Cast iron disc
notes: label: Description (Brief)
content: Cast iron disc with a slightly tapered hole for use in electro-magnetic experiments. Supposed to have been used by Joseph Henry, founding Secretary of the Smithsonian.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.181747
label: catalog number
content: 181747
label: accession number
content: 33204
objectType: label: Object Name
content: Disc
label: Object Name
content: iron disk
label: Object Name
content: iron disc
physicalDescription: label: Measurements
content: overall: 1/2 in x 4 3/4 in; 1.27 cm x 12.065 cm