the
density of the atmosphere which the moon's light traverses, shall I not
render that light more intense?"

"Evidently."

"In order to obtain that result I shall only have to establish my
telescope upon some high mountain. We can do that."

"I give in," answered the major; "you have such a way of simplifying
things! What enlargement do you hope to obtain thus?"

"One of 48,000 times, which will bring the moon within five miles only,
and objects will only need a diameter of nine feet."

"Perfect!" exclaimed J.T. Maston; "then our projectile will have a
diameter of nine feet?"

"Precisely."

"Allow me to inform you, however," returned Major Elphinstone, "that its
weight will still be--"

"Oh, major!" answered Barbicane, "before discussing its weight allow me
to tell you that our forefathers did marvels in that way. Far be it from
me to pretend that ballistics have not progressed, but it is well to
know that in the Middle Ages surprising results were obtained, I dare
affirm, even more surprising than ours."

"Justify your statement," exclaimed J.T. Maston.

"Nothing is easier," answered Barbicane; "I can give you some examples.
At the siege of Constantinople by Mahomet II., in 1453, they hurled
stone bullets that weighed 1,900 lbs.; at Malta, in the time of its
knights, a certain cannon of Fort Saint Elme hurled projectiles weighing
2,500 lbs. According to a French historian, under Louis XI. a mortar
hurled a bomb of 500 lbs. only; but that bomb, fired at the Bastille, a
place where mad men imprisoned wise ones, fell at Charenton, where wise
men imprison mad ones."

"Very well," said J.T. Maston.

"Since, what have we seen, after all? The Armstrong cannons hurl
projectiles of 500 lbs., and the Rodman Columbiads projectiles of half a
ton! It seems, then, that if projectiles have increased in range they
have lost in weight. Now, if we turn our efforts in that direction, we
must succeed with the progress of the science in doubling the weight of
the projectiles of Mahomet II. and the Knights of Malta."

"That is evident," answered the major; "but what metal do you intend to
employ for your own projectile?"

"Simply cast-iron," said General Morgan.

"Cast-iron!" exclaimed J.T. Maston disdainfully, "that's very common for
a bullet destined to go to the moon."

"Do not let us exaggerate, my honourable friend," answered Morgan;
"cast-iron will be sufficient."

"Then," replied Major Elphinstone, "as the wei