CARPETS. STONES. 1 69 



A. Merely because the iron is a 

 better conductor; and, therefore, draws 

 of the heat from our hand much more 

 rapidly than wood does. 



Q. Why does a STONE or marble HEARTH feel 

 to the feet so much COLDER than a CARPET or 

 hearth-rug ? 



A. Because stone and marble are 

 good conductors, but woollen carpets and 

 hearth-rugs are very bad conductors. 



Q. Why does the STONE HEARTH make our 



FEET COLD? 



A. As soon as the hearth-stone has 

 absorbed a portion of heat from our foot, 

 it instantly disposes of it, and calls for 

 a fresh supply ; till the hearth-stone has 

 become of the same temperature as the 

 foot placed upon it. 



Q. Do not the woollen CARPET and HEARTH- 

 RUG, also, conduct heat from the human body ? 



A, Yes ; (but being very bad con- 

 ductors) they convey the heat away so 

 slowly, that it is scarcely perceptible. 



Q. Is the COLD HEARTH-STONE and WARM 

 CARPET then of the SAME TEMPERATURE ? 



A. Yes; everything in the room is 



Q 



