SCIENCE
Balloon manufacturers once charged $100 each for sounding balloons not more than 40 inches in diameter. Now investigators of the upper air can get the same balloons for $2 each. Last summer five strings of such balloons, five in each string, were sent up periodically from San Antonio, Tex. to heights of 92,000 ft.(about 17½ miles). When the weakest balloon in the string burst, due to the thinning outside air, the rate of ascent of the other four was checked. When the second bag blew up, the remaining ones hovered practically stationary...
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