| RefNo | Title | Date |
| MS/377/1/112 | Letter from Arnold William Reinold, 9 Vanburgh Park Road, Blackheath, to William Fletcher Barrett | 5 May 1906 |
| EC/1883/13 | Reinold, Arnold William: certificate of election to the Royal Society | |
| MS/377/1/113 | Letter from Arnold William Reinold, 9 Vanburgh Place, Blackheath, to [William Fletcher] Barrett | 5 November 1906 |
| NLB/6/289 | Copy letter from Herbert Rix, to Professor Arnold William Reinold | 7 April 1892 |
| NLB/7/1079 | Copy letter from Herbert Rix, to Messrs Harrison & Sons | 27 June 1893 |
| NLB/5/859 | Copy letter from Herbert Rix, to Professor Arthur William Reinold, Fellow of the Royal Society | 6 November 1891 |
| NLB/5/923 | Copy letter from Theodore E James, to Professor Reinold, Fellow of the Royal Society | 17 November 1891 |
| NLB/7/817 | Copy letter from Herbert Rix, to Mr Collings | 2 May 1893 |
| NLB/7/834 | Copy letter from Herbert Rix, to Mr Collings | 5 May 1893 |
| NLB/10/115 | Copy letter from Herbert Rix, to Messrs Robarts, Lubbock & Company, 15 Lombard Street, E.C. | 2 October 1894 |
| NLB/12/120 | Copy letter from Theodore E James, to Messrs Harrison & Sons | [9 December 1895] |
| RR/15/140 | Referee's report by Arnold William Reinold, on a paper 'The velocity of the ions produced in gases by rontgen rays' by John Zeleny | 2 March 1900 |
| NLB/15/401 | Copy letter from Robert William Frederick Harrison, to Lord Rayleigh [John William Strutt], Fellow of the Royal Society | 21 September 1897 |
| NLB/17/319 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons | 8 October 1898 |
| NLB/17/736 | Copy letter from Theodore E James, to Messrs Harrison & Sons | 14 December 1898 |
| NLB/20/135 | Copy letter from Robert William Frederick Harrison, to Professor George Carey Foster, Fellow of the Royal Society | 10 February 1900 |
| NLB/20/236 | Copy letter from Robert William Frederick Harrison, to Professor Arnold William Reinold, Fellow of the Royal Society | 5 March 1900 |
| NLB/27/713 | Copy letter from Robert William Frederick Harrison, to Professor Arnold William Reinold, Fellow of the Royal Society | 18 November 1903 |
| NLB/57/212 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to unknown correspondent | 30 August 1919 |
| NLB/54/87 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Arnold William] Reinold, FRS | 5 February 1917 |
| RR/13/13 | Referee's report by Arnold William Reinold, on a paper 'On the calibration of the capillary electrometer' by George James Bruch | 30 July 1895 |
| RR/9/182 | Referee's report by John William Strutt, Lord Rayleigh, on a paper 'The limiting thickness of liquid films' by Arnold William Reinold and Arthur William Rücker | 1883 |
| RR/8/336 | Referee's report by John William Strutt, Lord Rayleigh, on a paper 'On the electrical resistance of thin liquid films, with a revision of Newton’s table of colours' by Arnold William Reinold and Arthur William Rucker | 27 April 1881 |
| RR/11/24 | Referee's report by Arnold William Reinold, on a paper 'On the time-relations of the excursions of the capillary electrometer, with a description of the method of using it for the investigation of electrical changes of short duration' by George James Burch | 1891 |
| RR/13/313 | Referee's report by Arnold William Reinold, on a paper 'Condensation of water vapour in the presence of dust-free air and other gases' by Charles Thomson Rees Wilson | 5 April 1897 |
| RR/13/234 | Referee's report by Arnold William Reinold, on a paper 'On contact electricity of metals' by J Erskine Murray | 11 September 1897 |
| NLB/60/732 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Arnold William] Reinold, FRS | 19 March 1921 |
| RR/13/203 | Referee's report by Arnold William Reinold, on a paper 'Electrification of air, of vapour of water, and of other gases' by William Thomson, Magnus Maclean and Alexander Galt | 12 July 1897 |
| NLB/60/620 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Arnold William] Reinold, FRS | 3 March 1921 |
| RR/14/108 | Referee's report by Arnold William Reinold, on a paper 'On the condensation nuclei produced in gases by the action of Röntgen rays. Uranium rays, ultra-violet light, and other agents' by Charles Thomson Rees Wilson | 19 December 1898 |
| NLB/60/582 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Arnold William] Reinold, FRS | 26 February 1921 |
| NLB/60/756 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Arnold William] Reinold, FRS | 23 March 1921 |
| NLB/60/895 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Executors of the late Professor [Arnold William] Reinold; East Cosham House, Hants | 22 April 1921 |
| NLB/61/906 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir [James Blacklock] Henderson; Admiralty Research Laboratory, Royal Naval College, S.E.10. | 10 November 1921 |
| RR/14/239 | Referee's report by Arnold William Reinold, on a paper 'On the nature of electrocapillary phenomena.—I. Their relation to the potential differences between solutions' by Samuel Walter Johnson Smith | nd [February 1899] |
| RR/9/392 | Referee's report by Arthur Schuster, on a paper 'On the relation between the thickness and the surface tension of liquid films' by Arnold William Reinold and Arthur William Rucker | 1886 |
| RR/9/393 | Referee's report by Robert Bellamy Clifton, on a paper 'On the relation between the thickness and the surface tension of liquid films' by Arnold William Reinold and Arthur William Rucker | 16 September 1886 |
| RR/14/274 | Referee's report by Arnold William Reinold, on a paper 'On the comparative efficiency as condensation nuclei of positively and negatively charged ions' by Charles Thomson Rees Wilson | 3 July 1899 |
| NLB/60 | New Letter Book volume 60, copy letters sent from Royal Society administration | 2 December 1920-26 April 1921 |
| NLB/57 | New Letter Book volume 57, copy letters sent from Royal Society administration | 27 June 1919-27 February 1920 |
| RR/15/307 | Referee's report by Arnold William Reinold, on a paper 'Electro-molecular wave' by Jagadis Chunder Bose | 23 April 1902 |
| RR/9/391 | Letter from Arthur Schuster, on a paper 'On the relation between the thickness and the surface tension of liquid films' by Arnold William Reinold and Arthur William Rucker to the Secretary of the Royal Society | 24 July 1886 |
| AP/80/5 | Unpublished paper, 'On black soap-films' by A W [Arnold William] Reinold and A W [Arthur William] Rücker | 1890 |
| NLB/6/858 | Copy letter from Herbert Rix, to Professor Arthur William Reinold | 25 July 1892 |
| RR/12/27 | Referee's report by John Henry Poynting, on a paper 'On the thickness and electrical resistance of thin liquid films' by Arnold William Reinold and Arthur William Rucker | 16 April 1893 |
| RR/12/28 | Referee's report by John William Strutt, 3rd Baron Rayleigh, on a paper 'On the thickness and electrical resistance of thin liquid films' by Arnold William Reinold and Arthur William Rucker | [1893] |