabeth J Allin10 July 1930
RR/42/96Referee's report by Alfred Fowler, on a paper 'Zeeman effects for fine structure components of thallium spectral lines' by John Cunningham McLennan and A M I A W Durnford10 July 1930
RR/42/98Referee's report by Alfred Fowler, on a paper 'Spark spectra of bismuth, Bi II and Bi III. Evidence of hyperfine structure' by John Cunningham McLennan, A B McLay and M F Crawford September 1930
RR/42/99Referee's report by Robert John Strutt, Lord Rayleigh on a paper 'On the absorption of light by gaseous, liquid and solid xenon' by John Cunningham McLennan and R TurnbullJuly 1930
RR/43/109Referee's report by Ralph Howard Fowler, on a paper 'Interpretation of hyperfine structure.—Discussion of H. F. S. in Tl II. Relative g (I) factors of Tl, Bi and Pb (207), and nuclear structure' by John Cunningham McLennan, A B McLay and M F CrawfordAugust 1931
RR/48/120Referee's report by Piotr Leonidovich Kapitza, on a paper 'The phenomena of superconductivity with alternating currents of high frequency' by John Cunningham McLennan, A C Burton, A Pitt and J O Wilhelm[February 1932]
RR/48/121Referee's report by Alfred Fowler, on a paper 'Further experiments on superconductivity with alternating currents of high frequency' by John Cunningham McLennan, A C Burton, A Pitt and J O Wilhelm[September 1932]
RR/48/131Referee's report by John Cunningham McLennan, on a paper 'The influence of pressure on the dielectric constant of carbon dioxide up to 1000 atmospheres between 25° and 150° C' by A Michels and C Michels[August 1932]
RR/53/16Referee's report by John Cunningham McLennan, on a paper 'Investigations on magne-crystallic action III—Further studies on organic crystals' by Kariamanikkam Srinivasa Krishnan and S Banerjee[October 1934]
RR/56/82Referee's report by John Cunningham McLennan, on a paper 'The action of X-rays on certain bacteria' by A T Pugsley, T H Oddie and C E Eddy19 March 1935
MC/30/124Letter from [John Cunningham] McLennan, The Berners Hotel, Berners Street, London, W18 September 1915
NLB/51/752Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Cunningham McLennan FRS, c/o William Ramsay, Bowland, Stow, Midlothian17 June 1915
MC/31/108Letter from [John Cunningham] McLennan, The Berners Hotel, Berner Street, London, W, to Professor [Arthur] Schuster, [Royal Society]2 July 1916
MC/37/89Telegraph from [John Cunningham] McLennan, Toronto, to the Royal Society, Burlington House, Piccadilly, London26 October 1923
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