- 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
- accession number
- See more items in
- Medicine and Science: Physical Sciences
- Data Source
- National Museum of American History
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