Koen posted an interesting cosmological image in the 'wolkenband thread' You are not allowed to view links.
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I found that very interesting in a different context: For the first time I saw simple signs (little circles, little ticks in group of two) as part of the concentric circles , which I thought of depictions of elements.
In that context, I never found a hint for a similar depiction in the Rosette folio for the four spikes (in the Rosette folio) that connect four of the outermost spheres with the central sphere (see attached image).
Question now is, is that comparsion valid? Obviously only the little circle could be seen as a match but that is far from sure. But could the circles in the concentric display in:
Paris, Bibl. Sainte-Geneviève, ms. 1029, f 108 (angels cranking the celestial spheres, Bartholomaeus Anglicus, Le livre des propriétés des choses. c.1350) be related to the 'link of spheres in the Rosette folio (centre and four spokes) ? In the Rosette folio these are definitely four different little IDs commencing (1) circle, (2) two chevrons, (3) group of three ticks in italics and (4) group of three ticks in straight line/alignment.
If not, what could the circle and the group of two ticks (in ) or the four different signatures in the Rosette folio represent?