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Digital Collections

Photographs, Negatives (Photographs)

Technicians titrating aluminum in Dow Chemical Company laboratory

  • 1944

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General view of technicians (left to right) Lois Nystrom, Rosemary Kirchman, and Helen Lyness using vacuum tube titrators to titrate aluminum in a Dow Chemical Company laboratory. In the titration process, a solution of unknown concentration is commonly added to a solution of known concentration to precipitate a reaction in order to find out more about the unknown substance.

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  • 4 in. H x 5 in. W
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  • Courtesy of Science History Institute

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  • Box 7, Folder Plants--Main Laboratory (Old)

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Dow Chemical Company. “Technicians Titrating Aluminum in Dow Chemical Company Laboratory,” 1944. Dow Chemical Company Historical Image Collection, Box 7, Folder Plants--Main Laboratory (Old). Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/9880vr53k.

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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.