Almost simultaneously with the discovery of the Lamb-shift another peculiarity was found by Kusch and his collaborator Foley, which made it clear that the magnetic moment of the electron is somewhat larger than had been assumed before.
Halos sabay-sabay sa pagkatuklas ng Lamb-maglipat ng isa pang di-karaniwan ay natagpuan sa pamamagitan ng Kusch at ang kanyang mga tagatulong Foley, na ginawa ito ng malinaw na ang batubalani sandali ng elektron ay medyo mas malaki kaysa sa had been assumed bago.