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 215
Fig. 120.—Balloon basket and its contents. journey; the gas soon becomes adulterated by diffusion, and itisnot generally possible to anchor an inflated balloon. Sometimesa balloon can be loaded with ballast and left in its inflated con- … Fig. 121.—Vollbehrs microphotoscope for reading maps on a reducedscale, together with, illuminating device for night work. dition during the night, if the weather is very fine ; then on thenext day it is possible to continue the journey with a smallernumber of passengers than before. Things are…
Aeronautics
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