A treatise on surveying ; in which the theory and practice are fully explained (1860)
Alsop, Samuel · Philadelphia, E. C. & J. Biddle & co. · leaf 233
ese areas are placed in the above table in the columnsof the same name as the difference of latitudes of the sidesto which they belong. Had the line NS been drawn soas to intersect the plat, some of theareas would have been to the westof it, and some of the multipliersmight have been west. Fig. 161… … iS Sec. IX.] CONTENT OF LAND. 231 But 2 (Ddr — reE) = Dd. dr — Ee . er = Dd .de — Dd. cr— Ee. de + Ee. dr; and since Dd : dr :: Ee : er, Dd. er = Ee dr. 2 (Ddr - reE) = Dd . de - Ee . de = (Dd - Ee) de. Whence 2 ABCDEFG = (Aa + B6) ao + (B6 + Cc) 6c +(Ce + Dd) ed - (Dd - Ee) de - (Ee + /F) e/ + (/F…
Surveying
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