The National Bureau of Standards is engaged in fundamental and applied research in physics, chemistry, mathematics, and engineering. Projects are conducted in fifteen fields: electricity and electronics, optics and metrology, heat and power, atomic and radiation physics, chemistry, mechanics, organic and fibrous materials, metallurgy, mineral products, building technology, applied mathematics, data processing sys¬ tems, cryogenic engineering, radio propagation, and radio standards. The Bureau has custody of the national standards of measurement and conducts research leading to the improvement of scientific and engineering standards and of techniques and methods of measurement. Testing methods and instruments are developed; physical constants and properties of materials are determined; and technical processes are investigated.
Der Theoretiker alles weiss und nights kann. Der Praktiker nichts weiss und alles kann.German engineers' proverb.Practice is blind without theory.Theory is lame without practice.Bibliographies and indexes, including some which list technical reports . e.Buyers' guides, exhibit guides, directories of manufacturers. f. Guides to dissertations, patents, standards, etc., and to branches of science literature (chemistry, physics, engineering, etc.). These types of literature are excluded: a.Separates (patents, dissertations, governmental and institutional bulletins, technical reports, etc.). Some guides, abstracts and indexes covering separates are listed. b. Trade literature (catalogs, fliers, instruction manuals and nontechnical house organs) . c. Trivia and ephemera. l.U TIME COVERAGE.Books subject to obsolescence are listed only from about 195>0; most entries are less than 10 years old. Some are still in preparation (196U). Some lastingly useful publications are entered regardless of age. Beginning dates of serials (even into previous centuries), and time coverage of bibliographies, are noted when known. SOURCES CONSULTED.Reference sources of these types were used: a. Card catalogs and appropriate shelves in LC, NBS Library, US POL and NLM. b. Book reviews and publishers' announcements (taken as found, not systematically searched). c. Pertinent subject sections in catalogs (1962-6U ) of domestic and foreign publishers of technical books. d.
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