A journey of four hundred and thirty miles can be made in any part of the United States, but in Turkey it takes as many days.

Thus the races, though alike in their physical response to climate, may possibly be different in their mental response because they have approached America by different paths.

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

It will be a vast boon to mankind when we learn to prophesy the precise dates when cycles of various kinds will reach definite stages.

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.

In fact, the history of North America has been perhaps more profoundly influenced by man's inheritance from his past homes than by the physical features of his present home.

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