COOLING. 313 



A. Blowing causes the air (which 

 covers the hot food) to change more 

 rapidly ; in consequence of which, the 

 hot air is quickly blown away, and gives 

 place to fresh cold air. 



Q. Why do ladies FAN THEMSELVES in hot 

 weather ? 



A. By the action of the fan, fresh 

 particles of air are perpetually brought 

 in contact with the face, and every fresh 

 particle of air absorbs some heat from the 

 skin. 



Q. Does the fan COOL the AIR? 



A. No ', it makes the air hotter, by 

 imparting to it the heat out of our face : 

 but it cools the face blown upon, by 

 transferring its heat to the air. 



Q. Is the AIR in SUMMER time ever so hot as 

 our bodies ? 



A. No, not in England. In the 

 hottest day in summer, the air of England 

 is 15 or 20 degrees cooler than the 

 human body. 



Q. How fast does wind travel ? 



A. A gentle breeze goes at about 

 the rate of 5 miles an hour. A high 



E a 



