On the philosophy of painting: a theoretical and practical treatise.. (1849)
Twining, Henry · London : Longman, Brown, Green, and Longmans · leaf 387
e the observer to be placed with hiseye exactly opposite the top corner, B, of a square pictureB C D E, Fig. 3, and at a distance equal to its width ;in which case, a line, /, drawn from his eye to thefurther corner of the picture, C, would meet the horizonat an angle of 45° from the nearest corner…
Painting · Aesthetics · Perspective
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
