S6 4 THE POPULAR SCIENCE MONTHLY 



A large proportion of all cases of insanity are fonnd to be due to 

 causes within our own control. We have come across the trail again of 

 two formidable enemies, but they are old foes and we know their 

 strongholds; we have been gathering evidences of their depredations 

 in other directions and there are already movements on foot against 

 them. "We have gained the tremendous advantage of being able to 

 talk about both of them in public and before any hearers. Instead of 

 vague tales of the ravages of these enemies of the race, in one direction 

 or another, we have come to statistics, tabulations, investigations with 

 reference to specific effects and to the widest publicity. This is why it 

 is justifiable to speak of syphilis and alcohol as two preventable causes 

 of insanity. 



