A TREATISE ON PRACTICAL SURVEYING; WHICH IS DEMONSTRATED From its First Principles. WHEREIN EVERY THING THAT IS USEFUL AND CURIOUS IS FULLY CONSIDERED AND EXPLAINED. BY ROBERT GIBSON. Revised, Corrected and Adapted to the use of Schools, American Surveyors, &c. BALTIMORE : PUBLISHED BY F. LUCAS, JUN. AND JOSEPH CUSHING. J. Robinson, printer. |