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 332
, and interferes withthe sharpness of theimage. It may becomea serious matter in a balloon; fine particles of sand from theballast sacks float all over the basket, and have a habit ofpenetrating everywhere, even through the tightest joints. Plates. Usually everyone settles for himself the plates to… … Fig. 195.—Aiguille Verte, taken with anordinary lens by the Vega Company, ofGeneva. 312 AIKSHIPS PAST AND PBESENT. But in balloon work, certain plates must be used if good resultsare to be obtained, though doubtless there is a certain latitudeallowable. Films are light and convenient, but the…
Aeronautics
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