Brian, I to would like to understand it more, I think it may be the same geometric way of plotting the curve in a nautilus shell. If I remember it from school it had to do with the plotting thru the center of a box within a large box offset within a larger box and so on till the size of the desired "scroll" was attained it worked at that the shell on a nautilus was a perfect geometric progression or scroll and could be proved out this way.
Or I could be way off, School was a while ago!
Love learning new stuff, keep it going guys!
Tim