Blueprints, schematics, and specifications
name: label: Collection Creator
content: Clark, George Howard, 1881-1956
setName: label: See more items in
content: George H. Clark Radioana Collection
label: See more items in
content: George H. Clark Radioana Collection / Series O: Addenda Materials
unitdate: label: Date
content: [1904-1921?]
container: label: Container
content: Box 532, Folder 8-10
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents
content: Includes: photoradio machine, thermionic brake, scanner carrier frequency unit, radio telegraph at U.S. Navy Yard, notes of Julius Martin (electrical engineer), air condensers, wiring diagrams, U.S. Army Signal Corps, and Marconi Wireless Telegraph Co.