A text-book on shades and shadows, and perspective (1900)
Hill, John Edward, 1864- · New York, J. Wiley & Sons; [etc., etc.] · leaf 118
between 6 and6 corresponding to the zone 6 on the sphere (§ 119). PIat,e XII, Fig. 50a, gives the proper shading lines on acircular cylinder, axis parallel to <9. Z. C. . .. D, with corre- SHADING. lOI spending shading lines, is for H projection and E . . . . F, wifhcorresponding shading lines,…
Shades and shadows · Perspective
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