| Reference number | Title | Date |
| EC/1895/08 | Griffiths, Ernest Howard: certificate of election to the Royal Society | |
| IM/001796 | Griffiths, Ernest Howard | nd |
| NLB/43/548 | Copy letter from Robert William Frederick Harrison, to Dr Ernest Howard Griffiths, Fellow of the Royal Society | 8 February 1911 |
| NLB/4/432 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 12 Parkside, Cambridge | 28 May 1890 |
| NLB/7/728 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, Royal Hotel, Jersey | 14 April 1893 |
| NLB/7/689 | Copy letter from Herbert Rix, to Mr Wilson, Post Office Terrace, Cambridge | 11 April 1893 |
| NLB/4/1140 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 12 Parkside, Cambridge | 28 January 1891 |
| NLB/6/467 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 12 Park Side, Cambridge | 17 May 1892 |
| NLB/5/4 | Copy letter from an unknown correspondent, to Messrs West, Newman & Company, 54, Hatton Garden | 14 February 1891 |
| NLB/5/5 | Copy letter from an unknown correspondent, to Messrs West, Newman & Company | 16 February 1891 |
| NLB/5/6 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 2 Parkside, Cambridge | 16 February 1891 |
| NLB/7/909 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 12 Parkside, Cambridge | 25 May 1893 |
| NLB/7/499 | Copy letter from Herbert Rix, to Mr E Wilson, Post Office Terrace, Cambridge | 3 March 1893 |
| NLB/7/489 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 12 Park Side, Cambridge | 1 March 1893 |
| NLB/48/263 | Copy letter from Robert William Frederick Harrison, to Principal [Ernest Howard] Griffiths, Fellow of the Royal Society | 6 June 1913 |
| NLB/7/751 | Copy letter from Herbert Rix, to Messrs Harrison | 18 April 1893 |
| NLB/7/541 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 12 Park Side, Cambridge | 9 March 1893 |
| NLB/7/501 | Copy letter from Herbert Rix, to Mr Collings | 3 March 1893 |
| NLB/7/910 | Copy letter from Herbert Rix, to Mr E Wilson, Post Office Terrace, Cambridge | 25 May 1893 |
| NLB/7/916 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 22 Parkside, Cambridge | 26 May 1893 |
| NLB/7/917 | Copy letter from Herbert Rix, to Mr Wilson | 26 May 1893 |
| NLB/10/934 | Copy letter from Herbert Rix, to Mr E Wilson, Post Office Terrace, Cambridge | 11 March 1895 |
| NLB/10/1007 | Copy letter from Herbert Rix, to Ernest Henry Griffiths, Bree's Hotel, Jersey | 22 March 1895 |
| NLB/10/1023 | Copy letter from Herbert Rix, to Mr E Wilson, Post Office Terrace, Cambridge | 26 March 1895 |
| NLB/9/303 | Copy letter from Herbert Rix, to Ernest Howard Griffiths | 27 April 1894 |
| NLB/11/856 | Copy letter from Herbert Rix, to Ernest Howard Griffiths, 12 Parkside, Cambridge | 21 October 1895 |
| NLB/12/724 | Copy letter from Theodore E James, to Ernest Howard Griffiths, Fellow of the Royal Society | 20 April 1896 |
| NLB/14/70 | Copy letter from Robert William Frederick Harrison, to Ernest Howard Griffiths, Fellow of the Royal Society | 21 December 1896 |
| NLB/19/467 | Copy letter from Robert William Frederick Harrison, to Ernest Henry Griffiths, Fellow of the Royal Society | 10 October 1899 |
| NLB/14/746 | Copy letter from Robert William Frederick Harrison, to Ernest Howard Griffiths, Fellow of the Royal Society, 12 Parkside Cambridge | 8 May 1897 |
| NLB/26/420 | Copy letter from Theodore E James to, Professor Ernest Howard Griffiths, Fellow of the Royal Society | 16 March 1903 |
| NLB/16/539 | Copy letter from Robert William Frederick Harrison, to E H Griffiths, Fellow of the Royal Society | 25 April 1898 |
| NLB/17/294 | Copy letter from Robert William Frederick Harrison, to Messrs Robarts, Lubbock & Company | [4 October 1898] |
| NLB/17/318 | Copy letter from Robert William Frederick Harrison, to Ernest Howard Griffiths, Fellow of the Royal Society | 7 October 1898 |
| NLB/19/20 | Copy letter from Robert William Frederick Harrison, to Ernest Howard Griffiths, Fellow of the Royal Society | 2 June 1899 |
| NLB/19/185 | Copy letter from Robert William Frederick Harrison, to Ernest Howard Griffiths, Fellow of the Royal Society | 10 July 1899 |
| NLB/19/451 | Copy letter from an unknown correspondent, to Messrs Robarts, Lubbock & Company, 15 Lombard Street, E.C. | 6 October 1899 |
| NLB/23/1/832 | Copy letter from Joseph Larmor, to Principal Ernest Howard Griffiths, [Fellow of the Royal Society] | 30 January 1902 |
| NLB/23/1/618 | Copy letter from Robert William Frederick Harrison, to Principal Ernest Howard Griffiths, Fellow of the Royal Society | 16 December 1901 |
| NLB/23/1/634 | Copy letter from an unknown correspondent, to Ernest Howard Griffiths, Fellow of the Royal Society | [17 December 1901] |
| NLB/25/762 | Copy letter from Robert William Frederick Harrison, to Ernest Howard Griffiths, Fellow of the Royal Society, University College, Cardiff | 19 December 1902 |
| NLB/27/145 | Copy letter from Robert William Frederick Harrison, to Professor Ernest Howard Griffiths, Fellow of the Royal Society, University College, Cardiff | 10 July 1903 |
| NLB/30/3 | Copy letter from Joseph Larmor, to Dr Ernest Howard Griffiths, [Fellow of the Royal Society] | 15 January 1905 |
| NLB/33/765 | Copy letter from Robert William Frederick Harrison, to Professor Ernest Howard Griffiths, Fellow of the Royal Society | 31 October 1906 |
| NLB/29/423 | Copy letter from Robert William Frederick Harrison, to Professor [Ernest Howard] Griffiths, Fellow of the Royal Society | 7 October 1904 |
| NLB/31/509 | Copy letter from Robert William Frederick Harrison, to Dr Ernest Howard Griffiths, Fellow of the Royal Society | 2 October 1905 |
| MC/22/95 | Letter from Ernest Howard Griffiths, University College, Cardiff, to [Robert William Frederick] Harrison | 5 December 1907 |
| NLB/36/541 | Copy letter from Robert William Frederick Harrison, to Professor Ernest Howard Griffiths, Fellow of the Royal Society | 12 November 1907 |
| NLB/34/776 | Copy letter from Robert William Frederick Harrison, to Principal [Ernest Howard] Griffiths, Fellow of the Royal Society, University College, Cardiff | 8 March 1907 |
| NLB/36/486 | Copy letter from Robert William Frederick Harrison, to Professor Joseph Larmor, Secretary, Royal Society | 4 November 1907 |
| NLB/36/702 | Copy letter from Robert William Frederick Harrison, to Professor Ernest Howard Griffiths, Fellow of the Royal Society | 3 December 1907 |
| NLB/41/169 | Copy letter from Robert William Frederick Harrison, to Dr [Ernest Howard] Griffiths, Fellow of the Royal Society | 27 October 1909 |
| NLB/39/385 | Copy letter from Robert William Frederick Harrison to Professor E [Ernest] H [Howard] Griffiths, Fellow of the Royal Society | 13 January 1909 |
| NLB/39/794 | Copy letter from Robert William Frederick Harrison to Professor E [Ernest] H [Howard] Griffiths, Fellow of the Royal Society | 16 March 1909 |
| NLB/39/807 | Copy letter from Robert William Frederick Harrison to Professor E [Ernest] H [Howard] Griffiths, Fellow of the Royal Society, Principal of University College, Cardiff | 19 March 1909 |
| NLB/39/772 | Copy letter from Robert William Frederick Harrison to Professor E [Ernest] H [Howard] Griffiths, Fellow of the Royal Society | 9 March 1909 |
| NLB/41/583 | Copy letter from Robert William Frederick Harrison, to Professor Ernest Howard Griffiths, Fellow of the Royal Society | 17 January 1910 |
| NLB/41/310 | Copy letter from Robert William Frederick Harrison, to Professor Ernest Howard Griffiths, Fellow of the Royal Society | 18 November 1909 |
| NLB/42/366 | Copy letter from Robert William Frederick Harrison to Professor E [Ernest] H [Howard] Griffiths FRS | 28 May 1910 |
| NLB/41/826 | Copy letter from Robert William Frederick Harrison, to Principal Ernest Howard Griffiths, Fellow of the Royal Society | 3 March 1910 |
| NLB/44/245 | Copy letter from Robert William Frederick Harrison to Dr E [Ernest] H [Howard] Griffiths FRS | 30 May 1911 |
| NLB/43/498 | Copy letter from Joseph Larmor, to Professor Ernest Howard Griffiths, Fellow of the Royal Society | 28 January 1911 |
| NLB/44/800 | Copy letter from Robert William Frederick Harrison to Dr E [Ernest] H [Howard] Griffiths FRS | 14 November 1911 |
| NLB/45/51 | Copy letter from Joseph Larmor to [Ernest Howard] Griffiths | 12 December 1911 |
| NLB/45/16 | Copy letter from Robert William Frederick Harrison to Principal E [Ernest] H [Howard] Griffiths FRS | 6 December 1911 |
| NLB/45/283 | Copy letter from Joseph Larmor to Professor E [Ernest] H [Howard] Griffiths FRS | 31 January 1912 |
| NLB/45/244 | Copy letter from Joseph Larmor to Principal [Ernest Howard] Griffiths | 25 January 1912 |
| NLB/45/298 | Copy letter from Robert William Frederick Harrison to Professor [Ernest Howard] Griffiths FRS | 7 February 1912 |
| NLB/46/416 | Copy letter from Robert William Frederick Harrison, to Dr [Aubrey] Strahan, Fellow of the Royal Society, The Tyndall Mining Bequest Committee | 27 July 1912 |
| NLB/48/188 | Copy letter from Robert William Frederick Harrison, to Dr [Ernest Howard] Griffiths, Fellow of the Royal Society | 29 May 1913 |
| NLB/51/797 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Prof Ernest Howard Griffiths FRS | 1 July 1915 |
| NLB/51/825 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor Ernest Howard Griffiths FRS | 7 July 1915 |
| MS/928/6/2/7 | Letter from Ernest Howard Griffiths, 5 Selwyn Gardens, Cambridge, to Charles Vernon Boys | 4 January 1920 |
| NLB/53/562 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Ernest Howard] Griffiths, FRS | 31 October 1916 |
| RR/20/56 | Referee's report by John Allen Harker, on a paper 'The capacity for heat of metals at low temperatures' by Ernest Howard Griffiths | April 1913 |
| NLB/54/730 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Ernest Howard] Griffiths, FRS | 24 August 1917 |
| RR/28/53 | Referee's report by Ernest Howard Griffiths, on a paper 'The determination of the factor of the kata-thermometer' by T C Angus | [August 1923] |
| NLB/56/92 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Edward Howard] Griffiths, FRS | 18 November 1918 |
| NLB/55/186 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Ernest Howard] Griffiths, FRS | 08 January 1918 |
| NLB/60/593 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Ernest Howard] Griffiths, FRS | 28 February 1921 |
| RR/10/350 | Detailed referee's report by Joseph David Everett, on a paper 'On the determination of some boiling and freezing points by means of the platinum thermometer' by Ernest Howard Griffiths | [1890] |
| RR/12/322 | Referee's report by Arthur Schuster, on a paper 'The latent heat of evaporation of water' by Ernest Howard Griffiths | nd [1895] |
| RR/17/351 | Referee's report by Ernest Howard Griffiths, on a paper 'The specific heats of air and carbon dioxide at atmospheric pressure by the continuous electric method at 20 degrees celsius and 100 degrees celsius' by W F G Swann | 19 October 1908 |
| RR/10/349 | Referee's report by Joseph David Everett, on a paper 'On the determination of some boiling and freezing points by means of the platinum thermometer' by Ernest Howard Griffiths | 18 August 1890 |
| NLB/60/554 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Ernest Howard] Griffiths, FRS | 23 February 1921 |
| NLB/60/611 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [Ernest Howard] Griffiths, FRS | 3 March 1921 |
| NLB/60/502 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [Ernest Howard] Griffiths, FRS | 16 February 1921 |
| RR/10/348 | Referee's report by George Carey Foster, on a paper 'On the determination of some boiling and freezing points by means of the platinum thermometer' by Ernest Howard Griffiths | 1 August 1890 |
| NLB/60/779 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr. [Ernest Howard] Griffiths, FRS | 5 April 1921 |
| RR/23/58 | Referee's report by Ernest Howard Griffiths, on a paper 'The use of highly attenuated wires for platinum thermometers' by [John Job] Manley | January 1917 |
| NLB/57/679 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr EH [Ernest Howard] Griffiths, FRS | 12 January 1920 |
| NLB/61/722 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [Ernest Howard] Griffiths, FRS | 17 October 1921 |
| NLB/57/593 | Copy letter from Sir James Hopwood Jeans, Secretary of the Royal Society; to the Director [Sir Joseph Ernest Petavel, FRS, KBE], the National Physical Laboratory | 12 December 1919 |
| NLB/65/59 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Ernest Howard] Griffiths, FRS | 20 July 1923 |
| RR/21/83 | Referee's report by John Allen Harker, on a paper 'The capacity for heat of metals at low temperatures' by Ernest Howard Griffiths and Ezer Griffiths | [June 1914] |
| IM/Maull/001795 | Griffiths, Ernest Howard | nd |
| NLB/10/981 | Copy letter from Herbert Rix, to Ernest Howard Griffiths | 18 March 1894 |
| RR/16/188 | Referee's report by Ernest Howard Griffiths, on a paper 'The high temperature standards of the National Physical Laboratory. An account of a comparison of Platinum Thermometers and Thermo-junctions with the Gas-thermometer' by John Allen Harker | February 1904 |
| NLB/20/334 | Copy letter from Arthur William Rucker, to Professor George Carey Foster, Fellow of the Royal Society | 26 March 1900 |
| NLB/36/626 | Copy letter from Robert William Frederick Harrison, to Professor Ernest Howard Griffiths, Fellow of the Royal Society | 21 November 1907 |
| NLB/60/621 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [Ernest Howard] Griffiths, FRS | 3 March 1921 |
| RR/10/330 | Referee's report by Robert Bellamy Clifton, on a paper 'On the determination of the boiling-point of sulphur, and on a method of standardising platinum resistance thermometers by reference to it.—Experiments made at the Cavendish laboratory, Cambridge' by Hugh Longbourne Callendar and Ernest Howard Griffiths | 20 January 1891 |
| EC/1895/09 | Griffiths, Ernest Howard: certificate of election to the Royal Society | |
| RR/15/163 | Referee's report by Ernest Howard Griffiths, on a paper 'Continuous electrical calorimetry' by Hugh Longbourne Callendar | 4 January 1902 |
| NLB/51/227 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Dr Ernest Howard Griffiths FRS | 16 January 1915 |
| RR/12/321 | Referee's report by George Carey Foster, on a paper 'The latent heat of evaporation of water' by Ernest Howard Griffiths | 21 February 1895 |
| 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/14/85 | Referee's report by Ernest Howard Griffiths, on a paper 'On the heat dissipated by a platinum surface at high temperatures' by Joseph Ernest Petavel | nd [June 1898] |
| RR/14/185 | Referee's report by Ernest Howard Griffiths, on a paper 'Gold-aluminium alloys' by Charles Thomas Heycock and Francis Henry Neville | nd [November 1899] |
| RR/16/106 | Referee's report by Ernest Howard Griffiths, on a paper 'The determination of specific heats, especially at low temperatures' by H E Schmitz | 20 April 1903 |
| RR/13/35 | Referee's report by Ernest Howard Griffiths, on a paper 'On the determination of freezing points' by John Allen Harker | July 1896 |
| RR/13/151 | Referee's report by Ernest Howard Griffiths, on a paper 'A new method of determining freezing points' by Meyer Wildermann | 1896 |
| RR/21/84 | Referee's report by Charles Vernon Boys, on a paper 'The capacity for heat of metals at low temperatures' by Ernest Howard Griffiths and Ezer Griffiths | [1914] |
| RR/11/261 | Referee's report by William Thomson, Lord Kelvin, on a paper 'The value of the mechanical equivalent of heat, deduced from some experiments performed with the view of establishing the relation between the electrical and mechanical units; together with an investigation into the capacity for heat of water at different temperatures' by Ernest Howard Griffiths | 31 January 1893 |
| RR/15/248 | Referee's report by Ernest Howard Griffiths, on a paper 'A new manometer, and on the law of pressure of gases between 1.5 and 0.01 millimetres of mercury' by John William Strutt, Lord Rayleigh | February 1901 |
| RR/15/396 | Referee's report by Ernest Howard Griffiths, on a paper 'The density and coefficient of cubical expansion of ice' by J H Vincent | February 1902 |
| RR/10/329 | Referee's report by George Carey Foster, on a paper 'On the determination of the boiling-point of sulphur, and on a method of standardising platinum resistance thermometers by reference to it.—Experiments made at the Cavendish laboratory, Cambridge' by Hugh Longbourne Callendar and Ernest Howard Griffiths | 5 January 1891 |
| RR/14/177 | Referee's report by Ernest Howard Griffiths, on a paper 'A comparison of platinum and gas thermometers, including a determination of the boiling-point of sulphur on the nitrogen scale. An account of experiments made in the laboratory of the Bureau International des Poids et Mesures Sèvres' by John Allen Harker and Pierre Chappuis | nd [July 1899] |
| RR/15/7 | Referee's report by Ernest Howard Griffiths, on a paper 'The capacity for heat of water between the freezing & boiling points' by Howard Turner Barnes | July 1900 |
| RR/26/61 | Referee's report by Ernest Howard Griffiths, on a paper 'The kata-thermometer as a measure of ventilation' by Leonard Erskine Hill, H M Vernon and D Hargood-Ash | [October 1921] |
| PP/23/2 | Paper, 'Appendix to a communication entitled "The mechanical equivalent of heat"' by Ernest Howard Griffiths | 1893 |
| MC/15/130 | Letter from [Ernest Howard] Griffiths, 12 Parkside, Cambridge, to Lord Rayleigh | 17 January 1891 |
| MC/15/264 | Letter from [Ernest Howard] Griffiths, 12 Park Side, Cambridge, to the Treasurer of the Royal Society | 4 April 1892 |
| MC/15/266 | Letter from [Ernest Howard] Griffiths, to [Herbert] Rix | 7 April 1892 |
| MC/15 | Volume 15 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1889-1892 |
| MC/28/131 | Letter from [John Allen] Harker, Meteorological Office Observatories, The Observatory, Eskadalemuir, Dumfries-Shire, to Mr [Robert] Harrison | 24 April 1913 |
| MC/28/118 | Letter from [Ernest Howard] Griffiths, University College of South Wales, Cathays Park, Cardiff, to Mr [Robert] Harrison, [Royal Society] | 14 July 1913 |
| MC/30/79 | Letter from [Ernest Howard] Griffiths, Principal, University College, Cardiff, to Mr [Robert] Harrison, [Royal Society] | 6 July 1915 |
| MC/30/78 | Letter from [Ernest Howard] Griffiths, Principal, University College, Cardiff, to Mr [Robert] Harrison, [Royal Society] | 14 January 1915 |
| MC/22/94 | Letter from Ernest Howard Griffiths, University College, Cardiff, to [Robert William Frederick] Harrison | 5 November 1907 |
| NLB/36/512 | Copy letter from Robert William Frederick Harrison, to Professor Ernest Howard Griffiths, Fellow of the Royal Society | 7 November 1907 |
| MC/32/119 | Letter from [Ernest Howard] Griffiths, Principal, University College, Cardiff, to the Librarian, Royal Society, Burlington House | 19 December 1917 |
| MC/22 | Volume 22 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1907 |
| MC/33/77 | Letter from [Ernest Howard] Griffiths, Univeristy College, Cardiff, to Mr [Robert] Harrison, Burlington House | 31 December 1918 |