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 138
Fig. 70.—Other shapes of Hargrave kites. 118 AIRSHIPS PAST AND PEESENT. which it was possible to extract sparks 10 ft. long. Many scientificmen followed in his footsteps, and applied his methods to thestudyj)f atmospheric electricity, and in Philadelphia a club wasfounded for the purpose, called…
Aeronautics
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