c. 33. General character of such effects as given by Turner. His
expression of falling rain. 261
Sec. 34. Recapitulation of the section. 261
Sec. 35. Sketch of a few of the skies of nature, taken as a whole,
compared with the works of Turner and of the old masters.
Morning on the plains. 262
Sec. 36. Noon with gathering storms. 263
Sec. 37. Sunset in tempest. Serene midnight. 264
Sec. 38. And sunrise on the Alps. 264

CHAPTER V.--Effects of Light rendered by Modern Art.

Sec. 1. Reasons for merely, at present, naming, without examining the
particular effects of light rendered by Turner. 266
Sec. 2. Hopes of the author for assistance in the future investigation
of them. 266

SECTION IV.

OF TRUTH OF EARTH.

CHAPTER I.--Of General Structure.

Sec. 1. First laws of the organization of the earth, and their
importance in art. 270
Sec. 2. The slight attention ordinarily paid to them. Their careful
study by modern artists. 271
Sec. 3. General structure of the earth. The hills are its action, the
plains its rest. 271
Sec. 4. Mountains come out from underneath the plains, and are their
support. 272
Sec. 5. Structure of the plains themselves. Their perfect level, when
deposited by quiet water. 273
Sec. 6. Illustrated by Turner's Marengo. 273
Sec. 7. General divisions of formation resulting from this
arrangement. Plan of investigation. 274

CHAPTER II.--Of the Central Mountains.

Sec. 1. Similar character of the central peaks in all parts of the
world. 275
Sec. 2. Their arrangements in pyramids or wedges, divided by vertical
fissures. 275
Sec. 3. Caus