Thermal conductivity for hydrogen as function of mass density for several constant temperatures T. Dashed lines show the traditional conductivities , and dotted lines display the conductivities enhanced by the F factor in Eq. (11). The solid and dot-dashed lines show the conductivities with the weakly and strongly damped corrections given by Eq. (12), and , respectively. They provide two different transitions from the new calculations for partially degenerate electrons to the traditional results in the strong degeneracy regime (see details in the text). Numbers near the curves mark log T(K) values.