By
Willis T. Lee
Late Geologist, U.S. Geological Survey, Washington, D.C., Author of "The Geologic Story of the Rocky Mountain National Park," "The Face of the Earth as Seen from the Air," "Guide Book of the Western United States," (in part), and Other Works on Popular Scientific and Economic Geology

1927

The Chautauqua Press
Chautauqua, New York

TABLE OF CONTENTS