Hughes carbon rod microphone
notes: label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from International Business Machines, Inc., William J. Hammer Collection
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320865
label: catalog number
content: 320865
label: accession number
content: 241402
objectType: label: Object Name
content: Telephone Transmitter
label: Object Name
content: microphone
label: Other Terms
content: Telephone Transmitter; Telephones; Transmitter; Magneto, Carbon
physicalDescription: label: Measurements
content: overall: 10 in x 8 1/2 in x 3 in; 25.4 cm x 21.59 cm x 7.62 cm