S. E. LURIA AND R. DULBECCO 



Figure 5. — The probability w of reactivation for phages T2 and TZr 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 a: =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 n = 25, a:=0.15. Solid line: theoretical 

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

 as a function of r f or « = 25, a: = 1 .3. 



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