| RefNo | Title | Date |
| IM/002895 | McLennan, Sir John Cunningham | nd |
| EC/1915/09 | McLennan, Sir John Cunningham: certificate of election to the Royal Society | |
| IM/002894 | McLennan, Sir John Cunningham | September 1920 |
| NLB/63/284 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Professor [John Cunnigham] McLennan, FRS | 03 August 1922 |
| NLB/20/354 | Copy letter from Robert William Frederick Harrison, to John Cunningham McLennan, [Fellow of the Royal Society], The University, Toronto | 29 March 1900 |
| NLB/51/752 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Cunningham McLennan FRS, c/o William Ramsay, Bowland, Stow, Midlothian | 17 June 1915 |
| RR/19/84 | Referee's report by William Mitchinson Hicks, on a paper 'On the series lines in the arc spectrum of Mercury' by John Cunningham McLennan | nd [1912] |
| RR/55/86 | Referee's report by John Cunningham McLennan, on a paper 'Ultra-violet absorption of ice' by E J Cassel | August 1935 |
| NLB/54/593 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 26 June 1917 |
| NLB/53/339 | Copy 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/54/606 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Messrs Harrison & Sons | 2 July 1917 |
| RR/27/112 | Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'On the fluorescence of aesculin' by John Cunningham McLennan and F M Cale | August 1922 |
| RR/22/81 | Referee'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 Henderson | June 1915 |
| RR/26/95 | Referee's report by Alfred Fowler, on a paper 'On the emission and absorption spectra of mercury' by John Cunningham McLennan and W W Shaver | 11 July 1921 |
| RR/27/114 | Referee'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 Clark | September 1922 |
| RR/32/40 | Referee'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 Carroll | June 1925 |
| RR/25/26 | Referee'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 Fuller | nd [1918] |
| RR/26/93 | Referee's report by Alfred Fowler, on a paper 'The spectrum of ionised potassium' by John Cunningham McLennan | 11 July 1921 |
| RR/26/94 | Referee's report by Alfred Fowler, on a paper 'On the refractive indices of mercury and thallium vapours' by John Cunningham McLennan | 11 July 1921 |
| RR/37/106 | Referee'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 Samson | July 1928 |
| RR/40/59 | Referee'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/27/113 | Referee'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 Clark | July 1922 |
| RR/37/108 | Referee's report by Alfred Fowler, on a paper 'The zeeman effect for the spectrum of tantalum' by John Cunningham McLennan and I A W Durnford | July 1928 |
| NLB/64/468 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 19 April 1923 |
| RR/29/75 | Referee's report by John Cunningham McLennan, on a paper 'The thermionic and photo-electric properties of the electro-positive metals' by A F A Young | July 1923 |
| RR/27/111 | Referee'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 Cale | July 1922 |
| RR/52/103 | Referee's report by John Cunningham McLennan, on a paper 'The stark effect in the molecular spectrum of hydrogen' by Hawley Snell | May 1934 |
| RR/30/8 | Referee's report by John Cunningham McLennan, on a paper 'Note on Vegard's theory of the aurora' by Robert d'Escourt Atkinson | 24 July 1924 |
| NLB/56/160 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 4 December 1918 |
| NLB/68/306 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to the Lord Rayleigh [Robert John Strutt], FRS | 16 June 1925 |
| NLB/60/642 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 8 March 1921 |
| NLB/58/816 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 22 June 1920 |
| NLB/66/664 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Robert John Strutt] Lord Rayleigh, FRS | 16 June 1924 |
| RR/50/99 | Referee's report by John Cunningham McLennan, on a paper 'The first spark spectrum of gold. Au II' by Raghavendra B. V. Rao | May 1933 |
| NLB/59/230 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 29 July 1920 |
| RR/37/107 | Referee's report by Frederick George Donnan, on a paper 'On the decomposition of ammonia by high-speed electrons' by John Cunningham McLennan and Gilbert Greenwood | July 1928 |
| RR/37/109 | Referee'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 Cohen | September 1928 |
| NLB/59/237 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 30 July 1920 |
| RR/42/97 | Referee's report by Alfred Fowler, on a paper 'On the spectroscopy of auroral green line radiation' by John Cunningham McLennan and H J C Ireton | 7 July 1930 |
| RR/42/17 | Referee'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 Read | September 1931 |
| RR/39/84 | Referee'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 Crawford | 10 June 1929 |
| RR/47/133 | Referee's report by John Cunningham McLennan, on a paper 'The nuclear spin of arsenic' by Samuel Tolansky | May 1932 |
| RR/43/107 | Referee's report by Alfred Fowler, on a paper 'Arc spectrum of gold' by John Cunningham McLennan and A B McLay | September 1931 |
| RR/48/48 | Referee'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/14/194 | Referee's report by George Francis Fitzgerald, on a paper 'Electrical conductivity in gases traversed by cathode rays' by John Cunningham McLennan | 7 February 1900 |
| RR/40/64 | Referee'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 Rayleigh | 1930 |
| RR/43/106 | Referee's report by Owen Willans Richardson, on a paper 'The hyperfine structure of Tl II' by John Cunningham McLennan and M F Crawford | April 1931 |
| RR/34/62 | Referee'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/42/95 | Referee'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 McLennan | August 1930 |
| RR/50/98 | Second referee's report by John Cunningham McLennan, on a paper 'The first spark spectrum of gold. Au II' by Raghavendra B. V. Rao | January 1934 |
| RR/14/195 | Referee's report by Oliver Joseph Lodge, on a paper 'Electrical conductivity in gases traversed by cathode rays' by John Cunningham McLennan | nd [March 1900] |
| RR/43/61 | Referee's report by John Cunningham McLennan, on a paper 'Notes on the spectrum of gold' by William Mitchinson Hicks | March 1932 |
| RR/43/108 | Referee's report by Alfred Fowler, on a paper 'Spark spectrum of mercury, Hg II' by John Cunningham McLennan, A B McLay and M F Crawford | September 1931 |
| NLB/60/296 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 13 January 1921 |
| NLB/60/387 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 27 January 1921 |
| RR/45/112 | Referee'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/48/42 | Referee's report by John Cunningham McLennan, on a paper 'On metallic dispersion in the near infra-red' by C Hurst | [November 1933] |
| RR/51/42 | Referee'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/47/87 | Referee's report by John Cunningham McLennan, on a paper 'The stark effect for xenon' by H W Harkness and J F Heard | September 1932 |
| RR/51/25 | Referee'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/47/48 | Referee'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 Banwell | April 1932 |
| RR/46/110 | Referee'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/49/86 | Referee'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/47/117 | Referee'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 Iyengar | April 1932 |
| RR/47/46 | Referee'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 Banwell | April 1932 |
| RR/48/49 | Referee'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/60/712 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 18 March 1921 |
| RR/54/74 | Referee's report by John Cunningham McLennan, on a paper 'Raman spectra of certain organo-metallic compounds' by N Gopala Pai | June 1934 |
| RR/51/30 | Referee'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/48/31 | Referee'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/53/146 | Referee's report by John Cunningham McLennan, on a paper 'The liquefaction of helium by an adiabatic method' by Piotr Leonidovich Kapitza | [September 1934] |
| RR/52/20 | Referee'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 Leckie | December 1934 |
| NLB/57/435 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to unknown correspondent | 7 November 1919 |
| RR/54/17 | Referee'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 Banerjee | September 1935 |
| RR/51/60 | Referee'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/56/1 | Referee'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/53/139 | Referee's report by John Cunningham McLennan, on a paper 'The magnetic moment of the nucleus of caesium' by Derek Ainslie Jackson | [July 1934] |
| RR/53/156 | Referee'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/55/59 | Referee'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 Ditchburn | March 1935 |
| RR/56/71 | Referee'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/63/319 | Copy 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/57/818 | Copy letter from Sir James Hopwood Jeans, FRS, Secretary of the Royal Society; to Sir Dugald Clerk KBE, FRS | 13 February 1920 |
| NLB/64/253 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS; Hotel Mont Fleuri, Mentone | 1 March 1923 |
| NLB/64/197 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 22 February 1923 |
| NLB/64/333 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 15 March 1923 |
| NLB/63/61 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Lord Rayleigh, FRS | 20 June 1922 |
| NLB/68/303 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Lord Rayleigh [Robert John Strutt], FRS | 16 June 1925 |
| NLB/65/780 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [Thomas Ralph] Merton, FRS | 21 December 1923 |
| RR/34/60 | Referee'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/64/845 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Prof. [John Cunningham] McLennan, FRS | 28 June 1923 |
| NLB/65/647 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [Alfred] Fowler, FRS | 3 December 1923 |
| NLB/65/650 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS | 3 December 1923 |
| NLB/65/898 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 25 January 1924 |
| NLB/65/713 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS | 12 December 1923 |
| NLB/66/73 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Robert John Strutt] Lord Rayleigh, FRS | 18 February 1924 |
| NLB/66/100 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Prof. [John Cunnigham] McLennan, FRS | 22 February 1924 |
| NLB/66/166 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Prof. [John Cunningham] McLennan, FRS | 6 March 1924 |
| NLB/65/771 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 21 December 1923 |
| NLB/67/703 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 18 February 1925 |
| NLB/66/319 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Prof. [Thomas Ralph] Merton, FRS | 8 April 1924 |
| RR/36/10 | Referee'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/67/541 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 17 January 1925 |
| NLB/67/587 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 24 January 1925 |
| NLB/67/887 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 1 April 1925 |
| NLB/68/305 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 16 June 1925 |
| NLB/66/918 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 23 September 1924 |
| NLB/71/15 | Copy 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, SW1 | 5 December 1927 |
| NLB/69/471 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Cunningham] McLennan, FRS | 27 April 1926 |
| NLB/69/355 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Cunningham] McLennan, FRS | 17 March 1926 |
| NLB/70/933 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 8 November 1927 |
| NLB/71/1 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the High Commissioner for Canada, Trafalgar Square, SW1 | 1 December 1927 |
| NLB/66/717 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Robert John Strutt] Lord Rayleigh, FRS | 25 June 1924 |
| IM/002896 | McLennan, Sir John Cunningham | July 1936 |
| NLB/20/486 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Rees Wilson, [Fellow of the Royal Society], The Cavendish Laboratory, Cambridge | 3 May 1900 |
| NLB/20/622 | Copy letter from Robert William Frederick Harrison, to Professor John Cunningham McLennan, Toronto, [Fellow of the Royal Society] | 1 June 1900 |
| NLB/21/300 | Copy letter from Robert William Frederick Harrison, to John Cunningham McLennan, Toronto | 23 October 1900 |
| RR/19/85 | Referee'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/36/12 | Referee'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/32/96 | Referee'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 Shrum | 1925 |
| RR/39/85 | Referee'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/58/912 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Cunningham] McLennan, FRS | 3 July 1920 |
| RR/26/96 | Referee'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/50/54 | Referee's report by Alfred Fowler, on a paper 'The ultraviolet absorption bands of xenon' by John Cunningham McLennan and R Turnbull | January 1933 |
| RR/32/97 | Referee's report by Alfred Fowler, on a paper 'On the series spectrum of gold' by John Cunningham McLennan and A B Mclay | 16 May 1925 |
| RR/56/69 | Referee'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/65/140 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS | 10 August 1923 |
| NLB/66/318 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Robert John Strutt] Lord Rayleigh | 8 April 1924 |
| NLB/20/482 | Copy letter from Robert William Frederick Harrison, to John Cunningham McLennan, [Fellow of the Royal Society], University of Toronto,Toronto, Canada | 2 May 1900 |
| RR/50/105 | Referee's report by John Cunningham McLennan, on a paper 'The first spark spectrum of silver Ag II' by B U R Rao | July 1934 |
| NLB/60 | New Letter Book volume 60, copy letters sent from Royal Society administration | 2 December 1920-26 April 1921 |
| RR/34/59 | Referee'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/34/61 | Referee's report by Alfred Fowler, on a paper 'On the series spectra of palladium' by John Cunningham McLennan and H Grayson Smith | nd [1926] |
| RR/39/86 | Referee'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/56/74 | Referee'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/36/11 | Referee'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 McLeod | nd [1927] |
| RR/14/193 | Referee's report by Arthur Schuster, on a paper 'Electrical conductivity in gases traversed by cathode rays' by John Cunningham McLennan | 14 January 1900 |
| RR/27/110 | Referee'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 Ainslie | April 1922 |
| RR/31/25 | Referee'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/36/9 | Referee'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/42/94 | Referee'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 Allin | 10 July 1930 |
| RR/42/96 | Referee'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 Durnford | 10 July 1930 |
| RR/42/98 | Referee'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/42/99 | Referee'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 Turnbull | July 1930 |
| RR/43/109 | Referee'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 Crawford | August 1931 |
| RR/48/120 | Referee'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/48/121 | Referee'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/48/131 | Referee'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/53/16 | Referee'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/56/82 | Referee'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 Eddy | 19 March 1935 |