An interesting observation on Quire 13

[VViews]

I am looking at these folios again and I must say that the 76-83 foldout is a problem for me.
I fail to see any internal coherency within this bifolio at all, whereas 83r ties in quite nicely with 82v (the "rainbow"-like tubes theme) which precedes it, both in the current foliation order and in the reordering proposed in the Reordering task subforum.