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
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Publication/Creation
London (Paternoster Row) : Sherwood & Co., 1 May 1812.
Physical description
1 print : engraving ; border 11.2 x 19 cm
Contributors
Lettering
Mr. Gregory's contrivance to determine horse-power in mills. American borer. Mr. Ez. Walker on light. ; Mutlow sc. Russell cot.
Reference
Wellcome Collection 45421i
Type/Technique
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Where to find it
Location Status Access Closed stores