Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn · leaf 52
t both stations. If, however, the line connecting the station at which theinstrument is placed with another station is already plotted,the table may be placed in position accurately by placing itover the station so that the plotted line is by estimation overand in the direction of the line on the… … To plot any Point. Let ab on the paper represent the lineAB on the ground; it is required to plot c, representing C onthe ground. 1. By intersection. Place the table in position at A (Fig. 24), plumbing a over A, andmaking the fiducial edge of theruler pass through a; turn thealidade about a until…
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