"So they do," said Johnny.
"Oh, no, they don't!" exclaimed Julia.
"Yes; although you do not notice it, because the water is in the form of a fine vapor which passes off through the air. But I could prove to you, if you were in my laboratory, that the flame of even a little taper produces water. I have performed that experiment a good many times."
"Yes, he has," said Sue; "I've seen him: the water settles on the glass, just as if you had breathed on it."
"And it can be done so that the drops will trickle down the sides of the receiver," said Johnny.
"But how about the slow combustion going on in this veranda, Johnny?" asked Sue.
"Slow combustion goes on in animals. They eat the plants in which the sun has stored up heat, or other animals whose bodies have been formed out of the stored heat in plants, and the carbon and hydrogen go into their blood, and are carried by the blood to the lungs, where they come in contact with the oxygen of the air, under a moderate heat, to make more heat, by uniting with the oxygen to form carbonic-acid gas, which is breathed out into the air to help furnish carbon for the plants."
"But there are no animals in this veranda, except a few flies," said Julia.
"Oh, yes!" said Sue. "There's you and I, and Johnny and Felix, and Ruth and Pierre!"
"I am not an animal!" exclaimed Julia indignantly. "Am I, Johnny?"