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 Coöperative League of America, went
over the Chapter on Profit Sharing and Coöperation 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