“What’s that thing?” the boy inquired, indicating the shining tank.
“What thing?” asked Fitz Mee.
“That shiny thing.”
“Why, that’s my air-tank and pump.”
“It looks just like the air machine papa has in his office,” Bob remarked. His father was a physician. “He uses his in treating people’s throats. What do you use yours for?”
“Don’t you know?” queried the goblin in surprise.
“No,” answered the boy.
“Well—well! It’s plain you never had anything to do with feather-bed ballooning. I use it in raising and lowering the balloon.”
“In raising and lowering the balloon?”
“Yes.”