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

  • John Farey, Jr.
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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