ried to the distance O R of the lines A F, B F; so that there is the difference C O and R D. It follows that the line C F, and the line D F, in order to become shorter[1], have to go and find the paper where the whole height is drawn, that is to say, the lines F A, and F B, where the true size is; and so it makes the difference, as I have said, of C O, and R D.
Chap. CCCXLVIII.—Why the most perfect Imitation of Nature will not appear to have the same Relief as Nature itself.
If nature is seen with two eyes, it will be impossible to imitate it upon a picture so as to appear with the same relief, though the lines, the lights, shades, and colour, be perfectly imitated[2]. It is proved thus: let the eyes A B, look at the object C, with the concurrence of both the central visual rays A C
