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    September, 1958
Anesthetized rats at Argone National Laboratory ride a toy train to get a dose of electron rays. Legs taped to flat cars, they pass under a particle accelerator. Electrons, streaming through holes in the metal bars, bombard a small area on the back of each animal. To determine radiation sensitivity, biologists measure the time the exposed skin requires to recover.

    September, 1958

    Anesthetized rats at Argone National Laboratory ride a toy train to get a dose of electron rays. Legs taped to flat cars, they pass under a particle accelerator. Electrons, streaming through holes in the metal bars, bombard a small area on the back of each animal. To determine radiation sensitivity, biologists measure the time the exposed skin requires to recover.