Pin-wheels, gearing and a possible escapement
Clockwork-like studies for an alternating motion in red chalk
Several red-chalk mechanisms are grouped on this sheet for producing an alternating motion: a wheel studded with pegs (a pin-wheel or lantern gear), a toothed wheel driven by a rack, and, at the right, a spindle carrying a pegged ring that may act as an escapement. Further rough sketches fill the leaf. No text was transcribed for this page.
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Pin-wheel and rack-driven toothed wheel
At the left a wheel set with pegs meshes as a lantern gear, while above a toothed wheel is driven by a straight rack.
Spindle with pegged ring, possibly an escapement
At the right a vertical spindle carries a ring of pegs and cross-arms, arranged as what may be an escapement to regulate an alternating motion.