"Is it true, Monsieur Roger," said Miette, "that it is with this machine that you can make smoke fall?"
"Certainly."
"Well, then, won't you show that to us?"
[CHAPTER XV.]
DROPS OF RAIN AND HAMMER OF WATER.
"I am very willing to show you that," answered Monsieur Roger; "but I must have a candle."
Miette ran to the kitchen and succeeded in obtaining that article which was once so common, and which is now so rare, known as a candle. Monsieur Roger lit the candle and placed it under the glass globe of the air-pump. Then he asked Paul to make a vacuum. At the end of a few minutes the candle went out. Monsieur Roger then told Paul to stop.
"Why has the candle gone out?" asked Miette.