THE RESPIRATION 



161 



it is not good for us and that we should not try to 

 use it. 



4. What change does God cause to come over our in- 

 stinct to avoid harmful things if we disregard the warnings 

 as if they were from an unwise source ? 



5. What means have shrewd manufacturers provided so 

 that even children now learn to smoke so gradually as not 

 to awaken the instinctive repugnance to the poison in 

 tobacco ? What aids in learning to chew tobacco ? 



6. What injury results from chewing tobacco that does 

 not result from smoking ? What injury results from smok- 

 ing that does not result from chewing ( 284)? 



7. Where has the smoke been that a boy blows out of 

 his nose ? What does such a boy usually smoke ? 



8. Give several reasons why weak tobacco smoke in the 

 lungs does a far greater amount of injury than strong 

 tobacco smoke in the mouth. 



9. Why do cigarette smokers usually inhale, or draw 

 the smoke into the lungs, while cigar smokers do not ? 



10. Think of three boys (without writing their names) 

 whom you know that do not use tobacco, and of three that 

 smoke cigarettes habitually. Fill out the following table, 

 placing the boys in two classes, and showing how many 

 of the three tobacco users are fleshy, and how many 

 are thin, etc. ; how many of the three abstainers are 

 fleshy, how many of the three are thin, etc. 



