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Digital Collections

Photographs

Refractometer

  • 1950s

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View of a chemist checking the refractive index of an oil sample in a refractometer at the Norda Company plant in Boonton, New Jersey.

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  • Courtesy of Science History Institute

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  • Box 1

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Cite as

Norda Essential Oil and Chemical Company. “Refractometer,” 1950–1959. Norda Essential Oil and Chemical Company Photograph Collection, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/pc289j04q.

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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.