Henderson. "I suppose our
planet will be like that some time."
"I hope not by the time we get back to it," commented Jack. "I
wonder if we will ever get back to earth again?"
It was the first time he had expressed any doubt on this score.
"There's the last of the dead planet!" Mark cried.
They looked to see the black mass vanish into space.
"Yes, and we have reached the end of the atmosphere!" suddenly
cried Mr. Roumann as he glanced at a dial. "Now we will begin to
travel through ether."
He adjusted some levers, turned two wheels, threw over electric
switches, and there came a perceptible jar to the projectile.
"What was that?" asked Jack.
"I have disconnected the atmospheric motor," explained the German,
"and the Etherium one is now working. We are shooting along
through ether at the rate of one hundred miles a second."
CHAPTER XVII
A BREAKDOWN
After the first trembling, due to the increase of speed, the
sensation of traveling at one hundred miles a second was no
different from that when they had been speeding through the
atmosphere at fifty miles a second.
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