Failures and successes of the attempts by the co-operative venture of the National Geographic Society and the United States Army to put into the air two great stratosphere balloons, by far the largest ever constructed. Advantages to be gained with such very large balloons. Details of the successful launch of the Explorer II. Possibilities or improbabilities of escaping the gravitational force of the earth. The practical limit for high altitude flying, commercially. Measuring cosmic rays on the Explorer II. The purpose of flying in the stratosphere. Obtaining data on cosmic radiation and on the amount of ozone present at high elevations. Getting additional data on the temperature of the air, and the pressure at elevations reached as compared with measurements of the same elevation by means of aerial cameras. Scientific experiments carried out on Explorer II, and equipment taken to do so. Details of how the equipment worked. Some of the findings. Temperatures experienced at various times during the flight. Outgoing and incoming signals. Communicating with a newspaper man in London at 13,000 feet. Conditions at various elevations. The landing.
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