Shadows cast by sun, [229]-[252].

Sha"ows ca"st "y artificial light, [252].

Sight, Point of, [12], [15].

Sistine Chapel, [60].

Solid figures, [135]-[140].

Square in Angular Perspective, [105], [106], [109], [112], [114], [121], [122], [123], [133], [134], [139].

Sq"are and diagonals, [125], [138], [139], [141].

Sq"are of the hypotenuse (fig. 170), [149].

Sq"are in Parallel Perspective, [42], [43], [50], [53], [54].

Sq"are at 45°, [64]-[66].