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 115
parallel to the contour-lines, as shown in the upper right-handcorner of Fig. 113—a hill drawn by Lehmanns Method. Fig. 113. … FOURTH SYSTEM.(164.) Another Diapason of Tints: 97 Slope. 2i° 5° 10° 15° 25° 35° 45° 60° 75° Black. 1 2 3 4 5 6 V 8 9 White. 10 9 8 V 6 5 4 3 2 This distinguishes gentle slopes better. It makes themdarker, and the steeper slopes lighter, and provides for slopesbeyond 45°. To use this standard, make…
Surveying
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