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Digital Collections

Scientific apparatus and instruments, Electronics

Potentiometer

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BY 4.0

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Potentiometers are used to measure electromotive force (emf) by balancing it with a known emf. The concept was first developed in 1841 by J. C. Poggendorff and improved throughout the 19th century by Latimer Clark and J. A. Fleming.

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Extent
  • 5.5 in. H x 10.625 in. W x 7.325 in. D
Inscription
  • (On right knob) "MILLI-VOLTS"
  • (Top of panel) "LEEDS & NORTHRUP CO. / PHILADELPHIA / 167099 / MADE IN U.S.A."
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Rights Creative Commons Attribution 4.0 International License
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  • Courtesy of Science History Institute

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Science History Institute. Potentiometer. Photograph, 2016. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/0g354f27r.

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The Science History Institute recognizes there are materials in our collections that may be offensive or harmful, containing racist, sexist, Eurocentric, ableist, or homophobic language or depictions. The history of science is not exempt from beliefs or practices harmful to traditionally marginalized groups. The Institute is engaged in ongoing efforts to responsibly present and address the evidence of oppression and injustice inextricable from the history of science. If you would like to learn more about our ongoing efforts or if you encounter harmful, inaccurate, or insufficient descriptions, please contact us at digital@sciencehistory.org.