_All rights reserved_ Published, September, 1916 LC 16-20410 _Reprinted with the permission of the author_ KRAUS REPRINT CO. A U.S. Division of Kraus-Thomson Organization Limited Printed in U.S.A. EDITORIAL ANNOUNCEMENT This volume is one of a series of Monograph Supplements to the Journal of Criminal Law and Criminology. The publication of the Monographs is authorized by the American Institute of Criminal Law and Criminology. Such a series has become necessary in America by reason of the rapid development of criminological research in this country since the organization of the Institute. Criminology draws upon many independent branches of science, such as Psychology, Anthropology, Neurology, Medicine, Education, Sociology, and Law. These sciences contribute to our understanding of the nature of the delinquent and to our knowledge of those conditions in home, occupation, school, prison, etc., which are best adapted to elicit the behavior that the race has learned to approve and cherish. This series of Monographs, therefore, will include researches in each of these departments of knowledge insofar as they meet our special interest. It is confidently anticipated that the series will stimulate the study of the problems of delinquency, the State control of which commands as great expenditure of human toil and treasure as does the control of constructive public education. ROBERT H. GAULT, } _Editor of the Journal of Criminal } Law and Criminology. } Northwestern University._ } } FREDERIC B. CROSSLEY, } COMMITTEE ON PUBLICATION _Northwestern University._ } OF THE } AMERICAN INSTITUTE JAMES W. GARNER, } OF CRIMINAL _University of Illinois._ } LAW AND CRIMINOLOGY. } HORACE SECRIST, } _Northwestern University._ } } HERMAN C. STEVENS, } _University of Chicago._ } PREFACE