Electrostatic spiral
notes: label: Description (Brief)
content: An electrostatic spiral demonstration piece with brass hook, 3/4" diameter glass tube with internal foil spiral (about 50% of the foil dots are missing), brass contact caps. The user hung the piece on the prime conductor of a generating machine. A spiral of foil dots line the inside of the glass tube. As an electrostatic charge from the machine passed through the foil spiral to the grounded contact on the bottom, sparks jumped the minute spaces between the foil dots creating a visual effect.
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.322944
label: catalog number
content: 322944
label: accession number
content: 249200
objectType: label: Object Name
content: electrostatic device
label: Object Name
content: Electrostatic Spiral
label: Object Name
content: Electrostatic device
physicalDescription: label: Measurements
content: overall: 17 in x 1 1/2 in x 1 1/4 in; 43.18 cm x 3.81 cm x 3.175 cm
label: Measurements
content: glass only: 10 1/4 in x 1 in; 26.035 cm x 2.54 cm