The reciprocal effects of colours on objects placed opposite each other (263--271).--Combination of different colours in cast shadows (272).--The effect of colours in the camera obscura (273. 274).--On the colours of derived shadows (275. 276).--On the nature of colours (277. 278).--On gradations in the depth of colours (279. 280).--On the reflection of colours (281--283).--On the use of dark and light colours in painting (284--286).--On the colours of the rainbow (287--288). VI. PERSPECTIVE OF COLOUR AND AERIAL PERSPECTIVE General rules (289--291).--An exceptional case (292).--An experiment (293).--The practice of the Prospettiva de' colori (294).--The rules of aerial perspective (295--297).--On the relative density of the atmosphere (298--299).--On the colour of the atmosphere (300--307). VII. ON THE PROPORTIONS AND ON THE MOVEMENTS OF THE HUMAN FIGURE Preliminary observations (308. 309).--Proportions of the head and face (310--318).--Proportions of the head seen in front (319--321).--Proportions of the foot (322--323).--Relative proportions of the hand and foot (324).--Relative proportions of the foot and of the face (325--327).--Proportions of the leg (328--331).--On the central point of the whole body (332).--The relative proportions of the torso and of the whole figure (333).--The relative proportions of the head and of the torso (334).--The relative proportions of the torso and of the leg (335. 336).--The relative proportions of the torso and of the foot (337).--The proportions of the whole figure (338--341).--The torso from the front and back (342).--Vitruvius' scheme of proportions (343).--The arm and head (344).--Proportions of the arm (345--349).--The movement of the arm (350--354).--The movement of the torso (355--361).--The proportions vary at different ages (362--367).--The movement of the human figure (368--375).--Of walking up and down (375--379).--On the human body in action (380--388).--On hair falling down in curls (389).--On draperies (390--392). VIII. BOTANY FOR PAINTERS, AND ELEMENTS OF LANDSCAPE PAINTING