| RefNo | Title | Date |
| EC/1892/10 | Fleming, Sir John Ambrose: certificate of election to the Royal Society | |
| IM/001447 | Fleming, John Ambrose | nd |
| MM/18/16 | Fragment of a letter from John Ambrose Fleming | nd |
| IM/Maull/001446 | Fleming, John Ambrose | nd |
| MS/525/6/10/1 | 'Improvements in range finders': copy provisional patent specification by John Ambrose Fleming | March 1915 |
| NLB/4/435 | Copy letter from Herbert Rix, to Dr John Ambrose Fleming, 9 Clifton Gardens, Maida Hill, W. | 29 May 1890 |
| NLB/3/1084 | Copy letter from an unknown correspondent, to Messrs Drake & Gorham | 7 January 1890 |
| NLB/3/1058 | Copy letter from Herbert Rix, to Dr John Ambrose Fleming | 2 January 1890 |
| NLB/3/1071 | Copy letter from an unknown correspondent, to Messrs Drake & Gorham | 4 January 1890 |
| NLB/7/983 | Copy letter from Herbert Rix, to Professor John Ambrose Fleming, Fellow of the Royal Society | 12 June 1893 |
| NLB/7/993 | Copy letter from Herbert Rix, to Dr John Ambrose Fleming, Fellow of the Royal Society, 9 Clifton Gardens, Maida Hill, W. | 13 June 1893 |
| NLB/7/1065 | Copy letter from Herbert Rix, to Dr John Ambrose Fleming, Fellow of the Royal Society | 27 June 1893 |
| NLB/26/230 | Copy letter from Robert William Frederick Harrison to, Professor John Ambrose Fleming, Fellow of the Royal Society | 13 February 1903 |
| NLB/13/3 | Copy letter from an unknown correspondent, to Collings & Company | 27 May 1896 |
| NLB/13/20 | Copy letter from Robert William Frederick Harrison, to Lord Rayleigh [John William Strutt], Secretary, Royal Society | 29 May 1896 |
| NLB/13/168 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society, University College, Gower Street, W.C. | 24 June 1896 |
| NLB/13/526 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 3 October 1896 |
| NLB/14/200 | Copy letter from Arthur William Rucker, to Professor John Ambrose Fleming, Fellow of the Royal Society | 20 January 1897 |
| RR/15/236 | Referee's report by John Ambrose Fleming, on a paper 'The action of magnetised electrodes upon electrical discharge phenomena in rarefied gases' by C E S Phillips | March 1901 |
| NLB/14/793 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 21 May 1897 |
| RR/15/283 | Letter from John Ambrose Fleming, on a paper 'On a suggested relation between the refractive indices of pure metals and their molecular constants' by W Williams to Robert William Frederick Harrison, Assistant Secretary of the Royal Society | 27 March 1901 |
| RR/17/39 | Referee's report [page 2] by Hector Munro Macdonald, on a paper 'A note on the theory of directive antennæ or unsymmetrical hertzian oscillators' by John Ambrose Fleming | 30 March 1906 |
| RR/15/58 | Referee's report by John Ambrose Fleming, on a paper 'Lines of induction in a magnetic field' by Henry Selby Hele-Shaw and Alfred Hay | 28 June 1900 |
| RR/17/226 | Letter from John Ambrose Fleming, regarding a paper 'Alternate current measurement' by W E Sumpner | 8 November 1907 |
| RR/17/227 | Referee's report by John Ambrose Fleming, on a paper 'Alternate current measurement' by W E Sumpner | [November 1907] |
| NLB/22/229 | Copy letter from Robert William Frederick Harrison, to Professor [John Ambrose] Fleming, Fellow of the Royal Society, Pender Laboratory, University College, Gower Street, W.C. | 28 March 1901 |
| NLB/23/2/427 | Copy letter sent from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 11 January 1904 |
| NLB/24/401 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 9 May 1902 |
| NLB/26/290 | Copy letter from Robert William Frederick Harrison to, Professor John Ambrose Fleming, Fellow of the Royal Society | 24 February 1903 |
| NLB/24/630 | Copy telegram from Royal Society, to Professor [John Ambrose] Fleming, [Fellow of the Royal Society], 212 Finchley Road, N.W. | [June 1902] |
| NLB/24/587 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 5 June 1902 |
| NLB/26/536 | Copy letter from Robert William Frederick Harrison to, Professor [John Ambrose] Fleming, Fellow of the Royal Society | 8 April 1903 |
| RR/17/390 | Referee's report by John Ambrose Fleming, on a paper 'The theory of the dynamometer wattmeter' by J A Drysdale | 22 February 1909 |
| NLB/30/441 | Copy letter from Robert William Frederick Harrison, to John Ambrose Fleming, Fellow of the Royal Society | 24 March 1905 |
| NLB/30/737 | Copy letter from Robert William Frederick Harrison, to Professor John Amborse Fleming, Fellow of the Royal Society | 15 May 1905 |
| NLB/30/731 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 12 May 1905 |
| NLB/31/844 | Copy letter from Robert William Frederick Harrison, to Dr John Ambrose Fleming, Fellow of the Royal Society | 23 November 1905 |
| NLB/32/849 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 1 June 1906 |
| NLB/32/866 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society, University College, Gower Street, W.C. | 8 June 1906 |
| NLB/32/898 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society, University College, W.C. | 13 June 1906 |
| NLB/35/50 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 10 April 1907 |
| NLB/35/454 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 3 June 1907 |
| NLB/37/902 | Copy Letter from Robert William Frederick Harrison to Dr J [John] A [Ambrose] Fleming, Fellow of the Royal Society | 1 June 1908 |
| NLB/37/515 | Copy letter from Robert William Frederick Harrison to Professor J [John] A [Ambrose] Fleming, Fellow of the Royal Society | 1 April 1908 |
| NLB/42/55 | Copy letter from Robert William Frederick Harrison to M Charles Delagrave, 15 Rue Souffict, Paris | 17 March 1910 |
| NLB/42/202 | Copy letter from Robert William Frederick Harrison to Professor J [John] A [Ambrose] Fleming FRS | 23 April 1910 |
| NLB/43/311 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 8 December 1910 |
| NLB/43/110 | Copy letter from Joseph Larmor, to Professor John Ambrose Fleming, Fellow of the Royal Society | 7 November 1910 |
| NLB/42/43 | Copy letter from Robert William Frederick Harrison to Professor J [John] A [Ambrose] Fleming FRS | 14 March 1910 |
| NLB/46/242 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society | 28 June 1912 |
| NLB/50/18 | Copy letter from Robert William Frederick Harrison, to Professor [John Ambrose] Fleming, Fellow of the Royal Society | 8 April 1914 |
| NLB/51/30 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Ambrose Fleming FRS | 23 November 1914 |
| NLB/50/404 | Copy letter from Charles Herbert Lees, to Professor [John Ambrose] Fleming, [Fellow of the Royal Society] | [July 1914] |
| NLB/50/524 | Copy letter from Charles Herbert Lees, to Professor [John Ambrose] Fleming, [Fellow of the Royal Society] | 22 July 1914 |
| NLB/51/81 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Ambrose Fleming FRS | 7 December 1914 |
| NLB/51/803 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Ambrose Fleming FRS | 2 July 1915 |
| RR/29/8 | Referee's report by John Ambrose Fleming, on a paper 'Investigations on the paramagnetism of crystals at low temperatures' by L C Jackson | June 1923 |
| AP/59/2/2 | Unpublished diagrams, 'Induced currents in liquid circuits' by John Ambrose Fleming | 1877 |
| MS/929/1/55 | Letter from [John Ambrose] Fleming, FRS, to James Mackenzie Davidson | 16 June 1917 |
| MS/929/2/1 | Copy letter from James Mackenzie Davidson, 26 Park Crescent, Portland Place, to Professor [John Ambrose] Fleming, FRS | 15 June 1914 |
| RR/13/57 | Letter from John Ambrose Fleming, on a paper 'The measurement of high potential difference' by H C Leake, R Leventhorpe and C S Whitehead to the Secretary of the Royal Society | 14 February 1896 |
| RR/11/251 | Referee's report by John Ambrose Fleming, on a paper 'Magnetic qualities of iron' by James Alfred Ewing and Helen G Klaassen | 8 July 1893 |
| RR/11/259 | Referee's report by John Ambrose Fleming, on a paper 'The effects of mechanical stress on the electrical resistance of metals' by James H Gray and James B Henderson | 6 March 1893 |
| NLB/57/327 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Richard [Tetley] Glazebrook, FRS, Chairman of the Physics Committee | 17 October 1919 |
| NLB/62/44 | Copy letter from Frederick Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Ambrose] Fleming, FRS | 23 November 1921 |
| NLB/65/178 | Copy letter from [James Hopwood Jeans, Secretary of the Royal Society]; to Lord Rayleigh [Robert John Strutt], FRS | 8 September 1923 |
| NLB/65/16 | Copy letter from [James Hopwood Jeans, Secretary of the Royal Society]; to Lord Rayleigh [Robert John Strutt], FRS | 13 July 1923 |
| NLB/65/928 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS | 31 January 1924 |
| MS/525/6/10/13 | Letter from John Ambrose Fleming, the Pender Electrical Laboratory, University College, Gower Street, London | 8 June 1915 |
| NLB/13/186 | Copy letter from Robert William Frederick Harrison, to Professor John Ambrose Fleming, Fellow of the Royal Society, University College, Gower Street, W.C. | 26 June 1896 |
| RR/15/282 | Referee's report by John Ambrose Fleming, on a paper 'On a suggested relation between the refractive indices of pure metals and their molecular constants' by W Williams | 25 March 1901 |
| RR/16/108 | Referee's report by John Ambrose Fleming, on a paper 'Studies in magnetic testing' by George Frederick Charles Searle | January 1904 |
| RR/17/38 | Referee's report [page 1] by Hector Munro Macdonald, on a paper 'A note on the theory of directive antennæ or unsymmetrical hertzian oscillators' by John Ambrose Fleming | 30 March 1906 |
| NLB/22/218 | Copy letter from Robert William Frederick Harrison, to Professor [John Ambrose] Fleming, Fellow of the Royal Society | 26 March 1901 |
| NLB/37/308 | Copy letter from Robert William Frederick Harrison to Professor J [John] A [Ambrose] Fleming, Fellow of the Royal Society | 28 February 1908 |
| RR/31/54 | Referee's report by John Ambrose Fleming, on a paper 'On the electrical conductivity of magnetite' by Ernest Wilson and [Edward Felix] Herroun | [January 1924] |
| NLB/36/883 | Copy letter from Robert William Frederick Harrison, to James Swinburne, Fellow of the Royal Society | 7 January 1908 |
| RR/16/195 | Referee's report by John Ambrose Fleming, on a paper 'Two-dimensional problems in magnetic induction, with special reference to flux distribution in toothed-core armatures' by Henry Selby Hele-Shaw, Alfred Hay and P H Powell | March 1904 |
| RR/8/20 | Letter from John Ambrose Fleming, to George Gabriel Stokes, regarding a paper 'On magneto-electric induction in liquids and gases.—Part I. production of induced currents in electrolytes' by John Ambrose Fleming | 12 November 1877 |
| RR/12/334 | Referee's report by John Ambrose Fleming, on a paper 'Alternate current dynamo-electric machines' by John Hopkinson and E Wilson | 26 April 1895 |
| NLB/57 | New Letter Book volume 57, copy letters sent from Royal Society administration | 27 June 1919-27 February 1920 |
| RR/28/125 | Referee's report by John Ambrose Fleming, on two papers 'The distribution of the magnetic field and return current round a submarine cable carrying alternating current.—Part 1' by Charles V Drysdale and 'The distribution of the magnetic field and return current round a submarine cable carrying alternating current. —Part 2' by S Butterworth | [September 1923] |
| AP/59/2/3 | Unpublished diagram, experimental setup by John Ambrose Fleming | 1877 |
| RR/8/18 | Second referee's report by George Carey Foster, on a paper 'On magneto-electric induction in liquids and gases.—Part I. production of induced currents in electrolytes' by John Ambrose Fleming | 31 July 1877 |
| AP/59/2 | Unpublished paper, 'On magneto-electric induction in liquid and gaseous conductors. Part I - Production of induced currents in electrolytes' by J A [John Ambrose] Fleming | 1877 |
| AP/59/2/1 | Unpublished manuscript, 'On magneto-electric induction in liquid and gaseous conductors. Part I - Production of induced currents in electrolytes' by J A [John Ambrose] Fleming | 1877 |
| NLB/3/1056 | Copy letter from Herbert Rix, to Dr John Ambrose Fleming, 9 Clifton Gardens, Maida Hill, W. | 1 January 1890 |
| RR/14/208 | Referee's report by John Ambrose Fleming, on a paper 'On the recovery of iron from overstrain' by James Muir | nd [February 1899] |
| RR/15/15 | Referee's report by John Ambrose Fleming, on a paper 'An artificial retina and the theory of vision' by Jagadish Chunder Bose | 26 June 1900 |
| RR/8/17 | Referee's report by George Carey Foster, on a paper 'On magneto-electric induction in liquids and gases.—Part I. production of induced currents in electrolytes' by John Ambrose Fleming | 30 July 1877 |
| RR/8/19 | Referee's report by James Clerk Maxwell, on a paper 'On magneto-electric induction in liquids and gases.—Part I. production of induced currents in electrolytes' by John Ambrose Fleming | 16 October 1877 |
| RR/13/56 | Referee's report by John Ambrose Fleming, on a paper 'The measurement of high potential difference' by H C Leake, R Leventhorpe and C S Whitehead | 21 January 1896 |
| RR/13/58 | Letter from Joseph John Thomson, on a paper 'The measurement of high potential difference' by H C Leake, R Leventhorpe and C S Whitehead to John Ambrose Fleming | 16 February 1896 |
| RR/13/59 | Letter from John Ambrose Fleming, on a paper 'The measurement of high potential difference' by H C Leake, R Leventhorpe and C S Whitehead to the Secretary of the Royal Society | 17 February 1896 |
| RR/15/252 | Referee's report by John Ambrose Fleming, on a paper 'The measurement of magnetic hysteresis' by George Frederick Charles Searle and T G Bedford | May 1901 |
| RR/19/89 | Referee's report by John Ambrose Fleming, on a paper 'An investigation into the magnetic behavior of iron and some other metals under the oscillatory discharge from a condenser' by E W Marchant | [January 1913] |
| RR/22/95 | Letter from John Ambrose Fleming to Robert William Frederick Harrison, Assistant Secretary of the Royal Society | 12 August 1915 |
| RR/31/75 | Referee's report by John Ambrose Fleming, on a paper 'Experiments on the effects of resistance in the oscillating circuit of a triode' by J H Vincent and A L Beak | 8 January 1925 |
| PP/15/10 | Paper, 'On electric discharge between electrodes at different temperatures in air and in high vacua' by J A [John Ambrose] Fleming | 1889 |
| MC/16/39 | Letter from [John Ambrose] Fleming, 9 Clifton Gardens, Maida Hill, London, to the Secretaries of the Royal Society | 23 May 1893 |
| MC/16/321 | Letter from [John Ambrose] Fleming, University College, London, Gower Street, to Lord Rayleigh [John William Strutt], Secretary of the Royal Society | 12 June 1896 |
| MC/16 | Volume 16 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1893-1896 |