The effect is given by Eq. (10), whose isotopic average can be worked out to any order in x using the methods of UFT393. The isotopic average gives the contact magnetic flux density in Eq. (11), used in hyperfine spin spin splitting in NMR. in the absence of the vacuum the contact term is zero as in Eq. (2). In the standard model this result is ignored, and replaced by the Dirac delta function as in Eq. (3). This is why mathematicians contemporary to Dirac thought that the physicists were indulging in total nonsense, until a new kind of mathematics of the Dirac delta function was developed. This can become formidably abstract and complicated, things that we seek to avoid in ECE theory. There are now many theories of the Dirac delta function, but I think that our new MZ theory, in which the vacuum induces shivering of the coordinate system, is much more elegant than the use of the Dirac delta function. Thanks to Horst for suggesting the method of this note. In the standard model there is a fundamental contradiction between Eqs. (2) and (3). In ECE2 there is no contradiction.