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Innovations in Copper Leaching Employing Ferric Sulphate-Sulphuric Acid

Description: From Introduction: "The Bureau of Mines has attempted to develop a cheap and efficient solvent that would especially meet the requirements of smaller plants. (See Bibliography). A method of producing this solution from sulphurous products and waste liquors was developed by the bureau and tried successfully on a test-plant scale at the Southwest Experiment Station in cooperation with the department of mining and metallurgy, University of Arizona, Tuscon, Ariz."
Date: 1930
Creator: Keyes, Harmon E.
Item Type: Refine your search to only Report
open access

Methods and Costs of Stripping and Mining at the United Verde Open-Pit Mine, Jerome, Arizona

Description: Report issued by the U.S. Bureau of Mines discussing the mining practices and expenses of the United Verde open-pit mine west of Jerome, Arizona. As stated in the introduction, "the purpose of this paper is to present the methods used in developing and operating the mine, and to discuss the problems encountered" (p. 1). This report includes tables, maps, and illustrations.
Date: February 1930
Creator: Alenius, E. M. J.
Item Type: Refine your search to only Report
open access

Native and Adapted Grasses for Conservation of Soil and Moisture in the Great Plains and Western States

Description: "The information given in this bulletin should enable farmers in the Great Plains and Western States to select from the more common species of grasses some one or more suited to their needs [for soil and water conservation]. Common harvesting equipment and farm machinery can be adapted to the proper handling of native grasses. This brings the cost of such work within the means of most farmers." -- p. i. Among the grasses discussed are wheatgrass, buffalo grass, bluestem, grama, Bermuda grass, w… more
Date: 1939
Creator: Hoover, Max M. (Max Manley), 1895-
Item Type: Refine your search to only Pamphlet
open access

Quicksilver

Description: From Introduction: "Material for this report was gathered during the last quarter of 1928 and the first quarter of 1929, when the author visited the quick-silver-producing districts of California, Nevada, Texas, Oregon, Washington and Arizona to view the progress made in recent years and gather material for a comprehensive study of the present-day quicksilver industry of the United States."
Date: 1931
Creator: Schuette, C. N.
Item Type: Refine your search to only Report
open access

Strawberry Culture: Western United States

Description: Revised edition. "This bulletin applies both to the western portions of the United States in which ordinary farm crops are grown largely under irrigation and to western Oregon and Washington where irrigation is not essential for strawberry production but may be profitable. It describes methods practiced in the more important commercial strawberry-growing districts of the West; it aims to aid those persons familiar only with local and perhaps unsatisfactory methods, as well as inexperienced pros… more
Date: 1933
Creator: Darrow, George M. (George McMillan), 1889-
Item Type: Refine your search to only Pamphlet
open access

Ventilation of the Large Copper Mines of Arizona

Description: Introduction: "This bulletin discusses ventilation methods, practices, and costs at 11 large copper mines in Arizona, as obtained by brief personal studies and from supplementary information furnished by the mine managements. These mines were visited from December, 1928, to November, 1929, and the methods and practices in use when visited are described in some detail."
Date: 1930
Creator: McElroy, G. E.
Item Type: Refine your search to only Report
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