50 nature's Miracles. 



during our waking hours. It is best, however, 

 to be in good air all of the time. By pure air 

 I do not mean pure oxygen, but the right mix- 

 ture of the two gases that make air. Too 

 much of a good thing is often worse than not 

 enough. Pure food to eat, pure water to 

 drink, and pure air to breathe would soon be 

 the financial ruin of a large class of doctors. 



