“I will,” said cheery Uncle George. “Just wait until I get some things from the kitchen. Come along, boys.”

When Uncle George and the boys came back to the room, they brought a lot of curious articles with them. These were an empty pickle-bottle, a small saucer, a glass bell-jar, a large dish, a piece of candle, some tacks, and a taper.

A Baby Cloud

THE BALLOON

“Now,” said Uncle George, “we are ready to begin.”

He first lighted the piece of candle and lowered it into the bottle. It burned for a short time, then it went out.

“Can you tell me why it goes out?” he asked.

“Want of air,” said Tom and Frank at the same time.