Selenium Cell

Selenium Cell

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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.
Currently not on view
Object Name
Selenium Cell
Ruhmer, Ernst
overall: 6 3/4 in x 1 3/8 in; 17.145 cm x 3.4925 cm
ID Number
catalog number
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Medicine and Science: Physical Sciences
Data Source
National Museum of American History
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