We have determined the solute contribution &rgr;i(T,c) of the solutes Cr, Mn, Fe, Co, and Ni in copper and of the solutes Mn, Fe, and Co in gold over the temperature range 4° to 1200°K and over a wide range of solute concentrations. The parameter &rgr;i(T,c) for a given solute is defined here as the difference &rgr;i(T,c) =&rgr;alloy(T,c)—&rgr;solvent(T). The temperature dependence of &rgr;iis quite complicated for several of the solutes, in particular, Fe and Co. For example, in an alloy containing 0.05 at.%Fe in copper this quantity &rgr;Feexhibits a minimum at 25°K and a maximum at 65°K. Alloys of Fe in gold exhibit a broad maximum in &rgr;Feat temperatures between 70° and 200°K, depending upon the iron concentration. In all the alloys investigated, except for Ni in copper, &rgr;idecreases with increasing temperature in the region of high temperatures (above about 500°K).