  We show two results about the Conway potential function which is known as the
normalized multivariable Alexander polynomial. We first show that the Conway
potential function introduced by Kauffman in "Formal Knot Theory" is indeed a
link invariant. Next we show that Kauffman's potential function equals
Hartley's potential function. We will prove it by using Murakami's axioms for
the multivariable Alexander polynomial.
