54

Experimental proof of the existence of the pyramid of sight.

TO PROVE HOW OBJECTS REACH THE EYE.

If you look at the sun or some other luminous body and then shut your eyes you will see it again inside your eye for a long time. This is evidence that images enter into the eye.

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

53 * 55

I * III

Notebooks of Leonoardo da Vinci

II: Linear Perspective.

. . .

General remarks on perspective.

40,

The elements of perspective--Of the Point.

42,

43,

44,

45,

Of the line.

47,

48,

The nature of the outline.

Definition of Perspective.

Experimental proof of the existence of the pyramid of sight.

52,

53,

The relations of the distance points to the vanishing point.

55,

How to measure the pyramid of vision.

The Production of pyramid of Vision.

58,

59,

60,

61,

62,

63,

Proof by experiment.

65,

General conclusions.

That the contrary is impossible.

A parallel case.

The function of the eye as explained by the camera obscura.

70,

The practice of perspective.

72,

Refraction of the rays falling upon the eye.

. . .