A re-examination of the problem is reported. The results for the vector and scalar cases in the case of the deuteron are explained in terms of known correction factors for the one-body problem. For the vector equation part of the result is caused by an induction effect which is the meson theoretic generalization of Faraday's law of induction. In the scalar case the relation to the one-body result is made in a form employing an effective change in mass caused by the presence of the scalar. These interpretations are substantiated by an analysis in terms of plane waves. Simple forms are obtained for one particle in a pseudoscalar field and a tentative application to the deuteron is made and criticized.

• Received 10 December 1952

DOI:https://doi.org/10.1103/PhysRev.89.1177