S. E. LURIA AND R. DULBECCO 



Figure 5. — The probability w of reactivation for phages T2 and T2r as a function of the dose 

 of irradiation r (in hits per particle) for several multiplicities. Abscissae: values of r. Ordinates: 

 values of w. 



# values of w for x =0.1-0.2. 



O values of w for a; =0.8-1. 5. 



-+- values of w for x = 2.5-4.0. 



Broken line: theoretical curve for y as a function of r for w = 25, x =0.1 5. Solid line: theoretical 

 curve for y as a function of r for w = 25, x=0.6. Broken and dotted line: theoretical curve for y 

 as a function of r for n = 25, .r=1.3. 



28 3 



