“…In conformity with the findings in unconcentrated sera from newborns (35,52,63,71) the "witch's milk" lacked substances related to /?2A-and /?2M-globulins, but showed the presence of material react ing with anti-y-globulin antibodies. It should be noted, how ever, that this "y-globulin" obviously was not antigenically identical to serum y-globulin as it was lacking in the determinants of the Bence-Jones proteins, which on the other hand were found in the scrum y-globulin from the children producing the milk.…”