The vertical plane is represented by a perpendicular line
and it is imagined as being placed in front of the common point where the
concourse of the pyramid converges. And this plane bears the same relation to
this point as a plane of glass would, upon which you drew the various objects
that you saw through it. And the objects thus drawn would be so much smaller
than the originals as the space between the glass and the eye was smaller than
that between the glass and the objects.
Page 121-122
If the eye be in the middle of a course with two horses
running to their goal along parallel tracks, it will seem to it as if they were
running to meet one another. This, as has been stated, occurs because the
images of the horses which impress themselves upon the eye are moving towards
the centre of the surface of the pupil of the eye.
Page 122
You know that in an
atmosphere of equal density the remotest things seen through it, such as
mountains in consequence of the great quantity of atmosphere between your eye
and them, will appear blue and almost of the same hue as the atmosphere itself
when the sun is in the East. Therefore you should make the building which is
nearest above the wall of its natural colour, but make the more distant ones
less defined and bluer…
Page 140 Arial Perspective Quote
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