Science: New Wrinkles

Smallest Transmitter. A 20-mm. shell is less than an inch in diameter, but Roy J. Smollet of the Naval Ordnance Laboratory, Silver Spring, Md., has built a radio transmitter that fits into its nose and leaves room to spare. The transmitter has one transistor, a coil half an inch across, and a mercury battery considerably smaller than a dime. When the shell is fired, it sends out a wave that tells how the shell is spinning and whether it is wobbling in its flight.

Radiation Spotters. The National Bureau of Standards has worked out for the Atomic Energy Commission a handy system...

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