Thanks for the well thought reply. You mention here:
<I have suggested that Michell's 'Canon of Ancient Measure' is based on a scaled circumference of 132000000 feet and this is against Jim Wakefield's unit of 1320 feet ( incidentally the length of the lesser cursus at SH )
So a model as 1000000 units of 132 feet ot 11 x 12 feet.
Using this model your unit represents a circumference of 131250000 feet and this is 750000 feet short of the top of the scale.
It equates to 24857.95455r miles very close to the polar circumference but not quite.>
This is very correct, in that John Michell initially determined the Idealized Earth sphere as 25,000 Mi. Circ., no matter how you factor it a very long time ago. But this was only a practicality, mostly due to the simplistic calculations of distances by the old Sumerian Pi ratio 25/8 = 3.125 units. However, it was also understood that in order to achieve a more accurate Pi ratio as 22/7, then either the circumference had to be shortened by, or the diameter be increased by a 176/175 ratio. And all I did was reduce this Idealized Sphere, by that same ratio to derive the Polar Meridian Circ. as you see it. But that was not how I initially discovered this figure as a more realistic value for the Polar Meridian Circ, comparable to today's known dimension's of the Earth. Actually, it was by ratio of ancient weight units of the Lb. Avoirdupois of 7000 grs./ Troy Lb. of 5760 gr., that gives a decimal equivalent to the Geographic Ft. that corresponds to this Circ. also, as 7000/5760 = 1.2527777 x 1000 x 1,296,000 Arc.Secs. = 1,575,000.000 Ins. Which is equal to the same Circ. value when divided by 12 ins. and 5280 Ft. per Mi. And the figure 157.5 equates to the grain weight of a cubic inch of Barleycorns as well. Whereas, a cubic inch of Water is in ratio to Barley by 8/5, gives Water whole integer of 252 grs. per cu.in., at a specific temperature of around 80*F.
Which figure anticipates your next comment here:
<Multiplying 39.375 by 64 gives 2520 and this is stade again ann approximation for the polar circumference as 360 x 7.>
You are no doubt recalling Eratothene's famous calculation of the Earth as 252,000 Stadia in this case. And it is my personal opinion that he never actually made that calculation based on any real measurements from Syrene to Alexandria to obtain that figure, since these two cities don't like due North of each other. But that didn't make him wrong in this case. It all depends on what figure of a Stadia one is referring to. I like one of 6250 ins. or 520.8333 Ft., which is 1 Ft. increased by the well known ratio 25/24 = 12.5 ins. x 500 units. And multiplied by 252,000 Stadia = 131,250,000 Ft. once again. I would like to point out, I am not the first metrologic researcher who has arrived at this same Polar Meridian Circ. figure, and nearly at the same time as myself yrs. ago, as far a publicizing their calculations.
Which brings me to your last query about my research into Megalithic measures. And to tell you the truth, I haven't done a whole lot with those units over the course my studies, as there appears to be so much controversy surrounding everyone's favorite value for this mysterious unit of a Megalithic Yard. I've heard them all by now I hope LOL! One that I decided to add to the ever growing list of candidate measures, consisted of another Barley grain calculation involving a cubic Ft., or 1728 cu./ins. x 157.5 grs. per cu./in. = 272,160 grs, which only needs to be decimal point shifted to 2.7216 Ft. What makes this figure interesting in relation to the initial one I mentioned, is that it is in ratio to 2.7225 Ft. by another well known comma factor of 3024/3025. Can you say GP perimeter dimensions here? LOL! But other than what I posted the other day, regarding this latter MY unit's division by the Old Meter value to arrive at another well known Earth Circ. used by a metrolgic minded poster here named Jacob Boaz, who also uses that same 3025/3024 ratio to adjust his calculations to John Michell's Canonical Earth Circ. model, I'm still working on finding other useful applications for it at this time. Got any suggestions in this study I should consider?