Crookes Tube for Cathode Ray Demonstration
notes: label: Description (Brief)
content: Crookes tube for demonstrating cathode ray independence of positive pole, marked: "P1B2". Pear-shaped construction. Concave focusing cathode is mounted in tube with three rod-type anodes. Five inch glass stem forms base of tube. Purpose of the tube was to trace the path of an electron beam through a partial vacuum by observing luminosity patters as positive voltage was applied to each anode. Reference: Crookes, "On Radiant Matter," 1881, pages 11-14.
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.323680
label: catalog number
content: 323680
label: accession number
content: 249200
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: cathode ray tube
label: Object Name
content: Crookes tube
label: Object Name
content: crookes tube
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 14 in x 5 in; 35.56 cm x 12.7 cm