Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 318
i D, 4 s D, 1 c D, 9 0 D, 14 t A 4 f ^ D,% n D, 11 a ^^ D, 15 9 D, 5 I A 8 i D, 12 F D, 15 I D, 5 I Z), 9 m D, 12 E D, 17 A above D, 20 feet. BOOK vrii.] TOPOGRAPHICAL SURVEYING. 311 The first horizontal plane is passed 2 feet above D, and thecurve of intersection with the surface passes through c.… … surface, in the curve uvy and also near d, which is one foot abovethe curve. All the other secant planes are passed at three feetfrom each other; and, comparing the height of each point aboveD, with the curves lying nearest, on either side, the positions ofall the points, with respect to the…
Surveying
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