THE USE AND ABUSE OF DRUGS 171 



machine, and easily put out of running condition. If it is 

 out of order a physician should be consulted, and one 

 should not try to " doctor " himself. Boys and girls 

 should not drink tea and coffee. Cocoa and milk are bet- 

 ter beverages, as they are food substances; while neither 

 tea nor coffee have any food value, and are dangerous for 

 young people because they are apt to make them form the 

 habit of drinking tea and coffee to excess. It goes with- 

 out saying that alcohol in any form should not be used. 

 Tobacco has been proved to have a bad effect upon grow- 

 ing boys. Dr. Seaver of the physical training department 

 of Yale College some years ago made a careful comparison 

 of the growth of smokers and non-smokers during their 

 four years in college. He found that students who did not 



Alcoholic drink, tea, coffee, and tobacco are especially harmful during the years of 



bodily growth. 



use tobacco gained ten per cent more in weight, twenty- 

 four per cent more in height, twenty-seven per cent more 

 in chest expansion, and seventy-seven per cent more in lung 

 capacity than did the smokers. The tobacco heart of 



