Table 1. Adult and Juvenile Animals Used in the Phase I Feasibility Study I.V. Dose Cow #1 Pu 83 mCi I.V. Dose 9.95 10.6 10.6 10.7 238 : Weight (kg) 641 Pu mCi mi mi mi Time After First Dose (hours) 144 168 192 Age (Years) 4 Weight (kg) 614 Sacrifice Time After Dosing 90 hours Age (Years) Sacrifice Time Post Initial Dosing (days) 3 13 c8T Cow #2 238 Calf Number Dose #2637 174 wCi in vivo plu- tonium-labeled Location of Calf During Age at Beginning of Study Pre-Study Weight Sacrifice Weight Age at Sacrifice Study Sex Metabolism Room Male 6 45.0 44.6 17 Metabolism Male 6 35.9 36.8 17 (days) (kg) (kg) (days) milk #2638 153 uCi tn vivo plutonium—-labeled Room milk #2641 Control Metabolism Male 6 43.2 40.0 17 #2634 Control Outside Male 6 35.5 48.2 17 Room Pen