Resource Type

Map of Standard Time Zones of the United States and Adjacent Parts of Canada and Mexico as of January 1, 1948

Map of the United States and surrounding areas with time zones marked and labeled in red. Bodies of water are marked, with depth marked by hatchures, as well as state lines and major cities..
Date: January 1, 1948
Creator: Geological Survey (U.S.)
Object Type: Map
System: The UNT Digital Library
An Experimental Study of Phase Variations in Line-of-Sight Microwave Transmissions (open access)

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

From Introduction: "The purpose of this report is to present an analysis of time variations in: (1) the phase (relative to a stable phase reference) if a 9414 Mc/s signal transmitted over this path, referred to hereafter as single-path phase data; (2) the phase observed at one receiving antenna relative to that observed at an adjacent antenna, referred to as phase difference data; (3) atmospheric refractivity as recorded by a microwave refractometer located at the Haleakala terminal; (4) the wind velocity at both ends of the path, and (5) surface atmospheric refractivity measured at 5 stations located on or near the path."
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.
Object Type: Report
System: The UNT Digital Library
Calibration Procedures for Direct-Current Resistance Apparatus (open access)

Calibration Procedures for Direct-Current Resistance Apparatus

From Object and Scope of This Paper: "This paper describes the apparatus and procedures used at the National Bureau of Standards for the measurement of d-c resistance when an accuracy of a few parts in a million is required. The object will be to explain procedures in detail and as simply as possible, with a minimum reference to theory."
Date: March 1, 1962
Creator: Brooks, Paul P. B.
Object Type: Report
System: The UNT Digital Library
Tables of Chemical Kinetics : Homogeneous Reactions (Supplementary Tables) (open access)

Tables of Chemical Kinetics : Homogeneous Reactions (Supplementary Tables)

From Preface: "A brief description of the method used in compiling these tables and the limitation of coverage are given in the preface to Supplement 1 of the NBS Circular 510. The present volume contains information pertaining to substitution, exchange, and elimination reaction types and extends the material on these types found in NBS Monograph 34, Volume 1. The date on each page gives the year and month to which the literature had been surveyed."
Date: July 1, 1964
Creator: United States. Bureau of Standards.
Object Type: Report
System: The UNT Digital Library
Mechanical Properties of Structural Materials at Low Temperatures: A Compilation From the Literature (open access)

Mechanical Properties of Structural Materials at Low Temperatures: A Compilation From the Literature

From Introduction: "The data are presented with the idea that an engineer who is making initial calculations on equipment for operation at cryogenic temperatures is more interested in obtaining quickly a definite figure that he in evaluating the experimental data given in several detailed reports on the same material. The graphs and tables presented here, consequently, represent an attempt by the authors to perform evaluation of data which have appeared in the literature and to present the design engineer with the result."
Date: June 1, 1960
Creator: McClintock, R. Michael & Gibbons, Hugh P.
Object Type: Report
System: The UNT Digital Library
Ionospheric Radio Propagation (open access)

Ionospheric Radio Propagation

From Preface: "The purpose of this book is to replace, in part, a previous publication of the National Bureau of Standards (Circular 462) with the same title. The scope of the present work has therefore been broadened to include aspects of ionospheric radio propagation which were not treated in earlier publication."
Date: April 1, 1965
Creator: Davies, Kenneth
Object Type: Report
System: The UNT Digital Library
Properties of High-Temperature Ceramics and Cermets: Elasticity and Density at Room Temperature (open access)

Properties of High-Temperature Ceramics and Cermets: Elasticity and Density at Room Temperature

From Introduction: "The present paper contains detailed descriptions of the methods used in calculating both the elastic constants and the statistical parameters. These detailed descriptions have been included for two reasons: (1) To leave no doubt as to the exact procedure, and (2) to act as a guide to other workers who might wish to make similar determinations."
Date: March 1, 1960
Creator: Lang, S. M.
Object Type: Report
System: The UNT Digital Library
Testing of Metal Volumetric Standards (open access)

Testing of Metal Volumetric Standards

From Purpose: "The specifications and tolerances contained in this Monograph should be of assistance to purchasers of metal capacity standards. The information on methods of calibration and use of these measures should prove valuable to weights and measures officials and those persons in industry who are concerned with measurements of volumes of fluids."
Date: April 1, 1963
Creator: Hughes, J. C. & Keysar, B. C.
Object Type: Report
System: The UNT Digital Library
Microwave Spectral Tables: [Volume 1.] Diatomic Molecules (open access)

Microwave Spectral Tables: [Volume 1.] Diatomic Molecules

From Abstract: "For about 1500 spectral lines of diatomic molecules observed by coherent radiation techniques, measured frequencies, assigned quantum numbers, and newly computed intensities are given."
Date: December 1, 1964
Creator: Wacker, Paul F.; Mizushima, Masataka; Peterson, Jean D. & Ballard, Joe R.
Object Type: Report
System: The UNT Digital Library
Heat Treatment and Properties of Iron and Steel (open access)

Heat Treatment and Properties of Iron and Steel

From Abstract: "This Monograph is a revision of the previous NBS Monograph 18. Its purpose is to provide an understanding of the heat treatment of iron and steels, principally to those unacquainted with this subject. The basic principles involved in the heat treatment of these materials are presented in simple form." From Introduction: "This Monograph has been prepared to answer such inquires and to give in simplified form a working knowledge of the basic theoretical and practical principles involved in the heat treatment of iron and steel."
Date: November 1, 1966
Creator: Digges, Thomas G.; Rosenberg, Samuel J. & Geil, Glenn W.
Object Type: Report
System: The UNT Digital Library
A Method for the Dynamic Determination of the Elastic, Dielectric, and Piezoelectric Constants of Quartz (open access)

A Method for the Dynamic Determination of the Elastic, Dielectric, and Piezoelectric Constants of Quartz

From Abstract: "Several dynamic determinations have been made of the constants of quartz. Most of these determinations do not take into account the piezoelectric effect; those that do, suffer from certain deficiencies which are discussed in this paper."
Date: June 1, 1960
Creator: Basri, Saul A.
Object Type: Report
System: The UNT Digital Library
Thermocouple Materials (open access)

Thermocouple Materials

From Introduction: "The purpose of this paper is to present information on materials that are used from 0 degrees C up in thermocouples intended primarily as immersed temperature sensors, and to give so far as is practical properties of these materials that might affect their use in temperature measurement."
Date: March 1, 1962
Creator: Caldwell, F. R.
Object Type: Report
System: The UNT Digital Library
Structure Shielding Against Fallout Radiation From Nuclear Weapons (open access)

Structure Shielding Against Fallout Radiation From Nuclear Weapons

From Purpose: "This Monograph is to assist scientists and engineers in the solution of problems of protection from ionizing radiation, particularly radiation from fallout."
Date: June 1, 1962
Creator: Spencer, L. V.
Object Type: Report
System: The UNT Digital Library
Stabilization of Free Radicals at Low Temperatures: Summary of the NBS Program (open access)

Stabilization of Free Radicals at Low Temperatures: Summary of the NBS Program

From Forward: "Although the first paper in this volume describes the general aspects of the technical management of the program, it is important to emphasize that much of success and productivity of this program stemmed from the sympathetic understanding of its basic viewpoint by both the Department of Defense and the National Bureau of Standards."
Date: August 1, 1960
Creator: Bass, Arnold M. & Broida, H. P.
Object Type: Report
System: The UNT Digital Library
Low Temperature Mechanical Properties Of Copper and Selected Copper Alloys: A Compilation From the Literature (open access)

Low Temperature Mechanical Properties Of Copper and Selected Copper Alloys: A Compilation From the Literature

From Abstract: "In the past 60 years considerable data have been accumulated concerning the mechanical properties of copper and its alloys.It was felt that there was great need to adequately document these results in one publication. Therefore a unique type of compilation is presented. The compilation is divided into four parts. The first section is intended for quick reference use for those who are interested in average values. The second section includes data from most of the investigators who have published results on the mechanical properties of copper and its alloys. The third section is composed of tables classifying the investigations which were not in section two. The fourth section section lists, in alphabetical order, all references used."
Date: December 1, 1967
Creator: Reed, Richard P. & Mikesell, Ritchie P.
Object Type: Report
System: The UNT Digital Library
Report of the Forty-Third National Conference on Weights and Measures, 1958 (open access)

Report of the Forty-Third National Conference on Weights and Measures, 1958

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.
Date: December 1, 1958
Creator: United States. National Bureau of Standards.
Object Type: Report
System: The UNT Digital Library
Mollier Chart of Properties of Ammonia, 1923 (open access)

Mollier Chart of Properties of Ammonia, 1923

Mollier chart of properties of ammonia.
Date: May 1, 1923
Creator: United States. Bureau of Standards.
Object Type: Report
System: The UNT Digital Library
Guide Chart for Carbon Brush Terminals (Electric) (open access)

Guide Chart for Carbon Brush Terminals (Electric)

Diagrams and tolerances in inches for different size terminals.
Date: June 1, 1945
Creator: United States. Bureau of Standards.
Object Type: Report
System: The UNT Digital Library
Table and Mollier chart for ammonia below -60° F (open access)

Table and Mollier chart for ammonia below -60° F

A report containing a table and Mollier chart for ammonia below -60° F.
Date: November 1, 1948
Creator: Meyers, Cyril H.
Object Type: Report
System: The UNT Digital Library
High-Frequency Voltage Measurement (open access)

High-Frequency Voltage Measurement

Fundamental principles and techniques used for voltage measurements primarily for frequencies in the upper audio- and radio-frequency ranges and including part of the ultrahigh frequency range.
Date: September 1, 1949
Creator: Selby, Myron C.
Object Type: Report
System: The UNT Digital Library
Single-Phase Transfer of Liquefied Gases (open access)

Single-Phase Transfer of Liquefied Gases

Report examining the problems of handling liquefied gases and discusses the feasibility of transporting them through piping systems.
Date: December 1, 1958
Creator: Jacobs, Robert B.
Object Type: Report
System: The UNT Digital Library
Use of Sulphite Cellulose Extract as a Tanning Material (open access)

Use of Sulphite Cellulose Extract as a Tanning Material

Report issued by the Bureau of Standards over chemicals used for tanning leather hides. As stated in the introduction: "an investigation was conducted to determine the suitability of sulfite cellulose extracts, derived from the waste liquors discharged from paper pulp mills, for use in tanning hides for the manufacture of leather" (p. 309). This report includes tables, and photographs.
Date: November 1, 1926
Creator: Wallace, E. L. & Bowker, Roy Clement
Object Type: Report
System: The UNT Digital Library
A New Form of Standard Resistance (open access)

A New Form of Standard Resistance

Report issued by the Bureau of Standards over new developments of electrical resistivity in manganin wire coils. The results of the developments are discussed. This report includes tables, illustrations, and photographs.
Date: October 1, 1908
Creator: Rosa, Edward B.
Object Type: Report
System: The UNT Digital Library
Analytical Standards for Trace Elements in Petroleum Products (open access)

Analytical Standards for Trace Elements in Petroleum Products

Report discussing a search conducted for stable, oil-soluble, organic compounds of metals (and other elements) for use in the spectrographic analysis of petroleum products. Compounds having suitable physical properties have been selected as standards. Methods are given for preparation of the compounds and for the spectrographic and chemical analysis of the chosen standards. Procedures are described for the preparation of stable solutions thereof in petroleum oils.
Date: October 1, 1962
Creator: Isbell, H. S.; Tipson, R. Stuart; Hague, J. L.; Scribner, B. F.; Smith, W. Harold; Wade, Clarence W. R. et al.
Object Type: Report
System: The UNT Digital Library