A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart (1875)
Gillespie, W. M. (William Mitchell), 1816-1868 · New York, D. Appleton · leaf 354
set out on the ground and thestraight fence be then ranged from 3 to 5 The work may be done on the ground more accurately by run-ning a guess line, AC, Fig. 361, across the bends of the fence whichcrooks from A to B, measuring offsets to the bends on each sideof the guess line, and calculating… … Bide, divide the difference of the areas by half of AC, and set itoff at right angles to AC, from A to D. DC -will then be a lineparting off the same quantity of land as did the crooked fence. Ifthe fence at A was not perpendicular to AC, but oblique, as AE,then from D run a parallel to AC, meeting…
Surveying
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