Catalog entry for various geissler tubes for demonstration purposes. Invented by the glassblower, Johann Heinrich Wilhelm Geissler (1815-1878), a light is produced when an electric current is passed through the rarefied gas-filled tubes.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory instruments for the physical sciences made by the Central Scientific Company. Founded in 1900 in downtown Chicago, Central Scientific manufactured and distributed science teaching equipment for schools, colleges, and universities by catalog mail order. The trademark CENCO was used from 1909 onwards.
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Central Scientific Company. “Various Geissler Tubes.” Physical Apparatus for Universities and Colleges Manufactured and Imported by Central Scientific Co. Chicago, Illinois: Central Scientific Company, 1912. Q185.7 .C46 1912. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/f8jmgvu.
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