No text, but a visual code

[Antonio García Jiménez]

If I am not mistaken, I believe that attention has never been paid to how cosmological diagrams represent the movement of the celestial spheres. Looks great on f68v1, f68v2 and f68v3:

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On the first folio, on the right, the movement is represented by a drawing that resembles the blades of a hydraulic mill. The blades are alternately painted blue to represent day and stars for night. The moon is drawn on the sun, whose rays protrude from the lunar head.

In the central folio the four blades full of stars look like those of a windmill of the time. And finally, on the left folio, in the center of which is a T-O map, we see eight spiral arms that produce the illusion of movement.