Selenium Cell
name: label: inventor
content: Ruhmer, Ernst
notes: label: Description
content: The selenium cell—a photoelectric device containing the element selenium—reflects the research of the German physicist, Ernst Ruhmer. This example belonged to tge early American electrical engineer, William J. Hammer. It may be the one he displayed in a lecture in 1903; or it may reflect his 1907 patent.
label: Description
content: Ref: “The Properties and Applications of Selenium," in William J. Hammer, <i>Radium and Other Radioactive Substances</i> (New York, 1903), p. 57.
label: Description
content: William J. Hammer, “Selenium Cell,” U.S. Patent 866462 (Sept. 17, 1907).
label: Description
content: Max Kohl, <i>Physical Apparatus</i> (Chemnitz, 191?), p. 933.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.320871
label: catalog number
content: 320871
label: accession number
content: 241402
objectType: label: Object Name
content: Selenium Cell
physicalDescription: label: Measurements
content: overall: 6 3/4 in x 1 3/8 in; 17.145 cm x 3.4925 cm