JTWad@a... wrote:
> Bugbear finds a scaling rule of some sort:
>
> B18 3/4 1.0 B19 1/2 .96 B20 1/2 .9231
>          B21 .888 B21 3/4 .8627 B22 1/2 .834 B23 1/4 .808
>          B24 .7843 B24 3/4 .7582
>
> It will not have escaped your attention that the B scale numbers are
> inversely proportional to the length of the marked intervals; e.g.,
> 18.75*1 is (within reasonable measuring tolerance) = 19.5*.96 = 20.5
> *.9231, etc.

Indeed. The scale marking appears to be the "equivalent length" of some
constant. In fact, the constant is 18 3/4, and the scale number is "how
bit is 18 3/4" inches"

Now why on earth is 18 3/4" the chosen "magic" value?

    BugBear
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