By making very small mean-free-path films we have been able to measure the intrinsic nature of resistive transtions as a function of mean free path. Analysis based on the concepts of Anderson and Josephson leads to an estimate of the smearing of the transition near zero resistance.

We have calculated the generalized susceptibility $\chi (\overrightarrow{\mathrm{K}}, \omega )$ of paramagnetic nickel at $1.6T_c$ using a simple five—$3d$-band model in tight-binding approximation and compared it with neutron-scattering measurements. The only adjustable parameter was the exchange enhancement, considered to arise from an effective Coulomb interaction $I_{\mathrm{eff}}\left(\overrightarrow{\mathrm{r}}\right)$ in the random-phase approximation. Our analysis is consistent with the interaction being dominated by the on-site term at $\mathcal{r}=0\mathrm{}$, the relative contribution from any one nearest-neighbor position coming to less than 10%.

We present arguments that militate against Weiner's recent proposal that neutral leptonic currents exist, and against the variants of his proposal of strange leptons that involve charged strange leptons. A modified scheme with the addition of only the strange neutrinos, or of only one of them and its antiparticle, is in agreement with the predictions of the Cabibbo theory with the exception of neutrino-induced reactions.

The energy spectrum of high-energy cosmic-ray muons was measured at an angle of 75° from the vertical. The results show that the direct muon production inferred from underground measurements of muons with energies over 1000 GeV is not observed in these spectrograph measurements at energies up to 300 GeV.

From a measurement of the total polarization of the muon, we have determined the parameter $\xi \left(q^2\right)$ in the decay $K^{+}\to {\pi }^0+{\mu }^{+}+\nu$.

The $A_2$ trajectory and residue functions are obtained and are found to change sign around $t=-0.5\mathrm{}$ Ge${\mathrm{V}}^2$. This strongly suggests the Chew or the no-compensation mechanism of ghost elimination. The trajectory parameter $\alpha \mathrm{}\left(t\right)\mathrm{}$ also agrees well with existing estimates.

Kronecker deltas in angular momentum for weak processes are shown to be required by current algebra and conspiracy relations. Theoretical and experimental consequences of such nonanalytic pieces are discussed.

Reasonable fits to invariant-mass, momentum-transfer, and Treiman-Yang angle distributions for the reaction $\mathrm{pp}\to {\Delta }^{++}p{\pi }^{-}$ at 6.6 GeV/c are obtained from a double-Reggepole model with pion exchange.

A recalculation of the $g$-factor anomaly of the free electron, based on the data of Wilkinson and Crane, results in the value $a=0.001\mathrm{}159557\pm 30\times {10}^{-9\mathrm{}}$. This is lower than theoretical estimates by more than the quoted experimental error.

Employing the usual techniques of the algebra of currents and the Weinberg spectralfunction sum rules, expressions are obtained relating the parameters ${\lambda }_{+}$, ${\lambda }_{-}$, and $\xi$ in $K_{l3\mathrm{}}$ decays. If one neglects the ($0^{+}$) kappa ($\kappa$) meson contribution, a comparatively large value of ${\lambda }_{-}$ (an order of magnitude larger than ${\lambda }_{+}$) is predicted. This is in agreement with the present experimental data. It is also shown that $\xi {\lambda }_{-}$ should be small and comparable with ${\lambda }_{+}$.

Theoretical results, obtained from the coherent superposition of the waves scattered from the individual atoms, are presented for the spin polarization of 300-eV electrons scattered by ${\mathrm{C}}_2$${\mathrm{H}}_5$I and ${\mathrm{I}}_2$ molecules, and are found to be in good agreement with experiment.

Stimulated thermal Rayleigh scattering that has been seen previously in absorbing liquids has been observed in gaseous nitrogen and carbon dioxide using small amounts of N${\mathrm{O}}_2$ and ${\mathrm{I}}_2$ to produce absorption. The anti-Stokes shift of half the half-intensity width of the incident light, thresholds, gain narrowing, and critical absorption coefficients were observed.