no telling what they may do. They're desperate, and may ram us from in front."
Tom and the captain hurried aft. Through the thick plate-glass windows they could see the blunt nose of the Wonder not far away, the rival submarine having come to a halt. There she lay, black and silent, like some monster fish waiting to devour its victim.
"There doesn't appear to be much damage done back here," observed Tom. "No leaks. Guess they didn't puncture us."
"Perhaps it was due to an accident that they rammed us," suggested the captain.
"Well, they wouldn't have done it if they hadn't followed us so close," was the opinion of the young inventor. "They're taking too many chances. We've got to stop 'em."
"What is this electric gun your father speaks of?"
"Why, it's a regular electric cannon. It fires a solid ball, weighing about twenty-five pounds, but instead of powder, which would hardly do under water, and instead of compressed air, which is used in the torpedo tubes of the Government submarines, we use a current of electricity. It forces the cannon ball out with great energy."
"I wonder what they will do next?" observed the captain, peering through a bull's-eye.
