THE RECAPITULATION THEORY 

 AND HUMAN INFANCY 



BY 



PERCY E. DAVIDSON 



ASSOCIATE PROFESSOR OF EDUCATION, LELAND STANFORD JUNIOR UNIVERSITY 



SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENT FOR THE DEGREE 



OF DOCTOR OF PHILOSOPHY, IN THE FACULTY OF PHILOSOPHY, 



COLUMBIA UNIVERSITY 



OF 



CALIFORNIA 



PUBLISHED BY 



f~' . 



' 3?fr*lt AffT**ft 



NEW YORK CITY -j^ ST 



1914 



