oa Platinum and the Greenwich System of Time-Signals in Britain

References

1. D. Howse, Greenwich Time and the Discovery of the Longitude”, Oxford, 1980, pp. 81–115 [Google Scholar]
2. W. Ellis, Lecture on the Greenwich System of Time Signals”, Horol. J., 1865, 7, 85–91, 97–102, 109–114, 121–124; Nature, 1876, 14, 50–52, 110–113 [Google Scholar]
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4. Particularly the Airy Papers in the archives of the Royal Greenwich Observatory
5. “Dictionary of National Biography”, 1901, Supplement, 1, 22–25. Obituary notices: Proc. Roy. Soc., 1892, 51, i–xxi; Mon. Not. Roy. Astron. Soc., 1892, 52, (4), 212–229; Corporation of London, “London’s Roll of Fame 1757–1884”, London, 1884, pp. 305–308 [Google Scholar]
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7. RGO 6/610, sect. 3: letter Airy to Walker, 12 June 1849
8. RGO 6/721, sect. 12: letter Airy to Dent, 20 November 1848
9. Ibid.: letter Dent to Airy, 21 November 1848
10. RGO 17/1: “Report of the Astronomer Royal to the Board of Visitors”, read 2 June 1849, pp. 15–16
11. RGO 6/610, sect. 3: report Glaisher to Airy, 19 May 1849
12. Ibid.: letters Walker to Airy, 23 May and 11 June 1849
13. RGO 6/612, sect. 16⋆: letters Walker to Airy, 9 June 1851, and Shepherd to Airy, 21 June 1851; Great Exhibition of 1851, “Official Descriptive and Illustrated Catalogue”, London, 1851, 1, sect. 2, pp. 419–422 [Google Scholar]
14. RGO 6/724, sect. 37: letter Airy to Shepherd, 7 October 1851
15. RGO 6/610, sect. 3: letter Airy to Herbert, 19 September 1851
16. Ibid., sect. 1: letter Airy to Baring, 26 November 1851
17. E. Palmer, New Catalogue … of apparatus, illustrative of … Voltaic Electricity … &c”., London, 1840, p. 41. Copy in British Library: 787.f.20( 1–2) [Google Scholar]
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21. RGO 6/635, sect. 19: letter Walker to Airy, 17 May 1854
22. RGO 6/160, sect. 6: “Documents relative to the Electro-Chronograph invented by John Locke … in the Year 1848”, Newark (New Jersey), 1849, pp. 1–38 (especially 21–22)
23. W. R. Grove, On a small Voltaic Battery of extraordinary energy”, Rep. Brit. Assoc. Adv. Sci., Ninth meeting (Birmingham, 1839), 1840, 36–38; Phil. Mag., 1839, 15, 287–293 [Google Scholar]
24. Op. cit., Ref. 3, 138–139
25. RGO 6/628, sect. 59: report by Todd, 15 October 1857
26. G. B. Prescott, History, Theory, and Practice of the Electric Telegraph”, Boston (Massachusetts) and London, 1860, pp. 27, 33 [Google Scholar]
27. British Patent 944; 1853 [Google Scholar]
28. British Patent 2555; 1854 [Google Scholar]
29. Op. cit., Ref. 3, 151; R. S. Culley, “A Handbook of Practical Telegraphy”, London, 2nd Edn., 1867, pp. 20–21 [Google Scholar]
30. Great Exhibition of 1851, “Reports by the Juries”, London, 1852, class x, pp. 291–292 [Google Scholar]
31. A. de la Rive, C. V. Walker, RGO 6/725, sect. 49: invoice, 29 September 1852. For a description of the clock see A Treatise on Electricity”, translated by London, 1858, 3, pp. 479–484 [Google Scholar]
32. RGO 6/611, sect. 1: letters Walker to Airy, 30 July, 6 and 16 August 1852
33. “Greenwich Time Signals”, The Times, 23 August 1852, 6, col. 6 [Google Scholar]
34. RGO 6/611, sect. 2: letter E. Clark to Airy, 28 August 1852; The Times, 8 September 1852, 5, col. 4: letter E. Clark to Editor [Google Scholar]
35. RGO 6/611, sect. 1: letter Walker to Airy, 20 September 1852; RGO 6/633, sect. 1: letter Walker to Airy, 30 May 1853; RGO 6/25: journal entry 6 October 1853
36. RGO 6/611, sect. 1 and RGO 6/627, sect. 32: letter Walker to Airy, 22 July 1853
37. Unpublished memoirs of Colonel Edward Matthey (1836–1918), 1918, pp. 40–41. The Johnson Matthey Group holds the only copy printed
38. For details of this battery see “The Atlantic Telegraph. A History … of the Undertaking”, London, 1857, pp. 58–60
39. RGO 6/726, sect. 26: invoice, 23 July 1853; order and invoice, 12 August 1853
40. Ibid., sect. 49: invoices, 7 July and 18 Oct. 1853
41. RGO 6/727, sect. 17: order, 19 January 1854
42. RGO 6/726, sect. 29: orders, 21 October and 22 December 1853
43. RGO 6/732, sect. 26: invoice, 22 May 1857
44. Ibid., sect. 28: invoice, 4 December 1857
45. RGO 6/628, sect. 23: letter Walker to Airy, 18 February 1858
46. RGO 6/629, sect. 8: letter Walker to Airy, 24 July 1858; RGO 6/735, sect. 9: letter Main to Reid & Co., 27 July 1858
47. RGO 6/629, sect. 6: letter Tyer to Airy, 20 December 1859
48. Ibid., letter Ellis to Airy, 4 February 1860
49. Culley, op. cit., Ref. 29, p. 21
50. RGO 6/630, sect. 9: MS. description by Ellis of apparatus at Greenwich, April 1862, p. 3
51. RGO 6/743, sect. 22: receipt, 19 May 1865
52. Ellis, 1865, op. cit., Ref. 2, especially 100–101
53. Op. cit., Ref. 1, p. 100
54. RGO 6/732, sect. 16: letter L. Clark to Airy, 19 November 1857
55. RGO 6/741, sect. 10: notes, 15 and 17 August 1863; probably the same design as described in “The Electric and International Telegraph Company”, Electrician, 1862, 1, (13), 147–148 [Google Scholar]
56. RGO 6/739, sect. 25: order, 9 July 1861; RGO 6/740, sect. 24: order, 14 February 1862
57. RGO 6/742, sect. 44: letter Ellis to Walker, 9 June 1864
58. RGO 6/745, sect. 41: order, 27 April 1867
59. RGO 6/754, sect. 8: final letter, Bishop to Airy, 18 July 1876
60. RGO 17/4: “Report of the Astronomer Royal to the Board of Visitors”, read 1 June 1889, p. 19