A treatise of practical surveying ; which is demonstrated from its first principles : wherein evey thing that is useful and curious in thar art is fully considered and explained ; particulary, four new and very concise methods to determine the areas of right-lined figures arithmetically, or by calculation, as welle as the geometrical ones heretofore treated of ; with two other new geometrical methods much more accurate... also, the method of tracing defaced mearings from the down, or any other survey, very useful to persons who have any property in land... / Robert GIBSON