Those NBS Publications not listed in the Price Lists, are out of print and are not available from the Superintendent of Documents. Many can be consulted at libraries. Also, in many cases, photoduplicated copies can be purchased from the Library of Congress. For full information concerning this service, write to the Photoduplication Service, Library of Congress, Washington, D.C. 20540. Certain NBS publications are out of print because they have been replaced, or partially replaced, by material issued by other organizations. In this connection, NBS is able to offer the following information:

Circular 410, National Standard Petroleum Oil Tables. Information in this Circular has been incorporated in the ASTM-IP Petroleum Measurement Tables issued by the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103. Available at $8.75 ($6.50 to ASTM members). Tables 5 and 7 of the ASTM-IP Tables may also be purchased from the ASTM in separate reprint form at $1.50 a copy for the two tables.

Circular 438, Static Electricity. The National Fire Protection Association, 60 Batterymarch Street, Boston, Mass. 02110, has issued a publication by the same title, available from them as NFPA Publication 77M, at $1.00.

Circular 464, Gas Calorimeter Tables. The American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103, has issued a publication on this subject. Listed as ASTM D900-55, it can be ordered at 75 cents per copy.

Circular 499, Nuclear Data. The publication of nuclear data is being continued in a new journal entitled Nuclear Data, published by Academic Press, 111 Fifth Avenue, New York, N.Y. 10003.

Circular 564, Tables of Thermal Properties of Gases. A reprinted edition is available from Pergamon Press of London and New York, at $20.00. Microfische of this Circular is available from Cryogenic Data Center, National Bureau of Standards, Boulder, Colorado 80302 for $4.50.

Circular 576, Automotive Antifreezes. For information on this subject consult American National Standards Institute, 1430 Broadway, New York, N.Y. 10018.

Circular 577 and Supplement, Energy Loss and Range of Electrons and Positrons. These have been superseded by NASA Special Publication 3012, available from the National

Technical Information Service, Springfield, Va. 22151, at $3.00 hardcopy and $.65 microfische Number N65-12506.

Miscellaneous Publication 179, American Standard Building Code Requirements for Minimum Design Loads in Buildings and Other Structures. The American National Standards Institute, 1430 Broadway, New York, N.Y. 10018, has issued a publication on this subject. Available from them as A58.11955, at $2.50.

Miscellaneous Publication 187, Directory of Commercial and College Laboratories. A new Directory of College and Commercial Testing Laboratories is published by the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103, at $3.50.

Handbook 46, Code for Protection Against Lightning. A United States of America Standards Institute Code for Protection Against Lightning (NFPA-78-1969) is available from the American National Standards Institute, 1430 Broadway, New York, N.Y. 10018, at $1.25.

Handbook 49, Recommendations for Waste Disposal of Phosphorus-32 and Iodine-131 for Medical Users. Reprints of this Handbook can be purchased as NCRP Report 9 at $1.00 from NCRP Publications, Post Office Box 30175, Washington, D.C. 20014.

Handbook 58, Radioactive Waste Disposal in the Ocean. Reprints of this Handbook can be purchased as NCRP Report 16 at $1.00 from NCRP Publications, Post Office Box 30175, Washington, D.C. 20014.

Handbook 59, Permissible Dose from External Sources of Ionizing Radiations. Reprints of this Handbook can be purchased as NCRP Report 39 at $2.00 per copy from NCRP Publications, Post Office Box 30175, Washington, D.C. 20014.

Handbook 63, Protection Against Neutron Radiation up to 30 MeV. Reprints of this Handbook can be purchased as NCRP Report 20 at $1.00 per copy from NCRP Publications, Post Office Box 30175, Washington, D.C. 20014.

Handbook 65, Safe Handling of Bodies Containing Radioactive Isotopes. Reprints of this Handbook can be purchased as NCRP Report 21 at $1.00 per copy from NCRP Publications, Post Office Box 30175, Washington, D.C. 20014

Handbook 71, Specifications for Dry Cells and
Batteries. For more information on this
Handbook, write to
to American National
Standards Institute, 1430 Broadway, New
York, N.Y. 10018.

Handbook 73, Protection Against Radiations from Sealed Gamma Sources. For more information on this Handbook, write to NCRP Publications, Post Office Box 30175, Washington D.C. 20014.

Handbook 74, Building Code Requirements for Reinforced Masonry. The American National Standards Institute, 1430 Broadway, New York, N.Y. 10018 has issued a publication on this subject. Available from them as A41.2-1960 (R1970), at $2.75.

Handbook 75, Measurement of Absorbed Dose of Neutrons and of Mixtures of Neutrons and Gamma Rays, has been superseded by NCRP Report 25 at $1.00 per copy from NCRP Publications, Post Office Box 30175, Washington, D.C. 20014.

Handbook 76, Medical X-ray Protection Up to Three Million Volts. For more information on

this Handbook, write to NCRP Publications, Post office Box 30175, Washington, D.C. 20014.

Handbook 84, Radiation Quantities and Units, has been superseded by ICRU Report 11 at $1.00 per copy from ICRU Publications, Post Office Box 30165, Washington, D.C. 20014. Handbook 89, Methods of Evaluating Radiological Equipment and Materials. Reprints of this Handbook can be purchased as NCRP Report 10F at $1.25 per copy from NCRP Publications, Post Office Box 30175, Washington, D.C. 20014.

Handbook 97, Shielding for High-Energy Electron Accelerator Installations. Reprints of this Handbook can be purchased as NCRP Report 31 at $1.00 per copy from NCRP Publications, Post Office Box 30175, Washington, D.C. 20014.

Handbook 102, ASTM Metric Practice Guide. American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103, has issued a publication as Document E380-70, at $1.50.

January-February 1971

High-speed (subsecond) measurement of heat capacity, electrical resistivity, and thermal radiation properties of tantalum in the range 1900 to 3200 K, A. Cezairliyan, J. L. McClure, and C. W. Beckett, J. Res. Nat. Bur. Stand. (U.S.), 75A (Phys. and Chem.), No. 1, 1-13 (Jan.-Feb. 1971).

Key words: Electrical resistivity; emittance; heat capacity; high-speed measurements; high temperature; tantalum; thermal radiation properties; thermodynamics. Measurements of heat capacity, electrical resistivity, hemispherical total and normal spectral emittances of tantalum above 1900 K by a pulse heating technique are described. Duration of an individual experiment, in which the specimen is heated from room temperature to near its melting point, is less than one second. Temperature measurements are made with a photoelectric pyrometer. Experimental quantities are recorded with a digital data acquisition system. Time resolution of the entire system is 0.4 ms. Results on the above properties of tantalum in the range 1900 to 3200 K are reported and are compared with those in the literature. Estimated inaccuracy of measured properties in the above temperature range is 2 to 3 percent for heat capacity, 0.5 percent for electrical resistivity, 3 percent for hemispherical total emittance, and 2 percent for normal spectral emittance.

Thermophysical properties of methane: orthobaric densities and

some thermal properties, R. D. Goodwin, J. Res. Nat. Bur. Stand. (U.S.), 75A (Phys. and Chem.), No. 1, 15-21 (Jan.-Feb. 1971).

Key words: Heats of vaporization; methane; orthobaric densities; specific heats of the saturated liquid; thermofunctions for ideal gas states; thermophysical properties. For use in the computation of thermodynamic functions, analytical descriptions are given for the following properties: the orthobaric densities and saturation temperatures; the heats of vaporization; the specific heats of saturated liquid; and the thermodynamic functions for ideal gas states.

The infrared spectrum of matrix isolated BaO2, S. Abramowitz and N. Acquista, J. Res. Nat. Bur. Stand. (U.S.), 75A (Phys. and Chem.), No. 1, 23-25 (Jan.-Feb. 1971).

Key words: Barium; barium oxides; high temperature; infrared; matrix isolations.

The infrared spectra of matrix isolated BaO2 have been observed and assigned. Ba atoms were allowed to react with an argon oxygen mixture and condensed on a liquid hydrogen cooled surface. Spectra observed using 18O2 and 160180 confirm this assignment.

The various NBS publications series are grouped under subheadings within this section. The several volumes of the Journal of Research are presented consecutively within their appropriate subheadings. If a particular publications series is sought, consult the table of contents or the edge index on the back cover.

Refinement of the crystal structure of the aragonite phase of CaCO3, B. Dickens and J. S. Bowen, J. Res. Nat. Bur. Stand. (U.S.), 75A (Phys. and Chem.), No. 1, 27-32 (Jan.-Feb. 1971). Key words: Calcium carbonates; carbonates; crystal structure; single crystal x-ray diffraction.

Aragonite (CaCO3) crystallizes in the unit cell a=4.9598(5) Å, b=7.9641(9) Å, and c= 5.7379(6) Å at 25 °C with four formula weights in space-group Pmcn. The structure has been refined to R=0.024, R= 0.040 using 765 x-ray reflections from a single crystal. The Ca ion is coordinated to nine oxygens with Ca... O distances in the range 2.414(2) Å to 2.653(1) Å. The two unique C-O distances in the CO3 group are 1.288(2) Å (on the mirror plane) and 1.283(1) Å. The two unique O-C-O angles are 119.6(2)° (across the mirror plane) and 120.13(8)°. The distances and angles in the CO3 group are not significantly dif ferent at the 95 percent confidence level.

Simple shearing flows in polyisobutylene solutions, L. J. Zapas and J. C. Phillips, J. Res. Nat. Bur. Stand. (U.S.), 75A (Phys. and Chem.), No. 1, 33-40 (Jan.-Feb. 1971).

Key words: BKZ fluid; nonlinear behavior; polyisobutylene; stress relaxation; viscosity.

Measurements of shear stress for various shearing flow histories at 25 °C are correlated through the BKZ elastic fluid theory. The data are on 10 percent PIB solution in cetane. The histories include single step stress relaxation, suddenly applied steady shear, steady shearing flow, stress relaxation after steady shear. Synthesis of fluorodienes, J. E. Fearn, J. Res. Nat. Bur. Stand. (U.S.), 75A (Phys. and Chem.), No. 1, 41-56 (Jan.-Feb. 1971). Key words: Cyclic inter-intramolecular mechanism; diene polymerization; fluorodienes; intermediates; polymerization; purity; synthesis; telomerization.

In a comprehensive study of the cyclic, inter-intramolecular mechanism in diene polymerization, all of the completely fluorinated dienes from C5 to Cs have been prepared with a high degree of purity. Also prepared were 4-chloroperfluoro-1,6-heptadiene and perfluoro-1,11-dodecadiene, the latter inadvertently. The successful syntheses involved, in most cases, a telomerization which utilized, as the starting material, I2, ICI, CF2CFCI, or CF2CF2. From these telomers, not only the dienes but many new intermediate compounds were prepared; they were then purified and characterized. The chemistry of these compounds, especially that relating to their polymerization, is briefly discussed. Quantum corrections to the second virial coefficient for the Lennard-Jones (m-6) potential, M. E. Boyd, J. Res. Nat. Bur. Stand. (U.S.), 75A (Phys. and Chem.), No. 1, 57-89 (Jan.-Feb. 1971).

Key words: Lennard-Jones gas; (m-6) intermolecular potential; quantum corrections; second virial coefficient; statistical mechanics; thermodynamics.

Tables are presented for the second virial coefficient of a Lennard-Jones (m-6) gas in reduced variables for seven values of m.