The Development of Physics in the U.S.S.R. in 40 Years of Soviet Power

835

Investigation of the Thermal Properties of Superconductors. I. Tin (Down to 0.15 K)

837

The Interaction Between Light Atomic Nuclei and Particles with Energies of 10^{12} to 10^{13} Ev

848

Angular Distribution of Axes of Extensive Air Showers at Sea Level

856

Determination of Nuclear Moments of Gd^{155} and Gd^{157} from the Hyperfine Structure of Paramagnetic Resonance

860

An Anomalous Magnetic Transition in Anhydrous Copper Sulfate

862

Yield and Angular Distribution of Fast Photoneutrons from Deuterium and Carbon

865

Alpha Particles Emitted by Heavy Emulsion Nuclei in Emulsions Bombarded by HighEnergy Protons

871

The Bi^{212}Po^{212} Decay Scheme

878

The Decay Scheme of Tl^{208}

880

On the Elastic Backward Scattering of 660Mev Protons Against Carbon Nuclei

883

On the Form of the BetaDecay Interaction

885

Concerning a Model for a NonIdeal Fermi Gas

888

Nuclear Reactions in Li^{7} and C^{12} Induced by N^{14} Ions

892

A Study of Slow μ Mesons in the Stratosphere by the Method of Delayed Coincidences

894

Electron Spectrum at 3200 m Above Sea Level

897

Experimental Data on Cascade Multiplication of Electrons in Lead

903

Observation of Particles of Charge Z > 2 in Disintegrations Produced in Photographic Emulsions by HighEnergy Neutrons

906

Knockout of Deuterons from Li, Be, C, and O Nuclei by Protons of Energy 675 Mev

911

A GroupTheoretical Consideration on the Basis of Relativistic Quantum Mechanics. II. Classification of the Irreducible Representations of the Inhomogeneous Lorentz Group

919

A GroupTheoretical Consideration on the Basis of Relativistic Quantum Mechanics. III. Irreducible Representations of the Classes P_{0} and O_{0}, and the NonCompletelyReducible Representations of the Inhomogeneous Lorentz Group

929

Equations for the Green's Functions of a System of Fundamental Particles

935

The Interactions of Slow π Mesons with Nuclei

940

Oscillations of a FermiLiquid in a Magnetic Field

945

Investigation of the Equilibrium Form of Atomic Nuclei

951

Diffraction Scattering and Nucleon Structure

960

Inverse Dispersion Relations

962

Electron Losses Due to Phase Oscillations Induced by Radiation Fluctuations in Synchrotrons

965

Nonlinear Effects in Metals at Low Temperatures

970

Invariant Representation of the Scattering Matrix

972

Application of Dispersion Relations for the Determination of Bound States

975

The Quantum States of Particles Coupled with Arbitrary Strength to a Harmonically Oscillating Continuum. II. The Case of Translational Symmetry

977

On the Problem of the Excited States of Nucleons

981

On the Theory of the Anomalous Skin Effect in Metals

985

Aging Equation for Gamma Quanta

989

Saturation Effect in a System with Three Energy Levels

991

On the Fluctuations of Nuclear Matter

995

LETTERS TO THE EDITOR 
Measurement of Polarization Quantities

1000

Radiation Corrections in the Dispersion Relations for

1001

Remarks on the Article by Cooper and Grossart "Time Delay in Internal Electric Breakdown of Solid Dielectrics"

1002

The nElectron Green's Function in the BlochNordsieck Approximation

1003

On the Speed of Propagation of Electromagnetic Waves at Audio Frequencies

1004

Scattering of 333Mev Negative π Mesons by Hydrogen

1006

Scattering of 307Mev Negative π Mesons by Hydrogen with Charge Exchange

1007

Effect of Quantum Fluctuations in the Electron Radiation of the Synchrotron Oscillations

1008

On the Use of Dispersion in Energy as a Criterion for the Accuracy of the Variational Method

1009
