iL? OQ, ¢ Minutas-Bloredical Preeccs arch 6 and J The atam bomb radiation dose required fur the LO. of this cpectes cen then 5 © compsred with the doee required wien letoratory radfations ere wed. 1.1 There vas so discuesion of tha strain of nica to te used, The selection of LAF, bed been bssed on its extene sive use in lethal Asse studies at the Betlonal Institute of Eealth. BEST AVAILABLE COPY 1.4 There was conelderatie Aiscussica of the age-cistribuve $iem of the animale. It wee pointed out thet Ideally a rerrezentative perulation containing ell eses would most rearly eppreaimate the conditices ef the uz4 of atva hogs im werfare. Serger, the eatrapalation frau ice to pen fe mct Cealratia. xhet {8 desired le the wcsyariecd of j~k HEY gacee radiation, with gasses end x-rediation of energies wreally ued Sa experizentsl medicine. Sach @ comperiagog vill te ucefaul in evaluating experiscntal therapy, etc. For this linited goal, it is proper to vors with a reatricted eze grow. There is iittiea wriatica ta the Logg versus age {a mice in the age group 8-10 week to 1 year. The proposed test conditions specify mice 8-12 weeks cll; Therefore they Vill te setisfectory. SAN BRUNO FRC