"What matter?" cried J. T. Maston.

"Finally, it imparts to projectiles a velocity four times
superior to that of gunpowder. I will even add, that if we mix
it with one-eighth of its own weight of nitrate of potassium,
its expansive force is again considerably augmented."

"Will that be necessary?" asked the major.

"I think not," replied Barbicane. "So, then, in place of
1,600,000 pounds of powder, we shall have but 400,000 pounds of
fulminating cotton; and since we can, without danger, compress
500 pounds of cotton into twenty-seven cubic feet, the whole
quantity will not occupy a height of more than 180 feet within
the bore of the Columbiad. In this way the shot will have more
than 700 feet of bore to traverse under a force of 6,000,000,000
litres of gas before taking its flight toward the moon."

At this juncture J. T. Maston could not repress his emotion; he
flung himself into the arms of his friend with the violence of
a projectile, and Barbicane would have been stove in if he had
not been boom-proof.

This incident terminated the third meeting of the committee.

Barbicane and his bold colleagues, to whom nothing seemed
impossible, had succeeding in solving the complex problems of
projectile, cannon, and powder. Their plan was drawn up, and it
only remained to put it into execution.