OBSERVATIONS CONCERNING THE MENTAL DEVELOPMENT OF THE HUMAN BEING IN THE FIRST YEARS OF LIFE
BY W. PREYER PROFESSOR OF PHYSIOLOGY IN JENA
TRANSLATED FROM THE ORIGINAL GERMAN By H. W. BROWN TEACHER IN THE STATE NORMAL SCHOOL AT WORCESTER, MASS.
NEW YORK D. A P P L E T O N A N D C O M P A N Y
1895
Copyright, 1889,
BY D. APPLETON AND COMPANY.