RELATIONS TO OTHER SCIENCES 67 



determined. And yet in ignorant hands statistics may be worse 

 than useless. It is a matter for congratulation to Americans that 

 we now have in Washington a census bureau permanently estab- 

 lished and under expert supervision, but until the various states 

 and cities of the United States follow this excellent example of their 

 Federal Government, one of the most important aids to public 

 health science will continue to be wanting, as is unfortunately too 

 often the case to-day not only in America, but in many other parts 

 of the civilized world. 



