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 25
e of the atmosphere, any vacuum apparatuswould have to be constructed of metal and must be of greatsize. Its consequent weight made the whole thing impossible,and arguments of this nature might well be considered by someof the inventors who are still at work on the problem. Hisconclusions, which… … Fig. 3, -The flying ship, designed by-Francisco de Lana. THE EAELY HISTORY OF THE ART. 5 which the one may be called aerostatics, and the otheraerodynamics. Aerostatical devices include those in which theload is lifted by filling certain spaces with a gas which is lighterthan air, whereas in…
Aeronautics
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