THE GIRCULATION 181 



59. Action of Tobacco on the Heart. Tobacco both quickens 

 and enfeebles the heart. In some of those who habitually use 

 it, it gives rise to a throbbing or heaving sensation in the 

 region of the heart, an exaggerated kind of palpitation ; at 

 times, this is so tumultuous that the patient fears lest his last 

 hour has come. In other cases, there is a weak and irregular 

 heart-beat, caused by tobacco poisoning. This is not so alarm- 

 ing to the patient as the*. condition just mentioned, but is no 

 less dangerous and much less easily cured. It is apt to injure 

 a man's capacity for business affairs, being repressive of health- 

 ful energy and exertion. 



69. What two noticeable effects from tobaceo ? 



