SCIENCE
One balmy spring night last week two men were alone in a big brick building on the Princeton University campus. Physics Professor Rudolf Walter Ladenburg, 53, and Research Associate Cletus Clinton Van Voorhis, 50, were so interested in their atom-smashing experiments that they had come back to the physics laboratory to work after dinner. For bullets they used neutrons. The neutrons were knocked out of beryllium by alpha particles from radium. The beryllium and 200 milligrams of radium sulphate, worth $4,000, were in a metal tube. One of the scientists started to solder...
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