Science: Trail's End

For a comparatively young man (he is 32), amiable, dimple-chinned Dr. Carl David Anderson of California Institute of Technology has accomplished a great deal in science. In 1932 he snapped the first picture of a positive electron. For this discovery he won the highest honor Science can bestow, a Nobel Prize. His pioneer positive electron photograph has become historic. In the Physical Review last week, Prizeman Anderson printed a snapshot of another kind of particle which may also become historic.

The existence of "heavy electrons," also known as X-particles or barytrons, was...

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