A treatise on levelling, topography, and higher surveying (1876)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, b. 1840, ed · New York, D. Appleton and company · leaf 112
as may be obtained as in L. S. (74) and(124). This method is used to get the cubic contents of a hillto be cut away; of a hollow to be filled up; of a great reser-voir in a valley, either only projected, or full of water, etc. (154.) Sections by Oblique Planes. This method was muchused by the old… … Fig. 110 represents an oval hill by this system (156.) Sketching Ground by this System. This is rapid andeffective, but not precise. In doing this, hold the book tocorrespond with your position on the ground, and always drawtoward you. If at the top of a hill, begin by drawing linesfrom the bottom,…
Surveying
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