Page:Popular Science Monthly Volume 76.djvu/568

564 A large proportion of all cases of insanity are found 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.