Field-book for railroad engineers. : Containing formul for laying out curves, determining frog angles, levelling, calculating earth-work, etc., etc., together with tables of radii, ordinates, delections, long chords, logarithms, logarithmic and natural sines, tangents, etc., etc. / By John B. Henck 1885 [LeatherBound]
John B. (John Benjamin) Henck
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