of applications to education and the arts and industries, are pur-
posely omitted. The student, having mastered the course outlined
in this volume, should have available a volume, or a series of vol-
umes, prepared by specialists in these topics, and presenting them
from the scientific point of view. No such volume or series ex-
ists at present, but we may well expect it in the near future.

The first chapter of this volume is difficult for beginners, and
it is possible that instructors will do well to present its most im-
portant points in simpler form, and have the students begin their
reading with the second chapter. In that case, the students should
later return to the first chapter and study it carefully, since it con-
tains the essential scheme of scientific psychology.

The ninth chapter is not intended to be an adequate pres-
entation of the anatomical and physiological facts with which
the student should be familiar, but as a résumé of what the instruc-
tor should present in greater detail, employing such texts, slides,
charts and preparations as may be available. It is not possible to
include in a textbook of psychology the portions of physics and
the biological sciences required for an adequate study of the sub-
ject; and such fragmentary details as might be included are not
sufficient.

While written primarily for college students, the book is also
designed to be of assistance to men in various professions who
wish to become conversant with the foundations of modern psy-
chology. For the book, while dealing with foundations and not
with applications, does represent the general point of view on
which rests the psychology which is being applied in the fields of
education, industry, and the arts, and which will undoubtedly be
applied to medicine before long.

A number of the cuts are from new drawings by Olive C.
Slater, for whose intelligent and careful work my thanks are heart-
ily rendered. So many persons have helped me by criticism and
suggestions and by reading manuscript and proof that I shall not
enter here the long list of their names, although I am profoundly
grateful for the assistance each has rendered.

KNIGHT DUNLAP.

The Johns Hopkins University,
March 7, 1922.

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