In my experience with and study of narcotic drug addiction and the narcotic drug addict, an experience touching practically every phase of the narcotic situation and giving me opportunity to observe the condition in practically every type of individual, the one constant and more and more strikingly emphasized observation has been constant physical symptomatology and the manifestations of pain and suffering and of fear. I have in my possession histories of addicts taken from all walks of life and from all classes and conditions of men. Some of my histories are of patients who were primarily defective, degenerate, weak or vicious. Some of my histories are of people of high mentality; of high ethical and moral standards; of high economic efficiency and social standing. These histories, stripped of names and possibilities of personal recognition, would form a very instructive collection of material for the man, physician, psychologist, sociologist, legislator or administrator who wishes to study the addict as he really is and to get some conception of the diversity of the problems which he presents. Neglect of this study and absence of this conception is the chief cause of past failure. We have tended to regard and handle and treat and legislate concerning narcotic addicts simply as narcotic addicts, instead of appreciating that different individuals and different types and classes of people who may suffer from addiction-disease present entirely different problems, and require entirely different handling.