Cylindrical slide rule

A slide rule using a cylindrical configuration to allow several feet of rule to be included in an instrument only a few inches long. The one shown was made about 1900. It is twenty inches long and can give four-or-five-place computational accuracy.

All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.