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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.

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Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

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Geology of the Aspen mining district, Colorado, with atlas

Field work in the Aspen district was begun by the writer and Mr. Tower about July 1, 1898, and continued to about December 1 of the same year. The summer months were chiefly spent in the study of the surface, while the fall and early winter were devoted to the investigations of underground phenomena, as shown in mine workings.
Authors
Josiah Edward Spurr

Holyoke folio, Massachusetts-Connecticut

No abstract available.
Authors
Benjamin Kendall Emerson

Instructions for measuring the rate of evaporation from water surfaces

The ·rate of evaporation from water surfaces varies with the temperature of the water, the velocity of the wind at the water surface, and the dryness of the air. Consequently, the rate of evaporation from rivers, lakes, canals, or reservoirs varies widely in different localities and for the same locality in different seasons.
Authors

Irrigation in Mesilla valley, New Mexico

No abstract available.
Authors
F.C. Barker

Irrigation near Bakersfield, California

No abstract available.
Authors
Carl Ewald Grunsky
By
Water Resources Mission Area, California Water Science Center

Irrigation near Fresno, California

No abstract available.
Authors
Carl Ewald Grunsky

Irrigation systems in Texas

No abstract available.
Authors
William Ferguson Hutson
By
Oklahoma-Texas Water Science Center

London folio, Kentucky

No abstract available.
Authors
Marius Robinson Campbell

Map of Alaska showing known gold-bearing rocks with descriptive text containing sketches of the geography, geology, and gold deposits and routes to the gold fields.

No abstract available.
Authors
Samuel Franklin Emmons

New tests of certain pumps and water lifts used in irrigation

No abstract available.
Authors
Ozni Porter Hood

Nineteenth annual report of the United States Geological Survey to the Secretary of the Interior 1897 - 1898: Part I. Director's report, including triangulation and spirit leveling

No abstract available.
Authors
Charles D. Walcott

Nineteenth Annual Report of the United States Geological Survey to the Secretary of the Interior 1897 - 1898: Part VI - Mineral Resources of the United States, 1897, Metallic Products, Coal and Coke

No abstract available.
Authors
Charles D. Walcott