what will it do to an elephant?" asked Mr. Durban one morning, when they were within a day's steaming of tkeir port. "I'm afraid it's almost too strong, Tom. It will leave nothing—not even the tusks to pick up."
"Oh, I can regulate the power," declared the lad. "I used full force on the whale, just to see what it would do. It was the first time I'd tried it on anything alive. I can so regulate the charge that it will kill even an elephant, and leave scarcely a mark on the beast."
"I'd like to see it done," remarked the old hunter.
"I'll show you, if we sight any sharks," promised Tom. He was able to keep his word for that afternoon a school of the ugly fish followed the steamer for the sake of the food scraps thrown overboard. Tom took his position in the stern, and gave an exhibition of shooting with his electric gun that satisfied even Mr. Durban, exacting as he was.
For the lad, by using his heaviest charges, destroyed the largest sharks so that they seemed to instantly disappear in the water, and from that he toned down the current until he could kill some of the monsters so easily and quickly that they seemed to float motionless on
