COPYRIGHT, 1945, BY 



THE COMMONWEALTH FUND 



FIRST PRINTING MARCH 1 945 



SECOND PRINTING DECEMBER 1 945 



SECOND EDITION, REVISED AND ENLARGED 



COPYRIGHT, 1947, BY 



THE COMMONWEALTH FUND 



PUBLISHED BY THE COMMONWEALTH FUND 

 41 EAST 57TH STREET, NEW YORK 22, N.Y. 



PRINTED IN THE UNITED STATES OF AMERICA 

 BY E. L, HILDRETH & COMPANY, INC. 



