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 61
Fig. 50. 10 1 … CALCULATING TEE CONTENT. 47 it and partly out, giving and taking about equal quantities, so that the figurewhich these lines form shall be about equivalent to the curved figure. This Fig. 51.
Surveying
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