Bombards, a timber vault, columns, and polyhedra
Two gun-barrels with a powder-and-shot note, a vault of interlocking beams, and geometric solids.
The leaf mixes applied architecture with artillery and geometry. Along the top a long horizontal gun-barrel rests on decorated columnar ends, carrying an inscription and a note that thirty-six balls are to be matched by an equal weight of powder; a second barrel appears in profile on a column at the right, and moulded column bases and capitals are worked out in profile along the bottom. At the upper right a large vault is built up from crisscrossed interlocking timber bars, and at the left-center a cluster of polyhedra and a honeycomb of hexagons are drawn.
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Bombard with a powder-and-shot ratio
A long gun-barrel spans the top of the sheet on ornamented columnar supports, bearing an inscription ending '...ODONA.' The accompanying note calls for thirty-six balls and 'as many pounds of powder as of ball'—an equal weight of charge to projectile.
Column profiles and a second barrel
At the right a second gun-muzzle is shown in profile mounted on a column, labeled simply 'Columns.' Along the lower edge several moulded column bases and capitals are drawn in careful profile.
Vault of interlocking beams
At the upper right a broad arch or vault is assembled from short timber bars locked over and under one another into a self-supporting lattice, drawn in perspective.
Cluster of polyhedra
At the left-center a group of solid figures is drawn—octagonal prisms, a honeycomb of hexagons, and other faceted bodies clustered together as a study of solid geometry.