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 197
her are sure to arise, added to which theiron will probably be rusty, and the sulphuric acid will certainly V 176 AIKSHIPS PAST AND PEESENT. contain impurities. It will therefore be found that in^actualworking about 20 per cent, more sulphuric acid and iron will berequired than is allowed for in… … Fig. 104.—Ascent of a captive balloon in calm weather. The car contains Colonel Vives y Viches, of Spain, Lieutenant von Corvin, ofAustria, and Captain Sperling, of Germany. ferrous sulphate on the surface of the iron. The so-calledcirculation system was therefore introduced as an improve-ment, by…
Aeronautics
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