pearance of the fire balloon, 'It is but a child, but it will
grow!' It was but a child, and it has grown."

"No, Mr. President, it has not grown! It has got fatter--and this is
not the same thing!"

This was a direct attack on the Weldon Institute, which had decreed,
helped, and paid for the making of a monster balloon. And so
propositions of the following kind began to fly about the room: "Turn
him out!" "Throw him off the platform!" "Prove that he is heavier
than the air!"

But these were only words, not means to an end.

Robur remained impassible, and continued: "There is no progress for
your aerostats, my citizen balloonists; progress is for flying
machines. The bird flies, and he is not a balloon, he is a piece of
mechanism!"

"Yes, he flies!" exclaimed the fiery Bat T. Fynn; "but he flies
against all the laws of mechanics."

"Indeed!" said Robur, shrugging his shoulders, and resuming, "Since
we have begun the study of the flight of large and small birds one
simple idea has prevailed--to imitate nature, which never makes
mistakes. Between the albatross, which gives hardly ten beats of the
wing per minute, between the pelican, which gives seventy--"

"Seventy-one," said the voice of a scoffer.

"And the bee, which gives one hundred and ninety-two per second--"

"One hundred and ninety-three!" said the facetious individual.

"And, the common house fly, which gives three hundred and thirty--"

"And a half!"

"And the mosquito, which gives millions--"

"No, milliards!"

But Robur, the interrupted, interrupted not his demonstration.
"Between these different rates--" he continued.

"There is a difference," said a voice.

"There is a possibility of finding a practical solution. When De Lucy
showed that the stag beetle, an insect weighing only two grammes,
could lift a weight of four hundred grammes, or two hundred times its
own weight, the problem of aviation was solved. Besides, it has been
shown that the wing surface decreases in proportion to the increase
of the size and weight of the animal. Hence we can look forward to
such contrivances--"

"Which would never fly!" said secretary Phil Evans.

"Which have flown, and which will fly," said Robur, without being in
the least disconcerted, "and which we can call streophores,
helicopters, orthopters--or, in imitation of the word 'nef,' which
comes from 'navis,' call them from 'avis,' 'efs,'--by means of which
man will become the master of space. The