CHAPTER XVIII 



ADULTERATED AIR TOBACCO 



WE have learned how much pure bracing air has 

 to do with the enduring strength of the House that 

 Jack Has, and how the dust and smoke of cities often 

 hinder its best building work. How unwise it seems 

 for people knowingly to adulterate the air their bodies 

 are using ! And yet many do so through the practice 

 of smoking. Tobacco, the substance most generally 

 used by smokers, is called a narcotic because of its 

 peculiar effect on the nervous system. The fact that 

 severe sickness usually follows the first use of tobacco 

 is good evidence that it is naturally poisonous to the 

 human body. 



Undoubtedly many tobacco users have lived to a 

 good old age. That they might have been healthier 

 and longer lived without the tobacco is quite probable. 

 It is also a well-known fact that many of the most 

 useful old men of the world have been abstainers from 

 tobacco. Many smokers who have become alarmed 

 at getting out of breath quickly through any unusual 

 exertion, have found, on consulting a physician, that 

 they had a "Tobacco Heart." This name is applied 



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