Technical Report Archive & Image Library (TRAIL) - 356 Matching Results
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- The Smokeless Combustion of Coal in Boiler Furnaces
- From Introduction: "The present bulletin not only shows that bituminous coals high in volatile matter can be burned without smoke, but also that large plants carrying loads that fluctuate widely, where boilers over banked fires forced to the capacity of their units, can be operated without producing smoke that is objectionable."
- Some American Jurassic Ammonites of the Genera Quenstedticeras, Cardioceras, and Amoeboceras, Family Cardioceratidae
- Introduction: The interpretation of the data furnished by the study of these fossils has been hindered somewhat because the exact stratigraphic location of much of the material is unknown. It was gathered with regard merely for the general stratigraphic and geographic position. However, as a knowledge of the general relationship forms to those of other areas is in itself of value to the stratigrapher and systematist it has seemed desirable to describe and figure the species.
- Some Engineering Problems of the Panama Canal in Their Relation to Geology and Topography
- Report issued by the Bureau of Mines over issues encountered during construction of the Panama Canal. As stated in the introduction, "this report aims to discuss, from the viewpoint of the mining geologist, the bearing of topographic and geologic conditions on certain problems that arose in the construction of the Panama Canal" (p. 7). This report includes tables, maps, illustrations, and photographs.
- Some Mining Districts in Northeastern California and Northwestern Nevada
- From preface: This report satisfies the demand of the public for reliable information and to gather data which should be of use in planning further geologic work in Nevada.
- Special Studies in Electrolysis Mitigation: 4. A Preliminary Report on Electrolysis Mitigation in Elyria, Ohio, with Recommendations for Mitigation
- Technical paper issued by the Bureau of Standards over surveys conducted on the electrical conditions of railway tracks in Elyria, Ohio. The results of the surveys are presented and discussed. This paper includes tables, maps, and illustrations.
- Specific Heat of Copper in the Interval 0⁰ to 50⁰ Celsius with a Note on Vacuum-Jacketed Calorimeters
- Report issued by the Bureau of Standards over studies on the specific heat of copper. The methods and equipment used for the studies are discussed. This report includes tables, photographs, and illustrations.
- Spirit Leveling in Texas 1896 to 1915, Inclusive
- The following report includes all the results of spirit leveling in Texas, rearranged by quadrangles.
- Standard Test Specimens of Zinc Bronze (Cu 88, Sn 10, Zn 2) - Parts 1 and 2: Part 1. - Preparation of Specifications, Part II. - Microstructure
- Technical paper issued by the Bureau of Standards over tests conducted on the preparation of an alloy. The tests conducted, and their results are presented and discussed. This paper includes tables, illustrations, and photographs.
- The Steam-Turbine Expansion Line on the Mollier Diagram, and a Short Method of Finding the Reheat Factor
- Report issued by the Bureau of Standards over the Mollier diagram. The steam-turbine expansion line on the diagram is discussed. This report includes tables, and illustrations.
- Steaming Tests of Coals and Related Investigations: September 1, 1904, to December 31, 1908
- Report issued by the Bureau of Mines over studies conducted on fuel-testing plants. The results of steaming tests on coals are presented and discussed. This report includes tables, illustrations, and photographs.
- The Strength of Reinforced Concrete Beams; Results of Tests of 333 Beams (First Series)
- Report issued by the Bureau of Standards discussing studies conducted on reinforced concrete beams. The strength and behavior of reinforced beams at different time intervals is presented.
- The Stretching of the Fabric and the Deformation of the Envelope in Nonrigid Balloons
- Report presents the performance of fabrics used for the envelopes of airships.
- A Study of the Current Transformer with Particular Reference to Iron Loss
- Report issued by the Bureau of Standards over studies conducted on current transformers. Emphasis is placed on iron loss. The results of the studies are presented and discussed. This report includes tables, and illustrations.
- Suggestions for Improved Methods of Mining Coal on Indian Lands in Oklahoma
- Technical paper issued by the Bureau of Mines over studies of Oklahoma coal mines. As stated in the introduction, "this report describes the systems of mining used, points out their defects, and presents suggestions for improved methods, more especially as regards the applicability of different modifications of the panel system to mining coal in Oklahoma" (p. 5). This paper includes tables, maps, and illustrations.
- The Sunset-Midway Oil Field, California: Part 2. Geochemical Relations of the Oil, Gas, and Water
- Introduction: In the following pages a number of selected analyses or tests of the oil and gas from this field are given, with such descriptions of the analytical methods used as are necessary to an understanding of the results.
- A Systematic Account of the Prairie Dogs
- Discusses distribution, habits, economic status, predators, nomenclature, specimens, and pelages of prairie dogs. Describes, lists locations, and provides a key for species and subspecies.
- A Systematic Synopsis of the Muskrats
- From introduction: "Systematic account of the genus Fiber through study of over 1,000 specimens, chiefly well-prepared skins, accompanied by skulls, together with many odd skulls and skeletons."
- The Technology of Marble Quarrying
- From Preface: "The aim of this bulletin is to present to the marble workers of the United States a concise statement of the most efficient and economical methods now in use for producing and preparing marble. The observations outlined refer chiefly to the methods employed in the quarrying of marble and the conditions that affect successful operation; the structure of marble and its relation to quarry processes; waste through rock imperfections and inefficient quarry methods; and means of eliminating such waste or utilizing it if elimination is impossible."
- Technology of Salt Making in the United States
- Report discussing technology for the production of salt in the United States and also the more important sources of salt in the United States.
- Temperature Measurements in Bessemer and Open-Hearth Practice
- Technical paper issued by the Bureau of Standards over studies conducted on different types of furnaces, specifically the Bessemer and the open-hearth furnace. The results of the studies are presented and discussed. This paper includes tables, and illustrations.
- Temperature-Viscosity Relations in the Ternary System CaO-Al₂O₃-SiO₂
- Technical paper issued by the Bureau of Mines over studies on the relations of temperature-viscosity. The "observations on the temperature-viscosity relations of silicates" (p. 5) are presented and discussed. This report includes tables, and illustrations.
- Temperatures in Spark Plugs Having Steel and Brass Shells
- "Brass has often been assumed superior to steel for spark plug shells because of its greater heat conductivity. The measurements described in this report prove the contrary, showing that the interior of a spark plug having a brass shell is from 50 degrees to 150 degrees c. (90 degrees to 270 degrees f.) hotter than that of a similar steel plug. It is to be concluded that steel is to be preferred to brass for spark plug shells. This report embodies the results of measurements taken of electrodes and a comparison of brass and steel insulators of spark plugs while they were in actual operation" (p. 5).
- Tests of Coal and Briquets as Fuel for House-Heating Boilers
- From Introduction: "Perhaps the most important result obtained is that showing the relative value of different fuels for domestic purposes. From Table 16. on page 39, it is possible by comparison to arrive at the probable value of any fuel in any part of the country. The figures in the table show that with a sectional boiler the effectiveness of different fuels depends on the number of thermal units they contain. A brief summary of the results of this investigation is given on page 41."
- Tests of Permissible Explosives
- From Introduction: "A copy of the test requirements and the names of explosives on the permissible list dated March 1, 1913, are appended to this bulletin. An explosive is considered permissible for use in coal mines when it is similar in all respects to the sample that passed the tests required by the bureau, and when it is used in accordance with the conditions prescribed."
- Tests of Run-of-Mine and Briquetted Coal in a Locomotive Boiler
- From Object of Tests: "The primary object of the tests was to study the relative performances of the two types of briquets and of the coal, with reference to efficiency, tendency to smoke, and the ease with which steam could be kept up, when each of the three varieties of fuel was burned at several rates of combustion. Many secondary objects were in mind, the data concerning which are discussed under "Effect of varying rates of combustion," pages 20-27."
- Theory of an Airplane Encountering Gusts, 2
- Calculations of aerodynamic effects of an airplane encountering gusts are presented.
- Theory of an Airplane Encountering Gusts, 3
- Report presents a new method for solving linear equations developed by Bromwich, which is suited to determine the motion for any particular gust, when the machine started from equilibrium, without the trouble of determining the constants of integration in the complementary function. (author).
- Thermal Expansion of Insulating Materials
- Scientific paper issued by the Bureau of Standards over studies on thermal expansion. Expansivity tests are conducted on many different insulating materials. The results of the tests are discussed. This paper includes tables, photographs, and illustrations.
- Thermoelectric Measurement of Critical Ranges of Pure Iron
- Report issued by the Bureau of Standards over the measurements of critical ranges of pure iron wire. The methods and materials used for the measurements are discussed. This report includes tables, and illustrations.
- The Titaniferous Iron Ores in the United States: Their Composition and Economic Value
- From Introduction: "The summer of 1911 was spent in visiting the principal localities in the United States at which titaniferous iron ores occur, for the purpose making systematic collections of material. The following winter was spent in a study of the collected material in the geological laboratory of the John Hopkins University where the author contained as a Johnston scholar. This report is an account of the results obtained."
- Toluol Recovery
- Technical paper issued by the Bureau of Standards over toluol-recovery, known as light oil. The methods used in the toluol-recovery are presented and discussed. This paper includes tables, and illustrations.
- The Transmission of Heat into Steam Boilers
- Report discussing the results of investigations into the heat-absorbing abilities of the heating surfaces of boilers. Also discusses the laws that determine the rate of heat transfer from furnace gases through metal plates into boiler water and offers suggestions as to how these laws may be applied.
- The Transportation of Débris by Running Water
- Abstract: The primary purpose of the investigation was to learn the laws which control the movement of bed load, and especially to determine how the quantity of load is related to the stream's slope and discharge and to the degree of communication of the débris.
- Traps for Saving Gas at Oil Wells
- Technical paper issued by the Bureau of Mines over the use of gas traps at oil wells. Different types of traps are presented and discussed. This paper includes photographs, and illustrations.
- The Ultra-Violet and Visible Transmission of Eye-Protective Glasses
- Technical paper issued by the Bureau of Standards over studies conducted on the development of protective eye wear. The methods and equipment used are presented and discussed. This paper includes tables, and illustrations.
- Underground Latrines for Mines
- Technical paper issued by the Bureau of Mines over the introduction of underground latrines in mines to increase sanitary conditions. The improvements made by underground latrines are presented and discussed. This paper includes photographs, and illustrations.
- Underground Wastes in Oil and Gas Fields and Methods of Prevention
- Technical paper issued by the Bureau of Mines over the underground wastes of oil and gas in drilling fields. As stated in the introduction, "the writers have endeavored to establish the manner and importance of underground waste by citing a few cases and to show the means whereby it can be prevented" (p. 5). This paper includes illustrations.
- United States Coals Available for Export Trade
- From Introduction: "The purpose of this paper is to describe briefly the general character and commercial quality of some of the coals mined in the United States that reach tidewater shipping ports, and to show in a general way the important characteristics of those coals that by reason of transportation facilities and the situation of the coal fields are most available for export."
- United States Mining Statutes Annotated: Part 1 - Sections and Statutes Relating to Metalliferous and Coal Mining
- Report issued by the Bureau of Mines over the mining statutes for metalliferous and coal mining. The statutes are presented and discussed in detail.
- United States Mining Statutes Annotated: Part 2- Miscellaneous Mining Subjects
- Report issued by the Bureau of Mines over mining statutes in the United States. Different laws are presented and discussed according to the state in which they apply.
- The Upper Cretaceous and Eocene floras of South Carolina and Georgia
- Introduction: the following report is the first systematic account of fossil plants from the state of South Carolina.
- The Use of Mud-Laden Fluid in Oil and Gas Wells
- From Introduction: "Technical Paper 66 deals with the mud-laden fluid process in general and No. 68 with its application in Oklahoma. Rather than reprint these publications, it has been considered advisable to replace them with the present report, which includes the results of more recent investigations. The methods of using mud-laden fluid are an outgrowth of the rotary drilling system, which was developed in Texas and later employed in Louisiana and California."
- The Use of Permissible Explosives
- From Preface: "The present bulletin is printed as a supplement to Bulletin 17 and is intended primarily for coal miners, especially for those working in fields where inflammable gas or coal dust may cause disastrous mine explosions. The bulletin is issued by the Bureau of Mines in the hope that it may prove helpful in lessening accidents due to the use of explosives, and in particular may aid in preventing mine explosions, many of which have been caused by the use of improper explosives."
- The Use of Permissible Explosives in the Coal Mines of Illinois
- From Introduction: "The report deals briefly with the dangers of black blasting powder now in such common use in coal mining. It discusses the development of permissible explosives and their introduction into Illinois coal mines and points out the characteristic differences between permissible explosives and black blasting powder. "
- The Uses of Peat for Fuel and Other Purposes
- From Introduction: "The bulletin sets forth the results of an investigation that was undertaken to determine whether peat, a fuel widely used in some countries, could be made serviceable in the United States, where, through labor and economic conditions differ from those in peat-using countries, there are opportunities for the introduction of a fuel selling at prices that should make the mining and shipment of peat to near-by markets profitable."
- The Utilization of Fuel in Locomotive Practice
- Report that investigates the possibility of conserving coal despite its extensive use in railroad locomotives across the United States. Includes an experiment using different grades of coal in an approximation of a locomotive, as well as data regarding fuel utilization and loss.
- The Vapor Pressure of Arsenic Trioxide
- Technical paper issued by the Bureau of Mines over investigations of vapor pressure. The methods and equipment used for the investigations are presented. The results are discussed. This paper includes tables, illustrations, and photographs.
- The Variation of Yawing Moment Due to Rolling
- The aerodynamical constants of an airplane necessary for the discussion of stability are partly observed and partly calculated. Among the calculated coefficients is n(p), which is the variation of yawing moment due to rolling. (author).
- The Volatile Matter of Coal
- From Introduction Scope of Report: "This bulletin is a report on an investigation of the volatile matter in several typical coals-its composition and amount at different temperatures of volatilization. As the investigation is still in progress and will doubtless include other coals than those already examined, the bulletin may be considered a preliminary report, stating the problems studied, the methods used, and the results thus far obtained."
- War Gas Investigations: Advance Chapter from Bulletin 178, War Work of the Bureau of Mines
- From General Statement: "Beginning with an investigation to develop the best type of gas mask, the scope of the work extended until it included researches relating to a wide range of devices, such as different types of poisonous and irritating gases and smokes, smoke screens, gas shells and gas bombs, signal lights, and incendiary bombs. When the results obtained through this research were to be applied by the War Department, the Director of the Bureau of Mines cooperated in the selection of men to have charge of manufacture or further development, recommending chemists who subsequently received commissions in the Army. Perhaps the greatest result of the research work has been the demonstration of the value of the services that the chemist and chemical engineer can render in time of need and the recognition of chemical investigations as a necessary function of the Government."