146 EFFECTS OF HEAT. 



if it be less dense, the air in our body 

 will blow us out. 



Q. Why do PERSONS who ASCEND in BAL- 

 LOONS FEEL PAIN in their eyes, ears and chest ? 



A. Because the air in the upper regions 

 is more rare than the air in their bodies ; 

 and (till the equilibrium is restored) great 

 pain is felt in all the more sensitive parts 

 of the body. 



Q. Why do PERSONS who DESCEND in DIVING- 

 BELLS FEEL PAIN in their eyes, ears and chest ? 



A. Because the air in the sea is 

 more dense than the air in their bodies ; 

 and (till the equilibrium is restored) great 

 pain is felt in all the more sensitive parts 

 of the body. 



Q. Why does the SEA HEAVE and SIGH just 



PREVIOUS to a STORM ? 



A. The density of the air (just 

 previous to a storm) is very suddenly 

 diminished, but the air in the sea is not 

 so quiMy affected', therefore the sea 

 heaves and sighs in its effort to restore 

 an equilibrium. 



Q. Why is the AIR so universally STILL just 



PREVIOUS to fl TEMPEST? 



