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 142
Fig. 74.—Kite forsignalling. Fig. 75.—Signalling by means oflights from a kite. and Eussia to hoist an observer in a kite. The first load was adummy of suitable weight, and on January 27th, 1897, anAmerican officer went up. The velocity of the wind was 23 ft.per second. Four Hargrave kites were…
Aeronautics
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