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Excerpt from An Introduction Tobthe Theory and Practice of Plane and Spherical Trigonometry, and the Stereographic Projection of the Sphere: Including the Theory of Navigation; Comprehending a Variety of Rules, Formulae, &C. With Their Practical Applications to the Mensuration of Heights and Distances; To Determining the Latitude by Two Altitudes of the Sun
The demonstrations are frequently founded on principl strictly Geometrical, especially where those principles can rendered very plain and perspicuous by the assistance of simp diagrams; and, sometimes the process of demonstration conducted by algebraical signs, particularly where the metrical method would require a complicated figure, or a lo and tedious process.
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