FANNING. 179 



A. As air is a very bad conductor, 

 the more air an egg contains, the less 

 heat will be drawn from the tongue when 

 it touches the shell. 



Q. Why do ladies FAN themselves in summer, 

 to make their FACES COOL ? 



A. The fan puts the air in motion, 

 and makes it pass more rapidly over 

 their face ; and (as the temperature of 

 the air is always lower than that of the 

 human face) each puff of air carries off 

 some portion of heat from the face. 



Q. Does FANNING the air make the AIR itself 

 COOLER ? 



A. No ; fanning makes the air 

 hotter and hotter. 



Q. Why does FANNING the air increase its 



HEAT? 



A. By causing the air continually to 

 absorb heat from the human body which 

 it passes over. 



Q. If fanning makes the AIR HOTTER, how 

 can it make a PERSON feel COOLER ? 



A. Fanning makes the air hotter, 

 but the face cooler; because it keeps 

 taking the heat out of the face, and giving 

 it to the air. 



