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 325
o bend down over his camera in a very awkward position, andprobably ends by making his exposure at random without know-ing exactly in what direction the lens is pointing at the moment.If it is actually necessary that the^ plate should be horizontal atthe moment of exposure, the best plan is to… … Fig. 188.—Ducoms photographicapparatus. (From Pizzighellvs Handbook forPhotography, 1891.) Fig. 189.—Hagens method ofmounting the camera. constantly shifting load. This plan has therefore beenabandoned. Various arrangements have been suggested by which thecamera is mounted on the outside of the…
Aeronautics
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