Triangular figures, a water-filled vessel, and a driven wedge
Geometric triangles above; pyramids weighing on their bases in water; a wedge in an iron-clad block
The upper half of the sheet is filled with triangular figures, a graduated wedge-shape and a row of saw-tooth triangles, tied to a note headed "triangular figures" and another on four triangles set within a square. A lower caption describes a vessel full of water in which several pyramids press with different weights upon their bases, drawn beside a box-like container pierced with openings. A further sketch, noted as inverted, shows a wedge driven into a composite block said to be surrounded by iron plates.
On this page
Triangular figures
Leonardo heads the studies at the top of the page simply "triangular figures." They correspond to the large graduated wedge-shape and the row of saw-tooth triangles ruled across the upper sheet.
Four triangles within a square
A second note describes four triangles superimposed within a square. It matches the square drawn at lower left with lines running from one corner to divide it into triangular fields.
Pyramids weighing on their bases in a water-filled vessel
A caption describes a vessel full of water in which various pyramids exert various weights upon their bases, together with a kind of box having various openings. The accompanying drawing shows a compartmented, box-like container.
A wedge driven into a composite block
Noted as drawn upside down, this study shows a wedge forced into a composite block that is said to be surrounded by iron plates. It treats the splitting action of a wedge reinforced against bursting.