Cosmic wheel: zodiac and planets as a turning, grinding mill
A great toothed circle labelled Zodiac, Earth, Mercury, Venus and Moon, driven by a crank
A large circular diagram fills the sheet: a toothed inner ring within a great circle crossed by radiating lines, with a small crank-driven winch or geared device sketched at the lower left. A note likens the mechanism to a wheel and ratchet that turns and grinds like a mill, enduring the same labours, while labels within the figure name the Zodiac, the Earth, and the planets Mercury, Venus and the Moon. The sheet thus fuses a cosmological scheme with a mechanical, mill-like analogy for the motion of the heavens.
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Cosmological labels within the great circle
Inscriptions inside the large circular figure name the Zodiac and the Earth, together with the planets Mercury and Venus and the Moon, arranging the heavens as a series of rings around the wheel.
A wheel and ratchet that turns and grinds
A note explains that the device is nothing other than a wheel and ratchet that turns and grinds like a mill, and that its effects work in the very same manner and must endure the very same labours.
Toothed ring and crank device
The drawing shows a toothed inner ring set within a larger circle crossed by radiating spokes, with a small crank-driven drum or geared winch sketched at the lower left that would set the wheel turning.