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 310
Pliotograpliie en Ballon, by Tissandier. BALLOON PHOTOGRAPHY. 289 modern improvements in the art of constructing lenses, whichare now made of great focal lengths. In 1885 Tissandier andDucom employed one having a focal length of 22 in., and thisprobably represents the furthest limit likely to be… … Fig. 1S2.—The first photograph taken from a balloon in Austria. It representsthe Reichsbriicke in Vienna, and was taken by Viktor Silberer in 1885. their images on the same plate. One of these lenses is focussedon an aneroid barometer, and the other takes the view of thelandscape in the usual way.…
Aeronautics
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