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 311
position. The film therefore recordsthe reading of the barometer as well as the view of the landscape.Cailletet had a method of checking the readings of the barometerby comparing the known distances between two places, asmeasured on the ordnance map, with their apparent distanceas measured on the… … for taking panoramic views for naval purposes, , which wasbrought into use at Lagoubran. The exposures were made BALLOON PHOTOGKAPHY. 291 electrically, and the results were successful in showing thedetails of all the forts over a radius of 4 miles. However, it isdoubtful whether the result of…
Aeronautics
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