f82v: those rainbows

[ReneZ]

This whole rainbow discussion has been mildly 'bugging' me for a while.

Let me see if I get this right. There are (proposed) rainbows on You are not allowed to view links. Register or Login to view. and f83r.
These two pages face each other, but they are part of two different bifolios.

If it can be agreed that these illustrations are related, then this puts a constraint on the possible re-orderings of the bifollios in quire 13.

Now I can see no reason why the illustration on You are not allowed to view links. Register or Login to view. is anything else than a tube passing liquid between two pools.
There are openings on both sides, and the liquid is blue (one of two colours used for 'water' in Q13).

Now let's go back to f82v. There do not appear to be any openings, but there clearly is something like liquid (or vapour) coming in or going out both ends of both 'rainbows'. In this case, there are two colours: blue and green, which are the two colours used for 'water' in Q13.

I just see tubes and no rainbows.