Abstract
IT has recently been reported in the daily Press that an attempt is shortly to be made by balloon ascent to reach higher altitudes than 61,000 ft. (pressure 50 mm.) claimed to have been reached by Prokofiev and his companions in the U.S.S.R. balloon. It is to be recalled that observations were made by Regener in 1932 using self-registering apparatus attached to rubber balloons up to a pressure of 22 mm. It was reported that the American balloonists Settle and Fordney reached a pressure last autumn of about 64 mm., whilst the minimum pressure from the records of the Belgian flights of Cosyns, Kipfer and Piccard was 73 mm.
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Experiments in the Stratosphere. Nature 133, 15–16 (1934). https://doi.org/10.1038/133015a0
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DOI: https://doi.org/10.1038/133015a0