It is rubbed on the sand-paper, and that produces heat, and the
heat sets the match on fire. But I always thought that fire makes heat,
and not that heat makes fire.
_Mother._ Heat does not always make fire, Caroline; for, if it did,
everything would be on fire.
_Daughter._ Everything on fire, mother! why, what do you mean?
_Mother._ I mean, my dear, that everything contains heat.
_Daughter._ Everything contains heat, mother, did you say? Why, then, is
not everything warm? Some things, mother, are very cold; as ice, and
snow, and that marble slab.
_Mother._ Yes, my child, everything contains heat, as I shall presently
show you. When Alice goes to make a fire in a cold day, she does not
carry the heat with her, and put it into the fire, nor into the wood,
nor the coal, does she?
_Daughter._ Why, no, to be sure not, mother.
_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.
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