Technical Report Archive & Image Library (TRAIL) - 356 Matching Results
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- Mine Workings Under a Part of the Southeast Section of the City of Scranton
- Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.
- Mine Workings Under a Part of the Southeast Section of the City of Scranton
- Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.
- Mine Workings Under a Part of the West Section of the City of Scranton
- Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.
- Mining Conditions Under the City of Scranton, Pennsylvania
- Bulletin issued by the U.S. Bureau of Mines regarding the conditions of the mines beneath the city of Scranton, Pennsylvania, including suggestions about methods to continue excavating coal while preserving the structural integrity of the city's foundation.
- The Mining Districts of the Western United States
- From introduction: This is the most current attempt to locate all the mining districts of the western states.
- North Dakota Lignite as a Fuel for Power-Plant Boilers
- From Introduction: "The tests described in the following report were made by the United States Geological Survey in cooperation with the United States Reclamation Service, which, in connection with its Williston project, had erected a large pumping plant at Williston, N. Dak., and had installed steam boilers with furnaces designed to burn a "brown lignite" that was mined on adjacent government land. The results of the tests made at Williston, set forth in this report, show that this fuel, through generally considered unsatisfactory, may be used with fair economy under boilers that generate their full rated capacity."
- Notes on Mineral Wastes
- From Introduction Need of Preventing Mineral Waste: "The purpose of the Bureau of Mines in publishing this report is to call attention to some of the present waste, in the hope that knowledge of the facts may lead to an increased desire to eradicate the wastes, and to greater interest in careful, practical and scientific investigations, through which only can they be overcome."
- The Smoke Problem at Boiler Plants, A Preliminary Report
- Report concerning the rise in the usage of coal and the growing pollution of coal smoke. Includes the ordinances of several cities that arose to combat this pollution.
- 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."
- 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 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 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 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."
- Washing and Coking Tests of Coal at the Fuel-Testing Plant at the Fuel Testing Plant, Denver, Colo., July 1, 1908, to June 30, 1909
- From Introduction: "This bulletin deals with washing and coking tests of coal made at the Government fuel-testing plant in Denver, Colo., between July 1, 1908, and June 30, 1909."
- Revision of the Spiny Pocket Mice: (Genera Heteromys and Liomys)
- From introduction: "Result of a study of the spiny pocket mice in the collection of the Biological Survey, now numbering nearly 1,000 specimens, supplemented by about 130 in the United States National Museum and from various sources."
- A Biological Survey of Colorado
- From introduction: "Report based chiefly on the field work prosecuted during 1905, 1906, 1907, and 1909. It is primarily a characterization of the several major distribution areas or life zones."
- 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."
- Alaskan Coal Problems
- Report discussing coal problems existing in Alaska, which Alaskan coal has high value.
- Apparatus and Methods for the Sampling and Analysis of Furnace Gases
- From Introduction: "It is the purpose of this paper to describe some apparatus and methods which have proved satisfactory to those engaged in the chemical work of the investigations mentioned. While these methods and apparatus have been designed more particularly with regard to analysis of furnace gases, their use is by no means limited to that purpose."
- Binders for Coal Briquets: Investigations Made at the Fuel-Testing Plant, St. Louis, Missouri
- From Introduction: "The problem is always to produce at a profit a briquet of satisfactory grade for the use intended. This problem will be made clearer by a brief summary of the available binders, followed by a preliminary discussion of the characteristics of a good briquet."
- Briquetting Tests at the United States Fuel-Testing Plant, Norfolk, Virginia, 1907-8
- From Briquetting Tests: "The briquetting work undertaken at Norfolk had these specific objects: 1. To determine what percent of pitch or other binder was necessary to make a satisfactory briquet out of the coals tested. 2. To investigate the relative merits of different binders. 3. To provide briquets for comparative combustion tests of run-of-mine coal and the same coal briquetted."
- Coals Available for the Manufacture of Illuminating Gas
- From Introduction General Statement: "The investigations were so directed as to permit the testing of coals from different parts of the united States. The results show that certain coals from which good yields of gas had been expected can not be considered as available for illuminating-gas manufacture, whereas other coals give promise and should investigated further. The data contained in this report are the outcome of the cooperative work at the laboratory mentioned during parts of the years 1908 and 1909."
- Commercial Deductions from Comparisons of Gasoline and Alcohol Tests on Internal-Combustion Engines
- From Introduction: "The following report is a summary of the commercial results which were obtained from 2,000 tests conducted by technologic branch of the United States Geological Survey at St. Louis, Mo., and Norfolk, Va., in 1907 and 1908, under the technical supervision of R.H. Fernald, engineer in charge of the producer-gas section."
- Comparative Tests of Run-of-Mine and Briquetted Coal on Locomotives
- From Introduction: "For purpose of procuring data that could be using in estimating the value of the briquetting process as applied to American fuels, the United States Geological Survey, in cooperation with other interests, began in 1904, at the Louisiana Purchase Exposition, certain experiments involving the production and use of bituminous-coal briquets."
- Comparative Tests of Run-of-Mine and Briquetted Coal on the Torpedo Boat Biddle
- From Introduction: "With the particular equipment used in the tests both coal and briquets were far from smokeless; consequently the data of this bulletin are applicable only by analogy to parallel operation with a coal more nearly smokeless, but nevertheless applicable with much reliability. It was the original intention to make a set of preliminary steaming tests alongside a dock (which tests furnish material for this bulletin) an to finish with a set of running tests at sea; but the running tests were never made. for lack of time and men."
- Coupled Circuits in Which the Secondary has Distributed Inductance and Capacity
- Report issued by the Bureau of Standards over studies conducted on coupled circuits. Emphasis was placed on the secondary circuit and its inductance and capacity. The results of the studies are presented and discussed. This report includes illustrations.
- The Determination of the Constants of Instrument Transformers
- Report issued by the Bureau of Standards over studies on instrument transformers. As stated in the first paragraph, "the principle of the method here described is the same for both current and potential transformers, being an application of the potentiometer method" (p. 281). The methods and equipment studied are presented and discussed.
- The Effect of Oxygen in Coal
- From Introduction: "This paper is the result of a comparative study of ultimate coal analyses made and published by the United States Geological Survey. The initial comparisons, made from a relatively small number of analyses, not only confirmed a previous conviction that the elimination of oxygen incident to the development of a coal is economically far more important than has been generally suspected, but also showed that oxygen is very nearly as harmful as ash in coal."
- The Electrical Conductivity of Commercial Copper
- Report issued by the Bureau of Standards over the conductivity of copper. Samples of commercial copper were studied, and the results are presented and discussed. This report includes tables, illustrations, and photographs.
- Essential Factors in the Formation of Producer Gas
- From Introduction Scope and Purpose of Inquiry: "The Bureau of Mines, to which the testing and analyzing of fuels as carried on by the United States Geographical Survey has been transferred, is continuing producer-gas investigations at the testing station at Pittsburgh, Pa. Results of the gas-producer tests made at the coal-testing plant erected at St.Louis, Mo., and of a study of some of the problems that came up in the tests have been published by Geological Survey. Results of the tests made at Norfolk, Va., and Pittsburgh, Pa. and of further studies of particular problems, will be published by the Bureau of Mines."
- Experimental Work Conducted in the Chemical Laboratory of the United States Fuel-Testing Plant at St. Louis, Missouri, January 1, 1905, to July 31, 1906.
- From Introduction: "This report therefore covers all such work up to its completion in July, 1906. In the following pages the results of each line of experimental work are given under a special heading indicating the object of the investigation."
- The Explosibility of Coal Dust
- "This bulletin traces the growth in the belief in the explosibility of coal dust, summarizes the experiments and mine investigations that have established this belief, and gives the present status of preventive measures" (p. 9). Index begins on page 201.
- Features of Producer-Gas Power-Plant Development in Europe
- From Introduction: "Because the limited time available would not permit a careful inspection, much less a detailed study of all the plants visited, the writer has not aimed in this bulletin to present a comprehensive review of producer-gas power-plant development in Europe, or even to give such conclusions as might be drawn from what he saw, but has simply described some interesting features of European practice that attract the attention of even a casual observer."
- The Flow of Heat Through Furnace Walls
- From Introduction: "This bulletin contains a statement of certain results that will be embodied in a report describing investigations of the combustion of fuel made by the United States Geological Survey and the Bureau of Mines in a specially constructed long furnace."
- Geology and Ore Deposits of the Breckenridge District, Colorado
- Study of the geology and ore deposits of the Breckenridge District in Colorado.
- Incidental Problems in Gas-Producer Tests
- From Introduction: "In the course of this study many incidental problems of prime importance have demanded consideration. Among them is the determination, under practically constant conditions, of the duration of gas-producer tests necessary to reduce the possible error to minimum. A discussion of this proper length of test period forms the part of this bulletin."
- Mineral Resources of the Llano-Burnet Region, Texas with an Account of the Pre-Cambrian Geology
- The following report examines the mineral resources and geologic relations of the pre-Cambrian rocks and the associated iron ores in the Llano-Burnet region, Texas.
- A Modified Method for the Determination of Relative Wave-Lengths
- Report issued by the Bureau of Standards over developments made to the methods for the determination of relative wave-lengths. The methods developed are discussed. This report includes tables, and illustrations.
- Notes on Explosive Mine Gases and Dusts: With Special Reference to Explosions in the Monongah, Darr, and Naomi Coal Mines
- Report issued by the Bureau of Mines discussing coal mining gas and dust explosions, specifically those at the Monongah, Darr, and Naomi mines of Pennsylvania and West Virginia. Studies on mine explosions, as well as methods and analyses are presented. This report includes tables, and an illustration.
- Platinum Resistance Thermometry at High Temperatures
- Report issued by the Bureau of Standards over platinum resistance thermometry. The advantages and limitations at high temperatures are discussed. This report includes tables, and illustrations.
- A Primer on Explosives for Coal Miners
- From Introduction: "Much of the information in this primer has been obtained from experiments conducted by the technologic branch of the United Sates Geological Survey at the mining experiment station at Pittsburgh, Pa. These investigations have shown the recent development of a new type of short-flame explosives, which can be used with greater safety than black powder in mines where there is dangerous gas or inflammable dust, because the flame from the explosion of black powder lasts from 2,500 to 3,500 times as long does the flame from these newer explosives and is therefore more likely to ignite the gas or dust in such mines."
- Résumé of Producer-Gas Investigations: October 1, 1904-June 30, 1910
- From Scope of Report: "The purpose of this report is, therefore, to present in convenient form all the more important data accumulated in the course of the tests described, in order that the results may be readily accessible both to the Government officials having charge of the design, purchase, or care of power plants and to all persons interested in the development of the internal-combustion engine and the gas producer as means for utilizing the energy of fuels."
- The Significance of Drafts in Steam-Boiler Practice
- Report containing experiments that illustrate the possibility of increasing steam power by increasing the amount of air passing through coal fuel beds and boilers in steam engines.
- 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.
- 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.
- 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 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."
- 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.