Volume 21, Issue 5

T. F. Hoang, D. P. Eartly, J. J. Phelan, A. Roberts, C. L. Sandler, S. Bernstein, S. Margulies, D. W. McLeod, T. H. Groves, N. N. Biswas, N. M. Cason, V. P. Kenney, J. M. Marraffino, J. T. McGahan, J. A. Poirier, and W. D. Shephard

Phys. Rev. Lett. 21, 316 (1968) - Published 29 July, 1968

Gravitational Radiation Damping

Kip S. Thorne

Phys. Rev. Lett. 21, 320 (1968) - Published 29 July, 1968

Properties of the $P$ and $P^{'}$ Regge Trajectories from Low-Energy $π N$ and $KN$ Scattering Amplitudes

Frederick J. Gilman, Haim Harari, and Yair Zarmi

Phys. Rev. Lett. 21, 323 (1968) - Published 29 July, 1968

$s$ -Wave $K_{π}$ Interaction in the $K_{l 3}$ Decay Mode

R. C. Field and P. B. Jones

Phys. Rev. Lett. 21, 327 (1968) - Published 29 July, 1968

ERRATA

Dynamics of Excited-State Annihilation in Nd ${Cl}_{3}$ .

W. D. Partlow

Phys. Rev. Lett. 21, 330 (1968) - Published 29 July, 1968

Second-Harmonic Generation by Damped Alfvén Waves and Helicons in Anisotropic Solid-State Plasmas.

W. R. Wisseman and R. T. Bate

Phys. Rev. Lett. 21, 330 (1968) - Published 29 July, 1968

Physical Review Letters

Volume 21, Issue 5

LETTERS

Self-Trapping with Picosecond Light Pulses

Distortion of Molecules in Intense Electric Fields

Vortex-Ring Formation by Negative Ions in He ii Under Pressure

Contribution to the Raman Line Profile in Liquids from Molecular Reorientation

Transport Properties of a Fermi Liquid

Electronic Properties of Liquid Water in the Vacuum Ultraviolet

Excitonic Insulator in GaAs Junctions

Soft Plasma Mode in GaAs

Optical Phonons in Solid Hydrogen and Deuterium in the Ordered State

Properties of the Knockout-Exchange Amplitudes in Nucleon-Nucleus Scattering

$1^{-}$ Neutron Particle-Hole States in ${}^{208}{Pb}$ Populated by Proton Decay of Analog Resonances

Spectroscopic Factors from ( $d, p$ ) Reactions

Nature of Cosmic Rays Underground

Predictions of Several oh $Λ$ Doubling Transitions Suitable for Radio Astronomy

Sum Rule for the Nucleon Mass

Crucial Test of a Theory of Currents

Unitarity and $TCP$ Invariance in $K^{0} \to 2 π$ Decay

$K_{1}^{0} K_{1}^{0}$ Threshold Enhancement in $π^{-} p \to K_{1}^{0} K_{1}^{0} n$ at 4 and 5 GeV/c