Softness indicated by shading, [102], [123]
Solar spectrum, the, [38]
Solids as flat copy, [84]
Spanish school, the, [62]
Straight lines indicative of strength, [148]
Straight lines and flat tones, analogy between, [209]
Strong light in contrast with dark shadow, [206]
Study of drawing, the, [80]
Stump, the, [54]
Style, [288]