Comparison theorems for symmetric functions of characteristic roots, M. Marcus. Another extension of Heinz's inequality, M. Marcus. Mean motions in conditionally periodic separable systems, J. P. Vinti. Some boundary value problems involving plasma media, J. R. Wait. A new decomposition formula in the theory of elasticity, J. H. Bramble and L. E. Payne. Pointwise bounds in the Cauchy problem of elastic plates, L. E. Payne. Volume 64C (Eng. and Instr.), No. 3 (July-Sept. 1960) A new method of measuring gage blocks, J. B. Saunders. Gage blocks of superior stability: initial developments in materials and measurement, M. R. Myerson, T. R. Young, and W. R. Ney. Variation of resolving power and type of test pattern, F. E. Washer and W. P. Tayman. A multiple isolated-input network with common output, C. M. Allred and C. C. Cook. Phase angle master standard for 400 cycles per second, J. H. Park and H. N. Cones. Disturbances due to the motion of a cylinder in a two-layer liquid system, L. H. Carpenter and G. H. Keulengan. Volume 64C (Eng. and Instr.), No. 4 (Oct.-Dec. 1960) Error analysis of a standard microwave phase shifter, G. E. Schafer and R. W. Beatty. A method of controlling the effect of resistance in the link circuit of the Thomson or Kelvin double bridge, D. Ramaley. Automatic precise recording of temperature, G. S. Ross and H. D. Dixon. Gimbal device to minimize the effects of off-center loading on balance pans, H. A. Bowman and L. B. Macurdy. Response of microchemical balances to changes in relative humidity, H. E. Almer. Chemical changes occurring during the weathering of two coating-grade asphalts, S. H. Greenfeld. Characteristics of fifteen coating-grade asphalts, S. H. Greenfeld. Volume 65C (Eng. and Instr.), No. 1 (Jan.-Mar. 1961) Electronic scanning microscope for a spectrographic plate comparator, M. L. Kuder. Viscoelastometer for measurement of flow and elastic recovery, R. J. Overberg and H. Leaderman. An ultra low frequency bridge for dielectric measurements, D. J. Scheiber. The Ephi system for VLF direction finding, G. Hefley, R. F. Linfield, and T. L. Davis. Fast counting of alpha particles in air ionization chambers, Z. Bay, F. D. McLernon, and P. A. Newman. X-ray diffraction measurement of intragranular misorientation in alpha brass subjected to reverse plastic strain, C. J. Newton and H. C. Vacher. Enthalpy and specific heat of nine corrosion-resistant alloys at high temperatures, T. B. Douglas and A. C. Victor. Determination of minor constituents in low-alloy steels by X-ray spectroscopy, R. E. Michaelis, R. Alvarez, and B. A. Kilday. Volume 65C (Engr. and Instr.), No. 2 (Apr.-June 1961) An experimental study concerning the pressurization and stratification of liquid hydrogen, A. F. Schmidt, J. R. Purcell, W. A. Wilson, and R. V. Smith. Temperature dependence of elastic constants of some cermet specimens, S. Spinner. Analog simulation of zone melting, H. L. Mason. Residual losses in a guard-ring micrometer-electrode holder for solid-disk dielectric specimens, A. H. Scott and W. P. Harris. A bolometer mount efficiency measurement technique, G. F. Engen. Telescope for measurement of optic angle of mica, S. Ruthberg. An automatic fringe counting interferometer for use in the calibration of line scales, H. D. Cook and L. A. Marzetta. Volume 64D (Radio Prop.), No. 4 (July-Aug. 1960) Relation of turbulence theory to ionospheric forward scatter propagation experiments, A. D. Wheelon. Propagation at oblique incidence over cylindrical obstacles, M. P. Bachynski. Diffraction by smooth conical obstacles, H. E. J. Neugebauer and M. P. Bachynski. Characteristics of 488 megacycles per second radio signals reflected from the moon, B. C. Blevis and J. H. Chapman. The use of polarization fading of satellite signals to study the electron content and irregularities in the ionosphere, C. G. Little and R. S. Lawrence. Note on a test of the equivalence theorem for sporadic E propagation, J. W. Wright and T. N. Gautier. Daytime attenuation rates in the very low frequency band using atmospherics, W. L. Taylor. Measured electrical properties of snow and glacial ice, A. D. Watt and E. L. Maxwell. Half-wave cylindrical antenna in a dissipative medium: current and impedance, R. King and C. W. Harrison. Preface to ELF papers, J. R. Wait. Some ELF phenomena, E. T. Pierce. Mode theory and the propagation of ELF radio waves, J. R. Wait. Studies of natural electric and magnetic fields, G. D. Garland and T. F. Webster. Natural electromagnetic energy below the ELF range, W. H. Campbell. Possible application of the system loss concept at ELF, K. A. Norton. Measurements of the spectrum of radio noise from 50 to 100 cycles per second, M. Balser and C. A. Wagner. Volume 64D (Radio Prop.), No. 5 (Sept.-Oct. 1960) ELF electric fields from thunderstorms, A. D. Watt. Field strength measurements in fresh water, G. S. Saran and G. Held. Electrical resistivity studies on the Athabasca Glacier, Alberta, Canada, G. V. Keller and F. C. Frischknecht. Amplitude distribution for radio signals reflected by meteor trails, A. D. Wheelon. Computation and measurement of the fading rate of moon-reflected UHF signals, S. J. Fricker, R. P. Ingalls, W. C. Mason, M. L. Stone, and D. W. Swift. On the theory of wave propagation through a concentrically stratified troposphere with a smooth profile, H. Bremmer. Polarization and depression-angle dependence of radar terrain return, I. Katz and L. M. Spetner. Methods of predicting the atmospheric bending of radio rays, B. R. Bean, G. D. Thayer, and B. A. Cahoon. Loss in channel capacity resulting from starting delay in meteor-burst communication, G. R. Sugar. Elementary considerations of the effect of multipath propagation in meteor-burst communication, G. R. Sugar, R. J. Carpenter, and G. R. Ochs. Use of logarithmic frequency spacing in ionogram analysis, G. A. M. King. Propagation of microwaves through a magneto-plasma, and a possible method for determining the electron velocity distributions, A. L. Cullen. On electromagnetic radiation in magneto-ionic media, H. Kogelnik. Radiation and admittance of an insulated slotted-sphere antenna surrounded by a strongly ionized plasma sheath, J. W. Marini. A contribution to the theory of corrugated guides, G. Piefke. High-gain, very low side-lobe antenna with capability for beam slewing, A. C. Wilson. Shielding of transient electromagnetic signals by a thin conducting sheet, N. R. Zitron. Cylindrical antenna theory, R. H. Duncan and F. A. Hinchey. Volume 64D (Radio Prop.), No. 6 (Nov.-Dec. 1960) URSI National Committee Report: Commission 1. Radio measurement methods and standards Commission 2. Commission 3. Tropospheric radio propagation Radio noise of terrestrial origin Commission 5. Radio astronomy Commission 6. Radio waves and circuits Volume 65D (Radio Prop.), No. 1 (Jan.-Feb. 1961) Incoherent scattering by free electrons as a technique for studying the ionosphere and exosphere: some observations and theoretical consideration, K. L. Bowles. Radio wave absorption of several gases in the 100 to 117 kMc/s frequency range, C. O. Britt, C. W. Tolbert, and A. W. Straiton. On the theory of diffraction by a composite cylinder, R. D. Kodis. An atlas of oblique-incidence ionograms (a digest), V. Agy, K. Davies, and R. Salaman. A new approach to the mode theory of VLF propagation, J. R. Wait. East-west effect on VLF mode transmission across the earth's magnetic field, D. Dobrott and A. Ishimaru. Magneto-ionic propagation phenomena in low- and very-low-radiofrequency waves reflected by the ionosphere, J. R. Johler. Correlation of monthly median transmission loss and refractive index profile characteristics, B. R. Bean and B. A. Cahoon. Characteristics of waveguides for long-distance transmission, A. E. Karbowiak and L. Solymar. Useful radiation from an underground antenna, H. A. Wheeler. Observation of F-layer and sporadic-E scatter at VHF in the Far East, K. Miya, T. Sasaki, and M. Ishikawa. A high-resolution rapid-scan antenna, H. V. Cottony and A. C. Wilson. Volume 65D (Radio Prop.), No. 2 (Mar.-Apr. 1961) Ionospheric motions observed with high-frequency back-scatter sounders, L. H. Tveten. Relationship between red auroral arcs and ionospheric recombination, G. A. M. King and F. E. Roach. Fresnel region fields of circular aperture antennas, M. K. Hu. Free-balloon borne meteorological refractometer, J. F. Theisen and E. E. Gossard. Weather and reception level on a troposphere link-annual and short-term correlations, L. G. Abraham, Jr., and J. A. Bradshaw. Initial results of a new technique for investigating sferic activity, G. Hefley, R. H. Doherty, and R. F. Linfield. Effect of antenna radiation angles upon HF radio signals propagated over long distances, W. F. Utlaut. Graphical determination of radio ray bending in an exponential atmosphere, C. F. Pappas, L. E. Vogler, and P. L. Rice. A formula for radio ray refraction in an exponential atmosphere, G. D. Thayer. The impedance of a monopole antenna with a circular conducting-disk ground system on the surface of a lossy half space, S. W. Maley and R. J. King. Radio-wave propagation in the earth's crust, H. L. Wheeler. Volume 65D (Radio Prop.), No. 3 (May-June 1961) Propagation studies using direction-finding techniques, E. C. Hayden. Diversity effects in long distance high frequency radio pulse propagation, S. A. Bowhill. Influence of ionospheric conditions on the accuracy of high frequency direction finding, P. J. D. Gething. Phase difference observations at spaced aerials and their application to direction finding, W. C. Bain. Research at the National Bureau of Standards applicable to long-distance location and direction-finding problems, R. Silberstein. Design for spinning goniometer automatic direction finding, W. J. Lindsay and D. S. Heim. Resolution characteristics of correlation arrays, I. W. Linder. Instrumentation for propagation and direction-finding measurements, E. C. Hayden. Brooke variance classification system for DF bearings, E. M. L. Beale. Estimation of variances of position lines from fixes with unknown target positions, E. M. L. Beale. Statistics of a radio wave diffracted by a random ionosphere, S. A. Bowhill. Space analysis of radio signals, J. B. Smyth. Effect of receiver bandwidth on the amplitude distribution of VLF atmospheric noise, F. F. Fulton, Jr. Excitation of VLF and ELF radio waves by a horizontal magnetic dipole, J. Galejs. Technical News Bulletin. This monthly publication summarizes the current research, development, and test activities of the Bureau. The articles are brief, with emphasis on the results of research and their significance, chosen for their importance to other scientists, engineers, and to industry. Résumés of longer research reports, important national and international conferences on fundamental science in which the Bureau has represented the Nation, and a bibliography of all publications by members of the staff as published are included. The Bulletin is designed to give a succinct account of the current work of the Bureau. (Annual subscription: domestic, $1.50; foreign, $2.25.) Basic Radio Propagation Predictions. This is a monthly publication for those concerned with radio communication in determining the best skywave frequencies over any path at any time of day for average conditions for the month of prediction, which are made 3 months in advance. Charts of extraordinary-wave critical frequency for the F2 layer and of maximum usable frequency for a transmission distance of 4,000 km, of highest frequency of sporadic E in excess of 15 Mc are included. In addition, there are various maps, charts, diagrams, and nomograms needed to make practical application of the world-contour charts, together with examples of their use. (Annual subscription: $1.50; foreign, $2.00.) Monographs. These are usually contributions to the technical literature which are too lengthy for publication in the Journal of Research. They often provide extensive compilations of information on subjects related to the Bureau's technical program. Until July 1959 most of this type of material was published in the Circular series. 12. Stabilization of free radicals at low temperatures. $1.50. 17. New description of thorium spectra, R. Zalubas. 65 cents. 18. Heat treatment and properties of iron and steel, T. G. Digges and S. J. Rosenberg. 35 cents. 19. Atomic energy levels in crystals, J. L. Prather. 60 cents. 20. Ideal gas thermodynamic functions and isotope exchange functions for the diatomic hydrides, deuterides, and tritides, L. Haar, A. S. Friedman, and C. W. Beckett. $2.75. 21. Specific heats and enthalpies of technical solids at low temperatures. A compilation from the literature, R. J. Corruccini and J. J. Gniewek. 20 cents. 22. Climatic charts and data of the radio refractive index for the United States and the world, B. R. Bean, J. D. Horn, and A. M. Ozanich, Jr. $2.00. 23. Amplitude-probability distributions for atmospheric radio noise, W. Q. Crichlow, Q. D. Spaulding, C. J. Roubique, and R. T. Disney. 20 cents. 24. A spectrophotometric atlas of the spectrum of CH from 3000 A to 5000 A, A. M. Bass and H. P. Broida. 20 cents. 26. Development of high-temperature strain gages, J. W. Pitts and D. G. Moore. 20 cents. 27. Bibliography of temperature measurement, January 1953 to June 1960, C. Halpern and R. J. Moffat. 15 cents. 28. Causes of variation in chemical analyses and physical tests of portland cement, B. L. Bean and J. R. Dise. 25 cents. 29. Thermal expansion of technical solids at low temperatures. A compilation from the literature, R. J. Corruccini and J. J. Gniewek. 20 cents. 30. Corrected optical pyrometer readings, D. E. Poland, J. W. Green, and J. L. Margrave. 55 cents. Circulars. Circulars are compilations of information on various subjects related to the Bureau's scientific and technical activities. They not only include the results of Bureau studies but give data of general interest from other sources. The Circular series was discontinued in June 1959. After this date, material that would formerly have been published in the Circular series has been largely directed to the Journal of Research and the new Monograph series. 510, Suppl. 2. Alphabetical index to tables of chemical kinetics. Homogeneous reactions. 35 cents. 539, Vol. 10. Standard X-ray diffraction powder patterns. H. E. Swanson, M. I. Cook, E. H. Evans, and J. H. deGroot. 40 cents. Miscellaneous Publications. As the name implies, this series includes material, which, because of its character or because of its size, does not fit into any of the other regular publication series. Some of these are charts, administrative pamphlets, Annual Reports, Weights and Measures Conference Reports, and other subjects appropriate to the Miscellaneous series. 230. Standardization activities in the United States. A descriptive directory, S. F. Booth. $1.75. 231. Hydraulic research in the United States, 1960, H. K. Middleton. $1.00. 232. The metric system of measurement. 50 cents. 233. Units of weight and measure (United States customary and metric). Definitions and tables of equivalents, L. V. Judson. 40 cents. 234. Household weights and measures. 5 cents. 235. Report of the 45th national conference on weights and measures, 1960. 75 cents. 236. Standard frequencies and time signals from NBS stations WWV and WWVH. 10 cents. 237. Research highlights of the National Bureau of Standards, annual report 1960. 65 cents. 240. Publications of the National Bureau of Standards July 1, 1957, to June 30, 1960. (Includes titles of papers published in outside journals 1950 to 1959.) B. L. Arnold. $2.25. Handbooks. These are recommended codes of engineering and industrial practice, including safety codes, developed in cooperation with the national organizations and others concerned. In many cases the recommended requirements are given official status through their incorporation in local ordinances by State and municipal regulatory bodies. 28. (1957)-Part III. Screw-thread standards for federal services 1957. 60 cents. 72. Measurement of neutron flux and spectra for physical and biological applications. 35 cents. 30 cents. 74. Building code requirements for reinforced masonry. 15 cents. 73. Protection against radiations from sealed gamma sources. 75. Measurement of absorbed dose of neutrons, and of mixtures of neutrons and gamma rays. 35 cents. 76. Medical X-ray protection up to 3 million volts. 25 cents. 77. Precision measurement and calibration. Vol. I. Electricity and electronics. $6.00; Vol. II. Heat and mechanics. $6.75; Vol. III. Optics, metrology, and radiation. $7.00. 78. Report of the International Commission on radiological units and measurements (ICRU) 1959. 65 cents. Technical Note Series. This series was initiated in 1959 to supplement the Bureau's regular publications program. Technical Notes provide a means for making available scientific data that are of transient or limited interest. They are available by purchase from the Office of Technical Services, U.S. Department of Commerce, Washington 25, D.C. (Order by PB number only.) 2-2 (PB151361-2) Supplementary world maps of F2 critical frequencies and maximum usable frequency factors, D. H. Zacharisen. $3.50. 18-3 (PB151377-3) Quarterly radio noise data-June, July, August 1959, W. Q. Crichlow, R. T. Disney, and M. A. Jenkins. $1.00. 18-4 (PB151377-4) Quarterly radio noise data-September, October, November 1959, W. Q. Crichlow, R. T. Disney, and M. A. Jenkins. $1.50. 18-5 (PB151377-5) Quarterly radio noise data-December, January, February 1959-60, W. Q. Crichlow, R. T. Disney, and M. A. Jenkins. $1.75. 18-6 (PB151377-6) Quarterly radio noise data-March, April, May 1960, W. Q. Crichlow, R. T. Disney, and M. A. Jenkins. $1.75. 18-7 (PB151377-7) Quarterly radio noise data-June, July, August 1960, W. Q. Crichlow, R. T. Disney, and M. A. Jenkins. $1.75. 18-8 (PB151377-8) Quarterly radio noise data-September, October, November 1960, W. Q. Crichlow, R. T. Disney, and M. A. Jenkins. $1.75. 18-9 (PB151377-9) Quarterly radio noise data-December, January, February 1960– 1961, W. Q. Crichlow, R. T. Disney, and M. A. Jenkins. $1.75. 40-3 (PB151399-3) Mean electron density variations of the quiet ionosphere, May 3, 1959, J. W. Wright, L. R. Wescott, and D. J. Brown. $1.50. 55 (PB161556) Investigation of bearing creep of two forged aluminum alloys, L. Mordfin, N. Halsey, and P. J. Granum. $1.00. 59 (PB161560) Measurements and standards in plasma-physics and astrophysics at the National Bureau of Standards. $1.00. 60 (PB161561) Amplitude and phase of the low and very low-radiofrequency ground wave, J. R. Johler, L. C. Walters, and C. M. Lilley. 75 cents. 61 (PB161562) Proceedings of the 1960 conference on the propagation of ELF radio waves, J. R. Wait. 75 cents. 62 (PB161563) Rapid determination of the order of chemical reactions from time ratio tables, J. H. Flynn. $3.00. 63 (PB161564) Single scattered neutrons from an isotropic point source, E. R. Mosburg, Jr., and W. M. Murphey. 50 cents. 64 (PB161565) Design and operation of the Coilometer computer, P. Meissner. $2.00 66 (PB161567) Radio refractometry, J. W. Herbstreit. 50 cents. 67 (PB161568) On the nature of the crystal field approximation, K. Goldberg and C. M. Herzfeld. $2.50. |