## Field-book for Railroad Engineers: Circular and Parabolic Curves, Turnouts, Vertical Curves, Levelling, Computing Earth-work, Transition Curves on New Lines and Applied to Existing Lines, Together with Tables of Radii, Ordinates, Long Chords, Logarithms, Logarithmic and Natural Sines, Tangents, Etc., and a Metric Curve Table (Google eBook) |

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### Common terms and phrases

100 feet chords A C and B C abscissa angle of intersection B F C Bisect calculated central angle centre line chord B F chords A C circular curve common radius common tangent compound curve Cosin Cotang crossing cubic parabola deflection angle denoted distance draw E F K equal equation Example excavation find the angle find the radius formula frog angle F Given the radius grade length main track measure method middle ordinate multiplied outer rail parabola perpendicular plane prism Problem quarter points radii radius of curvature reversed curve right triangle similar triangles Sine solidity Solution straight line Substituting these values subtracting switch-rail Table Tang tangent A C tangent deflection tangent point tion transition curve