Manual Of The Protracting Trigonometer: With Its Application To Rectilinear Draughting And Plotting,

Originally published in 1828, this practical guide to mathematical techniques was widely used by surveyors and engineers in the 19th century. Josiah Lyman provides clear instructions for using the protracting trigonometer, a tool for measuring angles in triangulation and other surveying applications. The book also includes useful tables and formulas for solving problems in trigonometry.

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