Reference number | Title | Date |
EC/1910/09 | Harker, John Allen: certificate of election to the Royal Society | |
MC/19/391 | Letter from [John Allen] Harker, The National Physical Laboratory, Bushy House, Teddington, Middlesex, to [Joseph] Larmor | 11 June 1904 |
NLB/14/298 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, 22 Mount Ararat Road, Richmond, Surrey | 12 February 1897 |
NLB/14/830 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, [Fellow of the Royal Society], 22 Mount Ararat Road, Richmond, Surrey | 26 May 1897 |
NLB/14/861 | Copy letter from Robert William Frederick Harrison, Dr John Allen Harker, the Kew Observatory, Richmond, Surrey | 28 May 1897 |
RR/16/189 | Referee's report by Hugh Longbourne Callendar, 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 Dr John Allen Harker | February 1904 |
NLB/19/29 | Copy letter from Robert William Frederick Harrison, to Dr Charles Chree, Fellow of the Royal Society | 5 June 1899 |
NLB/19/283 | Copy letter from Arthur William Rucker, to Dr John Allen Harker, [Fellow of the Royal Society] and Dr P Chappuis | 26 July 1899 |
NLB/19/220 | Copy letter from Robert William Frederick Harrison, to Dr Charles Chree, Fellow of the Royal Society | 14 July 1899 |
NLB/19/252 | Copy letter from Robert William Harrison, to Professor George Carey Foster, Fellow of the Royal Society, Chairman of the Physics and Chemistry Committee | 19 July 1899 |
NLB/19/686 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, [Fellow of the Royal Society] | 23 November 1899 |
NLB/19/716 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, [Fellow of the Royal Society] | 1 December 1899 |
NLB/19/814 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons | 2 January 1900 |
NLB/19/635 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, [Fellow of the Royal Society] | 15 November 1899 |
NLB/30/78 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, [Fellow of the Royal Society] | 24 January 1905 |
MC/19/390 | Letter from [John Allen] Harker, Cape House, Kingston Road, Teddington, to [Robert William Frederick] Harrison | 12 February 1904 |
NLB/30/582 | Copy letter from Joseph Larmor, to Dr John Allen Harker, [Fellow of the Royal Society] | April 1905 |
NLB/46/413 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, Fellow of the Royal Society | 27 July 1912 |
NLB/43/352 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, Fellow of the Royal Society | 14 December 1910 |
NLB/43/439 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, Fellow of the Royal Society | 16 January 1911 |
NLB/43/513 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, Fellow of the Royal Society | 1 February 1911 |
NLB/45/675 | Copy letter from Robert William Frederick Harrison to Dr J [John] A [Allen] Harker FRS | 22 April 1912 |
NLB/48/62 | Copy letter from Robert William Frederick Harrison, to Dr [John Allen] Harker, Fellow of the Royal Society | 5 May 1913 |
NLB/50/254 | Copy letter from Robert William Frederick Harrison, to Dr [John Allen] Harker, Fellow of the Royal Society | 4 June 1914 |
NLB/48/162 | Copy letter from Robert William Frederick Harrison, to Dr [John Allen] Harker, Fellow of the Royal Society | 27 May 1913 |
NLB/50/275 | Copy letter from Robert William Frederick Harrison, to Dr [John Allen] Harker, Fellow of the Royal Society | 9 June 1914 |
NLB/50/213 | Copy letter from Robert William Frederick Harrison, to Dr [John Allen] Harker, Fellow of the Royal Society | 26 May 1914 |
RR/20/108 | Referee's report by John Allen Harker, on a paper 'The origin of thermal ionisation from carbon' by J N Pring | August 1913 |
RR/22/46 | Referee's report by John Allen Harker, on a paper 'The consumption of carbon in the electric arc. I - Variation with current and arc-length. II. - Influence upon the luminous radiation from the arc' by W Geoffrey Duffield | July 1915 |
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/53/174 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [John Allen] Harker, FRS | 16 May 1916 |
NLB/54/592 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [John Allen] Harker, FRS | 27 June 1917 |
NLB/56/336 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [John Allen] Harker, FRS | 15 January 1919 |
RR/23/21 | Referee's report by John Allen Harker, on a paper 'The consumption of carbon in the electric arc - Part VI - Alternating current' by W S Duffield and Mary D Waller | February 1916 |
NLB/56/85 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [John Allen] Harker, FRS | 15 November 1918 |
RR/26/56 | Referee's report by John Allen Harker, on a paper 'On the viscosities of the hydrogen halides' by H Harle | [1921] |
NLB/56/121 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [John Allen] Harker, FRS | 26 November 1918 |
RR/23/101 | Referee's report by John Allen Harker, on a paper 'Ignition of gases at reduced pressure by continuous current break sparks' by W M Thornton | June 1916 |
AP/72/6/2 | Unpublished diagrams, experimental apparatus by John Allen Harker | 1895 |
RR/13/36 | Referee's report by Arthur William Rucker, on a paper 'On the determination of freezing points' by John Allen Harker | 11 July 1896 |
RR/14/178 | Committee report, 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 | 19 July 1899 |
RR/18/150 | Referee's report by John Allen Harker, on a paper 'On the absolute measurement of light: A proposal for an ultimate light standard' by R A Houstoun | April 1911 |
RR/18/174 | Referee's report by John Allen Harker, on a paper 'Experimental work on a new standard of light' by W A Harwood and Joseph Ernest Petavel | January 1911 |
NLB/55/880 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [John Allen] Harker, FRS | 21 October 1918 |
NLB/62/720 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [John Allen] Harker, FRS | 12 April 1922 |
NLB/65/467 | Copy letter from Francis Alexander Towle, Assistant Secretary and Librarian of the Royal Society; to Messrs J. F. Crowley and Partners; 16 Victoria Street, S.W.1. | 5 November 1923 |
NLB/65/355 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Richard [Tetley] Glazebrook, KCB, FRS | 19 October 1923 |
RR/24/22 | Referee's report by John Allen Harker, on a paper 'The specific heat of aqueous solutions, with special reference to sodium and potassium chlorides' by William Robert Bousfield and C Elspeth Bousfield | [July 1917] |
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] |
NLB/65/387 | Copy letter from Charles [Scott] Sherrington, President of the Royal Society; to Mrs Harker | 25 October 1923 |
NLB/13/183 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, Springfield House, Churchgate, Stockport, [Fellow of the Royal Society] | 26 June 1896 |
NLB/14/805 | Copy letter from the Secretary of the Royal Society, to the Under Secretary of State for Foreign Affairs, The Foreign Office, S.W. | 22 May 1897 |
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 |
RR/20/60 | Referee's report by Ernest Rutherford, on a paper 'On the electrical emissivity and disintegration of hot metals' by John Allen Harker and George William Clarkson Kaye | May 1913 |
NLB/19/692 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, [Fellow of the Royal Society] | 24 November 1899 |
NLB/20/714 | Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker | 22 June 1900 |
NLB/48/773 | Copy letter from Robert William Frederick Harrison, to Dr [John Allen] Harker, Fellow of the Royal Society | 10 October 1913 |
NLB/56 | New Letter Book volume 56, copy letters sent from Royal Society administration | 1 November 1918-27 June 1919 |
NLB/62/570 | Copy letter from John [Millar] Thomson, Chairman of the Library Committee; to the Members of the Library Committee | 14 March 1922 |
RR/19/134 | Referee's report by John Allen Harker, on a paper 'A spectro-photometric comparison of the emissivity of solid and liquid gold at high temperatures with that of a full radiator' by C M Stubbs and E B R Prideaux | [August 1912] |
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 |
AP/72/6/1 | Unpublished manuscript, 'On the determination of freezing-points' by J A [John Allen] Harker | 1895 |
AP/72/6 | Unpublished paper, 'On the determination of freezing-points' by J A [John Allen] Harker | 1895 |
RR/14/176 | Referee's report by Hugh Longbourne Callendar, 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/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/21/149 | Referee's report by John Allen Harker, on a paper 'The electrical ignition of gaseous mixtures' by W M Thornton | [February 1914] |
RR/25/41 | Referee's report by John Allen Harker, on the Bakerian Lecture 'Experiments on the artificial production of diamond' by Charles Algernon Parsons | [October 1918] |
MC/19/393 | Letter from [John Allen] Harker, Cumberland, to the Royal Society | 24 June 1904 |
Mc/19/392 | Letter from [John Allen] Harker, Carlisle, to the Assistant Secretary of the Royal Society | 22 June 1904 |
MC/26/106 | Letter from [John Allen] Harker, The National Physical Laboratory, Bushy House, Teddington, Middlesex, to The Secretaries of the Royal Society | 13 January 1911 |
MC/26/107 | Letter from [John Allen] Harker, National Liberal Club, Whitehall Place, S.W, to Sir Joseph Larmor, [Royal Society] | 31 January 1911 |
MC/26/99 | Letter from H.C Greenwood, 88 Harcourt [Road], Sheffield, to The Assistant Secretary, The Royal Society, Burlington House, W | 28 December 1911 |
NLB/43/593 | Copy letter from Robert William Frederick Harrison, to John Allen Harker, Fellow of the Royal Society | 20 February 1911 |
MC/28/130 | Letter from [John Allen] Harker, Meteorological Office Observatories, The Observatory, Eskadalemuir, Dumfries-Shire, to Mr [Robert] Harrison | 20 April 1913 |
NLB/47/793 | Copy letter from Robert William Frederick Harrison to Dr J [John] A [Allen] Harker FRS | 15 April 1913 |
MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
MC/28/129 | Letter from [John Allen] Harker, Meteorological Office Observatories, The Observatory, Eskadalemuir, Dumfries-Shire, to Mr [Robert] Harrison | 14 April 1913 |
MC/28/131 | Letter from [John Allen] Harker, Meteorological Office Observatories, The Observatory, Eskadalemuir, Dumfries-Shire, to Mr [Robert] Harrison | 24 April 1913 |