Thus it was written in the epistle of Art Bahrs,
>
>    But does anyone else have a 'circular slide rule'?  Yep... I got one at a
> rummage sale decades ago for the math and physics formulas that are on it as
> well as the periodic table that is on the back of it!!

Yup.  Got one of those, too :-).  Mine doesn't have formulas and a periodic
table, though--it's just a boring, old circular slide rule chock full of scales
on both sides :-).  That's really cool, Art.  What scales does it have?  C and
D, of course, but what else?

Ted
--
Ted Ashton ([log in to unmask]), Info Sys, Southern Adventist University
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Practical application is found by not looking for it, and one can say that
the whole progress of civilization rests on that principle.
                        -- Hadamard, Jacques
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         Deep thoughts to be found at http://www.southern.edu/~ashted