Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn · leaf 53
t B, and in like manner deter-mine and plot be ; and so on. Fig. 27 By intersection. Plot one side as a base line.Plot the other corners by the method of intersection, and join these pointsin proper order by straight lines. By resection. Plot one side as a base line. Plot the other corners by the… … fig. 2s to plot d representing a fourth field station D, from which A,B, and C are visible. Place the table over D, level and orient approximately bythe compass. Determine d by resection as follows: Make the FIELD INSTRUMENTS 45 edge of the ruler pass through a and lie in the direction a A,and draw…
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