The Civil Engineer's Field-book: Designed for the Use of the Locating Eigineer Containing Tables of Actual Tangents, and Arcs Expressed in Chords of 100 Feet for Every Minute of Intersection, from 0 0 to 90 0, from a 1 0 Curve to a 10 0 Curve, Inclusive; Also Tables of Formulæ Applicable to Railroad Curves and the Location of Frogs ... With Explanatory Problems