The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 360
kment, we must deter-mine the half-width (aa^ at the level of the line of collimation ; andin making repeated trials, we have nothing more to do than multi-ply the reading of the level-staff (/*) for the slope by )•, and addthe product to a a for embankments, or subtract it for cuttings, toobtain… … Fig. 2.—Embankment. Take, as an example, fig. 1, which is a cutting. B A = K = 26-2 ft.; A = 2-13 ; >• = 1^; aa=rxBa = r(K + A) = 1^(26-2 -f 213) = 42-5; let the staff be held at /, and suppose the reading to be 6S = A; thenrA = 9-75; and j? =// = aa — rh — 42-5 — 9-75 = 32-75. By measurement…
Architecture · Civil engineering · Science
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