“This matter,” said the president, “is obtained in perfect purity in different things, especially in cotton, which is nothing but the skin of the seeds of the cotton plant.  Now cotton, combined with cold nitric acid, is transformed into a substance eminently insoluble, eminently combustible, eminently explosive.  Some years ago, in 1832, a French chemist, Braconnot, discovered this substance, which he called xyloidine.  In 1838, another Frenchman, Pelouze, studied its different properties; and lastly, in 1846, Schonbein, professor of chemistry at Basle, proposed it as gunpowder.  This powder is nitric cotton.”

“Or pyroxyle,” answered Elphinstone.

“Or fulminating cotton,” replied Morgan.

“Is there not an American name to put at the bottom of this discovery?” exclaimed J.T.  Maston, animated by a lively sentiment of patriotism.

“Not one, unfortunately,” replied the major.

“Nevertheless, to satisfy Maston,” resumed the president, “I may tell him that one of our fellow-citizens may be annexed to the study of the celluosity, for collodion, which is one of the principal agents in photography, is simply pyroxyle dissolved in ether to which alcohol has been added, and it was discovered by Maynard, then a medical student.”

“Hurrah for Maynard and fulminating cotton!” cried the noisy secretary 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 deg. instead of at 240 deg. 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 we can, without danger, compress 500 lbs. of cotton into 27 cubic feet, that quantity will not take up more than 180 feet in the chamber of the Columbiad.  By these means the projectile will have more than 700 feet of chamber to traverse under a force of 6,000,000,000 of litres of gas before taking its flight over the Queen of Night.”