| RefNo | Title | Date |
| EC/1831/18 | Harris, Sir William Snow: certificate of election to the Royal Society | |
| MS/710/49 | Letter from William Snow Harris, Probus, to Robert Were Fox, Falmouth | 14 October 1837 |
| DM/4/118 | Letter from WS Harris, Plymouth, to the President and Council of the Royal Society | 2 May 1823 |
| IM/001962 | Harris, Sir William Snow | nd |
| IM/001963 | Harris, Sir William Snow | 2002 |
| RR/5/100 | Telegram from William Thomson, Lord Kelvin, on a paper 'Further inquiries concerning the laws and operation of electrical force' by William Snow Harris to George Gabriel Stokes | 22 December 1864 |
| AP/11/9/3 | Unpublished diagram, magnetic balance and sets of magnets by [William Snow Harris?] | 29 May 1825 |
| AP/33/15/2 | Unpublished figures, experimental apparatus by William Snow Harris | 1851 |
| RR/1/92 | Referee's report by Peter Barlow, on a paper 'On some elementary laws of electricity' by William Snow Harris | [1834] |
| RR/3/130 | Referee's report by Charles Wheatstone, on a paper 'On quantitative measurement in statical electricity, and on some new phenomena of electrical force' by William Snow Harris | 1 September 1856 |
| RR/1/93 | Referee's report by William Thomas Brande, on a paper 'On some elementary laws of electricity' by William Snow Harris | 4 June 1834 |
| RR/1/268 | Referee's report by William Snow Harris, on a paper 'Barometrical observations, showing the effect of the direction of the wind on the difference between distant barometers' by Lieutenant Colonel Philip James Yorke | [1837] |
| MM/16/124 | Letter from WS Harris, Plymouth, to Sir John Herschel | 26 November 1851 |
| MM/16/125 | 'Abstract of papers by the Hon H Cavendish', by WS Harris | 1851 |
| PT/19/8i/5 | Plate, diagram of experiment with iron cylinders by William Snow Harris | 28 April 1831 |
| PT/19/8i/4 | Plate, mass of iron placed between magnet and suspended iron by William Snow Harris | 28 April 1831 |
| PT/19/8i/6 | Plate, arrangement of magnet, iron mass, and third substance by William Snow Harris | 28 April 1831 |
| PT/19/8i | Paper, 'On the power of masses of iron to controul [sic] the attractive force of a magnet' by W [William] Snow Harris | 28 April 1831 |
| PT/19/8i/1 | Manuscript, 'On the power of masses of iron to controul [sic] the attractive force of a magnet' by W [William] Snow Harris | 28 April 1831 |
| PT/19/8i/2 | Plate, arrangement of magnets and suspended iron by William Snow Harris | 28 April 1831 |
| PT/19/8i/3 | Plate, mass of iron placed below magnet by William Snow Harris | 28 April 1831 |
| PT/26/9 | Paper, 'On the specific inductive capacities of certain electrical substances' by W [William] Snow Harris | 1 May 1842 |
| MC/2 | Volume 2 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1832-1838 |
| MC/2/131 | Letter from James Hudson, [Assistant Secretary of the Royal Society], to the Royal Society | 2 July 1834 |
| PT/19/8 | Paper, 'On the influence of screens in arresting the process of magnetic action' by Mr William Snow Harris | 3 April 1831 |
| PT/73/13/1 | Diagrams, apparatus for measuring heat of metallic substances in air by [William Snow Harris?] | [1826] |
| PT/73/14/1 | Diagrams, mechanical arrangements for observing magnetism by unknown artist | [1830] |
| PT/73/14/2 | Diagrams, mechanical arrangements for observing magnetism by unknown artist | [1830] |
| MC/5/251 | Letter from W [William] Snow Harris, Athenaeum, to C R [Charles Richard] Weld, [Assistant Secretary of the Royal Society] | 20 June 1856 |
| MC/6 | Volume 6 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1859-1863 |
| AP/11/9/2 | Unpublished diagram, magnetic balance and components by [William Snow Harris?] | 29 May 1825 |
| AP/11/9/1 | Unpublished manuscript, 'On the construction and use of a magnetic balance' by William Snow Harris | 29 May 1825 |
| RR/1/158 | Referee's report by William Snow Harris, on an unnamed paper about thunder storms by Edward Lowe | 7 August 1850 |
| MC/6/314 | Letter from W [William] Snow Harris, 6 Windsor Villas, Plymouth, to [Walter] White, [Assistant Secretary of the Royal Society] | 29 March 1863 |
| MC/7/17 | Letter from W [William] Snow Harris, 6 Windsor Villas, Plymouth, to Walter White [Assistant Secretary of the Royal Society] | 7 February 1864 |
| AP/11/9 | Unpublished paper, 'On the construction and use of a magnetic balance' by William Snow Harris | 29 May 1825 |
| MC/7 | Volume 7 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1864-1866 |
| MC/8/57 | Letter from C [Charles] Tomlinson, King's College, to Walter White, [Assistant Secretary of the Royal Society] | 15 June 1867 |
| MC/8/59 | Letter from C [Charles] Tomlinson, King's College, to Professor [William Allen] Miller, Treasurer of the Royal Society | 18 June 1867 |
| RR/5/96 | Referee's report by William Thomson, Lord Kelvin, on a paper 'On some new phenomena of residuary charge, and the law of exploding distance of electrical accumulation on coated glass' by William Snow Harris | 25 October 1861 |
| RR/2/90 | Referee's report by Humphrey Lloyd, on a paper 'On induced and other magnetic forces' by William Snow Harris | 1 October 1851 |
| AP/17/7 | Unpublished paper, 'Remarks on Mr [William] Snow Harris's communication "On the influence of the sun's rays on the magnetic needle"' by S H [Samuel Hunter] Christie | 26 November 1832 |
| AP/17/6 | Unpublished letter, 'On the influence of the sun's rays on the magnetic needle' from William Snow Harris to Samuel Hunter Christie | 16 October 1832 |
| RR/1/195 | Referee's report by William Snow Harris, on a paper 'Second series of approximate deductions made from about 50,000 observations taken during the years 1836, 1837, and 1838, at the P. Louis Observatory, Mauritius, four times each day; namely, at 8 a.m., at noon, and at 4 and 8 p.m' by J A [John Augustus] Lloyd | 26 June 1840 |
| RR/2/89 | Referee's report by Michael Faraday, on a paper 'On induced and other magnetic forces' by William Snow Harris | 19 August 1851 |
| RR/2/93 | Referee's explanatory note by William Thomson, Lord Kelvin, on a paper 'On induced and other magnetic forces' by William Snow Harris | 6 February 1852 |
| RR/2/92 | Referee's report by William Thomson, Lord Kelvin, on a paper 'On induced and other magnetic forces' by William Snow Harris | 6 February 1852 |
| AP/45/6 | Unpublished paper, 'Further enquiries concerning, the laws, and the operation of electrical force' by William Snow Harris | 1864 |
| AP/45/6/2 | Unpublished figures, experimental apparatus by William Snow Harris | 1864 |
| AP/45/6/1 | Unpublished manuscript, 'Further enquiries concerning, the laws, and the operation of electrical force' by William Snow Harris | 1864 |
| MC/8 | Volume 8 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1867-1869 |
| RR/5/97 | Letter from William Thomson, 1st Baron Kelvin, to George Gabriel Stokes, regarding a paper 'On some new phenomena of residuary charge, and the law of exploding distance of electrical accumulation on coated glass' by William Snow Harris | 29 October 1861 |
| RR/2/91 | Response by Michael Faraday to referee's report by Humphrey Lloyd, on a paper 'On induced and other magnetic forces' by William Snow Harris | 13 January 1852 |
| RR/5/95 | Referee's report by John Tyndall, on a paper 'On some new phenomena of residuary charge, and the law of exploding distance of electrical accumulation on coated glass' by William Snow Harris | 24 October 1861 |
| RR/5/99 | Referee's report by John Tyndall, on a paper 'Further inquiries concerning the laws and operation of electrical force' by William Snow Harris | 21 November 1864 |
| RR/5/101 | Referee's report by William Thomson, Lord Kelvin, on a paper 'Further inquiries concerning the laws and operation of electrical force' by William Snow Harris | 22 December 1864 |
| AP/33/15 | Unpublished paper, 'On induced and other magnetic forces' by William Snow Harris | 24 April 1851 |
| AP/33/15/1 | Unpublished manuscript, 'On induced and other magnetic forces' by William Snow Harris | 24 April 1851 |
| MC/5 | Volume 5 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1851-1858 |
| HS/10/163 | Letter, from William Snow Harris to Sir John Herschel, dated at Plymouth | 30 October 1851 |