4 power flash telescope
date: label: date made
content: ca 1918
label: date made
content: ca. 1918
notes: label: Description (Brief)
content: A military signaling telescope from World War I. Includes a tungsten miniature lamp. Metal tag on unit: "Flash-telescope. Power 4 6-8 volts. Major R. W. Wood" and "Mark 1 U.S.N."
label: Description (Brief)
content: Donor was Robert Williams Wood (1868-1955), professor of optics at Johns Hopkins University (1901-1955). Inventor of "Wood's glass," a material transmissive of infrared and ultraviolet radiation used in military signaling devices during World War I. See US patent 1346580, "Flash Telescope," issued 13 July 1920; and US 1517332, "Signaling System," issued 2 December 1924.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Robert W. Wood
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.317948.03
label: catalog number
content: 317948.03
label: accession number
content: 232066
objectType: label: Object Name
content: telescope
physicalDescription: label: Measurements
content: overall: 9 3/4 in x 4 in x 2 3/4 in; 24.765 cm x 10.16 cm x 6.985 cm