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.

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.

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.

The whole history of life is a record of cycles.

The coast of British Columbia was one of the three chief centers of aboriginal America.

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