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FOREWORD

The functions of the National Bureau of Standards are set forth in the Act of Congress, March 3, 1901, as amended by Congress in Public Law 619, 1950. These include the development and maintenance of the national standards of measurement and the provision of means and methods for making measurements consistent with these standards; the determination of physical constants and properties of materials; the development of methods and instruments for testing materials, devices, and structures; advisory services to Government agencies on scientific and technical problems; invention and development of devices to serve special needs of the Government; and the development of standard practices, codes, and specifications. The work includes basic and applied research, development, engineering, instrumentation, testing, evaluation, calibration services, and various consultation and information services. The program is carried out in the following technical divisions and offices: Electricity and electronics, optics and metrology, heat, atomic and radiation physics, chemistry, mechanics, organic and fibrous materials, metallurgy, mineral products, building technology, applied mathematics, data processing systems, basic instrumentation, weights and measures, cryogenic engineering, radio propagation, and radio standards.

The results of the Bureau's work take the form of either actual equipment and devices or published papers, which appear either in the Bureau's own series of publications or in the journals of professional and scientific societies. The Bureau itself publishes three monthly periodicals, available from the Government Printing Office: The Journal of Research, the Technical News Bulletin, and Basic Radio Propagation Predictions. There are also five series of nonperiodical publications: The Applied Mathematics Series, Circulars, Handbooks, Building Materials and Structures Reports, and Miscellaneous Publications.

The Supplement is a complete list, with brief abstracts, of Bureau publications issued during the period July 1, 1947, to June 30, 1957. It replaces the Supplement to National Bureau of Standards Circular 460 covering the period July 1, 1947, to June 30, 1952. Circular 460 for the period 1901 to June 30, 1947 remains in effect.

This publication was compiled and indexed in the Bureau's Publication Section by Betty L. Arnold.

A. V. ASTIN, Director.

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