in circles, and in figure eights, desiring to test the machine in various capacities.
Suddenly the engine stopped, and to those below, anxiously watching, the silence became almost oppressive, for Tom had somewhat descended, and the explosions had been plainly heard by those observing him. But now they ceased!
"His engine's stalled!" cried Garret Jackson.
Mr. Swift heard the words, and looked anxiously up at his son.
"Is he in any danger?" gasped Mr. Damon.
No one answered him. Like some great bird, disabled in mid flight, the monoplane swooped downward.
A moment later a hearty shout from Tom reassured them. "He shut off the engine on purpose," said Mr. Jackson. "He is vol-planing back to earth!"
Nearer and nearer came the Butterfly. It would shoot downward, and then, as Tom tilted the planes, would rise a bit, losing some of the great momentum. In a series of maneuvers like this, the young inventor reached the earth, not far from where his father and the others stood. Down came the Butterfly, the springs of the wheel frame taking the shock wonderfully well.
"She's all right—regular bird!" cried Tom, in enthusiasm, when the machine had come to a
