. The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing . ? ? ? . I SHADING Practical DraughtsmanDessin Industrie. Dulos cul, \iiiiciH;aiiil and Amouroiix BOOK OF INDUSTRIAL DESIGN. 07 The face, eb, being that on which the cube rests, has no pro-minence, and cannot therefore cast any shadow. It follows, then,that the shadow, as above determined, is all that is apparent. Itis generally represented by a flat, uniform shade, laid on with thebrush, and produced by a gr
. The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing . ? ? ? . I SHADING Practical DraughtsmanDessin Industrie. Dulos cul, \iiiiciH;aiiil and Amouroiix BOOK OF INDUSTRIAL DESIGN. 07 The face, eb, being that on which the cube rests, has no pro-minence, and cannot therefore cast any shadow. It follows, then,that the shadow, as above determined, is all that is apparent. Itis generally represented by a flat, uniform shade, laid on with thebrush, and produced by a greyish wash of China ink. 269. It will be observed that the lines, db and b c, are parallelto the straight lines, D b and b c. This is because these arethemselves parallel to the horizontal plane; for when a line isparallel to a plane (82), its projection on this plane is a line paral-lel to itself; and hence we have this first consequence, that— When a straight line is parallel to the plane of projection, it castsa shadow on the plane, in the form of an equal and parallel straightline. 270. It will also be observed, that the straight lines, D d, B b, C c,which are the shadows cast by the verticals, projected in d, b, andc, are inclined
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