A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 370
gh theFrench have worked out a scaleof shades corresponding to differ-ent slopes, by means of whichthe surface can be represented toa scale, as with the horizontal andvertical methods. As ordinarily employed, thesteep surfaces are washed in withIndia ink to desired shades, cor-responding to the… … 300 TOPOGRAPHY. effects on undulating surfaces. The vertical system of hacliuresseems to be preferred over the horizontal system, as being easier todraw and less liable to confusion with the details of the map; whilefor bringing out the configuration of a surface in a rapid mannerthe brush is…
Surveying
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