particular person. I wish, however, to acknowledge my indebtedness
to all who have patiently labored in this field, and especially to
those Masters of Child Study, G. Stanley Hall, John Dewey, Earl
Barnes, Edwin A. Kirkpatrick and Edward L. Thorndike. I owe much to
my opportunity to work in the Federation for Child Study. These
groups of mothers and teachers have done a great deal, under the
guidance and inspiration of Professor Felix Adler, to develop a
spirit of co-operation in the attack upon the practical problems of
child-training in the home.

I am very grateful to Mrs. Hilda M. Schwartz, of Minneapolis, for
her assistance in revising the manuscript and in securing the
illustrations.

The assistance of my husband has been invaluable. In his suggestions
and criticisms he has given me the benefit of his experience as
biologist and educator.

SIDONIE MATZNER GRUENBERG.

New York May, 1913.




A FOREWORD


In the thought of the writer of this prefatory page, the book he
thus introduces is an exceptionally sane, practical and valuable