(This is not well-formed, but I feel the frustration of four/five years ago rising, and don't feel like improving its presentation.)
Nothing from any specific instance of the squiggle, unless it happens to be "complete" (whatever that may be), with utmost clarity and no background garbage.
While Bessler may not have put enough into that squiggle to completely give it away, I'd almost be willing to bet that it would be an easy comparison to see that the form in the squiggle closely represented what was inside his wheels, were any of us given the opportunity to make that comparison.
I tried quite some time ago to get closer to the source.
http://www.besslerwheel.com/forum/viewt ... +wallpaper
It was met with varying degrees of ridicule (wallpaper decoration, inkblot), some help with digital soap and water, but nothing closer to the source than the mikey ned items that were already available. I have not reviewed that topic, but I believe in it or elsewhere John Collins as well dismissed the squiggles as not useful, and did not offer or otherwise provide those items from his copy of DT (not that he in any way had any obligation to do so of which I am aware.)
Your reference to the online DT was the first additional instance I've had - I don't know where Ovyyus got his scans from, but if they are from JC's DT, and not discernible in JC's instance of DT, then perhaps JC's are useless. The online DT provides a clearer, if possibly slightly different, view, so I thank you for that (indirect) contribution to my efforts. (With reference to some other assertions in this thread, do we know that there was only one printblock created - there seem to be references to a woodcut and a copper engraving for some other images, could that also be the case for this secunda figura item as well?)
As indicated in the above referenced post, I believe those images depict an arrangement of levers and weights that were inside Bessler's wheels. I believe there are probably actually two mechanisms there, guessing that the upper third likely powered the one directional wheel (probably multiple instances of it, although only one may have been necessary to obtain > 1 revolution), and the two lower thirds comprising the mechanism driving the bi-directional wheel (as it seems to have a mostly symmetric relationship between the two halves of the bottom two thirds.)
As for exactly _what_ that arrangement is, or at least hints at, that previous topic contains some of my attempts at interpreting the pieces. I didn't know what exactly I was looking for, merely that I could discern the presence of compound levers and probable weights of some uncertain interconnecting arrangement.
I am looking for an arrangement that might satisfy at least some, of the actions hinted at by the toy page, and what few of the clues I manage to retain in my head. (Wasn't one of the clues something about 'hidden in plain sight'?)