154

On the proportion of light and shade.

OF PERSPECTIVE.

The shaded and illuminated sides of opaque objects will display the same proportion of light and darkness as their objects [Footnote 6: The meaning of obbietti (objects) is explained in no 153, lines 1-4.—Between the title-line and the next there is, in the original, a small diagram representing a circle described round a square.].

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

Notebooks of Leonoardo da Vinci

III: Six books on Light and Shade.

. . .

134,

The relations of luminous to illuminated bodies.

Experiments on the relation of light and shadow within a room.

137,

138,

139,

Light and shadow with regard to the position of the eye.

141,

142,

143,

144,

The law of the incidence of light.

146,

Gradations of strength in the shadows.

148,

light.

150,

151,

On the proportion of light and shade.

153,

154,

155,

156,

Definition of derived shadow.

158,

Different sorts of derived shadows.

160,

161,

On the relation of derived and primary shadow.

163,

164,

On the shape of derived shadows.

166,

167,

168,

169,

170,

171,

172,

173,

. . .