will enable each reader to see at a glance the items of development of
the child in the several departments brought together in epochs. This
makes it possible to institute comparative observations under the
guidance of Professor Preyer's method. I think that I do not exaggerate
the value of this conspectus when I say that it doubles the value of the
work to the reader.

WILLIAM T. HARRIS.
CONCORD, MASS., _November, 1888_.

CONTENTS.
PAGE

PREFACE BY THE EDITOR v

CONSPECTUS SHOWING THE PROGRESS OF THE CHILD BY MONTHS ix

THIRD PART.

_DEVELOPMENT OF THE INTELLECT._

CHAPTER

XVI.--DEVELOPMENT OF THE CHILD'S INTELLECT INDEPENDENT
OF LANGUAGE 3

XVII.--LEARNING TO SPEAK 33

1. Disturbances of Speech in Adults 34
(1) Periphero-Impressive or Perceptive Disturbances, 36.
(2) Central Disturbances, 37.
(3) Periphero-Expressive or Articulatory Disturbances, 38.

2. The Organic Conditions of Learning to Speak 42

3. Parallel between the Disturbances of Speech in
Adults and the Imperfections of Speech in the Child 45

I. Lalopathy, 47.
A. The Impressive Peripheral Processes
disturbed--Deafness, 47.
B. The Central Processes disturbed--Dysphasia, 47.
(1) The Sensory Processes centrally disturbed, 47.
(2) The Sensori-motor Processes of Diction
disturbed, 48.
(3) The Motor Processes centrally disturbed, 49.
C. The Expressive Peripheral Processes disturbed, 54.
(1) Dyslalia and Alalia, 54.
(2) Literal Pararthria or Paralalia, 56.
(3) Bradylalia, or Bradyarthria, 57.
II. Dysphasia, 58.
III. Dysmimia, 62.

4. Development of Speech in the Child 64

XVIII.--FIRST SOUNDS AND BEGINNINGS OF SPEECH IN THE CASE OF A
CHILD OBS