A circular slide rule is compact precisely because it wraps a linear slide rule around the circumference of a circle.
A linear slide rule is (was) for education - we always see that ln(a + b) = ln a * ln b.
A circular slide rule is for engineers.
When I was studying, circular slide rules were prohibited at my university.
Bart Briggs wrote:
I like my women like I like my numbers: irrational and transcendental.
and, sorry, real and, sorry one more, natural
There is/are a lot of very nice Arabian or Roman women, sorry, numbers...
I think Dan is now cut off this branch of this Math-discussion