Chapter

 1 II  |        to aerostats “apparatuses heavier than the air,” flying machines,
 2 III |     machines, moving in a medium heavier than themselves, maneuvering
 3 IV  | atmospherical space by apparatus heavier than the air—for it must
 4 IV  |      than the air—for it must be heavier to be stronger than the
 5 IV  |   between ‘the lighter” and ‘the heavier” than air?~Robur did not
 6 IV  |     platform!” “Prove that he is heavier than the air!”~But these
 7 V   |          no less enthusiast for “heavier than air” had said things
 8 VII |           It was to contrivances heavier than air, to flying machines
 9 VII |         which the principles of “heavier than air” are laid down.
10 VII |          of Nadar, a society of “heavier than air” was founded in
11 VII |          all those partisans of “heavier than air,” English, American,
12 VIII|    aerial locomotion by machines heavier than air?”~It would have
13 XV  |         believe a little more in heavier than air?”~To these questions,
14 XXI |          the marvels of machines heavier than air, and raised a frightful
15 XXI |    application of the theory of “heavier than air.” And if the inventor
16 XXII|   against any apparatus that was heavier than air?~During the seven