Effects of X-Rays on Erythrocytes Irradiated in vitro

IRRADIATION of erythrocytes with X-rays in vitro causes hæmolysis. The dose of X-rays required to obtain complete hæmolysis is influenced by the concentration of the erythrocyte suspension and by the medium. A state of resistance to hæmolysis results when a dose of two million r. is given to an erythrocyte concentration of 0·1 per cent or less in normal saline 1 . The question arises, whether these erythrooytes are resistant to other hæmolysins or only to the X-rays producing this stable state.