157

On the proportion of light and shade.

A single and distinct luminous body causes stronger relief in the object than a diffused light; as may be seen by comparing one side of a landscape illuminated by the sun, and one overshadowed by clouds, and so illuminated only by the diffused light of the atmosphere.

THIRD BOOK ON LIGHT AND SHADE.

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.

. . .

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,

On the relative intensity of derived shadows.

175,

176,

. . .