by manipulating a scan of a Pickett pocket slide rule, done by me, Benjamin Crowell, in 2005. The slide rule does not have a copyright notice on it, and...
DescriptionSlide rule example4.svg A slide rule, aligned to calculate 5.5÷2 Date 2 February 2007, 18:29 (UTC) Source This is an SVG version of en:Image:Slide rule...
