The Civil Engineer's Field-book: Designed for the Use of the Locating Engineer : Containing Tables of Actual Tangents, and Arcs Expressed in Chords of 100 Feet for Every Minute of Intersection, from 0 Degrees to 90 Degrees, from a 1 Degree Curve to a 10 Degree Curve, Inclusive; Also Tables of Formulae Applicable to Railroad Curves and the Location of Frogs : Together with Raii, Long Chords, Grades, Natural Tangents, Natural Sines, Natural Versed Sines, Natural External Secants, Etc. : with Explanatory Problems
Edward Butts
Free