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.

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.

Technical paper issued by the Bureau of Mines over the salvage of necessary equipment for the oil industry. The types of materials that can be salvaged are presented and discussed. This paper includes photographs, and illustrations.

Technical paper issued by the Bureau of Mines over studies in mine safety and communication. The methods and equipment used in the studies are presented and discussed. This paper includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over experiments in electrical methods. The methods and equipment used are presented and described. This paper includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over tests conducted on ground resistivity with a megger. The results of the tests are presented and discussed. This paper includes tables, and illustrations.

Technical report issued by the U.S. Bureau of Mines discussing the results of investigations studying the effects of alumina composition on the viscosity of iron slag.

Report issued by the Bureau of Mines discussing the thermodynamics of oxygen and nitrogen. Properties of these elements and methods of estimating thermodynamic data are presented. This report includes tables.

Technical paper issued by the Bureau of Mines over mining of red iron ores in Birmingham, Alabama. As stated in the introduction, "the present paper deals more specifically with the development and handling of ore as affected by folds and faults in the ore bed, and considers changes that may be desirable or necessary in future mining practices" (p. 2). This paper includes illustrations, and photographs.

Technical paper issued by the Bureau of Mines over studies conducted on rotary kilns. As stated in the introduction, "the object of this study was to determine the factors that influence the rate of progress of crushed materials through a kiln" (p. 1). This paper includes tables, illustrations, and photographs.

Report containing several articles discussing coal in the state of Virginia. These articles cover geographic deposition of coal, coal production, mining methods, and analyses of coal samples. Index begins on page 71.

Technical paper issued by the Bureau of Mines over the Bowie-Gavin process. As stated in the introduction, "this paper describes a process and an apparatus designed to recover oil from such deposits" (p. 1). The results of experiments conducted using this process are discussed. This paper includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over the development of carbon monoxide alarms and recorders. Descriptions of the recording equipment are presented and discussed. This paper includes tables, photographs, and illustrations.

Technical paper issued by the Bureau of Mines over studies on dust respirators. The development and efficiency of the respirators are discussed. This paper includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over testing conducted on lubricating oils on internal-combustion engines. Results of the tests conducted are presented. This paper includes tables, photographs, and illustrations.

Technical paper issued by the Bureau of Mines over studies on low-temperature carbonization of coal. Methods and equipment used during the studies are discussed. This paper includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over oil-contaminated water. As stated in the introduction, this paper discusses "the development of suitable apparatus for handling and disposing of oil wastes in order to prevent the pollution of navigable waters" (p. 1). This report includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over the use of manganese with iron ore. Different uses of the ore are presented and discussed. This paper includes tables, photographs, and illustrations.

Technical paper issued by the Bureau of Mines over experiments conducted on the back pressure of oil wells. The results of the experiments are presented and discussed. This paper includes tables, photographs, and illustrations.

Technical paper issued by the Bureau of Mines over gas masks developed for gasoline and petroleum vapors. Descriptions of different types of gas masks developed are presented. This paper includes tables, photographs, and illustrations.

Report documenting mining explosives, equipment, and breathing apparatuses approved by the United States Bureau of Mines prior to January 1, 1924.

Technical paper issued by the Bureau of Mines over the use of coking coal as a generator fuel. The results of using coking coal as fuel are presented and discussed. This paper includes tables, and illustrations.

Technical paper issued by the Bureau of Mines over change and wash houses in the Lake Superior area. As stated in the introduction, "this paper, with a few exceptions, presents data acquired in a survey, made by the author, of change houses in the Lake Superior region. All buildings, equipment, and practices were studied with regard for the health and welfare of the miner" (p. 1). This paper includes tables, photographs, and illustrations.

Report issued by the Bureau of Mines discussing fuel recovery from uncondensed vapors. As stated in the introduction, "this paper aims to show the possibility of increasing the gasoline yield from the crude by the recovery of considerable gasoline that is now lost by remaining uncondensed" (p. 1). This report includes tables, illustrations, and photographs.