Science: Energy into Mass

In Paris last year the Curie-Joliots bombarded a piece of lithium with alpha particles, produced neutrons and boron atoms. The scientific world at that time was engrossed with neutrons whose existence Cambridge University atomic physicists had just discovered (TIME, March 7, 1932). The significance of the boron atoms in the Curie-Joliot experiment attracted less attention until last week Dr. Kenneth T. Bainbridge, who weighs atoms at Bartol Research Foundation laboratories in Swarthmore, Pa., presented an interpretation.

The fact that boron atoms and neutrons resulted when alpha particles struck lithium atoms confirms the Einstein...

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