A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 458
R KINDS OF WORK. 44Y which must be set to grade in advance of the pavement. In stakingout retaining walls, pits for foundations, etc., stakes should be setat a certain height above the fundamental lines of the plan, and soarranged that cords may be drawn from one to another, giving themain outlines… … piling of earth or building materials, etc. It is much easier andmore accurate for the surveyor to plumb down from considerableheights, with his transit, than it is for the mechanic to do so with aplumb line, especially when the points to be transferred verticallyare difficult of access. Street…
Surveying
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