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Ocher and Ochery Earths

Description: Report about ocher or ochery earth, "a natural mineral pigment composed largely of clay permeated with hydrated iron (ferric oxide)" (p. 2). It includes information about the uses of choer, substitutes, artificial ocher, mining and local deposits, import and export of ocher, and related information.
Date: May 1929
Creator: Santmyers, R. M.
Item Type: Report

Bauxite: Float-and-Sink Fractionations and Flotation Experiments

Description: From Introduction: "This report presents the results of an investigation of the physical properties and characteristics of bauxite, with special reference to the possibility of applying commercial methods of concentration to low-grade bauxite."
Date: 1929
Creator: Gandrud, B. W. & De Vaney, Fred D.
Item Type: Report

Coal-Mine Ventilation Factors

Description: Report discussing results from investigations of coal mining ventilation and discussing problems of ventilation in coal mining.
Date: 1929
Creator: Greenwald, H. P. & McElroy, G. E.
Item Type: Report

Coal-Washing Investigations: Methods and Tests

Description: From Introduction: "The investigations described in this bulletin are confined to a study of the washing characteristics of bituminous coals. The washing characteristics of coals from many of the most important coal-producing fields of the Eastern and Central States were examined."
Date: 1929
Creator: Yancey, H. F. & Fraser, Thomas
Item Type: Report

Drilling and Blasting in Metal-Mine Drifts and Crosscuts

Description: From Introduction: "This report shows the results obtained and conclusions drawn from observing the blasting of 108 rounds at 13 mines in six different States. Kinds of rock drills, drill steel, and forms of drill bits are not considered."
Date: 1929
Creator: Gardner, E. D.
Item Type: Report

Factors Governing the Entry of Solutions into Ores During Leaching

Description: Technical paper issued by the Bureau of Mines over studies on the leaching of copper-bearing ores. As stated in the introduction, the "penetration of the leaching medium into the body of the ore particles" (p. 1) is discussed. This paper includes tables, photographs, and illustrations.
Date: 1929
Creator: Sullivan, John D.; Keck, Walter E. & Oldright, George L.
Item Type: Report

Flow of Gases Through Beds of Broken Solids

Description: Report issued by the Bureau of Mines over studies conducted on the effects of vapor flow through beds of broken solids. Methods and results of the studies are presented and discussed. This report includes tables, illustrations, and photographs.
Date: 1929
Creator: Furnas, C. C.
Item Type: Report

Fuel-Efficiency Tests on Batch Oil Stills

Description: From Introduction Need for Tests: "This bulletin presents in condensed form the results of these tests and the deductions made from them. The tests were made at two refineries, designated here at plant 1 and plant 2."
Date: 1929
Creator: Kreisinger, Henry; Argyle, W. R. & Rice, W. E.
Item Type: Report

Graphical Terrane Correction for Gravity Gradient

Description: Technical paper issued by the Bureau of Mines over formula corrections to make up for gravity gradients. The new formulas are presented and discussed in detail. This paper includes tables, and illustrations.
Date: 1929
Creator: Barton, Donald C.
Item Type: Report

Iron Oxide Reduction Equilibria: A Critique from the Standpoint of the Phase Rule and Thermodynamics

Description: Report issued by the Bureau of Mines over studies conducted on iron oxide reduction. As stated in the scope of bulletin, "this bulletin, therefore, presents the properties of the common oxides of iron, their combinations with each other, and the reduction-equilibrium diagrams by which the investigator passes from one to the next; the end point is not pure iron but the carburized iron of the blast furnace, cast iron" (p. 1-2). This report includes tables, and illustrations.
Date: 1929
Creator: Ralston, Oliver C.
Item Type: Report

Metal-Mine Accidents in the United States During the Calendar Year 1927

Description: Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date: 1929
Creator: Adams, William W.
Item Type: Report

Metallurgical Limestone: Problems in Production and Utilization

Description: From Introduction: "The purpose of this report is to cover as completely as possible our present knowledge of the utilization of metallurgical stone and the problems connected with its quarrying or mining and preparation."
Date: 1929
Creator: United States. Bureau of Mines.
Item Type: Report

Methods, Costs, and Safety in Stripping and Mining Coal, Copper Ore, Iron Ore, Bauxite, and Pebble Phosphate

Description: From Extent of Open-Pit Mining and Purpose of this Publication: "Various methods and machines are employed, and costs are low; in fact, costs have to be low because coal and ores command a low price on the market. These factors, together with queries on methods and costs of stripping and the increase in open-pit mining, have justified investigation by the Bureau of Mines for this form of mining and publication of the results in this report."
Date: 1929
Creator: United States. Bureau of Mines.
Item Type: Report

Oxides in Pig Iron: Their Origin and Action in the Steel-Making Process

Description: From Introduction: "In summarizing the evidence in the literature it is apparent that there is general agreement among furnace men on the existence of so-called "bad-iron." It is also evident that the existence of dissolved or occluded gases is not an explanation. The presence of suspended oxides has been proved, and at least one plausible explanation for their formation has been given."
Date: 1929
Creator: Herty, C. H., Jr. & Gaines, J. M., Jr.
Item Type: Report

Petroleum Refinery Statistics: 1927

Description: Report issued by the Bureau of Mines over statistical records kept on petroleum refineries during 1927. Statistical information on different forms of petroleum is discussed. This report includes tables.
Date: 1929
Creator: Hopkins, G. R.
Item Type: Report

Quarry Accidents in the United States During the Calendar Year 1927

Description: Report published by the U.S. Bureau of Mines which is a compilation of accidents in quarries located in the United States with data regarding the number and kinds of accidents as well as information about the mining operations (e.g., number of men employed, kinds of quarries, amount of work performed, etc.).
Date: 1929
Creator: Adams, William W.
Item Type: Report