<Real Pi 3.141592654 / 0.816 = 3.849990997 rounding to 3.85
3.85 x 0.816 = 3.1416.>
The figure 38.5 is one I encounter in many places, but most prominently in my old study of Wine gallons years ago. The definition of the current US gallon of 231 cu/ins., formerly known as the Queen Anne gallon after it became statute during her reign, was expressed as a cylinder of 7" base x 6" height. Using the formula for the volume of this cylinder as PiRsq., or 3.5 ins. squared = 12.25 x 22/7 = 38.5 area of circle x 6 = 231 cu/ins. The ratio of this rounded Thom Pi of 3.1416 to that of 22/7 being 2499/2500. Can't say I've encountered that one before now. Although I have encountered the ratio 22/7 x 2485/2486 = 355/113 Pi ratio in the past. My question at this point is, how was this ratio applied in your studies of Thom's work? Was it purely a circumferential unit formula, or did it have anything to do with areas? The reason I ask, is that 3.85sq./ 2.72sq. = 2.003473724, or nearly 2/1 in ratio.