Two men are using a plank over a large log as a see-saw; representing the mechanics of levers. Engraving.
- Date:
- 1700-1799
- Reference:
- 36106i
Licence: Public Domain Mark
Credit: Two men are using a plank over a large log as a see-saw; representing the mechanics of levers. Engraving. Wellcome Collection. Source: Wellcome Collection.
