Optical Determination of the Density of He^{3}

645

Effect of Magnetic Viscosity on the Frequency Properties of Ferrites

649

Ion Scattering Coefficient as a Function of CollidingParticle Mass Ratio

653

Formation of Negative H^{} Ions in Collisions of Electrons with Hydrogen Molecules

657

Paramagnetic Relaxation in Single Crystals of Certain Salts of the Elements of the Iron Group

661

A GroupTheoretical Consideration on the Basis of Relativistic Quantum Mechanics. I. The General Properties of the Inhomogeneous Lorentz Group

664

Electrical Conductivity of Ferromagnetic Semiconductors (Ferrites)

673

Propagation of Cascades in a MultiLayer Medium

676

Correlations in the Distribution of Cascade Particles

680

Polarization of Nucleons Elastically Scattered Against Target Particles of Spin 1

684

Nuclear Forces and the Scattering of π Mesons

692

A New Possibility in Neutrino Theory

700

Nonlinear Theory of Phase Oscillations Induced in Electron Synchrotrons by Quantum Radiation Fluctuations

702

The Relation between Matrix Elements for "Particles" and "Holes" in Nuclear Shell Theory

706

The Energy Dependence of a Scattering Cross Section Near the Threshold of Reaction

709

The Influence of a He^{3} Impurity on the Viscosity of Helium II

714

The Use of Leontovich's Boundary Conditions in the Theory of Cerenkov Radiation

717

Thermodynamics of the He I  He II Phase Transitions in Helium Isotope Mixtures

719

On the Equations of the Oscillations of the Molecular Generator

726

The Interaction of Shock Waves with Small Perturbations. I

729

The Interaction of Shock Waves with Small Perturbations. Il

739

Time Reversal and Reactions Involving Polarized Particles

748

On the Method of "Second Quantization" in Phase Space

753

Nuclear Reactions in SuperDense Cold Hydrogen

760

Behavior of Nonmetallic Crystals in Strong Electric Fields

763

Selection Rules for Electromagnetic Transitions in Deformed Nuclei

771

Scattering of Slow Neutrons in Ferromagnets

776

The Theory of Electromagnetic Waves in a Crystal in which Excitons Are Produced

785

LETTERS TO THE EDITOR 
Conversion of L II and LIII Electrons with Emission of E1Quantum in E0 Nuclear Transitions

797

Sign of the Space Charge on the Axis of a Positive Column in a Longitudinal Magnetic Field

798

Contribution to the Theory of Stripping at High Energies

799

Paramagnetic Resonance in Neodymium Nitrate

801

Radiation Corrections to Particle Scattering in External Field and to Compton Effect in Scalar Quantum Electrodynamics

803

Magnetic Resonance of Nuclei of Paramagnetic Atoms

804

Elastic Scattering of Mesons by Helium Nuclei at 300 Mev

806

Nucleon Energy Levels in Spheroidal Nuclei

808

Diffraction Scattering of HighEnergy Protons by Protons

809

Paramagnetic Resonance in New Organic Radicals

811

Asymptotic Selection Rules for Beta Decay of Deformed Nuclei

812

Polarization of 635Mev Protons by Deuterons in QuasiElastic pp Scattering

813

Concerning a Symmetry Property of the New GellMann Theory

815

Superconductivity of Beryllium Films Condensed on a Cold Backing

816

Comparison of Calorimetric and Ionization Measurements of the Energy Flux of Synchrotron Gamma Rays

817

On the Question of the Fluctuations of Electron Concentration in the FLayer of the Ionosphere

818

Photoproduction of Strange Particles

819

On the Use of Two Auxiliary Fields to Obtain Emission States in Quantum Mechanical Amplifiers and Generators

820

Limiting Laws for Surface Tension of Solutions of Strong Electrolytes

822

Refinement of the Approximation for Small Angles in MultipleScattering Problems

823

Comparison of Neutron Spectra in the Fission of U^{233}, U^{235}, Pu^{239}

825

Concerning the Reality of the Nonstationary Model of the Intermediate State

827

Spins and Parities of the Hyperfragment H^{4}_{Λ} and of the K Meson

828

Radiation From an Electron Traversing a Slab

829

Influence of Electrostatic Field on the Absorption of Sound in Rochelle Salt

830

Cyclotron Resonance in Tin at 9300 Mcs

831
