A Bridge for Bombards, with a Wheeled Device
A military bridge to carry artillery, and a linked-wheel mechanism below
The upper sketch, labelled 'bridge for bombards,' shows a low horizon of small gabled buildings behind a hatched structure meant to carry artillery. Below it Leonardo draws a mechanism of three circular wheels linked within a square frame by a jointed, zigzag rod. Only the single caption is transcribed; further faint writing shows through the sheet and is not included here.
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A bridge for bombards
A caption identifies the upper drawing as a 'bridge for bombards' — a structure to move or support cannon. It rises above a horizon of small buildings, drawn with hatched supports.
Horizon of small gabled buildings
Behind the bridge a thin ground-line carries a scatter of small buildings with pitched, gabled roofs, sketched as a townscape or besieged setting. No text accompanies them.
Linked-wheel mechanism below
In the lower right a square frame encloses three circular wheels or rollers connected in a line, with a jointed zigzag rod running down from them. It bears no transcribed caption.