H——. "Because the cold air that was in the bubbles, would cool the water next them, and then"—(he was quite confused, and stopped.)
B—— (a girl of ten or eleven years old) spoke next. "I thought that chocolate was much thicker than water, and there were more parts, and those parts were closer together, and each could hold but a certain quantity of heat; and therefore chocolate could be made hotter than water."
Father. "That is a good chemical idea. You suppose that the chocolate and tea can be saturated with heat. But you have none of you yet told the reason."
The children were all silent.
Father. "Can water ever be made hotter than boiling hot?"
B——. "No."
Father. "Why?"
B——. "I don't know."
Father. "What happens to water when it does what we call boil?"