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The Moon-Voyage by Jules Verne
page 74 of 450 (16%)
of the Gun Club.

"I return to pyroxyle," resumed Barbicane. "You are acquainted with its
properties which make it so precious to us. It is prepared with the
greatest facility; cotton plunged in smoking nitric acid for fifteen
minutes, then washed in water, then dried, and that is all."

"Nothing is more simple, certainty," said Morgan.

"What is more, pyroxyle is not damaged by moisture, a precious quality
in our eyes, as it will take several days to load the cannon. Its
inflammability takes place at 170° instead of at 240° and its
deflagration is so immediate that it may be fired on ordinary gunpowder
before the latter has time to catch fire too."

"Perfect," answered the major.

"Only it will cost more."

"What does that matter?" said J.T. Maston.

"Lastly, it communicates to projectiles a speed four times greater than
that of gunpowder. I may even add that if 8/10ths of its weight of
nitrate of potash is added its expansive force is still greatly
augmented."

"Will that be necessary?" asked the major.

"I do not think so," answered Barbicane. "Thus instead of 1,600,000 lbs.
of powder, we shall only have 400,000 lbs. of fulminating cotton, and as
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