Of all the 3,352 animals exposed to the atom-bomb blast and radiation in the 1946 Operation Crossroads, none won greater fame than Pig No. 311. A wriggly, 50-lb. shoat, No. 311 was locked in the officers' head (toilet) of the Japanese light cruiser Sakawa. Hours later, after the Sakawa had sunk, No. 311 was found swimming gamely in the radiation-polluted waters of Bikini Lagoon. She was irritable, and had a low blood count, but 'within a month she seemed to have recovered.
Last week, the Navy's Medical Research Institute at Bethesda, Md. announced that it had given No. 311 as thorough and...