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English: Color drawing of Geissler tubes lit by their own light, from an 1869 French natural philosophy book, showing some of the many fanciful shapes and colors. They were powered by high voltage from an induction coil. Invented by German glassblower Heinrich Geissler in 1857, Geissler tubes were the first gas discharge tubes and were manufactured for entertainment. Around 1910 they evolved into the first neon lights. Caption: "Electric discharge in rarefied gasses: 1.Discharge in Vapor of Alcohol. (2.3.4.5.Geissler's tubes enclosing rarefied gasses) 2.Shows Fluorescence of Sulphuret of Calcium, 4.Fluorescence of Uranium glass, 5.Shows Fluorescence of Sulphuret of Strontium, 6.Fluorescence of Uranium glass and Sulphate of Quinine".
Deiziad published in Augustin Privat Deschanel (1869) Traité Élémentaire de Physique, Librairie L. Hachette et Cie., Paris, p. 569
Mammenn Downloaded 2008-12-30 from Augustin Privat Deschanel, Joseph David Everett (1896) Elementary Treatise on Natural Philosophy, Part 3: Electricity and Magnetism, 13th Ed., D. Appleton & Co., New York, p.2, Plate 2, translated from Privat Deschanel's 1869 Traité Élémentaire de Physique by Joseph David Everett on Google Book. Image credited in caption to 'M. Rapine'.
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Public Domain in USA: Published in USA prior to 1923


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red18 Gen 2009 da 04:32Munud eus stumm an 18 Gen 2009 da 04:321 262 × 810 (225 Kio)Chetvorno= Summary == {{Information |Description={{en|Color drawing of Geissler tubes from an 1869 French natural philosophy book. Caption: "ELECTRIC DISCHARGE IN RAREFIED GASSES. 1.Discharge in Vapor of Alcohol. (2.3.4.5.Geissler's tub
31 Kzu 2008 da 01:21Munud eus stumm an 31 Kzu 2008 da 01:211 273 × 815 (284 Kio)Chetvorno{{Information |Description={{en|Color drawing of Wikipedia:Geissler tubes from an 1869 French natural philosophy book. |Source=Downloaded 2008-12-30 from [[http://books.google.com/books?id=AbYLAAAAYAAJ&pg=PA568 Augustin Privat-Deschanel (186

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