Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon (1908)
Hildebrandt, A. (Alfred), b. 1870, Story, W. H. tr · New York, D. Van Nostrand company · leaf 292
Suringsucceeded in reaching a level of 35,500 ft., which is probablythe greatest height at which existence is possible. A balloonwith a capacity of 300,000 cubic feet was used, and in the middleof July, 1901, a trial trip was made, Berson and Suring beingaccompanied by Dr. von Schroetter of Vienna.… … Fig. 171.—Bavo-thermo-hygro-graph, designed for recordingballoons by Dr. Hergesell,and made by Bosch, ofStrassburg:. 272 AIKSHIPS PAST. AND PEE SENT. underwent was curious. Bert had placed himself in a vacuumchamber, where the pressure had been reduced to 975 in. ofmercury in 85 minutes. A man…
Aeronautics
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