Balloons Radio Data from Stratosphere To Scientist. Pasadena, Calif. Balloons carrying weather recording and broadcasting apparatus are being flow to the stratosphere from atop the roof of the California Institute of Technology. Developed by Louvan E. Wood, the weather recorder continuously records air pressure, temperature and humidity which is, in turn, broadcast to a receiving set on the ground by a tiny transmitter also attached to the balloon. The equipment weighs about one pound. The balloon is flown to altitudes of 60,000 feet. It is hoped that the balloon apparatus will take the place of costly airplane weather testing flights now being used. PHOTO SHOWS: Louvan E. Wood, with the stratosphere robot balloon. Excluding the balloon and parachute, the weather instruments, which weigh together less than three ounces, include a minute aneroid barometer, a bi-metallic strip that serves as a thermometer, and a hair plucked from Wood's head that measures humidity. Moved by a special watch that ticks twenty times a second and forms a vital part of the balloon's cargo, a metal hand that serves as a watch hand rotates slowly. When the hand touches an arm attached to the barometer, a contact is made that broadcasts a signal. As air pressure decreases, the position of the barometer hand changes. This makes the pressure signal contacts father apart.

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