To Duren J. H. Ward, Ph. D.,
formerly of the Anthropology Department of Harvard University, who,
as the discoverer of the fourth human type, has added immeasurably
to the world's knowledge of human science.
To Raymond H. Lufkin,
of Boston, who made the illustrations for this volume
scientifically accurate.
To The Roycrofters,
of East Aurora, whose artistic workmanship made it into a thing of
beauty.
And last but not least,
To Sarah H. Young,
of San Francisco, our Business Manager, whose efficiency correlated
all these and placed the finished product in the hands of our
students.
THE AUTHORS
New York City,
June, 1921
DEDICATED
TO
OUR STUDENTS
