CHAPTER XIX
THE CAVES OF ICE
"Keep on firing! Hold 'em back a few minutes and I'll soon turn my electric rifle loose on 'em!" yelled Tom Swift as he sprinted forward. "Keep on shooting, Mr. Damon!"
"Bless my powder-horn! I will!" cried the excited man "I'll fire all the cartridges there are in the rifle!"
Which, at the rate he was discharging the weapon, would not take a long time. But it had the effect of momentarily checking the advance of the creatures.
Not for long, however. Our friends had barely reached the airship, with Mr. Parker stumbling and slipping on the ice and snow, ere the musk oxen came on again, with loud bellows.
"They're going to charge the ship! They'll ram her!" yelled Ned Newton.
"I think I can stop them!" cried Tom, who had leaped toward his stateroom. He came out
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