Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 195
ry parts with a Gunters chain, or with a chainand transit, and compute by formula [a], [b], [c], or [d]. 22 SURVEYING. Problem 2. To find the area of a field having any number ofstraight sides. (a) Divide the field into triangles by diagonals; find the area of eachtriangle and take the sum. (b) Run… … Fig. 15. Fig. 16. Problem 3. To find the area of a field having an irregularboundary line. (a) Let AG BCD (Fig. 15) represent a field having a stream AEFGHKB as a boundary line. Run the line AB. From E, F, G, H, andK, prominent points on the bank of the stream, let fall perpendicularsEEf, FFf,…
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