“The seat seems to be gittin’ too hot for comfort,” said the miner.

From beneath the auto there came a muffled explosion, followed by a big cloud of smoke. Then flames shot out, and the whole under side of the car was enveloped.

“We’re on fire!” yelled Bob, preparing to jump.

“Sit still!” exclaimed Jerry. “Don’t let go the wheel whatever you do!”

“Turn off the gasolene!” cried Ned. “The tank is leaking and the gasolene is burning!”

There was great excitement. The only person who kept his head was Professor Snodgrass. He did not seem to know the auto was on fire, but was calmly examining a small bug crawling on the cushion near him.

“What shall we do?” wailed Bob. “The auto will be destroyed!”

“We’re in a bad fix!” muttered the miner.

Bob reached over to shut off the power, and was making ready to jump.

“Sit still!” exclaimed Jerry.