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 359
itable stops. The filters usedby Miethe allow of stops of F/45, F/68, and F/15 for the red, 334 AIESHIPS PAST AND PEE SENT. green, and blue respectively. The speed of the shutter is arrangedto suit the prevailing light, and the camera is either held bymeans of a hand-strap, or is rested on the edge… … FiG. 213.—Miethes camera for three-colour photography in a balloon. At the top is shown the front part with the three lenses, and below is seen the sliding screencarrier and the shutter. tudes, colour photography is only possible in a balloon when theweather is reasonably clear. The development of…
Aeronautics
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