A steady-state plasma, confined by a cold-gas blanket in a toroidal magnetic field, is stable against magnetohydrodynamic instabilities. A ring whirl will help to define the equilibrium position, to stabilize against deviations from the steady-state, and to allow a poloidal field component.

The superfluid density near $T_{\lambda }$ is found to vary as ${(T_{\lambda }-T)}^{\zeta }$, where $\zeta =0.666\mathrm{}\pm 0.006$, and the Josephson relation between the specific heat and the superfluid density is tested experimentally. It is shown that, assuming the Widom-Kadanoff scaling laws, the superfluid coherence length varies as ${(T_{\lambda }-T)}^{-\zeta }$.

The neutron-proton spin-correlation parameter, $C_{\mathrm{NN}}$, has been measured at ${\theta }_n=140\mathrm{} \mathrm{and} 174°$ c.m., by scattering polarized neutrons from a polarized proton target. Comparison to recent phase-shift analyses is made, and a sensitivity of the $S-D$ coupling parameter to the data is noted.

The strong coupling of the giant resonance to the surface vibrations in ${\mathrm{C}}^{12}$ results in the splitting of the single one-particle, one-hole, $1^{-}$ collective state into several components, thus improving the agreement between theory and experiment to a very large extent.

Atomic resonance fluorescence is examined as a scattering problem, and Goldberger-Watson double poles are found to occur in situations producible in the laboratory. Systematic study of this effect and associated nonexponential decay thus appears possible.

Evidence is presented that the long-lived neutral $K$ is heavier than the short-lived.

New values for the three decay asymmetry parameters in the nonleptonic decays of $\Sigma$ hyperons are presented. The selection rule $\Delta I=\frac{1}{2}$ is found to be well satisfied.

If there are two meson-baryon resonances or bound states with opposite parities but with the same remaining internal quantum numbers including signature, one at c.m. energy $W_1$ with $l=J-\frac{1}{2}$ and the other at $W_2$ with $l=J+\frac{1}{2}$, then the residue of the Regge trajectory on which they lie must change sign between $W_1$ and $-W_2$. Consequences of the exchange of such a trajectory to backward elastic scattering are discussed.

An anomalous increase of the thermoelectric power in semiconducting, $p$-type Fe${\mathrm{Cr}}_2$${\mathrm{S}}_4$ is found near the Curie temperature. Analysis of the Fermi energy indicates that this effect is apparently due to an additional kinetic energy which the charge carriers acquire through magnon-hole interaction.

We have measured spectral-response curves of superconducting point contacts suggesting the existence of frequency-dependent Josephson current amplitudes peaking in the vicinity of the energy gap. These point-contact Josephson junctions respond sensitively and with high speed to millimeter and submillimeter radiation. Radiation emitted to free space by one such junction was detected by another junction.