260 PHYSIOLOGY. 



fluence on the system, and the habit, once formed, is hard 

 to break. 



How many men have been heard to say, " I wish I had 

 never formed the habit." 



Has any one in middle or later life ever been heard to 

 say, " I wish I had formed this habit " ? 



READING. The Nature and Effects of Alcohol and Nar- 

 cotics, Luce ; Diseases of Inebriety ', Crothers ; Inebriety, its 

 Causes, its Results, its Remedy, Clum ; Inebriety, Palmer. 



Summary. i. The most important physiological effects of alcohol 

 are on the nervous system. 



2. Many physicians regard inebriety as a disease. 



3. The use of alcohol weakens the will power. 



4. Narcotics produce anesthesia, or loss of feeling. 



5. Hence narcotics are useful in deadening pain, but their use is 

 dangerous. 



6. Opium is one of the most widely used of the narcotics. 



7. Tobacco is needless and in many cases harmful. 



8. Cigarette smoking is very injurious, especially to the young. 



Questions. i . Why is cigarette smoking more injurious than 

 cigar smoking ? 



2. How does the opium habit often begin ? 



