From Introduction: "The present bulletin presents analyses and descriptions of samples collected during the fiscal years 1916 to 1919. In order that the material in this bulletin may be used to supplement that presented in Bulletins 22, 85, and 123, the same plan of geographical classification has been followed, the analyses and descriptions of the samples being grouped in alphabetical order according to the State, country, and town near which the mines or prospects sampled are situated."
From Introduction: "The Bureau of Mines has studied apparatus and procedure for the distillation analysis of petroleum, and this report is presented as a record of developments up to the present time. The work is incomplete, but the extensive information that has been obtained to date is made available as a guide in handling laboratory distillation problems."
From Introduction: "Part of I of this paper cover the engineering and economic side of the industry; the other phases of the investigation which have been under the direction of G. St. J. Perrott, of the Pittsburg station of the United States Bureau of Mines, are discussed in Part II."
Report issued by the Bureau of Mines over experiments conducted on coal-dust explosions. The results of the experiments are presented and discussed. This report includes tables, illustrations, and photographs.
Report issued by the U.S. Bureau of Mines on the air quality in metal-mines after using wet drills. Dust samples are collected and compared to samples collected from similar metal-mines in South Africa and Australia. This report includes tables.
Report discussing 1) the pertinent information available on what electric furnaces can do to assist prospective users in selecting a furnace that fits their requirements and 2) the gradual evolution of the present commercial types of electric furnaces. Also discusses some of the fundamental principles in the design, construction, and operation of electric furnaces.
Report issued by the Bureau of Mines discussing the use of electric furnaces for melting brass, and other nonferrous alloys. Monetary benefits, health benefits, and other advantages of using electric furnaces are presented. Descriptions of furnaces and their operational methods are also presented. This report includes tables, illustrations, and photographs.
From Introduction: "The results of the investigation, as presented in this report, indicate that loses from evaporation are so large that they should receive serious consideration at once by the industry, which should make every endeavor to reduce them to a minimum."
From Introduction and Reason For Undertaking the Work: "The Bureau of Mines has recently made up experimental heats of alloy steels for the Army and Navy. The Bureau of Mines has analyzed the Army steels for its own guidance only, for analysis of the steels for the arsenal was also scheduled to be made by the arsenal, though it was not, as it happened."
From Introduction: "Information concerning the fusibility of coal ash has become of considerable value to the consumer of coals, mainly in connection with the troublesome formation of clinker from the melting of the ash constituents of the burning coal. It is hoped that this information when used together with the large number of coal analyses published by the bureau will assist the consumer of coal in comparing different coals, and in selecting the coal best adapted for his purpose."
On the night of June 8, 1917, the flame of a carbide lamp accident set fire to the uncovered and frayed insulation of an armored power cable near the 2,400-foot level of the North Butte Mining Co.'s Granite Mountain shaft. How this insulation accidentally became exposed is explained on page 15. The following pages present an attempt to draw some practical conclusions and suggestions from this disaster."
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.
Report issued by the U.S. Bureau of Mines discussing studies conducted on the development of the oil-shale industry from a historical, technical, and economic perspective. Results of the studies are presented. This report includes tables, illustrations, and photographs.
Technical paper issued by the Bureau of Mines over studies of coal tars. As stated in the introduction, "this paper discusses the uses to which some of the various tars are put and shows briefly the usual methods of working up tar into some of its simple or easily prepared derivatives, for which a market can generally be found" (p. 5). This paper includes tables, illustrations, and photographs.
From Introduction: "Part I of this paper discusses briefly some of the features of oil and gas accumulation and describes certain oil-field rocks and minerals. Part II deals with the kinds of tools that should be used and the information necessary for selecting proper tools. Part III discusses the accurate testing of strata for oil or gas and states principles based on conditions that have frequently existed in well drilling."
Technical paper issued by the Bureau of Mines over progress made for thawing gravel in placer mines. Different thawing tests are presented and discussed. This paper includes tables, photographs, and illustrations.
Report issued by the U.S. Bureau of Mines on the possibilities of increasing fuel production from crude oil. Methods of recovering oil that is lost by remaining uncondensed are presented. This report includes tables, graphs, and illustrations.
Technical paper issued by the Bureau of Mines over shaft sinking safety. Safe mechanical equipment and procedures are discussed. This paper includes illustrations.
From Introduction: "The purpose of this bulletin is to point out the most efficient methods and equipment now in use in slate quarries, to describe methods of utilizing the quarried material to best advantage, and to outline means of reducing the proportion of waste, which is now excessive."
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