Circle and square; infinite slowness and speed of motion
Arcs of decreasing radius show motion can be infinitely slow or fast; a screw hoist
The folio combines geometry with a study of motion. A plain circle and square head the sheet, followed by a circle drawn with arcs of decreasing radius labelled a b, c d, e about its centre e. Leonardo uses this figure to argue that the slowness of a motion can be infinite, and likewise its speed. At the foot is a screw-operated lifting apparatus.
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Infinite slowness and speed of motion
Using a circle with arcs of decreasing radius (a b, c d, e) about its centre e, Leonardo argues that the slowness of a motion can be infinite, and its speed likewise, the arcs modelling how motion along them may be made ever slower or faster.
Circle and square
A plain circle set beside a square heads the sheet, a preliminary geometric pairing.
Screw-operated lifting apparatus
At the foot of the folio is a lifting apparatus worked by a screw ('apparecchio di sollevamento a vite').