Except on their southern borders the great northern forests are not good as a permanent home for man.

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

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.

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.

Except on their southern borders the great northern forests are not good as a permanent home for man.

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

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