"We're falling!" cried Innis, from the pilot-house, as he noted the height gage, and saw that the hand was constantly receding. "We're falling, Dick!"

"I know it—no help for it," answered our hero, hopelessly.

The Abaris was certainly going down. When the propellers had ceased to urge her forward she began to dip toward the earth, even as a stone falls when the initial impulse from the sling, or the hand of the thrower, is lost.

Foot by foot she dropped, and those aboard her looked helplessly at one another. They had made a brave fight against the fire, but it seemed to have gone for naught. They could not keep up with the motor stalled as it was.

"I guess we'll have to make another landing," said Innis, as he remained at the wheel.

Of course they were entitled to one more, but it would be the last, and a long and hard part of their trans-continental flight was still ahead of them. If they went down this time, and, after making repairs, came up into the air once more, they would not, under the rules, be allowed to land again before reaching San Francisco.

"It's tough luck, but I guess we'll have to do it," said Larry Dexter.

"Maybe not!" Dick cried. "I have an idea."

"What is it? Tell us quick!" begged Innis, for he, as well as all of Dick's friends, wanted to see him win the prize.

"I think the insulation has been burning off some of the wires of the motor," was his answer. "That would make a short circuit and put it out of business. Now if we can only keep afloat long enough to change those wires, we may be able to start the motor again, and keep on our way before we touch ground."