AbstractThe densities of liquid lead and of liquid nickel-lead solutions containing up to about 3.5 atomic per cent nickel were measured as a function of temperature using a modified Archimedean method. It was found that the densities of the nickel-lead solutions were greater than that of pure liquid lead and increased with increase in nickel content. Partial molal volumes for nickel and lead were then determined by the method of intercepts. The results indicate that for the composition region investigated the partial molal volume of lead does not differ significantly from the molal volume of lead and the partial molal volume of nickel approaches a value of zero at high dilution.