Selenium Cell

Selenium Cell

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Description
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.
Ref: “The Properties and Applications of Selenium," in William J. Hammer, Radium and Other Radioactive Substances (New York, 1903), p. 57.
William J. Hammer, “Selenium Cell,” U.S. Patent 866462 (Sept. 17, 1907).
Max Kohl, Physical Apparatus (Chemnitz, 191?), p. 933.
Location
Currently not on view
Object Name
Selenium Cell
inventor
Ruhmer, Ernst
Measurements
overall: 6 3/4 in x 1 3/8 in; 17.145 cm x 3.4925 cm
ID Number
PH.320871
catalog number
320871
accession number
241402
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
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