PERSPECTIVE.

Let *f* be the level and distance of the eye; and *a* the vertical
plane, as high as a man; let *e* be a man, then I say that on the
plane this will be the distance from the plane to the 2nd man.

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

. . .

Demomstration of perspective by means of a vertical glass plane.

83,

84,

The angle of sight varies with the distance.

86,

87,

Opposite pyramids in juxtaposition.

On simple and complex perspective.

The proper distance of objects from the eye.

91,

eye.

93,

94,

95,

96,

97,

The apparent size of objects defined by calculation.

99,

100,

101,

102,

103,

104,

105,

On natural perspective.

107,

108,