Volume 63, Issue 25

S. Teige, A. Beretvas, A. Caracappa, T. Devlin, H. T. Diehl, K. Krueger, G. B. Thomson, P. Border, P. M. Ho, M. J. Longo, J. Duryea, N. Grossman, K. Heller, M. Shupe, and K. Thorne

Phys. Rev. Lett. 63, 2717 (1989) - Published 18 December, 1989

Nuclear Physics

Measurement of the ${}^{3}{He}$ (n,γ $)^{4}$ He cross section at thermal neutron energies

F. L. H. Wolfs, S. J. Freedman, J. E. Nelson, M. S. Dewey, and G. L. Greene

Phys. Rev. Lett. 63, 2721 (1989) - Published 18 December, 1989

Atomic, Molecular, and Optical Physics

Nonlinear magneto-optics of vacuum: Second-harmonic generation

Y. J. Ding and A. E. Kaplan

Phys. Rev. Lett. 63, 2725 (1989) - Published 18 December, 1989

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Racetrack for competing viscous fingers

S. A. Curtis and J. V. Maher

Phys. Rev. Lett. 63, 2729 (1989) - Published 18 December, 1989

Plasma and Beam Physics

Quiescent window for global plasma modes

B. Coppi, P. Detragiache, S. Migliuolo, F. Pegoraro, and F. Porcelli

Phys. Rev. Lett. 63, 2733 (1989) - Published 18 December, 1989

Plasma jets from laser-irradiated planar targets

E. F. Gabl, B. H. Failor, C. J. Armentrout, N. D. Delamater, W. B. Fechner, R. A. Bosch, Gar E. Busch, Z. M. Koenig, D. Ress, L. Suter, and R. J. Schroeder

Phys. Rev. Lett. 63, 2737 (1989) - Published 18 December, 1989

Condensed Matter: Structure, Etc.

Dynamical phasons in a perfect quasicrystal

Peter A. Bancel

Phys. Rev. Lett. 63, 2741 (1989) - Published 18 December, 1989

Anomalous viscous behavior of superfluid ${}^{3}{He}$ at high magnetic field

T. Hata, S. A. J. Wiegers, R. Jochemsen, and G. Frossati

Phys. Rev. Lett. 63, 2745 (1989) - Published 18 December, 1989

Quasistatic measurements of the elastic shear constant of (KBr $)_{1 - x}$ (KCN $)_{x}$ and (NaCN $)_{1 - x}$ (KCN $)_{x}$

J. Hessinger and K. Knorr

Phys. Rev. Lett. 63, 2749 (1989) - Published 18 December, 1989

Structure of crystals of hard colloidal spheres

P. N. Pusey, W. van Megen, P. Bartlett, B. J. Ackerson, J. G. Rarity, and S. M. Underwood

Phys. Rev. Lett. 63, 2753 (1989) - Published 18 December, 1989

Critical dynamics and global conservation laws

P. Tamayo and W. Klein

Phys. Rev. Lett. 63, 2757 (1989) - Published 18 December, 1989

Observation of smectic-A ordering in a solution of rigid-rod-like particles

Xin Wen, Robert B. Meyer, and D. L. D. Caspar

Phys. Rev. Lett. 63, 2760 (1989) - Published 18 December, 1989

Condensed Matter: Electronic Properties, Etc.

Interaction of carbon monoxide with Fe(001)

N. B. Brookes, A. Clarke, and P. D. Johnson

Phys. Rev. Lett. 63, 2764 (1989) - Published 18 December, 1989

COMMENTS

Comment on ‘‘Icosahedral quasiperiodic ground states?’’

Arthur P. Smith and David A. Rabson

Phys. Rev. Lett. 63, 2768 (1989) - Published 18 December, 1989

Narasimhan and Jarić reply

S. Narasimhan and M. V. Jarić

Phys. Rev. Lett. 63, 2769 (1989) - Published 18 December, 1989

ERRATA

Do Steady Fast Magnetic Dynamos Exist?

John M. Finn, James D. Hanson, Ittai Kan, and Edward Ott

Phys. Rev. Lett. 63, 2770 (1989) - Published 18 December, 1989

Physical Review Letters

Volume 63, Issue 25

LETTERS

General Physics

Observation of fast sound in disparate-mass gas mixtures by light scattering

Gravitation and Astrophysics

Anomalous weight reduction on a gyroscope’s right rotations around the vertical axis on the Earth

Experimental bounds on interactions mediated by ultralow-mass bosons

Elementary Particles and Fields

Magnetic random-walk representation for scalar QED and the triviality problem

QCD β function with dynamical Wilson fermions

Measurement of the $Ξ^{0}$ → $Σ^{0}$ γ branching ratio and asymmetry parameter