The art of measuring made easy, by the help of a new sliding-rule: which performs the same at one operation, ... By W. Bradford, R. Darby, and J. Hulls, philomath' all of Campden in Gloucestershire ...
Bradford, William,teacher of mathematicks.
Darby, R.
Hulls, Jonathan,1699-aut
Coventry : printed in the year,
1756.
The first leaf contains an 'Abstract of his Majesty's Royal letters patent' for 'a portable instrument for detecting frauds by counterfeit gold'.
ESTC