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Brown, John (Philomath). The description and use of the trianguler-quadrant : being a particular and general instrument, useful at land or sea; both for observation and operation. More universally useful, portable and convenient, than any other yet discovered. With its uses in arithmetick. Geometry, superficial and solid. Astronomy. Dyalling, three wayes. Gaging. Navigation. In a method not before used. By John Brown, philomath

Brown, John (Philomath). The carpenters joynt-rule fitted with lines variously and generally useful in measuring of magnitudes and time. : With several useful apendices for several imployments. As saylors, surveyors, gunners, and gaugers, &c. By John Browne