Crookes discharge tube
name: label: associated user
content: unknown
notes: label: Description (Brief)
content: Crookes Magnetic Deflection Tube, marked: "P1B19". Two electrodes, large flat circular cathode in one end, thick flat circular anode near middle with hole in the center. Glass separation between halves of tube, but with hole in center in line with hole of anode. Cathode rays projected from cathode to anode, but only those in line with the holes pass into the latter half of the glass tube. Magnets will deflect phosphorescence patch and will be especially noticeable because the rays here have been narrowed down to a small beam by the holes.
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.323677
label: catalog number
content: 323677
label: accession number
content: 249200
objectType: label: Object Name
content: Discharge Tube
label: Object Name
content: Crookes tube
label: Object Name
content: crookes tube
label: Other Terms
content: Discharge Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 19 3/8 in x 4 1/2 in x 1 3/4 in; 49.2125 cm x 11.43 cm x 4.445 cm