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 195
thence twenty-eight chains and eighty linksNorth-Westerly sixty-sixdegrees to a pine stump;thence thirty-three chains and nineteen links South-Westerlytwenty-two degrees to the place of beginning, containing ninety-twoacres, be the same more or less. Required the exact content. y/^ (297)… … Fis. 198. Thus, take any polygon, such as the five-sided one ui the figure. Express the angle whichthe directions of any two sides, as AB, CD, makewith each other, thus (AB^CD). Then willthe content of that polygon be, as below; = J[AB . BC + AB . DE f BC . DE
Surveying
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