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  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: NBS monograph
 Collection: Technical Report Archive and Image Library
Causes of Variation in Chemical Analyses and Physical Tests of Portland Cement

Causes of Variation in Chemical Analyses and Physical Tests of Portland Cement

Date: April 27, 1961
Creator: Bean, B. Leonard & Dise, John R.
Description: Report discussing variations in comparative tests of portland cements that could lead to the rejection of a material fully conforming to specification requirements, or the acceptance of a material with undesirable chemical or physical properties. Many of the causes for variation in chemical analyses and physical test results are listed in this discussion, and remedies for some of the more frequently encountered deficiencies in apparatus and methods are suggested.
Contributing Partner: UNT Libraries Government Documents Department
Bibliography of Temperature Measurement: July 1960 to December 1962

Bibliography of Temperature Measurement: July 1960 to December 1962

Date: September 13, 1936
Creator: Halpern, Carl
Description: Report presenting 700 additional references to the field of temperature measurement as a supplement to NBS Monograph 27, "Bibliography of Temperature Measurement, January 1953 to June 1960" issued April 6, 1961. These references were collected from two general sources: Scientific and technical literature and government reports. The period covered is from July 1960 to December 1962 with some earlier references which were found later. The arrangement of material is the same as in Monograph 27.
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Hydrogen Stark Broadening Calculations With the Unified Classical Path Theory

Hydrogen Stark Broadening Calculations With the Unified Classical Path Theory

Date: May 1970
Creator: Vidal, C. R.; Cooper, J. & Smith, E. W.
Description: Report discussing the case of upper and lower state interaction introduced by a unified theory using a more compact tetradic notation. The general result is then applied to the Stark broadening of hydrogen. The thermal average of the time development operator for upper and lower state interaction is presented. A simple technique for evaluating the Fourier transform of the thermal average has been developed. The final calculations based on the unified theory and on the one-electron theory are compared with measurements in the high and low electron density regime.
Contributing Partner: UNT Libraries Government Documents Department
Thermocouple Reference Tables Based on the IPTS-68: Reference Tables in Degrees Fahrenheit for Thermoelements versus Platinum (Pt-67)

Thermocouple Reference Tables Based on the IPTS-68: Reference Tables in Degrees Fahrenheit for Thermoelements versus Platinum (Pt-67)

Date: March 1975
Creator: Powell, Robert L. & Burns, George W.
Description: Report presenting tables as a supplement to those given in NBS Monograph 125. Tables were calculated from the power series expansions presented in that Monograph. They are based upon the absolute electrical units and the International Practical Temperature Scale of 1968 (IPTS-68). Reference tables for several thermoelements versus platinum (Pt-67) are given with values of the thermoelectric voltage as a function of temperature in degrees Fahrenheit. Only tables for standard letter-designated thermoelements are included.
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The Calculation of Rotational Energy Levels and Rotational Line Intensities in Diatomic Molecules

The Calculation of Rotational Energy Levels and Rotational Line Intensities in Diatomic Molecules

Date: June 1970
Creator: Hougen, Jon T.
Description: Report describing procedures for making quantum mechanical calculations of rotational energy levels and rotational line intensities in diatomic molecules. The procedures are illustrated by sample calculations. A familiarity with the material of this report should enable a practicing electronic spectroscropist to carry out, though in a rather mechanical way, his own theoretical calculations for molecules under experimental investigation.
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Mass and Mass Values

Mass and Mass Values

Date: January 1974
Creator: Pontius, Paul E.
Description: Report discussing the different bases for determining mass values and instances where these differences may be crucial. The first part is a historical summary of weighing, standards, and the assignment of value; and the interfacing of mass measurements with civilization. The second part discusses in detail the methods of assigning mass values. Ways to convert from values on one basis to values on another basis are discussed.
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Unified Theory Calculations of Stark Broadened Hydrogen Lines Including Lower State Interactions

Unified Theory Calculations of Stark Broadened Hydrogen Lines Including Lower State Interactions

Date: January 1971
Creator: Vidal, C. R.; Cooper, J. & Smith, E. W.
Description: Report on calculations of hydrogen Stark broadening on the basis of the unified classical path theory which has been extended to include lower state interactions in the final line profile. A detailed comparison with experiments in the density range 10-13-10-17 cm-3 is given.
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Properties of Glasses in Some Ternary Systems Containing BaO and SiO2

Properties of Glasses in Some Ternary Systems Containing BaO and SiO2

Date: September 1973
Creator: Cleek, Given W. & Babcock, C. L.
Description: Report discussing the glass forming regions in six ternary oxide systems containing BaO, Si02, and a third oxide. The properties of the resulting glasses were measured and the results reported. The data on refractive indices, dispersions, and specific volumes were evaluated by computer methods in an attempt to identify "substructures" containing the cations present in the glasses.
Contributing Partner: UNT Libraries Government Documents Department
Reference Tables for Low-Temperature Thermocouples

Reference Tables for Low-Temperature Thermocouples

Date: June 1972
Creator: Sparks, Larry L.; Powell, Robert L. & Hall, William J.
Description: Report discussing the completed experimental program of the low-temperature reference tables for the commonly used thermocouples. Details of the experimental system, instrumentation, data analysis, error analysis, and materials tested are given in order to allow the user to better evaluate and apply the results.
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A High-Dispersion Spectral Analysis of the Ba II Star HD 204075 (ζ Capricorni)

A High-Dispersion Spectral Analysis of the Ba II Star HD 204075 (ζ Capricorni)

Date: March 1971
Creator: Tech, Jack L.
Description: Report discussing a double differential curve of growth analysis for the Ba II star S Capricorni. Both the sun and � Virginis (G9 II-III) were used as comparison stars. The observational material consists of equivalent widths, central depths, and half-widths for 1100 spectral lines measured on direct-intensity tracings of plates obtained by J. L. Greenstein at the coude focus of the 200-in telescope. The plates cover the spectral regions 3880-4825 A and 5100-6720 A at reciprocal dispersions of 2.3 and 3.4 A/mm, respectively. Atmospheric abundances have been derived for 37 elements.
Contributing Partner: UNT Libraries Government Documents Department