UNT Libraries Government Documents Department - 15 Matching Results
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- Air-Consumption Parameters for Automatic Mixture Control of Aircraft Engines
- From Introduction: "The purpose of this analysis was to investigate the use of a function of intake-manifold pressure, exhaust back pressure, intake manifold temperature, and engine speed in place of a venturi as a means of measuring engine air consumption and to determine if this function is suitable for automatic mixture control."
- Analyses of Pennsylvania Anthracitic Coals
- Report issued by the Bureau of Mines discussing the anthracite coal fields of Pennsylvania. History, geology, and mining methods of the anthracite fields are presented. This report includes tables, illustrations, and maps.
- Annual Report of Research and Technologic Work on Coal: Fiscal Year 1941
- Report issued by the U.S. Bureau of Mines discussing the annual report over the research and technology of coal during 1941. As stated in the foreword, "these investigations increase our fund of exact knowledge on the properties and composition of American coals and lead to better methods in mining, preparing, storing, and utilizing coal" (p. 4). This report includes tables, illustrations, photographs, and a map.
- Comparative Yields of Light Oil, Tar, and Constituents from Carbonization Tests at 800 Degrees, 900 Degrees, and 1,000 Degrees Celsius
- Report issued by the U.S. Bureau of Mines on testing done on a variety of American coals collected from 32 coal beds across the country. The carbonizing properties of samples tested at 3 different temperatures are presented. This report includes tables, and graphs.
- Flood-Prevention Projects at Pennsylvania Anthracite Mines: A Preliminary Study
- Report issued by the Bureau of Mines over flood-prevention methods at Pennsylvania anthracite mines. The flood-prevention projects are discussed. This report includes tables, maps, photographs, and illustrations.
- Flood-Prevention Projects at Pennsylvania Anthracite Mines: Progress Report for 1945
- Report issued by the Bureau of Mines over studies conducted on flood-prevention developed for mine systems. A history of flood prevention procedures as well as updated flood-prevention is presented. This report includes tables, graphs, maps, photographs, and illustrations.
- Flood-Prevention Projects at Pennsylvania Anthracite Mines: Progress Report for Fiscal Year Ended June 30, 1947
- Report issued by the Bureau of Mines over the progress made on flood prevention in anthracite mines. As stated in the report, "the broad objective of the investigative work was to obtain factual data on: 1. anthracite reserves of Pennsylvania, 2. underground water pools, 3. barrier pillars, 4. the "buried valley" of the Susquehanna River, and 5. infiltration of surface water into underground mine workings" (p. 4). This report includes tables, graphs, maps, photographs, and illustrations.
- Loss of Life Among Wearers of Oxygen Breathing Apparatus
- Report issued by the U.S. Bureau of Mines discussing fatalities of mine workers while wearing self-contained oxygen breathing apparatuses. Descriptions of the circumstances surrounding the deaths of 26 workers are presented. This report includes a table.
- Production of Metallurgical Alumina from Pennsylvania Nodular Diaspore Clays
- From introduction: "This report covers work done and the estimated costs of recovering metallurgical-grade alumina from the clays found in those deposits."
- Radioactivity of Asphaltites, Coals, and Shales in Tennessee, Kentucky, West Virginia, and Pennsylvania
- Report discussing the U.S. Geological Survey's investigation of the radioactivity measurements of asphalltites, coals and shales found in Tennessee, Kentucky, West Virginia, and Pennsylvania.
- Report on reconnaissance surveys in eastern Pennsylvania
- The examination of 3 districts; southeastern Pennsylvania near Chester and Philadelphia, the Williams quarry northeast of Kaston, and the northeastern end of Mt. Pisgah near Mauch Chunk.
- Shorter Contributions to General Geology, 1941-42
- Preface: The author of this paper gives a thorough description of a complex of very unusual igneous rocks and associated hydrothermal deposits.
- Thickness of Bituminous Coal and Lignite Seams Mined in the United States in 1945
- Report issued by the U.S. Bureau of Mines discussing bituminous coal and lignite seams found in the United States. The thickness of seams from several U.S. states is compared, as well as the mining methods employed. This report includes maps, tables, and illustrations.
- Washing Characteristics of the Pittsburgh Coal in a High-Sulfur Area in Greene County, Pennsylvania
- Technical paper issued by the Bureau of Mines over characteristics of Pittsburgh-seam coal in Greene County, Pennsylvania. The characteristics and locations of the coal are presented and discussed. This paper includes tables, maps, and illustrations.
- Water Pools in Pennsylvania Anthracite Mines
- Report issued by the Bureau of Mines discussing water pools that accumulate in Pennsylvania anthracite mines. Factors that lead to underground water pools, and methods for water drainage are presented. This report includes tables, maps, illustrations, and photographs.