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, ...
Bradford, William,teacher of mathematicks.
Darby, R.
Hulls, Jonathan,1699-aut
Stratford : printed by J. Keating,
1761.
The cover title reads: 'By virtue of his Majesty's Royal letters patent. Granted unto W. Bradford, .. [i.e. No.686 of 1753]'.
With an initial leaf of patent: 'Abstract of his Majesty's Royal letters patent. George R. .. Whereas W. Bradford, .. '.
ESTC