| RefNo | Title | Date |
| EC/1878/17 | Sprengel, Hermann Johann Phillipp: certificate of election to the Royal Society | |
| MM/16/6 | Statement by Dr Hermann Sprengel on "the discovery of the explosibility of wet guncotton through cumulative detonation" | 15 January 1892 |
| MM/16/5 | Letter from Dr Hermann Sprengel to the Royal Society | 15 June 1892 |
| MM/16/9 | Modification of a statement by Dr Hermann Sprengel on "the discovery of the explosibility of wet guncotton through cumulative detonation" | 16 November 1892 |
| MM/16/13 | Letter from Dr Hermann Sprengel to the President and Council of the Royal Society | 20 February 1893 |
| MM/16/1 | Letter from Dr Hermann Sprengel to Sir Frederick Abel | 25 November 1891 |
| MM/16/15 | Letter from Dr Hermann Sprengel to the President and Council of the Royal Society | 17 May 1893 |
| MM/16/16 | Report by GC Foster on a letter by Dr Hermann Sprengel to the Royal Society, 17 May 1893 | 14 June 1893 |
| MM/16/14 | Letter from GC Foster to Lord Rayleigh | 13 March 1893 |
| MM/16/3 | Letter from GC Foster to Lord Rayleigh | 12 April 1892 |
| MM/16/2 | Letter from Hugo Miller to Lord Rayleigh | 30 March 1892 |
| IM/Maull/004353 | Sprengel, Hermann Johann Phillipp | nd |
| NLB/6/499 | Copy letter from Herbert Rix, to Lord Rayleigh [John William Strutt] | 26 May 1892 |
| NLB/6/654 | Copy letter from Herbert Rix, to Professor George Carey Foster, Fellow of the Royal Society | 22 June 1892 |
| NLB/7/69 | Copy letter from Herbert Rix, to Lord Rayleigh [John William Strutt] | 21 November 1892 |
| NLB/7/67 | Statement as to the explosibility of wet guncotton through cumulative detonation by Hermann Johann Phillipp Sprengel | 16 November 1892 |
| NLB/7/332 | Memoranda with reference to a statement submitted to the Council of the Royal Society by Dr Hermann Johann Phillipp Sprengel, from Frederick Augustus Abel | 13 December 1892 |
| NLB/7/460 | Copy letter from Herbert Rix, to Lord Rayleigh [John William Strutt] | 22 February 1893 |
| NLB/7/506 | Copy letter from Herbert Rix, to Professor George Carey Foster, Fellow of the Royal Society | 3 March 1893 |
| NLB/7/998 | Copy letter from Herbert Rix, to Professor George Carey Foster, Fellow of the Royal Society | 13 June 1893 |
| NLB/22/541 | Copy letter from Robert William Frederick Harrison, to Professor [Herman] Sprengel, Fellow of the Royal Society | 31 May 1901 |
| NLB/32/170 | Copy letter from Robert William Frederick Harrison, to [Messrs Harrison & Sons] | 19 January 1906 |
| MM/16/7 | Report by GC Forster on a statement by Dr Hermann Sprengel on "the discovery of the explosibility of wet guncotton through cumulative detonation" | 19 September 1892 |
| MM/16/11 | Letter from Sir Frederick Abel to Lord Rayleigh | 13 December 1892 |
| MM/16/10 | Letter from Sir Frederick Abel to Lord Rayleigh | 23 November 1892 |
| MM/16/4 | Letter from Dr Hermann Sprengel to Lord Rayleigh | 3 June 1892 |
| MM/16/12 | Letter from GC Foster to Lord Rayleigh | 24 December 1892 |
| MM/16/8 | Letter from Dr Hermann Sprengel to Lord Rayleigh | 16 November 1892 |
| NLB/6/532 | Copy letter from Lord Rayleigh [John William Strutt], to Dr Hermann Johann Phillipp Sprengel, Fellow of the Royal Society, Terling Place Witham, Essex | 29 May 1892 |
| NLB/6/925 | Copy letter from Herbert Rix, to Professor George Carey Foster | 19 September 1892 |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |