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Updated: April 30, 2025
"The gauge shows that we're making twenty-five miles a second." "We will soon go much faster," announced Professor Roumann. "I have not yet had a chance to test my Cardite motor to its fullest speed, and I think I will do so. I wish to see if it will equal my Etherium machine. I'll turn on the power gradually now, and we'll see what happens."
But we will have a test to make certain. Send Professor Henderson here, Please." The other scientist came from the house, and the test was made. To the delight of all the Etherium motor worked perfectly. The slight adjustment of the piece of metal had been all that was needed. "Now we can get ready to leave in a week," repeated the German enthusiastically.
"If any other crazy men get inside, they'll have to answer to me." Work on the projectile was resumed, and for a week went on uninterruptedly. It was nearing completion, though there were many details yet to look after. Mr. Roumann was having more trouble with his Etherium motor than he anticipated.
It was an anxious assemblage that gathered inside the big shed the next day, to watch Professor Roumann try the Cardite motor. Would it work as well as had the Etherium one? Would it send them along through space at enormous speed?
He had not disclosed to his companions the secret of the force that was to make it move, nor had he told them how to work the Etherium and atmospheric motors. He would start the machinery in operation, and he had promised to show the professor and the boys how to control it, but the secret of the wonderful power he kept to himself. "I think we can let the two machinists go now," said Mr.
Henderson. "And we'll help him," added Mark. "There is little for us to do on the projectile now, and we can do guard duty, Jack and I together." It took Mr. Roumann several days to repair the damage done to the Etherium motor by the bomb. During that time Andy and the boys were constantly on guard about the shop, but the crazy machinist and his companion did not return.
Then we shall reach the true ether, and the Etherium motor will be put into operation." "Well," said Jack, "this trip isn't going to be very strong on scenery, anyhow." "No," agreed Mr. Roumann. "We shan't be able to observe anything but this fleeciness until we get to Mars." "We can see the stars and moon at night, can't we?" asked Mark.
Roumann and Professor Henderson," suggested Mark. They started toward the pilot house, but met the two scientists rushing back toward the engine-room. "Has anything happened?" asked Jack. "Yes," answered the German. "The Etherium motor has stopped working!" "And are we falling?" asked Mark. "Yes, in a sense," answered Mr. Henderson, as the other inventor hurried on.
"This is the most wonderful material in the world!" he exclaimed. "Yes, or in the whole universe. It is better than perpetual motion, for it is not only that, but perpetual light and heat. I believe I can use it in the Etherium. motor in place of the force I ordinarily employ." He made some experiments, and found that this could be done.
Standing with his back to them was a strange man. Over his head he was swinging a sledge hammer, which he brought down with great force upon the Etherium motor. "I'll smash it! I'll stop this machine! I'll send us all to the bottom of the universe!" the man was muttering. "Quit that!" cried Jack, springing forward. The man paused and turned. "The crazy machinist!" shouted Jack.
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