Science: Measuring the H-Bomb

When the Atomic Energy Commission allowed observers, including newsmen, to watch a thermonuclear test at Bikini atoll in late May, it told them practically nothing and got them out of the test area as quickly as possible. The rest of the tests were supposed to be secret.

They were not, however, kept entirely secret. Long-range atom-bomb watching has become a favorite sport in Japan. When nuclear tests are impending, whether by the U.S. or the U.S.S.R., all sorts of instruments are checked and tuned for superfine sensitivity. This year a survey ship, the Shunkotsu...

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