DOSE-EFFECT CURVES 



343 



Fig. 4. Theoretical dose-survivor curves described by Eci. 1 when, with h constant, 

 7n/r and n/s are assigned various integral values. See text. 



OJ O) (U 



> •> > 



0.6 l.or 



0.2 0,4 08 



Fig. 5. Frequency distributions necessary to explain shapes of survival curves on 

 basis of variation in radiosensitivity. See text. 



