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.
"The atmospheric motor is all right," he declared, "and it works
to perfection," which was indeed true, for in tests they made
they found that the motor, the force of which was only less
powerful and complicated than the secret power that was to hurl them
through space, would easily send the projectile through the
comparatively thin atmosphere of the earth. They did not
actually move the Annihilator, since to do so would mean they
would have to take it out of the shed. But they made tests and
experiments with heavy objects, applying the force to them, and,
by calculation, Mr. Roumann and the professor found that the
force would actually send the projectile on the start of its
journey.
"But there is one point about my Etherium motor that still
bothers me," said the German.
"Can I help you solve it?" asked Mr. Henderson.
"No, thank you. I think I am on the right track. I will have it
perfected in a few days, and then we will be off for Mars.
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