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January 1, 1889

Formulas and tables to facilitate the construction and use of maps

No abstract available.

Authors

Robert Simpson Woodward

January 1, 1889

Fossil wood and lignite of the Potomac formation

No abstract available.

Authors

Frank Hall Knowlton

January 1, 1889

I.-Subaerial Deposits of the Arid Region of North America

The subaërial deposits now accumulating in the arid portion of the United States may be divided into four classes: 1, Eolian Sands; 2, Talus Slopes; 3, Alluvial Cones; and 4, Calcareous Clays to which no specific name has been applied, but which, for reasons stated below, will be called “adobe” in this paper.

Authors

Israel C. Russell

January 1, 1889

Instructions to rain-fall observers of U.S. Geological Survey

In the prosecution of the general "survey of the arid lands for purposes of irrigation," authorized by Congress to be undertaken by the U. S. Geological Survey, a determination of the amount of water supplied by the natural rain and snow fall in different localities is of fundamental importance. To obtain this knowledge the Geological Survey must depend in large measure upon the residents, to whom

Authors

Water Resources Mission Area

January 1, 1889