/ · The Notebooks of Leonardo da Vinci

83

Demomstration of perspective by means of a vertical glass plane.

[figure]

OF THE PLANE OF GLASS.

Perspective is nothing else than seeing place [or objects] behind a plane of glass, quite transparent, on the surface of which the objects behind that glass are to be drawn. These can be traced in pyramids to the point in the eye, and these pyramids are intersected on the glass plane.

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

82 * 84
I * III
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Notebooks of Leonoardo da Vinci
II: Linear Perspective.
. . .
63,
64
Proof by experiment.
65,
66
General conclusions.
67
That the contrary is impossible.
68
A parallel case.
69
The function of the eye as explained by the camera obscura.
70,
71
The practice of perspective.
72,
73
Refraction of the rays falling upon the eye.
74,
75
The inversion of the images.
76
The intersection of the rays.
77,
78,
79,
80,
81,
82
Demomstration of perspective by means of a vertical glass plane.
83,
84,
85
The angle of sight varies with the distance.
86,
87,
88
Opposite pyramids in juxtaposition.
89
On simple and complex perspective.
90
The proper distance of objects from the eye.
91,
92
eye.
93,
94,
95,
96,
97,
98
The apparent size of objects defined by calculation.
99,
100,
101,
102,
103
. . .