A treatise on surveying ; in which the theory and practice are fully explained (1860)
Alsop, Samuel · Philadelphia, E. C. & J. Biddle & co. · leaf 283
earings of thelines be LA (Fig. 185) K46° 45 E., AE S. 71°20 E., 24.10 chains, andBM K. 10° 35 E., theland to the north ofAB being estimated at$80 per acre, and that tothe south at $100 peracre. It is required torun a new division line,running due east, so asnot to alter the value ofthe two tracts.… … Bec.L] laying out land. 281 parallel to it, meeting AB in E. Then the division linewill run through E. Demonstration.—AL : FI :: FI : AF; .-. AL : AF :: FIa : AF2; but AB= | AL ; .-. AD : AF :: f FP : AF2 : : f BE2 : AE* : : BEa : f AEa. But AD : AF : : ADB : AFB (1.6) : : ADB : ABC : : BEa : £…
Surveying
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