Imitative art;, or, The means of representing the pictorial appearances of objects, as governed by aerial and linear perspective: : being a manual of details, for the amateur sketcher and the man of business, with a chapter on finish. (1840)
Howard, Frank, 1805-1866, Darton & Clark, publisher, J. Green and Co., printer · London : Darton and Clark, Holborn Hill. · leaf 57
43 CAST SHADOWS. Strong: but when it proceeds from the sun or open day-lightj the shadows are so much modified by the reflection and refraction of the atmosphere, that they appear less strong. Subject to these various influences of different degrees of light, transparent objects throw very slight… … Cast shadows also vary in degree of strength
Drawing · Perspective · Shades and shadows · Surfaces · Drapery in art · Projection
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
