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

Curiously enough man's body and his mind appear to differ in their climatic adaptations.

For the source of any characteristic so widespread and uniform as this adaptation to environment we must go back to the very beginning of the human race.

We are learning, too, that the love of beauty is one of Nature's greatest healers.

Although farming of any sort was almost as impossible in the plains as in the dry regions of winter rains farther west, the abundance of buffaloes made life much easier in many respects.

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 America the most widespread type of forest is the evergreen coniferous woodland of the north.