Chapter
1 VII | 1453, stone shot of 1,900 pounds weight were employed. At
2 VII | projectile weighing 2,500 pounds. And, now, what is the extent
3 VII | discharging shot of 500 pounds, and the Rodman guns projectiles
4 VII | weigh more than 200,000 pounds, a weight evidently far
5 VII | give it a weight of 20,000 pounds.”~“What, then, will be the
6 VII | weight more than 20,000 pounds? Our clever secretary will
7 VII | weigh, in cast-iron, 67,440 pounds; cast in aluminum, its weight
8 VII | will be reduced to 19,250 pounds.”~“Capital!” cried the major; “
9 VIII | of a shot weighing 20,000 pounds being launched into space;
10 VIII | diameter, weighing 20,000 pounds. Now when a projectile is
11 VIII | diameter, weighing 30,000 pounds, the gun would only have
12 VIII | and a weight of 7,200,000 pounds.”~“Ridiculous!” rejoined
13 IX | gunpowder weighs about two pounds; during combustion it produces
14 IX | for its discharge sixteen pounds of powder.”~“You are certain
15 IX | employs only seventy-five pounds of powder for a projectile
16 IX | projectile of eight hundred pounds, and the Rodman Columbiad
17 IX | only one hundred and sixty pounds of powder to send its half
18 IX | pounder shot requires sixteen pounds of powder;— in other words,
19 IX | hundred and thirty-three pounds of powder, the quantity
20 IX | than one hundred and sixty pounds.”~“What are you aiming at?”
21 IX | another.~“Two hundred thousand pounds.” at last said Morgan.~“
22 IX | propose to double his 800,000 pounds of powder.”~“Sixteen hundred
23 IX | Sixteen hundred thousand pounds?” shouted Maston, leaping
24 IX | long; for you see 1,600,000 pounds will occupy a space of about
25 IX | of powder. Now, 1,600,000 pounds of powder will create 6,
26 IX | then, in place of 1,600,000 pounds of powder, we shall have
27 IX | we shall have but 400,000 pounds of fulminating cotton; and
28 IX | without danger, compress 500 pounds of cotton into twenty-seven
29 X | resist a projectile of 30,000 pounds weight? Overwhelmed at first
30 X | the ignition of 1,600,000 pounds of powder; and supposing
31 XV | to deal with 136,000,000 pounds of iron, a quantity far
32 XV | contained nearly 140,000 pounds weight of metal. They were
33 XV | been charged with 114,000 pounds weight of metal in bars
34 XV | dull tremblings. As many pounds of metal as there were to
35 XV | there were to cast, so many pounds of coal were there to burn.
36 XXII | mortar was charged with 160 pounds of powder, and the shell
37 XXIII | liberated. Now twenty-eight pounds of chlorate of potassium
38 XXIII | potassium produces seven pounds of oxygen, or 2,400 litres—
39 XXIV | object-glass weighing nearly 30,000 pounds, above the line of perpetual
40 XXV | introduction into it of 400,000 pounds of gun-cotton. Nicholl had
41 XXVII | the combustion of 200,000 pounds of pyroxyle!~On the morrow
42 XXVIII| and should weigh 19,250 pounds. Second, that the gun should
43 XXVIII| charge should contain 400,000 pounds of gun-cotton, which, giving
44 I | projectile are rammed 400,000 pounds of gun-cotton, which is
45 I | which is equal to 1,600,000 pounds of ordinary powder! And
46 V | the power of the 400,000 pounds of gun-cotton, must have
47 VIII | Evidently, as two hundred pounds will only weigh thirty pounds
48 VIII | pounds will only weigh thirty pounds on the surface of the moon.”~“
49 VIII | an object weighing 70,000 pounds on the earth would weigh
50 VIII | earth would weigh but 1,920 pounds on the surface of the sun.
51 VIII | let me see— about 5,000 pounds, a weight which you would
52 XXII | projectile only weighed 19,250 pounds, a weight very inferior
53 XXII | projectile only weighs 19,250 pounds!”~“Well?”~“And that it displaces
54 XXII | or in other words 56,000 pounds, and that consequently it
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