Teacher's manual for Prang's new graded course in drawing for Canadian schools (1901)
Toronto : Gages · leaf 73
erefore, the light should be arranged as far as possible to fall inone direction. The best effects can be obtained in a schoolroom where the light comesin from the left side alone. If the room is lighted from one side and theback, shut off the light from the back and from all but one or two windows… … Fig. u. See Figure n, where simple effects of shade and cast shadows aieexpressed by parallel pencil lines, vertical, horizontal, oblique, curved, asthe case may be. The curvature or the direction of a shaded or shadowedsurface may be indicated by the direction of the shade and shallow…
Drawing
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