Mr. Henderson suddenly bent over one of the indicators. He
pressed a lever, turned a wheel, and then exclaimed:
"The Etherium motor has stopped working 'again! I wonder if the
maniac is loose!"
"We'll see!" cried Jack, as he and Mark hurried toward the
engine-room. They found Mr. Roumann there.
"The motor has stopped!" exclaimed Jack.
"I know it."
"Has there been an accident?"
"No."
"What's the matter, then?"
"We have completed our journey through the ether. The motor will
only work in that."
"And that means--" began Mark.
"That we have reached the atmosphere of Mars!" exclaimed Mr.
Roumann in triumph.
CHAPTER XXI
MARS AT LAST
Anticipating, as they had for some time past, such an
announcement, it was none the less startling to the boys.
"Then we are really nearing Mars?" exclaimed Jack.
"Not only nearing it, but we will be there within twenty-four
hours," answered the German scientist. "I was looking for this.
I expected the Etherium motor to stop as soon as it reached the
atmosphere of the planet, and it has done so.
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