Contents 1. Introduction 2. Geneml information about electronic melts 3. Theoretical formulae for various thermal conductivity components of the melts 3.1 Molecular thermal conductivity 3.2 Thermal conductivity connected with electronic processes of heat transfer 4 . Methods of measuring the thermal conductivity of melts 5 . Thermal conductivity of molten salts 6. Thermal conductivity of metal melts 7. Thermal conductivity of molten semiconductors 8. Conclusion References 3, For the positive sign of the thermoelectric power in solid and liquid metals see [29].4, Usually the value of RH is equal to or somewhat smaller than that suggested by free electron theory. The sign of RH is always negative. 16) [60], [114], [125], and [126] quote one and the same result for Bi,Te, obtained by Fedorov in [127]. 17) Electrical conductivity for calculation was taken: for Te from [30], [76], [212]; for ZnSb from [30]; for Bi,Te, from [78], [215]; for GeTe from [207]; for SnTe [207]; for PbTe from [207]; for 80 molyo Bi,Te,-20 molyo Bi,Se, from [218]; for TlTe from [217]; for TI2Te, from [216]; for Ag,S from [2lO], [214], [221]. 18) The melts of Ag,S, GaTe, Cu,AsSe,, and Cu,SbSe, behave similarly but in a somewhat more complicated manner. 19) This figure also gives data for the melt of solid solution of 74 molyo Sb,Te,-26 molyo Bi,Te,. Due to the absence of references on electrical conductivity data it was impossible t o estimate the ratio LIL, in the melt. of the compounds investigated.