526 



DOROTHEA STARBUCK MILLER 



TABLE VII 



Changes in Incidence of Audiogenic Seizures in Four Groups of Mice 



BEFORE AND AFTER MaY, 1957 " 



' Figures in ordinary t>pe: tested October, 1956 to May 1, 1957. Figures in Italic type: tested May, 

 1957 to October, 1957. 



TABLE VIII 



Changes in Incidence of First Trial Fatal Audiogenic Seizures in 



Three Groups of Control Mice during 27 Months of Changing 



Rate of Radioactive Fallout'' 



Interval^ 



Relative" 

 fallout 



Incidence of fatal seizures (%) 



Fi 



Backcross 



DBA/1 



^ Numbers in parentheses are numbers of mice. 



'' Mice were born during this interval and tested 30 days later. 



<^ See text for explanation of arbitrary relative figure. 



■* Mouse quarters were scrubbed thorouglily in June, 1958. 



