Butting In

> In Manhattan's Advertising Club on Park Avenue, a man was making a speech. Suddenly, to the amazement of the audience, the mike in front of the speaker's mouth burst into music.

> In the Chanin Building on nearby Lexington Avenue, a lawyer named Arthur Knox was listening to a visitor in his 42nd-floor office. Hard-of-hearing, Mr. Knox was wearing an electrical earphone. All of a sudden he began to hear a description of ice-skating at the World's Fair's Sun Valley.

These mysterious interruptions were traced to television. They had come from NBC's Station W2XBS in the Empire State Building, which two months ago began to broadcast the first regular television programs in the U. S. To the dismay of engineers, television's sound effects were picked up by many another unlikely gadget. Television interference also came in on numerous Manhattan radio receivers, including Journalist Dorothy Thompson's, over the whole dial.

By last week NBC was busy handling dozens of complaints from irate people whom television sounds kept butting in on. To radio fans NBC in desperation sent six pages of technical instructions on how to eliminate television's interference. Mr. Knox got another type of earphone and waited for the next squall.

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