Received 1899 November 11, answered by [Guglielmo Marconi?]
name: label: Collection Creator
content: National Museum of American History (U.S.). Division of Information, Technology and Society
setName: label: See more items in
content: Electricity and Modern Physics Photonegatives
unitdate: label: Date
content: 1899 November 11
container: label: Container
content: Box 21, Folder 4
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Negatives