A Treatise of Practical Surveying, which is Demonstrated from Its First Principles: Wherein Every Thing that is Useful and Curious in that Art, is Fully Considered and Explained : Particularly Three New and Very Concise Methods for Determining the Areas of Right-lined Figures, Arithmetically Or by Calculation, as Well as the Geometrical Ones Heretofore Treated of : the Whole Illustrated by Copper-plates