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A Scale-Model Experiment of the Crater Produced Through Terrain of Randomly Varying Elevation by Row Charges

Description: Abstract: "A scale-model experiment was made to check the application of charge spacing rules developed from earlier studies to terrain of randomly varying elevation. Since a prominent possible peacetime use of nuclear explosives is the excavation of a trans-Isthmian canal, the model used was a portion of such a route. The experiment resulted in nearly the desired linear crater dimensions; the spacing rules developed for level trerain give a satisfactory channel when applied to terrain with elevations varying in random fashion."
Date: November 1962
Creator: Vortman, Luke J.
Partner: UNT Libraries Government Documents Department

Determination of Total X-Ray Beam Energy With a Calibrated Ionization Chamber

Description: From Abstract: "This report describes the use of an air-filled aluminum-alloy ionization chamber to determine the energy transported by a bremsstrahlung beam with maximum photon energy in the range 6 to 170 Mev. This report can be used to construct a replica chamber to determine its absolute calibration between 6 and 170 Mev under a variety of experimental conditions."
Date: June 5, 1962
Creator: Pruitt, John S. & Domen, Steve R.
Partner: UNT Libraries Government Documents Department

Investigations of Detonators and Electric Detonators

Description: From Introduction: "The conclusions are given in this bulletin, which is published by the Bureau of Mines as one of the series of publications dealing with the testing of explosives and the precautions that should be taken to increase safety and efficiency in the use of explosives in mining operations. The results of the experiments described in this bulletin show that the average percentage of failures of explosives to detonate was increased more than 20 per cent when the lower grades of electric detonators were used in instead of No. 6 electric detonators, and was increased more than 50 percent when these lower grades were used instead of No. 8 electric detonators."
Date: 1913
Creator: Hall, Clarence & Howell, Spencer P.
Partner: UNT Libraries Government Documents Department

The Flow of Heat Through Furnace Walls

Description: 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."
Date: 1911
Creator: Ray, Walter T. & Kreisinger, Henry
Partner: UNT Libraries Government Documents Department

The Isosynthesis

Description: From Preface: "The paper contains data on the development of the catalyst for the isosynthesis, on the effect of temperature and pressure of operation, and on the composition of the products of the reaction. In the last section, experimental evidence and speculations concerning the mechanisms of the isosynthesis are discussed."
Date: 1950
Creator: Pichler, Helmut & Ziesecke, Karl-Heinz
Partner: UNT Libraries Government Documents Department

Operation of Experimental Plant for Producing Alumina from Anorthosite

Description: From Preface: "This Bulletin provides a permanent record of the operation of an experimental alumina plant by the Bureau of Mines at Laramine, Wyo. The broad purpose of this experimental program was to appraise the technologic and economic feasibility of producing aluminum from nonbauxitic ores."
Date: 1959
Creator: St. Clair, Hillary W.; Elkins, Douglas A.; Shibler, Bertram K.; Mahan, Warren M.; Merritt, Robert C.; Howcroft, Mark R. et al.
Partner: UNT Libraries Government Documents Department

Liquid-Oxygen Explosives

Description: From Introduction: "The purpose of this bulletin is to examine the advantages and disadvantages of L. O. X., both in the light of experimental investigations by the Bureau of Mines and the results in actual blasting, and to discuss the probable future fields of usefulness for this novel type of explosive."
Date: 1932
Creator: Perrott, G. St. J. & Tolch, N. A.
Partner: UNT Libraries Government Documents Department

Limits of Flammability of Gases and Vapors

Description: From Definitions: "This bulletin presents the results of a critical review of all figures published on the limits of flammability if combustible gases and vapors when admixed with air, oxygen,or other "atmosphere."
Date: 1952
Creator: Coward, H. F. & Jones, G. W.
Partner: UNT Libraries Government Documents Department

Transient Behavior of a Natural-Circulation Loop Operating Near The Thermodynamic Critical Point

Description: From Introduction: "Interest in utilizing natural-circulation loops to obtain results that aid in the design of some boiler and nuclear reactor coolant systems has focused attention on the dynamic behavior of such loops. Much analytical and experimental work has been done so as to permit predictions of the transient behavior of both single-phase and two-phase neutral-circulation systems. The analytical portion of the study consisted of simulating the loop by utilizing a digital computer to predict the measured transients."
Date: May 1963
Creator: Harden, Darrel G.
Partner: UNT Libraries Government Documents Department

Limits of Inflammability of Gases and Vapors

Description: From Definitions: "It is the object of this paper to present the results of a critical review of all figures published on the limits of inflammability of combustible gases and vapors when in admixture with air, oxygen, or other "atmosphere." Suspended dusts and liquid mists are not considered."
Date: 1931
Creator: Coward, H. F. & Jones, G. W.
Partner: UNT Libraries Government Documents Department

Evaporation Loss of Petroleum in the Mid-Continent Field

Description: From Introduction: "The results of the investigation, as presented in this report, indicate that loses from evaporation are so large that they should receive serious consideration at once by the industry, which should make every endeavor to reduce them to a minimum."
Date: 1922
Creator: Wiggins, J. H.
Partner: UNT Libraries Government Documents Department

Experimental Production of Alloy Steels

Description: From Introduction and Reason For Undertaking the Work: "The Bureau of Mines has recently made up experimental heats of alloy steels for the Army and Navy. The Bureau of Mines has analyzed the Army steels for its own guidance only, for analysis of the steels for the arsenal was also scheduled to be made by the arsenal, though it was not, as it happened."
Date: 1922
Creator: Gillett, H. W. & Mack, E. L.
Partner: UNT Libraries Government Documents Department

Electrodeposition of Gold and Silver from Cyanide Solutions

Description: From Introduction: "This report on the electrodeposition of gold and silver from cyanide solutions represents work that has occupied my time at intervals during the past 20 years, The investigations has been carried on simultaneously with my duties as professor of mining and metallurgy of the University of California."
Date: 1919
Creator: Christy, S. B.
Partner: UNT Libraries Government Documents Department

Innovations in the Metallurgy of Lead

Description: From Introduction: "The data reported in this bulletin are largely the result of experiments conducted by the Salt Lake City station of the Bureau of Mines in cooperation with the department of metallurgical research of the University of Utah. The work on the lead is the only one of the phases of the investigations carried on at that station during the years 1914 to 1916."
Date: 1918
Creator: Lyon, Dorsey A. & Ralston, Oliver C.
Partner: UNT Libraries Government Documents Department

Melting Brass in a Rocking Electric Furnace

Description: From Object of Report: "The object of this paper is to set forth in detail the possibilities and limitations of a rocking electric brass furnace. The general problem of electric brass furnaces is discussed and various types of furnaces are compared only so far as is necessary for the purpose of this report."
Date: 1918
Creator: Gillett, H. W. & Rhoads, A. E.
Partner: UNT Libraries Government Documents Department

Abnormal grain growth in M-252 and S-816 alloys

Description: Report discussing an experimental investigation was carried out on air- and vacuum-melted M-252 and S-816 alloys to find conditions of heating and hot-working which resulted in abnormal grain growth. The experiments were mainly limited to normal conditions of heating for hot-working and heat treatment and normal temperatures of solution treatment were used to allow grain growth after susceptibility to abnormal grain growth was developed by various experimental conditions. Results indicated that small reductions of essentially strain-free metal were the basic cause of such grain growth.
Date: November 1957
Creator: Decker, R. F.; Rush, A. I.; Dano, A. G. & Freeman, J. W.
Partner: UNT Libraries Government Documents Department

Additional comparisons between computed and measured transonic drag-rise coefficients at zero lift for wing-body-tail configurations

Description: From Introduction: "This report makes further comparisons of the theoretical computing method with available experimental results, showing effects of wing plan-form changes, and the effect of an airfoil-section change on a wing of given plan form."
Date: August 15, 1955
Creator: Holdaway, George H.
Partner: UNT Libraries Government Documents Department

Air-flow characteristics of brazed and rolled wire filter cloth for transpiration-cooled afterburners

Description: From Introduction: "Because of variation in the static-pressure drop across the porous material and in the cooling air required along the length of afterburner combustion chambers, a prescribed distribution of permeability is usually necessary. However, as a preliminary investigation, this report is concerned only with the attainment of uniform permeability. The results of an experimental investigation, conducted at the NACA Lewis laboratory, to determine the permeabilities of five thick meshes of wire filter cloth are presented herein."
Date: October 26, 1953
Creator: Koffel, William K.
Partner: UNT Libraries Government Documents Department

Air reactions to objects moving at rates above the velocity of sound with application to the air propeller

Description: From Discussion: "To meet these unusual conditions three sets of ball-bearings were employed and arranged in tandem, thereby reducing their speeds by the ratio of the number of sets used, as shown in Fig.3. This proved to be a complete success. The results obtained in experiments with a two-blade, 4 foot propeller of series 2, are given in Fig. 9."
Date: November 1922
Creator: Reed, S. Albert
Partner: UNT Libraries Government Documents Department