way, now that, by the currents of heated air. At times it would rise a considerable distance, only to be pulled down again, and, just before Tom began to toss overboard some boxes of food, it seemed that the end had come, for the craft went down so low that the upward leaping tongues of flame almost reached the lower frame.
"I'll help you," gasped Mr. Damon, and while he and Tom tossed from the cabin windows some of their stores, Mr. Sharp was frantically endeavoring to make the gas generate faster.
It was slow work, but with the lightening of the ship their situation improved. Slowly, so slowly that it seemed an age, the elevation pointer went higher and higher on the dial.
"Sixteen hundred feet!" sung out Tom, pausing for a look at the gauge. "That's the best yet!"
The heat was felt less, now, and every minute was improving their situation. Slowly the hand moved. The gas was being made in larger quantities now that the heat was less. Ten minutes more of agony, and their danger was over. They were still above the burning area, but sufficiently high so that only stray wisps of smoke enveloped them.
"Whew! But that was the worst ever!" cried Tom, as he sank exhausted on a bench, and wiped
