A treatise on surveying ; in which the theory and practice are fully explained (1860)
Alsop, Samuel · Philadelphia, E. C. & J. Biddle & co. · leaf 135
K 182 CHAIN SURVEYING. [Chap. IV. and GI equal to CD. Then HIK will be the prolongationof AB. A B … 232. Second Method.—Byequilateral triangles. Let AB(Fig. 95) be the line, theobstacle being at 0. Bysweeping with the chain,describe the equilateral tri-angle BCD. Prolong BDto E sufficiently far to passthe obstacle. Describe theequilateral triangle FEG, and prolong EG till EH = EB.Describe the…
Surveying
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