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 Decade: 1960-1969
 Year: 1961
 Serial/Series Title: National Bureau of Standards Reports
 Collection: Technical Report Archive and Image Library
Atomic Energy Levels in Crystals

Atomic Energy Levels in Crystals

Date: February 24, 1961
Creator: Prather, John L.
Description: Report discussing discrete energy levels observed within certain crystals which are due to perturbations of energy levels of the free ion by an electrostatic field arising from the crystal lattice. The analytic procedures for determining the field from the charge configuration are given, and the resulting fields are classified according to their symmetry. After a general survey of group-theoretical ideas, the applicable groups are analyzed in detail, and characters appropriate for both integral and half-integral angular momenta of the free ion are tabulated. Text includes tabulations, equations, and matrices using Wigner and Racah coefficients.
Contributing Partner: UNT Libraries Government Documents Department
Bibliography and Index on Vacuum and Low Pressure Measurement

Bibliography and Index on Vacuum and Low Pressure Measurement

Date: November 10, 1961
Creator: Brombacher, W. G.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Bibliography of Temperature Measurement: January 1953 to June 1960

Bibliography of Temperature Measurement: January 1953 to June 1960

Date: April 6, 1961
Creator: Halpern, Carl & Moffat, Robert J.
Description: Report presenting more than 500 references to the field of temperature measurement. These references were collected from two general sources: Scientific and technical literature and government reports. The period covered is from 1953 to June 1960, with some from earlier dates. References are divided into a number of categories based on the type of instrument used. Some references to calibration of instruments and to scientific theories upon which temperature measurement is based are also presented.
Contributing Partner: UNT Libraries Government Documents Department
Capacities of Stacks in Sanitary Drainage Systems for Buildings

Capacities of Stacks in Sanitary Drainage Systems for Buildings

Date: July 3, 1961
Creator: Wyly, Robert S. & Eaton, Herbert N.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
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
A Compilation of the Physical Equilibria and Related Properties of the Hydrogen-Carbon Monoxide System

A Compilation of the Physical Equilibria and Related Properties of the Hydrogen-Carbon Monoxide System

Date: May 1961
Creator: Drayer, D. E. & Flynn, T. M.
Description: Graphical presentation of K-factors for eight isotherms, published data on the solid-vapor region, and a bibliography of approximately 450 references.
Contributing Partner: UNT Libraries Government Documents Department
Corrected Optical Pyrometer Readings

Corrected Optical Pyrometer Readings

Date: April 21, 1961
Creator: Poland, D. E.; Green, J. W. & Margrave, J. L.
Description: Report presenting a table of corrected optical pyrometer readings which enables optical pyrometer users to convert observed temperature immediately to the true temperature, if the effective emissivity of the material being observed is known. The table gives observed temperatures from 1,000 to 3,000ºK in increments of 5 degrees, from 3,000 to 5,000ºK in increments of 10 degrees, from 5,000 to 10,000ºK in increments of 50 degrees, and from 10,000 to 39,900ºK in increments of 100 degrees. For these, true temperatures are tabulated for 49 emissivities ranging from 0.02 to 0.98 in increments of 0.02.
Contributing Partner: UNT Libraries Government Documents Department
Development of High-Temperature Strain Gages

Development of High-Temperature Strain Gages

Date: March 17, 1961
Creator: Pitts, J. W. & Moore, D. G.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effect of Mortar Properties on Strength of Masonry

Effect of Mortar Properties on Strength of Masonry

Date: November 20, 1961
Creator: Fishburn, Cyrus C.
Description: Report issued by the National Bureau of Standards over studies conducted on the effects of mortar on the strength of masonry. Materials, methods, and results are presented and discussed. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
An Experimental Study of Phase Variations in Line-of-Sight Microwave Transmissions

An Experimental Study of Phase Variations in Line-of-Sight Microwave Transmissions

Date: November 1, 1961
Creator: Norton, K. A.; Herbstreit, J. W.; Janes, H. B.; Hornberg, K. O.; Peterson, C. F.; Barghausen, A. F. et al.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
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