Volume 21, Issue 17

J. R. Chen, J. Sanderson, J. A. Appel, G. Gladding, M. Goitein, K. Hanson, D. C. Imrie, T. Kirk, R. Madaras, R. V. Pound, L. Price, Richard Wilson, and C. Zajde

Phys. Rev. Lett. 21, 1279 (1968) - Published 21 October, 1968

$K^{+} p$ Backward Scattering in the Region from 1.0 TO 2.5 GeV/c

A. S. Carroll, J. Fischer, A. Lundby, R. H. Phillips, C. L. Wang, F. Lobkowicz, A. C. Melissinos, Y. Nagashima, C. A. Smith, and S. Tewksbury

Phys. Rev. Lett. 21, 1282 (1968) - Published 21 October, 1968

$K^{+} p$ Scattering and a Possible $Z^{*}$ Resonance

B. R. Martin

Phys. Rev. Lett. 21, 1286 (1968) - Published 21 October, 1968

Negative Pion Production from Neutrons by Polarized $γ$ Rays

T. Nishikawa, S. Hiramatsu, Y. Kimura, M. Kobayashi, K. Kondo, S. Okumura, T. Suzuki, K. Takikawa, T. Tsuru, and H. Yoshida

Phys. Rev. Lett. 21, 1288 (1968) - Published 21 October, 1968

Empirical Formula for the Baryon Mass Spectra

Gerald Rosen

Phys. Rev. Lett. 21, 1291 (1968) - Published 21 October, 1968

Finite-Energy Sum Rules for $π N$ Scattering at $u = {(1236 MeV)}^{2}$

Boris Kayser

Phys. Rev. Lett. 21, 1292 (1968) - Published 21 October, 1968

Integrally Charged Quarks and $2 γ$ Decay of $π^{0}$ and $η$

Jun Otokozawa and H. Suura

Phys. Rev. Lett. 21, 1295 (1968) - Published 21 October, 1968

ERRATA

Magnetostriction and Thermal Expansion of Pd and Paramagnetic pd:ni Alloys

E. Fawcett, E. Bucher, W. F. Brinkman, and J. P. Maita

Phys. Rev. Lett. 21, 1299 (1968) - Published 21 October, 1968

Physical Review Letters

Volume 21, Issue 17

LETTERS

Observation of Hyperfine-Enhanced Nuclear Magnetic Cooling

Production of High-Energy Neutral Atoms by Scattering of Ions at Solid Surfaces and Its Relation to Sputtering

Cyclotron-Harmonic Plasma-Wave Echoes

Experimental Thermal Conductivity of Two Dilute Solutions of ${He}^{3}$ in Superfluid ${He}^{4}$

Critical-Region Second-Sound Damping in He II

Effect of Temperature and Magnetic Fields on the Thin-Film dc Superconducting Transformer

Simple Interpretation of the Josephson Effect

Angular Dependence of Spin-Wave and Plasma-Wave Propagation in a Degenerate Electron Liquid

New Absorption Phenomenon for Transverse Ultrasonic Phonons in Superconductors Near $T_{c}$

Superconductivity of Cerium Under Pressure

New Model for Interface Charge-Carrier Mobility: The Role of Misfit Dislocations

Structural Phase Transitions in Perovskite-Type Crystals

Localized Magnetic Mode in Mn $F_{2}$ : ${Fe}^{2 +}$

Brillouin-Scattering Study of the Ferroelectric Transition in K $H_{2}$ P $O_{4}$

Direct High-Energy Photoprotons from ${}^{12}C$

Energy-Dependent Structure in Backward-Hemisphere $\bar{p} p$ Elastic Scattering and High-Mass Bosons

Test of Time-Reversal Invariance in Elastic Electron Scattering from the Deuteron

Study of the Reaction $π^{+} n \to π^{0} π^{0} p$ at 2.15 BeV/c

Test of Time-Reversal Invariance in Electroproduction Interactions Using a Polarized Proton Target