"
"More powerful, eh? Then I wish you'd have some one else hold
this. I'm afraid the test tube will burst."
"What if it does? It can't hurt you--very much. But here, since
you're so nervous, I'll put a pile of books all around the tube
and the burner. Then, if it bursts, the books will prevent the
pieces of glass from flying all about. Does that satisfy you?"
and Jack began heaping some books about the burner, over which he
was about to suspend the test tube containing the queer chemical.
"Yes," returned Mark doubtfully. "I suppose it's all right--unless
the books will be blown all over."
"Well, I'll be jig-sawed!" exclaimed Jack with a laugh. "There's
no satisfying you. You're too particular, Mark."
"Maybe; but I don't want to get hurt."
"You'll not be injured in the least. Look, you're quite a
distance away, and even if it does explode and the books are
scattered away, it can't hurt much to be hit by one of these
volumes. There, I'm all ready now. Hold the tube firmly."
He placed the test tube in a support, clamping it fast, so that
it would be held steady over the flame.
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