30 



H. COTTIER, E. P. CRONKITE, E. A. TOKNA, AND N. O. KIELSON 



50 100 150 200 250 300 



Days post first exposure 



Fig. 1. Cumulative number of mice killed in a moribund state or dead with thymic 

 lymphoma plotted against the days post-exposure. Each hne represents a group of 32 animals. 

 B.W. = body weight. 



en 



c 



'>^ 



"CI 

 O) 



-D E 



> 



E 

 U 



50 100 150 200 250 300 



Days post first exposure 



Fig. 2. Cumulative and periodical (25-day periods) number of mice killed in a moribund 

 state or dead with thymic lymphoma plotted against time post-exposure. The *"*Co-y-irradiated 

 mice are pooled in one group of 96 animals, the other hues represent groups of 32 animals each. 

 B.W. = body weight. 



