/ · The Notebooks of Leonardo da Vinci

127

Of the various kinds of light.

[figure][figure]

How there are 2 different kinds of light; one being called diffused, the other restricted. The diffused is that which freely illuminates objects. The restricted is that which being admitted through an opening or window illuminates them on that side only.

[Footnote: At the spot marked A in the first diagram Leonardo wrote lume costretto (restricted light). At the spot B on the second diagram he wrote lume libero (diffused light).]

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

126 * 128
II * IV
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Notebooks of Leonoardo da Vinci
III: Six books on Light and Shade.
. . .
Prolegomena.
110
Scheme of the books on Light and shade.
111
Different principles and plans of treatment.
112,
113,
114,
115,
116
Different sorts of light.
117,
118
Definition of the nature of shadows.
119,
120,
121,
122
Of the various kinds of shadows..
123,
124,
125
Of the various kinds of light.
126,
127
General remarks.
128,
129
On the nature of light.
130,
131
The difference between light and lustre.
132,
133,
134,
135
The relations of luminous to illuminated bodies.
136
Experiments on the relation of light and shadow within a room.
137,
138,
139,
140
Light and shadow with regard to the position of the eye.
141,
142,
143,
144,
145
The law of the incidence of light.
146,
147
. . .