Science: Cosmic Clearance

(See front cover)

At 10 a. m. on Jan. 1 the high-banked seats of a lecture amphitheatre at Washington University were jammed with a capacity crowd of 300—mostly scholars, a few newshawks, a handful of laymen. In the doorways and the hall outside a hundred more strained their ears. This was but one of a thousand discourses made last week at the midwinter talk carnival of the American Association for the Advancement of Science in St. Louis. But for most of the audience it marked the end of the "mystery" of cosmic rays,...

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