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 453
e distance, but allthe points must be accessible. Let A B be the measured distance.Lay it off on the paper as a h. Set the table up at B, and turn ittill the line l a on the paper coincides with B A on the ground, asin the Method of Progression. Then sight to C, and draw an in-definite line by the… … the point in which the edge of the ruler cuts the line drawn fromB will be the point c on the table. Xext sight to D, and draw anindefinite line. Set up at D, and make the line last drawn pointto 0. Then fix the needle at a or b, and by the alidade, as at thelast station, get a new line back from…
Surveying
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