Report issued by the Bureau of Mines discussing a manual written for individuals who use natural gas in the home. As stated in the introduction, "its purpose is to tell about the supply, production, and distribution of natural gas, so that the necessity for preventing waste will be better understood" (p. 1). This report includes a map, illustrations, and photographs.

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.

Report issued by the Bureau of Mines discussing the Brazilian coal industry. Location details and their production levels are presented. This report includes tables, maps, 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.

Report issued by the Bureau of Mines discussing the recovery of waste emulsions in crude-oil storage tanks. As stated in the introduction, this study was undertaken to find a method of recovering a valuable oil from pit-waste emulsion" (p. 2). Detailed recovery methods are presented. This report includes tables, illustrations, and photographs.

Report issued by the Bureau of Mines discussing the coal industry in Brazil. An emphasis is placed on the technological advancements of mining and preparation of coal. This report includes tables, maps, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over microscopy of pulverized ores. As stated in the introduction, "this paper, which deals with the study of pulverized ores and the use of the camera lucida in such work, discusses an investigation undertaken at the Seattle and the Golden mining experiment stations of the Bureau of Mines" (p. 3). This paper includes tables, illustrations, and photographs.

Report issued by the Bureau of Mines discussing the mechanical equipment used in oil and gas wells of the Oklahoma City field. As stated in the introduction, "this paper presents the results of a study devoted chiefly to new equipment that has been developed to meet the requirements of drilling and producing operations in the Oklahoma City field and that has been accepted by drilling contractors and operators" (p. 1). This report includes tables, illustrations, and photographs.

Report issued by the Bureau of Mines discussing mining safety in the Grass Valley mining district. As stated in the introduction, "the purpose of this paper is not to present an outstanding safety record but to show that gold mining can be pursued with the same degree of safety and improvement as any other industry, if and when the management recognizes that it can and must be done" (p. 1). This report includes tables, maps, illustrations, and photographs.

Report issued by the Bureau of Mines discussing the safety and ventilation hazards presented during the construction of the Wawona tunnel in Yosemite National Park. Safety precautions and procedures used during the construction are presented. This report includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over investigations of available coal in Esmeralda County, Nevada. Exploration of the coal deposits is discussed. This paper includes tables, maps, photographs, and illustrations.

Report issued by the Bureau of Mines discussing the occurrence of tuberculosis and silicosis among mine workers of the Tri-State district including Oklahoma, Kansas, and Missouri. Past history of the diseases are presented, as well as the standard means of examination of miners. This report includes a map, tables, illustrations, and photographs.