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

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 r….

The buffalo is a surprisingly stupid animal..

As a matter of fact, an ordinary desert supports a much greater variety of plants than does either a forest or a prairie..

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..

From first to last the civilization of America has been bound up with its physical environment..

No part of the world can be truly understood without a knowledge of its garment of vegetation, for this determines not only the nature of the animal ….

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

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 ma….

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

With every throb of the climatic pulse which we have felt in Central Asia,, the centre of civilisation has moved this way and that. Each throb has se….

Geologists are rapidly becoming convinced that the mammals spread from their central Asian point of origin largely because of great variations in cli….

Fertile soil, level plains, easy passage across the mountains, coal, iron, and other metals imbedded in the rocks, and a stimulating climate, all sho….

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

The human organism inherits so delicate an adjustment to climate that, in spite of man's boasted ability to live anywhere, the strain of the frozen N….

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

The coast of British Columbia was one of the three chief centers of aboriginal America..

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

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

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

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