Abstract
It is well known that the electrical resistance of binary alloys may be divided into two parts: the thermal resistance and the residual resistance. This letter will be devoted to the residual resistance of disordered binary alloys. A first theoretical description of this property has been given by Nordheim (1931). His derivation is based on the quantum mechanical Boltzmann equation. He found the residual resistance go to be proportional to the product of the concentrations m A, m B, of the two metals (m A + m B = 1), so that

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