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 309
pher wasperfectly correct in his attitude. Silberer pointed out that it wasunreasonable to allow one man to undertake a polar expedi-tion at his own cost and make all the exposures, while anotherman quietly developed them at home and claimed all the credit.The jury eventually agreed that this view… … Fig-. 181.—Triboulets panoramic apparatus.(From La 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…
Aeronautics
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