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

##