The Viscosity and Thermal Conductivity of a Completely Ionized Gas.

The general formulae for the first aproximations to the viscosity and thermal conductivity X of a mixed gas are evaluated for a completeyionizedgas. The results are ezpressed in terms of and for "corresponding" purely ionic or purely electronic neutral gases, com osed of equal numbers of positive and negative similar ions, or of positive and negative electrons, of e same temperature and number density (supposing that such particles could continue to exist together without transformation or recombination); the symbols for j# and X for such gases will be distinguished by the subscripts j and e. Numerical illustrations are given in two cases. For ionized atomic hydrogen, p is practically the same as p , and pa is much smaller; is about X0, and Xi is much smaller. For a gas composed of completely stripped atoms of atomic number 20 and atomic weight 40, the ionic fields of force are strong, their effective diameters are largc, and their mean free paths small; the values of , and (particularly) of Xi, are much less than those of p0 and Xi. The ions reduce p to about p6/30, and X to about X6/SO