f82v: those rainbows

[VViews]

Hi Searcher,
This explanation has the benefit of explaining the double rainbow feature, and certainly a medieval mind would immediately associate the double rainbow to the type of iconography your image and the one I posted display, as it was extremely widespread.

I think we have to also take into account that there is another rainbow on this folio, represented at the top of the page, which to me really echoes the idea that rainbows are formed on the side of clouds, expressed in Ovide Moralisé:



And then on the next page, we have another rainbowy-looking feature, although that one's ends are clearly drawn like tubes, which could mean that the rainbow has been recreated using lab equipment:



Could it be that the author is discussing rainbows, showing how they are formed in nature, how they can also be double, and then how you can recreate them in the lab, or something along those lines?