ogy. Disputed theories and
unsettled opinions are excluded. The subject matter is made concrete and
practical by the use of many illustrations and through application to
real problems. The style has been kept easy and familiar to facilitate
the reading. In short, there has been, while seeking to improve the
volume, a conscious purpose to omit none of the characteristics which
secured acceptance for the former edition.

On the other hand, certain changes and additions have been made which,
it is believed, will add to the strength of the work. First of all, the
later psychological studies and investigations have been drawn upon to
insure that the matter shall at all points be abreast of the times in
scientific accuracy. Because of the wide use of the text in the training
of teachers, a more specific educational application to schoolroom
problems has been made in various chapters. Exercises for the guidance
of observation work and personal introspection are freely used. The
chapter on Sensation and Perception has been separated into two
chapters, and each subject given more extensive treatment. A new chapter
has been added on Association. The various chapters have been subdivided
into numbered sections, and cut-in paragraph topics have been used to
facilitate the study and teaching of the text. Minor changes and
additions occur throughout the volume, thus adding some forty pages to
the number in the original edition.

Many of the modifications made in the revision are due to valuable
suggestions and kindly criticisms received from many teachers of the
text in various types of schools. To all who have thus helped so
generously by freely giving the author the fruits of their judgment and
experience he gladly renders grateful thanks.

CORNELL COLLEGE,

IOWA.

CONTENTS

CHAPTER I

THE MIND, OR CONSCIOUSNESS PAGE

1. How the mind is to be known: Personal character of
consciousness--Introspection the only means of discovering nature of
consciousness--How we introspect--Studying mental states of others
through expression--Learning to interpret expression. 2. The nature of
consciousness: Inner nature of the mind not revealed by introspection
--Consciousness as a process or stream--Consciousness likened to a
field--The "piling up" of consciousness is attention. 3. Content of
the mental stream: Why we need minds--Content of consciousness
determined by function--Three