Body Image No. 1

D, A, T (Spiral), ST, S, CI, Sh (Spiral), Th, K, L



CLICK to Download the PDF Here is the first of three templates for circular slide rule backgrounds. This one is for a general-purpose rule, except that hyperbolic functions are present, and log-log scales omitted. This is peculiar, but it is intended this rule will be used in conjunction with the one with two four-decade log-log scales, normal and reciprocal, as part of a set.

Body Image No. 2

D, A, M (Spiral), CI P, vP, rI, LL, L



CLICK to Download the PDF This is the second of three possible backgrounds for the circular slide rule. This one features a logarithmic scale for multiplication that makes five turns around the rule. Unlike earlier versions of my circular slide rule, I put it far enough towards the outside that I could graduate it for a 20 inch rule instead of as for a 10 inch rule. Given the binary capability of the overlay design, it can indeed be used for accurate multiplication.