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 125
d its flight. Thisat any rate was the intention; but according to the reports ofthe Smithsonian Institute, there was a slight hitch in the pro-ceedings, which resulted in the sudden immersion of the airship.It was prevented from sinking by certain hollow cylinders, whichhad been thoughtfully fixed… … Fig. 57.—Professor Langleys flying machineat the moment of starting. must be created in orderthat the air may besufficiently compressedbeneath the sails. Themachine can then hoverin the air. The motorshave then their work to do in the shape of driving it forward. As a start, it would besatisfactory…
Aeronautics
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