Toothed wheel and mechanical details
Red-chalk studies of a cogwheel and gearing seen in perspective
The sheet carries light red-chalk studies that the catalogue identifies as a toothed wheel with mechanical details. A large scalloped cogwheel with a marked centre is drawn at the foot, set within a fainter circle, while an elliptical wheel with clustered teeth is shown edge-on at the left. A smaller circle divided by a diameter and a curved spoke appears at the top.
On this page
Scalloped cogwheel
At the lower part of the page a wheel with a scalloped, toothed rim is drawn around a central point, the teeth suggesting a gear. It sits inside a larger faint circle that may indicate its housing or a companion wheel.
Gear seen in perspective
At the left an ellipse represents a wheel viewed edge-on, with two clusters of teeth or lugs projecting from its rim. This foreshortened view complements the frontal cogwheel below, in keeping with the catalogue's 'mechanical details'.