Through Space to Mars | Page 3

"It's bubbling now!" suddenly called Mark.
"That's good! The experiment is a success! I knew I could make it. Is any of the gas
coming up in the glass jar?"
Mark bent over to make a closer examination. There were a few seconds of silence,
broken only by the roaring of the burner and the crackling of the black powder.
"Yes, there is vapor in the jar," he said.
"Good! That's the stuff!" cried Jack. "Now I guess Professor Lenton will admit that I'm
right."
He turned the Bunsen flame up higher. A moment later he uttered a cry, for he saw the
cork being forced from the test tube. The pressure of the new gas was too much for it.
"Lookout!" cried Jack. "She's going up!"
Then followed a sharp explosion, and the laboratory seemed filled with fragments of
broken glass and torn books.

CHAPTER II
JACK MAKES OXYGEN
"There it goes! There it goes!" cried Mark, making a dive for the laboratory door, but
slipping and sprawling on the floor. "There it goes, Jack!"
"No; it's gone already!" cried Jack, who, even in the midst of danger and excitement,
seemed to remain calm and still to have his appreciation of it joke.
"Come on!" cried Mark as he scrambled to his feet. "We must get out of here, Jack!"
"What's the use now? It's all over."
There was a tinkling sound, as fragments of the broken test tube, the bell-jar and other
things began falling about the room.
Mark was fumbling at the door of the laboratory, seeking to escape.
"Come on back," said Jack. "It's all over. There's no more danger. We'll try it again."
Just then one of the pile of books, that had been blown on an upper shelf, came down,
landing on Mark's head.
"No danger?" cried Mark, trembling from excitement. "No danger? What do you call
that?" and he pointed to the books at his feet, while he rubbed his head ruefully.
"Well, there aren't any more," observed Jack, with a look upward.
Just then the door opened, and an elderly gentleman, wearing spectacles, entered the
laboratory. He seemed much excited.
"What happened? Is any one hurt? Was there an explosion here?" he asked.
Then he saw the devastation on all sides--the broken glass, the scattered and torn
books--and he noticed Mark rubbing his head.
"There was--er--a slight explosion," replied Jack, a faint smile spreading over his face.
"Are you hurt?" the professor asked quickly, stepping over to Mark. "Shall I get a
doctor?"
"A book hit him," explained Jack.
"A book! Did a book explode?"
"No, sir. You see, I was making a new kind of gas, and Mark was helping me. He was
afraid the test tube would explode, so I piled books around it, and--"

"And it did blow up!" cried Mark, still rubbing his head. "The test tube, and the other
tube, and the rubber hose, and the bell-jar. I told you it would, Jack."
"Then you weren't disappointed," retorted Jack, this time with a broad smile. "I don't like
to disappoint people," he added.
"What kind of gas was it, Darrow?" asked Professor Lenton.
"Well, I hadn't exactly named it yet," answered the young inventor. "I was going to show
it to you, and see what you thought of it. It's the kind you said I couldn't make."
"And did you make it?" asked the instructor grimly.
"Yes, sir--some."
"Where is it?"
"It's--er--well, you can smell it," replied Jack.
Sure enough, there was a strong, unpleasant odor in the laboratory, but that was usual in
the college where all sorts of experiments were constantly going on.
"Hum--yes," admitted the professor. "I do perceive a new odor. But I'm glad neither of
you was hurt, and the damage doesn't seem to be great."
"No, sir. It was my own apparatus I was using," explained Jack. "I'll be more careful next
time. I'll not put in so much of the chemical."
"I don't believe there had better be a 'next time' right away," declared Mr. Lenton.
"The next attempt you make to invent a powerful gas, you had better generate it in
something stronger than a glass test tube. Use an iron retort."
"Yes, sir," replied Jack.
"And now you had better report for your geometry lesson," went on the professor. "I need
the laboratory now for a class in physics. Just tell the janitor to come here and sweep up
the broken glass. I am very glad neither of you boys was seriously injured. You must be
more careful next time."
"Oh, Mark was careful enough," said Jack. "It was all my fault. I didn't think the gas was
quite so powerful."
"All right," answered the professor with a smile as Jack and Mark passed out on their
way to another