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Scientific apparatus and instruments

44/54 Darmstadt logarithmic slide rule owned by Rosalind Franklin

  • 1950s

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Wooden slide rule belonging to molecular biologist, Rosalind Franklin (1920-1958), used to calculate logarithmic functions.

Frankin's initials, R. E. F., are written on the right-hand side of the rule.

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  • 4.3 cm W x .6 cm H x 57.1 cm L
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  • Science History Institute
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  • Courtesy of Science History Institute

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Science History Institute. 44/54 Darmstadt Logarithmic Slide Rule Owned by Rosalind Franklin. Photograph, 2025. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/36h5wxu.

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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.