PHYSIOGRAPHIC DIVISIONS OF THE UNITED STATES.

The article focuses on the physiographic divisions of the U.S. A number of attempts have been made to divide the U.S. into natural or physical units which should be as nearly as possible homogeneous with respect to certain criteria. Recent demands for such a division of the U.S. have come from various sources. Within four weeks such requests came to the U.S. Geological Survey from the Forestry Bureau, the Division of Pomology and from several geographers. In educational work there is constant need of a scheme of natural divisions which may be described or explained as units.