The art of measuring Made Easy, by the help of a new sliding-rule; which performs the same at one operation, as requires Two, Three, or More, On the Sliding-Rules heretofore used. in a Plain, easy, and concise Method, entirely new. By W. Bradford, R. Darby, and J. Hulls, Philomath. All of Campden, in Gloucestershire. - For the Curious the Authors have Sliding-Rules of a particular Make, with Brass Slides, at 7s. each - Bradford, William teacher of mathematicks (printed by J. Keating, 1765)