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 355
he lines. The smalldeclivity at the side of the line is shown by the dark patches, 330 AIRSHIPS PAST AND PRESENT. where the snow has been unable to lodge. In the photographstaken by Spelterini, the snow, rocks, and glaciers are alwaysclearly to be seen. It will therefore be seen that a little… … Fig. 209/—Objects of different colours, photographed from above. Miethes system of colour photography is a further useful guide,which can hardly leave room for any doubt. It has been already stated that the use of yellow filters orisochromatic plates helps the photographic representation ofcolour…
Aeronautics
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