Perspective, or, The art of drawing what one sees : explained and adapted to the use of those sketching from nature (1872)
Collins, W. H. (William Henry) · London : Longmans, Green · leaf 28
10 PEESPECTIVE DRAWINO. wildest confusion, and yet without jostle or dis¬ turbance. Each one of twenty persons in a room can see as distinctly as if he were alone, and yet the pencils converging on their eyes may have crossed in every conceivable direction. Let us consider a square house, this… … And let e be the position of an eye. As is natural to suppose, only those rays which fall into the eye can affect it, and these must of necessity be limited to the pencil converging on it. Other rays striking out in other directions might meet other eyes, but except those lying within the pencil…
Perspective · Drawing
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