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Summary The correction of Vaughan-Williams and Haas to Marshall's >" set of thermal conductivities for a fully ionized hydrogen isotope in the presence of a magnetic field is extended to the>. and 18 (or K) sets, and the high-field limits for the components perpendicular to the magnetic field are included. The results of Kihara, Midzuno, and Kaneko for the rate of entropy produc­ tion due to irreversible processes in an anisotropic plasma are then used to obtain the Onsager expressions for the reduced heat flow and the electric field respectively, when the magnetic field is zero. From these Onsager expressions Spitzer's expres­ sions for the absolute heat flow and conduction current density are obtained, with attendant derivation of relations between the scalar transport coefficients referred to earlier by Spitzer, Kaneko, and Seymour. Comparison of results obtained by Kaneko, Marshall, and Landshoff for the 2nd approximation to the scalar electrical, thermal, and thermoelectric transport coefficients of an isotropic deuterium plasma shows close agreement. The corres· ponding results of Spitzer and Harm in infinite approximation are also included for purpose of comparison. Finally, the influence of Marshall's corrected thermal conductivities on the radial heat flow approximation in Seymour's earlier analyses of a radially con­ stricted deuterium plasma between electrodes is considered, and it is shown that the original basic approximation of perfect thermal insulation at the free boundary surface of the plasma can still be made more plausible in the limit of a strong external guiding magnetic field, provided that this magnetic field corresponds to the more stringent inequality w'7'>1400 (w the electron gyrofrequency, 7 the electron collision time) for highly ionized deuterium, rather than the inequality w7>1 which appeared in the earlier analyses.

Remarks on the Transport Properties of a Fully Ionized Gas with Application to a Radially Constricted Gas Discharge