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 177
-*)-+«i (* + *). … CALCULATING TEE CONTENT. 163 Noting that d4: + d3 = di + ck, we have,Double area of 1234 = I2 (dt + d2) + ls (d2 d3) + k (d3 + dA). Putting this in the form of a rule, we have : Multiply the totallatitude of each station by the algebraic sum of the departures ofthe two adjacent courses. One half of…
Surveying
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