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  • Letters to the Editor

•	Neutron Cross Sections at 120 and 345 Ev C. T. Hibdon pp. 747-748 [View   PDF (348 kB) ]

•	Experiments on Cosmic-Ray Mesons and Protons at Several Altitudes and Latitudes Marcello Conversi pp. 749-767 [View   PDF (4188 kB) ]

•	Cascades of Nuclear Disintegrations Induced by the Cosmic Radiation G. Cocconi, V. Cocconi Tongiorgi, and M. Widgoff pp. 768-780 [View   PDF (2521 kB) ]

•	Radioactive Isomers of Sn117 and Sn119 J. W. Mihelich and R. D. Hill pp. 781-783 [View   PDF (508 kB) ]

•	Radioactive Isotopes of Gadolinium R. E. Hein and A. F. Voigt pp. 783-786 [View   PDF (671 kB) ]

•	The Neutrons from the Disintegration of C13 by Deuterons C. E. Mandeville and C. P. Swann pp. 787-788 [View   PDF (404 kB) ]

•	A Mass Spectrometric Investigation of Branching in Cu64, Br80, Br82 and I128 John H. Reynolds pp. 789-794 [View   PDF (1308 kB) ]

•	The Phenomenological Theory of Exchange Currents in Nuclei R. K. Osborn and L. L. Foldy pp. 795-802 [View   PDF (1679 kB) ]

•	Diffusion in the Ionosphere M. H. Johnson and E. O. Hulburt pp. 802-807 [View   PDF (1034 kB) ]

•	Further Investigation of the Radioactivity of Sb124 L. M. Langer, R. D. Moffat, and H. C. Price pp. 808-812 [View   PDF (813 kB) ]

•	Relation between π- and μ-Meson Production Spectra in the Atmosphere Giulio Ascoli pp. 812-814 [View   PDF (467 kB) ]

•	Radioactive Isotopes of the Rare Earths. III. Terbium and Holmium Isotopes Geoffrey Wilkinson and Harry G. Hicks pp. 815-818 [View   PDF (753 kB) ]

•	The Radiofrequency Spectrum of K39F by the Electric Resonance Method Ludwig Grabner and Vernon Hughes pp. 819-828 [View   PDF (1832 kB) ]

•	Energy Levels, Selection Rules, and Line Intensities for Molecular Beam Electric Resonance Experiments with Diatomic Molecules Vernon Hughes and Ludwig Grabner pp. 829-836 [View   PDF (1486 kB) ]

•	Hyperfine Structure and Isotope Shift in Barium O. H. Arroe pp. 836-838 [View   PDF (640 kB) ]

•	Li8 Splinters from Nuclear Bombardments S. Courtenay Wright pp. 838-845 [View   PDF (1551 kB) ]

•	Theory of the Superconducting State. I. The Ground State at the Absolute Zero of Temperature H. Fröhlich pp. 845-856 [View   PDF (2084 kB) ]

•	Fluorescence of Solutions Bombarded with High Energy Radiation (Energy Transport in Liquids) Hartmut Kallmann and Milton Furst pp. 857-870 [View   PDF (3328 kB) ]

•	Condensation Phenomena in a Clustering Bose-Einstein Gas William Band pp. 871-876 [View   PDF (1022 kB) ]

•	Crystal Statistics of a Two-Dimensional Triangular Ising Lattice G. F. Newell pp. 876-882 [View   PDF (1175 kB) ]

•	Superconductivity in Tin-Germanium "Alloys" Ralph P. Hudson pp. 883 [View   PDF (234 kB) ]

•	Radiofrequency Spectrum of H2 in a Magnetic Field H. G. Kolsky, T. E. Phipps, N. F. Ramsey, and H. B. Silsbee pp. 883-884 [View   PDF (458 kB) ]

•	The Zero-Point Energy of Helium C. L. Pekeris pp. 884-885 [View   PDF (455 kB) ]

•	A Ferromagnetic Curie Point in KTaO3 at Very Low Temperatures J. K. Hulm, B. T. Matthias, and E. A. Long pp. 885-886 [View   PDF (429 kB)  See Also: Erratum]

•	A New Long-Lived Krypton Activity John H. Reynolds pp. 886-887 [View   PDF (450 kB) ]

•	Atomic Moments of Ferromagnetic Alloys R. M. Bozorth pp. 887 [View   PDF (251 kB) ]

•	A New Determination of h / e C. L. Hemenway and F. G. Dunnington pp. 887-888 [View   PDF (594 kB) ]

•	Domain Structure of a Cobalt-Nickel Crystal R. M. Bozorth and J. G. Walker pp. 888 [View   PDF (343 kB) ]

•	The Spin of the Neutron M. Hamermesh and E. Eisner pp. 888 [View   PDF (343 kB) ]

•	Energy Levels Associated with Se75 J. M. Cork, W. C. Rutledge, C. E. Branyan, A. E. Stoddard, and J. M. Le Blanc pp. 889 [View   PDF (288 kB) ]

•	Thermal Equilibrium in Neutron-Irradiated Semiconductors J. H. Crawford and K. Lark-Horovitz pp. 889-890 [View   PDF (565 kB) ]

•	On the Formation of Dislocations from Vacancies Frederick Seitz pp. 890-891 [View   PDF (506 kB) ]

•	The Fierz and Kopfermann-Brix Explanation of the Spectroscopic Odd-Even Isotope Shift Staggering G. Breit pp. 891 [View   PDF (229 kB) ]

•	Disintegration of Ru103 Evani Kondaiah pp. 891-892 [View   PDF (450 kB) ]

•	Temperature Variation of the Compressibility of Molten Sodium T. E. Pochapsky and S. L. Quimby pp. 892 [View   PDF (222 kB)  See Also: Erratum]

•	Scattering of Positrons and Electrons by Nuclei H. J. Lipkin and M. G. White pp. 892-893 [View   PDF (448 kB) ]

•	The Reaction C14(n,γ)C15 L. Yaffe and W. H. Stevens pp. 893 [View   PDF (226 kB) ]

•	Low Energy Electrons at the End of μ-Meson Tracks William F. Fry pp. 893-894 [View   PDF (421 kB) ]

•	Restriction of Prismatic Punching to a Limited Class of Crystals F. R. Nabarro pp. 894 [View   PDF (195 kB) ]

•	Luminescence of Color Centers in Alkali Halides Clifford C. Klick pp. 894-896 [View   PDF (556 kB) ]

•	Beta-Decay of Ag111 and Spin-Orbit Coupling in Cd111 Stig Johansson pp. 896-897 [View   PDF (356 kB) ]

•	The Radiations of Ce141 and Pa233 M. S. Freedman and D. W. Engelkemeir pp. 897-899 [View   PDF (579 kB) ]

•	Temperature Dependence of the Energy Gap in Germanium from Conductivity and Hall Data V. A. Johnson and H. Y. Fan pp. 899 [View   PDF (207 kB) ]

•	Emission of Neutral Radiation in Cosmic-Ray Stars E. Pickup and L. Voyvodic pp. 899-900 [View   PDF (625 kB) ]

•	Magnetic Analysis of the B10(p,α)Be7 Reaction D. M. Van Patter, A. Sperduto, E. N. Strait, and W. W. Buechner pp. 900-901 [View   PDF (649 kB) ]

•	Radiations of Krypton85 H. Zeldes, B. H. Ketelle, and A. R. Brosi pp. 901-902 [View   PDF (393 kB) ]

•	Argon39 Beta-Spectrum A. R. Brosi, H. Zeldes, and B. H. Ketelle pp. 902 [View   PDF (162 kB) ]

•	The Nature of Trapped Hole Color Centers in the Alkali Halides E. Burstein and J. J. Oberly pp. 903-904 [View   PDF (466 kB) ]

•	Multiple Scattering of the Particles Producing the "Positive Tracks" Appearing near Beta-Ray Emitters Gerhart Groetzinger and Fred L. Ribe pp. 904-905 [View   PDF (488 kB) ]

•	The Absorption of Penetrating Cosmic Rays Underground C. A. Randall, N. Sherman, and W. E. Hazen pp. 905 [View   PDF (230 kB) ]

•	Internal Conversion Coefficients of Sc46 M. L. Moon, M. A. Waggoner, and A. Roberts pp. 905-906 [View   PDF (464 kB) ]

•	On the Theory of Supersonic Absorption A. Gierer and K. Wirtz pp. 906-907 [View   PDF (425 kB) ]

•	Mobility of Electrons and Holes in Diamond E. A. Pearlstein and R. B. Sutton pp. 907 [View   PDF (190 kB) ]

•	Upper Limit on the Cross Section for the Scattering of Neutrinos J. H. Barrett pp. 907-908 [View   PDF (453 kB) ]

•	Neutron Binding Energies J. R. Huizenga, L. B. Magnusson, O. C. Simpson, and G. H. Winslow pp. 908 [View   PDF (262 kB) ]

•	The Solar Flare of November 19, 1949 and Cosmic Rays J. Clay and H. F. Jongen pp. 908-909 [View   PDF (515 kB) ]

•	The Photo-Disintegration of the Deuteron Ingvar F. Hansson pp. 909-910 [View   PDF (496 kB) ]

•	An Anomalous Effect Observed in Self-Quenching Counters Containing Neon A. D. Krumbein pp. 910 [View   PDF (244 kB) ]

•	Differential Identities in Three-Field Renormalization Problem Abdus Salam pp. 910-911 [View   PDF (450 kB) ]

•	Isotope Effect and Lattice Properties in Superconductivity Karl F. Herzfeld, Emanuel Maxwell, and Russell B. Scott pp. 911 [View   PDF (206 kB) ]

•	Ionization Chamber Bursts at Very High Altitudes G. W. McClure and M. A. Pomerantz pp. 911-912 [View   PDF (443 kB) ]

•	On the Origin of the Cosmic Radiation C. Y. Fan pp. 912-913 [View   PDF (394 kB) ]