“I have a request to make.

“If you should succeed in reaching home alive tell my wife that I sent her my love in my dying breath.”

Frank took the scientist’s hand.

“Of course I would do that,” he said. “But there is no more chance for me to reach home safely than for you.”

“I understand,” said Von Bulow, sadly; “but it is a comfort to me.”

“Then I will promise,” said Frank.

Just at this moment came the climax.

Barney came running into the cabin with his face as pale as chalk.

“Misther Frank!” he cried, “the chemical generator has failed to worruk, an’ the air is all going, sor!”

At once active measures were taken to meet the end.