Publication was supported in part by 



Public Health Service Research Grant M-4648 from 



the National Institute of Mental Health, 



Public Health Service. 



Copyright ©, 1961 



The Williams & Wilkins Company 



Made in the United States of America 



Library of Congress 

 Catalog Card Number 

 60-12279 



COMPOSED AND PRINTED BY THE 



WAVERLY PRESS, INC. 



BALTIMORE 2, MARYLAND, U.S.A. 



