Clocks: an escapement mechanism (top), and a pendulum (below). Engraving by E. Kennion after C. Varley.
- Varley, Cornelius, 1781-1873.
- Reference:
- 40937i
Licence: Public Domain Mark
Credit: Clocks: an escapement mechanism (top), and a pendulum (below). Engraving by E. Kennion after C. Varley. Wellcome Collection. Source: Wellcome Collection.
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