Like telephone poles along a highway, the dots and dashes of radio-beacons guide a pilot along U. S. airways. But if he wanders off the route in fog, storm or darkness, a pilot may find himself off the line of the beckoning signals just when he needs them most. Last week was brought forth a device by which the flyer, wherever he be, will be able to orient himself upon the nearest commercial broadcasting station.

The direction finder or "homing device" invented by Radioman Geodfrey G. Kruesi of Western Air Express is supplementary...

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