| RefNo | Title | Date |
| MS/743/1/170 | Letter from William Ramsay, 19 Chester Terrace, Regent's Park, to Miss Gladstone | 25 February 1912 |
| MS/525/6/1/9 | Letter from William Ramsay, The Athenaeum, Pall Mall, to [C V] Boys | 21 October 1915 |
| CMB/36/8 | Copy, letter from Sir William Ramsay of the Chemical Sub-committee to [Dr Arthur Schuster], Secretary of the Royal Society | 22 December 1914 |
| NLB/40/759 | Copy letter from Robert William Frederick Harrison to Sir Joseph Larmor, Sec RS | 6 August 1909 |
| IM/003737 | Ramsay, Sir William | nd |
| IM/Maull/003736 | Ramsay, Sir William | nd |
| CMB/28 | Chemistry War Committee | 1914 to 1918 |
| MC/19/689 | Letter from William Ramsay, University College, London, Gower Street, to [Joseph] Larmor | 27 November 1904 |
| NLB/1/526 | Copy letter from Herbert Rix, to Professor [William] Ramsay | 19 July 1887 |
| NLB/6/15 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 10 February 1892 |
| NLB/5/196 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society, Belmont, Kilcreggan, Dunbartonshire | 11 April 1891 |
| NLB/5/1259 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 5 February 1892 |
| NLB/5/164 | Copy letter from Herbert Rix, to [John William Strutt] Lord Rayleigh, [Royal Society] | 6 April 1891 |
| NLB/6/1002 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 1 October 1892 |
| NLB/5/329 | Copy letter from Herbert Rix, to [John William Strutt] Lord Rayleigh, [Royal Society] | 15 May 1891 |
| NLB/5/333 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 20 May 1891 |
| NLB/51/24 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir William Ramsay KCB, FRS | 20 November 1914 |
| RR/13/134 | Referee's report by William Ramsay, on a paper 'On the relations between the viscosity (internal friction) of liquids and their chemical nature.—Part II' by Thomas Edward Thorpe and J W Rodger | July 1896 |
| NLB/24/455 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 22 May 1902 |
| NLB/8/359 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 9 October 1893 |
| NLB/10/704 | Copy letter from Herbert Rix, to Professor [William] Ramsay, Fellow of the Royal Society | 23 January 1895 |
| NLB/11/35 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 5 April 1895 |
| NLB/8/1008 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society, 12 Arundel Gardens, Notting Hill, W. | 9 February 1894 |
| NLB/10/682 | Copy letter from Michael Foster, to Professor Henry Edward Armstrong, President of the Chemical Society, Bonn, Germany | 19 January 1895 |
| NLB/10/735 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society, University College, Green Street, London, W.C. | 28 January 1895 |
| NLB/10/917 | Copy letter from Herbert Rix, to Professor Ramsay, Fellow of the Royal Society | 6 March 1895 |
| NLB/11/512 | Copy letter from Herbert Rix, to Messrs Harrison & Sons | 16 July 1895 |
| NLB/11/143 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 29 April 1895 |
| NLB/11/752 | Copy letter from Herbert Rix, to Professor Edwin Ray Lankester | 1 October 1895 |
| NLB/11/230 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 17 May 1895 |
| NLB/11/982 | Copy letter from Herbert Rix, to Mr Joseph Flach, 16 Water Lane, Great Tower Street, E.C. | 12 November 1895 |
| NLB/11/473 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 10 July 1895 |
| NLB/11/514 | Copy letter from Herbert Rix, to William Crookes, Fellow of the Royal Society | 16 July 1895 |
| NLB/11/618 | Copy letter from an unknown correspondent, to Messrs Collings and Company | 14 August 1895 |
| NLB/11/644 | Copy letter from Theodore E James, to Professor Edwin Ray Lankester, Fellow of the Royal Society | 23 August 1895 |
| NLB/23/2/6 | Copy letter from Sir Michael Foster, to Professor [William] Ramsay, Fellow of the Royal Society and Dr M W Travers, University College, W.C. | 23 January 1901 |
| NLB/11/943 | Copy letter from Lord Rayleigh [John William Strutt], to Professor William Ramsay, Fellow of the Royal Society | 7 November 1895 |
| NLB/11/944 | Copy letter from Lord Rayleigh [John William Strutt], to Horace Alfred Damer Seymour, Royal Mint | 7 November 1895 |
| NLB/13/52 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 2 June 1896 |
| NLB/12/559 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 13 March 1896 |
| NLB/12/241 | Copy letter from Herbert Rix, to Professor William Ramsey, Fellow of the Royal Society | 13 January 1896 |
| NLB/12/295 | Copy letter from Herbert Rix, to Professor Michael Foster, [Royal Society] | 24 January 1896 |
| NLB/13/466 | Copy letter from Robert William Frederick Harrison, to Elmer G Still, Livermore, Alameda Company, California, United States of America | 19 September 1896 |
| NLB/12/556 | Copy letter from Herbert Rix, to Messrs Harrison & Sons | 13 March 1896 |
| NLB/12/298 | Copy letter from Herbert Rix, to Professor Silvanus Phillips Thompson, Fellow of the Royal Society | 24 January 1896 |
| NLB/13/786 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, Fellow of the Royal Society | 25 November 1896 |
| NLB/13/813 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, [Fellow of the Royal Society] | 1 December 1896 |
| NLB/13/803 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, Fellow of the Royal Society | 27 November 1896 |
| NLB/12/621 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 24 March 1896 |
| NLB/14/431 | Copy letter from Arthur William Rucker, to Professor William Ramsay, Fellow of the Royal Society | 10 March 1897 |
| NLB/14/896 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 1 June 1897 |
| NLB/16/266 | Copy letter from Robert William Frederick Harrison, to Professor W Ramsay, Fellow of the Royal Society, 12 Arundel Gardens, Notting Hill, W. | 3 March 1898 |
| NLB/52/413 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor I. Gollanoz, Secretary of the British Academy | 1 December 1915 |
| NLB/15/45 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 11 June 1897 |
| RR/15/133 | Referee's report by William Ramsay, on a paper 'The ionisation of dilute solution at the freezing point' by William Cecil Dampier Whetham | February 1900 |
| NLB/15/44 | Copy letter from Robert William Frederick Harrison, to R Stewart Bain | 11 June 1897 |
| NLB/15/16 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 4 June 1897 |
| NLB/16/122 | Copy letter from Robert William Frederick Harrison, to Professor W Ramsay, Fellow of the Royal Society | 5 January 1898 |
| NLB/18/185 | Copy letter from Robert William Frederick Harrison, to Professor [W] Ramsay | 2 February 1899 |
| NLB/23/1/542 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 29 November 1901 |
| NLB/16/529 | Copy letter from Robert William Frederick Harrison, to Professor W Ramsay, Fellow of the Royal Society | 26 April 1898 |
| NLB/15/789 | Copy letters sent from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 10 December 1897 |
| NLB/15/696 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 19 November 1897 |
| NLB/16/87 | Copy letter from Robert William Frederick Harrison, to Professor W Ramsay, Fellow of the Royal Society | 28 January 1898 |
| NLB/17/599 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 23 November 1898 |
| NLB/17/662 | Copy letter from Robert William Frederick Harrison, to Professor Arthur William Rucker, [Fellow of the Royal Society] | 3 December 1898 |
| NLB/28/616 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 19 April 1904 |
| NLB/16/872 | Copy letter from Arthur William Rucker, to Professor W Ramsay, Fellow of the Royal Society | 24 June 1898 |
| NLB/17/695 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay | 8 December 1898 |
| NLB/17/790 | Copy letter from Arthur William Rucker, to Professor William Ramsay, [Fellow of the Royal Society] | 20 December 1898 |
| NLB/17/782 | Copy letter from Arthur William Rucker, to Richard Tetley Glazebrook, Fellow of the Royal Society | 19 December 1898 |
| NLB/18/325 | Copy letter from Robert William Frederick Harrison, to Professor W Ramsay, Fellow of the Royal Society | 22 February 1899 |
| NLB/18/337 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 24 February 1899 |
| NLB/19/769 | Copy letter from Robert William Frederick Harrison, to the Assistant Editor, 'The Electrician', 1 Salisbury Court, Fleet Street, E.C. | 14 December 1899 |
| NLB/21/347 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 2 November 1900 |
| NLB/20/709 | Copy letter from Robert William Frederick Harrison, to Dr Dukinfield Henry Scott, Fellow of the Royal Society | 22 June 1900 |
| NLB/21/632 | Copy letter from Arthur William Rucker, to Professor William Ramsay, Fellow of the Royal Society | 20 December 1900 |
| NLB/23/1/476 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 18 November 1901 |
| NLB/23/2/476 | Copy letter from Joseph Larmor, to Sir William Ramsay, Fellow of the Royal Society, and Frederick Soddy, [Fellow of the Royal Society] | 5 May 1904 |
| NLB/29/120 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 8 July 1904 |
| MC/20/299 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to [Robert William Frederick] Harrison | 3 April 1905 |
| NLB/30/407 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 20 March 1905 |
| NLB/45/495 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay KCB | March 1912 |
| NLB/30/508 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 6 April 1905 |
| NLB/28/853 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 6 June 1904 |
| NLB/34/44 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 20 November 1906 |
| NLB/32/552 | Copy letter from Joseph Larmor, to Sir William Ramsay, Fellow of the Royal Society | 2 April 1906 |
| NLB/33/789 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 3 November 1906 |
| NLB/33/679 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 19 October 1906 |
| NLB/34/79 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 24 November 1906 |
| NLB/36/94 | Copy letter from Theodore E James, to Sir William Ramsay, Fellow of the Royal Society, 19 Chester Terrace, Regent's Park | 10 August 1907 |
| NLB/35/150 | Copy letter from Archibald Geikie, to Sir William Ramsay, Fellow of the Royal Society | 26 April 1907 |
| NLB/39/97 | Copy letter from Joseph Larmor to Sir W [Willaim] Ramsay, Fellow of the Royal Society | 26 November 1908 |
| NLB/34/704 | Copy letter from Archibald Geikie, to Sir William Ramsay, Fellow of the Royal Society | 27 February 1907 |
| NLB/34/865 | Copy letter from Archibald Geikie, to [William] Ramsay, [Fellow of the Royal Society] | 20 March 1907 |
| NLB/37/50 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay KCB, FRS | 16 January 1908 |
| NLB/39/175 | Copy letter from Joseph Larmor to Sir William Ramsay | 5 December 1908 |
| NLB/36/751 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 11 December 1907 |
| NLB/39/193 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay, KCB, Fellow of the Royal Society | 8 December 1908 |
| NLB/39/304 | Copy letter from Robert William Frederick Harrison to Professor Joseph Larmor | 23 December 1908 |
| NLB/37/701 | Copy letter from Robert William Frederick Harrison to Professor J [Joseph] Larmor, Fellow of the Royal Society, Secretary of the Royal Society | 4 May 1908 |
| NLB/38/337 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 16 July 1908 |
| NLB/43/76 | Copy letter from Joseph Larmor, to Sir William Ramsay, Fellow of the Royal Society | 2 November 1910 |
| NLB/42/230 | Copy letter from Joseph Larmor to [William] Ramsay] | 28 April 1910 |
| NLB/40/155 | Copy letter from Robert William Frederick Harrison to Professor [Joseph] Larmor, Sec RS | 26 April 1909 |
| NLB/42/170 | Copy letter from Robert William Frederick Harrison to Herr Dr Rudorff | 18 April 1910 |
| NLB/44/263 | Copy letter from Robert William Frederick Harrison to Sir W [William] Ramsay KCB, FRS | 1 June 1911 |
| NLB/43/261 | Copy letter from Joseph Larmor, to Sir William Ramsay, Fellow of the Royal Society | 1 December 1910 |
| NLB/42/145 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay KCB, FRS | 13 April 1910 |
| NLB/42/153 | Copy letter from Robert William Frederick Harrison to Sir Frederick Treves GCVO, KCVO, &c | 14 April 1910 |
| NLB/42/277 | Copy letter from Robert William Frederick Harrison to Miss L F Homfray, 16 Church Row, Hampstead | 4 May 1910 |
| NLB/41/632 | Copy letter from Joseph Larmor, to Sir William Ramsay, Fellow of the Royal Society | 26 January 1910 |
| NLB/43/365 | Copy letter from Joseph Larmor, to William Ramsay, Fellow of the Royal Society | 16 December 1910 |
| NLB/43/290 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 5 December 1910 |
| NLB/45/378 | Copy letter from Robert William Frederick Harrison to Sir W [William] Ramsay KCB, FRS | 26 February 1912 |
| NLB/45/716 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay, KCB, FRS | 29 April 1912 |
| NLB/45/545 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay, KCB, FRS, 19 Chester Terrace, Regent's Park, NW | 26 March 1912 |
| NLB/45/405 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay KCB, FRS | 29 February 1912 |
| NLB/47/542 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay, KCB, FRS | 18 February 1913 |
| NLB/48/402 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 28 June 1913 |
| NLB/51/162 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir William Ramsay KCB, FRS | 23 December 1914 |
| NLB/51/752 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Cunningham McLennan FRS, c/o William Ramsay, Bowland, Stow, Midlothian | 17 June 1915 |
| NLB/51/3 | Copy letter from Arthur Schuster, Secretary of the Royal Society to Sir William Ramsay KCB, FRS | 19 November 1914 |
| MS/929/1/158 | Letter from William Ramsay, FRS, University College, Gower Street, London, to James Mackenzie Davidson | 16 November 1913 |
| NLB/53/203a | Copy letter from [Sir Joseph John] Thomson, President of the Royal Society and FRS; to Lady Ramsay | 25 May 1916 |
| RR/18/191 | Referee's report by William Augustus Tilden, on a paper 'The atomic weight of radium' by Robert Whytlaw-Gray and William Ramsay | 6 January 1912 |
| RR/9/390 | Referee's report by Alexander Crum Brown, on a paper 'On the vapour pressures of ether' by William Ramsay and Sydney Young | 4 December 1886 |
| RR/9/387 | Referee's report by George Carey Foster, on two papers 'On evaporation and dissociation. Part II - A study of the thermal properties of alcohol' and 'On evaporation and dissociation. Part I' by William Ramsay and Sydney Young | 29 December 1885 |
| RR/9/389 | Referee's report by James Dewar, on a paper 'On the vapour pressures of ether' by William Ramsay and Sydney Young | 14 August 1886 |
| RR/9/236 | Referee's report by Balfour Stewart, on a paper 'Influence of change of condition from the liquid to the solid state on vapour-pressure' by William Ramsay and Sydney Young | 24 June 1884 |
| NLB/53/526 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John] Norman Collie, FRS | 24 October 1916 |
| MS/929/1/161 | Letter from William Ramsay, FRS, Beechcroft, Hazlemere, Bucks, to James Mackenzie Davidson | 19 February 1915 |
| MS/929/1/159 | Postcard from William Ramsay, FRS, London, to James Mackenzie Davidson | 23 December 1913 |
| RR/11/80 | Referee's report by Arthur William Rucker on a paper 'An attempt to determine the adiabatic relations of ethyl oxide' by William Ramsay and E P Perman | 22 June 1891 |
| RR/9/181 | Referee's report by George Carey Foster, on a paper 'The influence of pressure on the temperature of volatilization of solids' by William Ramsay and Sydney Young | 24 August 1883 |
| RR/9/180 | Referee's report by Balfour Stewart, on a paper 'The influence of pressure on the temperature of volatilization of solids' by William Ramsay and Sydney Young | 12 July 1883 |
| RR/9/237 | Referee's report by George Carey Foster, on a paper 'Influence of change of condition from the liquid to the solid state on vapour-pressure' by William Ramsay and Sydney Young | 1 September 1884 |
| MS/929/2/6 | Copy Letter from James Mackenzie Davidson, 26 Park Crescent, to William [Ramsay], FRS | 29 October 1913 |
| RR/11/79 | Referee's report by George Carey Foster, on a paper 'An attempt to determine the adiabatic relations of ethyl oxide' by William Ramsay and E P Perman | 3 April 1891 |
| RR/11/199 | Referee's report by George Carey Foster, on a paper 'On some of the properties of water and of steam' by William Ramsay and Sydney Young | 9 January 1892 |
| AP/67/4/2 | Unpublished diagram, experimental apparatus by William Ramsay and E P [Edgar Philip] Perman | 1891 |
| MS/929/1/157 | Letter from William Ramsay, FRS, University College, Gower Street, London, to James Mackenzie Davidson | 7 February 1910 |
| RR/12/293 | Second referee's report by William Ramsay, on a paper 'On the ratio of the specific heats of some compound gases' by J W Capstick | nd [1895] |
| RR/13/233 | Referee's report by William Chandler Roberts-Austen, on a paper 'On the occlusion of hydrogen and oxygen by palladium' by Ludwig Mond, William Ramsay and John Shields | 8 January 1898 |
| RR/12/367 | Letter from William Chandler Roberts-Austen, to John William Strutt, 3rd Baron Rayleigh, regarding a paper 'On the occlusion of oxygen and hydrogen by platinum black. - Part I' by Ludwig Mond, William Ramsay and John Shields | 9 August 1895 |
| RR/13/98 | Referee's report by John William Strutt, Lord Rayleigh, on a paper 'An attempt to determine the adiabatic relations of ethyl oxide' by E P Perman, William Ramsay and J. Rose-Innes | 1896 |
| RR/12/366 | Referee's report by Harold Baily Dixon, on a paper 'On the occlusion of oxygen and hydrogen by platinum black. - Part I' by Ludwig Mond, William Ramsay and John Shields | 3 July 1895 |
| RR/12/291 | Referee's report by William Ramsay, on a paper 'On the ratio of the specific heats of some compound gases' by J W Capstick | nd [1895] |
| RR/13/99 | Second referee's report by Arthur William Rucker, on a paper 'An attempt to determine the adiabatic relations of ethyl oxide' by E P Perman, William Ramsay and J. Rose-Innes | 1896 |
| RR/15/19 | Referee's report by William Ramsay, on a paper 'Some new observations on the static diffusion of gases and liquids and their significance in certain natural processes occurring in plants' by Horace Tabberer Brown and F Escombe | June 1900 |
| RR/13/232 | Referee's report by Thomas Edward Thorpe, on a paper 'On the occlusion of hydrogen and oxygen by palladium' by Ludwig Mond, William Ramsay and John Shields | 14 December 1897 |
| RR/13/230 | Referee's report by William Chandler Roberts-Austen, on a paper 'On the occlusion of oxygen and hydrogen by platinum black' by Ludwig Mond, William Ramsay and John Shields | 27 July 1897 |
| RR/13/231 | Referee's report by Thomas Edward Thorpe, on a paper 'On the occlusion of oxygen and hydrogen by platinum black' by Ludwig Mond, William Ramsay and John Shields | 3 August 1897 |
| RR/10/208 | Referee's report by William Grylls Adams, on a paper 'On evaporation and dissociation.—Part VIII. A study of the thermal properties of propyl alcohol' by William Ramsay and Sydney Young | 17 October 1888 |
| RR/13/300 | Referee's report by William Ramsay, on a paper 'On a new method of determining the vapour pressures of solutions' by E B H Wade | 5 May 1897 |
| NLB/19/751 | Copy letter from Arthur William Rucker, Professor William Ramsay, [Fellow of the Royal Society] | 11 December 1899 |
| EC/1888/20 | Ramsay, Sir William: certificate of election to the Royal Society | |
| MC/18 | Volume 18 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1903 |
| NLB/6/1023 | Copy letter from Herbert Rix, to Professor William Ramsay, Fellow of the Royal Society | 4 October 1892 |
| NLB/12/536 | Copy letter from Herbert Rix, to the Secretary, Philosophical Society, 207 Bath Street, Glasgow | 9 March 1896 |
| NLB/14/401 | Copy letter from Robert William Frederick Harrison, to Professor Arthur William Rucker, Secretary, Royal Society | 5 March 1897 |
| RR/16/270 | Referee's report by William Ramsay, on a paper, 'The combination of hydrogen & oxygen in contact with hot surfaces' by William Arthur Bone and R V Wheeler | January 1906 |
| NLB/15/235 | Copy letter from Arthur William Rucker, to Richard Tetley Glazebrook, [Fellow of the Royal Society] | 21 July 1897 |
| NLB/15/615 | Copy letter from Arthur William Rucker, to Professor William Ramsay, [Fellow of the Royal Society] | 4 November 1897 |
| NLB/17/92 | Copy letter from Robert William Frederick Harrison, to Professor William Ramsay, Fellow of the Royal Society | 14 July 1898 |
| NLB/16/708 | Copy letter from Arthur William Rucker, to Professor W Ramsay, Fellow of the Royal Society | 24 May 1898 |
| NLB/19/772 | Copy letter from Arthur William Rucker, to Professor Dr Waldeyer, Secretary, Königlich Preussische Akademie der Wissenschaften , Berlin | 14 December 1899 |
| NLB/22/324 | Copy letter from Robert William Frederick Harrison, to Professor [William] Ramsay, Fellow of the Royal Society | 23 April 1901 |
| NLB/30/360 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 11 March 1905 |
| NLB/32/70 | Copy letter from Robert William Frederick Harrison, to Professor Hugh Longbourne Callendar, Fellow of the Royal Society, Chairman of the Physics and Chemistry Committee | 20 December 1905 |
| NLB/29/671 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 22 November 1904 |
| NLB/40/693 | Copy letter from Robert William Frederick Harrison to Sir Joseph Larmor, Secretary RS | 19 July 1909 |
| NLB/42/132 | Copy letter from Robert William Frederick Harrison to Professor G [George] D [Downing] Liveing FRS | 9 April 1910 |
| NLB/51/174 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir William Ramsay KCB, FRS | 4 January 1915 |
| MS/929/1/160 | Letter from William Ramsay, FRS, Beechcroft, Hazlemere, Bucks, to James Mackenzie Davidson | 17 February 1915 |
| RR/10/209 | Second referee's report by William Grylls Adams, on a paper 'On evaporation and dissociation.—Part VIII. A study of the thermal properties of propyl alcohol' by William Ramsay and Sydney Young | nd [1888] |
| RR/11/225 | Referee's report by William Ramsay, on a paper 'On the mechanical stretching of liquids: an experimental determination of the volume-extensibility of ethyl-alcohol' by Arthur Mason Worthington | 10 March 1892 |
| RR/13/96bis | Referee's report by Richard Tetley Glazebrook, on a paper 'An attempt to determine the adiabatic relations of ethyl oxide' by E P Perman, William Ramsay and J. Rose-Innes | 2 February 1897 |
| RR/10/77 | Second referee's report by Alexander William Williamson, on a paper 'On evaporation and dissociation. Part V. A study of the thermal properties of methyl-alcohol' by William Ramsay and Sydney Young | 5 May 1887 |
| RR/10/76 | Referee's report by George Francis Fitzgerald, on a paper 'On evaporation and dissociation. Part V. A study of the thermal properties of methyl-alcohol' by William Ramsay and Sydney Young | 26 March 1887 |
| NLB/39/176 | Copy letter from Robert William Frederick Harrison to Professor [Joseph] Larmor, Secretary of the Royal Society | 7 December 1908 |
| RR/9/388 | Referee's report by William Grylls Adams, on two papers 'On the vapour-densities of alcohol' and 'On the vapour pressures of ammonium chloride' by William Ramsay and Sydney Young | 20 February 1886 |
| RR/11/200 | Referee's report by Arthur William Rucker, on a paper 'On some of the properties of water and of steam' by William Ramsay and Sydney Young | 14 January 1892 |
| MC/20/298 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to [Robert William Frederick] Harrison | 17 March 1905 |
| PP/24/14 | Paper, 'The complexity and the dissociation of the molecules of liquids' by William Ramsay | 1894 |
| VF/32 | Portrait of Sir William Ramsay by Sir Leslie Ward | 02 December 1908 |
| MDA/C/12/2/16 | Circular letter from Frederick Thomas Trouton, Physical Department, University College, London, to members of the Physical and Chemical Commitee of the Royal Society | 20 December 1904 |
| RR/12/22 | Letter from William Ramsay, to John William Strutt, Lord Rayleigh, regarding a paper 'The variation of molecular surface-energy with temperature' by William Ramsay and John Shields | 3 June 1893 |
| RR/16/127 | Referee's report by William Ramsay, on paper 'The dependence of the Refractive Index of gases on temperature' by George Walker Walker | March 1903 |
| AP/67/4 | Unpublished paper, 'An attempt to determine the adiabatic relations of ethyl oxide. Part I: Gaseous ether' by W [William] Ramsay and E P [Edgar Philip] Perman | 1891 |
| RR/10/207 | Referee's report by George Carey Foster, on a paper 'On evaporation and dissociation.—Part VIII. A study of the thermal properties of propyl alcohol' by William Ramsay and Sydney Young | 7 August 1888 |
| PP/16/3/1 | Manuscript, 'Experiments on vapour-density' by Edgar Philip Perman | 1890 |
| AP/67/10 | Unpublished paper, 'On the constitution of the terpenes, camphors and camphor acids' by J [John] Norman Collie | 1891 |
| RR/10/357 | Referee's report by William Ramsay, on a paper 'On the specific heats of gases at constant volume.—Part I. Air, carbon dioxide, and hydrogen' by John Joly | nd [1890] |
| RR/11/153 | Referee's report by William Ramsay, on a paper 'Composition of haemocyanin' by A B Griffiths | 30 March 1892 |
| RR/12/21 | Referee's report by George Downing Liveing, on a paper 'The variation of molecular surface-energy with temperature' by William Ramsay and John Shields | 17 May 1893 |
| AP/71/9 | Unpublished paper, 'A possible explanation of the two-fold spectra of oxygen and nitrogen' by E C C [Edward Charles Cyril] Baly | 25 February 1895 |
| PP/10/2 | Paper, 'Preliminary note on the continuity of the liquid and gaseous states of matter' by William Ramsay and Sydney Young | 1886 |
| PP/10/28 | Paper, 'Clausius's formula for the change of state from liquid to gas applied to Messrs. Ramsay and Young's observations on alcohol' by George Francis Fitzgerald | 1887 |
| PP/10/8 | Paper, 'On the thermodynamic properties of substances whose intrinsic equation is a linear function of the pressure and temperature' by George Francis Fitzgerald | 1887 |
| PP/16/3 | Paper, 'Experiments on vapour-density' by Edgar Philip Perman | 1890 |
| AP/67/4/1 | Unpublished manuscript, 'An attempt to determine the adiabatic relations of ethyl oxide. Part I: Gaseous ether' by W [William] Ramsay and E P [Edgar Philip] Perman | 1891 |
| PP/17/21 | Paper, 'Some suggestions regarding solutions' by William Ramsay | 1891 |
| PP/24/2 | Paper, 'Researches on modern explosives. Preliminary communication' by William Macnab and Emanuel Joseph Ristori | 1894 |
| PP/24/15 | Paper, 'The molecular surface-energy of mixtures of non-associating liquids' by William Ramsay and Emily Aston | 1894 |
| RR/10/79 | Second letter from William Ramsay, to John William Strutt, 3rd Baron Rayleigh, regarding a paper 'On evaporation and dissociation. Part V. A study of the thermal properties of methyl-alcohol' by William Ramsay and Sydney Young | 23 May 1887 |
| RR/12/20 | Referee's report by Joseph John Thomson, on a paper 'The variation of molecular surface-energy with temperature' by William Ramsay and John Shields | 28 April 1893 |
| RR/15/107 | Referee's report by William Augustus Tilden, on a paper 'Argon and its companions' by William Ramsay and Morris William Travers | 29 November 1900 |
| RR/10/75 | Referee's report by Alexander William Williamson, on a paper 'On evaporation and dissociation. Part V. A study of the thermal properties of methyl-alcohol' by William Ramsay and Sydney Young | 25 March 1887 |
| RR/10/78 | Letter from William Ramsay, to John William Strutt, 3rd Baron Rayleigh, regarding a paper 'On evaporation and dissociation. Part V. A study of the thermal properties of methyl-alcohol' by William Ramsay and Sydney Young | 14 May 1887 |
| RR/10/80 | Referee's report by Edward Frankland, on a paper 'On evaporation and dissociation. Part V. A study of the thermal properties of methyl-alcohol' by William Ramsay and Sydney Young | 15 June 1887 |
| RR/12/368 | Referee's report by William Chandler Roberts-Austen, on a paper 'On the occlusion of oxygen and hydrogen by platinum black. - Part I' by Ludwig Mond, William Ramsay and John Shields | 9 August 1895 |
| RR/13/97 | Referee's report by Arthur William Rucker, on a paper 'An attempt to determine the adiabatic relations of ethyl oxide' by E P Perman, William Ramsay and J. Rose-Innes | 1897 |
| RR/15/108 | Referee's report by George Downing Liveing, on a paper 'Argon and its companions' by William Ramsay and Morris William Travers | 16 December 1900 |
| RR/12/395 | Referee's report by Thomas Edward Thorpe, on four papers 'Argon, a new constituent of the atmosphere' by John William Strutt, 3rd Baron Rayleigh and William Ramsay, 'The liquefaction and solidification of argon' by K Olszewski, 'On the spectra of argon' by William Crookes, 'On the spark spectrum of argon as it appears in the spark spectrum of air' by Walter Noel Hartley, and a letter from George Francis Fitzgerald to John William Strutt, 3rd Baron Rayleigh | 13 February 1895 |
| RR/12/396 | Referee's report by John Henry Poynting, on four papers 'Argon, a new constituent of the atmosphere' by John William Strutt, 3rd Baron Rayleigh and William Ramsay, 'The liquefaction and solidification of argon' by K Olszewski, 'On the spectra of argon' by William Crookes, 'On the spark spectrum of argon as it appears in the spark spectrum of air' by Walter Noel Hartley, and a letter from George Francis Fitzgerald to John William Strutt, Lord Rayleigh | 18 February 1895 |
| PP/24/13 | Paper, 'The molecular surface-energy of the esters, showing its variation with chemical constitution' by William Ramsay and Emily Aston | 1894 |
| MC/18/183 | Letter from Morris [William] Travers, University College, London, to Dr [Joseph] Larmor | 25 June 1903 |
| NLB/30/403 | Copy letter from Robert William Frederick Harrison, to Sir William Ramsay, Fellow of the Royal Society | 18 March 1905 |
| MC/20/295 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to [Robert William Frederick] Harrison | 1 February 1905 |
| MC/20/301 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to Sir William [Huggins] | 6 July 1095 |
| MC/20/297 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to [Robert William Frederick] Harrison | 10 March 1905 |
| MC/20/296 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to [Robert William Frederick] Harrison | 7 March 1905 |
| NLB/16/874 | Copy letter from Arthur William Rucker, to [Professor W] Ramsay | 24 June 1898 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/19/687 | Letter from William Ramsay, University College, London, Gower Street, to [Robert William Frederick] Harrison | 21 June 1904 |
| MC/19/688 | Letter from William Ramsay, University College, London, Gower Street, to [Joseph] Larmor | 25 November 1904 |
| MC/19/690 | Letter from William Ramsay, University College, London, Gower Street, to [Joseph] Larmor | 19 December 1904 |
| MC/17 | Volume 17 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1897-1899 |
| NLB/42/154 | Copy letter from Robert William Frederick Harrison to Sir William Ramsay KCB, FRS | 14 April 1910 |
| MC/20/300 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to [Robert William Frederick] Harrison | 2 June 1905 |
| MC/20/302 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to [Robert William Frederick] Harrison | 13 October 1905 |
| MC/20/303 | Letter from [William] Ramsay, Univeristy College, London, Gower Street, to [Robert William Frederick] Harrison | 5 December 1905 |