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Quarry Accidents in the United States During the Calendar Year 1940

Description: Report published by the U.S. Bureau of Mines which is a compilation of accidents in quarries located in the United States with data regarding the number and kinds of accidents as well as information about the mining operations (e.g., number of men employed, kinds of quarries, amount of work performed, etc.).
Date: 1942
Creator: Adams, William W. & Wrenn, Virginia E.
Partner: UNT Libraries Government Documents Department
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Coal-Mine Accidents in the United States, 1940

Description: Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date: 1942
Creator: Adams, William W.; Geyer, L. E. & Parry, M. G.
Partner: UNT Libraries Government Documents Department
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Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1940 (Excluding Coal Mines)

Description: Report published by the U.S. Bureau of Mines regarding accidents at mines located in the United States for all operations except coal mines. The report includes statistics about the number and kinds of accidents as well as information about the mining operations (i.e., number of persons employed, average amount of work performed per person, etc.).
Date: 1942
Creator: Adams, W. W. & Kolhos, M. E.
Partner: UNT Libraries Government Documents Department
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Seismic Effects of Quarry Blasting

Description: From Object of Bulletin: "The object of this bulletin is to review briefly the previous publications so that the reader may follow the progress of the research and to supply the technical details supporting the conclusions reached."
Date: 1942
Creator: Thoenen, J. R. & Windes, S. L.
Partner: UNT Libraries Government Documents Department
open access

Coal-Mine Accidents in the United States, 1939

Description: Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date: 1942
Creator: Adams, William W.; Geyer, L. E. & Parry, M. G.
Partner: UNT Libraries Government Documents Department
open access

Plastic and Swelling Properties of Bituminous Coking Coals

Description: From Introduction: "A critical review of the numerous test methods that have been devised for measuring the "plastic" and "swelling" properties of bituminous coking coals and the practical evaluation of the data obtained has long been needed."
Date: 1942
Creator: Brewer, R. E.
Partner: UNT Libraries Government Documents Department
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Typical Analyses of Coals of the United States

Description: From Introduction: "This paper presents a summary, in tabular form, of the composition of commercial coal resources of the country."
Date: 1942
Creator: Fieldner, A. C.; Rice, W. E. & Moran, H. E.
Partner: UNT Libraries Government Documents Department
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Sponge Chromium

Description: From Introduction: "There follows discussion of the reduction processes suitable for preparing sponge chromium from the chlorides, and finally the question of special methods required to insure the production of a high-purity product is investigated. This order is a natural and chronological one as well as being suited to the needs of presenting an analytic picture of the experimental work and its results and proposals engendered."
Date: 1942
Creator: Maier, C. G.
Partner: UNT Libraries Government Documents Department
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Investigations of Permissible Electric Mine Lamps, 1930-40

Description: From Introduction: "This bulletin presents the Bureau's test requirements and procedure relative to permissible electric mine lamps and describes briefly the lamps, giving tabulated details of each."
Date: 1942
Creator: Ilsley, L. C.; Hooker, A. B. & Roadstrum, W. H.
Partner: UNT Libraries Government Documents Department
open access

United States Earthquakes 1942

Description: Report discussing earthquake activity in the United States during 1942. The report is broken down by regions and has sections for specific earthquakes.
Date: 1942
Partner: UNT Libraries Government Documents Department
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Experimental Investigation of a New Type of Low-Drag Wing-Nacelle Combination

Description: Report discusses the results of an experimental investigation of two low-drag wing-nacelle units suitable for use with pusher propellers. The benefits of adding a nacelle to the wing are detailed.
Date: July 1942
Creator: Allen, H. Julian & Frick, Charles W., Jr.
Partner: UNT Libraries Government Documents Department
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Tests of a Heated Low-Drag Airfoil

Description: Report discusses the results of an experimental investigation into the NACA 65,2-016 heated wing. Information about the effect of heating on the drag coefficients, Reynolds numbers, and stability of the laminar boundary layer.
Date: December 1942
Creator: Frick, Charles W., Jr. & McCullough, George B.
Partner: UNT Libraries Government Documents Department
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A Profile-Drag Investigation in Flight on an Experimental Fighter-Type Airplane the North American XP-51

Description: Report discussing the results of an investigation of the North American XP-51 and its low-drag airfoils. Several surface conditions were tested and the profile-drag coefficients were determined. The surface that was smoothened and faired by filling and sanding had the lowest profile-drag coefficient.
Date: November 1942
Creator: Zalovcik, John A.
Partner: UNT Libraries Government Documents Department
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Normal-pressure tests of rectangular plates

Description: From Summary: "Normal-pressure tests were made of 56 rectangular plates with clamped edges and of 5 plats with freely supported edges. Pressure was applied and the center deflection and the permanent set at the center were measured. For some of the plates, strains and contours were measured in addition."
Date: June 1942
Creator: Ramberg, Walter; McPherson, Albert E. & Levy, Samuel
Partner: UNT Libraries Government Documents Department
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A Preliminary Investigation of the Electrical Structure of Thunderstorms

Description: Note presenting a study of the electrical charge structure of thunderstorms by the use of continuously synchronized records of the electrical-potential gradient at the surface of the earth under the influence of active storms.
Date: July 1942
Creator: Workman, E. J. & Holzer, R. E.
Partner: UNT Libraries Government Documents Department
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Strength tests of thin-walled elliptic duralumin cylinders in pure bending and in combined pure bending and torsion

Description: An analysis is presented of the results of tests made by the Massachusetts Institute of Technology and by the National Advisory Committee for Aeronautics on an investigation of the strength of thin-walled circular and elliptic cylinders in pure bending and in combined torsion and bending. In each of the loading conditions, the bending moments were applied in the plane of the major axis of the ellipse.
Date: June 1942
Creator: Lundquist, Eugene E. & Stowell, Elbridge Z.
Partner: UNT Libraries Government Documents Department
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Design of Tools for Press-Countersinking or Dimpling 0.040-Inch-Thick 24S-T Sheet

Description: "A set of dimpling tools was designed for 0.040-inch 24S-T sheet and flush-type rivets 1/8 inch in diameter with 100 degree countersunk heads. The dimples produced under different conditions of pressure, sheet thickness, and drill diameter are presented as cross-sectional photographs magnified 20 times. The most satisfactory values for the dimpling tools were found to be: maximum punch diameter, 0.231 inch; maximum die diameter, 0.223 inch; maximum mandrel diameter, 0.128 inch; dimple angle, 10… more
Date: August 1942
Creator: Templin, R. L. & Fogwell, J. W.
Partner: UNT Libraries Government Documents Department
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A Method for Determining the Camber and Twist of a Surface to Support a Given Distribution of Lift

Description: "A graphical method is described for finding the shape (camber and twist) of an airfoil having an arbitrary distribution of lift. The method consists in replacing the lifting surface and its wake with an equivalent arrangement of vortices and in finding the associated vertical velocities. By a division of the vortex pattern into circular strips concentric about the downwash point instead of into the usual rectangular strips, the lifting surface is reduced for each downwash point to an equivalen… more
Date: August 1942
Creator: Cohen, Doris
Partner: UNT Libraries Government Documents Department
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Effect of rivet and spot-weld spacing on the strength of axially loaded sheet-stringer panels of 24S-T aluminum alloy

Description: Report presenting testing of eighteen 24S-T aluminum alloy sheet-stringer panels in end compression under carefully controlled edge conditions. Results regarding the strains, deflections, failure, and buckling of the sheet are provided.
Date: August 1942
Creator: Levy, Samuel; McPherson, Albert E. & Ramberg, Walter
Partner: UNT Libraries Government Documents Department
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Improvement of Fatigue Life of an Aluminum Alloy by Overstressing

Description: "Fatigue tests were made on some 1.375-inch-diameter and 0.300-inch diameter specimens of a 17S-T aluminum alloy rod. One test of a large specimen was run continuously to failure at a maximum stress of 22,000 pounds per square inch. In two other tests of large specimens, thin surface layers were removed periodically until failure occurred. The same nominal maximum stress of 22,000 pounds per square inch was used throughout the two tests and the load on the fatigue machine was lowered accordingl… more
Date: August 1942
Creator: Stickley, G. W.
Partner: UNT Libraries Government Documents Department
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A comparison of the results from general tank tests of 1/6- and 1/12-full-size models of the British Singapore IIC flying boat

Description: From Summary: "A 1/6-full-size model of the hull of the British Singapore IIC flying boat was tested in the NACA tank. The results are given in the form of charts and are compared with the results of previous tests made in the NACA tank of a 1/12-full-size model, published in NACA T.N. No. 580, and with the results of tests made in the British R.A.E. tank of another 1/6-full-size model of the same hull. When the data from the tests of the 1/6- and 1/12-full-size models were compared on the basi… more
Date: August 1942
Creator: Truscott, Starr & Dawson, John R.
Partner: UNT Libraries Government Documents Department
open access

On the Distribution of Stress in a Thin Plate Elastically Supported Along Two Edges at Loads Beyond the Stability Limit

Description: Note presenting the results of an investigation on the distribution of stress in a plate elastically supported along two edges and subjected to compressive loads in a direction parallel to the elastically supported edges. A theoretical calculation was carried out in which the influence of the elastic support was taken into account.
Date: October 1942
Creator: Dunn, Louis G.
Partner: UNT Libraries Government Documents Department
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Tensile and Pack Compressive Tests of Some Sheets of Aluminum Alloy, 1025 Carbon Steel, and Chromium-Nickel Steel

Description: "Tensile and compressive stress-strain curves, stress-deviation curves, and secant modulus-stress curves are given for longitudinal and transverse specimens of 17S-T, 24S-T, and 24S-RT aluminum-alloy sheet in thicknesses from 0.032 to 0.081 inch, 1025 carbon steel sheet in thicknesses of 0.054 and 0.120 inch, and chromium-nickel steel sheet in thicknesses form 0.020 to 0.0275 inch. Significant differences were found between the tensile and the compressive stress-strain curves, and also the corr… more
Date: February 1942
Creator: Atchison, C. S. & Miller, James A.
Partner: UNT Libraries Government Documents Department
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