Controlled hydrogen fusion−the key to cheap, abundant energy−is still miles away but it is getting closer. After a two-day conference at Princeton, N.J. last week, U.S. and British atomic officials made the guarded announcement that several different approaches to the fusion problem have "for some months been yielding substantial numbers of neutrons . . ." These neutrons, the announcement explained, may come from the energy-yielding fusion of deuterium (heavy hydrogen) nuclei. If the scientists can prove that they do, an important step will have been taken toward controlled fusion.
Under a special arrangement, British and U.S. scientists are exchanging information...
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