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 123
BD-/ 116 CHAIN SURVEIBG. [part n V (194) By parallels. From A measureAC, in any convenient direction. From apoint D, in the line of BC, measure a lineparallel to CA, to a point E, in the line ofAB. Measure also AE. AC X AE Then is AB DE —AC … (195) By a parallelo^^ram. Set a stake, C,in the line of A and B, and set another stake, D,wherever convenient. With a distance equal toCD, describe from A, an arc on the ground; and,with a distance equal to AC, describe anotherarc from D, intersecting the first arc in E. Or, ^ /ftake AC and CD, so…
Surveying
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