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open access

A Glossary of Uranium- and Thorium-Bearing Minerals

Description: Glossary of minerals containing uranium and thorium. "In the index there are 325 entries which represent 81 species containing uranium and thorium as major constituents, 39 species containing small amounts of uranium and thorium, 29 species which should be tested for uranium and thorium, and 13 species which have been reported to contain impurities or intergrowths of uranium, thorium, or rare-earth minerals."
Date: January 1950
Creator: Frondel, Judith Weiss & Fleischer, Michael
open access

Gust-Tunnel Investigation to Determine the Load at the Joint of a Coupled Airplane Configuration Encountering a Gust

Description: "An investigation has been made in the Langley gust tunnel with two identical airplane models approximating 1/40-scale models of the B-29, coupled in tandem with a boom so that the individual centers of gravity were equidistant from the single coupling joint at the tail of the lead airplane. Time histories of the boom joint load were obtained as the models were flown through a gust. The results indicate that on a similar configuration involving airplanes the size of B-29 airplanes a load on the… more
Date: January 1950
Creator: Cahen, George L.
open access

Heats of Formation of Some Aqueous Ions of Americium

Description: Abstract: "The heats of formation of Pr-(+3) (aq.) and La-(+3) (aq.) have been measured in 1.5M HCl at 25 C. to be -165.9 +/- 0.9 kcal/mol and -167.0 +/- 0.7 kcal/mol, respectively. The heat of formation of Am-(+3) (aq.) under the same conditions was found to be -161.3 +/- 1.4 kcal/mol. The latter value made it possible to calculate the heat of formation of Am-(+4) (aq.) as -112.2 kcal/mol. It was impossible at this time to determine the heats of formation of AmO2+ (aq.) and AmO2++ (aq.)."
Date: 1950
Creator: Lohr, Harold Russell
open access

History of Premium Price Plan for Copper, Lead, and Zinc: 1942-47

Description: Report issued by the U.S. Bureau of Mines discussing the Premium Price Plan of copper, lead, and zinc. The Premium Price Plan is described, and cost and production data is presented. This report includes tables, and illustrations
Date: January 1950
Creator: Olund, H. E. & Gustavson, S. A.
open access

Icing-Protection Requirements for Reciprocating-Engine Induction Systems

Description: Report presenting an investigation of the icing of aircraft-engine induction systems. Criterions for safe operation and for the design of new induction system are established through the investigation. The results were obtained from laboratory investigations of carburetor-supercharger combinations, wind-tunnel investigations of air scoops, multicylinder-engine studies, and flight investigations.
Date: 1950
Creator: Coles, Willard D.; Rollin, Vern G. & Mulholland, Donald R.
open access

Information on the Prevention of Quarry Accidents

Description: From Introduction: "The primary objective of this paper is to discuss the hazards and furnish a list of recommendations for the safe operation of the quarries and related works. The second objective is to describe and illustrate safety devices, practices, and quarrying methods."
Date: 1950
Creator: Harrington, D.; Worcester, A. W. & East, J. H., Jr.
open access

Inundated Anthracite Reserves: Eastern Middle Field of Pennsylvania

Description: From Scope of Report: "In this report one major unwatering project was developed. Three pools that inundate considerable tonnages of anthracite reserves are close enough together to be unwatered by some centralized system. Three alternative plans were studied to estimate the cost of each."
Date: 1950
Creator: Ash, S. H. (Simon Harry), b. 1889; Kynor, H. D.; Fatzinger, R. W.; Davies, B. S. & Gilbert, J. C.
open access

Investigation of a NACA high-speed strain-gage torquemeter

Description: Report presenting an investigation of a strain-gage torquemeter employing a circuit to minimize effects of contact resistance, which was evaluated under static and dynamic conditions. Effects of temperature, axial stress, slip-ring contact resistance, and speed on the operation of the torquemeter were investigated. Results regarding the torsion-shaft static calibration, axial-stress effects, and dynamic operation are provided.
Date: January 1950
Creator: Rebeske, John J., Jr.
open access

An Investigation of the Longitudinal Characteristics of the MX-656 Configuration Using Rocket-Propelled Models Preliminary Results at Mach Numbers from 0.65 to 1.25

Description: "A rocket-propelled model of the MX-656 configuration has been flown through the Mach number range from 0.65 to 1.25. An analysis of the response of the model to rapid deflections of the horizontal tail gave information on the lift, drag, longitudinal stability and control, and longitudinal-trim change. The lift-coefficient range covered by the test was from -0.2 to 0,3 throughout most of the Mach number range" (p. 1).
Date: 1950
Creator: Mitchell, Jesse L. & Peck, Robert F.
open access

Investigation of the Tem Piute Tungsten Deposit, Lincoln County, Nevada

Description: Report issued by the Bureau of Mines over studies of the Tem Piute tungsten deposits. The physical features, geology, and mining methods are presented. This report includes maps, charts, and illustrations.
Date: January 1950
Creator: Binyon, Eugene O.; Holmes, G. H., Jr. & Johnson, A. C.
open access

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
open access

Linearized Supersonic Theory of Conical Wings

Description: Report presenting the theory of conical flow and its application to conical aircraft wings. Following an explanation of the theory, several types of wings are analyzed and compared with each other.
Date: January 1950
Creator: Lagerstrom, P. A.
open access

The load distribution due to sideslip on triangular, trapezoidal, and related plan forms in supersonic flow

Description: "Expressions are presented for the load distribution on a representative group of plan forms in sideslip at supersonic speeds. These expressions were obtained by the application of lifting-surface theories based on the linearized equation for compressible flow. Sketches of the load distributions are included" (p. 1).
Date: January 1950
Creator: Jones, Arthur L. & Alksne, Alberta
open access

Magnesite Deposits of Central Ceará, Brazil

Description: From introduction: The purpose of this study was to investigate the quantity and quality of [Central Ceara, Brazil] magnesite, and the writer concludes that this group of deposits constitutes one of the major reserves of high-grade magnesite in the Western Hemisphere. The ore could be used in the production of any commercial grade of magnesia with little or no beneficiation. Soil and alluvial overburden is thin between widespread outcrops, so all the deposits could be mined from open pits.
Date: 1950
Creator: Bodenlos, Alfred J.
open access

Magnetic Surveys in the Iron Springs District: Iron County, Utah

Description: Report issued by the Bureau of Mines over magnetometer surveys conducted on iron deposits in Utah. Details of the deposits included in the survey are listed. The methods of testing each deposit are also presented. This report includes tables, maps, photographs, and illustrations.
Date: January 1950
Creator: Cook, Kenneth L.
open access

Method for determining the frequency-response characteristics of an element or system from the system transient output response to a known input function

Description: "A method is presented for the determination of the frequency-response characteristics of an element or system by utilizing the transient output response to a known but arbitrary input to the system. Since the application of special inputs, such as step functions or sinusoids, is often imperfect or impractical, a method for utilizing arbitrary inputs is desirable. Simple flight-test data may be reduced by this method to give the frequency response of an aircraft" (p. 1).
Date: 1950
Creator: Curfman, Howard J., Jr. & Gardiner, Robert A.
open access

Mines and Mineral Deposits (Except Fuels) Fergus County, Montana

Description: Report issued by the U.S. Bureau of Mines discussing the mining procedures and minerals of Fergus County, Montana. History, geology, and mineral production of the Fergus County mines are presented. This report includes tables, and maps.
Date: January 1950
Creator: Robertson, Almon F.
open access

Mines and Mineral Deposits (Except Fuels) Meagher County, Montana

Description: Report issued by the U.S. Bureau of Mines discussing the mining procedures and minerals of Meagher County, Montana. History, geology, and mineral production of the Meagher County mines are presented. This report includes tables, and maps.
Date: January 1950
Creator: Roby, Robert N.
open access

Mining Methods and Practices at the Iron King Mine, Shattuck-Denn Mining Corporation, Yavapai County, Arizona

Description: Report issued by the U.S. Bureau of Mines discussing mining methods in Arizona mines. As stated in the introduction, "this paper describes mining operations at the Iron King mine of the Shattuck-Denn Mining Corp. in Yavapai County, Ariz." (p. 2). This report includes tables, maps, illustrations, and photographs.
Date: January 1950
Creator: Kumke, Charles A. & Mille, H. F.
open access

Mound Laboratory Report for Biological Research: June-September 1951

Description: A report about the effects of repeated polonium injections which have been under investigation by this laboratory to provide background information for future experiments and to provide experimental conditions that more closely simulate working hazards.
Date: 1950/1951
Creator: Davis, R. K. & Rockhold, W. T.
open access

Mound Laboratory Report for Biological Research: March-June 1951

Description: A report about the importance of undertaking studies of the effects of repeated, intravenous polonium injections upon laboratory animals.
Date: 1950/1951
Creator: Davis, R. K.; Rockhold, W. T.; Cowden, R. N.; Talley, L. H.; Glass, P. K.; Morris, G. L. et al.
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