Electron Spin and Radiative Reaction. P. F. BROWNE. University of Manchester Institute of Science and Tl:chnology, Manchester 1, England. Spin effects are extracted from the Lorentz-Dirac equations of motion of a point charge without the introduction of additional empirical parameters. The effective motion of the particle is distinguished from the motion of the point electron which performs a classical Zitterbewegung. Introducing parameters to describe the effective motion, radiative reaction disappears and spin angular momentum appears. A new condition for the rate of radiation emerges. The Chimeron Model of the Intermediate Vector Boson W. S. F. TUAN. Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii. This p,zper proposes to mediate the weak interactions with charged vector bosons which are given strong pair-wise interactions with the hadrons (couplingfw l), and which are identified with the “a” particles of T. D. Lee-these are particles having nonvanishing charge QK corresponding tb the C&even part of the electromagnetic current. A mismatch model of Lee is adapted here to illustrate the prominent features of the W * =- a l “Chimeron” theory in the limit that the strong interactions are SL1(3) conserving. It is shown that a relatively stringent additional constraint is needed to make the f - 1 type Chimeron theory viable. The pattern of mismatch which leads to CP nonconservation when SU(3) breaking and electromagnetic interactions are introduced, is considered. An alternative W = a model proposed by Okun and Rubbia which employs universal definition of C, P, T without SL1(3) symmetry is also presented and shown to lead to very different empirical consequences; in particular the pair-wise coupling f of the a-fields to normal hadrons must now be reduced to 1Om2-1O-3. Finally the experimental implications of the strong (f- 1) IV* = a* theory are discussed. Higher Order Kinetic Theory of Excitations in He II and Spontaneous Instability in a Counter Current. S. E. GOODMAN AND P. G. SAFFMAN. Department of Applied Mathematics, Firestone Lab., Cal. Inst. of Tech., Pasadena, Cal. The kinetic theory of excitations in flowing liquid He II is developed to a higher order than that carried out previously in order to demonstrate the existence of nonequilibrium terms of a new nature in the hydrodynamic equations. It is shown that these terms can lead to spontaneous destabilization in counter currents when the relative velocity of the normal and super fluids exceeds a critical value depending on temperature. The critical velocities are estimated to range from 14 to 20 m/set, but tend to zero as T 4 TA . ParticIe-Like Behavior. M. MURASKIN AND T. CLARK. University of North Dakota, Grand Forks, N. D. We study the field theory previously introduced by one of the authors (M. M.) by means of a finite difference approximation using a computer. We focus attention on particle-like behavior centered at an arbitrary origin. We find in the two examples under consideration that one kind of particle-like property induces other particle-like properties to also appear as a consequence of the dynamics.