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 34
C, as shown by the lowerpart of the figure. Then drawby this edge the desired line paral-lel to the given hne. (40) Perpendiculars, These may be drawn by the variouaproblems given in Geometry, but more readily by a triangle whichhas one i-ight angle. Place the longestside of the triangle on the…
Surveying
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