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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 345

An illustration from 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, leaf 345
ections of the twoother sides running from Aand from B. On the ground or platproduce the two convergingsides to meet at some pointE. Calculate the contentof the triangle ABE. Measure the side AE. From ABE subtractthe area to be cut off, and the remainder will be the content of thetriangle CDE. From… … (512) When the field and the dividing line are given by Bearings, produce the sides as in the last article. Find all the anglesfrom the Bearings. Calculate the content of the triangle ABE, bythe formula for one side and its including angles. Take the cuAP. n.] Parting off Land; 339 desii-ed content…

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