No text, but a visual code

[Barbrey]

I do think it's a possibility at any rate, and I'm not really hung up on the language or script, just on the possibility that the script, not language, pattern might be deducible from the manuscript itself.. 

Your idea makes the whole thing an astrological treatise, but if all the "words" are astrologically-related, where are the words for plant, root, stem, medicine, processes like purification or distillation, etc. I think I believe herbal (as influenced by astrology) as the text's primary purpose, and in that case you'd need words of the plant variety, and process words to boot.

A difference of emphasis.  

I wonder if "o" could be degree as well, for instance, but also wonder if cc and ii words correspond to degrees as well, but for heat, water, medicinal temperatures instead.  So ar might mean boiling point, for instance, and aiir might mean two additional deviations above it.  I get a distinct impression that the r with the curly top is related to fire, both astrologically and in process.

Something that might interest you from the alphabet page on f 57.  I did an overlay of core symbols of the alphabet over the rosette page because the alphabet page seems to have a rosette in the middle too. And you know
that isolated label at the top of the page as if it's labelling it? No eva but looks like 8airox?  I was considering "a" as ci at that point, with c a 10 and i a 1.  So that translation would be "Earth (ruled by?) The 12 fires (star houses?) of Heaven. With your o as a degree that would be even more solid.

Just playing but there might be something in it for the astrologically minded!