Science: Ultimate Particles

Yale last week stood forth on the busy field of subatomic exploration with a new conception of the neutron. The week prior, Cambridge had brought into the field evidence of "positrons" (positive electrons).

The neutron, since Cambridge's Dr. James Chadwick discovered it last year (TIME, March 7, 1932), has been considered an electrically inert combination of proton and electron. Two pictures of the combination have developed: 1) the heavy proton and the light electron bound together much like a dumbbell; 2) the electron hugging the proton like an onion peel. Such combinations should knock...

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