"The earth is the Lord's, and the fulness thereof; the world, and they that dwell therein."—Psalm xxiv.
136. What does the hearth-stone do with the heat that it receives?
It delivers it to the surrounding air, and to any other bodies with which it may be in contact—and as it parts with heat, it takes up more from any body hotter than itself.
137. When there is no fire in a room, what is the relative temperature of the various things in the room?
They are all of the same temperature.
138. If all the articles in the room are of the same temperature, why do some feel colder than others?
Because they differ in their relative powers of conduction. Those that are the best conductors feel coldest, as they convey away the heat of the hand most rapidly.