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 N. B. For the Curious the Authors have Sliding-Rules of a particular Make, with Brass Slides at 7s. each - Bradford, William teacher of mathematicks (1756)
English Short Title Catalog, T225755
Reproduction of original from British Library
The first leaf contains an 'Abstract of his Majesty's Royal letters patent' for 'a portable instrument for detecting frauds by counterfeit gold'
Keywords: Mathematical instruments -- Early works to 1800; Slide-rule -- Early works to 1800