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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
 Year: 1940
Shorter Contributions to General Geology, 1936

Shorter Contributions to General Geology, 1936

Date: 1940
Creator: Loughlin, G. F.
Description: From abstract: This report describes four species of Ostreidae from the Upper Cretaceous of the Gulf region. The zones that the species characterize lie either in the upper part of the Austin chalk or in beds of upper Austin age.
Contributing Partner: UNT Libraries Government Documents Department
Report of the Chief of the Forest Service: 1940

Report of the Chief of the Forest Service: 1940

Date: 1940
Creator: United States. Forest Service.
Description: Annual report from the U.S. Department of Agriculture Forest Service describing activities of the organization, expenditures and receipts, and a discussion of other relevant topics for the fiscal year.
Contributing Partner: UNT Libraries Government Documents Department
Report of the Twenty-Ninth National Conference on Weights and Measures, 1939

Report of the Twenty-Ninth National Conference on Weights and Measures, 1939

Date: 1940
Creator: United States. National Bureau of Standards.
Description: Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic heating and the deflection of drops by an obstacle in an air stream in relation to aircraft icing

Aerodynamic heating and the deflection of drops by an obstacle in an air stream in relation to aircraft icing

Date: October 1940
Creator: Kantrowitz, Arthur
Description: Two topics of interest to persons attempting to apply the heat method of preventing ice formation on aircraft are considered. Surfaces moving through air at high speed are shown, both theoretically and experimentally, to be subject to important aerodynamic heating effects that will materially reduce the heat required to prevent ice. Numerical calculations of the path of water drops in an air stream around a circular cylinder are given. From these calculations, information is obtained on the percentage of the swept area cleared of drops.
Contributing Partner: UNT Libraries Government Documents Department
FCC Reports, Volume 6, July 1, 1938 to February 28, 1939

FCC Reports, Volume 6, July 1, 1938 to February 28, 1939

Date: 1940
Creator: United States. Federal Communications Commission.
Description: Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Contributing Partner: UNT Libraries Government Documents Department
Safety Factors in Construction and Ventilation, Wawona Vehicular Tunnel, Yosemite National Park, California

Safety Factors in Construction and Ventilation, Wawona Vehicular Tunnel, Yosemite National Park, California

Date: 1940
Creator: Ash, S. H.
Description: Report issued by the Bureau of Mines discussing the safety and ventilation hazards presented during the construction of the Wawona tunnel in Yosemite National Park. Safety precautions and procedures used during the construction are presented. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
Explosion Hazards in Storage-Battery Rooms

Explosion Hazards in Storage-Battery Rooms

Date: 1940
Creator: Jones, G. W.; Campbell, John; Dillon, R. E. & Benson, O. B.
Description: Report issued by the Bureau of Mines discussing the safety and explosion hazards present in storage-battery rooms. Descriptions of storage-battery rooms and methods of ventilation are presented. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
Phenomena in the Ignition of Firedamp by Explosives: Part 1.- Particles from the Detonation

Phenomena in the Ignition of Firedamp by Explosives: Part 1.- Particles from the Detonation

Date: 1940
Creator: Gerhard, S. L. & Huff, Wilbert J.
Description: Report issued by the Bureau of Mines discussing the ignition of firedamp by coal-mining explosives. Experiments conducted to study the ignition of these particles are described. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
Correlation Index to Aid in Interpreting Crude-Oil Analyses

Correlation Index to Aid in Interpreting Crude-Oil Analyses

Date: 1940
Creator: Smith, Harold M.
Description: Report issued by the Bureau of Mines discussing the correlation index used for analyses of crude oils. The correlation index is presented and described in detail. This report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Quarry Accidents in the United States During the Calendar Year 1937

Quarry Accidents in the United States During the Calendar Year 1937

Date: 1940
Creator: Adams, William Waugh & Wrenn, Virginia E.
Description: Report issued by the Bureau of Mines over quarry accidents in the U.S. during 1937. The number, type, and location of the accidents are presented and discussed. This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Mineral Industries Survey of the United States, California: Tuolumne and Mariposa Counties, Mother Lode District (South). Mines of the Southern Mother Lode Region, Part 2 -- Tuolumne and Mariposa Counties

Mineral Industries Survey of the United States, California: Tuolumne and Mariposa Counties, Mother Lode District (South). Mines of the Southern Mother Lode Region, Part 2 -- Tuolumne and Mariposa Counties

Date: 1940
Creator: Julihn, C. E. & Horton, F. W.
Description: Report issued by the Bureau of Mines over mining operations in the southern Mother Lode Region of California. A review of this area is presented, and discussed. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
Cattle-Fever Ticks and Methods of Eradication

Cattle-Fever Ticks and Methods of Eradication

Date: 1940
Creator: Ellenberger, W. P. & Chapin, Robert M.
Description: Revised edition. This bulletin discusses the cattle-fever tick and methods for controlling it. Possible methods include dipping, pasture rotation, and arsenical dips. The life history of the tick is also discussed and instructions for constructing a concrete vat are given.
Contributing Partner: UNT Libraries Government Documents Department
Stock-Water Developments: Wells, Springs, and Ponds

Stock-Water Developments: Wells, Springs, and Ponds

Date: 1940
Creator: Hamilton, C. L. (Clifford Leslie), 1904- & Jepson, Hans G.
Description: "The need for effective utilization of grazing areas and the scarcity of stock water have led to unprecedented activity in the development of water supplies during the last few years as a part of conservation practices in range and pasture areas. Economical construction, planned distribution, and adequacy of stock-watering centers are essential to profitable grazing enterprises. Inadequate coordination of stock-water developments with necessary conservation practices and the improper location or construction of these facilities have made many water supplies unsatisfactory. This bulletin deals with the requirements and development of stock-water supplies suitable for grazing areas." -- p. ii
Contributing Partner: UNT Libraries Government Documents Department
Small Irrigation Pumping Plants

Small Irrigation Pumping Plants

Date: 1940
Creator: Rohwer, Carl & Lewis, M. R. (Mortimer Reed), 1886-
Description: "Throughout the United States are many farms, parts or all of which could be irrigated by pumping from either ponds or streams or farm wells. This bulletin is intended to furnish owners or operators of such farms with information that will give them some indication of initial and operating costs and enable them to determine whether soil and water suitable for irrigation are available and what kind of irrigation plant and equipment will be most satisfactory for their purpose. Having examined these factors, a farmer can decide whether irrigation is likely to be profitable on his farm." -- p. i
Contributing Partner: UNT Libraries Government Documents Department
Soil Defense in the Pacific Southwest

Soil Defense in the Pacific Southwest

Date: 1940
Creator: Rule, Glenn K. (Glenn Kenton), 1893- & Netterstrom, Ralph W.
Description: "The Pacific Southwest, as considered in this bulletin, embraces the two States -- California and Nevada. Evidences of soil and water losses are briefly touched upon, as are the factors contributing to these losses. The bulk of the bulletin deals with measures of defense that are now being employed on farms and range land within project areas of the Soil Conservation Service and in areas where members of Civilian Conservation Corps camps have been assigned to erosion-control activities." -- p. i. Some of the measures discussed include the use of cover crops, contour farming, crop rotation, subsoiling, strip cropping, and terracing.
Contributing Partner: UNT Libraries Government Documents Department
The Wheat Jointworm and Its Control

The Wheat Jointworm and Its Control

Date: 1940
Creator: Phillips, W. J. (William Jeter), 1879-1972 & Poos, F. W.
Description: Revised edition. "The wheat jointworm is a very small grub which lives in stems of wheat, feeding on the juices of the plant and causing a slight swelling or distortion of the stem above the joint. The egg from which it hatches is laid in the stem by an insect resembling a small black ant with wings. This insect attacks wheat only. The injury which it causes to wheat is very distinct from that caused by the Hessian fly, yet the effects caused by these two insects are often confused by farmers." -- p. 1-2. This bulletin gives a brief outline of the life cycle and the nature of the injury to the plant by the jointworm so that any farmer may readily recognize its work and be able to apply the measures of control herein recommended.
Contributing Partner: UNT Libraries Government Documents Department
Grinding machines

Grinding machines

Date: November 26, 1940
Creator: United States. Army. Air Corps
Description: This report provides the definition of grinding and discusses different processes, types, and operations of grinding.
Contributing Partner: UNT Libraries Government Documents Department
Lathes

Lathes

Date: November 29, 1940
Creator: United States. Army. Air Corps
Description: A guide to the operation and maintenance of lathes for general shop work.
Contributing Partner: UNT Libraries Government Documents Department
Stemming in Metal Mines. Progress Report 2

Stemming in Metal Mines. Progress Report 2

Date: August 1940
Creator: Johnson, John A.; Agnew, Wing G. & Mosier, McHenry
Description: Report issued by the U.S. Bureau of Mines on the progress made in metal-mine stemming. Different types of stemming methods and testing procedures are presented. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
Stress distribution in and equivalent width of flanges of wide, thin-wall steel beams

Stress distribution in and equivalent width of flanges of wide, thin-wall steel beams

Date: January 1, 1940
Creator: Winter, George
Description: The use of different forms of wide-flange, thin-wall steel beams is becoming increasingly widespread. Part of the information necessary for a national design of such members is the knowledge of the stress distribution in and the equivalent width of the flanges of such beams. This problem is analyzed in this paper on the basis of the theory of plane stress. As a result, tables and curves are given from which the equivalent width of any given beam can be read directly for use in practical design. An investigation is given of the limitations of this analysis due to the fact that extremely wide and thin flanges tend to curve out of their plane toward the neutral axis. A summary of test data confirms very satisfactorily the analytical results.
Contributing Partner: UNT Libraries Government Documents Department
Preliminary wind-tunnel investigation of an NACA 23012 airfoil with various arrangements of venetian-blind flaps

Preliminary wind-tunnel investigation of an NACA 23012 airfoil with various arrangements of venetian-blind flaps

Date: January 1, 1940
Creator: Wenzinger, Carl J & Harris, Thomas A
Description: Report presents the results of an investigation made in the NACA 7 by 10-foot wind tunnel of a large-chord NACA 23012 airfoil with several arrangements of venetian-blind flaps to determine the aerodynamic section characteristics as affected by the over-all flap chord, the chords of the slats used to form the flap, the slat spacing, the number of slats and the position of the flap with respect to the wing. Complete section data are given in the form of graphs for all the combinations tested.
Contributing Partner: UNT Libraries Government Documents Department
Mechanism of flutter.a theoretical and experimental investigation of the flutter problem

Mechanism of flutter.a theoretical and experimental investigation of the flutter problem

Date: January 1, 1940
Creator: Theodorsen, Theodore & Garrick, I E
Description: The results of the basic flutter theory originally devised in 1934 and published as NACA Technical Report no. 496 are presented in a simpler and more complete form convenient for further studies. The paper attempts to facilitate the judgement of flutter problems by a systematic survey of the theoretical effects of the various parameters. A large number of experiments were conducted on cantilever wings, with and without ailerons, in the NACA high-speed wind tunnel for the purpose of verifying the theory and to study its adaptability to three-dimensional problems. The experiments included studies on wing taper ratios, nacelles, attached floats, and external bracings. The essential effects in the transition to the three-dimensional problem have been established. Of particular interest is the existence of specific flutter modes as distinguished from ordinary vibration modes. It is shown that there exists a remarkable agreement between theoretical and experimental results.
Contributing Partner: UNT Libraries Government Documents Department
Free-spinning wind-tunnel tests of a low-wing monoplane with systematic changes in wings and tails V : effect of airplane relative density

Free-spinning wind-tunnel tests of a low-wing monoplane with systematic changes in wings and tails V : effect of airplane relative density

Date: January 1, 1940
Creator: Seidman, Oscar & Neihouse, A I
Description: The reported tests are a continuation of an NACA investigation being made in the free-spinning wind tunnel to determine the effects of independent variations in load distribution, wing and tail arrangement, and control disposition on the spin characteristics of airplanes. The standard series of tests was repeated to determine the effect of airplane relative density. Tests were made at values of the relative-density parameter of 6.8, 8.4 (basic), and 12.0; and the results were analyzed. The tested variations in the relative-density parameter may be considered either as variations in the wing loading of an airplane spun at a given altitude, with the radii of gyration kept constant, or as a variation of the altitude at which the spin takes place for a given airplane. The lower values of the relative-density parameter correspond to the lower wing loadings or to the lower altitudes of the spin.
Contributing Partner: UNT Libraries Government Documents Department
Investigations on the incompletely developed plane diagonal-tension field

Investigations on the incompletely developed plane diagonal-tension field

Date: January 1, 1940
Creator: Kuhn, Paul
Description: This report presents the results of an investigation on the incompletely developed diagonal-tension field. Actual diagonal-tension beams work in an intermediate stage between pure shear and pure diagonal tension; the theory developed by wagner for diagonal tension is not directly applicable. The first part of the paper reviews the most essential items of the theory of pure diagonal tension as well as previous attempts to formulate a theory of incomplete diagonal tension. The second part of the paper describes strain measurement made by the N. A. C. A. to obtain the necessary coefficients for the proposed theory. The third part of the paper discusses the stress analysis of diagonal-tension beams by means of the proposed theory.
Contributing Partner: UNT Libraries Government Documents Department
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