NICOTINE AND ADOLESCENCE 



139 



But this inspiring flush-time is soon over. Fifteen minutes 

 have passed. Even yet the sphygmograph has not been taken 

 from the wrist. It is still making records. And now see what 

 has happened. All the splendid vigor has faded out. Once 



SPHYGMOGRAPH RECORDS OF THE HEARTBEAT OF Two 

 DIFFERENT PERSONS 



1,2, 3, tracings made by the heart of a young man of nineteen : i, before smoking ; 

 2, while smoking ; 3, after smoking. He began to smoke cigarettes at fifteen. 4, 5, 6, 

 tracings made by the heart of a young man of twenty : 4, before smoking; 5, while 

 smoking ; 6, after smoking. Began smoking at thirteen ; now uses a strong pipe. 

 (From Dr. McKeever) 



again that heart beats almost at dead level. Brain cells lose 

 their courage. Muscle and liver, stomach, lungs, and spleen 

 have to do the best they can with the slow-moving blood. It 

 brings short rations of food to cells that cry out for nourish- 

 ment. But, sad to say, the slow-pumping heart will stay in 



