The pupil of the eye, and a struck cube that rounds
A note on small bodies near the light, and percussion that swells a square block into a circle
A sparse sheet whose transcribed notes join two topics, accompanied by pen sketches: a chain of squares and parallelograms at the top right, a small square lettered along its diagonal, and faint figures at the left. Leonardo first observes that, among bodies smaller than the pupil of the eye, the one nearer the light is less noticeable. He then opens a heading 'On percussion made in dilatable material' and, beside a figure, states that a cube of extensible matter struck uniformly moves its extremities out evenly and turns from square into a circle. Further faint jottings appear on the sheet beyond the transcribed lines.
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Small bodies nearer the light are less noticeable to the eye
Among the bodies smaller than the pupil of the eye, that one will be less noticeable which is closer to the light itself. The note then announces a new subject, percussion in dilatable material.
A struck cube of extensible matter becomes circular
The cube of extensible material, when dilated by a percussion, if that percussion is uniform, will uniformly move its extremities outward and from a square will become circular. The claim is set beside a figure showing the transformation of the block's outline.