48

Of the line.

OF DRAWING OUTLINE.

Consider with the greatest care the form of the outlines of every object, and the character of their undulations. And these undulations must be separately studied, as to whether the curves are composed of arched convexities or angular concavities.

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

47 * 49

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.

. . .