by Willis E. Johnson
Publisher: American Book Company 1907
Number of pages: 346
Contents: The Form of the Earth; The Rotation of the Earth; Longitude and Time; Circumnavigation and Time; The Earth's Revolution; Time and the Calendar; Seasons; Tides; Map Projections; The United States Government Land Survey; Triangulation in Measurement and Survey; The Earth in Space; Historical Sketch.
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by A.S. Walker - U.S. Geological Survey
Contents: What Is a Desert; How the Atmosphere Influences Aridity; Where Deserts Form; Types of Deserts; Desert Features; Eolian Processes; Types of Dunes; Remote Sensing of Arid Lands; Mineral Resources in Deserts; Desertification.
by Lee Botts, Bruce Krushelnicki - EPA
The Great Lakes are an important part of the physical and cultural heritage of North America. Spanning more than 1,200 km, these inland freshwater seas have provided water for consumption, transportation, power, recreation and a host of other uses.
by Louise Huffman, Rita Thomas, Erin Carr, Katia Kontar - ANDRILL
Thinking about going to Antarctica? Here are the steps to a smooth trip if you plan to work in the US Antarctic Program (USAP). First, you have to make sure you are physically ready to endure the harsh conditions of the coldest place on Earth.
by T.C. Hopkins - B. H. Sanborn & Co.
The text aims to assist both teacher and pupil into the spirit of one of the most inspiring subjects in our schools; to bring the pupil into contact with Nature in such a way that he may see his own position in this world of complex activities.