History in its broadest aspect is a record of man's migrations from one environment to another.

Man could not stay there forever. He was bound to spread to new regions, partly because of his innate migratory tendency and partly because of Nature's stern urgency.

Although mountains may guide migrations, the plains are the regions where people dwell in greatest numbers.

America forms the longest and straightest bone in the earth's skeleton.

Year by year we are learning that in this restless, strenuous American life of ours vacations are essential.

Fertile soil, level plains, easy passage across the mountains, coal, iron, and other metals imbedded in the rocks, and a stimulating climate, all shower their blessings upon man.

The Negro, however, has been tested on an extensive scale.