Field-book for Railroad Engineers: Containing Formulae for Laying Out Curves, Determining Frog Angles, Levelling, Calculating Earth-work, Etc., Etc., Together with Tables of Radii, Ordinates, Deflections, Long Chords, Magnetic Variations, Logarithms, Logarithmic and Natural Sines, Tangents, Etc., Etc
John Benjamin Henck
Free