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 358
elyin front of the plate. The camera has no focussing screen,seeing that it is adjusted once for all. A shutter of the slit typeis used, and at the back there are the usual double-backs. Thewhole of the manipulation is done from the outside, and thedouble-backs are fitted with rolling blinds.… … Fig. 212. Sliding screen carrier for three-colour photography. Miethes ethyl red (chinoline, chinaline, ethyl nitrate) is dissolvedin 500 fluid ounces of alcohol, and forms a stock solution whichmust be kept in the dark. One fluid ounce of the stock solutionis taken and mixed with 100 ounces of…
Aeronautics
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