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 340
Fig 199.—Mont Blanc, as seen from Geneva ; taken by the Vega CompaujjTo face page 317. J … with a lens having a focal length of ten inches. - ■ ^m? % -■ •& jfe ,, -; - •• -r;^ . fc^K 4*0 Jb i$L££ k_ - (A >ift *,:F /-? * ^BB HiH^ii- ,... jfty mi ;%i-r. • I :,& ftrttt&V . i^&4* i : 1 jth a telephotoscopic lens of focal length fifty-three inches on a whole plate.…
Aeronautics
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