The doctrine of plain and spherical trigonometry [electronic resource] : with its application and use in the following parts of mathematicks; Viz. I. Navigation in all its Kinds; as Plain Sailing, Mercator's Sailing, Middle Latitude, and Parallel Sailing. II. Astronomy; wherein all the Problems relating to the Doctrine of the Sphere are solved. III. Projection of the Sphere in Plano. IV. Geography. V. Fortification. VI. Mensuration of Heights and Distances, both accessible and inaccessible. Vii. Dialling, Arithmetical and Instrumental, on all sorts of Planes. By William Hawney, Author of The Compleat Measurer.