From 4th international seminar on heat and mass transfer in liquid metals; Trojlr, Yugoslavia (6 Sep 1971). See CONFTemperature profiles in an electrically heated ventical tube were measured in the Pe range 50 to 1000 (Pr approximately 0.007). Care was taken to minimize buoyancy effects. The eddy conductivity epsilon /sub H/ derived by fitting polynomials to the profiles. Prelima-nary values for epsilon /sub H/ and epsilon /sub H// epsilon /sub M/ ( epsilon /sub M/ based on the Re ichardt expression) are given and compared with earlier measurements. (auth)