A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 271
be-cause the supplement of the former, EPA, equals the supplement of the lat-ter, since it is measured by the same arc as the angle ABE, equal to thatsupplement by construction. So too with the angle D QP. 256 LAND-SUR VEYIXG. Calculation. To obtain P Q = E F — EP — QF, we proceed to findthose… … E B and B 0, and the angle EBC=ABC— A BE; whence E C and theangle E0B are fonnd. In the triangle EOF are known EC, FC, and theangle ECF=BCD — ECB — FCD; whence we find E F, and the anglesCEFandCFE. In the triangle BE P, we have E B, the angle BEP = BEC + CEP,and the angle BPE = BPA + APE; to find E…
Surveying
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