can't get started with this motor! I don't see what ails it."
"Can't we steer to one side, as it is?"
"No. We're right in a powerful current of air, and steering won't do any good, until we have some motion of our own. Turn the gasolene lever on a little more, and see if you can get a spark."
Tom did so, but no explosion resulted. The twenty cylinders of the big engine remained mute. The airship, meanwhile, was gathering speed, sucked onward and downward as it was by the draught from the fire. The roaring was plainer now, and the crackling of the flames could be heard plainly. The heat, too, grew more intense.
Frantically Tom and Mr. Sharp labored over the motor. With the perverseness usual to gas engines, it had refused to work at a critical moment.
"What shall I do?" cried Mr. Damon from his position in the pilot house. "We seem to be heading right for the midst of it?"
"Slant the elevation rudder," called Tom. "Send the ship up. It will be cooler the higher we go. Maybe we can float over it!"
"You'd better go out there," advised Mr. Sharp. "I'll keep at this motor. Go up as high as you
