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

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

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.

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 North eliminates the more nervous and active types of mind.

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

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

The buffalo is a surprisingly stupid animal.