Home > Field-book for railroad engineers. Containing formulæ for laying out curves, determining frog angles, levelling, calculating earth-work, etc., etc., together with tables of radii, ordinates, deflections, long chords, magnetic variation, logarithms, logarithmic and natural sines, tangents, etc., etc. By John B. Henck ...
Field-book for railroad engineers. Containing formulæ for laying out curves, determining frog angles, levelling, calculating earth-work, etc., etc., together with tables of radii, ordinates, deflections, long chords, magnetic variation, logarithms, logarithmic and natural sines, tangents, etc., etc. By John B. Henck ...
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