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 99
the height of this sta-tion above the datum plane, by sub-tracting this sight from the height ofthe instrument; for the height of thisstation is 0 C and OC=EC—EO.Thus if EO = 3 413, 0 C = 28.125 —3.413 = 24.712. In like manner, theheights of stations 1, 2, 3, 4, and 5 maybe found, by taking sights… … height of station 0 1 = 28.125 — 3.102 = 25.023, HEIGHTS AND SLOPE STAKES. 81 height of station 2 = 28.125 — 3.827 = 24.298, 3 := 28.125— 4.816 = 23.309, 4 = 28.125 — 6.952 = 21.173,« * 5 = 28.125 — 9.016 = 19.109. Next, set tlie level between stations 7 and 8, and as the height of sta-tion 5 is…
Railroad engineering · Ferrovias
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