The whole history of life is a record of cycles.

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

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.

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

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.

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