Field-book for railroad engineers. Containing formulas 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 (1877)
Henck, John Benjamin, 1816-1903 · New York : D. Appleton · leaf 84
E Fis to obtain a line parallel to A B, thisline may be dispensed with, if by any other means a line GFhe drawnthrough D parallel to AB. A point G being found on this parallel inthe line of CB, we have, as before, GD = AB. PARABOLIC CURVES. 65 CHAPTER II. PARABOLIC CURVES.Article I. — Locating… … L CD is a diameter of the parabola, and the curve bisects CDinE- II. If from any points T, T, T, &c., on a tangent A F, lines bea.-awn to the curve parallel to the diameter, these lines T M, T M ,1 M &c., called tangent deflections, will be to each other as theBenares of the distances AT, A…
Railroad engineering · Ferrovias
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