SNOW WARM. 333 



Q. WHY is SNOW a BAD CONDUCTOR of heat 

 and cold ? 



A. Because air is confined and 

 entangled between the crystals, and air 

 is a very bad conductor ; when, therefore, 

 the earth is covered with snow, it cannot 

 throw off its heat by radiation. 



Q. Tell me the words of the PSALMIST (cxlvii. 

 16.) respecting snow, and explain what he means. 



A. The Psalmist says "The Lord 

 giveth snow like wool:" and he means 

 not only that snow is as white as wool, 

 but that it is also as warm as wool. 



Q. Why^s WOOL WARM ? 



A. Because air is entangled between 

 the fibres of the wool, and air is a lad 

 conductor. 



Q. Why is SNOW WARM ? 



A. Because air is entangled between 

 the crystals of the snow, and air is a bad 

 conductor. 



Q. Why docs SNOW NOURISH the earth ? 



A. Because it supplies it mihmoisturc 

 for a considerable time ; which penetrates 

 slowly into the soil, and insinuates itself 

 through every clod, ridge, and furrow. 



