Rod set diametrically across a circle
A beam pivoting within a circle, with a partial figure above
A large circle is drawn in red chalk with a straight rod (asta) laid across it along a diameter and thickened at its centre, like a beam or balance pivoting within the circle. Above it a partial fan-shaped figure with radiating lines repeats a similar arrangement, and a small triangular pyramid is sketched at the lower right. Faint further writing, not transcribed here, runs down the right margin; no prose text was transcribed for the page.
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Rod set diametrically across a circle
A large circle is crossed by a straight rod laid along a diameter, thickened at its central pivot like a rotating beam or balance. Above, a partial fan-shaped figure with radiating lines repeats a similar arrangement. Faint further writing, not transcribed here, runs down the right margin.
Circle and small pyramid
The main figure is built on a full circle, and a small triangular pyramid is sketched at the lower right. The caption describes a diametral rod within a circle and, above, part of a similar figure.