Three inventions: a torsion-bar for measuring forces, a drill-bit, and a lens. Engraving by Mutlow, c. 1812, after J. Farey.

    • Farey, John, 1791-1851.
    Date:
    1 May 1812
    Reference:
    45421i
    Catalogue details

    Licence: Public Domain Mark

    Credit: Three inventions: a torsion-bar for measuring forces, a drill-bit, and a lens. Engraving by Mutlow, c. 1812, after J. Farey. Wellcome Collection. Source: Wellcome Collection.

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