could scoot along pretty lively. Look what speed a trolley car can make."
"Yes, Tom, but there again they get their power from an overhead wire."
"Some of them don't. There's a new storage battery been invented by a New Jersey man, which does as well as the third rail or the overhead wire. It was after reading about his battery that I thought of a plan for mine. It isn't anything like his; perhaps not as good in some ways, but, for what I want, it is better in some respects, I think. For one thing it can be recharged very quickly."
"Now Tom, look here," said Mr. Swift earnestly, laying aside his papers, and coming over to where his son sat. "You know I never interfere with your inventions. In fact, the more you think of the better I like it. The airship you helped build certainly did all that could be desired, and"
"That reminds me. Mr. Sharp and Mr. Damon are out in it now," interrupted Tom. "They ought to be back soon. Yes, dad, the airship Red Cloud certainly scooted along."
"And the submarine, too," continued the aged inventor. "Your ideas regarding that were of service to me, and helped in our task of recovering the treasure, but I'm afraid you're
