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 61
d that the rays descend in an angle from left to right, or vice versa, and the plane of the surface, on which the shadow is to be cast, be so placed as to receive the rays of light at a right angle, or, as it is termed, perpendicularly, and any object is interposed in such a direction, that its…
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.
