William Litell Everitt and His Circular Complex Hyperbolic Slide Rule

摘要

This article explains the workings of a circular hyperbolic slide rule designed by William Litell Everitt around 1924. This date is a very early one for a slide rule of this type. This unique slide rule was designed by Everitt while he was working on his Master's degree in Electrical Engineering at the University of Michigan. This slide rule had an important.