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

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.

The buffalo is a surprisingly stupid animal.

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

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.

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

Man could not stay there forever. He was bound to spread to new regions, partly because of his innate migratory tendency and partly because of Nature's stern urgency.