Brooks Newman demonstration microphone device
date: label: date made
content: 1891
notes: label: Description (Brief)
content: Wooden box with earpiece in center of hinged metal top. Unit is essentially a diaphragm-type transmitter with a carbon cylinder mounted inside. Brass cross pieces provide support for the carbon unit and contact spring. Marked: "Brooks / 1891 / Newman".
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Dunbar High School, thru Charles Lofton
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.323735
label: catalog number
content: 323735
label: accession number
content: 252354
objectType: label: Object Name
content: Microphone
label: Other Terms
content: Microphone; Telephones; Transmitter; Carbon
physicalDescription: label: Measurements
content: overall: 6 in x 6 in x 3 in; 15.24 cm x 15.24 cm x 7.62 cm