Are Foldouts Always Shorter to Left but Longer to Right?

[davidjackson]

Most of the famous foldouts formats which are quoted as Voynich forebears (the medic's almanacs) were never bound in book form. Instead they tended to be folded up in the same fashion as maps are today. See, ie, You are not allowed to view links. Register or Login to view. or You are not allowed to view links. Register or Login to view.
A very interesting investigation into one of the extant exemplars can be found on the website of the Royal Society, journal of the history of science, You are not allowed to view links. Register or Login to view..

If we look at the same sort of content produced professionally for (what is assumed to be) the same market (medics), we see a return to the normal book format (ie You are not allowed to view links. Register or Login to view.).

Foldouts do exist in some books, but I can't find my reference file on that right now, much to my annoyance!