87 
of students contracted typhoid fever. Some who had never used beer 
resorted to clean beer; which is the ereater evil? 
The first duty of the prohibitionist should be to give the people clean 
water; it is useless to argue with people who are compelled to drink muddy 
water. The next step is to give people clean air. That takes away the 
craving for a sedative, be that tobacco or alcohol or opium. 
This paper properly should close with a questionnaire, asking for more 
data, especially from men who lead a mental life. Why do you use tobacco? 
Why do you not use it? Under what conditions do you demand it? When 
do you not care for it? Are you keeping down a high blood pressure by the 
excessive use of tobacco? Can you stop long enough, under bad air condi- 
tions, to find out what your real pressure is? 
It is difficult to get good data; observations should cover at least one 
year. Iam not inclined to draw conclusions from case reports which cover 
a period of less than a year, and as already mentioned, the longer the series 
of years, the more valuable data become. 
