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 393
aise the rod slowly till a figure comes in sight. If too near to read,and there is no target, use a field-book as target. If the instru-ment is exactly over the peg, measure up to the height of the cross-hairs, as given by the side-screws. 555. Water. A.—A pond too wide to Iti sighted across.… … up the level beyond it, and sight to it as a B. S., and put downthe observation as if it had been taken to the first peg. FORE-SIGHTS. STATIOXS. HEIGHTS. BACK-SIGHTS. e 5-0 74-89 )81-89 \ 50-00 4S-00 3-006-00 53-0054-00 There must be no wind in the direction of the line of level. B.—For leveling…
Surveying
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