In the files of the Naturalization Bureau at Washington is a vast mass of original data which would be of priceless value in the study of the way in which those who would be “Americans by Choice” make their initial efforts in that direction; showing under oath their individual age, birthplace and race, date of arrival in this country, date of declaration of intention to become a citizen, marital and occupational status, details of the disposal of the petition for citizenship, and other facts constituting information ample for intelligent interpretation of aspects and relationships now little understood, not understood at all, or, more commonly, altogether misunderstood. These data are contained in the copies of the declarations of intention, petitions for naturalization and certificates of naturalization, issued since the institution of the Naturalization Service under the Act of 1906. The magnitude of this statistical treasure may be judged from Table VII. Each one of these nearly three million declarations of intention, and more than a million petitions--not to speak of the final certificates of citizenship--contains what amounts almost to a cross-section of the life history of an immigrant. Upon each petition is indorsed the record of the court’s action, acceptance or denial, and the reasons for denial are, if possible, more important than the fact of acceptance for the purposes of study of the immigration question in its political aspect. Owing in part to the chronic insufficiency of the staff in the Naturalization Bureau--not only preventing any proper statistical record or analysis of this material, but of late years compelling a lamentable curtailment and even the abandonment of such indexing as is obviously indispensable to the most routine official supervision and understanding;--in part to the absorption of the Bureau in its elaborate educational propaganda, and in part to a lack of appreciation of the value of this material by the officials there in charge, the leaders in Congress and the public in general, it has remained in an undigested and now probably indigestible mass in the files of the Bureau. For nearly fifteen years it has been accumulating. To collate and analyze it would be a prodigious job. Yet, as appears from the results of a very modest venture in this direction on the part of the Americanization Study, some of them presented in this volume,[98] it would be immensely worth while. And, what is more important, it probably would go far to modify, if not to revolutionize, many prevailing ideas and afford a new and sounder foundation and point of departure for theory and for guidance of practice as regards the assimilation of the immigrant into the American body politic. TABLE VII NUMBER OF DECLARATIONS OF INTENTION AND PETITIONS FOR NATURALIZATION FILED, AND CERTIFICATES OF NATURALIZATION ISSUED BY THE BUREAU OF NATURALIZATION, 1907-20{1}