"It does. But--"
"Yes, and I don't see how you can tell, with any amount of
calculation, just how much force will develop from those
chemicals, as no one ever put them together before."
"Well, maybe I can't," admitted Jack. "But this tube is very
strong, and even if it does break nothing very serious can
happen."
"Unless the gas you expect to generate is stronger than you have
any idea of."
"Well, I'm going to do it. I've got half an hour before
Professor Lenton and his class comes in, and that's time enough.
Here, just hold this rubber tube under this jar, will you? And
be sure to keep the edge of the jar below the surface of the
water. I don't want any of the gas to escape."
He handed Mark the end of the rubber tube, and the somewhat
nervous student, who was helping his chum Jack in the experiment,
inserted it under the edge of a large bell-glass, the open mouth
of which was placed just under the surface of water in a shallow
pan.
The two lads were students at the Universal Electrical and
Chemical College. They stood high in their classes, and were
often allowed to conduct experiments on their own responsibility,
this being one of those occasions.
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