xas on the south.
2. A region beginning at the eastern foothills of the Rocky Mountains and extending westward to the foot of the Sierra Nevada Mountains and the Cascade Mountains in Oregon and Washington.
It comprises an immense territory,
Irrigation by pipe system.
Irrigation by artesian-well system. which includes the park system of the Rockies, culminating in Wyoming, Colorado, New Mexico, and northeast Arizona.
The section contains many mountain systems, the Great Basin of Salt Lake, the great cañon system and plateau of the Colorado, the meadow-lands of Nevada, the northwest Columbia Basin, and the National Park.
3. A region including about onefourth of the territory of California, and divided into two parts —the foothills of the Sierras and the broad, level valley lying between the Sierras and the Coast Range.
In 1900 these divisions taken as a whole contained a population of 9,000,000 people, and over 50,000,000 acres of land under some form of cultivation.