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 124
(198) By transversals. Set a stake, C,in the alinement of BA; a second, D, at anyconvenient point; a third, E, in the line CD;and a fourth, F, at the intersection of thealinements of DA and EB. Measure AC,CE, ED, DF and FA. Then is . ^ ^ AC X AF X DE ~ CE X DP — AF X DE* If the point E be taken in… … DF — AF If the point F be taken in the middle of AD, then AB = ACx DECE —DE The minus signs must be interpreted as in Art. (174). (199) By liariuonic division. Set ^ ^^^ Brakes, C and D, on each side of A, and80 that the three are in the same straightfine. Set a third stake at any point, E,of the…
Surveying
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