Geissler tube with liquid-filled external tube
notes: label: Description (Brief)
content: A Geissler tube with outer envelope containing a pale yellow liquid, and internal glass structure consisting of (in series) a chamber, a spiral with bend, and another chamber. A metal electrode is inserted at both ends. Almost all air has been evacuated from the internal structure. When an electrical charge is passed between the electrodes, the remaining air in the tube glows, and the light is colored by the liquid. Geissler tubes were used as demonstration pieces and occasionally as lamps.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Columbia University, Department of Physics, thru Alvin P. Tramm
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.322945.01
label: catalog number
content: 322945A
label: catalog number
content: 322945.01
label: accession number
content: 249200
objectType: label: Object Name
content: Geissler Tube
label: Other Terms
content: Geissler Tube; Electron Tubes
physicalDescription: label: Measurements
content: tube: 6 1/2 in x 1 1/4 in x 1 in; 16.51 cm x 3.175 cm x 2.54 cm