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20,205 Matching Results
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Determination of the 14-Mev Li7 (n,n'a)T Cross Section from Sphere Multiplication and Transmission Measurements
By utilizing lithium spherical shell transmission and multiplication measurements, the Li7(n,n'y)Li7 and the He6-production cross sections, it is possible to deduce that the 14-Mev Li (n,n'a)T cross section is 325 ± 75 mb. A spectrum for neutrons degraded in energy between 0 and 12 Mev is also given.
Date:
July 1054
Creator:
Thomas, R. G.
System:
The UNT Digital Library
[Report, July 12, 1868]
Handwritten report describing the sabbath school, its officers, the number of Sabbaths, and other statistical information about the Sabbath school. H. K. Redway was elected secretary of the Sabbath school.
Date:
July 12, 1868
Creator:
Redway, H. K.
System:
The UNT Digital Library
Results of a Biological Reconnoissance of South-Central Idaho
Brief summary of south-central Idaho, including descriptions of subregions, mammals, birds, and reptiles.
Date:
July 30, 1891
Creator:
Merriam, C. Hart & Stejneger, Leonhard
System:
The UNT Digital Library
Genera and Subgenera of Voles and Lemmings
Revision of the genera and subgenera of voles and lemmings with comparison between North American and European.
Date:
July 23, 1896
Creator:
Miller, Gerrit S. (Gerrit Smith), 1869-1956
System:
The UNT Digital Library
Experiments with Furnaces for a Hand-Fired Return Tubular Boiler
Technical paper issued by the Bureau of Mines over tests conducted on hand-fired boiler furnaces. Testing equipment, fuel, and results of the experiments are presented. This paper includes tables, and illustrations.
Date:
July 1914
Creator:
Flagg, Samuel B.; Cook, George C. & Woodman, Forrest E.
System:
The UNT Digital Library
Construction and Operation of a Single-Tube Cracking Furnace for Making Gasoline
Technical paper issued by the Bureau of Mines over the construction of cracking furnaces for gasoline production. Descriptions of the equipment used for construction are presented and discussed. This paper includes photographs.
Date:
July 1915
Creator:
Bowie, C. P.
System:
The UNT Digital Library
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.
Date:
July 1916
Creator:
McMurray, William F. & Lewis, James O.
System:
The UNT Digital Library
Approved Electric Lamps for Miners
From introduction: "The Bureau of Mines calls attention to the dangers of open-flame lamps in any coal mine."
Date:
July 1917
Creator:
Clark, H. H. & Ilsley, L. C.
System:
The UNT Digital Library
Approved Electric Lamps for Miners
Report describing the development of a number of types of lamps for miners that meet the requirements of the Bureau of Mines. Discusses the features and qualities of these lamps in detail.
Date:
July 1917
Creator:
Clark, H. H. & Ilsley, L. C.
System:
The UNT Digital Library
Gypsum Products: Their Preparation and Uses
Technical report issued by the Bureau of Mines over the different uses of gypsum. The sources and uses of gypsum are presented and discussed. This report includes tables, photographs, and illustrations.
Date:
July 1917
Creator:
Stone, Ralph W.
System:
The UNT Digital Library
Effect of Rate of Temperature Change on the Transformations in an Alloy Steel
Scientific paper issued by the Bureau of Standards over studies conducted on the effects of temperature change on alloy steel. The experimental methods used and the results are presented and discussed. This paper includes tables, photographs, and illustrations.
Date:
July 10, 1919
Creator:
Scott, Howard
System:
The UNT Digital Library
Duralumin
Various properties of duralumin as used in aircraft construction are discussed, including the effects of temperature, working, tempering, and strength.
Date:
July 1920
Creator:
Unger, E. & Schmidt, E.
System:
The UNT Digital Library
The Manufacture of Sulphuric Acid in the United States
Report issued by the Bureau of Mines over the production of sulfuric acid. As stated in the introduction, "the present bulletin was prepared to cover the main facts in regard to the industry in this country, including a discussion of the supplies of sulfur-bearing raw materials, the situation of the acid plants, the principal points in regard to manufacturing processes, and the uses of the acid" (p. 2). This report includes tables, illustrations, photographs, and a map.
Date:
July 1920
Creator:
Wells, Arthur Edward & Fogg, Donald E.
System:
The UNT Digital Library
Notes on the Design of Supercharged and Over-dimensioned Aircraft Engines
The author discusses the limited benefits of supercharging motors and some of the factors that make supercharging less beneficial than it initially appears.
Date:
July 1920
Creator:
Schwager, [Otto]
System:
The UNT Digital Library
Static Testing and Proposed Standard Specifications
Static tests fall into two groups, the first of which is designed to load all members of the structure approximately in accordance with the worst loads which they carry in flight, while the second is directed to the testing of specific members which are suspected of weakness and which are difficult to analyze mathematically. The nature of the loading in the second type is different for every different test, but the purpose of the first is defined clearly enough to permit the adoption of some standard set of loading specifications, at least for airplanes of normal design. Here, an attempt is made to carry through an analysis leading to such a standard, the goal being the determination of a load which will simultaneously impose on every member of the airplane structure a stress equal to the worst it will carry in flight.
Date:
July 1920
Creator:
Warner, E. P.
System:
The UNT Digital Library
Theory of Lifting Surfaces
The general basis of the theory of lifting surfaces is discussed. The problem of the flow of a fluid about a lifting surface of infinite span is examined in terms of the existence of vortexes in the current. A general theory of permanent flow is discussed. Formulas for determining the influence of aspect ratio that may be applied to all wings, whatever their plane form, are given.
Date:
July 1920
Creator:
Prandtl, L.
System:
The UNT Digital Library
Abacus for the Reduction of English Measures to the Metric System and Vice Versa
This report presents a description of an abacus with three scales: one for English measures, one for metric measures, and one with the "points of reduction", as well as construction details. There is also a detailed description on how to use the abacus.
Date:
July 1921
Creator:
Tenani, Mario
System:
The UNT Digital Library
The Caproni Seaplane
The Caproni Company recently built a seaplane of unusual design. The main supporting surfaces consisted of three triplanes in tandem, the lower wings being attached to the hull, which was described as providing accommodation for a hundred passengers. On one of the first flights, the seaplane fell into a lake, nose down, and was destroyed. The authors wish to show that this failure could have been predicted.
Date:
July 1921
Creator:
Munk, Max
System:
The UNT Digital Library
The Drawing of Experimental Curves
This report presents a discussion of how to determine the location of a line or surface from experimental data. What we desire to know practically is the number of ordinates required to obtain a certain probable precision in drawing a line or surface.
Date:
July 1921
Creator:
Norton, F. H.
System:
The UNT Digital Library
The Dynamometer Hub for the Testing Propellers and Engines During Flight
The need for a device to measure flight resistance, engine and propeller power, and efficiency during flight grew in proportion to the demand for increased flying capacity in military types of aircraft. Here, a dynamometer hub was inserted between the engine and the propeller. Taken as a whole, the tests that were conducted show that though the dynamometer is a sensitive instrument liable to numerous derangements, it is undeniably useful even in its present form, when handled with care and skill.
Date:
July 1921
Creator:
Enoch, O.
System:
The UNT Digital Library
Flexible Petrol Pipe
Report presenting an examination of flexible piping and some of the difficulties involved in creating satisfactory flexible pipe. The joint used to assist in the flexibility of the pipe is illustrated and described.
Date:
July 1921
Creator:
unknown
System:
The UNT Digital Library
Laboratory Studies of the Trent Process
Report issued by the U.S. Bureau of Mines detailing the laboratory-scale tests of the efficiency of the Trent process in cleaning coal, in which powdered coal, water, and oil is agitated or beaten together to remove impurities. The report includes details in tables detailing the efficiency varying the type and amounts of coal, oil, and water on the process.
Date:
July 1921
Creator:
Perrott, G. St. John & Kinney, Selwyne Perez
System:
The UNT Digital Library
The Problem of Fuel for Aviation Engines
Note presenting the physical properties which may be demanded of fuels for aviation use and the means that may be adopted by the engine manufacturers to properly meet the demands necessitated by the use of the fuel. Some of the factors that must be considered include its composition, the quantity available, the price per heat unit, and the possibility of keeping stocks in aerial ports both at home and abroad.
Date:
July 1921
Creator:
Kutzbach & James, W. S.
System:
The UNT Digital Library
Theory of the ideal windmill
Report presenting the theory of the ideal propeller, which is important for solving the problem of the action of propellers. Several different theories of propeller action are described and compared to determine which ones seem to be the most accurate.
Date:
July 1921
Creator:
Hoff, Wilhelm
System:
The UNT Digital Library