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 113
iangles, intowhich the surface is divided, are always measured horizontally. 11.5. Problem. Given the edges h, hi, and ho , to find the solidity • If the ground is divided into rectangles, as is generally done, and one side b«made 27 feet, or some multiple of 27 feet, the contents may be obtained… … Solution. Wlicn the prism is not truncated, we have h = h^ = k^The ordinary mle for the solidity of a prism gives, therefore, S = Ah■^ A X b {h + hi -{- hr,). When the prism is truncated, let ABG-F G H{i\g. 48) represent such a prism, truncated at the top. Throughthe lowest point A of the upper…
Railroad engineering · Ferrovias
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