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 178
tain number of men,principally from the educated classes, are instructed practicallyand theoretically in the art. They receive the title of Aero-naute brevete after passing an examination, and are instructedto place themselves at the disposal of the authorities of a givenfortress in the event of… … country in case of need, and they receive lessons in the art ofconstruction for this purpose. The French army therefore dis-poses of the services of a large number of experienced men,who could, in case ofneed, do much usefulwork in the fortressesand elsewhere. Ithas both a civil andmilitary…
Aeronautics
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