Mother. And the heat that comes from the fire, after it is made, does not come in at the windows, nor down the chimney, does it?
Daughter. Why, no, mother; it feels cold at the windows, and cold air comes down the chimney.
Mother. But, after the fire is made, we feel much heat coming from the fire, do we not?
Daughter. Why, yes, mother; that is what the fire is made for. We feel cold, and we want a fire to make us warm; and when the fire is made, it sends out heat, and makes us warm.
Mother. Well, now, where can the heat come from? You know what fire is made from, do you not?
Daughter. Certainly, mother; the fire is made of wood, or of coal.
Mother. But is the wood or the coal warm before the fire is made?
Daughter. No, mother, the wood and the coal come from the cold wood-house, or the cellar, and they are both very cold.
Mother. And yet, the wood and the coal become very hot when they are on fire.
Daughter. O yes, mother, so hot that we cannot touch them with our hands, and we have to take the shovel or the tongs to move them.