The professor reached out his hand to adjust some part of the mechanism. But a valve refused to open, the bulky monster gave a great lurch forward, and he perceived that it had become unmanageable! His benign countenance assumed an air of woe, but he hoped that all was not yet lost. He was deceived.

Suddenly the balloon careened over, and sailed through the air in a horizontal position, very unpleasant to the balloonists. Striking a certain parallel of latitude, it circled round this world of ours like a beam of light. In vain the professor attempted to get control of the unwieldy monster. Dropping their barometers and thermometers, the unhappy æronauts clutched the sides of the car with an agonized grip. Nothing was now said about the “sublimity” of things below; for no one durst cast his eyes to the ground.

Soon they were circumnavigating the world in the twinkling of an eye; and the balloon increased in speed till it exceeded the wildest calculations made by man respecting motion. The wretched travelers of the sky could no longer maintain their hold, and were one by one flung from the fated balloon like missiles from a catapult. They went whirling through space with a rotary motion, like balls from a rifle; while, from a peculiarity in the way in which they were flung, they took a different course from that taken by the balloon, more downward and southward.

Thus the pedagogue’s question, whether anything can be discharged from a motive power in motion, is set at rest forever.

In spite of the awfulness of his situation, Will could not help pitying whatever obstacle they should bring up against, for there would be a frightful collision.

For the thirtieth time the Rocky Mountains rose before them, and a large man, built on the approved Dicken’s model, was shot from the balloon. To the spectator’s horror, he went right through one of the loftiest mountains, just below the limit of perpetual snow, tearing a hole eight feet in circumference through the solid rock. When the “hardy mountaineer” comes upon that hole, he will call it a “freak of nature,” and be at a loss to account for its usefulness. “Ah! he didn’t ought to come!” the professor managed to articulate. But he was not heard, for in an instant an ocean of ether rolled between him and his words.

One by one the unfortunates were hurled from the balloon, till out of thirteen only the professor and the two cousins remained. The monster circumnavigated the globe one hundred times; then quivered, hesitated, slackened its speed, and finally, taking a new start, it left the earth entirely behind, and swiftly drew near one of the planets. It redoubled its exertions, and soon exceeded its former velocity. The air became warmer and warmer, nearer and nearer they came to the planet. The professor determined to make one more effort to check their wild flight, and took his right hand from the support it clutched, to pull a rope leading to a valve.

That movement was fatal: the professor himself was shot out of the balloon. He, however, took an upward course. The balloon seemed to know that he was gone; and quivering with joy and relief, it once more assumed a perpendicular position. The boys relaxed their hold, and gladly stretched their stiffened limbs. But its velocity seemed only to increase.

Six seconds later, the boys felt an awful crash above them. The balloon had overtaken its latest projectile, the professor, and a great collision was the result. Then the gas coming from the professor’s throat, and the gas inside of the balloon, met; and an explosion that jarred the planet they were drawing near,—though it was still three thousand miles away,—took place.

The balloon immediately collapsed, and then a strange thing happened. Will dilated till he reached the dimensions of the last exhumed New Jersey fossil, and then a cry of pain broke from his lips. He opened his eyes.