HOW THE HOUSE IS HEATED
OTHER If you touch a stone, Amy, how does it feel?
Amy: It is cold.
Mother: Yes, wood, iron, glass, and all the things around us which do not have life, are cold. If you touch your head, how does it feel?
Percy: It is warm.
Mother: We sometimes see a little glass tube called a thermometer, with figures telling us how warm or how cold the air is. Here is a smaller one that you may hold in your mouth under your tongue, Elmer, and we will see if it will tell us how warm the house you live in is inside. That will do. The glass says it is about ninety-eight degrees. How many degrees will the larger glass record on a hot summer day?
Elmer: It is very warm when it is over eighty or ninety in the shade.
Mother: Yet you see that inside the body-house it is nearly one hundred degrees, yet you do not feel too warm. Are all animals warm?