The young trigonometer's new guide [electronic resource] : containing The Elements of Plain and Spherical Trigonometry, deduced from the Principles of the Sphere in a Method entirely new; with the Analogies for solving all Cases, and Varieties of Triangles in every Way hitherto invented; with their Application to Practice. Together with The Principles of Fluxionary Trigonometry fully explained and exemplified in many useful Problems. also The Laws and Rules of the Stereographic Projection of the Sphere explained, and applied to the Delineation and Solution of Spherical Triangles, and the Construction of Maps and Dials. Illustrated by four copper-plates. By B. Martin.