435(1): Experimental Determination of m(r)
In this note the Lamb shift is understood in terms of Eq. (6), from which m(r) may be determined numerically, because the quantities on the left hand side are known experimentally to high precision. For H lines that are not Lamb shifted, m(r) = 1. So m(r) becomes a fundamental spectral function of the generally covariant H atom. It is shown that there is no Lamb shifting the Dirac atom (cf. UFT430). This method has the great advantage of not having to model the m(r) function.