government had offered a prize for a successful airship, but he thought an old shoemaker was hardly a possible person to win it.
"Scientific men have devoted many years of study to the problem," he said, "and they have not solved it yet. Still, of course, there's a chance. As you say, you're out nothing if it doesn't work the first time. But how about after you have put the five hundred dollars in, and the ship doesn't sail?"
"If it sails with the old engine it surely ought to with the new," declared Dick, repeating his favorite argument.
Mr. Hamilton consented that Dick might make the investment. It was a queer one, he said, but he agreed that if Herr Doodlebrod won the prize, and gave Dick half, the terms of Mrs. Hamilton's will would have been complied with.
"I'll get out of going to Uncle Ezra's yet," said the millionaire's son. "The mine failed, the milk company failed, but the airship will beat them all."
Herr Doodlebrod was a quick worker. In less time than Dick had believed possible he had the parts of the machine at the place decided on for the test. There, under the inventor's directions, men aided him in putting it together.
In shape it looked like a huge bat, and was built on the principle of an aeroplane. At the stern an immense rudder was turned by a small gasolene motor, and there were several smaller
