Volume 21, Issue 1

January - March 1949

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The Present Status of the Evidence for the Atom-Annihilation Hypothesis

Robert A. Millikan

Rev. Mod. Phys. 21, 1 (1949) - Published 1 January, 1949

Extensive and Penetrating Atmospheric Showers

R. Maze, A. Fréon, J. Daudin, and P. Auger

Rev. Mod. Phys. 21, 14 (1949) - Published 1 January, 1949

The Penetrating Particles in Cosmic-Ray Showers

G. D. Rochester

Rev. Mod. Phys. 21, 20 (1949) - Published 1 January, 1949

Results and Problems Concerning the Extensive Air Showers

G. Cocconi

Rev. Mod. Phys. 21, 26 (1949) - Published 1 January, 1949

Discussion on the Disintegration and Nuclear Absorption of Mesons

Rev. Mod. Phys. 21, 31 (1949) - Published 1 January, 1949

The Mass of the Mesotron

Robert B. Brode

Rev. Mod. Phys. 21, 37 (1949) - Published 1 January, 1949

Photographic Evidence for the Existence of a Very Heavy Meson

Louis Leprince-Ringuet

Rev. Mod. Phys. 21, 42 (1949) - Published 1 January, 1949

On the Mechanism of Sudden Increases of Cosmic Radiation Associated with Solar Flares

S. E. Forbush, P. S. Gill, and M. S. Vallarta

Rev. Mod. Phys. 21, 44 (1949) - Published 1 January, 1949

DISCUSSION

Rev. Mod. Phys. 21, 49 (1949) - Published 1 January, 1949

Influence on the Cosmic-Ray Spectrum of Five Heavenly Bodies

Evan O. Kane, T. J. B. Shanley, and John A. Wheeler

Rev. Mod. Phys. 21, 51 (1949) - Published 1 January, 1949

Observations of Cosmic Rays at High Altitudes

Raymond V. Adams, Carl D. Anderson, and Eugene W. Cowan

Rev. Mod. Phys. 21, 72 (1949) - Published 1 January, 1949

A Critique of Ionization Measurements of Nuclear Disruptions Produced by Cosmic Radiation

Serge A. Korff

Rev. Mod. Phys. 21, 75 (1949) - Published 1 January, 1949

The Energy Spectrum of Cosmic-Radiation Particles and Photons

J. Clay

Rev. Mod. Phys. 21, 82 (1949) - Published 1 January, 1949

High Energy Particles, Bursts, and Showers

J. Clay

Rev. Mod. Phys. 21, 94 (1949) - Published 1 January, 1949

Evidence for Heavy Nuclei as a Component of Primary Cosmic Radiation

H. L. Bradt, Phyllis Freier, E. J. Lofgren, E. P. Ney, F. Oppenheimer, and B. Peters

Rev. Mod. Phys. 21, 101 (1949) - Published 1 January, 1949

Electrons and Photons in Cosmic Rays

Bruno Rossi

Rev. Mod. Phys. 21, 104 (1949) - Published 1 January, 1949

Theory of Meson Production

W. Heitler

Rev. Mod. Phys. 21, 113 (1949) - Published 1 January, 1949

On the Effect of Lead above Apparatus for the Detection of Low Energy Mesons

G. T. Reynolds

Rev. Mod. Phys. 21, 122 (1949) - Published 1 January, 1949

Electron Emitting Power of Stopped Mesons

Thorbjorn Sigurgeirsson and K. Alan Yamakawa

Rev. Mod. Phys. 21, 124 (1949) - Published 1 January, 1949

Some Consequences of the Electromagnetic Interaction between $μ^{-}$ -Mesons and Nuclei

John A. Wheeler

Rev. Mod. Phys. 21, 133 (1949) - Published 1 January, 1949

Energy Spectrum of Electrons from Meson Decay

J. Tiomno and John A. Wheeler

Rev. Mod. Phys. 21, 144 (1949) - Published 1 January, 1949

Charge-Exchange Reaction of the $μ$ -Meson with the Nucleus