The folio shows the drawing of a digger for excavating trenches or channels. It possibly refers to a project for the channel to connect the river Arno to the sea, near Piombino. The hoe lifts when the heavy rocker falls. The connected container acts as a counterweight and causes the hoe to drop with great force, thus digging the trench.
The model is based on the drawing:
- Manuscript L f. 76 v. (1503-1504)
Paris, Institut de France