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 sent pain and decay to the lands whose day was done, life and vigour to those whose day was yet to be.

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.

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

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

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.

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

The buffalo is a surprisingly stupid animal.