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Water Pools in Pennsylvania Anthracite Mines

Description: Report issued by the Bureau of Mines discussing water pools that accumulate in Pennsylvania anthracite mines. Factors that lead to underground water pools, and methods for water drainage are presented. This report includes tables, maps, illustrations, and photographs.
Date: 1949
Creator: Ash, S. H.; Eaton, W. L.; Hughes, Karl; Romischer, W. M. & Westfield, J.
Partner: UNT Libraries Government Documents Department
open access

Activation Analysis of the Rare Earths

Description: This report is a descriptive journey of the Activation Analysis of the Rare Earths.
Date: November 30, 1949
Creator: Kohn, H. W. & Tompkins, E. R.
Partner: UNT Libraries Government Documents Department
open access

Aerodynamic characteristics of the NACA 8-H-12 airfoil section at six Reynolds numbers from 1.8 x 10(exp 6) to 11.0 x 10(exp 6)

Description: Report presenting an investigation in the two-dimensional low-turbulence pressure tunnel to determine the aerodynamic characteristics of the NACA 8-H-12 airfoil section at four Reynolds numbers. The section lift, drag, and pitching-moment characteristics are presented for smooth and rough surface conditions. Generally, no unusual scale effects are present for either condition.
Date: December 1949
Creator: Schaefer, Raymond F. & Smith, Hamilton A.
Partner: UNT Libraries Government Documents Department
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Design and calibration of a total-temperature probe for use at supersonic speeds

Description: Report presenting a study of the factors involved in the design of total-temperature probes for use at supersonic speeds as applied to the design of an instrument to be used in wind-tunnel calibrations. Tests of the probe showed that the calibration factor required in the conversion of the measured temperature to the true total temperature was 0.992 for a range of Mach numbers.
Date: May 1949
Creator: Goldstein, David L. & Scherrer, Richard
Partner: UNT Libraries Government Documents Department
open access

An Analysis of Supersonic Aerodynamic Heating With Continuous Fluid Injection

Description: From Introduction: "The aerodynamic heating problem assumes considerable importance at high-supersonic speeds. Sanger and Bredt (reference 1) have calculated the high-speed aerodynamic forces and equilibrium surface temperature at extremely high altitudes where the molecular mean free path is large (free-molecule-flow region) compared with a characteristic body dimension. The theoretical investigation of Lees (reference 2) on the stability of the laminar boundary layer in compressible flow ind… more
Date: September 29, 1949
Creator: Klunker, E. B. & Ivey, H. Reese
Partner: UNT Libraries Government Documents Department
open access

New Accelerators of Charged Particles

Description: This article examines the history of accelerating charged particles with new types of accelerators. It is translated from a Russian publication.
Date: January 1949
Creator: Grinberg, A. P. (Anatoliĭ Pavlovich)
Partner: UNT Libraries Government Documents Department
open access

Survey of the Present Status of Isotope Separation Methods

Description: The problem of the separation or enrichment of isotopes is as old as the knowledge of the existence of isotopes of stable elements. The article focuses on the mass-dependent property of atoms continuing to be investigated in laboratories to test its usefulness for new solutions to this problem.
Date: October 14, 1949
Creator: Groth, W. (Wilhelm)
Partner: UNT Libraries Government Documents Department
open access

Periodic report form for depository libraries

Description: Annual report from the North Texas State College depository library to the Superintendent of Documents. This report indicates that the library received 2,201 items from July 1, 1949 to December 31, 1949. The report also offers a description of the procedures followed to process the materials and make them discoverable to library patrons.
Date: [1949,1950]
Creator: United States. Government Printing Office.
Partner: UNT Libraries Government Documents Department
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