104 Matching Results

Search Results

prev Results: 49 - 72 next
open access

A Glossary of the Mining and Mineral Industry

Description: From Introduction: "This glossary is published by the Bureau of Mines as a contribution to the mining literature in the belief that it will fill a long-felt need. It contains about 20,000 terms; these include both technical and purely local terms related to metal mining, coal mining, quarrying, petroleum, and natural gas, and metallurgical works; names of useful, important, and common minerals and rocks; and geological terms. It presents in one comprehensive volume the available standard, techn… more
Date: 1920
Creator: Fay, Albert H.
Partner: UNT Libraries Government Documents Department
open access

Mining and Preparing Domestic Graphite for Crucible Use

Description: From Prefactory Statement: "In this bulletin are presented the results obtained in the first two phases of the work outlined above. The bulletin is in two parts. The first part describes the methods of mining and milling used, suggests a standard method of sampling finished graphite, and describes a rapid and convenient method of analysis developed at the Pittsburgh station of the Bureau of Mines, to which has been assigned the analytical and microscopic work. The second part describes experime… more
Date: 1920
Creator: Dub, George D. & Moses, Frederick G.
Partner: UNT Libraries Government Documents Department
open access

Structure in Paleozoic Bituminous Coals

Description: From Introduction: "To fill in a few of these gaps and to clarify some of the existing confusion is the aim of this paper. The immediate cause that led the author to investigate further the composition of coal and the origin and structure of its constituents was that when an attempt was made to discover the meaning of the coking and noncoking properties of a coal a more exact knowledge of the nature of the coal was required than was then available."
Date: 1920
Creator: Thiessen, Reinhardt
Partner: UNT Libraries Government Documents Department
open access

Educational Agencies in Mining Communities

Description: Report on the importance of industrial education in the mining sector. It explains general education and facilities for specialized education for proficiency in a given field.
Date: April 1920
Creator: Read, Thomas Thornton, 1880-1947
Partner: UNT Libraries Government Documents Department
open access

Operation and Care of Vehicle-Type Batteries

Description: Manual for operation and care of storage batteries for use in Army depots.
Date: June 7, 1920
Creator: Vinal, George W.
Partner: UNT Libraries Government Documents Department
open access

Recovery of Gold from Black Sand Tailings

Description: Report on the recovery of gold from black sand tailings, based on tests conducted at the U.S. Bureau of Mines' Alaska Station.
Date: October 1920
Creator: Gross, John
Partner: UNT Libraries Government Documents Department
open access

The Ultra-Violet and Visible Transmission of Various Colored Glasses

Description: Technical paper issued by the Bureau of Standards over studies conducted on transmissions of ultra-violet energy through different colored glasses. As stated in the introduction, "in the present paper are given the transmissions for the visible and ultra-violet of a large number of glasses, mostly colored, which are not used primarily for eye protection, but which are useful for various other purposes" (p. 3). This paper includes illustrations, and photographs.
Date: March 19, 1920
Creator: Gibson, K. S.; Tyndall, E. P. T. & McNicholas, H. J.
Partner: UNT Libraries Government Documents Department
open access

Efflux of Gases Through Small Orifices

Description: Scientific paper issued by the Bureau of Standards over studies conducted on gas effusion rates. The methods used and the results of the studies are presented and discussed. This paper includes tables, and illustrations.
Date: January 28, 1920
Creator: Buckingham, Edgar & Edwards, Junius David
Partner: UNT Libraries Government Documents Department
open access

A New Interferential Dilatometer

Description: Scientific paper issued by the Bureau of Mines over development of a dilatometer. The instrument is used in tests of thermal expansion. The methods are presented and discussed. This paper includes an illustration.
Date: February 28, 1920
Creator: Priest, Irwin G.
Partner: UNT Libraries Government Documents Department
open access

Annual Report of the National Advisory Committee for Aeronautics (4th). Administrative Report Including Technical Reports Nos. 24 to 50

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, expenditures, problems, recommendations, and a compilation of technical reports produced.
Date: 1920
Partner: UNT Libraries Government Documents Department
open access

Nomenclature for Aeronautics

Description: Report defines the principal terms which have come into use in the development of aeronautics. It was prepared in cooperation with a committee engaged upon a similar undertaking in Great Britain. As a result this nomenclature is in substantial agreement with the one which has been adopted by the aeronautical authorities of Great Britain.
Date: 1920
Partner: UNT Libraries Government Documents Department
open access

Development of Air Speed Nozzles

Description: Report describes the development of a suitable speed nozzle for the first few thousand airplanes made by the United States during the recent war in Europe, and to furnish a basis for more mature instruments in the future. Requirements for the project were to provide a suitable pressure collector for aircraft speed meters and to develop a speed nozzle which would be waterproof, powerful, unaffected by slight pitch and yaw, rugged and easy to manufacture, and uniform in structure and reading, so … more
Date: 1920
Creator: Zahm, A. F.
Partner: UNT Libraries Government Documents Department
open access

Self-Luminous Materials

Description: Report outlines specifications for the preparation and application of self-luminous materials to be used for the illumination of various instruments, especially those used for aeronautics.
Date: 1920
Creator: Dorsey, N. E.
Partner: UNT Libraries Government Documents Department
open access

Aluminum and Its Light Alloys

Description: Report is a summary of research work which has been done here and abroad on the constitution and mechanical properties of the various alloy systems with aluminum.
Date: 1920%
Creator: Merica, Paul D.
Partner: UNT Libraries Government Documents Department
open access

The Strength of One-Piece Solid, Build-Up and Laminated Wood Airplane Wing Beams

Description: The purpose of this report is to summarize the results of all wood airplane wing beams tested to date in the Bureau of Standards Laboratory in order that the various kinds of wood and methods of construction may be compared. All beams tested were of an I section and the majority were somewhat similar in size and cross section to the front wing beam of the Curtiss JN-4 machine. Construction methods may be classed as (1) solid beams cut from solid stock; (2) three-piece beams, built up of three p… more
Date: 1920
Creator: Nelson, John H.
Partner: UNT Libraries Government Documents Department
open access

The Structure of Airplane Fabrics

Description: This report prepared by the Bureau of Standards for the National Advisory Committee for Aeronautics supplies the necessary information regarding the apparatus and methods of testing and inspecting airplane fabrics.
Date: 1920
Creator: Walen, E. Dean
Partner: UNT Libraries Government Documents Department
open access

Fabric Fastenings

Description: The study of aeronautical fabrics has led to a consideration of the best methods of attaching and fastening together such materials. This report presents the results of an investigation upon the proper methods of attaching fabrics to airplane wings. The methods recommended in this report have been adopted by the military services.
Date: 1920
Creator: Walen, E. D. & Fisher, R. T.
Partner: UNT Libraries Government Documents Department
open access

The Efficiency of Small Bearings in Instruments of the Type Used in Aircraft

Description: This report deals with the construction and properties of bearings and pivots for use in instruments. The static and running friction for both thrust and radial loads was determined for a number of conical pivots and cylindrical and ball bearings. The static rocking friction was also measured for several conical and ball bearings under a heavy load, especially to determine their suitability for use in N. P. L. (National Physical Laboratory) type wind tunnel balance.
Date: 1920
Creator: Norton, F. H.
Partner: UNT Libraries Government Documents Department
open access

Performance of a 300-horsepower Hispano-Suiza airplane engine

Description: The National Bureau of Standards tested a 300-horsepower Hispano-Suiza engine to determine the characteristic performance of the engine at various altitudes. The engine was operated at the ground, at 25,000 feet, and at intermediate altitudes, both at full loads similar to those that would be imposed upon the engine at various speeds by a propeller whose normal full-load speed was 1,800 r.p.m. Friction horsepower also was determined in order that the mechanical efficiency of the engine might be… more
Date: May 12, 1920
Creator: Sparrow, S. W. & White, H. S.
Partner: UNT Libraries Government Documents Department
open access

The Testing of Balloon Fabrics

Description: Report describes methods and materials used in waterproofing and fireproofing airplane fabrics using dopes. The determination of the probable life of a balloon fabric in service by experimental means is of great value in choosing the most suitable fabrics for a given purpose and in pointing the way to improvements in compounding and construction. The usefulness of exposure to the weather for this purpose has been amply demonstrated.
Date: 1920
Creator: Edwards, Junius David & Moore, Irwin L.
Partner: UNT Libraries Government Documents Department
open access

The Ferrosilicon Process for the Generation of Hydrogen

Description: Report describes the generation of hydrogen by the reaction between ferrosilicon, sodium hydroxide, and water. This method known as the ferrosilicon method is especially adapted for use in the military field because of the relatively small size and low cost of the generator required to produce hydrogen at a rapid rate, the small operating force required, and the fact that no power is used except the small amount required to operate the stirring and pumping machinery. These advantages make it po… more
Date: 1920
Creator: Weaver, E. R.; Berry, W. M.; Bohnson, V. L. & Gordon, B. D.
Partner: UNT Libraries Government Documents Department
open access

Testing Balloon Gas

Description: Report describes a simple, portable apparatus for testing hydrogen, with special reference to its use in balloons. "In the generation, storage, and use of hydrogen for balloon purposes it is necessary to be able to determine, first, its lifting power, and, secondly, its purity. The lifting power may be determined directly from the specific gravity. Contamination by other gases may be determined by analysis for oxygen, carbon dioxide, etc., by the usual methods of gas analysis" (p. 469).
Date: 1920
Creator: Edwards, Junius David
Partner: UNT Libraries Government Documents Department
open access

A New Process for the Production of Aircraft-Engine Fuels

Description: Report describes experiments conducted on a new method of producing high-grade aviation gasoline at a test laboratory established at Charleston, W. Va. For the National Advisory Committee for Aeronautics.
Date: 1920
Creator: Paris, Auguste Jean, Jr. & Paris, W. Francklyn
Partner: UNT Libraries Government Documents Department
Back to Top of Screen