Medicine: Alimentary FM

Walkie-talkies had not been invented in 1910, when Humorist Robert Benchley delivered his uproariously unmedical lecture, "Through the Alimentary Canal with Gun and Camera," so the imaginary expedition from gullet to fundament could make no on-the-spot broadcasts of its progress. Last week Manhattan's Rockefeller Institute for Medical Research announced the development of a tiny capsule FM transmitter that can make just such broadcasts. It is small enough (|⅛in. long, 4/10 in. in diameter) to be swallowed like an oversized pill. Conceived by New York Physician John T. Farrar, the plastic-encased transmitter was...

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