| RefNo | Title | Date |
| EC/1888/05 | Kopp, Hermann: certificate of election to the Royal Society | |
| MS/373/1/48 | Letter from Hermann Kopp, Heidelberg, to [Henry Enfield] Roscoe | 16 May 1884 |
| MS/373/1/87 | Testimonial by Hermann Kopp, Heidelberg, supporting Thomas Edward Thorpe | 14 June 1870 |
| MS/373/1/6 | Postcard from Hermann Kopp, Heidelberg, to Thomas Edward Thorpe, Yorkshire College of Science | 11 August 1876 |
| MS/373/1/103 | Testimonial by Hermann Kopp, Heidelberg, supporting Thomas Edward Thorpe | 16 April 1874 |
| NLB/4/710 | Copy letter from Herbert Rix, to Professor Hermann Kopp, Plockstrasse 79, Heidelberg | 2 October 1890 |
| RR/5/134 | Referee's report by Alexander William Williamson, on a paper 'Investigations of the specific heat of solid and liquid bodies' by Hermann Kopp | 3 November 1864 |
| MS/427/32 | Copy letter from Walter White, Assistant Secretary of the Royal Society; to Prof. [Henry Enfield] Roscoe | 19 April 1880 |
| NLB/8/742 | Copy letter from Herbert Rix, to Professor Thomas Edward Thorpe, Fellow of the Royal Society | 15 December 1893 |
| PT/60/16 | Paper, 'On the relation between boiling point and composition in organic compounds' by Hermann Kopp | [1860] |
| RR/4/151 | Referee's report by Thomas Graham, on a paper 'On the relation between boiling-point and composition organic compounds' by Hermann Kopp | 16 June 1860 |
| PT/72/2/1 | Manuscript, ['Investigations of the specific heat of solid bodies'] by [Hermann Kopp] | [1864] |
| PT/72/2 | Paper, ['Investigations of the specific heat of solid bodies'] by [Hermann Kopp] | [1864] |
| RR/5/133 | Referee's report by Thomas Graham, on a paper 'Investigations of the specific heat of solid and liquid bodies' by Hermann Kopp | 7 June 1864 |
| PT/72/2/2 | Plate, apparatus for determining specific heat by unknown artist | [1864] |
| MS/426/464 | Copy letter from C R [Charles Richard] Weld, the Assistant Secretary of the Royal Society; to Mr [Thomas] Graham | 20 April 1852 |
| RR/5/221 | Referee's report by William Allen Miller, on a paper 'Investigations of the specific heat of solid bodies' by Hermann Kopp | 16 November 1864 |
| MC/14/339 | Letter from Professor Hermann [Franz Moritz] Kopp, Heidelberg, to the Royal Society, London | 15 July 1888 |
| MC/14 | Volume 14 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1885-1888 |