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 314
t, and begin by fixingon it two points, such as C and D, which were on the former sheet,and from them proceed as before. The sheets can then be after-wards united, so that all the points on both shall be in their truerelative positions. (454) Method of Intersection. This is the most usual andthe… … X X the desired points A, B, C, &c., which are visible, and draw inde-finite lines in their directions. Measure any line XY, Y beingone of the points sighted to, and set oflf this Hue on the paper toany scale. Set up at Y, and turn the table tiU the line XY onthe paper lies in the direction of…
Surveying
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