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

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.

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

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.

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

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.