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 207
Fig. 114.—Different kinds of grapnel.(From Moedebecks Pocketbook.) parts of the construction, and would appear to offer no advantagesas compared with the use of the ripping-cord. Ballast is keptin strong bags of sail-cloth, from 12 to 15 in. high, and 8 to12 in. in diameter; they are suspended by…
Aeronautics
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