Innovations in Copper Leaching Employing Ferric Sulphate-Sulphuric Acid (open access)

Innovations in Copper Leaching Employing Ferric Sulphate-Sulphuric Acid

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.
Object Type: Report
System: The UNT Digital Library
Ventilation of the Large Copper Mines of Arizona (open access)

Ventilation of the Large Copper Mines of Arizona

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.
Object Type: Report
System: The UNT Digital Library
Methods and Costs of Stripping and Mining at the United Verde Open-Pit Mine, Jerome, Arizona (open access)

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

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.
Object Type: Report
System: The UNT Digital Library
The Kaiparowits Region: A Geographic and Geologic Reconnaissance of Part of Utah and Arizona (open access)

The Kaiparowits Region: A Geographic and Geologic Reconnaissance of Part of Utah and Arizona

From introduction: The purposes of this exploration are to determine routes, to locate water holes, and to select areas where detailed geologic study could profitably be undertaken.
Date: 1931
Creator: Gregory, Herbert E. & Moore, Raymond C.
Object Type: Report
System: The UNT Digital Library
Quicksilver (open access)

Quicksilver

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.
Object Type: Report
System: The UNT Digital Library
Procedure of the Purchasing and Supply Departments of the Miami Copper Company, Miami, Arizona (open access)

Procedure of the Purchasing and Supply Departments of the Miami Copper Company, Miami, Arizona

Report issued by the U.S. Bureau of Mines discussing the purchasing procedures documented by the Miami Copper Company in Arizona. Supplies, invoices, discounts, and accounting procedures are described in detail. This report includes tables, and illustrations.
Date: May 1932
Creator: Bishop, Fred L. & Keller, Albert E.
Object Type: Report
System: The UNT Digital Library
Strawberry Culture: Western United States (open access)

Strawberry Culture: Western United States

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 prospective growers. The fundamental principles of the irrigation of strawberries are substantially the same as those of irrigating other crops. Details must necessarily be governed largely by the character of the crop grown. Since strawberries in the humid areas frequently suffer from drought which causes heavy losses in the developing fruit, the information may prove suggestive to many growers in those areas who could install irrigation systems at small expense. This bulletin gives information on soils and their preparation, different training systems, propagation, planting, culture, the leading varieties, harvesting, shipping, and utilization." -- p. ii
Date: 1933
Creator: Darrow, George M. (George McMillan), 1889-
Object Type: Pamphlet
System: The UNT Digital Library
Accounting System and Office-Management Procedure for Medium-Size Metal Mines (open access)

Accounting System and Office-Management Procedure for Medium-Size Metal Mines

Report discussing an accounting system and management of office procedures design for medium-size metal mines, offered by the United States Bureau of Mines, to be more efficient in the mining industry.
Date: 1934
Creator: Keller, Albert E.
Object Type: Report
System: The UNT Digital Library
United States Earthquakes, 1938 (open access)

United States Earthquakes, 1938

Report discussing earthquake activity in the United States during 1938. The report is broken down by regions and has sections for specific earthquakes.
Date: 1938
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Native and Adapted Grasses for Conservation of Soil and Moisture in the Great Plains and Western States (open access)

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

"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, wild rye, hilaria, Sudan grass, bluegrass, panic grasses, dropseed, and needlegrass.
Date: 1939
Creator: Hoover, Max M. (Max Manley), 1895-
Object Type: Pamphlet
System: The UNT Digital Library