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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 127

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 127
6) Otherwise: Takeany convenient point, as C,and set off equal distances pon each side of it, in thelmeofCA,toDandD. Setoff the same distances fromC, in the line of CB, to E andE. Through C, set out aparallel to DE, or DE, andset stakes at the points Fand F where this parallelintersects AE and… … CUAP. V.J Obsiacles to Measurement. 121 The easiest method of settmg out the parallel in the above case,is to fix the middle of the chain at the pomt C, and its ends on thehnes CD, CE; then carry the middle of the chain from C towardsF, and mark the point to which it reaches; and repeat this on…

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