| RefNo | Title | Date |
| NLB/6/171 | Copy letter from Herbert Rix, to Professor James Thomson, Fellow of the Royal Society | 16 March 1892 |
| NLB/6/156 | Copy letter from Herbert Rix, to Professor James Thomson, Fellow of the Royal Society | 14 March 1892 |
| NLB/6/624 | Copy letter from Herbert Rix, to Lord Kelvin [William Thomson], Fellow of the Royal Society | 14 June 1892 |
| NLB/6/674 | Copy letter from Herbert Rix, to Mr Collings, 172 Strand | 24 June 1892 |
| NLB/6/973 | Copy letter from Herbert Rix, to James Thomson, 22 Grove Street, Newcastle on Tyne | 27 September 1892 |
| NLB/7/201 | Copy letter from Herbert Rix, to James Thomson, 22 Wentworth Place, Newcastle on Tyne | 20 December 1892 |
| NLB/7/912 | Copy letter from Herbert Rix, to James Thomson, 22 Wentworth Place, Newcastle on Tyne | 25 May 1893 |
| RR/8/172 | Referee's report by James Thomson, on a paper 'On the determination of the rate of vibration of tuning-forks' by Herbert McLeod and George Sydenham Clarke | 5 November 1879 |
| MC/11/262 | Letter from James Thomson, Oakfield House, University Avenue, Glasgow, to Walter White, [Assistant Secretary of the Royal Society] | 1 November 1878 |
| RR/10/60 | Referee's report by James Thomson, on a paper 'Note on some experiments on the viscosity of ice' by J F Main | 10 June 1887 |
| RR/9/348 | Referee's report by James Thomson, on a paper 'Notes upon the straining of ships caused by rolling' by Francis Elgar | 23 June 1886 |
| EC/1877/18 | Thomson, James: certificate of election to the Royal Society | |
| MC/9 | Volume 9 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1870-June 1873 |
| MC/10/368 | Letter from James Thomson, Ashfield House, University Avenue, Glasgow, to Professor [George Gabriel] Stokes, [Secretary of the Royal Society] | 13 March 1876 |
| MC/10 | Volume 10 of miscellaneous correspondence regarding business matters, sent to the Royal Society | July 1873-1876 |
| MC/11/83 | Letter from James Thomson, East Knowe, Brodick, Arran, to Professor [George Gabriel] Stokes, [Secretary of the Royal Society] | 19 June 1877 |
| MC/11 | Volume 11 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1877-1879 |
| AP/40/16 | Letter, regarding the physical properties of ice from William Thomson to [George Gabriel] Stokes | 21 January 1858 |
| AP/39/26 | Paper, 'On the plasticity of ice, as manifested in glaciers' by James Thomson | 30 March 1857 |
| AP/57/1/1 | Unpublished manuscript, 'On the origin and mechanism of production of the prismatic or columnar structure of basalt' by Robert Mallet | 1874 |
| PP/17/23/2 | Diagrams, experimental equipment and observations by James C McConnel | 1891 |
| PP/17/23 | Paper, 'On the plasticity of an ice crystal' by McConnel | 1891 |
| PP/17/23/1 | Manuscript, 'On the plasticity of an ice crystal' by James C McConnel | 1891 |
| PP/20/6/1 | Manuscript, 'On certain appearances of beams of light, seen as if emanating from candle or lamp flames' by James Thomson | 1892 |
| PP/20/6/2 | Diagram, 'On certain appearances of beams of light, seen as if emanating from candle or lamp flames' by James Thomson | 1892 |
| PP/20/6 | Paper, 'On certain appearances of beams of light, seen as if emanating from candle or lamp flames' by James Thomson | 1892 |
| PP/8/27 | Paper, 'On the working of the harmonic analyser at the meteorological office' by Robert Henry Scott and Richard H Curtis | 1886 |
| PP/8/27/1 | Manuscript, 'On the working of the harmonic analyser at the meteorological office' by Robert Henry Scott and Richard H Curtis | 1886 |
| AP/57/1 | Unpublished paper, 'On the origin and mechanism of production of the prismatic or columnar structure of basalt' by Robert Mallet | 1874 |