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Historic Gas Times%u2022 Issue 101 %u2022 December 2019 %u2022page7daytime district pressure being quite low. There is no mention of a separate governor or pressure regulator; the holder would be toppedup from the town%u2019s main when district pressure was high enough.Sometime in the early 20th century, McNiell%u2019s lamp was replaced with the present apparatus, involving 10 enormous burners which would each have had incandescent mantles the size of a sock. The 1847 lighthouse was replaced with a temporary light in 1915, itself replaced in 1926-7 with an electrically-lit lighthouse. The 1847 optic and its later gas burner, unique survivals, are now preserved in Hartlepool Museum.1 Bath Chronicle & Weekly Gazette, 29th March 18212 Robert Stevenson%u2019s evidence in Report from the select committee on lighthouses, 8th August 1834, paras 2095, 2109.3 Samuel Lewis, A topographical dictionary of Wales, 1840, 2nd edition. Vol. 1, under article on %u2018Holyhead%u2019.4 Report from the select committee on lighthouses, 1st August 1845, pp. 636, 655, 6585 Min.Proc.ICE, Vol. III, 1844, p. 343.6 Henri de Senarmont etc., Oeuvres completes d%u2019Augustin Fresnel, Vol. III, 1870, p. xxxv.7 Dundee, Perth & Cupar Advertizer, 22nd October 1847.8 Illustrated London News, November 6th 1847. The addresses come from the Post Office Directory, 1848.9 Ibid. No patent record has so far come to light.10 Dundee%u2026Advertizer, op.cit.11 ILN, op.cit.12 Ibid.13 http://www.hhtandn.com/venues/1037/lighthouseThe author would like to thank Bob Bowden for his drawings of the burner and John Horne for sharing his specialist knowledge. Julia EltonIt was about the year 1805 that Gas was first known in Glasgow as a method of lighting. A Mr. Lumsden, Bookseller in the Trongate, made gas in a small retort, heated in his fireplace, and lit his shop with it. Several others adopted this method about the same time. On 12th November 1805 James Watt, writing from Glasgow to his partner Matthew Boulton of Birmingham said, %u201cThe new lights are much in vogue here%u201d.The first introduction of gas lights into factories in the neighbourhood of Glasgow was in 1807, when a Weaving Shed at Pollockshaws was lighted by gas. There the gas retort was the old cylinder of a steam engine, six ft by 20 in diameter which, towards lighting time was heated to a bright red, the coals pitched in, and the old cylinder lid hastily bolted on. The gas was first led into a vessel placed in a large cask of cold water (a sort of condenser) whence it passed by pipes to looms in the factory. The flames, six to nine inches long, entirely eclipsed the old lamps.Understandably, the efficiency of the %u2018condenser%u2019 was low, and the gas was otherwise crude. To clear the pipes from coal tar, steam was blown through at stated times. Stand well clear of the open end!GLASGOW, 1807