the wind. An air ship, we must be enabled to raise or A man to work a pair of wings that would lower without being controlled by any medium, lift him from the surface of the earth, could not endure the exertion an hour, if he had to such as hydrogen or other gases; in fact, it » must be manipulated…
Aeronautics
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
