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 262
ur way till two oclock in the afternoon, when wecame to the ground near Wichtenbeck without any injury to our-selves or the balloon. The peasants evidently thought we hadcome from the infernal regions. The results of Robertsonsobservations have been lost; but he was either hopelessly incom-petent… … Fig. 147.—Apparatus for generating hydrogen. 242 AIKSHIPS PAST AND PEE SENT. of its normal current, and that the atmospheric electricity waspositive, as examined by his gold-leaf electroscope. Neither did theair contain as much oxygen at great heights as it did on the groundlevel. Laplace induced…
Aeronautics
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