Sherif and a contribution from the Marshall Field Foundation to
Princeton University, enabling Cantril to be relieved of some teach-
ing duties and allowing us bibliographical and secretarial assist-
ance, combined to make it possible for us to work closely together.
We acknowledge this assistance most gratefully.

Carolyn Wood Sherif has worked with us since late 1945. She
has greatly aided us in selecting some of the material and in pre-
paring certain chapters.

We gratefully acknowledge the help of Drs. Harold and Mary
Cover Jones of the Institute of Child Welfare of the University of
California for allowing us to go over some of their unpublished
material on adolescence.

We are indebted to Donald Stauffer and Whitney J. Oates of the
Princeton faculty for their apt suggestions of certain of the literary
passages cited in chapter 13. Mildred Strunk also assisted us in the
selection of examples for this chapter.

Elizabeth V. Deyo has ably managed many of the details con-
nected with our work and has prepared the manuscript for pub-
lication.

Dr. Herbert S. Langfeld made a number of editorial suggestions
which improved the manuscript.

M. S.
H. C.

Princeton, N. J.
June 24, 1946.

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