Gifford Pinchot, President of the National Conservation Association, kindly read and criticized the Chapter on Conservation.
Edward R. Johnstone, Superintendent of the Training School at Vineland, N. J., kindly read and criticized several of the chapters on social problems.
Edward T. Devine of New York City offered valuable suggestions with regard to the Chapter on Dependency.
Owen R. Lovejoy, Secretary of the National Child Labor Committee, strengthened the Chapter on Health in Industry.
The Chapter on Crime and Correction was notably improved by the suggestions of Reginald Heber Smith, member of the Massachusetts Bar, and author of the admirable Justice and the Poor.
J. P. Warbasse, President of the Co÷perative League of America, went over the Chapter on Profit Sharing and Co÷peration painstakingly.
The Chapter on the Negro was criticized helpfully by Dr. W. E. B.
DuBois, Editor of the Crisis.
W. M. Steuart, Director of the United States Census, kindly supplied advance figures on the 1920 Census.
The author is also indebted to Houghton Mifflin Company, Ginn and Company, and the Macmillan Company, either for advance information on certain of their new books, or for permission slightly to adapt some of the material appearing in books copyrighted by them.
Lastly, the author is grateful to his wife for valuable assistance in correcting the proof.