PROLEGOMENA AND GENERAL INTRODUCTION TO THE BOOK ON PAINTING

plans of treatment (112—116).—Different sorts of light (117—118).—Definition of the nature of shadows (119—122).—Of the various kinds of shadows (123—125).—Of the various kinds of light (126—127).—General remarks (128—129).—FIRST BOOK ON LIGHT AND SHADE.—On the nature of light (130—131).—The difference between light and lustre (132—135).—The relations of luminous to illuminated bodies (136). —Experiments on the relation of light and shadow within a room (137—140).—Light and shadow with regard to the position of the eye (141—145).—The law of the incidence of light (146—147).—SECOND BOOK ON LIGHT AND SHADE.—Gradations of strength in the shadows (148—149).—On the intensity of shadows as dependent on the distance from the light (150—152).—On the proportion of light and shadow (153—157).—THIRD BOOK ON LIGHT AND SHADE.—Definition of derived shadow (158—159).—Different sorts of derived shadows (160—162).—On the relation of derived and primary shadow (163—165).—On the shape of derived shadows (166—174).—On the relative intensity of